CN210442336U

CN210442336U - Titration apparatus for high school chemistry test

Info

Publication number: CN210442336U
Application number: CN201921084366.6U
Authority: CN
Inventors: 岳耀法
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-05-01
Anticipated expiration: 2029-07-11

Abstract

The utility model relates to a teaching test equipment field specifically is a titration outfit for high school's chemistry is experimental. The utility model discloses constitute by base, burette clamp, piston, regulating wheel and pipe, there are two sets ofly on the base the burette clamp the piston the regulating wheel with the pipe, the burette clamp is right the burette is fixed, through rotating the regulating wheel or hand wheel on the piston can make the piston move downwards, promotes reagent in the burette and removes to make reagent flow out from the pipe and accomplish titration work. The utility model discloses can carry out the order of a set of contrast titration test or two kinds of reagents titrate, titrate simultaneously, the mode is more nimble convenient, adopts the screw thread to promote the piston and moves, has higher accuracy nature.

Description

Titration apparatus for high school chemistry test

Technical Field

The utility model relates to a teaching test equipment field specifically is a titration outfit for high school's chemistry is experimental.

Background

At present, in the process of high school chemistry teaching, for promoting students 'hands-on ability, improve the teaching effect of school, can carry out some relevant experimental courses usually, let the classmates go to and operate with one's hands. In the experiment, often can use one or more titration outfits to drip into different types of quantitative reagent in a certain container and be used for verifying the influence of various reagents to certain liquid or drip into multiple reagent simultaneously and verify the influence to certain liquid, to the less high school student of actual operation experience, current titration outfit operates comparatively complicacy and can't accurately carry out quantitative titration, will cause the waste of experimental medicine and time intangibly. In order to solve the problem, the utility model provides a titration outfit for high school's chemistry is experimental.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high school is titration outfit for chemical test makes things convenient for students to carry out contrast test and carry out titration simultaneously and accurate quantitative titration at the in-process of carrying out titration experiment.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the utility model provides a titration outfit for high school's chemistry is experimental, includes base, burette clamp, piston, regulating wheel, pipe, its characterized in that:

the titration devices on the base in the device are two groups, the two groups of titration devices are arranged oppositely, in each group of titration devices, a supporting beam is arranged on the base, a positioning through hole is formed in the supporting beam and perpendicular to the ground direction, a screw rod on the piston penetrates through the positioning through hole, the screw rod on the piston is in threaded connection with the adjusting wheel, the adjusting wheel is positioned by the supporting beam to enable the adjusting wheel to rotate only, the adjusting wheel rotates to enable the piston to move up and down, a hand wheel is arranged above the screw rod in the piston, a handle is arranged on the hand wheel, a piston head is hinged to the lower portion of the screw rod in the piston, the piston head and the screw rod can rotate coaxially and relatively, and the lower end of the piston head is connected with a. The drip tube comprises a support beam, a drip tube seat is arranged on the support beam, the drip tube seat is hinged to the support beam and connected with a drip tube clamp, the drip tube seat and the drip tube clamp are matched to clamp a drip tube, the piston is inserted into the drip tube, the drip tube is made of transparent materials, scales are arranged on the side face of the drip tube, and the guide tube is connected below the drip tube.

Furthermore, thrust ball bearings are arranged between the upper side surface and the lower side surface of the adjusting wheel and the supporting beam, and the thrust ball bearings are arranged between the screw rod and the piston head in the piston.

Furthermore, the conduit is a plastic hose and can be twisted at any angle.

Further, the diameter of the rubber head is larger than that of the dropper.

Furthermore, the side surface of the adjusting wheel is provided with a convex edge to increase the friction in use.

The utility model has the advantages that:

the utility model discloses press from both sides, piston, regulating wheel, pipe etc. by base, burette and form, the burette presss from both sides and fixes the burette, through rotating regulating wheel or hand wheel, can make the piston move downwards, and reagent removes in the promotion burette to make reagent flow out from the pipe and accomplish titration work. The utility model has the advantages of, on same base, titration apparatus has two sets ofly, can accomplish a set of contrast titration simultaneously experimental, also can adopt two kinds of reagents to titrate or titrate simultaneously according to the order a chemical solution, titration experiment's mode is more nimble convenient, the scope of expanding use to a certain extent, adopt the screw thread to promote the piston to move simultaneously, combine the scale of burette side, thereby make students can accurate control from the volume of dripping liquid in the pipe, knob switch compares and has higher accuracy nature among the traditional titration apparatus. At the in-process that carries out titration test, the little small solution mass fraction of a bit changes and all probably causes the influence to the result of experiment, carries out titration test also so in high school's chemistry, and is not high to experimental overall requirement, but still has certain requirement to the precision, and the utility model discloses in, through slowly rotating regulating wheel or hand wheel, can realize the slow-speed removal of piston, reach fine motion control's purpose, combine the scale on the burette wall, can be comparatively accurate carry out quantitative control to the liquid of titrating, to the less high school student of actual operation experience, can be quick reach the required titration amount of experimental requirement, practiced thrift time and cost. The utility model discloses in, no matter rotate the regulating wheel alone or rotate the hand wheel alone, all can realize the lift of piston, depending on the difference of operation mode, the regulating wheel can realize the slow speed lift of piston, and it is higher to adjust the precision, and the hand wheel can realize the quick lift of piston, and speed is very fast, and the precision is slightly low, is suitable for different in service behavior respectively.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the base structure of the present invention.

Fig. 3 is a schematic view of the structure of the dropper clamp of the present invention.

Fig. 4 is a schematic view of the piston structure of the present invention.

Fig. 5 is a schematic view of the piston structure of the present invention.

Figure 6 is a schematic view of the adjusting wheel of the present invention

Wherein: the automatic dropper comprises a base 1, a dropper 2, a dropper clamp 3, a piston 4, an adjusting wheel 5, a conduit 6, a thrust ball bearing 7, a supporting beam 101, a positioning through hole 102, a dropper seat 103, scales 201, a hand-screwed bolt 301, a screw 401, a hand wheel 402, a handle 403, a piston head 404, a rubber head 405, a threaded hole 501 and a convex rib 502.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "back", "vertical", "lateral", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1-6, the utility model discloses a titration apparatus for high school chemistry test, which comprises a base 1, a dropper 2, a dropper clamp 3, a piston 4, an adjusting wheel 5 and a conduit 6, wherein, a support beam 101 is respectively arranged at the left and right sides of a square plate-shaped base 1, the support beam 101 is of an 'F' shape, the two support beams 101 are oppositely arranged, a positioning through hole 102 is arranged on two transverse beams on the support beam 101 in a direction perpendicular to the ground, a screw 401 on the piston 4 passes through the positioning through hole 102 without interference, the screw 401 on the screw 401 of the piston 4 is in threaded connection with the adjusting wheel 5, the adjusting wheel 5 is in a thin cylinder shape, a threaded hole 501 is arranged at the center of the adjusting wheel 5, the adjusting wheel 5 is positioned by the two transverse beams of the support beams 101 so that the adjusting wheel 5 can only rotate but not move up and down, the screw 401 of the piston 4 can move up and down by, three hand wheels 402 are rigidly connected above a screw 401 in the piston 4, meanwhile, a cylindrical handle 403 is arranged on the edge of the hand wheel 402, the screw 401 can rotate by rotating the hand wheel 402 or the handle 403, a cylindrical piston head 404 is hinged below the screw 401 in the piston 4, the piston head 404 and the screw 401 can rotate coaxially and relatively, the lower end of the piston head 404 is connected with a rubber head 405 in a buckling mode, and the rubber head 405 is made of rubber and has certain elasticity. There is the burette seat perpendicular to vertical roof beam direction on the vertical roof beam of a supporting beam 101, the shape of burette seat 103 is the semicircle the same with burette 2 diameter, it is connected with burette clamp 3 to articulate on supporting beam 101 on the same height, burette clamp 3 shape is the semicircle the same with burette 2 diameter, burette clamp 3 can rotate on supporting beam 101, burette clamp 3 can cooperate between burette seat 103 with burette 2 clamp, burette clamp 3 can press from both sides through hand screw bolt 301 between burette seat 103, at this moment, piston 4 can just in time insert in burette 2, burette 2 is transparent material, there is scale 201 at burette 2 side, conveniently carry out the judgement of inside liquid level, the diameter diminishes gradually in the below of burette 2, be connected with pipe 6 simultaneously.

Furthermore, thrust ball bearings 7 are arranged between the upper side surface and the lower side surface of the adjusting wheel 5 and the supporting beam 101, and the thrust ball bearings 7 are arranged between the screw 401 and the piston head 404 in the piston 4, so that the rotation resistance of the piston 4 in the axial movement process is reduced. The conduit 6 is a plastic hose, can be twisted at any angle, and is convenient for carrying out titration tests of various styles. The diameter of the rubber head 405 is larger than that of the dropper 2, and the rubber head and the dropper 2 are in interference fit, so that good sealing performance in the dropper 2 is guaranteed. The side surface of the adjusting wheel 5 is provided with a convex edge 502, so that the friction in use is increased, and the rotation is convenient.

The working principle is as follows: before use, reagent is required to be added into the dropper 2, and the reagent is added into the dropper in two ways, namely: reversely rotating the adjusting wheel 5 or the hand wheel 402 to enable the piston 4 to move upwards, then reversely rotating the hand to screw the bolt 301, releasing the dropper clamp 3 to take off the dropper 2, clamping the conduit 6 by any other method known by a person skilled in the art to prevent liquid from flowing out, adding a reagent into the dropper 2, then putting the dropper 2 back to the original position and clamping the dropper 2 by the dropper clamp 3, and positively rotating the adjusting wheel 5 or the hand wheel 402 to enable the piston 4 to enter the dropper 2 and release the conduit 6; the other method is as follows: the adjustment wheel 5 or the hand wheel 402 is rotated to make the piston 4 reach the lowest point of the dropper 2, then the guide tube 6 is immersed into the container filled with the reagent, and the reagent can be sucked into the dropper 2 by rotating the adjustment wheel 5 or the hand wheel 402 reversely. When using, can carry out multiple experiments such as contrast test or sequential titration experiment, place burette 2's below with titration test's one or more container, can realize the slow downstream of piston 4 through stirring regulating wheel 5 alone, extrude the liquid in burette 2 from pipe 6, realize slow comparatively accurate titration, can realize the relatively quick removal of piston 4 through waveing hand wheel 402 alone, realize comparatively quick and rough titration, the two can combine mutually and use.

It should be noted that the rotation speeds of the adjustment wheel 5 and the hand wheel 402 are different, and the difference is caused by different force-applying positions of human bodies during use, in the process of using the adjustment wheel 5, the adjustment wheel 5 needs to be stirred by fingers, force is applied by the fingers, so the speed is relatively slow, but the accuracy is relatively high, in the process of using the hand wheel 402, the handle 403 needs to be held by hands, and the hand wheel 402 needs to be rotated by arms, so the speed is relatively high, but the accuracy is relatively low.

Further, the above-mentioned fixed connection and fixed mounting are to be understood in a broad sense unless otherwise specifically stated or limited, and may be, for example, welding, gluing, or integrally formed, as is conventional in the art.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The titration apparatus for the high school chemical test is characterized by comprising a base, a dropper clamp, a piston, an adjusting wheel and a conduit, wherein the base of the titration apparatus is provided with two groups of titration apparatuses which are arranged oppositely, each group of titration apparatuses is provided with a support beam, the support beam is provided with a positioning through hole vertical to the ground, a screw rod on the piston penetrates through the positioning through hole, the adjusting wheel is connected with the screw rod of the piston in a threaded manner, the adjusting wheel is positioned by the support beam so that the adjusting wheel can only rotate, the piston can move up and down by rotating the adjusting wheel, a hand wheel is arranged above the screw rod in the piston, the hand wheel is provided with a handle, a piston head is hinged below the screw rod in the piston, and the piston head and the screw rod can coaxially rotate relatively, the improved dropper is characterized in that the lower end of the piston head is connected with a rubber head, the supporting beam is also provided with a dropper seat, the supporting beam is hinged with the dropper clamp, the dropper seat and the dropper clamp are matched to clamp the dropper, the piston is inserted into the dropper, the dropper is made of transparent materials, scales are arranged on the side face of the dropper, and the lower part of the dropper is connected with the conduit.

2. The titration apparatus for high school chemistry experiments according to claim 1, wherein thrust ball bearings are arranged between the upper and lower side surfaces of the regulating wheel and the supporting beam, and a thrust ball bearing is arranged between the screw rod and the piston head in the piston.

3. The titration apparatus for high school chemical experiments according to claim 1, wherein the conduit is a plastic hose, and can be twisted at any angle.

4. The titration apparatus for high school chemical experiments according to claim 1, wherein the diameter of the rubber head is larger than the diameter of the dropper.

5. The titration apparatus according to claim 1, wherein the regulating wheel is provided with a rib on the side to increase friction during use.