Torque wrench for replacing nuclear power station valve

Abstract

The utility model relates to the technical field of nuclear power station valves, in particular to a torque wrench for replacing a nuclear power station valve, which comprises a connecting rod, a connecting sleeve arranged at one end of the connecting rod and a middle adjusting component of the connecting sleeve. The ratchet wheel structure is mounted in the connecting rod and is matched with the connecting sleeve; compared with the prior art, by arranging the ratchet wheel structure, when the nut is tightened or loosened, the connecting sleeve can be prevented from being frequently taken down, a certain time can be effectively saved, by arranging the adjusting assembly, the opening and closing plate can be correspondingly adjusted according to different types of nuts, and the operation efficiency is improved. And the wrench can adapt to different working scenes according to different sizes of nut models.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power plant valves, in particular to a torque wrench for replacing nuclear power plant valves. Background Art

[0002] "Power station valves" are also called power station special valves. They are mainly used in pipelines of various systems in thermal power plants to cut off or connect pipeline media. Applicable media: water, steam and other non-corrosive media.

[0003] When tightening a nut with an existing wrench, after rotating it to a certain angle, the entire wrench needs to be removed and put on the nut again to rotate, finally completing the tightening of the nut. Frequently removing the wrench and then putting the wrench on the nut wastes a lot of time, and the existing wrench can only tighten nuts of one size, so further improvement is needed on this basis. Utility Model Content

[0004] The purpose of the utility model is to provide a torque wrench for replacing valves in a nuclear power plant, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A torque wrench for replacing valves in a nuclear power plant, comprising:

[0007] A connecting rod, one end of which is provided with a connecting sleeve, and an adjustment component in the middle of the connecting sleeve, the adjustment component is used to adjust accordingly according to different models of nuts;

[0008] The ratchet structure is installed inside the connecting rod and cooperates with the connecting sleeve to prevent the wrench from being frequently removed from the nut during the tightening process.

[0009] As a further solution of the present invention: the adjustment component includes:

[0010] An adjustment plate rotatably connected to the interior of the connecting sleeve, a plurality of straight notches are provided in the middle of the adjustment plate, and the plurality of straight notches are distributed in a circular array about the adjustment plate, a worm gear is provided on the outer side of the adjustment plate, a regular hexagonal groove is provided in the middle of the connecting sleeve, and a groove is provided on the side of the connecting sleeve away from the connecting rod;

[0011] An adjusting shaft, the adjusting shaft being rotatably connected to the interior of the connecting sleeve, a worm being fixedly connected to the middle portion of the adjusting shaft, and a transmission connection being formed between the worm and the worm wheel;

[0012] The opening and closing plate is located inside the connecting sleeve. Connecting blocks are provided on both sides of the opening and closing plate. The connecting blocks on both sides are respectively slidably matched with the straight notch and the regular hexagonal groove.

[0013] As a further solution of the present invention: the outer diameter of the connecting block is equal to the inner diameter of the straight notch and the regular hexagonal groove.

[0014] As another solution of the present invention: the ratchet structure includes:

[0015] A ratchet wheel is provided in the middle of the connecting rod and on one side of the connecting sleeve;

[0016] A fixing sleeve, the fixing sleeve is fixedly mounted on the connecting sleeve on one side of the ratchet, the middle portion of the fixing sleeve is rotatably connected to the mounting sleeve, and the middle portion of the mounting sleeve is provided with a keyway;

[0017] An adjusting rod, wherein the adjusting rod is located in the middle of the mounting sleeve, a convex groove is provided on the side of the adjusting rod, the convex groove and the key slot are slidably matched, a pawl is provided at one end of the adjusting rod, the pawl and the ratchet cooperate with each other, an elastic member is provided on the outer sleeve of the adjusting rod, the two ends of the elastic member are respectively fixedly connected to the mounting sleeve and the pawl, and one end of the adjusting rod located outside the fixed sleeve is fixedly connected to the transmission gear 2;

[0018] A connecting shaft is rotatably connected to one end of the connecting sleeve, and one end of the connecting shaft is fixedly connected to a transmission gear 1, and the transmission gear 1 and the transmission gear 2 are meshed for transmission.

[0019] As another solution of the present invention: a protective sleeve is provided at one end of the connecting rod away from the connecting sleeve, and the material of the protective sleeve is rubber material.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] Compared with the existing technology, by setting up a ratchet structure, the connecting sleeve can be avoided from being frequently removed when tightening or loosening the nut, which can effectively save a certain amount of time. By setting up an adjustment component, the opening and closing plate can be adjusted accordingly according to the different models of the nut, and the wrench can be adapted to different working scenarios according to the different sizes of the nut models. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is a schematic structural diagram of a torque wrench for replacing valves in nuclear power plants according to the present invention.

[0023] Figure 2 This is a schematic diagram of the first internal structure of the connecting sleeve in the torque wrench for replacing valves in nuclear power plants according to the present invention.

[0024] Figure 3 This is a schematic diagram of the second internal structure of the connecting sleeve in the torque wrench for replacing valves in nuclear power plants according to the present invention.

[0025] Figure 4This utility model is a torque wrench for replacing valves in nuclear power plants Figure 3 Schematic diagram of the locally enlarged structure at point A in the middle.

[0026] Figure 5 This utility model is a torque wrench for replacing valves in nuclear power plants Figure 4 Schematic diagram of the local enlarged structure at point B in the middle.

[0027] Figure 6 This is a structural schematic diagram of the installation sleeve in the torque wrench for replacing valves in nuclear power plants according to the present invention.

[0028] In the figure: 1-connecting rod, 2-connecting sleeve, 201-groove, 3-protective sleeve, 4-adjusting shaft, 5-worm, 6-adjusting plate, 7-worm wheel, 8-straight notch, 9-opening and closing plate, 10-regular hexagonal groove, 11-connecting block, 12-ratchet, 13-connecting shaft, 14-transmission gear 1, 15-fixing sleeve, 16-adjusting rod, 17-elastic member, 18-convex groove, 19-mounting sleeve, 20-transmission gear 2, 21-keyway, 22-pawl. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1-6 This embodiment provides a torque wrench for replacing valves in a nuclear power plant. The torque wrench for replacing valves in a nuclear power plant comprises:

[0031] A connecting rod 1, one end of which is provided with a connecting sleeve 2, and a middle adjustment component of the connecting sleeve 2, the adjustment component being used to adjust accordingly according to different types of nuts;

[0032] A ratchet structure, which is installed inside the connecting rod 1 and cooperates with the connecting sleeve 2 to prevent the wrench from being frequently removed from the nut during tightening;

[0033] Compared with the existing technology, by setting up a ratchet structure, the connecting sleeve 2 can be avoided from being frequently removed when tightening or loosening the nut, which can effectively save a certain amount of time. By setting up an adjustment component, the opening and closing plate 9 can be adjusted accordingly according to the different models of the nut, and the wrench can be adapted to different working scenarios according to the different sizes of the nut models.

[0034] See also Figure 1-Figure 2In one embodiment, the adjustment component comprises:

[0035] An adjustment plate 6 is rotatably connected to the interior of the connecting sleeve 2. A plurality of straight notches 8 are provided in the middle of the adjustment plate 6. The plurality of straight notches 8 are distributed in a circular array about the adjustment plate 6. A worm gear 7 is provided on the outer side of the adjustment plate 6. A regular hexagonal groove 10 is provided in the middle of the connecting sleeve 2. A groove 201 is provided on the side of the connecting sleeve 2 away from the connecting rod 1;

[0036] An adjusting shaft 4 is rotatably connected to the interior of the connecting sleeve 2. A worm 5 is fixedly connected to the middle of the adjusting shaft 4. The worm 5 is transmission-connected to the worm wheel 7.

[0037] The opening and closing plate 9 is located inside the connecting sleeve 2. Connecting blocks 11 are provided on both sides of the opening and closing plate 9. The connecting blocks 11 on both sides slide with the straight notch 8 and the regular hexagonal groove 10 respectively.

[0038] See also Figure 2 In one embodiment, the outer diameter of the connecting block 11 is equal to the inner diameter of the straight slot 8 and the regular hexagonal slot 10, which can prevent the connecting block 11 from shaking during the sliding process.

[0039] When it is necessary to tighten or loosen nuts of different sizes, the adjusting shaft 4 inside the connecting sleeve 2 is controlled to rotate, and the adjusting shaft 4 then drives the worm 5 to rotate. Due to the transmission connection between the worm 5 and the worm wheel 7, the adjusting plate 6 can be further driven to rotate. By rotating the adjusting plate 6, the connecting blocks 11 on both sides of the opening and closing plate 9 can slide along the straight slot 8 and the regular hexagonal slot 10 respectively, thereby realizing the opening and closing adjustment of the opening and closing plate 9. The opening and closing plate 9 can be adjusted to a state that fits the nut according to the different sizes of the nut, and finally the nuts of different types can be tightened or loosened.

[0040] See also Figure 3-Figure 6 In one embodiment, the ratchet structure comprises:

[0041] A ratchet 12 is provided in the middle of the connecting rod 1 and on one side of the connecting sleeve 2;

[0042] A fixing sleeve 15 is fixedly mounted on the connecting sleeve 2 on one side of the ratchet 12 . The middle portion of the fixing sleeve 15 is rotatably connected to a mounting sleeve 19 . A keyway 21 is provided in the middle portion of the mounting sleeve 19 .

[0043] An adjusting rod 16 is located in the middle of the mounting sleeve 19. A convex groove 18 is provided on the side of the adjusting rod 16. The convex groove 18 slides with the key groove 21. A pawl 22 is provided at one end of the adjusting rod 16. The pawl 22 cooperates with the ratchet 12. An elastic member 17 is provided on the outer sleeve of the adjusting rod 16. The two ends of the elastic member 17 are fixedly connected to the mounting sleeve 19 and the pawl 22 respectively. The end of the adjusting rod 16 located outside the fixed sleeve 15 is fixedly connected to the transmission gear 2 20.

[0044] A connecting shaft 13 is rotatably connected to one end of the connecting sleeve 2. One end of the connecting shaft 13 is fixedly connected to a transmission gear 14, and the transmission gear 14 is meshed with the transmission gear 2 20 for transmission;

[0045] In order to avoid frequent removal of the wrench during the process of tightening the nut, when tightening the nut, the staff holds one end of the connecting rod 1 and rotates it forward. Since one side of the pawl 22 and the ratchet 12 form a completely fitted rotation, the rotation of the ratchet 12 can drive the pawl 22 to rotate accordingly, and then drive the entire connecting sleeve 2 to rotate accordingly, and tighten the nut. After rotating to the limit position, the connecting rod 1 is rotated in the opposite direction, and a sliding fit is formed between the ratchet 12 in the middle of the connecting rod 1 and the inclined side of the pawl 22. The squeezing of the ratchet 12 can make the pawl 22 move along the central axis of the mounting sleeve 19 with the adjusting rod 16. At this time, the elastic member 17 contracts and deforms, and as the connecting rod 1 rotates in the opposite direction, the adjusting rod 16 is used to adjust the pawl 22. Under the action of the elastic member 17, the reciprocating telescopic adjustment can make the connecting rod 1 only rotate by itself, and the connecting sleeve 2 does not move. When the connecting rod 1 rotates to the initial position, it continues to rotate forward and rotates to the limit position again. The nut is tightened by frequently rotating the adjusting rod 16 back and forth. When the nut needs to be loosened, it is only necessary to control the rotation of the connecting shaft 13, and the connecting shaft 13 then drives the transmission gear 14 to rotate. Due to the meshing transmission between the transmission gear 14 and the transmission gear 2 20, the installation sleeve 19 can be driven to rotate around the middle of the fixed sleeve 15, and then the adjusting rod 16 can be driven to rotate one hundred and eighty degrees, so that the pawl 22 fits with the other side of the ratchet 12 corresponding to it, so that the connecting sleeve 2 does not need to be removed from the nut during the process of rotating the connecting rod 1 to loosen the nut.

[0046] See also Figure 1 In one embodiment, a protective sleeve 3 is provided at one end of the connecting rod 1 away from the connecting sleeve 2. The material of the protective sleeve 3 is rubber material. By providing the rubber material, the staff can be protected to a certain extent on the hands during the screwing process.

[0047] The working principle of this utility model is:

[0048] In this embodiment, in order to avoid the wrench being frequently removed during the process of tightening the nut, when tightening the nut, the staff holds one end of the connecting rod 1 and rotates it forward. Since one side of the pawl 22 and the ratchet 12 are fully fitted together, the rotation of the ratchet 12 can drive the pawl 22 to rotate accordingly, and then drive the entire connecting sleeve 2 to rotate accordingly to tighten the nut. When it is rotated to the limit position, the connecting rod 1 is rotated in the reverse direction, and the tilt of the ratchet 12 in the middle of the connecting rod 1 and the pawl 22 is adjusted. A sliding fit is formed between the oblique sides. Through the squeezing of the ratchet 12, the pawl 22 can move along the central axis of the mounting sleeve 19 with the adjusting rod 16. At this time, the elastic member 17 contracts and deforms. As the connecting rod 1 rotates in the opposite direction, the adjusting rod 16 is reciprocated and telescopically adjusted under the action of the elastic member 17. The connecting rod 1 can rotate only by itself, and the connecting sleeve 2 does not move. When the connecting rod 1 rotates to the initial position, it continues to rotate forward and rotates to the limit position again. By frequently reciprocating the adjusting rod 16, the nut is tightened. When When the nut needs to be loosened, it is only necessary to control the rotation of the connecting shaft 13, and the connecting shaft 13 then drives the transmission gear 14 to rotate. Due to the meshing transmission between the transmission gear 14 and the transmission gear 2 20, the installation sleeve 19 can be driven to rotate around the middle of the fixed sleeve 15, and then the adjustment rod 16 can be driven to rotate 180 degrees, so that the pawl 22 fits with the other side of the ratchet 12 corresponding to it. In this way, when the connecting rod 1 is rotated to loosen the nut, there is no need to remove the connecting sleeve 2 from the nut, and when nuts of different sizes need to be tightened, When loosening or opening, by controlling the rotation of the adjusting shaft 4 inside the connecting sleeve 2, the adjusting shaft 4 drives the worm 5 to rotate. Due to the transmission connection between the worm 5 and the worm wheel 7, the adjusting plate 6 can be further driven to rotate. By rotating the adjusting plate 6, the connecting blocks 11 on both sides of the opening and closing plate 9 can slide along the straight slot 8 and the regular hexagonal slot 10 respectively, thereby realizing the opening and closing adjustment of the opening and closing plate 9. The opening and closing plate 9 can be adjusted to a state that fits the nut according to the different sizes of the nut, and finally the nuts of different types can be tightened or loosened.

[0049] Of course, it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, but also encompasses the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that fall within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0050] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0051] The technology, shape and structure that are not described in detail in this utility model are all well-known technologies.

Claims

1. A torque wrench for replacing valves in nuclear power plants, characterized by: The torque wrench for replacing valves in a nuclear power plant comprises: A connecting rod, one end of which is provided with a connecting sleeve, and an adjustment component in the middle of the connecting sleeve, the adjustment component is used to adjust accordingly according to different models of nuts; The ratchet structure is installed inside the connecting rod and cooperates with the connecting sleeve to prevent the wrench from being frequently removed from the nut during the tightening process.

2. The torque wrench for replacing valves in nuclear power plants according to claim 1, characterized in that: The adjustment component includes: An adjustment plate rotatably connected to the interior of the connecting sleeve, a plurality of straight notches are provided in the middle of the adjustment plate, and the plurality of straight notches are distributed in a circular array about the adjustment plate, a worm gear is provided on the outer side of the adjustment plate, a regular hexagonal groove is provided in the middle of the connecting sleeve, and a groove is provided on the side of the connecting sleeve away from the connecting rod; An adjusting shaft, the adjusting shaft being rotatably connected to the interior of the connecting sleeve, a worm being fixedly connected to the middle portion of the adjusting shaft, and a transmission connection being formed between the worm and the worm wheel; The opening and closing plate is located inside the connecting sleeve. Connecting blocks are provided on both sides of the opening and closing plate. The connecting blocks on both sides are respectively slidably matched with the straight notch and the regular hexagonal groove.

3. The torque wrench for replacing valves in nuclear power plants according to claim 2, characterized in that: The outer diameter of the connecting block is equal to the inner diameter of the straight slot and the regular hexagonal slot.

4. The torque wrench for replacing valves in a nuclear power plant according to claim 2, characterized in that: The ratchet structure comprises: A ratchet wheel is provided in the middle of the connecting rod and on one side of the connecting sleeve; A fixing sleeve, the fixing sleeve is fixedly mounted on the connecting sleeve on one side of the ratchet, the middle portion of the fixing sleeve is rotatably connected to the mounting sleeve, and the middle portion of the mounting sleeve is provided with a keyway; An adjusting rod, wherein the adjusting rod is located in the middle of the mounting sleeve, a convex groove is provided on the side of the adjusting rod, the convex groove and the key slot are slidably matched, a pawl is provided at one end of the adjusting rod, the pawl and the ratchet cooperate with each other, an elastic member is provided on the outer sleeve of the adjusting rod, the two ends of the elastic member are respectively fixedly connected to the mounting sleeve and the pawl, and one end of the adjusting rod located outside the fixed sleeve is fixedly connected to the transmission gear 2; A connecting shaft is rotatably connected to one end of the connecting sleeve, and one end of the connecting shaft is fixedly connected to a transmission gear 1, and the transmission gear 1 and the transmission gear 2 are meshed for transmission.

5. The torque wrench for replacing valves in nuclear power plants according to claim 1 or 2, characterized in that: A protective sleeve is provided at one end of the connecting rod away from the connecting sleeve, and the material of the protective sleeve is rubber material.

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