CN218236260U - A sealing structure for a safety valve - Google Patents

Abstract

The utility model discloses a sealing structure for a safety valve, which relates to the technical field of safety valve sealing. In order to solve the problem that the connection between the existing safety valve and the pipeline is only sealed by a single sealing ring, due to safety The valve needs to withstand the high pressure of the fluid, so after a long time of use, the sealing ring cannot provide a good sealing operation for the connection between the safety valve and the pipeline. The seal body includes a first sealing section and a second sealing section, a sealing gas groove is provided on the side surface of the second sealing section, and a gas flow channel is provided inside the first sealing section and the second sealing section A rubber airbag is glued to one end surface of the first sealing section, and the two ends of the gas flow channel communicate with the inside of the rubber airbag and the sealing air groove respectively, and an elastic rubber sheet is glued to the opening of the sealing air groove .

Description

A sealing structure for a safety valve

technical field

The utility model relates to the technical field of sealing of safety valves, in particular to a sealing structure for safety valves.

Background technique

The safety valve is a special valve whose opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, it discharges the medium to the outside of the system to prevent the medium pressure in the pipeline or equipment from exceeding the specified value. , in the process of using the safety valve, it is necessary to ensure the sealing performance of its own internal structure, and at the same time, it is necessary to ensure the sealing performance of the connection between the safety valve and the external pipeline.

The existing safety valve is only sealed by a single sealing ring at the connection with the pipeline. Since the safety valve needs to withstand the high pressure of the fluid, the sealing ring cannot be a good seal for the safety valve after long-term use. Good sealing operation is provided at the connection with the pipeline; therefore, the market urgently needs to develop a sealing structure for safety valves to help people solve existing problems.

Utility model content

The purpose of this utility model is to provide a sealing structure for a safety valve to solve the problem that the connection between the existing safety valve and the pipeline in the above-mentioned background technology is only sealed by a single sealing ring. Under the high pressure of the fluid, the sealing ring cannot provide a good sealing operation for the connection between the safety valve and the pipeline after a long period of use.

In order to achieve the above object, the utility model provides the following technical solutions: a sealing structure for a safety valve, including a seal body, the seal body includes a first sealing section and a second sealing section, and the second sealing section A sealing air groove is arranged on the side surface of the first sealing section and a gas flow channel is arranged inside the first sealing section and the second sealing section, and a rubber air bag is glued on one end surface of the first sealing section, and the gas flow channel The two ends of the rubber air bag and the inside of the sealing air groove respectively communicate with each other, and an elastic rubber sheet is adhered to the opening of the sealing air groove.

Preferably, both the first sealing section and the second sealing section are annular, and the size of the flow hole of the first sealing section is smaller than the size of the flow hole of the second sealing section.

Preferably, there are multiple gas flow passages and rubber airbags, and the number of gas flow passages and rubber airbags are consistent and their positions correspond to each other.

Preferably, a safety valve seat is provided on the outside of the seal body, a flow pipe is fixedly connected to the outer surface of the safety valve seat, and the seal body is located at the interface of the flow pipe.

Preferably, the rubber airbag is located inside the flow pipe, and the rubber airbag is placed in the fluid.

Preferably, the first sealing section and the second sealing section are integrally connected.

Compared with the prior art, the beneficial effects of the utility model are:

1. The utility model makes the seal body include a first sealing section and a second sealing section, a sealing gas groove is provided on the side surface of the second sealing section, and a gas flow channel is provided inside the first sealing section and the second sealing section , one end surface of the first sealing section is glued with a rubber airbag, and the two ends of the gas flow channel communicate with the inside of the rubber airbag and the sealing air groove respectively, and the glue at the opening of the sealing air groove has an elastic rubber sheet, which can be used During the process of the safety valve, the fluid inside the pipeline will exert a squeezing force on the rubber airbag, and then the air in the rubber airbag will enter the inside of the sealing air groove along the gas flow channel. At this time, the air pressure inside the sealing air groove increases. Then the elastic rubber sheet at the opening of the sealing air groove protrudes outwards, so that the outer surface of the elastic rubber sheet can be tightly attached to the inner wall of the delivery pipeline, effectively realizing that the greater the fluid pressure in the pipeline, the elastic rubber The tighter the fit between the sheet and the pipe, the more effectively the sealing performance of the sealing structure is improved.

Description of drawings

Fig. 1 is the overall schematic diagram of the utility model;

Fig. 2 is the overall schematic diagram of the seal body of the utility model;

Fig. 3 is a diagram of the internal structure of the seal body of the present invention.

In the figure: 1. Safety valve seat; 2. Flow pipe; 3. Seal body; 4. Rubber airbag; 5. Elastic rubber sheet; 6. Gas flow channel; 7. Sealing gas groove; 8. First sealing section ; 9, the second sealing section.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example.

Please refer to Figures 1-3, an embodiment provided by the utility model: a sealing structure for a safety valve, including a seal body 3, the seal body 3 includes a first sealing section 8 and a second sealing section 9, The side surface of the second sealing section 9 is provided with a sealing gas groove 7, and the interior of the first sealing section 8 and the second sealing section 9 is provided with a gas flow channel 6, and a rubber airbag is glued on one end surface of the first sealing section 8 4. The two ends of the gas flow channel 6 communicate with the inside of the rubber air bag 4 and the sealing air groove 7 respectively. The glue at the opening of the sealing air groove 7 is bonded with an elastic rubber sheet 5, and the first sealing section 8 and the second sealing section 9 are both Ring-shaped, the flow hole size of the first sealing section 8 is smaller than the flow hole size of the second sealing section 9, there are multiple gas flow passages 6 and rubber airbags 4, and the number of gas flow passages 6 and rubber airbags 4 is consistent and The positions are one-to-one correspondence, the rubber airbag 4 is located inside the flow pipe 2, and the rubber airbag 4 is placed in the fluid, the first sealing section 8 and the second sealing section 9 are integrally connected, which can be used in the process of using the safety valve. The internal fluid will produce a squeezing force on the rubber air bag 4, and then the air in the rubber air bag 4 will enter the inside of the sealing air groove 7 along the gas flow channel 6. At this time, the air pressure value inside the sealing air groove 7 will increase, thereby making the The elastic rubber sheet 5 at the opening of the sealing air groove 7 protrudes outwards, so that the outer surface of the elastic rubber sheet 5 can be tightly attached to the inner wall of the delivery pipeline, effectively realizing that the greater the fluid pressure in the pipeline, the greater the elasticity. The tighter the rubber sheet 5 adheres to the pipe, the more effectively the sealing performance of the sealing structure is improved.

Further, a safety valve seat 1 is provided outside the seal body 3 , and a flow pipe 2 is fixedly connected to the outer surface of the safety valve seat 1 , and the seal body 3 is located at the interface of the flow pipe 2 .

Working principle: When in use, first install the safety valve in the designated pipeline. When fluid passes through the pipeline, the rubber airbag 4 located inside the pipeline will sag inward under the extrusion force of the fluid. At this time, the rubber airbag will The air in 4 enters the inside of the sealing air groove 7 along the gas flow channel 6, and the air pressure value inside the sealing air groove 7 increases, thereby making the elastic rubber sheet 5 at the opening of the sealing air groove 7 protrude outward, thereby making the elastic The outer surface of the rubber sheet 5 can be tightly attached to the inner wall of the conveying pipeline, effectively realizing that the greater the fluid pressure in the pipeline, the tighter the elastic rubber sheet 5 is attached to the pipeline.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. A sealing structure for a safety valve, comprising a seal body (3), characterized in that: the seal body (3) includes a first sealing section (8) and a second sealing section (9), the A sealing gas groove (7) is provided on the side surface of the second sealing section (9), and a gas flow channel (6) is provided inside the first sealing section (8) and the second sealing section (9), so A rubber airbag (4) is glued to the end surface of the first sealing section (8), and the two ends of the gas flow channel (6) communicate with the inside of the rubber airbag (4) and the sealing air groove (7) respectively, An elastic rubber sheet (5) is adhered to the opening of the sealing air groove (7) by glue. 2. A sealing structure for a safety valve according to claim 1, characterized in that: the first sealing section (8) and the second sealing section (9) are both ring-shaped, and the first The flow hole size of the sealing section (8) is smaller than the flow hole size of the second sealing section (9). 3. A sealing structure for a safety valve according to claim 1, characterized in that: multiple gas flow passages (6) and rubber airbags (4) are provided, and the gas flow passages (6) Consistent with the number and position of the rubber airbags (4), there is a one-to-one correspondence. 4. A sealing structure for a safety valve according to claim 1, characterized in that: a safety valve seat (1) is provided outside the seal body (3), and the safety valve seat ( 1) is fixedly connected with a flow pipe (2) on the outer surface, and the seal body (3) is located at the interface of the flow pipe (2). 5. A sealing structure for a safety valve according to claim 4, characterized in that: the rubber airbag (4) is located inside the flow pipe (2), and the rubber airbag (4) is placed in the fluid. 6. A sealing structure for a safety valve according to claim 1, characterized in that: the first sealing section (8) and the second sealing section (9) are integrally connected.

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