阅读说明：本技术 一种可自动切换滤光片的检测器滤光装置 (Detector filtering device capable of automatically switching optical filter ) 是由 申爽 吴隆 齐洁 于 2021-01-29 设计创作，主要内容包括：本发明公开了一种可自动切换滤光片的检测器滤光装置,属于农药残留检测技术领域,一种可自动切换滤光片的检测器滤光装置,包括滤光壳体,滤光壳体为空心结构,滤光壳体的上下两侧均开设有对应设置的圆形通孔,且下侧的圆形通孔内安装有透镜,滤光壳体的内部中心处设有竖直设置的调节转轴,滤光壳体的上下两侧中心处均固定有轴承,滤光壳体的外壁上固定有对称设置的第一滤光片结构和第二滤光片结构,可以实现对两个滤光片进行快速切换,并在切换过程中进行表面自清理,保证滤光效果,含有两种滤光片,一个检测器中可以根据需要切换,降低成本同时增加了单台检测器的检测项目,克服了不漏光的难点,提高了检测器的利用率。(The invention discloses a detector filtering device capable of automatically switching optical filters, belonging to the technical field of pesticide residue detection, and comprising a filtering shell, wherein the filtering shell is of a hollow structure, the upper side and the lower side of the filtering shell are respectively provided with a circular through hole which is correspondingly arranged, a lens is arranged in the circular through hole at the lower side, the center of the inner part of the filtering shell is provided with a vertically arranged adjusting rotating shaft, the centers of the upper side and the lower side of the filtering shell are respectively provided with a bearing, the outer wall of the filtering shell is fixedly provided with a first optical filter structure and a second optical filter structure which are symmetrically arranged, the rapid switching of the two optical filters can be realized, the surface self-cleaning is carried out in the switching process, the filtering effect is ensured, the two optical filters are contained, one detector can be switched according to the needs, the cost is reduced, and the detection items of a single detector are, the difficulty of no light leakage is overcome, and the utilization rate of the detector is improved.)

1. The utility model provides a but detector filter of automatic switch-over light filter, includes filtering casing (1), filtering casing (1) is hollow structure, circular through-hole (2) that correspond the setting are all seted up to the upper and lower both sides of filtering casing (1), and the downside install lens, its characterized in that in circular through-hole (2): the utility model discloses a filter, including light filtering casing (1), the inside center department of light filtering casing (1) is equipped with regulation pivot (3) of vertical setting, the upper and lower both sides center department of light filtering casing (1) all is fixed with bearing (4), be fixed with first light filter structure (6) and second light filter structure (7) that the symmetry set up on the outer wall of light filtering casing (1), and second light filter structure (7) and circular through-hole (2) corresponding setting, set up on the both sides lateral wall of light filtering casing (1) with first light filter structure (6) and second light filter structure (7) assorted spacing groove (5), and the tip joint of first light filter structure (6) and second light filter structure (7) is in spacing groove (5), adjust pivot (3) and bearing (4) and rotate and be connected, the installation cavity has been seted up to the upper surface inside of light filtering casing (1), and the installation cavity is inside to be equipped with to drive and adjusts pivot (3) and carry out specific angle pivoted light filter change mechanism (8) ) Two groups of optical filter wiping mechanisms (9) are further fixed on the outer wall of the optical filtering shell (1), and the two groups of optical filter wiping mechanisms (9) are arranged in a staggered mode with the first optical filter structures (6) and the second optical filter structures (7).

2. The filter device of claim 1, wherein: the optical filter replacing mechanism (8) comprises a circular cavity (801) arranged at the center of the upper side of the optical filter shell (1), a first rectangular cavity (802) and a second rectangular cavity (803) are respectively arranged on two sides of the circular cavity (801) in the optical filter shell (1), the first rectangular cavity (802) and the second rectangular cavity (803) are arranged in a staggered mode with a first optical filter structure (6) and a second optical filter structure (7), the first rectangular cavity (802) and the second rectangular cavity (803) are communicated with the circular cavity (801), compression springs (804) are fixed at the inner bottoms of the first rectangular cavity (802) and the second rectangular cavity (803), the compression springs (804) in the first rectangular cavity (802) are connected with a first direct current electromagnet (805), and the compression springs (804) in the second rectangular cavity (803) are connected with a second direct current electromagnet (806), the side walls of the first direct current electromagnet (805) and the second direct current electromagnet (806) are both connected with a sliding rod (809), the sliding rod (809) is connected with the filtering shell (1) in a sliding way, the directions of magnetic fields generated when the first direct current electromagnet (805) and the second direct current electromagnet (806) are electrified are opposite, the inside of the circular cavity (801) is provided with a bar magnet (807) which is concentric with the circular cavity, the bar magnet (807) is fixedly connected with the top end of the adjusting rotating shaft (3), the bar magnet (807) is arranged in a magnetic attraction way with the magnetic field generated by the circular cavity (801), both ends of the bar magnet (807) are hemispherical, the iron core end parts of the first rectangular cavity (802) and the second rectangular cavity (803) are respectively provided with an arc-shaped groove (808) matched with the end part of the bar magnet (807), and two ends of the bar magnet (807) are clamped in the arc-shaped grooves (808) at the two ends.

3. The filter device of claim 2, wherein: smooth coatings are smeared on the outer walls of the two ends of the bar magnet (807), and the end parts of the arc-shaped grooves (808) are in arc transition.

4. The filter device of claim 2, wherein: a plurality of second spherical grooves (810) which are uniformly distributed are formed in the end portion of the bar magnet (807), second balls (811) are embedded into the second spherical grooves (810), and the second balls (811) are abutted to the arc-shaped grooves (808).

5. The filter device of claim 1, wherein: the optical filter wiping mechanism (9) comprises an installation shell (901) fixed on the inner wall of the optical filter shell (1), a wiping liquid box (902) is fixed at the inner top of the installation shell (901), a water-absorbing sponge pad (903) is connected to the bottom end of the wiping liquid box (902), a plurality of water-absorbing fibers (904) are inserted into the wiping liquid box (902), the water-absorbing fibers (904) extend to the inner bottom of the wiping liquid box (902), the bottom end of the water-absorbing fibers (904) is connected with the water-absorbing sponge pad (903), the front end and the rear end of the interior of the installation shell (901) are respectively connected with an installation plate (905), a rotating shaft (906) is rotatably connected between the two installation plates (905), wiping cloth (908) is sleeved on the outer wall of the rotating shaft (906), and the length of the wiping cloth (908) is matched with the sizes of the first optical filter structure (6) and the second optical filter structure (7), the bottom end of the wiping cloth (908) is lower than the upper surfaces of the first optical filter structure (6) and the second optical filter structure (7), and the bottom end of the water-absorbing sponge pad (903) is attached to the wiping cloth (908).

6. The filter device of claim 5, wherein: the wiping solution tank (902) is filled with wiping solution, and the wiping solution is a mixed solution of ethanol solution and ether solution according to the volume ratio of 3: 1.

7. The filter device of claim 5, wherein: an annular inflatable air bag (907) is fixed on the outer wall of the rotating shaft (906), and the wiping cloth (908) is fixed on the outer wall of the annular inflatable air bag (907).

8. The filter device of claim 1, wherein: the second optical filter structure (7) comprises a fixed circular ring (701) and a heat conduction ring (702) which are concentrically arranged, an optical filter (703) is fixed inside the heat conduction ring (702), a plurality of heat conduction cylinders (704) which are distributed annularly are fixed on the inner ring wall of the fixed circular ring (701), an extension spring (705) is fixed inside the heat conduction cylinder (704), the end of the extension spring (705) is connected with a thermal shrinkage stretching rod (706), the other end of the thermal shrinkage stretching rod (706) is fixed on the outer wall of the heat conduction ring (702), and the thermal shrinkage stretching rods (706) are annularly arranged.

9. The filter device of claim 1, wherein: a plurality of first spherical grooves (501) are formed in the side wall, in contact with the first optical filter structure (6), of the limiting groove (5), first balls (502) are embedded into the first spherical grooves (501), and the first balls (502) are attached to the outer surfaces of the first optical filter structure (6) and the second optical filter structure (7).

Technical Field

The invention relates to the technical field of pesticide detection, in particular to a detector light filtering device capable of automatically switching light filters.

Background

The development of agricultural industrialization makes the production of agricultural products depend on exogenous substances such as pesticides, antibiotics and hormones. The amount of agricultural chemicals in agricultural products in China is high, and the unreasonable use of the substances can lead to the overproof pesticide residues in the agricultural products, influence the edible safety of consumers, and cause the consumers to have diseases and abnormal development in serious cases, even directly cause poisoning and death. The over-standard pesticide residue also affects the trade of agricultural products, countries in the world pay high attention to the problem of pesticide residue, and increasingly strict limit standards are stipulated for pesticide residue in various agricultural and sideline products, so that the export of agricultural products in China faces a severe challenge.

The rapid detection methods for pesticide residues are various in types, and are mainly divided into two main types based on the principle: biochemical assays and chromatographic assays. The enzyme inhibition rate method in the biochemical determination method is listed as a national recommended standard method due to the characteristics of rapidness, sensitivity, simple and convenient operation, low cost and the like, becomes one of mainstream technologies for carrying out on-site rapid qualitative preliminary screening detection on organophosphorus and carbamate pesticide residues in fruits and vegetables, and is increasingly widely applied. Chromatography is one of the common methods for analyzing pesticide residue, and it is a method that the separation is achieved according to the difference of the distribution coefficient of the analyte between the stationary phase and the mobile phase, and the concentration of the analyte is converted into an electrical signal (voltage, current, etc.) that can be easily measured, and then sent to a recorder for recording. Mainly comprises thin layer chromatography, gas chromatography and high performance liquid chromatography.

The FPD detector, i.e. flame photometric detector, is a detector with high selectivity and high sensitivity to phosphorus and sulfur-containing compounds. When the sample is burnt in a hydrogen-rich flame, the phosphorus-containing organic compound mainly emits light with the wavelength of 526nm in the form of HPO fragments, and the sulfur-containing compound emits characteristic light with the wavelength of 394nm in the form of S2 molecules. The photomultiplier converts the optical signal into an electrical signal, and the electrical signal is amplified and recorded by a micro-current. The sensitivity of such detectors can reach tens to hundreds of coulombs per gram, and the detection limit of flame photometric detectors can reach 10-12g/S (for P) or 10-11g/S (for S). Meanwhile, the ratio of the response value of the detector to organophosphorus and organosulfur to the response value of hydrocarbon can reach 104, so that the interference of a large number of solvent peaks and hydrocarbons can be eliminated, the trace phosphorus and sulfur analysis is very facilitated, and the detector is a main tool for detecting organophosphorus pesticides and sulfur-containing pollutants.

The FPD detector that present gas chromatograph used comes to measure phosphorus and sulphur containing residual agricultural chemicals and content, and the sample burns in hydrogen flame, then passes through different light filters respectively, makes the different spectra of phosphorus flame or sulphur containing flame pass through, passes through the back through focus, reflects the intensity of light on photomultiplier, but the optical filter that current FPD detector used generally all has a light filter, when detecting the time need changing the testing item, need change whole optical filter, has not only influenced detection efficiency, and the whole change of optical filter is also comparatively difficult.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the invention aims to provide a light filtering device of a detector capable of automatically switching light filters, which can realize the quick switching of the two light filters, can carry out surface self-cleaning in the switching process, ensures the light filtering effect, comprises the two light filters, can be switched in one detector according to the requirements, reduces the cost, increases the detection items of a single detector, overcomes the difficulty of light leakage, and improves the utilization rate of the detector.

2. Technical scheme

In order to solve the above problems, the present invention adopts the following technical solutions.

A detector filtering device capable of automatically switching optical filters comprises a filtering shell, wherein the filtering shell is of a hollow structure, circular through holes are formed in the upper side and the lower side of the filtering shell, lenses are installed in the circular through holes in the lower side of the filtering shell, a vertically arranged adjusting rotating shaft is arranged at the center of the interior of the filtering shell, bearings are fixed at the centers of the upper side and the lower side of the filtering shell, a first optical filter structure and a second optical filter structure which are symmetrically arranged are fixed on the outer wall of the filtering shell, the second optical filter structure is arranged corresponding to the circular through holes, limiting grooves matched with the first optical filter structure and the second optical filter structure are formed in the side walls of the two sides of the filtering shell, the end portions of the first optical filter structure and the second optical filter structure are clamped in the limiting grooves, and the adjusting rotating shaft is rotatably connected with the bearings, the filter comprises a filter shell and is characterized in that an installation cavity is formed in the inner portion of the upper surface of the filter shell, a mechanism for driving an adjusting rotating shaft to change a filter in a specific angle rotation mode is arranged in the installation cavity, two sets of filter wiping mechanisms are further fixed on the outer wall of the filter shell and are arranged in a staggered mode with a first filter structure and a second filter structure. When using filter equipment, utilize the second light filter structure to filter hydrogen flame, when needs use first light filter structure to filter, it rotates to change mechanism control regulation pivot through the light filter, it can to drive first light filter structure and second light filter structure and carry out the position interchange, first light filter structure and second light filter structure joint are at the spacing inslot, can effectively promote the stability of first light filter structure and second light filter structure, avoid rocking, at the rotation in-process, the light filter wiping mechanism of setting wipes the surface of first light filter structure and second light filter structure, avoid the dust adhesion, guarantee the filtering effect. This scheme can realize carrying out the fast switch-over to two light filters to carrying out the surface at the switching in-process and self-cleaning, guaranteeing the filtering effect, contain two kinds of light filters, can switch as required in the detector, reduce cost has increased the detection project of single detector simultaneously, has overcome the difficult point that does not leak light, has improved the utilization ratio of detector.

Furthermore, the optical filter replacing mechanism comprises a circular cavity arranged at the center of the upper side of the optical filter shell, a first rectangular cavity and a second rectangular cavity are respectively arranged on two sides of the circular cavity in the optical filter shell, the first rectangular cavity and the second rectangular cavity are arranged in a staggered manner with a first optical filter structure and a second optical filter structure, the first rectangular cavity and the second rectangular cavity are communicated with the circular cavity, compression springs are fixed at the inner bottoms of the first rectangular cavity and the second rectangular cavity, the compression springs in the first rectangular cavity are connected with a first direct current electromagnet, the compression springs in the second rectangular cavity are connected with a second direct current electromagnet, the side walls of the first direct current electromagnet and the second direct current electromagnet are connected with sliding rods, the sliding rods are connected with the optical filter shell in a sliding manner, and the directions of magnetic fields generated when the first direct current electromagnet and the second direct current electromagnet are electrified are opposite, the inside of circular cavity is equipped with the bar magnet rather than concentric setting, and bar magnet and the top fixed connection who adjusts the pivot, bar magnet and the produced magnetic field looks magnetism of circular cavity inhale the setting, bar magnet's both ends are the hemisphere, the iron core tip of first rectangle cavity and second rectangle cavity all seted up with bar magnet tip assorted arc recess, bar magnet's both ends joint is in the arc recess at both ends. When the adjusting device is in an initial state, the first direct current electromagnet and the second direct current electromagnet are both in a power-off state, the bar magnets are clamped inside the arc-shaped grooves at two ends, the bar magnets are magnetically attracted and connected with iron cores of the first direct current electromagnet and the second direct current electromagnet, the adjusting rotating shaft is ensured not to rotate, a user can utilize the second optical filter structure to filter light, when the first optical filter structure and the second optical filter structure need to be switched, the first direct current electromagnet is controlled to be electrified to generate a magnetic field, a repelling effect is generated on the bar magnets, the first direct current electromagnet and the second direct current electromagnet move towards two ends due to the fact that the adjusting rotating shaft is not moved, the adjusting rotating shaft continues to be rotated by the repelling force until the rotating angle is larger than 180 degrees, the magnetic field generated by the bar magnets and the first direct current electromagnet is attracted, the adjusting rotating shaft is adsorbed into the arc-shaped grooves, the position exchange of the first optical filter structure and the second optical filter structure is realized, when the switching is needed to be continued, the second direct current electromagnet is controlled to be electrified, at the moment, the bar magnet finishes 180-degree rotation, and a magnetic field generated when the second direct current electromagnet is electrified is repelled with the bar magnet, so that under the action of a repulsive force, the bar magnet continues to rotate for 180 degrees, the position exchange of the first optical filter structure and the second optical filter structure is realized, the exchange of the positions of the first optical filter structure and the second optical filter structure can be realized only by controlling the first direct current electromagnet and the second direct current electromagnet to be switched on and off in a staggered mode, and the quick use switching of the first optical filter structure and the second optical filter structure is realized.

Further, smooth coating has all been paintd on bar magnet's the both ends outer wall, the tip of arc recess adopts the circular arc transition, can effectively reduce the frictional force between bar magnet and the arc recess, avoids the bar magnet joint to lead to the fact the card phenomenon of dying in the arc recess can not rotate.

Furthermore, the end part of the bar magnet is provided with a plurality of second spherical grooves which are uniformly distributed, second balls are embedded in the second spherical grooves and are abutted against the arc-shaped grooves, so that the friction force between the bar magnet and the arc-shaped grooves can be further reduced, the bar magnet can smoothly rotate,

further, the optical filter wiping mechanism comprises a mounting shell fixed on the inner wall of the optical filter shell, a wiping liquid box is fixed at the inner top of the mounting shell, the bottom end of the wiping liquid box is connected with a water-absorbing sponge mat, a plurality of water-absorbing fibers are inserted in the wiping liquid box, the water absorption fiber extends to the bottom in the wiping solution tank, the bottom end of the water absorption fiber is connected with the water absorption sponge mat, the front end and the rear end of the inside of the mounting shell are both connected with mounting plates, a rotating shaft is rotatably connected between the two mounting plates, the outer wall of the rotating shaft is sleeved with wiping cloth, the length of the wiping cloth is matched with the sizes of the first optical filter structure and the second optical filter structure, the bottom end of the wiping cloth is smaller than the upper surfaces of the first optical filter structure and the second optical filter structure, and the bottom end of the water-absorbing sponge cushion is attached to the wiping cloth. Because the foam-rubber cushion and the foam-rubber cushion that absorbs water all have better water absorption effect, can continuously adsorb the inside alcohol of wiping solution case, adsorb alcohol to the foam-rubber cushion that absorbs water, and the surface wetting of cloth will be wiped, at the rotation in-process of first light filter structure and second light filter structure, because highly being less than first light filter structure of wiping cloth, the height of second light filter structure upper surface, consequently wipe cloth and can laminate mutually with the surface of first light filter structure and second light filter structure, thereby clean the surface of first light filter structure and second light filter structure, the surface adhesion of avoiding first light filter structure and second light filter structure has the dust, guarantee the filtering effect of first light filter structure and second light filter structure.

Furthermore, wiping liquid is filled in the wiping liquid box, the wiping liquid is a mixed solution of an ethanol solution and an ether solution according to the volume ratio of 3:1, and the wiping effect on the surfaces of the first optical filter structure and the second optical filter structure can be effectively improved.

Further, be fixed with annular gas cell on the outer wall of axis of rotation, wipe cloth and fix on annular gas cell's outer wall, be equipped with adjustable annular gas cell, can adjust the outer lane diameter of wiping cloth through the expansion degree of adjusting annular gas cell to the surface of first light filter structure, second light filter structure is hugged closely to messenger that can be convenient to wipe cloth, guarantees the effect of wiping first light filter structure, second light filter structure surface.

Furthermore, the second optical filter structure comprises a fixed ring and a heat conduction ring which are concentrically arranged, an optical filter is fixed inside the heat conduction ring, a plurality of heat conduction cylinders distributed in an annular shape are fixed on the inner ring wall of the fixed ring, an extension spring is fixed inside the heat conduction cylinders, the end of the extension spring is connected with a thermal shrinkage stretching rod, the other end of the thermal shrinkage stretching rod is fixed on the outer wall of the heat conduction ring, and the thermal shrinkage stretching rods are annularly arranged. Many evenly distributed's extension spring and the tensile pole of pyrocondensation make the heat-conducting ring be in balanced state, utilize the light filter to filter, when flame is not in circular through-hole inside center department, the structural one side temperature that is close to flame of second light filter is higher, and the shrinkage length of the tensile pole of pyrocondensation with one side is big more, consequently can be with the heat-conducting ring toward same one side pulling, makes the light filter carry out the position according to the flame temperature and finely tunes to guarantee the filtering effect of light filter.

Furthermore, a plurality of first spherical grooves are formed in the side wall, in contact with the first optical filter structure, of the limiting groove, first balls are embedded into the first spherical grooves, and the first balls are attached to the outer surfaces of the first optical filter structure and the second optical filter structure. The first spherical groove can better limit the first optical filter structure and the second optical filter structure, so that the first optical filter structure and the second optical filter structure are prevented from offsetting, and the detection precision is ensured.

3. Advantageous effects

Compared with the prior art, the invention has the advantages that:

(1) this scheme can realize carrying out the fast switch-over to two light filters to carrying out the surface at the switching in-process and self-cleaning, guaranteeing the filtering effect, contain two kinds of light filters, can switch as required in the detector, reduce cost has increased the detection project of single detector simultaneously, has overcome the difficult point that does not leak light, has improved the utilization ratio of detector.

(2) When the adjusting device is in an initial state, the first direct current electromagnet and the second direct current electromagnet are both in a power-off state, the bar magnets are clamped inside the arc-shaped grooves at two ends, the bar magnets are magnetically attracted and connected with iron cores of the first direct current electromagnet and the second direct current electromagnet, the adjusting rotating shaft is ensured not to rotate, a user can utilize the second optical filter structure to filter light, when the first optical filter structure and the second optical filter structure need to be switched, the first direct current electromagnet is controlled to be electrified to generate a magnetic field, a repelling effect is generated on the bar magnets, the first direct current electromagnet and the second direct current electromagnet move towards two ends due to the fact that the adjusting rotating shaft is not moved, the adjusting rotating shaft continues to be rotated by the repelling force until the rotating angle is larger than 180 degrees, the magnetic field generated by the bar magnets and the first direct current electromagnet is attracted, the adjusting rotating shaft is adsorbed into the arc-shaped grooves, the position exchange of the first optical filter structure and the second optical filter structure is realized, when the switching is needed to be continued, the second direct current electromagnet is controlled to be electrified, at the moment, the bar magnet finishes 180-degree rotation, and a magnetic field generated when the second direct current electromagnet is electrified is repelled with the bar magnet, so that under the action of a repulsive force, the bar magnet continues to rotate for 180 degrees, the position exchange of the first optical filter structure and the second optical filter structure is realized, the exchange of the positions of the first optical filter structure and the second optical filter structure can be realized only by controlling the first direct current electromagnet and the second direct current electromagnet to be switched on and off in a staggered mode, and the quick use switching of the first optical filter structure and the second optical filter structure is realized.

(3) Smooth coating has all been paintd on bar magnet's the both ends outer wall, and the tip of arc recess adopts the circular arc transition, can effectively reduce the frictional force between bar magnet and the arc recess, avoids the bar magnet joint to lead to the fact the card phenomenon of dying in the arc recess can not rotate.

(4) A plurality of evenly distributed's the spherical groove of second is seted up to bar magnet's tip, and the inside embedding of the spherical groove of second has the second ball, and second ball and arc recess looks butt, can further reduce the frictional force between bar magnet and the arc recess, and the bar magnet of being convenient for smoothly rotates.

(5) Because the foam-rubber cushion and the foam-rubber cushion that absorbs water all have better water absorption effect, can continuously adsorb the inside alcohol of wiping solution case, adsorb alcohol to the foam-rubber cushion that absorbs water, and the surface wetting of cloth will be wiped, at the rotation in-process of first light filter structure and second light filter structure, because highly being less than first light filter structure of wiping cloth, the height of second light filter structure upper surface, consequently wipe cloth and can laminate mutually with the surface of first light filter structure and second light filter structure, thereby clean the surface of first light filter structure and second light filter structure, the surface adhesion of avoiding first light filter structure and second light filter structure has the dust, guarantee the filtering effect of first light filter structure and second light filter structure.

(6) The wiping solution is a mixed solution of an ethanol solution and an ether solution in a volume ratio of 3:1, and the wiping effect on the surfaces of the first optical filter structure and the second optical filter structure can be effectively improved.

(7) The adjustable annular inflatable air bag is arranged, the diameter of the outer ring of the wiping cloth can be adjusted through adjusting the expansion degree of the annular inflatable air bag, so that the wiping cloth can be conveniently attached to the surfaces of the first optical filter structure and the second optical filter structure, and the wiping effect on the surfaces of the first optical filter structure and the second optical filter structure is guaranteed.

(8) Many evenly distributed's extension spring and the tensile pole of pyrocondensation make the heat-conducting ring be in balanced state, utilize the light filter to filter, when flame is not in circular through-hole inside center department, the structural one side temperature that is close to flame of second light filter is higher, and the shrinkage length of the tensile pole of pyrocondensation with one side is big more, consequently can be with the heat-conducting ring toward same one side pulling, makes the light filter carry out the position according to the flame temperature and finely tunes to guarantee the filtering effect of light filter.

(9) The first spherical groove can better limit the first optical filter structure and the second optical filter structure, so that the first optical filter structure and the second optical filter structure are prevented from offsetting, and the detection precision is ensured.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is a top view of the internal structure of the filter housing of the present invention;

FIG. 4 is a top view of the filter changing mechanism of the present invention;

FIG. 5 is an enlarged view of the structure at B in FIG. 4;

FIG. 6 is an enlarged view of the structure at C in FIG. 5;

FIG. 7 is a schematic structural diagram of a filter wiping mechanism according to the present invention;

FIG. 8 is a schematic structural diagram of a second filter structure according to the present invention;

fig. 9 is an enlarged schematic view of the structure at D in fig. 8.

The reference numbers in the figures illustrate:

1 filter shell, 2 round through holes, 3 adjusting rotating shafts, 4 bearings, 5 limiting grooves, 501 first spherical grooves, 502 first balls, 6 first filter structures, 7 second filter structures, 701 fixed circular rings, 702 heat conducting rings, 703 filters, 704 heat conducting cylinders, 705 extension springs, 706 heat shrinkage extension rods, 8 filter replacing mechanisms, 801 round cavities, 802 first rectangular cavities, 803 second rectangular cavities, 804 compression springs, 805 first direct current electromagnets, 806 second direct current electromagnets, 807 bar magnets, 808 arc-shaped grooves, 809 sliding rods, 810 second spherical grooves, 811 second balls, 9 filter wiping mechanisms, 901 mounting shells, 902 wiping liquid tanks, 903 water absorbing sponge pads, 904 water absorbing fibers, 905 mounting plates, 906 rotating shafts, 907 annular inflatable airbags and 908 wiping cloth.

Detailed Description

The drawings in the embodiments of the invention will be combined; the technical scheme in the embodiment of the invention is clearly and completely described; obviously; the described embodiments are only some of the embodiments of the invention; but not all embodiments, are based on the embodiments of the invention; all other embodiments obtained by a person skilled in the art without making any inventive step; all fall within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

referring to fig. 1 and 3, a light filtering device of a detector capable of automatically switching light filters comprises a light filtering casing 1, wherein the light filtering casing 1 is a hollow structure, circular through holes 2 are correspondingly formed in the upper and lower sides of the light filtering casing 1, a lens is installed in the circular through hole 2, a vertically arranged adjusting rotating shaft 3 is arranged in the center of the interior of the light filtering casing 1, bearings 4 are fixed in the centers of the upper and lower sides of the light filtering casing 1, a first light filter structure 6 and a second light filter structure 7 which are symmetrically arranged are fixed on the outer wall of the light filtering casing 1, the second light filter structure 7 is arranged corresponding to the circular through hole 2, limiting grooves 5 matched with the first light filter structure 6 and the second light filter structure 7 are formed in the side walls of the two sides of the light filtering casing 1, and the end portions of the first light filter structure 6 and the second light filter structure 7 are clamped in the limiting grooves 5, adjusting shaft 3 rotates with bearing 4 to be connected, and the installation cavity has been seted up to the upper surface inside of light filtering casing 1, and the installation cavity is inside to be equipped with to drive adjusting shaft 3 and carry out specific angle pivoted light filter and change mechanism 8, still is fixed with two sets of light filters on the outer wall of light filtering casing 1 and cleans mechanism 9, and two sets of light filters clean mechanism 9 and first light filter structure 6, the crisscross setting of second light filter structure 7. When using filter equipment, utilize second light filter structure 7 to filter hydrogen flame, when needs use first light filter structure 6 to filter light, change 8 control adjustment pivot 3 rotations of mechanism through the light filter, it can to drive first light filter structure 6 and second light filter structure 7 and carry out the position interchange, first light filter structure 6 and second light filter structure 7 joint are in spacing groove 5, can effectively promote the stability of first light filter structure 6 and second light filter structure 7, avoid rocking, at the rotation in-process, the light filter wiping mechanism 9 that sets up wipes first light filter structure 6 and second light filter structure 7's surface, avoid the dust adhesion, guarantee the filtering effect. This scheme can realize carrying out the fast switch-over to two light filters to carrying out the surface at the switching in-process and self-cleaning, guaranteeing the filtering effect, contain two kinds of light filters, can switch as required in the detector, reduce cost has increased the detection project of single detector simultaneously, has overcome the difficult point that does not leak light, has improved the utilization ratio of detector.

Referring to fig. 1 and fig. 4-5, the filter replacing mechanism 8 includes a circular cavity 801 formed in the center of the upper side of the filter housing 1, a first rectangular cavity 802 and a second rectangular cavity 803 are respectively formed in the filter housing 1 at two sides of the circular cavity 801, the first rectangular cavity 802 and the second rectangular cavity 803 are alternately arranged with the first filter structure 6 and the second filter structure 7, the first rectangular cavity 802 and the second rectangular cavity 803 are both communicated with the circular cavity 801, compression springs 804 are fixed at the inner bottoms of the first rectangular cavity 802 and the second rectangular cavity 803, the compression spring 804 in the first rectangular cavity 802 is connected with a first dc electromagnet 805, the compression spring 804 in the second rectangular cavity 803 is connected with a second dc electromagnet 806, and sliding rods 809 are connected to the side walls of the first dc electromagnet 805 and the second dc electromagnet 806, and slide bar 809 and filtering casing 1 sliding connection, the magnetic field opposite direction that produces when first direct current magnet 805 and second direct current magnet 806 circular telegram, the inside of circular cavity 801 is equipped with rather than concentric bar magnet 807 that sets up, and bar magnet 807 and the top fixed connection who adjusts pivot 3, bar magnet 807 and the produced magnetic field looks magnetism of circular cavity 801 inhale the setting, the both ends of bar magnet 807 are the hemisphere, the iron core tip of first rectangle cavity 802 and second rectangle cavity 803 all seted up with bar magnet 807 tip assorted arc recess 808, the both ends joint of bar magnet 807 is in the arc recess 808 at both ends. In an initial state, the first dc electromagnet 805 and the second dc electromagnet 806 are both in a power-off state, at this time, the bar magnet 807 is clamped inside the arc-shaped grooves 808 at both ends, and the bar magnet 807 is magnetically connected with the iron cores of the first dc electromagnet 805 and the second dc electromagnet 806, so as to ensure that the adjusting rotating shaft 3 does not rotate, a user can use the second optical filter structure 7 to filter light, when the first optical filter structure 6 and the second optical filter structure 7 need to be switched, the first dc electromagnet 805 is controlled to be energized to generate a magnetic field to generate a repulsive force to the bar magnet 807, because the position of the adjusting rotating shaft 3 is not moved, the first dc electromagnet 805 and the second dc electromagnet 806 move towards both ends, the adjusting rotating shaft 3 continues to be rotated by the repulsive force until the rotation angle is greater than 90180 °, at this time, the bar magnet 807 and the magnetic field generated by the first dc electromagnet 805 are magnetically attracted, and the adjusting rotating shaft 3 is attracted into, the 180-degree rotation of the adjusting rotating shaft 3 is completed, the position interchange of the first optical filter structure 6 and the second optical filter structure 7 is realized, when the switching needs to be continued, the second direct current electromagnet 806 is controlled to be electrified, at the moment, because the bar magnet 807 completes the 180-degree rotation, the magnetic field generated when the second direct current electromagnet 806 is electrified is repelled with the bar magnet 807, under the action of the repulsion force, the bar magnet 807 continues to rotate for 180 degrees, the position interchange of the first optical filter structure 6 and the second optical filter structure 7 is realized, the position interchange of the first optical filter structure 6 and the second optical filter structure 7 can be realized only by controlling the first direct current magnet 805 and the second direct current electromagnet 806 to be alternately switched on and off, and the quick use switching of the first optical filter structure 6 and the second optical filter structure 7 is realized.

Referring to fig. 4-5, smooth coatings are coated on the outer walls of the two ends of the bar magnet 807, and the end portions of the arc-shaped grooves 808 are in arc transition, so that the friction between the bar magnet 807 and the arc-shaped grooves 808 can be effectively reduced, and the phenomenon of jamming caused by the fact that the bar magnet 807 is clamped in the arc-shaped grooves 808 and cannot rotate is avoided.

Referring to fig. 4-6, the end of the bar magnet 807 is formed with a plurality of second spherical grooves 810 uniformly distributed, the second spherical grooves 810 are embedded with second balls 811, and the second balls 811 abut against the arc-shaped grooves 808, so as to further reduce the friction between the bar magnet 807 and the arc-shaped grooves 808, thereby facilitating the smooth rotation of the bar magnet 807,

referring to fig. 3 and 7, the optical filter wiping mechanism 9 includes a mounting casing 901 fixed on the inner wall of the optical filter housing 1, a wiping liquid tank 902 fixed on the inner top of the mounting casing 901, a water-absorbing sponge pad 903 connected to the bottom end of the wiping liquid tank 902, a plurality of water-absorbing fibers 904 inserted into the wiping liquid tank 902, and absorbent fiber 904 extends to the bottom in wiping liquid box 902, the bottom of absorbent fiber 904 is connected with absorbent sponge pad 903, both ends all are connected with mounting panel 905 around the inside of installation shell 901, it is connected with axis of rotation 906 to rotate between two mounting panels 905, cup joint on the outer wall of axis of rotation 906 and wipe cloth 908, the length of wipe cloth 908 and first light filter structure 6, the size phase-match of second light filter structure 7, the bottom height of wipe cloth 908 is less than the height of first light filter structure 6, the height of second light filter structure 7 upper surface, the bottom of absorbent sponge pad 903 is laminated with wipe cloth 908 mutually. Because the water absorption sponge pad 903 and the water absorption sponge pad 903 both have a good water absorption effect, the water absorption sponge pad 903 and the water absorption sponge pad 903 can continuously absorb alcohol inside the wiping liquid box 902, the alcohol is absorbed into the water absorption sponge pad 903, and the surface of the wiping cloth 908 is wetted, in the rotating process of the first optical filter structure 6 and the second optical filter structure 7, because the height of the wiping cloth 908 is smaller than the height of the upper surfaces of the first optical filter structure 6 and the second optical filter structure 7, the wiping cloth 908 can be attached to the surfaces of the first optical filter structure 6 and the second optical filter structure 7, so that the surfaces of the first optical filter structure 6 and the second optical filter structure 7 are wiped, dust is prevented from adhering to the surfaces of the first optical filter structure 6 and the second optical filter structure 7, and the filtering effect of the first optical filter structure 6 and the second optical filter structure 7 is ensured.

Referring to fig. 7, the inside of the wiping solution tank 902 is filled with wiping solution, the wiping solution is a mixed solution of ethanol solution and ether solution in a volume ratio of 3:1, and the wiping effect on the surfaces of the first optical filter structure 6 and the second optical filter structure 7 can be effectively improved.

An annular inflatable air bag 907 is fixed on the outer wall of the rotating shaft 906, the wiping cloth 908 is fixed on the outer wall of the annular inflatable air bag 907, an adjustable annular inflatable air bag 907 is arranged, the diameter of the outer ring of the wiping cloth 908 can be adjusted by adjusting the expansion degree of the annular inflatable air bag 907, and therefore the wiping cloth 908 can be conveniently attached to the surfaces of the first optical filter structure 6 and the second optical filter structure 7, and the wiping effect on the surfaces of the first optical filter structure 6 and the second optical filter structure 7 is guaranteed.

Referring to fig. 3 and 8-9, the second optical filter structure 7 includes a fixed ring 701 and a heat-conducting ring 702 that are concentrically arranged, an optical filter 703 is fixed inside the heat-conducting ring 702, a plurality of heat-conducting cylinders 704 that are annularly distributed are fixed on an inner ring wall of the fixed ring 701, an extension spring 705 is fixed inside the heat-conducting cylinder 704, an end of the extension spring 705 is connected with a heat-shrinkable stretching rod 706, another end of the heat-shrinkable stretching rod 706 is fixed on an outer wall of the heat-conducting ring 702, the heat-shrinkable stretching rods 706 are annularly arranged, the first optical filter structure 6 and the second optical filter structure 7 have the same structure, but the internal optical filter 703 is replaced with other different optical filters that need. The heat conducting ring 702 is in a balanced state by the aid of the uniformly distributed stretching springs 705 and the thermal shrinkage stretching rods 706, the optical filter 703 is used for filtering light, when flame is not in the center of the circular through hole 2, the temperature of one side, close to the flame, of the second optical filter structure 7 is higher, the shrinkage length of the thermal shrinkage stretching rods 706 on the same side is larger, and therefore the heat conducting ring 702 is pulled towards the same side, the position of the optical filter 703 is finely adjusted according to the flame temperature, and the filtering effect of the optical filter 703 is guaranteed.

Referring to fig. 1-2, a plurality of first spherical grooves 501 are formed on the side wall of the limiting groove 5 contacting the first optical filter structure 6, a first ball 502 is embedded in the first spherical groove 501, and the first ball 502 is attached to the outer surfaces of the first optical filter structure 6 and the second optical filter structure 7. The first spherical groove 501 can better limit the first optical filter structure 6 and the second optical filter structure 7, so that the position of the first optical filter structure 6 and the position of the second optical filter structure 7 are prevented from shifting, and the detection precision is ensured.

The above; but are merely preferred embodiments of the invention; the scope of the invention is not limited thereto; any person skilled in the art is within the technical scope of the present disclosure; the technical scheme and the improved concept of the invention are equally replaced or changed; are intended to be covered by the scope of the present invention.