JP2010138978A - Opening regulation structure for regulating valve, and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide opening regulation structure for a regulating valve capable of regulating finely a passing flow rate of a fluid guided from a primary side to a secondary side via a communication part, and a method of manufacturing the same. <P>SOLUTION: The communication part 5 for communicating one of the primary sides or the secondary sides of fluid flow passages 11, 12 with a cylindrical member 2 in a side wall part of a cylindrical member 2 comprises one or a plurality of through holes 5a penetrated through the side wall part of the cylindrical member 2, and a groove part 5b of nonpenetrated-through state formed recessedly along an inner wall part continuously from an opening portion of an inner wall part side of at least one of the through holes 5a, and the through hole 5b is arranged in a valve seat part 4 side of the through hole 5a, in a sliding direction with a valve element 1 slidably moving therealong. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a valve member slidable along the axial direction of a tubular member communicating with one of a primary side or a secondary side of a fluid flow path and a valve seat portion on which the valve body is seated. And a communication portion that communicates the other of the primary side or the secondary side of the fluid flow passage and the inside thereof is provided on the side wall portion of the tubular member, and the valve body is seated on the valve seat portion and the communication portion is provided. An opening adjustment structure of an adjustment valve that can adjust the valve opening degree by sliding the valve body between a closed position that closes a part and a fully open position that opens the communication part apart from the valve seat part, And it is related with the manufacturing method.

For example, as shown in FIG. 5, the conventional regulating valve is provided between the primary fluid flow passage 11 and the secondary fluid flow passage 12, and from the primary fluid flow passage 11 to the secondary fluid flow passage 12. It is known to adjust the flow rate of fluid to the fluid and the fluid pressure in the secondary fluid flow passage 12.
Specifically, the regulating valve is slidable in the axial direction of the tubular member 2 that communicates with the primary fluid flow passage 11 and the secondary fluid flow passage 12 through the inside thereof. A valve body 1 and a valve seat portion 4 on which the valve body 1 is seated at one axial end portion of the cylindrical member 2 are provided. For example, the primary side fluid flow passage 11 is connected to the inside of the tubular member 2 on the side where the valve seat portion 4 is disposed in the axial direction. A communication portion 5 that communicates the inside of the shaped member 2 and the secondary fluid flow passage 12 is provided. The valve body 1 is slidably provided between a closed position where the valve body 1 is seated on the valve seat portion 4 and a fully open position where the entire communication portion 5 is opened away from the valve seat portion 4. By adjusting the position of the valve body 1, the opening area of the communication portion 5 is adjusted to adjust the valve opening.
And in the conventional regulating valve, as shown in FIG. 5, the communication part 5 is comprised by the several through-hole formed in the side wall part of the cylindrical member 2. As shown in FIG. (See Patent Document 1).

JP 2007-271069 A

For example, when the regulating valve is used as a pressure regulating valve that regulates the secondary pressure of the fluid flow passage to the set pressure, the valve characteristics of the regulating valve (the relationship between the valve opening and the passing flow rate) are greatly affected by the pressure regulating performance Will be affected. In order to improve the pressure regulating performance, it is required that the flow rate of the fluid passing through the pressure regulating valve can be finely adjusted.
In the conventional regulating valve, as shown in FIG. 5, the communication portion 5 is composed of a plurality of through holes. For example, by increasing the number of through holes and reducing the diameter of each through hole. The flow rate of the fluid through the regulating valve can be finely adjusted. However, for example, in order to reduce the diameter of the through hole, it is necessary to process using a drill having a thin tip. In this case, problems such as breakage of the drill occur, so that there is a limit in processing to reduce the hole diameter. For this reason, it is difficult to finely adjust the flow rate of the fluid with the conventional regulating valve.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an opening adjustment structure for a regulating valve capable of finely adjusting the flow rate of fluid and a method for manufacturing the same.

In order to achieve the above object, a valve opening adjustment structure for a regulating valve according to the present invention is a cylindrical member that communicates with one of a primary side or a secondary side of a fluid flow passage and along its axial direction. A slidable valve body and a valve seat portion on which the valve body is seated, and a communication portion for communicating the other side of the primary or secondary side of the fluid flow passage with the inside of the side wall portion of the cylindrical member The valve body is slidably moved between a closed position where the valve body is seated on the valve seat portion and the communication portion is closed, and a fully open position where the communication portion is opened away from the valve seat portion. The opening adjustment structure of the adjustment valve that can freely adjust the valve opening,
The communication part is recessed along the inner wall part continuously from one or more through holes penetrating the side wall part of the tubular member, and an opening part on the inner wall part side of at least one of the through holes. A non-penetrating groove formed by lacking,
The groove portion is located at the valve seat portion side of the through hole in the sliding direction in which the valve body slides.

In the present invention, in particular, the communication portion is not simply constituted by only a through hole penetrating the side wall portion of the cylindrical member, but continuously from the opening portion on the inner wall portion side of the through hole in addition to the through hole. It is characterized in that it is configured by providing a non-penetrating groove that is recessed along the inner wall. Such a groove portion can be formed by cutting the inner wall portion with a processing tool such as a cutting tool having a thin tip diameter, so that it can be formed by relatively easy processing, such as the width, depth, and length of the groove portion. Can be adjusted with high accuracy.
Furthermore, the groove part of this invention is arrange | positioned rather than the through-hole in the sliding direction in which a valve body slides. As a result, in the regulating valve of the present invention, when the valve body is slid between the closed position and the fully opened position, the groove portion is present on the closed position side of the through hole. Therefore, the opening amount of only the groove portion adjusted with high accuracy in width, depth, length, etc. can be adjusted by sliding movement of the valve body, so that the flow rate of fluid can be finely adjusted. it can.
As a result, according to the present invention, it is possible to realize an opening adjustment structure of the adjusting valve that can finely adjust the flow rate of the fluid only by performing comparatively easy processing.
And when applying the opening adjustment structure of such an adjustment valve to the pressure regulation valve which regulates the secondary side pressure of a fluid flow path to a setting pressure, the function which adjusts a secondary side pressure finely is exhibited.

  The further characteristic structure of the opening adjustment structure of the adjusting valve which concerns on this invention exists in the point which the said groove part is formed so that the long axis may follow the said sliding direction of the said valve body.

  According to the above characteristic configuration, the opening amount of the groove portion that is opened with the sliding movement of the valve body is changed by a small amount by aligning the long axis of the groove portion that can be formed narrow along the sliding direction of the valve body. Can be made. Thereby, the flow rate of the fluid can be finely adjusted with higher accuracy.

In order to achieve the above object, a further characteristic configuration of the opening adjustment structure of the regulating valve according to the present invention is that a plurality of the through holes are provided at intervals in the circumferential direction of the side wall portion of the cylindrical member, The groove portions formed corresponding to at least two through holes are formed so as to overlap each other in the sliding direction.
Here, the term “overlapping each other in the sliding direction” means that there are overlapping portions (in the same position) when viewed in the sliding direction.

  By adjusting the opening amount of the single groove, the flow rate of the fluid can be finely adjusted. On the other hand, the rate of change of the flow rate of the fluid with respect to the sliding movement of the valve body is reduced, and the valve body It is conceivable that the responsiveness to the sliding movement is deteriorated. Therefore, according to the above-described characteristic configuration, the groove portions corresponding to at least two through holes are formed so as to overlap each other in the sliding direction of the valve body, so that the plurality of groove portions are formed along with the sliding movement of the valve body. The opening amount can be adjusted, and the rate of change of the flow rate of the fluid with respect to the sliding movement of the valve body can be increased. Therefore, the response to the sliding movement of the valve element can be improved while the flow rate of the fluid can be finely adjusted.

The characteristic structure of the manufacturing method of the opening adjustment structure of the regulating valve according to the present invention is that the cylindrical member communicating with one of the primary side or the secondary side of the fluid flow passage and the inside slides along the axial direction. A flexible valve body and a valve seat portion on which the valve body is seated are provided, and a communication portion is provided on the side wall portion of the cylindrical member to communicate the other of the primary side or the secondary side of the fluid flow passage with the inside thereof. The valve body is slidably moved between a closed position where the valve body is seated on the valve seat portion and the communication portion is closed, and a fully opened position where the communication portion is opened away from the valve seat portion. A method of manufacturing an opening adjustment structure of an adjustment valve that can freely adjust the valve opening,
As the communication part, a through hole that penetrates the side wall part of the cylindrical member, and a groove part in a non-penetrating state that is continuously recessed from the opening part on the inner wall part side of the through hole along the inner wall part Form the
The groove portion is arranged on the valve seat portion side with respect to the through hole in the sliding direction in which the valve body slides and moves,
About the said groove part, it exists in the point which adjusts and forms at least 1 among the width | variety, depth, or length.

According to the above-described characteristic configuration, as described in the characteristic configuration of the adjustment valve opening adjustment structure according to the present invention, the communication portion is not simply configured by only the through-hole penetrating the side wall portion of the cylindrical member. In addition to the through-hole, a non-penetrating groove portion that is continuously recessed from the opening portion on the inner wall side of the through-hole along the inner wall portion is designed. Therefore, the opening amount of only the groove portion whose width, depth, length, etc. are adjusted with high accuracy can be adjusted by sliding movement of the valve body, so that the flow rate of fluid can be finely adjusted. it can. As a result, the flow rate of the fluid can be finely adjusted by performing relatively easy processing.
Since the groove is formed by adjusting at least one of its width, depth, and length, the opening amount of the groove can be freely set from a small value to a large value. Thereby, the passage flow rate of the fluid can be adjusted accurately and more precisely.

To explain the opening adjustment structure of the regulating valve of the present invention, first, the overall configuration of a pressure regulating mechanism provided with a pressure regulator (hereinafter described as the main governor 13) having the opening adjusting structure of the regulating valve of the present invention; The operation of the pressure regulating mechanism will be described with reference to FIGS.
As shown in FIG. 1, the pressure regulating mechanism includes a main governor 13 that is a pressure regulator between a primary fluid flow passage 11 and a secondary fluid flow passage 12, and the primary fluid flow passage 11 and the secondary fluid flow passage 11. A pilot adjustment pipe 20 that communicates with the side fluid flow passage 12 is provided. When the city gas G (an example of a fluid flowing through the fluid flow passage) flows from the primary fluid flow passage 11 to the secondary fluid flow passage 12, the secondary gas flows in the secondary fluid flow passage 12 by the main governor 13. In a state where the side pressure is regulated to a predetermined value, the gas is supplied to the demand area of the city gas G on the downstream side of the secondary side fluid flow passage 12. In the present application, the main governor 13 adopts the opening adjustment structure of the regulating valve in the present application.

A pilot governor 22 and a throttle valve 21 are sequentially provided in the pilot adjustment pipe 20 in the flow direction of the city gas G from the primary side to the secondary side. The pilot governor 22 is a normally open diaphragm type governor that opens when the pressure detected by the pressure detector 22a decreases. The pressure detection unit 22 a is connected to the downstream side of the throttle valve 21 of the pilot adjustment pipe 20 via the pilot governor adjustment pipe 25. The valve body 22b is opened by the spring bias of the valve body 22b due to a decrease in the pressure detected by the pressure detector 22a, and the valve body 22b resists the spring bias by an increase of the pressure detected by the pressure detector 22a. The valve is configured to close.
As long as the throttle valve 21 has a function capable of limiting the flow rate of the city gas G to a predetermined amount, the throttle valve 21 may be configured by any type.

The main governor 13 described above is a normally closed diaphragm type governor. The diaphragm 13b is spring-biased from one side of the surface to the other side, and is provided so as to partition the pressure detection unit 13a on the other side from the one side. Furthermore, the valve body 1 interlocked with the diaphragm 13b is provided by the rod-shaped member 3 on the other side of the diaphragm 13b, and functions to adjust the opening degree of the main governor 13.
The pressure detector 13a is connected to an intermediate position between the pilot governor 22 and the throttle valve 21 of the pilot adjustment pipe 20 via the main governor adjustment pipe 24, and guides pressure from the pilot adjustment pipe 20 to the pressure detection section 13a. It is configured as follows. The main governor 13 is closed by spring bias when the pressure detected by the pressure detector 13a is less than a predetermined value, and spring biased when the pressure detected by the pressure detector 13a is equal to or greater than a predetermined value. The valve is opened against this.

Next, the operation of the pressure regulating mechanism will be described.
[Pressure regulation function for secondary side pressure drop]
When the pressure of the city gas G in the secondary side fluid flow passage 12 falls below a predetermined value, the pressure drop is guided to the pressure detector 22a of the pilot governor 22 through the pilot adjustment pipe 20 and the pilot governor adjustment pipe 25. . When the valve body 22b is spring-biased in the opening direction due to a drop in pressure detected by the pressure detector 22a of the pilot governor 22, the flow rate of the city gas G increases on the secondary side of the pilot governor 22. The city gas G on the upstream side of the throttle valve 21 increases in pressure. The pressure rise is guided to the pressure detector 13a of the main governor 13 through the main governor adjustment pipe 24. As a result, the regulating valve of the main governor 13 is opened, and the pressure regulating function for adjusting the pressure so that the pressure that has decreased on the secondary side rises works.

[Adjustment function for pressure rise on the secondary side]
When the pressure of the city gas G in the secondary fluid flow passage 12 rises above a predetermined value, the pressure rise is guided to the pressure detection unit 22a of the pilot governor 22 via the pilot adjustment pipe 20 and the pilot governor adjustment pipe 25. . When the valve body 22b is spring-biased in the closing direction by the pressure detected by the pressure detector 22a of the pilot governor 22, the flow rate of the city gas G decreases on the secondary side of the pilot governor 22. The city gas G on the upstream side of the throttle valve 21 drops in pressure. The pressure drop is guided to the pressure detector 13a of the main governor 13 through the main governor adjustment pipe 24. As a result, the regulating valve of the main governor 13 is closed, and the pressure regulating function for regulating the pressure so that the pressure that has risen on the secondary side is reduced works.

Next, the opening adjustment structure of the regulating valve, which is a characteristic configuration of the present invention, will be described with reference to FIGS.
As shown in FIGS. 2A to 2C, the main governor 13 having the adjustment valve opening adjustment structure according to the present invention is arranged in the cylinder 2 (an example of a cylindrical member) and in the axial direction of the cylinder 2. The valve body 1 is slidably movable along the cylinder 2, and the annular valve seat portion 4 is configured to seat the valve body 1 on one end side in the axial direction of the cylinder 2. In the center of the valve seat portion 4, an opening 4 b that communicates the primary side fluid flow passage 11 and the inside of the cylinder 2 is provided, and the side wall portion of the cylinder 2 has the secondary side fluid flow passage 12 and the cylinder 2. A communication portion 5 that communicates with the inside is provided.

As described above, the valve body 1 is connected to the diaphragm 13b of the main governor 13 by the rod-like member 3, and is configured to be driven in conjunction with the vertical movement of the diaphragm 13b.
The valve body 1 has an annular convex portion 1 a provided at the lower portion thereof along the inner wall portion of the cylinder 2, and is seated so that the annular convex portion 1 a contacts the annular rubber sheet 4 a of the valve seat portion 4. Then, the valve opening degree can be adjusted by slidingly moving between the closed position for closing the communicating portion 5 and the fully open position where the annular convex portion 1a is separated from the annular rubber sheet 4a and opens the entire communicating portion 5. It is configured.
When the valve body 1 is in the closed position, the circulation of the city gas G from the primary side to the secondary side is prohibited, and when the valve body 1 is in a position other than the closed position, the city gas G is primary through the communication portion 5. The flow from the side to the secondary side is allowed, and the position adjustment adjusts the flow rate of the city gas G guided from the primary side to the secondary side.

The communication part 5 is recessed along the inner wall part continuously from one or more through holes 5a penetrating the side wall part of the tubular member 2 and the opening part on the inner wall part side of at least one of the through holes 5a. It is comprised from the groove part 5b of the missing non-penetrating state. The groove portion 5b is located more than the valve seat portion in the sliding direction (the direction indicated by the white arrow in FIG. 2 (c)) in which the valve body 1 slides and moves along the axial direction of the cylinder 2. 4 is formed so that its long axis is along the sliding direction of the valve body 1. In the present embodiment, the width of the groove 5b is narrower than the diameter of the through hole 5a.
When the opening part of the groove part 5b opens with the sliding movement of the valve body 1, since the groove part 5b is continuously cut out from the opening part of the through hole 5a, the city gas G passes through the groove part 5b. Then, it is configured to flow through the through hole 5a and be guided from the primary side to the secondary side.
The groove part 5b can be formed by cutting with a cutting tool or the like, and the width, depth, and length of the groove part 5b can be increased with high machining accuracy as compared with a through hole provided by penetrating the side wall part of the cylinder 2 with a drill or the like. Can be formed. For this reason, for example, the through hole 5a processed by a drill has a minimum processing diameter that can be easily processed is about 2 mm to 3 mm, but the groove width of the groove portion 5b processed by the cutting tool can be easily reduced to 1 mm or less.

  When the valve element 1 is slidably moved from the closed position on the valve seat portion 4 side to the fully open position, the opening adjustment structure for the adjusting valve of the present invention is closer to the valve seat portion 4 side than the through hole 5a. Only the opening part of the provided groove 5b can be opened. When the valve body 1 is slid at a position where only the opening portion of the groove portion 5b is opened, the opening amount of the opening portion of the groove portion 5b accompanying the sliding movement of the valve body 1 is little by little by the narrow groove portion 5b. Can be varied. As a result, the passage flow rate of the city gas G guided from the primary side to the secondary side can be changed little by little, and the function of adjusting with high accuracy is exhibited.

As shown in FIG. 2 (b), a plurality of through holes 5 a can be provided at intervals in the circumferential direction (X direction) of the inner wall portion of the cylinder 2. And the groove part 5b formed corresponding to at least two through-holes 5a among them is formed so that it may mutually overlap in the sliding direction of the valve body 1. FIG. For example, in a position along the straight line X ₁ in FIG. 2 (b), it is arranged so that all of the grooves 5b illustrated overlap. When sliding movement the valve element 1 in the vicinity of the position along the straight line X ₁ to open the plurality of grooves 5b, city gas G derived from the primary side to the sliding movement of the valve body 1 to the secondary side The rate of change in the flow rate of the valve body 1 can be increased, and the function of adjusting in a highly responsive state with respect to the sliding direction of the valve body 1 is exhibited.

Next, the manufacturing method of the communication part 5 of this invention is demonstrated.
The communication portion 5 according to the present invention is a non-penetrating through the through hole forming step of forming the through hole 5a through the side wall portion of the cylinder 2 and the opening portion of the through hole 5a along the inner wall portion of the cylinder 2. A groove forming step of cutting out so as to be recessed in the state.
The through hole forming step is to penetrate the side wall of the cylinder 2 using, for example, a drill having a tip diameter of about 2 mm to 3 mm, and the drill has a thickness that does not break when penetrating the cylinder 2. Are preferably used.
In the groove forming step, a groove 5b is formed by cutting out the inner wall of the cylinder 2 in a non-penetrating state using a cutting tool having a small tip diameter. The groove 5b extends along the inner wall of the cylinder 2. Thus, it is formed to be continuous with the opening portion of the through hole 5a. In the groove forming step, the width, depth, and length of the groove 5b can be adjusted as appropriate by cutting or the like.

[Another embodiment]
(1) The width of the groove portion 5b of the communication portion 5 can be freely set.
For example, as shown in FIG. 3A, the width of the groove 5b is a width l ₁ narrower than the diameter of the through hole 5a in the sliding direction of the valve body 1 in a plan view from the inner wall of the cylinder 2. By doing so, the functions of the present application as described in the above embodiment can be sufficiently exhibited.
On the other hand, as shown in FIG. 3B, the width of the groove 5b is equal to or larger than the diameter of the through hole 5a in the sliding direction of the valve body 1 in a plan view from the inner wall of the cylinder 2. ₂ (l ₁ ≦ l ₂ ), the function of the present invention can be satisfactorily exhibited if the depth of the groove 5b is appropriately adjusted.

For example, as shown in FIGS. 4A and 4B, the depth of the groove 5b can be a shallow depth h ₁ or a deep depth h ₂ . In this manner, the flow rate of the fluid guided from the primary side to the secondary side via the groove 5b can be finely adjusted by appropriately changing the depth of the groove 5b.

(2)
In the embodiment shown in FIG. 2B, the shape of the through hole 5a is circular, but it can be various shapes such as an elliptical shape and a polygonal shape. The shape of the groove 5b is formed in a straight line shape, but may not be a separate straight line and may be bent.

(3)
In the embodiment shown in FIG. 2, the groove 5b is formed so that the sliding direction of the valve body 1 and the major axis thereof are in the same direction in a plan view from the inner wall side of the cylinder 2. The major axis of the groove 5b may face a direction different from the sliding direction of the valve body 1.

(4)
In the above embodiment, the communication portion 5 has an example in which one groove portion 5b is formed so as to correspond to each of all the through holes 5a. However, this need not be done separately. For example, a plurality of through holes 5a may be provided, and the groove portions 5b may be formed corresponding to some or all of the through holes 5a.

  An opening adjustment structure for an adjustment valve and a manufacturing method thereof according to the present invention include an opening adjustment structure for an adjustment valve capable of finely adjusting a flow rate of a fluid guided from a primary side to a secondary side via a communication portion, and It can be effectively used as the manufacturing method.

Schematic configuration diagram of a pressure regulating mechanism comprising a pressure regulator equipped with a regulating valve according to the present invention The figure which shows the valve opening adjustment structure of the regulating valve which concerns on this invention The enlarged view of the communication part which consists of a through-hole and a groove part concerning this invention Sectional view of the regulating valve according to the present invention The figure which shows the prior art example of the valve opening adjustment structure of a regulating valve

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Valve body 2: Cylinder 4: Valve seat part 5: Communication part 5a: Through-hole 5b: Groove part 11: Primary side fluid flow path 12: Secondary side fluid flow path G: City gas

Claims (4)

The tubular member communicating with one of the primary side or the secondary side of the fluid flow passage is provided with a valve body slidable along the axial direction and a valve seat portion on which the valve body is seated. A communication part is provided on the side wall part of the tubular member for communicating the other of the primary side or the secondary side of the fluid flow passage and the inside thereof, and the valve body is seated on the valve seat part to close the communication part. An opening adjustment structure of an adjustment valve that can adjust the valve opening by sliding the valve body between a position and a fully open position that opens the entire communication portion away from the valve seat portion,
The communication part is recessed along the inner wall part continuously from one or more through holes penetrating the side wall part of the cylindrical member and an opening part of the at least one through hole on the inner wall part side. A non-penetrating groove formed by lacking,
The groove portion is an opening adjustment structure of an adjustment valve that is disposed closer to the valve seat portion than the through hole in the sliding direction in which the valve body slides.   The opening adjustment structure of the adjusting valve according to claim 1, wherein the groove is formed so that a long axis thereof is along the sliding direction of the valve body.   A plurality of the through holes are provided at intervals in the circumferential direction of the side wall portion of the cylindrical member, and groove portions formed corresponding to at least two of the through holes overlap each other in the sliding direction. The opening adjustment structure of the adjusting valve according to claim 1 or 2, wherein the opening is adjusted. The tubular member communicating with one of the primary side or the secondary side of the fluid flow passage is provided with a valve body slidable along the axial direction and a valve seat portion on which the valve body is seated. A communication part is provided on the side wall part of the tubular member for communicating the other of the primary side or the secondary side of the fluid flow passage and the inside thereof, and the valve body is seated on the valve seat part to close the communication part. The manufacturing method of the opening adjustment structure of the adjustment valve is such that the valve body is slidably moved between the position and the fully open position that opens the entire communication part away from the valve seat part, and the valve opening degree is adjustable. And
As the communication part, a through hole that penetrates the side wall part of the cylindrical member, and a groove part in a non-penetrating state that is continuously recessed from the opening part on the inner wall part side of the through hole along the inner wall part Form the
The groove portion is arranged on the valve seat portion side with respect to the through hole in the sliding direction in which the valve body slides and moves,
About the said groove part, the manufacturing method of the opening degree adjustment structure of the adjustment valve formed by adjusting at least 1 among the width | variety, depth, or length.

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