Pipeline abrasion prevention pulley device for drainage ditch

Abstract

The embodiment of the utility model provides a pipeline abrasion prevention pulley device for a drainage ditch. The pipeline abrasion prevention pulley device comprises a supporting frame; the fixed roller and the guide double reverse conical roller are installed on the inner side of the supporting frame through fastening bolts, and the fixed roller is located over the guide double reverse conical roller; one end of a roller shaft of the movable roller is hinged to one side of the supporting frame, the other end of the roller shaft of the movable roller is detachably installed on the other side of the supporting frame, and the movable roller is located right in front of the guiding double-reverse-cone-shaped roller; the pressing mechanism is installed on the back face of the back plate, the height of the pressing mechanism can be adjusted, and the drainage ditch cover plate can be pressed and fixed; and the two side supporting assemblies are arranged on the two sides of the supporting frame correspondingly, the width can be adjusted, and the side walls of the drainage ditch can be supported. The high-pressure water pipe can be stabilized, guided and supported in the flushing operation process when the high-pressure water pipe moves forwards and backwards in the horizontal direction along the drainage ditch, the fastening and stabilizing effect is good, dismounting and mounting are convenient, and the device is suitable for the technical field of railway maintenance machinery.

Description

Technical Field

[0001] This application relates to the field of railway maintenance machinery technology, specifically to a pulley device for preventing pipe abrasion in drainage ditches. Background Technology

[0002] The purpose of the railway tunnel drainage ditch dredging and clearing vehicle is to clean and clear drainage ditches, manholes, culverts, dewatering wells, and other tunnel drainage facilities, remove silt, collect it, and unload it at a different location. This prevents track bed defects such as mud pumping and siltation caused by silt blockage in the drainage ditches, ensuring the safety of train operation.

[0003] High-pressure cleaning and unblocking involves a power unit that uses a high-pressure pump to convert ordinary water pressure into high-pressure water. This high-pressure water then travels through a high-pressure pipeline to a control device, where a high-pressure nozzle converts the water into a high-pressure water jet to wash the surface of an object. When the impact force of the water exceeds the adhesion between the dirt and the object's surface, the high-pressure water jet will peel off and wash away the dirt. When unblocking and cleaning underground drains, an extended hose and a pipe flushing nozzle can be used. The drill bit is inserted deep into the clogged sludge to create space in the middle of the blockage. The nozzle sprays forward to remove hardened blockages, and as the nozzle moves forward, it flushes the blockages backward.

[0004] Because the high-pressure water pipe falls vertically from a height, it moves horizontally forward and backward along the drainage ditch during the operation to perform flushing work. During the operation, due to the dynamic changes in water pressure and the forward and backward movement, it is difficult to guide the water pipe smoothly, which can easily cause the water pipe to run wildly and scrape and abrade the surface of the water pipe against the sides of the drainage ditch.

[0005] Currently, we purchase wire-laying pulleys for electrical equipment, but we lack a supporting and stabilizing mechanism to support the sidewalls of drainage ditches. We can only hold the wire-laying pulleys in place by pressing them down with heavy objects, which makes them very easy to slip during use and difficult to meet the needs of high-pressure water pipes.

[0006] Therefore, it is necessary to design and develop a pulley device for drainage ditches to prevent pipe abrasion, so as to provide stability and guidance support for high-pressure water pipes during horizontal forward and backward flushing operations along the drainage ditch. Utility Model Content

[0007] To address one of the aforementioned technical deficiencies, this application provides a device for preventing pipe abrasion on pulleys in drainage ditches, comprising:

[0008] The support frame includes a back panel and two side panels. The two side panels are perpendicularly connected to the front of the back panel and are parallel to each other and spaced apart.

[0009] The fixed roller and the guide double-conical roller are respectively installed on the inner side of the two side plates by fastening bolts, and the fixed roller is located directly above the guide double-conical roller;

[0010] The movable roller has one end of its roller shaft hinged to the side plate and the other end of its roller shaft detachably mounted on the other side plate, and the movable roller is located directly in front of the guide double reverse conical roller;

[0011] The clamping mechanism, installed on the back of the back panel, can clamp and fix the drain cover.

[0012] Preferably, the anti-pipe abrasion pulley device for drainage ditches further includes two side support assemblies, respectively installed on the outer side of the two side plates, each side support assembly including:

[0013] The connecting plate is installed on the side plate by fastening bolts, and a hinged support is provided at its bottom;

[0014] Side support plate, on which two hinged supports are provided at intervals;

[0015] The first side support connecting rod has one end hinged to the hinge support of the connecting plate, and the other end hinged to the hinge support of the side support plate located below.

[0016] The side support adjustment mechanism is installed on the upper part of the connecting plate, and the output end of the side support adjustment mechanism can perform vertical lifting and lowering movements.

[0017] The second side support connecting rod is hinged at one end to the hinged support located above the side support plate, and at the other end to the output end of the side support adjustment mechanism.

[0018] Preferably, the side support adjustment mechanism includes:

[0019] The vertically arranged side support screw has a connecting plate with a guide sleeve, a mounting base, and a hinge support arranged sequentially from top to bottom. The top of the side support screw is connected to a rotating handle, and the bottom of the side support screw passes through the guide sleeve and is rotatably connected to the mounting base.

[0020] The nut is threaded onto the side support rod, and the outer side of the nut is hinged to the other end of the second side support connecting rod.

[0021] Preferably, the clamping mechanism includes:

[0022] The lower fixing plate is horizontally installed in the middle of the back of the back panel;

[0023] The upper fixing plate is horizontally installed on the upper part of the back of the back panel;

[0024] The clamping screw has a rotating handle connected to its top end, and its bottom end passes through the upper fixed plate and is connected to a horizontally set clamping adjustment plate. The clamping screw is threadedly connected to the upper fixed plate.

[0025] Preferably, the clamping mechanism further includes:

[0026] The limit nut is threadedly connected to the clamping screw and is located between the upper fixed plate and the rotating handle.

[0027] Preferably, each of the two side plates is provided with a hinge support. One end of the movable roller shaft is hinged to the hinge support on one side by a pin. The movable roller shaft can be rotated outward horizontally around the pin to open. The other end of the movable roller shaft is pluggably connected to the hinge support on the other side by a spring pin.

[0028] Preferably, the side brace assembly can be disassembled by loosening the fastening bolts between the connecting plate and the side plate. After disassembling the side brace assembly, it can be replaced with a fixed wing plate, which is installed on the side plate by fastening bolts.

[0029] Preferably, the side of the side support plate away from the side plate has an uneven surface.

[0030] The anti-pipe abrasion pulley device for drainage ditches provided in this application embodiment uses a clamping mechanism to clamp and fix the drainage ditch cover plate, and a side support assembly to adjust the lateral position of the side support plate, thereby completing the support and fixation of the ditch sidewall. The clamping mechanism and the side support assembly work together to fix the device to the drainage ditch. By setting fixed rollers, guide double conical rollers and movable rollers, the device provides stability and guidance support for the high-pressure water pipe during the horizontal forward and backward flushing operation along the drainage ditch. This avoids the phenomenon that the water pipe is difficult to guide smoothly due to dynamic changes in water pressure and forward and backward movement, causing the water pipe to run around and scrape and abrade the surface of the water pipe against the sides of the drainage ditch.

[0031] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by way of what is pointed out in the written description, claims, and drawings. Attached Figure Description

[0032] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0033] Figure 1 This is a front structural schematic diagram of the anti-pipe abrasion pulley device for drainage ditches provided in the embodiments of this application;

[0034] Figure 2 This is a schematic diagram of the rear structure of the anti-pipe abrasion pulley device for drainage ditches provided in the embodiments of this application;

[0035] Figure 3 A schematic diagram of replaceable components for a pulley device for preventing pipe abrasion in drainage ditches provided in an embodiment of this application;

[0036] Figure 4 This is a schematic diagram of the installation of the anti-pipe abrasion pulley device for drainage ditches provided in the embodiments of this application.

[0037] Among them, 100 is a pulley device to prevent pipe abrasion, 101 is a support frame, 102 is a side support screw, 103 is a rotating handle, 104 is a fixed roller, 105 is a second side support connecting rod, 106 is a side support plate, 107 is a pin, 108 is a guide double conical roller, 109 is a movable roller, 110 is a spring pin, 111 is a limit nut, 112 is a clamping adjustment plate, 113 is a lower fixed plate, 114 is a fixed wing plate, 115 is a fastening bolt, 116 is a back plate, 117 is a side plate, 118 is a connecting plate, 119 is a first side support connecting rod, 120 is a nut, 121 is an upper fixed plate, 122 is a clamping screw, 201 is a water pipe, 301 is a drainage ditch cover, and 302 is a drainage ditch. Detailed Implementation

[0038] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0039] In the process of developing this application, the inventors discovered that the purpose of the railway tunnel drainage ditch dredging and clearing vehicle is to dredge, remove, collect, and unload silt from tunnel drainage facilities such as drainage ditches, manholes, culverts, and dewatering wells. This prevents track bed defects such as mud pumping and siltation caused by silt blockage in drainage ditches, ensuring the safety of vehicle operation.

[0040] High-pressure cleaning and unblocking involves a power unit that uses a high-pressure pump to convert ordinary water pressure into high-pressure water. This high-pressure water then travels through a high-pressure pipeline to a control device, where a high-pressure nozzle converts the water into a high-pressure water jet to wash the surface of an object. When the impact force of the water exceeds the adhesion between the dirt and the object's surface, the high-pressure water jet will peel off and wash away the dirt. When unblocking and cleaning underground drains, an extended hose and a pipe flushing nozzle can be used. The drill bit is inserted deep into the clogged sludge to create space in the middle of the blockage. The nozzle sprays forward to remove hardened blockages, and as the nozzle moves forward, it flushes the blockages backward.

[0041] Because the high-pressure water pipe falls vertically from a height, it moves horizontally forward and backward along the drainage ditch during the operation to perform flushing work. During the operation, due to the dynamic changes in water pressure and the forward and backward movement, it is difficult to guide the water pipe smoothly, which can easily cause the water pipe to run wildly and scrape and abrade the surface of the water pipe against the sides of the drainage ditch.

[0042] Currently, we purchase wire-laying pulleys for electrical equipment, but we lack a supporting and stabilizing mechanism to support the sidewalls of drainage ditches. We can only hold the wire-laying pulleys in place by pressing them down with heavy objects, which makes them very easy to slip during use and difficult to meet the needs of high-pressure water pipes.

[0043] Therefore, it is necessary to design and develop a pulley device for drainage ditches to prevent pipe abrasion, so as to provide stability and guidance support for high-pressure water pipes during horizontal forward and backward flushing operations along the drainage ditch.

[0044] To address the aforementioned problems, this application provides a device for preventing pipe abrasion on pulleys in drainage ditches (hereinafter referred to as the anti-pipe abrasion pulley device 100), such as... Figures 1-4 As shown, it includes:

[0045] The support frame 101 includes a vertically arranged back plate 116 and two side plates 117. The two side plates 117 are vertically connected to the front of the back plate 116. The two side plates 117 are parallel to each other and spaced apart. The bottom of the side plate 117 protrudes forward to provide an installation position for the guide double reverse conical roller 108.

[0046] The fixed roller 104 and the guide double reverse conical roller 108 are respectively installed on the inner side of the two side plates 117 by fastening bolts 115. The guide double reverse conical roller 108 is installed on the inner side of the forward protruding part at the bottom of the two side plates 117. The fixed roller 104 is located directly above the guide double reverse conical roller 108.

[0047] The movable roller 109 has one end of its roller shaft hinged to the side plate 117, and the other end of its roller shaft detachably mounted on the other side plate 117. The movable roller 109 is located directly in front of the guide double reverse conical roller 108.

[0048] The clamping mechanism, installed on the back of the back plate 116, can clamp and fix the drainage ditch cover 301.

[0049] In specific implementation, such as Figure 4As shown, several drainage ditch covers 301 on the drainage ditch 302 are moved to create sufficient installation and usage space for the anti-pipe abrasion pulley device 100 and the water pipe 201. The anti-pipe abrasion pulley device 100 is fixed to the outermost drainage ditch cover 301 using a clamping mechanism. The restriction on the detachable end of the movable roller 109 is released. The water pipe 201 is then passed sequentially through the fixed roller 104 and the guide double-conical roller 108. The detachable end of the movable roller 109 is then relocked, allowing the water pipe 201 to be transported. Smoothly sliding along the surface of the roller assembly, the water falls vertically and is guided horizontally, extending into the drainage ditch 302. Then, the water pipe 201 is connected to the high-pressure pump. The water pipe 201 moves horizontally forward and backward along the drainage ditch 302 for flushing operations. During forward and backward movement, the water pipe 201 always slides between the movable roller 109 and the guide double-cone roller 108, achieving stability and guidance for the water pipe 201. This prevents the water pipe from erratically moving due to dynamic changes in water pressure and movement, and avoids scraping and abrading the surface of the water pipe against the sides of the drainage ditch. Furthermore, the fixed roller 104, the guide double-cone roller 108, and the movable roller 109 form a roller assembly, and the number of rollers can be increased or decreased according to specific usage requirements.

[0050] In the process of realizing this application, the inventors discovered that simply pressing and fixing the clamping mechanism with the drainage ditch cover 301 is insufficient to completely stabilize the anti-pipe abrasion pulley device 100. Although the drainage ditch cover 301 has a certain weight, it is still movable relative to the drainage ditch 302. If the dynamic change of water pressure in the water pipe 201 is too large, the water pipe 201 may cause the anti-pipe abrasion pulley device 100 and the drainage ditch cover 301 to move relative to the drainage ditch 302. If this phenomenon occurs frequently, it may still cause the water pipe 201 to scrape and abrade the water pipe surface with both sides of the drainage ditch.

[0051] To address the aforementioned problems, this application provides a preferred solution: the anti-pipe abrasion pulley device 100 further includes two side support assemblies, respectively installed on the outer sides of the two side plates 117. Each side support assembly includes:

[0052] The vertically arranged connecting plate 118 is tightly installed on the side plate 117 by fastening bolts 115, and a hinged support is provided at its bottom;

[0053] Side support plate 106 is provided on connecting plate 118, and two hinged supports are provided at intervals on the side of connecting plate 118.

[0054] The first side support connecting rod 119 is hinged at one end to the hinge support at the bottom of the connecting plate 118, and at the other end to the hinge support at the bottom of the side support plate 106.

[0055] The side support adjustment mechanism is installed on the upper part of the connecting plate 118, and the output end of the side support adjustment mechanism can perform vertical lifting and lowering movements.

[0056] The second side support connecting rod 105 is hinged at one end to the hinged support of the side support plate 106 located above, and at the other end to the output end of the side support adjustment mechanism.

[0057] As a supplement to the above preferred embodiment, the side bracing adjustment mechanism includes:

[0058] The vertically arranged side support screw 102 has a guide sleeve, a mounting base, and a hinge support arranged sequentially from top to bottom on the connecting plate 118. The top end of the side support screw 102 is connected to a rotating handle 103, and the bottom end of the side support screw 102 passes through the guide sleeve and is rotatably connected to the mounting base.

[0059] Nut 120 is threaded onto the side support screw 102, and the outer side of nut 120 is hinged to the other end of the second side support connecting rod 105.

[0060] In specific implementation, the side support assembly mainly serves to support the anti-pipe abrasion pulley device 100 between the side wall of the drainage ditch 302. When using the clamping mechanism to fix the anti-pipe abrasion pulley device 100 to the outermost drainage ditch cover 301, it is preferable to fix the anti-pipe abrasion pulley device 100 between the two side walls of the drainage ditch 302, providing space for the expansion and deformation support of the side support assembly. After clamping, the side support screw 102 is rotated by rotating the handle 103, and the nut is... 120 converts the rotational motion into linear motion in the vertical direction, and through the transmission of the second side support connecting rod 105, the side support plate 106 can move towards or away from the side plate 117. When the side support assembly needs to be unfolded, the corresponding side support plate 106 moves away from the side plate 117 until both sides of the side support plate 106 are in contact with and abut against the side wall of the drainage ditch 302. With the cooperation of the clamping mechanism, the fixation between the anti-pipe abrasion pulley device 100 and the drainage ditch 302 is completed.

[0061] Furthermore, when the side bracing components on both sides are deployed, it is preferable to first adjust the side bracing components on both sides so that the side bracing plate 106 contacts the side wall of the drainage ditch 302, and then rotate the rotating handle 103 on each side in turn to maintain the force balance of the side bracing components on both sides, which can effectively improve the fixing effect.

[0062] Furthermore, if a relatively narrow drainage ditch 302 is encountered during implementation, the side support assembly can be retracted inward and then enter the drainage ditch 302 before the clamping mechanism is fixed and the subsequent side wall support is installed.

[0063] As a preferred embodiment, the clamping mechanism includes:

[0064] The lower fixing plate 113 is horizontally installed in the middle of the back of the back plate 116;

[0065] The upper fixing plate 121 is horizontally installed on the upper part of the back of the back plate 116;

[0066] A clamping screw 122 is connected to a rotating handle 103 at its top end and a horizontally arranged clamping adjustment plate 112 at its bottom end after passing through the upper fixed plate 121. The clamping screw 122 is threadedly connected to the upper fixed plate 121.

[0067] As a supplement to the above preferred embodiment, the clamping mechanism also includes:

[0068] The limiting nut 111 is threadedly connected to the clamping screw 122 and is located between the upper fixing plate 121 and the rotating handle 103.

[0069] In specific implementation, such as Figure 2 as well as Figure 4 As shown, before installation, first loosen the rotating handle 103 so that there is a distance between the clamping adjustment plate 112 and the lower fixed plate 113 greater than the thickness of the drainage ditch cover 301. Align the back of the back plate 116 with the outermost drainage ditch cover 301. After alignment, move the anti-pipe abrasion pulley device 100 towards the drainage ditch cover 301 until the side wall of the drainage ditch cover 301 is tightly against the back of the back plate 116. Adjust the vertical height of the anti-pipe abrasion pulley device 100 so that the lower surface of the drainage ditch cover 301 is tightly against the upper surface of the lower fixed plate 113. While maintaining the tight fit with one hand, tighten the rotating handle 103 with the other hand. Move the clamping adjustment plate 112 downward until it presses the upper surface of the drainage ditch cover 301. Then tighten the limit nut 111 to complete the fixing of the clamping mechanism.

[0070] As a preferred embodiment, each of the two side plates 117 is provided with a hinge support. One end of the movable roller 109 is hinged to one of the hinge supports via a pin 107. The movable roller 109 can be rotated outward horizontally around the pin 107 to open. The other end of the movable roller 109 is pluggably connected to the hinge support on the other side via a spring pin 110.

[0071] As a preferred option, such as Figure 3 As shown, the side support assembly can be disassembled by releasing the fastening bolts 115 between the connecting plate 118 and the side plate 117. After disassembling the side support assembly, it can be replaced with a fixed wing plate 114. The fixed wing plate 114 is installed on the side plate by fastening bolts 115. By replacing the components, it can adapt to different sizes and cross-sections of the drainage ditch.

[0072] As a preferred embodiment, the side of the side support plate 106 away from the side plate has an uneven surface, which can generate sufficient static friction between the side support assembly and the side wall of the drainage ditch 302 after the side support assembly is deployed.

[0073] This application provides a drainage ditch anti-pipe abrasion pulley device. It features a clamping mechanism to secure the drainage ditch cover, with the width of the mechanism adaptable to different cover thicknesses. A side support assembly, utilizing a side support screw-nut structure, converts rotational motion into vertical linear motion. A hinged side support connecting rod allows the side support plate to unfold or fold to both sides, supporting and securing ditch sidewalls of varying widths. Combined with the clamping mechanism, this device secures itself to the drainage ditch. When folded for storage, it occupies minimal space and is easy to carry. Fixed rollers, guide double-conical rollers, and movable rollers guide the water pipes, preventing abrasion during pipe expansion and contraction. A movable roller with one end pluggable facilitates quick assembly, disassembly, and fixation of the water pipes. The side support assembly can be separated from the support frame by disassembling the connecting plate and can be replaced with a fixed wing plate to accommodate different drainage ditch cross-sections. This application provides a drainage ditch anti-pipe abrasion pulley device, which can provide stability and guidance support for high-pressure water pipes during horizontal forward and backward flushing operations along the drainage ditch. It can adapt to flushing operations of drainage ditches of various sizes, has a good fastening and stability effect, is easy to assemble and disassemble, and has strong practicality.

[0074] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0076] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0077] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0078] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A device for preventing pipe abrasion on pulleys in drainage ditches, characterized in that, include: The support frame (101) includes a back plate (116) and two side plates (117), the two side plates (117) being vertically connected to the front of the back plate (116), and the two side plates (117) being parallel to each other and spaced apart. The fixed roller (104) and the guide double reverse conical roller (108) are respectively installed on the inner side of the two side plates (117) by fastening bolts (115), and the fixed roller (104) is located directly above the guide double reverse conical roller (108); The movable roller (109) has one end of its roller shaft hinged to the side plate (117) and the other end of its roller shaft detachably mounted on the other side plate (117), and the movable roller (109) is located directly in front of the guide double reverse conical roller (108); The clamping mechanism, installed on the back of the back plate (116), is capable of clamping and fixing the drainage ditch cover (301).

2. The anti-pipe abrasion pulley device for drainage ditches according to claim 1, characterized in that, It also includes two side bracing assemblies, respectively mounted on the outer sides of the two side plates (117), each side bracing assembly comprising: The connecting plate (118) is installed on the side plate (117) by fastening bolts (115), and a hinge support is provided at its bottom; Side support plate (106), on which two hinged supports are provided at intervals; The first side support connecting rod (119) is hinged at one end to the hinge support of the connecting plate (118) and at the other end to the hinge support of the side support plate (106) located below. A side support adjustment mechanism is installed on the upper half of the connecting plate (118), and the output end of the side support adjustment mechanism can perform vertical lifting and lowering movements; The second side support connecting rod (105) is hinged at one end to the hinge support above the side support plate (106), and at the other end to the output end of the side support adjustment mechanism.

3. The anti-pipe abrasion pulley device for drainage ditches according to claim 2, characterized in that, The side support adjustment mechanism includes: A vertically arranged side support screw (102) is provided. The connecting plate (118) is provided with a guide sleeve, a mounting seat, and a hinge support from top to bottom. A rotating handle (103) is connected to the top of the side support screw (102). The bottom of the side support screw (102) passes through the guide sleeve and is rotatably connected to the mounting seat. The nut (120) is threaded onto the side support screw (102), and the outer side of the nut (120) is hinged to the other end of the second side support connecting rod (105).

4. The anti-pipe abrasion pulley device for drainage ditches according to claim 1, characterized in that, The clamping mechanism includes: The lower fixing plate (113) is horizontally installed in the middle of the back side of the back plate (116); The upper fixing plate (121) is horizontally installed on the upper part of the back side of the back plate (116); A clamping screw (122) is connected to a rotating handle (103) at its top end, and a horizontally arranged clamping adjustment plate (112) is connected to its bottom end after passing through the upper fixing plate (121). The clamping screw (122) is threadedly connected to the upper fixing plate (121).

5. The anti-pipe abrasion pulley device for drainage ditches according to claim 4, characterized in that, The clamping mechanism further includes: The limiting nut (111) is threadedly connected to the clamping screw (122) and is disposed between the upper fixing plate (121) and the rotating handle (103).

6. The anti-pipe abrasion pulley device for drainage ditches according to claim 1, characterized in that, The two side plates (117) are respectively provided with hinged supports. One end of the movable roller (109) shaft is hinged to the hinged support on one side via a pin (107). The movable roller (109) shaft can be rotated outward horizontally around the pin (107) to open. The other end of the movable roller (109) shaft is pluggably connected to the hinged support on the other side via a spring pin (110).

7. The anti-pipe abrasion pulley device for drainage ditches according to claim 3, characterized in that, The side support assembly can be disassembled by releasing the fastening bolts (115) between the connecting plate (118) and the side plate (117). After disassembling the side support assembly, it can be replaced with a fixed wing plate (114), which is installed on the side plate (117) by fastening bolts (115).

8. The anti-pipe abrasion pulley device for drainage ditches according to claim 2, characterized in that, The side of the side support plate (106) away from the side plate has an uneven surface.

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