Sealing device for cross-core skin electric heat tracing

Abstract

The utility model discloses a sealing device for cross-core skin electric heat tracing, and relates to the technical field of electric heat tracing sealing. The sealing device comprises a front sleeve, a rear sleeve, a tensioning mechanism and a plurality of sealing rings, one end of the front sleeve is integrally connected with a sealing outer pipe, the outer diameter and the inner diameter of the sealing outer pipe are larger than the outer diameter and the inner diameter of the front sleeve respectively, and an outer step face is formed at the joint of the sealing outer pipe and the outer wall of the front sleeve. And an inner step surface is formed at the joint of the sealing outer pipe and the inner wall of the front sleeve. Through the design of the tensioning mechanism, the tensioning force between the front casing pipe and the rear casing pipe can be actively improved, so that the sealing performance is greatly improved, meanwhile, the designed front casing pipe and the rear casing pipe can form a long sealing space, a large number of stacked sealing rings can be arranged, the sealing effect can be improved, and the sealing performance is improved. And meanwhile, the elastic space with the large length is provided, so that the sealing range is widened, and the sealing effect is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric heat tracing sealing technical field, especially, relate to a kind of sealing device for through skin electric heat tracing. BACKGROUND

[0002] For the connection of through skin electric heat tracing needs to be set sealing, and now sealing uses fixed sealing structure, such as sealing ring structure, however, due to the influence of external force, pressure influence accompanied by vibration influence, it can cause the problem of reducing the sealing effect of connection, thereby affecting the use effect and service life of the whole system. SUMMARY

[0003] The utility model discloses a kind of sealing devices for through skin electric heat tracing, by the design of tensioning mechanism, the tension of the front sleeve pipe and the rear sleeve pipe can be actively improved, to greatly improve sealing performance, while the front sleeve pipe and the rear sleeve pipe designed in it can form relatively long sealing space, can be arranged with relatively more number of laminated sealing ring, not only can improve sealing effect, simultaneously with relatively large elastic space, to improve sealing range, further improve sealing effect.

[0004] To solve the above technical problems, the utility model is realized by the following technical schemes:

[0005] The utility model discloses a kind of sealing devices for through skin electric heat tracing, including front sleeve pipe, rear sleeve pipe, tensioning mechanism and several sealing rings;

[0006] The front sleeve pipe one end is integrally connected with sealing outer tube, the outer diameter and the inner diameter of the sealing outer tube are greater than the outer diameter and the inner diameter of the front sleeve pipe respectively, the connecting place of the sealing outer tube and the outer wall of the front sleeve pipe forms outer step surface, the connecting place of the sealing outer tube and the inner wall of the front sleeve pipe forms inner step surface;

[0007] The rear sleeve pipe circumferential surface is integrally provided with step ring;

[0008] The tensioning mechanism includes first connecting seat, second connecting seat and a group of stud bolts;

[0009] A group of stud bolt ports are arranged on the first connecting seat and the second connecting seat, the first connecting seat is sleeved on the front sleeve pipe and is attached to outer step surface, the second connecting seat is sleeved on the rear sleeve pipe and is attached to one side of step ring;

[0010] The rear sleeve pipe of the side of step ring away from second connecting seat forms short insertion tube, the short insertion tube one end gap is arranged in sealing outer tube inner end portion, several sealing rings are laminated and arranged in sealing outer tube and located between short insertion tube and inner step surface position;

[0011] The double-end screw is provided with a tightening nut at each end, and the double-end screw penetrates through two screw holes in the first connecting seat and the second connecting seat, and the tightening nuts at the two ends of the double-end screw are respectively pressed on the opposite sides of the first connecting seat and the second connecting seat.

[0012] Further, the first connecting seat and the second connecting seat are both cylindrical seat plates, the inner hole diameter of the first connecting seat is consistent with the outer diameter of the rear sleeve, and the inner hole diameter of the second connecting seat is consistent with the outer diameter of the rear sleeve.

[0013] Further, the tightening nut is composed of a set of hexagonal nuts, and the two hexagonal nuts are arranged in layers.

[0014] Further, the double-end screw comprises a polished rod section, and a threaded section is integrally arranged at each end of the polished rod section, and the tightening nut is threadedly arranged on the threaded section.

[0015] Further, the sealing ring is a nitrile rubber ring, and the outer diameter of the sealing ring is consistent with the inner diameter of the sealing outer tube.

[0016] Further, a metal flat gasket is arranged between the two adjacent sealing rings, between the inner step surface and the sealing ring, and between the end surface of the short insertion tube and the sealing ring, and the inner diameter and the outer diameter of the metal flat gasket are respectively consistent with the inner diameter and the outer diameter of the sealing ring.

[0017] The utility model has the following beneficial effects:

[0018] The utility model discloses a front sleeve and a rear sleeve are designed, can actively improve the tension between the front sleeve and the rear sleeve, can greatly improve the tensile strength between the front sleeve and the rear sleeve, can improve the fastening between the front sleeve and the rear sleeve, can greatly improve the sealing performance, and the front sleeve and the rear sleeve can form a sealing space with a relatively long length, and a plurality of laminated sealing rings can be arranged, so that the sealing effect is improved, and the elastic space is relatively large, so that the sealing range is improved, and the sealing effect is further improved.

[0019] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages mentioned above. DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without any creative labor.

[0021] Fig. 1 It is a structure schematic view of the utility model discloses a kind of through skin electric heat tracing sealing device.

[0022] Fig. 2 A structural section view of the present application;

[0023] In the drawings, the components represented by each reference numeral are listed as follows:

[0024] 1 - front sleeve, 2 - rear sleeve, 3 - tensioning mechanism, 4 - sealing ring, 5 - metal flat gasket, 101 - sealing outer tube, 102 - outer step surface, 103 - inner step surface, 201 - step ring, 202 - short insertion tube, 301 - first connecting seat, 302 - second connecting seat, 303 - double-headed screw rod, 304 - screw rod opening, 305 - tightening nut. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0026] Please refer to Figs. 1-2 The utility model discloses a kind of sealing devices for through-core skin electric heat tracing, including front sleeve 1, rear sleeve 2, tensioning mechanism 3 and several sealing rings 4.

[0027] The front sleeve 1 is integrally connected with a sealing outer tube 101 at one end, the outer diameter and the inner diameter of the sealing outer tube 101 are greater than the outer diameter and the inner diameter of the front sleeve 1 respectively, the connection between the sealing outer tube 101 and the outer wall of the front sleeve 1 forms an outer step surface 102, and the connection between the sealing outer tube 101 and the inner wall of the front sleeve 1 forms an inner step surface 103.

[0028] The rear sleeve 2 is integrally provided with a step ring 201 on the lateral surface.

[0029] The tensioning mechanism 3 includes a first connecting seat 301, a second connecting seat 302 and a set of double-headed screw rods 303.

[0030] A set of screw rod openings 304 are provided on the first connecting seat 301 and the second connecting seat 302, the first connecting seat 301 is sleeved on the front sleeve 1 and adheres to the outer step surface 102, and the second connecting seat 302 is sleeved on the rear sleeve 2 and adheres to one side of the step ring 201.

[0031] The rear sleeve 2 away from the second connecting seat 302 side of the step ring 201 forms a short insertion tube 202, the short insertion tube 202 is gap-set at the inner end of the sealing outer tube 101, and the several sealing rings 4 are stacked in the sealing outer tube 101 and located between the short insertion tube 202 and the inner step surface 103.

[0032] The double-end screw 303 is threadedly connected with the tightening nuts 305 at both ends, the double-end screw 303 penetrates through the two screw ports 304 in the first connecting seat 301 and the second connecting seat 302, and the tightening nuts 305 at both ends of the double-end screw 303 are respectively pressed on the opposite sides of the first connecting seat 301 and the second connecting seat 302.

[0033] As shown in the figure, Figs. 1-2 The first connecting seat 301 and the second connecting seat 302 are both cylindrical seat plates, the inner hole of the first connecting seat 301 has the same inner diameter as the outer diameter of the rear sleeve 2, and the inner hole of the second connecting seat 302 has the same inner diameter as the outer diameter of the rear sleeve 2.

[0034] As shown in the figure, Figs. 1-2 The tightening nut 305 is composed of a group of hexagonal nuts, and the two hexagonal nuts are arranged in layers.

[0035] As shown in the figure, Figs. 1-2 The double-end screw 303 includes a smooth rod section, the smooth rod section is integrally provided with a threaded section at both ends, and the tightening nut 305 is threadedly arranged on the threaded section.

[0036] As shown in the figure, Fig. 2 The sealing ring 4 is a butyl rubber ring, and the outer diameter of the sealing ring 4 is consistent with the inner diameter of the sealing outer tube 101.

[0037] As shown in the figure, Fig. 2 Metallic flat gaskets 5 are arranged between the adjacent two sealing rings 4, between the inner stepped surface 103 and the sealing ring 4, and between the end surface of the short insertion tube 202 and the sealing ring 4, and the inner diameter and the outer diameter of the metallic flat gaskets 5 are respectively consistent with the inner diameter and the outer diameter of the sealing ring 4.

[0038] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details, nor limit the present application to the specific embodiments described. Obviously, according to the content of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that the persons skilled in the art can well understand and utilize the present application. The present application is limited by the claims and the entire scope and equivalents thereof.

Claims

1. A sealing device for use in a through-feed skin-effect electrical tracing, characterized by: It comprises a front sleeve (1), a rear sleeve (2), a tensioning mechanism (3) and a plurality of sealing rings (4); One end of the front sleeve (1) is integrally connected with a sealing outer tube (101), the outer diameter and the inner diameter of the sealing outer tube (101) are greater than the outer diameter and the inner diameter of the front sleeve (1) respectively, the connection between the sealing outer tube (101) and the outer wall of the front sleeve (1) forms an outer step surface (102), and the connection between the sealing outer tube (101) and the inner wall of the front sleeve (1) forms an inner step surface (103); The rear sleeve (2) is integrally provided with a step ring (201) on the peripheral side surface; The tensioning mechanism (3) comprises a first connecting seat (301), a second connecting seat (302) and a set of double-headed screw rods (303); A set of screw rod openings (304) are arranged on the first connecting seat (301) and the second connecting seat (302), the first connecting seat (301) is sleeved on the front sleeve (1) and is attached to the outer step surface (102), and the second connecting seat (302) is sleeved on the rear sleeve (2) and is attached to one side of the step ring (201); The rear sleeve (2) away from one side of the second connecting seat (302) forms a short insertion tube (202), one end of the short insertion tube (202) is arranged in the inner end of the sealing outer tube (101) with a gap, and a plurality of the sealing rings (4) are arranged in the sealing outer tube (101) and are located between the short insertion tube (202) and the inner step surface (103); The double-headed screw rods (303) are threadedly connected with tightening nuts (305) at both ends, the double-headed screw rods (303) penetrate through the two screw rod openings (304) concentrically arranged on the first connecting seat (301) and the second connecting seat (302), and the tightening nuts (305) at both ends of the double-headed screw rods (303) are respectively pressed on the opposite sides of the first connecting seat (301) and the second connecting seat (302).

2. The sealing device for use in skinning of a skinning electrical heating conductor according to claim 1, characterized in that The first connecting seat (301) and the second connecting seat (302) are both cylindrical seat plates, the inner hole diameter of the first connecting seat (301) is consistent with the outer diameter of the rear sleeve (2), and the inner hole diameter of the second connecting seat (302) is consistent with the outer diameter of the rear sleeve (2).

3. The sealing device for use in skinning of a core-skin electrical heating cable according to claim 1, characterized in that The tightening nuts (305) are composed of a set of hexagonal nuts, and the two hexagonal nuts are arranged in layers.

4. The sealing device for use in skinning of a core-skin electrical heating cable according to claim 1, characterized in that The double-headed screw rods (303) comprise a light rod section, the light rod section is integrally provided with threaded sections at both ends, and the tightening nuts (305) are threadedly arranged on the threaded sections.

5. The sealing device for use in skinning of a core according to claim 1, wherein The sealing rings (4) are nitrile rubber rings, and the outer diameter of the sealing rings (4) is consistent with the inner diameter of the sealing outer tube (101).

6. The sealing device for use in skinning of a core conductor according to claim 1, characterized in that Metallic flat gaskets (5) are arranged between adjacent two sealing rings (4), between the inner step surface (103) and the sealing ring (4), and between the end surface of the short insertion tube (202) and the sealing ring (4), and the inner diameter and the outer diameter of the metallic flat gaskets (5) are respectively consistent with the inner diameter and the outer diameter of the sealing ring (4).

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