CN203264066U - Pull rod device for gamma knife - Google Patents

Abstract

The utility model relates to the technical field of the gamma knife, in particular to a pull rod device of the gamma knife, comprising a front pull rod, a pull rod sleeve, a rear pull rod, a handle, a shielding block of a source loading machine, a left pressing block, a right pressing block and a shielding ball , wherein: the inner surfaces of the left pressing block and the right pressing block are both hemispherical inner cavities, which form a spherical cavity with the shape and size corresponding to the shielding ball after being closed, for installing the shielding ball; there is a through hole in the middle of the shielding ball , the front pull rod passes through the pull rod sleeve and the through hole of the shielding ball in turn to connect with the rear pull rod; the left pressing block is connected to the shielding block of the source loading machine through a fixing piece. The pull rod device of the gamma knife disclosed by the utility model can increase the working space by adding a set of shielding ball structure, and control the pull rod from different angles and directions, and at the same time, can better meet the requirements of the radiation shielding function.

Description

Pull rod device of Gamma Knife

technical field

The utility model relates to the technical field of the gamma knife, in particular to a pull rod device of the gamma knife. the

Background technique

The existing Gamma Knife source loading machine has a radioactive source in it. When loading or taking out the radioactive source, the operator usually uses a pull rod device to pull out the shielding plug in the source loading machine, and installs the Gamma Knife through the manipulator. The source and source work, and then push in the shielding plug through the pull rod device to seal the source opening. When taking the source, some radioactive source casings are installed with too much elastic force, and the pull-out force of the manipulator is not enough. The shell is pulled out. the

However, the existing pull rod device is a linear pull rod device, which can only realize the push-pull function in one straight direction, and the working space range is limited. When the shielding plug is pushed to seal the source opening, the direction of the force cannot be changed. If the shielding plug does not have When it is completely facing the source opening, the shielding plug cannot be pushed in place, which is inconvenient and flexible during operation; moreover, multiple radioactive sources are installed in the existing gamma knife, arranged in a three-dimensional space area, and the manipulator The source needs to be installed and taken from multiple directions. When the pull-out force of the manipulator is not enough to pull out the cobalt source casing, the existing pull rod device often cannot hook the claw of the manipulator, and cannot give the claw of the manipulator an auxiliary pulling force. , to solve the problem of source difficulty. the

Utility model content

The purpose of the utility model is to provide a gamma knife pull rod device to solve the technical problem of difficult source extraction in the prior art. the

The utility model is realized in this way, a pull rod device of a gamma knife, comprising a front pull rod, a pull rod sleeve, a rear pull rod, a handle and a shielding block of a source loading machine, characterized in that the pull rod device also includes a left pressing block, The right pressing block and the shielding ball, wherein: the inner surfaces of the left pressing block and the right pressing block are hemispherical inner cavities, which form a spherical cavity with a shape and size corresponding to the shielding ball after being closed, for use in Install the shielding ball; there is a through hole in the middle of the shielding ball, and the front pull rod passes through the pull rod sleeve and the through hole of the shielding ball in turn to connect with the rear pull rod; and the left pressure The block is connected to the shielding block of the source loading machine through a fixing piece.

Preferably, the pull rod sleeve has a trumpet-shaped tapered hole, the cross-sectional diameter of the side close to the left pressure block is smaller than the cross-sectional diameter of the other side, and the front pull rod passes through the pull rod sleeve in sequence The trumpet-shaped tapered hole of the shielding ball and the through hole of the shielding ball are connected with the rear pull rod. the

Preferably, the front pull rod is connected to the rear pull rod through threaded connection. the

Preferably, the front pull rod and the rear pull rod are the same pull rod that cannot be separated. the

Preferably, the taper of the trumpet-shaped tapered hole of the tie rod sleeve is 7 degrees. the

Preferably, the fitting gap between the shielding ball and the inner surfaces of the left pressing block and the right pressing block is 0.01mm. the

Preferably, the shielding ball is made of tungsten alloy. the

Preferably, the matching gap between the front tie rod and the through hole of the shielding ball is 0.01mm. the

Preferably, the fixing member is a screw or a bolt. the

The pull rod device of the gamma knife disclosed by the utility model can increase the working space by adding a set of shielding ball structure and changing the stepped hole structure of the existing pull rod sleeve into a trumpet-shaped tapered hole structure. The direction is used to control the pull rod, and at the same time, it can better meet the requirements of the radiation shielding function. the

Description of drawings

Fig. 1 is a structural schematic diagram of a pull rod device of an existing gamma knife. the

Fig. 2 is a schematic structural diagram of the pull rod device of the gamma knife provided by the embodiment of the present invention. the

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model. the

Fig. 1 is a structural schematic diagram of a pull rod device of an existing gamma knife. As shown in Figure 1, the pull rod device of the existing gamma knife comprises: front pull rod 2, pull rod sleeve 3, rear pull rod 4, handle 5 and source machine shielding block 6, wherein, the source machine shield block 6 is opened with A stepped hole, the pull rod sleeve 3 is installed in the stepped hole of the shielding block 6 of the source loading machine, and is fixed by the nut 1 . The inner hole of the pull rod sleeve 3 is also a stepped hole, and the front pull rod 2 is installed in the pull rod sleeve 3 and closely fits with the pull rod sleeve 3 . The front tie rod 2 is a stepped shaft, and the smaller end of the front tie rod 2 is screwed and connected with one end of the back tie rod 4 through threads, and the other end of the back tie rod 4 is connected to the handle 5 . the

When installing or removing the source of the Gamma Knife, the operator controls the pull rod device to push in or pull out the shielding plug in the source loading machine through the handle 5. Since the pull rod device can only realize the push-pull function in a straight line, the working space range Limited, when the shielding plug is pushed to seal the source port, the direction of the force cannot be changed. If the shielding plug is not completely facing the source port, the shielding plug cannot be pushed in place, which is inconvenient and flexible during operation; and , multiple radioactive sources are installed in the existing Gamma Knife, and they are arranged in a three-dimensional space area. The manipulator needs to load and take the source from multiple directions. When the pulling force of the manipulator is not enough, the cobalt source casing cannot be pulled out. At the same time, the pull bar device often cannot hook the claw of the manipulator, and cannot give an auxiliary pulling force to the claw of the manipulator to solve the problem of difficult source extraction. the

The pull rod device of the gamma knife provided by the utility model can increase the working space by adding a set of shielding ball structure and changing the stepped hole structure of the existing pull rod sleeve into a trumpet-shaped tapered hole structure. The direction is used to control the pull rod, and at the same time, it can better meet the requirements of the radiation shielding function. the

Fig. 2 is a schematic structural diagram of the pull rod device of the gamma knife provided by the embodiment of the present invention. As shown in Figure 2, the pull rod device of the gamma knife includes: a front pull rod 2', a pull rod sleeve 3', a rear pull rod 4', a handle 5, a shielding block 6' of the loading machine, a left pressing block 7, and a right pressing block 8 , shielding ball 9 and fixing piece (screw) 10. the

The front tie rod 2' is connected to the rear tie rod 4', preferably, the front tie rod 2' is connected with the rear tie rod 4' by threaded connection, so as to facilitate disassembly. Rear pull rod 4 ' is connected with handle 5, and when using pull rod device, operator controls rear pull rod 4 ' and front pull rod 2 ' through handle 5. The pull rod sleeve 3' has a trumpet-shaped tapered hole 11, and the cross-sectional diameter near the left pressing block 7 is smaller than the cross-sectional diameter of the other side, that is, the front end of the trumpet-shaped tapered hole 11 (near the end of the front tie rod 2' ) is large, and the rear end (the end near the rear tie rod 4 ') is small. The taper of the trumpet-shaped tapered hole 11 is greater than 0 degrees. In a preferred embodiment, the taper of the trumpet-shaped tapered hole 11 is 7 degrees. the

The left pressing block 7, the right pressing block 8 and the shielding ball 9 form a set of shielding ball members. The inner surfaces of the left pressing block 7 and the right pressing block 8 are hemispherical inner cavities, and form a shape, size and shielding ball 9 after being closed. The corresponding spherical cavity is used to install the shielding ball 9 with a through hole in the middle. In order to meet the national radiation safety requirements, the fit gap between the shielding ball 9 and the inner surfaces of the left pressure block 7 and the right pressure block 8 must be less than 1 mm. When the fit gap is 0.01 mm, the shielding effect is better, and the radiation received by the operator Doses are smaller. The shielding ball 9 is made of metal material, such as steel, lead alloy, tungsten alloy, etc. The shielding effect is the best when the shielding ball 9 is made of tungsten alloy. The left pressing block 7 is connected to the shielding block 6' of the source loading machine through a fixing piece 10. Preferably, the fixing piece 10 is a screw or a bolt-like component. The front tie rod 2' passes through the trumpet-shaped tapered hole 11 of the pull rod sleeve 3' and the through hole of the shielding ball 9 to be connected with the rear tie rod 4', and the front tie rod 2' and the through hole of the shielding ball 9 have a matching gap, which In a preferred embodiment, the fit clearance is 0.01mm. the

When the operator operates the pull rod device, the shielding ball 9 rotates in the spherical cavity formed by the left pressure block 7 and the right pressure block 8, driving the front pull rod 2' to swing up and down in the horn-shaped tapered hole 11, and at the same time, the front pull rod 2 'can expand and contract in the shielding ball 9, and can change the direction and position of the push and pull force of the front tie rod 2', thus increasing the working space range of the front tie rod 2' and the rear tie rod 4'. When the shielding plug is not completely facing the source hole, the shielding plug can be easily pulled out and pushed in by changing the thrust direction of the front pull rod 2' and the rear pull rod 4'. In addition, when the manipulator picks up the source at any position and direction, the front pull rod 2' can be hooked to the claw of the manipulator, giving the manipulator an auxiliary pulling force to pull out the source cladding. the

In this embodiment, for the convenience of disassembly and transportation, the front tie rod 2' and the rear tie rod 4' are two connected parts. Those skilled in the art should know that the front tie rod 2' and the rear tie rod 4' can also be designed as The same drawbar that cannot be separated. In addition, those skilled in the art should know that the taper of the trumpet-shaped tapered hole 11 is not limited to 7 degrees. the

Using the pull rod device of the gamma knife provided by the utility model can change the direction and position of the push and pull force of the pull rod, and easily pull out and push the shielding plug into the loading port. In addition, it can help the manipulator in different The source is taken in the angular direction, the working space area is large, and the source can be taken out conveniently, thereby reducing the operating time of the operator and greatly reducing the radiation dose absorbed by the operator. the

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models. the

Claims (9)

1. the pull rod device of a gamma knife, comprise front tension bar, pull bar sleeve, back stay, handle and source loading machine shielding slab, it is characterized in that, described pull rod device also comprises left briquetting, right briquetting and shielding ball, wherein:

The inner surface of described left briquetting and described right briquetting is the hemispherical inner chamber, closes up shape of rear formation, size and the corresponding spherical hollow space of described shielding ball, is used for installing described shielding ball; Have a through hole in the middle of described shielding ball, the through hole that described front tension bar passes described pull bar sleeve and described shielding ball successively is connected with described back stay; And described left briquetting is connected on described source loading machine shielding slab by fixture.

2. the pull rod device of gamma knife as claimed in claim 1, it is characterized in that: described pull bar sleeve has a tubaeform taper hole, near the cross-sectional diameter of the described left briquetting one side cross-sectional diameter less than opposite side, described front tension bar is to pass successively the tubaeform taper hole of described pull bar sleeve and the through hole of described shielding ball is connected with described back stay.

3. the pull rod device of gamma knife as claimed in claim 1 or 2, it is characterized in that: described front tension bar is to be threaded connection mode to be connected with described back stay.

4. the pull rod device of gamma knife as claimed in claim 1 or 2, it is characterized in that: described front tension bar and described back stay are indissociable same pull bars.

5. the pull rod device of gamma knife as claimed in claim 2 is characterized in that: the tapering of the tubaeform taper hole of described pull bar sleeve is 7 degree.

6. the pull rod device of gamma knife as claimed in claim 1 or 2, it is characterized in that: the fit clearance between described shielding ball and described left briquetting and described right briquetting inner surface is 0.01mm.

7. the pull rod device of gamma knife as claimed in claim 1 or 2, it is characterized in that: described shielding ball is to make with tungsten alloy.

8. the pull rod device of gamma knife as claimed in claim 1 or 2, it is characterized in that: the fit clearance of the through hole of described front tension bar and described shielding ball is 0.01mm.

9. the pull rod device of gamma knife as claimed in claim 1 or 2, it is characterized in that: described fixture is screw class or bolt base part.

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