Water pressure testing machine for gas cylinder

Abstract

The utility model provides a gas cylinder hydrostatic testing machine which comprises a containing mechanism, a control mechanism, a measuring mechanism and an adjusting seat, a containing cavity used for containing a gas cylinder is formed in the containing mechanism, and the control mechanism is communicated with the containing cavity and used for injecting water into the containing cavity; the measuring mechanism is communicated with the gas cylinder and used for injecting pressurized liquid into the gas cylinder, the measuring mechanism comprises a measuring cup, a connecting pipe and a balance, one end of the connecting pipe is communicated with the containing cavity, the other end of the connecting pipe extends into the measuring cup, the measuring cup is borne on the balance and used for bearing water overflowing from the containing cavity when the pressurized liquid is injected into the gas cylinder, and the adjusting seat is connected with the measuring mechanism. The length adjusting device is used for adjusting the length of the connecting pipe in the measuring cup to be a preset value so as to prevent the buoyancy of the connecting pipe from being influenced by a water body, thereby improving the measurement precision of the gas cylinder hydrostatic testing machine on the residual deformation rate of the gas cylinder.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gas cylinder water pressure detection, and more particularly relates to a gas cylinder water pressure testing machine. BACKGROUND

[0002] With the increasingly wide use of pressure vessels in industrial production processes, especially in the safe use of pressure vessels such as gas cylinders and steel cylinders, the detection and quality control of pressure vessels become particularly important. Especially for containers carrying high-pressure gas, it is crucial to ensure their safety. Therefore, the detection standards for pressure vessels are becoming increasingly stringent, and traditional detection methods are gradually revealing some limitations.

[0003] Currently, the water pressure test method is one of the important means for detecting pressure vessels, among which the internal measurement method water pressure testing machine is widely used in the detection of pressure vessels. The internal measurement method water pressure testing machine mainly simulates the working condition of the gas cylinder under high pressure through the pressure control system and the water jacket structure, tests its pressure resistance and deformation condition. Its working principle is to pressurize the pressure vessel through the pressure control console, fill the water jacket with water and maintain a sealed state, so as to reflect the deformation degree of the gas cylinder by observing the discharge and return amount of water in the water jacket.

[0004] The internal measurement method water pressure testing machine is usually composed of the following parts: pressure control console, water jacket, balance, measuring cup, etc. The water jacket is filled with water, the gas cylinder is connected with the water jacket cover, and the pressure pipe connects the pressure control console with the water jacket cover. When pressure is applied through the pressure control console, the gas cylinder deforms and expands, causing the water in the water jacket to be discharged into the measuring cup. When pressure is released, the gas cylinder contracts and sucks the water in the measuring cup into the water jacket.

[0005] The problem with the above technical solution is that the measuring cup is connected to the water jacket through a water pipe, and the water pipe inserted into the water in the measuring cup has a buoyancy effect, which increases the error. Especially in the detection task of high-precision calibration of steel cylinders, the buoyancy effect of water will cause the difference between the actual discharged water and the measured water, so that the real deformation of the gas cylinder cannot be accurately judged, and the measurement accuracy needs to be improved. SUMMARY

[0006] The purpose of the embodiment of the application is to provide a gas cylinder water pressure testing machine to solve the technical problems existing in the prior art.

[0007] To achieve the above purpose, the technical solution adopted by the application is to provide a gas cylinder water pressure testing machine, which comprises:

[0008] The accommodating mechanism is internally provided with an accommodating cavity for placing the gas cylinder;

[0009] A control mechanism, connected to the accommodating cavity, is used to inject water into the accommodating cavity; and connected to the gas cylinder, is used to inject pressurized liquid into the gas cylinder.

[0010] The measuring mechanism includes a measuring cup, a connecting tube, and a balance. One end of the connecting tube is connected to the accommodating cavity, and the other end extends into the measuring cup. The measuring cup is supported on the balance and is used to collect water overflowing from the accommodating cavity when pressurized liquid is injected into the gas cylinder.

[0011] An adjustment seat, connected to the measuring mechanism, is used to adjust the length of the connecting tube inside the measuring cup to a preset value during measurement.

[0012] Optionally, an initial value scale line is provided on one end of the connecting tube extending into the measuring cup, and the adjusting seat is used to adjust the initial value scale line to coincide with the liquid level line in the measuring cup during measurement.

[0013] Optionally, the adjustment seat is located below the balance and is used to drive the balance to move the measuring cup vertically relative to the connecting tube.

[0014] Optionally, the adjusting seat is connected to the connecting tube and is used to drive one end of the connecting tube extending into the measuring cup to move vertically relative to the measuring cup.

[0015] Optionally, the adjustment seat is fixedly connected to the control mechanism or is a separate unit.

[0016] Optionally, it also includes:

[0017] Support frame;

[0018] When the adjustment seat and the control mechanism are separately configured, the adjustment seat is placed on the support frame.

[0019] Optionally, the support frame is provided with a support plate;

[0020] When the adjusting seat is connected to the connecting pipe, the adjusting seat is supported on the connecting plate.

[0021] The beneficial effects of the gas cylinder hydrostatic testing machine provided in this application are as follows: Compared with the prior art, the gas cylinder hydrostatic testing machine provided in this application includes a accommodating mechanism, a control mechanism, a measuring mechanism, and an adjusting seat. The accommodating mechanism has an accommodating cavity for placing the gas cylinder. The control mechanism is connected to the accommodating cavity and is used to inject water into the accommodating cavity; it is also connected to the gas cylinder and is used to inject pressurized liquid into the gas cylinder. The measuring mechanism includes a measuring cup, a connecting tube, and a balance. One end of the connecting tube is connected to the accommodating cavity, and the other end extends into the measuring cup. The measuring cup is supported on the balance and is used to catch the water overflowing from the accommodating cavity when pressurized liquid is injected into the gas cylinder. The adjusting seat is connected to the measuring mechanism and is used to adjust the length of the connecting tube inside the measuring cup to a preset value during measurement to prevent the buoyancy of the water on the connecting tube from affecting the measurement results, thereby improving the measurement accuracy of the gas cylinder hydrostatic testing machine for the residual deformation rate of the gas cylinder. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the gas cylinder hydrostatic testing machine provided in the embodiments of this application;

[0024] Figure 2 This is a schematic diagram showing the position of the connecting pipe when it is located below the liquid surface by a dimension h1.

[0025] Figure 3 This is a schematic diagram showing the position of the connecting pipe when it is located below the liquid surface by a dimension of h2.

[0026] Figure 4 A schematic diagram showing the position of the connecting tube below the liquid surface when reading the first value;

[0027] Figure 5 This is a schematic diagram showing the position of the connecting pipe when it is located below the liquid surface by a dimension h3.

[0028] Figure 6 This is a schematic diagram showing the position of the connecting tube below the liquid surface when reading the second value.

[0029] Figure 7 This is a schematic diagram of the structure of the adjustment seat provided in this application;

[0030] Figure 8 This is a schematic diagram of the structure of a gas cylinder hydrostatic testing machine provided in another embodiment of this application;

[0031] Figure 9 This is a schematic diagram showing the position of the connecting pipe with a dimension h1 below the liquid surface in another embodiment;

[0032] Figure 10 This is a schematic diagram showing the position of the connecting pipe when its dimension is h2 below the liquid surface in another embodiment;

[0033] Figure 11 This is a schematic diagram showing the position of the connecting tube below the liquid surface when reading the first value in another embodiment;

[0034] Figure 12 This is a schematic diagram showing the position of the connecting pipe when it is located below the liquid surface in another embodiment, with a dimension of h3.

[0035] Figure 13 This is a schematic diagram showing the position of the connecting tube below the liquid surface when reading the second value in another embodiment.

[0036] The following are the labeling elements in the figure:

[0037] 10. Containing mechanism; 11. Water jacket; 111. Containing cavity; 12. Water jacket cover; 13. Pressurization port; 14. First drain valve; 15. Second drain valve; 20. Control mechanism; 21. Operating table; 30. Measuring mechanism; 31. Measuring cup; 32. Connecting pipe; 321. Initial value scale line; 33. Balance; 34. Hose; 40. Adjusting seat; 41. Base; 42. Lifting plate; 43. Adjusting screw; 44. Drive screw; 45. Drive nut; 50. Gas cylinder; 60. Support frame; 61. Support plate. Detailed Implementation

[0038] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0039] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0040] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0042] Please refer to the following: Figures 1 to 13 The gas cylinder 50 hydrostatic testing machine provided in the embodiments of this application will now be described.

[0043] Please refer to a 50-liter hydraulic pressure testing machine for gas cylinders. Figure 1 It includes a housing mechanism 10, a control mechanism 20, a measuring mechanism 30, and an adjustment seat 40.

[0044] Specifically, the containing mechanism 10 has a containing cavity 111 for placing the gas cylinder 50. The control mechanism 20 is connected to the containing cavity 111. After the gas cylinder 50 is placed in the containing cavity 111 and the containing cavity 111 is sealed, the control mechanism 20 injects water into the containing cavity 111. Simultaneously, the control mechanism 20 is also connected to the gas cylinder 50. After the gas cylinder 50 is placed in the containing cavity 111, the control mechanism 20 injects pressurized liquid into the gas cylinder 50.

[0045] The measuring mechanism 30 includes a measuring cup 31, a connecting tube 32, and a balance 33. One end of the connecting tube 32 is connected to the accommodating cavity 111, and the other end extends into the measuring cup 31. The measuring cup 31 is supported on the balance 33. The measuring cup 31 is used to collect the water overflowing from the accommodating cavity 111 when pressurized liquid is injected into the gas cylinder 50.

[0046] The adjusting seat 40 is connected to the measuring mechanism 30 and is used to adjust the length of the connecting tube 32 inside the measuring cup 31 to a preset value during measurement.

[0047] Please see Figure 2 and Figure 9After the container 111 is filled with water, as the control mechanism 20 continues to inject water into the container 111, some water overflows from the connecting tube 32 into the measuring cup 31. When one end of the connecting tube 32 in the measuring cup 31 is submerged below the liquid surface, the control mechanism 20 stops injecting water into the container 111. At this time, the length of the connecting tube 32 below the liquid surface in the measuring cup 31 is recorded and set as a preset value. The water level in the measuring cup 31 is set to 200 ml, and the preset value of the connecting tube 32 below the liquid surface in the measuring cup 31 is h1. At this time, the reading on the balance 33 is zeroed.

[0048] Please see Figure 3 and Figure 10 Subsequently, the control mechanism 20 injects pressurized liquid into the gas cylinder 50. Under the pressure of the pressurized liquid, the gas cylinder 50 expands. After expansion, the volume of the gas cylinder 50 discharges the water in the accommodating cavity 111 and enters the measuring cup 31 through the connecting pipe 32. At this time, the water level in the measuring cup 31 rises, and the dimension of the connecting pipe 32 below the liquid surface in the measuring cup 31 changes. The dimension of the connecting pipe 32 below the liquid surface in the measuring cup 31 at this time is set as h2.

[0049] Please see Figure 4 and Figure 11 Then adjust the adjusting seat 40 to adjust the position between the measuring cup 31 and the end of the connecting tube 32 inside the measuring cup 31, so that the dimension of the connecting tube 32 below the liquid surface inside the measuring cup 31 returns to h1, and record the first value on the balance 33.

[0050] Please see Figure 5 and Figure 12 Then, the pressure relief valve connected to the gas cylinder 50 is opened to make the gas pressure in the gas cylinder 50 equal to the atmospheric pressure. At this time, the gas cylinder 50 will contract. Since the accommodating cavity 111 is in a sealed state and the end of the connecting tube 32 located in the measuring cup 31 is immersed below the liquid surface, under the action of the pressure difference inside and outside the accommodating cavity 111, some of the water in the measuring cup 31 flows back into the accommodating cavity 111, the water level in the measuring cup 31 drops, and the size of the connecting tube 32 below the liquid surface in the measuring cup 31 changes. The size of the connecting tube 32 below the liquid surface in the measuring cup 31 at this time is set as h3.

[0051] Please see Figure 6 and Figure 13 Then continue to adjust the adjusting seat 40 to adjust the position between the measuring cup 31 and the end of the connecting tube 32 inside the measuring cup 31, and ensure that the dimension of the connecting tube 32 below the liquid surface inside the measuring cup 31 returns to h1, and record the second value on the balance 33.

[0052] It should be noted that due to the deformation of gas cylinder 50 after the pressurization test, the water level in measuring cup 31 corresponding to the second value is higher than the initial water level, that is, the water level in measuring cup 31 is higher than 200 ml at this time.

[0053] Then, based on the ratio of the second value to the first value, it is determined whether the gas cylinder 50 is qualified. If the ratio of the second value / the first value * 100% is less than 5%, the deformation of the gas cylinder 50 is qualified; otherwise, it is unqualified.

[0054] When obtaining the first and second values, since the dimension of the connecting tube 32 below the liquid surface in the measuring cup 31 is h1 by adjusting the seat 40, the influence of the buoyancy generated by the water on the part of the connecting tube 32 below the liquid surface in the measuring cup 31 on the measurement results is prevented, thereby improving the accuracy of measuring the residual deformation rate of the gas cylinder 50.

[0055] Compared with the prior art, the gas cylinder 50 hydrostatic testing machine provided in this application includes a housing mechanism 10, a control mechanism 20, a measuring mechanism 30, and an adjusting seat 40. The housing mechanism 10 has a housing cavity 111 for placing the gas cylinder 50. The control mechanism 20 is connected to the housing cavity 111 for injecting water into the housing cavity 111 and is connected to the gas cylinder 50 for injecting pressurized liquid into the gas cylinder 50. The measuring mechanism 30 includes a measuring cup 31, a connecting pipe 32, and a balance 33. One end of the connecting pipe 32... The measuring cup 31 is connected to the accommodating cavity 111 and extends into the measuring cup 31. The measuring cup 31 is supported on the balance 33. The measuring cup 31 is used to collect the water overflowing from the accommodating cavity 111 when pressurized liquid is injected into the gas cylinder 50. The adjusting seat 40 is connected to the measuring mechanism 30 and is used to adjust the length of the connecting tube 32 inside the measuring cup 31 to a preset value during measurement to prevent the buoyancy of the connecting tube 32 from affecting the measurement results, thereby improving the accuracy of the residual deformation rate of the gas cylinder 50 by the gas cylinder 50 hydrostatic testing machine.

[0056] In one embodiment of this application, such as Figures 2 to 6 An initial value scale line 321 is provided on one end of the connecting tube 32 extending into the measuring cup 31. After the accommodating cavity 111 is filled with water, as the control mechanism 20 continues to inject water into the accommodating cavity 111, some water overflows from the connecting tube 32 into the measuring cup 31. When the initial value scale line 321 is level with the liquid level in the measuring cup 32, the control mechanism 20 stops injecting water into the accommodating cavity 111. At this time, the length of the connecting tube 32 below the liquid level in the measuring cup 31 is h1. During subsequent measurements, the adjusting seat 40 is used to adjust the initial value scale line 321 to coincide with the liquid level line in the measuring cup 31.

[0057] An initial value scale line 321 is provided on one end of the connecting tube 32 extending into the measuring cup. By aligning the initial value scale line 321 with the liquid level in the measuring cup 31, the operator can quickly adjust the end of the connecting tube 32 extending into the measuring cup 31 to the preset value.

[0058] In this application, please refer to Figure 1 and Figure 8 The containing mechanism 10 includes a water jacket 11 and a water jacket cover 12. The water jacket 11 has a containing cavity 111, and the water jacket cover 12 is detachably connected to the water jacket 11 to seal the containing cavity 111. The water jacket cover 12 has a pressurization port 13. After the gas cylinder 50 is connected to the pressurization port 13, it is contained in the containing cavity 111. The pressurization port 13 has a first drain valve 14. When the first drain valve 14 is opened, it is used to discharge part of the pressurized liquid in the gas cylinder 50, so that the pressure in the gas cylinder 50 is equal to the atmospheric pressure. The water jacket cover 12 has a second drain valve 15, which is used to discharge the water in the containing cavity 111 after water is injected into it. When the length of the end of the connecting pipe 32 extending into the measuring cup 31 below the liquid surface reaches a preset value, the second drain valve 15 is closed to prevent water from continuing to flow out.

[0059] Please see Figure 1 and Figure 8 The control mechanism 20 includes an operating panel 21, a water injection pump, and a booster pump. The water injection pump is connected to the accommodating cavity 111 via a water injection pipe, and the booster pump is connected to the pressurization interface 13 via a pressurization pipe. The operating panel 21 is equipped with a water injection switch for controlling the opening and closing of the water injection pump, and a booster switch for controlling the opening and closing of the booster pump. A pressure gauge or pressure sensor is installed on the pressurization pipe to shut off the booster pump when the pressure inside the gas cylinder 50 reaches a preset pressure.

[0060] In this application, please refer to Figure 7 The adjusting seat 40 includes a base 41, a lifting plate 42, an adjusting screw 43, a driving screw 44, and a driving nut 45. The adjusting screw 43 extends horizontally and is rotatably connected to the base 41. The driving screw 44 extends vertically, with one end rotatably connected to the base 41 and the other end rotatably connected to the lifting plate 42. The driving screw 44 and the adjusting screw 43 are driven by a bevel gear or worm gear structure. The driving nut 45 is threadedly connected to the driving screw 44 and fixedly connected to the lifting plate 42. The lifting plate 42 is slidably connected to the base 41 in the vertical direction. The lifting plate 42 can be moved vertically by rotating the adjusting screw 43.

[0061] In one embodiment of this application, please refer to Figures 1 to 6The adjusting seat 40 is located below the balance 33. In this technical solution, the adjusting seat 40 drives the balance 33 to move the measuring cup 31 in the vertical direction relative to the connecting tube 32, thereby adjusting the dimension of the connecting tube 32 below the liquid surface in the measuring cup 31 to h1.

[0062] In another embodiment of this application, please refer to Figures 8 to 13 The adjusting seat 40 is fixed to the lifting plate 42 in the adjusting seat 40 by the connecting piece. The connecting piece is connected to the connecting pipe 32. The end of the connecting pipe 32 near the water jacket 11 is connected to the accommodating cavity 111 by the flexible hose 34. The adjusting seat 40 drives the end of the connecting pipe 32 to extend into the measuring cup 31 and move vertically relative to the measuring cup 31 by the connecting piece. At the same time, since the end of the connecting pipe 32 near the water jacket 11 is connected to the accommodating cavity 111 by the flexible hose 34, the flexible hose 34 facilitates the movement of the connecting pipe 32 relative to the water jacket 11, thereby facilitating the movement of the end of the connecting pipe 32 extending into the measuring cup 31 vertically relative to the measuring cup 31.

[0063] In one embodiment of this application, the adjustment seat 40 is fixedly connected to the operating table 21 in the control mechanism 20.

[0064] In one embodiment of this application, the adjustment seat 40 and the operating table 21 in the control mechanism 20 are separately arranged.

[0065] Please see Figure 1 and Figure 8 When the adjusting seat 40 and the operating table 21 in the control mechanism 20 are set separately, the gas cylinder 50 hydrostatic testing machine also includes a support frame 60.

[0066] In one embodiment of this application, when the balance 33 is placed on the adjusting seat 40, that is, when the adjusting seat 40 drives the measuring cup 31 to move relative to the end of the connecting tube 32 extending into the measuring cup 31, the adjusting seat 40 is placed on the support frame 60.

[0067] In one embodiment of this application, please refer to Figures 8 to 13 When the adjusting seat 40 is connected to the connecting pipe 32, that is, when the adjusting seat 40 drives the end of the connecting pipe 32 to extend into the measuring cup 31 to move relative to the measuring cup 31, the support frame 60 is provided with a support plate 61, and the adjusting seat 40 is supported on the support plate 61. At this time, the balance 33 and the measuring cup 31 are set on the support frame 60.

[0068] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A gas cylinder water pressure testing machine, characterized in that, a containing mechanism, internally provided with a containing cavity for placing a gas cylinder; a control mechanism, in communication with the containing cavity, for injecting water into the containing cavity; in communication with the gas cylinder, for injecting pressurized liquid into the gas cylinder; a measuring mechanism, comprising a measuring cup, a connecting pipe and a balance, one end of the connecting pipe being in communication with the containing cavity, the other end extending into the measuring cup, the measuring cup being carried on the balance, the measuring cup being used to receive the water overflowing from the containing cavity when the pressurized liquid is injected into the gas cylinder; an adjusting seat, connected with the measuring mechanism, for adjusting the length of the connecting pipe in the measuring cup to a preset value during measurement.

2. The gas cylinder water pressure testing machine according to claim 1, characterized in that, an initial value scale line is provided on the end of the connecting pipe extending into the measuring cup, the adjusting seat being used to adjust the initial value scale line to coincide with the liquid level line in the measuring cup during measurement.

3. The gas cylinder water pressure testing machine according to claim 2, characterized in that, the adjusting seat is arranged below the balance, for driving the balance to move the measuring cup in the vertical direction relative to the connecting pipe.

4. The gas cylinder water pressure testing machine according to claim 2, characterized in that, the adjusting seat is connected with the connecting pipe, for driving the connecting pipe to move in the vertical direction relative to the measuring cup.

5. The gas cylinder water pressure testing machine according to claim 3 or 4, characterized in that, the adjusting seat is fixedly connected with the control mechanism or arranged separately.

6. The gas cylinder hydrostatic testing machine of claim 4, wherein, Further comprising: a support frame; when the adjusting seat is arranged separately from the control mechanism, the adjusting seat is placed on the support frame.

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