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, a chute is formed in the sliding block, the push rod is matched with the chute 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] The present application belongs to the technical field of gas valves, and in particular relates to a self-closing valve with micro-leakage monitoring. Background Art

[0002] At present, many urban households have installed self-closing valves, which 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 airflow channel to the stove, etc. However, traditional self-closing valves do not have micro-leak detection functions. When a micro-leak occurs, the valve cannot be actively closed, which poses a safety hazard.

[0003] Therefore, there is an urgent need for a self-closing valve with a micro-leakage monitoring function. Summary of the invention

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

[0005] The object of the present invention is achieved through the following technical solutions:

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

[0007] A slider and a push rod are provided in the cavity of the valve body. The slider is limited to slide in the vertical direction, and the slider is provided with an inclined groove. The push rod cooperates 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] The end of the push rod is connected to a sealing valve core, and the sealing valve core is configured to complete the closing or opening of the valve body flow channel during the horizontal movement of the push rod;

[0009] The temperature sensing unit is arranged upstream of the valve body, and generates a trigger signal when the temperature sensing unit senses a temperature change. The driving unit is configured to drive the transmission assembly to drive the slider after receiving the trigger signal, thereby achieving closure of the valve body flow channel.

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

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

[0012] The output shaft gear on the motor meshes with the gear, the screw rotates with the gear, the adjusting slider cooperates with the screw thread, and the adjusting slider moves up and down when the screw rotates;

[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 pressure of the adjusting slider, thereby driving the slider to achieve the closure of the valve body flow channel.

[0014] According to a preferred embodiment, a lower suction plate and a magnet are also provided 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 to the slider via a fixed connecting piece, the fixed connecting piece runs through the lower suction plate, and 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 to 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 button and a second lifting button are provided at the top end of the valve stem, the first lifting button is fixedly connected to the end of the valve stem, and the second lifting button is arranged around the circumference of the valve stem and can drive the first lifting button to move when the valve is opened.

[0017] According to a preferred embodiment, a valve cover is provided on the top of the valve body, and the valve cover is combined with the valve body by riveting with a pressure ring.

[0018] According to a preferred embodiment, a PCB is fixed to the top of the valve cover, and a battery box and a motor are fixed on the PCB; the screw rod, 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 flow meter is provided upstream of the valve body.

[0020] According to a preferred embodiment, a heat sensing wire is provided in the flow meter, and the heat sensing wire, the heat sensing wire and the PCB together constitute a temperature sensing unit.

[0021] According to a preferred embodiment, a movable joint is provided upstream of the flow meter.

[0022] The aforementioned main scheme of the present invention and its further options can be freely combined to form multiple schemes, all of which are schemes that can be adopted and claimed for protection by the present invention. After understanding the scheme of the present invention, those skilled in the art can understand that there are multiple combinations based on the prior art and common knowledge, all of which are technical schemes to be protected by the present invention, and they are not exhaustively listed here.

[0023] Beneficial effects of the present invention:

[0024] The self-closing valve is practical and convenient, has a long service life, and can cut off the gas source in the event of a slight leak, thereby increasing product safety and further ensuring personal safety. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0027] Among them, 1- self-closing valve, 2- valve body, 3- flow meter, 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- screw rod, 15- adjusting slider, 16- valve stem, 17- first lifting button, 18- protective cover, 19- second lifting button, 20- heat sensing wire, 21- sealing valve core, 22- spring, 23- pressure ring. DETAILED DESCRIPTION

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

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the present invention should be pointed out that, in the present invention, unless the specific structure, connection relationship, positional relationship, power source relationship, etc. are specifically written out, the structure, connection relationship, positional relationship, power source relationship, etc. involved in the present invention are all known by those skilled in the art on the basis of the prior art without creative work.

[0034] Example 1

[0035] refer to Figure 1 and Figure 2 As shown, the figure shows a self-closing valve 1 with micro-leakage monitoring, and 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 cooperates 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 , and the sealing valve core 21 is configured to close or open 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, and generates a trigger signal when the temperature sensing unit senses a temperature change. The driving unit is configured to drive the transmission assembly to drive the slider 5 after receiving the trigger signal to achieve the closure of the flow channel of the valve body 2.

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

[0040] The screw rod 14 is sleeved on the valve stem 16 and is fixed in the axial direction and can rotate relative to the valve stem 16 , that is, the screw rod 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 screw rod 14, and the adjusting slider 15 is connected with the external thread of the screw rod 14 through the internal thread structure. The output shaft gear 13 on the motor 12 is meshed with the gear 13, the screw rod 14 rotates with the gear 13, and the adjusting slider 15 is threadedly matched with the screw rod 14. When the screw rod 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 squeezing of the adjusting slider 15, thereby driving the slider 5 to achieve the closure of the flow channel of the valve body 2.

[0043] Furthermore, 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, and 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, and 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.

[0044] The magnet 8 is magnetically connected with the bottom enlarged head of the lower suction plate 7 and / or the valve stem 16. The magnetic force between the magnet 8 and the bottom enlarged head 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 provided 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 button 17 and a second lifting button 19 are provided at the top of the valve stem 16, the first lifting button 17 is fixedly connected to the end of the valve stem 16, and 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.

[0047] Preferably, a valve cover 9 is provided at the top end of the valve body 2 , and the valve cover 9 is riveted and pressed together with the valve body 2 via a pressure ring 23 .

[0048] Furthermore, a PCB 10 is fixed to the top of the valve cover 9 , and a battery box 11 and a motor 12 are fixed to the PCB 10 ; the screw rod 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 flow meter 3 is provided upstream of the valve body 2 .

[0050] Furthermore, a heat sensing wire 20 is provided in the flow meter 3, and the heat sensing wire 20 and the PCB 10 together constitute a temperature sensing unit.

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

[0052] When a micro-leakage occurs, the airflow will flow in the internal channel of the valve body, and the temperature of the heat-sensing wire 20 will change with the flow of the airflow. The temperature change is converted into an electrical signal to the PCB10, and the PCB10 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 screw rod 14. The screw rod 14 rotates to move the adjustment slider 15 downward. The adjustment slider 15 squeezes 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 flow meter 3 to seal and close the valve. Thereby, automatic valve closing is achieved when a micro-leakage occurs.

[0053] If the valve needs to be opened, the second lifting button 19 can be lifted upward to move the valve stem 16 upward, thereby driving the magnet 8 and the slider 5 to move upward. At this time, the push rod 6 moves left and pushes the sealing valve core 21 inside the flow meter 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 the sealing diaphragm drives the valve stem 16 to move upward until the valve stem 16 is separated from the magnet 8. At this time, the magnet 8 moves downward under the action of the lower suction plate 7, and the slider 5 moves downward accordingly. At this time, the push rod 6 moves to the right and pulls the sealing valve core 21 inside the flow meter 3 to seal and close the valve.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-closing valve with micro-leakage monitoring, It is 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, It is characterized in that 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, It is 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, It is 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, It is characterized in that 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, It is 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, It is characterized in that A PCB (10) is fixed to the top of the valve cover (9), and a battery box (11) and a motor (12) are fixed to the PCB (10); the screw rod (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, It is characterized in that A flow meter (3) is provided upstream of the valve body (2).

9. The self-closing valve according to claim 8, It is characterized in that A heat sensing wire (20) is provided in the flow meter (3), and the heat sensing wire (20) and the PCB (10) together constitute a temperature sensing unit.

10. The self-closing valve according to claim 8, It is characterized in that A movable joint (4) is provided upstream of the flow meter (3).

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