JP2000234697A - Condensate discharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a foreign substance such as iron powder from depositing on a surface of a condensate discharging hole. SOLUTION: A steam trap 1 has a condensate discharging hole 20 communicating a valve chamber 14 and an outlet 7, and a temperature control element 17 opening and closing the condensate discharging hole 20. An orifice member 9 has an orifice hole 91 having an opening area smaller the condensate discharging hole 20, and a rolling member 92 disposed by penetrating the orifice hole 91. Though a foreign substance such as iron powder does not depositing in the condensate discharging hole 20, but in the orifice 91, most part of the foreign substance depositing in the orifice hole 91 are removed by the rolling member 92 rolled by condensate flow, and flow away into an outlet piping 10 with the condensate. If the foreign substance such as iron powder depositing in the orifice hole 91 increases, a needle valve 3 is opened, and a ring nut is loosened to remove the orifice member 9, and then the orifice member 9 is cleaned up for re-using or changed to a new one.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a condensate discharge device for automatically discharging condensate generated in a steam piping system such as a steam transport pipe or a steam-using device, and more particularly to an iron powder mixed in a fluid. And the like are prevented from accumulating on the surface of the condensate discharge hole.

[0002]

2. Description of the Related Art In a steam piping system, the occurrence of condensate is unavoidable, and it is necessary to discharge the condensate generated as appropriate outside the system. A device that automatically discharges this condensate is a special valve called a steam trap. The basic configuration of the steam trap is to form an inlet, a valve chamber, and an outlet in the valve casing, and to condensate discharge that connects the valve chamber and the outlet to the valve casing or a valve seat member attached to the valve casing. A condensate is automatically discharged to an outlet by forming a hole, arranging a valve member in the valve chamber, and opening and closing the condensate discharge hole by the valve member.

[0003] Also, by using various valves with their valve openings being throttled, or by providing a throttle in the middle of the pipe, a condensate discharge hole having a small flow passage area is formed to discharge condensate. Things have also been done.

[0004]

In the above-mentioned condensate discharge device, there is a problem that foreign matters such as iron powder mixed in the fluid accumulate on the surface of the condensate discharge hole and block the flow passage. there were. This is because the condensate flows down the condensate discharge hole at a high speed, so that foreign substances such as iron powder mixed in the condensate pierce the surface of the condensate discharge hole and gradually accumulate.

Accordingly, an object of the present invention is to provide a condensate discharge device in which foreign substances such as iron powder do not accumulate on the surface of the condensate discharge hole.

[0006]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is to provide an orifice having an opening area smaller than that of the condensate discharge hole downstream of the condensate discharge hole. In the condensate discharge device, an orifice member having a hole is detachably arranged.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, an orifice member having an orifice hole having a smaller opening area than the condensate discharge hole is removably disposed downstream of the condensate discharge hole. Therefore, the pressure of the condensate discharge hole is maintained at a high pressure close to the pressure on the upstream side, and the condensate flows down the condensate discharge hole slowly. Therefore, foreign matter such as iron powder does not pierce the surface of the condensate discharge hole. Condensate flows at high speed through the orifice hole, or, if multiple orifice holes are formed in series, at the most downstream orifice hole, and foreign matter such as iron powder pierces the orifice hole surface and accumulates. . The orifice member on which foreign matter such as iron powder has accumulated is removed, cleaned and reused or replaced with a new one.

[0008]

Next, an embodiment of the present invention will be described with reference to FIG. The condensate discharge device according to the present embodiment includes a thermally responsive steam trap 1, a needle valve 3 connected to an inlet 2 of the steam trap 1, and a ring joint for connecting an inlet pipe 5 to an inlet 4 of the needle valve 3. 6, a nipple 8 connected to the outlet 7 of the steam trap 1, an orifice member 9 disposed in the nipple 8, and a ring joint 11 for connecting an outlet pipe 10 to the nipple 8.

The casing of the steam trap 1 is formed of an upper casing 12 having an inlet 2 and a lower casing 13 having an outlet 7. The upper casing 12 and the lower casing 13 are screwed together. , A valve chamber 14 is formed inside. A valve seat member 16 having a lead-out passage 15 communicating the valve chamber 14 and the outlet 7 is screwed to the lower casing 13.

A temperature control element 17 is arranged above the valve seat member 16. Although not shown, the temperature control element 17 is a substantially disk-shaped closed body capsule filled with a thermal expansion and contraction liquid between a wall member and a thin film diaphragm, and a spring 18 fixed to the lower casing 13. Biased down by
A plurality of ribs 19 provided on the inner periphery of the lower casing 13
Is held at the stepped portion. The thermal expansion / contraction liquid is formed of water, a liquid having a boiling point lower than that of water, or a mixture thereof.

The outlet path 15 of the valve seat member 16 includes a condensate discharge hole 20 and an upstream orifice hole 21 having an opening area smaller than that of the condensate discharge hole 20 which are sequentially formed from the valve chamber 14 side to the outlet 7 side. And a large-diameter hole 22 having an opening area larger than the condensate discharge hole 20. Number 23 is a screen.

A needle valve 3 is screwed to the inlet 2 of the steam trap 1. Needle valve 3 has inlet 4
The valve stem 3 is provided with a valve stem 33 in which a lead-out passage 31 and an outlet 32 are formed.
4 is disposed so as to be able to advance and retreat the screw. The valve stem 34 penetrates a packing nut 35, and a handle 36 for rotating operation is fixed to the tip by a nut 37. A seal ring 38 for maintaining airtightness between the valve stem 34 and the valve box 31 is attached to the valve stem 34. An inlet pipe 5 is detachably connected to the inlet 4 of the needle valve 3 by a ring joint 6 formed by a ring 51 and a ring nut 52.

A nipple 8 is provided at the outlet 7 of the steam trap 1.
Are screwed together. The outlet pipe 10 is detachably connected to the nipple 8 by a ring joint 11 formed of a ring 81 and a ring nut 82. Nipple 8
Orifice hole 91 having a smaller opening area than the upstream orifice hole 21 of the valve seat member 16 between the stepped portion and the outlet pipe 10.
The orifice member 9 formed with is formed so as to be detachable. A rolling member 92 is arranged to penetrate the orifice hole 91. The rolling member 92 is formed by bending an elongated rod material, and has a circular portion having an outer shape larger than the orifice hole 91 formed at an upper portion, and a curved portion expanded outward at a lower portion. .

The operation of the above-described condensate discharge device is as follows. Valve chamber 14 from inlet pipe 5 through needle valve 3
Temperature control element 1 when the temperature of the fluid flowing into
In 7, the built-in thermal expansion / contraction liquid shrinks and separates from the valve seat member 16 to open the condensate discharge hole 20. This allows
The condensate is discharged to the outlet pipe 10 side.

At this time, the condensate slowly flows down the condensate discharge hole 20 by the action of the upstream orifice hole 21 and the orifice hole 91. Similarly, the condensate slowly flows down the upstream orifice hole 21 by the action of the orifice hole 91. This prevents foreign substances such as iron powder mixed in the condensate from piercing the surfaces of the condensate discharge hole 20 and the upstream orifice hole 21.
The condensate flows at a high speed through the orifice hole 91, and foreign matter such as iron powder pierces and accumulates on the surface of the orifice hole 91. Most of the foreign matter such as iron powder deposited on the surface of the orifice hole 91 The condensed water is removed by the rolling member 92 which is rolled by the condensed water, and flows away to the outlet pipe 10 together with the condensed water.

If foreign matters such as iron powder accumulated on the surface of the orifice hole 91 cannot be removed by the rolling member 92 and the amount of accumulation increases, the needle valve 3 is closed and the ring nut 82 is loosened. By removing the outlet pipe 10 from the nipple 8, the orifice member 9 is removed from the nipple 8. Then, the orifice member 9 is cleaned and reused or replaced with a new one.

When steam flows into the valve chamber 14 due to the discharge of the condensate, the temperature control element 17 expands the built-in thermal expansion / contraction liquid and sits on the valve seat member 16 to condense the condensate discharge hole 20. Is closed. This prevents the outflow of steam.

In the above embodiment, the steam trap 1 and the needle valve 3 are formed separately, and the orifice member 9 is disposed in the nipple 8. Next, an embodiment in which a steam trap and a needle valve are integrally formed and an orifice member is disposed in the steam trap will be described with reference to FIG. In the embodiments described below, members performing the same operations as those in the embodiment of FIG. 1 are denoted by the same reference numerals, and redundant description will be avoided.

The condensate discharge device of the present embodiment includes a heat-responsive steam trap 1, a needle valve 3 formed integrally with the steam trap 1, and a ring for connecting an inlet pipe 5 to an inlet 4 of the needle valve 3. It comprises a joint 6 and a ring joint 11 for connecting the outlet pipe 10 to the outlet 7 of the steam trap 1.

The casing of the steam trap 1 is formed of an upper casing 101 having an inlet 4 as a needle valve 3, an outlet 31 and an outlet 32, and a lower casing 13 having an outlet 7. You. An outlet pipe 10 is detachably connected to an outlet 7 of the steam trap 1 by a ring joint 11. An orifice member 9 having an orifice hole 91 having a smaller opening area than the upstream orifice hole 21 of the valve seat member 16 is interposed between the step portion of the steam trap 1 and the outlet pipe 10 so as to be detachable. .

The operation of the above-described condensate discharge device is as follows. When the temperature of the fluid flowing into the valve chamber 14 is low, the temperature control element 17 opens the condensate discharge hole 20. Thus, the condensate is discharged to the outlet pipe 10 side. At this time,
Foreign matter such as iron powder mixed in the condensate water
Most of the foreign matter is removed by the rolling member 92 which is rolled by the condensed water, and flows out to the outlet pipe 10 together with the condensed water. When foreign matter such as iron powder cannot be completely removed by the rolling member 92 and the amount of accumulation increases, the needle valve 3 is closed and the ring nut 8 is removed.
The orifice member 9 is removed from the steam trap 1 by loosening the outlet pipe 10 from the steam trap 1.
The orifice member 9 is cleaned and reused or replaced with a new one.

When steam flows into the valve chamber 14 due to the discharge of the condensate, the temperature control element 17 sits on the valve seat member 16 and closes the condensate discharge hole 20. This prevents the outflow of steam.

In the above embodiment, a condensate discharge device applied to a thermally responsive steam trap has been exemplified. However, the present invention is applicable to other types of steam traps such as a float type and a disk type.
Alternatively, the present invention can be applied to a valve such as a needle valve, or a valve provided with a throttle in the middle of a pipe.

[0024]

The present invention has the following specific effects. As described above, the condensate discharge device according to the present invention can prevent foreign matters such as iron powder from accumulating on the surface of the condensate discharge hole. Further, since the orifice member in which foreign matter such as iron powder has accumulated in the orifice hole can be removed and cleaned or replaced with a new one, loss of the condensate discharge function can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of a condensate discharge device according to an embodiment of the present invention.

FIG. 2 is a sectional view of another condensate discharge device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steam trap 3 Needle valve 8 Nipple 9 Orifice member 17 Temperature control element 20 Condensate discharge hole 21 Upstream orifice hole 91 Orifice hole 92 Rolling member

Claims (1)

[Claims] 1. A condensate discharge device wherein an orifice member having an orifice hole having a smaller opening area than the condensate discharge hole is removably disposed downstream of the condensate discharge hole.