Dual-indium-seal tube

Abstract

The utility model discloses a kind of image tube double indium seal equipment suitable for being assembled on indium seal cavity, including sealing element, the pressure head of loose pressure movement, the loose pressure driving mechanism for driving pressure head to move and the elastic element between pressure head and loose pressure driving mechanism is equipped with.Loose pressure driving mechanism is at least partially located outside indium seal cavity, and loose pressure driving mechanism is assembled on indium seal cavity.Pressure head is at least partially located in indium seal cavity, and sealing element is connected on both pressure head and indium seal cavity;Or, sealing element is connected on loose pressure driving mechanism and indium seal cavity.Elastic element drives pressure head to move along the crimping direction of the pressure head relative to loose pressure driving mechanism.The utility model's image tube double indium seal equipment can change the force acting on indium seal surface into flexible force when loose pressure driving mechanism drives pressure head to carry out pressure sealing to the image tube to be sealed, prevent overshoot and crush indium seal surface in the image tube to be sealed, to improve the reliability of image tube indium seal.

Description

Technical Field

[0001] This utility model relates to the technical field of image tube manufacturing, and in particular to an image tube double indium sealing device. Background Technology

[0002] An image tube, also known as an image intensifier, is a vacuum optoelectronic device that uses the photoelectric effect to convert weak light signals into visible light images. It is a type of low-light detector.

[0003] The image tube consists of a housing, a photocathode, and a phosphor screen, with the housing located between the photocathode and the phosphor screen. To ensure the image tube's airtightness, sealing is required at the assembly points between the housing and the photocathode, and between the housing and the phosphor screen; therefore, the use of an indium sealing mechanism is essential.

[0004] Currently, for example, in a thermal indium sealing device disclosed in Chinese patent application number 201210563583.X, due to the driven lifting mechanism driving the shell assembly to make hard contact with the cathode window, the indium cover between the shell assembly and the cathode tube is crushed due to overshoot.

[0005] Therefore, there is an urgent need for a tube-based dual indium sealing device to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of this invention is to provide a double indium sealing device for image tubes that prevents damage to the indium cover in the image tube to be sealed due to overshoot.

[0007] To achieve the above objectives, the image tube double indium sealing device of this utility model is suitable for assembly on an indium sealing cavity, including a sealing element, a pressure head capable of pressure release and movement, a pressure release drive mechanism for driving the pressure head to move, and an elastic element disposed between the pressure head and the pressure release drive mechanism. The elastic element drives the pressure head to move relative to the pressure release drive mechanism along the pressing direction of the pressure head. The pressure release drive mechanism is at least partially located outside the indium sealing cavity and is assembled on the indium sealing cavity. The pressure head is at least partially located inside the indium sealing cavity, and the sealing element is connected to both the pressure head and the indium sealing cavity; or, the sealing element is connected to both the pressure release drive mechanism and the indium sealing cavity.

[0008] Compared with the prior art, by using an elastic element located between the pressure head and the pressure release drive mechanism and driving the pressure head to move relative to the pressure release drive mechanism along the pressing direction of the pressure head, when the pressure head contacts the image tube under the drive of the pressure release drive mechanism, the image tube pushes the pressure head back to make a buffered movement. This can transform the force acting on the indium cover into a flexible force, preventing overshoot and damage to the indium cover in the image tube to be sealed, thus improving the reliability of the indium seal of the image tube.

[0009] Preferably, the elastic element is located outside the indium sealing cavity.

[0010] Preferably, the image tube double indium sealing device of this invention further includes a pressure sensor located outside the indium sealing cavity and disposed between the pressure head and the elastic element.

[0011] Preferably, the sealing element is a bellows located within the indium sealing cavity, with a first end of the bellows being sealed to the indium sealing cavity in a sealed assembly connection, and the pressure head extending from the opposite second end of the bellows along the internal space of the bellows, the pressure head also being sealed to the second end of the bellows in a sealed assembly connection.

[0012] Preferably, the image tube double indium sealing device of this utility model further includes a guide sleeve located inside the bellows for guiding the movement of the pressure head. The guide sleeve is fixed on the indium sealing cavity and is also sleeved on the pressure head.

[0013] Preferably, the image tube double indium sealing equipment of this utility model further includes a tooling fixture for supporting the image tube to be sealed, the tooling fixture being located in the indium sealing cavity, and the tooling fixture being arranged opposite to the pressure head.

[0014] Preferably, the image tube double indium sealing device of this utility model further includes a first sleeve and a second sleeve located between the pressure release driving mechanism and the pressure head. The first sleeve is mounted on the pressure release driving mechanism, and the second sleeve is mounted on the pressure head. The opening of the second sleeve and the opening of the first sleeve face each other. The first end of the elastic member is inserted into the first sleeve from the opening of the first sleeve and abuts against the first sleeve. The second end of the elastic member is inserted into the second sleeve from the opening of the second sleeve and abuts against the second sleeve.

[0015] Preferably, the image tube double indium sealing device of this utility model further includes a limiting connecting sleeve that is simultaneously fitted onto both the first sleeve and the second sleeve. The limiting connecting sleeve restricts the range of movement of the second sleeve relative to the first sleeve along the pressing direction of the pressure head under the drive of the elastic member.

[0016] Preferably, the pressure release drive mechanism includes a lead screw, a nut threadedly connected to the lead screw, and a mechanism frame located outside the indium sealing cavity, the mechanism frame being assembled on the indium sealing cavity; the lead screw is rotatably assembled on the mechanism frame, and a rolling bearing is assembled between the nut and the first sleeve; or, the nut is fixed to the mechanism frame, a rolling bearing is assembled between the lead screw and the first sleeve, and the rolling bearing between the lead screw and the first sleeve is located inside the limiting connecting sleeve.

[0017] Preferably, the pressure release drive mechanism further includes a rotary driver, a movable seat for mounting the rotary driver, and a plurality of guide rods disposed between the movable seat and the mechanism frame and spaced apart from each other, with the lead screw located between the guide rods. Attached Figure Description

[0018] Figure 1 This is an internal diagram of the image tube double indium sealing device of this utility model, which is assembled in the indium sealing cavity and pressure seals the image tube.

[0019] Figure 2 This is an internal view of the lead screw, rolling bearing, elastic element, pressure sensor, first sleeve, second sleeve and limiting connecting sleeve assembled together in the image tube double indium sealing device of this utility model. Detailed Implementation

[0020] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0021] Please see Figure 1 The image tube double indium sealing device 100 of this utility model is suitable for assembly on the indium sealing cavity 200, and is used to pressure seal the image tube 300 assembled in the indium sealing cavity 200, thereby achieving the indium sealing purpose of the image tube 300.

[0022] The image tube double indium sealing device 100 of this utility model includes a sealing element 10, a pressure head 20 capable of pressure release and movement, a pressure release drive mechanism 30 for driving the pressure head 20 to move, and an elastic element 40 disposed between the pressure head 20 and the pressure release drive mechanism 30. The elastic element 40 drives the pressure head 20 to move relative to the pressure release drive mechanism 30 along the pressing direction of the pressure head 20 (see the direction indicated by arrow A), so that when the pressure head 20 contacts the image tube 300 assembled inside the indium sealing cavity 200, it is pushed back by the image tube 300, thereby moving within a certain range relative to the pressure release drive mechanism 30 in the opposite direction indicated by arrow A. Therefore, the pressure sealing of the image tube 300 by the pressure head 20 has a buffering flexible function; optionally, in... Figure 1 In this example, the elastic element 40 is located outside the indium-sealed cavity 200 to avoid the influence of the high temperature inside the indium-sealed cavity 200 on the elastic element 40. Alternatively, the elastic element 40 may be a metal compression spring, but is not limited to this.

[0023] The entire pressure release drive mechanism 30 is located outside the indium-sealed cavity 200. Obviously, depending on actual needs, a portion of the pressure release drive mechanism 30 can also be located outside the indium-sealed cavity 200. Therefore, it is not considered... Figure 1 As shown in the figure; the pressure release drive mechanism 30 is assembled on the indium-sealed cavity 200, and the indium-sealed cavity 200 provides the assembly space and support for the pressure release drive mechanism 30.

[0024] The pressure head 20 is partially located inside the indium-sealed cavity 200. Obviously, depending on actual needs, the entire pressure head 20 can also be located inside the indium-sealed cavity 200. When the entire pressure head 20 is located inside the indium-sealed cavity 200, a portion of the pressure release drive mechanism 30 is located inside the indium-sealed cavity 200 to meet the assembly connection requirements between the pressure release drive mechanism 30 and the pressure head 20. Similarly, when a portion of the pressure head 20 is located outside the indium-sealed cavity 200, the entire pressure release drive mechanism 30 can be located outside the indium-sealed cavity 200.

[0025] The sealing element 10 is connected to both the pressure head 20 and the indium sealing cavity 200 to ensure that the indium sealing cavity 200 is in a vacuum environment. Obviously, depending on actual needs, the sealing element 10 can also be connected to the pressure release drive mechanism 30 and the indium sealing cavity 200, which will also ensure that the indium sealing cavity 200 is in a vacuum environment. Therefore, it is not necessary to... Figure 1 The above is a limited list; alternatively, it may be used in [the following context]. Figure 1 In this example, the seal 10 is a bellows located within the indium sealing cavity 200, that is, Figure 1 The reference numeral 10 also indicates a bellows. The first end 11 of the bellows 10 is sealed to the indium-sealed cavity 200 in a sealed assembly connection (e.g., but not limited to, a welded seal). The pressure head 20 extends from the opposite second end 12 of the bellows 10 along the internal space 13. The pressure head 20 is also sealed to the second end 12 of the bellows 10 in a sealed assembly connection (e.g., but not limited to, a welded seal). Therefore, the indium-sealed cavity 200 and the pressure head 20 are sealed by the sealing element 10, thus simplifying the sealing fit structure between the sealing element 10 and the indium-sealed cavity 200 and the pressure head 20, respectively. More specifically, see the description below.

[0026] like Figure 1 and Figure 2 As shown, as an example, the image tube double indium sealing device 100 of this utility model also includes a pressure sensor 50 located outside the indium sealing cavity 200. The pressure sensor 50 is located between the pressure head 20 and the elastic element 40. The pressure sensor 50 collects the pressure value of the pressure head 20 acting on the assembled image tube 300 inside the indium sealing cavity 200 and feeds back the pressure value. Therefore, the pressure sensor 50 can be used to control the pressing force. For example, when the feedback pressure value is greater than the set pressure value, the pressure release drive mechanism 30 drives the pressure head 20 to move in the direction of loosening (i.e., the opposite direction indicated by arrow A) for fine adjustment. When the feedback pressure value is less than the set pressure value, the pressure release drive mechanism 30 drives the pressure head 20 to move in the direction of applying pressure (i.e., the direction indicated by arrow A) for fine adjustment.

[0027] like Figure 1As shown, as an example, the image tube double indium sealing device 100 of this utility model also includes a guide sleeve 60 located inside the bellows 10 for guiding the movement of the pressure head 20, and a tooling fixture 60' for supporting the image tube 300 to be sealed. The guide sleeve 60 is fixed on the indium sealing cavity 200, and the indium sealing cavity 200 provides support for the guide sleeve 60. The guide sleeve 60 is also sleeved on the pressure head 20, thus the pressure release and movement of the pressure head 20 is more stable and smoother with the help of the guide sleeve 60. Optionally, as an example, the guide sleeve 60 is a copper sleeve, so that the guide sleeve 60 has better mechanical properties, corrosion resistance and cutting performance. The tooling fixture 60' is located inside the indium sealing cavity 200, and the tooling fixture 60' is also arranged opposite to the pressure head 20. It is understood that, according to actual needs, the image tube double indium sealing device 100 of this utility model can also be designed without the tooling fixture 60'.

[0028] like Figure 1 and Figure 2 As shown, as an example, the image tube double indium sealing device 100 of this utility model further includes a first sleeve 70 and a second sleeve 80. The first sleeve 70 is located between the pressure release drive mechanism 30 and the pressure head 20, and is mounted on the pressure release drive mechanism 30. The second sleeve 80 is located between the pressure release drive mechanism 30 and the pressure head 20, and is mounted on the pressure head 20, with the opening 81 of the second sleeve 80 facing each other. At this time, the first end 41 of the elastic member 40 is inserted into the first sleeve 70 through the opening 71 of the first sleeve 70, and the first end 41 of the elastic member 40 also abuts against the first sleeve 70; the second end 42 of the elastic member 40 is inserted into the second sleeve 80 through the opening 81 of the second sleeve 80, and the second end 42 of the elastic member 40 also abuts against the second sleeve 80. Therefore, by means of the first sleeve 70 and the second sleeve 80, the elastic element 40 is more reliably positioned between the pressure release drive mechanism 30 and the pressure head 20, and the smooth and reliable expansion and contraction deformation of the elastic element 40 is ensured. Specifically, in Figures 1 to 2 As an example, the image tube dual indium sealing device 100 of this utility model also includes a limiting connecting sleeve 90 that is simultaneously fitted (i.e., fitted from the outside) onto both the first sleeve 70 and the second sleeve 80. The limiting connecting sleeve 90 restricts the range of movement of the second sleeve 80 relative to the first sleeve 70 along the pressing direction of the pressure head 20 under the drive of the elastic member 40, thereby preventing the elastic member 40 from accidentally separating and falling off from the first sleeve 70 and the second sleeve 80 due to contact. More specifically, in conjunction with Figure 1 and Figure 2As an example, the release and pressure drive mechanism 30 includes a lead screw 31, a nut 32 threadedly connected to the lead screw 31, and a mechanism frame 33 located outside the indium-sealed cavity 200; the mechanism frame 33 is mounted on the indium-sealed cavity 200, and the indium-sealed cavity 200 provides support for the mechanism frame 33; the nut 32 is fixed to the mechanism frame 33, and the mechanism frame 33 provides fixation for the nut 32; a rolling bearing 80 is assembled between the lead screw 31 and the first sleeve 70, and the rolling bearing 80 between the lead screw 31 and the first sleeve 70 is located inside the limiting connecting sleeve 90, as shown in the diagram. Figure 2 As shown; therefore, during the rotation of the lead screw 31, the lead screw 31 also moves in the direction indicated by arrow A or the opposite direction due to the fixation of the nut 32 and the mechanism frame 33, thereby driving the first sleeve 70, rolling bearing 34, elastic element 40, pressure sensor 50, second sleeve 80 and limiting connecting sleeve 90 to move together; in addition, with the help of the rolling bearing 34, the rotation of the lead screw 31 does not drive the first sleeve 70 to rotate, thereby avoiding the effect of the first sleeve 70 following the rotation of the lead screw 31 on the elastic element 40 to twist.

[0029] In order to achieve automatic rotation of the lead screw 31, Figure 1 In this example, the pressure release drive mechanism 30 further includes a rotary driver 35, a movable seat 36 for mounting the rotary driver 35, and a plurality of guide rods 37 disposed between the movable seat 36 and the mechanism frame 33 and spaced apart from each other. A lead screw 31 is located between the guide rods 37. Therefore, the guide rods 37 provide guidance for the movement of the movable seat 36, the rotary driver 35, and the lead screw 31 during the rotation of the lead screw 31 by the rotary driver 35; alternatively, as an example, the rotary driver 35 may be a rotary motor, but this is not a limitation. It should be noted that although... Figure 1 The diagram illustrates the case where the nut 32 is fixed to the frame 33. Clearly, depending on actual needs, the lead screw 31 can also be rotatably mounted on the frame 33, meaning the lead screw 31 can only rotate and cannot move in the direction indicated by arrow A or the opposite direction. In this case, a rolling bearing 34 is mounted between the nut 32 and the first sleeve 70, achieving the same purpose of moving the pressure head 20. Furthermore, when the pressure sensor 50 is designed, the second sleeve 80 is connected to the pressure sensor 50, thus indirectly mounting the second sleeve 80 to the pressure head 20 through the pressure sensor 50. Additionally, regarding... Figure 1 In the middle, the pressure head 20 is shaped like an inverted "T"; in addition, at Figure 2 In the process, the inner ring 341 of the rolling bearing 34 is fitted onto the end of the lead screw 31, and the first sleeve 70 and the inner ring 341 are fixed to the end of the lead screw 31 by a screw 311 passing through the first sleeve 70. The outer ring 342 of the rolling bearing 34 is fixed together by the limiting connecting sleeve 90 and the first sleeve 70. The limiting connecting sleeve 90 can be fixed together with the first sleeve 70. See the state. Figure 2As shown.

[0030] Compared with the prior art, by means of an elastic member 40 disposed between the pressure head 20 and the pressure release drive mechanism 30 and driving the pressure head 20 to move relative to the pressure release drive mechanism 30 along the pressing direction of the pressure head 20, when the pressure head 20 contacts the image tube 300 under the drive of the pressure release drive mechanism 30, the image tube 300 pushes the pressure head 20 back to make a buffered movement, thereby reducing the pressure applied to the indium cover (see Figure 1 The force of the first indium cover (reference 340) and the second indium cover (reference 350) is transformed into a flexible force to prevent over-pressure and damage to the indium cover in the image tube 300 to be sealed, thereby improving the reliability of the indium seal of the image tube 300.

[0031] It is worth noting that the first indium cover 340 is used for sealing between the tube housing 310 and the photocathode 320, and the second indium cover 350 is used for sealing between the tube housing 310 and the phosphor screen 330; so that after the pressure head 20 applies pressure to the image tube 300 assembled in the indium sealing cavity 200 and maintains the pressure for a certain period of time, a vacuum seal can be achieved between the photocathode 320 and the tube housing 310, and between the tube housing 310 and the phosphor screen 330. Alternatively, as an example, the first indium cover 340 is located on the tube housing 310, and the second indium cover 350 is located on the phosphor screen 330.

[0032] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A double indium sealing device for image tubes, suitable for assembly on an indium sealing cavity, comprising a sealing element, a pressure head capable of pressure release and movement, and a pressure release drive mechanism for driving the pressure head to move, wherein the pressure release drive mechanism is at least partially located outside the indium sealing cavity, the pressure release drive mechanism is assembled on the indium sealing cavity, the pressure head is at least partially located inside the indium sealing cavity, and the sealing element is connected to both the pressure head and the indium sealing cavity; or, the sealing element is connected to both the pressure release drive mechanism and the indium sealing cavity, characterized in that, The image tube dual indium sealing device also includes an elastic element disposed between the pressure head and the pressure release drive mechanism, the elastic element driving the pressure head to move relative to the pressure release drive mechanism along the pressure head's pressing direction.

2. The image tube dual indium sealing device according to claim 1, characterized in that, The elastic element is located outside the indium-sealed cavity.

3. The image tube dual indium sealing device according to claim 2, characterized in that, It also includes a pressure sensor located outside the indium sealing cavity and disposed between the pressure head and the elastic element.

4. The image tube dual indium sealing device according to claim 1, characterized in that, The sealing element is a bellows located within the indium sealing cavity. The first end of the bellows is connected to the indium sealing cavity in a sealed assembly. The pressure head extends from the opposite second end of the bellows along the internal space of the bellows, and the pressure head is also connected to the second end of the bellows in a sealed assembly.

5. The image tube dual indium sealing device according to claim 4, characterized in that, It also includes a guide sleeve located inside the bellows to guide the movement of the pressure head. The guide sleeve is fixed to the indium sealing cavity and is also sleeved on the pressure head.

6. The image tube dual indium sealing device according to claim 1, characterized in that, It also includes a tooling fixture for supporting the image tube to be sealed, the tooling fixture being located within the indium sealing cavity, and the tooling fixture being arranged opposite to the pressure head.

7. The image tube dual indium sealing device according to claim 2, characterized in that, It also includes a first sleeve and a second sleeve located between the pressure release drive mechanism and the pressure head. The first sleeve is mounted on the pressure release drive mechanism, and the second sleeve is mounted on the pressure head. The openings of the second sleeve and the first sleeve face each other. The first end of the elastic element is inserted into the first sleeve from the opening of the first sleeve and abuts against the first sleeve. The second end of the elastic element is inserted into the second sleeve from the opening of the second sleeve and abuts against the second sleeve.

8. The image tube dual indium sealing device according to claim 7, characterized in that, It also includes a limiting connecting sleeve that is simultaneously fitted onto both the first sleeve and the second sleeve, the limiting connecting sleeve restricting the range of movement of the second sleeve relative to the first sleeve along the pressing direction of the pressure head under the drive of the elastic element.

9. The image tube dual indium sealing device according to claim 8, characterized in that, The pressure release drive mechanism includes a lead screw, a nut threadedly connected to the lead screw, and a mechanism frame located outside the indium sealing cavity. The mechanism frame is assembled on the indium sealing cavity. The lead screw is rotatably assembled on the mechanism frame, and a rolling bearing is assembled between the nut and the first sleeve. Alternatively, the nut is fixed to the mechanism frame, and a rolling bearing is assembled between the lead screw and the first sleeve. The rolling bearing between the lead screw and the first sleeve is located inside the limiting connecting sleeve.

10. The image tube dual indium sealing device according to claim 9, characterized in that, The pressure release drive mechanism further includes a rotary driver, a movable seat for mounting the rotary driver, and a plurality of guide rods disposed between the movable seat and the mechanism frame and spaced apart from each other, with the lead screw located between the guide rods.

Images