Cryogenic pump sump
Technical field
The application relates to a kind of cryogenic pump sump, particularly relates to a kind of evacuation for cryogenic pump sump heat insulation
Structure.
Background technology
In low-temperature pressure container, during by immersed pump transmission cryogenic liquid, during for ensureing immersed pump work
Being constantly in low temperature state, current way is to be placed in by immersed pump in an adiabatic cryogenic pump sump.Low
Equipped with feed tube, muffler on the pump cell body in temperature pump pond, mounting flange is welded as one with the oral area of pump cell body
Body, immersed pump is directly anchored to below the blind flange as pump basin lid, and blind flange passes through Stud connection solid
Determine on flange, between blind flange and mounting flange, be lined with gasket seal, blind flange has a through hole, goes out liquid
Pipe is directly welded on blind flange, and cryogenic liquid is flowed in drain pipe by this through hole.
The purpose of Cryo Heat Insulation is intended to manage reduce and leaks into low temperature by approach such as convection current, heat conduction and radiation and set
Standby heat, Cryo Heat Insulation technology is one of widest basic technology in whole cryogenic engineering field.
At present, the type of Cryo Heat Insulation has: accumulation thermal insulation, high-vacuum insulation, vacuum powder and fiber insulation,
High vacuum multiple layer heat insulation.
Along with the development of cryogenic technique industry, cryogenic pump sump is widely used in cryogenic pipeline system, low
Temperature has been related to whole system performance quality at the design in pump pond, service life.
In traditional design, pump basin lid is located immediately at the top of cryopump (cryogenic liquid), at cryogenic pump sump
In the case of using always, pump basin lid has serious frosting, directly affects the thermal leakage ratio of cryogenic pump sump,
And safeguard very inconvenient.
Utility model content
The purpose of this utility model is to provide a kind of cryogenic pump sump, to overcome deficiency of the prior art.
For achieving the above object, the following technical scheme of this utility model offer:
The open a kind of cryogenic pump sump of the embodiment of the present application, described cryogenic pump sump include pump cell body, pump basin lid,
Cryopump and drain pipe, described pump basin lid is sealed in the top end opening of described pump cell body, and described cryopump sets
Being placed in described pump cell body, one end of described drain pipe extends in described pump cell body through described pump basin lid
And be connected with described cryopump, the lower section of described pump basin lid has protruded out little end socket, and this drain pipe is through described
Little end socket, the sealing bottom surface of the tip edge of described little end socket and described pump basin lid fixes, described little end socket
And surrounding a vacuum cavity between the bottom surface of described pump basin lid, the maximum gauge of described little end socket is equal to described
The opening inside diameter of pump cell body.
Preferably, in above-mentioned cryogenic pump sump, described little end socket include columnar main part and
What main body bottom edge protruded out downwards has the sealing of spherical surface, described main part, sealing
And between pump basin lid, surrounding described vacuum cavity, the external diameter of described main part is equal to the opening of described pump cell body
Internal diameter.
Preferably, in above-mentioned cryogenic pump sump, the outer sheath of described drain pipe is provided with vacuum tube, described
Vacuum tube is positioned at one end of described vacuum cavity and offers air-vent, and described vacuum tube is positioned at described pump pond
One end of external body is provided with evacuation hole.
Preferably, in above-mentioned cryogenic pump sump, described pump cell body includes inner core and is sheathed on described interior
Urceolus outside Tong, described interior tube outer surface is wound with heat-insulation layer.
Preferably, in above-mentioned cryogenic pump sump, the tip edge of described pump cell body is fixed with flange, institute
State and removably connect between pump basin lid and described flange.
Preferably, in above-mentioned cryogenic pump sump, described pump basin lid is provided with cable tube, and this cable tube divides
Chuan Guo described pump basin lid and little end socket seal fixing with described pump basin lid and little end socket.
Preferably, in above-mentioned cryogenic pump sump, described pump basin lid is provided with blow-off pipe, and this blow-off pipe divides
Chuan Guo described pump basin lid and little end socket seal fixing with described pump basin lid and little end socket.
Preferably, in above-mentioned cryogenic pump sump, described pump basin lid is provided with temperature element pipe, this thermometric
Element tube is each passed through described pump basin lid and little end socket and seals fixing with described pump basin lid and little end socket.
Preferably, in above-mentioned cryogenic pump sump, described pump basin lid is provided with blow-down pipe, and this blow-down pipe divides
Chuan Guo described pump basin lid and little end socket seal fixing with described pump basin lid and little end socket.
Compared with prior art, the utility model has the advantage of:
This is the most novel by being welded in pump basin lid by the end socket of a certain specification, and with drain pipe vacuum line and
Pump basin lid upper pipeline is connected as an entirety, beats several air-vent, by going out on drain pipe vacuum line
Vacuum orifice on liquid pipe vacuum tube road carries out evacuation process, forms one in making this end socket institute coating space
Individual vacuum, effectively by cryopump (cryogenic liquid) and pump basin lid vacuum insulation, such cryogenic pump sump exists
Under the situation of life-time service, pump basin lid also will not produce frost, improves the usability of cryogenic pump sump
Can, to the maintenance of whole pipeline advantageously.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only some embodiments described in the application, for those of ordinary skill in the art
From the point of view of, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 show the structural representation of cryogenic pump sump in this utility model specific embodiment;
Fig. 2 show the top view of cryogenic pump sump in this utility model specific embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the technology in this utility model embodiment
Scheme is described in detail, it is clear that described embodiment is only that this utility model part is implemented
Example rather than whole embodiments.Based on the embodiment in this utility model, ordinary skill people
The every other embodiment that member is obtained on the premise of not making creative work, broadly falls into this practicality
Novel protected scope.
Shown in Fig. 1 and Fig. 2, cryogenic pump sump includes pump cell body 1, pump basin lid 2, cryopump 3 and goes out
Liquid pipe 3, pump basin lid 2 is sealed in the top end opening of pump cell body 1, and cryopump 3 is arranged in pump cell body 1,
One end of drain pipe 3 passes in pump basin lid 2 extends pump cell body 1 and is connected with cryopump 3, pump basin lid 2
Lower section protruded out little end socket 4, this drain pipe pass described little end socket, the tip edge of little end socket 4 and pump
The sealing bottom surface of basin lid 2 is fixed, and surrounds a vacuum cavity 5 between little end socket 4 and the bottom surface of pump basin lid 2,
The maximum gauge of little end socket 4 is equal to the opening inside diameter of pump cell body 1.
Little end socket 4 includes that columnar main part 401 and main body 401 bottom edge protrude out downwards
The sealing 402 with spherical surface, surround between main part 401, sealing 402 and pump basin lid 2
Vacuum cavity 5, the external diameter of main part 401 is equal to the opening inside diameter of pump cell body 1.
In this technical scheme, the diameter of main part is preferably equal to pump cell body opening inside diameter, when pump basin lid button
Closing after fixing, main part is fitted with pump cell body opening, it is achieved certain sealing function.
The outer sheath of drain pipe 3 is provided with vacuum tube 6, and vacuum tube 6 is positioned at one end of vacuum cavity 5 and offers
There are air-vent 601, vacuum tube 6 to be positioned at the one end outside pump cell body 1 and are provided with evacuation hole 602.
In this technical scheme, the inside evacuation to vacuum cavity can be realized by vacuum tube.
Pump cell body 1 includes inner core 101 and is sheathed on the urceolus 102 outside inner core, inner core 101 outer surface
It is wound with heat-insulation layer 103.
Heat-insulation layer 103 is formed by all-glass paper and aluminium foil alternately covering.
In this technical scheme, pump cell body uses double-layered cylinder structure, and inner bag uses fine vacuum multi-lay winding
Structure is incubated thermal insulation.
The tip edge of pump cell body 1 is fixed with flange 7, removably connects between pump basin lid 2 and flange 7.
In this technical scheme, because cryopump needs to be positioned in cryogenic pump sump, therefore cryogenic pump sump needs design
For flange connection, facilitate putting into of cryopump.
Further, pump basin lid 2 is provided with cable tube c, blow-off pipe d, temperature element pipe e and blow-down pipe
H, this cable tube, blow-off pipe, temperature element pipe and blow-down pipe are each passed through pump basin lid and little end socket and pump
Basin lid and little end socket seal fixing.
In this technical scheme, cable tube, blow-off pipe, temperature element pipe and blow-down pipe are real by little end socket
Now connect with in pump cell body, but the sealing of vacuum cavity can not be affected.
To sum up, this case, can by setting up the little end socket with vacuum cavity between pump basin lid and immersed pump
To be separated by the gas-phase space of pump cell body, effectively stop the gaseous exchange of gas-phase space, reduce cryogenic liquid
With the heat exchange of pump basin lid, thus the problem solving the serious frosting in blind flange surface.
It should be noted that in this article, term " includes ", " comprising " or its any other variant are intended to contain
Comprising of lid nonexcludability, so that include the process of a series of key element, method, article or equipment
Not only include those key elements, but also include other key elements being not expressly set out, or also include for
The key element that this process, method, article or equipment are intrinsic.
The above is only the detailed description of the invention of the application, it is noted that general for the art
For logical technical staff, on the premise of without departing from the application principle, it is also possible to make some improvement and profit
Decorations, these improvements and modifications also should be regarded as the protection domain of the application.