Meter shell structure and gas meter

Abstract

The utility model relates to the technical field of gas equipment, and discloses a meter case structure and a gas meter, the meter case structure comprises a meter case main body and a connecting plug-in, the meter case main body is provided with a through hole, the meter case main body extends along the direction far away from the inner cavity of the meter case main body to form a mounting part, the connecting plug-in penetrates through the meter case main body through the through hole, and the connecting plug-in is provided with a first limiting end face; the first limiting end face is in close contact with the inner wall of the meter shell body, the connecting insertion piece is inserted into the installation part, and at least one elastic sealing piece is arranged between the periphery of the connecting insertion piece and the inner circumferential wall of the installation part. According to the utility model, the elastic sealing element is arranged between the outer periphery of the connecting plug-in and the inner peripheral wall of the mounting part, when the connecting plug-in is mounted, the connecting plug-in and the mounting part extrude the elastic sealing element so as to block a gap between the connecting plug-in and the mounting part, and the first limiting end face is tightly attached to the inner wall of the meter shell main body, so that the contact between gas and the elastic sealing element is effectively reduced; corrosion of fuel gas to the elastic sealing piece is reduced, the sealing performance is guaranteed, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas equipment, in particular to a meter case structure and a gas meter. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] The gas meter is a measuring tool used by gas companies to measure gas usage, and also plays a role in regulating pipeline gas pressure. Gas meters with built-in motor valves are widely used due to their compact structure, small size, and no leakage due to external valves. The power supply and action signal of the motor valve require the valve to be connected to an external power supply and PCB board outside the base meter, so the sealing design between the base meter and the valve terminal is crucial.

[0004] In the prior art, the valve line is connected to the male aviation plug, and the male aviation plug is fixed to the base meter housing, and then sealed by applying glue at the connection, or a sealing ring is set at the bottom of the male aviation plug to closely contact the inner wall of the base meter housing to achieve sealing. However, since the service life of the gas meter is limited or the installation environment is relatively harsh, the glue seal is very likely to fail, causing gas leakage; and when the sealing ring is used for sealing, the sealing ring is very likely to be corroded by the gas, causing the sealing protection to fail and causing gas leakage. Utility Model Content

[0005] The purpose of the utility model is to at least solve the problem that when the existing male aviation plug is installed, the seal is easily invalidated by applying glue at the connection, and the sealing ring is easily corroded by the sealing ring provided at the bottom of the male aviation plug and the inner wall of the shell. This purpose is achieved by the following technical solutions:

[0006] The first aspect of the utility model provides a watch case structure, comprising:

[0007] A case body, wherein the case body has a through hole, the case body has a mounting portion extending in a direction away from the inner cavity of the case body, and the through hole passes through the mounting portion;

[0008] A connecting plug-in, wherein the connecting plug-in is arranged through the through hole and passes through the case body, the connecting plug-in has a first limiting end face, the first limiting end face is in close contact with the inner wall of the case body, the connecting plug-in is inserted into the mounting portion, and at least one elastic sealing member is arranged between the outer periphery of the connecting plug-in and the inner peripheral wall of the mounting portion.

[0009] The watch case structure of the utility model is provided with a mounting portion on the watch case body, the connecting plug-in has a first limiting end face, and at least one elastic seal is provided between the outer periphery of the connecting plug-in and the inner peripheral wall of the mounting portion. When the connecting plug-in is inserted into the mounting portion, the connecting plug-in and the mounting portion squeeze the elastic seal to seal the gap between the connecting plug-in and the mounting portion, and the first limiting end face is in close contact with the inner wall of the watch case body, which can effectively reduce the contact between the gas and the elastic seal, reduce the corrosion of the gas to the elastic seal, ensure the sealing performance of the elastic seal, improve the sealing effect, and extend the service life.

[0010] In addition, the watch case structure according to the utility model may also have the following additional technical features:

[0011] In some embodiments of the present invention, the connecting plug-in includes a plug-in body and a connecting base connected to one end of the plug-in body, the plug-in body is inserted into the mounting portion, and a first step structure is arranged between the plug-in body and the connecting base, and the first step structure forms the first limiting end face toward the end face of the case body.

[0012] In some embodiments of the present invention, the plug-in body has a connecting end face arranged toward the inner circumferential wall of the mounting portion, an annular sealing groove is arranged on the connecting end face, the elastic sealing member is arranged in the annular sealing groove, and the plug-in body and the mounting portion squeeze the elastic sealing member to seal the gap between the plug-in body and the mounting portion.

[0013] In some embodiments of the present invention, the number of the elastic seals and the annular sealing grooves is more than two respectively, and the more than two annular sealing grooves are arranged on the connecting plug-in at axial intervals along the connecting plug-in, and the elastic seals are arranged one by one in the annular sealing grooves.

[0014] In some embodiments of the present invention, the connecting plug-in further comprises a circuit board and a plurality of pins, the circuit board being disposed on the connecting base, a plurality of through pin mounting holes being provided on the circuit board, a plurality of the pins being inserted into the plurality of the pin mounting holes in a one-to-one correspondence, and the plurality of the pins all extending along the length direction of the plug-in body.

[0015] In some embodiments of the present invention, the watch case structure also includes a locking piece, the locking piece has a locking portion, and a locking mating portion is formed on the connecting plug-in, and the locking portion cooperates with the locking mating portion to fix the connecting plug-in on the watch case body.

[0016] In some embodiments of the present invention, the locking member has a second limiting end surface, and the end surface of the mounting portion facing away from the case body forms a second mating end surface, and the second mating end surface is used to abut against the second limiting end surface.

[0017] In some embodiments of the present invention, an annular groove is formed on the inner circle of the second limiting end surface, and the axis of the annular groove coincides with the axis of the locking member.

[0018] In some embodiments of the present invention, the locking member includes a locking nut, the inner circumferential surface of the locking nut is provided with a first thread to form the locking portion, the outer surface of the connecting plug is provided with a second thread to form the locking fitting portion, and the locking nut is threadedly connected to the locking fitting portion.

[0019] Another aspect of the present invention provides a gas meter, comprising a valve assembly and a meter case structure as described in any one of the above items, wherein the valve assembly is arranged in the inner cavity of the meter case body and connected to the connecting plug-in. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0021] Figure 1 The structure diagram of the gas meter according to the embodiment of the utility model is schematically shown;

[0022] Figure 2 Schematically shows a partially cutaway schematic diagram of a gas meter according to an embodiment of the present utility model;

[0023] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0024] Figure 4 A partial structural diagram of a gas meter according to an embodiment of the utility model is schematically shown;

[0025] Figure 5 The structure diagram of the connection plug-in of the gas meter according to the embodiment of the utility model is schematically shown;

[0026] Figure 6 The structural diagram of the valve assembly of the gas meter according to the embodiment of the utility model is schematically shown.

[0027] The reference numerals are as follows:

[0028] 1. watch case body; 10. mounting portion; 100. mounting cavity; 11. second mating end surface;

[0029] 2. Connecting plug-in; 20. Plug-in body; 200. Connecting end face; 201. Annular sealing groove; 21. Connecting base; 22. First limiting end face; 23. Locking mating part; 24. Circuit board; 25. Pin;

[0030] 3. Elastic seals;

[0031] 4. Locking member; 40. Locking nut; 400. Second limiting end surface; 401. Annular groove;

[0032] 5. Upper cover;

[0033] 6. Valve assembly; 60. Valve body; 61. Valve line. DETAILED DESCRIPTION

[0034] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0035] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0036] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0037] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0038] The power supply and action signal of the motor valve require the valve to be connected to an external power supply and PCB board outside the base meter, so the sealing design between the base meter and the valve terminal is very important. In the related technology, the valve line is generally connected to the male aviation plug, and the male aviation plug is locked on the base meter shell through a fastening nut, and then glue is applied on the fastening nut to achieve sealing, or a sealing ring is set at the bottom of the male aviation plug to be in close contact with the inner wall of the base meter shell to achieve sealing. However, due to the limited service life of the gas meter and the fact that the installation environment may be very harsh, after years of use, the glue-coated sealing method is very easy to fail, causing gas leakage; and the use of sealing rings for sealing cannot provide very reliable protection for the seal between the base meter and the valve terminal. After the valve is built into the gas meter, the sealing ring is placed inside the gas meter. The sealing ring is in the gas for a long time and is easily corroded by the gas, making the sealing protection ineffective.

[0039] In view of this, the present embodiment provides a watch case structure, which aims to improve the sealing of the installation point by arranging an elastic seal 3 between the outer periphery of the connecting plug-in 2 and the inner circumferential wall of the mounting portion 10, and the connecting plug-in 2 has a first limiting end face 22, and the first limiting end face 22 is in close contact with the inner wall of the watch case body 1, which can effectively reduce the contact between the gas and the elastic seal 3 and reduce the corrosion of the gas to the elastic seal 3, thereby solving the above-mentioned technical problems.

[0040] like Figures 1 to 6 As shown, according to an embodiment of the utility model, a watch case structure is proposed, including a watch case body 1 and a connecting plug-in 2, the watch case body 1 having a through hole, the watch case body 1 extending with a mounting portion 10 in a direction away from the inner cavity of the watch case body 1, the through hole passing through the mounting portion 10, by providing the mounting portion 10, it is ensured that there is sufficient space to install the elastic seal 3 on the side of the connecting plug-in 2, and the stability and reliability of the installation of the connecting plug-in 2 are ensured, and the sealing performance is improved, the connecting plug-in 2 is provided through the through hole passing through the watch case body 1, the connecting plug-in 2 has a first limiting end face 22, the first limiting end face 22 is in close contact with the inner wall of the watch case body 1, the connecting plug-in 2 is inserted in the mounting portion 10, and at least one elastic seal 3 is provided between the outer periphery of the connecting plug-in 2 and the inner peripheral wall of the mounting portion 10.

[0041] The watch case structure of the utility model is provided with a mounting portion 10 on the watch case body 1, the connecting plug-in 2 has a first limiting end face 22, and at least one elastic seal 3 is provided between the outer periphery of the connecting plug-in 2 and the inner peripheral wall of the mounting portion 10. When the connecting plug-in 2 is inserted into the mounting portion 10, the connecting plug-in 2 and the mounting portion 10 squeeze the elastic seal 3 to seal the gap between the connecting plug-in 2 and the mounting portion 10, and the first limiting end face 22 is in close contact with the inner wall of the watch case body 1, which can effectively reduce the contact between the gas and the elastic seal 3, reduce the corrosion of the gas to the elastic seal 3, extend the service life of the elastic seal 3, ensure the sealing performance of the elastic seal 3, and improve the sealing effect.

[0042] In some embodiments of the utility model, the connecting plug-in 2 includes a plug-in body 20 and a connecting base 21 connected to one end of the plug-in body 20, the plug-in body 20 is inserted into the mounting portion 10, and a first step structure is arranged between the plug-in body 20 and the connecting base 21, and the first step structure forms a first limiting end face 22 toward the end face of the case body 1. Specifically, the plug-in body 20 is a cylindrical structure, and the plug-in body 20 is provided with two end faces along the axial direction. One end of the connecting base 21 is connected to one of the end faces of the plug-in body 20. The connecting base 21 and the plug-in body 20 are an integrated structure, which can ensure the overall strength of the connecting plug-in 2. A first step structure is provided between the plug-in body 20 and the connecting base 21. The first step structure extends along the circumference of the plug-in body 20. The end face of the first step structure away from the connecting base 21 forms a first limiting end face 22. The first limiting end face 22 is a plane, and the diameter of the first limiting end face 22 is larger than the diameter of the through hole on the case body 1, so that the first limiting end face 22 is against the inner wall of the case body 1 to limit the connecting plug-in 2. An installation cavity 100 extending along the axial direction of the installation portion 10 is formed in the installation portion 10. When installing the connecting plug-in 2, the plug-in body 20 is inserted into the installation cavity 101 from the inside of the case body 1 to the connecting base 21. The first limiting end face 22 abuts and is in close contact with the inner wall of the case body 1, effectively reducing the contact between the gas and the elastic seal 3 and reducing the corrosion of the elastic seal 3 by the gas.

[0043] In other embodiments, multiple limit blocks may be provided, and the multiple limit blocks are arranged at intervals along the circumference of the plug-in body 20. Each limit block has a limit surface on the side away from the connecting base 21, and the limit surface is used to abut against the inner wall of the case body 1.

[0044] In some embodiments of the utility model, the plug-in body 20 has a connection end face 200 arranged toward the inner peripheral wall of the mounting portion 10, an annular sealing groove 201 is arranged on the connection end face 200, and the elastic seal 3 is arranged in the annular sealing groove 201. The plug-in body 20 and the mounting portion 10 squeeze the elastic seal 3 to block the gap between the plug-in body 20 and the mounting portion 10. Specifically, the portion of the plug-in body 20 inserted into the mounting cavity 100 forms the connection end face 200, and an annular sealing groove 201 is arranged on the outer peripheral surface of the connection end face 200, and the axis of the annular sealing groove 201 coincides with the axis of the plug-in body 20. By setting the annular sealing groove 201, the elastic seal 3 can be limited in the annular sealing groove 201, which is convenient for the installation of the elastic seal 3. The width and depth of the annular sealing groove 201 are slightly smaller than the width and depth of the elastic seal 3, so that the elastic seal 3 can be installed in the annular sealing groove 201 with an interference fit, and the outer periphery of the elastic seal 3 can be slightly protruded from the annular sealing groove 201. Therefore, when installing the connecting end face 200, the connecting end face 200 can be pressed and sealed against the cavity wall of the installation cavity 100 by squeezing the elastic seal 3, thereby improving the stability of the installation and the sealing effect.

[0045] In some embodiments of the utility model, the number of elastic seals 3 and annular sealing grooves 201 is more than two, and the more than two annular sealing grooves 201 are arranged on the connecting plug-in 2 at intervals along the axial direction of the connecting plug-in 2, and the elastic seals 3 are arranged in the annular sealing grooves 201 one by one. In this embodiment, the number of elastic seals 3 and annular sealing grooves 201 is two, and the two annular sealing grooves 201 are arranged on the outer peripheral surface of the plug-in body 20 and are arranged along the axial direction of the plug-in body 20. By arranging multiple elastic seals 3, the reliability of the sealing of the case structure can be increased, the sealing effect can be further improved, and the sealing environment can be prevented from being destroyed after the failure of one elastic seal 3. The normal operation of the gas meter can still be guaranteed by the remaining elastic seals 3, reducing hidden dangers.

[0046] In other embodiments, the number of elastic seals 3 and annular sealing grooves 201 can be set to three or four, etc. according to actual needs, and the setting method can also be that the axis of the annular sealing groove 201 does not coincide with the axis of the plug-in body 20 or the length direction of the annular sealing groove 201 extends along the axis of the connecting plug-in 2, etc.

[0047] In some embodiments of the present invention, the elastic sealing member 3 comprises a sealing ring. The sealing ring is made of rubber or silicone, etc., and is not limited here as long as the sealing ring can be deformed when subjected to force.

[0048] In some embodiments of the present invention, the connection plug-in 2 further includes a circuit board 24 and a plurality of pins 25. The circuit board 24 is disposed on the connection base 21. The circuit board 24 is provided with a plurality of through pin mounting holes. The plurality of pins 25 are correspondingly inserted into the plurality of pin mounting holes, and the plurality of pins 25 extend along the length direction of the plug-in body 20. Specifically, a second step structure is provided between the connection base 21 and the first step structure. The second step structure has a mounting surface. The circuit board 24 is mounted on the step surface. The circuit board 24 is provided with a plurality of spaced pin mounting holes. The plurality of pins 25 are correspondingly inserted into the plurality of pin mounting holes, and each pin 25 is parallel to each other and extends along the length direction of the plug-in body 20.

[0049] In some embodiments of the utility model, the watch case structure further includes a locking member 4, a locking portion is formed on the locking member 4, a locking matching portion is formed on the connecting plug-in, and the locking portion cooperates with the locking matching portion to fix the connecting plug-in on the watch case body. When the locking portion is connected to the locking matching portion, the connecting plug-in and the watch case body are in a locked state, and when the locking portion is separated from the locking matching portion, the connecting plug-in and the watch case body are in an unlocked state, which reduces the difficulty of assembly, improves the efficiency of assembly, and reduces labor costs.

[0050] In some embodiments of the present invention, the locking member 4 has a second limiting end face 400, and the end face of the mounting portion 10 away from the case body 1 forms a second mating end face 11, and the second mating end face 11 is used to abut against the second limiting end face 400 to limit the axial and radial movement of the connecting plug-in 2. Specifically, the locking member 4 includes a locking body, the locking body has a second limiting end face 400, and the end of the mounting portion 10 away from the case body 1 is the second mating end face 11. When installing, the plug-in body 20 of the connecting plug-in 2 extends through the installation cavity 100, the locking member 4 is fixedly connected to the connecting plug-in 2, and the second limiting end face 400 of the installed locking member 4 abuts against the second mating end face 11, so that the axial and radial movement of the connecting plug-in 2 is limited, thereby ensuring the stability and reliability of the installation of the connecting plug-in 2, and further ensuring the sealing at the port of the connecting plug-in 2.

[0051] In some embodiments of the utility model, the locking member 4 includes a locking nut 40, the inner circumferential surface of the locking nut 40 is provided with a first thread to form a locking portion, the outer surface of the connecting plug 2 is provided with a second thread to form a locking mating portion, and the locking nut 40 is threadedly connected to the locking mating portion. Specifically, the first thread cooperates with the second thread, so that the locking nut 40 is installed on the plug-in body 20 in a threaded manner. A second limiting end face 400 is provided on the locking nut 40, and as the locking nut 40 is screwed, the second limiting end face 400 moves toward the direction close to the second mating end face 11 until the second limiting end face 400 is tightly fitted with the second mating end face 11 to tighten the locking nut 40. The threaded connection facilitates the disassembly and assembly of the locking member, improves the disassembly and assembly efficiency, and the second limiting end face 400 and the second mating end face 11 are tightly pressed against each other to prevent gas from overflowing from the connection, further improving the sealing performance.

[0052] In other embodiments, the locking member 4 can also be arranged on the connecting plug-in 2, for example, a plurality of elastic claw structures are arranged on the outer peripheral surface of the plug-in body 20, and the elastic claw structure includes a plurality of elastic claws and a receiving groove, one end of the elastic claw is hingedly fixed to the outer wall of the plug-in body 20, and the other end can be extended or received in the receiving groove, and a plurality of locking grooves adapted to the elastic claw are arranged on the end surface of the mounting portion 10 away from the case body 1. When the connecting plug-in 2 is installed, the elastic claw is received in the receiving groove, and the connecting plug-in is inserted into the mounting portion 10 from the inside of the case body 1, so that the first limiting end face 22 abuts against the inner wall of the case body 1, and the elastic claw extends from the receiving groove under the elastic action, and is placed in the locking groove and tightly fixed, thereby realizing the function of locking and limiting the connecting plug-in 2.

[0053] In other embodiments, the locking member 4 may also be a retaining spring or a mounting sleeve, which is disposed outside the plug-in body 20 and is provided with a latch or a block to fix the position, thereby achieving the purpose of locking the connected plug-in 2.

[0054] In some embodiments of the present invention, the inner circle of the second limiting end face 400 is provided with an annular groove 401, and the axis of the annular groove 401 coincides with the axis of the locking nut 40. By providing the annular groove 401, the contact area between the second limiting end face 400 and the second mating end face 11 can be reduced.

[0055] The second aspect of the utility model provides a gas meter, including a valve assembly and the above-mentioned meter case structure, wherein the valve assembly is arranged in the inner cavity of the meter case body and connected to the connecting plug-in. Specifically, the gas meter also includes an upper cover 5, which is detachably arranged on the top of the meter case body by bolts, the connecting plug-in 2 is an aviation plug male head, and the valve assembly 6 includes a valve body 60 and a valve line 61, one end of the valve line 61 is welded to the valve body 60, and the other end of the valve line 61 is welded to the circuit board.

[0056] When installing the gas meter of the present invention, first install the two sealing rings into the annular sealing groove 201 respectively, and then insert the male aviation plug from the inside of the meter case body 1 through the plug-in body 20 to the connecting base 21 into the installation cavity 100. At this time, the first limiting end face 22 abuts against the inner wall of the meter case body 1, and then screw the locking nut 40 into the plug-in body 20. As the locking nut 40 is screwed, the second limiting end face 400 moves toward the direction close to the second mating end face 11 until the second limiting end face 400 is tightly fitted with the second mating end face 11, so as to tighten the locking nut 40 and complete the sealing at the male aviation plug. The gas meter of the utility model is provided with a sealing structure, and the connecting plug-in 2 is arranged in the mounting portion 10 through the mounting cavity 100. The elastic sealing member 3 makes the connecting end face 200 in close contact with the cavity wall of the mounting cavity 100 to seal the gap between the connecting plug-in 2 and the mounting cavity 100, which can effectively reduce the contact between the gas and the elastic sealing member 3, reduce the corrosion of the gas to the elastic sealing member 3, extend the service life of the elastic sealing member 3, ensure the sealing performance of the elastic sealing member 3, and improve the sealing effect.

[0057] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A watch case structure, characterized in that: include: A case body, wherein the case body has a through hole, the case body has a mounting portion extending in a direction away from the inner cavity of the case body, and the through hole penetrates the mounting portion; A connecting plug-in, wherein the connecting plug-in is arranged through the through hole and passes through the case body, the connecting plug-in has a first limiting end face, the first limiting end face is in close contact with the inner wall of the case body, the connecting plug-in is inserted into the mounting portion, and at least one elastic sealing member is arranged between the outer periphery of the connecting plug-in and the inner peripheral wall of the mounting portion.

2. The watch case structure according to claim 1, characterized in that: The connecting plug-in includes a plug-in body and a connecting base connected to one end of the plug-in body, the plug-in body is inserted into the mounting portion, a first step structure is provided between the plug-in body and the connecting base, and the first step structure forms the first limiting end face toward the end face of the case body.

3. The watch case structure according to claim 2, characterized in that: The plug-in body has a connecting end face arranged toward the inner circumferential wall of the mounting portion, an annular sealing groove is arranged on the connecting end face, the elastic sealing member is arranged in the annular sealing groove, the plug-in body and the mounting portion squeeze the elastic sealing member to seal the gap between the plug-in body and the mounting portion.

4. The watch case structure according to claim 3, characterized in that: The number of the elastic seals and the annular sealing grooves is more than two respectively, and the more than two annular sealing grooves are arranged on the connecting plug-in at intervals along the axial direction of the connecting plug-in, and the elastic seals are arranged in the annular sealing grooves one by one.

5. The watch case structure according to claim 2, characterized in that: The connecting plug-in further comprises a circuit board and a plurality of pins, wherein the circuit board is arranged on the connecting base, and a plurality of through pin mounting holes are arranged on the circuit board, and the plurality of pins are inserted into the plurality of pin mounting holes in a one-to-one correspondence, and the plurality of pins all extend along the length direction of the plug-in body.

6. The watch case structure according to any one of claims 1 to 5, characterized in that: The watch case structure also includes a locking piece, which has a locking portion. A locking matching portion is formed on the connecting plug-in, and the locking portion matches the locking matching portion to fix the connecting plug-in on the watch case body.

7. The watch case structure according to claim 6, characterized in that: The locking member has a second limiting end surface, and the end surface of the mounting portion facing away from the watch case body forms a second matching end surface, and the second matching end surface is used to abut against the second limiting end surface.

8. The watch case structure according to claim 7, characterized in that: An annular groove is formed on the inner circle of the second limiting end surface, and the axis of the annular groove coincides with the axis of the locking member.

9. The watch case structure according to claim 7, characterized in that: The locking member comprises a locking nut, the inner circumferential surface of the locking nut is provided with a first thread to form the locking portion, the outer surface of the connecting plug is provided with a second thread to form the locking fitting portion, and the locking nut is threadedly connected to the locking fitting portion.

10. A gas meter, characterized in that: It comprises a valve component and a watch case structure as claimed in any one of claims 1 to 9, wherein the valve component is arranged in the inner cavity of the watch case body and connected to the connecting plug-in.

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