Rapid acid adding device for laboratory

Abstract

The utility model discloses a quick acid adding device for a laboratory, which relates to the technical field of laboratory sample pretreatment and comprises a rack, a plurality of glass tubes vertically and horizontally arranged at the top of the rack, a plurality of digestion tubes and a tube frame for vertically placing the digestion tubes, the glass tubes are used for containing acid liquor, an acid adding port is arranged at the top of one glass tube, and the digestion tubes are arranged on the tube frame. Communicating pipes are arranged between the adjacent glass pipes, glass lower pipes are arranged at the bottom ends of the glass pipes, valve structures are arranged in the glass lower pipes, and the digestion pipes are located under the glass lower pipes and are in one-to-one correspondence with the glass pipes; the pipe frame is used for vertically placing a plurality of digestion pipes, and the alignment of the glass lower pipe and the digestion pipes is realized by pushing the pipe frame. The device disclosed by the utility model is beneficial to quickly adding acid liquor when a laboratory sample is subjected to digestion pretreatment, so that the harm to a human body caused by the fact that acid mist diffuses into air due to slow addition of the acid liquor is reduced, and meanwhile, time and labor are saved when a large batch of samples are prepared.

Description

TECHNICAL FIELD

[0001] The utility model relates to laboratory sample pretreatment technical field especially a kind of acid liquid adding device for laboratory sample (such as food, soil, air filter membrane etc.) digestion. BACKGROUND

[0002] During sample digestion pretreatment in laboratory, acid liquid addition is key link.Currently generally used method is that experimental personnel use graduated pipet, ear bulb cooperation or use pipettor to move acid liquid into sample tube one by one, and this way of adding one by one is time-consuming and laborious, and acid mist is diffused to air due to slow acid liquid addition in the adding process, causing harm to human body.In addition, when handling large quantities of samples, efficiency is low, and experimental personnel need to spend a lot of time and energy in acid liquid addition link, calculated by digesting 200 samples per day. UTILITY MODEL CONTENTS

[0003] In view of the defects in the prior art, the purpose of the utility model is to provide a laboratory rapid acid adding device, specifically, the acid adding device comprises the following structure:

[0004] Frame;

[0005] Multiple glass tubes, the glass tube is used to contain acid liquid, and an acid adding port is formed at the top of any glass tube, and the multiple glass tubes are vertically arranged and horizontally arranged on the top of the frame, and the adjacent glass tubes are connected by the communication pipe provided at the top end side; a glass lower pipe is provided at the bottom end of the glass tube, and a valve structure is provided in the glass lower pipe to control the outflow of acid liquid;

[0006] Multiple digestion tubes, the digestion tube is located directly below the glass lower pipe and corresponds to the glass tube one by one;

[0007] Tube rack, the tube rack is used to vertically place multiple digestion tubes, and the alignment of the glass lower pipe and the digestion tube is realized by pushing the tube rack.

[0008] Further, the valve structure comprises a horizontal perforation formed in the side of each glass lower pipe, the perforation is communicated with the internal cavity of the glass lower pipe, a rotating pin is jointly inserted in each perforation, an outflow hole is formed in the rotating pin located in each perforation, a knob is provided at the outer end of the rotating pin, the rotating pin is driven by rotating the knob to realize the closing and opening of the valve structure.

[0009] Preferably, the bottom end of the glass lower pipe is a slanted outlet structure.

[0010] Preferably, the tube rack is a shelf with 3 rows and 10 holes, and each row of the tube rack can place 10 digestion tubes.

[0011] Furthermore, the frame includes a top beam, side supports below both ends of the top beam, and foot supports connected to the bottom of the side supports, with the top of the glass tube connected to the bottom of the top beam.

[0012] Furthermore, an insertion hole is provided on the top beam corresponding to the acid inlet, and a liquid addition funnel is inserted into the insertion hole.

[0013] Furthermore, the tube rack includes side plates on both sides. When the tube rack is pushed, the side plates on both sides of the tube rack abut against the inner sides of the frame side supports and foot supports.

[0014] Furthermore, three first alignment lines are provided on the top of the side plates on both sides of the tube rack. The three first alignment lines correspond to the three rows of digestion tubes of the tube rack. A second alignment line is provided on the inner side of the side support on both sides. The second alignment line corresponds to the lower glass tube. When the first alignment line and the second alignment line are connected, it can be determined that the digestion tube is located directly below the lower glass tube.

[0015] Furthermore, an acid recovery tank is provided outside one of the side supports. An overflow pipe is connected to the top of the acid recovery tank, and the overflow pipe is connected to the top side of a glass tube. A drain pipe and a drain valve are provided at the bottom of the acid recovery tank.

[0016] Furthermore, a protective shielding glass is provided on the frame on both the front and rear sides of the glass tube.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The device of this invention is beneficial for laboratory samples to be processed before digestion by quickly adding acid solution, reducing the harm to the human body caused by acid mist spreading into the air due to slow acid addition. At the same time, it saves time and effort when processing large batches of samples. Based on the calculation of digesting 200 samples per day, it can save laboratory personnel more than 80% of their time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a front view of the device of this utility model;

[0021] Figure 2 This is a southeast isometric view of the device of this utility model;

[0022] Figure 3This is the southwest isometric view of the device of this utility model;

[0023] Figure 4 This is the northeastern isometric view of the device of this utility model;

[0024] Figure 5 yes Figure 1 Cross-sectional view at point A (valve structure in closed state);

[0025] Figure 6 yes Figure 1 Cross-sectional view at point A (valve structure in open state).

[0026] Explanation of icon numbers:

[0027] 1-Frame; 101-Top beam; 102-Side support; 103-Foot support; 104-Socket; 105-Second alignment line;

[0028] 2-Glass tube; 201-Connecting tube; 202-Lower glass tube; 203-Perforation;

[0029] 3-Digestion tube;

[0030] 4-Pipe rack; 401-Side plate; 402-First alignment line;

[0031] 5-Shielding glass;

[0032] 6-Rotating pin; 601-Outlet hole; 602-Knob;

[0033] 7-Addition funnel;

[0034] 8-Acid recovery tank; 801-Overflow pipe.

[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0037] This application discloses an acid addition device for digesting laboratory samples (such as food, soil, air filter membranes, etc.). Figures 1-4As shown, the device includes a gantry frame 1, multiple vertically arranged and horizontally aligned glass tubes 2 mounted on the frame 1, multiple digestion tubes 3, and a tube rack 4 for vertically placing the digestion tubes 3. The frame 1 includes a top beam 101, side supports 102 below both ends of the top beam 101, and foot supports 103 connected to the bottom of the side supports 102. As shown in the diagram, the top of the glass tubes 2 is connected to the bottom of the top beam 101. The glass tubes 2 are evenly spaced and arranged in a straight line. A protective shielding glass 5 is provided on the frame 1 on both the front and rear sides of the glass tubes 2. When acid is added, the digestion tubes 3 are located directly below the glass tubes 2. For example, the tube rack is a 3-row × 10-hole rack, meaning each row can hold 10 digestion tubes, for a total of 30 digestion tubes. Acid is added sequentially by pushing the tube rack.

[0038] In this embodiment, there are 10 glass tubes, which correspond to the number and position of the single-row digestion tubes on the tube rack. The number of glass tubes and the specifications of the tube rack can be modularly increased or decreased according to actual needs, so there is no strict limit on the number. Each glass tube is marked with graduations (e.g., 5ml, 10ml, 15ml, 20ml, 25ml, etc.), and adjacent glass tubes 2 are connected by a connecting tube 201 on the top side. Each glass tube 2 has a glass lower tube 202 at its bottom end, which has a valve structure to control the flow of acid. The bottom end of the glass lower tube 202 has an inclined outlet. The inclined outlet structure reduces acid turbulence, making the acid flow more stable and reducing bubbles and splashing. Furthermore, the digestion tube 3 is located directly below the inclined outlet. When the valve structure is opened, the acid automatically flows out from the inclined outlet under gravity and enters the corresponding digestion tube 3 below.

[0039] Combination Figure 5 and Figure 6 As shown, the valve structure includes transverse through holes on the sides of each glass lower tube 202, which communicate with the internal cavity of the glass lower tube 202. A rotating pin 6 is inserted into each through hole, and an outlet hole 601 is also provided on the rotating pin 6 located in each through hole. To facilitate the operation of the rotating pin 6, one end of the rotating pin 6 extends outward through a side support 102, and a knob 602 is provided at this end of the rotating pin 6. By rotating the knob 602, the rotating pin 6 is driven to realize the closing and opening of the valve structure. When the valve structure is closed, as shown... Figure 5 As shown, at this time, the outflow holes 601 on the rotating pin 6 are disconnected from the internal cavity of the corresponding lower glass tube 202, so the acid solution cannot flow out from the inclined outlet at the lower end into the digestion tube 3; when the valve structure is opened, as Figure 6 As shown, at this time, each outflow hole 601 on the rotating pin 6 is in communication with the internal cavity of the corresponding glass lower tube 202, and the acid solution is added into the digestion tube 3 through the outflow hole 601 and the inclined outlet.

[0040] As an example, an acid-adding port is provided at the top of any glass tube 2 (the rightmost glass tube in the figure). An insertion hole 104 is provided on the top beam 101 corresponding to the acid-adding port. A liquid-adding funnel 7 is inserted into the insertion hole 104. The bottom end of the liquid-adding funnel 7 is connected to the acid-adding port. Therefore, acid is added to each glass tube 2 in advance for use through the liquid-adding funnel 7, the acid-adding port and each connecting tube 201.

[0041] To prevent waste and environmental pollution caused by adding excessive acid, such as Figure 3 As shown, an acid recovery tank 8 is provided outside one side support 102. An overflow pipe 801 is connected to the top of the acid recovery tank 8. The overflow pipe 801 passes through the side support 102 and is connected to the top side of the glass tube 2 inside the side support 102. When each glass tube 2 is filled with acid, the excess acid will enter the acid recovery tank 8 through the overflow pipe 801 for storage. The acid is collected, treated or reused through the drain pipe and drain valve at the bottom of the acid recovery tank 8. The drain valve is selected from acid corrosion resistant fluoropolymer-lined valves, high alloy stainless steel valves or ceramic ball valves.

[0042] The working principle of this acid addition device is as follows: First, acid (such as nitric acid, hydrochloric acid, a mixture of nitric acid and perchloric acid, or a mixture of nitric acid and hydrochloric acid) is added to each glass tube 2 through the addition funnel 7, the acid inlet, and the connecting pipe 201. During this process, the acid first flows into the first glass tube 2, and after it is full, it automatically flows into the second glass tube 2, and so on, filling each glass tube 2 in sequence. If there is excess acid, it automatically flows into the acid recovery tank 8 below through the overflow pipe 801. The digestion tube 3 containing the sample is placed on the tube rack 4, and the tube rack 4 is pushed horizontally so that the digestion tube 3 is moved directly below the glass lower tube 202. The rotating pin 6 is rotated, and acid will flow down from the inclined outlets of the 10 glass lower tubes 202 at the same time. At this time, the liquid level scale of the glass tube 2 is observed, and the valve structure is closed in time. In this way, the acid for 10 samples can be added at one time. Then, the tube rack 4 is pushed inward to add acid for the other two rows of 10 digestion tubes 3.

[0043] The acid addition device in this embodiment has the advantage of efficient batch operation. Through the modular design of horizontal glass tubes (10 tubes / row) and tube rack (3 rows × 10 holes), it can achieve simultaneous addition of 10 tubes at a time and continuous operation of 30 tubes. The multi-channel interconnection structure allows the acid to be "filled once and shared by multiple tubes". Combined with the rotary pin linkage valve control, the operating efficiency is significantly improved compared with the traditional single tube dispensing, which is especially suitable for the pretreatment needs of large batches of samples.

[0044] It is worth noting that in this embodiment, to facilitate the positioning and liquid addition of the digestion tube 3, the tube frame 4 includes side plates 401 on both sides. When the tube frame 4 is pushed, the side plates 401 on both sides of the tube frame 4 abut against the inner sides of the side supports 102 and foot supports 103 of the frame 1, thereby ensuring that the tube frame 4 does not shift when pushed horizontally. In addition, three first alignment lines 402 are provided on the top of the side plates 401 on both sides of the tube frame 4, and the three first alignment lines 402 correspond to the three rows of digestion tubes 3 on the tube frame 4 respectively. A second alignment line 105 is provided on the inner side of the side supports 102 on both sides of the frame 1, and the second alignment line 105 corresponds to the lower glass tube 202. When the first alignment line 402 and the second alignment line 105 are aligned, it can be determined that the digestion tube 3 is exactly below the lower glass tube 202. Therefore, the above implementation method facilitates the positioning of the digestion tube, saving time and effort.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indication will also change accordingly. In this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction relationship between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. In addition, the descriptions involving "first," "second," etc. in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. The technical solutions of the various embodiments can be combined with each other, but must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0046] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 laboratory rapid acid addition device, characterized in that, Includes the following structure: frame; Multiple glass tubes are used to hold acid solution, and each glass tube has an acid inlet at its top. The multiple glass tubes are placed vertically and arranged horizontally on the top of the frame. Adjacent glass tubes are connected by a connecting tube provided on the side of the top. Each glass tube has a lower glass tube at its bottom end, and the lower glass tube has a valve structure to control the flow of acid solution. Multiple digestion tubes are located directly below the lower glass tube and correspond one-to-one with the glass tube; The tube rack is used to vertically place multiple digestion tubes, and the lower glass tube is aligned with the digestion tube by pushing the tube rack.

2. The laboratory rapid acid addition device according to claim 1, characterized in that, The valve structure includes transverse perforations on the side of each glass lower tube, the perforations being connected to the internal cavity of the glass lower tube, a rotating pin being inserted into each perforation, an outflow hole being provided on the rotating pin located in each perforation, and a knob being provided at the outer end of the rotating pin. By rotating the knob, the rotating pin is driven to realize the closing and opening of the valve structure.

3. The laboratory rapid acid addition device according to claim 1, characterized in that, The bottom end of the glass tube has an oblique outlet structure.

4. The laboratory rapid acid addition device according to claim 1, characterized in that, The tube rack is a rack with 3 rows and 10 holes, and each row of the tube rack can hold 10 digestion tubes.

5. The laboratory rapid acid addition device according to claim 1 or 4, characterized in that, The frame includes a top beam, side supports below both ends of the top beam, and foot supports connected to the bottom of the side supports. The top of the glass tube is connected to the bottom of the top beam.

6. The laboratory rapid acid addition device according to claim 5, characterized in that, An insertion hole is provided on the top beam corresponding to the acid inlet, and a liquid addition funnel is inserted into the insertion hole.

7. The laboratory rapid acid addition device according to claim 5, characterized in that, The tube rack includes two side plates. When the tube rack is pushed, the two side plates of the tube rack abut against the inner sides of the frame side supports and foot supports.

8. The laboratory rapid acid addition device according to claim 7, characterized in that, Three first alignment lines are provided on the top of the side plates on both sides of the tube rack. The three first alignment lines correspond to the three rows of digestion tubes of the tube rack. A second alignment line is provided on the inner side of the side support on both sides. The second alignment line corresponds to the lower glass tube.

9. The laboratory rapid acid addition device according to claim 5, characterized in that, An acid recovery tank is provided outside one of the side supports. An overflow pipe is connected to the top of the acid recovery tank. The overflow pipe is connected to the top side of a glass tube. A drain pipe and a drain valve are provided at the bottom of the acid recovery tank.

10. The laboratory rapid acid addition device according to claim 1, characterized in that, A protective shielding glass is installed on the frame on both the front and rear sides of the glass tube.

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