JP2018079403A - Strainer device - Google Patents

Abstract

When removing a strainer body, the work is simplified and foreign substances can be prevented from passing downstream. A strainer device according to the present invention includes a cup-shaped strainer body having an opening at one end and a bottom at the other end, a straight pipe line, and a circumferential direction of a peripheral wall defining the pipe line. A strainer device, comprising a strainer casing 120 having a part of the strainer body in and out of the part, and a strainer cap 130 capable of closing the part of the entrance / exit window. And the strainer cap can be fixed to each other, and the strainer body is in a state in which the central axis of the strainer body is parallel to the pipeline axis of the pipeline in a state where the strainer body and the strainer cap are fixed to each other in the circumferential direction. Therefore, it can be accommodated in the pipeline and can be taken in and out through the entrance / exit window. [Selection] Figure 4

Description

  The present invention relates to a strainer device that can be suitably disposed in a pipe of a water supply device.

A strainer device for capturing foreign matter contained in a fluid (water or the like) in the pipeline may be provided in a pipeline such as a pipe of the water supply device.
As a conventional strainer device, there is one in which a cup-shaped strainer main body is built in a ball valve body accommodated in a valve chamber of a pipeline (for example, Patent Document 1). In the strainer device of Patent Literature 1, when the ball valve body is turned to open, the foreign matter contained in the fluid passing through the through-hole of the ball valve body is captured by the strainer body.

JP 2000-46211 A

  In the strainer device of Patent Document 1, when cleaning the strainer body during maintenance, the ball valve body is rotated to close the valve, the valve chamber cap is removed, the strainer body is removed from the ball valve body, and the valve body is removed. Need to be taken out of the room. Here, while rotating the ball valve body, the strainer body built in the ball valve body also rotates, but at that time, foreign matter from the upstream side passes through the gap between the pipe line and the strainer body, There was a risk of passing downstream from the strainer body. Moreover, in this strainer apparatus, the work for removing the strainer body is complicated, and the maintainability is not good.

  The present invention has been made to solve the above-described problem, and provides a strainer device that simplifies the operation when removing the strainer body and can suppress the passage of foreign matter downstream. With the goal.

  In order to achieve the above object, the gist of the present invention is as follows.

The strainer device of the present invention comprises:
A cup-shaped strainer body having an opening at one end and a bottom at the other end;
A strainer casing having a straight pipe line and having an entrance / exit window for taking in and out the strainer body in a part in a circumferential direction of a peripheral wall defining the pipe line;
A strainer cap capable of closing the access window;
A strainer device comprising:
A portion of the strainer body in the circumferential direction and the strainer cap can be fixed to each other,
The strainer body has a posture in which a central axis of the strainer body is parallel to a pipeline axis of the pipeline in a state where a part of the strainer body in the circumferential direction and the strainer cap are fixed to each other. And can be taken in and out through the access window.
According to the strainer device of the present invention, when removing the strainer main body, the work is simplified, and foreign substances can be prevented from passing downstream.

In the strainer device of the present invention,
The strainer body is
An annular flange extending from the opening edge of the opening of the strainer body to the outer periphery;
A piece extending from a portion of the flange portion in the circumferential direction to the opposite side of the bottom portion with respect to the flange portion;
Have
It is preferable that a part of the strainer body in the circumferential direction and the strainer cap can be fixed to each other by fastening the piece of the strainer body to the strainer cap.
According to this configuration, when the strainer body is fixed to the strainer cap, the fixing operation is simplified, and the strainer body can be fixed after finely adjusting the relative position with respect to the strainer cap.

In the strainer device of the present invention,
The strainer casing is adjacent to the upstream side of the flange portion of the strainer body in a state where the strainer body is accommodated in the pipe line and the strainer cap blocks the entrance / exit window. It is preferable to have an annular receiving portion configured to face the flange portion over the entire circumference.
According to this configuration, it is possible to prevent water from the upstream side from flowing downstream without passing through the strainer body.

In the strainer device of the present invention,
The strainer casing has a base that extends from the portion on the entrance / exit window side in the receiving portion toward the upstream side and faces the entrance / exit window,
The strainer cap is provided with a pin protruding from the surface of the strainer cap on the entrance / exit window side,
The base has a pin insertion hole into which the tip of the pin is inserted,
It is preferable that a part of the strainer body in the circumferential direction and the strainer cap can be fixed to each other in a state in which the upstream end face of the piece of the strainer body is in contact with the pin.
According to this configuration, it is possible to more reliably prevent water from the upstream side from flowing downstream without passing through the strainer body.

  ADVANTAGE OF THE INVENTION According to this invention, when removing a strainer main body, while a work becomes easy, the strainer apparatus which can suppress that a foreign material passes downstream is provided.

It is a perspective view which shows an example of the water supply apparatus provided with the strainer apparatus which concerns on one Embodiment of this invention. It is a horizontal sectional view which shows the water supply apparatus of FIG. 1 with the cross section which follows the AA line of FIG. It is a top view which shows the strainer apparatus of FIG. 1 in the state by which the strainer main body was accommodated in the pipe line. It is a longitudinal cross-sectional view which shows the strainer apparatus of FIG. 3 by the cross section which follows the BB line of FIG. FIG. 4 is an exploded vertical sectional view showing the strainer device of FIG. 3 in a partially exploded state. FIG. 4 is an exploded perspective view showing the strainer device of FIG. 3 in a partially exploded state. FIG. 4 is a partially sectional exploded perspective view showing the strainer device of FIG. 3 together with a section taken along line BB in FIG. 3 in a partially exploded state.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  A strainer device according to an embodiment of the present invention is provided in a pipe line such as a pipe of a water supply device and captures foreign matters contained in a fluid (water or the like) in the pipe line. FIG.1 and FIG.2 has shown an example of the water supply apparatus 1 provided with the strainer apparatus 10 which concerns on one Embodiment of this invention. The water supply device 1 of this example is a directly connected water supply type water supply device that is used to supply sufficient water to water demand destinations such as high-rise apartments, and the suction port 11a has a connection port and a pipe to the water supply water pipe. The discharge port 11b is connected to a connection port to a customer or the like via a pipe. Moreover, the water supply apparatus 1 of this example is comprised as a cabinet-type water supply apparatus with which piping 12 from the suction inlet 11a to the discharge outlet 11b was accommodated in the vertically long and thin cabinet 2. FIG. In FIG. 1, for convenience, only the frame member of the cabinet 2 is shown, and the outer plate and the door of the cabinet 2 are not shown.

1 and 2, pressure transmitters 13 and 23, three-way valves 14 and 16, backflow preventers 15 and 18, and strainer devices 10 and 10 ′ of the present embodiment are disposed in the flow path of the pipe 12. One or a plurality (three in this example) of pumps 20a to 20c, valve units 21a to 21c and pressure tanks 22 provided individually for each of the pumps 20a to 20c are provided. In this example, the strainer device 10 of the present embodiment is disposed in the flow path between the pair of three-way valves 14 and 16, and specifically, the three-way valve 14 and the strainer device in order from upstream to downstream. 10, the backflow preventer 15 and the three-way valve 16 are disposed in the flow path. The pumps 20 a to 20 c and the pressure tank 22 are disposed on the downstream side of the three-way valve 16. On the other hand, the other strainer device 10 ′ of the present embodiment is connected in parallel to the one strainer device 10 in a flow path between the pair of three-way valves 14, 16. The three-way valve 14, the strainer device 10 ′, the backflow preventer 18, and the three-way valve 16 are arranged in order from the downstream to the downstream.
The strainer devices 10 and 10 'have the same structure except that the shape of the upper surface is slightly different. In the following description, only the strainer device 10 will be described for convenience.
A control panel 24 for controlling the pumps 20a to 20c and the like is provided on the upper portion of the water supply apparatus 1. A drain pan 25 that receives water that may fall from the pipe 12 during maintenance or the like is provided at the lower portion of the water supply apparatus 1.
In the example of the figure, the strainer device 10 plays a role of capturing foreign matter in the pipe 12 and suppressing the foreign matter from flowing to the backflow preventer 15 and the pumps 20a to 20c disposed on the downstream side of the strainer device 10. Have.
In addition, the strainer apparatus 10 of this embodiment can be suitably arrange | positioned also to piping of the water supply apparatus 1 of a structure different from the water supply apparatus 1 of this example. For example, in the water supply apparatus 1, the components connected to the pipe 12 and the arrangement thereof are not limited to those in the examples of FIGS. 1 and 2, and may be arbitrary. For example, the pumps 20 a to 20 c and the pressure tank 22 may be arranged upstream of the flow path between the pair of three-way valves 14 and 16. In that case, for example, in the example of FIG. 1 and FIG. 2, the suction port 11a and the discharge port 11b are used as the discharge port and the suction port, respectively, and the arrangement of the strainer device 10 and the backflow preventer 15 is reversed (that is, the strainer device). 10 is arranged upstream of the backflow preventer 15), and the arrangement of the strainer device 10 ′ and the backflow preventer 18 is reversed (that is, the strainer device 10 ′ is arranged upstream of the backflow preventer 18). Good.
In addition, the strainer device 10 of the present embodiment can be suitably disposed not only in the directly connected water supply type cabinet type water supply device 1 as in this example, but also in a directly connected water supply type stationary water supply device. Arrangement is possible.

3-7 has shown the strainer apparatus 10 of this embodiment. The strainer device 10 includes a strainer main body 110, a strainer casing 120, and a strainer cap 130. The strainer body 110 is configured in a cup shape having an opening 115 at one end and a bottom 116 at the other end. The strainer casing 120 is configured to be able to accommodate the strainer main body 110, and has a straight pipe line inside, and has an entrance / exit window 121 for taking the strainer main body 110 between the pipe line and the outside. The strainer cap 130 is configured to be able to close the access window 121 of the strainer casing 120.
In this example, the pipeline axis (the central axis of the pipeline) O1 of the pipeline from the inlet 125a to the outlet 125b of the strainer casing 120 is horizontal and linear. And the strainer casing 120 has the entrance / exit window 121 in the circumferential direction part (the upper end part of a surrounding wall in this example) of the surrounding wall which divides a pipe line.
FIG. 3 is a top view of the strainer device 10, and components below the strainer cap 130 are indicated by broken lines. FIG. 4 shows the strainer device 10 in a longitudinal section along the line BB in FIG. 5 and 6 show a state in which the strainer cap 130 and the strainer main body 110 integrated with each other are disassembled from the strainer casing 120. FIG. FIG. 7 shows a state in which the strainer cap 130 and the strainer body 110 are further disassembled from the states of FIGS. 5 and 6.

  In this example, the pipe line defined by the strainer casing 120 extends horizontally, and the entrance / exit window 121 is arranged at the upper end of the strainer casing 120. It can suppress that the water in a pipe line leaks from the entrance / exit window 121 outside. This configuration is particularly advantageous when the strainer device 10 is mounted on a cabinet-type water supply device such as the water supply device 1 of FIG.

  As shown in FIGS. 3 and 6, in this example, the entrance / exit window 121 is circular in plan view. On the other hand, the strainer cap 130 is formed in a flat plate shape and has a rectangular shape larger than the entrance / exit window 121 in a plan view. Fastening holes 134 into which fasteners 170 such as bolts are inserted from the upper side of the strainer cap 130 at the corners at the four corners of the strainer cap 130 and at the four corners around the entrance / exit window 121 at the upper end of the strainer casing 120. 127 are provided respectively. With the strainer cap 130 closing the entrance / exit window 121 from above, the fastener 170 is inserted into the fastening hole 134 of the strainer cap 130 and the fastening hole 127 of the strainer casing 120 from above and tightened, whereby the strainer cap 130 is tightened. It can be fastened to the upper end of the casing 120. In a state where the strainer cap 130 blocks the entrance / exit window 121, the strainer cap 130 becomes horizontal.

  As shown in FIGS. 4 to 7, in this example, the upper end portion of the strainer casing 120 is provided with an annular groove 128 that extends annularly around the entrance / exit window 121 and is open on the upper side. An annular sealing member 140 such as an O-ring is provided in the annular groove 128. In FIG. 7, illustration of the sealing member 140 is omitted. In a state where the strainer cap 130 blocks the entrance / exit window 121, the sealing member 140 is sandwiched between the upper surface of the strainer casing 120 and the lower surface of the strainer cap 130 to be in a compressed state, thereby preventing water in the pipe from leaking to the outside. Is done.

  The strainer body 110 is made of, for example, metal, and extends from the opening edge of the opening 115 to the outer peripheral side, and a mesh part 111 made of a cup-shaped member having an opening 115 at one end and a bottom 116 at the other end. An annular flange portion 112 and a piece portion 113 that extends from a part in the circumferential direction of the flange portion 112 (the upper end portion in this example) to the opposite side of the bottom portion 116 with respect to the flange portion 112.

As shown in FIG. 4, in this example, when the strainer body 110 is accommodated in the strainer casing 120, the central axis O2 of the strainer body 110 is parallel to the pipeline axis O1 of the strainer casing 120, and , On the pipeline axis O1 of the strainer casing 120 (ie, they match). The center axis O2 of the strainer body 110 is assumed to be a cup-shaped center axis formed by the net 111. In this state, the opening 115 of the strainer main body 110 faces the upstream side. Thereby, the strainer body 110 captures foreign matter contained in the water flowing from the upstream side in the net 111 in the same direction as the flow direction of the water, and suppresses the foreign matter from flowing downstream.
In this example, the flange portion 112 extends from the opening edge of the opening 115 to the outer peripheral side in a direction perpendicular to the central axis O <b> 2 of the strainer body 110. Further, the piece portion 113 extends from the upper end portion of the flange portion 112 in a direction parallel to the central axis O2 of the strainer body 110 from the flange portion 112 toward the side opposite to the bottom portion 116 (and upstream side). ing.

The piece 113 and the strainer cap 130 of the strainer body 110 are provided with fastening holes 114 and 132 into which a fastener 150 such as a screw or a bolt is inserted from below the piece 113, respectively. The fastening hole 114 of the piece 113 penetrates the piece 113 in the vertical direction. The fastening hole 132 of the strainer cap 130 opens on the lower surface of the strainer cap 130, but does not open on the upper surface of the strainer cap 130 and terminates before reaching the upper surface. In the illustrated example, the upper surface of the strainer cap 130 is a portion corresponding to the fastening hole 132 and a pin holding hole 131 described later, and is raised more than the other portions.
Then, with the upper surface of the piece portion 113 being in contact with the lower surface of the strainer cap 130, the fastener 150 is inserted into the fastening hole 114 of the piece portion 113 and the fastening hole 132 of the strainer cap 130 from below and tightened. The piece 113 can be fastened to the strainer cap 130. With such a configuration, the piece portion 113 and the strainer cap 130 forming a part in the circumferential direction of the strainer body 110 (the upper end portion in this example) and the strainer cap 130 can be fixed to each other.
As shown in FIG. 3, in this example, when viewed from the entrance / exit window 121 side (upper side), the piece portion 113 is attached to the strainer cap 130 by the fastener 150 at two locations on both sides of the pipeline axis O1 therebetween. It is comprised so that it may be fastened.

  As shown in FIG. 3, when the strainer body 110 is accommodated in the pipeline, when viewed from the entrance / exit window 121 side (upper side), the entrance / exit window 121 is configured to have a size larger than that of the strainer body 110. Yes. 4 to 6, the strainer main body 110 has the central portion O2 of the strainer main body 110 connected to the pipe line in a state in which the piece 113 is fixed (integrated) with the strainer cap 130. It can be accommodated in the pipeline in a posture parallel to the road axis O1, and can be taken in and out through the access window 121 by moving the strainer body 110 up and down in the same posture. In this way, the strainer body 110 is not required to change its posture between when it is housed in the pipeline and the water supply device 1 is operating and when it is taken in and out via the access window 121. Yes.

As shown in FIGS. 4 and 7, the strainer casing 120 is located upstream of the flange portion 112 of the strainer body 110 in a state where the strainer body 110 is accommodated in the pipe and the strainer cap 130 blocks the entrance / exit window 121. Adjacent to the side is an annular receiving portion 122 configured to face the flange portion 112 over the entire circumference. The inner peripheral surface of the receiving portion 122 defines a part of the pipe. Thereby, since most of the water that has flowed from the upstream side flows into the strainer body 110, it is possible to suppress the water from the upstream side from flowing to the downstream side without passing through the strainer body 110.
Note that the gap g between the receiving portion 122 and the flange portion 112 is preferably, for example, 0.5 mm or less.

  As shown in FIGS. 4 and 7, the strainer casing 120 extends from the portion of the receiving portion 122 on the entrance / exit window 121 side (in this example, the upper end portion of the receiving portion 122) toward the upstream side, and the entrance / exit window 121. It has the base part 123 which faces. In this example, the upper surface of the pedestal 123 forms a substantially horizontal flat surface, and the lower surface of the pedestal 123 defines a part of the pipeline.

In this example, the strainer cap 130 is provided with a pin 160 that protrudes from the surface of the strainer cap 130 on the entrance / exit window 121 side (in this example, the lower surface of the strainer cap 130).
More specifically, as shown in FIGS. 4, 5, and 7, the strainer cap 130 has a pin holding hole 131 into which the upper end portion of the pin 160 is inserted from below and held there. . The pin holding hole 131 opens on the lower surface of the strainer cap 130, does not open on the upper surface of the strainer cap 130, and terminates before reaching the upper surface. On the other hand, the base 123 has a pin insertion hole 124 into which the lower end of the pin 160 is inserted from above. The pin insertion hole 124 penetrates the base portion 123 in the vertical direction.
As shown in FIG. 3, in this example, when viewed from the entrance / exit window 121 side (upper side), a pair of pins 160 are inserted into the pin insertion holes 124 at two locations on both sides of the pipeline axis O1. It is configured to be.
In this example, the pin 160 is formed of a spring pin that can be expanded and contracted. The pin holding hole 131 of the strainer cap 130 has a diameter slightly smaller than the outer diameter of the pin 160 in the natural state. Thereby, once the upper end portion of the pin 160 is inserted into the pin holding hole 131, the pin 160 tries to expand in the pin holding hole 131 and is held there. Thereby, the pin 160 which protrudes from the surface (lower surface) by the side of the entrance / exit window 121 of the strainer cap 130 can be provided in the strainer cap 130. FIG. On the other hand, the pin insertion hole 124 of the base 123 has a slightly larger diameter than the pin holding hole 131. Accordingly, when the upper end portion of the pin 160 is held in the pin holding hole 131 and the lower end portion (tip portion) of the pin 160 is once inserted into the pin insertion hole 124, the strainer cap 130 is pulled upward. As shown in FIG. 5, the lower end portion (tip portion) of the pin 160 is pulled out from the pin insertion hole 124 while the upper end portion of the pin 160 is held in the pin holding hole 131.
The strainer cap 130 and the pin 160 may be fixed to each other by bonding, or may be integrally formed by integral molding. Moreover, the pin 160 may be comprised from pins other than a spring pin.

  As shown in FIG. 4, in a state where the strainer main body 110 is accommodated in the pipeline and the strainer cap 130 blocks the entrance / exit window 121, the pin 160 is connected to the upstream end surface 113 a of the piece 113 of the strainer main body 110. Further, the upper end portion and the lower end portion of the pin 160 are inserted into the pin holding hole 131 and the pin insertion hole 124, respectively. In this state, the pin 160 positions the strainer body 110 with respect to the strainer casing 120 in the direction along the pipeline axis O1, and the gap g (FIG. 4) between the receiving portion 122 and the flange portion 112 is a predetermined value or less (for example, 0.5mm or less).

  As shown in FIGS. 3 and 4, an arrow display 133 indicating the direction of the flow of water in the pipe is formed by a depression on the upper surface of the strainer cap 130. The arrow display 133 indicates the side opposite to the fastening hole 132 for the fastener 150 and the pin holding hole 131 for the pin 160 on the projection surface onto the horizontal plane. Thus, when the operator attaches the strainer cap 130 to the strainer casing 120, the operator orients the strainer cap 130 so that the direction of the arrow display 133 matches the direction of the water flow in the pipe line. The opening 115 of the strainer body 110 integrated with the strainer cap 130 under the 130 can be directed upstream.

As shown in FIGS. 4 and 7, in this example, the strainer casing 120 is a portion of the pipeline wall surface that faces the entrance / exit window 121 (in this example, the portion below the entrance / exit window 121 of the pipeline wall surface). A protrusion 126 protruding from the portion) toward the pipe axis O1. The protruding portion 126 is a portion of the flange portion 112 of the strainer main body 110 that is opposite to the entrance / exit window 121 in the state where the strainer main body 110 is accommodated in the pipe line (in this example, the lower end portion of the flange portion 112). On the other hand, it is arranged so as to be adjacent to the downstream side.
If there is no protrusion 126, the strainer body 110 is fixed only at the upper part of the flange portion 112. For example, when water pressure is applied with a large amount of foreign matter clogging the eyes of the strainer body 110, the flange There is a possibility that the lower part of the portion 112 is pushed downstream and deforms. Due to the presence of the protrusion 126, the lower portion of the flange portion 112 can be effectively prevented from being deformed downstream.

Here, in the strainer apparatus 10 as described above, an example of an operation of assembling the strainer body 110 to the strainer cap 130, which is performed before the strainer body 110 is accommodated in the pipeline, will be described.
First, the upper ends of the pair of pins 160 are inserted into the pin holding holes 131 of the strainer cap 130 and held there.
Next, the upper surface of the piece 113 of the strainer body 110 is brought into contact with the lower surface of the strainer cap 130, and the upstream end face 113 a of the piece 113 is brought into contact with the pin 160. Accordingly, the strainer body 110 is positioned with respect to the strainer cap 130 in a direction along the central axis O2 of the strainer body 110.
Next, in this state, the pair 113 and the strainer cap 130 are fastened from the lower side by the pair of fasteners 150. At this time, it is preferable to apply a screw loosening prevention adhesive to the fastener 150 in advance.
As described above, the operation of assembling the strainer body 110 to the strainer cap 130 is completed, and the strainer body 110 and the strainer cap 130 are integrated.

  Thus, in this example, by fastening the piece 113 of the strainer main body 110 to the strainer cap 130 from the lower side by the fastener 150, a part in the circumferential direction of the strainer main body 110 (the upper end in this example) and the strainer cap. 130 can be fixed to each other. Thereby, when the strainer body 110 is fixed to the strainer cap 130, the fixing work is simplified. Accordingly, the strainer body 110 can be fixed to the strainer cap 130 after the relative position of the strainer body 110 with respect to the strainer cap 130 is finely adjusted by the pin 160.

Next, an example of an operation of accommodating the strainer body 110 in the pipe line in a state where the strainer body 110 and the strainer cap 130 are integrated will be described.
First, the strainer cap 130 integrated with the strainer body 110 is held by hand, and the strainer body 110 is oriented so that the central axis O2 is parallel to the pipeline axis O1 and the opening 115 faces the upstream side.
Next, while maintaining the posture, the strainer cap 130 is moved downward toward the entrance / exit window 121 so that the strainer body 110 is accommodated in the pipe line of the strainer casing 120, and the strainer cap 130 is attached to the strainer casing 120. The doorway 121 is closed against the upper end. At this time, the lower end portion (tip portion) of each pin 160 is inserted into the pin insertion hole 124 of the base portion 123. At this time, the posture of the strainer body 110 is not changed, and is maintained in a posture in which the central axis O2 is parallel to the pipeline axis O1 and the opening 115 faces the upstream side. Further, the receiving portion 122 is adjacent to the upstream side of the flange portion 112 of the strainer body 110 and faces the flange portion 112 of the strainer body 110 over the entire circumference. Further, the strainer body 110 is positioned with respect to the strainer casing 120 by the positioning action of the pin 160 so that the gap g between the receiving portion 122 and the flange portion 112 is a predetermined value or less (for example, 0.5 mm or less).
Next, the strainer casing 120 and the strainer cap 130 are fastened from above by the fastener 170.
Thus, the operation of housing the strainer main body 110 in the pipeline is completed.
Thereafter, the operation of the water supply apparatus 1 is started.

The strainer device 10 may not include the pin 160. However, if the strainer body 110 is positioned with respect to the strainer casing 120 by using only the fastener 170 without using the pin 160, the receiving portion may be caused by, for example, the shape error of the strainer casing 120 and the strainer cap 130 made of casting. There is a possibility that the gap g between 122 and the flange portion 112 may increase to about 2 to 3 mm. By positioning the strainer body 110 with respect to the strainer casing 120 using the pins 160 as described above, the receiving portion 122, the flange portion 112, and the flange portion 112 can be reliably secured even if there is a shape error in the strainer casing 120 and the strainer cap 130. Can be set to a predetermined value or less (for example, 0.5 mm or less). Thereby, it can suppress more reliably that the water from an upstream flows into a downstream, without passing through the strainer main body 110. FIG.
Further, the pin 160 is provided at a position different from the present example, and the strainer body 110 is placed on the strainer casing so that the gap g between the receiving portion 122 and the flange portion 112 is a predetermined value or less (for example, 0.5 mm or less). It may be configured to be positioned relative to 120. Alternatively, the strainer body 110 is positioned with respect to the strainer casing 120 so that the gap g between the receiving portion 122 and the flange portion 112 is equal to or less than a predetermined value (for example, 0.5 mm or less) even with a structure other than the pin 160. You may do it.

Next, an example of an operation for removing the strainer body 110 from the strainer casing 120 when cleaning foreign matter trapped inside the strainer body 110 during maintenance of the water supply apparatus 1 will be described.
First, the three-way valves 14 and 16 on the upstream side and the downstream side of the strainer device 10 are operated to stop the flow path between the three-way valves 14 and 16.
Next, the air vent plug of the backflow preventer 15 on the downstream side of the strainer device 10 and the upstream side of the three-way valve 16 is loosened, and the pressure in the flow path between the three-way valves 14 and 16 is released.
Next, the fastener 170 which has fixed the strainer cap 130 and the strainer casing 120 is removed.
Next, as shown in FIGS. 5 and 6, the strainer cap 130 is held by hand and pulled up to be removed from the strainer casing 120. At this time, the entrance / exit window 121 is opened, and the strainer body 110 fixed to the lower side of the strainer cap 130 has a posture in which the central axis O2 is parallel to the pipeline axis O1 and the opening 115 faces the upstream side. While being kept, they are pulled up together and taken out through the access window 121. The pin 160 is pulled out of the pin insertion hole 124 at the lower end (tip) while the upper end of the pin 160 is held in the pin holding hole 131.
Thus, the operation of removing the strainer body 110 from the strainer casing 120 is completed.
Thereafter, the strainer body 110 is cleaned by removing foreign matter accumulated inside. At that time, for example, the strainer main body 110 is cleaned while being integrated with the strainer cap 130, and after the cleaning is completed, the strainer main body 110 and the strainer cap 130 are returned to the strainer casing 120 as described above. Thus, the cleaning work can be easily performed.

As described above, in the strainer device 10 of the present embodiment, the strainer main body 110 is fixed in a state in which the piece portion 113 that forms a part in the circumferential direction of the strainer main body 110 (the upper end portion in this example) and the strainer cap 130 are fixed to each other. The strainer main body 110 can be accommodated in the pipeline and can be taken in and out through the access window 121 in a posture in which the central axis O2 is parallel to the pipeline axis O1 of the pipeline. In this way, the strainer body 110 is not required to change its posture between when it is housed in the pipeline and the water supply device 1 is operating and when it is taken in and out via the access window 121. Yes. Thus, when the operator removes the strainer main body 110 from the strainer casing 120, the operator holds the strainer cap 130 integrated with the strainer main body 110 with his hand and moves it away from the access window 121 (this example). In this case, the strainer body 110 can be removed through the access window 121 without changing the posture of the strainer body 110 from the time of accommodation.
Therefore, when removing the strainer body 110, it is not necessary to remove the strainer cap 130 and the strainer body 110 in two stages, and it is not necessary to change the posture of the strainer body 110. Work becomes easy and maintenance can be improved.
Further, when removing the strainer body 110, there is no need to change the posture of the strainer body 110. For example, as in Patent Document 1, foreign matter captured inside the strainer body 110 leaks from the strainer body while the posture of the strainer body is changed. As a result, it is possible to prevent the foreign matter from falling into the pipeline. Therefore, it can suppress effectively that a foreign material passes downstream. Further, when the strainer body 110 is removed, the strainer body 110 may be pulled upward without changing the posture of the strainer body 110. Even if a small amount of foreign matter falls into the pipeline at that time, the foreign matter is It will fall to the upstream side of the main body 110. For this reason, if the operation is resumed, the foreign matter falling to the upstream side is again captured by the strainer main body 110, so that the passage of the foreign matter to the downstream side is prevented.
Further, since the strainer body 110 is not built in the ball valve body as in Patent Document 1, the pressure loss can be reduced by the amount that the flow path is not narrowed by the through passage of the ball valve body. In particular, as shown in FIG. 4, in this example, the flow path of the portion that accommodates the strainer body 110 is expanded (expanded) compared to the upstream and downstream flow paths. Can be effectively reduced.
In addition, the strainer body 110 is accommodated in a straight pipe line in a posture parallel to the pipe axis, and foreign substances contained in water flowing from the upstream side are captured in the same direction as the water flow direction. For example, when the strainer body 110 is accommodated in a bent or curved pipe line adjacent to the bent or bent portion of the pipe line, and / or the strainer body 110 is accommodated in a direction crossing the pipe axis. Pressure loss can be reduced compared to

  The strainer device of the present invention can be suitably arranged in the piping of the water supply device.

DESCRIPTION OF SYMBOLS 1 Water supply apparatus 2 Cabinet 10, 10 'Strainer apparatus 11a Suction port 11b Discharge port 12 Piping 13, 23 Pressure transmitter 14, 16 Three-way valve 15, 18 Backflow preventer 20a-20c Pump 21a-21c Valve unit 22 Pressure tank 24 Control Panel 25 Drain pan 110 Strainer body 111 Net portion 112 Flange portion 113 Piece portion 113a End face 114 on the upstream side of the piece portion Fastening hole 115 Opening 116 Bottom portion 120 Strainer casing 121 Entrance / exit window 122 Receiving portion 123 Base portion 124 Pin insertion hole 125a Inlet 125b Outlet 126 Projection 127 Fastening hole 128 Annular groove 130 Strainer cap 131 Pin holding hole 132 Fastening hole 133 Arrow indication 134 Fastening hole 140 Sealing member 150 Fastening tool 160 Pin 170 Fastening g Gap O1 Pipeline axis O2 Strainer body The central axis line

Claims (4)

A cup-shaped strainer body having an opening at one end and a bottom at the other end;
A strainer casing having a straight pipe line and having an entrance / exit window for taking in and out the strainer body in a part in a circumferential direction of a peripheral wall defining the pipe line;
A strainer cap capable of closing the access window;
A strainer device comprising:
A portion of the strainer body in the circumferential direction and the strainer cap can be fixed to each other,
The strainer body has a posture in which a central axis of the strainer body is parallel to a pipeline axis of the pipeline in a state where a part of the strainer body in the circumferential direction and the strainer cap are fixed to each other. And a strainer device that can be accommodated in and out through the access window. The strainer body is
An annular flange extending from the opening edge of the opening of the strainer body to the outer periphery;
A piece extending from a portion of the flange portion in the circumferential direction to the opposite side of the bottom portion with respect to the flange portion;
Have
The strainer device according to claim 1, wherein a part of the strainer body in the circumferential direction and the strainer cap can be fixed to each other by fastening the piece of the strainer body to the strainer cap.   The strainer casing is adjacent to the upstream side of the flange portion of the strainer body in a state where the strainer body is accommodated in the pipe line and the strainer cap blocks the entrance / exit window. The strainer device according to claim 2, comprising an annular receiving portion configured to face the flange portion over the entire circumference. The strainer casing has a base that extends from the portion on the entrance / exit window side in the receiving portion toward the upstream side and faces the entrance / exit window,
The strainer cap is provided with a pin protruding from the surface of the strainer cap on the entrance / exit window side,
The base has a pin insertion hole into which the tip of the pin is inserted,
4. The strainer device according to claim 3, wherein a portion of the strainer body in the circumferential direction and the strainer cap can be fixed to each other in a state where an upstream end surface of the piece of the strainer body is in contact with the pin.