Automatic tensioning device for steel wire rope

Abstract

The utility model relates to the technical field of transmission mechanisms, in particular to an automatic tensioning device for a steel wire rope, which comprises an air cavity sleeve and an air push rod, the air cavity sleeve comprises an outer cylinder and an inner cylinder, a first end of the outer cylinder is fixed with a first end of the inner cylinder, and an air inflation cavity is formed between the outer cylinder and the inner cylinder. A through hole for a steel wire rope to penetrate through is formed in the inner barrel, the first end of the air push rod is installed in the air inflation cavity in a sliding mode, an opening for the air push rod to penetrate through is formed in the second end of the outer barrel, a sliding groove for the inner barrel to be inserted in is formed in the first end of the push rod, and a through hole for the steel wire rope to penetrate through is formed in the air push rod. The through hole and the through hole are coaxially arranged, and a fastener used for fixing the steel wire rope is arranged at the second end of the air push rod. The steel wire rope tensioning device solves the technical problem that a steel wire rope tensioning device in the prior art needs to be manually and periodically checked and continuously adjust the pre-tightening force of the steel wire rope to keep the tensioning state of the steel wire rope.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission mechanism technical field, concretely relates to a steel wire rope automatic tensioner. BACKGROUND

[0002] With the rapid development of industrial mechanization and automation, the application of steel wire rope transmission technology is more and more extensive. However, the steel wire rope must be in tension state at all times during transmission, so as to carry out normal transmission work, therefore, the maintenance of steel wire rope pre-tightening state is the most important problem faced by steel wire rope transmission. At the same time, due to the long-term work of steel wire rope in tension state, the steel wire rope is continuously elongated under stress, if the tension state is not maintained at all times, the phenomenon of steel wire rope derailment is easy to appear, which causes great safety risk to the equipment. The traditional maintenance of steel wire rope tension state needs periodic inspection and continuous adjustment by artificial, which not only brings great physical burden to the staff, but also the pre-tightening force of steel wire rope exerted by personal experience is extremely inaccurate, and the problems of insufficient or over-tightening of steel wire rope pre-tightening force are easy to appear. SUMMARY

[0003] The utility model aims at providing a kind of steel wire rope automatic tensioner to solve the technical problem that steel wire rope tensioner needs periodic inspection and continuous adjustment of steel wire rope pre-tightening force to maintain steel wire rope tension state in prior art, and specific technical solutions are as follows:

[0004] The utility model provides a kind of steel wire rope automatic tensioner, including air cavity cover and air push rod, the air cavity cover includes outer cylinder and inner cylinder, the first end of the outer cylinder is fixed with the first end of the inner cylinder, the air cavity is formed between the outer cylinder and the inner cylinder, the through hole for steel wire rope to pass through is formed in the inside of the inner cylinder, the first end of the air push rod is slidably installed in the air cavity, the second end of the outer cylinder is provided with the opening for the air push rod to pass through, the first end of the push rod is provided with the sliding slot for the inner cylinder to be inserted, the air push rod is provided with the through hole for steel wire rope to pass through, the through hole is coaxial with the through hole, and the second end of the air push rod is equipped with fastener for fixing the steel wire rope, the outer cylinder is provided with the inflation hole and exhaust hole that are communicated with the air cavity.

[0005] The utility model steel wire rope automatic tensioner is further improved in that the inflation hole is installed with air valve type pressure sensor.

[0006] The utility model steel wire rope automatic tensioner is further improved in that the first sealing ring is arranged between the air push rod and the outer cylinder.

[0007] The utility model steel wire rope automatic tensioner is further improved in that the number of the first sealing ring is at least two.

[0008] The further improvement of the automatic steel wire rope tensioning device lies in that a second sealing ring is arranged between the air push rod and the inner cylinder.

[0009] The further improvement of the automatic steel wire rope tensioning device lies in that the second end of the air push rod is connected with a ratchet pawl, the outer periphery of the outer cylinder is provided with a retreat-preventing groove matched with the ratchet pawl, and an elastic element is connected between the side of the ratchet pawl close to the outer cylinder and the air push rod.

[0010] The further improvement of the automatic steel wire rope tensioning device lies in that the number of the ratchet pawls is multiple, and the multiple ratchet pawls are arranged on the outer periphery of the air push rod in a circumferential direction.

[0011] The further improvement of the automatic steel wire rope tensioning device lies in that the first end of the outer cylinder is provided with a fixing plate used for being fixed to an external structure.

[0012] The further improvement of the automatic steel wire rope tensioning device lies in that a pull rod used for fixing the steel wire rope is arranged in the through hole and the through hole, and the pull rod is fixed with the fastener after penetrating through the air push rod.

[0013] The further improvement of the automatic steel wire rope tensioning device lies in that the fastener comprises a nut and a tightening nut cap, and the pull rod is provided with external threads matched with the nut and the tightening nut cap.

[0014] The technical scheme of the automatic steel wire rope tensioning device has the following beneficial effects:

[0015] The automatic steel wire rope tensioning device adopts an oil cylinder structure, realizes the application of the steel wire rope pre-tightening force by using air pressure, and realizes the automatic steel wire rope tensioning function, which saves time and effort in operation, reduces the physical burden of workers, improves the convenience of device operation, solves the technical problems that the steel wire rope tensioning device needs periodic manual inspection and continuous adjustment of the steel wire rope pre-tightening force to maintain the steel wire rope tensioning state in the prior art, introduces a valve nozzle type pressure sensor to monitor the air pressure in the cavity during inflation, realizes the accurate application of the steel wire rope pre-tightening force, avoids the interference of worker experience, effectively eliminates the risks of insufficient and over-tightening of the steel wire rope pre-tightening force, improves the safety of the device, and can monitor the air cavity pressure in real time, accurately obtains the pre-tightening state of the steel wire rope through conversion, realizes the steel wire rope transmission whole-process pre-tightening monitoring, timely feedbacks the abnormal conditions in the transmission process, and improves the reliability of the device.

[0016] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this application, are intended to provide further understanding of the present application, and are used to interpret the illustrative embodiments of the present application and their descriptions, and do not constitute improper limitations on the present application. In the drawings:

[0018] Figure 1 is a front view of the steel wire rope automatic tensioning device of the present application;

[0019] Figure 2 is a longitudinal sectional view of the steel wire rope automatic tensioning device of the present application;

[0020] Figure 3 is a perspective view of the steel wire rope automatic tensioning device of the present application;

[0021] Figure 4 is an exploded view of the steel wire rope automatic tensioning device of the present application.

[0022] 1, steel wire rope; 2, pull rod; 3, fixed plate (only for fixing); 4, air valve type pressure sensor; 5, air cavity sleeve; 6, first sealing ring; 7, second sealing ring; 8, cover plate; 9, air push rod; 10, nut; 11, tightening nut; 12, pawl; 13, elastic member; 14, inflation hole; 15, exhaust hole; 16, outer cylinder; 17, inner cylinder; 18, retreat groove; 19, inflation cavity; 20, through hole. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in detail below with reference to the drawings.

[0024] The existing steel wire automatic tensioning device still needs the staff to manually apply pre-tightening force and potential energy to the steel wire rope and energy storage structure during the first installation, which has a very high requirement on the personal operation experience and technology of the staff, and the operation process is also time-consuming and laborious, for example, a steel wire rope automatic tensioning device with publication number CN220056154U. In addition, most of the existing steel wire rope automatic tensioning devices cannot realize real-time monitoring and accurate application of pre-tightening force to the steel wire rope, and also have the disadvantages of occupying a large space, for example, steel wire rope automatic tensioning devices with publication numbers CN117486112A and CN108167388A. The present application provides a steel wire rope automatic tensioning device which is simple to operate, saves time and labor, accurately applies pre-tightening force, can realize real-time monitoring and feedback, and occupies a small space.

[0025] Specifically, referring to Figures 1-4As shown, an automatic steel wire rope tensioning device includes a gas cavity sleeve 5 and a gas push rod 9. The gas cavity sleeve 5 includes an outer cylinder 16 and an inner cylinder 17. The first end of the outer cylinder 16 is fixed to the first end of the inner cylinder 17. A gas cavity 19 is formed between the outer cylinder 16 and the inner cylinder 17. A through hole 20 is formed in the inner cylinder 17 for the steel wire rope 1 to pass through. The first end of the gas push rod 9 is slidingly installed in the gas cavity 19. An opening is formed in the second end of the outer cylinder 16 for the gas push rod 9 to pass through. A sliding groove is formed in the first end of the gas push rod 9 for the inner cylinder 17 to be inserted. A through hole is formed in the gas push rod 9 for the steel wire rope 1 to pass through. The through hole is coaxially arranged with the through hole 20. A fastener is arranged at the second end of the gas push rod 9 for fixing the steel wire rope 1. An inflation hole 14 and an exhaust hole 15 are formed in the outer cylinder 16 and are connected to the gas cavity 19. The inflation hole 14 is used for high-pressure gas inflation. The exhaust hole 15 is used for external air pressure balance.

[0026] Specifically, a cover plate 8 is screwed on the second end of the outer cylinder 16 to prevent the gas push rod 9 from being pulled out of the cavity. The overall structure of the utility model is compact, the overall size is small, and the space occupied by the automatic steel wire rope tensioning device is small, so the structure can be used in the internal space of the crane boom, thereby widening the application range of the steel wire rope 1 transmission device.

[0027] Preferably, as shown in Figure 2 and Figure 4 A gas valve type pressure sensor 4 is installed on the inflation hole 14 to monitor the gas pressure inside the gas cavity in real time, and to monitor the gas pressure during inflation to ensure accurate application of the pre-tightening force of the steel wire rope 1.

[0028] Preferably, a first sealing ring 6 is arranged between the gas push rod 9 and the outer cylinder 16. An outwardly formed flange is formed on the first end of the gas push rod 9. A first clamping groove is formed on the outer periphery of the flange for installing the first sealing ring 6. The first sealing ring 6 protrudes from the first clamping groove after being installed in the first clamping groove, thereby sealing the gap between the outer cylinder 16 and the gas push rod 9.

[0029] Preferably, the number of first sealing rings 6 is at least two, thereby improving the sealing effect and preventing high-pressure gas leakage.

[0030] Preferably, a second sealing ring 7 is arranged between the gas push rod 9 and the inner cylinder 17. A second clamping groove is formed on the inner periphery of the flange for installing the second sealing ring 7. The second sealing ring 7 protrudes from the second clamping groove after being installed in the second clamping groove, thereby sealing the gap between the inner cylinder 17 and the gas push rod 9. The number of second sealing rings 7 is also at least two, thereby improving the sealing effect and preventing high-pressure gas leakage.

[0031] Preferably, the second end of the air push rod 9 is connected with a pawl 12, the outer periphery of the outer cylinder 16 is provided with a retreat-preventing groove 18 matched with the pawl 12, and the pawl 12 is connected with the air push rod 9 through the elastic member 13 on the side close to the outer cylinder 16. The retreat-preventing groove 18 is inclined towards the second end of the air push rod 9 to improve the retreat-preventing efficiency. The elastic member 13 is in a stretched state, and the elastic member 13 can be an elastic rope or a spring. The retreat-preventing function between the air push rod 9 and the air cavity sleeve 5 is realized through the cooperation between the pawl 12 and the retreat-preventing groove 18.

[0032] Preferably, the number of the pawls 12 is multiple, and the multiple pawls 12 are arranged on the outer periphery of the air push rod 9 in a circumferential direction to ensure the stability of the retreat-preventing force of the pawls 12.

[0033] Preferably, the first end of the outer cylinder 16 is provided with a fixing plate 3 for fixing to an external structure. The fixing plate 3 can be arranged as required, or the outer cylinder 16 can be directly fixed to the external structure, and the fixing plate 3 in the figure is only used for fixing illustration.

[0034] Preferably, the through hole and the through hole are provided with a pull rod 2 for fixing the steel wire rope 1, and the pull rod 2 is fixed with the fastener after passing through the air push rod 9. The fixing plate 3 is provided with an opening hole through which the pull rod 2 passes. The pull rod 2 can realize the connection between the steel wire rope 1 and the whole tensioning device.

[0035] Preferably, the fastener includes a nut 10 and a tightening nut 11, and the pull rod 2 is provided with external threads matched with the nut 10 and the tightening nut 11. The number of the nut 10 is at least two, and a gasket is further arranged between the nut 10 and the air push rod 9. The head of the steel wire rope 1 is fixed by the pull rod 2, the pull rod 2 passes through the fixing plate 3, the air cavity sleeve 5 and the inside of the air push rod 9, and is fixed by the nut 10 and the tightening nut 11 after extending out of the head of the air push rod 9.

[0036] High-pressure gas is continuously filled into the inside of the inflation cavity 19 through the inflation hole 14, and the gas continuously pushes the air push rod 9 to move outward, so as to realize the application of the pre-tightening force of the steel wire rope 1. Since the valve-type pressure sensor 4 is fixed on the air hole of the air cavity sleeve 5, the air pressure is monitored during inflation to ensure the accurate application of the pre-tightening force of the steel wire rope 1.

[0037] When the steel wire rope 1 is forced to lengthen, the air cavity 19 will push the air push rod 9 to move outward due to unbalanced force, and the air thrust will also change accordingly, so that the steel wire rope 1 and the air push rod 9 re-achieve a state of force balance, thereby realizing the automatic tensioning function of the steel wire rope 1. The air pressure inside the air cavity is monitored in real time through the air valve type pressure sensor 4, and the accurate pre-tightening state of the steel wire rope 1 can be obtained through conversion, thereby realizing the pre-tightening monitoring of the entire transmission process of the steel wire rope 1. When the air cavity 19 of the air cavity sleeve 5 leaks, the stability of the pre-tightening of the steel wire rope 1 is ensured through the stop function of the pawl 12 and the stop groove 18, and the air valve type pressure sensor 4 simultaneously alarms, timely reminding the staff to overhaul the steel wire rope 1 transmission device, effectively improving the stability of the steel wire rope 1 transmission.

[0038] The steel wire rope automatic tensioning device of the utility model adopts a cylinder-like structure, uses air pressure to realize the application of the pre-tightening force of the steel wire rope 1, and can realize the automatic tensioning function of the steel wire rope 1, which is time-saving and labor-saving, reduces the physical burden of workers, improves the convenience of device operation, solves the technical problems in the prior art that the steel wire rope 1 tensioning device needs periodic manual inspection and constant adjustment of the pre-tightening degree of the steel wire rope 1 to maintain the tensioning state of the steel wire rope 1. The air valve type pressure sensor 4 is introduced to monitor the air pressure in the cavity during inflation, realize the accurate application of the pre-tightening force of the steel wire rope 1, avoid worker experience interference, effectively eradicate the risks of insufficient pre-tightening force and over-tightening of the steel wire rope 1, improve the safety of the device, and can monitor the air cavity pressure in real time. The pre-tightening state of the steel wire rope 1 can be accurately obtained through conversion, thereby realizing the pre-tightening monitoring of the entire transmission process of the steel wire rope 1, timely feeding back the abnormal conditions of the transmission process, and improving the reliability of the device. The overall structure of the utility model is compact and has a small overall size, and the space occupied by the steel wire rope automatic tensioning device is small, so the structure can be used in small spaces such as the inside of a crane boom, mining machinery or shield special machinery, thereby widening the application range of the steel wire rope transmission device and improving the usability of the device.

[0039] The above only describes preferred embodiments of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An automatic wire rope tensioning device, characterized in that, The device includes an air chamber sleeve (5) and an air push rod (9). The air chamber sleeve (5) includes an outer cylinder (16) and an inner cylinder (17). The first end of the outer cylinder (16) is fixed to the first end of the inner cylinder (17). An inflation chamber (19) is formed between the outer cylinder (16) and the inner cylinder (17). A through hole (20) for a steel wire rope (1) to pass through is formed inside the inner cylinder (17). The first end of the air push rod (9) is slidably installed in the inflation chamber (19). The outer cylinder... The second end of (16) has an opening for the air push rod (9) to pass through. The first end of the push rod has a groove for the inner cylinder (17) to be inserted. The air push rod (9) has a through hole for the steel wire rope (1) to pass through. The through hole is coaxial with the through hole (20). The second end of the air push rod (9) has a fastener for fixing the steel wire rope (1). The outer cylinder (16) has an inflation hole (14) and an exhaust hole (15) that communicate with the inflation chamber (19).

2. The automatic wire rope tensioning device according to claim 1, characterized in that, A valve-type pressure sensor (4) is installed on the inflation port (14).

3. The automatic wire rope tensioning device according to claim 1, characterized in that, A first sealing ring (6) is provided between the air push rod (9) and the outer cylinder (16).

4. The automatic wire rope tensioning device according to claim 3, characterized in that, The number of the first sealing rings (6) is at least two.

5. The automatic wire rope tensioning device according to claim 1, characterized in that, A second sealing ring (7) is provided between the air push rod (9) and the inner cylinder (17).

6. The automatic wire rope tensioning device according to claim 1, characterized in that, The second end of the pneumatic actuator (9) is connected to a pawl (12), and the outer periphery of the outer cylinder (16) is provided with a backstop groove (18) that cooperates with the pawl (12). An elastic element (13) is connected between the side of the pawl (12) near the outer cylinder (16) and the pneumatic actuator (9).

7. The automatic wire rope tensioning device according to claim 6, characterized in that, The number of pawls (12) is multiple, and the multiple pawls (12) are arranged circumferentially at intervals on the outer periphery of the pneumatic push rod (9).

8. The automatic wire rope tensioning device according to claim 1, characterized in that, The first end of the outer cylinder (16) is provided with a fixing plate (3) for fixing to the external structure.

9. The automatic wire rope tensioning device according to claim 1, characterized in that, The through hole and the through hole are provided with a pull rod (2) for fixing the steel wire rope (1). The pull rod (2) passes through the pneumatic rod (9) and is fixed to the fastener.

10. The automatic wire rope tensioning device according to claim 9, characterized in that, The fasteners include a nut (10) and an adjusting nut (11), and the pull rod (2) is provided with external threads that are adapted to the nut (10) and the adjusting nut (11).

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