A tool for inspecting and repairing the sealing lock screw of the water inlet ball valve of a hydropower station

Abstract

The present invention discloses a tool for inserting and retracting a locking screw for inspecting and sealing an inlet ball valve of a hydropower station, comprising a pushing mechanism, a ratchet mechanism, a transmission mechanism, and a locking and limiting mechanism; a ratchet sleeve is provided in the ratchet mechanism, and a ratchet sleeve mouth of the ratchet sleeve acts on the locking screw; a pushing direction of the pushing mechanism is perpendicular to a layout direction of the ratchet sleeve; an action end of the pushing mechanism is transmission-connected to a ratchet ring of the ratchet mechanism through a transmission mechanism; and a locking and limiting mechanism is limitedly connected to the ratchet mechanism; the present invention reads data through each scale mark in the application to form a data report, and judges the internal pressure condition of the ball valve inspection seal and the health degree of the inspection seal locking screw through the torque size and screw-in depth during each inspection; the sleeve scale provided on the ratchet sleeve can more intuitively observe the insertion and retraction condition of the locking screw; the arrangement of the force arm housing and the ratchet housing fully surrounds the remaining tools, and it is not easy for the tools to fall off during use.

Description

Technical Field

[0001] The invention relates to the technical field of safety of water inlet ball valves of hydropower stations, in particular to a tool for inserting and withdrawing a sealing lock spindle screw for repairing water inlet ball valves of hydropower stations. Background Art

[0002] The locking screw insertion and retraction tool for the maintenance seal of a hydropower station's inlet ball valve is designed for safety during equipment maintenance. When the turbine unit is shut down, the inlet ball valve is fully closed, and both the working and maintenance seals are engaged. Once the maintenance seals are in place, on-site mechanics manually operate the locking screw to tighten the piston ring, preventing it from disengaging. This ensures the sealing performance of the maintenance seal and the safety of personnel and equipment during maintenance.

[0003] Maintenance seal locking devices are widely used in the hydropower plant industry. They are implemented in all safety measures related to ball valves at hydropower plants. Failure to properly engage and disengage the maintenance seal on the water inlet ball valve during maintenance can cause significant leakage, posing a serious threat to the safety of maintenance personnel. Failure to properly withdraw the maintenance seal can also prevent it from fully withdrawing, damaging it during the valve's opening and closing. Therefore, ensuring the maintenance seal locking screw on the unit's water inlet ball valve is properly engaged and disengaged as required is crucial.

[0004] At present, traditional hydropower stations generally use manual methods to start and stop the operation. The depth recommended by the manual, the depth limited by the limiter, previous experience, etc. are used to comprehensively judge whether the locking screw is in place. Traditional operations have the following problems.

[0005] 1. The maintenance seal lock screw is located around the circumference of the maintenance seal of the water inlet ball valve of the unit. During operation, the operator needs to work at a height. During the operation, multiple tools will be used, which is inconvenient.

[0006] 2. At present, some ball valves have unlimited position devices for sealing and locking screws. The depth of insertion and withdrawal is generally determined by personal experience and feel. Due to the differences in everyone's behavior habits, there may be errors.

[0007] 3. Ball valves are used in humid environments for a long time. Affected by environmental factors, the thread structure of the ball valve locking screw is susceptible to corrosion and mechanical damage. The screw insertion and withdrawal depth may change over time. Traditional methods cannot intuitively compare and analyze this data.

[0008] 4. Some traditional maintenance sealing and locking screws have no protective device. Once the operation is excessive and the screw is ejected under the action of high oil pressure, the operator may be injured.

[0009] Therefore, it is necessary to develop a tool for repairing and sealing the water inlet ball valve of a hydropower station and locking the spindle screw to solve the above problems. Summary of the Invention

[0010] The purpose of the present invention is to design a tool for inserting and withdrawing a sealing lock spindle screw for repairing a water inlet ball valve of a hydropower station in order to solve the above problems.

[0011] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0012] A tool for inserting and withdrawing a sealing lock screw for inspecting and repairing a water inlet ball valve in a hydropower station, comprising:

[0013] promoting institutions;

[0014] Ratchet mechanism; a ratchet sleeve is provided in the ratchet mechanism, and the ratchet sleeve mouth acts on the locking screw; the pushing direction of the pushing mechanism is perpendicular to the layout direction of the ratchet sleeve;

[0015] The driving end of the pushing mechanism is connected to the ratchet ring of the ratchet mechanism through the transmission mechanism;

[0016] A locking and limiting mechanism is used for limiting the rotation of the ratchet mechanism in one direction; the locking and limiting mechanism is connected to the ratchet mechanism in a limiting manner.

[0017] Specifically, the driving agencies include:

[0018] Rotating telescopic structure; the rotating end of the rotating telescopic structure is sleeved on the outer wall of the arm housing;

[0019] Nitrogen gas spring;

[0020] moment arm;

[0021] Lever arm housing; the nitrogen spring and the lever arm are both installed in the lever arm housing; the action end of the rotary telescopic structure is connected to the first end of the nitrogen spring, the second end of the nitrogen spring is connected to the first end of the lever arm, and the second end of the lever arm is connected to the transmission mechanism.

[0022] Furthermore, the rotating telescopic structure includes:

[0023] Moving sleeve; the moving sleeve is installed in the arm housing and placed above the sliding protrusion;

[0024] Main adjustment scale; an internal thread is provided on the inner wall of the main adjustment scale, an external thread is provided on the lever arm housing, and the main adjustment scale thread is sleeved on the lever arm housing; a sliding protrusion is also provided on the inner wall of the main adjustment scale, and correspondingly, a spiral groove is provided on the lever arm housing, and the sliding protrusion can be slidably installed in the spiral groove.

[0025] Furthermore, main adjustment scale main scale lines are provided on the circumference of the main adjustment scale, and auxiliary differential scale lines are provided on the arm housing.

[0026] Furthermore, a plurality of annular limit blocks are provided in the lever arm housing, and the plurality of annular limit blocks are placed between the lever arm and the lever arm housing.

[0027] Specifically, the transmission mechanism includes:

[0028] Connecting blocks;

[0029] A first bearing; the first bearing is mounted on a first end of the connecting block; the first bearing is in contact with a second end of the lever arm;

[0030] The ratchet force guide toothed disc; the second end of the connecting block is rotatably connected to the ratchet force guide toothed disc; the ratchet force guide toothed disc is also engaged with the ratchet mechanism;

[0031] The steering knuckle is fixed; the ratchet guide gear plate is rotatably installed in the lever arm housing through the fixed steering knuckle.

[0032] Specifically, the ratchet mechanism includes:

[0033] Ratchet housing; a mounting groove is provided in the ratchet housing, and the lower end of the ratchet housing is connected to the lever arm housing;

[0034] Ratchet ring; the ratchet ring is transmission-connected to the transmission mechanism;

[0035] The second bearing; one side of the ratchet ring is connected to the outer ring of the second bearing; the inner ring of the second bearing is connected to the ratchet housing;

[0036] The ratchet disc is arranged at the center of the ratchet ring, and a sliding opening is axially provided at the center of the ratchet disc; the ratchet sleeve is slidably installed in the sliding opening;

[0037] Sleeve spring; the sleeve spring is sleeved on the outer wall of the ratchet sleeve, one end of the sleeve spring is fixedly mounted on the outer wall of the ratchet sleeve, and the other end of the sleeve spring is fixedly mounted on the side wall of the ratchet housing.

[0038] Preferably, a sleeve scale limit block is provided on the ratchet sleeve, and the sleeve scale limit block is placed on the opposite side of the ratchet housing to the spring; and a sleeve scale is provided along the length direction of the ratchet sleeve.

[0039] Specifically, the locking and limiting mechanism includes:

[0040] Ratchet right lock spindle bar;

[0041] The left ratchet locking spindle rod; the middle parts of the left ratchet locking spindle rod and the right ratchet locking spindle rod are rotatably mounted in the arm housing; the first end of the left ratchet locking spindle rod is used to lock the ratchet ring from rotating in a first direction; the first end of the right ratchet locking spindle rod is used to lock the ratchet ring from rotating in a second direction, the first direction and the second direction being opposite;

[0042] Direction key self-locking structure; the two ends of the direction key self-locking structure are respectively connected to the second end of the left locking spindle rod of the ratchet and the second end of the right locking spindle rod of the ratchet;

[0043] Direction switch key; a direction switch slot is provided on the arm housing, the direction switch key is slidably installed in the direction switch slot, the handle end of the direction switch key is placed outside the arm housing, and the active end of the direction switch key is connected to the middle of the direction key self-locking structure;

[0044] Positioning limit block; the positioning limit block is installed in the arm housing; when the direction key self-locking structure slides to two working positions, it is locked with the positioning limit block.

[0045] Preferably, the locking and limiting mechanism further comprises:

[0046] A first return spring; the first return spring is arranged between the second end of the left lock spindle rod of the ratchet and the inner wall of the lever arm housing;

[0047] The second return spring is arranged between the second end of the right locking spindle rod of the ratchet and the inner wall of the force arm housing.

[0048] The beneficial effects of the present invention are:

[0049] The data can be read through the scale lines in this application to form a data report. The internal pressure of the ball valve inspection seal and the health of the inspection seal lock screw can be judged by the torque size and screw-in depth during each inspection.

[0050] The sleeve scale set on the ratchet sleeve can know the depth of the locking screw in real time, and observe the locking screw's insertion and withdrawal more intuitively;

[0051] The nitrogen spring has a more stable elastic coefficient than ordinary springs and is not affected by environmental factors such as moisture in the ball valve layer;

[0052] Due to the arrangement of the lever arm housing and the ratchet housing, the remaining tools are fully surrounded, and it is not easy for the tools to fall off during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is the main view of the application Figure 1 ;

[0054] Figure 2 yes Figure 1 A magnified diagram of some structures in Figure 1 ;

[0055] Figure 3 yes Figure 1 A magnified diagram of some structures in Figure 2 ;

[0056] Figure 4 This is the main view of the application Figure 2 ;

[0057] Figure 5 yes Figure 4 A partial enlarged schematic diagram of the structure;

[0058] Figure 6 is a side cross-sectional view of the present application;

[0059] Figure 7 yes Figure 6 A partial enlarged schematic diagram of the structure;

[0060] Figure 8 This is a schematic diagram of the coordination structure between the main adjustment scale and the movable sleeve in this application;

[0061] Figure 9 It is a partial structural diagram of the ratchet mechanism in this application;

[0062] In the figure: 1. Handle; 2. Connecting buckle; 3. Main adjustment scale; 4. Main scale line of main adjustment scale; 5. Secondary differential scale line; 6. Nitrogen spring; 7. Lever; 8. Lever housing; 9. Annular limit block; 10. Connecting block; 11. Direction switching key; 12. Ratchet right locking spindle rod; 13. Ratchet left locking spindle rod; 14. Direction key self-locking structure; 15. Ratchet housing; 16. Ratchet ring; 17. Second bearing; 18. Ratchet sleeve; 19. Ratchet sleeve mouth; 20. Ratchet disc; 21. Fixed steering knuckle; 22. Ratchet force guide gear disc; 23. First bearing; 24. Sleeve spring; 25. Sleeve scale; 26. Sleeve scale limit block; 29. Positioning limit block; 30. First return spring; 31. Second return spring; 32. Moving sleeve. DETAILED DESCRIPTION

[0063] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present invention. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0064] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0065] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0066] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0067] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0068] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also mean internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0069] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0070] like Figure 1 、 4 6, a tool for inserting and withdrawing a sealing lock screw for inspecting and repairing a water inlet ball valve of a hydropower station, comprising:

[0071] promoting institutions;

[0072] Ratchet mechanism; a ratchet sleeve 18 is provided in the ratchet mechanism, and a ratchet sleeve opening 19 of the ratchet sleeve 18 acts on the locking screw; the pushing direction of the pushing mechanism is perpendicular to the layout direction of the ratchet sleeve 18;

[0073] The driving end of the driving mechanism is connected to the ratchet ring 16 of the ratchet mechanism through the transmission mechanism;

[0074] A locking and limiting mechanism is used for limiting the rotation of the ratchet mechanism in one direction; the locking and limiting mechanism is connected to the ratchet mechanism in a limiting manner.

[0075] like Figure 1 、 3 As shown, the driving agencies include:

[0076] Rotating telescopic structure; the rotating end of the rotating telescopic structure is mounted on the outer wall of the arm housing 8;

[0077] Nitrogen spring 6;

[0078] Lever 7;

[0079] Lever housing 8; the nitrogen spring 6 and the lever arm 7 are both installed in the lever arm housing 8; the active end of the rotary telescopic structure is connected to the first end of the nitrogen spring 6, the second end of the nitrogen spring 6 is connected to the first end of the lever arm 7, and the second end of the lever arm 7 is connected to the transmission mechanism.

[0080] like Figure 3 、 8 As shown, the rotating telescopic structure includes:

[0081] The movable sleeve 32 is mounted in the lever housing 8 and is placed above the sliding protrusion;

[0082] Main adjustment scale 3; an internal thread is provided on the inner wall of the main adjustment scale 3, and an external thread is provided on the lever arm housing 8, and the main adjustment scale 3 is threadedly mounted on the lever arm housing 8; a sliding protrusion is also provided on the inner wall of the main adjustment scale 3, and correspondingly, a spiral groove is provided on the lever arm housing 8, and the sliding protrusion can be slidably installed in the spiral groove.

[0083] like Figure 3 As shown, main adjustment scale main graduations 4 are provided around the circumference of the main adjustment scale 3, and auxiliary differential graduations 5 are provided on the lever arm housing 8. The main adjustment scale main graduations 4 are used to identify the magnitude of the torque; the auxiliary differential graduations 5 are used in conjunction with the main adjustment scale main graduations 4 to determine the torque of the lever arm 7. The reading method here is the same as that of the micrometer screw and will not be elaborated here.

[0084] like Figure 1 As shown, two annular limit blocks 9 are provided in the lever arm housing 8, and the two annular limit blocks 9 are placed between the lever arm 7 and the lever arm housing 8. The two annular limit blocks 9 are used to limit the radial swing of the lever arm 7 and play an axial guiding role.

[0085] like Figure 4 、 5 As shown, the transmission mechanism includes:

[0086] Connecting block 10;

[0087] The first bearing 23 is mounted on the first end of the connecting block 10; the first bearing 23 is in contact with the second end of the lever arm 7;

[0088] The ratchet force guide toothed disc 22; the second end of the connecting block 10 is rotatably connected to the ratchet force guide toothed disc 22; the ratchet force guide toothed disc 22 is also engaged with the ratchet mechanism;

[0089] The ratchet guide gear plate 22 is rotatably mounted in the lever arm housing 8 through the fixed steering knuckle 21.

[0090] like Figure 1 、 2 As shown in , 6, 7, and 9, the ratchet mechanism includes:

[0091] The ratchet housing 15; a mounting groove is provided in the ratchet housing 15, and the lower end of the ratchet housing 15 is connected to the arm housing 8;

[0092] The ratchet ring 16 is connected to the transmission mechanism;

[0093] The second bearing 17; one side of the ratchet ring 16 is connected to the outer ring of the second bearing 17; the inner ring of the second bearing 17 is connected to the ratchet housing 15;

[0094] The ratchet disc 20 is provided at the center of the ratchet ring 16, and a sliding opening is provided axially through the center of the ratchet disc 20; the ratchet sleeve 18 is slidably mounted in the sliding opening;

[0095] Sleeve spring 24; the sleeve spring 24 is mounted on the outer wall of the ratchet sleeve 18, one end of the sleeve spring 24 is fixedly mounted on the outer wall of the ratchet sleeve 18, and the other end of the sleeve spring 24 is fixedly mounted on the side wall of the ratchet housing 15.

[0096] like Figure 7 As shown, a sleeve scale limit block 26 is provided on the ratchet sleeve 18 , and the sleeve scale limit block 26 is placed on the opposite side of the ratchet housing 15 where the spring is provided; a sleeve scale 25 is provided along the length direction of the ratchet sleeve 18 .

[0097] like Figure 1 、 2 As shown, the locking and limiting mechanism includes:

[0098] Ratchet right lock spindle rod 12;

[0099] The left ratchet locking spindle rod 13; the middle portions of the left ratchet locking spindle rod 13 and the right ratchet locking spindle rod 12 are rotatably mounted in the lever arm housing 8; the first end of the left ratchet locking spindle rod 13 is used to lock the ratchet ring 16 from rotating in a first direction; the first end of the right ratchet locking spindle rod 12 is used to lock the ratchet ring 16 from rotating in a second direction, the first direction and the second direction being opposite;

[0100] Direction key self-locking structure 14; both ends of the direction key self-locking structure 14 are respectively connected to the second end of the ratchet left lock spindle rod 13 and the second end of the ratchet right lock spindle rod 12;

[0101] Direction switch key 11; a direction switch slot is provided on the arm housing 8, the direction switch key 11 is slidably mounted in the direction switch slot, the handle end of the direction switch key 11 is placed outside the arm housing 8, and the active end of the direction switch key 11 is connected to the middle portion of the direction key self-locking structure 14;

[0102] Positioning stop block 29; Positioning stop block 29 is installed in the arm housing 8; when the direction key self-locking structure 14 slides to the two working positions, it locks with the positioning stop block 29. The positioning stop block 29 is provided with two positioning holes, and correspondingly, the direction key self-locking structure is provided with a positioning block. When the direction key self-locking structure 14 slides to the working position, the positioning block is inserted into the positioning hole for positioning. In addition, the positioning hole can be a circular arc structure, which can facilitate the positioning block to slide out when the direction switch key 11 is pushed.

[0103] like Figure 2 As shown, the locking and limiting mechanism also includes:

[0104] The first return spring 30 is provided between the second end of the left locking rod 13 of the ratchet and the inner wall of the arm housing 8;

[0105] The second return spring 31 is arranged between the second end of the ratchet right lock spindle rod 12 and the inner wall of the force arm housing 8.

[0106] The present application also includes a handle 1, which is connected to the lower end of the lever arm housing 8; in addition, a connecting buckle 2 is provided on the handle 1, and the connecting buckle 2 includes a third return spring and a card block. The handle 1 is radially provided with a sliding groove, and the first end of the third return spring is connected to the bottom of the sliding groove, and the second end of the third return spring is connected to the card block. When not in use, the card block partially protrudes out of the lever arm housing 8. When in use, the card block is pressed by hand, and the third return spring is compressed, and the card block retracts into the sliding groove. At this time, an extended handle with a safety control hole can be inserted to increase the length of the handle 1.

[0107] Working principle:

[0108] When the main adjustment scale 3 rotates, the main adjustment scale 3 rises or falls, and the sliding protrusion on the inner wall of the main adjustment scale 3 lifts or lowers the movable sleeve 32, and the movable sleeve 32 acts upward on the nitrogen spring 6, and the nitrogen spring 6 acts upward on the force arm 7. The upper end of the force arm 7 pushes the connecting block 10 upward, and the upper end of the connecting block 10 pushes the ratchet force guide tooth plate 22. The ratchet force guide tooth plate 22 rotates around the fixed steering knuckle 21. Because the ratchet force guide tooth plate 22 is engaged with the outer teeth of the ratchet ring 16, it pushes the ratchet ring 16 to rotate in one direction. Finally, the rotation of the ratchet ring 16 drives the ratchet sleeve 18 installed therein to rotate, thereby realizing the operation of screwing the locking spindle screw in and out.

[0109] When a torque is applied to the locking screw, and the torque value does not exceed the set range, the locking screw can be continuously rotated in and out by the tool under the action of the lever. When the torque required to rotate the locking screw exceeds the set torque, the nitrogen spring 6 cannot withstand the force transmitted through the lever principle, and the nitrogen spring 6 sinks, reducing the engagement force between the ratchet guide tooth plate 22 and the ratchet, and ultimately causing the two to slip. The torque at this time can be converted using the torque formula.

[0110] When the sleeve scale limit block 26 contacts the left side of the ratchet housing 15, the data of the sleeve scale 25 is observed to be 0. When the device is pressed to the right, the ratchet sleeve 18 moves to the left and the data of the sleeve scale 25 increases. By observing the data of the sleeve scale 25, the ratchet sleeve 18 can observe in real time the depth of the locking screw at this time.

[0111] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A tool for inspecting and repairing the sealing lock ingot screw of the water inlet ball valve of a hydropower station, characterized in that: include: promoting institutions; Ratchet mechanism; a ratchet sleeve is provided in the ratchet mechanism, and the ratchet sleeve mouth acts on the locking screw; the pushing direction of the pushing mechanism is perpendicular to the layout direction of the ratchet sleeve; The driving end of the pushing mechanism is connected to the ratchet ring of the ratchet mechanism through the transmission mechanism; A locking and limiting mechanism for limiting the rotation of the ratchet mechanism in one direction; the locking and limiting mechanism is connected to the ratchet mechanism in a limiting manner; The driving agencies include: Rotating telescopic structure; the rotating end of the rotating telescopic structure is sleeved on the outer wall of the arm housing; Nitrogen gas spring; moment arm; The lever housing; the nitrogen spring and the lever arm are both installed in the lever housing; the active end of the rotating telescopic structure is connected to the first end of the nitrogen spring, the second end of the nitrogen spring is connected to the first end of the lever arm, and the second end of the lever arm is connected to the transmission mechanism; The rotating telescopic structure includes: Moving sleeve; the moving sleeve is installed in the arm housing and placed above the sliding protrusion; Main adjustment scale; an internal thread is provided on the inner wall of the main adjustment scale, an external thread is provided on the arm housing, and the main adjustment scale thread is sleeved on the arm housing; a sliding protrusion is also provided on the inner wall of the main adjustment scale, and correspondingly, a spiral groove is provided on the arm housing, and the sliding protrusion can be slidably installed in the spiral groove; A plurality of annular limiting blocks are arranged in the lever arm housing, and the plurality of annular limiting blocks are placed between the lever arm and the lever arm housing.

2. A tool for repairing and sealing the water inlet ball valve of a hydropower station according to claim 1, characterized in that: Main adjustment scale main scale lines are arranged on the circumference of the main adjustment scale, and auxiliary differential scale lines are arranged on the arm housing.

3. A tool for inserting and withdrawing the sealing lock spindle screw for repairing the water inlet ball valve of a hydropower station according to claim 1, characterized in that: The transmission mechanism includes: Connecting blocks; A first bearing; the first bearing is mounted on a first end of the connecting block; the first bearing is in contact with a second end of the lever arm; The ratchet force guide toothed disc; the second end of the connecting block is rotatably connected to the ratchet force guide toothed disc; the ratchet force guide toothed disc is also engaged with the ratchet mechanism; The steering knuckle is fixed; the ratchet guide gear plate is rotatably installed in the lever arm housing through the fixed steering knuckle.

4. A tool for inserting and withdrawing the sealing lock spindle screw for repairing the water inlet ball valve of a hydropower station according to claim 1, characterized in that: The ratchet mechanism includes: Ratchet housing; a mounting groove is provided in the ratchet housing, and the lower end of the ratchet housing is connected to the lever arm housing; Ratchet ring; the ratchet ring is connected to the transmission mechanism; The second bearing; one side of the ratchet ring is connected to the outer ring of the second bearing; the inner ring of the second bearing is connected to the ratchet housing; The ratchet disc is arranged at the center of the ratchet ring, and a sliding opening is axially provided at the center of the ratchet disc; the ratchet sleeve is slidably installed in the sliding opening; Sleeve spring; the sleeve spring is sleeved on the outer wall of the ratchet sleeve, one end of the sleeve spring is fixedly mounted on the outer wall of the ratchet sleeve, and the other end of the sleeve spring is fixedly mounted on the side wall of the ratchet housing.

5. A tool for inserting and withdrawing the sealing lock spindle screw for repairing the water inlet ball valve of a hydropower station according to claim 4, characterized in that: A sleeve scale limit block is provided on the ratchet sleeve, and the sleeve scale limit block is placed on the opposite side of the spring provided on the ratchet housing; a sleeve scale is provided along the length direction of the ratchet sleeve.

6. A tool for inserting and withdrawing a sealing lock spindle screw for inspecting and repairing a water inlet ball valve of a hydropower station according to claim 4, characterized in that: The locking limit mechanism includes: Ratchet right lock spindle bar; The left ratchet locking spindle rod; the middle parts of the left ratchet locking spindle rod and the right ratchet locking spindle rod are rotatably mounted in the arm housing; the first end of the left ratchet locking spindle rod is used to lock the ratchet ring from rotating in a first direction; the first end of the right ratchet locking spindle rod is used to lock the ratchet ring from rotating in a second direction, the first direction and the second direction being opposite; Direction key self-locking structure; the two ends of the direction key self-locking structure are respectively connected to the second end of the left locking spindle rod of the ratchet and the second end of the right locking spindle rod of the ratchet; Direction switch key; a direction switch slot is provided on the arm housing, the direction switch key is slidably installed in the direction switch slot, the handle end of the direction switch key is placed outside the arm housing, and the active end of the direction switch key is connected to the middle of the direction key self-locking structure; Positioning limit block; the positioning limit block is installed in the arm housing; when the direction key self-locking structure slides to two working positions, it is locked with the positioning limit block.

7. A tool for inserting and withdrawing the sealing lock spindle screw for repairing the water inlet ball valve of a hydropower station according to claim 6, characterized in that: The locking limit mechanism also includes: A first return spring; the first return spring is arranged between the second end of the left lock spindle rod of the ratchet and the inner wall of the lever arm housing; The second return spring is arranged between the second end of the right locking spindle rod of the ratchet and the inner wall of the force arm housing.

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