Three-pulley force and length measuring detection device

Abstract

The invention provides a three-pulley force-measuring and length-measuring detection device. The three-pulley force-measuring and length-measuring detection device comprises a three-pulley assembly, a sensing assembly and a connecting plate piece, the connecting plate piece comprises two fixed connecting plates and two movable connecting plates, the two movable connecting plates are located between the two fixed connecting plates and can move to the outer portions of the two fixed connecting plates, and the fixed connecting plates are provided with detachable locking pieces used for fixing the movable connecting plates; the three-pulley assembly comprises a stress pulley rotationally connected between the two movable connecting plates, and guide pulleys rotationally connected between the two fixed connecting plates are arranged below the two sides of the stress pulley correspondingly. The sensing assembly comprises a force measurement sensing device used for detecting the stress condition of the stress pulley. According to the device, the deviated steel wire rope can be rapidly adjusted, the adjusting process is simple and rapid, the stress condition and the length of the steel wire rope can be detected, and the detection process is simple, convenient and accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and in particular to a three-pulley force and length measurement detection device. Background Art

[0002] In crane equipment, monitoring the stress of wire ropes is particularly important because it is directly related to the safety and stability of lifting operations. Currently, a commonly used method for monitoring the stress of wire ropes on the market is to use a three-pulley force measuring device; however, this device does have some challenges and limitations during installation and use.

[0003] Firstly, the installation of a three-pulley force measuring device usually involves overall disassembly and reinstallation, which means that when installing on crane equipment, it may be necessary to interrupt the normal workflow and spend extra time and manpower for disassembly and installation; this not only increases the complexity of the operation, but may also affect work efficiency.

[0004] Secondly, if the wire rope is misaligned during use, adjusting the three-pulley force measuring device becomes relatively complicated. Since the entire device needs to work closely with the position of the wire rope, when the wire rope is offset, the device may need to be disassembled, then readjusted and installed in the correct position. This process is not only complicated to operate, but may also cause additional equipment damage or safety risks.

[0005] Finally, this type of device only measures the force of the wire rope and cannot monitor the length of the wire rope. In order to prevent the wire rope from overwinding during operation, it can only be monitored by installing a length measuring device on other parts of the wire rope, which is a cumbersome process.

[0006] The three-pulley force and length measuring detection device of the present invention can simultaneously measure the force and length of the wire rope, making it more convenient to monitor the force and running length of the wire rope, an important component of the lifting equipment, during use. Summary of the invention

[0007] The invention discloses a three-pulley force and length measuring detection device, which solves the problems in the prior art that the detection device has a complicated installation and use process and has a large number of monitoring devices.

[0008] In order to solve the above technical problems, the present invention specifically adopts the following technical solutions:

[0009] A three-pulley force and length measuring detection device comprises a three-pulley assembly, a sensor assembly and a connecting plate; the connecting plate comprises two fixed connecting plates and two movable connecting plates, the two movable connecting plates are located between the two fixed connecting plates and can be moved to the outside of the two fixed connecting plates, and the fixed connecting plates are provided with detachable locking members for fixing the movable connecting plates; the three-pulley assembly comprises a force-bearing pulley rotatably connected between the two movable connecting plates, and guide pulleys rotatably connected between the two fixed connecting plates are respectively provided below both sides of the force-bearing pulley; the sensor assembly comprises a force measuring sensor device for detecting the force condition of the force-bearing pulley, and the sensor assembly also comprises a length measuring sensor device arranged on the force-bearing pulley for monitoring the length of the wire rope; the wire rope passes through the three-pulley assembly.

[0010] Preferably, the locking member includes a first guide rod and a second guide rod, one end of the first guide rod passes through two fixed connecting plates, and the two movable connecting plates are rotatably connected to the first guide rod; the two fixed connecting plates are provided with a through hole away from the first guide rod for the second guide rod to pass through, and the two movable connecting plates are provided with a circular hole for the second guide rod to pass through; the first guide rod and the second guide rod are respectively located above the two guide pulleys, and the force pulley is located between the first guide rod and the second guide rod.

[0011] Preferably, a reliable rod away from the first guide rod is fixed to the top surface of the movable connecting plate, and a pin hole close to the first guide rod is opened on the movable connecting plate, and a pin is inserted into the pin hole; the movable connecting plate is arranged in a V shape, and the force pulley is rotatably connected to the center of the movable connecting plate.

[0012] Preferably, a V-shaped groove is formed on the top of the fixed connecting plate, and a clamping plate is fixed between the two fixed connecting plates, and the clamping plate is located between the two guide pulleys.

[0013] Preferably, the force sensing device comprises a shaft pin sensor mounted on a force-bearing pulley.

[0014] Preferably, the length measuring sensor device includes a first gear and a second gear, the first gear is fixed on the axle of the force pulley, the second gear is matched with the first gear, and the axle of the second gear passes through a movable connecting plate away from the force pulley and is provided with an encoder.

[0015] Preferably, a protective shell covering the encoder is fixed on one of the movable connecting plates.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The force pulley is located between the two movable connecting plates, and the guide pulley is located between the two fixed connecting plates. During the use of the detection device, if the wire rope is shifted in position in the device, it is only necessary to disassemble the locking piece and rotate the movable connecting plate to move the movable connecting plate to the outside of the two fixed connecting plates, open the tops of the two fixed connecting plates, readjust the position of the wire rope, close the two movable connecting plates, and then restore the locking piece. The operation is convenient and fast. At the same time, the force condition of the wire rope can be detected by the force measuring sensor device, and the running length of the wire rope can be effectively measured by the length measuring sensor device to prevent the wire rope from being overwound. The present invention can quickly adjust the wire rope that has been shifted, and the adjustment process is simple and fast. The force condition of the wire rope and the length of the wire rope can be detected, and the detection process is simple and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of an open state of a device according to an embodiment of the present invention;

[0020] Figure 3 Schematic diagram of the internal structure of an embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of the force direction of the force measuring detection device of the present invention.

[0022] In the figure: 100, three-pulley assembly; 101, force pulley; 102, guide pulley; 200, sensor assembly; 201, encoder; 202, first gear; 203, second gear; 204, protective shell; 205, axle pin sensor; 300, connecting plate; 301, fixed connecting plate; 302, movable connecting plate; 303, first guide rod; 304, second guide rod; 305, reliable rod; 306, pin hole; 307, pin; 308, clamping plate; 400, wire rope. DETAILED DESCRIPTION

[0023] The specific contents of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1 , Figure 2 and Figure 3As shown, the present invention provides a three-pulley force and length measurement detection device, comprising a three-pulley assembly 100, a sensor assembly 200 and a connecting plate 300; the connecting plate 300 comprises two fixed connecting plates 301 and two movable connecting plates 302, the two movable connecting plates 302 are located between the two fixed connecting plates 301 and can be moved to the outside of the two fixed connecting plates 301, and the fixed connecting plates 301 are provided with a detachable locking member for fixing the movable connecting plates 302; the three-pulley assembly 100 includes a force pulley 101 rotatably connected between two movable connecting plates 302, and guide pulleys 102 rotatably connected between two fixed connecting plates 301 are respectively provided below both sides of the force pulley 101; the sensor assembly 200 includes a force measuring sensor device for detecting the force condition of the force pulley 101, and the sensor assembly 200 also includes a length measuring sensor device arranged on the force pulley 101 for monitoring the length of the wire rope 400; the wire rope 400 passes through the three-pulley assembly 100.

[0025] like Figure 1 , Figure 2 and Figure 3As shown, the locking member includes a first guide rod 303 and a second guide rod 304, one end of the first guide rod 303 passes through two fixed connecting plates 301, and the two movable connecting plates 302 are both rotatably connected to the first guide rod 303; the two fixed connecting plates 301 are each provided with a through hole away from the first guide rod 303 and for the second guide rod 304 to pass through, and the two movable connecting plates 302 are each provided with a round hole for the second guide rod 304 to pass through; the first guide rod 303 and the second guide rod 304 are respectively located above the two guide pulleys 102, and the force pulley 101 is located between the first guide rod 303 and the second guide rod 304. The first guide rod 303 is located on the left side of the movable connecting plate 302, so that the fixed connecting plate 301 and the movable connecting plate 302 can rotate, and the second guide rod 304 is located on the right side of the movable connecting plate 302 and can be disassembled, and cooperates with the first guide rod 303 to make the movable connecting plate 302 open and close; when the detection device is in operation, the detection device is in a closed state, and the steel wire rope 400 to be detected is located therein, and the opposite surfaces of the two fixed connecting plates 301 are respectively in contact with the opposite surfaces of the two movable connecting plates 302; when the detection device is installed or adjusted, first align the second guide rod 304 with the perforation on the fixed connecting plate 301 and the circular hole on the movable connecting plate 302 The holes are separated, and then the side of the mobile connecting plate 302 with the circular hole is moved upward, so that the other side of the mobile connecting plate 302 rotates around the first guide rod 303, and the fixed connecting plate 301 and the mobile connecting plate 302 are separated and at a 60° angle, so that it is convenient for the staff to put their hands between the two fixed connecting plates 301 to perform related operations; and the circular hole on a mobile connecting plate 302 can also be set as a threaded hole, and the corresponding thread is set on the second guide rod 304, so that the second guide rod 304 can be threadedly connected to the threaded hole on a mobile connecting plate 302, thereby increasing the firmness of the connection between the second guide rod 304 and the mobile connecting plate 302.

[0026] like Figure 1 , Figure 2 and Figure 3As shown, a reliable rod 305 away from the first guide rod 303 is fixed on the top surface of the mobile connecting plate 302, and a latch hole 306 close to the first guide rod 303 is opened on the mobile connecting plate 302, and a latch 307 is inserted into the latch hole 306; the mobile connecting plate 302 is set in a V shape, and the force pulley 101 is rotatably connected to the center of the mobile connecting plate 302. The latch 307 can prevent the mobile connecting plate 302 from closing; when it is necessary to adjust or install the wire rope 400, the second guide rod 304 is removed, and the mobile connecting plate 302 is pulled along the first guide rod 303 by the reliable rod 305. When the latch hole 306 appears, the matching latch 307 is inserted into the latch hole 306. At this time, the mobile connecting plate 302 is fixed, and the mobile connecting plate 302 is fixed above the fixed connecting plate 301 at an angle of 60°. At this time, the hand can be put between the two fixed connecting plates 301 to adjust the wire rope 400 accordingly.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, a V-shaped groove is provided on the top of the fixed connecting plate 301, and a clamping plate 308 is fixed between the two fixed connecting plates 301, and the clamping plate 308 is located between the two guide pulleys 102. The V-shaped groove on the fixed connecting plate 301 cooperates with the V-shaped movable connecting plate 302, so that when the movable connecting plate 302 is moved out from between the two fixed connecting plates 301, the staff can install or adjust the wire rope 400; the clamping plate 308 can increase the firmness of the connection between the two fixed connecting plates 301; the clamping plate 308 is also fixed between the two movable connecting plates 302, and the force pulley 101 is located between the two clamping plates 308, and the clamping plate 308 can increase the firmness of the connection between the two movable connecting plates 302.

[0028] like Figure 3 As shown, the force sensing device includes an axle pin sensor 205 installed on the force pulley 101. The axle pin of the force pulley 101 is replaced with the axle pin sensor 205, and the force pulley 101 is installed between two movable connecting plates 302. The axle pin sensor 205 can determine the overall force situation by detecting the tension of the wire rope 400 in the upward direction during the detection process.

[0029] like Figure 2 and Figure 3As shown, the length measuring sensor device includes a first gear 202 and a second gear 203. The first gear 202 is fixed on the axle of the force pulley 101, and the second gear 203 is matched with the first gear 202. The axle of the second gear 203 passes through a mobile connecting plate 302 on the side away from the force pulley 101 and is provided with an encoder 201. There is a gap of about 3 cm between the force pulley 101 and the mobile connecting plate 302. The length measuring sensor device is installed in this gap. The force pulley 101 rotates with the operation of the wire rope 400 to drive the axle of the force pulley 101 to rotate, thereby driving the first gear 202 to rotate, and the second gear 203 also rotates with the first gear 202. At this time, the encoder 201 records the rotation of the axle of the second gear 203 to detect the length of the wire rope 400.

[0030] like Figure 1 and Figure 2 As shown, a protective shell 204 covering the encoder 201 is fixed on one of the movable connecting plates 302. The protective shell 204 can effectively protect the encoder 201.

[0031] When in use, the force pulley 101 is located between the two movable connecting plates 302, and the guide pulley 102 is located between the two fixed connecting plates 301. During the use of the detection device, if the wire rope 400 is offset in position in the device, it is only necessary to disassemble the second guide rod 304 and rotate the movable connecting plate 302, so that the movable connecting plate 302 rotates around the first guide rod 303 and moves to the outside of the two fixed connecting plates 301, open the tops of the two fixed connecting plates 301, and then readjust the position of the wire rope 400, and then close the two movable connecting plates 302, and then restore the second guide rod 304; at the same time, the diameter of the force pulley 101 is Φ, when the wire rope 400 is retracted and released, it drives the force pulley 101 and the first gear 202 and the second gear 203 to rotate, and the encoder 201 installed on the second gear 203 can know its number of rotations n, then the retracted length L of the wire rope 400 = π×Φ×n; Figure 4 As shown, the wire rope 400 passes through the force pulley 101 and the guide pulley 102, and a bending deformation of an angle α is generated at the guide pulley 102. At this time, the tension on the force pulley 101 is F, and the tension on the wire rope 400 is F 拉 , then the calculation formula is F = 2 × sinα × F 拉 .

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A three-pulley force and length measuring detection device, characterized in that: The invention comprises a three-pulley assembly (100), a sensor assembly (200) and a connecting plate (300); the connecting plate (300) comprises two fixed connecting plates (301) and two movable connecting plates (302); the two movable connecting plates (302) are located between the two fixed connecting plates (301) and can be moved to the outside of the two fixed connecting plates (301); the fixed connecting plates (301) are provided with a detachable locking member for fixing the movable connecting plates (302); the three-pulley assembly (100) comprises a locking member rotatably connected between the two fixed connecting plates (301) and a locking member for locking the movable connecting plates (302); A force pulley (101) is provided between two movable connecting plates (302); guide pulleys (102) rotatably connected between two fixed connecting plates (301) are provided below both sides of the force pulley (101); the sensor assembly (200) includes a force measuring sensor device for detecting the force condition of the force pulley (101); the sensor assembly (200) also includes a length measuring sensor device arranged on the force pulley (101) for monitoring the length of the steel wire rope (400); the steel wire rope (400) passes through the three-pulley assembly (100).

2. A three-pulley force and length measurement detection device according to claim 1, characterized in that: The locking member comprises a first guide rod (303) and a second guide rod (304); one end of the first guide rod (303) passes through two fixed connecting plates (301); and the two movable connecting plates (302) are both rotatably connected to the first guide rod (303); the two fixed connecting plates (301) are both provided with a through hole away from the first guide rod (303) and for the second guide rod (304) to pass through; and the two movable connecting plates (302) are both provided with a round hole for the second guide rod (304) to pass through; the first guide rod (303) and the second guide rod (304) are respectively located above the two guide pulleys (102); and the force pulley (101) is located between the first guide rod (303) and the second guide rod (304).

3. A three-pulley force and length measurement detection device according to claim 2, characterized in that: A reliable rod (305) away from the first guide rod (303) is fixed on the top surface of the movable connecting plate (302); a latch hole (306) close to the first guide rod (303) is opened on the movable connecting plate (302); a latch (307) is inserted into the latch hole (306); the movable connecting plate (302) is arranged in a V shape, and the force pulley (101) is rotatably connected to the center of the movable connecting plate (302).

4. A three-pulley force and length measurement detection device according to claim 1, characterized in that: A V-shaped groove is provided on the top of the fixed connecting plate (301), a clamping plate (308) is fixed between the two fixed connecting plates (301), and the clamping plate (308) is located between the two guide pulleys (102).

5. The three-pulley force and length measuring detection device according to claim 1, characterized in that: The force sensing device comprises a shaft pin sensor (205) mounted on the force-bearing pulley (101).

6. A three-pulley force and length measurement detection device according to claim 1, characterized in that: The length measuring sensor device comprises a first gear (202) and a second gear (203), wherein the first gear (202) is fixed on the axle of the force-bearing pulley (101), and the second gear (203) is matched with the first gear (202), and the axle of the second gear (203) passes through a movable connecting plate (302) on a side away from the force-bearing pulley (101) and is provided with an encoder (201).

7. A three-pulley force and length measurement detection device according to claim 6, characterized in that: A protective shell (204) covering the encoder (201) is fixed on one of the movable connecting plates (302).

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