CN114542415B - Piston compressor for preventing leakage of inflammable gas - Google Patents

Abstract

The present invention relates to a piston compressor, and in particular to a piston compressor for preventing leakage of flammable gas. The object of the present invention is to provide a piston compressor for preventing leakage of flammable gas that can reduce the friction of the piston rod. The invention provides such a piston compressor for preventing leakage of flammable gas, which includes a first support frame, a first shell, a second support frame, a first motor, a connecting block, etc. The upper part of the first support frame is provided with a third support frame. A housing, a second supporting frame is provided between the right sides of the front and rear sides of the first housing, a first motor is provided on the upper part of the second supporting frame, the output shaft of the first motor passes through the first housing, and the output shaft of the first motor There are connecting blocks on it. In the present invention, lubricating oil is added into the storage tank, so that the lubricating oil flows into the dropper. Through the cooperation of the wedge rod and the stopper, the lubricating oil can be dripped on the piston rod through the dropper, thereby reducing the gap between the piston rod and the second shell. The friction reduces the wear of the piston rod.

Description

A piston compressor for preventing leakage of flammable gas

Technical field

The present invention relates to a piston compressor, and in particular to a piston compressor for preventing leakage of flammable gas.

Background technique

As we all know, a gas compressor is a power device that converts mechanical energy into gas pressure energy. It is often used in pneumatic tools to provide gas power. It is also commonly used in the petrochemical, drilling, metallurgy and other industries to pressurize oxygen, hydrogen, ammonia, and natural gas. , coke oven gas, inert gas and other media. At present, people also use gas compressors when canning flammable gases. During the use of existing gas compressors, it is found that when the gas enters the inside of the compressor, It is easy to bring a large amount of dust and impurities into the interior of the compressor, thereby increasing the failure rate of the gas compressor. At the same time, the service life of the gas compressor is reduced, resulting in poor practicality.

Patent application CN210769192U, with the authorization announcement date of 20200616, is a new type of gas compressor that can filter the air entering the interior of the gas compression mechanism through the air inlet pipe, thus reducing the probability of dust in the air entering the interior of the gas compression mechanism. Therefore, the failure rate of the gas compressor is reduced, and the impact of air quality on the service life of the gas compressor is reduced; including a gas storage tank assembly, a motor assembly, a gas compression mechanism and two sets of push handles, and the bottom end of the gas storage tank assembly is set There is a moving mechanism, and the output end of the motor assembly and the input end of the gas compression mechanism are respectively equipped with a power wheel and a driven wheel; it also includes a filter cartridge, a cover plate, two sets of mounting plates, a dust filter core, an extrusion plate, an adjusting threaded rod, There is an adjustment knob, a push block and a rotating plate. A filter cavity is provided inside the filter cartridge. The left end of the filter cavity is connected with a clamping hole, and the right end of the filter cavity is connected with an adjustment threaded hole. Although the above-mentioned patent can filter the air entering the gas compression mechanism through the air inlet pipe, thereby reducing the failure rate of the gas compressor and reducing the impact of air quality on the service life of the gas compressor, the piston rod inside the compressor is After reciprocating motion, it is easy to cause friction with the shell. After a long time, it is easy to cause the piston rod to wear.

Therefore, in order to solve the above shortcomings, a piston compressor for preventing leakage of flammable gas that can reduce the friction of the piston rod is provided.

Contents of the invention

In order to overcome the shortcoming that when people use most existing gas compressors to bottle flammable gases, the piston rod rubs against the outer casing for a long time, which easily leads to piston rod wear, the present invention provides a piston rod that can reduce friction. Piston compressor for preventing leakage of flammable gas.

The present invention is realized through the following technical approaches:

A piston compressor for preventing leakage of flammable gas, including a first support frame, a first shell, a second support frame, a first motor, a connecting block, a first connecting rod, a first fixed frame, a second shell, The piston rod, the sealing ring, the air suction mechanism, the air outlet mechanism, the unloading mechanism, the blocking mechanism and the filtering mechanism are provided with a first shell on the upper part of the first support frame, and a second shell is provided between the right sides of the front and rear sides of the first shell. Support frame, the upper part of the second support frame is provided with a first motor, the output shaft of the first motor passes through the first housing, the output shaft of the first motor is provided with a connecting block, and the right part of the connecting block is rotatably provided with a first connecting rod , a first fixed frame is provided on the left side of the first housing, a second housing is provided at the bottom of the first fixed frame, a piston rod is slidably provided inside the second housing, the right side of the piston rod is rotatably connected to the first connecting rod, and the piston There are two sealing rings on the left side of the outside of the rod to prevent the leakage of flammable gases. The sealing rings are located inside the second shell. The left part of the first shell is equipped with an air suction mechanism for feeding flammable gas. The bottom of the second shell The left side is provided with an air outlet mechanism for discharging flammable gas. The upper part of the first shell is provided with a discharge mechanism for lubricating oil. The piston rod is provided with a blocking mechanism for blocking lubricating oil. The suction mechanism is provided with There are filter mechanisms for filtering flammable gases.

Further, the air suction mechanism includes a third housing, a second connecting rod, a first fixed block and a first spring. A third housing is provided on the left side of the front and rear sides of the first housing, and the inside of the right part of the third housing is connected with the first housing. The second shell is connected, and the inner left part of the third shell is provided with a first fixed block. The middle part of the first fixed block is provided with a second connecting rod slidingly. The second connecting rod blocks the right side of the third shell. The second connecting rod is A first spring is arranged between the rod and the left side of the first fixed block on the same side.

Further, a fourth housing is provided on the left side of the bottom of the second housing, a third connecting rod is slidably provided in the middle of the inner bottom of the fourth housing, and a second spring is provided between the upper part of the third connecting rod and the inner bottom of the fourth housing. A fixed ring is provided on the left side of the bottom of the first housing, and an exhaust pipe is provided at the lower part of the fixed ring. The exhaust pipe is connected to the fourth housing.

Further, the unloading mechanism includes a second fixed frame, a storage tank, a dropper and a plug. Two second fixed frames are provided on the upper part of the first housing, and a storage tank is provided between the upper and middle parts of the second fixed frames. The storage tanks A dropper is provided on the right side of the bottom, the dropper passes through the first shell and the second shell, and a plug is placed in the middle of the upper part of the storage tank.

Further, the blocking mechanism includes a fixed rod, a wedge rod, a third spring, a second fixed block, a first sliding rod, a fourth spring and a stopper. There is a fixed rod in the middle of the right side of the upper part of the piston rod. There are wedge-shaped rods sliding on both sides, and third springs are provided between the lower side of the wedge-shaped rod and the bottom of the fixed rod. Four second fixed blocks are spaced on the right side of the top of the second housing, and two second fixed blocks are provided on the same side laterally. There is a first sliding rod between the inner sides of the two fixed blocks, and a stopper is slidingly provided between the right sides of the first slider. When the wedge-shaped rod moves to the left, it will contact the stopper, and the stopper blocks the bottom of the dropper. A fourth spring is provided between the front and rear sides of the right side of the block and the second fixed block on the same side, and the number of the fourth spring is two.

Further, the filter mechanism includes a third fixed frame, a second sliding rod, a fifth spring, a first pull rod and a filter block. The third fixed frame is provided on the outside of the third housing, and the left and right sides of the third fixed frame are provided inside. There are two second sliding rods. A first pull rod is slidably provided between the two second slide rods in the same vertical direction. Two fifth pull rods are provided between the outer side of the first pull rod and the third fixed frame on the same side. The spring and the fifth spring are all wound around the second slide rod on the same side, and filter blocks are placed between the inner sides of the first pull rods on the same side laterally.

Further, it also includes a heat dissipation mechanism for dissipating heat inside the first housing. The heat dissipation mechanism includes a fourth fixed frame, a second motor, a protective shell and a fan blade. A fourth fixed frame is provided on the right side of the first housing. A second motor is provided in the middle of the right side of the four fixed frames, a protective shell is provided on the right side of the first housing, and a fan blade is provided on the output shaft of the second motor, and the fan blade is located inside the protective shell.

Further, a clamping mechanism for clamping the container is included. The clamping mechanism includes a fifth fixed frame, a tightening rod, a sixth spring and a second pull rod. The right parts of the front and rear sides of the first shell are provided with fifth Fixed frame, the lower part of the fifth fixed frame is provided with sliding tightening rods on both left and right sides. Sixth springs are arranged between the tightening rod and the inner lower part of the fifth fixed frame on the same side. There are also sixth springs between the outer tightening rods on the same side laterally. A second pull rod is provided, and the inner sides of the tightening rods on the same longitudinal side are in contact with each other.

The invention provides a piston compressor for preventing leakage of flammable gas, which has the following advantages:

1. After the present invention connects the flammable gas to the third casing, when the flammable gas enters the third casing, the filter block can filter the flammable gas, thereby reducing the failure rate and at the same time reducing the risk of the flammable gas from preventing the flammable gas from entering the third casing. Effect of leakage of flammable gases on the service life of piston compressors.

2. In the present invention, the lubricating oil is added into the storage tank, so that the lubricating oil flows into the dropper. Through the cooperation of the wedge rod and the stopper, the lubricating oil can be dripped on the piston rod through the dropper, thereby reducing the friction between the piston rod and the second shell. The friction between them reduces the wear of the piston rod.

3. In the present invention, under the action of the sealing ring, when the flammable gas enters the second housing, the sealing ring can block the flammable gas, thereby preventing the leakage of the flammable gas.

4. In the present invention, by turning on the second motor, the fan blades can rotate, thereby blowing air inside the first housing, thereby dissipating heat inside the first housing, and preventing the temperature inside the first housing from being too high.

5. In the present invention, by placing the container between the tightening rods, the tightening rods can clamp the container, thereby making it convenient for people to clamp and place the container.

Description of drawings

Figure 1 is a schematic three-dimensional structural diagram of the present invention.

Figure 2 is a first partial cross-sectional view of the present invention.

Figure 3 is a second partial cross-sectional view of the present invention.

Figure 4 is a schematic three-dimensional structural diagram of the suction mechanism of the present invention.

Figure 5 is an enlarged view of position A of the present invention.

Figure 6 is a partial cross-sectional view of the air outlet mechanism of the present invention.

Figure 7 is an enlarged view of position B of the present invention.

Figure 8 is a schematic three-dimensional structural diagram of the unloading mechanism of the present invention.

Figure 9 is a schematic three-dimensional structural diagram of the blocking mechanism of the present invention.

Figure 10 is an enlarged view of position C of the present invention.

Figure 11 is a schematic three-dimensional structural diagram of the filter mechanism of the present invention.

Figure 12 is an enlarged view of D of the present invention.

Figure 13 is a schematic three-dimensional structural diagram of the heat dissipation mechanism of the present invention.

Figure 14 is a partial cross-sectional view of the heat dissipation mechanism of the present invention.

Figure 15 is a first three-dimensional structural schematic diagram of the clamping mechanism of the present invention.

Figure 16 is a schematic diagram of the second three-dimensional structure of the clamping mechanism of the present invention.

Explanation of reference signs: 1_first support frame, 2_first housing, 3_second support frame, 4_first motor, 5_connecting block, 6_first connecting rod, 7_first fixed frame, 8_Second housing, 9_Piston rod, 10_Sealing ring, 11_Suction mechanism, 111_Third housing, 112_Second connecting rod, 113_First fixed block, 114_First spring, 12_ Air outlet mechanism, 121_fourth shell, 122_third connecting rod, 123_second spring, 124_fixing ring, 125_exhaust pipe, 13_unloading mechanism, 131_second fixed frame, 132_storage tank , 133_dropper, 134_stopper, 14_stopper mechanism, 141_fixed rod, 142_wedge rod, 143_third spring, 144_second fixed block, 145_first sliding rod, 146_fourth Spring, 147_stop block, 15_filter mechanism, 151_third fixed frame, 152_second slide rod, 153_fifth spring, 154_first pull rod, 155_filter block, 16_heat dissipation mechanism, 161_ The fourth fixed frame, 162_second motor, 163_protective shell, 164_fan blade, 17_clamping mechanism, 171_fifth fixed frame, 172_ tightening rod, 173_ sixth spring, 174_ second pull rod .

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings, and embodiments of the present invention will be given in conjunction with the accompanying drawings.

Example 1

A piston compressor for preventing leakage of flammable gas, including a first support frame 1, a first shell 2, a second support frame 3, a first motor 4, a connecting block 5, a first connecting rod 6, a first fixed Frame 7, second shell 8, piston rod 9, sealing ring 10, air suction mechanism 11, air outlet mechanism 12, unloading mechanism 13, material blocking mechanism 14 and filtering mechanism 15, as shown in Figures 1 to 12, the first The upper part of the support frame 1 is provided with a first shell 2. A second support frame 3 is welded between the right sides of the front and rear sides of the first shell 2. A first motor 4 is installed on the upper part of the second support frame 3 through bolts. The first motor 4 The output shaft of the first housing 2 passes through the first housing 2. The output shaft of the first motor 4 is provided with a connecting block 5. The right part of the connecting block 5 is rotatably provided with a first connecting rod 6. There is a connecting rod 6 on the left side inside the first housing 2. A fixed frame 7. A second shell 8 is provided at the bottom of the first fixed frame 7. A piston rod 9 is slidably provided inside the second shell 8. The right side of the piston rod 9 is rotatably connected to the first connecting rod 6. The outside of the piston rod 9 There are two sealing rings 10 on the left side. When flammable gas enters the second housing 8, the sealing rings 10 can block the flammable gas and prevent the leakage of the flammable gas. The sealing rings 10 are located inside the second housing 8. The first The left part of the housing 2 is provided with an air suction mechanism 11, the second housing 8 is provided with an air outlet mechanism 12 on the left side of the bottom, the upper part of the first housing 2 is provided with a discharge mechanism 13, the piston rod 9 is provided with a material blocking mechanism 14, and the air suction mechanism 11 is provided with a filtering mechanism 15.

The suction mechanism 11 includes a third housing 111, a second connecting rod 112, a first fixed block 113 and a first spring 114. Referring to Figures 4 and 5, the left sides of the first housing 2 at the front and rear sides are welded with In the third housing 111, people can connect the flammable gas to the third housing 111, so that the flammable gas can enter the third housing 111. The inside of the right part of the third housing 111 is connected with the second housing 8, and the left part of the third housing 111 is connected with the second housing 8. First fixing blocks 113 are provided on the inside, and second connecting rods 112 are slidably provided in the middle of the first fixing blocks 113. The second connecting rods 112 all block the right side of the third housing 111. The second connecting rods 112 are on the same side as There are first springs 114 between the left sides of the first fixed blocks 113.

The air outlet mechanism 12 includes a fourth housing 121, a third connecting rod 122, a second spring 123, a fixing ring 124 and an exhaust pipe 125. Referring to Figures 6 and 7, a fourth housing 8 is welded on the left side of the bottom. Shell 121, the fourth shell 121 is provided with a third connecting rod 122 slidingly in the middle of the inner bottom. A second spring 123 is provided between the upper part of the third connecting rod 122 and the inner bottom of the fourth shell 121. There is a second spring 123 on the left side of the bottom of the first shell 2. There is a fixed ring 124, and an exhaust pipe 125 is provided at the bottom of the fixed ring 124. People can connect the container with the exhaust pipe 125, so that flammable gas can enter the container through the exhaust pipe 125. The exhaust pipe 125 is connected with the fourth shell 121 .

The unloading mechanism 13 includes a second fixed frame 131, a storage tank 132, a dropper 133 and a plug 134. As shown in Figure 8, two second fixed frames 131 are welded to the upper part of the first housing 2. A storage tank 132 is provided between the middle parts of the sides. People can add lubricating oil into the storage tank 132 to load the lubricating oil. A dropper 133 is provided on the right side of the bottom of the storage tank 132 and the dropper 133 passes through the first shell 2 and the second housing 8, with a plug 134 placed in the middle of the upper part of the storage tank 132.

The blocking mechanism 14 includes a fixed rod 141, a wedge rod 142, a third spring 143, a second fixed block 144, a first sliding rod 145, a fourth spring 146 and a stopper 147. As shown in Figures 9 and 10, the piston A fixed rod 141 is welded to the middle part of the right side of the upper part of the rod 9. A wedge-shaped rod 142 is slidably provided on both front and rear sides of the fixed rod 141. A third spring 143 is provided between the lower side of the wedge-shaped rod 142 and the bottom of the fixed rod 141. The second shell 8 There are four second fixed blocks 144 spaced on the right side of the inner top. There are first sliding rods 145 between the two second fixed blocks 144 on the same side laterally. The first sliding rods 145 slide between the right sides. A stopper 147 is provided. The stopper 147 can block the bottom of the dropper 133 to prevent the dropper 133 from leaking. When the wedge-shaped rod 142 moves to the left, it will contact the stopper 147. The front and rear sides of the right side of the stopper 147 are in contact with the same. Fourth springs 146 are disposed between the second fixing blocks 144 on both sides, and the number of the fourth springs 146 is two.

The filter mechanism 15 includes a third fixed frame 151, a second sliding rod 152, a fifth spring 153, a first pull rod 154 and a filter block 155. Referring to Figures 11 and 12, a third casing 111 is welded on the outside. The fixing frame 151 and the third fixing frame 151 are provided with two second sliding rods 152 on the left and right sides, and a first pulling rod 154 is slidably provided between the two second sliding rods 152 in the same vertical direction. There are two fifth springs 153 between the outside of the 154 and the third fixed frame 151 on the same side. The fifth springs 153 are wound around the second sliding rod 152 on the same side. Filter blocks 155 are placed between them. When flammable gas passes through the filter blocks 155, the filter blocks 155 can filter the flammable gas.

In the initial state, the fifth spring 153 is in a compressed state. When people need to use the piston compressor for preventing leakage of flammable gas, first the plug 134 is rotated and unscrewed, and then the lubricating oil is added to the storage tank 132, so that the lubricating oil Flow into the dropper 133, then reverse the plug 134 and screw it back, then connect the container to the exhaust pipe 125, then connect the flammable gas to the third housing 111, and then turn on the first motor 4 and the output of the first motor 4 The shaft drives the connecting block 5 to rotate, so that the connecting block 5 drives the piston rod 9 to move left and right through the first connecting rod 6. When the piston rod 9 moves to the right, the piston rod 9 drives the fixed rod 141 and the wedge rod 142 to move to the right. When the wedge rod 142 contacts the block 147, the block 147 presses the wedge rod 142 to move downward, and the third spring 143 stretches. When the wedge rod 142 separates from the block 147, the third spring 143 returns to its original state, and the third spring 143 The spring 143 drives the wedge rod 142 to move upward and reset, and at the same time, under the action of atmospheric pressure, the second connecting rod 112 is pressed to move to the right, and the first spring 114 is compressed, so that the second connecting rod 112 no longer blocks the right side of the third housing 111 side, so that the flammable gas enters the third housing 111 through the filter block 155. At this time, the filter block 155 will filter the flammable gas, leaving some dust and impurities on the filter block 155, and then the flammable gas will pass through the third housing 111. The shell 111 enters the second shell 8. When the piston rod 9 moves to the left and resets, the first spring 114 returns to its original state. The first spring 114 drives the second connecting rod 112 to move to the left and resets, causing the second connecting rod 112 to reset. Block the right side of the third housing 111, and at the same time, under the action of atmospheric pressure, the third connecting rod 122 is squeezed to move downward, and the second spring 123 is compressed, allowing the flammable gas in the second housing 8 to enter the fourth housing 121. , and then enters the container through the exhaust pipe 125. At the same time, the piston rod 9 drives the fixed rod 141 and the wedge rod 142 to move to the left and reset. When the wedge rod 142 contacts the stopper 147, the wedge rod 142 drives the stopper 147 to move to the left. The fourth spring 146 stretches so that the stopper 147 no longer blocks the bottom of the dropper 133, so that the lubricating oil drips on the piston rod 9 through the dropper 133, thereby reducing the friction between the piston rod 9 and the second housing 8. , when the fourth spring 146 cannot stretch, the block 147 squeezes the wedge rod 142 to move downward, and the third spring 143 stretches. When the wedge rod 142 separates from the block 147, the fourth spring 146 and the third spring 143 Return to the original state, the fourth spring 146 drives the stopper 147 to move to the right and reset, so that the stopper 147 blocks the bottom of the dropper 133 again, and the third spring 143 drives the wedge rod 142 to move upward and reset. When the piston rod 9 moves to the right again, The second spring 123 returns to its original state, and the second spring 123 drives the third connecting rod 122 to move upward and return to its original state. The device operates repeatedly to fill the container with flammable gas. During this period, the sealing ring 10 will remove the flammable gas in the second housing 8. The gas is blocked to prevent the leakage of flammable gas. When the container is full, turn off the first motor 4 and stop all the above rotations. Then disconnect the flammable gas from the third housing 111, and then disconnect the container from the exhaust pipe 125. , then remove the container, and then pull the first pull rod 154 to move outward, so that the first pull rod 154 releases the filter block 155, then remove the filter block 155, then release the first pull rod 154, and the fifth spring 153 returns to its original state , the fifth spring 153 drives the first pull rod 154 to move inward and reset, then clean the filter block 155, and then put the filter block 155 back to its original position. When the filter block 155 contacts the first pull rod 154, the filter block 155 is squeezed The first pull rod 154 moves outward, the fifth spring 153 is compressed, and under the elastic force of the fifth spring 153, the first pull rod 154 clamps the filter block 155.

Example 2

On the basis of Embodiment 1, a heat dissipation mechanism 16 is also included. The heat dissipation mechanism 16 includes a fourth fixed frame 161, a second motor 162, a protective shell 163 and a fan blade 164. Refer to Figures 1, 13 and 14. As shown, the right part of the first housing 2 is connected with a fourth fixing bracket 161 through bolts, and a second motor 162 is bolted to the middle right side of the fourth fixing bracket 161. A protective shell 163 is provided on the right side of the first housing 2, and the second motor 162 The output shaft is provided with a fan blade 164. When the fan blade 164 rotates, it can dissipate heat inside the first housing 2. The fan blade 164 is located inside the protective shell 163.

When people need to use the piston compressor for preventing leakage of flammable gas, the second motor 162 can be turned on, and the output shaft of the second motor 162 drives the fan blade 164 to rotate, so that the fan blade 164 blows the inside of the first housing 2 , and then dissipate heat inside the first housing 2. After people turn off the first motor 4, they turn off the second motor 162 to stop the rotation of the fan blades 164.

It also includes a clamping mechanism 17. The clamping mechanism 17 includes a fifth fixed frame 171, a tightening rod 172, a sixth spring 173 and a second pull rod 174. Referring to Figures 1, 15 and 16, the first housing 2 The right parts of the front and rear sides are connected with fifth fixing brackets 171 through bolts. The left and right sides of the lower part of the fifth fixing bracket 171 are provided with tightening rods 172 slidingly. The container is placed between the tightening rods 172, and the tightening rods 172 can When the container is clamped, a sixth spring 173 is provided between the tightening rod 172 and the inner lower part of the fifth fixing frame 171 on the same side. A second pull rod 174 is installed between the outer sides of the tightening rod 172 on the same side laterally. The inner sides of the tightening rods 172 are all in contact with each other.

When people need to use the piston compressor for preventing leakage of flammable gas, they can put the container between the tightening rods 172. When the container contacts the tightening rods 172, the container squeezes the tightening rods 172 to move outward, and the sixth spring 173 is compressed. Under the elastic force of the sixth spring 173, the tightening rod 172 clamps the container. At the same time, the tightening rod 172 drives the second pull rod 174 to move outward. When people take out the container, the second pull rod 174 is pulled to move outward. This drives the tightening rod 172 to move outward, causing the tightening rod 172 to loosen the container, and then the container can be taken out, and then the second pull rod 174 is loosened, the sixth spring 173 returns to its original state, and the sixth spring 173 drives the tightening rod 172 and the second The pull rod 174 moves inward and resets, thereby making it convenient for people to clamp and place the container.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, and substitutions can be made to these embodiments without departing from the principles and spirit of the invention. and variants.

Claims (6)

1. A piston compressor for preventing leakage of flammable gas, including a first support frame (1), a first shell (2), a second support frame (3), a first motor (4), and a connecting block ( 5), the first connecting rod (6), the first fixed frame (7), the second housing (8), the piston rod (9) and the sealing ring (10). The upper part of the first support frame (1) is provided with a first Housing (2), a second support frame (3) is provided between the right sides of the front and rear sides of the first housing (2), a first motor (4) is provided on the upper part of the second support frame (3), and the first motor (3) The output shaft of 4) passes through the first housing (2), the output shaft of the first motor (4) is provided with a connecting block (5), and the right part of the connecting block (5) is rotatably provided with a first connecting rod (6) , a first fixed frame (7) is provided on the left side of the first housing (2), a second housing (8) is provided at the bottom of the first fixed frame (7), and a piston rod is slidably provided inside the second housing (8) (9), the right side of the piston rod (9) is rotatably connected to the first connecting rod (6), and there are two sealing rings (10) on the left side of the outside of the piston rod (9) to prevent the leakage of flammable gases. The ring (10) is located inside the second housing (8), and is characterized in that it also includes an air suction mechanism (11), an air outlet mechanism (12), a blanking mechanism (13), a blocking mechanism (14) and a filtering mechanism. (15), the left part of the first housing (2) is provided with an air suction mechanism (11) for feeding flammable gas, and the left side of the bottom of the second housing (8) is provided with an air outlet mechanism (12) for discharging flammable gas. ), the upper part of the first housing (2) is provided with a discharge mechanism (13) for loading lubricating oil, the piston rod (9) is provided with a blocking mechanism (14) for blocking the lubricating oil, and the suction mechanism (11 ) is provided with a filtering mechanism (15) for filtering flammable gases; The unloading mechanism (13) includes a second fixing frame (131), a storage tank (132), a dropper (133) and a plug (134). The upper part of the first housing (2) is provided with two second fixing frames (131). ), a storage tank (132) is provided between the upper and middle parts of the second fixed frame (131), a dropper (133) is provided on the right side of the bottom of the storage tank (132), and the dropper (133) passes through the first housing (2 ) and the second shell (8), a plug (134) is placed in the middle of the upper part of the storage tank (132); The blocking mechanism (14) includes a fixed rod (141), a wedge rod (142), a third spring (143), a second fixed block (144), a first sliding rod (145), a fourth spring (146) and The stopper (147) is provided with a fixed rod (141) in the middle of the upper right side of the piston rod (9). The fixed rod (141) is provided with a sliding wedge rod (142) on both front and rear sides. The lower side of the wedge rod (142) is connected to the stopper (147). There are third springs (143) between the bottoms of the fixing rods (141), four second fixing blocks (144) are arranged at intervals on the right side of the top of the second housing (8), and two second fixing blocks (144) are arranged on the same side laterally. There are first sliding rods (145) between the inner sides of the blocks (144), and there are sliding blocks (147) between the right sides of the first sliding rods (145). When the wedge-shaped rod (142) moves to the left, it will The stopper (147) contacts, the stopper (147) blocks the bottom of the dropper (133), and a fourth fixed block (144) is provided between the front and rear sides on the right side of the stopper (147) and the second fixed block (144) on the same side. spring (146), the number of the fourth spring (146) is two. 2. A piston compressor for preventing leakage of flammable gas according to claim 1, characterized in that the suction mechanism (11) includes a third housing (111), a second connecting rod (112), a third A fixed block (113) and a first spring (114), a third housing (111) is provided on the left side of the front and rear sides of the first housing (2), and the inner right side of the third housing (111) is connected to the second housing (8) Connected, the third housing (111) is provided with a first fixed block (113) on the inner left side, and a second connecting rod (112) is slidably provided in the middle of the first fixed block (113). (112) all block the right side of the third housing (111), and a first spring (114) is provided between the second connecting rod (112) and the left side of the first fixed block (113) on the same side. 3. A piston compressor for preventing leakage of flammable gas according to claim 2, characterized in that the gas outlet mechanism (12) includes a fourth housing (121), a third connecting rod (122), a second The spring (123), the fixed ring (124) and the exhaust pipe (125) are provided with a fourth housing (121) on the left side of the bottom of the second housing (8), and a third sliding type is provided in the middle of the inner bottom of the fourth housing (121). Three connecting rods (122), a second spring (123) is provided between the upper part of the third connecting rod (122) and the inner bottom of the fourth housing (121), and a fixing ring (124) is provided on the left side of the bottom of the first housing (2) ), the lower part of the fixed ring (124) is provided with an exhaust pipe (125), and the exhaust pipe (125) is connected with the fourth housing (121). 4. A piston compressor for preventing leakage of flammable gas according to claim 3, characterized in that the filtering mechanism (15) includes a third fixed frame (151), a second sliding rod (152), a third Five springs (153), the first pull rod (154) and the filter block (155) are provided with a third fixing bracket (151) on the outside of the third housing (111), and there are two fixing brackets (151) on the left and right sides of the third fixing bracket (151). There are two second sliding rods (152), and a first tie rod (154) is slidably provided between the two second slide rods (152) in the same vertical direction. The outer side of the first tie rod (154) and the third tie rod (154) on the same side There are two fifth springs (153) between the three fixed frames (151). The fifth springs (153) are all wound on the second sliding rod (152) on the same side, and the first pull rod (154) on the same side laterally. ), filter blocks (155) are placed between the inner sides. 5. A piston compressor for preventing leakage of flammable gas according to claim 4, characterized in that it also includes a heat dissipation mechanism (16) for dissipating heat inside the first housing (2), and the heat dissipation mechanism (16) 16) It includes a fourth fixed frame (161), a second motor (162), a protective shell (163) and a fan blade (164). A fourth fixed frame (161) is provided on the right side of the first housing (2). A second motor (162) is provided in the middle of the right side of the four fixed brackets (161), a protective shell (163) is provided on the right side of the first housing (2), and a fan blade (164) is provided on the output shaft of the second motor (162). ), the fan blade (164) is located inside the protective shell (163). 6. A piston compressor for preventing leakage of flammable gas according to claim 5, characterized in that it also includes a clamping mechanism (17) for clamping the container, and the clamping mechanism (17) includes a third Five fixed brackets (171), tightening rods (172), sixth springs (173) and second pull rods (174). The fifth fixed brackets (171) are provided on the right parts of the front and rear sides of the first housing (2). There are tightening rods (172) slidingly provided on both left and right sides of the lower part of the fifth fixed frame (171). A sixth spring (173) is provided between the tightening rod (172) and the inner lower part of the fifth fixed frame (171) on the same side. ), there are second tie rods (174) between the outer sides of the tightening rods (172) on the same side laterally, and the inner sides of the tightening rods (172) on the same side longitudinally are in contact with each other.