Double-lug-handle type hydraulic turbine steel pipe manhole door compression bolt stretching support and using method thereof

Abstract

The invention discloses a double-lug-handle type hydraulic turbine steel pipe manhole door compression bolt stretching support and a using method thereof.The double-lug-handle type hydraulic turbine steel pipe manhole door compression bolt stretching support comprises a bearing beam (1), jacks (2) perpendicular to the bearing beam (1) are arranged on the two sides of the upper end of the bearing beam (1), multiple sets of balance beam supporting rods (3) perpendicular to the bearing beam (1) are arranged in the middle of the bearing beam (1), and balance beams (4) are arranged at the upper ends of the balance beam supporting rods (3); ear handles (5) are symmetrically arranged in the balance beam (4), a guide seat (6) is arranged between the balance beam supporting rods (3), and a dial indicator support (7) capable of moving relative to the guide seat (6) is arranged in the guide seat (6). In the process of pulling the manhole door to move stably, the sealing threshold value of the manhole door can be detected, and leakage caused by failure of rubber on the manhole door due to the fact that the manhole door is pulled too tightly is avoided.

Description

Technical Field

[0001] The invention relates to a manhole door compression bolt tensioning bracket and a use method thereof, in particular to a double-ear handle type turbine steel pipe manhole door compression bolt tensioning bracket and a use method thereof. Background Art

[0002] The reaction turbine is composed of four major parts: water diversion, water guide, working and drainage. The turbine steel pipe manhole door is set at the bottom side of the horizontal section of the pressure steel pipe of the turbine water diversion component. It is the entrance and exit for turbine maintenance personnel and hydraulic (building) maintenance personnel to enter the turbine to inspect and repair the turbine water diversion and water guide components.

[0003] When the manhole door is closed, it is usually necessary to tighten the manhole door and then fix it with bolts. However, the structure of the turbine steel pipe manhole door itself is relatively small, which makes entry and exit very inconvenient. Moreover, if the manhole door is not tightened, leakage is likely to occur. If the manhole door is tightened too much, the rubber on the manhole door will fail and leakage will also occur. Summary of the invention

[0004] The purpose of the present invention is to provide a double-ear handle hydraulic turbine steel pipe manhole door compression bolt tensioning bracket and a use method thereof. The bracket can detect the sealing threshold of the manhole door during the process of pulling the manhole door to move stably, so as to avoid the manhole door being pulled too tight, resulting in failure of the rubber on the manhole door and leakage.

[0005] The technical solution of the present invention is as follows: a double-ear handle type turbine steel pipe manhole door compression bolt tensioning bracket comprises a load-bearing beam, jacks arranged perpendicularly to the load-bearing beam are arranged on both sides of the upper end of the load-bearing beam, a plurality of balance beam support rods perpendicular to the load-bearing beam are arranged in the middle of the load-bearing beam, a balance beam is arranged at the upper end of the balance beam support rod, symmetrically arranged ear handles are arranged in the balance beam, a guide seat is arranged between the balance beam support rods, a dial indicator bracket movable relative to the guide seat is arranged in the guide seat, a dial indicator is arranged in the dial indicator bracket, and a connecting mechanism for fixing the dial indicator bracket to the steel pipe is arranged on one side of the dial indicator bracket.

[0006] In the aforementioned double-ear handle type turbine steel pipe manhole door tightening bolt tensioning bracket, the balance beam support rod includes a first support rod symmetrically arranged with the center line in the length direction of the load-bearing beam and a second support rod symmetrically arranged with the center line in the width direction of the load-bearing beam.

[0007] In the aforementioned double-ear handle type turbine steel pipe manhole door tightening bolt tensioning bracket, the guide seat includes a mounting seat arranged between the first support rods and parallel to the load-bearing beam, a sleeve is provided in the mounting seat, and limit grooves for guiding and limiting the dial indicator bracket are provided on the front and rear sides of the sleeve, a vertically arranged adjustment groove is provided on the sleeve, and limit plates are provided at the upper and lower ends of the adjustment groove, a screw for adjusting the position of the dial indicator bracket is provided between the limit plates, a limit rod parallel to the screw rod is provided on one side of the screw rod, and a rotating knob for driving the screw rod to rotate is provided at the end of the screw rod.

[0008] In the aforementioned double-ear handle type turbine steel pipe manhole door tightening bolt tensioning bracket, the dial indicator bracket includes a sliding seat that can move relative to the sleeve, and the front and rear sides of the sliding seat are provided with guide blocks corresponding to the limit grooves, and one side of the sliding seat is provided with a matching block corresponding to the screw rod and the limit rod. The matching block is fixed to the sliding seat through a locating pin, and the lower end of the sliding seat is provided with a support rod for fixing the dial indicator, and the upper end of the sliding seat is provided with a fixing seat for fixing the connecting mechanism.

[0009] In the aforementioned double-ear handle type turbine steel pipe manhole door tightening bolt tensioning bracket, the connecting mechanism comprises a telescopic rod connected to a fixing seat, and a stop block for abutting against the inner wall of the steel pipe is provided at the end of the telescopic rod.

[0010] The method for using the tension bracket of the compression bolt of the steel pipe manhole door of the double-ear handle type turbine comprises the following steps:

[0011] S1. First, place the manhole door close to the steel pipe door slot, and fix the C-shaped support frame to the outer end of the steel pipe door slot with a clamping nut, and then connect the present application to the manhole door by cooperating with the clamping nut and the bayonet on the ear handle, so that the jack faces the outer end of the steel pipe door slot, the measuring end of the dial indicator abuts against the upper end of the load-bearing beam, and the dial indicator is in a compressed state;

[0012] S2, secondly, start the jack, so that the jack abuts against the outer end of the steel pipe door groove to drive the present application and the manhole door to move away from the steel pipe door groove, and use the sealing detection equipment to detect the sealing of the manhole door and the steel pipe door groove until the sealing rubber on the manhole door fails and the sealing decreases, and record the pulling threshold;

[0013] S3. In the process of closing the manhole door in the future, the present application is also connected to the manhole door, and the position of the dial indicator bracket relative to the guide seat is adjusted, and the measuring head at the end of the dial indicator is made to abut against the upper end face of the load-bearing beam. Then the percentage indication is adjusted so that the compression amount of the end of the dial indicator is less than or equal to the threshold value, and the dial indicator bracket is fixed to the inner wall of the steel pipe through the connecting mechanism so that the dial indicator bracket cannot move relative to the inner wall of the steel pipe, but the dial indicator bracket can move relative to the guide seat. Finally, the present application and the manhole door are pulled outward by the jack until the percentage indication returns to zero, and the present application is removed, and the manhole door is locked by tightening the nut.

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

[0015] 1. The present application accurately and evenly transmits the force from the balance beam to the load-bearing beam by setting multiple groups of balance beam support rods perpendicular to the load-bearing beam. The balance beam is provided with symmetrically arranged ear handles, which facilitates the manhole door to be pulled more stably;

[0016] 2. In the present application, when the screw drives the sliding seat to move, the positioning pin is used to realize the connection between the matching block and the sliding seat. After the position is adjusted, the pull threshold is measured or set by a dial indicator to prevent the manhole door from being pulled beyond the limit, causing the sealing rubber to fail and causing leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a partial enlarged view of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the guide seat of the present invention.

[0020] The markings in the attached drawings are: 1-load-bearing beam, 2-jack, 3-balance beam support rod, 4-balance beam, 5-ear handle, 6-guide seat, 7-dial indicator bracket, 8-dial indicator, 9-first support rod, 10-second support rod, 11-mounting seat, 12-sleeve, 13-limiting groove, 15-screw, 16-sliding seat, 17-adjusting groove, 19-guide block, 20-limiting rod, 21-rotating knob, 22-limiting plate, 23-support rod, 24-matching block, 25-locating pin, 26-fixed seat, 27-telescopic rod, 28-block. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0022] Embodiment. The structure is as follows Figure 1-3 As shown, a double-ear handle type turbine steel pipe manhole door tightening bolt tensioning bracket comprises a load-bearing beam 1, wherein jacks 2 vertically arranged to the load-bearing beam 1 are arranged on both sides of the upper end of the load-bearing beam 1, a plurality of balance beam support rods 3 vertically arranged to the load-bearing beam 1 are arranged in the middle of the load-bearing beam 1, a balance beam 4 is arranged on the upper end of the balance beam support rod 3, symmetrically arranged ear handles 5 are arranged in the balance beam 4, a guide seat 6 is arranged between the balance beam support rods 3, a dial indicator bracket 7 movable relative to the guide seat 6 is arranged in the guide seat 6, a dial indicator 8 is arranged in the dial indicator bracket 7, and a connecting mechanism for fixing the dial indicator bracket 7 to the steel pipe is arranged on one side of the dial indicator bracket 7.

[0023] The balance beam support rod 3 includes a first support rod 9 symmetrically arranged with respect to the center line of the load-bearing beam 1 in the length direction and a second support rod 10 symmetrically arranged with respect to the center line of the load-bearing beam 1 in the width direction.

[0024] The guide seat 6 includes a mounting seat 11 arranged between the first support rods 9 and parallel to the load-bearing beam 1, a sleeve 12 is provided in the mounting seat 11, and limit grooves 13 for guiding and limiting the dial indicator bracket 7 are provided on the front and rear sides of the sleeve 12. A vertical adjustment groove 17 is provided on the sleeve 12, and limit plates 22 are provided at the upper and lower ends of the adjustment groove 17. A screw rod 15 for adjusting the position of the dial indicator bracket 7 is provided between the limit plates 22, and a limit rod 20 parallel to the screw rod 15 is provided on one side of the screw rod 15, and a rotating knob 21 for driving the screw rod 15 to rotate is provided at the end of the screw rod 15.

[0025] The dial indicator bracket 7 includes a sliding seat 16 that can move relative to the sleeve 12. Guide blocks 19 corresponding to the limit grooves 13 are provided on the front and rear sides of the sliding seat 16. A matching block 24 corresponding to the screw rod 15 and the limit rod 20 is provided on one side of the sliding seat 16. The matching block 24 is fixed to the sliding seat 16 through a positioning pin 25. A support rod 23 for fixing the dial indicator 8 is provided at the lower end of the sliding seat 16, and a fixing seat 26 for fixing the connecting mechanism is provided at the upper end of the sliding seat 16.

[0026] The connection mechanism comprises a telescopic rod 27 connected to the fixing seat 26, and an abutment block 28 for abutting against the inner wall of the steel pipe is provided at the end of the telescopic rod 27.

[0027] The method for using the tension bracket of the compression bolt of the steel pipe manhole door of the double-ear handle type turbine comprises the following steps:

[0028] S1. First, place the manhole door close to the steel pipe door groove, and fix the C-shaped support frame on the outer end of the steel pipe door groove with a clamping nut, and then use the clamping nut to cooperate with the bayonet 29 on the ear handle 5 to achieve the connection between the present application and the manhole door, so that the jack 2 faces the outer end of the steel pipe door groove, the measuring end of the dial indicator 8 abuts against the upper end of the load-bearing beam 1, and the dial indicator 8 is in a compressed state;

[0029] S2, secondly, start the jack 2, so that the jack 2 abuts against the outer end of the steel pipe door groove to drive the present application and the manhole door to move away from the steel pipe door groove, and use the sealing detection equipment to detect the sealing of the manhole door and the steel pipe door groove until the sealing rubber on the manhole door fails and the sealing decreases, and record the pulling threshold;

[0030] S3. In the process of closing the manhole door in the future, the present application is also connected to the manhole door, and the position of the dial indicator bracket 7 relative to the guide seat 6 is adjusted, and the measuring head at the end of the dial indicator 8 is made to abut against the upper end surface of the load-bearing beam 1. Then the reading of the dial indicator 8 is adjusted so that the compression amount of the end of the dial indicator 8 is less than or equal to the threshold value, and the dial indicator bracket 7 is fixed to the inner wall of the steel pipe through the connecting mechanism, so that the dial indicator bracket 7 cannot move relative to the inner wall of the steel pipe, and the dial indicator bracket 7 can move relative to the guide seat 6. Finally, the present application and the manhole door are pulled outward by the jack 2 until the percentage indication is zero, and the present application is removed, and the manhole door is locked by tightening the nut.

[0031] The manhole door targeted by this application is arranged on the inner side of the steel pipe door groove, and the C-shaped support frame is arranged on the outer side of the steel pipe door groove. A bolt is arranged in the middle of the manhole door, and a handle is arranged on one side of the bolt. When the manhole door is locked, the manhole door is pulled outward and the bolt passes through the C-shaped support frame, and is locked by the cooperation of the bolt and the clamping nut, and the number of clamping nuts on each group of bolts is two. This application has two purposes when used, one is to measure the threshold of the pulling distance of the manhole door, and the other is to prevent excessive pulling during the subsequent pulling process of the manhole door seal, causing the rubber to fail and leak. When measuring the threshold, first, the manhole door is pressed against the steel pipe door groove, and then the connection between the present application and the manhole door is realized by the combination of the clamping nut and the ear handle 5, and the bayonet is located between the two sets of clamping nuts, so that the jack 2 faces the outer end of the steel pipe door groove. At this time, the matching block 24 is connected to the sliding seat 16 through the locating pin 25. During the rotation of the screw rod, the screw rod 15 can cooperate with the sliding seat 16 to drive the sliding seat 16 to move relative to the sleeve 12, so as to realize the position adjustment of the dial indicator bracket 7. After the adjustment is completed, the locating pin 25 is removed so that the sliding seat 16 can move relative to the matching block 24. The position of the matching block relative to the load-bearing beam is determined, thereby reducing the error when the sealed manhole door is pulled subsequently, and the position of the dial indicator bracket is determined. The measuring end of the dial indicator 8 is abutted against the upper end of the load-bearing beam 1, and the dial indicator 8 is in a compressed state. At this time, the compression amount is set to be large, and the dial indicator is still in a compressed state when the seal fails. Finally, start the jack 2. The jack 2 uses the existing jack 2. The end of the jack 2 can be against the outer end of the steel pipe door groove, and cooperate with the load-bearing beam 1 to drive the present application and the manhole door to move away from the steel pipe door groove, so that the manhole door compresses the sealing rubber between the manhole door and the steel pipe door groove, and detects the sealing performance through the existing sealing detection device until the maximum sealing rubber fails. The pulling threshold can be measured. When pulling, the balance beam support rod accurately and evenly transmits the force from the balance beam to the load-bearing beam. The balance beam is provided with symmetrically arranged ear handles, which facilitates the manhole door to be pulled more stably. In the process of pulling the manhole door closed by the present application, the pulling distance is made less than this threshold to avoid rubber failure and leakage. Although the position of the sliding seat 16 relative to the matching block will change during the pulling process, the position of the matching block 24 relative to the load-bearing beam 1, the balance beam support rod 3 and other components remains unchanged. At this time, the sliding seat 16 is pushed to move to the junction with the matching block 24, and is locked by the positioning pin 25 to determine the initial position of the sliding seat 16, so that when the present application is docked with the manhole door, the position of the sliding seat remains consistent, that is, the position of the dial indicator remains consistent. At this time, the dial indicator bracket 7 is fixed to the inner wall of the steel pipe through the connecting mechanism, and the connecting mechanism is locked by twisting the telescopic rod so that the block at the end of the telescopic rod is connected to the inner wall of the steel pipe. The telescopic rod adopts the existing threaded telescopic rod, and the positioning pin 25 is removed so that the dial indicator bracket 7 can move relative to the guide seat 6, and the setting value of the dial indicator 8 is set, so that the setting value is the pulling threshold detected in the above link, and then the jack 2 is started, and the manhole door is pulled by the action of the jack until the percentage indication number is close to 0.In this way, the manhole door can be pulled to compress the steel pipe door groove to achieve a better sealing effect, and excessive pulling can be prevented, which may cause sealing failure. It is more convenient and reliable to use. Finally, this application is removed and the compression nut is tightened to achieve locking.

Claims

1. A tension bracket for tightening bolts of a double-ear handle hydraulic turbine steel pipe manhole door, characterized in that: The invention comprises a load-bearing beam (1), wherein jacks (2) are arranged perpendicularly to the load-bearing beam (1) on both sides of the upper end of the load-bearing beam (1), a plurality of balance beam support rods (3) are arranged perpendicularly to the load-bearing beam (1) in the middle of the load-bearing beam (1), a balance beam (4) is arranged at the upper end of the balance beam support rod (3), symmetrically arranged ear handles (5) are arranged in the balance beam (4), a guide seat (6) is arranged between the balance beam support rods (3), a dial indicator bracket (7) movable relative to the guide seat (6) is arranged in the guide seat (6), a dial indicator (8) is arranged in the dial indicator bracket (7), and a connecting mechanism for fixing the dial indicator bracket (7) to a steel pipe is arranged on one side of the dial indicator bracket (7).

2. The double-ear handle type turbine steel pipe manhole door compression bolt tensioning bracket according to claim 1, characterized in that: The balance beam support rod (3) comprises a first support rod (9) symmetrically arranged with respect to the center line of the load-bearing beam (1) in the length direction, and a second support rod (10) symmetrically arranged with respect to the center line of the load-bearing beam (1) in the width direction.

3. The double-ear handle type turbine steel pipe manhole door tightening bolt tensioning bracket according to claim 2, characterized in that: The guide seat (6) comprises a mounting seat (11) arranged between the first support rods (9) and parallel to the load-bearing beam (1), a sleeve (12) is arranged in the mounting seat (11), and the sleeve (12) is provided with limit grooves (13) for guiding and limiting the dial gauge bracket (7) at the front and rear sides, and a vertical adjustment groove (17) is arranged on the sleeve (12), and limit plates (22) are arranged at the upper and lower ends of the adjustment groove (17), and a screw rod (15) for adjusting the position of the dial gauge bracket (7) is arranged between the limit plates (22), and a limit rod (20) parallel to the screw rod (15) is arranged on one side of the screw rod (15), and a rotating knob (21) for driving the screw rod (15) to rotate is arranged at the end of the screw rod (15).

4. The double-ear handle type turbine steel pipe manhole door tightening bolt tensioning bracket according to claim 1, characterized in that: The dial gauge bracket (7) comprises a sliding seat (16) movable relative to the sleeve (12); guide blocks (19) corresponding to the limit grooves (13) are provided on the front and rear sides of the sliding seat (16); a matching block (24) corresponding to the screw rod (15) and the limit rod (20) is provided on one side of the sliding seat (16); the matching block (24) is fixed to the sliding seat (16) through a positioning pin (25); a support rod (23) for fixing the dial gauge (8) is provided at the lower end of the sliding seat (16); and a fixing seat (26) for fixing the connecting mechanism is provided at the upper end of the sliding seat (16).

5. The tension bracket for tightening bolts of a double-ear handle hydraulic turbine steel pipe manhole door according to claim 1, characterized in that: The connecting mechanism comprises a telescopic rod (27) connected to a fixing seat (26), and a stopper (28) for abutting against an inner wall of a steel pipe is provided at the end of the telescopic rod (27).

6. The method for using the tensioning bracket for the compression bolt of the steel pipe manhole door of a double-ear handle type turbine according to claims 1-5 is characterized in that: The following steps are involved: S1. First, the manhole door is placed close to the steel pipe door groove, and the C-shaped support frame is fixed to the outer end of the steel pipe door groove with a clamping nut. Then, the clamping nut is matched with the bayonet (29) on the ear handle (5) to realize the connection between the present application and the manhole door, so that the jack (2) faces the outer end of the steel pipe door groove, the measuring end of the dial indicator (8) is in contact with the upper end of the load-bearing beam (1), and the dial indicator (8) is in a compressed state; S2, secondly, starting the jack (2), so that the jack (2) abuts against the outer end of the steel pipe door groove to drive the present application and the manhole door to move away from the steel pipe door groove, and using a sealing detection device to detect the sealing of the manhole door and the steel pipe door groove until the sealing rubber on the manhole door fails and the sealing decreases, and recording the pulling threshold; S3. In the process of closing the manhole door in the future, the present application is also connected to the manhole door, and the position of the dial indicator bracket (7) relative to the guide seat (6) is adjusted, and the measuring head at the end of the dial indicator (8) is made to abut against the upper end surface of the load-bearing beam (1). Then, the reading of the dial indicator (8) is adjusted so that the compression amount of the end of the dial indicator (8) is less than or equal to the threshold value, and the dial indicator bracket (7) is fixed to the inner wall of the steel pipe through the connecting mechanism so that the dial indicator bracket (7) cannot move relative to the inner wall of the steel pipe, and the dial indicator bracket (7) can move relative to the guide seat (6). Finally, the present application and the manhole door are pulled outward by the jack (2) until the percentage indication is zero, and the present application is removed, and the manhole door is locked by tightening the nut.

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