Alarm valve cover pad

Abstract

The utility model relates to the technical field of alarm valves, in particular to an alarm valve cover pad which is characterized by comprising an annular rubber pad body, a plurality of mounting holes are formed in the annular rubber pad body in the circumferential direction of the annular rubber pad body, and a plurality of metal limiting cylinders are fixedly wrapped in the annular rubber pad body. The multiple metal limiting cylinders and the multiple mounting holes are in one-to-one correspondence and are coaxially arranged. An annular groove is formed in the inner peripheral edge of the upper end face of the annular rubber pad body, the upper portion of the annular rubber pad body is made to be in a step shape, and a main annular step sealing face and a secondary annular step sealing face are sequentially formed from inside to outside. The sealing gasket is good in sealing effect, the annular rubber gasket body is not prone to being pressed tightly after being locked and installed, the elastic effect of the sealing gasket is effectively guaranteed, the problem of sealing failure is not prone to occurring, the service life of the sealing gasket is prolonged, and the sealing gasket can be repeatedly used for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of alarm valves, in particular to an alarm valve cover pad. Background Art

[0002] Alarm valves are widely used in various open systems, such as deluge systems, water spray systems and water curtain systems, etc. They are devices used to control water flow and serve as alarms. When the internal pressure of the alarm valve is abnormal, the valve cover can be opened to inspect or repair the inside of the valve body to ensure the accuracy of the alarm valve. In order to ensure the sealing of the connection between the valve cover and the valve body, a sealing gasket is usually provided between the two. However, the sealing gasket installed on the existing alarm valve is usually an ordinary rubber flat gasket. When the valve cover is locked too tightly, the sealing gasket is easily crushed and its elasticity is weakened. After the valve cover is opened many times to inspect or repair the inside of the valve body, the sealing gasket is prone to sealing failure, which shortens the service life of the sealing gasket and makes it impossible to be repeatedly used for a long time, which will increase the subsequent maintenance costs. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an alarm valve cover gasket with good sealing effect. After locking and installation, it is not easy to crush the annular rubber gasket body, effectively ensure its elastic effect, and is not easy to have the problem of sealing failure, which is beneficial to prolonging its service life and can be used repeatedly for a long time.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: an alarm valve cover gasket, including an annular rubber gasket body, a plurality of mounting holes are arranged on the annular rubber gasket body along its circumference, a plurality of metal limit cylinders are fixedly covered in the annular rubber gasket body, the plurality of metal limit cylinders correspond to the plurality of mounting holes one by one and are coaxially arranged, the upper end of the metal limit cylinder extends upward to a position close to the upper end surface of the annular rubber gasket body, the lower end of the metal limit cylinder extends downward to a position close to the lower end surface of the annular rubber gasket body, the upper end surface of the annular rubber gasket body is provided with an annular groove at the inner circumferential edge and the upper part of the annular rubber gasket body is stepped and a primary annular step sealing surface and a secondary annular step sealing surface are sequentially formed from the inside to the outside.

[0005] Furthermore, the annular rubber pad body is in a rectangular frame shape, and the four outer peripheral surfaces of the annular rubber pad body are all arc-shaped surfaces.

[0006] Furthermore, circular reinforcement parts are fixedly provided on the annular rubber pad around the plurality of mounting holes.

[0007] Furthermore, the number of the mounting holes is 4-8.

[0008] Furthermore, a metal connecting rod is fixed between the bottoms of two adjacent metal limiting cylinders, and a plurality of metal limiting cylinders and a plurality of metal connecting rods are spliced ​​in the annular rubber pad to form a metal support skeleton.

[0009] Furthermore, the metal limiting cylinder is a stainless steel limiting cylinder, and the metal connecting rod is a stainless steel connecting rod.

[0010] Furthermore, the annular rubber pad body and the metal support frame are vulcanized and fixed into a whole.

[0011] Furthermore, at least one rubber cloth layer is fixedly provided inside the bottom of the annular rubber pad body.

[0012] Furthermore, the depth of the annular groove is 2-3 mm, and the thickness of the annular rubber pad is 6-10 mm.

[0013] From the above description, it can be known that the alarm valve cover gasket provided by the utility model has the following beneficial effects: the alarm valve cover gasket is installed between the valve cover and the valve body of the alarm valve, and an annular sealing insert matched with the annular groove is fixedly provided on the sealing end face of the valve cover. When installed, after locking the locking bolts between the valve cover and the valve body, the metal limiting cylinder can play a certain limiting role in the locking of the valve cover, so that a contact similar to hard-on-hard contact is generated between the sealing end face of the valve cover and the sub-annular step face of the annular rubber gasket body, and between the lower end face of the annular rubber gasket body and the mounting face of the valve body. The annular sealing block on the valve cover can be embedded in the annular groove and pressed and abutted against the main annular step sealing surface to achieve the main sealing effect without crushing the annular rubber gasket. The most important thing is that the part of the annular rubber gasket in the main annular step sealing surface area will not be crushed, effectively ensuring its elastic effect and effectively protecting the annular rubber gasket. Therefore, after multiple disassembly and assembly, the problem of sealing failure is not likely to occur, which is beneficial to prolonging the service life of the alarm valve cover gasket, can be used repeatedly for a long time, and is beneficial to reducing subsequent maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a three-dimensional structural schematic diagram of an alarm valve cover gasket.

[0015] Figure 2 The utility model is a schematic diagram of the internal structure of an alarm valve cover gasket.

[0016] Figure 3 Schematic diagram of the three-dimensional structure of the metal support frame.

[0017] Figure 4 The utility model is a schematic diagram of the installation state of an alarm valve cover gasket.

[0018] In the figure: 1-annular rubber pad; 11-mounting hole; 12-annular groove; 13-primary annular step sealing surface; 14-secondary annular step sealing surface; 15-arc surface; 16-circular reinforcement portion; 17-rubber sandwich layer; 2-metal support frame; 21-metal limit cylinder; 22-metal connecting rod; 3-valve cover; 31-annular sealing insert; 4-valve body. DETAILED DESCRIPTION

[0019] The present invention is further described below through specific implementation methods.

[0020] like Figures 1 to 4 As shown, an alarm valve cover gasket described in the utility model includes an annular rubber gasket body 1, and a plurality of mounting holes 11 are provided on the annular rubber gasket body 1 along its circumference. A plurality of metal limiting cylinders 21 are fixedly covered inside the annular rubber gasket body 1, and the plurality of metal limiting cylinders 21 correspond to the plurality of mounting holes 11 one by one and are coaxially arranged. The upper end of the metal limiting cylinder 21 extends upward to a position close to the upper end surface of the annular rubber gasket body 1, and the lower end of the metal limiting cylinder 21 extends downward to a position close to the lower end surface of the annular rubber gasket body 1. An annular groove 12 is provided on the inner peripheral edge of the upper end surface of the annular rubber gasket body 1, and the upper part of the annular rubber gasket body 1 is stepped, and a primary annular step sealing surface 13 and a secondary annular step sealing surface 14 are sequentially formed from the inside to the outside.

[0021] The alarm valve cover gasket is installed between the valve cover 3 and the valve body 4 of the alarm valve. An annular sealing insert 31 adapted to the annular groove 12 is fixedly provided on the sealing end surface of the valve cover 3. When installed, after locking the locking bolts between the valve cover 3 and the valve body 4, the setting of the metal limiting cylinder 21 can play a certain limiting role in the locking of the valve cover 3, so that a hard-to-hard contact mode is generated between the sealing end surface of the valve cover 3 and the secondary annular step surface of the annular rubber gasket body 1, and between the lower end surface of the annular rubber gasket body 1 and the mounting surface of the valve body 4, and a secondary sealing effect is achieved. And the annular sealing insert 31 on the valve cover 3 can be embedded in the annular groove 12 and pressed and abutted against the main annular step sealing surface 13 to achieve the main sealing effect, and will not crush the annular rubber gasket 1. The most important thing is that the part of the annular rubber gasket 1 in the area of ​​the main annular step sealing surface 13 will not be crushed, thereby effectively ensuring its elastic effect and being able to effectively protect the annular rubber gasket 1. Therefore, after multiple disassembly and assembly, the problem of sealing failure is not likely to occur, which is beneficial to prolonging the service life of the alarm valve cover gasket, can be used repeatedly for a long time, and is beneficial to reducing subsequent maintenance costs.

[0022] Preferably, the annular rubber pad body 1 is in a rectangular frame shape, and the four outer peripheral surfaces of the annular rubber pad body 1 are all arc-shaped surfaces 15 , so as to better adapt to the shape of the valve cover 3 .

[0023] In addition, circular reinforcement portions 16 are fixedly provided around the multiple mounting holes 11 on the annular rubber pad 1, thereby further enhancing the structural strength around the multiple mounting holes 11 on the annular rubber pad 1 to ensure more stable installation. Preferably, the number of the mounting holes 11 is 4-8.

[0024] In addition, a metal connecting rod 22 is fixed between the bottoms of two adjacent metal limit cylinders 21, and a plurality of the metal limit cylinders 21 and a plurality of the metal connecting rods 22 are spliced ​​in the annular rubber pad 1 to form a metal support skeleton 2, thereby further enhancing the overall structural strength of the annular rubber pad 1 to further improve the reliability of use of the alarm valve cover pad. Preferably, the metal limit cylinder 21 is a stainless steel limit cylinder, and the metal connecting rod 22 is a stainless steel connecting rod. The annular rubber pad 1 and the metal support skeleton 2 are vulcanized and fixed as a whole, thereby making the fixed connection between the annular rubber pad 1 and the metal support skeleton 2 more stable.

[0025] At least one rubber cloth layer 17 is fixedly disposed in the bottom of the annular rubber pad body 1 , which is beneficial to enhancing the overall structural strength of the annular rubber pad body 1 .

[0026] In addition, since the annular groove 12 is compatible with the annular sealing insert 31 on the valve cover 3, the alarm valve cover gasket can be sleeved on the annular sealing insert 31 of the valve cover 3 through the annular groove 12, thereby playing a certain positioning role, which is beneficial to the rapid and accurate alignment and installation of the alarm valve cover gasket on the valve cover 3.

[0027] Preferably, the depth of the annular groove 12 is 2-3 mm, and the thickness of the annular rubber pad 1 is 6-10 mm.

[0028] The above are only some specific implementation methods of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. An alarm valve cover gasket, characterized in that: It includes an annular rubber pad, which is provided with a plurality of mounting holes along its circumference, and a plurality of metal limiting cylinders are fixedly covered in the annular rubber pad. The plurality of metal limiting cylinders correspond to the plurality of mounting holes one by one and are coaxially arranged. The upper end of the metal limiting cylinder extends upward to a position close to the upper end surface of the annular rubber pad, and the lower end of the metal limiting cylinder extends downward to a position close to the lower end surface of the annular rubber pad. The upper end surface of the annular rubber pad is provided with an annular groove at the inner circumferential edge, and the upper part of the annular rubber pad is stepped, and a primary annular step sealing surface and a secondary annular step sealing surface are sequentially formed from the inside to the outside.

2. The alarm valve cover gasket according to claim 1, characterized in that: The annular rubber pad is in a rectangular frame shape, and the four outer peripheral surfaces of the annular rubber pad are all arc-shaped surfaces.

3. The alarm valve cover gasket according to claim 1, characterized in that: Circular reinforcement parts are fixedly provided on the annular rubber pad around the plurality of mounting holes.

4. The alarm valve cover gasket according to claim 1, characterized in that: The number of the mounting holes is 4-8.

5. The alarm valve cover gasket according to claim 1, characterized in that: A metal connecting rod is fixed between the bottoms of two adjacent metal limiting cylinders, and a plurality of the metal limiting cylinders and a plurality of the metal connecting rods are spliced ​​in the annular rubber pad to form a metal support frame.

6. The alarm valve cover gasket according to claim 5, characterized in that: The metal limiting cylinder is a stainless steel limiting cylinder, and the metal connecting rod is a stainless steel connecting rod.

7. The alarm valve cover gasket according to claim 5, characterized in that: The annular rubber pad is vulcanized and fixed to the metal support frame as a whole.

8. The alarm valve cover gasket according to claim 1, characterized in that: At least one rubber cloth layer is fixedly arranged in the bottom of the annular rubber pad.

9. The alarm valve cover gasket according to claim 1, characterized in that: The depth of the annular groove is 2-3 mm, and the thickness of the annular rubber pad is 6-10 mm.

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