A prefabricated pipe joint rigid connecting piece auxiliary connecting device and a use method thereof

Abstract

The application discloses a prefabricated pipe joint rigid connecting piece auxiliary connecting device and a use method thereof, and relates to the field of prefabricated pipe joint connecting devices.

Description

Technical Field

[0001] This invention relates to the field of underground utility tunnel construction technology, and in particular to an auxiliary connection device for rigid prefabricated pipe sections and its usage method. Background Technology

[0002] With the improvement of urban development levels, the construction of intensive cities has become the mainstream of urban development. As an important infrastructure for intensive pipeline management, integrated utility tunnels are increasingly being used in pipeline management in various cities. Cast-in-place construction, as a conventional method for integrated utility tunnel construction, contradicts the needs of urban industrialized construction, easily causing environmental pollution, resource waste, high manpower requirements, and high labor intensity.

[0003] Currently, the construction methods for utility tunnels include: open-cut cast-in-place method, open-cut prefabrication method, shallow buried tunneling method, and shield tunneling method. Among these, the open-cut prefabrication method involves first prefabricating the utility tunnel in sections, then transporting the prefabricated sections to the construction site for assembly. When the prefabricated sections are assembled, they need to be connected to each other using prestressed steel bars (as in patents with publication numbers CN202110277277.9 and CN201711397679.2). When connecting the prestressed steel bars to the sections, they must pass through the connecting groove of one prefabricated section's end through a connecting through-hole, then into the connecting through-hole of the adjacent prefabricated section (entering the connecting groove for the first time), and then into the connecting groove of the adjacent prefabricated section until both ends of the prestressed steel bar are located in the connecting grooves of the two prefabricated sections. At this point, washers and nuts are installed at both ends of the prestressed steel bar to complete the fixing.

[0004] In the aforementioned process, when the prestressed steel bar first enters the connecting groove, because the diameter of the connecting through hole is larger than the prestressed steel bar and the front end of the prestressed steel bar is suspended, the prestressed steel bar often cannot be aligned with the connecting through hole at the rear end of the first precast pipe section. At this time, it is necessary to manually straighten it, which often requires two people to work together. Moreover, during the straightening process, it is very easy for the end of the prestressed steel bar to squeeze and injure people's hands, which poses a great safety hazard. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an auxiliary connection device for rigid precast pipe sections and its usage method. The connection of prestressed steel bars is straightened by guide sliding blocks, which can avoid misalignment of the prestressed steel bars when they enter the connection through holes from the connection groove. Moreover, this process does not require manual straightening, thus solving the safety hazard of prestressed steel bars injuring people.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] An auxiliary connection device for a rigid connector of a precast pipe section includes a fixing part and a guide sliding block. The fixing part is adapted to the length of the connection groove of the precast pipe section and can be detachably fixed in the connection groove of the precast pipe section.

[0008] The top of the guide sliding block is slidably connected to the bottom of the fixing part. The guide sliding block has a guide hole in the middle that is coaxial with the connecting through hole of the precast pipe section and has the same diameter. A prestressed thin baffle is provided in the middle of the guide hole.

[0009] Furthermore, the prestressed thin baffle includes an upper baffle and a lower baffle, with a gap between the upper baffle and the lower baffle.

[0010] Furthermore, the prestressed thin sheet is a plastic sheet.

[0011] Furthermore, the left and right walls of the connecting groove of the prefabricated pipe section are respectively provided with reserved holes;

[0012] The fixing part is provided with insertion slots at both ends, and a telescopic rod is provided in the insertion slot. The telescopic rod is adapted to the reserved hole, and the fixing part is fixed to the connecting slot through the reserved hole, the telescopic rod and the connecting slot.

[0013] Furthermore, the bottom of the fixing part is provided with a sliding groove, and the bottom of the guide sliding block is provided with a slider adapted to the sliding groove. The guide sliding block is slidably connected to the fixing part through the slider and the sliding groove.

[0014] Furthermore, the groove is a T-shaped groove or a dovetail groove.

[0015] Furthermore, the prestressed thin baffle is made of steel plate.

[0016] Furthermore, the inner wall of the guide sliding block is provided with an upper clearance groove and a lower clearance groove. The upper baffle is rotatably connected to the upper clearance groove through a first fixed shaft, and the lower baffle is rotatably connected to the lower clearance groove through a second fixed shaft. Torsion springs are sleeved on the outside of the first fixed shaft and the second fixed shaft.

[0017] A method for using an auxiliary connection device based on a prefabricated pipe section rigid connector includes the following steps:

[0018] S1. Install the fixing part and guide sliding block: Fix the fixing part in the connecting groove of the first precast pipe section. After the fixing part is in place, slide the guide sliding block to make it fit tightly against the groove wall away from the second precast pipe section.

[0019] S2. Inserting prestressed steel bars: Insert the prestressed steel bars into the connecting through hole at the front end of the first precast pipe section, and apply N1 driving force to the prestressed steel bars to move them toward the connecting groove.

[0020] S3, Prestressed steel bar guidance: (1) The end of the prestressed steel bar passes through the connecting through hole at the front end and enters the guide hole of the guide sliding block. When the end of the prestressed steel bar contacts the prestressed thin baffle, the prestressed steel bar drives the guide sliding block to move synchronously towards the second precast pipe section; (2) When the guide sliding block moves to contact the groove wall near the end of the connecting groove close to the second precast pipe section, N2 driving force is applied to the prestressed steel bar, so that the end of the prestressed steel bar is released from the limitation of the prestressed thin baffle and enters the connecting through hole at the rear end of the first precast pipe section; where N2>N1;

[0021] S4. Fixing the prestressed steel bars: When the end of the prestressed steel bar enters the connecting groove of the second precast pipe section, the prestressed steel bar is in place. After the prestressed steel bar is in place, manually slide the guide sliding block towards the connecting through hole at the front end of the first precast pipe section to make the guide sliding block disengage from the prestressed steel bar. After retracting the fixing part and the guide sliding block, install the pads and nuts at both ends of the prestressed steel bar respectively.

[0022] The beneficial effects of this invention are:

[0023] (1) The connection of the prestressed steel bars in this invention is straightened by the guide sliding block, which can avoid the misalignment of the prestressed steel bars when they enter the connection through hole from the connection groove. Moreover, the process does not require manual straightening, thus solving the safety hazard of prestressed steel bars injuring people.

[0024] (2) The prestressed thin baffle is connected to the guide sliding block through the fixed shaft and the relief groove, so that the prestressed thin baffle can be used repeatedly. Attached Figure Description

[0025] Figure 1 This is a front view of a prefabricated pipe section in an embodiment of the present invention;

[0026] Figure 2 This is a cross-sectional view of two prefabricated pipe sections connected in an embodiment of the present invention;

[0027] Figure 3 This is a sectional view of a prefabricated pipe section;

[0028] Figure 4 for Figure 3 Enlarged view of point A in the middle section;

[0029] Figure 5 This is a schematic diagram showing the prestressed steel bar entering the front-end connection through hole a;

[0030] Figure 6 This is a schematic diagram showing the end of the prestressed steel bar entering the guide sliding block.

[0031] Figure 7 This is a schematic diagram showing the movement of the guide sliding block driven by the prestressed steel bars.

[0032] Figure 8 This is a schematic diagram showing the prestressed steel bar driving the guide sliding block to contact the left end of the connecting groove.

[0033] Figure 9 A schematic diagram showing the process of releasing the prestressed steel bar from the prestressed thin baffle and allowing it to enter the rear connecting through hole a;

[0034] Figure 10 A schematic diagram showing the separation of the guide sliding block from the prestressed steel bar to ensure it is in place.

[0035] Figure 11 This is a schematic diagram of the structure of the guide sliding block in Embodiment 2 of the present invention;

[0036] Figure 12 This is a diagram showing the usage state of the guide sliding block in Embodiment 2 of the present invention;

[0037] In the figure, 1 is the fixing part; 2 is the guide sliding block; 3 is the precast pipe section; 4 is the connecting groove; 5 is the connecting through hole; 6 is the guide hole; 7 is the prestressed thin baffle; 8 is the upper baffle; 9 is the lower baffle; 10 is the plug groove; 11 is the telescopic rod; 12 is the upper clearance groove; 13 is the first fixed shaft; and 14 is the prestressed steel bar. Detailed Implementation

[0038] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] See Figures 1-12 The present invention provides a technical solution:

[0040] Example 1:

[0041] like Figures 1-12 As shown, an auxiliary connection device for a rigid connector of a precast pipe section includes a fixing part 1 and a guide sliding block 2. The fixing part 1 is adapted to the length dimension of the connecting groove 4 of the precast pipe section 3, and the fixing part 1 is detachably fixed in the connecting groove 4 of the precast pipe section 3.

[0042] The top of the guide sliding block 2 is slidably connected to the bottom of the fixing part 1. The guide sliding block 2 has a guide hole 6 in the middle that is coaxial with the connecting through hole 5 of the precast pipe section 3 and has the same diameter. A prestressed thin baffle 7 is provided in the middle of the guide hole 6.

[0043] The prestressed thin baffle 7 includes an upper baffle 8 and a lower baffle 9, with a gap between the upper baffle 8 and the lower baffle 9.

[0044] The prestressed thin baffle 7 is a plastic sheet.

[0045] The prefabricated pipe section 3 has reserved holes on the left and right walls of the connecting groove 4;

[0046] The fixing part 1 is provided with insertion slots 10 at both ends, and a telescopic rod 11 is provided in the insertion slot 10. The telescopic rod 11 is adapted to the reserved hole, and the fixing part 1 is fixed to the connecting slot 4 through the reserved hole and the telescopic rod 11.

[0047] The bottom of the fixing part 1 is provided with a sliding groove, and the bottom of the guide sliding block 2 is provided with a slider that is adapted to the sliding groove. The guide sliding block 2 is slidably connected to the fixing part 1 through the slider and the sliding groove.

[0048] The groove is a T-shaped groove or a dovetail groove.

[0049] For ease of description, the first precast pipe section 3 is referred to as precast pipe section a, and the second precast pipe section 3 is referred to as precast pipe section b. The connecting through hole 5 at the front end of the first precast pipe section 3 is referred to as front connecting through hole a, and the connecting through hole 5 at the rear end of the first precast pipe section 3 is referred to as rear connecting through hole a; the connecting groove 4 of the first precast pipe section 3 is referred to as connecting groove a. The connecting through hole 5 at the front end of the second precast pipe section 3 is referred to as front connecting through hole b, and the connecting groove 4 of the second precast pipe section 3 is referred to as connecting groove b.

[0050] Working principle: (1) Fix the fixing part 1 to the connecting groove a, and make the guide sliding block 2 close to the right groove wall of the connecting groove a.

[0051] (2) Insert the prestressed steel bar 14 into the front end connecting through hole a, and apply a driving force N1 to make the prestressed steel bar 14 move toward the precast pipe section b. The driving force N1 is not large enough to damage the prestressed thin baffle 7.

[0052] (3) When the end of the prestressed steel bar 14 passes through the front end connecting through hole a, it enters the guide hole 6 of the guide sliding block 2. At this time, the end of the prestressed steel bar 14 is supported by the guide sliding block 2 (to prevent the end of the prestressed steel bar 14 from being suspended). When the end of the prestressed steel bar 14 contacts the prestressed thin baffle 7, the prestressed steel bar 14 drives the guide sliding block 2 to move synchronously toward the precast pipe section b.

[0053] (4) When the guide sliding block 2 moves to contact the left groove wall of the connecting groove a, a driving force N2 greater than N1 is applied to the prestressed steel bar 14. The driving force N2 destroys the prestressed thin baffle 7 and releases the prestressed thin baffle 7 from limiting the prestressed steel bar 14. At this time, the prestressed steel bar 14 enters the rear connecting through hole a and moves toward the connecting groove b.

[0054] (5) When the end of the prestressed steel bar 14 moves to enter the connecting groove b through the front connecting through hole b, the prestressed steel bar 14 is in place; manually move the guide sliding block 2 toward the front connecting through hole a, so that the guide sliding block 2 is disengaged from the prestressed steel bar 14. Then remove the fixing part 1, and install the pad and nut onto the prestressed steel bar 14 respectively to complete the connection of the prestressed steel bar 14.

[0055] The connection of the prestressed steel bar 14 in this invention is straightened by the guide sliding block 2, which can prevent the prestressed steel bar 14 from being misaligned when it enters the connecting through hole 5 from the connecting groove 4. Moreover, this process does not require manual straightening, thus solving the safety hazard of the prestressed steel bar 14 injuring people.

[0056] Example 2:

[0057] The difference between this embodiment and Embodiment 1 is that, as Figures 5-8 , Figures 10-12 As shown, the prestressed thin baffle 7 is a steel plate.

[0058] Furthermore, the inner wall of the guide sliding block 2 is provided with an upper relief groove 12 and a lower relief groove. The upper baffle 8 is rotatably connected to the upper relief groove 12 through a first fixed shaft 13, and the lower baffle 9 is rotatably connected to the lower relief groove through a second fixed shaft. Torsion springs are sleeved on the outside of the first fixed shaft 13 and the second fixed shaft.

[0059] The upper baffle 8 is fixed to the first fixed shaft 13, the first fixed shaft 13 is rotatably connected to the upper relief groove 12, and the two ends of the torsion spring are fixedly connected to the groove wall of the first fixed shaft 13 and the upper relief groove 12 respectively; the lower baffle 9 is connected in the same way as the upper baffle.

[0060] The installation process of the prestressed steel bar 14 in this embodiment is the same as in Embodiment 1, except that when the guide sliding block 2 moves to contact the left groove wall of the connecting groove a, a driving force N2 greater than N1 is applied to the prestressed steel bar 14. When the prestressed steel bar 14 acts on the prestressed thin baffle 7 with a force of N2, the prestressed thin baffle 7 moves towards the upper / lower clearance groove, thereby allowing the prestressed steel bar 14 to pass through, thus releasing the restriction of the prestressed steel bar 14 by the prestressed thin baffle 7. At this time, the prestressed steel bar 14 enters the rear connecting through hole a and moves towards the connecting groove b.

[0061] The prestressed thin baffle 7 is connected to the guide sliding block 2 through a fixed shaft and a relief groove, which allows the prestressed thin baffle 7 to be used repeatedly.

[0062] Example 3:

[0063] This embodiment describes a method for using the auxiliary connection device for the rigid connector of the prefabricated pipe section 3 in Embodiment 1, including the following steps:

[0064] S1. Install the fixing part 1 and the guide sliding block 2: Fix the fixing part 1 in the connecting groove 4 of the first precast pipe section 3. After the fixing part 1 is in place, slide the guide sliding block 2 to make it fit tightly against the groove wall of the connecting groove 4 away from the second precast pipe section 3.

[0065] S2. Inserting prestressed steel bar 14: Insert the prestressed steel bar 14 into the connecting through hole 5 at the front end of the first precast pipe section 3, and apply N1 driving force to the prestressed steel bar 14 to move the prestressed steel bar 14 toward the connecting groove 4.

[0066] S3, Prestressed steel bar 14 guidance: (1) The end of the prestressed steel bar 14 passes through the connecting through hole 5 at the front end and enters the guide hole 6 of the guide sliding block 2. When the end of the prestressed steel bar 14 contacts the prestressed thin baffle 7, the prestressed steel bar 14 drives the guide sliding block 2 to move synchronously towards the second precast pipe section 3; (2) When the guide sliding block 2 moves to contact the groove wall of the connecting groove 4 near the end of the second precast pipe section 3, N2 driving force is applied to the prestressed steel bar 14, so that the end of the prestressed steel bar 14 pushes open the prestressed thin baffle 7, so as to release the restriction of the prestressed thin baffle 7 and enter the connecting through hole 5 at the rear end of the first precast pipe section 3; where N2>N1; where in this embodiment, pushing open the prestressed thin baffle 7 means destroying the prestressed thin baffle 7.

[0067] S4. Fixing the prestressed steel bar 14: When the end of the prestressed steel bar 14 enters the connecting groove 4 of the second precast pipe section 3, the prestressed steel bar 14 is in place. After the prestressed steel bar 14 is in place, manually slide the guide sliding block 2 towards the connecting through hole 5 at the front end of the first precast pipe section 3 to make the guide sliding block 2 disengage from the prestressed steel bar 14. After retracting the fixing part 1 and the guide sliding block 2, install the pad and nut at both ends of the prestressed steel bar 14 respectively.

[0068] Example 4:

[0069] This embodiment describes a method for using the auxiliary connection device for the rigid connector of the prefabricated pipe section 3 in Embodiment 2, including the following steps:

[0070] S1. Install the fixing part 1 and the guide sliding block 2: Fix the fixing part 1 in the connecting groove 4 of the first precast pipe section 3. After the fixing part 1 is in place, slide the guide sliding block 2 to make it fit tightly against the groove wall of the connecting groove 4 away from the second precast pipe section 3.

[0071] S2. Inserting prestressed steel bar 14: Insert the prestressed steel bar 14 into the connecting through hole 5 at the front end of the first precast pipe section 3, and apply N1 driving force to the prestressed steel bar 14 to move the prestressed steel bar 14 toward the connecting groove 4.

[0072] S3, Prestressed steel bar 14 guidance: (1) The end of the prestressed steel bar 14 passes through the connecting through hole 5 at the front end and enters the guide hole 6 of the guide sliding block 2. When the end of the prestressed steel bar 14 contacts the prestressed thin baffle 7, the prestressed steel bar 14 drives the guide sliding block 2 to move synchronously towards the second precast pipe section 3; (2) When the guide sliding block 2 moves to contact the groove wall of the connecting groove 4 near the end of the second precast pipe section 3, it applies N2 driving force to the prestressed steel bar 14, so that the end of the prestressed steel bar 14 pushes open the prestressed thin baffle 7, releases the limitation of the prestressed thin baffle 7 and enters the connecting through hole 5 at the rear end of the first precast pipe section 3; where N2>N1; in this embodiment, pushing open the prestressed thin baffle 7 means: when the prestressed steel bar 14 acts on the prestressed thin baffle 7 with a force of N2, the prestressed thin baffle 7 moves towards the upper / lower clearance groove, thereby making clearance so that the prestressed steel bar 14 can pass through. When the prestressed steel bar 14 separates from the guide sliding block 2, the prestressed thin baffle 7 is reset so that it can be used again next time, thus realizing the repeated use of the prestressed thin baffle 7.

[0073] S4. Fixing the prestressed steel bar 14: When the end of the prestressed steel bar 14 enters the connecting groove 4 of the second precast pipe section 3, the prestressed steel bar 14 is in place. After the prestressed steel bar 14 is in place, manually slide the guide sliding block 2 towards the connecting through hole 5 at the front end of the first precast pipe section 3 to make the guide sliding block 2 disengage from the prestressed steel bar 14. After retracting the fixing part 1 and the guide sliding block 2, install the pad and nut at both ends of the prestressed steel bar 14 respectively.

[0074] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A precast pipe joint rigid connector auxiliary connection device, characterized by: The fixed part is detachably fixed in the connecting groove of the prefabricated pipe section. The top of the guide sliding block is slidably connected with the bottom of the fixed part. The prestressed thin baffle includes an upper baffle and a lower baffle. The inner wall of the guide sliding block is provided with an upper displacement slot and a lower displacement slot.

2. The device according to claim 1, characterized in that: The prestressed thin baffle is a plastic sheet.

3. The device according to claim 2, characterized in that it comprises: The left and right groove walls of the connecting groove of the prefabricated pipe section are respectively provided with reserved holes. The fixed part is fixed in the connecting groove through the reserved holes and the telescopic rods.

4. The device according to claim 3, characterized in that: The bottom of the fixed part is provided with a sliding groove, and the top of the guide sliding block is provided with a sliding block matched with the sliding groove.

5. The device according to claim 4, characterized in that it comprises: The sliding groove is a T-shaped groove or a dovetail groove.

6. The device according to claim 1, wherein: The prestressed thin baffle is a steel plate.

7. A method of using the auxiliary connecting device for the rigid connection of the prefabricated pipe section according to any one of claims 1-6, characterized in that: The method comprises the following steps: S1, installing the fixed part and the guide sliding block: fixing the fixed part in the connecting groove of the first prefabricated pipe section, and sliding the guide sliding block after the fixed part is in place so that the guide sliding block is close to the groove wall away from the end of the second prefabricated pipe section; S2, inserting the prestressed steel bar: inserting the prestressed steel bar into the connecting through hole at the front end of the first prefabricated pipe section, and applying N1 driving force to the prestressed steel bar to make the prestressed steel bar move towards the connecting groove; S3, prestressed steel bar guiding: (1) the end of the prestressed steel bar is inserted into the guide hole of the guide sliding block from the connecting through hole at the front end, and when the end of the prestressed steel bar contacts the prestressed thin baffle, the prestressed steel bar drives the guide sliding block to move towards the second prefabricated pipe section; (2) when the guide sliding block moves to contact the groove wall close to the end of the second prefabricated pipe section, N2 driving force is applied to the prestressed steel bar to make the end of the prestressed steel bar disengage the prestressed thin baffle and enter the connecting through hole at the rear end of the first prefabricated pipe section; wherein N2>N1; S4, prestressed steel bar fixing: when the end of the prestressed steel bar enters the connecting groove of the second prefabricated pipe section, the prestressed steel bar is in place, and after the prestressed steel bar is in place, the guide sliding block is manually slid towards the connecting through hole at the front end of the first prefabricated pipe section to make the guide sliding block disengage the prestressed steel bar; after the fixed part and the guide sliding block are withdrawn, a pad and a nut are respectively installed at the two ends of the prestressed steel bar.

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