Municipal engineering road maintenance device

Abstract

The utility model discloses a municipal engineering road maintenance device which comprises a U-shaped base, a mounting seat is fixedly connected to the top of the U-shaped base, an asphalt groove is formed in the left side of the top of the mounting seat, a mounting groove is formed in the right side of the top of the mounting seat, and a cover plate matched with the asphalt groove and the mounting groove is fixedly connected to the top of the mounting seat. The cover plate shields the top of the asphalt groove and the top of the mounting groove, a first groove is formed in the bottom of the mounting base, an annular pipe is arranged in the first groove, and the outer side of the annular pipe is fixedly sleeved with a blocking pipe. Through the arrangement of a series of structures, dust and impurities in cracks can be blown, cleaned, filtered and collected in a blowing and sucking mode before asphalt is filled, the influence of the dust and impurities on asphalt filling is reduced, the cracks can be directly filled with asphalt for repairing operation after cleaning, and the repairing efficiency is improved. The whole device does not need to be moved again, and personnel operation is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of road maintenance equipment, in particular to a municipal engineering road maintenance device. Background Art

[0002] Municipal engineering road maintenance equipment is mostly used in road maintenance. For example, when cracks appear on the road surface, they need to be filled to ensure that vehicles can pass normally. The maintenance device of municipal engineering roads in the existing technology needs to use asphalt to fill cracks in the road. However, before filling, there will be a lot of dust and impurities in the cracks. If the cracks are filled without cleaning them first, the effect of asphalt filling the cracks will be unsatisfactory. After searching, the application number: 202321763823.0 discloses a municipal engineering road maintenance device, including a main body, an auxiliary body and a shock-absorbing support body. The auxiliary body is located outside the main body, and the shock-absorbing support body The structure is located inside the main body, and the main body includes an equipment body, an asphalt addition pipe and a clean water addition pipe. The asphalt addition pipe is fixedly installed at the upper end of the equipment body, and the clean water addition pipe is fixedly installed at the upper end of the equipment body. The main body also includes a water pumping and cleaning component, a clean water tank, an asphalt cylinder, an electric heating plate and a connecting pipe made of high-temperature resistant material. The clean water tank is fixedly installed inside the equipment body, and the asphalt cylinder is fixedly installed at the left end of the clean water tank. The municipal engineering road maintenance device allows people to clean the dirt and garbage around the road cracks before filling the road cracks, which can make the asphalt filling effect of the road cracks better.

[0003] The municipal engineering road maintenance device disclosed in the above patent can clean the dirt and garbage around the cracks by spraying water, but it cannot effectively clean the dust and impurities inside the cracks. If water flushing is directly used, the cracks will be filled with water, which will affect the subsequent asphalt filling. In response to the above problems, we have redesigned and proposed a municipal engineering road maintenance device. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a municipal engineering road maintenance device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A municipal engineering road maintenance device comprises a U-shaped base, the top of the U-shaped base is fixedly connected to a mounting seat, an asphalt groove is provided on the left side of the top of the mounting seat, and a mounting groove is provided on the right side of the top of the mounting seat, and a cover plate that matches the asphalt groove and the mounting groove is fixedly connected to the top of the mounting seat, and the cover plate blocks the top of the asphalt groove and the mounting groove, and a first groove is provided at the bottom of the mounting seat, an annular tube is provided in the first groove, and a sealing tube is fixedly sleeved on the outer side of the annular tube, and a suction and filtering mechanism is fixedly connected between the top inner wall and the bottom inner wall of the mounting groove, and the suction and filtering mechanism is used to generate a suction force and filter and collect dust and impurities, and a first connecting mechanism connected to the inside of the mounting groove is embedded and fixed on the top inner wall of the first groove, and the sealing tube is fixedly sleeved on the first connecting mechanism, and the connection between the mounting groove and the inside of the annular tube is realized through the first connecting mechanism, and the first groove The top inner wall is fixedly connected with an extraction mechanism connected to the interior of the asphalt tank, and the extraction mechanism is used to extract the asphalt inside the asphalt tank. A connecting box is fixedly connected to the top inner wall of the first tank, and the connecting box is fixedly sleeved on the extraction mechanism. A second connecting mechanism connected to the interior of the connecting box is embedded and fixed on the bottom inner wall of the mounting groove, and the connection between the mounting groove and the connecting box is achieved through the second connecting mechanism. The bottom of the connecting box is fixed with a vertical connecting mechanism, and the vertical connecting mechanism is fixedly sleeved with a shielding cover fixedly connected to the bottom of the annular tube. The bottom of the annular tube is fixed with multiple inclined suction pipes, and the shielding cover is fixedly sleeved on multiple suction pipes. The bottom of the connecting box is fixedly connected to a multi-stage electric telescopic rod, and the bottom end of the output shaft of the multi-stage electric telescopic rod is fixedly connected to the top of the annular tube. The multi-stage electric telescopic rod is used to drive the annular tube to move vertically.

[0007] Preferably, the suction and filtering mechanism includes a high-pressure extraction pump fixedly connected between the front inner wall, the rear inner wall and the bottom inner wall of the installation groove. The right side of the high-pressure extraction pump is set as an extraction end and is provided with an L-shaped filter screen. The L-shaped filter screen is used to filter and block dust and impurities. The high-pressure extraction pump is used to generate suction force. The L-shaped filter screen is movably mounted in the installation groove. The top of the L-shaped filter screen is fixedly connected to a connecting block. The cover plate is movably mounted on the connecting block. The top of the connecting block is fixedly connected to a pull ring. The L-shaped filter screen can be removed from the inside of the installation groove by pulling the pull ring and cooperating with the connecting block.

[0008] Preferably, the first connecting mechanism includes a first hose embedded and fixed on the inner wall of the top of the first groove, the top of the first hose is connected to the interior of the installation groove, the top of the first hose is located on the right side of the L-shaped filter, the bottom end of the first hose is connected and fixed with an L-shaped tube, the sealing tube is fixedly mounted on the L-shaped tube, and the L-shaped tube is connected to the interior of the annular tube.

[0009] Preferably, the extraction mechanism includes an asphalt extraction pump fixedly connected to the inner wall of the top of the first tank, the extraction end of the asphalt extraction pump extends into the asphalt tank and is connected to the interior of the asphalt tank, the asphalt extraction pump is used to extract the asphalt inside the asphalt tank, and the discharge end of the asphalt extraction pump is connected to and fixed with a first one-way valve with an outlet on the right side. The setting of the first one-way valve can prevent the gas inside the connecting box from entering the interior of the asphalt extraction pump. The connecting box is fixedly mounted on the discharge end of the asphalt extraction pump, and the first one-way valve is located inside the connecting box.

[0010] Preferably, the second connecting mechanism includes a first connecting pipe embedded and fixed on the inner wall of the bottom of the mounting groove. The first connecting pipe is located on the left side of the high-pressure extraction pump. The left side of the high-pressure extraction pump is the discharge end. The bottom end of the first connecting pipe extends into the connecting box and is fixedly connected to a second one-way valve with the bottom as an outlet. The second one-way valve is located in the connecting box. The setting of the second one-way valve can prevent the asphalt inside the connecting box from entering the first connecting pipe.

[0011] Preferably, the vertical connecting mechanism includes a second hose fixed to the bottom of the connecting box, the bottom end of the second hose is connected to and fixed with a second connecting pipe, the shielding cover and the annular tube are fixedly mounted on the second connecting pipe, the bottom end of the second connecting pipe is flush with the bottom end of the shielding cover, and air is blown into the crack through the second connecting pipe, and asphalt is filled into the crack.

[0012] Preferably, the shielding cover is made of transparent material, and the bottom of the shielding cover is annularly embedded with multiple supporting balls. The shielding cover passes through the interior of the U-shaped base and extends to the bottom of it. Two locking universal wheels are rotatably installed on both sides of the bottom of the U-shaped base. The right bottom of the mounting seat is fixedly connected to an inclined U-shaped handle, and the entire device can be moved by the locking universal wheels and the U-shaped handle.

[0013] Compared with the existing technology, the beneficial effects of the utility model are:

[0014] 1. The suction and filtering mechanism, the mounting groove, the first connecting mechanism, the second connecting mechanism, the vertical connecting mechanism, the annular pipe, the suction pipe and the shielding cover cooperate to blow, clean and filter the dust and impurities inside the cracks before filling with asphalt. The shielding cover also forms a dust barrier on the upper part, effectively reducing the impact of a large amount of dust and impurities on the environment and improving the use effect.

[0015] 2. Through the coordination of the asphalt tank, extraction mechanism, connecting box and vertical connecting mechanism, asphalt can be directly filled into the cracks for repair work after cleaning, without the need to move the entire device again, which is convenient for personnel to operate;

[0016] Through the arrangement of a series of structures, the utility model can clean and filter the dust and impurities inside the cracks by blowing and sucking before filling asphalt, thereby reducing the impact of dust and impurities on the filling asphalt. After cleaning, asphalt can be directly filled into the cracks for repair work without moving the entire device again, which is convenient for personnel to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a municipal engineering road maintenance device proposed by the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure viewed from above;

[0019] Figure 3 This is a schematic diagram of the main cross-sectional structure of a municipal engineering road maintenance device proposed by the utility model;

[0020] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part A.

[0021] In the figure: 100, mounting base; 101, cover plate; 102, asphalt tank; 103, U-shaped base; 1, high-pressure extraction pump; 2, L-shaped filter; 3, first hose; 4, shielding cover; 5, annular pipe; 6, suction pipe; 7, second connecting pipe; 8, L-shaped pipe; 9, multi-stage electric telescopic rod; 10, second hose; 11, first tank; 12, asphalt extraction pump; 13, connecting box; 14, first one-way valve; 15, second one-way valve; 16, mounting tank; 17, first connecting pipe. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Reference Figure 1-4A municipal engineering road maintenance device includes a U-shaped base 103, wherein two locking universal wheels are rotatably installed on both sides of the bottom of the U-shaped base 103, the top of the U-shaped base 103 is fixedly connected to a mounting base 100, and the right bottom of the mounting base 100 is fixedly connected to an inclined U-shaped handle, and the entire device can be moved by the locking universal wheels and the U-shaped handle, an asphalt groove 102 is opened on the left side of the top of the mounting base 100, a mounting groove 16 is opened on the right side of the top of the mounting base 100, and the top of the mounting base 100 is fixedly connected to The cover plate 101 matches the asphalt tank 102 and the mounting groove 16, and the cover plate 101 covers the top of the asphalt tank 102 and the mounting groove 16. An asphalt adding pipe is fixed on the left side of the top of the cover plate 101. The asphalt adding pipe is connected to the interior of the asphalt tank 102. Asphalt is added to the interior of the asphalt tank 102 through the asphalt adding pipe. A plug is provided on the threaded sleeve of the asphalt adding pipe. The plug is used to seal the asphalt adding pipe. The bottom of the mounting seat 100 is provided with a first groove 11. The first groove 11 is provided with an annular pipe 5. The annular pipe 5 The outer fixed sleeve is provided with a blocking tube, which is used to block the annular tube 5. A suction filtering mechanism is fixedly connected between the top inner wall and the bottom inner wall of the mounting groove 16. The suction filtering mechanism includes a high-pressure extraction pump 1 fixedly connected between the front inner wall, the rear inner wall and the bottom inner wall of the mounting groove 16. The right side of the high-pressure extraction pump 1 is set as an extraction end and is provided with an L-shaped filter screen 2. The L-shaped filter screen 2 is used to filter and block dust and impurities. The high-pressure extraction pump 1 is used to generate suction force. The L-shaped filter screen 2 is movably sleeved in the mounting groove 16. The front side, rear side and bottom of the middle L-shaped filter screen 2 are in active contact with the front inner wall, rear inner wall and bottom inner wall of the mounting groove 16 respectively. The top of the L-shaped filter screen 2 is fixedly connected with a connecting block. The cover plate 101 is movably sleeved on the connecting block. A through hole is opened on the right side of the top of the cover plate 101. The inner wall of the through hole is in active contact with the outer side of the connecting block. The through hole is used for allowing the L-shaped filter screen 2 to pass through. The top of the connecting block is fixedly connected with a pull ring. By pulling the pull ring and cooperating with the connecting block, the L-shaped filter screen 2 can be removed from the mounting groove 16 and the through hole.

[0024] A first communication mechanism connected to the interior of the mounting groove 16 is embedded and fixed on the top inner wall of the first groove 11, and the blocking tube is fixedly sleeved on the first communication mechanism. The first communication mechanism includes a first hose 3 embedded and fixed on the top inner wall of the first groove 11, and the top of the first hose 3 is connected to the interior of the mounting groove 16, wherein a first embedding hole for fixing the first hose 3 is opened on the bottom inner wall of the mounting groove 16, and the top of the first hose 3 is located on the right side of the L-shaped filter 2, and the bottom end of the first hose 3 is connected and fixed with an L-shaped tube 8, and the blocking tube is fixedly sleeved on the L-shaped tube 8, wherein a second embedding hole for fixing the L-shaped tube 8 is opened on the right inner wall of the blocking tube, and the L-shaped tube 8 is connected to the interior of the annular tube 5;

[0025] An extraction mechanism connected to the interior of the asphalt tank 102 is fixedly connected to the top inner wall of the first tank 11. A connecting box 13 is fixedly connected to the top inner wall of the first tank 11, wherein the extraction mechanism includes an asphalt extraction pump 12 fixedly connected to the top inner wall of the first tank 11, the extraction end of the asphalt extraction pump 12 extends into the asphalt tank 102 and is connected to the interior of the asphalt tank 102, the asphalt extraction pump 12 is used to extract asphalt from the asphalt tank 102, and the discharge end of the asphalt extraction pump 12 is connected and fixed with a first one-way valve 14 with the right side as the outlet. The provision of the first one-way valve 14 can prevent the gas inside the connecting box 13 from entering the interior of the asphalt extraction pump 12. The connecting box 13 is fixedly sleeved on the discharge end of the asphalt extraction pump 12, and the first one-way valve 14 is located in the connecting box 13;

[0026] A second communication mechanism connected to the interior of the communication box 13 is embedded and fixed on the bottom inner wall of the mounting groove 16. The second communication mechanism includes a first communication pipe 17 embedded and fixed on the bottom inner wall of the mounting groove 16. The first communication pipe 17 is located on the left side of the high-pressure extraction pump 1. The left side of the high-pressure extraction pump 1 is the discharge end. The bottom end of the first communication pipe 17 extends into the communication box 13 and is fixedly connected to a second one-way valve 15 with the bottom as an outlet. The second one-way valve 15 is located in the communication box 13. The provision of the second one-way valve 15 can prevent the asphalt inside the communication box 13 from entering the interior of the first communication pipe 17.

[0027] A vertical communication mechanism is fixed to the bottom of the communication box 13, wherein the vertical communication mechanism includes a second hose 10 fixed to the bottom of the communication box 13. The bottom end of the second hose 10 is fixed to a second communication pipe 7, through which air is blown into the crack and asphalt is filled into the crack.

[0028] The second connecting pipe 7 is fixedly sleeved with a shielding cover 4 fixedly connected to the bottom of the annular tube 5. The bottom end of the second connecting pipe 7 is flush with the bottom end of the shielding cover 4. The shielding cover 4 is made of transparent material. The shielding cover 4 is used to block dust when cleaning and reduce the dust from floating outward. The bottom of the shielding cover 4 is annular and embedded with multiple supporting balls. The setting of the supporting balls can prevent the shielding cover 4 from contacting the ground when it moves downward to the lowest point. The shielding cover 4 passes through the interior of the U-shaped base 103 and extends below it. The annular tube 5 is fixedly sleeved on the second connecting pipe 7. The bottom of the annular tube 5 is connected and fixed with multiple inclined suction pipes. Tube 6, the shielding cover 4 is fixedly sleeved on multiple suction pipes 6, the bottom of the connecting box 13 is fixedly connected to the multi-stage electric telescopic rod 9, the bottom end of the output shaft of the multi-stage electric telescopic rod 9 is fixedly connected to the top of the annular tube 5, and the multi-stage electric telescopic rod 9 is used to drive the annular tube 5 to move vertically; the utility model is set up through a series of structures, which can blow and clean and filter and collect dust and impurities inside the cracks by blowing and sucking before filling asphalt, thereby reducing the impact of dust and impurities on the filling asphalt, and can directly fill asphalt into the cracks after cleaning for repair work, without moving the entire device again, which is convenient for personnel to operate.

[0029] Working principle: Add asphalt sealant to the asphalt tank 102 in advance, and the entire device can be moved by the U-shaped handle and four universal wheels with locks. After moving to the designated location, observe the position of the second connecting pipe 7 through the shielding cover 4. When the second connecting pipe 7 is aligned with the crack in the road, stop moving the entire device, and then start the multi-stage electric telescopic rod 9 in the positive direction. The output shaft of the multi-stage electric telescopic rod 9 drives the annular tube 5 to move downward, and the annular tube 5 drives the shielding cover 4 and the second connecting pipe 7 to move downward. While the second connecting pipe 7 moves downward, the second hose 10 is stretched. The shielding cover 4 drives multiple supporting balls to move downward until they come into contact with the ground. At this time, the second connecting pipe 7 is located at the crack, and then the high-pressure extraction pump 1 is turned on. The high-pressure extraction pump 1 extracts gas through the first hose 3, L-shaped tube 8, annular tube 5 and multiple suction pipes 6 in sequence. The gas is discharged in sequence through the first connecting pipe 17, the second one-way valve 15, the connecting box 13, the second hose 10 and the second connecting pipe 7 to blow the gas into the crack. Under the blowing of the gas, the impurities and dust inside the crack can be blown out. At the same time, the suction force inside the suction pipe 6 sucks the blown dust and impurities. Under the suction force, the gas containing dust and impurities enters the installation groove 16 through the annular pipe 5, the L-shaped pipe 8 and the first hose 3 in sequence. The gas passes through the L-shaped filter 2 and is discharged into the second connecting pipe 7 again. The L-shaped filter 2 blocks the dust and impurities inside it, thereby achieving the effect of blowing out the dust and impurities in the crack and filtering and collecting the blown dust and impurities at the same time. In the process of blowing and cleaning, the shielding cover 4 forms a dust-blocking effect on the upper part, reducing the impact of a large amount of dust and impurities on the environment, thereby improving the use effect.

[0030] After the dust and impurities are blown away, the high-pressure extraction pump 1 is turned off, and the asphalt extraction pump 12 is then turned on. The asphalt extraction pump 12 extracts asphalt from the asphalt tank 102. The extracted asphalt is discharged into the crack through the first one-way valve 14, the connecting box 13, the second hose 10, and the second connecting pipe 7 in sequence, thereby achieving the effect of repairing the crack.

[0031] After filling and repairing, the multi-stage electric telescopic rod 9 is started in reverse, and the output shaft of the multi-stage electric telescopic rod 9 drives the shielding cover 4 to move upward and reset through the annular tube 5, and the entire device can be moved to the cleaning location. By adding cleaning water to the asphalt tank 102 and extracting with the asphalt extraction pump 12, the first one-way valve 14, the connecting box 13, the second hose 10 and the second connecting pipe 7 can be cleaned in turn. By cleaning, the blockage of the second connecting pipe 7 and the second hose 10 can be effectively reduced without affecting the next use.

[0032] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A municipal engineering road maintenance device, comprising a U-shaped base (103), the top of which is fixedly connected to a mounting seat (100), characterized in that: An asphalt groove (102) is provided on the left side of the top of the mounting seat (100), and an installation groove (16) is provided on the right side of the top of the mounting seat (100). A cover plate (101) that matches the asphalt groove (102) and the installation groove (16) is fixedly connected to the top of the mounting seat (100). A first groove (11) is provided at the bottom of the mounting seat (100). An annular tube (5) is provided in the first groove (11). A sealing tube is fixedly sleeved on the outer side of the annular tube (5). A suction filtering mechanism is fixedly connected between the top inner wall and the bottom inner wall of the installation groove (16). A first communication mechanism that is connected to the inside of the installation groove (16) is embedded and fixed on the top inner wall of the first groove (11). The sealing tube is fixedly sleeved on the first communication mechanism. The top inner wall of the first groove (11) is fixedly connected to the asphalt groove. (102) An internally connected extraction mechanism, a connecting box (13) is fixedly connected to the top inner wall of the first groove (11), the connecting box (13) is fixedly sleeved on the extraction mechanism, a second connecting mechanism connected to the inside of the connecting box (13) is embedded and fixed on the bottom inner wall of the mounting groove (16), the bottom of the connecting box (13) is connected and fixed with a vertical connecting mechanism, a shielding cover (4) fixedly sleeved on the vertical connecting mechanism and connected to the bottom of the annular tube (5), the bottom of the annular tube (5) is connected and fixed with a plurality of inclined suction pipes (6), the shielding cover (4) is fixedly sleeved on the plurality of suction pipes (6), the bottom of the connecting box (13) is fixedly connected with a multi-stage electric telescopic rod (9), the bottom end of the output shaft of the multi-stage electric telescopic rod (9) is fixedly connected to the top of the annular tube (5).

2. A municipal engineering road maintenance device according to claim 1, characterized in that: The suction filtering mechanism comprises a high-pressure extraction pump (1) fixedly connected between the front inner wall, the rear inner wall and the bottom inner wall of the installation groove (16); the right side of the high-pressure extraction pump (1) is set as an extraction end and is provided with an L-shaped filter screen (2); the L-shaped filter screen (2) is movably sleeved in the installation groove (16); the top of the L-shaped filter screen (2) is fixedly connected to a connection block; the cover plate (101) is movably sleeved on the connection block; the top of the connection block is fixedly connected to a pull ring.

3. A municipal engineering road maintenance device according to claim 2, characterized in that: The first communication mechanism comprises a first hose (3) embedded and fixed on the inner wall of the top of the first groove (11); the top end of the first hose (3) is connected to the interior of the installation groove (16); the top end of the first hose (3) is located on the right side of the L-shaped filter screen (2); the bottom end of the first hose (3) is connected and fixed with an L-shaped tube (8); the blocking tube is fixedly sleeved on the L-shaped tube (8); and the L-shaped tube (8) is connected to the interior of the annular tube (5).

4. A municipal engineering road maintenance device according to claim 3, characterized in that: The extraction mechanism comprises an asphalt extraction pump (12) fixedly connected to the inner wall of the top of the first tank (11); the extraction end of the asphalt extraction pump (12) extends into the asphalt tank (102) and is connected to the interior of the asphalt tank (102); the discharge end of the asphalt extraction pump (12) is connected to and fixed with a first one-way valve (14) with the right side as an outlet; a connecting box (13) is fixedly sleeved on the discharge end of the asphalt extraction pump (12); and the first one-way valve (14) is located in the connecting box (13).

5. A municipal engineering road maintenance device according to claim 4, characterized in that: The second connecting mechanism comprises a first connecting pipe (17) embedded and fixed on the inner wall of the bottom of the mounting groove (16); the first connecting pipe (17) is located on the left side of the high-pressure extraction pump (1); the left side of the high-pressure extraction pump (1) is the discharge end; the bottom end of the first connecting pipe (17) extends into the connecting box (13) and is fixedly connected to a second one-way valve (15) with the bottom as an outlet; the second one-way valve (15) is located in the connecting box (13).

6. A municipal engineering road maintenance device according to claim 5, characterized in that: The vertical communication mechanism comprises a second hose (10) connected and fixed to the bottom of the communication box (13); the bottom end of the second hose (10) is connected and fixed to a second communication pipe (7); the shielding cover (4) and the annular pipe (5) are both fixedly sleeved on the second communication pipe (7); the bottom end of the second communication pipe (7) is flush with the bottom end of the shielding cover (4).

7. A municipal engineering road maintenance device according to claim 1, characterized in that: The shielding cover (4) is made of a transparent material, and a plurality of supporting balls are embedded in the bottom of the shielding cover (4) in a ring shape. The shielding cover (4) passes through the interior of the U-shaped base (103) and extends to the bottom thereof. Two universal wheels with locks are rotatably mounted on both sides of the bottom of the U-shaped base (103), and a U-shaped handle arranged obliquely is fixedly connected to the bottom of the right side of the mounting seat (100).

Images