A pre-installation structure for membrane and core membrane box of a membrane gas meter

Abstract

The present invention provides a pre-installation structure of a membrane and a core membrane box of a diaphragm gas meter, comprising a diaphragm and a shell, wherein the shell has an installation port for installing the diaphragm, a fixing plate is installed on the side of the diaphragm away from the shell, a clamping assembly is arranged between the fixing plate and the shell, the clamping assembly fixes the fixing plate and the shell, a locking assembly is fixedly arranged on the clamping part, the locking assembly locks the clamping assembly, the clamping assembly comprises a clamping block and a clamping slot, the clamping block is fixedly arranged on the outer edge of the fixing plate, a bulge is formed on the surface of the clamping block along the thickness direction of the fixing plate, the clamping slot is opened in the shell at the installation port, the clamping slot comprises an entry portion and a clamping portion, the entry portion is connected with the clamping portion, the entry portion is arranged along the thickness direction of the shell, the clamping portion is arranged parallel to the installation port, and the clamping block and the clamping slot are clamped to open or close the fixing plate and the shell. The present invention has the effects of simple installation, convenient replacement of the membrane, and the shell can be reused.

Description

Technical Field

[0001] The invention relates to the technical field of gas meters, and in particular to a pre-installation structure of a membrane and a core membrane box of a membrane type gas meter. Background Art

[0002] The diaphragm gas meter is a widely used gas meter with the advantages of high measurement accuracy, wide range, stable performance, easy process control, high cost performance, etc. There are four metering chambers in the diaphragm gas meter. The gas meter is provided with a center wheel that rotates under the push of the diaphragm, and a valve seat and a valve cover for distributing gas. The valve cover and the center wheel are connected by a connecting rod mechanism. When the center wheel rotates, it drives the valve cover to move on the valve seat, thereby controlling the inflation and exhaust of each metering chamber in turn. The material of the membrane is very easy to be damaged during use. In the prior art, the membrane of the diaphragm gas meter and the movement membrane box are mainly fixed by welding and other methods. When the membrane is damaged, it is particularly difficult to replace the membrane, and the shell must be replaced and then the corresponding welding must be performed. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a pre-installed structure of the diaphragm and the core diaphragm box of a diaphragm gas meter, which has the advantages of simple installation, convenient replacement of the diaphragm, and repeated use of the shell.

[0004] The above-mentioned invention object of the present invention is achieved through the following technical scheme: a pre-installation structure of the membrane and the movement membrane box of a diaphragm gas meter, including a diaphragm and a shell, the shell has an installation port for installing the diaphragm, a fixing plate is installed on the side of the diaphragm away from the shell, a clamping assembly is arranged between the fixing plate and the shell, the clamping assembly fixes the fixing plate and the shell, a locking assembly is fixedly arranged on the clamping part, the locking assembly locks the clamping assembly, the clamping assembly includes a clamping block and a clamping groove, the clamping block is fixedly arranged on the fixing plate The outer edge of the plate, the surface of the card block forms a protrusion along the thickness direction of the fixed plate, the card slot is opened in the shell at the installation port, the card slot includes an entry part and a clamping part, the entry part is connected to the clamping part, the entry part is arranged along the thickness direction of the shell, the clamping part is arranged parallel to the installation port, the card block enters along the entry part, rotates to the clamping part for clamping and fixing, the clamping part and the protrusion are provided with grooves at the corresponding positions, the protrusion is clamped with the groove, and the card block and the card slot are clamped to open or close the fixed plate and the shell.

[0005] Preferably, the locking assembly includes a resistance rod, a linkage rod, and a locking rod, the resistance rod and the locking rod are respectively arranged at two ends of the linkage rod, a rotating hole is provided at an upper position of the center of gravity of the resistance rod, a rotating column is provided at the rotating hole of the shell and is rotatably matched with the rotating hole, the linkage rod moves back and forth in the horizontal direction, a steering member is provided between the linkage rod and the locking rod, and the steering member converts the lateral movement of the linkage rod into the longitudinal movement of the locking rod.

[0006] Furthermore, the steering member includes a gear disposed between the linkage rod and the locking rod, and linkage teeth rotatably matched with the gear are disposed on one side of the linkage rod and the locking rod close to the gear.

[0007] Preferably, a reset member is provided in the locking assembly, and the reset member includes a reset column and a slide groove. The slide groove is provided along the length direction of the linkage rod, and the reset column reciprocates along the slide groove. A reset groove is provided at the corresponding position of the shell, and the reset column extends out of the reset groove and slides along the reset groove. The reset column drives the linkage teeth of the linkage rod to engage and disengage with the gear. A spring is provided on the lock rod, and the spring can reset the position of the lock rod.

[0008] Preferably, a return spring is arranged in the slide groove, one end of the return spring is fixedly connected to the top of the slide groove, and the other end of the return spring is fixedly connected to the return column.

[0009] Preferably, a flexible connector is provided between the interference rod and the linkage rod, one end of the flexible connector is fixedly connected to the interference rod, and the other end of the flexible connector is fixedly connected to the linkage rod.

[0010] Furthermore, the flexible connecting member is a rubber plate.

[0011] In summary, the present invention includes at least one of the following beneficial technical effects:

[0012] 1. By setting a clamping assembly between the fixed plate and the shell, the membrane is detachably fixed on the shell, the clamping block enters along the entry part and rotates to the clamping part to be clamped and fixed, so as to realize the first locking of the fixed plate, and the groove and the protrusion on the inner wall of the clamping part are clamped to perform the second locking, the clamping block pushes the contact rod to move forward, the contact rod pushes the linkage rod to translate, the linkage teeth on the linkage rod drive the gear to rotate, the gear drives the locking rod to enter the clamping part, and the clamping block is locked for the third time, which can fix the clamping block in the clamping part to prevent the clamping block from falling off from the card slot due to mechanical vibration during operation.

[0013] 2. The cooperation between the reset column, the slide groove and the reset groove inside the reset member, as well as the reset spring arranged on the lock rod, has a simple structure and is convenient for replacing the membrane. The reset column is moved along the reset groove to separate the gear from the linkage tooth on the linkage rod. The reset spring on the lock rod prompts the lock rod to return to its initial position. The fixed plate is rotated to move the clamping block along the clamping part to the entry part and then taken out from the entry part to replace the membrane. The operation is simple and it is more convenient to replace the membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present invention;

[0015] Figure 2 is a cross-sectional view of the present invention;

[0016] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0017] Reference numerals:

[0018] 1. Shell; 21. Mounting port; 3. Fixing plate; 4. Clamping assembly; 41. Block; 41a. Protrusion; 41b. Groove; 42. Clamping slot; 42a. Entry portion; 42b. Clamping portion; 5. Locking assembly; 51. Resistance rod; 52. Linking rod; 53. Locking rod; 53a. Spring; 6. Rubber sheet; 7. Rotating hole; 7a. Rotating column; 81. Gear; 82. Linking tooth; 9. Reset member; 91. Reset column; 92. Slide; 92a. Reset spring; 93. Reset groove. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0020] Unless otherwise defined, the technical terms or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which this application belongs. The words "one" or "an" and the like used in the patent application specification and claims of this application do not indicate a quantity limitation, but indicate the existence of at least one.

[0021] In the description of the specification and claims of this application, the terms "upper", "lower", "horizontal", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present application.

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0023] Figure 1 A specific embodiment of the pre-installation structure of the membrane and the core membrane box of the membrane gas meter in the present application is shown.

[0024] The pre-installed structure of the diaphragm and the movement diaphragm box of the diaphragm gas meter includes a diaphragm and a shell 1. The shell 1 has an installation port 21 for installing the diaphragm. A fixing plate 3 is installed on the side of the diaphragm away from the shell 1. The fixing plate 3 is annular and made of a steel alloy. A clamping assembly 4 is provided between the fixing plate 3 and the shell 1 to fix the fixing plate 3 and the shell 1.

[0025] The clamping assembly 4 includes a clamping block 41 and a clamping slot 42. The clamping block 41 is fixedly arranged at the outer edge of the fixing plate 3. Preferably, the clamping block 41 is arranged in an integral molding manner, and the overall structural strength is stronger. A protrusion 41a is formed on the surface of the clamping block 41 along the thickness direction of the fixing plate 3. The number of the protrusion 41a is at least one. A groove 41b that is engaged with the protrusion 41a is arranged at a corresponding position in the clamping slot 42. The clamping slot 42 is opened at the installation opening 21 of the housing 1. The clamping slot 42 includes an entry portion 42a and a clamping portion 42b. The entry portion 42a is connected to the clamping portion 42b. The entry portion 42a is arranged along the thickness direction of the housing 1. The clamping portion 42b is arranged parallel to the installation opening 21. The two are connected in an L-shaped arrangement. The clamping block 41 enters along the entry portion 42a and then rotates to the clamping portion 42b for clamping and fixing. The groove 41b is arranged at the clamping portion 42b, and the protrusion 41a is engaged with the groove 41b.

[0026] The housing 1 is provided with a locking assembly 5 at the clamping assembly 4 , and the locking assembly 5 locks the clamping assembly 4 to fix the clamping assembly 4 , in order to lock the clamping assembly 4 again.

[0027] In this embodiment, a connecting rod mechanism is adopted, and the locking of the clamping assembly 4 is realized through the linkage system between the connecting rods. The locking assembly 5 includes a resisting rod 51, a linkage rod 52, and a locking rod 53. The resisting rod 51 and the locking rod 53 are respectively arranged at the two ends of the linkage rod 52. The resisting rod 51 and the linkage rod 52 are movably connected.

[0028] In this embodiment, a flexible connecting plate is used to connect the abutment rod 51 and the linkage rod. Preferably, a rubber plate 6 is used in consideration of cost. One end of the rubber plate 6 is fixedly connected to the linkage rod 52 , and the other end is fixedly connected to the abutment rod 51 .

[0029] A rotating hole 7 is provided at the upper position of the center of gravity of the resistance rod 51, and a rotating column 7a which rotates with the rotating hole 7 is provided at the housing 1. When the resistance rod 51 is squeezed by the block 41, the resistance rod 51 rotates, so that the end of the resistance rod 51 away from the block 41 pushes the linkage rod 52 to move in the horizontal direction.

[0030] A steering member is provided between the linkage rod 52 and the locking rod 53. The steering member converts the lateral movement of the linkage rod 52 into the longitudinal movement of the locking rod 53, so that the end of the locking rod 53 away from the rotating member moves downward and extends into the clamping portion 42b to abut against the end of the clamping block 41 away from the abutting rod 51, thereby preventing the clamping block 41 from accidentally falling off from the clamping portion 42b and causing the membrane to fall off.

[0031] In this embodiment, the steering member includes a gear 81 arranged between the linkage rod 52 and the locking rod 53. A linkage tooth 82 that rotates with the gear 81 is arranged on the side of the linkage rod 52 close to the gear 81. The locking rod 53 is arranged on the side of the gear 81 close to the entry portion 42a, and a linkage tooth 82 is arranged on the side of the locking rod 53 close to the gear 81. When the linkage rod 52 moves from right to left, it drives the gear 81 to rotate counterclockwise, and the gear 81 drives the locking rod 53 to move downward. When the lower end of the locking rod 53 extends into the clamping portion 42b, the locking rod 53 positions the lateral position of the clamping block 41.

[0032] In this embodiment, in order to achieve the free closing of the locking assembly 5, a reset member 9 is provided in the locking assembly 5, and the reset member 9 includes a reset column 91 and a slide groove 92. The slide groove 92 is arranged along the length direction of the linkage rod 52. When the linkage rod moves, the reset column 91 reciprocates along the slide groove 92. A reset groove 93 is provided at the corresponding position of the shell 1. The reset column 91 extends out of the reset groove 93, and the reset column 91 slides along the reset groove 93. When it is necessary to reset the locking rod 53, the reset column 91 moves upward, driving the linkage tooth 82 of the linkage rod 52 to separate from the gear 81. A spring 53a is provided on the locking rod 53. The spring 53a can reset the position of the locking rod 53, so that the locking rod 53 is retracted from the clamping portion 42b. At this time, the fixed plate 3 is rotated to remove the clamping block 41 from the clamping portion 42b through the entry portion 42a.

[0033] A return spring 92a is provided in the slide groove 92, one end of the return spring 92a is fixedly connected to the top of the slide groove 92, and the other end is fixedly connected to the return column 91. The return column 91 is moved along the return groove 93 to separate the gear 81 from the linkage tooth 82 on the linkage rod 52. When the gear 81 needs to be meshed with the linkage tooth 82 on the linkage rod 52, the return column 91 is released to move the return column 91 downward along the slide groove 92, driving the linkage rod 52 to move downward, so that the linkage tooth 82 on the linkage rod engages with the gear 81.

[0034] When in use, the membrane is installed on the installation opening 21 of the shell 1, and then the fixing plate 3 is placed on the membrane, so that the block 41 on the fixing plate 3 is aligned with the entrance of the slot 42. When the block 41 enters the bottom of the entrance part, the fixing plate 3 is rotated to make the block 41 enter the clamping part 42b. When the block 41 abuts against the abutting rod 51, the fixing plate 3 is continued to be rotated. When the protrusion 41a is clamped with the groove 41b, the abutting rod 51 also passes through the linkage rod 52 to make the locking rod 53 extend into the clamping part 42b, so as to realize the secondary locking of the block 41. When disassembling, the reset column 91 is moved along the reset column 91 to reset the lock rod 53. The positioning slot 93 moves upward, and the reset spring 92a located on the locking rod 53 returns the locking rod 53 to the initial position. At this time, the center of gravity of the contact rod 51 is located below the rotating part. Due to gravity, the contact rod 51 rotates clockwise to reset the contact rod 51. The contact rod 51 drives the linkage rod to move rightward through the rubber plate 6 to reset the linkage rod. At this time, the reset column 91 is released, and the spring 53a located on the reset column 91 resets the reset column 91 downward, so that the linkage tooth 82 on the linkage rod 52 meshes with the gear 81, thereby realizing the reset work between the various mechanisms.

[0035] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pre-installed structure of a membrane and a core membrane box of a diaphragm gas meter, comprising a diaphragm and a housing, wherein the housing has an installation opening for installing the diaphragm, characterized in that: A fixing plate is installed on the side of the diaphragm facing away from the shell, and a clamping component is provided between the fixing plate and the shell, and the fixing plate is fixedly matched with the shell, and a locking component is fixedly provided on the fixing component, and the locking component locks the fixing component, and the fixing component includes a clamping block and a clamping groove, and the clamping block is fixedly arranged on the outer edge of the fixing plate, and a protrusion is formed on the surface of the clamping block along the thickness direction of the fixing plate, and the clamping groove is opened at the shell at the installation opening, and the clamping groove includes an entry portion and a clamping portion, and the entry portion is communicated with the clamping portion, and the entry portion is arranged along the thickness direction of the shell, and the clamping portion is arranged parallel to the installation opening, and the clamping block enters along the entry portion and is rotated to the clamping portion for clamping and fixing, and a groove is provided at the corresponding position of the clamping portion and the protrusion, and the protrusion is clamped and matched with the groove, and the clamping block and the clamping groove are clamped and matched to open or close the fixing plate and the shell; The locking assembly comprises a resisting rod, a linkage rod and a locking rod, wherein the resisting rod and the locking rod are respectively arranged at two ends of the linkage rod, a rotating hole is arranged at a position above the center of gravity of the resisting rod, a rotating column which is rotatably matched with the rotating hole is arranged at the rotating hole of the housing, the linkage rod reciprocates in the horizontal direction, a steering member is arranged between the linkage rod and the locking rod, and the steering member converts the lateral movement of the linkage rod into the longitudinal movement of the locking rod; When the card block enters the bottom of the entry part, the fixed plate is rotated to make the card block enter the clamping part. When the card block contacts the abutment rod, the fixed plate is continued to be rotated. When the protrusion is engaged with the groove, the abutment rod also passes through the linkage rod to make the locking rod extend into the clamping part, thereby realizing secondary locking of the card block.

2. The pre-installation structure of the membrane and the core membrane box of the diaphragm gas meter according to claim 1 is characterized in that: The steering member comprises a gear arranged between the linkage rod and the locking rod, and linkage teeth rotatably matched with the gear are arranged on one side of the linkage rod and the locking rod close to the gear.

3. The pre-installation structure of the membrane and the core membrane box of the diaphragm gas meter according to any one of claim 2, characterized in that: A reset member is provided in the locking assembly, and the reset member includes a reset column and a slide groove. The slide groove is provided along the length direction of the linkage rod, and the reset column reciprocates along the slide groove. A reset groove is provided at the corresponding position of the shell, and the reset column extends out of the reset groove and slides along the reset groove. The reset column drives the linkage teeth of the linkage rod to engage and disengage with the gear. A spring is provided on the lock rod, and the spring can reset the position of the lock rod.

4. The pre-installation structure of the membrane and the core membrane box of the diaphragm gas meter according to claim 3 is characterized in that: A return spring is arranged in the slide slot, one end of the return spring is fixedly connected to the top of the slide slot, and the other end of the return spring is fixedly connected to the return column.

5. The pre-installation structure of the membrane and the core membrane box of the diaphragm gas meter according to claim 1 is characterized in that: A flexible connector is provided between the abutment rod and the linkage rod, one end of the flexible connector is fixedly connected to the abutment rod, and the other end of the flexible connector is fixedly connected to the linkage rod.

6. The pre-installation structure of the membrane and the core membrane box of the diaphragm gas meter according to claim 5, characterized in that: The flexible connecting piece is a rubber plate.

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