A highway abutment backfilling device using liquid fly ash material

Abstract

This invention discloses a liquid fly ash backfilling device for highway abutments, comprising a strip-shaped cavity with a fixing device on it, three channels within the cavity, all three channels sharing an opening and closing device, and a gravity conversion transmission device between adjacent channels. Two scrapers are connected to one side of the strip-shaped cavity. The invention connects the strip-shaped cavity to the outlet of a pump truck's output pipe to ensure the passage of liquid fly ash for backfilling. As the liquid fly ash descends, it contacts the gravity conversion transmission device, which drives the scrapers to move along the length of the strip-shaped cavity, pushing the liquid fly ash to both sides. The opening and closing device adjusts the opening and closing states of the three channels to drive the movement direction of the gravity conversion transmission device, thereby achieving the reciprocating motion of the scrapers. This ensures the liquid fly ash is evenly distributed under the push of the scrapers, and the scrapers utilize the gravity of the liquid fly ash itself, reducing energy consumption.

Description

Technical Field

[0001] This invention relates to the field of backfilling technology for highway abutments, specifically to a backfilling device using liquid fly ash material for highway abutments. Background Technology

[0002] The abutment backfill refers to the section of roadbed that connects to the main roadbed on one or both sides of the abutment or culvert. The quality of the abutment backfill is a major cause of bridge approach slab settlement. The technology of using liquid fly ash to backfill the abutment backfill has the advantages of lightweight filler, simple process, short construction period and reliable quality.

[0003] Currently, when backfilling the backfill area, liquid fly ash is typically pumped from a distance using a pump truck to the backfill area. The next step is carried out only after complete backfilling. However, when pumping liquid fly ash, the pump truck's output pipe is generally stationary, causing the liquid fly ash to fall and fill the backfill area in a fixed position. This results in a concentrated accumulation of liquid fly ash near the backfill area during the filling process. Then, under gravity, the liquid fly ash slides outwards, gradually filling the entire backfill area. This uneven distribution of liquid fly ash necessitates subsequent adjustments to its distribution, increasing construction steps and reducing efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a liquid fly ash material backfilling device for highway abutments, which solves the problem of reduced construction efficiency caused by uneven distribution of liquid fly ash due to the fixed position of the pump truck's delivery pipeline when backfilling the abutment area.

[0005] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0006] A backfilling device for liquid fly ash material for highway abutments includes a strip-shaped cavity connected to the outlet of a pump truck's output pipe. The strip-shaped cavity is provided with a fixing device that is fixed to the end of the pump truck's output pipe by clamping it from the outside. Three channels for liquid fly ash to pass through are provided along the length of the strip-shaped cavity at the connection point with the pump truck's output pipe. The three channels are provided with an opening and closing device. A gravity conversion transmission device is provided between each pair of adjacent channels. Two scrapers that move in a straight line and are connected to the corresponding gravity conversion transmission devices are slidably connected to the side of the strip-shaped cavity facing the ground.

[0007] The gravity conversion transmission device is driven to rotate and convert into linear motion by the release of liquid fly ash in the channel, which in turn drives the scraper to move in a linear motion. The opening and closing device is used to control the opening and closing of the channel located in the middle position or to control the opening and closing of the channels located on both sides at the same time to adjust the movement direction of the gravity conversion transmission device. The strip cavity is connected to the outside to allow liquid fly ash to pass through.

[0008] As a preferred embodiment of the present invention, the strip cavity includes a strip seat and a cavity disposed inside the strip seat. On the side of the cavity near the ground, a plurality of discharge ports for liquid fly ash to pass through are provided along the length direction of the strip seat, and the middle position of the side of the cavity where the discharge ports are provided is linearly inclined downward and concave along the setting direction of the discharge ports.

[0009] As a preferred embodiment of the present invention, the opening and closing device includes a feed inlet disposed on the strip seat for the end of the pump truck output pipe to be inserted and not communicating with the cavity. The feed inlet has two opposing side walls with internal cavities. Each internal cavity is connected to a push rod that passes through the internal cavity to the feed inlet by a telescopic mechanism. Each push rod has a sealing plate at its end for closing the channel. The two sealing plates have an upward protrusion on the side opposite to the channel to form a concave arc surface.

[0010] The two telescopic mechanisms move in opposite directions and are located on the same straight line. The two curved surfaces are on opposite sides in a direction perpendicular to the sealing plate and extend downward along an arc from the side of the sealing plate away from the telescopic mechanism towards the telescopic mechanism.

[0011] In a preferred embodiment of the present invention, the distance between the sealing plate and the bottom of the feed inlet is greater than zero, and a guide plate located in the middle of the channel is vertically arranged on the side of the sealing plate facing the channel, and the maximum distance between the two guide plates is less than the width of the channel.

[0012] As a preferred embodiment of the present invention, an elastic plate parallel to the guide plate is provided on the side of the sealing plate facing the channel, and the elastic plate is located on the two opposite sides of the two guide plates. The minimum distance between the two elastic plates is less than the width of the channel, and the maximum distance is greater than the width of the channel.

[0013] As a preferred embodiment of the present invention, the inner wall of the inner cavity is provided with a through hole for the push rod to pass through, and the inner sidewall of the through hole is inclined toward the inner bottom of the feed port.

[0014] As a preferred embodiment of the present invention, the gravity conversion transmission device includes a mounting groove disposed in the strip seat between two adjacent channels and communicating with the two adjacent channels. A connecting shaft extending to the outside of the strip seat is rotatably connected in the mounting groove. A rolling transmission structure located in the mounting groove is fixedly connected to the connecting shaft. A traction structure is provided on the portion of the connecting shaft located outside the connecting seat.

[0015] The rolling transmission structure rotates by contacting the falling liquid fly ash, and the traction structure is used to drive the corresponding scraper to move by rotating the connecting shaft. The axis of the connecting shaft is perpendicular to the vertical plane when the pump truck is working.

[0016] As a preferred embodiment of the present invention, the rolling transmission structure includes a connecting roller fixedly connected to the connecting shaft, and a plurality of fan blades are evenly arranged on the surface of the connecting roller around the axis, and the edge of each fan blade facing away from the connecting roller is blade-shaped.

[0017] As a preferred embodiment of the present invention, the traction structure includes a rotating roller disposed on the connecting shaft and two guide wheels disposed on the outer wall of the strip seat. Two elastic belts are connected to the rotating roller and are respectively connected to both ends of the scraper. The two guide wheels are respectively located at both ends of the scraper's movement path. Each elastic belt is connected to one end of the scraper through the corresponding guide wheel.

[0018] As a preferred embodiment of the present invention, two connecting plates are sequentially arranged on the side of the scraper facing the through hole along the direction of movement, and the two connecting plates are respectively located on both sides of the scraper and connected to the corresponding elastic band.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] This invention connects a strip-shaped cavity to the outlet of the pump truck's output pipe to ensure the passage of liquid fly ash for backfilling. As the liquid fly ash descends, it contacts a gravity conversion transmission device, which drives a scraper to move along the length of the strip-shaped cavity, pushing the liquid fly ash to both sides. The opening and closing status of the three channels is adjusted by an opening and closing device to drive the movement direction of the gravity conversion transmission device, thereby realizing the reciprocating motion of the scraper. This ensures that the liquid fly ash is evenly distributed under the push of the scraper, and the scraper utilizes the gravity of the liquid fly ash itself to reduce energy consumption. Attached Figure Description

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0022] Figure 1 This is a side cross-sectional view of a liquid fly ash material backfilling device for highway abutments provided in an embodiment of the present invention;

[0023] Figure 2 Provided for embodiments of the present invention Figure 1 An enlarged structural diagram of part A shown in the figure;

[0024] Figure 3 This is a side view of a liquid fly ash material backfilling device for highway abutments, provided in an embodiment of the present invention.

[0025] The labels in the diagram represent the following:

[0026] 1-Strip-shaped cavity; 2-Fixing device; 3-Channel; 4-Opening and closing device; 5-Gravity conversion transmission device; 6-Scraper; 7-Connecting plate;

[0027] 101-Strip seat; 102-Cavity; 103-Discharge port;

[0028] 401 - Feed inlet; 402 - Inner cavity; 403 - Telescopic mechanism; 404 - Push rod; 405 - Sealing plate; 406 - Arc-shaped surface; 407 - Guide plate; 408 - Elastic plate; 409 - Through hole;

[0029] 501-Mounting groove; 502-Connecting shaft; 503-Rolling transmission structure; 504-Traction structure; 505-Connecting roller; 506-Fan blade; 507-Rotating roller; 508-Guide wheel; 509-Elastic belt. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1 to 3As shown, the present invention provides a backfilling device for liquid fly ash material for highway abutments, including a strip-shaped cavity 1 connected to the outlet of a pump truck's output pipe. A fixing device 2 is provided on the strip-shaped cavity 1 and is fixed to the end of the pump truck's output pipe by clamping it from the outside. Three channels 3 for liquid fly ash to pass through are provided along the length of the strip-shaped cavity 1 at the connection point with the pump truck's output pipe. The three channels are provided with an opening and closing device 4. A gravity conversion transmission device 5 is provided between each two adjacent channels 3. Two scrapers 6 are slidably connected to the side of the strip-shaped cavity 1 facing the ground and move in a straight line and are connected to the corresponding gravity conversion transmission device 5.

[0032] The gravity conversion transmission device 5 is driven to rotate and convert into linear motion by the release of liquid fly ash in the channel 3, and drives the scraper 6 to move in a straight line. The opening and closing device 4 is used to control the opening and closing of the channel 3 located in the middle position or to control the opening and closing of the channels 3 located on both sides at the same time to adjust the movement direction of the gravity conversion transmission device 5. The strip cavity 1 is connected to the outside to allow liquid fly ash to pass through.

[0033] When this invention is in use, since the liquid fly ash is pumped out and transported at a fixed position, the strip cavity 1 is connected to the outlet of the pump truck's output pipe through the fixing device 2. The liquid fly ash is output to the outside through the strip cavity 1, ensuring normal backfilling of the road abutment.

[0034] In this embodiment, the fixing device 2 clamps the strip cavity 1 to the output pipe by clamping it to both sides of the outer wall of the pump truck output pipe.

[0035] Three channels 3 are arranged along the length of the strip cavity 1. When the middle channel 3 is open, the two channels 3 on both sides are closed by the opening and closing device 4. At this time, when the liquid fly ash passes through the channel 3, it comes into contact with the gravity conversion transmission device 5 and is driven to rotate by its own downward motion, which is then converted into linear motion, thereby driving the scraper 6 to move along the length of the strip cavity 1.

[0036] When the middle channel 3 is closed by the opening and closing device 4, the two channels 3 on both sides are opened at the same time. At this time, the contact position between the gravity conversion transmission device 5 and the liquid fly ash changes, so that the rotation direction of the gravity conversion transmission device 5 is reversed, thereby driving the scraper 6 to move in the opposite direction and realizing the reciprocating motion of the scraper 6.

[0037] The reciprocating motion of the two scrapers 6 makes the liquid fly ash filled to the back of the platform evenly distributed by scraping it to both sides, avoiding the need to adjust the distribution through subsequent processes and improving construction efficiency.

[0038] Secondly, during the entire operation of the device, only the opening and closing device 4 requires external power intervention. The scraper 6 is driven by the collision of the descending liquid fly ash, which reduces energy consumption.

[0039] In this embodiment, the gravity conversion transmission device 5 is a device that rotates upon collision with the descending liquid fly ash and converts the rotation through its own structure into linear motion for traction of the scraper 6, thereby reducing energy consumption, improving the effective utilization of the gravitational potential energy of the liquid fly ash, and ensuring uniform dispersion of the liquid fly ash.

[0040] The strip cavity 1 includes a strip seat 101 and a cavity 102 disposed inside the strip seat 101. On the side of the cavity 102 near the ground, a plurality of discharge ports 103 are provided along the length direction of the strip seat 101, which are symmetrical about the center of the strip seat 101 for the passage of liquid fly ash. The middle part of the side of the cavity 102 where the discharge ports 103 are provided is linearly inclined downward and concave along the setting direction of the discharge ports 103.

[0041] When the strip cavity 1 is in use, the strip seat 101 is fixed to the outlet of the output pipe by the fixing device 2. Liquid fly ash enters the cavity 102 and is released to the outside through the discharge port 103 to fill the back of the platform.

[0042] Multiple discharge ports 103 are distributed along the length of the strip seat 101, and the inner bottom of the cavity 102 gradually slopes downward and concave from the center to both sides, so that the liquid fly ash released into the cavity 102 through the output pipe flows to both sides along the inner bottom of the cavity 102, which helps to improve the uniformity of the liquid fly ash released through the discharge ports 103.

[0043] The opening and closing device 4 includes a feed inlet 401 provided on the strip seat 101 for the end of the pump truck output pipe to be inserted and not connected to the cavity 102. The feed inlet 401 has two opposite side walls with inner cavities 402. Each inner cavity 402 is connected to a push rod 404 through the inner cavity 402 to the feed inlet 401 by a telescopic mechanism 403. Each push rod 404 has a sealing plate 405 at its end for closing the channel 3. The side of the two sealing plates 405 facing away from the channel 3 protrudes upward to form a concave arc surface 406.

[0044] The two telescopic mechanisms 403 move in opposite directions and are located on the same straight line. The two curved surfaces are on opposite sides in a direction perpendicular to the sealing plate 405 and extend downward along the arc from the side of the sealing plate 405 away from the telescopic mechanism 403 towards the telescopic mechanism 403.

[0045] When in use, the opening and closing device 4 drives the push rod 404 through the telescopic mechanism 403 to move the corresponding sealing plate 405. When the middle channel 3 is closed, the two sealing plates 405 move towards each other under the drive of the push rod 404 until they contact the closed channel 3. The liquid fly ash is guided through the two arc surfaces 406 to pass into the two channels 3 on both sides.

[0046] When the middle channel 3 is opened, the two sealing plates 405 move in opposite directions under the traction of the push rod 404 to close the channels 3 on both sides, and the liquid fly ash is released into the cavity 102 through the middle channel 3.

[0047] By adjusting the contact position between the gravity conversion transmission device 5 and the liquid fly ash through the closure of the channel 3 by the opening and closing device 4, the reciprocating motion of the scraper 6 is achieved.

[0048] The inner cavity 402 is designed to prevent liquid fly ash from coming into contact with the telescopic mechanism 403 during release, thus avoiding malfunction.

[0049] Furthermore, the position of channel 3 should have a certain distance between it and the inner wall of the feed inlet 401 to prevent liquid fly ash from entering the inner cavity 402 and coming into contact with the telescopic mechanism 403 when it is released, thus preventing malfunction.

[0050] In this embodiment, the telescopic mechanism 403 is a mechanism that drives the push rod 404 to perform reciprocating linear motion, such as an electric push rod.

[0051] Furthermore, the channel 3 in the middle position should be located in the middle of the inner bottom of the feed inlet 401 and correspond to the outlet of the output pipe to ensure that the arc surface 406 effectively guides the release of liquid fly ash.

[0052] The gap between the sealing plate 405 and the bottom of the feed inlet 401 is greater than zero. The sealing plate 405 is vertically arranged on the side facing the channel 3 with a guide plate 407 located in the middle of the channel 3. The maximum gap between the two guide plates 407 is less than the width of the channel 3.

[0053] When liquid fly ash passes through the channels 3 on both sides via the guide plate 407, it slides down the bottom of the sealing plate 405 into the middle channel 3 and comes into contact with the gravity conversion transmission device 5, thus avoiding any impact on the movement of the gravity conversion transmission device 5.

[0054] Furthermore, the maximum distance between the two guide plates 407 is greater than the width of the channel 3, so as to avoid interference between the guide plates 407 and the inner wall of the channel 3 during the movement of the sealing plate 405.

[0055] Furthermore, the distance between the sealing plate 405 and the bottom of the feed inlet 401 is greater than zero, so as to prevent liquid fly ash adhering to the bottom of the feed inlet 401 from continuously contacting the sealing plate 405 and thus avoiding affecting the movement of the sealing plate 405.

[0056] An elastic plate 408 parallel to the guide plate 407 is provided on the side of the sealing plate 405 facing the channel 3, and the elastic plate 408 is located on the opposite sides of the two guide plates 407. The minimum distance between the two elastic plates 408 is less than the width of the channel 3, and the maximum distance is greater than the width of the channel 3.

[0057] Since the minimum distance between the two elastic plates 408 is less than the width of the channel 3 and the maximum distance is greater than the width of the channel 3, the elastic plates 408 will move back and forth between the channel 3 in the middle position and the channels 3 on both sides when they move, and will scrape and deform against the inner bottom of the feed inlet 401 between the two adjacent channels 3, thereby scraping off the adhering liquid fly ash and avoiding interference between the liquid fly ash and the sealing plate 405 after solidification, which would cause malfunctions.

[0058] The inner wall of the inner cavity 402 is provided with a through hole 409 for the push rod 404 to pass through, and the inner side wall of the through hole 409 is inclined towards the inner bottom of the feed port 401.

[0059] The push rod 404 passes through a through hole 409, and the inner wall is inclined downwards, so that the liquid fly ash splashed into the through hole 409 will slide off the inclined inner wall by gravity, thus avoiding the solidification of the liquid fly ash from interfering with the movement of the push rod 404.

[0060] The gravity conversion transmission device 5 includes a mounting groove 501 located between and communicating with two adjacent channels 3 within a strip seat 101. A connecting shaft 502 extending to the outside of the strip seat 101 is rotatably connected within the mounting groove 501. A rolling transmission structure 503 located within the mounting groove 501 is fixedly connected to the connecting shaft 502. A traction structure 504 is provided on the portion of the connecting shaft 502 located outside the connecting seat 101.

[0061] The rolling transmission structure 503 rotates by contacting the falling liquid fly ash, and the traction structure 504 is used to drive the corresponding scraper 6 to move by rotating the connecting shaft 502. The axis of the connecting shaft 502 is perpendicular to the vertical plane when the pump truck is working.

[0062] When the gravity conversion transmission device 5 is in use, the rolling transmission structure 503 rotates by colliding with the liquid fly ash and is transmitted to the traction structure 504 through the connecting shaft 502. The traction structure 504 drives the traction scraper 6 to move in a straight line through the rotation of the connecting shaft 502, so that the scraper 6 pushes the liquid fly ash to be evenly distributed, thereby improving the construction efficiency.

[0063] Furthermore, the two rolling transmission structures 503 are located between two adjacent channels 3, which allows the direction of movement of the scraper 6 to be adjusted by closing the three channels 3, thereby realizing the reciprocating motion of the scraper 6 to continuously and uniformly disperse the liquid fly ash.

[0064] The rolling transmission structure 503 includes a connecting roller 505 fixedly connected to the connecting shaft 502. Multiple fan blades 506 are evenly arranged on the surface of the connecting roller 505 around the axis, and the edge of each fan blade 506 facing away from the connecting roller 505 is blade-shaped.

[0065] When the rolling transmission structure 503 is in use, the fan blade 506 collides with the falling liquid fly ash. After the liquid fly ash collides with the fan blade 506, it drives the fan blade 506 to move and drives the connecting roller 505 to rotate, so that multiple fan blades 506 rotate synchronously and continuously contact the liquid fly ash, thereby realizing the continuous driving of the scraper 506.

[0066] Furthermore, the edge of the fan blade 506 is blade-shaped, which facilitates the detachment of liquid fly ash that is in contact with the surface of the fan blade 506 from the fan blade 506.

[0067] The traction structure 504 includes a rotating roller 507 mounted on the connecting shaft 502 and two guide wheels 508 mounted on the outer wall of the strip seat 101. The rotating roller 507 is connected to two elastic belts 509 that are respectively connected to both ends of the scraper 6, and the two guide wheels 508 are located at both ends of the movement path of the scraper 6. Each elastic belt 509 is connected to one end of the scraper 6 through the corresponding guide wheel 508.

[0068] When the traction structure 504 is in use, the connecting shaft 502 drives the rotating roller 507 to rotate, so that one elastic band 509 gradually wraps around the rotating roller 507, and the other elastic band 509 gradually releases from the rotating roller 507, thereby tractioning the scraper 6 to move in a straight line in one direction.

[0069] The guide wheel 508 is used to adjust the traction direction of the elastic belt 509 to be approximately consistent with the movement direction of the scraper 6, so as to ensure effective traction of the scraper 6.

[0070] The elastic band 509 itself is elastic, which prevents the elastic band 509 from breaking due to inconsistent length changes on both sides and unwinding during the traction process.

[0071] Two connecting plates 7 are sequentially arranged on the side of the scraper 6 facing the through hole 3 along the direction of movement, and the two connecting plates 7 are located on both sides of the scraper 6 and connected to the corresponding elastic band 509.

[0072] The two connecting plates 7 increase the connection height between the elastic belt 509 and the scraper 6, thus preventing the elastic belt 509 from contacting liquid fly ash and causing malfunctions.

[0073] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A backfilling device for liquid fly ash material used on highway abutments, characterized in that, The system includes a strip cavity (1) connected to the outlet of the pump truck's output pipe. The strip cavity (1) is provided with a fixing device (2) that is fixed to the end of the pump truck's output pipe by clamping it from the outside. The strip cavity (1) has three channels (3) for liquid fly ash to pass through at the connection point with the pump truck's output pipe along the length of the strip cavity (1). The three channels are provided with an opening and closing device (4). A gravity conversion transmission device (5) is provided between each two adjacent channels (3). The strip cavity (1) has two scrapers (6) that move in a straight line and are connected to the corresponding gravity conversion transmission device (5) on the side facing the ground. The gravity conversion transmission device (5) is driven to rotate and convert into linear motion by the release of liquid fly ash in the channel (3), and drives the scraper (6) to move linearly. The opening and closing device (4) is used to control the opening and closing of the channel (3) located in the middle position or to control the opening and closing of the channels (3) located on both sides at the same time to adjust the movement direction of the gravity conversion transmission device (5). The strip cavity (1) is connected to the outside to allow liquid fly ash to pass through. The strip cavity (1) includes a strip seat (101) and a cavity (102) set inside the strip seat (101). On the side of the cavity (102) near the ground, along the length direction of the strip seat (101), there are a plurality of discharge ports (103) for liquid fly ash to pass through, which are symmetrical about the center of the strip seat (101). 102) The middle part of the side where the discharge port (103) is provided is linearly inclined and concave in the direction of the discharge port (103); the opening and closing device (4) includes a feed port (401) provided on the strip seat (101) for the end of the pump truck output pipe to be inserted and not connected to the cavity (102). The two opposite side walls of the feed port (401) are provided with inner cavities (402). Each inner cavity (402) is connected to a push rod (404) through the inner cavity (402) to the feed port (401) by a telescopic mechanism (403). The end of each push rod (404) is provided with a sealing plate (405) for closing the channel (3). The side of the two sealing plates (405) opposite to the channel (3) protrudes upward to form a concave arc surface (406). The two telescopic mechanisms (403) move in opposite directions and are located on the same straight line. The two arc surfaces (406) are planes on opposite sides in a direction perpendicular to the sealing plate (405), and extend downward along an arc from the side of the sealing plate (405) away from the telescopic mechanism (403) towards the telescopic mechanism (403). The gravity conversion transmission device (5) includes a mounting groove (501) located between two adjacent channels (3) and communicating with the two adjacent channels (3) in the strip seat (101). A connecting shaft (502) extending to the outside of the strip seat (101) is rotatably connected in the mounting groove (501). A rolling transmission structure (503) located in the mounting groove (501) is fixedly connected to the connecting shaft (502). A traction structure (504) is provided on the part of the connecting shaft (502) outside the strip seat (101). The rolling transmission structure (503) rotates by contacting the falling liquid fly ash, and the traction structure (504) is used to drive the corresponding scraper (6) to move by rotating the connecting shaft (502). The axis of the connecting shaft (502) is perpendicular to the vertical plane when the pump truck is working.

2. The backfilling device for liquid fly ash material used on highway abutments according to claim 1, characterized in that, The distance between the sealing plate (405) and the bottom of the feed inlet (401) is greater than zero. The sealing plate (405) is vertically arranged with a guide plate (407) located in the middle of the channel (3) on one side facing the channel (3), and the maximum distance between the two guide plates (407) is less than the width of the channel (3).

3. The backfilling device for liquid fly ash material used on highway abutments according to claim 2, characterized in that, The sealing plate (405) is provided with an elastic plate (408) parallel to the guide plate (407) on the side facing the channel (3), and the elastic plate (408) is located on the opposite sides of the two guide plates (407). The minimum distance between the two elastic plates (408) is less than the width of the channel (3), and the maximum distance is greater than the width of the channel (3).

4. The backfilling device for liquid fly ash material used on highway abutments according to claim 1, characterized in that, The inner wall of the inner cavity (402) is provided with a through hole (409) for the push rod (404) to pass through, and the inner sidewall of the through hole (409) is inclined toward the inner bottom of the feed port (401).

5. A backfilling device for liquid fly ash material used on highway abutments according to claim 1, characterized in that, The rolling transmission structure (503) includes a connecting roller (505) fixedly connected to the connecting shaft (502). The surface of the connecting roller (505) is uniformly provided with a plurality of fan blades (506) around the axis, and the edge of each fan blade (506) facing away from the connecting roller (505) is blade-shaped.

6. A backfilling device for liquid fly ash material used on highway abutments according to claim 5, characterized in that, The traction structure (504) includes a rotating roller (507) disposed on the connecting shaft (502) and two guide wheels (508) disposed on the outer wall of the strip seat (101). The rotating roller (507) is connected to two elastic belts (509) that are respectively connected to both ends of the scraper (6), and the two guide wheels (508) are respectively located at both ends of the movement path of the scraper (6). Each elastic belt (509) is connected to one end of the scraper (6) through the corresponding guide wheel (508).

7. A backfilling device for liquid fly ash material used on highway abutments according to claim 6, characterized in that, Two connecting plates (7) are sequentially arranged on the side of the scraper (6) facing the channel (3) along the direction of movement, and the two connecting plates (7) are located on both sides of the scraper (6) and connected to the corresponding elastic band (509).

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