JPH063274Y2 - Casing of temperature control trap - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) A thin copper pipe with an outer diameter of about several mm is used for heat insulation in oil transmission pipelines and their accessories in oil refining facilities. It is often installed for tracing steam, and the warming effect is fulfilled by draining only the condensate that has cooled to below a specified temperature due to condensation of the warming steam at the end of such a trace pipe. As a typical example,
The usefulness of the temperature control trap in terms of heat management and heat economy is widely recognized.

The temperature control trap is an example in which a scale that arrives at the inlet side together with the condensate is provided with a strainer in the condensate reservoir against pleats that impair the trap function. If stagnation of scale occurs in this strainer, the inflow of condensate is hindered and the conduction in the small-diameter trace pipe is obstructed,
As a result, it is feared that the trace function may be impaired, but such stagnation of scale often does not cause a problem depending on the condition of the trace piping.

Therefore, it may be possible to perform simple cleaning on the strainer, but it is advantageous to use a temperature control trap that is suitable even when the constraint on the mounting posture of the trap due to it is more important than the need for strainer cleaning. The casing is proposed here.

(Prior Art) Generally, in steam traps, it has become common practice to provide a shutoff valve in the bypass connecting the inlet side and the outlet side in order to blow off the upstream side pipe, and to open this shutoff valve in a timely manner. .

However, for small-diameter trace pipes, the simplification of the piping system is required, so such a bypass is not appropriate, and the strainer is not sufficiently cleaned depending on the blow-off through the bypass. Hard to understand.

On the other hand, according to Japanese Patent Laid-Open No. 48-94016, it is disclosed that a scale reservoir is formed outside the screen as a strainer of a steam trap, and a blow-off valve is arranged facing the scale reservoir. Since the re-evaporation pressure of the condensate inside is used, it is not suitable for cleaning the inside of the pipe upstream of the trap.

According to Japanese Utility Model Laid-Open No. 48-822, a so-called thermodynamic disk type steam trap is equipped with a strainer at a branch hole for its inflow hole, and its insertion side end serves as a dust collecting chamber, and the dust collecting chamber and the drain. Although the opening and closing of the bypass passage to and from the outflow hole is disclosed, proper cleaning is also difficult due to the narrowed passage in the bypass passage.

(Problems to be solved by the invention) The temperature control trap has a feature that it is particularly small and that the drainage temperature of the condensate water can be finely adjusted accurately and easily. In connection with uses such as temperature control, taking into consideration that the trap inlet side pipe is thin, and that the scale sometimes accompanied during condensate flow is apt to stagnate in the trap strainer,
While allowing the strainer to be easily and properly cleaned without damaging the above characteristics, the strainer cleaning is virtually unnecessary due to the material and condition of the trace pipe, and rather drainage derived from the pipe connection for that purpose. It is an object of the present invention to propose a casing of a temperature control trap, which is designed to be adapted even when the change of direction is inconvenient.

(Means for Solving the Problem) The present invention provides a temperature-sensing unit that expands and contracts in response to the condensate temperature, a valve element that follows the operation of the temperature-sensing unit, and an opening and closing of a valve opening by the valve element. The inside of the condensate reservoir has a condensate reservoir with a built-in condensate exclusion mechanism consisting of a valve seat and a cylindrical strainer that surrounds the condensate exclusion mechanism inside the condensate reservoir. On the other hand, in a temperature control trap that has an inlet pipe connection port that communicates via a strainer and an outlet pipe connection port that also communicates via a valve port, face the inlet pipe connection port across the condensate reservoir. A casing for a temperature control trap, which is equipped with an additional connection port that can be selectively opened to the condensate reservoir and the outlet side pipe connection port at a matching position, where the additional connection port serves as the condensate reservoir. During normal operation of the trap It can be said that it is closed by the damming means and that the additional connection port is opened to the outlet side pipe connection port blinded by the plug.

FIG. 1 illustrates a concrete example of a casing of a temperature control trap according to the present invention, in which 1 is an inlet side pipe connection port (hereinafter simply referred to as an inlet) and 2 is an outlet side pipe connection port (hereinafter simply referred to as an outlet).
3 is an additional connection port, 4 is a cylindrical strainer, and 5 is a closing element such as a blocking or partitioning means shown in the example of a so-called cock.

The casing has a condensate reservoir 6 which is in direct communication with the inlet 1, and the condensate reservoir 6 houses a condensate selective removal mechanism 7.

The condensate selection / exclusion mechanism 7 is a temperature-sensing unit 8 that expands and contracts in response to the condensate temperature, which is a bimetal column, that is, a pair of bimetal discs, as is well known for this type of temperature control trap. Was used for opening and closing the valve body 9 and the valve element 9 that follows the operation of the temperature-sensing unit 8 and the laminated body through a plurality of pairs of washers with their low thermal expansion sides facing inward. The valve element 9 is mainly composed of the valve seat 11, and the valve element 9 is adapted to engage the snap ring 12 at an intermediate portion of the stem passing through the guide hole of the valve seat 11 and further extend through the bimetal column. A spring seat 13 having an idle restraining portion that loosely sandwiches the snap ring 12 vertically is loosely fitted to this stem, and a coil spring 14 is interposed between the spring seat 13 and the valve seat 11 to create a feeling generated in the bimetal column. To counter the hot thrust.

The condensate reservoir 6 is closed by a cover 15 that suppresses the cylindrical strainer 4 surrounding the condensate selective removal mechanism 7 described above, the adjusting rod 16 is screwed into the center of the cover 15, and the bimetal is formed at the lower end thereof. The position of the upper end of the column is controlled, and the blind hole opened at the lower end of the adjusting rod 16 serves to maintain the concentricity of the upper end of the stem of the valve element 9.

In the figure, 17 is a lock nut, 18 is a cap, and 19 is a valve seat.
11 horizontal through holes.

According to the present invention, the casing shown in FIG. 1 has a drainage hole in which an outlet 2'opposed to an inlet 1 in the conventional temperature control trap shown in FIG. 2 opens downwardly of a valve seat 11. It is different only in that it has 20 and has been replaced with the additional connection port 3 that directly opens to the condensate reservoir 6, and instead has the outlet 2 directly below the valve seat 11. As shown in FIG. 3, the additional connection port 3 is blocked by the embolus 21, or by omitting the drilling process of the opening hole 22 toward the condensate reservoir 6, the direction of the outlet 2 becomes downward in the drawing. It can be used in the same manner as the conventional type shown in FIG. 2, and instead of the opening hole 22, a drainage hole 20 'is drilled as shown at 20 in FIG. 2 and the outlet 2 is closed with a plug 21'. If it is stopped and the additional connection port 3 is diverted to the outlet 2, it will be used in the same form as in the case of Fig. 2 including the direction of drainage. It is also possible.

That is, the additional connection port 3 can be selectively used for blow-off for cleaning the strainer 4 or discharging condensate.

(Action) As is already well known as the trap action by the condensate selection and elimination mechanism 7, a large amount of condensate is generated in the pipe system air by the heat removal of the pipe itself when steam is supplied to the pipe system. It follows that the bimetal column contracts at this time, but the coil spring 14 lifts the valve element 9 through the spring seat 13 and the snap ring 12 and the valve port 10 is open. The initial condensate of is eliminated.

As a result, the temperature of the piping system gradually rises, and the condensate temperature rises accordingly, so that the bimetal column expands and displaces in the condensate reservoir 6, and the coil spring 14 is compressed. 9 closes the valve opening 10 at a predetermined temperature.

The closing operating temperature, that is, the condensate condensate temperature is set by the adjustment rod.
It is variable by changing the screwing allowance of 16.

When the condensate temperature in the condensate reservoir 6 decreases, the bimetal column contracts in response to this, and the repulsive force of the coil spring 14 causes the valve element 9 to open again and the condensate that has cooled is removed.

The above operation is repeated depending on the temperature state of the condensate flowing from the inlet 1 into the condensate sump 6, or sometimes the continuous discharge of the flowing water at a predetermined temperature or lower is performed.

During the condensate removal, the scale in the piping system that is contaminated by the condensate interferes with the trap operation and is filtered off by the strainer 4, which does not hinder the operation of the condensate removal mechanism. If the deposition and deposition of kale on the outer periphery occurs, the inflow into the condensate reservoir 6 may be hindered and the trap function may be impaired. Further, if this deposition proceeds excessively, it may reach the small-diameter inlet pipe, There is also a disadvantage that it obstructs the circulation of the temperature control medium.

In the casing of the temperature control trap according to this invention,
At any time during the operation of the inlet side piping system, particularly preferably at the initial stage of ventilation, the outer circumference of the strainer 4 is directly opened from the upstream side pipe by fully opening the damming means of the additional connection port 3 shown in the example of the cock in FIG. The scale on the outer surface of the strainer 4 is washed away by the condensate flushing flow 23 that branches and sweeps over almost half a round, and even the fine scale that has passed through the strainer 4 is sucked from the inner surface of the strainer 4 by the flushing flow 23 as shown by arrow 24. It is taken out and released together. Needless to say, thereafter, the steady trap function is restored by closing the cock 5.

The casing of the temperature control trap of this invention has an additional connection port 3
The opening of the through hole 22 communicating with the condensate reservoir 6 may be opened when the intended use for removing the scale on the outer circumference of the strainer 4 is determined, and there is no fear of scale stagnation. Occasionally, if the above-mentioned perforation is not performed, or if it is opened, it will be possible to eliminate the necessary condensate between the inlet 1 and the outlet 2 by closing it with a blocking plug (not shown). 2nd instead of 22
A drain hole 20 'similar to the drain hole 20 shown in the figure is bored as shown in FIG. 4, and the outlet hole 2 is closed with a blocking plug 21', so that the additional connection port 3 is used as the outlet 2. Drainage can be performed in the same direction as the conventional temperature control trap shown in FIG.

Example FIG. 6 shows an example in which the temperature control trap according to the present invention is installed at the end of the trace pipe 26 surrounding the oil feed pipe 25 in a spiral shape, and FIG. 7 also shows the oil feed pipe 25 and its instrument. The example in which the temperature control trap according to the present invention is installed at the end of the trace pipe 26, which is a detour pipe around the pipe 27, the branch pipes 25a and 25b, and their respective control valves 28a and 28b, is illustrated. And the general direction of condensate removal, and the outline arrow shows the direction of flushing flow.

(Effect of the device) According to this device, the drainage path is oriented more than the need when the strainer that is glad to deposit and accumulate on the strainer, which the temperature control trap is essential for its function, needs to be removed. The convenience of use of the trap casing can be extended in that an advantageous fit can be achieved even when more important.

[Brief description of drawings]

 FIG. 1 is a sectional view of an embodiment, FIG. 2 is a sectional view of a conventional example, FIG. 3 is an explanatory view of another usage state, FIG. 4 is an explanatory view of another usage state, and FIG. It is a figure, and Drawing 6 and Drawing 7 are explanatory views of a use state. DESCRIPTION OF SYMBOLS 1 ... Inlet side pipe connection port, 2 ... Outlet side pipe connection port 3 ... Additional connection port, 4 ... Strainer 5 ... Damming means, 6 ... Condensate reservoir 7 ... Condensate selective exclusion mechanism 8 ... Temperature sensing unit, 9 … Valve element 10… Valve, 11… Valve seat

Front page continuation (72) Inventor Yuji Takamatsu 25-1, Masago-cho, Tomakomai-shi, Hokkaido Inside Idemitsu Kosan Co., Ltd. Hokkaido Refinery (72) Inventor Yoshiyuki Nakajima 25-1, Masago-cho, Tomakomai-shi, Hokkaido Inside Idemitsu Kosan Co., Ltd. Hokkaido Refinery (72) Inventor Hiroshi Takezawa 25-1 Masagomachi, Tomakomai City, Hokkaido Inside Idemitsu Kosan Co., Ltd., Hokkaido Refinery (72) Inventor Hideo Ogura 2-3-1 Tagawakita, Yodogawa-ku, Osaka City, Osaka Prefecture Miyawaki Co., Ltd. ( 56) References Japanese Unexamined Patent Publication No. 61-13096 (JP, A) Actually opened 48-822 (JP, U) Actually opened 53-76326 (JP, U)

Claims (3)

[Scope of utility model registration request] 1. A recovery unit comprising a temperature-sensitive unit that expands and contracts in response to the condensate temperature, a valve element that follows the operation of the temperature-sensitive unit, and a valve seat that is used to open and close a valve opening by the valve element. It has a condensate reservoir with a built-in selective exclusion mechanism for water, and a cylindrical strainer that surrounds the selective exclusion mechanism inside this condensate reservoir, and communicates with the inside of the condensate reservoir through a strainer. In the casing of the temperature control trap, which has an inlet pipe connection port and an outlet pipe connection port that also communicates via the valve port, place the condensate reservoir at a position facing the inlet pipe connection port. A casing for a temperature control trap, which is provided with an additional connection port that can be selectively opened to the water reservoir and the outlet side pipe connection port. 2. The casing of the temperature control trap according to claim 1, wherein the additional connection port is opened toward the condensate reservoir and is closed by the damming means during the steady operation of the trap. 3. The casing of the temperature control trap according to claim 1, wherein the additional connection port is opened to the outlet side pipe connection port blinded by an embolus.