Angle-adjustable gas meter sealing detection positioning tool

Abstract

The application discloses an angle-adjustable sealing detection positioning tool for a gas meter, and relates to the technical field of positioning tools.The angle-adjustable sealing detection positioning tool for the gas meter comprises a supporting frame and a positioning hanging ring installed at the bottom of the inner side of the supporting frame.The supporting frame comprises a right-angle frame body, and an annular guide groove is formed in the bottom of the inner side of the right-angle frame body and close to the position of a circular hole.The positioning hanging ring is installed in the bottom of the inner side of the right-angle frame body through the annular guide groove.An angle adjustment assembly is installed on the top of the surface of the right-angle frame body.The positioning hanging ring comprises an annular hanging piece and a connecting clamping tooth.The bottom of the annular hanging piece is fixedly connected with the top of the connecting clamping tooth.An internal thread hole is formed in the center of the annular hanging piece.A limiting base plate is fixedly connected with the side of the top of the annular hanging piece.The angle-adjustable sealing detection positioning tool for the gas meter has the advantages that accurate positioning is achieved, positioning is convenient, installation and dismounting are convenient, the hanging ring and the upper surfaces of the two joints of the gas meter keep a constant preset distance, and the angle-adjustable sealing detection positioning tool for the gas meter is safe and reliable.

Description

Technical Field

[0001] This invention relates to the field of positioning tooling technology, specifically to an adjustable-angle positioning tooling for testing the sealing performance of a gas meter. Background Technology

[0002] A diaphragm gas meter is a widely used gas metering device in homes and commercial establishments. It operates based on the principle of volumetric metering. When gas flows in from the inlet, the pressure difference between the inlet and outlet pushes the diaphragm to move within the metering chamber. This movement of the diaphragm drives the gas distribution mechanism to coordinate gas distribution, enabling continuous reciprocating motion. Each reciprocating motion of the diaphragm releases a certain amount of gas. An internal mechanical structure converts the linear reciprocating motion of the diaphragm into circular motion, which in turn drives a mechanical roller counter to rotate, thus displaying the gas volume.

[0003] In the field of diaphragm gas meter manufacturing, the sealing performance of the gas meter is crucial and directly affects user safety. Currently, the sealing performance of gas meters is mainly ensured through "water-based sealing test" and "dry-based sealing test".

[0004] Currently, in existing technologies, before gas meter sealing tests, operators need to visually observe and position the gas meter during installation, which makes it inconvenient to accurately position the gas meter. This can easily lead to misalignment during installation, causing the tooling ring and the upper surfaces of the two gas meter connectors to lose their constant preset distance, resulting in poor sealing and affecting the accuracy of gas meter sealing tests. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention is implemented through the following technical solution: An adjustable-angle gas meter sealing performance testing positioning fixture, comprising: Support frame, and positioning hooks installed on the bottom inner side of the support frame; The support frame includes a right-angled frame body. A circular hole is provided at the bottom of the inner side of the right-angled frame body. An annular guide rail groove is provided at the bottom of the inner side of the right-angled frame body near the circular hole. The positioning hanging ring is installed at the bottom of the inner side of the right-angled frame body through the annular guide rail groove. An angle adjustment component is installed at the top of the surface of the right-angled frame body. The positioning hanging ring includes an annular hanging piece and a connecting tooth. The bottom end of the connecting tooth is inserted into the interior of the annular guide rail groove. The bottom of the annular hanging piece is fixedly connected to the top of the connecting tooth. An internal threaded hole is opened at the center of the annular hanging piece. A limiting plate is fixedly connected to the side of the top of the annular hanging piece. By inserting the connecting tooth into the interior of the annular guide rail groove, the positioning hanging ring is installed on the right-angle frame as a whole, making the installation and disassembly of the positioning hanging ring as a whole convenient. The bottom of the right-angled frame is equipped with auxiliary components.

[0006] Preferably, there are two right-angled frames, and the two right-angled frames are installed at the same height, and the annular guide rail groove and the circular hole are concentric circles.

[0007] Preferably, the angle adjustment assembly includes a supporting round rod and a connecting bushing. The outer end of the supporting round rod is fixedly installed between the top of the surface of the right-angled frame and the outer end of the supporting round rod away from the right-angled frame. The top of the surface of the connecting bushing has a strip-shaped hole, and a locking screw is installed at the center of the strip-shaped hole. Through the hole on the edge of the surface of the connecting bushing, and with the support round rod connected, the right-angled frame can be installed in a designated position. Rotating the right-angled frame causes the supporting round rod to rotate, adjusting the angle of the positioning ring installed at the bottom of the inner side of the right-angled frame. Adjusting to a suitable angle ensures that the gas meter's inlet and outlet are coaxially fitted with the sealing joint of the testing equipment, providing strong adaptability and facilitating the testing of the gas meter.

[0008] Preferably, the axis of the supporting round rod is installed perpendicular to the surface of the right-angled frame, the supporting round rod is rotatably installed between the supporting round rod and the connecting bushing, and the surface of the supporting round rod away from the right-angled frame is in contact with the inner surface of the connecting bushing.

[0009] By passing the gas meter's gas inlet through the center of the circular hole and twisting the annular bracket, the internal threaded hole at the center of the annular bracket is threaded into the gas meter's gas inlet, providing a stable and reliable connection base that is less prone to loosening.

[0010] Preferably, the strip hole is arc-shaped, and the locking screw passes through the center of the strip hole. The external thread on the surface of the locking screw is threadedly installed with the end of the support rod away from the right-angled frame. By inserting the connecting teeth into the groove of the annular guide rail, the annular hanging plate can be limited, so that after the gas meter's gas port is connected to the internal threaded hole at the center of the annular hanging plate, the gas meter is positioned, preventing the gas meter from shifting. This helps to accurately test the gas meter's sealing performance in the future.

[0011] Preferably, the annular mounting plate is installed directly above the annular guide rail groove. The internal threaded hole and the circular hole are concentric circles, and the inner diameter of the internal threaded hole is smaller than the inner diameter of the circular hole. The limiting plate is arc-shaped, and the center of the limiting plate coincides with the central axis of the annular mounting plate. The limiting plate is installed on the top of the annular mounting plate, and under the support of the annular mounting plate, it can ensure that the annular mounting plate and the upper surfaces of the two gas meter connectors maintain a constant preset distance. This ensures that when the cylinder gasket is pressed down to seal, the two meter connectors bear uniform pressure, solving the problem of one-sided sealing failure caused by uneven force, improving the first-pass yield rate, and reducing rework.

[0012] Preferably, the connecting teeth are installed vertically, and there are four connecting teeth, which are evenly distributed at the bottom of the annular hanging plate.

[0013] Preferably, the auxiliary component includes a connecting bracket and a wedge-shaped seat. The top of the connecting bracket is detachably fixedly installed on the bottom side of the right-angled frame surface. A straight hole is formed in the middle of the interior of the wedge-shaped seat. The bottom of the connecting bracket passes through the straight hole. The wedge-shaped seat is slidably installed between the bottom side of the connecting bracket and the inner wall of the straight hole. A reset elastic strip is fixedly installed between the bottom side of the connecting bracket and the inner wall of the straight hole. A right-angle clamping plate is fixedly connected to the surface of the wedge-shaped seat at the end away from the connecting bracket. A material-holding port is formed in the middle of the surface of the right-angle clamping plate, through which the gas meter port to be tested passes. The gas meter's top is attached to the bottom of the right-angle clamp, and the gas meter is pushed upwards. The right-angle clamp receives the upward force from the gas meter and is connected to the wedge-shaped seat. The wedge-shaped seat is slidably supported by the connecting bracket, allowing the inclined surface of the wedge-shaped seat to act as a guide. The wedge-shaped seat moves the right-angle clamp to the side. The reset elastic strip is arc-shaped and will be elastically straightened by the pulling force. The inner circular surface of the clamping port engages with the gas port of the gas meter, thus securing the gas port. The internal threaded hole at the center of the annular hanging plate is threaded into the gas port of the gas meter, making the gas meter more stable and preventing it from falling off.

[0014] Preferably, the wedge-shaped seat is installed directly below the bottom side of the right-angled frame. The outer slope of the wedge-shaped seat fits into the bend at the bottom of the right-angled frame. The end of the right-angled clamp away from the wedge-shaped seat fits into the bottom of the right-angled frame. Twisting the annular hanging piece in the opposite direction to unscrew it separates the annular hanging piece from the gas meter's gas port. The upward pressure of the gas meter on the right-angled clamp disappears, and under the elastic force of the reset elastic strip, the wedge-shaped seat is pulled by the reset elastic strip. The wedge-shaped seat drives the right-angled clamp to move in the opposite direction to reset, so that subsequent re-inspection can be performed. This is suitable for batch testing.

[0015] Preferably, the reset elastic strip is arc-shaped, and the material clamping opening is located directly below the circular hole.

[0016] This invention provides an adjustable-angle positioning fixture for testing the sealing performance of a gas meter. It offers the following advantages: 1. This adjustable-angle gas meter sealing test positioning fixture allows for rotation of the right-angle frame, causing the supporting rod to rotate and adjusting the angle of the positioning ring installed at the bottom of the inner side of the right-angle frame. Adjusting to a suitable angle ensures that the gas meter's inlet and outlet are coaxially fitted with the sealing joint of the testing equipment. It is highly adaptable and facilitates the testing of gas meters.

[0017] 2. The adjustable-angle gas meter sealing test positioning fixture uses connecting teeth to insert into the groove of the annular guide rail, so that the positioning ring is installed on the right-angle frame, making the installation and disassembly of the positioning ring convenient.

[0018] Third, the adjustable-angle gas meter sealing test positioning fixture uses the gas meter's gas port to pass through the center of the circular hole, and the annular hanger is screwed on so that the internal threaded hole at the center of the annular hanger is threadedly installed with the gas meter's gas port, providing a stable and reliable connection base and preventing loosening.

[0019] Fourth, this adjustable-angle gas meter sealing performance testing and positioning fixture, by inserting the connecting teeth into the groove of the annular guide rail, can limit the annular hanging plate, so that after the gas port of the gas meter is connected to the internal threaded hole at the center of the annular hanging plate, the gas meter is positioned, so that the gas meter will not be offset, which helps to accurately test the sealing performance of the gas meter in the future.

[0020] 5. The adjustable-angle gas meter sealing test positioning fixture is installed on the top of the annular bracket through a limiting plate. With the support of the annular bracket, it can ensure that the annular bracket and the upper surface of the two gas meter joints maintain a constant preset distance. When the cylinder gasket is pressed down to seal, the two meter joints bear uniform pressure, which solves the problem of one-sided sealing failure caused by uneven force, improves the first-pass yield rate, and reduces the need for rework.

[0021] VI. This adjustable-angle gas meter sealing test positioning fixture utilizes a right-angle clamping plate that receives upward force from the gas meter. This causes the inclined surface of the wedge-shaped seat to act as a guide, and the wedge-shaped seat drives the right-angle clamping plate to move to the side. The reset elastic strip is arc-shaped and will be elastically straightened by tensile force. The inner circular surface of the clamping port engages with the gas port of the gas meter, thus securing the gas port. The internal threaded hole at the center of the annular hanging plate is threaded into the gas port of the gas meter, making the gas meter more stable and preventing it from falling off.

[0022] VII. This adjustable-angle gas meter sealing test positioning fixture, by reversing the annular hanger to unscrew it, separates the annular hanger from the gas meter's gas port. The upward pressure of the gas meter on the right-angle clamping plate disappears, and under the elastic force of the reset elastic strip, the wedge seat is pulled by the reset elastic strip. The wedge seat drives the right-angle clamping plate to move in the opposite direction to reset, so that subsequent retesting can be performed. It is suitable for batch testing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the adjustable-angle gas meter sealing test positioning fixture of the present invention. Figure 2This is a schematic diagram of the back structure of the adjustable-angle gas meter sealing test positioning fixture of the present invention. Figure 3 This is a schematic diagram of the overall structure of the support frame of the present invention; Figure 4 This is a schematic diagram of the connection structure between the angle adjustment component and the right-angled frame of the present invention; Figure 5 This is a schematic diagram of the connection structure between the positioning ring and the right-angled frame of the present invention; Figure 6 This is a schematic diagram of the disassembled structure between the positioning ring and the right-angled frame of the present invention; Figure 7 This is a schematic diagram of the disassembled, bottom-view structure between the positioning ring and the right-angled frame of the present invention; Figure 8 This is a schematic diagram of the connection structure between the auxiliary component and the right-angled frame of the present invention; Figure 9 This is a schematic diagram of the overall structure of the auxiliary component of the present invention.

[0024] In the diagram: 1. Support frame; 2. Positioning ring; 3. Auxiliary components; 101. Right-angle frame; 102. Circular hole; 103. Annular guide rail groove; 104. Angle adjustment component; 1041. Support rod; 1042. Connecting bushing; 1043. Strip hole; 1044. Locking screw; 201. Annular hanging piece; 202. Connecting teeth; 203. Internal threaded hole; 204. Limiting base plate; 301. Connecting bracket; 302. Wedge seat; 303. Straight hole; 304. Reset elastic strip; 305. Right-angle clamping plate; 306. Material clamping port. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] For the first embodiment, please refer to... Figure 1-4 The present invention provides a technical solution: An adjustable-angle gas meter sealing performance testing positioning fixture, comprising: Support frame 1, and positioning hanging ring 2 installed on the bottom of the inner side of support frame 1; The support frame 1 includes a right-angled frame 101. A circular hole 102 is provided at the bottom of the inner side of the right-angled frame 101. An annular guide rail groove 103 is provided at the bottom of the inner side of the right-angled frame 101 and near the circular hole 102. The positioning hanging ring 2 is installed at the bottom of the inner side of the right-angled frame 101 through the annular guide rail groove 103. An angle adjustment component 104 is installed on the top of the surface of the right-angled frame 101. There are two right-angled frames 101, and the two right-angled frames 101 are installed at the same height. The annular guide rail groove 103 and the circular hole 102 are concentric circles.

[0027] The angle adjustment assembly 104 includes a support rod 1041 and a connecting sleeve 1042. The outer end of the support rod 1041 is fixedly installed between the outer end and the top of the surface of the right-angled frame 101. The connecting sleeve 1042 is installed at the end of the support rod 1041 away from the right-angled frame 101. A strip hole 1043 is opened on the top of the surface of the connecting sleeve 1042. A locking screw 1044 is installed at the center of the strip hole 1043. The right-angled frame 101 can be installed in a designated position by opening a hole at the edge of the surface of the connecting sleeve 1042 and connecting it with the support rod 1041. Rotating the right-angled frame 101 causes the support rod 1041 to rotate, thereby adjusting the angle of the positioning ring 2 installed at the bottom of the inner side of the right-angled frame 101. Adjusting it to a suitable angle ensures that the gas meter's inlet and outlet are coaxially fitted with the sealing joint of the testing equipment. This provides strong adaptability and facilitates the testing of the gas meter.

[0028] The axis of the supporting round rod 1041 is installed perpendicular to the surface of the right-angled frame 101. The supporting round rod 1041 is rotatably installed between the supporting round rod 1041 and the connecting bushing 1042. The end of the supporting round rod 1041 that is away from the right-angled frame 101 is in contact with the inner side of the connecting bushing 1042.

[0029] The slot 1043 is arc-shaped, and the locking screw 1044 passes through the center of the slot 1043. The external thread on the surface of the locking screw 1044 is threadedly installed between the end of the support rod 1041 away from the right-angled frame 101.

[0030] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figures 1 to 7 As shown: The positioning ring 2 includes an annular hanging piece 201 and a connecting tooth 202. The bottom end of the connecting tooth 202 is inserted into the interior of the annular guide rail groove 103. The bottom of the annular hanging piece 201 is fixedly connected to the top of the connecting tooth 202. An internal threaded hole 203 is provided at the center of the annular hanging piece 201. A limiting base plate 204 is fixedly connected to the side of the top of the annular hanging piece 201. By inserting the connecting tooth 202 into the interior of the annular guide rail groove 103, the positioning ring 2 is installed on the right-angled frame 101. The installation and disassembly of the positioning ring 2 are convenient.

[0031] The annular mounting plate 201 is installed directly above the annular guide rail groove 103. The internal threaded hole 203 and the circular hole 102 are concentric circles. The inner diameter of the internal threaded hole 203 is smaller than the inner diameter of the circular hole 102. The limiting plate 204 is arc-shaped, and the center of the limiting plate 204 coincides with the central axis of the annular mounting plate 201. The gas port of the gas meter passes through the center of the circular hole 102, and the annular mounting plate 201 is screwed to make the internal threaded hole 203 at the center of the annular mounting plate 201 threadedly installed with the gas port of the gas meter, providing a stable and reliable connection base and preventing loosening.

[0032] The connecting teeth 202 are installed vertically. There are four connecting teeth 202, and the four connecting teeth 202 are evenly distributed at the bottom of the annular hanging plate 201. By inserting the connecting teeth 202 into the interior of the annular guide rail groove 103, the annular hanging plate 201 can be limited. After the gas meter's gas port is connected to the internal threaded hole 203 at the center of the annular hanging plate 201, the gas meter is positioned so that the gas meter will not be offset. This helps to accurately test the gas meter's sealing performance in the future.

[0033] The limiting plate 204 is installed on the top of the annular hanging plate 201. With the support of the annular hanging plate 201, it can ensure that the annular hanging plate 201 and the upper surface of the two gas meter connectors maintain a constant preset distance, so that when the cylinder gasket is pressed down to seal, the two meter connectors bear uniform pressure.

[0034] The third embodiment is based on the first and second embodiments; please refer to [link / reference]. Figures 1 to 9 As shown: Auxiliary component 3 includes a connecting bracket 301 and a wedge-shaped seat 302. The top of the connecting bracket 301 is detachably fixed to the side of the bottom surface of the right-angled frame 101. A straight hole 303 is opened in the middle of the interior of the wedge-shaped seat 302. The bottom of the connecting bracket 301 passes through the inside of the straight hole 303. The wedge-shaped seat 302 is slidably installed between the bottom side of the connecting bracket 301 and the inner wall of the straight hole 303. A reset elastic strip 304 is fixedly installed between the side of the bottom of the connecting bracket 301 and the inner wall of the straight hole 303. A right-angle clamping plate 305 is fixedly connected to the surface of the wedge-shaped seat 302 and the end away from the connecting bracket 301. A material clamping port 306 is opened in the middle of the surface of the right-angle clamping plate 305. The gas meter port to be tested is passed through the material clamping port 306. The gas meter is pushed upwards by its top fitting against the bottom of the right-angle clamp 305. The right-angle clamp 305 is then subjected to the upward force of the gas meter. The right-angle clamp 305 and the wedge-shaped seat 302 are connected together, and the wedge-shaped seat 302 is slidably supported by the connecting bracket 301. The inclined surface of the wedge-shaped seat 302 acts as a guide. The wedge-shaped seat 302 drives the right-angle clamp 305 to move to the side. The reset elastic strip 304 is arc-shaped and is stretched and straightened by the pulling force. The inner circular surface of the clamping port 306 is engaged with the gas port of the gas meter, thus securing the gas port. The internal threaded hole 203 at the center of the annular hanging piece 201 is threaded into the gas port of the gas meter, making the gas meter more stable and preventing it from falling off.

[0035] The wedge-shaped seat 302 is installed directly below the bottom side of the right-angled frame 101. The outer slope of the wedge-shaped seat 302 fits into the bend at the bottom of the right-angled frame 101. The end of the right-angled plate 305 away from the wedge-shaped seat 302 fits into the bottom of the right-angled frame 101.

[0036] After the gas meter's sealing test is completed, the annular hanger 201 is twisted in the reverse direction to remove the thread, causing the annular hanger 201 to separate from the gas meter's gas inlet. The upward pressure of the gas meter on the right-angle clamp 305 disappears, and under the elastic force of the reset elastic strip 304, the wedge seat 302 is pulled by the reset elastic strip 304. The wedge seat 302 drives the right-angle clamp 305 to move in the reverse direction to reset, so that it can be tested again later. This method is suitable for batch testing.

[0037] The reset elastic strip 304 is arc-shaped, and the material clamping port 306 is located directly below the circular hole 102.

[0038] In use, firstly, a hole is opened at the edge of the connecting bushing 1042, and with the support rod 1041 connected, the right-angled frame 101 can be installed in the designated position. Then, the right-angled frame 101 is rotated, so that the support rod 1041 rotates, and the angle of the positioning ring 2 installed at the bottom of the inner side of the right-angled frame 101 is adjusted to a suitable angle. Furthermore, by inserting the connecting teeth 202 into the interior of the annular guide rail groove 103, the positioning ring 2 is installed onto the right-angled frame 101, making the installation and disassembly of the positioning ring 2 convenient. At this point, the operator passes the gas meter port to be tested through the clamping port 306, and uses the top of the gas meter to fit against the bottom of the right-angle clamping plate 305, and pushes the gas meter upward. The right-angle clamping plate 305 will be subjected to the upward pushing force of the gas meter, and is connected to the wedge seat 302 through the right-angle clamping plate 305, and the wedge seat 302 is slidably supported by the connecting bracket 301, so that the inclined surface of the wedge seat 302 plays a guiding role. The wedge seat 302 drives the right-angle clamping plate 305 to move to the side. The reset elastic strip 304 is arc-shaped and will be elastically straightened by the pulling force. The inner circular surface of the clamping port 306 is engaged with the gas meter port position, which can clamp the gas meter port. The internal thread hole 203 at the center of the annular hanging piece 201 is threadedly installed with the gas meter port, making the gas meter more stable and preventing it from falling off. At the same time, the gas meter's gas inlet passes through the center of the circular hole 102, and the annular hanging plate 201 is turned so that the internal threaded hole 203 at the center of the annular hanging plate 201 is threadedly installed with the gas meter's gas inlet, providing a stable and reliable connection base and preventing loosening. Furthermore, by inserting the connecting tooth 202 into the interior of the annular guide groove 103, the annular hanging plate 201 can be limited, so that after the gas meter's gas port is connected to the internal threaded hole 203 at the center of the annular hanging plate 201, the gas meter is positioned, preventing the gas meter from shifting. And by installing the limiting plate 204 on the top of the annular hanging plate 201, and under the support of the annular hanging plate 201, it can be ensured that the annular hanging plate 201 and the upper surface of the two gas meter joints maintain a constant preset distance, so that when the cylinder gasket is pressed down to seal, the two meter joints bear uniform pressure, which helps to accurately test the gas meter's sealing performance in the future. After the gas meter's sealing test is completed, the annular hanger 201 is twisted in the reverse direction to remove the thread, causing the annular hanger 201 to separate from the gas meter's gas inlet. The upward pressure of the gas meter on the right-angle clamp 305 disappears, and under the elastic force of the reset elastic strip 304, the wedge seat 302 is pulled by the reset elastic strip 304. The wedge seat 302 drives the right-angle clamp 305 to move in the reverse direction to reset, so that it can be tested again later. This method is suitable for batch testing.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable-angle gas meter sealing performance testing and positioning fixture, characterized in that, include: Support frame (1), and positioning ring (2) installed on the bottom of the inner side of the support frame (1); The support frame (1) includes a right-angled frame (101). A circular hole (102) is provided at the bottom of the inner side of the right-angled frame (101). An annular guide groove (103) is provided at the bottom of the inner side of the right-angled frame (101) and near the circular hole (102). The positioning hanging ring (2) is installed at the bottom of the inner side of the right-angled frame (101) through the annular guide groove (103). An angle adjustment component (104) is installed on the top of the surface of the right-angled frame (101). The positioning ring (2) includes an annular hanging piece (201) and a connecting tooth (202). The bottom end of the connecting tooth (202) is inserted into the interior of the annular guide groove (103). The bottom of the annular hanging piece (201) is fixedly connected to the top of the connecting tooth (202). An internal thread hole (203) is opened at the center of the annular hanging piece (201). A limiting plate (204) is fixedly connected to the side of the top of the annular hanging piece (201). The bottom of the right-angled frame (101) is equipped with an auxiliary component (3).

2. The adjustable-angle gas meter sealing performance testing and positioning fixture according to claim 1, characterized in that: There are two right-angled frames (101), and the two right-angled frames (101) are installed at the same height. The annular guide rail groove (103) and the circular hole (102) are concentric circles.

3. The adjustable-angle gas meter sealing performance testing and positioning fixture according to claim 1, characterized in that: The angle adjustment assembly (104) includes a support rod (1041) and a connecting bushing (1042). The outer end of the support rod (1041) is fixedly installed between the outer end and the top of the surface of the right-angled frame (101). The connecting bushing (1042) is installed at the end of the support rod (1041) away from the right-angled frame (101). A strip hole (1043) is opened on the top of the surface of the connecting bushing (1042), and a locking screw (1044) is installed at the center of the strip hole (1043).

4. The adjustable-angle gas meter sealing performance testing and positioning fixture according to claim 3, characterized in that: The axis of the supporting round rod (1041) is installed perpendicular to the surface of the right-angled frame (101). The supporting round rod (1041) is rotatably installed between the supporting round rod (1041) and the connecting bushing (1042). The surface of the supporting round rod (1041) and the end away from the right-angled frame (101) are in contact with the inner side of the connecting bushing (1042).

5. The adjustable-angle gas meter sealing performance testing and positioning fixture according to claim 3, characterized in that: The slotted hole (1043) is arc-shaped, and the locking screw (1044) passes through the center of the slotted hole (1043). The external thread on the surface of the locking screw (1044) is threadedly installed between the end of the support rod (1041) away from the right-angled frame (101).

6. The adjustable-angle gas meter sealing performance testing and positioning fixture according to claim 1, characterized in that: The annular hanging piece (201) is installed directly above the annular guide rail groove (103). The internal threaded hole (203) and the circular hole (102) are concentric circles. The inner diameter of the internal threaded hole (203) is smaller than the inner diameter of the circular hole (102). The limiting plate (204) is arc-shaped, and the center of the limiting plate (204) coincides with the central axis of the annular hanging piece (201).

7. The adjustable-angle gas meter sealing performance testing and positioning fixture according to claim 1, characterized in that: The connecting teeth (202) are installed vertically, and there are four connecting teeth (202), which are evenly distributed on the bottom of the annular hanging piece (201).

8. The adjustable-angle gas meter sealing performance testing and positioning fixture according to claim 1, characterized in that: The auxiliary component (3) includes a connecting bracket (301) and a wedge seat (302). The top of the connecting bracket (301) is detachably fixedly installed on the side of the bottom of the right-angled frame (101). A straight hole (303) is opened in the middle of the inside of the wedge seat (302). The bottom of the connecting bracket (301) passes through the inside of the straight hole (303). The wedge seat (302) is slidably installed between the bottom of the connecting bracket (301) and the bottom of the connecting bracket (301) through the straight hole (303). A reset elastic strip (304) is fixedly installed between the side of the bottom of the connecting bracket (301) and the inner wall of the straight hole (303). A right-angle clamping plate (305) is fixedly connected to the surface of the wedge seat (302) and the end away from the connecting bracket (301). A material clamping port (306) is opened in the middle of the surface of the right-angle clamping plate (305).

9. The adjustable-angle gas meter sealing performance testing and positioning fixture according to claim 8, characterized in that: The wedge-shaped seat (302) is installed directly below the bottom side of the right-angled frame (101). The outer slope of the wedge-shaped seat (302) is in contact with the bend at the bottom of the right-angled frame (101). The end of the right-angled plate (305) away from the wedge-shaped seat (302) is in contact with the bottom of the right-angled frame (101).

10. The adjustable-angle gas meter sealing performance testing and positioning fixture according to claim 8, characterized in that: The reset elastic strip (304) is arc-shaped, and the material clamping port (306) is located directly below the circular hole (102).

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