CN223434903U - Pipe sealing connection device - Google Patents

Abstract

The utility model provides a pipeline sealing connection device which comprises a support pipe and a rubber sealing structure sleeved and fixed outside the support pipe, wherein a fluid channel is arranged in the support pipe, the rubber sealing structure comprises end sealing sleeves positioned at two ends of the support pipe, the end sealing sleeves are inserted into a pipeline to be connected to realize sealing connection of the support pipe and the pipeline to be connected, grooves for forming sealing lips are formed in the opposite end faces of the two end sealing sleeves, a medium cavity for containing pressure medium is formed between the two end sealing sleeves, the pipeline sealing connection device and the pipeline to be connected are in plug connection, the connection is convenient, and when the pipeline sealing connection device is inserted into the pipeline to be connected, the end sealing sleeves are compressed and deformed to form a first seal, and the pressure medium in the medium cavity can apply certain pressure to the sealing lips to enable the sealing lips to be pressed on the inner wall of the pipeline to be connected to form a second seal, so that the sealing reliability is effectively improved.

Description

Pipeline sealing connection device

Technical Field

The utility model belongs to the technical field of pipeline connection, and particularly relates to a pipeline sealing connection device.

Background

In the fields of petroleum, chemical engineering, mechanical equipment, etc., it is often necessary to connect two pipes to effect transfer of fluids within the pipes. In pipe connections, seals are provided at the connections of the pipes in order to avoid leakage of fluid within the pipes.

At present, most of connection modes among pipelines are welding, flange connection or socket connection, wherein the sealing effect of the welding connection is best, but the pipelines cannot be disassembled and replaced after the welding is finished, and the application range is narrow. The flange connection is to connect two pipelines through the flange, and a sealing gasket is arranged between the flanges to ensure the tightness of connection, but the flange connection is only suitable for the connection of pipelines with flanges, and when the flange connection is performed, more bolts are required to be screwed, and the flange connection has higher requirements on the consistency of the pretightening force of the bolts, so that the problem of inconvenient installation exists. The socket pipe connection is to seal the joint of the two pipes in the socket pipe with the sealing ring by using the sealing ring, and the connection mode is convenient and simple, but has poor sealing effect and is often leaked. Therefore, how to improve the convenience and sealing reliability of the pipe connection is a problem that needs to be considered at present.

Disclosure of utility model

In view of the above-mentioned drawbacks of the prior art, the present utility model is to provide a pipe sealing connection device with convenient installation and reliable sealing.

The utility model provides a pipeline sealing connection device, which comprises a support pipe and a rubber sealing structure sleeved and fixed outside the support pipe, wherein a fluid channel is arranged in the support pipe, the rubber sealing structure comprises end sealing sleeves positioned at two ends of the support pipe and used for being inserted into a pipeline to be connected so as to realize sealing connection of the support pipe and the pipeline to be connected, grooves for forming sealing lips are formed on opposite end surfaces of the two end sealing sleeves, a medium cavity for containing pressure medium is formed between the two end sealing sleeves, the pipeline sealing connection device is in plug connection with the pipeline to be connected, the connection is convenient, and when the pipeline sealing connection device is inserted into the pipeline to be connected, the end sealing sleeves are compressed and deformed so as to realize first sealing between the support pipe and the pipeline to be connected, and the pressure medium arranged in the medium cavity can exert certain pressure on the sealing lips so as to enable the sealing lips to be pressed on the inner wall of the pipeline to be connected so as to realize second sealing between the support pipe and the pipeline to be connected, meanwhile, the sealing lips can also prevent pollution from entering the pipeline to be connected, and the pipeline to realize bidirectional sealing.

Preferably, the inner surface of the sealing lip comprises a stress surface extending obliquely from outside to inside along the insertion direction of the end sealing sleeve, and the sealing lip is pressed on the inner wall of the pipeline to be connected when the pressure medium presses the stress surface so as to realize bidirectional sealing.

Preferably, one end of the end sealing sleeve, which is far away from the sealing lip, is a guiding end so as to guide the end sealing sleeve to be smoothly inserted into a pipeline to be connected, and the installation convenience is improved.

The sealing convex points or the sealing convex strips are arranged on the outer surface of the end sealing sleeve, the tightness between the end sealing sleeve and the inner wall of the pipeline to be connected can be increased by introducing the sealing convex points or the sealing convex strips, so that a large pressure is formed between the end sealing sleeve and the pipeline to be connected, the purpose of enhancing the sealing effect is achieved, meanwhile, the pressure can be dispersed by the existence of the sealing convex points or the sealing convex strips, the stress concentration of the end sealing sleeve is reduced, and the service life of the end sealing sleeve is prolonged.

Preferably, the rubber sealing structure comprises a middle sleeve, wherein the middle sleeve is used for connecting the two end sealing sleeves, and the installation stability of the end sealing sleeves is guaranteed.

Preferably, the support tube comprises a first tube section and a second tube section, and the first tube section and the second tube section are hard tubes so as to ensure the stability of the sealing structure.

Preferably, the support tube comprises a middle tube section for connecting the first tube section and the second tube section, the middle tube section is a bendable flexible tube, and the angle of the first tube section and the second tube section is changed by bending the middle tube section so as to adapt to the connection of pipelines under different angles.

Preferably, the support tube comprises a middle tube section for connecting the first tube section and the second tube section, wherein the middle tube section is a hard tube, and the center line of the first tube section is parallel to the center line of the second tube section so as to meet the connection of two parallel but different coaxial pipelines.

Preferably, the first pipe section and the second pipe section are coaxially arranged to satisfy the connection of two coaxial pipes.

Preferably, the rubber sealing structure and the supporting tube are fixed in an adhesive or hot melt mode, and a user can select the rubber sealing structure and the supporting tube according to the needs.

As described above, the pipe sealing connection device according to the present utility model has the following advantageous effects:

The pipeline sealing connecting device has the advantages that the connecting sealing of two pipelines to be connected is realized in an inserting mode, the connecting is convenient, when the end sealing sleeve of the pipeline sealing connecting device is inserted into the pipelines to be connected, the end sealing sleeve can be compressed and deformed to realize the first sealing, a certain pressure is applied to the sealing lip by pressure medium arranged in the medium cavity, so that the sealing lip is pressed on the inner wall of the pipelines to be connected to realize the second sealing, the pipeline sealing connecting device can realize double sealing, the sealing reliability is effectively improved, in addition, the sealing lip can prevent external pollution from entering the pipelines to be connected, and the sealing reliability is further ensured.

Drawings

FIG. 1 is a view showing a state of sealing and abutting joint of a pipe sealing and connecting device and two pipes to be connected in the application.

FIG. 2 is a cross-sectional view of a pipe sealing connection in accordance with one embodiment of the present application.

Fig. 3 is a partial enlarged view of fig. 2 at a.

Fig. 4 is a cross-sectional view of a pipe sealing connection according to another embodiment of the present application.

Fig. 5 is a cross-sectional view of the support tube of fig. 4.

Fig. 6 is a cross-sectional view of a pipe sealing connection according to another embodiment of the present application.

Fig. 7 is a cross-sectional view of a pipe sealing connection according to another embodiment of the present application.

Fig. 8 is a cross-sectional view of the support tube of fig. 7.

Fig. 9 is a cross-sectional view of a pipe sealing connection according to another embodiment of the present application.

Description of the reference numerals

The pipe 01 to be connected, the support pipe 1, the first pipe section 11, the second pipe section 12, the intermediate pipe section 13, the sealing structure 2, the end seal cartridge 21, the groove 21a, the seal lip 211, the leading end 212, the intermediate sleeve 22,

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper", "lower", "left", "right", "middle", etc. are used herein for convenience of description, but are not to be construed as limiting the scope of the utility model, and the relative changes or modifications are not to be construed as essential to the scope of the utility model.

It will also be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or be indirectly connected to the other element through intervening elements.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.

The utility model provides a pipeline sealing connection device which is used for pipeline sealing connection in the fields of petroleum, chemical industry, mechanical equipment and the like.

As shown in fig. 1 to 3, the pipeline sealing connection device comprises a support pipe 1 and a rubber sealing structure 2 sleeved and fixed outside the support pipe 1, wherein a through fluid channel 1a is arranged in the support pipe 1, the rubber sealing structure 2 comprises end sealing sleeves 21 positioned at two ends of the support pipe 1, the end sealing sleeves 21 are fixed at the end parts of the support pipe 1 in a gluing or hot melting mode, when connection sealing of two pipelines is needed, only the end sealing sleeves 21 at the two ends of the pipeline sealing connection device are needed to be respectively inserted into corresponding pipelines 01 to be connected, and in the process, the end sealing sleeves 21 are compressed and deformed to realize first sealing of the support pipe 1 and the pipelines 01 to be connected.

It should be noted that the outer diameter of the end sealing sleeve 21 needs to be larger than the inner diameter of the corresponding pipe 01 to be connected, so that the end sealing sleeve 21 can be closely contacted with the inner wall of the corresponding pipe 01 to be connected after being inserted into the corresponding pipe 01 to be connected, thereby ensuring good sealing effect. In the present application, the difference between the outer diameter of the end seal cartridge 21 and the inner diameter of the corresponding pipe 01 to be connected is defined as interference. The proper interference magnitude can enable the end sealing sleeve 21 and the inner hole of the corresponding pipeline 01 to be connected to form a certain pressing force, so that the end sealing sleeve 21 can be tightly attached to the inner wall of the corresponding pipeline 01 to be connected in operation to prevent fluid in the pipeline from leaking, the friction force between the end sealing sleeve 21 and the pipeline 01 to be connected can be increased, and separation of the end sealing sleeve 21 and the pipeline 01 to be connected in vibration or operation is avoided, so that the sealing reliability is ensured.

It should be noted that the selection of the interference is related to the material, working environment, etc. of the end seal cartridge 21, and is not limited thereto, and the user can select the material according to the actual situation.

Because of the interference, the end sealing sleeves 21 are not easy to insert into the corresponding pipelines 01 to be connected, in order to reduce the difficulty of inserting the end sealing sleeves 21 and improve the overall sealing performance, as shown in fig. 2 and 3, grooves 21a for forming sealing lips 211 are formed on opposite end surfaces (namely face-to-face end surfaces) of the two end sealing sleeves 21, medium cavities for containing pressure medium are formed between the two end sealing sleeves 21, so that when the end sealing sleeves 21 are inserted in place, the pressure medium in the medium cavities can exert certain pressure on the sealing lips 211, the sealing lips 211 are pressed on the inner walls of the pipelines 01 to be connected, fluid in the pipelines can be prevented from leaking out, external pollution can be prevented from entering the pipelines, bidirectional sealing is achieved, the grooves 21a are arranged to form the sealing lips 211, necessary deformation spaces can be provided in the inserting process of the end sealing sleeves 21, and the deformation spaces enable the end sealing sleeves 21 to be deformed easily when pressed, so that the end sealing sleeves 21 are inserted in place smoothly.

Therefore, the pipeline sealing connecting device can realize the connection sealing of two pipelines 01 to be connected in an inserting mode, has the advantages of convenience and rapidness in connection, and after the pipeline sealing connecting device is inserted in place, the end sealing sleeve 21 on the pipeline sealing connecting device can be compressed and deformed to realize the first sealing, meanwhile, a certain pressure is applied to the sealing lip by pressure medium arranged in the medium cavity, so that the sealing lip is pressed on the inner wall of the pipeline to be connected to realize the second sealing.

It should be noted that the pressure medium in the medium cavity may be a gas or a liquid (such as water, oil, etc.) with a certain pressure, and the pressure medium provided by the medium and high pressure environments automatically enters the medium cavity to compress the sealing lip 211 when the pipe sealing connection device is installed in the medium and high pressure environments, and of course, when the pipe sealing connection device is located in the non-medium and high pressure environments, the corresponding pressure medium may be introduced into the medium cavity after the pipe sealing connection device is installed in place to compress and seal the sealing lip 211.

In an alternative embodiment, as shown in fig. 2 and 3, the inner surface of the sealing lip 211 (i.e. the surface close to the support tube 1) comprises a stress surface 2111 extending obliquely from outside to inside in the insertion direction of the end sealing sleeve 21, so that the sealing lip 211 is more easily deformed to be pressed against the inner wall of the pipe 01 to be connected when the pressure medium presses the stress surface 2111, in this embodiment the stress surface 2111 is a curved surface or an obliquely arranged plane.

In an alternative embodiment, the outer surface of the end sealing sleeve 21 is provided with sealing convex points or sealing convex strips, the introduction of the sealing convex points or sealing convex strips can increase the tightness between the end sealing sleeve 21 and the inner wall of the pipeline 01 to be connected, so that a larger pressure is formed between the end sealing sleeve 21 and the pipeline 01 to be connected, the purpose of enhancing the sealing effect is achieved, meanwhile, the existence of the sealing convex points or the sealing convex strips can disperse the pressure, the stress concentration of the end sealing sleeve 21 is reduced, and the service life of the end sealing sleeve 21 is prolonged.

In a preferred embodiment, as shown in fig. 2, the end of the end sealing sleeve 21 away from the sealing lip 211 is a guiding end 212, and the guiding end 212 has a guiding surface extending obliquely from outside to inside along the insertion direction of the end sealing sleeve 21, and the guiding surface is a conical surface or an obliquely arranged plane.

As shown in fig. 2, the rubber sealing structure 2 comprises an intermediate sleeve 22 for connecting two end sealing sleeves 21, wherein the intermediate sleeve 22 can ensure the installation stability of the end sealing sleeves 21, the intermediate sleeve 22 is not fixedly connected with the support tube 1, or the intermediate sleeve 22 is fixed on the support tube 1 by means of gluing or hot melting and the like.

It should be noted that the end seal sleeve 21 and the intermediate sleeve 22 are separately provided or integrally formed, which is not limited thereto, and what structure is specifically adopted is determined according to the structural form of the support tube 1.

In an alternative embodiment, as shown in fig. 4 to 6, the support tube 1 is a two-section tube structure, which includes a first tube section 11 and a second tube section 12 connected to the first tube section 11, where the first tube section 11 and the second tube section 12 are both hard tubes made of hard materials such as metal, so as to ensure the support stability of the end seal sleeve 21.

It should be noted that the pipe diameters of the first pipe section 11 and the second pipe section 12 may be the same or different, which is not limited thereto, and may be set by a user according to actual situations.

It should be noted that the connection between the first pipe section 11 and the second pipe section 12 is not limited to this, for example, as shown in fig. 6, when the first pipe section 11 and the second pipe section 12 are coaxially connected, the integral rubber sealing structure 2 can be molded directly outside the support pipe 1 by an injection molding process or a compression molding process, the integral rubber sealing structure 2 can be molded first, and then the molded rubber sealing structure 2 is fixed on the support pipe 1 by gluing or hot melting, for example, when the first pipe section 11 and the second pipe section 12 are non-coaxially connected (i.e. connected at an angle or parallel offset as shown in fig. 4), the integral rubber sealing structure 2 is molded outside the support pipe 1 by an injection molding process or a compression molding process.

In an alternative embodiment, as shown in fig. 7 to 9, the support tube 1 is a three-section tube structure, which includes a first tube section 11, a second tube section 12, and a middle tube section 13 for connecting the first tube section 11 and the second tube section 12, wherein the first tube section 11 and the second tube section 12 are both hard tubes made of hard materials such as metal, so as to ensure the support stability of the end seal sleeve 21.

The intermediate pipe 13 may be a flexible pipe that can be bent at will, or may be a hard pipe made of a hard material such as metal, and is not limited thereto.

When the middle pipe section 13 is a flexible pipe, the whole pipeline sealing connection device can be bent at will through the flexible pipe to adapt to the connection sealing requirements of two pipelines 01 to be connected under different angles, and in this case, for the convenience of bending, the middle sleeve 22 and the end sealing sleeve 21 are preferably in a split structure, and the middle sleeve 22 is made of a softer rubber material (namely, made of a rubber material with lower elastic modulus).

When the intermediate pipe section 13 is a hard pipe made of a hard material such as metal, the arrangement of the first pipe section 11 and the second pipe section 12 includes, but is not limited to, the following several embodiments to meet different pipe connection requirements.

Examples

As shown in fig. 7 and 8, the center line of the first pipe section 11 and the center line of the second pipe section 12 are parallel to meet the connection requirement of two parallel pipes.

It should be noted that the inner diameter of the first pipe section 11 and the pipe diameter of the second pipe section 12 may be the same or different, which is not limited to this, and may be set by a user according to practical situations, and in order to achieve smooth installation of the end seal structure 2, the end seal sleeve 21 and the intermediate sleeve 22 may be set separately or integrally formed, which is not limited to this.

When the end seal sleeve 21 and the intermediate sleeve 22 are separately provided, the intermediate sleeve 22 and the end seal sleeve 21 may be separately mounted, and fixedly connected by means of gluing or hot melting after the mounting is completed.

Of course, the integral rubber sealing structure 2 can also be molded directly outside the support tube 1 by an injection molding process or a compression molding process.

Examples

As shown in fig. 9, the first pipe section 11 and the second pipe section 12 are coaxially arranged to meet the connection requirements of two coaxial pipes.

It should be noted that the inner diameter of the first pipe section 11 and the pipe diameter of the second pipe section 12 may be the same or different, which is not limited thereto, and may be set by a user according to actual situations. In this case, the end seal cartridge 21 and the intermediate cartridge 22 may be provided separately or integrally, and in order to reduce the number of mounting steps, the end seal cartridge 21 and the intermediate cartridge 22 are preferably provided as an integrally formed structure.

Examples

The first pipe section 11 and the second pipe section 12 are arranged at an angle to meet the pipeline connection requirements at corresponding angles.

It should be noted that the pipe diameter of the first pipe section 11 and the pipe diameter of the second pipe section 12 may be the same or different, which is not limited thereto, and may be set by a user according to actual situations. In order to achieve smooth installation of the end seal structure 2, the end seal sleeve 21 and the intermediate sleeve 22 may be provided separately or may be integrally formed, which is not limited thereto.

When the end seal sleeve 21 and the intermediate sleeve 22 are separately provided, the intermediate sleeve 22 and the end seal sleeve 21 may be separately mounted, and fixedly connected by means of gluing or hot melting after the mounting is completed.

Of course, the integral rubber sealing structure 2 can also be molded directly outside the support tube 1 by an injection molding process or a compression molding process.

In summary, the present utility model effectively overcomes the disadvantages of the prior art and has high industrial utility value.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. The pipeline sealing connection device is characterized by comprising a support pipe (1) and a rubber sealing structure (2) sleeved and fixed outside the support pipe (1), wherein a fluid channel (1 a) is arranged in the support pipe (1), the rubber sealing structure (2) comprises end sealing sleeves (21) positioned at two ends of the support pipe (1), the end sealing sleeves (21) are used for being inserted into a pipeline (01) to be connected so as to realize sealing connection between the support pipe (1) and the pipeline (01) to be connected, grooves (21 a) used for forming sealing lips (211) are formed in opposite end faces of the two end sealing sleeves (21), and a medium cavity used for accommodating pressure medium is formed between the two end sealing sleeves (21).

2. A pipe sealing connection according to claim 1, characterized in that the inner surface of the sealing lip (211) comprises a bearing surface (2111) extending obliquely from outside to inside in the direction of insertion of the end sealing sleeve (21), the sealing lip (211) being pressed against the inner wall of the pipe (01) to be connected when the pressure medium presses the bearing surface (2111).

3. A pipe sealing connection according to claim 1, characterized in that the end of the end sealing sleeve (21) remote from the sealing lip (211) is a leading end (212).

4. A pipe sealing connection according to claim 1, characterized in that the outer surface of the end sealing sleeve (21) is provided with sealing bumps or sealing ribs.

5. A pipe sealing connection according to any one of claims 1 to 4, characterized in that the rubber sealing structure (2) comprises an intermediate sleeve (22), the intermediate sleeve (22) being adapted to connect two end sealing sleeves (21).

6. A pipe sealing connection according to claim 1, characterized in that the support pipe (1) comprises a first pipe section (11) and a second pipe section (12), the first pipe section (11) and the second pipe section (12) being hard pipes.

7. A pipe sealing connection according to claim 6, characterized in that the support pipe (1) comprises an intermediate pipe section (13) for connecting the first pipe section (11) and the second pipe section (12), the intermediate pipe section (13) being a bendable flexible pipe.

8. A pipe sealing connection according to claim 6, characterized in that the support pipe (1) comprises an intermediate pipe section (13) for connecting the first pipe section (11) and the second pipe section (12), the intermediate pipe section (13) being a hard pipe, and the centre line of the first pipe section (11) being parallel to the centre line of the second pipe section (12).

9. A pipe sealing connection according to claim 8, characterized in that the first pipe section (11) is arranged coaxially with the second pipe section (12).

10. A pipe sealing connection according to claim 1, characterized in that the rubber sealing structure (2) is fixed to the support pipe (1) by means of gluing or hot-melt.