Membrane auxiliary positioning structure for preassembling metering shell

Abstract

The utility model discloses an auxiliary diaphragm positioning structure for preassembling a metering shell, which comprises a guide rod and a rod driving mechanism for driving the guide rod to stretch out and draw back horizontally, and the front end of the guide rod is provided with a guide inclined surface extending to the end part of the guide rod. By the adoption of the scheme, the preassembling device is mainly used for the preassembling procedure of the metering shell, the depth of a diaphragm can be automatically adjusted according to needs, namely, the depth of a diaphragm cavity is adjusted, so that the diaphragm reaches a proper position, the diaphragm is supported in the press-fitting process, and it is guaranteed that the contact position of a sealing ring on the metering shell and the diaphragm is uniform and does not deflect; and the metering shell preassembling efficiency and the product consistency are greatly improved.

Description

Technical Field

[0001] The utility model belongs to the field of gas meter production equipment, and particularly relates to a diaphragm auxiliary positioning structure for pre-assembling a metering housing. Background Technique

[0002] The diaphragm is one of the important components of a diaphragm gas meter. During the use of the gas meter, the pressure of the gas causes the diaphragm assembly to agitate in the diaphragm cavity, thereby driving the rocker arm to move for counting. The existing diaphragm assembly can refer to the patent with the patent number "202223360566.4" and the name: "A diaphragm assembly for a gas meter". The applicant found in the research that the depth of the diaphragm cavity directly affects the metering accuracy, and during the installation of the diaphragm, the initial fixed position of the diaphragm directly affects the volume of the diaphragm cavity. On the other hand, whether the contact area between the diaphragm and the movement body is uniform also directly affects the rotational friction of the rocker arm. Correspondingly, the position of the diaphragm also directly affects the contact sealing quality between the metering housing sealing ring and it, that is, affects the sealing quality of the metering housing. In summary, the position of the diaphragm during the press-fitting of the metering housing plays a crucial role in the assembly process of the gas meter. In the prior art, during the assembly of the metering housing, mostly manual assembly methods are used. The folding plate connected to the rocker arm is lifted manually and then the metering housing is press-fitted, that is, the depth of the diaphragm cavity is adjusted manually, with low efficiency and poor product consistency, seriously affecting the quality of the gas meter. Content of the Utility Model

[0003] In view of this, the utility model provides a diaphragm auxiliary positioning structure for pre-assembling a metering housing to solve the problems in the prior art that when assembling the metering housing, inaccurate diaphragm position increases defective products, or diaphragm positioning leads to low assembly efficiency, poor product consistency and low yield rate of good products.

[0004] The technical solution is as follows:

[0005] A diaphragm auxiliary positioning structure for pre-assembling a metering housing, which is characterized in that: it includes a guide rod and a rod driving mechanism for driving the horizontal expansion and contraction of the guide rod, wherein the front end of the guide rod has a guiding inclined surface extending to its end.

[0006] Adopting the above solution, before pre-pressing the metering housing, first adjust the depth of the diaphragm through the diaphragm positioning structure, that is, adjust the volume of the diaphragm cavity to ensure that the volume of the diaphragm cavity is appropriate, so that the edge of the diaphragm extends evenly outward, and then perform the snap-fit pre-pressing of the metering housing, ensuring the uniformity of the contact position between the sealing ring on the metering housing and the diaphragm, without skew, reducing the mechanical friction caused by the skew of the diaphragm in the later stage, improving the metering accuracy of the diaphragm meter at the same time, and greatly improving the assembly efficiency and product consistency compared with manual adjustment.

[0007] Preferably: at least one horizontal step surface is provided behind the front end of the guide rod on the guiding inclined surface, and the levels of the horizontal step surfaces increase successively. During the pre-installation process, the folding plate for installing the diaphragm is lifted by the horizontal step surfaces. With the above solution, the guiding inclined surface can better ensure that the guide rod extends under the folding plate, while the horizontal step surfaces can better guarantee the levelness when the folding plate is lifted, prevent tilting to one side, further improve the accuracy of diaphragm attitude adjustment, and different step surfaces can adapt to adjustment requirements of different depths, that is, adapt to different diaphragm surface models, relatively expanding its application range.

[0008] Preferably: the guide rod includes a rod main body and a rod head, the rod head is detachably connected to the rod main body, and the guiding inclined surface is located on the rod head. With the above solution, different rod heads can be replaced as needed to adapt to different models of diaphragm meters.

[0009] Preferably: the tail end of the guide rod has a fixed head with a rhombic cross-section, and a connecting screw hole is provided inside the fixed head. With the above solution, it is convenient to quickly connect and fix the guide rod and prevent it from rotating, ensuring its working reliability.

[0010] Preferably: it includes a positioning module base, and a first support and a second support vertically arranged on the positioning module base. The first support and the second support are respectively provided with a first support seat and a second support seat that are vertically slidably matched with each other, and locking structures are both provided;

[0011] The rod driving mechanism is fixedly arranged on the first support seat, a rod front end balance seat is provided on the second support seat, and the guide rod passes through the rod front end balance seat. With the above solution, the working height of the guide rod can be adjusted as needed to adapt to more models of diaphragm meters or installation environments, etc.

[0012] Preferably: a linear bearing is provided at the position where the guide rod passes through the rod front end balance seat. With the above solution, the stability and smoothness of the telescopic movement of the guide rod can be fully guaranteed.

[0013] Preferably: arc-shaped connecting grooves are respectively provided on the first support seat and the second support seat along their thickness directions. With the above solution, the horizontal orientation of the guide rod can be adjusted as needed to adapt to more models of diaphragm meters or installation environments, etc.

[0014] Preferably: the rod driving mechanism is a slide cylinder, and the cylinder slider of the slide cylinder is connected to the guide rod through an adapter block. There is a horizontal lateral displacement adjustment structure between the adapter block and the cylinder slider, and the horizontal lateral displacement direction is perpendicular to the axial direction of the guide rod. With the above solution, translational adjustment can be quickly achieved.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] The diaphragm auxiliary positioning structure for pre-assembling the metering housing provided by the present utility model is mainly used for the pre-assembling process of the metering housing. It can automatically adjust the depth of the diaphragm according to needs, that is, adjust the depth of the diaphragm cavity, so that the diaphragm reaches the appropriate position, support the diaphragm during the pressing process, ensure the uniformity of the contact position between the sealing ring on the metering housing and the diaphragm, and prevent deflection. Compared with the traditional technology, it greatly improves the pre-assembling efficiency of the metering housing and the consistency of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a top view;

[0019] Figure 3 is Figure 1 an axonometric view;

[0020] Figure 4 is a schematic structural diagram of another embodiment of the guide rod;

[0021] Figure 5 is a schematic diagram of the installation and use state of the present utility model;

[0022] Figure 6 is Figure 5 a partial enlarged view of the installation and use of the present utility model in [reference number]. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] Referring to Figures 1 to 6 the diaphragm auxiliary positioning structure for pre-assembling the metering housing shown, which mainly includes a guide rod 710 and a rod driving mechanism 720 for driving the horizontal expansion and contraction of the guide rod 710. The front end of the guide rod 710 has a guiding inclined surface 713 extending to its end. The lowest point of the guiding inclined surface 713 is close to the lowest side of the guide rod 710. During operation, the guide rod 710 can be driven by the rod driving mechanism 720 to extend into the movement body and horizontally lift the diaphragm in the movement body to the designed height (referring to the height of the diaphragm relative to the bottom of the diaphragm cavity after calculation). Specifically, during implementation, it extends into the inner cavity through the window on one side of the movement body. In this embodiment, the rod driving mechanism 720 adopts a slide table cylinder structure.

[0025] In another embodiment, at least one horizontal step surface 714 is provided behind the guiding inclined surface 713 at the front end of the guide rod 710, and the levels of the horizontal step surfaces 714 increase in sequence. When the guide rod 710 extends into the movement body during pre-assembly, the folding plate for installing the diaphragm is lifted by the horizontal step surface 714, and the horizontal step surface 714 can fully ensure the horizontality during lifting.

[0026] Based on the structures of the above two guide rods 710, both can be set as split structures. Specifically, the guide rod 710 can be composed of a rod main body 711 and a rod head 712. The rod head 712 is detachably connected to the rod main body 711, such as by threaded connection or snap connection, etc. The guiding inclined surface 713 and the horizontal step surface 714 are both located on the rod head 712, so that only the rod head can be replaced as needed. The guide rod 710 is generally circular, and the tail end of the rod main body 710 has a fixed head 715 with a rhombus structure, such as a rectangular structure, and has a connecting screw hole.

[0027] In addition, for the convenience of overall disassembly, assembly or maintenance, etc., the diaphragm positioning structure of the present application further includes a positioning module base 730, and a first support 731 and a second support 732 vertically arranged on the positioning module base 730. The first support 731 and the second support 732 are respectively provided with a first support seat 733 and a second support seat 734 that are vertically slidably matched with each other, and locking structures are both provided. As shown in the figure, the first support seat 733 can slide up and down along the first support 731, and the second support seat 734 can slide up and down along the second support 732. A conventional chute structure is adopted, and a strip hole and a hole alignment locking structure are adopted between the two. In this way, the heights of the first support seat 733 and the second support seat 734 can be adjusted as needed and locked to the required height.

[0028] Both the first support seat 733 and the second support seat 734 are generally T-shaped. The rod driving mechanism 720 is fixedly arranged on the first support seat 733. The second support seat 734 has a rod front end balance seat 735. The guide rod 710 passes through the rod front end balance seat 735. A linear bearing 736 is arranged at the position where the guide rod 710 passes through the rod front end balance seat 735.

[0029] In addition, arc-shaped connecting grooves 737 are opened along the thickness direction on both the first support seat 733 and the second support seat 734. As shown in the figure, the corresponding radii of the arc-shaped connecting grooves 737 on the first support seat 733 and the second support seat 734 are the same. Both the bottom of the rod front end balance seat 735 and the bottom of the rod driving mechanism 720 have connecting screw holes arranged corresponding to the arc-shaped connecting grooves 737. In this way, after the connecting bolt passes through the arc-shaped connecting groove 737, the rod front end balance seat 735 can be fixedly connected to the first support seat 733, and the rod driving mechanism 720 and the second support seat 734 can be fixedly connected, and synchronous rotation can be performed when needed to adjust the horizontal orientation of the guide rod.

[0030] In the present application, the rod driving mechanism 720 is preferably a slide cylinder. The cylinder slider of the slide cylinder is connected to the guide rod 710 through an adapter block 740. Among them, there is a horizontal lateral displacement adjustment structure between the adapter block 740 and the cylinder slider, and the horizontal lateral displacement direction is perpendicular to the axial direction of the guide rod 710. Similarly, a strip hole and a hole alignment bolt connection adjustment structure are adopted.

[0031] Reference Figures 1 to 6 The diaphragm auxiliary positioning structure for pre-installing the metering housing shown is mainly used in cooperation with the metering housing online system. As shown in the figure, the metering housing online system includes a movement assembly transport line L and a placement seat N. In this embodiment, the structure of the movement assembly refers to the patent with the patent number "202022713612.9" and the name "A new type of diaphragm gas meter movement structure", and the placement seat can refer to the patent with the patent number "202323087586.3" and the name "A diaphragm processing production line". Among them, a metering housing pre-installation station is set on the movement assembly transport line in its conveying direction. Corresponding to this metering housing pre-installation station, there are a placement seat fixing structure M, a movement body fixing structure, a metering housing grasping and placing mechanism 800, and a metering housing pre-pressing structure. As shown in the figure, the diaphragm positioning structure 700 of the present application is arranged obliquely on one side of the metering housing pre-installation station.

[0032] During the working process, the placement seat N carrying the movement body is conveyed to the metering housing pre-installation station through the movement assembly transport line L. First, the placement seat N is fixed through the placement seat fixing structure M, and then the movement body is fixed through the movement body fixing structure.

[0033] The diaphragm positioning module 700 of the present application works, so that the guide rod 710 extends into it through the window on the side of the movement body, lifts the diaphragm clamping plate to the designed height, ensures that the edge of the diaphragm extends evenly outwards and covers the end face of the movement body. Then, the metering housing is grasped by the metering housing grasping and placing mechanism 800 and buckled onto the movement body. Then, the metering housing pre-pressing structure is used for riveting tooth pre-pressing. After the pre-pressing is completed, the diaphragm positioning module 700 works to make the guide rod 710 retract and reset from the movement body, and the placement seat flows to the next station through the movement assembly transport line L.

[0034] Finally, it should be noted that the above description is only the preferred embodiment of the present utility model. Under the inspiration of the present utility model, those of ordinary skill in the art can make various similar representations without violating the purpose and claims of the present utility model. Such transformations all fall within the protection scope of the present utility model.

Claims

1. A diaphragm auxiliary positioning structure for pre-installation of a metering housing, characterized in that: It includes a guide rod (710) and a rod driving mechanism (720) for driving the horizontal telescopic movement of the guide rod (710), wherein a guiding inclined surface (713) extending to its end is provided at the front end of the guide rod (710).

2. The diaphragm auxiliary positioning structure for pre-installation of a metering housing according to claim 1, characterized in that: At least one horizontal step surface (714) is provided behind the guiding inclined surface (713) at the front end of the guide rod (710), and the levels of the horizontal step surfaces (714) increase in sequence. During the pre-installation process, the folding plate for installing the diaphragm is lifted by the horizontal step surface (714).

3. The diaphragm auxiliary positioning structure for pre-installing a metering housing according to claim 1 or 2, characterized in that: The guide rod (710) includes a rod main body (711) and a rod head (712). The rod head (712) is detachably connected to the rod main body (711), and the guiding inclined surface (713) is located on the rod head (712).

4. The diaphragm auxiliary positioning structure for pre-installation of the metering housing according to claim 1 or 2, characterized in that: A fixing head (715) with a rhombic cross-section is provided at the tail end of the guide rod (710), and a connecting screw hole is provided inside the fixing head (715).

5. The diaphragm auxiliary positioning structure for pre-assembly of the metering housing according to claim 1 or 2, characterized in that: It includes a positioning module base (730), and a first support (731) and a second support (732) vertically arranged on the positioning module base (730). First support seats (733) and second support seats (734) with respective vertical sliding fits are provided on the first support (731) and the second support (732), and locking structures are provided on both of them. The rod driving mechanism (720) is fixedly arranged on the first support seat (733). A rod front end balance seat (735) is provided on the second support seat (734), and the guide rod (710) passes through the rod front end balance seat (735).

6. The diaphragm auxiliary positioning structure for pre-installing a metering housing according to claim 5, characterized in that: A linear bearing (736) is provided at the position where the guide rod (710) passes through the rod front end balance seat (735).

7. The diaphragm auxiliary positioning structure for pre-assembly of the metering housing according to claim 5, characterized in that: Arc-shaped connecting grooves (737) are provided on both the first support seat (733) and the second support seat (734) along their thickness directions.

8. The diaphragm auxiliary positioning structure for pre-installation of the metering housing according to claim 7, characterized in that: The rod driving mechanism (720) is a slide cylinder. The cylinder slider of the slide cylinder is connected to the guide rod (710) through an adapter block (740). A horizontal lateral displacement adjusting structure is provided between the adapter block (740) and the cylinder slider, and the horizontal lateral displacement direction is perpendicular to the axial direction of the guide rod (710).

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