High-negative-pressure closed valve special for civil air defense

Abstract

The utility model relates to the technical field of civil air defense engineering equipment, in particular to a high-negative-pressure closed valve special for civil air defense. The device comprises a valve seat, a mounting flange, a sealing ring a, a valve body, a supporting block, a rotating shaft, a rotating disc, a sliding block, a touch switch, a flow meter, a moving mechanism, a sliding plate, a blocking block, a baffle and a controller. When the valve is closed, the sliding block makes contact with the touch switch, the controller controls the flow meter to start to detect flow, when the flow is detected to be abnormal, the moving mechanism is started to move the blocking block towards the baffle to block the air hole, and therefore auxiliary sealing can be conducted in time when the valve fails.

Description

Technical Field

[0001] The utility model relates to the technical field of civil air defense engineering equipment, in particular to a high negative pressure closed valve dedicated for civil air defense. Background Art

[0002] In the ventilation facilities of civil air defense projects, ventilation and airtight valves are used to control the ventilation speed. Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. When airtight valves work under high negative pressure, the pressure generated by the pressure difference can easily cause the failure of the airtight parts, thereby causing the entire valve to fail.

[0003] The Chinese patent with the publication number CN210950002U discloses a closed valve for civil air defense. Sealing parts are provided at the joints of each part to ensure the sealing of the device. At the same time, the ball is matched with the valve body, and the ventilation speed can be controlled by switching the ball, which plays a role of regulation and is easy to use. At the same time, a filtering structure is provided. By placing filtering materials in the filter screen, impurities and bacteria can be effectively filtered when the ventilation facility is started. When the accumulation is too much, it can be cleaned and replaced by opening the end cover. The operation is simple and the ventilation facility can be kept clean and sanitary.

[0004] However, the above patent has the following shortcomings:

[0005] When the closed valve works in a high negative pressure environment, the force generated by the pressure difference can easily cause the sealing parts to fail, thereby causing the valve to fail. Utility Model Content

[0006] The utility model aims to solve the problems existing in the background technology and proposes a high negative pressure airtight valve for civil air defense which can timely perform auxiliary airtightness when the valve fails.

[0007] The technical solution of the utility model is a high-negative pressure airtight valve specially used for civil defense, comprising a valve seat, a mounting flange, a sealing ring a, a valve body, a supporting block, a rotating shaft, a rotating disk, a sliding block, a touch switch, a flow meter, a moving mechanism, a sliding plate, a blocking block, a baffle and a controller; the mounting flange is arranged on the valve seat, the sealing ring a is arranged on the mounting flange, the valve body is rotatably arranged on the valve seat, the supporting block is arranged on the valve seat, the rotating shaft is rotatably arranged on the supporting block and the rotating shaft is connected to the valve body, the rotating disk is arranged on the rotating shaft, a sliding groove is arranged on the supporting block, the sliding block is slidably arranged in the sliding groove and the sliding block is connected to the rotating shaft, the touch switch is arranged in the sliding groove, the flow meter is arranged in the valve body, the moving mechanism is arranged in the valve body, the sliding plate is slidably arranged in the valve seat and is connected to the moving mechanism, the blocking block is arranged on the sliding plate, the baffle is arranged inside the valve seat, the baffle is arranged with an air vent, the outer diameter of the blocking block is consistent with the inner diameter of the air vent, the controller is arranged on the valve seat, the touch switch and the flow meter are electrically connected to the controller, and the controller controls the connected moving mechanism.

[0008] Preferably, the rotating shaft abuts against the touch switch when it rotates to the closed state.

[0009] Preferably, the moving mechanism and the flow meter are arranged on the same side of the valve body, and the flow meter is arranged on the left side of the moving mechanism.

[0010] Preferably, the moving mechanism includes a rotating motor, a rotating shaft, a connecting block and a connecting rod. The rotating motor is arranged in the valve seat, the rotating motor drives the connecting rotating shaft, the connecting block is arranged on the sliding plate, one end of the connecting rod is rotatably arranged on the rotating shaft, the other end of the connecting rod is provided with a connecting groove, and the connecting block is slidably arranged in the connecting groove.

[0011] Preferably, it also includes a plug, a sealing ring b and a sealing ring c, the plug is arranged on the blocking block and the plug is arranged in a semicircular shape, the sealing ring b is arranged on the blocking block, and the sealing ring c is arranged on the air vent.

[0012] Preferably, it also includes a stopper, which is arranged in the valve seat and located on the right side of the flow meter.

[0013] Preferably, it also includes a filter assembly, which includes a mounting sleeve, a filter and fastening bolts. The mounting sleeve is arranged on the valve seat, the filter is arranged on the mounting sleeve by the fastening bolts, and the end of the filter is inserted into the valve seat.

[0014] Compared with the prior art, the utility model has the following beneficial technical effects:

[0015] The utility model arranges a sliding block, a touch switch, a flow meter, a moving mechanism, a sliding plate, a blocking block, a baffle and a controller. When the valve is closed, the sliding block contacts the touch switch, and the controller controls the flow meter to start detecting the flow. When the detected flow is abnormal, the moving mechanism is started to move the blocking block toward the baffle to block the air vent, so that auxiliary sealing can be performed in time when the valve fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the support block in the embodiment of the utility model;

[0018] Figure 3 for Figure 1 A magnified view of the structure at center.

[0019] : Illustrations: 1. valve seat; 2. mounting flange; 3. sealing ring a; 4. valve body; 5. support block; 501. sliding groove; 6. rotating shaft; 7. turntable; 8. sliding block; 9. touch switch; 10. flow meter; 11. moving mechanism; 111. rotating motor; 112. rotating shaft; 113. connecting block; 114. connecting rod; 115. connecting groove; 12. sliding plate; 13. blocking block; 14. baffle; 141. air vent; 15. plug; 16. sealing ring b; 17. sealing ring c; 18. block; 19. mounting sleeve; 20. filter; 21. fastening bolts. DETAILED DESCRIPTION

[0020] Embodiment 1

[0021] like Figure 1-Figure 3As shown, a high negative pressure airtight valve for civil air defense proposed in this embodiment includes a valve seat 1, a mounting flange 2, a sealing ring a3, a valve body 4, a support block 5, a rotating shaft 6, a rotating disk 7, a sliding block 8, a touch switch 9, a flow meter 10, a moving mechanism 11, a sliding plate 12, a blocking block 13, a baffle 14 and a controller; the mounting flange 2 is arranged on the valve seat 1, the sealing ring a3 is arranged on the mounting flange 2, the valve body 4 is rotatably arranged on the valve seat 1, the supporting block 5 is arranged on the valve seat 1, the rotating shaft 6 is rotatably arranged on the supporting block 5 and the rotating shaft 6 is connected to the valve body 4, the rotating disk 7 is arranged on the rotating shaft 6, and the supporting block 5 is provided with a sliding groove 50 1, the sliding block 8 is slidably arranged in the sliding groove 501 and the sliding block 8 is connected to the rotating shaft 6, the touch switch 9 is arranged in the sliding groove 501, the flow meter 10 is arranged in the valve body 4, the moving mechanism 11 is arranged in the valve body 4, the sliding plate 12 is slidably arranged in the valve seat 1 and is connected to the moving mechanism 11, the blocking block 13 is arranged on the sliding plate 12, the baffle plate 14 is arranged inside the valve seat 1, the baffle plate 14 is provided with an air hole 141, the outer diameter of the blocking block 13 is consistent with the inner diameter of the air hole 141, the controller is arranged on the valve seat 1, the touch switch 9 and the flow meter 10 are electrically connected to the controller, and the controller controls the connecting moving mechanism 11.

[0022] When using the airtight valve, the valve seat 1 is installed at the desired position through the mounting flange 2, and the side with the flow meter 10 is connected to the negative pressure section. When the rotating disk 7 drives the rotating shaft 6 to rotate, the sliding block 8 contacts the touch switch 9, and the controller controls the flow meter 10 to start detecting the flow. When an abnormal flow is detected, the moving mechanism 11 is started to drive the sliding plate 12 to move toward the air vent 141 until the blocking block 13 blocks the air vent 141. At the same time, the pressure generated by the pressure difference will further cause the blocking block 13 to block the air vent 141. This structure can perform auxiliary sealing in time when the valve fails.

[0023] Embodiment 2

[0024] like Figure 1-Figure 3 As shown, the embodiment of the present invention proposes a high negative pressure airtight valve for civil air defense. Compared with the first embodiment, in the present embodiment, the rotating shaft 6 abuts against the touch switch 9 when it is turned to the closed state. Thus, it is possible to detect whether the valve is in the closed state. The moving mechanism 11 and the flow meter 10 are arranged on the same side of the valve body 4, and the flow meter 10 is arranged on the left side of the moving mechanism 11. This is conducive to the flow meter 10 detecting the flow rate.

[0025] The moving mechanism 11 includes a rotating motor 111, a rotating shaft 112, a connecting block 113 and a connecting rod 114. The rotating motor 111 is arranged in the valve seat 1. The rotating motor 111 drives and connects the rotating shaft 112. The connecting block 113 is arranged on the sliding plate 12. One end of the connecting rod 114 is rotatably arranged on the rotating shaft 112. The other end of the connecting rod 114 is provided with a connecting groove 115. The connecting block 113 is slidably arranged in the connecting groove 115. The rotating motor 111 is started to drive the rotating shaft 112 to rotate, drive the connecting rod 114 to rotate, and thus drive the sliding plate 12 to slide through the connecting block 113.

[0026] The high negative pressure airtight valve for civil air defense further comprises a plug 15, a sealing ring b16 and a sealing ring c17. The plug 15 is arranged on the block 13 and is arranged in a semicircular shape. The sealing ring b16 is arranged on the block 13, and the sealing ring c17 is arranged on the vent 141. The plug 15 is arranged to facilitate the block 13 to enter the vent 141. The sealing effect is further enhanced by arranging the sealing ring b16 and the sealing ring c17.

[0027] Embodiment 3

[0028] like Figure 1 As shown, the high negative pressure airtight valve for civil air defense proposed in this embodiment, compared with the first embodiment, in this embodiment, further includes a stopper 18, which is arranged in the valve seat 1 and is located on the right side of the flow meter 10. The high negative pressure airtight valve for civil air defense also includes a filter assembly, which includes a mounting sleeve 19, a filter 20 and a fastening bolt 21, the mounting sleeve 19 is arranged on the valve seat 1, the filter 20 is arranged on the mounting sleeve 19 by the fastening bolt 21, and the end of the filter 20 is inserted into the valve seat 1.

[0029] In this embodiment, the position of the sliding plate 12 is limited by setting a stopper 18. The filter assembly can filter the circulating air, thereby ensuring the cleaning effect inside the valve and preventing debris from entering the valve body 4 and causing damage to the valve body 4. The installation sleeve 19 and the fastening bolts 21 are provided to facilitate the installation and replacement of the filter 20.

[0030] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A high negative pressure airtight valve for civil air defense, characterized in that: It comprises a valve seat (1), a mounting flange (2), a sealing ring (3), a valve body (4), a support block (5), a rotating shaft (6), a rotating disk (7), a sliding block (8), a touch switch (9), a flow meter (10), a moving mechanism (11), a sliding plate (12), a blocking block (13), a baffle (14) and a controller; The mounting flange (2) is arranged on the valve seat (1), the sealing ring a (3) is arranged on the mounting flange (2), the valve body (4) is rotatably arranged on the valve seat (1), the support block (5) is arranged on the valve seat (1), the rotating shaft (6) is rotatably arranged on the support block (5) and the rotating shaft (6) is connected to the valve body (4), the rotating disk (7) is arranged on the rotating shaft (6), the support block (5) is provided with a sliding groove (501), the sliding block (8) is slidably arranged in the sliding groove (501) and the sliding block (8) is connected to the rotating shaft (6), the touch switch (9) is arranged in the sliding groove (501), and the flow The meter (10) is arranged in the valve body (4), the moving mechanism (11) is arranged in the valve body (4), the sliding plate (12) is slidably arranged in the valve seat (1) and is connected to the moving mechanism (11), the blocking block (13) is arranged on the sliding plate (12), the baffle plate (14) is arranged inside the valve seat (1), and the baffle plate (14) is provided with an air vent (141), the outer diameter of the blocking block (13) is consistent with the inner diameter of the air vent (141), the controller is arranged on the valve seat (1), the touch switch (9) and the flow meter (10) are electrically connected to the controller, and the controller controls the connecting moving mechanism (11).

2. A high negative pressure airtight valve for civil air defense according to claim 1, characterized in that: When the rotating shaft (6) is rotated to the closed state, it abuts against the touch switch (9).

3. A high negative pressure airtight valve for civil air defense according to claim 1, characterized in that: The moving mechanism (11) and the flow meter (10) are arranged on the same side of the valve body (4), and the flow meter (10) is arranged on the left side of the moving mechanism (11).

4. A high negative pressure airtight valve for civil air defense according to claim 1, characterized in that: The moving mechanism (11) comprises a rotating motor (111), a rotating shaft (112), a connecting block (113) and a connecting rod (114); the rotating motor (111) is arranged in the valve seat (1); the rotating motor (111) drives the rotating shaft (112); the connecting block (113) is arranged on the sliding plate (12); one end of the connecting rod (114) is rotatably arranged on the rotating shaft (112); the other end of the connecting rod (114) is provided with a connecting groove (115); and the connecting block (113) is slidably arranged in the connecting groove (115).

5. A high negative pressure airtight valve for civil air defense according to claim 1, characterized in that: It also includes a plug (15), a sealing ring b (16) and a sealing ring c (17), wherein the plug (15) is arranged on the blocking block (13) and the plug (15) is arranged in a semicircular shape, the sealing ring b (16) is arranged on the blocking block (13), and the sealing ring c (17) is arranged on the air vent (141).

6. A high negative pressure airtight valve for civil air defense according to claim 1, characterized in that: The valve also comprises a stopper (18), which is arranged in the valve seat (1) and located on the right side of the flow meter (10).

7. A high negative pressure airtight valve for civil air defense according to claim 1, characterized in that: The invention also comprises a filter assembly, which comprises a mounting sleeve (19), a filter (20) and a fastening bolt (21), wherein the mounting sleeve (19) is arranged on the valve seat (1), the filter (20) is arranged on the mounting sleeve (19) by means of the fastening bolt (21), and the end of the filter (20) is inserted into the valve seat (1).

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