Assembly type working well of rain sewage pipe network

Abstract

An assembly type working well of a rain sewage pipe network comprises a first pipe joint and a second pipe joint which are spliced with each other, the opposite end faces of the first pipe joint and the second pipe joint are provided with a protruding ring and a positioning groove which are inserted with each other, and the outer wall face of the second pipe joint is fixedly provided with a plurality of locking nuts which are circumferentially arranged around the center axis of the second pipe joint. The multiple locking nuts are located at the height positions corresponding to the positioning grooves, and the inner wall face of the first pipe joint is provided with multiple radial fastening bolts which penetrate through the protruding ring and the positioning grooves and are connected with the multiple locking nuts. According to the utility model, the working well has good structural strength, and the pipe joints are convenient to replace in the later period.

Description

Technical Field

[0001] The utility model relates to an assembled working well of a rainwater and sewage pipe network, belonging to the field of municipal rainwater and sewage pipe networks. Background Art

[0002] The municipal rainwater and sewage pipe network is an important part of urban infrastructure construction, which is directly related to the city's drainage function and environmental protection.

[0003] A stormwater and sewage network consists of vertical pipe assemblies installed below ground level, commonly known as pipe pits. Pipe pit construction is one of the key steps in stormwater and sewage network construction. It typically utilizes factory-prefabricated standard pipe sections and on-site assembly. This approach standardizes, modularizes, and accelerates pit construction, improving construction efficiency, reducing on-site workload, and minimizing environmental impact.

[0004] The assembly connection between pipe sections must not only consider the structural strength and sealing of the rainwater and sewage pipe working shaft after assembly, but also the convenience of subsequent maintenance and the damage to components during the assembly process.

[0005] The Chinese patent application number 201920407484.X discloses an assembled working pit structure and construction process for sewage pipe jacking construction, which includes an upper ring body, a lower ring body and several sections of middle ring bodies connected between the upper ring body and the lower ring body; the two ends of the two side walls of the middle ring body are respectively provided with several grooves evenly opened along the circumference, and the two side end faces of the middle ring body are respectively provided with through holes connected to the grooves; the lower part of the upper ring body and the upper part of the lower ring body are both provided with the same grooves and through holes as the middle ring body along the circumference; bolts are passed through the through holes of adjacent ring bodies, and the ends of the bolts are threadedly connected with lock nuts; a jacking hole is opened on one of the middle ring bodies close to the lower ring body; a positioning groove is opened on one end face of the middle ring body, and a ridge cooperating with the positioning groove is provided on the other end face, and the ridge is stuck in the positioning groove; a sealing ring is provided between adjacent ring bodies.

[0006] In this technical solution, the upper ring body, the middle ring body and the lower ring body are essentially pipe segments. A number of grooves are evenly opened along the circumferential direction at both ends of the two side walls of the pipe segments, and bolts are used to pass through the grooves to connect the upper and lower pipe segments into a whole. That is, the inside and outside of the pipe segments are connected, which can make the working pit have good structural strength. However, it is inconvenient to replace the pipe segments later. Specifically, it is necessary to remove the bolts on the inside and outside to disconnect the two connected pipe segments. Before removing the outer bolts, the soil on the outside of the pipe segment must be removed, and a large amount of excavation must be performed to form a space outside the working pit that allows workers to operate.

[0007] In addition, this technical solution can improve the sealing performance of the working shaft of the rainwater and sewage pipe by arranging sealing rings between adjacent pipe sections. However, the sealing rings are easily damaged when the pipe sections are spliced ​​together. Specifically, when the lower pipe section is socketed with the upper pipe section, if the two are not aligned, the sealing ring will be subjected to uneven force and damaged. Utility Model Content

[0008] In response to the deficiencies in the prior art, the present application provides an assembled working pit for a rainwater and sewage pipe network, which at least solves one of the technical problems.

[0009] A prefabricated working pit of a rainwater and sewage pipe network comprises a pipe segment 1 and a pipe segment 2 which are spliced ​​together, the end faces of the pipe segment 1 and the pipe segment 2 facing each other having convex rings and positioning grooves which are inserted into each other, the outer wall surface of the pipe segment 2 being fixedly provided with a plurality of locking nuts which are arranged circumferentially around the central axis of the pipe segment 2, the plurality of locking nuts being located at heights corresponding to the positioning grooves, the inner wall surface of the pipe segment 1 being provided with a plurality of radial fastening bolts which pass through the convex rings and the positioning grooves and are connected to the plurality of locking nuts.

[0010] Preferably, a sealing gasket is provided between the head of the radial fastening bolt and the inner wall surface of the pipe segment 1. The sealing gasket is sleeved on the radial fastening bolt and has an arc-shaped sealing surface whose shape matches the inner wall surface of the pipe segment 1.

[0011] Preferably, a welding piece for welding to the locking nut is embedded in the second pipe segment.

[0012] Preferably, the inner wall of the pipe segment 1 and the inner wall of the pipe segment 2 are respectively provided with an annular mounting part 1 and an annular mounting part 2 at the joint, and the annular mounting part 1 and the annular mounting part 2 are respectively coaxially arranged with the pipe segment 1 and the pipe segment 2; the surfaces of the annular mounting part 1 and the annular mounting part 2 are jointly installed with a sealing ring for sealing the gap between the annular mounting part 1 and the annular mounting part 2.

[0013] Preferably, the annular mounting part 1 is provided with a clamping groove 1 which is coaxially arranged with the annular mounting part, and the annular mounting part 2 is provided with a clamping groove 2 which is coaxially arranged with the annular mounting part 2, and the sealing ring includes a clamping ring part 1 and a clamping ring part 2 which are correspondingly clamped in the clamping groove 1 and the clamping groove 2.

[0014] Preferably, the first clamping ring portion and the second clamping ring portion are water-swellable rubber sealing portions.

[0015] Preferably, the sealing ring includes a lower annular fitting portion that fits against the lower surface of the annular mounting portion one, and an upper annular fitting portion that fits against the upper surface of the annular mounting portion two; it also includes a lower pressure ring for making the lower annular fitting portion fit against the annular mounting portion one, and an upper pressure ring for making the upper annular fitting portion fit against the annular mounting portion two.

[0016] Preferably, the lower pressure ring and the upper pressure ring are both composed of multiple ring segments.

[0017] Preferably, the annular segment includes a horizontally arranged vertical pressure portion and a side pressure portion connected to the vertical pressure portion.

[0018] In summary, the present invention has the following beneficial effects:

[0019] 1. This utility model uses a locking nut fixed to the outer wall of one of the spliced ​​pipe sections, and a radial fastening bolt installed on the inner wall of the other spliced ​​pipe section. The radial fastening bolts and locking nut are connected to connect the two pipe sections, providing the working well with good structural strength. Furthermore, when a pipe section needs to be replaced, workers only need to unscrew the radial fastening bolt inside the pipe section to disconnect the two connected pipe sections. Consequently, extensive excavation of the soil outside the pipe section is unnecessary, making pipe section replacement more convenient.

[0020] 2. In the present invention, the joined pipe sections are provided with an annular mounting portion 1 and an annular mounting portion 2 at the joints. A sealing ring for sealing the gap between the annular mounting portion 1 and the annular mounting portion 2 is mounted on both surfaces of the annular mounting portion 1 and the annular mounting portion 2. This installation method of the sealing ring facilitates its later replacement. At the same time, the installation of the sealing ring is not affected by the splicing or assembly of the pipe sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the first type of prefabricated working pit;

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is the assembly drawing of the sealing gasket and radial fastening bolts;

[0024] Figure 4 This is a structural diagram of the second type of prefabricated working pit;

[0025] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0026] Figure 6 : is the position relationship diagram of the upper pressure ring and the lower pressure ring;

[0027] Figure 7 Schematic diagram of the structure of the ring segment. DETAILED DESCRIPTION

[0028] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0029] Example:

[0030] An assembled working well of a rainwater and sewage pipe network, such as Figure 1-3 As shown, it includes a pipe section 1 and a pipe section 2 that are spliced ​​together. The end faces of the pipe section 1 and the pipe section 2 facing each other have a convex ring 11 and a positioning groove 21 that are inserted into each other. The outer wall surface of the pipe section 2 is fixedly provided with a plurality of locking nuts 3 arranged circumferentially around the central axis of the pipe section 2. When fixed, the locking nuts 3 can be fixed by welding with welding pieces pre-buried in the pipe section 2. The plurality of locking nuts 3 are located at the height corresponding to the positioning groove 21. The inner wall surface of the pipe section 1 is provided with a plurality of radial fastening bolts 4 that pass through the convex ring 11 and the positioning groove 21 and are connected to the plurality of locking nuts 3. The two pipe sections are connected by the connection between the radial fastening bolts 4 and the locking nuts 3, so that the working well has good structural strength. At the same time, when the pipe section needs to be replaced, the worker only needs to unscrew the radial fastening bolts 4 inside the pipe section to disconnect the two connected pipe sections. Therefore, there is no need to excavate a large amount of soil outside the pipe section, and the replacement of the pipe section is relatively convenient.

[0031] A sealing gasket 5 is provided between the head of the radial fastening bolt 4 and the inner wall surface of the pipe segment 1. The sealing gasket 5 is sleeved on the radial fastening bolt 4. The sealing gasket 5 has an arc-shaped sealing surface 51 whose shape matches the inner wall surface of the pipe segment 1. On the one hand, the sealing gasket 5 is in sealing contact with the head of the radial fastening bolt 4, and on the other hand, it is in sealing contact with the inner wall surface of the pipe segment 1, thereby improving the sealing performance of the working well at the radial fastening bolt 4.

[0032] The inner wall of the pipe segment 1 and the inner wall of the pipe segment 2 are respectively provided with an annular mounting portion 12 and an annular mounting portion 22 at the joint, and the annular mounting portion 12 and the annular mounting portion 22 are respectively coaxially arranged with the pipe segment 1 and the pipe segment 2. The protruding arrangement of the annular mounting portion 12 and the annular mounting portion 22 does not affect the structural strength of the pipe segment 1 at the position where the annular mounting portion 12 is provided, nor does it affect the structural strength of the pipe segment 2 at the position where the annular mounting portion 22 is provided. A sealing ring 6 is installed on the surfaces of the annular mounting portion 12 and the annular mounting portion 22. The sealing ring 6 is connected to the annular mounting portion 12 and the annular mounting portion 22. The two annular mounting parts 22 are coaxially arranged, and the sealing ring 6 is used to seal the gap between the annular mounting part 12 and the annular mounting part 22, so as to realize the sealing between the pipe sections. Since the sealing ring 6 is arranged on the surface of the annular mounting part 12 and the annular mounting part 22, on the one hand, it is convenient to replace it later. When replacing, the operation can be carried out directly inside the pipe section without disconnecting the connection between the pipe sections and lifting the upper pipe section. On the other hand, the pipe sections can be connected to each other and then installed on the annular mounting part 12 and the annular mounting part 22. The installation of the sealing ring 6 is not affected by the splicing or assembly between the pipe sections, so the sealing ring 6 is not easily damaged when the pipe sections are spliced.

[0033] To facilitate installation of the sealing ring 6, the annular mounting portion 12 is provided with a first retaining groove 13 coaxially disposed therewith, and the second annular mounting portion 22 is provided with a second retaining groove 23 coaxially disposed therewith. The sealing ring 6 includes a first retaining ring portion 61 and a second retaining ring portion 62, which are respectively retained in the first retaining groove 13 and the second retaining groove 23. The first retaining ring portion 61 and the second retaining ring portion 62 are water-swellable rubber seals, which secure the sealing ring 6 tightly in the two retaining grooves, thereby achieving good sealing performance.

[0034] Figure 4-6 A second installation method of the sealing ring 6 is provided, wherein the sealing ring 6 includes a lower annular fitting portion 63 fitted to the lower surface of the annular mounting portion 12, and an upper annular fitting portion 64 fitted to the upper surface of the annular mounting portion 22. The lower annular fitting portion 63 and the annular mounting portion 12 are coaxially arranged, and the upper annular fitting portion 64 and the annular mounting portion 22 are coaxially arranged. In order to ensure the fitting quality and sealing effect, it also includes a lower pressure ring 7 for making the lower annular fitting portion 63 fit on the annular mounting portion 12, and an upper pressure ring 8 for making the upper annular fitting portion 64 fit on the annular mounting portion 22. The lower pressure ring 7 and the upper pressure ring 8 are respectively connected to the annular mounting portion 12 and the annular mounting portion 22 by a plurality of fasteners 9. The fasteners 9 can be but are not limited to screws.

[0035] Because of the presence of annular mounting portion 12 and annular mounting portion 22 on the pipe joint, to ensure that the lower pressure ring 7 and the upper pressure ring 8 can be easily installed into the pipe joint and thus facilitate the installation of the sealing ring 6, the lower pressure ring 7 and the upper pressure ring 8 adopt a segmented structure. That is, the lower pressure ring 7 and the upper pressure ring 8 are each composed of multiple annular segments 7-8-1. The annular segments 7-8-1 may be connected to each other, or of course, they may not be connected to each other. In this case, the number of annular segments corresponding to the lower pressure ring 7 and the upper pressure ring 8 is four.

[0036] like Figure 7 As shown, the annular segment 7-8-1 includes a horizontally arranged vertical pressure portion 7-8-11 and a side pressure portion 7-8-12 connected to the vertical pressure portion 7-8-11. The vertical pressure portion 7-8-11 corresponding to the lower pressure ring 7 presses the lower annular fitting portion 63 upward, and the vertical pressure portion 7-8-11 corresponding to the upper pressure ring 8 presses the upper annular fitting portion 64 downward. The side pressure portion 7-8-12 is used to laterally press the portion of the sealing ring 6 located between the lower annular fitting portion 63 and the upper annular fitting portion 64 onto the annular mounting portion 1 12 and the annular mounting portion 2 22, thereby improving the fitting effect between the sealing ring 6 and the annular mounting portion 12 and the annular mounting portion 2 22, thereby further improving the sealing performance.

[0037] The above embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the concept and scope of the present invention. Any modifications and improvements to the technical solution of the present invention made by a person of ordinary skill in the art without departing from the design concept of the present invention shall fall within the scope of protection of the present invention. The technical content sought to be protected by the present invention is fully set forth in the claims.

Claims

1. An assembled working pit of a rainwater and sewage pipe network, comprising a pipe section 1 (1) and a pipe section 2 (2) spliced ​​together, wherein the end surfaces of the pipe section 1 (1) and the pipe section 2 (2) facing each other have a convex ring (11) and a positioning groove (21) inserted into each other, characterized in that: The outer wall surface of the pipe section 2 (2) is fixedly provided with a plurality of locking nuts (3) arranged in a circumferential manner around the central axis of the pipe section 2 (2), and the plurality of locking nuts (3) are located at a height corresponding to the positioning groove (21). The inner wall surface of the pipe section 1 (1) is provided with a plurality of radial fastening bolts (4) passing through the convex ring (11) and the positioning groove (21) and connected to the plurality of locking nuts (3).

2. The assembled working pit of the rainwater and sewage pipe network according to claim 1 is characterized in that: A sealing gasket (5) is provided between the head of the radial fastening bolt (4) and the inner wall surface of the pipe section (1). The sealing gasket (5) is sleeved on the radial fastening bolt (4). The sealing gasket (5) has an arcuate sealing surface (51) whose shape matches the inner wall surface of the pipe section (1).

3. The assembled working pit of the rainwater and sewage pipe network according to claim 1 is characterized in that: A welding piece for welding to the locking nut (3) is embedded in the second pipe section (2).

4. The assembled working pit of the rainwater and sewage pipe network according to claim 1, characterized in that: The inner wall of the pipe section 1 (1) and the inner wall of the pipe section 2 (2) are respectively provided with an annular mounting portion 1 (12) and an annular mounting portion 2 (22) at the joint, and the annular mounting portion 1 (12) and the annular mounting portion 2 (22) are respectively coaxially arranged with the pipe section 1 (1) and the pipe section 2 (2); A sealing ring (6) for sealing the gap between the annular mounting part (12) and the annular mounting part (22) is installed on the surfaces of the annular mounting part (12) and the annular mounting part (22).

5. The assembled working pit of the rainwater and sewage pipe network according to claim 4 is characterized in that: The annular mounting portion 1 (12) is provided with a clamping groove 1 (13) coaxially arranged with the annular mounting portion 1 (12), and the annular mounting portion 2 (22) is provided with a clamping groove 2 (23) coaxially arranged with the annular mounting portion 2 (22), and the sealing ring (6) includes a clamping ring portion 1 (61) and a clamping ring portion 2 (62) correspondingly clamped in the clamping groove 1 (13) and the clamping groove 2 (23).

6. The assembled working pit of the rainwater and sewage pipe network according to claim 5, characterized in that: The first clamping ring portion (61) and the second clamping ring portion (62) are water-swellable rubber sealing portions.

7. The assembled working pit of the rainwater and sewage pipe network according to claim 4, characterized in that: The sealing ring (6) comprises a lower annular fitting portion (63) fitted to the lower surface of the annular mounting portion (12) and an upper annular fitting portion (64) fitted to the upper surface of the annular mounting portion (22). It also includes a lower pressure ring (7) for making the lower annular fitting portion (63) fit on the annular mounting portion 1 (12), and an upper pressure ring (8) for making the upper annular fitting portion (64) fit on the annular mounting portion 2 (22).

8. The assembled working pit of the rainwater and sewage pipe network according to claim 7, characterized in that: The lower pressure ring (7) and the upper pressure ring (8) are both composed of a plurality of ring segments (7-8-1).

9. The assembled working pit of the rainwater and sewage pipe network according to claim 8, characterized in that: The annular segment (7-8-1) comprises a horizontally arranged vertical pressure portion (7-8-11) and a side pressure portion (7-8-12) connected to the vertical pressure portion (7-8-11).

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