Double-lug-handle type hydraulic turbine steel pipe manhole door compression bolt stretching support

Abstract

The utility model discloses a double-lug-handle type hydraulic turbine steel pipe manhole door compression bolt stretching support which 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), a plurality of 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 utility model relates to a tensile support for a manhole door pressing bolt, in particular to a double-ear handle type tensile support for a manhole door pressing bolt of a water turbine steel pipe. Background Technique

[0002] A reaction turbine is composed of four major components: water intake, water guide, work, and drainage. The manhole door of the water turbine steel pipe is arranged at the bottom side below the horizontal section of the penstock of the water turbine water intake component. It is the entrance and exit for turbine maintenance personnel and hydraulic (structure) maintenance workers to enter the interior of the turbine to inspect and repair the water intake and water guide components of the turbine.

[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 manhole door body of the water turbine steel pipe is relatively small, making it very inconvenient to enter and exit. Moreover, if the manhole door is not tightened tightly, leakage is likely to occur. If the manhole door is tightened too tightly, the rubber on the manhole door will fail, also resulting in leakage. Content of the Utility Model

[0004] The purpose of the utility model is to provide a double-ear handle type tensile support for a manhole door pressing bolt of a water turbine steel pipe. It can detect the sealing threshold of the manhole door during the stable movement of pulling the manhole door, avoiding the rubber on the manhole door from failing due to being tightened too tightly, resulting in leakage.

[0005] The technical solution of the utility model: A double-ear handle type tensile support for a manhole door pressing bolt of a water turbine steel pipe, including a load-bearing beam. On both sides of the upper end of the load-bearing beam, there are jacks arranged perpendicular to the load-bearing beam. In the middle of the load-bearing beam, there are multiple groups of balance beam support rods perpendicular to the load-bearing beam. At the upper end of the balance beam support rods, there is a balance beam. In the balance beam, there are symmetrically arranged ear handles. Between the balance beam support rods, there is a guide seat. In the guide seat, there is a dial indicator support that can move relative to the guide seat. In the dial indicator support, there is a dial indicator. On one side of the dial indicator support, there is a connection mechanism for fixing the dial indicator support to the steel pipe.

[0006] In the aforementioned double-ear handle type tensile support for a manhole door pressing bolt of a water turbine steel pipe, the balance beam support rods include a first support rod symmetrically arranged with respect to the midline in the length direction of the load-bearing beam and a second support rod symmetrically arranged with respect to the midline in the width direction of the load-bearing beam.

[0007] In the aforementioned tensile support for the compression bolt of the double-ear handle type penstock manhole door of a water turbine, the guiding seat includes a mounting seat disposed between the first support rods and parallel to the bearing beam. A sleeve is provided in the mounting seat. Limiting grooves for guiding and limiting the dial gauge support are provided on the front and rear sides of the sleeve. An adjustment groove is vertically provided on the sleeve. Limiting plates are provided at the upper and lower ends of the adjustment groove. A lead screw for adjusting the position of the dial gauge support is provided between the limiting plates. A limiting rod parallel to the lead screw is provided on one side of the lead screw. A rotation knob for driving the rotation of the lead screw is provided at the end of the lead screw.

[0008] In the aforementioned tensile support for the compression bolt of the double-ear handle type penstock manhole door of a water turbine, the dial gauge support includes a sliding seat that can move relative to the sleeve. Guide blocks corresponding to the limiting grooves are provided on the front and rear sides of the sliding seat. A fitting block corresponding to the lead screw and the limiting rod is provided on one side of the sliding seat. The fitting block is fixed to the sliding seat through a positioning pin. A support rod for fixing the dial gauge is provided at the lower end of the sliding seat. A fixing seat for fixing the connecting mechanism is provided at the upper end of the sliding seat.

[0009] In the aforementioned tensile support for the compression bolt of the double-ear handle type penstock manhole door of a water turbine, the connecting mechanism includes a telescopic rod connected to the fixing seat. An abutting block for abutting against the inner wall of the penstock is provided at the end of the telescopic rod.

[0010] Compared with the prior art, the present utility model has the following advantages:

[0011] 1. In this application, multiple groups of balance beam support rods perpendicular to the bearing beam are provided to accurately and evenly transfer the force from the balance beam to the bearing beam. Symmetrically arranged ear handles are provided on the balance beam, facilitating more stable pulling of the manhole door.

[0012] 2. When the lead screw drives the sliding seat to move in this application, the connection between the fitting block and the sliding seat is achieved through a positioning pin. After the position is adjusted, the pulling threshold is measured or set through a dial gauge to avoid excessive pulling of the manhole door, causing the sealing rubber to fail and resulting in leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a partial enlarged view of the present utility model;

[0015] Figure 3 is a schematic structural diagram of the guiding seat of the present utility model

[0016] The reference signs in the drawings are as follows: 1 - load-bearing beam, 2 - jack, 3 - balance beam support rod, 4 - balance beam, 5 - ear handle, 6 - guide seat, 7 - dial indicator support, 8 - dial indicator, 9 - first support rod, 10 - second support rod, 11 - mounting seat, 12 - sleeve, 13 - limit groove, 15 - lead screw, 16 - sliding seat, 17 - adjustment groove, 19 - guide block, 20 - limit rod, 21 - rotation knob, 22 - limit plate, 23 - support rod, 24 - mating block, 25 - positioning pin, 26 - fixed seat, 27 - telescopic rod, 28 - abutting block. Detailed implementation manners

[0017] The present utility model will be further described below in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present utility model.

[0018] Embodiment. As shown in Figures 1-3 a double-ear handle type turbine steel pipe manhole door compression bolt stretching bracket, which includes a load-bearing beam 1. On both sides of the upper end of the load-bearing beam 1, there are jacks 2 perpendicular to the load-bearing beam 1. In the middle of the load-bearing beam 1, there are multiple groups of balance beam support rods 3 perpendicular to the load-bearing beam 1. At the upper ends of the balance beam support rods 3, there is a balance beam 4. In the balance beam 4, there are symmetrically arranged ear handles 5. Between the balance beam support rods 3, there is a guide seat 6. In the guide seat 6, there is a dial indicator support 7 that can move relative to the guide seat 6. In the dial indicator support 7, there is a dial indicator 8. On one side of the dial indicator support 7, there is a connecting mechanism for fixing the dial indicator support 7 to the steel pipe.

[0019] The balance beam support rods 3 include a first support rod 9 symmetrically arranged with respect to the midline in the length direction of the load-bearing beam 1 and a second support rod 10 symmetrically arranged with respect to the midline in the width direction of the load-bearing beam 1.

[0020] The guide seat 6 includes a mounting seat 11 arranged between the first support rods 9 and parallel to the load-bearing beam 1. In the mounting seat 11, there is a sleeve 12. On the front and rear sides of the sleeve 12, there are limit grooves 13 for guiding and limiting the dial indicator support 7. On the sleeve 12, there is a vertically arranged adjustment groove 17. At the upper and lower ends of the adjustment groove 17, there are limit plates 22. Between the limit plates 22, there is a lead screw 15 for adjusting the position of the dial indicator support 7. On one side of the lead screw 15, there is a limit rod 20 parallel to the lead screw 15. At the end of the lead screw 15, there is a rotation knob 21 for driving the rotation of the lead screw 15.

[0021] The dial indicator support 7 includes a sliding seat 16 that can move relative to the sleeve 12. On the front and rear sides of the sliding seat 16, there are guide blocks 19 corresponding to the limit grooves 13. On one side of the sliding seat 16, there is a mating block 24 corresponding to the lead screw 15 and the limit rod 20. The mating block 24 is fixed to the sliding seat 16 through a positioning pin 25. At the lower end of the sliding seat 16, there is a support rod 23 for fixing the dial indicator 8. At the upper end of the sliding seat 16, there is a fixed seat 26 for fixing the connecting mechanism.

[0022] The described connecting mechanism includes a telescopic rod 27 connected to the fixed seat 26, and an abutting block 28 for abutting against the inner wall of the steel pipe is provided at the end of the telescopic rod 27.

[0023] The manhole door targeted by this application is installed inside the steel pipe door groove, and the C-shaped support frame is installed outside the steel pipe door groove. There are bolts in the middle of the manhole door, and a handle is provided on one side of the bolts. When the manhole door is locked, the manhole door is pulled outwards and the bolts pass through the C-shaped support frame, and are locked through the cooperation of the bolts and the compression nuts. And the number of compression nuts on each group of bolts is two. This application has two purposes when in use. One is to measure the pulling distance threshold of the manhole door, and the other is to prevent excessive pulling during the subsequent process of pulling the manhole door for sealing, resulting in the failure and leakage of the rubber sheet. When measuring the threshold value, first press the manhole door tightly against the steel pipe door groove, and then realize the connection between this application and the manhole door through the cooperation of the compression nut and the ear handle 5. And the bayonet is located between the two groups of compression nuts, so that the jack 2 faces the outer end of the steel pipe door groove. At this time, the cooperation block 24 is connected to the sliding seat 16 through the positioning pin 25. During the rotation of the lead screw, the lead screw 15 can cooperate with the sliding seat 16 to drive the sliding seat 16 to move relative to the sleeve 12, realizing the position adjustment of the dial indicator bracket 7. After the adjustment is completed, remove the positioning pin 25 so that the sliding seat 16 can move relative to the cooperation block 24, and the position of the cooperation block relative to the bearing beam is determined, reducing the error during the subsequent pulling and sealing of the manhole door, and determining the position of the dial indicator bracket. The measuring end of the dial indicator 8 abuts against the upper end of the bearing beam 1, and the dial indicator 8 is in a compressed state. At this time, the compression amount is set relatively large, and the dial indicator is still in a compressed state when the seal fails. Finally, start the jack 2. The jack 2 uses an existing jack 2. The end of the jack 2 can abut against the outer end of the steel pipe door groove, and cooperate with the bearing beam 1 to drive this application and the manhole door to move away from the steel pipe door groove, so that the manhole door compresses the sealing rubber sheet between the manhole door and the steel pipe door groove, and detects the sealing performance through an existing sealing detection device until the maximum sealing rubber sheet fails, and then the pulling threshold can be measured. During the pulling process, the balance beam support rod accurately and evenly transmits the force from the balance beam to the bearing beam. There are symmetrically arranged ear handles on the balance beam, which facilitates the more stable pulling of the manhole door. During the subsequent process of pulling the manhole door to close through this application, make the pulling distance less than this threshold value to avoid the failure of the rubber sheet and leakage. Although the position of the sliding seat 16 relative to the cooperation block will change during the pulling process, the position of the cooperation block 24 relative to components such as the bearing beam 1 and the balance beam support rod 3 remains unchanged. At this time, push the sliding seat 16 to move to the joint with the cooperation block 24 and lock it through the positioning pin 25 to realize the determination of the initial position of the sliding seat 16. When this application is docked with the manhole door, the position of the sliding seat remains the same, that is, the position of the dial indicator remains the same. At this time, fix the dial indicator bracket 7 on the inner wall of the steel pipe through the connecting mechanism. The connecting mechanism is locked by screwing the telescopic rod so that the abutting block at the end of the telescopic rod is in contact with the inner wall of the steel pipe. The telescopic rod uses an existing telescopic rod with threaded screwing, and remove the positioning pin 25 so that the dial indicator bracket 7 can move relative to the guide seat 6, and set the set value of the dial indicator 8 so that the set value is the pulling threshold detected in the above link. Then start the jack 2 and pull the manhole door through the action of the jack until the dial indicator reading is close to 0.In this way, it can not only pull the manhole door to compress the steel pipe door groove to achieve a better sealing effect, but also prevent excessive pulling, resulting in the occurrence of seal failure. It is more convenient and reliable to use. Finally, remove this application and tighten the compression nut to achieve locking.

Claims

1. A tensile bracket for the compression bolt of the penstock manhole door of a double-ear handle type water turbine, characterized in that, It includes a load-bearing beam (1). On both sides of the upper end of the load-bearing beam (1), there are jacks (2) perpendicular to the load-bearing beam (1). In the middle of the load-bearing beam (1), there are multiple groups of balance beam support rods (3) perpendicular to the load-bearing beam (1). At the upper end of the balance beam support rods (3), there is a balance beam (4). In the balance beam (4), there are symmetrically arranged ear handles (5). Between the balance beam support rods (3), there is a guide seat (6). In the guide seat (6), there is a dial indicator support (7) that can move relative to the guide seat (6). In the dial indicator support (7), there is a dial indicator (8). On one side of the dial indicator support (7), there is a connecting mechanism for fixing the dial indicator support (7) to the steel pipe.

2. The tensile bracket for the compression bolt of the penstock manhole door with double ear handles according to claim 1, characterized in that: The balance beam support rods (3) include a first support rod (9) symmetrically arranged with respect to the midline in the length direction of the load-bearing beam (1) and a second support rod (10) symmetrically arranged with respect to the midline in the width direction of the load-bearing beam (1).

3. The tensile support for the compression bolt of the double-ear handle type penstock manhole door of a water turbine according to claim 2, characterized in that: The guide seat (6) includes a mounting seat (11) arranged between the first support rods (9) and parallel to the load-bearing beam (1). In the mounting seat (11), there is a sleeve (12). On the front and back sides of the sleeve (12), there are limit grooves (13) for guiding and limiting the dial indicator support (7). On the sleeve (12), there is a vertically arranged adjustment groove (17). At the upper and lower ends of the adjustment groove (17), there are limit plates (22). Between the limit plates (22), there is a lead screw (15) for adjusting the position of the dial indicator support (7). On one side of the lead screw (15), there is a limit rod (20) parallel to the lead screw (15). At the end of the lead screw (15), there is a rotation knob (21) for driving the rotation of the lead screw (15).

4. A tensile support for the compression bolts of the manhole door of a double-ear handle type water turbine steel pipe according to claim 1, characterized in that: The dial indicator support (7) includes a sliding seat (16) that can move relative to the sleeve (12). On the front and back sides of the sliding seat (16), there are guide blocks (19) corresponding to the limit grooves (13). On one side of the sliding seat (16), there is a fitting block (24) corresponding to the lead screw (15) and the limit rod (20). The fitting block (24) is fixed to the sliding seat (16) through a positioning pin (25). At the lower end of the sliding seat (16), there is a support rod (23) for fixing the dial indicator (8). At the upper end of the sliding seat (16), there is a fixed seat (26) for fixing the connecting mechanism.

5. A tensile support for the compression bolts of the steel pipe manhole door of a double-ear handle type water turbine according to claim 1, characterized in that: The connecting mechanism includes a telescopic rod (27) connected to the fixed seat (26). At the end of the telescopic rod (27), there is a pressing block (28) for abutting against the inner wall of the steel pipe.

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