Rubber-lined valve seat bonding and curing structure

Abstract

The utility model discloses a kind of rubber lining valve seat bonding solidification structures of valve, including valve body and rubber lining valve seat, the rubber lining valve seat is set in the valve body, further include telescopic support mechanism, three-way air pipe and vacuum pump, the inner wall of the valve body and the outer wall of rubber lining valve seat are provided with adhesive layer, the valve body is equipped with several installation through holes, each installation through hole is provided with a three-way air pipe, two three-way air pipes between adjacent are connected by pipeline, the pipeline is connected with vacuum pump, the rubber lining valve seat is provided with telescopic support mechanism, the inner wall of the rubber lining valve seat is pressed by telescopic support mechanism, the pipeline is connected with the vacuum pump. The structure has the following beneficial effects: by being equipped with installation through hole on valve body, and by the jacking effect of telescopic support mechanism, thereby realize inside jacking, outside utilize the solidification mode of vacuum pump air exhaust, finally ensure that there is no gas remaining between valve body and rubber lining valve seat after solidification.

Description

Technical Field

[0001] This utility model relates to the field of valve fittings, and in particular to a bonding and curing structure for rubber-lined valve seats. Background Technology

[0002] Rubber-lined valves have a layer of rubber lining, such as EPDM (ethylene propylene diene monomer), FKM (fluororubber), or NBR (nitrile butadiene rubber), on the inner surface of the metal valve body. This lining isolates corrosive media from direct contact with the valve body, making it suitable for highly corrosive media such as acids, alkalis, salts, and seawater. Another, more demanding technology is cold vulcanization bonding. This involves chemically bonding the already vulcanized rubber to the valve body using a special technique. It's ready to use immediately after bonding, and the lining can be treated on-site during application. Maintenance cycles are short, and costs are low. However, this process is susceptible to the performance of the adhesive and the residual air volume between the lining and the valve body. Its reliability and stability are key factors restricting the application and development of this technology. Utility Model Content

[0003] To address the aforementioned problems, this invention proposes a bonding and curing structure for rubber-lined valve seats. By opening an installation through hole in the valve body and utilizing the supporting action of a telescopic support mechanism, a curing method is achieved where the valve body is supported on the inside and a vacuum pump is used to extract air on the outside. This ensures that no gas residue remains between the valve body and the rubber-lined valve seat after curing, and that an adhesive layer can be uniformly formed between the valve body and the rubber-lined valve seat.

[0004] The technical solution adopted by this utility model is as follows:

[0005] A rubber-lined valve seat bonding and curing structure includes a valve body and a rubber-lined valve seat, wherein the rubber-lined valve seat is disposed within the valve body. The structure also includes a telescopic support mechanism, a three-way air pipe, and a vacuum pump. An adhesive layer is disposed between the inner wall of the valve body and the outer wall of the rubber-lined valve seat. The valve body has several mounting holes, each containing a three-way air pipe. Adjacent three-way air pipes are connected by a pipe, which is connected to the vacuum pump. The rubber-lined valve seat contains a telescopic support mechanism that abuts against the inner wall of the rubber-lined valve seat. The pipe is connected to the vacuum pump.

[0006] In this type of adhesive curing structure, adhesive is first applied to the inner wall of the valve body, and then the rubber-lined valve seat is placed inside the valve body, so that the outer wall of the rubber-lined valve seat is tightly attached to the inner wall of the valve body, and the adhesive is located between the valve body and the rubber-lined valve seat. The telescopic support mechanism continuously pushes the rubber-lined valve seat towards the valve body, and the vacuum pump is turned on to evacuate air, thereby creating a certain degree of vacuum between the valve body and the rubber-lined valve seat. The air is then removed from between the valve body and the rubber-lined valve seat by the evacuation action of the three-way air pipe. This process ensures that the adhesive is evenly coated to form an adhesive layer and avoids defects such as local voids, thus ensuring uniform bonding strength in the circumferential direction of the valve inner wall. Moreover, because the air is removed during this process, there is no gas residue, resulting in higher stability after bonding and curing.

[0007] In summary, this type of adhesive curing structure achieves curing by opening mounting through holes in the valve body and using the supporting effect of the telescopic support mechanism, thereby achieving curing by supporting from the inside and using a vacuum pump to extract air from the outside. This ensures that there is no gas residue between the valve body and the rubber-lined valve seat after curing, and that an adhesive layer can be uniformly formed between the valve body and the rubber-lined valve seat.

[0008] Optionally, the telescopic support mechanism includes a base, an adjusting screw, and a contouring pressure plate. The contouring pressure plate is arc-shaped. One end of the adjusting screw is engaged with the base, and the contouring pressure plate is located at the other end of the adjusting screw. The contouring pressure plate is pressed against the inner wall of the rubber-lined valve seat.

[0009] The function of the adjusting screw is to adjust the supporting strength of the profiled pressure plate on the rubber-lined valve seat.

[0010] Optionally, a locking nut is provided on the adjusting screw, and the locking nut is pressed against the outer wall of the base.

[0011] The locking nut is used to adjust the extension and retraction of the adjusting screw relative to the base, thereby creating different levels of support for the rubber-lined valve seat. Specifically, the adjusting screw has an adjusting hole on its rod wall.

[0012] Optionally, the base is a circular base with a mounting hole, one end of the adjusting screw is slidably engaged with the mounting hole, and a suspension screw hole is provided on the base.

[0013] The suspension screw holes facilitate suspension. The base also has sliding positioning holes.

[0014] Optionally, the adjusting screws are distributed equidistantly and with equal arc around the base, and the distance between two adjacent adjusting screws is equal.

[0015] The adjusting screws are evenly distributed on the base so that the rubber-lined valve seat can be evenly pushed against the valve body in all directions.

[0016] Optionally, a sealing plate is provided on the mounting hole of the valve body.

[0017] Optionally, a pressure gauge is connected to the pipeline.

[0018] The pressure gauge is used to monitor the vacuum level between the valve body and the rubber-lined valve seat.

[0019] Optionally, the pipe is a flexible pipe, and a needle valve is installed on the pipe.

[0020] The vacuum pump is always in a negative pressure state. After the vacuum level reaches the specified standard, the needle valve can be closed. When the vacuum level is insufficient, it can be restarted. This cycle is repeated until the adhesive is completely cured.

[0021] The beneficial effects of this utility model are: by opening an installation through hole on the valve body and by using the supporting effect of the telescopic support mechanism, the curing method of supporting on the inside and using a vacuum pump to extract air on the outside is achieved, which ultimately ensures that there is no gas residue between the valve body and the rubber-lined valve seat after curing, and that an adhesive layer can be uniformly formed between the valve body and the rubber-lined valve seat. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a simplified schematic diagram of the bonding and curing structure of a rubber-lined valve seat.

[0024] The figures in the diagram are labeled as follows: 1. Valve body; 2. Rubber-lined valve seat; 3. Adhesive layer; 4. T-junction pipe; 5. Pipe; 6. Sealing plate; 7. Telescopic screw; 8. Contouring pressure plate; 9. Base; 10. Locking nut; 11. Suspension screw hole; 12. Sliding positioning hole; 13. Adjustment hole; 14. Pressure gauge; 15. Needle valve; 16. Vacuum pump. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0028] As attached Figure 1 As shown, a rubber-lined valve seat bonding and curing structure includes a valve body 1 and a rubber-lined valve seat 2. The rubber-lined valve seat 2 is disposed inside the valve body 1. It also includes a telescopic support mechanism, a three-way air pipe, and a vacuum pump 16. An adhesive layer 3 is disposed between the inner wall of the valve body 1 and the outer wall of the rubber-lined valve seat 2. Several mounting through holes are opened on the valve body 1. A three-way air pipe is disposed in each mounting through hole. Two adjacent three-way air pipes are connected by a pipe 5. The pipe 5 is connected to the vacuum pump 16. A telescopic support mechanism is disposed inside the rubber-lined valve seat 2. The telescopic support mechanism abuts against the inner wall of the rubber-lined valve seat 2. The pipe 5 is connected to the vacuum pump 16.

[0029] In this type of adhesive curing structure, adhesive is first applied to the inner wall of the valve body 1, and then the rubber-lined valve seat 2 is placed inside the valve body 1, so that the outer wall of the rubber-lined valve seat 2 is tightly attached to the inner wall of the valve body 1, and the adhesive is located between the valve body 1 and the rubber-lined valve seat 2. The telescopic support mechanism continuously pushes the rubber-lined valve seat 2 towards the valve body 1, and the vacuum pump 16 is turned on to evacuate air, thereby creating a certain degree of vacuum between the valve body 1 and the rubber-lined valve seat 2. The air is then removed from between the valve body 1 and the rubber-lined valve seat 2 by the evacuation action of the three-way air pipe. This process ensures that the adhesive is evenly coated to form an adhesive layer 3, preventing local voids and ensuring uniform bonding strength in the circumferential direction of the valve's inner wall. Furthermore, because the evacuation action removes the gas, there is no gas residue, resulting in higher stability after bonding and curing.

[0030] In summary, in this type of adhesive curing structure, by opening an installation through hole on the valve body 1 and by using the supporting effect of the telescopic support mechanism, a curing method is achieved by supporting from the inside and using the vacuum pump 16 to extract air from the outside. This ensures that there is no gas residue between the valve body 1 and the rubber-lined valve seat 2 after curing, and that an adhesive layer 3 can be uniformly formed between the valve body 1 and the rubber-lined valve seat 2.

[0031] As attached Figure 1 As shown, the telescopic support mechanism includes a base 9, an adjusting screw, and a contouring pressure plate 8. The contouring pressure plate 8 is arc-shaped. One end of the adjusting screw is engaged with the base 9, and the contouring pressure plate 8 is located at the other end of the adjusting screw. The contouring pressure plate 8 is pressed against the inner wall of the rubber-lined valve seat 2.

[0032] The function of the adjusting screw is to adjust the supporting strength of the profiled pressure plate 8 on the rubber-lined valve seat 2.

[0033] As attached Figure 1 As shown, a locking nut 10 is provided on the adjusting screw, and the locking nut 10 is close to the outer wall of the base 9.

[0034] The locking nut 10 is used to adjust the extension and retraction of the adjusting screw relative to the base 9, thereby creating different support strengths for the rubber-lined valve seat 2. Specifically, the adjusting screw has an adjusting hole 13 on its rod wall.

[0035] As attached Figure 1 As shown, the base 9 is a circular base 9, and the base 9 is provided with a mounting hole. One end of the adjusting screw is slidably engaged with the mounting hole. The base 9 is provided with a suspension screw hole 11.

[0036] The suspension screw hole 11 is for easy suspension. The base 9 is also provided with a sliding positioning hole 12.

[0037] As attached Figure 1 As shown, the adjusting screws are distributed at equal intervals and with equal arcs around the base 9, and the distance between two adjacent adjusting screws is equal.

[0038] The adjusting screws are evenly distributed on the base 9 so that the rubber-lined valve seat 2 can be evenly pushed against the valve body 1 in all directions.

[0039] As attached Figure 1 As shown, a sealing plate 6 is provided on the mounting hole of the valve body 1.

[0040] As attached Figure 1 As shown, pressure gauge 14 is connected to pipe 5.

[0041] Pressure gauge 14 is used to monitor the vacuum level between valve body 1 and rubber-lined valve seat 2.

[0042] As attached Figure 1 As shown, pipe 5 is a flexible pipe 5, and a needle valve 15 is installed on pipe 5.

[0043] The vacuum pump 16 is always in a negative pressure state. After the vacuum degree reaches the specified standard, the needle valve 15 can be closed. When the vacuum degree is insufficient, it can be restarted. The cycle repeats until the adhesive is completely cured.

[0044] The above-described embodiments only illustrate some aspects of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rubber-lined valve seat bonding and curing structure, comprising a valve body and a rubber-lined valve seat, wherein the rubber-lined valve seat is disposed within the valve body, characterized in that, It also includes a telescopic support mechanism, a three-way air pipe, and a vacuum pump. An adhesive layer is provided between the inner wall of the valve body and the outer wall of the rubber-lined valve seat. Several mounting through holes are provided on the valve body, and a three-way air pipe is provided in each mounting through hole. Two adjacent three-way air pipes are connected by a pipe, which is connected to the vacuum pump. A telescopic support mechanism is provided inside the rubber-lined valve seat. The telescopic support mechanism abuts against the inner wall of the rubber-lined valve seat, and the pipe is connected to the vacuum pump.

2. The adhesive bonding and curing structure for a rubber-lined valve seat according to claim 1, characterized in that, The telescopic support mechanism includes a base, an adjusting screw, and a contouring pressure plate. The contouring pressure plate is arc-shaped. One end of the adjusting screw is engaged with the base, and the contouring pressure plate is located at the other end of the adjusting screw. The contouring pressure plate is pressed against the inner wall of the rubber-lined valve seat.

3. The adhesive bonding and curing structure for a rubber-lined valve seat according to claim 2, characterized in that, A locking nut is provided on the adjusting screw, and the locking nut is pressed against the outer wall of the base.

4. The adhesive bonding and curing structure for a rubber-lined valve seat according to claim 2, characterized in that, The base is circular and has mounting holes. One end of the adjusting screw is slidably engaged with the mounting holes, and the base has suspension screw holes.

5. The adhesive bonding and curing structure for a rubber-lined valve seat according to claim 2, characterized in that, The adjusting screws are distributed at equal intervals and with equal arcs around the base, and the distance between two adjacent adjusting screws is equal.

6. The adhesive bonding and curing structure for a rubber-lined valve seat according to claim 1, characterized in that, A sealing plate is provided on the mounting hole of the valve body.

7. The adhesive bonding and curing structure for a rubber-lined valve seat according to claim 1, characterized in that, A pressure gauge is connected to the pipeline.

8. The adhesive bonding and curing structure for a rubber-lined valve seat according to claim 1, characterized in that, The pipe is a flexible pipe, and a needle valve is installed on the pipe.

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