Internal pulling device for PCCP (prestressed concrete cylinder pipe) installation

Abstract

The utility model discloses an inner pulling device for PCCP pipeline installation. The inner pulling device comprises an inner pulling and blocking assembly, an outer pulling and blocking assembly and a traction assembly used for pulling the inner pulling and blocking assembly and the outer pulling and blocking assembly to be close. The outer pulling and blocking assembly comprises a first vertical rod and a second vertical rod, a second vertical rod; the four arc-shaped plates are arranged at the two ends of the first vertical rod and the two ends of the second vertical rod respectively. The first pull rod is arranged on the first vertical rod and is further provided with a first mounting plate; a second pull rod; the push-pull oil cylinder is used for pushing and pulling the first mounting plate and the second mounting plate; the inner pulling and blocking assembly and the outer pulling and blocking assembly are the same in structure, and an arc-shaped plate of the outer pulling and blocking assembly is arranged in a connecting seam of the installed PCCP. The arc-shaped plates are arranged at the upper ends and the lower ends of the first vertical rod and the second vertical rod respectively, so that the contact area between the device and the PCCP is increased, damage to an inner opening of the PCCP caused by stress concentration is avoided, the pressure condition of the sealing rings can be reduced and optimized, excessive extrusion of the lower sealing rings is avoided, and the service life of the PCCP is prolonged. And the sealing performance of the pipeline sealing ring is protected.

Description

Technical Field

[0001] This utility model relates to the field of pipe jacking construction, specifically to an internal pull device for PCCP pipe installation. Background Technology

[0002] Prestressed concrete cylinder pipe is a composite pipe composed of steel plate, concrete, high-strength steel wire and cement mortar. It has the characteristics of high sealing performance, high strength and high impermeability, and is widely used in water transmission pipelines of large-scale water conservancy projects across regions.

[0003] Traditional PCCP pipeline installation primarily uses the internal pull method, which involves installing an internal pull-bar structure inside the already installed pipeline and an external pull-bar structure outside the pipeline to be installed. The internal and external pull-bar structures are connected by steel wire ropes and hand chain hoists. By manually pulling the hoist chain, the steel wire ropes are gradually tightened, thereby installing the pipeline to be installed in place. During the tightening process, the sealing ring between the pipes is compressed and deformed, thus achieving a sealing effect.

[0004] In existing internal tensioning construction methods, the internal tensioning structure is usually a horizontal brace structure. For example, Chinese patent CN202215871U discloses a PCCP finished pipe installation tensioning tool, in which both the internal and external tensioning points are simple horizontal brace structures. During tensioning, the pressure point of the pipe is mainly concentrated at the pipe end, which easily leads to eccentric pressure, causing excessive compression or even damage to the lower sealing ring, affecting the pipe's sealing performance. In addition, the simple horizontal brace structure has a small contact area with the inner end of the installed pipe, which easily leads to stress concentration during tensioning, damaging the inner end of the pipe. Utility Model Content

[0005] The purpose of this invention is to propose an internal pull device for PCCP pipeline installation, in order to solve the problems in the prior art where the internal and external pull structures are simple horizontal bracing structures, which easily lead to eccentric pressure at the pressure point of the pipeline, thus damaging the sealing ring, and the problem that stress concentration easily occurs during tensioning, damaging the internal thread of the pipeline.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] An internal pull-out device for PCCP pipeline installation includes an internal pull-out baffle assembly, an external pull-out baffle assembly, and a traction assembly for bringing the internal pull-out baffle assembly and the external pull-out baffle assembly closer together; the external pull-out baffle assembly includes:

[0008] First pole erected;

[0009] The second upright is parallel to the first upright;

[0010] Four arc-shaped plates, whose arcs match the curvature of the recessed end of the PCCP pipe to be installed, are respectively set at both ends of the first and second uprights;

[0011] The first tie rod is mounted on the first upright and is perpendicular to the first upright, and a first mounting plate is also provided perpendicular to the first tie rod.

[0012] The second tie rod is installed on the second upright and is perpendicular to the second upright. It is also provided with a second mounting plate perpendicular to the second tie rod.

[0013] A push-pull cylinder, parallel to the first pull rod, has its two ends fixedly connected to the first mounting plate and the second mounting plate respectively, and is used to push and pull the first mounting plate and the second mounting plate;

[0014] The inner pull-block assembly has the same structure as the outer pull-block assembly. The arc plate of the inner pull-block assembly matches the arc of the groove at the concave end of the PCCP pipe connection joint and is set inside the PCCP pipe connection joint.

[0015] Specifically, the first uprights of the inner and outer pull-bar components are respectively provided with a first connecting groove, and the second uprights of the inner and outer pull-bar components are respectively provided with a second connecting groove; the traction component includes two electric hoists, one electric hoist is connected to the two first connecting grooves at both ends, and the other electric hoist is connected to the two second connecting grooves at both ends.

[0016] Furthermore, each of the two electric hoists has a steel hook at its top and another steel hook at the bottom of each electric hoist's chain hoist. One electric hoist passes through the first connecting groove via the two steel hooks and is then hooked onto the edge of the first connecting groove, while the other electric hoist passes through the second connecting groove via the two steel hooks and is then hooked onto the edge of the second connecting groove.

[0017] Furthermore, both electric hoists are equipped with connecting chains at the top; the connecting chain at the top of one electric hoist passes through a first connecting slot and connects to a locking block, while the bottom chain passes through another first connecting slot and connects to another locking block.

[0018] The connecting chain at the top of another electric hoist passes through a second connecting slot and connects to a third locking block, while the chain hoist at the bottom passes through another second connecting slot and connects to a fourth locking block.

[0019] The size of the card block is larger than the size of the first connecting slot and the second connecting slot.

[0020] Specifically, the first and second pull rods are two U-shaped openings facing away from each other, and the first mounting plate extends toward the direction of the second pull rod.

[0021] Specifically, the first and second pull rods have transverse strip grooves in the middle, and the horizontal screw passes through the two transverse strip grooves and then has limit nuts screwed into both ends.

[0022] Furthermore, two horizontal screws are arranged side by side.

[0023] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0024] 1. This utility model increases the contact area with the PCCP pipe by setting arc-shaped plates at the upper and lower ends of the first and second uprights, thereby avoiding stress concentration that could damage the inner end of the pipe.

[0025] 2. This utility model uses a push-pull hydraulic cylinder in conjunction with a mounting plate, a first pull rod, and a second pull rod to adjust the spacing between the first and second uprights, adapting to PCCP pipes of different sizes and effectively increasing the applicability of this utility model device. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the end face structure of the device of this utility model.

[0027] Figure 2 This is a cross-sectional structural diagram of the device of this utility model inside the pipeline.

[0028] Figure 3 This is a schematic diagram showing the connection relationship between the pull rod and the push-pull cylinder.

[0029] Figure 4 This is a schematic diagram showing the connection relationship between the connecting chain and the first upright in another embodiment.

[0030] The labels in the diagram are as follows: First upright pole—1; Arc plate—2; First tie rod—301; Second tie rod—302; First mounting plate—401; Second mounting plate—402; Second upright pole—5; Push-pull cylinder—6; First connecting groove—701; Second connecting groove—702; Electric hoist—8; Steel hook—9; Locking block—10; Connecting chain—11; Horizontal strip groove—12; Horizontal screw—13; Limit nut—14. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model, so as to provide a better understanding of the concept of the present utility model, the technical problem solved, the technical features constituting the technical solution and the technical effects brought about.

[0032] like Figure 1 , Figure 2 and Figure 3 As shown, an internal pull device for PCCP pipeline installation includes an internal pull-stop assembly, an external pull-stop assembly, and a traction assembly for pulling the internal pull-stop assembly and the external pull-stop assembly closer together; the external pull-stop assembly includes:

[0033] First pole 1;

[0034] The second upright post 5 is parallel to the first upright post 1;

[0035] Four arc-shaped plates 2, which match the curvature of the groove at the recessed end of the PCCP pipe to be installed, are respectively set at both ends of the first upright 1 and the second upright 5;

[0036] A first tie rod 301 is mounted on the first upright 1 and is perpendicular to the first upright 1. A first mounting plate 401 is also provided perpendicular to the first tie rod 301.

[0037] The second tie rod 302 is mounted on the second upright 5 and is perpendicular to the second upright 5. A second mounting plate 402 perpendicular to the second tie rod 302 is also provided.

[0038] The push-pull cylinder 6 is parallel to the first pull rod 301, and its two ends are fixedly connected to the first mounting plate 401 and the second mounting plate 402 respectively. It is used to push and pull the first mounting plate 401 and the second mounting plate 402 to adjust the distance between the first upright 1 and the second upright 5.

[0039] The inner pull-block assembly has the same structure as the outer pull-block assembly. The arc plate 2 of the inner pull-block assembly matches the arc of the groove at the concave end of the PCCP pipe connection joint and is set inside the PCCP pipe connection joint.

[0040] The usage process of this utility model is as follows: First, install the inner pull-stop assembly. First, place the first upright 1 and the second upright 5 into the joint of the installed pipe. Then, adjust their overall orientation to ensure that the first pull rod 301 and the second pull rod 302 are on the same plane. Then, install and fix the push-pull cylinder 6 by welding or bolting to ensure that the distance between the first upright 1 and the second upright 5 can be adjusted normally when the push-pull cylinder 6 extends and retracts. By controlling the extension of the push-pull cylinder 6, the arc plates 2 at both ends of the first upright 1 and the second upright 5 can be in close contact with the inner joint of the installed PCCP pipe. At the same time, their positions can be adjusted to match the groove shape of the recessed end of the PCCP pipe, realizing the initial pre-tightening installation of the inner pull-stop structure. This increases the contact area, optimizes the stress on the pipe end, and also optimizes the pressure on the sealing ring when setting the sealing ring, avoiding excessive compression of the lower sealing ring and protecting the sealing performance of the pipe sealing ring.

[0041] Next, install the external pull-out assembly. Specifically, first place a wooden wrench at the outer opening of the PCCP pipe to be installed, then adjust the positions of the first upright (1) and the second upright (5) of the external pull-out assembly. The subsequent installation method is the same as that of the internal pull-out assembly. Finally, install the traction assembly. By tightening the traction assembly, pull the PCCP pipe to be installed into the already installed PCCP pipe, completing the overall installation.

[0042] In a preferred embodiment, the first upright 1 of the inner and outer pull-bar components is also provided with a first connecting groove 701, and the second upright 5 of the inner and outer pull-bar components is also provided with a second connecting groove 702; the traction component includes two electric hoists 8, one electric hoist 8 is connected to the two first connecting grooves 701 at both ends, and the other electric hoist 8 is connected to the two second connecting grooves 702 at both ends.

[0043] In this embodiment, a specific structure of a traction assembly is provided. The traction assembly uses an electric hoist 8 to achieve automatic pulling. The electric hoist 8 is connected to the first upright 1 of both the outer and inner pull-stop assemblies via a first connecting groove 701. During connection, it is important to ensure that both ends of the electric hoist 8 are connected to the upright on the same side to ensure that the PCCP pipe to be installed can be smoothly pulled in when the electric hoist 8 is tightened. The second upright 5 of the inner and outer pull-stop assemblies are handled similarly.

[0044] As a further embodiment, the top of each of the two electric hoists 8 is provided with a steel hook 9, and the bottom chain hoist of each of the two electric hoists 8 is provided with another steel hook 9; one electric hoist 8 passes through the first connecting groove 701 through the two steel hooks 9 and is then hung on the edge of the first connecting groove 701, and the other electric hoist 8 passes through the second connecting groove 702 through the two steel hooks 9 and is then hung on the edge of the second connecting groove 702.

[0045] In this embodiment, an implementable connection method is provided between the electric hoist 8 and the first upright 1 and the second upright 5. Specifically, the electric hoist 8 is connected to the first connecting groove 701 of the two first uprights 1 using steel hooks 9, thereby facilitating the quick installation and subsequent quick disassembly of the electric hoist 8. The second upright 5 is connected in the same way.

[0046] As a further embodiment, both electric hoists 8 are provided with connecting chains 11 at their tops; the connecting chain 11 at the top of one electric hoist 8 passes through a first connecting groove 701 and is connected to a locking block 10, and the bottom chain passes through another first connecting groove 701 and is connected to another locking block 10.

[0047] The connecting chain 11 at the top of another electric hoist 8 passes through a second connecting slot 702 and connects to the third locking block 10, and the bottom chain hoist passes through another second connecting slot 702 and connects to the fourth locking block 10;

[0048] The size of the card block 10 is larger than the size of the first connecting groove 701 and the second connecting groove 702.

[0049] In this embodiment, as Figure 4 As shown, another structure for connecting the electric hoist 8 and the inner and outer pull-stop components is provided. Specifically, one end of the electric hoist 8 is a chain hoist, and the other end is equipped with a connecting chain 11. After the chain hoist and the connecting chain 11 pass through the first uprights 1 on both sides, they are connected to the locking blocks 10 by either bypassing them or by connecting buckles. This allows the locking blocks 10 to serve as load-bearing points when the electric hoist 8 tightens the inner and outer pull-stop components, thus preventing deformation of the first connecting groove 701 on the load-bearing side due to unilateral force. The second upright 5 is handled similarly.

[0050] In a preferred embodiment, the first pull rod 301 and the second pull rod 302 are two U-shaped openings facing away from each other, and the first mounting plate 401 extends toward the second pull rod 302.

[0051] In this embodiment, by setting the first pull rod 301 and the second pull rod 302 of the inner pull-stop assembly and the outer pull-stop assembly into a U-shape with openings facing away from each other, the upper surface area of ​​the first pull rod 301 and the second pull rod 302 is increased, which facilitates the installation of the first mounting plate 401 and the second mounting plate 402. At the same time, it provides sufficient fixing positions for fixing the first mounting plate 401 and the second mounting plate 402, thereby increasing the overall load-bearing capacity of the first mounting plate 401 and the second mounting plate 402.

[0052] In a preferred embodiment, the first pull rod 301 and the second pull rod 302 have transverse strip grooves 12 in the middle. After the horizontal screw 13 passes through the two transverse strip grooves 12, limit nuts 14 are screwed into both ends.

[0053] In this embodiment, by setting a horizontal screw 13 with a limiting nut 14 and using the horizontal screw 13 to pass through the transverse strip groove 12, it is convenient to pre-fix the first pull rod 301 and the second pull rod 302 before installing the push-pull cylinder 6, which facilitates the adjustment of the position of the first upright 1 and the second upright 5. Alternatively, after the push is in place, the limiting nut 14 can be tightened to fix the relative position of the first pull rod 301 and the second pull rod 302, so as to avoid the change of the distance between the first upright 1 and the second upright 5 due to external vibration during construction.

[0054] As a further embodiment, two horizontal screws 13 are arranged side by side.

[0055] By setting two horizontal screws 13, it can be ensured that the movement direction of the first pull rod 301 and the second pull rod 302 is consistent when the subsequent push-pull cylinder 6 performs push-pull operations, thus avoiding the deviation of the movement direction of the first pull rod 301 and the second pull rod 302.

[0056] The terms "connection" and "fixing" appearing in this utility model description can refer to fixed connection, processing and forming, welding, or mechanical connection. The specific meaning of the above terms in this utility model should be understood according to the specific circumstances.

[0057] In the description of this utility model, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc., are used only to indicate the orientation or positional relationship for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An internal pull device for PCCP pipeline installation, comprising an internal pull-stop assembly, an external pull-stop assembly, and a traction assembly for pulling the internal pull-stop assembly and the external pull-stop assembly closer together; characterized in that, The external pull-out assembly includes: First upright (1); The second upright (5) is parallel to the first upright (1); Four arc-shaped plates (2) are set at both ends of the first upright (1) and the second upright (5), respectively, matching the arc of the groove at the recessed end of the PCCP pipe to be installed. The first tie rod (301) is set on the first upright (1) and is perpendicular to the first upright (1), and a first mounting plate (401) perpendicular to the first tie rod (301) is also provided. The second tie rod (302) is mounted on the second upright (5) and is perpendicular to the second upright (5). A second mounting plate (402) perpendicular to the second tie rod (302) is also provided. The push-pull cylinder (6) is parallel to the first pull rod (301), and its two ends are fixedly connected to the first mounting plate (401) and the second mounting plate (402) respectively, for pushing and pulling the first mounting plate (401) and the second mounting plate (402). The inner pull-block assembly has the same structure as the outer pull-block assembly. The arc plate (2) of the inner pull-block assembly matches the arc of the groove at the concave end of the PCCP pipe connection joint and is set inside the PCCP pipe connection joint.

2. The internal pull-out device for PCCP pipe installation as described in claim 1, characterized in that, The first upright (1) of the inner and outer pull-bar components is also provided with a first connecting groove (701), and the second upright (5) of the inner and outer pull-bar components is also provided with a second connecting groove (702); the traction component includes two electric hoists (8), one electric hoist (8) is connected to two first connecting grooves (701) at both ends, and the other electric hoist (8) is connected to two second connecting grooves (702) at both ends.

3. The internal pull-out device for PCCP pipe installation as described in claim 2, characterized in that, The top of each of the two electric hoists (8) is provided with a steel hook (9), and the bottom of each of the two electric hoists (8) is provided with another steel hook (9); one electric hoist (8) passes through the first connecting groove (701) through the two steel hooks (9) and is then hung on the edge of the first connecting groove (701); the other electric hoist (8) passes through the second connecting groove (702) through the two steel hooks (9) and is then hung on the edge of the second connecting groove (702).

4. The internal pull-out device for PCCP pipe installation as described in claim 2, characterized in that, Both electric hoists (8) are provided with connecting chains (11) at the top; the connecting chain (11) at the top of one electric hoist (8) passes through a first connecting groove (701) and is connected to a locking block (10), and the bottom chain passes through another first connecting groove (701) and is connected to another locking block (10). The connecting chain (11) at the top of another electric hoist (8) passes through a second connecting slot (702) and connects to the third locking block (10), and the bottom chain passes through another second connecting slot (702) and connects to the fourth locking block (10). The size of the card block (10) is larger than the size of the first connecting groove (701) and the second connecting groove (702).

5. The internal pull-out device for PCCP pipe installation as described in claim 1, characterized in that, The first pull rod (301) and the second pull rod (302) are two U-shaped openings facing away from each other, and the first mounting plate (401) extends toward the second pull rod (302).

6. The internal pull-out device for PCCP pipe installation as described in claim 1, characterized in that, The first pull rod (301) and the second pull rod (302) have transverse strip grooves (12) in the middle. After the horizontal screw (13) passes through the two transverse strip grooves (12), limit nuts (14) are screwed into both ends respectively.

7. An internal pull-out device for PCCP pipe installation as described in claim 6, characterized in that, The horizontal screws (13) are arranged in two parallel rows.

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