Clamping and fixing device for tensile test of hoisting steel wire rope
By designing a clamping fixing device for tensile testing of wire rope including a base plate, a bracket plate, a locking block, an upper and lower clamping block and a locking screw, the problem of uneven clamping force in the prior art is solved, and the problem of uneven clamping force is realized Stable clamping of the wire rope ensures smooth progress of tensile resistance test and stability of results.
Patent Information
- Application Number
- CN202421316535.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-06-11
AI Technical Summary
In the existing tensile resistance test of wire ropes, the clamping force applied by the clamp is uneven, which can easily lead to the wire rope breaking at the clamping point, affecting the test results.
Design a clamping fixing device for tensile testing of lifting wire rope including bottom plate, bracket plate, locking block, upper clamping block, lower clamping block and locking screw, and clamping of upper and lower clamping blocks is realized through locking screw The clamping surface adopts a wavy concave and convex surface structure to increase static friction and increase contact area.
It effectively improves the contact area and static friction between the clamping block and the wire rope, reduces the compression damage to the wire rope, and ensures the smooth progress of the tensile resistance test and the stability of the results.
Smart Images
Figure CN222212470U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hoisting tools, in particular to a clamping and fixing device for hoisting steel wire rope tensile test. Background Art
[0002] Steel wire rope is a spiral steel wire bundle twisted together according to certain rules with steel wires that meet the requirements of mechanical properties and geometric dimensions. Steel wire rope is composed of steel wire, rope core and grease. Steel wire rope is first twisted into strands by multiple layers of steel wires, and then a certain number of strands are twisted into a spiral rope with the rope core as the center. It needs to withstand the action of alternating loads during use. The performance is mainly determined by the mechanical properties of the steel wire, the surface state of the steel wire and the structure of the wire rope. Steel wire materials include carbon steel or alloy steel, which are formed by cold drawing or cold rolling. The cross section of the steel wire is round or shaped. The shaped cross-section steel wire is mainly used for the production of sealed steel wire ropes. It has high tensile strength and toughness, and the steel wire is appropriately surface treated to meet the needs of different use environment conditions.
[0003] At present, steel wire ropes need to undergo tensile tests after production. During tensile tests, both ends of the steel wire ropes are generally clamped directly in the jaws of the testing machine. The clamps used at the jaws tend to apply a large clamping force to the steel wire rope, causing uneven force on the steel wire rope and making it easy for it to break at the clamping point, affecting the tensile test results and being unfavorable for conducting tensile tests. Utility Model Content
[0004] The technical problem to be solved by the utility model is: in view of the defects of the prior art, a clamping and fixing device for tensile test of hoisting steel wire rope is provided.
[0005] The utility model adopts the following technical solutions to solve the above technical problems:
[0006] A clamping and fixing device for tensile testing of a hoisting wire rope comprises a base plate, a bracket plate, a locking block, an upper clamping block, a lower clamping block and a locking screw, wherein: the bracket plate is fixedly mounted on the bottom of the base plate, and the locking block and the locking screw are movably arranged on the top thereof, and the lower end of the locking screw is abutted and connected with the locking block; the lower clamping block is fixedly arranged on the base plate below the upper clamping block.
[0007] Preferably, the bottom plate is a square plate structure, and mounting holes are respectively provided at the four corners thereof.
[0008] Preferably, the bracket plate is an inverted U-shaped structure, with two ends thereof being vertically arranged at two ends of the bottom plate, and the bracket plate and the bottom plate are an integrally welded structure.
[0009] More preferably, square limiting holes are respectively provided at the left and right ends of the top of the bracket plate, and a screw hole is provided in the middle.
[0010] Preferably, the locking block is a U-shaped structure, and its two ends are correspondingly installed in two square limiting holes on the top of the bracket plate.
[0011] Preferably, the upper clamping block is detachably mounted on the bottom of the locking block by means of screws, and the bottom thereof is configured as a first wavy concave-convex surface.
[0012] Preferably, the lower clamping block is detachably mounted on the bottom plate by means of screws, and the top of the lower clamping block is provided as a wavy second concave-convex surface, which is arranged in vertical correspondence with the first concave-convex surface above.
[0013] Preferably, the lower end of the locking screw is set as a threaded rod, which is threadedly installed in the screw hole on the top of the bracket plate, and the head thereof is provided with a hexagonal structure.
[0014] Preferably, the clamping and fixing device for tensile test of hoisting wire rope further comprises return springs respectively arranged on the left and right sides of the inner groove of the locking block, wherein:
[0015] The top end of the return spring is fixedly connected to the top of the bracket plate, and the lower end is fixedly connected to the locking block.
[0016] Preferably, the clamping and fixing device for tensile test of hoisting steel wire rope further comprises limit clamping seats respectively arranged at the front and rear ends of the lower clamping block, wherein:
[0017] The limit clamping seat is in a U-shaped structure as a whole, and the two ends of the bottom are detachably mounted on the bottom plate by screws.
[0018] The utility model adopts the above technical solution, and compared with the prior art, has the following technical effects:
[0019] The utility model provides a clamping and fixing device for tensile test of hoisting wire rope, which is mainly assembled from a base plate, a bracket plate, a locking block, an upper clamping block, a lower clamping block and a locking screw. The locking screw is used to clamp and separate the upper clamping block and the lower clamping block, thereby clamping and fixing the wire rope. The clamping surfaces of the upper clamping block and the lower clamping block both adopt a wavy concave-convex surface structure design, which can effectively increase the static friction between the upper and lower clamping blocks and the wire rope, and significantly increase the contact area between the clamping block and the wire rope, and reduce the compression damage to the wire rope. The clamping and fixing device has a novel and reasonable structural design, is simple and convenient to operate, has strong practicality, and has a stable and firm clamping effect, thereby ensuring the smooth progress of the tensile test of the wire rope. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a three-dimensional structure diagram of a clamping and fixing device for tensile test of hoisting wire ropes according to the utility model. Figure 1 ;
[0021] Figure 2 This is a three-dimensional structure diagram of a clamping and fixing device for tensile test of hoisting wire ropes according to the utility model. Figure 2 ;
[0022] Figure 3 It is a schematic diagram of the top view of the structure of a clamping and fixing device for tensile test of a hoisting steel wire rope according to the utility model;
[0023] Figure 4 This is a schematic diagram of the transverse cross-sectional structure of a clamping and fixing device for tensile testing of a hoisting steel wire rope according to the utility model;
[0024] Figure 5 It is a side view structural schematic diagram of a clamping and fixing device for tensile test of hoisting steel wire rope according to the utility model;
[0025] Figure 6 It is a longitudinal cross-sectional structural schematic diagram of a clamping and fixing device for tensile test of hoisting wire rope of the utility model;
[0026] Figure 7 This is a three-dimensional cross-sectional view of a clamping and fixing device for tensile testing of hoisting wire ropes according to the utility model. Figure 1 ;
[0027] Figure 8 This is a three-dimensional cross-sectional view of a clamping and fixing device for tensile testing of hoisting wire ropes according to the utility model. Figure 1 . DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0029] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.
[0030] In some embodiments, Figure 1 As shown, a clamping and fixing device for tensile test of lifting wire rope is provided, which mainly includes a base plate 10, a bracket plate 20, a locking block 30, an upper clamping block 40, a lower clamping block 50 and a locking screw 60. The base plate 10, the bracket plate 20, the locking block 30, the upper clamping block 40 and the lower clamping block 50 are all made of stainless steel or aluminum alloy, and the upper clamping block 40 and the lower clamping block 50 are flexibly installed on the locking block 30 and the base plate 10 in a detachable manner, which is convenient for replacement and maintenance.
[0031] Specifically, the bracket plate 20 is fixedly mounted on the bottom of the base plate 10, and the locking block 30 and the locking screw 60 are movably mounted on the top of the bracket plate 20, and the lower end of the locking screw 60 is abutted and connected with the locking block 30; the lower clamping block 50 is fixedly arranged on the base plate 10 below the upper clamping block 40. The controller can be moved up and down by rotating the locking screw 60, thereby pushing the locking block 30 to move downward, and then pushing the upper clamping block 40 to move downward, so as to clamp and fix the steel wire rope between the upper clamping block 40 and the lower clamping block 50.
[0032] In some of the embodiments, Figure 1 , Figure 2 and Figure 3 As shown, the bottom plate 10 is a square plate structure, which is made of steel plate. In order to facilitate the installation and fixation of the device, mounting holes 11 are respectively opened at the four corners of the bottom plate 10, and four screws are used to pass through the mounting holes 11 at the four corners to install the device on the tensile resistance device.
[0033] In some of the embodiments, Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, the bracket plate 20 is an inverted U-shaped structure, which is made of steel plate bending, and its two ends are vertically arranged at the two ends of the bottom plate 10, and are welded with the bottom plate 10 to form an integral structure, thereby ensuring the stability of the overall structure of the device.
[0034] In order to realize the movable installation of the locking block 30 and the locking screw 60, square limiting holes 21 are respectively opened at the left and right ends of the top of the bracket plate 20, and a screw hole 22 is opened in the middle. The locking block 30 is installed in the square limiting hole 21, and the locking screw 60 is installed in the screw hole 22.
[0035] In some of the embodiments, Figure 1 , Figure 6 , Figure 7 and Figure 8 As shown, the locking block 30 is used as a push rod mechanism to drive the upper clamping block 40 and the lower clamping block 50 to move toward each other and clamp. In order to ensure the stability of the upper clamping block 40 moving up and down, the locking block 30 adopts a U-shaped structure, and its two ends are correspondingly installed in the two square limiting holes 21 on the top of the bracket plate 20. The cross-section of the connecting arms at both ends of the locking block 30 is consistent with the shape of the square limiting holes 21, and can be stably installed in the square limiting holes 21 without shaking left and right in the square limiting holes 21.
[0036] In some of the embodiments, Figure 1 , Figure 2, Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, the upper clamping block 40 is a component that directly clamps and contacts the steel wire rope, and a suitable size of the upper clamping block 40 is selected according to the specifications of the steel wire rope to be tested. Therefore, in order to facilitate the installation, replacement and maintenance of the upper clamping block 40, the upper clamping block 40 is detachably mounted on the bottom of the locking block 30 by screws, and its bottom is set to a first wavy concave-convex surface.
[0037] Accordingly, the lower clamping block 50 is a component that directly clamps and contacts the steel wire rope, and a lower clamping block 50 of a suitable size is selected according to the specifications of the steel wire rope to be tested. Therefore, in order to facilitate the installation, replacement and maintenance of the lower clamping block 50, the lower clamping block 50 is detachably mounted on the bottom plate 10 by screws, and the top thereof is set to a second wavy concave-convex surface.
[0038] The first concave-convex surface of the bottom plate of the upper clamping block 40 and the second concave-convex surface on the top of the lower clamping block 50 are arranged in correspondence with each other up and down. The head end of the steel wire rope to be tested is clamped between the first concave-convex surface and the second concave-convex surface, which can have a sufficient contact area with the steel wire rope, effectively increasing the static friction between the upper and lower clamping blocks and the steel wire rope, and significantly improving the contact area between the clamping blocks and the steel wire rope, reducing the compression damage to the steel wire rope.
[0039] In some of the embodiments, Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the locking screw 60 serves as the driving force for clamping the large upper and lower clamping blocks, and the lower end is set as a threaded rod, which is threadedly installed in the screw hole 22 at the top of the bracket plate 20, and can achieve up and down movement through synchronous rotation.
[0040] The head of the locking screw 60 is provided with a hexagonal structure, so as to be convenient to use a wrench to manually tighten the locking screw 60. Of course, as required, as an alternative technical solution, a rotating handle can be provided at the head end of the locking screw 60, so as to manually rotate the locking screw 60.
[0041] In some of the embodiments, Figure 6 , Figure 7 and Figure 8As shown, the clamping and fixing device for tensile test of hoisting steel wire rope also includes reset springs 70 respectively arranged on the left and right sides of the inner groove of the locking block 30. The top of the reset spring 70 is fixedly connected to the top of the bracket plate 20, and the lower end is fixedly connected to the locking block 30. Through the reset springs 70 at the left and right ends, an upward force can always be applied to the locking block 30. When the locking screw 60 is rotated to move upward and disengage from the locking block 30, the locking block 30 can be pulled upward to release the steel wire rope.
[0042] In some of the embodiments, Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, the clamping and fixing device for tensile test of hoisting steel wire rope also includes a limit clamp 80 respectively arranged at the front and rear ends of the lower clamp block 50, and the limit clamp 80 is a U-shaped structure as a whole, and the two ends of the bottom are detachably mounted on the bottom plate 10 by screws. The limit clamp 80 plays a certain role in limiting the position of the steel wire rope to ensure that the steel wire rope is accurately placed between the upper clamp block 40 and the lower clamp block 50.
[0043] The use principle of the clamping and fixing device for tensile test of hoisting wire rope is as follows: Figure 1 and Figure 2 The clamping and fixing devices shown are respectively installed on the tensile resistance equipment, and the two ends of the tested wire rope are respectively limited and installed in the limit clamping seat 80, so that the wire rope is located at the midline position between the upper clamping block 40 and the lower clamping block 50. The locking screw 60 is manually rotated by a wrench and the upper clamping block 40 is simultaneously driven to move downward until the wire rope is fixedly clamped between the upper clamping block 40 and the lower clamping block 50, thereby completing the stable and firm clamping of the wire rope, ensuring the smooth progress of the tensile resistance test of the wire rope.
[0044] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;
[0045] Secondly, the drawings of the embodiments disclosed in the present utility model only involve structures related to the embodiments disclosed in the present utility model, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;
[0046] Finally, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A clamping and fixing device for tensile test of hoisting wire rope, characterized in that: It includes a base plate, a bracket plate, a locking block, an upper clamping block, a lower clamping block and a locking screw, wherein: the bracket plate is fixedly installed at the bottom of the base plate, and the locking block and the locking screw are movably arranged on the top, and the lower end of the locking screw is abutted and connected with the locking block; the lower clamping block is fixedly arranged on the base plate below the upper clamping block.
2. The clamping and fixing device for tensile test of hoisting wire rope according to claim 1 is characterized in that: The bottom plate is a square plate structure, and mounting holes are respectively provided at the four corners thereof.
3. The clamping and fixing device for tensile test of hoisting wire rope according to claim 1 is characterized in that: The bracket plate is an inverted U-shaped structure, two ends of which are vertically arranged at two ends of the bottom plate, and the bracket plate and the bottom plate are an integrally welded structure.
4. The clamping and fixing device for tensile test of hoisting wire rope according to claim 1 is characterized in that: The left and right ends of the top of the bracket plate are respectively provided with square limiting holes, and the middle position is provided with a screw hole.
5. The clamping and fixing device for tensile test of hoisting wire rope according to claim 1 is characterized in that: The locking block is a U-shaped structure, and its two ends are correspondingly installed in the two square limiting holes on the top of the bracket plate.
6. The clamping and fixing device for tensile test of hoisting wire rope according to claim 1 is characterized in that: The upper clamping block is detachably mounted on the bottom of the locking block by means of screws, and the bottom of the upper clamping block is configured as a first wavy concave-convex surface.
7. The clamping and fixing device for tensile test of hoisting wire rope according to claim 1 is characterized in that: The lower clamping block is detachably mounted on the bottom plate by means of screws, and the top of the lower clamping block is provided with a second wavy concave-convex surface, which is arranged in correspondence with the first concave-convex surface above.
8. The clamping and fixing device for tensile test of hoisting wire rope according to claim 1 is characterized in that: The lower end of the locking screw is arranged as a threaded rod, which is threadedly installed in the screw hole at the top of the bracket plate, and the head thereof is arranged with a hexagonal structure.
9. The clamping and fixing device for tensile test of hoisting wire rope according to claim 1, characterized in that: It also includes return springs respectively arranged on the left and right sides of the inner groove of the locking block, wherein: The top end of the return spring is fixedly connected to the top of the bracket plate, and the lower end is fixedly connected to the locking block.
10. The clamping and fixing device for tensile test of hoisting wire rope according to claim 1, characterized in that: It also includes limit clamps respectively arranged at the front and rear ends of the lower clamping block, wherein: The limit clamping seat is in a U-shaped structure as a whole, and the two ends of the bottom are detachably mounted on the bottom plate by screws.