JP7389625B2 - one way throttle valve - Google Patents

Description

The present invention has a valve body that is seated on a valve seat, and when the fluid flows in one direction, the fluid flows freely, and when the fluid flows in the opposite direction, the fluid is throttle-controlled and flows in one direction. Regarding throttle valves.

This type of one-way throttle valve has a ball valve element biased by a spring seated on a valve seat, and when fluid flows in one direction, the ball valve element is removed from the valve seat and the fluid flows freely. . In addition, when the fluid flows in the other direction, the ball valve element is seated on the valve seat and the fluid is controlled to flow through the throttle channel.

Publication of Utility Model Publication No. 2-103162

However, in the one-way throttle valve of Patent Document 1, the main body is provided with a valve seat member forming a valve seat on which a ball valve element is seated, and the throttle flow path for throttling and controlling the fluid is arranged in the main body so as not to interfere with the valve seat member. Because of this, the main body needs a part that bypasses the valve seat member to form a throttle flow path, which increases the size of the main body, resulting in the problem that the entire valve becomes large.

An object of the present invention is to provide a one-way throttle valve that can suppress the increase in size of the main body and the overall size of the valve without forming a throttle flow path in the main body to throttle and control the fluid.

In order to achieve this object, the present invention has taken the following measures. That is,
A cylindrical valve seat member in which a small diameter hole and a large diameter hole larger than the small diameter hole are connected to form a valve seat in the continuous stepped part, and a valve seat that is housed in the large diameter hole of the valve seat member. a ball-shaped valve body that seats on the valve seat; a spring that biases the valve body in the direction in which the valve seat is seated; a body formed with a housing hole for housing the valve seat member; A first inflow/outflow channel connected to the small-diameter hole, and a second inflow/outflow channel formed in the main body and having one end opened on the inner circumferential surface of the housing hole , the inner circumferential surface of the housing hole and the valve seat member. An annular gap is defined between the valve seat member and the outer surface, and a throttle channel is formed in the valve seat member to throttle and control the fluid. is opened on the outer surface of the valve seat member, this opening is connected to one end opening of the second inflow and outflow channel via an annular gap , and one end of the valve seat member is further opened on the inner circumferential surface of the large diameter hole. At the same time, a connecting flow path is formed whose other end is opened on the outer surface of the valve seat member, and the other end opening of the connecting flow path is connected to one end opening of the second inflow/output flow path via an annular gap. This is a one-way throttle valve characterized by having a flow cross-sectional area through which fluid flows larger than the throttle channel .

As described in detail above, the invention according to claim 1 is such that the valve seat member is provided with a throttle flow path that throttles and controls the fluid, and one end of the throttle flow path is opened to the inner circumferential surface of the small diameter hole. The other end was opened on the outer surface of the valve seat member, and this opening was connected to the second inflow/outflow channel. Therefore, the throttle channel formed in the valve seat member can communicate between the small diameter hole connected to the first inlet/outlet channel and the second inlet/outlet channel without going through the valve seat, so the fluid can be throttled and controlled. By not forming a restricting flow path in the main body, it is possible to suppress the enlargement of the main body and the overall size of the valve.

Further, in the invention as claimed in claim 1 , an accommodation hole for accommodating the valve seat member is formed in the main body, one end of the second inflow/outflow channel is opened in the inner circumferential surface of the accommodation hole, and this opening was connected to the other end opening of the throttle channel. Therefore, by housing the valve seat member in the housing hole of the main body, the throttle channel and the second inflow/outflow channel can be reliably connected.

In addition, the invention according to claim 1 forms a connection flow path in which one end is opened to the inner circumferential surface of the large diameter hole and the other end is opened to the outer surface of the valve seat member. The other end opening was connected to one end opening of the second inflow and outflow channel. Therefore, by housing the valve seat member in the housing hole of the main body, the connection flow path can be reliably connected to the second inflow/outflow flow path in parallel with the throttle flow path.

FIG. 1 is a longitudinal sectional view of a one-way throttle valve showing an embodiment of the present invention. FIG. 2 is a circuit diagram of one embodiment.

Hereinafter, one embodiment of the present invention will be described based on the drawings.
In FIGS. 1 and 2, 1 is a main body, and a bottomed storage hole 2 is bored from one side 1A. The storage hole 2 has a small diameter portion 2B formed on the bottom surface 2A side of the tip. The main body 1 has one end opened at the bottom surface 2A of the storage hole 2 to form a first inflow/outflow channel 3, and one end opened at the inner peripheral surface of the storage hole 2 to form a second inflow/outflow channel 4. , and both inflow and outflow channels 3 and 4 allow fluid to flow. Reference numeral 5 denotes a cylindrical valve seat member, the tip of which fits into the small diameter portion 2B of the housing hole 2, contacts the bottom surface 2A of the housing hole 2, and is housed in the housing hole 2. The valve seat member 5 has a chamfered end and is fitted with a sealing member 5A, and the part that contacts the bottom surface 2A is sealed with the sealing member 5A. When the valve seat member 5 is housed in the housing hole 2, an annular gap F is defined between the inner peripheral surface of the housing hole 2 and the outer surface of the valve seat member 5.

A small diameter hole 6 and a large diameter hole 7 having a larger diameter than the small diameter hole 6 are formed in the valve seat member 5 in a continuous manner in the axial direction, and a continuous stage between the small diameter hole 6 and the large diameter hole 7 is formed. A valve seat 8 is formed in the portion. The small diameter hole 6 opens at the distal end surface of the valve seat member 5 and is connected to the first inflow/outflow channel 3 which opens at one end at the bottom surface 2A of the housing hole 2. A ball-shaped valve body 9 is housed in the large diameter hole 7 of the valve seat member 5 and is seated on the valve seat 8. A spring 10 is housed in the large diameter hole 7 of the valve seat member 5 and urges the valve body 9 in the seating direction of the valve seat 8. Reference numeral 11 denotes a throttle flow passage for throttling and controlling the fluid, which is formed by perforating the valve seat member 5 in the radial direction, with one end opening on the inner circumferential surface of the small diameter hole 6, and the other end opening on the outer surface of the valve seat member 5. It is open to The other end opening of the throttle channel 11 is connected to one end opening of the second inflow/outflow channel 4 via a gap F.

Reference numerals 12A and 12B are two connecting channels formed in the valve seat member 5, one end of which is open to the inner circumferential surface of the large diameter hole 7, and the other end of which is open to the outer surface of the valve seat member 5. Both connecting channels 12A and 12B have a larger flow cross-sectional area through which fluid flows than the throttle channel 11, and are arranged at radially symmetrical positions with respect to the valve seat member 5. The other end openings of both connecting channels 12A and 12B are connected to one end opening of the second inflow/output channel 4 via a gap F, respectively. Reference numeral 13 denotes a plug member, which is inserted into the housing hole 2 with its opening side sealed with a seal member 14, and the valve seat member 5 is pressed and held against the bottom surface 2A of the housing hole 2. A cover member 15 is detachably attached to one side surface 1A of the main body 1 with a plurality of bolt members 16, and covers the plug member 13.

Next, the operation of this configuration will be explained.
In the case of free flow, the fluid flows from the first inflow/outflow channel 3. The fluid in the first inflow/outflow channel 3 flows through the small diameter hole 6, pushes the valve body 9 open against the spring force of the spring 10, moves the valve body 9 to the left in FIG. 1, and separates from the valve seat 8. Then, it flows through the large diameter hole 7, the connection channels 12A and 12B, and the gap F, and flows into the second inflow and outflow channel 4. At this time, some of the fluid flows from the small diameter hole 6 through the throttle channel 11 and the gap F to the second inflow/outflow channel 4 .

In the case of controlled flow, the fluid is caused to flow from the second inflow/outflow channel 4 . Since the valve body 9 is seated on the valve seat 8 by the action force based on the pressure of the fluid and the spring force of the spring 10, the fluid in the second inflow/outflow channel 4 flows through the throttle channel 11 from the gap F and is throttle-controlled. , flows from the small diameter hole 6 to the first inflow/outflow channel 3 .

In such an operation, the valve seat member 5 is formed with a throttle channel 11 that throttles and controls the fluid. It opened on the outer surface, and this opening was connected to the second inflow/outflow channel 4 . Therefore, the throttle channel 11 formed in the valve seat member 5 can communicate between the small diameter hole 6 connected to the first inflow and outflow channel 3 and the second inflow and outflow channel 4 without passing through the valve seat 8. Therefore, it is possible to suppress the enlargement of the main body 1 and the enlargement of the entire valve without forming a throttle flow path in the main body 1 to throttle and control the fluid.

Further, an accommodation hole 2 for accommodating the valve seat member 5 is formed in the main body 1, and one end of the second inflow/outflow passage 4 is opened on the inner peripheral surface of the accommodation hole 2, and this opening is used as a constricted passage. It was connected to the other end opening of 11. Therefore, by housing the valve seat member 5 in the housing hole 2 of the main body 1, the throttle channel 11 and the second inflow/outflow channel 4 can be reliably connected.

In addition, connecting channels 12A and 12B are formed in the valve seat member 5, with one end opening to the inner circumferential surface of the large diameter hole 7 and the other end opening to the outer surface of the valve seat member 5. The other end opening was connected to one end opening of the second inflow/outflow channel 4 . Therefore, by housing the valve seat member 5 in the housing hole 2 of the main body 1, the connecting channels 12A and 12B can be reliably connected to the second inflow/outflow channel 4 in parallel with the throttle channel 11. I can do it.

In the above-described embodiment , two connection channels 12A and 12B are provided, but the number of connection channels may be one or three or more. Furthermore, although the valve seat member 5 has a chamfered end and is fitted with the seal member 5A, it goes without saying that the seal member 5A may not be provided depending on the application.

1: Main body 3: First inflow/output channel 4: Second inflow/output channel 5: Valve seat member 6: Small diameter hole 7: Large diameter hole 8: Valve seat 9: Valve body 10: Spring 11: Throttle channel

Claims (1)

A cylindrical valve seat member in which a small diameter hole and a large diameter hole larger than the small diameter hole are connected to form a valve seat in the continuous stepped part, and a valve seat that is housed in the large diameter hole of the valve seat member. a ball-shaped valve body that seats on the valve seat; a spring that biases the valve body in the direction in which the valve seat is seated; a body formed with a housing hole for housing the valve seat member; A first inflow/outflow channel connected to the small-diameter hole, and a second inflow/outflow channel formed in the main body and having one end opened on the inner circumferential surface of the housing hole , the inner circumferential surface of the housing hole and the valve seat member. An annular gap is defined between the valve seat member and the outer surface, and a throttle channel is formed in the valve seat member to throttle and control the fluid. is opened on the outer surface of the valve seat member, this opening is connected to one end opening of the second inflow and outflow channel via an annular gap , and one end of the valve seat member is further opened on the inner circumferential surface of the large diameter hole. At the same time, a connecting flow path is formed whose other end is opened on the outer surface of the valve seat member, and the other end opening of the connecting flow path is connected to one end opening of the second inflow/output flow path via an annular gap. is a one-way throttle valve characterized by having a flow cross-sectional area through which fluid flows larger than the throttle channel .

Images