CN210143151U - Position and angle adjustable static cutter assembly - Google Patents

Abstract

The utility model provides a position and angularly adjustable static cutterbar assembly, it includes an adjustment mechanism and installs the static cutterbar on this adjustment mechanism, adjustment mechanism includes down the plywood, and the rigid coupling has a plurality of bull's eye bearings on the plywood, a plurality of bull's eye bearing tops are equipped with an upper plate by its support. The utility model discloses a position and angularly adjustable static cutterbar assembly adopts the combination of upper and lower plywood and bull's eye bearing to realize between upper plywood and the lower plywood on the ascending portable in the two-dimensional direction, has realized the adjusting bottom plate structure on two layers on the one hand for its simple structure is reasonable, and on the other hand replaces current guide rail through adopting the bull's eye bearing, makes the relative motion of two plywoods not retrain in two-dimentional, is consequently difficult to take place the card and dies.

Description

Position and angle adjustable static cutter assembly

Technical Field

The utility model belongs to proton treatment synchrotron field, concretely relates to static cutterbar assembly of position and angularly adjustable.

Background

The proton beam injection and extraction in the proton treatment synchrotron adopts a mode of multi-circle smearing injection and slow extraction. The multiple circles of smearing injection, namely, each circle of smearing injection is injected to different positions of the phase space, so that the whole phase space is approximately and uniformly filled; the slow extraction utilizes the free oscillation frequency close to third-order resonance in the horizontal direction, the third-order resonance driving term provided by the resonance sextupole iron in the ring enables the phase space triangular stable region in the horizontal direction to be gradually reduced, and particles exceeding the acceptance degree can move along the stable dividing boundary line, lose stability and are far away from a normal beam track. Whether injected or extracted, an electrostatic cutting plate (septim) must be placed in the appropriate position to deflect the beam into the desired trajectory.

An electrostatic cutter is essentially a parallel electrode plate in vacuum, one of which is a grounded cutting plate (i.e., the anode) and the other of which is connected to a negative high voltage (i.e., the cathode). Electrostatic cutters rely on applying high voltage between a cutting plate and a cathode to provide a beam deflecting electric field. The cutting plate is typically thin to reduce losses in the beam as it is extracted. An area without an electric field is arranged in a channel between the cutting plate and the fixing mechanism, and circulating beam current passes through the area; the extracted beam current passes through a channel between the cutting plate and the high-voltage cathode, and the required deflection angle is provided by the electric field. Because of the high pressure, the electrostatic cutter is typically placed within a vacuum chamber. To optimize the efficiency of the injection extraction, the position and angle of the cutting plate of the electrostatic cutter sometimes need to be adjusted.

The conventional adjustment scheme is that a guide rail is additionally arranged on one layer of bottom plate to realize translation, and a bearing is additionally arranged on the other layer of bottom plate to realize rotation, so that the scheme needs three layers of bottom plates, and translation and rotation are implemented separately, so that the scheme is relatively complicated and heavy; and because the guide rail can not be lubricated in high vacuum, faults such as guide rail jamming and the like are easy to generate.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a position and angularly adjustable static cutterbar assembly to simplify its adjustment mechanism's structure, and be difficult to block.

In order to achieve the above object, the utility model provides a position and angularly adjustable static cutterbar assembly, it includes an adjustment mechanism and installs the static cutterbar on this adjustment mechanism, adjustment mechanism includes down the plywood, and the rigid coupling has a plurality of bull's eye bearings on the plywood down, a plurality of bull's eye bearing tops are equipped with an upper plate by its support.

The electrostatic cutter comprises a cathode, a cutting plate C-shaped frame and a cutting plate arranged on the cutting plate C-shaped frame, wherein one or more cathode supporting columns used for being fixedly connected with the cathode and one or more anode supporting columns used for being fixedly connected with the cutting plate C-shaped frame are arranged on the upper surface of the upper plate.

And two mechanical transmission feed-in pieces which are hinged and fixed with the upper plate and do linear motion are arranged on one side surface of the upper plate.

Each mechanical transmission feed-in piece comprises a connecting rod and a hinging seat hinged with one end of the connecting rod, and is fixed on the upper plate through the hinging seat.

The connecting rods are parallel to each other.

The vacuum steel cylinder is used for accommodating the adjusting mechanism and the electrostatic cutter, and the connecting rod penetrates through the vacuum steel cylinder.

The bottom of the vacuum steel cylinder is provided with a saddle, and the lower layer plate is fixedly connected with the saddle.

And four corners of the saddle are provided with three-dimensional adjusting and locking mechanisms.

The lower plate is provided with a plurality of openings.

The quantity of bull's eye bearing is 6 at least, and the size is unanimous.

The utility model discloses a position and angularly adjustable static cutterbar assembly adopts the combination of upper and lower plywood and bull's eye bearing to realize between upper plywood and the lower plywood on the ascending portable in the two-dimensional direction, has realized the adjusting bottom plate structure on two layers on the one hand for its simple structure is reasonable, and on the other hand replaces current guide rail through adopting the bull's eye bearing, makes the relative motion of two plywoods not retrain in two-dimentional, is consequently difficult to take place the card and dies. Furthermore, the utility model discloses a mechanical transmission feed-in piece adopts the self-adaptation rotation axis to be connected with being connected of upper plate, takes the translation of static electricity cutter when these two mechanical transmission feed-in piece moving direction are unanimous with the stroke to it is rotatory to drive static cutterbar when moving direction or stroke are inconsistent, consequently in the design, the dead possibility of card is not taken place in this kind of motion that does not have the guide rail design.

Drawings

FIG. 1 is a structural elevation view of a position and angle adjustable electrostatic cutter assembly according to one embodiment of the present invention;

FIG. 2 is a schematic diagram of the electrostatic cutter and its adjustment mechanism of the electrostatic cutter assembly shown in FIG. 1;

fig. 3 is a partially enlarged view of the electrostatic cutter and its adjustment mechanism shown in fig. 2 in another direction.

Detailed Description

The present invention will be further described with reference to the following specific embodiments. It should be understood that the following examples are illustrative of the present invention only and are not intended to limit the scope of the present invention.

Fig. 1 shows an electrostatic cutter assembly with adjustable position and angle according to an embodiment of the present invention, which includes an adjusting mechanism 10, an electrostatic cutter 20 installed on the adjusting mechanism 10, and a vacuum steel cylinder 30 for accommodating the adjusting mechanism 10 and the electrostatic cutter 20, wherein a saddle 31 is provided at the bottom of the vacuum steel cylinder 30 for fixedly connecting with the adjusting mechanism 10.

Wherein. The electrostatic cutter 20 includes a cathode 21, a cutting plate C-frame 22, and a cutting plate 23 mounted on the cutting plate C-frame 22. The cutting plate 23 is composed of a plurality of metal strips side by side, and no gap exists between the metal strips, so that the condition that the beam current passing through the electrostatic cutter 20 changes the track due to the leakage electric field of the electrostatic cutter 20 is avoided, and the condition that residual gas ions ionized by the beam current bombard the cathode 21 through the gap between the metal strips of the cutting plate 23 is avoided, therefore, an ion trap is not needed to be arranged, and the equipment is greatly simplified. In addition, the cutting plate 23 is set as thin as possible to minimize the loss of beam current through the electrostatic cutter 20.

The adjusting mechanism 10 comprises an adjusting bottom plate 11 which has two layers and comprises a lower plate 112, a plurality of bull-eye bearings 12 are fixedly connected to the lower plate 112, and an upper plate 111 supported by the bull-eye bearings 12 is arranged above the bull-eye bearings 12, so that the upper plate 111 can freely move on a supporting surface formed by the bull-eye bearings 12. The upper plate 111 is constrained in the vertical direction in addition to the movement in the horizontal plane, and therefore the upper plate 111 is also constrained in the vertical direction by the bull's eye bearing 12. In the present embodiment, the number of the bull's eye bearings 12 is at least 6. The plurality of bull's eye bearings 12 are of uniform size and resilient contact is required between the upper plate 111 and the bearing balls of the bull's eye bearings 12.

The lower plate 112 of the adjusting mechanism 10 is fixedly connected with the saddle 31 of the vacuum steel cylinder 30, four corners of the saddle 31 are respectively provided with a three-dimensional adjusting and locking mechanism (not shown), the adjusting ranges of the three-dimensional adjusting and locking mechanisms in three directions are respectively +/-10 mm, the three-dimensional adjusting and locking mechanisms are used for initial accurate positioning of the lower plate 112 in the installation process, and the lower plate 112 is fixedly connected with the saddle 31 after the installation and positioning are finished. In addition, in order to reduce the weight of the lower plate 112 and increase the vacuum conductance, as many openings as possible may be provided in the lower plate 112 without affecting the strength of the lower plate 112.

As shown in fig. 2, one or more cathode supporting columns 14 are disposed on the upper surface of the upper plate 111 for fixedly connecting with the cathode 21, and one or more anode supporting columns 15 are disposed for fixedly connecting with the C-shaped frame 22 of the cutting board, and two mechanical transmission feeding members 13, which are hinged and fixed to the upper plate 111, are disposed on one side of the upper plate 111 for feeding linear motion from the external atmosphere into the vacuum environment, so as to drive the upper plate 111 to translate and rotate.

As shown in fig. 3, each of the feeding mechanical members 13 includes a connecting rod 131 penetrating through the vacuum steel cylinder 30 and a hinge seat 132 hinged to one end of the connecting rod 131, and the connecting rod 132 is fixed on the upper plate 111 to hinge with the upper plate 111, wherein the connecting rods 131 are parallel to each other, the feeding mechanical members 13 are movable along the direction of the connecting rod 131 and are vertically constrained by the vacuum steel cylinder 30, so that the moving directions of the feeding mechanical members 13 are all on the same plane, therefore, when the moving directions and strokes of the feeding mechanical members 13 are completely the same, the upper plate 111 is translated, and the electrostatic cutter 20 is driven to translate, when the moving directions or strokes of the feeding mechanical members 13 are different, the rotation of the upper plate 111 is realized, and the electrostatic cutter 20 is driven to rotate, in general, one of the feeding mechanical members 13 is simply fixed (i.e., the stroke is 0), and the other feeding mechanical members 13 can realize different rotation angles by adjusting the suitable stroke d, assuming that the hinge seats 132 of the feeding mechanical members 13 are at an angle L, the distance of beam current value 35d is equal to ± 10mm, and the current cutting position is equal to ± 10 mm.

Therefore, the utility model discloses an electrostatic cutter assembly only drives electrode subassembly through two mechanical transmission feed-in piece drive upper plate in the use, can realize the manual regulation of the position of electrostatic cutter 20 and angle outside vacuum steel cylinder 30 to upgrade for automatically regulated foundation in the future.

The working principle of the position and angle adjustable electrostatic cutter assembly of the present invention will be described with reference to fig. 1. In the vacuum cylinder 30, the beam current from the upstream side of the electrostatic cutter 20 is divided into two parts by the cutting board 23 when it reaches the cutting board inlet. Part of the beam current enters a high-voltage electric field channel between a cathode 21 of the electrostatic cutter and a cutting plate 23, and the charged proton beam is subjected to the acting force of an electric field and is deflected to a certain extent relative to the original movement direction, gradually gets away from the original beam group, enters a magnetic field channel of a static magnetic cutting magnet, reaches a transport line and finally enters a treatment room. The other part of the beam current cut off by the cutting plate 23 is positioned in a high-voltage electric field-free channel between the cutting plate C-shaped frame 22 and the cutting plate 23, is not influenced by an electric field, continues to move around a synchrotron ring along the original path, and comes to the cutting plate inlet after one turn, and like the last time, divides the cutting plate into two parts, wherein one part of the beam current enters the high-voltage electric field channel between the cathode 21 and the cutting plate 23 and is then led out, and the rest part of the beam current continues to circulate until the required beam current is completely led out. In order to precisely control the size of the extracted beam, the electrostatic cutter 20 and its cutting plate 23 need to be capable of accurate adjustment of position and angle relative to the centerline of the beam. The utility model discloses a position and angularly adjustable electrostatic cutter assembly only adopt two-layer regulation bottom plate for simple structure is reasonable, can adjust the translation and the rotation in a plane of electrostatic cutter 20 and cutting board 23 in a flexible way conveniently, and then optimizes the injection of line and draws forth. And simultaneously, because the utility model discloses an adjust the bottom plate and do not adopt the guide rail, blocked dead problem easily when consequently having avoided the guide rail to adjust.

What has been described above is only the preferred embodiment of the present invention, not for limiting the scope of the present invention, but various changes can be made to the above-mentioned embodiment of the present invention. All the simple and equivalent changes and modifications made according to the claims and the content of the specification of the present invention fall within the scope of the claims of the present invention. The present invention is not described in detail in the conventional technical content.

Claims (10)

1. The utility model provides a position and angle adjustable static cutter assembly, its includes an adjustment mechanism (10) and installs static cutter (20) on this adjustment mechanism (10), its characterized in that, adjustment mechanism (10) are including lower plywood (112), and the rigid coupling has a plurality of bull's eye bearings (12) on lower plywood (112), a plurality of bull's eye bearings (12) top is equipped with one by its upper plate (111) that support.

2. The electrostatic cutter assembly according to claim 1, wherein the electrostatic cutter (20) comprises a cathode (21), a cutting plate C-shaped frame (22) and a cutting plate (23) mounted on the cutting plate C-shaped frame (22), and one or more cathode support columns (14) for fixing with the cathode (21) and one or more anode support columns (15) for fixing with the cutting plate C-shaped frame (22) are arranged on the upper surface of the upper plate (111).

3. An electrostatic cutter assembly according to claim 1, wherein one of the sides of the upper plate (111) is provided with two linearly moving mechanical transmission feeds (13) hingedly secured to the upper plate (111).

4. An electrostatic cutter assembly according to claim 3, wherein each mechanical transmission feed-in (13) comprises a connecting rod (131) and a hinge seat (132) hinged to one end of the connecting rod (131), and is fixed to the upper plate (111) by the hinge seat (132).

5. The electrostatic cutter assembly according to claim 4, wherein the connecting rods (131) are parallel to each other.

6. An electrostatic cutter assembly according to claim 4, further comprising a vacuum steel cylinder (30) for accommodating the adjustment mechanism (10) and the electrostatic cutter (20), the connecting rod (131) passing through the vacuum steel cylinder (30).

7. The electrostatic cutter assembly according to claim 6, wherein the bottom of the vacuum steel cylinder (30) is provided with a saddle (31), and the lower plate (112) is fixedly connected with the saddle (31).

8. The electrostatic cutter assembly according to claim 7, wherein the saddle (31) is provided with three-dimensional adjustment and locking mechanisms at each of the four corners.

9. The electrostatic cutter assembly of claim 1 wherein the lower plate (112) has a plurality of openings therein.

10. The electrostatic cutter assembly according to claim 1, wherein the bullseye bearings (12) are at least 6 in number and are uniform in size.

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