JPH04137756U - Paint pressure control valve - Google Patents

Abstract

(57) [Summary] [Purpose] To reliably prevent paint or cleaning fluid from stagnation within a pressure control valve, thereby facilitating efficient and highly accurate cleaning work. [Structure] An inlet chamber 14 having an inlet 12 connected to a paint supply source, an outlet chamber 18 having an outlet 16 connected to a paint gun, and the inlet chamber 14 and the outlet chamber 18 communicate with each other. The valve port 20 is engaged with the first valve seat 22 and the valve port 20 is engaged with the first valve seat 22.
A valve body 26 having a first valve part 24 that can freely open and close the inflow chamber 14 and a second valve seat 32 that engages with a second valve part 30 is attached to the top part 2.
8 and has a notch 34 facing substantially opposite to the outlet 16, and a flow path member 36 for forming the valve port 20 into a conical shape.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a paint pressure control valve for supplying paint from a paint supply source to a paint gun. Regarding.

0002

[Conventional technology]

Adjusts the paint supplied from the paint supply source to a predetermined flow rate and sends it to the paint gun. Pressure control valves have traditionally been used for This is disclosed in Japanese Utility Model Application Publication No. 2-95557.

0003 This prior art includes an inlet chamber provided with an inlet connected to a paint supply source and a paint An outflow chamber provided with an outflow port connected to the gun communicates the inflow chamber and the outflow chamber. a valve port, and a valve body that engages with a valve seat formed in the valve port to freely open and close the valve port. and selectively drive a pressing body and an actuating body that are pressed in opposite directions. By displacing this valve body and adjusting the opening degree of the valve port, a predetermined flow rate of paint is applied. is configured to supply the paint gun with the paint gun.

0004 However, in this case, the paint introduced into the outflow chamber from the valve port flows toward the outflow port. Because the paint flows easily, paint accumulates in the part of the outflow chamber opposite to the outflow port. However, inconveniences occur especially when performing color change coating using the same coating device.

[0005] In other words, the paint path, including the pressure control valve, must not be cleaned before changing the paint color. At that time, make sure that the cleaning solution is in the part of the outflow chamber opposite to the outflow port mentioned above. In fact, the cleaning work in this area becomes difficult. This results in , problems such as a large amount of cleaning solution being required and a long cleaning time have been pointed out. ing.

[0006] Therefore, as disclosed in Utility Model Application Publication No. 58-18068, the outlet and the Efforts have been made to provide an opening on the opposite side that serves as a passage for paint, etc.

[0007]

[Problem that the idea aims to solve]

However, in the above conventional technology, the coating from the inlet to the outlet via the valve orifice is There are many stepped shapes in the feed route, and even if passage openings are provided, It has been pointed out that there are problems with cleaning performance and the inconvenience of large pressure loss. There is.

[0008] This invention solves this type of problem and prevents paint or cleaning from inside the pressure control valve. Reliably prevents the stagnation of cleaning fluid, which allows for efficient and highly accurate cleaning work. An object of the present invention is to provide a paint pressure control valve that can easily perform the following steps.

[0009]

[Means to solve the problem]

To achieve the above object, the present invention provides an inlet connected to a paint supply source. an evacuated inflow chamber; an outflow chamber provided with an outflow port connected to a paint gun; a valve port that communicates the inflow chamber and the outflow chamber; A first valve seat that engages with a first valve seat formed in the valve port to freely open and close the valve port and the inflow chamber. a valve body provided with a first valve portion and a second valve portion coaxial with the first valve portion; When the first valve portion of the valve body is separated from the first valve seat, the first valve portion of the valve body engages with the second valve portion of the valve body. A mating second valve seat is formed at the top that bulges into the outflow chamber and It has a notch that communicates the outflow chamber and the valve port in a direction substantially opposite to the outlet. and the opening diameter of the valve opening increases from the first valve part to the second valve part. and a flow path member for forming a conical shape.

0010

[Effect]

In the paint pressure control valve according to the present invention described above, water flows from the inlet to perform cleaning work. When the cleaning fluid is supplied to the chamber, the valve body is driven and the first valve part is separated from the first valve seat. At the same time, the second valve part of the valve body engages with the second valve seat of the flow path member, so this cleaning process The cleaning fluid flows into the outflow chamber through the notch formed in the flow path member and reaches the outflow port. supplied to At that time, the notch is formed in a direction substantially opposite to the outlet. Because of this, the entire outflow chamber can be cleaned with the cleaning fluid, and the The shape of the valve opening is conical, with the opening diameter increasing from the first valve part to the second valve part. Because the cleaning fluid is selected to flow smoothly into the outflow chamber, cleaning performance is improved at once. can be improved.

[0011]

【Example】

Examples of the pressure control valve for paint according to the present invention will be given below, with reference to the attached drawings. This will be explained in detail below.

0012 1 to 3, reference numeral 10 indicates a paint pressure control valve according to the present invention. vinegar. This pressure control valve 10 has an inlet 12 connected to a paint supply source (not shown). An inlet chamber 14 is provided, and an outlet port 16 is provided which is connected to a painting gun (not shown). an outflow chamber 18, a valve port 20 that communicates between the inflow chamber 14 and the outflow chamber 18; It engages with a first valve seat 22 formed on the valve port 20 to open the valve port 20 and the inflow chamber 14. A first valve portion 24 that is freely closable and a second valve portion 30 that is coaxial with the first valve portion 24 are provided. a second valve body 26 of the valve body 26 and a top portion 28 that bulges into the outflow chamber 18; A second valve seat 32 that engages with the valve portion 30 is formed and is substantially opposite to the outlet port 16. It has a notch 34 that communicates the outflow chamber 18 and the valve port 20 in the direction toward the opposite side. the opening diameter of the valve port 20 from the first valve part 24 to the second valve part 30; A flow path member 36 for forming a conical shape into which the flow path member 36 expands. is disposed between the first body 10a and the second body 10b.

[0013] The inflow chamber 14 is formed in the first body 10a, and the flow path is connected to the first body 10a. The first valve seat 22 and the seal member 38 are arranged between the member 36 and the first valve seat 22 . to the valve body 26 is a part located inside the valve port 20 from the first valve part 24 toward the second valve part 30. A tapered portion 40 whose diameter expands is formed, and a third portion is formed in this tapered portion 40. Two valve parts 30 are supported.

[0014] The second valve portion 30 and the pressing member 42 allow the diaphragm 44 to be attached to the valve body 26. Fixed. The outer end of this diaphragm 44 connects the flow path member 36 and the second body 10. The second body 10b and the diaphragm 44 form a diaphragm. A room 46 is formed. This diaphragm chamber 46 is formed in the second body 10b. It communicates with a pressurized air supply source (not shown) through a port 48.

[0015] Next, the operation of the pressure control valve 10 configured as described above will be explained.

[0016] First, a predetermined color is supplied from a paint supply source (not shown) to the inlet chamber 14 through the inlet 12. Paint is being supplied, and in this state a pressure (not shown) is applied to the port 48 of the second body 10b. When signal air is supplied from the power air supply source, the inside of the diaphragm chamber 46 becomes high pressure. The diaphragm 44 is then lowered together with the valve body 26. Therefore, the first part of the valve body 26 The valve portion 24 is separated from the first valve seat 22 (see FIG. 3). If paint consumption is high, The pressure in the outlet chamber 18 tries to decrease, but the balance with the diaphragm chamber 46 is lost. The degree of separation of the first valve portion 24 becomes large, and the paint pressure supplied to the gun becomes reliable. It becomes equal to the number pressure. When the consumption of paint is small, the degree of separation of the first valve part 24 is The paint pressure becomes equal to the signal pressure. The flow path resistance on the painting gun side is Since it is a constant value, the flow rate of the paint is controlled by the pressure of the signal air input to the pressure control valve 10. can be controlled.

[0017] The paint in the inflow chamber 14 passes through the gap between the first valve part 24 and the first valve seat 22 and enters the valve port 2. 0, the notch 34 of the flow path member 36, the second valve part 30 and the second valve seat 3 2 into the outflow chamber 18, and is provided in a direction substantially opposite to this notch 34. The liquid flows through the outlet 16 provided in the drawing, and is supplied to a coating gun (not shown). Here, the notch Since the portion 34 is formed in a direction substantially opposite to the outflow port 16, the outflow chamber 1 It is possible to effectively prevent the paint from stagnation within the chamber 8.

[0018] When the supply of paint to the paint gun is finished, signal air is supplied to the diaphragm chamber 46. When the supply is stopped, the valve body 26 rises and the first valve portion 24 is placed on the first valve seat 22. When engaged, the inflow chamber 14 and the outflow chamber 18 are isolated from each other.

[0019] Next, when a paint of a different color from that used in the above-mentioned painting operation is used, In this case, driving air is supplied to the port 48 and the second valve portion 30 opens the second valve portion of the flow path member 36. While engaged with the valve seat 32, the entire paint flow path inside the pressure control valve 10 is cleaned. It will be done. That is, the cleaning fluid is supplied from the inlet 12 to the inflow chamber 14, and this cleaning As the valve body 26 descends, the fluid flows from the valve port 20 through the notch 34 to the outflow chamber 18. is introduced into the air, and further discharged to the outside of the pressure control valve 10 through the outlet 16. So Finally, the supply pressure of signal air to the diaphragm chamber 46 is repeatedly increased and decreased. The second valve portion 30 and the second valve seat 32 are brought into contact with each other by 30 and the second valve seat 32 are cleaned.

[0020] In this case, in this embodiment, the valve port 20 is connected to the first valve portion 24 by the flow path member 36. Because it is formed in a conical shape whose opening diameter widens toward the second valve part 30. , unlike those with traditional stepped paint paths, the flow of cleaning fluid is blocked. There are no areas where the cleaning fluid can easily penetrate. Therefore, the cleaning fluid is 20 toward the outflow chamber 18, avoiding poor cleaning. The effect is that it becomes possible to carry out efficient and highly accurate cleaning work. Ru. In addition, the valve body 26 has a second valve section from the first valve section 24 located within the valve port 20. Since a tapered portion 40 is formed whose diameter widens toward the valve portion 30, The flow of the cleaning fluid at the valve port 20 becomes smoother, and cleaning performance is improved. At the same time, the pressure loss of this cleaning fluid can be reduced all at once.

[0021]

[Effect of the idea]

According to the paint pressure control valve according to the present invention, the following effects can be obtained.

[0022] The direction in which the cleaning fluid supplied from the inlet to the inlet chamber is directed toward the side substantially opposite to the outlet. It flows through the notch formed in the outflow chamber and is supplied to this outflow port, and The shape of the valve opening is a conical shape whose opening diameter increases from the first valve part to the second valve part. has been selected. Therefore, the flow of the cleaning fluid is not blocked. The flow can flow smoothly to the outflow chamber side, making cleaning work inside the pressure control valve more efficient at once. This makes it possible to carry out tasks efficiently and with high precision.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a paint pressure control valve according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the pressure control valve.

FIG. 3 is an explanatory diagram of the operation of the pressure control valve.

[Explanation of symbols]

10...Pressure control valve 12...Inlet 14...Inflow chamber 16... Outlet 18...Outflow chamber 20...benchmark 22...Valve seat 24... Valve part 26... Valve body 28...Top 30...Valve part 32...Valve seat 34...Notch 36...Flow path member 40...Tapered part

Continuation of front page (72) Creator Hiroshi Ochiai Hondae, 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Within Engineering Co., Ltd. (72) Creator Shigeru Kageyama Hondae, 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Within Engineering Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. An inlet chamber provided with an inlet connected to a paint supply source, an outlet chamber provided with an outlet connected to a paint gun, and a valve port communicating the inlet chamber and the outlet chamber. and,
A valve provided with a first valve portion that engages with a first valve seat formed in the valve port to freely open and close the valve port and the inflow chamber, and a second valve portion that is coaxial with the first valve portion. a second valve seat that engages a second valve portion of the valve body when the first valve portion of the valve body is separated from the first valve seat is formed on a top portion that bulges into the outflow chamber; and has a notch that communicates the outflow chamber and the valve port in a direction substantially opposite to the outflow port,
and a flow passage member for forming the valve port into a conical shape whose opening diameter widens from the first valve part to the second valve part. 2. The pressure control valve according to claim 1, wherein the valve body has a tapered portion at a portion located within the valve port, the diameter of which increases from the first valve portion toward the second valve portion. Features: Paint pressure control valve.