Anti-clogging wall painting machine

Abstract

The application discloses a wall spraying machine capable of preventing blockage, which comprises a machine body, a motor and a barrel installed on the machine body, an inner metal part installed in the machine body, a driving part with piston movement between the inner metal part and the motor, a cavity tube one and a cavity tube two longitudinally arranged and communicated with each other and a cavity tube three and a cavity tube four transversely arranged and communicated with each other, which are all cavities for paint movement, a one-way valve installed in the cavity tube one and the cavity tube three, and a cleaning part installed in the cavity tube two and the cavity tube four, wherein the one-way valve comprises a sealing layer arranged in the one-way valve, and the cleaning part comprises a film layer, and the sealing layer and the film layer are in a fluctuating breathing state when the positive and negative pressure of the paint is transmitted in the cavity tube one, the cavity tube two, the cavity tube three and the cavity tube four. Compared with the prior art, the one-way valve and the cleaning part can both present a dynamic change, and the adhesion of the paint is reduced to a certain extent.

Description

Technical Field

[0001] This invention relates to the field of wall spraying equipment technology, and more particularly to a wall spraying machine that can prevent clogging. Background Technology

[0002] A wall spraying machine is an electric or pneumatic tool that pressurizes paint, atomizes it into extremely fine particles through a special nozzle, and sprays it evenly onto a wall surface.

[0003] Currently, spray painting machines are very prone to clogging if used or maintained improperly. The spray guns and nozzles are the most susceptible to blockage, but the fluid pipes and pump body are also prone to clogging. Residual paint hardening inside the spray painting machine will obstruct paint flow. It should be noted that the spray guns, nozzles, and external pipes are relatively easy to clean because these components can be easily disassembled, and the blockages are visible to the naked eye, allowing for direct brushing and soaking. However, the interior of the spray painting machine cannot be directly observed and is difficult to disassemble, making cleaning relatively difficult. It requires professional tools and knowledge for disassembly, and the pressure needs to be readjusted after reassembly. The spray painting machine uses water instead of paint for cleaning, which can remove most of the residual paint, but some paint is still not completely removed, especially for plunger-type spray painting machines. The core working principle of the plunger pump is to use the reciprocating motion of the plunger, in conjunction with a one-way valve, to draw in and expel paint. The valve chamber of the one-way valve and the pipe hole connected to the one-way valve are relatively easy to clog and difficult to clean. When the one-way valve is closed, the valve ball needs to fit with the valve chamber to form a seal. Paint is easily trapped at the sealing position between the valve ball and the valve chamber, and some paint is squeezed out and eventually solidifies into flakes or particles, which affects the valve ball seal to a certain extent. It is also not easy to remove the particles during cleaning. Based on this, a structure that facilitates the removal of blockages or prevents blockages from forming as much as possible is proposed. Summary of the Invention

[0004] In view of the problems mentioned above, the technical problem to be solved by the present invention is to provide a wall spraying machine that can prevent clogging.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a wall spraying machine that can prevent clogging, including a machine body, a motor and a material cylinder installed on the machine body, an inner metal part installed inside the machine body, and a piston movement drive component between the inner metal part and the motor; The inner metal part has longitudinally arranged and interconnected cavities one and two, as well as transversely arranged and interconnected cavities three and four. Cavities one, two, three and four are all chambers for the movement of paint. One-way valves are installed in cavities one and three, and cleaning components are installed in cavities two and four. The one-way valve includes a sealing layer disposed therein, and the cleaning component includes a membrane layer. When the coating is transferred under positive and negative pressure in the first, second, third and fourth cavities, the sealing layer and the membrane layer are in a breathing state with fluctuations.

[0006] A further preferred embodiment of the present invention is: the driving component includes an output shaft fixed to the output end of the motor and extending downward into the interior of the machine body, a disc fixedly sleeved with the output shaft, a rotating shaft fixed to the lower end of the disc and eccentrically arranged, and a bearing fixedly sleeved on the outside of the rotating shaft; The inner metal part has an inwardly extending pump chamber on the side facing the bearing. The pump chamber contains a piston shaft, and the piston shaft is hinged to the bearing. The output shaft rotates to drive the piston shaft to perform piston movement. The pump chamber is connected to the transverse chamber four, and the chamber two is connected to the chamber four.

[0007] A further preferred embodiment of the present invention is as follows: a step is formed between cavity one and cavity two and at the inner end of cavity two; a step is also formed between cavity three and cavity four and at the inner end of cavity four; the diameter of cavity one is larger than the diameter of cavity two; the diameter of cavity three is larger than the diameter of cavity four; the upper end of cavity one is an inlet that is engaged with the material cylinder; and the outer side of cavity three is an outlet for connecting with the spraying pipe. The inner ends of the one-way valves in cavities one and three abut against the corresponding steps, and also abut against the cleaning components in cavities two and four respectively. The inner ends of the cleaning components in cavities two and four also abut against the corresponding steps.

[0008] A further preferred embodiment of the present invention is that the upper end and the outer end of the inner metal part are threadedly connected to limit ends, and the two sets of limit ends respectively abut against the outer end of the corresponding one-way valve.

[0009] A further preferred embodiment of the present invention is as follows: the one-way valve includes a valve seat, two sets of valve seats are respectively locked in corresponding cavity one and cavity three, a sealing cover with a hole in the middle is detachably fixed at one end of the valve seat, a sealing layer is disposed inside the sealing cover, a support end is fixed inside the valve seat, and a valve ball is also provided inside the valve seat. When the one-way valve is opened and closed, the valve ball can abut against the sealing layer and the support end respectively. A support spring for supporting the valve ball is also provided inside the valve seat.

[0010] A further preferred embodiment of the present invention is: the support end is a multi-piece sheet structure arranged in a circle, the outer end of which is pointed, and the support spring is sleeved on the support end.

[0011] A further preferred embodiment of the present invention is as follows: the sealing layer is squeezed against the valve ball when the one-way valve is closed; the sealing layer is arranged in a ring shape; the edge of the ring is bonded to the sealing cover; there is a gap between the middle position of the sealing layer and the sealing cover; and a connecting hole communicating with the gap is passed through the sealing cover.

[0012] A further preferred embodiment of the present invention is: the outer wall of the valve ball contacts the inner wall of the valve seat, and a side cavity is provided on the inner wall of the valve seat near the support end, the side cavity being used for the passage of coating material.

[0013] A further preferred embodiment of the present invention is as follows: the cleaning component includes pipe segments, two sets of pipe segments are respectively installed in their respective cavity tubes two and four, the inner wall of the pipe segment has an integral ring arranged along the axis of the pipe segment, the membrane layer is adhered to the inner side of the arranged rings, and the membrane layer and the pipe segment form a series of annularly arranged chambers, which can bulge outward or be recessed inward under positive and negative pressure.

[0014] A further preferred embodiment of the present invention is that both the sealing layer and the membrane layer are made of rubber.

[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. The inner side of the sealing cover of the one-way valve is provided with an annular rubber sealing layer, and a gap and connection hole are designed between it and the sealing cover. When the valve ball opens under pressure, the coating can enter and exit the gap through the connection hole, causing the sealing layer to produce a periodic convex-recovery undulating movement, presenting a dynamic change. This reduces the adhesion of the coating on the sealing surface to a certain extent, making it less likely for the coating to solidify and form particles or flakes. When the one-way valve is closed, leakage is less likely to occur.

[0016] 2. Clean the inner side of the component to adhere to the elastic membrane layer. When the plunger pump is working, the positive and negative pressure changes in the pipeline will cause the membrane layer to bulge and dent repeatedly, which also presents dynamic changes. This reduces the adhesion of the coating to a certain extent and can reduce the risk of blockage in hard-to-clean areas.

[0017] 3. When the valve ball is open, it makes minimal contact with the support end, allowing the coating to flow fully along the outer wall and side cavity of the valve ball, creating a scouring effect on the valve ball surface and further reducing coating adhesion. In addition, the check valve and the cleaning component are set independently. When disassembling, only the limit end needs to be unscrewed to pour out the check valve and the cleaning component as a whole for cleaning or replacement. It can also be replaced with a conventional check valve according to the actual situation. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the body of the present invention; Figure 3 This is a schematic diagram of the half-section structure of the internal metal component of the present invention; Figure 4 This is a schematic diagram of the internal metal component structure of the present invention; Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure of part A in the diagram; Figure 6 This is a half-sectional schematic diagram of the one-way valve and cleaning component of the present invention; Figure 7 This is a partially exploded structural diagram of the one-way valve and cleaning component of the present invention; Figure 8 For the present invention Figure 7 A magnified schematic diagram of the partial structure of B in the diagram; Figure 9 This is a schematic diagram of a partial structure of the cleaning component of the present invention.

[0020] In the diagram: 1. Machine body; 2. Motor; 3. Cylinder; 4. Drive component; 41. Output shaft; 42. Disc; 43. Rotating shaft; 44. Bearing; 45. Hinge shaft; 46. Pump chamber; 47. Piston shaft; 5. Inner metal parts; 51. Chamber 1; 52. Chamber 2; 53. Chamber 3; 54. Chamber 4; 55. Limiting end; 6. Inlet; 7. Outlet; 8. Check valve; 81. Valve seat; 82. Sealing cover; 83. Sealing layer; 831. Gap; 832. Connecting hole; 84. Side cavity; 85. Support end; 86. Valve ball; 87. Support spring; 9. Cleaning component; 91. Pipe section; 92. Ring; 93. Membrane layer. Detailed Implementation

[0021] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0022] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0023] This embodiment mainly describes a wall spraying machine that can prevent clogging. Please refer to [link / reference]. Figures 1-9 Specifically, the following is a description of a plunger-type spraying machine: The core working principle of the plunger pump is to draw in and expel paint through the reciprocating motion of the plunger in conjunction with the one-way valve 8. The valve chamber of the one-way valve 8 and the pipe hole connected to the one-way valve 8 are relatively easy to clog and difficult to clean. Based on this, a wall spraying machine that can prevent clogging is proposed, including a machine body 1, a motor 2 and a material cylinder 3 installed on the machine body 1, an inner metal part 5 installed inside the machine body 1, and a piston movement drive component 4 between the inner metal part 5 and the motor 2. The inner metal part 5 has longitudinally arranged and interconnected cavities 1 51 and 2 52, as well as transversely arranged and interconnected cavities 3 53 and 4 54. Cavities 1 51, 2 52, 3 53 and 4 54 are all chambers for the movement of paint. One-way valves 8 are installed in cavities 1 51 and 3 53, and cleaning components 9 are installed in cavities 2 52 and 4 54. The one-way valve 8 includes a sealing layer 83 disposed therein, and the cleaning component 9 includes a membrane layer 93. When the coating is transferred under positive and negative pressure in the first cavity 51, the second cavity 52, the third cavity 53 and the fourth cavity 54, the sealing layer 83 and the membrane layer 93 are in a fluctuating breathing state.

[0024] Specifically, the body 1 is the main structure of the spraying machine. The motor 2 and the barrel 3 are existing structures installed on the spraying machine. The inner metal part 5 is installed inside the spraying machine. The drive component 4 moves as a piston through the action of the motor 2. The inner metal part 5 has an inlet 6 and an outlet 7. Both the inlet 6 and the outlet 7 are equipped with one-way valves 8. The piston movement of the drive component 4 realizes the intake and expulsion of paint. The inner metal part 5 has four chambers 51, 52, 53 and 54 for storing paint. Cleaning components 9 are installed in both chambers 52 and 54. The cleaning components 9 are used to cover the inner wall of the cavity of the inner metal part 5. The film layer 93 on its inner side presents an undulating arc shape under the action of positive and negative pressure. The opening and closing position of the one-way valve 8 also has an undulating sealing layer 83, realizing a certain degree of self-cleaning of the adhering paint.

[0025] like Figures 2-3 The drive component 4 includes an output shaft 41 fixed to the output end of the motor 2 and extending downward into the interior of the body 1, a disc 42 fixedly sleeved with the output shaft 41, a rotating shaft 43 fixed to the lower end of the disc 42 and eccentrically arranged, and a bearing 44 fixedly sleeved on the outside of the rotating shaft 43. The inner metal part 5 has an inwardly extending pump chamber 46 on the side facing the bearing 44. The pump chamber 46 has a piston shaft 47. The piston shaft 47 and the bearing 44 are hinged by a hinge shaft 45. The output shaft 41 rotates to drive the piston shaft 47 to perform piston movement. Pump chamber 46 is connected to transverse cavity 4 54, and cavity 2 52 is connected to cavity 4 54.

[0026] Specifically, the drive component 4 is existing technology. The motor 2 has an output shaft 41 at its output end. A disk 42 fixed on the output shaft 41 rotates with the output shaft 41. A rotating shaft 43 is eccentrically mounted at the lower end of the disk 42. The rotation of the disk 42 drives the rotating shaft 43 in a circular path. The bearing 44 on the rotating shaft 43 also rotates in a circular path. The hinge shaft 45 is hinged at both ends to the piston shaft 47 and the bearing 44, respectively, enabling the output shaft 41 to rotate and drive the piston shaft 47 to move within the pump chamber 46. It should be noted that the piston shaft 47 moving within the pump chamber 46 is existing technology. It should also be noted that the first chamber 51, the second chamber 52, the third chamber 53, the fourth chamber 54, and the pump chamber 46 are all interconnected. Changes in the cavity of the pump chamber 46 cause the paint in the first chamber 51, the second chamber 52, the third chamber 53, and the fourth chamber 54 to be sucked in or expelled.

[0027] like Figure 5 As shown, steps are formed between cavity 1 51 and cavity 2 52, as well as at the inner end of cavity 2 52. Steps are also formed between cavity 3 53 and cavity 4 54, as well as at the inner end of cavity 4 54. The diameter of cavity 1 51 is larger than that of cavity 2 52, and the diameter of cavity 3 53 is larger than that of cavity 4 54. The upper end of cavity 1 51 is the inlet 6, which is connected to the material cylinder 3. The outer side of cavity 3 53 is the outlet 7, which is used to connect to the spraying pipe. The inner ends of the one-way valves 8 in cavity 1 51 and cavity 3 53 abut against the corresponding steps, and also abut against the cleaning components 9 in cavity 2 52 and cavity 4 54 respectively. The inner ends of the cleaning components 9 in cavity 2 52 and cavity 4 54 also abut against the corresponding steps.

[0028] Specifically, the cleaning component 9, which is longitudinally and laterally locked in cavity tube 2 52 and cavity tube 4 54 respectively, has its inward end abutting against the step. The one-way valve 8, which is longitudinally and laterally locked in cavity tube 1 51 and cavity tube 3 53 respectively, has its inward end abutting against the corresponding cleaning component 9 and also against the step. Its outward end is squeezed by the limiting end 55, thus limiting both the cleaning component 9 and the one-way valve 8. When tilting, the limiting end 55 can be released to directly tilt out and replace the one-way valve 8 and the cleaning component 9. It should be noted that if the cleaning component 9 is not available, the one-way valve 8 can also be installed directly. The one-way valve 8 can be replaced with an ordinary one-way valve 8.

[0029] like Figure 5 As shown, both the upper and outer ends of the inner metal part 5 are threadedly connected to limit ends 55, and the two sets of limit ends 55 abut against the outer ends of the corresponding one-way valves 8. Specifically, by means of the threaded engagement between the two sets of limit ends 55 and the inner metal part 5, the one-way valve 8 and the cleaning component 9 can be loosened and removed for replacement with the aid of external equipment, thus improving the ease of operation. It should be noted that the inner wall of the limit end 55 has a sealing ring, which prevents the paint from leaking out from the gap during the suction and discharge of paint.

[0030] like Figures 6-8 As shown, the one-way valve 8 includes a valve seat 81. Two sets of valve seats 81 are respectively locked in the corresponding cavity 1 51 and cavity 3 53. A sealing cover 82 with a hole in the middle is detachably fixed at one end of the valve seat 81. A sealing layer 83 is disposed inside the sealing cover 82. A support end 85 is fixed inside the valve seat 81. A valve ball 86 is also provided inside the valve seat 81. When the one-way valve 8 is opened and closed, the valve ball 86 can abut against the sealing layer 83 and the support end 85 respectively. A support spring 87 for supporting the valve ball 86 is also provided inside the valve seat 81.

[0031] When the one-way valve 8 is closed, the valve ball 86 abuts against the sealing layer 83. When it is open, the valve ball 86 squeezes the support spring 87 and abuts against the support end 85, so that the coating can move along the side cavity 84 and the gap between the support ends 85, and the coating can move along the outer wall of the valve ball 86, cleaning the outer wall of the valve ball 86 to a certain extent and achieving self-cleaning.

[0032] The support end 85 has a multi-piece structure arranged in a circle, with its outer end being sharp. The support spring 87 is sleeved on the support end 85. When the sharp end of the support end 85 abuts against the valve ball 86, it can minimize the contact area and allow the moving paint to clean the outer wall of the valve ball 86 over a large area, making it less likely for the paint to stick to the outer wall of the valve ball 86.

[0033] like Figures 7-8 As shown, the sealing layer 83 is squeezed against the valve ball 86 when the one-way valve 8 is closed. The sealing layer 83 is arranged in a ring shape, and its ring edge is bonded to the sealing cover 82. There is a gap 831 between the middle position of the sealing layer 83 and the sealing cover 82. A connecting hole 832 communicating with the gap 831 is passed through the sealing cover 82.

[0034] Specifically, the sealing cap 82 has a through-hole for paint to enter and exit. The valve ball 86 opens and closes through this hole. The inner side of the sealing cap 82 is arc-shaped and can fit against the valve ball 86. The sealing layer 83 on the arc-shaped surface of the sealing cap 82 is used to achieve a kneading and hard contact when the valve ball 86 is closed, improving the sealing effect. The connecting hole 832 is designed to connect the inner end of the connecting hole 832 to the gap 831. When the valve ball 86 is closed, the sealing layer 83 fits against the sealing cap 82. When the valve ball 86 is opened, the valve ball 86 separates from the sealing layer 83. Therefore, under the pressure of the paint at the outer end of the connecting hole 832, the paint enters into the gap 831, causing the sealing layer 83 to bulge outward. During the opening and closing of the valve ball 86, the sealing layer 83 bulges and is compressed, thus producing a certain degree of self-cleaning effect. Especially in the case of water cleaning, the undulating movement easily removes the adhering paint.

[0035] The outer wall of the valve ball 86 contacts the inner wall of the valve seat 81. The inner wall of the valve seat 81 near the support end 85 has a side cavity 84 for the passage of paint. When the valve ball 86 compresses the support spring 87, the paint can pass through the side cavity 84. Only a small range of movement of the valve ball 86 is required, so the sensitivity is relatively high.

[0036] like Figure 7 and Figure 9 As shown, the cleaning component 9 includes a pipe section 91. Two sets of pipe sections 91 are respectively installed in their respective cavity tubes 52 and 54. The inner wall of the pipe section 91 has an integral ring 92 arranged along the axis of the pipe section 91. The membrane layer 93 is adhered to the inner side of the arranged ring 92. The membrane layer 93 and the pipe section 91 form a series of annularly arranged chambers. Under positive and negative pressure, the membrane layer 93 can bulge outward or be recessed inward.

[0037] Specifically, the cleaning component 9 can be removed by rotating the limiting end 55 apart. The second cavity 52 and the fourth cavity 54 are part of the piston pump. When the piston shaft 47 moves, positive or negative pressure is generated, which affects the chamber between the membrane layer 93 and the tube section 91. As a result, the membrane layer 93 bulges outward or is concave inward. Each time the piston shaft 47 moves, the membrane layer 93 can produce an undulating breathing effect, maintain the self-cleaning effect, and avoid being blocked.

[0038] Both the sealing layer 83 and the membrane layer 93 are made of rubber. Since both the sealing layer 83 and the membrane layer 93 are used for undulating settings, they need a certain degree of elasticity. The contact between the sealing layer 83 and the valve ball 86 is a combination of kneading and hardening, which can achieve better sealing. It should be noted that in practice, operators can remove the one-way valve 8 and the cleaning component 9 and directly replace them with a regular one-way valve 8. At the same time, the rubber material of the sealing layer 83 and the membrane layer 93 can also be replaced with a material with better performance.

[0039] Working principle: When motor 2 is working, output shaft 41 and disc 42 both rotate, and rotating shaft 43 rotates in the circumferential direction. The piston shaft 47 moves through the hinge shaft 45. The space of pump chamber 46 changes with the piston movement. Due to the action of two one-way valves 8, the wall spraying machine sprays the paint located in the material cylinder 3. The one-way valve 8 connected to the material cylinder 3 has its sealing cover 82 facing outward, and the one-way valve 8 connected to the outlet 7 has its sealing cover 82 facing inward. When piston shaft 47 moves outward along pump chamber 46, the longitudinal one-way valve 8 opens and the transverse one-way valve 8 closes. When piston shaft 47 moves inward along pump chamber 46, the longitudinal one-way valve 8 closes and the transverse one-way valve 8 opens. It should be noted that the above description is all prior art.

[0040] It is important to understand that when the piston shaft 47 moves outward along the pump chamber 46, the spaces between chamber 1 51, chamber 2 52, chamber 3 53, and chamber 4 54 are all under negative pressure. When the piston shaft 47 moves inward along the pump chamber 46, these spaces are under positive pressure. Under negative pressure, the valve ball 86 of the longitudinal check valve 8 is drawn inward, compressing the corresponding support spring 87. Under positive pressure, the valve ball 86 of the transverse check valve 8 is pushed outward, compressing the corresponding support spring 87. During these two processes, the valve ball 86 is compressed or separated from the sealing layer 83, which can easily cause difficult-to-clean coating to adhere to the compression point. This coating can eventually solidify into particles, affecting the seal. Through the connection hole 832, when the valve ball 86 separates from the sealing layer 83, the gap 831 of the sealing layer 83 in the longitudinal one-way valve 8 is filled with paint and a certain pressure is generated, thus causing the longitudinal sealing layer 83 to bulge out. The sealing layer 83 of the transverse one-way valve 8 is also filled with paint and a certain pressure is generated, causing the transverse sealing layer 83 to bulge out. Therefore, when the piston moves, the sealing layer 83 presents an undulating breathing state, which can self-clean the adhering paint and prevent the paint from hardening into flakes or particles. Even if it is hardened into flakes or particles, it is easy to clean by self-cleaning.

[0041] It should be noted that the size of the connection hole 832 can be changed according to the actual situation. Although the paint in the gap 831 will also be squeezed when the valve ball 86 is closed, the paint can be automatically cleaned due to the undulating movement of the sealing layer 83 and the cleaning with water. Under the breathing and undulating of the sealing layer 83, self-cleaning can be achieved each time. Therefore, even if the gap 831 contains paint during the spraying process, it is not easy for the paint to adhere.

[0042] Secondly, the sealing cover 82 is designed to be replaceable. In specific situations, it can be replaced with a regular sealing cover 82 that does not have a sealing layer 83 or a gap 831. At the same time, the limiting end 55 is connected by a thread, which makes it easy to remove it later. When the limiting end 55 is removed, the internal one-way valve 8 and cleaning component 9 can be directly emptied out for maintenance or replacement.

[0043] It should also be noted that when the coating passes through the one-way valve 8, the valve ball 86 compresses the support spring 87 and the valve ball 86 abuts against the support end 85. The coating moves from the gap between the side cavity 84 and the support end 85, that is, it moves along the outer wall of the valve ball 86, so as to self-clean the outer wall of the valve ball 86 as much as possible.

[0044] It should be noted that when the positive and negative pressures change within cavities 51, 52, 53, and 54, the cleaning components 9 form individual chambers. Under the influence of these positive and negative pressures, the membrane layer 93 bulges outward or concave inward, thus achieving a self-cleaning effect. In hard-to-clean areas, the coating is less likely to adhere. It should also be noted that because cavities 51, 52, 53, and 54 have steps, it is convenient to remove and place the cleaning components 9. Since the rubber material is prone to aging after prolonged use, this component needs to be easy to replace.

[0045] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0046] The above provides a detailed description of the anti-clogging wall spraying machine provided by the present invention. Specific examples have been used to illustrate the principle and implementation of the present invention. The above description of the embodiments is only for the purpose of helping to understand the present invention and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A clog-resistant wall spraying machine, comprising a machine body, a motor mounted on the machine body, and a spray cylinder, characterized in that, The machine body contains an internal metal component, and there is a piston-movement drive component between the internal metal component and the motor; The inner metal part has longitudinally arranged and interconnected cavities one and two, as well as transversely arranged and interconnected cavities three and four. Cavities one, two, three and four are all chambers for the movement of paint. One-way valves are installed in cavities one and three, and cleaning components are installed in cavities two and four. The one-way valve includes a sealing layer disposed therein, and the cleaning component includes a membrane layer. When the coating is transferred under positive and negative pressure in the first, second, third and fourth cavities, the sealing layer and the membrane layer are in a breathing state with fluctuations. The one-way valve includes a valve seat, with two sets of valve seats respectively locked in the corresponding cavity one and cavity three. A sealing cover with a hole in the middle is detachably fixed at one end of the valve seat. The sealing layer is set inside the sealing cover. A support end is fixed inside the valve seat. A valve ball is also provided inside the valve seat. When the one-way valve is opened and closed, the valve ball can abut against the sealing layer and the support end respectively. A support spring for supporting the valve ball is also provided inside the valve seat. When the check valve is closed, the sealing layer is squeezed against the valve ball. The sealing layer is arranged in a ring shape, and its annular edge is bonded to the sealing cover. There is a gap between the middle position of the sealing layer and the sealing cover. A connecting hole communicating with the gap is passed through the sealing cover. The cleaning component includes pipe sections, with two sets of pipe sections respectively installed in their respective cavity two and cavity four. The inner wall of the pipe section has rings arranged along the axis of the pipe section. The membrane layer adheres to the inner side of the arranged rings, forming a series of annular chambers between the membrane layer and the pipe section. Under positive and negative pressure, the membrane layer can bulge outward or inward.

2. The anti-clogging wall spraying machine according to claim 1, characterized in that, The drive component includes an output shaft fixed to the motor output end and extending downward into the machine body, a disc body fixedly sleeved with the output shaft, a rotating shaft fixed to the lower end of the disc body and eccentrically arranged, and a bearing fixedly sleeved on the outside of the rotating shaft. The inner metal part has an inwardly extending pump chamber on the side facing the bearing. The pump chamber contains a piston shaft, and the piston shaft is hinged to the bearing. The output shaft rotates to drive the piston shaft to perform piston movement. The pump chamber is connected to the transverse chamber four, and the chamber two is connected to the chamber four.

3. The anti-clogging wall spraying machine according to claim 1, characterized in that, Steps are formed between cavity one and cavity two, as well as at the inner end of cavity two. Steps are also formed between cavity three and cavity four, as well as at the inner end of cavity four. The diameter of cavity one is larger than that of cavity two, and the diameter of cavity three is larger than that of cavity four. The upper end of cavity one is the inlet that is connected to the barrel. The outer side of cavity three is the outlet that is used to connect to the spraying pipe. The inner ends of the one-way valves in cavities one and three abut against the corresponding steps, and also abut against the cleaning components in cavities two and four respectively. The inner ends of the cleaning components in cavities two and four also abut against the corresponding steps.

4. The anti-clogging wall spraying machine according to claim 3, characterized in that, The upper and outer ends of the inner metal part are threaded to limit ends, and the two sets of limit ends abut against the outer ends of the corresponding one-way valves.

5. The anti-clogging wall spraying machine according to claim 1, characterized in that, The support end has a multi-piece structure arranged in a circle, with sharp outer ends, and the support spring is sleeved on the support end.

6. The anti-clogging wall spraying machine according to claim 1, characterized in that, The outer wall of the valve ball contacts the inner wall of the valve seat. A side cavity is opened on the inner wall of the valve seat near the support end, which is used for the passage of coating.

7. The anti-clogging wall spraying machine according to claim 1, characterized in that, Both the sealing layer and the membrane layer are made of rubber.

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