JPS60155097A - Temperature regulating trap for heated water tank - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The technical developments described herein regarding temperature control traps for heated water tanks were first developed by the applicant for steam heating of so-called trace piping, and have been widely used due to their superior temperature control function. It is related to the application of temperature-controlled traps that have come to be used as prizes, especially the concept of adapting them to effective use in heated water tanks.

Generally, piping such as a so-called serpentine pipe is installed in the heating water tank.
In hot water facilities that heat cold water supplied to a water tank by passing steam through it, a trap is used to discharge condensate generated by heat exchange with the water supply.

If a so-called temperature control trap is used as this trap,
While there is an advantage in that the sensible heat of high-temperature condensate is effectively used, due to the rapid increase in heat removal when the electricity used for hot water supply increases, the thermal response operation of the temperature control trap cannot follow it, and the hot water supply temperature decreases. Don't let the descent go without feeling happy.

The purpose of this proposal is to effectively solve these problems and thereby realize constant temperature hot water supply.

Here, the valve closing force based on the trap internal pressure acting on the main valve is controlled by the difference in corresponding thrust between the bimetal column and the coil spring, blocking the release of high-temperature condensate and selectively releasing low-temperature condensate. By providing a variable flow path that controls constant discharge of a flow section sufficient to compensate for the necessary condensate temperature in the heating water tank in which the sensible heat of the condensate is to be used, the temperature control trap 17 that controls the condensate 11 targets are effectively achieved.

This variable flow path may share a trap valve port for selective release of low temperature condensate, or may be a bypass for the trap valve port.

Now, 1st U'! I shows the entire cross section of a trap for a specific example of the above configuration, and in the figure, 1 is the trap body, 2.3 is an inlet 1, an outlet 1, and 1 is a bonnet.

Although not shown, the inlet 2 is connected to a heating pipe in the heating water tank, and the outlet 3 is, of course, opened to a drain or connected to a return pipe to the boiler.

A valve seat width G is provided on the partition wall 5 between the main valve and the outlet 2.3 of the trap body 1, and the valve and the lower part are used to open the main valve and the main valve in this example. (as a ball valve)).

The ball valve 8 is a valve holder 1) that can be slid up and down within the valve seat muscle 6.
If we consider the closed posture of Yl) held at the end face of the ball valve 8, preferably with a removable crimping, and λ-j on the valve lower of the ball valve 8, the pressure on the person 1''2 side and 11, mouth + u
It is clear that the pressure difference between +1311L11 produces a scorching closing force on the ball valve 8.

Benbolda on the other hand? If we form a 7-run 10 above the gap 10 and place a fill spring 11 between this and the gap v5, and use its elastic force to overcome the valve-closing force described above, then this The valve opening position of the ball valve 3 is secured by the thrust of J2. On the other hand, a bimetallic flannel, 13, is attached to the valve hole 9 between it and a reduction rod 12 that is screwed into the top of the bonnets 1 and 4. , by using that thermal expansion force to resist the above-mentioned force, the ball valve increases to the difference between the thrust of the bimetal column according to the temperature inside the bonnet and the thrust of the coil bone that resists this. By controlling the opening and closing of the valve, it is possible to selectively release low-temperature condensate water while preventing the release of high-temperature water.

In the figure, 14 is a stem, 15 is a bush □, 16 is a retaining ring, and 17 is a lock nut, IS key A, and a pump.

Under this configuration, upon arrival of high-temperature condensate, the elongation of the bimetallic column 13 overwhelms the filter and causes the valve to close according to the pressure difference in the ball valve 8. It is clear that the valve remains closed for a period of time until the water temperature releases the expansion of the bimetal column, but if the flow rate of hot water in the heating tank connected to the inlet 2 side suddenly increases, As the amount of water supplied increases, heat is absorbed from the heating condensate in the heating pipe, and as long as the valve is kept closed, the hot water temperature is forced to decrease.

In order to solve such problems, for example,
In the example shown in the figure, a plaque 9 is pushed into the bottom of the trap body 1, and a push rod 20 that can pass through the entire valve lower into the ball valve 8 and apply a pushing force is inserted into it to open the intermediate lower. This will slightly open the discharge passage through which it passes.

In this way, the inside of the bonnet 4 is filled with high-temperature condensate.
4, the ball valve 8 is not fully closed, and therefore, when the heat removal in the hot water tank increases, a contraction response of the bimetal column is brought about, and an inadvertent drop in the hot water temperature is prevented. Prevented.

Here, the opening of the discharge passage with the push rod 20 leads to a steady discharge of the flowmeter sufficient to compensate for the necessary condensation water temperature in the piping in the heating tank. It's fine if you can.

In the figure, 21 is the O-ring of the push rod, and 22 is the lock nut.

Next, FIG. 2 shows a case in which the pushbutton 20 is not used, and in this example, a hollow conical valve 8'' is fitted to the intervening holder 9 instead of the ball valve. An auxiliary valve 24 facing the hollow hole 23 may be provided so as to form a variable flow path between it and the hollow hole 23, and the two main auxiliary valves 24 may be in the form of a knee-V valve as shown in FIG.

In each case, the bimetallic flammable membrane 1 of FIG.
It is clear that the response of 3 can be speeded up.

As described above, there are problems in using the temperature control trap to control the passage of heating steam in the heating water tank and utilizing the sensible heat of the high-temperature condensate. The temperature drop can be appropriately avoided.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the embodiment, FIG. 2 is a cross-sectional view of the main part of a modified embodiment, and FIG. 3 is a cross-sectional view of the main part of yet another embodiment. 11...Coil spring 13...Bimetal column 8
．． 8゛... Main valve 23... Variable flow ``Name of each patent applicant Miyawaki Steam Trap Manufacturing Co., Ltd. = 7- Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A temperature control trap that controls the valve closing force based on the trap internal pressure that acts on the main valve using the difference in opposing thrust between the bimetal column and the coil spring, blocks the release of high temperature condensate, and controls the selective release of low temperature condensate. Temperature control for a heating water tank, which uses the sensible heat of the condensate and is equipped with a variable flow path that controls constant discharge of a flow rate sufficient to compensate for the necessary condensate temperature in the heating water tank. trap.