A seal detection device for pressure vessel and operation method

Abstract

The present invention provides a sealing detection device for a pressure vessel and an operating method, comprising a pressure vessel, a sealing tube and an air pump, wherein the pressure vessel is provided with an input port and an output port communicated with the pressure vessel cavity, the air pump is connected to the pressure vessel via the sealing tube through the input port, and a pressure sensor is provided in the pressure vessel cavity; a sealing device is provided at the input port of the pressure vessel, the sealing device comprises a piston slidably arranged in the input port and sleeved on the sealing tube, an elastic rubber layer sleeved on the sealing tube and connected to the lower end of the piston, and a buffer gasket arranged at the bottom end of the inner wall of the input port and matched with the elastic rubber layer; a cover plate is connected to the upper end of the guide sleeve, an electric cylinder is arranged on the cover plate, the electric cylinder pushes the piston, and the elastic rubber layer cooperates with the buffer gasket under the guiding action of the piston to achieve sealing of the neck of the pressure vessel, and the sealing ring is provided to greatly improve the efficiency and accuracy of the air tightness detection of the sealed container.

Description

Technical Field

[0001] The present invention mainly relates to the field of pressure vessel design, and in particular to a sealing detection device for a pressure vessel and an operating method thereof. Background Art

[0002] Pressure vessels refer to closed equipment that contains gas or liquid and bears a certain pressure. They are widely used and play an important role in many sectors such as industry, civil industry, military industry, and many fields of scientific research. Among them, the most used are in the chemical industry and petrochemical industry. The pressure vessels used in the petrochemical industry alone account for about 50% of the total number of pressure vessels. In the chemical and petrochemical fields, pressure vessels are mainly used in heat transfer, mass transfer, reaction and other process processes, as well as storage and transportation of pressurized gas or liquefied gas.

[0003] At present, when testing the sealing of a pressure vessel, a sealing connection device is usually first used to seal the container port of the pressure vessel, and then gas or liquid is filled into the pressure vessel, and the pressure in the pressure vessel is monitored. After the pressure in the pressure vessel is maintained for a period of time, the pressure change in the pressure vessel is observed to determine the sealing of the pressure vessel.

[0004] Regarding the above-mentioned related technologies, in the actual inspection process, the connection and tightening between the connecting device and the pressure vessel mainly involves applying sufficient tightening force to ensure the sealing performance between the connecting device and the pressure vessel. However, this excessive pressure application method has the problem of easily squeezing and damaging the neck of the pressure vessel, and the pressure changes in the pressure vessel at each stage cannot be effectively monitored, resulting in inaccurate detection data. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the present invention provides a sealing detection device and an operating method for a pressure vessel, which improves the stability of the connection between the pressure vessel and the connecting device, and facilitates observing the pressure changes in the pressure vessel to judge the sealing of the pressure vessel, thereby solving the problem that the connection between the existing connecting device and the pressure vessel is prone to squeeze and damage the neck of the pressure vessel, and the pressure changes in the pressure vessel at each stage cannot be effectively monitored.

[0006] In order to achieve the above-mentioned purpose of improving the stability of the connection between the pressure vessel and the connecting device, and facilitating the observation of the pressure change in the pressure vessel to judge the sealing performance of the pressure vessel, the present invention proposes the following technical solution:

[0007] A sealing detection device for a pressure vessel comprises a pressure vessel, a sealing tube and an air pump, wherein the pressure vessel is provided with an input port and an output port communicating with the pressure vessel cavity, the air pump is connected to the pressure vessel through the sealing tube via the input port, and a pressure sensor for detecting gas pressure is provided in the pressure vessel cavity;

[0008] A sealing device is provided at the input port of the pressure vessel, and the sealing device includes a piston slidably arranged in the input port and sleeved on the sealing tube, an elastic rubber layer sleeved on the sealing tube and connected to the lower end of the piston, and a buffer gasket arranged at the bottom end of the inner wall of the input port and matched with the elastic rubber layer;

[0009] A cover plate is connected to the upper end of the guide sleeve, and an electric cylinder is arranged on the cover plate. The cylinder body of the electric cylinder is fixed on the cover plate, and the gas rod of the electric cylinder passes through the cover plate and is connected to the upper surface of the input port; the electric cylinder is used to drive the piston to slide in the input port, and the elastic rubber layer is extruded and sealed with the buffer gasket under the guidance of the piston.

[0010] Furthermore, the piston is covered with a sealing ring for sealing with the inner wall of the input port.

[0011] Furthermore, a one-way valve is provided on the sealing tube to prevent the gas flowing into the pressure vessel cavity from flowing back through the sealing tube, and a pressure reducing valve is provided on the output port of the pressure vessel to stably discharge the gas in the pressure vessel cavity.

[0012] Furthermore, the above also includes a central controller, the input end of the central controller is connected to a pressure sensor, and the central controller generates an execution signal based on the pressure value detected in the pressure container cavity fed back by the pressure sensor and the set threshold value;

[0013] The output end of the central controller is connected in parallel with a one-way valve and a pressure reducing valve, and automatically controls the opening and closing of the one-way valve and the pressure reducing valve according to the execution signal, thereby realizing the gas path control of the sealing detection device for the pressure vessel.

[0014] Furthermore, the output end of the central controller is also connected in parallel to an electric cylinder and an air pump;

[0015] A touch screen connected to the central controller is provided on the outside of the air pump for displaying the changes in gas pressure in the pressure vessel cavity, as well as the operating status of the electric cylinder and the air pump, and serving as an operation command input interface for the central controller.

[0016] Furthermore, the central controller is used to accept operation instructions issued by the user through the touch screen, drive the electric cylinder to seal the pressure vessel, and drive the air pump to perform a sealing test on the pressure vessel.

[0017] Furthermore, a foot base for fixing the pressure vessel is provided at the lower end of the pressure vessel.

[0018] The present invention also provides a method for operating a sealing detection device for a pressure vessel, comprising the following steps:

[0019] Step S1: Confirmation before the test: driving the electric cylinder at the input port of the pressure vessel 1 to confirm that the pressure vessel is sealed;

[0020] Step S2: Test loading, driving the air pump to increase the pressure, gas flows into the pressure vessel cavity through the sealed pipe, and reaches 10% of the test pressure not less than 1 gauge pressure;

[0021] Maintain the pressure, close the one-way valve, and find the leaks at the input port, output port and welding point of the pressure vessel;

[0022] Step S3: cyclic loading, opening the one-way valve, and performing pressure increase and pressure maintenance based on step S2, and performing cyclic loading as one cycle;

[0023] Step S4: test collection and feedback. After reaching the test pressure, the air pump is stopped. The touch screen can intuitively display the pressure change of the gas in the pressure vessel cavity at each stage to determine whether the pressure vessel meets the use standard.

[0024] Step S5: After the test is finished, the pressure reducing valve is opened to allow the gas in the pressure vessel cavity to be discharged stably, and the test is terminated.

[0025] Furthermore, in the above step S2, the pressure holding time should be no less than 10 minutes, and the pressure change should be observed through the touch screen. If the pressure is stable, step S3 can be continued. If the pressure is unstable, find out and eliminate the cause of the pressure drop.

[0026] Furthermore, in the above step S3, the pressure should be increased step by step, and each step can increase the test pressure by 10-20%.

[0027] Beneficial effects of the present invention:

[0028] First, the present invention aims to solve the problem that the connection between the existing connection device and the pressure vessel is easy to cause extrusion and damage to the neck of the pressure vessel, and the pressure change in the pressure vessel at each stage cannot be effectively monitored. By setting a sealing device, the electric cylinder pushes the piston, and the elastic rubber layer cooperates with the buffer gasket under the guidance of the piston to seal the neck of the pressure vessel. At the same time, by setting a sealing ring, the sealing effect of the neck of the pressure vessel is further improved, which greatly improves the efficiency and accuracy of the airtightness detection of the sealed container;

[0029] Furthermore, by setting up a touch screen, not only can the changes in pressure in the pressure vessel at each stage be observed intuitively, but each corresponding stage can also be accurately controlled, which can effectively improve the accuracy of airtightness detection of sealed containers and reduce the operational difficulty of airtightness detection of sealed containers. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0032] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at point A;

[0033] In the figure,

[0034] 1. Pressure vessel; 2. Input port; 3. Output port; 4. Piston; 5. Elastic rubber layer; 6. Buffer gasket; 7. Cover plate; 8. Electric cylinder; 9. Pressure sensor; 10. Sealing ring; 11. One-way valve; 12. Pressure reducing valve; 13. Touch screen; 14. Footrest; 15. Sealing tube; 16. Air pump. DETAILED DESCRIPTION

[0035] In order to make the technical solution of the present invention better understood by the technical personnel in the field, and to make the above-mentioned features, purposes and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with the embodiments. The embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0036] Embodiment 1:

[0037] like Figure 1-3 As shown, the present invention proposes a sealing detection device for a pressure vessel, comprising a pressure vessel 1, a sealing tube 15 and an air pump 16; a foot 14 for fixing the pressure vessel 1 is provided at the lower end of the pressure vessel 1; an input port 2 and an output port 3 connected to the cavity of the pressure vessel 1 are provided on the pressure vessel 1, and the air pump 16 is connected to the pressure vessel 1 through the sealing tube 15 via the input port 2.

[0038] A sealing device is provided at the input port 2 of the pressure vessel 1, and the sealing device includes a piston 4, an elastic rubber layer 5 and a buffer gasket 6; the piston 4 is slidably arranged in the input port 2 and sleeved on the sealing tube 15, the piston 4 has a simple manufacturing process, and serves as a guide for the elastic rubber layer 5, and the piston 4 is sleeved with a sealing ring 10 for sealing with the inner wall of the input port 2; the elastic rubber layer 5 is sleeved on the sealing tube 15 and connected to the lower end of the piston 4, and the buffer gasket 6 is arranged at the bottom end of the inner wall of the input port 2 and is arranged in coordination with the elastic rubber layer 5; a cover plate 7 is connected to the upper end of the guide sleeve 4, and an electric cylinder 8 is provided on the cover plate 7, the cylinder body of the electric cylinder 8 is fixed on the cover plate 7, and the gas rod of the electric cylinder 8 passes through the cover plate 7 and is connected to the upper surface of the input port 2; the electric cylinder 8 is used to drive the piston 4 to slide in the input port 2, and the elastic rubber layer 5 is extruded and sealed with the buffer gasket 6 under the guidance of the piston 4, so as to improve the sealing of the input port 2, facilitate the sealing test, and improve the stability of the entire operation in a guided motion.

[0039] A pressure sensor 9 for detecting gas pressure is provided in the cavity of the pressure vessel 1; a one-way valve 11 is provided on the sealing tube 15 to prevent the gas flowing into the cavity of the pressure vessel 1 from flowing back through the sealing tube 15; a pressure reducing valve 12 is provided on the output port 3 of the pressure vessel 1 to stably discharge the gas in the cavity of the pressure vessel 1; a central controller is also included, the input end of the central controller is connected to the pressure sensor 9, the central controller generates an execution signal according to the pressure value detected in the cavity of the pressure vessel 1 fed back by the pressure sensor 9 and the set threshold value; the output end of the central controller is connected in parallel with the one-way valve 11 and the pressure reducing valve 12, and the one-way valve 11 and the pressure reducing valve 12 are automatically controlled according to the execution signal. The valve 11 and the pressure reducing valve 12 are opened and closed, thereby realizing the gas circuit control of the sealing detection device for the modified pressure vessel; the output end of the central controller is also connected in parallel with the electric cylinder 8 and the air pump 16; a touch screen 13 connected to the central controller is provided on the outside of the air pump 16, which is used to display the gas pressure change in the cavity of the pressure vessel 1, as well as the operating status of the electric cylinder 8 and the air pump 16, and is used as an operation instruction input interface of the central controller; the central controller is used to accept the operation instructions issued by the user through the touch screen 13, drive the electric cylinder 8 to seal the pressure vessel, and drive the air pump 16 to perform a sealing detection test on the pressure vessel.

[0040] Embodiment 2:

[0041] The present invention also provides a method for operating a sealing detection device for a pressure vessel, comprising the following steps:

[0042] Step 1: Confirmation before the test: Drive the electric cylinder 8 to the input port 2 of the pressure vessel 1 to confirm that the pressure vessel is sealed.

[0043] Step 2: Test loading, drive the air pump 16 to increase the pressure, and the gas flows into the cavity of the pressure vessel 1 through the sealing pipe 15, reaching 10% of the test pressure and not less than 1 gauge pressure;

[0044] Maintain the pressure, close the one-way valve 11, and check for leaks at the input port 2, output port 3 and welding points of the pressure vessel 1; the pressure maintenance time should be no less than 10 minutes, and observe the pressure changes through the touch screen 13. If the pressure is stable, continue to step S3. If the pressure is unstable, find out and eliminate the cause of the pressure drop.

[0045] The third step: cyclic loading, open the one-way valve 11, and perform pressure increase-pressure maintenance based on step S2, and perform cyclic loading as one cycle; the pressure increase should be increased step by step in stages, and each stage can increase the test pressure by 10-20%.

[0046] Step 4: Test collection and feedback. After reaching the test pressure, stop the air pump 16. The touch screen 13 can intuitively display the pressure change of the gas in the pressure vessel 1 cavity at each stage to determine whether the pressure vessel meets the use standards.

[0047] Step 5: After the test is finished, open the pressure reducing valve 12 to allow the gas in the cavity of the pressure vessel 1 to be discharged steadily, and terminate the test.

[0048] The above embodiments are merely illustrative of the principles and effects of this patent application, and are not intended to limit this patent application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of this patent application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in this patent application should still be covered by the claims of this patent application.

Claims

1. A seal detection device for a pressure vessel, characterized in that: The invention comprises a pressure container (1), a sealing tube (15) and an air pump (16); the pressure container (1) is provided with an input port (2) and an output port (3) which are in communication with the cavity of the pressure container (1); the air pump (16) is connected to the pressure container (1) via the sealing tube (15) through the input port (2); and a pressure sensor (9) for detecting gas pressure is provided in the cavity of the pressure container (1); The input port (2) of the pressure container (1) is provided with a sealing device, the sealing device comprising a piston (4) slidably arranged in the input port (2) and sleeved on a sealing tube (15), an elastic rubber layer (5) sleeved on the sealing tube (15) and connected to the lower end of the piston (4), and a buffer gasket (6) arranged at the bottom end of the inner wall of the input port (2) and arranged in cooperation with the elastic rubber layer (5); The upper end of the guide sleeve is connected to a cover plate (7), and an electric cylinder (8) is provided on the cover plate (7). The cylinder body of the electric cylinder (8) is fixed on the cover plate (7), and the gas rod of the electric cylinder (8) passes through the cover plate (7) and is connected to the upper surface of the input port (2); the electric cylinder (8) is used to drive the piston (4) to slide in the input port (2), and the elastic rubber layer (5) is extruded and sealed with the buffer gasket (6) under the guidance of the piston (4); a one-way valve (11) is provided on the sealing tube (15) to prevent the gas flowing into the cavity of the pressure container (1) from flowing back through the sealing tube (15), and a pressure reducing valve (12) is provided on the output port (3) of the pressure container (1) to stably discharge the gas in the cavity of the pressure container (1); The sealing detection device further comprises a central controller, the input end of the central controller is connected to a pressure sensor (9), and the central controller generates an execution signal based on the pressure value detected in the cavity of the pressure container (1) fed back by the pressure sensor (9) and compared with a set threshold value; the output end of the central controller is connected in parallel to a one-way valve (11) and a pressure reducing valve (12), and automatically controls the opening and closing of the one-way valve (11) and the pressure reducing valve (12) according to the execution signal, thereby realizing gas path control of the sealing detection device for the pressure container; The output end of the central controller is also connected in parallel to an electric cylinder (8) and an air pump (16); A touch screen (13) connected to the central controller is provided on the outside of the air pump (16) for displaying the change in gas pressure in the cavity of the pressure container (1) and the operating status of the electric cylinder (8) and the air pump (16), and for serving as an operation command input interface of the central controller.

2. The pressure vessel sealing detection device and operating method according to claim 1, characterized in that: The piston (4) is covered with a sealing ring (10) for sealing with the inner wall of the input port (2).

3. The pressure vessel sealing detection device according to claim 1, characterized in that: The central controller is used to receive operation instructions issued by the user through the touch screen (13), drive the electric cylinder (8) to seal the pressure container, and drive the air pump (16) to perform a sealing test on the pressure container.

4. The pressure vessel sealing detection device according to claim 1, characterized in that: The lower end of the pressure container (1) is provided with a foot seat (14) for fixing the pressure container (1).

5. A method for operating the seal detection device for a pressure vessel according to any one of claims 1 to 3, comprising the following steps: Step S1: Confirmation before the test: driving the electric cylinder (8) at the input port (2) of the pressure vessel (1) to confirm that the pressure vessel is sealed; Step S2: Test loading, driving the inflation pump (16) to increase the pressure, and the gas flows into the cavity of the pressure container (1) through the sealing tube (15) to reach 10% of the test pressure; Maintaining the pressure, closing the one-way valve (11), and searching for leaks at the input port (2), output port (3) and welding points of the pressure container (1); Step S3: cyclic loading, opening the one-way valve (11), and performing pressure increase and pressure maintenance based on step S2, and performing cyclic loading as one cycle; Step S4: test collection and feedback. After reaching the test pressure, the inflation pump (16) is stopped, and the change in the pressure of the gas in the cavity of the pressure container (1) at each stage can be intuitively displayed through the touch screen (13) to determine whether the pressure container meets the use standard; Step S5: After the test is finished, the pressure reducing valve (12) is opened to allow the gas in the cavity of the pressure vessel (1) to be discharged stably, and the test is terminated.

6. The method for operating a sealing detection device for a pressure vessel according to claim 5, characterized in that: In step S2, the pressure holding time should be no less than 10 minutes, and the pressure change is observed through the touch screen (13). If the pressure is stable, step S3 can be continued. If the pressure is unstable, the cause of the pressure drop is found and eliminated.

7. The method for operating a sealing detection device for a pressure vessel according to claim 5, characterized in that: In step S3, the pressure should be increased step by step, and each step can increase the test pressure by 10-20%.

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