Cathode cover, high-voltage socket and X-ray generator

Abstract

The utility model discloses a cathode shield, a high-voltage socket and an X-ray generator, the cathode shield is used for reducing the electric field intensity of a welding seam formed by a connecting ring in the high-voltage socket and a socket body, the cathode shield is sleeved at one end of the socket body and outside the connecting ring, and a vacuum gap is defined between the cathode shield and the welding seam; a protruding part which protrudes towards the welding seam and surrounds the welding seam is defined by the inner wall face, close to one end, of the cathode cover, and the protruding part is used for reducing the radial distance between the inner wall face, at the protruding part, of the cathode cover and the welding seam so as to reduce the electric field intensity at the welding seam. According to the cathode cover provided by the embodiment of the utility model, the inner wall surface of the cathode cover is provided with the lug boss corresponding to the welding seam, so that the intensity of an electric field near the welding seam is reduced, and the insulation level and the high-voltage resistance of a high-voltage socket are improved.

Description

Technical Field

[0001] This utility model belongs to the field of X-ray technology, specifically relating to a cathode cover, a high-voltage socket, and an X-ray generator. Background Technology

[0002] High-voltage sockets are used in conjunction with high-voltage plugs to transmit high voltage from a high-voltage power supply to the load device (such as an X-ray tube). The high-voltage insulating ceramic in the high-voltage socket is welded and sealed to the metal connecting ring. For high-voltage X-ray tubes above 100kV, the junction of the insulating ceramic, metal connecting ring, and vacuum in the high-voltage socket is prone to flashover and arcing under the influence of the high-voltage electric field, potentially leading to socket breakdown and further affecting the reliability of the X-ray tube. Summary of the Invention

[0003] The purpose of this utility model embodiment is to provide a cathode cover, a high-voltage socket, and an X-ray generator to solve the problem of poor high-voltage resistance of high-voltage sockets in the prior art.

[0004] The first aspect of this utility model provides a cathode cover.

[0005] According to an embodiment of the present invention, a cathode cover is used to reduce the electric field strength at the weld formed by the connecting ring and the socket body in a high-voltage socket. The cathode cover is sleeved on one end of the socket body and the connecting ring and defines a vacuum gap between the cathode cover and the weld. The inner wall surface of the cathode cover near one end defines a protrusion that protrudes toward and surrounds the weld. The protrusion is used to reduce the radial distance between the inner wall surface of the cathode cover at the protrusion and the weld to reduce the electric field strength at the weld.

[0006] Furthermore, the radial distance between the weld and the end of the cathode cover facing the socket body is greater than the radial distance between the weld and the protrusion.

[0007] Furthermore, the axial distance between the weld and the protrusion facing the end of the socket body is greater than the radial distance between the weld and the protrusion.

[0008] Furthermore, the axial distance between the weld and the cathode cover at the end facing the socket body is greater than three times the radial distance between the weld and the protrusion.

[0009] Furthermore, the protrusion and one end of the cathode cover are connected by a step.

[0010] Furthermore, the steps are chamfered.

[0011] Furthermore, the protrusion and one end of the cathode cover are transitioned by a tapered variable diameter structure.

[0012] A high-voltage socket according to a second aspect embodiment of the present invention is used to mate with a high-voltage plug, the high-voltage socket comprising:

[0013] A socket body defining a receiving cavity extending through it along its axial direction for receiving a high-voltage plug;

[0014] A connecting ring, at least a portion of which is sleeved on one end of the socket body, and the end face of the connecting ring that contacts the socket body is welded to the outer wall surface of the socket body to form a weld.

[0015] The cathode cover described in the above embodiment is sleeved on one end of the socket body and the connecting ring and defines a vacuum gap between the cathode cover and the weld. The inner wall surface of the cathode cover near one end defines a protrusion that protrudes toward the weld and surrounds the weld. The protrusion is used to reduce the radial distance between the inner wall surface of the cathode cover at the protrusion and the weld to reduce the electric field strength at the weld.

[0016] Furthermore, one end of the socket body is provided with a connecting component for cooperating with the high-voltage plug, the connecting component including:

[0017] The first fixing member is formed as a ring. The first fixing member is disposed at one end of the socket body and connected to the inner wall surface of the connecting ring. The inner wall surface of the first fixing member defines a first annular groove extending circumferentially thereon.

[0018] The second fixing member is formed as a ring and is located at the end of the first fixing member away from the socket body. The inner wall surface of the second fixing member defines a second annular groove extending circumferentially thereon.

[0019] The first spring is disposed within the first annular groove;

[0020] The second spring is disposed within the second annular groove;

[0021] A conductive rod, one end of which is located inside the second fixing member, and the other end extends toward the end away from the first fixing member.

[0022] The X-ray generator according to a third aspect of the present invention includes the high-voltage socket described in the above embodiments.

[0023] According to the embodiment of the present invention, by providing a protrusion corresponding to the weld on the inner wall surface of the cathode cover, the electric field strength near the weld is reduced, thereby improving the insulation level and high voltage resistance of the high voltage socket. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of an X-ray generator in the prior art;

[0025] Figure 2 for Figure 1 A magnified schematic diagram of the local structure of M;

[0026] Figure 3 This is a schematic diagram of the structure of an X-ray generator according to one embodiment of the present invention;

[0027] Figure 4 for Figure 3 A magnified schematic diagram of the local structure of N;

[0028] Figure 5 This is a partial structural schematic diagram of an X-ray generator according to another embodiment of the present invention.

[0029] Figure Labels

[0030] High-voltage socket 100;

[0031] Cathode cover 10; Protrusion 11;

[0032] Socket body 20; Weld 21;

[0033] Connecting ring 30;

[0034] Connecting component 40; first fixing member 41; second fixing member 42; first spring 43; second spring 44; conductive rod 45. Detailed Implementation

[0035] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0036] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0037] In the prior art, the cathode cover 1 of the high-voltage socket is as follows Figure 1 and Figure 2As shown, the radial gap between the inner wall of the cathode cover 1 and the weld 2 is uniformly L, and the axial distance H between the weld 2 and the open end of the cathode cover 1 is also small. When a higher voltage is applied, the electric field strength at the weld 2 is large, which makes it easy to cause breakdown risk.

[0038] To address the technical problems existing in the current technology, the following section combines... Figures 3 to 5 The cathode cover 10 provided in this utility model will be described in detail through specific embodiments and application scenarios.

[0039] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0040] According to the present invention, the cathode cover 10 is used to reduce the electric field strength at the weld 21 formed by the connecting ring 30 and the socket body 20 in the high-voltage socket 100.

[0041] Specifically, the cathode cover 10 is fitted over one end of the socket body 20 and the connecting ring 30 and defines a vacuum gap between it and the weld 21. The inner wall surface of the cathode cover 10 near one end defines a protrusion 11 that extends circumferentially and protrudes toward the weld 21. The protrusion 11 is used to reduce the radial distance between the inner wall surface of the cathode cover 10 at the protrusion 11 and the weld 21, so as to reduce the electric field strength at the weld 21.

[0042] Furthermore, such as Figure 3 As shown, the high-voltage socket 100 includes a socket body 20 and a connecting assembly 40. The socket body 20 can be made of ceramic, but is not limited to this. The socket body 20 serves as insulation. To install the connecting assembly 40 at one end of the socket body 20, a metal connecting ring 30 needs to be welded to one end of the socket body 20. The connecting ring 30 is then connected to the connecting assembly 40. The socket body 20 and the connecting ring 30 are welded together on the outer surface of the socket body 20 to form a weld 21. The weld 21 is in contact with a vacuum, and the electric field strength near the weld 21 is relatively concentrated, which may cause partial discharge, break down the socket body 20, and affect the service life of the high-voltage socket 100. To address this, a protrusion 11 is defined on the inner wall surface of the cathode cover 10. The protrusion 11 is formed as an annular structure extending along the inner wall surface of the cathode cover 10. The protrusion 11 corresponds to and is coaxially arranged with the weld 21, and the weld 21 is located inside the annular structure formed by the protrusion 11. Compared with the conventional cathode cover 10 structure, this cathode cover 10 optimizes the gap between the cathode cover 10 and the weld 21, such as... Figure 4 and Figure 5 As shown, the protrusion 11 of the cathode cover 10 of this application provides a relatively small radial gap A between the cathode cover 10 and the weld 21.

[0043] Therefore, according to the embodiment of the present invention, by providing a protrusion 11 corresponding to the weld 21 on the inner wall surface of the cathode cover 10, the electric field strength near the weld 21 is reduced, and the insulation level and high voltage resistance of the high voltage socket 100 are improved.

[0044] According to one embodiment of the present invention, the radial distance between the weld 21 and the protrusion 11 is a first distance A; the radial distance between the weld 21 and the end of the cathode cover 10 facing the socket body 20 is a second distance C; the axial distance between the weld 21 and the end of the protrusion 11 facing the socket body 20 is a third distance D; and the axial distance between the weld 21 and the end of the cathode cover 10 facing the socket body 20 is a fourth distance B. In this embodiment of the present invention, the radial gap between the cathode cover 10 and the weld 21 is optimized by setting the protrusion 11. Specifically, as shown... Figure 4 and Figure 5 As shown, the second distance C is greater than the first distance A. That is, there is a small gap between the protrusion 11 and the weld 21 to reduce the electric field strength of the weld 21. One end of the cathode cover 10 maintains a large gap with the weld 21 to reduce the electric field strength on the surface of the socket body 20, thereby further improving the reliability of the high-voltage socket 100.

[0045] Preferably, the third distance D is greater than the first distance A, that is, the multiple of D / A is greater than 1.

[0046] Furthermore, such as Figure 4 and Figure 5 As shown, the fourth distance B is greater than three times the first distance A, that is, the ratio of B / A is greater than 3. This ratio can effectively protect the weld 21. It should be noted that the fourth distance B between the weld 21 and the lower end face of the cathode cover 10 can be increased by increasing the length of the socket body 20 (that is, increasing the length of the socket body 20 extending into the cathode cover 10), thereby increasing the ratio of the fourth distance to the third distance (B / A), and thus improving the insulation level and high voltage resistance of the high-voltage socket 100. Therefore, the high-voltage socket 100 according to the embodiment of this utility model can be used in high-voltage X-ray generators (closed tube and open tube) of 100kV and above, as well as other high-voltage power supply cavities and devices.

[0047] According to one embodiment of the present invention, such as Figure 4 As shown, the protrusion 11 and one end of the cathode cover 10 are connected by a step, and optionally, the step is chamfered.

[0048] In another embodiment of this utility model, such as Figure 5 As shown, the protrusion 11 and one end of the cathode cover 10 are connected by a tapered variable diameter structure. This structure is easy to process and can effectively protect the weld.

[0049] Furthermore, the transition between the protrusion 11 and the cathode cover 10 is not limited to the two methods mentioned above.

[0050] According to a second aspect of the present invention, a high-voltage socket 100 is used to cooperate with a high-voltage plug. The high-voltage socket 100 includes a socket body 20, a connecting ring 30, and a cathode cover 10 as described in any of the above embodiments.

[0051] Specifically, the socket body 20 defines a receiving cavity extending through it along its axial direction for accommodating a high-voltage plug; at least a portion of the connecting ring 30 is sleeved on one end of the socket body 20, and the end face of the connecting ring 30 in contact with the socket body 20 is welded to the outer wall surface of the socket body 20 to form a weld 21; the cathode cover 10 is sleeved on one end of the socket body 20 and outside the connecting ring 30 and defines a vacuum gap between it and the weld 21, and the inner wall surface of the cathode cover 10 near one end defines a protrusion 11 extending circumferentially and protruding toward the weld 21, the protrusion 11 is used to reduce the radial distance between the inner wall surface of the cathode cover 10 at the protrusion 11 and the weld 21 to reduce the electric field strength at the weld 21.

[0052] Furthermore, one end of the socket body 20 is provided with a connection component 40 for cooperating with a high-voltage plug. The connection component 40 includes a first fixing member 41, a second fixing member 42, a first spring 43, a second spring 44, and a conductive rod 45.

[0053] Specifically, such as Figure 3 As shown, the first fixing member 41 is formed as an annular member, and is disposed at one end of the socket body 20 and connected to the inner wall surface of the connecting ring. The inner wall surface of the first fixing member 41 defines a first annular groove extending circumferentially thereon. The second fixing member 42 is formed as an annular member, and is disposed at the end of the first fixing member 41 away from the socket body 20. The inner wall surface of the second fixing member 42 defines a second annular groove extending circumferentially thereon. The first spring 43 is disposed in the first annular groove. The second spring 44 is disposed in the second annular groove. One end of the conductive rod 45 is located in the second fixing member 42, and the other end extends toward the end away from the first fixing member 41.

[0054] During use, the cable plug of the external high-voltage power supply is inserted into the receiving cavity to connect to the X-ray generator. The common end of the cable plug contacts the first spring 43 and is then guided into the common end of the X-ray generator through the first fixing member 41 and the connecting ring 30. The first filament of the cable plug contacts the second spring 44 and is then guided into the first filament of the X-ray generator through the second fixing member 42. The second filament of the cable plug contacts the conductive rod 45 and is then guided into the second filament of the X-ray generator.

[0055] Since the high-voltage socket 100 according to the present invention has the cathode cover 10 described in the above embodiment, the high-voltage socket 100 according to the present invention also has a high level of insulation and high voltage resistance.

[0056] The X-ray generator according to the third aspect of this utility model includes the high-voltage socket 100 described in the above embodiment, as well as the first filament of the X-ray generator, the second filament of the X-ray generator, the anode target, and other structures (none of which are shown in the figure).

[0057] Since the X-ray generator according to the present invention has the high-voltage socket 100 described in the above embodiments, the X-ray generator according to the present invention also has a high level of insulation and high voltage resistance.

[0058] Other structures and techniques of the X-ray generator according to the embodiments of this utility model are prior art and will not be described in detail here.

[0059] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A cathode cover for reducing the electric field strength at the weld formed between the connecting ring and the socket body in a high-voltage socket, characterized in that, The cathode cover is fitted over one end of the socket body and the connecting ring and defines a vacuum gap between it and the weld. The inner wall surface of the cathode cover near one end defines a protrusion that protrudes toward and surrounds the weld. The protrusion is used to reduce the radial distance between the inner wall surface of the cathode cover at the protrusion and the weld to reduce the electric field strength at the weld.

2. The cathode cover according to claim 1, characterized in that, The radial distance between the weld and the end of the cathode cover facing the socket body is greater than the radial distance between the weld and the protrusion.

3. The cathode cover according to claim 2, characterized in that, The axial distance between the weld and the end of the protrusion facing the socket body is greater than the radial distance between the weld and the protrusion.

4. The cathode cover according to claim 3, characterized in that, The axial distance between the weld and the cathode cover at the end facing the socket body is greater than three times the radial distance between the weld and the protrusion.

5. The cathode cover according to claim 1, characterized in that, The protrusion is connected to one end of the cathode cover by a step.

6. The cathode cover according to claim 5, characterized in that, The steps are chamfered.

7. The cathode cover according to claim 1, characterized in that, The protrusion is connected to one end of the cathode cover by a tapered variable diameter structure.

8. A high-voltage socket for use with a high-voltage plug, characterized in that, The high-voltage socket includes: A socket body defining a receiving cavity extending through it along its axial direction for receiving the high-voltage plug; A connecting ring, at least a portion of which is sleeved on one end of the socket body, and the end face of the connecting ring that contacts the socket body is welded to the outer wall surface of the socket body to form a weld. The cathode cover according to any one of claims 1-7, wherein the cathode cover is sleeved over one end of the socket body and the connecting ring and defines a vacuum gap between the cathode cover and the weld, and the inner wall surface of the cathode cover near one end defines a protrusion that protrudes toward and surrounds the weld, the protrusion being used to reduce the radial distance between the inner wall surface of the cathode cover at the protrusion and the weld to reduce the electric field strength at the weld.

9. The high-voltage socket according to claim 8, characterized in that, One end of the socket body is provided with a connection component for cooperating with the high-voltage plug, the connection component including: The first fixing member is formed as a ring. The first fixing member is disposed at one end of the socket body and connected to the inner wall surface of the connecting ring. The inner wall surface of the first fixing member defines a first annular groove extending circumferentially thereon. The second fixing member is formed as a ring and is located at the end of the first fixing member away from the socket body. The inner wall surface of the second fixing member defines a second annular groove extending circumferentially thereon. The first spring is disposed within the first annular groove; The second spring is disposed within the second annular groove; A conductive rod, one end of which is located inside the second fixing member, and the other end extends toward the end away from the first fixing member.

10. An X-ray generator, characterized in that, Includes the high-voltage socket as described in any one of claims 8-9.

Images