Spray powder sprayer and its base shell

Abstract

The present invention discloses a base shell of a spray powder spraying machine, which relates to the field of spray equipment. The base shell comprises a base, a valve body connected to the upper end of the base, an installation cavity formed in the base, an air outlet provided on the base, and a feed channel connected to the air outlet provided on the valve body. The base comprises a front seat shell and a rear seat shell, and the valve body comprises a front valve shell and a rear valve shell. The front seat shell and the front valve shell are integrally arranged to form a front splicing portion, and the rear seat shell and the rear valve shell are integrally arranged to form a rear splicing portion. The side wall of the feed channel is provided with a fixing groove for installing a guide pipe, and the front valve shell and the rear valve shell are also provided with corresponding installation grooves for installing a baffle. The provision of the front splicing portion and the rear splicing portion makes the overall installation more convenient, the overall production efficiency is higher, and the repair of the impeller is more convenient. In addition, the sealing performance of the base shell is improved, while the overall weight of the machine is reduced and the overall firmness is increased.

Description

Technical Field

[0001] The present invention relates to the field of spray equipment, and more particularly to a spray powder spraying machine and a machine base shell thereof. Background Art

[0002] The spray powder machine is a motorized plant protection machine driven by a gasoline engine and adopts the principles of air flow powder delivery, air pressure liquid delivery and pneumatic spraying. It mainly includes components such as a frame, a centrifugal fan, a gasoline engine, a fuel tank, a medicine box and a spraying device.

[0003] For example, the Chinese invention patent with patent number CN107568185A discloses a spray powder spraying machine, which includes a centrifugal fan and a powder door control valve connected to the upper end of the centrifugal fan, wherein the powder door control valve includes a valve body, a discharge cavity is provided in the valve body, a discharge hopper connected to the bottom of the medicine box is provided on the upper side of the valve body, a bucket mouth connected to the discharge cavity is provided at the lower end of the discharge hopper, a discharge port connected to the discharge cavity is provided at the bottom end of the valve body, a rotating shaft is provided at the side near the bucket mouth obliquely above the discharge port on the upper side of the valve body, a baffle for opening and closing the bucket mouth is provided at the lower end of the discharge hopper, an end of the baffle away from the discharge port is fixed on the rotating shaft, the discharge port is square, a guide pipe inserted into the centrifugal fan is connected to the discharge port, and the cross section of the end of the guide pipe connected to the discharge port is square. After the baffle is rotated, the bottom end of the baffle is located in the guide pipe and fits against its side wall, and the inner pipe wall of the guide pipe has an arc transition downward along the discharge port.

[0004] The base shell of the spray powder machine mainly serves as a base for installing the impeller of the centrifugal fan and a valve body for installing the various components of the powder gate control valve. Since the valve body needs to be installed on the material guide pipe, the material guide pipe needs to be connected to the base and tilted along the air outlet of the centrifugal fan. The material guide pipe cannot block the air outlet of the centrifugal fan too much and affect the range of the spray powder machine. Therefore, in existing production, the valve body is separated from the base, and the material guide pipe is raised through the valve body to achieve normal powder spraying operation. However, such a setting requires the assembly of multiple components in the production of the spray powder machine, which makes the overall production efficiency low and is relatively troublesome, and needs to be improved. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides a base shell of a spray powder spraying machine, which has the advantages of being more convenient to assemble and thus having higher production efficiency.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A base shell of a spray powder sprayer includes a base and a valve body connected to the upper end of the base, a mounting cavity being formed in the base, an air outlet being further provided on the base, and a feed channel communicating with the air outlet being provided on the valve body; the base includes a front seat shell and a rear seat shell, the valve body includes a front valve shell and a rear valve shell, the front seat shell and the front valve shell being integrally arranged to form a front joint, and the rear seat shell and the rear valve shell being integrally arranged to form a rear joint; a fixing groove for mounting a flow guide pipe is provided on a side wall of the feed channel, and mounting grooves for mounting a baffle are correspondingly provided on the front valve shell and the rear valve shell.

[0008] With the above technical solution, when the base housing needs to be assembled, it is only necessary to install the impeller, guide tube, and baffle accordingly, then splice the front and rear splicing parts, and then secure them with multiple bolts passing through the front and rear splicing parts. Compared to the existing operation of assembling the base first, then installing the valve body, the guide tube and baffle on the valve body, and finally tightening the valve body to the base with screws, the provision of the front and rear splicing parts makes the overall installation more convenient, improves overall production efficiency, and improves the overall sealing of the base housing by reducing the number of splicing components.

[0009] In addition, the provision of the front and rear joints reduces the number of molds and the cost of molds. When the impeller malfunctions and requires repair, only the front and rear joints need to be disassembled. This makes impeller repair more convenient than the existing method of disassembling the valve body and then the base.

[0010] In addition, by setting the front splicing part and the rear splicing part, the use of fixing parts between the valve body and the base is reduced, which reduces the overall weight of the machine to a certain extent; in addition, the more parts are assembled, the easier they are to be damaged. The setting of the front splicing part and the rear splicing part can also increase the overall firmness.

[0011] In a preferred example, the present invention can be further configured as follows: a partition is provided in the feed channel, the partition is located on the side of the feed channel away from the air outlet, the side of the partition close to the air outlet is used to resist the side wall of the guide tube, and the side of the partition away from the air outlet is formed with a return air channel connected to the installation cavity.

[0012] Through the above technical solution, jet atomization is based on the Venturi injection principle, using compressed air to form a high-speed airflow through a small pipe orifice. The negative pressure generated drives the liquid or other fluid to be sprayed onto the obstruction. Under the high-speed impact, the droplets splash around, turning into mist-like particles and spraying out from the outlet pipe. A return air channel is provided, which can guide the airflow formed in the installation cavity to the feed flow channel of the valve body. When used as a whole, the airflow in the return air flow channel passes through the guide pipe and drives the liquid medicine in the guide pipe to impact the airflow discharged from the installation cavity to the outlet. The setting of the return channel can timely replenish the air pressure of the feed flow channel, making the pressure difference between the feed flow channel and the outlet more stable, so that the atomization effect of the spray powder sprayer is better when used.

[0013] In a preferred example, the present invention can be further configured as follows: an air guide duct connected to the arc of the air outlet is provided in the installation cavity; a guide surface is provided at the lower end of the side wall of the return air channel away from the air outlet, and the guide surface is inclined downward toward the side away from the air outlet, and the guide surface is tangent to the outer wall of the air guide duct; a guide plate is also provided at the lower end of the partition portion, and the guide plate is inclined downward toward the side away from the air outlet, and the lower end of the guide plate is lower than the upper end of the guide surface, and a guide plate is provided at the upper end of the side wall of the return air channel away from the air outlet.

[0014] The above technical solution optimizes the air inlet of the return air duct by setting the guide surface and the guide plate, making the airflow from the guide duct enter the return air duct more stable and convenient. The guide plate can optimize the airflow direction at the outlet end of the guide duct, making the return air duct and the guide pipe have a better atomization effect.

[0015] In a preferred example, the present invention can be further configured as follows: the upper end surface of the partition is inclined downward toward the side close to the air outlet, the mounting grooves are all located at the upper end of the partition, and the guide plate is an arc plate for guiding the airflow to between the baffle and the partition.

[0016] Through the above technical solution, in actual use, the baffle installed on the mounting groove cooperates with the upper end face of the partition and the front and rear inner walls of the valve body to form a flow channel. The airflow flowing through the return air flow channel is guided by the guide plate and then enters the flow channel between the baffle and the partition for further guidance, so that the return airflow can also push the liquid medicine in the guide tube, thereby achieving a better return air atomization effect.

[0017] In a preferred example, the present invention can be further configured as follows: the lower end surface of the partition is arranged to be inclined downward toward the air outlet, and a receiving groove is provided on a side of the partition close to the air outlet.

[0018] Through the above technical solution, a receiving groove is provided, and a flange can be provided on the side of the upper end of the guide tube close to the receiving groove. The flange on the guide tube can be correspondingly embedded in the receiving groove, thereby making the sealing effect of the joint between the partition and the guide tube better, reducing the situation where the liquid medicine or powder enters the impeller and affects the rotation of the impeller, making the overall use more stable.

[0019] In a preferred example, the present invention can be further configured as follows: sealing grooves are further provided on the front splicing portion and the rear splicing portion, and the sealing grooves are arranged around the side walls of the installation cavity and the feed channel.

[0020] Through the above technical solution, a sealing groove is opened, and when the front splicing part and the rear splicing part are assembled, a sealing strip can be embedded in the sealing groove to strengthen the seal, thereby making the overall use more stable.

[0021] In a preferred example, the present invention can be further configured as follows: the outer side walls of the front splicing part and the rear splicing part are provided with reinforcing ribs, and the reinforcing ribs are provided at the transition between the valve body and the base.

[0022] Through the above technical solution, the structural strength of the connection between the valve body and the base is strengthened by reinforcing ribs, thereby increasing the overall structural firmness.

[0023] In a preferred example, the present invention can be further configured as follows: the base is arranged in a volute shape, an air inlet is provided on the front seat shell, a plurality of ventilation holes are provided on the rear seat shell, a plurality of mounting plates are fixed to the outer wall of the rear seat shell, the mounting plates form an annular area, and the ventilation holes are arranged to be connected to the annular area accordingly.

[0024] With the above technical solution, when the housing is used in a spray powder sprayer, the mounting plate provides a secure mounting for the drive motor and other components. When the drive motor rotates, the impeller rotates, drawing air into the air inlet and discharging it through the air guide to the outlet. Ventilation holes are provided to allow some of the air within the mounting cavity to be discharged into the annular area. This exhaust air dissipates heat from the drive motor, ensuring more stable and durable operation.

[0025] In a preferred example, the present invention can be further configured as follows: a guide groove corresponding to the ventilation hole is provided on the rear seat shell, the width of the guide groove is gradually increased along the rotation direction of the impeller, and the ventilation holes are all provided at one end of the width of the guide groove.

[0026] Through the above technical solution, a guide groove is provided, which can guide the airflow in the installation cavity, so that the airflow enters the vent hole more stably, thereby making the cooling effect of the vent hole more stable.

[0027] A spray powder spraying machine comprises any one of the above-mentioned machine base shells.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The arrangement of the front and rear joints makes the overall installation more convenient, which increases the overall production efficiency. At the same time, it reduces the overall weight of the machine, increases the overall firmness, and also makes the repair of the impeller more convenient;

[0030] (2) By setting up a return air channel, the atomization effect of the spray powder sprayer is better when used;

[0031] (3) By setting the guide surface, the guide plate and the guide plate, the air flow direction of the air guide channel can be optimized, so that the atomization effect of the return air channel and the guide pipe is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is an overall schematic diagram of Example 1;

[0033] Figure 2 This is a structural diagram of the front splicing portion of Example 1;

[0034] Figure 3 This is a schematic structural diagram of the rear splicing portion of Example 1, used to illustrate the structure of one side of the installation cavity;

[0035] Figure 4 for Figure 3 A magnified schematic diagram of part A in FIG;

[0036] Figure 5 This is a structural diagram of the rear splicing portion of Example 1, used to illustrate the outer side structure of the rear splicing portion.

[0037] Figure markings: 1. base; 11. front seat shell; 12. rear seat shell; 2. valve body; 21. front valve shell; 22. rear valve shell; 3. air inlet; 4. mounting cavity; 5. air outlet; 6. feed channel; 7. front splicing part; 8. rear splicing part; 9. reinforcing rib; 10. sealing groove; 13. partition; 14. accommodating groove; 15. fixing groove; 16. mounting groove; 17. air guide channel; 18. return air channel; 19. guide surface; 20. guide plate; 23. guide plate; 24. mounting plate; 25. ventilation hole; 26. guide groove. DETAILED DESCRIPTION

[0038] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0039] Example 1:

[0040] A base shell of a spray powder spraying machine, such as Figure 1As shown, the valve comprises a base 1 and a valve body 2 connected to the upper end of the base 1. The base 1 is volute-shaped and includes a front housing 11 and a rear housing 12. The front housing 11 of the base 1 is provided with an air inlet 3. An installation cavity 4 is formed within the base 1. The base 1 is also provided with an air outlet 5, which is located on the side of the base 1. The valve body 2 comprises a front housing 21 and a rear housing 22. The valve body 2 is provided with a feed channel 6 that communicates with the air outlet 5 and the installation cavity 4.

[0041] like Figure 2 、 Figure 3 As shown, the front seat shell 11 and the front valve shell 21 are integrally arranged to form the front splicing part 7, and the rear seat shell 12 and the rear valve shell 22 are integrally arranged to form the rear splicing part 8. The front splicing part 7 and the rear splicing part 8 are usually made of plastic and can be injection molded. The outer side walls of the front splicing part 7 and the rear splicing part 8 are provided with reinforcing ribs 9, and the reinforcing ribs 9 are arranged correspondingly at the transition between the valve body 2 and the base 1. The front splicing part 7 and the rear splicing part 8 are also provided with sealing grooves 10, which are arranged around the side walls of the installation cavity 4 and the feed channel 6. When the front splicing part 7 and the rear splicing part 8 are assembled, a sealing strip can be embedded in the sealing groove 10 to enhance the seal.

[0042] A partition 13 is also provided within the feed channel 6. This partition 13 is located near the side of the feed channel 6 away from the air outlet 5. The partition 13 is divided into two sections, symmetrically arranged and fixed to the front and rear joints 7 and 8, respectively. When the front and rear joints 7 and 8 are joined, the two sections abut against each other to form the partition 13.

[0043] like Figure 2 、 Figure 3 As shown, the front valve housing 21 and the rear valve housing 22 also have corresponding mounting slots 16. Both mounting slots 16 are located at the upper end of the partition 13. The mounting slot 16 of the front valve housing 21 is circular. During installation, the mounting slots 16 primarily accommodate the baffle. One end of the baffle's rotating shaft extends through the front valve housing 21 and connects to a control unit on the outside of the base. The control unit is well known in the art and primarily controls the baffle's tilt angle, so a detailed description thereof will not be provided here.

[0044] like Figure 3 、 Figure 4As shown, the upper end face of the partition 13 is tilted downward toward the side close to the air outlet 5, the lower end of the partition 13 is arranged in an arc shape, and the lower end face of the partition 13 is tilted downward toward the air outlet 5. A receiving groove 14 is provided on the side of the partition 13 close to the air outlet 5, and a fixing groove 15 is also provided on the side wall of the feed channel 6. The fixing grooves 15 are respectively provided on the inner side walls of the front splicing part 7 and the rear splicing part 8. When the guide tube is installed in the machine base shell, the upper end of the guide tube is usually folded outward to form a flange. The flange can be positioned correspondingly to the embedded fixing groove 15 and the receiving groove 14, so that the guide tube simultaneously contacts the front and rear side walls of the guide tube and the side of the partition plate close to the air outlet 5, reducing the situation where the liquid or powder enters the impeller and affects the rotation of the impeller.

[0045] An air guide channel 17 connected to the air outlet 5 in an arc shape is provided in the installation cavity 4, and a return air channel 18 connected to the air guide channel 17 of the installation cavity 4 is formed on the side of the partition 13 away from the air outlet 5. A guide surface 19 is provided at the lower end of the side wall of the return air channel 18 away from the air outlet 5. The guide surface 19 is inclined downward toward the side away from the air outlet 5, and the guide surface 19 is tangent to the outer wall of the air guide channel 17. A guide plate 20 is also provided at the lower end of the partition 13. The guide plate 20 is inclined downward toward the side away from the air outlet 5, and the lower end of the guide plate 20 is lower than the upper end of the guide surface 19. The setting of the guide surface 19 and the guide plate 20 optimizes the air inlet of the return air channel, making it more stable and convenient for the airflow of the air guide channel 17 to enter the return air channel.

[0046] A deflector 23 is provided at the upper end of the sidewall of the return air duct 18, away from the air outlet 5. This deflector 23 is an arc-shaped plate. The side of the deflector 23 near the air outlet 5 is higher than the upper end of the partition 13, and the tangent of the deflector 23 near the air outlet 5 is tilted downward toward the air outlet 5. When the spray duster is operating, the deflector 23 is used to direct the return airflow between the baffle and the partition 13. The baffle, in conjunction with the upper end surface of the partition 13 and the front and rear inner walls of the valve body 2, forms a flow channel, allowing the return airflow to push the liquid medicine in the guide tube.

[0047] like Figure 3 、 Figure 5As shown, several mounting plates 24 are fixed to the outer wall of the rear housing 12, forming an annular area. Several threaded holes are provided on the end of the mounting plates 24 facing away from the rear housing 12. When the machine housing is used in a spray powder sprayer, the mounting plates 24 can be used to mount and secure the drive motor, etc. The rear housing 12 is provided with several ventilation holes 25. In this embodiment, two ventilation holes 25 are provided, each connected to the annular area. The rear housing 12 is provided with guide grooves 26 corresponding to the ventilation holes 25. The width of the guide grooves 26 gradually increases along the direction of impeller rotation, and the ventilation holes 25 are all located at the wide end of the guide grooves 26. The guide grooves 26 guide the airflow within the mounting cavity 4, ensuring that airflow stably enters and passes through the vents. The airflow discharged from the vents can dissipate heat from the drive motor.

[0048] Example 2:

[0049] A spray powder sprayer includes the base housing of Example 1, wherein the air outlet 5 of the base housing is further connected to a nozzle (not shown). An impeller (not shown) is rotatably connected within the mounting cavity 4 of the base housing. A drive motor (not shown) is correspondingly fixed to the mounting plate 24 of the base housing. The drive motor is used to drive the impeller to rotate, causing air to be drawn into the air inlet 3 of the base housing and discharged through the air outlet. A medicine box (not shown) is further provided at the upper end of the base housing, a flow guide tube (not shown) is provided within the base housing, and a baffle (not shown) is further rotatably connected within the base housing. A control unit (not shown) is connected to the outer side of the base housing. The baffle is located above the flow guide tube, and the control unit is used to control the baffle's flip angle, thereby controlling the connection or blocking between the medicine box and the feed channel 6.

[0050] The provision of the front and rear joints 7 and 8 facilitates overall installation, improves overall production efficiency, and facilitates repair of the impeller. Furthermore, the provision of the front and rear joints 7 and 8 reduces the number of parts to be joined, reduces the use of fixings, reduces the overall weight of the machine, and increases overall robustness.

[0051] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A base shell of a spray powder sprayer, comprising a base (1), a valve body (2) connected to the upper end of the base (1), a mounting cavity (4) formed in the base (1), an air outlet (5) provided on the base (1), and a feed channel (6) connected to the air outlet (5) provided on the valve body (2); characterized in that: The base (1) includes a front seat shell (11) and a rear seat shell (12), and the valve body (2) includes a front valve shell (21) and a rear valve shell (22), the front seat shell (11) and the front valve shell (21) are integrally arranged to form a front splicing portion (7), and the rear seat shell (12) and the rear valve shell (22) are integrally arranged to form a rear splicing portion (8); a fixing groove (15) for installing a guide pipe is provided on the side wall of the feed channel (6), and a mounting groove (16) for installing a baffle is also correspondingly provided on the front valve shell (21) and the rear valve shell (22); A partition (13) is provided in the feed channel (6), and the partition (13) is provided on a side close to the feed channel (6) and away from the air outlet (5). The side of the partition (13) close to the air outlet (5) is used to abut against the side wall of the guide tube, and the side of the partition (13) away from the air outlet (5) is formed with a return air channel (18) communicating with the installation cavity (4); An air guide channel (17) that is in arc communication with the air outlet (5) is provided in the installation cavity (4); a guide surface (19) is provided at the lower end of the side wall of the return air channel (18) away from the air outlet (5), and the guide surface (19) is arranged to be inclined downward toward the side away from the air outlet (5), and the guide surface (19) is arranged tangentially to the outer wall of the air guide channel (17); a guide plate (20) is further provided at the lower end of the partition (13), and the guide plate (20) is arranged to be inclined downward toward the side away from the air outlet (5), and the lower end of the guide plate (20) is arranged lower than the upper end of the guide surface (19), and a guide plate (23) is provided at the upper end of the side wall of the return air channel (18) away from the air outlet (5); The lower end surface of the partition (13) is arranged to be inclined downward in the direction of the air outlet (5), and a receiving groove (14) is provided on a side of the partition (13) close to the air outlet (5); The upper end surface of the partition (13) is arranged to be inclined downward toward the side close to the air outlet (5), the mounting grooves (16) are all arranged at the upper end of the partition (13), and the guide plate (23) is arranged in the form of an arc plate for guiding the airflow to between the baffle and the partition (13).

2. The base shell of the spray powder spraying machine according to claim 1, characterized in that: The front splicing portion (7) and the rear splicing portion (8) are further provided with sealing grooves (10), and the sealing grooves (10) are arranged around the side walls of the installation cavity (4) and the feed channel (6).

3. The base shell of the spray powder spraying machine according to claim 1, characterized in that: The outer side walls of the front splicing portion (7) and the rear splicing portion (8) are provided with reinforcing ribs (9), and the reinforcing ribs (9) are provided at the transition between the valve body (2) and the base (1).

4. The base shell of the spray powder spraying machine according to claim 1, characterized in that: The base (1) is arranged in a volute shape, an air inlet (3) is provided on the front seat shell (11), a plurality of ventilation holes (25) are provided on the rear seat shell (12), a plurality of mounting plates (24) are fixed to the outer side wall of the rear seat shell (12), the mounting plates (24) form an annular area, and the ventilation holes (25) are arranged to be connected to the annular area.

5. The base shell of the spray powder spraying machine according to claim 4, characterized in that: The rear seat shell (12) is provided with a guide groove (26) corresponding to the ventilation hole (25), and the width of the guide groove (26) is gradually increased along the rotation direction of the impeller. The ventilation holes (25) are all located at the wide end of the guide groove (26).

6. A spray powder spraying machine, characterized in that: It comprises the base shell described in any one of claims 1-5.

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