Rust removing and polishing device for steel bar surface cleaning

Abstract

The invention relates to the technical field of building construction, in particular to a derusting and polishing device for steel bar surface cleaning, which comprises a sand blasting machine, at least 2n spray guns are arranged on the inner side of the sand blasting machine, n is an integer greater than or equal to 2, the derusting and polishing device further comprises the spray guns, and the spray guns are assembled to be matched with the sand blasting machine to spray polishing sand out in a fan shape. Polishing sand in the middle of the fan shape is used for polishing and derusting the reinforcing bars; the mechanical energy conversion part is assembled to be used for sucking external air and continuously spraying the external air to the surface of the reinforcing bar for dust removal and cooling by converting the kinetic energy, except for the polishing sand on the two sides of the fan shape, sprayed by the spray gun into mechanical energy for sucking and spraying the air; the spraying gun is matched with the mechanical transduction part to blow off abrasive powder on the surface of a reinforcing bar by using external air, and heat on the surface of the reinforcing bar can be taken away in time in an air cooling mode.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a rust removal and grinding device for cleaning the surface of a steel bar. Background Art

[0002] The rust removal and grinding device for steel bar surface cleaning is effective. It can thoroughly remove rust, oil stains and other impurities on the steel bar surface, improve the bonding strength between the steel bar and concrete, ensure the coordinated work of the two, and enhance the bearing capacity and stability of the structure. At the same time, it can prevent the development of rust, facilitate subsequent anti-corrosion treatment, enhance the corrosion resistance of steel bars, and extend their service life. It can also eliminate surface defects, ensure that the steel bars are evenly stressed, give full play to their mechanical properties, and improve the safety of building structures. In addition, the device can quickly and efficiently clean a large number of steel bars, improve construction quality and efficiency, and reduce rework. In building structures that have requirements for appearance, it can improve the appearance quality of steel bars and make the building more beautiful and tidy.

[0003] Existing rust removal and grinding devices for steel bar surface cleaning usually spray abrasives onto the surface of the steel bar for rust removal. However, the high-frequency impact of the abrasives on the steel bars will cause the temperature of the steel bars to rise sharply, which is very likely to change the metallographic structure inside the steel bars, thereby weakening their strength and toughness, and having a negative impact on the performance of the steel bars in building structures. At the same time, although most of the powder generated by the impact of the abrasives and the steel bars is processed by the dust removal system of the sandblasting machine, some of it will still be adsorbed on the surface of the steel bars. These residual powders not only interfere with the subsequent welding of the steel bars, bonding with concrete and other processing procedures, reduce construction quality, and affect the normal operation of the dust removal system. In addition, the small amount of powder dissipated into the environment forms dust pollution, which not only harms the health of the operators, but also destroys the surrounding ecological environment. It does not meet environmental protection requirements and may face environmental protection penalties, which brings many inconveniences and hidden dangers in actual applications.

[0004] Therefore, a rust removal and grinding device for cleaning the surface of steel bars is needed to solve the problem of how to cool the steel bars after rust removal and remove abrasive powder on the surface of the steel bars. Summary of the invention

[0005] In order to solve the problem that the temperature of the steel bars will increase after the abrasives hit the steel bars frequently, and the powder will be adsorbed on the surface of the steel bars after the abrasives hit the steel bars, the present application provides a rust removal and grinding device for cleaning the surface of steel bars.

[0006] The technical solution of the present invention is: a rust removal and grinding device for cleaning the surface of steel bars, including a sandblasting machine, at least 2n spray guns are arranged on the inner side of the sandblasting machine, wherein n≥2 and is an integer, and also includes a spray gun, which is equipped to cooperate with the sandblasting machine to spray grinding sand in a fan shape, and the grinding sand in the middle of the fan shape is used to grind and remove rust on the steel bars; and a mechanical energy conversion part, which is equipped to convert the kinetic energy of the grinding sand on both sides of the fan shape sprayed by the spray gun into mechanical energy of sucking and spraying air, and then suck the outside air and continuously spray it onto the surface of the steel bar for dust removal and cooling.

[0007] Furthermore, the spray guns are fixedly connected to the bottom of the top wall, the top of the bottom wall and the inner walls on both sides of the sandblasting machine through connecting parts, and the spray guns are linearly arranged at equal distances along the outer side of the steel bars. A material pipe is fixed to one of the input ends of each spray gun, and an air intake pipe is fixed to the other input end of each spray gun. The other end of each material pipe is fixedly connected to the sandblasting machine, a main passage is fixed to one side of the sandblasting machine, and the other end of each air intake pipe is fixedly connected to the main passage and communicated with each other. A dust removal chamber is fixed to one side of the sandblasting machine.

[0008] Furthermore, the mechanical transducer unit includes a turntable, a transmission part, a corrugated tube, an air storage part and a hollow ring, wherein the number of the turntable, the transmission part and the corrugated tube is n; the transmission part is assembled to drive the corrugated tube to contract or stretch by utilizing the force of the rotation of the turntable driven by the abrasive sand sprayed by the spray gun, thereby continuously delivering air to the inside of the hollow ring.

[0009] Furthermore, the transmission part includes a bracket, which is fixed to the inner side of the sandblasting machine. The turntable is rotatably connected to the side of the bracket close to the ash removal chamber, and each turntable and spray gun are symmetrically arranged about the steel bar. A reciprocating screw is fixed to the side of the turntable close to the ash removal chamber, and a pull plate is threadedly connected to the outer side of the reciprocating screw. The pull plate is located on the inner side of the ash removal chamber, and the corrugated tube is fixed to the side of the pull plate away from the sandblasting machine.

[0010] Furthermore, the hollow ring is fixed to a side of the corrugated tube away from the sandblasting machine, and can guide the air of the transmission member to the outside of the steel bar to purge the steel bar.

[0011] Furthermore, the air storage component is equipped to guide the air transported by the corrugated tube to the inner side of the hollow ring, and includes a hexagonal plate, which is fixed to the inner wall of the dust removal chamber on the side away from the sandblasting machine, and an air box is fixed on the side of the hexagonal plate close to the sandblasting machine. The number of air boxes is n, and n groups of air pipes are fixed through the side of the air box close to the sandblasting machine, and two air pipes form a group, and a one-way valve is fixed on the inner side of one end of each air pipe close to the hexagonal plate.

[0012] Furthermore, n groups of arc tubes are fixed on the inner side of the hexagonal plate, with two arc tubes forming a group. A one-way valve 2 is fixed on the inner side of each arc tube. A hollow ring is fixed on the inner side of the n groups of arc tubes, and the inner sides of the n groups of gas pipes, n gas boxes, n groups of arc tubes and hollow rings are interconnected. A partition is fixed on the inner side of the ash removal chamber, and the other end of the n groups of gas pipes is fixed on the inner side of the partition.

[0013] Furthermore, the other ends of the n corrugated tubes are respectively fixed to the side of the n air boxes close to the sandblasting machine, the n corrugated tubes are equidistantly arranged about the steel bar in a circular axis, and the state of each corrugated tube is different.

[0014] Furthermore, a recovery frame is slidably connected to one side of the sandblasting machine, through holes are opened on both sides of the recovery frame, a separation plate is fixed on the inner side of the recovery frame, and the recovery frame is slidably connected to the bottom of the partition.

[0015] Furthermore, a support rod is fixed on one side of the partition away from the sandblasting machine, and a steel bar is slidably connected to the inner side of the support rod. A support rod is fixed on the inner side of the sandblasting machine, and the steel bar is slidably connected to the inner side of the support rod.

[0016] The beneficial effects of the present invention are as follows: (1) The rust removal and grinding device for cleaning the surface of steel bars described in the present invention has a fan-shaped abrasive sprayed from the spray gun during the rust removal process. The abrasive in the middle of the fan-shaped abrasive impacts the surface of the steel bars, and the abrasive at both ends impacts the blades of the turntable to rotate the turntable, thereby driving the corrugated tube to compress. The corrugated tube cooperates with the hollow ring to remove the abrasive powder on the surface of the steel bars after rust removal and cool the steel bars at the same time. Compared with the prior art, the turntable cooperates with the transmission part to drive the corrugated tube to compress and discharge air, which can blow away the abrasive powder on the surface of the steel bars in time after rust removal, reduce the residue of abrasive powder on the surface of the steel bars, and also reduce the intensity and difficulty of subsequent cleaning work. At the same time, it also reduces the impact of the residual abrasive powder on the subsequent processing or use of the steel bars. In addition, through this air cooling method, the heat on the surface of the steel bars can be taken away in time, so that the temperature of the steel bars is kept within a reasonable range, ensuring that the performance of the steel bars is not affected and extending the service life of the steel bars.

[0017] (2) On the basis of beneficial effect (1), the abrasives at both ends of the fan-shaped blades impact the turntable to rotate the turntable, thereby utilizing the kinetic energy of the abrasive that would otherwise be wasted. By converting the kinetic energy of the abrasive into the rotational mechanical energy of the turntable, secondary utilization of energy is achieved, the energy utilization efficiency of the entire rust removal system is improved, and power is provided for subsequent operations without consuming additional energy.

[0018] (3) The rust removal and grinding device for steel bar surface cleaning described in the present invention utilizes the pressure change when the corrugated tube is stretched and compressed to achieve efficient circulation of air between the corrugated tube, the air box, the arc tube and the hollow ring, greatly improving the air utilization rate and maintaining the system air pressure stable. During operation, the abrasive sprayed from the spray gun drives the turntable to rotate, so that the two corrugated tubes work alternately, ensuring that the air circulates continuously, realizing the uninterrupted operation of cleaning, cooling and other operations, and greatly improving work efficiency.

[0019] (4) The rust removal and grinding device for cleaning the surface of steel bars described in the present invention utilizes the pressure difference to form an air flow circulation in the dust removal chamber, and is designed to adsorb the abrasive powder on the top of the separation plate to prevent the powder from scattering at will, facilitating subsequent centralized cleaning. The staff can easily pull out the recovery rack to move the recovered parts out of the dust removal chamber. The operation is simple, and the powder dumping work can be completed quickly, reducing the cleaning time and manpower input, and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure of the rust removal and grinding device for cleaning the steel bar surface provided by the present invention; Figure 2 A schematic cross-sectional view of the overall structure of the rust removal and grinding device for cleaning the surface of steel bars provided by the present invention; Figure 3 for Figure 2 A magnified image of point A; Figure 4 for Figure 2 A magnified view of point B; Figure 5 Schematic diagram of the transmission structure of the rust removal and grinding device for cleaning the steel bar surface provided by the present invention Figure 1 ; Figure 6 Schematic diagram of the transmission structure of the rust removal and grinding device for cleaning the steel bar surface provided by the present invention Figure 2 ; Figure 7 A schematic diagram of the support rod structure of the rust removal and grinding device for cleaning the steel bar surface provided by the present invention; Figure 8 A schematic diagram of the partition structure of the rust removal and grinding device for cleaning the surface of steel bars provided by the present invention; Fig. 9 A schematic diagram of the structure of a separation plate of the rust removal and grinding device for cleaning the surface of steel bars provided by the present invention; Fig.10 A schematic diagram of the structure of a recovery frame of the rust removal and grinding device for cleaning the steel bar surface provided by the present invention; Fig.11A schematic diagram of the hollow ring structure of the rust removal and grinding device for cleaning the steel bar surface provided by the present invention; Fig.12 A schematic diagram of the hexagonal plate structure of the rust removal and grinding device for cleaning the steel bar surface provided by the present invention; Fig.13 A schematic diagram of the structure of an air storage component of the rust removal and grinding device for cleaning the surface of steel bars provided by the present invention.

[0022] In the figure: 1. sandblasting machine; 2. main passage; 3. air inlet pipe; 4. material pipe; 5. spray gun; 6. ash removal chamber; 7. turntable; 8. transmission part; 81. bracket; 82. reciprocating screw rod; 83. pull plate; 9. corrugated tube; 10. hollow ring; 101. arc tube; 11. separation plate; 12. partition; 13. steel bar; 14. recovery rack; 141. through hole; 15. support rod; 16. gas storage part; 161. hexagonal plate; 162. gas box; 163. gas pipe; 17. support rod. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0024] Example: Figure 1-Figure 13 As shown, a rust removal and grinding device for cleaning the surface of steel bars comprises a sandblasting machine 1, at least 2n spray guns 5 are arranged inside the sandblasting machine 1, wherein n≥2 and is an integer, and the spray guns 5 are equipped to cooperate with the sandblasting machine 1 to spray grinding sand in a fan shape, and the grinding sand in the middle of the fan shape is used to grind and remove rust on the steel bar 13; and a mechanical energy conversion part, which is equipped to convert the kinetic energy of the grinding sand on both sides of the fan shape sprayed by the spray gun 5 into the mechanical energy of sucking and spraying air, and then suck the outside air and continuously spray it onto the surface of the steel bar 13 to remove rust. Ash and cooling, the spray gun 5 is fixedly connected to the bottom of the top wall, the top of the bottom wall and the inner walls on both sides of the sandblasting machine 1 through connecting parts, and the spray gun 5 is linearly equidistantly arranged along the outer side of the steel bar 13, one of the input ends of each spray gun 5 is fixed with a material pipe 4, the other input end of each spray gun 5 is fixed with an air intake pipe 3, the other end of each material pipe 4 is fixedly connected to the sandblasting machine 1, a main passage 2 is fixed on one side of the sandblasting machine 1, the other end of each air intake pipe 3 is fixedly connected to the main passage 2 and is interconnected, and a ash removal chamber 6 is fixed on one side of the sandblasting machine 1.

[0025] In this embodiment, n is 2. The staff first places the straightener on the side of the sandblasting machine 1 away from the dust removal chamber 6, and aligns the output port of the straightener with the input port of the sandblasting machine 1 and is on the same axis. The straightener is started to straighten the steel bar 13 and then transport it to the inside of the sandblasting machine 1. The air compressor is then fixedly connected to the main passage 2 through a pipeline, and then the air compression pump is started to compress the air and pump it into the spray gun 5 through the main passage 2 and the air inlet pipe 3. Then the sandblasting machine 1 is started. The sandblasting machine 1 transports the abrasive (such as quartz sand, steel sand, etc.) to the spray gun 5. Finally, the spray gun 5 uses the strong airflow generated by the air compressor to spray the abrasive onto the surface of the steel bar 13 through the spray gun 5. The abrasive impacts the surface of the steel bar 13 at high speed, causing the rust layer and oxide scale to fall off for rust removal.

[0026] Specifically, a support rod 17 is fixed to the side of the partition 12 away from the sandblasting machine 1 , and the steel bar 13 is slidably connected to the inner side of the support rod 17 . A support rod 15 is fixed to the inner side of the sandblasting machine 1 , and the steel bar 13 is slidably connected to the inner side of the support rod 15 .

[0027] In this embodiment, when the steel bar 13 moves inside the sandblasting machine 1, the support rod 15 can provide support for the steel bar 13 and limit the steel bar. When the steel bar 13 moves inside the ash removal chamber 6, the support rod 17 can provide support for the steel bar 13 and limit the steel bar.

[0028] Specifically, the mechanical energy conversion unit includes a turntable 7, a transmission member 8, a corrugated tube 9, an air storage member 16 and a hollow ring 10, wherein the number of the turntable 7, the transmission member 8 and the corrugated tube 9 is n; the transmission member 8 is configured to drive the corrugated tube 9 to contract or stretch by the force of the turntable 7 rotating by utilizing the grinding sand sprayed by the spray gun 5, thereby continuously delivering air to the inside of the hollow ring 10, and the transmission member 8 includes a bracket 81, which is fixed to the inside of the sandblasting machine 1, and the turntable 7 is rotatably connected to the bracket 81 close to the dust removal On one side of the cavity 6, each turntable 7 and the spray gun 5 are symmetrically arranged about the steel bar 13, a reciprocating screw 82 is fixed on the side of the turntable 7 close to the ash removal cavity 6, and a pull plate 83 is connected to the outer side of the reciprocating screw 82 through a thread, and the pull plate 83 is located on the inner side of the ash removal cavity 6, the corrugated tube 9 is fixed to the side of the pull plate 83 away from the sandblasting machine 1, and the hollow ring 10 is fixed to the side of the corrugated tube 9 away from the sandblasting machine 1, which can guide the air of the transmission part 8 to the outside of the steel bar 13 to purge the steel bar 13.

[0029] In this embodiment, one of the corrugated tubes 9 is in a tensile state and the other corrugated tube 9 is in a compressed state. If the value of n is greater than 2, the state of each corrugated tube 9 needs to remain consistent in the initial state. During the rust removal process, the abrasive sprayed from the spray gun 5 is fan-shaped. The abrasive in the middle of the fan-shaped impacts the surface of the steel bar, and the abrasive at both ends impacts the blades of the turntable 7 to rotate the turntable 7. The turntable 7 drives the reciprocating screw 82 to rotate, and the reciprocating screw 82 drives the pull plate 83 fixedly connected to the corrugated tube 9 in a compressed state to move toward the side close to the partition 12. The pull plate 83 pulls the corrugated tube 9 connected thereto to start stretching. At the same time, the reciprocating screw 82 drives the pull plate 83 fixedly connected to the corrugated tube 9 in a tensile state to move toward the side away from the partition 12, and the pull plate 83 squeezes the corrugated tube 9 connected thereto to start compressing.

[0030] Specifically, the air storage member 16 is configured to guide the air delivered by the corrugated tube 9 to the inside of the hollow ring 10, and includes a hexagonal plate 161, which is fixed to the inner wall of the dust removal chamber 6 away from the sandblasting machine 1, and an air box 162 is fixed on the side of the hexagonal plate 161 close to the sandblasting machine 1, and the number of the air boxes 162 is n, and n groups of air delivery pipes 163 are fixed through the side of the air box 162 close to the sandblasting machine 1, and two air delivery pipes 163 form a group, and each air delivery pipe 163 close to the hexagonal plate 161 A one-way valve 1 is fixed on the inner side of one end, n groups of arc tubes 101 are fixed on the inner side of the hexagonal plate 161, two arc tubes 101 form a group, a one-way valve 2 is fixed on the inner side of each arc tube 101, the hollow ring 10 is fixed on the inner side of the n groups of arc tubes 101, and the n groups of gas pipes 163, n gas boxes 162, n groups of arc tubes 101 and the inner sides of the hollow ring 10 are interconnected, a partition 12 is fixed on the inner side of the ash removal chamber 6, and the other end of the n groups of gas pipes 163 is fixed on the inner side of the partition 12.

[0031] In this embodiment, when the corrugated tube 9 is stretched, the volume of the corrugated tube 9 increases so that the internal pressure thereof decreases. The air on the side of the partition 12 away from the hexagonal plate 161 enters the inner side of the gas delivery pipe 163 under the action of pressure, passes through the one-way valve 1 and enters the gas box 162, then enters the inner side of the corrugated tube 9 from the inner side of the gas box 162, and then is temporarily stored inside the corrugated tube 9 and the gas box 162. When the corrugated tube 9 is compressed, the volume of the corrugated tube 9 is reduced, so that the internal pressure thereof is increased. Under the action of the pressure, the air inside the corrugated tube 9 and the air box 162 enters the inner side of the arc tube 101, passes through the one-way valve 2 and enters the hollow ring 10, and finally sprays onto the surface of the steel bar 13, blowing the abrasive powder on the surface of the steel bar 13 away from the surface of the steel bar 13, and at the same time reducing the temperature of the surface of the steel bar; In the non-stop state, the abrasive sprayed by the spray gun 5 will make the turntable 7 rotate continuously, thereby driving the compressed corrugated tube 9 to stretch while driving the stretched corrugated tube 9 to compress. The two corrugated tubes 9 are always working in a staggered state, so that air circulation always exists, ensuring the continuity of work. Specifically, the other ends of the n corrugated tubes 9 are respectively fixed to the side of the n air boxes 162 close to the sandblasting machine 1, and the n corrugated tubes 9 are arranged equidistantly around the steel bar 13, and the state of each corrugated tube 9 is different. A recovery frame 14 is slidably connected to one side of the sandblasting machine 1, and through holes 141 are opened on both sides of the recovery frame 14. A separation plate 11 is fixed to the inner side of the recovery frame 14, and the recovery frame 14 is slidably connected to the bottom of the partition 12.

[0032] In this embodiment, when the air on the side of the partition 12 away from the hexagonal plate 161 is extracted, the air on the other side of the partition 12 will, under the action of pressure, pass through the separation plate 11 and the through hole 141 from the other side of the partition 12 to enter the side of the partition 12 away from the hexagonal plate 161 to balance the air pressure, forming an air circulation inside the ash removal chamber 6. When the abrasive powder on the surface of the steel bar is blown away from the surface of the steel bar 13, it will be driven to the top of the separation plate 11 by the airflow. At the same time, the airflow will adsorb the powder on the top of the separation plate 11, thereby avoiding dust caused by the abrasive powder. When the abrasive powder on the top of the separation plate 11 accumulates, the staff can pull out the recovery rack 14, and the recovery parts are moved out of the inside of the ash removal chamber 6 along the bottom of the partition 12, and the staff dumps the abrasive powder to a designated location.

[0033] Working principle: The staff first places the straightener on the side of the sandblasting machine 1 away from the dust removal chamber 6, and aligns the output port of the straightener with the input port of the sandblasting machine 1, starts the straightener to straighten the steel bar 13 and then transports it to the inside of the sandblasting machine 1, then fixes the air compressor to the main passage 2 through the pipeline, and then starts the air compression pump and the sandblasting machine 1. The spray gun 5 uses the strong airflow generated by the air compressor to spray the abrasive through the spray gun 5 onto the surface of the steel bar 13 to remove rust; During this process, the abrasive impacts the blades of the turntable 7 to make the turntable 7 rotate, and the turntable 7 drives the reciprocating screw 82 to rotate, and the reciprocating screw 82 drives the pull plate 83 fixedly connected to the corrugated tube 9 in a compressed state to move toward the side close to the partition 12, and the pull plate 83 pulls the corrugated tube 9 connected thereto to start stretching. At the same time, the reciprocating screw 82 drives the pull plate 83 fixedly connected to the corrugated tube 9 in a stretched state to move toward the side away from the partition 12, and the pull plate 83 squeezes the corrugated tube 9 connected thereto to start compressing. When the air on the side of the partition 12 away from the hexagonal plate 161 is extracted, the air on the other side of the partition 12 Under the action of pressure, it will penetrate through the separation plate 11 and the through hole 141 from the other side of the partition 12 and enter the side of the partition 12 away from the hexagonal plate 161 to balance the air pressure, forming an air circulation inside the ash removal chamber 6. Without stopping the machine, the abrasive sprayed by the spray gun 5 will cause the turntable 7 to rotate continuously, thereby driving the compressed corrugated tube 9 to stretch while driving the stretched corrugated tube 9 to compress. The two corrugated tubes 9 always work in a staggered state, so that air circulation always exists. When the abrasive powder on the surface of the steel bar is blown away from the surface of the steel bar 13, it will be driven to the top of the separation plate 11 by the airflow, and the airflow will adsorb the powder on the top of the separation plate 11.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rust removal and grinding device for cleaning the surface of a steel bar, comprising a sandblasting machine (1), wherein at least 2n spray guns (5) are arranged inside the sandblasting machine (1), wherein n ≥ 2 and is an integer, and wherein: It also includes a spray gun (5) which is configured to cooperate with the sandblasting machine (1) to spray grinding sand in a fan shape, and the grinding sand in the middle of the fan shape is used to grind and remove rust from the steel bar (13); And a mechanical energy conversion unit, which is configured to convert the kinetic energy of the sand sprayed by the spray gun (5) on both sides of the fan into mechanical energy for sucking and spraying air, and then suck the outside air and continuously spray it onto the surface of the steel bar (13) to remove dust and cool it.

2. The rust removal and grinding device for cleaning the steel bar surface as claimed in claim 1, characterized in that: The spray guns (5) are respectively fixedly connected to the bottom of the top wall, the top of the bottom wall and the inner walls on both sides of the sandblasting machine (1) through connecting components, and the spray guns (5) are linearly arranged at equal distances along the outer side of the steel bar (13). One input end of each spray gun (5) is fixed with a material pipe (4), and the other input end of each spray gun (5) is fixed with an air intake pipe (3). The other end of each material pipe (4) is fixedly connected to the sandblasting machine (1). A main passage (2) is fixed to one side of the sandblasting machine (1), and the other end of each air intake pipe (3) is fixedly connected to the main passage (2) and communicated with each other. A dust removal chamber (6) is fixed to one side of the sandblasting machine (1).

3. The rust removal and grinding device for cleaning the steel bar surface according to claim 1, characterized in that: The mechanical energy conversion unit comprises a rotating disk (7), a transmission member (8), a corrugated tube (9), an air storage member (16) and a hollow ring (10), wherein the number of the rotating disk (7), the transmission member (8) and the corrugated tube (9) is n; The transmission member (8) is configured to drive the corrugated tube (9) to contract or stretch by utilizing the force of the grinding sand sprayed by the spray gun (5) to drive the rotating disk (7) to rotate, thereby continuously conveying air to the inside of the hollow ring (10).

4. The rust removal and grinding device for cleaning the steel bar surface as claimed in claim 3, characterized in that: The transmission member (8) comprises a bracket (81), the bracket (81) being fixed to the inner side of the sandblasting machine (1), the turntable (7) being rotatably connected to a side of the bracket (81) close to the dust removal chamber (6), and each turntable (7) and the spray gun (5) being symmetrically arranged about the steel bar (13), a reciprocating screw rod (82) being fixed to a side of the turntable (7) close to the dust removal chamber (6), a pull plate (83) being connected to the outer side of the reciprocating screw rod (82) by means of a thread, the pull plate (83) being located on the inner side of the dust removal chamber (6), and a corrugated tube (9) being fixed to a side of the pull plate (83) away from the sandblasting machine (1).

5. The rust removal and grinding device for cleaning the steel bar surface as claimed in claim 4, characterized in that: The hollow ring (10) is fixed to a side of the corrugated tube (9) away from the sandblasting machine (1), and is capable of guiding the air of the transmission member (8) to the outside of the steel bars (13) to purge the steel bars (13).

6. The rust removal and grinding device for cleaning the steel bar surface as claimed in claim 5, characterized in that: The air storage member (16) is configured to guide the air transported by the corrugated tube (9) to the inner side of the hollow ring (10), and comprises a hexagonal plate (161). The hexagonal plate (161) is fixed to the inner wall of the dust removal chamber (6) on the side away from the sandblasting machine (1). An air box (162) is fixed on the side of the hexagonal plate (161) close to the sandblasting machine (1). The number of air boxes (162) is n. n groups of air delivery pipes (163) are fixed through the side of the air box (162) close to the sandblasting machine (1), and two air delivery pipes (163) form a group. A one-way valve is fixed on the inner side of one end of each air delivery pipe (163) close to the hexagonal plate (161).

7. The rust removal and grinding device for cleaning the steel bar surface as claimed in claim 6, characterized in that: N groups of arc-shaped tubes (101) are fixed on the inner side of the hexagonal plate (161), two arc-shaped tubes (101) form a group, and two non-return valves are fixed on the inner side of each arc-shaped tube (101). The hollow ring (10) is fixed on the inner side of the n groups of arc-shaped tubes (101), and the n groups of gas pipes (163), the n gas boxes (162), the n groups of arc-shaped tubes (101) and the inner sides of the hollow rings (10) are interconnected. A partition plate (12) is fixed on the inner side of the ash removal chamber (6), and the other ends of the n groups of gas pipes (163) are fixed on the inner side of the partition plate (12).

8. The rust removal and grinding device for cleaning the steel bar surface as claimed in claim 7, characterized in that: The other ends of the n corrugated tubes (9) are respectively fixed to a side of the n air boxes (162) close to the sandblasting machine (1), the n corrugated tubes (9) are arranged equidistantly around the steel bar (13), and each corrugated tube (9) has a different state.

9. The rust removal and grinding device for cleaning the steel bar surface as claimed in claim 7, characterized in that: A recovery frame (14) is slidably connected to one side of the sandblasting machine (1), through holes (141) are provided on both sides of the recovery frame (14), a separation plate (11) is fixed to the inner side of the recovery frame (14), and the recovery frame (14) is slidably connected to the bottom of the partition (12).

10. The rust removal and grinding device for cleaning the steel bar surface as claimed in claim 9, characterized in that: A support rod (17) is fixed to the side of the partition (12) away from the sandblasting machine (1), and the steel bar (13) is slidably connected to the inner side of the support rod (17); a support rod (15) is fixed to the inner side of the sandblasting machine (1), and the steel bar (13) is slidably connected to the inner side of the support rod (15).

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