JP6086457B2 - Strainer cleaning device - Google Patents

Description

  The present invention relates to a strainer cleaning device that enables easy cleaning of a strainer. The strainer targeted by the apparatus of the present invention includes a strainer incorporated in a steam trap and a Y-type strainer.

  A strainer that removes foreign matters such as dust in a fluid (liquid, gas, vapor) is known as an indispensable device in piping system facilities.

  In factories and the like, steam is used for various purposes such as heating and a power source. In such a case, steam supply equipment is installed to supply steam generated by a boiler to a place of use. The steam condenses to drain when it releases latent heat, but if the generated drain is left in the steam supply facility, it becomes wet steam and various obstacles occur, so it is desirable to remove the drain quickly. . For this purpose, a steam trap is usually installed in the steam supply facility.

  When a steam trap is installed, a trap inlet valve, a trap outlet valve, a bypass valve, and a strainer are generally installed around the steam trap to facilitate maintenance and the like (see FIG. 7). . The trap inlet valve is used to temporarily close the inflow of steam for disassembling and replacing parts.The trap outlet valve is used to remove steam and drain from the outlet side of the steam trap when a drain recovery circuit is formed. This is for temporarily closing the inflow and disassembling or replacing parts. Also, if the trap inlet valve and trap outlet valve are closed, drainage from the steam trap will not be possible, but by opening the bypass valve, drainage can be drained and the steam trap can be disassembled or parts replaced. it can. Furthermore, when foreign matter such as rust or scale flows into the steam trap, it may cause an operational failure. However, the occurrence of an operational failure is prevented by providing a strainer to capture the foreign matter.

  Moreover, in a general piping system, a Y-shaped strainer is installed at a desired location in order to remove dust in the fluid.

  As described above, foreign matter is captured by the strainer and the Y-type strainer installed around the steam trap, and therefore, the foreign matter must be periodically cleaned to remove the foreign matter. However, there is a harmful effect that it takes time to remove the foreign matter. On the other hand, neglecting to clean the strainer may cause a malfunction of the steam trap and the piping system.

  The present invention has been developed in view of such circumstances, and an object of the present invention is to provide an apparatus that enables easy cleaning of a strainer and a Y-strainer built in a steam trap.

  A main body having an inflow port and an outflow port, a valve seat disposed in the main body, a disk seated on the valve seat, and a midway from the inflow port to the valve seat. An apparatus for cleaning the strainer of a disc-bimetal type steam trap built in a steam pipe and having a strainer arranged is attached to the end of the strainer opposite to the inlet, so as to communicate with the strainer. And an open / close valve installed in the middle of the pipe, and the end of the pipe opposite to the strainer is connected to the downstream side of the steam pipe, and also serves as a bypass valve. It is a feature.

  According to the strainer cleaning device of the present invention, the strainer can be easily cleaned only by opening the on-off valve. Since the strainer cleaning device of the present invention can be easily manufactured by remodeling an existing strainer built-in disk bimetal type steam trap or Y-type strainer, the manufacturing cost is low. In addition, the strainer cleaning device of the present invention has a simple structure, so that maintenance is easy. Furthermore, in the form which forms a bypass path among the strainer cleaning apparatuses which concern on the 1st Embodiment of this invention, since the apparatus itself becomes a bypass path, it is not necessary to form a bypass path newly.

It is the figure which showed the example in which the strainer cleaning apparatus which concerns on the 1st Embodiment of this invention is integrated in the steam piping extended in the horizontal direction. It is an expanded sectional view of the part 2 of FIG. It is a series of figures which showed the action | operation of the strainer cleaning apparatus of FIG. 4A is a view showing an example in which the strainer cleaning device of FIG. 1 is incorporated in a vertically extending piping facility, and FIGS. 4B and 4C are pipes of the strainer cleaning device. It is the figure which showed the form which is open | released outside. It is an expanded sectional view of the strainer cleaning device concerning a 2nd embodiment of the present invention. It is the figure which showed the action | operation of the strainer cleaning apparatus of FIG. It is the figure which showed the example of the conventional piping installation around a steam trap.

  Next, a strainer cleaning device according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. First, the strainer cleaning device built in the steam trap according to the first embodiment of the present invention will be described. FIG. 1 is a view showing an example in which the strainer cleaning device according to the first embodiment of the present invention is incorporated in a steam pipe extending in the horizontal direction. In FIG. 1, reference numeral 10 indicates a steam trap, and FIG. 2 is an enlarged view of a portion 2 of FIG.

  The steam trap 10 includes a body 12 having an inlet 12a and an outlet 12b, a valve seat 14 disposed in the body 12, a disk 16 seated on the valve seat, and a bimetal attached adjacent to the valve seat 14. The ring 18 is provided, and when the temperature in the main body 12 is below a certain value, the bimetal ring 18 contracts to raise the disk 16, and when the temperature in the body 12 is above a certain value, the bimetal ring 18 is provided. Is enlarged, and the disk 16 is lowered to be seated on the valve seat 14. A heat insulating cover 20 is disposed above the main body 12, and a strainer 22 is disposed on the way from the inlet 12 a to the valve seat 14. The structure of the steam trap 10 described above is a known structure called a strainer built-in disk bimetal steam trap.

  The strainer cleaning device 30 according to the first embodiment of the present invention is installed in the middle of the pipe 32, which is attached to the end 22 a opposite to the inlet 12 a of the strainer 22 so as to communicate with the strainer 22. The on-off valve 34 is provided. The end 32a of the pipe 32 opposite to the strainer 22 is connected to the downstream side of the steam pipe. As shown in FIG. 1, the pipe 32 forms a bypass path of the steam pipe. As the pipe 32, a copper pipe is usually used. Preferably, the pipe 32 is provided with an inspection valve 36 between the on-off valve 34 and the end 32a.

  Next, the operation of the steam trap 10 and the strainer cleaning device 30 configured as described above will be described with reference to FIG. During normal use of the steam trap 10, the on-off valve 34 is closed. Before the steam is supplied to the steam pipe, the inside of the main body 12 of the steam trap 10 is at a low temperature. Therefore, the bimetal ring 18 is contracted to raise the disk 16 and open (FIG. 3A). )reference). As a result, a large amount of air or cold water in the steam pipe is discharged from the steam trap device 10. When the drainage is completed and the steam flows into the steam trap 10, the bimetal ring 18 expands and expands, the disk 16 is lowered and seated on the valve seat 14, and the valve is closed. It passes (see FIG. 3B). And when drain flows in, it will be in a valve opening state again, and drain will be discharged. In this way, the drain is automatically discharged intermittently with the valve open / closed. The above operation is the same as that of the conventional disk bimetal type steam trap.

  When the steam is continuously supplied, foreign matter such as rust and scale mixed in the steam flows into the steam trap 10 and is gradually captured by the strainer 22. Therefore, the on-off valve 34 is appropriately opened while the valve 36 is closed. When the on-off valve 34 is opened, the steam flowing in from the inlet 12a flows into the pipe 32 and is released from the on-off valve 34 to the outside. At that time, the foreign matter captured by the strainer 22 is also released. Thus, the strainer 22 can be easily cleaned as long as the on-off valve 34 is operated.

  In the example shown in FIG. 1, the steam pipe extends in the horizontal direction, but the steam trap 10 and the strainer cleaning device 30 may be incorporated in the steam pipe extending in the vertical direction (see FIG. 4A).

  In the above example, the end 32a of the pipe 32 is connected to the downstream side of the steam pipe to form a bypass path. However, the end 32a of the pipe 32 may be opened without being connected to the steam pipe. (See FIGS. 4B and 4C). In the form in which the end 32a of the pipe 32 is open, steam is released to the outside when the on-off valve 34 is opened. For example, when the equipment is outdoors or semi-indoors such as a concrete manufacturing factory, A form may be adopted.

  Next, a strainer cleaning device according to the second embodiment of the present invention will be described. FIG. 5 is an enlarged cross-sectional view showing a strainer cleaning device according to the second embodiment of the present invention. The Y-type strainer 40 equipped with the strainer cleaning device according to the second embodiment of the present invention includes a main body 42 having an inlet 42a, an outlet 42b, and a branch path 42c, and the strainer 44 is provided in the branch path 42c. Is arranged, and the tip of the branch path 42c is closed with a cap 42d. The configuration of such a Y strainer 40 is substantially the same as that of a known Y strainer.

  The strainer cleaning device 50 according to the second embodiment of the present invention is provided with a hole 42d1 in the cap 42d at the tip of the branch path 42c, and is attached to the cap 42d so as to communicate with the branch path 42c (and hence the strainer 44). A pipe 52 and an on-off valve 54 installed in the pipe are provided.

  The operation of the strainer cleaning device 50 configured as described above will be described with reference to FIG. During normal operation of the piping system, the open / close valve 54 of the strainer cleaning device 50 is closed (see FIG. 6A). Then, the fluid flowing in from the inflow port 42a flows out of the outflow port 42b through the strainer 44. At that time, foreign matters in the fluid are captured by the strainer 44. On the other hand, when the strainer 44 is cleaned, the open / close valve 54 of the strainer cleaning device 50 is opened (see FIG. 6B). Then, the fluid that has flowed in from the inlet 42a flows out of the pipe 52 through the strainer 44. At this time, the foreign matter trapped in the strainer 44 is also removed from the strainer 44 due to the pressure of the fluid. Accordingly, the foreign matter captured by the strainer 44 can be easily removed. The strainer cleaning device 50 also has secondary effects of confirmation of test water and analysis of fluid (confirmation of whether or not fluid is flowing through the piping system and analysis of fluid).

  The Y-type strainer 40 equipped with the strainer cleaning device 50 according to the second embodiment of the present invention is used to remove foreign substances in liquid, gas, and vapor.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, it is something.

  For example, the shape, dimensions, and the like of the illustrated main body 12 are merely examples, and shapes, dimensions, and the like other than those illustrated may be adopted.

DESCRIPTION OF SYMBOLS 10 Steam trap 12 Main body 12a Inlet 12b Outlet 14 Valve seat 16 Disc 18 Bimetal ring 20 Thermal insulation cover 22 Strainer 30 Strainer cleaning apparatus (1st Embodiment)
32 pipe 34 on-off valve 36 valve 40 Y-shaped strainer 42 body 42a inflow port 42b outflow port 42c branching path 42d cap 42d1 hole 44 strainer 50 strainer cleaning device (second embodiment)
52 Pipe 54 On-off valve

Claims (1)

A main body having an inlet and an outlet; a valve seat disposed in the main body; a disk seated on the valve seat; and a strainer disposed on the way from the inlet to the valve seat. An apparatus for cleaning the strainer of a disc bimetal type steam trap incorporated in a pipe,
A tube attached to the end of the strainer opposite the inlet to communicate with the strainer;
An on-off valve installed in the middle of the pipe,
The apparatus is characterized in that an end of the pipe opposite to the strainer is connected to a downstream side of the steam pipe.

Images