CN2459074Y - High pressure dissolving pot for sample - Google Patents

Abstract

The utility model discloses a high pressure dissolving pot for a sample, which is provided with a metal pot body and a pot cover which form threaded connection; the metal pot body is combined into a whole with a polytetrafluoroethylene inner liner through adhesive; the flanging opening position of the polytetrafluoroethylene inner liner is provided with a polytetrafluoroethylene sealing cover plate; an inverted spacing cup sleeve is locked between the metal pot body and the pot cover; a piston and a compression spring are arranged in the spacing cup sleeve; the end surface of the piston is tightly pressed on the polytetrafluoroethylene sealing cover plate. The dissolving pot can effectively protect the polytetrafluoroethylene inner liner from fracture and leakage, can effectively prevent the occurrence of the pot body explosion accident, and has the advantage of safe working.

Description

Sample high pressure dissolving tank

The utility model relates to the container of digestion process sample, refers to a kind of sample high pressure dissolving tank particularly.

Before trace element in the sample or trace element detected, sample need be put into special container and heat and clear up processing.At present, this type of container that is used for the splendid attire sample adopts the totally enclosed type dissolving tank more.This dissolving tank generally has interior outer double-layer structure, and skin is a metal shell, and internal layer is polytetrafluoroethylliner liner and cover plate, can be placed on heat temperature raising in the electric heating warming case.Because the linear expansion coefficient of polytetrafluoroethylliner liner is much higher than metal shell, and both only are nested relationship, be not unified into an integral body, thereby when temperature constantly raise, polytetrafluoroethylliner liner can be softened dilatational strain inevitably; Again because the rebound resilience of polytetrafluoroethylliner liner is relatively poor, when temperature constantly descends, the polytetrafluoroethylliner liner contraction of catching a cold, but can't resilience reset, this will inevitably cause the surface of contact bad sealing between inner bag and the cover plate, thereby causes the generation of dissolving tank leakage accident.In order to address the above problem, people attempt compound layer of metal grid in polytetrafluoroethylliner liner, though this has alleviated two kinds of inconsistent problems of line of material expansion coefficient, but when cooling off particularly water quenching dissolving tank, form negative pressure in jar easily, teflon is stripped off with wire netting separate, finally cause the inner bag deformation fracture and scrap.In addition, this dissolving tank also has a fatal weakness, does not promptly have reliable safety anti-explosive device, and the temperature rise during owing to use in the tank body inner bag is difficult to accurate control, careless slightlyly just the high pressure explosion accident may take place, user's personal safety can not get effective guarantee.

The purpose of this utility model will provide a kind of polytetrafluoroethylliner liner that can prevent effectively to break and leak exactly, and safe and reliable sample high pressure dissolving tank.

For realizing this purpose, the sample high pressure dissolving tank that the utility model is designed, have metal can and cover that an external threading links, one polytetrafluoroethylliner liner is installed in the metal can, polytetrafluoroethylliner liner flange opening part is provided with a teflon seal cover plate, and polytetrafluoroethylliner liner is compound by bonding agent and metal can be an integral body.Locking has an inverted spacing glass holder between metal can and the cover, and a piston and compression spring are installed in the spacing glass holder, and piston end face is pressed on the teflon seal cover plate.

Advantage of the present utility model is: polytetrafluoroethylliner liner and metal can are combined into as a whole, both pin down when expanding and shrink mutually, under 250 ℃ of temperature, can not break away from yet, inner bag can not occur when in quench tank, producing negative pressure yet and strip off fracture phenomena.And, be fitted in firmly on the teflon seal cover plate by the leak-proof anti-explosive assembly that spacing glass holder, compression spring and piston constituted, when inner bag is caught a cold contraction, compression spring can reset rapidly, overcome the deficiency of polytetrafluoroethylliner liner rebound resilience difference effectively, remedied the gap that occurs when inner bag shrinks, guaranteed that dissolving tank can not leak.And when jar internal pressure surpassed the setting operating load of compression spring, a jar internal gas pressure can back down piston, released automatically from the slit of teflon seal cover plate and polytetrafluoroethylliner liner opening hole flanging, thereby had prevented the generation of explosion accident effectively.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail:

Fig. 1 is a kind of assembly structure synoptic diagram of sample high pressure dissolving tank.

Fig. 2 is the assembly structure synoptic diagram of another kind of sample high pressure dissolving tank.

Sample high pressure dissolving tank as depicted in figs. 1 and 2, its major part is identical, and just the structure of both metal covers and spacing glass holder and connection are had any different slightly.This dissolving tank has the metal can 1 of a band base and the metal cover 9 that top has circular hole, and metal can 1 and metal cover 9 adopt thread connection.With the firmly compound polytetrafluoroethylliner liner 2 that is connected with a band flange opening of bonding agent, the flange opening part of polytetrafluoroethylliner liner 2 is equipped with a teflon seal cover plate 3 at metal can 1 inwall.Compressing locking by screw thread between metal can 1 and metal cover 9 has an inverted spacing glass holder 6, and the piston 7 of a belt carcass axle is installed in the spacing glass holder 6, and compression spring 8 is sleeved on the mandrel of piston 7.The end face of piston 7 is to be used for compressing teflon seal cover plate 3, makes itself and polytetrafluoroethylliner liner 2 keep excellent sealings.In order further to strengthen the sealing effectiveness under this preset pressure, between the end face of piston 7 and teflon seal cover plate 3, also be provided with a silicon rubber pad 4, to make full use of the excellent resilient properties of silicon rubber pad 4, make the sealing between teflon seal cover plate 3 and the polytetrafluoroethylliner liner 2 can not produce leakage because of the out-of-flatness of end face.Also be equipped with one at the opening part of spacing glass holder 6 and only enclose 5 by screw thread, so that the piston 7, compression spring 8, silicon rubber pad 4 and the teflon seal cover plate 3 that are installed in the spacing glass holder 6 can therefrom not deviate from, convenient for assembly and actual use operation.

During leak-proof anti-explosive assembled of the present utility model, earlier compression spring 8 is sleeved on the mandrel of piston 7, piston 7 is installed in the spacing glass holder 6 then, pack into successively simultaneously silicon rubber pad 4 and teflon seal cover plate 3, withstand teflon seal cover plate 3 with external force such as lifting jack again, above-mentioned each parts are contracted in spacing glass holder 6, screw at the opening part of spacing glass holder 6 and only enclose 5 and get final product.During use, earlier sample and acids solvent are put into the metal can 1 that is lined with polytetrafluoroethylliner liner 2, then the above-mentioned leak-proof anti-explosive assembly integral body that has assembled is placed on the metal can 1, the teflon seal cover plate 3 and the opening hole flanging of polytetrafluoroethylliner liner 2 are fit together, pushing down spacing glass holder 6 from the top down with external force again fits the locating ring platform of itself and metal can 1, this moment, compression spring 8 was in compressive state, and tightening metal cover 9 can seal sample and acids solvent within it.When this dissolving tank is put into pot arch and is heated, along with the rising of temperature, polytetrafluoroethylliner liner 2 has certain expansion, but is subjected to pining down of the metal can 1 that is bonded as one with it, can the not exert an influence deformation of sealing effectiveness, opposite sealing effectiveness can be more and more desirable.When temperature descends, polytetrafluoroethylliner liner 2 contraction of catching a cold, because its rebound resilience is relatively poor, may the space appear at its sealing contact surface place, this moment, compression spring 8 began to release energy, and by piston 7, silicon rubber pad 4 gives the teflon seal cover plate 3 pressurizations, thereby can remedy the space that sealing contact surface may occur, reach and prevent the purpose of leaking.And when the pressure in the dissolving tank surpasses the nominal operation load of compression spring 8, high pressure gas cognition in jar is upwards backed down piston 7, gases at high pressure just can release from the space between polytetrafluoroethylliner liner 2 and the teflon seal cover plate 3, reach explosion-proof purpose.Release back piston 7 can automatically reset under the effect of compression spring 8, and corrosive gas can not leaked again.

Claims (3)

1, a kind of sample high pressure dissolving tank, comprise metal can and cover that screw thread links, polytetrafluoroethylliner liner is installed in the metal can, polytetrafluoroethylliner liner flange opening part is provided with the teflon seal cover plate, it is characterized in that: polytetrafluoroethylliner liner is compound by bonding agent and metal can be an integral body, locking has an inverted spacing glass holder between metal can and the cover, one piston and compression spring are installed in the spacing glass holder, and piston end face is pressed on the teflon seal cover plate.

2, sample high pressure dissolving tank according to claim 1 is characterized in that: also be provided with a silicon rubber pad between said piston end surface and the teflon seal cover plate.

3, sample high pressure dissolving tank according to claim 1 and 2 is characterized in that: said spacing glass holder opening part is provided with one and ends circle.