CN204647618U - A kind of engineering pipeline is slidably connected closure member - Google Patents

Abstract

The utility model provides a kind of engineering pipeline and to be slidably connected closure member, belong to pipeline field, comprise body, body comprises the outer tube be mutually slidably connected, interior pipe and the O-ring seal for sealing outer tube and interior pipe joint, and interior pipe can slide axially within the outer tube.Outer tube is equipped with retaining ring on one end outer wall of interior pipe, retaining ring is fixedly connected with outer tube, and the outside of interior pipe is arranged with slip ring, and slip ring and interior pipe are slidably connected, retaining ring is corresponding with slip ring is provided with some tapped holes, and retaining ring is connected by high-strength bolt with slip ring.The engineering pipeline that the utility model provides is slidably connected that closure member adopts can the inner and outer tubes structure of relative sliding, achieves the adjustment of tube length, be applicable to uncertain pipeline construction certain distance from operating mode, construct more convenient; And effectively prevent joint under stress to leak, ensure that construction quality.

Description

An engineering pipeline sliding connection closure

technical field

The utility model relates to the field of pipelines, in particular to an engineering pipeline sliding connection closure.

Background technique

At present, the connection and closure of concrete pipe fittings and steel pipes are mostly connected by welding or flange connection. The pipe fittings of these two kinds of connections need to determine the length of the fittings according to the engineering conditions before they can be customized. However, it is difficult to determine the exact fitting length in engineering applications. Therefore, During the construction process, accessories often undergo on-site cutting or welding and lengthening. The construction site needs to be equipped with generator sets and flame gas cutting equipment, which is time-consuming and labor-intensive. At the same time, it brings inconvenience to the construction of the project, and the welding of the steel plate will cause deformation of the pipe. Thereby it is easy to cause water leakage at the pipeline interface, and it is difficult to guarantee the quality of the project.

Utility model content

The utility model provides a sliding connection closure for engineering pipelines, aiming to improve the above problems.

The utility model is achieved in that:

A sliding connection closure for engineering pipelines, comprising a pipe body, the pipe body includes an outer pipe, an inner pipe that are slidably connected to each other, and a sealing rubber ring for sealing the joint between the outer pipe and the inner pipe. The inner tube can slide axially within the outer tube;

A fixed ring is provided on the outer wall of the outer tube close to the end of the inner tube, and the fixed ring is fixedly connected with the outer tube. The inner tube is slidingly connected, the fixing ring and the sliding ring are provided with several threaded holes correspondingly, and the fixing ring and the sliding ring are connected by high-strength bolts;

When the high-strength bolts are tightened, the sliding ring and the fixing ring press the sealing rubber ring on the side of the sliding ring close to the fixing ring, the end surface of the outer tube close to the sliding ring and The joint between the outer tube and the inner tube is sealed between the outer walls of the inner tube.

Further, a slope for pressing the sealing rubber ring against the outer wall of the inner pipe is provided on the side of the sliding ring close to the sealing rubber ring.

When the high-strength bolts are tightened, the inclined force on the sliding ring exerts force on the sealing rubber ring. Under the action of the oblique force, the sealing rubber ring can be better tightly connected to the outer wall of the inner tube and the end surface of the outer tube close to the sliding ring. fit to more effectively seal the junction of the outer tube to the inner tube.

Further, the side surface of the fixed ring close to the slide ring is flush with the end surface of the outer tube close to the slide ring.

Even if the thickness of the sealing rubber ring is greater than the wall thickness of the outer tube, when the sliding ring and the fixed ring are locked by high-strength bolts, the sealing rubber ring can be pressed against the side of the sliding ring close to the fixed ring and the end surface of the outer tube close to the sliding ring And between the outer wall of the inner tube, so that the connection between the outer tube and the inner tube is sealed. Moreover, this structure with flush ends is easier to process, facilitates the tightening of high-strength bolts, saves the length of high-strength bolts, reduces the shear force of high-strength bolts, and thus prolongs the service life of high-strength bolts.

Further, the inner wall of the outer tube near the end of the inner tube and the outer wall of the inner tube near the outer tube are provided with wear-resistant anti-corrosion coatings.

By setting the wear-resistant anti-corrosion coating, when the outer tube and the inner tube slide relatively, the connection between the outer tube and the inner tube is not easy to be worn, and the anti-corrosion performance is improved, thereby prolonging the service life.

Further, a socket ring and a socket ring are respectively provided at both ends of the pipe body, and the socket ring and the socket ring are respectively connected to the pipe body through transition rings.

When two adjacent pipe bodies are connected, the socket ring of one of the pipe bodies is inserted into the socket ring of the adjacent pipe body, so that the two pipe bodies can be well connected. The transition ring acts as a transition connection.

Further, both the inner tube and the outer tube are one, the socket ring is set at the end of the inner tube away from the outer tube, and the socket ring is set at the end of the outer tube far away from the inner tube one end.

One inner tube and one outer tube, which can be called a two-piece closure structure. By adjusting the butt length of the inner tube and the outer tube, the overall length of the tube body can be adjusted. It is suitable for one end of the tube body where the position is fixed and the other end is for construction. situation.

Further, the inner tube includes a first inner tube and a second inner tube, the socket ring is set on the end of the first inner tube away from the outer tube, and the socket ring is set on the second inner tube an end of the tube remote from the outer tube;

Both ends of the outer tube are respectively provided with a first fixing ring and a second fixing ring, the first inner tube is overcoated with a first sliding ring, and the second inner tube is overcoated with a second sliding ring. The first fixing ring is connected to the first sliding ring by a first high-strength bolt, and the second fixing ring is connected to the second sliding ring by a second high-strength bolt;

A first sealing rubber ring for sealing the joint between the first inner tube and the outer tube is arranged between the first fixing ring and the first sliding ring, and the second fixing ring and the first sliding ring are connected to each other. A second sealing rubber ring for sealing the joint between the second inner tube and the outer tube is arranged between the two sliding rings.

There are two inner tubes and one outer tube, which can be called a three-piece closure structure, by adjusting the butt length of the first inner tube and outer tube, the butt length of the second inner tube and outer tube, or adjusting the two butt joints at the same time The overall length of the pipe body can be adjusted, which is especially suitable for the construction situation where both ends of the pipe body need to be adjusted in length.

Further, the transition ring protrudes from the pipe body along its radial direction. The transition ring prevents the slip ring from slipping out of the tube body.

Further, the threaded holes of the fixed ring and the threaded holes of the sliding ring are evenly distributed along the circumferential direction. Make the fastening force of the high-strength bolts evenly distributed, and avoid the uneven compression of the sealing rubber ring due to the uneven distribution of the fastening force, which will cause water leakage at the loosely compressed part of the sealing rubber ring.

Further, the outer pipe is an outer-layer steel pipe, the inner pipe is an inner-layer steel pipe, the fixed ring is a fixed steel plate ring, and the sliding ring is a sliding steel plate ring.

The outer tube, the inner tube, the fixing ring and the sliding ring are all made of steel, which can meet the requirements of good work, and the material is easy to obtain and the cost is low.

The beneficial effect of the engineering pipeline sliding connection closure provided by the utility model is that the engineering pipeline sliding connection closure obtained by the utility model through the above design can adjust the outer tube and the outer tube through the relative sliding of the inner tube and the outer tube during pipeline construction. The butt length of the inner pipe can be adjusted to adjust the overall length of the pipe body, which is suitable for the working conditions where the distance between the pipeline construction sections is uncertain; Tighten the junction of the outer tube and the inner tube to seal.

Therefore, the engineering pipeline sliding connection closure provided by the utility model realizes the adjustment of the length of the pipe body due to the relatively sliding inner tube and outer tube structure, and is suitable for working conditions where the distance between pipeline construction sections is uncertain, and solves the problem of Problems such as the connection between engineering pipeline fittings and the closed connection between various pipeline construction sections, especially to solve the complex engineering conditions and the inability to accurately measure the distance between pipeline construction sections, and to solve the difficulties that the construction site needs to be equipped with generator sets and flame gas cutting equipment , the construction is more convenient and fast; and the sliding ring and the fixed ring are used to compress the sealing rubber ring, so that the sealing rubber ring can well seal the joint between the outer pipe and the inner pipe, effectively preventing water leakage at the joint under pressure and ensuring engineering quality.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following drawings will be briefly introduced in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained according to these drawings without creative work.

Fig. 1 is a schematic structural view of the engineering pipeline sliding connection closure provided by the first embodiment of the present invention;

Fig. 2 is a schematic structural view of the engineering pipeline sliding connection closure provided by the second embodiment of the present invention;

Fig. 3 is a partial enlarged view of the engineering pipeline sliding connection closure provided by the second embodiment of the utility model at a in Fig. 2;

Fig. 4 is a cross-sectional view along line A-A in Fig. 2 of the engineering pipeline sliding connection closure provided by the second embodiment of the present invention;

Fig. 5 is a schematic structural view of the engineering pipeline sliding connection closure provided by the third embodiment of the present invention.

The marks in the figure are:

Pipe body 101; outer pipe 102; inner pipe 103; sealing rubber ring 104; fixed ring 105; sliding ring 106; high-strength bolts 107; wear-resistant anti-corrosion coating 108; socket ring 109; Inclined surface 112; first inner tube 113; second inner tube 114; first fixing ring 115; second fixing ring 116; first sliding ring 117; second sliding ring 118; first high-strength bolt 119; second high-strength bolt 120 ; The first sealing rubber ring 121 ; the second sealing rubber ring 122 .

Detailed ways

At present, the connection and closure of concrete pipe fittings and steel pipes are mostly connected by welding or flange connection. The pipe fittings of these two kinds of connections need to determine the length of the fittings according to the engineering conditions before they can be customized. However, it is difficult to determine the exact fitting length in engineering applications. Therefore, During the construction process, accessories often undergo on-site cutting or welding and lengthening. The construction site needs to be equipped with generator sets and flame gas cutting equipment, which is time-consuming and labor-intensive. At the same time, it brings inconvenience to the construction of the project, and the welding of the steel plate will cause deformation of the pipe. Thereby it is easy to cause water leakage at the pipeline interface, and it is difficult to guarantee the quality of the project.

Those skilled in the art have been looking for a tool or method to improve this problem for a long time.

In view of this, the designer of the utility model designed a sliding connection closure for engineering pipelines through long-term exploration and attempts, as well as many experiments and efforts, and designed a sliding connection closure for engineering pipelines. Due to the relatively slidable inner tube 103 and The structure of the outer pipe 102 realizes the adjustment of the length of the pipe body 101, and is suitable for working conditions where the distance between pipeline construction sections is uncertain; and the sliding ring 106 and the fixed ring 105 are used to compress the sealing rubber ring 104, so that the sealing rubber ring 104 can be quickly The connection between the outer pipe 102 and the inner pipe 103 is well sealed, which effectively prevents water leakage at the connection under pressure and ensures the quality of the project.

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

first embodiment

Referring to Fig. 1, the engineering pipeline sliding connection closure provided in this embodiment includes a pipe body 101, and the pipe body 101 includes an outer pipe 102, an inner pipe 103 that are slidably connected to each other, and is used to carry out the joint at the joint of the outer pipe 102 and the inner pipe 103. With the sealing rubber ring 104 , the inner tube 103 can slide axially in the outer tube 102 .

The outer wall of the outer tube 102 near the end of the inner tube 103 is provided with a fixed ring 105, the fixed ring 105 is fixedly connected with the outer tube 102, the outer side of the inner tube 103 is provided with a sliding ring 106, and the sliding ring 106 is slidably connected with the inner tube 103, The fixing ring 105 and the sliding ring 106 are provided with several threaded holes correspondingly, and the fixing ring 105 and the sliding ring 106 are connected by high-strength bolts 107 .

When the high-strength bolt 107 is tightened, the sliding ring 106 and the fixing ring 105 will compress the sealing rubber ring 104 between the side of the sliding ring 106 close to the fixing ring 105, the end surface of the outer tube 102 close to the sliding ring 106 and the outer wall of the inner tube 103, The junction of the outer tube 102 and the inner tube 103 is sealed.

It should be understood that the thickness of the sealing rubber ring 104 may be greater than the wall thickness of the outer tube 102, or less than or equal to the wall thickness of the outer tube 102, as long as it can play a role of complete sealing. The side of the side of the fixed ring 105 close to the slide ring 106 can be flush with the end face of the end of the outer tube 102 close to the slide ring 106, or not. When the sliding ring 106 and the fixing ring 105 press the sealing rubber ring 104 tightly, the sealing rubber ring 104 closes the gap at the junction of the outer tube 102 and the inner tube 103 .

During pipeline construction, through the relative sliding of the inner tube 103 and the outer tube 102, the butt length of the outer tube 102 and the inner tube 103 is adjusted, thereby adjusting the overall length of the pipe body 101, which is suitable for working conditions where the distance between pipeline construction sections is uncertain When the pipe body 101 is adjusted to a suitable length, the high-strength bolt 107 is tightened, and the sliding ring 106 and the fixed ring 105 compress the sealing rubber ring 104, so that the joint between the outer pipe 102 and the inner pipe 103 is sealed.

Therefore, the engineering pipeline sliding connection closure provided in this embodiment adopts the relatively slidable inner tube 103 and outer tube 102 structure, which realizes the adjustment of the length of the tube body 101, and is suitable for working conditions where the distance between pipeline construction sections is uncertain. It solves the problems of connection between pipe fittings in pipeline engineering and closed connection between various pipeline construction sections, especially solves the complex engineering conditions and cannot accurately measure the distance between pipeline construction sections, and solves the need to equip generator sets and flame gas cutting on the construction site The equipment is difficult, and the construction is more convenient and quick; and the sliding ring 106 and the fixed ring 105 are used to compress the sealing rubber ring 104, so that the sealing rubber ring 104 can well seal the joint between the outer tube 102 and the inner tube 103, effectively preventing In order to prevent water leakage at the joint under pressure, the quality of the project is guaranteed.

second embodiment

Please refer to Fig. 2, the engineering pipeline sliding connection closure provided by this embodiment, its basic structure and principle and the technical effect produced are the same as the first embodiment, for a brief description, the part not mentioned in this embodiment can be Refer to the corresponding content in the first embodiment.

Please refer to FIG. 2 and FIG. 3 , the side of the sliding ring 106 close to the sealing rubber ring 104 is provided with an inclined surface 112 for pressing the sealing rubber ring 104 against the outer wall of the inner tube 103 .

When the high-strength bolt 107 is tightened, the inclined surface 112 on the sliding ring 106 exerts an oblique force on the sealing rubber ring 104. The end surface of the outer tube 102 close to the sliding ring 106 is closely attached to effectively avoid the radial gap between the sealing rubber ring 104 and the outer wall of the inner tube 103 , thereby more effectively sealing the connection between the outer tube 102 and the inner tube 103 .

Please refer to FIG. 2 and FIG. 3 , the side of the fixing ring 105 close to the sliding ring 106 is flush with the end surface of the outer tube 102 close to the sliding ring 106 . Even if the thickness of the sealing rubber ring 104 is greater than the wall thickness of the outer tube 102, when the sliding ring 106 and the fixed ring 105 are locked by high-strength bolts 107, the sealing rubber ring 104 can be pressed against the side of the sliding ring 106 close to the fixing ring 105 , Between the end surface of the outer tube 102 close to the sliding ring 106 and the outer wall of the inner tube 103 , so that the connection between the outer tube 102 and the inner tube 103 is sealed. Moreover, this structure with flush ends is easier to process, facilitates the tightening of the high-strength bolts 107 , saves the length of the high-strength bolts 107 , reduces the shear force of the high-strength bolts 107 , thereby prolonging the service life of the high-strength bolts 107 .

Referring to FIG. 3 , the inner wall of the outer tube 102 near the inner tube 103 and the outer wall of the inner tube 103 near the outer tube 102 are provided with a wear-resistant anti-corrosion coating 108 .

By providing the wear-resistant anti-corrosion coating 108, when the outer tube 102 and the inner tube 103 slide relative to each other, the connection between the outer tube 102 and the inner tube 103 is not easy to be worn, and the anti-corrosion performance is improved, thereby prolonging the service life.

Referring to FIG. 2 , a socket ring 109 and a socket ring 110 are respectively provided at both ends of the pipe body 101 , and the socket ring 109 and the socket ring 110 are respectively connected to the pipe body 101 through a transition ring 111 .

When connecting two adjacent pipe bodies 101 , the socket ring 110 of one pipe body 101 is inserted into the socket ring 109 of the adjacent pipe body 101 , so that the two pipe bodies 101 can be connected well. The transition ring 111 functions as a transition connection.

Please refer to Fig. 2, in this embodiment, the inner tube 103 and the outer tube 102 are one, the socket ring 109 is arranged on the end of the inner tube 103 away from the outer tube 102, and the socket ring 110 is arranged on the outer tube 102 away from the inner tube 103 one end. The tube with socket ring 109 may be referred to as a socket stub and the tube with socket ring 110 may be referred to as a socket stub.

One inner tube 103 and one outer tube 102, which can be called a two-piece closure structure. By adjusting the butt joint length of the inner tube 103 and the outer tube 102, the overall length of the tube body 101 can be adjusted, and it is suitable for one end of the tube body 101 to be fixed. , the situation where construction is in progress at the other end.

Please refer to FIG. 2 , the transition ring 111 protrudes from the tube body 101 along its radial direction. The transition ring 111 can prevent the sliding ring 106 from slipping out of the tube body 101 .

Please refer to FIG. 4 , the threaded holes of the fixing ring 105 and the threaded holes of the sliding ring 106 are evenly distributed along the circumferential direction. Make the high-strength bolts 107 evenly distributed along the circumferential direction, then the fastening force of the high-strength bolts 107 is evenly distributed, avoiding uneven compression of the sealing rubber ring 104 due to uneven distribution of fastening force, resulting in looser compression of the sealing rubber ring 104 water leakage.

The high-strength bolt 107 can be designed according to the type and arrangement quantity of the high-strength bolt 107 according to the pipeline pressure. For example, the number of high-strength bolts 107 may be eight, ten or twelve.

The outer pipe 102 is an outer steel pipe, the inner pipe 103 is an inner steel pipe, the fixed ring 105 is a fixed steel plate ring, and the sliding ring 106 is a sliding steel plate ring. The outer tube 102, the inner tube 103, the fixing ring 105 and the sliding ring 106 are all made of steel, which can meet the working requirements well, and the material is easy to obtain and the cost is low.

Referring to Figures 2 to 4, the manufacturing process of the engineering pipeline sliding connection closure provided in this embodiment is as follows:

1. Make the socket ring 109 and the socket ring 110: Weld the steel plates that meet the requirements into a ring according to the manufacturing process requirements. It is required that the welding slag around the butt weld seam and the surrounding must be cleaned and ground.

2. Assembling and welding of socket short pipe and socket short pipe: assemble and weld the qualified socket ring 109, transition ring 111, and inner pipe 103 (made by steel plate coil welding or spiral welded pipe cutting according to the designed size) to form a socket For the short pipe, the qualified socket ring 110, transition ring 111, and outer pipe 102 (made of steel plate coil welding or spiral welded pipe cut according to the design size) are assembled and welded to form a socket short pipe. Weld slag must be removed and ground smooth.

3. Grinding and anti-corrosion at the interface: Grind the butt joints of short socket pipes and short socket pipes made according to the requirements to remove oil, scale, dirt, etc. on the surface of the steel plate, and then apply wear-resistant anti-corrosion paint.

4. Assemble the sliding connection seal (two-piece):

After the anti-corrosion paint film is hard-dried, assemble the sliding steel plate rings made according to the design requirements on the short socket pipe or the short socket pipe respectively, and weld the fixed steel plate ring made according to the design requirements on another short socket pipe or short socket pipe. At the free end of the pipe, put the sealing rubber ring 104 on the short socket pipe in advance, and then insert the free end of the short socket pipe into the short socket pipe according to the design requirements for docking. The fixed position can be adjusted by adjusting the length of the docking. When the short pipe and socket short pipe are docked and adjusted to the required size, move the sealing rubber ring 104 to the joint, and then connect the sliding steel plate ring and the fixed steel plate ring with high-strength bolts 107, and the sliding steel plate ring moves and compresses the sealing rubber ring 104 to realize the pressure. seal.

third embodiment

Please refer to Fig. 5, the difference between the engineering pipeline sliding connection closure provided in this embodiment and the engineering pipeline sliding connection closure provided in the second embodiment is that in this embodiment, there are two inner tubes 103 and one outer tube 102 .

Please refer to Fig. 5, specifically, the inner tube 103 includes a first inner tube 113 and a second inner tube 114, the socket ring 109 is arranged on the end of the first inner tube 113 away from the outer tube 102, and the socket ring 110 is arranged on the second The end of the inner tube 114 is remote from the outer tube 102 .

Both ends of the outer tube 102 are respectively provided with a first fixed ring 115 and a second fixed ring 116, the first inner tube 113 is covered with a first sliding ring 117, the second inner tube 114 is covered with a second sliding ring 118, and the second inner tube 114 is covered with a second sliding ring 118. A fixed ring 115 is connected to the first sliding ring 117 by a first high-strength bolt 119 , and the second fixed ring 116 is connected to the second sliding ring by a second high-strength bolt 120 .

Between the first fixed ring 115 and the first sliding ring 117, a first sealing rubber ring 121 for sealing the junction of the first inner tube 113 and the outer tube 102 is arranged, and between the second fixing ring 116 and the second sliding ring 118 A second sealing rubber ring 122 is provided for sealing the joint between the second inner tube 114 and the outer tube 102 .

There are two inner tubes 103 and one outer tube 102, which can be called a three-piece closure structure. By adjusting the butt length of the first inner tube 113 and the outer tube 102, the butt length of the second inner tube 114 and the outer tube 102 Alternatively, by adjusting the lengths of the two joints at the same time, the overall length of the pipe body 101 can be adjusted, which is especially suitable for the construction situation where both ends of the pipe body 101 need to be adjusted in length.

The manufacturing process of the engineering pipeline sliding connection closure provided in this embodiment is different from the manufacturing process of the engineering pipeline sliding connection closure provided in the second embodiment, specifically, the steps of assembling the sliding connection sealing member are three-piece manufacturing step.

Referring to Figure 5, assemble the slip joint seal (three-piece):

After the anti-corrosion paint film is hard-dried, the sliding steel plate rings made according to the design requirements are respectively assembled on the socket short pipe and the socket short pipe, and the fixed steel plate rings made according to the design requirements are respectively welded to the outer pipe 102 made according to the technical requirements. At both ends, set the sealing rubber ring 104 on the short socket tube and the short socket tube respectively in advance, and then connect the two ends of the outer tube 102 with the short socket tube and the short socket tube respectively according to the design requirements, and the fixed positions can be adjusted separately The butt length of the two ends of the outer tube 102 is adjusted. When the outer tube 102 is docked with the first inner tube 113 or the second inner tube 114 and adjusted to the required size, the first sealing rubber ring 121 or the second sealing rubber ring 122 is moved to the docking position. Then use the first high-strength bolt 119 or the second high-strength bolt 120 to respectively connect the first sliding ring 117 to the first fixed ring 115, and the second sliding ring 118 to the second fixed ring 116. The first sliding ring 117 moves and compresses the first The sealing rubber ring 121 and the second sliding ring 118 move and compress the second sealing rubber ring 122 to realize pressure sealing.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", Orientation indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the referred equipment or elements must have a specific orientation, be constructed and operated in a specific orientation , so it cannot be interpreted as a limitation of the present utility model.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection, or integration; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "below" a second feature may include direct contact between the first and second features, and may also include the first and second features being in direct contact with each other. The features are not in direct contact but through another feature between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. An engineering pipeline sliding connection closure, characterized in that it includes a pipe body, the pipe body includes an outer pipe and an inner pipe that are slidably connected to each other and are used to seal the joint between the outer pipe and the inner pipe A sealing rubber ring, the inner tube can slide axially in the outer tube; A fixed ring is provided on the outer wall of the outer tube close to the end of the inner tube, and the fixed ring is fixedly connected with the outer tube. The inner tube is slidingly connected, the fixing ring and the sliding ring are provided with several threaded holes correspondingly, and the fixing ring and the sliding ring are connected by high-strength bolts; When the high-strength bolts are tightened, the sliding ring and the fixing ring press the sealing rubber ring on the side of the sliding ring close to the fixing ring, the end surface of the outer tube close to the sliding ring and The joint between the outer tube and the inner tube is sealed between the outer walls of the inner tube. 2. The engineering pipeline sliding connection closure according to claim 1, characterized in that, the side of the sliding ring close to the sealing rubber ring is provided with a ring for pressing the sealing rubber ring against the outer wall of the inner pipe slope. 3 . The sliding connection closure for engineering pipelines according to claim 1 , wherein the side surface of the fixing ring close to the sliding ring is flush with the end surface of the outer pipe close to the sliding ring. 4 . 4. The engineering pipeline sliding connection closure according to claim 1, characterized in that, the inner wall of the end of the outer tube close to the inner tube, and the outer wall of the end of the inner tube close to the outer tube are provided with Abrasion resistant anti-corrosion coating. 5. The engineering pipeline sliding connection closure according to claim 1, characterized in that, the two ends of the pipe body are respectively provided with a socket ring and a socket ring, and the socket ring and the socket ring pass through the transition ring respectively. A ring is attached to the body. 6. The engineering pipeline sliding connection closure according to claim 5, characterized in that, the inner tube and the outer tube are one, and the socket ring is arranged at a position where the inner tube is far away from the outer tube. At one end, the socket ring is disposed at the end of the outer tube away from the inner tube. 7. The engineering pipeline sliding connection closure according to claim 5, characterized in that, the inner tube comprises a first inner tube and a second inner tube, and the socket ring is arranged at a distance from the first inner tube to the One end of the outer tube, the socket ring is arranged at the end of the second inner tube away from the outer tube; Both ends of the outer tube are respectively provided with a first fixing ring and a second fixing ring, the first inner tube is overcoated with a first sliding ring, and the second inner tube is overcoated with a second sliding ring. The first fixing ring is connected to the first sliding ring by a first high-strength bolt, and the second fixing ring is connected to the second sliding ring by a second high-strength bolt; A first sealing rubber ring for sealing the connection between the first inner tube and the outer tube is arranged between the first fixing ring and the first sliding ring, and the second fixing ring and the first sliding ring are connected to each other. A second sealing rubber ring for sealing the joint between the second inner tube and the outer tube is arranged between the two sliding rings. 8. The sliding connection closure for engineering pipelines according to claim 5, wherein the transition ring protrudes from the pipe body along its radial direction. 9 . The sliding connection closure for engineering pipelines according to claim 1 , wherein the threaded holes of the fixing ring and the threaded holes of the sliding ring are evenly distributed along the circumferential direction. 10. The engineering pipeline sliding connection closure according to claim 1, wherein the outer pipe is an outer steel pipe, the inner pipe is an inner steel pipe, the fixed ring is a fixed steel plate ring, and the sliding The ring is a sliding steel ring.