Spraying machine

Abstract

The utility model provides a spraying machine, and belongs to the technical field of spraying machines. The portable spraying machine with the double liquid outlets is stable in output water pressure and optimized and reasonable in structure. The spraying machine comprises a mounting frame, a driving device and a plunger pump, the driving device and the plunger pump are fixedly connected to the mounting frame, the spraying machine further comprises a left liquid inlet chamber, a right liquid inlet chamber, a left liquid outlet chamber, a right liquid outlet chamber, a pressure regulating valve and an air chamber, and the positions and the structures of the components are further optimally designed. On the basis of the prior art, the liquid outlet is added to improve the working efficiency of the spraying machine, the positions and the structures of all the components are further optimized and designed on the basis, a waterway system is more stable and firmer, the overall structure is more compact and reasonable, and the space utilization rate is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of sprayers, and particularly refers to a small sprayer with two liquid outlets. Background Art

[0002] A sprayer is a machine driven by a power source (such as an engine, a motor, etc.), which disperses a liquid into a mist through a pump body and sprays it out. According to the working principle, it can be divided into hydraulic, pneumatic and centrifugal sprayers, and is widely used in agriculture, industry and other fields. The appearance of the sprayer has changed the situation that the traditional spraying work is mainly carried out by manually carrying a hand-held sprayer, greatly reducing the labor intensity of the spraying work and improving the spraying efficiency.

[0003] The Chinese invention patent with the publication number of "201110061947X" discloses a connecting device for the inlet and outlet water pipes of a plunger pump of a sprayer, including the pump body of the plunger pump. Cylinder chambers are provided at both ends of the pump body. A drainage chamber is provided at the upper end of each cylinder chamber, and a water inlet chamber is provided at the lower end. The two water inlet chambers and the two drainage chambers are connected by stainless steel high-pressure water pipes. An outlet joint is installed in one of the drainage chambers, and a pressure regulating valve is connected to the other drainage chamber. The centers of the drainage chamber and the water inlet chamber are on the same straight line, shortening the overall length and reducing the weight of the whole machine. However, the above-mentioned connecting device for the inlet and outlet water pipes of the plunger pump of the sprayer only has one water outlet, which cannot support multiple people to operate simultaneously. The equipment utilization rate and working efficiency need to be further improved. If only one more water outlet is simply added on the original basis, due to the asynchronous use of the two people, a large amount of hydraulic shock and pressure waves will be generated additionally when the plunger pump is working. These pressure waves will cause sudden increases and decreases in the pressure in the pipeline and the water pump system, uneven water pressure at the left and right liquid outlets, intermittent water output and other problems, affecting the normal operation of the water pump and even causing damage to the pipeline and valves, etc. At the same time, the existing structure is not completely suitable for the requirements of two water outlets, and the structure needs to be further optimized. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a portable sprayer with two liquid outlets, which has stable output water pressure and reasonable structural optimization.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] A sprayer, comprising a mounting frame, a driving device fixedly connected to the mounting frame, and a plunger pump. The driving device is rotationally connected to the plunger pump. It further includes a left liquid inlet chamber, a right liquid inlet chamber, a left liquid outlet chamber, a right liquid outlet chamber, a pressure regulating valve, and an air chamber. The left and right ends of the plunger pump are symmetrically connected to left and right pump chambers respectively. The plunger of the plunger pump reciprocates axially in the left and right pump chambers. The left and right liquid inlet chambers are cylindrical and are vertically arranged outside the left and right pump chambers. The left and right liquid inlet chambers are connected through a horizontally installed liquid inlet connecting pipe. The left and right liquid outlet chambers are tubular and are vertically arranged above the left and right pump chambers. The left end of the left liquid outlet chamber is provided with a left liquid outlet, and the right end of the right liquid outlet chamber is provided with a right liquid outlet. The left and right liquid outlet chambers are connected through a horizontally installed liquid outlet connecting pipe. The air chamber is in the shape of a tank and is vertically arranged at the upper end of the left liquid outlet chamber and is fixedly connected to the upper end of the left liquid outlet chamber. The pressure regulating valve is vertically arranged and fixedly connected to the upper end of the right liquid outlet chamber.

[0007] This sprayer is provided with two liquid outlet cavities, and through the horizontally arranged liquid inlet connecting pipe and liquid outlet connecting pipe, the entire water circuit system is connected into a whole and filled with high-pressure liquid, and high-pressure liquid can be sprayed out from both the left and right liquid outlet chambers, increasing the liquid outlet to improve the working efficiency of the spraying operation on a single sprayer. However, in actual use, due to the asynchronous use by two people, a large amount of additional hydraulic shock and pressure waves will be generated when the water pump works. These pressure waves will cause problems such as sudden increase and decrease of pressure in the pipeline and water pump system, uneven water pressure at the left and right liquid outlets, and intermittent water discharge, affecting the normal operation of the water pump and even causing damage to pipelines and valves. To solve the above technical problems, this solution reduces pressure waves and water hammer phenomena by setting an air chamber in the water circuit system, playing a role in stabilizing pressure and reducing vibration and noise generated during the operation of the water pump. At the same time, a pressure regulating valve is set to adjust the pressure in the pipeline, playing a protective role and further regulating the water pressure stability of the pipeline system, and also protecting the water pump and pipeline system and extending the service life.

[0008] The sprayer in this solution is a small portable sprayer. When an additional liquid outlet is added, the requirements for the spatial structure design are further improved. Since the tank-shaped air chamber and pressure regulating valve are relatively large in volume, in this solution, the air chamber and pressure regulating valve are respectively arranged at the upper ends of the left and right liquid outlet chambers, so as to leave space below for reasonable arrangement of the pipeline system; the left and right liquid inlet chambers vertically arranged in a column shape on the outer sides of the left and right pump chambers are connected to the pump chambers at the upper parts and are connected through liquid inlet connecting pipes at the lower parts. The left and right liquid outlet chambers vertically arranged in a tubular shape above the left and right pump chambers are connected through liquid outlet connecting pipes. The plunger pump, the left and right pump chambers, the left and right liquid outlet chambers, and the left and right liquid inlet chambers are connected to form a compact waterway system with internal liquid circulation; the left and right liquid outlets are arranged at the left and right ends, and the liquid outlet positions are directly opposite to the spraying targets in the left and right directions, facilitating the installation and use of various types of nozzles, spray guns, etc. Through full consideration of the position structures and overall layouts of each component, the above-mentioned components are organically combined and cooperate with each other to optimize the overall structure, making the whole present a relatively symmetrical state, making the component arrangement more compact and reasonable within the limited space, and improving the space utilization rate. This structural layout has not appeared in the prior art and is a new design adopted by this solution to solve the technical problem of "how to make the output water pressure of the portable sprayer stable, the structure optimized and reasonable, and have double liquid outlets".

[0009] Further, the left and right pump chambers include an integrally formed liquid chamber and pump chamber. The pump chambers of the left and right pump chambers are fixedly connected to the plunger pump. Pump chamber liquid inlets are provided at the left ends of the liquid chambers of the left pump chamber and the right ends of the liquid chambers of the right pump chamber. Pump chamber liquid outlets are provided at the upper parts of the liquid chambers of the left and right pump chambers. Check valves are provided at both the pump chamber liquid inlets and the pump chamber liquid outlets; corresponding liquid inlet chamber outlets are provided at the upper sides of the left and right liquid inlet chambers and are opposite to the pump chamber liquid inlets. The centers of the liquid inlet chamber outlets, the left and right pump chambers, and the plunger pump are on the same horizontal line. Mounting connection ears corresponding to each other in position are provided at both the left and right ends of the left and right pump chambers and at the positions of the liquid inlet chamber outlets of the left and right liquid inlet chambers. The left and right pump chambers and the left and right liquid inlet chambers are fixed on the plunger pump through bolts; liquid inlet chamber inlets are provided at the lower ends of the left and right liquid outlet chambers and are connected to the pump chamber liquid outlets of the left and right pump chambers through the liquid inlet chamber inlets. Connection ears corresponding to each other in position are provided at the liquid outlets of the left and right pump chambers and on the left and right liquid outlet chambers.

[0010] The outlet of the liquid inlet chamber, the pump chamber, and the plunger pump of this solution are on the same horizontal line. Connecting ears are integrally formed on the outlet of the liquid inlet chamber, the left and right pump chambers, and the plunger pump. Threaded holes are provided on the connecting ears, and the positions of the connecting ears of the three correspond to each other. The liquid inlet chamber, the pump chamber, and the plunger pump can be horizontally fixed together by the same bolt. The moving direction of the plunger is consistent with the direction of the overall connection. The overall structure is more compact and stable, and can better withstand the impact of high-pressure liquid, reducing the adverse effects on the pipeline system during the operation of the plunger pump; the space occupied by setting connecting ears on each component is small, making the overall installation structure more concise. At the same time, each component is firmly installed by bolt connection, and the disassembly and assembly are very simple, facilitating the maintenance and repair during later use.

[0011] Further, the right liquid outlet is connected to one end of a three-way pipe, and the other two ends of the three-way pipe are respectively connected to a pressure gauge and a switching valve. A pressure gauge is set to more intuitively observe the water pressure inside the pipeline system.

[0012] Further, the diameter of the plunger of the plunger pump is 22 mm.

[0013] In a small sprayer, the common diameter of the plunger of the plunger pump is 18 mm. When there is only one liquid outlet, the 18-mm plunger is sufficient to adapt to the work. However, when an additional liquid outlet is added, the liquid flow driven by the original 18-mm plunger is not enough to fully support the use of the double liquid outlets. Therefore, the diameter of the plunger is increased to 22 mm to increase the liquid flow driven by the plunger pump, fully meeting the use requirements of the double liquid outlets.

[0014] In the sprayer of this solution, the air chamber is a stainless steel tank. The air chamber made of stainless steel is light in weight and high in strength, and can better meet the working requirements of the portable sprayer.

[0015] In the sprayer of this solution, grease chambers are respectively provided on the left pump chamber and the right pump chamber.

[0016] In the sprayer of this solution, a liquid inlet interface is provided on the left liquid inlet chamber and / or the right liquid inlet chamber.

[0017] Compared with the prior art, the technical effects of this utility model are as follows:

[0018] The entire water pipeline system of the sprayer provided by this utility model is connected and filled with high-pressure liquid. High-pressure liquid can be ejected from both the left liquid outlet and the right liquid outlet. An additional liquid outlet is added to a single sprayer to improve the working efficiency of the spraying operation. Moreover, under this structural setting, the reciprocating movement of the plunger left and right is effectively doing work on the liquid, thereby improving the utilization rate of the equipment. And a switching valve is provided at the right liquid outlet, which can meet the different requirements of single outlet and double outlets. On this basis, the diameter of the plunger of the common plunger pump is increased to 22 mm to increase the liquid flow driven by the plunger pump, fully meeting the use requirements of the double liquid outlets;

[0019] By reasonably arranging the positions of components such as the plunger pump, left and right pump chambers, left and right liquid outlet chambers, left and right liquid inlet chambers, air chamber, and pressure regulating valve, the above-mentioned multiple components are organically combined and coordinated to optimize the overall structure, presenting a relatively symmetrical state. In a limited space, the components are arranged more compactly and reasonably, increasing the space utilization rate;

[0020] The sprayer provided by the present utility model is provided with an air chamber at the upper end of the left liquid outlet chamber. Through the coordinated setting and cooperation of the air chamber and the right liquid outlet chamber, while adding a liquid outlet on the right side of this solution, the pressure wave and water hammer phenomenon in the pipeline system are reduced, so that the water pressure in the water pipeline system is more stable. At the same time, it can also protect the water pump and pipeline system, extend the service life, reduce the vibration and noise generated during the operation of the water pump. At the same time, the liquid outlet, pump chamber, and plunger pump are on the same horizontal line as a whole, and the liquid inlet chamber, pump chamber, and plunger pump are horizontally fixed together by the same long bolt. The movement direction of the plunger is consistent with the direction of the overall connection, and the overall structure is more compact and stable, reducing the adverse impact on the pipeline system during the operation of the plunger pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure provided by the present utility model.

[0022] Figure 2 is a schematic diagram of the plunger pump structure provided by the present utility model.

[0023] Figure 3 is an exploded view of a part of the plunger pump provided by the present utility model.

[0024] Figure 4 is a partial cross-sectional view of the plunger pump provided by the present utility model.

[0025] Figure 5 is a schematic diagram of the structures of the left liquid outlet chamber and the right liquid outlet chamber provided by the present utility model.

[0026] Figure 6 is a schematic diagram of the structures of the left pump chamber and the right pump chamber provided by the present utility model.

[0027] Figure 7 is a schematic diagram of the structures of the left liquid inlet chamber and the right liquid inlet chamber provided by the present utility model.

[0028] Figure 8 is a schematic diagram of the three-way connection structure provided by the present utility model.

[0029] In the figure, 1 is the mounting bracket, 2 is the driving device, 3 is the plunger pump, 31a is the left pump chamber, 31b is the right pump chamber, 311 is the liquid chamber, 312 is the pump chamber, 313 is the liquid inlet of the pump chamber, 314 is the liquid outlet of the pump chamber, 32a is the left liquid inlet chamber, 32b is the right liquid inlet chamber, 321 is the outlet of the liquid inlet chamber, 33 is the liquid inlet interface, 34a is the left liquid outlet chamber, 34b is the right liquid outlet chamber, 341 is the inlet of the liquid outlet chamber, 35 is the liquid inlet connecting pipe, 36 is the liquid outlet connecting pipe, 37a is the left liquid outlet, 37b is the right liquid outlet, 39 is the connecting ear, 4 is the pressure regulating valve, 5 is the three-way pipe, 6 is the pressure gauge, 7 is the on-off valve, 8 is the air chamber, and 9 is the grease chamber. Detailed implementation mode

[0030] The following are specific embodiments of the present invention and, in combination with the accompanying drawings, further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0031] As Figure 1 shown, a sprayer includes a mounting bracket 1, a driving device 2 fixedly connected to the mounting bracket 1, and a plunger pump 3. The mounting bracket 1 is spliced by steel pipes, with a simple overall structure, reducing the weight of the whole machine and facilitating hand-held handling.

[0032] Furthermore, as Figure 2 , Figure 3 , Figure 4 , Figure 5 shown, the left and right ends of the plunger pump 3 are symmetrically connected with a left pump chamber 31a and a right pump chamber 31b respectively. The plunger of the plunger pump 3 reciprocates axially in the left and right pump chambers 31a and 31b. The left and right pump chambers 31a and 31b include an integrally formed liquid chamber 311 and a pump chamber 312. The pump chamber 312 is connected to the plunger pump 3. The liquid chamber 311 is provided with a liquid inlet 313 of the pump chamber at one end, and a liquid outlet 314 of the pump chamber is provided at the upper part of the liquid chamber 311. Check valves 38 are provided at both the liquid inlet 313 and the liquid outlet 314 of the pump chamber. The left and right pump chambers 31a and 31b are respectively connected with a left liquid inlet chamber 32a and a right liquid inlet chamber 32b at the left and right ends through the liquid inlet 313 of the pump chamber. The left and right liquid inlet chambers 32a and 32b are cylindrical, and an outlet 321 of the liquid inlet chamber corresponding to the liquid outlet 314 of the pump chamber is provided at the upper part of the side surface. The centers of the outlet 321 of the liquid inlet chamber, the left and right pump chambers 31a and 31b, and the plunger pump 3 are on the same horizontal line. The liquid inlet chamber, the pump chamber, and the plunger pump are horizontally fixedly connected into one body by the same bolt 9. The left and right liquid inlet chambers 32a and 32b are connected through a liquid inlet connecting pipe 35. A liquid inlet interface 33 is provided at the lower part of the left liquid inlet chamber 32a, and a water source is connected through a water pipe or the like.

[0033] Further, the left and right pump chambers 31a and 31b are respectively connected to a left liquid outlet chamber 34a and a right liquid outlet chamber 34b above the liquid chamber 311 through pump chamber liquid outlet ports 314. The left and right liquid outlet chambers 34a and 34b are connected through a liquid outlet connecting pipe 36. A left liquid outlet port 37a is provided at the left end of the left liquid outlet chamber 34a, and a right liquid outlet port 37b is provided at the right end of the right liquid outlet chamber 34b. An air chamber 8 is connected to the upper end of the left liquid outlet chamber 34a, and the air chamber 8 is threadedly connected to the left liquid outlet chamber 34a. A pressure regulating valve 4 is connected to the upper end of the right liquid outlet chamber 34b. Grease chambers are respectively provided on the left pump chamber 31a and the right pump chamber 31b. The overall solution tends to a symmetric state, with a more compact and optimized overall layout, and the positions and installation methods of each component are set more reasonably within a limited space, minimizing the occupied space as much as possible.

[0034] Further, as Figure 5 , Figure 6 , Figure 7 shown, connection lugs 39 with one-to-one corresponding positions are provided at the left and right ends of the left and right pump chambers 31a and 31b and at the positions of the liquid inlet chamber outlet ports 321 of the left and right liquid inlet chambers 32a and 32b. Connection lugs 39 with corresponding positions are provided at the position of the pump chamber liquid outlet port 314 of the left pump chamber 31a and at the lower end of the left liquid outlet chamber 34a, and at the position of the pump chamber liquid outlet port 314 of the right pump chamber 31b, at the upper end of the right liquid outlet chamber 34b, and at the lower end of the safety valve 4. Threaded holes are provided on the connection lugs, and multiple components are fixedly connected into one body through a bolt respectively, simplifying the installation structure.

[0035] Further, as Figure 2 , Figure 8 shown, the right liquid outlet port 37b is connected to one end of a three-way pipe 5, and the other two ends of the three-way pipe 5 are respectively connected to a pressure gauge 6 and a switching valve 7. The pressure gauge 6 is provided to more intuitively observe the water pressure inside the pipeline system.

[0036] Further, the plunger diameter of the plunger pump 3 is 22 mm. In a small sprayer, the common plunger diameter of the plunger pump 3 is 18 mm. When there is only one liquid outlet, a 18-mm plunger is sufficient to adapt to the work. However, when an additional liquid outlet is added, the liquid flow rate driven by the original 18-mm plunger is not enough to fully support the use of the double liquid outlets. Therefore, the plunger diameter is increased to 22 mm to increase the liquid flow rate driven by the plunger pump, fully meeting the use of the double liquid outlets.

[0037] The working principle of the present utility model is as follows:

[0038] Connect the liquid inlet interface 33 of this sprayer to a water source through a water pipe. Turn on the driving device 2. The driving device 2 drives the plunger pump 3 to make the plunger of the plunger pump 3 reciprocate in the left pump chamber 31a and the right pump chamber 31b. When the plunger moves to the right, the pressure in the left pump chamber 31a decreases, driving the one-way valve 38 at the liquid inlet of the left pump chamber 31a to open and closing the one-way valve at the liquid outlet of the left pump chamber 31a. The liquid is sucked into the left pump chamber 31a from the liquid inlet interface 33 through the left liquid inlet chamber 32a. Then the plunger moves to the left, closing the one-way valve 38 at the liquid inlet of the left pump chamber 31a and opening the one-way valve 38 at the liquid outlet of the left pump chamber 31a. The liquid in the left pump chamber 31a enters the left liquid outlet chamber 34a. At the same time, the pressure in the right pump chamber 31b decreases, driving the one-way valve 38 at the liquid inlet of the right pump chamber 31b to open and closing the one-way valve 38 at the liquid outlet of the right pump chamber 31b. The liquid is sucked into the right pump chamber 31b from the liquid inlet interface 33 through the liquid inlet connecting pipe 35 and the right liquid inlet chamber 32b. Then the plunger moves to the right, pressing the liquid in the right pump chamber 31b into the right liquid outlet chamber 34b and through the liquid outlet connecting pipe 36 into the left liquid outlet chamber 34a by connection. In this way, the cycle repeats, the entire water circuit system is connected and filled with high-pressure liquid, and high-pressure liquid can be sprayed out from both the left liquid outlet 37a and the right liquid outlet 37b.

[0039] The above embodiments are only the preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope defined by the claims of the present invention.

Claims

1. A sprayer, comprising a mounting frame (1), a driving device (2) fixedly connected to the mounting frame (1), and a plunger pump (3), wherein the driving device (2) and the plunger pump (3) are rotatably connected, characterized in that: The invention also comprises a left liquid inlet chamber (32a), a right liquid inlet chamber (32b), a left liquid outlet chamber (34a), a right liquid outlet chamber (34b), a pressure regulating valve (4) and an air chamber (8); the left and right ends of the plunger pump (3) are symmetrically connected to a left pump chamber (31a) and a right pump chamber (31b), respectively, and the plunger of the plunger pump (3) reciprocates along the axial direction of the left pump chamber (31a) and the right pump chamber (31b); the left liquid inlet chamber (32a) and the right liquid inlet chamber (32b) are columnar and vertically arranged on the outside of the left pump chamber (31a) and the right pump chamber (31b), and the left liquid inlet chamber (32a) and the right liquid inlet chamber (32b) are connected via a horizontally installed liquid inlet. The left and right liquid outlet chambers (34a and 34b) are connected by a pipe (35); the left liquid outlet chamber (34a) and the right liquid outlet chamber (34b) are vertically arranged above the left pump chamber (31a) and the right pump chamber (31b) in a tubular shape; the left end of the left liquid outlet chamber (34a) is provided with a left liquid outlet (37a); the right end of the right liquid outlet chamber (34b) is provided with a right liquid outlet (37b); the left liquid outlet chamber (34a) and the right liquid outlet chamber (34b) are connected by a horizontally installed liquid outlet connecting pipe (36); the air chamber (8) is in a tank shape, vertically arranged at the upper end of the left liquid outlet chamber (34a), and the lower end is fixedly connected to the upper end of the left liquid outlet chamber (34a); the pressure regulating valve (4) is vertically arranged and fixedly connected to the upper end of the right liquid outlet chamber (34b).

2. A spray machine according to claim 1, characterized in that: The left pump chamber (31a) and the right pump chamber (31b) comprise an integrally formed liquid chamber (311) and a pump chamber (312); the pump chambers (312) of the left pump chamber (31a) and the right pump chamber (31b) are fixedly connected to the plunger pump (3); a pump chamber liquid inlet (313) is provided at the left end of the liquid chamber (311) of the left pump chamber (31a) and the right end of the liquid chamber (311) of the right pump chamber (31b); a pump chamber liquid outlet (314) is provided at the upper part of the liquid chamber (311) of the left pump chamber (31a) and the right pump chamber (31b); and a one-way valve (38) is provided at the pump chamber liquid inlet (313) and the pump chamber liquid outlet (314); The upper sides of the left liquid inlet chamber (32a) and the right liquid inlet chamber (32b) are provided with liquid inlet chamber outlets (321) corresponding to the pump chamber liquid inlet (313); the liquid inlet chamber outlets (321), the left pump chamber (31a), the right pump chamber (31b) and the center of the plunger pump (3) are on the same horizontal line; the left and right ends of the left pump chamber (31a) and the right pump chamber (31b) and the liquid inlet chamber outlets (321) of the left liquid inlet chamber (32a) and the right liquid inlet chamber (32b) are provided with mounting connection ears (39) corresponding to each other in position; the left pump chamber (31a), the right pump chamber (31b), the left liquid inlet chamber (32a) and the right liquid inlet chamber (32b) are fixed to the plunger pump (3) by bolts; The lower ends of the left liquid outlet chamber (34a) and the right liquid outlet chamber (34b) are provided with liquid outlet chamber inlets (341), which are communicated with the pump chamber liquid outlets (314) of the left pump chamber (31a) and the right pump chamber (31b) through the liquid outlet chamber inlets (341). The liquid outlets (314) of the left pump chamber (31a) and the right pump chamber (31b) and the left liquid outlet chamber (34a) and the right liquid outlet chamber (34b) are provided with corresponding connection ears (39).

3. A spray machine according to claim 1, characterized in that: The right liquid outlet (37b) is connected to one end of a three-way pipe (5), and the other two ends of the three-way pipe (5) are respectively connected to a pressure gauge (6) and a switch valve (7).

4. A spray machine according to claim 1, characterized in that: The plunger diameter of the plunger pump (3) is 22 mm.

5. A spray machine according to claim 1, characterized in that: The air chamber (8) is a stainless steel tank.

6. A spray machine according to claim 1, characterized in that: The left pump chamber (31a) and the right pump chamber (31b) are respectively provided with a grease chamber (9).

7. A spray machine according to claim 1, characterized in that: The left liquid inlet chamber (32a) and / or the right liquid inlet chamber (32b) is provided with a liquid inlet interface (33).

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