A jig for mounting a diaphragm

Abstract

This utility model relates to the field of diaphragm installation technology, specifically to a clamp for diaphragm installation, including a valve body with an installation groove at its upper end, and multiple connecting ears fixedly arranged in a circular array on the outer side of the valve body. Each connecting ear has a pin hole, and a positioning ring is provided on the upper part of the valve body. This utility model uses a square insert at the lower end of the positioning ring for connection. Through the cooperation of a limiting block and a limiting spring, the insert automatically pops out after being inserted into the pin hole and abuts against the lower side of the connecting ear, ensuring the positional stability of the positioning ring from both axial and radial directions. This solves the problem of slight wobbling of the positioning ring caused by the gap between the positioning pin and the pin hole in the prior art. The beveled edge design at the lower end of the limiting block allows the insert to automatically retract during insertion, further improving the ease of installation and ensuring the stability of the positioning ring and guide ring during guidance, thus guaranteeing consistent product quality.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm installation technology, specifically to a clamp for diaphragm installation. Background Technology

[0002] In the assembly process of fluid control equipment, the diaphragm, as the core sealing element and power transmission component, directly affects the sealing performance, operational stability and service life of the equipment due to its installation accuracy. Since the diaphragm is usually made of rubber, plastic or composite materials, it is soft and easily deformable. When assembling with components such as valve body and valve cover, special fixtures are required to accurately position and reliably fix it to ensure that the edge or sealing surface of the diaphragm can be completely fitted with the corresponding assembly surface, so as to avoid sealing failure caused by misalignment, wrinkles or uneven force. Currently, there are various installation fixtures for diaphragms in the industry. Among them, prior art document CN216681994U discloses a fixture for installing diaphragms. Its core design includes a positioning ring and a positioning pin. The positioning ring is used to fit and limit the diaphragm, and the positioning pin is fixed at the bottom of the positioning ring. By inserting the positioning pin into a pre-set pin hole in the valve body, the positioning ring and the valve body are relatively fixed. This structure attempts to simplify the installation process through the cooperation of the positioning pin and the pin hole, but it has significant limitations in practical applications. Specifically, the positioning method of the comparative document relies on the rigid fit between the positioning pin and the valve body pin hole. This single positioning pin insertion structure has the following problems: there are inevitably machining tolerances and fit clearances between the positioning pin and the pin hole, and there are no limiting components. During assembly, pressing, collision, or the tension of the diaphragm itself can easily cause the positioning ring to wobble slightly in the radial direction, causing the diaphragm to shift in position within the positioning ring. This results in uneven local stress on the diaphragm, causing wrinkles, curling, and other phenomena, which seriously affect the sealing effect when tightening the bolts and make it difficult to ensure the consistency of product quality. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a diaphragm installation fixture, which can effectively solve the problem that the positioning pin and the pin hole inevitably have machining tolerances and fitting clearances, and that the positioning ring is prone to radial slight wobbling due to pressing, collision or the tension of the diaphragm itself during assembly.

[0004] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a clamp for installing a diaphragm sheet, including a valve body, the upper end of which is provided with an installation groove, and a plurality of connecting ears fixedly arranged in a ring array on the outer side of the valve body. Each connecting ear has a pin hole. A positioning ring is provided above the valve body, and a plurality of inserts with the same number of connecting ears are arranged in a ring array at the lower end of the positioning ring. The plurality of inserts correspond one-to-one with the vertical position of the connecting ears, wherein two of the inserts are provided with limit components. The limiting component includes a sliding cavity formed within the insert block, the sliding cavity being slidably connected to a limiting block, and a plurality of limiting springs being fixedly connected between the limiting block and the sliding cavity.

[0005] According to the above-mentioned diaphragm mounting fixture, an auxiliary component is further provided between the valve body and the positioning ring. The auxiliary component includes a lifting groove opened at the upper end of the valve body. An elastic ring is slidably connected to the lifting groove, and a plurality of return springs are fixedly connected in a ring array between the elastic ring and the lifting groove.

[0006] According to the above-mentioned diaphragm mounting fixture, each of the pin holes is square in shape, and the shape of the insert block is adapted to the shape of the pin hole.

[0007] According to the above-mentioned clamp for installing a diaphragm, when the insert block is inserted into the pin hole and the limiting block abuts against the lower side of the connecting ear, the return spring is in a compressed state and is never in a state of extreme compression.

[0008] According to the above-mentioned diaphragm mounting fixture, a guide ring is fixedly connected to the inner side of the positioning ring, and the guide ring is positioned close to the valve body.

[0009] According to the above-mentioned clamp for installing a diaphragm sheet, the lower end of the limiting block is provided with a beveled edge.

[0010] The technical solution provided by this utility model has the following advantages compared with the known prior art: This utility model uses a square insert block at the lower end of the positioning ring for connection. Through the cooperation of the limiting block and the limiting spring, the insert block can automatically pop out after being inserted into the pin hole and abut against the lower side of the connecting ear. This ensures the positional stability of the positioning ring from both axial and radial perspectives, solving the problem of slight wobbling of the positioning ring caused by the gap between the positioning pin and the pin hole in the prior art. The beveled edge design at the lower end of the limiting block allows the insert block to automatically retract during insertion, further improving the ease of installation and ensuring the stability of the positioning ring and guide ring during guidance, thus ensuring consistent product quality. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a first-view structural schematic diagram of the present invention; Figure 2 This is a structural schematic diagram of the present invention from a second perspective; Figure 3 for Figure 1 An enlarged structural diagram of part A in the middle.

[0013] Reference numerals in the attached drawings: 1. Valve body; 2. Mounting groove; 3. Connecting lug; 4. Pin hole; 5. Positioning ring; 6. Guide ring; 7. Insert block; 8. Lifting groove; 9. Elastic ring; 10. Return spring; 11. Sliding cavity; 12. Limiting block; 13. Limiting spring. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0015] The present invention will be further described below with reference to the embodiments.

[0016] Example: Refer to Figures 1 to 3 A diaphragm mounting fixture includes a valve body 1, with a mounting groove 2 at the upper end of the valve body 1. It also includes multiple connecting ears 3 fixedly arranged in a ring array on the outer side of the valve body 1. Each connecting ear 3 has a pin hole 4. A positioning ring 5 is provided above the valve body 1, and a guide ring 6 is provided on the inner side of the positioning ring 5. Under the pressure of the positioning ring 5 and the limiting action of the guide ring 6, the diaphragm is precisely pressed into the mounting groove 2, and the edge is completely fitted with the assembly surface of the valve body 1 without offset or wrinkles.

[0017] The lower end of the positioning ring 5 is provided with a ring array of multiple plugs 7, the same number as the connecting ears 3. Each plug 7 corresponds to a vertical position of the connecting ears 3. Each pin hole 4 is square in shape, and the shape of the plug 7 matches the shape of the pin hole 4, ensuring that the plug 7 will not wobble when inserted into the pin hole 4, thus ensuring the stability of the plug 7.

[0018] Two of the inserts 7 are equipped with limiting components. Specifically, the limiting components include sliding cavities 11 opened in the inserts 7. The sliding cavities 11 are slidably connected to the limiting blocks 12. The lower end of the limiting blocks 12 is provided with beveled edges to facilitate automatic positioning of the limiting blocks 12 and the connecting ears 3, thus simplifying the installation steps.

[0019] Multiple limiting springs 13 are fixedly connected between the limiting block 12 and the sliding cavity 11. Pressing down on the positioning ring 5 causes the insert 7 to gradually insert into the corresponding pin hole 4. Since the shape of the insert 7 is adapted to the square pin hole 4, the two work together to restrict the radial rotation of the positioning ring 5 relative to the valve body 1, ensuring the circumferential position of the positioning ring 5 is stable. During the insertion of the insert 7, the beveled edge at the lower end of the limiting block 12 of the limiting component inside the insert 7 will first contact the upper surface of the connecting ear 3. As the insert 7 continues to move downward, the connecting ear 3 will exert pressure on the limiting block 12. The squeezing force causes the limiting block 12 to compress the limiting spring 13 and retract into the sliding cavity 11 until the limiting block 12 is fully inserted into the sliding cavity 11. At this time, the insert 7 can pass smoothly through the pin hole 4. After the insert 7 is fully inserted into the pin hole 4, the limiting block 12 is no longer squeezed by the connecting ear 3. Under the elastic reset action of the limiting spring 13, the limiting block 12 will pop out from the sliding cavity 11. At this time, the upper end of the limiting block 12 abuts against the lower side of the connecting ear 3, thereby forming an axial limit on the insert 7 and preventing the positioning ring 5 from disengaging from the connecting ear 3 upward.

[0020] The system also includes an auxiliary component positioned between the valve body 1 and the positioning ring 5. This auxiliary component includes a lifting groove 8 at the upper end of the valve body 1, with an elastic ring 9 slidably connected to the lifting groove 8. Multiple return springs 10 are fixedly connected in a ring array between the elastic ring 9 and the lifting groove 8. During the insertion of the insert block 7 and its positioning by the limiting block 12, the lower end of the positioning ring 5 contacts the elastic ring 9 and continuously presses it downwards, causing the elastic ring 9 to slide downwards along the lifting groove 8, thereby compressing the return springs 10. At this time, the return spring 10 is in a compressed state but has not reached its maximum compression state. The elastic force it generates acts upwards on the positioning ring 5. Combined with the contact between the limiting block 12 and the lower side of the connecting ear 3, this ensures a tighter fit between the positioning ring 5 and the connecting ear 3, preventing loosening. It also buffers the impact force during installation, preventing damage to components due to rigid contact.

[0021] In addition, the auxiliary components are designed to facilitate disassembly. When it is necessary to disassemble the positioning ring 5, simply press the limiting block 12 into the sliding cavity 11 to disengage the limiting block 12 from the lower side of the connecting ear 3. At this time, under the elastic action of the return spring 10, the positioning ring 5 will bounce up a certain distance, making it easy for the operator to remove the positioning ring 5 and complete the removal or replacement of the diaphragm.

[0022] The working principle of this utility model is as follows: First, press down on the positioning ring 5 to gradually insert the insert 7 into the corresponding pin hole 4. Since the shape of the insert 7 matches the square pin hole 4, the two work together to restrict the radial rotation of the positioning ring 5 relative to the valve body 1, ensuring the circumferential position of the positioning ring 5 is stable. During the insertion process, the beveled edge at the lower end of the limiting block 12 of the limiting component inside the insert 7 will first contact the upper surface of the connecting ear 3. As the insert 7 continues to move down, the connecting ear 3 will exert a squeezing force on the limiting block 12, causing the limiting block 12 to compress the limiting spring 13 and slide into the sliding cavity. The sliding cavity 11 retracts until the limiting block 12 is fully inserted into the sliding cavity 11. At this time, the insert 7 can pass smoothly through the pin hole 4. After the insert 7 is fully inserted into the pin hole 4, the limiting block 12 is no longer squeezed by the connecting ear 3. Under the elastic reset action of the limiting spring 13, the limiting block 12 will pop out from the sliding cavity 11. At this time, the upper end of the limiting block 12 abuts against the lower side of the connecting ear 3, thereby forming an axial limit on the insert 7 and preventing the positioning ring 5 from disengaging from the connecting ear 3 upwards. This completes the limiting installation of the positioning ring 5 and the guide ring 6 above the mounting groove. When the positioning ring 5 is pressed down, its lower end contacts the elastic ring 9, pushing the elastic ring 9 down along the lifting groove 8 and compressing the return spring 10. The return spring 10 is in a compressed state, and its elastic force acts upward on the positioning ring 5, which balances the downward pressure of the limit block 12, so that the positioning ring 5 and the connecting ear 3 fit tightly together and avoid loosening. Under the pressure of the positioning ring 5 and the limiting action of the guide ring 6, the diaphragm is precisely pressed into the mounting groove 2, and its edge is completely fitted with the assembly surface of the valve body 1 without any offset or wrinkles. Pressing the limiting block 12 causes it to retract into the sliding cavity 11, releasing the axial lock. The elastic force of the return spring 10 pushes the positioning ring 5 upward.

[0023] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A jig for mounting a diaphragm sheet, comprising a valve body (1) provided at an upper end thereof with a mounting groove (2), characterized in that, It also includes multiple connecting ears (3) fixedly arranged in a ring array on the outside of the valve body (1), each of the connecting ears (3) having a pin hole (4), a positioning ring (5) arranged above the valve body (1), and multiple inserts (7) arranged in a ring array at the lower end of the positioning ring (5) in the same number as the connecting ears (3), and the multiple inserts (7) correspond one-to-one with the vertical position of the connecting ears (3), wherein two of the inserts (7) are provided with limit components; The limiting component includes a sliding cavity (11) opened in the insert (7), the sliding cavity (11) is slidably connected to a limiting block (12), and a plurality of limiting springs (13) are fixedly connected between the limiting block (12) and the sliding cavity (11).

2. The diaphragm mounting clamp of claim 1, wherein It also includes an auxiliary component disposed between the valve body (1) and the positioning ring (5). The auxiliary component includes a lifting groove (8) opened at the upper end of the valve body (1). The lifting groove (8) is slidably connected to an elastic ring (9). Multiple return springs (10) are fixedly connected in a ring array between the elastic ring (9) and the lifting groove (8).

3. The diaphragm mounting clamp of claim 2, wherein Each of the pin holes (4) is square in shape, and the shape of the insert (7) is adapted to the shape of the pin hole (4).

4. The diaphragm mounting clamp of claim 3, wherein When the insert (7) is inserted into the pin hole (4) and the limiting block (12) abuts against the lower side of the connecting ear (3), the reset spring (10) is in a compressed state and is never in a state of extreme compression.

5. The diaphragm mounting clamp of claim 1, wherein The inner side of the positioning ring (5) is fixedly connected to a guide ring (6), and the guide ring (6) is located close to the valve body (1).

6. The diaphragm mounting clamp of claim 1, wherein The lower end of the limiting block (12) is provided with a beveled edge.

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