Segment waterproofing test bench screw tightening machine

Abstract

The invention relates to a screw tightening machine for a pipe segment anti-seepage test bench, which comprises a frame. A hanging hole is provided on the upper side of the frame for a crane to hang the frame horizontally above the pipe segment. A nut screwing mechanism is fixed to the lower side of the frame. There are two nut screwing mechanisms, which are arranged side by side and spaced apart along the extension direction of the frame. The nut screwing mechanism comprises a screwing head extending downward, and the two screwing heads are respectively used to be sleeved on nuts at both ends of the same fastening cross bar. The nut screwing mechanism also has a driving motor, which is transmission-connected to a driving shaft. The screwing head is in rotation-stopping cooperation with the driving shaft. The nut screwing mechanism also comprises a controller connected to the driving motor to control the forward and reverse rotation of the driving motor. The operation is relatively simple, the structure is exquisite, and the use is convenient.

Description

Technical Field

[0001] The invention relates to a screw tightening machine for a pipe segment anti-seepage test bench. Background Art

[0002] After the segment is manufactured, a fixed number of segments need to be drawn for a series of tests to ensure the segment is qualified, including grouting hole pull-out test, segment bending test, segment impermeability test, etc. For the segment impermeability test, such as Figure 1 As shown, this test is mainly to check whether the anti-seepage capacity of the segment concrete meets the design requirements, so as to provide a basis for the durability of the segment.

[0003] The main test tools for segment anti-seepage test are as follows: Figure 1 As shown, it includes a leak detection frame, a fastening cross bar 12, a double-headed screw 13 and a nut 16, wherein the leak detection frame includes an arc-shaped steel plate 14 whose shape is consistent with the pipe segment, and rubber pads 15 are installed around the arc surface of the arc-shaped steel plate 14. The pipe segment 11 is placed on the leak detection frame, and its outer arc surface is tightly attached to the inner arc surface of the arc-shaped steel plate 14 through a sealing rubber pad to form a sealed space. A total of 15 fastening cross bars 12 are placed in the middle and on both sides of the inner arc surface of the pipe segment 11 in the longitudinal direction, and 15 fastening cross bars 12 are arranged at corresponding positions on the outer arc surface of the pipe segment 11. Both ends of each fastening cross bar 12 are provided with a through hole, and the double-headed screw 13 is installed in the corresponding fastening cross bars 12 on the inner and outer arc surfaces of the pipe segment along the thickness direction of the pipe segment, and the two ends are screwed to the double-headed screw 13 with nuts 16, and the nuts 16 are tightened, at this time, a sealed space is formed between the outer arc surface of the pipe segment and the inner arc surface of the arc steel plate 14. The leak detection rack is provided with a water inlet for communicating with the sealed space, and external pressurized water is introduced into the sealed space to achieve steady pressurization and constant pressure support of the pipe segment. During the pressurization process, it is detected whether there are leaks on the outer surface of the pipe segment, and the depth of water penetration is detected, so as to obtain the performance of the pipe segment anti-seepage test.

[0004] In the above test process, the structural arrangement of the fastening cross bar 12 and the double-headed screw 13, and the overall weight and size of the pipe segment are relatively large. When fastening the pipe segment to the arc-shaped steel plate 14, there are a total of thirty double-headed screws 13, and two nuts 16 need to be screwed on each of them. In order to ensure the airtightness of the sealed space, a large pre-tightening force needs to be applied to the nuts 16. In the prior art, four workers usually screw the four associated screws on the same fastening cross bar 12 at the same time, and in order to ensure a large pre-tightening force, a special lever-like structure needs to be used to screw the nuts 16. During the screwing process, multiple people are required to tighten the nuts 16 on a cross bar, and the operation is basically the same when the nuts are loosened. This type of operation takes a long time to screw, and it usually takes one day to complete the screwing and loosening of all the nuts 16, which is a great waste of manpower and has low test efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a screw tightening machine for a pipe segment anti-seepage test bench to solve the problem in the prior art that when a double-headed screw is fixed on a fastening cross bar, screwing and loosening the nut is time-consuming and labor-intensive, and the test efficiency is low.

[0006] In order to solve the above problems, the screw tightening machine for the pipe segment anti-seepage test bench involved in the present invention adopts the following technical solutions:

[0007] The screw tightening machine of the pipe segment anti-seepage test bench includes a frame, and the upper side of the frame is provided with a hanging hole for a crane to hang the frame horizontally above the pipe segment. A nut screwing mechanism is fixed to the lower side of the frame. There are two nut screwing mechanisms, which are arranged side by side and spaced along the extension direction of the frame. The nut screwing mechanism includes a screwing head extending downward, and the two screwing heads are respectively used to be sleeved on nuts at both ends of the same fastening cross bar. The nut screwing mechanism also has a driving motor, which is transmission-connected to a driving shaft, and the screwing head is engaged with the driving shaft to prevent rotation. The nut screwing mechanism also includes a controller controlled by the driving motor to control the forward and reverse rotation of the driving motor.

[0008] Furthermore, the driving motor is placed horizontally on the lower side of the frame, and a bevel gear reducer is connected between the driving motor and the driving shaft.

[0009] Furthermore, the screwing head is detachably connected to the driving shaft.

[0010] Furthermore, the screwing head is plug-connected with the driving shaft to prevent rotation.

[0011] Furthermore, the frame is a flat plate structure, and support rods for supporting the frame on the ground are provided at both ends of the lower side of the frame, and the distance from the bottom end of the support rod to the frame is greater than the distance from the bottom end of the drive shaft to the frame.

[0012] Furthermore, the frame is provided with an adjustment long hole for fixing the drive motor, the adjustment long hole extends along the spacing direction of the two screwing heads, and the drive motor is provided with a welding screw for fixing the drive motor in the adjustment long hole through a locking nut.

[0013] The beneficial effects of the present invention are as follows: Compared with the prior art, the screw tightening machine of the pipe segment anti-seepage test bench involved in the present invention, through the setting of the frame, bolt tightening mechanism, screwing head, driving motor and driving shaft, in the actual working process, the worker first screws each bolt to the double-headed screw at the two ends of the corresponding fastening cross bar, and then hoist the frame to the top of the pipe segment by the crane, and the worker adjusts the direction of the frame to the position horizontally placed above the pipe segment, so that the spacing direction of the two screwing heads of the two nut screwing mechanisms is consistent with the extension direction of the fastening cross bar, and the spacing distance of the two screwing heads is consistent with the distance between the two nuts on the same fastening cross bar, and then the crane descends, and the two screwing heads are respectively set on the two nuts on the fastening cross bar, and then the controller controls the driving motor to work, so that the two screwing heads rotate, and then the nuts are tightened. The screw tightening machine uses the driving form of the driving motor to screw the nuts, and the size of its screwing force can be changed by selecting different motors. When loosening, the driving motor can be controlled to reverse by the controller. The screw tightening machine can tighten and loosen two nuts on the same fastening crossbar at the same time, with almost no manual labor, simple operation, delicate structure and convenient use. According to the test, the bolts on a pipe segment can be tightened or loosened successfully in 18 minutes, which greatly improves the efficiency of the anti-seepage test. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the following briefly introduces the drawings required for use in the embodiment:

[0015] Figure 1 It is a structural diagram of a pipe segment anti-seepage test in the prior art;

[0016] Figure 2 It is a structural schematic diagram of a specific embodiment of a screw tightening machine for a pipe segment anti-seepage test bench of the present invention;

[0017] Figure 3 for Figure 2 Top view of the mid-rack.

[0018] Explanation of the reference numerals: 1-frame; 2-lifting ring; 3-nut screwing mechanism; 4-driving motor; 5-screwing head; 6-driving shaft; 7-bevel gear reducer; 8-controller; 9-support rod; 10-adjusting long hole; 11-pipe segment; 12-fastening cross bar; 13-double-headed screw; 14-arc steel plate; 15-rubber pad; 16-nut. DETAILED DESCRIPTION

[0019] In order to make the technical purpose, technical solution and beneficial effects of the present invention more clear, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] The specific embodiment of the screw tightening machine for the pipe segment anti-seepage test bench involved in the present invention is as follows: Figure 2-3 As shown, the segment anti-permeability test bench screwing machine is used to synchronously screw the nuts 16 at both ends of the same fastening crossbar 12. It includes a frame 1. In this embodiment, the frame 1 is a rectangular flat plate structure, which is formed by welding steel plates and steel pipes, etc., so that the overall structure of the frame 1 is relatively light and easy to process. The frame 1 is the basic carrier of other parts. In other embodiments, its specific structure is not limited, and those skilled in the art can design it arbitrarily according to actual needs.

[0021] A lifting ring 2 for a crane to lift the frame 1 horizontally above the pipe segment 11 is provided on the upper side plate of the frame 1. The inner hole of the lifting ring 2 constitutes a lifting hole. In the present embodiment, in order to ensure the stability and horizontality of the lifting, there are two lifting rings 2, which are arranged above the frame 1 at intervals along the length extension direction of the frame 1 to achieve two-point stable lifting of the frame 1. Of course, in other embodiments, the number of the lifting rings 2 is not limited, and the lifting holes can also be directly opened on the frame 1.

[0022] A nut screwing mechanism 3 is fixed on the lower side plate of the frame 1. There are two nut screwing mechanisms 3, which are arranged side by side and spaced along the length extension direction of the frame 1. As for the nut screwing mechanism 3, it includes a driving motor 4 fixed on the frame 1, a driving shaft 6 connected to the driving motor 4, a screwing head 5 that is locked with the driving shaft 6, and a controller 8 that is connected to the driving motor 4 to control the forward and reverse rotation of the driving motor 4. As for the screwing head 5, the screwing head 5 extends downward, and the two screwing heads 5 on the two nut screwing mechanisms 3 are respectively used to be sleeved on the nuts 16 at both ends of the same fastening cross bar 12. As for the driving shaft 6, it is driven with the driving motor 4 and locked with the screwing head 5, so that the driving force of the driving motor 4 can be transmitted to the screwing head 5. As for the driving motor 4, its specific structure and working principle are consistent with the motor AC motor in the prior art, and will not be described in detail. Those skilled in the art can design it arbitrarily according to actual needs. In the actual working process, the corresponding driving motor 4 can be selected according to the force required to tighten the nut 16. For the controller 8, the control principle of the controller 8 controlling the forward and reverse rotation of the drive motor 4 is consistent with the existing control, and will not be described in detail. In this embodiment, the controller 8 is connected to the drive motor 4 by wires for easy control. In other embodiments, the controller 8 can control the drive motor 4 by Bluetooth or other wireless methods.

[0023] In addition, the drive motor 4 is placed horizontally on the lower side of the frame 1, and a bevel gear reducer 7 is connected between the drive motor 4 and the drive shaft 6. Specifically, the output ends of the two drive motors 4 are arranged opposite to each other, and the output shafts of the drive motors 4 are connected to the bevel gear reducer 7, and the output shafts of the bevel gear reducer 7 constitute the drive shaft 6. This arrangement is mainly to save space under the frame 1 and ensure a certain structural compactness. Moreover, when the drive motor 4 is placed horizontally, the overall size is elongated, ensuring that the force on the frame 1 is balanced. In other embodiments, the drive motor 4 can also be vertically suspended on the lower side of the frame 1, and when the frame 1 is of other structures, it can also be fixed on one side of the frame 1, without specific limitation.

[0024] Furthermore, in this embodiment, the screwing head 5 is detachably connected to the drive shaft 6. Preferably, the screwing head 5 and the drive shaft 6 are plugged and locked. Specifically, as shown in the figure, the lower end of the screwing head 5 has an inner hexagonal hole for sleeved on the nut 16, and the upper end is provided with an inner square hole, and the lower end of the corresponding drive shaft 6 is provided with an outer square. The screwing head 5 and the drive shaft 6 are plugged and locked to achieve locking assembly and convenient disassembly. This arrangement is mainly to correspond to nuts 16 of different sizes and to facilitate the replacement of screwing heads 5 of different sizes. Of course, in other embodiments, the screwing head 5 and the drive shaft 6 can be relatively fixed by flange connection or other connection forms; the screwing head 5 can also be an integrated structure with the drive shaft 6.

[0025] In addition, support rods 9 for supporting the frame 1 on the ground are provided at both ends of the lower side of the frame 1, and the distance between the bottom end of the support rod 9 and the frame 1 is greater than the distance between the bottom end of the drive shaft 6 and the frame 1. Correspondingly, a support rod 9 is also provided at the center of the frame 1. The support rod 9 is provided mainly to facilitate the storage of the screwdriver and to prevent certain damage to the drive shaft 6, the drive motor 4, etc. Of course, in other embodiments, the support rod 9 may not be provided.

[0026] Furthermore, it should be noted that: the frame 1 is provided with an adjustment slot 10 for fixing the drive motor 4, the adjustment slot 10 extends along the spacing direction of the two screwing heads 5, and the drive motor 4 is provided with a welding screw for fixing the drive motor 4 in the adjustment slot 10 through a locking nut 16. This is because the sizes of the pipe segments 11 are different, the lengths of the fastening cross bars 12 are different, and the corresponding nuts 16 have different spacings. Therefore, the design of the adjustment slot 10 is mainly to be able to adjust the relative positions of the two drive motors 4 before the test, and then adjust the spacing between the two screwing heads 5 to adapt to nuts 16 with different spacings.

[0027] In the actual use of the screw tightening machine, the worker first screws each bolt onto the double-headed screw 13 at the two ends of the corresponding fastening cross bar 12, and then hoists the frame 1 to the top of the pipe segment 11 by the crane. The worker adjusts the direction of the frame 1 to a position horizontally placed above the pipe segment 11, so that the spacing direction of the two screwing heads 5 of the two nut screwing mechanisms 3 is consistent with the extension direction of the fastening cross bar 12, and the spacing distance of the two screwing heads 5 is consistent with the distance between the two nuts 16 on the same fastening cross bar 12, and then the crane descends, and the two screwing heads 5 are respectively mounted on the two nuts 16 on the fastening cross bar 12, and then the controller 8 controls the drive motor 4 to work, so that the two screwing heads 5 rotate, and then the nuts 16 are tightened. The screw tightening machine uses the drive motor 4 to drive the nuts 16, and the size of its screwing force can be changed by selecting different motors. When loosening, the drive motor 4 can be controlled to reverse by the controller 8.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate but not limit the technical solutions of the present invention, and any equivalent substitutions of the present invention and any modifications or partial substitutions that do not depart from the spirit and scope of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. The screw tightening machine for the pipe segment anti-seepage test bench is characterized by: The invention comprises a frame, wherein the upper side of the frame is provided with a hanging hole for a crane to hang the frame horizontally above the pipe segment, and the lower side of the frame is fixed with a nut screwing mechanism, wherein there are two nut screwing mechanisms which are arranged side by side and spaced apart along the extension direction of the frame, and the nut screwing mechanism comprises a screwing head extending downward, and the two screwing heads are respectively used to be sleeved on nuts at both ends of the same fastening cross bar, and the nut screwing mechanism also comprises a driving motor, which is transmission-connected with a driving shaft, and the screwing head is engaged with the driving shaft to prevent rotation, and the nut screwing mechanism also comprises a controller which is control-connected with the driving motor to control the forward and reverse rotation of the driving motor.

2. The screw tightening machine for the pipe segment anti-seepage test bench according to claim 1 is characterized in that: The driving motor is horizontally arranged at the lower side of the frame, and a bevel gear reducer is connected between the driving motor and the driving shaft.

3. The screw tightening machine for the pipe segment anti-seepage test bench according to claim 2 is characterized in that: The screwing head is detachably connected to the driving shaft.

4. The screw tightening machine for the pipe segment anti-seepage test bench according to claim 3 is characterized in that: The screwing head is plug-connected and rotationally locked with the driving shaft.

5. The screw tightening machine for the pipe segment anti-seepage test bench according to claim 3 is characterized in that: The frame is a flat plate structure, and support rods for supporting the frame on the ground are provided at both ends of the lower side of the frame, and the distance from the bottom end of the support rod to the frame is greater than the distance from the bottom end of the drive shaft to the frame.

6. The screw tightening machine for the pipe segment anti-seepage test bench according to any one of claims 1 to 5, characterized in that: The frame is provided with an adjusting long hole for fixing the driving motor, the adjusting long hole extends along the spacing direction of the two screwing heads, and the driving motor is provided with a welding screw for fixing the driving motor in the adjusting long hole through a locking nut.

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