Laboratory burette rack

Abstract

The utility model belongs to the field of laboratory burette racks, and provides a laboratory burette rack which comprises a base, two symmetrically arranged limiting rods fixedly connected to the upper surface of the base and two rectangular columns slidably connected to the surfaces of the two limiting rods, and the rectangular columns are provided with mounting assemblies used for mounting the rectangular columns on the limiting rods. A limiting assembly for limiting the burette is arranged on one side of the rectangular column; a burette is placed between the two arc-shaped rubber pads on the inner sides of the two rectangular rods, then the output end of the air cylinder is controlled to move outwards, the first rotating rod and the second rotating rod can be driven to rotate, the two rectangular rods are close to each other at the moment, and therefore the burette can be clamped by the two arc-shaped rubber pads; the burette can be further clamped by the other two arc-shaped rubber pads by repeating the operation, and compared with an existing burette bracket, the burette bracket disclosed by the utility model can be used for conveniently clamping burettes with different outer diameters, and is more convenient to use.

Description

Technical Field

[0001] The utility model belongs to the field of laboratory burette holders, and specifically relates to a laboratory burette holder. Background Art

[0002] A burette is a precision glass instrument mainly used for measuring liquids or performing titration operations in titration analysis. It mainly consists of a slender tube body with precise graduations. There is a glass piston or a plastic stopcock at the upper end of the tube to control the outflow of the liquid. Burettes are divided into two types: acid burettes and base burettes. The main difference lies in the material and design of their pistons or stopcocks to adapt to solutions of different properties.

[0003] In the Chinese utility model patent with the publication number CN217663439U, a burette holder is disclosed, which includes a support base. Four groups of adjusting lead screws are threadedly connected to the support base at intervals. One end of each of the four groups of adjusting lead screws is fixedly connected to an adjusting handle, and the other end is rotatably connected to a base. A support rod is fixedly connected to the support base, and a support crossbar is slidably connected to the support rod. A locking screw rod cooperating with the support rod is threadedly connected to the support crossbar. In this utility model, the second bracket overcomes the action of the clamping spring, so that there is a gap between the first clamping column and the second clamping column. The burette body is moved between the first clamping column and the second clamping column, and the second bracket is loosened. Under the action of the clamping spring, the first clamping column and the second clamping column clamp the burette body to keep the burette body stationary.

[0004] Regarding the above related technologies, the inventor believes that there are the following defects: When the burette holder clamps the burette, the gap between the first clamping column and the second clamping column is not convenient for clamping burettes with different outer diameters, and it is not convenient to use.

[0005] Therefore, those skilled in the art have proposed a laboratory burette holder to solve the problems raised in the background art. Content of the Utility Model

[0006] In order to solve the above technical problems, the utility model provides a laboratory burette holder to solve the problem that when the existing burette holder clamps the burette, the gap between the first clamping column and the second clamping column is not convenient for clamping burettes with different outer diameters, and it is not convenient to use.

[0007] A laboratory burette holder includes a base, two symmetrically arranged limiting rods fixedly connected to the upper surface of the base, and two rectangular columns slidably connected to the surfaces of the two limiting rods. An installation component for installing the rectangular columns on the limiting rods is arranged on the rectangular columns, and a limiting component for limiting the burette is arranged on one side of the rectangular columns;

[0008] The limiting component includes two symmetrically arranged round rods slidably connected inside the rectangular column, a rectangular rod fixedly connected to one end of the round rod, a first rotating rod rotatably connected to the upper surface of one rectangular rod, a second rotating rod rotatably connected to the upper surface of the first rotating rod, and a rotating column rotatably connected to the lower surface of the second rotating rod. The lower end of the rotating column is rotatably connected to the upper surface of the other rectangular rod.

[0009] Preferably, a cylinder is installed on the front end face of the rectangular column, a connecting block is installed at the output end of the cylinder, and the upper surface of the connecting block is rotatably connected to the lower surface of the first rotating rod.

[0010] Preferably, an arc-shaped rubber pad is fixedly connected to the inner side surface of the rectangular rod, and a round block is fixedly connected to the other end of the round rod.

[0011] Through the above technical solution, during use, the application scenario of the present device is to facilitate clamping of burettes with different outer diameters. The specific operation is as follows: Place the burette between the two arc-shaped rubber pads on the inner sides of the two rectangular rods, and then control the output end of the cylinder to move outwards, which can drive the first rotating rod and the second rotating rod to rotate. At this time, the two rectangular rods approach each other, so that the two arc-shaped rubber pads can clamp the burette. Repeating the above operation can further clamp the burette with the other two arc-shaped rubber pads. Compared with the existing burette holders, the present device can facilitate clamping of burettes with different outer diameters and is more convenient to use.

[0012] Preferably, the installation component includes a clamping groove opened on the side surface of the limiting rod, a sliding groove opened inside the rectangular column, a pull rod slidably connected to both ends of the rectangular column, a wedge-shaped block fixedly connected to one end of the pull rod, and a spring sleeved on the surface of the pull rod. One end of the spring is fixedly connected to one side of the wedge-shaped block, and the other end of the spring is fixedly connected to one end of the sliding groove.

[0013] Preferably, limiting grooves are opened at both the upper end and the lower end of the sliding groove, and limiting blocks are slidably connected inside the limiting grooves. One end of each of the two limiting blocks is fixedly connected to the upper end and the lower end of the wedge-shaped block respectively.

[0014] Preferably, a plurality of clamping grooves are opened and evenly distributed on the side surface of the limiting rod, and the wedge-shaped block is located in one of the clamping grooves.

[0015] Through the above technical solution, during use, by pulling the two pull rods on the rectangular column, the wedge-shaped block can be pulled into the sliding groove. At this time, the spring is in a compressed state. Then, slide the rectangular column on the surface of the limiting rod. After adjusting the position of the rectangular column, release the pull rod to allow the spring to return to its initial state, so that the wedge-shaped block can be clamped in the clamping groove on the limiting rod, which can facilitate clamping of burettes with different lengths.

[0016] Compared with the prior art, the present utility model has the following beneficial effects:

[0017] 1. The utility model clamps a burette by placing it between two arc-shaped rubber pads inside two rectangular rods. Subsequently, by controlling the outward movement of the output end of the cylinder, the first rotating rod and the second rotating rod can be driven to rotate, and at this time, the two rectangular rods approach each other, so that the two arc-shaped rubber pads can clamp the burette. Repeating the above operation can further clamp the burette with another two arc-shaped rubber pads. Compared with the existing burette holder, this device can facilitate the clamping of burettes with different outer diameters and is more convenient to use.

[0018] 2. The utility model can pull the wedge block into the chute by pulling two pull rods on the rectangular column. At this time, the spring is in a compressed state. Subsequently, slide the rectangular column on the surface of the limiting rod. After adjusting the position of the rectangular column, release the pull rod to allow the spring to return to its initial state, so that the wedge block can be clamped in the card slot on the limiting rod, thus facilitating the clamping of burettes with different lengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 is a schematic sectional structure diagram of the utility model;

[0021] Figure 3 is Figure 2 an enlarged schematic diagram of the structure at A in

[0022] Figure 4 is a schematic top view structure diagram of the utility model.

[0023] In the figure:

[0024] 1. Base; 101. Limiting rod; 102. Card slot; 103. Chute; 104. Pull rod; 105. Wedge block; 106. Spring; 107. Limiting groove; 108. Limiting block; 2. Rectangular column; 201. Round rod; 202. Rectangular rod; 203. Arc-shaped rubber pad; 204. First rotating rod; 205. Second rotating rod; 206. Rotating column; 207. Cylinder; 208. Connecting block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following further describes in detail the embodiments of the utility model in conjunction with the drawings and examples. The following examples are used to illustrate the utility model but cannot be used to limit the scope of the utility model.

[0026] Example 1: As shown in the attached Figure 1 to the attached Figure 4As shown in the figure: The utility model provides a laboratory burette stand, which includes a base 1, two symmetrically arranged limiting rods 101 fixedly connected to the upper surface of the base 1, and two rectangular columns 2 slidably connected to the surfaces of the two limiting rods 101. An installation component for installing the rectangular columns 2 on the limiting rods 101 is arranged on the rectangular columns 2, and a limiting component for limiting the burette is arranged on one side of the rectangular columns 2;

[0027] The limiting component includes two symmetrically arranged round rods 201 slidably connected to the inside of the rectangular column 2, a rectangular rod 202 fixedly connected to one end of the round rod 201, a first rotating rod 204 rotatably connected to the upper surface of one of the rectangular rods 202, a second rotating rod 205 rotatably connected to the upper surface of the first rotating rod 204, and a rotating column 206 rotatably connected to the lower surface of the second rotating rod 205. The lower end of the rotating column 206 is rotatably connected to the upper surface of the other rectangular rod 202.

[0028] A cylinder 207 is installed on the front end face of the rectangular column 2, a connecting block 208 is installed at the output end of the cylinder 207, and the upper surface of the connecting block 208 is rotatably connected to the lower surface of the first rotating rod 204.

[0029] An arc-shaped rubber pad 203 is fixedly connected to the inner side surface of the rectangular rod 202, and a round block is fixedly connected to the other end of the round rod 201.

[0030] As can be seen from the above, during use, the application scenario of this device is to facilitate the clamping of burettes with different outer diameters. The specific operation is to place the burette between the two arc-shaped rubber pads 203 on the inner sides of the two rectangular rods 202, and then control the output end of the cylinder 207 to move outwards, which can drive the first rotating rod 204 and the second rotating rod 205 to rotate. At this time, the two rectangular rods 202 approach each other, so that the two arc-shaped rubber pads 203 can clamp the burette. Repeating the above operation can make the other two arc-shaped rubber pads 203 further clamp the burette. Compared with the existing burette holders, this device can facilitate the clamping of burettes with different outer diameters and is more convenient to use.

[0031] Embodiment 2: On the basis of Embodiment 1, the installation component includes a card slot 102 opened on the side surface of the limiting rod 101, a sliding slot 103 opened inside the rectangular column 2, a pull rod 104 slidably connected to both ends of the rectangular column 2, a wedge-shaped block 105 fixedly connected to one end of the pull rod 104, and a spring 106 sleeved on the surface of the pull rod 104. One end of the spring 106 is fixedly connected to one side of the wedge-shaped block 105, and the other end of the spring 106 is fixedly connected to one end of the sliding slot 103.

[0032] Limiting slots 107 are opened at both the upper and lower ends of the sliding slot 103, and limiting blocks 108 are slidably connected in the limiting slots 107. One end of each of the two limiting blocks 108 is fixedly connected to the upper and lower ends of the wedge-shaped block 105 respectively.

[0033] A plurality of card slots 102 are provided and are evenly distributed on the side surface of the limiting rod 101, and the wedge-shaped block 105 is located in one of the card slots 102.

[0034] As can be seen from the above, during use, by pulling the two pull rods 104 on the rectangular column 2, the wedge-shaped block 105 can be pulled into the sliding groove 103. At this time, the spring 106 is in a compressed state. Then, slide the rectangular column 2 on the surface of the limiting rod 101. After adjusting the position of the rectangular column 2, release the pull rod 104 to allow the spring 106 to return to its initial state, so that the wedge-shaped block 105 can be clamped in the card slot 102 on the limiting rod 101, thereby facilitating the clamping of burettes of different lengths.

[0035] The embodiments of the present invention are given for the purposes of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0036] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those of ordinary skill in the art.

[0037] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more unless otherwise specifically defined.

Claims

1. A laboratory burette stand, characterized in that: It includes a base (1), two symmetrically arranged limiting rods (101) fixedly connected to the upper surface of the base (1), and two rectangular columns (2) slidably connected to the surfaces of the two limiting rods (101). An installation component for installing it on the limiting rods (101) is provided on the rectangular columns (2), and a limiting component for limiting the burette is provided on one side of the rectangular columns (2). The limiting component includes two symmetrically arranged round rods (201) slidably connected to the rectangular columns (2), a rectangular rod (202) fixedly connected to one end of the round rod (201), a first rotating rod (204) rotatably connected to the upper surface of one of the rectangular rods (202), a second rotating rod (205) rotatably connected to the upper surface of the first rotating rod (204), and a rotating column (206) rotatably connected to the lower surface of the second rotating rod (205). The lower end of the rotating column (206) is rotatably connected to the upper surface of the other rectangular rod (202).

2. The laboratory burette stand according to claim 1, characterized in that: A cylinder (207) is installed on the front end face of the rectangular column (2), and a connecting block (208) is installed at the output end of the cylinder (207). The upper surface of the connecting block (208) is rotatably connected to the lower surface of the first rotating rod (204).

3. The laboratory burette holder according to claim 2, characterized in that: An arc-shaped rubber pad (203) is fixedly connected to the inner side surface of the rectangular rod (202), and a round block is fixedly connected to the other end of the round rod (201).

4. The laboratory burette holder according to claim 3, wherein: The installation component includes a card slot (102) opened on the side surface of the limiting rod (101), a sliding groove (103) opened inside the rectangular column (2), a pull rod (104) slidably connected to both ends of the rectangular column (2), a wedge block (105) fixedly connected to one end of the pull rod (104), and a spring (106) sleeved on the surface of the pull rod (104). One end of the spring (106) is fixedly connected to one side of the wedge block (105), and the other end of the spring (106) is fixedly connected to one end of the sliding groove (103).

5. The laboratory burette holder according to claim 4, wherein: Limit slots (107) are opened at both the upper end and the lower end of the sliding groove (103), and limit blocks (108) are slidably connected in the limit slots (107). One end of each of the two limit blocks (108) is fixedly connected to the upper end and the lower end of the wedge block (105) respectively.

6. The laboratory burette stand according to claim 5, wherein: A number of card slots (102) are opened and evenly distributed on the side surface of the limiting rod (101), and the wedge block (105) is located in one of the card slots (102).

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