JPH11118095A - Condensate discharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent metal ion from sticking and depositing on the front surface of a condensate discharging hole whether the amount of discharged condensate is large or small. SOLUTION: An inlet 4, a valve chamber 3 and an outlet 5 are formed by a valve casing composed of an upper casing 1 and a lower casing 2. A valve seat member 8 provided with a guide-out passage 7 is screwed to the lower casing 2. A temperature control element 10 for opening and closing the guide-out passage 7 is held above the valve seat member 8 through a snap ring 20. The guide-out passage 7 is composed of a condensate discharging hole 21, an upstream orifice hole 22 having a smaller opening area than the condensate discharging hole 21, and an orifice hole 23 having a smaller opening area than the upstream orifice hole 22. A rolling member 25 is arranged through the orifice hole 23. In the rolling member 25, a circular part having a larger outer shape than the orifice hole 23 is formed on the upper side by bending a long thin bar material, and collision parts 27, 28 with which the flow of condensate to be allowed to flow down in the orifice hole 23 collides are formed by bending the lower ends.

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 apparatus, and more particularly to a metal ion dissolved in a fluid. To prevent the water from accumulating on the surface of the condensate discharge hole and closing the hole.

[0002]

2. Description of the Related Art In a steam piping system, the occurrence of condensate is inevitable, and it is necessary to discharge the condensate generated as appropriate to the outside of the system. A device that automatically discharges this condensate is a special valve called a steam trap.

[0003] The steam trap is of a mechanical type utilizing a difference in specific gravity between steam and condensate, a thermodynamic type utilizing a difference in thermodynamic characteristics between steam and condensate, and a steam trap according to the driving principle of a valve member. It is classified into thermostatic type, etc. utilizing the temperature difference of water, but the basic configuration is to form an inlet, a valve chamber and an outlet in the valve case, and attach it to the valve case or the valve case. The condensate discharge hole that connects the valve chamber and the outlet is formed in the valve seat member, and the valve member is arranged in the valve chamber, and the condensate discharge hole is automatically opened and closed by the valve member so that the condensate is automatically discharged to the outlet. To discharge.

[0004] Further, 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.

[0005]

In the above-described condensate discharge device, there is a problem that metal ions dissolved in the fluid accumulate on the surface of the condensate discharge hole and block the flow path. For example, when the pipe is formed of a copper pipe, dissolved copper ions are deposited from the copper pipe, and when the pipe is formed of a steel pipe, dissolved iron ions are deposited from the steel pipe. This is because the condensate flows down the condensate discharge hole at a high speed, so that the metal ions dissolved in the condensate penetrate the surface of the condensate discharge hole and gradually accumulate.

Accordingly, it is an object of the present invention to provide a condensate discharge device in which metal ions do not adhere to and accumulate on the surface of a condensate discharge hole.

[0007]

The technical means of the present invention taken to solve the above-mentioned technical problem is to provide an orifice hole having an opening area smaller than that of the condensate discharge hole on the downstream side of the condensate discharge hole. A rolling member having an upper portion positioned at the upper end of the orifice hole is disposed through the orifice hole, and the condensate flow flowing down the orifice hole by bending the lower end of the rolling member outward. The condensate discharge device is characterized in that a collision portion for colliding is formed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, an orifice hole having a smaller opening area than a condensate discharge hole is formed 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, metal ions do not adhere to the surface of the condensate discharge hole. The condensate flows at high speed through the orifice hole, or in the case where a plurality of orifice holes are formed in series, the orifice hole located at the most downstream position, and metal ions adhere to the surface of the orifice hole. However, the metal ions adhering to the surface of the orifice hole are removed by the rolling members that roll due to the condensate flow, and therefore do not accumulate. The removed metal ions flow downstream with the condensate.

According to the present invention, a collision portion bent outward is formed at the lower end of the rolling member. Therefore, even when the amount of discharged condensate is small and the condensed water flows slowly or flows down the potapota and the orifice hole, the condensed water flowing down the orifice hole collides with the collision portion, and the rolling member is reliably fixed. The metal ions do not deposit on the surface of the orifice hole because they are rolled.

[0010]

An embodiment showing a specific example of the above technical means will be described (see FIG. 1). This embodiment is applied to a thermo-responsive steam trap. An upper casing 1 and a lower casing 2 are screwed together to form a valve casing having a valve chamber 3 therein.
Thing is formed. The upper case 1 has an inlet 4 and the lower case 2 has an outlet 5. The inlet 4 and the outlet 5 are formed coaxially. A valve seat member 8 having an outlet 7 communicating the valve chamber 3 and the outlet 5 is screwed to the transverse wall 6 of the lower casing 2. The upper casing 1, the lower casing 2, and the valve seat member 8 are each formed of stainless steel.

A temperature control element 10 is arranged above the valve seat member 8. The temperature control element 10 includes a wall member 12 having an inlet 11, a plug member 13 for sealing the inlet 11, and a diaphragm 15 forming an accommodation chamber 14 between the wall member 12.
An expansion medium 16 sealed in the storage chamber 14, a valve member 17 fixed to the diaphragm 15, and a fixed wall member 1 fixed to the outer peripheral edge of the diaphragm 15 with the wall member 12 interposed therebetween.
8 is formed. The temperature control element 10 is held by a snap ring 20 fixed to the inner periphery of the lower casing 2, and a plurality of ribs formed on the inner periphery of the lower casing 2 with the outer periphery of the lower surface of the fixed wall member 18. Hits 19 steps. Both the temperature control element 10 and the snap ring 20 are formed of stainless steel. The expansion medium 16 is formed of water, a liquid having a lower boiling point than water, or a mixture thereof.

The outlet path 7 of the valve seat member 8 includes a condensate discharge hole 21 and an upstream orifice hole 22 having an opening area smaller than that of the condensate discharge hole 21 formed in order from the valve chamber 3 side to the outlet 5 side.
And an orifice hole 23 having an opening area smaller than that of the upstream orifice hole 22. The orifice hole 23 is formed in an orifice member 24 press-fitted and fixed to the outlet passage 7. The rolling member 25 is disposed through the orifice hole 23. The rolling member 25 bends an elongated rod to form a circular portion having an outer shape larger than the orifice hole 23 on the upper side, and the lower end is bent outward and the condensate flow flowing down the orifice hole 23 collides. Parts 27 and 28 are formed.
The circular portion of the rolling member 25 rests on the upper end of the orifice hole 23, and the collision portions 27 and 28 are located below the orifice hole 23. Both the orifice member 24 and the rolling member 25 are formed of stainless steel. The number 26 is a screen.

The operation of the above condensate discharge device is as follows. When the temperature of the fluid flowing into the valve chamber 3 from the inlet 4 is low, the expansion medium 16 contracts, the diaphragm 15 is displaced toward the wall member 12, and the valve member 17 is separated from the valve seat member 8 and led out. Road 7 is open. Thereby, the condensate is discharged from the outlet path 7 to the outlet 5. At this time, the condensate slowly flows down the condensate discharge hole 21 by the action of the upstream orifice hole 22 and the orifice hole 23. Similarly, the condensate flows down the upstream orifice hole 22 slowly by the action of the orifice hole 23. As a result, metal ions dissolved in the condensate do not adhere to the surfaces of the condensate discharge hole 21 and the upstream orifice hole 22. The condensate flows through the orifice hole 23 at high speed, and the metal ions adhere to the surface of the orifice hole 23. The metal ions adhering to the surface of the orifice hole 23 are moved by the rolling member 25 which is rolled by the condensate flow. It does not accumulate as it is removed. The metal ions flow off to the outlet 5 together with the condensate. Further, even when the condensed water discharged is small and the condensed water flows slowly or flows down through the orifice hole 23 and the condensate, the condensed water flowing down the orifice hole 23 collides with the collision portions 27 and 28 and rolls. Since the member 25 is reliably rolled, no metal ions are deposited on the surface of the orifice hole 23.

When steam flows into the valve chamber 3 due to the discharge of the condensate, the expansion medium 16 expands and the diaphragm 15 expands.
Is displaced to the fixed wall member 18 side, and the valve member 17 is moved to the valve seat member 8.
And the outlet path 7 is closed. This prevents the outflow of steam.

In the above embodiment, a condensate discharge device applied to a thermo-responsive steam trap has been exemplified.
The present invention can also be applied to other types of steam traps, such as a steam trap and a disc trap.

Another embodiment showing a specific example of the above technical means will be described (see FIG. 2). This embodiment is applied to a needle valve. A valve casing is formed by screwing a packing retainer nut 32 to the valve box 31. Valve box 3
1, an inlet 33, an outlet path 34 and an outlet 35 are formed. The inlet 33 and the outlet 35 are formed coaxially. The valve box 31 and the packing retainer nut 32 are formed of stainless steel.

A valve stem 36 is disposed in the valve box 31 so as to advance and retreat. The right part of the valve stem 36 penetrates the packing presser nut 32, and a handle 37 for turning operation is provided on the right end of the nut 3.
8 fixed. A gland packing 39 and a packing presser 40 are disposed between the valve box 31 and the valve stem 36,
It is fixed by a packing holding nut 32. Valve stem 3
Numeral 6 is set at a position where a small condensate discharge hole 41 is formed between the valve portion at the lower end and the lead-out passage 34 so that only the condensate can be discharged without leaking steam by the rotation of the handle 37. The valve stem 36 and the packing retainer 40 are formed of stainless steel, and the gland packing 39 is formed of fluororesin.

An orifice member 42 is press-fitted and fixed to the outlet 35. The orifice member 42 has an orifice hole 43 having a smaller opening area than the condensate discharge hole 41.
A rolling member 44 is disposed through the orifice hole 43.
The rolling member 44 bends an elongated rod to form a circular portion having an outer shape larger than the orifice hole 43 on the upper side, and the lower end is bent outward to cause a condensate flow flowing down the orifice hole 43 to collide. Parts 45 and 46 are formed. The orifice member 42 and the rolling member 44 are formed of stainless steel.

The operation of the above-described condensate discharge device is as follows. The condensate flowing down the condensate discharge hole 41 is supplied to the orifice hole 43.
Gently flows down the condensate discharge hole 41. As a result, the metal ions dissolved in the condensate do not adhere to the surface of the condensate discharge hole 41. The metal ions adhering to the surface of the orifice hole 43 are removed by the rolling member 44 and flow away to the outlet 35 together with the condensate. Further, even when the discharged condensate amount is small, the condensed water flowing down the orifice hole 43 collides with the collision portions 45 and 46, and the rolling member 44 is reliably rolled.

In the above embodiment, the condensate discharge device applied to the needle valve has been exemplified. However, the present invention can be applied to other types of valves.

Another embodiment showing a specific example of the above technical means will be described (see FIG. 3). In this embodiment, a constriction portion is provided in the middle of a pipe to form a condensate discharge hole having a small flow passage area. A constriction portion 52 is formed in the middle of the condensate discharge pipe 51, and the constriction portion 52 forms a condensate discharge hole 53 having a small flow path area. Condensate discharge hole 53
Is formed in a flow path area that allows only condensate to be discharged without leaking steam. The condensate discharge pipe 51 is formed of a copper pipe or a steel pipe.

The lower end of the condensate discharge pipe 51 is connected to a ring joint 54 made of a copper alloy formed of a main body 55, a ring 56 and a ring nut 57. An orifice member 59 is press-fitted and fixed to an outlet 58 formed in the main body 55.
The orifice member 59 has an orifice hole 60 having an opening area smaller than that of the condensate discharge hole 53. The rolling member 61 is disposed through the orifice hole 60. The rolling member 61 is formed by bending an elongated bar so that the orifice hole 60
A circular portion having a larger outer shape is formed, and lower ends are bent outward to form collision portions 62 and 63 with which a condensate flow flowing down the orifice hole 60 collides. The orifice member 59 and the rolling member 61 are formed of stainless steel.

Condensate flowing down the condensate discharge hole 53 flows down the condensate discharge hole 53 gently by the action of the orifice hole 60. Thereby, the metal ions dissolved in the condensate do not adhere to the surface of the condensate discharge hole 53. The metal ions adhering to the surface of the orifice hole 60 are removed by the rolling member 61 and flow away to the outlet 58 together with the condensate. Further, even when the amount of discharged condensate is small, the condensed water flowing down the orifice hole 60 collides with the collision portions 62 and 63, and the rolling member 61 is reliably rolled.

[0024]

The present invention has the following specific effects. As described above, according to the present invention, not only when the amount of discharged condensate is large but also when the amount is small, metal ions do not adhere and accumulate on the surface of the condensate discharge hole. The original function as the condensate discharge device can be maintained for a long time without blocking the discharge hole.

[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 the embodiment of the present invention.

FIG. 3 is a sectional view of still another condensate discharge device according to the embodiment of the present invention.

[Explanation of symbols]

 21, 41, 53 Condensate discharge hole 22 Upstream orifice hole 23, 43, 60 Orifice hole 25, 44, 61 Rolling member 27, 28, 45, 46, 62, 63 Collision part

Claims (1)

[Claims] An orifice hole having an opening area smaller than that of the condensate discharge hole is formed downstream of the condensate discharge hole, and a rolling member having an upper portion located at the upper end of the orifice hole passes through the orifice hole. Wherein the lower end of the rolling member is bent outward to form a collision portion with which a condensate flow flowing down the orifice hole collides.