JP2020139582A - Joint structure - Google Patents

Abstract

To facilitate the operation of connecting and disconnecting tubular members.SOLUTION: A joint structure 100 is configured such that a first tubular member and a second tubular member are connected directly or via another member, in which a first flange part 112 is formed on the side of the first tubular member at the place where the connection is made; a second flange part 122 is formed on the side of the second tubular member; the first flange part 112 and the second flange part 122 are provided with a ferrule shape; a ferrule clamp 130 that constitutes a ferrule joint structure together with the first flange part 112 and the second flange part 122 is further provided; and glass lining is applied to one or both of the first tubular member and the second tubular member.SELECTED DRAWING: Figure 2a

Description

The present invention relates to a joint structure, and more particularly, a joint structure in which a first tubular member and a second tubular member are directly connected or via another member.

Conventionally, when connecting two pipes, brazing the pipes to connect them in a state where they cannot be easily separated, or forming a joint structure with flanges to facilitate separation and connection. It has been adopted.
A typical conventional joint structure is constructed so that, for example, pipes provided with flanges at the ends are bolted to each other using through holes provided in the flanges.

This type of joint structure is not only constructed by directly connecting pipes to each other, but is also constructed by interposing other members.
For example, when each of the two pipes does not have a flange, a screw thread is provided at the end of each pipe, and the pipe end is screwed into an annular member called a phase flange to form a pipe end. Conventionally, a method of forming flanges and then connecting them has been adopted.

The joint structure is constructed not only when the two tubular members to be connected are both pipes, but also when connecting various tubular members.
For example, when connecting a pipe to another pipe having a different diameter, a flange that matches the size of the pipe and a flange that matches the size of another pipe are called different diameter flanges provided at both ends. A method is adopted in which a short tubular member is inserted between pipes.
Further, at the connection point between the flanges having different diameters and the pipes, a joint structure similar to the joint structure when connecting the pipes is formed.

The joint structure is also formed in situations other than the above.
For example, Patent Document 1 below (see paragraph 0022, etc.) discloses a tank provided with a plurality of nozzles for inserting a baffle or a cleaning device, and connects a pipe to such a nozzle. Even in such a situation, a joint structure is formed.
As described above, the conventional joint structure is configured in various aspects in a situation where a plurality of tubular members are directly connected or via other members.

JP-A-2017-87189

In a product with a glass lining as shown in Patent Document 1, maintenance operations such as cleaning are performed frequently, so operations such as disassembly and assembly of the joint structure are also performed frequently. ..
However, the conventional joint structure has a problem that the operation associated with disassembly and assembly is complicated because the joint structure is formed so as to connect the flange portions with a plurality of bolts.
Therefore, it is an object of the present invention to provide a joint structure that is easy to operate when connecting and disconnecting tubular members from each other.

In order to solve the above problems, the present invention
A joint structure in which a first tubular member and a second tubular member are connected directly or via another member.
A first flange portion is formed on the side of the first tubular member at the connection portion, and a second flange portion is formed on the side of the second tubular member.
The first flange portion and the second flange portion are provided with a ferrule shape, and the ferrule clamp forming the ferrule joint structure together with the first flange portion and the second flange portion is further provided.
A joint structure in which one or both of the first tubular member and the second tubular member are glass-lined.
I will provide a.

According to the present invention, since a joint structure that can be assembled and disassembled with a ferrule clamp is provided, these operations can be facilitated.

The schematic front view which showed the tank with a lid which concerns on one Embodiment. FIG. 3 is a schematic cross-sectional view showing a state in which the joint structure according to the first embodiment is cut on a vertical plane. Schematic top view of the joint structure according to the first embodiment (schematic top view taken along the line AA of FIG. 2a). The schematic sectional view of the joint structure which concerns on 2nd Embodiment. The schematic sectional view of the joint structure which concerns on 3rd Embodiment. The schematic sectional view of the joint structure which concerns on 4th Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an example of connecting a pipe to a tank with a lid. In the following, the embodiment of the present invention will be carried out by taking as an example a case where the tank 1 with a lid is a glass-lined container with a glass lining. The form will be described.

First, the tank 1 with a lid will be described.
The tank 1 with a lid of the present embodiment includes a tank 10 and a lid structure 20.
The tank 10 has an opening that communicates the internal space and the external space.
The tank 1 with a lid in the present embodiment includes a tank 10 and a lid structure 20.
The lid structure 20 includes a lid for closing the opening of the tank 10 and a base body as a base for mounting the lid on the tank 10.

The tank 10 is provided with a tank body 11 that defines a storage space so that it can be divided into upper and lower parts, and a lower portion thereof has a bottomed tubular shape.
The lower portion of the tank body 11 is provided with a bottom wall portion 11a which is the bottom of the tank 10 and a peripheral side wall portion 11b which rises in a tubular shape from the outer peripheral edge of the bottom wall portion 11a.
The upper part of the tank main body 11 is provided with a top wall portion 11c provided so as to close the upper opening of the peripheral side wall portion 11b from above.
The tank 10 of the present embodiment further has a tubular portion 12 extending upward from the top wall portion 11c.

The peripheral side wall portion 11b in the present embodiment has a cylindrical shape having an inner diameter (diameter) of 30 cm or more.
The inner diameter of the peripheral side wall portion 11b is usually 3 m or less.
The shape and size of the tank 10 of the present embodiment are not particularly limited, and even if the peripheral side wall portion 11b has an inner diameter of 45 cm or more, the tank 10 has an inner diameter of 60 m or more. It may be in the form.
The peripheral side wall portion 11b may have a square tubular shape or the like.
The tank 10 of the present embodiment does not have to be a vertical type and may be a horizontal type.
In the tank 10 of the present embodiment, the capacity of the tank body can be usually 100 L or more and 100 kL or less.

The tank 10 in the present embodiment has the tubular portion 12 having a through hole penetrating in the vertical direction formed in the top wall portion 11c and extending from the through hole to the external space side of the tank 10 in a tubular shape. ing.
The tank 10 has a first tubular portion 12a extending upward so as to be parallel to a central axis CL extending vertically through the central portion of the peripheral side wall portion 11b, and an upward portion inclined with respect to the central axis. It is provided with a second tubular portion 12b extending to.
The first tubular portion 12a and the second tubular portion 12b are arranged so that their positions in the horizontal direction are located between the central axis CL and the peripheral side wall portion 11b.
The second tubular portion 12b is provided at a position opposite to the first tubular portion 12a via the central axis CL, and is provided in a state of being inclined so as to be separated from the central axis CL as it goes upward. ing.

Each of the first tubular portion 12a and the second tubular portion 12b has an upper end portion and a lower end portion open, and the lower end portion is open on the inner surface of the top wall portion 11c.
That is, the tank 10 is provided with an opening at the upper end of the first tubular portion 12a and the second tubular portion 12b so that the internal space and the external space are communicated with each other.

The tank body 11 of the present embodiment is an integrally molded product in which the bottom wall portion 11a and the peripheral side wall portion 11b are integrally inseparable, and the inner and outer surfaces of the steel container are glass-lined. It is formed.
In the present embodiment, the top wall portion 11c, the first tubular portion 12a, and the second tubular portion 12b are integrally molded products, and the integrally molded product is the lower portion of the tank body 11. It is a steel product with a glass lining similar to the above.

The tank 10 of the present embodiment is an integrally molded product of the top wall portion 11c and the tubular portion 12 in a bottomed tubular container which is an integrally molded product of the bottom wall portion 11a and the peripheral side wall portion 11b. It is in a state of being covered with a certain lid, and is formed by fixing the outer peripheral edge portion of the top wall portion 11c to the upper end portion of the peripheral side wall portion 11b with a plurality of clamps 50.

The first tubular portion 12a of the present embodiment is radially oriented from a tubular body extending tubularly from the top wall portion 11c (hereinafter, also referred to as “first tube main body 12a1”) and an upper end portion of the first tube main body 12a1. It is provided with a flange extending outward (hereinafter, also referred to as “first pipe flange 12a2”).
The second tubular portion 12b of the present embodiment is radially oriented from the tubular body extending tubularly from the top wall portion 11c (hereinafter, also referred to as “second tube main body 12b1”) and the upper end portion of the second tube main body 12b1. It is provided with a flange extending outward (hereinafter, also referred to as “second pipe flange 12b2”).
The pipe bodies (12a1,12b1) of the present embodiment are all cylindrical, and the flanges (12a2, 12b2) are all annular.

A pipe 30 having a flange portion facing the first pipe flange 12a2 is connected to the first tubular portion 12a in the present embodiment.
The first tubular portion 12a and the pipe 30 in the present embodiment form a joint structure and are connected to each other.
The lid structure 20 is attached to the second tubular portion 12b in the present embodiment.

The first embodiment relating to the joint structure will be described below with reference to FIGS. 2a and 2b.
(First Embodiment)
As described above, in the present embodiment, the joint structure 100 is formed so as to connect the first tubular portion 12a and the pipe 30.
That is, the first tubular member among the two tubular members constituting the joint structure 100 in the present embodiment is the first tubular portion 12a of the tank 10, and the second tubular member is the pipe 30.
More specifically, in the joint structure 100 of the present embodiment, a glass lining having the tank main body 11 for accommodating the contents and the first tubular portion 12a which is tubular from the tank main body 11 and extends in a direction away from the tank main body. The first tubular portion 12a of the tank 10 is the first tubular member, and the pipe 30 connected to the tank 10 is the second tubular member.

In the present embodiment, the joint structure 100 is configured so that the pipe 30 is located on an extension line of the first tubular portion 12a.
In the joint structure 100 in the present embodiment, the first tubular portion 12a and the pipe 30 are connected directly or via another member.

The first tubular portion 12a opens upward at a portion where the joint structure 100 is formed, and opens downward at a portion where the pipe 30 and the joint structure 100 are formed.
The joint structure 100 is configured such that the opening of the first tubular portion 12a and the opening of the pipe 30 face each other in the vertical direction, and the flow path in the first tubular portion and the inside of the pipe. It is configured so that it communicates with the flow path of.

The outline of the joint structure 100 in this embodiment will be described below.
In the following, the direction from the first tubular portion 12a to the pipe 30 may be referred to as a first direction, and a direction opposite to the first direction may be referred to as a second direction.
Further, in the following, the first direction may be referred to as an upper direction, and the second direction may be referred to as a lower direction.
Further, in the following, the direction away from the central axis of the first tubular portion 12a, the central axis of the pipe 30, and the direction toward the central axis along the plane orthogonal to the first direction and the second direction. May be referred to as the radial direction.
In the following, the direction away from the central axis may be referred to as outward or outward, and the direction toward the center may be referred to as inward or inward.
Further, in the following, the direction of orbiting around the central axis may be referred to as a circumferential direction.

In the joint structure 100, the first tubular portion side (100X) from the connection portion (joint surface CF) between the first tubular portion 12a and the pipe 30 is the first pipe flange 12a2 of the tank 10. It is composed of one joint member 110.
The joint structure 100 is composed of the pipe 30 and the second joint member 120 on the pipe side (100Y) from the connection point between the first tubular portion 12a and the pipe 30.
In the present embodiment, each of the first joint member 110 and the second joint member 120 is provided with a flange portion having a ferrule shape as described in detail later, and the first joint member 110 The second joint member 120 can be fixed to the second joint member 120 by a ferrule clamp 130 which is a third joint member.

On the side of the first tubular portion 12a on the joint surface CF, a first flange portion 112 having a diameter larger than that of the first pipe flange 12a2 and having a ferrule shape is provided.
The first flange portion 112 is formed of a ring-shaped member that is a separate member from the first tubular portion 12a. More specifically, an inclined surface used for the ferrule joint structure is formed on the outer peripheral portion. It is formed by a tapered ring 112x.

The lower end of the pipe 30 is arranged so as to be in contact with the first joint member 110, and the pipe 30 has a flange extending outward in the radial direction from the lower end (hereinafter, "pipe flange 31"). Also known as).
A second flange portion 122 having a diameter larger than that of the pipe flange 31 and having a ferrule shape is provided on the side of the pipe 30 on the joint surface CF.
The second flange portion 122 is formed of a ring-shaped member that is a separate member from the pipe 30, and more specifically, a taper ring having an inclined surface formed on an outer peripheral portion thereof used for a ferrule joint structure. It is formed by 122x.
The taper ring 122x may be composed of a plurality of divided pieces arranged in the circumferential direction.
That is, the taper ring 122x may have connecting portions between the divided pieces formed at a plurality of locations in the circumferential direction.
By making the taper ring 122x splittable, the taper ring 122x can be easily attached to and detached from the pipe 30.

In the present embodiment, the taper ring 112x (hereinafter, also referred to as “first taper ring 112x”) constituting the first flange portion 112 in the first joint member 110 and the second flange portion 122 in the second joint member 120. The taper ring 122x (hereinafter, also referred to as “second taper ring 122x”) constituting the above has a horizontal surface on one surface side and an inclined surface on the other surface side.

When forming the joint structure 100 in the present embodiment, the first taper ring 112x and the second taper ring 122x are brought into contact with each other so that the horizontal planes face each other.
The contour shapes of the first flange portion 112 and the second flange portion 122 along the outer peripheral edge are circular shapes having substantially the same size, that is, the first taper ring 112x and the second taper ring 122x. Is a circular ring having a common outer diameter, and when the joint structure 100 is formed, the outer peripheral edges are brought into contact with each other in a aligned state.

In the joint structure 100, the first tapered ring 112x constituting the first flange portion 112 and the second flange portion 122 are formed in a state where the first tubular portion 12a and the pipe 30 are connected to each other. The shape including the second taper ring 122x is formed to be an abacus ball shape.

More specifically, the upper surface side of the first flange portion 112 and the lower surface side of the second flange portion 122, which are arranged to face each other in the state where the connection is performed, are the first direction and the second direction. A mating surface is formed parallel to the joint surface CF orthogonal to the above, but the lower surface side of the first flange portion 112 and the second flange on the side opposite to the surface forming the mating surface. Each of the portions 122 with the upper surface side is an inclined surface that is inclined with respect to the joint surface CF.

The inclined surface of the first flange portion 112 is inclined so as to ascend toward the outer side in the radial direction, and the inclined surface of the second flange portion 122 is inclined so as to descend toward the outer side in the radial direction. are doing.
In other words, the inclined surface of the first flange portion 112 and the inclined surface of the second flange portion 122 are configured to approach the joint surface CF as they go outward in the radial direction.

The ferrule clamp 130 in the present embodiment can be switched between a first state in which the ring is closed in an annular shape and a second state in which the ring is opened, and the circumference can be changed in the first state. It is configured in.
The ferrule clamp 130 includes a fastener 131 for changing the peripheral length.
More specifically, the ferrule clamp 130 is provided on the outer periphery of the first flange portion and the second flange portion in a state where the first flange portion 112 and the second flange portion are in contact with each other with their contours aligned. It has a length that can be wound and can be arranged in a circular shape having a diameter larger than the circle drawn by the outer peripheral edge of the first flange portion and the second flange portion when viewed in a direction perpendicular to the mating surface VP. At the same time, the diameter can be reduced by the fastener 131.

When a stress is applied in the direction of reducing the diameter by the fastener 131, the ferrule clamp 130 applies the stress to the inclined surface of the first flange portion 112 and the inclined surface of the second flange portion 122, respectively. It is configured so that it can be transmitted as a radial inward stress.
Then, in the joint structure 100 of the present embodiment, a force is applied from the outside to the inside with respect to each of the inclined surface of the first flange portion 112 and the inclined surface of the second flange portion 122. The force acts in the direction in which the first flange portion 112 and the second flange portion 122 approach each other so that the first tubular portion 12a and the pipe 30 can be connected to each other with high airtightness. It is configured.

The first joint member 110, which is a constituent member on the first tubular portion side, will be described below in the joint structure 100 of the present embodiment.

The first joint member 110 for forming the first flange portion 112 of the present embodiment is a flat tubular first main body mounted so as to surround an opening at the tip of the first tubular portion 12a. The unit 111 is provided.
That is, the first joint member 110 of the present embodiment is configured to slightly extend the flow path passing through the inside of the first tubular portion 12a upward, and the first pipe main body 12a1 has a structure. It is configured to form a continuous passage.

The first joint member 110 in the present embodiment constitutes the first main body portion 111 that defines the communication passage by an inner wall surface, and the first flange portion 112 that is fitted onto the first main body portion 111. It is provided with the ring-shaped taper ring 112x.
In the first joint member 110 of the present embodiment, the taper ring 112x having the ferrule flange structure is a separate member from the first main body portion 111.

The first main body 111 in the present embodiment is composed of a resin ring 111x.
The material of the resin ring 111x in the present embodiment is not particularly limited, but is polytetrafluoroethylene (PTFE), tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene / It can be a molded product made of a fluororesin such as a hexafluoropropylene copolymer (FEP), a tetrafluoroethylene / ethylene copolymer (ETFE), or a polyvinylidene fluoride (PVdF).
The resin ring 111x in the present embodiment may be a molded product using a silicon resin.

The resin ring 111x made of fluororesin and the resin ring 111x made of silicon resin are suitable in that they can exhibit excellent heat resistance and chemical resistance as compared with the case where other general resins are used. ..
The resin ring 111x may contain an inorganic filler such as glass fiber or talc together with a resin such as fluororesin or silicon resin for the purpose of adjusting various physical properties such as abrasion resistance, hardness (elastic modulus), and breaking strength. Good.
The resin ring 111x may appropriately contain other additives such as pigments.

The first end surface 111xa of both end faces of the resin ring 111x is a surface that comes into contact with the piping side, and the opening 110a is defined by the inner peripheral edge thereof.
The resin ring 111x has a diameter corresponding to the piping flange 31, and has a shape that allows the first end surface 111xa to come into surface contact with the piping flange 31 over the entire circumference.
In the present embodiment, the first pipe flange 12a2 and the pipe flange 31 have a common diameter.
Therefore, the resin ring 111x has a diameter corresponding to the first pipe flange 12a2, and has a shape capable of bringing the second end surface 111xb into surface contact with the second pipe flange 12b2 over the entire circumference. Are

The resin ring 111x of the present embodiment has a flat shape on the side of the second end surface 111xb opposite to the first end surface 111xa, whereas the opening 110a is defined on the side of the first end surface 111xa. A groove 111d is provided which passes between the inner peripheral edge and the outer peripheral edge and goes around the opening 110a.
The joint structure 100 further includes an O-ring SL as a sealing material housed in the groove 111d.

The O-ring SL is made of an elastic body such as rubber, and has a shape in which a part of the O-ring SL protrudes from the groove 111d when it is housed in the groove 111d.
That is, the resin ring 111x is provided in the groove 111d so that when the first end surface 111xa is brought into contact with the pipe side, it is brought into contact with the pipe side more strongly to form a more airtight connection state.

The resin ring 111x is provided with a convex portion 111c that protrudes outward at a lower outer corner portion.
The convex portion 111c is provided so as to orbit the outer peripheral edge portion of the second end surface 111xb of the resin ring 111x, and is provided over the entire circumference.

The first surface of both sides of the taper ring 112x that is fitted onto the resin ring 111x is a surface that comes into contact with the piping side together with the first end surface 111xa of the resin ring 111x, and is attached to the joint surface CF. On the other hand, it is parallel.
The second surface of the taper ring 112x opposite to the first surface is the inclined surface to which stress is applied inward by the ferrule clamp 130.
The material of the taper ring 112x is not particularly limited, but it is preferably made of metal, and preferably made of stainless steel.
Since the taper ring 112x is made of metal, the effect that the first surface and the second surface can be processed more precisely than in the case where the taper ring 112x is made of ceramics or glass lining can be easily processed. Play.

At the inner corner of the taper ring 112x on the second surface side in the present embodiment, a step 112x1 having a shape corresponding to the convex portion 111c of the resin ring 111x is formed.
The step 112x1 engages with the convex portion 111c of the resin ring 111x so that the first end surface 111xa of the resin ring 111x does not protrude more than necessary from the first surface when it is fitted onto the resin ring 111x. It is provided in.

The first joint member 110 in the present embodiment further has a split flange portion 113 composed of the split flange 113x.
The split flange 113x is composed of a plurality of split pieces, and the split pieces are combined to form an annular shape.

The first joint member 110 in the present embodiment can be detachably attached to the first tubular portion 12a which is tubular and extends upward from the top wall portion 11c of the tank 10 by the split flange 113x. It is configured.
The split flange 113x is configured to be annular in the undivided state as described above, and its inner diameter is larger than that of the first tube main body 12a1 of the first tubular portion 12a. , The diameter of the first tubular portion 12a is smaller than that of the first tube flange 12a2.
That is, the first joint member 110 in the present embodiment cannot be fixed to the first tubular portion 12a only by the split flange 113x, and the split flange 113x is the first tubular portion 12a. A play (clearance) is provided between the outer peripheral surface and the inner peripheral surface of the split flange 113x so as to fit.

The first joint member 110 of the present embodiment is a connecting bolt 114 as a connecting tool for connecting the split flange portion 113 and the taper ring 112x in a state of being loosely fitted to the first tubular portion 12a. Is further equipped.
The connecting bolt 114 is provided so as to provide a distance between the split flange portion 113 and the taper ring 112x to connect them and adjust the distance between them.
Therefore, the first joint member 110 of the present embodiment is a flange (first pipe flange 12a2) provided at the tip of the first tubular portion 12a between the split flange portion 113 and the taper ring 112x. It is configured to sandwich and be fixed to the first tubular portion 12a.

The first joint member 110 of the present embodiment does not need to detach the split flange 113x when connecting or disconnecting the pipe 30 to the tank 10.
Therefore, the first joint member 110 of the present embodiment may be directly fixed to the pipe body portion (first pipe body 12a1) of the first tubular portion 12a by the split flange 113x. It is not necessary to frequently apply or release the tightening force to the first pipe body 12a1.
However, it is not preferable to apply a strong tightening force to the first tube main body 12a1 to which the glass lining is applied, and the split flange 113x is freed on the first tubular portion 12a as described above. It is preferable to fit it.

The joint structure 100 in the present embodiment has a size corresponding to the first pipe flange 12a2 so that high airtightness can be maintained from the first pipe main body 12a1 to the opening 110a. The annular gasket 140 is interposed between the first pipe flange 12a2 and the resin ring 111x.

The joint structure 100 in the present embodiment has the first pipe flange 12a2, the gasket 140, and the split flange 113x having a portion protruding outward from the resin ring 111x in a top view (second direction view). Is used, and the split flange 113x and the taper ring 112x are connected by a plurality of the connecting bolts 114 on the outside of these.
The connecting bolts 114 in the present embodiment are arranged at equal intervals in the circumferential direction.
Then, in the first joint member 110 of the present embodiment, when the connecting bolt 114 is tightened, the split flange 113x engages with the first pipe flange 12a2 and from the side of the split flange 113x to the taper ring 112x. The tightening force of the connecting bolt 114 acts so as to bring the taper ring 112x closer to the first pipe flange 12a2 as well as being unable to approach the tapering ring 112x.

The taper ring 112x, which is a main member for forming the first flange portion in the present embodiment, has a step 112x1 that engages with the convex portion 111c of the resin ring 111x as described above.
Therefore, in the joint structure 100 of the present embodiment, when the connecting bolt 114 is further tightened, a force generated so as to bring the taper ring 112x closer to the first pipe flange 12a2 is generated through the engagement at the step 112x1. It is transmitted to the resin ring 111x and functions as a compressive force on the gasket 140 inserted between the resin ring 111x and the first pipe flange 12a2.

In the present embodiment, the first joint member 110 is constructed in this way, and the first joint member 110 is firmly attached to the tip of the first tubular portion 12a.

Next, the second joint member 120, which is a constituent member on the piping side, will be described.
The pipe 30, which is the second tubular member of the present embodiment, is provided with a flange (hereinafter, also referred to as “pipe flange 31”) that is one size smaller than the second flange portion as described above.
The taper ring 122x (second taper ring 122x) on the piping side has a ring shape and a ferrule flange structure like the first taper ring 112x attached to the first tubular portion 12a extending from the tank 10. are doing.
Further, the second taper ring 122x has an inner diameter that allows the pipe 30 to be inserted and can be locked to the pipe flange 31.
The second taper ring 122x is provided with a step 122x1 that is locked to the piping flange 31 at a corner on the inner peripheral side of the lower surface.

The second taper ring 122x is configured such that when the pipe flange 31 is locked to the step 122x1, the lower surface side is substantially flush with the pipe flange 31.

The first surface of both sides of the second taper ring 122x is a surface that comes into contact with the first taper ring 112x, and the second surface opposite to the first surface is the ferrule. The inclined surface is inwardly stressed by the clamp 130.
The material of the second taper ring 122x should not be particularly limited as in the case of the first taper ring 112x constituting the first tubular member.
The second taper ring 122x is preferably made of metal, preferably stainless steel.
Since the second taper ring 122x is made of metal, it has an effect that the first surface and the second surface can be easily processed precisely as in the case of the first taper ring 112x.

The second taper ring 122x of the present embodiment has a step 122x1 formed on the inner peripheral edge portion on the first surface side as described above.
The step 122x1 is formed in a state of being lowered by one step in the first direction (upward) from the other portion, and is provided so as to engage the piping flange 31 and the second taper ring 122x. There is.

While the first joint member 110 is firmly fixed to the first tubular portion 12a, the second joint member 120 in the present embodiment is not particularly fixed to the pipe 30. ..
When the second joint member 120 of the present embodiment is mounted on the first joint member 110 by the ferrule clamp 130, a tightening force applied to the ferrule clamp 130 is applied to the second taper ring 122x. It becomes a force for moving the taper ring 122x downward, and the force is transmitted to the pipe flange 31 at the step 122x1.
The second joint member 120 is firmly fixed to the tank 10 together with the pipe 30 by forming the ferrule joint structure with the ferrule clamp 130, the first taper ring 112x, and the second taper ring 122x. It is configured to be.

As described above, the joint structure 100 in the present embodiment is a joint structure in which the first tubular member and the second tubular member are directly connected or via another member, and the connection is made. A first flange portion is formed on the side of the first tubular member and a second flange portion is formed on the side of the second tubular member, and the first flange portion and the second flange portion are formed. A ferrule shape is provided in each portion, and a ferrule clamp that constitutes a ferrule joint structure together with the first flange portion and the second flange portion is further provided, and one of the first tubular member and the second tubular member. Or both have glass linings.

Conventionally, the pipe flange and the second pipe flange in the present embodiment utilize a plurality of through holes provided in both, and bolts inserted through the through holes are fixed with nuts.
Therefore, conventionally, it is necessary to fasten and release a plurality of bolts and nuts each time the pipe and the tank are connected or disconnected.
On the other hand, in the present embodiment, for example, moving the tank 10 or connecting another pipe to the tank 10 can be easily performed only by operating the ferrule clamp.

In the conventional method using bolts and nuts, the tightening force of each bolt and nut is adjusted so that the pressure acting between the pipe flange and the second pipe flange does not vary in the circumferential direction. be able to.
On the other hand, when the ferrule clamp 130 is used, it is difficult to perform such partial pressure adjustment.
In this regard, in the joint structure 100 formed in the present embodiment, the side of the first tubular member (first tubular portion 12a) from the portion connected by the ferrule joint structure is the first tubular member and the first tubular member. It is composed of a first joint member which is a separate member from the tubular member, and the first flange portion is formed on the first joint member.
That is, in the present embodiment, since the edge between the first flange portion and the first tubular portion 12a is cut off, the force applied to the first flange portion by the ferrule clamp remains as it is. Even if the force applied to the first flange portion is not transmitted to the tubular portion 12a and is transmitted to the first tubular portion 12a, the variation can be alleviated.
In the present embodiment, the glass lining is applied to the first tubular member, but the action of a strong local force on the glass lining can also be suppressed by the fact that the first joint member is a separate member. ..
The same applies to the side of the second tubular member (pipe 30) in this respect.

The joint structure 100 in the present embodiment has the above-mentioned advantages by having the above-mentioned structural features, but in the present invention, it is not always the first tubular member or the second tubular member. Does not have to be a separate member.

The joint structure 100 in the present embodiment may be further improved with respect to the above-exemplified embodiment.
In this regard, other embodiments will be described below.

(Second Embodiment)
FIG. 3 is a diagram showing a joint structure 100 according to the second embodiment.
The joint structure 100 according to the second embodiment is the same as the joint structure 100 according to the first embodiment with respect to the structure on the side (100X) of the first tubular member.
On the other hand, the joint structure 100 according to the second embodiment is different from the joint structure 100 according to the first embodiment in terms of the structure on the side (100Y) of the second tubular member.

In the second embodiment, the second taper ring 122x constituting the second flange portion 122 has an inner diameter larger than the outer diameter of the pipe flange 31, and can pass through the pipe flange 31. ..
Then, in the second embodiment, the split flange 122y having an inner diameter larger than that of the pipe body portion of the pipe 30 and smaller than the diameter of the pipe flange 31 so as to be locked to the pipe flange 31 (hereinafter, "" It also has a second split flange 122y).
In the second embodiment, the second dividing flange 122y is provided with a connecting bolt 126 for fixing the second taper ring 122x.
It should be noted that the second split flange 122y is a split flange on the side of the first joint member in that it is composed of a plurality of split pieces and that it can be changed between an annular shape and an open state. It is the same as 113x.

The joint structure 100 of the second embodiment is configured such that the second taper ring 122x fixed to the second split flange 122y locked to the pipe flange 31 is arranged on the outer peripheral portion of the pipe flange 31.
As a result, the side (100Y) of the second tubular member in the second embodiment functions in the same manner as the second tubular member in the first embodiment.
Moreover, in the second embodiment, since the second tubular member is attached to the pipe by the second split flange 122y, the second tubular member can be easily removed from the pipe 30 by putting the second split flange in the split state. be able to.
That is, the second tubular member in the second embodiment can be easily removed from the pipe 30 and attached to another pipe.

Next, the joint structure 100 according to still another embodiment will be described.
(Third Embodiment)
FIG. 4 is a diagram showing a joint structure 100 according to a third embodiment. In this joint structure 100, the second tubular member is not a pipe 30, but has different diameters provided with flanges having different diameters at both ends. The flange 40 is different from the joint structure 100 according to the second embodiment, and other configurations are common to the joint structure 100 according to the second embodiment.

The different diameter flange 40 has flanges 42 and 43 at both ends of a short tubular (flat tubular) main body 41, respectively, and the first flange 42 and the other end provided on one end side of the main body. The diameter is different from that of the second flange 43 provided on the side.
Therefore, the different diameter flange 40 can connect pipes having different diameters to one end side and the other end side.

By using the joint structure 100 of the third embodiment, a pipe having a diameter different from that of the pipe 30 of the first embodiment can be connected to the tank.
Moreover, in the present embodiment, if a plurality of flanges having different diameters having different flange sizes on the other end side are prepared, the joint structure 100 is provided with a function as an adjuster when connecting pipes having various diameters to the tank. can do.

The same function can be exhibited in the joint structure according to the fourth embodiment described below.
(Fourth Embodiment)
FIG. 5 is a diagram showing a joint structure 100 according to a fourth embodiment.
The joint structure 100 of the fourth embodiment is the same as the joint structure 100 of the previous embodiments with respect to the structure on the side (100X) of the first tubular member.
The joint structure 100 is the same as the joint structure 100 according to the first embodiment and the second embodiment in that the second tubular member is a pipe.
However, the pipe 30'used as the second tubular member here does not have a pipe flange at the end and has a common diameter up to the end.
Strictly speaking, the pipe 30'used in the fourth embodiment has a slightly smaller outer diameter in that a screw thread is formed on the outer peripheral surface at the end portion.

The fourth embodiment is different from the joint structure 100 of the first embodiment in that a screw that can be screwed with the pipe 30'is provided on the inner peripheral surface of the taper ring forming the second flange portion 122. ing.
That is, in the fourth embodiment, the first aspect is that a phase flange 122x'that can form a flange structure at the end of the pipe 30'by screwing the end of the pipe 30'is provided as a second taper ring. It is different from the joint structure 100 of the embodiment.

In the joint structure 100 of the fourth embodiment, the side (100Y) of the second tubular member from the portion connected by the ferrule joint structure as described above is the second tubular member and the second tubular member. The pipe 30 is composed of a second joint member 120 which is a separate member, the second flange portion 122 is formed on the second joint member 120, and the second tubular member is glass-lined. The second joint member is fixed to the end of the pipe 30'and has a phase flange 122x' for forming a flange at the end of the pipe 30'.

The joint structure 100 of the fourth embodiment exhibits a function as an adjuster when connecting pipes of various diameters to the tank if a plurality of phase flanges having different inner diameters are prepared as in the third embodiment. To do.
The connection between the phase flange and the pipe may be performed by brazing if necessary.

As described above, the joint structure of the present invention is not limited to the specific examples as described above, and various modifications can be made.

1: Tank with lid, 10: Tank, 11: Tank body, 11a: Bottom wall, 11b: Peripheral wall, 11c: Top wall, 12: Tubular, 20: Lid structure, 30, 30': Piping , 31: Piping flange, 40: Different diameter flange, 41: Main body, 42: First flange, 43: Second flange, 50: Clamp, 100: Joint structure, 110a: Opening, 111: First Main body, 111c: Convex, 111d: Groove, 111x: Resin ring, 112: First flange, 112x: Tapered ring, 112x1: Step, 113x: Divided flange, 122: Second flange, 122x: Tapered ring, 122x': Phase flange, 122x1: Step, 122y: Split flange, 130: Ferrule clamp, 131: Tightener, 140: Gasket, CF: Joint surface, CL: Central axis, SL: O ring

Claims (6)

A joint structure in which a first tubular member and a second tubular member are connected directly or via another member.
A first flange portion is formed on the side of the first tubular member at the connection portion, and a second flange portion is formed on the side of the second tubular member.
The first flange portion and the second flange portion are provided with a ferrule shape, and the ferrule clamp forming the ferrule joint structure together with the first flange portion and the second flange portion is further provided.
A joint structure in which one or both of the first tubular member and the second tubular member are glass-lined. The side of the first tubular member from the portion connected by the ferrule joint structure is composed of the first tubular member and the first joint member which is a member different from the first tubular member.
The first flange portion is formed on the first joint member, and the first flange portion is formed.
The joint structure according to claim 1, wherein the first tubular member is provided with the glass lining. The side of the second tubular member from the portion connected by the ferrule joint structure is composed of the second tubular member and the second joint member which is a member different from the second tubular member.
The second flange portion is formed on the second joint member, and the second flange portion is formed.
The joint structure according to claim 1 or 2, wherein the second tubular member is provided with the glass lining. The tubular portion of the tank body for accommodating the contained object and the glass-lined tank having the tubular portion extending in a tubular shape from the tank body is the first tubular member and is connected to the tank. The joint structure according to any one of claims 1 to 3, wherein the pipe is the second tubular member. The joint structure according to claim 3 or 4, wherein the second tubular member is a flange having a different diameter in which flanges having different diameters are provided at both ends. The side of the second tubular member from the portion connected by the ferrule joint structure is composed of the second tubular member and the second joint member which is a member different from the second tubular member.
The second flange portion is formed on the second joint member, and the second flange portion is formed.
The second tubular member is the pipe with the glass lining.
The joint structure according to claim 4, wherein the second joint member is fixed to the end of the pipe and has a phase flange for forming a flange at the end of the pipe.