Lightweight anchor cable tensioning device and tensioning jack

Abstract

The utility model relates to the technical field of anchor cable tension technology, concretely is a kind of lightweight anchor cable tension device and tension jack.The utility model provides a kind of lightweight anchor cable tension jack to solve the problem of traditional anchor cable tension jack heavy, so as to improve the working efficiency of anchor cable tension device, reduce the labor intensity of worker, indirectly reduce production cost, while also reduce the unsafe factor in the supporting process, in addition, the improvement also increases the blasting strength of anchor cable tension jack as a whole, effectively improves the service life and safety factor of product.

Description

Technical Field

[0001] This utility model relates to the field of anchor cable tensioning technology, specifically a lightweight anchor cable tensioning device and tensioning jack. Background Technology

[0002] Currently, anchor bolts and anchor cables are required in coal mine production support processes. Anchor cable installation requires anchor cable tensioning devices, such as... Figure 1 As shown, the traditional anchor cable tensioning device includes a pneumatic-hydraulic pump station 14, a traditional anchor cable tensioning jack 16, a hydraulic hose assembly 15, and a force indicator 17, thereby achieving automatic anchoring of the anchor cable during the anchor cable tensioning jack's cylinder extension and return processes. For example... Figure 2 As shown, a traditional anchor cable tensioning jack includes an outer cylinder 4, a middle cylinder 5, a piston rod 8, a jacking device 1, a loosening device 2, a tool anchor sleeve 3, a piston 6, a rear plug 7, a return spring 9, a return sleeve 10, a tool anchor 11, a wedge spring 12, a wedge 13, and a reversing valve. The outer cylinder 4 is equipped with a hydraulic inlet pipe and a hydraulic outlet pipe at its upper and lower parts, respectively. The top of the middle cylinder 5 is threadedly connected to the jacking device 1, and the bottom of the middle cylinder 5 is connected to the piston. The bottom end of the piston rod 8 of the jack is connected to the rear plug. When in use, first put the tray and anchor into the anchor cable, then put the anchor cable through the anchor cable tensioning jack, turn on the reversing valve, and through the action of hydraulic pressure, the jack cylinder pushes forward, causing the internal tool anchor to retract and tighten the anchor cable. The jack cylinder continues to move forward until the anchor is automatically locked. Use the reversing valve to reverse the direction, the jack cylinder retracts, and the tool anchor releases the anchor cable. At this time, the anchor cable tensioning jack can be removed to complete the pre-tightening installation of the anchor cable.

[0003] However, traditional anchor tensioning jacks are all welded and assembled from steel structural components, which are quite heavy. When using anchor tensioning jacks for anchor pre-tightening installation, it is necessary to manually lift the anchor tensioning jacks, which is quite laborious, indirectly increasing production costs and resulting in low production efficiency and low safety. Summary of the Invention

[0004] To address the problem of the heavy weight of traditional anchor cable tensioning jacks, this invention provides a lightweight anchor cable tensioning device and tensioning jack.

[0005] This utility model is achieved using the following technical solution:

[0006] A lightweight anchor cable tensioning device includes a lightweight anchor cable tensioning jack. The lightweight anchor cable tensioning jack includes a lightweight jack outer cylinder, a lightweight jack middle cylinder, and a lightweight jack piston rod. The lightweight jack outer cylinder includes a jack outer cylinder body, with an annular groove on the outer wall of the middle portion of the outer cylinder body. An outer cylinder composite material layer composed of multiple layers of carbon fiber and glass fiber is bonded inside the annular groove. The lightweight jack middle cylinder includes a jack middle cylinder body, with an annular groove on the outer wall of the middle portion of the middle cylinder body. An annular groove is bonded inside the annular groove. The lightweight jack piston rod includes a jack piston rod body, with an annular groove on the outer wall of the middle portion of the piston rod body. An annular groove is bonded inside the annular groove. An annular groove is bonded inside the annular groove.

[0007] Furthermore, the outer cylinder body, the middle cylinder body, and the piston rod body of the jack are all machined from steel.

[0008] A lightweight anchor cable tensioning jack includes a lightweight jack outer cylinder, a lightweight jack middle cylinder, and a lightweight jack piston rod. The lightweight jack outer cylinder includes a jack outer cylinder body, with an annular groove on the outer wall of the middle portion of the outer cylinder body. An outer cylinder composite material layer composed of multiple layers of carbon fiber and glass fiber is bonded inside the annular groove. The lightweight jack middle cylinder includes a jack middle cylinder body, with an annular groove on the outer wall of the middle portion of the middle cylinder body. A middle cylinder composite material layer composed of multiple layers of carbon fiber and glass fiber is bonded inside the annular groove. The lightweight jack piston rod includes a jack piston rod body, with an annular groove on the outer wall of the middle portion of the piston rod body. A piston rod composite material layer composed of multiple layers of carbon fiber and glass fiber is bonded inside the annular groove.

[0009] Furthermore, the outer cylinder body, the middle cylinder body, and the piston rod body of the jack are all machined from steel.

[0010] The beneficial effects of this utility model are as follows: This utility model improves upon the traditional anchor cable tensioning jack by replacing the steel structure of the outer cylinder, middle cylinder, and piston rod with a composite material layer composed of multiple layers of carbon fiber and glass fiber. This not only significantly reduces the overall weight of the anchor cable tensioning jack, achieving a lightweight transformation, but also improves the working efficiency of the anchor cable tensioning device, reduces the labor intensity of workers, indirectly reduces production costs, and reduces unsafe factors during the support process. In addition, this improvement also increases the overall burst strength of the anchor cable tensioning jack, effectively improving the product's service life and safety factor. Attached Figure Description

[0011] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of the anchor cable tensioning device;

[0014] Figure 2 This is a schematic diagram of the overall structure of a traditional tensioning jack.

[0015] Figure 3 This is a schematic diagram of the overall structure of the lightweight tension jack described in this utility model;

[0016] Figure 4 A schematic diagram of the outer cylinder of a lightweight jack;

[0017] Figure 5 A schematic diagram of the structure of the central cylinder of a lightweight jack;

[0018] Figure 6 This is a schematic diagram of the piston rod of a lightweight jack.

[0019] In the diagram: 1-Pressing device, 2-Anchor loosening device, 3-Tool anchor outer sleeve, 4-Jack outer cylinder, 5-Jack middle cylinder, 6-Piston, 7-Rear plug, 8-Jack piston rod, 9-Reset spring, 10-Reset sleeve, 11-Tool anchor, 12-Wedge spring, 13-Wedge, 14-Pneumatic hydraulic pump station, 15-Hydraulic hose assembly, 16-Traditional anchor cable tensioning jack, 17-Force indicator, 18-Jack outer cylinder body, 19-Jack middle cylinder body, 20-Jack piston rod body, 21-Outer cylinder composite material layer, 22-Middle cylinder composite material layer, 23-Piston rod composite material layer. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0022] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] like Figure 3 , 4 As shown in Figures 5 and 6, a lightweight anchor cable tensioning device includes a lightweight anchor cable tensioning jack. The lightweight anchor cable tensioning jack includes a lightweight jack outer cylinder, a lightweight jack middle cylinder, and a lightweight jack piston rod. The lightweight jack outer cylinder includes an outer cylinder body 18, with an outer cylinder annular groove on the middle outer wall of the outer cylinder body 18. An outer cylinder composite material layer 21, composed of multiple layers of carbon fiber and glass fiber, is bonded inside the outer cylinder annular groove. The lightweight jack middle cylinder includes a jack middle cylinder body 19, with a middle cylinder annular groove on the middle outer wall of the middle cylinder body 19. A middle cylinder composite material layer 22, composed of multiple layers of carbon fiber and glass fiber, is bonded inside the middle cylinder annular groove. The lightweight jack piston rod includes a jack piston rod body 20, with a piston rod annular groove on the middle outer wall of the jack piston rod body 20. A piston rod composite material layer 23, composed of multiple layers of carbon fiber and glass fiber, is bonded inside the piston rod annular groove.

[0024] In practice, the outer cylinder body 18, the middle cylinder body 19, and the piston rod body 20 of the jack are all machined from steel.

[0025] A lightweight anchor cable tensioning jack includes a lightweight jack outer cylinder, a lightweight jack middle cylinder, and a lightweight jack piston rod. The lightweight jack outer cylinder includes an outer cylinder body 18, with an outer cylinder annular groove on the middle outer wall of the outer cylinder body 18. An outer cylinder composite material layer 21, composed of multiple layers of carbon fiber and glass fiber, is bonded inside the outer cylinder annular groove. The lightweight jack middle cylinder includes a jack middle cylinder body 19, with a middle cylinder annular groove on the middle outer wall of the middle cylinder body 19. A middle cylinder composite material layer 22, composed of multiple layers of carbon fiber and glass fiber, is bonded inside the middle cylinder annular groove. The lightweight jack piston rod includes a jack piston rod body 20, with a piston rod annular groove on the middle outer wall of the jack piston rod body 20. A piston rod composite material layer 23, composed of multiple layers of carbon fiber and glass fiber, is bonded inside the piston rod annular groove.

[0026] In practice, the outer cylinder body 18, the middle cylinder body 19, and the piston rod body 20 of the jack are all machined from steel.

[0027] The steel structure in the middle of the outer cylinder, middle cylinder, and piston rod of the traditional anchor cable tensioning jack (i.e., the outer cylinder body 18, the middle cylinder body 19, and the piston rod body 20) is replaced with a composite material layer composed of multiple layers of carbon fiber and glass fiber. This reduces the weight of the cylinder and achieves lightweighting, while also improving the burst strength of the cylinder.

[0028] The experimental verification process and results of the blasting strength test are as follows:

[0029] To verify the strength of the composite materials of the outer cylinder, middle cylinder, and piston rod of the jack and the rationality of the structural design, a burst strength test was conducted using a burst test cylinder with both ends sealed and filled with injection holes, which has the same cylinder diameter, rod diameter, and wall thickness as the jack.

[0030] The test consisted of two steps: pressure loading and bursting. In the pressure loading stage, a high-pressure emulsion pump station was used to gradually increase the pressure of the test cylinder by 10% of the rated pressure until the design pressure of 40 MPa was reached. The pressure was then maintained for 5 minutes, and no leakage or deformation was found. In the bursting stage, the pressure was continued to be increased until the cylinder ruptured, and the burst pressure was read. The burst pressures of the test cylinders all exceeded 70 MPa, which is more than 1.5 times the design pressure of 40 MPa. The failure characteristics were observed to show plastic deformation at the rupture surface, without brittle fracture or flying fragments, indicating that the bursting strength was enhanced.

[0031] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.

Claims

1. A lightweight anchor cable tensioning device, characterized in that, The lightweight anchor cable tensioning jack includes a lightweight jack outer cylinder, a lightweight jack middle cylinder, and a lightweight jack piston rod. The lightweight jack outer cylinder includes the outer cylinder body (18), and an outer cylinder annular groove is opened on the middle outer wall of the outer cylinder body (18). An outer cylinder composite material layer (21) composed of multiple layers of carbon fiber and glass fiber is bonded inside the outer cylinder annular groove. The lightweight jack middle cylinder includes the jack middle cylinder body (19), and a middle cylinder annular groove is opened on the middle outer wall of the jack middle cylinder body (19). A middle cylinder composite material layer (22) composed of multiple layers of carbon fiber and glass fiber is bonded inside the middle cylinder annular groove. The lightweight jack piston rod includes the jack piston rod body (20), and a piston rod annular groove is opened on the middle outer wall of the jack piston rod body (20). A piston rod composite material layer (23) composed of multiple layers of carbon fiber and glass fiber is bonded inside the piston rod annular groove.

2. The lightweight anchor cable tensioning device according to claim 1, characterized in that, The outer cylinder body (18), the middle cylinder body (19), and the piston rod body (20) of the jack are all machined from steel.

3. A lightweight anchor cable tensioning jack, characterized in that, The lightweight jack includes an outer cylinder, a middle cylinder, and a piston rod. The outer cylinder includes an outer cylinder body (18), with an outer cylinder annular groove on the middle outer wall of the outer cylinder body (18). An outer cylinder composite material layer (21) composed of multiple layers of carbon fiber and glass fiber is bonded inside the outer cylinder annular groove. The middle cylinder includes a middle cylinder body (19), with a middle cylinder annular groove on the middle outer wall of the middle cylinder body (19). A middle cylinder composite material layer (22) composed of multiple layers of carbon fiber and glass fiber is bonded inside the middle cylinder annular groove. The piston rod includes a piston rod body (20), with a piston rod annular groove on the middle outer wall of the piston rod body (20). A piston rod composite material layer (23) composed of multiple layers of carbon fiber and glass fiber is bonded inside the piston rod annular groove.

4. A lightweight anchor cable tensioning jack according to claim 3, characterized in that, The outer cylinder body (18), the middle cylinder body (19), and the piston rod body (20) of the jack are all machined from steel.

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