JPH04117965U - flow control valve - Google Patents

Abstract

(57) [Summary] [Structure] The housing 11 is provided with an inlet 13 and an outlet 14, and a hole 12 communicating with the inlet 13 and the outlet 14 is provided. A valve body 16 having a surface is slidably fitted thereinto, and a flow path groove 18 is provided on the outer peripheral surface of the valve body 16 to enable communication between the outlet 14 and the inlet 13. A packing mounting valve seat 15 is provided, and a packing 19 having a lip 21 thinner than the mounting portion protruding in the axial direction is provided on the valve seat 15, and the lip 21 comes into contact with the outer peripheral surface of the valve body 16. do. [Effect] Since the lip 21 protruding in the axial direction comes into contact with the valve body 16, it provides good sealing performance and reduces sliding resistance. Furthermore, the packing is not damaged by the flow channel groove of the valve body.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a flow control valve that controls the flow rate of fluid. Especially for residential equipment and vehicles. The present invention relates to a flow control valve useful for use in physical equipment, etc.

0002

[Conventional technology]

Flow control valves are used to adjust the flow rate of fluids such as water and oil.

0003 A conventional flow control valve used for toilet bowls is shown in FIG. Flow control valve 1 has a cylindrical valve body 6 in the housing 2, and a flow path groove 8 is provided in the valve body 6. It is being The flow passage groove 8 is formed in the valve body 6 in a band-like manner and the depth gradually changes. It is formed. When the valve body 6 rotates, the flow path groove 8 is moved relative to the fluid flow path. to increase or decrease the effective cross-sectional area of the flow path.

0004 When the valve body 6 is in the flow path closing position, it is necessary to reduce the outflow flow rate of the fluid to zero. child In order to completely close the flow path, conventionally, the valve body 6 and the fluid flow path on the housing 2 side A valve seat was provided between them, and a rubber O-ring 5 was interposed therebetween.

[0005]

[Problem that the idea aims to solve]

However, when the O-ring 5 is interposed, the outer peripheral surface of the valve body 6 becomes a part of the flow path. Since the passage groove is formed, the passage groove on the outer peripheral surface of the valve body 6 and the inner circumference of the housing 2 Problems occur due to the relationship with the surface. For example, when the valve body is rotated, the rubber O-ring 5 is damaged. In addition, in order to close the O-ring 5 by pressing it against the valve body, the valve body and the O-ring The sliding resistance between the Also, the bottom of the recess for installing the O-ring. Because it can only be made flat due to processing, the sealing contact between the valve body and O-ring may be incomplete. Become whole.

[0006] Furthermore, when automating flow control equipment, large sliding resistance is a negative factor. Become. This is because the valve body malfunctions, the motor that drives the valve body becomes larger, the valve body or housing This leads to problems such as difficulty in using resin for resin, increased manufacturing costs, and increased power consumption. It is.

[0007] Soften the O-ring material to reduce the sliding resistance caused by the O-ring. In such a case, the sliding resistance can be reduced, but the seal Problems may arise in terms of elasticity and wear resistance, and the rigidity of the O-ring itself may decrease. child Therefore, the O-ring is likely to wear out due to the rotation of the valve body, resulting in decreased durability. A problem arises.

[0008] In view of the problems of the prior art described above, the purpose of the present invention is to completely reduce the flow rate when the flow path is closed. Provides a flow control valve that can be reduced to zero, has low sliding resistance, and has a long service life. It is to be.

[0009]

[Means to solve the problem]

The flow control valve according to the present invention has a housing, and the housing has an inlet and an outlet. At the same time, a hole is provided that communicates with the inlet and the outlet, and this hole has an outer peripheral surface. A valve body is slidably fitted to the outer peripheral surface of the valve body so that the outflow port and the inflow port can communicate with each other. A groove for the flow passage is provided, and a valve seat for mounting the packing is provided at the starting end of the outlet, and the axis is centered on the valve seat. A packing is provided that has a thinner lip than the mounting part that protrudes in the direction, and the lip is attached to the valve. It is characterized by contacting the outer peripheral surface of the body.

0010

[Effect]

Since the thin-walled lip contacts the surface of the valve body, close contact with the circumferential surface is ensured. Ensures good sealing performance and reduces sliding resistance between the valve body and packing. It gets colder.

[0011] On the other hand, the packing ensures sealed contact even when the valve body swings. .

0012

【Example】

Embodiments of the present invention will be described below with reference to the drawings.

[0013] FIG. 1 is a conceptual diagram showing a flow control valve 10 used in a toilet bowl. The housing 11 is It has a hole 12 with a cylindrical inner surface shape, into which a cylindrical valve body 16 can freely slide. It is fitted. The housing 11 is provided with an inlet 13 and an outlet 14 for fluid. , and both communicate with a common hole 12 . The inlet 13, the outlet 14, and the hole 12 are all in one place. It consists of two flow paths. The flow path of the outflow port 14 is formed narrower than the flow path of the inflow port 13. There is.

[0014] A valve seat 15 is provided in a concave shape at the starting end of the flow path of the outlet 14 (that is, near the hole 12). It is written.

[0015] The valve body 16 is slidably fitted into the hole 12 of the housing 11 as described above. and is rotatable around the central axis (in the direction of arrow 17). The valve body 16 is For example, it is supported by a bearing (not shown) and a motor etc. (not shown). driven by. A band-shaped flow passage groove 18 is formed in the circumferential direction on the peripheral surface of the valve body 16. It is provided. This flow channel groove 18 gradually becomes deeper from one end to the other end. . The width of the flow passage groove 18 is slightly smaller than the diameter of the lip 21 of the packing 19, which will be described later. It's getting better.

[0016] A packing 19 made of an elastic material is installed on the valve seat 15 at the starting end of the outlet 14. . As shown in FIG. 1, the packing 19 extends from the thick mounting portion 20 to the lip 2 1 protrudes so that the lip 21 contacts the surface of the valve body 16 with a predetermined pressure. Set.

[0017] If the flat part of the valve body 16 (the part without the flow passage groove) faces the outlet 14, , the flow path is completely blocked by the packing 19. In this case, the flow rate becomes zero.

[0018] FIG. 2 is an enlarged sectional view of the packing 19 shown in FIG. The entire packing 19 It is generally formed into an annular shape and has a thin lip 21. Lip 21 is thick It has a shape that is integrally connected to the meat attachment part 20. The packing 19 has a cross section It is approximately T-shaped or convex. The tip of the lip 21 is rounded. lip 21 The tip of the valve body 16 becomes the joint surface, but in this embodiment, the joint surface is one plane. It is formed so that it is located at the top. The packing 19 is made of a rubber-like elastic material.

[0019] Next, the operation of the flow control valve 10 shown in FIG. 1 will be explained.

[0020] The valve body 16 is rotated by a motor (not shown), and the water is supplied from the inlet 13. Fluid is transferred from the outlet 14 to the toilet bowl (not shown) at any flow rate from zero to a maximum value. to be discharged.

[0021] When the region 16a of the valve body 16 without a flow path groove faces the outlet 14, , the outflow port 14 is completely sealed by the packing 19, and the amount of fluid flowing out is zero. Ru.

[0022] When the valve body 16 is rotated counterclockwise in FIG. 1, the outflow amount gradually increases. stop When the deepest part of the flow passage groove 18 faces the outflow port 14, the outflow amount becomes maximum. . Conversely, when the valve body 16 is rotated clockwise, the outflow amount gradually decreases. It finally reaches zero.

[0023] During this operation, only the thin lip 21 of the packing 19 comes into contact with the valve body. Therefore, the sliding resistance between the valve body 16 and the packing 19 is kept at a low value. Also, The valve body may rotate intermittently as necessary.

[0024] Next, modifications of the packing 19 will be described with reference to FIGS. 3 to 5.

[0025] The packing 19 shown in FIG. 3 has a substantially L-shaped cross section, and has a lip 21. The outer surfaces of the thick mounting portion 20 are aligned.

[0026] The packing 19 shown in FIG. 4 has an almost L-shaped cross section, which is the opposite shape from that in FIG. Therefore, the lip 21 and the inner surface of the thick mounting portion 20 are aligned. Lip 21 contact Since the mating surfaces are located on one plane, in these packings 19, the valve There is no need to position it relative to the body.

[0027] In the packing 19 shown in FIG. 5, the lip 21 has a tapered cross section. The top portion 21a of the lip 21 has a cylindrical shape to match the shape of the valve body. Therefore Sealing performance can be further improved. In this case, the packing 19 is placed on the circumferential surface of the valve body. Position them accordingly and install them in that position.

[0028] 6 to 9 show other embodiments of the flow control valve according to the present invention. flow rate control The control valve 30 is particularly used for a toilet bowl. In this example, the fluid outlet 3 4 and 34 are provided at two locations. Valve seat 1 provided at the starting end of the outflow ports 34, 34 5 is provided with two packings 19 shown in FIG.

[0029] In the packing 19 shown in FIG. 8, the lip 21 widens slightly toward the tip. The top portion 21a of the lip 21 has a cylindrical shape to match the shape of the valve body 16. subordinate Therefore, the packing 19 needs to be positioned and fixed in alignment with the cylindrical surface of the valve body.

[0030] The valve body 31 has two flow passage grooves 18, 18 corresponding to the two outlet ports 34, 34. are formed around approximately half the circumference. The two flow path grooves 18, 18 are They are offset from each other in the circumferential direction. In other words, the timing of flow rate adjustment may be shifted. ing. Of course, the flow rate may be adjusted at the same timing.

[0031] A motor shaft 36 is fixed to the center hole 37 of the valve body 18 . At the top of passage 42 is equipped with a float valve (made of NBR material) that can be moved up and down. Above the float valve 40 A passage 41 is provided on the right side. Water flows in from the passage 42 and pushes up the flow valve. and flows into the inlet 33. Due to an accident, etc., the inside of the passage 42 becomes negative pressure and water flows backwards. In this case, air or the like is sent into the passage 41 and the float valve 40 is closed.

[0032] In the above embodiment, the valve body is configured to rotate, but the valve body moves in the axial direction. (not shown). In this case, move the valve body in the axial direction. This moves the flow path groove to open and close the valve.

[0033] Note that the present invention is not limited to the above-mentioned embodiments. The shape and material of the packing 19 are , fluid pressure, flow rate, space, required sliding resistance value, and other specifications. The selection will be made based on the following. Basically, the lip 21 is connected in the axial direction to reduce sliding resistance. Ensures presser foot and sealing performance.

[0034] Furthermore, the configuration of the flow control valve can be modified in various ways. For example, in Figure 1, the inlet and It is also possible to replace the outlet so that the flow control valve is located on the inlet side.

[0035] Furthermore, the packing may be formed into an ellipse.

[0036]

[Effect of the idea]

b) The packing of this invention is provided with a lip that protrudes in the axial direction. , it is possible to make a sealed contact with the cylindrical surface of the valve body. Moreover, the lip The elastic deformability makes it possible to reduce sliding resistance.

[0037] b) Since the packing has an elastically deformable lip, the flow path of the valve body when rotating Will not be damaged by ditches.

[0038] c) Since the lip is configured to come into contact with the surface of the valve body, intermittent repeated rotation is required. Even if subjected to repeated action, it will not be damaged and its sealing performance will not be impaired.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a flow control valve conceptually illustrating the present invention.

FIG. 2 is an enlarged sectional view of the packing shown in FIG. 1.

FIG. 3 is an enlarged sectional view of a packing showing another example of the present invention.

FIG. 4 is an enlarged sectional view of a packing showing another example of the present invention.

FIG. 5 is an enlarged sectional view of a packing showing still another example of the present invention.

FIG. 6 is a sectional view conceptually showing another embodiment of the flow control valve of the present invention.

FIG. 7 is a cross-sectional view showing a part of the cross section taken along line AA in FIG. 6;

FIG. 8 is an enlarged sectional view of the packing shown in FIGS. 6 and 7.

FIG. 9 is a cross-sectional view of a flow control valve conceptually showing a conventional example.

[Explanation of symbols]

1, 10, 30 flow control valve 6, 16 Valve body 8, 18 Groove for flow passage 20 Packing body 21 Lip 19 Packing 12 holes 3, 13, 33 Inlet 4, 14, 34 Outlet 15 Valve seat 16a Flat part 37 Center hole 36 Motor shaft 5 ring 21, 11, 35, 39 Housing 20 Mounting part 40 Check valve 41, 42, 43 aisle

Claims (1)

[Scope of utility model registration request] 1. A housing (1), wherein the housing (11) is provided with an inlet (13) and an outlet (14), and the inlet (13) and the outlet (14) are provided with an inlet (13) and an outlet (14). A communicating hole (12) is provided, a valve body (16) having an outer circumferential surface is slidably fitted into the hole (12), and the outlet port (14) is formed on the outer circumferential surface of the valve body (16). A flow path groove (18) that can communicate with the inflow port (13) is provided, and a valve seat (15) for attaching a packing is provided at the starting end of the outflow port (14), so that the valve seat (15) A flow control valve characterized in that a packing (19) having a lip (21) thinner than a mounting portion protruding in the axial direction is provided, and the lip (21) contacts the outer circumferential surface of a valve body (16). .