Low-temperature adsorption pump and low-temperature adsorption array suitable for fusion reactor

Abstract

The utility model discloses a low-temperature adsorption pump and a low-temperature adsorption array suitable for a fusion reactor. The low-temperature adsorption pump comprises a heat shielding baffle, a supercritical helium pipeline, a helium low-temperature plate, an adsorption bin, a high heat conduction plate and a gas baffle, the supercritical helium pipeline, the helium low-temperature plate, the adsorption bin, the high-thermal-conductivity plate and the gas baffle are sequentially arranged in the thermal baffle; and the adsorption bin is filled with an adsorbent. The adsorbent contained in the adsorption bin is multiple times that of a low-temperature adsorption plate with the same area, and particularly, the difference is larger when a low-temperature adsorption array is formed. Meanwhile, a single-stage heat shielding baffle can be used, enough high conductance is guaranteed, high pumping speed and large capacity can be achieved, the problem that activated carbon falls off in the operation process of the low-temperature adsorption pump is effectively solved, and the low-temperature adsorption pump can be used in the strong neutron irradiation environment such as a fusion device in the future.

Description

TECHNICAL FIELD

[0001] The utility model relates to low temperature adsorption pump technical field, concretely to a kind of low temperature adsorption pump and low temperature adsorption array suitable for fusion reactor. BACKGROUND

[0002] Low temperature adsorption pump has high pumping speed, large capacity, anti-magnetic field interference and many other advantages, often used in large scientific devices, for providing stable vacuum environment. At present, low temperature adsorption pump mostly uses activated carbon material as adsorbent, for example, low temperature adsorption pump uses coconut activated carbon material as adsorbent to carry out low temperature adsorption on gas.

[0003] At present, the fixation of activated carbon on low temperature adsorption pump is mainly through low temperature adhesive, but since low temperature adsorption pump is embedded type low temperature pump, it will be exposed to neutron irradiation environment for a long time, after low temperature pump operates for a period of time, low temperature adhesive will fail due to neutron irradiation, and activated carbon structure on low temperature adsorption plate will fall off, resulting in that low temperature adsorption pump cannot work normally. In addition, since low temperature pump needs to be regenerated after adsorption saturation, the adhesion of low temperature adhesive will also decrease after experiencing multiple regeneration processes. Furthermore, activated carbon will also fall off during transportation and installation of low temperature adsorption pump, and at least 10% of activated carbon will be found to fall off after low temperature adsorption pump is completely installed.

[0004] Traditional low temperature pump structure adopts adhesive method to fix activated carbon, and the thickness of activated carbon is limited, so high capacity needs to be realized by increasing the area of low temperature adsorption plate. In limited size, the increase of area needs to be realized by adopting multi-stage structure, but low temperature adsorption plate needs to be used in cooperation with heat shielding baffle. Since the molecular flow conductance of multi-stage heat shielding baffle structure is smaller than that of single-layer heat shielding structure, it will result in the decrease of pumping speed of low temperature pump.

[0005] In prior art, the utility model patent application with patent number CN117386580A discloses an embedded type hydrogen pumping low temperature pump with blackbody-like radiation cavity, which comprises mounting flange, refrigerating machine mounted thereon, liquid nitrogen input pipe, nitrogen back gas pipe, front radiation shielding plate, back radiation shielding plate; the front radiation shielding plate is designed in V shape in cross section, and the sharp head faces the gas flow inlet; the back radiation shielding plate is designed in concave shape in cross section, and the opening is opposite to the V-shaped opening of the front radiation shielding plate with spacing, to form a blackbody-like radiation cavity; the cold head of the refrigerating machine is located in the blackbody-like radiation cavity. The front radiation shielding plate is designed in V shape, the back radiation shielding plate is designed in concave shape, and they form a blackbody-like radiation cavity, to improve the probability of collision and condensation of gas molecules on adsorption plate. The embedded type hydrogen pumping low temperature pump with blackbody-like radiation cavity is applied to neutral beam injection heating experiment, to obtain large pumping speed for hydrogen. However, the adsorbent in the patent adopts adhesive. UTILITY MODEL CONTENT

[0006] The utility model wants to solve the technical problem of providing a low temperature adsorption pump, both to solve the problem of low temperature adsorbent fixed, also want to increase the gas flow guide, guarantee enough big pumping speed.

[0007] To solve the above technical problems, the utility model provides the following technical scheme:

[0008] A low temperature adsorption pump suitable for fusion reactor, including heat shield baffle 30, supercritical helium pipeline 40, helium cryopanel 50, adsorption bin 60, high thermal conductivity plate 70 and gas baffle 80;

[0009] Supercritical helium pipeline 40, helium cryopanel 50, adsorption bin 60, high thermal conductivity plate 70 and gas baffle 80 are sequentially arranged in the heat shield baffle 10, and the adsorption bin 60 is filled with adsorbent.

[0010] Technical effect: the adsorbent that adsorption bin 60 can contain is the multiple of low temperature adsorption plate under the same area, especially forms low temperature adsorption array, and the difference is greater. Single-stage heat shield baffle 30 can also be used, to ensure high flow guide, which can not only achieve high pumping speed and large capacity, but also effectively solve the problem of active carbon falling during the operation of the low temperature adsorption pump, and can be used in future fusion devices and other strong neutron irradiation environments.

[0011] In an embodiment of the utility model, the side of adsorption bin 60 towards high thermal conductivity plate 70 is provided with an opening; high thermal conductivity plate 70 also serves as a baffle for the opening side of adsorption bin 60.

[0012] Technical effect: the combination of adsorption bin 60 and high thermal conductivity plate 70 can fix more active carbon than sticking active carbon to low temperature helium cold plate, thereby improving the gas adsorption capacity and increasing the regeneration period of the low temperature adsorption pump, and preventing active carbon from falling off due to external force and low temperature glue failure during installation and operation, which affects the performance and normal operation of the low temperature adsorption pump.

[0013] In an embodiment of the utility model, helium cryopanel 50 is tightly attached to the opposite side of the opening side of adsorption bin 60.

[0014] In an embodiment of the utility model, high thermal conductivity plate 70 is honeycomb-shaped.

[0015] Technical effect: the honeycomb-shaped high thermal conductivity plate 70 has good heat conduction performance, which can timely remove the heat of the incoming gas, further cool the gas, and the honeycomb-shaped flow holes make the gas flow into the active carbon adsorption bin 8 more evenly at different positions, ensuring the uniformity of active carbon adsorption.

[0016] In an embodiment of the utility model, supercritical helium pipeline 40 is fixed on helium cryopanel 50.

[0017] In an embodiment of the present application, the heat shielding baffle 30 is rectangular, and one of the main panels of the heat shielding baffle 30 is provided with an opening.

[0018] In an embodiment of the present application, the low-temperature adsorption pump comprises a heat insulation baffle 10, a liquid nitrogen pipeline 20, a heat shielding baffle 30, a gas baffle 80, a helium low-temperature plate 50, an adsorption bin 60 and a high-thermal-conductivity plate 70.

[0019] The heat insulation baffle 10 is located at the back of the heat shielding baffle 30, the liquid nitrogen pipeline 20 is located between the heat insulation baffle 10 and the heat shielding baffle 30, and the liquid nitrogen pipeline 20 is fixed at the back of the heat shielding baffle 30.

[0020] In an embodiment of the present application, the gas baffle 80 is in the shape of a "person", the end of the gas baffle 80 is fixedly connected with the vertical surface of the heat shielding baffle 30, and the baffle connection part of the "person"-shaped gas baffle 80 is provided with the liquid nitrogen pipeline 20 and is fixedly connected with the liquid nitrogen pipeline 20.

[0021] Technical effects: the heat shielding baffle 30 and the gas baffle 80 provide a stable radiation heat environment for the helium low-temperature plate 50, the adsorption bin 60 and the high-thermal-conductivity plate 70.

[0022] In an embodiment of the present application, the heat insulation baffle 10 comprises a first heat insulation baffle 11, a second heat insulation baffle 12 and a third heat insulation baffle 13 arranged in sequence, and the first heat insulation baffle 11 is provided with a lug structure.

[0023] The present application also provides a low-temperature adsorption array comprising the low-temperature adsorption pump suitable for fusion reactors, a plurality of low-temperature adsorption pumps, and being arranged on the inner wall of a vacuum chamber according to the connection mode of the supercritical helium pipeline 40.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] The present application can ensure that the activated carbon does not fall off without affecting the air pumping performance, and the flow guide ratio of the structure is high, which not only solves the problem of fixing the low-temperature adsorbent, but also increases the gas flow guide as much as possible to ensure a large enough pumping speed.

[0026] The low-temperature adsorption array can be used in a high radiation environment such as a fusion reactor, has high stability, and a structure convenient for space adjustment. The active carbon adsorption bin structure can make the adsorption capacity of the low-temperature adsorption pump larger and the regeneration period longer. The honeycomb high-thermal-conductivity plate can cool the gas and make the gas adsorption more uniform. The low-temperature adsorption pump has simple structure, high practicability and strong operability. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic view of a low-temperature adsorption pump suitable for a fusion reactor.

[0028] Figure 2 It is an enlarged view of a low-temperature adsorption pump.

[0029] Figure 3 It is a sectional view of a low-temperature adsorption pump. DETAILED DESCRIPTION

[0030] In order to facilitate those skilled in the art to understand the technical scheme of the present application, the technical scheme of the present application will be further described in conjunction with the drawings of the specification.

[0031] The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0032] Please refer to Figure 1 The present application provides a low-temperature adsorption pump suitable for a fusion reactor, which comprises: a heat insulation baffle 10, a liquid nitrogen pipeline 20, a heat shielding baffle 30, a supercritical helium pipeline 40, a helium low-temperature plate 50, an adsorption bin 60, a high-thermal-conductivity plate 70 and a gas baffle 80.

[0033] The heat insulation baffle 10 is located at the back of the heat shielding baffle 30, and the liquid nitrogen pipeline 20 is located between the heat insulation baffle 10 and the heat shielding baffle 30. The supercritical helium pipeline 40, the helium low-temperature plate 50, the adsorption bin 60, the high-thermal-conductivity plate 70 and the gas baffle 80 are sequentially arranged in the heat insulation baffle 10. The adsorption bin 60 is filled with an adsorbent. In use, the side of the gas baffle 80 faces the gas source.

[0034] Please refer to Figures 1 to 3 In an embodiment of the present application, the heat insulation baffle 10 comprises a first heat insulation baffle 11, a second heat insulation baffle 12 and a third heat insulation baffle 13 arranged in sequence, and the first heat insulation baffle 11 is provided with a lug structure mounted on the inner wall surface of the vacuum chamber.

[0035] In the embodiment, the first heat insulation baffle 11, the second heat insulation baffle 12 and the third heat insulation baffle 13 are all made of aluminum plate structure, the first heat insulation baffle 11 is fixed on the inner wall of the vacuum chamber by bolts, the second heat insulation baffle 12 is fixed on the first heat insulation baffle 11 by bolts, and the third heat insulation baffle 13 is fixed on the second heat insulation baffle 12 by bolts.

[0036] In the embodiment, the liquid nitrogen pipeline 20 is fixed on the back of the heat shield baffle 30, which can be understood as the opposite surface of the opening surface of the heat shield baffle 30. Specifically, the liquid nitrogen pipeline 20 and the heat shield baffle 30 are connected by welding.

[0037] In the embodiment, the heat shield baffle 30 is in a rectangular shape, and one of the main panels of the heat shield baffle 30 is provided with an opening. The rectangular heat shield baffle 30 has two main panels, and the other main panel serves as the back of the heat shield baffle 30.

[0038] In the embodiment, the supercritical helium pipeline 40 is fixed on the helium cryopanel 50, and specifically, the supercritical helium pipeline 40 and the helium cryopanel 50 are also connected by welding.

[0039] The adsorption chamber 60 is provided with an opening on the side facing the high thermal conductivity panel 70, and the high thermal conductivity panel 70 also serves as a baffle on the opening side of the adsorption chamber 60. The adsorption chamber 60 is filled with adsorbent, such as activated carbon, and based on the low-temperature condensation adsorption effect, the gas enters the adsorption chamber 60 through the high thermal conductivity panel 70 and is adsorbed by the adsorbent. Among them, the high thermal conductivity panel 70 is in a honeycomb shape. Specifically, the adsorption chamber 60 is fixed between the helium cryopanel 50 and the high thermal conductivity panel 70 by bolts.

[0040] In the embodiment, the gas baffle 80 is in a "person" shape, and the end of the gas baffle 80 is fixed to the vertical surface of the heat shield baffle 30. The baffle connection of the "person" shaped gas baffle 80 is provided with a liquid nitrogen pipeline 20, and is fixedly connected with the liquid nitrogen pipeline 20, so as to avoid direct radiation heat exchange between the helium cryopanel 50 and other components in the normal temperature vacuum chamber or the vacuum chamber, and to cool the helium cryopanel 50 through the liquid nitrogen pipeline 20.

[0041] Please refer to Figures 1 to 3As shown in the embodiment of the utility model, low temperature adsorption pump is installed in the vacuum chamber inner wall surface through the ear, and the gas baffle 80 faces the gas source. After the gas passes through the gas baffle 80, it enters the adsorption bin 60 through the high thermal conductivity plate 70, and completes low temperature adsorption. After the gas molecules of the incoming flow collide with the gas baffle 80, energy exchange occurs, and the gas molecules are cooled. When the gas molecules pass through the high thermal conductivity plate 70, the honeycomb-shaped high thermal conductivity plate 70 has good heat conduction performance, which can timely take away the heat of the incoming flow, realize further cooling of the gas, and the honeycomb-shaped flow hole makes the gas flow into the activated carbon adsorption bin 8 more evenly, ensuring the uniformity of activated carbon adsorption. The adsorption bin 60 and the high thermal conductivity plate 70 are cooled by the helium cryogenic plate 50. The heat shield baffle 30 and the gas baffle 80 provide a stable radiation heat environment for the helium cryogenic plate 50, the adsorption bin 60 and the high thermal conductivity plate 70. The adsorbent is filled into the adsorption bin 60 by filling, avoiding the use of low temperature glue and other adhesive objects for fixation, and improving the stability and service life of the low temperature adsorption pump.

[0042] In addition, the adsorbent that can be contained in the adsorption bin 60 of the embodiment is multiple times of the low temperature adsorption plate under the same area, especially the low temperature adsorption array, and the difference is larger. At the same time, a single-stage heat shield baffle 30 can also be used to ensure a high enough flow guide. In this way, not only high pumping speed and large capacity can be realized, but also the problem of activated carbon falling off during the operation of the low temperature adsorption pump can be effectively solved, and it can be used in future fusion devices and other strong neutron irradiation environments.

[0043] Please refer to Figures 1 to 3 As shown in the embodiment of the utility model, low temperature adsorption pump is installed in the vacuum chamber inner wall surface through the ear, and the gas baffle 80 faces the gas source. After the gas passes through the gas baffle 80, it enters the adsorption bin 60 through the high thermal conductivity plate 70, and completes low temperature adsorption. After the gas molecules of the incoming flow collide with the gas baffle 80, energy exchange occurs, and the gas molecules are cooled. When the gas molecules pass through the high thermal conductivity plate 70, the honeycomb-shaped high thermal conductivity plate 70 has good heat conduction performance, which can timely take away the heat of the incoming flow, realize further cooling of the gas, and the honeycomb-shaped flow hole makes the gas flow into the activated carbon adsorption bin 8 more evenly, ensuring the uniformity of activated carbon adsorption. The adsorption bin 60 and the high thermal conductivity plate 70 are cooled by the helium cryogenic plate 50. The heat shield baffle 30 and the gas baffle 80 provide a stable radiation heat environment for the helium cryogenic plate 50, the adsorption bin 60 and the high thermal conductivity plate 70. The adsorbent is filled into the adsorption bin 60 by filling, avoiding the use of low temperature glue and other adhesive objects for fixation, and improving the stability and service life of the low temperature adsorption pump.

[0044] For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0045] The above-described embodiments only represent the implementation manners of the utility model, and the protection scope of the utility model is not limited to the above-described embodiments, and for those skilled in the art, under the premise of not departing from the concept of the utility model, a plurality of modifications and improvements can be made, and these all belong to the protection scope of the utility model.

Claims

1. A cryosorption pump suitable for use in a fusion reactor, characterized in that, The heat shield baffle (30), the supercritical helium pipeline (40), the helium cryopanel (50), the adsorption chamber (60), the high thermal conductivity plate (70) and the gas baffle (80) are sequentially arranged in the heat insulation baffle (10), and the adsorption chamber (60) is filled with an adsorbent. The heat shield baffle (30), the supercritical helium pipeline (40), the helium cryopanel (50), the adsorption chamber (60), the high thermal conductivity plate (70) and the gas baffle (80) are sequentially arranged in the heat insulation baffle (10), and the adsorption chamber (60) is filled with an adsorbent.

2. The cryosorption pump for a fusion reactor according to claim 1, wherein The adsorption chamber (60) is provided with an opening on the side facing the high thermal conductivity plate (70), and the high thermal conductivity plate (70) simultaneously serves as a baffle of the opening side of the adsorption chamber (60).

3. The cryosorption pump for a fusion reactor according to claim 2, wherein The helium cryopanel (50) is tightly attached to the opposite side of the opening side of the adsorption chamber (60).

4. The cryosorption pump for a fusion reactor according to claim 2, wherein The high thermal conductivity plate (70) is in a honeycomb shape.

5. The cryosorption pump for a fusion reactor of claim 1, wherein The supercritical helium pipeline (40) is fixed on the helium cryopanel (50).

6. The cryosorptive pump for fusion reactors according to claim 1, characterized in that, The heat shield baffle (30) is in a rectangular shape, and one of the main panels of the heat shield baffle (30) is provided with an opening.

7. The cryosorptive pump for fusion reactors according to claim 1, characterized in that, The cryogenic adsorption pump comprises a heat insulation baffle (10) and a liquid nitrogen pipeline (20). The heat insulation baffle (10) is located at the back of the heat shield baffle (30), the liquid nitrogen pipeline (20) is located between the heat insulation baffle (10) and the heat shield baffle (30), and the liquid nitrogen pipeline (20) is fixed at the back of the heat shield baffle (30).

8. The cryosorption pump for a fusion reactor of claim 7, wherein The gas baffle (80) is in a "person” shape, the end of the gas baffle (80) is fixedly connected with the vertical surface of the heat shield baffle (30), and the baffle connection part of the "person”-shaped gas baffle (80) is provided with the liquid nitrogen pipeline (20) and is fixedly connected with the liquid nitrogen pipeline (20).

9. The cryosorption pump for a fusion reactor of claim 7, wherein, The heat insulation baffle (10) comprises a first heat insulation baffle (11), a second heat insulation baffle (12) and a third heat insulation baffle (13) which are sequentially arranged, and the first heat insulation baffle (11) is provided with a hanging ear structure.

10. A low temperature adsorption array, characterized in that, The cryogenic adsorption pump for fusion reactors, a plurality of cryogenic adsorption pumps and the arrangement of the supercritical helium pipeline (40) on the inner wall of the vacuum chamber according to the connection mode.

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