CN209786651U - A closing device and cable tractor for cable tractor - Google Patents
A closing device and cable tractor for cable tractor Download PDFInfo
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- CN209786651U CN209786651U CN201920783812.6U CN201920783812U CN209786651U CN 209786651 U CN209786651 U CN 209786651U CN 201920783812 U CN201920783812 U CN 201920783812U CN 209786651 U CN209786651 U CN 209786651U
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Abstract
The utility model discloses a closing device and cable tractor for cable tractor, this closing device include the upper junction plate, compress tightly a mounting bracket and locate the upper junction plate and compress tightly the scissors crane between the mounting bracket, compress tightly and install the piece that compresses tightly that is used for compressing tightly the cable on the mounting bracket, the scissors crane sets up the adjustable mechanism of cross support form to set up hand mechanism, do not need other appurtenance can realize adjusting to compress tightly the piece and reciprocate and compress tightly the cable, it is convenient to adjust. The adjusting screw of the hand-operated mechanism penetrates through the front adjusting rod and the rear adjusting rod, and the adjusting screw is matched with the screw holes in the front adjusting rod and the rear adjusting rod in opposite rotating directions through the two half thread sections, so that the hand-operated mechanism is flexible and easy to adjust, can quickly adjust and compress a cable, and can quickly relieve the compression state of the cable.
Description
Technical Field
The utility model relates to a cable machine technical field, concretely relates to closing device and cable tractor for cable tractor.
Background
The cable tractor is special equipment for drawing cables, is particularly suitable for occasions such as cable arrangement pipes, cable tunnel penetration, cable straightening, long-distance conveying and the like, reduces labor intensity and improves construction quality.
The cable tractor generally includes through motor drive's conveyor belt, is equipped with the pinch roller on conveyor belt, according to the thickness of the cable of carrying, adjusts the pinch roller and reciprocates to push down the cable, behind the starter motor, can be through the conduction effect of conveyor belt and pinch roller with the cable conveying forward.
Chinese patent publication No. CN207719737U describes a cable tractor with adjustable transmission gap, which includes a frame, a power device installed on the frame, and a lower transmission assembly and an upper transmission assembly for placing a cable to extrude the cable and applying a pulling force or a pushing force, wherein the frame is provided with a lower bracket and an upper bracket for installing the lower transmission assembly and the upper transmission assembly, respectively, and the upper bracket is provided with a height adjusting member for driving the upper transmission assembly to move up and down, so as to adjust the gap between the lower transmission assembly and the upper transmission assembly.
The height adjusting component of the cable tractor comprises a vertical stud installed on a rack, a clamping plate is connected to the bottom end of the stud, and the clamping plate is driven to move up and down through adjusting the stud to further drive an upper transmission assembly to move up and down, so that a cable is compressed. This way of regulation has the following disadvantages: firstly, the adjustment is inconvenient, and the stud needs to be screwed, and special tools such as a spanner need to be used for adjustment, so that a matched spanner needs to be carried during actual construction; secondly, the bolt can not be flexibly adjusted, and because the two sides of the bolt are provided with the anti-loosening springs, the springs always apply downward pressure to the upper transmission assembly, so that the adjustment is very laborious.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a closing device and cable tractor for cable tractor solves among the prior art inconvenient technical problem of interval adjustment between cable tractor's conveyor belt and the pinch roller.
in order to solve the above technical problem, the first aspect of the present invention is:
The utility model provides a closing device for cable tractor, includes support, upper junction plate, compresses tightly a mounting bracket to and the scissors crane, the support includes the stand, locates the backup pad on stand top, the upper junction plate is installed the backup pad below, install on the top of scissors crane the lower surface of upper junction plate, it installs to compress tightly a mounting bracket fixed mounting in the bottom of scissors crane it compresses tightly the piece to be used for compressing tightly the cable to compress tightly to install on the mounting bracket.
Preferably, the pressing piece mounting frame comprises a left side plate and a right side plate, and the pressing pieces are a plurality of pressing wheels which are installed between the left side plate and the right side plate and can freely rotate, or rubber tracks which are installed between the left side plate and the right side plate and can freely rotate.
preferably, the stand includes the outer sleeve of lower part and the inner sleeve on upper portion, the inner sleeve with all be equipped with a plurality of screw on the outer sleeve, the inner sleeve with pass through stay bolt connection between the outer sleeve.
Preferably, the scissors lifting frame comprises a front adjusting rod, a rear adjusting rod, an upper rotating shaft and a lower rotating shaft which are parallel, the upper rotating shaft and the lower rotating shaft are vertically arranged along a central axis between the front adjusting rod and the rear adjusting rod, the upper rotating shaft is positioned above a plane between the front adjusting rod and the rear adjusting rod, and the lower rotating shaft is positioned below the plane between the front adjusting rod and the rear adjusting rod; the two ends of the upper rotating shaft and the lower rotating shaft are respectively provided with a cross bracket, each cross bracket comprises two connecting rods which are hinged with each other, and the cross point of each cross bracket is correspondingly hinged with the end part of the upper rotating shaft or the lower rotating shaft; the end parts of the corresponding connecting rods between the upper and lower adjacent crossed brackets are hinged to the end parts of the front adjusting rod or the rear adjusting rod; two upper long holes extending in the front-back direction are correspondingly formed in two sides of the upper connecting plate, the connecting rod end parts corresponding to the crossed supports at the two ends of the upper rotating shaft are hinged in the upper long holes, and the other connecting rod end parts of the crossed supports at the two ends of the upper rotating shaft are hinged at corresponding positions on two sides of the upper connecting plate; the two sides of the pressing piece mounting frame are provided with lower long holes extending along the front-back direction, the lower long holes are correspondingly arranged on the left side plate and the right side plate, the end parts of connecting rods corresponding to the crossed supports at the two ends of the lower rotating shaft are hinged in the lower long holes, and the other end parts of the connecting rods of the crossed supports at the two ends of the lower rotating shaft are hinged at corresponding positions on the two sides of the pressing piece mounting frame; adjusting screw is worn to be equipped with between preceding regulation pole, the back regulation pole, adjusting screw's first half and latter half are equipped with the opposite screw thread of direction of rotation respectively, preceding regulation pole is equipped with corresponding screw with the back regulation pole on, hand mechanism is installed to adjusting screw's one end.
preferably, the upper connecting plate comprises side plate parts at two sides, and a lower opening groove for accommodating the upper rotating shaft is formed in the lower surface of the side plate part; the upper surfaces of the left side plate and the right side plate in the pressing piece mounting frame are provided with upper open grooves used for containing the lower rotating shaft.
Preferably, the hand-operated mechanism comprises a rotating rod, the middle part of the rotating rod is fixed at the end part of the adjusting screw rod, and the two ends of the rotating rod are provided with holding parts.
Preferably, a plurality of elastic cushion blocks are arranged between the upper connecting plate and the supporting plate.
The second aspect of the utility model is:
The design provides a cable traction machine, which comprises a frame, install power device, drive mechanism, cable feeding subassembly on the frame, power device passes through the drive mechanism drive cable feeding subassembly still includes the utility model discloses an arbitrary item of first aspect a closing device for cable traction machine, closing device installs in the frame, closing device's compressing tightly one face towards cable feeding subassembly.
Preferably, the cable conveying assembly is a plurality of linked and juxtaposed rollers or rubber tracks.
Preferably, the power device is an engine or an electric motor; the transmission mechanism is a gearbox.
The utility model has the advantages of:
1. The utility model provides a closing device for cable tractor sets up the adjustable mechanism of cross-bracing frame form to set up hand mechanism, do not need other appurtenance can realize adjusting and compress tightly a downstream cable that compresses tightly, it is convenient to adjust.
2. The adjusting screw of the hand-operated mechanism penetrates through the front adjusting rod and the rear adjusting rod, and the adjusting screw is matched with the screw holes in the front adjusting rod and the rear adjusting rod in opposite rotating directions through the two half thread sections, so that the hand-operated mechanism is flexible and easy to adjust, can quickly adjust and compress a cable, and can quickly relieve the compression state of the cable.
Drawings
Fig. 1 is a front view of a pressing device for a cable traction machine according to embodiment 1 of the present invention;
fig. 2 is a schematic perspective view of a pressing device for a cable tractor according to embodiment 1 of the present invention;
Fig. 3 is a schematic perspective view of a pressing device for a cable tractor according to embodiment 1 of the present invention at another viewing angle;
Fig. 4 is a schematic structural view of an adjusting screw of a pressing device for a cable tractor according to embodiment 1 of the present invention;
Fig. 5 is a schematic perspective view of a cable tractor according to embodiment 2 of the present invention.
In the drawings, each reference numeral means: the upper connecting plate 10, the upper long hole 11, the lower open groove 12, the pressing piece mounting frame 20, the pressing wheel 21, the left side plate 22, the right side plate 23, the lower long hole 24, the upper open groove 25, the scissors lifting frame 30, the front adjusting rod 301, the rear adjusting rod 302, the upper rotating shaft 303, the lower rotating shaft 304, the first connecting rod 3051, the second connecting rod 3052, the third connecting rod 3053, the fourth connecting rod 3064, the first articulated shaft 3061, the second articulated shaft 3062, the third articulated shaft 3063, the fourth articulated shaft 3064, the adjusting screw 40, the rotating rod 41, the holding part 42, the upright post 51, the outer sleeve 511, the gear box 512, the supporting bolt 513, the supporting plate 52, the cylindrical rubber gasket 521, the bolt 522, the rack 61, the motor 62, the gear box 63, the rubber crawler 64 and the pressing.
Detailed Description
The following embodiments are only intended to illustrate the present invention in detail, and do not limit the scope of the present invention in any way.
in the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Example 1:
A hold-down device for a cable pulling machine, please refer to fig. 1 to 4.
As shown in fig. 1 to 3, the embodiment of the utility model provides a closing device for cable traction machine includes upper junction plate 10, compresses tightly a mounting bracket 20 and locates upper junction plate 10 and the scissors crane 30 that compresses tightly between a mounting bracket 20, compresses tightly and installs the piece that compresses tightly that is used for compressing tightly the cable on the mounting bracket 20, and in this embodiment, this piece that compresses tightly is 5 pinch rollers 21 that set up side by side, and pinch roller 21 is the V-arrangement wheel of middle part indent to in order to compress tightly the cable.
the scissors crane 30 comprises a front adjusting rod 301, a rear adjusting rod 302, an upper rotating shaft 303 and a lower rotating shaft 304 which are parallel, the upper rotating shaft 303 and the lower rotating shaft 304 are arranged up and down along a central axis between the front adjusting rod 301 and the rear adjusting rod 302, the upper rotating shaft 303 is positioned above a plane where the front adjusting rod 301 and the rear adjusting rod 302 are located, and the lower rotating shaft 304 is positioned below the plane where the front adjusting rod 301 and the rear adjusting rod 302 are located.
The two ends of the upper rotating shaft 303 and the lower rotating shaft 304 are respectively provided with a cross support, the cross supports are four groups in total, each group of cross supports comprises two connecting rods which are hinged with each other, the cross point of each group of cross supports is correspondingly hinged with the end part of the upper rotating shaft 303 or the lower rotating shaft 304, and thus, the two connecting rods in each group of cross supports can rotate at the end part of the upper rotating shaft 303 or the lower rotating shaft 304 to change the crossing angle of the two connecting rods.
The two groups of cross supports on the inner side and the outer side of the pressing device are connected with the front adjusting rod 301, the rear adjusting rod 302, the upper rotating shaft 303 and the lower rotating shaft 304 in the same way, taking the two groups of cross supports on the outer side as an example, as shown in fig. 2, the cross supports arranged at the outer end of the upper rotating shaft 303 comprise a first connecting rod 3051 and a second connecting rod 3052 which are the same in length, and the middle parts of the first connecting rod 3051 and the second connecting rod 3052 are hinged at the outer end of the upper rotating shaft 303; the cross bracket installed at the outer end of the lower rotating shaft 304 comprises a third connecting rod 3053 and a fourth connecting rod 3054 which are the same in length, and the middle parts of the third connecting rod 3053 and the fourth connecting rod 3054 are hinged at the outer end of the lower rotating shaft 304.
The end parts of the connecting rods corresponding to the upper and lower adjacent cross supports are hinged to the end parts of the front adjusting rod 301 or the rear adjusting rod 302, for example, the lower end of the first connecting rod 3051 is hinged to the outer end of the front adjusting rod 301, the upper end of the third connecting rod 3053 is hinged to the outer end of the front adjusting rod 301, the lower end of the second connecting rod 3052 is hinged to the outer end of the rear adjusting rod 302, and the upper end of the fourth connecting rod 3054 is hinged to the outer end of the rear adjusting rod 302.
Two upper portion slot holes 11 extending along the front and rear direction are correspondingly formed at both sides of the upper connecting plate 10, the connecting rod end portions corresponding to the cross supports at both ends of the upper rotating shaft 303 are hinged in the upper portion slot holes 11, and the remaining connecting rod end portions of the cross supports at both ends of the upper rotating shaft 303 are hinged at the corresponding positions at both sides of the upper connecting plate 10, for example, the upper end of the second connecting rod 3052 is hinged in the upper portion slot hole 11 at the outer side through a first hinge shaft 3061, and the upper end of the first connecting rod 3051 is hinged at the rear portion of the upper connecting plate 10. The first hinge shaft 3061 is movable along the upper long hole 11 at the outer side, thereby enabling the change of the angle between the first link 3051 and the second link 3052.
The both sides of compressing tightly a mounting bracket 20 are equipped with along the lower part slot hole 24 of fore-and-aft direction extension, and in this embodiment, compress tightly a mounting bracket 20 and include left side board 22 and right side board 23, and lower part slot hole 24 corresponds respectively and locates on left side board 22 and the right side board 23. The end portions of the links corresponding to the cross brackets at both ends of the lower rotary shaft 304 are hinged in the lower long hole 24, and the other end portions of the links corresponding to the cross brackets at both ends of the lower rotary shaft 304 are hinged in the corresponding portions at both sides of the pressing member mounting frame, for example, the lower end of the fourth link 3054 is hinged in the lower long hole 24 at the outer side by the third hinge shaft 3063, and the lower end of the third link 3053 is hinged in the rear end of the right side plate 23 by the fourth hinge shaft 3064. The third hinge shaft 3063 is movable along the outer lower elongated hole 24, thereby enabling a change in the angle between the third link 3053 and the fourth link 3054.
An adjusting screw 40 penetrates between the front adjusting rod 301 and the rear adjusting rod 302, as shown in fig. 4, the front half part and the rear half part of the adjusting screw 40 are respectively provided with screw thread sections with opposite rotation directions, the front adjusting rod 301 and the rear adjusting rod 302 are provided with corresponding screw holes, the screw thread sections of the front adjusting rod 301 and the rear adjusting rod 302 are respectively screwed into the screw holes of the front adjusting rod 301 and the rear adjusting rod 302, a hand-operated mechanism is installed at the front end of the adjusting screw 40, the middle part of the rotating rod 41 is fixed at the front end of the adjusting screw 40, the two ends of the rotating rod 41 are respectively provided with a holding part 42, the holding parts 42 are respectively held by two hands, the adjusting screw 40 can be rotated, so that the distance between the front adjusting rod 301 and the rear adjusting rod 302 is adjusted, and the distance between the upper rotating shaft 303 and.
Further, this closing device still includes the support, and the support includes two stands 51 and locates the backup pad 52 on stand 51 top, and the rear side of backup pad 52 is buckled downwards, and the bottom surface and the kink of backup pad 52 weld at two stands 51 tops. The upper connecting plate 10 is mounted below the support plate 52, a plurality of elastic cushion blocks are arranged between the upper connecting plate 10 and the support plate 52, the elastic cushion blocks are cylindrical rubber pads 521, and the upper connecting plate 10 is fixed below the support plate 52 through bolts 522 penetrating through the cylindrical rubber pads 521, so that a damping effect is achieved.
the column 51 is height-adjustable, the column 51 comprises an outer sleeve 511 at the lower part and an inner sleeve 512 at the upper part, a plurality of screw holes are arranged on both the outer sleeve 511 and the inner sleeve 512, the inner sleeve 512 and the outer sleeve 511 are connected through a supporting bolt 513, the depth of the inner sleeve 512 inserted into the outer sleeve 511 is adjusted to enable different screw holes between the outer sleeve 511 and the inner sleeve 512 to be overlapped, and the supporting bolt 513 is inserted to realize the height adjustment of the column 51.
Further, the upper junction plate 10 includes the side plate portion of both sides, is equipped with the under shed 12 that is used for holding last pivot 303 at the side plate portion lower surface, and the upper surface that compresses tightly left side board 22 and right side board 23 in a mounting bracket 20 is equipped with the last open slot 25 that is used for holding lower pivot 304, and when adjusting pole 301 and back regulation pole 302 and adjusting the maximum distance before, last pivot 303 is located under shed 12, and lower pivot 304 is located in last open slot 25 to realize the regulation of maximum height scope.
Example 2:
A cable hauling machine, please refer to fig. 5.
As shown in fig. 5, the embodiment of the utility model provides a cable traction machine includes frame 61, install power device in frame 61, drive mechanism, cable transport assembly, power device passes through drive mechanism drive cable transport assembly, in this embodiment, power device is motor 62, drive mechanism is gearbox 63, cable transport assembly is rubber track 64, the inside chain that is of rubber track 64, rubber track 64's both ends are equipped with the sprocket of installing in frame 61, rubber track 64 cover is established at the sprocket, motor 62 is connected with gearbox 63 drive, gearbox 63 is connected with one of them sprocket drive, it can drive rubber track 64 and rotate to open motor 62, rubber track 64 has great frictional force to the cable. In other embodiments, the cable transportation assembly may be a plurality of linked and juxtaposed rollers, and a chain transmission mechanism may be provided between adjacent rollers to link the rollers to each other.
the cable traction machine further comprises a pressing device 65 in embodiment 1, two upright posts of the pressing device 65 are mounted on the frame 61, and a pressing wheel of the pressing device 65 faces the rubber track 64. During the use, drive the pinch roller rebound through hand mechanism earlier, make have enough big interval between pinch roller and the rubber track 64, place the cable between pinch roller and rubber track 64, then drive the pinch roller rebound through hand mechanism, make the cable compress tightly between pinch roller and rubber track 64, starter motor 62, the cable can be between pinch roller and rubber track 64 to one side conveying.
The present invention has been described in detail with reference to the accompanying drawings and embodiments, but those skilled in the art will understand that various specific parameters in the above embodiments can be changed without departing from the spirit of the present invention to form a plurality of specific embodiments, which are the common variation ranges of the present invention and will not be described in detail herein.
Claims (10)
1. the utility model provides a closing device for cable tractor, its characterized in that includes support, upper junction plate, compresses tightly a mounting bracket to and the scissors crane, the support includes the stand, locates the backup pad on stand top, the upper junction plate is installed the backup pad below, install on the top of scissors crane the lower surface of upper junction plate, compress tightly an mounting bracket fixed mounting and be in the bottom of scissors crane compress tightly and install the piece that compresses tightly that is used for compression cable on the mounting bracket.
2. The compression device for a cable pulling machine of claim 1, wherein the compression member mounting bracket includes a left side plate and a right side plate, and the compression members are a plurality of freely rotatable compression rollers mounted between the left side plate and the right side plate or a freely rotatable rubber track mounted between the left side plate and the right side plate.
3. The compression device for a cable pulling machine as claimed in claim 1, wherein the column includes a lower outer sleeve and an upper inner sleeve, the inner sleeve and the outer sleeve are provided with a plurality of screw holes, and the inner sleeve and the outer sleeve are connected by a support bolt.
4. pressing device for cable pulling machines according to claim 2,
The scissors lifting frame comprises a front adjusting rod, a rear adjusting rod, an upper rotating shaft and a lower rotating shaft which are parallel, the upper rotating shaft and the lower rotating shaft are vertically arranged along a central axis between the front adjusting rod and the rear adjusting rod, the upper rotating shaft is positioned above a plane between the front adjusting rod and the rear adjusting rod, and the lower rotating shaft is positioned below the plane between the front adjusting rod and the rear adjusting rod;
the two ends of the upper rotating shaft and the lower rotating shaft are respectively provided with a cross bracket, each cross bracket comprises two connecting rods which are hinged with each other, and the cross point of each cross bracket is correspondingly hinged with the end part of the upper rotating shaft or the lower rotating shaft;
the end parts of the corresponding connecting rods between the upper and lower adjacent crossed brackets are hinged to the end parts of the front adjusting rod or the rear adjusting rod;
two upper long holes extending in the front-back direction are correspondingly formed in two sides of the upper connecting plate, the connecting rod end parts corresponding to the crossed supports at the two ends of the upper rotating shaft are hinged in the upper long holes, and the other connecting rod end parts of the crossed supports at the two ends of the upper rotating shaft are hinged at corresponding positions on two sides of the upper connecting plate;
The two sides of the pressing piece mounting frame are provided with lower long holes extending along the front-back direction, the lower long holes are correspondingly arranged on the left side plate and the right side plate, the end parts of connecting rods corresponding to the crossed supports at the two ends of the lower rotating shaft are hinged in the lower long holes, and the other end parts of the connecting rods of the crossed supports at the two ends of the lower rotating shaft are hinged at corresponding positions on the two sides of the pressing piece mounting frame;
Adjusting screw is worn to be equipped with between preceding regulation pole, the back regulation pole, adjusting screw's first half and latter half are equipped with the opposite screw thread of direction of rotation respectively, preceding regulation pole is equipped with corresponding screw with the back regulation pole on, hand mechanism is installed to adjusting screw's one end.
5. The compression device for cable pulling machine according to claim 4, wherein the upper connecting plate includes two side plate portions, and a lower opening groove for receiving the upper rotating shaft is provided on a lower surface of the side plate portions; the upper surfaces of the left side plate and the right side plate in the pressing piece mounting frame are provided with upper open grooves used for containing the lower rotating shaft.
6. The pressing device for the cable traction machine according to claim 4, wherein the hand-operated mechanism comprises a rotating rod, the middle part of the rotating rod is fixed at the end part of the adjusting screw rod, and two ends of the rotating rod are provided with holding parts.
7. The hold-down device for cable tractors as claimed in claim 1, characterized in that a plurality of spring pads are provided between the upper connecting plate and the support plate.
8. a cable traction machine comprising a frame on which a power unit, a transmission mechanism, a cable transport assembly are mounted, the power unit driving the cable transport assembly through the transmission mechanism, characterized by further comprising a hold-down device for a cable traction machine according to any one of claims 1 to 7, the hold-down device being mounted on the frame, a hold-down member of the hold-down device facing the cable transport assembly.
9. the cable pulling machine as defined in claim 8, wherein the cable feeding assembly is a plurality of linked and juxtaposed rollers or rubber tracks.
10. The cable pulling machine of claim 8, wherein the power plant is an engine or an electric motor; the transmission mechanism is a gearbox.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920783812.6U CN209786651U (en) | 2019-05-28 | 2019-05-28 | A closing device and cable tractor for cable tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920783812.6U CN209786651U (en) | 2019-05-28 | 2019-05-28 | A closing device and cable tractor for cable tractor |
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| Publication Number | Publication Date |
|---|---|
| CN209786651U true CN209786651U (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920783812.6U Active CN209786651U (en) | 2019-05-28 | 2019-05-28 | A closing device and cable tractor for cable tractor |
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| Country | Link |
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| CN (1) | CN209786651U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042472A (en) * | 2021-03-18 | 2021-06-29 | 郝张虎 | Pipeline cleaning system and method for water drainage pipe for water conservancy irrigation |
-
2019
- 2019-05-28 CN CN201920783812.6U patent/CN209786651U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042472A (en) * | 2021-03-18 | 2021-06-29 | 郝张虎 | Pipeline cleaning system and method for water drainage pipe for water conservancy irrigation |
| CN113042472B (en) * | 2021-03-18 | 2022-01-28 | 张新贵 | Pipeline cleaning system of drain pipe for irrigation |
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