A flaring device based on MPP cable pipe production

Abstract

The present invention discloses a technical field involving cable tube production equipment, specifically a flaring device based on MPP cable tube production, comprising a transmission base, a transmission chain plate rotatably installed on the inner side of the transmission base, a plurality of groups of lower clamping seats equidistantly fixedly installed on the transmission chain plate, the number of each group of lower clamping seats being two, a cable tube body being placed across the upper ends of the two lower clamping seats in each group, a reinforcing plate being fixedly installed on the upper end of one side plate of the transmission base, inclined surfaces being provided at both ends of the reinforcing plate, and a support platform being fixedly installed on the outer side surface of the transmission base. The beneficial effects of the present invention are as follows: the cable tube body is placed across the upper end of the lower clamping seat at one end of the transmission base, and the cable tube body is transmitted by the transmission chain plate; when the end of the cable tube body to be expanded is aligned with the heating port of the heating device, the heating device is sleeved on the end of the cable tube body to be expanded, and the end of the cable tube body to be expanded is heated.

Description

Technical Field

[0001] The present invention relates to the technical field of cable tube production equipment, and in particular to a expanding device based on the production of MPP cable tubes. Background Art

[0002] MPP cable conduit, made primarily from modified polypropylene, is ideal for laying pipes and cables in specialized locations such as roads, railways, buildings, and riverbeds, eliminating the need for extensive dredging, excavation, or road surface damage. During the production and processing of MPP cable conduit, after the conduit is cut and segmented, one end of each group of conduit must be flared to facilitate later docking. This flaring process requires the use of a specialized flaring device.

[0003] When flaring MPP cable conduit, the conduit is typically heated and expanded before the flaring process. However, existing flaring equipment is unable to clean impurities from the inner sidewall of the flared end of the cable conduit during flaring. If the impurities are numerous or large, these impurities can easily affect the quality of the post-flaring molding process, and in severe cases, can directly damage the conduit. Furthermore, since the conduit is heated before flaring, this can cause the flaring punch to adhere to the conduit. Separating the punch from the conduit can damage the flared portion of the conduit, hindering practical processing. Summary of the Invention

[0004] The object of the present invention is to provide a flaring device based on the production of MPP cable pipes to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flaring device based on the production of MPP cable tubes, comprising a transmission base, a transmission chain plate is rotatably installed on the inner side of the transmission base, a plurality of groups of lower clamping seats are fixedly installed at equal intervals on the transmission chain plate, the number of each group of lower clamping seats is two, and the upper ends of the two lower clamping seats in each group are placed across the cable tube body, a reinforcing plate is fixedly installed on the upper end of one side plate of the transmission base, inclined surfaces are provided at both ends of the reinforcing plate, a support platform is fixedly installed on the outer side surface of the transmission base, a forward and backward moving mechanism is installed on the upper end of the support platform, a heating device and a rotating transmission mechanism are respectively installed on the forward and backward moving mechanism, a flaring punch is installed on the end of the rotating transmission mechanism close to the transmission chain plate, and a cleaning mechanism for cleaning the inner wall of one end of the cable tube body is installed on the end of the flaring punch close to the transmission chain plate;

[0006] The cleaning mechanism includes a supporting transverse plate arranged in the inner cavity of the flaring punch, one end of the supporting transverse plate sequentially passes through one end of the inner cavity of the flaring punch and the inner cavity of the rotating cylinder and is fixedly connected to the inner side wall of the U-shaped frame, the other end of the supporting transverse plate is fixedly connected to a circular block, and an air blowing cleaning mechanism is fixedly installed on the end of the flaring punch close to the conveying chain plate, the air blowing cleaning mechanism is sleeved on the outer side of the circular block, and a brush cleaning mechanism that can shake back and forth is installed on the side of the air blowing cleaning mechanism away from the flaring punch;

[0007] The air blowing cleaning mechanism includes an annular seat fixedly mounted on one end of the flaring punch near the conveying chain plate, an annular cavity is opened on the inner side of the annular seat, and a plurality of air jets are fixedly mounted in an annular array on the side of the annular seat away from the flaring punch, an annular sealing cover is fixedly mounted on the outer side of the circular block, the annular sealing cover is clamped with the inner side of the annular seat, the cross section of the annular sealing cover is L-shaped, and a seal is performed between the annular sealing cover and the opening of the annular cavity;

[0008] The annular sealing cover is symmetrically fixed with connecting air pipes, and mounting grooves are symmetrically opened on both sides of the supporting horizontal plate. The two connecting air pipes are respectively installed in the two mounting grooves. The two connecting air pipes both pass through the U-shaped frame and extend to the outside. One end of the two connecting air pipes away from the annular sealing cover is connected to a three-way joint. One port of the three-way joint is connected to one end of the hose, and the other end of the hose is connected to the air outlet end of the air pump;

[0009] The brush cleaning mechanism includes a positioning frame arranged on a side of the annular seat away from the flaring punch, a hemispherical rotating block is symmetrically fixedly connected to the side of the positioning frame close to the circular block, and a hemispherical fixed block is symmetrically fixedly connected to the side of the circular block close to the positioning frame. The side of the positioning frame is an annular array with multiple sliding rods inserted through it, one end of the sliding rod passes through the positioning frame and is fixedly connected to the annular seat, the other end of the sliding rod is sleeved with a return spring, and the end of the sliding rod away from the annular seat is fixedly sleeved with an anti-slip ring, the two ends of the return spring are respectively abutted against the positioning frame and the anti-slip ring, the positioning frame is slidably connected to the slide rod, and the side of the positioning frame away from the circular block is fixedly connected to a brush cylinder.

[0010] Preferably, the forward and backward moving mechanism includes an L-shaped transmission plate mounted on the upper end of the support platform for forward and backward sliding, a hydraulic cylinder is fixedly mounted on one side of the L-shaped transmission plate, the hydraulic cylinder is fixedly mounted on the upper end of the support platform, a convex groove is provided on the upper end of the support platform, a convex block is fixedly mounted on the lower end of the L-shaped transmission plate, the convex block is connected to the convex groove for forward and backward sliding, and the heating device is fixedly mounted on one side of the L-shaped transmission plate close to the conveying chain plate.

[0011] Preferably, a rotary circular hole is formed through the side surface of the L-shaped transmission plate. The rotary transmission mechanism includes a U-shaped frame fixedly installed on the side surface of the L-shaped transmission plate. The U-shaped frames are distributed on the inner side wall of the L-shaped transmission plate. A rotary cylinder is rotatably installed in the rotary circular hole. Both ends of the rotary cylinder respectively penetrate through both ends of the rotary circular hole. One end of the rotary cylinder extends to the inner side of the U-shaped frame. An external gear ring is fixedly sleeved on the end of the rotary cylinder located inside the U-shaped frame. A gear is meshed with the side surface of the external gear ring. The gear is driven by the motor shaft of a servo motor fixedly installed on the outer side of the U-shaped frame. A limiting ring plate is fixedly sleeved on the end of the rotary cylinder close to the conveyor chain plate.

[0012] Preferably, a plurality of docking insertion rods are fixedly connected in an annular array at one end of the rotary cylinder close to the flaring punch. A connecting ring seat is fixedly sleeved on the outer side of one end of the flaring punch close to the rotary cylinder. A plurality of docking holes are formed in an annular array at one end of the flaring punch close to the rotary cylinder. The number of the docking holes matches the number of the docking insertion rods. The docking insertion rods are inserted into the docking holes. A fixed connection is provided between the connecting ring seat and the limiting ring plate.

[0013] Preferably, an L-shaped support seat is fixedly installed at the upper end of the support table. The upper end of the L-shaped support seat extends directly above the flaring punch. A clamping mechanism for locking the cable pipe body is installed at the upper inner side of the L-shaped support seat.

[0014] Preferably, the clamping mechanism includes a pushing component fixedly installed at the upper inner side of the L-shaped support seat. A pressing-down component is installed at one end of the pushing component away from the L-shaped transmission plate.

[0015] The pushing component includes a rectangular cylinder fixedly installed at the upper inner side of the L-shaped support seat. A rectangular rod is movably inserted through the inner cavity of the rectangular cylinder. A round rod is fixedly connected to one end of the rectangular rod close to the L-shaped transmission plate. A buffer spring and an extrusion sleeve are sequentially sleeved on the round rod. Both ends of the buffer spring respectively abut against the rectangular rod and the extrusion sleeve. The extrusion sleeve is slidably connected to the round rod. The lower end of the extrusion sleeve is fixedly connected to the upper end of the L-shaped transmission plate. The other end of the rectangular rod away from the L-shaped transmission plate is rotatably installed with a pressing-down movable arm through a hinge. The other end of the pressing-down movable arm away from the rectangular rod is connected to the pressing-down component.

[0016] Preferably, the pressing-down component includes an upper clamping seat connected to the lower end of the pressing-down movable arm through a hinge. A clamping pad is fixedly installed at the lower end of the upper clamping seat. A clamping groove is formed at the lower end of the clamping pad. The clamping groove of the clamping pad is stuck on the upper end of the cable pipe body. Optical rods are symmetrically fixedly connected to the upper end of the upper clamping seat. The upper ends of the optical rods penetrate through the upper end of the L-shaped support seat upward and extend to the outside. A positioning ring and an upper pushing spring are movably sleeved on the upper ends of the optical rods from top to bottom. The positioning ring is fixedly connected to the upper end of the optical rod. Both ends of the upper pushing spring respectively abut against the upper end of the L-shaped support seat and the positioning ring. The optical rods are slidably connected to the L-shaped support seat up and down.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. During operation, the cable tube body is placed across the upper end of the lower clamping seat at one end of the transmission base, and the cable tube body is transmitted by the transmission chain plate; when the end of the cable tube body to be expanded is aligned with the heating port of the heating device, the heating device is put on the end of the cable tube body to be expanded to heat the end of the cable tube body to be expanded.

[0019] 2. After the end of the cable tube body to be expanded is heated, it is transferred to the bottom of the pressing assembly by the conveyor chain plate so that the end of the cable tube body to be expanded is aligned with the expanding punch; the pressing assembly in the clamping mechanism moves downward, and the clamping groove of the clamping pad is clamped at the upper end of the cable tube body. The cable tube body is clamped and fixed by the pressing assembly and the lower clamping seat to prevent shaking and sliding when the cable tube body is expanded.

[0020] 3. The motor shaft of the servo motor drives the gear to rotate, so that the rotary transmission mechanism drives the flaring punch to rotate, and the flaring punch drives the cleaning mechanism to rotate, and the air pump is started at the same time; when the cleaning mechanism is inserted into the inner cavity of the end to be flared of the cable tube body, the brush cleaning mechanism and the air blowing cleaning mechanism cooperate to clean the impurities on the inner wall of the cable tube body well, and the cleaning effect is good, which effectively prevents the impurities from affecting the quality of the cable tube after flaring and cleans the inner wall of the end to be flared of the cable tube body.

[0021] 4. After cleaning the impurities on the inner wall of the cable tube body, insert the flaring punch into the end of the heated cable tube body to be flared, thereby completing the flaring operation of the cable tube body. Since the flaring punch is always in a rotating state, it can effectively prevent the flaring punch from sticking to the inner wall of the cable tube body, thereby ensuring the quality of the flaring process of the cable tube body.

[0022] 5. After the expansion process of one cable tube body is completed, the heating of the other cable tube body is completed at the same time. At this time, the inner rod of the hydraulic cylinder contracts to move the L-shaped transmission plate backward. The L-shaped transmission plate drives the heating device, rotary transmission mechanism, expansion punch and cleaning mechanism to move backward for reset. When the L-shaped transmission plate drives the extrusion sleeve to move backward, the pushing assembly and the pressing assembly are reset, waiting for the next clamping operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural stereogram of the expansion equipment for producing MPP cable tubes according to the present invention;

[0024] Figure 2This is a side sectional view of the structure of the expansion equipment for producing MPP cable tubes according to the present invention;

[0025] Figure 3 This is an exploded view of the L-shaped support seat and clamping mechanism structure of the present invention;

[0026] Figure 4 A side sectional view of the support platform and the forward and backward moving mechanism structure of the present invention;

[0027] Figure 5 This is a structural perspective diagram of the forward and backward moving mechanism and the rotating transmission mechanism of the present invention;

[0028] Figure 6 A cross-sectional view of the L-shaped transmission plate, rotary transmission mechanism, flaring punch, and cleaning mechanism of the present invention;

[0029] Figure 7 This is a cross-sectional view of the cleaning mechanism structure of the present invention;

[0030] Figure 8 This is an exploded view of the rotary transmission mechanism, flaring punch and cleaning mechanism structure of the present invention.

[0031] In the figure: 1. Transmission base; 11. Transmission chain plate; 12. Lower clamping seat; 13. Cable tube body; 14. Reinforcement plate; 2. Support platform; 21. Convex groove; 22. L-shaped transmission plate; 23. Convex block; 24. Hydraulic cylinder; 25. Heating equipment; 3. U-shaped frame; 31. Rotating cylinder; 32. External gear ring; 33. Gear; 34. Limiting ring plate; 35. Docking rod; 4. Expanding punch; 41. Connecting ring seat; 42. Docking hole; 43. Ring seat; 44. Ring cavity; 45. Injection head; 5. Supporting horizontal plate; 51. Circular block; 52. Hemispherical fixing block; 53. Annular sealing cover; 54. Air pump; 55. Hose; 56. T-joint; 57. Connecting air pipe; 6. Positioning frame; 61. Hemispherical rotating block; 62. Sliding rod; 63. Return spring; 64. Brush cylinder; 7. L-shaped supporting seat; 71. Rectangular cylinder; 72. Rectangular rod; 73. Round rod; 74. Buffer spring; 75. Extrusion sleeve; 8. Pressing movable arm; 81. Upper clamping seat; 82. Clamping pad; 83. Polished rod; 84. Pushing spring. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1 to 8The present invention provides a technical solution: a flaring device based on the production of MPP cable pipes, comprising a transmission base 1, a transmission chain plate 11 is rotatably installed on the inner side of the transmission base 1, and a plurality of groups of lower clamping seats 12 are fixedly installed at equal intervals on the transmission chain plate 11, and the number of each group of lower clamping seats 12 is two, and the two lower clamping seats 12 of each group are symmetrically distributed front and back, and the upper ends of the two lower clamping seats 12 of each group are placed across a cable pipe body 13, and a reinforcing plate 14 is fixedly installed on the upper end of a side plate of the transmission base 1, and inclined surfaces are opened at both ends of the reinforcing plate 14, and a support platform 2 is fixedly installed on the outer side surface of the transmission base 1, and the support platform 2 and the reinforcing plate 14 are jointly installed on the outer side surface and top of a side plate, and a forward and backward moving mechanism is installed on the upper end of the support platform 2, and a heating device 25 and a rotating transmission mechanism are respectively installed on the forward and backward moving mechanism, and an flaring punch 4 is installed on the end of the rotating transmission mechanism close to the transmission chain plate 11, and a cleaning mechanism for cleaning the inner wall of one end of the cable pipe body 13 is installed on the end of the flaring punch 4 close to the transmission chain plate 11

[0034] An L-shaped positioning baffle is fixedly installed on the outer side of the transmission base 1, and one end of the cable tube body 13 newly placed on the two lower clamping seats 12 is positioned by the L-shaped positioning baffle, so that the cable tube body 13 can be accurately loaded;

[0035] When loading the cable tube body 13 , loading is performed from one end of the transmission base 1 , unloading is performed at the other end of the transmission base 1 , and loading is performed at the end close to the heating device 25 .

[0036] The transmission chain plate 11 drives multiple groups of lower clamping seats 12 to rotate cyclically, and the transmission chain plate 11 drives multiple groups of lower clamping seats 12 to move intermittently. Every time the transmission chain plate 11 stops, there will always be a group of lower clamping seats 12 aligned with the flaring punch 4 and the cleaning mechanism;

[0037] The conveying chain plate 11 is driven by the output shaft of the stepper motor. Each time the stepper motor is started, the conveying chain plate 11 moves forward a certain distance, thereby driving a group of lower clamping seats 12 to move a certain distance, and the cable tube body 13 is driven to move by the lower clamping seats 12. This reciprocating process drives the cable tube body 13 from one end of the transmission base 1 to the other end. During this process, the cable tube body 13 will first be heated by the heating device 25, then cleaned by the cleaning mechanism and expanded by the expanding punch 4, and finally unloaded.

[0038] See also Figure 1 、 Figure 2 and Figure 4The forward and backward moving mechanism includes an L-shaped transmission plate 22 mounted on the upper end of the support platform 2 for sliding forward and backward. A hydraulic cylinder 24 is fixedly mounted on one side of the L-shaped transmission plate 22. The hydraulic cylinder 24 is fixedly mounted on the upper end of the support platform 2. A convex groove 21 is provided on the upper end of the support platform 2. A convex block 23 is fixedly mounted on the lower end of the L-shaped transmission plate 22. The convex block 23 is connected to the convex groove 21 for sliding forward and backward. A heating device 25 is fixedly mounted on one side of the L-shaped transmission plate 22 close to the conveying chain plate 11.

[0039] The number of hydraulic cylinders 24 can be selected as needed. When the number of hydraulic cylinders 24 is 2 or more, the extension and contraction of the multiple hydraulic cylinders 24 are controlled by an electro-hydraulic closed-loop control system, which includes a servo valve, a cross-coupling control, and a displacement sensor.

[0040] The positions of the two hydraulic cylinders 24 are monitored in real time through displacement sensors. After comparing the signals, the controller outputs an electrical signal to drive the servo valve, dynamically adjusts the servo valve opening, and adjusts the flow direction and size to compensate for the error. Cross-coupling control: the synchronization error of the two hydraulic cylinders 24 is bidirectionally coupled, and the motion instructions of the two are dynamically adjusted to achieve synchronous telescopic operation of the two hydraulic cylinders.

[0041] The inner rod of the hydraulic cylinder 24 is extended and retracted to drive the L-shaped transmission plate 22 to move forward and backward along the upper end of the support platform 2. The L-shaped transmission plate 22 drives the convex block 23 to slide forward and backward along the convex groove 21, so that the L-shaped transmission plate 22 can move forward and backward stably.

[0042] When the L-shaped transmission plate 22 moves forward and approaches the conveying chain plate 11, the L-shaped transmission plate 22 drives the heating device 25, the cleaning mechanism and the expanding punch 4 to move forward, so that the heating device 25 heats the end of the cable tube body 13 to be expanded, and at the same time the cleaning mechanism cleans the heated end of the cable tube body 13 to be expanded, and the expanding punch 4 expands the heated end of the cable tube body 13 to be expanded.

[0043] See also Figure 5 、 Figure 6 and Figure 8, a rotating circular hole is penetrated through the side surface of the L-shaped transmission plate 22. The rotating transmission mechanism includes a U-shaped frame 3 fixedly installed on the side surface of the L-shaped transmission plate 22. The U-shaped frame 3 is distributed on the inner side wall of the L-shaped transmission plate 22. A rotating cylinder 31 is rotatably installed in the rotating circular hole. Both ends of the rotating cylinder 31 penetrate through both ends of the rotating circular hole respectively. One end of the rotating cylinder 31 extends to the inside of the U-shaped frame 3. An external gear ring 32 is fixedly sleeved on the end of the rotating cylinder 31 inside the U-shaped frame 3. A gear 33 is meshed with the side surface of the external gear ring 32. The gear 33 is driven by the motor shaft of a servo motor fixedly installed on the outside of the U-shaped frame 3. The motor shaft is rotatably connected with the U-shaped frame 3. The motor shaft and the gear 33 are fixedly sleeved or fixedly connected through a flange or the like. A limiting ring plate 34 is fixedly sleeved on the end of the rotating cylinder close to the conveyor chain plate 11.

[0044] The rotating cylinder 31 is rotatably connected with the rotating circular hole through a bearing. The external gear ring 32 and the limiting ring plate 34 are respectively in rotational contact with the two side walls of the L-shaped transmission plate 22. Through the cooperation of the provided external gear ring 32 and the limiting ring plate 34, the rotating cylinder 31 can rotate stably along the rotating circular hole.

[0045] The motor shaft of the servo motor drives the gear 33 to rotate. The gear 33 drives the external gear ring 32 to rotate. The external gear ring 32 drives the rotating cylinder 31 to rotate along the rotating circular hole. The rotating cylinder 31 drives the limiting ring plate 34 to rotate.

[0046] A plurality of docking insertion rods 35 are fixedly connected in an annular array at the end of the rotating cylinder 31 close to the flaring punch 4. A connecting ring seat 41 is fixedly sleeved on the outside of the end of the flaring punch 4 close to the rotating cylinder 31. A plurality of docking holes 42 are opened in an annular array at the end of the flaring punch 4 close to the rotating cylinder 31. The number of the docking holes 42 matches the number of the docking insertion rods 35. The docking insertion rods 35 are inserted into the docking holes 42. The inner cavity of the rotating cylinder 31 is communicated with the inner cavity of the flaring punch 4. A fixed connection is provided between the connecting ring seat 41 and the limiting ring plate 34. The fixed connection mode between the connecting ring seat 41 and the limiting ring plate 34 is a detachable connection, such as bolt connection, clamping connection and other structures, which can stably lock between the connecting ring seat 41 and the limiting ring plate 34, make the connecting ring seat 41 and the limiting ring plate 34 relatively fixed, and only need to maintain stable synchronous rotation.

[0047] The limiting ring plate 34 rotates to drive the connecting ring seat 41 to rotate. The connecting ring seat 41 drives the flaring punch 4 to rotate.

[0048] The flaring punch 4 rotates while moving forward. By inserting the flaring punch 4 into the to-be-flared end of the cable pipe body 13 after heating, the flaring operation of the cable pipe body 13 is realized.

[0049] Since the expanding punch 4 is always in a rotating state, it can effectively prevent the expanding punch 4 and the inner side wall of the cable tube body 13 from being adhered to each other, thereby ensuring the quality of the expanding process of the cable tube body 13.

[0050] See also Figures 4 to 8 The cleaning mechanism includes a supporting transverse plate 5 arranged in the inner cavity of the expanding punch 4, one end of the supporting transverse plate 5 passes through one end of the inner cavity of the expanding punch 4 and the inner cavity of the rotating cylinder 31 in sequence and is fixedly connected to the inner side wall of the U-shaped frame 3, and the other end of the supporting transverse plate 5 is fixedly connected to a circular block 51. The end of the expanding punch 4 close to the conveying chain plate 11 is fixedly installed with an air blowing cleaning mechanism, which is sleeved on the outer side of the circular block 51, and a brush cleaning mechanism that can shake back and forth is installed on the side of the air blowing cleaning mechanism away from the expanding punch 4.

[0051] The air blowing cleaning mechanism includes an annular seat 43 fixedly mounted on one end of the flaring punch 4 close to the conveying chain plate 11, an annular cavity 44 is formed on the inner side of the annular seat 43, and a plurality of nozzles 45 are fixedly mounted in an annular array on the side of the annular seat 43 away from the flaring punch 4, an annular sealing cover 53 is fixedly mounted on the outer side of the circular block 51, the annular sealing cover 53 is clamped with the inner side of the annular seat 43, and the inner side of the annular seat 43 can rotate along the annular sealing cover 53, the cross section of the annular sealing cover 53 is L-shaped, and the annular sealing cover 53 and the opening of the annular cavity 44 are sealed. The annular sealing cover 53 and the annular seat 43 are provided to make the annular cavity 44 a sealed cavity, and the gas can only be ejected along the nozzles 45, and the nozzles 45 are tilted outwardly.

[0052] A connecting air pipe 57 is symmetrically fixedly installed on the upper part of the annular sealing cover 53, and installation grooves are symmetrically opened on both sides of the supporting cross plate 5. The two connecting air pipes 57 are respectively installed in the two installation grooves. The two connecting air pipes 57 both pass through the U-shaped frame 3 and extend to the outside. The two connecting air pipes 57 are connected to a three-way joint 56 at one end away from the annular sealing cover 53. One port of the three-way joint 56 is connected to one end of the hose 55, and the other end of the hose 55 is connected to the air outlet end of the air pump 54. The air pump 54 can be installed on the support platform 2 or in other positions. The selection can be made according to the actual situation, as long as it is reasonable.

[0053] Gas is introduced into the hose 55 through the air pump 54. The gas flows along the hose 55 through the three-way connector 56 and enters the two connecting air pipes 57. Then, the gas flows along the two connecting air pipes 57 into the annular cavity 44 and is finally ejected through the nozzle 45.

[0054] At this time, if the air jet head 45 is in the inner cavity of the cable tube body 13 , the gas ejected from the air jet head 45 can clean the impurities attached to the inner wall of the cable tube body 13 .

[0055] When the flaring punch 4 rotates, the annular seat 43 at its end is driven to rotate synchronously, and the annular seat 43 rotates along the annular sealing cover 53. At the same time, the annular seat 43 drives the nozzle head 45 thereon to rotate synchronously, so that the nozzle head 45 can rotate along the inner wall of the cable tube body 13, thereby better and more comprehensively cleaning impurities on the inner wall of the cable tube body 13.

[0056] The brush cleaning mechanism includes a positioning frame 6 arranged on the side of the annular seat 43 away from the flaring punch 4, and the positioning frame 6 is symmetrically fixedly connected to a hemispherical rotating block 61 on one side close to the circular block 51, and the circular block 51 is symmetrically fixedly connected to a hemispherical fixed block 52 on one side close to the positioning frame 6. The side of the positioning frame 6 is annularly arrayed and penetrated by a plurality of sliding rods 62. One end of the sliding rod 62 passes through the positioning frame 6 and is fixedly connected to the annular seat 43, and the other end of the sliding rod 62 is sleeved with a return spring 63. The end of the sliding rod 62 away from the annular seat 43 is fixedly sleeved with an anti-slip ring, and the two ends of the return spring 63 respectively abut against the positioning frame 6 and the anti-slip ring. The return spring 63 applies elastic force to the positioning frame 6, and the positioning frame 6 is slidably connected to the slide rod 62. The side of the positioning frame 6 away from the circular block 51 is fixedly connected with a brush cylinder 64. The brush cylinder 64 is an annular cylinder with a plurality of soft brush rods arranged in an annular array on the outside.

[0057] The annular seat 43 rotates to drive the plurality of slide bars 62 to rotate, the slide bars 62 drive the positioning frame 6 to rotate, the positioning frame 6 drives the hemispherical rotating block 61 and the brush cylinder 64 to rotate, and the brush cylinder 64 rotates to clean impurities on the inner wall of the cable tube body 13;

[0058] When the hemispherical rotating block 61 rotates, the hemispherical rotating block 61 approaches the hemispherical fixed block 52. After the hemispherical rotating block 61 contacts the hemispherical fixed block 52, the hemispherical rotating block 61 continues to rotate. At this time, the hemispherical fixed block 52 pushes the hemispherical rotating block 61 to move away from the circular block 51 until one end of the hemispherical fixed block 52 contacts one end of the hemispherical rotating block 61. At this time, the distance between the hemispherical rotating block 61 and the circular block 51 is the largest.

[0059] The hemispherical rotating block 61 drives the positioning frame 6 to move away from the circular block 51, and the positioning frame 6 drives the brush cylinder 64 to move away from the circular block 51. At this time, the positioning frame 6 slides along the slide rod 62, and the positioning frame 6 squeezes the return spring 63.

[0060] When the hemispherical rotating block 61 is separated from the hemispherical fixed block 52, the positioning frame 6 moves closer to the circular block 51 under the action of the elastic force of the return spring 63, and the positioning frame 6 drives the hemispherical rotating block 61 and the brush cylinder 64 to move closer to the circular block 51;

[0061] By moving the hemispherical rotating block 61 close to the hemispherical fixed block 52 and then away from the hemispherical fixed block 52, and so on, the positioning frame 6 drives the brush cylinder 64 to move close to the circular block 51 and then away from the circular block 51, so that the brush cylinder 64 can shake back and forth during the rotation process, so that the brush cylinder 64 can effectively clean the impurities on the inner wall of the cable tube body 13.

[0062] By cooperating with the air blowing cleaning mechanism and the brush cleaning mechanism that can vibrate back and forth, impurities on the inner wall of the cable tube body 13 can be cleaned well with good cleaning effect, effectively preventing the impurities from affecting the quality of the cable tube after expansion.

[0063] See also Figures 1 to 3 An L-shaped support seat 7 is fixedly installed on the upper end of the support platform 2. The upper end of the L-shaped support seat 7 extends to just above the flaring punch 4. A clamping mechanism for locking the cable tube body 13 is installed on the inner upper end of the L-shaped support seat 7.

[0064] The air pump 54 can be installed on the upper end of the L-shaped support base 7.

[0065] The clamping mechanism includes a pushing assembly fixedly mounted on the inner upper end of the L-shaped support seat 7, and a pressing assembly is mounted on the end of the pushing assembly away from the L-shaped transmission plate 22;

[0066] The pushing assembly includes a rectangular tube 71 fixedly mounted on the inner upper end of the L-shaped support seat 7, and a rectangular rod 72 is movably inserted into the inner cavity of the rectangular tube 71. The end of the rectangular rod 72 close to the L-shaped transmission plate 22 is fixedly connected to a round rod 73, and a buffer spring 74 and an extrusion sleeve 75 are sequentially sleeved on the round rod 73. The two ends of the buffer spring 74 are respectively abutted against the rectangular rod 72 and the extrusion sleeve 75, and the extrusion sleeve 75 is slidingly connected to the round rod 73. The lower end of the extrusion sleeve 75 is fixedly connected to the upper end of the L-shaped transmission plate 22, and the end of the rectangular rod 72 away from the L-shaped transmission plate 22 is rotatably installed with a downward pressing arm 8 through a hinge, and the end of the downward pressing arm 8 away from the rectangular rod 72 is connected to the downward pressing assembly.

[0067] When the L-shaped transmission plate 22 moves forward and approaches the transmission chain plate 11, the L-shaped transmission plate 22 drives the extrusion sleeve 75 to move synchronously, and the extrusion sleeve 75 pushes the buffer spring 74. The extrusion sleeve 75 compresses the buffer spring 74, and the rectangular rod 72 is pushed to slide forward along the rectangular tube 71 under the action of the elastic force of the buffer spring 74. The rectangular rod 72 pushes the pressing movable arm 8 to rotate, and the lower end of the pressing movable arm 8 moves downward. The pressing assembly is driven downward by the pressing movable arm 8 until the pressing assembly is stuck in the upper end of the cable tube body 13, and the cable tube body 13 is clamped and fixed by the cooperation of the pressing assembly and the lower clamping seat 12;

[0068] At this time, the L-shaped transmission plate 22 drives the extrusion sleeve 75 to continue to move forward. At this time, the pressing assembly cannot continue to move downward, and the pressing movable arm 8 cannot move downward. At the same time, the rectangular rod 72 and the round rod 73 cannot move forward. At this time, the extrusion sleeve 75 slides along the round rod 73, and the extrusion sleeve 75 squeezes the buffer spring 74. Under the action of the elastic force of the buffer spring 74, a thrust is applied to the rectangular rod 72, so that the rectangular rod 72 maintains a tendency to move forward, and at the same time, the pressing movable arm 8 maintains a tendency to move downward, so that the pressing assembly is firmly stuck on the upper end of the cable tube body 13.

[0069] The pressing assembly includes an upper clamping seat 81 connected to the lower end of the pressing movable arm 8 by a hinge, and a clamping pad 82 is fixedly installed at the lower end of the upper clamping seat 81, and a clamping groove is provided at the lower end of the clamping pad 82. The clamping groove of the clamping pad 82 is clamped at the upper end of the cable tube body 13, and the upper end of the upper clamping seat 81 is symmetrically fixedly connected to a light rod 83. The upper end of the light rod 83 upwardly penetrates the upper end of the L-shaped support seat 7 and extends to the outside. The upper end of the light rod 83 is movable from top to bottom and is sleeved with a positioning ring and an upward push spring 84. The positioning ring is fixedly connected to the upper end of the light rod 83, and the two ends of the upward push spring 84 respectively abut against the upper end and the positioning ring of the L-shaped support seat 7. The upward push spring 84 applies an upward thrust to the positioning ring, and the light rod 83 is slidably connected to the L-shaped support seat 7.

[0070] The clamping pad 82 is an anti-slip pad with a certain elasticity, thereby protecting the cable tube body 13 and preventing the cable tube body 13 from being damaged due to excessive clamping force, while preventing slipping between the clamping pad 82 and the cable tube body 13.

[0071] When the lower end of the pressing movable arm 8 moves downward, the pressing movable arm 8 pushes the upper clamping seat 81 to move downward, and the upper clamping seat 81 drives the clamping groove of the clamping pad 82 to be clamped in the upper end of the cable tube body 13. At the same time, the upper clamping seat 81 drives the optical rod 83 to slide downward along the upper end of the L-shaped support seat 7, and the optical rod 83 drives the positioning ring to move downward. At this time, the positioning ring squeezes the push-up spring 84.

[0072] When the L-shaped transmission plate 22 drives the extrusion sleeve 75 to move backward, the extrusion sleeve 75 slides backward along the round rod 73 until the L-shaped transmission plate 22 and the extrusion sleeve 75 are reset;

[0073] At this time, under the action of the elastic force of the push-up spring 84, the positioning ring moves upward, and the positioning ring drives the round rod 73 to move upward, and the round rod 73 drives the upper clamping seat 81 and the clamping pad 82 to move upward. At the same time, when the lower end of the downward movable arm 8 moves upward, the upper clamping seat 81 will be driven to move upward synchronously, so that the clamping pad 82 releases the clamping fixation on the cable tube body 13, thereby resetting the upper clamping seat 81 and the clamping pad 82.

[0074] Working principle: When working, the cable tube body 13 is placed across the upper end of the lower clamping seat 12 at one end of the transmission base 1, and the cable tube body 13 is transmitted through the transmission chain plate 11;

[0075] When the end of the cable tube body 13 to be expanded is aligned with the heating port of the heating device 25, the inner rod of the hydraulic cylinder 24 extends to drive the L-shaped transmission plate 22 to move forward, and the L-shaped transmission plate 22 drives the heating device 25 to be sleeved on the end of the cable tube body 13 to be expanded, thereby heating the end of the cable tube body 13 to be expanded. After the heating is completed, the inner rod of the hydraulic cylinder 24 is retracted, and the L-shaped transmission plate 22 drives the heating device 25 to return to its original position.

[0076] After the end of the cable tube body 13 to be expanded is heated, it is transferred to the bottom of the pressing assembly via the conveying chain plate 11 so that the end of the cable tube body 13 to be expanded is aligned with the expanding punch 4 .

[0077] Then, the inner rod of the hydraulic cylinder 24 extends to drive the L-shaped transmission plate 22 to move forward, and the L-shaped transmission plate 22 drives the heating device 25, the rotary transmission mechanism, the flaring punch 4 and the cleaning mechanism to move forward. At this time, the cleaning mechanism cleans the inner side wall of the end to be flared of the cable tube body 13 that has just been heated. Then, the flaring punch 4 performs the flaring operation on the end to be flared of the cable tube body 13 that has been cleaned.

[0078] At the same time, the heating device 25 heats the end of the next cable tube body 13 to be expanded. When heating one cable tube body 13, the expansion operation can be performed on the other cable tube body 13 at the same time, which greatly improves the work efficiency.

[0079] The specific operation is as follows: when the L-shaped transmission plate 22 moves forward, the L-shaped transmission plate 22 drives the extrusion sleeve 75 to move synchronously, and the extrusion sleeve 75 pushes the buffer spring 74. Under the action of the elastic force of the buffer spring 74, the rectangular rod 72 is pushed to slide forward along the rectangular tube 71. The rectangular rod 72 pushes the lower end of the pressing movable arm 8 to move downward. The pressing movable arm 8 pushes the upper clamping seat 81 to move downward. The upper clamping seat 81 drives the clamping groove of the clamping pad 82 to be clamped in the upper end of the cable tube body 13. The cable tube body 13 is clamped and fixed by the cooperation of the pressing assembly and the lower clamping seat 12 to prevent shaking and sliding when the cable tube body 13 is expanded;

[0080] Moreover, the movement of the pressing component and the expanding punch 4 can be synchronized, and improper timing control will not occur, that is, the expanding punch 4 expands the opening first, but has not yet clamped the cable tube body 13. At this time, the cable tube body 13 will move, affecting the accuracy of the expansion of the cable tube body 13.

[0081] At this time, the L-shaped transmission plate 22 drives the extrusion sleeve 75 to continue to move forward. At this time, the pressing assembly cannot continue to move downward. At this time, the extrusion sleeve 75 slides along the round rod 73, and the extrusion sleeve 75 squeezes the buffer spring 74. Under the action of the elastic force of the buffer spring 74, a thrust is applied to the rectangular rod 72, so that the rectangular rod 72 maintains a tendency to move forward, and at the same time, the pressing movable arm 8 maintains a tendency to move downward, so that the pressing assembly is firmly stuck on the upper end of the cable tube body 13.

[0082] When the L-shaped transmission plate 22 moves forward, the motor shaft of the servo motor drives the gear 33 to rotate, the gear 33 drives the outer gear ring 32 to rotate, the outer gear ring 32 drives the limiting ring plate 34 to rotate through the rotating cylinder 31, the limiting ring plate 34 drives the expanding punch 4 to rotate through the connecting ring seat 41, the expanding punch 4 drives the cleaning mechanism to rotate, and at the same time the air pump 54 is started;

[0083] When the cleaning mechanism is inserted into the inner cavity of the end to be expanded of the cable tube body 13, the brush cleaning mechanism and the air blowing cleaning mechanism cooperate to clean the impurities on the inner wall of the cable tube body 13 well, and the cleaning effect is good, effectively preventing the impurities from affecting the quality of the cable tube after expansion, and cleaning the inner wall of the end to be expanded of the cable tube body 13.

[0084] The air blowing cleaning mechanism and the brush cleaning mechanism both rotate synchronously with the flaring punch 4, and the annular seat 43 in the air blowing cleaning mechanism drives the air jet head 45 thereon to rotate, so that the air jet head 45 can rotate along the inner wall of the cable tube body 13; the brush barrel 64 in the brush cleaning mechanism rotates along the inner wall of the cable tube body 13, and the brush barrel 64 can shake back and forth during the rotation process, so that the impurities on the inner wall of the cable tube body 13 can be better and more comprehensively cleaned.

[0085] After cleaning the impurities on the inner wall of the cable tube body 13, the expanding punch 4 is inserted into the end of the heated cable tube body 13 to be expanded, thereby completing the expansion operation of the cable tube body 13;

[0086] Since the expanding punch 4 is always in a rotating state, it can effectively prevent the expanding punch 4 and the inner side wall of the cable tube body 13 from being adhered to each other, thereby ensuring the quality of the expanding process of the cable tube body 13.

[0087] After the expansion process of one cable tube body 13 is completed, the heating of the other cable tube body 13 is completed at the same time. At this time, the inner rod of the hydraulic cylinder 24 contracts to move the L-shaped transmission plate 22 backward. The L-shaped transmission plate 22 drives the heating device 25, the rotary transmission mechanism, the expansion punch 4 and the cleaning mechanism to move backward and reset.

[0088] When the L-shaped transmission plate 22 drives the extrusion sleeve 75 to move backward, the extrusion sleeve 75 slides backward along the round rod 73 until the L-shaped transmission plate 22 and the extrusion sleeve 75 are reset;

[0089] At this time, under the action of the elastic force of the push-up spring 84, the positioning ring moves upward, the positioning ring drives the round rod 73 to move upward, and the round rod 73 drives the upper clamping seat 81 and the clamping pad 82 to move upward. At the same time, when the lower end of the downward-pressing movable arm 8 moves upward, the upper clamping seat 81 will be driven to move upward synchronously, so that the clamping pad 82 releases the clamping fixation on the cable tube body 13, thereby resetting the upper clamping seat 81 and the clamping pad 82 and waiting for the next clamping operation.

[0090] At this time, the conveying chain plate 11 is operated to move the expanded cable tube body 13 from under the pressing assembly, and the new heated cable tube body 13 is transported to the bottom of the pressing assembly. At the same time, the unheated cable tube body 13 is transported to align with the heating port of the heating device 25, and then the above operation is repeated, so that the cable tube body 13 can be continuously processed. When the cable tube body 13 is transported to the other end of the transmission base 1, the expanded cable tube body 13 can be unloaded.

[0091] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A flaring device based on the production of MPP cable tubes, comprising a transmission base (1), wherein a transmission chain plate (11) is rotatably mounted on the inner side of the transmission base (1), characterized in that: A plurality of lower clamping seats (12) are fixedly installed at equal intervals on the conveyor chain plate (11). The number of each group of lower clamping seats (12) is two. The upper ends of the two lower clamping seats (12) in each group are placed across the cable pipe body (13). The upper end of a side plate of the transmission base (1) is fixedly installed with a reinforcing plate (14). The two ends of the reinforcing plate (14) are provided with inclined surfaces. The outer side surface of the transmission base (1) is fixedly installed with a support platform (2). A front and rear moving mechanism is installed on the upper end of the support platform (2). A heating device (25) and a rotary transmission mechanism are respectively installed on the front and rear moving mechanism. One end of the rotary transmission mechanism close to the conveyor chain plate (11) is installed with a flaring punch (4). One end of the flaring punch (4) close to the conveyor chain plate (11) is installed with a cleaning mechanism for cleaning the inner wall of one end of the cable pipe body (13); The cleaning mechanism includes a support cross plate (5) arranged in the inner cavity of the flaring punch (4). One end of the support cross plate (5) sequentially passes through one end of the inner cavity of the flaring punch (4) and the inner cavity of the rotary cylinder (31) and is fixedly connected with the inner side wall of the C-shaped frame (3). The other end of the support cross plate (5) is fixedly connected with a circular block (51). One end of the flaring punch (4) close to the conveyor chain plate (11) is fixedly installed with a blowing cleaning mechanism. The blowing cleaning mechanism is sleeved on the outer side of the circular block (51). One side of the blowing cleaning mechanism far from the flaring punch (4) is installed with a brush cleaning mechanism that can shake back and forth; The blowing cleaning mechanism includes an annular seat (43) fixedly installed at one end of the flaring punch (4) close to the conveyor chain plate (11). An annular cavity (44) is arranged on the inner side of the annular seat (43). A plurality of air jet nozzles (45) are fixedly installed in an annular array on one side of the annular seat (43) far from the flaring punch (4). An annular sealing cover (53) is fixedly installed on the outer side of the circular block (51). The annular sealing cover (53) is clamped with the inner side of the annular seat (43). The cross section of the annular sealing cover (53) is distributed in an L shape, and is sealed through the opening of the annular sealing cover (53) and the annular cavity (44); Two connecting air pipes (57) are symmetrically and fixedly installed on the annular sealing cover (53). Installation grooves are symmetrically arranged on both sides of the support cross plate (5). The two connecting air pipes (57) are respectively installed in the two installation grooves. The two connecting air pipes (57) both penetrate through the C-shaped frame (3) and extend to the outside. The two ends of the two connecting air pipes (57) far from the annular sealing cover (53) are jointly connected with a three-way joint (56). One port of the three-way joint (56) is connected with one end of a hose (55). The other end of the hose (55) is connected with the air outlet end of an air pump (54); The brush cleaning mechanism includes a positioning frame (6) provided on the side of the annular seat (43) away from the flaring punch (4). On the side of the positioning frame (6) close to the circular block (51), hemispherical rotating blocks (61) are symmetrically and fixedly connected. On the side of the circular block (51) close to the positioning frame (6), hemispherical fixed blocks (52) are symmetrically and fixedly connected. A plurality of sliding rods (62) are inserted through the side surface of the positioning frame (6) in an annular array. One end of the sliding rod (62) passes through the positioning frame (6) and is fixedly connected to the annular seat (43). The other end of the sliding rod (62) is sleeved with a return spring (63). An anti - detachment ring is fixedly sleeved on the end of the sliding rod (62) away from the annular seat (43). The two ends of the return spring (63) are respectively abutted against the positioning frame (6) and the anti - detachment ring. The positioning frame (6) is slidably connected with the sliding rod (62). On the side of the positioning frame (6) away from the circular block (51), a brush barrel (64) is fixedly connected.

2. The expansion device for producing MPP cable tubes according to claim 1, characterized in that: The forward - and - backward moving mechanism includes an L - shaped transmission plate (22) slidably installed in the front - and - back direction on the upper end of the support table (2). On one side of the L - shaped transmission plate (22), a hydraulic cylinder (24) is fixedly installed, and the hydraulic cylinder (24) is fixedly installed on the upper end of the support table (2). A convex groove (21) is opened on the upper end of the support table (2). A convex block (23) is fixedly installed at the lower end of the L - shaped transmission plate (22). The convex block (23) is slidably connected with the convex groove (21) in the front - and - back direction. The heating device (25) is fixedly installed on the side of the L - shaped transmission plate (22) close to the conveyor chain plate (11).

3. The expansion device for producing MPP cable tubes according to claim 2, characterized in that: A rotating circular hole is penetrated through the side surface of the L - shaped transmission plate (22). The rotating transmission mechanism includes a U - shaped frame (3) fixedly installed on the side surface of the L - shaped transmission plate (22). The U - shaped frames (3) are distributed on the inner side wall of the L - shaped transmission plate (22). A rotating cylinder (31) is rotatably installed in the rotating circular hole. The two ends of the rotating cylinder (31) respectively penetrate through the two ends of the rotating circular hole. One end of the rotating cylinder (31) extends to the inside of the U - shaped frame (3). An external gear ring (32) is fixedly sleeved on the end of the rotating cylinder (31) inside the U - shaped frame (3). A gear (33) is meshed with the side surface of the external gear ring (32). The gear (33) is driven by the motor shaft of a servo motor fixedly installed on the outside of the U - shaped frame (3). A limiting ring plate (34) is fixedly sleeved on the end of the rotating cylinder (31) close to the conveyor chain plate (11).

4. The expansion device for producing MPP cable tubes according to claim 3, characterized in that: A plurality of docking insertion rods (35) are fixedly connected in an annular array at the end of the rotating cylinder (31) close to the flaring punch (4). A connecting ring seat (41) is fixedly sleeved on the outside of the end of the flaring punch (4) close to the rotating cylinder (31). A plurality of docking holes (42) are opened in an annular array at the end of the flaring punch (4) close to the rotating cylinder (31). The number of the docking holes (42) matches the number of the docking insertion rods (35). The docking insertion rods (35) are inserted into the docking holes (42). A fixed connection is made between the connecting ring seat (41) and the limiting ring plate (34).

5. The expansion device for producing MPP cable tubes according to claim 1, characterized in that: An L-shaped support seat (7) is fixedly mounted on the upper end of the support platform (2), the upper end of the L-shaped support seat (7) extends to just above the expansion punch (4), and a clamping mechanism for locking the cable tube body (13) is mounted on the inner upper end of the L-shaped support seat (7).

6. The expansion device for producing MPP cable tubes according to claim 5, characterized in that: The clamping mechanism includes a pushing component fixedly mounted on the inner upper end of the L-shaped support seat (7), and a pressing component is mounted on the end of the pushing component away from the L-shaped transmission plate (22); The pushing assembly includes a rectangular tube (71) fixedly mounted on the inner upper end of the L-shaped support seat (7), a rectangular rod (72) movably inserted into the inner cavity of the rectangular tube (71), and a round rod (73) fixedly connected to one end of the rectangular rod (72) close to the L-shaped transmission plate (22), and a buffer spring (74) and an extrusion sleeve (75) are sequentially sleeved on the round rod (73), and the two ends of the buffer spring (74) are respectively in contact with the rectangular rod (72) and the extrusion sleeve (75), and the extrusion sleeve (75) is slidably connected to the round rod (73), and the lower end of the extrusion sleeve (75) is fixedly connected to the upper end of the L-shaped transmission plate (22), and a downward pressing movable arm (8) is rotatably mounted on the end of the rectangular rod (72) away from the L-shaped transmission plate (22) through a hinge, and the end of the downward pressing movable arm (8) away from the rectangular rod (72) is connected to the downward pressing assembly.

7. The expansion device for producing MPP cable tubes according to claim 6, characterized in that: The pressing assembly includes an upper clamping seat (81) connected to the lower end of the pressing movable arm (8) through a hinge, a clamping pad (82) is fixedly installed at the lower end of the upper clamping seat (81), a clamping groove is opened at the lower end of the clamping pad (82), and the clamping groove of the clamping pad (82) is clamped at the upper end of the cable tube body (13), and the upper end of the upper clamping seat (81) is symmetrically fixedly connected with a light rod (83), the upper end of the light rod (83) upwardly penetrates the upper end of the L-shaped support seat (7) and extends to the outside, the upper end of the light rod (83) is sleeved with a positioning ring and an upward push spring (84) when it moves from top to bottom, the positioning ring is fixedly connected to the upper end of the light rod (83), and the two ends of the upward push spring (84) are respectively in contact with the upper end of the L-shaped support seat (7) and the positioning ring, and the light rod (83) is connected to the L-shaped support seat (7) in an upward and downward sliding manner.

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