Axial force and torque measuring device in anchor cable drawing process

Abstract

The utility model discloses an axial force and torque measuring device in an anchor cable drawing process. The lower end of an upper-end workpiece clamp is connected with the upper end of a lower-end workpiece clamp through a ball hinge; tooth openings of the upper-end torque transmission gear and the lower-end torque transmission gear are both axially arranged, the upper-end torque transmission gear is fixedly arranged on the upper-end workpiece clamp in a sleeving mode, and the lower-end torque transmission gear is fixedly arranged on the lower-end workpiece clamp in a sleeving mode. The two ends of the torque separation device are axially clamped with a tooth opening of the upper-end torque transmission gear and a tooth opening of the lower-end torque transmission gear through gears correspondingly. The tension sensor is axially mounted on the side wall of the upper-end workpiece clamp; the torsion sensor is axially installed on the side wall of the torque separation device. Torque and tension generated in the anchor cable drawing process can be separated through the axial force and torque separation device, synchronous measurement of the tension and the torque is achieved through the tension sensor and the torsion sensor, measurement of the axial force and the torque can be achieved without interference, and the measurement precision of the measurement device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor cable anchoring strength measurement, in particular to an axial force and torque measuring device in the process of anchor cable pulling. Background Art

[0002] Anchor cable support is a common support measure to maintain the stability of rock and soil, and the anchoring strength of the anchor cable is crucial to its bearing capacity. When using a tensioning machine to measure the anchoring strength of the anchor cable, due to the winding characteristics of the steel strand, the anchor cable structure will generate a torque opposite to the winding direction under the action of the tensioning force. Therefore, the pull-out failure of the anchor cable actually occurs under the combined action of tension and torque, and measuring the tension and torque in this process is of great significance for studying the anchoring strength and failure mechanism of the anchor cable and enhancing the anchoring strength of the anchor cable. However, there is no device in the prior art that can separately measure the torque and tension generated during the pulling of the anchor cable.

[0003] Therefore, it is necessary to develop a device for measuring axial force and torque during the anchor cable pulling process to solve the above problems. Summary of the invention

[0004] The purpose of the utility model is to design a device for measuring the axial force and torque in the process of pulling the anchor cable in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A device for measuring axial force and torque during the pulling process of an anchor cable, comprising:

[0007] An upper workpiece fixture; the upper end of the upper workpiece fixture is connected to the chuck of the testing machine;

[0008] The lower workpiece fixture; the lower end of the lower workpiece fixture is connected to the anchor cable; the upper workpiece fixture, the lower workpiece fixture and the anchor cable are coaxially arranged;

[0009] Axial force and torque separation device; the axial force and torque separation device comprises a ball joint, an upper torque transmission gear, a torque separation device, and a lower torque transmission gear; the lower end of the upper workpiece fixture and the upper end of the lower workpiece fixture are connected by a ball joint; the teeth of the upper torque transmission gear and the lower torque transmission gear are both axially arranged and arranged relatively, the upper torque transmission gear is fixedly sleeved on the upper workpiece fixture, and the lower torque transmission gear is fixedly sleeved on the lower workpiece fixture; the two ends of the torque separation device are axially engaged with the teeth of the upper torque transmission gear and the teeth of the lower torque transmission gear through the gears respectively;

[0010] Tension sensor; the tension sensor is axially mounted on the side wall of the upper workpiece fixture;

[0011] Torque sensor; the torque sensor is axially mounted on the side wall of the torque separation device.

[0012] The beneficial effects of the utility model are:

[0013] The present application can separate the torque and tension generated during the pulling of the anchor cable through the axial force and torque separation device, and realize synchronous measurement of tension and torque through the tension sensor and the torque sensor, so as to achieve non-interference in the axial force and torque measurement and improve the measurement accuracy of the measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a cross-sectional view in the main viewing direction of this application;

[0015] Figure 2 This is a schematic diagram of the structure of the axial force and torque separation device in this application;

[0016] Figure 3 A three-dimensional diagram (partially cutaway) of the axial force and torque separation device in the present application;

[0017] Figure 4 It is a schematic diagram of the structure of the ball twist in this application;

[0018] Figure 5 It is a structural schematic diagram of the torque separation device in this application;

[0019] In the figure: 1-testing machine chuck, 2-upper workpiece fixture, 3-axial force and torque separation device, 31-ball twist, 32-upper torque transmission gear, 33-torque separation device, 331-upper gear, 332-connecting pipe, 333-lower gear, 34-lower torque transmission gear, 35-tension sensor, 36-torque sensor, 4-lower workpiece fixture, 5-anchor cable. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships that are usually understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present utility model.

[0024] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings.

[0027] like Figure 1-5 As shown, a device for measuring axial force and torque during the pulling process of an anchor cable comprises:

[0028] The upper workpiece fixture 2; the upper end of the upper workpiece fixture 2 is connected to the testing machine chuck 1;

[0029] The lower workpiece fixture 4; the lower end of the lower workpiece fixture 4 is connected to the anchor cable 5; the upper workpiece fixture 2, the lower workpiece fixture 4, and the anchor cable 5 are coaxially arranged;

[0030] Axial force and torque separation device 3; the axial force and torque separation device 3 includes a ball joint 31, an upper torque transmission gear 32, a torque separation device 33, and a lower torque transmission gear 34; the lower end of the upper workpiece fixture 2 and the upper end of the lower workpiece fixture 4 are connected through the ball joint 31; the teeth of the upper torque transmission gear 32 and the lower torque transmission gear 34 are axially arranged and arranged relative to each other, the upper torque transmission gear 32 is fixedly sleeved on the upper workpiece fixture 2, and the lower torque transmission gear 34 is fixedly sleeved on the lower workpiece fixture 4;

[0031] The torque separation device 33 includes an upper gear 331, a connecting tube 332, and a lower gear 333. The two ends of the connecting tube 332 are respectively connected to the lower end of the upper gear 331 and the upper end of the lower gear 333; the teeth of the upper gear 331 and the lower gear 333 are axially arranged, the teeth of the upper gear 331 are axially engaged with the teeth of the upper torque transfer gear 32, and the teeth of the lower gear 333 are axially engaged with the teeth of the lower torque transfer gear 34; the torque sensor 36 is axially installed on the outer wall of the connecting tube 332.

[0032] The connecting tube 332 is disposed outside the ball joint 31 , and the connecting tube 332 does not contact the ball joint 31 .

[0033] The tension sensor 35 is axially mounted on the side wall of the upper workpiece fixture 2; preferably, it is placed at a position of the upper workpiece fixture 2 near the ball joint 31; the lead wire of the tension sensor 35 passes through the upper torque transmission gear 32 and then leads out;

[0034] Torque sensor 36: Torque sensor 36 is axially mounted on the outer wall of connecting tube 332 and is also led out through a lead wire. Both tension sensor 35 and torque sensor 36 use strain gauges, or sensors, of the Mogong brand model BF1K-4HA.

[0035] In some embodiments, a ball head is provided at the lower end of the upper workpiece fixture 2 , and a ball groove is provided at the upper end of the lower workpiece fixture 4 .

[0036] When pulling the anchor cable 5, the upper workpiece fixture 2 will transmit the torque and tension during the pulling process. When the tension and torque are transmitted to the axial force and torque separation device 3, since the ball joint cannot transmit torque, the upper workpiece fixture 2 only bears tension at the position close to the ball joint 31, and the torque will be transmitted to the torque separation device 33 through the lower torque transmission gear 34. At the same time, since the tension load is not transmitted between the gears, the tension at the position close to the ball joint 31 of the upper workpiece fixture 2 is completely equal to the tension of the anchor cable 5 by the testing machine, and the connecting pipe 332 is completely under the pure torque effect, and the load is the torque applied by the testing machine. By setting a tension sensor 35 at the position of the upper workpiece fixture 2 close to the ball joint 31, the magnitude of the tension can be measured, and by setting a torque sensor 36 at the connecting pipe 332, the magnitude of the torque can be measured. The pure torsion and pure tension effects are finally transmitted to the workpiece fixture, and the final reaction force is provided by the testing machine.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A device for measuring axial force and torque during cable pulling, characterized in that: include: An upper workpiece fixture; the upper end of the upper workpiece fixture is connected to the chuck of the testing machine; The lower workpiece fixture; the lower end of the lower workpiece fixture is connected to the anchor cable; the upper workpiece fixture, the lower workpiece fixture and the anchor cable are coaxially arranged; Axial force and torque separation device; the axial force and torque separation device comprises a ball joint, an upper torque transmission gear, a torque separation device, and a lower torque transmission gear; the lower end of the upper workpiece fixture and the upper end of the lower workpiece fixture are connected by a ball joint; the teeth of the upper torque transmission gear and the lower torque transmission gear are both axially arranged and arranged relatively, the upper torque transmission gear is fixedly sleeved on the upper workpiece fixture, and the lower torque transmission gear is fixedly sleeved on the lower workpiece fixture; the two ends of the torque separation device are axially engaged with the teeth of the upper torque transmission gear and the teeth of the lower torque transmission gear through the gears respectively; Tension sensor; the tension sensor is axially mounted on the side wall of the upper workpiece fixture; Torque sensor; the torque sensor is axially mounted on the side wall of the torque separation device.

2. The device for measuring axial force and torque during cable pulling according to claim 1, characterized in that: The torque separation device includes an upper gear, a connecting tube, and a lower gear. The two ends of the connecting tube are respectively connected to the lower end of the upper gear and the upper end of the lower gear. The teeth of the upper gear and the lower gear are both axially arranged. The teeth of the upper gear are axially engaged with the teeth of the upper torque transmission gear, and the teeth of the lower gear are axially engaged with the teeth of the lower torque transmission gear. The torque sensor is axially installed on the outer side wall of the connecting tube.

3. The device for measuring axial force and torque during anchor cable pulling according to claim 2, characterized in that: The connecting pipe is arranged on the outside of the ball joint and does not contact with the ball joint.

Images