CN216555536U - Self-closing valve - Google Patents

Abstract

The utility model relates to the technical field of gas pipeline valves, in particular to a self-closing valve. The self-closing valve provided by the embodiment of the disclosure comprises a valve body, a transmission shaft assembled in the valve body in a sliding manner, a sheath sleeved outside the transmission shaft and fixedly connected with the transmission shaft, a toggle switch, a circuit board and a connecting block. One of a limiting column and a limiting groove is arranged on the connecting block, the other of the limiting column and the limiting groove is arranged on the valve body, and the limiting column is inserted into the limiting groove. The connecting block is also provided with a fastening hole, the valve body is provided with a stud, and the threaded fastener penetrates through the fastening hole to be fixed with the stud in a threaded connection mode. The self-closing valve disclosed not only ensures the connection stability of the detection device and the valve body, but also has the advantages of simple structure and high assembly efficiency by the mode of fixedly combining the limiting column, the limiting groove and the screw joint.

Description

Self-closing valve

Technical Field

The utility model relates to the technical field of gas pipeline valves, in particular to a self-closing valve.

Background

In order to ensure the safety of gas supply, a natural gas company installs a self-closing valve at the joint of the tail end of a pipeline and a rubber pipe behind a gas meter, so that the gas supply of a user is automatically cut off when the gas pipeline is under-pressure or over-pressure.

In order to ensure that a natural gas company remotely masters whether a gas pipeline is in an overpressure state or an under-pressure state, the inventor develops a self-closing valve integrated with a detection device, the working state of the self-closing valve can be detected through the detection device, and then whether the gas pipeline is in a normal pressure state, an overpressure state or an under-pressure state is judged.

The detection device comprises a circuit board, a base plate, a connecting block and a toggle switch for detecting the running position of the transmission shaft, wherein the circuit board and the toggle switch are arranged on the surface of the base plate side by side at intervals, and the connecting block is approximately arranged between the circuit board and the toggle switch and used for installing the detection device on a valve body of the self-closing valve. The connecting end of the toggle switch is electrically connected with the circuit board, the free end of the toggle switch penetrates through the through hole on the side wall of the valve body and then is inserted into the matching hole of the sheath, and the sheath is sleeved outside the transmission shaft of the self-closing valve and is fixedly connected with the transmission shaft. When the pressure in the gas pipeline is in a normal pressure state, the transmission shaft and the sheath cannot move upwards or downwards, the toggle switch cannot be triggered, the circuit board sends a signal that the gas pipeline is in the normal pressure state at the moment, certainly, the circuit board does not send the signal, and the condition that the signal is not received is defined as the normal pressure state; when the gas pressure in the gas pipeline is too high, the transmission shaft and the sheath move upwards so as to drive the toggle switch to simultaneously move upwards, and the toggle switch sends out a first signal to indicate that the gas pipeline is in an overpressure state; when gas pressure in the gas pipeline is low excessively, transmission shaft and sheath will move down to drive toggle switch and move down simultaneously, toggle switch will send the second signal, be in under-voltage state with the instruction gas pipeline.

However, the above-mentioned detecting device requires a large number of screws to fix the connecting block to the valve body, which results in a complicated and inefficient assembly process.

SUMMERY OF THE UTILITY MODEL

The present invention provides a self-closing valve that solves the above and other potential technical problems.

The utility model provides a self-closing valve which comprises a valve body, a transmission shaft, a sheath, a toggle switch, a circuit board and a connecting block, wherein the transmission shaft is assembled in the valve body in a sliding manner, the sheath is sleeved outside the transmission shaft and is fixedly connected with the transmission shaft. The connecting end of the toggle switch and the circuit board are both installed on the connecting block, the toggle switch is electrically connected with the circuit board, and the free end of the toggle switch penetrates through the through hole in the side wall of the valve body and extends into the matching hole in which the sheath is arranged. One of a limiting column and a limiting groove is arranged on the connecting block, the other of the limiting column and the limiting groove is arranged on the valve body, and the limiting column is inserted into the limiting groove. The connecting block is also provided with a fastening hole, the valve body is provided with a stud, and the threaded fastener penetrates through the fastening hole to be fixed with the stud in a threaded manner.

In an alternative embodiment, the spacing column comprises a connecting part and a spacing part; one end of the connecting part is connected with the connecting block or the valve body, the other end of the connecting part is connected with the limiting part, and the limiting groove is matched with the limiting part in shape. It should be noted that, the limiting column is arranged to include two parts, namely a connecting part and a limiting part, and the limiting groove is matched with the limiting part in shape, so that the limiting part can be completely installed in the limiting groove in the connecting process, and the stability of the positioning structure is further ensured.

In an alternative embodiment, the limiting part comprises a top wall, a bottom wall and at least two side walls which are connected end to end, wherein at least one side wall is a plane. It should be noted that, in this embodiment, set up spacing portion to the lateral wall including roof, diapire and two at least end to end connections, set up at least one of them lateral wall to the plane, can guarantee to connect the in-process and avoid connecting portion to rotate, and then guarantee the stability of connecting.

In an optional embodiment, the limiting portion includes a first side wall, a second side wall, a third side wall, a fourth side wall, a fifth side wall and a sixth side wall that are connected end to end, the first side wall and the fourth side wall are parallel and spaced apart, the second side wall and the sixth side wall are parallel and spaced apart, the first side wall, the second side wall, the fourth side wall and the sixth side wall are planes, and the third side wall and the fifth side wall are arc surfaces. It should be noted that, the first side wall, the second side wall, the fourth side wall and the sixth side wall are all set to be planes, so that the limiting is realized better, and the rotation in the connection process is prevented. The third side wall and the fifth side wall are arranged to be cambered surfaces, so that the limiting part can be smoothly installed into the limiting groove.

In an optional embodiment, the limiting groove is arranged on the valve body, and the limiting column is arranged on the connecting block; the top end of the stud is provided with a threaded hole in threaded connection with the threaded fastener; the connecting block is also provided with a shaft sleeve sleeved on the stud, the inner side wall of the shaft sleeve defines a fastening hole, and the inner side wall of the shaft sleeve is provided with a flange; after the connecting block and the stud are assembled, the head of the threaded fastener is abutted to the flange. Through the inside wall at the axle sleeve sets up the flange, the threaded fastener accessible supports tight flange in order to fix axle sleeve and double-screw bolt spiro union to the head of threaded fastener is located inside the axle sleeve, also can avoid it to take place to interfere with other parts, leads to this threaded fastener to become flexible.

In an alternative embodiment, the inner side wall of the shaft sleeve is also provided with a reinforcing rib. It should be noted that, the inner side wall of the shaft sleeve is provided with the reinforcing rib, so that the structural stability of the shaft sleeve can be ensured.

In an optional embodiment, a semi-closed annular limiting boss is arranged at the bottom end of the shaft sleeve, and the annular limiting boss is arranged around a central hole of the shaft sleeve; the top end of the stud is abutted to the bottom end of the shaft sleeve, and the inner diameter of the annular limiting boss is matched with the diameter of the stud. The semi-closed annular limiting boss is arranged, so that the stud can slide from the opening part on the side surface to be matched with the central hole of the shaft sleeve; the inner diameter of the annular limiting boss is matched with the diameter of the stud, so that the outer side wall of the stud is limited through the annular limiting boss after the stud slides to correspond to the central hole of the shaft sleeve from the side opening part, the stud is prevented from deviating, the stud is ensured to correspond to the central hole of the shaft sleeve, and the threaded fastener is convenient to install.

In an alternative embodiment, the opening of the annular limiting boss is a gradually-enlarged opening which is gradually enlarged outwards. It should be noted that, the gradually opening of the annular limiting boss is gradually enlarged outwards, so that the stud can smoothly slide to the position corresponding to the central hole of the shaft sleeve from the opening, and the assembly process is simpler and easier to operate.

In an alternative embodiment, the limiting groove is arranged on the top wall of the valve body, and the stud is arranged on the side wall of the valve body and extends in the vertical direction; or the limiting groove and the stud are both arranged on the side wall of the valve body, and the stud extends in the horizontal direction. It should be noted that the limiting groove is arranged on the top wall of the valve body, and the top wall of the valve body is a horizontal plane, so that the limiting column can be stably supported; the stud is arranged on the side wall of the valve body and extends along the vertical direction, the mounting directions of the stud and the limiting column are the same, one-time positioning assembly is conveniently realized in the assembly process, and therefore the assembly efficiency is improved.

In an alternative embodiment, the device further comprises a substrate; the toggle switch and the circuit board are arranged on the substrate at intervals; the base plate is fixed with the connecting block in a threaded connection mode, the base plate is further provided with a positioning hole, and the connecting block is correspondingly provided with a positioning column matched with the positioning hole. It needs to explain, set up the base plate and be used for accepting circuit board and toggle switch, the base plate passes through the spiro union with the connecting block simultaneously and fixes and reference column location, both guaranteed the stability of connecting, has connection structure simple simultaneously for the assembly process is easy to operate, improves assembly efficiency.

The self-closing valve provided by the embodiment of the disclosure comprises a valve body, a transmission shaft assembled in the valve body in a sliding manner, a sheath sleeved outside the transmission shaft and fixedly connected with the transmission shaft, a toggle switch, a circuit board and a connecting block. The connecting end of the toggle switch and the circuit board are both installed on the connecting block, the toggle switch is electrically connected with the circuit board, and the free end of the toggle switch penetrates through the through hole in the side wall of the valve body and extends into the matching hole in which the sheath is arranged. One of a limiting column and a limiting groove is arranged on the connecting block, the other of the limiting column and the limiting groove is arranged on the valve body, and the limiting column is inserted into the limiting groove. The connecting block is also provided with a fastening hole, the valve body is provided with a stud, and the threaded fastener penetrates through the fastening hole to be fixed with the stud in a threaded manner. Adopt spacing post and spacing groove to be connected, with the fixed combination of spiro union, not only firm in connection, simple structure moreover, the packaging efficiency is high.

Advantages of additional aspects of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and other objects, features and advantages of the embodiments of the present invention will become more readily understood by the following detailed description with reference to the accompanying drawings. Embodiments of the utility model will now be described, by way of example and not limitation, in the accompanying drawings, in which:

FIG. 1 is a schematic diagram of the overall structure of a self-closing valve provided by the embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of a self-closing valve provided in accordance with an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a valve body of the self-closing valve provided by the embodiment of the application;

FIG. 4 is a schematic structural diagram of a connecting block of the self-closing valve provided by the embodiment of the disclosure in a first view angle;

FIG. 5 is a schematic structural diagram of a connecting block of the self-closing valve provided by the embodiment of the disclosure in a second view angle;

FIG. 6 is a schematic structural diagram of the connection block and the base plate of the self-closing valve provided by the embodiment of the disclosure.

Reference numerals:

11-a valve body;

114-a limiting groove; 115-a stud;

1151-a threaded bore;

12-a drive shaft;

121-a sheath; 123-mating holes;

13-toggle switch;

14-a circuit board;

15-connecting blocks;

151-limiting column; 152-a connecting portion;

153-a limiting part; 1531 — a first sidewall;

1532 — a second sidewall; 1533-a third sidewall;

1534-a fourth sidewall; 1535-fifth side wall;

1536-sixth sidewall; 155-shaft sleeve;

156-fastening holes; 1551-reinforcing ribs;

1553-annular limiting boss; 1555-gradual opening;

157-positioning columns; 158-flange;

159-threaded through hole;

16-substrate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be a mechanical connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

In order to ensure the safety of gas supply, a natural gas company installs a self-closing valve at the joint of the tail end of a pipeline and a rubber pipe behind a gas meter, so that the gas supply of a user is automatically cut off when the gas pipeline is under-pressure or over-pressure.

In order to ensure that a natural gas company can remotely master whether the gas pipeline is in an overpressure state or an under-pressure state, a detection device can be integrated on the self-closing valve, the working state of the self-closing valve is detected through the detection device, and then whether the gas pipeline is in a normal pressure state, an overpressure state or an under-pressure state is judged. However, the detecting device needs to use a large number of screws to connect with the valve body, which results in a very complicated and inefficient assembly process.

In view of this, the self-closing valve provided by the embodiment of the disclosure realizes that the connecting block is connected with the valve body in a mode of combining the positioning structure and the threaded connecting piece, so that the connection stability is ensured, and meanwhile, the self-closing valve is simple in structure and high in assembly efficiency.

Specifically, the self-closing valve provided by the embodiment of the disclosure comprises a valve body, a transmission shaft slidably assembled in the valve body, a sheath sleeved outside the transmission shaft and fixedly connected with the transmission shaft, a toggle switch, a circuit board and a connecting block. The connecting end of the toggle switch and the circuit board are both installed on the connecting block, the toggle switch is electrically connected with the circuit board, and the free end of the toggle switch penetrates through the through hole in the side wall of the valve body and extends into the matching hole in which the sheath is arranged. One of a limiting column and a limiting groove is arranged on the connecting block, the other of the limiting column and the limiting groove is arranged on the valve body, and the limiting column is inserted into the limiting groove. The connecting block is also provided with a fastening hole, the valve body is provided with a stud, and the threaded fastener penetrates through the fastening hole to be fixed with the stud in a threaded manner. The self-closing valve disclosed by the application not only ensures the connection stability, but also has a simple structure and high assembly efficiency.

Fig. 1 is a schematic overall structural diagram of a self-closing valve provided by an embodiment of the disclosure, and fig. 2 is a schematic sectional structural diagram of the self-closing valve provided by the embodiment of the disclosure. Referring to fig. 1 and 2, the self-closing valve includes a valve body 11, a transmission shaft 12 slidably mounted in the valve body 11, a sheath 121 sleeved outside the transmission shaft 12 and tightly connected with the transmission shaft 12, a toggle switch 13, a circuit board 14, and a connection block 15. The connecting end of the toggle switch 13 and the circuit board 14 are both mounted on the connecting block 15, the toggle switch 13 is electrically connected with the circuit board 14, and the free end of the toggle switch 13 penetrates through the through hole on the side wall of the valve body 11 and extends into the matching hole 123 of the sheath 121. One of the limiting column 151 and the limiting groove 114 is arranged on the connecting block 15, the other one of the limiting column 151 and the limiting groove 114 is arranged on the valve body 11, and the limiting column 151 is inserted into the limiting groove 114. The connecting block 15 is further provided with a fastening hole 156, the valve body 11 is provided with a stud 115, and a threaded fastener penetrates through the fastening hole 156 to be fixed with the stud 115 in a threaded manner.

Illustratively, the valve body 11 includes a top wall, a bottom wall, and side walls, wherein the top wall, the bottom wall, and the side walls collectively enclose a valve cavity that constitutes the valve body 11. The transmission shaft 12 is slidably fitted in the valve chamber of the valve body 11 through a mounting hole provided in the top wall, and the transmission shaft 12 is liftable along the axis of the mounting hole in the valve chamber.

The transmission shaft 12 is cylindrical, a sheath 121 is sleeved on the outer side wall of the transmission shaft 12, the sheath 121 is fixedly connected with the transmission shaft 12 and synchronously ascends and descends along with the transmission shaft 12, and a matching hole 123 for inserting the free end of the toggle switch 13 is formed in the sheath 121. In some examples, the mating aperture 123 is substantially trapezoidal in cross-section. Of course, in other examples, the mating aperture 123 may be other shapes.

The toggle switch 13 may be a structure having at least one toothed member, which may be a gear, for example. The connecting end of the toggle switch 13 and the circuit board 14 are both mounted on the connecting block 15, the toggle switch 13 is electrically connected with the circuit board 14, and the free end of the toggle switch 13 penetrates through the through hole on the side wall of the valve body 11 and extends into the matching hole 123 of the sheath 121. Specifically, at least one tooth of the gear extends into the mating hole 123, such that the sheath 121, when raised and lowered, can toggle the gear to rotate clockwise or counterclockwise. Of course, in other examples, the toggle switch 13 of the column structure may be adopted, and the flexible connection end of the column structure is toggled up and down through the sheath, so as to trigger the electrical contact type switch arranged in the up-and-down direction on the connection block 15, so as to provide different signals to indicate the pressure of the gas pipeline.

In the use process, when the pressure in the gas pipeline is in a normal pressure state, the transmission shaft 12 and the sheath 121 cannot move upwards or downwards, the toggle switch 13 cannot be triggered, and the circuit board 14 sends a signal that the gas pipeline is in the normal pressure state; of course, it is also possible to not send a signal and define that no signal is received as a normal pressure state. When the gas pressure in the gas pipeline is too high, the transmission shaft 12 and the sheath 121 move upwards, so that the toggle switch 13 is driven to move upwards at the same time, and the toggle switch 13 sends out a first signal to indicate that the gas pipeline is in an overpressure state; when gas pressure in the gas pipeline is too low, the transmission shaft 12 and the sheath 121 move downwards, so that the toggle switch 13 is driven to move downwards at the same time, and the toggle switch 13 sends a second signal to indicate that the gas pipeline is in an under-voltage state.

FIG. 3 is a schematic structural diagram of a valve body of the self-closing valve provided by the embodiment of the application. Referring to fig. 3, a limit groove 114 and a vertical stud 115 are respectively disposed on the top wall and the side wall of the valve body, correspondingly, a limit post 151 engaged with the limit groove 114 is disposed on the bottom surface of the connecting block 15, a shaft sleeve 155 engaged with the stud 115 is disposed on the side surface of the connecting block 15, and a fastening hole 156 engaged with the stud 115 is defined by the inner wall of the shaft sleeve 155. During assembly, the limiting column 151 of the connecting block is inserted into the limiting groove 114, the stud 115 is inserted into the fastening hole 156 defined by the inner side wall of the shaft sleeve 155, and then the shaft sleeve 155 and the stud 115 are fastened and connected together by using a threaded fastener, so that the assembly of the detection device and the valve body can be realized, and the assembly is very convenient. In addition, because the installation direction of the stud 115 and the limiting column 151 is the same direction, the butt joint can be better realized in the assembly process, the operation process is simpler, and the assembly efficiency is improved.

In other examples, the limiting groove 114 and the stud 115 may be disposed on the sidewall of the valve body, but the stud 115 is horizontally disposed, and accordingly, a fastening hole 156 horizontally penetrating the connecting block may be disposed to fasten the connecting block to the valve body 11 by a screw fastener. It should be understood that when the stopper groove 114 is provided on the side wall of the valve body 11, the stopper post 151 provided on the connection block 15 is also horizontally arranged.

It should be noted that, in other examples, the limiting groove 114 may be disposed on the connecting block 115, and correspondingly, the limiting column 151 is disposed on the valve body 11. For the sake of convenience of description, the following description will be made by taking the example in which the limiting column 151 is disposed on the connecting block 15 and the limiting groove 114 is disposed on the top wall of the valve body 11, and the alternative structures of the limiting column 151 and the limiting groove 114 are schematically illustrated so that those skilled in the art can more clearly understand the technical solution of the present disclosure.

FIG. 4 is a schematic structural diagram of a connecting block of a self-closing valve provided by the embodiment of the disclosure in a first view angle, and FIG. 5 is a schematic structural diagram of a connecting block of a self-closing valve provided by the embodiment of the disclosure in a second view angle. As shown in fig. 4 and 5, the stopper column 151 includes a connecting portion 152 and a stopper portion 153; one end of the connecting part 152 is connected with the connecting block 15 or the valve body 11, the other end of the connecting part 152 is connected with the limiting part 153, and the limiting groove 114 is matched with the limiting part 153 in shape. It should be noted that, the limiting column 151 is configured to include two parts, namely, the connecting part 152 and the limiting part 153, and the shapes of the limiting groove 114 and the limiting part 153 are matched, so that in the connecting process, the limiting part 153 can be completely installed in the limiting groove 114, and the stability of the limiting structure is further ensured.

Illustratively, the stopper 153 includes a top wall, a bottom wall, and at least two end-to-end side walls, at least one of which is planar. It should be noted that, in this embodiment, the limiting portion 153 is configured to include a top wall, a bottom wall, and at least two end-to-end connected side walls, and at least one of the side walls is a plane, so that the rotation of the connecting portion 152 can be avoided in the connection process, and the connection stability can be further ensured. Specifically, during the assembly process, the top wall of the limiting portion 153 abuts against the bottom wall of the limiting groove 114, and the bottom wall of the limiting portion 153 is connected to the connecting portion 152. Illustratively, the stopper 153 has a polygonal plate-like structure as a whole.

With reference to fig. 4, the position-limiting portion 153 includes a first sidewall 1531, a second sidewall 1532, a third sidewall 1533, a fourth sidewall 1534, a fifth sidewall 1535, and a sixth sidewall 1536 connected end to end, the first sidewall 1531 and the fourth sidewall 1534 are parallel and spaced apart, the second sidewall 1532 and the sixth sidewall 1536 are parallel and spaced apart, the first sidewall 1531, the second sidewall 1532, the fourth sidewall 1534, and the sixth sidewall 1536 are flat, and the third sidewall 1533 and the fifth sidewall 1535 are curved. It should be noted that, the first side wall 1531, the second side wall 1532, the fourth side wall 1534, and the sixth side wall 1536 are configured to be flat, which facilitates better limiting and prevents rotation during connection. The third side wall 1533 and the fifth side wall 1535 are formed as arc surfaces, so that the position-limiting portion 153 can be smoothly installed in the position-limiting groove 114. Illustratively, the shape of the inner sidewall of the retaining groove 114 is adapted to the shape of the outer sidewall of the retaining portion 153.

Alternative configurations of the bushing 155 and stud 115 are further described below to enable those skilled in the art to more clearly understand the inventive concepts of the present disclosure.

With continued reference to FIG. 5, the sleeve 155 is hollow and cylindrical, and has a flange 158 formed on an inner wall thereof; after the connection block 15 and the stud 115 are assembled, the head of the threaded fastener abuts against the flange 158, thereby fastening the connection block 15 and the stud 115 together. Because the head of the threaded fastener is located within the sleeve 155, it is possible to avoid interference with other components, reducing the risk of it coming loose and falling off. Illustratively, the top end of the stud 115 is provided with a threaded bore 1151 for threaded connection with a threaded fastener.

The inner side wall of the shaft sleeve 155 is also provided with a reinforcing rib 1551 to improve the strength of the shaft sleeve 155. Specifically, the reinforcing ribs 1551 include four reinforcing blocks disposed at equal intervals, and the reinforcing blocks are disposed at the inner side wall of the sleeve 155 along the axial direction of the sleeve 155 so as to improve the uniformity of the strength of the sleeve 155.

Illustratively, a semi-closed annular limiting boss 1553 is arranged at the bottom end of the shaft sleeve 155, and the annular limiting boss 1553 is arranged around the central hole of the shaft sleeve 155; the top end of the stud 115 abuts against the bottom end of the sleeve 155, and the inner diameter of the annular limiting boss 1553 is matched with the diameter of the stud 115. It should be noted that the semi-closed annular limiting boss 1553 is arranged to facilitate the sliding of the stud 115 from the side opening to the central hole of the shaft sleeve 155, the inner diameter of the annular limiting boss 1553 is adapted to the outer diameter of the stud 115, so that when the stud 115 is installed in place, the outer side wall of the stud 115 is limited by the annular limiting boss 1553 to avoid the offset of the stud 115, and meanwhile, the stud 115 is further ensured to correspond to the central hole of the shaft sleeve 155 to facilitate the installation of the threaded fastener.

Illustratively, the opening of the annular stop boss 1553 is a gradually opening 1555 that gradually enlarges outward. It should be noted that the opening of the annular limiting boss 1553 is a gradually-enlarged opening 1555 which is gradually enlarged outwards, so that the stud 115 can conveniently enter the annular limiting boss 1553, and the assembly process is more labor-saving.

Illustratively, the stud 115 is cylindrical in shape with internal threads formed on the inner sidewall.

FIG. 6 is a schematic structural diagram of the connection block and the base plate of the self-closing valve provided by the embodiment of the disclosure. Referring to fig. 6, the detecting device may further include a substrate 16. The toggle switch 13 and the circuit board 14 are arranged on the substrate 16 at intervals; the base plate 16 is fixed with the connecting block 15 in a threaded manner, the base plate 16 is further provided with a positioning hole, and the connecting block 15 is correspondingly provided with a positioning column 157 matched with the positioning hole. It should be noted that, the base plate 16 is arranged to receive the circuit board 14 and the toggle switch 13, and meanwhile, the base plate 16 and the connecting block 15 are fixed by screwing and positioned by the positioning column 157, so that the connection stability can be ensured, and meanwhile, the connecting structure has the advantages of simple structure, easy operation in the assembling process, high assembling efficiency and the like.

Illustratively, the base plate 16 and the connecting block 15 are screwed by screws, and correspondingly, threaded through holes 159 for matching with the screws are formed on the connecting block 15.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the utility model. The utility model is not described in detail in order to avoid unnecessary repetition.

Claims (10)

1. A self-closing valve is characterized by comprising a valve body, a transmission shaft, a sheath, a toggle switch, a circuit board and a connecting block, wherein the transmission shaft is slidably assembled in the valve body;

the connecting end of the toggle switch and the circuit board are both arranged on the connecting block, the toggle switch is electrically connected with the circuit board, and the free end of the toggle switch penetrates through the through hole in the side wall of the valve body and extends into the matching hole in the sheath;

one of a limiting column and a limiting groove is arranged on the connecting block, the other of the limiting column and the limiting groove is arranged on the valve body, and the limiting column is inserted into the limiting groove;

the connecting block is further provided with a fastening hole, the valve body is provided with a stud, and a threaded fastener penetrates through the fastening hole to be fixed with the stud in a threaded connection mode.

2. The self-closing valve of claim 1, wherein the restraint post comprises a connecting portion and a restraint portion;

one end of the connecting part is connected with the connecting block or the valve body, the other end of the connecting part is connected with the limiting part, and the limiting groove is matched with the limiting part in shape.

3. A self-closing valve according to claim 2 wherein the retainer comprises a top wall, a bottom wall and at least two side walls connected end to end, at least one of which is planar.

4. The self-closing valve according to claim 3, wherein the position-limiting portion comprises a first side wall, a second side wall, a third side wall, a fourth side wall, a fifth side wall and a sixth side wall which are connected end to end, the first side wall and the fourth side wall are parallel and spaced apart, the second side wall and the sixth side wall are parallel and spaced apart, the first side wall, the second side wall, the fourth side wall and the sixth side wall are flat, and the third side wall and the fifth side wall are cambered surfaces.

5. Self-closing valve according to any of claims 1 to 4, wherein the limiting groove is provided on the valve body and the limiting post is provided on the connecting block;

the top end of the stud is provided with a threaded hole in threaded connection with the threaded fastener;

the connecting block is also provided with a shaft sleeve sleeved on the stud, the fastening hole is limited by the inner side wall of the shaft sleeve, and the inner side wall of the shaft sleeve is provided with a flange; after the connecting block and the stud are assembled, the head of the threaded fastener is abutted to the flange.

6. A self-closing valve according to claim 5, wherein the inner side wall of the sleeve is further provided with a stiffener.

7. The self-closing valve according to claim 5, wherein the bottom end of the sleeve is provided with a semi-closed annular limiting boss which is arranged around the central hole of the sleeve; the top end of the stud is abutted to the bottom end of the shaft sleeve, and the inner diameter of the annular limiting boss is matched with the diameter of the stud.

8. The self-closing valve according to claim 7, wherein the opening of the annular stop boss is a gradually opening which is gradually enlarged outwards.

9. Self-closing valve according to claim 5, wherein the limiting groove is provided on the top wall of the valve body and the stud is provided on the side wall of the valve body and extends in a vertical direction; alternatively, the first and second electrodes may be,

the limiting groove and the stud are both arranged on the side wall of the valve body, and the stud extends in the horizontal direction.

10. The self-closing valve according to any of the claims 1 to 4, further comprising a base plate, wherein the toggle switch is arranged on the base plate at a distance from the circuit board;

the base plate is fixed with the connecting block in a threaded connection mode, the base plate is further provided with a positioning hole, and the connecting block is correspondingly provided with a positioning column matched with the positioning hole.

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