CN219121919U

CN219121919U - Water pressure test equipment of gas cylinder

Info

Publication number: CN219121919U
Application number: CN202223203879.9U
Authority: CN
Inventors: 王利民; 陈彦飞; 宋明伟; 石远发
Original assignee: Sinoma Science and Technology Suzhou Co Ltd
Current assignee: Sinoma Science and Technology Suzhou Co Ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-06-02
Anticipated expiration: 2032-12-01

Abstract

The utility model discloses water pressure test equipment for a gas cylinder, which is provided with an electric contact pressure gauge, a shock-resistant pressure gauge, a precision pressure gauge, a pressure transmitter, a high-pressure one-way valve, a pressure relief valve, pipelines and bottle mouth connectors for butt joint of the gas cylinder, wherein each pressure gauge is connected to the middle section of the pipeline, one end of the pipeline is in butt joint with the gas cylinder through the bottle mouth connectors, and the other end of the pipeline is in shunt butt joint with a water outlet and a pressure relief port of the high-pressure pump. Specifically, the top side of the bottleneck connecting piece is provided with a second interface of a butt-joint pressure transmitter beside the first interface of the butt-joint pipeline, the bottom side of the bottleneck connecting piece is provided with a water inlet communicated with the inner cavity of the gas cylinder and the two interfaces, and the pressure transmitter is connected to the second interface closest to the inner cavity of the gas cylinder to test the internal pressure of the gas cylinder. Through the structural improvement of the water pressure test equipment, the pressure of the test pipeline is converted into the pressure of the inner cavity of the test gas cylinder, the accuracy of the internal pressure acquisition of the product can be improved, and a stable boosting curve and a stable pressure change trend are obtained.

Description

Water pressure test equipment of gas cylinder

Technical Field

The utility model relates to quality inspection equipment of a high-pressure gas cylinder, in particular to an improvement of equipment structure for carrying out water pressure test on a high-capacity gas cylinder.

Background

With the global environmental protection requirement increasing, natural gas and hydrogen are emerging energy sources with low pollution or zero pollution to be further developed and utilized. In order to more conveniently apply these new energy sources to industrial production, related gas cylinders have been developed, and in particular, high-pressure gas cylinders matched with industrial applications have been developed. The high-pressure gas cylinder is used as a special high-pressure container, so that not only is a special production process and equipment required for producing the gas cylinder, but also a matched detection device is required for ensuring whether the gas cylinder meets the design specification parameters of corresponding standards. There are many areas to be improved for conventional hydraulic testing equipment (as shown in fig. 1) for large volume cylinders such as long tube trailers. For example, as shown in fig. 2, the fluctuation of the boost curve is large, the randomness of the data collected by the sensor and fed back to the computer system is large, the trend of the pressure curve during product testing is difficult to control, and the pressure maintaining is random.

Disclosure of Invention

Aiming at the defects of the existing water pressure test equipment on a pressure curve when pressure measurement is applied, the utility model aims to provide the water pressure test equipment for the gas cylinder, and the pressure curve trend is improved by local structural adjustment.

The technical solution for realizing the above purpose is that the hydraulic pressure test equipment of the gas cylinder is provided with an electric contact pressure gauge, a shock-resistant pressure gauge, a precision pressure gauge, a pressure transmitter, a high-pressure one-way valve, a pressure release valve, pipelines and bottle opening connectors for butt joint of the gas cylinder, wherein each pressure gauge is connected to the middle section of the pipeline, one end of the pipeline is in butt joint with the gas cylinder through the bottle opening connectors, and the other end of the pipeline is in shunt butt joint with a water outlet and a pressure release opening of the high-pressure plunger pump, and the hydraulic pressure test equipment is characterized in that: the top side of bottleneck connecting piece has seted up the second interface of butt joint pressure transmitter near the first interface of butt joint pipeline, and the bottom side of bottleneck connecting piece is equipped with the water inlet of intercommunication gas cylinder inner chamber and two interfaces, pressure transmitter meets in the second interface department that is closest to the gas cylinder inner chamber, tests the gas cylinder internal pressure.

Further, one main branch of the pipeline is connected with the outlet of the high-pressure plunger pump through a high-pressure one-way valve, and one auxiliary branch of the pipeline is connected with the pressure relief opening through a pressure relief valve.

Further, the electric contact pressure gauge, the vibration-resistant pressure gauge and the precision pressure gauge are all connected to the water outlet side of the main branch close to the high-pressure one-way valve.

Still further, be equipped with another shock-resistant manometer that establishes ties with the relief valve in the collateral branch road.

The water pressure test equipment provided by the utility model has the following technical effects and advantages: through the structural improvement of the water pressure test equipment, the pressure of the test pipeline is converted into the pressure of the inner cavity of the test gas cylinder, the accuracy of the internal pressure acquisition of the product can be improved, and a stable boosting curve and a stable pressure change trend are obtained.

Drawings

Fig. 1 is a schematic diagram of the connection and operation of components of the original hydraulic pressure test equipment.

Fig. 2 is a schematic diagram of the pressure curve trend of the original water pressure test equipment for testing.

FIG. 3 is a schematic diagram of the connection and operation of the components of the improved hydraulic test apparatus of the present utility model.

Fig. 4 is a schematic axial sectional view of a bottle mouth connector used in the hydraulic pressure testing apparatus shown in fig. 3.

Fig. 5 is a schematic diagram showing the pressure curve trend of the water pressure test device shown in fig. 3.

Detailed Description

The following detailed description of the embodiments of the present utility model is provided with reference to the accompanying drawings, so that the technical scheme of the present utility model is easier to understand and grasp, and the protection scope of the present utility model is defined more clearly.

In order to improve the efficiency of the water pressure test procedure, the repeated labor is reduced, the water pressure curve diagram is improved, and the accuracy of the detection result of the equipment is improved. The designer of the utility model provides an improved assumption in terms of a connecting structure aiming at the current water pressure testing equipment of the large-volume gas cylinder, and innovatively provides water pressure testing equipment with better testing effect. Taking fig. 1 as a reference example, as shown in fig. 3-4, the improved component connection and working principle diagram of the utility model is shown, and the axial section schematic diagram of the bottle mouth connector for carrying out structural design again is shown. It can be seen from the figure that the number and the type of the integral components of the water pressure testing device 2 are not greatly changed, and the water pressure testing device is provided with an electric contact pressure gauge 21, a vibration-resistant pressure gauge 22, a precision pressure gauge 23, a pressure transmitter 24, a high-pressure one-way valve 25, a pressure release valve 26, a pipeline 27 and a bottle mouth connecting piece for butt joint of the gas bottle 1. And each manometer is connected to the pipeline middle section, and pipeline one end is through bottleneck connecting piece and 1 butt joint of gas cylinder, and the other end branching butt joint high pressure plunger pump outlet 3 and pressure release mouth 4. In contrast to the conventional test device shown in fig. 1, in particular the bottle neck connection 28a is single-axis, i.e. only the central axis which runs through is used for the line connection to the gas cylinder, except for the sealing engagement enclosed by the bottle neck. In the improved testing device shown in fig. 3, the top side of the bottle opening connector 28B is eccentrically provided with a first interface a of a butt joint pipeline, a second interface B of a butt joint pressure transmitter 24 is arranged beside the first interface a, and the bottom side of the bottle opening connector 28B is provided with a water inlet C communicated with the inner cavity of the gas cylinder 1 and the two interfaces, so that the pressure transmitter can be connected with the second interface B nearest to the inner cavity of the gas cylinder to directly test the internal pressure of the gas cylinder.

In a refinement, one main branch of the pipeline 27 is abutted to the water outlet 3 of the high-pressure pump through the high-pressure one-way valve 25 and used for controlling water filling of the gas cylinder to be tested so as to test pressure resistance and leakage resistance; and one side branch of the pipeline 27 is connected with the pressure relief opening 4 in a butt joint way through the pressure relief valve 26 so as to drain water and reduce pressure after the water pressure test is finished. From the distribution of pressure collection points, the electric contact pressure gauge 21, a shock-resistant pressure gauge 22a and the precision pressure gauge 23 are all connected to the water outlet side of the main branch close to the high-pressure one-way valve 25. And another shock-resistant pressure gauge 22b connected in series with the relief valve 26 is also provided in the secondary branch.

The improvement of the hydraulic pressure testing device is shown by comparing fig. 1 and 3, wherein the detection position of the pressure transmitter is moved from the pipeline to the bottle mouth of the gas bottle, and the pressure of the testing pipeline is converted into the pressure of the inner cavity of the testing product. Thereby enabling accurate collection of internal pressure, not line pressure. The pressure of the pipeline is changed along with the change of the water input quantity of the high-pressure plunger pump, the pressure change process is that the water injection quantity of the pump is firstly and rapidly increased, the pressure of the pipeline is slowly reduced after reaching a peak value along with the dilution of the pressure container at the end of the pipeline, and the pressure curve of the whole test process is that the pressure curve shows the wave-like rise along with the increase of the water input quantity. However, if the pressure in the inner cavity of the product is tested, the pressure after dilution of the whole system is linearly increased along with the increase of the water inflow, and the pressure boosting trend is stable.

See the pressure profile shown in fig. 2 and 5, respectively. The fluctuation of the boosting curve before transformation is large, and the pressure maintaining test is difficult to be carried out in the pressure range specified by the process; the pressure-increasing curve obtained by carrying out the water pressure test on the gas cylinder after the equipment is modified is very stable, and is beneficial to controlling the pressure curve trend of the product, thereby being convenient for carrying out the pressure-maintaining test within the pressure range specified by the process (only the output amplitude of the high-pressure one-way valve is required to be finely adjusted).

In summary, the description of the solution and the detailed embodiments of the hydraulic testing device of the present utility model show that the solution has substantial characteristics and improvements: through combining the transposition of pressure transmitter to bottleneck connecting piece's structural modification and shifting, from test pipeline pressure conversion to test gas cylinder inner chamber pressure, can improve the accuracy of product internal pressure collection, obtain comparatively steady curve and pressure variation trend of stepping up.

In addition to the above embodiments, other embodiments of the present utility model are possible, and all technical solutions formed by equivalent substitution or equivalent transformation are within the scope of the present utility model as claimed.

Claims

1. The utility model provides a water pressure test equipment of gas cylinder, is equipped with electric contact manometer, shock-resistant manometer, accurate manometer, pressure transmitter, high-pressure check valve, relief valve, pipeline and dock the bottleneck connecting piece of gas cylinder, and each manometer is all connected to the pipeline middle section, and pipeline one end is through bottleneck connecting piece and gas cylinder butt joint, and the other end branching butt joint high-pressure plunger pump delivery port and relief vent, its characterized in that: the top side of bottleneck connecting piece has seted up the second interface of butt joint pressure transmitter near the first interface of butt joint pipeline, and the bottom side of bottleneck connecting piece is equipped with the water inlet of intercommunication gas cylinder inner chamber and two interfaces, pressure transmitter meets in the second interface department that is closest to the gas cylinder inner chamber, tests the gas cylinder internal pressure.

2. The water pressure testing apparatus of a gas cylinder according to claim 1, wherein: one main branch of the pipeline is connected with the water outlet of the high-pressure plunger pump through a high-pressure one-way valve, and one auxiliary branch of the pipeline is connected with the pressure relief opening through a pressure relief valve.

3. The water pressure testing apparatus of a gas cylinder according to claim 2, wherein: the electric contact pressure gauge, the vibration-resistant pressure gauge and the precision pressure gauge are all connected to the water outlet side of the main branch close to the high-pressure one-way valve.

4. The water pressure testing apparatus of a gas cylinder according to claim 2, wherein: and the auxiliary branch is internally provided with another shock-resistant pressure gauge connected with the pressure release valve in series.