JP2015132273A - Valve with orifice - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve with an orifice capable of easily confirming and removing foreign matter adhering to the orifice.SOLUTION: A valve with an orifice includes: a valve casing arranged in the halfway of a flow passage of fluid, and having an inner hole penetrating in a flow passage direction, and a cleaning hole communicating the inner hole with the outside space; a valve element disposed in the inner hole, and having an orifice as a through hole for measuring a flow rate of the fluid; and a displacement mechanism having a handle arranged in the outside of the valve casing, and displacing the valve element between a normal direction in which a penetration direction of the orifice is in parallel with the flow passage direction and a direction for cleaning in which the orifice faces the cleaning hole in accordance with operation of the handle.

Description

  The present invention relates to a valve with an orifice.

  Conventionally, in order to measure the flow rate of fluid (including gas and liquid) flowing through a pipe, an orifice plate in which an orifice that is a through hole is formed is arranged in the pipe. Pressure gauges are installed on the upstream side and downstream side of the piping through the orifice plate, and the fluid flow rate is measured from the differential pressure between the two.

Japanese Utility Model Publication No. 6-85992

If foreign matter adheres to the orifice which is a through hole, not only accurate flow rate measurement becomes difficult, but also a problem that the fluid does not flow in the first place occurs.
For example, conventionally, a coke oven gas obtained when carbon is carbonized in a coke oven is used as a burner combustion gas. If foreign matter (for example, tar that cannot be removed from the coke oven gas or dust in the piping) adheres to the orifice in the pipe through which the coke oven gas flows, the desired flow rate cannot be obtained and the burner Does not fulfill the function.
In such a case, after the gas flow is stopped as a whole, the piping near the orifice plate is disassembled, foreign matters in the orifice are removed, and the disassembled piping is assembled.

Patent Document 1 discloses a technique in which a pipe is provided with a “foreign matter removing plate having an insert inserted into each hole of a porous orifice valve by turning” ([Claim 1]). According to this technique, it is said that “foreign matter of the porous orifice valve can be removed easily and without water interruption” ([0004]).
However, even when the technique of Patent Document 1 is adopted, since the orifice plate ("Porous Orifice Valve" in Patent Document 1) is in the pipe, whether or not foreign matter has adhered to the orifice, and Whether or not the foreign matter has been removed by the foreign matter removing plate cannot be visually confirmed, and the pipe must be disassembled for confirmation.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a valve with an orifice capable of easily confirming and removing foreign matter adhering to the orifice.

  As a result of intensive investigations to achieve the above object, the present inventors have made the valve body in which the orifice is formed to be opposed to the cleaning hole formed in the valve box. As a result, it was found that foreign substances adhering to the orifice can be easily confirmed and removed, and the present invention has been completed.

That is, the present invention provides the following (1) to (4).
(1) A valve box that is disposed in the middle of the fluid flow path and has an internal hole that penetrates in the flow path direction, a cleaning hole that communicates the internal hole and the external space, and a fluid that is disposed in the internal hole. A valve body having an orifice, which is a through hole for measuring the flow rate of the valve, and a handle disposed outside the valve box, and the valve body is inserted in the direction of penetration of the orifice according to the operation of the handle. A valve with an orifice comprising: a normal direction parallel to the flow path direction; and a displacement mechanism that displaces the orifice in a cleaning direction opposite to the cleaning hole.
(2) The valve with an orifice according to the above (1), wherein two cleaning holes are provided at positions opposite to the valve box.
(3) A ball valve having a ball valve body as the valve body, wherein the ball valve body is hollowed so that a pair of opposed end faces communicate with each other, The valve with an orifice according to (1) or (2), wherein a disc-shaped orifice plate having the orifice at the center is provided.
(4) A ball valve having a ball valve body as the valve body, wherein the ball valve body has a reduced diameter structure in which an inner diameter is gradually reduced from a pair of opposed end faces toward the orifice formed at a central position. The valve with an orifice according to the above (1) or (2).

  ADVANTAGE OF THE INVENTION According to this invention, the valve | bulb with an orifice which can perform confirmation and removal of the foreign material adhering to an orifice easily can be provided.

1 is a schematic diagram showing piping equipment 1. FIG. 1 is an external view showing a ball valve 101 of a first embodiment in a state in which a ball valve body 151 is displaced in a normal direction. FIG. 3 is a horizontal sectional view of FIG. 2. FIG. 3 is a vertical sectional view of FIG. 2. It is an external view which shows the ball valve 101 of 1st Embodiment which is the state which the ball valve body 151 displaced to the direction for cleaning. FIG. 6 is a vertical sectional view of FIG. 5. It is a vertical sectional view showing ball valve 101 of a 2nd embodiment in the state where ball valve element 151 was displaced in the direction for cleaning.

First, an example in which the valve 101 with an orifice of the present invention is applied to the piping facility 1 will be described with reference to FIG.
In addition, in the following description, although the example of the piping installation 1 through which the coke oven gas which is a fluid distribute | circulates is shown, as a fluid, it is not limited to coke oven gas, The other gas or liquid may be used. Needless to say.

FIG. 1 is a schematic diagram showing a piping facility 1. The piping facility 1 has a piping 2. The pipe 2 forms a flow path for coke oven gas, which is a fluid, and the coke oven gas flows in the direction indicated by the arrow in FIG.
A plurality of burners 3 are provided in the middle of the pipe 2 separated by the pair of valves 5, and a flame 4 in which coke oven gas is burned is ejected from the tip of the burner 3. A valve 101 with an orifice for measuring the flow rate of coke oven gas is provided in the middle of the pipe 2 of the burner 3. That is, pressure gauges (not shown) are installed on the upstream side and downstream side of the pipe 2 of the burner 3 via the valve 101 with an orifice, and the flow rate of the coke oven gas is measured from the differential pressure between the two. It can be done.

By the way, in FIG. 1, the flame 4 of the 2nd burner 3 from the left is weaker than others. This is presumably because the flow rate of coke oven gas is lower than that of the other burners 3 due to foreign matter adhering to the orifice 152 described later of the valve 101 with the orifice. Here, the foreign matter is, for example, tar that could not be removed from the coke oven gas, dust that originally existed inside the pipe 2, and the like.
Conventionally, such adhesion of foreign matter could not be visually confirmed, and it was necessary to disassemble the pipe 2 in order to remove the foreign matter, but according to the present invention, it is easy to disassemble without disassembling. Check and remove foreign objects.

  Hereinafter, embodiments of the present invention will be described. However, the present invention is not limited to the embodiments described below.

[First Embodiment]
First, a first embodiment will be described with reference to FIGS. The first embodiment is an application example to a ball valve 101 having a ball valve body 151.
FIG. 2 is an external view showing the ball valve 101 of the first embodiment in a state where the ball valve body 151 is displaced in the normal direction. FIG. 3 is a horizontal sectional view of FIG. FIG. 4 is a vertical sectional view of FIG. In FIG. 3, some members are shown without being viewed in cross section.
Note that the state in which the ball valve body 151 is displaced in the normal direction means a state in which a penetrating direction of an orifice 152 (to be described later) is parallel to a flow path direction indicated by an arrow in the drawing.

The ball valve 101 is disposed in the middle of the pipe 2 (see FIG. 1) and connects the valve box 121 connected to the pipe 2, the ball valve body 151 that is a valve body in the valve box 121, and the ball valve body 151. A displacement mechanism (handle 181, valve stem 182, locking piece 183, stopper 184 a, stopper 184 b) and an O-ring 191 described later are mainly configured.
Note that the configuration and operation of the ball function of the ball valve 101 are not different from those of conventionally known ball valves.

As shown in FIGS. 3 and 4, an internal hole 122 penetrating in the flow path direction is formed inside the valve box 121.
As shown in FIG. 4, a cleaning hole 123 that allows the internal hole 122 and the external space to communicate with each other is formed through the wall constituting the valve box 121. Although details of the cleaning hole 123 will be described later, in the present embodiment, the pair of cleaning holes 123 are formed at opposing positions and are arranged in a direction orthogonal to the flow path direction. In the present embodiment, a cleaning pipe 124 that is a tubular member is formed on the outer surface of the valve box 121 so as to protrude from the cleaning hole 123. The cleaning pipe 124 may be provided with an openable / closable cock, a blind cap or the like (not shown) from the viewpoint of preventing fluid leakage.

  As shown in FIGS. 3 and 4, a ball valve body 151 is disposed in the internal hole 122 of the valve box 121. The ball valve body 151 is a spherical member whose interior is hollowed so that a pair of opposed end faces communicate with each other, and a disc-shaped orifice plate 153 is integrally formed at the center position inside the hollowed interior. . In the center of the orifice plate 153, an orifice 152 used for flow rate measurement is formed to penetrate. The hole diameter of the orifice 152 is not particularly limited, and is appropriately set according to a desired flow rate or the like.

  As shown in FIG. 3, an axial valve rod 182 orthogonal to the penetrating direction of the orifice 152 is fixedly connected to the ball valve body 151. The axial direction of the valve stem 182 is orthogonal to the penetrating direction (flow path direction) of the internal hole 122 and also orthogonal to the parallel direction of the pair of cleaning holes 123. One end of the valve stem 182 protrudes outside the valve box 121 and is fixedly connected to a handle 181 arranged outside the valve box 121. For this reason, the valve stem 182 is rotated according to the rotation operation of the handle 181, and the ball valve body 151 is also rotated in the direction around the axis of the valve stem 182 in conjunction with the rotation of the valve stem 182.

  As shown in FIG. 2, a stopper 184 a and a stopper 184 b are fixedly provided on the outer surface of the valve box 121 at a position that forms an angle of 90 degrees around the valve stem 182. A locking piece 183 is fixedly provided on the handle 181. In response to the turning operation of the handle 181, the locking piece 183 contacts the stopper 184a or the stopper 184b. Due to this contact, the handle 181 is restricted from being further rotated, and accordingly, the ball valve body 151 is also restricted from rotating.

  One stopper 184a is provided at a position where the ball valve body 151 is stopped in a normal direction. The other stopper 184b is provided at a position where the ball valve body 151 is stopped for cleaning as shown in FIGS.

FIG. 5 is an external view showing the ball valve 101 of the first embodiment in a state where the ball valve body 151 is displaced in the cleaning direction. 6 is a vertical sectional view of FIG.
The state in which the ball valve body 151 is displaced in the cleaning direction means a state in which the orifice 152 is opposed to the cleaning hole 123.

As shown in FIG. 6, in the present embodiment, the ball valve body 151 is displaced in the cleaning direction, whereby the inner hole 122 of the valve box 121 is closed by the outer wall surface of the ball valve body 151, Coke oven gas is damped.
At this time, a pair of O-rings 191 is provided in the gap between the inner wall surface of the valve box 121 forming the internal hole 122 and the ball valve body 151. The O-ring 191 further prevents the fluid from entering.

  As shown in FIG. 6, the orifice 152 is opposed to the cleaning hole 123 and the cleaning pipe 124 when the ball valve body 151 is displaced in the cleaning direction. Therefore, the state of the orifice 152 facing directly from the cleaning hole 123 can be directly observed, and a long member can be introduced from the cleaning hole 123 to reach the orifice 152.

  In such a configuration, in order to circulate the coke oven gas through the pipe 2 and eject the flame 4 from the burner 3, the handle 181 is rotated to bring the locking piece 183 into contact with the stopper 184a, The ball valve body 151 is positioned in the normal direction (FIGS. 2 to 4). In the normal direction, the coke oven gas that has reached the ball valve 101 passes through the orifice 152 and is burned at the tip of the burner 3 to become the flame 4. At this time, the flow rate of coke oven gas is measured using pressure gauges (not shown) arranged on the upstream and downstream sides of the ball valve 101 as necessary.

  By the way, if the distribution of the coke oven gas is continued, foreign matter adheres to the orifice 152 of the ball valve 101, and this foreign matter adheres to close the orifice 152, thereby reducing the flow rate of the coke oven gas and the desired flow rate. May not be satisfied. In this case, the flame 4 ejected from the burner 3 becomes weak and does not function as the burner 3.

Conventionally, the foreign matter adhering to the orifice 152 cannot be visually confirmed, and the piping 2 and the like have to be disassembled in order to remove the foreign matter.
However, in this embodiment, in such a case, the handle 181 is rotated, the locking piece 183 is brought into contact with the stopper 184b, and the ball valve body 151 is positioned for cleaning (FIGS. 5 to 6). ). By positioning the ball valve body 151 in the cleaning direction, the directly facing orifice 152 can be directly viewed from the cleaning hole 123, and adhesion of foreign matter can be confirmed.
If it is confirmed that foreign matter has adhered from the cleaning hole 123, for example, a long cleaning member (not shown) is introduced from one of the cleaning tubes 124 to reach the orifice 152 to which foreign matter has adhered. .

  At this time, if the tip of the cleaning member has a key shape, for example, the foreign matter can be scooped up by this tip to remove the foreign matter. In this case, only one cleaning hole 123 needs to be formed.

Further, as shown in FIG. 6, if the two cleaning holes 123 are formed at the relative positions, the tip of the cleaning member may be a simple bar shape instead of a key shape. In this case, a rod-shaped cleaning member can be introduced from the upper cleaning hole 123, and foreign matter adhering to the orifice 152 can be pushed down at the tip, and discharged from the lower cleaning hole 123 to the outside of the system.
When scooping up foreign matter from the single cleaning hole 123 formed, the foreign matter may be dropped when scooping up, and the foreign matter may remain in the system. However, when the two cleaning holes 123 are provided at the relative positions, the foreign matter can be easily discharged out of the system using only the rod-shaped cleaning member without requiring a work such as scooping up.
In addition, in order to push out foreign matter with a rod-shaped cleaning member and discharge it out of the system, it is preferable that the parallel direction of the two cleaning holes 123 is a vertical direction as shown in FIG.

[Second Embodiment]
Next, a second embodiment will be described based on FIG. Similarly to the first embodiment, the second embodiment is an application example to the ball valve 101. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is also omitted.
FIG. 7 is a vertical sectional view showing the ball valve 101 of the second embodiment in a state where the ball valve body 151 is displaced in the cleaning direction.
The main difference between the second embodiment and the first embodiment is the shape of the ball valve body 151. That is, the ball valve body 151 according to the second embodiment does not have the disc-shaped orifice plate 153 (see FIG. 6 and the like), but is directed from the pair of opposed end faces toward the orifice 152 positioned at the center. The diameter-reducing structure 154 is gradually reduced in inner diameter.

Also in the second embodiment, it is preferable that the two cleaning holes 123 are formed in relative positions, but the parallel direction of the two cleaning holes 123 is not the vertical direction, for example, as shown in FIG. Alternatively, it may be in the horizontal direction. When the parallel direction of the two cleaning holes 123 is a horizontal direction, in the second embodiment, when the foreign matter attached to the orifice 152 is pushed down at the tip of the cleaning member introduced from one cleaning hole 123, The foreign matter slides down the slope formed by the reduced diameter structure 154 and is discharged out of the system from the other cleaning hole 123.
At this time, if the inner diameter of the cleaning hole 123 is too small, the foreign matter that has slid down is blocked, and it may be difficult to be discharged out of the system. For this reason, at least the inner diameter of the cleaning hole 123 facing the end surface of the ball valve body 151 is preferably equal to or larger than the end surface of the ball valve body 151.

In the first and second embodiments, the application example to the ball valve is shown, but a so-called butterfly valve (not shown) may be used.
However, when the valve 101 with the orifice is a butterfly valve, the inner hole 122 is not blocked even if the valve body (not shown) having the orifice 152 is displaced in the above-described cleaning direction. If the internal hole 122 is not blocked, the coke oven gas, which is a fluid, cannot be stopped, which may hinder the cleaning operation or cause a safety problem.
For this reason, in the case of a butterfly valve, it may be necessary to displace the valve body in a cleaning direction after closing the pair of valves 5 that divide the pipe 2 of the burner 3. When the valve 5 is closed, the flow of the coke oven gas stops, so that all the flames 4 of the burner 3 branching from the pipe 2 partitioned by the pair of valves 5 are extinguished, which is not preferable.
On the other hand, in the ball valve 101 of the first and second embodiments, the internal hole 122 can be closed only by the rotation of the ball valve body 151, so that a desired ball valve can be obtained without closing the valve 5. Only 101 can be cleaned. In this case, the flame 4 of the burner 3 to which the ball valve 101 to be cleaned is connected disappears, but the flame 4 of the other burners 3 is maintained, which is preferable.

As described above, according to the present invention, the foreign matter adhering to the orifice 152 can be easily confirmed and removed.
Moreover, since the foreign substance removal plate of patent document 1 is installed in piping and is a movable type, there exists a possibility that a foreign substance removal plate itself may become unable to move by foreign material adhesion, and maintenance of a foreign substance removal plate itself is also required. . However, in the present invention, since there is no movable member for removing foreign matter from the orifice 152, maintenance is unnecessary.

1: Piping equipment 2: Piping 3: Burner 4: Flame 5: Valve 101: Ball valve (orifice valve)
121: Valve box 122: Internal hole 123: Cleaning hole 124: Cleaning tube 151 1: Ball valve body (valve body)
152: Orifice 153: Orifice plate 154: Reduced diameter structure 181: Handle (displacement mechanism)
182: Valve stem (displacement mechanism)
183: Locking piece (displacement mechanism)
184a: Stopper (displacement mechanism)
184b: Stopper (displacement mechanism)
191: O-ring

Claims (4)

An internal hole that is disposed in the middle of the fluid flow path and penetrates in the flow path direction; and a valve box having a cleaning hole that communicates the internal hole and the external space;
A valve body that is disposed in the internal hole and has an orifice that is a through hole for measuring the flow rate of the fluid;
A handle disposed outside the valve box, and in response to the operation of the handle, the valve body is in a normal direction in which the direction of penetration of the orifice is parallel to the flow path direction, and the orifice is used for the cleaning. A displacement mechanism that displaces the cleaning direction opposite the hole;
A valve with an orifice.   The valve with an orifice according to claim 1, wherein two cleaning holes are provided at opposite positions of the valve box. A ball valve having a ball valve body as the valve body,
The ball valve body is hollowed out so that a pair of opposing end faces communicate with each other, and a disc-shaped orifice plate having the orifice formed at the center is provided at the center of the hollowed inside. The valve with an orifice according to claim 1 or 2. A ball valve having a ball valve body as the valve body,
The valve with an orifice according to claim 1 or 2, wherein the ball valve body has a reduced diameter structure in which an inner diameter is gradually reduced from a pair of opposed end faces toward the orifice formed at a central position.

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