Electronic gun high-voltage plug fixing structure and electronic gun

Abstract

The invention discloses a fixing structure of a high-voltage plug of an electronic gun and the electronic gun. The fixing structure of the high-voltage plug of the electronic gun comprises a shell, the high-voltage plug, an adjusting block and an adjusting rod. A sealing cavity is formed in the shell, and an insertion hole extending to the sealing cavity is formed in the outer surface of the shell; the high-voltage plug is inserted into the insertion hole; the adjusting block is fixed on the high-voltage plug; a threaded hole is formed in the adjusting block, and the adjusting rod is screwed in the threaded hole and abuts against the shell after penetrating through the threaded hole; the shell is provided with a pressing part, the pressing part is used for applying pressure towards the shell to the adjusting block, and the pressing part is connected to the shell in an adjustable mode so that the pressure applied to the adjusting block by the pressing part can be changed when the pressing part is adjusted. The depth of the high-voltage plug inserted into the shell can be adjusted, and the influence on the high-voltage plug caused by the air pressure difference inside and outside the sealing cavity can be counteracted.

Description

Technical Field

[0001] The invention relates to the technical field of electron guns, and in particular to a fixing structure of a high-voltage plug of an electron gun and an electron gun. Background Art

[0002] The high-voltage plugs of existing electron guns are all fixed in specific positions and cannot be adjusted in height as needed, which makes it difficult for the electron guns to adapt to a variety of different working environments. In addition, the high-voltage plugs of some electron guns are encapsulated in a sealed chamber, and the insulation of the high-voltage plugs is achieved by the vacuum environment in the sealed chamber or by filling the sealed chamber with insulating gas. The high-voltage plugs are assembled on the shell of the sealed chamber by plugging. Specifically, a plug hole is set on the shell of the sealed chamber, and the high-voltage plug is inserted into the sealed chamber through the plug hole. The static friction between the outer peripheral surface of the high-voltage plug and the hole wall of the plug hole is used to keep the high-voltage plug and the shell fixed. However, when the high-voltage plug is placed in a vacuum sealed chamber, due to the pressure difference of 1 atmosphere between the sealed chamber and the external environment, the high-voltage plug will be subjected to the pressure from the outside. The pressure from atmospheric pressure causes the high-voltage plug to tend to move toward the inside of the sealed chamber. If the atmospheric pressure is greater than the static friction between the outer surface of the high-voltage plug and the wall of the plug-in hole, the high-voltage plug will move. When the high-voltage plug is insulated with insulating gas, in order to make the insulation meet the requirements, it is necessary to fill the sealed chamber with insulating gas of n atmospheres of pressure. In this way, n-1 pressure differences will be formed inside and outside the sealed chamber. This pressure difference will cause the high-voltage plug to tend to move toward the outside of the sealed chamber. When the pressure generated by the pressure difference is greater than the static friction between the outer surface of the high-voltage plug and the wall of the plug-in hole, the high-voltage plug will also move. Summary of the invention

[0003] In view of the deficiencies of the prior art, the first object of the present invention is to provide a fixing structure for a high-voltage plug of an electron gun, which can adjust the depth of the high-voltage plug inserted into the shell as needed, and at the same time offset the influence of the pressure difference between inside and outside of the sealed chamber on the high-voltage plug.

[0004] A second objective of the present invention is to provide an electron gun.

[0005] To achieve the above-mentioned purpose 1, the present invention adopts the following technical solution:

[0006] The fixing structure of the electron gun high-voltage plug comprises a housing, a high-voltage plug, an adjustment block, and an adjustment rod;

[0007] A sealed chamber is arranged inside the shell, and a plug hole extending to the sealed chamber is arranged on the outer surface of the shell; a part of the high-voltage plug is plugged into the plug hole and extends into the sealed chamber, and the other part is exposed outside the shell; the adjustment block is fixed to the part of the high-voltage plug exposed outside the shell;

[0008] The adjusting block is arranged opposite to the housing, and a threaded hole is arranged on the adjusting block, the adjusting rod is screwed into the threaded hole and abuts against the housing after passing through the threaded hole;

[0009] The shell is provided with a clamping portion located on the side of the adjusting block away from the shell. The clamping portion is used to apply pressure to the adjusting block toward the shell. The clamping portion is connected to the shell in an adjustable manner to change the pressure applied by the clamping portion on the adjusting block when the clamping portion is adjusted.

[0010] Preferably, the shell includes a side wall and an end wall connected to the top of the side wall, the sealed chamber is surrounded by the side wall and the end wall, and the plug hole is arranged on the end wall; the adjustment block includes a sleeve which is sleeved on the high-voltage plug and fixedly matched with the high-voltage plug, and a connecting disk formed by the top of the sleeve extending radially outward from the sleeve, and the connecting disk is located above the end wall and arranged opposite to the end wall.

[0011] Preferably, the threaded hole is arranged on the connecting plate, and the lower end surface of the adjusting rod abuts against the upper surface of the end wall.

[0012] Preferably, an adjusting bolt is threaded on the end wall, and a through hole is provided on the connecting plate for the adjusting bolt to pass through so that the adjusting bolt and the connecting plate can be movably matched, and the nut of the adjusting bolt is placed above the upper surface of the connecting plate to form a clamping portion.

[0013] Preferably, an elastic member is sleeved on the adjusting bolt, the elastic member is in a compressed state and two ends thereof abut against the upper surface of the connecting plate and the pressing portion respectively.

[0014] Preferably, the elastic member is a spring or an elastic rubber sleeve sleeved on the adjusting bolt.

[0015] Preferably, the high-voltage plug is provided with a support surface extending radially thereof, the lower end surface of the sleeve abuts against the support surface, a plurality of bolt holes are provided on the support surface, a plurality of fastening bolts extending from top to bottom are passed through the sleeve, the plurality of fastening bolts are screwed into the plurality of bolt holes one by one, and the nuts of the fastening bolts are pressed against the upper end surface of the sleeve.

[0016] Preferably, it comprises two or more adjusting rods evenly arranged along the circumference of the high voltage plug.

[0017] Preferably, it comprises more than two pressing parts evenly arranged along the axial direction of the high-voltage plug.

[0018] To achieve the above-mentioned second objective, the present invention adopts the following technical solution:

[0019] The electron gun comprises the fixing structure of the electron gun high voltage plug.

[0020] The beneficial effects of the present invention are:

[0021] In the present invention, by rotating the adjusting rod, the adjusting rod can drive the adjusting block to approach or move away from the shell, and then adjust the depth of the high-voltage plug inserted into the shell. The pressing part is placed on the side of the adjusting block away from the shell in an adjustable manner, and the force applied by the pressing part to the adjusting block can be changed by adjusting the pressing part. When the air pressure in the sealed chamber of the shell is greater than the air pressure of the external environment, the pressure of the pressing part on the adjusting block can be adjusted accordingly according to the difference in internal and external air pressures, so that the pressure can offset the pressure generated by the air pressure inside and outside the shell as much as possible, thereby preventing the high-voltage plug from moving relative to the shell. When the air pressure in the sealed chamber of the shell is lower than the air pressure of the external environment, since the adjusting rod and the adjusting block are fixed by threaded cooperation, the adjusting rod is pressed against the shell to ensure that the adjusting block will not move relative to the shell, so that the high-voltage plug remains fixed relative to the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is the installation schematic diagram of the present invention;

[0024] Figure 3 It is a cross-sectional view of the present invention. DETAILED DESCRIPTION

[0025] Below, in conjunction with the accompanying drawings and specific embodiments, the present invention is further described:

[0026] like Figure 1 , 23 is a fixing structure of a high-voltage plug of an electron gun according to an embodiment of the present invention, which includes a housing 10, a high-voltage plug 20, an adjustment block 30 and an adjustment rod 40. By rotating the adjustment rod 40, the relative position of the high-voltage plug 20 relative to the housing 10 is adjusted, and at the same time, the high-voltage plug 20 and the housing 10 are kept relatively fixed to avoid the movement of the high-voltage plug 20 caused by the pressure difference between the inside and outside of the housing 10. Specifically, a sealed chamber is provided inside the housing 10, and an insertion hole 122 extending to the sealed chamber is provided on the outer surface of the housing. A part of the high-voltage plug 20 is inserted into the insertion hole 122 and extends into the sealed chamber of the housing 10. The high-voltage plug 20 is encapsulated by a sealed chamber, and another part of the high-voltage plug 20 is exposed outside the housing 10. During assembly, the high-voltage plug 20 is inserted from the outside to the inside through the plug hole 122, so that at least a part of the high-voltage plug 20 is exposed outside the housing 20. The adjustment block 30 is fixed to the part of the high-voltage plug 20 exposed outside the housing 10. The adjustment block 30 and the high-voltage plug 20 can be assembled in advance to form a component, and then the high-voltage plug 20 is inserted into the sealed chamber of the housing 10 through the plug hole 122, or the adjustment block 30 and the high-voltage plug 20 are set as an integral structure. Since the adjustment block 30 The adjusting block 30 is fixed to the high-voltage plug 20. Therefore, by adjusting the distance between the adjusting block 30 and the housing 10, the position of the high-voltage plug 20 relative to the housing can be adjusted. Specifically, a threaded hole 321 is provided on the adjusting block 30. The adjusting rod 40 is screwed into the threaded hole 321 from the side of the adjusting block 30 away from the housing 10, and the adjusting rod 40 can be screwed into the threaded hole 321 and then pass through the end of the adjusting block 30 close to the housing 10. After passing through the threaded hole 321, the adjusting rod 40 abuts against the housing 10. A pressing portion 131 is also provided on the housing 10. The pressing portion 131 is placed at the side of the adjusting block 30 away from the housing 10. 0 and can apply pressure to the adjusting block 30 toward the housing 10. Since the adjusting block 30 is pressed on the side away from the housing 10, the adjusting rod 40 can move toward the housing 10 with the adjusting block 30, so that the adjusting rod 40 can be pressed on the housing 10 after passing through the threaded hole 321. When the adjusting rod 40 is rotated, the screw teeth on the outside of the adjusting rod 40 cooperate with the screw teeth in the threaded hole 321, so that the adjusting block 30 can be close to or away from the housing 10, and then the adjusting block 30 can drive the high-voltage plug 20 to move relative to the housing 10, so as to achieve the purpose of adjusting the position of the high-voltage plug 20. The pressing portion 131 is connected to the housing 10 in an adjustable manner. When the pressing portion 131 is adjusted, the size of the above-mentioned pressure applied by the pressing portion 131 to the adjusting block 30 can be changed.

[0027] In the present invention, by rotating the adjusting rod, the adjusting rod can drive the adjusting block to approach or move away from the shell, and then adjust the depth of the high-voltage plug inserted into the shell. The pressing part is placed on the side of the adjusting block away from the shell in an adjustable manner, and the force applied by the pressing part to the adjusting block can be changed by adjusting the pressing part. When the air pressure in the sealed chamber of the shell is greater than the air pressure of the external environment, the pressure of the pressing part on the adjusting block can be adjusted accordingly according to the difference in internal and external air pressures, so that the pressure can offset the pressure generated by the air pressure inside and outside the shell as much as possible, thereby preventing the high-voltage plug from moving relative to the shell. When the air pressure in the sealed chamber of the shell is lower than the air pressure of the external environment, since the adjusting rod and the adjusting block are fixed by threaded cooperation, the adjusting rod is pressed against the shell to ensure that the adjusting block will not move relative to the shell, so that the high-voltage plug remains fixed relative to the shell.

[0028] In a preferred embodiment, the housing 10 may be configured as a columnar structure, which includes a cylindrical side wall 11 and an end wall 12 connected to the top of the side wall 11. The sealed chamber is surrounded by the side wall 11 and the end wall 12. The plug hole 122 is provided on the end wall 12, so that the plug hole 12 extends from the outer surface of the end wall 12 to the sealed chamber, and the extension direction of the plug hole 12 is consistent with the axial direction of the housing 10. In this way, after the high-voltage plug 20 is inserted into the plug hole 122, the axial direction of the high-voltage plug 20 will be consistent with the axial direction of the housing 10, and the adjustment The block 30 includes a sleeve 31 and a connecting plate 32. The sleeve 31 is sleeved on the high-voltage plug 20 and can be fixed to the high-voltage plug 20 by tight fit or bolt fixation. The connecting plate 32 is formed by the top end of the sleeve 31 extending radially outward from the sleeve 31. By providing a circle of connecting plates 32 protruding from the outer periphery of the sleeve 31, the connecting plates 32 are located above the end wall 12 and are arranged opposite to the end wall 12, so that the connecting plates 32 can be used to adapt to the installation of the above-mentioned adjustment rod 40 and the clamping part 131. For example, a threaded hole 321 can be opened on the connecting plate 32, and the threaded hole 321 extends from the upper surface of the connecting plate 32 to the lower surface. The adjusting rod 40 passes through the threaded hole 32 from top to bottom. After the adjusting rod 40 is screwed with the threaded hole 32, the lower end face of the adjusting rod 40 abuts against the upper surface 121 of the end wall 12.

[0029] An adjusting bolt 13 is screwed on the end wall 12, and the extending direction of the adjusting bolt 13 is consistent with the axial direction of the housing 10. A through hole 322 is provided on the connecting plate 32 for the adjusting bolt 13 to pass through. The adjusting bolt 13 can be provided with an external thread only at its lower part, and the other part is a smooth rod. A bolt hole 123 is provided on the upper surface of the end wall 12. After the adjusting bolt 13 passes through the through hole 322 from top to bottom, the lower part of the adjusting bolt 13 is extended into the bolt hole 123 and then screwed in the bolt hole 123. The smooth rod part of the adjusting bolt 13 is movably connected in the through hole 322, and the nut of the adjusting bolt 13 is placed above the upper surface 323 of the connecting plate 32 and pressed on the upper surface 323. The nut of the adjusting bolt 13 forms the above-mentioned clamping part 131, and the smooth rod of the adjusting bolt 13 cooperates with the through hole 322 on the connecting plate 32, so that the adjusting bolt 13 is movable with the adjusting block 30. In this way, The adjusting bolt 13 is adjustably connected to the end wall 12. By rotating the adjusting bolt 13, the pressing part 131 moves closer to or away from the shell 10 along the axial direction of the shell 10, and then changes the pressure applied by the pressing part 131 to the upper surface 323 of the connecting plate 32. For example, when the high-voltage plug 20 is insulated by insulating gas in the sealed chamber of the shell 10, the sealed chamber needs to be filled with insulating gas. Generally, the pressure of the insulating gas in the sealed chamber is relatively large. At this time, the adjusting bolt 13 can be tightened to increase the pressure applied by the pressing part 131 to the upper surface 323. On the contrary, when the pressure in the sealed chamber is small, the adjusting bolt 13 can be loosened to a certain extent to appropriately reduce the pressure applied by the pressing part 131 to the upper surface 323. In short, the pressure applied by the pressing part 131 to the upper surface 323 can offset the internal and external pressure difference of the sealed chamber as much as possible. The adjusting bolt 13 can be rotated by a torque wrench to more accurately adjust the pressure applied by the above-mentioned pressing part 131 to the upper surface 323 to an appropriate size. Of course, in other embodiments, an elastic member may be provided between the clamping portion 131 and the upper surface 323 of the connecting disk 32, the elastic member is in a compressed state and its two ends respectively abut against the upper surface 323 of the connecting disk 32 and the clamping portion 131, the elastic member is pressurized by the clamping portion 131, and the upper surface 323 of the connecting disk 32 is pressurized by the elastic member, so that the compression amount of the elastic member can more intuitively reflect the magnitude of the downward pressure exerted on the connecting disk 32. For example, a spring 50 is used as the elastic member, the spring 50 is sleeved on the adjusting bolt 13, and the upper end of the spring 50 abuts against the clamping portion 131, and the lower end of the spring 50 abuts against the upper surface 323. When the adjusting bolt 13 is rotated, the compression amount of the spring 50 can be changed. A large compression amount of the spring 50 indicates a large pressure applied to the upper surface 323, and vice versa. In other embodiments, the spring 50 may also be replaced by an elastic rubber sleeve or other elastic components sleeved on the adjusting bolt 13 .By setting the spring 50, after the adjusting rod 40 is rotated to move the adjusting block 30 toward the shell 10 for a certain distance, the elastic stress of the spring 50 can press the adjusting block 30 so that the adjusting rod 40 is still against the shell 10, so that there is no need to tighten the adjusting bolt 13. When the elastic stress generated by the spring 50 is not enough to offset the internal and external pressure difference, the adjusting bolt 13 is adjusted.

[0030] There are more than two adjustment rods 40 evenly arranged in the circumference of the high-voltage plug 20. When adjusting the height position of the high-voltage plug 20, the more than two adjustment rods 40 can be rotated respectively, so that different positions of the adjustment block 30 can be moved up and down synchronously, so as to avoid the high-voltage plug 20 from swinging when adjusting the height position of the high-voltage plug 20, so as to avoid the leakage of the high-voltage plug 20 due to the swing of the high-voltage plug 20 at the matching position of the high-voltage plug 20 and the inner wall of the plug hole 12. Preferably, the present invention can be arranged in the circumference of the high-voltage plug 20. There are more than two above-mentioned adjustment bolts 13 evenly arranged in the circumference of the high-voltage plug 20, so that more than two pressing parts 131 are evenly arranged in the circumference of the high-voltage plug 20, so that the adjustment block 30 can be evenly stressed in the circumference. Preferably, three adjustment bolts 13 can be arranged in the circumference of the high-voltage plug 20 to form three pressing parts 131.

[0031] It should be noted that the clamping portion 131 of the present invention is not necessarily formed by the nut of the above-mentioned adjusting bolt 13. In other embodiments, the clamping portion 131 can be connected to the shell 10 in other adjustable ways. In short, as long as the clamping portion 131 can be close to the shell 10 or away from the shell 10 to change the degree of clamping on the adjusting block 30, it will be fine.

[0032] In the present invention, the high-voltage plug 20 is fixed to the adjusting block 30 by bolt connection. Specifically, the high-voltage plug 20 is provided with a supporting surface 21 extending along its radial direction. The high-voltage plug 20 can be set as two parts with different thicknesses. The position where the two parts with different thicknesses are connected constitutes a step position to form the supporting surface 21. The lower end surface of the sleeve 31 abuts against the supporting surface 21. The supporting surface 21 is provided with a plurality of bolt holes 22 that are recessed downward. The sleeve 31 is penetrated with a plurality of fastening bolts 33 extending from top to bottom. After passing through the lower end surface of the sleeve 31, the plurality of fastening bolts 33 are screwed into the plurality of bolt holes 22 one by one. The fastening bolts 33 are tightened, and the nuts of the fastening bolts 33 are used to press the upper end surface of the sleeve 31, so that the sleeve 31 and the high-voltage plug 20 are fixedly connected together, and then the adjusting block 30 and the high-voltage plug 20 are fixedly connected. In other embodiments, the high-voltage plug 20 and the adjustment block 30 may be fixedly connected together by bolts along the radial direction of the cross bar sleeve 31 and the high-voltage plug 20 .

[0033] The electron gun of the present invention includes the above-mentioned fixing structure of the electron gun high voltage plug, and the other structures of the electron gun are the same as those in the prior art and will not be described in detail here.

[0034] The above description is only a preferred embodiment of the present invention, which is a further detailed description of the present invention in combination with a specific preferred embodiment, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. The fixing structure of the electron gun high voltage plug is characterized in that: It includes a housing, a high-voltage plug, an adjustment block, and an adjustment rod; A sealed chamber is arranged inside the shell, and a plug hole extending to the sealed chamber is arranged on the outer surface of the shell; a part of the high-voltage plug is plugged into the plug hole and extends into the sealed chamber, and the other part is exposed outside the shell; the adjustment block is fixed to the part of the high-voltage plug exposed outside the shell; The adjusting block is arranged opposite to the housing, and a threaded hole is arranged on the adjusting block, the adjusting rod is screwed into the threaded hole and abuts against the housing after passing through the threaded hole; The shell is provided with a clamping portion located on the side of the adjusting block away from the shell. The clamping portion is used to apply pressure to the adjusting block toward the shell. The clamping portion is connected to the shell in an adjustable manner to change the pressure applied by the clamping portion on the adjusting block when the clamping portion is adjusted.

2. The fixing structure of the electron gun high voltage plug according to claim 1, characterized in that: The shell includes a side wall and an end wall connected to the top of the side wall, the sealed chamber is surrounded by the side wall and the end wall, and the plug hole is arranged on the end wall; the adjustment block includes a sleeve which is sleeved on the high-voltage plug and fixedly matched with the high-voltage plug, and a connecting disk formed by the top of the sleeve extending radially outward from the sleeve, and the connecting disk is located above the end wall and arranged opposite to the end wall.

3. The fixing structure of the electron gun high voltage plug according to claim 2, characterized in that: The threaded hole is arranged on the connecting plate, and the lower end surface of the adjusting rod abuts against the upper surface of the end wall.

4. The fixing structure of the electron gun high voltage plug according to claim 2, characterized in that: An adjusting bolt is threaded on the end wall, and a through hole is provided on the connecting plate for the adjusting bolt to pass through so that the adjusting bolt and the connecting plate can be movably matched. The nut of the adjusting bolt is placed above the upper surface of the connecting plate to form a clamping portion.

5. The fixing structure of the electron gun high voltage plug according to claim 4, characterized in that: An elastic member is sleeved on the adjusting bolt, the elastic member is in a compressed state and two ends thereof are respectively pressed against the upper surface of the connecting plate and the pressing portion.

6. The fixing structure of the electron gun high voltage plug according to claim 5, characterized in that: The elastic member is a spring or an elastic rubber sleeve sleeved on the adjusting bolt.

7. The fixing structure of the electron gun high voltage plug according to claim 2, characterized in that: The high-voltage plug is provided with a support surface extending along its radial direction, the lower end surface of the sleeve is pressed against the support surface, a plurality of bolt holes are provided on the support surface, a plurality of fastening bolts extending from top to bottom are passed through the sleeve, the plurality of fastening bolts are screwed into the plurality of bolt holes one by one, and the nuts of the fastening bolts are pressed against the upper end surface of the sleeve.

8. The fixing structure of the electron gun high voltage plug according to any one of claims 1 to 7, characterized in that: It comprises more than two adjusting rods which are evenly arranged along the circumference of the high-voltage plug.

9. The fixing structure of the electron gun high voltage plug according to any one of claims 1 to 7, characterized in that: It comprises more than two pressing parts which are evenly arranged along the axial direction of the high-voltage plug.

10. An electron gun, characterized in that A fixing structure for an electron gun high voltage plug comprising any one of items 1-9.

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