CN205229008U - A optics sample cell that is used for liquid infusibility particle detector of photoresistance method - Google Patents

Abstract

The utility model discloses an optics sample cell that is used for liquid infusibility particle detector of photoresistance method, the problem of the technique of multilayer corrosion resistant plate screw thread concatenation and the pressure -bearing value when being difficult to reach on -line measuring with the mode that close adhesive layer goes on sealing among the prior art is solved, its technical scheme main points adopt a weld forming structure, utilize the welded form to make an organic whole the inspection piece in the optics sample cell, and whole inlaying adorns to the connecting block in once more that the welding forms the optics sample cell that is used for granule on -line measuring device, the optics sample cell that possesses the inspection piece of such setting, the highest bearing capacity can reach the 400kg effect, satisfy on -line measuring's demand completely.

Description

For the optical sample pond of the liquid particulate determination instrument of light blockage method

Technical field

The utility model relates to a kind of optical sample pond, more particularly, it relate to a kind of be applied to insoluble particle technology and droplet measurement device in optical sample pond.

Background technology

Along with science and technology and being showing improvement or progress day by day and high speed development of modern industry, to the degree of purity of the actuating medium applied in many industries or product and accordingly examination and controlling technology propose more and more higher requirement.Wherein, the demand of the industry such as microelectronics, medicine, oil exploitation, high speed machine lubricating oil, hydraulic pressure (pneumatic) transmission is particularly outstanding.In the insoluble particle checkout equipment of liquid, common several detecting instruments have optical particulate calculating instrument, Ku Erte calculating instrument and nucleus of condensation calculating instrument, wherein, the fastest with the detection speed of optical particulate calculating instrument, disturb little, reliable operation degree is high and automaticity is high, thus application is commercially also extensive.

Optical particulate counting technology is divided into light scattering method and light blockage method two kinds, the insoluble particle in liquid is utilized to complete the counting of particle and the calculating of particle diameter for the scattering of incident light and resistance photosensitiveness respectively, wherein apply the optical particulate calculating instrument of light blockage method owing to not needing the problem of the acquisition system considering focusing and scattered light, therefore structure is comparatively simple, and application surface is also wide in light scattering method.Light blockage method is measured in the device of insoluble liquid particles, its kernel component is mounted in the proof mass of instrument internal, proof mass is a block with slit be made up of stainless steel material, when liquid flows to testing instruments inside, under suitable sealing and drainage means, liquid to be detected flows into the slit on proof mass, testing instruments are also provided with laser instrument, beat on slit after laser beam processes after filtering, laser pickoff is for receiving the laser of laser generator transmission, once there be insoluble particle to pass through in slit, laser pickoff to light be weakened once, and by this changing value by obtaining voltage negative pulses after photoelectric conversion, now basis, the number of negative pulse calculates the number of insoluble particle, by the projected area of the amplitude count particles of negative pulse, thus obtain the particle diameter of insoluble particle, thus judge the content of the insoluble particle shape impurity in liquid to be detected and particle size whether up to standard.

In above process, the precision of proof mass directly determines the accuracy of check data, because be counted at its slit through proof mass and detect during the detection of particle.Early stage proof mass exists with the form of sample cell, is that is mounted in another contiguous block by proof mass, utilizes contiguous block to be introduced in the slit on proof mass liquid to be detected, form independent sample cell sealing together.The structure of sample cell the earliest adopts semicircle piece of stainless steel and two pieces of glassy bonds, by in the middle of corrosion resistant plate, a slit is set, laser exposes in slit on glass optical window, and one piece, two blocks of glass is as incident optical window, another block as outgoing optical window, and this structure is as shown in figure accompanying drawing 1.Problems existing is that the width of slit is difficult to accurate control in such a configuration, because in this structure, the width of slit is adjusted by the spacing of two piece of stainless steel, due to the distance between two pieces of piece of stainless steel can be affected on piece of stainless steel during bonding two pieces of optical windows, therefore, the size of slit is very unstable.

Derivative on the basis of the above and what come is exactly structure shown in Fig. 2 of often adopting now, the form of what its structure adopted is exactly proof mass external contiguous block formation sample cell is mounted in testing instruments.Two pieces of seams plate (2) including two pieces of fixed heads (3) adopting 316 stainless steels to make in its proof mass and be folded between two pieces of fixed heads (3), adopt 316L stainless steel to make, the connecting thread hole (31) penetrating the corrosion resistant plate that three pieces compress mutually is utilized to fix the relative position of three layers of corrosion resistant plate, to ensure the reliability of annexation.Due to the slit (5) needing formation insoluble particle to pass through between seam plate (2), therefore, the point of fixity between every block seam plate (2) and upper and lower two fixed heads (3) must not be less than 3.But the form of connecting thread hole (31) only can ensure the relative position of three, the gap of seam crossing can produce the leakage of liquid under inlet hydraulic, this leakage can cause the decline of testing accuracy, thus, in proof mass structure in Fig. 2, be coated with fluid sealant between three layers of corrosion resistant plate, utilize sealant layer to seal the seam between corrosion resistant plate, prevent liquid from affecting accuracy of detection from joint leak.In addition, in order to be installed to by proof mass on insoluble particle checkout equipment, proof mass also be provided with two pieces of installing plates (1), utilize the hole on installing plate (1) to insert the liquid into and draw, form optical sample pond.

Structure in Fig. 2 employs for many years, has the rationality that it exists, but, also there is structural defect:

(1), in Fig. 2 in structure, sealant layer is for preventing leak of liquid necessary, but sealant layer the alignment error bringing 5 to 6 μm to integrally-built installation accuracy is set, this error later stage all can react in testing result.

(2) the insoluble particle checkout equipment continued to use in the past mainly contains two kinds: desk-top and hand-held, and its inlet hydraulic is the highest can not more than 80kg.But, the developing direction of liquid insoluble particle checkout equipment is that UHV (ultra-high voltage) detects, especially the proposition of on-line checkingi demand, insoluble particle under UHV (ultra-high voltage) in detecting liquid becomes main flow, therefore, it is even higher that inlet hydraulic in proof mass can rise to 200 to 300kg, for locating at least six connecting thread holes (31) of three layers of corrosion resistant plate on proof mass in Fig. 2, when bearing the fluid pressure of superelevation, the position be threaded can become the intensity the weakest point of whole proof mass, first structural damage also occurs in this position, thus, proof mass bears the restriction that pressure is mainly subject to connecting thread hole (31).

(3) because needs arrange connecting thread hole (31), thus the size of proof mass itself can not be too small, otherwise be difficult to the installation space needs meeting connecting thread hole (31), but the development trend of inspection machine is miniaturization at present, thus, in Fig. 2, physical dimension also can restrict it and further develops.

Utility model content

For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of optical sample pond for particle on-line checkingi and manufacture method thereof, makes it, meeting under photoresistance formula is the prerequisite that detects of example, and can bear at least 400kg force value.

For achieving the above object, the utility model provides following technical scheme: a kind of optical sample pond of the liquid particulate determination instrument for light blockage method, include upper and lower two pieces of fixed heads (3) and be folded in two pieces of seams plate (2) between fixed head (3), slit (5) is formed between described two seams plate (2), described fixed head (3) is embedded with optical flat (4), described fixed head (3) and seam plate (2) are welded and fixed formation proof mass, the surrounding of described proof mass also wraps the contiguous block (6) being provided with and inserting the liquid into or draw proof mass, described contiguous block (6) is provided with and the caulking groove of proof mass shape adaptation (63), when proof mass is embedded in caulking groove (63), the upper and lower end face of proof mass flushes with the upper and lower end face of contiguous block (6) and mutually seals fixing, described contiguous block (6) is provided with the flowing hole (62) inserting the liquid into or draw proof mass, described flowing hole (62) is communicated with slit (5).

First fixed head and seam plate are fixed, and with an overall form setting-in in caulking groove, then the structural strength of caulking groove itself reliably can be fixed proof mass, compared to the form be threaded connection in prior art, increases significantly in the bearing of pressure; Relative to the structure in background technology, eliminate the setting of sealant layer, installation accuracy improves a lot.

The utility model is set to further: described contiguous block (6) offers for fixing described optical sample pond to the mounting hole (61) on inspection machine.

By adopting technique scheme, because optical sample pond will be mounted to the detection just carrying out insoluble particle in particle online detection instrument, therefore, optical sample pond need correspondence to arrange mounting hole, because one-piece construction is different from of the prior art, the mounting hole in the optical sample pond in the utility model is arranged on contiguous block, offers with what prevent mounting hole the bearing capacity affecting proof mass.

The utility model is set to further: described contiguous block (6) offers the cable-through hole (64) for the connecting line by laser detector.

By adopting technique scheme, due to the utility model towards be the equipment that light blockage method measures insoluble particle in liquid, therefore, in the design in optical sample pond, need the reserved mouth connecting the circuit of Laser emission and receiving trap, be different from prior art, cable-through hole is arranged on contiguous block by the utility model, prevents perforate to the weakening of proof mass bearing capacity further.

The utility model is set to further: described fixed head (3) is provided with the groove (32) for being embedded optical flat (4).

By adopting technique scheme, because optical flat needs to keep certain flatness with the end face of fixed head, therefore, fixed head is offered one for installing the groove of optical flat, by gluing form, optical flat is mounted in groove again, can ensures that optical flat can not play in the cross grinding in later stage.

The utility model is set to further: the upper two ends corresponding to slit (5) of described fixed head (3) are provided with overcurrent otch (31), and the edge of the sectional dimension self-retaining plate (3) of described overcurrent otch (31) reduces gradually to slit (5) end.

By adopting technique scheme, because the size of slit sets according to testing accuracy, therefore, the particle size values that the maximum permission that the size of slit can not exceed expection is passed through, therefore, when liquid flows through slit, the position of slit can form the structure that is similar to slender holes, liquid resistance is very large, when the viscosity of the liquid checked is higher, be easy to be formed in the position of slit build the pressure, structure can be made like this to bear larger pressure, even destroy structure, at the two ends of slit, overcurrent otch is set, drainage is carried out to inflow and the liquid flowed out in slit, the liquid liquid reduced in the position of slit hinders, alleviate the fluid pressure that this part structure is born.

Accompanying drawing explanation

Fig. 1 is background technology accompanying drawing 1;

Fig. 2 is background technology accompanying drawing 2;

Fig. 3 is the erection sequence figure of three layers of corrosion resistant plate;

Fig. 4 is the schematic diagram being welded in cutting in inspection during manufacture block process;

The structural drawing of Fig. 5 proof mass;

Fig. 6 is the explosive view of proof mass;

Fig. 7 is the structural representation of contiguous block;

Fig. 8 is the structural drawing in the optical sample pond that the method in embodiment 1 obtains;

Fig. 9 is the structural representation of U-shaped piece;

Figure 10 is the structural representation of cover plate;

Figure 11 adopts U-shaped piece of welding, the installation graph of a relation becoming contiguous block with cover plate combination;

Figure 12 is the detonation configuration schematic diagram in optical sample pond.

Accompanying drawing marks: 1, installing plate; 2, plate is stitched; 3, fixed head; 4, optical flat; 5, slit; 6, contiguous block; 7, weld seam; 8, line of cut; 21, bevelled edge; 31, threaded hole; 32, overcurrent otch; 33, groove; 61, mounting hole; 62, flowing hole; 63, caulking groove; 64, cable-through hole; 65, U-shaped piece; 66, cover plate.

Embodiment

With reference to Fig. 3 to Figure 12, the utility model embodiment is described further.

For the manufacture method of the proof mass of insoluble particle detector in liquid, include following steps:

Step 1. first conventionally processes fixed head 3, seam plate 2 and optical flat 4, and is mounted on fixed head 3 by optical flat 4;

Step 2. is according to the order shown in Fig. 3, each block of two blocks of seam plates 2 is all fixed between a pair fixed head 3 by being no less than three threaded holes 31, should be noted that two problems herein, first, the position of threaded hole 31 should ensure under the prerequisite be connected and fixed as far as possible near outer peripheral position, secondly, the suitable slit 5 of size should be formed according to the accuracy of detection of detector between two blocks of seam plates 2;

Step 3. is after completing steps 2, three pieces of corrosion resistant plates are welded and fixed along its longer pair of parallel limit, replace with the intensity of weld seam and be threaded, form the weld seam 7 shown in Fig. 4, and along the line of cut 8 shown in Fig. 4, the part being threaded hole 31 on three pieces of corrosion resistant plates is removed;

Step 4. mends twice weld seam in the edge of former line of cut 8, makes three of remainder pieces of corrosion resistant plate surroundings all be fixed by weld seam and seal, forms proof mass as shown in Figure 5.

The structure of the proof mass completed by above-mentioned steps is as shown in the explosive view of Fig. 6, it comprises seam plate 2, fixed block 3, be fixed on the optical flat 4 on fixed block 3 and be arranged on the overcurrent otch 32 fixed block corresponding to slit 5 two ends, this proof mass compared with prior art, on the basis of functional part possessing complete proof mass, due to special manufacture method, its overall dimensions is much smaller than former proof mass, and the overall structure existence weakening its bearing capacity without any threaded hole and other of proof mass, therefore, through bulge test, the bearing capacity of the proof mass that the method in the utility model manufactures is at 400 more than ㎏, meet the requirement of UHV (ultra-high voltage) inspection machine completely, thus, can by the structure of the existing testing instruments of improvement of cooperation, proof mass is directly mounted in liquid insoluble particle detecting instrument, now corresponding, the installed position corresponding to proof mass in insoluble particle detecting instrument is provided with the syndeton wanting with proof mass to seal, to ensure that the liquid to be tested flowed in insoluble particle detecting instrument flows in the slit 5 on proof mass completely, above-mentioned the miniaturization being conducive to detecting instrument is like this set.

And, because proof mass surrounding all exists weld seam 7, the effect that weld seam 7 plays itself is not only fix three layers of corrosion resistant plate, and simultaneously can by joint seal, thus, proof mass structure in the utility model does not need fluid sealant, and its trueness error of installing can control between 2-3 μm, is more than doubled than the proof mass structure with fluid sealant.

It is pointed out that the job operation of weld seam 7 does not limit herein, can be any method being suitable for the welding of corrosion resistant plate, is preferably laser bonding.

Due in prior art, when proof mass is applied on testing instruments, the block 6 that also needs to be connected forms optical sample pond, so that be mounted in existing equipment, therefore, gives two kinds of structures of contiguous block 6 in the utility model.

The embodiment 1 of contiguous block 6

Process with 316 piece of stainless steel the piece of stainless steel that a physical dimension is suitable for liquid insoluble particle detecting instrument, and process a caulking groove 63 in the central authorities of this piece of stainless steel according to the physical dimension of proof mass, its structure as shown in Figure 7.By in proof mass setting-in to caulking groove 63 and by whole for the seam crossing at the two ends of contiguous block 6 welded seal, the optical sample pond like this in formation the present embodiment, its structure as shown in Figure 8.

The embodiment 2 of contiguous block 6

According to the split type processing contiguous block 6 of form of U-shaped piece 65 shown in Fig. 9 and Figure 10 and cover plate 66, wherein, the U-type groove of U-shaped piece of 65 inside is used for setting-in proof mass.When adopting the split type contiguous block 6 in the present embodiment, the process of setting-in proof mass includes:

Proof mass is mounted on U-shaped piece 65 by step 1., three seams is all welded;

Cover plate 66 covers on U-shaped piece 62 by step 2., and the surrounding of the seam along U-shaped piece 65 and cover plate 66 is welded.

The structure in the optical sample pond formed in embodiment 2 as shown in figure 11, its sealing is better than embodiment 1, its reason is, the vertical weld seam of twice 7 has been lacked relative to embodiment 2 when contiguous block 6 in embodiment 1 welds with proof mass, and this twice weld seam is when manufacturing accuracy is not enough, the leakage of liquid can be caused, affect testing accuracy, and due to the twice weld seam 7 of the inside of increase in embodiment 2, make liquid after entering optical sample pond 7, only there are slit 5 one fluid paths inside, and its good airproof performance, thus testing accuracy is high.

The structure in the optical sample pond of the liquid particulate determination instrument for light blockage method that above-mentioned manufacture method is formed as shown in figure 12, include two pieces of fixed heads 3 and be located in two blocks of seam plates 2 between two pieces of fixed heads 3, wherein, the end face that fixed head 3 abuts with seam plate 2 is embedded with optical flat 4, passing with the number and the particle diameter that detect insoluble particle for laser beam.According to the maximum particle diameter value of insoluble particle impurity in liquid to be detected, set the size of the slit 5 between two blocks of seam plates 2, can be also detected by slit 5 smoothly to make all impurity particles.Be different from the form that six pieces of corrosion resistant plates of the prior art are threaded, upper and lower two pieces of fixed heads 3 and two pieces stitched the proof mass that plate 2 is made of one formula herein.

Fixed block 3 is provided with the groove 33 for installing fixed optics glass plate 4 on the end face of seam plate 2, adding man-hour, first according to the shape of groove 33, optical flat 4 is cut into the shape with its adaptation, when setting-in optical flat 4, first on the edge of groove 33, appropriate glue is smeared, to be fixed in groove 33 by optical flat 4, keep the relative position relation of itself and fixed head 3.Ensure optical flat 4 and fixed head 3 flatness integrally, ensure that fixed head 3 fits tightly with seam plate 2 with this.It is to be noted, position corresponding with the two ends of slit 5 on fixed head 3 is provided with overcurrent otch 32, the benefit arranging overcurrent otch 32 is: because the size of slit 5 is general less, when the liquid with certain viscosity flows through slit 5, liquid resistance in slit 5 is similar to slender holes structure, therefore larger liquid resistance can be produced in it, the resistance of this liquid finally can cause in slit 5 not to be had liquid to flow through or produce building the pressure of inflow point under larger pressure, no matter any, all be unfavorable for the intensity of structure and the use in whole optical sample pond, the aperture of the overcurrent otch 32 offered is gradual changes, aperture on the end face of fixed block 3 is maximum, the aperture of the corresponding position, end of slit 5 is minimum, by the aperture of this gradual change, by liquid drain to the inflow point of slit 5, make it by slit 5, to detect particle diameter and to count numbers of particles.In using, overcurrent otch 32 on two pieces of fixed heads 3 of mounted on top docks the duct forming liquid and introduce, and stitch on plate 2 and be provided with bevelled edge 21, the end that two pieces, left and right bevelled edge 21 is docked at west wind 5 forms a leg-of-mutton liquid and introduces district, and this region corresponds to overcurrent otch 32 and arranges.Proof mass integral installation is in caulking groove 63 and be welded to each other fixing, forms optical sample pond.In order to insert the liquid into proof mass, contiguous block 6 is provided with a flowing hole 62, its setting position should be relative with slit 5, that is: flowing hole 62 and overcurrent otch 32 are coaxially arranged.The large end face of contiguous block 6 is provided with mounting hole 61 and cable-through hole 64, wherein, mounting hole 61 for overall optical sample pond is mounted to insoluble particle checkout equipment, the electric wire between the laser generator of cable-through hole 64 on connection device and receiver.It should be pointed out that the laser equipment being matched with different model herein, cable-through hole 64 can arrange two.

The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technical schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (5)

1. the optical sample pond for the liquid particulate determination instrument of light blockage method, include upper and lower two pieces of fixed heads (3) and be folded in two pieces of seams plate (2) between fixed head (3), slit (5) is formed between described two seams plate (2), described fixed head (3) is embedded with optical flat (4), described fixed head (3) and seam plate (2) are welded and fixed formation proof mass, it is characterized in that: the surrounding of described proof mass also wraps the contiguous block (6) being provided with and inserting the liquid into or draw proof mass, described contiguous block (6) is provided with and the caulking groove of proof mass shape adaptation (63), when proof mass is embedded in caulking groove (63), the upper and lower end face of proof mass flushes with the upper and lower end face of contiguous block (6) and mutually seals fixing, described contiguous block (6) is provided with the flowing hole (62) inserting the liquid into or draw proof mass, described flowing hole (62) is communicated with slit (5).

2. the optical sample pond of the liquid particulate determination instrument for light blockage method according to claim 1, is characterized in that: described contiguous block (6) offers for fixing described optical sample pond to the mounting hole (61) on inspection machine.

3. the optical sample pond of the liquid particulate determination instrument for light blockage method according to claim 1 and 2, is characterized in that: described contiguous block (6) offers the cable-through hole (64) for the connecting line by laser detector.

4. the optical sample pond of the liquid particulate determination instrument for light blockage method according to claim 1, is characterized in that: described fixed head (3) is provided with the groove (32) for being embedded optical flat (4).

5. the optical sample pond of the liquid particulate determination instrument for light blockage method according to claim 1, it is characterized in that: the upper two ends corresponding to slit (5) of described fixed head (3) are provided with overcurrent otch (31), and the edge of the sectional dimension self-retaining plate (3) of described overcurrent otch (31) reduces gradually to slit (5) end.