Negative pressure rubber sealing ring

Abstract

The utility model discloses a negative pressure rubber sealing ring which comprises a sealing ring main body and a plurality of negative pressure structures, a plurality of extrusion bags are arranged on an inner ring of the sealing ring main body, a plurality of pressure relief grooves are formed in an outer ring of the sealing ring main body, the plurality of negative pressure structures are embedded in the sealing ring main body, and each negative pressure structure comprises an air bag, an air channel and a floating ball. The sealing ring has the beneficial effects that a negative pressure cavity is formed in the sealing ring by adopting a method of designing a negative pressure structure in the sealing ring main body, so that enough supporting force is ensured under the condition that the sealing ring is made of soft materials, and the sealing effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing rings, in particular to a negative pressure rubber sealing ring. Background Art

[0002] In the valve body structure, the sealing ring is a key component to ensure gas sealing, and is mostly used for sealing between the valve stem, valve body and valve cover.

[0003] Traditional sealing rings generally have the problem that if the hardness is too high, the sealing effect is poor, and if the hardness is too low, it is easy to fall off. As a result, it is difficult to ensure that the sealing ring always maintains an effective sealing effect during use. It often wears or even deforms due to external pressure, causing equipment failure. Utility Model Content

[0004] The purpose of the utility model is to provide a negative pressure rubber sealing ring to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a negative pressure rubber sealing ring, comprising a sealing ring body and a plurality of negative pressure structures, wherein a plurality of extrusion bags are arranged on the inner ring of the sealing ring body, a plurality of pressure relief grooves are opened on the outer ring of the sealing ring body, a plurality of the negative pressure structures are embedded in the sealing ring body, and the negative pressure structures include an air bag, an airway and a floating ball.

[0007] Furthermore, the plurality of extrusion bags and the sealing ring body are an integrally formed structure, and the extrusion bags and the air bags are arranged correspondingly.

[0008] Furthermore, the pressure relief groove is a strip groove and is vertically arranged on the outer ring of the sealing ring body.

[0009] Furthermore, the air passage comprises a front section channel, a rear section channel and an air outlet channel, and a cut-off port is provided between the front section channel and the rear section channel.

[0010] Furthermore, the length of the front section channel is greater than the length of the rear section channel, and the front section channel is connected to the air bag.

[0011] Furthermore, an angle is formed between the air outlet channel and the rear section channel, and one end of the air outlet channel is connected to the pressure relief groove.

[0012] Furthermore, the floating ball is located in the rear channel, and the diameter of the floating ball is greater than the diameter of the intercepting port.

[0013] Beneficial effect: A negative pressure rubber sealing ring adopts a method of designing a negative pressure structure inside the sealing ring body to form a negative pressure cavity inside the sealing ring, so as to ensure sufficient supporting force for the sealing ring when the material is soft, thereby ensuring the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0016] Figure 3 It is a partial structural sectional view of the utility model.

[0017] Reference numerals

[0018] 1-sealing ring body, 2-negative pressure structure, 21-air bag, 22-air channel, 221-front channel, 222-rear channel, 223-air outlet channel, 224-interceptor, 23-floating ball, 3-extrusion bag, 4-pressure relief groove. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] Example

[0021] like Figure 1-3 As shown, a negative pressure rubber sealing ring includes a sealing ring body 1 and multiple negative pressure structures 2. Multiple extrusion bags 3 are provided on the inner ring of the sealing ring body 1, and multiple pressure relief grooves 4 are opened on the outer ring of the sealing ring body 1. Multiple negative pressure structures 2 are embedded in the sealing ring body 1, and the negative pressure structures 2 include air bags 21, air ducts 22 and floating balls 23.

[0022] Multiple extrusion bags 3 and the sealing ring body 1 are integrally formed. The extrusion bags 3 are arranged corresponding to the air bags 21. When the extrusion bags 3 are subjected to pressure, the inner side of the sealing ring body 1 is squeezed to squeeze out the gas in the air bag 21. The extruded gas flows along the airway 22.

[0023] The air channel 22 includes a front channel 221, a rear channel 222 and an air outlet channel 223. A cutoff port 224 is provided between the front channel 221 and the rear channel 222. The length of the front channel 221 is greater than that of the rear channel 222. The front channel 221 is connected to the air bag 21. The air bag 21 is connected to the pressure relief groove 4 through the air channel 22. The extruded air bag 21 discharges the gas, and the gas passes through the front channel 221, the rear channel 222 and the air outlet channel 223 in sequence. There is an angle between the air outlet channel 223 and the rear channel 222. One end of the air outlet channel 223 is connected to the pressure relief groove 4. The air outlet channel 223 gradually narrows toward the direction of the pressure relief groove 4, and part of the gas is squeezed out of the sealing ring body 1 by the pressure relief groove 4.

[0024] The floating ball 23 is located in the rear channel 222, and the diameter of the floating ball 23 is larger than the diameter of the intercepting port 224. The gas squeezed out from the front channel 221 pushes the floating ball 23 out along the rear channel 222, and the gas is decelerated due to the gradually narrowing outlet channel 223. When the pressure relief groove 4 is blocked, the internal gas forms a certain negative pressure state, and the floating ball 23 flows back and blocks the intercepting port 224, thereby forming a negative pressure chamber inside the sealing ring body 1.

[0025] In the utility model, when the sealing ring is put on the installation component, the extrusion bag 3 is subjected to pressure to squeeze out the gas in the air bag 21 and flow to the airway 22, and part of the gas is discharged from the pressure relief groove 4. As the installation is gradually in place, the end of the pressure relief groove 4 is blocked, and the floating ball 23 refluxes to block the intercepting port 224. The front section channel 221 forms a negative pressure state, which solves the problem of ensuring sufficient supporting force for the sealing ring when the material is soft, thereby ensuring the sealing effect.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the utility model content within the protection scope of the utility model.

Claims

1. A negative pressure rubber sealing ring, characterized in that: The invention comprises a sealing ring body (1) and a plurality of negative pressure structures (2), wherein the inner ring of the sealing ring body (1) is provided with a plurality of extrusion bags (3), the outer ring of the sealing ring body (1) is provided with a plurality of pressure relief grooves (4), the plurality of negative pressure structures (2) are embedded in the sealing ring body (1), and the negative pressure structures (2) comprise an air bag (21), an air channel (22) and a floating ball (23).

2. A negative pressure rubber sealing ring according to claim 1, characterized in that: The plurality of extrusion bags (3) and the sealing ring body (1) are an integrally formed structure, and the extrusion bags (3) and the air bags (21) are arranged correspondingly.

3. The negative pressure rubber sealing ring according to claim 1, characterized in that: The pressure relief groove (4) is a strip-shaped groove and is vertically arranged on the outer ring of the sealing ring body (1).

4. The negative pressure rubber sealing ring according to claim 1, characterized in that: The air channel (22) comprises a front section channel (221), a rear section channel (222) and an air outlet channel (223), and a choke port (224) is provided between the front section channel (221) and the rear section channel (222).

5. A negative pressure rubber sealing ring according to claim 4, characterized in that: The length of the front section channel (221) is greater than the length of the rear section channel (222), and the front section channel (221) is in communication with the air bag (21).

6. The negative pressure rubber sealing ring according to claim 4, characterized in that: An included angle is formed between the air outlet channel (223) and the rear channel (222), and one end of the air outlet channel (223) is connected to the pressure relief groove (4).

7. The negative pressure rubber sealing ring according to claim 4, characterized in that: The floating ball (23) is located in the rear section channel (222), and the diameter of the floating ball (23) is greater than the diameter of the intercepting port (224).

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