TW201617138A - Spraying device and switching method thereof - Google Patents

Abstract

A spraying device and switching method thereof are disclosed. The spraying device includes a switching valve, a spray loop, a spraying unit, a reflux loop and a reflux tank. The switching valve has a switching mechanism, an accommodating space and a spray outlet and a reflux outlet communicating with the accommodating space. The switching mechanism is rotatably provided in the accommodating space. The switching mechanism has a shielding zone, and a discharging zone, wherein the switching valve is switched, the extent of the shielding zone shielding the spray outlet or the reflux outlet will equal to the discharging zone opening to the spray outlet or the reflux outlet. Thereby a spray device with continuous supplying and stable pressure is achieved.

Description

Spraying device and spraying switching method thereof 【0001】

The invention relates to a spraying device, in particular to a spraying device and a spraying switching method for a spraying device.

【0002】

During the processing of the surface of the painted article, it is necessary to select the appropriate spraying method and equipment to achieve the desired spraying effect. In the current spraying equipment, the spraying control uses the components such as the pump and the valve to control the spraying amount of the spraying unit.

[0003]

As shown in Fig. 1, a schematic view of a spraying apparatus is shown. The spraying apparatus 1' includes a switching valve 10' and a spraying unit 20'. The switching valve 10' has a paint inlet 11', a switch 12', a paint outlet 13' that communicates with the paint inlet 11', and a paint recovery port 14'. The switching valve 10' is used in a manner that controls the supply of paint by selectively opening or closing the paint outlet 13' by the switch 12'. When the switch 12' is blocked at the inlet of the paint outlet 13', the paint will flow into the paint recovery port 14' for recovery. On the other hand, when the switch 12' is blocked at the paint recovery port 14', the paint flows into the paint inlet 11' and is sprayed onto the object to be sprayed 2' through the spray unit 20'.

[0004]

In the process of using the switching valve 10', the switch 12' is switched between the paint outlet 13' and the paint recovery port 14' to control the amount of spray of the spray unit. However, when the switch 12' just stays between the two, there is a case where both sides are not fed and the paint is discontinuous. In addition, under the rapid cycle switching, there is often a problem of pressure instability, resulting in uneven spraying and reducing the yield of the product.

[0005]

In view of the above, the present inventors have made great efforts to improve and solve the above-mentioned shortcomings, and have finally made a proposal to rationally and effectively improve the above-mentioned defects.

[0006]

An object of the present invention is to provide a spraying device and a spraying switching method thereof, which provide continuous feeding and stable pressure by the setting of the switching valve, thereby achieving the purpose of uniform spraying and improving the yield of the product.

【0007】

In order to achieve the above object, the present invention is a spraying apparatus including a switching valve, a spraying circuit, a spraying unit, a return circuit, and a return tank. The switching valve includes a switching mechanism, a accommodating space, and a spray outlet and a return outlet that communicate with the accommodating space. The switching mechanism is rotatably disposed in the accommodating space, and the switching mechanism has a shielding area and a discharging area; wherein the shielding area shields one of the spraying outlet and the returning outlet from being shielded to be equal to the discharging area corresponding to the spraying outlet and the returning outlet The degree of opening of one. The spray circuit is connected to the spray outlet. The spray unit is connected to the other end of the spray circuit with respect to the spray outlet. The return circuit is connected to the return outlet. The reflux tank is connected to the other end of the return circuit with respect to the return outlet.

[0008]

In order to achieve the above object, the present invention is a spraying switching method of a spraying device, comprising: a) providing a switching valve, the switching valve comprising a switching mechanism, an accommodating space, and a spraying outlet and a returning outlet connecting the accommodating spaces, and the switching mechanism is Rotatingly disposed in the accommodating space and having a shielding area and a discharging area; and b) switching the switching valve, wherein the shielding area shields one of the spray outlet and the return outlet from being equal to the discharge area corresponding to the spray outlet and the return flow The degree of opening of the other of the exports.

【0009】

Compared with the prior art, the switching valve of the present invention is provided with a rotatable switching mechanism in the accommodating space, and the switching mechanism has a shielding area and a discharging area, and the switching mechanism generates rotation when subjected to an external force. The shielding area and the discharging area of the switching mechanism are correspondingly arranged with the spraying outlet and the returning outlet, and the rotation of the switching mechanism causes the shielding area to shield one of the spraying outlet and the return outlet to be equal to the corresponding spraying outlet and the return outlet of the discharging area. The degree of opening of the other. Accordingly, the spray outlet and the return outlet do not undergo a simultaneous closed state or a simultaneous open state, so that the working fluid in the switching valve accommodation space can be maintained at a certain pressure and stably supply a working fluid (such as paint, etc.). Thereby, the yield of the product in the process is improved, and the practicability and convenience of the invention are increased.

[0036]

1, 1'‧‧‧ spraying device

[0037]

2’‧‧‧ Items to be sprayed

[0038]

10', 10, 10a, 10b‧‧‧ switching valves

[0039]

11’‧‧‧ Paint entrance

[0040]

12’‧‧‧Switch

[0041]

13’‧‧‧ Paint exports

[0042]

14'‧‧‧ paint recovery port

[0043]

20’‧‧· Spraying unit

[0044]

11, 11a, 11b‧‧‧ spray export

[0045]

12, 12a, 12b‧‧‧ return outlet

[0046]

13‧‧‧Feed tube

[0047]

100‧‧‧ accommodating space

[0048]

20‧‧‧Switching mechanism

[0049]

21‧‧‧ shaft

[0050]

22‧‧‧column

[0051]

23‧‧ ‧ blocking wall

[0052]

201, 201a, 201b‧‧‧ shaded area

[0053]

202, 202a, 202b‧‧‧ discharge area

[0054]

30‧‧‧ Spraying circuit

[0055]

40‧‧‧ Spraying unit

[0056]

50‧‧‧Return loop

[0057]

60‧‧‧Reflow tank

[0058]

A, M, N‧‧‧ opening angle

[0059]

a, m, n‧‧‧ angle

[0010]

Figure 1 is a schematic view of a conventional spraying device;

[0011]

2 is a schematic perspective view of a switching valve of the present invention;

[0012]

Figure 3 is a sectional view showing the combination of the switching valve of the present invention;

[0013]

Figure 4 is a schematic view showing the use of the switching valve of the present invention;

[0014]

Figure 5 is a schematic view showing the use of the switching valve of the present invention;

[0015]

Figure 6 is another embodiment of the switching valve of the present invention;

[0016]

Figure 7 is still another embodiment of the switching valve of the present invention;

[0017]

Figure 8 is a schematic view showing the arrangement of the spraying device of the present invention;

[0018]

Figure 9 is a schematic view showing another arrangement of the spraying apparatus of the present invention.

[0019]

The detailed description and technical content of the present invention are set forth in the accompanying drawings.

[0020]

2 and 3 are schematic perspective views and a combined cross-sectional view of the switching valve of the present invention. The switching valve 10 of the present invention is used to connect a pump (not shown) and provide a working fluid (such as paint, etc.). The switching valve 10 includes a switching mechanism 20, an accommodating space 100, and a spray outlet 11 and a return outlet 12 that communicate with the accommodating space 100.

[0021]

The switching valve 10, preferably made of metal. The switching valve 10 has a switching mechanism 20, an accommodating space 100, and a spray outlet 11 and a return outlet 12 that communicate with the accommodating space 100. The switching mechanism 20 is rotatably disposed in the accommodation space 100. The switching mechanism 20 has a shielding area 201 and a discharge area 202. It should be noted that the shielding level of the shielding area 201 shielding one of the spray outlet 11 and the return outlet 12 is equal to the opening degree of the discharge area 202 corresponding to the other of the spray outlet 11 and the return outlet 12.

[0022]

In more detail, the switching valve 10 is provided with a supply pipe 13 that connects the accommodating space 100. The switching mechanism 20 includes a shaft 21 and a column 22. The shaft 21 is connected to the switching mechanism 20, and the shaft 21 drives the cylinder 22 to rotate under the action of an external force. Further, the shielding area 201 may be provided as a barrier wall 23, such as a curved piece or the like. The discharge area 202 is a liquid-containing space, and the working liquid flows into the liquid-contained space from the supply pipe 13.

[0023]

In the present embodiment, the retaining wall 23 and the liquid containing space are located on the cylinder 22. Further, the spray outlet 11 and the return outlet 12 are respectively disposed on opposite sides of the switching valve 10. The discharge zone 202 has an opening angle A. The opening angle A can be set to 180 degrees, but is not limited. In addition, an angle a is formed between the spray outlet 11 and the return outlet 12, and the angle a is corresponding to the opening angle A. In this embodiment, the angle a is set to 180 degrees.

[0024]

Referring to FIG. 4 and FIG. 5 simultaneously, a schematic diagram of the use of the switching valve of the present invention is shown. When the switching valve 10 of the present invention is used, the shaft 21 drives the cylinder 22 and the retaining wall 23 to rotate under the action of an external force. The position of the shadowing zone 201 and the discharge zone 202 relative to the spray outlet 11 and the return outlet 12 is varied as the retaining wall 23 rotates. That is, when the masking area 201 (the retaining wall 23) begins to shield one of the spray outlet 11 or the return outlet 12, the discharge zone 202 opens the other of the spray outlet 11 or the return outlet 12 to the same extent.

[0025]

As shown in FIG. 4, when the shielding area 201 (the retaining wall 23) rotates in the liquid containing space 100 and shields the spray outlet 11, the discharge area 202 is opened correspondingly toward the return outlet 12, and at this time, the working fluid flows into the return flow. Exit 12. Referring to FIG. 5 again, on the other hand, when the shielding area 201 (the retaining wall 23) rotates in the liquid containing space 100 and shields the return outlet 12, at the same time, the discharging area 202 is opened corresponding to the spraying outlet 11, which At this time, the working fluid flows into the spray outlet 11 and the spraying operation is performed accordingly.

[0026]

The shielding valve 10 of the present invention shields one of the spray outlet 11 and the return outlet 12 through the shielding area 201 to a degree equal to the opening degree of the discharge area 202 corresponding to the other of the spray outlet 11 and the return outlet 12, thereby The pressure in the liquid space is stabilized, thereby continuously providing the working fluid.

[0027]

Referring to Figures 6 and 7, another embodiment of the switching valve of the present invention is shown. In Fig. 6 and Fig. 7, the switching valves 10a, 10b include a switching mechanism 20a, 20b, accommodating spaces 100a, 100b, a spray outlet 11a, 11b, and a return outlet 12a, 12b. The spray switching mechanisms 20a, 20b are rotatably disposed in the accommodation spaces 100a, 100b. The switching mechanisms 20a, 20b have a shielding area 201a, 201b and a discharge area 202a, 202b. The discharge zone 202a has an opening angle M, and the discharge zone 202b has an opening angle N. An angle n is formed between the spray outlet 11a and the return outlet 12a, and an angle n is formed between the spray outlet 11b and the return outlet 12b.

[0028]

As shown in Fig. 6, the opening angle M of the discharge zone 202b is set to 90 degrees. Further, the angle m between the spray outlet 11a and the return outlet 12a is set to be 90 degrees. Further, in Fig. 7, the opening angle N of the discharge area 202b is set to 135 degrees. Further, the angle n between the spray outlet 11b and the return outlet 12b is correspondingly set to 135 degrees.

[0029]

Similarly, in the present embodiment, the switching valves 10a, 10b shield the one of the spray outlets 11a, 11b and the return outlets 12a, 12b through the shielding areas 201a, 201b to a degree equal to the discharge area corresponding to the spray outlets 11a, 11b and the return outlets. The setting of the degree of opening of the other of 12a, 12b, in turn, stabilizes the pressure in the liquid containing space, thereby continuously providing the working fluid.

[0030]

Please refer to FIG. 8 again, which is a schematic view showing the arrangement of the spraying device of the present invention. The present invention provides a spraying device 1 for spraying a workpiece to be sprayed. The spraying device comprises a switching valve 10, a spraying circuit 30, a spraying unit 40, a return circuit 50 and a return tank 60. The switching valve 10 includes a switching mechanism 20, and the spraying unit 40 is a sprayer or a knife (Slit) Nozzle), but not limited to this. The structure of the switching valve 10 is as described above and will not be described herein.

[0031]

One end of the spray circuit 30 is connected to the spray outlet 11. The spray unit 40 is coupled to the other end of the spray circuit 30 with respect to the spray outlet 11. One end of the return circuit 50 is connected to the return outlet 12. The return tank 60 is connected to the other end of the return circuit 50 with respect to the return outlet 12. Accordingly, when the switching valve 10 switches to block the spray outlet 11, the paint flows into the return outlet 12, and flows into the return tank 60 from the return circuit 50 to be recovered. On the other hand, when the switching valve 10 is switched to block the return outlet 12, the paint flows into the spray outlet 11 and flows from the spray circuit 30 into the spray unit 40, and sprays the object to be sprayed 2 through the spray unit 40. .

[0032]

Furthermore, the present invention further provides a spraying switching method for a spraying device, comprising: a) providing a switching valve 10, 10a, 10b, the switching valve 10, 10a, 10b comprising a switching mechanism 20, an accommodation space 100, 100a And a discharge outlet 11, 11a, 11b and a return outlet 12, 12a, 12b connected to the accommodating space 100. The switching mechanism 20 is rotatably disposed in the accommodating space 100 and has a shielding area 201, 201a. , 201b and a discharge zone 202, 202a, 202b; and b) switching the switching valves 10, 10a, 10b, wherein the shielding zones 201, 201a, 201b shield the spray outlets 11, 11a, 11b and the return outlets 12, 12a The degree of shading of one of 12b is equal to the degree of opening of the discharge zone 202, 202a, 202b corresponding to the other of the spray outlets 11, 11a, 11b and the return outlets 12, 12a, 12b.

[0033]

Referring to FIG. 9, another schematic diagram of the spraying device of the present invention is shown; the setting of the embodiment is substantially the same as that of the previous embodiment, and the difference lies in the arrangement of the feeding tube 13 of the spraying device. In the present embodiment, the supply pipe 13 is in the direction of the vertical shaft 21, and the working liquid (paint) is sprayed from the top to the bottom of the liquid storage space. However, in the previous embodiment, the supply pipe 13 is the axial direction. The direction of the rod 21 is axially arranged. In actual implementation, the direction in which the working liquid (paint) flows from the supply pipe 13 into the liquid receiving space is not limited.

[0034]

In summary, the spraying device of the present invention achieves the purpose of providing continuous paint through the switching method of the switching valves 10, 10a, 10b, preventing the occurrence of uneven spraying; in addition, due to the spraying outlets 11, 11a, 11b and the return outlet The degree of shielding of one of 12, 12a, 12b is equal to the degree of opening of the discharge zone 202, 202a, 202b corresponding to the other of the spray outlets 11, 11a, 11b and the return outlets 12, 12a, 12b, so that the switching valve 10 is transmitted through the switching valve 10 The working fluid flowing out at 10a, 10b does not cause the problem of pressure instability, thereby improving the process yield.

[0035]

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and other equivalent variations of the patent spirit of the present invention are all within the scope of the invention.

10‧‧‧Switching valve

11‧‧‧ Spray export

12‧‧‧Reflux exit

100‧‧‧ accommodating space

23‧‧ ‧ blocking wall

202‧‧‧Drawing area

A‧‧‧ opening angle

A‧‧‧ angle

Claims (10)

[Item 1] A spraying device comprising: a switching valve (10, 10a, 10b), the switching valve (10, 10a, 10b) comprising a switching mechanism (20), an accommodating space (100, 100a, 100b) and connecting the capacity a spray outlet (11, 11a, 11b) and a return outlet (12, 12a, 12b) for the space (100, 100a, 100b), the switching mechanism (20) being rotatably disposed in the receiving space (100) The switching mechanism (20) has a shielding area (201, 201a, 201b) and a discharging area (202, 202a, 202b); wherein the shielding area (201, 201a, 201b) shields the spraying outlet (11) , 11a, 11b) and one of the return outlets (12, 12a, 12b) are shielded to a degree equal to the discharge zone (202, 202a, 202b) corresponding to the spray outlet (11, 11a, 11b) and the return outlet ( The degree of opening of the other of 12, 12a, 12b);
a spraying circuit (30) connecting the spraying outlets (11, 11a, 11b);
a spraying unit (40) connected to the other end of the spraying circuit (30) with respect to the spraying outlet (11, 11a, 11b);
a return circuit (50) connected to the return outlet (12, 12a, 12b); and a return tank (60) connected to the other end of the return circuit (50) with respect to the return outlet (12, 12a, 12b) . [Item 2] The spraying device of claim 1, wherein the switching mechanism (20) comprises a cylinder (22), the shielding area (201, 201a, 201b) is a blocking wall, and the discharging area (202, 202a, 202b) As a liquid space, the retaining wall (23) and the liquid containing space are respectively disposed on the column (22). [Item 3] The spraying device of claim 1, wherein the spraying unit is a nozzle or a knife. [Item 4] The switching valve of claim 1, wherein the switching mechanism (20) comprises a shaft (21) connected to the switching mechanism (20), the shaft (21) being driven by an external force The switching mechanism (20) rotates. [Item 5] The switching valve of claim 1, wherein the switching mechanism (20) comprises a cylinder (22), the shielding area (201, 201a, 201b) is a blocking wall (23), and the discharging area (202, 202a, 202b) is a liquid containing space, and the retaining wall (23) and the liquid containing space are located on the cylindrical cylinder (22). [Item 6] The switching valve according to claim 5, wherein an angle (a, m, n) is formed between the spray outlet (11, 11a, 11b) and the return outlet (12, 12a, 12b), the angle (a, m, n) is 180 degrees, 90 degrees or 135 degrees. [Item 7] The switching valve of claim 6, wherein the retaining wall (23) is a curved piece. [Item 8] The switching valve according to claim 6, wherein the discharge zone ((202, 202a, 202b) has an opening angle (A, M, N), the opening angle (A, M, N) is equal to the spraying outlet (11, 11a, 11b) and the angle (a, m, n) between the return outlets (12, 12a, 12b). [Item 9] A spraying switching method of a spraying device, which connects a pump and provides a working liquid, the method comprising: a) providing a switching valve (10, 10a, 10b), the switching valve (10, 10a, 10b) comprising a switching mechanism (20), a receiving space (100) communicating with the receiving space (100) An outlet (11, 11a, 11b) and a return outlet (12, 12a, 12b); the switching mechanism (20) is rotatably disposed in the accommodating space (20) and has a shielding area (201, 201a, 201b) And a discharge zone (202, 202a, 202b);
b) switching the switching valve (1, 1a, 1b), wherein the shielding area (201, 201a, 201b) shields the spray outlet (11, 11a, 11b) and one of the return outlets (12, 12a, 12b) The degree of shading is equal to the extent to which the discharge zone (202, 202a, 202b) corresponds to the other of the spray outlets (11, 11a, 11b) and the return outlets (12, 12a, 12b).