Bolt tensioner with protective structure

Abstract

The utility model relates to the technical field of bolt tensioners, and discloses a bolt tensioner with a protective structure, an anti-skid supporting seat is detachably arranged at the lower part of a pushing cylinder seat, and the anti-skid supporting seat adopts an embedded convenient-to-disassemble mounting structure, so that the anti-skid supporting seat can be flexibly replaced according to the condition of a supporting surface when in use; the working reliability and safety of the tensioner can be effectively improved through anti-skid supporting protection of the anti-skid supporting base, the split module type connecting screw bases are adopted, the connecting screw bases are movably installed in an embedded mode through the screw base inserting grooves, the connecting screw bases can be flexibly replaced and installed according to the sizes of bolts in the using process, and the service life of the tensioner is prolonged. The device can meet the stretching installation requirements of bolts of different sizes, the connecting screw base is embedded, clamped and limited through the limiting inserting column after being installed, the connecting screw base can freely rotate in the unlocking state, the pushing cylinder base does not need to be rotated when the connecting screw base and the bolts are fastened and installed, the connecting screw base can be independently screwed and fastened, and the operation convenience of the stretcher can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt stretcher technical field, specifically is a bolt stretcher with protection structure. BACKGROUND

[0002] Bolt stretcher is used for exerting the bolt to detect the locking force of bolt or the special equipment of locking nut, bolt stretcher is provided with the hydraulic source of hydraulic pressure pump, and the tensile force is decided according to the tensile strength, yield coefficient and elongation of material, and the pre-tightening and stretching of bolt connection are carried out by the stretching force generated by high-pressure oil pump, the axial force is applied to the installation of component, and the bolt is conveniently fastened and installed, the installation of bolt is stretched and fastened, and the fixed value fastening and disassembly can be realized, the stress distribution is uniform after installation, it is a safe, efficient and fast bolt disassembly auxiliary tool.

[0003] When carrying out bolt stretching work, the lower support structure of the stretcher has higher requirements due to the large required stretching force, and large slip pressure at the lower support during the stretching process will cause bolt fracture and personal injury, the support of the traditional stretcher is fixed, and it is difficult to meet the support requirements of various work surfaces during work, and the support stability and protection are poor, and the screw hole structure connected with the bolt of the existing stretcher is mostly fixed aperture, and the stretcher can only stretch the bolt of a specific size due to the limitation of the screw hole size, so the use is limited, therefore, the bolt stretcher with protection structure is provided. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a bolt stretcher with protection structure to solve the problems in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a bolt stretcher with protection structure, which comprises: a stretching top seat, a pushing cylinder seat, a connecting screw seat and an anti-skid support seat, the pushing cylinder seat is movably installed at the lower part of the stretching top seat under the drive of oil, the anti-skid support seat is detachably installed at the lower part of the pushing cylinder seat, and the bottom of the anti-skid support seat is provided with an anti-skid bottom pad.

[0006] The middle part of the stretching top seat is provided with a screw seat slot, the connecting screw seat is movably embedded and installed on the inner side of the screw seat slot, the middle part of the connecting screw seat is provided with a connecting screw hole, the outer circumferential side of the connecting screw seat and the inner circumferential side of the screw seat slot are both provided with semicircular grooves, the semicircular grooves on both sides form a limiting insertion hole when they coincide, and a limiting insertion column is inserted and installed in the limiting insertion hole.

[0007] Preferably, the aforementioned push cylinder seat and the oil cavity provided at the lower part of the tensioning top seat are slidably and enclosedly fitted together, and the upper part of the tensioning top seat is provided with an oil supply interface, which is connected to the oil cavity.

[0008] Preferably, the upper part of the aforementioned tension top seat is provided with a handle, which is flipped and installed on the upper part of the tension top seat.

[0009] Preferably, the aforementioned screw seat slot is opened through the middle of the tension top seat, the lower part of the screw seat slot is provided with a stepped ring seat, the connecting screw seat is fitted into the inner side of the screw seat slot, the lower part of the connecting screw seat abuts against the stepped ring seat, the connecting screw hole is opened through the middle of the connecting screw seat, and the top of the connecting screw seat is uniformly provided with fastening insertion holes in a circumferential shape.

[0010] Preferably, the two sets of semicircular grooves are evenly distributed in a circular shape on the periphery of the connecting screw seat and the screw seat slot. The two sets of semicircular grooves are not of equal number. The limiting posts are arranged in pairs. The bottom of the limiting posts is provided with a fastening screw head. After installation, the fastening screw head is fastened to the screw hole in the screw seat slot.

[0011] Preferably, the anti-slip base is fixedly installed on the bottom of the anti-slip support seat, and the upper part of the anti-slip support seat is provided with an annular groove, and the anti-slip support seat is fitted and installed with the lower part of the push cylinder seat through the annular groove.

[0012] Preferably, a positioning pin is fixed inside the annular groove, and a positioning hole is provided at the lower part of the push cylinder seat. The positioning pin and the positioning hole are evenly distributed in a circumferential shape. After installation, the positioning pin and the positioning hole are aligned and inserted. A fastening through groove is provided on the lower circumference of the push cylinder seat.

[0013] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects:

[0014] This bolt tensioner features an anti-slip support at the lower support of the push cylinder seat. The anti-slip support employs a snap-fit, easily removable installation structure, allowing for flexible replacement based on the support surface conditions. This anti-slip support effectively improves the tensioner's reliability and safety. Furthermore, it utilizes a modular connecting screw seat, with a slot for easy fitting and installation. The connecting screw seat can be flexibly replaced according to bolt size, accommodating the tensioning needs of bolts of different dimensions. After installation, the connecting screw seat is secured by a limiting pin. In the unlocked state, the connecting screw seat can rotate freely. When tightening the bolt, there is no need to rotate the push cylinder seat; the connecting screw seat can be independently tightened, making operation convenient and labor-saving, effectively improving the tensioner's ease of use. Attached Figure Description

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor based on these drawings.

[0016] Figure 1 It is a whole upside three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is a whole downside three-dimensional structure schematic diagram of the utility model;

[0018] Figure 3 It is a limiting column mounting structure schematic diagram of the utility model;

[0019] Figure 4 It is a limiting column mounting structure schematic diagram of the utility model; Figure 3 A region structure schematic diagram of the utility model;

[0020] Figure 5 It is a whole split upside structure schematic diagram of the utility model;

[0021] Figure 6 It is a whole split downside structure schematic diagram of the utility model.

[0022] The figure mark explanation: 1, the stretch top seat; 2, the push jar base; 3, the connection screw seat; 4, the antiskid support seat; 5, the screw seat slot; 6, the limiting column; 7, the limiting hole; 8, the connection screw hole; 9, the fastening hole; 10, the oil supply interface; 11, the handle; 12, the positioning column; 13, the positioning hole; 14, the antiskid bottom pad; 15, the fastening slot. Specific implementation

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments only represent some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] It is to be understood that the structure, proportion, size and the like shown in the drawings of the present specification are only used to cooperate with the disclosed content, to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose of the present application, should still fall within the scope of the disclosed technical content.

[0025] Embodiment

[0026] Please refer to Figures 1-6 The utility model provides a technical scheme: a bolt stretcher with a protection structure, comprising: a stretching top seat 1, a pushing cylinder seat 2, a connecting screw seat 3 and an antiskid support seat 4, as shown in the accompanying Figure 1 , the pushing cylinder seat 2 is slidably closed and embeddedly installed with the oil cavity arranged in the lower part of the stretching top seat 1, forming a lifting oil cylinder structure, and the pushing cylinder seat 2 is movably installed in the lower part of the stretching top seat 1 under the driving of oil, which can provide driving force for bolt stretching. In order to facilitate the connection and installation of the high-pressure oil pipe, an oil supply interface 10 is arranged on the upper part of the stretching top seat 1, and the oil supply interface 10 is connected with the oil cavity. In order to facilitate the overall carrying and moving of the device, a handle 11 is arranged on the upper part of the stretching top seat 1, and the handle 11 is reversibly installed on the upper part of the stretching top seat 1. During use, the handle 11 can be deflected and stored by reversing.

[0027] The antiskid support seat 4 is used for antiskid support and reinforcement of the device, as shown in the accompanying Figure 5 , in order to facilitate the connection and installation of the lower part of the pushing cylinder seat 2, an annular embedding groove is arranged on the upper part of the antiskid support seat 4, and the antiskid support seat 4 is embeddedly installed with the lower part of the pushing cylinder seat 2 through the annular embedding groove. The antiskid support seat 4 can be detachably installed on the lower part of the pushing cylinder seat 2. The embedded installation structure is used, and the antiskid support seat 4 can be flexibly replaced according to the support surface during use. The antiskid support and protection of the antiskid support seat 4 can effectively improve the working reliability and safety of the stretcher. In order to axially rotate and limit the antiskid support seat 4, as shown in the accompanying Figure 6 , a positioning plug column 12 is fixed in the annular embedding groove, and the lower part of the pushing cylinder seat 2 is provided with a positioning plug hole 13. The positioning plug column 12 and the positioning plug hole 13 are both circumferentially and uniformly distributed. After installation, the positioning plug column 12 is inserted into the positioning plug hole 13. In order to improve the support stability of the antiskid support seat 4, an antiskid bottom pad 14 is arranged on the bottom of the antiskid support seat 4. The antiskid bottom pad 14 can be made of rubber material, and is fixedly installed on the bottom of the antiskid support seat 4, which can increase the contact friction force between the device and the support surface. In order to facilitate the nut fastening operation, a fastening groove 15 is arranged on the lower part of the pushing cylinder seat 2.

[0028] In order to facilitate the connection and installation of the connecting screw seat 3, as shown in the accompanyingFigure 5 As shown, the middle part of the stretching top base 1 is provided with a screw seat slot 5, which is throughly arranged in the middle part of the stretching top base 1, and the lower part of the screw seat slot 5 is provided with a stepped ring seat. The connecting screw seat 3 is embedded and inserted into the inner side of the screw seat slot 5, and the lower part of the connecting screw seat 3 is in contact with the stepped ring seat to achieve jacking support. The connecting screw seat 3 is a split module, and the connecting screw seat 3 is movably embedded and installed in the screw seat slot 5. During use, the connecting screw seat 3 can be flexibly dressed according to the size of the bolt, so that the device can meet the stretching installation requirements of bolts of different sizes. In order to facilitate connection and installation with the bolt, a connecting screw hole 8 is arranged in the middle part of the connecting screw seat 3, which is throughly arranged in the middle part of the connecting screw seat 3. After installation with the bolt, the bolt can be driven to move upward synchronously.

[0029] In order to limit the axial rotation of the installed connecting screw seat 3, as shown in the accompanying drawings, Figure 4 As shown, the outer periphery of the connecting screw seat 3 and the inner periphery of the screw seat slot 5 are both provided with semicircular grooves. Two groups of semicircular grooves are evenly arranged on the periphery of the connecting screw seat 3 and the screw seat slot 5 in a circular manner. The two groups of semicircular grooves are arranged in different numbers. Specifically, the number of semicircular grooves on the outer periphery of the connecting screw seat 3 is six, and the number of semicircular grooves on the inner periphery of the screw seat slot 5 is two. When they coincide, the semicircular grooves on both sides form a limiting insertion hole 7. The limiting insertion column 6 is arranged in pairs. After installation, the limiting insertion column 6 is inserted and installed in the inner side of the limiting insertion hole 7. After the installation of the connecting screw seat 3, the limiting insertion column 6 is embedded and clamped to limit the rotation of the connecting screw seat 3. In the unlocked state, the connecting screw seat 3 can rotate freely, and when the bolt is tightly installed, the jacking cylinder seat 2 does not need to be rotated. The connecting screw seat 3 can be independently tightened and rotated, which is convenient and labor-saving. It can effectively improve the operation convenience of the stretcher. In order to facilitate the rotation and driving of the connecting screw seat 3, a fastening insertion hole 9 is evenly arranged on the top of the connecting screw seat 3 in a circular manner. In order to tightly limit the installed limiting insertion column 6, a fastening screw head is arranged at the bottom of the limiting insertion column 6. After installation, the fastening screw head is tightly installed with the screw hole in the screw seat slot 5.

[0030] The working principle or structural principle is that when installing, the anti-skid support base 4 is selected according to the size and shape of the support surface at the stretching position, then the anti-skid support base 4 is installed at the lower part of the jacking cylinder base 2 through positioning and embedding, then the stretcher is installed as a whole outside the bolt, then the connecting screw base 3 is selected according to the size of the bolt, then the position of the stretcher is adjusted, the connecting screw base 3 is installed at the upper part of the bolt and embedded and inserted into the screw base slot 5 in the middle of the stretching top base 1, then the connecting screw base 3 is screwed and fastened through the convex column wrench tool, the stretching allowance is reserved, the two half-circle embedding slots are overlapped to form the positioning insertion hole 13 through screwing and positioning, then the two groups of positioning insertion columns 12 are embedded and inserted into the inner side of the positioning insertion hole 13 and screwed and fastened, the axial rotation installation of the connecting screw base 3 is limited through the positioning insertion column 12, then the oil pipe is connected and installed with the oil supply interface 10 at the upper part of the stretching top base 1, after completion, the jacking cylinder base 2 is driven to be jacked up through the oil liquid provided by the high-pressure oil pump, the stretching tension at the bolt installation position is completed through the upward pulling bolt, the nut at the upper part of the bolt is screwed and fastened in stages during the stretching process, the stretching work of the bolt is completed, and after the work is completed, only the oil pressure needs to be released and the limiting insertion column 6 is taken out, then the connecting screw base 3 at the upper part of the bolt is screwed and taken off, and the stretcher is recycled, and the recycling work is completed.

[0031] In conclusion, the bolt stretcher is provided with the anti-skid support base 4 at the lower support position of the jacking cylinder base 2, the anti-skid support base 4 adopts the embedded and detachable installation structure, the anti-skid support base 4 can be flexibly dressed according to the support surface during use, the working reliability and safety of the stretcher can be effectively improved through the anti-skid support and protection of the anti-skid support base 4, the connecting screw base 3 adopts the split module type, the connecting screw base 3 is movably embedded and installed through the screw base slot 5, the connecting screw base 3 can be flexibly dressed according to the size of the bolt during use, so that the device can meet the stretching installation requirements of bolts of different sizes, the connecting screw base 3 is embedded and clamped and limited through the limiting insertion column 6 after installation, the connecting screw base 3 can be freely rotated in the unlocked state, the jacking cylinder base 2 does not need to be rotated when the bolt is tightly installed, the connecting screw base 3 can be independently screwed and fastened, which is convenient and labor-saving, and the operation convenience of the stretcher can be effectively improved.

[0032] Those skilled in the art can understand that the features described in various embodiments and / or claims of the present application can be combined or / and combined, even if such combinations or combinations are not explicitly described in the present application. In particular, the features described in various embodiments and / or claims of the present application can be combined and / or combined without departing from the spirit and teachings of the present application. All these combinations and / or combinations fall within the scope of the present application.

Claims

1. A bolt tensioner having a guard structure, characterized by, The utility model relates to a stretch top seat (1), push jar base (2), connecting screw seat (3) and antiskid support seat (4), push jar base (2) is installed under the lower part of stretch top seat (1) under the drive of oil liquid, antiskid support seat (4) is detachably installed in the lower part of push jar base (2), the bottom of antiskid support seat (4) is provided with antiskid bottom pad (14), The middle part of the stretch top seat (1) is provided with a screw seat slot (5), the connecting screw seat (3) is movably embedded and installed in the inner side of the screw seat slot (5), the middle part of the connecting screw seat (3) is provided with a connecting screw hole (8), the outer peripheral side of the connecting screw seat (3) and the inner peripheral side of the screw seat slot (5) are both provided with semicircular grooves, when the two sides coincide, the semicircular grooves form a limiting insertion hole (7), and the limiting insertion hole (7) is internally inserted and installed with a limiting insertion column (6). The push jar base (2) is movably embedded and installed with the oil cavity provided in the lower part of the stretch top seat (1), and the upper part of the stretch top seat (1) is provided with an oil supply interface (10) in communication with the oil cavity.

2. The bolt tensioner with a protective structure according to claim 1, characterized in that: The upper part of the stretch top seat (1) is provided with a handle (11), and the handle (11) is reversely installed on the upper part of the stretch top seat (1).

3. The bolt tensioner with a protective structure according to claim 2, characterized in that: The screw seat slot (5) is provided in the middle part of the stretch top seat (1), the lower part of the screw seat slot (5) is provided with a stepped ring seat, the connecting screw seat (3) is embedded and inserted in the inner side of the screw seat slot (5), the lower part of the connecting screw seat (3) is in abutment with the stepped ring seat, the connecting screw hole (8) is provided in the middle part of the connecting screw seat (3), and the top of the connecting screw seat (3) is uniformly provided with fastening insertion holes (9) in a circumferential manner.

4. The bolt tensioner with a protective structure according to claim 1, characterized in that: Two groups of semicircular grooves are uniformly provided on the peripheral sides of the connecting screw seat (3) and the screw seat slot (5) in a circumferential manner, the two groups of semicircular grooves are not provided in equal numbers, the limiting insertion columns (6) are provided in pairs, the bottom of the limiting insertion column (6) is provided with a fastening screw head, and after installation, the fastening screw head is fastened and installed with the screw hole in the screw seat slot (5).

5. The bolt tensioner with a protective structure according to claim 4, characterized in that: The antiskid bottom pad (14) is fixedly installed on the bottom of the antiskid support seat (4), the upper part of the antiskid support seat (4) is provided with an annular embedding groove, and the antiskid support seat (4) is embedded and installed with the lower part of the push jar base (2) through the annular embedding groove.

6. The bolt tensioner with a protective structure according to claim 1, characterized in that: The annular embedding groove is internally fixed with a positioning insertion column (12), the lower part of the push jar base (2) is provided with a positioning insertion hole (13), the positioning insertion column (12) and the positioning insertion hole (13) are uniformly distributed in a circumferential manner, after installation, the positioning insertion column (12) is inserted and connected with the positioning insertion hole (13) in a positional relationship, and the lower part of the push jar base (2) is provided with a fastening through groove (15) on the peripheral side.

7. The bolt tensioner with a protective structure according to claim 6, characterized in that: ​

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