A hydraulic bolt tensioner

Abstract

The utility model belongs to the technical field of bolt tensioners, and discloses a bolt hydraulic tensioner, including a cylinder body, a tensioning head and an inner ring plate, the bottom end of the cylinder body is provided with a positioning mechanism for limiting the displacement of the inner ring plate, the top end of the cylinder body is provided with a limit mechanism for limiting the displacement of the tensioning head, the surface of the inner ring plate is fixedly connected with a circumferential array of teeth, and the surface of the cylinder body is fixedly connected with a fixing plate. When the motor equipment of the utility model fails and cannot be used, the ratchet wrench head can be sleeved on the bolt, and then the rotating rod can be rotated horizontally to drive the ratchet wrench head to rotate the bolt, further the gear shifts the teeth, and finally the inner ring plate drives the nut to rotate, and the rotating rod can be removed from the ratchet wrench head for rotating the tensioning head, the operation is more flexible, and the use is more convenient. When the motor is used to shift the teeth, the ratchet wrench head only needs to be removed from the bolt.

Description

Technical Field

[0001] The utility model belongs to the technical field of bolt tensioners, in particular to a bolt hydraulic tensioner. Background Art

[0002] Hydraulic bolt tensioner is also called hydraulic tensioner for short. It has the function of bolt tightening and disassembling. It can be widely used in metallurgy, mining, petrochemical, shipbuilding, power system, locomotive and heavy machinery and other industries. With the help of hydraulic power provided by ultra-high pressure pump and the elastic amplitude allowed by the material, the bolt is stretched in its elastic deformation zone to achieve the purpose of tightening or disassembling the bolt.

[0003] According to the patent number CN219426693U, a hydraulic bolt tensioner stretching mechanism is disclosed, which belongs to the technical field of hydraulic bolt tensioners. It includes a fixed object, a bolt is inserted inside the fixed object, a nut is threadedly connected to the outer surface of the bolt, a hydraulic cylinder is placed on the upper surface of the fixed object, the bolt is located inside the hydraulic cylinder, a threaded stretching head is inserted inside the hydraulic cylinder, the bolt thread is inserted inside the threaded stretching head, and the outer surface of the threaded stretching head is in contact with the upper surface of the hydraulic cylinder. The utility model is provided with a threaded stretching head, a hydraulic cylinder, a fastening mechanism and a power mechanism. When the bolt is stretched, the piston of the hydraulic cylinder can drive the threaded stretching head to move upward, thereby stretching the bolt. After the stretching is completed, the power mechanism can drive the fastening mechanism to rotate, and when the fastening mechanism rotates, the nut on the bolt can be tightened, so that the device can automatically tighten the nut after the bolt is stretched.

[0004] However, when the above solution is implemented, since the rotation of the rotating ring is only driven by the motor, when the motor equipment fails or cannot be used for maintenance, it is difficult to perform backup manual operation, which makes the tensioner inconvenient to use and reduces the practicality of the bolt tensioner. To this end, we provide a bolt hydraulic tensioner to solve the above problems. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a hydraulic bolt tensioner.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bolt hydraulic tensioner, comprising a cylinder body, a tensioning head and an inner ring plate, the bottom end of the cylinder body is provided with a positioning mechanism for limiting the displacement of the inner ring plate, the top end of the cylinder body is provided with a limiting mechanism for limiting the displacement of the tensioning head, the surface of the inner ring plate is fixedly connected with a circumferential array of teeth, the surface of the cylinder body is fixedly connected with a fixing plate, the upper and lower surfaces of the fixing plate are respectively rotatably connected with bolts and gears, and the axles of the bolts and gears are connected, the gears are meshed with the fixing plate, the surface of the bolts is sleeved with a ratchet wrench head, the surface of the cylinder body is fixedly connected with an elastic clamping block, a rotating rod is clamped in the elastic clamping block, the two bottom ends of the rotating rod are fixedly connected with positioning clamps, and the surface of the ratchet wrench head is provided with two disassembly mechanisms for positioning the two positioning clamps.

[0007] In the above technical solution, preferably, the positioning mechanism includes a ring rotatably connected to the top of the inner ring plate and two opposite fixed frames connected to the surface of the cylinder body, the surface of the ring is fixedly connected to two opposite guide columns, the inner wall of the cylinder body is provided with guide grooves compatible with the two guide columns, the surfaces of the two guide columns are provided with card slots, and the interiors of the two fixed frames are elastically provided with card blocks that are plugged into the card slots.

[0008] In the above technical solution, preferably, the inner wall of the fixed frame is fixedly connected with a second compression spring connected to the clamping block, the side of the clamping block is fixedly connected with a sliding rod penetrating to the outside of the fixed frame, and the second compression spring is wound around the surface of the sliding rod.

[0009] In the above technical solution, preferably, the limiting mechanism includes a positioning groove opened on the surface of the stretching head and two opposite positioning frames fixedly connected to the surface of the cylinder body, and adjacent side surfaces of the two positioning frames are elastically provided with a clamping head plugged into the positioning groove.

[0010] In the above technical solution, preferably, an L-shaped groove is opened on the upper surface of the two positioning frames, the inner walls of the two positioning frames are fixedly connected with a first compression spring connected to the clamping head, the tops of the two clamping heads are rotatably connected with a shift plate, and the shift plate slides in the L-shaped groove.

[0011] In the above technical solution, preferably, the inner wall of the inner ring plate is provided with two opposite installation cavities, positioning plates are slidably arranged in the two installation cavities, the surface of the inner ring plate is rotatably connected to two opposite screws, and one end of the two screws extends into the installation cavity and is connected to the internal thread of the positioning plate.

[0012] In the above technical scheme, preferably, the disassembly mechanism includes a first sleeve fixedly connected to the surface of the ratchet wrench head and a fixed column fixedly connected to the bottom end of the first sleeve, one end of the fixed column is fixedly connected to the second sleeve, a first sleeve rod is slidably arranged in the first sleeve and penetrates into the second sleeve, and a positioning clamp is sleeved on the surface of the first sleeve rod, a third compression spring connected to the first sleeve rod is fixedly connected to the inner wall of the first sleeve, a second sleeve rod connected to the first sleeve rod is penetrated through the side of the second sleeve, and the second sleeve rod is adapted to the opening at the bottom of the positioning clamp.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] 1. The utility model is equipped with teeth, gears, a ratchet wrench head, a fixing plate, a bolt, a rotating rod, an elastic clamp block, a positioning clamp and a disassembling mechanism. When the motor equipment fails and cannot be used, the ratchet wrench head can be sleeved on the bolt, and then the rotating rod can be rotated horizontally to drive the ratchet wrench head to rotate the bolt, and the gear further shifts the teeth, and finally the inner ring plate drives the nut to rotate, and the rotating rod can be removed from the ratchet wrench head for rotating the stretching head. The operation is more flexible and the use is more convenient. When the motor is used to shift the teeth, the ratchet wrench head only needs to be removed from the bolt.

[0015] 2. The utility model provides a positioning mechanism and a limiting mechanism. When the cylinder body is used, the stretching head and the inner ring plate can be clamped and fixed to the cylinder body, so as to facilitate the carrying of the device as a whole to ensure subsequent use. During specific operation, it is only necessary to push the stretching head downward into the cylinder body, and use the elastic force of the first compression spring to limit the clamping head to the positioning frame, so that the stretching head is fixed to the top of the cylinder body to prevent the stretching head from slipping out of the cylinder body. The two guide columns are inserted into the two guide grooves, and the clamping block is inserted into the clamping groove under the elastic force of the second compression spring, so as to fix the inner ring plate in the cylinder body. When the inner ring plate needs to be removed from the cylinder body, it is only necessary to pull the two sliding rods to separate the two clamping blocks from the two guide columns, and then use the gravity of the inner ring plate to directly fall off from the bottom of the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model when viewed from above;

[0017] Figure 2 This is a schematic diagram of the top view structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the inner ring plate of the utility model;

[0019] Figure 4 This is a schematic diagram of the internal structure of the positioning mechanism of the utility model;

[0020] Figure 5 It is a top cross-sectional view of the inner ring plate of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the limiting mechanism of the utility model;

[0022] Figure 7 It is a schematic diagram of the internal structure of the disassembly mechanism of the utility model;

[0023] Figure 8 It is a structural schematic diagram of the rotating rod of the utility model;

[0024] Fig. 9 For this utility model Figure 2 A magnified schematic diagram of the structure in the middle.

[0025] In the figure: 1. cylinder body; 2. stretching head; 21. positioning frame; 22. positioning groove; 23. clamping head; 24. L-shaped groove; 25. first compression spring; 26. dial plate; 31. fixed frame; 32. slide rod; 33. guide column; 34. collar; 35. clamping groove; 36. guide groove; 37. clamping block; 38. second compression spring; 4. inner ring plate; 51. teeth; 52. gear; 53. ratchet wrench head; 54. fixed plate; 55. bolt; 61. rotating rod; 62. elastic clamping block; 63. positioning clamp; 81. screw rod; 82. positioning plate; 83. installation cavity; 91. first sleeve; 92. second sleeve; 93. second set of rods; 94. fixed column; 95. first set of rods; 96. third compression spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figures 1 to 9As shown, the utility model provides a bolt hydraulic tensioner, including a cylinder body 1, a tensioning head 2 and an inner ring plate 4. A positioning mechanism for limiting the displacement of the inner ring plate 4 is provided at the bottom of the cylinder body 1. The inner ring plate 4 can be fixed to the bottom of the cylinder body 1 through the positioning mechanism to ensure that the inner ring plate 4 and the cylinder body 1 are integrated into one body for easy carrying. A limiting mechanism for limiting the displacement of the tensioning head 2 is provided at the top of the cylinder body 1. When the device is not in use, the tensioning head 2 can be limited to the top of the cylinder body 1 through the limiting mechanism, so as to facilitate the overall carrying. A circumferential array of teeth 51 is fixedly connected to the surface of the inner ring plate 4, and a fixing plate 54 is fixedly connected to the surface of the cylinder body 1. Bolts 55 and gears 52 are rotatably connected to the upper and lower surfaces of the fixing plate 54, and the shafts of the bolts 55 and the gears 52 are respectively connected. The inner ring plate 4 is connected to the center of the cylinder 1, and the gear 52 is meshed with the fixing plate 54. The gear 52 can be driven to rotate by turning the bolt 55, and the gear 52 further drives the fixing plate 54 to rotate the inner ring plate 4. The surface of the bolt 55 is sleeved with a ratchet wrench head 53, and the ratchet wrench head 53 is a prior art, so that the ratchet wrench head 53 can reciprocate the bolt 55, and the ratchet wrench head 53 can have a dismantling function, so that the ratchet wrench head 53 is removed from the fixing plate 54 away from the bolt 55. An elastic clamp block 62 is fixedly connected to the surface of the cylinder body 1, and a rotating rod 61 is clamped in the elastic clamp block 62. The rotating rod 61 is fixed to the surface of the cylinder body 1 by the elastic clamp block 62 for easy use by personnel. The two bottom ends of the rotating rod 61 are fixedly connected with positioning clamps 63. The surface of the ratchet wrench head 53 The surface is provided with two disassembling mechanisms for positioning the two positioning clamps 63, the disassembling mechanisms include a first sleeve 91 fixedly connected to the surface of the ratchet wrench head 53 and a fixing column 94 fixedly connected to the bottom end of the first sleeve 91, one end of the fixing column 94 is fixedly connected to the second sleeve 92, a first sleeve rod 95 is slidably provided in the first sleeve 91 and penetrates into the second sleeve 92, and the positioning clamp 63 is sleeved on the surface of the first sleeve rod 95, a third compression spring 96 connected to the first sleeve rod 95 is fixedly connected to the inner wall of the first sleeve 91, a second sleeve rod 93 connected to the first sleeve rod 95 is penetrated on the side of the second sleeve 92, and the second sleeve rod 93 is adapted to the opening at the bottom of the positioning clamp 63, when the positioning clamp 63 is sleeved on the first sleeve rod 95, the rotating rod 61 will not be separated from it at this time When the rotating rod 61 needs to be separated, it is only necessary to press the two second rods 93 to push the first rod 95 into the first sleeve 91. At this time, the bottom end of the positioning clamp 63 is on the surface of the second rod 93, and the positioning clamp 63 can be pulled out upward from the surface of the second rod 93, so that the rotating rod 61 is inserted into the jack on the stretching head 2 to rotate it. Through the setting of the above structure, a motor can be installed on the surface of the cylinder body 1, and a driving gear can be installed at the output end of the motor, so that the driving gear drives the rotation of the gear 52. At this time, the ratchet wrench head 53 can be removed from the bolt 55 to ensure the normal operation of the motor. When the motor equipment fails and cannot be used, the ratchet wrench head 53 can be sleeved on the bolt 55, and then the rotating rod 61 can be removed from the elastic clamp block 62.By rotating the rotating rod 61 horizontally, the ratchet wrench head 53 can be driven to rotate the bolt 55, and the gear 52 can further shift the teeth 51, and finally the inner ring plate 4 can drive the nut to rotate. The rotating rod 61 can be removed from the ratchet wrench head 53 to rotate the stretching head 2, which is more flexible and convenient to use. When the machinery, parts and equipment in the device are all conventional models in the prior art.

[0028] like Figure 1 , Figure 3 , Figure 4 As shown, the positioning mechanism includes a collar 34 rotatably connected to the top of the inner ring plate 4 and two opposite fixed frames 31 connected to the surface of the cylinder body 1. The surface of the collar 34 is fixedly connected to two opposite guide columns 33. The inner wall of the cylinder body 1 is provided with a guide groove 36 adapted to the two guide columns 33. The surfaces of the two guide columns 33 are provided with a clamping groove 35. The interiors of the two fixed frames 31 are elastically provided with a clamping block 37 plugged into the clamping groove 35. The inner wall of the fixed frame 31 is fixedly connected to a second compression spring 38 connected to the clamping block 37. The side of the clamping block 37 is fixedly connected to a sliding rod 32 that penetrates to the outside of the fixed frame 31, and the second compression spring 38 is wound around the surface of the sliding rod 32. With the above-mentioned structure, the inner ring plate 4 can be positioned in the cylinder body 1 to prevent the inner ring plate 4 from falling off from the bottom of the cylinder body 1. This further ensures the stability of the inner ring plate 4, and also makes it convenient to carry the inner ring plate 4 together, thereby improving the convenience of subsequent use. When using it specifically, it is only necessary to align the two guide posts 33 with the two guide grooves 36 in the cylinder body 1 and insert them. At this time, the two guide posts 33 will push the card block 37 into the fixed frame 31 until the card groove 35 reaches the card block 37, and the card block 37 is inserted into the card groove 35 under the elastic force of the second compression spring 38, so that the inner ring plate 4 can be fixed in the cylinder body 1, and the inner ring plate 4 will rotate in the collar 34 when rotating, and will not drive the rotation of the guide posts 33. When the inner ring plate 4 needs to be removed from the cylinder body 1, it is only necessary to pull the two sliding rods 32 to separate the two card blocks 37 from the two guide posts 33, and then use the gravity of the inner ring plate 4 to directly fall off from the bottom of the cylinder body 1.

[0029] like Figure 1 , Figure 2 , Figure 6As shown, the limiting mechanism includes a positioning groove 22 provided on the surface of the stretching head 2 and two opposite positioning frames 21 fixedly connected to the surface of the cylinder body 1. The adjacent side surfaces of the two positioning frames 21 are elastically provided with a clamping head 23 plugged into the positioning groove 22. The upper surfaces of the two positioning frames 21 are provided with an L-shaped groove 24. The inner walls of the two positioning frames 21 are fixedly connected with a first compression spring 25 connected to the clamping head 23. The tops of the two clamping heads 23 are rotatably connected with a dial plate 26, and the dial plate 26 slides in the L-shaped groove 24. When the stretching head 2 is in use, the dial plate 26 is pulled to drive the clamping head 23 to move together, so that the dial plate 26 is pulled to the opening of the L-shaped groove 24, and then flipped. The dial plate 26 can position the clamping head 23 in the positioning frame 21, so that the stretching head 2 can work normally at the top of the cylinder body 1. Through the setting of the above structure, when the stretching head 2 is used up, the stretching head 2 is inserted into the cylinder body 1. Since the upper surface of the clamping head 23 is inclined, the surface of the stretching head 2 will drive the clamping head 23 to slide into the positioning frame 21 until the positioning groove 22 reaches the clamping head 23. The clamping head 23 is limited to the positioning frame 21 by the elastic force of the first compression spring 25, so that the stretching head 2 is fixed at the top of the cylinder body 1 to prevent the stretching head 2 from slipping out of the cylinder body 1, so that the stretching head 2 and the cylinder body 1 are integrated for subsequent use.

[0030] like Figure 3 , Figure 5 As shown, the inner wall of the inner ring plate 4 is provided with two opposite installation cavities 83, and positioning plates 82 are slidably arranged in the two installation cavities 83. The surface of the inner ring plate 4 is rotatably connected to two opposite screws 81, and one end of the two screws 81 extends into the installation cavity 83 and is connected to the internal threads of the positioning plates 82. Through the setting of the above structure, the inner ring plate 4 can adapt to nuts of different sizes. It is only necessary to rotate the two screws 81 to control the extension of the two positioning plates 82, so that the two positioning plates 82 can be sleeved on the nuts. The subsequent rotation of the inner ring plate 4 can make the two positioning plates 82 drive the nuts to rotate, and there is no need to replace the inner ring plate 4, thereby improving the applicability of the inner ring plate 4.

[0031] The working principle and use process of the utility model are as follows: when the motor equipment fails and cannot be used, the ratchet wrench head 53 can be sleeved on the bolt 55, and then the rotating rod 61 can be removed from the elastic clamping block 62, and the rotating rod 61 can be rotated horizontally to drive the ratchet wrench head 53 to rotate the bolt 55, and further make the gear 52 to shift the teeth 51, and finally make the inner ring plate 4 drive the nut to rotate, and the rotating rod 61 can be removed from the ratchet wrench head 53 to be used for rotating the stretching head 2, which is more flexible to operate and more convenient to use. After the cylinder body 1 is used, the stretching head 2 and the inner ring plate 4 can be clamped and fixed to the cylinder body 1, so as to facilitate the carrying of the device as a whole. Belt, to ensure subsequent use, during specific operation, it is only necessary to push the stretching head 2 downward into the cylinder body 1, and use the elastic force of the first compression spring 25 to limit the clamping head 23 to the positioning frame 21, so that the stretching head 2 is fixed at the top of the cylinder body 1 to prevent the stretching head 2 from slipping out of the cylinder body 1, and use the two guide columns 33 to insert the two guide grooves 36, and insert the clamping block 37 into the clamping groove 35 under the elastic force of the second compression spring 38, so that the inner ring plate 4 can be fixed in the cylinder body 1. When the inner ring plate 4 needs to be removed from the cylinder body 1, it is only necessary to pull the two sliding rods 32 to separate the two clamping blocks 37 from the two guide columns 33, and then use the gravity of the inner ring plate 4 to directly fall off from the bottom of the cylinder body 1.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be 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 be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Contents not described in detail in the specification belong to the prior art known to professional and technical personnel in this field.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bolt hydraulic tensioner, comprising a cylinder (1), a tensioning head (2) and an inner ring plate (4), characterized in that: The bottom end of the cylinder body (1) is provided with a positioning mechanism for limiting the displacement of the inner ring plate (4), and the top end of the cylinder body (1) is provided with a limiting mechanism for limiting the displacement of the stretching head (2). The surface of the inner ring plate (4) is fixedly connected with a circumferential array of teeth (51), and the surface of the cylinder body (1) is fixedly connected with a fixing plate (54). The upper and lower surfaces of the fixing plate (54) are rotatably connected with bolts (55) and gears (52), and the bolts (55) and gears (52) are respectively connected to each other. The gear (52) is meshed with the fixing plate (54), the surface of the bolt (55) is sleeved with a ratchet wrench head (53), the surface of the cylinder body (1) is fixedly connected with an elastic clamp block (62), a rotating rod (61) is clamped in the elastic clamp block (62), the two bottom ends of the rotating rod (61) are fixedly connected with positioning clamps (63), and the surface of the ratchet wrench head (53) is provided with two disassembly mechanisms for positioning the two positioning clamps (63).

2. A hydraulic bolt tensioner according to claim 1, characterized in that: The positioning mechanism comprises a collar (34) rotatably connected to the top of the inner ring plate (4) and two opposite fixed frames (31) connected to the surface of the cylinder body (1); the surface of the collar (34) is fixedly connected to two opposite guide columns (33); the inner wall of the cylinder body (1) is provided with guide grooves (36) adapted to the two guide columns (33); the surfaces of the two guide columns (33) are provided with card slots (35); and the interiors of the two fixed frames (31) are elastically provided with card blocks (37) plugged into the card slots (35).

3. A hydraulic bolt tensioner according to claim 2, characterized in that: The inner wall of the fixed frame (31) is fixedly connected to a second compression spring (38) connected to a clamping block (37), the side of the clamping block (37) is fixedly connected to a sliding rod (32) that passes through the outside of the fixed frame (31), and the second compression spring (38) is wound around the surface of the sliding rod (32).

4. A hydraulic bolt tensioner according to claim 1, characterized in that: The limiting mechanism comprises a positioning groove (22) formed on the surface of the stretching head (2) and two opposite positioning frames (21) fixedly connected to the surface of the cylinder body (1); adjacent side surfaces of the two positioning frames (21) are elastically provided with a clamping head (23) plugged into the positioning groove (22).

5. A hydraulic bolt tensioner according to claim 4, characterized in that: The upper surfaces of the two positioning frames (21) are each provided with an L-shaped groove (24); the inner walls of the two positioning frames (21) are each fixedly connected with a first compression spring (25) connected to the clamping head (23); the tops of the two clamping heads (23) are each rotatably connected with a shifting plate (26), and the shifting plate (26) slides in the L-shaped groove (24).

6. A hydraulic bolt tensioner according to claim 1, characterized in that: The inner wall of the inner ring plate (4) is provided with two opposite installation cavities (83), and a positioning plate (82) is slidably arranged in each of the two installation cavities (83). The surface of the inner ring plate (4) is rotatably connected to two opposite screw rods (81), and one end of each screw rod (81) extends into the installation cavity (83) and is connected to the internal thread of the positioning plate (82).

7. The hydraulic bolt tensioner according to claim 1, characterized in that: The disassembling mechanism comprises a first sleeve (91) fixedly connected to the surface of the ratchet wrench head (53) and a fixing column (94) fixedly connected to the bottom end of the first sleeve (91); one end of the fixing column (94) is fixedly connected to the second sleeve (92); a first sleeve rod (95) is slidably arranged in the first sleeve (91) and penetrates into the second sleeve (92); a positioning clamp (63) is sleeved on the surface of the first sleeve rod (95); a third compression spring (96) connected to the first sleeve rod (95) is fixedly connected to the inner wall of the first sleeve (91); a second sleeve rod (93) connected to the first sleeve rod (95) is penetrated through the side of the second sleeve (92); and the second sleeve rod (93) is adapted to the opening at the bottom of the positioning clamp (63).

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