Experimental verification device for hydraulic bolt tensioner

By designing a hydraulic bolt tensioner experimental verification device with a protective cover and fixing components, the problem of lack of protection in the testing of hydraulic bolt tensioners was solved, and safety protection and accurate detection of bolt preload were achieved during the experiment.

CN223581261UActive Publication Date: 2025-11-21INNER MONGOLIA INST OF METROLOGY TESTING & RES +1
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Patent Information

Application Number
CN202423155197.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2025-11-21
Estimated Expiration
2034-12-20

AI Technical Summary

Technical Problem

Existing hydraulic bolt tensioners lack effective protective components during testing, which can cause harm to personnel and equipment upon breakage.

Method used

An experimental verification device for a hydraulic bolt tensioner was designed, including a protective cover, a fixing component, and a pressure sensor. The protective cover is stably fixed and easily disassembled through the cooperation of a return spring and a clamping plate, and the preload of the bolt is detected by the pressure sensor.

Benefits of technology

This technology effectively protects the hydraulic bolt tensioner during experiments, preventing harm to personnel and equipment. It also enables precise detection of bolt preload, improving the safety and accuracy of the test.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a hydraulic bolt tensioner experimental verification device, which comprises a working table, a protective cover, a fixing assembly, a bolt body and an outer ring sleeve, the protective cover is arranged at the upper end of the working table, the bolt body and the outer ring sleeve are arranged in the protective cover, two symmetrical fixing grooves are formed in two sides of the interior of the working table, and the fixing assembly is arranged in the fixing grooves. Fixing plates are fixedly connected to the two sides of the bottom of the protective cover, the fixing assembly is arranged on the inner wall of one side of the fixing groove, the fixing assembly comprises a clamping plate and a reset spring, a clamping groove is formed in the fixing plate, and the protective cover is provided with an observation window. According to the protective cover, the arranged reset spring can drive the clamping plate to do reset motion, so that the clamping plate is clamped in the clamping groove, the fixing plate can be fixed in the fixing groove, the stability of the protective cover is guaranteed, the protective effect is achieved, and workers can use the protective cover conveniently.
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Description

TECHNICAL FIELD

[0001] The utility model relates to liquid pressure test station technical field, concretely is a kind of hydraulic bolt stretcher experimental verification device. BACKGROUND

[0002] Generally, bolt connection mode is widely applied in many fields, such as petroleum chemical industry, nuclear power, wind power, metallurgy, mine and other industries equipment installation or maintenance. The reliability of bolt connection is directly related to the service life and safety of equipment, however, relying on original torque conversion calculation pretightening force cannot meet the requirement of bolt test accuracy. Therefore, it is necessary to reasonably control bolt pretightening force.

[0003] At present, bolt stretcher is generally used to test hydraulic bolt pretightening force, and the parameters of bolt stretcher are periodically experimentally verified. However, when testing hydraulic bolt stretcher, there is no good protection assembly, if hydraulic bolt stretcher experiment breaks during testing, it will cause harm to surrounding personnel and equipment, and the consequence is unpredictable. UTILITY MODEL CONTENT

[0004] In view of the problems in the related art, the utility model provides a kind of hydraulic bolt stretcher experimental verification device to overcome the above technical problems existing in the prior art.

[0005] Therefore, the specific technical scheme adopted by the utility model is as follows:

[0006] A kind of hydraulic bolt stretcher experimental verification device, including workbench, protective cover, fixed component, bolt body, outer ring cover, the protective cover is located at the upper end of workbench, the bolt body and outer ring cover are set inside protective cover, two symmetrical fixed slots are set in the both sides of workbench interior, the fixed plate is fixedly connected on the both sides of the bottom of protective cover, the fixed component is located in the inner wall of one side of fixed slot, the fixed component includes clamping plate and reset spring, the inside of fixed plate is provided with clamping groove, the protective cover is provided with observation window.

[0007] The further improvement of the technical scheme of the utility model is that: the inner wall of one side of fixed slot is provided with the sliding slot that is communicated with the side wall of workbench, the clamping plate is slidably connected in the inside of sliding slot, the clamping plate and clamping groove are matched.

[0008] The further improvement of the technical scheme of the utility model is that: the both sides of workbench are fixedly connected with support block, the inside of support block is provided with movable slot, one end of clamping plate is fixedly connected with limit plate, the limit plate is slidably connected with the inner wall of movable slot.

[0009] Adopting the technical scheme, the limiting plate can limit the clamping plate, so that the clamping plate cannot be separated from the sliding groove.

[0010] Further improvement of the technical scheme of the utility model lies in that the reset spring is fixedly connected to one end of the limiting plate away from the clamping plate, one end of the reset spring away from the limiting plate is fixedly connected to the inner wall of the movable groove, and the one end of the limiting plate away from the clamping plate is fixedly connected with a pull rod.

[0011] Adopting the technical scheme, the reset spring can drive the clamping plate to reset, so that the clamping plate is clamped in the clamping groove, and thus the fixing plate can be fixed in the fixing groove, thereby ensuring the stability of the protective cover.

[0012] Further improvement of the technical scheme of the utility model lies in that the one end of the clamping plate away from the limiting plate is provided with a second inclined surface, and the bottom of the fixing plate is provided with a first inclined surface.

[0013] Adopting the technical scheme, the first inclined surface and the second inclined surface are used for mutual friction, so that the clamping plate slides in the sliding groove under the frictional thrust, and thus the fixing plate can slide into the fixing groove.

[0014] Further improvement of the technical scheme of the utility model lies in that the bolt body is arranged in the inside of the workbench, the outer wall of the bolt body is provided with a nut body, the bottom of the workbench is fixedly connected with a pressure plate, a plurality of pressure sensors are arranged in the pressure plate, the number of the nut bodies is two, and the two nut bodies are arranged at the bottom of the pressure plate and the upper surface of the workbench respectively, and the front end of the workbench is fixedly connected with a display screen matched with the pressure sensors.

[0015] Adopting the technical scheme, the nut body is arranged at the bottom of the pressure plate, and when the bolt body is stretched, the nut body at the bottom of the pressure plate moves upward to exert pressure on the pressure plate, so that the pressure sensor detects the pressure and displays the data on the display screen.

[0016] Further improvement of the technical scheme of the utility model lies in that the inside of the outer ring sleeve is provided with a nut sleeve, the inside of the outer ring sleeve is provided with an annular oil conveying groove, one side of the outer ring sleeve is fixedly connected with an oil inlet measuring pipe opening, the rear end of the protective cover is provided with a slot, and the oil inlet measuring pipe opening and the annular oil conveying groove are connected through a through slot.

[0017] Adopting the technical scheme, the slot and the oil inlet measuring pipe opening are matched.

[0018] The further improvement of the technical scheme of the utility model lies in that the inside of the annular oil conveying groove is equipped with a jacking ring, the bottom end of the jacking ring is installed with a piston, and the jacking ring is connected with the inner wall of the annular oil conveying groove through the piston, and the upper end of the jacking ring is equipped with a bolt stretching sleeve.

[0019] The utility model discloses the beneficial effect that:

[0020] 1、Through setting up reset spring can drive the clamping plate to do reset movement, make the clamping plate carding in the inside of the card slot, so that the fixed plate can be fixed in the fixed slot inside, further guarantee the stability of the protective cover, thereby reach the effect of protection, and convenient for staff to use.

[0021] 2、Pull the pull rod to drive the clamping plate to separate from the card slot, the fixed plate and the fixed groove are loose at this time, the protective cover can be disassembled from the workbench, convenient for staff to operate. DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment, obviously, the drawing in the following description only is some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to these drawings.

[0023] Figure 1 It is the front view according to the utility model embodiment described;

[0024] Figure 2 It is the workbench bottom structure diagram according to the utility model embodiment described;

[0025] Figure 3 It is the protective cover structure diagram according to the utility model embodiment described;

[0026] Figure 4 It is the hydraulic bolt stretcher body internal structure diagram according to the utility model embodiment described.

[0027] In the drawing:

[0028] 1, workbench;101, fixed slot;102, support block;103, movable slot;2, protective cover;201, observation window;202, slot;203, fixed plate;204, card slot;205, first inclined plane;3, fixed assembly;301, clamping plate;302, second inclined plane;303, limit plate;304, reset spring;305, pull rod;4, pressure plate;5, display screen;6, bolt body;7, nut body;8, outer ring sleeve;801, through slot;802, annular oil conveying groove;9, nut sleeve;10, oil inlet measuring pipe mouth;11, jacking ring;12, bolt stretching sleeve. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0030] According to the embodiments of the utility model, a hydraulic bolt tensioner experimental verification device is provided.

[0031] Embodiment one;

[0032] As Figures 1-4 shown, according to the hydraulic bolt tensioner experimental verification device of the utility model embodiments, including workbench 1, protective cover 2, fixed assembly 3, bolt body 6, outer ring cover 8, protective cover 2 is located at the upper end of workbench 1, bolt body 6 and outer ring cover 8 are arranged inside protective cover 2, two symmetrical fixed grooves 101 are set in the both sides inside workbench 1, the both sides fixed plate 203 of the bottom of protective cover 2 are fixedly connected, fixed assembly 3 is located at the one side inner wall of fixed groove 101, fixed assembly 3 includes clamping plate 301 and reset spring 304, the inside of fixed plate 203 is provided with clamping groove 204, and protective cover 2 is provided with observation window 201.

[0033] In the embodiment, the reset spring 304 arranged can drive the reset motion of the clamping plate 301, so that the clamping plate 301 is clamped in the inside of the clamping groove 204, so that the fixed plate 203 can be fixed in the inside of the fixed groove 101, and the stability of the protective cover 2 is ensured, so that the effect of protection is achieved.

[0034] Embodiment two;

[0035] As Figures 1-4 shown, according to the hydraulic bolt tensioner experimental verification device of the utility model embodiments, the one side inner wall of fixed groove 101 is provided with the sliding slot communicated with the side wall of workbench 1, the clamping plate 301 is slidably connected in the inside of the sliding slot, the clamping plate 301 and the clamping groove 204 are adapted, and the both sides of workbench 1 are fixedly connected with support block 102, the inside of support block 102 is provided with movable slot 103, one end of clamping plate 301 is fixedly connected with limit plate 303, limit plate 303 is slidably connected with the inner wall of movable slot 103, reset spring 304 is fixedly connected with the end of limit plate 303 away from clamping plate 301, the end of reset spring 304 away from limit plate 303 is fixedly connected with the inner wall of movable slot 103, and the end of limit plate 303 away from clamping plate 301 is fixedly connected with pull rod 305.

[0036] In the embodiment, the limiting plate 303 can limit the clamping plate 301, so that the clamping plate 301 cannot be separated from the sliding groove, and the reset spring 304 can drive the clamping plate 301 to reset, so that the clamping plate 301 is clamped in the inside of the clamping groove 204, so that the fixing plate 203 can be fixed in the inside of the fixing groove 101, thereby ensuring the stability of the protective cover 2.

[0037] Embodiment three;

[0038] As Figures 1-4 shown, the hydraulic bolt stretcher experimental verification device according to the embodiment of the utility model, the second inclined plane 302 is arranged at the end of the clamping plate 301 away from the limiting plate 303, the first inclined plane 205 is arranged at the bottom of the fixing plate 203, the bolt body 6 is arranged in the inside of the workbench 1, the outer wall of the bolt body 6 is provided with the nut body 7, the bottom of the pressure plate 4 is fixedly connected with the workbench 1, a plurality of pressure sensors are arranged in the pressure plate 4, the number of the nut body 7 is two, and the nut body 7 is arranged at the bottom of the pressure plate 4 and the upper surface of the workbench 1 respectively, the front end of the workbench 1 is fixedly connected with the display screen 5 matched with the pressure sensor, the inside of the outer ring sleeve 8 is provided with the nut sleeve 9, the inside of the outer ring sleeve 8 is provided with the annular oil conveying groove 802, one side of the outer ring sleeve 8 is fixedly connected with the oil inlet measuring pipe opening 10, the rear end of the protective cover 2 is provided with the slot 202, the oil inlet measuring pipe opening 10 and the annular oil conveying groove 802 are connected through the through slot 801, the inside of the annular oil conveying groove 802 is provided with the lifting ring 11, the bottom end of the lifting ring 11 is provided with the piston, and the lifting ring 11 is connected with the inner wall of the annular oil conveying groove 802 through the piston, and the upper end of the lifting ring 11 is provided with the bolt stretching sleeve 12.

[0039] In the embodiment, the first inclined plane 205 and the second inclined plane 302 are used for mutual friction, so that the clamping plate 301 slides in the sliding groove under the frictional thrust, so that the fixing plate 203 can slide into the inside of the fixing groove 101, the nut body 7 is arranged at the bottom of the pressure plate 4, and when the bolt body 6 is stretched, the nut body 7 at the bottom of the pressure plate 4 moves upwards to apply pressure to the pressure plate 4, so that the pressure sensor detects the pressure and displays the data on the display screen 5, and the slot 202 and the oil inlet measuring pipe opening 10 are matched.

[0040] In order to facilitate the understanding of the above technical scheme of the utility model, the working principle or operation mode of the utility model in the actual process is described in detail.

[0041] In actual application, by inserting the fixed plate 203 into the inside of the fixed groove 101, the first inclined surface 205 and the second inclined surface 302 will rub against each other during the insertion process, so that the clamping plate 301 slides in the sliding groove under the frictional thrust and drives the return spring 304 to compress, when the fixed plate 203 is completely inserted into the inside of the fixed groove 101, the return spring 304 can drive the clamping plate 301 to reset, so that the clamping plate 301 is clamped in the inside of the clamping groove 204, so that the fixed plate 203 can be fixed in the inside of the fixed groove 101, that is, the installation of the protective cover 2 can be completed, then testing can be carried out, when disassembly is needed, the clamping plate 301 is pulled away from the clamping groove 204 by pulling the pull rod 305, at this time, the fixed plate 203 and the fixed groove 101 are loose, so that the protective cover 2 can be disassembled from the workbench 1.

[0042] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hydraulic bolt tensioner experimental verification device, comprising a workbench (1), a protective cover (2), a fixing assembly (3), a bolt body (6), and an outer ring sleeve (8), characterized in that, The protective cover (2) is located at the upper end of the workbench (1). The bolt body (6) and the outer ring sleeve (8) are located inside the protective cover (2). Two symmetrical fixing grooves (101) are opened on both sides inside the workbench (1). Fixing plates (203) are fixedly connected to both sides of the bottom of the protective cover (2). The fixing component (3) is located on one inner wall of the fixing groove (101). The fixing component (3) includes a card plate (301) and a return spring (304). The fixing plate (203) has a card groove (204) inside. The protective cover (2) is provided with an observation window (201).

2. The experimental verification device for a hydraulic bolt tensioner according to claim 1, characterized in that, The inner wall of one side of the fixed groove (101) is provided with a sliding groove that communicates with the side wall of the workbench (1). The card plate (301) is slidably connected to the inside of the sliding groove, and the card plate (301) and the card groove (204) are compatible.

3. The experimental verification device for a hydraulic bolt tensioner according to claim 2, characterized in that, Support blocks (102) are fixedly connected to both sides of the workbench (1). The support blocks (102) have movable grooves (103) inside. One end of the card plate (301) is fixedly connected to a limiting plate (303), and the limiting plate (303) is slidably connected to the inner wall of the movable groove (103).

4. The experimental verification device for a hydraulic bolt tensioner according to claim 3, characterized in that, The reset spring (304) is fixedly connected to the end of the limiting plate (303) away from the card plate (301), and the end of the reset spring (304) away from the limiting plate (303) is fixedly connected to the inner wall of the movable groove (103). The end of the limiting plate (303) away from the card plate (301) is fixedly connected to a pull rod (305).

5. The experimental verification device for a hydraulic bolt tensioner according to claim 4, characterized in that, The card plate (301) has a second inclined surface (302) at one end away from the limiting plate (303), and the bottom of the fixing plate (203) has a first inclined surface (205).

6. The experimental verification device for a hydraulic bolt tensioner according to claim 5, characterized in that, The bolt body (6) is located inside the workbench (1). The outer wall of the bolt body (6) is provided with a nut body (7). A pressure plate (4) is fixedly connected to the bottom of the workbench (1). Several pressure sensors are provided inside the pressure plate (4). There are two nut bodies (7), which are respectively located at the bottom of the pressure plate (4) and the upper surface of the workbench (1). A display screen (5) adapted to the pressure sensors is fixedly connected to the front end of the workbench (1).

7. The experimental verification device for a hydraulic bolt tensioner according to claim 6, characterized in that, The outer ring sleeve (8) is provided with a nut sleeve (9) inside. The outer ring sleeve (8) is provided with an annular oil delivery groove (802) inside. An oil inlet measuring port (10) is fixedly connected to one side of the outer ring sleeve (8). A slot (202) is provided at the rear end of the protective cover (2). The oil inlet measuring port (10) and the annular oil delivery groove (802) are connected through a through groove (801).

8. The experimental verification device for a hydraulic bolt tensioner according to claim 7, characterized in that, The annular oil delivery groove (802) is provided with a lifting ring (11) inside. A piston is installed at the bottom end of the lifting ring (11), and the lifting ring (11) is connected to the inner wall of the annular oil delivery groove (802) through the piston. A bolt tension sleeve (12) is provided at the upper end of the lifting ring (11).