A spray device

Abstract

The utility model discloses a spraying device belongs to spraying equipment technical field, including material pot, spray gun, pump and base, and pump has import and export, material pot detachable installation is in base, and pump is located in base, and the bottom of material pot is equipped with switch valve, and base is equipped with the communication structure for the switch valve and import, and material pot is installed on the base, and the switch valve is switched from the closed state to the open state, and the switch valve is switched from the open state to the closed state when material pot is separated from the base. Since material pot detachable installation is in base, when the coating in material pot has some surplus after spraying, material pot can be separated from base and the surplus coating is poured out or poured back to the material bucket, so the difficulty of pouring out coating or pouring back coating can be reduced. In addition, since material pot is detachable, when material pot is damaged, only material pot needs to be replaced, so the replacement cost can be reduced.

Description

[0001] This application claims priority to Chinese Utility Model Application No. 202422063549.7, filed with the China National Intellectual Property Administration on August 23, 2024, entitled "A Spraying Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This utility model relates to the field of spraying equipment technology, and in particular to a spraying device. Background Technology

[0003] Existing spraying equipment mainly consists of a feeding device, a spray gun, and an atomizing device. The paint in the feeding device is pumped to the spray gun under pressure. The paint releases pressure at the nozzle of the spray gun and is instantly atomized before being sprayed onto the surface of the object to be coated to form a coating. Spraying equipment is suitable for industries such as furniture manufacturing, construction, and automobile manufacturing.

[0004] Spraying equipment can be categorized into handheld and pedestal types based on its usage. Handheld sprayers have smaller paint tanks and are lighter overall, allowing users to easily hold the device. Pedestal sprayers have larger paint tanks, holding more paint, but are also heavier. The spray gun connects to a high-pressure pump via a hose, allowing users to simply hold the gun and begin spraying, reducing the difficulty of use. In existing pedestal sprayers, the paint tank is typically fixed directly to the base. Users estimate the required paint area based on the desired coverage and pour it into the tank. When too much paint is poured in, resulting in leftover paint, it needs to be poured back into the container. Because the tank is fixed to the base, the overall weight of the equipment is significant, making it difficult to pour back paint, especially when there is a lot left, which negatively impacts the user experience. Furthermore, since the tank is directly fixed to the base, if the tank breaks, the entire machine needs to be replaced, increasing operating costs. Utility Model Content

[0005] In order to overcome the shortcomings and deficiencies of the existing technology, the present invention provides a spraying device in which the material container is detachably installed on the base, which can reduce the difficulty of use and the replacement cost.

[0006] To achieve the above-mentioned technical objectives, this utility model provides a spraying device, comprising:

[0007] A paint container, used to hold paint;

[0008] A spray gun is used to atomize and spray high-pressure paint.

[0009] A pump is used to pressurize and pump the paint in the paint pot to the spray gun. The pump has an inlet and an outlet.

[0010] It also includes a base, a detachable container that is installed on the base, a pump located inside the base, a switch valve at the bottom of the container, and a connection structure on the base for connecting the switch valve to the inlet. The container installed on the base switches the switch valve from the closed state to the open state, and the container detached from the base switches the switch valve from the open state to the closed state.

[0011] Preferably, the switching valve includes a valve seat, a valve plate, and an elastic element. The valve seat has a valve hole, the valve plate is movably disposed on the valve seat and used to open and close the valve hole, and the elastic element biases the valve plate toward the direction of closing the valve hole.

[0012] Preferably, the connecting structure includes a connecting channel, in which a push rod corresponding to the switching valve is provided. The feed pot installed on the base causes the valve plate to contact the push rod so that the valve plate overcomes the bias pressure of the elastic element and opens the valve hole.

[0013] Preferably, the connecting channel is provided with a detachable filter element, the filter element has multiple evenly spaced filter holes, and a top rod is provided on the filter element.

[0014] Preferably, the switch valve is located on the bottom wall of the container, and the bottom wall of the container extends downward at an angle from a position away from the switch valve toward the position where the switch valve is located.

[0015] Preferably, the partial top wall of the base located below the container extends downwards from a position away from the connecting structure toward the location of the connecting structure, and the slope of the partial top wall of the base is greater than the slope of the bottom wall of the container.

[0016] Preferably, the bottom of the container is provided with a downwardly protruding support foot, the bottom surface of the support foot is lower than the bottom surface of the switch valve, and the base is provided with a positioning hole for the support foot to be inserted; and / or, the base is provided with a latch for fixing the container, and the container is provided with a locking block or locking groove that cooperates with the latch.

[0017] Preferably, the pump includes a motor, a pump body, and a transmission structure. The pump body is horizontally placed inside the base, and the central axis of the pump body is set lower than the bottom wall of the container.

[0018] Preferably, the base includes a bottom shell, a top shell, and a cover shell. The top shell and the cover shell are fixed side by side on the bottom shell. The feed pot is detachably installed on the top of the top shell. The cover shell and the bottom shell cooperate to form an installation cavity, and the pump is located in the installation cavity.

[0019] Preferably, the cover has a recessed storage cavity.

[0020] Preferably, the pump is further provided with a drain port, and a return pipe is connected to the drain port. The return pipe guides the paint flowing out of the drain port to the paint jug or the connecting structure.

[0021] Preferably, the return pipe guides the paint flowing from the drain port into the container. One end of the return pipe is connected to the drain port, and the other end of the return pipe is provided with a first return connector. The first return connector is directly fixed to the base or detachably fixed to the base. The container is provided with a second return connector that is detachably matched with the first return connector. The container installed on the base allows the second return connector to be inserted into the first return connector so that the other end of the return pipe is connected to the inside of the container. The container detached from the base separates the second return connector from the first return connector.

[0022] Preferably, the return pipe guides the paint flowing out of the drain port into the connecting structure. The return pipe is located on the base and one end is connected to the drain port, and the other end is connected to the connecting structure.

[0023] By adopting the above technical solution, this utility model has the following advantages:

[0024] 1. The spraying device provided by this utility model features a detachable paint container mounted on a base, with a switch valve at the bottom. The valve is closed when the paint container is detached from the base, preventing paint from flowing out or leaking. When the paint container is mounted on the base, the valve switches from closed to open, allowing the paint to be smoothly supplied to the spray gun by the pump, thus enabling the device to operate normally. Because the paint container is detachable from the base, any remaining paint after spraying can be removed from the base and poured out or returned to the container, reducing the difficulty for the user. Furthermore, the detachable design allows for easy replacement of the paint container when damaged, reducing replacement costs. Moreover, the detachable design allows the device to be equipped with two or more paint containers for different paints, enabling users to change the paint container according to spraying needs without emptying it, thus improving spraying efficiency.

[0025] 2. The switching valve includes a valve seat, a valve plate, and a spring element. The valve seat is provided with a valve hole, and the spring element biases the valve plate toward the direction of closing the valve hole. By reasonably setting the specific structure of the switching valve, the switching valve is in the closed state under normal conditions, and the switching valve can be easily switched from the closed state to the open state.

[0026] 3. A push rod is installed in the connecting channel. When the container is installed on the base, the push rod contacts the valve plate, causing the valve plate to overcome the bias pressure of the elastic element and move in the direction of opening the valve orifice, thereby opening the valve orifice and allowing the paint in the container to flow to the pump through the connecting channel. A properly designed connecting structure ensures that the switch valve can smoothly switch from the closed to the open state when the container is installed on the base.

[0027] 4. A removable filter element is installed within the connecting channel. This filter element has multiple evenly spaced filter holes to filter the paint flowing towards the pump through the connecting structure, preventing impurities from entering the pump and causing blockages. Because the filter element is removable within the connecting channel, it can be easily removed for cleaning after operation. A push rod is mounted on the filter element, and the push rod and filter element are integrated, which can appropriately reduce the number of components and simplify the installation of the push rod.

[0028] 5. The switch valve is located on the bottom wall of the container. The bottom wall of the container slopes downward from a position away from the switch valve towards the switch valve. The specific structure of the container is reasonably designed so that the paint in the container can flow out through the switch valve when the device is working, thus avoiding paint waste.

[0029] 6. The base is located below the paint container, with a partial slope on the bottom wall. The slope of the top wall of the base is greater than that of the bottom wall of the paint container. When the paint container is filled with a lot of paint, the bottom wall of the paint container will bulge downwards. The slope of the top wall of the base avoids the slope of the bottom wall of the paint container, allowing the paint container to be installed smoothly on the base.

[0030] 7. The bottom of the container is equipped with downward-protruding support feet, the bottom surface of which is lower than the bottom surface of the valve. When the container is placed alone on the ground, the support feet are in contact with the ground, preventing the valve from touching the ground, thus avoiding accidental opening of the valve and preventing damage from stress. The base is provided with positioning holes for the support feet to insert into. When the container is installed on the base, the support feet are inserted into the positioning holes to limit the container's position, improving the stability of the container installed on the base.

[0031] The base is equipped with a latch, and the container is equipped with a locking block or locking groove. The container is locked by the cooperation of the latch and the locking block or the latch and the locking groove, so that the container is stably installed on the base and the container is prevented from vibrating or shifting relative to the base when the device is working.

[0032] 8. The pump includes a motor, a pump body, and a transmission structure. The pump body is placed horizontally in the base. The central axis of the pump body is preferably set lower than the bottom wall of the container, that is, the pump body is set lower than the container. By reasonably setting the height relationship between the pump body and the container, the paint in the container can be made to flow to the pump faster through the connecting structure by the pump's pumping action, using the paint's own weight.

[0033] 9. The base includes a bottom shell, a top shell, and a cover shell. The top shell and the cover shell are fixed side by side on the bottom shell. The material pot can be detachably installed on the top of the top shell. The cover shell and the bottom shell cooperate to form an installation cavity. The pump is located in the installation cavity. The specific structure of the base is reasonably designed so as to reasonably arrange the material pot, pump and other components, making the overall structure more compact.

[0034] 10. The cover has a recessed storage cavity, in which components such as spray guns and hoses can be placed when not in use, which can prevent the spray guns and hoses from being collided with other objects. Attached Figure Description

[0035] Figure 1 This is a complete drawing of the spraying device in Example 1;

[0036] Figure 2 This is a structural diagram of the spraying device in Example 1 when the material container is detached from the base;

[0037] Figure 3 This is a structural diagram of the material container in the spraying device of Example 1;

[0038] Figure 4 This is a cross-sectional view of the coating container in the spraying device of Embodiment 1 along the left-right direction;

[0039] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0040] Figure 6 This is an exploded view of the switching valve in the spraying device of Example 1;

[0041] Figure 7 This is an exploded view of a portion of the switching valve and the material container in the spraying device of Example 1;

[0042] Figure 8 This is an exploded view of the base in the spraying device of Example 1;

[0043] Figure 9 This is a structural diagram of the top shell in the spraying device of Embodiment 1;

[0044] Figure 10 This is a cross-sectional view of the top shell along the front-to-back direction in the spraying device of Embodiment 1;

[0045] Figure 11 This is a structural diagram of the pump installed in the base in the spraying device of Example 1;

[0046] Figure 12 This is a structural diagram of the pump body in the spraying device of Example 1;

[0047] Figure 13 This is a structural diagram of the base in the spraying device of Example 2;

[0048] Figure 14 This is an exploded view of the pump body and return pipe in Example 2;

[0049] Figure 15 This is a structural diagram of the glass container in Example 2;

[0050] Figure 16This is a cross-sectional view of the reflux pipe and the feed pot in Example 2 when the first reflux connector and the second reflux connector are inserted and mated.

[0051] Figure 17 This is a partial structural diagram of the base in Embodiment 3;

[0052] Figure 18 This is an exploded view of the pump body and return pipe in Example 3;

[0053] Figure 19 This is a cross-sectional view of the top shell along the front-back direction in Embodiment 3.

[0054] In the diagram, 100 is the material container, 110 is the container body, 111 is the side wall, 112 is the bottom wall, 113 is the mounting hole, 114 is the support leg, 115 is the second hollow column, 116 is the second reflux connector, 120 is the container lid, 130 is the locking block, and 140 is the slot.

[0055] 210 - Spray gun, 220 - Hose, 230 - Second connector

[0056] 300-Pump, 301-Inlet, 302-Outlet, 310-Motor, 320-Pump body, 321-Feed pipe, 322-Discharge pipe, 323-Pressure relief pipe, 3231-First hollow column, 324-Drain port, 330-Transmission structure, 340-First connector, 350-Knob

[0057] 400-Switch valve, 410-Valve seat, 411-Valve bore, 412-Seat ring, 413-Support bar, 414-Top block, 415-Flange, 420-Valve plate, 430-Elastic element, 440-Sealing ring.

[0058] 500-Base, 510-Connecting structure, 511-Connecting channel, 511a-Stepped surface, 512-Top rod, 513-Filter element, 514-Filter hole, 520-Bottom shell, 521-Cavity, 522-Allowing hole, 530-Top shell, 531-Upright plate, 532-Positioning surface, 533-Positioning hole, 534-Pipe shell, 535-Third hollow column, 540-Cover shell, 550-Lock, 560-Receiving cavity, 570-Return pipe, 580-Pipe clamp, 590-First return connector. Detailed Implementation

[0059] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," and "bottom," etc., which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0060] Example 1

[0061] Combination Figures 1 to 12 The first embodiment of this utility model provides a spraying device, comprising:

[0062] Paint container 100, used for holding paint;

[0063] Spray gun 210 is used to atomize and spray high-pressure paint.

[0064] Pump 300 is used to pressurize and pump the paint in the paint pot 100 to the spray gun 210. Pump 300 has an inlet 301 and an outlet 302.

[0065] The base 500 and the material container 100 are detachably installed on the base 500. The pump 300 is located inside the base 500. The bottom of the material container 100 is provided with a switch valve 400. The base 500 is provided with a communication structure 510 for connecting the switch valve 400 and the inlet 301. The material container 100 installed on the base 500 switches the switch valve 400 from the closed state to the open state. The material container 100 detached from the base 500 switches the switch valve 400 from the open state to the closed state.

[0066] Because the paint container 100 is detachably mounted on the base 500, when there is any paint remaining in the paint container 100 after spraying, it can be detached from the base 500 and the remaining paint poured out or returned to the paint tank. This reduces the difficulty for the user in pouring out or returning paint. Furthermore, because the paint container 100 is detachable, when it is damaged, only the paint container 100 needs to be replaced, reducing replacement costs. Moreover, because the paint container 100 is detachable, the device can be equipped with two or more paint containers 100 for holding different paints. Users can change the paint container 100 containing different paints as needed without having to empty the paint container 100 when changing paints, thus improving spraying efficiency.

[0067] Combination Figure 2 , Figure 3In this embodiment, the pot 100 includes a pot body 110 and a pot lid 120. The top side of the pot body 110 is open, and the pot lid 120 is used to open and close the top side of the pot body 110. As an optional solution in this embodiment, the pot lid 120 can be hinged to the top side of the pot body 110 and fixed to the pot lid 120 by a snap-fit ​​structure. Alternatively, the pot lid 120 can be set separately from the pot body 110 and fixed to the pot lid 120 by a snap-fit ​​structure.

[0068] Combination Figure 4 The vessel body 110 of the container 100 includes a ring of side walls 111 and a bottom wall 112 at the lower end of the side walls 111. The switch valve 400 is preferably located on the bottom wall 112 of the vessel body 110. Figure 5 , Figure 6 , Figure 7 The bottom wall 112 of the kettle body 110 is provided with a mounting hole 113, and the switch valve 400 is located at the mounting hole 113. Specifically, the switch valve 400 includes a valve seat 410, a valve plate 420, and an elastic element 430. The valve seat 410 is provided with a valve hole 411. The valve plate 420 is movably disposed on the valve seat 410 and is used to open and close the valve hole 411. The elastic element 430 biases the valve plate 420 toward the direction of closing the valve hole 411. Further, the valve seat 410 includes a seat ring 412 that mates with the mounting hole 113 and a top block 414 that is supported above the seat ring 412 by support bars 413. The valve hole 411 is formed by the seat ring 412. Two or three support bars 413 are provided at intervals along the circumference of the seat ring 412. The top block 414 is set higher than the seat ring 412. A sealing ring 440 is fitted around the outer circumference of the seat ring 412. The seat ring 412 is axially positioned at the mounting hole 113, and the sealing ring 440 achieves a circumferential sealing fit between the seat ring 412 and the mounting hole 113. A raised edge 415 is provided on the inner circumferential surface of the seat ring 412. The valve plate 420 is located between the raised edge 415 and the top block 414. The top end of the elastic member 430 abuts against the top block 414 for positioning, and the bottom end of the elastic member 430 abuts against the valve plate 420 for contact. The elastic member 430 is in a compressed state and biases the valve plate 420 downward. Under the biasing action of the elastic member 430, the valve plate 420 abuts against the raised edge 415, so that the valve hole 411 is closed, and the paint in the container 100 cannot flow out through the valve hole 411. When the valve plate 420 moves upward against the bias of the elastic element 430, it disengages from the flange 415, opening the valve orifice 411. The paint in the container 100 can then flow out through the valve orifice 411. The elastic element 430 is further compressed when the valve plate 420 opens the valve orifice 411. As an optional embodiment, the elastic element 430 can be a spring or other elastic component. Of course, the detailed structure of the switch valve 400 is not limited to the foregoing description; the switch valve 400 only needs to meet the requirement that the container 100 is closed when detached from the base 500 and open when mounted on the base 500.

[0069] To ensure the paint in the container 100 can flow smoothly out through the valve hole 411 of the valve 400, in this embodiment, the bottom wall 112 of the container 100 preferably extends downwards at an angle from a position away from the valve 400 towards the valve 400, so that the valve 400 is located at the lowest point of the bottom wall 112. This allows the paint in the container 100 to flow towards the valve 400 under its own weight, and also allows the paint in the container 100 to flow out as much as possible through the valve hole 411 of the valve 400. For example, when the valve 400 is located at the left front corner of the bottom wall 112, the bottom wall 112 of the container 110 can extend downwards not only from right to left, but also from back to front, so that the paint can flow towards the location of the valve 400. Of course, the valve 400 can also be located at other positions on the bottom wall 112, and correspondingly, the bottom wall 112 of the container 110 extends downwards at an angle from a position away from the valve 400 towards the valve 400. As an optional solution in this embodiment, the tilt angle α of the bottom wall 112 should not be too large or too small. The tilt angle α can be set to a reasonable size such as 1°, 1.5°, 2°, 2.5°, 3°, 3.5°, 4°, 4.5°, 5°, etc.

[0070] The switch valve 400 protrudes downward relative to the bottom wall 112 of the pot body 110. To ensure the pot 100 can be stably placed on the ground, the bottom wall 112 of the pot body 110 is provided with several downwardly protruding support legs 114. The bottom surfaces of each support leg 114 are approximately flush and can be combined to form a plane. Preferably, the bottom surface of the support leg 114 is lower than the bottom surface of the switch valve 400. When the pot 100 is placed on the ground, the bottom surfaces of each support leg 114 are in contact with the ground, allowing the bottom surface of the switch valve 400 to be slightly higher than the ground, thereby preventing the switch valve 400 from being damaged by force. As an optional solution in this embodiment, the cross-sectional shape of the support legs 114 along the transverse direction can be set into a reasonable shape such as a cross, T, circle, rectangle, triangle, or ring. The support legs 114 can be distributed at the corners of the bottom wall 112 or distributed in other ways. Here, there are no excessive restrictions on the shape and distribution of the support legs 114. The height difference Δh between the bottom surface of the support leg 114 and the bottom surface of the switch valve 400 can be set to any size within the range of 2mm to 20mm.

[0071] Combination Figure 8 In this embodiment, the base 500 includes a bottom shell 520, a top shell 530, and a cover 540. The top shell 530 and the cover 540 are fixed to the bottom shell 520 side by side. The feed pot 100 is detachably installed on the top of the top shell 530. The cover 540 and the bottom shell 520 cooperate to form a mounting cavity, and the pump 300 is disposed in the mounting cavity. Specifically, the bottom shell 520 is arranged with a lower front and a higher rear, the top shell 530 is fixed to the top side of the rear of the bottom shell 520, and the cover 540 is fixed to the top side of the front of the bottom shell 520.

[0072] To ensure structural stability of the container 100 during operation, the base 500 is equipped with a latch 550 for securing the container 100. The container 100 has a locking block 130 or locking groove that engages with the latch 550. Specifically, the top shell 530 has upwardly extending and oppositely arranged upright plates 531 on its left and right sides, and each upright plate 531 has a rotatable latch 550 on its top side. The container body 110 of the container 100 has outwardly protruding locking blocks 130 on its left and right sidewalls 111. When the container 100 is installed on the base 500, rotating the latch 550 engages with the locking block 130, thus securing the container 100 to the base 500. When the container 100 needs to be removed, the latch 550 is rotated to release the locking block 130, thereby disengaging the latch 550 from the locking block 130. As an alternative to this embodiment, a locking groove can be used instead of the locking block 130. In this case, a protrusion that mates with the locking groove is provided on the latch 550, and the protrusion is embedded in the locking groove when the latch 550 mates with the locking groove. As a preferred embodiment, the latch 550 or the locking groove is approximately centered in the height direction relative to the container 100. The specific structure of the latch 550 can refer to existing structures that meet the fixing requirements of the container 100, and is not limited in detail here.

[0073] The top shell 530 has a positioning surface 532 around its outer periphery on the top side, and the top shell 530 has positioning holes 533 for each support leg 114 to be inserted into. The connecting structure 510 is located directly below the switch valve 400. Since the bottom wall 112 of the container 100 is inclined, and since the bottom wall 112 of the container 100 will bulge downward and deform after being filled with paint, in order to allow the container 100 to be smoothly installed on the base 500, the portion of the top shell 530 located on the inner periphery of the positioning surface 532 extends downward from a position away from the connecting structure 510 toward the position of the connecting structure 510. That is, the partial top wall of the base 500 located below the container 100 extends downward from a position away from the connecting structure 510 toward the position of the connecting structure 510. The inclination of the inclined portion on the top shell 530 is preferably slightly greater than the inclination of the bottom wall 112 of the container 100. That is, the inclination angle β of the inclined portion of the top shell 530 relative to the horizontal plane is slightly greater than the inclination angle α of the bottom wall 112 of the container 110. For example, the inclination angle β can be set to a reasonable size such as 7°, 8°, 9°, 10°, 11°, 12°, etc.

[0074] The bottom shell 520 has a cavity 521 located below the top shell 530. When the pot 100 is placed on the base 500, the support leg 114 passes through the positioning hole 533 on the top shell 530. The pot 100 can be vertically supported by the contact between the bottom surface of the pot 100 and the positioning surface 532, or by the contact between the bottom surface of the support leg 114 and the inner bottom wall of the cavity 521.

[0075] Combination Figure 9 , Figure 10 The connecting structure 510 includes a connecting channel 511, one end of which faces upward and corresponds to the switching valve 400, and the other end of which faces the pump 300 and connects to the inlet 301 of the pump 300. Specifically, the top shell 530 has a hollow tube shell 534 at the position corresponding to the switching valve 400, and the hollow inner cavity of the tube shell 534 forms the connecting channel 511. The bottom shell 520 has a clearance hole 522 for avoiding the tube shell 534. As an optional solution in this embodiment, the tube shell 534 can be integrally formed with the top shell 530, or the tube shell 534 can be formed independently and then fixed to the top shell 530 by fasteners.

[0076] To ensure the smooth opening of the switch valve 400 when the container 100 is mounted on the base 500, a push rod 512 corresponding to the switch valve 400 is provided in the connecting channel 511. The container 100 mounted on the base 500 causes the valve plate 420 to contact the push rod 512, allowing the valve plate 420 to move upward against the bias of the elastic element 430 and open the valve orifice 411. To prevent impurities in the paint from flowing into the pump 300 and causing blockage, a detachable filter element 513 is also provided in the connecting channel 511. The filter element 513 has multiple evenly spaced filter holes 514, and the push rod 512 is preferably located on the filter element 513. Specifically, the connecting channel 511 has a horizontal stepped surface 511a on the inner wall facing the switch valve 400. The filter element 513 installed in the connecting channel 511 is vertically supported by contact with the stepped surface 511a. The push rod 512 protrudes upward relative to the filter element 513. When the container 100 is installed on the base 500, the push rod 512 abuts against the valve plate 420. The valve plate 420 is forced to move upward against the bias of the elastic element 430, thereby opening the valve hole 411. When the container 100 is removed from the base 500, the push rod 512 releases the valve plate 420, and the elastic element 430, having recovered its deformation, moves the valve plate 420 downward, thereby closing the valve hole 411. As an optional embodiment, the push rod 512 and the filter element 513 can be integrally formed, or the push rod 512 can be formed independently and then fixed to the filter element 513.

[0077] Combination Figure 11Pump 300 includes a motor 310, a pump body 320, and a transmission structure 330. Inlet 301 and outlet 302 are located on the pump body 320. The pump body 320, transmission structure 330, and motor 310 are distributed sequentially from left to right. Motor 310 is preferably vertically oriented axially, and pump body 320 is preferably horizontally oriented axially. The transmission structure 330 converts the rotational motion of motor 310 into the reciprocating motion of a piston. Figure 12 The pump body 320 is equipped with an inlet pipe 321 and an outlet pipe 322. An inlet 301 is located on the inlet pipe 321, and an outlet 302 is located on the outlet pipe 322. A casing 534 is fitted over the inlet pipe 321 at one end facing the pump body 320, thus connecting the connecting channel 511 to the inlet 301. Both the inlet pipe 321 and the outlet pipe 322 are equipped with check valves. When the motor 310, through the transmission structure 330, draws paint into the pump body 320, the check valve in the inlet pipe 321 is open, and the check valve in the outlet pipe 322 is closed. When the motor 310, through the transmission structure 330, pumps paint out of the pump body 320, the check valve in the inlet pipe 321 is closed, and the check valve in the outlet pipe 322 is open. The pump 300 in this embodiment can be a single-plunger pump, a double-plunger pump, a triple-plunger pump, a diaphragm pump, etc., as long as it meets the pumping requirements of the coating. The specific structure of the pump 300 can be referred to the prior art, and will not be described in detail here.

[0078] As a preferred embodiment, the pump body 320 is further provided with a pressure relief pipe 323, a pressure relief valve is provided inside the pressure relief pipe 323, and a discharge port 324 is provided in the pressure relief pipe 323. A knob 350 for adjusting the pressure relief valve's predetermined pressure relief value is provided on the side wall 111 of the base 500. A return pipe 570 is provided on the base 500. One end of the return pipe 570 is connected to the discharge port 324, and the other end is detachably fixed to the top side of the pot body 110. A slot 140 for the return pipe 570 to be inserted is provided on the side wall 111 of the pot body 110. When the hydraulic pressure in the pump chamber of the pump body 320 is less than the predetermined pressure relief value of the pressure relief valve, the pressure relief valve is in the closed state, and the paint in the pump chamber is completely discharged through the outlet 302. When the hydraulic pressure in the pump chamber reaches the predetermined pressure relief value of the pressure relief valve, the pressure relief valve switches to the open state. The paint in the pump chamber can flow back to the material container 100 through the drain port 324 and the return pipe 570, preventing damage to the pump body 320 due to excessive hydraulic pressure in the pump chamber. The specific structure of the pressure relief valve can be found in existing technology and will not be described in detail here.

[0079] To improve the pumping effect of pump 300 on the coating, the central axis L of pump body 320 is preferably set below the bottom wall 112 of container 100, that is, pump body 320 is set slightly below container 100. When the device is working, the coating can be used to make the coating in container 100 flow to pump 300 more quickly through the connecting structure 510 under the pumping action of pump 300.

[0080] A first connector 340 is sleeved on the outside of the discharge pipe 322 of the pump body 320, and the first connector 340 is exposed on the side of the base 500. The spray gun 210 is connected to the pump 300 through a hose 220. One end of the hose 220 is fixedly or detachably connected to the spray gun 210, and the other end of the hose 220 is provided with a second connector 230 that mates with the first connector 340. The first connector 340 and the second connector 230 can be detachably and fixedly connected through a threaded or screw-locked structure. The spray gun 210 is provided with a discharge valve, and the spray gun 210 is provided with a trigger for opening and closing the discharge valve. The discharge valve is normally closed. When the user presses the trigger, the discharge valve switches to the open state, and the high-pressure paint flowing through the discharge valve is atomized and sprayed out through the nozzle at the front end of the spray gun 210 and adheres to the surface of the object. The specific structure of the spray gun 210 can be referred to the existing technology, and will not be repeated here. Of course, an automatic opening and closing pressure valve can be used instead of the discharge valve and trigger. The pressure valve automatically opens when the pressure of the paint reaches the preset value so that the paint is atomized and sprayed out through the nozzle.

[0081] The housing 540 has a recessed storage cavity 560. When the device is not in use, accessories such as the spray gun 210 and hose 220 can be placed in the storage cavity 560 to prevent the spray gun 210, hose 220 and other components from being collided with other objects.

[0082] When paint needs to be sprayed, the paint is poured into the paint container 100 and then the paint container 100 is installed on the base 500, or the paint container 100 is installed on the base 500 and then the paint is poured into the paint container 100. The hose 220 is connected to the pump 300 through the cooperation of the second connector 230 and the first connector 340, so that the spray gun 210 is connected to the pump 300. The paint container 100 installed on the base 500 switches the switch valve 400 from the closed state to the open state. When the pump 300 is working, the paint in the paint container 100 is filtered by the filter element 513 and flows into the pump chamber of the pump body 320 from the inlet 301 along the connecting channel 511. After being pressurized, the paint flowing into the pump chamber flows through the outlet 302 and the hose 220 to the spray gun 210. When the user presses the trigger to open the discharge valve, the paint is atomized and sprayed out through the nozzle at the front end of the spray gun 210 and adheres to the surface of the object. When there is any paint remaining in the paint pot 100 after spraying, the paint pot 100 can be removed from the base 500 and the paint can be poured out or poured back into the paint bucket.

[0083] The device in this embodiment can also adopt a structure in which a base 500 is configured with two or more paint tanks 100. When different paints need to be sprayed, the user can change the paint tank 100 containing different paints in a timely manner according to the spraying needs, and there is no need to pour out the paint in the paint tank 100 when changing the paint, which can improve the spraying efficiency.

[0084] After spraying, water can be added to the paint pot 100 and the pump 300 can be started for self-cleaning, so that the paint pot 100, the connecting structure 510, the pump 300 and the spray gun 210 are kept clean, and the residual paint can be prevented from solidifying and causing the spraying effect to deteriorate.

[0085] As a preferred embodiment, in order to facilitate the movement of the entire device, rollers with brakes can be provided at the bottom of the base 500.

[0086] The spraying device of this embodiment can be configured as a pedestal type or a backpack type. When using a pedestal type, the user can place the device on the ground. When using a backpack type, the user can carry the device using a shoulder strap. Of course, the spraying device of this embodiment can also be configured to switch between pedestal and backpack types as needed. In this case, the device is equipped with a shoulder strap, the two ends of which are connected to the base. The shoulder strap preferably adopts a detachable installation structure, allowing the user to install the shoulder strap as needed.

[0087] Example 2

[0088] Combination Figure 13 , Figure 14 , Figure 15 In this embodiment, the pressure relief pipe 323 is provided with a first hollow column 3231 protruding outward around the vent 324. One end of the return pipe 570 is fixedly sleeved on the first hollow column 3231 by a pipe clamp 580. The return pipe 570 passes through the base 500, and the other end of the return pipe 570 extends upward and is provided with a hollow first return connector 590. The first return connector 590 can be directly fixed to the cover 540 of the base 500 by fasteners such as screws, or it can be detachably fixed to the cover 540 of the base 500 by components such as hooks and clips. The side wall of the pot body 110 is provided with a second hollow column 115 protruding outward. The hole on the second hollow column 115 communicates with the interior of the pot 100. A hollow second return connector 116 is fixedly sleeved at the second hollow column 115. The second return connector 116 and the first return connector 590 are detachably engaged.

[0089] Combination Figure 16 When the container 100 is installed on the base 500, the second return connector 116 is inserted into the first return connector 590, and the two are circumferentially sealed. The upper end of the return pipe 570 is connected to the interior of the container 100 through the first return connector 590 and the second return connector 116. When the hydraulic pressure in the pump chamber reaches the predetermined pressure relief value and the pressure relief valve opens to relieve pressure, the paint flowing out from the drain port 324 flows back into the container 100 through the return pipe 570.

[0090] When the container 100 is detached from the base 500, the second return connector 116 separates from the first return connector 590.

[0091] To reduce the difficulty of connecting the second return connector 116 and the first return connector 590, the upper part of the first return connector 590 can be set into a tapered structure that is larger at the top and smaller at the bottom.

[0092] In order to minimize the interference caused by the insertion and mating of the second return connector 116 and the first return connector 590 on the installation of the container 100 on the base 500, the return pipe 570 and the drain port 324 are preferably located on the same side relative to the base 500, and the return pipe 570 and the first return connector 590 are arranged to avoid the mating area between the container 100 and the cover 540.

[0093] To prevent the paint in the container 100 from flowing into the return pipe 570 through the second hollow column 115, the second hollow column 115 should be positioned as high as possible relative to the container body 110. Preferably, the second hollow column 115 can be positioned slightly above the maximum holding capacity line of the container 100.

[0094] The other contents of Example 2 are the same as those of Example 1, and will not be repeated here.

[0095] Example 3

[0096] Combination Figure 17 , Figure 18 , Figure 19 In this embodiment, the return pipe 570 is disposed on the base 500. One end of the return pipe 570 is connected to the drain port 324, and the other end of the return pipe 570 is connected to the connecting structure 510. The paint flowing out from the drain port 324 flows back to the connecting structure 510 through the return pipe 570. Specifically, the pressure relief pipe 323 is provided with a first hollow column 3231 protruding outward around the drain port 324, and the pipe shell 534 is provided with a third hollow column 535 protruding outward. The hole on the third hollow column 535 is connected to the connecting channel 511. The return pipe 570 is disposed at the bottom of the base 500. One end of the return pipe 570 is fixedly sleeved on the first hollow column 3231 by a pipe clamp 580, and the other end of the return pipe 570 is fixedly sleeved on the third hollow column 535. When the hydraulic pressure in the pump chamber reaches the predetermined pressure relief value, causing the pressure relief valve to open and release pressure, the paint flowing out from the discharge port 324 flows back into the connecting channel 511 of the connecting structure 510 through the return pipe 570.

[0097] In this embodiment, since the return pipe 570 is located on the base 500 and one end is connected to the pump body 320 and the other end is connected to the connecting structure 510, there is no connection between the return pipe 570 and the container 100. This eliminates the restriction caused by the return pipe 570 on the installation and removal of the container 100. In other words, when the user installs the container 100 on the base 500 or removes the container 100 from the base 500, there is no need to consider the return pipe 570, which is beneficial to improving the user experience.

[0098] The other contents of Example 3 are the same as those of Example 1, and will not be repeated here.

[0099] In addition to the preferred embodiments described above, there are other embodiments of this utility model. Those skilled in the art can make various changes and modifications based on this utility model. As long as they do not depart from the spirit of this utility model, they should all fall within the scope defined in the claims of this utility model.

Claims

1. A spraying apparatus, comprising: A paint container, used to hold paint; A spray gun is used to atomize and spray high-pressure paint. A pump is used to pressurize and pump the paint in the paint pot to the spray gun. The pump has an inlet and an outlet. The invention is characterized by including a base, a detachable container mounted on the base, a pump located inside the base, a switch valve at the bottom of the container, and a connection structure on the base for connecting the switch valve to the inlet. The container mounted on the base switches the switch valve from a closed state to an open state, and the container detached from the base switches the switch valve from an open state to a closed state.

2. The spraying device according to claim 1, characterized in that, The switching valve includes a valve seat, a valve plate, and an elastic element. The valve seat has a valve hole, the valve plate is movably mounted on the valve seat and is used to open and close the valve hole, and the elastic element biases the valve plate toward the direction of closing the valve hole.

3. The spraying device according to claim 2, characterized in that, The connecting structure includes a connecting channel, in which a push rod corresponding to the switching valve is provided. The feed pot installed on the base makes the valve plate contact the push rod so that the valve plate overcomes the bias pressure of the elastic element and opens the valve hole.

4. A spraying device according to claim 3, characterized in that, The connecting channel is equipped with a detachable filter element, which has multiple evenly spaced filter holes, and a top rod is mounted on the filter element.

5. A spraying device according to claim 1, characterized in that, The switch valve is located on the bottom wall of the container, and the bottom wall of the container extends downwards at an angle from a position away from the switch valve toward the position where the switch valve is located.

6. A spraying apparatus according to claim 5, characterized in that, The base, located below the container, has a partial top wall that extends downwards from a position away from the connecting structure toward the location of the connecting structure, and the slope of the partial top wall of the base is greater than the slope of the bottom wall of the container.

7. A spraying device according to claim 1, characterized in that, The bottom of the container is provided with a downward protruding support foot, the bottom surface of which is lower than the bottom surface of the switch valve, and the base is provided with a positioning hole for inserting the support foot; and / or, the base is provided with a latch for fixing the container, and the container is provided with a locking block or locking groove that cooperates with the latch.

8. A spraying apparatus according to claim 1, characterized in that, The pump includes a motor, a pump body, and a transmission structure. The pump body is horizontally placed inside the base, and the central axis of the pump body is set lower than the bottom wall of the container.

9. A spraying device according to claim 1, characterized in that, The base includes a bottom shell, a top shell, and a cover shell. The top shell and the cover shell are fixed side by side on the bottom shell. The feed pot can be detachably installed on the top of the top shell. The cover shell and the bottom shell cooperate to form an installation cavity, and the pump is installed in the installation cavity.

10. A spraying apparatus according to claim 9, characterized in that, The cover has a recessed storage cavity.

11. A spraying apparatus according to claim 1, characterized in that, The pump is also equipped with a drain port, and a return pipe is connected to the drain port. The return pipe guides the paint flowing out of the drain port to the paint jug or connecting structure.

12. A spraying apparatus according to claim 11, characterized in that, The return pipe guides the paint flowing out of the drain port into the container. One end of the return pipe is connected to the drain port, and the other end of the return pipe is provided with a first return connector. The first return connector is directly fixed to the base or can be detachably fixed to the base. The container is provided with a second return connector that can be detachably matched with the first return connector. The feed pot installed on the base allows the second reflux connector to be inserted into the first reflux connector so that the other end of the reflux pipe can communicate with the inside of the feed pot. The detachment of the feed container from the base causes the second return connector to separate from the first return connector.

13. A spraying apparatus according to claim 11, characterized in that, The return pipe guides the paint flowing out of the drain port into the connecting structure. The return pipe is located on the base and one end is connected to the drain port and the other end is connected to the connecting structure.

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