JP3889581B2 - Flange clamp device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flange clamping device suitable for fixing a butt flange portion of a piping member.
[0002]
[Prior art and problems]
As a conventional flange clamping device, for example, one described in Japanese Utility Model Publication No. 7-25508 is known. This clamp device for a flange is configured such that a support block, a coupling block, and a coupled block are arranged at predetermined intervals via a link member that is swingably coupled by a pin, and coupled to a coupling block located at an end. The block is rotatably coupled to the coupling block, and is tightened and coupled by screwing the male screw portion of the male screw member having the knob portion at the base end portion with the female screw portion of the coupled block, and is arranged in an endless ring shape. Further, the flange clamping device clamps the butt flange portion by the inner surface of each block.
[0003]
However, in such a conventional flange clamping device, both side surfaces of the support block form a substantially flat surface, and all of the bases of the protrusions of the support block are connected to the main body. Therefore, the protrusion of the support block can hardly be deformed with respect to the main body.
[0004]
For this reason, when the flange clamping device is tightened against the butt flange, and the flange clamping device undergoes a diameter expansion deformation with long-term use, the support block protrusions also follow the diameter expansion movement almost. Since it is not elastically deformed, it loosens between the butt flange portion.
[0005]
Further, the link member that is pin-coupled to both side surfaces has a structure that can be largely rotated with respect to the support block, the coupling block, and the coupled block. For this reason, the support block or the like and the link member are easily relatively rotated, and the support block or the like tends to take an inappropriate posture, so that the assembly work efficiency of the flange clamping device is lowered. When the protrusions such as the support block are thinly formed so as to be easily elastically deformed, a pair of protrusions with the link member positioned on the side of the protrusion when the flange clamping device is assembled. There is a technical problem that the elastic member is elastically deformed so as to increase the interval, and this causes the link member to be expanded and damaged.
[0006]
[Means for Solving the Problems]
The present invention has been made in view of such a conventional technical problem, and its configuration is as follows.
According to the first aspect of the present invention, at least one support block 2, coupling block 3, and coupled block 4 are arranged at predetermined intervals via a link member 5 that is swingably coupled by a pin 7. The coupling block 3 and the coupled block 4 which are positioned at the portion are rotatably supported by the coupling block 3, and the male threaded portion 8 b of the male threaded member 8 having the knob portion 8 c at the base end is connected to the female threaded portion 4 a of the coupled block 4. The abutting flange portions (33a, 34a) are clamped by the inner surfaces of the pair of projections 22 of each block (2, 3, 4) that are tightened and coupled to each other by being screwed together. A flange clamping device,
The support block 2 has a main body portion 21 and a pair of protrusions 22 to which the base portion 22a is connected to the main body portion 21, and the link members 5 are coupled to both sides of the main body portion 21 of the support block 2, respectively. At the same time , the base 22a of each protrusion 22 is connected to the main body 21 via a connecting portion 22c having a thickness t that is thinner than the thickness of the base 22a, and the main body of the base 22a of each protrusion 22 portion projecting from 21 forms a stepped surface 22b, Ri each link member 5 lockable der the stepped surface 22b, and a part of the connecting portion 22c is the body portion of the base portion 22a of the protrusions 22 The flange clamping device is characterized in that the elastic deformation in the vicinity of the connecting portion 22c is allowed by being connected to 21 .
A second aspect of the present invention is the flange clamping device according to the first or second aspect, wherein the two support blocks 2 are provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
1 to 8 show an embodiment of a flange clamping device, and reference numeral 20 denotes a flange clamping device. As shown in FIGS. 1 and 2, the flange clamping device 20 includes a plurality of (two in the figure) support blocks 2 arranged at a predetermined interval, and a support block 2 located on one side. Each of the coupled blocks 3 and one coupled block 4 disposed on the other side of the support block 2 located on the other side. The support block 2, the coupling block 3, and the coupled block 4 are each made of metal, and are linked by a link member 5 in the longitudinal direction (circumferential direction of the piping members 33 and 34 shown in FIG. 1). The coupling block 3 and the coupled block 4 which are coupled to each other and located at both ends are connectable by a male screw member 8 which will be described later.
[0008]
Each support block 2 has the same shape, and has a rectangular main body 21 and a pair of protrusions 22 to which the base 22a is connected to the main body 21, as shown in FIGS. It is left-right symmetric when viewed from the front, and a part of the longitudinal direction of the base portion 22a of each projection 22 is connected to the main body 21 in a direction orthogonal to the longitudinal direction of the piping members 33 and 34 shown in FIGS. Yes. That is, the protrusions 22 are formed on the inner side surfaces so as to protrude from both side surfaces 21 a of the main body 21, and the connection portion of the protrusion 22 to the main body 21 is compared with the thickness T of the base 22 a of the protrusion 22. Thus, it is connected to the main body portion 21 via a connecting portion 22c having a thin wall thickness t and being thinner than the base portion 22a. The outer surface of the portion of the base portion 22a that protrudes from both side surfaces 21a of the main body portion 21 forms a step surface 22b. The step surface 22 b has a function of locking the link member 5.
[0009]
The protrusions 22 of the support block 2 are formed at both ends in the direction perpendicular to the longitudinal direction of the flange clamping device 20, and the inclined inner surfaces of the protrusions 22 that face each other are the outer peripheral portions of the butted flange portions 33a and 34a. The U-shaped surface 23 is formed so as to be clamped. 21 b is an insertion hole for the pin 7 formed in the main body 21.
[0010]
The number of the support blocks 2 is determined mainly by the size of the outer diameter of the outward flange portions 33a, 34a of the piping members 33, 34.
[0011]
The coupling block 3 is formed with projections 3b as both ends in the direction perpendicular to the longitudinal direction, and the inclined inner surfaces facing each other of the projections 3b clamp the outer peripheral portions of the butt flange portions 33a and 34a. The surface is formed. Further, as shown in FIG. 6, the coupling block 3 has a through hole 3a orthogonal to the pin 7 and extending in the longitudinal direction, and the male screw member 8 is attached to the through hole 3a so as to be rotatable and non-movable in the axial direction. is there. Actually, the male screw member 8 is inserted into the through-hole 3a, and the annular step surface 8a of the male screw member 8 is brought into contact with the end face of the coupling block 3 via the wave washer 13 that also functions as a thrust bearing. The E-ring) is used to prevent it from coming off. The male screw member 8 has a male screw portion 8b at the distal end protruding from the through hole 3a, and a knob portion 8c at the proximal end.
[0012]
On the other hand, the coupled block 4 is formed with protrusions 4b as both ends in the direction perpendicular to the longitudinal direction, and the inclined inner surfaces facing each other of the protrusions 4b clamp the outer peripheral portions of the butted flange portions 33a and 34a. The U-shaped surface is formed. Moreover, the to-be-joined block 4 has the internal thread part 4a orthogonal to the pin 7 and extending in a longitudinal direction, as shown in FIG. 2, FIG.
[0013]
Note that the outer shape of the coupling block 3 and the coupled block 4 is the same shape as the support block 2 in a front view, and the outer surfaces of the base portions respectively protruding from both side surfaces of the main body portion form step surfaces 32b and 42b. is doing. The step surfaces 32b and 42b also have a function of locking the link member 5.
[0014]
The link member 5 is provided between the adjacent support blocks 2, between the support block 2 and the coupling block 3 at one end, and between the support block 2 and the coupled block 4 at the other end. 20 are arranged on both side surfaces in the direction perpendicular to the longitudinal direction, and are coupled by a pin 7 so as to be swingable. Specifically, the pins 7 are respectively disposed through both end portions (insertion holes 21b) of each support block 2, and one end portions of the link members 5 are respectively inserted into both end portions of each pin 7, and snap rings are used. It is designed to prevent it from coming off.
[0015]
In addition, a pair of pins 7 project from the opposite end portions of the coupling block 3 and the coupled block 4 on the outer side of the through hole 3a and the female screw portion 4a. One end is inserted and the snap ring is used to prevent it from coming off. Thus, each link member 5 and each block 2, 3, 4 can swing relative to each other about the pin 7 as a fulcrum. Three pairs of link members 5 are used in FIG.
[0016]
Each of the link members 5 shown in the figure has an arc shape so that the flange clamping device 20 forms a circle, and it is favorable that each link member 5 interferes with the outer peripheral surfaces of the piping members 33 and 34. Although the shape to prevent is given, since the clamp device 20 for flanges fastens and fixes the outward flange portions 33a and 34a of the piping members 33 and 34, the piping member has a smaller diameter than the flange portions 33a and 34a. If there is no possibility of interfering with the outer peripheral surfaces of the cylindrical portions 33 and 34, it is possible to form the link members 5 so as to form a straight line.
[0017]
Thus, the male threaded portion 8b of the male threaded member 8 is screwed into the female threaded portion 4a of the coupled block 4, and the knob portion 8c is gripped and screwed in, thereby supporting block 2, coupled block 3, coupled block 4 and link member. 5 can be reduced in diameter in an endless annular state. Since each link member 5 has an arc shape, the flange clamping device 20 forms a substantially circular shape in a state where the male screw portion 8 b of the male screw member 8 is screwed into the female screw portion 4 a of the coupled block 4. .
[0018]
Next, the operation of the above embodiment will be described.
As shown in FIG. 7, the flange clamping device is used to clamp the flange portions 33 a and 34 a in a state where the pair of piping members 33 and 34 are in contact with each other. Here, the upper flange portion 34 a of the lower piping member 34 is abutted against the lower flange portion 33 a of the upper piping member 33, and the flange portions 33 a and 34 a are fastened and fixed by the flange clamping device 20.
[0019]
In this tightening and fixing operation, first, the male threaded portion 8b of the male threaded member 8 is unscrewed into the female threaded portion 4a of the coupled block 4 and the flange 3 is opened between the coupled block 3 and the coupled block 4. The clamping device 20 surrounds the flange portions 33a and 34a that make a pair. In addition, 40 is a seal ring interposed between the flange portions 33a and 34a, 41 is an annular support member that supports the inner periphery of the seal ring 40, and 42 is an annular support member that supports the outer periphery of the seal ring 40. It is a support member.
[0020]
Next, the flange portions 33a, 34a are received between the opposing inner surfaces of the protrusions 22, 3b, 4b of each support block 2, the coupling block 3, and the coupled block 4, and the male threaded portion 8b of the male threaded member 8 is coupled. The block 4 is screwed into the female screw portion 4a, and the knob portion 8c is gripped and screwed. At this time, since the link member 5 can be locked to the step surface 22b of each support block 2, the inversion of the support block 2 is suppressed. Thereby, work efficiency can be improved. Similarly, since the link member 5 can be locked to the step surfaces 32b and 42b of the coupling block 3 and the coupled block 4, the inversion of the coupling block 3 and the coupled block 4 is suppressed. Thereby, the workability | operativity fall which inserts and screwes the external thread part 8b of the external thread member 8 to the internal thread part 4a of the to-be-joined block 4 is prevented.
[0021]
In this way, the flange clamping device 20 comprising the support block 2, the coupling block 3, the coupled block 4 and the link member 5 is gradually reduced in diameter while being connected in an endless ring shape. The U-shaped surfaces formed by the inclined inner surfaces facing each other of the projections 22, 3b, 4b are firmly attached to the outer peripheral surfaces of the flanges 33a, 34a, respectively, and the butt flanges 33a, 34a are fastened and fixed. Thus, the butt flange portions 33a, 34a are firmly and fluid-tightly clamped by the inner surfaces of the blocks 2, 3, 4 of the flange clamping device 20 having an endless annular shape.
[0022]
As the butt flange portions 33a and 34a are tightened, the pair of protrusions 22 of each support block 2 is elastically deformed so as to spread on both sides as shown in an exaggerated manner in FIG. At this time, the vicinity of the connecting portion 22c of the protruding portion 22 to the main body portion 21 has a thin thickness t as compared with the thickness T of the base portion 22a of the protruding portion 22, and therefore the elasticity of the vicinity of the connecting portion 22c. Deformation is allowed, and the vicinity of the connecting portion 22c is greatly elastically deformed to increase the interval.
[0023]
For this reason, when the flange clamp device 20 is connected in an endless ring shape and the butted flange portions 33a and 34a are tightened, the flange clamp device 20 is expanded in diameter with long-term use. The pair of protrusions 22 are elastically deformed so as to reduce the interval. Thereby, it is satisfactorily prevented that the tightening state of the butt flange portions 33a and 34a is loosened. Since the outer shape of the coupling block 3 and the coupled block 4 is also the same shape as the support block 2 in a front view, these projecting portions 3b and 4b are also elastically deformed in the same manner as the projecting portion 22 of the support block 2, and the butt flange It functions to prevent loosening of the tightened state of the portions 33a, 34a.
[0024]
【The invention's effect】
As will be understood from the above description, according to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, the support block has a main body portion and a pair of protrusions to which the base portion is connected to the main body portion, and a part of the base portion of each protrusion portion is connected to the main body portion. . For this reason, when the flange clamping device undergoes diameter expansion deformation with long-term use, the pair of protrusions of each support block elastically deform so as to reduce the interval. As a result, loosening of the tightening state of the butt flange portion is satisfactorily prevented.
[0025]
In addition , the link members are coupled to both sides of the main body portion of the support block, and a portion protruding from the main body portion of the base portion of each projection portion forms a step surface, and each link member can be locked to the step surface. is there. For this reason, a big rotation that a link member latches to the step surface of each support block and a support block inverts is controlled. As a result, the assembly work efficiency of the flange clamping device is improved.
[0026]
In addition, when the flange clamping device is assembled, the link member is locked or faced to the stepped surface of each support block, and the state where the link member is positioned on the side of the protruding portion can be avoided. For this reason, even when the pair of protrusions of the support block are elastically deformed so as to increase the interval during the assembling operation, the link member is suppressed from being spread. As a result, the link member is well prevented from being damaged during the assembly operation.
[Brief description of the drawings]
FIG. 1 is a plan view showing an assembled state of a flange clamping device according to an embodiment of the present invention.
2 is a cross-sectional view taken along line II-II in FIG.
FIG. 3 is an enlarged front view of the support block.
FIG. 4 is an enlarged plan view of the support block.
FIG. 5 is a cross-sectional view showing the support block.
FIG. 6 is a cross-sectional view showing a coupling block and a coupled block.
FIG. 7 is a cross-sectional view showing the assembled state of the flange clamping device.
FIG. 8 is also an explanatory diagram of the operation of the support block.
[Explanation of symbols]
2: support block, 3: coupling block, 4: block to be coupled, 4a: female screw part, 5: link member, 7: pin, 8: male screw member, 8b: male screw part, 8c: knob part, 20: clamp for flange Device, 21: body part, 22: protrusion part, 22a: base part, 22b: step surface, 33a, 34a: flange part.

Claims (2)

At least one support block (2), coupling block (3), and coupled block (4) are arranged at predetermined intervals via a link member (5) that is swingably coupled by a pin (7). The male block member (8) having the coupling block (3) located at the end and the coupled block (4) rotatably supported by the coupling block (3) and having a knob portion (8c) at the base end. A pair of protrusions of each block (2, 3, 4) which are tightened and coupled by screwing the male thread portion (8b) of the block to the female thread portion (4a) of the coupled block (4) and arranged in an endless ring shape A flange clamping device for clamping the butt flange portion (33a, 34a) by the inner surface of the portion (22),
The support block (2) has a main body (21) and a pair of protrusions (22) to which the base (22a) is connected to the main body (21), and the main body of the support block (2) The link member (5) is coupled to both sides of (21), and the base (22a) of each protrusion (22) has a smaller thickness (t) compared to the thickness of the base (22a). A portion projecting from the main body portion (21) of the base portion (22a) of each projection portion (22) forms a step surface (22b) connected to the main body portion (21) via the connection portion (22c) , each link member to the stepped surface (22b) (5) is Ri lockable der, and the base part of the connecting portion (22a) (22c) is the main body (21) of the protrusions (22) by connecting, furan, characterized in that the elastic deformation of the vicinity of the connection portion (22c) is permitted Use the clamping device.   2. The flange clamping device according to claim 1, wherein two support blocks (2) are provided.

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