CN212553585U - Power plant guide shoe gap adjusting tool - Google Patents

Abstract

The utility model provides a power plant's guide shoe clearance adjustment instrument, hydraulic wrench passes through the support and is connected with the support frame, perhaps support by atress and rotation regulation nut on the guide shoe oil groove, hydraulic wrench is connected with the controller, the controller is used for controlling hydraulic wrench torque, the support frame is established at guide shoe oil groove opening part, be equipped with the spanner on the support frame, spanner one end is connected through movable fixture block with the support frame, the card of the other end is at the support screw tip, hydraulic wrench rotates regulation nut, the spanner blocks the supporting screw and prevents to rotate. The success rate of adjusting the tile gap can be ensured, so that the efficiency is greatly improved, and the manpower is saved. The spanner is debugged and improved in the maintenance of the power plant unit after being developed, and the effect of improving functions is achieved. The tightening torque of the anti-gravity bolt is ensured to meet the requirement, the tile adjusting torque is accurately controlled, the success rate of tile adjusting operation is improved, and the time of the tile adjusting operation is shortened.

Description

Power plant guide shoe gap adjusting tool

Technical Field

The utility model belongs to the technical field of the adjustment of power plant's guide shoe clearance and specifically relates to a power plant's guide shoe clearance adjustment instrument is related to.

Background

At present, in the adjustment of the gap between an upper guide shoe and a lower guide shoe of a water buffet power plant, the aim of fastening a guide shoe anti-weight bolt is achieved by mainly depending on manpower and hammering a shoe adjusting wrench through a hand hammer with higher pound number. The specific method comprises the following steps: the square head of chucking screw rod tip, then the nut of fastening anti heavy bolt, the screw rod also follows the rotation together when preventing the fastening nut, leads to the change in tile clearance. The diameter of the screw rod of the heavy-duty bolt is 80mm, the size of the opposite side of the nut reaches 120mm, and the size of the heavy-duty bolt is large, so that a tile adjusting wrench for clamping the nut is very heavy, and a large amount of manpower is consumed. In order to ensure that the weight-resistant bolt reaches the required fastening torque, manual adjustment of the tile gap is finished by cooperation of multiple persons all the time, the tile adjusting tool is still a traditional fork spanner, rotation of a screw rod of the weight-resistant bolt is easily caused in the knocking process, so that repeated attempts are needed for adjusting the tile gap, the gap adjustment of one tile consumes a large amount of time, and the working efficiency is very low.

Because the upper oil guide groove has narrow working space, the strength is insufficient when the hand hammer is knocked, the weight-resistant bolt cannot meet the requirement of fastening torque, and when the generator is subjected to expanded repair and start-up tests, the fastening torque of the weight-resistant bolt is insufficient, so that the condition that a large amount of weight-resistant bolts are completely loosened after 154% of load shedding of the unit is caused. According to the problems encountered in the power plant generator expanding and repairing start-up test, a high-reliability tile adjusting tool is needed to be designed, the fastening torque of the anti-weight bolt can be ensured to meet the requirement, the tile adjusting torque is accurately controlled, the success rate of tile adjusting operation is improved, the time of the tile adjusting operation is shortened, the number of tile adjusting operators is reduced, and the working efficiency is improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a power plant's guide shoe clearance adjustment instrument can guarantee that dead bolt fastening torque meets the requirements, when the moment of turning tiles is transferred in accurate control, improves and transfers the operation success rate of turning tiles, shortens the time of transferring the operation of turning tiles, reduces and transfers the operation personnel of turning tiles, improves work efficiency.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a hydraulic wrench is connected with a support bracket through a bracket or is abutted against an oil groove of a guide shoe to bear force and rotate an adjusting nut, the hydraulic wrench is connected with a controller, and the controller is used for controlling the torque of the hydraulic wrench;

the supporting bracket is arranged at the opening of the oil groove of the guide shoe, a spanner is arranged on the supporting bracket, one end of the spanner is connected with the supporting bracket through a movable clamping block, and the other end of the spanner is clamped at the end part of the supporting screw rod;

the hydraulic wrench rotates the adjusting nut, and the wrench clamps the supporting screw to prevent rotation.

In the preferred scheme, be equipped with horizontal branch on the support holder, it has the cell body to open on the horizontal branch, and the spanner pole of spanner passes horizontal branch and movable fixture block, the cell body length on the movable fixture block is greater than the width of spanner pole, and movable fixture block one side is equipped with the pneumatic cylinder, and the flexible end of pneumatic cylinder supports and leans on movable fixture block, and support holder one side is equipped with hydraulic wrench, and hydraulic wrench passes through support and support holder sliding connection. The support bracket comprises a first support plate and a second support plate, and the first support plate and the second support plate are connected through a transverse support rod.

In a preferred scheme, the hydraulic cylinder is arranged on the second support plate or the first support plate.

In the preferred scheme, mounting blocks are arranged on two sides of a sliding groove at the lower end of the movable clamping block, and the lower end faces of the mounting blocks abut against the lower end face of the transverse supporting rod.

In the preferred scheme, the mounting block is connected with the movable clamping block through a plurality of nuts or clamped.

In a preferred scheme, the first support plate is connected with the hydraulic wrench through a transverse support, a sliding block is arranged at the end part of the transverse support, a sliding groove is formed in the first support plate or the second support plate, and the transverse support is in sliding connection with the first support plate or the second support plate through the sliding block sliding groove.

In the preferred scheme, be equipped with square head sleeve on the spanner, square head sleeve and spanner joint.

In the preferred scheme, the spanner is ratchet spanner, and ratchet spanner includes the ratchet, square head sleeve and ratchet joint, the ratchet top is equipped with double-end pawl, and double-end pawl card is on the ratchet, double-end pawl top is equipped with the locking cap, and the locking cap supports and leans on the double-end pawl.

In the preferred scheme, a taper angle is arranged above the double-end pawl, a taper head is arranged below the fixing cap, and the taper head of the fixing cap abuts against one side of the taper angle of the double-end pawl;

the wrench rod is internally provided with a blind hole, the rod body at the upper end of the fixing cap is arranged in the blind hole, and a spring is arranged between the rod body at the upper end of the fixing cap and the blind hole.

The method comprises the following steps:

s1, firstly, mounting the movable fixture block on a transverse support rod of the support bracket, and mounting a mounting block for limiting in the Z-axis direction below the movable fixture block;

s2, mounting a square-head sleeve with a corresponding size on the ratchet wrench, wherein a wrench rod of the ratchet wrench penetrates through the transverse supporting rod and the movable clamping block, and is bound on the movable clamping block through a binding belt;

s3, mounting the hydraulic wrench and the transverse support together, and then sleeving the hydraulic wrench and the transverse support on an adjusting screw cap through a supporting screw rod;

s4, after the hydraulic wrench is installed, clamping the first support plate and the second support plate at the two ends of the assembled support bracket in a sunken table outside an oil groove of the guide shoe, cutting off a binding belt for connecting and fixing the movable clamping block and the wrench rod, and adjusting the position of the ratchet wrench to clamp the square-head sleeve at the end part of the support screw rod;

s5, fixing the first support plate and the second support plate by using a plurality of nuts, and sliding the slide block of the transverse support into the slide groove of the first support plate;

s6, mounting a hydraulic cylinder on the second support plate, wherein the piston end of the hydraulic cylinder is fixedly connected with one side of the movable clamping block;

s7, rotating an adjusting nut of the locking support screw rod out by a hydraulic wrench;

s8, adjusting a double-end pawl of the ratchet wrench, adjusting the rotation direction of the ratchet wrench, pushing a movable clamping block by using a hydraulic cylinder, enabling the movable clamping block to slide on a transverse supporting rod, driving a wrench rod to swing, driving the ratchet wrench to adjust a supporting screw rod by the wrench rod, and adjusting the distance between a guide shoe and a shaft;

s9, after the support screw is adjusted, locking the support screw;

s10, fixing the telescopic rod of the hydraulic cylinder to fix the movable clamping block, and simultaneously enabling the ratchet wrench to obtain the rotation effect of the fixed support screw rod;

s11, opening the hydraulic wrench, enabling the hydraulic wrench to enable the adjusting nut to rotate to be close to the inner wall of the oil groove, enabling the transverse support to slide on the first support plate, enabling the adjusting nut to rotate to lock the supporting screw rod, and enabling the ratchet wrench to fix the supporting screw rod to prevent rotation.

The utility model provides a power plant's guide shoe clearance adjustment instrument can guarantee the success rate of the clearance adjustment of tiles to raise the efficiency greatly, also saved the manpower simultaneously. The spanner is debugged and improved in the maintenance of the power plant unit after being developed, and the effect of improving functions is achieved. Guarantee that dead bolt fastening torque meets the requirements, when the accurate control transfers the tile moment, improve and transfer the tile operation success rate, shorten the time of transferring the tile operation, reduce and transfer the tile operation personnel, improve work efficiency, simple structure, convenient to use is fit for using widely.

Drawings

The invention will be further explained with reference to the following figures and examples:

FIG. 1 is a general block diagram of the present invention;

FIG. 2 is a view showing the structure of the internal installation structure of the oil tank of the present invention;

FIG. 3 is a view of the structure of the adjusting tool of the present invention;

FIG. 4 is a view of the installation structure of the ratchet wrench of the present invention;

FIG. 5 is a view of the installation structure of the movable clamping block of the present invention;

fig. 6 is a sectional view of the ratchet wrench of the present invention:

fig. 7 is the utility model discloses ratchet wrench cut-away side view structure picture:

FIG. 8 is a view showing the installation positions of the adjusting nut, the supporting screw and the oil groove in the guide shoe according to the present invention;

in the figure: a guide shoe 1; a hydraulic cylinder 2; a support bracket 3; a transverse strut 301; a first support plate 302; a second plate 303; a chute 304; a movable clamping block 4; a mounting block 401; a spanner bar 5; a square head sleeve 6; a transverse bracket 7; a hydraulic wrench 8; a support screw 9; a ratchet wrench 10; a ratchet 1001; a double-ended pawl 1002; a fixing cap 1003; a spring 1005; an adjusting nut 11; an oil sump 12.

Detailed Description

Example 1

As shown in fig. 1~8, a power plant's guide shoe clearance adjustment instrument, hydraulic wrench 8 passes through the support and is connected with support holder 3, perhaps support and lean on atress and rotation regulation nut 11 on guide shoe oil groove 12, hydraulic wrench 8 is connected with the controller, the controller is used for controlling 8 torques of hydraulic wrench, support holder 3 is established at guide shoe oil groove 12 opening part, be equipped with the spanner on the support holder 3, spanner one end is connected through movable fixture block 4 with support holder 3, the card of the other end is at the supporting screw 9 tip, hydraulic wrench 8 rotates adjusting nut 11, the spanner blocks supporting screw 9 and prevents rotating. Adopt mechanical hydraulic pressure spanner 8 to come the moment of torsion size that elasticity M80 bolt adjusted hydraulic pressure spanner 8, the too big harm of moment of torsion was adjusted the screw thread between nut 11 and the supporting screw 9 when preventing to dismantle adjusting nut 11, and in the time of rotatory adjusting nut 11, the spanner card is on movable fixture block 4, and movable fixture block 4 is fixed on support bracket 3, plays and prevents supporting screw 9 and the synchronous pivoted effect of adjusting nut 11.

In the preferred scheme, be equipped with horizontal branch 301 on the support holder 3, it has the cell body to open on the horizontal branch 301, is equipped with gliding movable fixture block 4 on the cell body, still is equipped with the spanner, and the spanner rod 5 of spanner passes horizontal branch 301 and movable fixture block 4, the cell body length on the movable fixture block 4 is greater than the width of spanner rod 5, and 4 one sides of movable fixture block are equipped with pneumatic cylinder 2, and the flexible end of pneumatic cylinder 2 supports and leans on movable fixture block 4, and 3 one sides of support holder are equipped with hydraulic wrench 8, and hydraulic wrench 8 passes through support and 3 sliding connection of support holder. The using method comprises the following steps: establish earlier 8 slip covers of hydraulic wrench on supporting screw 9's adjusting nut 11, the spanner card with the adjustment instrument is at supporting screw 9's tip, 5 cards of spanner's spanner pole are on installation piece 401, in the position through 2 fixed mounting pieces 401 of pneumatic cylinder, 8 rotatory adjusting nut 11 that go out of rotatory hydraulic wrench, prevent supporting screw 9 when the spanner prevents rotatory adjusting nut 11 and rotate, adjusting nut 11 is rotatory to be come out the back, it is rotatory to utilize pneumatic cylinder 2 to promote movable fixture block 4 to drive the spanner, the spanner drives supporting screw 9 and rotates the clearance of adjusting between guide shoe and the axle.

In a preferred embodiment, the support frame 3 comprises a first plate 302 and a second plate 303, said first plate 302 and said second plate 303 being connected by a transverse strut 301. The first and second brackets 302, 303 are adapted to be clamped at an edge position outside the oil tank 12, and the first and second brackets 302, 303 are typically fastened by nuts to the edge position outside the oil tank 12.

In a preferred embodiment, the hydraulic cylinder 2 is arranged on the second support plate 303. The movable clamping block 4 is convenient to push to drive the wrench to rotate, and the wrench drives the supporting screw 9 to rotate to adjust the gap between the guide shoe and the shaft.

In the preferred scheme, the two sides of the sliding groove at the lower end of the movable clamping block 4 are provided with mounting blocks 401, and the lower end surfaces of the mounting blocks 401 abut against the lower end surface of the transverse supporting rod 301. The sliding function is achieved due to the limited upward position.

In a preferable scheme, the mounting block 401 is connected with the movable clamping block 4 through a plurality of nuts, or is clamped. The disassembly, the maintenance and the repair are convenient.

In a preferable scheme, the first support plate 302 is connected with the hydraulic wrench 8 through the transverse support 7, a sliding block is arranged at the end of the transverse support 7, a sliding groove 304 is arranged on the first support plate 302, and the transverse support 7 is connected with the first support plate 302 in a sliding mode through the sliding block sliding groove 304. Hydraulic wrench 8 is in the rotation regulation nut 11, and whole support holder 3 can not remove, conveniently tests hydraulic wrench 8 and rotates the fixed guide shoe of 11 locking of regulation nut.

In the preferred scheme, be equipped with square head sleeve 6 on the spanner, square head sleeve 6 and spanner joint. The square head sleeve 6 is used for sleeving the end part of the supporting screw rod 9.

In a preferable scheme, the wrench is a ratchet wrench 10, the ratchet wrench 10 comprises a ratchet 1001, the square-head sleeve 6 is connected with the ratchet 1001 in a clamping mode, a double-end pawl 1002 is arranged above the ratchet 1001, the double-end pawl 1002 is clamped on the ratchet 1001, a fixing cap 1003 is arranged above the double-end pawl 1002, and the fixing cap 1003 abuts against the double-end pawl 1002. The ratchet wrench 10 adopts a large-torque ratchet wrench 10, and adopts a simple ratchet 1001 structure with a double-head pawl 1002, so that the situation of claw breakage can not occur during rotation.

In a preferable scheme, a taper angle is arranged above the double-end pawl 1002, a taper head is arranged below the fixing cap 1003, and the taper head of the fixing cap 1003 abuts against one side of the taper angle of the double-end pawl 1002. The locking cap 1003 is used to fix the direction of oscillation of the double-ended pawl 1002, fixing the direction in which the ratchet wrench 10 is rotated.

In the preferred scheme, a blind hole is formed in the wrench rod 5, the rod body at the upper end of the fixing cap 1003 is arranged in the blind hole, and a spring 1005 is arranged between the rod body at the upper end of the fixing cap 1003 and the blind hole. Preventing adjustment of the direction of the double-ended pawl 1002 controls the direction in which the ratchet wrench 10 rotates.

Example 2

Further described in connection with example 1, structures are shown in FIGS. 1-8. The hydraulic wrench 8 is a hollow wrench, when in use, the adjusting nut 11 is sleeved into the hollow inner hexagonal sleeve, and the hydraulic press provides a driving force of the maximum bearing torque of the M80 bolt, so that the bolt is forced to be loosened and tightened. Support 3 fixes through oil groove 12 apron fixing bolt hole, bears the effort of offsetting the rotatory production of screw rod, and the handle card of chucking square head spanner all is equipped with the U-shaped groove in support frame top activity draw-in groove, activity draw-in groove both ends, and the purpose is for blocking the spanner handle in order, and activity draw-in groove installs on support's crossbeam, and it is spacing fixed to come light with the handle through adjustment activity draw-in groove when the different angles of spanner handle. A transverse bracket 7 is additionally arranged at the end part of the hydraulic wrench, the transverse bracket 7 is abutted against the first support plate 302, and the transverse bracket 7 provides a supporting point for a reaction arm of the hydraulic wrench 8, so that the hydraulic wrench 8 can work smoothly. On the whole, adopt mechanical hydraulic wrench 8 to come elasticity M80 bolt, the dedicated square head sleeve 6 of cooperation, support bracket 3 can guarantee tile clearance adjustment's success rate to raise the efficiency greatly, also saved the manpower simultaneously. After the spanner is researched and developed, debugging and improvement are carried out in the unit overhaul of the poeblock power plant, and the effect of perfecting functions is achieved.

According to the design of the existing design thought, the design and the processing of the mechanical tightening bolt tool set are carried out. The on-site debugging and checking of the mechanical loose bolt tool set are carried out, the performance of the mechanical loose bolt tool set is checked, the checking and accepting of the mechanical loose bolt tool set are completed by an overhaul generator class, and in the debugging and checking process, if a place needing to be improved is found, the improvement is designed and completed according to the use condition.

Item reference criteria or primary basis: GB 26164.1-2010 electric industry safety work rules; GB50231-98 general standard for mechanical equipment installation engineering construction and acceptance

The technical requirements are as follows: the fastening torque requirements of the upper guide M80 and the lower guide M80 heavy-duty bolts are met, and the heavy-duty bolts are ensured not to loosen; the one-time success rate of adjusting the guide shoe gap is ensured to be more than 90 percent; the tool operator does not exceed 2 persons; the time for adjusting the gap of the single guide shoe is controlled within 10 minutes; the tool design is humanized, the operation is simple, and the use is safe and reliable.

Example 3

To further explain with reference to embodiments 1 and 2, as shown in fig. 1-8, the movable fixture 4 is first mounted on the transverse strut 301 of the support bracket 3, and a mounting block 401 for limiting the Z-axis direction is mounted below the movable fixture 4.

The ratchet wrench 10 is provided with a square head sleeve 6 with a corresponding size, a wrench rod 5 of the ratchet wrench 10 penetrates through the transverse supporting rod 301 and the movable clamping block 4, and the wrench rod 5 is bound on the movable clamping block 4 through a binding belt.

The hydraulic wrench 8 and the transverse bracket 7 are installed together and then sleeved on the adjusting nut 11 through the supporting screw rod 9.

After the hydraulic wrench 8 is installed, the first support plate 302 and the second support plate 303 at the two ends of the assembled support bracket 3 are clamped in the sunken table outside the oil groove 12 of the guide shoe 1, a binding tape for connecting and fixing the movable clamping block 4 and the wrench rod 5 is cut off, and the position of the ratchet wrench 10 is adjusted, so that the square-head sleeve 6 is clamped at the end part of the support screw 9.

The first and second brackets 302 and 303 are fixed by a plurality of nuts, and the slider of the lateral bracket 7 is slid into the slide groove 304 of the first bracket 302.

The second support plate 303 is provided with a hydraulic cylinder 2, and the piston end of the hydraulic cylinder 2 is fixedly connected with one side of the movable clamping block 4.

The hydraulic wrench 8 rotates out the adjusting nut 11 which locks the support screw 9.

The double-end pawl 1002 of the ratchet wrench 10 is adjusted, the rotation direction of the ratchet wrench 10 is adjusted, the hydraulic cylinder 2 is utilized to push the movable clamping block 4, the movable clamping block 4 slides on the transverse supporting rod 301, the wrench rod 5 is driven to swing, the wrench rod 5 drives the ratchet wrench 10 to adjust the supporting screw 9, and the purpose of adjusting the distance between the guide shoe 1 and the shaft is achieved.

And after the support screw 9 is adjusted, the support screw 9 is locked.

The telescopic rod of the hydraulic cylinder 2 is fixed, the movable clamping block 4 is fixed, and the ratchet wrench 10 also has the effect of fixing and supporting the screw rod 9 to rotate.

The hydraulic wrench 8 is turned on, the adjusting nut 11 is rotated by the hydraulic wrench 8 to be close to the inner wall of the oil groove 12, and meanwhile, the transverse support 7 also slides on the first support plate 302, so that the adjusting nut 11 rotates to lock the supporting screw 9, and the ratchet wrench 10 fixes the supporting screw 9 to prevent rotation.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and should not be considered as limitations of the present invention, and the protection scope of the present invention should be defined by the technical solutions described in the claims, and includes equivalent alternatives of technical features in the technical solutions described in the claims. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims (10)

1. The utility model provides a power plant's guide shoe clearance adjustment instrument which characterized by: the hydraulic wrench (8) is connected with the support bracket (3) through a bracket, or abuts against the guide shoe oil groove (12) to be stressed and rotates the adjusting nut (11), the hydraulic wrench (8) is connected with a controller, and the controller is used for controlling the torque of the hydraulic wrench (8);

the supporting bracket (3) is arranged at an opening of the oil guide groove (12), a wrench is arranged on the supporting bracket (3), one end of the wrench is connected with the supporting bracket (3) through a movable clamping block (4), and the other end of the wrench is clamped at the end part of the supporting screw rod (9);

the hydraulic wrench (8) rotates the adjusting nut (11), and the wrench clamps the supporting screw rod (9) to prevent rotation.

2. The power plant guide shoe gap adjustment tool of claim 1, wherein: a transverse supporting rod (301) is arranged on the supporting bracket (3), a groove body is formed in the transverse supporting rod (301), a wrench rod (5) of the wrench penetrates through the transverse supporting rod (301) and the movable clamping block (4), the length of the groove body in the movable clamping block (4) is larger than the width of the wrench rod (5), a hydraulic cylinder (2) is arranged on one side of the movable clamping block (4), the telescopic end of the hydraulic cylinder (2) abuts against the movable clamping block (4), a hydraulic wrench (8) is arranged on one side of the supporting bracket (3), and the hydraulic wrench (8) is connected with the supporting bracket (3) in a sliding mode through the bracket;

the support bracket (3) comprises a first support plate (302) and a second support plate (303), the first support plate (302) and the second support plate (303) being connected by a transverse strut (301).

3. The power plant guide shoe gap adjustment tool of claim 1, wherein: the hydraulic cylinder (2) is arranged on the second support plate (303) or the first support plate (302).

4. The power plant guide shoe gap adjustment tool of claim 1, wherein: mounting blocks (401) are arranged on two sides of the sliding groove at the lower end of the movable clamping block (4), and the lower end faces of the mounting blocks (401) abut against the lower end face of the transverse supporting rod (301).

5. The power plant guide shoe gap adjustment tool of claim 4, wherein: the mounting block (401) is connected with the movable fixture block (4) through a plurality of nuts or clamped.

6. The power plant guide shoe gap adjustment tool of claim 1, wherein: the first support plate (302) is connected with a hydraulic wrench (8) through a transverse support (7), a sliding block is arranged at the end of the transverse support (7), a sliding groove (304) is formed in the first support plate (302) or the second support plate (303), and the transverse support (7) is in sliding connection with the first support plate (302) or the second support plate (303) through the sliding block sliding groove (304).

7. The power plant guide shoe gap adjustment tool of claim 1, wherein: the wrench is provided with a square head sleeve (6), and the square head sleeve (6) is clamped with the wrench.

8. The power plant guide shoe gap adjustment tool of claim 7, wherein: the spanner is ratchet spanner (10), and ratchet spanner (10) include ratchet (1001), square head sleeve (6) and ratchet (1001) joint, and ratchet (1001) top is equipped with double-end pawl (1002), and double-end pawl (1002) card is on ratchet (1001), double-end pawl (1002) top is equipped with locking cap (1003), and locking cap (1003) support and lean on double-end pawl (1002).

9. The power plant guide shoe gap adjustment tool of claim 8, wherein: the upper portion of the double-end pawl (1002) is provided with a taper angle, the lower portion of the fixing cap (1003) is provided with a taper head, and the taper head of the fixing cap (1003) abuts against one side of the taper angle of the double-end pawl (1002).

10. The power plant guide shoe gap adjustment tool of claim 9, wherein: the wrench rod is characterized in that a blind hole is formed in the wrench rod (5), the rod body at the upper end of the fixing cap (1003) is arranged in the blind hole, and a spring (1005) is arranged between the rod body at the upper end of the fixing cap (1003) and the blind hole.

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