Automatic sleeve wrapping equipment for prestressed steel bar

Abstract

The invention provides prestressed steel bar automatic sleeve wrapping equipment, and relates to the technical field of steel bar wrapping, the prestressed steel bar automatic sleeve wrapping equipment comprises a cooling box, one side of the inlet end of the cooling box is provided with an extruder, the other end of the extruder is provided with a conveying table, the conveying table conveys a steel bar body, the inlet end of the cooling box is provided with a conveying port, and the conveying port is provided with a feeding port. A conveying opening is formed in the outer end of the cooling box and corresponds to an extrusion opening of the extruder, a clamping assembly is arranged at the outer end of the cooling box and comprises a circular ring, the circular ring is arranged at the tail end of the cooling box, three sets of inserting frames are slidably inserted into the surface of the circular ring in a circle center symmetry mode, and second clamping plates are rotatably installed at the bottoms of the inserting frames through shaft rings. The three sets of clamping assemblies circularly rotate around the cooling box, the coated steel bar is clamped, cooled, cut and sent out in sequence, the overall machining efficiency is improved, all the clamping assemblies work independently and jointly rotate around the circular ring, and continuous machining can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of steel rod coating, in particular to automatic casing coating equipment for prestressed steel rods. Background Art

[0002] After the production of prestressed steel bars is completed, in order to improve their corrosion resistance, a layer of plastic is usually coated on the outside of the steel bars. Short-sized prestressed steel bars with a length of no more than 10 meters have threads of a certain length at both ends. According to the requirements, part of the threads must be exposed at both ends of the prestressed steel bars that have been coated. At present, the domestic prestressed steel bar automatic casing coating equipment adopts a principle similar to that of wire and cable equipment. The technical process includes steel bar uncoiling, oiling, coating, and coiling.

[0003] The coating equipment of the prior art has low efficiency in the continuous coating process of a single steel rod. In addition, a certain length of both ends of the steel rod needs to be exposed, and the coated parts need to be cut subsequently. However, the prior art needs to cut separately after coating, which affects the overall production efficiency. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an automatic casing covering equipment for prestressed steel bars to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. Three groups of clamping components rotate around the cooling box in a cycle, and the coated steel bars are clamped, cooled, cut and sent out in turn, thereby improving the overall processing efficiency. The clamping components work independently of each other and rotate around the ring together to achieve continuous processing.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized by the following technical scheme: an automatic casing coating equipment for prestressed steel rods, comprising a cooling box, an extruder is provided on one side of the inlet end of the cooling box, and a conveying platform is provided on the other end of the extruder, the conveying platform conveys a steel rod body, a conveying port is opened at the inlet end of the cooling box, and the conveying port corresponds to the extrusion port of the extruder, a clamping assembly is provided at the outer end of the cooling box, the clamping assembly comprises a circular ring, the circular ring is arranged at the tail end of the cooling box, and three groups of plug-in racks are symmetrically slidably plugged in the center of the circle on the surface of the circular ring, a second clamping plate is rotatably installed at the bottom of the plug-in rack through an axle ring, a first clamping plate is provided at the position corresponding to the second clamping plate at the front end of the cooling box, the two ends of the steel rod body are clamped between the first clamping plate and the second clamping plate, a spraying assembly is provided on the top of the cooling box, the spraying assembly comprises a top plate, two spraying plates are fixed at the bottom of the top plate, two groups of arc slide rails are symmetrically installed on one side of the top plate, two groups of cutters are slidably installed on the surface of the arc slide rail, and the cutters are in contact with the two ends of the steel rod body.

[0006] Furthermore, a cooling box is fixed at the bottom of the cooling box, and a connecting port is provided between the cooling box and the cooling box. The connecting port between the cooling box and the cooling box is sealed with a sealing plate, the sealing plate is fixedly connected to the top plate, a conveying pipe is fixed on the top plate, and the conveying pipe is connected to the spray plate.

[0007] Furthermore, the clamping assembly also includes a fixed frame, a fixed frame is arranged on the outer side of the tail end of the cooling box, and the ring is rotatably installed on the fixed frame, a driving motor is fixedly installed on the outer side of the fixed frame, and the output end of the driving motor is fixedly connected to the ring, and a spring is connected to the sliding connection between the bracket and the ring.

[0008] Furthermore, a first electric push rod is fixed in the horizontal direction of the rack, and a connecting plate is fixed to the extended end of the first electric push rod, a second electric push rod is fixed inside the connecting plate, and the second clamping plate is rotatably connected to the extended end of the second electric push rod through a shaft ring.

[0009] Furthermore, a shaft is rotatably mounted on the surface of the circular ring corresponding to the second clamping plate, and a second gear is fixed on the surface of the shaft, and a first gear is fixed on the cooling box at the center of the circular ring, and the second gear is meshingly connected with the first gear.

[0010] Furthermore, a socket is fixed to one end of the second clamping plate facing the shaft rod, and an insert block is slidably inserted into the socket, and the insert block is fixedly connected to the other end of the shaft rod.

[0011] Furthermore, the spray assembly also includes a third electric push rod, the third electric push rod is fixed to the top of the fixing frame, and the extended end of the third electric push rod is fixedly connected to the top plate.

[0012] Furthermore, a connecting rod is fixed between the two arc-shaped slide rails, and the other end of the connecting rod bypasses the rotation path of the insertion rack and is fixedly connected to the fixing rack.

[0013] Furthermore, a slide seat is slidably sleeved at the same straight line position on the surface of the two groups of arc-shaped slide rails, a bidirectional screw rod is rotatably installed between the two slide seats, and two screw blocks are threadedly sleeved on the surface of the bidirectional screw rod.

[0014] Furthermore, a fourth electric push rod is fixed inside the screw block, and an extended end of the fourth electric push rod is fixedly connected to the cutter.

[0015] Beneficial effects of the present invention:

[0016] 1. In the present invention, when the steel rod after cooling rotates to the highest point of the arc-shaped slide rail along with the clamping assembly, the slide seat also moves to this position, and the two-way lead screw is driven by the motor to rotate, and the two screw blocks are moved to the position where cutting is required. The fourth electric push rod brings the cutter into contact with the coating of the steel rod, and the slide seat rotates together with the clamping assembly and the steel rod body. In this process, because the steel rod body itself rotates along with the clamping assembly, the cutter can perform circular cutting on the coating on the surface of the steel rod body.

[0017] 2. When the circular ring of the present invention rotates, the second gear will move along the surface of the first gear and mesh and rotate, thereby driving the first clamping plate, the second clamping plate and the steel rod body to rotate through the shaft, the plug block and the socket, which is convenient for subsequent cutting.

[0018] 3. In the present invention, under the action of the plug and the socket, the plug and the socket inside the cooling box are vertically plugged, so that the clamping assembly can move downward under the extrusion of the top plate, and the steel rod body is extended into the water without being interfered by the shaft rod. The plug and the socket are slid apart, and when the clamping assembly is reset, the plug is reinserted into the socket, which is convenient for the subsequent rotation and cutting of the steel rod body.

[0019] 4. In the present invention, before the steel rod body is sent into the cooling box, the first electric push rod extends to push the first clamping plate outward, and the second electric push rod is retracted to avoid interfering with the movement of the steel rod body. When the steel rod body is sent out from the extruder and partially enters the cooling box through the conveying port, the second electric push rod drives the first clamping plate to descend, and the first electric push rod retracts the first clamping plate. During this process, the first clamping plate contacts the rear end of the steel rod body, which facilitates pushing the steel rod body into the cooling box and cooperates with the second clamping plate to clamp and fix it.

[0020] 5. The present invention drives the top plate to descend by the third electric push rod, so that the clamping assembly can extend into the cooling box, which is convenient for the steel rod body to better contact with the cooling water. At the same time, the sealing plate seals the connection port between the cooling box and the cooling box. When the top plate moves upward, the sealing plate is opened, and part of the water in the cooling box flows into the cooling box for cooling. The spray plate re-injects new cooling water into the cooling box, thereby avoiding the excessively high water temperature inside the cooling box affecting the cooling effect.

[0021] 6. Compared with the prior art, the present invention has three groups of clamping components that circulate around the cooling box, clamping, cooling, cutting and sending out the coated steel rods in turn, thereby improving the overall processing efficiency. Each clamping component works independently of each other and rotates around the ring together, so as to realize continuous processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of an automatic casing covering device for prestressed steel bars according to the present invention;

[0023] Figure 2 This is a schematic diagram of the cooling box tail end structure of a prestressed steel bar automatic casing coating device of the present invention;

[0024] Figure 3 This is a schematic diagram of the front end structure of a cooling box of an automatic casing covering device for prestressed steel bars of the present invention;

[0025] Figure 4 This is a schematic diagram of the connection between the arc slide rail and the top plate of the automatic casing covering equipment for prestressed steel bars of the present invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of a cooling box of an automatic casing coating device for prestressed steel bars of the present invention;

[0027] Figure 6 It is a schematic diagram of the rear end structure of a clamping assembly of an automatic casing covering device for prestressed steel bars of the present invention;

[0028] Figure 7 This is a schematic diagram of the overall structure of a clamping assembly of an automatic casing covering device for prestressed steel bars according to the present invention;

[0029] Figure 8 The present invention is a schematic diagram of the arc-shaped slide rail surface of a prestressed steel bar automatic casing covering device.

[0030] In the figure: 1, cooling box; 11, extruder; 12, conveying platform; 13, cooling box; 14, conveying port; 2, steel rod body; 3, clamping assembly; 31, fixing frame; 32, driving motor; 33, ring; 34, rack; 35, first electric push rod; 36, connecting plate; 37, second electric push rod; 38, first clamping plate; 39, first gear; 310, second gear; 311, shaft; 312, second clamping plate; 313, socket; 314, plug block; 4, spray assembly; 41, top plate; 42, spray plate; 43, conveying pipeline; 44, third electric push rod; 45, connecting rod; 46, arc slide rail; 47, two-way screw rod; 48, slide seat; 49, sealing plate; 410, screw block; 411, fourth electric push rod; 412, cutter. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] See also Figures 1 to 8The present invention provides a technical solution: an automatic casing coating device for prestressed steel rods, comprising a cooling box 1, an extruder 11 is provided on one side of the inlet end of the cooling box 1, and a conveying platform 12 is provided on the other end of the extruder 11, and a steel rod body 2 is conveyed on the conveying platform 12, and a conveying port 14 is provided at the inlet end of the cooling box 1, and the conveying port 14 corresponds to the extrusion port of the extruder 11, and a clamping component 3 is provided at the outer end of the cooling box 1, and the clamping component 3 includes a circular ring 33, and the circular ring 33 is arranged at the tail end of the cooling box 1, and three groups of plug-in racks 34 are symmetrically slidably inserted on the surface of the circular ring 33, and a second clamping plate 312 is rotatably installed at the bottom of the clamping rack 34 through an axle ring, and a first clamping plate 38 is provided at the front end of the cooling box 1 corresponding to the position of the second clamping plate 312, and the two ends of the steel rod body 2 are clamped by the first clamping plate 38 and the second clamping plate 312, a spray assembly 4 is provided on the top of the cooling box 1, and the spray assembly 4 includes a top plate 41, and two spray plates 42 are fixed at the bottom of the top plate 41, and two groups of arc slide rails 46 are symmetrically installed on one side of the top plate 41, and two groups of cutters 412 are slidably installed on the surface of the arc slide rail 46, and the cutters 412 are in contact with both ends of the steel rod body 2. When the device is used, the steel rod body 2 is sent into the extruder 11 through the conveyor table 12. The technical principle of this part is the same as the technology in patent CN101746032A. After the coating is completed, the steel rod is sent into the cooling box 1, clamped and fixed by the clamping assembly 3 and cooled in the cooling box 1. After the cooling is completed, it is rotated and sent out, and the two ends are cut on one side. After the cutting is completed, it is sent out from the other side. Three groups of clamping assemblies 3 are used for cutting, which improves the processing efficiency and maintains the continuous processing progress.

[0033] In this embodiment, a cooling box 13 is fixed to the bottom of the cooling box 1, and a connecting port is provided between the cooling box 1 and the cooling box 13. The connecting port of the cooling box 1 and the cooling box 13 is sealed with a sealing plate 49, and the sealing plate 49 is fixedly connected to the top plate 41. A delivery pipe 43 is fixed on the top plate 41, and the delivery pipe 43 is connected to the spray plate 42. The spray assembly 4 also includes a third electric push rod 44. The top of the fixing frame 31 is fixed with a third electric push rod 44, and the extended end of the third electric push rod 44 is fixedly connected to the top plate 41, and is connected to the external water source through the delivery pipe 43 to the spray plate 42. 2 delivers cooling water, which is sprayed from the top of the steel rod body 2, and the bottom of the steel rod body 2 is immersed in the cooling box 1. The third electric push rod 44 drives the top plate 41 to descend, so that the clamping assembly 3 can extend into the cooling box 1, so that the steel rod body 2 can better contact with the cooling water. At the same time, the sealing plate 49 seals the connection between the cooling box 13 and the cooling box 1. When the top plate 41 moves upward, the sealing plate 49 is opened, and part of the water in the cooling box 1 flows into the cooling box 13 for cooling. The spray plate 42 re-injects new cooling water into the cooling box 1, thereby preventing the water temperature in the cooling box 1 from being too high and affecting the cooling effect.

[0034] In this embodiment, the clamping assembly 3 also includes a fixing frame 31, a fixing frame 31 is provided on the outer side of the tail end of the cooling box 1, and a ring 33 is rotatably mounted on the fixing frame 31, a driving motor 32 is fixedly mounted on the outer side of the fixing frame 31, and the output end of the driving motor 32 is fixedly connected to the ring 33, a spring is connected to the sliding connection between the plug-in frame 34 and the ring 33, a first electric push rod 35 is fixed in the horizontal direction of the plug-in frame 34, and a connecting plate 36 is fixed to the extended end of the first electric push rod 35, a second electric push rod 37 is fixed inside the connecting plate 36, and the second clamping plate 312 is connected to the second electric push rod 37 through a shaft ring. The extended end of the push rod 37 is rotatably connected to the protruding end. Before the steel rod body 2 is sent into the cooling box 1, the first electric push rod 35 is extended to push the first clamping plate 38 outward, and the second electric push rod 37 is retracted to avoid interfering with the movement of the steel rod body 2. When the steel rod body 2 is sent out from the extruder 11 and partially enters the cooling box 1 through the conveying port 14, the second electric push rod 37 drives the first clamping plate 38 to descend, and the first electric push rod 35 retracts the first clamping plate 38. During this process, the first clamping plate 38 contacts the rear end of the steel rod body 2, which facilitates pushing the steel rod body 2 into the cooling box 1, and cooperates with the second clamping plate 312 to clamp and fix it.

[0035] In this embodiment, the ring 33 is rotatably mounted with a shaft 311 on the surface of the second clamping plate 312, and a second gear 310 is fixed on the surface of the shaft 311. The cooling box 1 is fixed with a first gear 39 at the center of the ring 33, and the second gear 310 is meshed with the first gear 39. A socket 313 is fixed to one end of the second clamping plate 312 facing the shaft 311, and a plug block 314 is slidably inserted inside the socket 313. The plug block 314 is fixedly connected to the other end of the shaft 311. When the ring 33 rotates, the second gear 310 will move along the surface of the first gear 39 and mesh and rotate, thereby The first clamping plate 38, the second clamping plate 312 and the steel rod body 2 are driven to rotate by the shaft 311, the plug block 314 and the socket 313, which is convenient for subsequent cutting. Under the action of the plug block 314 and the socket 313, the plug block 314 and the socket 313 located inside the cooling box 1 are vertically plugged, so that the clamping assembly 3 can move downward under the squeezing action of the top plate 41, and the steel rod body 2 is extended into the water without being interfered by the shaft 311. The plug block 314 and the socket 313 are slid apart. When the clamping assembly 3 is reset, the plug block 314 is reinserted into the socket 313, which is convenient for subsequent rotation and cutting of the steel rod body 2.

[0036] In this embodiment, a connecting rod 45 is fixed between the two arc-shaped slide rails 46, and the other end of the connecting rod 45 bypasses the rotation path of the insertion frame 34 and is fixedly connected to the fixed frame 31. A slide seat 48 is slidably sleeved at the same straight line position on the surface of the two groups of the arc-shaped slide rails 46, and a bidirectional screw rod 47 is rotatably installed between the two slide seats 48. Two screw blocks 410 are threadedly sleeved on the surface of the bidirectional screw rod 47. A fourth electric push rod 411 is fixed inside the screw block 410, and the extended end of the fourth electric push rod 411 is fixedly connected to the cutter 412. Here, the slide seat 48 slides along the arc-shaped slide rail 46 by itself through an existing driving device, such as an existing electric pulley and a track slide. In the dynamic mode, when the cooled steel rod rotates to the highest point of the arc-shaped slide rail 46 along with the clamping assembly 3, the slide 48 also moves to this position, and the two-way screw rod 47 is driven by the motor to rotate, and the two screw blocks 410 are moved to the position where cutting is required. The fourth electric push rod 411 makes the cutter 412 contact with the coating of the steel rod, and the slide 48 rotates with the clamping assembly 3 and the steel rod body 2. In this process, because the steel rod body 2 itself rotates along with the clamping assembly 3, the cutter 412 can perform annular cutting on the coating on the surface of the steel rod body 2. The arc-shaped slide rail 46 is connected to the fixed frame 31 through the connecting rod 45, bypassing the position of the insertion frame 34, so there will be no movement interference.

[0037] When the device is used, the steel rod body 2 is fed into the extruder 11 through the conveying platform 12. After the coating is completed, the steel rod is fed into the cooling box 1. Before the steel rod body 2 is fed into the cooling box 1, the first electric push rod 35 extends to push the first clamping plate 38 outward, and the second electric push rod 37 is retracted to avoid interfering with the movement of the steel rod body 2. When the steel rod body 2 is fed out of the extruder 11 and partially enters the cooling box 1 through the conveying port 14, the second electric push rod 37 drives the first clamping plate 38 to descend, and the first electric push rod 35 pushes the first clamping plate 38 outward. The plate 38 is retracted. During this process, the first clamping plate 38 contacts the rear end of the steel bar body 2, which facilitates pushing the steel bar body 2 into the cooling box 1, and cooperates with the second clamping plate 312 to clamp and fix it. The steel bar body 2 is connected to the external water source through the delivery pipe 43, and cooling water is delivered to the spray plate 42, sprayed from the top of the steel bar body 2, and the bottom of the steel bar body 2 is immersed in the cooling box 1. The top plate 41 is driven to descend by the third electric push rod 44, so that the clamping assembly 3 can be extended into the cooling box 1, which is convenient for the steel bar body 2 to better contact with the cooling water. The sealing plate 49 seals the connection port of the cooling box 13 and the cooling box 1. When the top plate 41 moves upward, the sealing plate 49 is opened, and the water inside the cooling box 1 flows into the cooling box 13 for cooling. The spray plate 42 re-injects new cooling water into the cooling box 1, thereby preventing the internal water temperature of the cooling box 1 from being too high and affecting the cooling effect. After the cooling is completed, the steel rod is rotated and sent out. When the steel rod after cooling rotates to the highest point of the arc-shaped slide rail 46 along with the clamping assembly 3, the slide seat 48 also moves to this position, and is driven by the motor. The bidirectional screw rod 47 rotates to move the two screw blocks 410 to the position where cutting is required, and the fourth electric push rod 411 brings the cutter 412 into contact with the coating of the steel rod, and the slide 48 rotates in a circle together with the clamping assembly 3 and the steel rod body 2. During this process, because the steel rod body 2 itself rotates with the clamping assembly 3, the cutter 412 can perform a circular cut on the coating on the surface of the steel rod body 2, and it is sent out from the other side after cutting. Three sets of clamping assemblies 3 are used for cutting to improve processing efficiency and maintain continuous processing progress.

[0038] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic casing coating device for prestressed steel bars, comprising a cooling box (1), characterized in that: An extruder (11) is provided at one side of the inlet end of the cooling box (1), and a conveying platform (12) is provided at the other end of the extruder (11), and the conveying platform (12) conveys the steel rod body (2). A conveying port (14) is provided at the inlet end of the cooling box (1), and the conveying port (14) corresponds to the extrusion port of the extruder (11). A clamping assembly (3) is provided at the outer end of the cooling box (1), and the clamping assembly (3) includes a circular ring (33), and the circular ring (33) is arranged at the rear end of the cooling box (1), and three groups of plug-in racks (34) are symmetrically slidably inserted on the surface of the circular ring (33), and the bottom of the plug-in rack (34) is rotatably installed with a first The cooling box (1) has two clamping plates (312), a first clamping plate (38) is provided at the front end of the cooling box (1) at a position corresponding to the second clamping plate (312), and the two ends of the steel rod body (2) are clamped between the first clamping plate (38) and the second clamping plate (312). A spray assembly (4) is provided on the top of the cooling box (1), and the spray assembly (4) includes a top plate (41), and two spray plates (42) are fixed at the bottom of the top plate (41). Two groups of arc-shaped slide rails (46) are symmetrically installed on one side of the top plate (41), and two groups of cutters (412) are slidably installed on the surface of the arc-shaped slide rails (46), and the cutters (412) are in contact with the two ends of the steel rod body (2).

2. The automatic casing covering equipment for prestressed steel bars according to claim 1 is characterized in that: A cooling box (13) is fixed at the bottom of the cooling box (1), and a connecting port is provided between the cooling box (1) and the cooling box (13). The connecting port between the cooling box (1) and the cooling box (13) is sealed with a sealing plate (49), the sealing plate (49) is fixedly connected to the top plate (41), a conveying pipe (43) is fixed on the top plate (41), and the conveying pipe (43) is connected to the spray plate (42).

3. The automatic casing covering equipment for prestressed steel bars according to claim 1 is characterized in that: The clamping assembly (3) also includes a fixing frame (31), the fixing frame (31) is arranged on the outer side of the tail end of the cooling box (1), and the ring (33) is rotatably mounted on the fixing frame (31), a driving motor (32) is fixedly mounted on the outer side of the fixing frame (31), and the output end of the driving motor (32) is fixedly connected to the ring (33), and a spring is connected to the sliding connection between the inserting frame (34) and the ring (33).

4. The automatic casing covering equipment for prestressed steel bars according to claim 3 is characterized in that: A first electric push rod (35) is fixed in the horizontal direction of the insertion rack (34), and a connecting plate (36) is fixed to the extended end of the first electric push rod (35), a second electric push rod (37) is fixed inside the connecting plate (36), and the second clamping plate (312) is rotatably connected to the extended end of the second electric push rod (37) through a shaft ring.

5. The automatic casing covering equipment for prestressed steel bars according to claim 4 is characterized in that: A shaft (311) is rotatably mounted on the surface of the circular ring (33) corresponding to the second clamping plate (312), and a second gear (310) is fixed on the surface of the shaft (311); a first gear (39) is fixed on the cooling box (1) at the center of the circular ring (33), and the second gear (310) is meshingly connected with the first gear (39).

6. The automatic casing covering equipment for prestressed steel bars according to claim 5 is characterized in that: A socket (313) is fixed to one end of the second clamping plate (312) facing the shaft rod (311), and an insert block (314) is slidably inserted inside the socket (313), and the insert block (314) is fixedly connected to the other end of the shaft rod (311).

7. The automatic casing covering equipment for prestressed steel bars according to claim 3 is characterized in that: The spray assembly (4) further comprises a third electric push rod (44), the third electric push rod (44) is fixed on the top of the fixing frame (31), and the extended end of the third electric push rod (44) is fixedly connected to the top plate (41).

8. The automatic casing covering equipment for prestressed steel bars according to claim 7 is characterized in that: A connecting rod (45) is fixed between the two arc-shaped slide rails (46), and the other end of the connecting rod (45) bypasses the rotation path of the inserting frame (34) and is fixedly connected to the fixing frame (31).

9. The automatic casing covering equipment for prestressed steel bars according to claim 8, characterized in that: A slide seat (48) is slidably sleeved at the same straight line position on the surface of the two groups of arc-shaped slide rails (46), a bidirectional screw rod (47) is rotatably installed between the two slide seats (48), and two screw blocks (410) are threadedly sleeved on the surface of the bidirectional screw rod (47).

10. The automatic casing covering equipment for prestressed steel bars according to claim 9, characterized in that: A fourth electric push rod (411) is fixed inside the screw block (410), and an extended end of the fourth electric push rod (411) is fixedly connected to the cutter (412).

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