Stretching mechanism of hydraulic bolt tensioner

Abstract

The utility model relates to the technical field of hydraulic bolt tensioners, and discloses a hydraulic bolt tensioner stretching mechanism which comprises a stretching assembly, the stretching assembly is composed of a stretching head and a detachable stretching sleeve in a dismounting mode, a sleeving groove is formed in the stretching head, and the detachable stretching sleeve is matched with the stretching head through the sleeving groove in the stretching head. According to the stretching head, when the stretching head is used, the detachable stretching sleeve can be inserted into the stretching head firstly and is in butt joint with the limiting groove in a limiting mode preliminarily through the limiting piece, and meanwhile the limiting screw hole in the detachable stretching sleeve and the limiting screw hole in the periphery of the stretching head coincide and communicate with each other; at the moment, the fixing bolt is in threaded installation with the stretching head and the limiting screw hole in the detachable stretching sleeve, the stretching head can stretch the external bolt for use through the threaded meshing groove in the detachable stretching sleeve, the fixing bolt is detached after use and abrasion, and the detachable stretching sleeve is independently taken out for replacement. Therefore, the effect of improving the use efficiency is achieved.

Description

Technical Field

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

[0002] Bolt tensioners are generally composed of a hydraulic pump, a high-pressure hose, a pressure gauge and a tensioning body. Bolt tensioners can convert hydraulic energy into mechanical energy, so that the tensioning mechanism is pressed to stretch the bolt, thereby realizing the tightening operation of the bolt.

[0003] However, when the existing stretching mechanism is used to stretch the external bolts through the inner threads of the mechanism for a long time, the threads inside the stretching mechanism are prone to wear and deformation, which leads to dislocation between the external bolts during subsequent stretching, affecting the stretching use. The existing stretching mechanism needs to be replaced after long-term use, and the subsequent repair process is relatively cumbersome, affecting the use efficiency. For this reason, we propose a hydraulic bolt tensioner stretching mechanism. Utility Model Content

[0004] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a hydraulic bolt tensioner tensioning mechanism.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hydraulic bolt tensioner stretching mechanism, including a stretching assembly, the stretching assembly is composed of a stretching head and a detachable stretching sleeve, the interior of the stretching head is provided with a sleeve groove, the detachable stretching sleeve is installed and matched with the stretching head through the sleeve groove inside the stretching head, the inner side of the detachable stretching sleeve is provided with a thread engagement groove for engaging with the external bolt thread, the upper periphery of the stretching head is provided with a limiting screw hole that passes through the detachable stretching sleeve, the internal thread of the limiting screw hole is installed with a fixing bolt for reinforcing the detachable stretching sleeve, and the upper periphery of the stretching head is provided with an external disassembly groove for disassembling the stretching head.

[0006] Preferably, a limiting groove communicating with the sleeve groove is provided on the top of the stretching head, and two sets of mirror-symmetrical limiting members are installed at positions corresponding to the limiting groove on the periphery of the detachable stretching sleeve;

[0007] Furthermore, when the detachable stretch sleeve is inserted into the sleeve groove inside the stretching head for installation, the limiting piece on the periphery of the detachable stretch sleeve is in a limiting clamping state with the limiting groove on the top of the stretching head.

[0008] Preferably, a top piece is provided at the top of the detachable stretch sleeve, a reinforcement seat is integrally formed at the bottom of the top piece, an internal thread is provided on the inner wall of the upper end of the detachable stretch sleeve, and an external thread matching the internal thread is provided on the periphery of the reinforcement seat;

[0009] Furthermore, the top piece is in threaded connection with the internal thread on the inner side of the detachable stretch sleeve through the external thread on the outer periphery of the reinforcement seat.

[0010] Preferably, when the stretching head is hydraulically pressed upward to stretch the external bolt through the detachable stretching sleeve, the detachable stretching sleeve is in a limited support state for the detachable stretching sleeve through the top piece located at the upper end of the stretching head.

[0011] Beneficial Effects

[0012] The utility model provides a hydraulic bolt tensioner tensioning mechanism, which has the following beneficial effects:

[0013] (1) A hydraulic bolt tensioner stretching mechanism, in this article, the stretching assembly is composed of a stretching head and a detachable stretching sleeve. When using the stretching head, the detachable stretching sleeve can be first inserted into the stretching head, and the two sets of limit members on the outer periphery of the detachable stretching sleeve are used to limit and dock with the limit groove on the top of the stretching head. After the detachable stretching sleeve is installed and docked with the stretching head, the limit screw holes inside the detachable stretching sleeve and the limit screw holes on the outer periphery of the stretching head overlap and communicate with each other. At this time, the fixing bolts are threadedly installed in the limit screw holes inside the stretching head and the detachable stretching sleeve, and the stretching head and the detachable stretching sleeve are limited and reinforced by the fixing bolts. At this time, the stretching head can stretch the external bolts through the threaded engagement groove inside the detachable stretching sleeve. After wear and tear, the fixing bolts are removed, and the detachable stretching sleeve is taken out and replaced separately. At this time, the stretching head can be quickly reused, reducing the subsequent repair steps, thereby achieving the effect of improving the use efficiency.

[0014] (2) A stretching mechanism of a hydraulic bolt tensioner, wherein the detachable stretching sleeve is assembled with the inside of the stretching head. First, a fixing bolt can be threadedly connected with the inside of a limiting screw hole to limit and fix the stretching head and the detachable stretching sleeve to each other. At this time, when the stretching assembly is used, the external thread on the outer periphery of the reinforcement seat and the internal thread on the inner side of the upper end of the detachable stretching sleeve can be threadedly connected and fixed, and the stretching head can be supported and limited by a top piece. At this time, when the stretching head is hydraulically driven and pushed upward, the top piece can increase the supporting tension effect of the detachable stretching sleeve itself, thereby achieving the effect of improving the stretching support force of the detachable stretching sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the splitting of the stretching component of the utility model;

[0019] Figure 3 For this utility model Figure 1 A is an enlarged view of the middle image.

[0020] Legend:

[0021] 1. Stretching head; 2. Set groove; 3. Removable stretching sleeve; 4. Threaded engagement groove; 5. Limiting groove; 6. Limiting piece; 7. Limiting screw hole; 8. Fixing bolt; 9. External disassembly groove; 10. Top piece; 11. Reinforcement seat; 12. Internal thread; 13. External thread; 14. Stretching assembly. DETAILED DESCRIPTION

[0022] 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.

[0023] Embodiment: A hydraulic bolt tensioner tensioning mechanism, such as Figure 1-Figure 3As shown, the stretching assembly 14 is composed of a stretching head 1 and a detachable stretching sleeve 3. The stretching head 1 is provided with a sleeve groove 2. The detachable stretching sleeve 3 is installed and matched with the stretching head 1 through the sleeve groove 2 inside the stretching head 1. The inner side of the detachable stretching sleeve 3 is provided with a thread engagement groove 4 for engaging with the external bolt thread. The top of the stretching head 1 is provided with a limit groove 5 connected with the sleeve groove 2. Two sets of mirror-symmetrical limit members 6 are installed at the position corresponding to the limit groove 5 on the periphery of the detachable stretching sleeve 3. A limiting screw hole 7 penetrating the detachable stretching sleeve 3 is provided on the upper periphery of the stretching head 1, and a fixing bolt 8 for reinforcing the detachable stretching sleeve 3 is installed on the internal thread of the limiting screw hole 7. An external disassembly groove 9 for disassembling the stretching head 1 is provided on the upper periphery of the stretching head 1. A top piece 10 is provided on the top of the detachable stretching sleeve 3, and a reinforcement seat 11 is integrally formed with the bottom of the top piece 10. An internal thread 12 is provided on the inner wall of the upper end of the detachable stretching sleeve 3, and an external thread 13 matching the internal thread 12 is provided on the periphery of the reinforcement seat 11.

[0024] Furthermore, when the detachable stretching sleeve 3 is inserted into the sleeve groove 2 inside the stretching head 1 for installation, the limiting piece 6 on the periphery of the detachable stretching sleeve 3 is in a limiting clamping state with the limiting groove 5 on the top of the stretching head 1 .

[0025] Furthermore, the top member 10 is in threaded connection with the internal thread 12 on the inner side of the detachable stretch sleeve 3 through the external thread 13 on the outer periphery of the reinforcement seat 11 .

[0026] Furthermore, when the stretching head 1 is hydraulically pressed upward to stretch the external bolts through the detachable stretching sleeve 3, the detachable stretching sleeve 3 is located at the upper end of the stretching head 1 through the top piece 10 to limit and support the detachable stretching sleeve 3.

[0027] The working principle of this utility model:

[0028] The stretching assembly 14 is composed of a stretching head 1 and a detachable stretching sleeve 3. When the stretching head 1 is used, the detachable stretching sleeve 3 can be first inserted into the stretching head 1, and the two groups of limiting pieces 6 on the periphery of the detachable stretching sleeve 3 are limitedly connected with the limiting groove 5 on the top of the stretching head 1. After the detachable stretching sleeve 3 is installed and connected with the stretching head 1, the limiting screw holes 7 inside the detachable stretching sleeve 3 and the limiting screw holes 7 on the periphery of the stretching head 1 are overlapped and connected with each other. At this time, the fixing bolts 8 are threadedly installed with the limiting screw holes 7 inside the stretching head 1 and the detachable stretching sleeve 3, and the stretching head 1 and the detachable stretching sleeve 3 are limited and reinforced by the fixing bolts 8. At this time, the stretching The stretching head 1 can be used to stretch the external bolts through the threaded engagement groove 4 inside the detachable stretching sleeve 3, and the external thread 13 on the outer periphery of the reinforcement seat 11 at the bottom of the top piece 10 is threadedly connected and fixed with the internal thread 12 on the inner side of the upper end of the detachable stretching sleeve 3. The stretching head 1 is supported and limited by the top piece 10. At this time, when the stretching head 1 is hydraulically driven and pressed upward, the top piece 10 can increase the supporting tension effect of the detachable stretching sleeve 3 itself. After wear and tear, the fixing bolts 8 can be removed, and the detachable stretching sleeve 3 can be taken out separately and replaced. At this time, the stretching head 1 can be quickly reused, reducing the subsequent repair steps, thereby improving the use efficiency.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydraulic bolt tensioner tensioning mechanism, comprising a tensioning assembly (14), characterized in that: The stretching assembly (14) is composed of a stretching head (1) and a detachable stretching sleeve (3), the stretching head (1) is provided with a sleeve groove (2), the detachable stretching sleeve (3) is installed and matched with the stretching head (1) through the sleeve groove (2) inside the stretching head (1), the inner side of the detachable stretching sleeve (3) is provided with a thread engagement groove (4) for engaging with the external bolt thread, the upper periphery of the stretching head (1) is provided with a limiting screw hole (7) passing through the detachable stretching sleeve (3), the internal thread of the limiting screw hole (7) is installed with a fixing bolt (8) for reinforcing the detachable stretching sleeve (3), and the upper periphery of the stretching head (1) is provided with an external disassembly groove (9) for disassembling the stretching head (1).

2. A hydraulic bolt tensioner tensioning mechanism according to claim 1, characterized in that: The top of the stretching head (1) is provided with a limiting groove (5) which is connected to the sleeve groove (2), and two groups of mirror-symmetrical limiting members (6) are installed at positions corresponding to the limiting groove (5) on the periphery of the detachable stretching sleeve (3).

3. A hydraulic bolt tensioner tensioning mechanism according to claim 2, characterized in that: When the detachable stretch sleeve (3) is inserted into the sleeve groove (2) inside the stretch head (1) for installation, the limiting piece (6) on the periphery of the detachable stretch sleeve (3) is in a limiting snap-fitting state with the limiting groove (5) on the top of the stretch head (1).

4. A hydraulic bolt tensioner tensioning mechanism according to claim 3, characterized in that: The top of the detachable stretch sleeve (3) is provided with a top piece (10), the bottom of the top piece (10) is integrally formed with a reinforcement seat (11), the inner wall of the upper end of the detachable stretch sleeve (3) is provided with an internal thread (12), and the outer periphery of the reinforcement seat (11) is provided with an external thread (13) that matches the internal thread (12).

5. A hydraulic bolt tensioner tensioning mechanism according to claim 4, characterized in that: The top member (10) is in threaded connection with the internal thread (12) on the inner side of the detachable stretch sleeve (3) via the external thread (13) on the outer periphery of the reinforcement seat (11).

6. A hydraulic bolt tensioner tensioning mechanism according to claim 4, characterized in that: When the stretching head (1) is hydraulically pressed upward to stretch the external bolts through the detachable stretching sleeve (3), the detachable stretching sleeve (3) is located at the upper end of the stretching head (1) through the top piece (10) to limit the support state of the detachable stretching sleeve (3).

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