Reducing burette capable of accurately controlling dropping amount

Abstract

The utility model provides a reducing burette capable of accurately controlling dropping amount, which comprises a burette main body, a scale amplification component and an auxiliary handheld component, and an upper burette for thick dropping liquid is arranged in the burette main body. Compared with the prior art, the burette disclosed by the utility model has the beneficial effects that the burette main body and the auxiliary handheld component are additionally arranged, a switch of the control valve I controls liquid to flow downwards into the transfer tube and the lower burette, a coarse scale mark is used for performing primary dropping amount control, and an auxiliary plugging ball and an auxiliary plugging groove are controlled in a linkage manner to be embedded so as to improve the sealing property; the liquid is controlled to flow out of the burette main body through the on-off of the second control valve, accurate control over the dropping amount is completed through the accurate scale marks, and during use, fingers are inserted into the hand insertion hole to assist in holding the burette main body through the auxiliary handheld assembly, so that high-accuracy dropping amount and high dropping liquid storage can be achieved; and the accurate scale marks are locally amplified, so that the reading accuracy can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the burette technical field, especially relates to a variable diameter burette with accurate control of drop amount. BACKGROUND

[0002] The burette is a kind of laboratory instrument for accurately measuring and releasing liquid volume, is mainly used in titration experiment in chemical analysis, and some variable diameter burettes are used to improve the accurate control of titration amount in actual titration use, the variable diameter burette is a specially designed burette, its characteristics are that the inner diameter has different sizes at different positions, this design makes it can provide more accurate measurement and better operation flexibility under certain experimental conditions, because its inner diameter gradually decreases downward, can reduce the amount of each drop liquid when titration liquid is guided out and further improve titration accuracy.But the variable diameter burette with titration amount accurate control has smaller liquid amount that can be stored in whole, and the titration amount control precision of the burette with more liquid storage amount is insufficient, cannot reach the purpose of high precision in actual accurate use.

[0003] In summary, the burette with precision and storage capacity cannot coexist has some problems in use, so a new structure is hoped to be proposed to solve the above technical problems. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a variable diameter burette with accurate control of drop amount to solve the problems in the background art.

[0005] The utility model realizes the following technical scheme: a variable diameter burette with accurate control of drop amount, including: burette main part, scale amplification subassembly and auxiliary hand-held subassembly, the burette main part is equipped with an upper burette for coarse drop liquid, the upper burette outside is installed with auxiliary hand-held subassembly for the auxiliary holding burette main part, the upper burette lower side is fixedly connected with transfer pipe for the transfer titration liquid, the transfer pipe lower side is fixedly connected with lower burette, the lower burette rear side is equipped with scale amplification subassembly for amplifying accurate scale mark.

[0006] As a preferred implementation, the upper burette upper side is fixedly connected with upper bucket for storing titration liquid and facilitating import, the upper bucket is spherical structure, the upper burette inner side upper end is equipped with variable diameter section one.

[0007] As a preferred embodiment, the diameter of the second variable diameter section is smaller than that of the first variable diameter section, the upper side of the transfer tube is provided with a control valve one, and the lower side of the transfer tube is provided with a control valve two, so that the control valve one can control the drop liquid to flow downward through the upper titration tube, and the control valve two can control the drop liquid to flow downward through the lower titration tube.

[0008] As a preferred embodiment, the inside of the transfer tube is fixedly connected with a group of support frames, and the upper side of the support frame is fixedly connected with an auxiliary sealing spring.

[0009] The upper side of the auxiliary sealing spring is fixedly connected with an auxiliary sealing ball, the lower end of the inside of the upper titration tube is fixedly connected with an auxiliary sealing groove, and the auxiliary sealing ball is mutually sealed and fitted with the auxiliary sealing groove after moving upward.

[0010] As a preferred embodiment, the lower end of the inside of the upper titration tube is connected with a convex block for controlling the lifting of the auxiliary sealing ball through a rotating shaft, the convex block is linked and controlled through the control valve one, the inner diameter of the lower titration tube is smaller than that of the second variable diameter section, and the opening and closing of the control valve one can drive the auxiliary sealing ball to lift through the rotation of the convex block, so as to complete the auxiliary sealing and sealing.

[0011] As a preferred embodiment, the outer side of the lower titration tube is provided with an accurate scale mark for accurately controlling the titration amount, and the outer side of the upper titration tube is provided with a rough scale mark for roughly controlling the titration amount.

[0012] As a preferred embodiment, the auxiliary hand-held assembly is provided with two groups of symmetrical clamping rings, the right side of each of the two groups of clamping rings is fixedly connected with a clamping seat, and the two groups of clamping seats are fastened and connected through bolts and nuts to enable the clamping rings to be clamped and fitted to the outside of the upper titration tube.

[0013] The rear side of the clamping ring is fixedly connected with a hand-held seat, four groups of hand insertion holes are formed in the upper surface of the hand-held seat for inserting hands, the auxiliary hand-held assembly is fitted to the outside of the upper titration tube, the fingers can be inserted into the hand insertion holes, and the auxiliary hand-held assembly can assist in holding the titration tube body.

[0014] As a preferred embodiment, the lower surface of the transfer tube is fixedly connected with a lifting column for lifting and adjusting the scale magnifying assembly, the scale magnifying assembly is provided with a lifting seat, the upper surface of the lifting seat is vertically penetrated to form a lifting hole and is movably fitted with the lifting column.

[0015] As a preferred embodiment, the rear side of the lifting seat is provided with a positioning threaded hole facing the lifting hole, a positioning stud is threadedly fitted in the inside of the positioning threaded hole, the right side of the lifting seat is fixedly connected with a mounting bracket, and a magnifying glass is installed in the inside of the mounting bracket. According to the position of the drop liquid flowing downward along the scale, the scale magnifying assembly is lifted and moved, and the fine scale of the accurate scale mark is enlarged and displayed through the magnifying glass.

[0016] The beneficial effects of the present application are as follows: by adding the burette main body and the auxiliary hand-holding assembly, the control valve one controls the liquid to flow into the transfer pipe and the lower burette, the coarse scale mark is used for initial drop control, the auxiliary plugging ball and the auxiliary plugging groove are embedded to improve the sealing performance, the control valve two controls the liquid to flow out of the burette main body, and the accurate drop control is completed through the accurate scale mark; the middle finger is inserted into the hand insertion hole to hold the burette main body through the auxiliary hand-holding assembly, high-precision drop control and high drop storage are realized, the accurate scale mark is partially enlarged through the burette main body and the scale amplification assembly, and the reading accuracy is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a whole structure schematic diagram of the variable-diameter burette with accurate drop control of the present application.

[0019] Figure 2 It is a structure schematic diagram of the burette main body in the variable-diameter burette with accurate drop control of the present application.

[0020] Figure 3 It is a local sectional view schematic diagram of the burette main body in the variable-diameter burette with accurate drop control of the present application.

[0021] Figure 4 It is a structure schematic diagram of the scale amplification assembly in the variable-diameter burette with accurate drop control of the present application.

[0022] Figure 5 It is a structure schematic diagram of the auxiliary hand-holding assembly in the variable-diameter burette with accurate drop control of the present application.

[0023] In the figure, 100-burette main body, 101-upper bucket, 102-upper burette, 103-coarse scale mark, 104-variable-diameter section one, 105-variable-diameter section two, 106-transfer pipe, 107-control valve one, 108-control valve two, 109-support frame, 110-auxiliary plugging spring, 111-auxiliary plugging ball, 112-protruding block, 113-auxiliary plugging groove, 114-lower burette, 115-accurate scale mark, 116-lifting column;

[0024] 200-Scale magnification assembly, 201-Lifting base, 202-Lifting hole, 203-Positioning stud, 204-Mounting bracket, 205-Magnifying glass;

[0025] 300-Auxiliary handheld component, 301-Clamping ring, 302-Clamping seat, 303-Handheld seat, 304-Hand insertion hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1 to 5 This utility model provides a technical solution: a variable diameter burette with precise control of the drip volume, comprising: a burette body 100, a scale magnification component 200 and an auxiliary handheld component 300, wherein the burette body 100 is provided with an upper burette 102 for coarse dripping;

[0028] An auxiliary hand-held component 300 for assisting in holding the burette body 100 is installed on the outside of the upper burette 102. A transfer tube 106 for transferring titrated liquid is fixedly connected below the upper burette 102. A lower burette 114 is fixedly connected below the transfer tube 106. A scale magnification component 200 for magnifying the precision scale 115 is provided on the rear side of the lower burette 114.

[0029] The upper burette 102 is fixedly connected to an upper container 101 for storing titration liquid and facilitating its introduction. The upper container 101 has a spherical structure, and the upper end of the inner side of the upper burette 102 is provided with a variable diameter section 104.

[0030] Below the first diameter-changing section 104, there is a second diameter-changing section 105. The diameter of the second diameter-changing section 105 is smaller than that of the first diameter-changing section 104. The upper side of the transfer pipe 106 is equipped with a first control valve 107, and the lower side of the transfer pipe 106 is equipped with a second control valve 108. The first control valve 107 controls the dripping liquid to flow down through the upper burette 102, and the second control valve 108 controls the dripping liquid to flow down through the lower burette 114.

[0031] A set of support frames 109 is fixedly connected to the inner side of the transfer pipe 106, and an auxiliary sealing spring 110 is fixedly connected above the support frame 109.

[0032] An auxiliary sealing ball 111 is fixedly connected above the auxiliary sealing spring 110, and an auxiliary sealing groove 113 is fixedly connected to the lower end of the inner side of the upper burette 102. After the auxiliary sealing ball 111 moves upward, it seals and fits into the auxiliary sealing groove 113.

[0033] The lower inner end of the upper burette 102 is connected to a convex block 112 via a rotating shaft for controlling the raising and lowering of the auxiliary sealing ball 111. The convex block 112 is controlled by a control valve 107. The inner diameter of the lower burette 114 is smaller than the inner diameter of the variable diameter section 105. The opening and closing of the control valve 107 can drive the auxiliary sealing ball 111 to rise and fall by rotating the convex block 112, thus completing the auxiliary sealing.

[0034] The lower burette 114 has a precision scale 115 on its outer side for precise control of the titration amount, and the upper burette 102 has a coarse scale 103 on its outer side for coarse control of the titration amount.

[0035] The auxiliary handheld component 300 is provided with two sets of symmetrically arranged locking rings 301. Each set of locking rings 301 has a locking seat 302 fixedly connected to its right side. The two sets of locking seats 302 are fastened together with bolts and nuts so that the locking rings 301 are clamped and fitted to the outside of the upper burette 102.

[0036] A handhold 303 is fixedly connected to the rear side of the locking ring 301. The upper surface of the handhold 303 has four sets of hand insertion holes 304 for hand insertion. The auxiliary handhold component 300 is fitted onto the outside of the upper burette 102 and fixed, allowing fingers to be inserted into the hand insertion holes 304. The auxiliary handhold component 300 assists in holding the burette body 100.

[0037] Please see Figures 1-3 and Figure 5 As the first embodiment of this utility model: First, the user introduces the liquid to be titrated into the inner side of the burette body 100 through the upper container 101. The liquid is controlled to flow down into the transfer tube 106 and the lower burette 114 by the control valve 107. The initial drip volume is controlled by the coarse scale 103. The auxiliary sealing ball 111 is raised and lowered by the linkage control of the convex block 112, and the auxiliary sealing ball 111 is fitted into the auxiliary sealing groove 113 to improve the sealing performance. Second, the user can control the liquid to flow out of the burette body 100 by the control valve 108, and complete the precise drip volume control by the precision scale 115. The auxiliary hand-held component 300 is fitted and fixed to the outside of the upper burette 102, and the user can insert his / her fingers into the hand insertion hole 304. The auxiliary hand-held component 300 assists in holding the burette body 100, thereby achieving high precision drip volume and high drip storage.

[0038] The lower left end of the transfer tube 106 is fixedly connected to a lifting column 116 for adjusting the height of the auxiliary scale magnification component 200. The scale magnification component 200 is provided with a lifting seat 201. The upper surface of the lifting seat 201 is vertically penetrated to form a lifting hole 202 and is movably fitted with the lifting column 116.

[0039] The rear side of the lifting seat 201 has a positioning threaded hole facing the lifting hole 202. The positioning threaded hole is threaded with a positioning stud 203. The right side of the lifting seat 201 is fixedly connected to the mounting bracket 204. A magnifying glass 205 is installed inside the mounting bracket 204. The scale magnification component 200 is raised and lowered according to the position of the dripping liquid on the scale. The magnifying glass 205 magnifies and displays the fine scale of the precision scale mark 115.

[0040] Please see Figures 1-2 and Figure 4 As a second embodiment of this utility model: Based on the first embodiment above, the precision scale 115 has a fine scale value. Because the compact scale value setting may not be able to be quickly identified visually, the user can move the lifting seat 201 outside the lifting column 116 to the position where the reading is required, and use the positioning stud 203 to rotate inside the positioning threaded hole to fix the position of the lifting seat 201. The fine scale of the precision scale 115 is magnified and displayed by the magnifying glass 205, thereby assisting in the precise control of the drip volume.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A variable-diameter burette with precise control over the drip volume, comprising: The burette body (100), the scale magnification assembly (200), and the auxiliary handheld assembly (300) are characterized in that: the burette body (100) is provided with an upper burette (102) for coarse droplets; An auxiliary handheld component (300) for assisting in holding the burette body (100) is installed on the outside of the upper burette (102). A transfer tube (106) for transferring titrated liquid is fixedly connected below the upper burette (102). A lower burette (114) is fixedly connected below the transfer tube (106). A scale magnification component (200) for magnifying the precision scale (115) is provided on the rear side of the lower burette (114).

2. A variable-diameter burette with precise control of drip volume as described in claim 1, characterized in that: The upper burette (102) is fixedly connected to an upper container (101) for storing titration liquid and facilitating its introduction. The upper container (101) has a spherical structure, and the upper end of the inner side of the upper burette (102) is provided with a variable diameter section (104).

3. A variable-diameter burette with precise control of drip volume as described in claim 2, characterized in that: Below the first diameter-changing section (104) is a second diameter-changing section (105), the diameter of the second diameter-changing section (105) is smaller than that of the first diameter-changing section (104), the upper side of the transfer pipe (106) is provided with a first control valve (107), and the lower side of the transfer pipe (106) is provided with a second control valve (108).

4. A variable-diameter burette with precise control of drip volume as described in claim 3, characterized in that: A set of support frames (109) is fixedly connected to the inner side of the transfer pipe (106), and an auxiliary sealing spring (110) is fixedly connected above the support frame (109); An auxiliary sealing ball (111) is fixedly connected above the auxiliary sealing spring (110), and an auxiliary sealing groove (113) is fixedly connected to the lower end of the inner side of the upper burette (102). After the auxiliary sealing ball (111) moves upward, it seals and fits into the auxiliary sealing groove (113).

5. A variable-diameter burette with precise control of drip volume as described in claim 4, characterized in that: The lower end of the inner side of the upper burette (102) is connected by a rotating shaft to a convex block (112) for controlling the lifting and lowering of the auxiliary sealing ball (111). The convex block (112) is controlled by a control valve (107). The inner diameter of the lower burette (114) is smaller than the inner diameter of the variable diameter section (105).

6. A variable-diameter burette with precise control of drip volume as described in claim 5, characterized in that: The lower burette (114) has a precision scale (115) on its outer side for precise control of the titration amount, and the upper burette (102) has a coarse scale (103) on its outer side for coarse control of the titration amount.

7. A variable-diameter burette with precise control of drip volume as described in claim 1, characterized in that: The auxiliary handheld component (300) is provided with two sets of symmetrically arranged locking rings (301). Each set of locking rings (301) is fixedly connected to a locking seat (302) on the right side. The two sets of locking seats (302) are fastened together with bolts and nuts so that the locking rings (301) are clamped and fitted to the outside of the upper burette (102). A hand-held base (303) is fixedly connected to the rear side of the locking ring (301) at the rear end. The upper surface of the hand-held base (303) is provided with four sets of hand insertion holes (304) for hand insertion.

8. A variable-diameter burette with precise control of drip volume as described in claim 1, characterized in that: The lower left end of the transfer tube (106) is fixedly connected to a lifting column (116) for assisting the lifting and lowering adjustment of the scale magnification component (200). The scale magnification component (200) is provided with a lifting seat (201). The upper surface of the lifting seat (201) is vertically penetrated to form a lifting hole (202) and is movably fitted with the lifting column (116).

9. A variable-diameter burette with precise control of drip volume as described in claim 8, characterized in that: The lifting seat (201) has a positioning threaded hole on its rear side facing the lifting hole (202). A positioning stud (203) is threaded inside the positioning threaded hole. A mounting bracket (204) is fixedly connected to the right side of the lifting seat (201). A magnifying glass (205) is installed inside the mounting bracket (204).

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