Oil injection structure applied to X-ray tube assembly

Abstract

The oil injection structure comprises a connecting part, a clamping part, an extrusion spring and a dismounting tool, the connecting part comprises a first connecting part and a second connecting part which are used for being connected with an oil port of a protective shell, a first through hole is formed in the first connecting part, a second through hole is formed in the second connecting part, and the clamping part is connected with the first connecting part and the second connecting part. One end of the extrusion spring is arranged in the first through hole, one end of the movable part is connected with the other end of the extrusion spring, the movable part comprises an oil injection part located in the first through hole and a sealing part located in the second through hole, and the oil injection part is provided with a plurality of oil injection holes; the disassembling tool comprises an oil pipe inserting and pulling part detachably connected with the oil pipe and an oil pipe connecting piece communicated with the inserting and pulling part, wherein the oil pipe connecting piece further comprises a rotating piece in threaded connection with the second connecting part. Through the mode, the oil injection structure disclosed by the utility model can prevent bubbles from being generated in a slow oil injection mode, and enables the oil pipe to be in quick plug-in connection, so that the oil injection is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of X-ray technology, specifically to an oil injection structure applied to X-ray tube assemblies. Background Technology

[0002] The X-ray tube assembly consists of an X-ray tube core and a protective shell. When the X-ray tube core is working, the protective shell needs to be filled with insulating oil. The insulating oil has two main functions: first, to ensure that the X-ray tube core is in a highly insulating and clean environment, thereby effectively preventing arcing caused by discharge under high voltage conditions; second, the X-ray tube core generates a large amount of heat energy during operation, of which less than 1% is converted into X-rays, while the remaining unconverted heat energy needs to be transferred to the insulating oil through heat conduction.

[0003] Normally, when supplying insulating oil to the protective casing, the insulating oil is supplied through oil pipes inserted into the inlet and outlet. However, the diameter of the oil pipe is almost the same as that of the outlet. Since the oil pipe is directly connected to the outlet, the oil injection speed is relatively fast. Excessive oil flow can easily generate air bubbles, causing the X-ray tube core, which is wrapped in insulating oil, to not be in a completely high-insulation and high-cleanliness environment. Over time, this can easily lead to the breakdown of the insulating oil, shorten the life of the X-ray tube assembly, and cause unstable X-ray output. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the shortcomings of the prior art, this utility model provides an oil injection structure for X-ray tube assemblies to solve the above-mentioned technical problems.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, this utility model provides a technical solution: an oil filling structure for an X-ray tube assembly, characterized in that it includes: a connecting part, comprising a first connecting part for being disposed in an oil port of a protective shell and a second connecting part connected to the first connecting part, wherein the first connecting part has a first through hole, and the second connecting part has a second through hole communicating with the first through hole; a locking part, disposed in the end of the first through hole away from the second through hole; a compression spring, one end of which is connected to the locking part; and a movable part, one end of which is connected to the other end of the compression spring, wherein the movable part includes a... The first through hole contains an oil injection part and a sealing part is located in the second through hole. The oil injection part has a plurality of first oil injection holes spaced apart along its length. Under normal circumstances, the compression spring compresses the sealing part to seal the second through hole and exposes the end of the sealing part outside the second through hole. The disassembly fixture includes an oil pipe insertion and removal part for detachable connection with an oil pipe and an oil pipe connector communicating with the oil pipe insertion and removal part. The oil pipe connector includes a mounting part communicating with the oil pipe insertion and removal part and a rotating part rotatably mounted on the mounting part. The rotating part is used for threaded connection with the second connecting part.

[0008] Preferably, the shape and size of the sealing part correspond to the shape and size of the second through hole.

[0009] Preferably, the oil injection part is cylindrical, the sealing part is frustum-shaped, the second through hole is frustum-shaped, wherein the outer diameter of the sealing part gradually decreases from one end near the oil injection part to the other end away from the oil injection part, and a first sealing ring is provided around the outer wall of the sealing part.

[0010] Preferably, the locking part is annular, wherein the inner wall of the first through hole of the first connecting part is provided with an annular locking groove, and the outer wall of the locking part extends to provide a locking block that is locked in the locking groove.

[0011] Preferably, the oil injection part has a retaining groove at one end away from the sealing part, and the plurality of first oil injection holes are arranged around the bottom wall of the retaining groove, wherein the other end of the compression spring is retaining in the retaining groove.

[0012] Preferably, the rotating component is cylindrical, the second connecting part is cylindrical, one end of the rotating component is provided with a receiving groove, the other end of the rotating component is provided with an opening communicating with the receiving groove, wherein the inner wall of the receiving groove of the rotating component is provided with an internal thread, and the outer wall of the second connecting part is provided with an external thread that is threadedly connected to the internal thread.

[0013] Preferably, the mounting portion includes a first mounting portion housed in a receiving groove and a second mounting portion passing through the opening, wherein the second mounting portion is provided with a third through hole communicating with the oil pipe insertion and removal portion, the first mounting portion is provided with a plurality of second oil injection holes at intervals communicating with the third through hole, and the end of the sealing portion does not correspond to the second oil injection holes.

[0014] Preferably, the second connecting portion is provided with a first positioning hole and a second positioning hole at intervals on one end face facing the first mounting portion, and the first mounting portion is provided with a first positioning post for insertion into the first positioning hole and a second positioning post for insertion into the second positioning hole at intervals on one end face facing the second connecting portion.

[0015] Preferably, the first mounting part has a sealing groove surrounding the plurality of second oil injection holes on one end face facing the second connecting part, and a second sealing ring is arranged around the sealing groove.

[0016] Preferably, the oil port of the protective shell includes an oil inlet and an oil outlet, and the oil pipe includes an oil inlet pipe and an oil outlet pipe.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, this utility model provides an oil filling structure for an X-ray tube assembly, which has the following beneficial effects: The oil filling structure disclosed in this utility model prevents air bubbles from being generated in the insulating oil delivered into the protective shell by using a slow oil filling method. At the same time, it also uses a plug-in connection method for the oil pipe, making the delivery of insulating oil more convenient and faster. After the delivery is completed, after the rotating part is removed from the oil inlet and outlet, the movable part inside the oil port will automatically pop out to block the through hole used for the delivery or discharge of insulating oil, thereby effectively preventing the insulating oil from moving out and enhancing the service life of the product. Attached Figure Description

[0019] Figure 1 A schematic diagram of the connection structure of the X-ray tube assembly of this utility model during oil filling;

[0020] Figure 2 for Figure 1 Schematic diagram of the connection between the protective shell and the oil injection structure;

[0021] Figure 3 for Figure 2 Schematic diagram of the connection structure when the middle protective shell and the oil injection structure are separated;

[0022] Figure 4 for Figure 1 A cross-sectional schematic diagram of the oil injection structure;

[0023] Figure 5 for Figure 1A partial structural diagram of the intermediate oil injection structure;

[0024] Figure 6 for Figure 1 A schematic diagram of the second partial structure of the oil injection structure;

[0025] Figure 7 for Figure 1 A schematic diagram of the moving part of the oil injection structure. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1-7 As shown, this utility model discloses an oil injection structure for X-ray tube assemblies, including a connecting part 1, a locking part 2, a compression spring 3, a movable part 4, a disassembly fixture 5, and a rotating part 53.

[0028] The connecting part 1 includes a first connecting part 11 for being disposed in the oil port of the protective shell 8 and a second connecting part 12 connected to the first connecting part 11, wherein the first connecting part 11 is provided with a first through hole, and the second connecting part 12 is provided with a second through hole communicating with the first through hole. It should be understood that the first connecting part 11 is sealed in the oil port of the protective shell 8, while the second connecting part 12 is engaged outside the oil port of the protective shell 8.

[0029] The locking part 2 is located inside the end of the first through hole that is away from the second through hole.

[0030] One end of the compression spring 3 is connected to the locking part 2. It should be understood that the compression spring 3 is provided on the locking part 2, and when the compression spring 3 extends, it extends in the direction of the second through hole.

[0031] One end of the movable part 4 is connected to the other end of the compression spring 3. The movable part 4 includes an oil injection part 41 located in the first through hole and a sealing part 42 located in the second through hole. The oil injection part 41 has a plurality of first oil injection holes 411 spaced apart along its length. Under normal circumstances, the compression spring 3 compresses the sealing part 42 to seal the second through hole and exposes the end of the sealing part 42 outside the second through hole. That is, when the movable part 4 is not subjected to external force, the compression spring 3 squeezes the end of the sealing part 42 of the movable part 4 outside the second through hole, and the sealing part 42 seals the second through hole, thereby closing the passage between the connecting part 1 and the outside world and preventing the leakage of internal insulating oil.

[0032] The disassembly fixture 5 includes an oil pipe insertion / removal part 51 for detachable connection with an oil pipe and an oil pipe connector communicating with the oil pipe insertion / removal part 51. The oil pipe connector includes a mounting part 52 communicating with the oil pipe insertion / removal part 51 and a rotating part 53 rotatably disposed on the mounting part 52, wherein the rotating part 53 is used for threaded connection with the second connection part 12. It should be understood that the disassembly fixture 5 is actually an accessory that connects the oil pipe and the connecting part 1. The oil pipe insertion part 51 is simply and quickly inserted into the oil pipe (if the oil pipe has an interface, the oil pipe insertion part 51 and the oil pipe are connected through a quick-connect male and female interface, which is an existing technical structure and will not be described in detail here). One end of the mounting part 52 is connected to the connecting part 1, and the other end of the mounting part 52 is connected to the oil pipe insertion part 51. Then the oil pipe can be connected to the connecting part 1. It does not need to be fixedly connected like other oil pipes and oil inlets (fixed connection means that the X-ray tube cannot be moved) or threaded connection (the oil pipe in the threaded connection will be twisted due to the rotation of the thread direction during the connection process, which may cause the inner wall channel of the pipe to be interrupted and unable to deliver insulating oil). It is simpler and faster.

[0033] Preferably, the shape and size of the sealing part 42 correspond to the shape and size of the second through hole. That is, when the sealing part 42 is pushed to the second through hole by the compression spring 3, the sealing part 42 will fill the second through hole, thereby isolating the protective shell 8 from the outside to achieve a sealing effect.

[0034] Furthermore, the oil filling part 41 is cylindrical, the sealing part 42 is frustum-shaped, and the second through hole is frustum-shaped. The outer diameter of the sealing part 42 gradually decreases from the end near the oil filling part 41 to the end away from the oil filling part 41. A first sealing ring 421 is arranged around the outer wall of the sealing part 42. It should be understood that when the disassembly tool 5 is removed from the connecting part 1, the compression spring 3, which is pressed at the bottom of the first through hole, will lose its compressive force. The compression spring 3 will then release its compressive force and press against the sealing part 42 inside the second through hole. Immediately afterwards, the first sealing ring 421 will abut against the inner wall of the sealing part 42 and the second through hole, achieving a complete seal and preventing the insulating oil from leaking out.

[0035] Furthermore, the locking part 2 is annular, wherein the inner wall of the first through hole of the first connecting part 11 is provided with an annular locking groove, and the outer wall of the locking part 2 extends to provide a locking block 20 that is locked in the locking groove, so that the locking part 2 is locked in the first through hole by the locking block 20.

[0036] In this embodiment, the end of the oil injection part 41 away from the sealing part 42 is provided with a retaining groove 410, and a plurality of first oil injection holes 411 are arranged around the bottom wall of the retaining groove 410, wherein the other end of the compression spring 3 is retained in the retaining groove 410. It should be understood that the first oil injection holes 411 are arranged at an angle. When the disassembly fixture 5 is connected to the connecting part 1, the sealing part 42 will be pressed down by the disassembly fixture 5. At this time, the insulating oil delivered from the disassembly fixture 5 will enter the oil injection part 41, and then the insulating oil will enter the retaining groove 410 from the plurality of first oil injection holes 411, and then flow into the interior of the protective shell through the retaining groove 410, thereby completing the oil injection.

[0037] Preferably, the first oil injection hole 411 is provided at the connection between the oil injection part 41 and the sealing part 42.

[0038] In this embodiment, the rotating member 53 is cylindrical and the second connecting part 12 is cylindrical. One end of the rotating member 53 is provided with a receiving groove 531 and the other end of the rotating member 53 is provided with an opening communicating with the receiving groove 531. The inner wall of the receiving groove 531 of the rotating member 53 is provided with an internal thread, and the outer wall of the second connecting part 12 is provided with an external thread that is threadedly connected to the internal thread.

[0039] Furthermore, the mounting part 52 includes a first mounting part 521 housed in the receiving groove 531 and a second mounting part 522 passing through the opening. The second mounting part 522 is provided with a third through hole communicating with the oil pipe insertion and removal part 51. The first mounting part 521 is provided with a plurality of second oil injection holes 5211 communicating with the third through hole at intervals. The end of the sealing part 42 does not correspond to the second oil injection holes 5211. It should be understood that after the rotating part 53 is threadedly connected to the second connecting part 12, the first mounting part 521 will push down the end of the sealing part 42 (that is, the first mounting part 521 squeezes the end of the sealing part 42 and moves it toward the oil injection part 41. There is a gap between the outer wall of the sealing part 42 and the inner wall of the second through hole, which facilitates the flow of insulating oil. At this time, the sealing part 42 no longer seals the second through hole, so that the insulating oil can enter the locking groove 410 from multiple first oil injection holes 411). However, during this process, the end of the sealing part 42 will not be stuck in the second oil injection hole 5211. Instead, the insulating oil will flow from the third through hole to multiple second oil injection holes 5211 of the first mounting part 521 and continue to flow into the second through hole. Moreover, the number of second oil injection holes 5211 is not large (such as three, and the diameter of the second oil injection hole 5211 is different from that of the second through hole). This makes the flow rate of the insulating oil during oil injection not fast, thereby preventing the occurrence of air bubbles due to the excessive flow rate of oil injection during the oil injection stage.

[0040] Preferably, the second connecting portion 12 has a first positioning hole 121 and a second positioning hole 122 spaced apart on one end face facing the first mounting portion 521, and the first mounting portion 521 has a first positioning post 5212 for insertion into the first positioning hole 121 and a second positioning post 5213 for insertion into the second positioning hole 122 spaced apart on one end face facing the second connecting portion 12. It should be understood that the first positioning hole 121 and the first positioning post 5212 correspond to each other, and the second positioning hole 122 and the second positioning post 5213 correspond to each other, serving a positioning function.

[0041] Furthermore, the first mounting portion 521 has a sealing groove surrounding the plurality of second oil injection holes 5211 on one end face facing the second connecting portion 12, and a second sealing ring 5214 is arranged around the sealing groove. It should be understood that when the first mounting portion 521 abuts against the second connecting portion 12, insulating oil will be supplied into the connecting portion 1, and the second sealing ring 5214 will seal the outside of the plurality of second oil injection holes 5211.

[0042] In this embodiment, the oil port of the protective shell 8 includes an oil inlet and an oil outlet, and the oil pipe includes an oil inlet pipe and an oil outlet pipe.

[0043] Specific working principle:

[0044] First, connect the rotating part 53 to the second connecting part 12 by thread (the mounting part 52 and the rotating part 53 are connected). Then, connect the oil pipe insertion part 51 to the oil pipe to deliver insulating oil. When delivery is no longer needed, the disassembly process of the oil filling structure is also very simple. After turning off the oil filling switch, pull the oil pipe insertion part 51 out of the oil pipe and then remove the rotating part 53 from the second connecting part 12. At this time, the compression spring 3 will push the sealing part 42 into the second through hole to seal it, thus quickly preventing the leakage of insulating oil.

[0045] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil injection structure for use in X-ray tube assemblies, characterized in that, include: The connecting part includes a first connecting part for being disposed in the oil port of the protective shell and a second connecting part connected to the first connecting part, wherein the first connecting part is provided with a first through hole and the second connecting part is provided with a second through hole communicating with the first through hole; The locking part is disposed inside the end of the first through hole that is away from the second through hole; A compression spring, one end of which is connected to the locking part; The movable part has one end connected to the other end of the compression spring. The movable part includes an oil injection part in the first through hole and a sealing part in the second through hole. The oil injection part has a plurality of first oil injection holes spaced apart along its length. Under normal circumstances, the compression spring compresses the sealing part to seal the second through hole and exposes the end of the sealing part outside the second through hole. The disassembly fixture includes a tubing plug for detachable connection with the tubing and a tubing connector communicating with the tubing plug. The oil pipe connector includes a mounting part that communicates with the oil pipe insertion part and a rotating part that is rotatably mounted on the mounting part, wherein the rotating part is used for threaded connection with the second connecting part.

2. The oil injection structure for X-ray tube assemblies according to claim 1, characterized in that, The shape and size of the sealing part correspond to the shape and size of the second through hole.

3. The oil injection structure for X-ray tube assemblies according to claim 2, characterized in that, The oil injection part is cylindrical, the sealing part is frustum-shaped, the second through hole is frustum-shaped, and the outer diameter of the sealing part gradually decreases from one end near the oil injection part to the other end away from the oil injection part. A first sealing ring is provided around the outer wall of the sealing part.

4. The oil injection structure for X-ray tube assemblies according to claim 3, characterized in that, The locking part is annular, wherein the inner wall of the first through hole of the first connecting part is provided with an annular locking groove, and the outer wall of the locking part extends to provide a locking block that is locked in the locking groove.

5. The oil injection structure for X-ray tube assemblies according to claim 4, characterized in that, The oil injection part is provided with a locking groove at one end away from the sealing part, and the plurality of first oil injection holes are arranged around the bottom wall of the locking groove, wherein the other end of the compression spring is locked in the locking groove.

6. The oil injection structure for X-ray tube assemblies according to claim 1, characterized in that, The rotating component is cylindrical, the second connecting part is cylindrical, one end of the rotating component is provided with a receiving groove, and the other end of the rotating component is provided with an opening communicating with the receiving groove. The inner wall of the receiving groove of the rotating component is provided with an internal thread, and the outer wall of the second connecting part is provided with an external thread that is threadedly connected to the internal thread.

7. The oil injection structure for X-ray tube assemblies according to claim 6, characterized in that, The mounting portion includes a first mounting portion housed in a receiving groove and a second mounting portion passing through the opening. The second mounting portion is provided with a third through hole communicating with the oil pipe insertion and removal portion. The first mounting portion is provided with a plurality of second oil injection holes that communicate with the third through hole at intervals. The end of the sealing portion does not correspond to the second oil injection holes.

8. The oil injection structure for X-ray tube assemblies according to claim 7, characterized in that, The second connecting part has a first positioning hole and a second positioning hole spaced apart on one end face facing the first mounting part, and the first mounting part has a first positioning post for insertion into the first positioning hole and a second positioning post for insertion into the second positioning hole spaced apart on one end face facing the second connecting part.

9. The oil injection structure for X-ray tube assemblies according to claim 7, characterized in that, The first mounting part has a sealing groove surrounding the plurality of second oil injection holes on one end face facing the second connecting part, and a second sealing ring is arranged around the sealing groove.

10. The oil injection structure for X-ray tube assemblies according to claim 1, characterized in that, The protective shell has an oil inlet and an oil outlet, and the oil pipe has an oil inlet pipe and an oil outlet pipe.

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