Pressure reduction partition door valve for explosion test chamber

Abstract

The utility model relates to the technical field of explosion test cabins, in particular to a pressure reduction partition door valve for an explosion test cabin, which comprises a vacuum cabin, a pressure reduction cabin and a connector pipe, a partition door is rotatably arranged at one end, extending into the vacuum cabin, of the connector pipe, a locking component is arranged between the connector pipe and the partition door, and an opening and closing mechanism for driving the partition door to move is further arranged on the connector pipe. When the door is closed, the opening and closing mechanism is started to drive the partition door to rotate, the locking assembly is started to enable the partition door to seal the connector pipe, during a pressure reduction experiment, the partition door is rapidly opened under the action of pressure difference and the opening and closing mechanism, gas in the pressure reduction cabin enters the vacuum cabin through the connector pipe, and therefore the explosion pressure reduction experiment is achieved through opening and closing of the partition door. Multiple explosion pressure reduction tests can be realized through repeated operation, and a diaphragm does not need to be arranged or replaced, so that the cost is reduced, and the efficiency of the explosion pressure reduction tests is improved.

Description

Technical Field

[0001] This utility model relates to the field of explosion test chamber technology, and in particular to a pressure-reducing isolation valve for an explosion test chamber. Background Technology

[0002] An explosive decompression chamber, also known as a rapid decompression chamber, is a specially designed device used to simulate or handle sudden pressure drops in high-pressure environments. The design of an explosive decompression chamber is based on the principle of pressure regulation and usually consists of a sealed container. The interior of the container can simulate different pressure environments. When decompression is required, the pressure inside the chamber drops rapidly, sometimes even to an explosive degree, hence the name "explosive decompression." During the decompression process, the gas volume inside the chamber expands rapidly, thus simulating the sudden decompression situation that may be encountered in a real environment.

[0003] In related technologies, one can refer to Chinese invention patent with authorization announcement number CN105521836B, which discloses a low-pressure test system, including a first pressure box and a second pressure box that are set independently of each other. An explosion valve device is provided between the two pressure boxes. The explosion valve device includes an air duct, a pressure relief valve, a fixed seat, a through hole, a top cylinder, a diaphragm, and a striker. The diaphragm is used to close the air duct. When rapid decompression is required, the striker moves and punctures the diaphragm.

[0004] Once the diaphragm is punctured by the impact pin, it cannot be reused and needs to be replaced for the next test, which not only increases the test cost but also reduces the test efficiency. Utility Model Content

[0005] In order to improve the efficiency of explosion decompression tests and reduce test costs, this utility model provides a decompression isolation valve for an explosion test chamber.

[0006] This application provides a pressure-reducing barrier valve for an explosion test chamber, employing the following technical solution:

[0007] A pressure-reducing partition valve for an explosion test chamber includes a vacuum chamber, a depressurization chamber, and an interface pipe. The interface pipe connects the vacuum chamber and the depressurization chamber and extends into the vacuum chamber at one end. A partition is rotatably provided at the end of the interface pipe extending into the vacuum chamber. A locking assembly is provided between the interface pipe and the partition. An opening and closing mechanism for driving the partition to move is also provided on the interface pipe.

[0008] By adopting the above technical solution, when the door is closed, the opening and closing mechanism is activated, driving the partition door to rotate. At the same time, the locking component is activated, causing the partition door to seal the interface pipe, thus locking the partition door. At this time, the vacuum chamber and the decompression chamber are separated into two sealed spaces by the partition door. The gas pressure in the vacuum chamber and the decompression chamber can be regulated. The gas pressure in the decompression chamber is greater than that in the vacuum chamber. When conducting a decompression experiment, the locking component closes, and the partition door opens rapidly under the action of the pressure difference and the opening and closing mechanism. The gas in the decompression chamber enters the vacuum chamber through the interface pipe. In this way, the explosion decompression test is achieved by opening and closing the partition door. Repeated operation can achieve multiple explosion decompression tests without the need to install or replace the diaphragm, thereby reducing costs and improving the efficiency of the explosion decompression test.

[0009] Optionally, the locking assembly includes an electromagnet and a magnetic block. The electromagnet is located inside the interface tube, and the magnetic block is located on the partition door. When the interface tube is in the closed state, the magnetic block and the electromagnet are attracted together.

[0010] By adopting the above technical solution, when the door is closed, the electromagnet is energized, and the opening and closing mechanism causes the partition door to rotate until the magnetic block and the electromagnet are attracted together. During the test, the electromagnet is de-energized, and then the opening and closing mechanism rotates to drive the partition door away from the electromagnet, thereby realizing the locking and opening process of the interface tube of the partition door. The attraction between the electromagnet and the magnetic block improves the sealing effect of the partition door on the structural tube, thereby improving the accuracy and efficiency of the test.

[0011] Optionally, the opening and closing mechanism includes:

[0012] A slide rail is provided on the side wall of the partition door facing the decompression chamber. The extension direction of the slide rail is perpendicular to the extension direction of the rotation center line of the partition door. A slider is slidably provided on the slide rail.

[0013] A first linear drive unit is disposed on the partition door and its telescopic end is connected to the slider.

[0014] The first spring is located inside the interface tube and connected to the slider. When the telescopic end of the first linear drive extends, it will drive the slider to slide along the slide rail and keep the first spring in a stretched state. The partition door moves to the closed state under the action of the first spring force. During the closing process, the slider moves away from the rotation center line of the partition door.

[0015] A pre-tensioned anti-impact assembly is installed inside the vacuum chamber and connected to the partition door.

[0016] By adopting the above technical solution, when the door is closed, the first linear drive unit drives the slider to move away from the center line of rotation of the partition door. The movement of the slider causes the first spring to stretch. Under the tension of the first spring, the partition door rotates towards the interface pipe until the magnetic block and the electromagnet are attracted together. After the partition door is closed, the first linear drive unit drives the slider to move back, so that the first spring returns to its initial state. When depressurization occurs, the electromagnet is de-energized. Under the action of pressure difference, the partition door pops open, the first spring is straightened, and at the same time, the pre-tension anti-impact component is activated to limit the rotation angle of the partition door, so as to prevent the partition door from hitting the inner wall of the vacuum chamber after it pops open, thereby improving the protection of the partition door and the vacuum chamber. This realizes the test process of explosive depressurization. The operation is simple, and repeated operation can realize multiple explosive depressurization tests, thereby improving the test efficiency.

[0017] Optionally, the pre-tensioned anti-impact assembly includes:

[0018] The second linear drive is disposed inside the vacuum chamber and its telescopic end extends along the length of the interface tube.

[0019] The second spring has one end fixed to the telescopic end of the second linear drive member, and the other end connected to the side wall of the partition door away from the first spring. When the partition door is opened to its maximum, the second spring is in a stretched state.

[0020] By adopting the above technical solution, when the door is closed, the telescopic end of the second linear drive extends and the second spring is in a free state. After the partition door rotates and locks, the telescopic end of the second linear drive retracts, and the second spring is in a tensioned state, thereby applying a pre-tension force to the partition door. At this time, the attraction force between the electromagnet and the magnetic block keeps the partition door in a closed and locked state. During the test, the electromagnet is de-energized, and the partition door springs open under the pressure difference and the tension of the second spring. At the same time, the partition door stretches the first spring. Both the first spring and the second spring exert tension on the partition door, thereby limiting the opening angle of the partition door and preventing the partition door from hitting the inner wall of the vacuum chamber. This achieves rapid decompression while extending the service life of the partition door.

[0021] Optionally, a support frame is fixed inside the interface tube, and the first spring is fixed in the middle of the support frame. When the partition door is opened to its maximum, the first spring is in a stretched state.

[0022] By adopting the above technical solution, when the first spring is located at the upper or lower part, the opening angle of the partition door is smaller, which leads to a decrease in the efficiency of pressure reduction. When the first spring is located in the middle, it is easier to open the partition door.

[0023] Optionally, both the first linear drive and the second linear drive are cylinders.

[0024] By adopting the above technical solution, the cylinder is selected to facilitate the control of the extension and retraction distance of the first linear drive component and the second linear drive component.

[0025] Optionally, a door frame is fixed to one end of the interface tube that extends into the vacuum chamber, and the electromagnet is mounted on the door frame. When the interface tube is in a sealed state, the partition door rests against the door frame.

[0026] By adopting the above technical solution, the sealing effect of the partition door is enhanced by setting a door frame.

[0027] Optionally, a sealing strip is provided between the door frame and the partition door.

[0028] By adopting the above technical solution, the sealing strip increases the sealing effect of the partition door, thereby improving the accuracy and efficiency of the test.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. When closing the door, the opening and closing mechanism activates, causing the partition door to rotate. Simultaneously, the locking component activates, causing the partition door to seal the interface pipe, thus locking the partition door. At this time, the vacuum chamber and the decompression chamber are separated into two sealed spaces by the partition door. The gas pressure in the vacuum chamber and the decompression chamber can be regulated. The gas pressure in the decompression chamber is greater than that in the vacuum chamber. When conducting a decompression experiment, the locking component closes, and the partition door opens rapidly under the action of the pressure difference and the opening and closing mechanism. The gas in the decompression chamber enters the vacuum chamber through the interface pipe. In this way, the explosion decompression test is achieved by opening and closing the partition door. Repeated operation can achieve multiple explosion decompression tests without the need to install or replace the diaphragm, thereby reducing costs and improving the efficiency of the explosion decompression test.

[0031] 2. By setting up electromagnets and magnetic blocks for attraction, the sealing effect of the partition door is increased.

[0032] 3. When the door is closed, the telescopic end of the second linear drive extends, freeing the second spring. After the partition door rotates and locks, the telescopic end of the second linear drive retracts, tightening the second spring and applying a pre-tension force to the partition door. At this time, the attraction force between the electromagnet and the magnetic block keeps the partition door closed and locked. During the test, the electromagnet is de-energized, and the partition door springs open under the pressure difference and the tension of the second spring. At the same time, the partition door stretches the first spring, and both the first and second springs exert tension on the partition door, thereby limiting the opening angle of the partition door and preventing the partition door from hitting the inner wall of the vacuum chamber. This achieves rapid decompression while extending the service life of the partition door. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of this application;

[0034] Figure 2This is a schematic diagram of the structure in this application where the partition door is closed and the slider is in the return state;

[0035] Figure 3 This is a schematic diagram of the structure in this application where the partition door is closed and the second spring is in a pre-tensioned state;

[0036] Figure 4 This is a schematic diagram of the partition door in the open state in this application.

[0037] Reference numerals: 1. Vacuum chamber; 11. Mounting bracket; 2. Decompression chamber; 3. Interface pipe; 31. Door frame; 311. Sealing strip; 32. Support frame; 4. Partition door; 5. Locking assembly; 51. Electromagnet; 52. Magnetic block; 6. Opening and closing mechanism; 61. Slide rail; 611. Slider; 62. First linear drive component; 63. First spring; 64. Pre-tension anti-impact assembly; 641. Second linear drive component; 642. Second spring. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0039] This application discloses a pressure-reducing barrier valve for use in an explosion test chamber.

[0040] Reference Figure 1 and Figure 2 A pressure-reducing partition valve for an explosion test chamber includes a vacuum chamber 1, a pressure-reducing chamber 2, and an interface pipe 3. The interface pipe 3 connects the vacuum chamber 1 and the pressure-reducing chamber 2, with one end extending into the vacuum chamber 1. The end of the interface pipe 3 extending into the vacuum chamber 1 is rotatably equipped with a partition 4. A locking assembly 5 is provided between the interface pipe 3 and the partition 4. The interface pipe 3 is also equipped with an opening and closing mechanism 6 that drives the partition 4 to move.

[0041] Reference Figure 1 and Figure 2 In this embodiment, both the vacuum chamber 1 and the decompression chamber 2 are spherical containers, the interface pipe 3 is a circular pipe with a diameter of 350mm, and the partition door 4 is circular. In other feasible embodiments, the shapes of the vacuum chamber 1 and the decompression chamber 2 can be adjusted, such as cylindrical or cuboid. The shape and size of the interface pipe 3 and the partition door 4 can also be adjusted accordingly. Insulation plates can also be added to the partition door 4 as needed.

[0042] Reference Figure 1 and Figure 2 One end of the interface pipe 3 extending into the vacuum chamber 1 is fixed with a door frame 31. When the interface pipe 3 is in a sealed state, the partition door 4 rests against the door frame 31, and a sealing strip 311 is provided between the partition door 4 and the door frame 31.

[0043] Reference Figure 1 and Figure 2For ease of explanation, in this embodiment, the rotating end of the partition door 4 is at the top. The locking component 5 includes an electromagnet 51 and a magnetic block 52. The electromagnet 51 is fixed at the lower end of the door frame 31, and the magnetic block 52 is fixed at the end of the partition door 4 away from the rotating end. When the interface tube 3 is in the closed state, the magnetic block 52 and the electromagnet 51 are attracted together.

[0044] Reference Figure 1 , Figure 3 and Figure 4 The opening and closing mechanism 6 includes a slide rail 61, a first linear drive component 62, a first spring 63, and a pre-tension anti-impact component 64. The slide rail 61 is fixed on the side wall of the partition door 4 facing the decompression chamber 2. The extension direction of the slide rail 61 is perpendicular to the extension direction of the rotation center line of the partition door 4. The slide rail 61 is provided with a slider 611 sliding along the extension direction.

[0045] Reference Figure 1 , Figure 2 and Figure 3 The first linear drive member 62 is fixed on the side wall of the partition 4 facing the decompression chamber 2. The telescopic end of the first linear drive member 62 is fixedly connected to the slider 611. Under the action of the first linear drive member 62, the slider 611 can slide along the extension direction of the slide rail 61.

[0046] Reference Figure 1 , Figure 3 and Figure 4 The first spring 63 is located inside the interface tube 3 and connected to the slider 611. A support frame 32 is fixed inside the interface tube 3. One end of the first spring 63 is fixed to the middle of the support frame 32 and the other end is fixed to the slider 611. When the telescopic end of the first linear drive member 62 extends, it will drive the slider 611 to slide along the slide rail 61 and put the first spring 63 in a stretched state. Under the action of the elastic force of the first spring 63, the partition door 4 moves to the closed state. During the closing process, the slider 611 moves away from the rotation center line of the partition door 4.

[0047] Reference Figure 1 , Figure 3 and Figure 4 The pre-tension anti-impact assembly 64 is located inside the vacuum chamber 1 and connected to the partition door 4. The pre-tension anti-impact assembly 64 includes a second linear drive member 641 and a second spring 642. A mounting bracket 11 is fixed inside the vacuum chamber 1. The second linear drive member 641 is fixed on the mounting bracket 11 and its telescopic end extends along the length direction of the interface tube 3. One end of the second spring 642 is fixed to the telescopic end of the second linear drive member 641, and the other end of the second spring 642 is connected to the side wall of the partition door 4 away from the first spring 63.

[0048] Both the first linear drive 62 and the second linear drive 641 are cylinders. In other feasible embodiments, the first linear drive 62 and the second linear drive 641 may also be linear drive devices such as electric cylinders.

[0049] The experimental procedure is as follows:

[0050] Reference Figure 1 and Figure 2 When the door is closed, the telescopic end of the second linear drive 641 extends, freeing the second spring 642. The first linear drive 62 drives the slider 611 to move away from the rotation centerline of the partition door 4. The movement of the slider 611 stretches the first spring 63. Under the tension of the first spring 63, the partition door 4 rotates toward the interface tube 3 and fits against the door frame 31. The electromagnet 51 is energized, and the magnetic block 52 is attracted to the electromagnet 51. The partition door 4 presses the sealing strip 311 tightly.

[0051] Reference Figure 2 and Figure 3 After the partition door 4 is closed, the first linear drive 62 drives the slider 611 to move back, thereby causing the first spring 63 to move back to its initial state. The telescopic end of the second linear drive 641 retracts, causing the second spring 642 to be in a tensioned state, thereby applying a pre-tension force to the partition door 4. At this time, the attraction force between the electromagnet 51 and the magnetic block 52 keeps the partition door 4 in a closed and locked state.

[0052] Reference Figure 2 and Figure 3 At this time, vacuum chamber 1 and decompression chamber 2 are separated into two sealed spaces by partition door 4. The air pressure in vacuum chamber 1 and decompression chamber 2 can be regulated. The air pressure in decompression chamber 2 is greater than the air pressure in vacuum chamber 1. In this embodiment, the pressure in decompression chamber 2 is regulated to 75.2 kPa and the pressure in vacuum chamber 1 is 4 kPa.

[0053] Reference Figure 3 and Figure 4 During decompression, electromagnet 51 is de-energized. Under the pressure difference and the tension of the second spring 642, the partition door 4 springs open. The partition door 4 rotates and pulls the first spring 63 straight. Both the first spring 63 and the second spring 642 exert tension on the partition door 4. When the partition door 4 is opened to its maximum, the second spring 642 is in a stretched state and the first spring 63 is in a taut state, thereby limiting the opening angle of the partition door 4 and preventing the partition door 4 from hitting the inner wall of the vacuum chamber 1. This achieves rapid decompression while extending the service life of the partition door 4. In this embodiment, after the partition door 4 is opened, the air pressure in the decompression chamber 2 drops to 18.8 kPa within about 0.1 seconds, thereby realizing the rapid explosion decompression test process. The operation is simple, and repeated operation can achieve multiple explosion decompression tests without the need to set up or replace the diaphragm, thereby reducing costs and improving the efficiency of the explosion decompression test.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pressure relief door valve for an explosion test chamber, characterized by: The application relates to a vacuum chamber (1), a decompression chamber (2) and an interface pipe (3) which is connected with the vacuum chamber (1) and the decompression chamber (2) and extends into the vacuum chamber (1), a door (4) is arranged on the end of the interface pipe (3) extending into the vacuum chamber (1), a locking assembly (5) is arranged between the interface pipe (3) and the door (4), and an opening and closing mechanism (6) for driving the door (4) to move is further arranged on the interface pipe (3). The locking assembly (5) comprises an electromagnet (51) and a magnetic block (52), the electromagnet (51) is arranged in the interface pipe (3), and the magnetic block (52) is arranged on the door (4); when the interface pipe (3) is in a closed state, the magnetic block (52) and the electromagnet (51) are attracted together.

2. A pressure relief door valve for an explosion test chamber according to claim 1, characterized in that: The opening and closing mechanism (6) comprises: a sliding rail (61) which is arranged on the side wall of the door (4) facing the decompression chamber (2), the extending direction of the sliding rail (61) is perpendicular to the extending direction of the rotation center line of the door (4), and a sliding block (611) is slidably arranged on the sliding rail (61); a first linear driving element (62) which is arranged on the door (4) and connected with the sliding block (611) at the telescopic end; a first spring (63) which is arranged in the interface pipe (3) and connected with the sliding block (611), when the telescopic end of the first linear driving element (62) is extended, the sliding block (611) is driven to slide along the sliding rail (61) and the first spring (63) is in a stretched state, the door (4) is driven to move to a closed state by the elastic force of the first spring (63), and the sliding block (611) moves away from the rotation center line of the door (4) during the closing process; a pre-tensioning and anti-collision assembly (64) which is arranged in the vacuum chamber (1) and connected with the door (4).

3. A pressure relief door valve for an explosion test chamber according to claim 2, characterized in that: The pre-tensioning and anti-collision assembly (64) comprises: a second linear driving element (641) which is arranged in the vacuum chamber (1) and extends at the telescopic end along the length direction of the interface pipe (3); a second spring (642) which is fixedly arranged at one end of the telescopic end of the second linear driving element (641) and connected with the side wall of the door (4) away from the first spring (63) at the other end, and the second spring (642) is in a stretched state when the door (4) is opened to the maximum.

4. A pressure relief door valve for an explosion test chamber according to claim 2, characterized in that: A supporting frame (32) is fixedly arranged in the interface pipe (3), and the first spring (63) is fixedly arranged in the middle of the supporting frame (32), and the first spring (63) is in a stretched state when the door (4) is opened to the maximum.

5. A pressure relief door valve for an explosion test chamber according to claim 3, characterized in that: Both the first linear driving element (62) and the second linear driving element (641) are air cylinders.

6. A pressure relief door valve for an explosion test chamber according to claim 1, characterized in that: A door frame (31) is fixedly arranged at the end of the interface pipe (3) extending into the vacuum chamber (1), the electromagnet (51) is arranged on the door frame (31), and the door (4) abuts against the door frame (31) when the interface pipe (3) is in a sealed state.

7. A pressure relief door valve for an explosion test chamber according to claim 6, characterized in that: A sealing strip (311) is arranged between the door frame (31) and the door (4).

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