CN208221820U - Chain clasp and installation tool for vacuum flange docking - Google Patents

Abstract

The present application discloses a chain clamp and an installation tool for butt jointing of vacuum flanges, wherein the chain clamp includes: a chain that can be butted into a ring, and the chain includes a plurality of clasps connected by hinges, and the outer surface of the clasp is There is a fixed part for docking installation tools, and fastening screw holes for docking are provided at both ends of the chain. In this application, first insert a metal sealing ring between the two flange faces to be butted; the fixing rod fixes each link of the chain clamp to achieve pre-positioning; the mounting rod can carry the fixing bolt and screw it on the clamp At the butt joint of the valves, the sealing ring is squeezed by the flange, so that the sealing ring is deformed and filled between the flange faces to achieve sealing, thereby completing the non-contact installation of the chain clamp, which is easy to operate and facilitates rapid realization in high-radiation environments. loading and unloading.

Description

Chain clamps and installation tools for vacuum flange butt joints

technical field

The present application relates to the field of accelerators, in particular to a chain clamp and an installation tool for butt jointing of vacuum flanges.

Background technique

In the field of particle accelerators, the connection of the vacuum system usually adopts a standard knife-edge flange structure, which has better safety and reliability. However, for high-current proton accelerators such as the China Spallation Neutron Source (CSNS), due to the large radiation dose, the replacement and repair of damaged parts must be completed in the shortest possible time after the equipment in the tunnel fails, so the pipeline connection , The connections at the pump port and so on are all chain-type quick-release devices. As a complex large-scale scientific research equipment, the particle accelerator is limited by physical and mechanical requirements, and the installation space in some areas is small. Therefore, it is necessary to install small-sized flanges in high-radiation and small spaces.

In the field of accelerators, there are clamps used to install knife-edge flanges, but its structure makes it difficult to install in a narrow space, and the installation takes a long time, which is extremely inconvenient.

Contents of the invention

The present application provides a chain clamp and an installation tool for butt jointing of vacuum flanges, aiming at solving the problem of difficulty in butt jointing of vacuum flanges in a high-radiation environment.

The present application discloses a chain clamp for butt jointing of vacuum flanges, which includes: a chain that can be butt jointed into a ring, the chain includes a plurality of clasps connected by hinges, and the outer surface of the clasp is provided with In the fixed part of the tool, the chain is provided with fastening screw holes for butt joint from end to end.

In the above-mentioned chain clamp for butt joint of vacuum flanges, the fixing part is a fixing screw hole provided on the surface of the clamp flap.

In the chain clamp used for butt jointing of vacuum flanges, the joints of the chains are connected by fastening bolts matching the fastening screw holes.

In the chain clamp for butt joint of vacuum flanges, the chain includes two end-to-end connections, and each chain includes two clips.

A tool for installing a chain clamp, wherein the clamp is the above-mentioned clamp, the tool includes a mounting part, the mounting part includes a mounting rod, and the end of the mounting rod is provided with a Unscrew the working part of the fixing bolt.

The tool, wherein the tool further includes a fixing piece, the fixing piece includes a fixing rod and an extension section fixed at the end of the fixing rod, and the extension section is provided with a screw thread suitable for the fixing screw hole .

The said tool, wherein, the tail of the rod body is provided with a handle perpendicular to its axial direction.

A butt joint method of vacuum flanges, wherein the above-mentioned chain clamp is installed using the above-mentioned tools, and the front installation method includes:

Pre-positioning, screw the extended section of the fixed rod into the fixing hole of the chain clamp, and wrap the clamp around the flange joint; the chain clamp is the above-mentioned vacuum flange joint chain clamp;

Fix the clamp, fix the fastening bolt to the end of the working part of the installation rod, and screw it in the fastening screw hole at the butt joint of the chain clamp;

Take back the installation tool, take back the fixing rod and the installation rod, the fixing rod is the above-mentioned fixing rod, and the described installation rod is the above-mentioned installation rod.

The butt joint method of the vacuum flange, wherein, before the pre-positioning, it also includes:

Install the gasket, placing the gasket between the flange faces.

In the butt joint method of vacuum flanges, the sealing ring is a metal sealing ring.

For the chain clamp and installation tool used for the butt joint of vacuum flanges given in this application, the sealing ring made of metal is inserted between the two flange faces to be butted; the fixing rod fixes each of the chain clamp link to achieve pre-positioning; the mounting rod can carry the fixing bolt and screw it on the joint of the clasp, and squeeze the sealing ring through the flange, so that the sealing ring is deformed and filled between the flange faces to achieve sealing, thus completing the chain The non-contact installation of the clamp is easy to operate and convenient for quick loading and unloading.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the clamp in the embodiment of the present application;

Figure 2 is an exploded view of the clamp in the embodiment of the present application;

Fig. 3 is a schematic structural diagram of an installation tool in an embodiment of the present application;

Fig. 4 is a schematic diagram of the installation state of the clamp in the embodiment of the present application;

FIG. 5 is a schematic structural diagram of a sealing ring in an embodiment of the present application;

Fig. 6 is a schematic structural diagram of a sealing ring in another embodiment of the present application;

FIG. 7 is a schematic structural diagram of a fixture for installing a sealing ring in an embodiment of the present application.

Detailed ways

The present application will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.

The vacuum flange butt joint sealing ring given in this embodiment, as shown in Figure 1 and Figure 2, the clamp 1 includes a chain that can be connected in a ring, and the chain includes a plurality of clasps 10 that are hinged to each other. The surface is provided with a fixing part for docking with an installation tool. Wherein, the clamp 1 can be a single chain, which is connected end to end and locked when in use, or can be a plurality of chains, which are connected from end to end in order to form a ring when in use, and the joints are locked. In this embodiment, the clip 1 includes two chains, and each chain includes two hinged clip flaps 10. The fixing portion provided on the outer surface of the clasp 10 may be a hole or buckle or other structure for docking. In this embodiment, the fixing portion is a fixing screw hole 11 . Fastening screw holes 12 are arranged on the clip flaps 10 at both ends of the chain, and the clip 1 is locked by screwing fastening bolts 13 matched with the fastening screw holes 12 .

The application also discloses a tool for installing the above-mentioned seal ring, as shown in Figure 3 and Figure 4, including a mounting part 2 and a fixing part 3, the mounting part 2 includes a mounting rod 20, and a handle fixed at the tail of the mounting rod 20 21, the working part fixed on the end of the installation rod 20, the working part is used to screw the fastening bolt 13 at the butt joint of the chain. In this embodiment, the fastening bolt 13 is an inner hexagonal bolt, the working part at the end of the installation rod 20 is an inner hexagonal wrench 22, and the handle 21 is a hexagonal nut structure suitable for hand-held screwing. Of course, it can also be other suitable hand-held A twisted structure, such as an in-line crossbar, or a crank handle. The installation rod 20 is tubular, and the non-contact remote installation can be realized by screwing the fastening bolt 13 through the installation rod 20, without using complicated tools, the structure is simple, and the operation is convenient.

The fastening bolt 13 needs to be carried by the hexagon wrench 22 into the fastening screw hole 12 of the clamping valve 10. In order to ensure that the fastening bolt 13 falls off the mounting rod 20 during the process, a hexagonal wrench 21 is evenly distributed near the end. The ring shrapnel is tightened to the center by the shrapnel to clamp the tail of the fastening bolt 13 to prevent it from falling off.

Fixture 3 comprises fixed rod 30, is arranged on the handle 31 of fixed rod 30 afterbody and is arranged on the extension section 32 of fixed rod 30 ends, and extension section 32 surface is provided with the screw thread that is matched with fixing screw hole 11. Wherein, the handle 31 is a horizontal handle perpendicular to the axial direction of the fixing rod 30 . When in use, the extension section 32 is screwed into the fixing screw hole 11, and the clip valve 10 is fixed on the end of the fixing rod 30, and then the chain is set on the two butt flanges 4 by operating the fixing rod 30, and then through the installation The rod 20 screws the fastening bolt 13 in the fastening screw hole 12 and tightens it, and then reversely twists the fixing rod 30 to withdraw the mounting rod 20 and the fixing rod 30 .

As shown in FIG. 5 , in order to realize the sealing between the flanges 4 , a sealing ring 5 is also provided between the two butted flanges 4 . The sealing ring 5 is made of metal, such as aluminum, which has better aging resistance than traditional rubber sealing rings. The both sides of the sealing ring 5 facing the end face of the flange 3 are respectively provided with a convex portion 51 surrounding the sealing ring 5, and the top of the convex portion 51 shrinks continuously, so that the axial section of the convex portion 51 is trapezoidal (the width of the upper bottom of the trapezoidal section is less than 0.1 mm), or form a blade shape with a triangular cross-section in the axial direction. In this embodiment, the protruding portion 51 adopts a blade-shaped structure with a triangular cross-section as an example for exemplary disclosure. With such a structural design, the contact area between the sealing ring 5 and the end face of the flange 4 is reduced. As long as a small clamping force is applied to the flange 4, the convex part 51 of the sealing ring 5 will be subjected to great pressure. , so as to produce ductile deformation of the metal, and fill the gap at the joint of the flange 4 to achieve sealing. At the same time, by controlling the clamping force of the flange 4 to control the deformation of the sealing ring 5, the sealing ring 5 can be reused for many times, and its deformation will increase on the basis of the previous one each time it is used until it meets the sealing requirements. It is required that the sealing ring 5 be scrapped when the protrusion 51 disappears due to the extension of the metal after repeated use.

As shown in Figure 6, in order to increase the sealing performance of the sealing ring 5, in other embodiments of the present application, the convex portion 51 may include two rings with different heights and edge angles, which are respectively the convex portion 511 of the outer ring and the convex portion 511 of the inner ring. 512, the edge height of the outer ring convex portion 511 is greater than that of the inner ring convex portion 512, and the angle of the cutting edge of the outer ring convex portion 511 is larger than that of the outer ring convex portion 512 (and the blade shape of the inner ring convex portion 512 is sharper). If the end face of the flange 4 is relatively rough and the convex portion 511 of the outer ring is squeezed and deformed greatly, the sealing cannot be achieved. If the pre-tightening force is applied to the clamp 1, the convex portion 511 of the inner ring will be deformed. , thus filling the gap between the flange 4 contact surfaces. Since the cutting edge angle of the concave part 511 of the inner ring is smaller, the force-bearing area at the cutting edge is small, so that a large deformation will be generated under a small external force. Therefore, on the basis of the deformation of the convex part 512 of the outer ring, as long as Adding a small amount of pre-tightening force will cause deformation of the convex portion 511 of the inner ring, reducing the difficulty of operation.

When the sealing ring 5 is placed between the contact surfaces of the flanges 4, it will slide down under the influence of its own weight, which affects positioning and is not conducive to remote installation. In order to solve this problem, the circumferential surface of the sealing ring 5 in this embodiment is provided with a fixed piece 52, and the fixed piece 52 extends to both sides along the axial direction of the sealing ring 5, forming an arc shape (along the outer edge of the sealing ring ) metal sheet whose arc length is less than half the circumference of the sealing ring 5. In order to facilitate remote installation, the sealing ring 5 is provided with an assembly portion on the circumferential surface of the fixing piece 52 for docking with the installation fixture. The assembly part includes a notch 531 on the surface of the fixing piece 52, and a cavity 532 communicating with the notch 531. Both the notch 531 and the cavity 532 are arc-shaped, and the arc length of the cavity 532 is larger than the notch 531, and the position is closer to the sealing The center of the circle.

As shown in Figure 7, the installation fixture includes an extendable telescopic rod 61, the end of the telescopic rod 61 is provided with a fixed block 62, and the middle parts of the two sides of the fixed block 62 are respectively provided with concave draw grooves 63, One end of the draw-in slot 63 is open along its length direction, and the other end is closed, so that the end face of one side of the fixed block 62 (perpendicular to the draw-in slot 63 direction) is "I"-shaped, and the other side is rectangular. Between the two locking slots 63 is a spacer portion 64 connecting the top surface 621 and the bottom surface 622 of the fixing block 62 . Wherein, the spacer 64 fits into the notch 531 , and the bottom surface 62 of the fixing block 62 fits into the cavity 532 .

When the sealing ring 5 is installed, first connect the fixture with the installation part, and direct the opening end of the slot 63 of the fixed block 62 towards the assembly part, and make the bottom surface 622 of the fixed block 62 fall into the cavity 532, and the spacer 64 fall into the gap 531 , while the top surface of the fixing block 62 covers the surface of the fixing sheet 52 . In this way, the sealing ring 5 is fixed on the fixing block 62. Since one end of the draw-in groove 63 is closed, the problem that the fixing block 62 slips out from the other side when the sealing ring 5 is docked with the fixing block 62 is prevented. After the sealing ring 5 is fixed on the jig, operate the jig to insert the sealing ring 5 between the two flanges 4 from top to bottom, then move the telescopic rod 61 along the axial direction of the sealing ring 5, and withdraw the fixing block 62 from the gap 531, And take back telescopic rod 61. Wherein, the fixing piece 52 covers the circumferential surface of the flange 4, plays a role of hooking, and positions the sealing ring 5 to prevent it from sliding down. In order not to affect the matching relationship between the flange 4 and the inner groove of the clamp 1, the size of the fixed piece 52 in the axial direction is smaller than the thickness of the two flanges 4 after butt joint, that is, the two axial boundaries of the fixed piece 52 are in contact with the two flanges. There is a gap between the outer edges of the blue 4. The sealing ring is made of aluminum or gold or silver with good ductility.

The present application also provides a method for installing the clip using the above-mentioned installation tool, including steps:

S1. Install the sealing ring

Butt the fixture with the installation part, operate the fixture to fix the sealing ring on the fixture, insert the sealing ring between the two flanges from top to bottom in the operating fixture, and the fixing piece covers the circumferential surface of the flange to play a hook The function of hanging is to position the sealing ring and prevent it from sliding down.

S2, clamp pre-positioning

Screw the extended section of the fixing rod into the fixing hole of the sealing ring, and wrap the clamp around the joint of the flange, so that the periphery of the flange enters the annular groove in the clamp. It is also possible to spray molybdenum disulfide lubricant on the contact surface between the clamp and the flange in advance to reduce the friction coefficient of the contact surface, which is beneficial to reduce the pre-tightening force of the vacuum seal.

S3, fixed clamp

Fix the fixing bolt to the end of the working part of the installation rod, and screw it in the fastening screw hole at the joint of the sealing ring, control the tightening degree of the fixing bolt until the sealing ring deforms and fills the gap between the flange surfaces ;

S4. Take back the installation tool

Take back the fixing rod and the mounting rod.

The sealing ring, installation tool and installation method of the vacuum flange butt joint given in this application, first insert the metal sealing ring between the two flange faces to be butted; the fixing rod fixes each flap of the sealing ring , to achieve pre-positioning; the mounting rod can carry the fixing bolt and screw it on the butt joint of the clasp, squeeze the sealing ring through the flange, so that the sealing ring is deformed and filled between the flange faces to achieve sealing, thus completing the sealing of the sealing ring Non-contact installation, simple operation, convenient for quick loading and unloading.

The above content is a further detailed description of the present application in conjunction with specific implementation modes, and it cannot be considered that the specific implementation of the present application is limited to these descriptions. For those of ordinary skill in the technical field to which the present application belongs, some simple deduction or replacement can also be made without departing from the inventive concept of the present application.

Claims (7)

1. a kind of chain clasp for vacuum flange docking characterized by comprising the chain circularized can be docked, it is described Chain includes the multiple card valves being hinged, and card valve outer surface is equipped with the fixed part for abutting joint tool, the chain Head and the tail both ends are equipped with the fastening screw hole for docking.

2. the chain clasp for vacuum flange docking as described in claim 1, which is characterized in that the fixed part is setting Fixing threaded hole on card valve surface.

3. as claimed in claim 2 for vacuum flange docking chain clasp, which is characterized in that the chain by with institute The compatible fastening bolt of fastening screw hole is stated to be mutually butted.

4. the chain clasp for vacuum flange docking as described in claim 1, which is characterized in that the chain includes two Two chains of circular ring shape can be butted into, each chain includes two card valves.

5. a kind of for installing the tool of chain clasp, which is characterized in that the clip is any chain of claim 1-4 Formula clip, the tool include fixing piece, and the fixing piece includes fixed link and the extension for being fixed on the fixed boom end, The extension is equipped with screw thread compatible with the fixing threaded hole.

6. tool as claimed in claim 5, which is characterized in that the tool further includes installation part, and the installation part includes peace Bar is filled, the installation boom end is equipped with the work department for screwing the fastening bolt.

7. tool as claimed in claim 5, which is characterized in that the fixed link tail portion is equipped with perpendicular to its axial handle.