Pipe orifice plugging structure for preventing silt and floating pipe

Abstract

A pipe orifice plugging structure of a silt-preventing and floating-preventing pipe comprises a round pipe body of a long-distance heat supply pipe, an inner sealing structure and an outer sealing structure, the round pipe body comprises an inner pipe and an outer wrapping heat preservation layer, and the inner sealing structure comprises an inner sealing water-permeable filtering layer and an extensible fastening inner supporting ring. The edge of the inner sealing water-permeable filtering layer is pressed to the inner wall of the inner pipe connecting end through a fastening inner supporting ring, the outer sealing structure comprises a circular outer sealing water-permeable filtering cover and a fastening limiting piece, the outer sealing water-permeable filtering cover comprises a filtering cover body and an outer sealing cover ring, the filtering cover body is provided with filtering holes, and the outer sealing cover ring forms a buckle hoop ring; the buckling hoop ring is connected to the inner pipe connecting end in a sleeving mode, and the top end of the fastening limiting piece abuts against the outer surface of the inner pipe connecting end. A double-plugging structure is designed and connected, pollutants in the pipe are prevented from entering the pipe, floating of the pipe body is avoided, mounting and dismounting are convenient, safety and reliability are achieved, construction efficiency and quality are improved, and resetting and labor cost is saved.

Description

Technical Field

[0001] The utility model belongs to the field of pipe opening plugging, in particular to a pipe opening plugging structure for an anti-sand and anti-drifting pipe. Background Art

[0002] During the construction of long-distance heating pipelines, trench welding is generally used, and it is inevitable that the pipe mouths are exposed during the construction process. If the pipe mouths are not blocked during the construction process, mud, large clods of earth, wild animals, floating garbage, etc. may enter the pipeline, greatly affecting the later functions and debugging. Especially in rainy or windy weather, pollutants are easy to enter the pipe, which is difficult to clean and may also damage the coating inside the pipe. At the same time, existing blocking methods such as blind plate blocking have the problem of forming a cavity inside the pipe body after sealing. When the water level rises on rainy days, the pipe will float, and it needs to be reset and repaired. Therefore, there is an urgent need for a pipe mouth blocking device that can prevent pollutants from entering the pipeline and at the same time ensure that the pipe will not float on rainy days due to sealing. Utility Model Content

[0003] The utility model aims to provide a pipe mouth sealing structure for an anti-silt and anti-drifting pipe, to solve the technical problem that during the welding construction under the ditch, the pipe mouth is exposed, causing pollutants to enter the pipe and cause damage to the pipe, thus affecting the later function and debugging; and to solve the technical problem that a cavity is formed inside the pipe body after sealing and drainage, and the pipe drifting phenomenon will occur when the water level rises on rainy days, requiring the pipe to be reset and repaired.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A pipe orifice plugging structure for preventing sediment and drifting of a pipe comprises a round pipe body, an inner sealing structure and an outer sealing structure of a long-distance heat supply pipe.

[0006] The circular tube body includes an inner tube and an outer covering insulation layer. The end of the inner tube extends beyond the edge of the outer covering insulation layer to form an inner tube connection end.

[0007] The inner sealing structure is sealed on the inner wall of the pipe opening of the inner pipe connection end, and includes an inner sealing water-permeable filter layer and a retractable fastening inner support ring. The inner sealing water-permeable filter layer is made of a flexible material. The inner sealing water-permeable filter layer is unfolded inside the inner pipe to form a plane. The edge of the inner sealing water-permeable filter layer is pressed against the inner wall of the end of the inner pipe connection end by the fastening inner support ring that is opened outward.

[0008] The outer cover of the outer sealing structure is on the outer wall of the pipe mouth at the inner tube connection end, including a circular outer sealing water-permeable filter cover and a fastening limiter. The outer sealing water-permeable filter cover is made of rigid material. The outer sealing water-permeable filter cover includes a filter cover body and an outer sealing cover ring. The filter cover body is provided with a filter hole. The outer sealing cover ring is a buckle ring formed by a vertical plane at the end of the filter cover body. The inner diameter of the buckle ring is not less than the outer diameter of the inner tube. The ring width of the buckle ring is not greater than the length of the inner tube connection end extending out of the outer covering insulation layer. The buckle ring is sleeved on the inner tube connection end.

[0009] A group of spaced limiting holes are opened around the outer circumference of the outer sealing cover ring, and the fastening limiting parts include a reinforcing steel ring and an outer hoop bolt. The reinforcing steel ring is hooped and covers the outer side of the limiting hole. The reinforcing steel ring is fixedly connected to the outer sealing cover ring. Reinforcing holes corresponding to the limiting holes are opened on the reinforcing steel ring, and outer hoop nuts are welded on the reinforcing steel ring at the reinforcing hole positions. The outer hoop bolts pass through the reinforcing holes and the limiting holes in turn to be threadedly connected with the nuts, and the top end of the outer hoop nut is pressed tightly against the outer surface of the inner tube connecting end.

[0010] The inner sealed water-permeable filter layer comprises a filter layer body and a connecting flange, the connecting flange is folded toward the pipe mouth, and the fastening inner support ring is fastened to the connecting flange.

[0011] The inner sealed water-permeable filter layer is a water-permeable filter cloth, and the water-permeable filter cloth adopts a nylon filter mesh not larger than 80 meshes.

[0012] The fastening inner support ring is made of steel, and includes a ring body and a ring end connection structure. The ring end connection structure includes two opposite connecting plates formed by vertically bending the connecting port of the ring body inward, and a bidirectional bolt. The bidirectional bolt includes a screw rod and an inner support nut located at both ends of the screw rod. The left and right halves of the screw rod are provided with external threads in opposite directions, and a connecting plate hole is provided on the connecting plate. An inner support nut is welded on the outer side corresponding to the position of the connecting plate hole, and an internal thread adapted to the screw rod on the corresponding side is provided in the inner support nut. The two ends of the screw rod pass through the inner support nut and the connecting plate hole on the corresponding side in turn. The external thread of the screw rod is threadedly connected to the inner support nut on the corresponding side and is limited by the inner support nut. The rotation of the screw rod in two directions drives the distance change of the connecting plates on both sides to change the expansion and contraction size of the ring body.

[0013] The outer sealed water-permeable filter cover is made of galvanized iron sheet.

[0014] The filter holes are capsule-shaped holes, the ratio of the hole length to the hole width is 3:1, the hole spacing is greater than 2 times the hole width, and the filter holes are arranged along the center to 100mm-200mm away from the outer sealing circle.

[0015] The filter holes are arranged in concentric circles along the filter cover body, the filter holes on each circle are arranged at equal intervals, and the filter holes between adjacent concentric circles have the same spacing.

[0016] The fastening and limiting members are screws, and eight limiting holes are arranged at intervals around the outer sealing ring, and eight fastening and limiting members are arranged.

[0017] The height of the outer hoop bolts after tightening shall not exceed the thickness of the outer insulation layer.

[0018] Compared with the prior art, the utility model has the following characteristics and beneficial effects:

[0019] The utility model provides a pipe opening plugging structure for an anti-sand and anti-drift pipe, which can be arranged at both ends of the pipe. The part of the inner pipe extending out of the insulation layer is used to design and connect a double plugging structure, including an inner sealing structure and an outer sealing structure.

[0020] The inner sealing structure of the utility model is to fix a water-permeable cloth for filtering mud and sand on the inner circle of the pipe mouth with an iron hoop expanded with reverse bolts; the outer sealing structure is to set a pipe mouth cover with filtering holes outside the pipeline, and the outer sealing structure blocks pollutants with larger sizes, which can effectively protect foreign objects from entering the pipeline during the construction process. The inner and outer sealing structures perform double filtering on pollutants with different apertures and sizes, solving the problem that rainwater and mud and sand easily enter the pipeline from the open pipe mouth during the construction of large-diameter pipe network projects, and can effectively prevent the problem of sewage and mud and sand entering the pipe and requiring manual cleaning, greatly reducing the impact of foreign objects entering the pipeline on the function, avoiding damage to the inner wall coating of the pipe, and ensuring the construction quality to a certain extent, saving construction time and labor costs. Achieve the desired protection effect.

[0021] The inner sealing structure and the outer sealing structure of the utility model are both communicated with the air outside the pipe, so as to prevent the formation of cavities, avoid the pipe body from floating and the loss of the cost of floating and resetting the pipe on rainy days, and reduce the cost.

[0022] The structure of the utility model is easy to install and disassemble, safe and reliable, improves construction efficiency and quality, saves labor costs, and creates value for the project in terms of safety measures, construction quality, cost and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the structural disassembly of the utility model.

[0025] Figure 2 It is a structural schematic diagram of a circular tube body of the utility model.

[0026] Figure 3 It is a structural schematic diagram of the inner sealed water permeable filter layer of the utility model.

[0027] Figure 4 It is a structural schematic diagram of the utility model in which the inner sealed water permeable filter layer is installed in a circular tube body.

[0028] Figure 5 It is a structural schematic diagram of the fastening inner support ring of the utility model.

[0029] Figure 6 yes Figure 5 A partial enlarged view of .

[0030] Figure 7 It is a structural schematic diagram of the utility model in which the fastening inner support ring is installed on the inner sealed water-permeable filter layer.

[0031] Figure 8 yes Figure 7 Schematic diagram of the front view structure.

[0032] Fig. 9 It is a structural schematic diagram of the outer sealing structure of the utility model.

[0033] Fig.10 yes Fig. 9 Schematic diagram of the side structure.

[0034] Fig.11 yes Fig. 9 Schematic diagram of the rear view structure.

[0035] Fig.12 yes Fig. 9 Schematic diagram of the reinforced steel ring structure.

[0036] Fig.13 It is a structural schematic diagram of the utility model in which the outer sealing structure is installed outside the circular tube.

[0037] Fig.14 yes Fig.13 Schematic diagram of the front view structure.

[0038] Fig.15 yes Fig.14 A partial enlarged view of .

[0039] Reference numerals:

[0040] 1-circular tube body, 11-inner tube connection end, 12-outer covering insulation layer;

[0041] 2-inner sealing structure, 21-inner sealing water permeable filter layer, 211-filter layer body, 212-connecting flange, 22-fastening inner support ring, 221-ring body, 222-connecting piece, 223-screw, 224-connecting piece hole, 225-inner support nut;

[0042] 3 - external sealing structure, 31 - external sealing water permeable filter cover, 311 - filter cover body, 312 - external sealing cover ring, 313 - filter hole, 314 - limit hole, 315 - reinforcement hole, 32 - fastening limiter, 321 - reinforcement steel ring, 322 - external hoop bolt, 323 - external hoop nut. DETAILED DESCRIPTION

[0043] See Example Figure 1 As shown, a pipe opening sealing structure for an anti-silt and anti-drifting pipe comprises a circular pipe body 1, an inner sealing structure 2 and an outer sealing structure 3 of a long-distance heat supply pipe.

[0044] See also Figure 2 As shown, the circular tube body 1 includes an inner tube and an outer insulating layer 12 , and the end of the inner tube extends beyond the edge of the outer insulating layer 12 to form an inner tube connection end 11 .

[0045] The inner sealing structure 2 is sealed on the inner wall of the pipe opening of the inner pipe connection end 11, and includes an inner sealing water-permeable filter layer 21 and a retractable fastening inner support ring 22. The inner sealing water-permeable filter layer 21 is made of a flexible material. Figure 3 In this embodiment, the inner sealed water-permeable filter layer 21 is a water-permeable filter cloth, and the water-permeable filter cloth adopts a nylon filter mesh not larger than 80 meshes. In this embodiment, the water-permeable filter cloth is a circle with a diameter equal to 1800 mm or a square with a side length not less than 1800 mm.

[0046] See also Figure 3-4 As shown, the inner sealed water-permeable filter layer 21 is unfolded inside the inner tube to form a plane. The inner sealed water-permeable filter layer 21 includes a filter layer body 211 and a connecting flange 212. The connecting flange 212 is folded toward the pipe mouth. The edge of the inner sealed water-permeable filter layer 21 is pressed to the inner wall of the end of the inner tube connecting end 11 by the outwardly opened fastening inner support ring 22. The fastening inner support ring 22 is fastened to the connecting flange 212. The connecting flange 212 is convenient for fixing in the tube. The water-permeable filter cloth forms the first filter layer to help filter mud and sand.

[0047] See also Figure 4-8As shown, the fastening inner support ring 22 is made of steel, including a ring body 221 and a ring end connection structure. The ring body 221 is made of 40mm×40mm×4mm galvanized angle steel and is bent into a circular ring with a diameter of 1560mm. The ring end connection structure includes two connecting pieces 222 formed by the connecting port of the ring body being vertically bent inwardly and formed in opposition to each other, and a bidirectional bolt. The bidirectional bolt includes a screw rod 223 and an inner support nut 225 located at both ends of the screw rod 223. The left and right halves of the screw rod 223 are provided with external threads in opposite directions. The connecting piece 222 A connecting sheet hole 224 is formed on the upper surface, and an inner support nut 225 is welded on the outer side corresponding to the position of the connecting sheet hole 224. An inner thread adapted to the screw rod on the corresponding side is formed in the inner support nut 225. The two ends of the screw rod 223 pass through the inner support nut 225 and the connecting sheet hole 224 on the corresponding side in sequence. The outer thread of the screw rod 223 is threadedly connected with the inner support nut 225 on the corresponding side and is limited by the inner support nut 225. The rotation of the screw rod 223 in two directions drives the distance change of the connecting sheets 222 on both sides to change the expansion and contraction size of the ring body 221. The inner support nut 225 is arranged on the outer side of the connecting sheet to play a tightening role.

[0048] See also Figure 9-15 As shown, the outer sealing structure 3 is covered on the outer wall of the pipe mouth of the inner tube connecting end 11, including a circular outer sealing water-permeable filter cover 31 and a fastening limiter 32. The outer sealing water-permeable filter cover 31 is a rigid material, and in this embodiment is made of galvanized iron sheet. The outer sealing water-permeable filter cover 31 includes a filter cover body 311 and an outer sealing cover ring 312. The diameter of the filter cover body 311 is 1630 mm. The outer sealing cover ring 312 is a buckle ring formed by a vertical plane at the end of the filter cover body 311. The inner diameter of the buckle ring is not less than the outer diameter of the inner tube, and the ring width of the buckle ring is not greater than the length of the inner tube connecting end extending out of the outer covering insulation layer. The buckle ring is sleeved on the inner tube connecting end 11.

[0049] See also Figure 9-11 As shown, a group of spaced limiting holes 314 are opened around the outer circumference of the outer sealing ring 312, and the fastening limiting member 32 includes a reinforcing steel ring 321 and an outer hoop bolt 322. The reinforcing steel ring 321 is clamped and covers the outer side of the limiting hole 314 for a circle, and the reinforcing steel ring 321 is fixedly connected to the outer sealing ring 312. Reinforcing holes 315 corresponding to the limiting holes 314 are opened on the reinforcing steel ring 321 at positions corresponding to the limiting holes 314, and outer hoop nuts 323 are welded on the reinforcing steel ring 321 at the positions of the reinforcing holes 315. The outer hoop bolts 322 pass through the reinforcing holes 315 and the limiting holes 314 in sequence to be threadedly connected to the outer hoop nut 323, and the top end of the outer hoop nut 323 is tightly pressed against the outer surface of the inner tube connecting end 11. There are eight limiting holes 314 arranged at intervals around the outer sealing ring 312, so there are also eight reinforcing holes 315 and outer hoop bolts 322 arranged correspondingly to fix the outer sealing water permeable filter cover 31 to be fastened to the pipe mouth. The height of the outer hoop bolts 322 after being fastened does not exceed the thickness of the outer covering insulation layer 12.

[0050] In this embodiment, the width of the outer sealing ring 312 is 200 mm. The reinforcing steel ring 321 is set at a position 50 mm away from the inner side of the outer sealing ring 312. The reinforcing steel ring 321 is made of galvanized flat steel, with a width of 40 mm and a thickness of 4 mm. The outer hoop bolt 32 uses a No. 20 bolt, and the setting of the outer hoop nut 314 can ensure that the outer hoop bolt 32 passes through to play a tightening role.

[0051] See also Fig.15 As shown, the filter cover body 311 is provided with filter holes 313, which are capsule-shaped holes, and the ratio of the hole length to the hole width of the filter hole 313 is 3:1, and the hole spacing is greater than 2 times the hole width. In this embodiment, the hole length is 30 mm, the hole width is 10 mm, and the hole spacing is 70 mm. The filter holes 313 are arranged along the center to 150 mm away from the outer cover ring 312.

[0052] The filter holes are used to filter mud and foreign matter with larger particle sizes. The filter holes 313 are arranged in concentric circles along the filter cover body 311. The filter holes 313 on each circle are arranged at equal distances, and the filter holes 313 between adjacent concentric circles have the same spacing.

[0053] The utility model provides a pipe orifice sealing structure for the anti-silt and anti-drifting pipe. The outer sealed water-permeable filter cover can filter larger floating objects and silt with larger particle sizes. The tightening inner support ring 22 is used to fix the inner sealed water-permeable filter layer, and double-layer filtration is achieved through the outer sealed water-permeable filter cover and the inner sealed water-permeable filter layer.

[0054] The use process of the utility model is as follows:

[0055] Step 1: prefabricate the inner sealing structure 2 and the outer sealing structure 2 according to the size of the circular tube 1, see Figure 1 As shown;

[0056] Step 2: unfold the inner sealed water-permeable filter layer 21 at the port position of the inner tube connection end 11, and bend out the connection flange 212, see Figure 4 As shown;

[0057] Step 3: Place the retractable inner support ring 22 into the position of the inner sealed permeable filter layer 21 of the port, and then temporarily support it according to the fixed position, and then rotate the screw 223 of the ring end connection structure to increase the distance between the connecting pieces 222 on both sides, so that the inner support ring 22 is opened and supported on the inner wall of the pipe mouth of the inner pipe connection end 11, see Figure 7 As shown;

[0058] Step 4: buckle the outer sealing water permeable filter cover 31 onto the outer side of the inner tube connecting end 11;

[0059] Step 5: Align the limiting hole 314 and the reinforcing hole 315, screw the outer hoop bolt 322, and thread the outer hoop bolt 322 and the outer hoop nut 321, so that the outer sealed water permeable filter cover 31 is fastened to the outer wall of the pipe opening of the inner pipe connection end 11 through the fastening limiting member 312, see Fig.13 shown.

Claims

1. A pipe orifice plugging structure for an anti-sand and anti-drift pipe, characterized in that: It comprises a circular tube body (1) of a long-distance heat supply pipe, an inner sealing structure (2) and an outer sealing structure (3), The circular tube body (1) comprises an inner tube and an outer thermal insulation layer (12), wherein the end of the inner tube extends beyond the edge of the outer thermal insulation layer (12) to form an inner tube connection end (11). The inner sealing structure (2) is sealed on the inner wall of the pipe opening of the inner pipe connection end (11), and comprises an inner sealing water-permeable filter layer (21) and a retractable inner support ring (22). The inner sealing water-permeable filter layer (21) is made of a flexible material. The inner sealing water-permeable filter layer (21) is unfolded inside the inner pipe to form a plane. The edge of the inner sealing water-permeable filter layer (21) is pressed against the inner wall of the end of the inner pipe connection end (11) by the outer-expanded inner support ring (22). The outer sealing structure (3) is covered on the outer wall of the pipe opening of the inner tube connection end (11), and comprises a circular outer sealing water-permeable filter cover (31) and a fastening stopper (32). The outer sealing water-permeable filter cover (31) is made of a rigid material, comprises a filter cover body (311) and an outer sealing cover ring (312), a filter hole (313) is formed on the filter cover body (311), and the outer sealing cover ring (312) is a buckle ring formed by a vertical plane at the end of the filter cover body (311), the inner diameter of the buckle ring is not less than the outer diameter of the inner tube, the ring width of the buckle ring is not greater than the length of the inner tube connection end extending out of the outer covering insulation layer, and the buckle ring is sleeved on the inner tube connection end (11). A group of spaced limiting holes (314) are formed around the outer circumference of the outer sealing ring (312). The fastening limiting member (32) comprises a reinforcing steel ring (321) and an outer hoop bolt (322). The reinforcing steel ring (321) is hooped and covers the outer circumference of the limiting hole (314). The reinforcing steel ring (321) is fixedly connected to the outer sealing ring (312). Reinforcing holes (315) corresponding to the limiting holes (314) are formed on the reinforcing steel ring (321). An outer hoop nut (323) is welded on the reinforcing steel ring (321) at the position of the reinforcing hole (315). The outer hoop bolt (322) passes through the reinforcing hole (315) and the limiting hole (314) in sequence and is threadedly connected to the outer hoop nut (323). The top end of the outer hoop nut (323) is pressed against the outer surface of the inner tube connecting end (11).

2. The pipe opening plugging structure of the anti-sediment and anti-drifting pipe according to claim 1 is characterized in that: The inner sealed water-permeable filter layer (21) comprises a filter layer body (211) and a connecting flange (212); the connecting flange (212) is folded toward the pipe opening, and the fastening inner support ring (22) is fastened to the connecting flange (212).

3. The pipe opening plugging structure of the anti-sand and anti-drifting pipe according to claim 2 is characterized in that: The inner sealed water-permeable filter layer (21) is a water-permeable filter cloth, and the water-permeable filter cloth adopts a nylon filter screen with a mesh size of no more than 80.

4. The pipe opening plugging structure of the anti-sediment and anti-drifting pipe according to claim 2 is characterized in that: The fastening inner support ring (22) is made of steel and includes a ring body (221) and a ring end connection structure. The ring end connection structure includes two connecting pieces (222) formed by vertically bending the connection port of the ring body (221) inwardly and facing each other, and a bidirectional bolt. The bidirectional bolt includes a screw rod (223) and an inner support nut (225) located at both ends of the screw rod (223). The left and right halves of the screw rod (223) are provided with external threads in opposite directions. The connecting piece (222) is provided with a connecting piece hole (224) corresponding to the position of the connecting piece hole (224). An inner support nut (225) is welded to the outer side of the inner support nut (225), and an inner thread adapted to the screw rod on the corresponding side is formed in the inner support nut (225). The two ends of the screw rod (223) pass through the inner support nut (225) on the corresponding side and the connecting plate hole (224) in sequence. The outer thread of the screw rod (223) is threadedly connected to the inner support nut (225) on the corresponding side and is limited by the inner support nut (225). The rotation of the screw rod (223) in two directions drives the distance between the connecting plates (222) on both sides to change the expansion and contraction size of the ring body (221).

5. The pipe opening plugging structure of the anti-sediment and anti-drifting pipe according to claim 1 is characterized in that: The outer sealed water-permeable filter cover (31) is made of galvanized iron sheet.

6. The pipe opening plugging structure of the anti-sediment and anti-drifting pipe according to claim 5 is characterized in that: The filter holes (313) are capsule-shaped holes, the ratio of the hole length to the hole width of the filter holes (313) is 3:1, the hole spacing is greater than twice the hole width, and the filter holes (313) are arranged along the center to a distance of 100 mm to 200 mm from the outer sealing ring (312).

7. The pipe opening plugging structure of the anti-sediment and anti-drifting pipe according to claim 5 or 6, characterized in that: The filter holes (313) are arranged in concentric circles along the filter cover body (311); the filter holes (313) on each circle are arranged at equal intervals, and the spacing between the filter holes (313) in adjacent concentric circles is the same.

8. The pipe opening plugging structure of the anti-sediment and anti-drifting pipe according to claim 1 is characterized by: The fastening and limiting member (32) is a screw, and eight limiting holes (314) are arranged at intervals around the outer sealing ring (312). The fastening and limiting members (32) are provided with eight.

9. The pipe opening plugging structure of the anti-sediment and anti-drifting pipe according to claim 1 is characterized by: The height of the outer hoop bolts (322) after being tightened does not exceed the thickness of the outer thermal insulation layer (12).

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