Self-detection and self-cut-off device for gas ball valve

Abstract

The invention belongs to the technical field of gas valves, and particularly relates to a self-detecting and self-cutting device for a gas ball valve. The structure design is reasonable, the first pressure sensor and the second pressure sensor are installed on the pipe walls of the protruding pipes on the two sides of the ball valve seat in an embedded mode respectively, the first pressure sensor and the second pressure sensor are connected with the controller, and when gas supply is stopped, whether in-pipe leakage occurs or not is judged by monitoring whether the pressure sensor at the output end has pressure or not; in the fuel gas supply process, whether pipe outside leakage occurs or not is judged by monitoring the pressure difference between the two sides, and the self-detection effect is good; when the gas flow needs to be precisely and finely adjusted, the second gas guide holes of the movable gas guide plate and the corresponding first gas guide holes are staggered, and precise fine adjustment is achieved in cooperation with a pressure sensor; when self-cut-off is needed, the first motor is used for driving the ball valve to rotate to conduct cut-off, and the second motor can be used for driving the movable air guide plate to rotate to achieve self-cut-off operation.

Description

Technical Field

[0001] The invention belongs to the technical field of gas valves, and in particular relates to a self-detection and self-cutoff device for a gas ball valve. Background Art

[0002] The self-detection and self-cut-off device of the gas ball valve is an important safety device, and its functions are mainly reflected in the following aspects: 1) Prevent gas leakage accidents: The self-detection and self-cut-off device of the gas ball valve monitors the gas concentration in the gas pipeline in real time through the built-in sensor. Once the sensor detects that the gas concentration exceeds the preset safety threshold, it indicates that there may be a gas leak. The device will immediately start the cut-off mechanism and close the gas valve, thereby effectively preventing the gas from continuing to leak and preventing serious accidents such as fire and explosion. 2) Protect personal safety: When gas leaks, people may be poisoned or even endanger their lives by inhaling toxic gases. The device can respond quickly to gas leaks, cut off the gas supply in a very short time, and reduce the time people are exposed to harmful environments, thereby protecting personal safety. 3) Reduce property losses: If gas leaks are not discovered and handled in time, they may cause accidents such as fire and explosion, causing serious damage to household property. The self-detection and self-cut-off device of the gas ball valve can cut off the gas supply at the first time, prevent the accident from further expanding, and thus reduce the damage caused by the leak. 4) Improve the safety of gas use: The device can not only automatically cut off the supply when gas leaks, but also promptly detect and deal with potential gas safety hazards through the self-detection function, thereby improving the overall safety of gas use.

[0003] The existing self-detection and self-cut-off device for gas ball valve still has some shortcomings. First, it cannot determine whether there is a leak by monitoring the pressure difference on both sides, and the self-detection effect is not ideal. Second, it cannot accurately adjust the gas flow rate, and the fine adjustment requires turning the ball valve, which increases wear and reduces the service life. Third, it uses a single motor, and when the motor fails, the self-cut-off operation cannot be achieved. Therefore, it is necessary to optimize and improve the existing self-detection and self-cut-off device for gas ball valve. Summary of the invention

[0004] The purpose of the present invention is to overcome the above problems existing in the conventional technology and to provide a self-detection and self-cut-off device for a gas ball valve.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a self-detection and self-cut-off device for a gas ball valve, comprising a ball valve seat, a ball valve, a first motor, a ball valve rotating shaft, a rotating positioning sleeve, a controller, a first pressure sensor and a second pressure sensor, wherein a ball valve is restricted in movement in the ball valve seat, a first motor is installed at the upper end of the ball valve seat, a ball valve rotating shaft extending into an inner cavity of the ball valve seat is installed at the output end of the first motor, a rotating positioning sleeve is fixed at the bottom end of the inner cavity of the ball valve seat, a non-circular plug-in groove for plugging with the ball valve rotating shaft is provided at the top end of the ball valve, a rotating positioning groove for plugging with the rotating positioning sleeve is provided at the bottom end of the ball valve, a first pressure sensor and a second pressure sensor are respectively embedded and installed in convex tube walls of the ball valve seat on both sides of the ball valve, a controller is installed on the outer side of the ball valve seat, and the controller is respectively connected to the first motor, the first pressure sensor and the second pressure sensor.

[0007] Furthermore, in the above-mentioned gas ball valve self-detection and self-cut-off device, a cylindrical channel is opened in the ball valve, a bushing is embedded and fixed on the inner wall of the cylindrical channel, a fixed air guide plate is fixed inside the bushing, a dynamic air guide plate is provided to limit the movement of the bushing close to the fixed air guide plate, a second motor is installed at the lower end of the ball valve seat, an output shaft of the second motor is connected to one end of the transmission shaft via an electromagnetic clutch, a first bevel gear is installed at the other end of the transmission shaft, and the first bevel gear is transmission-connected to the dynamic air guide plate via the second bevel gear.

[0008] Furthermore, in the above-mentioned gas ball valve self-detection and self-cut-off device, the fixed air guide plate includes a fixed air guide plate body, and the fixed air guide plate body is provided with a plurality of first air guide holes along the circumferential direction.

[0009] Furthermore, in the above-mentioned gas ball valve self-detection and self-cut-off device, the dynamic air guide plate includes a dynamic air guide plate body, and the dynamic air guide plate body is provided with a plurality of second air guide holes along the circumferential direction, and the specifications of the second air guide holes are equal to the specifications of the first air guide holes, and the outer periphery of the dynamic air guide plate body is provided with a third bevel gear meshing with the second bevel gear.

[0010] Furthermore, in the above-mentioned gas ball valve self-detection and self-cut-off device, the transmission shaft passes through the movable sleeve, and the electromagnetic clutch is installed in the ball valve seat.

[0011] Furthermore, in the above-mentioned gas ball valve self-detection and self-cut-off device, positioning cams are symmetrically provided on both sides of the second bevel gear, and an active cavity is opened in the ball valve to facilitate the movement of the transmission shaft, the first bevel gear, the second bevel gear and the positioning cam.

[0012] Furthermore, in the above-mentioned gas ball valve self-detection and self-cut-off device, a movable groove is provided in the bushing to facilitate the movement of the movable air guide plate, and an avoidance groove is provided at the bottom of the movable groove to facilitate the engagement of the second bevel gear part with the movable air guide plate.

[0013] Furthermore, in the above-mentioned gas ball valve self-detection and self-cut-off device, the second motor and the electromagnetic clutch are connected to the controller.

[0014] The beneficial effects of the present invention are:

[0015] 1. The convex pipe walls on both sides of the ball valve seat are respectively embedded with the first pressure sensor and the second pressure sensor, which are connected to the controller. When the gas supply stops, the output pressure sensor is monitored to determine whether there is leakage in the pipe. During the gas supply process, the pressure difference on both sides is monitored to determine whether there is leakage outside the pipe, and the self-detection effect is good.

[0016] 2. When it is necessary to precisely fine-tune the gas flow, start the second motor. The output shaft of the second motor drives the dynamic gas guide plate to rotate via the electromagnetic clutch, the transmission shaft, the first bevel gear, and the second bevel gear, so that the second gas guide hole of the dynamic gas guide plate is misaligned with the corresponding first gas guide hole, and precise fine-tuning is achieved in cooperation with the pressure sensor.

[0017] 3. When self-cutting is required, in addition to using the first motor to drive the ball valve to rotate for cutting, the second motor can also be used to drive the dynamic air guide plate to rotate, so that the second air guide hole of the dynamic air guide plate is completely staggered with the corresponding first air guide hole. When one of the motors fails, the self-cutting operation can still be achieved.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a connection diagram of the controller and the pressure sensor in the present invention;

[0022] Figure 3 It is a schematic diagram of the rotation principle of the ball valve in the present invention;

[0023] Figure 4 It is a schematic diagram of the principle of precise fine-tuning of the gas flow in the present invention;

[0024] Figure 5 It is a structural schematic diagram of the fixed air guide plate in the present invention;

[0025] Figure 6 It is a structural schematic diagram of the dynamic air guide plate in the present invention;

[0026] In the accompanying drawings, the reference numerals of the various components are as follows:

[0027] 1-ball valve seat, 2-ball valve, 3-first motor, 4-ball valve rotating shaft, 5-rotational positioning sleeve, 6-bushing, 7-fixed air guide plate, 701-fixed air guide plate body, 702-first air guide hole, 8-moving air guide plate, 801-moving air guide plate body, 802-second air guide hole, 803-third bevel gear, 9-second motor, 10-electromagnetic clutch, 11-transmission shaft, 12-first bevel gear, 13-second bevel gear, 14-controller, 15-first pressure sensor, 16-second pressure sensor. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] like Figure 1-Figure 2 As shown, this embodiment provides a self-detection and self-cut-off device for a gas ball valve, comprising a ball valve seat 1, a ball valve 2, a first motor 3, a ball valve rotating shaft 4, a rotating positioning sleeve 5, a controller 14, a first pressure sensor 15 and a second pressure sensor 16. The ball valve seat 1 has a ball valve 2 in a movable manner, the upper end of the ball valve seat 1 is mounted with a first motor 3, the output end of the first motor 3 is mounted with a ball valve rotating shaft 4 extending into the inner cavity of the ball valve seat 1, and the bottom end of the inner cavity of the ball valve seat 1 is fixed with a rotating positioning sleeve 4. The top of the ball valve 2 is provided with a non-circular plug-in groove for plugging with the ball valve rotating shaft 4, the bottom end of the ball valve 2 is provided with a rotating positioning groove for plugging with the rotating positioning sleeve 4, the convex pipe wall of the ball valve seat 1 on both sides of the ball valve 2 is respectively embedded with a first pressure sensor 15 and a second pressure sensor 16, the outer side of the ball valve seat 1 is mounted with a controller 14, and the controller 14 is respectively connected with the first motor 3, the first pressure sensor 15 and the second pressure sensor 16.

[0031] A specific application of this embodiment is: the convex pipe wall on both sides of the ball valve seat 1 is respectively embedded with a first pressure sensor 15 and a second pressure sensor 16, which are connected to the controller 14. When the gas supply stops, it is determined whether there is leakage in the pipe by monitoring whether there is pressure in the output end pressure sensor. During the gas supply process, it is determined whether there is leakage outside the pipe by monitoring the pressure difference on both sides, and the self-detection effect is good.

[0032] Embodiment 2

[0033] like Figure 1-Figure 6 As shown, this embodiment provides a self-detection and self-cut-off device for a gas ball valve, comprising a ball valve seat 1, a ball valve 2, a first motor 3, a ball valve rotating shaft 4, a rotating positioning sleeve 5, a controller 14, a first pressure sensor 15 and a second pressure sensor 16. The ball valve seat 1 has a ball valve 2 in a movable manner, the upper end of the ball valve seat 1 is mounted with a first motor 3, the output end of the first motor 3 is mounted with a ball valve rotating shaft 4 extending into the inner cavity of the ball valve seat 1, and the bottom end of the inner cavity of the ball valve seat 1 is fixed with a rotating positioning sleeve 4. The top of the ball valve 2 is provided with a non-circular plug-in groove for plugging with the ball valve rotating shaft 4, the bottom end of the ball valve 2 is provided with a rotating positioning groove for plugging with the rotating positioning sleeve 4, the convex pipe wall of the ball valve seat 1 on both sides of the ball valve 2 is respectively embedded with a first pressure sensor 15 and a second pressure sensor 16, the outer side of the ball valve seat 1 is mounted with a controller 14, and the controller 14 is respectively connected with the first motor 3, the first pressure sensor 15 and the second pressure sensor 16.

[0034] In this embodiment, a cylindrical channel is provided in the ball valve 2, and a bushing 6 is embedded and fixed in the inner wall of the cylindrical channel. A fixed air guide plate 7 is fixed inside the bushing 6, and a dynamic air guide plate 8 is provided to limit the movement of the bushing 6 close to the fixed air guide plate 7. A second motor 9 is installed at the lower end of the ball valve seat 1, and the output shaft of the second motor 9 is connected to one end of the transmission shaft 11 through an electromagnetic clutch 10, and a first bevel gear 12 is installed at the other end of the transmission shaft 11, and the first bevel gear 12 is transmission-connected to the dynamic air guide plate 8 through a second bevel gear 13.

[0035] In this embodiment, the fixed air guide plate 7 includes a fixed air guide plate body 701 , and the fixed air guide plate body 701 is provided with a plurality of first air guide holes 702 along the circumferential direction.

[0036] In this embodiment, the dynamic air guide plate 8 includes a dynamic air guide plate body 801, and the dynamic air guide plate body 801 is provided with a plurality of second air guide holes 802 along the circumferential direction. The specifications of the second air guide holes 802 are equal to those of the first air guide holes 702. The outer periphery of the dynamic air guide plate body 801 is provided with a third bevel gear 803 meshing with the second bevel gear 13.

[0037] In this embodiment, the transmission shaft 11 passes through the movable sleeve 5 , and the electromagnetic clutch 10 is installed in the ball valve seat 1 .

[0038] In this embodiment, positioning cams are symmetrically provided on both sides of the second bevel gear 13, and a movable cavity is opened in the ball valve 2 to facilitate the movement of the transmission shaft 11, the first bevel gear 12, the second bevel gear 13 and the positioning cams.

[0039] In this embodiment, a movable groove is opened in the bushing 6 to facilitate the movement of the dynamic air guide plate 8, and an avoidance groove is opened at the bottom of the movable groove to facilitate the engagement of the second bevel gear 13 with the third bevel gear 803 in the dynamic air guide plate 8.

[0040] In this embodiment, the second motor 9 and the electromagnetic clutch 10 are connected to the controller 14 .

[0041] A specific application of this embodiment is: when it is necessary to fine-tune the gas flow accurately, the second motor 9 is started, and the output shaft of the second motor 9 drives the dynamic air guide plate 8 to rotate through the electromagnetic clutch 10, the transmission shaft 11, the first bevel gear 12, and the second bevel gear 13, so that the second air guide hole 802 of the dynamic air guide plate 8 is misaligned with the corresponding first air guide hole 702, and the pressure sensor is cooperated to achieve accurate fine-tuning. When self-cutting is required, in addition to using the first motor 3 to drive the ball valve 2 to rotate for cutting, the second motor 9 can also be used to drive the dynamic air guide plate 8 to rotate, so that the second air guide hole 802 of the dynamic air guide plate 8 is completely misaligned with the corresponding first air guide hole 702.

[0042] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. Gas ball valve self-detection and self-cut-off device, characterized in that: It includes a ball valve seat, a ball valve, a first motor, a ball valve rotating shaft, a rotating positioning sleeve, a controller, a first pressure sensor and a second pressure sensor, wherein a ball valve is restricted in movement in the ball valve seat, a first motor is installed at the upper end of the ball valve seat, a ball valve rotating shaft extending into the inner cavity of the ball valve seat is installed at the output end of the first motor, a rotating positioning sleeve is fixed to the bottom end of the inner cavity of the ball valve seat, a non-circular plug-in groove for plugging with the ball valve rotating shaft is provided at the top of the ball valve, a rotating positioning groove for plugging with the rotating positioning sleeve is provided at the bottom end of the ball valve, a first pressure sensor and a second pressure sensor are respectively embedded and installed on the convex tube walls of the ball valve seat on both sides of the ball valve, a controller is installed on the outer side of the ball valve seat, and the controller is respectively connected to the first motor, the first pressure sensor and the second pressure sensor.

2. The self-detection and self-cut-off device for a gas ball valve according to claim 1, characterized in that: A cylindrical channel is provided in the ball valve, a bushing is embedded and fixed in the inner wall of the cylindrical channel, a fixed air guide plate is fixed inside the bushing, a dynamic air guide plate is provided to limit the movement of the bushing close to the fixed air guide plate, a second motor is installed at the lower end of the ball valve seat, an output shaft of the second motor is connected to one end of the transmission shaft via an electromagnetic clutch, a first bevel gear is installed at the other end of the transmission shaft, and the first bevel gear is transmission-connected to the dynamic air guide plate via the second bevel gear.

3. The self-detection and self-cut-off device for a gas ball valve according to claim 2, characterized in that: The fixed air guide plate comprises a fixed air guide plate body, and the fixed air guide plate body is provided with a plurality of first air guide holes along the circumferential direction.

4. The self-detection and self-cut-off device for a gas ball valve according to claim 3, characterized in that: The dynamic air guide plate includes a dynamic air guide plate body, which is provided with a plurality of second air guide holes along the circumferential direction, the specifications of the second air guide holes are equal to those of the first air guide holes, and a third bevel gear meshing with the second bevel gear is provided on the outer periphery of the dynamic air guide plate body.

5. The self-detection and self-cut-off device for a gas ball valve according to claim 4, characterized in that: The transmission shaft passes through the movable sleeve, and the electromagnetic clutch is installed in the ball valve seat.

6. The self-detection and self-cut-off device for a gas ball valve according to claim 5, characterized in that: Positioning cams are symmetrically arranged on both sides of the second bevel gear, and a movable cavity is opened in the ball valve to facilitate the movement of the transmission shaft, the first bevel gear, the second bevel gear and the positioning cam.

7. The self-detection and self-cut-off device for a gas ball valve according to claim 6, characterized in that: The bushing is provided with a movable groove for facilitating the movement of the movable air guide plate, and the bushing is provided with an avoidance groove at the bottom of the movable groove for facilitating the meshing of the second bevel gear part with the movable air guide plate.

8. The self-detection and self-cut-off device for a gas ball valve according to claim 7, characterized in that: The second motor and the electromagnetic clutch are connected to a controller.

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