Comprehensive test bed for hydraulic torque wrench

Abstract

The utility model discloses a hydraulic torque wrench comprehensive test bench comprising a test work panel, the test work panel is provided with a torsional force detection assembly, and a torque sensor of the torsional force detection assembly is connected with the test work panel and a mounting sleeve through bolts. The transition head is connected with the sensor connecting flange through a transition spline, the test working panel is provided with a counter-force assembly in the radial direction of the torsional force detection assembly, the counter-force assembly comprises a frame, a clamp which is opened and closed along the guide mechanism is installed in the frame, and the movable end of the clamp is in linkage with the driving mechanism. And one end of the hydraulic torsion wrench is mounted with the torsion force detection assembly, and the other end of the hydraulic torsion wrench is clamped and limited in the clamp, so that hydraulic wrenches with different sizes can be clamped, and the applicability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic tool test detection, especially a hydraulic torque wrench comprehensive test bench. BACKGROUND

[0002] As the core power equipment of the hydroelectric generating set, the operation reliability of the hydraulic turbine directly affects the safety and stability of the power production. In order to ensure that the unit is in the best working condition for a long time, a whole life cycle management system including regular maintenance, daily maintenance and performance detection needs to be established. Among them, the hydraulic torque wrench, as a key maintenance equipment, plays an important role in high-precision pre-tightening force control in large parts disassembly and assembly operations. Statistics show that the unplanned shutdown accidents caused by the misalignment of bolt pre-tightening force account for about 23% of the total amount of hydroelectric unit failures, and the importance of performance detection of torque control equipment.

[0003] In the prior art, only a few kinds of torque wrenches with similar bolt and nut specifications are detected, and the torque value detection capability range is too small, so the actual torque value often exceeds the detection range. This phenomenon directly causes inaccurate measurement of the torque value of the equipment, which is manifested as the continuous expansion of the deviation rate between the actual tensile force and the theoretical value under the same torque. More seriously, this hidden performance degradation cannot be identified in time through conventional appearance inspection, which may cause safety hazards such as insufficient bolt pre-tightening force.

[0004] In view of the above technical bottleneck, a special hydraulic torque wrench comprehensive test bench is constructed. As shown in the publication CN119469725A, the test bench should have the function of accurate torque measurement under the same pressure gradient, and by establishing a torque-pressure characteristic curve database, the quantitative evaluation of the degree of equipment performance degradation is realized. In addition, the system can also be applied to the verification of the torque of the running unit bolt, and by comparing the mechanical response of the standard torque wrench and the bolt to be detected, data support is provided for equipment life extension evaluation. This double detection mechanism will effectively improve the quality control level of the hydroelectric unit maintenance operation, and has important engineering value for preventing major mechanical failures.

[0005] However, the following problems exist in the above experimental process:

[0006] 1. The adaptability of the reaction force device is poor for different types or sizes of hydraulic torque wrenches, and the fixing effect is not good;

[0007] 2. The device lacks detection means for the force reaction of the force arm. UTILITY MODEL CONTENTS

[0008] The utility model provides a kind of hydraulic torque wrench comprehensive test bench, to solve the poor applicability of counterforce device, the poor fixing effect of existing torque wrench test bench for different types or sizes of hydraulic torque wrench, the lack of detection means of the force reaction situation of force arm of device.

[0009] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0010] A kind of hydraulic torque wrench comprehensive test bench, including test work panel, the test work panel is equipped with torsional force detection component, the torque sensor of torsional force detection component is connected by bolt with test work panel and installation sleeve pipe, transition head is connected with sensor connection flange by transition spline, the test work panel is equipped with counterforce component in the radial direction of torsional force detection component, the counterforce component includes frame, clamp is installed in frame and is opened and closed along guide mechanism, the movable end of clamp is linked with drive mechanism, one end of hydraulic torsion wrench is installed with torsional force detection component, the other end of hydraulic torsion wrench is clamped in clamp.

[0011] As preferably, the frame is back-shaped frame, installation hole is equipped in the middle of frame, and the middle axis of installation hole is parallel to the radial direction of torsional force detection component.

[0012] As more preferably, the clamp includes two concave clamping blocks oppositely arranged in vertical direction, the openings of two concave clamping blocks oppositely form clamping groove, the opening of one concave clamping block is fixed to the bottom of installation hole upward, the protruding top of both ends of fixed concave clamping block is equipped with vertical guide mechanism, the other concave clamping block is located directly above fixed concave clamping block, the protruding both ends of upper concave clamping block are penetrated by corresponding guide mechanism, and upper concave clamping block is linked with drive mechanism.

[0013] Further, the middle axis of concave clamping block is parallel to the middle axis of installation hole.

[0014] Further, the drive mechanism includes vertically arranged rotating rod, the rotating rod is equipped with first threaded part, one end of rotating rod is equipped with rotating handle, the other end of rotating rod is penetrated from the top of frame to the middle position of top of upper concave clamping block in installation hole through bearing and rotates, and rotating rod is threadedly connected with frame.

[0015] Specifically, the guide mechanism includes vertically arranged guide rod, after upper concave clamping block is penetrated by guide rod, it slides along guide rod axially.

[0016] More specifically, the lower half of guide rod is equipped with second threaded part, the penetration of upper concave clamping block by guide rod is equipped with screw nut, and upper concave clamping block is screw-nut cooperated with corresponding second threaded part through screw nut.

[0017] As preferably, the frame is provided with several adjustable pressure detection components around the mounting hole on the side close to the torsion force detection component, and the sensing ends of the pressure detection components are all in sensing cooperation with the end of the hydraulic torque wrench close to the clamp.

[0018] As more preferably, the pressure detection components are at least four, arranged in a cross shape and with the sensing ends all pointing to the hydraulic torque wrench, respectively located at the upper, lower, left and right ends of the hydraulic torque wrench and the sensing ends are perpendicular to the corresponding end of the hydraulic torque wrench.

[0019] Further, the pressure detection components all include a metal mounting boss provided on the frame on the side close to the torsion force detection component, the metal mounting boss is provided with a sensor magnetic mounting seat magnetically mounted on the side close to the torsion force detection component, and the sensor magnetic mounting seat is provided with a pressure sensor adjustably mounted therein.

[0020] The utility model discloses the beneficial effects of:

[0021] A kind of hydraulic torque wrench comprehensive test bench is provided, and the clamp can be adjusted to be fastened for different hydraulic wrenches by adjustable clamp, more extensive in use, increase applicability;

[0022] After the wrench force arm is fixed, the pressure detection component can be added to measure the force arm stress condition, to solve the existing measurement without reaction analysis of force arm. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 It is one side appearance schematic view of the utility model;

[0024] Fig. 2 It is another side appearance schematic view of the utility model;

[0025] Fig. 3 It is hydraulic torque wrench test bench torque sensor arrangement schematic view of the utility model;

[0026] Fig. 4 It is clamp place amplification schematic view of the utility model;

[0027] In the drawing: 1, test work panel;

[0028] 2, torsion force detection component;21, transition head;22, transition spline;23, sensor connecting flange;24, torque sensor;25, mounting sleeve;

[0029] 3, counterforce component;

[0030] 31, clamp;311, concave clamping block;312, clamping groove;

[0031] 32. Drive mechanism; 321. Rotating rod; 322. First threaded part; 323. Rotating handle; 324. Bearing;

[0032] 33. Guide mechanism; 331. Guide rod; 332. Second threaded part; 333. Lead screw nut;

[0033] 34. Frame; 341. Mounting holes;

[0034] 4. Pressure detection assembly; 41. Metal mounting boss; 42. Magnetic sensor mounting base; 43. Pressure sensor. Detailed Implementation

[0035] The embodiments will be further described below with reference to the accompanying drawings.

[0036] like Figs. 1-4 As shown in the preferred embodiment, a hydraulic torque wrench integrated test bench includes a test work panel 1. The test work panel 1 is provided with a torque force detection component 2. The torque sensor 24 of the torque force detection component 2 is connected to the test work panel 1 and the mounting sleeve 25 by bolts. The transition head 21 is connected to the sensor connection flange 23 by the transition spline 22. The test work panel 1 is provided with a reaction force component 3 in the radial direction of the torque force detection component 2. The reaction force component 3 includes a frame 34. A clamp 31 that opens and closes along the guide mechanism 33 is installed in the frame 34. The movable end of the clamp 31 is linked with the drive mechanism 32. One end of the hydraulic torque wrench is installed with the torque force detection component 2, and the other end of the hydraulic torque wrench is clamped and limited in the clamp 31.

[0037] First, it is necessary to determine the maximum torque value of the wrench to be tested and select the corresponding working position on the torque wrench test working panel 21.

[0038] Next, determine the square drive size of the wrench. You can select the corresponding transition head 23. In particular, the transition head 23 can not only convert the inner hole square drive size, but its outer ring is designed in a hexagonal square shape, so it can also be used for the conversion of the central control wrench. Therefore, if the hydraulic wrench is a hollow wrench, it can also be converted in size through different transition heads 23, which is flexible in configuration.

[0039] After the wrench is placed, the wrench arm is embedded in the frame 34 of the reaction component 3 on the torque wrench test work panel 21. The clamp 31 is driven to close along the guide mechanism 33 by the rotary drive mechanism 32, and finally the wrench arm is clamped. After connecting the oil pipe and starting the electric hydraulic pump, the actual torque value output by the hydraulic wrench under the current pressure can be measured and a chart output can be generated on the data panel.

[0040] The frame 34 is a back-shaped frame, and a mounting hole 341 is arranged in the middle of the frame 34, and the middle axis of the mounting hole 341 is parallel to the radial direction of the torsion force detection assembly 2. The clamping effect is ensured not to conflict with the placement of the wrench.

[0041] The clamp 31 includes two concave clamping blocks 311 arranged opposite in the vertical direction, and the openings of the two concave clamping blocks 311 are opposite to form a clamping groove 312. One of the concave clamping blocks 311 is fixed upwardly on the bottom of the mounting hole 341, and the protruding ends of the fixed concave clamping block 311 are provided with vertical guide mechanisms 33 on the top. The other concave clamping block 311 is located directly above the fixed concave clamping block 311, and the protruding ends of the upper concave clamping block 311 are penetrated by the corresponding guide mechanisms 33, and the upper concave clamping block 311 is connected with the driving mechanism 32. First, the one end of the wrench force arm is placed in the clamping groove 312 of the fixed concave clamping block 311, and then the upper concave clamping block 311 is controlled to translate along the guide mechanism 33 by the driving mechanism 32 until the clamping groove 312 of the upper concave clamping block 311 clamps the wrench force arm together with the clamping groove 312 of the fixed concave clamping block 311.

[0042] The middle axis of the concave clamping block 311 is parallel to the middle axis of the mounting hole 341. The clamping effect is ensured not to conflict with the placement of the wrench.

[0043] The driving mechanism 32 includes a vertical rotating rod 321, and the rotating rod 321 is provided with a first threaded part 322. One end of the rotating rod 321 is provided with a rotating handle 323, and the other end of the rotating rod 321 is penetrated into the mounting hole 341 from the top of the frame 34 and is rotationally connected with the middle position of the top of the upper concave clamping block 311 through a bearing 324, and the rotating rod 321 is threadedly connected with the frame 34. Rotating the rotating rod 321, under the threaded connection, the rotating rod 321 is axially displaced, thereby driving the synchronous movement of the upper concave clamping block 311, and the rotating rod 321 is limited to keep pressing.

[0044] The guide mechanism 33 includes a vertical guide rod 331, and the upper concave clamping block 311 is penetrated by the guide rod 331 and axially slides along the guide rod 331. The upper concave clamping block 311 is ensured to slide along the guide rod 331.

[0045] The lower half of the guide rod 331 is provided with a second threaded part 332, and the position where the upper concave clamping block 311 is penetrated by the guide rod 331 is provided with a lead screw nut 333, and the upper concave clamping block 311 is connected with the corresponding second threaded part 332 through the lead screw nut 333 to form a lead screw connection. The range of sliding is further limited, and the stability and smoothness of displacement are ensured through the lead screw connection.

[0046] As a preferred embodiment 2, the frame 34 is provided with a plurality of adjustable pressure detection components 4 around the mounting hole 341 on one side of the torsion force detection assembly 2, and the sensing end of the pressure detection component 4 is in sensing cooperation with the end of the hydraulic torque wrench close to the clamp 31.

[0047] The pressure detection component 4 is at least four, arranged in a cross shape and the sensing end is directed to the hydraulic torque wrench, respectively located at the upper, lower, left and right ends of the hydraulic torque wrench and the sensing end is perpendicular to the corresponding end of the hydraulic torque wrench. After fixing the wrench force arm, the pressure detection component 4 can be added to measure the force condition of the force arm, and the existing measurement without analyzing the reaction of the force arm is solved.

[0048] The pressure detection component 4 comprises a metal mounting boss 41 provided on one side of the frame 34 close to the torsion force detection assembly 2, a sensor magnetic mounting seat 42 is magnetically mounted on one side of the metal mounting boss 41 close to the torsion force detection assembly 2, and a pressure sensor 43 is adjustably mounted in the sensor magnetic mounting seat 42. The sensor magnetic mounting seat 42 facilitates the overall installation, and the pressure sensor 43 is adjustably mounted in the sensor magnetic mounting seat 42, so that the pressure sensor 43 can be installed at a suitable position, and the sensing end of the pressure sensor 43 can contact the wrench force arm for best.

[0049] The working principle of the utility model:

[0050] Firstly, the maximum torque value of the tested wrench is determined, and the corresponding working position on the torque wrench test working panel 21 is selected;

[0051] Then the square drive size of the wrench is determined, and the corresponding transition head 23 can be selected. In particular, the transition head 23 can not only convert the inner hole square drive size, but also can be applied to the conversion of the central control wrench. Therefore, if the hydraulic wrench is a hollow wrench, the size can also be converted by different transition heads 23, and the configuration is flexible.

[0052] After placing the wrench, the wrench force arm is embedded in the frame 34 of the counterforce assembly 3 on the torque wrench test working panel 21, the clamp 31 is driven to close along the guide mechanism 33 by the rotary drive mechanism 32, and finally the wrench force arm is clamped, the oil pipe is connected, the electric hydraulic pump is started, and the actual torque value of the hydraulic wrench under the current pressure can be measured. The clamp can be adjusted for different hydraulic wrenches to improve the applicability.

Claims

1. A hydraulic torque wrench integrated test bench, comprising a test work panel (1), wherein a torque force detection assembly (2) is provided on the test work panel (1), a torque sensor (24) of the torque force detection assembly (2) is connected to the test work panel (1) and a mounting sleeve (25) by bolts, and a transition head (21) is connected to the sensor connection flange (23) by a transition spline (22), characterized in that, The test work panel (1) is provided with a counterforce assembly (3) in the radial direction of the torsion force detection assembly (2), the counterforce assembly (3) comprises a frame (34), a clamp (31) is installed in the frame (34) and opens and closes along a guide mechanism (33), the movable end of the clamp (31) is linked with a driving mechanism (32), one end of a hydraulic torsion wrench is installed with the torsion force detection assembly (2), and the other end of the hydraulic torsion wrench is clamped in the clamp (31).

2. The hydraulic torque wrench integrated test bench according to claim 1, characterized in that, The frame (34) is a back-shaped frame, a mounting hole (341) is arranged in the middle of the frame (34), and the middle shaft of the mounting hole (341) is parallel to the radial direction of the torsion force detection assembly (2).

3. The hydraulic torque wrench integrated test bench according to claim 2, characterized in that, The clamp (31) comprises two concave clamping blocks (311) arranged in a vertical direction, the openings of the two concave clamping blocks (311) are opposite to form a clamping groove (312), one of the concave clamping blocks (311) is fixed to the bottom of the mounting hole (341) with the opening upward, the protruding top of the fixed concave clamping block (311) is provided with a vertical guide mechanism (33), and the other concave clamping block (311) is located directly above the fixed concave clamping block (311), the protruding ends of the upper concave clamping block (311) are penetrated by the corresponding guide mechanism (33), and the upper concave clamping block (311) is linked with the driving mechanism (32).

4. The hydraulic torque wrench integrated test bench according to claim 3, characterized in that, The middle shaft of the concave clamping block (311) is parallel to the middle shaft of the mounting hole (341).

5. The hydraulic torque wrench integrated test bench according to claim 4, characterized in that, The driving mechanism (32) comprises a vertical rotating rod (321), the rotating rod (321) is provided with a first threaded part (322), one end of the rotating rod (321) is provided with a rotating handle (323), the other end of the rotating rod (321) penetrates from the top of the frame (34) to the inside of the mounting hole (341) and is rotatably connected to the middle position of the top of the upper concave clamping block (311) through a bearing (324), and the rotating rod (321) is threadedly connected with the frame (34).

6. The hydraulic torque wrench integrated test bench of claim 5, wherein, The guide mechanism (33) comprises a vertical guide rod (331), and the upper concave clamping block (311) slides along the guide rod (331) after being penetrated by the guide rod (331).

7. The hydraulic torque wrench integrated test bench of claim 6, wherein, The lower half of the guide rod (331) is provided with a second threaded part (332), the penetration position of the upper concave clamping block (311) by the guide rod (331) is provided with a lead screw nut (333), and the upper concave clamping block (311) is threadedly connected with the corresponding second threaded part (332) through the lead screw nut (333).

8. The hydraulic torque wrench comprehensive test bench according to any one of claims 1-7, characterized in that, A plurality of adjustable pressure detection assemblies (4) are arranged around the mounting hole (341) on the side close to the torsion force detection assembly (2) of the frame (34), and the sensing ends of the pressure detection assemblies (4) are in sensing cooperation with the end of the hydraulic torsion wrench close to the clamp (31).

9. The hydraulic torque wrench integrated test bench of claim 8, wherein, The pressure detection assemblies (4) are at least four, arranged in a cross shape and with the sensing ends all pointing to the hydraulic torsion wrench, respectively located at the upper, lower, left and right ends of the hydraulic torsion wrench and with the sensing ends perpendicular to the corresponding ends of the hydraulic torsion wrench.

10. The hydraulic torque wrench integrated test bench of claim 9, wherein, The pressure detection assembly (4) comprises a metal mounting boss (41) arranged on the frame (34) near one side of the torsional force detection assembly (2), the metal mounting boss (41) is magnetically attached with a sensor magnetic mounting seat (42) near one side of the torsional force detection assembly (2), and the pressure sensor (43) is adjustably arranged in the sensor magnetic mounting seat (42).

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