Liquid adding device for physical and chemical inspection

Abstract

The utility model discloses a liquid adding device for physical and chemical inspection, which comprises a fixing frame and a titration assembly arranged on the fixing frame and used for containing detection liquid, the fixing frame comprises a base and a fixing rod fixed on the base and used for clamping the titration assembly, and the base is provided with a mounting seat which is rotatably connected with the base. A calibration groove and a rotating seat are arranged on the mounting seat, the rotating seat rotates on the mounting seat in one direction, a plurality of detection grooves are formed in the rotating seat, and the calibration groove and the detection grooves rotate on the base and are located below the titration assembly. The mounting seat, the rotating seat, the calibration groove and the plurality of detection grooves can be used for correspondingly placing all containers to be titrated, so that the problem of titration failure caused by confusion of the taking sequence of all the containers in the titration operation process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of food detection, in particular to a liquid adding device used for physical and chemical testing. Background Art

[0002] Food physical and chemical testing refers to the testing of food using physical and chemical methods, using certain measuring tools or instruments. The main content of food physical and chemical testing is the nutritional components and chemical contamination of various foods, including animal foods (such as meat, milk, eggs, aquatic products, bee products), plant foods, beverages, condiments, food additives and health foods.

[0003] In the process of food physical and chemical testing, it is usually necessary to add different amounts of test liquid to multiple containers (petri dishes, etc.) containing the test solution. In order to make the dropwise addition of the test liquid more accurate, the burette is more accurate in adding the amount of the test liquid than the conventional dropper.

[0004] During the drop-adding operation, the burette is fixed on the iron stand. Before the titration operation, a container is set under the burette to receive the solution dripped when the burette is calibrated. After calibration, multiple containers containing the solution to be tested are placed under the burette in turn for titration. However, the iron stand can only be used to fix the burette, and cannot position multiple containers, resulting in the need to frequently replace multiple containers during the drop-adding operation, which is prone to errors in the drop-adding operation. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a liquid adding device for physical and chemical testing, which solves the problem in the prior art that when adding the test liquid, the order of taking the container is easily wrong, resulting in error in the dropping operation.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a liquid adding device for physical and chemical testing, comprising a fixing frame and a titration assembly for containing a test liquid arranged on the fixing frame, wherein the fixing frame comprises a base and a fixing rod fixed on the base for clamping the titration assembly,

[0007] The base is provided with a rotatably connected mounting seat, and the mounting seat is provided with a calibration groove and a rotating seat.

[0008] The rotating seat rotates unidirectionally on the mounting seat, and a plurality of detection slots are arranged on the rotating seat.

[0009] The calibration tank and each detection tank are rotated on the base and are located under the titration component.

[0010] Principle of the utility model:

[0011] The present utility model improves the structure of the existing iron stand. The titration assembly can adopt an existing burette or other structures in the prior art that can achieve quantitative feeding. The titration assembly is fixed on a fixed rod, and a clip on the fixed rod is used to clamp the titration assembly by referring to the clip of the existing iron stand.

[0012] Place the container used for calibrating the burette in the calibration groove, and place the multiple containers filled with the solution to be detected in multiple detection grooves in sequence. Ensure that when the rotating seat rotates unidirectionally in the preset direction, the containers arranged in the respective detection grooves can move in the preset direction.

[0013] During use, fix the titration assembly at an appropriate position on the fixed rod, rotate the mounting seat to position the calibration groove below the titration assembly, and operate the titration assembly for calibration; after calibration is completed, rotate the mounting seat to position the rotating seat below the titration assembly, and make a specific detection groove located below the titration assembly; the titration assembly drops liquid to complete one titration; rotate in the preset direction to place the containers in the respective detection grooves below the titration assembly in sequence for adding the detection liquid drop by drop until the dropping operation is completed, thus realizing the liquid adding operation of the detection liquid.

[0014] Compared with the prior art, the present utility model has the following beneficial effects:

[0015] The mounting seat, rotating seat, calibration groove and multiple detection grooves provided by the present utility model can place the corresponding titration containers respectively, avoiding the problem that the taking order of each container is confused during the titration operation, resulting in the failure of titration.

[0016] Further, a rotating pin is provided on the mounting seat, and the bottom of the mounting seat is rotatably arranged with the rotating pin. A positioning assembly is connected to the mounting seat, and the positioning assembly is used to fix the mounting seat and the base.

[0017] Further, the positioning assembly includes a positioning pin penetrating through the mounting seat and at least two positioning grooves formed on the base. The positioning pin is parallel to the rotating pin and is inserted into any positioning groove, and the two positioning grooves are symmetrically arranged along the axial direction of the rotating pin.

[0018] Further, a compression spring is also included. The compression spring is sleeved on the positioning pin, one end of the compression spring is connected to the positioning pin, and the other end is connected to the mounting seat.

[0019] Further, a rotating shaft is fixed at the bottom of the rotating seat, and the rotating shaft is rotatably connected to the mounting seat. A limiting assembly for limiting the rotation direction of the rotating shaft is provided on the rotating shaft.

[0020] Further, the limiting assembly includes a ratchet and a pawl used in cooperation. The ratchet is coaxially fixed with the rotating shaft, and the pawl is telescopically arranged on the mounting seat.

[0021] Further, the pawl is telescopically arranged on the mounting seat through a connecting member. The connecting member includes a connecting seat, a connecting rod penetrating through the connecting seat, and a telescopic spring sleeved on the connecting rod. The connecting rod is fixed to the pawl. One end of the telescopic spring is connected to the connecting rod, and the other end is connected to the connecting seat. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the present utility model;

[0023] Figure 2 is a top view of the base of the present utility model;

[0024] Figure 3 is a schematic structural diagram of the base of the present utility model;

[0025] Figure 4 is a schematic structural diagram of the cooperation between the pawl and the ratchet of the present utility model.

[0026] In the figure: fixed rod 1, titration assembly 2, clip 3, calibration groove 4, positioning pin 5, compression spring 51, stop block 52, rotating pin 6, connecting seat 7, telescopic spring 8, connecting rod 9, pawl 10, base 11, mounting seat 12, rotating seat 13, rotating shaft 14, ratchet 15, detection groove 16. Detailed Embodiments

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0028] As Figure 1 shown, a liquid adding device for physical and chemical inspection includes a fixing frame and a titration assembly 2 provided on the fixing frame for containing a detection liquid. The fixing frame includes a base 11 and a fixed rod 1 fixed on the base 11 for clamping the titration assembly 2. The fixing frame is equivalent to an iron stand in the prior art. While fixing the titration assembly 2, it can place a container for the solution to be detected. Therefore, the base 11 is horizontally arranged, the fixed rod 1 is vertically fixed on the base 11, and a clip 3 is provided on the fixed rod 1. This clip 3 adopts the clip 3 provided on the iron stand in the prior art. The titration assembly 2 can adopt an existing burette or other structures in the prior art that can achieve quantitative feeding. The titration assembly 2 is fixed on the fixed rod 1, and the clip 3 on the fixed rod 1 is used to clamp the titration assembly 2 with reference to the clip 3 of the existing iron stand.

[0029] To ensure that each container can be placed on the base 11 in the titration order and can avoid the situation that each container is located below the titration assembly 2 in a predetermined order during use, the overall structure of the base 11 is improved in the present utility model. Specifically, a rotatably connected mounting seat 12 is provided on the base 11. A calibration groove 4 and a rotating seat 13 are provided on the mounting seat 12. The rotating seat 13 rotates unidirectionally on the mounting seat 12. A plurality of detection grooves 16 are provided on the rotating seat 13. The calibration groove 4 and each detection groove 16 are singly located below the titration assembly 2 when rotating on the base 11.

[0030] As Figure 1 , 2 , as shown in FIGS. 3, the mounting seat 12 has a strip-shaped block structure. The mounting seat 12 is horizontally arranged along its length direction. A rotating pin 6 is provided in the middle of the mounting seat 12. The rotating pin 6 is rotatably connected to the mounting seat 12 through a bearing, and the rotating pin 6 is fixed to the base 11. The calibration groove 4 is fixed on the mounting seat 12 and has a structure that fits the container. The rotating seat 13 has a circular plate structure. The rotating seat 13 is rotatably arranged on the mounting seat 12 along its axial direction. A plurality of detection grooves 16 are arranged in a circular ring structure on the rotating seat 13. And as Figure 2 , 3 shown, the projection of the leftmost detection groove 16 in the figure and the projection of the calibration groove 4 are symmetrically arranged along the axis of the rotating shaft 14. This way can ensure that after the mounting seat 12 rotates, when each detection groove 16 rotates with the rotating seat 13, each detection groove 16 can also be located below the titration assembly 2 to receive the detection liquid.

[0031] The present utility model improves the structure of the existing iron stand. The container used for receiving the calibration of the burette is placed in the calibration groove 4, and a plurality of containers containing the solution to be detected are sequentially placed in a plurality of detection grooves 16, ensuring that when the rotating seat 13 rotates unidirectionally in a preset direction, the containers arranged in each detection groove 16 can move in a preset direction.

[0032] During use, the titration assembly 2 is fixed at an appropriate position on the fixed rod 1. The mounting seat 12 is rotated to make the calibration groove 4 located below the titration assembly 2, and the titration assembly 2 is operated for calibration. After calibration is completed, the mounting seat 12 is rotated to make the rotating seat 13 located below the titration assembly 2, and a specific detection groove 16 is located below the titration assembly 2. The titration assembly 2 drops the liquid to complete one titration. Rotate in the preset direction to sequentially place the containers in each detection groove 16 below the titration assembly 2 for dropping the detection liquid until the dropping operation is completed, realizing the liquid adding operation of the detection liquid.

[0033] The mounting base 12 is rotatably arranged on the base 11, and the rotation of the mounting base 12 on the base 11 is mainly to displace the detection groove 16 and the calibration groove 4. For this reason, when the titration assembly 2 drops the detection liquid, the mounting base 12 needs to be fixed on the base 11 to avoid the misalignment of the container. For this reason, the present utility model also connects a positioning assembly on the mounting base 12, and the positioning assembly is used to fix the mounting base 12 and the base 11. Specifically, the positioning assembly includes a positioning pin 5 penetrating through the mounting base 12 and at least two positioning grooves opened on the base 11. The positioning pin 5 is parallel to the rotation pin 6 and is inserted into any positioning groove, and the two positioning grooves are symmetrically arranged along the axial direction of the rotation pin 6. As Figure 3 shown, the positioning pin 5 vertically penetrates through the mounting base 12, a stopper 52 is fixed at the upper end of the positioning pin 5, and the lower end of the positioning pin 5 is inserted into the positioning groove. The positioning pin 5 can be a screw rod, and the positioning pin 5 is threadedly connected to the mounting base 12 or the positioning groove. During use, the separation of the positioning pin 5 and the positioning groove can be realized by rotating the positioning pin 5. After the positioning pin 5 and the positioning groove are separated, the rotation of the mounting base 12 can be realized. After the mounting base 12 rotates to the preset position, rotate the positioning pin 5 again to connect the positioning pin 5 and the positioning groove, so as to fix the mounting base 12 and the base 11, and ensure that when the detection groove 16 or the calibration groove 4 on the mounting base 12 is located below the titration assembly 2, the mounting base 12 can be fixedly arranged with the base 11, which is convenient for titration operation.

[0034] To facilitate the use of the positioning pin 5, the positioning assembly further includes a compression spring 51. The compression spring 51 is sleeved on the positioning pin 5, one end of the compression spring 51 is connected to the positioning pin 5, and the other end is connected to the mounting base 12. As Figure 3 shown, the compression spring 51 is located between the stopper 52 and the mounting base 12 and presses the positioning pin 5 downward. During use, an external force is applied to the positioning pin 5 to lift the positioning pin 5 to separate the positioning pin 5 and the positioning groove, and then the mounting base 12 can be rotated; when the mounting base 12 rotates to the preset position, release the external force on the positioning pin 5, and the positioning pin 5 contacts the positioning groove under the action of the compression spring 51, so as to lock the mounting base 12 and the base 11.

[0035] To realize the one-way rotation of the rotating seat 13 on the mounting base 12, as Figure 1 , 3As shown in the figure, a rotating shaft 14 is fixed to the bottom of the rotating seat 13 of the present utility model. The rotating shaft 14 is rotatably connected to the mounting seat 12, and a limiting component for limiting the rotation direction of the rotating shaft 14 is provided on the rotating shaft 14. Specifically, the limiting component includes a ratchet wheel 15 and a pawl 10 that are used in cooperation. The ratchet wheel 15 is coaxially fixed to the rotating shaft 14, and the pawl 10 is telescopically arranged on the mounting seat 12. The pawl 10 is telescopically arranged on the mounting seat 12 through a connecting member. The connecting member includes a connecting seat 7, a connecting rod 9 penetrating through the connecting seat 7, and a telescopic spring 8 sleeved on the connecting rod 9. The connecting rod 9 is fixed to the pawl 10. One end of the telescopic spring 8 is connected to the connecting rod 9, and the other end is connected to the connecting seat 7. As Figure 4 shown, since the pawl 10 has an inclined surface and a limiting surface for abutting against the card slot of the ratchet wheel 15, the ratchet wheel 15 can only drive the pawl 10 to perform a telescopic movement in the horizontal direction under the action of the telescopic spring 8 in accordance with a preset direction, so that the rotating shaft 14 fixedly arranged with the ratchet wheel 15 can rotate unidirectionally on the mounting seat 12. During use, a plurality of containers are placed in the respective detection slots 16 in accordance with a preset direction. When the rotating seat 13 rotates unidirectionally, the plurality of containers rotate in accordance with the preset direction and are located below the titration assembly 2 for titration operation.

[0036] The mounting seat 12, the rotating seat 13, the calibration slot 4 and the plurality of detection slots 16 provided in the present utility model can correspondingly place each container to be titrated, avoiding the problem that the taking order of each container is confused during the titration operation, resulting in the failure of titration.

[0037] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed claims.

Claims

1. A liquid adding device for physical and chemical inspection, comprising a fixing frame and a titration assembly (2) arranged on the fixing frame for containing a detection liquid, characterized in that: The fixing bracket includes a base (11) and a fixing rod (1) fixed on the base (11) for clamping the titration assembly (2). An installation seat (12) is rotatably connected to the base (11), and a calibration groove (4) and a rotating seat (13) are provided on the installation seat (12). The rotating seat (13) rotates unidirectionally on the installation seat (12), and a plurality of detection grooves (16) are provided on the rotating seat (13). The calibration groove (4) and each detection groove (16) rotate singly on the base (11) and are located below the titration assembly (2).

2. The liquid adding device for physical and chemical inspection according to claim 1, characterized in that: A rotating pin (6) is provided on the installation seat (12), the bottom of the installation seat (12) is rotatably arranged with the rotating pin (6), and a positioning assembly is connected to the installation seat (12) for fixing the installation seat (12) and the base (11).

3. The liquid adding device for physical and chemical inspection according to claim 2, characterized in that: The positioning assembly includes a positioning pin (5) penetrating through the installation seat (12) and at least two positioning grooves opened on the base (11). The positioning pin (5) is parallel to the rotating pin (6) and is inserted into any positioning groove. The two positioning grooves are symmetrically arranged along the axial direction of the rotating pin (6).

4. A liquid adding device for physical and chemical inspection according to claim 3, characterized in that: It further includes a compression spring (51). The compression spring (51) is sleeved on the positioning pin (5). One end of the compression spring (51) is connected to the positioning pin (5), and the other end is connected to the installation seat (12).

5. A liquid adding device for physical and chemical inspection according to any one of claims 1-4, characterized in that: A rotating shaft (14) is fixed to the bottom of the rotating seat (13). The rotating shaft (14) is rotatably connected to the installation seat (12), and a limiting assembly for limiting the rotation direction of the rotating shaft (14) is provided on the rotating shaft (14).

6. The liquid adding device for physical and chemical inspection according to claim 5, wherein: The limiting assembly includes a ratchet wheel (15) and a ratchet pawl (10) used in cooperation. The ratchet wheel (15) is coaxially fixed to the rotating shaft (14), and the ratchet pawl (10) is telescopically arranged on the installation seat (12).

7. The liquid adding device for physical and chemical inspection according to claim 6, characterized in that: The ratchet pawl (10) is telescopically arranged on the installation seat (12) through a connecting member. The connecting member includes a connecting seat (7), a connecting rod (9) penetrating through the connecting seat (7), and a telescopic spring (8) sleeved on the connecting rod (9). The connecting rod (9) is fixed to the ratchet pawl (10). One end of the telescopic spring (8) is connected to the connecting rod (9), and the other end is connected to the connecting seat (7).

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