A plunger-type paint sprayer

Abstract

This utility model discloses a plunger-type spraying machine, including a spraying machine body and a filter assembly installed on the spraying machine body. The filter assembly includes a filter tank with an open top and a plug screwed to the top of the filter tank. An inlet and an outlet are respectively opened on the side wall of the bottom and the side wall of the top of the filter tank. An inlet channel communicating with the inlet is opened in the bottom of the filter tank. The outlet end of the inlet channel faces the top of the filter tank. A cylindrical filter screen is installed in the filter tank. The outlet end of the inlet channel is located inside the filter screen. A rotating shaft with the top rotating with the plug is provided in the filter screen. A turbine fan is fixedly installed at the bottom of the rotating shaft. The blades of the turbine fan are located above the outlet end of the inlet channel. A connecting rod is provided on the rotating shaft, and a scraper is provided on the connecting rod. The advantage is that it can clean the inner wall of the filter screen, avoid the problem of the filter screen being blocked by paint particles, and ensure that the spraying machine can be used for a long time.

Description

Technical Field

[0001] This utility model relates to a spraying machine, and more particularly to a plunger-type spraying machine. Background Technology

[0002] The plunger sprayer is the core power source of a high-pressure, airless spraying equipment, widely used in industrial coating, construction, shipbuilding, anti-corrosion engineering and other fields. Its core is to use the reciprocating motion of the plunger (piston) to generate high pressure, push the paint, and spray it onto the surface of the object through the nozzle.

[0003] In existing technologies, such as the remote-controlled adjustable high-pressure airless sprayer with publication number CN205392806U, a plunger pump with a motor and transmission connection is included. The discharge end of the plunger pump is connected to the spray gun via a high-pressure hose. A motor controller is also connected to the motor, which has a built-in wireless signal receiving unit. A corresponding wireless signal transmitting unit is set in a remote control device. The remote control device also has a related main board, adjustment switch, display screen, and battery, forming a wireless remote control adjustment device for the plunger pump pressure. This structure is reasonable and compact, and the operator only needs to press the adjustment switch of the remote control device to adjust the motor operating parameters of the motor controller using wireless signals, thereby changing the spray output pressure of the plunger pump. It is very convenient and simple, eliminating the need to frequently return to the sprayer for adjustment, which can improve work efficiency, reduce paint waste, and improve the spraying effect. At the same time, in order to prevent the spray gun from clogging during operation, a filter is installed at the discharge end of the plunger pump.

[0004] However, it also has some shortcomings. For example, when the sprayer is used for a long time, the filter screen structure in its filter is easily clogged by particles in the paint. This will affect the filter's filtering effect on subsequent paint, and thus affect the spraying effect of the sprayer. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a plunger-type spraying machine that can work continuously for a long time.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a plunger-type spraying machine, including a spraying machine body, a filter assembly provided on the spraying machine body, the filter assembly including a filter tank, the filter tank being installed on the spraying machine body, the top of the filter tank being open, an inlet and an outlet being respectively provided on the side wall of the bottom and the side wall of the top of the filter tank, an inlet channel communicating with the inlet being provided in the bottom of the filter tank, the outlet end of the inlet channel facing the top of the filter tank; a plug, the plug being installed on the top of the filter tank, the plug being screwed to the filter tank; and a filter screen. The filter screen is cylindrical and installed in a filter tank. The outlet end of the liquid inlet channel is located inside the filter screen. The top of the filter screen is connected to the bottom of the plug, and the bottom of the filter screen is connected to the bottom of the filter tank. A rotating shaft is installed in the filter tank. The top of the rotating shaft is rotatably connected to the bottom of the plug. A turbine fan is fixedly installed at the bottom of the rotating shaft. The blades of the turbine fan are located above the outlet end of the liquid inlet channel. Multiple connecting rods are evenly and symmetrically arranged on the rotating shaft. Each connecting rod has a scraper at the end near the filter screen for scraping the inner wall of the filter screen.

[0007] A further preferred embodiment of this utility model is as follows: a first connecting ring is provided at the top of the filter screen, the first connecting ring is screwed to the bottom of the plug, a second connecting ring is provided at the bottom of the filter screen, a positioning groove matching the second connecting ring is opened at the bottom of the filter tank, the second connecting ring is inserted into the positioning groove, and multiple support strips are evenly arranged on the outer wall of the filter screen, the top and bottom of the support strips are respectively connected to the first connecting ring and the second connecting ring.

[0008] A further preferred embodiment of this utility model is as follows: a bearing is provided on the rotating shaft, the inner ring of the bearing is fixedly connected to the rotating shaft, and multiple support rods are provided circumferentially on the outer ring of the bearing, with a support ring abutting against the inner wall of the filter screen at the end of the support rod away from the bearing.

[0009] A further preferred embodiment of this utility model is: a pipe joint is screwed into the liquid inlet and the liquid outlet respectively, and a first sealing gasket is provided at the end of the pipe joint near the filter tank.

[0010] A further preferred embodiment of this utility model is: the filter can is also provided with a pressure sensor for detecting the internal pressure of the filter can, and the pressure sensor is provided with a second sealing gasket at one end near the filter can.

[0011] A further preferred embodiment of this utility model is: on the outer wall of the filter tank, on the side wall where the pipe joint and pressure sensor are located, there is a protrusion with a flat surface.

[0012] A further preferred embodiment of this utility model is that the drive device in the main body of the spraying machine is a brushless motor.

[0013] A further preferred embodiment of this utility model is that the bottom of the main body of the spraying machine is detachably provided with two support frames.

[0014] A further preferred embodiment of this utility model is that the filter tank is also provided with a reflux valve for pressure relief.

[0015] A further preferred embodiment of this utility model is: a third sealing gasket is provided at the bottom of the plug, the third sealing gasket abuts against the inside of the top opening of the filter tank, and a knob is provided at the top of the plug.

[0016] Compared with the prior art, the advantages of this utility model are that when the rotating shaft is rotating, the scraper can scrape the inner wall of the filter screen, thereby avoiding the problem of the filter screen being blocked by paint particles, while ensuring the filtration effect of the filter screen on the paint, thus ensuring the spraying effect of the spraying machine on the paint, and also ensuring that the spraying machine can be used for a long time. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a front view of the present invention;

[0019] Figure 2 This is a side view of the present invention;

[0020] Figure 3 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the main body of the spraying machine in this utility model without the support frame installed;

[0022] Figure 5 This is a front view of the filter assembly in this utility model;

[0023] Figure 6 This is a side view of the filter assembly in this utility model;

[0024] Figure 7 This is a three-dimensional structural diagram of the filter component in this utility model;

[0025] Figure 8 This is a schematic diagram of the internal structure of the filter assembly in this utility model;

[0026] Figure 9 for Figure 8 Enlarged view of part A in the middle;

[0027] Figure 10 This is a three-dimensional structural diagram of the filter screen in this utility model.

[0028] In the diagram: 1. Main body of the spraying machine; 101. Drive unit; 102. Control components; 103. Transmission mechanism; 104. Pump body; 2. Filter assembly; 21. Filter tank; 211. Protrusion; 212. Positioning groove; 213. Liquid inlet channel; 22. Knob; 221. Plug; 222. Third sealing gasket; 23. Pipe joint; 231. First sealing gasket; 24. Pressure sensor; 241. Second sealing gasket; 25. Return valve; 26. Filter screen; 261. First connecting ring; 262. Second connecting ring; 263. Support bar; 27. Rotating shaft; 271. Connecting rod; 272. Scraper; 273. Support ring; 274. Support rod; 275. Bearing; 28. Turbine fan; 3. Support frame; 4. Suction pipe; 5. Power cord; 6. Infusion pipe. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0030] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0031] This embodiment mainly describes the structure of a plunger-type spraying machine, as follows:

[0032] like Figures 1-10 As shown, a plunger-type spraying machine includes a spraying machine body 1 consisting of a drive device 101, a transmission mechanism 103, a pump body 104, and a control component 102, and a filter component 2 installed on the spraying machine body 1. The transmission mechanism 103 is installed at the output end of the drive device 101, the pump body 104 is installed at the output end of the transmission mechanism 103, and the control component 102 is installed on the drive device 101. A power cord 5 for connecting to a power source is provided on the control component 102.

[0033] When the spraying machine is working, the control component 102 controls the drive unit 101 to start, and the output end of the drive unit 101 drives the transmission mechanism 103 to work. As the transmission mechanism 103 works, the pump body 104 installed on the output end of the transmission mechanism 103 also works. The transmission mechanism 103 is used to convert the rotational motion of the output end of the drive unit 101 into a high-speed linear reciprocating motion of the plunger in the pump body 104. In this way, the input end of the pump body 104 begins to generate suction. In order to facilitate the application of paint by the pump body 104... The pump body 104 is equipped with a suction pipe 4 and a delivery pipe 6 at its input and output ends, respectively. The end of the delivery pipe 6 away from the pump body 104 is connected to the filter assembly 2. The filter assembly 2 is equipped with a spray gun assembly for atomizing the paint. When the pump body 104 is working, the paint can be delivered to the filter assembly 2 through the delivery pipe 6. After being filtered by the filter assembly 2, the paint is sprayed out from the spray gun assembly. In this way, the filter assembly 2 can prevent the spray gun assembly from clogging when the sprayer is working.

[0034] The filter assembly 2 includes a filter tank 21 mounted on the main body 1 of the spraying machine and having an open top. A plug 221 is screwed into the opening at the top of the filter tank 21 to facilitate cleaning of the interior of the filter tank 21. An inlet connected to a liquid inlet 6 and an outlet connected to a spray gun assembly are respectively opened on the side wall at the bottom and top of the filter tank 21. An inlet channel 213 communicating with the inlet is opened in the bottom of the filter tank 21, with the outlet of the inlet channel 213 facing the top of the filter tank 21. A cylindrical filter screen 26 is installed inside the filter tank 21, and the inlet... The outlet end of channel 213 is located inside filter screen 26, and the top of filter screen 26 is connected to the bottom of plug 221, while the bottom of filter screen 26 is connected to the bottom of filter tank 21. Thus, when the feed pipe delivers paint to filter tank 21, the paint enters filter tank 21 through inlet channel 213. Because the outlet end of inlet channel 213 is located inside the cylindrical filter screen 26, the paint needs to pass through filter screen 26 before flowing out from the outlet and into the spray gun assembly. This allows particles mixed with the paint to be filtered by filter screen 26, while particles mixed with the paint are trapped within filter screen 26. The filter assembly 2 filters the coating material. A rotating shaft 27 is installed in the filter tank 21, with its top rotatably connected to the bottom of the plug 221. A turbine fan 28 is fixedly installed at the bottom of the rotating shaft 27, with its blades positioned above the outlet of the inlet channel 213. When the coating material enters the filter tank 21 through the inlet channel 213, it impacts the blades of the turbine fan 28, causing the turbine fan 28 to rotate the rotating shaft 27. Since the coating material enters the filter tank 21 via the pump body 104, the impact effect of the coating material on the turbine fan 28 is ensured. This ensures the rotation of the rotating shaft 27. Multiple connecting rods 271 are evenly and symmetrically arranged on the rotating shaft 27, and a scraper 272 for scraping the inner wall of the filter screen 26 is provided at one end of each connecting rod 271 near the filter screen 26. Thus, when the rotating shaft 27 rotates, the scraper 272 can scrape the inner wall of the filter screen 26, thereby preventing the filter screen 26 from being clogged by paint particles. This ensures the filtration effect of the filter screen 26 on the paint, thus ensuring the spraying effect of the sprayer on the paint and also ensuring that the sprayer can be used for a long time. The sprayer body 1 and the spray gun assembly are mature existing technologies and therefore are not described in detail in this application.

[0035] Furthermore, to facilitate the maintenance of the filter screen 26, a first connecting ring 261 is provided at the top of the filter screen 26 and screwed to the bottom of the plug 221. When disassembling the filter screen 26, simply unscrew the plug 221 from the opening of the filter canister 21. At the same time, when removing the plug 221, the filter screen 26 can also be removed from the filter canister 21 along with the plug 221. This facilitates the maintenance of the filter screen 26. In order to ensure the stability of the filter screen 26 in the filter canister 21, a second connecting ring 262 is provided at the bottom of the filter screen 26. At the same time, a positioning groove 212 matching the second connecting ring 262 is opened at the bottom of the filter canister 21. The second connecting ring 262 is inserted into the positioning groove 212. In order to ensure the strength of the filter screen 26, multiple support bars 263 are evenly arranged on the outer wall of the filter screen 26, and the top and bottom of the support bars 263 are connected to the first connecting ring 261 and the second connecting ring 262, respectively.

[0036] Furthermore, in order to improve the stability of the rotating shaft 27 when it rotates in the filter tank 21, a bearing 275 is provided on the rotating shaft 27, and the inner ring of the bearing 275 is fixedly connected to the rotating shaft 27. Multiple support rods 274 are arranged circumferentially on the outer ring of the bearing 275, and a support ring 273 is provided at the end of the support rod 274 away from the bearing 275, which abuts against the inner wall of the filter screen 26.

[0037] Furthermore, in order to facilitate the connection between the infusion tube 6, the spray gun assembly and the filter assembly 2, a pipe joint 23 is screwed into the inlet and outlet respectively. At the same time, in order to ensure the sealing of the pipe joint 23 connection, a first sealing gasket 231 is provided at the end of the pipe joint 23 near the filter tank 21.

[0038] Furthermore, in order to facilitate the detection of the internal pressure of the filter canister 21, a pressure sensor 24 for detecting the internal pressure of the filter canister 21 is also provided on the filter canister 21. At the same time, in order to ensure the sealing of the connection of the pressure sensor 24, a second sealing gasket 241 is provided at the end of the pressure sensor 24 near the filter canister 21.

[0039] Furthermore, in order to ensure the sealing effect between the first sealing gasket 231 and the second sealing gasket 241 and the outer wall of the filter tank 21, a flat protrusion 211 is provided on the side wall of the filter tank 21 where the pipe joint 23 and the pressure sensor 24 are located. The first sealing gasket 231 and the second sealing gasket 241 respectively abut against the surface of the protrusion 211, thus ensuring the fit between the first sealing gasket 231 and the second sealing gasket 241 and the outer wall of the filter tank 21, thereby ensuring the sealing effect between the first sealing gasket 231 and the second sealing gasket 241 and the outer wall of the filter tank 21.

[0040] Furthermore, in order to reduce the weight of the sprayer, the drive unit 101 in the main body 1 of the sprayer is a brushless motor. At the same time, in order to facilitate the placement of the sprayer when using it, two support frames 3 are detachably installed at the bottom of the main body 1 of the sprayer.

[0041] Furthermore, to ensure the safety of the filter assembly 2, a reflux valve 25 for pressure relief is also provided on the filter tank 21.

[0042] Furthermore, in order to ensure the airtight connection between the plug 221 and the filter tank 21, a third sealing gasket 222 is provided at the bottom of the plug 221, and the third sealing gasket 222 abuts against the inside of the top opening of the filter tank 21. At the same time, in order to facilitate turning the plug 221, a knob 22 is provided at the top of the plug 221.

[0043] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] The above provides a detailed description of the plunger-type spraying machine provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A plunger-type spraying machine, comprising a spraying machine body, wherein a filter assembly is provided on the spraying machine body, characterized in that: The filtering component includes A filter tank is installed on the main body of the spraying machine. The top of the filter tank is open. An inlet and an outlet are respectively opened on the side wall of the bottom and the side wall of the top of the filter tank. An inlet channel communicating with the inlet is opened in the bottom of the filter tank. The outlet end of the inlet channel faces the top of the filter tank. A plug is installed on the top of the filter tank and is screwed to the filter tank; A filter screen is installed in a filter tank. The filter screen is cylindrical, and the outlet end of the liquid inlet channel is located inside the filter screen. The top of the filter screen is connected to the bottom of the plug, and the bottom of the filter screen is connected to the bottom of the filter tank. A rotating shaft is installed in the filter tank. The top of the rotating shaft is rotatably connected to the bottom of the plug. A turbine fan is fixedly installed at the bottom of the rotating shaft. The blades of the turbine fan are located above the liquid outlet end of the liquid inlet channel. Multiple connecting rods are evenly and symmetrically arranged on the rotating shaft. Each connecting rod has a scraper at one end near the filter screen for scraping the inner wall of the filter screen.

2. The plunger-type spraying machine according to claim 1, characterized in that: The filter screen has a first connecting ring at the top, which is screwed to the bottom of the plug. The filter screen has a second connecting ring at the bottom. The bottom of the filter tank has a positioning groove that matches the second connecting ring. The second connecting ring is inserted into the positioning groove. Multiple support strips are evenly arranged on the outer wall of the filter screen. The top and bottom of the support strips are connected to the first connecting ring and the second connecting ring, respectively.

3. The plunger-type spraying machine according to claim 1, characterized in that: A bearing is provided on the rotating shaft. The inner ring of the bearing is fixedly connected to the rotating shaft. Multiple support rods are arranged circumferentially on the outer ring of the bearing. A support ring that abuts against the inner wall of the filter screen is provided at the end of the support rod away from the bearing.

4. A plunger-type spraying machine according to claim 1, characterized in that: A pipe connector is screwed into each of the inlet and outlet, and a first sealing gasket is provided at the end of each pipe connector near the filter tank.

5. A plunger-type spraying machine according to claim 1, characterized in that: The filter can is also equipped with a pressure sensor for detecting the internal pressure of the filter can, and the pressure sensor has a second sealing gasket at one end near the filter can.

6. A plunger-type spraying machine according to any one of claims 4-5, characterized in that: On the outer wall of the filter tank, on the side wall where the pipe joint and pressure sensor are located, there is a raised block with a flat surface.

7. A plunger-type spraying machine according to claim 1, characterized in that: The drive unit in the main body of the spraying machine is a brushless motor.

8. A plunger-type spraying machine according to claim 1, characterized in that: The bottom of the spraying machine body is detachably equipped with two support frames.

9. A plunger-type spraying machine according to claim 1, characterized in that: The filter tank is also equipped with a reflux valve for pressure relief.

10. A plunger-type spraying machine according to claim 1, characterized in that: The bottom of the plug is provided with a third sealing gasket, which abuts against the inside of the top opening of the filter tank, and the top of the plug is provided with a knob.

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