A valve wrench

Abstract

The application relates to the field of semiconductor production part manufacturing, and discloses a valve wrench, which comprises a valve side provided with a threaded hole for mounting a bolt, and a hexagonal hole is formed in the bolt; a vertical displacement adjusting mechanism and a horizontal displacement adjusting mechanism matched with the vertical displacement adjusting mechanism are arranged in a handle body, the horizontal displacement adjusting mechanism is driven by the vertical displacement adjusting mechanism to move left and right, and a guide block is arranged at the tail end of the vertical displacement adjusting mechanism; a limiting mechanism is connected with the horizontal displacement mechanism, the limiting mechanism is driven by the horizontal displacement mechanism to act on a ratchet mechanism arranged on the left side of the horizontal displacement mechanism to release or limit the ratchet mechanism; a wrench head matched with the hexagonal hole is arranged at the front end of the ratchet mechanism; the guide block is attached to a plane through external force, the wrench head is inserted into the hexagonal hole, the vertical displacement adjusting mechanism and the horizontal displacement adjusting mechanism are driven to act, the limiting mechanism releases the ratchet mechanism, the handle body is rotated to drive the ratchet mechanism and the wrench head to rotate, and the bolt is tightened.

Description

Technical Field

[0001] This invention relates to the field of semiconductor manufacturing technology, and in particular to a valve wrench. Background Technology

[0002] Semiconductor-grade valves have high requirements for materials, precision, and surface roughness. The bolts in rotating semiconductor-grade valves need to be aligned precisely; otherwise, threaded connections between the bolts and nuts may fail, leading to thread wear and failure over time.

[0003] Furthermore, when installing the handle bolt, the valve body handle must first be fitted onto the valve stem, and then the bolt must be screwed into the handle to secure it. If the installer screws in the bolt beforehand and then fits the handle onto the valve stem, it will damage the valve stem, thus affecting the overall surface roughness, particulate matter, service life, and accuracy of the semiconductor-grade valve.

[0004] To avoid the aforementioned problem of screwing in the valve first and then fitting it in, there is an urgent need for a valve wrench that can prevent this operational sequence. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide a valve wrench that avoids the operational error of screwing in before fitting it in. Simultaneously, it effectively ensures that the bolt can only be screwed in after it has been fitted in.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a valve wrench, comprising: a valve, the side of which has a threaded hole for installing a bolt, and the bolt having an internal hexagonal hole; a handle body, which has a vertical displacement adjustment mechanism and a horizontal displacement adjustment mechanism that cooperate with the vertical displacement adjustment mechanism, so that the vertical displacement adjustment mechanism drives the horizontal displacement adjustment mechanism to move horizontally left and right, and the end of the vertical displacement adjustment mechanism is provided with a guide block; a limiting mechanism connected to the horizontal displacement adjustment mechanism, which drives the limiting mechanism to act, so as to release or limit the ratchet mechanism located on the left side of the horizontal displacement adjustment mechanism; the front end of the ratchet mechanism is provided with a wrench head that cooperates with the internal hexagonal hole; by applying external force to bring the guide block into contact with the plane, the vertical displacement adjustment mechanism and the horizontal displacement adjustment mechanism are driven to act, and then the limiting mechanism releases the ratchet mechanism. After the wrench head is inserted into the internal hexagonal hole, the handle body is rotated to drive the ratchet mechanism and the wrench head to rotate, so as to tighten the bolt.

[0007] Furthermore, the handle body has an internal channel for the vertical displacement adjustment mechanism to move up and down; the bottom of the handle body has a housing that communicates with the channel, which is used to house the horizontal displacement adjustment mechanism, the limiting mechanism and the ratchet mechanism. A first spring is provided at the upper part of the channel. The first end of the first spring is connected to the inner end face of the handle plug at the upper end of the handle body. The second end of the first spring is connected to the vertical displacement adjustment mechanism through a ring.

[0008] Furthermore, an annular groove is provided inside the housing, and a first cover plate and a second cover plate are respectively provided at both ends of the annular groove. A partition is provided between the first cover plate and the second cover plate to divide the internal space of the annular groove into two parts. The first part of the space near the first cover plate is used to accommodate the lateral displacement adjustment mechanism and the limiting mechanism, and the second part of the space near the second cover plate is used to accommodate the ratchet mechanism.

[0009] Furthermore, a guide hole is provided in the middle of the first cover plate so that one end of the lateral displacement adjustment mechanism can pass through the guide hole and contact the vertical displacement adjustment mechanism. The second cover plate has a first through hole in the middle so that the wrench head at the front end of the ratchet mechanism can extend out of the second cover plate. The bottom of the partition has a second through hole for installing a limiting mechanism.

[0010] Furthermore, the vertical displacement adjustment mechanism includes a guide rail and a guide block integrally formed therewith and disposed at the bottom of the guide rail; The side of the guide rail is provided with a trapezoidal protrusion, which divides the rail into a first section, a second section and a third section. A stop is provided at the bottom of the third section to limit the lateral displacement adjustment mechanism. The first section can move up and down within the channel of the handle body, and the top of the first section is connected to the second end of the first spring through a ring.

[0011] Furthermore, the guide block can be a semi-circular guide block or a fully circular guide block.

[0012] Furthermore, the lateral displacement adjustment mechanism includes a ratchet shaft, a roller, a sleeve, and a second spring; The end of the ratchet shaft in the ratchet mechanism passes through the partition and is located in the first part of the space near the first cover plate. The sleeve is sleeved on the ratchet shaft, and the right end of the sleeve passes through the first cover plate. A roller is connected to the right end of the sleeve through a bearing. The roller moves up and down along the guide rail in the vertical displacement adjustment mechanism. A second spring is fitted on the outer side of the left end of the sleeve, so that the roller at the right end of the sleeve is pushed onto the guide rail by the elastic force of the second spring; the middle section of the sleeve is set as a trapezoidal platform structure, and one end of the limiting mechanism is hinged to the trapezoidal platform structure, so that the limiting mechanism is driven to work by the left and right movement of the sleeve.

[0013] Furthermore, the ratchet mechanism includes a ratchet gear, a pawl, a pawl shaft, and a third spring; The right side of the ratchet is integrally formed with the ratchet shaft, and the left end of the ratchet is provided with a wrench head; the middle part of the pawl that cooperates with the ratchet is set on the partition through the pawl shaft. The first end of the pawl is connected to one end of the third spring, and the other end of the third spring is set on the annular groove; The second end of the pawl cooperates with the limiting mechanism, which limits or releases the second end of the pawl.

[0014] Furthermore, the limiting mechanism includes a first link and a second link; the first end of the first link is hinged to the trapezoidal platform structure of the sleeve in the lateral displacement adjusting mechanism, the second end of the first link is hinged to the first end of the second link, and the second end of the second link passes through the second through hole on the partition and contacts the second end of the annular groove and the pawl to limit or release the pawl; the middle part of the second link is hinged to the partition.

[0015] Furthermore, the second link adopts a V-shaped structure, and the included angle of the V-shape is greater than 90°.

[0016] The present invention has the following advantages due to the adoption of the above technical solutions: This invention, through the cooperation of a vertical displacement adjustment mechanism and a horizontal displacement adjustment mechanism, and with the mutual cooperation of a limiting mechanism and a ratchet mechanism with the vertical and horizontal displacement adjustment mechanisms, effectively ensures that the valve and the bottom of the vertical displacement adjustment mechanism are on the same plane only when the valve handle is fitted onto the valve stem. By pressing down with external force, the wrench head is aligned with the bolt hole on the valve handle, avoiding the misoperation of screwing in first and then fitting in, and preventing damage to the valve stem. Attached Figure Description

[0017] Figure 1 This is a front view of the valve wrench in the first posture of an embodiment of the present invention; Figure 2 This is a cross-sectional perspective view of the valve wrench in the first position according to an embodiment of the present invention; Figure 3 This is a cross-sectional perspective view of the valve wrench in the second pose of an embodiment of the present invention; Figure 4 This is a left sectional view of the valve wrench in the second posture of an embodiment of the present invention; Figure 5 yes Figure 3 A magnified view of a portion of the image; Figure 6 yes Figure 4 A magnified view of a portion of the image; Figure label: 100 - Valve; 101 - Bolt; 110 - Socket hexagonal hole; 210-Handle plug; 220-Handle body; 221-Channel; 222-First spring; 230-Guide block; 231-Guide rail; 232-Ring; 233-Trapezoidal protrusion; 241-First section; 242-Second section; 243-Third section; 244-Stop block; 310-Hexagonal wrench head; 311-Ratchet; 312-Ratchet shaft; 320-Roller; 321-Sleeve; 322-Second spring; 331-First connecting rod; 332-Second connecting rod; 341-First cover plate; 3411-Guide hole; 342-Annular groove; 343-Second cover plate; 3431-First through hole; 344-Second through hole; 345-Baffle; 351-Pawl; 352-Third spring; 353-Pawl shaft. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] In one embodiment of the present invention, a valve wrench is provided. In this embodiment, as... Figures 1 to 6 As shown, the valve wrench includes: The valve 100 has a threaded hole on its side for mounting a bolt 101, and the bolt 101 has an internal hexagonal hole 110. The handle body 220 is provided with a vertical displacement adjustment mechanism and a horizontal displacement adjustment mechanism that cooperates with the vertical displacement adjustment mechanism, so that the vertical displacement adjustment mechanism drives the horizontal displacement adjustment mechanism to move horizontally left and right; wherein, the end of the vertical displacement adjustment mechanism is provided with a guide block 230. The limiting mechanism is connected to the lateral displacement adjustment mechanism. The lateral displacement adjustment mechanism drives the limiting mechanism to release or limit the ratchet mechanism located on the left side of the lateral displacement adjustment mechanism. The front end of the ratchet mechanism is provided with a wrench head 310 that mates with the internal hexagonal socket 110; External force is used to bring the guide block 230 into contact with the plane, which drives the vertical displacement adjustment mechanism and the horizontal displacement adjustment mechanism to move. Then, the ratchet mechanism is released by the limit mechanism. After the wrench head 310 is inserted into the internal hexagonal hole 110, the ratchet mechanism and the wrench head 310 are rotated by the rotation of the handle body 220 to tighten the bolt 101. By bringing the guide block 230 into contact with the plane, the operation error of screwing in first and then putting it on is effectively avoided, ensuring that the bolt can only be screwed in after it has been put on.

[0021] In one optional embodiment, the handle body 220 has a channel 221 inside for the vertical movement of the vertical displacement adjustment mechanism, and a first spring 222 is disposed in the upper part of the channel 221; the bottom of the handle body 220 has a housing communicating with the channel 221 for accommodating the horizontal displacement adjustment mechanism, the limiting mechanism, and the ratchet mechanism. The first end of the first spring 222 is connected to the inner end face of the handle plug 210 disposed at the upper end of the handle body 220, and the second end of the first spring 222 is connected to the vertical displacement adjustment mechanism through a ring 232.

[0022] In this embodiment, an annular groove 342 is provided inside the housing. A first cover plate 341 and a second cover plate 343 are respectively provided at both ends of the annular groove 342. A partition plate 345 is provided between the first cover plate 341 and the second cover plate 343, dividing the internal space of the annular groove 342 into two parts. The first part of the space near the first cover plate 341 is used to accommodate the lateral displacement adjustment mechanism and the limiting mechanism, and the second part of the space near the second cover plate 343 is used to accommodate the ratchet mechanism.

[0023] A guide hole 3411 is provided in the middle of the first cover plate 341, so that one end of the lateral displacement adjustment mechanism can pass through the guide hole 3411 and contact the vertical displacement adjustment mechanism. A first through hole 3431 is provided in the middle of the second cover plate 343, so that the wrench head 310 of the ratchet mechanism can extend out of the second cover plate 343 and be located outside the second cover plate 343. A second through hole 344 is provided at the bottom of the partition plate 345 for installing the limiting mechanism.

[0024] The wrench head 310 is a hexagonal wrench head, which is matched with the internal hexagonal hole 110 on the valve 100.

[0025] In one optional embodiment, the vertical displacement adjustment mechanism includes a guide rail 231 and a guide block 230 integrally formed therewith and disposed at the bottom of the guide rail 231. A trapezoidal protrusion 233 is provided on the side of the guide rail 231, which divides the rail into a first segment 241, a second segment 242 and a third segment 243. A stop block 244 is provided at the bottom of the third segment 243 to limit the lateral displacement adjustment mechanism. The first segment 241 can move up and down within the channel 221 of the handle body 220, and the top of the first segment 241 is connected to the second end of the first spring 222 through a ring 232.

[0026] In this embodiment, the guide block 230 can be a semi-circular guide block or a full-circular guide block to guide the wrench head 310 and the internal hexagonal hole 110 when they rotate, thereby ensuring that the wrench head 310 and the internal hexagonal hole 110 on the valve handle remain aligned under pressure and to avoid wear.

[0027] In use, the valve 100 is placed on a plane and the semi-circular guide block 230 is placed on the plane. The semi-circular guide block 230 is pressed down by external force, and then the vertical displacement adjustment mechanism of the semi-circular guide block 230 is activated.

[0028] In an optional embodiment, the lateral displacement adjustment mechanism includes a ratchet shaft 312, a roller 320, a sleeve 321, and a second spring 322. The end of the ratchet shaft 312 in the ratchet mechanism passes through the partition 345 and is located in a first portion of the space near the first cover plate 341. The sleeve 321 is fitted onto the ratchet shaft 312, and the right end of the sleeve 321 passes through the first cover plate 341. The right end of the sleeve 321 is connected to the roller 320 via a bearing. The roller 320 can move up and down along the guide rail 231 in the vertical displacement adjustment mechanism, thereby converting the up-and-down movement into a left-and-right movement. A second spring 322 is fitted on the outer side of the left end of the sleeve 321, so that the roller 320 at the right end of the sleeve 321 is pushed onto the guide rail 231 by the elastic force of the second spring 322; the middle section of the sleeve 321 is set as a trapezoidal platform structure, and one end of the limiting mechanism is hinged to the trapezoidal platform structure, so that the limiting mechanism can be driven to work by the left and right movement of the sleeve 321.

[0029] In use, when the roller 320 moves downward along the guide rail 231, the roller 320 moves sequentially from the first section 241 of the guide rail 231 to the second section 242 and the third section 243. When it moves to the third section 243, the roller 320 is compressed by the third section 243 and moves to the left. At this time, the roller 320 drives the sleeve 321 to move to the left, compressing the second spring 322. The sleeve 321 drives the limiting mechanism to release the ratchet mechanism, so that the ratchet mechanism functions normally and the rotation of the handle can drive the wrench head 310 to rotate in one direction. When the roller 320 moves upward along the guide rail 231, it moves sequentially from the third section 243 of the guide rail 231 to the second section 242 and the first section 241. When it moves to the first section 241, the second spring 322 releases its elastic force, pushing the sleeve 321 to the right, which in turn drives the roller 320 to move to the right, so that the roller 320 keeps sliding along the guide rail 231. At this time, the sleeve 321 drives the limiting mechanism to limit the ratchet mechanism, so that the ratchet mechanism lacks a limit and no matter how the handle is turned, the wrench head 310 cannot be rotated.

[0030] In one optional embodiment, the ratchet mechanism includes a ratchet gear 311, a pawl 351, a pawl shaft 353, and a third spring 352. The right side of the ratchet gear 311 is integrally formed with the ratchet shaft 312, and a wrench head 310 is provided on the left end face of the ratchet gear 311. The pawl 351, which cooperates with the ratchet gear 311, is mounted on a partition 345 via the pawl shaft 353. The first end of the pawl 351 is connected to one end of the third spring 352, and the other end of the third spring 352 is provided on an annular groove 342. The second end of the pawl 351 cooperates with a limiting mechanism, which limits or releases the second end of the pawl 351. When the second end of the pawl 351 is limited by the limiting mechanism, the first end of the pawl 351 is disengaged from the ratchet gear 311, the ratchet mechanism does not work, and at this time the third spring 352 is compressed by the first end of the pawl 351; when the second end of the pawl 351 is released by the limiting mechanism, the first end of the pawl 351 is pressed into the ratchet gear 311 by the elastic force of the third spring 352, so that the first end of the pawl 351 and the ratchet gear 311 are engaged, and the ratchet mechanism works.

[0031] In this embodiment, the ratchet 351 is preferably set to three, evenly distributed around the circumference of the ratchet 311; and the number of the third spring 352 and the number of the limiting mechanism are set in a corresponding manner to the number of ratchet 351.

[0032] In an optional embodiment, the limiting mechanism includes a first link 331 and a second link 332. The first end of the first link 331 is hinged to the trapezoidal platform structure of the sleeve 321 in the lateral displacement adjusting mechanism. The second end of the first link 331 is hinged to the first end of the second link 332. The second end of the second link 332 passes through the second through hole 344 on the partition 345 and contacts the annular groove 342 and the second end of the pawl 351 to limit or release the pawl 351. The middle part of the second link 332 is hinged to the partition 345.

[0033] The second link 332 adopts a V-shaped structure, and the included angle of the V-shape is greater than 90°.

[0034] like Figure 5 , Figure 6 As shown, when used to limit the pawl 351, the roller 320 moves to the first section 241 of the guide rail 231, the sleeve 321 moves to the right, driving the first link 331 to move to the right, and then the first link 331 drives the second link 332 to move to the left, that is, the second link 332 retracts inward. At this time, the second end of the second link 332 locks the pawl 351, thus achieving the limit. When releasing the pawl 351, the roller 320 moves to the third section 243 of the guide rail 231, the sleeve 321 moves to the left, driving the first link 331 to move to the left, and then the first link 331 drives the second link 332 to move to the right, that is, the second link 332 expands outward. At this time, the second link 332 releases the pawl 351.

[0035] In summary, as Figures 1 to 6 As shown, the specific method of using the valve wrench of the present invention includes the following steps: Step 1: First, fit the valve 100 onto the valve stem and place it on a flat surface; Step 2: As Figure 5 As shown, the semi-circular guide block 230 is pressed against the aforementioned plane, and downward pressure is applied through the handle body 220, thereby aligning the hexagonal wrench head 310 of the wrench with the internal hexagonal hole 110 of the bolt 101 on the valve 100. During alignment, the semi-circular guide block 230 of the wrench is compressed, and the roller 320 moves from the first section 241 of the guide rail 231 through the second section 242 to the third section 243. The roller 320 is compressed by the third section 243 and moves to the left, causing the sleeve 321 to move to the left along the guide hole 3411 opened in the first cover plate 341. This causes the first connecting rod 331 of the limiting mechanism to drive the second connecting rod 332 to expand outward. The middle part of the second connecting rod 332 is hinged to the annular groove 342 on the handle body 220. When the second connecting rod 332 expands outward, it can no longer... Figure 6 The pawl 351 is used for limiting (e.g.) Figure 6As shown), when the pawl 351 is released, the ratchet gear 311 can drive the pawl 351, ratchet gear 311, and hex wrench head 310 to rotate through the handle body 220, thereby driving the bolt 101 to rotate; otherwise, no matter how the handle body 220 rotates, the bolt 101 will not rotate, thus ensuring that the bolt 101 can only be tightened after the parts are fitted together, effectively avoiding misoperation and ensuring that the bolt can only be screwed in after the parts are fitted together.

[0036] Step 3: Tighten bolt 101.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve wrench, characterized in that, include: The valve (100) has a threaded hole on its side for mounting a bolt (101), and the bolt (101) has an internal hexagonal hole (110). The handle body (220) is provided with a vertical displacement adjustment mechanism and a horizontal displacement adjustment mechanism that cooperates with the vertical displacement adjustment mechanism, so that the horizontal displacement adjustment mechanism can be driven by the vertical displacement adjustment mechanism to move horizontally left and right. The end of the vertical displacement adjustment mechanism is provided with a guide block (230). The limiting mechanism is connected to the lateral displacement adjustment mechanism. The lateral displacement adjustment mechanism drives the limiting mechanism to release or limit the ratchet mechanism located on the left side of the lateral displacement adjustment mechanism. The front end of the ratchet mechanism is provided with a wrench head (310) that mates with the internal hexagonal hole (110). The guide block (230) is brought into contact with the plane by external force, which drives the vertical displacement adjustment mechanism and the horizontal displacement adjustment mechanism to move. Then the ratchet mechanism is released by the limit mechanism. After the wrench head (310) is inserted into the internal hexagonal hole (110), the ratchet mechanism and the wrench head (310) are rotated by the rotation of the handle body (220) to tighten the bolt (101).

2. The valve wrench as described in claim 1, characterized in that, The handle body (220) has a channel (221) inside for the vertical displacement adjustment mechanism to move up and down; the bottom of the handle body (220) has a housing that communicates with the channel (221) for accommodating the horizontal displacement adjustment mechanism, the limiting mechanism and the ratchet mechanism. A first spring (222) is provided in the upper part of the channel (221). The first end of the first spring (222) is connected to the inner end face of the handle plug (210) provided in the upper part of the handle body (220). The second end of the first spring (222) is connected to the vertical displacement adjustment mechanism through the ring (232).

3. The valve wrench as described in claim 2, characterized in that, An annular groove (342) is provided inside the housing. A first cover plate (341) and a second cover plate (343) are respectively provided at both ends of the annular groove (342). A partition plate (345) is provided between the first cover plate (341) and the second cover plate (343) to divide the internal space of the annular groove (342) into two parts. The first part of the space near the first cover plate (341) is used to accommodate the lateral displacement adjustment mechanism and the limiting mechanism, and the second part of the space near the second cover plate (343) is used to accommodate the ratchet mechanism.

4. The valve wrench as described in claim 3, characterized in that, The first cover plate (341) has a guide hole (3411) in the middle so that one end of the lateral displacement adjustment mechanism can pass through the guide hole (3411) and contact the vertical displacement adjustment mechanism. The second cover plate (343) has a first through hole (3431) in the middle so that the wrench head (310) at the front end of the ratchet mechanism extends out of the second cover plate (343). The bottom of the partition (345) is provided with a second through hole (344) for installing a limiting mechanism.

5. The valve wrench as described in claim 1, characterized in that, The vertical displacement adjustment mechanism includes a guide rail (231) and a guide block (230) integrally formed therewith and disposed at the bottom of the guide rail (231). The guide rail (231) is provided with a trapezoidal protrusion (233) on its side, which divides the rail into a first section (241), a second section (242) and a third section (243). A stop (244) is provided at the bottom of the third section (243) to limit the lateral displacement adjustment mechanism. The first section (241) can move up and down in the channel (221) of the handle body (220), and the top of the first section (241) is connected to the second end of the first spring (222) through a ring (232).

6. The valve wrench as described in claim 5, characterized in that, The guide block (230) is a semi-circular guide block or a full-circular guide block.

7. The valve wrench as described in claim 1, characterized in that, The lateral displacement adjustment mechanism includes a ratchet shaft (312), a roller (320), a sleeve (321), and a second spring (322); The end of the ratchet shaft (312) in the ratchet mechanism passes through the partition (345) and is located in the first part of the space near the first cover plate (341). The sleeve (321) is sleeved on the ratchet shaft (312), and the right end of the sleeve (321) passes through the first cover plate (341). The right end of the sleeve (321) is connected to the roller (320) through the bearing. The roller (320) moves up and down along the guide rail (231) in the vertical displacement adjustment mechanism. A second spring (322) is fitted on the outer side of the left end of the sleeve (321) so that the roller (320) at the right end of the sleeve (321) is pushed onto the guide rail (231) by the elastic force of the second spring (322); the middle section of the sleeve (321) is set as a trapezoidal platform structure, and one end of the limiting mechanism is hinged to the trapezoidal platform structure, so that the limiting mechanism can be driven to work by the left and right movement of the sleeve (321).

8. The valve wrench as described in claim 1, characterized in that, The ratchet mechanism includes a ratchet gear (311), a pawl (351), a pawl shaft (353), and a third spring (352). The right side of the ratchet (311) is integrally formed with the ratchet shaft (312), and the left end face of the ratchet (311) is provided with a wrench head (310); the middle part of the pawl (351) that cooperates with the ratchet (311) is set on the partition (345) through the pawl shaft (353); The first end of the pawl (351) is connected to one end of the third spring (352), and the other end of the third spring (352) is set on the annular groove (342); The second end of the pawl (351) cooperates with the limiting mechanism to limit or release the second end of the pawl (351).

9. The valve wrench as described in claim 1, characterized in that, The limiting mechanism includes a first link (331) and a second link (332); the first end of the first link (331) is hinged to the trapezoidal platform structure of the sleeve (321) in the transverse displacement adjusting mechanism, the second end of the first link (331) is hinged to the first end of the second link (332), the second end of the second link (332) passes through the second through hole (344) on the partition (345) and contacts the second end of the annular groove (342) and the pawl (351) to limit or release the pawl (351); the middle part of the second link (332) is hinged to the partition (345).

10. The valve wrench as described in claim 9, characterized in that, The second link (332) adopts a V-shaped structure, and the included angle of the V-shape is greater than 90°.

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