Portable chemical experiment reagent quantitative taking device

Abstract

The utility model discloses a portable quantitative taking device for chemical experiment reagents. The portable quantitative taking device comprises a liquid taking needle tube, a mounting seat, an exhaust needle tube and a quantitative rod, a mounting frame is slidably arranged on the mounting seat, a fixing plate is horizontally arranged in the mounting frame, an exhaust needle tube and a liquid taking needle tube are arranged on the fixing plate, a quantifying rod is slidably arranged on the fixing plate in a limiting manner, and the upper end of the quantifying rod is connected with a piston push handle of the liquid taking needle tube; a connector is installed at a needle opening of the liquid taking needle tube, a liquid outlet, a liquid taking opening and an exhaust opening are formed in the connector, a first one-way valve and a switch valve are installed in the liquid outlet and the exhaust opening respectively, the exhaust opening is communicated with the exhaust needle tube through a hose, the liquid taking opening is connected with a liquid taking hose, and an inlet of the liquid taking hose is arranged in a reagent bottle. And a second one-way valve is arranged at the inlet. According to the utility model, liquid can be filled between the liquid taking hose and the connector before sampling, air errors can be eliminated, and the liquid taking needle tube is quantitatively pulled out for sampling through the quantitative rod, so that the same metering is ensured during sampling every time.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical experiment equipment, in particular to a convenient quantitative chemical experiment reagent dispenser. Background Art

[0002] Accurately taking a certain amount of reagents in chemical experiments is crucial to the accuracy of experimental results. Traditional methods of taking reagents include using tools such as measuring cylinders and pipettes. However, during the operation of these tools, the amount of reagents to be taken depends entirely on personal visual observation of the scale, which is prone to errors. Therefore, a more quantitative and accurate reagent dispenser is needed.

[0003] In the prior art, the utility model patent with patent number CN202222691201.3 discloses a quantitative dispenser for nucleic acid extraction reagent, comprising a base plate and a vertical rod, wherein the vertical rod is fixedly arranged in the middle of the upper surface of the base plate, a transparent syringe is fixedly arranged on the upper end of the vertical rod, a piston is slidably arranged inside the transparent syringe, a piston rod is fixedly arranged on one side of the piston, one end of the piston rod extends to the outside of the transparent syringe, a liquid outlet tube is fixedly arranged on the end of the transparent syringe away from the piston rod, a liquid inlet tube is fixedly arranged on the upper surface of the end of the transparent syringe away from the piston rod, a placement ring is arranged on the outside of the vertical rod, a plurality of placement holes are opened on the surface of the placement ring, and a horizontal plate is fixedly arranged in the middle of the placement ring.

[0004] The above patent provides a device for quantitatively taking reagents during experiments. The device sets the liquid inlet tube in the reagent bottle, and there is no need to reciprocate the sampling device into the reagent bottle. Reagents are added to different test tubes in turn by rotating the placement ring, which is easy to use. However, the device uses a liquid sampling needle to quantitatively sample, and the operator needs to observe the scale to determine the amount taken. There are errors in naked eye observation, and it cannot guarantee that the sampling amount is completely consistent each time. At the same time, there is air in the liquid inlet and outlet tubes of the device during the liquid taking process. The needle will suck air into the needle during the liquid taking process, resulting in a small actual amount taken. Further improvement is needed. Utility Model Content

[0005] The purpose of the utility model is to provide a convenient quantitative chemical experiment reagent dispenser, aiming to improve the existing reagent dispenser, which needs to observe the amount of reagent taken by naked eyes when sampling, and cannot guarantee that the sampling amount is completely consistent each time. At the same time, the air in the pipeline cannot be discharged during the sampling process, resulting in the problem that the actual amount of reagent taken is less than the prescribed amount.

[0006] The utility model is achieved in this way:

[0007] A portable quantitative chemical experiment reagent dispenser comprises a liquid collection needle tube, a mounting seat, an exhaust needle tube and a quantitative rod; a mounting frame is slidably arranged on the mounting seat, a fixed plate is horizontally arranged in the mounting frame, an exhaust needle tube and a liquid collection needle tube are arranged on the fixed plate, a quantitative rod is slidably and limitedly arranged on the fixed plate, and the upper end of the quantitative rod is connected to the piston push handle of the liquid collection needle tube; a connector is installed at the needle mouth of the liquid collection needle tube, a liquid outlet, a liquid collection port and an exhaust port are respectively arranged on the connector, a first one-way valve and a switch valve are respectively installed in the liquid outlet and the exhaust port, the exhaust port is connected to the exhaust needle tube through a hose, the liquid collection port is connected to a liquid collection hose, the inlet of the liquid collection hose is arranged in a reagent bottle, and a second one-way valve is arranged at the inlet.

[0008] Preferably, the mounting seat comprises a mounting seat and a column, the column is fixedly arranged on the upper end surface of the mounting seat, and the mounting frame is slidably arranged on the column.

[0009] Preferably, the mounting frame includes a mounting sleeve, the mounting sleeve is provided with a first locking bolt, the mounting sleeve is slidably mounted on the column, the first locking bolt passes through the mounting sleeve and abuts against the surface of the column, and a fixing plate is fixedly provided on the side of the mounting sleeve.

[0010] Preferably, the fixing plate is respectively provided with a first mounting hole and a second mounting hole, the exhaust needle tube is installed in the first mounting hole, and the liquid collection needle tube is installed in the second mounting hole.

[0011] Preferably, the quantitative rod includes a scale rod and a limit sleeve, the scale rod is slidably set on the fixed plate and is located on the side of the liquid collection needle tube, the upper end of the scale rod is fixedly connected to the piston push handle of the liquid collection needle tube, and the limit sleeve is adjustably set on the rod body of the scale rod located below the fixed plate.

[0012] Preferably, the limiting sleeve comprises a second locking bolt, and the limiting sleeve is movably provided with the second locking bolt, and the second locking bolt passes through the limiting sleeve and abuts against the scale rod.

[0013] Preferably, the connector further comprises a mounting port, the mounting port is mounted on the liquid collection needle tube, the liquid outlet is located at the lower end of the connector, and the liquid collection port and the exhaust port are arranged on the side of the connector relatively to each other.

[0014] Preferably, the first one-way valve flows in the direction of its corresponding outlet, and the second one-way valve flows in the direction of the connecting head.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model uses a plurality of structures, including an exhaust needle tube, a connector, a first one-way valve, a switch valve, and a second one-way valve, to cooperate with each other, so that the space between the liquid collection hose and the connector can be filled with liquid before sampling, thereby eliminating air errors, and then the liquid collection needle tube is quantitatively pulled out through a quantitative rod for sampling, thereby ensuring that each sampling is of the same quantity.

[0017] 2. The utility model can adjust the height of the device according to the size of the reagent bottle by slidingly arranging the mounting frame on the mounting seat, so that it is convenient to be applicable to sampling of reagent bottles of various sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front structural schematic diagram of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the mounting seat of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the mounting frame of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the quantitative rod of the utility model;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the connector of the utility model.

[0023] In the figure: 1. mounting base; 101. base; 102. column; 2. mounting frame; 201. mounting sleeve; 202. first locking bolt; 203. fixing plate; 204. first mounting hole; 205. second mounting hole; 3. exhaust needle tube; 4. liquid collection needle tube; 5. quantitative rod; 501. scale rod; 502. limit sleeve; 503. second locking bolt; 6. connector; 601. mounting port; 602. liquid outlet; 603. liquid collection port; 604. exhaust port; 605. first one-way valve; 606. switch valve; 7. liquid collection hose; 701. second one-way valve. DETAILED DESCRIPTION

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; 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 elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The following is a further description with reference to the accompanying drawings and specific embodiments: Example 1

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the portable chemical experiment reagent quantitative dispenser includes a liquid collection needle tube 4, a mounting seat 1, an exhaust needle tube 3 and a quantitative rod 5. A mounting frame 2 is slidably mounted on the mounting seat 1. By sliding the mounting frame 2 on the mounting seat 1, the height of the mounting frame 2 can be adjusted, so that the device can be conveniently used for reagent bottles of different sizes; the mounting seat 1 includes a base 101 and a column 102. The column 102 is fixedly mounted on the upper end surface of the base 101. The mounting frame 2 is slidably mounted on the column 102. The mounting frame 2 includes a mounting sleeve 201. The mounting sleeve 201 is provided with a first locking bolt 202. The mounting sleeve 201 is slidably mounted on the column 102. The first locking bolt 202 penetrates the mounting sleeve 201. The mounting sleeve 201 abuts against the surface of the column 102. By setting a first locking bolt 202, the mounting frame 2 can be conveniently locked in a limited position to prevent it from automatically sliding down. A fixing plate 203 is fixedly provided on the side of the mounting sleeve 201. A fixing plate 203 is horizontally provided in the mounting frame 2. An exhaust needle tube 3 and a liquid collection needle tube 4 are provided on the fixing plate 203. A first mounting hole 204 and a second mounting hole 205 are respectively opened on the fixing plate 203. The exhaust needle tube 3 is installed in the first mounting hole 204, and the liquid collection needle tube 4 is installed in the second mounting hole 205.

[0027] like Figure 4 As shown, a quantitative rod 5 is slidably and position-limitedly provided on the fixed plate 203 , and the upper end of the quantitative rod 5 is connected to the piston push handle of the liquid collection needle tube 4 . The quantitative rod 5 includes a scale rod 501 and a limiting sleeve 502. The scale rod 501 is slidably arranged on the fixed plate 203 and is located on the side of the liquid collection needle tube 4. The upper end of the scale rod 501 is fixedly connected to the piston push handle of the liquid collection needle tube 4. The limiting sleeve 502 is adjustably arranged on the rod body of the scale rod 501 located below the fixed plate 203. By adjusting the position of the limiting sleeve 502 on the scale rod 501, the height of the reagent sucked by the liquid collection needle tube 4 can be controlled, thereby realizing quantitative reagent extraction, and ensuring that the measurement of multiple reagent extractions is fixed. The limiting sleeve 502 includes a second locking bolt 503, and the second locking bolt 503 is movably arranged on the limiting sleeve 502. The second locking bolt 503 penetrates the limiting sleeve 502 and abuts against the scale rod 501. By setting the second locking bolt 503, it is convenient to limit and lock the limiting sleeve 502 to prevent it from automatically sliding down.

[0028] like Figure 5As shown, a connector 6 is installed at the needle mouth of the liquid collection needle tube 4, and a liquid outlet 602, a liquid collection port 603 and an exhaust port 604 are respectively arranged on the connector 6. The connector 6 also includes a mounting port 601, which is mounted on the liquid collection needle tube 4. The liquid outlet 602 is located at the lower end of the connector 6, and the liquid collection port 603 and the exhaust port 604 are relatively arranged on the side of the connector 6. A first non-return valve 605 and a switch valve 606 are respectively installed in the liquid outlet 602 and the exhaust port 604. The exhaust port 604 is connected to the exhaust needle tube 3 through a hose. The liquid collection port 603 is connected to a liquid collection hose 7. The inlet of the liquid collection hose 7 is arranged in a reagent bottle, and a second non-return valve 701 is arranged at the inlet. The first non-return valve 605 flows in the direction of its corresponding outlet, and the second non-return valve 701 flows in the direction of the connector 6. By arranging the exhaust needle tube 3, before taking reagent samples, the switch valve 605 is opened. Close valve 606 and pull the exhaust needle tube 3 to allow the reagent to enter the connector 6 through the liquid collection hose 7 and then enter the exhaust needle tube 3 through the exhaust port 604. The air between the liquid collection hose 7 and the connector 6 can be completely removed by the reagent. Then close the switch valve 606 and use the first one-way valve 605, the switch valve 606 and the second one-way valve 701 to fill the liquid collection hose 7 and the connector 6 and prevent it from flowing out automatically, so that the liquid collection needle tube 4 can take samples and ensure the accuracy of sampling and measurement. Example 2

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, the portable chemical experiment reagent quantitative dispenser includes a liquid collection needle tube 4, a mounting seat 1, an exhaust needle tube 3 and a quantitative rod 5. A mounting frame 2 is slidably arranged on the mounting seat 1, and the mounting seat 1 includes a base 101 and a column 102. The column 102 is fixedly arranged on the upper end surface of the base 101, and the mounting frame 2 is slidably arranged on the column 102. The mounting frame 2 includes a mounting sleeve 201, and a first locking bolt 202 is arranged on the mounting sleeve 201. The mounting sleeve 201 is slidably sleeved on the column 102, and the first locking bolt 202 penetrates the mounting sleeve 201 and abuts against the surface of the column 102. A fixing plate 203 is fixedly arranged on the side of the mounting sleeve 201, and a fixing plate 203 is horizontally arranged in the mounting frame 2, and an exhaust needle tube 3 and a liquid collection needle tube 4 are arranged on the fixing plate 203. A first mounting hole 204 and a second mounting hole 205 are respectively opened on the fixing plate 203, and the exhaust needle tube 3 is installed in the first mounting hole 204, and the liquid collection needle tube 4 is installed in the second mounting hole 205.

[0030] like Figure 4As shown, a quantitative rod 5 is slidably and position-limitedly arranged on the fixed plate 203, and the upper end of the quantitative rod 5 is connected to the piston push handle of the liquid collection needle tube 4. The quantitative rod 5 includes a scale rod 501 and a limit sleeve 502. The scale rod 501 is slidably arranged on the fixed plate 203 and is located beside the liquid collection needle tube 4. The upper end of the scale rod 501 is fixedly connected to the piston push handle of the liquid collection needle tube 4. The limit sleeve 502 is adjustably arranged on the rod body of the scale rod 501 located below the fixed plate 203. The limit sleeve 502 includes a second locking bolt 503. The second locking bolt 503 is movably arranged on the limit sleeve 502. The second locking bolt 503 penetrates the limit sleeve 502 and abuts on the scale rod 501.

[0031] like Figure 5 As shown, a connector 6 is installed at the needle port of the liquid collection needle tube 4, and a liquid outlet 602, a liquid collection port 603 and an exhaust port 604 are respectively arranged on the connector 6. The connector 6 also includes a mounting port 601, which is mounted on the liquid collection needle tube 4. The liquid outlet 602 is located at the lower end of the connector 6, and the liquid collection port 603 and the exhaust port 604 are relatively arranged on the side of the connector 6. A first check valve 605 and a switch valve 606 are respectively installed in the liquid outlet 602 and the exhaust port 604, and the exhaust port 604 is connected to the exhaust needle tube 3 through a hose. The liquid collection port 603 is connected to a liquid collection hose 7, and the inlet of the liquid collection hose 7 is arranged in a reagent bottle, and a second check valve 701 is arranged at the inlet. The flow directions of the first check valve 605 and the switch valve 606 are both toward their corresponding outlet directions, and the flow direction of the second check valve 701 is toward the direction of the connector 6.

[0032] The working principle of the utility model is as follows: before sampling, the height of the mounting frame 2 on the column 102 is adjusted to make the device convenient for sampling, and then it is fixed by the first locking bolt 202, and then the limiting sleeve 502 on the quantitative rod 5 is adjusted to a suitable scale position according to the required measurement; then the switch valve 606 is opened, and then the exhaust needle tube 3 is pulled until the liquid collection hose 7 and the connecting head 6 are filled with reagents, and finally the switch valve 606 is closed to prevent part of the reagent from flowing to the exhaust needle tube 3 during the operation of the liquid collection needle tube 4, and a certain amount of reagent is taken out through the liquid collection needle tube 4 and discharged into the test tube through the liquid outlet 602, thereby completing quantitative sampling.

[0033] In summary, the utility model uses the exhaust needle tube 3, the connecting head 6, the first one-way valve 605, the switch valve 606 and the second one-way valve 701 to cooperate with each other. The liquid can be filled between the liquid collection hose 7 and the connecting head 6 before sampling, and air errors can be eliminated. Then, the liquid collection needle tube 4 is pulled out quantitatively through the quantitative rod 5 for sampling, which can ensure that the same measurement is taken each time. By sliding the mounting frame 2 on the mounting seat 1, the height of the device can be conveniently adjusted according to the size of the reagent bottle, which is convenient for sampling reagent bottles of various sizes.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A portable chemical experiment reagent quantitative dispenser, comprising a liquid collection needle tube (4), characterized in that: The device also comprises a mounting seat (1), an exhaust needle tube (3) and a quantitative rod (5); a mounting frame (2) is slidably mounted on the mounting seat (1); a fixing plate (203) is horizontally mounted in the mounting frame (2); an exhaust needle tube (3) and a liquid collection needle tube (4) are mounted on the fixing plate (203); a quantitative rod (5) is slidably mounted and limited on the fixing plate (203); the upper end of the quantitative rod (5) is connected to a piston push handle of the liquid collection needle tube (4); a connector (6) is mounted at the needle port of the liquid collection needle tube (4); ), the connector (6) is respectively provided with a liquid outlet (602), a liquid collection port (603) and an exhaust port (604); a first one-way valve (605) and a switch valve (606) are respectively installed in the liquid outlet (602) and the exhaust port (604); the exhaust port (604) is connected to an exhaust needle tube (3) via a hose; the liquid collection port (603) is connected to a liquid collection hose (7); the inlet of the liquid collection hose (7) is provided in a reagent bottle, and a second one-way valve (701) is provided at the inlet.

2. The portable chemical experiment reagent quantitative dispenser according to claim 1, characterized in that: The mounting seat (1) comprises a base (101) and a column (102), wherein the column (102) is fixedly arranged on the upper end surface of the base (101), and the mounting frame (2) is slidably arranged on the column (102).

3. The portable chemical experiment reagent quantitative dispenser according to claim 2, characterized in that: The mounting frame (2) comprises a mounting sleeve (201), a first locking bolt (202) being arranged on the mounting sleeve (201), the mounting sleeve (201) being slidably mounted on the column (102), the first locking bolt (202) passing through the mounting sleeve (201) and abutting against the surface of the column (102), and a fixing plate (203) being fixedly arranged on the side of the mounting sleeve (201).

4. The portable chemical experiment reagent quantitative dispenser according to claim 1, characterized in that: The fixing plate (203) is provided with a first mounting hole (204) and a second mounting hole (205), respectively; the exhaust needle tube (3) is mounted in the first mounting hole (204), and the liquid collection needle tube (4) is mounted in the second mounting hole (205).

5. The portable chemical experiment reagent quantitative dispenser according to claim 1, characterized in that: The quantitative rod (5) comprises a scale rod (501) and a limiting sleeve (502); the scale rod (501) is slidably arranged on the fixed plate (203) and is located beside the liquid collection needle tube (4); the upper end of the scale rod (501) is fixedly connected to the piston push handle of the liquid collection needle tube (4); and the limiting sleeve (502) is adjustably arranged on the rod body of the scale rod (501) located below the fixed plate (203).

6. The portable chemical experiment reagent quantitative dispenser according to claim 5, characterized in that: The limiting sleeve (502) comprises a second locking bolt (503), and the limiting sleeve (502) is movably provided with the second locking bolt (503). The second locking bolt (503) passes through the limiting sleeve (502) and abuts against the scale rod (501).

7. The portable chemical experiment reagent quantitative dispenser according to claim 1, characterized in that: The connector (6) further comprises a mounting port (601), wherein the mounting port (601) is mounted on the liquid collection needle tube (4), the liquid outlet (602) is located at the lower end of the connector (6), and the liquid collection port (603) and the exhaust port (604) are arranged on the side of the connector (6) relative to each other.

8. The portable chemical experiment reagent quantitative dispenser according to claim 1, characterized in that: The flow direction of the first one-way valve (605) is towards its corresponding outlet direction, and the flow direction of the second one-way valve (701) is towards the direction of the connecting head (6).

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