JPH04181068A - Installation jig of gasket for flange member - Google Patents

Abstract

PURPOSE:To position a gasket on a flange so as to be installed simply, speedily and accurately by positioning bolt inserting holes in notches in the first contact plate part having a circular arc shape, and supporting the outer peripheral part of a gasket with the inner peripheral part of the first contact plate part. CONSTITUTION:An installation jig 20 of a metallic gasket is made of a plate form member having a circular arc shape, and is constituted of the first contact plate parts 21 having a circular arc shape to be brought into contact with the edge surface of a flange member and the second contact plate parts 22 having a circular arc shape formed so as to curve in the right angle direction to this surface, and the first contact plate parts 21 are arranged extendedly at an angular interval of less than 180 degrees, and notches 23a and 23b are formed within this range so as to extend in the outward direction of diameter, and the inner peripheral parts of projection parts 24, 25a and 25b are formed as circular arc surfaces approximately equal to outer diameter (d1) of the metallic gasket. When an installation jig 20 is applied to the lower part of one flange member 30, the first contact plate part 21 is brought into contact with the edge surface of the flange member 30, and since the second contact plate part 22 of the installation jig 20 is brought into contact with the outer peripheral side surface 35, after fastening tight the space between the flange members so as to be narrowed, the metallic gasket is inserted therein from the upper space.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mounting jig for a gasket for a flange member.

[Prior art and its problems] Fig. 9 shows a flange member (1), which is a so-called conflat flange, and has a number of bolt insertion holes (2) formed on its outer periphery. We are letting
A circular edge portion (4) is formed between the center hole (3) and the bolt insertion hole (2). Further, a circular groove (5) for receiving a ring-shaped metal gasket is formed on the radially outer side of this. A ring-shaped metal gasket (6) (made of copper, which is a soft metal, for example) is positioned in this circular groove (5) as shown in the figure, and the center hole (6a) of this metal gasket (6) is a conflat
It is aligned with the central hole (3) of the flange (1) and has an outer diameter slightly smaller than the outer diameter of the circular groove (5) of the conflat flange (11).
), the thickness t is greater than the distance t' from the top of the circular edge portion (4) to the left end face of the conflat flange [11 in the drawing. That is, when it is placed in the groove (5) and positioned in contact with the edge part (4) of the conflat flange (1), it protrudes slightly from the left end surface of the conflat flange (11). As shown in Figure 1O, the other conflat flange (11) of the same shape aligns and abuts the bolt insertion holes (2) and (12),
) into each bolt insertion hole (2) (12), then insert the bolt insertion hole (
12) Attach a nut (1) to the shaft of the bolt (14) that protrudes from the
5) by screwing and tightening these.
The flanges (1) and (11) are airtightly connected with a metal gasket (6) interposed between them. When installing such a metal gasket (6) to the conflat flange (1), (6) Be careful not to damage the other side's conflat flange (If
) must be consistent with At this time, the metal gasket (6) is inserted into the groove (5) of the conflat flange (1).
must be positioned accurately. Then, the bolt (14) is inserted and tightened and fixed with the nut (15), but it may damage the metal gasket (6).
Vacuum leakage will occur if it is not inserted into the groove (5) with accurate positioning. Both conflat flanges are arranged horizontally, so if you want to install the metal gasket (6) horizontally, the work is not that difficult, but if the conflat flanges are arranged vertically or at an angle close to that If the metal gasket (6
) is very difficult to maintain. Especially in the case of equipment that requires ultra-high vacuum, such as accelerators, the vacuum parts used must be handled cleanly, and the sealing surfaces of metal gaskets and conflat flanges must never be scratched. . Despite this, the working space for joining the two conflat flanges is limited, and there are many heavy objects, so the workability of installing the metal gasket is very poor.
It requires a lot of time and effort. In addition, multiple people are required for the work, and the work of installing the metal gasket (6) depends on the experience and skill of the work, such as removing scratches and accurate positioning. The method is currently not established.

[Problems to be Solved by the Invention] The present invention has been made in view of the above problems, and provides a gasket mounting jig for flange members that allows anyone to easily, quickly, and accurately position and mount a gasket on a flange. The purpose is to provide.

[Means for Solving the Problems] The above object is to provide a circular arc-shaped first contact plate portion that extends in the radial direction and forms one notch, and extends in an angular range of 180 degrees or less; It consists of a second abutting plate part that is concentric with the first abutting plate part and extends bent in a right angle direction, forming a circular groove for receiving a ring-shaped gasket, and having a circular groove extending from the outside of the groove. a flange portion in which a plurality of bolt insertion holes are formed at equal angular intervals on one side, and the second contact plate portion is brought into contact with the outer circumferential side surface of one of the pair of flange members to be mutually connected. , the bolt insertion holes are located in the notches of the first abutment plate so that these bolt insertion holes are not blocked, and the inner peripheral edge of the first abutment plate is located at the outer peripheral edge of the gasket. This is achieved by a mounting jig for a gasket for a flange member, which is characterized in that the gasket is supported by the flange member.

[For production]

The second abutting plate part of this jig is brought into contact with one outer peripheral side surface of both flange members to be joined, and at this time, the first abutting plate part abuts on the end face of this flange member, but the first abutting plate part Position the notch in the plate part so that it does not block any of the bolt insertion holes in the flange part of the flange member, that is, so that the bolt insertion holes are located in the notch, and the operator manually inserts the bolt insertion holes. 1,
The second contact plate portion is held while maintaining the above contact. On top of this, position the other flange member so that the bolt insertion holes are all aligned and make them face each other, and if these flange members are now arranged vertically, one of the bolt insertion holes in the lower half. A bolt is inserted through the bolt, and a nut is attached to the shaft of the bolt protruding from the other flange member to temporarily fasten the bolt. In this state, the gasket can be inserted from above into the gap between the two flange members, but the gap is made as small as possible, and the gasket is inserted from above through the gap between the two flange members. Position it in the groove of one flange member. From this temporary state, insert the bolt through the key metal for inserting the other bolt, screw the nuts onto these shafts, tighten them, and gradually bring both flange members closer together until they fit into the groove of one flange member. After tightening the jig supporting the positioned gasket to the extent that it can be pulled out downward, the jig is pulled out downward. Thereafter, tighten the nuts threaded onto the bolts so as to apply an even tightening torque in the same way as when normal flanges are connected. By interposing the gasket accurately positioned in the groove of the flange as described above, 2
Since the two flange members are tightened and fixed with bolts,
The degree of vacuum of the vacuum device including both of these flange members is sufficiently good, and the degree of ultra-high vacuum can be guaranteed even when used in a device that requires ultra-high vacuum, such as an accelerator. In addition, since it can be easily positioned and installed as described above, the contact surface of the flange can be
Ultra-high vacuum properties can be reliably guaranteed without causing damage to the gasket when installing it or damaging the gasket.

Moreover, what conventionally required a lot of time and effort, and in some cases required multiple personnel, can be performed by one person, and the time required can be significantly reduced.

[Embodiment] Figures 1 and 2 show a metal gasket mounting jig according to a first embodiment of the present invention. It consists of an arc-shaped first contact plate part (21) which is brought into contact with the end face of the flange member, and an arc-shaped second contact plate part (22) which is bent in a direction perpendicular to this surface. and the first contact plate part (2
1) extends at angular intervals of 120 degrees according to this embodiment, and within this range, the notches [
23a) [23bl is formed. In other words, a protrusion (24) extending radially inward at the center and protrusions (25a) (25b) at both ends are formed, and the inner peripheral edges of these protrusions (24) f25a) and (25b) are symmetrical. It is formed as a circular arc surface with a diameter approximately equal to the outer diameter d1 of the metal gasket attached to the flange member.

Further, the second abutting plate part (22) extends concentrically within the same angular range as the first abutting plate part (21), and as shown in FIG. is a value slightly larger than the outer diameter of the outer peripheral surface of the target flange member.

The metal gasket mounting jig (20) of this embodiment is constructed as described above, and is made of aluminum, for example, and can be easily obtained by molding or sheet metal processing.

Next, the operation of interconnecting two flange members using the mounting jig (20) having the above configuration will be explained with reference to FIGS. 3 and 4.

As shown in Fig. 3, in the outer periphery of the flange member (conflat flange) to be coupled with each other in this embodiment, a large number of bolt insertion holes (30) are provided at equal angular intervals.
1) is formed, and a central hole (32) concentric with this is formed.
A circular groove for receiving a metal gasket between the
33) is formed, and this inner peripheral edge and the center hole (32
) is formed with a circular edge portion (34).

The other flange member also has a similar configuration, and the lower part of the one flange member (30) (assuming that the flange members to be coupled with each other are arranged vertically) is shown in FIG. Apply the mounting jig (20) as shown.At this time, as shown in Fig. 4, the first abutment plate (21) is attached to the flange member (
30), and the second abutting plate portion (22) of the mounting jig (20) abuts on this outer peripheral side surface (35).

In the above state, the other flange member (40
) for each bolt insertion hole [31] as shown in Figure 4.
(After aligning 411, these flange members f30) Insert bolts (50) into some of the bolt insertion holes located at the lower part of (40), and protrude from the other flange member (40). A nut (52) is screwed onto the shaft (51) of the bolt (50). By tightening these, a temporarily fixed state is obtained. In FIG. 4, it is assumed that the metal gasket (55) is shown or not yet inserted. As the several bolts (50) for temporary fixing are tightened as described above, the gap S between the flange members (30) and (40) gradually becomes smaller. Tighten the metal gasket (55) to the extent that it can be inserted from the upper gap S, then insert the metal gasket (55) from above at a certain gap S, and then use the mounting jig (which is held in contact with the lower part by hand). 20
) is placed on the inner peripheral edge of the first abutting plate part (21). Therefore, the metal gasket (55) is accurately attached to the flange member (
30) in the groove (33). On top of this, insert the bolts (5) into all of the other bolt insertion holes (31) [41].
0) and tighten until the jig (20) can be pulled out downward until the minimum gap between both flange members f30) (40
) to approach each other and pull out the jig (20) downward. After that, the bolts will be tightened.

As described above, both flange parts [30] (4Q) are attached to the bolt (5o) with the metal gasket (55) interposed therebetween.
However, since the metal gasket (55) is accurately positioned and tightened to the full extent (33) of the flange member C30), the edge portion (34) is made of soft metal, which is ideal for the metal gasket (55). This ensures that the airtight effect is achieved.

5A and 5B show a metal gasket mounting jig according to a second embodiment of the present invention and a flange member to which the jig is applied.
6o) has the dimensions as shown in the figure, and a metal gasket mounting jig (61) extending within a range of 120 degrees is applied thereto as in the first embodiment. This mounting jig (61) also has an arcuate first abutting plate part (62) and a second abutting plate part (63) projecting perpendicularly at the radially outer end of the first abutting plate part (62), similar to the first embodiment. and has dimensions as shown. Also, this mounting jig (61)
A pair of notches (64a) (64
b) is formed, and the mounting jig (61) is configured at an angle that allows the mounting jig (61) to be installed without blocking the bolt insertion holes (66) formed at equal angular intervals in the flange member (6o). are doing. The metal gasket installation work is the same as in the first embodiment.

6A and 6B show a metal gasket mounting jig according to a third embodiment of the present invention, and the mounting jig (71) has a shape as shown in FIG. 6B, and this is applied. Notches (74a) and (74b) are formed so that bolt insertion holes (75) formed at equal angular intervals in the flange member (70) are positioned therebetween. Projection part (75a) (75
bl and the inner peripheral edge of the central protrusion (76) are configured to support the outer peripheral edge of the metal gasket. The dimensions are also as shown in the figure, and are configured to stably hold the metal gasket and position it accurately.

FIG. 7 shows a metal gasket mounting jig (80) according to a third embodiment of the present invention. In addition to the second contact plate portion (82) bent to
The abutment plate part (82) is integrally formed with a knob part (83) formed at its center. Although not shown in the drawings, the grip portion (83) facilitates the operation of holding the flange member in contact with the outer circumferential surface and the end surface thereof.

Although each embodiment of the present invention has been described above, the present invention is of course not limited to these, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiments, the metal gasket is made of copper, but of course it is not limited to this (the present invention is applicable to all conventional materials used for metal gaskets).

Furthermore, in the above embodiments, the metal gasket mounting jig is made of aluminum, but it is of course not limited to this, and may be made of any material as long as it can securely hold and position the metal gasket, and other metals, It can be made of plastic or wood.

Further, in the above embodiments, the mounting jig was assumed to extend within a range of 120 degrees, but of course it is not limited to this, and may extend within a range of 180 degrees.
Any angle may be used as long as it can support the metal gasket at an angle of less than 1°.

Furthermore, in the above embodiments, a so-called conflat flange has been described as the flange member, but the present invention is not limited to this, and can generally be applied to any flange member in which a metal gasket is interposed. Also, the material of the jig is not limited to metal (it may also be made of plastic or wood).

[Effects of the Invention] As described above, according to the mounting jig for a gasket for a flange member of the present invention, the work of positioning the gasket on the flange member can be performed much more easily than before.
Moreover, by performing the process accurately, the airtightness of the vacuum device to which this flange member is applied can be reliably obtained.

[Brief explanation of drawings]

FIG. 1 is a plan view of a mounting jig for a metal gasket for a flange member according to a first embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view along the line ■-■ in FIG. 1, and FIG. 3 is a first embodiment of the present invention. A plan view of the flange member and the above-mentioned mounting jig applied to the fourth
The figure is a sectional view showing a state in which the same flange member and a flange member of the same structure are combined and a mounting jig, and Fig. 5A is a mounting jig for a metal gasket for a flange member of the second embodiment and a flange member to which this is applied. , FIG. 5B is an enlarged sectional view along the line VB-VB in FIG. 5A, and FIG. 6A is a mounting jig for a metal gasket for a flange member according to a third embodiment of the present invention, and a flange member to which this is applied. Partially cutaway plan view, FIG. 6B is VB − in FIG. 6A.
VT B-line direction enlarged sectional view, FIG. 7 is a plan view of a mounting jig for a metal gasket for a flange member according to the third embodiment of the present invention, FIG. 8 is an enlarged sectional view in the ■-■ line direction of FIG. Figure 9 is a cross-sectional view showing the state in which the metal gasket is positioned on the flange member of the conventional example, and Figure 1O is the 9th
FIG. 7 is a cross-sectional view showing a state in which the other flange member is connected with bolts with the metal gasket positioned in the figure interposed therebetween. In the figure, (20)... Metal gasket mounting jig (21)... First contact plate part (
22) - Second contact plate part (23a)
123b)... Notch
Ki (30) ・・・・・・・・・ F
Lunge member (31)・・・・・・・・・
・ Bolt insertion hole (33) ・ ・・・・
Circular groove (35)...
・ ・ ... Outer circumference side (40)
・・・ ・・・ Franc
J member (41)... Bolt insertion hole (55)... Metal gasket (60)...Fla
Ring member (61)
Metal gasket installation jig (62)...
・・First contact plate part (63)・・・・・・・・・・Second
Contact plate part f64al [64bl ・,,,,,
Notch key (70) ・・・・・・・・・・・・
Flange member (71)...
...Mounting jig (72)...
・・・・・・・・・ Metal gasket (74a) f7
4b) “”” Notch (80)
・・・・・・・・・・・・ Mounting jig (
81)・・・・・・・・・First contact plate part (82)・
・・・・・・・・・Second contact plate part Figure 1 Figure 2 Figure 3 (33) ・Circle tt cylinder Tatsumi (35) Outer peripheral side Figure 4 Figure 5A Figure V8-su. . / Figure 5B Figure 7 To ■

Claims (1)

[Claims] forming at least one notch extending radially;
Consisting of an arc-shaped first abutting plate part extending in an angular range of 180 degrees or less, and a second abutting plate part concentric with the first abutting plate part and extending bent in a right angle direction. , has a flange portion in which a circular groove for receiving a ring-shaped gasket is formed, and a plurality of bolt insertion holes are formed at equal angular intervals on the radially outer side of the groove; The second abutment plate is brought into contact with the outer circumferential side of one of the flange members, and the bolt insertion holes are positioned in the notches of the first abutment plate to close these bolt insertion holes. do not let it happen,
A mounting jig for a gasket for a flange member, characterized in that an outer peripheral edge of the gasket is supported by an inner peripheral edge of the first abutting plate.