Stretcher deflector rod assembly and bolt tensioner

Abstract

The utility model discloses a tensioner deflector rod assembly and a bolt tensioner, and belongs to the technical field of bolt tensioners. The deflector rod assembly comprises a lantern ring and a deflector rod, wherein a hollow positioning rod is connected to the outer peripheral wall of the lantern ring; the shifting rod is arranged in the hollow cavity of the positioning rod in a sliding mode, and the shifting rod extends to the two ends outside the positioning rod to form a positioning part and a holding part respectively. And an elastic piece is arranged between the positioning rod and the shifting rod and is used for maintaining the positioning part in an extending state. The deflector rod assembly can be rotationally arranged on the supporting sleeve of the tensioner body in a sleeving mode through the lantern ring, when the positioning part moves to the position of a process groove in the deflector rod assembly or the nut, the positioning part can be clamped into the corresponding process groove, and accurate positioning between the deflector rod and the process groove is completed. Therefore, the positioning operation between the deflector rod and the process groove is more convenient and quicker.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bolt tensioner technical field, more specifically, relate to a kind of tensioner push rod assembly and bolt tensioner. BACKGROUND

[0002] Hydraulic bolt tensioner is short for hydraulic tensioner, it has the function of bolt fastening and disassembly. It can be widely used in metallurgical mines, petroleum chemical industry, shipbuilding industry, power system, rolling stock, heavy machinery and other industries. Hydraulic tensioner uses the elastic range allowed by the material to stretch the bolt in its elastic deformation zone with the help of the hydraulic power provided by ultra-high pressure pump, to achieve the purpose of fastening or disassembling the bolt.

[0003] The existing hydraulic tensioner, after stretching the screw rod, to facilitate the rotation of the nut to achieve the final locking operation, will often be equipped with a push sleeve and a push rod. Among them, the push sleeve is generally arranged in the supporting sleeve, the push sleeve is arranged on the nut, and then the push rod is inserted into the push sleeve through the through hole on the supporting sleeve. The rotation of the push sleeve is driven by the push rod, and the rotation of the nut is completed.

[0004] For example, the patent CN209394608U discloses a generator anchor bolt tensioner. In the application, the outer diameter of the push sleeve is consistent with the inner diameter of the base, and the push sleeve is placed in the base. The push sleeve is internally designed with an internal hexagonal structure, directly cooperates with the generator anchor bolt, and a diameter hole is formed at the center of each side of the push sleeve for inserting and pulling the push rod. The purpose of rotating the nut is achieved by pushing the push sleeve.

[0005] For example, the patent CN211890647U discloses a double-oil-cavity hydraulic tensioner. In the application, a push rod is inserted into the inside of the support, and an operating hole is formed in the sleeve at the position of the nut. The operating hole is elliptical, and the push rod can be inserted into the operating hole to push the nut.

[0006] The above-mentioned application can achieve the locking function of the nut, but also has certain defects. For example, the push rod is separately arranged, which is easy to cause the loss of parts. At the same time, the positioning and insertion operation between the push rod and the diameter hole on the push sleeve is relatively cumbersome, which is not conducive to improving work efficiency. UTILITY MODEL CONTENTS

[0007] 1. Problem to be solved

[0008] In view of at least some problems existing in the above prior art, the utility model provides a tensioner push rod assembly, which aims to solve the problem of cumbersome insertion and positioning operation between the push rod and the push sleeve of the existing bolt tensioner.

[0009] 2. Technical scheme

[0010] In order to solve the above problems, the technical scheme adopted by the utility model is as follows:

[0011] The utility model discloses a kind of stretchers of lever assembly, including collar,

[0012] The outer peripheral wall of the collar is connected with a hollow positioning rod.

[0013] And lever,

[0014] The lever is slidably arranged in the hollow chamber of the positioning rod, and the two ends of the lever extending out of the positioning rod form a positioning part and a holding part respectively.

[0015] The positioning rod and the lever are provided with an elastic member, which is used to maintain the positioning part in an extended state.

[0016] Further, the hollow chamber of the positioning rod is a stepped hole, the lever is provided with a limiting boss in the large diameter section of the stepped hole, and the end of the large diameter section of the stepped hole is provided with a plugging block; the lever is provided with an elastic member, which is limited between the limiting boss and the plugging block.

[0017] Further, the positioning part is in the shape of a circular truncated cone or a wedge.

[0018] The utility model also provides a bolt stretcher, which comprises a stretcher body and a lever assembly, the lever assembly is the above-mentioned stretcher lever assembly, the collar of the stretcher lever assembly is rotatably arranged on the supporting sleeve of the stretcher body, and the supporting sleeve is provided with a slot through which the lever can rotate at a certain angle.

[0019] Further, the stretcher body comprises an oil cylinder, a piston and a pull rod arranged in sequence, the oil cylinder is provided with an end cover, and the pull rod is provided with a disc spring, which is limited between the lower end surface of the end cover and the upper end surface of the positioning boss on the pull rod.

[0020] Further, the lower end surface of the positioning boss is an inclined surface matched with the inner hole of the piston.

[0021] Further, the side wall of the oil cylinder is provided with an oil distribution block connected with a high-pressure connector, and the oil distribution block is in communication with the oil cavity between the oil cylinder and the piston.

[0022] Further, the top of the pull rod is connected with a top cover, and the top and / or side surface of the top cover is provided with an assembly hole.

[0023] 3. Advantageous effects

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] (1) In a tensioner lever assembly of the present invention, a collar is rotatably fitted onto the support sleeve of the tensioner body; at this time, the positioning part of the lever passes through the slot on the support sleeve and is at the same height as the process groove on the sleeve or nut; and the positioning part is reliably fastened to the outer peripheral wall of the sleeve or nut under the action of the elastic element; as the collar rotates, when the positioning part moves to the position of the process groove on the sleeve or nut, it can be inserted into the corresponding process groove, thus completing the precise positioning between the lever and the process groove; in addition, the tensioner lever assembly of the present invention can be directly fitted onto the support sleeve and form an integral part with the tensioner body, making the lever less likely to be lost.

[0026] (2) In contrast to the traditional manual reset operation, a disc spring is provided between the lower end face of the end cap and the upper end face of the positioning boss on the pull rod. The self-restoring force of the disc spring can realize the automatic reset operation of the piston, making the reset operation more convenient and faster, and improving work efficiency.

[0027] (3) In the bolt tensioner of this utility model, the lower end face of the positioning boss is an inclined surface that cooperates with the inner hole of the piston, so that the piston and the pull rod are in a conical fit, which has an automatic centering function, effectively preventing the pull rod from moving left and right during the operation, effectively avoiding the jamming phenomenon during the up and down movement of the pull rod, and thus ensuring the performance of the tensioner.

[0028] (4) A bolt tensioner of the present invention has a top cover connected to the top of the pull rod, and the top cover is provided with an assembly hole; by the cooperation of the output end of the electric wrench with the top assembly hole of the top cover, or the cooperation of the lever with the side assembly hole of the top cover, the pull rod and the detachable nut can be pre-tightened. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a tensioner lever assembly according to the present invention;

[0030] Figure 2 This is a schematic diagram of the internal structure of a tensioner lever assembly according to the present invention;

[0031] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0032] Figure 4 This is a structural schematic diagram of a bolt tensioner according to the present invention;

[0033] Figure 5 This is a schematic diagram of the internal structure of a bolt tensioner according to the present invention.

[0034] In the diagram: 1. Collar; 2. Positioning rod; 3. Lever; 31. Positioning part; 32. Grip part; 33. Limiting boss; 4. Elastic element; 5. Sealing block;

[0035] 6. Tensioner body; 61. Oil cylinder; 62. Piston; 63. Tie rod; 631. Positioning boss; 64. Support sleeve; 65. End cover; 66. Disc spring; 67. Oil distribution block; 68. High-pressure connector; 69. Top cover; 691. Assembly hole. Detailed Implementation

[0036] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] The present invention will be further described below with reference to specific embodiments.

[0039] like Figure 1 As shown, a tensioner lever assembly of this embodiment includes a collar 1, a positioning rod 2, and a lever 3. The collar 1 is rotatably fitted onto a support sleeve 64 of the tensioner. The support sleeve 64 must have a slot through which the lever 3 passes and can rotate at a certain angle. The positioning rod 2 is a hollow rod structure, with one end penetrating the outer peripheral wall of the collar 1 and driving the collar 1 to rotate. The lever 3 is slidably disposed within the hollow cavity of the positioning rod 2, with its two ends extending beyond the positioning rod 2, forming a positioning part 31 and a gripping part 32, respectively. An elastic element 4 is provided between the positioning rod 2 and the lever 3 to maintain the positioning part 31 in an extended state.

[0040] Specifically, refer to Figure 2 , Figure 3 As shown, the hollow cavity of the positioning rod 2 is an integral stepped hole. The lever 3 has a limiting boss 33 located within the large-diameter section of the stepped hole. The elastic element 4 is located within this large-diameter section and is sleeved on the lever 3. Simultaneously, a sealing block 5 is provided at the end of this large-diameter section, and the elastic element 4 is limited and compressed between the limiting boss 33 and the sealing block 5. The elastic element 4 can be a spring. Furthermore, the sealing block 5 needs to have a through hole for the gripping part 32 to pass through.

[0041] Preferably, the positioning portion 31 can be in the shape of a circular truncated cone or a wedge. The circular truncated cone-shaped positioning portion 31 is designed for facilitating insertion into a circular process slot, while the wedge-shaped positioning portion 31 is designed for facilitating cooperation with a rectangular process slot. Of course, the positioning portion 31 can also be designed in other shapes, such as a semicircle, according to the actual shape of the process slot. It should be noted that the process slot refers to a slot hole formed on the socket or nut for insertion of the lever 3.

[0042] The working process of the lever assembly of the stretch device is as follows: first, the holding portion 32 is pulled to retract the lever 3 into the positioning rod 2; then, the sleeve ring 1 is rotated to be sleeved on the supporting sleeve 64 of the stretch device, and then the holding portion 32 is released, thereby completing the assembly operation between the lever assembly and the supporting sleeve 64. At this time, the positioning portion 31 is reliably clamped on the outer peripheral wall of the socket or the nut to be assembled under the action of the elastic member 4. Meanwhile, it should be noted that after assembly, the positioning portion 31 of the lever 3 should pass through the notch on the supporting sleeve 64 and be located at the same height as the process hole on the socket or the nut to be assembled.

[0043] Then, the sleeve ring 1 and the lever 3 are rotated by the positioning rod 2; when the positioning portion 31 moves to the position of the process slot on the socket or the nut to be assembled, it can be clamped into the corresponding process slot, thereby completing the accurate positioning between the lever 3 and the process slot. Then, the nut is further rotated by rotating the positioning rod 2, thereby completing the final locking operation.

[0044] The embodiment also provides a bolt stretch device, which comprises a stretch device body 6 and the above-mentioned lever assembly. The outer peripheral wall of the supporting sleeve 64 of the stretch device body 6 is provided with an annular mounting groove, and the sleeve ring 1 of the lever assembly is rotatably sleeved on the mounting groove. The supporting sleeve 64 is also provided with a notch through which the lever 3 can be rotated by a certain angle.

[0045] It should be noted that, in order to prevent interference between the end of the positioning rod 2 and the socket or the nut, the length of the positioning rod 2 extending into the inner cavity of the sleeve ring 1 should be less than the wall thickness of the supporting sleeve 64. Of course, the end of the positioning rod 2 can also not extend into the inner cavity of the sleeve ring 1, in which case the end of the positioning rod 2 is flush with the inner wall of the sleeve ring 1. Meanwhile, it should be noted that the bolt stretch device of the embodiment can be provided with a socket (not shown in the figure) in the supporting sleeve 64, or can not be provided with a socket, but a process slot for insertion of the lever 3 is directly reserved on the nut.

[0046] Specifically, reference is made to Figure 4 , Figure 5As shown, the stretcher body 6 includes a cylinder 61, a piston 62 and a pull rod 63 which are sequentially sleeved. The cylinder 61 is provided with an end cover 65, and the pull rod 63 is sleeved with a disc spring 66. The disc spring 66 is limited between the lower end surface of the end cover 65 and the upper end surface of a positioning boss 631 on the pull rod 63, and is used for resetting the piston 62. Compared with the traditional manual reset operation, in the embodiment, the automatic reset operation of the piston 62 can be realized by using the self-restoring force of the disc spring 66, so that the reset operation of the piston 62 is more convenient and fast, and the working efficiency is improved.

[0047] Meanwhile, a split oil block 67 is arranged on the side wall of the cylinder 61, the split oil block 67 is connected with a high-pressure joint 68, and the split oil block 67 and the oil cavity formed between the cylinder 61 and the piston 62 are in communication with each other. Through the arrangement of the split oil block 67, the distribution of the oil circuit can be designed; meanwhile, a joint seal is arranged at the connection between the split oil block 67 and the cylinder 61 to ensure the sealing performance and prevent oil leakage. In addition, a sealing washer also needs to be arranged on the contact surface between the piston 62 and the cylinder 61.

[0048] In order to prevent the pull rod 63 from moving left and right during the working process, thereby affecting the normal effect of the stretcher. In the embodiment, the lower end surface of the positioning boss 631 is an inclined surface matched with the inner hole of the piston 62. That is, the piston 62 and the pull rod 63 are matched with the conical surface, thereby having the automatic centering function, which can effectively avoid the jamming phenomenon during the upward and downward movement of the pull rod 63, and ensure the use effect of the stretcher.

[0049] As a preferred embodiment of the bolt stretcher, a top cover 69 is further connected to the top of the pull rod 63, and the top and / or side of the top cover 69 is provided with an assembly hole 691. Through the cooperation of the output end of the electric wrench and the top assembly hole 691 of the top cover 69, or the cooperation of the handle and the side assembly hole 691 of the top cover 69, the preliminary pre-tightening operation between the pull rod 63 and the detachable nut can be conveniently performed.

[0050] The working principle of the bolt stretcher is as follows: the bolt stretcher body is placed on the bolt to be assembled, the top cover 69 drives the pull rod 63 to rotate for preliminary pre-tightening. Then, high-pressure oil is introduced into the oil cavity between the cylinder 61 and the piston 62, and under the action of the high-pressure oil, the piston 62 moves upward; the positioning boss 631 drives the entire pull rod 63 to move upward, thereby stretching the bolt to be assembled, and compressing the disc spring 66. Then, the nut is locked by the handle assembly. When the stretching is completed and needs to be reset, the disc spring 66 pushes the piston 62 to reset under the action of the elastic force, and the high-pressure oil is pressed out.

[0051] The bolt tensioner of the embodiment can not only simplify the positioning operation between the push rod 3 and the process tank, but also connect the push rod 3 and the bolt tensioner as a whole to prevent the loss of the push rod 3, so that the push rod 3 can be taken as needed.

[0052] The above description of the utility model and its embodiments is illustrative and not limiting, and the embodiments shown in the drawings are only one of the embodiments of the utility model, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structural modes and embodiments are designed without creativity, which should all belong to the protection scope of the utility model.

Claims

1. A stretch er dial lever assembly characterized by: The sleeve ring (1) is connected with a hollow positioning rod (2) on the outer wall thereof. The pushing rod (3) is slidably arranged in the hollow chamber of the positioning rod (2) and extends to both ends of the positioning rod (2) to form a positioning part (31) and a holding part (32) respectively. An elastic member (4) is arranged between the positioning rod (2) and the pushing rod (3) and is used to maintain the positioning part (31) in an extended state. The hollow chamber of the positioning rod (2) is a stepped hole, the pushing rod (3) is provided with a limiting boss (33) in the large-diameter section of the stepped hole, and the end of the large-diameter section of the stepped hole is provided with a blocking block (5); the elastic member (4) is sleeved on the pushing rod (3) and is limited between the limiting boss (33) and the blocking block (5). The positioning part (31) is in the shape of a circular truncated cone or a wedge.

2. A stretch er pull rod assembly according to claim 1 wherein: The pushing rod assembly is the stretching device pushing rod assembly of any one of claims 1-3, the sleeve ring (1) of the stretching device pushing rod assembly is rotatably sleeved on a supporting sleeve (64) of a stretching device body (6), and the supporting sleeve (64) is provided with a slot through which the pushing rod (3) passes and can rotate by a certain angle.

3. A stretch er pull rod assembly according to claim 1 or 2, wherein: The stretching device body (6) comprises an oil cylinder (61), a piston (62) and a pulling rod (63) which are sequentially sleeved; the oil cylinder (61) is provided with an end cover (65), the pulling rod (63) is sleeved with a disc spring (66), and the disc spring (66) is limited between the lower end surface of the end cover (65) and the upper end surface of a positioning boss (631) on the pulling rod (63).

4. A bolt tensioner comprising a tensioner body (6) and a lever assembly, characterised in that: The lower end surface of the positioning boss (631) is an inclined surface matched with the inner hole of the piston (62).

5. A bolt tensioner according to claim 4 wherein: The side wall of the oil cylinder (61) is provided with an oil distribution block (67) connected with a high-pressure connector (68); the oil distribution block (67) is in communication with the oil cavities between the oil cylinder (61) and the piston (62).

6. A bolt tensioner according to claim 5 wherein: The top of the pulling rod (63) is connected with a top cover (69), and the top and / or side surface of the top cover (69) is provided with an assembly hole (691).

7. A bolt tensioner according to claim 6 wherein: ​ 8. A bolt tensioner according to any one of claims 5-7, characterized in that: ​

Images