A vehicle-mounted chemical protection and gas filtering ventilation shut-off valve

Abstract

The present invention discloses a vehicle-mounted chemical and gas filtering ventilation shut-off valve, the main device of which is a motor mounting cover (1) and an inlet valve outer tube (2) fixedly connected; a motor gear (4) is integrally connected to a motor (3) shaft and meshes with a gear (20) on an upper clutch (7); the upper clutch (7) is sleeved on a rotating shaft (6), and a lower clutch (8) is fixedly connected to the rotating shaft (6); a mechanism mounting plate (15) is fixedly connected to the upper edge of the inlet valve outer tube (2), and the rotating shaft (6) is movably sleeved therein; a tension spring (16) is sleeved outside the rotating shaft (6), and its upper end is fixedly connected to the mechanism mounting plate (15), and its lower end is fixedly connected to a valve plate (17); the motor (3) and a PCB board (13) are both mounted on the mechanism mounting plate (15). The vehicle-mounted chemical and gas filtering ventilation shut-off valve using the present invention has the advantages of small size, fast switching, communication linkage, stable performance, etc.

Description

Technical Field

[0001] The invention belongs to the field of valves, and in particular relates to a vehicle-mounted chemical protection and gas filtering ventilation shut-off valve. Background Art

[0002] The chemical and gas filter ventilation shut-off valve is a device used to close the gas filter ventilation air inlet of the chemical and gas defense three-defense system. The device is installed at the three-defense gas filter ventilation air inlet of special vehicles. It is required to be sturdy, reliable, and have certain impact resistance. It is in a closed state during normal and isolated ventilation. When the vehicle needs three-defense ventilation (clean ventilation or gas filter ventilation), the gas filter ventilation shut-off valve is in an open state. The opening time of the chemical and gas filter ventilation shut-off valve will affect the overpressure establishment time of the three-defense system and the protection performance of the gas filter ventilation system. Therefore, the opening time of the shut-off valve is not more than 150 milliseconds. After opening, it cannot generate ventilation resistance of the gas filter ventilation system. At the same time, automatic control is required to ensure linkage with various components of the three-defense gas filter ventilation system. When the three-defense ventilation command is received, the shut-off valve will open quickly to ensure the realization of gas filter ventilation. However, at present, such devices are not installed on special vehicles. Even if they are installed, they are mostly made of rubber and plastic materials with poor air tightness. Leakage often occurs in the isolated ventilation state. Manual operation has a slow response time and cannot ensure the rapid realization of gas filter ventilation. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned problem and to design a vehicle-mounted chemical protection and gas filtering ventilation shut-off valve.

[0004] A vehicle-mounted chemical and gas filtering ventilation shut-off valve mainly comprises a motor mounting cover and an inlet valve outer cylinder, wherein the motor mounting cover and the inlet valve outer cylinder are fixedly connected; further comprising a motor, a motor gear, an upper clutch, an upper clutch gear, a lower clutch, a rotating shaft, a PCB board, a mechanism mounting disk, a tension spring, and a valve plate; the motor gear is fixedly connected to the motor shaft on the motor and meshes with the upper clutch gear; the upper clutch and the upper clutch gear are integrally mounted on the rotating shaft, and the lower clutch is fixedly connected to the rotating shaft; the mechanism mounting disk is fixedly connected to the upper edge of the inlet valve outer cylinder, a circular hole is provided in the middle, the rotating shaft is mounted therein and can reciprocate longitudinally; the tension spring is mounted outside the rotating shaft, the upper end of the tension spring is fixedly connected to the mechanism mounting disk, and the lower end of the tension spring is fixedly connected to the valve plate; the motor is mounted on the mechanism mounting disk; the PCB board is mounted on the mechanism mounting disk.

[0005] Furthermore, it also includes a motor mounting frame and a PCB mounting frame; the motor is mounted on the motor mounting frame and fixed together on the mechanism mounting plate; the PCB board is mounted on the PCB mounting frame and fixed together on the mechanism mounting plate;

[0006] Furthermore, it also includes an outer edge of a lower clutch, an upper limit switch, and a lower limit switch; the outer edge of the lower clutch is a protrusion in the middle part of the lower clutch; the upper limit switch and the lower limit switch are installed on the motor mounting frame;

[0007] Furthermore, it also includes a lower clutch limiting pin and a limiting hole, wherein the lower clutch is locked in the limiting hole on the rotating shaft through the lower clutch limiting pin to achieve fixed connection with the rotating shaft;

[0008] Furthermore, it also includes an M14 nut, through which the valve plate is screw-fixedly connected to the lower end of the rotating shaft;

[0009] Furthermore, it also includes a sealing gasket, which is fixedly mounted on the groove below the valve plate;

[0010] Furthermore, it also includes an aviation plug, which is fixedly mounted on the hole on the side of the inlet valve outer cylinder.

[0011] A vehicle-mounted chemical protection and gas filtering and ventilation shut-off valve manufactured using the technical solution of the present invention overcomes the safety hazards of the original manual switching and realizes a miniaturized design to meet the needs of the gas filtering and ventilation system; it can not only solve the problem of rapid switching, but also communicate and link with the gas filtering and ventilation system, with stable and reliable performance, and is sturdy and durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is an exploded view of the structure of a vehicle-mounted chemical protection and gas filtering ventilation shut-off valve of the present invention;

[0013] Figure 2 It is a schematic diagram of a valve body of a vehicle-mounted chemical protection and gas filtering ventilation shut-off valve when it is closed;

[0014] Figure 3 It is a schematic diagram of a valve body of a vehicle-mounted chemical protection and gas filtering ventilation shut-off valve when it is closed;

[0015] Figure 4 It is a schematic diagram of a valve body of a vehicle-mounted chemical protection and gas filtering ventilation shut-off valve when it is opened;

[0016] Figure 5 It is a schematic diagram of a valve body of a vehicle-mounted chemical protection and gas filtering ventilation shut-off valve when it is opened.

[0017] In the figure, 1. motor mounting cover; 2. inlet valve outer cylinder; 3. motor; 4. motor gear; 5. motor mounting frame; 6. rotating shaft; 7. upper clutch; 8. lower clutch; 9. upper limit switch; 10. lower limit switch; 11. lower clutch limit pin; 12. PCB board mounting frame; 13. PCB board; 14. M14 nut; 15. mechanism mounting plate; 16. tension spring; 17. valve plate; 18. sealing gasket; 19. aviation plug; 20. upper clutch gear; 21. lower clutch outer edge; 22. limit hole. DETAILED DESCRIPTION

[0018] In order to better understand the present invention, the present invention is described in detail below with reference to the accompanying drawings. Figure 1 As shown:

[0019] A vehicle-mounted anti-chemical and anti-gas filtering ventilation shut-off valve, mainly comprising a motor mounting cover 1, an inlet valve outer tube 2, wherein the motor mounting cover 1 and the inlet valve outer tube 2 are fixedly connected by M4 screws; further comprising a motor 3, a motor gear 4, an upper clutch 7, an upper clutch gear 20, a lower clutch 8, a rotating shaft 6, a motor mounting frame 5, a lower clutch limit pin 11, a PCB board mounting frame 12, a PCB board 13, a mechanism mounting plate 15, a tension spring 16, a valve plate 17, and a limit hole 22; the motor gear 4 is fixedly connected to the motor shaft on the motor 3 by an M4 flat-end set screw, and is fixedly connected to the upper clutch The gear 20 is meshed; the upper clutch gear 20 and the upper clutch 7 are an integral structure and are mounted on the rotating shaft 6; the lower clutch limit pin 11 passes through the lower clutch 8 and is locked in the limit hole 22 set on the rotating shaft 6 to achieve a fixed connection with the rotating shaft 6; the mechanism mounting plate 15 is fixedly connected to the upper edge of the inlet valve outer tube 2 by screws, and a circular hole is set in the middle, and the rotating shaft 6 is mounted therein and can reciprocate longitudinally; since the rotating shaft 6 is provided with an axial groove, the GB1096 The C-shaped flat key pin controls the rotating shaft 6 to move longitudinally but not to rotate; the tension spring 16 is sleeved on the outside of the rotating shaft 6, and its upper end is fixedly connected to the groove below the mechanism mounting plate 15, and its lower end is fixedly connected to the groove above the valve plate 17; the valve plate 17 is fixedly connected to the lower end screw of the rotating shaft 6 through the M14 nut 14; the motor 3 is mounted on the motor mounting frame 5 and fixed to the mechanism mounting plate 15 together with the M4 screws; the PCB board 13 is mounted on the PCB board mounting frame 12 and fixed to the mechanism mounting plate 15 together with the M4 screws; and also includes the outer edge 2 of the lower clutch 1, upper limit switch 9, lower limit switch 10; the lower clutch outer edge 21 is a protrusion in the middle part of the lower clutch 8; the upper limit switch 9 and the lower limit switch 10 are installed on the motor mounting frame 10 by M2 screws, and are placed at the upper and lower activity limits of the lower clutch outer edge 21 for signal generation and transmission; it also includes a sealing gasket 18, which is fixedly mounted on the groove under the valve plate 17; it also includes an aviation plug 19, which is fixedly mounted on the hole on the side of the inlet valve outer tube 2; it has three plugs, one is a power cord; the other two are one-in and one-out signal control lines.

[0020] During actual operation, the control system inputs the closing signal to the PCB board 13 through the KAN communication signal line, and the controller on the PCB board 13 inputs a DC24V voltage to the motor 3. The motor 3 drives the motor gear 4 to rotate counterclockwise, driving the meshed upper clutch gear 20 and the upper clutch 7 to rotate clockwise; since the upper end of the upper clutch gear 20 is restricted from moving upward by the motor mounting cover 1, it can only rotate on the original axis; due to the spiral design, the upper clutch 7 drives the lower clutch 8 to integrally drive the rotating shaft 6, the valve plate 17, and the sealing gasket 18 to move downward to close and seal with the lower edge of the inlet valve outer tube 2; since the upper end of the tension spring 16 is connected to the mechanical mounting cover 1, the upper end of the tension spring 16 is connected to the mechanical mounting cover 1. The mounting plate 15 is fixed, and the mechanical mounting plate 15 is fixedly connected to the upper edge of the inlet valve outer tube 2, and its lower end is fixedly connected to the valve plate 17 through the M14 nut 14. At this time, the tension spring 16 is in a stretched state; due to the downward movement of the lower clutch 8, its lower clutch outer edge 21 triggers the lower limit switch 10, and the lower limit switch 10 sends a closing signal to the PCB board 13, and the controller on the PCB board 13 stops inputting DC24V voltage to the motor 3, and the motor 3 stops rotating; at this time, the upper clutch 7 and the lower clutch 8, and the valve plate 17 are temporarily in a relatively static and stable state because their upper and lower ends are fixed. At this time, the valve state is closed, such as Figure 2 , Figure 3 shown.

[0021] When the control system inputs the opening signal to the PCB board 13 through the KAN communication signal line, the controller on the PCB board 13 inputs a DC24V voltage to the motor 3, and the motor 3 drives the motor gear 4 to continue to rotate counterclockwise, driving the meshed upper clutch gear 20 and the upper clutch 7 to rotate clockwise; because the upper clutch 7 and the lower clutch 8 are already in a relatively static and stable state, only a small part is in contact; based on this special design, the upper clutch 7 and the lower clutch 8 are immediately disengaged with a slight rotation; because the tension spring 16 is in a stretched state in the early stage, and the upper end is in contact with the The mechanical mounting plate 15 is fixed to the upper edge of the inlet valve outer tube 2. Under the retraction force of the tension spring 16, the valve plate 17 and the sealing gasket 18 are quickly separated from the lower edge of the inlet valve outer tube 2, and return to their original position together with the lower clutch 8, and the valve is opened; at this time, the outer edge 21 of the lower clutch triggers the upper limit switch 9, and the upper limit switch 9 sends an opening signal to the PCB board 13, and the controller on the PCB board 13 stops inputting DC24V voltage to the motor 3, and the motor 3 stops rotating; the upper clutch 7 and the lower clutch 8 are in the meshing return state; at this time, the valve state is open, such as Figure 4 , Figure 5 As shown; this cycle process is completed and the next process begins.

[0022] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A vehicle-mounted chemical protection and gas filtering ventilation shut-off valve, characterized in that: The invention mainly comprises a motor mounting cover (1) and an inlet valve outer cylinder (2), wherein the motor mounting cover (1) and the inlet valve outer cylinder (2) are fixedly connected; and further comprises a motor (3), a motor gear (4), an upper clutch (7), an upper clutch gear (20), a lower clutch (8), a rotating shaft (6), a PCB board (13), a mechanism mounting plate (15), a tension spring (16), and a valve plate (17); The motor gear (4) is fixedly connected to the motor shaft on the motor (3) and meshes with the upper clutch gear (20); the upper clutch (7) and the upper clutch gear (20) are integrally mounted on the rotating shaft (6), and the lower clutch (8) is fixedly connected to the rotating shaft (6); the mechanism mounting plate (15) is fixedly connected to the upper edge of the inlet valve outer tube (2), and a circular hole is provided in the middle thereof, and the rotating shaft (6) is mounted therein and can reciprocate longitudinally; the tension spring (16) is mounted outside the rotating shaft (6), and its upper end is fixedly connected to the mechanism mounting plate (15), and its lower end is fixedly connected to the valve plate (17); the motor (3) is mounted on the mechanism mounting plate (15); and the PCB board (13) is mounted on the mechanism mounting plate (15); It also comprises a motor mounting frame (5) and a PCB mounting frame (12); the motor (3) is mounted on the motor mounting frame (5) and fixed together on the mechanism mounting plate (15); the PCB board (13) is mounted on the PCB mounting frame (12) and fixed together on the mechanism mounting plate (15); It also includes a lower clutch outer edge (21), an upper limit switch (9), and a lower limit switch (10); the lower clutch outer edge (21) is a protrusion in the middle part of the lower clutch (8); the upper limit switch (9) and the lower limit switch (10) are mounted on the motor mounting frame (5); When the outer edge (21) of the lower clutch triggers the upper limit switch (9), the upper limit switch (9) sends an opening signal to the PCB board (13), causing the motor (3) to stop rotating; When the outer edge (21) of the lower clutch triggers the lower limit switch (10), the lower limit switch (10) sends a closing signal to the PCB board (13), causing the motor (3) to stop rotating; It also includes a lower clutch limiting pin (11) and a limiting hole (22); the lower clutch (8) is locked in the limiting hole (22) arranged on the rotating shaft (6) through the lower clutch limiting pin (11), thereby realizing a fixed connection with the rotating shaft (6); It also includes an M14 nut (14), and the valve plate (17) is screw-fixedly connected to the lower end of the rotating shaft (6) via the M14 nut (14).

2. The vehicle-mounted chemical protection and gas filtering ventilation shut-off valve according to claim 1 is characterized in that: It also comprises a sealing gasket (18), wherein the sealing gasket (18) is fixedly mounted on the groove below the valve plate (17).

3. The vehicle-mounted chemical protection and gas filtering ventilation shut-off valve according to claim 1 is characterized in that: It also includes an aviation plug (19), which is fixedly mounted on a hole on the side of the inlet valve outer tube (2).

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