Raw material proportioning, mixing and weighing system for producing PVC (polyvinyl chloride) cable

Abstract

The invention discloses a raw material proportioning, mixing and weighing system for producing a PVC cable. The raw material proportioning, mixing and weighing system comprises a control cabinet, a raw material proportioning device, a horizontal stirring device and a weighing and bagging device, the raw material proportioning device comprises a lifting and dumping mechanism and a proportioning and conveying mechanism; the lifting and dumping mechanism is used for transporting and dumping the raw materials into the proportioning and conveying mechanism; the raw materials are quantitatively conveyed into the horizontal stirring device by the proportioning and conveying mechanism, and are stirred and mixed by the horizontal stirring device; and the weighing and bagging device is used for quantitatively filling the raw materials into raw material bags. According to the raw material proportioning, mixing and weighing system, raw materials are conveyed and poured into the corresponding proportioning and conveying mechanisms through the lifting and pouring mechanisms, so that the raw materials do not need to be manually lifted into the proportioning and conveying mechanisms at high positions, the labor intensity is effectively reduced, and the working efficiency is improved; by means of the horizontal stirring device, horizontal stirring of the raw materials can be achieved, layering of the raw materials is avoided, the stirring uniformity of the raw materials is improved, and the production quality of PVC cable products is guaranteed.

Description

Technical Field

[0001] This invention relates to a raw material proportioning, mixing, and weighing system, and more particularly to a raw material proportioning, mixing, and weighing system for the production of PVC cables. Background Technology

[0002] In the production of PVC cables, the precise proportioning and uniform mixing of raw materials are crucial processes that determine the core indicators of the cable, such as insulation performance, mechanical strength, and aging resistance. The standardization of the process and the stability of the equipment directly affect the final product's pass rate and service life. Currently, the raw material proportioning, mixing, and weighing systems used by PVC cable manufacturers, while meeting basic production needs, still have significant technical shortcomings in terms of automation and material mixing uniformity. These shortcomings make it difficult to adapt to the modern manufacturing industry's upgrade requirements for efficient, precise, and low-consumption production. Specific problems are as follows:

[0003] First, the current weighing and equipment system relies heavily on manual handling and loading, which has many drawbacks such as low efficiency, high cost, and insufficient safety. The raw materials required for PVC cable production are bagged granules, with each bag typically weighing 25-50kg. Manual handling is not only labor-intensive and prone to delays due to worker fatigue, affecting the production rhythm, but also carries risks such as material spillage and damage from impacts, resulting in a raw material loss rate of over 5%.

[0004] Secondly, the vertical mixing devices commonly used in existing systems have poor mixing performance, making it difficult to meet the mixing quality requirements of PVC cable raw materials. The physical properties of the components in PVC cable raw materials vary significantly, requiring highly uniform mixing to ensure consistent cable performance. However, existing vertical mixing systems suffer from several inherent defects due to structural design limitations: Firstly, insufficient material circulation at the bottom of the vertical mixing drum, and agitator blade coverage generally below 70%, leads to material accumulation and incomplete unloading at the bottom. This not only wastes raw materials but also affects the quality of subsequent batches due to the deterioration of residual material. Secondly, some vertical mixing equipment, in an effort to control costs, unilaterally increases tank capacity without matching the corresponding mixing structure, reducing mixing uniformity. Furthermore, extending the mixing time to improve uniformity can cause stratification due to differences in component specific gravity, exacerbating the mixing unevenness problem, extending the production cycle, and reducing overall production efficiency. Hourly output can only be maintained at 500-1500 kg, making it unsuitable for large-scale continuous production.

[0005] In summary, existing PVC cable raw material proportioning, mixing, and weighing systems suffer from high reliance on manual handling and poor vertical mixing effects, which have become core bottlenecks restricting production efficiency improvement, product quality stability, and production cost control. With the accelerated transformation of the manufacturing industry towards intelligence and automation, and the market's increasing demands for product quality, developing a raw material proportioning, mixing, and weighing system that can reduce the burden of material handling and improve mixing uniformity has become an urgent technical need to be addressed in the industry. Summary of the Invention

[0006] The purpose of this invention is to provide a raw material proportioning, mixing, and weighing system for the production of PVC cables, which facilitates the addition of raw materials, ensures uniform mixing of each material, effectively improves work efficiency, and guarantees product quality.

[0007] Technical Solution: The raw material proportioning, mixing, and weighing system for producing PVC cables according to the present invention includes a control cabinet, a raw material proportioning device, a horizontal mixing device, and a weighing and bagging device. The raw material proportioning device includes a lifting and tilting mechanism and multiple proportioning conveying mechanisms. The lifting and tilting mechanism is used to load the raw materials to be added and transport and tilt them into the corresponding proportioning conveying mechanisms. The discharge port of each proportioning conveying mechanism is connected to the inlet of the horizontal mixing device, and each proportioning conveying mechanism quantitatively conveys its loaded raw materials into the horizontal mixing device, where the horizontal mixing device mixes the received raw materials. The weighing and bagging device is used to receive the raw materials mixed by the horizontal mixing device and quantitatively fill the mixed raw materials into raw material bags. The lifting and tilting mechanism, each proportioning conveying mechanism, the horizontal mixing device, and the weighing and bagging device are all driven and controlled by the control cabinet.

[0008] Furthermore, the lifting and tilting mechanism includes a carrying bucket, a longitudinal movement drive unit, a lifting drive unit, and a tilting drive unit; the carrying bucket is mounted on the tilting drive unit, the tilting drive unit is mounted on the lifting drive unit, and the lifting drive unit is mounted on the longitudinal movement drive unit. The tilting drive unit tilts the carrying bucket, the lifting drive unit lifts the tilting drive unit, and the longitudinal movement drive unit moves the lifting drive unit longitudinally. The longitudinal movement drive unit, the lifting drive unit, and the tilting drive unit are all driven and controlled by a control cabinet.

[0009] Furthermore, the proportioning conveying mechanism includes a carrying box, a batching drive motor, and a batching conveying auger; the carrying boxes of each proportioning conveying mechanism are arranged longitudinally, and the bottom of the carrying box is set as a V-shaped base plate, with supporting legs vertically installed on the V-shaped base plate; the top of the carrying box is provided with an inlet for receiving raw materials from the carrying hopper; a vibrator is installed on one side plate of the V-shaped base plate, the lower end of the batching conveying auger is fixed to the other side plate of the V-shaped base plate, and the inlet of the batching conveying auger is connected to the lower part of the V-shaped base plate; the batching drive motor is installed at the upper end of the batching conveying auger and drives the batching conveying auger to rotate through a sprocket transmission mechanism; the outlet of the batching conveying auger extends above the inlet of the horizontal mixing device through a discharge conveying pipe; the batching drive motor and the vibration drive motor of the vibrator are both driven and controlled by a control cabinet.

[0010] Furthermore, the horizontal mixing device includes a cylindrical tank, a rotary support mechanism, a mixing mechanism, a feeding mechanism, and a discharging mechanism. Rotary support shafts are installed on the front and rear outer walls of the cylindrical tank, and these shafts intersect perpendicularly with the central axis of the cylindrical tank. Two rotary support shafts are mounted on the rotary support mechanism, which drives their rotation. The mixing mechanism, feeding mechanism, and discharging mechanism are all mounted on the cylindrical tank. The feeding mechanism feeds the raw material to be mixed into the cylindrical tank, the mixing mechanism mixes the raw material, and the discharging mechanism releases the mixed raw material from the cylindrical tank. The rotary support mechanism, mixing mechanism, feeding mechanism, and discharging mechanism are all controlled by a control cabinet.

[0011] Furthermore, the stirring mechanism includes a stirring drive motor, a stirring shaft, and multiple stirring units; each stirring unit includes a stirring rod and two radial rods; the stirring shaft is rotatably mounted inside the cylindrical tank and located on the central axis of the cylindrical tank; one end of the stirring shaft extends out of the cylindrical tank, and a stirring driven sprocket is fixedly mounted on the extended end; the stirring drive motor is fixedly mounted on the side of the cylindrical tank, and a stirring drive sprocket is mounted on the output shaft of the stirring drive motor; the stirring driven sprocket and the stirring drive sprocket are driven by a stirring transmission chain; one end of each of the two radial rods is vertically fixed to the stirring shaft, the stirring rod is fixed to the other end of the two radial rods, and the stirring rod is provided with a beveled surface close to the inner wall of the cylindrical tank; the stirring drive motor is driven and controlled by a control cabinet.

[0012] Furthermore, guide vanes are spaced apart on the stirring rod, with each guide vane in pairs, and the two guide vanes in each pair are arranged in a figure-eight pattern.

[0013] Furthermore, the weighing and bagging device includes a receiving hopper, an auger conveyor mechanism, a bagging mechanism, and a weighing mechanism; the receiving hopper is installed on the third support base plate, the lower inlet of the auger conveyor mechanism extends into the receiving hopper, and the upper outlet of the auger conveyor mechanism is connected to a conveying pipe; the bagging mechanism is suspended on the lower end of the conveying pipe and is used to clamp the bag opening of the raw material bag and release the mixed raw material into the raw material bag; the weighing mechanism is located below the bagging mechanism and is used to weigh the raw material bag; the auger conveyor mechanism, the bagging mechanism, and the weighing mechanism are all driven and controlled by a control cabinet.

[0014] Furthermore, the auger conveying mechanism includes a release button, a conveying auger, a conveying drive motor, a buffer tank, and a support column; the lower feed inlet of the conveying auger extends into the bottom of the receiving hopper; the upper end of the support column is fixed to the middle of the conveying auger, and the lower end is vertically fixed to the third support base plate; the release button is installed on the support column and electrically connected to the control cabinet; the conveying drive motor is fixed to the upper end of the conveying auger and drives the conveying auger to rotate through a sprocket transmission mechanism; the conveying pipe is connected to the upper discharge port of the conveying auger; the buffer tank is connected to the lower end of the conveying pipe; the conveying drive motor is driven and controlled by the control cabinet.

[0015] Furthermore, the bagging mechanism includes a release box, a release drive motor, a release roller, a release push seat, a push spring, a rectangular release channel, and a bag mouth clamping unit. The top of the release box has a release inlet, which is connected to the bottom of the buffer box. The release roller is rotatably and longitudinally installed inside the release box, and its circumferential wall has longitudinally arranged distributing ridges, each with an isosceles triangular cross-section. The shaft of the release roller extends out of the release box, and a release driven gear is installed on the extended end. The release drive motor is fixed to the release box via a motor bracket, and a release drive gear meshing with the release driven gear is installed on the output shaft of the release drive motor. A telescopic limiting groove is provided on the side of the release box, and the release push seat is slidably installed in the telescopic limiting groove. A limit adjustment bolt is vertically installed on the inner end face of the release push seat; the limit adjustment bolt extends through the release box and an adjustment nut is threaded onto the through end; the push spring is installed in the telescopic limit groove and elastically supported on the inner end face of the release push seat; an arc-shaped push surface that matches the circumferential wall of the release roller is provided on the outer end face of the release push seat; a guide slope is provided at the upper edge of the outer end face of the release push seat, and the release inlet is located above the guide slope and the circumferential wall of the release roller; a release connecting pipe is provided at the bottom of the release box, the upper end of the rectangular release channel is connected to the release connecting pipe, and the lower end of the rectangular release channel is open; a bag mouth clamping unit is installed on the lower outer wall of the rectangular release channel for clamping the bag mouth of the raw material bag; the release drive motor is driven and controlled by the control cabinet.

[0016] Furthermore, the bag opening clamping unit includes a strip-shaped fixing seat, a sliding block, a handle, two swing rods, two drive linkages, and two clamping rods; the strip-shaped fixing seat is vertically fixed to the lower front side wall of the rectangular release channel, and a T-shaped groove is vertically provided on the strip-shaped fixing seat; the sliding block is slidably installed in the T-shaped groove, and the handle is vertically fixed to the upper end of the sliding block; the middle parts of the two swing rods are rotatably installed on the front side wall of the rectangular release channel; the front ends of the two clamping rods are respectively vertically... The two clamping rods are fixed to the lower ends of the two swing rods, and the rear ends of the two clamping rods extend longitudinally to the left and right side walls of the rectangular release channel. Anti-slip strips for clamping and cooperating with the clamping rods are longitudinally provided on the left and right side walls. The upper ends of the two drive connecting rods are respectively swing-hinged on the upper ends of the two swing rods, and the lower ends of the two drive connecting rods are swing-hinged on the lower ends of the sliding block. A rebound spring is provided at the lower end of the T-shaped slide groove, and the rebound spring is elastically supported on the lower end surface of the sliding block.

[0017] Compared with existing technologies, the advantages of this invention are as follows: The lifting and tilting mechanism is used to load the raw materials to be added and transport them to the corresponding proportioning conveying mechanism. This eliminates the need for manual lifting to a higher proportioning conveying mechanism; instead, the raw materials can be poured into a lower lifting and tilting mechanism, effectively reducing labor intensity and improving work efficiency. The horizontal stirring device enables horizontal stirring of the raw materials, preventing stratification, improving the uniformity of stirring, and ensuring the production quality of PVC cable products. The weighing and bagging device can quantitatively bag the stirred raw materials, facilitating their transport to the extrusion workshop for cable production. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the front structure of the present invention;

[0019] Figure 2 This is a front view schematic diagram of the raw material proportioning device of the present invention;

[0020] Figure 3 This is a schematic diagram of the lifting and tilting mechanism of the present invention from the left side.

[0021] Figure 4 This is a schematic diagram of the internal structure of the top support column of the present invention;

[0022] Figure 5 This is a schematic diagram of the left side of the proportioning and conveying mechanism of the present invention;

[0023] Figure 6 This is a front view schematic diagram of the horizontal stirring device of the present invention;

[0024] Figure 7 This is a schematic diagram of the horizontal stirring device of the present invention from the left side.

[0025] Figure 8 This is a schematic diagram of the internal structure of the cylindrical tank of the present invention;

[0026] Figure 9 This is a partial structural diagram of the stirring rod of the present invention;

[0027] Figure 10 This is a front view schematic diagram of the weighing and bagging device of the present invention;

[0028] Figure 11 This is a schematic diagram of the internal structure of the bagging mechanism of the present invention;

[0029] Figure 12 This is a schematic diagram of the circuit structure of the present invention. Detailed Implementation

[0030] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments described.

[0031] like Figure 1-12 As shown, the raw material proportioning, mixing, and weighing system for producing PVC cables disclosed in this invention includes: a control cabinet 129, a raw material proportioning device, a horizontal mixing device, and a weighing and bagging device; the raw material proportioning device includes a lifting and tilting mechanism and multiple proportioning conveying mechanisms; the lifting and tilting mechanism is used to load the raw materials to be added and transport and tilt the raw materials to be added into the corresponding proportioning conveying mechanisms; the discharge port of each proportioning conveying mechanism is connected to the inlet of the horizontal mixing device, and each proportioning conveying mechanism quantitatively conveys its loaded raw materials into the horizontal mixing device, whereby the horizontal mixing device mixes the received raw materials; the weighing and bagging device is used to receive the raw materials mixed by the horizontal mixing device and quantitatively fill the mixed raw materials into raw material bags 308; the lifting and tilting mechanism, each proportioning conveying mechanism, the horizontal mixing device, and the weighing and bagging device are all driven and controlled by the control cabinet 129.

[0032] The lifting and tilting mechanism is used to load the raw materials to be added and transport them to the corresponding proportioning conveying mechanism. This eliminates the need for manual lifting to a higher proportioning conveying mechanism; the raw materials can simply be poured into the lower lifting and tilting mechanism, effectively reducing labor intensity and improving work efficiency. The horizontal mixing device enables horizontal mixing of the raw materials, preventing stratification, improving the uniformity of mixing, and ensuring the production quality of PVC cable products. The weighing and bagging device can quantitatively bag the mixed raw materials, facilitating their transport to the extrusion workshop for cable production.

[0033] like Figure 1-3As shown, the lifting and tilting mechanism includes a carrying hopper 114, a longitudinal movement drive unit, a lifting drive unit, and a tilting drive unit. The carrying hopper 114 is mounted on the tilting drive unit, which is mounted on the lifting drive unit, which is mounted on the longitudinal movement drive unit. The tilting drive unit tilts the carrying hopper 114, the lifting drive unit lifts the tilting drive unit, and the longitudinal movement drive unit moves the lifting drive unit longitudinally. All three units are controlled by the control cabinet 129. The tilting drive unit tilts the carrying hopper 114, allowing it to tilt towards the personnel when manually pouring raw materials into it, facilitating pouring. When pouring raw materials into the proportioning conveying mechanism, the carrying hopper 114 is tilted towards the proportioning conveying mechanism.

[0034] like Figure 1-4 As shown, the longitudinal drive unit includes a longitudinal drive motor 123, a longitudinal drive screw 122, a longitudinal support base 117, and a longitudinal strip base 119. The longitudinal strip base 119 is longitudinally fixedly mounted on the first base plate 101. The lower side of the longitudinal support base 117 is longitudinally provided with a snap-fit ​​groove 111, and is snapped onto the longitudinal strip base 119 through the snap-fit ​​groove 111. Roller support grooves 120 are longitudinally provided on both the left and right sides of the longitudinal strip base 119. Each longitudinal support roller 118 is rotatably mounted on the two inner sides of the snap-fit ​​groove 111. Each longitudinal support roller 118 rolls within the corresponding roller support groove 120, ensuring longitudinal stability. The longitudinal drive screw 122 is rotatably mounted longitudinally on the longitudinal strip seat 119 via a rotary mounting bracket 125. A longitudinal drive seat is fixedly installed in the snap-fit ​​groove 111, and the longitudinal drive screw 122 is threadedly screwed onto the longitudinal drive seat. The longitudinal drive motor 123 is fixedly mounted on the first base plate 101 and is used to drive the longitudinal drive screw 122. The longitudinal drive motor 123 is driven and controlled by the control cabinet 129. The longitudinal drive screw 122 drives the longitudinal drive seat and longitudinal support seat 117 longitudinally, causing the carrying hopper 114 to move to the left side of the corresponding raw material proportioning and conveying mechanism for material dumping.

[0035] like Figure 1-4As shown, the lifting drive unit includes two lifting support columns 108, a top support column 110, a lifting drive motor 109, two lifting drive screws 112, and two lifting drive sleeves 121. The lower ends of the two lifting support columns 108 are vertically fixed on the longitudinal support base 117, and lifting drive slotted holes 113 are vertically provided on the left and right side walls of the lifting support columns 108. A lifting drive block is slidably installed inside each of the two lifting support columns 108. The two lifting drive screws 112 are rotatably and vertically installed inside the two lifting support columns 108, and the lifting drive screws 112 are threadedly screwed onto the lifting drive blocks. The two lifting drive sleeves 121 are slidably installed on the two lifting support columns 108, and the inner walls of the two lifting drive sleeves 121 are open. The connecting blocks pass through the corresponding lifting drive slots 113 and are fixed to the corresponding lifting drive blocks, with the two lifting drive sleeves 121 at the same height. The front and rear sides of the carrying bucket 114 are rotatably mounted on the corresponding lifting drive sleeves 121 via a short support shaft. The top support column 110 is longitudinally fixed to the upper ends of the two lifting support columns 108, and a synchronous shaft 131 is rotatably and longitudinally mounted inside the top support column 110. The upper ends of the two lifting drive screws 112 extend into the top support column 110 and rotate synchronously with the synchronous shaft 131 via a bevel gear set. The lifting drive motor 109 is mounted on the end of the top support column 110 and is used to drive the synchronous shaft 131. The lifting drive motor 109 is driven and controlled by the control cabinet 129. The synchronous shaft 131 and the two bevel gear sets enable synchronous driving of the two lifting drive screws 112, thus ensuring the synchronous lifting and lowering movement of the two lifting drive sleeves 121.

[0036] like Figure 1-4 As shown, the tilting drive unit includes a tilting drive motor 115, a tilting drive worm 116, and a tilting drive worm wheel 130. The tilting drive worm wheel 130 is fixedly mounted on the support short shaft. The tilting drive worm 116 is rotatably mounted on the lifting drive sleeve 121 through the first worm bracket, and the tilting drive worm 116 meshes with the tilting drive worm wheel 130, thereby realizing both tilting drive and rotational position locking. The tilting drive motor 115 is fixedly mounted on the first worm bracket and is used to drive the tilting drive worm 116 to rotate. The tilting drive motor 115 is driven and controlled by the control cabinet 129.

[0037] like Figure 1 , 2As shown in Figure 5, the proportioning conveying mechanism includes a carrier box 103, a batching drive motor 127, and a batching conveying auger 126. The carrier boxes 103 of each proportioning conveying mechanism are arranged longitudinally, and the bottom of each carrier box 103 is configured as a V-shaped base plate 106, on which a support leg 102 is vertically mounted. The top of the carrier box 103 is provided with a feed opening 104 for receiving raw materials from the carrier hopper 114. A vibrator 107 is mounted on one side plate of the V-shaped base plate 106, and the batching conveying auger 126... The lower end is fixed to the other side plate of the V-shaped base plate 106, and the feed inlet of the batching conveying auger 126 is connected to the low position of the V-shaped base plate 106; the batching drive motor 127 is installed at the upper end of the batching conveying auger 126 and drives the batching conveying auger 126 to rotate through the sprocket transmission mechanism; the discharge port of the batching conveying auger 126 extends to the upper part of the feed inlet of the horizontal mixing device through the discharge conveying pipe 128; the batching drive motor 127 and the vibration drive motor of the vibrator 107 are both driven and controlled by the control cabinet 129. The V-shaped base plate 106 allows the raw materials to converge to the lowest position at the bottom, thus facilitating the conveying of the batching conveying auger 126; the vibrator 107 ensures that the raw materials quickly converge to the low position of the V-shaped base plate 106.

[0038] like Figure 2 As shown, a diagonal tie rod 124 is provided between the upper part of the bearing box 103 and the batching conveying auger 126 to enhance the structural strength of the batching conveying auger 126.

[0039] like Figure 5 As shown, an observation glass window 105 is vertically provided on the left side of the carrier box 103, so that the staff can easily observe the remaining raw materials in each carrier box 103.

[0040] like Figure 6-9As shown, the horizontal mixing device includes a cylindrical tank 204, a rotary support mechanism, a mixing mechanism, a feeding mechanism, and a discharging mechanism. Rotary support shafts 205 are installed on the front and rear outer walls of the cylindrical tank 204, and these shafts intersect perpendicularly with the central axis of the cylindrical tank 204. Two rotary support shafts 205 are mounted on the rotary support mechanism, which drives their rotation. The mixing mechanism, feeding mechanism, and discharging mechanism are all mounted on the cylindrical tank 204. The feeding mechanism feeds the raw material to be mixed into the cylindrical tank 204, the mixing mechanism mixes the material, and the discharging mechanism releases the mixed material from the cylindrical tank 204. The rotary support mechanism, mixing mechanism, feeding mechanism, and discharging mechanism are all controlled by the control cabinet 129. The rotating support mechanism can rotate and support the cylindrical tank 204. During the mixing operation, the cylindrical tank 204 can be rotated and adjusted to a horizontal position to ensure the mixing effect of the internal raw materials. When discharging the raw materials, the cylindrical tank 204 can be adjusted to an inclined position to facilitate the discharge of the mixed raw materials from the discharge mechanism.

[0041] like Figure 6-9 As shown, the stirring mechanism includes a stirring drive motor 210, a stirring shaft 220, and multiple stirring units; each stirring unit includes a stirring rod 222 and two radial rods 221; the stirring shaft 220 is rotatably mounted inside the cylindrical tank 204 and is located on the central axis of the cylindrical tank 204; one end of the stirring shaft 220 extends out of the cylindrical tank 204, and a stirring driven sprocket 207 is fixedly mounted on the extended end; the stirring drive motor 210 is fixedly mounted on the side of the cylindrical tank 204. A stirring drive sprocket 208 is mounted on the output shaft of the stirring drive motor 210; the stirring driven sprocket 207 and the stirring drive sprocket 208 are connected by a stirring transmission chain 209; one end of each of the two radial rods 221 is vertically fixed to the stirring shaft 220, and the stirring rod 222 is fixed to the other end of the two radial rods 221, with a beveled surface 231 close to the inner wall of the cylindrical tank 204 on the stirring rod 222; the stirring drive motor 210 is driven and controlled by the control cabinet 129. By utilizing the beveled surface 231 close to the inner wall of the cylindrical tank 204, the raw materials can be reliably scooped and transported, ensuring the comprehensive mixing of the raw materials.

[0042] like Figure 8 and 9 As shown, guide plates 223 are spaced apart on the stirring rod 222, with each guide plate 223 arranged in pairs, and the two guide plates 223 in each pair arranged in a figure-eight pattern. The figure-eight arrangement of the guide plates 223 allows for the left and right distribution of the raw materials, further enhancing the mixing effect.

[0043] like Figure 6 and 8As shown, the rotating support mechanism includes a second support base plate 201, a rotating drive motor 211, a rotating drive worm 212, a rotating drive worm wheel 206, and two rotating support side plates 202. Both rotating support side plates 202 are vertically mounted on the second support base plate 201, and two rotating support shafts 205 are rotatably mounted on the upper ends of the two rotating support side plates 202, respectively. The rotating drive worm wheel 206 is fixedly mounted on the end of one of the rotating support shafts 205. The rotating drive worm 212 is rotatably mounted on the rotating support side plate 202 via a second worm bracket, and the rotating drive worm 212 meshes with the rotating drive worm wheel 206. The rotating drive motor 211 is mounted on the second worm bracket and is used to drive the rotating drive worm 212. The rotating drive motor 211 is driven and controlled by the control cabinet 129. The cooperation of the rotating drive worm 212 and the rotating drive worm wheel 206 ensures the stability of the rotating drive and allows for angle locking after rotation.

[0044] like Figure 6 and 8 As shown, the feeding mechanism includes a feeding drive motor 213, a feeding drive screw 216, a feeding sealing plate 215, and a feeding collection trough 217. The bottom of the feeding collection trough 217 is configured as a feeding ramp 218 that is low in the middle and high at both ends, and a feeding rectangular frame 219 is connected to the middle of the bottom of the feeding collection trough 217. When the columnar tank 204 is in a horizontal state, the feeding collection trough 217 is located below each of the discharge conveying pipes 128. A feeding strip-shaped insertion hole is provided on the side of the feeding frame 219, and the feeding sealing plate 215 is inserted into the feeding rectangular frame 219 through the feeding strip-shaped insertion hole to isolate and seal it. A side support groove 224 is provided on the inner wall of the feeding frame 219 to support the feeding closing plate 215; a feeding drive seat 214 is provided on the outer side of the feeding closing plate 215, and a feeding drive screw 216 is rotatably mounted on the side of the feeding rectangular frame 219, parallel to the insertion and withdrawal direction of the feeding closing plate 215, and the feeding drive screw 216 is threadedly screwed onto the feeding drive seat 214; a feeding drive motor 213 is fixed on the cylindrical tank 204 to drive the feeding drive screw 216 to rotate; the feeding drive motor 213 is driven and controlled by the control cabinet 129. By using the feeding drive screw 216 to drive the feeding drive seat 214, the insertion and withdrawal movement of the feeding closing plate 215 is realized, and the feeding rectangular frame 219 is opened and closed.

[0045] like Figure 6 and 8As shown, the discharge mechanism includes a discharge drive motor 230, a discharge drive screw 229, and a discharge sealing plate 226. A discharge port 225 is provided on the lower side of the end face of the cylindrical tank 204, and a discharge channel 227 is connected to the discharge port 225. A discharge strip-shaped insertion hole is provided on the side of the discharge channel 227, and the discharge sealing plate 226 is inserted into the discharge strip-shaped insertion hole. A discharge drive seat 228 is provided on the outer side of the discharge sealing plate 226. The discharge drive screw 229 is rotatably installed on the side of the discharge channel 227 and is parallel to the insertion / removal direction of the discharge sealing plate 226. The discharge drive screw 229 is threaded through and screwed onto the discharge drive seat 228. The discharge drive motor 230 is fixedly installed on the cylindrical tank 204 and is used to drive the discharge drive screw 229 to rotate. The discharge drive motor 230 is driven and controlled by the control cabinet 129. The discharge drive screw 229 drives the discharge drive seat 228 to realize the insertion and withdrawal movement of the discharge sealing plate 226, thereby opening and closing the discharge port 225.

[0046] like Figure 1 , 10 As shown in Figure 11, the weighing and bagging device includes a receiving hopper 302, an auger conveyor mechanism, a bagging mechanism, and a weighing mechanism. The receiving hopper 302 is installed on the third support base plate 301. The lower inlet of the auger conveyor mechanism extends into the receiving hopper 302, and the upper outlet of the auger conveyor mechanism is connected to a conveying pipe 331. The bagging mechanism is suspended on the lower end of the conveying pipe 331 and is used to clamp the bag opening of the raw material bag 308 and release the mixed raw material into the raw material bag 308. The weighing mechanism is located below the bagging mechanism and is used to weigh the raw material bag 308. The auger conveyor mechanism, the bagging mechanism, and the weighing mechanism are all driven and controlled by the control cabinet 129.

[0047] like Figure 1 and 10 As shown, a confluence slope 303 is provided at the bottom of the receiving hopper 302, and a short column 304 supporting the third support base plate 301 is provided below the confluence slope 303, thereby enhancing the support strength of the confluence slope 303.

[0048] like Figure 1 and 10As shown, the auger conveying mechanism includes a release button 337, a conveying auger 332, a conveying drive motor 333, a buffer tank 330, and a support column 334. The lower feed inlet of the conveying auger 332 extends into the bottom of the receiving hopper 302. The upper end of the support column 334 is fixedly supported in the middle of the conveying auger 332, and the lower end is vertically fixedly supported on the third support base plate 301. The release button 337 is installed on the support column 334 and electrically connected to the control cabinet 129. The conveying drive motor 333 is fixed to the upper end of the conveying auger 332 and drives the conveying auger 332 to rotate through a sprocket transmission mechanism. The conveying pipe 331 is connected to the upper discharge port of the conveying auger 332. The buffer tank 330 is connected to the lower end of the conveying pipe 331. The conveying drive motor 333 is driven and controlled by the control cabinet 129.

[0049] like Figure 1 , 10As shown in Figure 11, the bagging mechanism includes a release box 320, a release drive motor 336, a release roller 321, a release push seat 325, a push spring 328, a rectangular release channel 310, and a bag mouth clamping unit; the top of the release box 320 is provided with a release inlet 324, and is connected to the bottom of the buffer box 330 through the release inlet 324; the release roller 321 is rotatably and longitudinally installed in the release box 320, and various distributing protrusions 322 are longitudinally arranged on the circumferential wall of the release roller 321, and each distributing protrusion... The cross-section of strip 322 is an isosceles triangle, thereby realizing the quantitative distribution of raw materials; the shaft head of the release roller 321 extends out of the release box 320, and a release driven gear 335 is installed on the extended end; the release drive motor 336 is fixed on the release box 320 by a motor bracket, and a release drive gear that meshes with the release driven gear 335 is provided on the output shaft of the release drive motor 336; a telescopic limiting groove 338 is provided on the side of the release box 320, and the release push seat 325 is slidably installed on the telescopic limiting groove. A limit adjusting bolt 327 is vertically provided in the groove 338 and on the inner end face of the release push seat 325; the limit adjusting bolt 327 extends through the release box 320 and an adjusting nut 339 is threadedly screwed onto the through end; the push spring 328 is installed in the telescopic limit groove 338 and elastically supported on the inner end face of the release push seat 325; an arc-shaped push surface 329 that mates with the circumferential wall of the release roller 321 is provided on the outer end face of the release push seat 325; at the outer end of the release push seat 325... A guide slope 326 is provided at the upper edge of the surface, and the release inlet 324 is located above the circumferential wall between the guide slope 326 and the release roller 321; a release connecting pipe 319 is provided at the bottom of the release box 320, the upper end of the rectangular release channel 310 is connected to the release connecting pipe 319, and the lower end of the rectangular release channel 310 is open; a bag mouth clamping unit is installed on the lower outer wall of the rectangular release channel 310 for clamping the bag mouth of the raw material bag 308; the release drive motor 336 is driven and controlled by the control cabinet 129. The push spring 328 can elastically push the release push seat 325, so that the arc-shaped push surface 329 and the circumferential wall of the release roller 321 maintain a certain elastic push distance, which facilitates quantitative distribution of raw materials. The guide slope 326 can allow the raw materials above to enter the gap between the arc-shaped push surface 329 and the release roller 321 for distribution. The limit adjustment bolt 327 and the adjustment nut 339 can be used to adjust the distance between the arc-shaped push surface 329 and the release roller 321, thereby meeting the distribution needs of raw materials with different particle sizes.

[0050] like Figure 1 , 10As shown in Figure 11, the bag opening clamping unit includes a strip-shaped fixing seat 315, a sliding block 313, a handle bar 318, two swing rods 309, two drive connecting rods 312, and two clamping rods 311. The strip-shaped fixing seat 315 is vertically fixed to the lower front side wall of the rectangular release channel 310, and a T-shaped groove 316 is vertically provided on the strip-shaped fixing seat 315. The sliding block 313 is slidably installed in the T-shaped groove 316 to ensure the stability of the sliding block 313 sliding up and down. The handle bar 318 is vertically fixed to the upper end of the sliding block 313. The middle parts of the two swing rods 309 are rotatably installed on the front side wall of the rectangular release channel 310. The front ends of the two clamping rods 311 are respectively vertically... The two clamping rods 311 are fixed to the lower ends of the two swing rods 309 and extend longitudinally to the left and right side walls of the rectangular release channel 310. Anti-slip strips 314 are longitudinally provided on the left and right side walls for clamping and cooperating with the clamping rods 311, thereby ensuring the stability of the bag mouth clamping of the raw material bag 308. The upper ends of the two driving connecting rods 312 are respectively swing-hinged and installed on the upper ends of the two swing rods 309, and the lower ends of the two driving connecting rods 312 are swing-hinged and installed on the lower ends of the sliding block 313. A rebound spring 317 is provided at the lower end of the T-shaped slide groove 316, and the rebound spring 317 is elastically supported on the lower end surface of the sliding block 313 for pushing the sliding block 313 upward. The spring 317 can always elastically push the sliding block 313, thereby ensuring the elastic clamping state of the two clamping rods 311 and elastically clamping the opening of the raw material bag 308; the handle 318 can be used to push the sliding block 313 upward to contact the clamping state of the two clamping rods 311, and remove the raw material bag 308 for sealing.

[0051] like Figure 1 and 10 As shown, the weighing mechanism includes a support chassis 305, four weighing sensors 306, and a U-shaped support plate 307. The support chassis 305 is horizontally mounted on a third support base plate 301, and the four weighing sensors 306 are distributed on the upper side of the support chassis 305. The bottom plate of the U-shaped support plate 307 is mounted on the four weighing sensors 306, and the two vertical side plates of the U-shaped support plate 307 limit the raw material bag 308. All four weighing sensors 306 are electrically connected to the control cabinet 129, so as to perform real-time weighing during the bagging process of the raw material bag 308 and ensure that the bagging weight of each raw material bag 308 is basically consistent.

[0052] The raw material proportioning, mixing, and weighing system for producing PVC cables disclosed in this invention includes a control cabinet 129 comprising a controller, a display screen, a keypad, a longitudinal movement drive circuit, a lifting drive circuit, a tilting drive circuit, a stirring drive circuit, a vibration drive circuit, a batching drive circuit, a rotation drive circuit, a feeding drive circuit, a discharging drive circuit, a conveying drive circuit, and a release drive circuit. The controller is electrically connected to the display screen, the keypad, four weighing sensors 306, the longitudinal movement drive circuit, the lifting drive circuit, the tilting drive circuit, the stirring drive circuit, the vibration drive circuit, the batching drive circuit, the rotation drive circuit, the feeding drive circuit, the discharging drive circuit, the conveying drive circuit, and the release drive circuit. The longitudinal movement drive circuit, the lifting drive circuit, the tilting drive circuit, the stirring drive circuit, the vibration drive circuit, the batching drive circuit, and the rotation drive circuit are all part of this system. The feeding drive circuit, discharging drive circuit, conveying drive circuit, and release drive circuit are used to drive and control the longitudinal movement drive motor 123, the lifting drive motor 109, the tilting drive motor 115, the stirring drive motor 210, the vibration drive motor of the vibrator 107, the batching drive motor 127, the rotary drive motor 211, the feeding drive motor 213, the discharging drive motor 230, the conveying drive motor 333, and the release drive motor 336, respectively. Among them, the longitudinal movement drive motor 123, the lifting drive motor 109, the tilting drive motor 115, the stirring drive motor 210, the batching drive motor 127, the rotary drive motor 211, the feeding drive motor 213, the discharging drive motor 230, the conveying drive motor 333, and the release drive motor 336 are all stepper motors, and the corresponding drive circuits are all existing stepper motor drive circuits.

[0053] The raw material proportioning, mixing, and weighing system for producing PVC cables disclosed in this invention includes the following steps during use:

[0054] First, workers load the raw materials into the corresponding carrier boxes 103. Specifically, they first pour the raw materials into the carrier hopper 114, then press the corresponding number of the carrier box 103 on the button panel, and then press the tilt button. The controller then coordinates the longitudinal drive motor 123, the lifting drive motor 109, and the tilt drive motor 115 to move the carrier hopper 114 to the upper side of the corresponding numbered carrier box 103, and pour the raw materials from the feed opening 104 into the corresponding numbered carrier box 103. During subsequent operation, workers observe which carrier box 103 is running low on raw materials through the glass window 105 and repeat the above process to replenish the raw materials.

[0055] Then, the worker starts the horizontal mixing device by pressing the mixing start button on the control panel. Specifically, the controller first drives the feed drive motor 213 to pull out the feed sealing plate 215, opening the feed rectangular frame 219. Then, it drives each batching drive motor 127, pre-setting the running time of each batching drive motor 127 according to the proportion of each raw material. After starting, the controller directly drives each batching drive motor 127 according to its respective running time. After each batching drive motor 127 has finished feeding a batch of raw materials, the controller drives the feed drive motor 213 again to open the feed sealing plate 219. Plate 215 is inserted to close the feed rectangle 219. Then, the stirring drive motor 210 and the rotary drive motor 211 are driven and controlled, so that the cylindrical tank 204 rotates and shakes back and forth while being stirred, thereby effectively enhancing the mixing effect. After the mixing time is reached, the controller stops driving the stirring drive motor 210 and the rotary drive motor 211, and then drives the discharge drive motor 230 to pull out the discharge sealing plate 226. Then, the rotary drive motor 211 is driven and controlled, so that the discharge channel 227 of the cylindrical tank 204 tilts downward, discharging the mixed raw materials into the receiving hopper 302.

[0056] Finally, the weighing and bagging operation is performed. Specifically, the worker initiates the bagging start operation via the bagging start button on the control panel. The controller drives the conveyor motor 333 to deliver the mixed raw materials into the buffer box 330. The worker places an empty raw material bag 308 on the U-shaped support plate 307, then pushes down the handle 318, raising the two clamping rods 311. The upper opening of the raw material bag 308 is then placed onto the rectangular release channel 310. The handle 318 is then lowered, and the two clamping rods 311 clamp the raw material bag 308. The upper opening of the bag is clamped, and then the release button 337 is pressed. The controller drives the release drive motor 336, and the release roller 321 rotates to fill the raw material bag 308 with raw materials. The four weighing sensors 306 weigh the material in real time. After the weight reaches the preset value, the controller stops driving the release drive motor 336. The worker removes the raw material bag 308 and seals it. Then, another empty raw material bag 308 is placed on the U-shaped support plate 307. The subsequent process is repeated to complete the quantitative loading of each raw material bag 308.

[0057] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A raw material proportioning, mixing, and weighing system for producing PVC cables, characterized in that: The system includes a control cabinet (129), a raw material proportioning device, a horizontal mixing device, and a weighing and bagging device. The raw material proportioning device includes a lifting and tilting mechanism and multiple proportioning conveying mechanisms. The lifting and tilting mechanism is used to load the raw materials to be added and transport and tilt the raw materials to be added into the corresponding proportioning conveying mechanism. The discharge port of each proportioning conveying mechanism is connected to the inlet of the horizontal mixing device. Each proportioning conveying mechanism quantitatively transports the raw materials loaded to the horizontal mixing device, and the horizontal mixing device mixes the received raw materials. The weighing and bagging device is used to receive the raw materials mixed by the horizontal mixing device and quantitatively load the mixed raw materials into the raw material bag (308). The lifting and tilting mechanism, each proportioning conveying mechanism, the horizontal mixing device, and the weighing and bagging device are all driven and controlled by the control cabinet (129).

2. The raw material proportioning, mixing, and weighing system for producing PVC cables according to claim 1, characterized in that: The lifting and tilting mechanism includes a carrying bucket (114), a longitudinal movement drive unit, a lifting drive unit, and a tilting drive unit; the carrying bucket (114) is mounted on the tilting drive unit, the tilting drive unit is mounted on the lifting drive unit, and the lifting drive unit is mounted on the longitudinal movement drive unit. The tilting drive unit tilts the carrying bucket (114), the lifting drive unit lifts the tilting drive unit, and the longitudinal movement drive unit moves the lifting drive unit longitudinally. The longitudinal movement drive unit, the lifting drive unit, and the tilting drive unit are all driven and controlled by the control cabinet (129).

3. The raw material proportioning, mixing, and weighing system for producing PVC cables according to claim 2, characterized in that: The proportioning conveying mechanism includes a carrying box (103), a batching drive motor (127), and a batching conveying auger (126); the carrying boxes (103) of each proportioning conveying mechanism are arranged longitudinally, and the bottom of the carrying box (103) is set as a V-shaped base plate (106), and a bearing support leg (102) is vertically installed on the V-shaped base plate (106); the top of the carrying box (103) is provided with a feed opening (104) for receiving raw materials from the carrying hopper (114); a vibrator (107) is installed on one side plate of the V-shaped base plate (106), and the batching conveying auger (126) The lower end of the ) is fixed on the other side plate of the V-shaped base plate (106), and the feed port of the batching conveying auger (126) is connected to the low position of the V-shaped base plate (106); the batching drive motor (127) is installed at the upper end of the batching conveying auger (126) and drives the batching conveying auger (126) to rotate through the sprocket transmission mechanism; the discharge port of the batching conveying auger (126) extends to the upper part of the feed port of the horizontal mixing device through the discharge conveying pipe (128); the batching drive motor (127) and the vibration drive motor of the vibrator (107) are both driven and controlled by the control cabinet (129).

4. The raw material proportioning, mixing, and weighing system for producing PVC cables according to claim 1, characterized in that: The horizontal mixing device includes a cylindrical tank (204), a rotating support mechanism, a mixing mechanism, a feeding mechanism, and a discharging mechanism. Rotating support shafts (205) are provided on the front and rear outer walls of the middle part of the cylindrical tank (204), and the rotating support shafts (205) intersect perpendicularly with the central axis of the cylindrical tank (204). Two rotating support shafts (205) are installed on the rotating support mechanism, and the rotating support mechanism drives the rotating support shafts (205) to rotate. The mixing mechanism, the feeding mechanism, and the discharging mechanism are all installed on the cylindrical tank (204). The feeding mechanism puts the raw material to be mixed into the cylindrical tank (204), the mixing mechanism mixes the raw material in the cylindrical tank (204), and the discharging mechanism releases the mixed raw material in the cylindrical tank (204). The rotating support mechanism, the mixing mechanism, the feeding mechanism, and the discharging mechanism are all driven and controlled by the control cabinet (129).

5. The raw material proportioning, mixing, and weighing system for producing PVC cables according to claim 4, characterized in that: The stirring mechanism includes a stirring drive motor (210), a stirring shaft (220), and multiple stirring units; each stirring unit includes a stirring rod (222) and two radial rods (221); the stirring shaft (220) is rotatably installed inside the cylindrical tank (204) and located on the central axis of the cylindrical tank (204); one end of the stirring shaft (220) extends out of the cylindrical tank (204), and a stirring driven sprocket (207) is fixedly installed on the extended end; the stirring drive motor (210) is fixedly installed on the side of the cylindrical tank (204) and is used for stirring. A stirring drive sprocket (208) is mounted on the output shaft of the drive motor (210); the stirring driven sprocket (207) and the stirring drive sprocket (208) are driven by a stirring transmission chain (209); one end of each of the two radial rods (221) is vertically fixed on the stirring shaft (220), and the stirring rod (222) is fixed on the other end of the two radial rods (221), and the stirring rod (222) is provided with a beveled surface (231) close to the inner wall of the cylindrical tank (204); the stirring drive motor (210) is driven and controlled by the control cabinet (129).

6. The raw material proportioning, mixing, and weighing system for producing PVC cables according to claim 5, characterized in that: Each guide plate (223) is spaced apart on the stirring rod (222), and each guide plate (223) is arranged in pairs, with each pair of guide plates (223) arranged in a figure-eight pattern.

7. The raw material proportioning, mixing, and weighing system for producing PVC cables according to claim 1, characterized in that: The weighing and bagging device includes a receiving hopper (302), an auger conveyor mechanism, a bagging mechanism, and a weighing mechanism. The receiving hopper (302) is installed on the third support base plate (301). The lower end of the auger conveyor mechanism extends into the receiving hopper (302), and the upper end of the auger conveyor mechanism is connected to a conveying pipe (331). The bagging mechanism is suspended on the lower end of the conveying pipe (331) and is used to clamp the bag mouth of the raw material bag (308) and release the mixed raw material into the raw material bag (308). The weighing mechanism is located below the bagging mechanism and is used to weigh the raw material bag (308). The auger conveyor mechanism, the bagging mechanism, and the weighing mechanism are all driven and controlled by the control cabinet (129).

8. The raw material proportioning, mixing, and weighing system for producing PVC cables according to claim 7, characterized in that: The auger conveying mechanism includes a release button (337), a conveying auger (332), a conveying drive motor (333), a buffer box (330), and a support column (334); the lower feed inlet of the conveying auger (332) extends into the bottom of the receiving hopper (302); the upper end of the support column (334) is fixedly supported in the middle of the conveying auger (332), and the lower end is vertically fixedly supported on the third support base plate (301); the release button (337) is installed on the support... The column (334) is electrically connected to the control cabinet (129); the conveying drive motor (333) is fixed on the upper end of the conveying auger (332) and drives the conveying auger (332) to rotate through the sprocket transmission mechanism; the conveying pipe (331) is connected to the upper end of the conveying auger (332) at the discharge port; the buffer box (330) is connected to the lower end of the conveying pipe (331) at the pipe opening; the conveying drive motor (333) is driven and controlled by the control cabinet (129).

9. The raw material proportioning, mixing, and weighing system for producing PVC cables according to claim 7, characterized in that: The bagging mechanism includes a release box (320), a release drive motor (336), a release roller (321), a release push seat (325), a push spring (328), a rectangular release channel (310), and a bag mouth clamping unit; the top of the release box (320) is provided with a release inlet (324), and is connected to the bottom of the buffer box (330) through the release inlet (324); the release roller (321) is rotated and longitudinally installed in the release box (320), and each distribution protrusion (322) is longitudinally provided on the circumferential wall of the release roller (321), and each distribution... The cross-section of the protruding strip (322) is an isosceles triangle; the shaft head of the release roller (321) extends out of the release box (320), and a release driven gear (335) is installed on the extended end; the release drive motor (336) is fixed on the release box (320) by a motor bracket, and a release drive gear that meshes with the release driven gear (335) is provided on the output shaft of the release drive motor (336); a telescopic limiting groove (338) is provided on the side of the release box (320), and the release push seat (325) is slidably installed in the telescopic limiting groove (338), and A limit adjusting bolt (327) is vertically provided on the inner end face of the release push seat (325); the limit adjusting bolt (327) extends through and out of the release box (320), and an adjusting nut (339) is threadedly installed on the through end; the push spring (328) is installed in the telescopic limit groove (338) and elastically supported on the inner end face of the release push seat (325); an arc-shaped push surface (329) that matches the circumferential wall of the release roller (321) is provided on the outer end face of the release push seat (325); at the edge of the outer end face of the release push seat (325) A guide slope (326) is provided, and the release inlet (324) is located above the circumferential wall between the guide slope (326) and the release roller (321). A release connecting pipe (319) is provided at the bottom of the release box (320), and the upper end of the rectangular release channel (310) is connected to the release connecting pipe (319). The lower end of the rectangular release channel (310) is open. The bag mouth clamping unit is installed on the lower outer wall of the rectangular release channel (310) for clamping the bag mouth of the raw material bag (308). The release drive motor (336) is driven and controlled by the control cabinet (129).

10. The raw material proportioning, mixing, and weighing system for producing PVC cables according to claim 9, characterized in that: The bag opening clamping unit includes a strip-shaped fixing seat (315), a sliding block (313), a handle (318), two swing rods (309), two drive linkages (312), and two clamping rods (311); the strip-shaped fixing seat (315) is vertically fixed on the lower front side wall of the rectangular release channel (310), and a T-shaped groove (316) is vertically provided on the strip-shaped fixing seat (315); the sliding block (313) is slidably installed in the T-shaped groove (316), and the handle (318) is vertically fixed on the upper end of the sliding block (313); the middle parts of the two swing rods (309) are rotatably installed on the front side wall of the rectangular release channel (310); the two clamping rods (311) The front ends of the two levers (309) are vertically fixed to the lower ends of the two clamping rods (311), and the rear ends of the two clamping rods (311) extend longitudinally to the left and right side walls of the rectangular release channel (310), and anti-slip strips (314) for clamping and cooperating with the clamping rods (311) are longitudinally provided on the left and right side walls; the upper ends of the two drive connecting rods (312) are respectively swing-hinged on the upper ends of the two levers (309), and the lower ends of the two drive connecting rods (312) are swing-hinged on the lower ends of the sliding block (313); a rebound spring (317) is provided at the lower end of the T-shaped slide groove (316), and the rebound spring (317) is elastically supported on the lower end surface of the sliding block (313).

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