JP2014119100A - Connection structure of valve device and connection method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure of a valve device that can accurately adjust an arrangement position of a valve body part while simplifying a piping structure, and can always arrange a socket of a piping unit on a connection direction side, and provide a connection method of the valve device.SOLUTION: A connection structure of a valve device includes; a cut pipe 2 whose both ends work as spigots, a valve device 1 provided with socket parts 4, 5 capable of inserting the end part of the cut pipe 2 at both ends and a valve body part 6 in the vicinity of the center, and a push ring 11 (fixation means) that fixes the valve device 1 and the cut pipe 2 inserted into the valve device 1.

Description

  The present invention relates to a connection structure for a valve device arranged in a piping network and a connection method therefor.

  Conventionally, a flow control valve device (valve device) piped between fluid pipes has a valve body for switching a flow path near the center, and a receiving port connection is formed at both ends of the valve body. There is known one in which a part (receiving part) and an insertion-shaped connecting part (insertion part) are formed (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 2000-1881 (page 2, FIG. 2) Japanese Patent No. 4204337 (page 6, FIG. 1)

  However, in Patent Document 1, although the piping network is configured to be connected to each other based on a pre-calculated design, there are often cases where the design dimensions do not slightly match the actual design dimensions. There is a problem that a valve body that needs to be arranged at an accurate position is displaced from a design position. Therefore, there is a technique for cutting a fluid pipe as necessary, and connecting the cut pipe whose dimensions have been adjusted in this way to a pipe joint to eliminate the dimensional deviation in the piping network (see, for example, Patent Document 2). According to this, the said valve body can be arrange | positioned in the position as designed by applying the said cut pipe and pipe joint in the middle of piping connected to the valve apparatus in patent document 1. FIG.

  In addition, a general fluid pipe is a piping unit having a receiving port and an insertion port at both ends, and is sequentially connected in one direction so that the insertion port is connected to the receiving port of the piping unit that has already been piped. The pipe network is configured. And in such a pipe network, since the pipe joint described in FIG. 7 of Patent Document 2 is provided with receiving ports at both ends, the pipe unit is always connected to the receiving port in the pipe network by using this pipe joint. Since it can arrange | position to the direction side, when using the predetermined distance away from the said pipe joint and adjusting the position of a valve body, piping using a cut tube is attained again.

  However, when adjusting the arrangement position of the valve body in the valve device of Patent Literature 1 using the pipe joint of Patent Literature 2, the valve device including the valve body and the above-described pipe joint are separate members. Therefore, not only is the accuracy of adjusting the position of the valve body using cut pipes and pipe joints low, but in most cases the position of the valve device needs to be adjusted when piping. It was necessary to use a cut pipe and the pipe joint, and piping work was complicated.

  The present invention has been made by paying attention to such problems, and can simplify the piping structure and accurately adjust the arrangement position of the valve body, so that the receiving port of the piping unit is always on the connection direction side. It is an object of the present invention to provide a connection structure of a valve device that can be arranged and a connection method thereof.

In order to solve the above problems, the connection structure of the valve device of the present invention is:
A cut tube with both ends serving as insertion ports, and a receiving portion into which both ends of the cut tube can be inserted are provided at both ends, and a valve device having a valve body portion near the center thereof, and the valve device inserted into the valve device It has a fixing means for fixing the cut tube and the valve device.
According to this feature, since the cut tube directly inserted into the valve device can be fixed by the fixing means, the arrangement position of the valve body portion can be adjusted only by the valve device, so the adjustment accuracy of the arrangement position of the valve body portion is high. In addition, since the valve device has a receiving portion at both ends, when a cut tube is connected to one of the receiving portions, the pipe connected before the valve device may always point the receiving port in the connecting direction. Is possible.

The connection structure of the valve device of the present invention is
The valve device is characterized in that a step portion for restricting insertion of the cut tube is formed inside the receiving portion.
According to this feature, the valve body can be positioned at a predetermined arrangement position only by determining the position of the end in the connecting direction of the cut tube.

The connection structure of the valve device of the present invention is
An anticorrosion member is interposed between the step portion of the receiving portion and the tube end surface of the cut tube in the valve device.
According to this feature, since the cut tube is fixed to the valve device by the fixing means in a state where the anticorrosion member is sandwiched between the step portion of the receiving portion and the tube end surface of the cut tube, the tube end surface of the cut tube is effective. Thus, it is possible to prevent corrosion and to maintain the corrosion prevention state of the pipe end face.

The connection structure of the valve device of the present invention is
The dimension from one receiving part to the valve body part in the valve device is longer than the dimension from the other receiving part to the valve body part.
According to this feature, by selecting either one of the receiving portions, the distance between the insertion port of the installed piping unit or the end of the cut tube and the valve body portion can be adjusted.

The valve device connection method of the present invention includes:
A step of preparing a cut tube cut to a length necessary for connecting a receiving port of an installed piping unit, and having a receiving port at both ends and connecting the receiving port in a positioned valve device; The method includes a step of fixing one of the cut tubes to a receiving port of a piping unit, and a step of fixing the valve device to the other of the cut tubes using a fixing means.
According to this feature, the cut tube cut to a length necessary to connect the receiving portion of the positioned valve device is directly inserted into the valve device having the valve body portion and fixed. Since it is fixed using the means, the arrangement position of the valve body can be adjusted only by the valve device, and the adjustment accuracy of the arrangement position of the valve body is high. In addition, since the valve device has the same shape of the receiving port at both ends, when a cut tube is connected to one of the receiving ports, the pipe connected before the valve device always has the receiving port in the connecting direction. Can be directed.

The valve device connection method of the present invention includes:
After the anticorrosion member is temporarily fixed to the pipe end surface of the cut tube, the cut device is connected to the valve device by the fixing means in a state where the anticorrosion member is pressed against the stepped portion in the receiving portion of the valve device. It is characterized by being fixed against.
According to this feature, since the cut tube is fixed to the valve device by the fixing means in a state where the anticorrosion member is sandwiched between the step portion of the receiving portion and the tube end surface of the cut tube, the tube end surface of the cut tube is effective. Thus, it is possible to prevent corrosion and to maintain the corrosion prevention state of the pipe end face.

It is a partially broken side view which shows the valve apparatus in Example 1. FIG. It is a partially expanded sectional view which shows the anticorrosion member attached to the end surface of a cut tube. It is a partially expanded sectional view which shows a fixing means. (A) is a figure which shows a mode that one side of a cut tube is connected to the receptacle of piping, (b) is a figure which shows a mode that a valve apparatus is connected to the other side of a cut tube. It is a figure which shows a mode that the valve apparatus was piped by the piping network. It is a partially broken side view which shows the modification of the valve apparatus in Example 1. FIG. It is a partially broken side view which shows the valve apparatus in Example 2. FIG. It is a partially broken side view which shows the valve apparatus in Example 3. FIG.

  EMBODIMENT OF THE INVENTION The form for implementing the connection structure of the valve apparatus which concerns on this invention, and its connection method is demonstrated below based on an Example.

  The connection structure of the valve device according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the cut tube 2 and the piping unit 3 of the present embodiment are made of, for example, ductile cast iron for waterworks buried in the ground, and are formed in a substantially circular shape in cross section, and the inner peripheral surface is Covered with a mortar layer. The fluid pipe according to the present invention may be made of other metals such as cast iron and steel, or made of asbestos, concrete, vinyl chloride, polyethylene, or polyolefin. Furthermore, the inner peripheral surface of the fluid pipe is not limited to the mortar layer, and may be coated with, for example, an epoxy resin or the like, or an appropriate material may be coated on the inner peripheral surface of the fluid pipe with powder coating. In this embodiment, the fluid in the fluid pipe is clean water, but is not limited to clean water in this embodiment. For example, in addition to industrial water, agricultural water, sewage, etc., gas or gas-liquid mixture of gas and liquid It does not matter.

  As shown in FIG. 1, the connection structure of the valve device of the present invention includes a valve device 1, a cut tube 2 having both ends as insertion holes, and a push ring 11 as a fixing means. A valve body 6 that opens and closes the flow path between the cut tube 2 and the piping unit 3 is provided at the substantially central portion, each having a receiving portion 4 and 5 having the same shape into which the end of the pipe 2 or the piping unit 3 can be inserted. I have.

  The valve body portion 6 is configured to be hermetically connected to a flange 1 a formed in the valve device 1. Specifically, the control unit 6c includes an operation unit 6c that can be gripped and rotated by a user, and a shaft member 6b that is connected to the valve device 1 from the operation unit 6c and has a valve body 6a fixed to the tip. The valve body 6a can open and close the flow path between the base tube portions 7 and 8 by the rotation operation.

  The inner diameters of the receiving portions 4 and 5 are formed larger than the outer diameters of the cut tube 2 and the piping unit 3, and the base tube portions 7 and 5 are provided between the receiving portions 4 and 5 and the valve body portion 6. 8 are formed, and the inner diameters of the base tube portions 7 and 8 are formed to be approximately the same as the inner diameters of the cut tube 2 and the piping unit 3, respectively. And the step parts 4c and 5c are formed by the internal-diameter difference of the port parts 4 and 5 and the base pipe parts 7 and 8. FIG.

  Retaining strips 4b and 5b into which rubber-made annular packings 10 and 10 are fitted are formed at the end portions 4a and 5a of the inner peripheral surfaces of the receiving portions 4 and 5, respectively, and further inward from the retaining strips 4b and 5b. Concave strips 4d and 5d are formed on the side, and a lock ring 50 having a substantially C shape or the like whose diameter is reduced by elastic return can be fitted into the concave strips 4d and 5d.

  The piping unit 3 has an insertion port 3a having a flange 30a at the tip, and a receiving port 3b is formed at the other end (see FIG. 5), and the receiving port into which the lock ring 50 described above is fitted. 5 is inserted.

  When the piping unit 3 is inserted into the receiving portion 5, the lock ring 50 is temporarily expanded in diameter by inserting a diameter expanding means (not shown) into the receiving portion 5. By inserting the insertion port 3 a of the piping unit 3 into the receiving port 5, the flange portion 30 a can be inserted inward from the lock ring 50. Then, after the insertion of the insertion port 3a of the piping unit 3 is completed, the locking means 50 is elastically restored by releasing the diameter expanding means, and the collar portion 30a is locked to the locking ring 50. Is retained.

  Further, the piping unit 3 is inserted into the receiving portion 5 with the packing 10 on the outer periphery and the pusher wheel 110 set behind the packing 10, and after the insertion of the insertion port 3a is completed, the pusher wheel 110 and the flange are inserted by a bolt (not shown). By fastening 5e, the packing 10 is pressed and the space between the piping unit 3 and the valve device 1 is sealed.

  On the other hand, the cut tube 2 is a so-called straight tube having both ends as insertion holes, and can be cut by an engine cutter or the like at a construction site as necessary when dimensional deviation occurs in piping work. The cut tube 2 is connected to the receiving portion 4 of the valve device 1 with its cut surface, that is, the tube end surface 2a, protected by the anticorrosion member 16.

  As shown in FIG. 2, the anticorrosion member 16 includes an anticorrosion material 17 that prevents the pipe end surface 2 a of the cut tube 2, a holding portion 18 that holds the anticorrosion material 17 between the cut tube 2, and an anticorrosion material 17. The holding portion 18 is formed of a synthetic resin material having elasticity such as polypropylene so as to form an annular shape when viewed from the front. The material of the holding portion 18 may be made of a soft resin material such as polycarbonate, polyacetal, and urethane resin, or a metal such as stainless steel.

  The holding part 18 extends substantially perpendicularly toward the inner diameter direction from a cylindrical fitting piece 18a fitted on the end of the cut tube 2 and an end 18b on the cut pipe 2 side of the fitting piece 18a. The holding tube 18c facing the tube end surface 2a of the cutting tube 2 is formed in a substantially L-shaped cross-sectional shape.

  Although not shown here, the fitting piece 18a has a shape that gradually decreases in the direction of the cut tube 2 in a natural state, and two engagement protrusions 18d that are spaced apart in the tube axis direction on the inner peripheral surface thereof. , 18e are projected. The engagement protrusions 18d and 18e contact the outer peripheral surface 2b of the cut tube 2 when the fitting piece 18a is externally fitted to the end of the cut tube 2 to prevent the anticorrosion member 16 from being removed. However, it is possible to reduce or omit one of the engaging protrusions 18d and 18e by bringing the fitting piece 18a itself into contact with the fluid pipe, or the number of the engaging protrusions 3 Two or more may be provided to increase the engagement force with the outer peripheral surface 2b of the cut tube 2.

  In this embodiment, the anticorrosion material 17 is formed of a low-rebound elastic material, for example, butyl rubber having adhesive force, and an outer diameter is substantially equal to the inner diameter of the fitting piece 18a, and an inner peripheral surface of the base piece 17a. The contact piece 17b extends toward the tube shaft side and gradually decreases in thickness in the tube shaft direction from the outer diameter side toward the inner diameter side.

  The anticorrosion material 17 is fixed by adhering the base piece 17a to the vicinity of the boundary between the fitting piece 18a and the holding piece 18c with an adhesive or the like. Moreover, the base piece 17a may be attached in the vicinity of the boundary between the fitting piece 18a and the holding piece 18c without using an adhesive due to its own adhesive force. The anticorrosion material 17 is formed of butyl rubber in this embodiment, but the material of the anticorrosion material is, for example, an elastic body such as natural rubber or urethane rubber, a soft resin such as soft vinyl chloride, styrene, or olefin. , Putty and epoxy resin adhesives may be used.

  The pressing portion 19 is formed in a tapered shape in which an opposing surface 19a facing the tube end surface 2a is gradually reduced in diameter in the direction of the cut tube 2, and the holding piece 18c of the holding portion 18 and the contact piece 17b of the anticorrosive material 17 are formed. It is fixed so that it may be inserted into the gap between.

  Further, a press ring 11 is connected to the flange 4e formed in the receiving portion 4, and this press ring 11 is engaged with the outer peripheral surface of the cut tube 2 by an engaging means described later, thereby preventing the cut tube 2 from coming out. It has come to be.

  The pusher wheel 11 is formed in an annular shape with a slightly larger diameter than the outer peripheral surface of the cut tube 2, and a through-hole (not shown) penetrating toward the flanges 4 e and 5 e is formed on the outer peripheral surface of the pusher wheel 11. A plurality of holes are formed at predetermined intervals in the direction, and a connection bolt (not shown) is inserted into each through-hole to be connected to the flange 4e. By fastening the flange 4e and the pusher wheel 11, the pusher wheel 11 presses the packing 10, and as a result, the pusher wheel 11 prevents the packing 10 from coming off and the sealed state between the cut tube 2 and the valve device 1 is maintained. ing.

  Further, as shown in FIG. 3, a plurality of arc-shaped concave portions 11a, 11a,... Continuous in the circumferential direction are formed on the inner peripheral surface of the push ring 11 so as to form a substantially concave shape in cross-section opening in the inner diameter direction. The claw members 20, 20,... Are accommodated in the recesses 11a, 11a,. The claw member 20 has a tapered surface 20a formed on the upper portion thereof, and an abutting member 21 having a shape that abuts on the tapered surface 20a of the claw member is disposed on the upper portion thereof.

  And the front-end | tip of the volt | bolt 30,30, ... penetrated in the recessed part 11a from the outside contacts the upper part of the contact member 21, and this volt | bolt 30,30, ... is screwed in, respectively. Are pressed against the claw members 20, 20,... So that the blade portions 20b, 20b,... Of the claw members 20, 20,. Act on.

  As described above, the cut tube 2 is connected to the valve device 1 with the anticorrosion member 16 attached to the end thereof until the holding piece 18c of the anticorrosion member 16 contacts the stepped portion 4c of the receiving portion 4. In the inserted state, the pusher 11 is fixed so as not to come off. According to this, since the anticorrosion material 17 is pinched by the tube end surface 2a of the cut tube 2 and the stepped portion 4c of the receiving portion via the holding piece 18c and the pressing portion 19, the anticorrosion material 17 and the cut tube 2 It is possible to effectively prevent fluid from flowing into the tube end surface 2a.

  Subsequently, a method of actually connecting the valve device 1 will be described with reference to FIGS. 4 and 5. As shown in FIG. 5, the valve device 1 is piped between a pipe unit B and a pipe unit C having a receiving end / insertion-shaped end, and the base pipe part 7 side and the base pipe part 8 side. The channel can be opened and closed.

  As FIG. 5 shows, the piping unit B has the receiving port 500 and the insertion port 400 in the edge part, and the arrangement | positioning order of the receiving port 500 and the insertion port 400 is constant based on the design stood in advance. The insertion port 400 is inserted into the receiving port 500 of the adjacent piping unit A and connected.

  When the position of the valve body 6 in the valve device 1 is different from the design position O when the pipe unit B, the cut tube 2 and the valve device 1 are temporarily assembled, the cut tube 2 is removed by a cutter device (not shown). Cut and adjust the position.

  Subsequently, as shown in FIG. 4 (a), after the pipe end surfaces 2a, 2a of the cut pipe 2 are protected by the anticorrosion members 16, 16, one is inserted into the receiving port 500 of the piping unit B, The cut tube 2 and the piping unit B are fixed by the push ring 11 (see FIG. 4B). At this time, as shown in FIG. 4 (b), the anti-corrosion member 16 is fixed in a state where it is sandwiched between the pipe end surface 2 a of the cut pipe 2 and the step portion 500 a of the receiving port 500 of the pipe unit B, whereby the cut pipe 2 The pipe end surface 2a can be reliably prevented from being corroded, and the end of the cut tube 2 cut by the stepped portion 500a of the receiving port 500 is positioned, and the valve body 6 described later can be positioned at a predetermined arrangement position.

  Next, as shown in FIG. 4B, the other end of the cut tube 2 is inserted into the receiving portion 4 of the valve device 1, and the cut tube 2 and the piping unit B are fixed by the pusher wheel 11. As described above, the cut tube 2 is fixed in a state where the anticorrosion member 16 is sandwiched between the insertion port 3a and the stepped portion 4c of the receiving port.

  Then, the piping unit 3 is connected so that the receiving port 3b is directed to the connection side by inserting the insertion port 3a into one of the receiving ports 5 of the valve device 1, and subsequently connected to the receiving port 3b. The insertion port 400 of the connected piping unit C is inserted. In the same manner, the piping unit C and the subsequent units are connected in order to the piping ports to form the piping network.

  In addition, the distance between the stepped portion 500a of the receiving port 500 of the piping unit B and the stepped portion 4c of the receiving port portion 4 of the valve device 1 during temporary assembly is measured, and the cut tube 2 is exactly as measured. If cut, the cut tube 2 and the anticorrosion members 16, 16 come into contact with the stepped portion 500 a of the receiving port 500 of the piping unit B and the stepped portion 4 c of the receiving portion 4 of the valve device 1, so that the valve body portion 6 can be accurately placed at the design position O. That is, the installation position of the valve body 6 can be accurately set by the cutting amount of the cut tube 2.

  As described above, the valve device 1 according to the present invention can fix the cut tube 2 directly inserted into the valve device 1 by the fixing means, so that the arrangement position of the valve body portion 6 can be adjusted only by the valve device 1. The adjustment accuracy of the arrangement position of the body part 6 is high.

  Further, since the valve device 1 includes the receiving portions 4 and 5 having the same shape at both ends, the cut tube 2 is connected to one receiving portion 4 and the piping unit 3 adjacent to the other receiving portion 5 is connected. As shown in FIG. 5, piping (for example, the piping unit C) connected before the valve device 1 is always a receiving port (not shown). Can be directed in the connection direction, and when it is necessary to connect a cut pipe (not shown) again at a predetermined distance from the valve device 1 in the piping network, it is necessary to reverse the insertion / receiving port separately. For this reason, pipe joints having different specifications are not required, and the structure of the piping network can be simplified.

  Although the cut tube 2 is connected to the receiving port 4 of the valve device 1, the cut tube 2 is connected to the receiving port 5 and is inserted into the receiving port 4. 3 may be connected, or the cut tube 2 may be connected to both the receiving ports 4 and 5.

  The anticorrosion members 16 and 16 attached to the pipe end surfaces 2a and 2a of the cut pipe 2 are brought into contact with the stepped portion 500a in the receiving port 500 of the piping unit B and the stepped portion 4c in the receiving portion 4 of the valve device 1. Although described in the embodiment, for example, by providing a gap between the anticorrosion members 16 and 16 and the step portion 500a in the piping unit B and the step portion 4c in the valve device 1, this gap is formed into the valve body portion 6. It can also be used as an adjustment allowance for fine adjustment of the arrangement position of.

  In addition, like the modification shown in FIG. 6, the dimension of the valve body part 6 ′ from one receiving part 4 ′ and the dimension of the valve body part 6 ′ from the other receiving part 5 ′ in the valve device 1 ′ According to this, by selecting one of the receiving portions, it is possible to insert a pipe unit that has already been installed by using the dimensional difference between the base pipe portions 7 ′ and 8 ′. The distance between the end of the cut tube 2 'and the valve body 6' can be adjusted.

  For example, the distance between the receiving port of the installed piping unit (not shown here) connected by the cut pipe 2 ′ and the receiving portion 4 ′ of the valve device 1 ′ is close, and the piping unit and the receiving portion 4 ′ are close to each other. If the fixing means 11 ′ cannot be arranged between them, the valve device 1 ′ is reversed and the cut tube 2 ′ is inserted into the receiving port 5 ′ having a short distance to the valve body 6 ′, thereby fixing the fixing means 11 ′. You can make an arrangement fee.

  Also, remove one installed piping unit and point the receiving port 4 ′ with a long distance to the valve body 6 ′ toward the receiving port to which this piping unit was connected. You may make the arrangement allowance of fixing means 11 'by passing with pipe 2'.

  Next, the valve device 1 according to the second embodiment will be described with reference to FIG. In addition, the description which overlaps with the same structure as the said Example is abbreviate | omitted.

  As shown in FIG. 7, one of the cut tubes 200 in the present embodiment is dimensionally adjusted by cutting, and an insertion ring 40 described later is attached to the outer peripheral surface near the end of the cut tube 200. It has become. The insertion ring 40 is a substantially C-shaped ring member that can be elastically deformed, and a protrusion 40a is formed over the inner peripheral surface thereof.

  When the cut tube 200 is dimensionally adjusted, an annular groove 41 is formed over the outer peripheral surface 200b in the vicinity of the end thereof. And the pipe end part of the cut tube 200 after a cutting | disconnection can be made into the insertion shape which has a collar part by making the said protruding item | line 40a fit to the said annular groove 41 as FIG. According to this, it is possible to prevent the cut tube 200 from coming off in such a manner that the insertion ring 40 is engaged with the lock ring 50 fitted in the recess 4 d formed on the inner periphery of the receiving portion 4. Therefore, there is no need to provide a push ring or the like around the flange of the receiving portion on the side where the dimension of the cut tube 200 is adjusted, and the retaining structure can be made compact.

  Next, a valve device 1 ″ according to Example 3 will be described with reference to FIG. 8. Note that the description of the same configuration as that of the above example is omitted.

  As shown in FIG. 8, the receiving portions 4 ″ and 5 ″ of the valve device 1 ″ are provided with a plurality of concave portions that are continuous in the circumferential direction on the inner peripheral surface in the vicinity of the end portions and open in the inner diameter direction. Claw members 20 ″, 20 ″,... Are accommodated in the recesses, and concave grooves 40b, 50b are formed on the inner peripheral surface on the inner side of the recesses. 100, 100 are accommodated.

  And the claw member 20 "is adapted so that the tip of a bolt 300 inserted from the outside toward the upper part comes into contact with the upper part of the claw member 20". The blade portions 20a ", 20a", ... of ", ..." act so as to bite into the outer peripheral surface of the cut pipes 2 ", 2". According to this, when the valve device 1 "is finally piped, In addition to being able to adjust the position of the valve body 6 ″, it does not require a separate member such as a press ring to prevent the cutting pipes 2 ″ and 2 ″ from coming off, so construction work is completed in a simple work process. can do.

  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 above-described embodiment, the valve device having the valve body portion 6, 6 ′ or 6 ″ is described as an example. However, any valve device may be used as long as the arrangement position adjustment is necessary. For example, the valve apparatus provided with the rectification valve, the branch port, etc. may be sufficient.

1, 1 ', 1 "Valve device 1a Flange 2, 2', 2", 200 Cutting pipe 2a End face 3, A, B, C Piping unit 3a Insertion 4, 5 Receiving part 4 ', 5', 4 ", 5" Receiving part 4c, 5c Step part 4d, 5d Recess 6, 6 ', 6 "Valve body part 7, 8, 7', 8 'Base pipe part 10, 100 Packing 11, 110 Push ring (fixing means )
16 Corrosion-proof member 17 Corrosion-proof material 18 Holding part 19 Press part 20, 20 "Claw member 30a Gutter part 40 Insertion ring 50 Lock ring

Claims (6)

  A cut tube with both ends serving as insertion ports, and a receiving portion into which both ends of the cut tube can be inserted are provided at both ends, and a valve device having a valve body portion near the center thereof, and the valve device inserted into the valve device A connection structure for a valve device, comprising: a cut tube and a fixing means for fixing the valve device.   The valve device connection structure according to claim 1, wherein the valve device has a stepped portion that restricts insertion of the cut tube inside the receiving portion.   The connection structure for a valve device according to claim 2, wherein an anticorrosion member is interposed between the step portion of the receiving portion and the tube end surface of the cut tube in the valve device.   The dimension from one receiving part to the said valve body part in the said valve apparatus is longer than the dimension from the other receiving part to the said valve body part, The Claim 1 thru | or 3 characterized by the above-mentioned. Valve device connection structure.   A step of preparing a cut tube cut to a length necessary for connecting a receiving port of an installed piping unit, and having a receiving port at both ends and connecting the receiving port in a positioned valve device; A method for connecting a valve device, comprising: fixing one of the cut tubes to a receiving port of a piping unit; and fixing the valve device to the other cut tube using a fixing means. .   After the anticorrosion member is temporarily fixed to the pipe end surface of the cut tube, the cut device is connected to the valve device by the fixing means in a state where the anticorrosion member is pressed against the stepped portion in the receiving portion of the valve device. The valve device connection method according to claim 5, wherein the valve device is fixed with respect to the valve device.

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