X-ray tube with built-in collapsible device

Abstract

The X-ray tube comprises a shell, a tube core is installed in the shell, a stator is sleeved on the periphery of the tube core, an anode end cover and a cathode collapsible device are respectively installed at two ends of the shell, and insulating oil is filled in the shell. The cathode collapsible device comprises an elastic collapsible cylinder and a press-fitting ring, the upper portion of the elastic collapsible cylinder is a sealing ring edge, a connecting through hole is formed in the press-fitting ring, an installation opening is formed in the end of the shell, connecting screw holes are formed in the periphery of the installation opening, the elastic collapsible cylinder is connected with the shell, the tube core is installed in the shell through a tube core installation base, and the periphery of the elastic collapsible cylinder is sleeved with a collapsible device limiting cover. According to the utility model, the collapsible device is integrated in the bulb tube by utilizing the available space in the bulb tube, an external metal container is not required to be manufactured, pipeline connection is not required, and meanwhile, an additional mounting position is not required to be reserved outside the bulb tube, so that the structure is simplified, the cost is reduced, and the mounting difficulty is also reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of X-ray tubes and relates to an X-ray tube with a built-in expander and shrinker. Background Art

[0002] With the rapid development of science and technology, X-ray tubes are playing an increasingly important role in various fields such as medical diagnosis, safety inspection and non-destructive testing. The principle of X-ray tubes generating X-rays is as follows: the cathode filament is heated by electric current, and the electrons overcome the work function to form an electron cloud on the surface; under the action of the strong electric field of hundreds of thousands of high voltages applied between the cathode and the anode, the electrons are accelerated to fly to the anode and hit the target surface, generating X-rays. When the X-ray tube is in working state, the temperature of the bombardment point on the anode target disk can reach 2600°-2700°, and the heat will be dissipated into the insulating oil in the X-ray tube, causing the temperature of the insulating oil to rise, thereby causing the insulating oil to expand in volume. If there are no corresponding measures, the pressure in the X-ray tube will rise sharply, and eventually the X-ray tube core will rupture.

[0003] The existing solution is to add a rubber expander to the outside of the tube, connect it to the inside of the tube through an oil pipe, and fix it to the outer shell of the tube through threaded connection. The external expander requires a reserved installation position for the expander in the outer shell of the tube, and a metal container of matching shape needs to be designed and manufactured in a single group. At the same time, the existence of the connecting pipe also increases the risk of oil leakage of the entire tube assembly. Summary of the invention

[0004] The utility model aims to provide an X-ray tube with a built-in expander and shrinker, which can solve the above-mentioned problems and reduce the difficulty of installation.

[0005] According to the technical solution provided by the utility model: an X-ray tube with a built-in expander includes a shell, a tube core is installed in the shell, a stator is sleeved on the outer periphery of the tube core, an anode end cap and a cathode expander are installed at both ends of the shell respectively, and the shell is filled with insulating oil; the cathode expander includes an elastic expansion tube and a press-fit ring, the upper part of the elastic expansion tube is a sealing ring edge, the press-fit ring is provided with a connecting through hole, an installation port is opened at the end of the shell, and a connecting screw hole is provided on the outer periphery of the installation port, and the elastic expansion tube is connected to the shell.

[0006] As a further improvement of the utility model, the tube core is installed in the shell through a tube core installation seat.

[0007] As a further improvement of the utility model, an expander limiting cover is sleeved on the outer periphery of the elastic expansion and contraction cylinder.

[0008] As a further improvement of the present invention, the upper part of the expander limit cover is a limit cover connecting ring edge, the limit cover connecting ring edge is located between the mounting opening at the end of the shell and the sealing ring edge, and an oil passage is reserved at the bottom of the expander limit cover.

[0009] As a further improvement of the utility model, a cathode end cover is arranged on the outer side of the elastic expansion and contraction cylinder.

[0010] As a further improvement of the utility model, the cathode end cover is connected to the press-fitting ring by bolts, and the press-fitting ring is provided with an end cover connecting screw hole.

[0011] As a further improvement of the present invention, an air groove is provided on the upper part of the press-fitting ring.

[0012] As a further improvement of the utility model, insulating baffles are installed at the bottom of the expander limit cover and the bottom of the anode end cover.

[0013] As a further improvement of the utility model, the insulation baffle is used to adjust the insulation distance by adjusting the studs.

[0014] As a further improvement of the present invention, the adjusting stud is made of plastic.

[0015] The positive effects of this application are:

[0016] The utility model utilizes the available space in the ball tube to integrate the expander into the ball tube, without the need to make an external metal container or pipeline connection, and at the same time, without the need to reserve an additional installation position outside the ball tube, thereby simplifying the structure, reducing costs, and reducing installation difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is a structural schematic diagram of the cathode expander of the utility model.

[0019] Figure 3 It is a structural schematic diagram of the press-fit ring of the utility model.

[0020] Figure 4 It is a structural schematic diagram of the elastic expansion and contraction cylinder of the utility model.

[0021] Figure 5 It is a structural schematic diagram of the limiting cover of the utility model.

[0022] Figure 1-Figure 5 It includes a shell 1, a tube core 2, a stator 3, a tube core mounting seat 4, an anode end cover 5, a cathode expander 6, a press-fit ring 6-2, a connecting through hole 6-21, an end cover connecting screw hole 6-22, an air groove 6-23, an elastic expansion and contraction cylinder 6-3, a sealing ring edge 6-31, an expander limit cover 6-4, a limit cover connecting ring edge 6-41, an oil port 6-42, an insulating baffle 7, an adjusting stud 8, etc. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the utility model described herein. In addition, similar terms such as "including" and "having" mean that in addition to those contents already listed in "including" and "having", other contents that have not been listed can also be "included" and "having"; for example, a process, method, system, product or device that can include a series of steps or units is not necessarily limited to those steps or units that have been clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] Due to the angle of the drawing, some components may not be drawn, but their positions and connection relationships can be partially understood based on the text expression.

[0027] like Figure 1 As shown, the utility model is an X-ray tube with a built-in expander, comprising a shell 1, a tube core 2 is installed in the shell through a tube core mounting seat 4, a stator 3 is sleeved on the outer periphery of the tube core 2, an anode end cap and a cathode expander 6 are respectively installed at both ends of the shell 1, and the shell 1 is filled with insulating oil.

[0028] like Figure 2 As shown, the cathode expander 6 includes an elastic expansion tube 6-3 and a press ring 6-2. Figure 4 As shown, the upper part of the elastic expansion and contraction cylinder 6-3 is a sealing ring edge 6-31. Figure 3 As shown, a connecting through hole 6-21 is provided on the press-fitting ring 6-2, a mounting opening is opened at the end of the shell 1, and connecting screw holes are provided on the outer periphery of the mounting opening. The sealing ring edge 6-31 is attached to the mounting opening, the press-fitting ring 6-2 presses the sealing ring edge 6-31, and a bolt is passed through the connecting through hole 6-21 and then screwed into the connecting screw hole to connect the elastic expansion and contraction cylinder 6-3 to the shell 1, which also serves as a seal for the cathode of the bulb.

[0029] In order to prevent the elastic expansion and contraction tube 6-3 from excessively contracting inward when the temperature inside the housing 1 is low, an expander limit cover 6-4 is sleeved on the outer periphery of the elastic expansion and contraction tube 6-3. The upper part of the expander limit cover 6-4 is a limit cover connecting ring edge 6-41, which is located between the installation opening at the end of the housing 1 and the sealing ring edge 6-31 and is pressed by the press ring 6-2. Figure 5 An oil passage 6-42 is provided at the bottom of the expander and shrinker limit cover 6-4 to ensure that the insulating oil can smoothly enter and exit the limit cover.

[0030] In order to protect the elastic expansion and contraction cylinder 6-3 from the external environment, a cathode end cap 6-1 is arranged outside the elastic expansion and contraction cylinder 6-3. The cathode end cap 6-1 is connected to the press ring 6-2 by bolts, and the press ring 6-2 is provided with an end cap connection screw hole 6-22. After the installation of the cathode end cap 6-1 is completed, the cathode end cap 6-1 is opened separately to check the state of the elastic expansion and contraction cylinder 6-3 without affecting the sealing state.

[0031] like Figure 3 An air groove 6-23 is provided on the upper part of the press ring 6-2. When the elastic expansion and contraction cylinder 6-3 expands and contracts, the air between the elastic expansion and contraction cylinder 6-3 and the cathode end cover 6-1 can enter and exit through the air groove 6-23 to ensure the stability of the air pressure in the expander limit cover 6-4.

[0032] When the bulb is working, there will be tens of kilovolts of high voltage at both ends of the tube core 2. An insulating baffle 7 is installed at the bottom of the expander limit cover 6-4 and the bottom of the anode end cover 5, and the insulation distance is adjusted by adjusting the stud 8 to prevent the tube core 2 from sparking and breaking through the metal shell 1, and also to prevent it from sparking and breaking through the space inside the expander elastic expansion tube 6-3. The adjusting stud 8 is made of plastic.

[0033] The working process of the utility model is as follows:

[0034] When the temperature inside the bulb increases and the oil pressure increases, the elastic expansion and contraction tube 6-3 inside the cathode expander can expand and contract in the reserved space to relieve the pressure inside the bulb.

[0035] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An X-ray tube with a built-in expander, comprising a housing (1), characterized in that: A tube core (2) is installed in the shell, and a stator (3) is sleeved on the outer periphery of the tube core (2). An anode end cap and a cathode expander (6) are respectively installed at two ends of the shell (1), and the shell (1) is filled with insulating oil; the cathode expander (6) comprises an elastic expansion cylinder (6-3) and a press-fit ring (6-2), the upper part of the elastic expansion cylinder (6-3) is a sealing ring edge (6-31), and the press-fit ring (6-2) is provided with a connecting through hole (6-21); an installation opening is opened at the end of the shell (1), and a connecting screw hole is provided on the outer periphery of the installation opening, and the elastic expansion cylinder (6-3) is connected to the shell (1).

2. The X-ray tube with a built-in expander as claimed in claim 1, characterized in that: The tube core (2) is installed in the housing via a tube core mounting seat (4).

3. The X-ray tube with a built-in expander as claimed in claim 1, characterized in that: An expander limiting cover (6-4) is sleeved on the outer periphery of the elastic expansion and contraction cylinder (6-3).

4. The X-ray tube with a built-in expander as claimed in claim 3, characterized in that: The upper portion of the expander limit cover (6-4) is a limit cover connecting ring edge (6-41), the limit cover connecting ring edge (6-41) is located between the mounting opening at the end of the housing (1) and the sealing ring edge (6-31), and an oil passage (6-42) is reserved at the bottom of the expander limit cover (6-4).

5. The X-ray tube with a built-in expander as claimed in claim 1, characterized in that: A cathode end cover (6-1) is arranged outside the elastic expansion and contraction cylinder (6-3).

6. The X-ray tube with a built-in expander as claimed in claim 5, characterized in that: The cathode end cover (6-1) is connected to the press ring (6-2) via bolts, and the press ring (6-2) is provided with an end cover connection screw hole (6-22).

7. The X-ray tube with a built-in expander as claimed in claim 5, characterized in that: An air groove (6-23) is provided on the upper portion of the press-fitting ring (6-2).

8. The X-ray tube with a built-in expander as claimed in claim 3, characterized in that: An insulating baffle (7) is installed at the bottom of the expander limit cover (6-4) and the bottom of the anode end cover (5).

9. The X-ray tube with a built-in expander as claimed in claim 8, characterized in that: The insulation baffle (7) is adjusted to adjust the insulation distance by adjusting the stud (8).

10. The X-ray tube with a built-in expander as claimed in claim 9, characterized in that: The adjusting stud (8) is made of plastic.

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