Spraying machine

Abstract

The utility model belongs to the technical field of spraying machines, and particularly relates to a spraying machine. The spraying machine comprises two material tanks, one material tank is a black material tank used for containing black materials, the other material tank is a white material tank used for containing white materials, the material tanks are of a double-layer structure, constant-temperature oil is contained in an interlayer of each material tank, each material tank is provided with an electronic pressure sensor, a mechanical pressure gauge and a safety valve, and a feeding pipe and a discharging pipe are installed at the bottom of each material tank. A diaphragm pump is installed at the end, close to the charging bucket, of the feeding pipe, a plate heat exchanger, a metering pump and a flowmeter are installed on the discharging pipe, a hydraulic plate type reversing valve is installed at the end, away from the charging bucket, of the discharging pipe, a gun head is installed at one end of the hydraulic plate type reversing valve, and the other end of the hydraulic plate type reversing valve is communicated with the charging bucket through a pipeline. The spraying machine solves the problems that an existing spraying machine is unstable in pressure, inconstant in temperature and incapable of automatically supplementing materials according to requirements.

Description

Technical Field

[0001] The utility model belongs to the technical field of spraying machines, in particular to a spraying machine. Background Art

[0002] At present, high-pressure sprayers are widely used in the field of polyurethane spray foaming, but the existing sprayers have unstable pressure and unstable temperature, cannot automatically refill materials according to demand, and the temperature cannot be increased in time after refilling.

[0003] The automatic feeding control system, temperature control system, pressure control system, flow control system, and remote mixing control system are all open control systems and cannot form a closed-loop detection control. During production, the polyurethane spray foaming speed is not constant, the foaming density is not uniform, the spraying width is unstable, and the polyurethane spraying surface is uneven and has troughs due to flow fluctuations. Utility Model Content

[0004] The utility model provides a spraying machine, which solves the problems of unstable pressure, unstable temperature and failure to automatically refill materials according to demand in the existing spraying machines.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A spraying machine comprises two material tanks, wherein one material tank is a black material tank for containing black material, and the other material tank is a white material tank for containing white material. The material tanks are of a double-layer structure, and the interlayer of the material tanks contains constant temperature oil. An electronic pressure sensor, a mechanical pressure gauge and a safety valve are installed on the top of the material tank, and a feed pipe and a discharge pipe are installed on the bottom of the material tank. A diaphragm pump is installed on the end of the feed pipe close to the material tank, and a plate heat exchanger, a metering pump and a flow meter are installed on the discharge pipe. A hydraulic plate-type reversing valve is installed on the end of the discharge pipe away from the material tank, and a gun head is installed on one end of the hydraulic plate-type reversing valve, and the other end of the hydraulic plate-type reversing valve is connected to the material tank through a pipeline.

[0007] Through the above technical solution, the diaphragm pump presses the raw materials into the two material tanks, and the material tanks detect the pressure inside the material tanks in real time through triple pressure monitoring, so that the diaphragm pump can automatically adjust the raw materials entering the material tanks according to the pressure inside the material tanks, and realize automatic replenishment of the supply amount according to the amount used, and the raw material supply amount is easy to control. Constant temperature oil and plate heat exchanger can perform double insulation control on the raw materials, so that the temperature of the raw materials remains constant, improving the foaming uniformity and foaming effect. The hydraulic plate reversing valve can change the direction of the raw materials, so that the excess raw materials that do not need foaming are returned to the material tank for recycling.

[0008] Optionally, one end of the feed pipe away from the material tank is connected to a raw material barrel.

[0009] Through the above technical solution, the raw material barrel is used to hold the raw materials, which makes it convenient for the diaphragm pump to press the raw materials into the material tank in real time.

[0010] Optionally, a stirring mechanism is installed on the top of the material tank, and the stirring mechanism includes a motor and a stirring paddle. The stirring paddle is located inside the material tank, and the output shaft of the motor is drivingly connected to the end of the stirring paddle.

[0011] Through the above technical solution, the stirring mechanism can stir the raw materials inside the material tank, improve the uniformity of the raw materials, and enable all the raw materials to be evenly heated when the constant temperature oil heats the raw materials.

[0012] Optionally, the material tank includes an inner tank and an outer tank, the outer tank is arranged on the outside of the inner tank, the interlayer between the outer tank and the inner tank contains constant temperature oil, the constant temperature oil controls the heating temperature through a heating temperature control system, and a thermal insulation layer is arranged on the outside of the outer tank.

[0013] Through the above technical scheme, the material tank includes an inner tank and an outer tank, the inner tank is used to hold raw materials, and the interlayer between the outer tank and the inner tank is used to hold constant temperature oil. It can not only heat the raw materials in the material tank, but also extend the insulation time and insulation effect of the raw materials. The heating temperature control system can automatically control the heating of the constant temperature oil to improve the heating effect.

[0014] Optionally, the discharge pipe is installed with a self-cleaning filter and an oil filter, the self-cleaning filter is located at one end of the discharge pipe close to the material tank, and the oil filter is located at one end of the discharge pipe away from the material tank.

[0015] Through the above technical solution, the self-cleaning filter and the oil filter can perform double filtering and cleaning on the raw materials, remove crystals and impurities in the raw materials, improve the cleanliness of the raw materials, and help improve the subsequent foaming quality and foaming effect.

[0016] Optionally, one end of the discharge pipe away from the material tank is connected to a spray pipeline, the end of the spray pipeline is installed with the hydraulic plate type reversing valve, and the hydraulic plate type reversing valve and the gun head are respectively connected to the hydraulic station through pipelines.

[0017] Through the above technical scheme, the spray pipeline can transport the raw materials to the hydraulic plate reversing valve, and the hydraulic plate reversing valve can transport the raw materials to the gun head for spraying through steering. It can also transport the remaining raw materials back to the material tank, thereby improving the recycling rate of the raw materials and reducing costs. The hydraulic station provides power for the hydraulic plate reversing valve and the gun head, thereby realizing the steering transportation and spraying operations of the raw materials.

[0018] Optionally, the metering pump and the flow meter are both connected via a PLC control system.

[0019] Through the above technical solution, the metering pump and the flow meter cooperate with each other to accurately control the flow and pressure of the raw materials, ensure the stability and safety of the spraying process, and the spraying flow is easy to control.

[0020] Optionally, the outside of the discharge pipe and the spray pipeline are both wrapped with a heating tape.

[0021] Through the above technical solution, the heating tape can ensure that the temperature of the raw materials remains consistent from the time they come out of the material tank until they enter the gun head, thereby reducing the heat loss of the raw materials during transportation.

[0022] After adopting the above technical solution, the beneficial effects of the utility model are:

[0023] The present invention adopts an electronic pressure sensor, a mechanical pressure gauge and a safety valve to perform triple pressure monitoring on the material tank, so that the pressure inside the material tank is more constant. The material tank adopts a circulating feeding method, and the discharge temperature is more stable. The diaphragm pump can automatically adjust the feeding of the material tank to realize on-demand feeding. The constant temperature oil and the plate heat exchanger can double heat the raw materials, so that the temperature of the raw materials is more constant and controllable. The two balance the raw material temperature. The metering pump and the flow meter cooperate with each other, so that the flow regulation and flow feedback cooperate with each other to ensure the discharge stability of the raw materials. The self-cleaning filter and the oil filter can make the raw materials purer and the discharge smoother. The discharge pipe and the spray pipeline are both provided with heating belts to ensure the stable discharge temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 The three-dimensional spraying machine in the embodiment Figure Ⅰ ;

[0026] Figure 2 The three-dimensional spraying machine in the embodiment Figure II .

[0027] Explanation of the accompanying drawings: 1. Material tank; 2. Stirring mechanism; 3. Raw material barrel; 4. Feed pipe; 5. Diaphragm pump; 6. Self-cleaning filter; 7. Plate heat exchanger; 8. Metering pump; 9. Flow meter; 10. Oil filter; 11. Discharge pipe; 12. Spray pipeline; 13. Hydraulic plate reversing valve; 14. Gun head; 15. Hydraulic station. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The embodiment of the present application discloses a spraying machine.

[0030] Example

[0031] according to Figure 1 to Figure 2 As shown, a spraying machine includes two material tanks 1, one of which is a black material tank and the other is a white material tank. The material input and output and control methods of the black material tank and the white material tank are consistent. Therefore, one of the material tanks 1 is taken as an example to illustrate its structure, material input and output methods and working method.

[0032] An electronic pressure sensor, a mechanical pressure gauge and a safety valve are installed on the top of the tank 1. The triple pressure is used to detect the pressure in the tank 1, which can ensure that the pressure in the tank 1 remains stable. The electronic pressure sensor can automatically display the pressure value in the tank 1. The mechanical pressure gauge is convenient for operators to check the pressure in the tank 1 at any time during the production process; the function of the safety valve is that when the pressure in the tank 1 exceeds the set value, the safety valve will automatically exhaust the air to avoid danger caused by excessive pressure in the tank 1.

[0033] A feed pipe 4 is installed at the bottom of the material tank 1, one end of the feed pipe 4 is connected to a raw material barrel 3, and the other end of the feed pipe 4 is connected to a diaphragm pump 5. The raw material barrel 3 is used to hold the raw material to be sprayed, and the diaphragm pump 5 is used to transport the raw material in the raw material barrel 3 to the inside of the material tank 1. The diaphragm pump 5 adopts pneumatic feeding. When the raw material in the material tank 1 is lower than the pressure setting value, the diaphragm pump 5 will automatically press the raw material into the material tank 1 with pressure. The supply amount is automatically replenished with the amount used, and the raw material supply amount is easy to control.

[0034] A stirring mechanism 2 is provided on the top of the material tank 1, and the stirring mechanism 2 is used to stir the foaming raw materials in the material tank 1. The stirring mechanism 2 includes a motor and a stirring paddle, the stirring paddle is located inside the material tank 1, and the output shaft of the motor is drivingly connected to the end of the stirring paddle.

[0035] The material tank 1 is a double-layer structure, including an inner tank and an outer tank, the outer tank is sleeved outside the inner tank, the inner tank is used to hold foaming raw materials, and the interlayer between the inner tank and the outer tank holds constant temperature oil, which is heated by a heating and temperature control system, and the heating and temperature control system can automatically control the temperature of the constant temperature oil, thereby achieving heating and heat preservation of the raw materials inside the material tank 1. A heat preservation layer is provided outside the material tank 1 to reduce heat loss in the material tank.

[0036] A discharge pipe 11 is installed at the bottom of the material tank 1. The discharge pipe 11 is provided with a self-cleaning filter 6, a plate heat exchanger 7, a metering pump 8, a flow meter 9, and an oil filter 10 in sequence from the direction close to the material tank 1. The end of the discharge pipe 11 is connected to a spraying pipeline 12. A hydraulic plate-type reversing valve 13 is installed at the end of the spraying pipeline 12. A gun head 14 is installed at one end of the hydraulic plate-type reversing valve 13. The other end of the hydraulic plate-type reversing valve 13 is connected to the material tank 1 through a pipeline. A heating belt is wound around the outside of the discharge pipe 11 and the spraying pipeline 12.

[0037] The hydraulic station 15 is connected to the hydraulic plate type reversing valve 13 and the gun head 14 through pipelines. The hydraulic station 15 is used to open or close the gun head 14 and provide execution power to the hydraulic plate type reversing valve 13, so as to control the flow direction of the raw materials.

[0038] The hydraulic station 15 provides power to the large and small pistons on the gun head 14. The large piston of the gun head 14 is seamlessly matched with the discharge port, and requires a large thrust to move. The small piston pressure relief valve mainly plays the role of raw material mixing and cutoff, and the opening and closing time accuracy and reliability of the small piston pressure relief valve are very high.

[0039] The metering pump 8 can adjust the flow rate of the raw material in the discharge pipe 11, thereby adjusting the spraying flow rate of the gun head 14. The metering pump 8 and the flow meter 9 are both connected to the PLC control system. The flow meter 9 feeds back the measured flow value to the PLC control system, and the PLC control system feeds back the flow value to the metering pump 8. The metering pump 8 compares the difference between the flow value and the set flow data, thereby adjusting the flow rate of the raw material. The flow meter 9 can also display the measured flow value on the display screen for easy viewing by the staff. The metering pump 8 cooperates with the flow meter 9 to accurately control the flow and pressure of the raw material, ensure the stability and safety of the spraying process, and the spraying flow is easy to control.

[0040] The PLC control system controls the operation of the entire spraying machine, including feeding, stirring, heating, raw material circulation, pressurization, spraying, etc. The PLC control system, heating temperature control system, stirring mechanism 2, and gun head 14 belong to the prior art, and the specific structure and working principle are not described here.

[0041] Working principle:

[0042] The material tank 1 transports raw materials into the interior through the feed pipe 4, and the diaphragm pump 5 is responsible for feeding the raw materials in the raw material barrel 3 into the material tank 1. When the raw material inside the material tank 1 is lower than the pressure setting value, the diaphragm pump 5 automatically presses the raw material in the raw material barrel 3 into the material tank 1 through pressure. When the raw material pressure inside the material tank 1 is greater than the pressure setting value, the diaphragm pump 5 stops feeding, realizing automatic replenishment of the raw material supply, so that the raw material capacity in the material tank 1 is always maintained within the set range, and the raw material supply is easy to control.

[0043] The raw materials entering the material tank 1 are insulated by the interlayer between the inner tank and the outer tank. The temperature of the thermostatic oil in the interlayer is controlled by the heating temperature control system to achieve heating and insulation of the raw materials in the material tank 1. After the heating temperature control system detects that the temperature in the material tank 1 is lower than the set value, the thermostatic oil is heated, and the thermostatic oil heats the raw materials in the material tank 1 through heat conduction. The stirring mechanism 2 can stir the raw materials in the material tank 1, maintain the temperature balance of the raw materials and prevent the raw materials from crystallizing.

[0044] After the temperature-balanced raw material comes out of the material tank 1, it is filtered by the self-cleaning filter 6 to filter out the crystals and impurities in the raw material, thereby ensuring that the raw material is clean and free of impurities. The raw material enters the plate heat exchanger 7, which can perform secondary constant temperature on the raw material, so that the temperature of the raw material is constant and easy to control. The raw material enters the metering pump 8, which can adjust the flow rate of the raw material. The flow meter 9 is connected to the PLC control system. The flow meter 9 can display the measured flow value on the display screen, which is convenient for the staff to view. The PLC control system feeds back the flow value to the metering pump 8, and the metering pump 8 compares the flow data with the set flow data to adjust the flow rate of the raw material.

[0045] When spraying, the black material in the black material tank and the white material in the white material tank can be directly transported to the hydraulic plate type reversing valve 13 through their respective discharge pipes 11 and reach the gun head 14. The gun head 14 is a high-pressure mixing head that can fully mix the raw materials to obtain the best foaming effect. The gun head 14 sprays outward to complete the foaming. When spraying is not performed, the black material in the black material tank and the white material in the white material tank each reach the hydraulic plate type reversing valve 13, and circulate to their respective material tanks 1 under the action of the hydraulic station 15. The hydraulic station 15 can control the flow direction of the raw material in the hydraulic plate type reversing valve 13, so that the raw material is sprayed out or circulated back to the material tank 1. During the journey of the raw material from the material tank 1 to the gun head 14, the discharge pipe 11 and the spray pipeline 12 are both provided with a heating device to keep the raw material at a constant temperature.

[0046] In the description of the present utility model, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spraying machine, characterized in that: It includes two material tanks, one of which is a black material tank for holding black material, and the other is a white material tank for holding white material. The material tank is a double-layer structure, and the interlayer of the material tank contains constant temperature oil. The top of the material tank is installed with an electronic pressure sensor, a mechanical pressure gauge and a safety valve, and the bottom of the material tank is installed with a feed pipe and a discharge pipe; A diaphragm pump is installed at one end of the feed pipe close to the material tank, a plate heat exchanger, a metering pump and a flow meter are installed at one end of the discharge pipe away from the material tank, a hydraulic plate type reversing valve is installed at one end of the hydraulic plate type reversing valve, a gun head is installed at one end of the hydraulic plate type reversing valve, and the other end of the hydraulic plate type reversing valve is connected to the material tank through a pipeline.

2. A spraying machine according to claim 1, characterized in that: One end of the feed pipe away from the material tank is connected with a raw material barrel.

3. A spraying machine according to claim 1, characterized in that: A stirring mechanism is installed on the top of the material tank, and the stirring mechanism includes a motor and a stirring paddle. The stirring paddle is located inside the material tank, and the output shaft of the motor is drivingly connected to the end of the stirring paddle.

4. A spraying machine according to claim 1, characterized in that: The material tank includes an inner tank and an outer tank, the outer tank is arranged on the outside of the inner tank, the interlayer between the outer tank and the inner tank contains constant temperature oil, the constant temperature oil controls the heating temperature through the heating temperature control system, and a heat preservation layer is arranged on the outside of the outer tank.

5. A spraying machine according to claim 1, characterized in that: The discharge pipe is equipped with a self-cleaning filter and an oil filter. The self-cleaning filter is located at one end of the discharge pipe close to the material tank, and the oil filter is located at one end of the discharge pipe away from the material tank.

6. A spraying machine according to claim 1, characterized in that: One end of the discharge pipe away from the material tank is connected to a spray pipeline, and the end of the spray pipeline is installed with the hydraulic plate type reversing valve. The hydraulic plate type reversing valve and the gun head are respectively connected to the hydraulic station through pipelines.

7. A spraying machine according to claim 1, characterized in that: The metering pump and the flow meter are both connected via a PLC control system.

8. A spraying machine according to claim 6, characterized in that: The outsides of the discharge pipe and the spray pipeline are both wrapped with heating belts.

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