Automatic pressure test bench for pressure vessel
By designing an automatic pressure testing bench for pressure vessels, the gas can be reused between the workpieces to be tested by using pressurization pipes and connecting pipes, which solves the problem of gas waste after testing and improves testing efficiency and safety.
Patent Information
- Application Number
- CN202421982145.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-08-15
AI Technical Summary
In existing pressure vessel tests, the gas inside the tested pressure vessel is directly depressurized and discharged after the test, resulting in gas waste.
Design an automatic pressure testing bench for pressure vessels. The bench enables gas reuse through pressurization pipes and connecting pipes, and uses valves to control the flow of gas between different workpieces to be tested, preventing gas from being directly discharged outdoors.
This technology enables the reuse of gas inside the pressure vessel under test, reducing the waste of high-pressure gas and improving operational safety and testing efficiency.
Smart Images
Figure CN223565442U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of pressure detection, for example to an automatic pressure test bench for pressure vessels. BACKGROUND
[0002] In the production process of a pressure vessel, the strength and tightness of the pressure-bearing components of the pressure vessel need to be inspected. In the test process, whether the pressure vessel has the necessary pressure-bearing capacity for safe operation at the design pressure is verified by observing whether the pressure-bearing components have obvious deformation or rupture.
[0003] The existing pressure test of a pressure vessel is to install the pressure vessel to be tested on a test bench, manually turn a valve to pressurize the pressure vessel to be tested, and determine whether the pressure reaches the test pressure according to the pointer of a pressure gauge. Then, the valve is turned to release the pressure after a specified time.
[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
[0005] After the test is completed, the gas in the pressure vessel to be tested is directly discharged and cannot be effectively utilized, resulting in waste.
[0006] It should be noted that the information disclosed in the above BACKGROUND section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE INVENTION
[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine the key / important components or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.
[0008] The embodiments of the present disclosure provide an automatic pressure test bench for pressure vessels, which realizes the reuse of the gas in the pressure vessel to be tested and reduces waste.
[0009] In some embodiments, an automatic pressure test bench for pressure vessels includes a pressurizing pipe and a communication pipe. The pressurizing pipe is provided with a first valve for controlling the opening and closing of the pressurizing pipe. The communication pipe is in communication with the output end of the pressurizing pipe and has a first output end and a second output end. A second valve is arranged on the first output end, and a third valve is arranged on the second output end. The first output end can be in communication with a first workpiece to be detected to fill the first workpiece to be detected with gas. The second output end can be in communication with a second workpiece to be detected to fill the second workpiece to be detected with gas. In the case that the first valve is closed and the second valve and the third valve are both opened, the gas in the first workpiece to be detected and the second workpiece to be detected can be communicated with each other.
[0010] Optionally, the pressurizing pipe is provided with a first pressure sensor, and the first pressure sensor is located between the first valve and the input end of the pressurizing pipe.
[0011] Optionally, the first output end of the communication pipe is communicated with a first detection pipe, one end of the first detection pipe is a first pressure relief end, the first pressure relief end is provided with a first pressure relief valve, and the other end of the first detection pipe is a first gas charging end; wherein the first gas charging end is communicated with the first workpiece to be detected, and the first output end further charges the gas into the first workpiece to be detected through the first gas charging end of the first detection pipe.
[0012] Optionally, the first detection pipe is provided with a second pressure sensor, and the second pressure sensor is located between the first gas charging end and the first pressure relief valve.
[0013] Optionally, the second output end of the communication pipe is communicated with a second detection pipe, one end of the second detection pipe is a second pressure relief end, the second pressure relief end is provided with a second pressure relief valve, and the other end of the second detection pipe is a second gas charging end; wherein the second gas charging end is communicated with the second workpiece to be detected, and the second output end further charges the gas into the second workpiece to be detected through the second gas charging end of the second detection pipe.
[0014] Optionally, the second detection pipe is provided with a third pressure sensor, and the third pressure sensor is located between the second gas charging end and the second pressure relief valve.
[0015] Optionally, the automatic pressure test bench for pressure containers further comprises a buffer tank, the buffer tank is communicated with the input end of the pressurizing pipe, and the buffer tank has a gas inlet and a gas outlet, the gas inlet is provided with a gas inlet valve, and the gas outlet is provided with a gas outlet valve.
[0016] Optionally, the automatic pressure test bench for pressure containers further comprises a support frame, the buffer tank is arranged in the support frame, the input end of the pressurizing pipe is communicated with the buffer tank, and the output end of the pressurizing pipe extends out of the support frame through the support frame.
[0017] Optionally, the support frame is provided with a control console, and the control console is provided with a first pressure gauge, a second pressure gauge and a third pressure gauge; wherein the first pressure gauge is connected with the first sensor, the second pressure gauge is connected with the second sensor, and the third pressure gauge is connected with the third sensor.
[0018] The automatic pressure test bench for pressure containers provided by the embodiment of the present disclosure can achieve the following technical effects:
[0019] The first to be tested workpiece is connected to the first output end, and the first valve and the second valve are opened, and then high-pressure gas is sent into the first to be tested workpiece through the pressurizing pipe until the test pressure is reached, the first valve is closed, and the first to be tested workpiece is detected. After the detection of the first to be tested workpiece is completed, the second to be tested workpiece is connected to the second output end, the third valve is opened, and part of the gas in the first to be tested workpiece flows to the second to be tested workpiece. Then the second valve is closed, the first valve is opened, and then high-pressure gas is sent into the second to be tested workpiece through the pressurizing pipe until the test pressure is reached, the first valve is closed, and the second to be tested workpiece is detected. The gas after the test is avoided from being directly discharged outdoors, the gas in the pressure container to be tested is reused, and the waste of high-pressure gas is reduced.
[0020] The foregoing general description and the following description are only exemplary and explanatory, and are not used to limit the present application. BRIEF DESCRIPTION OF DRAWINGS
[0021] One or more embodiments are exemplarily illustrated by corresponding drawings, which are not used to limit the embodiments, elements with the same reference numerals in the drawings are shown as similar elements, the drawings do not constitute a proportional limit, and wherein:
[0022] Fig. 1 is a structural schematic diagram of a pressure container automatic pressure test platform provided by an embodiment of the present disclosure;
[0023] Fig. 2 is a structural schematic diagram of another pressure container automatic pressure test platform provided by an embodiment of the present disclosure;
[0024] Fig. 3 is a structural schematic diagram of another side of the pressure container automatic pressure test platform provided by an embodiment of the present disclosure.
[0025] Reference signs:
[0026] 100, pressurizing pipe; 110, first valve; 200, communication pipe; 210, first output end; 211, second valve; 220, second output end; 221, third valve; 310, first pressure sensor; 320, second pressure sensor; 330, third pressure sensor; 410, first detection pipe; 411, first pressure relief end; 412, first pressure relief valve; 413, first inflation end; 420, second detection pipe; 421, second pressure relief end; 422, second pressure relief valve; 423, second inflation end; 500, buffer tank; 510, air inlet; 520, air outlet; 530, air inlet valve; 540, air outlet valve; 600, support frame; 610, sliding groove; 620, control console; 621, first pressure gauge; 622, second pressure gauge; 623, third pressure gauge; 700, sliding frame; 800, driving member; 810, hydraulic cylinder. DETAILED DESCRIPTION
[0027] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, which are only used for reference and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, through multiple details, a sufficient understanding of the disclosed embodiments is provided. However, one or more embodiments can still be implemented without these details. In other cases, in order to simplify the drawings, well-known structures and devices can be simplified.
[0028] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.
[0029] In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to represent other meanings, for example, the term "upper" can also be used to represent a certain attachment relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the embodiments of the present disclosure can be understood according to the specific circumstances.
[0030] In addition, the terms "set", "connected", and "fixed" should be understood broadly. For example, "connected" can be fixed connection, detachable connection, or integral configuration; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium, or internal communication between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present disclosure according to the specific circumstances.
[0031] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.
[0032] In combination with Figs. 1-3 As shown in the drawings, the present disclosure provides an automatic pressure test bench for pressure vessels, comprising: a pressurizing pipe 100 and a communication pipe 200. The pressurizing pipe 100 is provided with a first valve 110 for controlling the opening and closing of the pressurizing pipe 100; the communication pipe 200 is in communication with the output end of the pressurizing pipe 100, and the communication pipe 200 has a first output end 210 and a second output end 220, the first output end 210 is provided with a second valve 211, and the second output end 220 is provided with a third valve 221; wherein the first output end 210 can be connected to a first to-be-detected workpiece, and the first to-be-detected workpiece is filled with gas, the second output end 220 can be connected to a second to-be-detected workpiece, and the second to-be-detected workpiece is filled with gas, in the case that the first valve 110 is closed and the second valve 211 and the third valve 221 are both opened, the gas in the first to-be-detected workpiece and the second to-be-detected workpiece can be communicated with each other.
[0033] The automatic pressure test bench for pressure vessels provided by the present disclosure is used to connect the first to-be-detected workpiece to the first output end 210, open the first valve 110 and the second valve 211, and then send high-pressure gas into the first to-be-detected workpiece through the pressurizing pipe 100 until the test pressure is reached, close the first valve 110, and detect the first to-be-detected workpiece. After the detection of the first to-be-detected workpiece is completed, the second to-be-detected workpiece is connected to the second output end 220, the third valve 221 is opened, and part of the gas in the first to-be-detected workpiece flows to the second to-be-detected workpiece. Then, the second valve 211 is closed and the first valve 110 is opened, and then high-pressure gas is sent into the second to-be-detected workpiece through the pressurizing pipe 100 until the test pressure is reached, the first valve 110 is closed, and the second to-be-detected workpiece is detected. The gas after the test is directly discharged to the outside, the gas in the measured pressure vessel is reused, and the waste of high-pressure gas is reduced.
[0034] It can be understood that after the second workpiece to be tested is tested, the remaining workpieces to be tested are alternately installed on the first output end 210 and the second output end 220 of the communication pipe 200, and then the workpieces are tested in cycles. In the case that the first valve 110 is closed and the second valve 211 and the third valve 221 are both opened, the first output end 210 and the second output end 220 are communicated, the gas in the pressure container to be tested is reused, and the waste of high-pressure gas is reduced.
[0035] Optionally, the first valve 110 is a straight-through stop valve. In this way, the manufacturing cost of the straight-through stop valve is relatively low, and the difficulty of maintenance and repair is also relatively low.
[0036] Optionally, the second valve 211 is a straight-through stop valve. In this way, the manufacturing cost of the straight-through stop valve is relatively low, and the difficulty of maintenance and repair is also relatively low.
[0037] It can be understood that the first valve 110 and the second valve 211 can also be valve bodies such as control valves and one-way valves.
[0038] Optionally, the pressurizing pipe 100 is provided with a first pressure sensor 310, and the first pressure sensor 310 is located between the first valve 110 and the input end of the pressurizing pipe 100. In this way, the pressure value in the pressurizing pipe 100 is monitored through the first pressure sensor 310, and in the case that the pressure value in the pressurizing pipe 100 is too large, the pressure in the pressurizing pipe 100 can be reduced in time, so as to avoid damage to the pressurizing pipe 100 caused by the excessively large pressure in the pressurizing pipe 100.
[0039] Optionally, the first output end 210 of the communication pipe 200 is communicated with a first detection pipe 410, one end of the first detection pipe 410 is a first pressure relief end 411, the first pressure relief end 411 is provided with a first pressure relief valve 412, and the other end of the first detection pipe 410 is a first gas charging end 413; wherein the first gas charging end 413 is communicated with the first workpiece to be detected, and the first output end 210 further charges the gas into the first workpiece to be detected through the first gas charging end 413 of the first detection pipe 410. In this way, the first workpiece to be detected is communicated to the first gas charging end 413 of the first detection pipe 410, and under the condition that the first valve 110 and the second valve 211 are opened, the high-pressure gas is input into the first communication pipe 200 through the pressurizing pipe 100, and then is input into the first detection pipe 410, and the gas is charged into the first workpiece to be detected through the first gas charging end 413 of the first detection pipe 410 until the test pressure is reached, the first valve 110 is closed, and the first workpiece to be detected is detected. After the detection of the first workpiece to be detected is completed, the second workpiece to be detected is further communicated to the second output end 220, the third valve 221 is opened, and part of the gas in the first workpiece to be detected flows to the second workpiece to be detected. Then the second valve 211 is closed and the first valve 110 is opened, and then the high-pressure gas is sent into the second workpiece to be detected through the pressurizing pipe 100 until the test pressure is reached, the first valve 110 is closed, and the second workpiece to be detected is detected. The first pressure relief valve 412 is opened, the gas in the first workpiece to be detected is discharged through the first pressure relief end 411, thereby reducing the gas pressure in the first workpiece to be detected, so that the gas pressure in the first workpiece to be detected is the same as the air pressure. Avoid the impact caused by the high gas pressure when the first workpiece to be detected is separated from the first gas charging end 413, and improve the safety of the operation.
[0040] Optionally, the first detection pipe 410 is provided with a second pressure sensor 320, and the second pressure sensor 320 is located between the first gas charging end 413 and the first pressure relief valve 412. In this way, the pressure value in the first detection pipe 410 is monitored through the second pressure sensor 320, and in the case that the pressure value in the first detection pipe 410 is too large, the pressure in the first detection pipe 410 can be reduced in time to avoid damage to the first detection pipe 410 caused by the excessive pressure in the first detection pipe 410. Since the first detection pipe 410 is communicated with the first workpiece to be detected when the high-pressure gas is charged into the first workpiece to be detected, the second pressure sensor 320 can also monitor whether the pressure in the first workpiece to be detected meets the test pressure, and detect the sealing condition of the first workpiece to be detected after the second valve 211 is closed.
[0041] Optionally, the second output end 220 of the communication pipe 200 is in communication with a second detection pipe 420, one end of the second detection pipe 420 is a second pressure relief end 421, the second pressure relief end 421 is provided with a second pressure relief valve 422, and the other end of the second detection pipe 420 is a second gas charging end 423; wherein the second gas charging end 423 is in communication with a second workpiece to be detected, and the second output end 220 further charges the gas into the second workpiece to be detected through the second gas charging end 423 of the second detection pipe 420. In this way, after the detection of the first workpiece to be detected is completed, the first valve 110 and the third valve 221 are both in a closed state. The second workpiece to be detected is connected to the second gas charging end 423, the third valve 221 is opened, and part of the gas in the first workpiece to be detected flows to the second workpiece to be detected. The second valve 211 is closed, the first valve 110 is opened, high-pressure gas is charged into the second workpiece to be detected, until the test pressure is reached, the first valve 110 is closed, and the second workpiece to be detected is detected. After the detection of the second workpiece to be detected is completed, the third valve 221 is closed, the second pressure relief valve 422 is opened, and then the pressure in the second workpiece to be detected is reduced, so that the pressure in the second workpiece to be detected is the same as the air pressure. Avoid the impact caused by the high pressure when the second workpiece to be detected is separated from the second gas charging end 423, and improve the safety of the operation.
[0042] Optionally, a third pressure sensor 330 is arranged on the second detection pipe 420, and the third pressure sensor 330 is located between the second gas charging end 423 and the second pressure relief valve 422. In this way, the pressure value in the second detection pipe 420 is monitored by the third pressure sensor 330, and in the case that the pressure value in the second detection pipe 420 is too large, the pressure in the second detection pipe 420 can be reduced in time to avoid damage to the second detection pipe 420 caused by the excessive pressure in the second detection pipe 420. Since the second detection pipe 420 is in communication with the second workpiece to be detected when high-pressure gas is charged into the second workpiece to be detected, the third pressure sensor 330 can also monitor whether the pressure in the second workpiece to be detected meets the test pressure, and detect the sealing condition of the second workpiece to be detected after the third valve 221 is closed.
[0043] Optionally, the extension direction of the first gas charging end 413 is opposite to that of the first pressure relief end 411, and the extension direction of the second gas charging end 423 is opposite to that of the second pressure relief end 421. In this way, since the pressure is large when the pressure is relieved, the flow rate of the gas flow is high, and the first pressure relief end 411 and the second pressure relief end 421 are further away from the workpiece to be detected, reducing the risk of impact on the workpiece to be detected by the high-speed gas flow.
[0044] It can be understood that reducing the impact of high-speed gas flow on the workpiece to be detected can also reduce the impact on the operator.
[0045] Optionally, the pressure vessel automatic pressure test bench further comprises a buffer tank 500. The buffer tank 500 is in communication with the input end of the pressurizing pipe 100, has an air inlet 510 and an air outlet 520, the air inlet 510 is provided with an air inlet valve 530, and the air outlet 520 is provided with an air outlet valve 540. In this way, the buffer tank 500 can effectively reduce the fluctuation range of the air pressure and maintain the stability of the air pressure. The air inlet valve 530 is opened, and then high-pressure gas is input into the buffer tank 500 to provide high-pressure gas for the pressurizing pipe 100. The air inlet valve 530 is closed, and the air outlet valve 540 is opened, so that the gas in the buffer tank 500 can be discharged.
[0046] It can be understood that, since the buffer tank 500 is in communication with the pressurizing pipe 100, the first pressure sensor 310 can also detect the pressure in the buffer tank 500.
[0047] Optionally, the pressure vessel automatic pressure test bench further comprises a support frame 600. The buffer tank 500 is arranged in the support frame 600, the input end of the pressurizing pipe 100 is in communication with the buffer tank 500, and the output end of the pressurizing pipe 100 extends out of the support frame 600 through the support frame 600. In this way, by arranging the support frame 600, stable support is provided for the buffer tank 500, and then stable support is provided for the workpiece to be detected.
[0048] Optionally, a sliding frame 700 is arranged outside the buffer tank 500, the sliding frame 700 is arranged inside the support frame 600 and is in sliding connection with the support frame 600. In this way, the sliding frame 700 slides in the support frame 600, and then drives the buffer tank 500 to move relative to the support frame 600, so as to adjust the height of the buffer tank 500, the pressurizing pipe 100, the communication pipe 200, the first detection pipe 410 and the second detection pipe 420, so as to meet the detection of workpieces of different heights.
[0049] Optionally, two sliding frames 700 are arranged, and are arranged on both ends of the buffer tank 500. In this way, the two sliding frames 700 drive the buffer tank 500 to move relative to the support frame 600, improve the stability of the connection, and also improve the stability during sliding.
[0050] Optionally, a sliding groove 610 is arranged on the inner wall of the support frame 600, and the sliding frame 700 extends into the sliding groove 610 and is in sliding connection with the support frame 600. In this way, the stability of the connection between the support frame 600 and the sliding frame 700 is further improved, and the risk of disconnection between the sliding frame 700 and the support frame 600 is reduced.
[0051] Optionally, a driving member 800 is arranged on the lower side of the sliding frame 700, and the driving member 800 is arranged between the sliding frame 700 and the support frame 600 to drive the sliding frame 700 to slide on the support frame 600. In this way, the driving member 800 drives the sliding frame 700 to slide on the support frame 600, so as to meet the detection of workpieces of different heights.
[0052] Optionally, the driving member 800 comprises a hydraulic cylinder 810. The output end of the hydraulic cylinder 810 is connected with the sliding frame 700, and the other end of the hydraulic cylinder 810 is connected with the support frame 600. In this way, the output end of the hydraulic cylinder 810 extends and drives the sliding frame 700 to slide on the support frame 600 to rise, so as to meet the detection of workpieces with different heights.
[0053] Optionally, the support frame 600 is provided with a control console 620, and the control console 620 is provided with a first pressure gauge 621, a second pressure gauge 622 and a third pressure gauge 623. The first pressure gauge 621 is connected with the first pressure sensor 310, the second pressure gauge 622 is connected with the second pressure sensor 320, and the third pressure gauge 623 is connected with the third pressure sensor 330. In this way, the first pressure gauge 621 reflects the pressure value of the first pressure sensor 310, the second pressure gauge 622 reflects the pressure value of the second pressure sensor 320, and the third pressure gauge 623 reflects the pressure value of the third pressure sensor 330. All the pressure values can be observed on the control console 620, and the observation is more convenient.
[0054] The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable one skilled in the art to practice them. Other embodiments can include structural and other changes. The embodiments represent only a few of the possible changes. Individual components and functions are optional unless explicitly required, and the order of operations can be changed. Parts and features of some embodiments can be included or replace parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims
1. An automatic pressure testing bench for pressure vessels, characterized in that, include: The pressurization pipe (100) is equipped with a first valve (110), which is used to control the opening and closing of the pressurization pipe (100); The connecting pipe (200) is connected to the output end of the pressurizing pipe (100), and the connecting pipe (200) has a first output end (210) and a second output end (220). A second valve (211) is provided on the first output end (210), and a third valve (221) is provided on the second output end (220). The first output terminal (210) can be connected to the first workpiece to be tested and fill the first workpiece to be tested with gas. The second output terminal (220) can be connected to the second workpiece to be tested and fill the second workpiece to be tested with gas. When the first valve (110) is closed and the second valve (211) and the third valve (221) are both open, the gas in the first workpiece to be tested and the gas in the second workpiece to be tested can be interconnected.
2. The automatic pressure testing bench for pressure vessels according to claim 1, characterized in that, A first pressure sensor (310) is provided on the pressure pipe (100), and the first pressure sensor (310) is located between the first valve (110) and the input end of the pressure pipe (100).
3. The automatic pressure testing bench for pressure vessels according to claim 1, characterized in that, The first output end (210) of the connecting pipe (200) is connected to the first detection pipe (410). One end of the first detection pipe (410) is the first pressure relief end (411), and the first pressure relief end (411) is provided with a first pressure relief valve (412). The other end of the first detection pipe (410) is the first inflation end (413). The first inflation end (413) is connected to the first workpiece to be tested, and the first output end (210) then injects gas into the first workpiece to be tested through the first inflation end (413) of the first detection tube (410).
4. The automatic pressure testing bench for pressure vessels according to claim 3, characterized in that, The first detection tube (410) is equipped with a second pressure sensor (320), which is located between the first inflation end (413) and the first pressure relief valve (412).
5. The automatic pressure testing bench for pressure vessels according to claim 1, characterized in that, The second output end (220) of the connecting pipe (200) is connected to the second detection pipe (420). One end of the second detection pipe (420) is the second pressure relief end (421), and the second pressure relief end (421) is provided with a second pressure relief valve (422). The other end of the second detection pipe (420) is the second inflation end (423). The second inflation end (423) is connected to the second workpiece to be tested, and the second output end (220) then injects gas into the second workpiece to be tested through the second inflation end (423) of the second detection tube (420).
6. The automatic pressure testing bench for pressure vessels according to claim 5, characterized in that, The second detection tube (420) is equipped with a third pressure sensor (330), which is located between the second inflation end (423) and the second pressure relief valve (422).
7. The automatic pressure testing bench for pressure vessels according to any one of claims 1 to 6, characterized in that, Also includes: The buffer tank (500) is connected to the input end of the pressurization pipe (100) and has an air inlet (510) and an air outlet (520). The air inlet (510) is equipped with an air inlet valve (530) and the air outlet (520) is equipped with an air outlet valve (540).
8. The automatic pressure testing bench for pressure vessels according to claim 7, characterized in that, Also includes: The support frame (600) and the buffer tank (500) are located inside the support frame (600). The input end of the pressurization pipe (100) is connected to the buffer tank (500), and the output end of the pressurization pipe (100) extends outward through the support frame (600).
9. The automatic pressure testing bench for pressure vessels according to claim 8, characterized in that, The support frame (600) is equipped with a control console (620), and the control console (620) is equipped with a first pressure gauge (621), a second pressure gauge (622) and a third pressure gauge (623). The first pressure gauge (621) is connected to the first sensor, the second pressure gauge (622) is connected to the second sensor, and the third pressure gauge (623) is connected to the third sensor.