CN2434507Y

CN2434507Y - Multifunctional vacuum valve

Info

Publication number: CN2434507Y
Application number: CN 00223441
Authority: CN
Inventors: 吴同文; 吴胜; 吴炜
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-21
Filing date: 2000-06-21
Publication date: 2001-06-13
Anticipated expiration: 2010-06-21

Abstract

The utility model relates to a multifunctional vacuum valve mainly used in vacuum pumping, measure and seal of a thermal insulation layer of a lower temperature liquid vessel. The vacuum valve is composed of a valve body, a valve core, an air inlet end, an air pumping end, etc., wherein, the air pumping end is connected with a vacuum seal mechanism which comprises a casing connected with the air pumping end, a seal nozzle with the same shape of an air pumping opening of the vacuum valve and a vacuum seal valve. A slide bar of the seal valve is provided with a seal ring, and the seal ring can slide and is arranged in the inner cavity of the casing. The seal nozzle is arranged at the top end of the slide bar, and the casing is provided with an air pumping opening of a vacuum pump. The utility model has the advantages of simple structure and simple operation of vacuum seal.

Description

The multifunctional vacuum valve

The utility model relates to vacuum valve, especially for the cryogenic liquid vessel heat insulation layer vacuumize, the valve of measurement and sealed knot makes the field.

Along with the continuous development of China's Aerospace Technology and national economy, be called huge day by day the increasing of cryogenic liquide (liquid oxygen, liquid nitrogen, liquid argon) demand of " industrial blood " by people.Because these cryogenic liquide boiling temperatures all below-180 ℃, therefore, be got off they long preservation, best adiabatic method and effective bunkerage must be arranged.For a long time, use vacuum pump, pass through the vacuum valve extracting vacuum, particularly to vacuum-powders insulation with the container interlayer extracting vacuum of high vacuum multiple layer heat insulation, as in manufacture process with the cryogenic liquid tank of pearlife vacuum-powders insulation, its to pearlife powder isolation layer vacuumize applied vacuum valve, evacuation tube, vacuum measurement is regulated and last vacuum sealed knot tooling device, exists many shortcoming and defect.The first, above-mentioned parts all are to be designed to single independent component, especially vacuum measurement to regulate the different parts that is separately positioned on storage tank with vacuum valve, and this has just increased the welding part on the storage tank; The vacuum valve valve body adopts stainless steel garden pipe fitting to be welded, and the defective of this structure is that weld seam is many, has increased the hidden danger of leaking, and perforate and welding on the pipe of garden, complex process, turning can not be carried out in the weld seam of postwelding and surface, thereby has influenced appearance quality.Second; vacuum sealed knot mode falls behind; use and the life-span in order to guarantee that cryogenic liquid vessel is normal; prevent that atmosphere is from the vacuum valve end heat insulation layer that bleeds of bleeding; at present; the method that adopts is to make a call to a hole on flange; the diameter 12 * 2 of burn-oning; the lead pipe that length is 100 millimeters; flange is sealed with Bolt Connection and by teflon zero type circle; when cryogenic liquid vessel heat insulation layer degree of vacuum reaches requirement; and, the lead pipe on the blind flange connected with vacuum pump pumping chamber is found time under the dead situation of vacuum valve complete shut-down; after degree of vacuum reaches requirement, the lead pipe folder is extremely cut off with clamp specially; otch is with the soldering jail protective cap of burn-oning again, and the main defective of this method is need carry out finding time the second time.Time-consumingly prolonged the manufacture cycle.The 3rd, the evacuation tube making is loaded down with trivial details and filter dirt effect is not good enough.At present, be used in the evacuation tube on the cryogenic liquid vessel of vacuum-powders insulation, in fact adopt a kind of structural type, be that 4 millimeters steel plate bar strikes out 40 * 40 millimeters zigzag steel promptly with thickness, then, periphery along Z bar is wrapped up several layers with thin copper wire cloth, and seam crossing is used the soldering jail, again with fastening with copper wire after the no fat glass cloth bag plural layer.The defective of this evacuation tube is the manufacturing process complexity, and consumable quantity is big, and is time-consuming, destroys easily copper wire cloth and glass cloth in manufacture process, do not have the effect that stops and filter the pearlife dust, causes reprocessing or scrapping of product.Simultaneously, Z-shaped structure can really play two faces that have only of sucking filtering dust effect, and effect is unsatisfactory.

The purpose of this utility model is to provide a kind of multifunctional vacuum valve at the shortcoming and defect part of prior art, and it can once finish the operation of vacuum sealed knot easily under evacuation system is in vacuum state.

The purpose of this utility model realizes by following design: a kind of multifunctional vacuum valve, mainly form vacuum valve by valve body, the spool that is covered with bellows, inlet end and the end of bleeding; The end of bleeding of vacuum valve is connected with vacuum sealed knot mechanism, it comprises with the plunger type sealed knot that this bleed housing that connects of end and shape and vacuum valve bleeding point matched, were provided with seal ring chews and vacuum sealed knot valve, the slide bar of this vacuum sealed knot valve is provided with seal ring, and place this housing inner chamber slidably, sealed knot is chewed and is placed the top end of sliding rod position; Above-mentioned housing is provided with the bleeding point that is used to connect vacuum pump.

According to said structure, in case finish vacuum pumping technique, vacuum valve closes after death, also be under the high vacuum state in evacuation system, by means of the slide bar of vacuum sealed knot valve sealed knot chewed and be pushed to the vacuum valve bleeding point and compress, withdraw from slide bar and promptly finish the work of vacuum sealed knot, its superiority is simple in structure, easy to operate, do not need to find time for the second time, not only saving of labor but also save time.

Below in conjunction with accompanying drawing the utility model is described in detail.

Fig. 1 is sectional drawing of the present utility model (the vacuum valve spool is positioned at the gas circuit closed condition);

Fig. 2 is the sectional drawing that device is regulated in the vacuum measurement along A-A line direction shown in Figure 1;

Fig. 3 is evacuation tube shown in Figure 1 and the vacuum valve fragmentary cross-sectional view when being provided with by same axis;

Fig. 4 is that sealed knot shown in Figure 1 is chewed the fragmentary cross-sectional view under the sealed knot state;

Fig. 5 is a sectional drawing of being with the plunger type vacuum valve of regulating.

Fig. 1 illustrates, vacuum valve 1 mainly (is installed on its valve rod and is covered with bellows 11 by valve body, spool 12, valve top is the different requirements of degree of vacuum height when using, and select metal or the nonmetal sealing material of doing respectively for use), inlet end (forming), the end of bleeding (forming) by bleeding point 15, bleeding point flange 16 by suction port 13, suction port flange 14.The vacuum valve end of bleeding connects with the housing of vacuum sealed knot mechanism, can do detachably connection by flange, and vacuum sealed knot mechanism comprises that the plunger type sealed knot chews 4 and vacuum sealed knot valve 5.Sealed knot chews 4 profiles and bleeding point 15 matches, and sealed knot is chewed and is provided with three road teflon, zero RunddichtringO; The slide bar 51 of vacuum sealed knot valve 5 is provided with five roads, zero RunddichtringO, and slide bar places its housing inner chamber slidably, and sealed knot is chewed and placed the top end of sliding rod position, as, can directly place or through thread bush at top end of sliding rod.This slide bar is equipped with handle on the termination by the housing sponson.The corresponding bleeding point 52 that is used to connect vacuum pump that is provided with on this housing, this bleeding point is provided with flange 53.Also be provided with bleed valve 6 on this housing.This vacuum closing machine structure be for vacuum state next time property finish vacuum sealed knot technology and design, it and the vacuum valve pipe-line system of finding time organically joins together, in case finish vacuum pumping technique, close dead vacuum valve, promote slide bar 51 outer end handles forward, sealed knot can be chewed bleeding point 15 positions of delivering to setting, finish sealed knot easily and reliably, the sealed knot shown in Fig. 4 is chewed 4 situations that are positioned at bleeding point 15.The hollow metal powder tube that evacuation tube 2 adopts metallic dust to form around knot can be according to the requirement of dust filtration, and design and definite metallic dust granularity and density size are to guarantee necessary porosity ratio and pore size.It has overcome existing Z-shaped evacuation tube and has had only the two sides to play filtration, has the intensity height, and filter capacity is big, is easy to install the advantage of replacing.Evacuation tube 2 can be done detachable the connection by its suction port 13 and flange thereof with the vacuum valve inlet end.Evacuation tube can be the rectangular mode of evacuation tube axis and valve core axis (cut-off type) or can be that the two is by same axial direction setting (rectangular shape) by Fig. 3 mode with connecting of vacuum valve valve body by Fig. 1 mode.Among Fig. 2, vacuum measurement is regulated device and constituted: pedestal 31 connects with the vacuum valve valve body, can adopt scyewed joint, and communicates with body cavity, regulates cover cap 32 and connects with base thread, and the plunger tip 33 that has pore places the pedestal inner chamber versatilely with capping 34; Spring 35 1 ends are fixed on the pedestal, and the other end and capping connect firmly, spring reset situation as shown in Figure 2, and capping is crimped on the shoulder of pedestal inner chamber, and (gas circuit sealing this moment) this shoulder is provided with zero RunddichtringO 36; During use, cover cap 32 is regulated in turn, it is 3 stressed and push the capping that is crimped on the shoulder open that vacuum measurement is regulated, gas circuit is opened, work is regulated in vacuum measurement, it communicates with vacuum vessel by the vacuum valve inner chamber, needn't be in addition special perforate setting on vacuum vessel, reduced the weld seam and the easy leakage point of vacuum vessel, simultaneously, can be in the situation that does not influence vacuum vessel degree of vacuum fully, safety replacing vacuum measurement is regulated and (for satisfying vacuum-powders insulation rough vacuum measurement requirement and vacuum multi-layer insulation condition of high vacuum degree measurement requirement, is adopted High Voltage metal ionization gauge, replace existing thermalcouple type metal and regulate, its filament is X-shape, is easy to fracture).Fig. 5 illustrates evacuation tube 2, device is regulated in vacuum measurement and sealed knot is chewed 4 composition plunger type vacuum valves.Its superiority is that structure simple especially (having saved vacuum valve among Fig. 1), cost are low, simultaneously simple to operate, has reliability preferably.Vacuum valve valve body cross-sectional profile adopts square body (rectangle or square), material is stainless copper, valve body is that whole block material turning forms, itself does not have weld seam valve body, overcome the leakage hidden danger that causes because of weldquality, the valve body appearance is designed to square structure, and perforate and welding are taken over conveniently on square body.Simultaneously, the weld seam of postwelding and the appearance of valve body all can be carried out turning processing, thereby have improved the appearance quality of vacuum valve.This vacuum valve name latus rectum: DN10, DN15, DN20, DN25, DN30, DN40, DN50, DN60 series.

The utility model has overcome the multiple shortcoming and defect part that aforementioned prior art exists, to former There are single parts to re-start optimal design, are combined into an organic whole, further improve it Manufacturability, practicality and advance promote cryogenic liquid vessel, storage tank, tank car in manufacture process In the key sealed knot technology of finding time carried out once reforming and improving, thereby make its manufacture level and make Jump onto a new step with performance, stride into the similar products at home and abroad advanced level.

Claims

1, a kind of multifunctional vacuum valve is characterized in that, mainly by valve body, be covered with spool (12), the inlet end of bellows (11) and the end of bleeding is formed vacuum valve (1); The end of bleeding of vacuum valve (1) is connected with vacuum sealed knot mechanism, it comprises with the plunger type sealed knot that this bleed housing that connects of end and shape and vacuum valve bleeding point (15) matched, were provided with seal ring chews (4) and vacuum sealed knot valve (5), the slide bar (51) of this vacuum sealed knot valve is provided with seal ring, and place its housing inner chamber slidably, sealed knot is chewed (4) and is placed the top end of sliding rod position; The housing of above-mentioned vacuum seal mechanism is provided with the bleeding point (52) that is used to connect vacuum pump.

2, multifunctional vacuum valve according to claim 1 is characterized in that, the housing of described vacuum seal mechanism connects by flange with the bleeding point (15) of vacuum valve (1).

3, multifunctional vacuum valve according to claim 1 is characterized in that, is connected with the evacuation tube of being made by the metallic dust pipe (2) on described vacuum valve (1) inlet end.

4, multifunctional vacuum valve according to claim 3 is characterized in that, the axis of described evacuation tube (2) and vacuum valve (1) valve core axis are by rectangular direction setting.

5, multifunctional vacuum valve according to claim 3 is characterized in that, described evacuation tube (2) is pressed same axial direction setting with vacuum valve (1) spool.

6, multifunctional vacuum valve according to claim 3 is characterized in that, described evacuation tube (2) connects by flange with vacuum valve (1) inlet end.

7, according to any one described multifunctional vacuum valve in the claim 1 to 6, it is characterized in that, described vacuum valve (1) valve body is provided with vacuum measurement and regulates device, it is constructed as follows: pedestal (31) connects with this valve body, and communicate with body cavity, regulate cover cap (32) and connect, offer leachy plunger tip (33) and place the pedestal inner chamber versatilely with capping (34) with this base thread; One end of spring (35) is fixed on the pedestal, and the other end and capping connect firmly, and during spring reset, capping is crimped on the shoulder of pedestal inner chamber; This shoulder is provided with zero RunddichtringO (36).

8, multifunctional vacuum valve according to claim 7 is characterized in that, described pedestal (31) and vacuum valve (1) valve body are through scyewed joint.

9, multifunctional vacuum valve according to claim 8 is characterized in that, the housing of described vacuum seal mechanism is provided with bleed valve (6).

10, multifunctional vacuum valve according to claim 9 is characterized in that, the profile of described vacuum valve (1) valve body cross section is square.