JP2012021603A - Heat responding steam trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat responding steam trap in which first and second diaphragms can open first and second outlet channels, respectively.SOLUTION: The trap includes: forming an inlet 4, a valve chamber 3 communicating with the inlet 4, and the outlet 5 communicating with the valve chamber 3 via the first outlet channel 8 and the second outlet channel 10 by valve casings 1, 2; sealing an expandable medium 16 in the inside space between the first diaphragm 14 and the second diaphragm 15; arranging the stopper member 21 regulating the displacement not less than predetermined displacement in the direction opening the valves of the first diaphragm 14 opening the first outlet channel 8 and the second diaphragm 15 opening the second outlet channel 10 between the first outlet channel 8 and the second outlet channel 10 of the temperature control element 12 arranged in the inside space between the first diaphragm 14 and the second diaphragm 15; and opening and closing the first outlet channel 8 and the second outlet channel 10 by the displacement of the first diaphragm 14 and the second diaphragm 15 by the expansion and contraction of the expandable medium 16.

Description

The present invention uses a temperature control element including a medium that is heated and cooled by steam and condensate and expands and contracts according to the temperature, and automatically discharges condensate generated in various steam-using devices and steam pipes. The present invention relates to a responsive steam trap, and more particularly to a heat responsive steam trap that can discharge a large amount of condensate.

A conventional thermally responsive steam trap is disclosed in Patent Document 1, for example. This forms an inlet in the valve casing, a valve chamber communicating with the inlet, and an outlet communicating with the valve chamber via the first outlet passage and the second outlet passage, and is provided between the first diaphragm and the second diaphragm. A temperature control element in which the expansion medium is sealed in the space is disposed between the first lead-out path and the second lead-out path, and the first lead-out path and the second lead-out path are caused by the displacement of the first diaphragm and the second diaphragm due to the expansion and contraction of the expansion medium. The lead-out path is opened and closed.

JP-A-7-310893

In the conventional thermoresponsive steam trap, when a high-temperature fluid having a predetermined temperature or more flows into the valve chamber, the expansion medium expands, and the first diaphragm and the second diaphragm pass through the first outlet path and the second outlet path, respectively. When the low temperature fluid below the predetermined temperature flows in, the expansion medium contracts, and the first diaphragm and the second diaphragm open the first outlet path and the second outlet path, respectively, by the temperature control element. Opening and closing the first lead-out path and the second lead-out path is excellent in that the discharge capacity can be increased and a large amount of condensate can be discharged. However, when the expansion medium contracts and the internal pressure of the internal space decreases. When only one diaphragm that opens one outlet passage is further displaced in the valve opening direction and the other diaphragm cannot open the other outlet passage, there is a problem that a large amount of condensate cannot be discharged.

Therefore, the problem to be solved by the present invention is to provide a thermally responsive steam trap in which the first diaphragm and the second diaphragm can reliably open the first lead-out path and the second lead-out path, respectively.

In order to solve the above-mentioned problems, the thermally responsive steam trap of the present invention communicates with the valve chamber via the inlet through the valve casing, the valve chamber communicating with the inlet, the first outlet passage and the second outlet passage. An outlet is formed, an expansion medium is sealed in an internal space between the first diaphragm and the second diaphragm, and the first diaphragm opening the first lead-out path and the second diaphragm opening the second lead-out path in the valve opening direction A temperature control element provided with a stopper member for restricting a predetermined displacement or more in the internal space between the first diaphragm and the second diaphragm is disposed between the first lead-out path and the second lead-out path, and the expansion of the expansion medium The first lead-out path and the second lead-out path are opened and closed by the displacement of the first diaphragm and the second diaphragm due to the contraction.

According to the present invention, the first diaphragm and the second diaphragm are stopper members for restricting a predetermined displacement or more in the valve opening direction of the first diaphragm that opens the first lead-out path and the second diaphragm that opens the second lead-out path. Therefore, it is possible to prevent only one of the diaphragms opening one of the outlet passages from being further displaced in the valve opening direction, and the first diaphragm and the second diaphragm are surely each of the first diaphragm and the first diaphragm. There is an effect that the lead-out path and the second lead-out path can be opened.

It is sectional drawing of the thermally responsive steam trap concerning embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIG. The main body 1 and the end member 2 are connected with bolts (not shown) to form a valve casing having a valve chamber 3 therein. An inlet 4 is formed in the end member 2, and an outlet 5 coaxial with the inlet 4 is formed in the main body 1. The inlet 4 communicates 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 path 8 and a second valve seat member 11 having a second lead-out path 10 opened are coaxially screwed to a partition wall between the valve chamber 3 and the outlet 5. ing. The valve chamber 3 communicates with the outlet 5 from the first and second lead-out paths 8 and 10 through the outside of the partition wall.

A temperature control element 12 is disposed between the first valve seat member 9 and the second valve seat member 11 and is held by a spring 13. The temperature control element 12 has a stopper member 21 having an opening in the center between the first and second diaphragms 14 and 15 to fix the outer peripheral edges thereof, and the first and second diaphragms 14 and 15. The expansion medium 16 is sealed in the internal space formed between the two. The stopper member 21 restricts a predetermined displacement or more in the valve opening direction of the first diaphragm 14 opening the first lead-out path 8 and the second diaphragm 15 opening the second lead-out path 10. The expansion medium 16 is formed of water, a liquid having a lower boiling point than water, or a mixture thereof. Valve members 17 and 18 for opening and closing the first and second lead-out paths 8 and 10 are fixed to the first and second diaphragms 14 and 15 at the centers, respectively. The outer peripheral edges of the wall members 19 and 20 having an opening through which the valve members 17 and 18 enter and exit are fixed to the outer peripheral edges of the first and second diaphragms 14 and 15.

The operation of the heat-responsive steam trap is as follows. When the temperature of the fluid flowing into the valve chamber 3 is high, the expansion medium 16 enclosed in the internal space between the first and second diaphragms 14 and 15 expands to increase the internal pressure of the internal space. The first diaphragm 14 is displaced toward the first valve seat member 9 and the valve member 17 closes the first lead-out path 8, and the second diaphragm 15 is displaced toward the second valve seat member 11 and the valve member 18 2 The outlet path 10 is closed.

When the temperature in the valve chamber 3 decreases due to heat radiation or the temperature of the fluid flowing into the valve chamber 3 is low, the expansion medium 16 contracts and the internal pressure in the internal space decreases, and the first and second The diaphragms 14 and 15 move away from the valve seat members 9 and 11, respectively, and the valve members 17 and 18 open the first and second lead-out paths 8 and 10, respectively.

The present invention uses a temperature control element including a medium that is heated and cooled by steam and condensate and expands and contracts according to the temperature, and automatically discharges condensate generated in various steam-using devices and steam pipes. Can be used for responsive steam traps.

DESCRIPTION OF SYMBOLS 1 Main body 2 End member 3 Valve chamber 4 Inlet 5 Outlet 8 1st outlet path 10 2nd outlet path 12 Temperature control element 14 1st diaphragm 15 2nd diaphragm 16 Expansion medium 21 Stopper member

Claims (1)

The valve casing forms an inlet, a valve chamber communicating with the inlet, and an outlet communicating with the valve chamber via the first outlet passage and the second outlet passage, and expands in an internal space between the first diaphragm and the second diaphragm. A stopper member that restricts the displacement of the first diaphragm that opens the first lead-out path and the second diaphragm that opens the second lead-out path from the predetermined direction in the valve opening direction is sealed in the first diaphragm and the second diaphragm. The temperature control element provided in the internal space is disposed between the first lead-out path and the second lead-out path, and the first lead-out path and the second lead-out path are caused by the displacement of the first diaphragm and the second diaphragm due to expansion and contraction of the expansion medium. Thermally responsive steam trap characterized by opening and closing the lead-out path.

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