A temporary plugging structure for underground pipeline maintenance work

Abstract

The present invention provides a temporary plugging structure for underground pipeline maintenance operations, which relates to the field of temporary pipeline plugging structures, including: a plugging cover and a pipeline, wherein a water retaining ring is welded on the circumferential outer ring of the plugging cover, the plugging cover is installed on the head end opening of the pipeline, and six limiting plug shafts are welded around the circumferential outer ring position of the inner end face of the plugging cover; a rubber sealing ring is fitted on the inner end face of the plugging cover, and four short positioning sleeves are glued and fixed around the circumferential inner ring of the rubber sealing ring, the head end sections of the four positioning plug rods correspond to the four positioning short sleeves for plugging and cooperation, the four positioning plug rods can plug and fix the rubber sealing ring on the inner end face of the plugging cover, and the rubber sealing ring is plugged and fixed by a spring latch assembly, and through the four finger plates, four fingers can synchronously push and drive the four positioning plug rods to be pulled out, so as to complete the disassembly of the rubber sealing ring, so that the disassembly, assembly and replacement of the rubber seal is simpler, more convenient and faster.

Description

Technical Field

[0001] The invention relates to the technical field of temporary pipeline plugging structures, and in particular to a temporary plugging structure for underground pipeline maintenance operations. Background Art

[0002] In the construction of water supply and drainage projects, when the drainage pipes buried underground and the valves thereon need to be repaired or inspected, the water inlet end of the drainage pipes needs to be temporarily blocked, which requires the use of a temporary blocking structure for underground pipeline maintenance operations.

[0003] The rubber seals on the inner side of the temporary sealing structure of the existing pipeline are mostly directly fixed by gluing. When disassembling and replacing the rubber seals, tools are required to scrape, cut, remove and clean the rubber seals, which is troublesome and inconvenient to operate. In addition, the sealing cover plates mostly use multiple threaded parts to tighten and loosen the flange at the first end of the pipeline, resulting in the need to tighten and loosen multiple threaded parts in turn when disassembling and assembling the sealing cover plates, which is cumbersome and inefficient, and cannot be well adapted to the needs of frequent and rapid disassembly and assembly of temporary sealing structures. Summary of the invention

[0004] In view of this, the present invention provides a temporary plugging structure for underground pipeline maintenance operations to solve the problem that the rubber seals on the inner side of the temporary plugging structure are mostly directly fixed by gluing, and when the rubber seals are disassembled and replaced, tools are needed to scrape, cut, remove and clean the rubber seals, which is cumbersome and inconvenient to operate.

[0005] The present invention provides a temporary plugging structure for underground pipeline maintenance operations, specifically comprising: a plugging cover and a pipeline, wherein a six-hole flange is welded at the head end of the pipeline; the plugging cover is a circular structure, and a water retaining ring is welded on the circumferential outer ring of the plugging cover, the plugging cover is installed on the head end opening of the pipeline, and six limiting plug shafts are welded around the circumferential outer ring position of the inner end face of the plugging cover, and the six limiting plug shafts are plugged and matched with six through-mounting holes on the flange; a driving assembly is rotatably installed at the center of the outer end face of the plugging cover, and the driving assembly is welded together by a large-diameter driving wheel and a worm gear coaxially welded with the large-diameter driving wheel; six groups of positioning short shafts are welded around the circumferential outer ring position of the outer end face of the plugging cover, six strip sliders are slidably installed around the six groups of positioning short shafts, and six strip sliders are rotatably installed on the middle sections of the six strip sliders. There are six threaded connecting shafts, and six rectangular sliding positioning plates are screwed on the six threaded connecting shafts; four groups of positioning ear blocks are symmetrically welded in a cross shape at the central position of the inner end face of the blocking cover, and four positioning rods are slidably installed on the four groups of positioning ear blocks through spring pushing; a rubber sealing ring is fitted on the inner end face of the blocking cover, and four short positioning sleeves are glued and fixed around the inner circle of the circumference of the rubber sealing ring, and the head end sections of the four positioning rods correspond to the four short positioning sleeves for plug-in cooperation; two positioning ear plates are welded at intervals on the outer end face of the blocking cover at the positions of two adjacent strip sliders, and a worm is rotatably installed on the two positioning ear plates, the worm is meshed with the worm wheel for transmission, and a hexagonal nut is arranged at the head end of the worm; the head ends of the six threaded connecting shafts are also arranged at a hexagonal nut.

[0006] Furthermore, when the plugging cover is installed on the flange at the head end of the pipeline, the water retaining ring covers the gap between the plugging cover and the pipeline flange, and the rubber sealing ring is squeezed and sealed between the plugging cover and the pipeline flange.

[0007] Furthermore, a rectangular groove is concavely formed on the middle section of the strip-shaped sliding block, and a connecting short shaft is welded in the middle part of the rectangular groove.

[0008] Furthermore, six connecting rods are rotatably connected to the outer circumference of the large-diameter driving wheel of the driving assembly, and the tail ends of the six connecting rods are rotatably connected to the connecting short shafts on the six strip sliders.

[0009] Furthermore, two wedge blocks are symmetrically welded at one end of the sliding positioning plate facing the pipeline, and two sliding shafts are symmetrically welded at one end of the sliding positioning plate away from the pipeline.

[0010] Furthermore, the twelve wedge blocks on the six sliding positioning plates are arranged in groups of two and in a surrounding manner, and the six groups of wedge blocks slide centripetally and come into contact with the flange at the head end of the pipeline.

[0011] Furthermore, the twelve sliding shafts on the six sliding positioning plates correspond to the six strip-shaped sliding blocks that penetrate and slide through them.

[0012] Furthermore, a finger-shift plate is welded to the tail end section of each of the four positioning rods, and each of the four finger-shift plates is a convex structure, and the thicker end of the four finger-shift plates is slidably fitted with the inner end surface of the blocking cover.

[0013] Beneficial Effects

[0014] 1. In the present invention, the positioning rods at four locations can be inserted and fixed on the inner end surface of the plug cover, and the rubber sealing ring is inserted and fixedly installed by a spring latch assembly. Through the finger-pulling plates at four locations, four fingers can synchronously push and drive the positioning rods at four locations to be pulled out, so as to complete the disassembly of the rubber sealing ring. Compared with the traditional sealing structure that fixes the rubber seal in the form of gluing, the trouble of using tools to scrape, cut, remove and clean the rubber seal when disassembling and replacing the rubber seal can be eliminated, and the disassembly, assembly and replacement of the rubber seal is simpler, more convenient and faster.

[0015] 2. In the present invention, six connecting rods, a driving assembly and six bar-shaped sliders are connected together to form a six-position crank slider mechanism. Through the six-position crank slider mechanism, the forward and reverse rotation driving assembly can drive the six bar-shaped sliders, six sliding positioning plates and six groups of wedge blocks to slide centripetally, thereby completing the tightening and sealing of the plugging cover at one time. Compared with the traditional sealing structure that uses multiple threaded parts to lock and seal the plugging cover, it eliminates the trouble of tightening and loosening multiple threaded parts in turn when disassembling the plugging cover, simplifies the tightening and disassembly steps of the sealing structure, and is suitable for the use requirements of frequent and quick disassembly and assembly of temporary sealing structures.

[0016] 3. In the present invention, the six threaded connection shafts can push and drive the six sliding positioning plates and six groups of wedge blocks to slide inwards and outwards to fine-tune the tightening sealing pressure on the corresponding sides. It is suitable for individually fine-tuning the tightness of the sliding positioning plate and a group of wedge blocks on the leakage side to suppress leakage, so as to avoid the situation where the six groups of wedge blocks can only slide inwards and outwards synchronously to apply force to the circumferential outer ring of the plugging cover synchronously, but cannot apply additional tightness to the leakage position of the plugging cover. The invention is flexible to use and convenient for handling the leakage of the plugging cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0018] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached picture:

[0020] Figure 1 It is a schematic diagram of the outer structure of the blocking cover according to an embodiment of the present invention.

[0021] Figure 2 Schematic diagram of the worm structure of an embodiment of the present invention.

[0022] Figure 3 Schematic diagram of the wedge block structure of an embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the inner structure of the blocking cover according to an embodiment of the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of a rubber sealing ring according to an embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of a sliding positioning plate according to an embodiment of the present invention.

[0026] Figure 7 It is a schematic diagram of the bottom structure of the sliding positioning plate of an embodiment of the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of a driving component of an embodiment of the present invention.

[0028] Fig. 9 The embodiment of the present invention Figure 4 A schematic diagram of the enlarged structure of part A.

[0029] Reference numerals list

[0030] 1. Plug cover; 101. Water retaining ring; 102. Positioning ear plate; 103. Worm; 104. Positioning short shaft; 105. Limiting plug shaft; 106. Positioning plug rod; 2. Pipeline; 3. Drive assembly; 301. Connecting rod; 4. Strip slider; 401. Threaded connecting shaft; 5. Sliding positioning plate; 501. Wedge block; 502. Sliding shaft; 6. Rubber sealing ring; 601. Positioning short sleeve. DETAILED DESCRIPTION

[0031] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0032] Example: Please refer to Figures 1 to 9 As shown:

[0033] The present invention provides a temporary plugging structure for underground pipeline maintenance operations, comprising a plugging cover 1 and a pipeline 2, wherein a six-hole flange is welded to the head end of the pipeline 2; the plugging cover 1 is a circular structure, and a water retaining ring 101 is welded on the circumferential outer ring of the plugging cover 1, and the plugging cover 1 is installed on the head end opening of the pipeline 2 for plugging, and six limiting plug shafts 105 are welded around the circumferential outer ring position of the inner end face of the plugging cover 1, and the limiting plug shafts 105 are plugged and matched with six through-mounting holes on the flange; a driving assembly 3 is rotatably installed at the center of the outer end face of the plugging cover 1, and the driving assembly 3 is welded together by a large-diameter driving wheel and a worm wheel coaxially welded with the large-diameter driving wheel; six groups of positioning short shafts 104 are welded around the circumferential outer ring position of the outer end face of the plugging cover 1, and the six groups of positioning short shafts 104 are welded Six strip sliders 4 are slidably installed around the short shaft 104, and six threaded connecting shafts 401 are rotatably installed on the middle sections of the six strip sliders 4. Six rectangular sliding positioning plates 5 are screwed on the six threaded connecting shafts 401. The six threaded connecting shafts 401 can push and drive the six sliding positioning plates 5 and six groups of wedge blocks 501 to slide inside and outside to fine-tune the tightening sealing pressure on the corresponding sides, which is suitable for fine-tuning the tightness of the sliding positioning plates 5 and a group of wedge blocks 501 on the leakage side to suppress leakage, so as to avoid that the six groups of wedge blocks 501 can only slide inside and outside synchronously to apply force to the circumference of the outer ring of the plugging cover 1 synchronously, and cannot implement additional tightness on the leakage position of the plugging cover 1. It is flexible to use and convenient for handling the leakage of the plugging cover 1; the middle of the inner end face of the plugging cover 1 Four groups of positioning ear blocks are symmetrically welded in a cross shape at the center position, and four groups of positioning ear blocks are slidably installed with positioning rods 106 at four points through spring pushing; a rubber sealing ring 6 is fitted on the inner end surface of the plugging cover 1, and four positioning short sleeves 601 are glued and fixed around the circumferential inner circle of the rubber sealing ring 6, and the head ends of the four positioning rods 106 are correspondingly plugged into the four positioning short sleeves 601, and the four positioning rods 106 can be plugged and fixed to the inner end surface of the plugging cover 1, and the rubber sealing ring 6 is plugged and fixed with a spring latch assembly (i.e., the four positioning rods 106), and through the four finger plates, four fingers can synchronously push and drive the four positioning rods 106 to be pulled out, thereby completing the disassembly of the rubber sealing ring 6, Compared with the traditional sealing structure that uses adhesive to fix the rubber seal, it can save the trouble of using tools to scrape, cut, remove and clean the rubber seal when disassembling and replacing the rubber seal, and the disassembly, assembly and replacement of the rubber seal is simpler, more convenient and faster; two positioning ear plates 102 are welded at intervals at the positions of two adjacent strip sliders 4 on the outer end surface of the plugging cover 1, and a worm 103 is rotatably installed on the two positioning ear plates 102, and the worm 103 is meshed with the worm wheel for transmission, and the head end of the worm 103 is provided with a hexagonal nut; the head ends of the six threaded connecting shafts 401 are also provided with a hexagonal nut; a rectangular groove is concavely opened on the middle section of the strip slider 4, and a connecting short shaft is welded in the middle part of the rectangular groove;Two wedge blocks 501 are symmetrically welded at one end of the sliding positioning plate 5 facing the pipe 2, and two sliding shafts 502 are symmetrically welded at one end of the sliding positioning plate 5 away from the pipe 2; the twelve sliding shafts 502 on the six sliding positioning plates 5 correspond to the six bar-shaped sliders 4 that penetrate and slide through; the tail end sections of the four positioning rods 106 are all welded with a finger plate, and the four finger plates are all convex structures, and the thicker ends of the four finger plates are slidably fitted with the inner end surface of the plug cover 1. ;

[0034] Among them, when the plugging cover 1 is installed on the flange at the head end of the pipeline 2, the water retaining ring 101 is covered on the gap between the plugging cover 1 and the flange of the pipeline 2, and the rubber sealing ring 6 is squeezed and sealed between the plugging cover 1 and the flange of the pipeline 2. The water retaining ring 101 can block the medium that is sprayed out due to the loose sealing of the plugging cover 1 and gather the medium to spray backwards, so as to prevent the medium from being directly sprayed out along the gap between the plugging cover 1 and the flange of the pipeline 2 to injure people.

[0035] Among them, six connecting rods 301 are rotatably connected on the circumferential outer ring of the large-diameter driving wheel of the driving component 3, and the tail ends of the six connecting rods 301 are rotatably connected to the connecting short shafts on the six bar sliders 4. The six connecting rods 301, the driving component 3 and the six bar sliders 4 are connected together to form a six-crank slider mechanism. Through this six-crank slider mechanism, the forward and reverse rotation of the driving component 3 can drive the six bar sliders 4, the six sliding positioning plates 5 and the six groups of wedge blocks 501 to slide centripetally, and complete the tightening and sealing of the blocking cover 1 at one time. Compared with the traditional sealing structure that uses multiple threaded parts to lock and seal the blocking cover 1, it eliminates the trouble of tightening and loosening multiple threaded parts in turn when disassembling the blocking cover 1, simplifies the tightening and disassembly steps of the sealing structure, and is suitable for the use requirements of frequent and quick disassembly and assembly of temporary sealing structures.

[0036] Among them, the twelve wedge blocks 501 on the six sliding positioning plates 5 are arranged in groups of two and in a circular manner, and the six groups of wedge blocks 501 slide centripetally to abut against the flange at the first end of the pipeline 2. Through the inclined guiding principle of the twelve wedge blocks 501, the six sliding positioning plates 5 slide centripetally to tighten and seal the plug cover 1 and the flange at the first end of the pipeline 2 together.

[0037] Specific usage and function of this embodiment: In the present invention, four positioning rods 106 can be inserted and fixed on the inner end surface of the plug cover 1. When the plug cover 1 is installed on the flange at the head end of the pipe 2, the water retaining ring 101 is covered on the gap between the plug cover 1 and the flange of the pipe 2, and the rubber sealing ring 6 is squeezed and sealed between the plug cover 1 and the flange of the pipe 2. Through the inclined guiding principle of the twelve wedge blocks 501, the six sliding positioning plates 5 can slide centripetally to tighten and seal the plug cover 1 and the head end flange of the pipe 2 together. The six connecting rods 301, the driving assembly 3 and the six strip sliders 4 are connected together to form a six-crank slider mechanism. Through this six-crank slider mechanism, the forward and reverse rotation of the driving assembly 3 can drive the six strip sliders 4, the six sliding positioning plates 5 and the six groups of wedge blocks 501 to slide centripetally, completing the tightening and sealing of the plug cover 1 at one time;

[0038] The water retaining ring 101 can block the medium that is sprayed out due to the loose sealing of the plugging cover 1 and gather the medium to spray it backwards, so as to prevent the medium from being directly sprayed out along the gap between the plugging cover 1 and the flange of the pipeline 2 to injure people. The six threaded connecting shafts 401 can drive the six sliding positioning plates 5 and the six groups of wedge blocks 501 to slide inside and outside to fine-tune the tightening sealing pressure on the corresponding side, which is suitable for individually fine-tuning the tightness of the sliding positioning plate 5 and a group of wedge blocks 501 on the leakage side to suppress leakage.

[0039] Finally, it should be noted that when describing the position of each component and the matching relationship between them, the present invention usually takes one / a pair of components as an example. However, those skilled in the art should understand that such position, matching relationship, etc. are also applicable to other components / other pairs of components.

[0040] The above are merely exemplary embodiments of the present invention and are not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A temporary blocking structure for underground pipeline maintenance operations, characterized in that: include: A plugging cover (1) and a pipe (2), wherein a six-hole flange is welded to the head end of the pipe (2); the plugging cover (1) is of a circular structure, and a water retaining ring (101) is welded on the outer circumference of the plugging cover (1); the plugging cover (1) is installed to seal the opening of the head end of the pipe (2); six limiting plug shafts (105) are welded around the outer circumference of the inner end surface of the plugging cover (1); the six limiting plug shafts (105) are plugged and matched with six through-mounting holes on the flange; the outer circumference of the plugging cover (1) is welded to the outer circumference of the inner end surface of the plugging cover (1); A driving assembly (3) is rotatably mounted at the center of the side end surface, and the driving assembly (3) is composed of a large-diameter driving wheel and a worm wheel coaxially welded to the large-diameter driving wheel; six groups of positioning short shafts (104) are welded around the outer circumference of the outer end surface of the plug cover (1), six strip-shaped sliders (4) are slidably mounted around the six groups of positioning short shafts (104), and six threaded connection shafts (401) are rotatably mounted on the middle sections of the six strip-shaped sliders (4). (401) is screwed with six rectangular sliding positioning plates (5); four groups of positioning ear blocks are symmetrically welded in a cross shape at the center position of the inner end surface of the plug cover (1), and four positioning plug rods (106) are slidably installed on the four groups of positioning ear blocks through spring push; a rubber sealing ring (6) is fitted on the inner end surface of the plug cover (1), and four positioning short sleeves (601) are glued and fixed around the inner circle of the rubber sealing ring (6), and the four positioning plug rods (106 ) is plugged into and matched with four positioning short sleeves (601); two positioning ear plates (102) are welded at intervals on the outer end surface of the blocking cover (1) at the positions of two adjacent strip sliders (4); a worm (103) is rotatably installed on the two positioning ear plates (102), the worm (103) is meshed with the worm wheel for transmission, and a hexagon socket nut is arranged at the head end of the worm (103); the head ends of the six threaded connection shafts (401) are also each provided with a hexagon socket nut; A rectangular groove is formed in the middle section of the strip-shaped slider (4), and a connecting short shaft is welded in the middle part of the rectangular groove; six connecting rods (301) are rotatably connected to the outer circumference of the large-diameter driving wheel of the driving assembly (3), and the tail ends of the six connecting rods (301) are rotatably connected to the six connecting short shafts on the strip-shaped slider (4).

2. A temporary blocking structure for underground pipeline maintenance work as claimed in claim 1, characterized in that: When the plugging cover (1) is installed on the flange at the head end of the pipeline (2), the water retaining ring (101) is covered on the gap between the plugging cover (1) and the flange of the pipeline (2), and the rubber sealing ring (6) is squeezed and sealed between the plugging cover (1) and the flange of the pipeline (2).

3. A temporary blocking structure for underground pipeline maintenance work as claimed in claim 1, characterized in that: Two wedge blocks (501) are symmetrically welded to one end of the sliding positioning plate (5) facing the pipeline (2), and two sliding shafts (502) are symmetrically welded to one end of the sliding positioning plate (5) away from the pipeline (2).

4. A temporary blocking structure for underground pipeline maintenance work as claimed in claim 3, characterized in that: The twelve wedge blocks (501) on the six sliding positioning plates (5) are arranged in groups of two and in a circumferential manner, and the six groups of wedge blocks (501) slide centripetally to abut against the flange plate at the head end of the pipeline (2).

5. A temporary plugging structure for underground pipeline maintenance work as claimed in claim 3, characterized in that: The twelve sliding shafts (502) on the six sliding positioning plates (5) correspond to and slide through the six strip-shaped sliding blocks (4).

6. A temporary blocking structure for underground pipeline maintenance work as claimed in claim 1, characterized in that: A finger plate is welded to the tail end section of each of the four positioning rods (106), and each of the four finger plates is a convex structure, and the thicker end of each finger plate is slidably fitted with the inner end surface of the blocking cover (1).

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