CN111425691A

CN111425691A - Pipeline sealing device and pipeline system

Info

Publication number: CN111425691A
Application number: CN202010315658.7A
Authority: CN
Inventors: 王洪波; 于光佐; 乔旭光; 史建文
Original assignee: Shenhua Guoneng Group Corp Ltd; Shanxi Luneng Hequ Power Generation Co Ltd
Current assignee: Shenhua Guoneng Group Corp Ltd; Shanxi Luneng Hequ Power Generation Co Ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2020-07-17
Anticipated expiration: 2040-04-20
Also published as: CN111425691B

Abstract

The invention discloses a pipeline sealing device and a pipeline system, wherein the pipeline sealing device comprises a connecting rod, a driving disc, a first pressure plate, a second pressure plate and an elastic sealing part; the driving-disc, first pressure disk and second pressure disk suit are in proper order in the connecting rod, driving-disc and first pressure disk all with connecting rod sliding connection, second pressure disk and connecting rod fixed connection, the axis direction that the connecting rod all can be followed to driving-disc and first pressure disk slides, elastic sealing portion sets up between first pressure disk and second pressure disk, the direction of the first pressure disk of driving-disc drive towards the second pressure disk slides, first pressure disk and second pressure disk extrusion elastic sealing portion warp the inflation, elastic sealing portion be located warp under the inflation state can with pipe-line system's pipe inner wall sealing connection. The scheme can solve the problem that the pipeline system is easy to damage in the process of cleaning the pipeline system.

Description

Pipeline sealing device and pipeline system

Technical Field

The invention relates to the technical field of pipeline sealing, in particular to a pipeline sealing device and a pipeline system.

Background

The thermal power transmission of the thermal power circulation system of the thermal power plant mainly passes through a pipeline system, and impurities such as water scales and the like are often accumulated in the pipeline system, so that the thermal power transmission is influenced, and therefore the impurities attached to the pipe wall need to be cleaned.

Taking the high-pressure heater as an example, impurities are attached to the pipe wall of the pipeline inside the high-pressure heater, and when the pipeline of the high-pressure heater is cleaned, the inlet and outlet ports of the pipeline of the high-pressure heater need to be sealed and plugged, so that cleaning liquid for cleaning the pipeline is prevented from entering other systems. The sealing plugging of the pipeline can be realized by welding plugging plates at the inlet and outlet ports of the pipeline, so that the cleaning solution is prevented from flowing into other system pipelines.

The business turn over port on pipeline is when the welding closure plate, because the space of pipeline is less, consequently makes operating personnel operate inconveniently, and the welding degree of difficulty is great, and simultaneously, welded closure plate need demolish after wasing the completion, destroys the pipeline easily when demolising the closure plate to cause the pipeline to damage, in addition, cause metal residue to leave over in the pipeline easily when demolising the closure plate, thereby probably lead to high temperature heater to damage.

Of course, other pipelines have such problems when cleaned, which easily causes damage to the pipeline system.

Disclosure of Invention

The invention discloses a pipeline sealing device and a pipeline system, and aims to solve the problem that the pipeline system is easy to damage in the process of cleaning the pipeline system.

In order to solve the problems, the invention adopts the following technical scheme:

a pipeline sealing device is applied to a pipeline system and comprises a connecting rod, a driving disc, a first pressure plate, a second pressure plate and an elastic sealing part;

the driving disc, the first pressure plate and the second pressure plate are sequentially sleeved on the connecting rod, the driving disc and the first pressure plate are both in sliding connection with the connecting rod, the second pressure plate is fixedly connected with the connecting rod, the driving disc and the first pressure plate can slide along the axis direction of the connecting rod, the elastic sealing portion is arranged between the first pressure plate and the second pressure plate, the driving disc drives the first pressure plate to slide towards the direction of the second pressure plate, the first pressure plate and the second pressure plate extrude the elastic sealing portion to deform and expand, and the elastic sealing portion can be in a deformation expansion state and can be in sealing connection with the inner wall of the pipeline system.

A pipeline system comprises the pipeline sealing device.

The technical scheme adopted by the invention can achieve the following beneficial effects:

in the sealing device disclosed by the invention, the driving disc can drive the first pressure plate to move towards the direction of the second pressure plate, the first pressure plate and the second pressure plate extrude the elastic sealing part arranged between the first pressure plate and the second pressure plate, the elastic sealing part expands and deforms after being extruded, and the elastic sealing part interferes with the inner wall of the pipeline when the elastic sealing part expands to a certain degree, so that the elastic sealing part has a sealing effect on the port of the pipeline, and the cleaning fluid in the pipeline is prevented from leaking or flowing into other systems. When the washing is accomplished, the driving-disc can drive first pressure disk and remove along the direction that deviates from the second pressure disk to make elastic sealing portion not atress, thereby make elastic sealing portion resume elastic deformation, and then can follow the interior dismantlement of port sealing device of pipeline in the pipeline.

In this scheme, pipeline sealing device need not with the port welding of pipeline, and operating personnel only need drive-disc motion can accomplish the sealed of pipeline, and required operating space is less, consequently makes operating personnel installation convenient operation. Simultaneously, when the pipeline sealing device is dismantled, only need remove the power of exerting force to elastic sealing portion and both can make elastic sealing portion resume deformation to make the effect of no power between pipeline sealing device and the pipeline, thereby can take out pipeline sealing device from the pipeline, pipeline sealing device can not cause the damage to the inner wall of pipeline when demolising, and then be difficult to destroy pipe-line system. In addition, the pipeline sealing device is not easy to generate metal residues in the installation and disassembly processes, so that the safety of a pipeline system is higher.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a pipeline sealing device disclosed in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another pipeline sealing device according to an embodiment of the present invention;

fig. 3 is a front view of a driving plate in the pipeline sealing device according to the embodiment of the present invention;

FIG. 4 is a side view of a drive plate in the line sealing apparatus according to the present disclosure;

fig. 5 is a front view of a first platen in the pipe sealing apparatus according to the embodiment of the present invention;

FIG. 6 is a side view of a first platen of the line sealing apparatus according to the embodiment of the present invention;

fig. 7 is a front view of a second platen in the pipe sealing apparatus according to the embodiment of the present invention;

FIG. 8 is a side view of a second platen in the line sealing apparatus disclosed in an embodiment of the present invention;

fig. 9 is a front view of a third platen in the pipe sealing apparatus according to the embodiment of the present invention;

FIG. 10 is a side view of a third platen in the line sealing apparatus disclosed in an embodiment of the present invention;

fig. 11 is a front view of a fixing member in the pipe sealing device according to the embodiment of the present invention.

Description of reference numerals:

100-connecting rod, 110-first thread section, 120-second thread section,

200-a first pressing plate, 210-a first accommodating groove, 220-a second positioning projection,

300-a second pressing plate, 310-a second accommodating groove, 320-a first positioning bulge,

400-a third pressing plate, 410-an annular bulge,

500-fixing component, 510-cylinder, 520-positioning screw,

610-a first limit nut, 620-a second limit nut,

700-driving disc, 710-lead screw sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 11, an embodiment of the present invention discloses a pipeline sealing device, which is applied to a pipeline system and can seal and seal a port of a pipeline of the pipeline system. When the pipeline sealing device works, at least part of the pipeline sealing device is arranged in the pipeline. The pipe sealing device includes a connecting rod 100, a driving disk 700, a first pressure plate 200, a second pressure plate 300, and an elastic sealing portion.

As shown in fig. 2, the driving disc 700, the first pressure plate 200 and the second pressure plate 300 are sequentially sleeved on the connecting rod 100, and both the driving disc 700 and the first pressure plate 200 are slidably connected with the connecting rod 100. The second pressure plate 300 is fixedly connected to the connecting rod 100. The driving disc 700 and the first pressure plate 200 can slide along the axial direction of the connecting rod 100, the elastic sealing portion is arranged between the first pressure plate 200 and the second pressure plate 300, the driving disc 700 drives the first pressure plate 200 to slide towards the second pressure plate 300, the first pressure plate 200 and the second pressure plate 300 extrude the elastic sealing portion to deform and expand, and the elastic sealing portion can be in sealing connection with the inner wall of the pipeline system in a deformation and expansion state. Alternatively, the specific shape and size of the drive plate 700, first platen 200 and second platen 300 may be selected based on the specific shape and diameter of the piping system.

In the specific operation process, drive disc 700 can drive first pressure disk 200 and move towards the direction of second pressure disk 300, first pressure disk 200 and the elasticity sealing that second pressure disk 300 extrusion set up between first pressure disk 200 and second pressure disk 300, the expansion deformation takes place after the elasticity sealing receives the extrusion, when the elasticity sealing expands to certain extent, the elasticity sealing interferes with pipeline inner wall, thereby make the elasticity sealing play a sealing role to the pipeline, prevent that the washing liquid in the pipeline from revealing or flowing into other systems. When the cleaning is completed, the driving disc 700 may drive the first platen 200 to move in a direction away from the second platen 300, so that the elastic sealing portion is not stressed, and thus the elastic sealing portion recovers elastic deformation, and the pipeline sealing device may be removed from the port of the pipeline. Of course, the line sealing device may be used not only to seal the ports of the pipe, but also to seal the interior of the pipe.

Alternatively, the movement pattern of the driving disc 700 may be a combination of movement and rotation, and the specific movement pattern of the driving disc 700 is not limited herein. When the resilient seal is in sealing engagement with the inner wall of the duct, the position of the drive disc 700 needs to be fixed to prevent the resilient seal from rebounding. The connecting rod 100 can be provided with a jackscrew hole, and when the driving disk 700 makes the elastic sealing part and the inner wall of the pipeline in sealing fit, the jackscrew can be screwed into the jackscrew hole, so that the jackscrew tightly pushes the driving disk 700 to prevent the driving disk 700 from moving.

In the embodiment disclosed by the invention, the pipeline sealing device does not need to be welded with a port of a pipeline, an operator only needs to control the driving disc 700 to move to complete the sealing of the pipeline, and the required operation space is small, so that the installation and operation of the operator are convenient. Meanwhile, when the pipeline sealing device is disassembled, the elastic sealing part can be restored to deform only by removing the applied acting force to the elastic sealing part, so that no acting force exists between the pipeline sealing device and the pipeline, the pipeline sealing device can be taken out from the pipeline, the pipeline sealing device cannot damage the inner wall of the pipeline when being disassembled, and the pipeline system is not easy to damage. In addition, the pipeline sealing device is not easy to generate metal residues in the installation and disassembly processes, so that the safety of a pipeline system is higher.

In the embodiment disclosed by the invention, the pipeline sealing device and the pipeline do not need to be welded, so that the pipeline sealing device is convenient to install and disassemble.

In the background art, the pipeline is sealed by welding the plugging plate, and the sealing performance between the plugging plate and the pipeline is poor. In the embodiment of the invention, the shape of the elastic sealing part can be matched with the inner wall of the pipeline, so that the elastic sealing part is in closer contact with the inner wall of the pipeline, and the sealing performance of the pipeline is better.

Alternatively, the elastic sealing part can be made of sealing foam, sealing rubber, sealing silica gel and other materials, and of course, the material for making the elastic sealing part can also be flexibly selected according to the corrosivity of the cleaning solution, for example, when the cleaning solution is also an acidic cleaning solution, the elastic sealing part can be made of an acid-resistant material; when the cleaning liquid is an alkaline cleaning liquid, the elastic sealing part can be made of an alkaline-resistant material. Since the second platen 300 may come into contact with the cleaning liquid, the second platen 300 may be subjected to a corrosion-resistant treatment such as surface treatment such as plating, painting, or the like.

In order to further improve the sealing performance of the pipeline sealing device. In an alternative embodiment, the pipeline sealing device disclosed in the embodiment of the present invention may further include a third pressure plate 400, the third pressure plate 400 is slidably disposed on the connecting rod 100, and the third pressure plate 400 is sleeved on the connecting rod 100. The third platen 400 is disposed between the first platen 200 and the second platen 300.

The elastic sealing part may include a first elastic sealing part and a second elastic sealing part, the first elastic sealing part is disposed between the first pressure plate 200 and the third pressure plate 400, the second elastic sealing part is disposed between the third pressure plate 400 and the second pressure plate 300, the driving disc 700 may drive the first pressure plate 200 to slide toward the third pressure plate 400, the first pressure plate 200 may drive the third pressure plate 400 to move toward the second pressure plate 300, the first pressure plate 200 and the third pressure plate 400 may press the first elastic sealing part to deform and expand, the third pressure plate 400 and the second pressure plate 300 press the second elastic sealing part to deform and expand, and the first elastic sealing part and the second elastic sealing part are both in sealing connection with the inner wall of the pipe in the deformation and expansion state.

In a specific operation process, the driving disc 700 may drive the first platen 200 to move toward the third platen 400, the first platen 200 pushes the third platen 400 to move toward the second platen 300 through the first elastic sealing portion, the first elastic sealing portion is pressed and deformed by the first platen 200 and the third platen 400, and the second elastic sealing portion is pressed and deformed by the third platen 400 and the second platen 300.

In this scheme, the first elastic sealing portion can realize the sealed of pipeline, and the sealed of pipeline also can be realized to the second elastic sealing portion, and the area of contact of elastic sealing portion and pipeline inner wall increases, therefore the double seal of pipeline can be realized to the scheme to pipeline sealing device's sealing performance can be improved.

In addition, when the third platen 400 plays a role of auxiliary support for the elastic sealing portion, the elastic sealing portion can be effectively prevented from being depressed and bent.

Alternatively, the third platen 400 may be a hollow structure in order to reduce the weight of the line sealing apparatus. Of course, the third platen 400 may have other configurations, and is not limited herein.

In another alternative embodiment, the side of the first platen 200 facing the third platen 400 may be provided with a first receiving groove 210, and a projected contour of the third platen 400 in a projection in the axial direction of the connecting rod 100 is located within a projected contour of the first receiving groove 210. At this time, when there is no first elastic sealing portion between the first platen 200 and the second platen 300, a portion of the third platen 400 may be located in the first receiving recess 210.

The second pressure plate 300 is provided with a second accommodating recess 310 on a side facing the third pressure plate 400, and a projected contour of the third pressure plate 400 is located within a projected contour of the second accommodating recess 310 in a projection in the axial direction of the connecting rod 100. At this time, when there is no second elastic sealing portion between the third platen 400 and the second platen 300, a portion of the third platen 400 may be located in the second receiving recess 310.

The side wall of the third pressure plate 400 is annularly provided with an annular projection 410, and in a projection in the axial direction of the connecting rod 100, a projection contour of the annular projection 410 is located outside a projection contour of the first accommodating recess 210 and a projection contour of the second accommodating recess 310. At this time, when there is no elastic sealing portion between the first platen 200 and the second platen 300, one side of the annular protrusion 410 is overlapped with the edge of the first platen 200, and the other side of the annular protrusion 410 is overlapped with the second platen 300, and the first platen 200, the third platen 400 and the second platen 300 form a buckling structure which is sequentially stacked, so that the buckling structure formed by the first platen 200, the third platen 400 and the second platen 300 has a small volume, and is convenient to store and transport. Meanwhile, the buckling structure formed by the first pressure plate 200, the third pressure plate 400 and the second pressure plate 300, so that relative movement between two adjacent pressure plates of the first pressure plate 200, the third pressure plate 400 and the second pressure plate 300 is not easy to occur, and the first pressure plate 200, the third pressure plate 400 and the second pressure plate 300 are not easy to wear.

In the above embodiment, when the operator applies a driving force to the driving disk 700, the pipeline sealing device is easily pushed to move in the pipeline, so that the elastic sealing portion is not easily expanded and deformed. In order to solve this problem, in an alternative embodiment, the pipeline sealing device disclosed in the embodiment of the present invention may further include a fixing assembly 500, where the fixing assembly 500 is connected to the second platen 300, and the fixing assembly 500 is connected to an inner wall of the pipeline. The fixing assembly 500 can limit the movement of the second pressure plate 300 in the pipe, thereby preventing the pipe sealing device from moving in the pipe without affecting the expansion and deformation of the elastic sealing part.

While a specific configuration of the securing assembly 500 is disclosed herein, other configurations of the securing assembly 500 are possible and are not intended to be limiting. Specifically, the fixing assembly 500 may include a cylinder 510 and a plurality of set screws 520, the plurality of set screws 520 are uniformly disposed on a circumferential surface of the cylinder 510, the set screws 520 are in threaded connection with the cylinder 510, the set screws 520 contact with an inner wall of a pipeline, the cylinder 510 is fixed in the pipeline through the set screws 520, one side of the second pressure plate 300, which is away from the first pressure plate 200, is provided with a first positioning protrusion 320, a part of the first positioning protrusion 320 is located in the cylinder 510, and the first protrusion and the cylinder 510 are in positioning fit in an axial direction of the cylinder 510.

In a specific operation process, as shown in fig. 1, firstly, the set screw 520 is screwed to make the set screw 520 push against the side wall of the pipeline, so as to fix the cylinder 510 in the pipeline, and secondly, the first positioning protrusion 320 of the second pressure plate 300 partially extends into the cylinder 510, at this time, when the operator drives the disk 700 to move, the cylinder 510 can provide a reverse thrust for the second pressure plate 300, so as to prevent the pipeline sealing device from moving. Meanwhile, the cylinder 510 plays a role of auxiliary support for the second platen 300, thereby preventing the second platen 300 from shaking when pressing the elastic sealing portion. In addition, the axis of the cylinder 510 and the axis of the pipeline can be coincided by adjusting the positioning screw 520, so that the pipeline sealing device is installed at the central position of the pipeline, the elastic sealing part is uniformly contacted with the inner wall of the pipeline, and the sealing effect is better.

In order to achieve a better positioning effect between the first positioning protrusion 320 and the cylinder 510, in an alternative embodiment, the first positioning protrusion 320 has a tapered structure in a direction from the first platen 200 to the second platen 300, and a side wall of the first positioning protrusion 320 has a curved structure. At this time, the first positioning protrusion 320 is of a hemispherical structure, the surface of the first positioning protrusion 320 is overlapped on the edge of the port of the cylinder 510, and at this time, the cylinder 510 is overlapped with the axis of the first positioning protrusion 320, so that the positioning effect of the cylinder 510 and the first positioning protrusion 320 is better. Alternatively, the cylinder 510 may have a cylindrical structure, and the cylinder 510 is matched with the first positioning protrusion 320, so as to further improve the positioning effect of the second platen 300 and the cylinder 510. Of course, the first positioning protrusion 320 and the cylinder 510 may have other shapes, which is not limited herein.

In another embodiment, a second positioning protrusion 220 is disposed on a side of the first platen 200 facing the driving disc 700, the second positioning protrusion 220 has a tapered structure in a direction from the first platen 200 to the driving disc 700, and a sidewall of the second positioning protrusion 220 has a curved structure. In this scheme, protruding 220 in second location is hemispherical structure, and the central axis of second pressure disk 300 coincides mutually with the central line axis of the protruding 220 in second location, and the hemispherical structure location is more convenient to make the direction of the drive power of driving-disc 700 the same with the central axis of the protruding 220 in second location, thereby when making first pressure disk 200 extrusion elastic sealing portion, the effort of each part is comparatively balanced, and then makes elastic sealing portion's dilational strain comparatively balanced.

Optionally, when the elastic sealing portion is in sealing fit with the inner wall of the pipe, the driving disc 700 can be in limit fit with the surface where the port of the pipe is located, and at this time, the port of the pipe can limit the moving direction of the driving disc 700, so that the driving disc 700 is more stable in moving.

In the above embodiment, when the elastic sealing portion is in sealing engagement with the inner wall of the pipe, the driving disc 700 can be prevented from moving by the engagement of the jack screw and the jack screw hole. However, in this method, the opening position of the jack hole is fixed, and it is difficult to fix the position of the drive plate 700 at different degrees of expansion and deformation of the elastic seal portion. To this end, in an alternative embodiment, the first end of the connecting rod 100 is provided with a first threaded section 110, and the first threaded section 110 is threadedly connected with the driving disk 700. In this scheme, operating personnel rotates driving-disc 700, can realize driving-disc 700 and remove, and the helicitic texture has self-locking function, consequently need not additionally set up jackscrew and jackscrew hole and fix the position of driving-disc 700, and at this moment, driving-disc 700 can be relatively fixed in the optional position of first screw section 110 to can satisfy the position of driving-disc 700 under the different deformation degree of elastic sealing portion.

Alternatively, the connecting rod 100 may be a bolt, one end of the bolt away from the nut is provided with the first threaded section 110, and the second pressure plate 300 may be welded to the nut.

When the driving disk 700 moves away from the first platen 200, it is easily slipped out from the connecting rod 100, so that the pipe sealing apparatus is damaged, and the reliability of the pipe sealing apparatus is low. In order to solve this problem, in an optional embodiment, the pipeline sealing device disclosed in the embodiment of the present invention may further include a first limiting nut 610, the first limiting nut 610 is in threaded connection with the first threaded section 110, the first limiting nut 610 and the first pressure plate 200 are respectively located at two sides of the driving disc 700, and the first limiting nut 610 is in limiting fit with the driving disc 700 in the axial direction of the connecting rod 100. In this scheme, first stop nut 610 can prevent driving disc 700 from following connecting rod 100 and roll off, and then has improved pipeline sealing device's reliability.

In addition, when elasticity sealing portion and pipeline inner wall sealing fit, first stop nut 610 can play supplementary locking effect to driving-disc 700, can prevent effectively that the resilience force of elasticity sealing portion from promoting driving-disc 700, and at this moment, driving-disc 700 and first stop nut 610 are equivalent to two nut locking structures to can provide the effort for elasticity sealing portion, make elasticity sealing portion keep the inflation deformation state.

Because the thickness of the driving disc 700 is small, the screwing length of the first thread section 110 and the driving disc 700 is easy to be short, and the acting force which can be borne by the threads of the driving disc 700 is small, so that the threads of the driving disc 700 are easy to crack, and the reliability of the pipeline sealing device is low. In an alternative embodiment, the driving disk 700 is provided with a lead screw cover 710 on a side facing the first pressure plate 200, the lead screw cover 710 is sleeved on the connecting rod 100, the lead screw cover 710 is in threaded connection with the first thread section 110, and an end of the lead screw cover 710 facing away from the driving disk 700 is connected with the first pressure plate 200.

In a specific operation process, an operator applies a driving force to the driving disc 700, the driving disc 700 drives the lead screw sleeve 710 to move towards the first platen 200, and the lead screw sleeve 710 can push the first platen 200 to move towards the second platen 300. The first pressure plate 200 may be welded to one end of the lead screw housing 710 such that the first pressure plate 200, the lead screw housing 710, and the drive plate 700 are an integral component. The first pressure plate 200 may also be in contact with only the lead screw cover 710, and the lead screw cover 710 is in contact with the first pressure plate 200 at a position where the lead screw cover 710 can push the first pressure plate 200 to slide. The screwing distance of the threads between the driving disc 700 and the first thread section 110 is lengthened, so that the acting force borne by the threads of the driving disc 700 is large, the threads of the driving disc 700 are not easily damaged, and the reliability of the pipeline sealing device is high.

In order to facilitate the disassembly of the line sealing device, the second end of the connecting rod 100 may be provided with a second threaded section 120, the second threaded section 120 being in threaded connection with the second pressure plate 300. In this scheme, the second platen 300 can be detached from the connecting rod 100, thereby facilitating the storage of the pipe sealing device.

In order to prevent the second pressure plate 300 from sliding during the pressing process, so as to easily make the second pressure plate 300 slide out of the connecting rod 100, in an alternative embodiment, the pipeline sealing device may further include a second limiting nut 620, the second limiting nut 620 and the first pressure plate 200 are respectively located at two sides of the second pressure plate 300, the second limiting nut 620 is in threaded connection with the second threaded section 120, and the second limiting nut 620 is in limiting fit with the second pressure plate 300 in the axial direction of the connecting rod 100. In this scheme, second stop nut 620 can prevent that second pressure disk 300 from taking place to slide at the extruded in-process, and then has improved pipeline sealing device's reliability.

In an alternative embodiment, a driving handle is disposed on a side of the driving disk 700 facing away from the first platen 200, and the driving handle is located in an edge region of the driving disk 700, and at this time, the driving handle is further away from a central region of the driving disk 700, so that an operator can more easily manipulate the driving disk 700.

In another alternative embodiment, the pipeline sealing device disclosed in the embodiment of the present invention may further include a driving mechanism, the driving mechanism is disposed on the connecting rod 100, the driving mechanism is connected to the driving disc 700, and the driving mechanism may operate the driving disc 700 to slide. In the scheme, the operator can realize remote operation, and simultaneously, the labor intensity of the operator is also reduced. Alternatively, the driving mechanism may be a driving motor, an air cylinder, or other components, and of course, the driving mechanism may also be other power structures.

Based on the pipeline sealing device according to any one of the embodiments of the invention, the embodiment of the invention also discloses a pipeline system.

The pipeline system disclosed by the invention can be an oil pressure pipeline system, a pneumatic pipeline system and other pipeline systems, and the pipeline system is not limited in the text.

In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The pipeline sealing device is applied to a pipeline system and is characterized by comprising a connecting rod (100), a driving disc (700), a first pressure plate (200), a second pressure plate (300) and an elastic sealing part;

the driving disc (700), the first pressure plate (200) and the second pressure plate (300) are sleeved on the connecting rod (100) in sequence, the driving disc (700) and the first pressure plate (200) are both connected with the connecting rod (100) in a sliding way, the second pressure plate (300) is fixedly connected with the connecting rod (100), the driving disc (700) and the first pressure plate (200) can slide along the axial direction of the connecting rod (100), the elastic sealing portion is provided between the first pressure plate (200) and the second pressure plate (300), the driving disc (700) drives the first pressure plate (200) to slide towards the direction of the second pressure plate (300), the first pressure plate (200) and the second pressure plate (300) press the elastic sealing part to deform and expand, the elastic sealing part is in a deformation expansion state and can be in sealing connection with the inner wall of the pipeline system.

2. The line sealing device according to claim 1, further comprising a third pressure plate (400), said third pressure plate (400) being slidingly arranged to said connecting rod (100), said third pressure plate (400) being arranged between said first pressure plate (200) and said second pressure plate (300);

the elastic sealing part comprises a first elastic sealing part and a second elastic sealing part, the first elastic sealing part is arranged between the first pressure plate (200) and the third pressure plate (400), the second elastic sealing portion is provided between the third pressure plate (400) and the second pressure plate (300), the driving disc (700) can drive the first pressure plate (200) to slide towards the direction of the third pressure plate (400), the first pressing plate (200) can drive the third pressing plate (400) to move towards the direction of the second pressing plate (300), the first pressure plate (200) and the third pressure plate (400) can press the first elastic sealing part to deform and expand, the third pressure plate (400) and the second pressure plate (300) can press the second elastic sealing part to deform and expand, the first elastic sealing part and the second elastic sealing part are in sealing connection with the inner wall of the pipeline in a deformation expansion state.

3. The line sealing device according to claim 2, characterized in that the side of the first pressure plate (200) facing the third pressure plate (400) is provided with a first receiving groove (210), and in a projection in the axial direction of the connecting rod (100), the projection contour of the third pressure plate (400) is located within the projection contour of the first receiving groove (210);

a second accommodating groove (310) is formed in one side, facing the third pressure plate (400), of the second pressure plate (300), and in the projection of the connecting rod (100) in the axial direction, the projection outline of the third pressure plate (400) is located within the projection outline of the second accommodating groove (310);

the side wall of the third pressure plate (400) is annularly provided with an annular bulge (410), and in the projection of the axis direction of the connecting rod (100), the projection contour of the annular bulge (410) is positioned outside the projection contour of the first accommodating groove (210) and the projection contour of the second accommodating groove (310).

4. The line sealing device according to claim 1, characterized in that the fixing assembly (500) comprises a cylinder (510) and a plurality of set screws (520), the plurality of positioning screws (520) are uniformly arranged on the circumferential surface of the cylinder (510), the set screws (520) are in threaded connection with the cylinder (510), the set screws (520) are in contact with the inner wall of the pipeline, the cylinder (510) is fixed in the pipeline through the plurality of positioning screws (520), a first positioning bulge (320) is arranged on one side of the second pressing plate (300) departing from the first pressing plate (200), part of the first positioning projection (320) is positioned in the cylinder (510), the first positioning bulge (320) is matched with the cylinder (510) in a positioning mode in the axial direction of the cylinder (510).

5. The line sealing device according to claim 4, characterized in that, in the direction from the first pressure plate (200) to the second pressure plate (300), the first positioning protrusion (320) has a tapered structure, and the side wall of the first positioning protrusion (320) has a curved structure.

6. The pipe sealing device according to claim 1, wherein a side of the first pressure plate (200) facing the driving plate (700) is provided with a second positioning protrusion (220), the second positioning protrusion (220) has a tapered structure in a direction from the first pressure plate (200) to the driving plate (700), and a side wall of the second positioning protrusion (220) has a curved structure.

7. The line sealing device according to claim 1, characterized in that the first end of the connecting rod (100) is provided with a first threaded section (110), the first threaded section (110) being in threaded connection with the driving disc (700).

8. The line sealing device according to claim 7, further comprising a first limiting nut (610), wherein the first limiting nut (610) is in threaded connection with the first threaded section (110), the first limiting nut (610) and the first pressure plate (200) are respectively located on two sides of the driving plate (700), and the first limiting nut (610) is in limiting fit with the driving plate (700) in the axial direction of the connecting rod (100).

9. The pipeline sealing device according to claim 7, wherein a screw sleeve (710) is disposed on a side of the driving disc (700) facing the first pressure plate (200), the screw sleeve (710) is sleeved on the connecting rod (100), the screw sleeve (710) is in threaded connection with the first threaded section (110), and an end of the screw sleeve (710) facing away from the driving disc (700) is connected with the first pressure plate (200).

10. A pipe system comprising a pipe sealing device according to any one of claims 1 to 9.