Electric hydraulic bending device and method for steel strand

Abstract

The invention discloses an electric hydraulic bending device and method for a steel strand, and belongs to the field of pole and tower stay wire steel strand bending. The electric hydraulic bending device for the steel strand comprises an electric hydraulic push rod device, a bending device is installed at the output end of the electric hydraulic push rod device, and a mold plate is installed on the side wall of the electric hydraulic push rod device; the bending device comprises a push rod, a U-shaped rod is installed at the end of the push rod, two cylindrical rods are symmetrically installed at one end of the U-shaped rod, inserting holes are formed in the ends, away from the U-shaped rod, of the cylindrical rods, bolts are detachably connected to the middles of the inserting holes, rolling wheels are rotationally connected to the outer sides of the cylindrical rods, and through holes are formed in the middles of the rolling wheels. The through hole is matched with the cylindrical rod, so that the problems that manual bending of the steel strand wastes time and labor, and the steel strand is not bent in place easily are solved, and the problems that two workers need to be matched for bending the steel strand through a simple tool, and the operation convenience is poor are solved.

Description

Technical Field

[0001] This invention relates to the field of bending steel strands for tower guy wires, and more specifically, to an electro-hydraulic bending device and method for steel strands. Background Technology

[0002] In the construction of power transmission line projects, the steel strands of the tower guy wires need to be bent and then inserted into the clamps to complete the tower guy wire work. However, the current method of bending steel strands is usually done manually. Manual bending is prone to incomplete bending, which can cause the steel strands to fail to be threaded into the clamps. The quality of the wire pulling is unstable due to the influence of the personnel's skills. While bending steel strands with simple tools is relatively labor-saving, using purely manual mechanical bending tools requires two operators: one to hold the tool and the steel strand, and the other to apply force using leverage to achieve bending. Although this method is less labor-intensive than manual bending, the tool design is not ergonomic, resulting in poor ease of operation. Furthermore, it lacks a standardized angle control structure, leading to slow operation and failing to meet the demands of efficient construction. Therefore, it is necessary to design an electric bending device for steel strands. Summary of the Invention

[0003] In view of the problems existing in the prior art, the purpose of the present invention is to provide an electric hydraulic bending device and method for steel strands, so as to solve the problems that manual bending of steel strands is time-consuming and laborious and prone to incomplete bending, and to solve the problems that bending steel strands with simple tools requires two workers to cooperate and has poor operation convenience.

[0004] To solve the above problems, the present invention adopts the following technical solution.

[0005] An electro-hydraulic bending device for steel strand includes an electro-hydraulic push rod device, a bending device installed at the output end of the electro-hydraulic push rod device, a mold plate installed on the side wall of the electro-hydraulic push rod device, and a blocking device installed on the mold plate at the central axis position of the bending device. The bending device includes a push rod with a U-shaped rod at one end. Two cylindrical rods are symmetrically installed at one end of the U-shaped rod. A socket is installed at the end of the cylindrical rod away from the U-shaped rod. A pin is detachably connected to the middle of the socket. A roller is rotatably connected to the outside of the cylindrical rod. A through hole is opened in the middle of the roller, and the through hole matches the cylindrical rod.

[0006] Furthermore, the blocking device includes a support block with a rectangular groove in the middle. Rotating holes are provided at both the upper and lower ends of the rectangular groove in the middle of the support block. A rotating rod is rotatably connected to the middle of the rotating hole. A support plate is installed at the outer end of the rotating rod. A top block is installed at the end of the support plate away from the mold plate. A screw hole is provided at the end of the rectangular groove in the middle of the support block away from the bending device. A bolt is threaded into the screw hole, so that the electro-hydraulic device can release the jammed steel strand by unscrewing the bolt in the event of an accidental power failure and lockup.

[0007] Furthermore, the end of the top block near the bending device is arc-shaped, and the width of the end of the top block near the bending device is greater than the width of the end of the top block away from the bending device. This increases the contact area between the top block and the steel strand, avoids stress concentration during bending that could damage the steel strand, and ensures that the arc at the bend of the steel strand is smooth and standardized.

[0008] Furthermore, the top block has an arc-shaped groove in the middle of one end near the bending device, and an annular groove is provided on the outer side of the roller. The arc-shaped groove and the annular groove on the outer side of the roller cooperate with each other to effectively limit and clamp the steel strand, prevent the steel strand from slipping longitudinally during high-pressure bending, and improve construction safety and bending accuracy.

[0009] Furthermore, the internal materials of the bending device, mold plate, and blocking device are all hot-formed steel, which improves the overall structural strength and wear resistance of the device, enabling it to withstand high-intensity hydraulic loads without easily deforming and extending the service life of the device.

[0010] A method for electro-hydraulic bending of steel strand includes the following steps: S1: Adjusting and fixing the blocking device: Select a roller of appropriate size and install it on the outside of the column rod. Insert the pin into the hole to limit the roller. Then screw the bolt into the rectangular groove so that the end of the bolt limits the support plate, so that the top block is limited and fixed, ensuring that the blocking device is stable. S2: Place the steel strand: Pass the steel strand to be bent between the bending device and the blocking device, so that it is located between the roller and the top block; at the same time, place the bending point of the steel strand into the arc groove of the top block near the end of the bending device, and use the top block as the bending fulcrum. S3: Start power drive: Start the electric hydraulic push rod device, so that its output end pushes the push rod in the bending device to move forward; S4: Bending: The push rod drives the U-shaped rod and the rollers on both sides to move towards the blocking device. The outer annular groove of the roller presses against the steel strand, forcing the steel strand to deform around the arc-shaped end of the top block until the predetermined bending angle is reached.

[0011] Compared with the prior art, the advantages of this invention are: To address the shortcomings of manual bending of steel strands, such as being time-consuming and labor-intensive, prone to incomplete bending, and having inconsistent wire drawing quality due to the influence of personnel skills, this invention uses an electric hydraulic push rod device as the drive source. The output end pushes the bending device to work in conjunction with the blocking device installed on the mold plate. The push rod drives the roller to apply a stable and powerful hydraulic thrust, forcing the steel strand to bend into place around the top block in one go. This effectively avoids bending angle deviations caused by insufficient manpower, ensures that the steel strand can be smoothly passed into the wire clamp, and significantly improves the standardization of wire drawing and the stability of finished product quality. To address the shortcomings of simple tools that require two people to bend steel strands, have poor operational convenience, and are slow, this invention achieves stable clamping and positioning of the steel strands through the cooperation of the arc-shaped groove on the top block and the annular groove on the outer side of the roller; at the same time, bolts are used to lock the support plate in the rectangular groove, eliminating the need for manual assistance in fixing; the operator only needs to install the steel strands and start the electric hydraulic push rod device to achieve independent operation, which greatly simplifies the operation process and significantly improves the construction efficiency of power transmission line projects. Attached Figure Description

[0012] Figure 1 This is an overall perspective view of the present invention; Figure 2 This is a perspective view of the bending device of the present invention; Figure 3 This is a split perspective view of the bending device of the present invention; Figure 4 This is a partial half-sectional perspective view of the mold plate and blocking device of the present invention; Figure 5 This is a partial half-section perspective view of the mold plate and blocking device of the present invention; Figure 6 This is a schematic diagram of the working state of the present invention.

[0013] Explanation of the labels in the diagram: 1. Electro-hydraulic push rod device; 2. Bending device; 201. Push rod; 202. U-shaped rod; 203. Column rod; 204. Insertion hole; 205. Pin; 206. Roller; 207. Through hole; 3. Mold plate; 4. Blocking device; 401. Support block; 402. Rectangular groove; 403. Rotating hole; 404. Rotating rod; 405. Support plate; 406. Top block; 407. Arc groove; 408. Screw hole; 409. Bolt. Detailed Implementation

[0014] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0015] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within a compatible component. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0017] Example 1 This embodiment illustrates the structure of the device and its beneficial effects: Please see Figures 1-6 An electro-hydraulic bending device for steel strand includes an electro-hydraulic push rod device 1, a bending device 2 installed at the output end of the electro-hydraulic push rod device, a mold plate 3 installed on the side wall of the electro-hydraulic push rod device 1, and a blocking device 4 installed on the mold plate 3 at the central axis position of the bending device 2. The bending device 2 includes a push rod 201, a U-shaped rod 202 is installed at the end of the push rod 201, two columnar rods 203 are symmetrically installed at one end of the U-shaped rod 202, an insertion hole 204 is installed at the end of the columnar rod 203 away from the U-shaped rod 202, a pin 205 is detachably connected to the middle of the insertion hole 204, and a roller 206 is rotatably connected to the outside of the columnar rod 203. A through hole 207 is opened in the middle of the roller 206, and the through hole 207 matches the columnar rod 203. The blocking device 4 includes a support block 401. A rectangular groove 402 is provided in the middle of the support block 401. Rotating holes 403 are provided at both the upper and lower ends of the rectangular groove 402 in the middle of the support block 401. A rotating rod 404 is rotatably connected to the middle of the rotating hole 403. A support plate 405 is installed at the outer end of the rotating rod 404. A top block 406 is installed at the end of the support plate 405 away from the mold plate 3. A screw hole 408 is provided at the end of the support block 401 away from the bending device 2 in the rectangular groove 402. A bolt 409 is threadedly connected to the screw hole 408, so that the electro-hydraulic device 1 can release the jammed steel strand by unscrewing the bolt 409 in the event of an accidental power failure and locking. The top block 406 is arc-shaped at one end near the bending device 2, and the width of the top block 406 at the end near the bending device 2 is greater than that at the end away from the bending device 2. This increases the contact area between the top block 406 and the steel strand, avoids stress concentration during bending which could damage the steel strand, and ensures that the arc at the bend of the steel strand is round and standardized. An arc-shaped groove 407 is provided in the middle of one end of the top block 406 near the bending device 2, and an annular groove is provided on the outer side of the roller 206. The arc-shaped groove 407 and the annular groove on the outer side of the roller 206 cooperate with each other to effectively limit and clamp the steel strand, prevent the steel strand from slipping longitudinally during high-pressure bending, and improve construction safety and bending accuracy. The internal materials of the bending device 2, the mold plate 3, and the blocking device 4 are all hot-formed steel, which improves the overall structural strength and wear resistance of the device, enabling it to withstand high-intensity hydraulic loads without easily deforming and extending the service life of the device. Example 2

[0018] This embodiment illustrates the working steps of the method: A method for electro-hydraulic bending of steel strand includes the following steps: S1: Adjusting and fixing the blocking device: Select a roller 206 of appropriate size and install it on the outside of the column rod 203. Insert the pin 205 into the insertion hole 204 to limit the roller 206. Then screw the bolt 409 into the rectangular groove 402 so that the end of the bolt 409 limits the support plate 405, so that the top block 406 is limited and fixed, ensuring that the blocking device 4 is stable. S2: Place the steel strand: Pass the steel strand to be bent between the bending device 2 and the blocking device 4, so that it is located between the roller 206 and the top block 406; at the same time, place the bending point of the steel strand into the arc groove 407 of the top block 406 near the end of the bending device 2, and use the top block 406 as the bending fulcrum. S3: Start power drive: Start the electric hydraulic push rod device 1, so that its output end pushes the push rod 201 in the bending device 2 to move forward; S4: Bending: Push rod 201 drives U-shaped rod 202 and rollers 206 on both sides to move towards blocking device 4. The outer annular groove of roller 206 presses against the steel strand, forcing the steel strand to deform around the arc-shaped end of top block 406 until the predetermined bending angle is reached.

[0019] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A steel strand electro-hydraulic bending device, comprising an electro-hydraulic push rod device (1), characterized in that: The output end of the electric hydraulic push rod device (1) is equipped with a bending device (2), the side wall of the electric hydraulic push rod device (1) is equipped with a mold plate (3), and the mold plate (3) is equipped with a blocking device (4) at the central axis position of the bending device (2). The bending device (2) includes a push rod (201), a U-shaped rod (202) is installed at the end of the push rod (201), two columnar rods (203) are symmetrically installed at one end of the U-shaped rod (202), a socket (204) is installed at the end of the columnar rod (203) away from the U-shaped rod (202), a pin (205) is detachably connected to the middle of the socket (204), a roller (206) is rotatably connected to the outside of the columnar rod (203), and a through hole (207) is opened in the middle of the roller (206), the through hole (207) is matched with the columnar rod (203).

2. The electro-hydraulic bending device for steel strand according to claim 1, characterized in that: The blocking device (4) includes a support block (401), a rectangular groove (402) is provided in the middle of the support block (401), and a rotating hole (403) is provided at both the upper and lower ends of the rectangular groove (402) in the middle of the support block (401). A rotating rod (404) is rotatably connected in the middle of the rotating hole (403), and a support plate (405) is installed at the outer end of the rotating rod (404). A top block (406) is installed at the end of the support plate (405) away from the mold plate (3). A screw hole (408) is provided in the middle of the support block (401) at the end of the rectangular groove (402) away from the bending device (2), and a bolt (409) is threaded into the screw hole (408).

3. The electro-hydraulic bending device for steel strand according to claim 2, characterized in that: The top block (406) is arc-shaped at one end near the bending device (2), and the width of the top block (406) at the end near the bending device (2) is greater than the width of the top block (406) at the end away from the bending device (2).

4. The electro-hydraulic bending device for steel strand according to claim 3, characterized in that: The top block (406) has an arc-shaped groove (407) in the middle of one end near the bending device (2), and an annular groove is provided on the outer side of the roller (206).

5. The electro-hydraulic bending device for steel strand according to claim 1, characterized in that: The internal materials of the bending device (2), the mold plate (3) and the blocking device (4) are all hot-formed steel.

6. The electro-hydraulic bending method for steel strand according to claim 2, characterized in that: Includes the following steps: S1: Adjusting and fixing the blocking device: Select a roller (206) of appropriate size and install it on the outside of the column rod (203). Insert the pin (205) into the socket (204) to limit the roller (206). Then screw the bolt (409) into the rectangular groove (402) so that the end of the bolt (409) limits the support plate (405) so that the top block (406) is limited and fixed, ensuring that the blocking device (4) is stable. S2: Place the steel strand: Pass the steel strand to be bent between the bending device (2) and the blocking device (4) so ​​that it is located between the roller (206) and the top block (406); at the same time, place the bending point of the steel strand into the arc groove (407) of the top block (406) near the end of the bending device (2), and use the top block (406) as the bending fulcrum; S3: Start the power drive: Start the electric hydraulic push rod device (1) so that its output end pushes the push rod (201) in the bending device (2) to move forward; S4: Bending: The push rod (201) drives the U-shaped rod (202) and the rollers (206) on both sides to move towards the blocking device (4). The outer annular groove of the roller (206) presses against the steel strand, forcing the steel strand to deform around the arc-shaped end of the top block (406) until the predetermined bending angle is reached.

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