JP2012112505A - Flow control valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flow control valve which can be installed without a large work space.SOLUTION: The flow control valve 10 includes a casing 2 for watertightly covering the outer surface 1a of a fluid tube 1 made of a resin, and a valve body 5 supported by the casing 2 and operating via a hole Q bored in the fluid tube 1 in the casing 2. The valve opens/closes the flow path of the fluid tube 1 installed in a constant flow state. The casing 2 includes an abutment part 12b which abuts on the outer surface 1a of the fluid tube 1 made of a resin, and a heating part 13 which heats the abutment part 12b and the outer surface 1a of the fluid tube 1 to melt them, and is formed to be located in the boring direction of the hole Q in the outer surface 1a of the fluid tube 1.

Description

  The present invention includes a casing that watertightly covers an outer surface of a fluid pipe made of a resin, and a valve body that is supported by the casing and that operates via a perforation formed in the fluid pipe within the casing. The present invention relates to a flow control valve that is installed in a continuous flow state and can open and close a flow path of a fluid pipe.

  In the conventional flow control valve, there is a type in which a resin pipe joint portion extending in a predetermined length in the pipe axis direction is connected to a fluid pipe, heated and melted, and fused to the fluid pipe (for example, , See Patent Document 1).

Japanese Patent Laid-Open No. 10-220612 (2nd page, FIG. 1)

  However, in the control valve described in Patent Document 1, an extension portion of a predetermined length of the fluid pipe is cut out, a control valve is installed in place of the extension portion, and the control valve is installed in the fluid pipe. There is a problem that a large work space is required because it is necessary to connect to the pipe end.

  The present invention has been made paying attention to such problems, and an object thereof is to provide a flow control valve that can be installed without requiring a large work space.

In order to solve the above-mentioned problem,
A casing that water-tightly covers an outer surface of a fluid pipe made of resin, and a valve body that is supported by the casing and that operates through a perforation formed in the fluid pipe within the casing. A flow control valve that is installed in a continuous flow state and can open and close the flow path of the fluid pipe,
The housing is made of resin and includes a contact portion that contacts the outer surface of the fluid pipe, and a heating portion that heat-bonds the corresponding contact portion and the outer surface of the fluid pipe to each other, and It is characterized in that it is formed on the outer surface of the fluid pipe so as to be arranged in the drilling direction.
According to this feature, the space required for drilling the fluid pipe can be used as a space for approaching and arranging the casing with respect to the outer surface of the fluid pipe. In addition to being able to install a control valve in a state where space saving has been achieved without using space, the outer surface of the fluid pipe heated by the heating part and the abutting part are integrated by heat fusion to achieve water tightness. Can be increased.

The control valve of the present invention is
A cover for covering the outer surface of the fluid pipe on the side facing the contact portion is provided on the casing.
According to this feature, since the cover provided on the casing covers the outer surface of the fluid pipe on the side facing the abutting portion, the valve body supported by the casing can be connected to the fluid pipe via the perforation. Even when a reaction force is applied to the casing on the side away from the fluid pipe, the reaction force can be countered by the cover.

The control valve of the present invention is
The cover is made of resin and is provided on the casing by heat fusion.
According to this feature, not only the cover can be integrated with the housing, but also the material of the cover and the housing can be shared.

The control valve of the present invention is
A band that presses the contact portion toward the outer surface of the fluid pipe is wound around the circumferential direction of the fluid pipe.
According to this feature, the abutting portion is pressed against the outer surface of the fluid pipe by the band wound in the circumferential direction of the fluid pipe, so that the abutting portion and the outer surface of the fluid pipe are reliably brought into contact with each other. In addition to ensuring a heat-sealing region, the valve element supported by the casing gives a reaction force to the side away from the fluid pipe when the fluid pipe is closed through the perforation. But the band can counter this reaction force.

The control valve of the present invention is
The housing further includes an extending portion made of metal extending along the operation direction of the valve body.
According to this feature, since the extending portion made of metal is extended along the operation direction of the valve body, the structural strength of the housing is increased, and even if force is applied by the operation of the valve body, the housing is Maintain body shape.

It is a sectional side view which shows the state which has arrange | positioned the branch pipe of the control valve to the fluid pipe | tube in Example 1. FIG. It is a front view of the partial cross section which shows the state which has pierced the fluid pipe | tube. It is a front view of the partial cross section which shows the state which attached the valve body to the operation body. It is a front view of the partial cross section which shows the flow-path open / closed state by a valve body. FIG. 5 is a side sectional view similar to FIG. 4. It is a front view of the partial cross section which shows the flow-path open / closed state by the valve body in Example 2. FIG. FIG. 7 is a side sectional view similar to FIG. 6. It is a sectional side view which shows the flow-path open / closed state by the valve body in Example 3. FIG. It is a sectional side view which shows the flow-path open / closed state by the valve body in Example 4. FIG.

  EMBODIMENT OF THE INVENTION The form for implementing the control valve which concerns on this invention is demonstrated below based on an Example.

  The water control valve 10 according to the first embodiment will be described with reference to FIGS. 1 to 5. Hereinafter, the left side of FIG. 1 and FIG. 5 and the front side of FIG. 2 to 4 will be described as the front side (front side) of the control valve. As shown in FIGS. 4 and 5, the water control valve 10 as the flow control valve of the present invention is mainly drilled in the upper part of the fluid pipe 1 in which clean water flows and extends in a substantially horizontal direction. Case 2 as a housing that is in fluid communication with the perforation Q and covers the outer periphery of the fluid pipe 1 in a watertight manner, and a gate valve that is moved up and down in the case 2 by the rotation of the rotating screw 4, that is, operated in the axial direction of the rotating screw 4 The valve body 5 and the conduit of the fluid pipe 1 are blocked or opened.

  The fluid pipe 1 of the present embodiment is composed of a high-density polyethylene pipe that is a resin pipe formed in a substantially circular shape in cross section. The material of the fluid pipe is not limited to high-density polyethylene, and may be a heat-sealable material made of polyolefin resin or a predetermined resin. Further, in the present embodiment, the fluid in the fluid pipe 1 is clean water, but the fluid flowing in the fluid pipe is not necessarily limited to clean water, and may be industrial water, for example, or a gas or gas-liquid mixture It may be a fluid pipe through which a fluid in a state flows.

  As shown in FIGS. 4 and 5, the case 2 fixedly attached to the outer peripheral surface of the fluid pipe 1 has an abutment portion 12 b that abuts on the outer surface 1 a of the fluid pipe 1 and an upper and lower sides that are substantially orthogonal to the tube axis of the fluid pipe 1. It consists of the branch pipe 12 provided with the inner space part 12c of a direction, and the valve lid 3 connected to the inner space part 12c.

  As shown in FIG. 1, the contact portion 12 b of the branch pipe 12 is made of high-density polyethylene, which is a resin, and further inside the contact portion 12 b in the vicinity of the contact surface 12 d that contacts the outer surface 1 a of the fluid tube 1. In addition, a heating wire 13 as a heating portion that generates heat when current flows continuously extends over substantially the entire contact surface 12d so as to surround a perforation Q formed in the fluid pipe 1 described later. Has been. Each end of the heating wire 13 is connected to connecting portions 15 and 15 provided on the outer surface of the branch pipe 12 so as to be electrically connectable to an external power line. The material of the contact portion is not limited to high-density polyethylene, but may be other heat-bondable material made of polyolefin resin or predetermined resin, but is preferably made of the same material as the fluid pipe.

  Explaining in order of the installation steps of the water control valve 10, as shown in FIG. 1, first, the branch pipe 12 is directed from the upper space where a perforation Q described later in the fluid pipe 1 is drilled to the lower fluid pipe 1. By approaching, the branch pipe 12 is disposed on the fluid pipe 1, that is, the contact portion 12 b is brought into contact with the outer surface 1 a of the fluid pipe 1. Next, power cables C, C connected to an external power source (not shown) are connected to the connecting portions 15, 15, and power is supplied from the external power source for a predetermined time. When the heated heating wire 13 is heated to a high temperature, the contact surface 12d of the contact portion 12b made of resin and the outer surface 1a of the fluid pipe 1 in contact with the contact surface 12d are heated and gradually melted. .

  The melted contact surface 12d of the contact portion 12b and the outer surface 1a of the fluid pipe 1 are mixed together, and as shown by the dotted line encircled portion in FIG. 1, the heat generation by the heating wire 13 is stopped and the temperature is lowered to room temperature. It is transformed into a heat-sealed region W that has been solidified. In this way, the branch pipe 12 is attached to the fluid pipe 1 in a watertight manner. After attaching the branch pipe 12 to the fluid pipe 1, the water tightness between the outer surface of the fluid pipe 1 and the branch pipe 12 may be appropriately confirmed by applying water pressure in the branch pipe 12.

  Next, as shown in FIG. 2, the upper case 35 having the working valve 36 and the punching device 50 disposed therein is connected to the upper flange 12 a of the branch pipe 12 in a watertight manner. The perforating apparatus 50 is connected to a driving means (not shown) and has a shaft member 51 extending in the axial direction in the branch pipe 12 toward the fluid pipe 1 and a sharp member that is fixed to the tip of the shaft member 51 and perforates the fluid pipe 1. A cutter member 52 having a perforating blade 52a, and extending the cutter member 52 in the axial direction to approach the outer surface of the fluid pipe 1 to perforate the outer wall. A perforation Q is drilled in. The shaft member may be configured to extend in the axial direction and rotate around the shaft, and the perforation may be formed in the fluid pipe by rotating the cutter member.

  After drilling the perforation Q by the perforating device 50, the perforating device 50 is pulled up and placed in the upper case 35, and then the work valve 36 is operated to stop the branch pipe 12. Then, the punching device 50 is removed from the upper end portion of the upper case 35, and the outer cover 70 is watertightly connected to the upper end portion of the upper case 35 as shown in FIG. The outer cover 70 is provided with a pair of openings 71, 71 facing sideways, and these openings 71, 71 are watertightly closed by lid bodies 72, 72 and bolts / nuts 73.

  An arm (not shown) is attached to an upper end (not shown) of the outer cover 70 so as to be movable up and down. A valve lid 3 in which a valve body 5 for blocking or opening the conduit of the fluid pipe 1 is previously connected via an intermediate member 75 to the lower end of the arm. The valve lid 3 is disposed in the outer cover 70 when the arm is attached to the upper end portion of the outer cover 70. The arm and the upper end of the outer cover 70 are watertightly held by a rubber body (not shown). Furthermore, the intermediate member 75 is formed in a cylindrical shape, and a rotation operation portion 4a (described later) is inserted and disposed therein (see FIG. 4).

  After the outer cover 70 is connected to the upper end of the upper case 35 in a watertight manner, the branch pipe 12 and the outer cover 70 are connected by a communication member such as a hose or a bypass pipe (not shown) having an on-off valve. Then, an air valve (not shown) provided at the upper end portion of the outer cover 70 is opened, and the working valve 36 is operated to open the branch pipe 12, thereby allowing the fluid pipe 1 to pass through the outer cover 70 and the branch pipe 12. Fill with water that was flowing inside.

  After the inside of the outer cover 70 and the inside of the branch pipe 12 are filled with clean water, the air valve is closed, the on-off valve is opened, and the branch pipe 12 and the outer cover 70 are communicated with each other. The water pressure inside the branch pipe 12 and the water pressure inside the branch pipe 12 are always kept constant, and the valve lid 3 is pressed in a continuous water state by a pressing means (not shown) previously attached to the outer cover 70, The valve lid 3 is assembled in a sealed manner on the flange 12a.

  At this time, the inside of the branch pipe 12 and the inside of the outer cover 70 are filled with the clean water flowing in the fluid pipe 1 and have the same water pressure. Therefore, when the valve lid 3 is assembled to the upper flange 12a, The drag received by the valve lid 3 from the flowing water can be kept small. After the valve lid 3 is assembled to the upper flange 12a, the lid bodies 72, 72 are removed, and the intermediate member 75 is separated from the valve lid 3 through the openings 71, 71.

  As shown in FIGS. 4 and 5, the valve lid 3 has an outer diameter smaller than the inner diameter of the branch pipe 12, and an O-ring 19 provided along the outer periphery of the lower portion of the valve lid 3 It is inserted in a watertight manner along the inner peripheral surface of the branch pipe 12. Further, the position of the valve lid 3 is fixed by screwing a fixing bolt 16 so that the valve lid 3 is fixed. The fixing bolt 16 is screwed into the valve lid 3 to regulate the valve lid 3 in the vertical direction.

  As shown in FIG. 5, the rotation screw 4 is rotatably attached to an insertion hole 32 drilled in the top of the valve lid 3 and has an upper end protruding outside the valve lid 3. The holding plate 33 is fixed to the upper end surface of the valve lid 3 with a bolt 34 and prevents the rotation screw 4 from being pulled out. With the above configuration, the rotating screw 4 is rotatable in both forward and reverse directions with respect to the case 2 but does not move up and down. Reference numeral 4b denotes a screw portion having a circumferential surface screwed over substantially the entire length except for the upper end portion of the rotary screw 4.

  As shown in FIGS. 4 and 5, the screw top 63 is fitted in the guide groove 61 formed in the upper end portion of the valve body 5 and is screwed into the screw portion 4 b, so that the upper end of the rotating screw 4 is By rotating the screw part 4b according to the rotation of the rotation operation part 4a formed in the part, the valve body 5 can move up and down following the screw top 63 screwed along the screw part 4b.

  As shown in FIG. 5, the valve body 5 is formed with an insertion hole 64 into which the screw portion 4 b of the rotary screw 4 is inserted. Further, overhanging portions 62 and 62 extending in the vertical direction on the upper and downstream outer surfaces of the valve body 5 are slidable along the groove portion 3 a provided on the inner surface of the valve lid 3 or the branch pipe 12 in the vertical direction. It is extended to. The overhanging portions 62 and 62 configured in this manner come into contact with the groove portion 3 a so that the rotation of the valve body 5 accompanying the rotation of the rotating screw 4 can be restricted.

  In this way, the valve lid 3 to which the valve body 5 is attached is pressed against the branch pipe 12 in an indefinite water state by the pressing means previously attached to the outer cover after the work valve 36 is opened. The valve lid 3 is assembled in a sealed manner to the upper flange 12 a of the branch pipe 12 while suppressing the drag received by the valve lid 3 from the water flowing in the pipe 1, and the fixing bolt 16 is screwed into the valve lid 3. Further, the open / close valve of the communication member is closed, and the upper case 35 and the outer cover 70 are removed from the upper flange 12a. Finally, the ring-shaped flange 9 is inserted into the valve lid 3, and the flange 9 and the branch pipe 12 are fastened with bolts and nuts 14.

  Thereafter, as shown in FIGS. 4 and 5, the valve body 5 is moved downward by the rotation of the rotation operation unit 4 a by a handle (not shown), so that the inner peripheral surface of the fluid pipe 1 is elastically deformed and applied in a watertight manner. The conduit of the fluid pipe 1 is cut off, and the fluid pipe 1 is opened by moving upward by the rotation of the rotation operation portion 4a by the handle.

  As described above, the case 2 as the casing is made of resin and includes the contact portion 12b of the branch pipe 12 that contacts the outer surface 1a of the fluid tube 1, the contact portion 12b, and the outer surface 1a of the fluid tube 1. And heating wire 13 as a heating part that heat-fuses each other by heating, and is formed on the outer surface 1a of the fluid tube 1 so as to be disposed in the direction of the perforation Q, so that the fluid tube 1 The space above the fluid pipe 1 required for drilling the perforation Q can be used as a space for approaching and arranging the case 2 with respect to the outer surface 1a of the fluid pipe 1, so that it counters the perforation Q of the fluid pipe 1. The water control valve 10 can be installed in a state in which space saving is achieved without using the space below the fluid pipe 1 on the side of the fluid pipe 1, and the outer surface 1a of the fluid pipe 1 heated by the heating wire 13 and the contact portion 12b integrated with heat fusion It is possible to improve the water-tightness by.

  Next, the water control valve 20 according to the second embodiment will be described with reference to FIGS. 6 and 7. In addition, the same structure as the said Example is abbreviate | omitted.

  The case 2 ′ fixedly attached to the outer peripheral surface of the fluid pipe 1 is a so-called split T-shaped pipe, and includes a branch pipe 12 ′ and a valve having an inner space in the vertical direction substantially perpendicular to the pipe axis of the fluid pipe 1. It consists of a lid 3 and a cover 22 that covers the lower side of the outer periphery of the fluid pipe 1.

  As shown in FIG. 6, the branch pipe 12 'is made of high-density polyethylene, and has the same upper flange 12a, contact portion 12b, inner space portion 12c, and contact surface 12d as the branch tube 12 in the above embodiment. In addition, a flange portion 12e made of high-density polyethylene continuous with the contact portion 12b protrudes in the outer diameter direction of the fluid pipe 1, and a heating wire 13 extended in the contact portion 12b is connected to the flange portion 12e. It also extends inside.

  The cover 22 covers the lower side of the fluid pipe 1 that opposes the contact portion 12b of the branch pipe 12 that covers the upper side of the fluid pipe 1 in which the perforation Q is drilled. A flange 22e facing the portion 12e is formed to protrude. As shown in FIG. 7, the cover 22 is made of high-density polyethylene, which is a resin, and serves as a heating unit that generates heat when current flows in the contact portion 22 b that contacts the outer surface 1 a of the fluid pipe 1. The heating wire 23 is continuously extended over substantially the entire contact surface. Each end portion of the heating wire 23 is connected to connection portions 25 and 25 provided on the outer surface of the cover 22 so as to be electrically connected to an external power supply line. The material of the contact portion 22b is not limited to high-density polyethylene, but may be other heat-bondable material made of polyolefin resin or a predetermined resin, but is made of the same material as the branch pipe 12 'and the fluid pipe 1. It is preferable.

  As in the first embodiment, a power cable connected to an external power source (not shown) is connected to each connection portion 15 and 15 of the branch pipe 12 ', and power is supplied from the external power source for a predetermined time. When the heated heating wire 13 generates heat to a high temperature, as shown in FIG. 7, the contact surface 12d of the contact portion 12b made of resin and the fluid pipe 1 in contact with the contact surface 12d As the outer surface 1a is heated and gradually melted, as shown in FIG. 6, the flange portion 12e of the branch pipe 12 'and the flange portion 22e of the cover 22 are melted and integrated, so that the cover 22 is integrated with the branch pipe 12'. Is provided.

  Further, the heating wire 23 supplied with power through each connection portion 25 generates heat to a high temperature, and the contact surface of the contact portion 22b of the cover 22 made of resin, and the outer surface of the fluid pipe 1 in contact with the contact surface. The cover 22 is thermally fused to the outer surface of the fluid pipe 1 by heating and gradually melting 1a.

  As described above, the cover 22 provided on the branch pipe 12 'covers the outer surface 1a of the fluid pipe 1 on the side facing the contact portion 12b, so that the valve body 5 supported by the valve lid 3 is provided. When the flow path of the fluid pipe 1 is closed via the perforation Q, even if a reaction force is applied to the side away from the fluid pipe 1 with respect to the case 2 ′, the reaction force can be countered by the cover 22.

  Further, the cover 22 is made of resin and is provided on the branch pipe 12 'by heat fusion, so that the cover 22 can be integrated with the branch pipe 12', and the material of the cover 22 and the branch pipe 12 'is also provided. Can be shared.

  Next, the water control valve 30 according to the third embodiment will be described with reference to FIG. It should be noted that the same components as those shown in the above-described embodiment are denoted by the same reference numerals and redundant description is omitted.

  As shown in FIG. 8, bands 21 and 21 are formed on the outer surface of the contact portion 12 b of the branch pipe 12 and the outer surface 1 a of the fluid tube 1 and press the contact portion 12 b toward the outer surface 1 a of the fluid tube 1. The fluid pipe 1 is wound in the circumferential direction at both locations sandwiching the perforations Q in the tube axis direction.

  In this way, the contact portion 12b is pressed against the outer surface 1a of the fluid tube 1 by the band 21 wound in the circumferential direction of the fluid tube 1, so that the contact portion 12b and the outer surface 1a of the fluid tube 1 are brought into contact with each other. The heat sealing region can be ensured by abutting with certainty, and when the valve body 5 supported by the valve lid 3 closes the flow path of the fluid pipe 1 through the perforation Q, the fluid is in contact with the case 2. Even if a reaction force is applied to the side away from the tube 1, the reaction force can be countered by the band 21. .

  Next, the water control valve 40 according to the fourth embodiment will be described with reference to FIG. It should be noted that the same components as those shown in the above-described embodiment are denoted by the same reference numerals and redundant description is omitted.

  The case 2 ″ of the present embodiment further includes an extending portion 27 made of metal that extends along the operation direction of the valve body 5 between the branch pipe 26 and the valve lid 3. The portion 27 has an inner space portion 27c in the vertical direction substantially orthogonal to the tube axis of the fluid tube 1, and is fitted in a watertight manner inside the branch tube 26 by an O-ring 28 interposed between the portion 27 and the branch tube 26. The bolts and nuts 14 are inserted through the upper flange 26 a of the branch pipe 26, the upper flange 27 a of the extending portion 27 extending on the upper surface thereof, and the ring-shaped flange 9 placed on the valve lid 3. The branch pipe 26, the extending portion 27, and the flange 9 are fastened.

  As described above, since the extending portion 27 made of metal extends along the operation direction of the valve body 5, the structural strength of the case 2 ″ is increased, and a force is applied by the operation of the valve body 5. Can maintain the shape of the case 2 ″.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the embodiment, the cover 22 is configured in the second embodiment in addition to the first embodiment, the band 21 is configured in the third embodiment, and the band 21 and the extending portion 27 are configured in the fourth embodiment. However, the cover 22, the band 21, and the extending portion 27 may be selectively configured as appropriate, individually or in combination.

1 Fluid pipe 2, 2 ', 2 "Case 3 Valve cover 4 Rotating screw 5 Valve body 10 Water control valve (control valve)
12, 12 'Branch pipe 12b Contact part 12d Contact surface 13 Heating wire (heating part)
20, 30, 40 Water control valve (control valve)
21 Band 22 Cover 26 Branch pipe 27 Extension part

Claims (5)

A casing that water-tightly covers an outer surface of a fluid pipe made of resin, and a valve body that is supported by the casing and that operates through a perforation formed in the fluid pipe within the casing. A flow control valve that is installed in a continuous flow state and can open and close the flow path of the fluid pipe,
The housing is made of resin and includes a contact portion that contacts the outer surface of the fluid pipe, and a heating portion that heat-bonds the corresponding contact portion and the outer surface of the fluid pipe to each other, and A flow control valve, wherein the flow control valve is formed on an outer surface of the fluid pipe so as to be disposed in a drilling direction.   The flow control valve according to claim 1, wherein a cover that covers an outer surface of the fluid pipe on a side facing the contact portion is provided on the casing.   The flow control valve according to claim 2, wherein the cover is made of resin and is provided on the casing by heat fusion.   4. The flow control valve according to claim 1, wherein a band that presses the contact portion toward the outer surface of the fluid pipe is wound in a circumferential direction of the fluid pipe.   The said housing | casing is further provided with the extending part which consists of metal extended along the operation direction of the said valve body, The flow control valve in any one of Claim 1 thru | or 4 characterized by the above-mentioned.

Images