Self-closing valve with micro-leakage monitoring function

Abstract

The self-closing valve comprises a valve body, a temperature sensing unit and a driving unit, a sliding block and a push rod are arranged in a cavity of the valve body, the sliding block is limited to slide in the vertical direction, the sliding block is provided with an inclined groove, the push rod is matched with the inclined groove in the sliding block through a connecting piece, and the temperature sensing unit and the driving unit are arranged in the cavity of the valve body. The push rod is driven to complete horizontal movement when the sliding block moves up and down; the end part of the push rod is connected with a sealing valve core, and the sealing valve core is configured to close or open a flow channel of the valve body in the horizontal movement process of the push rod; the temperature sensing unit is arranged on the upstream of the valve body, a trigger signal is generated when the temperature sensing unit senses the temperature change, and the driving unit is configured to drive the transmission assembly to drive the sliding block after receiving the trigger signal, so that the valve body flow channel is closed. The gas source can be cut off under the condition of micro leakage, and the product safety is improved.

Description

Technical Field

[0001] This application belongs to the technical field of gas valves, and particularly relates to a self-closing valve with micro-leakage monitoring. Background Art

[0002] Currently, many urban household users are equipped with self-closing valves, whose function is to respond to the gas pressure in the pipeline. When the pressure exceeds the standard or is too low, the self-closing valve cuts off the gas flow channel leading to the stove and the like. However, traditional self-closing valves do not have the function of micro-leakage detection. When there is a micro-leakage of gas, they cannot actively close the valve, presenting a safety hazard.

[0003] Therefore, there is an urgent need for a self-closing valve with micro-leakage monitoring function. Utility Model Content

[0004] The purpose of the present utility model is to disclose a self-closing valve with micro-leakage monitoring in order to overcome the problems of the prior art.

[0005] The purpose of the present utility model is achieved through the following technical solutions:

[0006] A self-closing valve with micro-leakage monitoring, the self-closing valve includes a valve body, a temperature sensing unit and a driving unit.

[0007] A slider and a push rod are arranged in the cavity of the valve body. The slider is restricted to slide in the vertical direction, and the slider is provided with an inclined groove. The push rod is matched with the inclined groove on the slider through a connecting piece, and the push rod is driven to complete horizontal movement when the slider moves up and down.

[0008] And a sealing valve core is connected to the end of the push rod. The sealing valve core is configured to complete the closing or opening of the flow channel of the valve body during the horizontal movement of the push rod.

[0009] The temperature sensing unit is arranged upstream of the valve body. When the temperature sensing unit senses a temperature change, a trigger signal is generated. The driving unit is configured to drive the transmission component to drive the slider to close the flow channel of the valve body after receiving the trigger signal.

[0010] According to a preferred embodiment, the driving unit is a motor, and the transmission component includes: a gear, a lead screw, an adjusting slider, a spring and a valve rod.

[0011] The lead screw is sleeved on the valve rod and is fixed in the axial direction and can rotate relative to the valve rod; the adjusting slider is connected with the external thread of the lead screw through an internal thread structure.

[0012] The output shaft gear on the motor meshes with the gear. The lead screw rotates with the gear. The adjusting slider is in threaded cooperation with the lead screw. When the lead screw rotates, the adjusting slider moves up and down.

[0013] The spring is sleeved on the valve stem and is arranged between the adjusting slider and the enlarged head at the bottom end of the valve stem. The spring is configured to drive the valve stem to move downward under the extrusion of the adjusting slider, so as to drive the slider and realize the closing of the valve body flow channel.

[0014] According to a preferred embodiment, a lower suction plate and a magnet are further arranged in the cavity of the valve body. The lower suction plate is fixed to the top side of the slider, the magnet is arranged on the top side of the lower suction plate, and the magnet is fixedly connected with the slider through a fixed connecting piece. The fixed connecting piece penetrates through the lower suction plate. The top side of the magnet is the end face of the enlarged head at the bottom end of the valve stem; the magnet is magnetically connected with the lower suction plate and / or the enlarged head at the bottom end of the valve stem.

[0015] According to a preferred embodiment, the magnetic force between the magnet and the enlarged head at the bottom end of the valve stem is greater than the magnetic force between the magnet and the lower suction plate.

[0016] According to a preferred embodiment, a first lifting handle and a second lifting handle are arranged at the top end of the valve stem. The first lifting handle is fixedly connected with the end of the valve stem, and the second lifting handle is arranged around the circumference of the valve stem and can drive the first lifting handle to move when opening the valve.

[0017] According to a preferred embodiment, a valve cover is arranged at the top end of the valve body, and the valve cover and the valve body are riveted and combined through a retaining ring.

[0018] According to a preferred embodiment, a PCB is fixed to the top end of the valve cover, and a battery box and a motor are fixed to the PCB; the lead screw, the adjusting slider and the valve stem are arranged in the central through hole of the battery box.

[0019] According to a preferred embodiment, a flowmeter is arranged upstream of the valve body.

[0020] According to a preferred embodiment, a thermal induction wire is arranged in the flowmeter, and the thermal induction wire and the PCB together form a temperature induction unit.

[0021] According to a preferred embodiment, a movable joint is arranged upstream of the flowmeter.

[0022] The main solution of the present invention and its various further alternative solutions described above can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed by the present invention. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of the present invention, and all of them are the technical solutions to be protected by the present invention, and are not enumerated here.

[0023] The beneficial effects of the present invention:

[0024] This self - closing valve is practical and convenient, with a long service life. It can cut off the gas source in case of micro - leakage, increasing the product safety and further ensuring personal safety. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the self - closing valve of the present utility model;

[0026] Figure 2 is a schematic diagram of the motor position of the self - closing valve of the present utility model;

[0027] Among them, 1 - self - closing valve, 2 - valve body, 3 - flowmeter, 4 - movable joint, 5 - slider, 6 - push rod, 7 - lower suction plate, 8 - magnet, 9 - valve cover, 10 - PCB, 11 - battery box, 12 - motor, 13 - gear, 14 - lead screw, 15 - adjusting slider, 16 - valve rod, 17 - first lifting handle, 18 - protective cover, 19 - second lifting handle, 20 - thermal induction wire, 21 - sealing valve core, 22 - spring, 23 - retaining ring. Detailed Embodiments

[0028] The following specific examples illustrate the embodiments of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0029] It should be noted that: Similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0031] In addition, terms such as "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, it should be pointed out in the present invention that in the present invention, if the specific structures, connection relationships, position relationships, power source relationships, etc. involved are not specifically written, the structures, connection relationships, position relationships, power source relationships, etc. involved in the present invention are all those that can be known to those skilled in the art on the basis of the prior art without creative labor.

[0034] Embodiment 1

[0035] Reference Figure 1 and Figure 2 As shown in the figure, a self-closing valve 1 with micro-leakage monitoring is shown in the figure. The self-closing valve 1 includes a valve body 2, a temperature sensing unit and a driving unit.

[0036] Preferably, a slider 5 and a push rod 6 are provided in the cavity of the valve body 2. The slider 5 is restricted to slide in the vertical direction, and the slider 5 is provided with an inclined groove. The push rod 6 is matched with the inclined groove on the slider 5 through a connecting member, and the push rod 6 is driven to complete horizontal movement when the slider 5 moves up and down.

[0037] Preferably, a sealing valve core 21 is connected to the end of the push rod 6. The sealing valve core 21 is configured to close or conduct the flow channel of the valve body 2 during the horizontal movement of the push rod 6.

[0038] Preferably, the temperature sensing unit is arranged upstream of the valve body 2. When the temperature sensing unit senses a temperature change, a trigger signal is generated. The driving unit is configured to drive the transmission component to drive the slider 5 after receiving the trigger signal to close the flow channel of the valve body 2.

[0039] Preferably, the driving unit is a motor 12, and the transmission component includes: a gear 13, a lead screw 14, an adjusting slider 15, a spring 22 and a valve rod 16.

[0040] The lead screw 14 is sleeved on the valve stem 16, and its position is fixed in the axial direction, and it can rotate relative to the valve stem 16, that is, the lead screw 14 can only rotate relative to the valve stem 16 and cannot move up and down.

[0041] The adjusting slider 15 is sleeved on the lead screw 14, and the adjusting slider 15 is connected to the external thread of the lead screw 14 through an internal thread structure. The output shaft gear 13 on the motor 12 meshes with the gear 13. The lead screw 14 rotates with the gear 13. The adjusting slider 15 is in threaded cooperation with the lead screw 14. When the lead screw 14 rotates, the adjusting slider 15 moves up and down.

[0042] The spring 22 is sleeved on the valve stem 16 and is arranged between the adjusting slider 15 and the enlarged head at the bottom end of the valve stem 16. The spring 22 is configured to drive the valve stem 16 to move downward under the extrusion of the adjusting slider 15, so as to drive the slider 5 to realize the closing of the flow channel of the valve body 2.

[0043] Further, a lower suction plate 7 and a magnet 8 are also arranged in the cavity of the valve body 2. The lower suction plate 7 is fixed to the top side of the slider 5. The magnet 8 is arranged on the top side of the lower suction plate 7, and the magnet 8 is fixedly connected to the slider 5 through a fixed connecting piece. The fixed connecting piece penetrates through the lower suction plate 7. The top side of the magnet 8 is the end face of the enlarged head at the bottom end of the valve stem 16.

[0044] The magnet 8 is magnetically connected to the lower suction plate 7 and / or the enlarged head at the bottom end of the valve stem 16. The magnetic force between the magnet 8 and the enlarged head at the bottom end of the valve stem 16 is greater than the magnetic force between the magnet 8 and the lower suction plate 7.

[0045] Preferably, a sealing diaphragm is arranged between the enlarged head at the bottom end of the valve stem 16 and the side wall of the valve body 2 to complete the sealing of the inner cavity of the valve body 2.

[0046] Preferably, a first lifting handle 17 and a second lifting handle 19 are arranged at the top end of the valve stem 16. The first lifting handle 17 is fixedly connected to the end of the valve stem 16. The second lifting handle 19 is arranged around the circumference of the valve stem 16 and can drive the first lifting handle 17 to move when opening the valve.

[0047] Preferably, a valve cover 9 is arranged at the top end of the valve body 2. The valve cover 9 and the valve body 2 are riveted together through a pressing ring 23.

[0048] Further, a PCB 10 is fixed to the top end of the valve cover 9. A battery box 11 and a motor 12 are fixed to the PCB 10. The lead screw 14, the adjusting slider 15 and the valve stem 16 are arranged in the central through hole of the battery box 11.

[0049] Preferably, a flowmeter 3 is arranged upstream of the valve body 2.

[0050] Furthermore, a thermal induction wire 20 is provided inside the flowmeter 3, and the thermal induction wire 20 and the PCB 10 together constitute a temperature sensing unit.

[0051] Preferably, a movable joint 4 is provided upstream of the flowmeter 3 to facilitate the connection of the upstream pipe body.

[0052] When a micro-leakage occurs, the air flow will flow through the internal channel of the valve body. The thermal induction wire 20 will change its temperature as it follows the air flow. This temperature change is converted into an electrical signal and sent to the PCB 10. The PCB 10 sends a corresponding trigger signal to the motor 12. The motor 12 rotates and drives the gear 13. The gear 13 rotates and drives the lead screw 14. The rotation of the lead screw 14 causes the adjustment slider 15 to move downward. The adjustment slider 15 presses the spring 22, and the spring 22 exerts a downward force on the enlarged head at the end of the valve stem 16, forcing the valve stem 16, the magnet 8, and the slider 5 to move downward. At this time, the push rod 6 moves to the right and pulls the sealing valve core 21 inside the flowmeter 3 to close the valve. Thus, automatic valve closing during micro-leakage is achieved.

[0053] If valve opening is required, the second lifting knob 19 can be lifted upward to make the valve stem 16 move upward, thereby driving the magnet 8 and the slider 5 to move upward. At this time, the push rod 6 moves to the left and pushes the sealing valve core 21 inside the flowmeter 3 to open the valve body channel.

[0054] When the pressure of the gas (coal gas) flowing into the valve body is too high, the gas pushes the sealing diaphragm upward, and thus the sealing diaphragm drives the valve stem 16 to move upward until the valve stem 16 separates from the magnet 8. At this time, under the action of the lower suction plate 7, the magnet 8 moves downward. Correspondingly, the slider 5 moves downward. At this time, the push rod 6 moves to the right and pulls the sealing valve core 21 inside the flowmeter 3 to close the valve.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A self-closing valve with micro-leakage monitoring, characterized in that: The self-closing valve (1) comprises a valve body (2), a temperature sensing unit and a driving unit. A slider (5) and a push rod (6) are provided in the cavity of the valve body (2); the slider (5) is restricted to slide in the vertical direction, and the slider (5) is provided with an inclined groove; the push rod (6) cooperates with the inclined groove on the slider (5) via a connecting piece, and the push rod (6) is driven to complete horizontal movement when the slider (5) moves up and down; The end of the push rod (6) is connected to a sealing valve core (21), and the sealing valve core (21) is configured to complete the closing or opening of the flow channel of the valve body (2) during the horizontal movement of the push rod (6); The temperature sensing unit is arranged upstream of the valve body (2), and generates a trigger signal when the temperature sensing unit senses a temperature change. The drive unit is configured to drive the transmission assembly to drive the slider (5) after receiving the trigger signal, thereby achieving closure of the flow channel of the valve body (2).

2. The self-closing valve according to claim 1, wherein The driving unit is a motor (12), and the transmission assembly comprises: a gear (13), a screw rod (14), an adjusting slider (15), a spring (22) and a valve stem (16). The screw rod (14) is sleeved on the valve stem (16) and fixed in the axial direction and can rotate relative to the valve stem (16); the adjusting slider (15) is connected to the external thread of the screw rod (14) through the internal thread structure; The output shaft gear on the motor (12) meshes with the gear (13), the screw rod (14) rotates with the gear (13), the adjusting slider (15) is threadedly matched with the screw rod (14), and when the screw rod (14) rotates, the adjusting slider (15) moves up and down; The spring (22) is sleeved on the valve stem (16) and is arranged between the adjusting slider (15) and the enlarged head at the bottom end of the valve stem (16). The spring (22) is configured to drive the valve stem (16) to move downward under the pressure of the adjusting slider (15), thereby driving the slider (5) to achieve the closure of the flow channel of the valve body (2).

3. The self-closing valve according to claim 2, characterized in that: A lower suction plate (7) and a magnet (8) are also provided in the cavity of the valve body (2). The lower suction plate (7) is fixed to the top side of the slider (5), the magnet (8) is arranged on the top side of the lower suction plate (7), and the magnet (8) is fixedly connected to the slider (5) via a fixed connection piece, the fixed connection piece is arranged through the lower suction plate (7), and the top side of the magnet (8) is the enlarged head end face of the bottom end of the valve stem (16); The magnet (8) is magnetically connected to the enlarged bottom end of the lower suction plate (7) and / or the valve stem (16).

4. The self-closing valve according to claim 3, characterized in that: The magnetic force between the magnet (8) and the enlarged head at the bottom end of the valve stem (16) is greater than the magnetic force between the magnet (8) and the lower suction plate (7).

5. The self-closing valve according to claim 2, wherein, A first lifting button (17) and a second lifting button (19) are provided at the top end of the valve stem (16); the first lifting button (17) is fixedly connected to the end of the valve stem (16); the second lifting button (19) is arranged around the circumference of the valve stem (16) and can drive the first lifting button (17) to move when the valve is opened.

6. The self-closing valve according to claim 2, characterized in that, A valve cover (9) is provided at the top end of the valve body (2), and the valve cover (9) and the valve body (2) are riveted together via a pressure ring (23).

7. The self-closing valve according to claim 6, characterized in that, A PCB (10) is fixed to the top end of the valve cover (9), and a battery box (11) and a motor (12) are fixed to the PCB (10); the lead screw (14), the adjusting slider (15) and the valve stem (16) are arranged in the central through hole of the battery box (11).

8. The self-closing valve according to claim 7, characterized in that, A flowmeter (3) is provided upstream of the valve body (2).

9. The self-closing valve according to claim 8, wherein, A thermal induction wire (20) is provided in the flowmeter (3), and the thermal induction wire (20), the thermal induction wire (20) and the PCB (10) together form a temperature induction unit.

10. The self-closing valve according to claim 8, wherein, A movable joint (4) is provided upstream of the flowmeter (3).

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