A cable tension adjuster

Abstract

The present invention relates to the technical field of cable production equipment, and discloses a cable tension adjuster, including two threaded adjustment structures installed between two fixed shafts and two hollow shafts; an elastic telescopic resistance structure installed inside each axial movable cavity and partially penetrating the circumferential surface of the inner fixed ring body; and two annular position limiting rotation structures respectively sleeved on the outer periphery of the two inner fixed ring bodies, wherein the inner surface of the annular position limiting rotation structure is in position limiting resistance with the resistance part of the elastic telescopic resistance structure. The cable tension adjuster performs pressure controllable restriction on the middle part of the cable line. When one end of the cable is pulled, the pulling force can only make the cable be pulled under the state of rolling friction when it is greater than the limited strength of the cable. Therefore, the limited strength during pulling is the adjustment of the tension, and the device can adjust the tension under a continuous rotation state, thereby achieving a continuous adjustment state.

Description

Technical Field

[0001] The present invention relates to the technical field of cable production equipment, and specifically relates to a cable tension adjuster. Background Art

[0002] Currently, in power production sites, such as the production of cables, after production, the cables need to be tension-adjusted. Chinese Patent No. CN107934673B discloses a horizontal adjuster for cable production tension adjustment. Its main structure includes a main hollow rod housing. One end of the main hollow rod housing is provided with an integrated sub-hollow housing. A support rod is installed at the bottom of the main hollow rod housing, and a fixed base plate is installed at the bottom end of the support rod. The inside of the main hollow rod housing is a main hollow structure. A threaded vertical plate is provided inside one end of the main hollow rod housing. A threaded rod is connected to the center of the threaded vertical plate through a threaded structure. A rotary contact mechanism is installed at one end of the threaded rod, and a rotary rod is installed at the other end of the threaded rod. A main piston is installed inside the main hollow rod housing in the main hollow structure. A curved rod is installed at the center of one end face of the main piston. One end of the curved rod is fixed with a vertical rod at the upper top of the main hollow rod housing. The inside of the sub-hollow housing is provided with a sub-hollow structure communicating with the main hollow structure. Inside the sub-hollow housing, a first exhaust hole and a second exhaust hole are respectively provided at the top and bottom of the sub-hollow structure. Inside the sub-hollow housing, a turbine installation space and an air pressure control mechanism are respectively provided and installed at the ends of the first exhaust hole and the second exhaust hole. A main air inlet hole communicating with the outside and the turbine installation space is provided inside the sub-hollow housing. One end face of the sub-hollow housing is fixed with a motor installation housing through bolts. A motor is installed inside the motor installation housing. The motor main shaft in the motor passes through the sub-hollow housing, and the end is fixed inside the sub-hollow housing through a bearing. A turbine is installed on the shaft surface of the motor main shaft inside the turbine installation space.

[0003] During operation, both ends of the cable to be fixed are fixed, and then the device is fixed at the central part of the cable through bolts. Then, the vertical rod is aligned with the middle of the cable. Then, the motor is turned on. Under the action of the motor, the turbine rotates continuously, so that air is continuously injected into the inside of the main hollow structure. When the air pressure can make the air pressure control mechanism exhaust, at this time, the rotary rod can be rotated. Under the influence of the threaded structure, the rotary contact mechanism moves, so that the piston moves under the action of the air pressure, thereby driving the vertical rod to move to adjust the tension of the cable. After adjustment, the motor can be turned off, and the air is exhausted. The rotary rod is rotated in the reverse direction for the reset function.

[0004] From the above description, it can be known that when the above device is working, it is necessary to fix the two ends of the cable and then adjust the tension of the cable at the fixed position in a static state. In other words, the device can only adjust the tension of the cable in a static state and cannot achieve a continuous adjustment state. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a cable tension adjuster, which performs controllable pressure restriction on the middle part of the cable. When one end of the cable is pulled, the pulling force can only cause the cable to be pulled under a rolling friction state when it is greater than the limited strength of the cable. Therefore, the limited strength during pulling is the tension adjustment, and the device can adjust the tension under continuous rotation, thereby achieving a continuous adjustment state, thereby solving the above-mentioned technical problems.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cable tension adjuster, comprising two inner fixed ring bodies symmetrically arranged at the upper and lower sides, two fixed shafts arranged at the rotating ends of the same side of the two inner fixed ring bodies, two hollow shafts arranged at the rotating ends of the other sides of the two inner fixed ring bodies, liquid flow holes arranged in the hollow shafts and extending to the central area of ​​the inner fixed ring bodies, a plurality of axial active cavities arranged in the inner side of the inner fixed ring bodies and arranged in an annular array, a limiting flow hole for connecting the inner side end face of the axial active cavity and the liquid flow hole, a three-way pipe body for connecting the liquid inlet ports of the two hollow shafts, and a The fixed bracket also includes two threaded adjustment structures installed between the two fixed shafts and the two hollow shafts, and the two threaded adjustment structures can adjust the distance between the two inner fixed ring bodies when they rotate synchronously and in the same direction; an elastic telescopic resistance structure installed inside each axial movable cavity and with part of the structure passing through the circumferential surface of the inner fixed ring body, and the elastic telescopic resistance structure can be stretched toward the periphery after high-pressure liquid is passed through the limiting flow hole; and two annular limiting rotation structures respectively sleeved on the periphery of the two inner fixed ring bodies, and the inner surface of the annular limiting rotation structure is in limiting resistance with the resistance part of the elastic telescopic resistance structure.

[0009] Through the above technical solution: by performing pressure-controllable restriction on the middle part of the cable, when one end of the cable is pulled, the pulling force can only make the cable be pulled under the state of rolling friction when it is greater than the limited strength of the cable. Therefore, the limited strength when pulling is the adjustment of the tension, and the device can adjust the tension under continuous rotation, thereby achieving a continuous adjustment state.

[0010] Preferably, the thread adjustment structure includes a thread sleeve, a first threaded rod, and a second threaded rod. The center of the thread sleeve is provided with an inner hole with openings at both ends. The first threaded rod and the second threaded rod are screwed into the two ends of the inner hole through thread structures. The opposite ends of the first threaded rod and the second threaded rod are provided with concave polygonal limit holes. A polygonal limit rod is inserted into the interiors of the two polygonal limit holes. The other ends of the first threaded rod and the second threaded rod are respectively provided with a first fixing sleeve and a second fixing sleeve for sleeve-type fixation around the fixed shaft or the hollow shaft. The thread structure includes an internal thread structure provided in the inner hole and external thread structures provided on the rod bodies of the first threaded rod and the second threaded rod. The thread directions of the external thread structures on the rod bodies of the first threaded rod and the second threaded rod are opposite. The cross-sections of the polygonal limit holes and the polygonal limit rod are the same and are both polygonal structures.

[0011] Through the above technical solution: When the thread sleeve is rotated, since the thread directions of the external thread structures on the rod bodies of the first threaded rod and the second threaded rod are opposite, therefore, under the reverse thread force state, the first threaded rod and the second threaded rod can move towards the center or towards both sides, so that the distance between the two annular clamping grooves can be effectively adjusted, so that the cable can be quickly inserted between the two annular clamping grooves and quickly be in a compressed state, improving the efficiency during work.

[0012] Preferably, the annular limit rotation structure includes an annular body with a sleeve hole in the center. The middle part of the outer circumferential surface of the annular body is provided with a concave annular clamping groove. The middle part of the inner circumferential surface of the annular body is provided with a concave annular abutting groove. The cross-section of the annular abutting groove is a V-shaped structure. The annular body is located outside the inner fixed ring body, and the inner fixed ring body is located at the central part of the sleeve hole.

[0013] Through the above technical solution: During work, the two annular clamping grooves can be clamped around the cable line. And when the pulling force at one end of the cable is greater than the maximum friction force received by the annular abutting groove, the horizontal movement of the cable can drive the annular body to generate a rotational movement, enabling a rolling friction movement between the cable line body and the annular body, thereby reducing the occurrence of cable line surface damage caused by friction.

[0014] Preferably, the elastic telescopic contact structure includes a piston plate placed inside the axial movement cavity and capable of moving axially along the axial movement cavity. A sealing ring for preventing liquid leakage is sleeved on the circumferential surface of the piston plate. A contact rod penetrating the circumferential surface structure of the inner fixed ring body is fixedly installed at the center of the end face of the piston plate facing the periphery. A return spring that generates a pressure on the piston plate towards the limiting flow hole is sleeved on the rod body of the contact rod located inside the axial movement cavity. An annular contact strip is provided at one end of the contact rod located outside. The cross-section of the annular contact strip is the same as that of the annular contact groove. The distance between the piston plate and the annular contact strip is less than the structural radius of the sleeved hole.

[0015] Through the above technical solution: When high-pressure liquid is injected into the three-way pipe body, the high-pressure liquid will enter the inside of each axial movement cavity along the liquid flow hole and the limiting flow hole. The high-pressure liquid affects the piston plate. When the intensity of the high-pressure liquid is greater than the elastic intensity of the return spring, the piston plate will drive the annular contact strip to move towards the periphery and finally get stuck inside the annular contact groove. By controlling the hydraulic pressure, the contact intensity between the annular contact strip and the annular contact groove can be controlled, and thus the maximum friction intensity during rotation can be controlled. This maximum friction intensity value is the tension adjustment value.

[0016] Compared with the prior art, the present invention provides a cable tension adjuster, which has the following beneficial effects:

[0017] This cable tension adjuster restricts the middle part of the cable wire in a pressure-controllable manner. When one end of the cable is pulled, the cable can only be pulled under the state of rolling friction when the pulling force is greater than the restricted strength of the cable. Therefore, the restricted strength during pulling is the adjustment of the tension. Moreover, this device can adjust the tension under a continuous rotation state, thus realizing a coherent adjustment state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a full-sectional structure diagram of the present invention;

[0019] Figure 2 is the front view of the present invention;

[0020] Figure 3 is a full-sectional structure diagram of the thread adjustment structure in the present invention;

[0021] Figure 4 is a three-dimensional sectional view of the annular limit rotation structure in the present invention;

[0022] Figure 5 is a three-dimensional view of the elastic telescopic contact structure in the present invention.

[0023] Wherein: 1. Inner fixing ring body; 2. Fixed shaft; 3. Hollow shaft; 4. Liquid flow hole; 5. Limit flow hole; 6. Axial moving cavity; 7. Fixed bracket; 8. Three-way pipe body; 9. Thread adjusting structure; 91. Thread sleeve; 92. Inner hole; 93. Thread structure; 94. First threaded rod; 95. Second threaded rod; 96. Polygonal limit hole; 97. Polygonal limit rod; 98. First fixing sleeve; 99. Second fixing sleeve; 10. Ring-shaped limit rotation structure; 101. Ring body; 102. Sleeve hole; 103. Ring-shaped clamping groove; 104. Ring-shaped abutting groove; 11. Elastic telescopic abutting structure; 111. Piston plate, 112. Abutting rod; 113. Return spring; 114. Ring-shaped abutting strip; 115. Sealing ring. Detailed implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0025] Please refer to Figure 1-2 , a cable tension adjuster, comprising two upper and lower symmetrically arranged inner fixing ring bodies 1, two fixed shafts 2 arranged at the rotating ends on the same side of the two inner fixing ring bodies 1, two hollow shafts 3 arranged at the rotating ends on the other side of the two inner fixing ring bodies 1, a liquid flow hole 4 arranged in the hollow shaft 3 and extending to the central area of the inner fixing ring body 1, a plurality of axially moving cavities 6 arranged inside the inner fixing ring body 1 and arranged in a circular array, a limit flow hole 5 for communicating the inner end face of the axially moving cavity 6 and the liquid flow hole 4, a three-way pipe body 8 for communicating the liquid inlet ports of the two hollow shafts 3, and a fixed bracket 7 installed on the end face of one fixed shaft 2. It further includes two thread adjusting structures 9 installed between the two fixed shafts 2 and the two hollow shafts 3. When the two thread adjusting structures 9 rotate synchronously and in the same direction, the distance between the two inner fixing ring bodies 1 can be adjusted; an elastic telescopic abutting structure 11 installed inside each axially moving cavity 6 and partially penetrating the circumferential surface of the inner fixing ring body 1. The elastic telescopic abutting structure 11 can be in a state of extending outward after high-pressure liquid is introduced into the limit flow hole 5; and two ring-shaped limit rotation structures 10 respectively sleeved on the outer periphery of the two inner fixing ring bodies 1. The inner surface of the ring-shaped limit rotation structure 10 is in a limit abutting with the abutting part of the elastic telescopic abutting structure 11.

[0026] Please refer to Figure 3, the screw adjustment structure 9 includes a screw sleeve 91, a first screw rod 94 and a second screw rod 95. The center of the screw sleeve 91 is provided with an inner hole 92 with both ends open. The first screw rod 94 and the second screw rod 95 are screwed into the two ends of the inner hole 92 through a thread structure 93. The opposite ends of the first screw rod 94 and the second screw rod 95 are provided with concave polygonal limit holes 96. A polygonal limit rod 97 is inserted into the interiors of the two polygonal limit holes 96. The other ends of the first screw rod 94 and the second screw rod 95 are respectively provided with a first fixing sleeve 98 and a second fixing sleeve 99 for sleeved fixation around the outer periphery of the fixed shaft 2 or the hollow shaft 3. The thread structure 93 includes an internal thread structure provided in the inner hole 92 and an external thread structure provided on the rod bodies of the first screw rod 94 and the second screw rod 95. And the thread directions of the external thread structures on the rod bodies of the first screw rod 94 and the second screw rod 95 are opposite. The cross-section of the polygonal limit hole 96 and the cross-section of the polygonal limit rod 97 are the same, both being polygonal structures.

[0027] Please refer to Figure 4 , the annular limit rotation structure 10 includes an annular body 101 with a sleeved hole 102 provided in the center. The middle part of the outer circumferential surface of the annular body 101 is provided with a concave annular card slot 103. The middle part of the inner circumferential surface of the annular body 101 is provided with a concave annular contact groove 104. The cross-section of the annular contact groove 104 is a V-shaped structure. The annular body 101 is located outside the inner fixed ring body 1, and the inner fixed ring body 1 is located at the central part of the sleeved hole 102.

[0028] Please refer to Figure 5 , the elastic telescopic contact structure 11 includes a piston plate 111 placed inside the axial movement cavity 6 and capable of moving axially along the axial movement cavity 6. A sealing ring 115 for preventing liquid leakage is sleeved on the circumferential surface of the piston plate 111. A contact rod 112 penetrating the circumferential surface structure of the inner fixed ring body 1 is fixedly installed at the center of the end face of the piston plate 111 facing the outside. A return spring 113 that generates a pressure on the piston plate 111 in the direction of the limit flow hole 5 is sleeved on the rod body of the contact rod 112 located inside the axial movement cavity 6. An annular contact strip 114 is provided at the outer end of the contact rod 112. The cross-section of the annular contact strip 114 is the same as the cross-section of the annular contact groove 104. The distance between the piston plate 111 and the annular contact strip 114 is less than the structural radius of the sleeved hole 102.

[0029] In use, first fix the fixing bracket 7 with bolts. Then, straighten the cable to the part between the two annular clamping grooves 103 and rotate the threaded sleeve 91. Since the thread directions of the external thread structures on the rod bodies of the first threaded rod 94 and the second threaded rod 95 are opposite, the first threaded rod 94 and the second threaded rod 95 can move towards the center or towards both sides under the reverse threaded force state, so that the two annular clamping grooves 103 can be clamped on the cable body part. Subsequently, dock the tee pipe body 8 with a hydraulic pump and start the hydraulic pump. At this time, when high-pressure liquid is injected into the tee pipe body 8, the high-pressure liquid will enter the interior of each axial moving cavity 6 along the liquid flow holes 4 and the limiting flow holes 5. The high-pressure liquid affects the piston plate 111. When the intensity of the high-pressure liquid is greater than the elastic intensity of the return spring 113, the piston plate 111 will drive the annular contact strip 114 to move outwards and finally be clamped inside the annular contact groove 104. At this time, pull one end of the cable to apply force. When the force is greater than the maximum friction intensity between the annular contact groove 104 and the annular contact strip 114, the horizontal movement of the cable can drive the annular body 101 to generate a rotational movement, so that a rolling friction movement is realized between the cable body and the annular body 101, thereby realizing tension adjustment.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cable tension adjuster, comprising two upper and lower symmetrically arranged inner fixing ring bodies (1), two fixed shafts (2) arranged at the rotating ends on the same side of the two inner fixing ring bodies (1), two hollow shafts (3) arranged at the rotating ends on the other side of the two inner fixing ring bodies (1), liquid flow holes (4) arranged on the hollow shafts (3) and extending to the central region of the inner fixing ring bodies (1), a plurality of axial moving cavities (6) arranged inside the inner fixing ring bodies (1) and arranged in an annular array, limiting flow holes (5) for communicating the inner end faces of the axial moving cavities (6) and the liquid flow holes (4), a three-way pipe body (8) for communicating the liquid inlet ports of the two hollow shafts (3), and a fixed bracket (7) installed on the end face of one fixed shaft (2), characterized in that: It further includes two threaded adjustment structures (9) installed between two fixed shafts (2) and two hollow shafts (3). When the two threaded adjustment structures (9) rotate synchronously and in the same direction, the distance between the two inner fixed ring bodies (1) can be adjusted; An elastic telescopic abutting structure (11) installed inside each axial movement cavity (6) and partially penetrating the circumferential surface of the inner fixed ring body (1). After high-pressure liquid is introduced into the limit flow holes (5), the elastic telescopic abutting structure (11) can be in a state of extending outward; And two annular limit rotation structures (10) respectively sleeved on the outer periphery of the two inner fixed ring bodies (1). The inner surface of the annular limit rotation structure (10) is in a limit abutment with the abutting part of the elastic telescopic abutting structure (11); The annular limit rotation structure (10) includes an annular body (101) with a sleeve hole (102) provided in the center. The middle part of the outer circumferential surface of the annular body (101) is provided with an inwardly concave annular clamping groove (103), and the middle part of the inner circumferential surface of the annular body (101) is provided with an inwardly concave annular abutting groove (104); The elastic telescopic abutting structure (11) includes a piston plate (111) placed inside the axial movement cavity (6) and capable of moving axially along the axial movement cavity (6). A sealing ring (115) for preventing liquid leakage is sleeved on the circumferential surface of the piston plate (111). A abutting rod (112) penetrating the circumferential surface structure of the inner fixed ring body (1) is fixedly installed at the center of the end face of the piston plate (111) facing the outside. A return spring (113) that generates a pressure on the piston plate (111) in the direction of the limit flow hole (5) is sleeved on the rod body of the abutting rod (112) located inside the axial movement cavity (6). An annular abutting strip (114) is provided at the outer end of the abutting rod (112).

2. The cable tension adjuster according to claim 1, characterized in that: The threaded adjustment structure (9) includes a threaded sleeve (91), a first threaded rod (94) and a second threaded rod (95). The center of the threaded sleeve (91) is provided with an inner hole (92) with two open ends. The first threaded rod (94) and the second threaded rod (95) are screwed into the two ends of the inner hole (92) through threaded structures (93). Concave polygonal limit holes (96) are provided at the opposite ends of the first threaded rod (94) and the second threaded rod (95). A polygonal limit rod (97) is inserted into the two polygonal limit holes (96). The other ends of the first threaded rod (94) and the second threaded rod (95) are respectively provided with a first fixing sleeve (98) and a second fixing sleeve (99) for sleeve-type fixation on the outer periphery of the fixed shaft (2) or the hollow shaft (3).

3. The cable tension adjuster according to claim 2, wherein: The threaded structure (93) includes an internal threaded structure provided in the inner hole (92) and external threaded structures provided on the rod bodies of the first threaded rod (94) and the second threaded rod (95), and the thread directions of the external threaded structures on the rod bodies of the first threaded rod (94) and the second threaded rod (95) are opposite.

4. A cable tension adjuster according to claim 3, characterized in that: The cross-section of the polygonal limiting hole (96) is identical to that of the polygonal limiting rod (97), and both are of polygonal structures.

5. The cable tension adjuster according to claim 4, wherein: The cross-section of the annular abutting groove (104) is of a V-shaped structure.

6. The cable tension adjuster according to claim 5, characterized in that: The annular body (101) is located on the periphery of the inner fixing ring body (1), and the inner fixing ring body (1) is located at the central part of the sleeving hole (102).

7. The cable tension adjuster according to claim 6, characterized in that: The cross-section of the annular abutting strip (114) is identical to that of the annular abutting groove (104).

8. The cable tension adjuster according to claim 7, wherein: The distance between the piston plate (111) and the annular abutting strip (114) is less than the structural radius of the sleeving hole (102).

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