CN217878300U - Sealed locking-ingot screw rod throwing and withdrawing tool for water inlet ball valve maintenance of hydropower station - Google Patents

Abstract

The utility model discloses a sealing locking ingot screw rod putting-in and putting-out tool for the maintenance of a water inlet ball valve of a hydropower station, which comprises a pushing mechanism, a ratchet mechanism, a transmission mechanism and a locking limiting mechanism; a ratchet sleeve is arranged in the ratchet mechanism, and a ratchet sleeve opening of the ratchet sleeve acts on the locking screw rod; the pushing direction of the pushing mechanism is vertical to the arrangement direction of the ratchet sleeve; the action end of the pushing mechanism is in transmission connection with a ratchet ring of the ratchet mechanism through a transmission mechanism; the locking limiting mechanism is in limiting connection with the ratchet mechanism; the utility model discloses a data report form is formed to each scale mark reading data in this application, and the ball valve overhauls sealed internal pressure condition and overhauls sealed locking spindle screw health degree through moment size when overhauing each time, screw in degree of depth; the condition of the locking spindle screw rod in and out can be observed more visually through a sleeve scale arranged on the ratchet sleeve; through the arrangement of the force arm shell and the ratchet wheel shell, other tools are completely surrounded, and the tools are not easy to fall off in the using process.

Description

Sealed locking screw rod of power station water inlet ball valve maintenance is thrown and is moved back instrument

Technical Field

The utility model relates to a hydroelectric power station ball valve safety technical field that intakes especially relates to a power station ball valve that intakes overhauls sealed locking spindle screw rod and throws back instrument.

Background

The design of the sealed locking-ingot screw throwing and withdrawing tool for the water inlet ball valve maintenance of the hydropower station is designed for safety consideration during equipment maintenance. When the hydraulic turbine unit is shut down, the water inlet ball valve of the unit is fully closed, and the ball valve is put into a working seal and a ball valve maintenance seal. After the ball valve maintenance seal is put in place, the locking spindle screw rod is manually operated by field mechanical personnel to lock the piston ring, so that the piston ring is prevented from being disengaged, and the sealing performance of the maintenance seal and the safety of personnel and equipment during maintenance are ensured.

The application of the overhaul sealing ingot locking device in the hydropower station industry is very common. The hydropower station involves the safety measure related to the ball valve and all can carry out this safety measure, when overhauing sealed locking spindle device and throwing into not in place, may cause the ball valve that intakes to overhaul during the maintenance to overhaul sealed and withdraw from to arouse into a large amount of water ball valves and leak, seriously threaten maintainer personal safety, when overhauing sealed locking spindle device and withdraw from not in place, can cause the ball valve that intakes to overhaul sealed and can't withdraw from and put in place, can damage the maintenance seal at the ball valve switching in-process of intaking. Therefore, it is very important to ensure that the sealing locking ingot screw for the water inlet ball valve overhaul of the unit is correctly put in and taken out in place according to the regulations.

At present, a traditional hydropower station generally adopts a manual mode to throw in and withdraw from, whether the locking screw is put in place or not is comprehensively judged according to the depth suggested by a specification, the depth limited by a limiter, the past experience and the like, and the traditional operation has the following problems.

1. The maintenance sealing locking screw rod is positioned in the circumferential surrounding of the maintenance sealing of the water inlet ball valve of the unit, and needs to be operated by operators at high altitude during operation, so that the operation at high altitude by using various tools is inconvenient in the process of putting and withdrawing;

2. at present, a part of ball valve overhauling sealing locking screw rods are not provided with limiting devices, the throwing-in and withdrawing depth is generally operated through personal experience and hand feeling, and errors possibly exist due to different behavior habits of each person;

3. the ball valve works in a humid environment for a long time and is influenced by environmental factors, the thread structure of a locking screw of the ball valve is easily corroded and mechanically damaged, the throwing and retreating depth of the screw may change along with the lapse of time, and the traditional mode cannot visually compare and analyze the data;

4. part tradition overhauls sealed locking spindle screw rod and does not have protection device, once the excessive operation withdraws from, and the locking spindle screw rod jets out under the effect of high oil pressure intensity of pressure, may cause operating personnel to be injured.

Therefore, a hydropower station water inlet ball valve maintenance sealing locking ingot screw rod throwing and retreating tool needs to be developed to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the above problems and designing a hydropower station water inlet ball valve overhaul sealing locking ingot screw rod throwing and withdrawing tool.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the utility model provides a power station ball valve that intakes overhauls sealed locking spindle screw rod and throws instrument of moving back, includes:

a pushing mechanism;

a ratchet mechanism; a ratchet sleeve is arranged in the ratchet mechanism, and a ratchet sleeve opening of the ratchet sleeve acts on the locking screw rod; the pushing direction of the pushing mechanism is vertical to the arrangement direction of the ratchet sleeve;

a transmission mechanism; the action end of the pushing mechanism is in transmission connection with a ratchet ring of the ratchet mechanism through a transmission mechanism;

a locking limit mechanism for limiting the rotation of the ratchet mechanism in one direction; the locking limiting mechanism is connected with the ratchet mechanism in a limiting way.

Specifically, the pushing mechanism includes:

a rotary telescopic structure; the rotating end of the rotary telescopic structure is sleeved on the outer wall of the force arm shell;

a nitrogen spring;

a force arm;

a force arm housing; the nitrogen spring and the force arm are both arranged in the force arm shell; the action end of the rotary telescopic structure is connected with the first end of the nitrogen spring, the second end of the nitrogen spring is connected with the first end of the force arm, and the second end of the force arm is connected with the transmission mechanism.

Further, the rotary telescopic structure includes:

moving the sleeve; the movable sleeve is arranged in the force arm shell and is placed above the sliding bulge;

a main adjustment scale; the inner wall of the main adjusting scale is provided with an internal thread, the force arm shell is provided with an external thread, and the main adjusting scale thread is sleeved on the force arm shell; still be provided with the slip arch on the inner wall of main regulation scale, correspondingly, seted up the spiral spout on the arm of force shell, slip arch slidable installs in the spiral spout.

Furthermore, a main scale mark is arranged on the circumference of the main adjusting scale, and an auxiliary differential scale mark is arranged on the force arm shell.

Furthermore, a plurality of annular limiting blocks are arranged in the force arm shell and are arranged between the force arm and the force arm shell.

Specifically, the transmission mechanism includes:

connecting blocks;

a first bearing; the first bearing is arranged at the first end of the connecting block; the first bearing is contacted with the second end of the force arm;

a ratchet wheel force guiding fluted disc; the second end of the connecting block is rotatably connected with the ratchet force guide fluted disc; the ratchet force guide fluted disc is also meshed with the ratchet mechanism;

fixing a steering knuckle; the ratchet wheel force guide fluted disc is rotatably arranged in the force arm shell through the fixed steering knuckle.

Specifically, the ratchet mechanism includes:

a ratchet housing; the ratchet wheel shell is internally provided with a mounting groove, and the lower end of the ratchet wheel shell is connected with the force arm shell;

a ratchet ring; the ratchet ring is in transmission connection with the transmission mechanism;

a second bearing; one side of the ratchet ring is connected with the outer ring of the second bearing; the inner ring of the second bearing is connected with the ratchet wheel shell;

a ratchet plate; the ratchet wheel disc is arranged at the center of the ratchet wheel ring, and a through sliding opening is axially formed in the center of the ratchet wheel disc; the ratchet sleeve is slidably arranged in the sliding port;

a sleeve spring; the sleeve spring suit is on ratchet sleeve outer wall, and sleeve spring's one end fixed mounting is on ratchet sleeve outer wall, and sleeve spring's the other end fixed mounting is on the lateral wall of ratchet shell.

Preferably, a sleeve scale limiting block is arranged on the ratchet sleeve and is arranged on the opposite side of the ratchet shell where the spring is arranged; a sleeve scale is arranged along the length direction of the ratchet sleeve.

Specifically, the locking limit mechanism includes:

the ratchet wheel locks the spindle blade right;

the left ratchet wheel spindle locking rod; the middle parts of the ratchet left ingot locking rod and the ratchet right ingot locking rod are rotatably arranged in the arm of force shell; the first end of the ratchet left ingot locking rod is used for locking the ratchet ring to rotate in a first direction; the first end of the right ratchet ingot locking rod is used for locking the ratchet ring to rotate in a second direction, and the first direction is opposite to the second direction;

a direction key self-locking structure; two ends of the direction key self-locking structure are respectively connected with the second end of the ratchet wheel left ingot locking rod and the second end of the ratchet wheel right ingot locking rod;

a direction switching key; the direction switching groove is formed in the force arm shell, the direction switching key is slidably mounted in the direction switching groove, the handle end of the direction switching key is arranged outside the force arm shell, and the acting end of the direction switching key is connected with the middle of the direction key self-locking structure;

positioning a limiting block; the positioning limiting block is arranged in the force arm shell; when the direction key self-locking structure slides to two working positions, the direction key self-locking structure is locked and matched with the positioning limiting block.

Preferably, the locking limit mechanism further comprises:

a first return spring; the first return spring is arranged between the second end of the ratchet left ingot locking rod and the inner wall of the arm of force shell;

a second return spring; the second reset spring is arranged between the second end of the ratchet right ingot locking rod and the inner wall of the force arm shell.

The beneficial effects of the utility model reside in that:

data can be read through the scale marks of each scale in the method to form a data report, and the internal pressure condition of the ball valve maintenance seal and the health degree of the maintenance seal locking screw rod are judged through the torque and the screwing-in depth during maintenance each time;

the depth of the locking spindle screw can be known in real time through a sleeve scale arranged on the ratchet sleeve, and the situation of the locking spindle screw in and out can be observed more visually;

compared with the common spring, the nitrogen spring has more stable elasticity coefficient and is not influenced by environmental factors such as the humidity of a ball valve layer;

because the force arm shell and the ratchet wheel shell are arranged, other tools are completely surrounded, and the tools are not easy to fall off in the using process.

Drawings

FIG. 1 is a front cross-sectional view of the present application;

FIG. 2 is an enlarged view of a portion of the structure of FIG. 1;

FIG. 3 is an enlarged view of a portion of the structure of FIG. 1;

FIG. 4 is a front cross-sectional view of the second embodiment of the present application;

FIG. 5 is an enlarged view of a portion of the structure of FIG. 4;

FIG. 6 is a side cross-sectional view of the present application;

FIG. 7 is an enlarged view of a portion of the structure of FIG. 6;

FIG. 8 is a schematic view of the engagement structure of the main adjustment scale and the shift sleeve of the present application;

FIG. 9 is a partial schematic view of the ratchet mechanism of the present application;

in the figure: 1. a grip; 2. connecting a buckle; 3. a main adjustment scale; 4. a main adjustment scale main tick mark; 5. sub differential scale lines; 6. a nitrogen spring; 7. a force arm; 8. a force arm housing; 9. an annular stop block; 10. connecting blocks; 11. a direction switching key; 12. the ratchet wheel locks the spindle blade right; 13. the left ratchet wheel spindle locking rod; 14. a direction key self-locking structure; 15. a ratchet housing; 16. a ratchet ring; 17. a second bearing; 18. a ratchet sleeve; 19. a ratchet sleeve opening; 20. a ratchet wheel disc; 21. fixing a steering knuckle; 22. a ratchet wheel force guide fluted disc; 23. a first bearing; 24. a sleeve spring; 25. a sleeve scale; 26. a sleeve scale limiting block; 29. positioning a limiting block; 30. a first return spring; 31. a second return spring; 32. the sleeve is moved.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be broadly construed, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following describes in detail embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1, 4, 6, a sealed locking ingot screw of power station ball valve that intakes overhauls tool that moves back includes:

a pushing mechanism;

a ratchet mechanism; a ratchet sleeve 18 is arranged in the ratchet mechanism, and a ratchet sleeve opening 19 of the ratchet sleeve 18 acts on the locking spindle screw rod; the pushing direction of the pushing mechanism is vertical to the arrangement direction of the ratchet sleeve 18;

a transmission mechanism; the action end of the pushing mechanism is in transmission connection with a ratchet ring 16 of the ratchet mechanism through a transmission mechanism;

a locking limit mechanism for limiting the rotation of the ratchet mechanism in one direction; the locking limit mechanism is connected with the ratchet mechanism in a limiting way.

As shown in fig. 1 and 3, the pushing mechanism includes:

a rotary telescopic structure; the rotating end of the rotary telescopic structure is sleeved on the outer wall of the force arm shell 8;

a nitrogen spring 6;

a force arm 7;

a moment arm shell 8; the nitrogen spring 6 and the force arm 7 are both arranged in the force arm shell 8; the action end of the rotary telescopic structure is connected with the first end of the nitrogen spring 6, the second end of the nitrogen spring 6 is connected with the first end of the force arm 7, and the second end of the force arm 7 is connected with the transmission mechanism.

As shown in fig. 3 and 8, the rotary telescopic structure includes:

a traveling sleeve 32; the movable sleeve 32 is arranged in the arm shell 8 and is placed above the sliding bulge;

a main adjustment scale 3; the inner wall of the main adjusting scale 3 is provided with internal threads, the force arm shell 8 is provided with external threads, and the main adjusting scale 3 is sleeved on the force arm shell 8 through threads; the inner wall of the main adjusting scale 3 is also provided with a sliding bulge, correspondingly, the force arm shell 8 is provided with a spiral chute, and the sliding bulge is slidably arranged in the spiral chute.

As shown in fig. 3, a main adjustment scale main scale mark 4 is provided in the circumferential direction of the main adjustment scale 3, and a sub differential scale mark 5 is provided on the arm case 8. The main scale mark 4 of the main adjusting scale is used for identifying the torque; the auxiliary differential scale line 5 is used for reading in combination with the main scale line 4 of the main adjusting scale to obtain the torque force arm 7, and the reading mode in the application is the same as that of a screw micrometer, and is not described in the application;

as shown in fig. 1, two annular limit blocks 9 are arranged in the arm shell 8, and the two annular limit blocks 9 are arranged between the arm 7 and the arm shell 8. The two annular limit blocks 9 are used for limiting the radial swing of the force arm 7 and playing a role in axial guiding.

As shown in fig. 4 and 5, the transmission mechanism includes:

a connecting block 10;

a first bearing 23; the first bearing 23 is installed at the first end of the connecting block 10; the first bearing 23 is in contact with the second end of the moment arm 7;

a ratchet force guide fluted disc 22; the second end of the connecting block 10 is rotatably connected with the ratchet force guiding fluted disc 22; the ratchet force guide fluted disc 22 is also meshed with the ratchet mechanism;

a fixed knuckle 21; the ratchet force guiding fluted disc 22 is rotatably arranged in the force arm shell 8 through the fixed steering knuckle 21.

As shown in fig. 1, 2, 6, 7, and 9, the ratchet mechanism includes:

a ratchet housing 15; an installation groove is arranged in the ratchet wheel shell 15, and the lower end of the ratchet wheel shell 15 is connected with the force arm shell 8;

a ratchet ring 16; the ratchet ring 16 is in transmission connection with the transmission mechanism;

a second bearing 17; one side of the ratchet ring 16 is connected with the outer ring of the second bearing 17; the inner ring of the second bearing 17 is connected with the ratchet shell 15;

a ratchet plate 20; the ratchet wheel disc 20 is arranged at the center of the ratchet wheel ring 16, and a through sliding opening is axially formed in the center of the ratchet wheel disc 20; the ratchet sleeve 18 is slidably mounted within the slide;

a sleeve spring 24; the sleeve spring 24 is sleeved on the outer wall of the ratchet sleeve 18, one end of the sleeve spring 24 is fixedly installed on the outer wall of the ratchet sleeve 18, and the other end of the sleeve spring 24 is fixedly installed on the side wall of the ratchet shell 15.

As shown in fig. 7, a sleeve scale limiting block 26 is arranged on the ratchet sleeve 18, and the sleeve scale limiting block 26 is arranged on the opposite side of the ratchet shell 15 where the spring is arranged; a sleeve scale 25 is provided along the length of the ratchet sleeve 18.

As shown in fig. 1 and 2, the locking and limiting mechanism includes:

a ratchet right spindle locking rod 12;

a ratchet left locking bar 13; the middle parts of the ratchet left ingot locking rod 13 and the ratchet right ingot locking rod 12 are rotatably arranged in the force arm shell 8; a first end of ratchet left-locking lever 13 is used to lock ratchet ring 16 for rotation in a first direction; a first end of the ratchet right ingot locking rod 12 is used for locking the ratchet ring 16 to rotate in a second direction, and the first direction is opposite to the second direction;

a direction key self-locking structure 14; two ends of the direction key self-locking structure 14 are respectively connected with the second end of the ratchet left ingot locking rod 13 and the second end of the ratchet right ingot locking rod 12;

a direction switching key 11; a direction switching groove is formed in the force arm shell 8, a direction switching key 11 can be slidably mounted in the direction switching groove, the handle end of the direction switching key 11 is arranged outside the force arm shell 8, and the acting end of the direction switching key 11 is connected with the middle part of a direction key self-locking structure 14;

a positioning stopper 29; the positioning limiting block 29 is arranged in the force arm shell 8; when the direction key self-locking structure 14 slides to two working positions, the two working positions are locked and matched with the positioning limiting block 29. Two positioning holes are formed in the positioning limiting block 29, correspondingly, a positioning block is arranged on the direction key self-locking structure, when the direction key self-locking structure 14 slides to the working position, the positioning block is inserted into the positioning hole for positioning, and in addition, the positioning holes can be of an arc-shaped structure, so that the positioning block can conveniently slide out when the direction switching key 11 is pushed.

As shown in fig. 2, the locking and limiting mechanism further includes:

a first return spring 30; the first return spring 30 is arranged between the second end of the ratchet left locking ingot rod 13 and the inner wall of the force arm shell 8;

a second return spring 31; the second return spring 31 is arranged between the second end of the ratchet right ingot locking rod 12 and the inner wall of the force arm shell 8.

The utility model also comprises a handle 1, the handle 1 is connected with the lower end of the force arm shell 8; in addition be provided with connect buckle 2 on handle 1, connect buckle 2 includes third reset spring and fixture block, the sliding tray has radially been seted up to handle 1, the first end and the bottom of sliding tray of third reset spring are connected, the second end and the fixture block of third reset spring are connected, fixture block part protrusion arm of force shell 8 sets up when not using, when using, press the fixture block with the hand, third reset spring is compressed, then the fixture block retracts in the sliding tray, can embolia the extension handle that has the safety control hole this time, play the effect of increasing handle 1 length.

The working principle is as follows:

the main adjusting scale 3 rotates, then the main adjusting scale 3 rises or falls, the sliding protrusion on the inner wall of the main adjusting scale 3 lifts or drops the movable sleeve 32, the movable sleeve 32 acts on the nitrogen spring 6 upwards, the nitrogen spring 6 acts on the force arm 7 upwards, the upper end of the force arm 7 pushes the connecting block 10 upwards, the upper end of the connecting block 10 pushes the ratchet wheel force guiding fluted disc 22, the ratchet wheel force guiding fluted disc 22 rotates around the fixed steering knuckle 21, the ratchet wheel force guiding fluted disc 22 is meshed with the outer teeth of the ratchet wheel ring 16, so that the ratchet wheel ring 16 is pushed to rotate towards one direction, finally the ratchet wheel ring 16 rotates to drive the ratchet wheel sleeve 18 installed in the ratchet wheel to rotate, and screwing-in and screwing-out operation of the locking spindle screw is achieved.

When torsion is applied to the locking screw rod and the torsion value does not exceed a set range, the locking screw rod can be continuously screwed in and out through the tool under the action of the lever. When the torque force required by the rotating locking spindle screw is larger than the set torque force, the nitrogen spring 6 can not bear the force transmitted by the lever principle, the nitrogen spring 6 sinks, the engaging force of the ratchet wheel force guiding fluted disc 22 and the ratchet wheel is reduced, and finally the two are slipped, and the torque force at the moment can be converted through a torque formula.

When sleeve scale stopper 26 contacts with the left side of ratchet shell 15, observe sleeve scale 25 data and be 0, when pressing this device right, ratchet sleeve 18 moves to the left side, and sleeve scale 25 data increase, through the data of observing sleeve scale 25, ratchet sleeve 18 can observe the locking spindle screw in degree of depth this moment in real time.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and embellishments can be made without departing from the technical principle of the present invention, and these improvements and embellishments should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a power station ball valve that intakes overhauls sealed locking ingot screw rod and throws instrument back which characterized in that includes:

a pushing mechanism;

a ratchet mechanism; a ratchet sleeve is arranged in the ratchet mechanism, and a ratchet sleeve opening of the ratchet sleeve acts on the locking screw rod; the pushing direction of the pushing mechanism is vertical to the arrangement direction of the ratchet sleeve;

a transmission mechanism; the action end of the pushing mechanism is in transmission connection with a ratchet ring of the ratchet mechanism through a transmission mechanism;

a locking limit mechanism for limiting the rotation of the ratchet mechanism in one direction; the locking limiting mechanism is connected with the ratchet mechanism in a limiting way.

2. The hydropower station water inlet ball valve overhaul sealing locking ingot screw rod throwing and withdrawing tool as claimed in claim 1, wherein the pushing mechanism comprises:

a rotary telescopic structure; the rotating end of the rotary telescopic structure is sleeved on the outer wall of the force arm shell;

a nitrogen spring;

a force arm;

a force arm shell; the nitrogen spring and the force arm are both arranged in the force arm shell; the action end of the rotary telescopic structure is connected with the first end of the nitrogen spring, the second end of the nitrogen spring is connected with the first end of the force arm, and the second end of the force arm is connected with the transmission mechanism.

3. The sealed locking ingot screw of power station ball valve maintenance that intakes according to claim 2 throws and moves back instrument, its characterized in that, rotatory extending structure includes:

moving the sleeve; the movable sleeve is arranged in the force arm shell and is placed above the sliding bulge;

a main adjustment scale; the inner wall of the main adjusting scale is provided with an internal thread, the force arm shell is provided with an external thread, and the main adjusting scale thread is sleeved on the force arm shell; the inner wall of the main adjusting scale is also provided with a sliding bulge, correspondingly, the force arm shell is provided with a spiral chute, and the sliding bulge is slidably arranged in the spiral chute.

4. The tool for putting in and out a sealing locking ingot screw for the hydropower station water inlet ball valve overhaul according to claim 3, wherein a main scale mark is arranged on the circumference of a main adjusting scale, and an auxiliary differential scale mark is arranged on a force arm shell.

5. The tool for turning on and off the sealing locking ingot screw for overhauling the water inlet ball valve of the hydropower station according to claim 2, is characterized in that a plurality of annular limiting blocks are arranged in the force arm shell, and the plurality of annular limiting blocks are arranged between the force arm and the force arm shell.

6. The hydropower station water inlet ball valve overhauling sealing locking ingot screw throwing and retreating tool according to claim 2, characterized in that the transmission mechanism comprises:

connecting blocks;

a first bearing; the first bearing is arranged at the first end of the connecting block; the first bearing is contacted with the second end of the force arm;

a ratchet wheel force guide fluted disc; the second end of the connecting block is rotatably connected with the ratchet force guide fluted disc; the ratchet force guide fluted disc is also meshed with the ratchet mechanism;

fixing a steering knuckle; the ratchet wheel force guide fluted disc is rotatably arranged in the force arm shell through the fixed steering knuckle.

7. The hydropower station water inlet ball valve overhauling sealing locking ingot screw rod throwing and retreating tool according to claim 2, wherein the ratchet mechanism comprises:

a ratchet housing; the ratchet wheel shell is internally provided with a mounting groove, and the lower end of the ratchet wheel shell is connected with the force arm shell;

a ratchet ring; the ratchet ring is in transmission connection with the transmission mechanism;

a second bearing; one side of the ratchet ring is connected with the outer ring of the second bearing; the inner ring of the second bearing is connected with the ratchet wheel shell;

a ratchet wheel disc; the ratchet wheel disc is arranged in the center of the ratchet wheel ring, and a through sliding opening is axially formed in the center of the ratchet wheel disc; the ratchet sleeve is slidably arranged in the sliding port;

a sleeve spring; the sleeve spring is sleeved on the outer wall of the ratchet sleeve, one end of the sleeve spring is fixedly installed on the outer wall of the ratchet sleeve, and the other end of the sleeve spring is fixedly installed on the side wall of the ratchet shell.

8. The hydropower station water inlet ball valve overhauling sealing locking ingot screw putting-in and putting-out tool as claimed in claim 7, wherein a sleeve scale limiting block is arranged on the ratchet sleeve and is arranged at the opposite side of the ratchet shell provided with the spring; a sleeve scale is arranged along the length direction of the ratchet sleeve.

9. The hydropower station water inlet ball valve overhauling sealing locking ingot screw rod retreating tool according to claim 7, wherein the locking limiting mechanism comprises:

the ratchet wheel locks the spindle blade right;

the left ratchet wheel spindle locking rod; the middle parts of the ratchet left ingot locking rod and the ratchet right ingot locking rod are rotatably arranged in the force arm shell; the first end of the ratchet left ingot locking rod is used for locking the ratchet ring to rotate in a first direction; the first end of the ratchet right ingot locking rod is used for locking the ratchet ring to rotate in a second direction, and the first direction is opposite to the second direction;

a direction key self-locking structure; two ends of the direction key self-locking structure are respectively connected with the second end of the ratchet wheel left ingot locking rod and the second end of the ratchet wheel right ingot locking rod;

a direction switching key; the direction switching groove is formed in the force arm shell, the direction switching key is slidably mounted in the direction switching groove, the handle end of the direction switching key is arranged outside the force arm shell, and the acting end of the direction switching key is connected with the middle of the direction key self-locking structure;

positioning a limiting block; the positioning limiting block is arranged in the force arm shell; when the direction key self-locking structure slides to two working positions, the direction key self-locking structure is matched with the positioning limiting block in a locking mode.

10. The sealed locking ingot screw of power station ball valve maintenance that intakes according to claim 9 throws and moves back instrument, its characterized in that, locks stop gear and still includes:

a first return spring; the first return spring is arranged between the second end of the ratchet left ingot locking rod and the inner wall of the arm of force shell;

a second return spring; the second reset spring is arranged between the second end of the ratchet right ingot locking rod and the inner wall of the force arm shell.

Images