CN206479279U - A kind of improving piston type pressure gauge - Google Patents

Abstract

The utility model discloses an improved piston pressure gauge, which comprises a measuring system. A piston cylinder and a displacement sensor for measuring the movement of the piston are arranged inside the measuring system, and a piston system capable of preventing the piston rod from breaking is also arranged in the measuring system. . The improved piston pressure gauge of the utility model effectively solves the problem that the piston rod of the piston pressure gauge in the prior art is easily broken by redesigning the piston system and adding an anti-breakage elastic block to the measurement system.

Description

An Improved Piston Pressure Gauge

technical field

The utility model belongs to the technical field of measuring equipment, in particular to an improved piston pressure gauge.

Background technique

Piston pressure gauge is a standard pressure measuring instrument with high accuracy, high reproducibility and high reliability. The working mechanism of piston pressure gauge is based on the definition of pressure concept, and is based on Pascal's law and hydrostatic balance principle , the process of giving an accurate pressure value by loading a special weight of known mass on a piston of known effective area to give an accurate pressure value. Piston pressure gauges are often used internationally as national benchmarks and working benchmarks or pressure measurement Therefore, the piston pressure gauge has a wide range of applications in its field. Existing piston pressure gauges usually consist of three parts: piston system, special weights, and calibrator. They are mainly used in measuring rooms, laboratories, and production or scientific experiment links as pressure reference devices. Piston pressure gauges are also used directly. It is applied to the voting monitoring of other local instruments in the high-reliability monitoring link. Compared with other pressure gauges, the existing 250MPa piston pressure gauge has the problems that the piston rod is very thin and easy to break, the weight shakes violently after rotation, and the pressure adjustment process is cumbersome and laborious. Therefore, the piston pressure gauge still needs to be improved.

Utility model content

The purpose of the utility model is to provide an improved piston pressure gauge to solve the problem that the piston rod of the piston pressure gauge in the prior art is easily broken.

The technical solution adopted by the utility model is: an improved piston pressure gauge, including a measuring system, the measuring system is equipped with a piston cylinder and a displacement sensor for measuring the movement of the piston, and the measuring system is also equipped with a device that can prevent the piston from moving Piston system with broken rod.

The utility model is also characterized in that:

The piston system includes a measuring pillar installed in the measuring system, a piston cylinder is installed in the cylinder hole of the measuring pillar, a piston rod is inserted in the center of the piston cylinder, and an anti-break elastic block is installed outside the top of the piston rod.

The pressure gauge further includes a bottom plate, and a pressurized oil cylinder and a hydraulic oil tank for supplying oil to the pressurized oil cylinder are arranged inside the bottom plate. Stop valve, hand pump, pressurized hand wheel, oil cup, among which the unloading valve, stop valve and oil cup are all connected with the pressurized oil cylinder, the pressurized oil cylinder is connected with the hand pump, and the pressurized piston in the pressurized oil cylinder is also connected The screw is connected with the pressurized handwheel, the meter base is connected with the high-pressure outlet of the pressurized oil cylinder, and the corresponding weight is set on the outer surface of the measuring system.

A piston shut-off valve is also arranged on the surface of the bottom plate, and the piston shut-off valve is connected with the piston cylinder in the measuring system.

The measuring system is connected with the output shaft of the motor, and the rotation is controlled by the motor, and the motor is opened and closed by the motor switch.

The surface of the base plate is also provided with an electronic display system, which is connected with the measuring system, and the four corners of the lower surface of the base plate are provided with leveling screws.

The beneficial effects of the utility model are: an improved piston pressure gauge of the utility model, by redesigning the piston system, adding an anti-break elastic block to the measurement system, effectively solves the problem of the piston pressure of the piston pressure gauge in the prior art. The problem that the rod is easy to break.

Description of drawings

Fig. 1 is the schematic diagram of the main view structure of an improved piston pressure gauge of the present invention;

Fig. 2 is a top view structural schematic diagram of an improved piston pressure gauge of the present invention;

Fig. 3 is a structural schematic diagram of the piston system in an improved piston pressure gauge of the present invention.

In the figure, 1. Table seat, 2. Hand pump, 3. Stop valve, 4. Leveling screw, 5. Pressurized handwheel, 6. Motor, 7. Electronic display system, 8. Weight, 9. Measurement System, 10. Unloading valve, 11. Piston stop valve, 12. Bottom plate, 13. Tested pressure gauge, 14. Motor switch, 15. Spirit level, 16. Oil cup, 17. Pressurized oil cylinder, 18. Piston cylinder, 19. piston rod, 20. anti-breaking elastic block, 21. measuring pillar.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

An improved piston pressure gauge of the utility model, as shown in Figure 1 and Figure 2, includes a measurement system 9, the inside of the measurement system 9 is provided with a piston cylinder and a displacement sensor for measuring the movement of the piston, and the measurement system 9 is also A piston system that prevents the piston rod from breaking is provided.

The pressure gauge further includes a base plate 12, the inside of the base plate 12 is provided with a pressurized oil cylinder 17 and a hydraulic oil tank for supplying oil to the pressurized oil cylinder 17, the measuring system 9 is arranged on the surface of the base plate 12, and the surface of the base plate 12 is also provided with a table seat respectively. 1. Spirit level 15, unloading valve 10, stop valve 3, hand pump 2, pressure hand wheel 5, oil cup 16, wherein unloading valve 10, stop valve 3 and oil cup 16 are all connected with pressurized oil cylinder 17, Pressurized oil cylinder 17 is communicated with hand pump 2, and the pressurized piston in pressurized oil cylinder 17 is also connected with pressurized hand wheel 5 through lead screw, and gauge seat 1 is communicated with the high-pressure outlet of pressurized oil cylinder 17, and the external of measuring system 9 Corresponding weight 8 is set on the hanging orchid on the surface. A piston shut-off valve 11 is also provided on the surface of the base plate 12 , and the piston shut-off valve 11 is connected with the piston barrel in the measuring system 9 . The measuring system 9 is connected with the output shaft of the motor 6 and is controlled by the motor 6 to rotate, and the motor 6 is opened and closed by the motor switch 14 . The surface of the base plate 12 is also provided with an electronic display system 7 connected to the measurement system 9 , and the four corners of the lower surface of the base plate 12 are provided with leveling screws 4 .

As shown in Figure 3, the piston system includes a measuring pillar 21 installed in the measuring system 9, a piston cylinder 18 is installed in the cylinder hole of the measuring pillar 21, a piston rod 19 is inserted in the center of the piston cylinder 18, and the top of the piston rod 19 Anti-break elastic block 20 is installed on the outside.

The working principle of the utility model is as follows:

Install the pressure gauge 13 to be calibrated and measured on the gauge base 1, first close the unloading valve 10, open the stop valve 3, the piston stop valve 11, shake the hand pump 2, and pressurize the pressurizing cylinder 17 at the first stage, and the pressure It can reach 5MPa; then close the stop valve 3, and then turn the pressure handwheel 5 to pressurize the pressure cylinder 17 in two stages, and the pressure can reach 250MPa; after adding the corresponding weight 8 according to the verification point, turn on the motor 6, and at the same time Start the displacement measurement part, indicate the up and down displacement of the measurement system 9 through the electronic display system 7, and adjust the secondary pressure value and the zero position of the pressure gauge to be calibrated to make the electronic display system 7 indicate near the zero position, that is The pressure gauge error can be verified. Open the unloading valve 10 at the end of the verification to unload the pressure system.

The utility model has the advantages of: first, by redesigning the piston system, an anti-break elastic block is installed, which effectively avoids the situation that the piston rod is easily broken; second, the stability of the electric system is enhanced, and the rotation of the weight is more stable. However, the weight of the existing pressure gauge shakes by 2-3 mm, which will not only cause unstable indication, but also easily break the piston rod when the swing is too large; third, the pressurization system is further upgraded, with a stable structure and simple operation.

The pressure gauge of the utility model conforms to the following relevant national regulations and related documents: JJG59-2007 "Verification Regulations for Piston Pressure Gauge" of the People's Republic of China, JJF1001-1998 "General Measurement Terms and Definitions", OIMLR 110-1994Pressure Balance (Pressure Balance International Suggestion), People's Republic of China JJG99-2006 "Weight Verification Regulations". The pressure gauge of the utility model has the advantages of simple structure, stable and convenient pressurization, and high reliability of numerical value transmission.

Claims (6)

1. a kind of improving piston type pressure gauge, including measuring system (9), measuring system (9) be internally provided with piston cylinder and Displacement transducer for measuring piston movement, it is characterised in that being additionally provided with measuring system (9) can prevent piston rod from breaking The piston system split.

2. a kind of improving piston type pressure gauge according to claim 1, it is characterised in that the piston system includes peace Piston cylinder (18), piston are installed in measurement pillar (21) in the measuring system (9), the cylinder holes of measurement pillar (21) The center of cylinder (18) is fitted with piston rod (19), and the top outer of piston rod (19) is provided with anti-breaking elastomer block (20).

3. a kind of improving piston type pressure gauge according to claim 1, it is characterised in that the pressure gauge is also further wrapped Bottom plate (12) is included, bottom plate (12) is internally provided with pressurization oil cylinder (17) and the hydraulic oil container to pressurization oil cylinder (17) fuel feeding, described Measuring system (9) is arranged on the surface of bottom plate (12), the surface of bottom plate (12) be also respectively provided with gauge stand (1), level meter (15), Unloading valve (10), stop valve (3), handlance (2), pressurization handwheel (5), wherein lubricating cup (16), unloading valve (10), stop valve (3) And lubricating cup (16) is connected with pressurization oil cylinder (17), pressurization oil cylinder (17) is connected with handlance (2), adding in pressurization oil cylinder (17) Pressure piston is also connected by leading screw with pressurization handwheel (5), and the gauge stand (1) connects with the high-pressure outlet of pressurization oil cylinder (17), institute State and corresponding counterweight (8) is set on the outer surface extension orchid of measuring system (9).

4. a kind of improving piston type pressure gauge according to claim 3, it is characterised in that the surface of the bottom plate (12) Piston stop valve (11) is additionally provided with, piston stop valve (11) is connected with the piston cylinder in measuring system (9).

5. a kind of improving piston type pressure gauge according to claim 3, it is characterised in that the measuring system (9) with The output shaft connection of motor (6) is controlled to rotate by motor (6), and motor (6) is controlled to be opened and closed by motor switch (14).

6. according to a kind of improving piston type pressure gauge described in claim 3, it is characterised in that the surface of the bottom plate (12) is also Electronic display system (7) is provided with, electronic display system (7) is connected with the measuring system (9), the lower surface four of bottom plate (12) Angle is provided with levelling bolt (4).