Polyurethane polyurea spraying device

Abstract

The application relates to the technical field of spraying devices, in particular to a polyurethane polyurea spraying device, which comprises a spraying machine and a spray gun, the spraying machine comprises two pressure boosting pumps for boosting material, the pressure boosting pump comprises an integrally-formed pump body, an end cover fixedly connected with the pump body, a plunger channel, a discharging channel and a valve channel arranged in the pump body; one end of the plunger channel and the discharging channel is blocked by the end cover, and the other end is communicated through the valve channel; one end of the plunger channel close to the end cover is communicated with the discharging channel through a communication channel, and one end of the discharging channel close to the end cover is connected with a pump outlet; the valve channel is connected with a pump inlet, and one-way valve one and one-way valve two are arranged in the valve channel; a plunger is movably connected in the plunger channel, and the plunger is drivingly connected with a pressure boosting pump power device; the pressure boosting pump of the application is provided with the integrally-formed pump body, the constituent parts of the pressure boosting pump are reduced, the stability of the pressure boosting pump during use is stronger, and the service life is longer.

Description

Technical Field

[0001] This invention relates to the field of spraying equipment technology, specifically a polyurethane / polyurea spraying device. Background Technology

[0002] Both polyurethane and polyurea are composed of two liquid chemical raw materials. Polyurethane / polyurea spraying equipment includes a spraying machine and a spray gun. During spraying, the two liquid chemical raw materials need to be pressurized and heated by the spraying machine before entering the spray gun for mixing and reaction before spraying. Existing spraying machines include a booster pump and a discharge block, which controls the flow direction and adjusts the flow rate of the material. The disadvantages of existing polyurethane / polyurea spraying equipment are: 1. The booster pump has many components, making assembly precision difficult, resulting in poor stability and short lifespan during use; 2. The discharge block can only control the flow direction of the material, not the gas used in the spraying device; 3. The spray gun lacks a regulating valve, making it impossible to adjust the flow rate of the material entering the spray gun's mixing chamber. Summary of the Invention

[0003] The main objective of this invention is to provide a polyurethane / polyurea spraying device to solve the problems in the prior art, such as the large number of components in the booster pump, the difficulty in ensuring assembly accuracy during assembly, the fact that the discharge block can only control the flow direction of the material but cannot control and regulate the gas used in the spraying device, and the lack of a regulating valve on the spray gun, making it impossible to regulate the flow rate of the material entering the mixing chamber of the spray gun.

[0004] To achieve the above objectives, the present invention provides a polyurethane / polyurea spraying device, including a spraying machine and a spray gun. The spraying machine includes two booster pumps for pressurizing the material. Each booster pump includes an integrally formed pump body and an end cap fixedly connected to the pump body. The pump body is provided with a plunger channel, a discharge channel, and a valve channel. One end of the plunger channel and the discharge channel is blocked by the end cap, and the other end is connected through the valve channel. The end of the plunger channel near the end cap is connected to the discharge channel through a connecting channel, and the end of the discharge channel near the end cap is connected to a pump outlet. The valve channel is connected to a pump inlet, and a one-way valve and a two-way valve are provided in the valve channel. A plunger is movably connected in the plunger channel, and the booster pump power unit is driven by the plunger.

[0005] Furthermore, a sliding sleeve is fixedly connected inside the plunger channel, and a sealing ring is provided between the sliding sleeve and the plunger channel, so that the plunger and the inner wall of the sliding sleeve are slidably and sealingly connected.

[0006] Furthermore, the one-way valve includes a ball cage, which has an inlet at the bottom, an outlet at the top, and an opening at the side; a ball is movably connected inside the ball cage, and a spring is connected to the top of the ball; the one-way valve includes a ball cage, which has an inlet at the bottom, a closed top, and an outlet at the side; a ball is movably connected inside the ball cage, and a spring is connected to the top of the ball.

[0007] Furthermore, the spraying machine includes a discharge block, which comprises a material channel 1, a material channel 2, and a gas channel that are separated from each other. The gas channel is equipped with a gas inlet, a gas outlet 1, a gas outlet 2, and a gas outlet 3. The gas inlet is connected to a gas source via a pipe, and a pneumatic lifting pump 1 is connected to gas outlet 1 via a pipe. A pneumatic lifting pump 2 is connected to gas outlet 2 via a pipe. The spray gun is connected to gas outlet 3 via a pipe. Gas outlet 1 and gas outlet 2 are equipped with gas outlet regulating valves.

[0008] Furthermore, the spraying machine includes a material bin 1 and a material bin 2. Material bin 1 is connected to a pneumatic lifting pump 1 via a pipe. Pneumatic lifting pump 1 is connected to a booster pump, which is connected to a heater 1 via a pipe. Heater 1 is connected to a material channel 1 via a pipe. Material channel 1 is connected to a connector 1. Material bin 2 is connected to a pneumatic lifting pump 2 via a pipe. Pneumatic lifting pump 2 is connected to another booster pump via a pipe. This booster pump is connected to a heater 2 via a pipe. Heater 2 is connected to a material channel 2, which is connected to a connector 2.

[0009] Furthermore, the booster pump power unit is a double-headed hydraulic cylinder; the spraying machine includes a base, on which a main support frame and an oil tank are fixedly connected, the double-headed hydraulic cylinder is fixedly connected to the front of the main support frame, and heater one and heater two are fixedly connected to the left and right sides of the main support frame; the oil tank is connected to an oil pump through a pipeline, the oil pump is connected to a hydraulic oil reversing valve through a pipeline, and the hydraulic oil reversing valve is connected to the double-headed hydraulic cylinder.

[0010] Furthermore, a cleaning fluid pump is fixedly connected to the rear side of the main support frame.

[0011] Furthermore, the spray gun includes a gun body, inside which a mixing chamber is movably connected. Two columnar filter frames are symmetrically arranged on the left and right sides of the gun body, and the sides of the filter frames are tightly fitted to the gun body. The filter frames are provided with external grooves and internal holes, which are connected through multiple filter frame holes. A filter screen is sleeved on the outside of the external groove. A friction pair is slidably sealed inside the internal hole, and the friction pair is provided with a friction pair through hole. One end of the friction pair abuts against the mixing chamber, and the other end is connected to a spring three for pressing the friction pair tightly against the mixing chamber. The internal hole includes a first internal hole and a second internal hole, which are connected through a conical hole. An adjusting column is threaded inside the first internal hole, and the end of the adjusting column has a conical head that is movably connected inside the conical hole. The mixing chamber is provided with a mixing cavity inside, and a nozzle is provided at the front end of the mixing cavity. Mixing cavity feed ports are provided on the left and right sides of the mixing cavity.

[0012] Furthermore, a spray gun power cylinder is fixedly connected to the rear end of the gun body, and the spray gun power cylinder includes a piston rod; the end of the piston rod is fixedly connected to a mixing chamber.

[0013] Furthermore, the adjusting column is provided with a first connecting section and a second connecting section. One end of the first connecting section is connected to a tapered head, and the other end is connected to the second connecting section. The first connecting section is slidably sealed to the first inner hole, and the second connecting section is threadedly connected to the first inner hole.

[0014] The booster pump of the present invention reduces the number of components by setting an integrally molded pump body, which reduces the difficulty of assembly, ensures the assembly accuracy, and makes the booster pump more stable and longer in use. Due to the limitations of the integral molding process, the surface finish of the plunger channel is relatively low. The present invention is equipped with a sliding sleeve tube, the inner wall of which has a higher surface finish, thereby ensuring a sliding and sealing connection with the plunger.

[0015] This invention features a discharge block with material and gas channels, enabling control of both material and gas flow, as well as flow rate regulation, resulting in enhanced integration. Furthermore, by incorporating an outlet regulating valve, the gas supply pressure of the lifting pump can be adjusted based on the viscosity of the raw material, which is affected by ambient temperature, ensuring the pump can supply the booster pump with the raw material from the hopper.

[0016] This invention, by setting an adjusting column and a conical hole, can adjust the flow rate of materials entering the mixing chamber through the filter screen frame; and the flow rates of the two materials entering the mixing chamber can be adjusted separately; the adjusting column of this invention is installed at the position of the filter screen frame, making the spray gun structure compact, and the adjusting column is convenient to use and disassemble; and the adjusting column is very close to the mixing chamber, resulting in good adjustment effect. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a cross-sectional view of the booster pump and the double-headed hydraulic cylinder in the embodiment;

[0019] Figure 2 This is a cross-sectional view of the booster pump in the embodiment;

[0020] Figure 3 This is a three-dimensional structural diagram of one-way valve one and one-way valve two in the embodiment;

[0021] Figure 4 This is a cross-sectional view of one-way valve one and one-way valve two in the embodiment;

[0022] Figure 5 This is a schematic diagram of the structure of material channel one and material channel two in the embodiment;

[0023] Figure 6 This is a schematic diagram of the gas channel in the embodiment;

[0024] Figure 7 This is a front view schematic diagram of the structure of pneumatic lifting pump one and pneumatic lifting pump two in the embodiment;

[0025] Figure 8 This is a top view of the structure of pneumatic lifting pump one and pneumatic lifting pump two in the embodiment;

[0026] Figure 9 This is a three-dimensional structural diagram of the spraying machine in the embodiment;

[0027] Figure 10 This is a schematic diagram of the main structure of the spraying machine in the embodiment;

[0028] Figure 11 This is a side view of the spraying machine in the embodiment;

[0029] Figure 12 This is a cross-sectional view of the gun body and cylinder in the embodiment;

[0030] Figure 13 This is a cross-sectional view of the filter frame in the embodiment;

[0031] Figure 14 This is a front view of the filter frame structure in the embodiment;

[0032] Figure 15 This is a front view schematic diagram of the spray gun in the embodiment;

[0033] In the diagram: 1. Booster pump; 101. Pump body; 102. Plunger channel; 103. Discharge channel; 104. Valve channel; 105. End cover; 106. Connecting channel; 107. Pump outlet; 108. Pump inlet; 109. Check valve one; 109a. Ball cage one; 109b. Cage one inlet; 109c. Cage one outlet; 109d. Cage one opening; 109e. Ball one; 109f. Spring one; 1010. Check valve two; 1010a. Ball cage two; 1010b. Cage 1. Inlet 2; 1010c, Outlet 2 of Cage 2; 1010d, Ball 2; 1010e, Spring 2; 1011, Plunger; 1012, Plunger Rod; 1013, Sliding Sleeve; 1014, Sealing Ring; 2. Gas Regulating Valve; 3. Pneumatic Material Lifting Pump 1; 301, Material Lifting Plunger Pump; 302, Material Lifting Cylinder; 303, Gas Reversing Valve; 4. Pneumatic Material Lifting Pump 2; 5. Discharge Block; 501, Material Channel 1; 502, Material Channel 2; 503, Gas Channel; 503a, Gas Inlet 503b, Gas Outlet 1; 503c, Gas Outlet 2; 503d, Gas Outlet 3; 6, Gun Body; 7, Mixing Chamber; 701, Mixing Chamber; 702, Nozzle; 703, Mixing Chamber Inlet; 8, Filter Frame; 801, External Groove; 802, First Inner Hole; 803, Second Inner Hole; 804, Conical Hole; 805, Filter Frame Hole; 9, Connector 1; 10, Connector 2; 11, Heater 1; 12, Heater 2; 13, Spray Gun Power Cylinder; 1301, Piston Rod 14. Spray gun feed block; 1401. Spray gun feed tube interface; 15. Main support frame; 16. Oil tank; 17. Oil pump; 18. Hydraulic oil reversing valve; 19. Base; 20. Cleaning fluid pump; 21. Material box one; 22. Material box two; 23. Filter screen; 24. Friction pair; 2401. Friction pair through hole; 25. Spring three; 26. Adjusting column; 2601. Conical head; 2602. Adjusting knob; 2603. First connecting section; 2604. Second connecting section; 27. Double-headed hydraulic cylinder. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] like Figure 1 , Figure 2 , Figure 9As shown, according to an embodiment of the present invention, a polyurethane / polyurea spraying device is provided, including a spraying machine and a spray gun. The spraying machine includes two booster pumps 1 for pressurizing the material. Each booster pump 1 includes an integrally formed pump body 101 and an end cap 105 fixedly connected to the pump body 101. The pump body 101 and the end cap 105 are made of 45# steel. The pump body 101 is provided with a plunger channel 102, a discharge channel 103, and a valve channel 104. The pump body 101 is integrally formed using a machining center. One end of the plunger channel 102 and the discharge channel 103 is blocked by the end cap 105, and the other end is connected through the valve channel 104. The end of the plunger channel 102 near the end cap 105 is connected through a connecting... The passage 106 is connected to the discharge passage 103, and the end of the discharge passage 103 near the end cover 105 is connected to the pump outlet 107; the valve passage 104 is connected to the pump inlet 108, and the valve passage 104 is equipped with a first check valve 109 and a second check valve 1010; the first check valve 109 is used to allow the material to flow from the pump inlet 108 to the valve passage 104, and the second check valve 1010 is used to allow the material to flow from the valve passage 104 to the discharge passage 103; the plunger passage 102 is slidably and sealingly connected to the plunger 1011, and the plunger 1011 is fixedly connected to the plunger rod 1012, which is slidably and sealingly connected to the end cover 105; the plunger rod 1012 is connected to the booster pump power unit.

[0036] like Figure 1 and Figure 2 As shown, the working steps of booster pump 1 are as follows:

[0037] Step 1: The plunger 1011 moves toward the end cap 105, the one-way valve 109 opens, and the one-way valve 2 1010 closes; the material in the feed pipe enters the valve channel 104 through the pump inlet 108 and the one-way valve 109, and enters the plunger channel 102 at the end near the valve channel 104.

[0038] Step 2: The plunger 1011 moves away from the end cap 105, the one-way valve 109 closes, and the one-way valve 2 1010 opens; the material at the end of the plunger channel 102 near the valve channel 104 enters the discharge channel 103 from the valve channel 104, and then enters the end of the plunger channel 102 near the end cap 105.

[0039] Step 3, Figure 2 The arrow inside the booster pump 1 indicates the direction of material flow. The plunger 1011 moves again toward the end cover 105, the one-way valve 109 opens, and the one-way valve 2 1010 closes. The material in the feed pipe enters the valve channel 104 and enters the plunger channel 102 near the end of the valve channel 104. Part of the material at the end of the plunger channel 102 near the end cover 105 enters the discharge channel 103, and the other part is discharged from the pump outlet 107.

[0040] Step 4, Figure 1 The arrow inside the booster pump 1 indicates the direction of material flow. The plunger 1011 moves away from the end cover 105 again, the one-way valve 109 closes, and the one-way valve 2 1010 opens. The material at the end of the plunger channel 102 near the valve channel 104 enters the discharge channel 103 from the valve channel 104. Part of it enters the end of the plunger channel 102 near the end cover 105, and the other part is discharged from the pump outlet 107.

[0041] Repeat steps 3 and 4. During the reciprocating motion of plunger 1011, material is continuously discharged from pump outlet 107.

[0042] like Figure 2 As shown, a sliding sleeve 1013 is fixedly connected inside the plunger channel 102. The sliding sleeve 1013 is made of stainless steel, and the roughness of the inner hole of the sliding sleeve 1013 is 0.6, and the cylindricity is grade 6. A sealing ring 1014 is provided between the sliding sleeve 1013 and the plunger channel 102, and the plunger 1011 is slidably and sealingly connected to the inner wall of the sliding sleeve 1013.

[0043] like Figures 2-4 As shown, the one-way valve 109 includes a ball cage 109a, with a cage inlet 109b at the bottom, a cage outlet 109c at the top, and a cage opening 109d on the side; a ball 109e is movably connected inside the ball cage 109a, and a spring 109f is connected to the top of the ball 109e; the one-way valve 1010 includes a ball cage 1010a, with a cage inlet 1010b at the bottom, a closed top, and a cage outlet 1010c on the side; a ball 1010d is movably connected inside the ball cage 1010a, and a spring 1010e is connected to the top of the ball 1010d.

[0044] like Figures 5-8 As shown, the spraying machine includes a discharge block 5, which includes a material channel 501, a material channel 502, and a gas channel 503 that are separated from each other. The gas channel 503 is located above the material channel 501 and the material channel 502. The gas channel 503 is provided with a gas inlet 503a, a gas outlet 503b, a gas outlet 503c, and a gas outlet 503d. The gas inlet 503a is connected to a gas source through a pipe. The gas outlet 503b is connected to a pneumatic lifting pump 3 through a pipe. The gas outlet 503c is connected to a pneumatic lifting pump 4 through a pipe. The gas outlet 503d is connected to a spray gun through a pipe. Gas outlet regulating valves 2 are provided at the gas outlets 503b and 503c.

[0045] like Figure 7As shown, both the pneumatic lifting pump 3 and the pneumatic lifting pump 4 include a lifting plunger pump 301, a lifting cylinder 302 that provides power to the lifting plunger pump 301, and a gas reversing valve 303 for reversing the gas direction in the lifting cylinder 302.

[0046] like Figures 7-11 The spraying machine includes a material bin 1 21 and a material bin 22. Material bin 1 21 is connected to a pneumatic lifting pump 1 3 via a pipe. The pneumatic lifting pump 1 3 is connected to a booster pump 1 via a pipe. The booster pump 1 1 is connected to a heater 11 via a pipe. The heater 11 1 is connected to a material channel 501 via a pipe. The material channel 501 is connected to a connector 1 9. Material bin 2 22 is connected to a pneumatic lifting pump 2 4 via a pipe. The pneumatic lifting pump 2 4 is connected to another booster pump 1 via a pipe. The booster pump 1 1 is connected to a heater 2 12 via a pipe. The heater 2 12 is connected to a material channel 2 502. The material channel 2 502 is connected to a connector 2 10.

[0047] Both material bin 1 (21) and material bin 2 (22) are equipped with stirring rods inside and stirring motors on top.

[0048] The flow of materials inside the spraying machine is as follows: Material 1 is stored in material bin 21. After being lifted by pneumatic lifting pump 3, material 1 enters one of the booster pumps 1 for pressurization. After pressurization, it enters heater 11 for heating. After heating, it enters material 1 channel 501, then enters the pipeline through connector 9 and finally enters the spray gun. Material 2 is stored in material bin 22. After being lifted by pneumatic lifting pump 4, material 2 enters another booster pump 1 for pressurization. After pressurization, it enters heater 12 for heating. After heating, it enters material 2 channel 502, then enters the pipeline through connector 10 and finally enters the spray gun. Material 1 and material 2 are mixed in the spray gun and then sprayed out.

[0049] like Figure 1 , such as 9- Figure 11 As shown, the booster pump power unit is a double-headed hydraulic cylinder 27. The two ends of the hydraulic cylinder piston rod of the double-headed hydraulic cylinder 27 are respectively connected to the plunger rods 1012 of the two booster pumps 1. The double-headed hydraulic cylinder 27 drives the plunger rods 1012 to reciprocate. The spraying machine includes a base 19. A main support frame 15 and an oil tank 16 are fixedly connected to the base 19. The double-headed hydraulic cylinder 27 is fixedly connected to the front of the main support frame 15. Heater 11 and Heater 22 are fixedly connected to the left and right sides of the main support frame 15. The oil tank 16 is connected to an oil pump 17 through a pipeline. The oil pump 17 is connected to a hydraulic oil reversing valve 18 through a pipeline. The hydraulic oil reversing valve 18 is connected to the double-headed hydraulic cylinder 27.

[0050] like Figures 12-14As shown, the spray gun includes a gun body 6, with a mixing chamber 7 movably connected inside the gun body 6. Two columnar filter frames 8 are symmetrically arranged on the left and right sides of the gun body 6, and the sides of the filter frames 8 are tightly fitted to the gun body 6. The filter frames 8 are provided with an external groove 801 and an internal hole, which are connected through multiple filter frame holes 805. A filter screen 23 is sleeved on the outside of the external groove 801. A friction pair 24 is slidably and sealingly connected inside the internal hole, and the friction pair 24 has a friction pair through hole 2401. One end of the friction pair 24 abuts against the mixing chamber 7, and the other end is connected to... There is a spring 25 for pressing the friction pair 24 against the mixing chamber 7; the internal hole includes a first internal hole 802 and a second internal hole 803, which are connected by a tapered hole 804; an adjusting column 26 is internally threaded into the first internal hole 802, and the end of the adjusting column 26 has a tapered head 2601, which is movably connected in the tapered hole 804; the mixing chamber 7 is provided with a mixing cavity 701 inside, a nozzle 702 is provided at the front end of the mixing cavity 701, and mixing cavity feed inlets 703 are provided on the left and right sides of the mixing cavity 701.

[0051] like Figure 12 and Figure 15 As shown, a spray gun power cylinder 13 is fixedly connected to the rear end of the gun body 6. The spray gun power cylinder 13 includes a piston rod 1301; the end of the piston rod 1301 is fixedly connected to the mixing chamber 7.

[0052] The spray gun power cylinder 13 is used to control the opening and closing of the spray gun. The principle is as follows:

[0053] When the piston rod 1301 of the spray gun power cylinder 13 retracts, the friction pair through hole 2401 and the mixing chamber inlet 703 overlap, and the spray gun starts spraying; when the piston rod 1301 of the spray gun power cylinder 13 extends, the friction pair through hole 2401 and the mixing chamber inlet 703 are misaligned, and the spray gun stops spraying.

[0054] like Figure 13 As shown, the adjusting column 26 is provided with a first connecting section 2603 and a second connecting section 2604. One end of the first connecting section 2603 is connected to the conical head 2601, and the other end is connected to the second connecting section 2604. The first connecting section 2603 is slidably sealed to the first inner hole 802, and the second connecting section 2604 is threaded to the first inner hole 802. An adjusting knob 2602 is provided at the end of the adjusting column 26 away from the conical head 2601.

[0055] like Figure 15 As shown, a spray gun feed block 14 is fixedly connected to the lower part of the gun body 6. The spray gun feed block 14 is provided with a spray gun material pipe interface 1401. Both the gun body 6 and the spray gun feed block 14 are provided with internal channels. The spray gun material pipe interface 1401 is connected to the external groove 801 through the internal channels.

[0056] The material flow path of the spray gun is as follows: the material first enters the internal channel through the spray gun material pipe interface 1401, then enters the external groove 801, and enters the first inner hole 802 through the filter frame hole 805; then it passes through the conical hole 804 and enters the second inner hole 803; finally, it enters the mixing chamber 701 through the friction pair through hole 2401 and the mixing chamber inlet 703; after the two materials are mixed in the mixing chamber 701, they are sprayed out from the nozzle 702.

[0057] like Figures 9-11 As shown, in some embodiments, a cleaning fluid pump 20 is fixedly connected to the rear side of the main support frame 15; the cleaning fluid pump 20 is used to pressurize the cleaning fluid and send it to the spray gun to flush the internal channels of the spray gun.

[0058] The booster pump 1 in the above embodiment reduces the number of components by setting an integrally formed pump body 101, which reduces the difficulty of assembly and ensures the accuracy of assembly. This makes the booster pump 1 more stable and longer in use. Due to the limitations of the integral forming process, the surface finish of the plunger channel 102 is relatively low. The above embodiment is provided with a sliding sleeve 1013. The inner wall of the sliding sleeve 1013 has a higher surface finish and a higher cylindricity, thereby ensuring a sliding and sealing connection with the plunger 1011 and extending the service life of the booster pump 1.

[0059] The above embodiment, by setting up a discharge block 5, and setting up a material channel and a gas channel 503 in the discharge block 5, can control the flow direction of the material and the flow direction and flow rate of the gas, thus achieving higher integration; by setting up an exhaust regulating valve 2, the air supply pressure of the pneumatic lifting pump 3 and the pneumatic lifting pump 4 can be increased or decreased according to the viscosity of the raw material affected by the ambient temperature, so that the lifting pump can normally supply the raw material in the material box to the booster pump 1.

[0060] The above embodiment includes an adjusting column 26 and a conical hole 804. By rotating the adjusting column 26, the gap between the conical head 2601 and the conical hole 804 can be changed, thereby adjusting the flow rate of the material entering the mixing chamber 7 through the filter frame 8. The flow rates of the two materials entering the mixing chamber 7 can be adjusted independently. The adjusting column 26 is installed at the position of the filter frame 8, making the spray gun structure compact. The adjusting column 26 is easy to use and disassemble. Furthermore, the adjusting column 26 is very close to the mixing chamber 701, resulting in good adjustment effect.

[0061] The applicable scenarios for the material flow rate adjustment function of the spray gun in the above embodiments are as follows:

[0062] 1. When the viscosity of two raw materials in a 1:1 ratio formula differs significantly, and heating to reduce viscosity cannot completely achieve the required ratio, this spray gun can be used to adjust and control the flow rate of the raw materials to achieve the designed ratio.

[0063] 2. Applicable to raw materials with differentiated formulations that are not in a 1:1 ratio.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A polyurethane / polyurea spraying device, comprising a spraying machine and a spray gun, wherein the spraying machine includes two booster pumps (1) for pressurizing the material, characterized in that, The booster pump (1) includes an integrally formed pump body (101) and an end cap (105) fixedly connected to the pump body (101). The pump body (101) is provided with a plunger channel (102), a discharge channel (103), and a valve channel (104). One end of the plunger channel (102) and the discharge channel (103) is blocked by the end cap (105), and the other end is connected through the valve channel (104). The end of the plunger channel (102) near the end cap (105) is connected to the discharge channel (103) through a connecting channel (106). The end of the discharge channel (103) near the end cap (105) is connected to the discharge channel (103). One end of the cover (105) is connected to the pump outlet (107); the valve channel (104) is connected to the pump inlet (108), and the valve channel (104) is provided with a one-way valve (109) and a one-way valve (1010); the one-way valve (109) is used to allow the material to flow from the pump inlet (108) to the valve channel (104), and the one-way valve (1010) is used to allow the material to flow from the valve channel (104) to the discharge channel (103); a plunger (1011) is movably connected in the plunger channel (102), and the plunger (1011) is driven to a booster pump power unit; The first one-way valve (109) includes a ball cage (109a), which has a cage inlet (109b) at the bottom, a cage outlet (109c) at the top, and a cage opening (109d) on the side; a ball (109e) is movably connected inside the ball cage (109a), and a spring (109f) is connected to the top of the ball (109e); the second one-way valve (1010) includes a ball cage (1010a), which has a cage inlet (1010b) at the bottom, is closed at the top, and has a cage outlet (1010c) on the side; a ball (1010d) is movably connected inside the ball cage (1010a), and a spring (1010e) is connected to the top of the ball (1010d).

2. The polyurethane polyurea spraying apparatus as described in claim 1, characterized in that, A sliding sleeve (1013) is fixedly connected inside the plunger channel (102). A sealing ring (1014) is provided between the sliding sleeve (1013) and the plunger channel (102). The plunger (1011) is slidably and sealingly connected to the inner wall of the sliding sleeve (1013).

3. The polyurethane polyurea spraying apparatus as described in claim 1, characterized in that, The spraying machine includes a discharge block (5), which includes a material channel 1 (501), a material channel 2 (502), and a gas channel (503) that are separated from each other. The gas channel (503) is provided with a gas inlet (503a), a gas outlet 1 (503b), a gas outlet 2 (503c), and a gas outlet 3 (503d). The gas inlet (503a) is connected to a gas source through a pipe. The gas outlet 1 (503b) is connected to a pneumatic material lifting pump 1 (3) through a pipe. The gas outlet 2 (503c) is connected to a pneumatic material lifting pump 2 (4) through a pipe. The gas outlet 3 (503d) is connected to a spray gun through a pipe. Gas outlet 1 (503b) and gas outlet 2 (503c) are provided with gas outlet regulating valves (2).

4. The polyurethane / polyurea spraying apparatus as described in claim 3, characterized in that, The spraying machine includes a material bin one (21) and a material bin two (22). The material bin one (21) is connected to a pneumatic material lifting pump one (3) via a pipe. The pneumatic material lifting pump one (3) is connected to a booster pump (1). This booster pump (1) is connected to a heater one (11) via a pipe. The heater one (11) is connected to a material channel one (501) via a pipe. The material channel one (501) is connected to a connector one (9). The material bin two (22) is connected to a pneumatic material lifting pump two (4) via a pipe. The pneumatic material lifting pump two (4) is connected to another booster pump (1) via a pipe. This booster pump (1) is connected to a heater two (12) via a pipe. The heater two (12) is connected to a material channel two (502). The material channel two (502) is connected to a connector two (10).

5. The polyurethane polyurea spraying apparatus as described in claim 4, characterized in that, The booster pump power unit is a double-headed hydraulic cylinder (27); the spraying machine includes a base (19), on which a main support frame (15) and an oil tank (16) are fixedly connected; the double-headed hydraulic cylinder (27) is fixedly connected to the front of the main support frame (15); the heater one (11) and the heater two (12) are fixedly connected to the left and right sides of the main support frame (15); the oil tank (16) is connected to an oil pump (17) through a pipe; the oil pump (17) is connected to a hydraulic oil reversing valve (18) through a pipe; and the hydraulic oil reversing valve (18) is connected to the double-headed hydraulic cylinder (27).

6. The polyurethane polyurea spraying apparatus as described in claim 5, characterized in that, A cleaning fluid pump (20) is fixedly connected to the rear side of the main support frame (15).

7. The polyurethane polyurea spraying apparatus as described in claim 1, characterized in that, The spray gun includes a gun body (6), and a mixing chamber (7) is movably connected inside the gun body (6). Two columnar filter frames (8) are symmetrically arranged on the left and right sides of the gun body (6), and the sides of the filter frames (8) are tightly fitted to the gun body (6). The filter frames (8) are provided with an external groove (801) and an internal hole. The external groove (801) and the internal hole are connected through multiple filter frame holes (805). A filter screen (23) is sleeved on the outside of the external groove (801). A friction pair (24) is slidably sealed inside the internal hole. The friction pair (24) is provided with a friction pair through hole (2401). One end of the friction pair (24) abuts against the mixing chamber (7), and the other end is connected to a useful... A spring three (25) is provided to make the friction pair (24) fit tightly against the mixing chamber (7); the internal hole includes a first internal hole (802) and a second internal hole (803), the first internal hole (802) and the second internal hole (803) are connected through a tapered hole (804); an adjusting column (26) is threadedly connected to the first internal hole (802), the end of the adjusting column (26) has a tapered head (2601), the tapered head (2601) is movably connected in the tapered hole (804); the mixing chamber (7) is provided with a mixing cavity (701) inside, the front end of the mixing cavity (701) is provided with a nozzle (702), and the left and right sides of the mixing cavity (701) are provided with mixing cavity inlets (703).

8. The polyurethane polyurea spraying apparatus as described in claim 7, characterized in that, The rear end of the gun body (6) is fixedly connected to a spray gun power cylinder (13), which includes a piston rod (1301); the end of the piston rod (1301) is fixedly connected to a mixing chamber (7).

9. The polyurethane polyurea spraying apparatus as described in claim 7, characterized in that, The adjusting column (26) is provided with a first connecting section (2603) and a second connecting section (2604). One end of the first connecting section (2603) is connected to the conical head (2601), and the other end is connected to the second connecting section (2604). The first connecting section (2603) is slidably sealed to the first inner hole (802), and the second connecting section (2604) is threadedly connected to the first inner hole (802).

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