CN203655560U - Flange for pump, flange assembly for pump and multifunctional flange - Google Patents

Abstract

The utility model relates to a flange for a pump, a flange assembly for the pump and a multifunctional flange and aims to reduce condensation of moisture and accumulation of frost and ice around a flange of a low-temperature pump assembly as well as freeze of a pump driving device. The flange for the pump comprises a first surface, a second surface and a passage, wherein the passage extends from the first surface to the second surface, is used for a process fluid pipe and comprises a first part with a first diameter and a second part with a second diameter larger than the first diameter. When the process fluid pipe extends to pass through the passage, a gap exists between the inner wall of the second part of the passage and the process fluid pipe. With the adoption of the flange, compared with the arrangement that the second diameter equals the first diameter, the flange has the advantages that the thermal resistance between the process fluid pipe and the flange is increased by the gap, so that the cooling effect on the flange due to the fact that a low-temperature fluid flows through the pipe is reduced, and cooling of a warm end of the pump as well as condensation of the moisture and accumulation of the frost/the ice around a warm end assembly are reduced.

Description

For the flange of pump, for flange assembly and the Multifunctional flange of pump

Technical field

The application relates to a kind of condensation, frost and the accumulation of ice and layout of freezing of pump drive for the flange that reduces cryopump assembly moisture around, described in freeze to cause by the cryogen that flows through described flange in addition.

Background technique

In the time that gas stores with liquefied form, can store with much higher density.Compared with the pressurized gas storing with gas form, if gas at it below boiling point or boiling point (as the typical blend for rock gas, below approximately-161.5 DEG C) store with liquefied form, so just can be under relatively low pressure stored-gas.In the disclosure, " low temperature " for describe be in temperature fluid that this class is low and as the equipment of " cryopump ", it is designed to handle at low temperatures cryogen.

Known cryopump is for from adiabatic reservoir vessel delivering cryogenic fluid.This class cryopump has herein the part in the described cryogen of immersion that is called " cold junction ".Conventionally, cryogen is to be fed to storage tank from the place of pumping cryogen by gravity, or cold junction can comprise the pump assembly being positioned in the cryogen space being defined by reservoir vessel itself.Drive unit for this cryopump is referred to herein as " warm end ", and it is usually located at reservoir vessel outside to avoid introducing heat from drive unit to the cryogen space being defined by reservoir vessel.The delivery pipe that warm end also stretches out with cold junction with from reservoir vessel conventionally at intervals positioned apart and/or with they thermal insulation, to prevent freezing in drive unit, be particularly like this while activating the hydraulic driving machine of cryopump with hydraulic fluid pressure at drive unit.

Due to the limited space for fuel system is installed, often Existential Space restriction in vehicle application, and therefore preferred compacter layout.Therefore, it is fixedly favourable drive unit being fixed on the flange of sealed open or near flange, and pump assembly is to install through described opening.In addition, wish to reduce the number of the heat-transfer path between cryogen space and surrounding environment, therefore preferably make delivery pipe pass identical flange.But this may cause the hydraulic fluid in hydraulic driving machine to freeze.

Claimant designed and commercialization a kind of dissimilar cryopump, it comprise and pump assembly integrate vaporizer, as U.S. Patent number 7,607,898 is disclosed.Because the fluid ratio cryogenic flow body heat of vaporization, so while using this layouts, drive unit is not fixed on to the problem on the identical flange that delivery pipe passes through warming up end place.

But, for not using the system of cryopump of integrating with vaporizer, there are the needs to compact Layout, described layout allows warm end with being fixed on the identical flange that delivery pipe passes through or near the fixing drive unit of described flange.

Model utility content

For an improvement flange for pump, it comprises first surface and second and the passage for delivery of pipe from described first surface to described second extension.Described passage comprises the first portion with the first diameter and the second portion with the Second bobbin diameter that is greater than described the first diameter.In the time that described delivery pipe has the external diameter that is less than described Second bobbin diameter, between described delivery pipe and described delivery pipe are by the residing described passage of described second portion, form gap.Described delivery pipe can contact with the inwall of the first portion of passage.Described pump can be the cryopump for the reservoir vessel pumping cryogen from being fixed with flange.

In preferred embodiments, described gap is annular.Described passage can with described first surface and described second at least one bevel.Form the first opening in the described first portion of described passage and the intersection of described first surface, and form the second opening at the described second portion of described passage and the intersection of described second.Preferably, compared with described the second opening, described the first opening is farther from the longitudinal axis of the fixed position of drive unit.Described the second opening can be positioned at by sleeve pipe around region, when mounted, described pump is inserted in described sleeve pipe.

A kind of improvement flange assembly for pump comprises process fluid pipe and flange.Described flange comprises first surface, second and the passage for process fluid pipe from first surface to second extension.Described passage comprises the first portion with the first diameter and the second portion with Second bobbin diameter, is greater than described the first diameter so as to described Second bobbin diameter.In the time that described process fluid pipe extends through described passage, between the inwall of the described second portion of described passage and process fluid pipe, there is gap.

In a preferred embodiment, described flange comprises hole, and described hole extends and have to described second the diameter that equals described Second bobbin diameter from described first surface.Described flange assembly further comprises ring, and described ring has the internal diameter that equals described the first diameter.Described passage is by described ring is inserted in described hole and formed.

Described process fluid pipe can be soldered to flange.In a preferred embodiment, described flange is disc, but may be other shape in other embodiments.Described passage can with described first surface and described second at least one bevel.Form the first opening in the described first portion of described passage and the intersection of described first surface, and form the second opening at the described second portion of described passage and the intersection of described second.In a preferred embodiment, compared with described the second opening, described the first opening is farther from the longitudinal axis of described flange.

A kind of Multifunctional flange that improves, for being connected to the companion flange on reservoir vessel, be used for supporting pump assembly and for fixed hydraulic drive unit, this Multifunctional flange comprises first surface, second and the passage for delivery of pipe from described first surface to described second extension.Described passage comprises the first portion with the first diameter and the second portion with the Second bobbin diameter that is greater than described the first diameter.In the time that described delivery pipe has the external diameter that is less than described Second bobbin diameter, between described delivery pipe and described delivery pipe are by the described passage described in described second portion, form gap.Described delivery pipe can contact with the inwall of the described first portion of described passage.In a preferred embodiment, described Multifunctional flange comprises at least one hydraulic fluid channel being communicated with described fluid pressure drive device fluid.

Brief description of the drawings

Fig. 1 is the schematic diagram of cryopump.

Fig. 2 is the cross section partial view that the pump of Fig. 1 inserts the double-walled low-temperature (low temperature) vessel in sleeve pipe.

Fig. 3 is the simplification viewgraph of cross-section of the warm end assembly of the pump of Fig. 1.

Fig. 4 is according to the viewgraph of cross-section of the flange of the pump of Fig. 1 of the first embodiment.

Fig. 5 is according to the viewgraph of cross-section of the flange assembly of the pump of Fig. 1 of the second embodiment.

Fig. 6 is the exploded view of the flange assembly of Fig. 4.

Fig. 7 and Fig. 8 are the schematic diagram of the ring of the flange assembly of Fig. 4.

Fig. 9 is the viewgraph of cross-section of the ring of Fig. 8 of 8-8 ' intercepting along the line.

Embodiment

Consult Fig. 1, show the cryopump 10 that comprises warm end assembly 20 and cold junction assembly 30.Process fluid pipe 40 (also referred to as delivery pipe) is carried from the cryogen of cold junction assembly 30 pumpings by the flange 50 in warm end assembly 20.Pipe 40 with to another low-temperature (low temperature) vessel (in the time that system shifts cryogen, for example, in the time that dress is filled with the fuel tank of vehicle) or to the exterior tube (not shown) connection of external carburettor (in the time that cryogen is used by terminal user with gas form, for example, when cryogen is when driving the rock gas of vehicle to internal-combustion engine fueling) delivering cryogenic fluid.Consult Fig. 1 and Fig. 3, shown for the compact Layout near the fixing fluid pressure drive device of flange 50, hydraulic fluid channel 60 and 70 is for to cause that piston 80 produces reciprocating well-known mode to the inside and outside delivering hydraulic fluid of cylinder 75.Passage 60 and 70 is connected to external hydraulic conduit (not shown) by joint 90 and 100.

Consult now Fig. 3 and Fig. 4, passage 110 is provided in flange 50, the opening 125 of described passage from face 52 extends to the opening 135 in face 54.Passage 110 comprises first portion 120 and second portion 130, and they are columniform hole in this embodiment.The diameter of first portion 120 is less than the diameter of second portion 130.In the time that process fluid pipe 40 is assembled in passage 110, it contacts with the inwall 145 of first portion 120, but has gap 140 between pipe and the inwall 150 of second portion 130.In other embodiments, at least between the first portion 120 of the part of the outer surface of pipe, can there is limited space at pipe 40 and passage 110.In the present embodiment, gap 140Shi annular space.Process fluid pipe 40 is to be fastened on flange 50 by weld seam 160.Depend on application requirements, may adopt in other embodiments mechanical arrangement or tackiness agent that pipe 40 is fastened on flange 50, maybe can adopt other known technology.

Because the area of contact between pipe and flange reduces, so gap 140 raises the thermal resistance between process fluid pipe 40 and flange 50.Conventionally pipe 40 and flange 50 are all made of metal, and Metal Phase is better heat conductors than the gap 140 that is full of air.Gap reduces the cooling action that cryogen flows through on pipe 40 flanges that cause 50, thereby condensation and the frost/embacle of the possibility that minimizing hydraulic fluid freezes and the warm end of minimizing assembly 20 moisture around amass.

Passage 110 and the equal bevel of face 52 and 54, to make opening 125 more farther from the longitudinal axis 15 than opening 135.Consult now Fig. 2, in the time that cryopump 10 is installed in reservoir vessel 25, as shown in Figure 2, its most of length is preferably contained in sleeve pipe 35, thereby makes opening 135 be positioned at sleeve pipe, and in sleeve pipe, described pump is not directly exposed in cryogen space.Reservoir vessel 25 is the double-walled containers that comprise outer wall 26 and inwall 27.In preferred embodiments, vacuum space 45 provides the insulation of the extra heat between sleeve pipe 35 and cryogen space 55.The advantage that the oblique angle of passage 110 has be make to manage 40 and the inwall 145 of passage 110 between surface of contact away from passage 60 and 70 and cylinder 75 in hydraulic fluid.The effect that this thermal resistance that plays the hot path between hydraulic fluid and the cryogen that makes to manage in 40 raises.In other embodiments, compared with opening 135, opening 125 can be positioned at distance that distance axis 15 is identical or nearer position.In a preferred embodiment, process fluid pipe 40 is fastened on flange 50 by sealing 160, to make the gaseous fuel steam between sleeve pipe 35 and pump 10 can not escape into external environment condition.Compared with opening 135, preferably manage 40 and be welded on flange 50 at opening 125, opening 135 tend to make to manage 40 and cylinder 75 and passage 70 between heat transmission increase.

Consult now Fig. 5 to Fig. 9, show another embodiment, wherein there is same reference numbers and if any may also can not discuss in detail with the same section of previous embodiment.Flange 50 comprises the hole 200 of extending to face 54 from face 52.The form that ring 210 is hollow cylindrical tube conventionally, thus it is inserted into and in hole 200, forms passage 110 and the one 120 and second portion 130.Ring 210 can be fastened on flange 50 with various ways.As non-limiting example, ring 210 can be pressed in hole 200 or be interference fit in hole 200, be slidably matched in hole and come fasteningly by tackiness agent or welding, by the combination of these technology or by other known technology, each several part mechanically being tightened together.

Although shown and described concrete element of the present utility model, embodiment and application, it should be understood that, the utility model is not limited to described concrete element, embodiment and application, because not departing from the scope of the present disclosure, especially according to the aforementioned instruction in the situation that, those skilled in the art can modify.

Claims (16)

1. for a flange for pump, it comprises:

First surface;

Second;

For delivery of the passage of pipe, it is from described first surface to described second extension, and described passage comprises the first portion with the first diameter and the second portion with the Second bobbin diameter that is greater than described the first diameter;

Wherein in the time that described delivery pipe has the external diameter that is less than described Second bobbin diameter, so as to form gap between described delivery pipe and described delivery pipe are by the residing described passage of described second portion.

2. flange as claimed in claim 1, wherein said delivery pipe contacts with the inwall of the described first portion of described passage.

3. flange as claimed in claim 1, wherein said pump is the cryopump for the reservoir vessel pumping cryogen from being fixed with described flange.

4. flange as claimed in claim 1, wherein said gap is annular.

5. flange as claimed in claim 1, at least one bevel in wherein said passage and described first surface and described second.

6. flange as claimed in claim 1, wherein form the first opening in the described first portion of described passage and the intersection of described first surface, and form the second opening at the described second portion of described passage and the intersection of described second, compared with described the second opening, described the first opening is farther from the longitudinal axis of the fixed position of drive unit.

7. flange as claimed in claim 6, wherein said the second opening be positioned at by sleeve pipe around region, when mounted, described pump is inserted in described sleeve pipe.

8. for a flange assembly for pump, it comprises:

Process fluid pipe;

Flange, it comprises:

First surface;

Second;

For the passage of described process fluid pipe, it is from described first surface to described second extension, and described passage comprises the first portion with the first diameter and the second portion with Second bobbin diameter, is greater than described the first diameter so as to described Second bobbin diameter;

Wherein in the time that described process fluid pipe extends through described passage, between the inwall of the described second portion of described passage and described process fluid pipe, there is gap.

9. flange assembly as claimed in claim 8, wherein said flange comprises hole, described hole extends and comprises to described second the diameter that equals described Second bobbin diameter from described first surface, described flange assembly further comprises ring, described ring comprises the internal diameter that equals described the first diameter, and described passage is by inserting described ring in described hole and form.

10. flange assembly as claimed in claim 8, wherein said process fluid pipe is welded on described flange.

11. flange assemblies as claimed in claim 8, wherein said flange is disc.

12. flange assemblies as claimed in claim 8, wherein said gap is annular.

13. flange assemblies as claimed in claim 8, at least one bevel in wherein said passage and described first surface and described second.

14. flange assemblies as claimed in claim 8, wherein form the first opening in the described first portion of described passage and the intersection of described first surface, and form the second opening at the described second portion of described passage and the intersection of described second, compared with described the second opening, described the first opening is farther from the longitudinal axis of described flange.

15. 1 kinds of Multifunctional flanges, for being connected to the companion flange on reservoir vessel, for supporting pump assembly and for fixed hydraulic drive unit, described Multifunctional flange comprises:

First surface;

Second;

For delivery of the passage of pipe, it is from described first surface to described second extension, and described passage comprises the first portion with the first diameter and the second portion with the Second bobbin diameter that is greater than described the first diameter;

Wherein in the time that described delivery pipe has the external diameter that is less than described Second bobbin diameter, so as to form gap between described delivery pipe and described delivery pipe are by the residing described passage of described second portion.

16. Multifunctional flanges as claimed in claim 15, it comprises at least one hydraulic fluid channel being communicated with described fluid pressure drive device fluid.

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