KR20210098328A - Pressure regulating valve - Google Patents

Abstract

[Problem] To provide a pressure regulating valve capable of suppressing pressure fluctuations of supplied gas, allowing high-precision adjustment, and preventing unintentional change in set pressure from occurring.
[Solution Means] The pressure regulating valve 1 includes a first flow path 20 communicating with a secondary port 14 at the other end from the primary port 12 at one end of the cylindrical body case 10 and the flow path. It has an on/off valve 30 for opening and closing, and the primary port 12 and the secondary port 14 are arranged so that the central axis of the intake port 16a and the central axis of the exhaust port 18a are on the same axis, The pressure receiving area on the side of the primary port 12 is defined by the inner diameter of the seat surface 36a at the position where the first seal 34 of the valve body 31 of the on/off valve 30 abuts, and the secondary port 14 ) side is defined as the inner diameter of the main body case 11 at the position where the second seal 35 of the valve body 31 abuts, and the valve body 31 is connected to the central axis of the intake port 16a and Parallel to the central axis of the exhaust port 18a, a biasing member 62 for biasing in a direction from the primary port 12 to the secondary port 14 is provided.

Description

Pressure Regulating Valve {PRESSURE REGULATING VALVE}

The present invention relates to a pressure control valve, and more particularly, to a pressure control valve for adjusting the pressure of gas supplied to an external pneumatic device to a predetermined value.

BACKGROUND ART In automatic equipment lines for assembling mechanical devices, electronic devices, and the like, devices using pneumatic devices exemplified by an air cylinder or the like are often used. Since the operating pressure is set for each of these pneumatic devices, a pressure regulation valve which adjusts the pressure of the gas to be supplied to a predetermined value is conventionally used.

For example, as a conventional pressure regulating valve, the structure described in patent document 1 (Unexamined-Japanese-Patent No. 2004-192462) is known. This pressure regulation valve is comprised so that arbitrary pressure setting is possible between a high-pressure area|region and a low-pressure area|region by operating an operation dial.

In addition, the "pressure regulation valve" is different from the "safety valve (relief valve)" that protects the equipment by releasing the pressure when the pressure of the supplied gas exceeds a predetermined value due to some abnormality. However, there is a difference in configuration.

Japanese Patent Laid-Open No. 2004-192462

Here, in the conventional pressure control valve as exemplified in Patent Document 1, while arbitrary pressure adjustment is possible by operation of the operation dial, man-hours for adjustment are required, and further, a small amount of operation dial is required. There is a possibility that an unintentional change in the set pressure may occur even if it only comes into contact. Moreover, by providing the adjustment mechanism, an increase in the number of parts and complexity of the structure are caused.

In addition, in the pneumatic equipment to be connected, the operating pressure of the supply gas is set to a predetermined value in order to obtain an accurate operation. Therefore, the pressure regulation valve is required to be able to adjust the pressure of the gas to be supplied with high precision so that it may become a predetermined value with as little fluctuation as possible.

The present invention is made in view of the above circumstances, and it is possible to suppress fluctuations in the pressure of the gas to be supplied to enable high-precision adjustment, to reduce the number of adjustments, and to prevent an unintentional change in the set pressure from occurring. An object of the present invention is to provide a pressure regulating valve.

As one embodiment, the above problem is solved by means of a solution disclosed below.

The disclosed pressure regulating valve is a pressure regulating valve for adjusting the pressure of gas supplied to an external pneumatic device to a predetermined value. A primary port having an intake port connected to a supply source, a secondary port having an exhaust port provided at the second end of the main body case and connected to the external pneumatic device, and the fluid passing through communication between the intake port and the exhaust port A first flow path, an on/off valve provided in the middle of the first flow path to open and close the flow path, a tubular guide member provided inside the main body case and having an outer diameter smaller than the inner diameter of the main body case, and inside the guide member provided, a tubular flow path constituting member having an outer diameter smaller than the inner diameter of the guide member, wherein the primary port and the secondary port have a central axis of the intake port and a central axis of the exhaust port on the same axis and the flow path constituting member includes a first space constituting the first flow path at a radial center, a first through hole communicating the inside and the outside of the first space, and the secondary port close to has a seat surface constituting the valve seat of the on-off valve at the end of The large-diameter portion is formed, and a valve in which a first seal is externally wound on the small-diameter portion and a second seal is externally wound on the large-diameter portion, wherein the valve body is located at the center in the radial direction It has a second space constituting a flow path and a second through hole communicating the inside and the outside of the second space, wherein the small-diameter portion is internally wound around the guide member to be reciprocally movable, and the large-diameter portion is the main body. It is arranged inside the case so as to be reciprocally movable, and the pressure-receiving area on the side of the primary port is defined by the inner diameter of the seat surface at the position where the first seal abuts, the secondary port side At a position where the pressure-receiving area is in contact with the second seal a biasing member defined by the inner diameter of the body case of and a third space between the inner surface of the circumferential wall portion of the guide member and the outer surface of the circumferential wall portion of the flow path constituting member is configured as a second flow path, wherein the second flow path includes the first penetration of the flow path constituting member While it is comprised so that it may communicate with the said 1st flow path through a hole and the said 2nd through-hole of the said valve body, only the flow in the direction from the said secondary port toward the said primary port on the way. It is characterized in that it is provided with a check valve that allows.

According to the disclosed pressure regulating valve, it is possible to suppress the pressure fluctuation of the gas supplied to an external pneumatic device, and to achieve high-precision adjustment. Moreover, since the structure which does not provide an operation dial is implement|achieved, it becomes possible to reduce the number of adjustment man-hours and to prevent that an unintended change of a set pressure arises.

BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic (front sectional view) which shows the example of the pressure regulation valve which concerns on embodiment of this invention.
Fig. 2 is a schematic diagram (front sectional view) showing an example of a pressure regulating valve according to an embodiment of the present invention;
Fig. 3 is an enlarged view of a flow path structural member of the pressure regulating valve shown in Figs. 1 and 2;
Fig. 4 is an enlarged view of the valve body of the on-off valve of the pressure regulation valve shown in Figs. 1 and 2;
Fig. 5 is measurement data of pressure characteristics of the pressure regulating valve according to the embodiment of the present invention and the pressure regulating valve according to the conventional embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described in detail with reference to drawings. 1 and 2 are front sectional views (schematic views) showing an example of the pressure regulation valve 1 according to the present embodiment, and FIG. 1 is a state in which the on-off valve 30 is "open", 2 is a state in which the on-off valve 30 is "closed". 3 is an enlarged view of the flow path constituent member 50 of the pressure regulation valve 1, and FIG. 4 is an enlarged view of the valve body 31 of the on-off valve 30 of the pressure control valve 1 . In addition, in all the drawings for demonstrating embodiment, the same code|symbol is attached|subjected to the member which has the same function, and the repeated description may be abbreviate|omitted.

The pressure regulating valve 1 according to the present embodiment supplies gas (air) whose pressure is adjusted to a predetermined value to a pneumatic device provided in an automatic equipment line or the like for assembling a mechanical device or an electronic device. As a specific example of the said pneumatic device, actuators, such as an air cylinder, a vacuum generator, an air blow, etc. are mentioned. In all of them, the pressure (operating pressure) of the gas to be supplied is set as a predetermined value in order to perform an accurate operation. In addition, as a characteristic common to these pneumatic devices, an operation in which the internal pressure (working pressure) of the secondary side, that is, the pneumatic device is reduced by the pressure reduction of the primary side of the pressure regulation valve 1 is performed.

1, 2, the pressure regulation valve 1 is provided with the main body case 10 of cylindrical shape (for example, the general outline shape is cylindrical shape), and one 1st end part is provided. ) (10a) is provided with a primary port (12), the other second end (10b) is provided with a secondary port (14). As an example, the primary port 12 is configured such that the first pipe joint 16 is installed at the first end 10a, and the opening of the first pipe joint 16 is formed by an air compressor. It is configured as an intake port 16a connected directly or through a pipe to an external gas supply source (not shown), such as (however, it becomes an exhaust port when gas flows in the reverse direction). In addition, the secondary port 14 is configured by installing a second pipe joint 18 to the second end 10b, and the opening of the second pipe joint 18 is directly connected to the above-described external pneumatic device. Alternatively, it is configured as an exhaust port 18a connected through a pipe (however, it becomes an intake port when gas flows in the reverse direction). In addition, due to the circumstances of assembling the valve body 31 (described later) of the on/off valve 30 in the body case 10 in the manufacturing process, the second pipe joint 18 is the second end of the body case 10 . It is configured to be fixed to the cap member 22 fitted to the 10b. In addition, a well-known pipe joint is used for the 1st pipe joint 16 and the 2nd pipe joint 18, and description is abbreviate|omitted about the detailed structure.

Inside the main body case 10, a first flow path 20 through which the fluid passes through communication between the intake port 16a and the exhaust port 18a is provided. Further, in the middle of the flow path of the first flow path 20, an opening/closing valve 30 is provided in which the valve body 31 reciprocates in a direction parallel to the central axis C to open and close the flow path (details will be described later).

As a configuration characteristic of this embodiment, the primary port 12 and the secondary port 14 have the central axis of the intake port 16a and the central axis of the exhaust port 18a on the same axis (here, on the C axis). is structured to be According to this, in addition to the configuration of the substantially cylindrical main body case 10, it becomes possible to realize the pressure regulating valve 1 as a slim and compact shape. In particular, in the radial direction, since the entire body can be accommodated within the outer diameter dimension of the main body case 10, it is possible to install in a narrow place compared to a conventional device.

In order to realize the above configuration, the pressure regulating valve 1 has the following internal configuration. First, it is provided inside the main body case 10 and has a predetermined portion having an outer diameter smaller than the inner diameter of the main body case 10 and has a cylindrical shape (one) having a central axis coaxial with the central axis C of the main body case 10 . For example, the guide member 40 has a cylindrical shape in general. In this embodiment, the edge part of the primary port 12 side of the guide member 40 is provided as an integral structure continuous with the inside of the main body case 10. As shown in FIG. However, it is not limited to this structure, You may provide the guide member 40 as a structure separate from the main body case 10. As shown in FIG. In addition, what is necessary is just to select suitably the material which comprises the main body case 10 and the guide member 40 from a metal material or a resin material.

In addition, provided inside the guide member 40 and having a predetermined portion having an outer diameter smaller than the inner diameter of the guide member 40 , and having a central axis coaxial with the central axis C of the body case 10 (one For example, it has the flow path structural member 50 whose schematic shape is a different diameter cylindrical shape. Here, the first space 52 constituting the first flow passages 20 and 20A is provided at the radial center, and the first space 52 is provided at a position closer to the primary port 12 than the check valve 60 to be described later. A first through hole 54 communicating the inside and the outside of the space 52 is provided. In addition, in this embodiment, the flow path structural member 50 is provided as a structure separate from the guide member 40. As shown in FIG. In addition, what is necessary is just to select suitably the material which comprises the flow path structural member 50 from a metal material or a resin material.

Next, the on-off valve 30 according to the present embodiment will be described. The valve body 31 of the on/off valve 30 is formed with a small diameter portion 31a having a relatively small outer diameter near the primary port 12, and a large relatively large outer diameter portion near the secondary port 14. A neck 31b is formed. Here, in the small-diameter portion 31a (for example, the tip small-diameter portion 31c formed to be smaller at the tip of the small-diameter portion 31a), the first contact with the valve seat 36 of the on-off valve 30 (to be described later) One thread 34 is externally wrapped, and a second thread 35 in contact (sliding contact) with the peripheral wall part 11 (inner surface 11a) of the main body case 10 is externally wrapped in the large-diameter part 31b. has been In addition, the second space 32 constituting the first flow passages 20 and 20B is provided at the radial center, and the inside and the outside of the second space 32 are located in the vicinity of the tip of the small-diameter portion 31a. There is provided a second through hole 33 that communicates with the . In addition, what is necessary is just to select suitably the material which comprises the valve body 31 from a metal material or a resin material.

In the valve body 31 having the above-described configuration, the small-diameter portion 31a is reciprocally moved inside the cylinder of the guide member 40 , and the large-diameter portion 31b reciprocates in the cylinder of the main body case 10 . It is excreted so that it can be moved inside.

On the other hand, the valve seat 36 to which the valve body 31 of the on-off valve 30 retracts is provided in the flow path constituent member 50 . Specifically, the seat surface 36a of the valve seat 36 is formed at the end 50a near the secondary port 14 of the flow path structural member 50 . This seating surface 36a is formed as an inclined surface (chamfered) extending toward the end face 58 from the inner surface 56a of the peripheral wall portion 56 . In the present embodiment, the first seal 34 provided at the end near the primary port 12 of the small-diameter portion 31a of the valve body 31 and the seating surface 36a provided in the flow path constituent member 50 are retracted. Accordingly, opening and closing of the first flow path 20 (that is, switching between the communication and non-communication between the first flow passage 20A and the first flow passage 20B) is performed.

Further, in the pressure regulation valve 1 according to the present embodiment, the valve body 31 of the on-off valve 30 is parallel to the central axis of the intake port 16a and the central axis of the exhaust port 18a (that is, the main body case). (parallel to the central axis C of 10), the biasing member 62 which biases in the direction toward the secondary port 14 from the primary port 12 is also provided. This biasing member 62 is a fourth space 44 between the inner surface 11a of the circumferential wall portion 11 of the main body case 10 and the outer surface 42b of the circumferential wall portion 42 of the guide member 40 . ) is excreted to accommodate some or all of it. Here, at a predetermined position (a position closer to the primary port 12 than to the second chamber 35) of the peripheral wall portion 11 of the main body case 10, a third penetration connecting the inner surface 11a and the outer surface 11b A hole 19 is provided. This third through hole 19 is provided in order to prevent the valve body 31 from becoming immobile by sealing the space in which the biasing member 62 is accommodated. Further, as an example, a coil spring made of a metal material is used for the biasing member 62, but is not limited thereto.

According to this, the on-off valve 30 can be set to the so-called normally open state (state shown in FIG. 1). In addition, by setting the spring rate of the biasing member 62 (here, a coil spring), the pressure of the gas discharged from the exhaust port 18a of the secondary port 14, that is, the operating pressure of the external pneumatic device is set to a predetermined value. can

As described above, in the pressure regulating valve 1 according to the present embodiment, there is no pressure regulating mechanism for providing an operation dial, and by selecting the biasing member 62 (coil spring) assembled in advance at the time of manufacture, the secondary It is a mechanism for setting the pressure on the port 14 side. Therefore, in the conventional pressure-regulating valve as illustrated in patent document 1, the solution of the subject that the change of the set pressure which is not intended will arise just by making a slight contact with an operation dial is attained. In addition, reduction in adjustment man-hours, reduction in the number of parts, and simplification of the structure are also possible.

Here, in the opening/closing valve 30 of the pressure regulation valve 1 for performing pressure adjustment, the pressure receiving area on the side of the primary port 12 is the inner diameter of the seat surface 36a at the position where the first seal 34 abuts. , and the pressure receiving area on the side of the secondary port 14 is defined by the inner diameter of the main body case 10 at the position where the second seal 35 abuts.

As a result of intensive research conducted by the inventor of the present application regarding the above configuration, the ratio of the pressure receiving area on the side of the primary port 12 to the pressure receiving area on the side of the secondary port 14 in the valve body 31 is 1: By configuring so as to be 25 or more (more preferably 1:28 or more), when there is a change in the pressure of the gas flowing into the primary port 12 side, the pressure fluctuation of the gas discharged from the secondary port 14 side It became possible to suppress and found that high-precision pressure adjustment became possible. Here, measurement data in a comparative experiment of pressure characteristics for a conventional pressure regulator valve is shown in FIG. 5 (as an example, in the case of 1:28). The horizontal axis is the pressure of the gas flowing into the primary port 12 side, and the vertical axis is the pressure of the gas discharged from the secondary port 14 side. Data of the pressure regulating valve 1 according to the present embodiment is indicated by a solid line, and data of a conventional pressure regulating valve (Applicant's conventional product RVU6-6 type) is indicated by a broken line. As shown in the figure, as compared with the conventional pressure control valve, the pressure fluctuation of the gas flowing out from the secondary port 14 side with respect to the pressure fluctuation of the gas flowing into the primary port 12 side is extremely stable. A result that can be suppressed was obtained. In addition, although it is slightly inferior to the above characteristics, depending on the required specifications of the connected pneumatic equipment, the pressure fluctuation suppression effect is sufficiently obtained even if the ratio is lowered from the above so that the water pressure area ratio is 1:20 or more, Further miniaturization can also be achieved. On the other hand, when the realization of miniaturization (especially in the radial direction) is to be given priority over the effect of suppressing pressure fluctuations, the effect of miniaturization can be significantly improved by configuring the pressure-receiving area ratio to be 1:10 or more. you may get

As described above, in the pneumatic device connected to the secondary port 14 side, the operating pressure of the supply gas is set to a predetermined value in order to obtain an accurate operation. According to the pressure regulation valve 1 according to the present embodiment, the secondary Since the pressure of the gas supplied from the port 14 can be adjusted with high precision so that it may become a predetermined value with as little fluctuation|variation as possible, accurate and stable operation|movement of the pneumatic device to be connected is attained.

On the other hand, in the pneumatic device to which the pressure regulating valve 1 according to the present embodiment supplies gas, the gas pressure at the secondary port 14 side, that is, the inside of the pneumatic device, by reducing the gas pressure at the primary port 12 side. It has the characteristic that the operation in which the pressure (working pressure) is reduced is performed. As a configuration for realizing the operation, in this embodiment, between the inner surface 42a of the circumferential wall portion 42 of the guide member 40 and the outer surface 56b of the circumferential wall portion 56 of the flow path constituting member 50 . A second flow path 48 is provided in the third space 46 . More specifically, the second flow path 48 is formed in a state in which the on/off valve 30 is closed (that is, when the pressure of the gas on the secondary port 14 side reaches a predetermined value, etc., the primary port 12 is When the pressure of the gas on the side is equal to or less than the pressure of the gas on the side of the secondary port 14), the first through hole 54 of the flow path constituent member 50 and the second through hole 33 of the valve body 31 are . A check valve 60 is provided that allows.

With such a structure, it becomes possible to use the pressure regulation valve 1 for the purpose of adjusting the pressure of the gas supplied to actuators, such as an air cylinder, a vacuum generator, and pneumatic equipment, such as an air blow, to a predetermined value.

Then, with reference to FIG. 1, FIG. 2, the operation|movement of the pressure regulation valve 1 provided with the said structure is demonstrated.

First, at the start of use, the opening/closing valve 30 is in the "open" state as shown in FIG. Next, gas (compressed air as an example) is supplied from an external gas supply source (not shown) to the intake port 16a of the first pipe joint 16 of the primary port 12, and the gas is indicated by an arrow A As shown, the first flow path 20A in the flow path constituting member 50 and the first flow path 20B in the valve body 31 flow through, and the exhaust port 18a of the second pipe joint 18 of the secondary port 14 is ) from an external pneumatic device (not shown).

In addition, gas supply from the exhaust port 18a to the external pneumatic device is continuously performed, and the internal pressure (operating pressure) of the external pneumatic device rises to a predetermined value preset by the biasing member 62 . Thereby, a process in which the external pneumatic device operates with a predetermined internal pressure (operating pressure) is performed.

At this time, the pressure of the gas on the secondary port 14 side reaches a predetermined value, and the on-off valve 30 shifts to the "closed" state as shown in FIG. In this state, gas flow in the pressure regulation valve 1 does not occur.

Next, the pressure of the gas at the primary port 12 side is reduced. As a result, gas is supplied from the external pneumatic device to the exhaust port 18a of the second pipe joint 18 of the secondary port 14, and the gas is the first flow path in the valve body 31 as indicated by the arrow B. 20B flows, followed by flow from the second through hole 33 to the second flow passage 48 , and then from the first through hole 54 to the first flow passage 20A in the flow passage constituting member 50 . Thus, it is discharged from the intake port 16a of the first pipe joint 16 of the primary port 12 . Thereby, the internal pressure (operating pressure) of an external pneumatic device is pressure-reduced, and the preparation process for the next operation|movement is performed.

As described above, according to the disclosed pressure regulation valve, the pressure fluctuation of the gas supplied to the external pneumatic device is suppressed, and high-precision adjustment is possible. Moreover, since the structure which does not provide an operation dial is implement|achieved, it becomes possible to reduce the number of adjustment man-hours and to prevent that an unintentional change of a set pressure arises.

In addition, this invention is not limited to embodiment demonstrated above, It cannot be overemphasized that various changes are possible in the range which does not deviate from this invention. In particular, it is possible to apply also to gas supply to equipment other than the pneumatic equipment illustrated.

Claims (4)

A pressure regulating valve for adjusting the pressure of gas supplied to an external pneumatic device to a predetermined value,
A cylindrical body case,
a primary port provided at a first end of the body case and having an intake port connected to an external gas supply source;
a secondary port provided at the second end of the main body case and having an exhaust port connected to the external pneumatic device;
a first flow path communicating between the intake port and the exhaust port to pass the fluid;
an on/off valve provided in the middle of the first flow path to open and close the flow path;
a tubular guide member provided inside the main body case and having an outer diameter smaller than the inner diameter of the main body case;
a tubular flow path constituting member provided inside the guide member and having an outer diameter smaller than the inner diameter of the guide member;
The primary port and the secondary port are arranged so that the central axis of the intake port and the central axis of the exhaust port are on the same axis,
The flow path constituting member includes a first space constituting the first flow path at a radial center, a first through hole communicating the inside and the outside of the first space, and the on/off valve at an end close to the secondary port has a seating surface constituting the valve seat of
The opening/closing valve includes a small-diameter portion having a relatively small outer diameter is formed near the primary port and a large-diameter portion having a relatively large outer diameter is formed near the secondary port,
In addition, it has a valve body in which a first seal is externally wound on the small-diameter part and a second seal is externally wrapped on the large-diameter part,
The valve body has a second space constituting the first flow path at a radial center, and a second through hole communicating the inside and the outside of the second space, wherein the small-diameter portion is reciprocally movable to the guide member In addition, the large-diameter portion is disposed inside the main body case so as to be reciprocally moved, and the pressure-receiving area on the primary port side is defined by the inner diameter of the seating surface at the position where the first seal abuts; the pressure receiving area on the side of the car port is defined by the inner diameter of the main body case at a position where the second seal abuts;
a biasing member for biasing the valve body in a direction from the primary port toward the secondary port in parallel with the central axis of the intake port and the central axis of the exhaust port;
A third space between the inner surface of the circumferential wall portion of the guide member and the outer surface of the circumferential wall portion of the flow path constituting member is configured as a second flow passage,
The said 2nd flow path is comprised so that it may communicate with the said 1st flow path through the said 1st through-hole of the said flow path structural member and the said 2nd through-hole of the said valve body, and while it is the said primary from the said secondary port on the way. A pressure regulator valve, characterized in that it is provided with a check valve allowing only flow in the direction toward the port. According to claim 1,
The valve body is configured such that a ratio of a pressure receiving area on the primary port side to a pressure receiving area on the secondary port side is 1:10 or more. 3. The method of claim 1 or 2,
The biasing member is provided in a fourth space between the inner surface of the circumferential wall portion of the main body case and the outer surface of the circumferential wall portion of the guide member. 4. The method according to any one of claims 1 to 3,
and the external pneumatic device is an actuator, a vacuum generator, and an air blower whose internal pressure is reduced by depressurizing the primary port side.

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