CN2406242Y

CN2406242Y - Micro-wave diminishing pot

Info

Publication number: CN2406242Y
Application number: CN 00205598
Authority: CN
Inventors: 王书业
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-02-28
Filing date: 2000-02-28
Publication date: 2000-11-15
Anticipated expiration: 2010-02-28

Abstract

The utility model relates to a micro-wave diminishing pot for doing chemical diminishment for analytic samples under uniform temperature and pressure, which is provided with a double structure of an inner cup and an outer barrel. The inner cup is made of fluorine plastics. A decompression hole is arranged on a cup cover. By a valve core and a voltage limiting cover, a safe valve type protective action is obtained. A junction plane with an automatic sealing performance is arranged between the cup cover and the cup barrel. The outer barrel is composed of a barrel wall made of composite material, an upper cover and a lower cover. A base supporting plate is arranged below the inner cup. By a roof terrace, the inner cup can be conveniently taken out. The utility model is suitable for doing the pre-treatment of chemical analysis samples in the technical fields of petroleum, chemical industry, mine, metallurgy, food, environmental protection, agriculture and forest, etc.

Description

The micro-wave digestion jar

The utility model is a kind of of the airtight molten sample equipment of microwave.The airtight molten sample of microwave is a new molten sample technology that rises in the analytical chemistry.It is compared with traditional sampler-dissolving method in conjunction with high-pressure digestion and microwave Fast Heating two aspect performances, and it is fast to have a Specimen eliminating, and reagent consumes few, and blank value is low, avoids volatilization loss, reclaims and waits outstanding advantage fully.Can also clear up the sample that many methods commonly used are difficult to clear up, be fit to the pre-treatment of all kinds of analytical samples, especially be fit to trace analysis and ultrapure analysis.Thereby in the analytical test of petrochemical complex, material science, commodity inspection, biology, medical science, Food Science, geology, metallurgy, obtain popularizing rapidly.

The airtight molten sample technology of microwave is to use the micro-wave digestion jar, realizes under microwave heating.The kind and the form of micro-wave digestion jar are varied both at home and abroad at present.Along with the appearance of high performance plastics, the load performance of micro-wave digestion jar, usable range also constantly improves and develops.Though in safe handling, have various blast resistance constructions to be ensured, mostly cooperate controlled heating furnace to use.Because the present easy rupture of membranes that adopts and the explosion-proof mode (as patent 94224998.4,94239414.3) of elasticity gland, pressure when it leaks mostly is not a determined value, because blast resistance construction itself is different with the length of heated time, the height difference of heating temperature has sizable difference and be directed at leak pressure.When high even surpass the ability to bear of tank body, cause blast.So for the sake of security, adopt the mode of pressure measurement, infrared measurement of temperature or both and usefulness to be controlled to microwave oven, and have accurate electronic equipment to satisfy the control program of various complexity thereupon.But owing to can not monitor all heated counteracting tanks simultaneously, and microwave oven itself exists at present still the homogeneous heating problem that can not the garden completely solves.For the danger that prevents that indivedual counteracting tank blasts from causing, the microwave oven that has adds one deck explosion-protection equipment again.In sum, microwave heating is cleared up microwave heating system has been proposed higher requirement.The price of general this microwave heating system all compares expensive.Therefore, influenced this broad application greatly.

The purpose of this utility model is to a kind of structure of guaranteeing safety anti-explosive of micro-wave digestion jar design.This structure is utilized the principle of pressure cooker safety valve and is designed.Reach superpressure by relief hole, spool, pressure limiting cover and let out the purpose of carrying.Pressure was a determined value when this structure was leaked.It is only relevant with the aperture of the weight of pressure limiting cover and relief hole, and with length heat time heating time, heating temperature is just irrelevant.By the weight of qualification pressure limiting cover and the aperture of definite relief hole, can get definite letting out and carry pressure.According to the load-bearing capacity and the necessary security coefficient of counteracting tank, determine the weight of pressure limiting cover and the aperture of relief hole.As long as strict with molten control gauge model operation: each one of tank body cleans up; Molten sample solvent load is suitable; Relief hole is looked into not have and is stopped up.Just can guarantee not have the danger of blast.Therefore, this utility model can fit on the micro-wave oven of opertaing device and heat, and also can heat on general micro-wave oven.This just helps the application of microwave digestion technology widely.

The characteristics of the utility model counteracting tank:

1, urceolus adopts the structure of lid up and down of internal thread, and barrel is double-deck.Skin is the very high fiberglass of intensity.Therefore, make whole urceolus that very high load-bearing capacity be arranged.

2, between the bowl cover of interior cup and cup, adopt the structural design of self-tightening sealing.

3, in interior bowl cover central authorities one aperture is arranged, by the spool shutoff that has pointed cone, press a pressure limiting cover on the spool on the hole, play a part superpressure and let out and carry.

4, in interior cup bottom collet is arranged, it cooperates with the top platform is convenient to take out interior cup.

Below in conjunction with description of drawings detailed structure of the present utility model and characteristics.

The micro-wave digestion jar is made of pressure limiting cover 1, spool 3, last cover 2, following cover 10, urceolus 6, enhancement Layer 7, interior bowl cover 4, interior cup 5, bottom flake 8, base 9.External pre-platform 11.

On interior glass 5 bottom flakes 8 that place in the urceolus 6, bottom flake 8 falls within down on the cover 10, and following cover 10 is by being fixed between the two with the base 9 that is threaded of urceolus 6.Interior bowl cover 4 links to each other with the rim of a cup conical surface of interior cup 5 by the conical surface Gai Kou of bottom, and is screwed down by means of the screw thread with urceolus 6 by last cover 2, and on the cup 5, bowl cover 4 and interior cup 5 connecting places had leakproofness preferably in making in interior bowl cover 4 was pressed on.Spool 3 places in the center relief hole of interior bowl cover 4 pointed cone of bottom, and presses thereon by the deadweight of pressure limiting cover 1 by last cover 2 center pits.

The whole counteracting tank that installs molten sample and digestion solution is in advance put into micro-wave oven, molten sample and digestion solution are heated under airtight condition clear up, along with temperature constantly raises and clears up accelerating of reflection, the pressure mediums in the interior cup 5 are also increasing.The wall of interior under pressure bowl cover 4 and interior cup 5 outwards expands and is directed at relative disengaging upper and lower displacement.But because of being subjected to urceolus 6 and last cover 2 and the restriction of cover 10 down, under certain pressure, this expansion and displacement are very little.The conical surface of junction is the self-tightening sealing structure between interior bowl cover 4 and the interior cup 5, thereby is subjected to add all the better closely after the compression swelling.When the pressure of medium in the interior cup 5 greatly to the time above the pressure of pressure limiting cover 1 qualification, just wash spool 3 open and release a part of pressure.And maintain in the fixed pressure that is situated between in advance in the cup 5 in still making.This Jie's level pressure power not only can satisfy requirement of clearing up but also the maximum pressure that can bear far below whole counteracting tank.Therefore in whole digestion process, be safe.This promptly is a great advantage of the present utility model.Under normal circumstances, set the heating intensity and the heat time heating time of rational micro-wave oven, just can accomplish and not only clear up fully but also the superpressure purpose of leaking not according to the characteristics of different molten samples and digestion solution.After finishing heating by predefined requirement, can put on proximity gloves counteracting tank is taken out from micro-wave oven.When treating that counteracting tank is cooled near room temperature, take off pressure limiting cover 1 and screw off cover 2 counteracting tank is placed on the top platform 11, jack-up bottom flake 8 ejects the first half of interior cup 5 and interior bowl cover 4 outside 6 mouthfuls of the urceolus, easily interior cup 5 is taken out from tube.According to the program of analytical approach, the sample transfer after will clearing up is sent to detection to moving in the liquid bottle.

Above-mentioned pressure limiting cover 1 can be made by materials such as glass, pottery, tygon.Interior bowl cover 4, interior cup 5, spool 3 are made by the fluoroplastic of stable chemical performance.Last cover 2, following cover 10, urceolus 6 can be made by the plastics of good, the heat-resisting height of intensity, easy transmission microwave.Enhancement Layer 7 is made by the fiberglass of intensity height, easily saturating microwave.Bottom flake 8, base 10 can be made by plastics such as polypropylene.

This counteracting tank can bear the interior cup pressure of 7MPa at normal temperatures and keep it airtight.The actual pot life is decided to be 3MPa pressure, satisfies general molten sample requirement fully.

Claims

1, a kind of microwave heating counteracting tank that is used for the sample for chemical analysis pre-treatment has pressure limiting cover, interior cup and double-deck urceolus, it is characterized in that:

(1), outside the urceolus 6 one deck fiberglass enhancement Layer is arranged.

(2), upward cover 2, following cover 10 press driving fit by means of the screw thread of 6 of urceolus with interior bowl cover 4 and interior cup 5.

(3), the junction of 5 in interior bowl cover 4 and interior cup is a self-tightening sealing formula structure.

(4), the following awl point of spool 3 is pressed in the bowl cover 4 center relief holes, make its sealing by pressure limiting cover 1.

2, micro-wave digestion jar according to claim 1 is characterized in that fixing a base 9 between urceolus 6 and the following cover 10.

3, micro-wave digestion jar according to claim 1, bottom flake 8 is arranged at cup 5 bottoms in it is characterized in that so that top platform 11 with it together with interior cup jack-up.

4, micro-wave digestion jar according to claim 1 is characterized in that:

(1), goes up cover 2, following cover 10 and urceolus 6 and (strengthen polypropylene, poly-maple, polyetheretherketone, polyphenylene sulfide etc. by plastics heat-resisting, high-strength, easily saturating microwave.) make.

(2), spool 3, interior cup 5, interior bowl cover 4 are by thermal stability and all good fluoroplastic (polytetrafluoroethylene, the PFA etc. of chemical stability.) make.

(3), top platform 11 is made by metal or plastics.