WO2016199628A1

WO2016199628A1 - Valve seat and drain trap

Info

Publication number: WO2016199628A1
Application number: PCT/JP2016/066122
Authority: WO
Inventors: 小池正
Original assignee: 株式会社テイエルブイ
Priority date: 2015-06-09
Filing date: 2016-06-01
Publication date: 2016-12-15
Also published as: JP6371477B2; JPWO2016199628A1

Abstract

Provided is a valve seat with which the outflow speed of drainage can easily be adjusted. This valve seat (20) is equipped with a cylindrical member (21) and an annular member (25). The cylindrical member (21) has a valve hole (23) which is opened and closed by a valve body, and into which drainage flows. The annular member (25) is fitted in the side wall of the cylindrical member (21), thereby connecting the interior and the exterior of the cylindrical member (21), and forming an outflow hole for the drainage.

Description

Valve seat and drain trap

This application relates to a valve seat and a drain trap having the same.

For example, as disclosed in Patent Document 1, a drain trap (steam trap) having a valve seat is known. This drain trap is provided with a drain storage chamber (valve chamber), a valve seat, and a fluid discharge passage (exit) in the casing. The valve seat is formed in a tubular shape, and is provided with a valve hole for communicating the tubular interior with the storage chamber, and a communication hole for communicating the tubular interior with the discharge passage. In the drain trap, a valve body (float) provided in the storage chamber is separated from and seated on the valve seat, whereby the valve hole of the valve seat is opened and closed. When the valve hole is opened, the drain of the storage chamber flows into the cylindrical interior from the valve hole and flows out from the communication hole to the discharge passage. Thus, the drain in the storage chamber flows through the valve seat to the discharge passage and is discharged outside.

JP 2002-276893 A

By the way, in the drain trap as described above, there is a possibility that the drain wall flowing out from the valve seat may be eroded (so-called erosion occurs) by repeatedly colliding with or contacting the wall surface of the discharge passage. In order to suppress the erosion, the direction and size of the communication hole of the valve seat are designed so that the drain outflow direction and the outflow speed of the drain from the valve seat to the discharge passage are appropriate. For example, the direction of the communication hole of the valve seat is determined so that the draining direction of the drain is the same as the passage direction of the discharge passage. In addition, the size of the communication hole is determined so that the drain outflow speed is equal to or higher than a predetermined value. That is, if the drain outflow rate is slow, the drain outflowing from the communication hole greatly expands and collides with the wall surface of the discharge passage. Therefore, the drain outflow rate is set to a predetermined value or more. Usually, the smaller the communication hole, the faster the drain outflow rate.

However, at the actual installation site, the drain outflow speed may fall below a predetermined value due to changes or errors in the operating conditions and installation posture. In that case, the valve seat had to be replaced with one having an appropriate size of the communication hole, which required much time and effort.

The technology disclosed in the present application has been made in view of such circumstances, and an object thereof is to provide a valve seat capable of easily adjusting the outflow speed of a fluid and a drain trap including the valve seat. is there.

In order to achieve the above object, the valve seat of the present application is a member (annular member) that forms a member (cylindrical member) through which the valve body is detached and seated and fluid flows in, and an outflow hole through which the fluid that flows in flows out. And (members) are configured as separate members.

Specifically, the valve seat of the present application includes a cylindrical member and an annular member. The cylindrical member is opened and closed by a valve body and has a valve hole into which a fluid flows. The annular member is fitted into the side wall of the cylindrical member to allow communication between the inside and the outside of the cylindrical member and constitutes the fluid outflow hole.

Further, the drain trap of the present application includes a drain storage chamber, a valve body disposed in the storage chamber, the above-described valve seat on which the valve body is separated and seated, and a drain of the storage chamber via the valve seat. And a discharge passage for discharging. And in the said valve seat, the valve hole of the said cylindrical member is opened and closed by the seat of the said valve body, and the drain of the said storage chamber flows in as a fluid. In the valve seat, the annular member communicates the inside of the cylindrical member with the discharge passage, and constitutes an outlet hole for the drain as a fluid.

As described above, in the valve seat of the present application, the valve hole of the cylindrical member is opened and closed by the valve body. When the valve hole is opened, the fluid flows into the cylindrical member through the valve hole and flows out from the outflow hole. And according to the valve seat of this application, it was made to comprise as an above-mentioned outflow hole the annular member which fits in the side wall of a cylindrical member, and connects the inside and outside of a cylindrical member. That is, according to the valve seat of the present application, an annular member which is a member different from the cylindrical member is fitted into the cylindrical member, and the opening of the annular member is used as the outflow hole. With this configuration, the outflow speed of the fluid can be easily adjusted by replacing the annular member with another having the same outer diameter but different inner diameter (opening diameter). That is, when the ring member is replaced with an annular member having a small inner diameter, the outflow rate is increased, and when the ring member is replaced with an annular member having a large inner diameter, the outflow rate is decreased. Further, by preparing in advance a plurality of annular members having the same outer diameter and different inner diameters, the outflow speed can be adjusted quickly.

FIG. 1 is a cross-sectional view illustrating a schematic configuration of a drain trap according to an embodiment. FIG. 2 is an enlarged cross-sectional view illustrating a schematic configuration of the valve seat according to the embodiment. FIG. 3 is a cross-sectional view illustrating a main part of a drain trap according to a modification of the embodiment. 4 is a cross-sectional view taken along line XX in FIG.

Hereinafter, embodiments of the present application will be described with reference to the drawings. Note that the following embodiments are essentially preferable examples, and are not intended to limit the scope of the technology disclosed in the present application, applications thereof, or uses thereof.

The drain trap 1 of the present embodiment constitutes a free-float type steam trap, for example, is provided in a steam system, and drain (condensate) generated by condensation of steam is stored and automatically discharged. As shown in FIG. 1, the drain trap 1 includes a casing 10 that is a sealed container, a float 16, a valve seat 20, and a discharge mechanism 30.

The casing 10 has a lid portion 12 fastened to a main body portion 11 with bolts, and a drain storage chamber 13 is formed therein. The main body 11 has a drain inflow passage 14 and a discharge passage 15. A screen 17 and a float cover 18 are provided above the storage chamber 13. Although not shown, the float cover 18 has an opening. The inflow passage 14 communicates with the upper portion of the storage chamber 13, and the drain of the inflow passage 14 passes through the openings of the screen 17 and the float cover 18 and is stored in the storage chamber 13. The float 16 is formed in a hollow sphere and is provided in the storage chamber 13 in a free state. The float 16 rises and falls according to the drain water level of the storage chamber 13 and constitutes a valve body that is attached to and detached from a valve seat 20 described later. The discharge passage 15 has a vertical portion 15a and a horizontal portion 15b that are continuous with each other. The vertical portion 15a communicates with the storage chamber 13 via the valve seat 20, and the horizontal portion 15b communicates with the outside.

The valve seat 20 is positioned below the storage chamber 13 and is fixed by being pressed against the wall of the storage chamber 13 by a plug 29. The valve seat 20 allows the storage chamber 13 and the discharge passage 15 to communicate with each other and discharges the drain of the storage chamber 13 to the discharge passage 15. The detailed configuration of the valve seat 20 will be described later.

The discharge mechanism 30 is provided in the upper part of the storage chamber 13 and is a discharge mechanism for low-temperature fluid that discharges low-temperature air or low-temperature drain in the storage chamber 13 to the discharge passage 34. The discharge mechanism 30 includes a valve seat 31 and a temperature responsive member 33. A discharge hole 32 communicating with the discharge passage 34 is formed in the valve seat 31, and the discharge hole 32 is opened and closed by a temperature responsive member 33. The temperature responsive member 33 is a substantially disc-shaped sealed capsule, and a thin plate diaphragm and a thermal expansion / contraction liquid are accommodated therein, although not shown. The discharge passage 34 is formed in the lid portion 12 and is connected to the discharge passage 15 through the communication passage 35. In the discharge mechanism 30, when the temperature in the storage chamber 13 increases, the temperature responsive member 33 expands and closes the discharge hole 32. When the temperature in the storage chamber 13 decreases, the temperature responsive member 33 contracts to open the discharge hole 32, and the drain and air in the storage chamber 13 are discharged from the discharge hole 32 to the discharge passage 34.

<Structure of valve seat>
As shown in FIG. 2, the valve seat 20 includes a cylindrical member 21 and an annular member 25. The cylindrical member 21 is formed in a cylindrical shape having a valve hole 23 at one end (the left end portion in FIG. 2), and constitutes the main body of the valve seat 20. The other end of the cylindrical member 21 is closed. The inside of the cylindrical member 21 serves as a drain discharge path 22. In the tubular member 21, the valve hole 23 is an opening that allows the discharge path 22 and the storage chamber 13 to communicate with each other and the drain of the storage chamber 13 flows into the discharge path 22. The valve hole 23 is opened and closed when the float 16 is seated at the tip of the cylindrical member 21.

The annular member 25 is fitted and attached to the side wall of the cylindrical member 21. Specifically, an insertion hole 24 is formed through the side wall of the cylindrical member 21, and an annular member 25 is inserted into (inserted into) the insertion hole 24. The annular member 25 communicates the inside and outside of the tubular member 21 (that is, the discharge passage 22 and the discharge passage 15 of the tubular member 21) through the opening 26. That is, the annular member 25 forms a drain outlet hole through which the drain of the discharge path 22 of the cylindrical member 21 flows out to the discharge passage 15 (vertical portion 15a).

The annular member 25 is fitted into the side wall 13 so that the tip 27 (outer end) protrudes outward from the side wall of the cylindrical member 21. Moreover, as shown in FIG. 1, the annular member 25 is provided so that the central axis A extends in the passage direction of the discharge passage 15 (vertical portion 15a). That is, the central axis A of the opening 26 of the annular member 25 is substantially coaxial with the passage axis of the vertical portion 15a.

In the drain trap 1 described above, when the drain water level in the storage chamber 13 is low, the float 16 is seated on the tubular member 21 of the valve seat 20 and the valve hole 23 is closed (state shown in FIG. 1). When the drain water level in the storage chamber 13 rises, the float 16 rises and separates from the tubular member 21 of the valve seat 20, and the valve hole 23 opens. Then, the drain in the storage chamber 13 flows from the valve hole 23 into the discharge path 22 of the cylindrical member 21. The drain that has flowed into the discharge passage 22 flows out from the opening 26 of the annular member 25 to the discharge passage 15 (vertical portion 15a) and is discharged to the outside.

As described above, in the valve seat 20 of the above-described embodiment, the annular member 25 that is fitted into the side wall of the cylindrical member 21 to communicate the inside and the outside of the cylindrical member 21 is configured as a drain outflow hole. That is, according to the valve seat 20 of the above-described embodiment, the annular member 25 which is a member different from the tubular member 21 is fitted into the tubular member 21, and the opening 26 of the annular member 25 is used as the outflow hole. With this configuration, the outflow speed of the drain (fluid) can be easily adjusted (changed) by replacing the annular member 25 with another member having the same outer diameter D2 but different inner diameter D3 (opening diameter).

In the valve seat 20, the drain outflow speed is determined by the ratio of the inner diameter D 3 of the annular member 25 to the hole diameter D 1 of the valve hole 23. That is, when the inner diameter D3 of the annular member 25 is reduced, the drain outflow speed is increased, and when the inner diameter D3 of the annular member 25 is increased, the drain outflow speed is decreased. In the above embodiment, since the annular member 25 is a separate member, the drain flow rate can be easily adjusted (changed) simply by replacing the annular member 25 with another annular member 25 having a different inner diameter D3. If the drain outflow rate is slow, the drain outflowing from the annular member 25 may spread and collide with the wall surface of the discharge passage 15 to cause erosion of the wall surface. However, in the above embodiment, the drain outflow rate is high. The occurrence of erosion can be suppressed by adjusting the outflow speed so as to be.

In the above embodiment, the outflow speed can be adjusted easily and quickly by preparing in advance a plurality of annular members 25 having the same outer diameter D2 and different inner diameters D3.

In the above embodiment, since the annular member 25 is provided so that the tip 27 protrudes from the side wall of the cylindrical member 21, the flow of drain flowing out from the annular member 25 can be rectified. Thereby, the rectilinearity of the drain which flows out from the annular member 25 can be improved. That is, the spreading of the drain immediately after flowing out of the annular member 25 can be suppressed. Therefore, the occurrence of erosion in the discharge passage 15 can be further suppressed.

In the above embodiment, since the annular member 25 is provided so that the central axis A extends in the passage direction of the discharge passage 15 (vertical portion 15a), the drain is caused to flow out from the annular member 25 along the discharge passage 15. Can do. Thereby, it is possible to further suppress the drain from colliding with the wall surface of the discharge passage 15.

Moreover, in the said embodiment, the outflow direction of the drain (fluid) from the annular member 25 is easily adjusted (changed) by replacing | exchanging the annular member 25 with another with the same outer diameter D2 and the direction of the center axis A differing. )can do. Thus, by making it possible to adjust the drain outflow speed and outflow direction, it is possible to effectively take measures to suppress erosion.

(Modification of the embodiment)
A modification of the above embodiment will be described with reference to FIGS. In this modification, the configurations of the valve seat and the discharge passage are changed in the drain trap 1 of the above embodiment. Here, a different point from the said embodiment is demonstrated.

As shown in FIG. 3, the valve seat 40 of this modification includes a cylindrical member 41 and an annular member 45 as in the above embodiment. The cylindrical member 41 is formed in a cylindrical shape having a valve hole 43 at one end (left end portion in FIG. 3). The other end of the cylindrical member 41 is closed by a closing member 41a. The inside of the cylindrical member 41 is a drain discharge path 42, and the discharge path 42 and the storage chamber 13 communicate with each other through a valve hole 43. The annular member 45 is fitted in and attached to an insertion hole 44 formed in the side wall of the tubular member 41. The annular member 45 allows the discharge passage 42 and the discharge passage 15 to communicate with each other through the opening 46.

Also, the annular member 45 has a tip 47 (outer end) protruding outward from the side wall of the tubular member 41 as in the above embodiment. The annular member 45 is provided such that the central axis C extends in the passage direction of the discharge passage 15 (vertical portion 15a). That is, the central axis C of the opening 46 of the annular member 45 is substantially coaxial with the passage axis of the vertical portion 15a.

And the annular member 45 of this modification has a rear end 48 (inner end) protruding from the side wall of the tubular member 41. Specifically, in the annular member 45, the rear end 48 located on the valve hole 43 side (left side in FIG. 3) in the central axis B direction (axial direction) of the tubular member 41 is inward from the sidewall of the tubular member 41. It protrudes. The central axis C of the annular member 45 is inclined toward the valve hole 43 with respect to the direction orthogonal to the central axis B of the tubular member 41.

Thus, in this modification, the rear end 48 on the valve hole 43 side of the annular member 45 protrudes from the side wall of the tubular member 41, so that the drain of the discharge path 42, particularly the radial direction (center of the discharge path 42). The drain flowing on the annular member 45 side in the direction orthogonal to the axis B flows around the rear end 48 of the annular member 45 and flows into the opening 46 (see the white arrow shown in FIG. 3). Therefore, the drain of the discharge path 42 can be caused to flow along the central axis C into the opening 46 of the annular member 45. Thereby, the straight advanceability of the drain flowing out from the annular member 45 can be further improved, and the occurrence of erosion in the discharge passage 15 can be further suppressed.

As shown in FIG. 4, the discharge passage 15 of the present modification is provided with a recess 11 b for restricting the rotational operation of the valve seat 40 when the valve seat 40 is assembled to the main body 11 of the casing 10. ing. Specifically, the recess 11b is formed on the inner surface of the passage wall 11a of the discharge passage 15 (vertical portion 15a) where the annular member 45 is located. The recessed part 11b is formed in the circular arc shape which a part of outer periphery by the side of the front-end | tip 47 protruded outward from the side wall of the cylindrical member 41 in the annular member 45 fits. As described above, a part of the outer periphery of the annular member 45 protruding outward from the side wall of the tubular member 41 fits into the recess 11b, so that the rotation operation around the central axis B of the annular member 45 (valve seat 40) (that is, the valve member 40). , Operation in the direction indicated by the black arrow in FIG.

The valve seat 40 is inserted into the lower part of the main body 11 and is assembled by being pressed against the wall of the storage chamber 13 by the plug 49. At this time, there is a concern that the valve seat 40 may be rotated along with the rotation of the plug 49. By this rotation, the annular member 45 is rotated and the position of the annular member 45 is shifted. In this modified example, as described above, the rotation of the annular member 45 (valve seat 40) can be prevented by the recess 11b, so that the rotation of the valve seat 40 during assembly can be prevented. Thereby, the valve seat 40 can be assembled without incurring a positional shift of the annular member 45 (outflow hole).

Further, in the annular member 45 of this modification, the front end side opening surface 46a is inclined with respect to the central axis C, but the rear end side opening surface 46b is orthogonal to the central axis C. Therefore, the annular member 45 of this modification can be produced by simply cutting one end of a normal circular tube obliquely. Other configurations, operations, and effects are the same as those in the above embodiment.

In addition, although the drain trap 1 was demonstrated in the said embodiment, you may make it use the valve seat which concerns on a claim of this application for other valves. Further, it is needless to say that the valve seat according to the claims of the present application may be used as a drain trap other than the steam trap.

The technology disclosed in the present application is useful for a valve seat on which a valve body is seated and detached and a drain trap having the same.

1 Drain trap 11a Passage wall 11b Recess 13 Storage chamber 15 Discharge passage 16 Float (valve element)
20, 40 Valve seats 21, 41

Tubular members

23, 43 Valve holes 25, 45

Annular members

27, 47 Front end 48 Rear end A, C Center axis

Claims

A cylindrical member that is opened and closed by a valve body and has a valve hole into which fluid flows;
A valve seat, comprising: an annular member that is fitted into a side wall of the cylindrical member so as to communicate the inside and outside of the cylindrical member and constitutes an outflow hole for the fluid.
The valve seat according to claim 1,
The cylindrical member has the valve hole at one end,
The valve seat according to claim 1, wherein a rear end of the annular member located on the valve hole side in the axial direction of the cylindrical member protrudes inward from a side wall of the cylindrical member.
The valve seat according to claim 1 or 2,
The valve seat according to claim 1, wherein a tip of the annular member protrudes outward from a side wall of the cylindrical member.
A drain storage chamber;
A valve element disposed in the storage chamber;
The valve seat according to any one of claims 1 to 3, wherein the valve body is seated.
A drain passage through which the drain of the storage chamber is discharged through the valve seat;
In the valve seat, the valve hole of the cylindrical member is opened and closed by the seat of the valve body, and the drain of the storage chamber flows as fluid, and the annular member communicates the inside of the cylindrical member with the discharge passage. A drain trap characterized in that the drain outlet hole is formed as a fluid.
A drain storage chamber;
A valve element disposed in the storage chamber;
The valve seat according to claim 3, wherein the valve body is seated.
A drain passage through which the drain of the storage chamber is discharged through the valve seat;
In the valve seat, the valve hole of the cylindrical member is opened and closed by the seat of the valve body, and the drain of the storage chamber flows as fluid, and the annular member communicates the inside of the cylindrical member with the discharge passage. The drain outflow hole is configured as a fluid,
A drain trap characterized in that a recess is formed on the inner surface of the passage wall of the discharge passage so as to fit a part of the outer periphery on the front end side projecting outward from the side wall of the tubular member of the annular member.
The drain trap according to claim 4 or 5,
A drain trap, wherein the annular member of the valve seat has a central axis extending in a direction of the discharge passage.