A gear pump for a spraying system

Abstract

This utility model relates to the field of gear pump technology and discloses a gear pump for a spraying system, including a housing. A gear pump assembly is disposed inside the housing, and a drive shaft is movably disposed through one side of the housing. By adding a filter device on the inlet side, the paint entering the gear pump assembly can be pre-filtered, effectively intercepting impurities (such as particles and debris) in the paint, preventing impurities from entering the gear pump assembly and causing gear wear, jamming, and other malfunctions, thus extending the service life of the gear pump. At the same time, it prevents impurities from affecting the surface quality of the sprayed workpiece when sprayed out with the paint. The filter device adopts a matching structure of mounting cylinder, mounting base, insert rod, and socket. When the filter needs to be cleaned or replaced, simply move the insert rod to disengage it from the socket, and the filter can be quickly removed from the opening of the mounting cylinder. The operation is simple and convenient, greatly shortening maintenance time, reducing maintenance costs, and ensuring the continuity of spraying operations.

Description

Technical Field

[0001] This utility model relates to the field of gear pump technology, and in particular to a gear pump for a spraying system. Background Technology

[0002] A gear pump for spraying is a device specifically designed for paint delivery and metered spraying. Its design and working principle make it play an important role in the spraying industry. The working principle of a gear pump is based on the volume change formed by gear meshing. When the gear rotates, the volume of the cavity on the disengaged side of the gear increases, creating a vacuum, and the paint is drawn in. As the gear continues to rotate, the paint is pushed to the cavity on the meshing side of the gear, the volume decreases, and the paint is squeezed out and delivered to the spraying equipment. The pump's flow rate is proportional to the rotation speed, and the output flow rate can be controlled by adjusting the rotation speed.

[0003] In existing technologies, the coatings used for spraying are easily mixed with particulate impurities, dried debris, or external dust during storage and transportation. Moreover, the feed inlets of traditional gear pumps are mostly not equipped with effective filtration structures, or only use simple filters and lack convenient fixing and disassembly designs. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a gear pump for a spraying system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A gear pump for a spraying system includes a housing, a gear pump assembly disposed in the inner cavity of the housing, and a drive shaft movably passing through one side of the housing, the drive shaft being connected to the gear pump assembly; The upper and lower sides of the shell are respectively provided with an inlet and an outlet that communicate with the inner cavity of the shell, and a filter device is provided on one side of the inlet; The filtering device includes a mounting cylinder disposed on one side of the housing, mounting seats on both sides of the mounting cylinder, an opening on one side of the mounting cylinder that is connected to a feed inlet, a filtering device disposed inside the opening, an insertion port on both sides of the filtering device, and a mounting port on one side of each of the two mounting seats, with a rod movably disposed in the mounting port, the rod movably extending through the mounting cylinder into the insertion port.

[0006] Preferably, a spring is provided on the outer periphery of the insertion rod, and the two ends of the spring are respectively connected to the inner cavity of the mounting port and the insertion rod.

[0007] Preferably, the filtration device includes two placement plates disposed on the inner wall of the opening, a mounting frame disposed on the placement plates, and a filter screen disposed within the mounting frame, with the two insertion ports respectively disposed on both sides of the mounting frame.

[0008] Preferably, a guide block is provided on the side of the insertion rod near the insertion port, and the guide block is trapezoidal.

[0009] Preferably, a housing is provided on one side of the housing, the drive shaft moves through the housing, a receiving groove is provided on one side of the housing for storing lubricant, and an injection assembly is provided on one side of the housing; A first sealing component is provided on the side of the receiving groove near the housing, and a second sealing component is provided on the side of the receiving groove away from the housing. The lubricant in the receiving groove will continuously lubricate the first sealing component and the second sealing component.

[0010] Preferably, the gear pump assembly includes a driven shaft rotatably disposed within the housing cavity and a driven gear disposed on the outer periphery of the driven shaft, wherein a driving gear is disposed at the portion of the drive shaft located within the housing, and the driving gear and the driven gear are meshed together.

[0011] Preferably, the injection assembly includes a first connecting pipe disposed on one side of the housing, one end of the first connecting pipe being connected to a receiving groove, and a second connecting pipe being installed at the other end of the first connecting pipe via a connector. An oil inlet is provided on one side of the second connecting pipe, and a sealing cap is provided on one side of the oil inlet.

[0012] Preferably, the connector is a transparent observation tube for observing the condition of the lubricating fluid in the containment tank.

[0013] Preferably, an exhaust port is provided on one side of the outer casing, and an exhaust plug is provided on one side of the exhaust port.

[0014] Preferably, a bearing is provided inside the housing, and the bearing is sleeved on the outer periphery of the drive shaft.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention, by incorporating a gear pump assembly within the housing and driving it via a drive shaft, along with inlets and outlets on the upper and lower sides, achieves stable paint delivery within the spraying system, providing a continuous and reliable power source for spraying operations. A filter device is added to one side of the inlet to pre-filter the paint entering the gear pump assembly, effectively intercepting impurities (such as particles and debris) and preventing them from entering the gear pump assembly and causing gear wear, jamming, or other malfunctions, thus extending the service life of the gear pump. Simultaneously, it prevents impurities from affecting the surface quality of the sprayed workpiece when sprayed with the paint. The filter device employs a structure consisting of a mounting cylinder, mounting base, insert rod, and insertion port. When the filter needs cleaning or replacement, simply move the insert rod to detach it from the insertion port, allowing for quick removal of the filter from the opening of the mounting cylinder. This simple and convenient operation significantly reduces maintenance time and costs, ensuring the continuity of spraying operations. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of a gear pump for a spraying system proposed in this utility model; Figure 2 This is a schematic diagram of the front bearing of a gear pump for a spraying system proposed in this utility model; Figure 3 This is a schematic diagram of the outer shell and inner shell of a gear pump for a spraying system proposed in this utility model; Figure 4 This utility model proposes a gear pump for a spraying system. Figure 3 Enlarged view of point A.

[0017] In the diagram: 1. Housing; 2. Drive shaft; 3. Outer shell; 4. Receiving groove; 5. First sealing assembly; 6. Second sealing assembly; 7. Driven shaft; 8. Driven gear; 9. Driven gear; 10. Inlet; 11. Outlet; 12. First connecting pipe; 13. Second connecting pipe; 14. Oil inlet; 15. Transparent observation tube; 16. Sealing cover; 18. Vent plug; 19. Bearing; 20. Mounting cylinder; 21. Mounting base; 22. Opening; 23. Insertion port; 24. Mounting port; 25. Insert rod; 26. Spring; 27. Placement plate; 28. Mounting frame; 29. ​​Filter screen; 30. Guide block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figures 1 to 4 A gear pump for a spraying system includes a housing 1, a gear pump assembly is disposed in the inner cavity of the housing 1, and a drive shaft 2 is movably disposed through one side of the housing 1, the drive shaft 2 being connected to the gear pump assembly; The upper and lower sides of the housing 1 are respectively provided with an inlet 10 and an outlet 11 that communicate with the inner cavity of the housing 1, and a filter device is provided on one side of the inlet 10. The filtering device includes a mounting cylinder 20 disposed on one side of the housing 1. Mounting seats 21 are provided on both sides of the mounting cylinder 20. An opening 22 is provided on one side of the mounting cylinder 20. The opening 22 is connected to the feed inlet 10. A filtering device is disposed in the inner cavity of the opening 22. An insertion port 23 is provided on both sides of the filtering device. An installation port 24 is provided on one side of each of the two mounting seats 21. An insertion rod 25 is movably disposed in the installation port 24. The insertion rod 25 movably passes through the mounting cylinder 20 and extends into the insertion port 23.

[0020] In use, this device utilizes a gear pump assembly installed within the housing 1, driven by a drive shaft 2. This, combined with the feed inlets 10 and outlets 11 on the upper and lower sides, ensures stable delivery of paint within the spraying system, providing a continuous and reliable power source for the spraying operation. A filter device is added to one side of the feed inlet 10 to pre-filter the paint entering the gear pump assembly, effectively intercepting impurities (such as particles and debris) and preventing them from entering the gear pump assembly, causing gear wear, jamming, or other malfunctions, thus extending the service life of the gear pump. Simultaneously, it prevents impurities from affecting the surface quality of the sprayed workpiece. The filter device employs a structure consisting of an mounting cylinder 20, a mounting base 21, a rod 25, and an insertion port 23. When the filter needs cleaning or replacement, simply move the rod 25 to disengage it from the insertion port 23, allowing the filter to be quickly removed from the opening 22 of the mounting cylinder 20. This simple and convenient operation significantly reduces maintenance time and costs, ensuring the continuity of the spraying operation.

[0021] In the example of this application, a spring 26 is provided on the outer periphery of the insertion rod 25, and the two ends of the spring 26 are respectively connected to the inner cavity of the mounting port 24 and the insertion rod 25.

[0022] As a preferred example of this utility model, a spring 26 is provided on the outer periphery of the insertion rod 25, with both ends of the spring 26 connected to the inner cavity of the mounting port 24 and the insertion rod 25 respectively, forming an elastic reset structure. When the filter equipment needs to be installed, the insertion rod 25 is pushed to compress the spring 26. After the insertion port 23 of the filter equipment is aligned with the position of the insertion rod 25, the spring 26 releases its elastic force to push the insertion rod 25 to automatically insert into the insertion port 23, thereby achieving rapid fixation of the filter equipment and preventing the insertion rod 25 from accidentally dislodging from the insertion port 23 due to vibration or other factors during the operation of the gear pump, thus ensuring the stability of the filter device installation. At the same time, when disassembling the filter equipment, it is only necessary to overcome the elastic force of the spring 26 to pull the insertion rod 25, further improving the convenience of disassembling and assembling the filter device, and no additional tools are required, simplifying the operation process.

[0023] In the example of this application, the filtration device includes two placement plates 27 disposed on the inner wall of the opening 22, a mounting frame 28 disposed on the placement plates 27, and a filter screen 29 disposed in the mounting frame 28, with the two inlets 23 respectively disposed on both sides of the mounting frame 28.

[0024] As a preferred example of this utility model, the placement plate 27, mounting frame 28, and filter screen 29 provide stable support for the mounting frame 28, preventing the filter screen 29 from shifting or shaking due to paint impact, ensuring stable filtration area, and improving filtration effect. On the other hand, the filter screen 29 is set inside the mounting frame 28, and the insertion ports 23 on both sides of the mounting frame 28 cooperate with the insertion rods 25 to achieve overall assembly and disassembly. When the filter screen 29 is clogged or damaged, the mounting frame 28 with the filter screen 29 can be directly replaced without disassembling the filter screen 29 separately, further improving maintenance efficiency.

[0025] In the example of this application, a guide block 30 is provided on the side of the insertion rod 25 near the insertion port 23, and the guide block 30 is trapezoidal.

[0026] As a preferred example of this utility model, a trapezoidal guide block 30 is provided on the side of the insertion rod 25 near the insertion port 23 to serve as a guide and positioning function. When installing the filter equipment, even if there is a slight positional deviation between the insertion port 23 of the filter equipment and the insertion rod 25, the inclined surface of the trapezoidal guide block 30 can guide the installation frame 28 to automatically adjust its position, so that the insertion port 23 can be smoothly aligned with the insertion rod 25, reducing the difficulty of alignment during installation and improving installation efficiency.

[0027] In the example of this application, a housing 3 is provided on one side of the housing 1, the drive shaft 2 moves through the housing 3, a receiving groove 4 is provided on one side of the housing 3 for storing lubricating fluid, and an injection assembly is provided on one side of the housing 3. A first sealing component 5 is provided on the side of the receiving groove 4 near the housing 1, and a second sealing component 6 is provided on the side of the receiving groove 4 away from the housing 1. The lubricating fluid in the receiving groove 4 will continuously lubricate the first sealing component 5 and the second sealing component 6.

[0028] As a preferred example of this utility model, an outer shell 3 is provided on one side of the housing 1. A receiving groove 4 inside the outer shell 3 stores lubricating fluid, and a first sealing component 5 and a second sealing component 6 are respectively provided on both sides of the receiving groove 4. The lubricating fluid in the receiving groove 4 can continuously lubricate the two sealing components, reducing frictional loss between the sealing components and the drive shaft 2 and extending the service life of the sealing components. At the same time, the lubricating fluid can fill the tiny gap between the sealing components and the drive shaft 2, further improving the sealing effect, effectively preventing paint leakage in the gear pump, and also preventing external dust and impurities from entering the housing 1 to contaminate the paint or damage the gear pump components. The outer shell 3 covers the exposed part of the drive shaft 2, which can provide physical protection for the drive shaft 2, preventing the drive shaft 2 from being damaged by external collisions, corrosion, etc., ensuring the operating accuracy of the drive shaft 2, thereby ensuring the transmission stability of the gear pump components and maintaining the uniformity of paint delivery. The lubricating fluid can be replenished into the receiving groove 4 at any time through the injection component without disassembling the outer shell 3, which is convenient to operate and avoids accelerated wear of the sealing components due to insufficient lubricating fluid, ensuring the continuous effectiveness of sealing and lubrication functions.

[0029] Both the first sealing component 5 and the second sealing component 6 are integrally molded from rubber.

[0030] In the example of this application, the gear pump assembly includes a driven shaft 7 rotatably disposed in the inner cavity of the housing 1 and a driven gear 8 disposed on the outer periphery of the driven shaft 7. The drive shaft 2 is provided with a driving gear 9 at the part located inside the housing 1, and the driving gear 9 and the driven gear 8 are meshed together.

[0031] As a preferred example of this utility model, the drive shaft 2 drives the drive gear 9 to rotate. The drive gear 9 drives the driven gear 8 to operate synchronously with the driven shaft 7 through meshing. The volume change of the gear meshing realizes the intake and discharge of paint. The transmission efficiency is high and the operation is stable, which can ensure uniform paint delivery flow (avoiding paint interruption or over-expansion during spraying). At the same time, the gear meshing transmission structure is mature and highly reliable, reducing the probability of transmission failure.

[0032] In the example of this application, the injection assembly includes a first connecting pipe 12 disposed on one side of the housing 3. One end of the first connecting pipe 12 is connected to the receiving groove 4. The other end of the first connecting pipe 12 is connected to a second connecting pipe 13 via a connector. An oil inlet 14 is disposed on one side of the second connecting pipe 13, and a sealing cap 16 is disposed on one side of the oil inlet 14.

[0033] As a preferred example of this utility model, the injection assembly adopts a combination structure of a first connecting pipe 12, a connector, and a second connecting pipe 13. An oil inlet 14 and a sealing cap 16 are provided on one side of the second connecting pipe 13. When lubricant needs to be added, the sealing cap 16 can be opened to inject lubricant into the receiving tank 4 through the oil inlet 14, the second connecting pipe 13, and the first connecting pipe 12. The replenishment path is clear and the operation is simple. After replenishment, the sealing cap 16 is closed to prevent external impurities from entering the lubricant channel and contaminating the lubricant, ensuring the cleanliness of the lubricant and avoiding wear of the sealing assembly or drive shaft 2 due to lubricant contamination.

[0034] In the example of this application, the connector is a transparent observation tube 15, used to observe the condition of the lubricating fluid in the receiving tank 4.

[0035] As a preferred example of this utility model, the connector is designed as a transparent observation tube 15. Operators can directly observe the level and cleanliness of the lubricating fluid in the receiving tank 4 through the transparent observation tube 15. The lubricating fluid status can be monitored in real time without disassembling any parts. When the lubricating fluid level is found to be too low, it can be replenished in time. If the lubricating fluid is found to be cloudy or contains impurities, it can be replaced in time. This avoids the sealing and lubrication effect being affected by insufficient or contaminated lubricating fluid, reduces the risk of gear pump failure, and eliminates the need for frequent disassembly and inspection, reducing operational complexity and improving the convenience of equipment maintenance.

[0036] In the example of this application, an exhaust port is provided on one side of the outer casing 3, and an exhaust plug 18 is provided on one side of the exhaust port.

[0037] As a preferred example of this utility model, by providing an exhaust port and an exhaust plug 18 on one side of the housing 3, during the process of injecting lubricating fluid into the receiving tank 4, opening the exhaust plug 18 allows the air in the receiving tank 4 to be discharged through the exhaust port, preventing air from accumulating in the receiving tank 4 and forming air resistance, ensuring that the lubricating fluid can smoothly and fully fill the receiving tank 4, and ensuring the lubrication coverage of the sealing components by the lubricating fluid; at the same time, during the operation of the gear pump, if a small amount of gas is generated in the receiving tank 4 due to factors such as temperature changes, it can also be discharged through the exhaust port to prevent the gas from affecting the fluidity and sealing effect of the lubricating fluid.

[0038] In the example of this application, a bearing 19 is provided inside the housing 3, and the bearing 19 is sleeved on the outer periphery of the drive shaft 2.

[0039] As a preferred example of this utility model, by setting a bearing 19 inside the housing 3 and sleeved on the outer circumference of the drive shaft 2, the bearing 19 can convert the sliding friction of the drive shaft 2 into rolling friction, which greatly reduces the frictional resistance during the operation of the drive shaft 2, reduces the wear of the drive shaft 2, and improves the operating accuracy and smoothness of the drive shaft 2. At the same time, the bearing 19 can provide radial support for the drive shaft 2, prevent the drive shaft 2 from radially running during high-speed operation, ensure the stability of the meshing clearance between the driving gear 9 and the driven gear 8, prevent fluctuations in the paint delivery flow rate or increased gear wear due to gear meshing deviation, further extend the service life of the drive shaft 2 and the gear pump assembly, and ensure the long-term stable operation of the gear pump.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A gear pump for a spray system comprising a housing (1), characterized in that: The inner cavity of the housing (1) is provided with a gear pump assembly, and a drive shaft (2) is movably provided through one side of the housing (1), and the drive shaft (2) is connected to the gear pump assembly; The upper and lower sides of the shell (1) are respectively provided with a feed inlet (10) and a discharge outlet (11) that communicate with the inner cavity of the shell (1), and a filter device is provided on one side of the feed inlet (10). The filter device includes a mounting cylinder (20) disposed on one side of the housing (1). Mounting seats (21) are provided on both sides of the mounting cylinder (20). An opening (22) is provided on one side of the mounting cylinder (20). The opening (22) is connected to the feed inlet (10). A filter device is provided in the inner cavity of the opening (22). An insertion port (23) is provided on both sides of the filter device. An installation port (24) is provided on one side of each of the two mounting seats (21). An insertion rod (25) is movably disposed in the installation port (24). The insertion rod (25) movably passes through the mounting cylinder (20) and extends into the insertion port (23).

2. A gear pump for a spray system according to claim 1, characterized in that: A spring (26) is provided on the outer periphery of the insertion rod (25), and the two ends of the spring (26) are respectively connected to the inner cavity of the mounting port (24) and the insertion rod (25).

3. A gear pump for a spray system according to claim 1, characterized in that: The filtration device includes two placement plates (27) disposed on the inner wall of the opening (22), a mounting frame (28) disposed on the placement plates (27), and a filter screen (29) disposed in the mounting frame (28). The two inlets (23) are respectively disposed on both sides of the mounting frame (28).

4. A gear pump for a spray system according to claim 1, characterized in that: The insertion rod (25) is provided with a guide block (30) on the side near the insertion port (23), and the guide block (30) is trapezoidal.

5. A gear pump for a spray system according to claim 1, characterized in that: A housing (3) is provided on one side of the housing (1), the drive shaft (2) moves through the housing (3), a receiving groove (4) is provided on one side of the housing (3) for storing lubricating fluid, and a filling assembly is provided on one side of the housing (3). The receiving groove (4) is provided with a first sealing component (5) on the side close to the housing (1), and a second sealing component (6) is provided on the side of the receiving groove (4) away from the housing (1). The lubricant in the receiving groove (4) will continuously lubricate the first sealing component (5) and the second sealing component (6).

6. A gear pump for a spray system according to claim 5, characterized in that: The gear pump assembly includes a driven shaft (7) rotatably disposed in the inner cavity of the housing (1) and a driven gear (8) disposed on the outer periphery of the driven shaft (7). The drive shaft (2) is provided with a driving gear (9) at the part located inside the housing (1). The driving gear (9) and the driven gear (8) are meshed together.

7. A gear pump for a spray system as defined in claim 5, wherein: The injection assembly includes a first connecting pipe (12) disposed on one side of the housing (3), one end of the first connecting pipe (12) being connected to the receiving groove (4), and the other end of the first connecting pipe (12) being fitted with a second connecting pipe (13) via a connector. An oil inlet (14) is provided on one side of the second connecting pipe (13), and a sealing cap (16) is provided on one side of the oil inlet (14).

8. A gear pump for a spray system according to claim 7, characterized in that: The connector is a transparent observation tube (15) used to observe the condition of the lubricating fluid in the receiving tank (4).

9. A gear pump for a spray system according to claim 8, characterized in that: An exhaust port is provided on one side of the outer casing (3), and an exhaust plug (18) is provided on one side of the exhaust port.

10. A gear pump for a spraying system according to claim 9, characterized in that: The housing (3) is provided with a bearing (19), which is sleeved on the outer periphery of the drive shaft (2).

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