JP2008215621A - Valve having diameter-reduced joint part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a valve having a diameter-reduced joint part easily and surely connectable to a pipe by merely tightening a housing to reduce the diameter without working the joined portion of the valve, having excellent durability since it can absorb vibration with proper flexibility against the pipe to which the valve is joined, allowing a pipe joint to be performed for each side, capable of always developing high sealability by maintaining valve function even when joining and removing, and manufacturable at advantageous price. <P>SOLUTION: In this valve having a diameter-reduced joint part 18, a housing 2 is divided into divided parts 2A, 2B, 2C by a dividing mechanism 40. A frame body 10 is integrally fixed into the divided part 2C, and a sealing sleeve 3 is fitted into the frame body 10. A valve element 11 is rotatably fitted into the sealing sleeve 3, and a valve mechanism 4 is installed in the housing 2. The end of the sealing sleeve 3 is extended to the divided parts 2A, 2B, and the one or both of the divided parts 2A, 2B are increased or decreased in diameter to join the pipe P. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a valve used for opening and closing a flow path, controlling a flow rate, and the like, and more particularly, to a valve having a reduced diameter joint portion capable of hermetically joining a joining pipe.

  For example, piping installed in an air conditioning facility, a water supply facility, or the like of a building facility is configured by combining various piping members according to installation conditions. At this time, a valve having a predetermined function may be provided depending on the use of the pipe, but in order to connect the valve and the pipe, the flange joint is joined by a bolt and a nut via a flange provided at the end of these. There are a method, a screwing method using a male screw portion and a female screw portion, a welding method in which a joint portion of a valve and a pipe is joined by welding, or a ferrule joint method.

  The above joining method is generally used, but there are many cases where the piping space is limited, and in such a case, the piping structure becomes complicated because the piping is laid so that the piping fits within a predetermined plane. For example, when using a gasket member, welding work, threading work, or the like, the pipe may be bent and laid. As a result, not only piping stress is applied to joint parts such as valves and joints, but flexibility of the valve and the joint pipe is not allowed, and there is a problem in workability (for example, Patent Document 1). (See FIGS. 1 and 2).

  In addition, this joining method requires fixing a fixed valve along the flow path direction of the pipe in the middle of the pipe, so various single pipes and curved pipes can be attached depending on the length of the pipe. Used to join. For this reason, not only workability | operativity is bad, but there is no flexibility with respect to the flow path direction of piping, for example, it became an unstable element in response to a vibration etc. Therefore, this general joining method has not been able to reliably cope with piping laying sites in different situations.

  By the way, the joint which joins pipes has the flexibility which can respond also to a repeated bending, and has good sealing performance with a pipe, and also various joints excellent in workability | operativity are proposed. For example, as in Patent Literature 2 and Patent Literature 3, a joint is known in which pipes are inserted from both ends of a joint body, and both ends of a housing provided in a C-shaped section are tightened with bolts to connect pipe ends. .

  Non-Patent Document 1 shows the state of use of this type of joint called a coupling joint, and shows an example in which a valve is connected to a housing / water meter exchange lining steel pipe using this joint. It is a thing. FIG. 18 shows a general example of joining of the pipe 102 and the valve 103 using this type of joint 101.

  In FIG. 18, an example in which the valve 103 and the pipe 102 are joined using the coupling joint 101 will be described. First, the male screw 105 a of the joining pipe 105 is screwed to a female screw (not shown) on the inner peripheral side of the valve 103, and a joining portion is provided on the side portion of the valve 103. Subsequently, the joining portion is fitted on one side of the joint 101 and the joining pipe 102 is fitted on the other side of the joint 101 to be temporarily attached. Next, the valve 103 and the pipe 102 are joined by the joint 101 by fastening the fastening bolt 104 of the joint 101. At this time, the fastening bolts 104 and 104 need to be alternately fastened to the joint 101 to prevent one-side fastening. Further, as shown in the figure, when the pipe 102 is joined to both sides of the valve 103, the other pipe 102 is also joined to the valve 103 via the joint 101 in the same manner as described above.

The joints in Patent Documents 2 and 3 and Non-Patent Document 1 and FIG. 18 have good workability and flexibility, but in order to mount a valve on a pipe, as described above, a single unit is separate from this type of joint. There is a problem that the valve must be mounted in the middle of the piping, which not only increases the required number of piping equipment but also reduces workability.
However, when joining a valve to a butt joint part of a pipe by reducing the diameter, only a type in which a coupling type joint is interposed between the valve and the pipe as described above has been proposed. Therefore, joining by this joint has become mainstream.

  For this reason, the present applicant has already applied for the following valves (Japanese Patent Application No. 2005-221969). This is because a sealing sleeve formed of rubber or the like is housed in a diameter-reducible housing, and a valve mechanism having a valve body is built in the housing so that the flow path in the housing can be opened and closed and the flow rate can be controlled. Is a valve having a reduced diameter joint portion in which the joint end of the joining pipe is hermetically sealed with a sealing sleeve.

  According to this valve, there is no need for sealing tips, threading, bolting with gaskets using flanges, welding work, etc., to reduce the burden on the operator and dramatically improve piping workability. Can do. Moreover, since it is not necessary to prepare a valve and a joint separately, the cost can be greatly reduced. In addition, the pipe ends can be joined to each other with excellent flexibility and sealability, and can be applied to fluid piping in various fields as a completely new valve capable of opening and closing the flow path and controlling the flow rate.

  In addition, this valve can easily and reliably perform pipe joining simply by tightening the housing and reducing the diameter, shortening the space between the faces and reducing the installation space. Therefore, it is possible to reduce the cost by combining the joint and the valve. Moreover, this valve can be applied to all valves such as a butterfly valve, a ball valve, a gate valve, a globe valve, a check valve, and a strainer as a valve mechanism for opening and closing the flow path and controlling the flow rate.

Japanese Utility Model Publication No. 57-10666 Japanese Patent No. 1032534 Japanese Patent No. 1157995 “Strab Coupling Grip Type Catalog” Showbond Coupling Co., Ltd., April 2005, p. 7

However, since the valve having the reduced diameter joint portion integrally forms the housing portion and the joint portion, the fastening structure of the grip portion of the joint portion is not independent on the left and right. For this reason, when one tightening bolt is loosened, the grip part on the loose side loosens and the grip part on the other side also loosens, and both grip parts loosen despite joining to one side. was there.
In addition, when the tightening bolt is loosened, the joint part of the sealing sleeve is loosened, and the close contact between the sealing sleeve part and the valve function part that is tightly sealed is also loosened. There was a problem that the sealing performance deteriorated.

  Furthermore, it is possible to make a pipe (for example, a single pipe or a terminal pipe) that joins a pipe to only one side of the valve and closes the valve. When a new pipe is joined, it is impossible to join the pipe without causing leakage between the pipe and the valve that have already been joined for the above reason. For this reason, this valve cannot be disposed at the end of the pipe for the purpose of expanding the pipe, and the valve function is incomplete.

In addition, the valve mechanism part is structured to be held inside the joint by the sealing sleeve, so that the sealing sleeve expands following this when the housing is opened by loosening the tightening bolt. When the valve is loosened, the valve function is not fixed inside the joint, and there is a possibility that the valve mechanism does not fit in the predetermined position even if the tightening bolt is tightened during piping.
In order to prevent this, it is conceivable to provide a member for positioning the stem of the valve mechanism. For example, if a cylindrical member for support is provided around the stem, a connection part for screwing to the housing is provided. In this case, which may lead to leakage. Further, when such another member is provided, there is a problem that the number of parts increases.

  The present invention aims to solve the conventional problems and to provide a valve such as a new useful rotary valve, and simply by tightening the housing and reducing the diameter without processing the joint portion of the valve. In addition, it is a valve that can reliably join pipes, has moderate flexibility with respect to the joined pipes, absorbs vibrations, etc., and has excellent durability. It is an object of the present invention to provide a valve having a reduced diameter joint portion which can be performed and can maintain a valve function at the time of joining and detaching and can always exhibit high sealing performance in terms of cost.

  In order to achieve the above object, according to the first aspect of the present invention, a housing is divided by a dividing mechanism to form a fixed-side divided portion and an expansion / contraction diameter-side divided portion, and an annular frame is formed inside the fixed-side divided portion. The sealing sleeve is attached inside the frame body, and the valve body is rotatably mounted in the sealing sleeve to provide a valve mechanism in the housing, and the end side of the sealing sleeve is connected to the expansion / contraction diameter side. It is a valve having a reduced diameter joint portion provided with a reduced diameter joint portion that extends to a divided portion and expands or contracts one or both of the expanded and reduced diameter side divided portions to join pipes.

  The invention according to claim 2 is a reduced diameter joint in which the upper and lower portions of the frame body are fixed to the housing via an upper and lower stem that rotates the valve body, and both side portions in the flow path direction are fixed to the housing by welding. A valve having a portion.

  The invention according to claim 3 is a valve in which the dividing mechanism has a reduced diameter joint portion which is a slit of a predetermined length formed along the circumferential direction of the housing at a position near the frame body.

  The invention according to claim 4 is a valve in which the slit has a reduced-diameter joint portion formed along one or both circumferential ends of the housing along the circumferential direction.

  According to a fifth aspect of the present invention, there is provided a valve having a reduced-diameter joint portion in which a slit is formed from an intermediate point of both ends in the circumferential direction of the housing to a position where an angle with respect to the center of the housing is at least 90 ° or more from the starting point. It is.

  The invention which concerns on Claim 6 is a valve | bulb which has a diameter-reduction joint part which connected the edge part side of the expansion / contraction diameter side division part by the connection part in the state straddling the fixed side division part.

  The invention which concerns on Claim 7 is a valve | bulb which has a reduced diameter coupling part which provided the connection part integrally or separately with the said housing.

  According to an eighth aspect of the present invention, a spacer that can be fixed using a tightening bolt that expands or contracts the diameter-reducing joint portion is provided in a gap between both ends in the circumferential direction of the housing. It is a valve having a connected reduced diameter joint.

  The invention according to claim 9 is arranged by offsetting the rotation center axis of the valve mechanism and the housing center axis connecting the middle point of both ends in the circumferential direction of the housing and the center of the housing in the circumferential direction, and The valve has a reduced diameter joint portion in which the slit is provided symmetrically with respect to the central axis of the housing.

  The invention according to claim 10 is a valve having a reduced diameter joint portion in which a locking groove for locking the sealing sleeve is formed on the outer peripheral edge of the frame.

  According to an eleventh aspect of the present invention, there is provided a valve having a reduced diameter joint portion in which both ends in the circumferential direction of the housing are provided with a bolt tightening mechanism so that the diameter can be increased and reduced, and a lock mechanism is provided on the inner periphery of both ends of the housing.

  The invention according to claim 12 is a valve having a reduced diameter joint portion in which a slide plate is provided in the vicinity of both ends in the circumferential direction of the housing and between the outer peripheral surface of the sealing sleeve.

  According to a thirteenth aspect of the present invention, the housing is divided into a fixed-side divided portion and an enlarged / reduced-diameter-side divided portion, a valve body is rotatably mounted on the fixed-side divided portion, and a valve mechanism is provided in the housing, The diameter-side split part is provided with a reduced-diameter joint part that expands and contracts the diameter and joins the pipe, and a sealing sleeve that is integrally formed so as to extend from the seal part of the valve body to the seal part of the reduced-diameter joint is mounted in the housing. The sealing sleeve is a valve having a reduced diameter joint portion having a sealing function of a reduced diameter joint portion and a sealing function of a valve mechanism.

  The invention according to claim 14 prevents the deformation from propagating to the valve mechanism when the diameter-reduced joint portion is reduced in diameter at the portion connecting the sealing function of the reduced-diameter joint portion and the sealing function of the valve mechanism in the sealing sleeve. The valve has a reduced diameter joint portion provided with a non-propagating portion such as a tapered portion or a wedge-shaped groove.

  According to the first aspect of the present invention, the housing can be easily and reliably joined to the pipe simply by expanding and reducing the diameter of the housing and tightening the pipe. Vibration can be absorbed after joining, and it has excellent durability, and at the time of pipe joining and removal, it maintains the high sealing performance of the valve mechanism without being affected by the expansion and contraction diameter operation, and has a small flow rate. It is a valve having a reduced diameter joint that can be used for all piping facilities from large to large flow rates. Thereby, it is also possible to easily change the expansion of the piping or the like using one valve body without extracting the fluid in the piping system. In addition, various effects of the valve having the housing-integrated reduced diameter joint portion that does not have the dividing mechanism can be exhibited as they are, and various problems that the housing-integrated type has have can be solved while having this effect. A valve having a reduced diameter joint portion.

  According to the second aspect of the present invention, the rotation axis of the valve body is not inclined in the flow path direction or the valve mechanism is inclined with respect to the housing, and the valve mechanism is firmly integrated with the housing to have a large diameter. This is a valve having a reduced diameter joint portion that can be made compact as a whole because a large-diameter channel can be secured with respect to the valve body.

According to the invention according to claim 3, the valve mechanism can ensure water tightness without propagation of the diameter reducing operation of the diameter reducing joint part by reliably separating the fixed side dividing part and the expansion / contraction diameter side dividing part. The reduced diameter joint portion can be freely expanded and reduced in diameter without being affected by the rigid structure of the valve mechanism. In addition, the lip portion of the sealing sleeve is not deformed when the valve mechanism is assembled, and can be joined while reliably exhibiting high sealing performance during pipe joining.
In addition, when pipes with the same nominal diameter are joined to both sides of the valve body, there is an error in the actual pipe diameter, or different diameter pipes with different nominal diameters or pipes with different materials such as metal and resin are used. Even in the case of joining, the valve can be joined firmly while exhibiting high sealing performance.

According to the invention which concerns on Claim 4, when a slit is provided in one of the housing both ends, the other end can be made to function integrally as a rigid body, and the bending rigidity can be increased. Thus, for example, a reduced diameter joint that can be used for curved parts (curved pipes) in hulls, tunnels, etc., or in places where there is a risk that a heavy load may be applied by people on construction sites, etc. A valve having a portion.
On the other hand, if slits are provided on both ends of the housing, the expansion and contraction diameter deformation of the housing can be increased, so that different diameter pipes having a large difference in pipe diameter can be joined. By joining pipes of different materials, high functionality can be demonstrated as a joint part. In this case, both ends of the housing can be deformed to reduce the diameter of the sealing sleeve into a perfect circle, and high sealing performance can be exhibited after tightening.

  According to the invention which concerns on Claim 5, the diameter of the joint part of a housing which can enlarge a diameter of the joint part of a housing greatly at the time of pipe joining, and can insert a pipe easily and can perform joining work easily by the deeply formed slit. It has a valve.

  According to the invention which concerns on Claim 6, it has a diameter reduction joint part which can ensure the intensity | strength of a housing and can prevent a diameter expansion side division part opening through a slit by internal pressure load, and can maintain the firm joining state of piping. It is a valve.

  According to the invention which concerns on Claim 7, it is a valve | bulb which has a reduced diameter coupling part which can raise the intensity | strength of a housing, connecting with a connection part of a different type according to an installation location. In the case where the connecting portion is provided integrally with the housing, the end portion side of the enlarged / reduced diameter side split portion is firmly connected to each other, and in particular, a valve having a reduced diameter joint portion capable of improving the strength in the inter-surface direction. Can provide. On the other hand, when the connecting portion is provided separately from the housing, a valve having a reduced diameter joint portion that can be piped on one side can be provided by allowing the left and right expanded / reduced diameter side divided portions to be individually expanded / reduced.

  According to the eighth aspect of the present invention, the right and left expansion / contraction diameter side divided portions can be individually expanded and contracted to perform one-side piping, and at the time of both-side piping, while confirming the tightening state of both expansion / contraction diameter side division portions It is a valve having a reduced diameter joint portion that can be tightened evenly and can be firmly joined while increasing the degree of coaxiality by preventing the vibration of the piping during joining.

  According to the invention according to claim 9, it is possible to prevent the connecting part or the spacer from interfering with the fixed part side divided part, and to securely tighten the expansion / contraction diameter side divided part via the connecting part or the spacer, and The valve has a reduced-diameter joint portion that can prevent the slit from being opened by the slit by uniformly receiving the pressure in the slit with the internal pressure averaged with respect to the circumferential direction of the pipe.

  According to the tenth aspect of the present invention, the sealing sleeve can be prevented from moving with respect to the frame body, and when the valve body is rotated, the sealing sleeve near the valve body is prevented from being kinked and sealed. It is a valve having a reduced diameter joint portion that can improve the stability of the time.

  According to the eleventh aspect of the present invention, the reduced diameter joint portion that can easily join the pipe to the valve main body and can exhibit excellent retaining performance after joining and firmly join the pipe. It has a valve. In addition, the valve can exhibit excellent flexibility and can maintain a strong joined state against vibration such as an earthquake.

  According to the invention which concerns on Claim 12, it can join piping by the high sealing performance in each side part of a housing, can prevent the leakage from a fastening site reliably, and exhibits the outstanding prevention effect of piping. It is a valve having a reduced diameter joint portion capable of. And it is a valve which can prevent a deformation | transformation of the slide plate main body at the time of bolt fastening, and does not have a bad influence on the sealing performance of a valve mechanism at the time of piping joining.

  According to the invention of claim 13, by integrating the two sealing functions into the sealing sleeve, the valve having a reduced diameter joint portion that simplifies the sealing of the entire valve and reliably prevents fluid leakage to the outside. It is.

  According to the invention of claim 14, when the diameter reduction side of the sealing sleeve is deformed by the diameter reducing operation of the diameter reducing joint portion, this deformation can be prevented from propagating to the seal function part of the valve mechanism. It is a valve which has a reduced diameter joint part which can maintain the sealing functionality.

  Hereinafter, an embodiment of a valve having a reduced diameter joint portion according to the present invention will be described in detail with reference to the drawings. 1 to 6 show a first embodiment of a valve having a reduced diameter joint portion of the present invention. In this embodiment, the valve having the reduced diameter joint portion is applied to the butterfly valve, but it can also be applied to various valves such as a ball valve.

  1 and 2, a housing 2 constituting the outer shape of the valve body 1 is made of a single metal material such as stainless steel, and this material is formed into a substantially C-shaped cross section as shown in FIG. 6 by press molding. ing. Both end sides of the housing 2 are projected to an appropriate length, and the protruding portions are bent to the inner diameter side to form flange portions 5 and 5. The housing 2 in the present embodiment is preferably formed by extending the surface rather than between the joint surfaces of the same size, and the width of the frame body 10 built in the housing 2 by extending the surface in this way. Can be provided, and the valve body 11 can also be prevented from contacting the pipe end.

  A split mechanism 40, 40 having a predetermined length is formed along the circumferential direction of the housing 2 at both ends in the inner peripheral direction of the housing 2, and the end portion of the housing 2 is expanded and contracted by the split mechanism 40, 40. The radial side divided portions 2A and 2B and the fixed side divided portion 2C are divided. The valve main body 1 is provided with a reduced diameter joint portion 18 in the divided portions 2A and 2B and a valve mechanism 4 in the divided portion 2C.

The division parts 2A and 2B are formed longer than the division part 2C and have such a length that can be folded back to the outer peripheral side. The divided portions 2A and 2B are provided in a substantially C-shaped cross section when folded. Meanwhile, division unit 2C is provided so as to be a substantially C-shape in the absence of being folded back on the outer circumferential side is provided with a notch 2C ₁ of substantially semicircular shape in the end portion side.
The dividing mechanisms 40, 40 are provided in such a size that the folded portion does not interfere with the divided portion 2C when the divided portions 2A, 2B are folded. Further, arc-shaped enlarged diameter cutout portions 41 are formed in the rear end portion of the dividing mechanism 40, respectively, and tightened when the reduced diameter joint portion 18 and the valve mechanism 4 are configured by the enlarged diameter cutout portions 41. The clamping stress prevents the tip end side of the dividing mechanism 40 from cracking.

  The dividing mechanism 40 is a slit having a predetermined length formed in the circumferential direction of the housing 2 in the vicinity of fixing the frame body 10 to be described later. A pretension width of the slit 40 is arbitrarily provided for the housing 2. be able to. In the present embodiment, slits 40 are formed along the circumferential direction at both ends of the housing 2 in the circumferential direction. Furthermore, since the valve body 1 has a structure in which the frame body 10 is integrated with the housing 2 by fixing means such as welding or bolting as will be described later, the slit 40 can be provided short.

  In addition to providing the slits at both ends in the circumferential direction, the slits may be provided only at one end of the housing 43 as shown in another example of FIG. In this case, the slit 44 is provided on the rod-shaped nut 25 mounting side in FIG. The length (not shown) of the slit 44 is formed longer when the housing 43 is provided in the same size as the housing 2 of FIG. 6 than when the housing 43 is provided on both sides like the housing 2. The diameter of the joint main body can be reduced, and for example, a pipe P having a large pipe diameter difference can be joined to both ends. It is desirable that the length of the slit 44 is set to be not more than twice the length of the slit 40.

  As described above, the reduced-diameter joint portion 18 is formed on both sides of the housing 2 via the slit 40. In the reduced-diameter joint portion 18, the openings 2a and 2a at both ends in the circumferential direction of the housing 2 are bolted. The mechanism 23 is provided so as to freely expand and contract. A lock mechanism 35 is provided on the inner periphery of both ends of the housing 2 near the bolt tightening mechanism 23. In addition, the aspect of the reduced diameter joint part 18 in this embodiment is an example, Comprising: It does not limit to this.

  The bolt tightening mechanism 23 includes a tightening bolt 26, a rod-shaped washer 24, and a rod-shaped nut 25, and the bolt tightening mechanism 23 is provided with the reduced diameter joint portions 18 and 18 so as to be able to expand and contract, respectively. The reduced diameter joint portion 18 is provided so that both ends in the circumferential direction can be fastened by the bolt fastening mechanism 23 via the slit 40 and the pipe P can be joined. At this time, by providing the slit 40, the reduced diameter joint portion 18 can be expanded and contracted independently.

The long holes 2b and 2c are perforated at an appropriate length in the circumferential direction with respect to the respective bent portions of the divided portions 2A and 2B, and when the bent portion is folded, the long holes 2b on one side are changed to the other long holes. It is provided so that the bolt 26 can be inserted into and removed from 2c.
When forming the opening side of the divided portions 2A, 2B, as shown in FIG. 2, the rod-shaped washers 24, 24 are sandwiched inside the folded portion on the side where the bolts 26, 26 of the divided portions 2A, 2B are inserted, On the other hand, the rod-shaped nuts 25 and 25 are sandwiched inside the folded portion on the other side, and the end side of each folded portion is fixed by welding means such as spot welding. Thereby, the rod-shaped washer 24 and the rod-shaped nut 25 are fixed.

The rod-shaped washer 24 has a through-hole 24a into which the male screw 26a of the bolt 26 can be inserted, and the rod-shaped nut 25 has a female screw 25a into which the male screw 26a can be screwed.
The bolt 26 is inserted into the through hole 24 a of the rod washer 24 from the long hole 2 b on the rod washer 24 side, and the screw 26 a is screwed into the female screw 25 a of the rod nut 25. Thereby, the bolt fastening mechanism 23 is configured, and when the bolt fastening mechanism 23 is fastened, the diameter of the housing 2 can be reduced.
The rod-shaped washer 24 and the rod-shaped nut 25 are individually attached to the divided portions 2A and 2B, and the divided portions 2A and 2B are individually reduced in diameter by bolts 26.

The rod washer 24 is formed with a flat seat (not shown) for fixing the head 26b of the bolt 26, and the head 26b is brought into contact with this seat to prevent the bolt 26 from rotating relative to the rod washer 24. It prevents loosening after tightening so that a strong joint can be maintained. Here, when the seat is formed, there is a possibility that the rod diameter of the rod-shaped washer 24 is reduced, and the rigidity of the entire rod may be weakened. The rigidity of the slit one side type is increased. Therefore, it is effective in a place where the required degree of rigidity is high, and joining is possible while exhibiting strong bending stress. On the other hand, the rod-shaped nut 25 can be individually tightened at each end portion of the housing 2 by being provided in a divided structure.
Further, the head portion 26b of the bolt 26 is disposed on the movable region side of a lever handle (not shown).

  The slide plate 22 is formed in a substantially arc shape by bending a thin plate-like member, and is arranged at two locations between the outer peripheral surface of the sealing sleeve 3 in the vicinity of both ends of the housing 2 in the circumferential direction. It is provided at a position corresponding to the radial joint portions 18, 18. An edge portion on the pipe P insertion side of the slide plate 22 is bent into an inclined taper shape so as to overlap the conical surface 20a of the triangular ring 20 to form a bent portion 22a. The slide plate 22 is provided so that the pipe P can be inserted while sliding along the inner periphery of the housing 1, thereby covering the opening 2 a that is a notch portion of the housing 1.

The slide plate 22 is provided with high strength considering that the valve body 1 is repeatedly tightened and fixed, and is preferably provided as follows. 1. The thickness is such that the slide plate does not deform (for example, 0.5 mm or more). 2. Strength is secured by bending both sides of the slide plate. 3. A reinforcing member is affixed to a location where deformation of the bolt tightening portion is likely to occur.
Further, a part of the slide plate 22 may be fixed by welding in the housing 2, and in this case, the slide plate 22 can be prevented from being displaced.

  The lock mechanism 35 having the lock ring 19, the triangular ring 20, and the holding ring 21 is housed and held at the inner peripheral position of the reduced diameter joint portion 18, and the reduced diameter joint portion 18 is tightened by the lock mechanism 35. The pipe P is provided so that it can be prevented from coming off when the bolt 26 is tightened. These are respectively arranged on both end sides of the sealing sleeve 3 accommodated in the housing 2.

  A part of the lock ring 19 is notched in a slit shape and is formed in an annular shape, and a plurality of claw portions 19a are provided at the inner tip. When the diameter of the housing 2 is reduced, the lock ring 19 is reduced in diameter, and the claw portion 19a bites into the joint outer peripheral surface portion of the pipe P, thereby preventing the pipe P from coming out. In addition, when the diameter of the housing 2 is increased, the sealing sleeve 3 is pressure-bonded to the outer peripheral surface portion of the pipe P so as to hermetically seal with the pipe P.

  The triangular ring 20 is formed in a ring shape with a part cut out in a slit shape, and is provided so that the diameter can be reduced. The triangular ring 20 has a triangular shape with an apex portion inward, and has a function of supporting the conical surfaces 20a and 20a when the sealing sleeve 3 side and the lock ring 19 are engaged with each other. is working.

  The holding ring 21 is formed in an annular shape having slit-like portions like the triangular ring 20 so as to be capable of reducing the diameter. The holding ring 21 is formed in a circular cross section, and the lock ring 19 is held by disposing the holding ring 21 between the flange portion 5 and the lock ring 19 so that the outer peripheral surface side is in contact with the flange portion 5.

In the valve mechanism 4, a frame body 10 is integrally fixed inside the divided portion 2 </ b> C of the housing 2, a sealing sleeve 3 is mounted inside the frame body 10, and the valve body is rotatably mounted in the sealing sleeve 3. Configured. The valve mechanism 4 is provided so that the flow path can be opened and closed (90 ° open / close or intermediate open / close).
The frame body 10 is formed in an annular shape so as to be attachable to the inside of the divided portion 2 </ b> C, and a locking groove 10 a for locking the contact sleeve 3 is formed on the outer peripheral edge of the frame body 10.

The valve body 11 is made of, for example, a metal material such as stainless steel, and is formed by means such as casting, forging, or pressing. The valve body 11 may be other than a metal material, and an appropriate material can be selected according to the implementation. Further, the valve body 11 may be covered with a sealing material (not shown) or provided with a sealing material on the annular outer peripheral surface. Also good.
The valve body 11 has an insertion portion 11a for fitting and fixing a stem 12 composed of an upper stem 12a and a lower stem 12b in the diameter direction, and the upper stem 12a and the lower stem 12b are fitted to the insertion portions 11a and 11a, respectively. is doing. Thereby, the valve body 11 can be rotated in the contact sleeve 3 in accordance with the rotation operation of the upper stem 12a. The valve body 11 has a seal surface 11b on the outer peripheral side, and this seal surface 11b is slightly larger in diameter than the seal surface 3f so as to bite the seal surface 3f formed to project from the seal sleeve 3 when the valve is closed. It is provided in a shape, and the gap at the time of valve closing seal is closed to prevent the leakage of fluid.

  A lever handle can be attached to the outer end of the stem 12, and the valve mechanism 4 can be opened / closed or controlled by the lever handle. When a lever handle is provided, a stopper (not shown) may be attached to the valve body 1, and the rotation of the lever handle may be regulated by this stopper.

  3 and 4, the sealing sleeve 3 is a rubber sleeve of an internal pressure sealing type, and is formed in a long cylindrical shape by extending the end side to the position of the divided portions 2A and 2B. Thereby, when the contact sleeve 3 is mounted in the frame body 10, the reduced diameter joint portion 18 can be formed in the divided portions 2A and 2B while the valve mechanism 4 is formed in the divided portion 2C. Thus, the sealing sleeve 3 has a structure that is advantageous for leakage to the outside without requiring an extra sealing function by integrating two functions (valve function and joint function). . The sealing sleeve 3 is attached to the inner peripheral surface side of the housing 2 with the slide plates 22 interposed on both sides.

  Both end portions of the sealing sleeve 3 have a lip portion 3a bent inward, and an annular groove 3b formed in a bent portion of the lip portion 3a. An annular spring 8 is attached to the annular groove 3b. ing. The inner circumferential shape of the sealing sleeve 3 is formed in a flat shape, and the outer circumferential surface is provided with annular grooves 3c and 3c for positioning when the frame body 10 is mounted, and an annular fitting for fitting the bearing 34 therein. Joint grooves 3d and 3d are formed.

When the lip portion 3a is reduced in diameter to be smaller than the diameter of the pipe P, 1. It becomes difficult to insert the piping P at the time of joining. 2. Even if it can be inserted, the end portion of the pipe P may damage the lip portion 3a, which leads to leakage from the joint portion. 3. Since problems such as the inability to insert the pipe P may occur, it is necessary to provide a shape that does not cause these problems.
Further, the lip portion 3 a needs to be prevented from being deformed when the valve mechanism 4 is provided, but the sealing sleeve 3 in the present embodiment is on the inner peripheral side with respect to the frame body 10 that fixes the valve mechanism 4. When the valve mechanism 4 is fixed, the lip portion 3a is not affected to reduce the diameter.

  In the vicinity of the center of the sealing sleeve 3, a facing surface 3e is provided on which the joining end faces of the pipe P inserted from both sides of the housing 2 are located, and the pipe P is joined with a gap from the facing surface 3e. Since the fluid flowing in the pipe P flows out from the gap between the facing surface 3e and the pipe P, and this fluid flows to the annular groove 3b side and exerts a force to spread the lip portion 3a, the lip portion 3a The inner peripheral surface side comes into strong contact with the outer peripheral surface of the pipe P, so that the sealing performance can be improved. Further, even when the processed state of the joint end face of the pipe P is poor and burrs or the like remain, the contact sleeve 3 is not damaged by this gap.

By the way, especially in the closed state of the valve, the contact amount between the valve body 11 and the sealing sleeve 3 is increased, and the sealing sleeve 3 is liable to be kinked. When kinking occurs in the sealing sleeve 3, the kinking may cause a deterioration in valve functions such as sealing performance and durability.
For this reason, the sealing sleeve 3 is formed with an annular convex portion 3g projectingly formed on the outer peripheral end face side in the vicinity of the valve body 11 mounting portion, and this convex portion 3g is formed in a locking groove 10a formed in the frame body 10. By fitting and further reducing the diameter of the reduced diameter joint portion 18, the slide plate 22 and the housing 2 are tightened from the outer periphery. Thereby, it can fix firmly with respect to the frame 10 at the time of piping, and it becomes possible to prevent this sealing sleeve 3 from being twisted or moved by opening and closing of the valve body 11. Although not shown, the outer peripheral side of the sealing sleeve is formed in a corrugated shape, and the corrugated portion is fitted into the corrugated portion formed in the housing, thereby preventing the sealing sleeve from being twisted.

  In this case, in the manufacturing stage, when the inter-surface dimension of the frame 10 can be sufficiently secured, the convex portion 3g is provided over the entire circumference of the contact sleeve 3 as shown in FIG. On the other hand, when the sufficient face-to-face dimension of the frame 10 cannot be secured, and particularly when it is difficult to secure the thickness in the vicinity of mounting the upper and lower stems 12a, 12b, the convex portion of the sealing sleeve 3 'as shown in FIG. What is necessary is just to arrange | position 3g 'partially with respect to an outer periphery. In particular, in the portion where the valve is closed, the contact amount of the valve body 11 is increased, so that a large amount of this convex portion 3g ′ is arranged in the vicinity of the horizontal sectional portion in the drawing. Thereby, the sealing sleeve 3 can be prevented from being kinked, and the sealing performance can be ensured even when the valve body 11 is opened and closed and when it is turned.

  The convex portion 3g can be formed in an arbitrary size, but the formation position is such that when the slide plate 22 is attached to the housing 2, the slide plate 22 is completely covered. Like that. Thereby, when the joining of the piping P is completed, the slide plate 22 covers the outer peripheral side of the convex portion 3g, and the sealing sleeve 3 can be reliably fixed at the time of piping. Therefore, the slide plate 22 is formed so that the end portion protrudes from the position of the convex portion of the sealing sleeve 3 to the frame body 10 side, and is extended to a position where the frame body 10 can cover the outer peripheral side. By doing so, it is possible to prevent a part of the sealing sleeve 3 from protruding from the slit 40 when the bolt 26 is tightened.

  Although not shown, a ring-shaped member capable of reducing the diameter may be mounted between the slide plate 22 and the sealing sleeve 3 in order to hold the sealing sleeve 3 strongly. In this case, the tightening amount by the convex portion 3g can be further increased. As this ring-shaped member, for example, a triangular ring having a triangular cross section can be used, and the taper shape of the triangular ring generates a tightening pressure in the inter-surface direction to firmly fix the sealing sleeve 3. It becomes possible. Further, a concave groove shown in FIG. 5B for mounting the triangular ring may be provided on the sealing sleeve 3 side. When this concave groove is provided, the valve function portion and the joint of the sealing sleeve 3 are provided. Propagation of deformation when the functional part is reduced in diameter can also be prevented.

The diameter-reduced joint portion 18 is in a state where the diameter is larger than the diameter of the housing 2 before the piping because of piping to match the valve body diameter. On the other hand, the sealing sleeve 3 is integrally provided in a region extending over the fixed side divided portion 2C having the valve mechanism 4 and the enlarged diameter reducing side divided portion 2B having the reduced diameter joint portion 18 to ensure the sealing performance.
That is, if the distance L from the end of the lip portion 3a to the valve mechanism 4 is short, the deformation of the sealing sleeve 3 is propagated to the valve mechanism 4 due to the diameter reducing operation of the diameter reducing joint portion 18, and the valve is activated. The amount of contact with the valve body 11 may increase, and the operating torque may increase unnecessarily. Unlike a known technique in which the entire joint performs a diameter reduction operation such as a coupling joint, prevention of the diameter reduction deformation of the sealing sleeve 3 in the fixed-side divided portion 2C is extremely important.
In this embodiment, as shown in FIG. 4, the distance L of the sealing sleeve 3 secures a sufficient separation distance so as to prevent the deformation of the sealing sleeve 3 from propagating when the diameter reducing joint portion 18 is reduced in diameter. Since the distance L is a non-propagating part, it is possible to prevent the deformation of the sealing sleeve 3 due to the diameter reducing operation from propagating to the valve mechanism 4.

5 (a) and 5 (b) show an enlarged end portion before the sealing sleeve 3 is mounted on the housing 2. In the drawing, the two-dot chain line indicates a reduced diameter joint portion. 18 shows a state in which the diameter is reduced.
In this embodiment, as shown in the figure, a portion corresponding to the reduced diameter joint portion 18 of the sealing sleeve 3 is formed in an enlarged shape and mounted in the housing 2. Therefore, the sealing performance is ensured while responding to the diameter reducing operation of the diameter reducing joint portion 18 by its elastic force.

  However, when a sufficient distance L cannot be ensured due to the reason that the face-to-face dimension of the valve has to be shortened, the connecting portion between the valve mechanism 4 and the reduced diameter joint portion 18 is as shown in FIG. By connecting with the gentle taper portion 3h having the same thickness as these, it is possible to easily adapt to the diameter reducing operation of the diameter reducing joint portion 18.

  Further, by providing the wedge-shaped groove 3i as a non-propagating portion in the vicinity of the tapered portion 3h as shown in FIGS. 5A and 5B, when the diameter reducing operation is performed, the sealing sleeve 3 is contracted. A corresponding portion of the diameter joint portion 18 is bent with the front end side of the wedge-shaped groove 3i as a base point, and the diameter of this portion can be reduced more uniformly. FIG. 5A shows a wedge-shaped groove 3 i provided on the inner peripheral side of the sealing sleeve 3, while FIG. 5B shows a wedge-shaped groove 3 i provided on the outer peripheral side of the sealing sleeve 3. is there. In addition, the wedge-shaped groove 3i can exhibit its function if an arbitrary number is provided, and can also exhibit the same function by forming the connecting portion in a bellows shape.

  Further, when pipes are connected, that is, when the diameter-reduced joint portion 18 is reduced in diameter, the center of the flow path in the valve mechanism 4 (valve element 11) and the same center of the diameter-reduced joint portion 18 (the lip portion 3a of the sealing sleeve 3). As a result, the piping function by the valve is achieved. For this reason, in the housing 2, the center in the flow path direction of the reduced diameter joint portion 18 before the diameter reduction and the same center of the valve function 4 are arranged in a state of being displaced to the gap side at both circumferential ends of the housing 2. . Considering this amount of displacement, the wedge-shaped groove 3i may be provided in a state displaced in the circumferential direction. Thereby, when the diameter of the reduced diameter joint portion 18 is reduced and the center of the lip portion 3a of the sealing sleeve 3 coincides with the center of the valve body 11, the lip portion 3a of the sealing sleeve 3 is further reduced in diameter and brought into close contact. Can do.

Here, the frame 10 in the valve mechanism 4 has upper and lower portions fixed by upper and lower fixing portions 31 and 32, and both side portions in the flow path direction are fixed by welding fixing portions 33.
The upper fixing portion 31 is provided so that the upper portion of the frame body 10 can be fixed to the housing 2, and a concave portion 31 b is formed along the outer peripheral shape of the housing 2 on the attachment side to the housing 2, thereby seating the housing 2 It can be installed without providing. Further, a hole 31c is formed in the upper fixing portion 31, and a bearing 34 is attached to the hole 31c through an O-ring 31d, and the bearing 34 is attached to the attachment hole 2f of the housing 2 so that the frame The upper part of the body 10 is attached to the bearing 34 via the upper stem 12a.
An extension body 50 may be attached above the upper fixing portion 31 as shown in FIG. The extended body 50 can be fixed to the upper fixing portion 31 with, for example, a bolt 51 and integrated with the housing 2, and the extended body 50 allows the valve body 1 to be formed in a long neck shape.

The lower fixing portion 32 is provided so that the lower portion of the frame body 10 can be fixed to the housing 2. The lower fixing portion 32 includes a concave portion 32b having the same shape as the upper fixing portion 31, and the divided portions 2C and 2C can be attached to the outside when the end portions are brought into contact with each other. Can be attached without forming a seat. After the lower fixing portion 32 is fixed, the cutout portions 2C ₁ and 2C ₁ of the divided portion 2C are combined to form a substantially circular mounting hole 2g. A hole 32c is formed in the lower fixing portion 32 in the same manner as the upper fixing portion 31, and a bearing 34 is attached to the hole 32c via an O-ring 32d, and the bearing 34 is attached to the mounting hole 2g of the housing 2. Is attached to the bearing 34 via the lower stem 12b.

  In FIG. 2, the upper fixing portion 31 and the lower fixing portion 32 are integrally fixed to the housing 2 by welding. However, as shown in FIG. 8, female screws 2 d and 2 e are provided at the upper and lower positions of the housing 2. The upper fixing portion 36 and the lower fixing portion 37 may be screwed to the female screws 2d and 2e with the bolts 38 through the through holes 36a and 37a.

  The weld fixing portion 33 is obtained by welding and fixing both side portions of the frame body 10 along the inner periphery of the housing 2. As a means for stopping the welding, in this embodiment, resistance such as spot welding or projection welding is used. Welding is used. At this time, since the housing 2, the frame body 10, and the upper and lower side fixing portions 31 and 32 are made of metal, they can be integrated more firmly by fixing them by welding, thereby improving the valve function. it can.

Further, unlike the reduced diameter joint portion 18, the valve mechanism 4 is independently fixed by the fixing portions 31, 32, and 33, and therefore the slit 40 is provided in either or both ends of the housing 2. However, it can be provided at an arbitrary position with respect to the circumferential direction of the valve body 1.
In addition, by providing the valve mechanism 4 in the above-described structure in the valve body 1, it is possible to divert parts of a general wafer type butterfly valve, which is advantageous in terms of cost.

  Next, the case where the pipe P is joined to the above valve will be described. When a pipe P (including a metal such as a steel pipe or a resin pipe) is inserted from both sides of the valve body 1, the front end surface of the pipe P is positioned near the facing surface 3 e of the sealing sleeve 3. Therefore, the pipe P can be easily set at an appropriate position. When the facing surface 3e is not provided, the joining position on the pipe outer peripheral surface may be marked and the appropriate position may be determined by visual recognition.

  When the housing 2 is tightened via the bolt tightening mechanism 23 after the pipe P is inserted, the reduced diameter joint portion 18 gradually approaches. As the diameter of the housing 2 decreases, the lock ring 19 gradually rises, and the claw portion 19a of the lock ring 19 bites into the joint outer peripheral surface of the pipe P deeply.

  The reduced diameter joint portion 18 is divided by the dividing mechanism 40 from the fixing function of the fixing portions 31, 32, 33 fixing the valve mechanism 4 so as to expand and contract the diameter. The pipe P can be watertightly fixed by expanding and contracting the diameter. At this time, since the reduced diameter joint portion 18 is expanded and contracted by the bolt tightening mechanism 23, the valve mechanism 4 is not affected, and the valve mechanism 4 can be maintained in a firmly fixed state. Further, when one of the bolts 26 is loosened, the reduced diameter joint 18 on the other side is not loosened, and the sealing performance when the pipe P is individually joined to the reduced diameter joint 18 is reliably maintained. be able to.

  At this time, since the valve mechanism 4 is fixed by the upper upper fixing portion 31 and the lower lower fixing portion 32, the rotation shaft (not shown) of the valve body 11 does not tilt in the flow path direction. In addition, since both side portions of the valve mechanism 4 are fixed by the weld fixing portion 33, the frame body 10 can be prevented from attempting to rotate around the rotation axis of the valve body 11, thereby the valve mechanism. 4 can be prevented from tilting. Since the frame body 10 is fixed by these fixing portions 31, 32, 33, the valve mechanism 4 can be mounted in the valve body 1 independently from the reduced diameter joint portion 18. Thereby, the valve mechanism 4 can rotate the valve body 11 without being influenced by the diameter reducing operation of the diameter reducing joint portion 18 to enhance the functionality as a valve.

  Moreover, in the valve mechanism 4, the valve body 11 is held by the two stems of the upper stem 12a and the lower stem 12b. For example, even when the valve body 11 receives fluid pressure in the closed state, The valve function can be sufficiently maintained against this fluid pressure, and the strength and sealing performance of the valve function part can be improved.

Therefore, for example, even when another pipe P is joined to the reduced diameter joint portion 18 on the other side after the pipe P is joined to the reduced diameter joint portion 18 on the one side of the valve body 1, leakage is prevented. It is possible to easily increase the number of pipes P by joining, and the function as a valve can be greatly improved.
Moreover, since the valve body 11 is made of metal and the sealing sleeve 3 is made of rubber, the capacity of the sealing sleeve 3 serving as a seal portion can be increased to ensure sufficient sealing performance, and the valve body 1 has a large diameter. Can be formed. Furthermore, it is possible to cope with a small-diameter valve, and in any case, leakage can be prevented and high sealing performance can be exhibited.

  Further, since the dividing mechanism 40 is a slit formed at a predetermined length along the circumferential direction of the housing 2 at a position near the frame 10 to be fixed, it can be easily formed. The function of the reduced diameter joint portion 18 can be reliably divided.

  As described above, the pipe P is not piped after joining, or there is no fear of water leakage, and an excellent sealed joining state is realized. Furthermore, even when a pulling force is applied to the pipe P, there is no fear of pipe removal and the like, and it can withstand long-term use with extremely high bonding strength. The sealing sleeve 3 is pressure-bonded to the joint outer peripheral surface of the pipe P. That is, the lip portion 3 a of the sealing sleeve 3 is formed by the diameter reduction force of the housing 2, the self-tightening force of the fluid pressure, and the centripetal force of the spring 8. The outer peripheral surfaces of both ends have a sealing property and moderate flexibility (specific examples: flexible square piece side ± 2 °, both sides 4 °) and are crimped to form an extremely excellent sealing structure.

  After the pipe P is joined, the flow path in the housing 2 can be opened and closed and the flow rate can be controlled. As described above, since the internal pressure sealing type sealing sleeve 3 is employed, a sealing structure using the pressure of the fluid flowing in the pipe P is formed. Thereby, when the sealing sleeve 3 tries to expand the diameter in order to leak the fluid from the butt portion of the pipe P, the self-tightening force works and the sealing performance can be further improved. If the valve body 1 of the present invention is installed in various pipes, it is possible to design a pipe according to the purpose of use and installation conditions without securing a wide space, and, as in the prior art, a joint and a valve Because there is no need to prepare and separately, there is no cost. Moreover, compared with the past, as a result of greatly reducing the number of connection points, the burden on the operator is reduced, and workability can be dramatically improved. By simplifying the configuration of the piping equipment, maintenance inspection and parts replacement can be easily performed.

Even if the pipe P is a pipe having the same diameter according to the standard, a dimensional error may occur, or an error may occur due to a difference in material such as resin or metal. However, when the bolt 26 is tightened, the sealing sleeve 3 is used. This error can be absorbed, and the pipe P can be joined firmly.
Furthermore, by changing the size and thickness of the inner diameter of the lip portion 3a of the sealing sleeve 3 in advance, different diameter pipes having different nominal diameters can be joined to both end sides of the valve body, so that a so-called reducer function is exhibited. Can do.

10 and 11 show a second embodiment of a valve having a reduced diameter joint portion of the present invention. In the following embodiments, the same parts as those of the above-described embodiments are denoted by the same reference numerals, and the description thereof is omitted.
The sealing sleeve 3 of the valve described above is inserted in a state compressed and reduced in the inter-surface direction and the inner diameter direction by the housing 2, the slide plate 22, the lock ring 19, and the triangular ring 20. Further, as described above, the center O ′ in the flow path direction of the reduced diameter joint portion 18 before the diameter reduction and the same center O of the valve mechanism 4 are displaced to the gap side at both ends in the circumferential direction of the housing 2. Therefore, the compression / reduction of the sealing sleeve 3 is greatest on the side opposite to the gaps at both ends in the circumferential direction of the housing 2. For this reason, if the diameter of the housing 2 is insufficient, the inner diameter of the sealing sleeve 3 may be smaller than the outer diameter of the pipe P.

  With this structure, in the valve of the first embodiment, it may be difficult to insert the pipe P if the diameter expansion state of the reduced diameter joint portion 18 when the pipe P is not inserted is insufficient. As a countermeasure, it is conceivable to increase the face-to-face dimension in the housing 2 and reduce the face-to-face dimension of the sealing sleeve 3 to suppress the diameter reduction of the sealing sleeve 3, but when the compression amount of the sealing sleeve 3 decreases. This is not preferable because the sealing performance of the reduced diameter joint portion 18 is reduced.

  For this reason, in the second embodiment, the slit 61, from the start point Q to a position where the predetermined angle θ with respect to the center O of the housing 60 is at least 90 ° or more from the intermediate point Q of both ends in the circumferential direction of the housing 60, 61 is formed (hereinafter, the size of the slit 61 formed at a predetermined angle θ from the starting point Q will be referred to as a slit depth). By increasing the slit depth in this way, the diameter of the housing 60 is ensured, and piping (not shown) can be reliably inserted. In this case, if the slit depth is too deep, the pressure resistance performance of the housing 60 may be lowered. In this embodiment, the slit depth is set to 125 ° or 135 °.

  In addition, the slit 61 may cause a reduction in the strength of the housing 60, and this strength reduction becomes remarkable particularly in the inter-surface direction of the housing 60. That is, when an internal pressure load exceeding an allowable value is generated in the valve, an opening occurs between the expansion / contraction diameter side split portions 60A and 60B and the fixed side split portion 60C of the housing 60 through the slit 61, and the housing 60 There is a possibility of deformation in the opening direction.

  As a countermeasure, in this valve, the end portions of the left and right divided portions 60A and 60B of the housing 60 are connected to each other by a connecting portion 62, and the strength of the housing 60 is improved in the inter-plane direction by the connecting portion 62. The connecting portion 62 is formed integrally with the housing 60, and is formed so as to bridge the folded portions of the divided portions 60A and 60C so as to straddle the divided portion 60C. At this time, since the connecting portion 62 is integrally formed with the housing 60, the housing 60 can be configured by using the portion discarded for cutting out the material when forming the divided portions 60A, 60B, and 60C. As a result, man-hours can be reduced, and the yield can be improved. Further, the folded portion of the connecting portion 62 is lengthened at the time of bending, and a part thereof is joined so as to be deformed along the outer peripheral arc-shaped portion of the housing 60, whereby the strength of the housing 60 is increased not only in the inter-surface direction but also in the diameter. It is possible to further improve the direction.

  12 and 13 show a third embodiment of a valve having a reduced diameter joint portion of the present invention. In this embodiment, the housing 70 and the connecting portion 72 are provided separately, and the connecting portion 72 connects the end portions of the expansion / contraction diameter side split portions 70A and 70B so as to straddle the fixed side split portion 70C. . Thus, the connecting portion 72 can be provided separately from the housing 70.

  The connecting portion 72 is a flat reinforcing plate, and is provided with a length that can be fixed to the housing 70 in a state where the divided portions 70A and 70B are bridged through the slit 71. The reinforcing plate 72 is provided with a through hole 73, while the split portions 70 </ b> A and 70 </ b> B of the housing 70 are provided with female screws 74. When attaching the reinforcing plate 72, first, after constructing the piping, the through hole 73 of the reinforcing plate 72 is aligned with the female screw 74, and the bolt 75 is screwed into the female screw 74 through the through hole 73. Thereby, the division | segmentation part 70A and 70B can be connected with the reinforcement board 72. FIG. The thickness of the reinforcing plate 72 (not shown) and the dimensions of the bolts 75 can be changed as appropriate. By increasing these dimensions, the breaking strength of the housing 70 can be further improved. Further, the reinforcing plate 72 may be formed in a substantially arc shape so as to follow the outer peripheral shape of the housing 70 as in the second embodiment.

  14 and 15 show a fourth embodiment of a valve having a reduced diameter joint portion of the present invention. In this embodiment, the housing 80 is mounted in a state in which the rotation center axis R of the valve mechanism and the housing center axis S are offset by an angle of 90 °, and one side of the valve is located at the mounting position of the reinforcing plate 82. ing. In this valve, the reinforcing plate 82 can be disposed on one side of the housing 80 with the rotation center axis R as the center, and the workability can be improved because the reinforcing plate 82 can be attached from one side of the housing 80 during operation. Can be made. Further, since the position of the tightening bolt 26 can be disposed on one side of the housing 80 similarly to the reinforcing plate 82, the tightening operation is simple. Furthermore, the mounting position of the lever handle is maintained on the upper side of the housing 80, and the movable range of the lever handle is arranged on the same side as the reinforcing plate 82 and the tightening bolt 26, so that maintenance and the like are advantageous. It is.

  As in the third embodiment, the reinforcing plate 82 is attached by connecting the end portions of the expansion / contraction diameter end portion side split portions 80A and 80B of the housing 80 so as to straddle the fixed side split portion 80C. This prevents the slit 81 from opening the housing 80 in the direction between the surfaces.

  16 and 17 show a fifth embodiment of a valve having a reduced diameter joint portion of the present invention. In this embodiment, spacers 92 are provided in the gaps G at both ends in the circumferential direction of the housing 90, and the spacers 92 are fixed by the fastening bolts 26 so that the spacers 92 extend over the fixed-side divided portion 90C. The side division parts 90A and 90B are connected.

The spacer 92 is made of a metal plate, and the length D of the spacer 92 is substantially the same as the inter-surface dimension (not shown) of the housing 90, and the width W is the housing 90 after the tightening bolt 26 is tightened. Is formed to have a length shorter than the width (opening width) X of the gap at both ends in the circumferential direction.
That is, if the width W of the spacer 92 is equal to the width X of the opening, the spacer 92 can be used for confirming the tightening position by tightening the tightening bolt 26 until it contacts the spacer 92. However, when performing one-side piping, if the one-side tightening bolt 26 is loosened when the one-side tightening bolt 26 is loosened, the spacer 92 is restrained by both ends of the housing 90 in the circumferential direction. It becomes a state. At this time, if the spacer 92 does not move, the diameter on the side where the tightening bolt 26 is loosened cannot be expanded. Therefore, by providing the width W smaller than the width X of the opening, the spacer 92 can move even when the one side tightening bolt 26 is removed and the other side tightening bolt 26 is tightened. It has become.

  In addition, this valve is also arranged by offsetting the rotation center axis T of the valve mechanism and the center axis U of the housing 90 by a predetermined angle in the circumferential direction. With this structure, the positions of the spacer 92 and the fixed portion side divided portion 90C in the circumferential direction are shifted, and the spacer 92 does not interfere with the lower fixed portion 32 disposed in the fixed portion side divided portion 90C.

  In addition, this valve is configured such that the angles α forming the slits 91 are equal, and the slits 91 are provided symmetrically with respect to the housing central axis U. Here, if the slits are arranged symmetrically with respect to the rotation center axis T while the rotation center axis T and the housing center axis U are offset, the slits are formed from both ends of the housing 90 in the circumferential direction. The depth of the left and right will be different. Thus, when the slit depth is different, the pressure receiving amount at the time of internal pressure load is different, and this internal pressure is concentrated and applied to the side where the slit depth is deeply formed. However, since the valve of this embodiment is provided with the slits 91 so that the slit depth is uniform, the pressure receiving amount can be averaged and the concentration of force on the slits 91 on one side is prevented.

  In addition, in the case of this embodiment, one-side piping is possible, but the strength of the housing 90 is insufficient compared to the second to fourth embodiments, but the dimension of the folded portion of the housing 90 is increased, The housing strength can be improved by increasing the dimensions of the tightening bolt 26, the rod washer 24, and the rod nut 25 to increase the rigidity.

  In addition to the embodiment described above, the reduced diameter joint portion can be provided only on one side of the valve body and the other side can be provided in another connection method, and any connection method can be adopted. Further, the valve in the present invention can be applied to, for example, a repair valve or a hinge-type valve in addition to the housing-shaped valve having the reduced diameter joint portion as described above. By forming a slit in the hinge type valve housing, the fixing function of the valve mechanism and the expansion / contraction diameter function of the diameter reduction joint portion can be divided, and the same effects as described above can be exhibited.

  Since the valve having the reduced diameter joint portion of the present invention can be used for joining various pipes such as steel pipes, lining steel pipes, stainless steel pipes, and vinyl chloride pipes, for example, air conditioning hot / cold water piping and cooling water piping of building air conditioning equipment , Cold / hot water pipes for air conditioning facilities in chemical factories, cooling water pipes and slaked lime blowing pipes in cleaning factories, diffuser pipes in waste treatment facilities, incinerator cooling water pipes in waste incineration plants, piping around filtration equipment in water treatment plants, Water supply temporary piping, water supply bridge installation piping, underground water supply pipes for water supply facilities, railway snow extinguishing pipes, subway fire extinguishing pipes, subway fire extinguishing pipes connected water supply pipes, railroad panel circulation snow melting pipes, hot water circulation snow melting pipes and snow extinguishing pipes for road equipment It can be used for various pipes such as stadium sprinkling pipes and curved pipes.

  The present invention can provide piping equipment to be mounted on piping such as strainers, check valves, pressure gauges, flow meters, etc. in addition to valves in a housing that can be reduced in diameter. Of course, it can be widely applied to technology.

1 is a partially cutaway front view showing a first embodiment of a valve having a reduced diameter joint portion according to the present invention. It is a disassembled perspective view of the valve | bulb of FIG. It is sectional drawing which showed 1st Embodiment of the valve | bulb which has a reduced diameter coupling part in this invention. It is a cross-sectional view of FIG. It is the principal part enlarged view which showed the diameter reduction side vicinity of the sealing sleeve. It is the perspective view which showed the housing in FIG. It is the perspective view which showed the other example of the housing in 1st Embodiment. It is the disassembled perspective view which showed the other example of the fixing | fixed part in 1st Embodiment. It is the perspective view which showed the other example of the frame and sealing sleeve in 1st Embodiment. It is the front view which showed 2nd Embodiment of the valve | bulb which has a reduced diameter coupling part in this invention. It is a side view of FIG. It is the front view which showed 3rd Embodiment of the valve | bulb which has a reduced diameter coupling part in this invention. It is a side view of FIG. It is the side view which showed 4th Embodiment of the valve | bulb which has a reduced diameter coupling part in this invention. It is a front view of FIG. It is the side view which showed 5th Embodiment of the valve | bulb which has a reduced diameter coupling part in this invention. FIG. 17 is a front view of FIG. 16. It is the front view which showed the general example of joining of piping and a valve | bulb.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Valve body 2 Housing 2a Opening part 3 Sealing sleeve 4 Valve mechanism 10 Frame body 10a Locking groove 11 Valve body 18 Reduced diameter joint part 22 Slide plate 23 Bolt tightening mechanism 31 Upper fixing part 32 Lower fixing part 33 Welding fixing part 35 Locking mechanism 40 Slit (dividing mechanism)
P piping

Claims (14)

  The housing is divided by a dividing mechanism to form a fixed-side divided portion and an enlarged / reduced-diameter-side divided portion, and an annular frame is integrally fixed inside the fixed-side divided portion, and a sealing sleeve is attached to the inside of the frame The valve body is rotatably mounted in the sealing sleeve to provide a valve mechanism in the housing, and the end side of the sealing sleeve is extended to the expansion / contraction diameter side division portion. A valve having a reduced-diameter joint portion, characterized in that a reduced-diameter joint portion is provided that joins pipes by expanding or reducing one or both of the diameters.   2. The contraction according to claim 1, wherein the upper and lower parts of the frame body are fixed to the housing via an upper and lower stem that rotates the valve body, and both side portions in a flow path direction are fixed to the housing by welding. A valve with a diameter joint.   The valve having a reduced diameter joint portion according to claim 1 or 2, wherein the dividing mechanism is a slit having a predetermined length formed along a circumferential direction of the housing at a position near the frame body.   The said slit is a valve | bulb which has a reduced diameter coupling part of Claim 3 formed along the circumferential direction in the one or both of the circumferential direction both ends of the said housing.   5. The valve having a reduced diameter joint portion according to claim 4, wherein the slit is formed from an intermediate point between both ends of the housing in the circumferential direction as a starting point to a position at which an angle with respect to the center of the housing is at least 90 ° or more. .   The valve having a reduced diameter joint portion according to claim 5, wherein the end portion side of the expanded / reduced diameter side divided portion is connected by a connecting portion in a state of straddling the fixed side divided portion.   The valve having a reduced-diameter joint according to claim 6, wherein the connecting portion is provided integrally with or separately from the housing.   The spacer which can be fixed using the fastening bolt which expands and contracts the said diameter reduction joint part in the clearance gap between the circumferential direction both ends of the said housing is arrange | positioned, The said expansion / contraction diameter side division | segmentation part was connected by this spacer. A valve having the reduced-diameter joint described in 1.   The rotation center axis of the valve mechanism and the center axis of the housing are arranged so as to be offset in the circumferential direction, and the slit is provided symmetrically with respect to the housing center axis. A valve having the reduced diameter joint portion according to claim 1.   The valve having a reduced diameter joint portion according to any one of claims 1 to 9, wherein a locking groove for locking the sealing sleeve is formed on an outer peripheral edge of the frame body.   The diameter-reduced joint portion according to any one of claims 1 to 10, wherein openings at both ends in the circumferential direction of the housing are provided so as to be able to expand and contract by a bolt fastening mechanism, and lock mechanisms are provided at inner ends of both ends of the housing. Having a valve.   The valve having a reduced diameter joint portion according to any one of claims 1 to 11, wherein a slide plate is provided in the vicinity of both ends in the circumferential direction of the housing and between the outer peripheral surface of the sealing sleeve.   A housing is divided into a fixed-side divided portion and an enlarged / reduced diameter-side divided portion, a valve body is rotatably mounted on the fixed-side divided portion, a valve mechanism is provided in the housing, and the expanded / reduced-diameter side divided portion is provided. Is provided with a reduced diameter joint part for expanding and reducing the diameter and joining the pipe, and a sealing sleeve integrally formed so as to extend from the seal part of the valve body to the seal part of the reduced diameter joint is mounted in the housing. A valve having a reduced diameter joint portion, wherein the sealing sleeve has a sealing function of the reduced diameter joint portion and a sealing function of the valve mechanism.   A taper portion for preventing the deformation from propagating to the valve mechanism when the diameter-reducing joint portion is reduced in diameter at a portion connecting the sealing function of the reduced-diameter joint portion and the sealing function of the valve mechanism in the sealing sleeve The valve having a reduced diameter joint portion according to claim 13, wherein a non-propagating portion such as a wedge-shaped groove is provided.

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