CN216078821U

CN216078821U - Rubber gasket

Info

Publication number: CN216078821U
Application number: CN202121198579.9U
Authority: CN
Inventors: 曹馨月
Original assignee: Chengdu Tongguanxin Technology Co ltd
Current assignee: Chengdu Tongguanxin Technology Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-03-18
Anticipated expiration: 2031-05-31

Abstract

The utility model relates to the technical field of sealing elements, and provides a rubber sealing gasket which comprises a circular body, wherein two end surfaces of the body are a sealing end surface and a mounting end surface respectively; a circle of annular sealing lip is arranged on the sealing end face; the part of the sealing end face, which is positioned on the outer side of the sealing lip, forms a first contact surface, and the part of the sealing end face, which is positioned on the inner side of the sealing lip, forms a second contact surface. The rubber sealing gasket provided by the embodiment of the utility model has a good sealing effect; the existing axial sealing is changed into radial sealing by arranging the annular sealing lip; when in sealing, the sealing lip only needs to extend into the fluid pipeline, and the sealing lip is tightly attached to the inner wall of the fluid pipeline to form radial sealing; in this case, as long as it is ensured that the seal lip does not disengage from the inner wall of the fluid pipe, the seal of the rubber packing is not made ineffective regardless of the fluid pressure in the fluid pipe, and the reliability of the seal is ensured.

Description

Rubber gasket

Technical Field

The utility model relates to the technical field of sealing elements, in particular to a rubber sealing gasket.

Background

The patent application No. 202022192134.1, application date 2020.09.29, entitled flow passage on-off control device, discloses a valve seal assembly for sealing the end of a pipeline, and fig. 1 is a schematic structural diagram of the valve seal assembly.

Referring to fig. 1, the valve seal assembly includes a mounting plate 101 having a mounting plane 102, an annular seal gasket 103 disposed on the mounting plane 102, a positioning cylinder 104 fixed on the mounting plane 102 and penetrating through an inner hole of the annular seal gasket 103, and a limiting ring 105 fixedly connected to the positioning cylinder 104 and configured to limit and attach the annular seal gasket 103 to the mounting plane 102; the outer diameter of the limiting ring 105 is smaller than the outer diameter of the annular sealing gasket 103 and larger than the inner diameter of the annular sealing gasket 103.

Fig. 2 is a schematic diagram of a fluid conduit 106 end seal using the valve seal assembly of fig. 1. Referring to fig. 2, the annular sealing gasket 103 contacts with the end surface of the fluid pipe 106, and the motor drives the actuator to move, so that an axial thrust F1 is generated, so that the annular sealing gasket 103 deforms and is tightly attached to the end surface of the fluid pipe 106, thereby achieving sealing, and for simplifying the view, the structure of the motor and the actuator is not shown in fig. 2.

However, this sealing structure has the following disadvantages:

1. in practical use, the sealing force F2 of the annular seal 103 against the end face of the fluid conduit 106 is the difference between the axial thrust F1 of the actuator against the annular seal 103 and the axial thrust F3 of the fluid in the fluid conduit 106 against the annular seal 103, that is, F2 is F1-F3. When the axial thrust F1 of the actuator to the annular seal 103 is kept constant and the axial thrust F3 of the fluid in the fluid conduit 106 to the annular seal 103 is gradually increased, the sealing force F2 of the annular seal 103 to the end surface of the fluid conduit 106 is gradually decreased, and when the sealing force F2 of the annular seal 103 to the end surface of the fluid conduit 106 is decreased to a certain degree, the annular seal 103 loses the sealing capability, and the sealing is failed, so that the sealing effect of the existing valve seal assembly is poor.

2. In order to generate a sufficient sealing force F2 by the annular sealing gasket 103 on the end surface of the fluid conduit 106, the actuator needs to generate a sufficient axial thrust F1 on the annular sealing gasket 103, so that a motor with higher power must be selected, and a reducer with a larger reduction ratio is adopted to increase the axial thrust F1 of the actuator on the annular sealing gasket 103, which significantly increases the manufacturing cost of the flow passage opening and closing control device.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a rubber sealing gasket with good sealing effect.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the rubber sealing gasket comprises a circular body, and two end faces of the body are a sealing end face and a mounting end face respectively; a circle of annular sealing lip is arranged on the sealing end face; the part of the sealing end face, which is positioned on the outer side of the sealing lip, forms a first contact surface, and the part of the sealing end face, which is positioned on the inner side of the sealing lip, forms a second contact surface.

Furthermore, a circle of sealing convex ribs are arranged on the outer side surface of one end, far away from the body, of the sealing lip.

Further, the outer edge of the end, away from the body, of the sealing lip is provided with a first chamfer.

Further, the outer edge of the installation end face is provided with a second chamfer.

Further, a sealing cover is arranged in the sealing lip; the edge of the sealing cover is in sealing connection with a second contact surface of the sealing end surface; an annular pressure groove is formed between the inner side surface of the sealing lip and the sealing cover.

Further, the cross section of the pressure groove is V-shaped.

Furthermore, an installation groove with a T-shaped cross section is formed by surrounding the inner side surface of the body, the second contact surface and the inner surface of the sealing cover.

The utility model has the beneficial effects that:

1. the rubber sealing gasket provided by the embodiment of the utility model has a good sealing effect; the existing axial sealing is changed into radial sealing by arranging the annular sealing lip; when in sealing, the sealing lip only needs to extend into the fluid pipeline, and the sealing lip is tightly attached to the inner wall of the fluid pipeline to form radial sealing; in this case, as long as the axial thrust F1 of the actuator to the rubber seal is greater than or equal to the axial thrust F3 of the fluid in the fluid pipeline to the rubber seal, i.e., F1-F3 are greater than or equal to 0, the sealing lip is ensured not to be separated from the inner wall of the fluid pipeline, and the sealing of the rubber seal cannot be failed regardless of the fluid pressure in the fluid pipeline, so that the sealing reliability is ensured.

2. In the actual use process of the rubber sealing gasket provided by the embodiment of the utility model, the fluid in the fluid pipeline can apply radial acting force on the sealing lip to provide auxiliary sealing, so that the sealing lip is tightly attached to the inner wall of the fluid pipeline, and the greater the fluid pressure in the fluid pipeline is, the tighter the attachment of the sealing lip and the inner wall of the fluid pipeline is, and the better the sealing effect is.

3. The rubber sealing gasket provided by the embodiment of the utility model can greatly reduce the axial thrust required by the actuating mechanism to the sealing gasket, thereby reducing the power of a motor and the reduction ratio of a speed reducer and reducing the manufacturing cost of a runner opening and closing control device.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below; it is obvious that the drawings in the following description are only some embodiments described in the present invention, and that other drawings can be obtained from these drawings by a person skilled in the art without inventive effort.

FIG. 1 is a schematic structural view of a prior art valve seal assembly;

FIG. 2 is a schematic illustration of a prior art valve seal assembly for sealing an end of a fluid conduit;

FIG. 3 is a schematic structural view of a rubber packing according to an embodiment of the present invention;

FIG. 4 is a schematic view of a fluid conduit end seal using the rubber gasket of FIG. 3;

FIG. 5 is another schematic structural view of a rubber packing according to an embodiment of the present invention;

fig. 6 is a schematic view of a structure for sealing an end of a fluid pipe using the rubber packing of fig. 5.

The reference numbers in the figures are: 101-mounting plate, 102-mounting plane, 103-annular sealing gasket, 104-positioning cylinder, 105-spacing ring, 106-fluid pipe, 201-body, 202-sealing end surface, 203-mounting end surface, 204-sealing lip, 205-first contact surface, 206-second contact surface, 207-sealing convex rib, 208-first chamfer, 209-second chamfer, 210-sealing cover, 211-pressure groove, 212-mounting groove, 213-fluid pipe, 214-mounting plate, 215-positioning cylinder, 216-spacing ring.

Detailed Description

In order that those skilled in the art will better understand the present invention, the following further description is provided in conjunction with the accompanying drawings and examples. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. The embodiments and features of the embodiments of the utility model may be combined with each other without conflict.

Fig. 3 is a schematic structural view of a rubber gasket according to an embodiment of the present invention.

Referring to fig. 3, the rubber gasket provided in the embodiment of the present invention is an integrally formed structure, and includes a circular body 201, where two end surfaces of the body 201 are a sealing end surface 202 and a mounting end surface 203 respectively; a circle of annular sealing lips 204 are arranged on the sealing end face 202; the portion of the sealing end face 202 located outside the sealing lip 204 forms a first contact surface 205 and the portion of the sealing end face 202 located inside the sealing lip 204 forms a second contact surface 206.

Fig. 4 is a schematic view of a structure for sealing an end of a fluid pipe using the rubber packing of fig. 3.

Referring to fig. 4, the utility model also provides a mounting seat for mounting the rubber gasket. The mounting seat comprises a circular mounting plate 214, a positioning cylinder 215 coaxially fixed on one surface of the mounting plate 214, and a limiting ring 216 which is arranged at one end of the positioning cylinder 215 far away from the mounting plate 214 and extends outwards in the radial direction; the outer diameter of the positioning cylinder 215 is equal to the inner diameter of the body 201; the distance between the mounting plate 214 and the limiting ring 216 is less than or equal to the thickness of the body 201 at the corresponding position. When the end of the fluid pipe 213 needs to be sealed, the rubber gasket provided by the embodiment of the utility model is installed on the installation seat arranged at the end of the fluid pipe 213; specifically, the body 201 of the rubber sealing gasket is sleeved on the positioning cylinder 215 between the mounting plate 214 and the limit ring 216, the limit ring 216 is in close contact with the second contact surface 206 of the sealing end surface 202 of the body 201, and the mounting end surface 203 of the body 201 is in close contact with the surface of the mounting plate 214 and realizes sealing, so as to prevent fluid from leaking between the mounting end surface 203 of the body 201 and the surface of the mounting plate 214; then, the motor drives the actuator to move to provide axial thrust to drive the mounting seat to move towards the fluid pipeline 213, so that the sealing lip 204 on the body 201 extends into the inner cavity of the fluid pipeline 213, the sealing lip 204 is tightly attached to the inner wall of the fluid pipeline 213 to form radial sealing, and after the first contact surface 205 of the sealing end surface 202 of the body 201 is contacted with the end surface of the fluid pipeline 213, the motor stops working and controls the position of the mounting seat to be kept unchanged. The structure of the motor and the actuator are not shown in fig. 4 for simplicity of illustration.

The rubber sealing gasket provided by the embodiment of the utility model has a good sealing effect; the existing axial sealing is changed into radial sealing by arranging the annular sealing lip 204; during sealing, the sealing lip 204 only needs to extend into the fluid pipeline 213, and the sealing lip 204 is tightly attached to the inner wall of the fluid pipeline 213 to form radial sealing; in this case, as long as the axial thrust F1 of the actuator on the rubber seal is greater than or equal to the axial thrust F3 of the fluid in the fluid pipe 213 on the rubber seal, i.e., F1-F3 are greater than or equal to 0, it is ensured that the seal lip 204 does not separate from the inner wall of the fluid pipe 213, and the seal of the rubber seal is not failed regardless of the fluid pressure in the fluid pipe 213, thereby ensuring the reliability of the seal.

In actual use, the fluid in the fluid conduit 213 may exert a radial force on the sealing lip 204 to provide an auxiliary seal, such that the sealing lip 204 is tightly attached to the inner wall of the fluid conduit 213, and the greater the fluid pressure in the fluid conduit 213, the tighter the sealing lip 204 is attached to the inner wall of the fluid conduit 213, and the better the sealing effect.

Compared with the prior art, the rubber sealing gasket provided by the embodiment of the utility model can greatly reduce the axial thrust required by the actuating mechanism to the sealing gasket, further reduce the power of a motor and the reduction ratio of a speed reducer, and reduce the manufacturing cost of a runner opening and closing control device.

With continued reference to fig. 3, in the rubber sealing gasket provided by the embodiment of the present invention, a sealing rib 207 is disposed on an outer side surface of the end of the sealing lip 204 away from the body 201. By arranging the circle of the sealing convex rib 207, when the sealing device is used, the sealing convex rib 207 is tightly attached to the inner wall of the fluid pipeline 213, the contact area between the sealing lip 204 and the inner wall of the fluid pipeline 213 can be reduced, and the axial force required by the axial movement of the actuating mechanism driven by the motor when the fluid pipeline 213 is opened and closed is reduced.

With continued reference to fig. 3, in the rubber sealing gasket provided by the embodiment of the present invention, the outer edge of the end of the sealing lip 204 away from the body 201 is provided with a first chamfer 208. By providing a circle of first chamfer 208, the outer diameter of the end of sealing lip 204 away from body 201 is smaller than the inner diameter of fluid conduit 213, facilitating smooth insertion of sealing lip 204 into fluid conduit 213.

With continued reference to fig. 3, in the rubber gasket provided by the embodiment of the present invention, the outer edge of the mounting end surface 203 is provided with a second chamfer 209. Through setting up round second chamfer 209, after installing the rubber packing pad to the mount pad like this, reduced the area of contact of body 201 with mounting panel 214, and then reduced body 201 axial force receiving area, under the condition of the same axial compression volume, the axial thrust of demand is littleer.

In the embodiment shown in fig. 4, in rare cases, due to installation and manufacturing errors, the fluid in the fluid conduit 213 may leak from the position where the body 201 contacts the retainer ring 216, the positioning cylinder 215, and the mounting plate 214.

Fig. 5 is another schematic structural diagram of the rubber gasket according to the embodiment of the present invention.

Referring to fig. 5, in the rubber gasket provided in the embodiment of the present invention, a sealing cover 210 is disposed inside the sealing lip 204; the edge of the sealing cover 210 is in sealing connection with the second contact surface 206 of the sealing end surface 202; an annular pressure groove 211 is formed between the inner side surface of the sealing lip 204 and the sealing cover 210. The cross-sectional shape of the pressure groove 211 is V-shaped. A mounting groove 212 with a T-shaped cross section is defined between the inner side surface of the body 201, the second contact surface 206 and the inner surface of the sealing cover 210. The cross section of the pressure groove 211 and the cross section of the mounting groove 212 each refer to a section coplanar with the axis of the body 201.

Referring to fig. 6, the rubber packing is mounted on the mounting seat through the mounting groove 212, and the sealing cover 210 is provided to completely isolate the fluid in the fluid pipe 213 from the mounting seat, thereby solving the problem that the fluid may leak from the contact position of the body 201 with the stop ring 216, the positioning cylinder 215 and the mounting plate 214 in the embodiment of fig. 4. By providing the pressure groove 211, the fluid in the fluid conduit 213 exerts a radial force on the sealing lip 204, so that the sealing rib 207 on the sealing lip 204 is tightly attached to the inner wall of the fluid conduit 213.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The rubber sealing gasket comprises a circular body (201), and two end faces of the body (201) are a sealing end face (202) and a mounting end face (203) respectively; the sealing device is characterized in that a circle of annular sealing lip (204) is arranged on the sealing end face (202); the part of the sealing end face (202) positioned outside the sealing lip (204) forms a first contact surface (205), and the part of the sealing end face (202) positioned inside the sealing lip (204) forms a second contact surface (206).

2. The rubber sealing gasket according to claim 1, characterized in that the outer side of the end of the sealing lip (204) away from the body (201) is provided with a ring of sealing ribs (207).

3. Rubber gasket according to claim 1 or 2, characterized in that the outer edge of the end of the sealing lip (204) remote from the body (201) is provided with a first chamfer (208).

4. Rubber gasket according to claim 1 or 2, characterized in that the outer edge of the mounting end face (203) is provided with a second chamfer (209).

5. Rubber gasket according to claim 1 or 2, characterized in that a sealing cover (210) is arranged in the sealing lip (204); the edge of the sealing cover (210) is in sealing connection with the second contact surface (206) of the sealing end surface (202); an annular pressure groove (211) is formed between the inner side surface of the sealing lip (204) and the sealing cover (210).

6. The rubber sealing gasket according to claim 5, wherein the cross-sectional shape of the pressure groove (211) is V-shaped.

7. A rubber gasket according to claim 5, characterized in that the inner side of the body (201), the second contact surface (206) and the inner surface of the sealing cover (210) enclose between them a mounting groove (212) having a T-shaped cross-section.