A fixing device for bending pipes in tunnel segment molds.

Abstract

A fixing device for the bend in a tunnel segment mold includes a screw, a sleeve, a valve core, a valve body, a valve stem, a rubber top plate, and a bend clamp. The screw and sleeve are threaded together, and the sleeve is fixedly connected to the valve body. The valve body is connected to a tenon and fixed to the side of the mold. The valve stem is fixed inside the valve body, the valve core is fixed to the head of the valve stem, and a spring is fitted onto the head of the valve stem and connected to the valve core. The rubber top plate and the bend clamp clamp a sealing rubber and fix it to the tail of the valve stem. The other end of the sealing rubber is fixed to the edge of the tenon by a custom-made pressure plate. The rubber top plate is fixedly connected to the bend clamp, and the bend clamp fixes the bend. This device provides stable and reliable fixing, preventing the bend from shifting or falling and causing bolt hole blockage during vibration. It is also convenient, simple, and quick to use; the user can operate it with a wrench. Tightening the screw fixes the bend, and loosening the screw releases the bend. Furthermore, the device has a simple structure, long service life, and is easy to maintain.

Description

Technical fields:

[0001] A fixing device for bending the segment mold of a tunnel boring machine (TBM) is disclosed. This device relates to a mechanical device, particularly for use in the field of subway tunnel boring equipment technology, and belongs to the field of engineering machinery. Background technology:

[0002] Most subway systems in China are constructed using the shield tunneling method. Shield tunnel segments are the main assembly components in shield tunneling. Concrete is poured into molds, and after the concrete hardens, it is removed from the molds to form shield tunnel segments. Because shield tunnel segments need to be connected by bolts, bolt holes must be pre-drilled during concrete pouring. Hollow bends are placed to create these bolt holes during pouring, and the positional accuracy of these bends must be ensured to guarantee the accuracy of the bolt hole positions. Currently, bends are generally fixed using mandrels and small jacks. However, using mandrels and small jacks to fix bends involves many steps, is inefficient, requires many operators, and has high labor costs. Furthermore, the small jacks are prone to falling off during vibration, which can cause bolt hole misalignment. Summary of the Invention:

[0003] The problem this invention aims to solve is to provide a high-efficiency fixing device for the bending pipe of the shield tunnel segment mold that can ensure that the bolt holes do not shift, thus addressing the above-mentioned shortcomings.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] This invention provides a fixing device for the bend in a tunnel segment mold. The device includes a screw, a sleeve, a valve core, a valve body, a valve stem, a rubber top plate, and a bend clamp. The screw and the sleeve are threadedly connected. The sleeve is fixedly connected to the head of the valve body. The tail of the valve body is threadedly connected to a tenon. The valve body is fixed to the side of the mold via the tenon. The valve stem is fixed inside the valve body. The valve core is fixed to the head of the valve stem. A spring is sleeved on the head of the valve stem and connected to the valve core. The rubber top plate and the bend clamp clamp a sealing rubber and fix it to the tail of the valve stem. The other end of the sealing rubber is fixed to the edge of the tenon via a custom-made pressure plate. The rubber top plate is fixedly connected to the bend clamp. The bend clamp fixes the bend.

[0006] The screw is a rotating body with a regular hexagonal head; the screw sleeve and valve body heads are also regular hexagonal.

[0007] The tail of the screw is designed as a stepped shaft with a shoulder.

[0008] The valve stem is a square shaft.

[0009] The valve stem head is threaded, and the valve core is fixed to the valve stem head by a nut.

[0010] The valve body head and the threaded sleeve are connected by screws.

[0011] The rubber top sheet has a square hole with a thickness of half.

[0012] The rubber top plate and the pipe bending clamp are fixed in relative position by a positioning pin, and the pipe bending clamp has an angle hole for adjusting the relative angle.

[0013] The bending pipe clamp head is provided with a raised clamping groove, which corresponds to the clamping groove inside the bending pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention is stable and reliable, and the bent pipe will not shift or fall off during vibration, causing bolt hole blockage.

[0016] 2. This invention uses nitrile rubber seals, and the sealing structure is reasonably designed to avoid grout leakage.

[0017] 3. This invention is convenient, simple and quick to use. Users can operate it with a wrench. When the screw is screwed in, the bent pipe is fixed, and when the screw is screwed out, the bent pipe is released.

[0018] 4. Compared with the prior art, the present invention can reduce the number of workers by 2-4, thereby reducing labor costs.

[0019] 5. The present invention has a simple structure, a long service life, and is easy to maintain. Attached image description:

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the rubber top sheet structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the back structure of the pipe bending clamp of the present invention;

[0024] Figure 5 This is a schematic diagram of the front structure of the pipe bending clamp of the present invention.

[0025] Figure reference numerals:

[0026] 1-Screw, 2-Screw sleeve, 3-Screw, 4-Valve core, 5-Spring, 6-Valve body, 7-Valve stem, 8-Tongue, 9-Custom pressure plate, 10-Sealing rubber, 11-Positioning pin, 12-Rubber top plate, 13-Bend pipe clamp, 14-Bend pipe. 12.1-Square hole, 13.1-Angle hole, 13.2-Raised groove. Detailed implementation method:

[0027] The present invention will be further described below with reference to specific embodiments. These specific embodiments are further explanations of the principles of the present invention and are not intended to limit the present invention in any way. Any technology that is the same as or similar to the present invention does not exceed the scope of protection of the present invention.

[0028] See Figures 1-5 This invention provides a fixing device for bending pipes in tunnel segment molds. Its main components include a screw 1, a screw sleeve 2, a valve core 4, a valve body 6, a valve stem 7, a rubber top plate 12, and a pipe bending clamp 13. The screw 1 is placed inside the screw sleeve 4 and is connected to the screw sleeve 2 via threads. The screw 1 is a rotating body with a regular hexagonal head for easy rotation with a wrench. When the screw 1 rotates, it drives the valve stem 7 to move. The screw sleeve 2 also has a regular hexagonal head. The valve body 6 is connected to the screw sleeve 2 with a screw 3. The valve body 6 also has a regular hexagonal head for easy screwing into the tenon 8 of the mold structure. The tail of the valve body 6 is threaded to the tenon 8, and the valve body 6 is fixed to the side of the mold via the tenon 8. The valve stem 7 is a square shaft fixed inside the valve body 6, so the valve stem 7 can only move axially. The valve stem 7 has threads at its head, and the valve core 4 is fixed to the head of the valve stem 7 by a nut. A spring 5 is fitted onto the head of the valve stem 7 and connected to the valve core 4. The tail of the screw 1 is designed as a stepped shaft with a shoulder. The shoulder of the tail of the screw 1 and the valve core 4 fixed to the head of the valve stem 7 limit the two extreme positions of the fixing device (the extreme position of the screw 1 being screwed out and the extreme position of the screw 1 being screwed in). When the screw 1 is screwed in, the screw 1 drives the valve stem 7 to move through the rigid connection. When the screw 1 is screwed out, the spring 5 drives the valve stem 7 to return to its original position through the valve core 4. The rubber top plate 12 and the bent pipe clamp 13 clamp the sealing rubber 10 and fix it to the tail of the valve stem 7 through the dovetail hole of the mold by the nut. The sealing rubber 10 is made of nitrile rubber. The rubber top plate 12 has a half-thickness square hole 12.1. The size of the square hole 12.1 matches the size of the tail of the valve stem 7. The square hole 12.1 restricts the rotation of the valve stem 7. The other end of the sealing rubber 10 is fixed to the edge of the tenon 8 by a custom pressure plate 9 to achieve a seal. The rubber top plate 12 and the pipe bending clamp 13 are fixed in relative position by a positioning pin 11. The pipe bending clamp 13 has an angle hole 13.1 for adjusting the relative angle. The pipe bending clamp 13 has a raised groove 13.2 that corresponds to the groove inside the pipe bending 14 to fix the pipe bending 14 and prevent the pipe bending 14 from rotating or displacing.

[0029] During operation, the worker uses a wrench to move screw 1, which pushes valve stem 7, which in turn pushes rubber top plate 12, which then presses against bend 14. When the operation is complete, the worker uses a wrench to loosen screw 1, which in turn causes spring 5 to push valve core 4, resetting valve stem 7. Valve stem 7 then resets rubber top plate 12, thereby releasing bend 14.

Claims

1. A fixing device for bending pipes in tunnel segment molds, characterized in that: The fixing device includes a screw (1), a screw sleeve (2), a valve core (4), a valve body (6), a valve stem (7), a rubber top plate (12), and a bent pipe clamp (13). The screw (1) is threadedly connected to the screw sleeve (2), the screw sleeve (2) is fixedly connected to the head of the valve body (6), and the tail of the valve body (6) is threadedly connected to the tenon (8). The valve body (6) is fixed to the side of the mold through the tenon (8). The valve stem (7) is a square shaft, and the valve stem (7) is fixed. Inside the valve body (6), the valve core (4) is fixed to the head of the valve stem (7), and the spring (5) is sleeved on the head of the valve stem (7) and connected to the valve core (4); the rubber top plate (12) has a square hole (12.1) of half thickness, the size of the square hole (12.1) matches the size of the tail of the valve stem (7), the valve stem (7) can only move axially, the tail of the screw (1) is designed as a stepped shaft with a shoulder, and the shoulder of the tail of the screw (1) is connected to the valve stem (7). The valve core (4) with the head fixed restricts the two extreme positions of the fixing device; the rubber top plate (12) and the bend clamp (13) clamp the sealing rubber (10) and fix it to the tail of the valve stem (7), and the other end of the sealing rubber (10) is fixed to the edge of the tenon (8) by a custom pressure plate (9); the rubber top plate (12) and the bend clamp (13) are fixedly connected, and the relative position between the rubber top plate (12) and the bend clamp (13) is fixed by a positioning pin (11), and the bend clamp (13) has an angle hole (13.1) for adjusting the relative angle; the bend clamp (13) fixes the bend (14), and the bend clamp (13) has a raised groove (13.2) that corresponds to the groove inside the bend (14); the screw (1) of the fixing device pushes the valve stem (7), the valve stem (7) pushes the rubber top plate (12), and the rubber top plate (12) abuts against the bend (14).

2. The fixing device for the bend of the shield tunnel segment mold according to claim 1, characterized in that: The screw (1) is a rotating body with a regular hexagonal head; the screw sleeve (2) and valve body (6) both have regular hexagonal heads.

3. The fixing device for bending pipes in shield tunnel segment molds according to claim 1, characterized in that: The valve stem (7) has a threaded head, and the valve core (4) is fixed to the valve stem (7) head by a nut.

4. A fixing device for bending pipes in shield tunnel segment molds according to claim 1, characterized in that: The valve body (6) head is connected to the screw sleeve (2) using a screw (3).

Images