JP2608517B2 - steam trap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reduces the size of a switching valve,
The present invention relates to a steam trap which eliminates the need for a stop valve at the time of a trap test and simplifies steam exhaust.

[0002]

2. Description of the Related Art Conventionally, Japanese Utility Model Laid-Open Publication No. 4-138199 has a trap valve, a bypass, and a stopper plug function provided with a switching valve.
The steam trap with a built-in switching valve is known in Japanese Patent Application Laid-Open Publication No. H11-157, but since such a steam trap has an inflow hole and an outflow hole in a vertical direction and a bypass hole in a horizontal direction in one rotating disk, the rotating disk itself is not provided. Has a drawback that the switching valve becomes large, and a trap valve is provided at the trap outlet side during the trap test, and a connection pipe is provided between the inlet side and the trap outlet side of the stop valve. A test valve must be installed, and such piping work has a drawback that it is extremely troublesome.

Further, when the trap is disassembled, since steam is accumulated in the trap chamber, it takes a long time for cooling before disassembly, and therefore, the lid forming the trap chamber is removed to exhaust the steam. However, at the time of the exhaust, the direction in which the steam is exhausted has not been determined, and there has been a disadvantage that the steam exhaust involves a risk.

[0004]

SUMMARY OF THE INVENTION According to the present invention, the switching valve is divided into a trap switching valve body and a bypass switching valve body to reduce the size.
In addition, by rotating the trap switching valve body and the bypass switching valve body, various functions such as stopcock, bypass operation, normal operation, and test operation are provided, and the steam in the trap chamber is automatically externalized when functioning as a stopcock. It is intended to provide a steam trap which enables cooling before decomposition in a short time and eliminates the danger at the time of steam exhaust.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, such as the size of a switching valve, the necessity of mounting a stop valve and a test valve, and the cooling and danger of disassembling a trap. And the bypass chamber is divided into a plate-shaped trap switching valve body and a bypass switching valve body that opens and closes a primary communication hole and a secondary communication hole that respectively communicate the primary connection port and the secondary connection port. In order to reduce the size of the switching valve, the rotation of the switching valve enables various functions such as stoppering, bypass operation, normal operation, and test operation, and the primary connection port and the test connection port are connected to the trap chamber. To improve the operability of the operation test at the time of the trap test, and to discharge the steam in the trap chamber to the outside through the test connection port at the time of the stopper function, thereby enabling the cooling before disassembly in a short time. Both, in which St overcome the above drawbacks by providing a steam trap summarized as to eliminate the risk at the time of the steam exhaust.

A steam trap according to the present invention has a trap chamber and a bypass chamber, and has a partition between the primary side connection port and the secondary side connection port, and a primary chamber communicating the trap chamber and the bypass chamber with the primary side connection port. It comprises a valve body forming a side communication hole, a secondary communication hole communicating the trap chamber and the bypass chamber with the secondary connection port, a trap switching valve element and a bypass switching valve element.

The trap switching valve is rotatably provided between the trap chamber and the partition wall. The trap switching valve has a trap inflow port connected to the primary communication hole and a trap valve provided in the trap chamber. A trap exhaust hole having a valve port opened and closed by the body and connected to the secondary communication hole is formed to control opening and closing of the primary communication hole and the secondary communication hole.

The bypass switching valve is provided between the bypass chamber and the partition wall in conjunction with the trap switching valve, and the bypass switching valve is provided with either a primary communication hole or a secondary communication hole communicating with the bypass chamber. A bypass communication hole that is connected to one of the communication holes is formed, and the primary communication hole and the secondary communication hole are blocked or opened.

A test connection port is formed in the valve body, a test communication hole communicating the trap chamber with the test connection port is formed in the partition wall, and the trap switching valve body is connected to the primary communication hole. A test inflow hole is formed, and the opening and closing of the primary communication hole is controlled.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a steam trap according to the present invention, and a valve body 2 of the steam trap 1 has a primary side which is an inlet formed from a lateral direction. An upper mounting recess 5 and a lower mounting recess 6 are formed above and below the side connecting port 3 and the secondary side connecting port 4 which is the outlet side, respectively. A shaft insertion hole 8 penetrating the upper mounting concave portion 5 and the lower mounting concave portion 6 is formed at a central portion of the partition wall 7 between 6.

The partition wall 7 on the outer peripheral side of the shaft insertion hole 8 penetrates the upper mounting recess 5 and the lower mounting recess 6 and communicates with the primary connection port 3. Further, a secondary communication hole 10 penetrating the lower mounting recess 6 and communicating with the secondary connection port 4 is formed.

Further, a test connection port 11 is formed in the valve body 2 in a lateral direction at a position displaced by a predetermined angle in a circumferential direction about the axis of the shaft insertion hole 8, and the test connection port 11 and the upper mounting recess are formed. 5 is formed with a test communication hole 12 penetrating therethrough.

Reference numeral 13 denotes a trap portion. The trap portion 13 has a trap lid 16 mounted on an upper portion of a trap switching valve body 15 having a disk portion 14 rotatably mounted in the upper mounting recess 5. A space defined by the trap lid 16 and the trap switching valve body 15 forms a trap chamber 17.

A valve seat 19 having a valve port 18 is provided at a central portion of the trap switching valve element 15, and the valve port 18 and the secondary communication hole 10 are changed depending on the rotational position of the trap switching valve element 15 during the rotation operation. Alternatively, a trap exhaust hole 20 to be connected to the test communication hole 12 is formed.

A trap inflow hole 21 and a test inflow hole 22 for connecting the primary communication hole 9 and the trap chamber 17 in communication with each other are formed according to the rotational position of the trap switching valve element 15 during the rotation operation.

Reference numeral 23 denotes a trap. The trap 23 is mounted on the ceiling side of the trap lid 16, and a valve body 25 is mounted via a bellows 24 which is deformed by a temperature change.
, And controls opening and closing of the valve port 18.

A rotary support shaft 26 is formed at the lower center of the disc portion 14 of the trap switching valve body 15 so as to hang down. The rotary support shaft 26 is inserted into the shaft insertion hole 8 of the partition wall 7 of the valve body 2. A nut member 29 is provided on the lower side protruding into the lower mounting recess 6 via a disk-shaped bypass switching valve body 27 and an elastic member 28 such as a spring, which are connected in conjunction with the rotation of the trap switching valve body 15. And the trap switching valve element 15 and the bypass switching valve element 27 are attached to the upper and lower surfaces of the partition wall 7 in close contact with each other.

In the drawings, reference numerals 30 and 30a denote disc-shaped seal members interposed between the trap switching valve element 15 and the partition wall 7 and between the bypass switching valve element 27 and the partition wall 7.

Reference numeral 31 denotes a bypass lid, which is a bypass lid.
31 is mounted in the lower mounting recess 6, and a space defined by the lower mounting recess 6 and the bypass lid 31 is formed in the bypass chamber.
32.

The bypass switching valve 27 has a trap switching valve.
Due to the rotation operation of 15, the trap exhaust hole 20 does not communicate with the secondary communication hole 10 or the test communication hole 12, and the trap inflow hole 21 and the test inflow hole 22 do not communicate with the primary communication hole 9 as well. When it reaches, the bypass communication holes 33 and 33a to connect the primary communication hole 9 and the secondary communication hole 10 to the bypass chamber 32 are formed.

The bypass switching valve body 27 is not limited to the above embodiment. For example, when the bypass switching valve body 27 rotates as shown in FIGS.
Instead of the bypass communication hole 33 that should be connected to communicate with the bypass chamber 32, a fan-shaped notch 34 may be formed at that location to form the bypass switching valve body 27, and in this case, the seal member 30a is a ring. It is formed in a shape.

The seal members 30 and 30a may be formed in a disk shape or a ring shape.
Seal members such as rings, 36 and 36a are stoppers for stopping rotation of the bypass switching valve body 27 having the cutout portions 34, and 37 is a strainer.

Next, the operation of the steam trap according to the present invention will be described. The steam trap 1 is disposed on a steam pipe or the like in a steam system to separate steam and drain. It has various functions of operation, normal operation for operating the trap 23, and test operation for testing the function of the trap 23.

First, in order to function as a stopper, as shown in FIGS. 6 to 8, the trap lid 16 is rotated to rotate the test inflow hole 22 of the trap switching valve body 15 to a position where it coincides with the test communication hole 12. Then, the test connection port 11 and the trap chamber 17 are connected and connected.

Further, the bypass switching valve body 27 which is interlocked with the trap switching valve body 15 also rotates.
By rotating the bypass communication holes 33 and 33a to a position that does not coincide with the primary communication hole 9 and the secondary communication hole 10,
The bypass chamber 32 is in a closed state.

As described above, when the trap lid 16 is rotated to function as a stopper, the trap chamber 17 becomes the test connection port 11.
Therefore, the steam in the trap chamber 17 is discharged to the outside from the test connection port 11 at the same time as the stopper function by stopping the steam in the trap chamber 17.

Next, in order to perform the bypass operation, FIGS.
As shown in FIG. 1, by rotating the trap lid 16, the trap exhaust hole 20, the trap inflow hole 21, and the test inflow hole 22 of the trap switching valve body 15 are connected to the primary side communication hole 9, the secondary side communication hole 10, and the test port. When it is rotated to a position where it does not coincide with the communication hole 12, the primary connection port 3 and the trap chamber 17, the trap chamber 17 and the secondary connection port 4, and the trap chamber 17 and the test connection port 11 are shut off.

Further, the bypass switching valve body 27 interlocked with the trap switching valve body 15 also rotates.
The bypass communication holes 33, 33a of the first and second communication holes 9 and 10 coincide with the primary communication hole 9 and the secondary communication hole 10, so that the primary connection port 3 and the secondary connection port 4 are connected through the bypass chamber 32.

Next, in order to perform the normal operation for operating the trap 23, as shown in FIGS. 12 to 14, the trap lid 16 is rotated, and the trap inflow hole 21 of the trap switching valve body 15 is moved to the primary side communication hole 9 as shown in FIGS. When the trap exhaust hole 20 is rotated to a position where it coincides with the secondary communication hole 10, the primary connection port 3 and the trap chamber 17 are connected and connected,
The secondary connection port 4 and the trap chamber 17 are communicated and connected.

Further, the bypass switching valve body 27 which cooperates with the trap switching valve body 15 also rotates.
By rotating the bypass communication holes 33 and 33a to a position that does not coincide with the primary communication hole 9 and the secondary communication hole 10,
The bypass chamber 32 is in a closed state.

As described above, when the trap lid 16 is rotated to the normal operation position, the primary connection port 3 and the secondary connection port 4 are moved.
Is communicated with the trap chamber 17, and thus operates as a normal trap function.

Next, in order to perform a test operation, FIGS.
As shown in FIG. 7, a position where the trap switching valve body 15 is rotated to make the test inflow hole 22 of the trap switching valve body 15 coincide with the primary communication hole 9 and the trap exhaust hole 20 coincides with the test communication hole 12. When rotated, the primary connection port 3 and the trap chamber 17 are connected to each other and the test connection port 11 is also connected to the trap chamber 17.

Further, the bypass switching valve body 27 which is interlocked with the trap switching valve body 15 also rotates.
By rotating the bypass communication holes 33 and 33a to a position that does not coincide with the primary communication hole 9 and the secondary communication hole 10,
The bypass chamber 32 is in a closed state.

As described above, when the trap lid 16 is rotated to the test operation position, the primary connection port 3 and the test connection port are connected.
The operation test of the trap 23 of the trap section 13 can be performed by communicating with the trap 11 via the trap chamber 17.

The steam trap 1 is provided with a trap chamber 17 and a bypass chamber 32, respectively, and the trap chamber 17 and the bypass chamber 32 communicate with the primary connection port 3 and the secondary connection port 4, respectively. The valve body that opens and closes the hole 9 and the secondary communication hole 10 is a plate-like trap switching valve body 15 and a bypass switching valve body.
By dividing into 27, the switching valve body can be formed as thin as the strength can be allowed.

[0036]

In summary, the present invention relates to a primary valve which connects the trap chamber 17 and the bypass chamber 32 with the primary connection port 3 to the partition wall 7 between the primary connection port 3 and the secondary connection port 4 in the valve body 2. In addition to forming the side communication hole 9, the secondary communication hole 10 that connects the trap chamber 17 and the bypass chamber 32 to the secondary connection port 4 is formed, and the primary communication hole is formed between the trap chamber 17 and the partition wall 7. 9 and a trap switching valve body 15 which is to be rotated to shut off the secondary communication hole 10 and a bypass chamber 32 is provided.
Between the primary side communication hole 9 and the secondary side communication hole 10
A bypass switching valve body 27 which is rotated in conjunction with the trap switching valve body 15 to be shut off. The trap switching valve body 15 has a trap inlet hole 21 connected to the primary communication hole 9 and a trap chamber 17. The valve 23 has a valve port 18 which is opened and closed by a valve element 25 of the trap 23 and forms a trap exhaust hole 20 which is connected to the secondary communication hole 10. Since the bypass communication holes 33 and 33a that are connected to one of the primary communication hole 9 and the secondary communication hole 10 communicating with the chamber 32 are formed, the trap chamber 17 and the bypass chamber 32 are connected to the primary connection port. 3 and secondary connection port 4
Primary communication hole 9 and secondary communication hole 10 communicating with
Is divided into a plate-shaped trap switching valve element 15 and a bypass switching valve element 27, so that the thickness of the switching valve element can be formed as thin as the strength can be allowed. It is possible to reduce the size as compared with the conventional steam trap, and furthermore, by rotating the trap switching valve body 15 and the bypass switching valve body 27, it is possible to have various functions such as stopcock, bypass operation, and normal operation. .

Further, a test connection port 11 is formed in the valve body 2, a test communication hole 12 for communicating the trap chamber 17 with the test connection port 11 is formed in the partition 7, and a trap switching valve body 15 is formed in the partition 7. Test inflow hole connected to primary side communication hole 9
Since the 22 is formed, in addition to the above effects,
Rotate 15 to connect primary connection port 3 and test connection port 11
And the trap switching valve body
By closing the bypass chamber 32 by the bypass switching valve body 27 interlocked with 15, the primary side connection port 3 and the test connection port
11 communicates through the trap chamber 17, which eliminates the need for installing a stop valve or mounting a test valve during a trap test as in the past, making the operation test of the trap 23 simple and easy. When the switching valve element 15 and the bypass switching valve element 27 function as a stopcock, the trap chamber 17 is communicated with the outside through the test connection port 11, so that the steam in the trap chamber 17 is externalized from the test connection port 11. It can be discharged, so that cooling before decomposition can be performed in a short time, and the danger at the time of steam exhaustion can be eliminated.

[Brief description of the drawings]

FIG. 1 is a sectional view of a steam trap according to the present invention.

FIG. 2 is a sectional view of another embodiment of the steam trap.

FIG. 3 is a cross-sectional view showing a positional relationship between connection ports of a valve body in the steam trap.

FIG. 4 is a plan view of a steam trap.

FIG. 5 is a side view of the steam trap.

FIG. 6 is a cross-sectional view showing the rotational position of the trap switching valve body when the primary connection port and the secondary connection port are shut off.

FIG. 7 is a cross-sectional view showing a rotational position of a bypass switching valve body when the primary connection port and the secondary connection port are shut off.

FIG. 8 is a cross-sectional view showing the rotational position of another embodiment of the bypass switching valve body when the primary connection port and the secondary connection port are cut off.

FIG. 9 is a cross-sectional view showing the rotational position of the trap switching valve body when the primary connection port and the secondary connection port are bypassed.

FIG. 10 is a cross-sectional view showing a rotational position of a bypass switching valve body when a primary connection port and a secondary connection port are bypassed.

FIG. 11 is a sectional view showing a rotational position of another embodiment of the bypass switching valve body when the primary connection port and the secondary connection port are bypassed.

FIG. 12 is a cross-sectional view showing a rotation position of a trap switching valve body when a primary connection port and a secondary connection port are communicated via a trap chamber.

FIG. 13 is a cross-sectional view showing a rotational position of a bypass switching valve body when the primary connection port and the secondary connection port are communicated via a trap chamber.

FIG. 14 is a sectional view showing a rotational position of another embodiment of the bypass switching valve body when the primary connection port and the secondary connection port are communicated via the trap chamber.

FIG. 15 is a cross-sectional view showing a rotational position of a trap switching valve body when a primary connection port and a test connection port are communicated via a trap chamber.

FIG. 16 is a cross-sectional view showing a rotational position of a bypass switching valve body when a primary connection port and a test connection port are communicated via a trap chamber.

FIG. 17 is a cross-sectional view showing the rotational position of another embodiment of the bypass switching valve body when the primary connection port and the test connection port are communicated via the trap chamber.

[Explanation of symbols]

 2 Valve body 3 Primary connection port 4 Secondary connection port 7 Partition wall 9 Primary communication hole 10 Secondary communication hole 11 Test connection port 12 Test communication hole 15 Trap switching valve element 17 Trap chamber 18 Valve port 20 Trap exhaust hole 21 Trap inlet 22 Test inlet 23 Trap 25 Valve 27 Bypass switching valve 32 Bypass chamber 33, 33a Bypass communication hole

Claims (2)

(57) [Claims] 1. A primary communication hole for communicating a trap chamber and a bypass chamber with a primary connection port is formed in a partition wall between a primary connection port and a secondary connection port in a valve body, and a trap chamber and a bypass are formed. A secondary-side communication hole communicating the chamber and the secondary-side connection port is formed, and between the trap chamber and the partition wall, a rotary-operated trap switching valve element that should shut off the primary-side communication hole and the secondary-side communication hole is provided. Along with the bypass switching valve, a bypass switching valve is provided between the bypass chamber and the partition wall. The bypass switching valve is rotatably operated in conjunction with a trap switching valve that should block the primary communication hole and the secondary communication hole. A trap inlet that is connected to the primary communication hole and a valve port that is opened and closed by a valve body of a trap provided in the trap chamber,
A trap exhaust hole communicating with the secondary communication hole is formed, and the bypass switching valve has a bypass communicating with one of the primary communication hole and the secondary communication hole communicating with the bypass chamber. A steam trap having a communication hole formed therein. 2. The steam trap according to claim 1, wherein
A test connection port is formed in the valve body, and a test communication hole that connects the trap chamber and the test connection port is formed in the partition,
A steam trap, wherein a test inflow hole connected to the primary communication hole is formed in the trap switching valve body.