Adjustable titration volumetric burette rack

Abstract

The utility model relates to the technical field of chemical experiment appliances, and discloses an adjustable titration volumetric burette stand, a fixing device is composed of a fixing cylinder, a sliding disc, a limiting column, a moving rod and a spring, the fixing cylinder is fixedly installed at the top of a connecting block, the sliding disc is slidably installed inside the fixing cylinder, and the limiting column is installed on the sliding disc. The limiting column is fixedly installed at the bottom of the sliding disc, the moving rod is fixedly installed at the top of the sliding disc, and the spring is connected to the surface of the moving rod in a sleeving mode. According to the adjustable titration volumetric burette rack, a hand wheel is rotated, under the action of a first bevel gear and a second bevel gear, a threaded rod can be rotated, under the action of a threaded sleeve, a connecting block can be driven to ascend and descend, a moving rod is pulled, a limiting column is separated from a limiting groove, a strip-shaped block slides to a proper position, then the moving rod is loosened, and under the action of a spring, the titration volumetric burette rack is fixed. And the limiting columns can enter the limiting grooves again, the strip-shaped blocks at different positions can be fixed, and adjustment is convenient and fast.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical experiment instrument technical field, concretely is a kind of adjustable titration volumetric burette rack. BACKGROUND

[0002] In the field of chemical analysis experiment, titration operation as key quantitative analysis method occupies an important position. As the core instrument of this operation, the accurate use of burette cannot be separated from burette rack. Burette rack can stably support burette, thereby effectively guaranteeing that titration process is stable and accurate.

[0003] Patent No. 201821018043.2 discloses a kind of adjustable titration volumetric burette rack, including support base, the top central outer wall of support base is connected with the support plate of vertical arrangement by bolt, the first recess of the middle outer wall of one end of support plate is vertically arranged, and the inner wall of first recess is connected with the sliding guide rail of vertical arrangement by bolt, the outer wall of one end of sliding guide rail is connected with the damping sliding block of sliding connection, and the other end outer wall of damping sliding block is connected with the support sleeve of horizontal arrangement by bolt, the inner wall of circumferential both ends of support sleeve is slidably connected with the support rod of horizontal arrangement, and the top outer wall of two support rods is provided with the distance evenly distributed bayonet slot.

[0004] The adjustable titration volumetric burette rack is provided with an electric telescopic rod, and a limit block is arranged at one end of the electric telescopic rod. The volume required for titration can be determined by adjusting the position of the limit block and combining the scale on the transparent plastic window. When titrating, the sliding piston is pushed upward until it stops at the limit block, achieving the effect of adjusting the titration volume. However, there is still room for improvement, such as the inconvenience of lifting and horizontal position adjustment of the device, which cannot meet the current needs. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide an adjustable titration volumetric burette rack to solve the problems raised in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an adjustable titration volumetric burette rack, including support base, fixed column, adjusting device, fixing device, the fixed column is fixedly installed on the top of support base, the adjusting device is arranged in the interior of fixed column, and the fixing device is arranged on the surface of adjusting device.

[0007] The adjusting device is composed of a threaded rod, a first bevel gear, a threaded sleeve, a hand wheel, a second bevel gear, a connecting block and a strip-shaped block, the threaded rod is rotationally arranged in the fixed column, the first bevel gear is fixedly arranged on the surface of the threaded rod, the threaded sleeve is threadedly arranged on the surface of the threaded rod, the hand wheel is rotationally arranged in the fixed column, the second bevel gear is fixedly arranged on the surface of the hand wheel, the connecting block is fixedly arranged on the side of the threaded sleeve, and the strip-shaped block is slidingly arranged in the connecting block.

[0008] The fixing device is composed of a fixed cylinder, a sliding disc, a limiting column, a moving rod and a spring, the fixed cylinder is fixedly arranged on the top of the connecting block, the sliding disc is slidingly arranged in the fixed cylinder, the limiting column is fixedly arranged on the bottom of the sliding disc, the moving rod is fixedly arranged on the top of the sliding disc, and the spring is sleeved on the surface of the moving rod.

[0009] Preferably, the first bevel gear and the second bevel gear are engaged, the hand wheel is rotated, and the threaded rod can be rotated under the action of the first bevel gear and the second bevel gear.

[0010] Preferably, a moving groove matched with the threaded sleeve is arranged in the fixed column, so that the threaded sleeve can move in the fixed column.

[0011] Preferably, a sliding groove matched with the strip-shaped block is arranged in the connecting block, so that the strip-shaped block can slide in the connecting block.

[0012] Preferably, a limiting groove matched with the limiting column is linearly arranged in the strip-shaped block, so that the limiting column can fix the strip-shaped block at different positions.

[0013] Preferably, one end of the spring is abutted with the fixed cylinder, and the other end of the spring is abutted with the sliding disc, so that the spring is arranged to reset the sliding disc.

[0014] Preferably, the connecting block, the strip-shaped block, the fixed cylinder, the sliding disc, the limiting column, the moving rod and the spring are arranged in one group, and two groups are symmetrically arranged on the side of the threaded sleeve.

[0015] Compared with the prior art, the adjustable titration volume type burette rack has the advantages that the threaded rod can be rotated under the action of the first bevel gear and the second bevel gear by rotating the hand wheel, the connecting block can be lifted under the action of the threaded sleeve, the moving rod is pulled, the limiting column is separated from the limiting groove, the strip-shaped block is slid to a suitable position, the moving rod is released, the limiting column is re-entered into the limiting groove under the action of the spring, the strip-shaped block at different positions can be fixed, and the adjustment is convenient and fast. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the utility model.

[0017] Figure 2 It is the structure schematic drawing of threaded rod, threaded sleeve and connecting block of the utility model;

[0018] Figure 3 It is the structure schematic drawing of hand wheel, second bevel gear and strip-shaped block of the utility model;

[0019] Figure 4 It is the structure schematic drawing of fixed cylinder, sliding disc and limiting column of the utility model.

[0020] In the drawing: 1, support base; 2, fixed column; 3, adjusting device; 301, threaded rod; 302, first bevel gear; 303, threaded sleeve; 304, hand wheel; 305, second bevel gear; 306, connecting block; 307, strip-shaped block; 4, fixing device; 401, fixed cylinder; 402, sliding disc; 403, limiting column; 404, moving rod; 405, spring. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: adjustable titration volume type burette rack, including support base 1, fixed column 2, adjusting device 3, fixing device 4, fixed column 2 is fixedly installed in the top of support base 1, adjusting device 3 is set to the inside of fixed column 2, and fixing device 4 is set to the surface of adjusting device 3.

[0023] The adjusting device 3 is composed of a threaded rod 301, a first bevel gear 302, a threaded sleeve 303, a hand wheel 304, a second bevel gear 305, a connecting block 306 and a strip-shaped block 307. The threaded rod 301 is rotatably arranged in the fixed column 2. The first bevel gear 302 is fixedly arranged on the surface of the threaded rod 301. The threaded sleeve 303 is threadedly arranged on the surface of the threaded rod 301. A moving groove matched with the threaded sleeve 303 is arranged in the fixed column 2, which facilitates the movement of the threaded sleeve 303 in the fixed column 2. The hand wheel 304 is rotatably arranged in the fixed column 2. The second bevel gear 305 is fixedly arranged on the surface of the hand wheel 304. The first bevel gear 302 is engaged with the second bevel gear 305. Rotating the hand wheel 304 can rotate the threaded rod 301 under the action of the first bevel gear 302 and the second bevel gear 305. The connecting block 306 is fixedly arranged on the side surface of the threaded sleeve 303. The strip-shaped block 307 is slidably arranged in the connecting block 306. A sliding groove matched with the strip-shaped block 307 is arranged in the connecting block 306, which facilitates the sliding of the strip-shaped block 307 in the connecting block 306.

[0024] The fixing device 4 is composed of a fixed cylinder 401, a sliding disc 402, a limiting column 403, a moving rod 404 and a spring 405. The fixed cylinder 401 is fixedly arranged on the top of the connecting block 306. The sliding disc 402 is slidably arranged in the fixed cylinder 401. The limiting column 403 is fixedly arranged on the bottom of the sliding disc 402. A limiting groove matched with the limiting column 403 is arranged in the connecting block 306 in a linear array, which can fix the strip-shaped block 307 at different positions by the limiting column 403. The moving rod 404 is fixedly arranged on the top of the sliding disc 402. The spring 405 is sleeved on the surface of the moving rod 404. One end of the spring 405 abuts against the fixed cylinder 401, and the other end of the spring 405 abuts against the sliding disc 402. The spring 405 is arranged to reset the sliding disc 402. The connecting block 306, the strip-shaped block 307, the fixed cylinder 401, the sliding disc 402, the limiting column 403, the moving rod 404 and the spring 405 are arranged in one group, and there are two groups symmetrically arranged on the side surface of the threaded sleeve 303.

[0025] In use, the hand wheel 304 is rotated, the threaded rod 301 is rotated under the action of the first bevel gear 302 and the second bevel gear 305, the connecting block 306 is lifted under the action of the threaded sleeve 303, the moving rod 404 is pulled, the limiting column 403 is separated from the limiting groove, the strip-shaped block 307 is slid to a suitable position, the moving rod 404 is released, the limiting column 403 reenters the limiting groove under the action of the spring 405, and the strip-shaped block 307 at different positions is fixed. The adjustment is convenient and fast.

[0026] It is to be noted that, in the present text, terms such as first and second, and the like, merely refer to one entity or action being distinguished from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0027] While the embodiments of the present application have been shown and described, it is to be understood that the embodiments can be modified, altered, replaced and varied in many ways without departing from the principles and spirit of the present application.

Claims

1. An adjustable titration volumetric burette stand comprising a supporting base (1), a fixing column (2), an adjusting device (3), a fixing device (4), characterized in that: The fixed column (2) is fixedly installed on the top of the support base (1), the adjusting device (3) is arranged in the fixed column (2), and the fixing device (4) is arranged on the surface of the adjusting device (3). The adjusting device (3) is composed of a threaded rod (301), a first bevel gear (302), a threaded sleeve (303), a hand wheel (304), a second bevel gear (305), a connecting block (306) and a strip-shaped block (307), the threaded rod (301) is rotatably installed in the fixed column (2), the first bevel gear (302) is fixedly installed on the surface of the threaded rod (301), the threaded sleeve (303) is threadedly installed on the surface of the threaded rod (301), the hand wheel (304) is rotatably installed in the fixed column (2), the second bevel gear (305) is fixedly installed on the surface of the hand wheel (304), the connecting block (306) is fixedly installed on the side of the threaded sleeve (303), and the strip-shaped block (307) is slidably installed in the connecting block (306). The fixing device (4) is composed of a fixed cylinder (401), a sliding disc (402), a limiting column (403), a moving rod (404) and a spring (405), the fixed cylinder (401) is fixedly installed on the top of the connecting block (306), the sliding disc (402) is slidably installed in the fixed cylinder (401), the limiting column (403) is fixedly installed on the bottom of the sliding disc (402), the moving rod (404) is fixedly installed on the top of the sliding disc (402), and the spring (405) is sleeved on the surface of the moving rod (404).

2. An adjustable titration volume burette stand according to claim 1, wherein: The first bevel gear (302) and the second bevel gear (305) are engaged.

3. An adjustable burette stand of claim 1, wherein: The fixed column (2) is internally provided with a moving groove matched with the threaded sleeve (303).

4. An adjustable burette holder of claim 1, wherein: The connecting block (306) is internally provided with a sliding groove matched with the strip-shaped block (307).

5. An adjustable burette holder of claim 1, wherein: The strip-shaped block (307) is internally provided with a limiting groove matched with the limiting column (403) in a linear array.

6. An adjustable burette holder of claim 1, wherein: One end of the spring (405) abuts against the fixed cylinder (401), and the other end of the spring (405) abuts against the sliding disc (402).

7. An adjustable burette holder of claim 1, wherein: The connecting block (306), the strip-shaped block (307), the fixed cylinder (401), the sliding disc (402), the limiting column (403), the moving rod (404) and the spring (405) are all one group, and two groups are symmetrically arranged on the side of the threaded sleeve (303).

Images