JPH08312892A - Thermal reaction type steam trap - Google Patents

Abstract

PURPOSE: To provide a thermal reaction type steam trap for mass quantity, capable of exhausting quantities of condensed water. CONSTITUTION: A valve casing, having a valve chamber 3 in the inside, is formed by a main body 1 and an end member 2, and an inlet 4 and an outlet 5 are formed on the valve casing. The inlet is communicated with the valve chamber through inflow passages 6 and 7, and the valve chamber is communicated with the outlet via a first leading out path 8 opened in a first valve seat member 9 and a second leading out path 10 opened in a second valve seat member 11. A temperature control machine element 12 is arranged between the valve seat members 9 and 11. In the temperature control machine element, an expansion medium 15 is enclosed between a wall member 13 to which a first valve member 16 is fixed, and a diaphragm 14 to which a second valve member 17 is fixed. The wall member is energized by a coil spring 19, as an elastic member, to lock the temperature control machine element to a stopper part 20 formed in a valve chamber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a temperature control element that includes a medium that is heated and cooled by steam and condensate and expands and contracts according to the temperature of the condensate. The present invention relates to a heat-actuated steam trap that automatically discharges water, and particularly to a heat-actuated steam trap that can discharge a large amount of condensed water.

[0002]

2. Description of the Related Art The basic structure of a heat-actuated steam trap is known, for example, from Japanese Patent Publication No. 60-46318. As understood from the publication, a temperature control element in which an expansion medium is enclosed between a wall member and a diaphragm is arranged in a valve chamber communicating with an inlet, and the valve chamber is displaced by the displacement of the diaphragm due to expansion and contraction of the expansion medium. The lead-out path that communicates with the outlet is opened and closed.

When a high temperature fluid having a temperature higher than a predetermined temperature flows into the valve chamber, the expansion medium expands and the internal pressure increases, and the diaphragm is displaced in the valve closing direction to close the outlet passage. This prevents the discharge of steam. When a low temperature fluid below a predetermined temperature flows in, the expansion medium contracts and the internal pressure decreases,
The diaphragm is displaced in the valve opening direction to open the lead-out path.
As a result, condensed water and air are discharged outside the system.

[0004]

However, in the heat-actuated steam trap of this type, the discharge capacity is small because the temperature control element only opens and closes a single lead-out path. There was a problem that it was not suitable for discharging a large amount of condensate.

Therefore, a technical problem of the present invention is to provide a heat-actuated steam trap for a large amount capable of discharging a large amount of condensed water.

[0006]

Means for Solving the Problems The technical means of the present invention taken to solve the above-mentioned technical problems are an inlet by valve casing, a valve chamber communicating with the inlet, a first and a second. The temperature control element is formed by forming an outlet communicating with the valve chamber via the two outlet passages, and enclosing an expansion medium between the wall member to which the first valve member is fixed and the diaphragm to which the second valve member is fixed. Displacement between the diaphragm and the wall member due to expansion and contraction of the expansion medium, which is arranged between the two outlet passages and urges the wall member with an elastic member to lock the temperature control element to the stopper portion formed in the valve chamber. According to the present invention, there is a heat-actuated steam trap in which the two outlet paths are opened and closed.

[0007]

The operation of the above technical means is as follows.
When the temperature of the fluid flowing into the valve chamber rises, the expansion medium enclosed between the wall member and the diaphragm expands and the internal pressure increases, and the diaphragm is displaced in the direction of the opposing second outlet path, and the second The valve member closes the second outlet path. Subsequently, the wall member is displaced in the direction of the first lead-out passage facing the wall member against the biasing force of the elastic member, and the first valve member closes the first lead-out passage. When the temperature of the fluid flowing into the valve chamber becomes lower, the expansion medium contracts and the internal pressure decreases, and the wall member is displaced in the valve opening direction by the urging force of the elastic member and the first valve member is first led out. Open the road. Subsequently, the diaphragm is displaced in the valve opening direction and the second
Open the outlet path. In this way, since the two outlet paths are opened and closed by the temperature control element, the discharge capacity can be increased,
A large amount of condensate can be discharged. Further, since the two outlet paths are not opened and closed at the same time, there is no danger of causing a water hammer due to the rapid flow of fluid accompanying the on-off valve.

[0008]

EXAMPLE An example showing a concrete example of the above technical means will be described (see FIG. 1). The main body 1 and the end member 2 are connected with a bolt (not shown) to form a valve casing having a valve chamber 3 inside. An inlet 4 is formed in the end member 2, and the body 1
An inlet 5 is formed coaxially with the inlet 4. Entrance 4
Communicate with the valve chamber 3 through inflow passages 6 and 7 formed in the main body 1.

A first valve seat member 9 having a first lead-out passage 8 and a second valve seat member 11 having a second lead-out passage 10 are coaxially arranged in a partition wall between the valve chamber 3 and the outlet 5. It is screwed. The valve chamber 3 communicates with the outlet 5 from the first and second outlet passages 8 and 10 through the outside of the partition wall.

A temperature control element 12 is arranged between the first valve seat member 9 and the second valve seat member 11. The temperature control element 12 is one in which the expansion medium 15 is enclosed in an internal space formed by fixing the outer peripheral edge of the wall member 13 and the outer peripheral edge of the diaphragm 14. The expansion medium 15 is formed of water, a liquid having a boiling point lower than that of water, or a mixture thereof. Wall member 1
A first valve member 16 for opening and closing the first lead-out passage 8 is fixed to the center of the valve 3, and a second lead-out passage 10 is provided to the center of the diaphragm 14.
The second valve member 17 for opening and closing is fixed. Further, the outer peripheral edge of the diaphragm 14 is fixed to the outer peripheral edge of a fixed wall member 18 having an opening at the center through which the second valve member 17 enters and exits. The temperature control element 12 includes a coil spring 19 as an elastic member arranged between the main body 1 and the wall member 13.
Is urged to the right by, and the outer peripheral right side surface of the fixed wall member 18 is locked to the stopper portion 20 formed on the main body 1.

When the temperature of the fluid flowing into the valve chamber 3 rises, the expansion medium 15 enclosed between the wall member 13 and the diaphragm 14 expands to increase the internal pressure. Then, first, the second valve seat member 11 facing the diaphragm 14
It is displaced to the side, and the second valve member 17 closes the second outlet passage 10. Subsequently, in the state where the second valve member 17 closes the second outlet passage 10, the temperature control element 12 is displaced toward the first valve seat member 9 side against the biasing force of the coil spring 19, and the fixed wall member 18 is provided. Moves away from the stopper portion 20 and closes the first outlet passage 8 with the first valve member 16. When the temperature of the fluid flowing into the valve chamber 3 decreases, the expansion medium 15 contracts and the internal pressure decreases. Then, first, the wall member 13 and the fixed wall member 18 are displaced in the direction of the stopper portion 20 by the biasing force of the coil spring 19, the first valve member 16 opens the first lead-out passage 8, and the fixed wall member 18 stops. Abut the part 20. Subsequently, the diaphragm 14 is displaced in the valve opening direction and the second valve member 17 opens the second lead-out path 10.

[0012]

The present invention produces the following unique effects. As described above, according to the present invention, since the two outlet passages can be opened and closed by the temperature control element, a large amount of condensed water can be discharged, and a large amount of heat-responsive steam trap can be provided.
In addition, since the two temperature control elements can open and close the two outlets in sequence, it is possible to prevent the rapid flow of fluid associated with the on-off valve, and to provide a thermally responsive steam trap that does not cause water hammer. Can be provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a heat-actuated steam trap according to an embodiment of the present invention.

[Explanation of symbols]

 1 Main Body 2 End Member 3 Valve Chamber 4 Inlet 5 Outlet 8 First Outlet Path 10 Second Outlet Path 12 Temperature Control Element 13 Wall Member 14 Diaphragm 15 Expansion Medium 16 First Valve Member 17 Second Valve Member 19 Coil Spring 20 Stopper -Part

Claims (1)

[Claims] 1. A valve casing forms an inlet, a valve chamber communicating with the inlet, and an outlet communicating with the valve chamber via two first and second outlet passages, and the first valve member is fixed. A temperature control element in which an expansion medium is enclosed between the wall member and the diaphragm to which the second valve member is fixed is disposed between the two outlet passages, and the wall member is biased by the elastic member to control the temperature control element. Is engaged with a stopper portion formed in the valve chamber, and the two lead-out passages are opened and closed by the displacement of the diaphragm and the wall member due to the expansion and contraction of the expansion medium. .