A gas-sealed wet spraying machine feeding system and use method thereof

Abstract

The present invention relates to a gas-sealed wet spraying machine feeding system, including a feeding hopper, a distributor, a discharge pipe, a receiving tray, and a high-pressure air pipe, wherein the upper end face of the distributor is connected to the feeding hopper, and the lower end face is connected to the receiving tray, and the feeding hopper, the distributor, and the receiving tray are coaxially distributed, the front end face of the receiving tray is connected to the discharge pipe through a guide port, and the rear end face is mutually connected to the high-pressure air pipe through a guide port, the feeding hopper is a trough-shaped structure with an inverted isosceles trapezoid in axial section, and the receiving tray is a closed cavity structure with a rectangular axial section, and the upper end face is provided with a guide port and is connected to the powder feeder; the method of use includes two steps, namely, equipment assembly and material distribution and conveying. On the one hand, the present invention can effectively realize the continuous distribution and conveying of powder, liquid, solid-liquid mixed materials, etc.; on the other hand, it effectively overcomes the defect of poor material supply and feeding stability caused by the reflux of materials in the barrel due to excessive pressure at the discharge position during the operation of the traditional wet spraying machine.

Description

Technical Field

[0001] The invention relates to a gas-sealed wet spraying machine feeding system and a use method thereof, belonging to the technical field of spraying equipment. Background Art

[0002] When the wet spraying machine is unloading, dividing and spraying, the various types of dividing equipment currently used are often traditional barrels and metal dividing plate structures. Although they can meet the needs of dividing operations, the feeding pressure at the current divider inlet is often lower than that at the outlet. As a result, during the dividing and discharging operations of the divider, it is very easy to cause excessive air pressure at the outlet. On the one hand, the material discharged from the distributor outlet cannot be effectively transported to the wet spraying machine spraying system; on the other hand, it is also easy to cause excessive material conveying pressure in the spraying system, causing the spraying material to flow back from the spraying system along the distributor outlet into the distributor, causing serious dividing and feeding failures in the distributor, and also causing large wear on the distributor equipment during operation. In severe cases, it may even cause the distributor to be blocked, resulting in serious equipment damage, affecting the stability of normal spraying and feeding operations and the stability and reliability of equipment operation.

[0003] Therefore, in view of this situation, it is urgent to develop a new distributor device and use method to meet the needs of actual use. Summary of the invention

[0004] The object of the present invention is to overcome the above-mentioned shortcomings and provide an air-sealed wet spraying machine feeding system and a method of using the same.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A gas-sealed wet spraying machine feeding system comprises a feeding hopper, a distributor, a discharge pipe, a receiving tray and a high-pressure air pipe, wherein the upper end face of the distributor is connected to the feeding hopper, and the lower end face is connected to the receiving tray, and the feeding hopper, the distributor and the receiving tray are coaxially distributed, a guide port is arranged on the front end face and the rear end face of the receiving tray, the front end face of the receiving tray is connected to the discharge pipe through the guide port, and the rear end face is connected to the high-pressure air pipe through the guide port, the feeding hopper is a groove-shaped structure with an inverted isosceles trapezoid in axial section, the receiving tray is a closed cavity structure with a rectangular axial section, the upper end face is provided with a guide port and is connected to a powder feeder.

[0007] Furthermore, the lower hopper, distributor and receiving tray are all embedded in the same load-bearing keel, and the load-bearing keel is a rectangular frame structure. The lower hopper, distributor and receiving tray are distributed from top to bottom along the axis of the load-bearing keel, and are respectively connected to the inner surface of the load-bearing keel through at least two slide grooves. The slide grooves are symmetrically distributed with respect to the axis of the load-bearing keel, and form an angle of 30°-90° with the axis of the load-bearing keel. The discharge pipe and high-pressure air pipe are both hinged to the load-bearing keel, and their axes form an angle of 30°-90° with the axis of the load-bearing keel.

[0008] Furthermore, the slide groove and the load-bearing keel are hinged via a ratchet mechanism, and the lower end surface of the slide groove and the load-bearing keel are further connected via at least one elastic telescopic rod.

[0009] Furthermore, the distributor includes a barrel, a transmission shaft, a distributor wheel, a sealing baffle, and an air inlet, wherein the barrel is a cylindrical closed cavity structure, a discharge port and a feed port are respectively arranged on the barrel, the discharge port and the feed port are both communicated with the barrel, the distributor wheel is embedded in the barrel and coaxially distributed with the barrel, its front end face and rear end face are respectively connected to the side wall of the barrel through the transmission shaft, and are coaxially distributed with the transmission shaft, and the front end face of the transmission shaft is respectively located outside the barrel, the distributor wheel is located between the discharge port and the feed port, and the length of the distributor wheel is at least 10 mm larger than the width of the discharge port and the feed port, and the width between the front end face and the rear end face of the distributor wheel and the inner surface of the side wall of the front end face and the rear end face of the barrel is not less than 5 There is an isolation gap of millimeters, and there are two sealing baffles in total. They are annular disc structures coaxially distributed with the barrel, wrapped outside the transmission shaft and located in the isolation gaps on both sides of the distribution wheel, and the front end face of the sealing baffle is connected to the side wall of the barrel through a positioning mechanism, and the rear end face is abutted against and slidably connected to the side surface of the distribution wheel. The diameter of the sealing baffle is 1 / 4-2 / 3 of the diameter of the isolation gap, and the isolation gap above and below the axis of the transmission shaft is divided into two independent closed cavities, wherein the barrel side wall and the distribution wheel side wall corresponding to the isolation gap located below the transmission shaft are provided with an air inlet, and are connected to the high-pressure air pipe and the distribution wheel respectively through the air inlet, and the axis of the air inlet is distributed parallel to the axis of the barrel.

[0010] Further, the material distributing wheel includes a bushing, side baffles, material distributing plates, sealing strips and sealing rings. The bushing is a hollow columnar structure, which is wrapped outside the transmission shaft and coaxially distributed with the transmission shaft. A plurality of connecting chutes parallel to its axis are evenly distributed on the outer surface of the bushing. There are a plurality of material distributing plates, which are evenly distributed around the axis of the bushing and are slidably connected to the outer surface of the bushing through the connecting chutes. A material distributing groove with an isosceles trapezoid cross-section is formed between adjacent two material distributing plates. There are two side baffles in total, which are symmetrically distributed on both sides of the bushing, are slidably connected to the outer surface of the bushing through the connecting chutes and abut against the side end faces of each material distributing plate. The side baffle is an annular plate-shaped structure coaxially distributed with the bushing, is wrapped outside the bushing through the connecting chutes, and an annular positioning groove coaxially distributed with the bushing is arranged on its upper end face and is connected to the sealing ring through the positioning groove. The sealing strip is a groove-shaped structure with a "冂"-shaped cross-section, is wrapped on the upper end face of the material distributing plate and is parallel to the upper end face of the material distributing plate. The upper end faces of the sealing strip and the sealing ring both abut against and are slidably connected to the inner surface of the material cylinder. An air inlet is arranged on each of the side baffles corresponding to both sides of the material distributing groove, and the axis of the air inlet is parallel to the axis of the bushing, and the distance between the air inlet and the outer surface of the bushing is 10%-30% of the depth of the material distributing groove.

[0011] Further, the side baffle, the material distributing plate and the connecting chute are connected to each other through positioning pins; the sealing strip includes a metal sleeve and an elastic wear-resistant strip. The metal sleeve has an "H"-shaped cross-section, and its lower end face is wrapped on the upper end face of the material distributing plate. At least one elastic wear-resistant strip is embedded in the metal sleeve, and the upper end face of the elastic wear-resistant strip is at least 5 mm higher than the upper end face of the metal sleeve. The metal sleeve is connected to the material distributing plate and the elastic wear-resistant strip through bolts respectively.

[0012] Further, the positioning mechanism includes a pressure-bearing spring and a positioning pin. A positioning hole is arranged on the side wall of the material cylinder corresponding to the positioning mechanism. The pressure-bearing spring and the rear half of the positioning pin are embedded in the positioning hole and are coaxially distributed with the positioning hole. The rear end face of the pressure-bearing spring abuts against the bottom of the positioning hole, and the front end face abuts against the rear end face of the positioning pin. The front end face of the positioning pin is located outside the positioning hole and is connected to the sealing baffle, and the positioning pin is vertically distributed with the front end of the sealing baffle.

[0013] Further, at least one pneumatic vibrator is arranged on the outer surface of the feed hopper, and the pneumatic vibrator is communicated with the high-pressure air pipe through a diversion branch pipe. The high-pressure air pipe is communicated with the receiving tray and the diversion branch pipe through a control valve.

[0014] A using method of a pneumatic seal type wet shotcreting machine feeding system includes the following steps:

[0015] S1, equipment assembly, first assemble the lower hopper, distributor, discharge pipe, receiving tray, and high-pressure air pipe constituting the present invention, and centrally install them on the wet spraying machine frame through the bearing keel, then connect the discharge pipe to the external spraying equipment, connect the high-pressure air pipe to the high-pressure source of the wet spraying machine, connect the distributor to the power equipment of the wet spraying machine, and then complete the equipment assembly;

[0016] S2, material discharge operation, after step S1, the spraying operation can be carried out. During the spraying operation, the slurry to be sprayed is added to the lower hopper, and the distributor is driven to operate at the same time. The power drive device of the wet spraying machine drives the distribution wheel to rotate through the transmission shaft, and at the same time, the high-pressure air pipe is transported to the isolation gap in the lower half of the barrel through the air inlet, so that the air pressure of the barrel below the transmission shaft is greater than the air pressure of the barrel above the transmission shaft and the air pressure of the spraying machine discharge mechanism, and then the slurry to be constructed is transported from the feed port of the present invention into the barrel, and the slurry transported to the barrel is transported to the barrel. The slurry in the barrel is carried by the dividing grooves of the dividing wheel and is transferred from the top of the transmission shaft to the bottom of the transmission shaft in sequence through rotation. When the material is transferred to the lower part of the barrel transmission shaft along the dividing groove, the high-pressure airflow in the isolation gap is directly transported to the dividing groove through the air inlet, increasing the material pressure in the dividing groove, so that the material is discharged from the dividing groove under the high-pressure gas transportation and transported from the barrel to the receiving tray through the discharge port. After the sprayed slurry enters the receiving tray, it is pressurized through the high-pressure air pipe and discharged from the discharge pipe for transportation.

[0017] Furthermore, in step S2, the air pressure in the isolation gap of the lower half of the transmission shaft is 1.5-3 times the air pressure of the wet spraying machine discharge mechanism, and the air inlets at both ends of the barrel deliver the same high-pressure gas pressure.

[0018] The invention has a simple structure, is flexible and convenient to use, has good versatility, and has a simple and easy-to-master processing technology with high processing precision. It has good carrying capacity and material distribution capacity. On the one hand, it can effectively realize the continuous distribution and transportation of powdered, liquid, solid-liquid mixed materials, etc., so as to meet the needs of wet spraying machine operation. On the other hand, during operation, it can effectively improve the material discharge, so that the material pressure at the discharge position is greater than the pressure at the feed port position of the barrel and the pressure of the wet spraying machine spraying operation system, thereby effectively overcoming the defect of poor material supply and feeding stability caused by the excessive pressure at the discharge position during the operation of the traditional wet spraying machine, thereby greatly improving the feeding operation stability of the wet spraying machine and the operation efficiency and quality stability of the spraying operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the distributor;

[0021] Figure 3It is a schematic diagram of the partial structure of the material distribution wheel from the side;

[0022] Figure 4 The figure is a flow chart of the method for using the present invention. DETAILED DESCRIPTION

[0023] like Figure 1 —3 shows an air-sealed wet spraying machine feeding system, comprising a feeding hopper 1, a distributor 2, a discharge pipe 3, a receiving tray 4 and a high-pressure air pipe 5, wherein the upper end face of the distributor 2 is connected to the feeding hopper 1, and the lower end face is connected to the receiving tray 4, and the feeding hopper 1, the distributor 2 and the receiving tray 4 are coaxially distributed, and the front end face and the rear end face of the receiving tray 4 are each provided with a guide port 6, the front end face of the receiving tray 4 is connected to the discharge pipe 3 through the guide port 6, and the rear end face is interconnected with the high-pressure air pipe 5 through the guide port 6, the feeding hopper 1 is a trough-shaped structure with an inverted isosceles trapezoidal axial section, and the receiving tray 4 is a closed cavity structure with a rectangular axial section, and the upper end face thereof is provided with a guide port 6 and is connected to the powder feeder 2.

[0024] Among them, the lower hopper 1, the distributor 2, and the receiving tray 4 are all embedded in the same supporting keel 7, and the supporting keel 7 is a rectangular frame structure. The lower hopper 1, the distributor 2, and the receiving tray 4 are distributed from top to bottom along the axis of the supporting keel 1, and are respectively connected to the inner surface of the supporting keel 7 through at least two slide grooves 8. The slide grooves 8 are symmetrically distributed with the axis of the supporting keel 1, and form an angle of 30°-90° with the axis of the supporting keel 1. The discharge pipe 3 and the high-pressure air pipe 5 are both hinged to the supporting keel 7, and their axes form an angle of 30°-90° with the axis of the supporting keel 7. The slide groove 8 is hinged to the supporting keel 7 through a ratchet mechanism 9, and the lower end face of the slide groove 8 is connected to the supporting keel 1 through at least one elastic telescopic rod 10.

[0025] It is emphasized that the distributor 6 includes a barrel 61, a transmission shaft 62, a distributor wheel 63, a sealing baffle 64, and an air inlet 65, wherein the barrel 61 is a cylindrical closed cavity structure, and a discharge port 611 and a feed port 612 are respectively arranged on the barrel 61, and the discharge port 611 and the feed port 612 are both communicated with the barrel 61, and the distributor wheel 63 is embedded in the barrel 61 and coaxially distributed with the barrel 61, and its front end face and rear end face are respectively connected to the side wall of the barrel 61 through the transmission shaft 62, and are coaxially distributed with the transmission shaft 62, and the front end face of the transmission shaft 62 is respectively located outside the barrel 61, and the distributor wheel 63 is located between the discharge port 611 and the feed port 612, and the length of the distributor wheel 63 is at least 10 mm larger than the width of the discharge port 611 and the feed port 612, and the front end face and the rear end face of the distributor wheel 63 are aligned with the inner side wall of the front end face and the rear end face of the barrel 61 An isolation gap 66 with a width of not less than 5 mm is set between the surfaces. There are two sealing baffles 64, which are annular disc structures coaxially distributed with the barrel 61, wrapped outside the transmission shaft 62 and located in the isolation gap 66 on both sides of the dividing wheel 63, and the front end face of the sealing baffle 64 is connected to the side wall of the barrel 61 through a positioning mechanism 67, and the rear end face is abutted against and slidably connected to the side surface of the dividing wheel 63. The diameter of the sealing baffle 64 is 1 / 4-2 / 3 of the diameter of the isolation gap 66, and the isolation gap 66 above and below the axis of the transmission shaft 62 is divided into two independent closed cavities, wherein the side wall of the barrel 61 and the side wall of the dividing wheel 63 corresponding to the isolation gap 66 located below the transmission shaft 62 are provided with an air inlet 65, and are connected to the high-pressure air pipe 5 and the dividing wheel 63 respectively through the air inlet 65, and the axis of the air inlet 65 is distributed parallel to the axis of the barrel 61.

[0026] In addition, the material distribution wheel 63 includes a bushing 631, side baffles 632, material distribution plates 633, a sealing strip 634, and a sealing ring 635. The bushing 631 is a hollow columnar structure, which is wrapped around the transmission shaft 62 and coaxially distributed with the transmission shaft 62. A number of connecting sliding grooves 636 parallel to its axis are evenly distributed on the outer surface of the bushing 631. There are several material distribution plates 633, which are evenly distributed around the axis of the bushing 31 and are slidably connected to the outer surface of the bushing 631 through the connecting sliding grooves 636. And a material distribution groove 638 with an isosceles trapezoid cross-section is formed between two adjacent material distribution plates 633. There are two side baffles 632 in total, which are symmetrically distributed on both sides of the bushing 631, are slidably connected to the outer surface of the bushing 631 through the connecting sliding grooves 636 and abut against the side end faces of each material distribution plate 633. The side baffle 632 is an annular plate-like structure coaxially distributed with the bushing 631, is wrapped around the outside of the bushing 631 through the connecting sliding grooves 636, and an annular positioning groove 637 coaxially distributed with the bushing 631 is provided on its upper end face and is connected to the sealing ring 635 through the positioning groove 637. The sealing strip 634 is a groove-like structure with an "冂" - shaped cross-section, is wrapped around the upper end face of the material distribution plate 633 and is parallel to the upper end face of the material distribution plate 633. And the upper end faces of the sealing strip 634 and the sealing ring 635 both abut against and are slidably connected to the inner surface of the material cylinder 61. An air inlet 65 is provided on each of the side baffles 632 corresponding to both sides of the material distribution groove 638, and the axis of the air inlet 65 is parallel to the axis of the bushing 631, and the distance between the air inlet 65 and the outer surface of the bushing 631 is 10% - 30% of the depth of the material distribution groove 338.

[0027] Meanwhile, the side baffles 632, the material distribution plates 633 and the connecting sliding grooves 636 are connected to each other through positioning pins 639. The sealing strip 634 includes a metal sleeve 6341 and an elastic wear-resistant strip 6342. The metal sleeve 6341 has an "H" - shaped cross-section structure, and its lower end face is wrapped around the upper end face of the material distribution plate 633. At least one elastic wear-resistant strip 6342 is embedded in the metal sleeve 6341 and the upper end face of the elastic wear-resistant strip 6342 is at least 5 millimeters higher than the upper end face of the metal sleeve 6341. And the metal sleeve 6341 is connected to the material distribution plate and the elastic wear-resistant strip 6342 respectively through bolts.

[0028] Further optimized, the positioning mechanism 67 includes a pressure-bearing spring 671 and a positioning pin 672. A positioning hole 673 is provided on the side wall of the material cylinder 61 corresponding to the positioning mechanism 67. The pressure-bearing spring 671 and the rear half of the positioning pin 672 are embedded in the positioning hole 673 and are coaxially distributed with the positioning hole 673. The rear end face of the pressure-bearing spring 671 abuts against the bottom of the positioning hole 673, and the front end face abuts against the rear end face of the positioning pin 672. The front end face of the positioning pin 672 is located outside the positioning hole 673 and is connected to the sealing baffle 64, and the positioning pin 672 is vertically distributed with the front end of the sealing baffle 64.

[0029] In this embodiment, at least one pneumatic vibrator 11 is provided on the outer surface of the lower hopper 1, and the pneumatic vibrator 11 is connected to the high-pressure air pipe 5 through a guide branch pipe 12, and the high-pressure air pipe 5 is connected to the receiving tray 4 and the guide branch pipe 12 through a control valve 13.

[0030] like Figure 4 As shown, a method for using a gas-sealed wet spraying machine feeding system comprises the following steps:

[0031] S1, equipment assembly, first assemble the lower hopper, distributor, discharge pipe, receiving tray, and high-pressure air pipe constituting the present invention, and centrally install them on the wet spraying machine frame through the bearing keel, then connect the discharge pipe to the external spraying equipment, connect the high-pressure air pipe to the high-pressure source of the wet spraying machine, connect the distributor to the power equipment of the wet spraying machine, and then complete the equipment assembly;

[0032] S2, material discharge operation, after step S1, the spraying operation can be carried out. During the spraying operation, the slurry to be sprayed is added to the lower hopper, and the distributor is driven to operate at the same time. The power drive device of the wet spraying machine drives the distribution wheel to rotate through the transmission shaft, and at the same time, the high-pressure air pipe is transported to the isolation gap in the lower half of the barrel through the air inlet, so that the air pressure of the barrel below the transmission shaft is greater than the air pressure of the barrel above the transmission shaft and the air pressure of the spraying machine discharge mechanism, and then the slurry to be constructed is transported from the feed port of the present invention into the barrel, and the slurry transported to the barrel is transported to the barrel. The slurry in the barrel is carried by the dividing grooves of the dividing wheel and is transferred from the top of the transmission shaft to the bottom of the transmission shaft in sequence through rotation. When the material is transferred to the lower part of the barrel transmission shaft along the dividing groove, the high-pressure airflow in the isolation gap is directly transported to the dividing groove through the air inlet, increasing the material pressure in the dividing groove, so that the material is discharged from the dividing groove under the high-pressure gas transportation and transported from the barrel to the receiving tray through the discharge port. After the sprayed slurry enters the receiving tray, it is pressurized through the high-pressure air pipe and discharged from the discharge pipe for transportation.

[0033] Among them, in the step S2, the air pressure in the isolation gap of the lower half of the transmission shaft is 1.5-3 times the air pressure of the wet spraying machine discharge mechanism, and the air inlets located at both ends of the barrel deliver the same high-pressure gas pressure.

[0034] The invention has a simple structure, is flexible and convenient to use, has good versatility, and has a simple and easy-to-master processing technology with high processing precision. It has good carrying capacity and material distribution capacity. On the one hand, it can effectively realize the continuous distribution and transportation of powdered, liquid, solid-liquid mixed materials, etc., so as to meet the needs of wet spraying machine operation. On the other hand, during operation, it can effectively improve the material discharge, so that the material pressure at the discharge position is greater than the pressure at the feed port position of the barrel and the pressure of the wet spraying machine spraying operation system, thereby effectively overcoming the defect of poor material supply and feeding stability caused by the excessive pressure at the discharge position during the operation of the traditional wet spraying machine, thereby greatly improving the feeding operation stability of the wet spraying machine and the operation efficiency and quality stability of the spraying operation.

[0035] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An air-sealed wet spraying machine feeding system, characterized in that: It includes a lower hopper, a distributor, a discharge pipe, a receiving plate, and a high-pressure air pipe, wherein the upper end face of the distributor is connected to the lower hopper, and the lower end face is connected to the receiving plate, and the lower hopper, distributor, and receiving plate are coaxially distributed, and the front end face and the rear end face of the receiving plate are each provided with a guide port, the front end face of the receiving plate is connected to the discharge pipe through the guide port, and the rear end face is connected to the high-pressure air pipe through the guide port. The lower hopper is a groove-shaped structure with an inverted isosceles trapezoidal axial section, and the receiving plate is a closed cavity structure with a rectangular axial section, and its upper end face is provided with a guide port and is connected to the distributor; the lower hopper, distributor, and receiving plate are all embedded in the same load-bearing keel The load-bearing keel is a rectangular frame structure. The lower hopper, the distributor, and the receiving plate are distributed from top to bottom along the axis of the load-bearing keel, and are respectively connected to the inner surface of the load-bearing keel through at least two slide grooves. The slide grooves are symmetrically distributed with the axis of the load-bearing keel, and form an angle of 30°-90° with the axis of the load-bearing keel. The discharge pipe and the high-pressure air pipe are both hinged to the load-bearing keel, and their axes form an angle of 30°-90° with the axis of the load-bearing keel; the slide groove is hinged to the load-bearing keel through a ratchet mechanism, and the lower end surface of the slide groove is connected to the load-bearing keel through at least one elastic telescopic rod; the distributor includes a barrel, a transmission shaft, a distributor wheel, a sealing baffle, an air inlet , wherein the material barrel is a cylindrical closed cavity structure, a discharge port and a feed port are respectively arranged on the material barrel, the discharge port and the feed port are both communicated with the material barrel, the material dividing wheel is embedded in the material barrel and coaxially distributed with the material barrel, its front end face and rear end face are respectively connected to the side wall of the material barrel through a transmission shaft, and are coaxially distributed with the transmission shaft, and the front end face of the transmission shaft is respectively located outside the material barrel, the material dividing wheel is located between the discharge port and the feed port, and the length of the material dividing wheel is at least 10 mm larger than the width of the discharge port and the feed port, and an isolation gap with a width of not less than 5 mm is set between the front end face and the rear end face of the material dividing wheel and the inner surface of the side wall of the front end face and the rear end face of the material barrel, and the sealing baffle is Two, which are annular disc structures coaxially distributed with the barrel, are coated on the outside of the transmission shaft and located in the isolation gaps on both sides of the dividing wheel, and the front end face of the sealing baffle is connected to the side wall of the barrel through a positioning mechanism, and the rear end face is abutted against and slidably connected to the side surface of the dividing wheel. The diameter of the sealing baffle is 1 / 4-2 / 3 of the diameter of the isolation gap, and the isolation gap above and below the axis of the transmission shaft is divided into two independent closed cavities, wherein the barrel side wall and the dividing wheel side wall corresponding to the isolation gap located below the transmission shaft are provided with an air inlet, and are connected to the high-pressure air pipe and the dividing wheel respectively through the air inlet, and the axis of the air inlet is distributed parallel to the axis of the barrel.

2. The air-sealed wet spraying machine feeding system according to claim 1 is characterized in that: The material distributing wheel includes a bushing, side baffles, material distributing plates, sealing strips and a sealing ring. The bushing is a hollow columnar structure, which is sleeved outside the transmission shaft and coaxially distributed with the transmission shaft. A number of connecting sliding grooves parallel to its axis are evenly distributed on the outer surface of the bushing. There are several material distributing plates, which are evenly distributed around the axis of the bushing and are slidably connected to the outer surface of the bushing through the connecting sliding grooves. And a material distributing groove with an isosceles trapezoid cross-section is formed between two adjacent material distributing plates. There are two side baffles in total, which are symmetrically distributed on both sides of the bushing, are slidably connected to the outer surface of the bushing through the connecting sliding grooves and are abutted against the side end faces of each material distributing plate. The side baffle is an annular plate-shaped structure coaxially distributed with the bushing, and is sleeved outside the bushing through the connecting sliding groove. An annular positioning groove coaxially distributed with the bushing is arranged on its upper end face, and is connected to the sealing ring through the positioning groove. The sealing strip is a groove-shaped structure with an "n"-shaped cross-section, which is sleeved on the upper end face of the material distributing plate and is parallel to the upper end face of the material distributing plate. And the upper end faces of the sealing strip and the sealing ring are both abutted against and slidably connected to the inner surface of the material barrel. An air inlet is arranged on each of the side baffles corresponding to both sides of the material distributing groove, and the axis of the air inlet is parallel to the axis of the bushing, and the distance between the air inlet and the outer surface of the bushing is 10%-30% of the depth of the material distributing groove.

3. The air-sealed wet spraying machine feeding system according to claim 2 is characterized in that: The side baffle, the material distributing plate and the connecting sliding groove are connected to each other through a positioning pin; the sealing strip includes a metal sleeve and an elastic wear-resistant strip. The cross-section of the metal sleeve is an "H"-shaped structure, and its lower end is sleeved on the upper end face of the material distributing plate. At least one elastic wear-resistant strip is embedded in the metal sleeve, and the upper end face of the elastic wear-resistant strip is at least 5 mm higher than the upper end face of the metal sleeve. And the metal sleeve is connected to the material distributing plate and the elastic wear-resistant strip through bolts respectively.

4. The air-sealed wet spraying machine feeding system according to claim 1 is characterized in that: The positioning mechanism includes a pressure-bearing spring and a positioning pin. A positioning hole is arranged on the side wall of the material barrel corresponding to the positioning mechanism. The pressure-bearing spring and the rear half of the positioning pin are embedded in the positioning hole and are coaxially distributed with the positioning hole. The rear end face of the pressure-bearing spring abuts against the bottom of the positioning hole, and the front end face abuts against the rear end face of the positioning pin. The front end face of the positioning pin is located outside the positioning hole and is connected to the sealing baffle, and the positioning pin is vertically distributed with the front end of the sealing baffle.

5. The air-sealed wet spraying machine feeding system according to claim 1 is characterized in that: At least one pneumatic vibrator is arranged on the outer surface of the feeding hopper, and the pneumatic vibrator is communicated with a high-pressure air pipe through a diversion branch pipe. The high-pressure air pipe, the receiving tray and the diversion branch pipe are communicated with each other through a control valve.

6. The method for using the air-sealed wet spraying machine feeding system according to claim 2, characterized in that: It includes the following steps: S1. Equipment assembly. First, assemble the feeding hopper, the material distributor, the discharge pipe, the receiving tray and the high-pressure air pipe, and centrally install them on the frame of the wet shotcreting machine through the load-bearing keel. Then connect the discharge pipe to the external shotcreting equipment, connect the high-pressure air pipe to the high-pressure air source of the wet shotcreting machine, and connect the material distributor to the power equipment of the wet shotcreting machine to complete the equipment assembly; S2, material discharge operation, after S1 is completed, the spraying operation is carried out. During the spraying operation, the spraying slurry is added to the lower hopper, and the distributor is driven to operate. The power drive device of the wet spraying machine drives the distribution wheel to rotate through the transmission shaft, and at the same time, the high-pressure air pipe is transported to the isolation gap in the lower half of the barrel through the air inlet, so that the barrel air pressure below the transmission shaft is greater than the barrel air pressure above the transmission shaft and the air pressure of the sprayer discharge mechanism, and then the slurry to be constructed is transported from the feed port to the barrel, and the slurry transported to the barrel is transported to the barrel. The slurry is carried by the dividing grooves of the dividing wheel and is transferred from the top of the transmission shaft to the bottom of the transmission shaft in sequence through rotation. When the material is transferred to the lower part of the barrel transmission shaft along the dividing groove, the high-pressure airflow in the isolation gap is directly transported to the dividing groove through the air inlet, increasing the material pressure in the dividing groove, so that the material is discharged from the dividing groove under the high-pressure gas transportation and transported from the barrel to the receiving tray through the discharge port. After the sprayed slurry enters the receiving tray, it is pressurized through the high-pressure air pipe and discharged from the discharge pipe for transportation.

7. The method for using the air-sealed wet spraying machine feeding system according to claim 6, characterized in that: In the step S2, the air pressure in the isolation gap of the lower half of the transmission shaft is 1.5-3 times the air pressure of the wet spraying machine discharge mechanism, and the air inlets at both ends of the barrel deliver the same high-pressure gas pressure.

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