CN219476615U - Expander and X-ray generator - Google Patents

Abstract

The utility model belongs to the technical field of X-ray equipment and discloses an expander and an X-ray generating device, wherein the expander comprises a piston cylinder, a piston and an elastic piece, the piston cylinder is detachably connected with an X-ray tube through a connecting flange, a piston cavity is arranged in the piston cylinder, the piston is arranged in the piston cavity and is divided into a containing cavity and a balance cavity, the piston can move along the axial direction of the piston cylinder, the elastic piece is arranged in the balance cavity, one end of the elastic piece is abutted to the piston, and the other end of the elastic piece is abutted to the bottom of the piston cavity.

Description

Expander and X-ray generator

Technical Field

The utility model relates to the technical field of X-ray equipment, in particular to an expander and an X-ray generating device.

Background

An X-ray tube is one of the core components in the field of modern medical imaging, and is used for generating X-rays. The interior of the X-ray tube is filled with high-voltage insulating oil except for the tube core, the supporting structural part, the related sensors and the cables, and the interior of the X-ray tube is free of air. When the X-ray tube works, about 99% of energy is converted into heat, only about 1% of energy is converted into X-rays, so that the temperature of high-voltage insulating oil in the X-ray tube can be increased along with the use of the X-ray tube, the density of the insulating oil can be reduced along with the increase of the temperature, the increase of the pressure in the X-ray tube is further caused, the use environment of the X-ray tube can be deteriorated due to the excessively high pressure, the normal use is influenced by light pressure, and the tube core is directly damaged due to heavy pressure.

In order to ensure that the pressures inside and outside the X-ray tube are consistent at different temperatures, an X-ray tube assembly is usually provided with a expander, and the expander is used for compensating the volume change of high-voltage insulating oil caused by temperature change, so that the pressures inside and outside the X-ray tube are consistent, the tube core can work normally in an environment with lower pressure level all the time, and the service life of the tube core is prolonged.

The existing X-ray tube expander is usually made of rubber materials and is of a bowl-shaped structure, a die is required to be opened for processing, the existing X-ray tube expander is connected with an X-ray tube in a welding mode, the existing expander is further poor in adaptation effect and universality, the problem of inconvenient disassembly and maintenance is solved, the rubber expander is in a compressed state when the temperature of the X-ray tube is low, and the expander is gradually expanded when the temperature of the X-ray tube is increased. Because the rubber material is softer, when the rubber expander is not fully expanded, the deformation of the rubber expander is often uncontrollable, so that the distribution of high-pressure oil in the X-ray tube is uneven, the integral gravity center position of the X-ray tube is influenced, and the image quality of the whole X-ray image system is adversely influenced. In a use scenario requiring high-speed rotation of the X-ray tube, uncontrolled deformation of the rubber expander can further adversely affect the imaging system, ultimately affecting image quality.

Disclosure of Invention

The utility model aims to provide an expander and an X-ray generating device, which have good adaptation effect and universality, are suitable for X-ray tubes of different types and sizes, can solve the problem that the deformation of a rubber expander after high-voltage insulating oil is heated and expanded is uncontrollable in the prior art, and improve the stability and the image quality of the whole image system.

To achieve the purpose, the utility model adopts the following technical scheme:

a expander connected to an X-ray tube configured to house an insulating oil, the expander comprising:

a piston cylinder, a piston cavity is arranged in the piston cylinder, a connecting flange is arranged at the opening end of the piston cavity, and the connecting flange is configured to be detachably connected with the X-ray tube;

the piston is arranged in the piston cavity and divides the piston cavity into a containing cavity and a balance cavity, and the containing cavity is communicated with the opening end of the piston cavity;

and the elastic piece is arranged in the balance cavity, one end of the elastic piece is abutted to the piston, and the other end of the elastic piece is abutted to the cavity bottom of the piston cavity.

Optionally, the piston comprises a first sealing ring, wherein the first sealing ring is sleeved on the periphery of the piston and is clamped between the piston and the cavity wall of the piston cavity.

Optionally, a limiting groove is formed in one side, facing the balance cavity, of the piston, and one end of the elastic piece is abutted to the limiting groove.

Optionally, a vent hole is formed in the bottom of the piston cavity, and the balance cavity is communicated with the outside through the vent hole.

Another object of the present utility model is to provide an X-ray generating device that is simple and convenient to install and easy to operate by a technician.

To achieve the purpose, the utility model adopts the following technical scheme:

an X-ray generating device comprising an X-ray tube and a expander as described above.

Optionally, an annular flange is arranged at the liquid outlet of the X-ray tube, and the connecting flange is detachably connected with the annular flange.

Optionally, the device further comprises a buffer plate, wherein the buffer plate covers part of the liquid outlet.

Optionally, the buffer plate and the connecting flange are connected to opposite sides of the annular flange.

Optionally, a plurality of liquid-permeable openings are arranged on the buffer plate.

Optionally, the device further comprises a second sealing ring, and the second sealing ring is clamped between the annular flange and the connecting flange.

The utility model has the beneficial effects that:

the piston cylinder is detachably connected to the X-ray tube through the connecting flange, the structure is simple, the dismounting and maintenance are convenient, compare in traditional expander welding on the X-ray tube, this application is because connecting area of connecting flange is bigger, thereby make the piston cylinder can adapt the X-ray tube of multiple dimensional specification, its adaptation effect and commonality are good, moreover, the piston sets up in the piston chamber, separate the piston chamber into holding chamber and balanced chamber, the holding chamber communicates in the liquid outlet, the piston can follow the axial displacement of piston cylinder, when the high-pressure insulating oil temperature in the X-ray tube changes, the volume expansion or the shrink of high-pressure insulating oil, make the piston follow the axial displacement of piston cylinder in order to balance the inside and outside pressure of X-ray tube, the elastic component sets up in balanced chamber, one end butt in the piston, the other end butt is in the chamber bottom of piston chamber, the elastic component provides certain holding power for the piston, the deformation is controllable, can keep the stable removal of piston, thereby the uncontrollable problem of deformation of traditional rubber expander has been avoided, and the stability and image quality of whole image system have been guaranteed.

Drawings

Fig. 1 is a cross-sectional view of a expander in a cold oil state provided by an embodiment of the present utility model;

fig. 2 is a cross-sectional view of an expander in a hot oil state provided by an embodiment of the present utility model.

Reference numerals:

100. an X-ray tube; 101. a liquid outlet; 102. an annular flange; 103. a buffer plate; 1031. a liquid penetration port; 104. a second seal ring;

1. a piston cylinder; 11. a piston chamber; 12. a connecting flange; 13. a receiving chamber; 14. a balancing cavity; 15. a vent hole;

2. a piston; 21. a limit groove;

3. an elastic member;

4. a first seal ring.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 and 2, the expander is connected to the X-ray tube 100, and in general, when the X-ray tube 100 is of a tubular structure, the expander may be connected to both ends of the X-ray tube 100, and when the X-ray tube 100 is of another specific structure, the expander may be connected to any plane of the X-ray tube 100. The X-ray tube 100 is configured to accommodate insulating oil, and is filled with high-voltage insulating oil, when in operation, the high-voltage insulating oil in the X-ray tube 100 expands and contracts in volume along with temperature changes, and in order to ensure that the pressure inside and outside the X-ray tube 100 is consistent at different temperatures, a expander is usually required to be connected with the X-ray tube 100 to compensate for the volume changes of the high-voltage insulating oil caused by temperature changes, so that the pressure inside and outside the X-ray tube 100 is consistent, the tube core can normally operate in an environment with lower pressure level all the time, and the service life of the tube core is prolonged. In the above operation, the expander has a cold oil state in which the expander is in a natural standby state as shown in fig. 1 and a hot oil state in which the expander is in a compressed state as shown in fig. 2.

The embodiment provides an expander comprising a piston cylinder 1, a piston 2 and an elastic member 3. Wherein, be provided with piston chamber 11 in the piston cylinder 1, the open end of piston chamber 11 is provided with flange 12, flange 12 is configured to detachably connect in X-ray tube 100, piston 2 sets up in piston chamber 11, separates piston chamber 11 into holding chamber 13 and balance chamber 14, holding chamber 13 communicates in the open end of piston chamber 11, elastic component 3 sets up in balance chamber 14, one end butt in piston 2, the other end butt in the chamber bottom of piston chamber 11.

In the utility model, the piston cylinder 1 is detachably connected to the X-ray tube 100 through the connecting flange 12, the structure is simple, the disassembly and the maintenance are convenient, compared with the traditional expander welded on the X-ray tube 100, the piston cylinder 1 can be matched with the X-ray tube 100 with various dimensions due to the larger connecting area of the connecting flange 12, the matching effect and the universality are good, the piston 2 is arranged in the piston cavity 11, the piston cavity 11 is divided into the accommodating cavity 13 and the balance cavity 14, the accommodating cavity 13 is communicated with the opening end of the piston cavity 11, insulating oil accommodated in the X-ray tube 100 enters the accommodating cavity 13 through the opening end of the piston cavity 11, the piston 2 can move along the axial direction of the piston cylinder 1, when the high-pressure insulating oil temperature in the X-ray tube 100 changes, the volume expansion or contraction of the high-pressure insulating oil can enable the piston 2 to move along the axial direction of the piston cylinder 1 so as to balance the inside and outside of the X-ray tube 100, the elastic piece 3 is arranged in the balance cavity 14, one end of the piston 2 is abutted against the piston 2, the other end of the piston cavity is abutted against the cavity bottom of the piston cavity 11, the elastic piece 3 is abutted against the piston 2, the elastic piece 3 can provide certain supporting force for the piston 2, the deformation stability can be controlled, the quality of the image can be controlled, and the image can not be stably deformed, and the quality of the image can be stably controlled, and the quality of the image can be stably can be ensured, and the problem can be stably prevented, and the quality can be stably deformed.

Specifically, the piston cylinder 1 is a cylinder with an opening at one end, a piston cavity 11 is formed in the piston cylinder, the connecting flange 12 is a portion extending out of the piston cavity 11 along the circumferential direction of the opening end of the piston cavity, the connecting flange 12 is configured to be detachably connected to the X-ray tube 100, and due to the fact that the connecting area of the connecting flange 12 is larger, the connecting flange can be fixed by bolts with various specifications, the expander can be suitable for the X-ray tubes 100 with different models and sizes, and accordingly technicians can conveniently install and detach the expander. Of course, in other embodiments, a connecting member other than bolts may be used to fixedly connect the connection flange 12 and the X-ray tube 100, which is not limited herein, and similarly, the detachable connection may also be of other specific structures, which are not described herein, so long as the detachable connection between the X-ray tube 100 and the expander can be achieved.

More specifically, the piston 2 divides the piston chamber 11 into two independent spaces, the space near the outlet end of the piston chamber 11 is a containing chamber 13, the containing chamber 13 is used for containing high-pressure insulating oil, the space near the bottom of the piston chamber 11 is a balancing chamber 14, the inside of the balancing chamber 14 is filled with air, and when the temperature of the high-pressure insulating oil in the X-ray tube 100 changes, the volume of the high-pressure insulating oil expands or contracts, so that the piston 2 moves along the axial direction of the piston cylinder 1 to balance the pressure inside and outside the X-ray tube 100.

In this embodiment, the elastic member 3 is a supporting spring, and provides a certain supporting force for the piston 2, so that the piston 2 can move in time towards the cavity opening direction of the piston cavity 11 to balance the internal pressure and the external pressure under the condition that the internal pressure of the X-ray tube 100 is reduced. In addition to the supporting springs, in other embodiments, the elastic member 3 may be another specific structure such as an elastic rubber pad, so long as the piston 2 can be supported and can move axially along the piston cavity 11, which is not limited herein.

The following description is made with respect to a specific structure of the expander:

specifically, as shown in fig. 1 and fig. 2, in order to ensure that high-voltage insulating oil does not enter the balance cavity 14 from the accommodating cavity 13, namely, oil leakage phenomenon occurs, and meanwhile, in order to further ensure that the piston 2 can feed back in time under the action of internal and external pressure difference, the expander further comprises a first sealing ring 4, wherein the first sealing ring 4 is sleeved on the periphery of the piston 2 and is clamped between the piston 2 and the cavity wall of the piston cavity 11, so that the piston 2 can drive the first sealing ring 4 to synchronously move while axially moving along the piston cavity 11.

More specifically, the periphery of the piston 2 is provided with a groove for accommodating the first sealing ring 4, the first sealing ring 4 is convexly arranged in the groove and is abutted to the cavity wall of the piston cavity 11, the arrangement of the groove ensures that the first sealing ring 4 is not easy to separate from the piston 2, the stability is better in the moving process of the piston 2, the tightness of the accommodating cavity 13 is further ensured, and the oil leakage phenomenon is avoided.

Specifically, a limiting groove 21 is formed in one side, facing the balance cavity 14, of the piston 2, the limiting groove 21 is an annular groove, and one end of the elastic piece 3 is abutted in the limiting groove 21. Optionally, one end of the elastic member 3 is clamped in the annular groove, so as to realize the fixed connection between the supporting spring and the piston 2, so that the piston 2 can stably move along the axial direction of the cylinder 1 of the piston 2 under the action of the spring force, and the deformation is controllable.

In this embodiment, the bottom of the piston cavity 11 is provided with the vent hole 15, and the balance cavity 14 is communicated with the outside through the vent hole 15, so as to balance the internal and external pressure differences, so as to ensure that the movement of the piston 2 is completely dependent on the internal pressure of the X-ray tube 100, thereby avoiding the problem that the piston 2 is difficult to move under the action of the air pressure in the balance cavity 14, enabling the expander to react in time, and regulating and controlling are accurate.

The embodiment also provides an X-ray generating device, which includes an X-ray tube 100 and the expander, and the expander has good universality, high adaptability and controllable deformation, so that the problem of uncontrollable deformation of the conventional rubber expander is avoided, and the stability and the image quality of the whole image system are further ensured.

Specifically, the liquid outlet 101 of the X-ray tube 100 is provided with an annular flange 102, that is, the position of the X-ray tube 100 near the liquid outlet 101 is convexly provided with a circle of annular flange 102 along the radial direction inside the X-ray tube 100, the annular flange 102 has a certain thickness along the axial direction of the X-ray tube 100, and the connecting flange 12 is detachably connected to the annular flange 102, so that the piston tube 1 is detachably connected to the X-ray tube 100 through the connecting flange 12, and a technician can conveniently and timely detach and maintain.

More specifically, the connecting flange 12 is detachably connected to the side of the annular flange 102 facing the liquid outlet 101, and in particular operation: a technician holds the piston tube 1 with the outlet end of the piston chamber 11 facing the outlet 101 of the X-ray tube 100 and aligns the connection flange 12 of the outlet end with the annular flange 102 at the outlet 101 of the X-ray tube 100. The annular flange 102 is provided with the screw thread groove that matches with the eyelet on the flange 12 towards one side of liquid outlet 101, and flange 12 passes gasket and eyelet through the bolt, and threaded connection is in the screw thread groove in order to realize detachable installation, in the above-mentioned setting, annular flange 102 and the pipe end interval setting of liquid outlet 101 to make flange 12 imbed in the liquid outlet 101, and then make the leakproofness of flange 102 and flange 12 junction better. In addition to the above arrangement, the annular flange 102 may be flush with or protrude from the tube end of the X-ray tube 100 near the liquid outlet 101 to further facilitate abutment of the connecting flange 12 against the annular flange 102 to accommodate more size X-ray tubes 100.

Specifically, the X-ray generating device further includes a buffer plate 103, the specific structure and shape of which are not limited, and the buffer plate 103 covers the liquid outlet 101, so that the high-voltage insulating oil can slowly enter the accommodating cavity 13 through the buffer plate 103, the flow speed of the high-voltage insulating oil is slowed down, and the safety and stability of the movement of the piston 2 are improved.

More specifically, the buffer plate 103 and the connecting flange 12 are connected to opposite sides of the annular flange 102, so that the flow speed of the insulating oil can be slowed down due to the buffer plate 103 during the process of passing through the annular flange 102, i.e. the annular flange 102 not only serves as a bearing foundation of the buffer plate 103, but also can realize detachable connection with the expander.

More specifically, the buffer plate 103 is connected to a side of the annular flange 102 facing away from the liquid outlet 101, and a circumferential outer edge portion of the buffer plate 103 abuts against and is connected to a side of the annular flange 102 facing away from the liquid outlet 101, where a specific connection manner may be screw connection, bonding, welding, and the like, and is not limited herein. The above arrangement enables both the piston cylinder 1 and the buffer plate 103 to be independently attached and detached.

Specifically, the buffer plate 103 is provided with a plurality of liquid-permeable openings 1031, the liquid-permeable openings 1031 penetrate through the inner surface and the outer surface of the buffer plate 103 and are uniformly distributed on the buffer plate 103, so that high-pressure insulating oil enters the accommodating cavity 13 of the piston cylinder 1 through the liquid-permeable openings 1031, the flow rate of the high-pressure insulating oil is further reduced, and the deformation of the expander is controllable. In addition to the above arrangement, the buffer plate 103 may be a flat plate body, without any holes, and is installed in a staggered manner to cover a part of the area of the liquid outlet 101 of the X-ray tube 100, so as to achieve the purpose of buffering.

Specifically, in order to ensure the tightness of the connection of the expander and the X-ray tube 100, the expander further comprises a second sealing ring 104, the second sealing ring 104 being interposed between the annular flange 102 and the connection flange 12, so as to avoid leakage of insulating oil therefrom.

More specifically, an annular groove for accommodating the second sealing ring 104 is disposed on a side of the annular flange 102 facing the liquid outlet 101, and the second sealing ring 104 is convexly disposed in the annular groove and abuts against a side of the connecting flange 12 facing the open end of the piston cavity 11, so as to realize tight connection between the annular flange 102 and the connecting flange 12, and avoid leakage of insulating oil therefrom. In addition to the above arrangement, the annular groove may be separately disposed on the side of the connecting flange 12 facing the open end of the piston cavity 11, and the second sealing ring 104 is convexly disposed in the annular groove and abuts against the annular flange 102, so that the second sealing ring 104 is more stable and not easy to break away under the limit of the annular groove, or a matched annular groove may be disposed on the opposite side of the annular flange 102 and the connecting flange 12, respectively, and the second sealing ring 104 is accommodated in the annular groove to further achieve the sealing effect, which is not limited herein. By arranging the annular groove, the sealing effect of the second sealing ring 104 is improved, and the second sealing ring 104 is prevented from moving and shifting in the use process.

Specifically, the piston chamber 11 is provided with a blocking member on a chamber wall at the outlet end, the blocking member is a screw, and is screwed on the chamber wall to block the piston 2 from being separated from the piston chamber 11, and of course, the blocking member may also be other specific structures such as a baffle, so long as the piston 2 can be blocked to avoid separation from the piston chamber 11, which is not limited herein.

In this embodiment, the expander is made of metal, and compared with the conventional rubber expander, the deformation is controllable, and the mold opening processing is not required.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. A expander connected to an X-ray tube (100), the X-ray tube (100) being configured to house an insulating oil, characterized by comprising:

a piston cylinder (1), wherein a piston cavity (11) is arranged in the piston cylinder (1), a connecting flange (12) is arranged at the opening end of the piston cavity (11), and the connecting flange (12) is configured to be detachably connected to the X-ray tube (100);

the piston (2) is arranged in the piston cavity (11) and divides the piston cavity (11) into a containing cavity (13) and a balance cavity (14), and the containing cavity (13) is communicated with the opening end of the piston cavity (11);

and the elastic piece (3) is arranged in the balance cavity (14), one end of the elastic piece is abutted against the piston (2), and the other end of the elastic piece is abutted against the cavity bottom of the piston cavity (11).

2. The expander according to claim 1, further comprising a first sealing ring (4), said first sealing ring (4) being sleeved on the outer periphery of said piston (2) and being sandwiched between said piston (2) and the chamber wall of said piston chamber (11).

3. The expander according to claim 1, wherein a side of the piston (2) facing the balancing chamber (14) is provided with a limit groove (21), one end of the elastic member (3) being in abutment with the limit groove (21).

4. A expander according to any one of claims 1-3, wherein the bottom of the piston chamber (11) is provided with a vent hole (15), and the balancing chamber (14) communicates with the outside through the vent hole (15).

An X-ray generating device, characterized by comprising an X-ray tube (100) and a expander according to any one of claims 1-4.

6. The X-ray generating device according to claim 5, characterized in that an annular flange (102) is provided at the outlet (101) of the X-ray tube (100), the connecting flange (12) being detachably connected to the annular flange (102).

7. The X-ray generating device according to claim 6, further comprising a buffer plate (103), the buffer plate (103) covering part of the liquid outlet (101).

8. The X-ray generating device according to claim 7, wherein the buffer plate (103) and the connecting flange (12) are connected to opposite sides of the annular flange (102).

9. The X-ray generating device according to claim 7, wherein a plurality of liquid-permeable openings (1031) are provided on the buffer plate (103).

10. The X-ray generating device according to claim 6, further comprising a second sealing ring (104), the second sealing ring (104) being sandwiched between the annular flange (102) and the connecting flange (12).