Internal locking connector of safety interlocking testing device for pressure vessel with quick-opening door

Abstract

The utility model discloses an internal locking connector of a safety interlocking testing device for a pressure vessel with a quick-opening door. The internal locking connector comprises a first pipeline system, a second pipeline system and an internal locking connector body. When a first functional test is carried out, the first pipeline system and the second pipeline system are respectively connected with an upper pipe orifice and a lower pipe orifice of a third solenoid valve of the quick-opening pressure vessel through internal lock joints; in the second functional test, the first pipeline system is connected with a pressure gauge of the quick-opening pressure container through an internal locking connector; the inner locking connector comprises a sealing jacking column and a sealing sleeve, a plurality of steel balls are installed at the first end of the sealing sleeve in the radial direction, the sealing jacking column is connected into the sealing sleeve in a sealed mode, the first end of the sealing jacking column is provided with a wedge face, and the steel balls make mechanical hard contact with the inner wall of the installation hole under the radial force of the wedge face of the sealing jacking column. The beneficial effects of the utility model are that the sealing performance is ensured, and the safety interlocking test result is ensured to be accurate.

Description

Technical Field

[0001] The invention relates to the field of experimental equipment, in particular to a joint of a safety interlocking test device for a quick-opening pressure vessel. Background Art

[0002] A quick-opening pressure vessel is a pressure vessel with a nested quick-seal locking device between the end cover or head of the inlet and outlet passage and the main body. The safety interlock device is one of the important safety accessories of the quick-opening pressure vessel.

[0003] According to the special design requirements for quick-opening door pressure vessels in the "Regulations for the Supervision of Stationary Pressure Vessels" (TSG 21-2016), safety interlock devices should be installed on such vessels. The safety interlock device should meet the following requirements: 1. When the quick-opening door reaches the predetermined position, it can be operated at a higher pressure; 2. When the internal pressure of the pressure vessel is completely released, the quick-opening door can be opened. In order to ensure the safe operation of the quick-opening door pressure vessel, the safety interlock device must be functionally tested in the event of an abnormal situation, and the following two points must be met: First, if the quick-opening door is not closed in place, air intake and pressure increase are not allowed; second, if there is still pressure inside the pressure vessel, the door or cover of the quick-opening door pressure vessel cannot be opened.

[0004] like Figure 1 As shown, the principle of the safety interlock device of the quick-opening door pressure vessel is briefly described as follows: 1. Before the quick-opening door pressure vessel is operated, it is necessary to confirm whether the door or cover of the quick-opening door pressure vessel has reached the predetermined closing position. Only when the door or cover is closed to the predetermined position, the quick-opening door safety interlock device can transmit the signal of the door or cover being closed to the predetermined position to the third solenoid valve through the equipment safety interlock device signal transmission <1>. At this time, the third solenoid valve is allowed to be opened, and the gas enters the quick-opening door pressure vessel, and the quick-opening door pressure vessel starts to increase pressure. In this way, the function of the safety interlock device of the quick-opening door pressure vessel meets the first requirement specified in the regulations-when the quick-opening door reaches the predetermined position, it can increase pressure; otherwise, the third solenoid valve cannot be opened, and the gas cannot enter the quick-opening door pressure vessel. 2. After the operation of the shutter-type pressure vessel is completed, before opening the door or cover of the quick-opening pressure vessel, it is necessary to confirm whether the internal pressure of the container is completely released. Only when the internal pressure of the container is completely released, the pressure gauge used to measure the internal pressure of the container transmits the signal that the internal pressure of the container is completely released to the door or cover of the quick-opening pressure vessel through the signal transmission of the equipment safety interlock device <2>, and the door or cover of the quick-opening pressure vessel is automatically unlocked and allowed to be opened. In this way, the function of the safety interlock device of the quick-opening pressure vessel meets the second requirement stipulated in the regulations-the quick-opening door can be opened only when the internal pressure of the pressure vessel is completely released; otherwise, the door or cover of the quick-opening pressure vessel cannot be opened. Figure 1 The equipment and parts contained in it are the body of the quick-opening pressure vessel to be tested and its accessories.

[0005] At present, the functional test of the safety interlock device is mainly carried out by the gas source of the equipment itself. 3 The above), if a large amount of steam is required to achieve the pressurized working condition, even if the pressure in the kettle is very small, the destructive energy it contains is enough to cause casualties and property losses. Also, because the tester does not know whether the safety interlock device is normal or effective before testing the safety interlock device, in case the safety interlock device has failed, when the test container is under pressure, the door or cover of the quick-opening pressure vessel is opened, it is very likely that the container will cause casualties and property losses. Not only that, in this pressurized working condition, to test whether the safety interlock device meets the requirement that the quick-opening door can be opened only after the internal pressure is completely released, the door opening operation must be performed. Therefore, the traditional testing method has low safety. It can be seen that this method is neither economical nor safe. The problems with this method include cumbersome operation, no energy saving, poor safety, and a small scope of application.

[0006] Furthermore, during the functional test of the safety interlock device, the sealing performance of each part should be high. If the inner locking joint leaks or has poor sealing, it will easily cause inaccurate test results and affect the final normal use.

[0007] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art. Utility Model Content

[0008] The technical problem to be solved by the utility model is: how to solve the problem that the inner locking joint in the test device for the functional test of the safety interlock device cannot meet the sealing requirements, which may lead to inaccurate test results and affect the final use.

[0009] The utility model solves the above technical problems through the following technical means:

[0010] The inner locking joint of the safety interlock test device of the quick-opening door pressure vessel comprises a first pipeline system, a second pipeline system, and an inner locking joint; during the functional test one, the first pipeline system and the second pipeline system are respectively connected to the upper pipe opening and the lower pipe opening of the third solenoid valve of the quick-opening door pressure vessel through the inner locking joint; during the functional test two, the first pipeline system is connected to the pressure gauge of the quick-opening door pressure vessel through the inner locking joint;

[0011] The inner locking joint includes a sealing top column and a sealing sleeve. A plurality of steel balls are radially installed on the first end of the sealing sleeve. The sealing top column is sealingly connected to the sealing sleeve and the first end of the sealing top column has a wedge surface. The steel balls are subjected to the radial force of the wedge surface of the sealing top column to produce mechanical hard contact with the inner wall of the mounting hole.

[0012] The utility model tests the two requirements that the safety interlock device should meet through the safety interlock test device. The functional test of the safety interlock device is carried out safely and quickly through this test device, which is the first in China to realize the "non-destructive" functional test of the safety interlock device of the quick-opening pressure vessel in use; the pressure is directly applied to the pressure measuring device with a small amount of energy consumption to simulate the pressurized working condition of the quick-opening pressure vessel, thereby increasing the safety of the debugging work; the device performs directional pressurization on the relevant parts of the equipment body through the booster device, which can save energy by more than 95% compared with the traditional debugging method. It is effective, safe and energy-saving. In the process of connecting the inner locking joint of the utility model with the sealing sleeve through the sealing top column, the steel ball is subjected to the radial force of the wedge surface to produce mechanical hard contact with the inner wall of the mounting hole, thereby ensuring the sealing and ensuring the accuracy of the safety interlock test results.

[0013] Preferably, the inner locking joint further comprises a sealing nut, wherein the sealing nut is connected to the second end of the sealing sleeve and abuts against the second end of the sealing top column.

[0014] Preferably, the sealing top column and the sealing nut penetrate along the central axis to form an air path.

[0015] Preferably, the second end of the sealing sleeve has threads on the outside, the sealing nut is a concave cylinder structure, the inner wall of the sealing nut has threads, and the sealing sleeve is connected to the sealing nut by bolts.

[0016] Preferably, a sealing ring is connected between the second end surface of the sealing sleeve and the inner wall of the sealing nut.

[0017] Preferably, the first end of the sealing sleeve is provided with a radially penetrating wedge-shaped hole, the steel ball is placed in the wedge-shaped hole, and the second end of the sealing sleeve is a cylindrical tube structure having a size larger than the mounting hole, and the second end of the sealing top column is accommodated in the cylindrical tube.

[0018] Multiple sealing structures ensure the reliability of sealing.

[0019] Preferably, the sealing top column is a T-shaped rod structure.

[0020] Preferably, the outer wall of the sealing sleeve is provided with a plurality of sealing ring grooves, and the sealing ring grooves are built in the sealing ring.

[0021] Preferably, the outer wall of the sealing pressure column is provided with a sealing ring groove, and the sealing ring groove is built in the sealing ring.

[0022] Preferably, when performing a functional test on the safety interlock device in a simulated case where the door or cover of the quick-opening door pressure vessel is not fully closed, the first pipeline body is connected to the upper pipe opening of the third solenoid valve of the quick-opening door pressure vessel through an inner locking joint, and the second pipeline system is connected to the lower pipe opening of the third solenoid valve of the quick-opening door pressure vessel through an inner locking joint;

[0023] When performing a functional test on the safety interlock device by simulating a situation where the internal pressure of the quick-opening door pressure vessel is not completely released, the first pipeline system is connected to the pressure gauge of the quick-opening door pressure vessel through an inner locking joint.

[0024] Preferably, the first pipeline system also includes a filter, an air pump, a first solenoid valve, a one-way valve, and a first pressure sensor which are sequentially arranged along the first pipeline body; the first pipeline system also includes an exhaust pipeline, which is connected to the first pipeline body and is located between the one-way valve and the first pressure sensor, and a second solenoid valve is also connected to the exhaust pipeline.

[0025] Preferably, the second pipeline system further comprises a plug, and the plug is located at the end of the second pipeline body.

[0026] The advantages of the utility model are:

[0027] (1) The utility model uses a safety interlock test device to test the two requirements that the safety interlock device should meet. This set of test equipment can be used to safely and quickly test the functionality of the safety interlock device, and is the first in China to implement "non-destructive" functional testing of the safety interlock device of a quick-opening pressure vessel. A small amount of energy is used to directly apply pressure to the pressure measuring device to simulate the pressurized working conditions of a quick-opening pressure vessel, thereby increasing the safety of the debugging work. The device uses a booster device to perform directionally boosted pressure on the relevant components of the equipment body, which can save more than 95% energy compared to traditional debugging methods. It is effective, safe, and energy-saving;

[0028] (2) During the connection process between the inner locking joint of the utility model and the sealing sleeve through the sealing top column, the steel ball is subjected to the radial force of the wedge surface to produce mechanical hard contact with the inner wall of the mounting hole, thereby ensuring the sealing performance and ensuring the accuracy of the safety interlocking test results;

[0029] (3) The utility model improves the sealing performance and ensures the test results through multiple sealing settings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of a quick-opening pressure vessel and a safety interlocking device in the background technology;

[0031] Figure 2 is a schematic diagram of a functional test of a safety interlock device in an embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of a functional test of a safety interlock device in an embodiment of the present invention;

[0033] Figure 4 is a schematic structural diagram of an inner locking joint in an embodiment of the present invention;

[0034] Figure 5 is a schematic cross-sectional view of a sealing top column in an embodiment of the present invention;

[0035] Figure 6 is a schematic structural diagram of a sealing sleeve in an embodiment of the present invention;

[0036] Figure 7 is a cross-sectional schematic diagram of a sealing sleeve in an embodiment of the present invention;

[0037] Figure 8 is a schematic cross-sectional view of a sealing nut according to an embodiment of the present invention;

[0038] Numbers in the figure:

[0039] 1. First pipeline system; 11. Filter; 12. Air pump; 13. First solenoid valve; 14. One-way valve; 15. First pressure sensor; 16. Second solenoid valve;

[0040] 2. Second pipeline system; 21. Second pressure sensor; 22. Plug;

[0041] 3. Electrical control system; 31. Near-end control system; 32. Remote human-computer interaction system;

[0042] 4. The third solenoid valve; 41. Equipment air inlet;

[0043] 5. Pressure gauge; 51. Pressure gauge connection pipe;

[0044] 6. Safety interlock device for quick-opening pressure vessels;

[0045] 7. Internal locking joint; 71. Sealing top column; 711. First air path; 712. First sealing ring groove; 713. Hexagon socket position; 72. Sealing sleeve; 721. Steel ball; 722. Wedge-shaped hole; 723. Second sealing ring groove; 724. Wrench position; 73. Sealing nut; 731. Second air path; 732. Third sealing ring groove; 74. Sealing ring; 8. Mounting hole. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] Embodiment 1:

[0048] like Figure 1 As shown, the right side of the quick-opening door pressure vessel is connected to the quick-opening door pressure vessel safety interlock device 6, and the right side of the quick-opening door pressure vessel includes a door or cover for entering the quick-opening door pressure vessel. The top of the quick-opening door pressure vessel includes a third solenoid valve 4 and a pressure gauge 5. The third solenoid valve 4 is used for gas to enter during use, and an equipment air inlet pipe 41 is provided at the bottom. The pressure gauge 5 is used to measure the internal pressure of the quick-opening door pressure vessel, and a pressure gauge pipe port 51 is provided at the bottom. In the prior art, the third solenoid valve 4 is connected to the quick-opening door pressure vessel safety interlock device 6 through the equipment safety interlock device signal transmission (I), and the pressure gauge is connected to the quick-opening door pressure vessel safety interlock device 6 through the equipment safety interlock device signal transmission (II).

[0049] Specifically, the principle of the safety interlock device of the quick-opening pressure vessel is briefly described as follows:

[0050] Before the operation of the quick-opening door pressure vessel, it is necessary to confirm whether the door or cover of the quick-opening door pressure vessel has reached the predetermined closing position. Only when the door or cover is closed to the predetermined position, the quick-opening door safety interlock device can transmit the signal that the door or cover has been closed to the predetermined position to the third solenoid valve 4 through the equipment safety interlock device signal transmission (I). The third solenoid valve 4 is allowed to be opened at this time, and the gas will enter the interior of the quick-opening door pressure vessel through the third solenoid valve 4, and the quick-opening door pressure vessel starts to increase pressure operation. In this way, the function of the safety interlock device 6 of the quick-opening door pressure vessel meets the first requirement stipulated in the regulations-when the door or cover of the quick-opening door pressure vessel reaches the predetermined position, it can increase pressure operation; otherwise, the third solenoid valve 4 cannot be opened, and the gas cannot enter the interior of the quick-opening door pressure vessel.

[0051] After the operation of the quick-opening pressure vessel is completed, before opening the door or cover of the quick-opening pressure vessel, it is necessary to confirm whether the internal pressure of the container is completely released. Only when the internal pressure of the container is completely released, the pressure gauge 5 used to measure the internal pressure of the container transmits the signal that the internal pressure of the container has been completely released to the door or cover of the quick-opening pressure vessel through the signal transmission (II) of the equipment safety interlock device, and the door or cover of the quick-opening pressure vessel is automatically unlocked and allowed to be opened. In this way, the function of the safety interlock device 6 of the quick-opening pressure vessel meets the second requirement stipulated in the regulations-the quick-opening door can be opened only when the internal pressure of the pressure vessel is completely released; otherwise, the door or cover of the quick-opening pressure vessel cannot be opened. The equipment and components contained in the figure are the main body of the quick-opening pressure vessel to be tested and its own accessories, not the components of the test device.

[0052] In this embodiment, Figure 2 , Figure 3 As shown, the safety interlock test device for a quick-opening pressure vessel includes a first pipeline system 1, a second pipeline system 2, and an electrical control system 3; the first pipeline system 1 and the second pipeline system 2 are both connected to the electrical control system 3. Thus, the program predetermined function is realized. In this embodiment, a lithium battery power supply (not shown in the figure) should also be included, and the lithium battery power supply is electrically connected to the electrical control system 3, the first pipeline system 1, and the second pipeline system 2 to realize power supply.

[0053] The electrical control system 3 includes a proximal control system 31 and a remote human-computer interaction system 32, wherein the proximal control system 31 is located near the quick-opening door pressure vessel, and the remote human-computer interaction system 32 is located far away from the quick-opening door pressure vessel. The proximal control system 31 is communicatively connected with the remote human-computer interaction system 32, and the proximal control system 31 is electrically connected to both the first pipeline system 1 and the second pipeline system 2.

[0054] like Figure 2 As shown, during the functional test 1, the first pipeline system 1 and the second pipeline system are respectively connected to the upper pipe opening and the lower pipe opening of the third solenoid valve 4 of the quick-opening pressure vessel through the inner locking joint 7; Figure 3 As shown, during the second functional test, the first pipeline system 1 is connected to the pressure gauge of the quick-opening door pressure vessel via an inner locking joint 7.

[0055] like Figure 2 , Figure 3 As shown, the first pipeline system 1 includes a first pipeline body, and a filter 11, an air pump 12, a first solenoid valve 13, a one-way valve 14, and a first pressure sensor 15 which are sequentially installed on the first pipeline body from the air inlet end; an exhaust pipeline is also connected between the one-way valve 14 and the first pressure sensor 15, and a second solenoid valve 16 is also connected to the exhaust pipeline. Figure 2It can be seen that one end of the first pipeline body is the air inlet end, from which the ambient gas enters, and the other end is connected to the upper pipe opening of the third solenoid valve 4 through an inner locking joint 7. The second pipeline system 2 includes a second pipeline body and a second pressure sensor 21 and a plug 22 installed on the second pipeline body; the second pipeline body and the lower pipe opening of the third solenoid valve 4 are connected to the equipment air inlet pipe opening 41 through an inner locking joint 7'.

[0056] It should be noted that the first pipeline system 1 and the second pipeline system 2 are connected to the quick-opening pressure vessel at different locations when performing different tests; Figure 2 As shown, the first pipeline system 1 and the second pipeline system 2 are both connected to the third solenoid valve 4; Figure 3 As shown, only the first pipeline system 1 is connected to the pressure gauge 5. The detailed description is as follows.

[0057] like Figure 2 As shown, the safety interlock device is functionally tested when the door or cover of the simulated quick-opening pressure vessel is not fully closed (i.e., the door or cover is in an open or half-open state); the third solenoid valve 4 that controls the air intake cannot be opened according to the regulations, and the air intake into the quick-opening pressure vessel cannot be realized. This embodiment uses the test device to test whether this function of the equipment safety interlock device meets the requirements.

[0058] After the first pipeline system 1 and the second pipeline system 2 are connected to the third solenoid valve 4, the control test can be performed through the electrical control system 3. Specifically, the electrical control system 3 controls the air pump 12 to work, opens the first solenoid valve 13, sets the target pressure to 0.5 MPa, and the ambient gas is Figure 2 Enter the first pipeline system 1 in the direction shown. When the first pressure sensor 15 shows that the pressure reaches 0.5MPa, the air intake automatically stops running and maintains the pressure. During the process of increasing and maintaining pressure, the tester clicks to run the opening program of the third solenoid valve 4 of the quick-opening pressure vessel. If the first pressure sensor 15 has a stable pressure indication, and the second pressure sensor 21 has no pressure indication, it means that the safety interlock device 6 of the quick-opening pressure vessel is normal, the third solenoid valve 4 is not opened and there is no internal leakage; if the first pressure sensor 15 has a pressure indication, the second pressure sensor 21 also has a pressure indication and is close to or consistent with the indication of the first pressure sensor 15, it means that the safety interlock device 6 of the quick-opening pressure vessel is completely invalid, the third solenoid valve 4 is opened or the third solenoid valve 4 is completely invalid; if the first pressure sensor 15 has a normal pressure indication, the second pressure sensor 21 has a pressure indication but the value is smaller than that of the first pressure sensor 15, it means that there is a problem with the safety interlock device 6 of the quick-opening pressure vessel, the third solenoid valve 4 may be opened or the third solenoid valve 4 itself has a weak internal leakage.

[0059] After the air intake is completed, the pressure in the pipeline is discharged through the second solenoid valve 16, and then the first pipeline system 1 can be removed.

[0060] like Figure 3 As shown, this embodiment uses only the first pipeline system 1 to simulate the pressurized state of the quick-opening door pressure vessel (ie, the internal pressure of the quick-opening door pressure vessel is not completely released) to perform a functional test on the safety interlock device.

[0061] The traditional test method requires the entire cavity of the quick-opening pressure vessel to be pressurized by air intake. The internal pressure of the vessel acts on the pressure gauge 5. The pressure gauge 5 displays the pressure and transmits the signal of internal pressure to the safety interlock device 6 of the quick-opening pressure vessel through the signal transmission of the equipment safety interlock device (II). At this time, the door or cover of the quick-opening pressure vessel should not be opened. Otherwise, the safety interlock device fails.

[0062] In this embodiment, the first pipeline system 1 is connected to the pressure gauge pipe port 51 of the pressure gauge 5 through the inner locking joint 7, and specifically, the end of the first pipeline body is connected to the pressure gauge pipe port 51 through the inner locking joint 7. After the connection is completed, the control test can be performed through the remote human-computer interaction system 32 or the near-end control system 31. The process requires a preset running program, delayed execution (the time can be preset), and automatic exhaust stops after a certain period of operation (the time can be preset), so as to realize the directional pressurization of the pressure gauge 5 with a very small gas flux, thereby simulating the pressure condition of the quick-opening device.

[0063] It should be noted that: because this test requires the quick-opening pressure vessel to be completely closed, the quick-opening pressure vessel is a closed metal cavity, and the wireless signal cannot effectively interact in real time. Therefore, a preset method is used to allow the device to automatically run and stop. For example: the preset target pressure is 0.5MPa, the preset delay execution time is 5 minutes, and the preset pressure holding operation time is 5 minutes. The test device will start air intake and pressurization 5 minutes after the preset completion, and enter the pressure holding operation stage when the pressure increases to 0.5MPa, and start exhaust after 5 minutes of pressure holding.

[0064] After the program preset is completed, close the quick-opening pressure vessel, and after the running time is reached, observe the indication of the pressure gauge 5 of the quick-opening pressure vessel equipment. In this embodiment, the preset target pressure is 0.2MPa, and the pressure-maintaining operation time is 5 minutes. Because the pressure measuring device of the quick-opening pressure vessel body, the pressure gauge 5, is subjected to directional pressurization, the pressure gauge 5 will have the same pressure display of 0.2MPa, so as to simulate the environment where there is pressure inside the container. The indication of the pressure gauge 5 indicates that the pressure inside the container has not been completely released, and the door or cover of the quick-opening pressure vessel should not be opened. During the pressure-maintaining operation stage, click to run the quick-opening door or cover opening program. If the door or cover of the quick-opening pressure vessel is opened, it means that the safety interlock device 6 of the quick-opening pressure vessel has failed.

[0065] After the preset instruction ends, the device automatically discharges the pressure in the pipeline through the second solenoid valve 16, opens the quick-opening door pressure container, releases the connection between the inner locking joint 7 and the first pipeline system 1, and the test process ends.

[0066] This embodiment uses the safety interlock test device to test the two requirements that the safety interlock device should meet. This embodiment uses this set of test devices to safely and quickly test the functionality of the safety interlock device, and is the first in China to implement "non-destructive" functional testing of the safety interlock device of the quick-opening pressure vessel in use; the test device can use a remote wireless control system and a small amount of energy consumption to directly apply pressure to the pressure measuring device to simulate the pressurized working conditions of the quick-opening pressure vessel, thereby increasing the safety of the commissioning work; the device uses a booster device to perform directional boosting on the relevant parts of the equipment body, which can save energy by more than 95% compared with the traditional commissioning method; the booster device is fixed at the internal pipe mouth of the container by a quick-connect connector that adapts to different structural types. The device has good applicability and can be used for equipment of different structural types and materials. It has effectiveness, safety, energy saving, and applicability.

[0067] The components are connected to the main controller through signal wires to realize signal transmission and ensure safety; the relevant parts of the equipment body are directed to be pressurized through the booster device to achieve energy saving of the device.

[0068] like Figure 4-Figure 8 As shown, the inner locking joint 7 includes a sealing top column 71 and a sealing sleeve 72. A plurality of steel balls 721 are radially installed on the first end of the sealing sleeve 72. The sealing top column 71 is sealingly connected to the sealing sleeve 72 and the first end of the sealing top column 71 has a wedge surface. The steel balls 721 are subjected to the radial force of the wedge surface of the sealing top column 71 to produce mechanical hard contact with the inner wall of the mounting hole 8.

[0069] It should be noted that the first end of the sealing sleeve 72 refers to Figure 4 The top end in the figure, the inner wall of the mounting hole referred to in this embodiment is the mounting hole of the quick-opening pressure vessel, the pipe mouth of the third solenoid valve 4, and refers to the position where the inner locking joint 7 is installed, generally referring to the hole.

[0070] Specifically, Figure 5 As shown, refer to Figure 4As shown, the sealing top column 71 is a T-shaped rod-shaped structure; the top end of the sealing top column 71 is a wedge surface, and the steel ball 721 can be gradually pushed out radially when the sealing top column 71 is gradually screwed into the sealing sleeve 72. The outer wall of the sealing top column 71 is provided with a first sealing ring groove 712, and the first sealing ring groove 712 is built in the sealing ring 74a. The lower section of the first sealing ring groove 712 has an external thread, and correspondingly, the inner wall of the sealing sleeve 72 has an internal thread, and the sealing top column 71 can be screwed into the sealing sleeve 72 by means of the thread. The sealing top column 71 penetrates along the axial direction to form a first gas path 711. An internal hexagonal position 713 is provided at the center of the bottom end of the sealing top column 71 for installation.

[0071] like Figure 6 , Figure 7 As shown, refer to Figure 4 The first end of the sealing sleeve 72 is provided with a wedge-shaped hole 722 extending radially therethrough, and the steel ball 721 is placed in the wedge-shaped hole 722. The second end of the sealing sleeve 72 is a cylindrical structure larger than the mounting hole 8, and the second end of the sealing top column 71 is accommodated in the cylindrical structure. The outer wall of the sealing sleeve 72 is provided with a plurality of second sealing ring grooves 723, and the second sealing ring grooves 723 are built in the sealing ring 74b. A step is milled on the cylindrical structure of the sealing sleeve 72, and planes are milled at both ends of the step as the wrench position 724.

[0072] It should be noted that the size of the wedge-shaped hole 722 near the inner wall is larger than the size near the outer wall, and the size of the wedge-shaped hole 722 on the outer wall is smaller than the diameter of the steel ball 721, so that the steel ball 721 can be accommodated in the wedge-shaped hole 722 and cannot escape from the wedge-shaped hole 722 on the outer wall, and the steel ball 721 can only protrude from the wedge-shaped hole 722 but cannot escape. In this embodiment, the angle of the wedge-shaped hole 722 is 27°. There are four wedge-shaped holes 722, which are evenly distributed.

[0073] like Figure 8 As shown, refer to Figure 4 As shown, the inner locking joint 7 also includes a sealing nut 73, which is connected to the second end of the sealing sleeve 72 and abuts against the second end of the sealing top column 71 to ensure the stability of the sealing top column 71. The second end of the sealing sleeve 72 has a thread on the outside, and the sealing nut 73 is a concave cylinder structure. The inner wall of the sealing nut 73 has a thread, and the sealing sleeve 72 and the sealing nut 73 are connected by threads. The sealing nut 73 penetrates along the central axis to form a second gas path 731, and the central axis of the first gas path 711 and the second gas path 731 roughly coincide, ensuring that the gas path is unobstructed. A third sealing ring groove 732 is opened on the bottom surface inside the sealing nut 73, and the third sealing ring groove 732 is filled with a sealing ring 74c. The second end surface of the sealing sleeve 72 and the inner wall of the sealing nut 73 are sealed by the sealing ring 74c.

[0074] The installation process of this embodiment:

[0075] An O-type sealing ring 74b is installed in the second sealing ring groove 723 of the sealing sleeve 72, and a steel ball 721 is installed in the wedge-shaped hole 722. An O-type sealing ring 74a is installed in the first sealing ring groove 712 of the sealing top column 71.

[0076] Install the sealing top column 71 into the sealing sleeve 72, and install it into the mounting hole 8 of the quick-opening pressure vessel; use a wrench to fix it at the wrench position 724 of the sealing sleeve 72, and use an inner hexagonal wrench to screw the sealing top column 71 at the inner hexagonal position 713 of the sealing top column 71. During the rising process of the sealing top column 71, the top wedge surface of the sealing top column 71 gradually squeezes the steel ball 721, so that the steel ball 721 moves in the radial direction and produces mechanical hard contact with the inner wall of the mounting hole 8, ensuring that the inner locking joint 7 is firmly fixed.

[0077] An O-ring 74c is installed in the third sealing ring groove 732 in the sealing nut 73, and the sealing nut 73 is tightened with a wrench to enhance the overall sealing performance of the inner locking joint 7. After the inner locking joint 7 is installed, it is connected to the gas pipeline using a conventional ferrule.

[0078] In the process of connecting the inner locking joint 7 of this embodiment with the sealing top column 71 and the sealing sleeve 72, the steel ball 721 is subjected to the radial force of the wedge surface to produce mechanical hard contact with the inner wall of the mounting hole 8, thereby ensuring the sealing performance and ensuring the accuracy of the safety interlocking test result. At the same time, the reliability of the sealing is ensured by various sealing structures such as threaded connection and sealing ring 74.

[0079] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An inner locking joint of a quick-opening pressure vessel safety interlock test device, characterized in that: It includes a first piping system, a second piping system, and an inner locking joint; during the functional test 1, the first piping system and the second piping system are respectively connected to the upper pipe opening and the lower pipe opening of the third solenoid valve of the quick-opening door pressure vessel through the inner locking joint; during the functional test 2, the first piping system is connected to the pressure gauge of the quick-opening door pressure vessel through the inner locking joint; The inner locking joint includes a sealing top column and a sealing sleeve. A plurality of steel balls are radially installed on the first end of the sealing sleeve. The sealing top column is sealingly connected to the sealing sleeve and the first end of the sealing top column has a wedge surface. The steel balls are subjected to the radial force of the wedge surface of the sealing top column to produce mechanical hard contact with the inner wall of the mounting hole.

2. The inner locking joint of the safety interlocking test device for a quick-opening pressure vessel according to claim 1, characterized in that: The inner locking joint also includes a sealing nut, which is connected to the second end of the sealing sleeve and abuts against the second end of the sealing top column.

3. The inner locking joint of the safety interlocking test device for a quick-opening pressure vessel according to claim 2, characterized in that: The sealing top column and the sealing nut penetrate along the central axis to form an air path.

4. The inner locking joint of the safety interlock test device for a quick-opening pressure vessel according to claim 2, characterized in that: The second end of the sealing sleeve has threads on the outside, the sealing nut is a concave cylinder structure, the inner wall of the sealing nut has threads, and the sealing sleeve is connected to the sealing nut by bolts.

5. The inner locking joint of the safety interlocking test device for a quick-opening pressure vessel according to claim 2, characterized in that: A sealing ring is connected between the second end surface of the sealing sleeve and the inner wall of the sealing nut.

6. The inner locking joint of the safety interlocking test device for a quick-opening pressure vessel according to claim 1, characterized in that: The first end of the sealing sleeve is provided with a wedge-shaped hole penetrating in the radial direction, the steel ball is placed in the wedge-shaped hole, and the second end of the sealing sleeve is a cylindrical tube structure whose size is larger than the mounting hole, and the second end of the sealing top column is accommodated in the cylindrical tube.

7. The inner locking joint of the safety interlocking test device for a quick-opening pressure vessel according to claim 1, characterized in that: The sealing top column is a T-shaped rod structure.

8. The inner locking joint of the safety interlocking test device for a quick-opening pressure vessel according to claim 1, characterized in that: The outer wall of the sealing sleeve is provided with a plurality of sealing ring grooves, and the sealing ring is built in the sealing ring; the outer wall of the sealing pressure column is provided with a sealing ring groove, and the sealing ring groove is built in the sealing ring.

9. The inner locking joint of the safety interlocking test device for a quick-opening pressure vessel according to claim 1, characterized in that: When performing a functional test on the safety interlock device in a simulated situation where the door or cover of the quick-opening door pressure vessel is not fully closed, the first pipeline system is connected to the upper pipe opening of the third solenoid valve of the quick-opening door pressure vessel through an inner locking joint, and the second pipeline system is connected to the lower pipe opening of the third solenoid valve of the quick-opening door pressure vessel through an inner locking joint; When performing a functional test on the safety interlock device by simulating a situation where the internal pressure of the quick-opening door pressure vessel is not completely released, the first pipeline system is connected to the pressure gauge of the quick-opening door pressure vessel through an inner locking joint.

10. The inner locking joint of the safety interlocking test device for a quick-opening pressure vessel according to claim 1, characterized in that: The first pipeline system also includes a filter, an air pump, a first solenoid valve, a one-way valve, and a first pressure sensor which are sequentially arranged along the first pipeline body; the first pipeline system also includes an exhaust pipeline, which is connected to the first pipeline body and is located between the one-way valve and the first pressure sensor, and a second solenoid valve is also connected to the exhaust pipeline; the second pipeline system includes a second pipeline body and a second pressure sensor and a plug installed on the second pipeline body, and the plug is located at the end of the second pipeline body.

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