JP2018105390A - Flow regulating valve - Google Patents

Abstract

Provided is a Y-type valve that allows fluid to pass through the inside of the valve. A straight pipe section, a cross pipe section having a diameter larger than that of the straight pipe section having an internal space communicating with the flow path of the straight pipe section in a state of intersecting with the flow path of the straight pipe section, In order to adjust the opening degree of the flow path of the straight pipe part 2 provided in the cross pipe part 3, it has the valve body 4a which advances / retreats linearly. The second part 3b of the cross pipe part 3 is connected to the straight pipe part 2 at an intermediate part thereof, and a valve seat is attached to the tapered second part 3b located radially outside the inner wall surface of the straight pipe part 2. 3c is formed. When the valve body 4a is in the closed position in contact with the valve seat 3c, the valve body 4a closes the entire cross section of the straight pipe portion 2.

Description

  The present invention relates to a flow rate adjusting valve, and in particular, includes two pipe portions intersecting in a Y-shape, and a fluid flows into one pipe portion, and a valve body moves forward and backward within the other pipe portion, thereby the one of the above-mentioned one. The present invention relates to a flow regulating valve capable of opening and closing a pipe part.

  2. Description of the Related Art A flow regulating valve installed in a fluid transportation line used in a beverage production apparatus or the like is already known. It is desirable that the flow rate adjusting valve has a structure in which fluid flows linearly in the valve. An example of such a flow rate adjusting valve is a butterfly valve. However, since a butterfly valve normally uses a rubber packing for its seal part, if a butterfly valve is installed in the fluid transportation line, there is a possibility that the rubber odor will move from the seal part packing to the fluid. Yes, in that case, beverages etc. must be discarded.

  Further, a Y-type valve (angle valve) described in Patent Document 1 is known as a flow rate adjustment valve having a structure in which fluid flows linearly in the valve. As shown in FIG. 4, this Y-type valve 100 is composed of two pipe parts intersecting in a Y shape, one of which constitutes a straight pipe part 101, and fluid is illustrated by arrows in the internal space. It flows like a straight line. In the other pipe part (cross pipe part 102), the valve body 103 advances and retreats linearly inside, and the flow rate of the fluid flowing through the straight pipe part 101 is adjusted by the amount of advancement and retreat of the valve body 103. Inside the joint part of the straight pipe part 101 and the cross pipe part 102, a valve seat 104 is formed so as to protrude into the flow path so that the valve body 103 moves straightly and abuts its end face. The valve body 103 closes the straight pipe portion 101 when the valve body 103 moves straight forward and its end face comes into contact with the valve seat 104.

JP-A-8-61553

  Regarding the internal structure of the Y-type valve 100, the pressure loss when the fluid passes at the time of opening the valve is suppressed as much as possible, and each part in the valve (strictly speaking, the fluid is used when cleaning the transportation line provided with the valve). It is required to have a structure that can satisfactorily clean the portion through which the gas passes. On the other hand, in the conventional flow rate adjustment valve as shown in FIG. 4, when the valve seat 104 is formed to protrude into the fluid flow path, the flow path is narrowed by that amount. Loss increases. In addition, during cleaning, eddy currents are generated in the cleaning water around the valve seat 104, and as a result, the cleaning performance may be deteriorated around the valve seat 104.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a flow rate adjustment valve that allows fluid to pass through the inside of the valve satisfactorily.

  According to the flow regulating valve of the present invention, the subject has a straight pipe part that forms a fluid flow path, and an internal space that communicates with the flow path of the straight pipe part in a state of intersecting the straight pipe part. A crossing pipe part, a valve body that moves forward and backward in the internal space of the crossing pipe part to adjust the opening of the flow path, and when the valve body reaches a closed position that closes the flow path of the straight pipe part The valve seat is in contact with the end face of the valve body, and the valve seat is solved by being located on the radially outer side of the straight pipe portion.

  In the flow control valve of the present invention configured as described above, the portion of the inner wall surface of the cross pipe portion that forms the valve seat has a diameter of the straight pipe portion in the radial direction of the straight pipe portion through which fluid flows. It is located outside in the direction. That is, in the flow rate adjusting valve of the present invention, the valve seat does not exist inside the fluid flow path, so that the flow of fluid is not obstructed by the valve seat, and the fluid flows well in the flow path (specifically (In other words, the pressure loss is suppressed as much as possible).

  In the above flow rate adjusting valve, it is preferable that the straight pipe portion and the cross pipe portion intersect with each other at an intersection angle of 30 to 60 degrees. With the above configuration, since the resistance to the fluid flowing through the straight pipe portion is relatively small, the valve body can be smoothly advanced and retracted even if the power source for moving the valve body forward and backward is small. Since the source can be small, the dimensions of the entire regulating valve can be reduced in combination with the fact that the straight pipe portion and the cross pipe portion can be arranged in a Y shape.

Further, in the above flow regulating valve, the intersecting pipe portion is larger in diameter than the straight pipe portion and is reduced in diameter at the intersecting portion with the straight pipe portion, and the valve seat It is preferable that it is formed in the reduced diameter portion of the tube portion. If it is said structure, it will become possible to implement | achieve a comparatively simple structure as a structure which provides a valve seat.

  Moreover, in the above flow rate adjusting valve, it is still more preferable that the valve body is made of Teflon (registered trademark). With the above configuration, since the valve body is made of Teflon (registered trademark), the flow regulating valve of the present invention is also used in a fluid transportation line that requires a relatively high level of hygiene management, such as beverages, foods, and liquid pharmaceuticals. Can be used.

  According to the flow rate adjusting valve of the present invention, the fluid passes through the valve well, so that it is possible to transport the fluid while suppressing the pressure loss as much as possible. Further, when the inside of the pipe provided with the flow rate adjusting valve of the present invention is washed, each part of the valve can be washed well.

It is an external view of the flow regulating valve concerning one embodiment of the present invention. It is sectional drawing of the flow regulating valve concerning one Embodiment of this invention. It is sectional drawing of the flow regulating valve concerning other embodiment of this invention. It is a figure which shows the structure of the conventional Y-type valve.

  Hereinafter, a flow control valve according to an embodiment of the present invention will be described with reference to FIGS. In addition, embodiment described below is for making an understanding of this invention easy, and does not limit this invention. That is, the present invention can be changed and improved without departing from the gist thereof, and the present invention includes its equivalents.

  The flow regulating valve according to the present embodiment is a Y-type valve 1 and has the appearance shown in FIG. The Y-type valve 1 is a metal valve formed by casting, forging, machining, or the like. The Y-type valve 1 includes a cylindrical straight pipe portion 2 and a cylindrical cross pipe portion 3 having a diameter larger than that of the straight pipe portion 2 as shown in FIG. The straight pipe portion 2 has a straight cylindrical shape, and a fluid flows through the inside thereof. That is, the straight pipe portion 2 is a portion that forms a fluid flow path in the Y-type valve 1. A main line (not shown) of a fluid transport line is connected to both ends of the straight pipe portion 2.

  The intersecting pipe part 3 is a hollow part, and its internal space communicates with the flow path in a state of intersecting with the flow path formed in the straight pipe part 2. Here, in the embodiment shown in the figure, the straight pipe portion 2 and the cross pipe portion 3 intersect with each other at an angle of about 45 degrees, but this intersection angle is desirably 30 to 60 degrees, and more desirably 40 to 40 degrees. It should be in the range of 50 degrees.

  One end in the extending direction of the cross tube portion 3 is an open end, and an opening / closing sensor (not shown) and the like are arranged in addition to a driving means (not shown) at a position facing the open end. Moreover, the movable part 4 of the Y-type valve 1 is accommodated in the internal space of the cross pipe part 3 as shown in FIG. As shown in FIG. 2, the movable portion 4 includes a valve body 4a having a thin cylindrical shape, and a sleeve portion 4b continuously provided on the back side of the valve body 4a (upper right side in the drawing). Further, the valve body 4a has a truncated cone portion 4a 'on the front surface side (lower left side in the figure). Each part of the movable part 4 including these is integrally molded by Teflon (registered trademark). However, the material of the movable portion 4 is not particularly limited, and may be a material other than Teflon (registered trademark).

  The valve body 4a adjusts the opening degree of the flow path of the fluid formed in the straight pipe part 2 by moving forward and backward linearly. The sleeve portion 4b is an elongated cylindrical support rod. And by the drive means, the movable part 4 moves forward and backward in a straight line along the axial direction in the internal space of the cross pipe part 3. Thereby, the valve body 4a can reciprocate between an open position and a closed position (position of FIG. 2).

  A valve seat 3c is formed on the outer side of the straight pipe part 2, that is, the cross pipe part 3 so that the outer peripheral cone part of the truncated cone part 4a 'of the valve body 4a is in surface contact in the closed position. In a state where the truncated cone portion 4a 'of the valve body 4a is in contact with the valve seat 3c, the valve body 4a closes the flow path in the 3c straight pipe portion 2. Further, in the present embodiment, the valve seat 3 c is configured by the inner wall surface of the cross pipe portion 3. Furthermore, in this embodiment, the part which comprises the valve seat 3c among the inner wall surfaces of the cross pipe part 3 is located inside the inner wall surface of the straight pipe part 2 in the radial direction of the straight pipe part 2. Absent. With such a configuration, the pressure loss in the straight pipe portion 2, which has been a problem in the configuration in which the valve seat 3 c is provided inside the inner wall surface of the straight pipe portion 2 in the radial direction of the straight pipe portion 2, is caused. Absent. Further, when the valve seat 3c is provided on the inner side of the inner wall surface of the straight pipe portion 2, a fluid pool generated around the valve seat 3c does not occur.

  Hereinafter, the configuration employed in the present embodiment in order to obtain the above effect, particularly the configuration of the cross pipe portion 3 will be described in more detail. As shown in FIGS. 1 and 2, the cross pipe portion 3 includes a large-diameter cylindrical first portion 3 a and a conical second portion 3 b connected to the first portion 3 a. The aforementioned first movable portion 4 is accommodated in the internal space of the first portion 3a.

  The diameter of the second portion 3b is reduced as the distance from the first portion 3a increases. Further, the inner wall surface of the second portion 3b (the surface surrounding the inner space of the cross tube portion 3) has a tapered shape like the outer peripheral surface of the second portion 3b, and the diameter decreases as the distance from the first portion 3a increases. Yes. And the 2nd part 3b of the cross pipe part 3 is connected with the straight pipe part 2 in the intermediate part, The said valve seat 3c is the said diameter reduction located in the radial direction outer side of the inner wall face of the straight pipe part 2. It is formed in the taper-shaped second part 3b which is a part.

When the valve body 4a is in the closed position in contact with the valve seat 3c, the valve body 4a closes the entire cross section of the straight pipe portion 2.
As described above, the adjacent portion 3 c as the valve seat 3 c does not exist inside the inner wall surface of the straight pipe portion 2. For this reason, when the fluid flows into the straight pipe portion 2 when the valve is opened, the fluid flows well without being blocked by the valve seat 3c. Further, when the inside of the straight pipe portion 2 is cleaned, the valve seat 3c does not protrude inward, so that it is possible to clean well without being influenced by the valve seat 3c.

  FIG. 3 shows a flow rate regulating valve according to another embodiment of the present invention. Unlike the above-described embodiment, this embodiment is flush with the lower portion of the straight pipe portion 2 (the side opposite to the portion to which the intersecting pipe portion 3 is connected) in FIG. Even if it exists in such a form, the effect similar to embodiment mentioned above can be acquired.

1 Y-type valve (flow adjustment valve)
2 Straight pipe part 3 Cross pipe part 3a First part 3b Second part 3c Adjacent part 3c Valve seat 4 Movable part 4a Valve body 4b Sleeve part 100 Y-type valve 101 Straight pipe part 102 Cross pipe part 103 Valve body 104 Valve seat

Claims (4)

A straight pipe section that forms a fluid flow path;
A cross pipe portion having an internal space communicating with the flow path of the straight pipe portion in a state of crossing the straight pipe portion;
A valve body that moves back and forth in the internal space of the cross pipe portion to adjust the opening of the flow path;
A valve seat that contacts the end face of the valve body when the valve body reaches a closed position that closes the flow path of the straight pipe portion;
The said valve seat is located in the radial direction outer side of the said straight pipe part, The flow regulating valve characterized by the above-mentioned. The flow regulating valve according to claim 1, wherein the straight pipe portion and the cross pipe portion intersect with each other at an intersection angle of 30 to 60 degrees.   The cross pipe portion has a diameter larger than that of the straight pipe portion and is reduced in diameter at the cross portion with the straight pipe portion, and the valve seat is formed in a reduced diameter portion of the cross pipe portion. The flow regulating valve according to claim 1, wherein the flow regulating valve is provided.   The flow regulating valve according to any one of claims 1 to 3, wherein the valve body is made of Teflon (registered trademark).