CN2408938Y

CN2408938Y - Supercritical CO2 extracting pot

Info

Publication number: CN2408938Y
Application number: CN 00203460
Authority: CN
Inventors: 陈葆华
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-02-18
Filing date: 2000-02-18
Publication date: 2000-12-06
Anticipated expiration: 2010-02-18

Abstract

The utility model relates to an extraction kettle used for supercritical carbon dioxide extraction technique, particularly a head sealing mechanism in the extraction kettle. The head sealing mechanism comprises a kettle, a head with a thermometric pipe sleeve, a screw plug and a sealing ring. The utility model is characterized in that a pressure ring arranged between the head and the screw plug comprises an annular surface which can be attached to the screw plug and a cylindric surface fixed on the periphery of the annular surface, and the bottom end of the cylindric surface can be attached to the sealing ring which is a group of annular sheets overlapped up by different materials. The utility model solves the problems of the existing extraction kettle, such as time and force consumption for opening, the short service life of the sealing ring, etc.

Description

The supercritical carbon dioxide extracting still

The utility model relates to a kind of end socket sealing mechanism of the extraction kettle that is used for supercritical CO 2 extraction technology, especially extraction kettle.

Existing supercritical carbon dioxide extracting still can see from Fig. 3 that it contains end socket 2, screw plug 3 and the sealing ring 4 of kettle 1, band thermometric pipe box 21.Its sealing ring is an O type rubber ring, and be installed on the perisporium of end socket 2, therefore it can not compress sealing ring 4, realize the sealing of extraction kettle by screwing screw plug 3, and can only utilize carbon dioxide under supercriticality to the strong solubility of rubber, realize the sealing of extraction kettle with the swelling distortion of O type rubber ring.The shortcoming of existing extraction kettle is: 1) because of the distortion of O type rubber ring behind swelling is very big, so after opening end socket, this O type circle is just scrapped, so it improves the cost of extraction; 2) resistance between rubber behind the swelling and end socket, the kettle is very big, so it is very difficult to open end socket, usually need four people and everyone to take boosting-rod, and take one hour and just can open, not only require great effort but also bothersome, and will account for half of extraction process required time of the time that is spent, so make extraction efficiency low.

The purpose of this utility model is to overcome the shortcoming that exists in the above-mentioned prior art, a kind of supercritical carbon dioxide extracting still is provided, so that it have that the breakdown end socket is saved trouble and laborsaving, sealing ring is reusable, and good sealing effect, reliable operation, simple in structure, manufacturing and characteristics such as easy for installation.

The utility model supercritical carbon dioxide extracting still includes end socket, screw plug and the sealing ring of kettle, band thermometric pipe box, be characterized in: 1) pressure ring is housed between end socket and screw plug, and this pressure ring comprises the garden cylinder that can fit with sealing ring in its bottom on garden anchor ring that an energy fits with screw plug and the periphery that is fixed in the garden anchor ring; The whole malleations of the axial force that produces so that screw screw plug had not only made sealing reliable but also reduce the power of the required usefulness of folding end socket on sealing ring; 2) sealing ring is one group of garden ring segment that is formed by stacking by different materials; Especially should contain the garden ring segment of making by the material that not corroded by supercritical carbon dioxide.

The utility model supercritical carbon dioxide extracting still also can be installed one at the top of screw plug with the compacting ring of end socket with the compaction degree of the fine-tuning sealing ring that is threaded.Can make on the end socket and carry by screwing this circle,, perhaps unscrew compacting ring, end socket is descended and unclamp sealing ring, thereby play the fine setting end socket with the tight degree of the sealing between the kettle further to compress sealing ring.

The utility model supercritical carbon dioxide extracting still also can be installed a plane bearing between compacting ring is with screw plug.Can reduce to open and close the required power of end socket by this bearing, make rapid operation.

The utility model has the advantages that: after 1) between end socket and screw plug, pressure ring being installed, because of this pressure ring the axial force on the screw plug all can be transmitted and malleation on sealing ring, so the power of the reliable operation of the utility model extraction kettle and the required usefulness of folding is less than small size; Bring up to 55 MPas as operating pressure by 32 MPas of existing extraction kettle, its work is still very reliable and stable and very light and handy at the extraction breakdown end socket that finishes; 2) sealing ring is one group of garden ring segment being made by different materials; For example be formed by stacking with the two-layer bakelite sheet of the garden annular that carbon dioxide corrodes and the sheet rubber that one deck is clipped in two bakelite sheets of not being subjected to, it had both kept the good seal performance of rubber, can reuse in extraction process again, therefore the cost of extraction also reduces because of the prolongation in service life of sealing ring; 3) simple in structure, the manufacturing and easy for installation of the utility model supercritical carbon dioxide extracting still.

To the utility model be further described below by embodiment and by accompanying drawing below.Have in the accompanying drawing:

Fig. 1 is the main cutaway view of the utility model supercritical carbon dioxide extracting still;

Fig. 2 is the A-A cutaway view among Fig. 1;

Fig. 3 is the main cutaway view of existing supercritical carbon dioxide extracting still.

Can see the structure of the utility model supercritical carbon dioxide extracting still from Fig. 1 and Fig. 2, it contains end socket 2, screw plug 3 and the sealing ring 4 of kettle 1, band temperature tube 21, and the pressure ring of installing between end socket and screw plug 5.Screw plug 3 kinks on end socket, and with kettle to be threaded; Pressure ring and sealing ring also kink on end socket, wherein pressure ring is between screw plug and sealing ring, this pressure ring comprises the garden cylinder that can fit with sealing ring in its bottom on garden anchor ring that an energy fits with screw plug and the periphery that is fixed in the garden anchor ring, the axial force that produces so that screw screw plug can by it the garden anchor ring and the whole malleations of garden cylinder on sealing ring, make sealing reliable; Simultaneously smaller because of the cylinder bottom, garden of pressure ring again with the contact-making surface of sealing ring, so the breakdown end socket is more laborsaving.Sealing ring 4 is made up of three layers of garden ring segment, and its upper and lower two-layer bakelite sheet that is, and middle one deck is a sheet rubber so that the flexibility of the existing rubber of sealing ring can prevent the erosion of supercritical carbon dioxide again, thereby has prolonged service life of sealing ring.

The utility model supercritical carbon dioxide extracting still also can be installed one with the compacting ring 6 of end socket 2 to be threaded at the top of screw plug 3.As rotate this compacting ring, and get final product and carry end socket, make sealing ring further compacted; The compacting ring that perhaps reverses, then end socket descends, sealing ring is released; It plays the effect of compaction degree of fine setting sealing ring, makes the work of extraction kettle more reliable, breakdown is lighter.

The utility model supercritical carbon dioxide extracting still also can be installed a plane bearing 7 between compacting ring 6 is with screw plug 3; By this bearing breakdown end socket more like a cork.

Claims

1, a kind of supercritical carbon dioxide extracting still, it includes end socket (2), screw plug (3) and the sealing ring (4) of kettle (1), band thermometric pipe box (21), it is characterized in that:

1) pressure ring (5) is housed between end socket and screw plug, this pressure ring comprises the garden cylinder that can fit with sealing ring in its bottom on garden anchor ring that an energy fits with screw plug and the periphery that is fixed in this garden anchor ring;

2) sealing ring (4) is one group of garden ring segment that is formed by stacking by different materials.

2, supercritical carbon dioxide extracting still as claimed in claim 1 is characterized in that: the compacting ring (6) of a same end socket (2) with the compaction degree of the fine-tuning sealing ring (4) that is threaded installed at the top of said screw plug (3).

3, as claim 1 and 2 described supercritical carbon dioxide extracting stills, it is characterized in that: said compacting ring is with a plane bearing (7) is installed between the screw plug.