Oil compensation and quick-change circulation joint and 90kV portable X-ray machine

Abstract

The invention belongs to the field of oil compensation, and particularly discloses an oil compensation and quick-change circulation connector and a 90kV portable X-ray machine. An oil liquid compensation and quick-change circulation connector is characterized by comprising a constant-pressure anti-fouling connector and a compensator communicated with the constant-pressure anti-fouling connector. The constant-pressure antifouling connector comprises a radiator connection port seat, and an oil passing assembly, a self-locking assembly and a gas film adjusting assembly which are sequentially arranged in the radiator connection port seat from bottom to top. The compensator sequentially comprises a compensator base, a communicating pipeline arranged in the compensator base and an oil storage cavity from bottom to top, and the communicating pipeline communicates with the interior of the self-locking assembly. The 90 kV medical portable X-ray machine solves the problems that in the prior art, oil compensation is insufficient, maintenance is inconvenient, and heat dissipation efficiency is low, the reliability and stability of the 90 kV medical portable X-ray machine in a special environment are remarkably improved, and meanwhile the portability and maintenance convenience of the equipment are enhanced.

Description

Technical Field

[0001] The invention belongs to the technical field of oil compensation, and in particular relates to an oil compensation and quick-change circulation joint and a 90kV portable X-ray machine. Background Art

[0002] The replacement and maintenance of electrical equipment oil mainly rely on a variety of equipment and technical means. For example, vacuum oil filters can quickly and efficiently remove moisture, gas and impurities from electrical equipment oil through vacuum dehydration and filtration technology, and improve the oil's compressive strength. Pressure oil filters use pressure difference for filtration, which can also effectively remove suspended particles and other contaminants in electrical equipment oil. Thermosyphon or oil purifier is a continuous regeneration device with adsorbents such as silica gel or activated alumina inside. It removes moisture and impurities from the oil through hot oil circulation and reduces the acid value of the oil. Modular electrical equipment insulating oil treatment systems, such as Alfa Laval vacuum oil cleaning module (OCM-V), use centrifugal separation and vacuum dehydration to remove dissolved moisture and gas, providing efficient oil treatment solutions. Oil storage cabinets and supporting equipment, such as dehumidifiers, oil drain devices and oil filling devices, help prevent moisture intrusion and facilitate oil change operations. High-purity nitrogen (99.99%) is used for vacuum oil filling to ensure that the air inside the electrical equipment is completely removed and extend the service life of the oil. Heaters and silicone tanks are used to heat the insulating oil during the oil change process and circulate and filter it to ensure that the oil quality meets the standards. Special tools and equipment, such as those used to test and replace automotive transmission oil pressure, oil and oil coolers, can also be used to replace electrical equipment oil.

[0003] Although the above-mentioned technical means have solved the problem of oil replacement and maintenance of electrical equipment to a certain extent, they also have certain limitations and inconveniences. For example, although the vacuum oil filter is highly efficient, it may be limited by environmental conditions when used on site; the pressure oil filter may not be able to treat the oil thoroughly due to improper pressure regulation; the method of using special tools and equipment can be used as a reference, but there may be applicability issues in actual applications. Especially for the 90kV medical portable X-ray machine, which is compact and requires portability, it often cannot fully cope with the changes in oil volume in high and low altitudes and extreme hot and cold environments, which may cause the internal pressure of the 90kV medical portable X-ray machine to be unbalanced, affecting the normal operation of the equipment, and may even cause the X-ray tube in the machine to burst. Summary of the invention

[0004] The present invention provides an oil compensation and quick-change circulation connector and a 90kV portable X-ray machine, which are used to solve the problem that the current portable 90kV medical portable X-ray machine cannot fully cope with the oil volume changes in high and low altitudes and extreme cold and hot environments when changing oil, which may cause internal pressure imbalance and affect the normal operation of the equipment.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: the oil compensation and quick-change circulation joint, wherein, comprises: a constant pressure anti-fouling joint and a compensator connected to the constant pressure anti-fouling joint;

[0006] The constant pressure anti-fouling joint comprises a radiator docking port seat, an oil-passing component, a self-locking component and an air film regulating component which are sequentially arranged in the radiator docking port seat from bottom to top;

[0007] The compensator includes, from bottom to top, a compensator seat, a communication pipe arranged in the compensator seat, and an oil storage chamber, wherein the communication pipe is communicated with the interior of the self-locking assembly;

[0008] The constant pressure anti-fouling joint is made of insulating material except for the self-locking component, and the compensator is made of insulating material.

[0009] In a preferred embodiment of the present invention, the oil passage assembly includes a sealing pressure ring, a valve core upper seal arranged above the sealing pressure ring, a connecting port valve core arranged above the valve core upper seal, and a connecting ball valve handle arranged on one side of the connecting port valve core.

[0010] In a preferred embodiment of the present invention, the self-locking assembly includes a transversely arranged self-locking spring and a bottle push plate arranged on the side of the self-locking spring close to the compensator, and the self-locking spring is arranged above the oil passing assembly.

[0011] In a preferred embodiment of the present invention, the air film regulating component includes an air film shell thread, an air film telescopic film, and an air-permeable and oil-proof film group. At least part of the air film regulating component is arranged inside the radiator docking seat. The air film shell thread includes an inner ring body and an outer ring body arranged concentrically. The interior of the inner ring body is connected to the interior of the self-locking component. The inner ring body includes a contraction section, a first expansion section arranged at the upper part of the contraction section, and a second expansion section arranged at the lower part of the contraction section. The inner diameter of the contraction section is smaller than the inner diameter of the first expansion section, and the inner diameter of the first expansion section is equal to the inner diameter of the second expansion section.

[0012] The air film telescopic membrane is arranged inside the first expansion section, and the air-permeable and oil-impeded film group is arranged above the air film telescopic membrane.

[0013] In a preferred embodiment of the present invention, the air film stretch membrane is an annular accordion structure, the bottom of the air film stretch membrane is sealed with the bottom of the first expansion section; the top of the air film stretch membrane is sealed with the bottom of the air-permeable and oil-impeded film group.

[0014] Furthermore, in one embodiment of the present invention, the ventilated oil-proof film group uses the TRAKETCH series of SABEU, which mainly includes three materials: polycarbonate (PC), polyester (PET) and polytetrafluoroethylene Q (PTFE). These materials have different chemical resistance and sealing compatibility and are suitable for different temperature ranges.

[0015] In a preferred embodiment of the present invention, an air film ultrasonic welding cover is provided on the top of the air-permeable and oil-impeded film group.

[0016] In a preferred embodiment of the present invention, the connecting pipe includes a push rod valve core connected to the interior of the self-locking component, a push rod valve handle arranged on the side of the push rod valve core away from the self-locking component, and an oil pipe arranged above the push rod valve core, the push rod valve core is arranged horizontally, the oil pipe is arranged vertically, the push rod valve core is connected to the interior of the oil pipe, and the oil pipe is connected to the oil storage chamber.

[0017] In a preferred embodiment of the present invention, a float is disposed inside the oil storage chamber, and the float can move up and down as the oil level in the oil storage chamber changes.

[0018] In a preferred embodiment of the present invention, the compensator seat includes a base and an outer shell disposed on the base, and a threaded cover is disposed on the top of the outer shell.

[0019] The present invention also discloses a portable X-ray machine, which includes an oil compensation and quick-change circulation joint and an oil tank, wherein the constant pressure anti-fouling joint is arranged inside the oil tank, and the compensator is arranged outside the oil tank.

[0020] The technical solution provided by the present invention has the following advantages compared with the prior art:

[0021] The present invention solves the problems of insufficient oil compensation, inconvenient maintenance, low heat dissipation efficiency, etc. in the prior art through a unique float structure, gas and liquid isolation membrane, modular design, improved heat dissipation and circulating oil change mechanism, and compact design, and significantly improves the reliability and stability of the 90kV medical portable X-ray machine in special environments, while also enhancing the portability and maintenance convenience of the equipment. The present invention solves the generation of metal fatigue at the welding position of the ultra-thin oil box, effectively preventing oil contamination and avoiding gas mixing. The modular design allows for disassembly to reduce counterweight after fixing the altitude and environment, and can also be connected to external equipment combinations for further temperature control. The present invention achieves the convenience of miniaturization and modularization through the innovation of traditional oil change and oil balance structure, and further increases the feasibility of circulating cooling of the heat dissipation function. This improvement not only improves the reliability and stability of the equipment in special environments, but also greatly enhances its portability and maintenance convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the connection between an oil compensation and quick-change circulation joint and an oil tank of a X-ray machine described in one embodiment of the present invention;

[0024] Figure 2 It is an internal cross-sectional view of an oil compensation and quick-change circulation joint described in one embodiment of the present invention;

[0025] Figure 3 It is a cross-sectional view of the air film shell thread of an oil compensation and quick-change circulation joint described in one embodiment of the present invention.

[0026] As shown in the figure:

[0027] 1-Oil tank; 2-Oil compensation and quick-change circulation connector; 21-Constant pressure anti-fouling connector; 22-Compensator; 211-Sealing pressure ring; 212-Connecting port valve core; 213-Connecting ball valve handle; 214-Valve core upper seal; 215-Self-locking spring; 216-Bottle push plate; 217-Upper seal pressure cover; 218-Air film shell thread; 219-Air film telescopic membrane; 2110-Ventilation and non-ventilation oil film group 2110; 2111-Welding cover; 2211-Base; 2212-Outer shell; 222-Oil storage chamber; 223-Push rod valve core; 224-Push rod valve handle; 225-Compensator cover; 226-Oil pipe; 227-Float; 228-Threaded cover; 81-Outer ring body; 82-Inner ring body; 821-Contraction section; 822-First expansion section; 823-Second expansion section. DETAILED DESCRIPTION

[0028] For ease of understanding, the oil compensation and quick-change circulation joint and the 90kV portable X-ray machine are described below in conjunction with embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0032] Combination Figure 1 As shown, the present invention discloses an oil compensation and quick-change circulation joint 2, comprising: a constant pressure anti-fouling joint 21 and a compensator 22 connected to the constant pressure anti-fouling joint 21. At the same time, the present invention also discloses a portable X-ray machine, comprising an oil compensation and quick-change circulation joint 2 and an oil tank 1, wherein the constant pressure anti-fouling joint 21 is arranged inside the oil tank 1, and the compensator 22 is arranged outside the oil tank 1.

[0033] Specifically, refer to Figure 1 In an oil compensation and quick-change circulation joint 2, a constant pressure anti-fouling joint 21 and a compensator 22 are connected together by seals and screws to form a complete compensation and quick-change circulation joint 2 mechanism. The modular design makes each component easy to replace and maintain. At the same time, the quick-change joint mechanism is compatible with various external modules such as condensers, which is convenient for quick connection on site, simplifies the maintenance process, and improves the flexibility and reliability of the system.

[0034] like Figure 2 As shown, the constant pressure anti-fouling joint 21 includes a radiator connection port seat, an oil passing component, a self-locking component and an air film regulating component which are sequentially arranged in the radiator connection port seat from bottom to top.

[0035] Specifically, the oil-passing assembly includes a sealing ring 211, a valve core upper seal 214 disposed above the sealing ring 211, a connecting port valve core 212 disposed above the valve core upper seal 214, and a connecting ball valve handle 213 disposed on one side of the connecting port valve core 212. In other words, the constant pressure anti-fouling joint 21 is connected to the inside of the oil tank 1 through the sealing ring 211, thereby realizing the flow of oil.

[0036] The self-locking assembly includes a transversely arranged self-locking spring 215 and a bottle push plate 216 arranged on one side of the self-locking spring 215 close to the compensator 22. The self-locking spring 215 is arranged above the oil-passing assembly. An upper sealing cover 217 is arranged on the other side of the self-locking spring 215.

[0037] In addition, the constant pressure anti-fouling joint 21 is made of insulating material except the self-locking component, and the compensator 22 is made of insulating material. Since oil aging will reduce the insulation performance, in the present invention, all components except the self-locking spring 215 are made of insulating material to achieve electrical insulation performance applicable to 90kv high voltage electrical environment. Its insulating material can be selected from bakelite, peek, high insulation performance fiberglass, ceramics, etc.

[0038] The air film regulating component includes an air film shell thread 218, an air film telescopic membrane 219 and an air-permeable and oil-impeded film group 2110. At least part of the air film regulating component is arranged inside the radiator connection seat.

[0039] Combination Figure 2 and Figure 3 As shown, the air film shell thread 218 includes an inner ring body 82 and an outer ring body 81 arranged concentrically, and the interior of the inner ring body 82 is connected to the interior of the self-locking component. The inner ring body 82 includes a contraction section 821, a first expansion section 822 arranged at the upper part of the contraction section 821, and a second expansion section 823 arranged at the lower part of the contraction section 821. The inner diameter of the contraction section 821 is smaller than the inner diameter of the first expansion section 822, and the inner diameter of the first expansion section 822 is equal to the inner diameter of the second expansion section 823.

[0040] Continue to refer to Figure 2 As shown, the air film stretch film 219 is arranged inside the first expansion section 822, and the air-permeable oil-proof film group 2110 is arranged above the air film stretch film 219. The air film stretch film 219 is a ring-shaped accordion structure, the bottom of the air film stretch film 219 is sealed with the bottom of the first expansion section 822, and the top of the air film stretch film 219 is sealed with the bottom of the air-permeable oil-proof film group 2110.

[0041] Here, the accordion structure characteristics of the air film expansion membrane 219 are used to compress the air, reduce the resistance when the valve is opened, and have a certain degree of air resistance buffering effect. Through the physical characteristics of the air film expansion membrane 219, the force required to open the valve is reduced, making the oil compensation more efficient, while reducing the wear and maintenance cost of the equipment.

[0042] In addition, the air-permeable oil-proof film group 2110 is a cylinder with a hollow interior. An air film ultrasonic welding cover 2111 is provided on the top of the air-permeable oil-proof film group 2110 .

[0043] like Figure 2 The present invention sets up a gas and liquid isolation membrane structure, and filters the gas in the oil tank 1 through the air-proof oil-proof membrane group 2110 and the air film telescopic membrane 219. When the balance is reached, the heat dissipation connecting ball valve handle 213 can be completely closed to isolate the gas and avoid ignition, which is equivalent to adding a layer of protection to the treated oil. This structure can effectively prevent tiny bubbles and other air from entering the oil tank 1, avoid air ionization expansion leading to metal fatigue or shell deformation or electronic device sintering, and improve the purity and compressive strength of the oil.

[0044] Reference Figure 2 The compensator 22 includes, from bottom to top, a compensator 22 seat, a connecting pipe arranged in the compensator 22 seat, and an oil storage chamber 222, and the connecting pipe is connected to the interior of the self-locking component.

[0045] The communication pipeline includes a push rod valve core 223 connected to the interior of the self-locking component, a push rod valve handle 224 arranged on the side of the push rod valve core 223 away from the self-locking component, and an oil pipe 226 arranged above the push rod valve core 223. The push rod valve core 223 is arranged horizontally, and the oil pipe 226 is arranged vertically. The push rod valve core 223 is connected to the interior of the oil pipe 226, and the oil pipe 226 is connected to the oil storage chamber 222. A compensator cover 225 is arranged on the side of the push rod valve handle 224 away from the push rod valve core 223.

[0046] The oil storage chamber 222 is provided with a buoy 227, which can move up and down as the oil level in the oil storage chamber 222 changes. The oil level can be automatically adjusted to ensure that the internal and external pressures are balanced in any environment. The buoy 227 is connected to the atmosphere and has a running space. As the internal pressure changes, the buoy 227 can automatically rise and fall to achieve dynamic balance with the external air pressure. This method is more flexible and efficient than the traditional static compensation method.

[0047] The compensator 22 seat includes a base 2211 and an outer shell 2212 arranged on the base 2211. A threaded cover 228 is arranged on the top of the outer shell 2212. The threaded cover 228 is not only used for sealing, but also mainly uses the sealing function to control the pressure holding and pressure relief functions. In addition, the threaded cover 228 removes the rear interface and can be used to connect the piston rod in the middle hole to realize the manual oil suction and degassing exhaust functions. During the heat dissipation and circulating oil change process, by replacing the part above the outer shell 2212 of the compensator 22 to connect the oil pipe, the end can be selected to connect the oil tank 1, pump, heating or heat dissipation mechanism to achieve cooling or replacement. In this way, the heat dissipation and circulating oil change methods can be adjusted according to actual needs to ensure the temperature control and purification of the oil, extend the service life of the oil, and realize the active cooling function of the portable x-ray machine.

[0048] In the present invention, the installation process is as follows: the constant pressure anti-fouling joint 21 and the compensator 22 are installed inside and outside the oil box respectively. When the compensator 22 absorbs the heated and filtered silicone oil beyond the upper plane, it can be installed in the upper layer of the constant pressure anti-fouling joint 21. After locking, the compensator 22 push rod valve handle 224 and the heat dissipation connecting ball valve handle 213 are respectively tightened to 90 degrees, and finally the threaded cover 228 of the compensator 22 is opened for sealing.

[0049] When the present invention is working, when the volume of the oil changes, the oil passes through the ball valve sealing ring 211, the radiator connection port seat valve core, the bottle outer push plate 216, the compensator 22 push rod valve core 223, the oil pipe 226 and the compensator 22 seat, and reaches the oil storage chamber 222. Since the float 227 is connected to the atmosphere and has a running space, as the internal pressure changes, the float 227 starts to rise and fall, thereby achieving balance with the external air pressure.

[0050] In this process, some parts of the compensator 22 assembly at both ends, such as the part above the outer shell 2212 of the compensator 22, need to be replaced with connecting oil pipes, and the ends can be connected to oil tanks, pumps, heating or heat dissipation mechanisms. According to the actual position, the high-end oil inlet and low-end oil outlet are determined to achieve cooling or replacement. For details, please refer to Figure 1 The compensator 22 can be connected with the constant pressure anti-fouling joint 21 on the left to form an oil compensation and quick-change circulation joint 2, or it can be connected with the constant pressure anti-fouling joint 21 on the right to form an oil compensation and quick-change circulation joint 2, so as to adjust different positions to achieve different purposes of oil inlet and outlet. In order to ensure the function of filtering gas, the actual use direction also needs to be considered when installing the constant pressure anti-fouling joint 21, and ensure that the direction of the air film shell thread 218 is upward.

[0051] The present invention solves the problems of insufficient oil compensation, inconvenient maintenance, low heat dissipation efficiency, etc. in the prior art through a unique float 227 structure, a gas and liquid isolation membrane, a modular design, an improved heat dissipation and circulating oil change mechanism, and a compact design, and significantly improves the reliability and stability of the 90kV medical portable X-ray machine in special environments, while also enhancing the portability and maintenance convenience of the equipment.

[0052] The present invention solves the problem of metal fatigue at the welding position of the ultra-thin oil box, effectively prevents oil contamination, and avoids gas mixing. The modular design allows for disassembly to reduce the weight after fixing the altitude and environment, and can also be connected to the external equipment combination for further temperature control. The present invention achieves the convenience of miniaturization and modularization by innovating the traditional oil change and oil balance structure, and further increases the feasibility of circulating cooling of the heat dissipation function. This improvement not only improves the reliability and stability of the equipment in special environments, but also greatly enhances its portability and maintenance convenience.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil compensation and quick-change circulation joint, characterized in that: include: A constant pressure anti-fouling joint and a compensator connected to the constant pressure anti-fouling joint; The constant pressure anti-fouling joint comprises a radiator docking port seat, an oil-passing component, a self-locking component and an air film regulating component which are sequentially arranged in the radiator docking port seat from bottom to top; The compensator includes, from bottom to top, a compensator seat, a communication pipe arranged in the compensator seat, and an oil storage chamber, wherein the communication pipe is communicated with the interior of the self-locking assembly; The constant pressure anti-fouling joint is made of insulating material except for the self-locking component, and the compensator is made of insulating material.

2. The oil compensation and quick-change circulation joint according to claim 1, characterized in that: The oil-passing assembly includes a sealing pressure ring, a valve core upper seal arranged above the sealing pressure ring, a connecting port valve core arranged above the valve core upper seal, and a connecting ball valve handle arranged on one side of the connecting port valve core.

3. The oil compensation and quick-change circulation joint according to claim 1 is characterized in that: The self-locking component comprises a transversely arranged self-locking spring and a bottle push plate arranged on a side of the self-locking spring close to the compensator. The self-locking spring is arranged above the oil passing component.

4. The oil compensation and quick-change circulation joint according to claim 1, characterized in that: The air film regulating component comprises an air film shell thread, an air film telescopic film and an air-permeable oil-proof film group, at least part of the air film regulating component is arranged inside the radiator docking port seat, the air film shell thread comprises an inner ring body and an outer ring body arranged concentrically, the interior of the inner ring body is connected with the interior of the self-locking component; the inner ring body comprises a contraction section, a first expansion section arranged at the upper part of the contraction section and a second expansion section arranged at the lower part of the contraction section, the inner diameter of the contraction section is smaller than the inner diameter of the first expansion section, and the inner diameter of the first expansion section is equal to the inner diameter of the second expansion section; The air film telescopic membrane is arranged inside the first expansion section, and the air-permeable and oil-impeded film group is arranged above the air film telescopic membrane.

5. The oil compensation and quick-change circulation joint according to claim 4, characterized in that: The air film stretch membrane is an annular accordion structure, the bottom of the air film stretch membrane is sealed with the bottom of the first expansion section; the top of the air film stretch membrane is sealed with the bottom of the air-permeable and oil-proof film group.

6. The oil compensation and quick-change circulation joint according to claim 4, characterized in that: An air film ultrasonic welding cover is arranged on the top of the air-permeable and oil-impeded film group.

7. The oil compensation and quick-change circulation joint according to claim 1, characterized in that: The connecting pipeline includes a push rod valve core connected to the interior of the self-locking component, a push rod valve handle arranged on the side of the push rod valve core away from the self-locking component, and an oil pipe arranged above the push rod valve core, the push rod valve core is arranged horizontally, the oil pipe is arranged vertically, the push rod valve core is connected to the interior of the oil pipe, and the oil pipe is connected to the oil storage chamber.

8. The oil compensation and quick-change circulation joint according to claim 1, characterized in that: A float is arranged inside the oil storage cavity, and the float can move up and down as the oil level in the oil storage cavity changes.

9. The oil compensation and quick-change circulation joint according to claim 1, characterized in that: The compensator seat comprises a base and an outer shell arranged on the base, and a threaded cover is arranged on the top of the outer shell.

10. A 90kV portable X-ray machine, characterized in that: It comprises an oil compensation and quick-change circulation joint and an oil tank as described in any one of claims 1 to 9, wherein the constant pressure anti-fouling joint is arranged inside the oil tank, and the compensator is arranged outside the oil tank.

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