Spraying machine with double plungers

Abstract

The utility model discloses a spraying machine with double plungers, which comprises a base, a liquid storage container and a plunger pump, the plunger pump comprises a pump seat, plungers, a crank, an eccentric wheel and a motor, a first plunger cavity and a second plunger cavity are arranged in parallel in the pump seat, the plungers comprise a first plunger and a second plunger, and the first plunger and the second plunger are arranged in parallel. The first plunger is installed in the first plunger cavity, the second plunger is installed in the second plunger cavity, the cranks comprise the first crank and the second crank, the first crank is connected with the first plunger, the second crank is connected with the second plunger, a first eccentric shaft is formed on the front face of the eccentric wheel, and a second eccentric shaft is formed on the rear face of the eccentric wheel. A first eccentric shaft is formed on the back face of the eccentric wheel, a second eccentric shaft is formed on the back face of the eccentric wheel, the first crank is connected with the first eccentric shaft, and the second crank is connected with the second eccentric shaft. The plunger pump is provided with a double-plunger structure, so that the pressure stability is improved, and the coating sprayed by the plunger pump is more uniform.

Description

Technical Field

[0001] The utility model relates to a spraying device, in particular to a spraying machine with double plungers. Background Art

[0002] The sprayer in the prior art, such as the utility model patent No. ZL202122704608.0 in China, published on April 5, 2022, discloses a backpack airless sprayer, including a base, a liquid storage container and a plunger pump assembly. The base is arranged below the liquid storage container and is provided with a shoulder strap. The plunger pump assembly is arranged on the base. The plunger pump assembly includes a pump body, a motor, an eccentric wheel, a connecting rod assembly, a plunger rod, a liquid inlet check valve, a liquid outlet check valve and an outlet pressure protection mechanism. The pump body is provided with a plunger cavity, a liquid inlet channel and a liquid outlet channel, and the liquid inlet channel and the liquid outlet channel are respectively connected to the plunger cavity. The output shaft gear of the motor meshes with the teeth of the eccentric wheel, the eccentric wheel is connected to one end of the plunger rod through the connecting rod assembly, and the other end of the plunger rod extends into the plunger cavity; the motor is arranged directly above the connecting rod assembly, and the output shaft gear of the motor is located between the eccentric wheel and the other end of the connecting rod assembly; the outlet pressure protection mechanism is arranged above the liquid outlet channel and is connected to the liquid outlet channel. In the above scheme, a single plunger structure is adopted, and the pressure applied to the liquid is unstable, which easily causes unstable liquid storage and affects the spraying effect. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a spraying machine with double plungers which has stable pressure and good spraying effect.

[0004] A spraying machine with double plungers provided by the utility model comprises a base, a liquid storage container installed on the base and a plunger pump installed in the base, the plunger pump comprises a pump seat, a plunger installed in the pump seat, a crank hinged to the plunger, an eccentric wheel connected to the crank and a motor driving the eccentric wheel, a first plunger cavity and a second plunger cavity are arranged in parallel in the pump seat, the plunger comprises a first plunger and a second plunger, the first plunger is installed in the first plunger cavity, the second plunger is installed in the second plunger cavity, the crank comprises a first crank and a second crank, the first crank is connected to the first plunger, the second crank is connected to the second plunger, a first eccentric shaft is formed on the front side of the eccentric wheel, a second eccentric shaft is formed on the reverse side of the eccentric wheel, the first crank is connected to the first eccentric shaft, and the second crank is connected to the second eccentric shaft.

[0005] A spraying machine with double plungers provided by the utility model also has the following auxiliary technical features:

[0006] Further including that the diameter of the first plunger is greater than the diameter of the second plunger.

[0007] It further includes that the eccentric wheel includes a driving flywheel and an eccentric crankshaft connected to the driving flywheel, and the first eccentric shaft and the second eccentric shaft are respectively arranged on both sides of the eccentric crankshaft.

[0008] It further includes that the output shaft of the motor is connected to a driving gear, and the driving gear is meshed with the driving flywheel.

[0009] It further includes that the first plunger and the second plunger are respectively provided with a bidirectional sealing structure.

[0010] It further includes that bearings are installed at both ends of the eccentric crankshaft and are connected to the pump seat.

[0011] It further includes that the first plunger and the second plunger are arranged side by side in the horizontal direction, the eccentric wheel is arranged in the vertical direction, the motor is placed horizontally, and the motor output shaft is located above the eccentric wheel.

[0012] Compared with the prior art, the spraying machine with double plungers provided by the utility model has the following advantages: the utility model is provided with a double plunger structure, which increases the stability of the pressure, making the paint sprayed by the plunger pump more uniform. At the same time, it is conducive to the pressure control of the plunger pump cavity, and can provide paint with higher pressure, thereby improving the spraying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the front view of the utility model.

[0014] Figure 2 This is a front view of the utility model with part of the base removed.

[0015] Figure 3 It is a bottom view of the plunger pump in the utility model.

[0016] Figure 4 It is a stereoscopic diagram of the plunger pump in the utility model.

[0017] Figure 5 It is the front view of the plunger pump in the utility model.

[0018] Figure 6 It is a cross-sectional view of the plunger pump in the utility model.

[0019] Figure 7 It is a front view of the plunger, crank and crankshaft in the utility model.

[0020] Figure 8 It is the front view of the plunger in the utility model. DETAILED DESCRIPTION

[0021] In order to clearly illustrate the scheme in the utility model, preferred embodiments are given below and described in detail with reference to the accompanying drawings. The following description is essentially only exemplary and is not intended to limit the application or use of the present disclosure. It should be understood that in all the drawings, corresponding reference numerals represent the same or corresponding parts and features.

[0022] like Figures 1 to 8 As shown, the utility model provides a spraying machine with double plungers, including a base 1, a liquid storage container 2 installed on the base 1 and a plunger pump 3 installed in the base 1, the plunger pump 3 includes a pump seat 31, a plunger 32 installed in the pump seat 31, a crank 33 hinged to the plunger 32, an eccentric wheel 34 connected to the crank 33 and a motor 35 driving the eccentric wheel 34, a first plunger cavity 311 and a second plunger cavity 312 are arranged in parallel in the pump seat 31, the plunger 32 includes a first plunger 321 and a second plunger 322, the first plunger 32 1 is installed in the first plunger cavity 311, and the second plunger 322 is installed in the second plunger cavity 312. The crank 33 includes a first crank 331 and a second crank 332. The first crank 331 is connected to the first plunger 321, and the second crank 332 is connected to the second plunger 322. The front of the eccentric wheel 34 is formed with a first eccentric shaft 341, and the back of the eccentric wheel 34 is formed with a second eccentric shaft 342. The first crank 331 is connected to the first eccentric shaft 341, and the second crank 332 is connected to the second eccentric shaft 342. The utility model drives two sets of the plungers 32 by one eccentric wheel 34, which not only makes the eccentric wheel 34 run more smoothly, but also makes the pressure output by the plunger 32 more stable. The utility model is provided with a double plunger structure, and the pressure output is more stable than that of the single plunger structure. At the same time, the pressure output by the plunger pump is increased to improve the spraying effect. The use of a double-plunger structure can reduce the wear of the single plunger on the plunger cavity and also ease the working condition of the plunger pump under high pressure.

[0023] See also Figures 1 to 8 In the above embodiment of the utility model, the diameter of the first plunger 321 is further included to be larger than the diameter of the second plunger 322. The utility model adopts a large and a small two plunger structure, which can be better adjusted according to the output pressure, so that the plunger pump runs more smoothly and increases the output pressure.

[0024] See also Figures 1 to 8In the above embodiment of the utility model, the eccentric wheel 34 further includes a driving flywheel 343 and an eccentric crankshaft 344 connected to the driving flywheel 343, and the first eccentric shaft 341 and the second eccentric shaft 342 are respectively arranged on both sides of the eccentric crankshaft 344. The structure in which the eccentric crankshaft 344 and the driving flywheel 343 cooperate is adopted, which is conducive to processing, so that the driving flywheel 343 runs more smoothly and improves work efficiency.

[0025] See also Figures 1 to 8 In the above embodiment of the utility model, the output shaft of the motor 35 is further connected with a driving gear 351, and the driving gear 351 is meshed with the driving flywheel 343. In this embodiment, the driving gear 351 is directly formed on the output shaft of the motor 35, so that the motor 35 directly drives the driving flywheel 343, reducing the intermediate transmission structure, and reducing the volume and weight of the plunger pump.

[0026] See also Figures 1 to 8 In the above embodiment of the present invention, the first plunger 321 and the second plunger 322 are respectively provided with a bidirectional sealing structure 323. The plunger 32 in the present invention adopts a bidirectional sealing structure to improve the sealing effect and make the output pressure more stable.

[0027] See also Figures 1 to 8 In the above embodiment of the utility model, bearings 345 are installed at both ends of the eccentric crankshaft 344 and connected to the pump seat 31. The eccentric crankshaft 344 is installed more firmly and runs more smoothly.

[0028] See also Figures 1 to 8 In the above embodiment of the utility model, the first plunger 321 and the second plunger 322 are arranged side by side in the horizontal direction, the eccentric wheel 34 is arranged in the vertical direction, the motor 35 is placed horizontally, and the motor output shaft is located above the eccentric wheel 34. The above structure makes the plunger pump structure more compact and can reduce the volume and weight.

[0029] In summary, the above contents are only embodiments of the present invention, which are only used to illustrate the principle of the present invention, and are not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sprayer with double plungers, comprising a base, a liquid storage container mounted on the base and a plunger pump mounted in the base, the plunger pump comprising a pump base, a plunger mounted in the pump base, a crank hinged to the plunger, an eccentric wheel connected to the crank and a motor driving the eccentric wheel, characterized in that: A first plunger cavity and a second plunger cavity are arranged in parallel in the pump seat, the plunger includes a first plunger and a second plunger, the first plunger is installed in the first plunger cavity, and the second plunger is installed in the second plunger cavity, the crank includes a first crank and a second crank, the first crank is connected to the first plunger, and the second crank is connected to the second plunger, a first eccentric shaft is formed on the front side of the eccentric wheel, and a second eccentric shaft is formed on the back side of the eccentric wheel, the first crank is connected to the first eccentric shaft, and the second crank is connected to the second eccentric shaft.

2. A spraying machine with a double plunger as claimed in claim 1, characterized in that: The diameter of the first plunger is greater than the diameter of the second plunger.

3. A spraying machine with double plungers as claimed in claim 1, characterized in that: The eccentric wheel includes a driving flywheel and an eccentric crankshaft connected to the driving flywheel, and the first eccentric shaft and the second eccentric shaft are respectively arranged on both sides of the eccentric crankshaft.

4. A spraying machine with double plungers as claimed in claim 3, characterized in that: The output shaft of the motor is connected with a driving gear, and the driving gear is meshed with the driving flywheel.

5. A spraying machine with double plungers as claimed in claim 1, characterized in that: The first plunger and the second plunger are respectively provided with a bidirectional sealing structure.

6. A spraying machine with double plungers as claimed in claim 3, characterized in that: Bearings are installed at both ends of the eccentric crankshaft and are connected to the pump seat.

7. A spraying machine with double plungers as claimed in claim 1, characterized in that: The first plunger and the second plunger are arranged side by side in the horizontal direction, the eccentric wheel is arranged in the vertical direction, the motor is placed horizontally, and the motor output shaft is located above the eccentric wheel.

Images