JP4603083B2 - Check valve unit for fire fighting equipment and water pipe device for fire fighting equipment using the same - Google Patents

Description

  The present invention, for example, in a building such as a high-rise building, is interposed in the middle of a water pipe path connecting a water outlet installed on the ground close to the building and a fire hydrant installed in the building. In addition, the present invention relates to a water supply pipe device for a fire extinguishing facility for water supply of fire extinguishing water from a water outlet to a fire hydrant, prevention of backflow, drainage, etc. It is about.

  Conventionally, this type of water pipe device for fire extinguishing equipment is connected by connecting a plurality of short pipes equipped with check valves, stop valves, and drain valves because of the need for functions such as backflow prevention, stop water, and drainage. The water pipe device is configured in a concrete pit in the ground near the building in the middle of a pipe path connecting the water inlet and the water pipe on the building side.

  For the construction of this water pipe device, a check valve short pipe, a drain valve short pipe, and a water stop valve single pipe each containing a check valve, a drain valve and a water stop valve in advance in a short water pipe are prepared. The thing which comprises a connection water pipe apparatus by connecting a pipe | tube in the said concrete cage | basket using a flange is proposed (patent document 1).

  Further, there has been proposed a structure in which a check valve and a stop valve are formed in a single pipe, and a plurality of single pipes are connected by a joint with a drain valve in a storage case to constitute a connected water pipe device ( Patent Document 2).

Japanese Patent Laid-Open No. 10-25775 JP-A-11-226146

  By the way, as for the apparatus of patent document 1, the check valve single pipe has only the function of the check valve, and it is necessary to connect two single pipes dedicated to the drainage valve on both sides of the check valve. Furthermore, since it is necessary to connect a water stop valve single pipe to one drain valve single pipe, the number of connecting parts increases, the overall structure of the water supply pipe increases, and many single pipes must be connected by flanges. Therefore, there is a problem that much work is required for the construction work.

  Since the device described in Patent Document 2 is a piston type using a valve body in which the check valve slides in parallel with the water flow direction, the check valve single pipe itself becomes longer and larger in the left-right direction, and is connected as a whole. There is a problem that the water pipe device itself is increased in size, and there is a drain port in the joint, and a handle for opening and closing the drain port is also provided in the joint itself. There is also a problem with sex.

  The present invention has been made in view of the problems of the above-described conventional apparatus, and can be configured to be small and light, and can also improve workability of construction on site and a check valve unit for a fire extinguishing facility and the same An object is to provide a water pipe device for fire extinguishing equipment.

In order to achieve the above object, the present invention
First, flanges are provided at both end openings of a water pipe consisting of one cylindrical body on the left and right openings, and an annular valve seat is provided on the inner peripheral surface of the water pipe toward the center of the cylinder. A linear central valve seat that bisects the annular valve seat to the left and right along the diameter of the valve seat is provided, thereby forming two semicircular passages in the water supply path of the water pipe, and downstream of the central valve seat a common central axis along the central valve seat provided to each inner linear portion of the pair of semicircular-off valve while rotatably supported to the common central axis, the two semi-circular open-close valve by biasing means always constitute a check valve capable of closing the both semicircular path by close contact with the annular valve seat and the central valve seat, and the primary side between the check valve and upstream of the flange in the water pipe It is penetrated upstream of water outlet on the side surface of the lower half of the cylindrical body of the water path Together, and penetrated the downstream side of the water outlet on the side surface of the lower half of the cylindrical body of the secondary side water supply path between the check valve and the downstream side of the flange in the water pipe, the primary side water supply path And the semicircular on-off valve and the on-off valve of the water stop valve unit in a state in which a drain valve is connected to each of the drain outlets of the secondary water supply path and the water stop valve unit is connected to the downstream flange. A check valve for fire extinguishing equipment, wherein the end of the semicircular on / off valve and the end of the on / off valve of the stop valve unit are close to each other when fully open Consists of units.

  By configuring the reverse valve unit in this way, the size of the reverse valve unit itself can be reduced, and a drain valve can be provided in each of the primary water supply path and the secondary water supply path in the reverse valve unit. The reversely supported valve unit having a drainage function can be configured to be extremely small and light.

  If comprised in this way, the independent reverse valve unit which also has the drainage function of a primary side and a secondary side can be comprised very small and lightweight.

  If comprised in this way, the water supply pipe for fire-extinguishing equipment in the state which connected the water stop valve unit to the reverse branch valve unit is comprised very small by making the space | interval of the said semicircle on-off valve and the said on-off valve into the nearest minimum space | interval. be able to.

Second, the first Symbol A fire extinguishing equipment for water pipe apparatus using a check valve unit for a fire fighting equipment mounting, a recess having a predetermined depth in the ground, water pipe storage case to the inside recess The primary side water pipe and the secondary side water pipe are opposed to the opposing surface of the storage case, the check valve unit is connected to the primary side water pipe, and the downstream side of the check valve unit The secondary side water pipe is connected via a water stop valve unit to a water pipe device for a fire extinguishing facility using the check valve unit.

  If comprised in this way, the water pipe connection apparatus for fire extinguishing facilities with few connection parts of a water pipe and easy construction is realizable.

Third, the first Symbol A fire extinguishing equipment for water pipe apparatus using a check valve unit for a fire fighting equipment mounting, a recess having a predetermined depth in the ground, water pipe storage case to the inside recess The primary side water pipe and the secondary side water pipe are opposed to the opposing surface of the storage case, the check valve unit is connected to the primary side water pipe, and the downstream side of the check valve unit The secondary side water pipe is connected via a stop valve unit and a drum tube, and is constituted by a water pipe device for a fire extinguishing facility using the check valve unit.

  If comprised in this way, the water pipe connection apparatus for fire extinguishing facilities with few connection parts of a water pipe and easy construction is realizable. Further, the vibration of the secondary water pipe is not directly transmitted to the water stop valve unit by the drum tube.

  According to the present invention, the size of the reverse valve unit itself can be reduced, and a drain valve can be provided in each of the primary water supply path and the secondary water supply path in the reverse valve unit, and the reverse valve also has a drain function. The branch valve unit can be configured to be extremely small and light.

  In addition, the gap between the semi-circular on / off valve of the reverse valve unit and the on / off valve of the water stop valve unit connected to the reverse valve unit is minimized so that the water stop valve unit is connected to the reverse valve unit. The water supply pipe for fire extinguishing equipment can be configured extremely small.

  Moreover, by using the check valve unit of the present invention as a water supply pipe for a fire extinguishing facility, it is possible to realize a water supply pipe device for a fire extinguishing facility that has few connection points of the water supply pipe and can be easily constructed.

It is a plane sectional view of the reversely supported valve unit according to the present invention. It is side surface sectional drawing of a check valve unit same as the above. It is a transverse cross section of the secondary side of a check valve unit same as the above. It is a front view of the primary side of a check valve unit same as the above. It is a side view of a check valve unit same as the above. It is a perspective view of a check valve unit same as the above. It is a top view of the water supply pipe apparatus for fire extinguishing facilities using a check valve unit same as the above. It is a front view of a water pipe apparatus same as the above. It is a side view of a water pipe apparatus same as the above. It is a top view of other embodiment of a water pipe apparatus same as the above. It is a side view of other embodiment of a water pipe apparatus same as the above.

  1 and 2 are sectional views of a check valve unit of a water supply pipe for fire extinguishing equipment according to the present invention, FIG. 1 is a plan sectional view, and FIG. 2 is a side sectional view.

  In these drawings, reference numeral 1 denotes a check valve unit. The check valve unit 1 includes a cylindrical main body 1 'having left and right circular openings (both opening parts) 1a and 1a', and left and right circular openings. 1a and 1a ′ are provided with annular flanges 1b and 1b ′ provided integrally with the cylindrical main body 1 ′, and a cylindrical water supply path R is formed therein. The flanges 1b and 1b ′ are JIS standard flanges (12 holes H, see FIG. 3 and the like) used for the water supply pipe, and the existing water supply pipe 18 connected to the check valve unit 1 It is formed in the same dimension as the flanges 18a, 21a such as 21 (see FIG. 9).

  An annular valve seat 2 is formed in a substantially central portion of the inner peripheral surface 1 ″ of the cylindrical main body 1 ′ of the check valve unit 1 so as to protrude from the inner peripheral surface in the direction of the cylindrical central axis M (cylinder central direction). This annular valve seat 2 has an inclined surface 2a in which the surface (the surface on the primary side water supply channel R1 side) directed in the direction of arrow A which is the flowing water direction faces the central portion of the cylindrical main body, A valve seat 2c having a vertical surface is formed from the smallest diameter portion 2b toward the inner peripheral surface 1 ″. In the check valve unit 1, the water supply path upstream of the annular valve seat 2 is referred to as a primary water supply path R1, and the water supply path downstream of the annular valve seat 2 is referred to as a secondary water supply path R2.

  Reference numeral 3 denotes the inside of the cylindrical main body 1 ′ in the vertical direction along the diameter line N (FIG. 4) of the annular portion (or the cylindrical main body 1 ′) constituted by the inclined surface 2a of the annular valve seat 2. An inner central valve seat (central valve) in which inner straight portions 4a ′ and 4b ′ of water stop discs (semicircular on-off valves) 4a and 4b, which will be described later, come into contact with a downstream plane of the column 3 and which are described later. Seat) 3a is formed. The central valve seat 3a is provided so as to bisect the annular valve seat 2 to the left and right along the diameter of the annular valve seat 2. The annular valve seat 2 and the valve seat 3a form two substantially semicircular passages Ra and Rb in the water supply path R (see FIG. 4).

  4 is a so-called wafer type check valve provided so as to be in close contact with the annular valve seat 2 and the central valve seat 3a, and has a function of stopping the primary water supply path R1 and the secondary water supply path R2. And has the following configuration.

  Reference numerals 5 and 5 ′ denote bulging portions provided above and below the central portion of the cylindrical body 1 ′, which support the upper and lower ends of the common central shaft 6 and the interference prevention shaft 7 of the wafer type check valve 4. It is.

  The central shaft 6 rotatably supports the two water stop disks 4a and 4b of the wafer type check valve 4, and is slightly downstream from the valve seat 2c of the annular valve seat 2. The upper and lower ends of the cylindrical body 1 ′ are pivotally fixed to the bulging portions 5 and 5 ′ so as to be parallel to the diameter line N and the inner central valve seat 3a. It is fixed with.

  The interference prevention shaft 7 is slightly downstream from the central axis 6 and is adjacent to the central axis 6 so as to be parallel to the central axis 6, that is, along the diameter line N of the cylindrical body 1 ′. The upper and lower end portions are fixed to the bulging portions 5 and 5 ′ in the same manner as described above, and are thus fixed in an upright state in the vertical direction.

  The water stop discs 4a and 4b are each formed in a semicircular shape, and each of the central inner straight portions 4a ′ and 4b ′ is in close contact with the inner central valve seat 3a, and the semicircular portion (end portion). 4a ″ and 4b ″ are configured so as to be able to stop the primary water supply path R1 and the secondary water supply path R2 by closely contacting the valve seat 2c.

  Support cylinders 8a and 8b are rotatably inserted above and below the central shaft 6, and the one water-stopping disk is attached to support plates 8a 'and 8b' extending in a radial direction from the support cylinders 8a and 8b. A plate surface 4c on the downstream side of 4a is bonded (see FIG. 3), and the water stop disk 4a is pivotally supported around the central axis 6 in the directions of arrows B and C.

  In addition, support cylinders 9a and 9b are rotatably inserted vertically below the center axis 6 adjacent to the support cylinders 8a and 8b. The support cylinders 9a and 9b extend in the radial direction. A plate surface 4d on the downstream side of the water stop disk 4b is bonded to the plates 9a ′ and 9b ′ (see FIG. 3), whereby the water stop disk 4b is moved around the central axis 6 by arrows B ′ and C. 'It is pivotally supported in the direction of rotation.

  Reference numerals 10a and 10b denote springs (biasing means) which are wound around and fixed to the upper and lower portions of the central portion of the central shaft 6, respectively. The upper spring 10a has one end 10a 'at one of the water-stopping disks. 4 a abuts the downstream plate surface 4 c, the water stop disk 4 a is in a water stop position, that is, its inner straight portion 4 a ′ is in close contact with the inner central valve seat 3 a, and the semicircular portion 4 a ″ is the valve seat 2 c It is always urged in the direction of arrow C with a constant urging force at a position in close contact with the.

  The lower spring 10b has one end 10b 'abutting against the downstream plate surface 4d of the other water stop disk 4b, and the water stop disk 4b is positioned at the water stop position, that is, its inner straight portion 4b' The semicircular portion 4b ″ is in close contact with the central valve seat 3a and is always urged in the direction of the arrow C ′ with a constant urging force at a position where the semicircular portion 4b ″ is in close contact with the valve seat 2c.

  Therefore, the water stop disks 4a and 4b are always in the position of the solid line in FIG. 1 by the urging force of the springs 10a and 10b, and the primary semi-water supply passages are closed by closing the two semicircular passages Ra and Rb. It is in the state which has stopped R1 and the secondary side water supply path R2. When a water flow is generated in the direction of the arrow A, the water stop disks 4a and 4b are opened in the directions of the arrows B and B 'against the urging force of the springs 10a and 10b by the pressure of the water flow. A water stream is generated on the secondary side.

  The water stop disks 4a and 4b are opened at the maximum opening to the two-dot chain line position of FIG. 1 by the water flow from the primary side water supply path R1 to the secondary side water supply path R2. At this time, the disks 4a and 4b are opened. When the support plates 8a ′, 8b ′, 9a ′, 9b ′ are in contact with the interference prevention shaft 7, further rotation is prevented.

  Further, when a water flow is generated from the secondary side water supply channel R2 to the primary side water supply channel R1, or when the water flow from the primary side water supply route R1 to the secondary side water supply route R2 is de-energized, the water flow or the spring 10a. , 10b, the water stop disks 4a, 4b are rotated back in the directions of arrows C, C ', and the primary side water supply path R1 and the secondary side water supply path R2 are stopped to stop the wafer type check. It serves as a valve.

  In the state of the maximum opening (the two-dot chain line in FIG. 1), the water stop disks 4a and 4b are adjacent to the butterfly-type water stop valve unit 12 (shown by the two-dot chain line in FIG. 1). ) In the maximum opening degree (when fully opened) of the water stop disk (open / close valve) 13 (the state shown in FIGS. 1 and 2). Specifically, in the fully open state of the water stop disc 13, the tip portions (end portions) 4 ′ and 4 ′ of the semicircular portions 4a ″ and 4b ″ of the water stop discs 4a and 4b when fully opened A minimum interval (minimum adjacent interval) t is generated between the end of the water stop disk 13 in the state, and they are provided so as not to interfere with each other. In addition, the space | interval t can be comprised about 10 mm-20 mm, for example.

  14 is a drain port provided on the side surface of the lower half of the cylindrical body 1 'in the primary water supply path R1 between the check valve 4 and the upstream flange 1b of the cylindrical body 1'; In the secondary-side water supply path R2 between the check valve 4 and the downstream flange 1b ′ of the cylindrical main body 1, drainage ports provided on the side surfaces of the lower half of the cylindrical main body 1 ′, Drain pipes 16, 16 are connected, and drain valves 17 by manual handles 17 a are respectively provided at the ends of the drain pipes 16, 16.

  In FIG. 1, 12 is a water stop valve unit using a so-called butterfly valve, and a general-purpose product can be used. The water stop valve unit 12 is rotated to the horizontal position in the arrow E direction by rotating the water stop disk 13 in the directions of arrows D and E, and the open position where the secondary water supply path R2 communicates with the downstream side. Then, the water stop disk 13 is configured to rotate to a vertical position in the direction of the arrow D so as to be able to take a water stop state of stopping the secondary water supply path R2 and the downstream side.

  The water stop disk 13 is opened and closed by connecting the central axis P of the disk 13 and the rotating shaft 16 ″ of the open / close handle 16 ′ with a shaft 25 via a bevel gear or the like, thereby opening and closing the open / close handle 16 ′. Thus, the water stop disk 13 can be arbitrarily opened and closed.

  The water stop valve unit 12 includes a main body 12a in which the water stop disk 13 is incorporated, a handle mounting portion 12b that protrudes horizontally from the main body 12a, and a handle 16 'that opens and closes the water stop disk 13. .

  18 is a secondary water pipe connected to the water stop valve unit 12 via a flange 18a. The water stop valve unit 12 is connected by connecting the flange 1b 'and the flange 18a with bolts and nuts. Is fixed in a state of being sandwiched between the flange 1b ′ of the check valve unit 1 and the flange 18a of the secondary side water supply pipe 18.

  Since this invention is comprised as mentioned above, when constructing on the spot, the water pipe storage recessed part (concave part) 19, such as a concrete fence, is recessed in the ground (refer FIGS. 7-9). The water pipe storage case 20 having a rectangular parallelepiped shape with an opening on the upper and lower surfaces is fitted and disposed in the water pipe storage recess 19. At this time, the lower surface of the water pipe storage case 20 is open, and since the ground is exposed, gravel 23 and the like are spread, and drainage (fire-extinguishing water) is allowed to naturally permeate into the ground. G is the ground.

  Next, a primary water pipe 21 and a secondary water pipe 18 are penetrating from the ground to the opposite side of the water pipe storage case 20, and the primary side of the check valve unit 1 is connected to the flange 21 a of the primary water pipe 21. The flange 1b is connected, and the flanges 21a and 1b are connected by bolts and nuts S.

  Further, a secondary side water supply pipe 18 is connected to the secondary side of the check valve unit 1 via the water stop valve unit 12, and the secondary side flange 1 b ′ of the check valve unit 1 and the secondary side are connected. The flange 18a of the water supply pipe 18 is coupled by bolts and nuts S with the water stop valve unit 12 sandwiched therebetween. At this time, it is preferable that the drain port of the drain valve 17 of the check valve unit 1 is disposed so as to face the ground side, and the handle 16 'of the stop valve is mounted upward (see FIG. 8).

  Thereafter, the upper opening of the water pipe storage case 20 is closed with the upper lid 22. In the above case, the check valve unit 1 is normally manufactured by a manufacturer, and the water stop valve unit 12 is prepared by an on-site contractor and is constructed as shown in FIGS.

  On the other hand, the manufacturer may deliver the product to a contractor with the check valve unit 1 and the water stop valve unit 12 connected. In this case, as shown in FIGS. 10 and 11, the manufacturer manufactures the check valve unit 1, the water stop valve unit 12, and a single pipe (a drum tube having both end flanges 24 a and 24 b) 24. Delivered to the contractor in a connected state. In this case, the secondary side flange 24b of the drum tube 24 is connected to the flange 18a of the secondary side water supply pipe 18 at the site. In this way, the drum tube 24 is interposed between the water stop valve unit 12 and the secondary side water supply pipe 18 so that the movement, vibration, etc. of the secondary side water supply pipe 18 due to an earthquake or the like are directly transmitted to the water stop valve unit 12. Therefore, it is possible to realize a water supply pipe device for fire extinguishing equipment that is resistant to vibration and the like.

  As described above, according to the present invention, since the reverse valve unit is constituted by a so-called wafer-type reverse valve, the size of the reverse valve unit itself can be reduced, and the primary side water supply path and the secondary in the reverse valve unit can be reduced. Since each drainage port (drainage valve) can be provided in the side water supply path, a reverse valve unit having a drainage function can be configured to be extremely small and light.

  Further, since the drain valve is provided on the primary side and the secondary side of the reverse valve unit, a single reverse valve unit having a drain function can be configured very compactly.

  In addition, since the check valve unit is small and light, the check valve unit can be easily removed during maintenance and can be easily maintained on the ground.

  In addition, the interval between the semi-circular opening / closing valve (water stop disk) of the reverse support valve unit and the open / close valve (water stop disk) of the water stop valve unit connected to the reverse support valve unit is set to a minimum adjacent distance. By comprising, the water supply pipe for fire-extinguishing equipment in a state where the water stop valve unit is connected to the reversely supported valve unit can be made extremely small.

  Moreover, since the check valve unit of the present invention is used as a water supply pipe for a fire extinguishing equipment, the number of connection points of the water pipe is small, and the check valve unit is small and light. Can be realized.

  In particular, in the case of the underground type, since it is an installation operation in a narrow place, it is preferable that each water pipe unit is as small and light as possible and that there are few connection parts. It can implement | achieve by setting it as the small lightweight check valve unit which concerns on this.

  In addition, the water supply pipe device for fire extinguishing equipment can be composed of a check valve unit and a water stop valve unit, and since there are few flange connection points, leakage from the water pipe device itself is reduced as much as possible due to secular change. Can do.

  Moreover, since the length of the whole water pipe can be made short and small, the concrete fence or the storage case can be made small, and the upper lid can also be made small.

  The underground burial of the water supply pipe for a fire extinguishing facility requires a large load such as a truck on the upper lid, and it is necessary to design it under the assumption that a large load is applied. The check valve unit according to the present invention According to this, the water pipe device can be miniaturized as much as possible, and a water pipe device for fire extinguishing equipment that can be easily designed can be realized.

  The check valve unit of the present invention can be widely used as a water pipe device for fire extinguishing equipment of various buildings such as high-rise buildings.

1 Check Valve Units 1a and 1a ′ Circular Openings 1b and 1b ′ on Both Left and Right Flange 1 ”Inner Peripheral Surface 2 Annular Valve Seat 2c Valve Seat 3 Column 3a Inner Central Valve Seat (Central Valve Seat)
4 Check valve 4 'Tip (end)
4a, 4b Water stop disk (semi-circular on-off valve)
4a ', 4b' Inner straight portions 4a ", 4b" Semicircular portions 6 Common central shafts 10a, 10b Spring (biasing means)
12 Water stop valve unit 13 Water stop disk (open / close valve)
14, 15 Drain port 17 Drain valve 18 Secondary side water pipe 19 Water pipe storage recess (recess)
20 Water pipe storage case 21 Primary side water pipe 24 Taiko pipe

Claims (3)

Provide flanges at both ends of the water pipe consisting of one cylindrical body on the left and right sides,
An annular valve seat projects from the inner peripheral surface of the water pipe toward the center of the cylinder, and a linear central valve seat that bisects the annular valve seat left and right along the diameter of the annular valve seat is provided. As a result, two semicircular passages are formed in the water supply path of the water pipe.
A common central axis along the central valve seat provided on the downstream side of the central valve seat, each inner linear portion of the pair of semicircular-off valve while rotatably supported to the common central axis, the biasing means by close contact with the both semicircular-off valve always the annular valve seat and the central valve seat constitutes a check valve capable of closing the both semicircular path,
In addition , an upstream drainage port is provided in the side surface of the lower half of the cylindrical main body of the primary water supply path between the check valve and the upstream flange in the water supply pipe, and the reverse in the water supply pipe A downstream drainage port is provided in the side surface of the lower half of the cylindrical main body of the secondary water supply path between the stop valve and the downstream flange ,
A drain valve is connected to each drain port of the primary side water route and the secondary side water route,
When the stop valve unit is connected to the flange on the downstream side, when the semicircular on-off valve and the stop valve of the stop valve unit are fully opened, the end of the semicircular on-off valve and the stop valve unit A check valve unit for fire extinguishing equipment , characterized in that it is configured so that the distance from the end of the on-off valve is close . A water supply pipe device for fire fighting equipment using the check valve unit for fire fighting equipment according to claim 1,
Forming a concave portion of a predetermined depth on the ground, fitting a water pipe storage case in the concave portion, opposing piping of the primary side water pipe and the secondary side water pipe on the opposing surface of the storage case;
The reverse valve is characterized in that the check valve unit is connected to the primary water pipe, and the secondary water pipe is connected to the downstream side of the check valve unit via the water valve unit. Water pipe equipment for fire extinguishing equipment using a stop valve unit. A water supply pipe device for fire fighting equipment using the check valve unit for fire fighting equipment according to claim 1,
Forming a concave portion of a predetermined depth on the ground, fitting a water pipe storage case in the concave portion, opposing piping of the primary side water pipe and the secondary side water pipe on the opposing surface of the storage case;
The check valve unit is connected to the primary water supply pipe, and the secondary water supply pipe is connected to the downstream side of the check valve unit through a stop valve unit and a drum tube. A water pipe device for fire fighting equipment using the check valve unit.

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