Pressure stabilizing assembly and airless spraying equipment thereof

Abstract

The utility model discloses a pressure stabilizing assembly and airless spraying equipment thereof. The pressure stabilizing assembly of the airless spraying equipment comprises a shell, an elastic element and a valve element assembly. The shell is provided with an inlet and an inner cavity, and the inlet communicates with the inner cavity; the elastic element is fixed in the inner cavity and divides the inner cavity into a first chamber and a second chamber which are sealed with each other, and the first chamber is close to the inlet; the valve element assembly abuts against the elastic element and is used for closing or opening the inlet. According to the utility model, the spraying pressure of the airless spraying equipment is more stable, and the structure is simple and compact.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to airless spraying equipment. Background Art

[0002] Airless spraying relies on a pump to apply high pressure to the paint, so that the paint is sprayed out from the spraying component under high pressure and atomized, without the need for compressed air atomization. Most existing high-pressure airless spraying equipment uses reciprocating pumps (such as plunger pumps, diaphragm pumps, etc.) to form high pressure. The reciprocating motion will cause pulsating supply of the spray liquid, resulting in uneven injection pressure and flow, reduced particle fineness and uniformity during the atomization process, and reduced density and adhesion after coverage, which reduces the spraying quality. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a pressure stabilizing component and an airless spraying device thereof, which can make the spraying pressure of the airless spraying device more stable and have a simple and compact structure.

[0004] According to the first aspect of the utility model, a pressure-stabilizing assembly of an airless spraying device is provided, comprising a shell, an elastic element and a valve core assembly; the shell has an inlet and an inner cavity, and the inlet is connected to the inner cavity; the elastic element is fixed in the inner cavity, dividing the inner cavity into a first chamber and a second chamber sealed from each other, and the first chamber is close to the inlet; the valve core assembly abuts the elastic element to close or open the inlet.

[0005] According to the second aspect of the utility model, an airless spraying device is provided, comprising a casing, a reciprocating pump and a liquid spraying component, the casing being provided with a liquid outlet channel, the inlet end of the liquid outlet channel being connected to the outlet of the reciprocating pump, and the outlet end of the liquid outlet channel being connected to the liquid spraying component; wherein the airless spraying device also comprises the above-mentioned voltage stabilizing component; the casing being provided with an interface, the interface being connected to the shell of the voltage stabilizing component, and the interface being respectively connected to the liquid outlet channel and the shell inlet of the voltage stabilizing component; the valve core component of the voltage stabilizing component can overcome the elastic force of the elastic element under the action of the liquid pressure flowing into the inlet, open the inlet, and allow the liquid to flow into the first chamber, and when the elastic force applied by the elastic element to the valve core component is greater than the liquid pressure in the inlet, the valve core component is reset by the elastic element, so that the liquid in the first chamber flows to the liquid spraying component through the inlet, the interface and the liquid outlet channel in sequence.

[0006] The utility model has at least the following advantages:

[0007] 1. The voltage stabilizing component of the embodiment of the utility model has the function of stabilizing the spraying pressure of the airless spray equipment. When the reciprocating pump is in the second half of the cycle and the airless spray equipment increases the paint to a high pressure and transports it to the spray component through the liquid outlet channel of the equipment, the liquid in the liquid outlet channel will flow into the inlet of the voltage stabilizing component and push the valve core component to overcome the elastic force of the elastic element and move toward the inner cavity of the shell, thereby opening the inlet and allowing the liquid to enter the first chamber of the shell. When the reciprocating pump is in the first half of the cycle and the airless spray equipment only takes in liquid but does not spray, the elastic element pushes the valve core component to reset and reclose the inlet. During this period, the liquid in the first chamber flows to the spray component through the inlet, the interface and the liquid outlet channel in turn. In this way, the injection pressure and flow rate of the airless spray equipment are more balanced, and the density and adhesion of the spray liquid after covering are improved, thereby achieving better spraying and spraying effects;

[0008] 2. The voltage stabilizing assembly of the embodiment of the utility model has a simple and compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figures 1 to 3 The three-dimensional schematic diagram, explosion schematic diagram and cross-sectional schematic diagram of a voltage stabilizing assembly of an airless spraying device according to an embodiment of the utility model are respectively shown.

[0010] Figure 4 A cross-sectional schematic diagram of a high-pressure airless sprayer equipped with a voltage stabilizing assembly according to an embodiment of the utility model is shown.

[0011] Figure 5 A cross-sectional schematic diagram of a high-pressure airless spray gun equipped with a pressure stabilizing assembly according to an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0012] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] Figures 1 to 3 The structure of the voltage stabilizing assembly of the airless spraying equipment according to one embodiment of the utility model is shown. Figures 1 to 3 The pressure stabilizing assembly of the airless spraying equipment according to one embodiment of the utility model comprises a housing 1 , an elastic element 2 , a valve core assembly 3 and a guide sleeve 4 .

[0014] The housing 1 has an inlet 11 and an inner cavity 12, and the inlet 11 is connected to the inner cavity 12. The elastic element 2 is fixed in the inner cavity 12, and the inner cavity 12 is divided into a first chamber 121 and a second chamber 122 that are sealed from each other, and the first chamber 121 is close to the inlet. The top of the valve core assembly 3 extends into the inlet 11, and the bottom end of the valve core assembly 3 abuts the elastic element 2. The valve core assembly 3 is used to close or open the inlet 11.

[0015] In this embodiment, the housing 1 includes an upper shell 1a and a lower shell 1b, wherein the upper shell 1a is detachably connected to the lower shell 1b and defines an inner cavity 12 together. The upper shell 1a includes a narrow neck 13 and a wide body 14, wherein the bottom end of the neck 13 is connected to the top of the body 14, and the central through hole of the neck 13 constitutes the aforementioned inlet 11. The outer side surface of the bottom of the body 14 is provided with an outer thread 141. The inner side surface of the top of the lower shell 1b is provided with an inner thread 151 matching the outer thread 141, and the bottom of the upper shell 1a extends into the lower shell 1b and is spirally connected to the lower shell 1b. A step 153 is also provided on the inner side surface of the lower shell 1b.

[0016] The guide sleeve 4 is arranged in the inlet 11 of the housing 1. Specifically, the guide sleeve 4 is in the shape of a hollow cylinder, and the top of the guide sleeve 4 has a circle of annular flange 41 extending radially, the guide sleeve 4 extends into the inlet 11 of the housing 1, and the annular flange 41 presses on the top surface of the housing 1. The top of the valve core assembly 3 extends into the guide sleeve 4.

[0017] The elastic element 2 is made of non-metallic material, such as rubber. The elastic element 2 includes a top wall 21 and a side wall portion 22 extending downward from the periphery of the top wall 21. The bottom end of the side wall portion 22 is provided with an annular flange 23 extending radially outward. The annular flange 23 is sandwiched between the bottom of the upper shell 1a and the step 153 on the top of the lower shell 1b.

[0018] The valve core assembly 3 includes a valve core 31 and a spring 32. The valve core 31 includes a valve stem 311 and a valve disc 312. The upper part of the valve stem 311 extends into the inlet 11. The spring 32 is sleeved outside the stem of the valve stem 311. The top of the valve stem 311 has a spring stopper 313 protruding radially outward. The bottom of the valve stem 311 is connected to the valve disc 312. The valve disc 312 abuts against the elastic element 2 to close or open the inlet 11. Preferably, a first conical surface 314 is provided on the top of the valve disc 312, and a second conical surface 124 is provided at the inner cavity 12 adjacent to the inlet 11 to form a sealing fit with the first conical surface 314.

[0019] In this embodiment, the second chamber 122 is an inflatable chamber. Optionally, the second chamber 122 is filled with nitrogen. The inner wall of the second chamber 122 is provided with an inflatable through hole 123, and a sealing element is provided in the inflatable through hole 123, and the sealing element is detachably connected to the housing 1. Specifically, the inflatable through hole 123 is a threaded through hole; the sealing element includes a screw 53 and a sealing ring 54, the screw 53 is spirally connected to the threaded through hole 123, and the sealing ring 54 is sleeved outside the screw 53 to block the gap between the screw 53 and the threaded through hole 123. Optionally, the screw 53 is a self-tapping screw. In actual work, the initial shape of the elastic element 2 is similar to a sheet. After the product is assembled, nitrogen is poured into the second chamber 122 from the inflatable through hole 123, and then the screw 53 is tightened, and the sealing is achieved by the screw 53 and the sealing ring 54. After the nitrogen is poured in, the elastic element 2 will be propped up, and then the valve core assembly 3 will be lifted up.

[0020] In actual application, the aforementioned voltage stabilizing assembly is installed in an airless spraying device. The airless spraying device includes a housing, a reciprocating pump and a liquid spraying component. The housing is provided with a liquid outlet channel, the inlet end of the liquid outlet channel is connected to the outlet of the reciprocating pump, and the outlet end of the liquid outlet channel is connected to the liquid spraying component. The housing is provided with an interface, which is connected to the housing of the voltage stabilizing assembly, and the interface is respectively connected to the liquid outlet channel and the housing inlet of the voltage stabilizing assembly.

[0021] The aforementioned reciprocating pump is a plunger pump, a piston pump or a diaphragm pump. In each reciprocating motion cycle (i.e., a cycle) of the reciprocating pump, liquid is introduced but no spraying is performed in the first half of the cycle, and spraying is performed but no liquid is introduced in the second half of the cycle, and this cycle repeats. Since no spraying is performed in half of each cycle, the injection pressure and flow rate are unbalanced, and the spraying efficiency is low. After the pressure stabilizing assembly is installed, when the reciprocating pump is in the second half of the cycle and the airless spray equipment increases the paint to a high pressure and transports it to the spray component through the liquid outlet channel of the equipment, the valve core assembly 3 of the pressure stabilizing assembly overcomes the elastic force of the elastic element 2 under the action of the liquid pressure flowing into the inlet 11, opens the inlet 11, and allows the liquid to flow into the first chamber 121. When the reciprocating pump is in the first half of the cycle and the airless spray equipment only takes in liquid but does not spray, the elastic force applied by the elastic element 2 to the valve core assembly 3 is greater than the liquid pressure in the inlet 11, and the valve core assembly 3 is reset by the elastic element 2, so that the liquid in the first chamber 121 flows to the spray component through the inlet 11, the interface and the liquid outlet channel in sequence.

[0022] In a specific embodiment, the aforementioned airless spraying equipment is a high-pressure airless spraying machine 600, and the liquid spraying component is a spray gun 601, such as Figure 4The housing 602 of the high-pressure airless sprayer 600 is provided with an interface 603, and the interface 603 is provided with an internal thread 604 adapted to the external thread 134 of the housing top of the voltage stabilizing component, and the housing top of the voltage stabilizing component is spirally connected to the interface 603. The interface 603 is respectively connected to the liquid outlet channel 605 of the high-pressure airless sprayer 600 and the housing inlet 11 of the voltage stabilizing component. Figure 4 A plunger pump 606 of the high pressure airless sprayer 600 is also shown.

[0023] In another specific embodiment, the aforementioned airless spraying equipment is a high-pressure airless spray gun 700, and the liquid spraying component is a nozzle 701, such as Figure 5 As shown. The housing 702 of the high-pressure airless spray gun 700 is provided with an interface 703, and the interface 703 is provided with an internal thread 704 adapted to the external thread 134 of the housing top of the voltage stabilizing component, and the housing top of the voltage stabilizing component is spirally connected to the interface 703. The interface 703 is respectively connected to the liquid outlet channel 705 of the high-pressure airless spray gun 700 and the housing inlet 11 of the voltage stabilizing component. Figure 5 A plunger pump 706 of the high pressure airless spray gun 700 is also shown.

[0024] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A voltage stabilizing component for airless spraying equipment, characterized in that: It includes a housing, an elastic element and a valve core assembly; The shell has an inlet and an inner cavity, the inlet is connected to the inner cavity; the elastic element is fixed in the inner cavity to separate the inner cavity into a first chamber and a second chamber that are sealed from each other, and the first chamber is close to the inlet; the valve core assembly abuts the elastic element to close or open the inlet.

2. The voltage stabilizing assembly according to claim 1, characterized in that: The second chamber is a gas-filled chamber.

3. The voltage stabilizing assembly according to claim 2, characterized in that: The second chamber is filled with nitrogen.

4. The voltage stabilizing assembly according to claim 2, characterized in that: An air-filling through hole is formed on the inner wall of the second chamber. A sealing element is disposed in the air-filling through hole. The sealing element is detachably connected to the shell.

5. The voltage stabilizing assembly according to claim 4, characterized in that: The inflation through hole is a threaded through hole; the sealing element includes a screw and a sealing ring, the screw is spirally connected to the threaded through hole, and the sealing ring is sleeved outside the screw to seal the gap between the screw and the threaded through hole.

6. The voltage stabilizing assembly according to any one of claims 1 to 5, characterized in that: The housing comprises an upper shell and a lower shell, wherein the upper shell and the lower shell are detachably connected and together define the inner cavity; The upper shell comprises a narrow neck and a wide body, the bottom end of the neck is connected to the top of the body, and the central through hole of the neck constitutes the inlet.

7. The voltage stabilizing assembly according to claim 6, characterized in that: The elastic element is made of non-metallic material, and includes a top wall and a side wall portion extending downward from the periphery of the top wall. The bottom end of the side wall portion is provided with an annular flange extending radially outward, and the annular flange is clamped between the bottom of the upper shell and the top of the lower shell.

8. The voltage stabilizing assembly according to claim 1, characterized in that: The valve core assembly includes a valve core and a spring; the valve core includes a valve stem and a valve disc, the upper part of the valve stem extends into the inlet, the spring is sleeved outside the stem body of the valve stem, the top end of the valve stem has a spring stopper protruding radially outward, and the bottom end of the valve stem is connected to the valve disc; the valve disc abuts against the elastic element to close or open the inlet.

9. The voltage stabilizing assembly according to claim 8, characterized in that: A first conical surface is provided on the top of the valve disc, and a second conical surface is provided at the inner cavity adjacent to the inlet to form a sealing fit with the first conical surface.

10. The voltage stabilizing assembly according to claim 1, characterized in that: The pressure stabilizing assembly comprises a guide sleeve, which is arranged in the inlet of the shell, and the top of the valve core assembly extends into the guide sleeve.

11. An airless spraying device, comprising a housing, a reciprocating pump and a liquid spraying component, wherein the housing is provided with a liquid outlet channel, the inlet end of the liquid outlet channel is connected to the outlet of the reciprocating pump, and the outlet end of the liquid outlet channel is connected to the liquid spraying component; characterized in that: The airless spraying equipment further comprises a voltage stabilizing assembly as claimed in any one of claims 1 to 10; The housing is provided with an interface, the interface is connected to the housing of the voltage stabilizing component, and the interface is communicated with the liquid outlet channel and the housing inlet of the voltage stabilizing component respectively; The valve core assembly of the pressure-stabilizing assembly can overcome the elastic force of the elastic element under the action of the liquid pressure flowing into the inlet, open the inlet, and allow the liquid to flow into the first chamber. When the elastic force applied by the elastic element to the valve core assembly is greater than the liquid pressure in the inlet, the valve core assembly is reset by the elastic element, so that the liquid in the first chamber flows to the liquid spraying component through the inlet, the interface and the liquid outlet channel in sequence.

12. The airless spraying equipment according to claim 11, characterized in that The top end of the shell of the voltage stabilizing component is screw-connected to the interface.

13. The airless spraying equipment according to claim 11, characterized in that The reciprocating pump is a plunger pump, a piston pump or a diaphragm pump.

14. The airless spraying equipment according to claim 11, characterized in that The airless spraying equipment is a high-pressure airless spraying machine, and the liquid spraying component is a spray gun.

15. The airless spraying equipment according to claim 11, characterized in that The airless spraying equipment is a high-pressure airless spray gun, and the liquid spraying component is a nozzle.

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