Constant tension control device for steel wire release

Abstract

The present application relates to the technical field of steel wire tension control, in particular to a constant tension control device for steel wire release, comprising a wire reel and a coaxial oil cylinder located in the wire reel and fixed relatively, the oil cylinder stores fluid inside, a plurality of damping bodies are arranged along the oil cylinder axis direction in the oil cylinder, and the damping bodies are used for limiting the rotation speed of the wire reel; the fluid flow is limited by using a flow limiting channel, so as to limit the rotation speed of the shaft and the fan plate, and then damping force is provided for the wire reel, the speed of the wire reel releasing the steel wire and the tension of the steel wire are controlled conveniently, the wear phenomenon of the friction plate in the traditional mode can be avoided, stable damping force is provided for the wire reel conveniently, and meanwhile when the steel wire release speed is improved, the fluid flow rate is accelerated, the reverse limitation of the flow limiting channel on the fluid is enhanced, the damping effect on the wire reel is enhanced, and the speed of the wire reel releasing the steel wire is always kept in a specified range.

Description

Technical Field

[0001] This invention relates to the technical field of wire tension control, and in particular to a constant tension control device for wire release. Background Technology

[0002] In the field of industrial production and materials processing, steel wire, as a basic and key wire material, is widely used in various scenarios such as cable manufacturing, bridge cables, automobile tire cords, and precision instruments. In these applications, steel wire is usually stored and transported on a reel, and it often needs to be released smoothly and at a uniform speed during subsequent processing or use.

[0003] The stability of wire release, especially the constant control of its tension, is a core element in ensuring the quality of the final product and the reliability of the process. If the tension is too low, the wire may loosen and pile up, resulting in tangled wires or even breakage. If the tension is too high, it may cause excessive stretching of the wire, surface damage, or changes in its internal structure, affecting its mechanical properties and service life. Therefore, achieving precise control of constant tension during the wire release process has become a technical problem that related industries have long been concerned with and committed to solving.

[0004] Traditional control methods mainly rely on mechanical friction to provide damping, thereby adjusting the coil speed to control tension. However, this method leads to structural wear, requiring periodic replacement of friction components or the entire damping structure, which increases costs. Furthermore, as the friction components wear down, their thickness decreases, causing changes in the compressive force provided by the friction components, which in turn alters the damping force and affects the accuracy of tension control. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a constant tension control device for steel wire release, the specific technical solution of which is as follows:

[0006] The present invention provides a constant tension control device for releasing steel wire, comprising a wire reel and an oil cylinder coaxially located inside the wire reel and relatively fixed therein. The oil cylinder contains fluid, and a plurality of damping bodies are arranged along the axial direction of the oil cylinder inside the oil cylinder, the damping bodies being used to limit the rotational speed of the wire reel.

[0007] The damping body includes a damping box, a rotating shaft, and a fan plate. The oil cylinder rotates relative to the damping box about its own axis. A fan-shaped cavity is formed inside the damping box. The rotating shaft is coaxially arranged with the fan-shaped cavity. The rotating oil cylinder drives the rotating shaft to rotate on the damping box. The fan plate is located inside the fan-shaped cavity and is fixedly connected to the rotating shaft.

[0008] A flow-limiting channel communicating with the inside of the oil cylinder is provided on both sides of the fan-shaped cavity, and the fluid in the oil cylinder enters and exits the fan-shaped cavity through the flow-limiting channel.

[0009] Furthermore, the rotating shaft is hollow, and a movable column is provided inside the rotating shaft. The inner wall of the rotating shaft and the outer wall of the movable column are both provided with mutually cooperating threads. The oil cylinder drives the movable column to move relative to the rotating shaft through a transmission structure.

[0010] Furthermore, the transmission structure includes a plurality of V-shaped frames installed on the inner wall of the oil cylinder and distributed around the circumference of the damping box. The side wall of the V-shaped frame is provided with a guide groove that is consistent with the shape of the V-shaped frame. The end of the moving column is provided with a connecting plate, and the connecting plate is provided with a sliding column that cooperates with the guide groove.

[0011] The V-shaped frame is located close to the damping box in the middle, while both ends of the V-shaped frame are located away from the damping box.

[0012] Furthermore, adjacent V-shaped frames are connected by connecting frames, and the connecting frames are provided with transition grooves for connecting adjacent guide grooves. The transition grooves are arc-shaped with their centers coinciding with the center of the damping box sphere. The V-shaped frames and connecting frames inside the damping body form a ring.

[0013] Furthermore, a baffle plate is provided on the outer wall of the damping box for blocking part of the openings of each of the flow-limiting channels, and the baffle plate is movable on the damping box.

[0014] Furthermore, adjacent damping boxes are connected by a connecting column, which is coaxially arranged with the oil cylinder, and adjacent baffles are connected by a connecting rod.

[0015] Both ends of the oil cylinder are provided with sealing plates, and the connecting columns and connecting rods located on both sides pass through the corresponding sealing plates, and the connecting columns are rotatably mounted on the sealing plates;

[0016] The control device further includes two outer base frames for supporting the connecting columns on both sides. The connecting rods on both sides are fixed to the corresponding outer base frames. The ends of the connecting columns pass through the outer base frames and rotate relative to each other. The outer base frames are provided with fixing rings coaxially arranged with the connecting columns. The fixing rings are provided with a plurality of slots. The ends of the connecting columns are provided with locking plates that slide along the axis of the connecting columns. The locking plates cooperate with the slots. The locking plates are connected to the connecting columns by an elastic body.

[0017] Furthermore, the oil cylinder is equipped with a heat exchange unit for dissipating heat from the fluid, and the heat exchange unit consists of several air guide pipes inserted between the two sealing discs.

[0018] Furthermore, a support ring is provided on the sealing plate on one side of the oil cylinder. The support ring is located on the outside of the connecting column and the connecting rod. Two discs are arranged opposite each other on the support ring, and one end of the air guide pipe extends between the two discs.

[0019] Several flow guide plates are provided between the two discs, and the flow guide plates are fixed to the ends of the oil cylinder.

[0020] The beneficial effects of this invention are as follows:

[0021] By limiting the fluid flow rate through a flow-limiting channel, the speed of the rotating shaft and fan plate is restricted, thereby providing damping force to the coil. This facilitates control over the speed and tension of the released wire. This method avoids the wear of friction plates in traditional methods and provides stable damping force to the coil. Simultaneously, as the wire release speed increases, the fluid velocity accelerates, and the reverse restriction of the fluid by the flow-limiting channel is enhanced, thus strengthening the damping effect on the coil and keeping the wire release speed within the specified range. Since two flow-limiting channels are used to restrict the fluid entering the fan-shaped cavity, a dual damping effect can be provided to the fan plate during its movement. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 yes Figure 1 Schematic diagram of the intermediate oil tank;

[0025] Figure 3 yes Figure 2 A schematic diagram of the internal structure of the intermediate oil tank;

[0026] Figure 4 yes Figure 3 Schematic diagram of the structure of the medium damping body;

[0027] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure of the intermediate damping box;

[0028] Figure 6 yes Figure 1 A magnified view of the structure at point A in the middle;

[0029] Figure 7 yes Figure 2 A schematic diagram of the central disk and its structure.

[0030] Figure label:

[0031] 1. Wire coil; 2. Oil cylinder; 3. Damping body; 4. Damping box; 5. Rotating shaft; 6. Fan plate; 7. Moving column; 8. V-shaped frame; 9. Sliding column; 10. Connecting plate; 11. Connecting frame; 12. Cover plate; 13. Connecting column; 14. Connecting rod; 15. Sealing plate; 16. Outer base frame; 17. Fixing ring; 18. Slot; 19. Card plate; 20. Elastomer; 21. Air guide pipe; 22. Support ring; 23. Disc; 24. Drain plate; 25. Flow limiting channel. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0035] like Figures 1 to 7 As shown, a constant tension control device for wire release according to the present invention includes a wire reel 1 and an oil cylinder 2 coaxially located inside the wire reel 1 and relatively fixed therein. The oil cylinder 2 stores fluid, and a plurality of damping bodies 3 are arranged along the axial direction of the oil cylinder 2 inside the oil cylinder 2. The damping bodies 3 are used to limit the rotation speed of the wire reel 1.

[0036] The damping body 3 includes a damping box 4, a rotating shaft 5, and a fan plate 6. The oil cylinder 2 rotates relative to the damping box 4 with its own axis as the rotating shaft. A fan-shaped cavity is opened in the damping box 4. The rotating shaft 5 is coaxially arranged with the fan cavity. The rotating oil cylinder 2 drives the rotating shaft 5 to rotate on the damping box 4. The fan plate 6 is located in the fan cavity and is fixedly connected to the rotating shaft 5.

[0037] A flow-limiting channel 25 communicating with the inside of the oil cylinder 2 is provided on both sides of the fan-shaped cavity. The fluid in the oil cylinder 2 enters and exits the fan-shaped cavity through the flow-limiting channel 25.

[0038] In this invention, the fluid can be a highly viscous oil, such as mineral oil or silicone oil; the center of the coil 1 is hollow, and the oil cylinder 2 is coaxially located in the center of the coil 1, and they can be fixed together by means of pads, bolts, or other structures. In this way, when the damping body 3 provides damping for the rotational speed of the oil cylinder 2, the oil cylinder 2 can directly transmit the force to the coil 1, thereby controlling the rotational speed of the coil 1 and the release speed of the steel wire on the coil 1, and thus controlling the tension of the steel wire; the coil 1 can be supported by a bracket located on its side, and the damping body 3 is fixed relative to the bracket. Both the coil 1 and the oil cylinder 2 can rotate on the bracket.

[0039] The axis of the sector cavity inside the damping box 4 intersects and is perpendicular to the axis of the oil cylinder 2. When the rotating shaft 5 rotates, it drives the fan plate 6 to move in the sector cavity. The fluid on one side of the fan plate 6 is squeezed and enters the oil cylinder 2 through a flow-limiting channel 25. The space on the other side of the fan plate 6 increases, and the fluid in the oil cylinder 2 can enter the fan plate 6 on that side through another flow-limiting channel 25. Thus, the movement of the fan plate 6 drives the fluid flow on both sides. Based on the limitation of the fluid flow rate by the diameter of the flow-limiting channel 25, the fluid can be used to limit and impede the movement of the rotating shaft 5 and the fan plate 6, thereby achieving the effect of damping the rotation of the coil 1.

[0040] By limiting the fluid flow rate through the flow-limiting channel 25, the movement speed of the rotating shaft 5 and the fan plate 6 is restricted, thereby providing damping force to the coil 1. This facilitates control over the speed at which the coil 1 releases the wire and the tension of the wire. This method avoids the wear phenomenon of friction plates in traditional methods and provides stable damping force to the coil 1. At the same time, as the wire release speed increases, the fluid velocity accelerates, and the reverse restriction of the fluid by the flow-limiting channel 25 is enhanced, thereby strengthening the damping effect on the coil 1 and keeping the speed at which the coil 1 releases the wire within the specified range. Since two flow-limiting channels 25 are used to restrict the fluid entering the fan-shaped cavity, a dual damping effect can be provided to the fan plate 6 when it moves.

[0041] Furthermore, the rotating shaft 5 is hollow, and a movable column 7 is provided inside the rotating shaft 5. The inner wall of the rotating shaft 5 and the outer wall of the movable column 7 are both provided with mutually matching threads. The oil cylinder 2 drives the movable column 7 to move relative to the rotating shaft 5 through the transmission structure.

[0042] When the coil 1 and the oil cylinder 2 rotate, the oil cylinder 2 can provide the moving power to the moving column 7 through the transmission structure. The moving column 7 moves relative to the rotating shaft 5. Since the moving column 7 and the rotating shaft 5 are connected by a thread, the moving column 7 can drive the rotating shaft 5 to rotate. The rotating shaft 5 drives the fan plate 6 to move, thereby causing the liquid to flow between the fan-shaped cavity and the oil cylinder 2. This structure can convert the rotation of the rotating shaft 5 into the linear motion of the moving column 7, thus facilitating the transmission between the oil cylinder 2 and the moving column 7.

[0043] Furthermore, the transmission structure includes several V-shaped frames 8 installed on the inner wall of the oil cylinder 2 and distributed around the circumference of the damping box 4. The side wall of the V-shaped frame 8 is provided with a guide groove that is consistent with the shape of the V-shaped frame 8. The end of the moving column 7 is provided with a connecting plate 10, and the connecting plate 10 is provided with a sliding column 9 that cooperates with the guide groove.

[0044] The middle part of the V-shaped frame 8 is close to the damping box 4, and both ends of the V-shaped frame 8 are far away from the damping box 4.

[0045] When the fan plate 6 moves within the fan-shaped cavity, if the fan plate 6 only moves in one direction, then when it moves to the position of one side wall of the fan-shaped cavity, the fan plate 6 contacts the side wall and stops moving. That is, the fan plate 6 can only move within a specified range, and the damping body 3 can only provide damping effect for the coil 1 within a specified interval. In order to make the damping effect continuous and applicable to the continuous rotation of the coil 1, the fan plate 6 needs to be able to reciprocate within the fan-shaped cavity, that is, the moving column 7 reciprocates on the rotating shaft 5. When the oil cylinder 2 rotates, it will drive the V-shaped frame 8 to move synchronously. Since the distance between different positions on the V-shaped frame 8 and the axis of the oil cylinder 2 is not equal, the V-shaped frame 8 can push the sliding column 9 closer to or away from the axis of the oil cylinder 2. The sliding column 9 drives the moving column 7 to move relative to the rotating shaft 5 through the connecting plate 10, thereby providing power for the rotation of the rotating shaft 5.

[0046] Based on the shape characteristics of the V-shaped frame 8, when the sliding column 9 moves from one end of the V-shaped frame 8 to the other end, the sliding column 9 approaches the axis of the oil cylinder 2 and then moves away; several V-shaped frames 8 can be connected end to end, so that when the oil cylinder 2 rotates continuously, the sliding column 9 can cooperate with the guide grooves on different V-shaped frames 8, so that the moving column 7 can perform continuous reciprocating motion on the rotating shaft 5, and the rotating shaft 5 and the fan plate 6 perform continuous reciprocating motion.

[0047] Furthermore, adjacent V-shaped frames 8 are connected by connecting frames 11. The connecting frames 11 are provided with transition grooves for connecting adjacent guide grooves. The transition grooves are arc-shaped with their centers coinciding with the center of the damping box 4. Several V-shaped frames 8 and several connecting frames 11 within the damping body 3 form a ring.

[0048] When the sliding column 9 moves into the transition groove on the connecting frame 11, the distance between the sliding column 9 and the axis of the oil cylinder 2 remains constant due to the shape characteristics of the connecting frame 11. At this time, the rotating shaft 5 and the fan plate 6 stop moving. That is, the fan plate 6 stops moving after moving to one side of its stroke in the fan-shaped cavity. This causes the fan plate 6 and the fluid to change from a moving state to a stationary state. When the sliding column 9 moves from the transition groove to the next guide groove, the fan plate 6 moves in the opposite direction. This causes the fan plate 6 and the fluid to change from a stationary state to a reverse moving state. The purpose of this is to reduce the impact force of the fluid changing directly from forward flow to reverse flow, to facilitate the setting of a transition state for the fluid between the two states, and to improve the stability of the structure.

[0049] It should be noted that since the damping body 3 no longer provides damping effect to the coil 1 during the transition state, the transition state timing of several damping bodies 3 can be separated. That is, when some damping bodies 3 are in the transition state, other damping bodies 3 are in the working state. Furthermore, the working state is divided into the forward movement state of the fan plate 6 and the reverse movement state of the fan plate 6. This ensures that there is always a specified number of damping bodies 3 providing damping for the coil 1, thereby improving the stability of equipment operation.

[0050] Furthermore, a baffle plate 12 is provided on the outer wall of the damping box 4 to block part of the openings of each flow restriction channel 25, and the baffle plate 12 is movable on the damping box 4.

[0051] By adjusting the position of the baffle 12 on the damping box 4, the area of ​​the baffle 12 blocking the opening of the flow-limiting channel 25 can be adjusted, thereby adjusting the flow-limiting channel 25's ability to restrict the fluid. This facilitates the adjustment of the damping force of the damping body 3, allowing the wire reel 1 to release the wire under different tension conditions or to maintain a specified tension on the wire under different release speed conditions.

[0052] Furthermore, two adjacent damping boxes 4 are connected by a connecting column 13, which is coaxially arranged with the oil cylinder 2, and two adjacent baffles 12 are connected by a connecting rod 14.

[0053] Both ends of the oil cylinder 2 are provided with sealing plates 15. The connecting columns 13 and connecting rods 14 located on both sides pass through the corresponding sealing plates 15, and the connecting columns 13 are rotatably mounted on the sealing plates 15.

[0054] The control device also includes two outer base frames 16 for supporting the connecting columns 13 on both sides. The connecting rods 14 on both sides are fixed on the corresponding outer base frames 16. The ends of the connecting columns 13 pass through the outer base frames 16 and rotate relative to each other. The outer base frames 16 are provided with fixing rings 17 coaxially arranged with the connecting columns 13. The fixing rings 17 are provided with a plurality of slots 18. The ends of the connecting columns 13 are provided with locking plates 19 that slide along the axis of the connecting columns 13. The locking plates 19 cooperate with the slots 18. The locking plates 19 and the connecting columns 13 are connected by an elastic body 20.

[0055] The two sealing discs 15 can seal both ends of the oil cylinder 2, thereby forming a sealed space inside the oil cylinder 2. The connecting column 13 and the connecting rod 14 can restrict the sealing discs 15, causing them to move relative to the oil cylinder 2. The outer base frame 16 can support the damping boxes 4 and the baffle 12 inside the oil cylinder 2, thereby causing the oil cylinder 2 to move relative to the damping boxes 4. When it is necessary to adjust the position of the baffle 12 on the damping box 4, the clamping plate 19 can be pulled to separate from the clamping groove 18, and then the clamping plate 19 can be rotated to make the connecting column 13 and the damping boxes 4 rotate, and the damping boxes 4 move relative to the baffle 12. The elastic body 20 can provide elastic force to the clamping plate 19, so that the clamping plate 19 and the clamping groove 18 remain in a mutually clamped state.

[0056] Furthermore, the oil cylinder 2 is equipped with a heat exchange unit for dissipating heat from the fluid. The heat exchange unit consists of several air guide pipes 21 inserted between the two sealing discs 15.

[0057] Several air guide pipes 21 have their ends passing through two sealing plates 15, allowing external air to flow through them. This allows the fluid in the oil cylinder 2 to exchange heat with the air in the air guide pipes 21, enabling the air to carry away the heat generated by the fluid during its flow, thus achieving a heat dissipation effect on the fluid. This also prevents the internal heat from being unable to dissipate in time when the fluid is frequently flowing and being squeezed, which would affect the normal operation of the device.

[0058] Furthermore, a support ring 22 is provided on the sealing plate 15 on one side of the oil cylinder 2. The support ring 22 is located on the outside of the corresponding connecting column 13 and connecting rod 14. Two discs 23 are arranged opposite each other on the support ring 22. One end of the air guide pipe 21 extends between the two discs 23.

[0059] Several diversion plates 24 are provided between the two discs 23, and the diversion plates 24 are fixed to the end of the oil cylinder 2.

[0060] When the oil cylinder 2 rotates relative to the sealing plate 15, the oil cylinder 2 will drive several guide plates 24 to rotate synchronously. The guide plates 24 can squeeze the air between the two discs 23 outward or push the external air into the space between the two discs 23, thereby creating a pressure difference between the air pressure between the two discs 23 and the air pressure inside the air guide pipe 21, causing the external air to actively enter the air guide pipe 21 and flow, thus improving the heat exchange efficiency.

[0061] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A constant tension control device for releasing steel wire, characterized in that, The device includes a coil and an oil cylinder located coaxially inside the coil and relatively fixed. The oil cylinder contains fluid, and several damping bodies are arranged along the axis of the oil cylinder inside the oil cylinder. The damping bodies are used to limit the rotation speed of the coil. The damping body includes a damping box, a rotating shaft, and a fan plate. The oil cylinder rotates relative to the damping box about its own axis. A fan-shaped cavity is formed inside the damping box. The rotating shaft is coaxially arranged with the fan-shaped cavity. The rotating oil cylinder drives the rotating shaft to rotate on the damping box. The fan plate is located inside the fan-shaped cavity and is fixedly connected to the rotating shaft. A flow-limiting channel communicating with the inside of the oil cylinder is provided on both sides of the fan-shaped cavity, and the fluid in the oil cylinder enters and exits the fan-shaped cavity through the flow-limiting channel; The rotating shaft is hollow, and a movable column is provided inside the rotating shaft. The inner wall of the rotating shaft and the outer wall of the movable column are both provided with mutually cooperating threads. The oil cylinder drives the movable column to move relative to the rotating shaft through a transmission structure. The transmission structure includes several V-shaped frames installed on the inner wall of the oil cylinder and distributed around the circumference of the damping box. The side wall of the V-shaped frame is provided with a guide groove that is consistent with the shape of the V-shaped frame. The end of the moving column is provided with a connecting plate, and the connecting plate is provided with a sliding column that cooperates with the guide groove. The middle part of the V-shaped frame is close to the damping box, and both ends of the V-shaped frame are far away from the damping box. The adjacent V-shaped frames are connected by a connecting frame. The connecting frame is provided with a transition groove for connecting the two adjacent guide grooves. The transition groove is an arc with its center coinciding with the center of the damping box sphere. The V-shaped frames and the connecting frames in the damping body form a ring. When the sliding column moves into the transition groove on the connecting frame, the damping body is in a transition state. When the sliding column moves into the guide groove on the V-shaped frame, the damping body is in a working state. When some damping bodies are in the transition state, other damping bodies are in a working state. This working state is further divided into the forward movement state of the fan plate and the reverse movement state of the fan plate, thereby ensuring that there is always a specified number of damping bodies to provide damping for the coil.

2. The constant tension control device for releasing steel wire according to claim 1, characterized in that, A baffle plate is provided on the outer wall of the damping box for sealing off part of the openings of each of the flow-limiting channels, and the baffle plate is movable on the damping box.

3. The constant tension control device for releasing steel wire according to claim 2, characterized in that, The two adjacent damping boxes are connected by a connecting column, which is coaxially arranged with the oil cylinder; the two adjacent baffles are connected by a connecting rod. Both ends of the oil cylinder are provided with sealing plates, and the connecting columns and connecting rods located on both sides pass through the corresponding sealing plates, and the connecting columns are rotatably mounted on the sealing plates; The control device further includes two outer base frames for supporting the connecting columns on both sides. The connecting rods on both sides are fixed to the corresponding outer base frames. The ends of the connecting columns pass through the outer base frames and rotate relative to each other. The outer base frames are provided with fixing rings coaxially arranged with the connecting columns. The fixing rings are provided with a plurality of slots. The ends of the connecting columns are provided with locking plates that slide along the axis of the connecting columns. The locking plates cooperate with the slots. The locking plates are connected to the connecting columns by an elastic body.

4. The constant tension control device for releasing steel wire according to claim 3, characterized in that, The oil drum is equipped with a heat exchange unit for dissipating heat from the fluid. The heat exchange unit consists of several air guide pipes inserted between the two sealing discs.

5. The constant tension control device for releasing steel wire according to claim 4, characterized in that, A support ring is provided on the sealing plate on one side of the oil cylinder. The support ring is located on the outside of the connecting column and the connecting rod. Two discs are arranged opposite each other on the support ring. One end of the air guide pipe extends between the two discs. Several flow guide plates are provided between the two discs, and the flow guide plates are fixed to the ends of the oil cylinder.

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