Elastic double-spring flooding plug seal

Abstract

The utility model provides an elastic double-spring flooding plug seal, which relates to the technical field of flooding plug seals and comprises a support ring, a sealing ring and two one-way flooding plugs, and each one-way flooding plug sequentially comprises an outer sealing lip body and an inner sealing lip body from outside to inside. According to the utility model, when a system does not have pressure, the V-shaped spring provides initial sealing force for the spring seal, so that the lip of the sealing jacket clings to a working surface, low-pressure leakage is prevented, and when the system has pressure, medium pressure acts on all directions in the groove of the spring seal, so that the lip clings to a sealing surface, and the sealing performance of the two-way spring seal is improved; when the two-way spring is in a low-temperature environment, the V-shaped spring can compensate sealing force, so that the two-way spring has a normal and good sealing effect, and the two-way spring has the advantages of high compression amount, capability of being used under normal-temperature and low-temperature working conditions and low friction coefficient, can tolerate various media and harsh working environments, prolongs the service life of the two-way spring, and is suitable for popularization and application. And installation is convenient, and the application pressure range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of pan plug seals, in particular to an elastic double-spring pan plug seal. Background Art

[0002] The pan-seal is also called spring energy storage seal, spring actuated seal, PTFE spring seal, etc. It is a high-performance seal made of a PTFE sealing ring with a stainless steel spring embedded in it. The appropriate spring force plus the system fluid pressure pushes the sealing lip (surface) out and gently presses the sealed metal surface to produce a very excellent sealing effect. The spring has U-shape, V-shape, O-shape, etc. The pan-seal is a special seal developed for high-temperature corrosion, difficult lubrication, and low-friction application environments. It is a combination of different Teflon composite materials, advanced engineering plastics and corrosion-resistant metal springs.

[0003] In the prior art, under low temperature conditions, in order to seal two media in different directions, a bidirectional seal composed of two unidirectional seals is usually required for sealing. The seal usually directly uses an O-ring, or uses a pan-seal composed of a sealing jacket of polytetrafluoroethylene and an internal elastic element of an H-type spring. If an O-ring is used, compared with a spring, the friction coefficient is larger, the seal is not resistant to low temperatures, the service life is short, and the sealing performance of the seal is reduced, and various performances are relatively poor. If a pan-seal with an internal H-type spring is used instead of an O-ring, the production cost of the product will increase. At the same time, during the installation process, the H-type spring has a large spring force and is not easy to deform, which makes it difficult to install. In view of the above problems, an elastic double-spring pan-seal is proposed. Utility Model Content

[0004] The utility model mainly provides an elastic double-spring flood plug seal which has small starting resistance, small difference in dynamic friction coefficient and is easy to install.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an elastic double-spring pan-plug seal, comprising a support ring, a sealing ring and two one-way pan-plugs, the one-way pan-plug comprising an outer sealing lip body and an inner sealing lip body from the outside to the inside, a mounting groove is provided between the outer sealing lip body and the inner sealing lip body at a position close to the lip, and a V-shaped spring is provided in the mounting groove, a groove contact end is provided on the one-way pan-plug on the side of the mounting groove away from the lip, a side contact end contacting with the side wall of the support ring is provided on the side of the one-way pan-plug away from the V-shaped spring, an outer convex lip body is provided on the side of the outer sealing lip body close to the lip, an outer lip block is provided on the side of the outer convex lip body facing the lip, an inner convex lip body is provided on the side of the inner sealing lip body close to the lip, and an inner lip block is provided on the side of the inner convex lip body facing the lip.

[0006] Preferably, an outer contact end is provided between the mounting groove and the outer lip block, and an inner contact end is provided between the mounting groove and the inner lip block. When the system has no pressure, the V-shaped spring provides an initial sealing force for the pan-seal, so that the lip of the sealing jacket is tightly attached to the working surface to prevent low-pressure leakage.

[0007] Preferably, one end of the V-shaped spring is arranged in contact with the outer contact end, and the other end of the V-shaped spring is arranged in contact with the inner contact end. When the system is under pressure, the medium pressure acts in all directions in the pan-seal groove, so that the lip is tightly attached to the sealing surface.

[0008] Preferably, the V-shaped spring is arranged in contact with the groove contact end on the one-way universal plug, the cross-section of the mounting groove is a trapezoidal groove body structure, and the V-shaped spring can be a double-layer V-shaped spring composed of two V-shaped springs according to actual conditions, and the sealing jacket plays a supporting and sealing role.

[0009] Preferably, the outer sealing lip and the inner sealing lip are of equal length, and the outer convex lip and the inner convex lip are of equal length. The outer sealing lip and the inner sealing lip allow the two-way flood plug to wear appropriately without affecting the sealing performance of the two-way flood plug.

[0010] Preferably, the outer sealing lip body, the outer convex lip body and the outer lip block are integrally formed, the inner sealing lip body, the inner convex lip body and the inner lip block are integrally formed, the outer sealing lip body, the outer convex lip body, the outer lip block, the inner sealing lip body, the inner convex lip body and the inner lip block constitute a sealing jacket, and a sealing jacket and a V-shaped spring constitute a one-way pan-plug.

[0011] Compared with the prior art, the advantages and positive effects of the utility model are:

[0012] 1. In the utility model, the two-way flood plug is composed of two one-way flood plugs, a support ring and a sealing ring. When the system has no pressure, the flood plug seal is provided with an initial sealing force by a V-shaped spring, so that the lip of the sealing jacket is closely attached to the working surface to prevent low-pressure leakage. When the system has pressure, the medium pressure acts in all directions in the flood plug seal groove, so that the lip is closely attached to the sealing surface, thereby improving the sealing performance of the two-way flood plug. When the two-way flood plug is in a low temperature environment, the sealing jacket will shrink, resulting in a decrease in sealing force, but the V-shaped spring can compensate for the sealing force in time, so that the two-way flood plug can achieve a normal and good sealing effect.

[0013] 2. In the utility model, the bidirectional universal plug has the advantages of high compression and wide applicable temperature range, and can be used under normal temperature and low temperature conditions. Compared with rubber and polyurethane materials, the bidirectional universal plug has a low friction coefficient and can withstand various media and harsh working environments, thereby increasing the service life of the bidirectional universal plug and reducing the cost of use, making the various performances of the bidirectional universal plug relatively good. In addition, the bidirectional universal plug is easy to install, has a wide application pressure range, has low starting resistance, has a small difference in dynamic friction coefficient, and starts and runs smoothly without shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A cross-sectional schematic diagram of an elastic double-spring pan plug seal is proposed for the utility model;

[0015] Figure 2 A schematic cross-sectional view of a one-way pan-plug seal with elastic double springs is provided for the utility model;

[0016] Figure 3 The utility model provides a cross-sectional schematic diagram of a V-shaped spring with an elastic double-spring pan-plug seal.

[0017] Legend: 1. One-way plug; 2. Support ring; 3. Sealing ring; 4. External sealing lip; 5. External convex lip; 6. External lip block; 7. External contact end; 8. Internal sealing lip; 9. Internal convex lip; 10. Internal lip block; 11. Internal contact end; 12. V-shaped spring; 13. Mounting groove; 14. Groove contact end; 15. Side contact end. DETAILED DESCRIPTION

[0018] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0020] See also Figure 1-Figure 3 The utility model provides a technical solution: an elastic double-spring pan-plug seal, comprising a support ring 2, a sealing ring 3 and two one-way pan-plugs 1, the one-way pan-plug 1 comprising an outer sealing lip body 4 and an inner sealing lip body 8 from outside to inside, a mounting groove 13 is provided between the outer sealing lip body 4 and the inner sealing lip body 8 near the lip, and a V-shaped spring 12 is provided in the mounting groove 13, a groove contact end 14 is provided on the one-way pan-plug 1 on the side of the mounting groove 13 away from the lip, a side contact end 15 in contact with the side wall of the support ring 2 is provided on the side of the one-way pan-plug 1 away from the V-shaped spring 12, an outer convex lip body 5 is provided on the side of the outer sealing lip body 4 near the lip, an outer lip block 6 is provided on the side of the outer convex lip body 5 facing the lip, an inner convex lip body 9 is provided on the side of the inner sealing lip body 8 near the lip, and an inner lip block 10 is provided on the side of the inner convex lip body 9 facing the lip.

[0021] like Figure 2 and Figure 3As shown, an outer contact end 7 is provided between the mounting groove 13 and the outer lip block 6, and an inner contact end 11 is provided between the mounting groove 13 and the inner lip block 10. When the system has no pressure, the V-shaped spring 12 provides an initial sealing force for the flood seal, so that the lip of the sealing jacket is tightly attached to the working surface to prevent low-pressure leakage.

[0022] like Figure 2 and Figure 3 As shown, one end of the V-shaped spring 12 is arranged in contact with the outer contact end 7, and the other end of the V-shaped spring 12 is arranged in contact with the inner contact end 11. When the system is under pressure, the medium pressure acts in all directions in the pan-seal groove, so that the lip is tightly attached to the sealing surface.

[0023] like Figure 2 and Figure 3 As shown, the V-shaped spring 12 is arranged in contact with the groove contact end 14 on the one-way universal plug 1, and the cross section of the mounting groove 13 is a trapezoidal groove structure. The V-shaped spring 12 can be a double-layer V-shaped spring composed of two V-shaped springs according to actual conditions, and the sealing jacket plays a supporting role and a sealing role.

[0024] like Figure 2 As shown, the outer sealing lip 4 and the inner sealing lip 8 are of equal length, the outer convex lip 5 and the inner convex lip 9 are of equal length, and the outer sealing lip 4 and the inner sealing lip 8 allow the two-way flood plug to wear appropriately without affecting the sealing performance of the two-way flood plug.

[0025] like Figure 2 As shown, the outer sealing lip body 4, the outer convex lip body 5 and the outer lip block 6 are integrally formed, the inner sealing lip body 8, the inner convex lip body 9 and the inner lip block 10 are integrally formed, the outer sealing lip body 4, the outer convex lip body 5, the outer lip block 6, the inner sealing lip body 8, the inner convex lip body 9 and the inner lip block 10 constitute a sealing jacket, and a sealing jacket and a V-shaped spring 12 constitute a one-way flood plug 1.

[0026] The use method and working principle of the device: The two-way universal plug is composed of two one-way universal plugs 1, a support ring 2 and a sealing ring 3. Each one-way universal plug 1 is composed of a sealing jacket (an outer sealing lip body 4, an outer convex lip body 5, an outer lip block 6, an inner sealing lip body 8, an inner convex lip body 9 and an inner lip block 10 form a sealing jacket) and a V-shaped spring 12. The V-shaped spring 12 can be a double-layer V-shaped spring composed of two V-shaped springs according to actual conditions. The sealing jacket plays a supporting role and a sealing role, and the V-shaped spring 12 provides an initial sealing force;

[0027] When the bidirectional flood plug is in use, when the system has no pressure, the flood plug seal is provided with an initial sealing force by the V-shaped spring 12, so that the lip of the sealing jacket is closely attached to the working surface to prevent low-pressure leakage. When the system has pressure, the medium pressure acts in all directions in the flood plug seal groove, so that the lip is closely attached to the sealing surface. When the bidirectional flood plug is in a low-temperature environment, the sealing jacket will shrink, resulting in a decrease in sealing force, but the V-shaped spring 12 can compensate for the sealing force in time, so that the bidirectional flood plug can achieve a normal and good sealing effect.

[0028] The bidirectional universal plug is a bidirectional universal plug that can adapt to normal temperature and low temperature working conditions, and has the advantages of high compression and wide applicable temperature range. Compared with rubber and polyurethane materials, the bidirectional universal plug has a low friction coefficient and can withstand various media and harsh working environments, thereby increasing the service life of the bidirectional universal plug, solving the problem of reduced sealing performance of the existing universal plug when used under low temperature conditions, and reducing the cost of use. In addition, the bidirectional universal plug is easy to install, solving the problem of high cost and difficulty in installation caused by the existing universal plug using a built-in H-type spring. The bidirectional universal plug has a wide application pressure range, small starting resistance, small difference in dynamic friction coefficient, and smooth starting and running without jitter.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An elastic double spring flood seal, characterized in that: The invention comprises a support ring (2), a sealing ring (3) and two one-way plugs (1), wherein the one-way plug (1) comprises an outer sealing lip body (4) and an inner sealing lip body (8) in sequence from the outside to the inside, a mounting groove (13) is provided between the outer sealing lip body (4) and the inner sealing lip body (8) at a position close to the lip, and a V-shaped spring (12) is provided in the mounting groove (13), and a groove contact end (12) is provided on the one-way plug (1) at a side of the mounting groove (13) away from the lip. 4), a side contact end (15) contacting the side wall of the support ring (2) is provided on the side of the one-way seal (1) away from the V-shaped spring (12), an outer convex lip (5) is provided on the side of the outer sealing lip (4) close to the lip opening, an outer lip block (6) is provided on the side of the outer convex lip (5) facing the lip opening, an inner convex lip (9) is provided on the side of the inner sealing lip (8) close to the lip opening, and an inner lip block (10) is provided on the side of the inner convex lip (9) facing the lip opening.

2. The elastic double spring flood seal according to claim 1, characterized in that: An outer contact end (7) is arranged between the mounting groove (13) and the outer lip block (6), and an inner contact end (11) is arranged between the mounting groove (13) and the inner lip block (10).

3. The elastic double spring flood seal according to claim 2, characterized in that: One end of the V-shaped spring (12) is arranged in contact with the outer contact end (7), and the other end of the V-shaped spring (12) is arranged in contact with the inner contact end (11).

4. The elastic double spring flood seal according to claim 1, characterized in that: The V-shaped spring (12) is arranged in contact with the groove contact end (14) on the one-way universal plug (1), and the cross section of the installation groove (13) is a trapezoidal groove body structure.

5. The elastic double spring flood seal according to claim 1, characterized in that: The outer sealing lip (4) and the inner sealing lip (8) are of equal length, and the outer convex lip (5) and the inner convex lip (9) are of equal length.

6. The elastic double spring flood seal according to claim 1, characterized in that: The outer sealing lip body (4), the outer convex lip body (5) and the outer lip block (6) are integrally formed, and the inner sealing lip body (8), the inner convex lip body (9) and the inner lip block (10) are integrally formed.

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