Double-layer wheel type sand blocking wall

Abstract

The invention relates to the field of engineering sand prevention, in particular to a double-layer wheel type sand blocking wall which comprises a windward side, a leeward side and a connecting plate, the windward side and the leeward side each comprise at least two stand columns, cross rods and impellers, the stand columns are fixedly connected with the ground, the cross rods are arranged between the adjacent stand columns, and the impellers are arranged on the cross rods. The two ends of the transverse rod are fixedly connected with the two stand columns respectively, a plurality of impellers are arranged on the transverse rod, each impeller is fixedly connected with a rotating shaft, the rotating shafts are rotationally connected with the transverse rod, limiters are arranged on the impellers, the limiters are installed on the rotating shafts and used for limiting the rotating directions of the impellers, and the rotating directions of the impellers on the adjacent transverse rods are opposite. The connecting plates are arranged between the stand column on the windward side and the stand column on the leeward side, the two ends of each connecting plate are fixedly connected with the two stand columns correspondingly, and the cleaning devices are arranged between the adjacent connecting plates and used for cleaning away sand wind deposited between the windward side and the leeward side, so that the effect of prolonging the service life of the sand blocking wall is achieved.

Description

Technical Field

[0001] The present application relates to the field of engineering sand prevention, and in particular to a double-layer wheel-type sand retaining wall. Background Art

[0002] At present, with the rapid development of economic construction in western my country, urban infrastructure construction such as railways and highways has been widely carried out in the desert and Gobi areas in northwest my country, where vegetation is sparse and there is a lot of wind and sand. Since the opening of Lanzhou-Xinjiang Railway and Qinghai-Tibet Railway, wind and sand disasters have become a major hidden danger to the safe operation of trains. The suspension of trains due to the burial of railways by wind and sand has caused huge economic losses to people's travel and railway transportation.

[0003] The existing engineering sand control measures mainly include sand fixation and sand blocking, and sand blocking measures are more commonly used. Commonly used sand blocking measures include concrete sleeper sand retaining walls, PE net high vertical sand barriers, reed sand retaining fences, etc. These engineering sand control measures have played a certain role in the prevention and control of wind and sand disasters in existing railways, highways, etc.

[0004] The above-mentioned existing technical solutions have the following defects: the existing sand-blocking measures all use their own performance to forcibly block the wind and sand when in use, which makes the sand-blocking measures easy to be damaged and shortens the service life. Summary of the invention

[0005] In order to increase the service life of the sand retaining wall, the present application provides a double-layer wheeled sand retaining wall.

[0006] The above technical objectives of this application are achieved through the following technical solutions: A double-layer wheeled sand retaining wall comprises a windward side, a leeward side and a connecting plate, wherein the windward side and the leeward side both comprise columns, cross bars and impellers, wherein at least two columns are provided, each column is vertically provided and fixedly connected to the ground, a plurality of cross bars are provided between adjacent columns, each cross bar is perpendicular to the column, both ends of the cross bar are respectively fixedly connected to the two columns, a plurality of impellers are provided on each cross bar, each impeller is fixedly connected to a rotating shaft, the rotating shaft is rotatably connected to the cross bar, a limiter is provided on each impeller, the limiter is installed on the rotating shaft and is used to limit the rotation direction of the impeller, and the impellers on adjacent cross bars rotate in opposite directions; The connecting plate is arranged between the columns on the windward side and the columns on the leeward side, and the two ends of the connecting plate are fixedly connected to the two columns respectively. A cleaning device is arranged between adjacent connecting plates, and the cleaning device is used to clean the deposited wind sand between the windward side and the leeward side.

[0007] Furthermore, the cleaning device includes a driving member, a reciprocating screw, a slider and a sand cleaning member. The driving member is fixedly connected to the connecting plate, and both ends of the reciprocating screw are respectively rotatably connected to the connecting plate. The driving member is connected to the reciprocating screw to drive the reciprocating screw to rotate. The slider is arranged between the two connecting plates. The slider is threadedly connected to the reciprocating screw. The slider is fixedly connected to the sand cleaning member, and the rotation of the reciprocating screw is used to drive the slider and the sand cleaning member to slide between the two connecting plates.

[0008] Furthermore, the slider is also provided with a guide rod, both ends of the guide rod are respectively fixedly connected to the two connecting plates, and the guide rod is slidably connected to the slider.

[0009] Furthermore, the driving member is provided with a power supply device, which includes a micro-generator and a battery. Each rotating shaft is provided with a micro-generator, the rotor of the micro-generator is fixedly connected to the rotating shaft, the micro-generator is fixedly connected to the cross bar, the battery is fixedly connected to the column, each micro-generator is electrically connected to the battery, and the battery is electrically connected to the driving member.

[0010] Furthermore, a rectifier is provided between the micro-generator and the battery, the rectifier is electrically connected to both the micro-generator and the battery, and the rectifier is used to convert the variable direct current generated by wind power generation into stable direct current.

[0011] Furthermore, a connecting device is provided between the micro-generator and the cross bar, the connecting device comprises a bearing plate and a support rod, the bearing plate is fixedly connected to the cross bar, the bearing plate is fixedly connected to the micro-generator, and both ends of the support rod are respectively fixed to the cross bar and an end of the bearing plate away from the cross bar.

[0012] Furthermore, the limiter is arranged at the end of the rotating shaft passing through the cross bar away from the impeller, and the limiter includes a fixed ratchet, a sliding ratchet and an elastic member, the fixed ratchet is fixedly connected to the end of the rotating shaft away from the impeller, the sliding ratchet is arranged between the fixed ratchet and the cross bar, the sliding ratchet is sleeved on the outside of the rotating shaft, the sliding ratchet is slidably connected to the rotating shaft, the elastic member is arranged between the sliding ratchet and the cross bar, the elastic member is sleeved on the outside of the rotating shaft, and the two ends of the elastic member are respectively fixedly connected to the sliding ratchet and the cross bar.

[0013] Furthermore, a telescopic sleeve is sleeved on the outer side of the elastic member, the telescopic sleeve includes a fixed sleeve and a sliding sleeve, the fixed sleeve is fixedly connected to the cross bar, the sliding sleeve is fixedly connected to the sliding ratchet, the end of the sliding sleeve away from the sliding ratchet is inserted into the fixed sleeve, and the sliding sleeve is slidably connected to the fixed sleeve.

[0014] Furthermore, a limiting assembly is arranged between the sliding sleeve and the fixed sleeve, and the limiting assembly includes a limiting strip and a limiting groove. The limiting strip is fixedly connected to the sliding sleeve, and the limiting groove is provided on the inner wall of the fixed sleeve. The limiting strip is inserted into the limiting groove, and the limiting strip is slidably connected to the limiting groove.

[0015] Furthermore, a cleaning brush is provided between the fixed sleeve and the sliding sleeve. The cleaning brush is fixedly connected to the fixed sleeve. The cleaning brush is used to clean sand and dust on the outer wall of the sliding sleeve to prevent sand and dust from entering the telescopic sleeve.

[0016] In summary, this application has the following technical effects: 1. By setting up an impeller and a limiter, the impeller is rotated by the wind. The airflow generated by the rotation of the impeller disturbs the blowing wind, reducing the speed of the wind and sand and reducing the ability of the wind and sand to carry sand and dust. The limiter is used to limit the rotation direction of the impeller. At the same time, the impellers on adjacent cross bars rotate in opposite directions, making the turbulence generated by the impeller more chaotic, further reducing the wind speed of the wind and sand, achieving good sand blocking performance. At the same time, the turbulence is used to turbulently slow down the wind and sand in advance, reducing the wind speed when the wind and sand contact the sand retaining wall, thereby increasing the service life of the sand retaining wall; 2. By setting up a telescopic sleeve, the normal use of various components in the limiter is protected, and the components are prevented from not being able to operate normally due to the invasion of wind and sand, which further increases the service life of the sand retaining wall; 3. By setting up a cleaning device and a power supply device, wind power is used to generate electricity for storage, and then the stored electricity is used to drive the sand cleaning device to move back and forth between the two columns, so that the sand cleaning device cleans the wind-blown sand deposited between the two columns, thereby preventing the sand retaining wall from being buried by accumulated sand and affecting the service life of the sand retaining wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a double-layer wheel-type sand retaining wall of the present application; Figure 2 This is a structural schematic diagram of the double-layer wheeled sand retaining wall of the present application from another angle; Figure 3 It is a structural schematic diagram of the impeller and the limiter of the present application; Figure 4 It is a schematic diagram of the structure of the cleaning device of the present application; Figure 5 It is a schematic diagram of the structure of the limiter of the present application; Figure 6 is a schematic diagram showing the structure of the installed components.

[0018] In the figure, 1, windward side; 2, leeward side; 3, column; 31, cross bar; 32, impeller; 33, rotating shaft; 4, connecting plate; 5, cleaning device; 51, driving member; 52, reciprocating screw; 53, sliding block; 54, sand cleaning member; 6, guide rod; 7, power supply device; 71, micro generator; 72, battery; 8, connecting device; 81, bearing plate; 82, connecting rod; 9, limiter; 91, fixed ratchet; 92, sliding ratchet; 93, elastic member; 10, telescopic sleeve; 101, fixed sleeve; 102, sliding sleeve; 20, limit assembly; 201, limit strip; 202, limit groove; 30, cleaning brush; 40, mounting assembly; 401, mounting block; 402, locking bolt; 403, anti-loosening gasket; 50, mounting rod. DETAILED DESCRIPTION

[0019] The present application is further described in detail below in conjunction with the accompanying drawings.

[0020] Reference Figure 1 and Figure 2 The present embodiment provides a double-layer wheeled sand retaining wall, including a windward side 1, a leeward side 2 and a connecting plate 4. The windward side 1 and the leeward side 2 both include columns 3, cross bars 31 and impellers 32. At least two columns 3 are provided, each of which is vertically arranged and fixedly connected to the ground. A plurality of cross bars 31 are provided between adjacent columns 3, each of which is perpendicular to the columns 3, and both ends of the cross bars 31 are fixedly connected to the two columns 3, respectively. A plurality of impellers 32 are provided on each cross bar 31, and each impeller 32 is fixedly connected to a rotating shaft 33 (such as Figure 5 As shown in the figure), the rotating shaft 33 is rotatably connected with the cross bar 31, and each impeller 32 is provided with a limiter 9, which is installed on the rotating shaft 33 to limit the rotation direction of the impeller 32, and the impellers 32 on adjacent cross bars rotate in opposite directions; the connecting plate 4 is arranged between the column 3 on the windward side 1 and the column 3 on the leeward side 2, and the two ends of the connecting plate 4 are fixedly connected to the two columns 3 respectively, and a cleaning device 5 is arranged between adjacent connecting plates 4, and the cleaning device 5 is used to clean the deposited wind sand between the windward side 1 and the leeward side 2, and the cross bar 31 on the leeward side 2 is arranged at the gap leaked between the two adjacent cross bars 31 on the windward side 1 so as to maximize the use of wind sand and enhance the blocking effect of the sand retaining wall on wind sand. In this embodiment, four cross bars 31 are arranged on the windward side 1, and three cross bars 31 are arranged on the leeward side 2. The three cross bars 31 on the leeward side 2 are arranged at the gap between the four cross bars 31 on the windward side 1.

[0021] Reference Figure 2 and Figure 4The cleaning device 5 includes a driving member 51, a reciprocating screw 52, ​​a slider 53 and a sand cleaning member 54. The driving member 51 is fixedly connected to the connecting plate 4. Both ends of the reciprocating screw 52 are rotatably connected to the connecting plate 4. The driving member 51 is connected to the reciprocating screw 52 to drive the reciprocating screw 52 to rotate. The slider 53 is arranged between the two connecting plates 4. The slider 53 is threadedly connected to the reciprocating screw 52. The slider 53 is fixedly connected to the sand cleaning member 54. The rotation of the reciprocating screw 52 is used to drive the slider 53 and the sand cleaning member 54 to rotate between the two plates. The slider 53 slides between the connecting plates 4; the slider 53 is also provided with a guide rod 6, the two ends of the guide rod 6 are respectively fixedly connected to the two connecting plates 4, and the guide rod 6 is slidably connected to the slider 53; in this embodiment, the sand cleaning piece 54 includes a middle plate, a push plate and a connecting rod 82, the middle plate is fixedly connected to the slider 53, the push plate includes a left push plate and a right push plate, the left push plate and the right push plate are symmetrically arranged on both sides of the middle plate, and connecting rods 82 are arranged between the left push plate and the right push plate and the middle plate, and the two ends of the connecting rod 82 are respectively fixedly connected to the middle plate and the push plate.

[0022] Reference Figure 4 and Figure 5 The driving member 51 is provided with a power supply device 7, which includes a micro-generator 71 and a battery 72. Each rotating shaft 33 is provided with a micro-generator 71, the rotor of the micro-generator 71 is fixedly connected to the rotating shaft 33, the micro-generator 71 is fixedly connected to the cross bar 31, the battery 72 is fixedly connected to the column 3, each micro-generator 71 is electrically connected to the battery 72, and the battery 72 is electrically connected to the driving member 51; a rectifier is provided between the micro-generator 71 and the battery 72, the rectifier is electrically connected to the micro-generator 71 and the battery 72, and the rectifier is used to convert the variable direct current generated by wind power generation into stable direct current; a connecting device 8 is provided between the micro-generator 71 and the cross bar 31, the connecting device 8 includes a bearing plate 81 and a support rod, the bearing plate 81 is fixedly connected to the cross bar 31, the bearing plate 81 is fixedly connected to the micro-generator 71, and the two ends of the support rod are respectively fixed to the cross bar 31 and the end of the bearing plate 81 away from the cross bar 31.

[0023] Reference Figure 3 and Figure 5 The limiter 9 is arranged at the end of the rotating shaft 33 passing through the cross bar 31 away from the impeller 32. The limiter 9 includes a fixed ratchet 91, a sliding ratchet 92 and an elastic member 93. The fixed ratchet 91 is fixedly connected to the end of the rotating shaft 33 away from the impeller 32. The sliding ratchet 92 is arranged between the fixed ratchet 91 and the cross bar 31. The sliding ratchet 92 is sleeved on the outside of the rotating shaft 33. The sliding ratchet 92 is slidably connected to the rotating shaft 33. The elastic member 93 is arranged between the sliding ratchet 92 and the cross bar 31. The elastic member 93 is sleeved on the outside of the rotating shaft 33. The two ends of the elastic member 93 are respectively fixedly connected to the sliding ratchet 92 and the cross bar 31.

[0024] Reference Figure 3and Figure 5 The elastic member 93 is sleeved with a telescopic sleeve 10 on the outside, and the telescopic sleeve 10 includes a fixed sleeve 101 and a sliding sleeve 102. The fixed sleeve 101 is fixedly connected to the cross bar 31, and the sliding sleeve 102 is fixedly connected to the sliding ratchet 92. The end of the sliding sleeve 102 away from the sliding ratchet 92 is inserted into the fixed sleeve 101, and the sliding sleeve 102 is slidably connected to the fixed sleeve 101; a limit assembly 20 is arranged between the sliding sleeve 102 and the fixed sleeve 101, and the limit assembly 20 includes a limit bar 2 01 and a limit groove 202, the limit strip 201 is fixedly connected to the sliding sleeve 102, the limit groove 202 is opened on the inner wall of the fixed sleeve 101, the limit strip 201 is inserted into the limit groove 202, and the limit strip 201 is slidably connected to the limit groove 202; a cleaning brush 30 is arranged between the fixed sleeve 101 and the sliding sleeve 102, the cleaning brush 30 is fixedly connected to the fixed sleeve 101, and the cleaning brush 30 is used to clean the sand and dust on the outer wall of the sliding sleeve 102 to prevent the sand and dust from entering the telescopic sleeve 10.

[0025] Reference Figure 6 A mounting assembly 40 is provided between the cross bar 31 and the column 3. The mounting assembly 40 is used to fix the cross bar 31 to the column 3. The mounting assembly 40 includes a mounting block 401 and a locking bolt 402. A first clamping groove is provided on the mounting block 401, and a second clamping groove is provided on the column 3. The first clamping groove is clamped with the column 3, and the second clamping groove is clamped with the mounting block 401. The locking bolt 402 passes through the side wall of the first clamping groove and is threadedly connected with the column 3; an anti-loosening gasket 403 is provided between the locking bolt 402 and the column 3, and the anti-loosening gasket 403 is used to prevent the locking bolt 402 from loosening; a mounting rod 50 is provided at the bottom end of the column 3, one end of the mounting rod 50 is fixedly connected to the column 3, and the other end is provided with a tip, and the tip is inserted into the ground.

[0026] The implementation principle of the name of the embodiment of the present application is: when using the sand retaining wall, first insert one end of the mounting rod 50 into the ground, then move the column 3 to be fixedly connected to the mounting rod 50, then move the cross bar 31 between the two columns 3, and then move the cross bar 31 to drive the first clamping groove to engage with the second clamping groove, and then pass the locking bolt 402 through the side wall of the first clamping groove and threadedly connect it with the column 3, then fix the cross bar 31 to the column 3, install several cross bars 31 in turn, and then install the impeller 32 on the cross bar 31, and the rotating shaft 33 of the impeller 32 passes through the cross bar 31 and is fixedly connected to the fixed ratchet 91 of the limiter 9.

[0027] When wind passes through the impeller 32, the wind drives the impeller 32 to rotate, and the rotation of the impeller 32 drives the rotating shaft 33 to rotate. The rotation of the rotating shaft 33 drives the fixed ratchet 91 to rotate. When the fixed ratchet 91 rotates, it drives the sliding ratchet 92 to slide along the rotating shaft 33. The sliding ratchet 92 drives the elastic member 93 to deform, so that the fixed ratchet 91 can rotate. At the same time, the sliding ratchet 92 drives the sliding sleeve 102 to slide in the fixed sleeve 101, and the sliding sleeve 102 drives the limiting strip 201 to slide in the limiting groove 202. The cleaning brush 30 Clean the wind and sand on the surface of the sliding sleeve 102; the airflow disturbance generated by the rotation of the impeller 32 reduces the speed of the wind and sand and reduces the ability of the wind and sand to carry sand and dust. The limiter 9 is used to limit the rotation direction of the impeller 32. At the same time, the impellers 32 on adjacent cross bars 31 rotate in opposite directions, making the turbulence generated by the impeller 32 more chaotic, further reducing the wind speed of the wind and sand, achieving good sand blocking performance, and at the same time using the turbulence to pre-disturb and slow down the wind and sand, reducing the wind speed when the wind and sand contact the sand retaining wall, thereby increasing the service life of the sand retaining wall.

[0028] The rotation of the rotating shaft 33 drives the micro generator 71 to rotate and generate electric energy. The electric energy is rectified by the rectifier and stored in the battery 72. When it is necessary to clean the wind sand deposited between the windward side 1 and the leeward side 2, the electric energy in the battery 72 is used to start the driving member 51 to rotate. The rotation of the driving member 51 drives the reciprocating screw 52 to rotate. The reciprocating screw 52 drives the slider 53 to slide along the length direction of the guide rod 6. The slider 53 drives the sand cleaning member 54 to reciprocate between the two columns 3 to clean the accumulated sand at the bottom of the sand retaining wall, so as to prevent the sand retaining wall from being buried by the accumulated sand and affecting the service life of the sand retaining wall.

[0029] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A double-layer wheeled sand retaining wall, characterized in that: The invention comprises a windward side (1), a leeward side (2) and a connecting plate (4), wherein the windward side (1) and the leeward side (2) both comprise a column (3), a cross bar (31) and an impeller (32), wherein at least two columns (3) are provided, each column (3) is vertically arranged and fixedly connected to the ground, a plurality of cross bars (31) are provided between adjacent columns (3), each cross bar (31) is perpendicular to the columns (3), two ends of the cross bar (31) are respectively fixedly connected to the two columns (3), a plurality of impellers (32) are provided on each cross bar (31), each impeller (32) is fixedly connected to a rotating shaft (33), the rotating shaft (33) is rotatably connected to the cross bar (31), and a limiter (9) is provided on each impeller (32), the limiter (9) is installed on the rotating shaft (33) and is used to limit the rotation direction of the impeller (32), and the impellers (32) on adjacent cross bars rotate in opposite directions; The connecting plate (4) is arranged between the upright posts (3) on the windward side (1) and the upright posts (3) on the leeward side (2); the two ends of the connecting plate (4) are respectively fixedly connected to the two upright posts (3); a cleaning device (5) is arranged between adjacent connecting plates (4); the cleaning device (5) is used to clean the wind-blown sand deposited between the windward side (1) and the leeward side (2).

2. A double-layer wheeled sand retaining wall according to claim 1, characterized in that: The cleaning device (5) comprises a driving member (51), a reciprocating screw (52), a sliding block (53) and a sand cleaning member (54); the driving member (51) is fixedly connected to the connecting plate (4); both ends of the reciprocating screw (52) are respectively rotatably connected to the connecting plate (4); the driving member (51) is connected to the reciprocating screw (52) for driving the reciprocating screw (52) to rotate; the sliding block (53) is arranged between the two connecting plates (4); the sliding block (53) is threadedly connected to the reciprocating screw (52); the sliding block (53) is fixedly connected to the sand cleaning member (54); the reciprocating screw (52) rotates for driving the sliding block (53) and the sand cleaning member (54) to slide between the two connecting plates (4).

3. A double-layer wheeled sand retaining wall according to claim 2, characterized in that: The slider (53) is also provided with a guide rod (6), the two ends of the guide rod (6) are respectively fixedly connected to the two connecting plates (4), and the guide rod (6) is slidably connected to the slider (53).

4. A double-layer wheeled sand retaining wall according to claim 2, characterized in that: The driving member (51) is provided with a power supply device (7), the power supply device (7) comprising a micro generator (71) and a storage battery (72), each rotating shaft (33) is provided with a micro generator (71), the rotor of the micro generator (71) is fixedly connected to the rotating shaft (33), the micro generator (71) is fixedly connected to the cross bar (31), the storage battery (72) is fixedly connected to the column (3), each micro generator (71) is electrically connected to the storage battery (72), and the storage battery (72) is electrically connected to the driving member (51).

5. A double-layer wheeled sand retaining wall according to claim 4, characterized in that: A rectifier is provided between the micro-generator (71) and the storage battery (72), the rectifier is electrically connected to both the micro-generator (71) and the storage battery (72), and the rectifier is used to convert the variable direct current generated by wind power generation into stable direct current.

6. A double-layer wheeled sand retaining wall according to claim 4, characterized in that: A connecting device (8) is provided between the micro-generator (71) and the crossbar (31), the connecting device (8) comprising a bearing plate (81) and a support rod, the bearing plate (81) is fixedly connected to the crossbar (31), the bearing plate (81) is fixedly connected to the micro-generator (71), and two ends of the support rod are respectively fixed to the crossbar (31) and one end of the bearing plate (81) away from the crossbar (31).

7. A double-layer wheeled sand retaining wall according to claim 1, characterized in that: The limiter (9) is arranged at one end of the rotating shaft (33) passing through the cross bar (31) and away from the impeller (32). The limiter (9) comprises a fixed ratchet (91), a sliding ratchet (92) and an elastic member (93). The fixed ratchet (91) is fixedly connected to one end of the rotating shaft (33) away from the impeller (32). The sliding ratchet (92) is arranged between the fixed ratchet (91) and the cross bar (31). The sliding ratchet (92) is sleeved on the outside of the rotating shaft (33). The sliding ratchet (92) is slidably connected to the rotating shaft (33). The elastic member (93) is arranged between the sliding ratchet (92) and the cross bar (31). The elastic member (93) is sleeved on the outside of the rotating shaft (33). Two ends of the elastic member (93) are respectively fixedly connected to the sliding ratchet (92) and the cross bar (31).

8. A double-layer wheeled sand retaining wall according to claim 7, characterized in that: A telescopic sleeve (10) is sleeved on the outer side of the elastic member (93), and the telescopic sleeve (10) comprises a fixed sleeve (101) and a sliding sleeve (102). The fixed sleeve (101) is fixedly connected to the cross bar (31), and the sliding sleeve (102) is fixedly connected to the sliding ratchet (92). One end of the sliding sleeve (102) away from the sliding ratchet (92) is inserted into the fixed sleeve (101), and the sliding sleeve (102) is slidably connected to the fixed sleeve (101).

9. A double-layer wheeled sand retaining wall according to claim 8, characterized in that: A limiting assembly (20) is arranged between the sliding sleeve (102) and the fixed sleeve (101), the limiting assembly (20) comprising a limiting strip (201) and a limiting groove (202), the limiting strip (201) being fixedly connected to the sliding sleeve (102), the limiting groove (202) being provided on the inner wall of the fixed sleeve (101), the limiting strip (201) being inserted into the limiting groove (202), and the limiting strip (201) being slidably connected to the limiting groove (202).

10. A double-layer wheeled sand retaining wall according to claim 9, characterized in that: A cleaning brush (30) is provided between the fixed sleeve (101) and the sliding sleeve (102). The cleaning brush (30) is fixedly connected to the fixed sleeve (101). The cleaning brush (30) is used to clean sand and dust on the outer wall of the sliding sleeve (102) to prevent sand and dust from entering the telescopic sleeve (10).

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