JP3119690U - Improved piston head structure of piston rod - Google Patents

Abstract

An object of the present invention is to improve the structure of a piston head part of a piston rod, and particularly to improve the piston head capable of greatly reducing noise generated when the piston head reciprocates when the piston reciprocates at high speed. .
Mainly, at the tip of a piston rod, a valve seat is used as a base for assembly, and a friction-resistant, leak-proof member and a pair of central positioning slide tubes are formed in each of the edge rings of the outer ring, The elastic member and the valve portion of the piston are combined, and the head of the elastic piston is integrally formed to ensure that the extruded water does not leak. Also, when returning the piston rod, water easily passes through the valve seat and is drawn into the tank chamber, so that the piston and the valve portion of the piston do not collide strongly in the reciprocating operation by the buffering action of the elastic member. When reciprocating, practicality of noise reduction and leakage prevention is achieved.
[Selection] Figure 1

Description

  The present invention relates to the improvement of the piston head structure of the piston rod, and is assembled by positioning the piston head directly with a valve seat, the outside is slid with a leak-proof friction-resistant ring, and the center is slid with positioning. When a protective cover is combined with a pipe and parts such as springs and valve seals are installed inside and water is pushed out to the piston, the valve part of the piston can securely seal the water intrusion part of the valve seat and is stable. The operation to push out the water is obtained, and when returning the piston, the spring cushions to apply pressure to the elasticity of the valve seal to provide a play part with the piston, so that water can be drawn easily and reciprocated. In this case, no noise is generated due to the collision between the valve seal and the piston, leakage due to the reciprocating motion of the piston is prevented, safety is improved, and noise can be used. The object can be achieved.

  Designed to extrude water with a piston rod at the time of pressurization of internal reciprocating motion of a conventional agricultural high pressure sprayer, by the operation of pressurizing and pushing out the water, the pressurized part of the piston rod receives a high pressure reaction force, The leakage prevention effect directly affects the overall stable pressurizing effect, and is extremely important in the design of the reciprocating motion of the piston. The pressure rod portion of a general reciprocating piston rod is first designed, and most of the steps are stepped by the end of the piston rod (30) to the piston head portion of the high pressure side piston rod (30) as shown in FIGS. Piston ring (33) provided with a cylindrical shaft surface, covering the base portion (31) from the outer end to the inside, covering the sliding tube (32) on the central shaft surface outside the case, and having a hole in the center And a positioning plate (34) that is not fixed to the outside of the ring is installed, combined with an elastic fitting, and then fixed with a nut (36) to prevent the piston ring (33) from sliding and moving. When the rod (30) is reciprocated during the pressurizing process, the piston ring (33) can come into contact with the base part (31) and can be controlled in a sealed state so that pressure can be stably applied during the pressurizing process. Was free, in the process of returning to the original, for pressure to draw water, timely piston ring (33) is might move out, it is blocked by the outer positioning plate (34). By forming a hole through which the water passes, the fluid is drawn into the tank, and the piston rod (30) enables the operation of pushing out the water by pressurization again.

  In the design of the operation that pushes out water under pressure by a similar reciprocating motion and draws in water, the piston ring (33) and the base part (31) are actually used for leak prevention, sealing and deformation prevention for a long time. The piston ring (33) is rapidly made to collide with the base part (31) in the reverse direction by pressing the water in the reverse direction, which is usually made of metal or a hard material and extrudes water during the pressurizing operation. Produces a high impact sound. The high-speed reciprocating motion of the piston generates noise due to repeated collisions during the operation of pushing out water, and the noise caused by the continuous collisions with a fixed period becomes a serious pollution of the use environment and makes it impossible for the operator to stand. After all, the main cause is between the piston ring (33) and the base part (31), and a hard material is required and the high sealing design ensures the effect of applying pressure and stable pressure, thus It makes the overall noise solution even more difficult. The design space where the structure of the pressure end of the current piston rod is easily improved has the ability to stably apply pressure during the reciprocating motion of the piston of the high pressure pump to prevent leaks and use it with low noise. By doing so, it is possible to reduce the noise during the pressurization of the entire reciprocating motion, and it is possible to achieve the goal that the contractor should actively research for improvement.

  The present inventor is a manufacturer of specialized agricultural equipment, and the practical demands that can be applied to noise and stable pressure generated during use, especially with respect to the design defects of the piston head of the piston rod. On the other hand, after devoting himself to the research of improvement and testing the improved design many times, he finally developed the structure improvement of the piston head of the piston rod according to the present invention. The valve seat is combined with the stepped end of the piston rod, a flow hole is provided through the seat body, the valve seal seals the outside, and the exterior of the seat body is an elastic member covered with a protective cover. It is assembled and elastic cushioning to the sliding of the valve part of the piston can reduce the noise of the seating surface caused by the collision, can surely obtain a sealing effect to prevent leakage, and the current piston end is repeatedly used It is effective in solving the drawbacks of the noise that is generated.

  The main purpose of the present invention is to combine a valve seat at the end of the piston rod, so that a flow hole is provided through the seat body, the outside is bonded by a valve seal, and the opening / closing operation can be controlled. The outside of the valve is properly supported by a protective cover that is perforated by an elastic member. When the piston rod reciprocates, it is combined with an elastic buffer to reduce noise caused by the impact between the valve seal and the valve seat. It is possible to achieve the purpose of safety in accordance with practicality, noise reduction.

  As shown in FIGS. 1 to 4, the improvement of the structure of the piston head portion of the piston rod according to the present invention provides a piston rod (11) that is installed inside the high-pressure pump body (10) and reciprocates. The end of the reciprocating portion of the piston rod (11) is a stepped end, which is positioned at the stepped end mainly by the valve seat (12), and the outer edge of the seat is friction resistant. The seal is sealed by a leak prevention member (13) comprising a ring and a rubber ring, and becomes a sealing part of the piston. The leak prevention member (13) is brought into contact with the entire valve seat (12) and penetrated into the inside. A plurality of flow holes (14) are formed so that fluid can flow through the holes, and the outside of the seat is covered with a plastic protective cover (15), and the central portion of the protective cover (15) A pair of An installed sliding tube (16) is installed, abutted in a recessed ring on the end face of the valve seat (12), and a stable combination between the protective cover (15) and the seat body, and an intermediate ring (17 ), The height is appropriately projected, and after the elastic member (18) is drilled, a spring is generally used, and the cap-shaped valve seal (19) is brought into contact with the outer surface of the valve seat (12). Are attached and combined, and the head position of the piston rod (11) is fixed to the outside of the protective cover (15) with the elastic metal fitting (20) and the nut (21), and the water for the piston rod (11) is pushed out. I made the structure of the piston head part.

  When designing the structure of the piston valve seat for pushing out the water of the piston rod (11) according to the present invention, the assembly of the valve seat (12), the outer edge surface of the seat body has an appropriate hardness of the leakage prevention member (13). By being surrounded by leakage prevention, the pressure can be stably applied during the reciprocating motion of the piston, and the effect of preventing leakage can be secured. For the control of pushing out the water by the head portion of the piston rod (11), the protective cover (15) The intermediate ring (17) in the interior has an appropriate height, and the elastic member (18) absorbs the pressure of the space pushed out by the restriction of the length, so that the elastic member (18) can be used securely. Protects and prevents the risk of disconnection due to excessive extrusion pressure, and when the piston returns, fluid is taken in by the water inlet at one end of the piston rod (11) and into the valve seat (12) When the punch hole (14) is installed and the valve seal (19) is pushed open, it is drawn into the tank chamber (22), and when the piston rod (11) controls the pushing operation, (12) The valve seal (19) covered at the end receives the opposite pressure, and at the same time, the water inlet is sealed, and an operation can be performed in which pressure can be stably applied in a sealed state. The valve seal (19) is sealed in the water (12) of the valve seat (12) because the pressure is reduced when the piston rod (11) returns to its original state in the process of returning to the original state after the extrusion. And the water is drawn into the tank chamber (22), and the displacement of the entire valve seal (19) is offset by the elasticity of the elastic member (18) installed in the protective cover (15). When the pressure is applied according to the elastic member (18) and the buffer of the fluid pressure, it is stably pasted up to the end of the valve seat (12), and water is drawn in again in a sealed state, and pushed out repeatedly. It is possible to achieve a continuous operation in which water is drawn in, no noise is generated due to an impact between the valve seal (19) and the valve seat (12), noise is generated in the reciprocating motion of the whole piston, and the state is stable in a sealed state. Pressurizing That concern when no longer can achieve the purpose for practical use.

The assembly inclination exploded view of the structure of the piston head part concerning this invention. The assembly external appearance reference drawing which the piston rod which concerns on this invention has. The assembly plane conceptual diagram of the piston head part which concerns on this invention. The conceptual diagram of the process of drawing in the water of the piston head part which concerns on this invention. The assembly inclination exploded view of the structure of the piston head part concerning a prior art. The assembly external appearance reference drawing of the structure of the piston head part which concerns on a prior art. The assembly plane conceptual diagram of the piston head part which concerns on a prior art. The conceptual diagram of the process of drawing in the water of the piston head part which concerns on a prior art.

Explanation of symbols

10 ......... Main body 11 ......... Piston rod 12 ......... Valve seat 13 ......... Leakage prevention member 14 ......... Hole 15 ......... Protective cover 16 ......... Sliding tube 17 ......... ... Intermediate ring 18 ... Elastic member 19 ... Piston valve 20 ... Metal fitting 21 ... Nuts 22 ... Tank 30 ... Piston rod 31 ... Base 32 ... ... …… Sliding tube 33 ………… Piston ring 34 …………… Positioning plate 35 …………… Fitting 36 …………… Nut

Claims (3)

The structure of the piston head part of the piston rod provided with the pump body, the piston rod, and the combination member for reciprocating the piston tip, wherein the tip for reciprocating the piston rod is the valve seat as a base device, The outer edge is sealed with a friction-resistant and leak-proof member and is provided with a plurality of sink holes penetrating inside the seat body so that fluid can flow through the holes. Is covered with a plastic protective cover, and a pair of positioning slide tubes are installed in the center of the protective cover, one end is in contact with the concave ring on the valve seat end face, and the protective cover and the seat are stably combined, In the intermediate ring inside the cover, the altitude is appropriately projected, and after piercing the elastic member, it comes into contact with the cap-shaped valve seal, and the outer surface of the valve seat is adhered and combined, When the stone rod draws and pushes water, the structure of the piston head of the piston rod is improved by the buffering action of the elastic member, so that noise due to collision between the valve seal and the valve seat is not generated in the reciprocating operation. . 2. The structure improvement of the piston head part of the piston rod according to claim 1, wherein the leakage preventing member is a piston seal part comprising a friction-resistant ring and a rubber ring. 2. The piston rod according to claim 1, wherein the inside of the protective cover is at a height of the protrusion of the intermediate ring, and the elastic member can control the limit of pushing the length, thereby ensuring safety when using the elastic member. Improved piston head structure.

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