Automatic control valve in full-sealed screw drive gas meter

Abstract

The utility model discloses an automatic control valve in a full-sealed spiral transmission gas meter, which comprises a shell, a transmission assembly and a sealing assembly, the sealing assembly comprises a first sealing structure, a second sealing structure and a third sealing structure, the first sealing structure is a convex structure arranged on the end face of the upper end of a nut sleeve, and the second sealing structure is a convex structure arranged on the end face of the lower end of the nut sleeve. The first sealing structure is located between the upper end face of the nut sleeve and the inner surface of the pressing cover, the second sealing structure is arranged between the upper end face of the edge of the nut sleeve and the lower end face of the edge of the pressing cover, and a circle of the upper end face of the edge of the second sealing structure is provided with a curled edge bent towards the inner side. The upper end face of the turned edge abuts against the step face, the third sealing structure is a protruding structure arranged on the lower end face of a circle of the edge of the pressing cover, and the third sealing structure is located between the lower end face of the edge of the pressing cover and the second sealing structure. The utility model has the advantages of good gas path on-off control effect, compact structure, convenience in installation and good airtight effect.

Description

Technical Field

[0001] The utility model relates to the technical field of gas meters, in particular to an automatic control valve in a fully sealed spiral transmission gas meter. Background Art

[0002] Traditional gas meters only have a gas usage metering device inside, and no automatic control valve inside the meter. When it is necessary to control the gas meter of an on-site user, the gas circuit cannot be cut off in time. In the existing technology, some manufacturers use a motor valve at the air inlet of the gas meter as an actuator to control the opening and closing of the gas meter. The gas meter has high requirements for air tightness, but these motor valves still have insufficient air tightness and cannot meet the high air tightness requirements in the gas meter. The defects in their air tightness are mainly reflected in the connection between the motor valve and the air inlet of the gas meter. The air tightness between the pressure cover and the nut sleeve is poor, resulting in unstable control effect of the motor valve on the gas circuit cut-off of the gas meter, and insufficient air tightness or even failure after a period of use. In addition, in the existing technology, the pressure cover and the nut sleeve are easy to fall off, which will also cause the motor valve to fail in air tightness.

[0003] Therefore, the applicant has developed a fully sealed spiral transmission gas meter automatic control valve to solve the above problems. Utility Model Content

[0004] The utility model provides a fully sealed spiral transmission gas meter internal automatic control valve to solve the technical problem of low airtightness at the connection between the motor valve and the gas inlet of the gas meter.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A fully sealed spiral transmission gas meter internal automatic control valve, comprising:

[0007] The housing includes a gas meter connector and a motor housing. The gas meter connector is a tube with two ends open. The motor housing is a shell with an open upper end and a closed lower end. The upper end of the gas meter connector is used to connect to the gas inlet of the gas meter. The lower end of the gas meter connector is sealed with the upper end of the motor housing. A gas outlet is provided on the side of the gas meter connector, and the gas outlet is connected to the inside of the gas meter.

[0008] A transmission assembly, the transmission assembly includes a motor, a gear transmission structure, a screw-nut transmission structure and a pressure cover arranged in sequence inside the housing from bottom to top. The screw-nut transmission structure includes a nut sleeve and a screw. The nut sleeve is threadably connected to the screw. The pressure cover is arranged at the upper end port of the nut sleeve. The pressure cover is used to block the upper end port of the gas meter connector under the drive of the nut sleeve. The lower end of the screw is linked to the rotating shaft of the motor through the gear transmission structure. The upper end port of the motor housing is sealed with the screw.

[0009] A sealing assembly, the sealing assembly includes a first sealing structure, a second sealing structure and a third sealing structure, the first sealing structure is a raised structure arranged on a circle of the upper end face of the nut sleeve, the first sealing structure is located between the upper end face of the nut sleeve and the inner surface of the pressure cover, the second sealing structure is arranged between the upper end face of the edge of the nut sleeve and the lower end face of the edge of the pressure cover, the upper end face of the edge of the second sealing structure is provided with a curling edge bent inward, a circle of step surface is provided on the inner wall of the gas meter joint, the upper end face of the curling edge is abutted against the step surface, the third sealing structure is a raised structure arranged on a circle of the lower end face of the edge of the pressure cover, the third sealing structure is located between the lower end face of the edge of the pressure cover and the second sealing structure.

[0010] Specifically, plug plates are extended downward from the lower ends of both sides of the pressure cover, and a clamping hole is provided on the plug plate. The upper end of the nut sleeve is provided with an umbrella-shaped connecting ring, and a slot is provided on the connecting ring corresponding to the position of the plug plate. The bottom of the connecting ring corresponds to the position of the clamping hole and extends inward to form an elastic clamping plate that is inclined downward. The plug plate is inserted in the slot, and the elastic clamping plate is clamped in the clamping hole.

[0011] Specifically, the connecting ring includes a trapezoidal ring, a step ring and a horizontal ring arranged in sequence from top to bottom. The first sealing structure is arranged on the upper end face of the trapezoidal ring, and the position of the inner surface of the pressure cover corresponding to the step ring is provided with a lower step surface that matches the shape of the step ring. The second sealing structure is an annular structure, the curling edge is arranged on the outer ring edge of the annular structure, and the lower surface of the inner ring of the annular structure is provided with a circle of clamping protrusions. The position of the horizontal ring corresponding to the clamping protrusion is provided with a circle of grooves, the clamping protrusion is embedded in the groove, and the slot is arranged on the step ring.

[0012] Furthermore, a motor bracket and a transmission bracket are provided in the shell, and the transmission bracket includes a base plate and a support tube. The base plate is arranged at the upper end of the motor housing, and the support tube is vertically arranged in the gas meter joint. The nut sleeve is inserted into the support tube, and the lower end of the transmission bracket is connected to the upper end of the motor bracket. The motor is fixed in the motor housing through the motor bracket.

[0013] Furthermore, the sealing assembly includes a fourth sealing structure, and the fourth sealing structure includes a vertical seal and a horizontal seal. The vertical seal is a sealing cylinder that seals and wraps the connection between the support cylinder and the nut sleeve. The lower end of the sealing cylinder extends horizontally outward to extend the horizontal seal. The horizontal seal is arranged to fit the upper end surface of the base plate. The horizontal seal is sealed at the connection between the lower end of the gas meter connector, the upper end of the motor housing and the base plate.

[0014] Specifically, the gear transmission structure is arranged in the space between the transmission bracket and the motor bracket, and the gear transmission structure includes a motor gear, a first transition gear column, a transmission gear and a second transition gear column. The motor gear is connected to the rotating shaft of the motor, and the motor gear is engaged with the first transition gear column. The first transition gear column is coaxially connected to the transmission gear and linked together. The transmission gear is engaged with the second transition gear column, and the second transition gear column is coaxially connected to the lower end of the screw and linked together.

[0015] Specifically, the motor bracket includes a support and a fixing shell, the lower end of the support is arranged on the upper end of the fixing shell, the upper end of the support is connected to the bottom plate, and the fixing shell is sleeved on the outside of the motor.

[0016] Furthermore, a circle of elastic clamping ring is provided inwardly at the bottom of the fixed shell, and the upper end surface of the elastic clamping ring is abutted against the lower end surface of the motor.

[0017] Furthermore, an airtightness detection tube is provided at the bottom of the motor housing, and the airtightness detection tube is communicated with the gap between the motor housing and the motor.

[0018] Preferably, the pressure cover is an arc-shaped cap structure protruding toward the upper end of the gas meter connector.

[0019] The beneficial effects of the present invention are:

[0020] The utility model discloses a fully sealed spiral transmission gas meter internal automatic control valve which drives a gear transmission structure through a motor. The gear transmission structure drives the screw to rotate, and the screw drives the nut sleeve to move up and down in the vertical direction. The nut sleeve drives the pressure cover to block or leave the upper port of the gas meter connector, thereby realizing the on-off control of the gas path between the upper port of the gas meter connector and the gas outlet; the sealing between the pressure cover and the upper end face of the nut sleeve is realized by the first sealing structure, the sealing between the pressure cover and the nut sleeve is realized by the second sealing structure and the third sealing structure, and the sealing between the nut sleeve and the gas meter connector is realized by the curling of the third sealing structure, thereby greatly improving the airtightness of the utility model and solving the technical problem of low airtightness at the connection between the existing motor valve and the air inlet of the gas meter.

[0021] The utility model provides a fully sealed spiral transmission gas meter internal automatic control valve to solve the problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the internal structure of the automatic control valve in the fully sealed spiral transmission gas meter in the embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the appearance and structure of the automatic control valve in the fully sealed spiral transmission gas meter in the embodiment of the present application;

[0024] Figure 3 for Figure 1 A schematic diagram of the structure of the middle part;

[0025] Figure 4 This is a cross-sectional view of the nut sleeve in the embodiment of the present application;

[0026] Figure 5 This is a schematic structural diagram of the nut sleeve in an embodiment of the present application.

[0027] In the figure: 1-gas meter connector; 2-motor housing; 3-screw; 4-gear transmission structure; 5-motor bracket; 51-pillar; 52-fixed shell; 521-elastic clamping ring; 6-motor; 7-fourth sealing structure; 71-vertical seal; 72-horizontal seal: 8-nut sleeve; 81-first sealing structure; 82-trapezoidal ring; 83-step ring; 84-horizontal ring; 85-elastic clamping plate; 86-horizontal ring; 87-slot; 88-groove; 9-pressure cover; 91-third sealing structure; 92-insert plate; 93-clamping hole; 10-second sealing structure; 101-crimping edge; 102-clamping protrusion; 11-airtightness detection tube; 12-transmission bracket; 121-base plate; 122-support cylinder; 13-gas meter case threading hole sealing device. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0030] 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, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0032] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0033] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean 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 an indirect connection through an intermediate medium, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings.

[0035] Combine Figure 1 and Figure 2As shown, this embodiment is a fully sealed spiral transmission gas meter internal automatic control valve, comprising:

[0036] The housing includes a gas meter connector 1 and a motor housing 2. The gas meter connector 1 is a tube with two ends open, and the motor housing 2 is a shell with an upper end open and a lower end closed. The upper end of the gas meter connector 1 is used to connect to the gas inlet of the gas meter, and the lower end of the gas meter connector 1 is sealed with the upper end of the motor housing 2. A gas outlet is provided on the side of the gas meter connector 1, and the gas outlet is connected to the inside of the gas meter;

[0037] The transmission assembly includes a motor 6, a gear transmission structure 4, a screw 3 nut transmission structure and a pressure cover 9 sequentially arranged inside the housing from bottom to top. The screw 3 nut transmission structure includes a nut sleeve 8 and a screw 3. The nut sleeve 8 is threadedly connected to the screw 3. The pressure cover 9 is provided at the upper end port of the nut sleeve 8. The pressure cover 9 is used to block the upper end port of the gas meter connector 1 under the drive of the nut sleeve 8. The lower end of the screw 3 is linked to the rotating shaft of the motor 6 through the gear transmission structure 4. The upper end port of the motor housing 2 is sealed with the screw 3;

[0038] A sealing assembly, the sealing assembly includes a first sealing structure 81, a second sealing structure 10 and a third sealing structure 91, the first sealing structure 81 is a raised structure arranged on the upper end face of the nut sleeve 8, the first sealing structure 81 is located between the upper end face of the nut sleeve 8 and the inner surface of the pressure cover 9, the second sealing structure 10 is arranged between the upper end face of the edge of the nut sleeve 8 and the lower end face of the edge of the pressure cover 9, the upper end face of the edge of the second sealing structure 10 is provided with a curling edge 101 bent inward, the inner wall of the gas meter connector 1 is provided with a circle of step surface, the upper end face of the curling edge 101 is abutted against the step surface, the third sealing structure 91 is a raised structure arranged on the lower end face of the edge of the pressure cover 9, the third sealing structure 91 is located between the lower end face of the edge of the pressure cover 9 and the second sealing structure 10.

[0039] The utility model seals the lower end of the gas meter connector 1 with the upper end of the motor housing 2 through the first sealing structure 81, the second sealing structure 10, the third sealing structure 91, and the upper end port of the motor housing 2 is sealed with the screw 3, thereby achieving overall sealing of the motor chamber where the motor 6 is placed.

[0040] The utility model discloses a fully sealed spiral transmission automatic control valve in a gas meter. When the motor drives the gear transmission structure, the gear transmission structure drives the screw to rotate, and the screw drives the nut sleeve to move up and down in the vertical direction. The nut sleeve drives the pressure cover to block or leave the upper port of the gas meter connector, thereby realizing the on-off control of the gas path between the upper port of the gas meter connector and the gas outlet; the first sealing structure realizes the sealing between the pressure cover and the upper end face of the nut sleeve, the second sealing structure and the third sealing structure realize the sealing between the pressure cover and the nut sleeve, and the crimping of the third sealing structure realizes the sealing between the nut sleeve and the gas meter connector, thereby greatly improving the airtightness of the utility model and solving the technical problem of low airtightness at the connection between the existing motor valve and the gas meter inlet. The utility model has good air path on-off control effect, compact structure, easy installation and good airtightness.

[0041] Combine Figure 1 and Figure 5 As shown, in some embodiments, plug plates 92 are respectively extended downward from the lower ends of both sides of the pressure cover 9, and a clamping hole 93 is provided on the plug plates 92. The upper end of the nut sleeve 8 is provided with an umbrella-shaped connecting ring, and a slot 87 is provided on the connecting ring corresponding to the position of the plug plates 92. The bottom of the connecting ring extends inwardly from the position of the clamping hole 93 to extend an elastic clamping plate 85 that is tilted downward. The plug plates 92 are inserted into the slots 87, and the elastic clamping plate 85 is clamped in the clamping hole 93. Through the cooperation between the slots 87 and the plug plates 92, the nut sleeve 8 and the pressure cover 9 can be plugged in and out of each other. Through the cooperation between the elastic clamping plate 85 and the clamping hole 93, the pressure cover 9 can be firmly fixed on the nut sleeve 8, thereby preventing the pressure cover 9 from falling off and improving the sealing effect and durability of the utility model.

[0042] Combine Figure 1 、 Figure 3 and Figure 4 As shown, in some embodiments, the connecting ring includes a trapezoidal ring 82, a step ring 83 and a horizontal ring 86 arranged in sequence from top to bottom, the first sealing structure 81 is arranged on the upper end face of the trapezoidal ring 82, the inner surface of the pressure cover 9 is provided with a lower step surface that matches the shape of the step ring 83 at a position corresponding to the step ring 83, the second sealing structure 10 is an annular structure, the curling edge 101 is provided on the outer ring edge of the annular structure, the lower surface of the inner ring of the annular structure is provided with a circle of snap-fitting protrusions 102, the horizontal ring 86 is provided with a circle of grooves 84 at a position corresponding to the snap-fitting protrusions 102, the snap-fitting protrusions 102 are embedded in the grooves 84, and the slots 87 are provided on the step ring 83.

[0043] like Figure 1As shown, in some embodiments, a motor bracket 5 and a transmission bracket 12 are provided in the housing. The transmission bracket 12 includes a base plate 121 and a support cylinder 122. The base plate 121 is provided at the upper end of the motor housing 2. The support cylinder 122 is vertically provided in the gas meter connector 1. The nut sleeve 8 is inserted into the support cylinder 122. The lower end of the transmission bracket 12 is connected to the upper end of the motor bracket 5. The motor 6 is fixed in the motor housing 2 through the motor bracket 5. This facilitates motor installation and has a compact structure.

[0044] like Figure 1 As shown, in some embodiments, the sealing assembly includes a fourth sealing structure 7, and the fourth sealing structure 7 includes a vertical seal 71 and a horizontal seal 72. The vertical seal 71 is a sealing cylinder that seals and wraps the connection between the support cylinder 122 and the nut sleeve 8. The lower end of the sealing cylinder extends horizontally outward to extend the horizontal seal 72. The horizontal seal 72 is arranged to fit the upper end surface of the base plate 121. The horizontal seal 72 is sealed at the connection between the lower end of the gas meter connector 1, the upper end of the motor housing 2 and the base plate 121.

[0045] like Figure 1 As shown, in some embodiments, the gear transmission structure 4 is preferably arranged in the space between the transmission bracket 12 and the motor bracket 5, and the gear transmission structure 4 includes a motor gear, a first transition gear column, a transmission gear and a second transition gear column. The motor gear is connected to the rotating shaft of the motor 6, the motor gear is meshed with the first transition gear column, the first transition gear column is coaxially connected and linked with the transmission gear, the transmission gear is meshed with the second transition gear column, and the second transition gear column is coaxially connected and linked with the lower end of the screw 3. When used, the motor 6 is started, the rotating shaft of the motor 6 drives the first transition gear column to rotate, the first transition gear column is linked with the transmission gear, the transmission gear drives the second transition gear column to mesh, and the second transition gear column drives the screw 3 to rotate, thereby driving the nut sleeve 8 to move upward or downward. The upward movement or downward movement depends on the direction of rotation of the motor shaft. Replacing the direction of the motor shaft can change the movement direction of the nut sleeve 8.

[0046] like Figure 1 As shown, in some embodiments, the motor bracket 5 includes a pillar 51 and a fixed shell 52, the lower end of the pillar 51 is arranged on the upper end of the fixed shell 52, the upper end of the pillar 51 is connected to the base plate 121, and the fixed shell 52 is sleeved on the outside of the motor 6.

[0047] like Figure 1As shown, in some embodiments, the bottom of the fixed shell 52 is provided with an elastic collar 521 facing inward, and the upper end surface of the elastic collar 521 is abutted against the lower end surface of the motor 6. This improves the installation stability of the motor 6.

[0048] like Figure 2 As shown, in some embodiments, an airtightness detection tube 11 is provided at the bottom of the motor housing 2. The airtightness detection tube 11 is connected to the gap between the motor housing 2 and the motor 6. This facilitates the internal airtightness testing of the present invention. During the airtightness test, the test gas enters the motor chamber through the airtightness detection tube 11. After the airtightness test is completed, the airtightness detection tube 11 needs to be sealed.

[0049] like Figure 2 As shown, in some embodiments, the gas meter case wire threading hole at the bottom of the motor housing 2 is further externally connected to a gas meter case wire threading hole blocking device 13 .

[0050] Combine Figure 1 and Figure 3 As shown, the pressure cover 9 is an arc-shaped cap structure protruding toward the upper end of the gas meter connector 1. This allows the pressure cover 9 to fit closely to the upper end port of the gas meter connector 1, thereby improving the airtightness and gas path on-off control effect of the present invention.

[0051] The utility model proposes a fully sealed spiral transmission gas meter internal automatic control valve to solve the technical problem of low airtightness at the connection between the existing motor valve and the gas meter inlet. The utility model has good gas path on-off control effect, compact structure, easy installation and good airtightness.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A fully sealed spiral transmission gas meter automatic control valve, characterized in that: include: A housing, the housing comprising a gas meter connector (1) and a motor housing (2), the gas meter connector (1) being a tube with both ends open, the motor housing (2) being a housing with an upper end open and a lower end closed, the upper end of the gas meter connector (1) being used to connect to a gas inlet of a gas meter, the lower end of the gas meter connector (1) being sealedly connected to the upper end of the motor housing (2), a gas outlet being provided on a side surface of the gas meter connector (1), the gas outlet being communicated with the interior of the gas meter; A transmission assembly, the transmission assembly comprising a motor (6), a gear transmission structure (4), a screw (3) nut transmission structure and a pressure cover (9) sequentially arranged inside the housing from bottom to top, the screw (3) nut transmission structure comprising a nut sleeve (8) and a screw (3), the nut sleeve (8) being threadably connected to the screw (3), the pressure cover (9) being arranged at the upper end port of the nut sleeve (8), the pressure cover (9) being used to block the upper end port of the gas meter connector (1) under the drive of the nut sleeve (8), the lower end of the screw (3) being linked to the rotating shaft of the motor (6) through the gear transmission structure (4), and the upper end port of the motor housing (2) being sealed and connected to the screw (3); The sealing assembly comprises a first sealing structure (81), a second sealing structure (10) and a third sealing structure (91), wherein the first sealing structure (81) is a raised structure arranged on the upper end face of the nut sleeve (8), the first sealing structure (81) is located between the upper end face of the nut sleeve (8) and the inner surface of the pressure cover (9), and the second sealing structure (10) is arranged between the upper end face of the edge of the nut sleeve (8) and the lower end face of the edge of the pressure cover (9). The second sealing structure (10) is provided with an inwardly curved edge (101) on an upper end face along an edge of the gas meter connector (1). A step surface is provided on the inner wall of the gas meter connector (1). The upper end face of the curling edge (101) is abutted against the step surface. The third sealing structure (91) is a raised structure provided on a lower end face along an edge of the pressure cover (9). The third sealing structure (91) is located between the lower end face along the edge of the pressure cover (9) and the second sealing structure (10).

2. A fully sealed spiral transmission gas meter automatic control valve according to claim 1, characterized in that: The lower ends of both sides of the pressure cover (9) extend downwardly to form plug plates (92), and the plug plates (92) are provided with a clamping hole (93). The upper end of the nut sleeve (8) is provided with an umbrella-shaped connecting ring, and a slot (87) is provided on the connecting ring at a position corresponding to the plug plate (92). The bottom of the connecting ring extends inwardly to form an elastic clamping plate (85) arranged obliquely downward at a position corresponding to the clamping hole (93). The plug plate (92) is inserted into the slot (87), and the elastic clamping plate (85) is clamped in the clamping hole (93).

3. A fully sealed spiral transmission gas meter automatic control valve according to claim 2, characterized in that: The connecting ring includes a trapezoidal ring (82), a step ring (83) and a horizontal ring (86) arranged in sequence from top to bottom, the first sealing structure (81) is arranged on the upper end face of the trapezoidal ring (82), the inner surface of the pressure cover (9) is provided with a lower step surface that matches the shape of the step ring (83) at a position corresponding to the step ring (83), the second sealing structure (10) is an annular structure, the curling edge (101) is provided on the outer ring edge of the annular structure, the lower surface of the inner ring of the annular structure is provided with a circle of clamping protrusions (102), the horizontal ring (86) is provided with a circle of grooves (84) at a position corresponding to the clamping protrusions (102), the clamping protrusions (102) are embedded in the grooves (84), and the slots (87) are provided on the step ring (83).

4. The fully sealed spiral transmission gas meter automatic control valve according to claim 1, characterized in that: A motor bracket (5) and a transmission bracket (12) are provided in the housing. The transmission bracket (12) comprises a base plate (121) and a support cylinder (122). The base plate (121) is provided at the upper end of the motor housing (2). The support cylinder (122) is vertically provided in the gas meter connector (1). The nut sleeve (8) is inserted into the support cylinder (122). The lower end of the transmission bracket (12) is connected to the upper end of the motor bracket (5). The motor (6) is fixed in the motor housing (2) via the motor bracket (5).

5. The fully sealed spiral transmission gas meter automatic control valve according to claim 4, characterized in that: The sealing assembly includes a fourth sealing structure (7), and the fourth sealing structure (7) includes a vertical sealing member (71) and a horizontal sealing member (72). The vertical sealing member (71) is a sealing member that seals and wraps the connection between the support tube (122) and the nut sleeve (8). The lower end of the sealing member extends horizontally outward to extend the horizontal sealing member (72). The horizontal sealing member (72) is arranged to fit the upper end surface of the bottom plate (121). The horizontal sealing member (72) is sealingly arranged at the connection between the lower end of the gas meter connector (1), the upper end of the motor housing (2) and the bottom plate (121).

6. The fully sealed spiral transmission automatic control valve in a gas meter according to claim 4, characterized in that: The gear transmission structure (4) is arranged in the space between the transmission bracket (12) and the motor bracket (5), and the gear transmission structure (4) includes a motor gear, a first transition gear column, a transmission gear, and a second transition gear column. The motor gear is connected to the rotating shaft of the motor (6), the motor gear is meshed with the first transition gear column, the first transition gear column is coaxially connected to the transmission gear and linked together, the transmission gear is meshed with the second transition gear column, and the second transition gear column is coaxially connected to the lower end of the screw (3) and linked together.

7. The fully sealed spiral transmission gas meter automatic control valve according to claim 4, characterized in that: The motor bracket (5) comprises a support (51) and a fixing shell (52), the lower end of the support (51) is arranged at the upper end of the fixing shell (52), the upper end of the support (51) is connected to the bottom plate (121), and the fixing shell (52) is sleeved on the outside of the motor (6).

8. The fully sealed spiral transmission gas meter automatic control valve according to claim 7, characterized in that: The bottom of the fixed shell (52) is provided with a circle of elastic clamping ring (521) facing inward, and the upper end surface of the elastic clamping ring (521) is abutted against the lower end surface of the motor (6).

9. The fully sealed spiral transmission gas meter automatic control valve according to claim 1, characterized in that: An airtightness detection tube is provided at the bottom of the motor housing (2), and the airtightness detection tube is communicated with the gap between the motor housing (2) and the motor (6).

10. The fully sealed spiral transmission gas meter automatic control valve according to claim 1, characterized in that: The pressure cover (9) is an arc-shaped cap structure protruding toward the upper end of the gas meter connector (1).

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