A valve seat sealing device for a pilot-operated safety valve

Abstract

The utility model discloses a valve seat sealing device for a pilot safety valve, which belongs to the technical field of pilot safety valves, and includes a safety valve body, wherein an early warning structure is arranged on the outside of the safety valve body; the early warning structure includes a first flange connected to the air inlet end of the safety valve body, and a sealing gasket is clamped on the side of the first flange away from the safety valve body. By setting the early warning structure, the sealing gasket is clamped on the first flange, and during the clamping process, the first abutment block abuts against the switch, and then the second flange is clamped with the other side of the sealing gasket, and then the first flange and the second flange are connected by bolts and nuts. When the sealing gasket is deformed or contracted, the first abutment block is driven to detach from the switch by the first spring. At this time, the switch sends a signal to the alarm to remind personnel that there is a problem with the sealing of the safety valve body. By timely maintenance, serious medium leakage problems can be effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of pilot-operated safety valves, and in particular relates to a valve seat sealing device of a pilot-operated safety valve. Background Art

[0002] The pilot-operated safety valve is a mechanical safety device for overpressure relief, mainly used in various pressure pipes and pressure vessels. The pilot-operated safety valve is a special type of safety valve, and its design usually includes two main parts: the main valve and the pilot valve. The pilot valve is used to control the opening and closing of the main valve to adjust the system pressure.

[0003] However, when the pilot-operated safety valve is used, the sealing material may shrink when it encounters a low temperature environment. As the use time increases, the sealing device will be affected by wear and aging, resulting in a decrease in sealing performance. If it is not maintained in time, it may cause serious media leakage problems.

[0004] In order to solve the above problems, the present application proposes a valve seat sealing device for a pilot-operated safety valve. Utility Model Content

[0005] In view of the problems in the related technology, the utility model proposes a valve seat sealing device for a pilot-operated safety valve to overcome the above technical problems existing in the existing related technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A valve seat sealing device for a pilot-operated safety valve comprises a safety valve body, wherein an early warning structure is arranged outside the safety valve body;

[0008] The early warning structure includes a first flange connected to the air inlet end of the safety valve body, a sealing gasket is clamped on the side of the first flange away from the safety valve body, a rubber block is installed on the outer wall of the sealing gasket, the outer wall of the rubber block is slidably connected with the inner wall of the first flange, a first spring is installed on the rubber block, a first abutting block is installed on the end of the first spring away from the rubber block, a switch is installed on the inner wall of the first flange, one end of the first abutting block away from the first spring abuts against the outer wall of the switch, a second flange is attached to the side of the sealing gasket away from the first flange, an alarm is provided on the outer wall of the first flange, and the alarm is electrically connected to the switch.

[0009] A second spring is installed on one side of the rubber block adjacent to the first spring, a second abutment block is installed on the side of the second spring away from the rubber block, and the side of the second abutment block away from the second spring abuts against the inner wall of the first flange. The second spring and the second abutment block are provided to improve the stability of the rubber block when it moves.

[0010] An outer shell is installed on the outer wall of the first flange, and the inner bottom wall of the outer shell is fixedly connected to the bottom wall of the alarm. By providing the outer shell, the protection effect of the alarm is effectively improved.

[0011] A door panel is hinged on one side of the shell away from the alarm, and the outer wall of the door panel is connected to the inner wall of the shell. By providing the door panel, the protective effect of the alarm is further improved.

[0012] The outer wall of the shell is installed with a breathable plate, and there are two breathable plates, which are symmetrically distributed on both sides of the shell. By arranging the breathable plates, the ventilation effect inside the shell is effectively improved.

[0013] To sum up, the technical effects and advantages of the utility model are as follows: the valve seat sealing device of the pilot-operated safety valve clamps the sealing gasket on the first flange by setting an early warning structure. During the clamping process, the first abutment block abuts against the switch, and then the second flange is clamped against the other side of the sealing gasket, and then the first flange and the second flange are connected by bolts and nuts. When the sealing gasket is deformed or contracted, the first abutment block is driven to detach from the switch by the first spring. At this time, the switch sends a signal to the alarm to remind personnel that there is a problem with the sealing of the safety valve body. By timely maintenance, serious medium leakage problems can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the explosion of the early warning structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the spring and abutment block of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the housing and alarm of the utility model.

[0018] In the figure:

[0019] 1. Safety valve body;

[0020] 2. Early warning structure; 201. First flange; 202. Sealing pad; 203. Rubber block; 204. First spring; 205. First abutment block; 206. Second spring; 207. Second abutment block; 208. Second flange; 209. Switch; 210. Alarm;

[0021] 3. Outer shell; 4. Ventilation panel; 5. Door panel. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-3 A valve seat sealing device of a pilot-operated safety valve comprises a safety valve body 1, an early warning structure 2 is arranged outside the safety valve body 1, the early warning structure 2 comprises a first flange 201 connected to the air inlet end of the safety valve body 1, six threaded holes are provided on the first flange 201, a sealing gasket 202 is clamped on the side of the first flange 201 away from the safety valve body 1, a rubber block 203 is installed on the outer wall of the sealing gasket 202, the outer wall of the rubber block 203 is slidably connected to the inner wall of the first flange 201, there are six rubber blocks 203, which are equidistantly distributed around the circumference of the sealing gasket 202, and six notches for the rubber blocks 203 are also provided on the first flange 201.

[0024] A first spring 204 is installed on the rubber block 203, a first abutment block 205 is installed at one end of the first spring 204 away from the rubber block 203, a switch 209 is installed on the inner wall of the first flange 201, a first spring 204 and a first abutment block 205 are installed on each rubber block 203, and a switch 209 is installed in the notch opened in each first flange 201.

[0025] One end of the first abutment block 205 away from the first spring 204 abuts against the outer wall of the switch 209, and the side of the sealing gasket 202 away from the first flange 201 is fitted with the second flange 208. The outer wall of the first flange 201 is provided with an alarm 210, and the alarm 210 is electrically connected to the switch 209, so that the sealing gasket 202 is clamped on the first flange 201. During the clamping process, the first abutment block 205 abuts against the switch 209, wherein the switch 209 is set to a mode in which pressing does not energize and loosening energizes. When the sealing gasket 202 is deformed or contracted, the first abutment block 205 will be driven to detach from the switch 209 through the first spring 204. At this time, the switch 209 sends a signal to the alarm 210 to remind personnel that there is a problem with the sealing of the safety valve body 1.

[0026] A second spring 206 is installed on one side of the rubber block 203 adjacent to the first spring 204, and a second abutting block 207 is installed on the side of the second spring 206 away from the rubber block 203. The side of the second abutting block 207 away from the second spring 206 abuts against the inner wall of the first flange 201. Two second springs 206 and second abutting blocks 207 are symmetrically installed on each rubber block 203, and the size of the second abutting block 207 is larger than that of the first abutting block 205. When the first abutting block 205 abuts against the switch 209, the second abutting block 207 abuts against the inner wall of the first flange 201, thereby effectively improving the stability of the rubber block 203 during movement.

[0027] Rubber blocks 203 , first springs 204 , first abutment blocks 205 , second springs 206 , and second abutment blocks 207 of the same number and size are installed on both sides of the sealing gasket 202 , and the same switch 209 is also installed on the second flange 208 .

[0028] Reference Figure 3-4 A shell 3 is installed on the outer wall of the first flange 201, and the inner bottom wall of the shell 3 is fixedly connected to the bottom wall of the alarm 210. The shell 3 is provided to provide a certain protection for the alarm 210. A door panel 5 is hinged on the side of the shell 3 away from the alarm 210, and the outer wall of the door panel 5 is connected to the inner wall of the shell 3. The door panel 5 is provided to effectively improve the protection effect of the alarm 210 and facilitate personnel to maintain the alarm 210.

[0029] The outer wall of the shell 3 is installed with a breathable plate 4. There are two breathable plates 4, which are symmetrically distributed on both sides of the shell 3. The set breathable plates 4 effectively improve the ventilation effect of the shell 3 and the heat dissipation effect of the alarm 210.

[0030] Working principle:

[0031] The sealing gasket 202 is clamped on the first flange 201. During the clamping process, the first abutting block 205 abuts against the switch 209, and the second abutting block 207 abuts against the inner wall of the first flange 201. The second flange 208 is then clamped against the other side of the sealing gasket 202, and the first abutting block 205 and the second abutting block 207 installed on the other side of the first flange 201 abut against the second flange 208 and the switch 209 respectively. The first flange 201 and the second flange 208 are then connected by bolts and nuts. When the sealing gasket 202 is deformed or contracted, the first abutting block 205 is driven to detach from the switch 209 by the first spring 204. At this time, the switch 209 sends a signal to the alarm 210 to remind personnel that there is a problem with the sealing of the safety valve body 1. By maintaining it in time, serious medium leakage problems can be effectively avoided.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve seat sealing device for a pilot-operated safety valve, comprising a safety valve body (1), characterized in that: An early warning structure (2) is arranged outside the safety valve body (1); The early warning structure (2) comprises a first flange (201) connected to the air inlet end of the safety valve body (1); a sealing gasket (202) is clamped on a side of the first flange (201) away from the safety valve body (1); a rubber block (203) is installed on the outer wall of the sealing gasket (202); the outer wall of the rubber block (203) is slidably connected to the inner wall of the first flange (201); a first spring (204) is installed on the rubber block (203); the first spring (204) is away from the rubber block (2 03) is installed with a first abutment block (205) at one end, a switch (209) is installed on the inner wall of the first flange (201), an end of the first abutment block (205) away from the first spring (204) abuts against the outer wall of the switch (209), a second flange (208) is attached to the side of the sealing gasket (202) away from the first flange (201), an alarm (210) is provided on the outer wall of the first flange (201), and the alarm (210) is electrically connected to the switch (209).

2. A valve seat sealing device for a pilot-operated safety valve according to claim 1, characterized in that: A second spring (206) is installed on a side of the rubber block (203) adjacent to the first spring (204), a second abutment block (207) is installed on a side of the second spring (206) away from the rubber block (203), and a side of the second abutment block (207) away from the second spring (206) abuts against an inner wall of the first flange (201).

3. The valve seat sealing device of a pilot-operated safety valve according to claim 1, characterized in that: An outer wall of the first flange (201) is mounted with an outer shell (3), and an inner bottom wall of the outer shell (3) is fixedly connected to a bottom wall of the alarm (210).

4. A valve seat sealing device for a pilot-operated safety valve according to claim 3, characterized in that: A door panel (5) is hingedly connected to a side of the housing (3) away from the alarm (210), and an outer wall of the door panel (5) is connected to an inner wall of the housing (3).

5. The valve seat sealing device of a pilot-operated safety valve according to claim 3, characterized in that: An air permeable plate (4) is installed on the outer wall of the outer shell (3), and there are two air permeable plates (4) which are symmetrically distributed on both sides of the outer shell (3).

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