A reverse stopping device for preventing pipe section from retreating during rectangular pipe jacking construction

Abstract

The present application relates to sinking well pipe jacking construction technology field, specifically is related to a kind of for preventing pipe section from retreating reverse stop device when rectangular pipe jacking construction, including support;Multiple clamping grooves are set on the side wall of pipe section, and blocking unit is provided on the support, and the blocking unit includes clamping block moving along horizontal direction, clamping block is slidably connected with the support along horizontal direction, first roller is rotationally arranged on the end of pipe section towards clamping block, iron plate is covered in clamping groove, and iron plate is also provided along the extension direction of pipe section at the opening of clamping groove, electromagnet is provided in clamping block, clamping block has first stop position and second stop position when sliding on the support, when clamping block is on first stop position, first roller does not contact with the side wall of pipe section, when clamping block moves to second stop position, clamping block is clamped with clamping groove.This application can automatically lock pipe section, prevent pipe section from retreating, improve engineering operation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of open caisson pipe jacking construction, in particular to a reverse stopping device for preventing pipe joint retreat during rectangular pipe jacking construction. BACKGROUND

[0002] In the process of open caisson pipe jacking construction, a large number of engineering practices show that it is difficult to manually remove the temporary plugging structure of the pipe jacking portal, and there is a great safety hazard: during the removal process, the integrity of the temporary plugging structure is destroyed and is in an unstable state, which can easily lead to soil collapse at the pipe jacking portal and endanger the personal safety of the operating personnel.

[0003] Chinese patent application CN116927806A discloses a pipe jacking construction method, which adopts an open caisson as described above, and the steps include: S1, prefabricating the well body, reserving the pipe jacking portal and the through hole on the well body, checking the quality and size of the pipe jacking portal and the quality and size of the through hole; S2, inserting the structural reinforcement into the pipe jacking portal from the through hole; S3, after the insertion of the structural reinforcement is completed, setting the solidified material layer in the pipe jacking portal; S4, sinking the open caisson to the place to be constructed; S5, after the open caisson is sunk to the lowest point, installing a pipe jacking machine and debugging, jacking the pipe jacking machine so that the cutter head of the pipe jacking machine tightly abuts against the pipe jacking portal; S6, pulling out the structural reinforcement, continuing to jack the pipe jacking machine so that the cutter head of the pipe jacking machine opens the solidified material layer, and subsequent pipe jacking construction is carried out.

[0004] Although the above-mentioned scheme avoids safety hazards and reduces construction difficulty, during pipe jacking operation, a jack is usually used to jack the pipe joint into the portal, and the pushing force of the jack during operation can reach 1200 tons. When the jack is withdrawn from one end of the jacked pipe joint, the pipe joint will retreat, and the pipe joint will also have a risk of left-right displacement during retreat. The existing response method is to weld a triangular frame on site, and to reserve a bolt hole on the pipe joint. A bolt is inserted into the bolt hole from one end of the fixed triangular frame, but this method has low working efficiency, and the bolt itself is a long strip structure, which is easy to bend after long-term use. In addition, it is necessary to ensure that the pipe joint can be pushed into the specified position by the jack, otherwise the bolt cannot be smoothly inserted into the bolt hole. SUMMARY

[0005] In order to solve the above problems, the application provides a reverse stopping device for preventing pipe sections from retreating during rectangular pipe construction, which comprises a support arranged on one side of the pipe section, a plurality of clamping grooves are evenly arranged on the side wall of the pipe section along the extension direction of the pipe section, a blocking unit is arranged on the support, the blocking unit comprises a clamping block moving along the horizontal direction, the clamping block is slidingly connected with the support along the horizontal direction, a first roller is rotatably arranged on the end of the clamping block facing the pipe section, an iron plate is arranged in the clamping groove, and an iron plate is also arranged at the opening of the clamping groove along the extension direction of the pipe section, an electromagnet is arranged in the clamping block, the clamping block has a first stop position and a second stop position when sliding on the support, when the clamping block is at the first stop position, the first roller is not in contact with the side wall of the pipe section, when the electromagnet is powered on, the clamping block moves from the first stop position to the second stop position, the first roller is in contact with the iron plate on the side wall of the pipe section, and the clamping block is clamped with the clamping groove when the clamping block moves to the second stop position.

[0006] In order to solve the above problems, the application provides a reverse stopping device for preventing pipe sections from retreating during rectangular pipe construction, which comprises a support arranged on one side of the pipe section, a plurality of clamping grooves are evenly arranged on the side wall of the pipe section along the extension direction of the pipe section, a blocking unit is arranged on the support, the blocking unit comprises a clamping block moving along the horizontal direction, the clamping block is slidingly connected with the support along the horizontal direction, a first roller is rotatably arranged on the end of the clamping block facing the pipe section, an iron plate is arranged in the clamping groove, and an iron plate is also arranged at the opening of the clamping groove along the extension direction of the pipe section, an electromagnet is arranged in the clamping block, the clamping block has a first stop position and a second stop position when sliding on the support, when the clamping block is at the first stop position, the first roller is not in contact with the side wall of the pipe section, when the electromagnet is powered on, the clamping block moves from the first stop position to the second stop position, the first roller is in contact with the iron plate on the side wall of the pipe section, and the clamping block is clamped with the clamping groove when the clamping block moves to the second stop position.

[0007] Preferably, an inclined chamfer is arranged at one end of the clamping groove away from the advancing direction of the pipe section, the number of clamping blocks arranged on the support is the same as the number of clamping grooves arranged on the pipe section and corresponds one by one, the spacing between adjacent clamping grooves is the same as the spacing between adjacent clamping blocks, and the first roller is rollingly connected with the inclined chamfer.

[0008] Preferably, a supporting unit is arranged on one side of the clamping block to support the clamping block, the supporting unit is located on the side opposite to the stress position of the clamping block and the clamping groove after the clamping block is clamped with the clamping groove, and the supporting unit and the clamping block form a triangular structure.

[0009] Preferably, the supporting unit comprises a first locking plate slidingly arranged on the support along the extension direction of the pipe section, a first one-way tooth is evenly arranged on the side of the first locking plate away from the pipe section, a connecting rod is arranged between the first locking plate and the clamping block, the two ends of the connecting rod are hingedly connected with the clamping block and the first locking plate, a second locking plate is arranged on the side of the first locking plate away from the pipe section, the second locking plate moves along the horizontal direction, the moving direction of the second locking plate is perpendicular to the extension direction of the pipe section, a second one-way tooth is evenly arranged on the side of the second locking plate facing the first locking plate, and the first one-way tooth and the second one-way tooth are in one-way engagement.

[0010] Preferably, the abutting plate is arranged on the side of the second locking plate away from the first locking plate, the shortest distance between the abutting plate and the second locking plate forms a straight line parallel to the horizontal plane, a gap is arranged between the abutting plate and the second locking plate, a spring is arranged in the gap along the arrangement direction of the abutting plate and the second locking plate, and the two ends of the spring are fixedly connected with the abutting plate and the second locking plate respectively.

[0011] Preferably, an electric push rod is horizontally arranged at the end of the abutting plate away from the second locking plate, the end of the electric push rod is fixedly connected with the end of the abutting plate, and the electric push rod drives the abutting plate to move in the horizontal direction; when the electromagnet in the clamping block is electrified, the output end of the electric push rod is in the longest state, and when the electromagnet is de-energized, the output end of the electric push rod is completely retracted.

[0012] Preferably, a guide rail is fixedly arranged on the support along the extension direction of the pipe joint, and the guide rail and the first locking plate are in sliding fit along the extension direction of the pipe joint.

[0013] Preferably, a push-pull unit is arranged on the end of the clamping block away from the pipe joint, the push-pull unit comprises a water tank arranged on the side of the clamping block away from the pipe joint, the water tank moves in the vertical direction, a supporting wheel is rotatably arranged on the support at the upper portion of the water tank, a connecting belt is arranged between the water tank and the clamping block, the two ends of the connecting belt are fixedly connected with the water tank and the clamping block respectively, the connecting belt is wound from the upper portion of the supporting wheel and is in contact with the supporting wheel, and the supporting wheel and the connecting belt are in rolling fit.

[0014] Preferably, a storage tank is arranged on one side of the water tank, water is stored in the storage tank, a water supply pipe is arranged between the storage tank and the water tank, the water tank is in communication with the storage tank through the water supply pipe, and a water pump is arranged on the water supply pipe, the water pump is used for pumping the water in the storage tank into the water tank or pumping the water in the water tank into the storage tank.

[0015] Preferably, a second roller is arranged on each side of the clamping block, the second roller is in contact with the side wall of the pipe joint of the clamping groove when the clamping block is in clamping fit with the clamping groove, and the axis of the second roller is parallel to the height direction of the support.

[0016] The beneficial effects of the present application compared with the prior art are:

[0017] 1. In the process of sinking well pipe jacking operation, first place the pipe jacking horizontally, then use the jack to push the pipe jacking into the portal horizontally, a support is arranged on one side of the pipe joint, a blocking unit is arranged on the support, when the jack is in operation, the electromagnet arranged in the clamping block is not started temporarily, when the jack completes the installation of the pipe joint according to the pre-set program, the electromagnet arranged in the clamping block is energized, at this time the area of the pipe joint side wall where the iron plate is arranged passes through the front end of the clamping block. When the clamping groove on the pipe joint side wall passes through the end of the clamping block, the clamping block can be smoothly inserted into the clamping groove, thereby realizing clamping. The clamping block has a first stop position and a second stop position when moving in the horizontal direction, when the clamping block is at the first stop position, the electromagnet is in a non-energized state, the clamping block is retracted into the support, and the first roller at the end of the clamping block is not in contact with the side wall of the pipe joint. When it is necessary to clamp the pipe joint to prevent the pipe joint from retreating, at this time the part of the pipe joint side wall where the iron plate is arranged is located at the front end of the clamping block, but the clamping groove does not pass through the front end of the clamping block, then the electromagnet is energized, the electromagnet attracts the clamping block to the side wall of the pipe joint, and the first roller at the end of the clamping block is in rolling engagement with the side wall of the pipe joint, at this time the clamping block has not reached the second stop position. After the clamping block contacts the side wall of the pipe joint, the jack continues to push the pipe joint forward towards the portal, as the pipe joint moves, the clamping groove arranged on the pipe joint moves synchronously with the pipe joint, when the clamping groove moves to the front end of the clamping block, the clamping block slides into the clamping groove and completes clamping engagement with the clamping groove, thereby ensuring that after the jack pushes the pipe joint, the blocking unit can automatically lock the pipe joint to prevent the pipe joint from retreating, thereby improving the efficiency of the engineering operation.

[0018] 2. The first roller arranged at the end of the clamping block is in rolling engagement with the side wall of the pipe joint after contacting the side wall, thereby avoiding direct contact and sliding engagement between the end of the clamping block and the side wall of the pipe joint, and ensuring that the clamping block will not scratch the side wall of the pipe joint.

[0019] 3. By arranging the support unit, when the clamping block is clamped in the clamping groove, the pipe joint retreat force will not act entirely on the clamping block, but can be shared by the support unit, thereby avoiding bending of the clamping block when clamped in the clamping groove. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a perspective view of a pipe joint fixed by a reverse stopping device for preventing pipe joint retreat during rectangular pipe jacking construction, and the pipe joint is in the portal and the direction of pipe joint movement is marked.

[0021] Figure 2 It is a perspective view of a pipe joint fixed by a reverse stopping device for preventing pipe joint retreat during rectangular pipe jacking construction.

[0022] Figure 3It is a kind of reverse stop device for preventing pipe section from retreating in rectangular top pipe construction Figure 2 The local enlarged schematic view of A in the figure.

[0023] Figure 4 It is a kind of reverse stop device for preventing pipe section from retreating in rectangular top pipe construction Figure 1 .

[0024] Figure 5 It is a kind of reverse stop device for preventing pipe section from retreating in rectangular top pipe construction Figure 2 .

[0025] Figure 6 It is a kind of reverse stop device for preventing pipe section from retreating in rectangular top pipe construction Figure 5 The local enlarged schematic view of B in the figure.

[0026] Figure 7 It is a kind of reverse stop device for preventing pipe section from retreating in rectangular top pipe construction

[0027] Figure 8 It is a kind of reverse stop device for preventing pipe section from retreating in rectangular top pipe construction Figure 7 The local enlarged schematic view of C in the figure.

[0028] Figure 9 It is a kind of reverse stop device for preventing pipe section from retreating in rectangular top pipe construction

[0029] Figure 10 It is a kind of reverse stop device for preventing pipe section from retreating in rectangular top pipe construction Figure 9 The local enlarged schematic view of D in the figure.

[0030] The figure label is:

[0031] 1, pipe section; 11, clamping groove; 12, iron plate; 2, blocking unit; 21, clamping block; 211, second roller; 22, first roller; 23, support unit; 231, connecting rod; 232, first locking plate; 233, second locking plate; 234, spring; 235, abutting plate; 236, extension rod; 237, electric push rod; 238, guide rail; 24, push-pull unit; 241, water tank; 242, connecting belt; 243, supporting wheel; 244, storage box; 245, water supply pipe; 3, support. DETAILED DESCRIPTION

[0032] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in detail below in combination with the drawings and specific embodiments.

[0033] Refer toFigures 1-4 and Figure 8 The application discloses a reverse stopping device for preventing pipe sections from retreating during rectangular top pipe construction, which comprises a support 3 arranged on one side of a pipe section 1, a plurality of clamping grooves 11 evenly arranged on the side wall of the pipe section 1 along the extension direction of the pipe section 1, a blocking unit 2 arranged on the support 3, the blocking unit 2 comprising a clamping block 21 moving along the horizontal direction, the clamping block 21 being in sliding fit with the support 3 along the horizontal direction, a first roller 22 being arranged on the end of the pipe section 1 and rotating towards the clamping block 21, an iron plate 12 being arranged in the clamping groove 11 and along the extension direction of the pipe section 1, an electromagnet being arranged in the clamping block 21, the clamping block 21 having a first stop position and a second stop position when sliding on the support 3, the first roller 22 not being in contact with the side wall of the pipe section 1 when the clamping block 21 is at the first stop position, the clamping block 21 moving from the first stop position to the second stop position after the electromagnet is powered on, the first roller 22 being in contact with the iron plate 12 on the side wall of the pipe section 1 when the clamping block 21 moves to the second stop position, and the clamping block 21 being in clamping fit with the clamping groove 11.

[0034] During the top pipe construction, the pipe section 1 is usually hoisted into a caisson, then the pipe section 1 is arranged horizontally and a jack is arranged at one end of the pipe section 1, the end of the pipe section 1 is driven by the jack, the pipe section 1 is slid into a hole, and the construction is completed, however, the pipe section 1 will retreat when the jack is removed after the pipe section 1 is driven into the hole, and the pipe section 1 will deviate left and right during the retreat. In order to prevent the pipe section 1 from deviating during the driving construction, the reverse stopping device is arranged on one side of the pipe section 1, the existing reverse stopping device is a triangular frame welded by steel materials, the clamping grooves 11 are arranged on the pipe section 1, then the bolt is inserted through the triangular frame and is in clamping fit with the clamping grooves 11. However, the above method has the following disadvantages: the bolt needs to be positioned manually every time, the existing bolt is a common metal rod structure, the bolt will be bent after long time use, the bolt cannot be accurately aligned with the clamping grooves 11, the installation time is long, the whole process needs manual operation, and the work is time-consuming and laborious, and the engineering progress is seriously affected.

[0035] In order to avoid the above situation, the check device is redesigned, the specific structure and working principle are as follows, when the caisson pipe jacking operation is carried out, first, the pipe is placed horizontally, then the pipe is pushed into the portal along the horizontal direction by the jack, the support 3 is arranged on one side of the pipe joint 1, the blocking unit 2 is arranged on the support 3, when the jack is in operation, the electromagnet arranged in the clamping block 21 is not started temporarily, when the jack completes the installation of the pipe joint 1 according to the pre-set program, the electromagnet arranged in the clamping block 21 is energized, at this time, the area of the pipe joint 1 side wall on which the iron plate 12 is arranged passes through the front end of the clamping block 21. It is worth noting that the energization time of the electromagnet also needs to be pre-set, the specific electromagnet starting time needs to be determined according to the actual situation, but it needs to be ensured that the clamping groove 11 on the pipe joint 1 reaches the clamping block 21 before the electromagnet in the clamping block 21 is energized, so that the electromagnet after energization can make the clamping block 21 contact with the pipe joint 1 side of the front end of the clamping groove 11 first. When the clamping groove 11 on the side wall of the pipe joint 1 passes through the end of the clamping block 21, the clamping block 21 can be smoothly inserted into the clamping groove 11, so as to realize clamping. The clamping block 21 has a first stop position and a second stop position when moving along the horizontal direction, when the clamping block 21 is located at the first stop position, the electromagnet is in a non-energized state, the clamping block 21 is retracted into the support 3, and the first roller 22 at the end of the clamping block 21 is not in contact with the side wall of the pipe joint 1, when it is needed to clamp the pipe joint 1 to prevent the pipe joint 1 from retreating, at this time, the part of the pipe joint 1 side wall on which the iron plate 12 is arranged is located at the front end of the clamping block 21, but the clamping groove 11 does not pass through the front end of the clamping block 21, then the electromagnet is energized, the electromagnet adsorbs the clamping block 21 on the side wall of the pipe joint 1, the first roller 22 at the end of the clamping block 21 is in rolling cooperation with the side wall of the pipe joint 1, at this time, the clamping block 21 has not reached the second stop position. When the clamping block 21 contacts with the side wall of the pipe joint 1, the jack continues to push the pipe joint 1 forward towards the portal, with the movement of the pipe joint 1, the clamping groove 11 arranged on the pipe joint 1 moves synchronously with the pipe joint 1, when the clamping groove 11 moves to the front end of the clamping block 21, the clamping block 21 slides into the clamping groove 11 and completes the clamping cooperation with the clamping groove 11, since the depth of the pipe joint 1 is pre-set, so that the clamping block 21 can be stopped in the clamping groove 11 by pre-setting the jack, the extension length control of the output end of the jack is the prior art, which will not be described here, so as to ensure that the jack can lock the pipe joint 1 after the pipe joint 1 is pushed in, prevent the pipe joint 1 from retreating, and improve the engineering operation efficiency.

[0036] Reference Figures 1-10The end of the clamping groove 11 away from the advancing direction of the pipe joint 1 is provided with an inclined chamfer, the clamping blocks 21 arranged on the support 3 are the same in number as the clamping grooves 11 arranged on the pipe joint 1 and one-to-one corresponding, the spacing between adjacent clamping grooves 11 is the same as the spacing between adjacent clamping blocks 21, and the first roller 22 is in rolling cooperation with the inclined chamfer.

[0037] In order to ensure the stability of the pipe joint 1 when it is fixed, the blocking unit 2 is provided with a plurality of clamping blocks 21, which are uniformly arranged on the support 3 along the extension direction of the pipe joint 1. As the pipe joint 1 is gradually pushed into the hole under the action of the jack, the clamping blocks 21 arranged horizontally on the support 3 on one side of the pipe joint 1 are in contact with the side wall of the pipe joint 1 in turn. This is because the electromagnets in the horizontally arranged clamping blocks 21 will be energized in turn as the pipe joint 1 advances. When the first clamping block 21 in contact with the side wall of the pipe joint 1 enters the clamping groove 11, the pipe joint 1 still continues to move at this time. Therefore, the inclined chamfer opened at one end of the clamping groove 11 can guide the clamping block 21 located in the clamping groove 11 to slide out and into the next clamping groove 11. When all the clamping blocks 21 are clamped into the clamping grooves 11, the jack stops working and is withdrawn. At this time, since the clamping blocks 21 clamp the clamping grooves 11, it is ensured that the pipe joint 1 will not retreat.

[0038] Referring to Figure 3 A support unit 23 is arranged on one side of the clamping block 21 to support the clamping block 21. After the clamping block 21 is clamped with the clamping groove 11, the support unit 23 is located on the opposite side of the force position of the clamping block 21 and the clamping groove 11. The support unit 23 and the clamping block 21 form a triangular structure.

[0039] Referring to Figure 8 and Figure 9 The support unit 23 includes a first locking plate 232 slidingly arranged on the support 3 along the extension direction of the pipe joint 1. The side of the first locking plate 232 away from the pipe joint 1 is uniformly provided with first one-way teeth. A connecting rod 231 is arranged between the first locking plate 232 and the clamping block 21. The two ends of the connecting rod 231 are respectively hinged to the clamping block 21 and the first locking plate 232. A second locking plate 233 is arranged on the side of the first locking plate 232 away from the pipe joint 1. The second locking plate 233 moves in the horizontal direction, and the moving direction of the second locking plate 233 is perpendicular to the extension direction of the pipe joint 1. The side of the second locking plate 233 facing the first locking plate 232 is uniformly provided with second one-way teeth. The first one-way teeth and the second one-way teeth are in one-way engagement.

[0040] Referring to Figure 10The abutting plate 235 is provided on the side of the second locking plate 233 away from the first locking plate 232, and the shortest distance between the abutting plate 235 and the second locking plate 233 forms a straight line parallel to the horizontal plane. A gap is formed between the abutting plate 235 and the second locking plate 233. A spring 234 is arranged in the gap along the arrangement direction of the abutting plate 235 and the second locking plate 233. The two ends of the spring 234 are fixedly connected with the abutting plate 235 and the second locking plate 233 respectively. An extension rod 236 is horizontally fixed on the side of the second locking plate 233 facing the abutting plate 235. The extension rod 236 penetrates the end of the abutting plate 235 and is in sliding cooperation with the abutting plate 235.

[0041] Referring to Figure 9 and Figure 10 The abutting plate 235 is provided on the side of the second locking plate 233 away from the first locking plate 232, and the shortest distance between the abutting plate 235 and the second locking plate 233 forms a straight line parallel to the horizontal plane. A gap is formed between the abutting plate 235 and the second locking plate 233. A spring 234 is arranged in the gap along the arrangement direction of the abutting plate 235 and the second locking plate 233. The two ends of the spring 234 are fixedly connected with the abutting plate 235 and the second locking plate 233 respectively. An extension rod 236 is horizontally fixed on the side of the second locking plate 233 facing the abutting plate 235. The extension rod 236 penetrates the end of the abutting plate 235 and is in sliding cooperation with the abutting plate 235.

[0042] When the electromagnet in the clamping block 21 starts to be powered, at this time the output end of the electric push rod 237 is in a fully extended state, the second one-way tooth on the second locking plate 233 meshes with the first one-way tooth on the first locking plate 232, and the first locking plate 232 can only move in the extension direction of the pipe section 1. Since the first locking plate 232 is hinged to one side of the clamping block 21 through the connecting rod 231, when the clamping block 21 moves towards the side wall of the pipe section 1, the clamping block 21 pulls the first locking plate 232 through the connecting rod 231, and the first locking plate 232 moves in the extension direction of the pipe section 1 when the clamping block 21 moves. At this time, the first one-way tooth on the first locking plate 232 and the second one-way tooth on the second locking plate 233 are staggered and meshed, that is, as the first locking plate 232 moves in the extension direction of the pipe section 1, the second locking plate 233 reciprocates in the horizontal direction. After the first one-way tooth on the first locking plate 232 pushes the second locking plate 233 away, the second locking plate 233 is reset again under the action of the spring 234, so that the second one-way tooth on the second locking plate 233 and the first one-way tooth on the first locking plate 232 are always in contact. And due to the one-way meshing of the first one-way tooth and the second one-way tooth, after the clamping block 21 contacts the side wall of the pipe section 1, even if the clamping block 21 has not been clamped with the clamping groove 11, the clamping block 21 will not retreat. When the clamping block 21 is clamped with the clamping groove 11, it can also ensure that the clamping block 21 is stably clamped with the clamping groove 11. Since the clamping block 21 and the clamping groove 11 are provided with a plurality of clamping blocks 21 and clamping grooves 11, the first few clamping blocks 21 need to slide out of the clamping groove 11 when clamped with the first few clamping grooves 11. At this time, the clamping block 21 will retreat, so the electric push rod 237 needs to retract the abutting plate 235, so that the second locking plate 233 is disconnected with the first locking plate 232. When the first roller 22 slides out of the clamping groove 11, the output end of the electric push rod 237 is fully extended again, so that the clamping rod can be smoothly clamped into the next clamping groove 11. When all the clamping rods are clamped with the clamping groove 11, the worker connects the new pipe section 1 with the pipe section 1 at the end of the top-in hole door and connects the new pipe section 1 at the end through the jack. At this time, the clamping block 21 can slide out of the clamping groove 11, the electric push rod 237 retracts the second locking plate 233, the second locking plate 233 no longer contacts the first locking plate 232, and the second locking plate 233 no longer locks the first locking plate 232. At this time, the clamping block 21 can smoothly slide out of the clamping groove 11.

[0043] With reference to Figure 8 The guide rail 238 is fixedly arranged on the support 3 in the extension direction of the pipe section 1 and is in sliding fit with the first locking plate 232 in the extension direction of the pipe section 1.

[0044] In this way, it is ensured that the first locking plate 232 can only move in the extension direction of the pipe section 1.

[0045] With reference to Figure 5 andFigure 6 A push-pull unit 24 is arranged on the end of the clamping block 21 away from the pipe joint 1. The push-pull unit 24 comprises a water tank 241 arranged on the side of the clamping block 21 away from the pipe joint 1, the water tank 241 being movable in the vertical direction. A support wheel 243 is rotatably arranged on the support 3 at the upper portion of the water tank 241. A connecting belt 242 is arranged between the water tank 241 and the clamping block 21, the two ends of the connecting belt 242 being fixedly connected with the water tank 241 and the clamping block 21 respectively. The connecting belt 242 is wound around the upper portion of the support wheel 243 and is in rolling contact with the support wheel 243.

[0046] With reference to Figure 7 And Figure 9 A storage tank 244 is arranged on the side of the water tank 241, and water is stored in the storage tank 244. A water supply pipe 245 is arranged between the storage tank 244 and the water tank 241, and the water tank 241 is in communication with the storage tank 244 through the water supply pipe 245. A water pump is arranged on the water supply pipe 245, and the water pump is used to pump water in the storage tank 244 into the water tank 241 or to pump water in the water tank 241 into the storage tank 244.

[0047] Before the electromagnet is energized, the water pump pumps the water in the water tank 241 into the storage tank 244, so that the suction force of the electromagnet after being energized cannot be weakened by the self-gravity of the water tank 241 containing water. After the clamping block 21 completes the reverse stopping work on the pipe joint 1, the electromagnet is de-energized, and the water pump is started at the same time. The water pump pumps the water in the storage tank 244 into the water tank 241. After the water tank 241 is filled with water, the weight of the water tank 241 increases continuously. The water tank 241 pulls the clamping block 21 out of the clamping groove 11 through the connecting belt 242, so as to realize the unlocking of the clamping block 21 and the clamping groove 11.

[0048] With reference to Figure 8 A second roller 211 is arranged on each side of the clamping block 21. The second roller 211 is in contact with the sidewall of the pipe joint 1 on the side of the clamping groove 11 when the clamping block 21 is clamped and matched with the clamping groove 11. The axis of the second roller 211 is parallel to the height direction of the support 3.

[0049] When the clamping block 21 is inserted into the clamping groove 11, the electromagnet in the clamping block 21 is in a continuous energized state, and the first roller 22 at the end of the clamping block 21 is in contact with the bottom of the clamping groove 11, and under the action of the suction force of the electromagnet, the first roller 22 generates a larger pressure on the bottom of the clamping groove 11, and the clamping block 21 stops the reverse of the pipe joint 1, and the clamping block 21 needs to be stationary in the clamping groove 11 for a period of time, and at this time the electromagnet is in a continuous energized state, and the contact surface of the first roller 22 with the bottom of the clamping groove 11 is small, and the first roller 22 is under a large stress, in order to avoid the first roller 22 from being stressed alone, a second roller 211 is arranged on both sides of the clamping block 21, and when the clamping block 21 is inserted into the clamping groove 11, the second roller 211 and the first roller 22 are stressed together, avoiding the deformation of the first roller 22 stressed alone.

[0050] Working principle: in the process of sinking well pipe jacking operation, first place the pipe jacking horizontally, then use the jack to push the pipe jacking into the portal in horizontal direction, the support 3 is arranged on one side of the pipe joint 1, the blocking unit 2 is arranged on the support 3, when the jack is in running state, the electromagnet arranged in the clamping block 21 is not started temporarily, when the jack completes the installation of the pipe joint 1 according to the pre-set program, the electromagnet arranged in the clamping block 21 is electrified, at this time the area of the pipe joint 1 side wall which is provided with the iron plate 12 passes through the front end of the clamping block 21. It is worth noting that the electrification time of the electromagnet needs to be pre-set, the specific electromagnet starting time needs to be determined according to the actual situation, but it needs to be ensured that the clamping groove 11 on the pipe joint 1 reaches the front end of the clamping block 21 before the electromagnet in the clamping block 21 is electrified, so that the electromagnet after electrification can make the clamping block 21 contact with the pipe joint 1 side first. When the clamping groove 11 on the pipe joint 1 side wall passes through the end of the clamping block 21, the clamping block 21 can be inserted into the clamping groove 11, so as to realize clamping. The clamping block 21 has a first stop position and a second stop position when moving in horizontal direction, when the clamping block 21 is located at the first stop position, the electromagnet is in non-electricity state, the clamping block 21 is retracted into the support 3, the first roller 22 at the end of the clamping block 21 is not in contact with the side wall of the pipe joint 1, when it is needed to clamp the pipe joint 1 to prevent the pipe joint 1 from retreating, at this time the part of the pipe joint 1 side wall which is provided with the iron plate 12 is located at the front end of the clamping block 21, but the clamping groove 11 does not pass through the front end of the clamping block 21, then the electromagnet is electrified, the electromagnet adsorbs the clamping block 21 on the side wall of the pipe joint 1, the first roller 22 at the end of the clamping block 21 is in rolling cooperation with the side wall of the pipe joint 1, at this time the clamping block 21 does not reach the second stop position. When the clamping block 21 contacts with the side wall of the pipe joint 1, the jack continues to push the pipe joint 1 forward to the portal direction, with the movement of the pipe joint 1, the clamping groove 11 arranged on the pipe joint 1 moves synchronously with the pipe joint 1, when the clamping groove 11 moves to the front end of the clamping block 21, the clamping block 21 slides into the clamping groove 11 and completes clamping cooperation with the clamping groove 11, so as to ensure that the blocking unit 2 can automatically lock the pipe joint 1 after the jack pushes the pipe joint 1, to prevent the pipe joint 1 from retreating, and improve the engineering operation efficiency.

[0051] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the protection scope of the present application. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which belongs to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A reverse stopping device for preventing pipe sections from retreating during rectangular pipe jacking construction, comprising a support (3) arranged on one side of a pipe section (1); characterized in that A plurality of clamping grooves (11) are evenly arranged on the side wall of the pipe section (1) along the extension direction of the pipe section (1), a blocking unit (2) is arranged on the support (3), the blocking unit (2) comprises a clamping block (21) moving in the horizontal direction, the clamping block (21) is in sliding fit with the support (3) in the horizontal direction, a first roller (22) is rotatably arranged on the end of the clamping block (21) facing the pipe section (1), the clamping groove (11) is covered with an iron plate (12), and the iron plate (12) is also arranged at the opening of the clamping groove (11) along the extension direction of the pipe section (1), an electromagnet is arranged in the clamping block (21), the clamping block (21) has a first stop position and a second stop position when sliding on the support (3), when the clamping block (21) is at the first stop position, the first roller (22) is not in contact with the side wall of the pipe section (1), after the electromagnet is energized, the clamping block (21) moves from the first stop position to the second stop position, the first roller (22) is in contact with the iron plate (12) on the side wall of the pipe section (1), and when the clamping block (21) moves to the second stop position, the clamping block (21) is clamped with the clamping groove (11); A support unit (23) is arranged on one side of the clamping block (21) to support the clamping block (21), after the clamping block (21) is clamped with the clamping groove (11), the support unit (23) is located on the opposite side of the force position of the clamping block (21) and the clamping groove (11), and the support unit (23) and the clamping block (21) form a triangular structure; The support unit (23) comprises a first locking plate (232) slidingly arranged on the support (3) along the extension direction of the pipe section (1), a plurality of first one-way teeth are evenly arranged on the side of the first locking plate (232) away from the pipe section (1), a connecting rod (231) is arranged between the first locking plate (232) and the clamping block (21), the two ends of the connecting rod (231) are hingedly connected with the clamping block (21) and the first locking plate (232) respectively, a second locking plate (233) is arranged on the side of the first locking plate (232) away from the pipe section (1), the second locking plate (233) moves in the horizontal direction, the moving direction of the second locking plate (233) is perpendicular to the extension direction of the pipe section (1), a plurality of second one-way teeth are evenly arranged on the side of the second locking plate (233) facing the first locking plate (232), and the first one-way teeth and the second one-way teeth are in one-way engagement.

2. A reverse stopping device for preventing the retreat of pipe sections during the construction of a rectangular pipe, according to claim 1, characterized in that, An inclined chamfer is arranged at one end of the clamping groove (11) away from the advancing direction of the pipe section (1), the number of clamping blocks (21) arranged on the support (3) is the same as and corresponds to the number of clamping grooves (11) arranged on the pipe section (1), the spacing between adjacent clamping grooves (11) is the same as the spacing between adjacent clamping blocks (21), and the first roller (22) is in rolling fit with the inclined chamfer.

3. A reverse stopping device for preventing the retreat of pipe sections during the construction of a rectangular pipe, according to claim 1, characterized in that, The second locking plate (233) is provided with an abutting plate (235) on the side away from the first locking plate (232), a straight line formed by the shortest distance between the abutting plate (235) and the second locking plate (233) is parallel to the horizontal plane, there is a gap between the abutting plate (235) and the second locking plate (233), a spring (234) is arranged in the gap along the arrangement direction of the abutting plate (235) and the second locking plate (233), and the two ends of the spring (234) are fixedly connected with the abutting plate (235) and the second locking plate (233) respectively. An extension rod (236) is horizontally fixed on the side of the second locking plate (233) facing the abutting plate (235), and the extension rod (236) penetrates the end of the abutting plate (235) and is in sliding fit with the abutting plate (235).

4. A reverse stopping device for preventing the retreat of pipe sections during the construction of a rectangular pipe, according to claim 3, characterized in that, An electric push rod (237) is horizontally arranged on the end of the abutting plate (235) away from the second locking plate (233), the end of the electric push rod (237) is fixedly connected with the end of the abutting plate (235), and the electric push rod (237) drives the abutting plate (235) to move in the horizontal direction. When the electromagnet in the clamping block (21) is powered on, the output end of the electric push rod (237) is in the longest state, and when the electromagnet is powered off, the output end of the electric push rod (237) is completely retracted.

5. A reverse stopping device for preventing the retreat of pipe sections during the construction of a rectangular jacking pipe according to claim 1, characterized in that, A guide rail (238) is fixedly arranged on the support (3) along the extension direction of the pipe joint (1), and the guide rail (238) is in sliding fit with the first locking plate (232) along the extension direction of the pipe joint (1).

6. A reverse stopping device for preventing the retreat of pipe sections during the construction of a rectangular jacking pipe according to claim 1, characterized in that, A push-pull unit (24) is arranged on the end of the clamping block (21) away from the pipe joint (1), the push-pull unit (24) comprises a water tank (241) arranged on the side of the clamping block (21) away from the pipe joint (1), the water tank (241) moves in the vertical direction, a support wheel (243) is rotatably arranged on the support (3) on the upper part of the water tank (241), a connecting belt (242) is arranged between the water tank (241) and the clamping block (21), the two ends of the connecting belt (242) are fixedly connected with the water tank (241) and the clamping block (21) respectively, the connecting belt (242) is wound from the upper part of the support wheel (243) and is in contact with the support wheel (243), and the support wheel (243) is in rolling fit with the connecting belt (242).

7. A reverse stopping device for preventing the retreat of pipe sections during the construction of a rectangular pipe, according to claim 6, characterized in that, A storage tank (244) is arranged on one side of the water tank (241), water is stored in the storage tank (244), a water supply pipe (245) is arranged between the storage tank (244) and the water tank (241), the water tank (241) is in communication with the storage tank (244) through the water supply pipe (245), and a water pump is arranged on the water supply pipe (245), which is used to pump water in the storage tank (244) into the water tank (241) or pump water in the water tank (241) into the storage tank (244).

8. A reverse stopping device for preventing the retreat of pipe sections during the construction of a rectangular jacking pipe according to claim 1, characterized in that, Second rollers (211) are arranged on both sides of the clamping block (21) respectively, the second rollers (211) are in contact with the sidewall of the pipe joint (1) on one side of the clamping groove (11) when the clamping block (21) is in clamping fit with the clamping groove (11), and the axis of the second roller (211) is parallel to the height direction of the support (3).

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