CN2491829Y

CN2491829Y - Sample pool

Info

Publication number: CN2491829Y
Application number: CN 00242289
Authority: CN
Inventors: 徐文柄; 张之隽; 楼秀钦
Original assignee: Lanzhou Petroleum Proc & Chemi
Current assignee: Lanzhou Petroleum Proc & Chemi
Priority date: 2000-07-19
Filing date: 2000-07-19
Publication date: 2002-05-15
Anticipated expiration: 2010-07-19

Abstract

The utility model discloses a sample pool for testing the optical property of liquid on line, comprising a main body (1), a sealing cover (2), a lens (3), and a sealing ring (4). The sealing method employed by the utility model is that the elastic sealing ring (4) is extruded, deformed and filled in a side crevice between the main body (1) and the lens (3), the central flowing area of a flow passage (8) is reduced, an included angle is designed between a sample inlet (6) and a sample outlet (8), and the sample inlet (6) and the sample outlet (8) are replaced to meet the need of large lighting area, the above designs ensure that the dead space in the sample pool is avoided, the flowing of sample is not blocked, which ensure the timely and accurate of the testing result.

Description

Sample cell

The present invention relates to a kind of sample cell of on-line measurement optics of liquids character.

Sample cell is an indispensable device of measuring optics of liquids character.All-glass work is adopted in the laboratory more, can't be used for on-the-spot continuous coverage.The sample pool structure that uses is seen accompanying drawing 1 at present, and its feature is as follows: light path is vertical mutually with the sample flow direction, and it is straight line that sample is imported and exported runner.Sealing between sample cell main body and the camera lens has adopted O-ring seal crimp to fill the mode of positive gap.In addition, patent specification ZL 95 2 16453.1 discloses another kind of sample cell, and its structure is seen accompanying drawing 2, is characterized as: light path is vertical mutually with the sample flow direction, sample flow channel is to process a groove on the part that is called as the light path sheet, with the THICKNESS CONTROL light path of light path sheet.Sealing between sample cell main body and the camera lens has adopted O-ring seal crimp to fill the mode of positive gap.

The problem of design mainly shows at present: for the sample cell shown in the accompanying drawing 1, because the restriction of sealing means forms flow dead near camera lens.When increasing light path, main body optical path direction size increases, and the flow direction size constancy, flow dead further increases.For the sample cell shown in the accompanying drawing 2, the design of this sample cell is only applicable to the measurement of little light path, when increasing light path, because the inner space increases, can form flow dead equally in sample cell.Because the existence of flow dead, sample is detained, and upgrades by displacement, causes measurement result to lag behind poor accuracy.For the sample of high-temp high-viscosity, be detained problems such as also causing coking easily for a long time.

Purpose of the present invention just provides a kind of sample cell that is used for on-line measurement optics of liquids character that can not produce flow dead, improves the accuracy of measuring.

The design proposal in fresh sample pond is: the sealing between sample cell main body 1 and the camera lens 3 adopts elastic seal ring 4 crimps to fill the mode in slit, side.Dwindle sample flow channel 8 middle part circulation areas, runner 8 designs that connect sample inlet 6 and sample export 7 have angle.When increasing light path, change the relative position of sample inlet 6 and sample export 7, the increase of main body light path 5 direction sizes is changed into the increase of flow direction size.

Sample cell makes camera lens 3 can be close to sample flow channel 8 by improving the encapsulating method of camera lens 3, has eliminated near the flow dead the camera lens 3.In addition, sample flow channel 8 middle part constriction in flow area and angle is arranged, the out-of-date flow velocity of sample flow increases and also produces eddy current, can effectively clean and adhere to sample.When light path increases, only increased the length of sample flow channel 8, be equivalent to increase by one section sample pipe, can not produce flow dead, solved the sample retention problems that present sample cell exists.

The present invention is further illustrated below in conjunction with drawings and Examples.

Accompanying drawing 1 is existing sample pool structure synoptic diagram, and accompanying drawing 2 is existing sample pool structure synoptic diagram, and accompanying drawing 3 is fresh sample pond (little light path) structural representation, and accompanying drawing 4 is fresh sample pond (big light path) structural representation.

Present a kind of sample pool structure is seen accompanying drawing 1.Each parts is: 1 sample cell main body, 2 gland bonnets, 3 camera lenses, 4 O-ring seals, 5 light paths, 6 sample inlets, 7 sample exports, 8 runners.

This sample cell forms flow dead because encapsulating method causes between sample flow channel 8 and the camera lens 3 and has the turning.When the light path increase, when promptly distance increased between the camera lens 3, flow dead further increased.

Patent specification ZL 95 2 16453.1 disclosed sample pool structures are seen accompanying drawing 2.Each parts is: 1 sample cell main body, 2 gland bonnets, 3 camera lenses, 4 O-ring seals, 5 light paths, 6 sample inlets, 7 sample exports, 8 runners, 9 light path sheets.

We are as can be seen from accompanying drawing 1, the sample cell that accompanying drawing 2 is showed is identical with the sample cell encapsulating method of accompanying drawing 1, formed new sample flow channel 8 by between two camera lenses 3, adding light path sheet 9, the position that cooperates sample inlet 6 and sample export 7, when little light path, the inner no flow dead of sample cell.But when light path increased, the sample flow space increased, and begins to form flow dead.

New sample pool structure is seen accompanying

drawing

3,4, and each parts is: 1 sample cell main body, 2 gland bonnets, 3 camera lenses, 4 O-ring seals, 5 light paths, 6 sample inlets, 7 sample exports, 8 runners.

Fig. 3,4 has showed new sample cell, has improved the encapsulating method of camera lens.The sample flow channel middle part is because the effect of camera lens makes constriction in flow area, and sample turnover runner has 120 ° of angles.When increasing light path, change the sample flow direction by changing the relative position that sample imports and exports, change the increase of main body optical path direction size the increase of flow direction size into, be equivalent to increase by one section sample pipe.

According to this scheme, the sample cell that the sample cell that we have processed 6mm and 40mm light path is used as the ZZSY-1 type on-line intelligence determination of colority instrument of my unit development uses, and measures the normal decompressing unit four line lubricating oil colors that reduce pressure.The four line lubricating oil that reduce pressure are that viscosity is big, need the oil product of high temperature companion heat, in nearly 1 year use, do not find the situation of the mobile hysteresis coking of oil product, and good seal does not have leakage, and testing result does not have hysteresis, and is highly sensitive, the accuracy of measurement is improved, provides reliable assurance in time instructing to produce.

Claims

1. sample cell that is used for on-line measurement optics of liquids character, be made up of sample cell main body (1), gland bonnet (2), camera lens (3), O-ring seal (4), it is characterized in that: the sealing between sample cell main body (1) and the camera lens (3) has adopted elastic seal ring (4) crimp to fill the mode in slit, side; Runner (8) middle part constriction in flow area; The runner that connects sample inlet (6) and sample export (7) is angle.