Large-diameter nodular cast iron jacking pipe pushing ring

Abstract

The utility model discloses a large-diameter nodular cast iron jacking pipe pushing ring, which belongs to the field of socket pipe jacking construction and comprises an annular body, a connecting plate and a fastener. The annular body is at least divided into three sections and is arranged between a pipe body vertical surface at the bottom of the ball pipe socket and the inner wall of the pipe body; the two ends of each connecting plate are attached to the ends of the two adjacent sections of annular bodies respectively, and the sectional type annular bodies are connected into a whole ring through fasteners. The large-diameter nodular cast iron socket pipe jacking device is applied to large-diameter nodular cast iron socket pipe jacking construction, the link of welding a pushing flange and a rib plate on a pipe body can be omitted, the influence of welding on the pipe is reduced, the production efficiency is improved, and the production cost is reduced; the pushing ring can be repeatedly used, saves energy, reduces consumption, is low-carbon and environment-friendly, and has very high practical value.

Description

Technical Field

[0001] The utility model relates to the field of socket and spigot pipe jacking construction, in particular to a large-diameter ductile iron jacking ring. Background Art

[0002] The existing trenchless ductile iron jacking pipe is one of the existing metal jacking technologies. It is a product used in trenchless jacking construction that is improved on the basis of ordinary ductile iron pipes. Figure 1 As shown, a certain thickness of cement mortar is lined on the outer wall of the ordinary ductile iron pipe to make the outer wall size of the pipe body consistent; and a thrust flange and reinforcing ribs are welded at the socket position, thereby forming a thrust force transmission structure that uses the socket thrust flange to push the socket end face, thereby realizing the jacking construction of the jacking pipe.

[0003] This type of ductile iron jacking product adopts the traditional slide-in interface and sealing rubber ring, which is reliable in sealing and easy to install. Its jacking flange and rib plate are fixed on the ordinary ductile iron pipe body by welding, which can withstand large jacking force, but the welding cost is high, the welding strength is large, and the production efficiency is low. Especially in the current market with strong demand for trenchless construction, the production efficiency and cost of this type of jacking seriously restrict the development of ductile iron pipes in the trenchless industry.

[0004] In the invention patent application with the Chinese patent application publication number CN106247009A, a metal pipe axial thrust transmission system is proposed, in which an annular flange is arranged at the contact position between the socket and the spigot of the ductile iron pipe. In the existing centrifugal casting process, it is difficult to produce the flange under the action of centrifugal force. Even if it is produced reluctantly, its forming rate and product structural stability are not high, far below the normal production and use standards.

[0005] Therefore, there is an urgent need to provide a ductile iron jacking pipe product with high production efficiency, low cost and easy use, so as to overcome the problems existing in the prior art such as "relying on the jacking flange to transmit force, high welding cost, low production efficiency, and possible changes in the pipe body structure and reduced performance after welding". Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a large-diameter ductile iron jacking ring. The large-diameter ductile iron socket jacking pipe uses the jacking ring to avoid the pipe body welding jacking flange and rib plate links, reduce the impact of welding on the pipe, improve production efficiency and reduce production costs.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A large-diameter ductile iron jacking ring comprises an annular body, a connecting plate and fasteners; the annular body is divided into at least three sections and is installed between the vertical surface of the pipe body at the bottom of the socket of the spherical pipe and the inner wall of the pipe body; the two ends of the connecting plate are respectively fitted with the ends of two adjacent sections of the annular body, and the segmented annular body is connected into a whole ring by fasteners.

[0009] The further improvement of the technical solution of the utility model is that: the push ring is annular as a whole, the outer diameter of the annular body is less than or equal to the inner diameter of the ball tube socket; the outer diameter of the positioning surface of the annular body is less than or equal to the inner diameter of the ball tube; the inner diameter of the push ring is smaller than the inner diameter of the ball tube.

[0010] A further improvement of the technical solution of the utility model is that the inner diameter of the push ring is ≥700mm.

[0011] The further improvement of the technical solution of the utility model lies in that: the cross-section of the annular body is "L"-shaped; the annular body is provided with a push surface, a positioning surface, a force transmission surface and a connecting hole; the push surface is an inclined surface, a plane or a concave surface; the positioning surface is a plane; the force transmission surface matches the bottom of the ball tube socket and the vertical surface of the tube body; after the push ring is installed, the force transmission surface fits with the bottom of the ball tube socket and the vertical surface of the tube body, and the positioning surface fits with the inner wall of the tube body; there is a gap between two adjacent sections of the annular body.

[0012] A further improvement of the technical solution of the utility model is that connecting holes are provided at both ends of each section of the annular body.

[0013] A further improvement of the technical solution of the utility model is that a handle is arranged on each section of the annular body.

[0014] A further improvement of the technical solution of the utility model is that: a circular through hole and a long strip through hole capable of adjusting the distance are opened on the connecting plate.

[0015] A further improvement of the technical solution of the utility model is that the width L1 of the connecting plate is not greater than the width L of the annular body.

[0016] A further improvement of the technical solution of the utility model is that: the connecting plate is in an arc shape, and its curvature is adapted to the curvature of the inner wall of the annular body.

[0017] A further improvement of the technical solution of the utility model is that the annular body is formed by machining or casting using black metal.

[0018] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is:

[0019] 1. The utility model provides a segmented annular body, which is connected by connecting plates and fasteners, thereby eliminating the need for welding the pipe body, pushing flanges and ribs, reducing the impact of welding on pipes, improving production efficiency and reducing production costs.

[0020] 2. During the jacking construction, even if the interface is slightly deflected, the jacking force can be transmitted to the pipe body through the jacking ring, thereby enhancing the construction safety.

[0021] 3. The utility model sets the push ring as a segmented structure, and connects it through a connecting plate and fasteners, which can be reused, saves energy and reduces consumption, is low-carbon and environmentally friendly, and has strong practical value.

[0022] 4. The utility model provides a handle on each section of the annular body, which facilitates the disassembly and installation of the push ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor;

[0024] Figure 1 It is a schematic diagram of the assembly of ductile iron jacking pipe in the prior art;

[0025] Figure 2 This is a schematic diagram of the assembly of the push ring and the ball tube body in the embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the assembly of the push ring in the embodiment of the utility model;

[0027] Figure 4 This is a cross-sectional schematic diagram of the annular body of the push ring in the embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of the connecting plate structure in an embodiment of the utility model;

[0029] Figure 6 Schematic diagram of other cross-sectional shapes of the annular body of the push ring in the embodiment of the utility model;

[0030] Among them, 1. socket of ball tube; 11. vertical surface of tube body; 12. inner wall of tube body; 2. socket of ball tube; 3. annular body; 31. push surface; 32. positioning surface; 33. force transmission surface; 34. outer wall; 35. connecting hole; 4. connecting plate; 41. circular through hole; 42. long strip through hole; 5. fastener; 6. handle; A. inner diameter of ball tube; B. inner diameter of socket of ball tube; C. outer diameter of positioning surface of annular body; D. outer diameter of annular body. DETAILED DESCRIPTION

[0031] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:

[0035] like Figure 2-5 As shown, a large-diameter ductile iron jacking ring includes an annular body 3, a connecting plate 4 and a fastener 5; the annular body 3 is divided into at least three sections and is installed between the vertical surface 11 of the tube body at the bottom of the tube socket 1 and the inner wall 12 of the tube body; the two ends of the connecting plate 4 are respectively fitted with the ends of the two adjacent sections of the annular body 3, and the segmented annular body 3 is connected into a whole ring through the fastener 5. The fastener 5 can be a hexagon socket bolt.

[0036] like Figure 2As shown, the ductile iron jacking pipe comprises a ball pipe body, a ball pipe socket 1 and a ball pipe insert 2. The bottom of the ball pipe socket 1 is provided with a pipe body vertical surface 11 and a pipe body inner wall 12.

[0037] Further, such as Figure 2 and Figure 4 As shown, the push ring is annular as a whole, the outer diameter D of the annular body is slightly smaller than or equal to the inner diameter B of the ball tube socket; the outer diameter C of the positioning surface of the annular body is slightly smaller than or equal to the inner diameter A of the ball tube; the inner diameter of the push ring is smaller than the inner diameter A of the ball tube.

[0038] Furthermore, the inner diameter of the push ring is ≥700 mm, and preferably, the inner diameter of the push ring is ≥1200 mm.

[0039] Further, such as Figure 2-4 As shown, the cross-section of the annular body 3 is "L"-shaped; the annular body 3 is provided with a push surface 31, a positioning surface 32, a force transmission surface 33 and a connecting hole 35; the push surface 31 is an inclined surface, a plane or a concave surface; the positioning surface 32 is a plane; the force transmission surface 33 matches the bottom of the ball tube socket 1 and the vertical surface 11 of the tube body; after the push ring is installed, the force transmission surface 33 fits with the bottom of the ball tube socket 1 and the vertical surface 11 of the tube body, and the positioning surface 33 fits with the inner wall 12 of the tube body; there is a gap between two adjacent sections of the annular body 3, and the specific gap distance is 5-10mm.

[0040] Further, such as Figure 3 and Figure 4 As shown, both ends of each section of the annular body 3 are provided with connecting holes 35. The connecting holes 35 can be specifically provided as threaded holes.

[0041] Further, such as Figure 3 As shown, each section of the annular body 3 is provided with a handle 6. Preferably, two handles 6 are provided on each section of the annular body 3. The number and position of the handles 6 (if one is provided, it is provided in the middle, if two are provided, they are provided at both ends) are determined according to the size and weight of each section of the annular body 3 to facilitate the installation and disassembly of each section of the annular body 3.

[0042] Further, such as Figure 5 As shown, a circular through hole 41 and a long strip through hole 42 capable of adjusting the distance are provided on the connecting plate 4, so as to facilitate the installation and removal of each section of the annular body 3.

[0043] Further, such as Figure 2 and Figure 5 As shown, the width L1 of the connecting plate 4 is not greater than the width L of the annular body 3 .

[0044] Further, as shown in Figure and Figure 5 As shown, the connecting plate 4 is in an arc shape, and its curvature is adapted to the curvature of the inner wall of the annular body 3 .

[0045] Furthermore, the annular body 3 is made of black metal by machining or casting.

[0046] Directions:

[0047] In the specific implementation, the socket sealing rubber ring is installed first, and then the annular body 3 is installed section by section between the vertical surface 11 of the tube body and the inner wall 12 of the tube body at the bottom of the ball tube socket 1, and the outer wall 34 of the annular body 3 is fitted with the inner wall of the bottom of the ball tube socket 1, and finally the segmented annular body 3 is connected into a whole ring by the fastener 5. Then another ball tube is inserted until the end of the ball tube socket 2 contacts the push surface 31 of the annular body 3, and the push construction is carried out, and the above steps are repeated until the construction of the entire pipeline is completed.

[0048] After the jacking construction is completed, the fasteners 5 and the connecting plate 4 are removed from the tube body of the ball tube, and then the segmented annular bodies 3 are taken out one by one through the handle 6 to achieve recycling.

[0049] like Figure 6 As shown, the cross-section of the annular body 3 of the pushing ring can also be other shapes as shown in (a), (b), (c), (d), (e), and (f) in the figure, or other deformations under the "L" shape, as long as the pushing can be achieved.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A large-diameter ductile iron jacking ring, characterized in that: The invention comprises an annular body (3), a connecting plate (4) and a fastener (5); the annular body (3) is divided into at least three sections and is installed between a vertical surface (11) of a tube body and an inner wall (12) of the tube body at the bottom of a ball tube socket (1); two ends of the connecting plate (4) are respectively fitted with the ends of two adjacent sections of the annular body (3), and the segmented annular body (3) is connected into a complete ring by the fastener (5).

2. A large-diameter ductile iron jacking ring according to claim 1, characterized in that: The push ring is annular as a whole, the outer diameter (D) of the annular body is less than or equal to the inner diameter (B) of the ball tube socket; the outer diameter (C) of the positioning surface of the annular body is less than or equal to the inner diameter (A) of the ball tube; the inner diameter of the push ring is smaller than the inner diameter (A) of the ball tube.

3. A large-diameter ductile iron jacking ring according to claim 2, characterized in that: The inner diameter of the push ring is ≥700mm.

4. A large-diameter ductile iron jacking ring according to claim 1, characterized in that: The cross section of the annular body (3) is "L"-shaped; the annular body (3) is provided with a push surface (31), a positioning surface (32), a force transmission surface (33) and a connecting hole (35); the push surface (31) is an inclined surface, a plane or a concave surface; the positioning surface (32) is a plane; the force transmission surface (33) matches the bottom of the ball tube socket (1) and the vertical surface (11) of the tube body; after the push ring is installed, the force transmission surface (33) fits the bottom of the ball tube socket (1) and the vertical surface (11) of the tube body, and the positioning surface (32) fits the inner wall (12) of the tube body; there is a gap between two adjacent sections of the annular body (3).

5. A large-diameter ductile iron jacking ring according to claim 1, characterized in that: Both ends of each annular body (3) are provided with connection holes (35).

6. A large-diameter ductile iron jacking ring according to claim 1, characterized in that: A handle (6) is provided on each section of the annular body (3).

7. A large-diameter ductile iron jacking ring according to claim 1, characterized in that: The connecting plate (4) is provided with a circular through hole (41) and a long strip through hole (42) capable of adjusting the distance.

8. The large-diameter ductile iron jacking ring according to claim 1, characterized in that: The width L1 of the connecting plate (4) is no greater than the width L of the annular body (3).

9. A large-diameter ductile iron jacking ring according to claim 1, characterized in that: The connecting plate (4) is in the shape of an arc, and its curvature is adapted to the curvature of the inner wall of the annular body (3).

10. A large-diameter ductile iron jacking ring according to claim 1, characterized in that: The annular body (3) is formed by machining or casting using black metal.

Images