Split type underground power supply cable conveying structure
By introducing a cleaning unit into the downhole power supply cable conveying structure, and using arc plates and cleaning brushes to clean the cable surface, the problem of cable slippage is solved and the normal transmission of the cable is achieved.
Patent Information
- Application Number
- CN202311417076.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-30
- Publication Date
- 2025-05-06
AI Technical Summary
The existing underground power supply cable conveying device cannot effectively clean up the silt and impurities on the cable surface, causing the cable to slip and affect normal transportation.
A split-type downhole power supply cable conveying structure is designed, including a conveying unit and a cleaning unit. The conveying unit includes a cable tray, and the cleaning unit includes a curved plate and a cleaning brush that is used to clamp the cable and clean the cable surface.
Clean the cable surface when the cable is released to prevent the cable from slipping during subsequent transport and ensure the normal transport of the cable.
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Figure CN119929589A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of underground power supply cable transmission, and in particular to a split underground power supply cable transmission structure. Background Art
[0002] Power cables are used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas. In underground operations, some electromechanical equipment used in lighting, coal mining, transportation, ventilation, drainage, and environmental protection are usually required, and the normal operation of electromechanical equipment is inseparable from power cables.
[0003] In order to solve the problem of underground power supply cable transportation, publication number CN212101347U discloses a pneumatic cable transportation device for underground coal mines, comprising a fixed vehicle seat, an adjustable vehicle seat, a wheel seat, a driven wheel, a driving wheel, an adjusting seat, a fixed clamp seat and a sliding clamp seat, wherein an adjustable vehicle seat is movably installed on one side of the fixed vehicle seat; the utility model rotates a first threaded rod by a first turning handle, thereby driving the adjusting vehicle seat to move on the first threaded rod until the driven wheel spacing at the bottom and the driving wheel spacing match the track spacing, so as to facilitate the application of the transportation device on different tracks; rotates a second threaded rod by a second turning handle, thereby driving the sliding clamp seat to move in a slide groove in the adjusting seat as the second threaded rod rotates, adjusting the spacing between the fixed clamp seat and the sliding clamp seat, and then placing the cable between the adjusting seats on both sides, driving the adjusting seat to move by the elastic deformation of the spring, and then clamping and fixing the cable between the fixed clamp seat and the sliding clamp seat, so as to realize fixed transportation of different cables;
[0004] However, the existing device still has the problem that the sand and impurities attached to the cable surface cannot be cleaned, which easily causes the cable to slip and affects the normal transmission of the cable. Summary of the invention
[0005] The purpose of the present invention is to provide a split underground power supply cable transmission structure to solve the problem that the cable slips due to mud and impurities attached to the cable surface, thus affecting the normal transmission of the cable.
[0006] In order to solve the above technical problems, the technical solution provided by the present invention is:
[0007] A split underground power supply cable conveying structure comprises a conveying unit and a cleaning unit; the conveying unit comprises a cable drum, which can rotate around its own axis to release the cable; the cleaning unit comprises an arc plate and a cleaning brush, which is installed on the arc plate, and the two arc plates can move towards each other to drive the cleaning brush to clamp the cable, and the cleaning brush is used to clean the surface of the cable.
[0008] Furthermore, the cleaning unit also includes an opening and closing screw, a first slider and a second slider; two arc plates are respectively connected to the first slider and the second slider; the first slider and the second slider are threadedly connected to the opening and closing screw; the opening and closing screw is provided with a left-handed thread and a right-handed thread, the first slider is screwed with the left-handed thread, and the second slider is screwed with the right-handed thread.
[0009] Furthermore, the cleaning unit also includes a support frame, and the opening and closing screw is rotatably installed on the support frame; the first sliding block and the second sliding block are both in contact with the support frame and are slidably connected to the support frame.
[0010] Furthermore, the cleaning unit also includes a cleaning motor, which is connected to the opening and closing screw and is used to drive the opening and closing screw to rotate around its own axis.
[0011] Furthermore, the conveying unit also includes a C-shaped bracket, a first rotating rod, an electric push rod and a clamping block. The first rotating rod is rotatably installed on the C-shaped bracket, the electric push rod is installed on the first rotating rod, and the clamping block is connected to the output end of the electric push rod; the electric push rod extends to drive the clamping block to clamp on the cable reel.
[0012] Furthermore, the conveying unit also includes a double-headed motor, a second rotating rod, a driving wheel and a driven wheel; the output end of the double-headed motor is connected to the second rotating rod, the driving wheel is sleeved on the second rotating rod and connected to the second rotating rod, and the driven wheel is sleeved on the first rotating rod and connected to the first rotating rod; the double-headed motor drives the second rotating rod to rotate to drive the driving wheel to rotate, and then the driving wheel drives the driven wheel to rotate to drive the first rotating rod to rotate.
[0013] Furthermore, the split-type underground power supply cable conveying structure also includes a base plate and wheels; the wheels are installed on the base plate, and the conveying unit and the cleaning unit are installed on the base plate.
[0014] Furthermore, the split-type underground power supply cable transmission structure also includes a fixing unit, which includes a fixing nail. The fixing nail is slidably installed on the bottom plate and can move along its own axis to be inserted into the ground.
[0015] Furthermore, the fixing unit also includes a support plate, a slide cylinder and a slide rod; the slide cylinder is installed on the base plate, the slide rod and the fixing nail are both installed on the support plate, the slide rod is inserted into the slide cylinder and is slidably connected to the slide cylinder; the support plate moves along the axial direction of the fixing nail to drive the fixing nail to be inserted into the ground.
[0016] Furthermore, the fixing unit also includes a threaded rod and a threaded sleeve; the threaded rod is rotatably installed on the base plate, and the threaded sleeve is installed on the support plate; the threaded rod is inserted into the threaded sleeve and is threadedly connected with the threaded sleeve; the threaded rod rotates around its own axis to drive the threaded sleeve to move, and then drives the support plate, sliding rod and fixing nail to move so that the fixing nail is inserted into the ground.
[0017] Based on the above technical solutions, the technical effects that can be achieved by the present invention are:
[0018] The split-type underground power supply cable conveying structure provided by the present invention includes a conveying unit and a cleaning unit; the conveying unit includes a cable reel, which can rotate around its own axis to release the cable; the cleaning unit includes an arc plate and a cleaning brush, which is installed on the arc plate, and the two arc plates can move toward each other to drive the cleaning brush to clamp the cable, and the cleaning brush is used to clean the surface of the cable.
[0019] The split downhole power supply cable conveying structure provided by the present invention can clean the surface of the cable when the cable is released through the cooperation of the conveying unit and the cleaning unit, thereby preventing the cable from slipping during the subsequent conveying process and ensuring the normal conveying of the cable. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 A schematic structural diagram of a split downhole power supply cable transmission structure provided by an embodiment of the present invention;
[0022] Figure 2 is a cross-sectional schematic diagram of a cleaning unit;
[0023] Figure 3 for Figure 2 A partial view of
[0024] Figure 4 is a cross-sectional schematic diagram of a conveying unit;
[0025] Figure 5 Another structural schematic diagram of the split downhole power supply cable transmission structure provided by an embodiment of the present invention;
[0026] Figure 6 is a cross-sectional schematic diagram of a fixed unit;
[0027] Figure 7 for Figure 6 A partial enlarged view of point A in the middle.
[0028] Icons: 100-conveying unit; 200-cleaning unit; 300-bottom plate; 400-wheel; 500-fixing unit; 110-cable drum; 120-C-shaped bracket; 130-first rotating rod; 140-electric push rod; 150-block; 160-double-headed motor; 170-second rotating rod; 180-driving wheel; 190-driven wheel; 1110-connecting plate; 210-arc plate; 220-cleaning brush; 230-opening and closing screw; 240-first slider; 250-second slider; 260-support frame; 270-cleaning motor; 510-fixing nail; 520-threaded rod; 530-threaded sleeve; 540-support plate; 550-slide cylinder; 560-slide rod. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0032] The existing power supply cable device has mud and impurities attached to the cable surface that cannot be cleaned, which easily causes the cable to slip and affects the normal transmission of the cable.
[0033] In view of this, the present invention provides a split-type underground power supply cable conveying structure, including a conveying unit 100 and a cleaning unit 200; the conveying unit 100 includes a cable reel 110, and the cable reel 110 can rotate around its own axis to release the cable; the cleaning unit 200 includes an arc plate 210 and a cleaning brush 220, and the cleaning brush 220 is installed on the arc plate 210. The two arc plates 210 can move toward each other to drive the cleaning brush 220 to clamp the cable, and the cleaning brush 220 is used to clean the surface of the cable.
[0034] The split downhole power supply cable conveying structure provided by the present invention can clean the surface of the cable when the cable is released through the cooperation of the conveying unit 100 and the cleaning unit 200, thereby preventing the cable from slipping during subsequent conveying and ensuring normal conveying of the cable.
[0035] The following combination Figure 1-Figure 7 The structure and shape of the split downhole power supply cable transmission structure provided in this embodiment are described in detail:
[0036] In this embodiment, the split underground power cable transmission structure further includes a bottom plate 300, wheels 400 and a fixing unit 500. Figure 1 As shown, the conveying unit 100 and the cleaning unit 200 are installed on the upper surface of the bottom plate 300 , the wheels 400 are installed on the lower surface of the bottom plate 300 , and the fixing unit 500 is installed on the bottom plate 300 .
[0037] In this embodiment, the conveying unit 100 includes a cable drum 110, a C-shaped bracket 120, a first rotating rod 130, an electric push rod 140, a clamping block 150, a double-headed motor 160, a second rotating rod 170, a driving wheel 180, a driven wheel 190 and a connecting plate 1110. Figure 2 , Figure 4 As shown, the C-shaped bracket 120 is a frame composed of three plates, which is installed on the bottom plate 300, and the connecting plate 1110 is welded and connected to the C-shaped bracket 120. The first rotating rod 130 is rotatably installed on the C-shaped bracket 120, the electric push rod 140 is installed on the first rotating rod 130, and the clamping block 150 is connected to the output end of the electric push rod 140. The electric push rod 140 extends to drive the clamping block 150 to clamp on the cable drum 110. Specifically, the cable drum 110 is used to store cables and has an I-shaped wheel structure. The clamping slots are provided on both sides, and the clamping block 150 can be inserted into the clamping slots. Two clamping blocks 150 are provided to clamp on the cable drum 110 from both sides of the cable drum 110. Accordingly, two first rotating rods 130 and electric push rods 140 are provided.
[0038] The double-headed motor 160 is mounted on the connecting plate 1110, and the two output ends of the double-headed motor 160 are respectively connected to the two second rotating rods 170, the driving wheel 180 is mounted on the second rotating rod 170 and connected to the second rotating rod 170, and the driven wheel 190 is mounted on the first rotating rod 130 and connected to the first rotating rod 130. When releasing the cable, the double-headed motor 160 drives the second rotating rod 170 to rotate to drive the driving wheel 180 to rotate, and then the driving wheel 180 drives the driven wheel 190 to rotate to drive the first rotating rod 130 to rotate, and finally drives the cable drum 110 to rotate.
[0039] In this embodiment, the driving wheel 180 and the driven wheel 190 can be driven by belts, gears or chains, that is, the driving wheel 180 and the driven wheel 190 can be configured as pulleys, gears or sprockets. The pulleys can be configured as synchronous pulleys and equipped with corresponding synchronous belts, or can be driven by belts such as V-belts and flat belts, and the sprockets can be equipped with corresponding chains for transmission.
[0040] In this embodiment, the cleaning unit 200 further includes an arc plate 210, a cleaning brush 220, an opening and closing screw 230, a first slider 240, a second slider 250, a support frame 260 and a cleaning motor 270. Figure 2 , Figure 3 As shown, the opening and closing screw 230 is rotatably mounted on the support frame 260, and the cleaning motor 270 is mounted on the support frame 260 and connected to the opening and closing screw 230; the first slider 240 and the second slider 250 are slidably connected to the support frame 260; the two arc plates 210 are respectively connected to the first slider 240 and the second slider 250, and the first slider 240 and the second slider 250 are threadedly connected to the opening and closing screw 230; the opening and closing screw 230 is provided with a left-handed thread and a right-handed thread, and the first slider 240 is screwed with the left-handed thread, and the second slider 250 is screwed with the right-handed thread, that is, the first slider 240 is provided with a left-handed thread hole, and the second slider 250 is provided with a right-handed thread hole. The cleaning motor 270 drives the opening and closing screw 230 to rotate around its own axis to drive the first slider 240 and the second slider 250 to move toward or away from each other, thereby driving the two arc plates 210 to move to realize the opening and closing of the two cleaning brushes 220.
[0041] In this embodiment, in order to prevent the first slider 240 and the second slider 250 from rotating with the rotation of the opening and closing screw 230, a sliding groove can be provided on the support frame 260, and the sliding groove extends along the axis direction of the opening and closing screw 230. The first slider 240 and the second slider 250 are both engaged in the sliding groove and slide along the sliding groove, thereby limiting the first slider 240 and the second slider 250. In addition, one surface of the first slider 240 and the second slider 250 can also be abutted against the support frame 260 to limit their rotation around the axis of the opening and closing screw 230.
[0042] In this embodiment, a total of four wheels 400 are provided, which can be provided as four universal wheels or a combination of two fixed wheels and two universal wheels, and a handle is provided on the bottom plate 300 for easy pushing.
[0043] In this embodiment, the fixing unit 500 includes a fixing nail 510, a threaded rod 520, a threaded sleeve 530, a support plate 540, a slide cylinder 550 and a slide rod 560. Figure 7As shown. The threaded rod 520 is vertically arranged and rotatably mounted on the base plate 300. A knob is arranged at the upper end for easy rotation, and a step is arranged. The step abuts against the upper surface of the base plate 300 to limit and prevent the threaded rod 520 from moving downward. The threaded sleeve 530, the slide bar 560 and the fixing nail 510 are all installed on the support plate 540 to form a whole. The fixing nail 510 and the slide bar 560 are coaxially arranged to ensure stable force and are both provided with two. The threaded rod 520 is inserted into the threaded sleeve 530 and threadedly connected with the threaded sleeve 530. The slide cylinder 550 is installed on the base plate 300; one end of the slide bar 560 is connected to the support plate 540, and the other end is inserted into the slide cylinder 550 and slidably connected with the slide cylinder 550. The threaded rod 520 is rotated to rotate around its own axis to drive the threaded sleeve 530 to move, thereby driving the support plate 540, the slide bar 560 and the fixing nail 510 to move so that the fixing nail 510 is inserted into the ground to achieve the fixation of the base plate 300. The cooperation between the slide rod 560 and the slide cylinder 550 can prevent the threaded sleeve 530 and the support plate 540 from rotating with the threaded rod 520, resulting in no axial movement, and can prevent the support plate 540 from deforming due to uneven force on the two fixing nails 510.
[0044] In this embodiment, two fixing units 500 are provided, and the two fixing units 500 are provided on both sides of the conveying unit 100 to ensure stable fixation, that is, four fixing nails 510 are provided to ensure stable positioning.
[0045] The working process of the split underground power supply cable transmission structure provided in this embodiment is as follows:
[0046] After moving to the working position, first rotate the threaded rod 520 so that the threaded rod 520 drives the threaded sleeve 530 to move downward along its own axial direction, and then drives the fixing nail 510 to move downward, so that the fixing nail 510 is inserted into the ground to fix the base plate 300 and the conveying unit 100 and the cleaning unit 200, thereby ensuring the stability of the cable conveying process.
[0047] Then, the double-headed motor 160 is started to drive the second rotating rod 170, and then the first rotating rod 130 is driven to rotate through the transmission of the driving wheel 180 and the driven wheel 190, and then the electric push rod 140, the clamping block 150 and the cable drum 110 are driven to rotate in turn to release a section of cable. At this time, the cable is passed between the two cleaning brushes 220, and then the cleaning motor 270 is started, and the cleaning motor 270 drives the opening and closing screw 230 to rotate, and then drives the first slider 240 and the second slider 250 to move toward each other, so that the two arc plates 210 move toward each other, and finally the two cleaning brushes 220 are close to each other and clamp the cable, and then the double-headed motor 160 is continued to be turned on to release the cable. During the cable release process, the cleaning brush 220 can clean the surface of the cable.
[0048] When the cable drum 110 needs to be replaced, the cable drum 110 can be lifted by a lifting tool to offset its own weight, and then the electric push rod 140 is retracted to drive the clamping block 150 out of the cable drum 110. Then the cable drum 110 is lifted away and a new cable drum 110 is hoisted in place, and the clamping block 150 is clamped into the cable drum 110 by extending the electric push rod 140 to complete the replacement. Furthermore, a lifting unit can be provided, and the lifting unit is installed on the base plate 300, and the conveying unit 100 is installed on the lifting unit. When the cable reel 110 is replaced, the lifting unit can drive the conveying unit 100 to descend, so that the outer circle of the cable reel 110 abuts against the base plate 300, so that the base plate 300 supports the weight of the cable reel 110, and then the block 150 is driven by the electric push rod 140 to break away from the cable reel 110, and the conveying unit 100 is driven to rise and fall by the lifting unit, so that the base plate 300 supports the weight of the cable reel 110, which can avoid excessive lifting of the cable reel 110 due to inaccurate lifting, thereby causing damage to the first rotating rod 130, the electric push rod 140, etc.
[0049] Specifically, the structure of the lifting unit can adopt a screw lifting method, that is, the lifting unit includes a lifting plate, a lifting screw and a guide rod, the conveying unit 100 is installed on the lifting plate, four guide rods are installed on the bottom plate 300 and inserted on the lifting plate, the four guide rods are arranged in a rectangular shape and are slidably connected to the lifting plate, the lifting screw lever is parallel to the guide rod and is rotatably installed on the bottom plate 300, and the lifting plate is installed with a corresponding nut to cooperate with the lifting screw. When lifting is required, rotating the lifting screw can drive the lifting plate to move, and then drive the conveying unit 100 to move upward.
[0050] In this embodiment, the fixing nail 510 is inserted into the ground to prevent the bottom plate 300 from moving and affecting the stability of the cable during transportation. The transportation unit 100 transports the cable and facilitates the replacement of the cable drum 110, which reduces the intensity of the worker pulling the cable and improves the transportation efficiency of the cable.
[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A split underground power supply cable transmission structure, characterized in that: It comprises a conveying unit (100) and a cleaning unit (200); The conveying unit (100) comprises a cable drum (110), and the cable drum (110) can rotate around its own axis to release the cable; The cleaning unit (200) comprises an arc-shaped plate (210) and a cleaning brush (220), wherein the cleaning brush (220) is mounted on the arc-shaped plate (210), and the two arc-shaped plates (210) can move towards each other to drive the cleaning brush (220) to clamp the cable, and the cleaning brush (220) is used to clean the surface of the cable.
2. The split downhole power supply cable transmission structure according to claim 1 is characterized in that: The cleaning unit (200) further comprises an opening and closing screw (230), a first slider (240) and a second slider (250); The two arc-shaped plates (210) are respectively connected to the first slider (240) and the second slider (250); the first slider (240) and the second slider (250) are threadedly connected to the opening and closing screw (230); The opening and closing screw rod (230) is provided with a left-handed thread and a right-handed thread, the first slider (240) is screwed with the left-handed thread, and the second slider (250) is screwed with the right-handed thread.
3. The split downhole power supply cable transmission structure according to claim 2 is characterized in that: The cleaning unit (200) further comprises a support frame (260), and the opening and closing screw (230) is rotatably mounted on the support frame (260); The first sliding block (240) and the second sliding block (250) are both in contact with the support frame (260) and are slidably connected to the support frame (260).
4. The split downhole power supply cable transmission structure according to claim 3 is characterized in that: The cleaning unit (200) further comprises a cleaning motor (270), wherein the cleaning motor (270) is connected to the opening and closing screw (230) and is used to drive the opening and closing screw (230) to rotate around its own axis.
5. The split downhole power supply cable transmission structure according to claim 1 is characterized in that: The conveying unit (100) further comprises a C-shaped bracket (120), a first rotating rod (130), an electric push rod (140) and a clamping block (150), wherein the first rotating rod (130) is rotatably mounted on the C-shaped bracket (120), the electric push rod (140) is mounted on the first rotating rod (130), and the clamping block (150) is connected to an output end of the electric push rod (140); The electric push rod (140) extends to drive the clamping block (150) to clamp onto the cable drum (110).
6. The split downhole power supply cable transmission structure according to claim 5 is characterized in that: The conveying unit (100) further comprises a double-headed motor (160), a second rotating rod (170), a driving wheel (180) and a driven wheel (190); The output end of the double-headed motor (160) is connected to the second rotating rod (170), the driving wheel (180) is sleeved on the second rotating rod (170) and connected to the second rotating rod (170), and the driven wheel (190) is sleeved on the first rotating rod (130) and connected to the first rotating rod (130); The double-headed motor (160) drives the second rotating rod (170) to rotate so as to drive the driving wheel (180) to rotate, and then the driving wheel (180) drives the driven wheel (190) to rotate so as to drive the first rotating rod (130) to rotate.
7. The split downhole power supply cable transmission structure according to claim 1 is characterized in that: It also includes a bottom plate (300) and wheels (400); the wheels (400) are mounted on the bottom plate (300), and the conveying unit (100) and the cleaning unit (200) are mounted on the bottom plate (300).
8. The split downhole power supply cable transmission structure according to claim 7 is characterized in that: It also includes a fixing unit (500), wherein the fixing unit (500) includes a fixing nail (510), wherein the fixing nail (510) is slidably mounted on the bottom plate (300) and can move along its own axis to be inserted into the ground.
9. The split downhole power supply cable transmission structure according to claim 8, characterized in that: The fixing unit (500) further comprises a support plate (540), a slide cylinder (550) and a slide rod (560); The slide cylinder (550) is installed on the bottom plate (300), the slide rod (560) and the fixing nail (510) are both installed on the support plate (540), and the slide rod (560) is inserted into the slide cylinder (550) and is slidably connected to the slide cylinder (550); The support plate (540) moves along the axial direction of the fixing nail (510) to drive the fixing nail (510) to be inserted into the ground.
10. The split downhole power supply cable transmission structure according to claim 9, characterized in that: The fixing unit (500) further comprises a threaded rod (520) and a threaded sleeve (530); The threaded rod (520) is rotatably mounted on the bottom plate (300), and the threaded sleeve (530) is mounted on the support plate (540); The threaded rod (520) is inserted into the threaded sleeve (530) and threadedly connected to the threaded sleeve (530); The threaded rod (520) rotates around its own axis to drive the threaded sleeve (530) to move, thereby driving the support plate (540), the sliding rod (560) and the fixing nail (510) to move so that the fixing nail (510) is inserted into the ground.
Citation Information
Patent Citations
Pneumatic cable conveying device for underground coal mine
CN212101347U