Nitrogen blowing concentrator

Abstract

The utility model relates to the technical field of nitrogen blowing instruments, and discloses a nitrogen blowing instrument which comprises a base, a placement groove is formed in the base, an electric heating plate is fixedly connected to the lower end of the placement groove, a mounting frame is fixedly connected to the interior of the placement groove, and a plurality of placement blocks are fixedly connected to the interior of the mounting frame. And placing holes are formed in the multiple placing blocks in a penetrating manner. According to the nitrogen blowing instrument, the clamping blocks are slidably arranged in the convex grooves and abut against the springs, when the nitrogen blowing instrument is used, the test tubes are inserted into the placement holes and then make contact with the clamping blocks, the bottoms of the test tubes push the clamping blocks to move towards the interiors of the convex grooves, then the springs are driven to be compressed, and meanwhile the springs apply force to the clamping blocks in the direction of the test tubes while being compressed; the stability of the test tube in the use process is kept, so that the test tube insertion device is suitable for insertion of test tubes of different specifications, and the application range is widened.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of nitrogen blowing instruments, in particular to a nitrogen blowing instrument. BACKGROUND

[0002] The nitrogen blowing instrument is used for sample preparation in liquid phase, gas phase and mass spectrometric analysis. Since nitrogen is an inert gas, it can prevent oxidation by isolating oxygen. The nitrogen blowing instrument blows nitrogen to the surface of a heated sample rapidly, continuously and controllably, realizes rapid concentration of a large amount of sample, has the characteristics of time saving, convenient operation and easy control, and can quickly obtain expected results. Therefore, the nitrogen blowing instrument is widely used in the fields of pesticide residue analysis, commodity inspection, food, environment, pharmaceuticals and biological products.

[0003] The existing patent (publication number: CN214010872U) discloses a nitrogen blowing instrument which comprises a base, a support frame, a blowing device and a water storage device. The lower end of the support frame is fixed to the base, the blowing device is installed on the support frame, the base is hollow, a sample seat hole is formed in the upper end of the base, the sample seat hole is opposite to the blowing device, a heating plate is arranged in the base and located directly below the sample seat hole. A water inlet is arranged on the base. The water storage device comprises a water storage cylinder, a connecting pipe and a negative pressure assembly. The water storage cylinder is communicated with the base through the connecting pipe, and the negative pressure assembly is installed in the water storage cylinder. When the water bath heating is converted into dry heating, the negative pressure assembly can suck the hot water in the base into the water storage cylinder. When the water bath heating needs to be used again, the negative pressure assembly can push the hot water in the water storage cylinder into the base, so that the water does not need to be heated again every time, the working efficiency of the nitrogen blowing instrument is improved, and the energy saving effect is achieved.

[0004] The diameter of the sample seat hole in the nitrogen blowing instrument disclosed in the above-mentioned patent is fixed, and only a test tube with one size can be inserted for use. In actual application, the sample to be treated has various specifications, and the fixed size of the test tube limits the processing capacity of the device for different samples, so that the scope of application is small, and all experimental requirements cannot be met. Practical new type content

[0005] In view of the defects of the prior art, the nitrogen blowing instrument has the advantages of wider application range, solves the problem that the diameter of the sample seat hole in the nitrogen blowing instrument is fixed, only a test tube with one size can be inserted for use, in actual application, the sample to be treated has various specifications, and the fixed size of the test tube limits the processing capacity of the device for different samples, so that the scope of application is small, and all experimental requirements cannot be met.

[0006] To achieve the above object, the application provides the following technical scheme: a nitrogen blowing instrument, comprising a base, a placing groove is formed in the base, an electric heating plate is fixedly connected to the lower end of the placing groove, a mounting frame is fixedly connected to the inside of the placing groove, a plurality of placing blocks are fixedly connected to the inside of the mounting frame, and a placing hole is formed in each of the plurality of placing blocks.

[0007] Four convex grooves are formed in the inside of each placing block in a mirror image array, bolts are threadedly connected to the two sides of the convex grooves, a stop block is slidably sleeved on one end of the two bolts, a positioning column is fixedly connected to the middle of one side of the stop block, a spring is slidably sleeved on the surface of the positioning column, a clamping block is slidably connected to the inside of the convex groove, the surface of one side of the clamping block is in abutment with the end of the spring away from the stop block, and the end of the clamping block extends into the inside of the placing hole.

[0008] Through the above scheme, the clamping block is slidably arranged in the convex groove, and the clamping block is in abutment with the spring. When in use, after the test tube is inserted into the inside of the placing hole, the test tube will be in contact with the clamping block, the bottom of the test tube will push the clamping block to move into the inside of the convex groove, thereby driving the spring to be compressed, and at the same time, the spring will exert a force on the clamping block in the direction of the test tube, so that the clamping block clamps the test tube, keeps the test tube stable during use, and is suitable for inserting and placing test tubes of different specifications, thereby increasing the applicable range.

[0009] Further, a clearance groove corresponding to the positioning column is formed in the inside of the placing hole, and the end of the positioning column extends into the inside of the clearance groove and is slidably connected with the inner wall of the clearance groove.

[0010] Through the cooperation of the positioning column and the clearance groove, the inclination of the spring during compression can be avoided, and the normal use is not affected.

[0011] Further, a support frame is fixedly connected to the surface of one side of the base, a threaded rod is rotatably connected to the upper end of the support frame, and a sliding block is threadedly sleeved on the upper end of the threaded rod.

[0012] Through the above scheme, the threaded rod is rotated during use, and the sliding block is driven to move.

[0013] Further, a guide column is fixedly connected to the two sides of the upper end of the base, and the sliding block is slidably connected with the two guide columns.

[0014] Through the above scheme, the guide columns are located on the two sides of the threaded rod, and the sliding block is slidably connected with the two guide columns, so as to ensure the stability and balance of the sliding block during movement.

[0015] Further, a baffle is fixedly connected to the upper ends of the two guide columns, a rotating handle is rotatably connected to the inside of the baffle, and the lower end of the rotating handle penetrates the baffle and is fixedly connected to the upper end of the threaded rod.

[0016] Through the above scheme, by manually rotating the rotating handle, the rotating handle will drive the threaded rod to move, thereby driving the sliding block to move smoothly along the guide column.

[0017] Further, the surface of the sliding block is fixedly connected with a mounting plate, and two reinforcing ribs are fixedly connected between the mounting plate and the sliding block.

[0018] Through the above scheme, the reinforcing ribs are arranged, thereby enhancing the connection strength between the sliding block and the mounting plate, and improving the stability and carrying capacity of the overall structure.

[0019] Further, a plurality of connecting pieces corresponding to the placement holes are fixedly connected inside the mounting plate, and a tracheal joint is threadedly connected to the upper end of each connecting piece.

[0020] Through the above scheme, the tracheal joint is tightly connected to the upper end of the connecting piece through the threaded connection mode, which is firm and convenient to disassemble and replace.

[0021] Further, the lower end of each connecting piece penetrates through the mounting plate and is fixedly connected with a ventilation needle.

[0022] Through the above scheme, the ventilation needle can accurately guide the nitrogen into the test tube through the tracheal joint and the connecting piece.

[0023] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0024] The nitrogen blowing instrument is provided with a clamping block inside the convex groove, and the clamping block abuts against the spring. When the test tube is inserted into the placement hole, the test tube will contact the clamping block, the bottom of the test tube will push the clamping block to move into the convex groove, thereby driving the spring to compress, and at the same time, the spring will exert a force on the clamping block in the direction of the test tube, so that the clamping block clamps the test tube, keeps the test tube stable during use, and is suitable for inserting different specifications of test tubes, thereby increasing the application range. At the same time, the precise control of the position of the ventilation needle can be realized by cooperation of the threaded rod and the sliding block, thereby further increasing the working precision. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0026] Figure 2 It is a schematic diagram of the rotating handle mounting structure of the present application;

[0027] Figure 3 It is a schematic diagram of the mounting plate mounting structure of the present application;

[0028] Figure 4 It is a sectional view of the spring mounting structure of the present application;

[0029] Figure 5 For Figure 3 The structure of A in the figure is enlarged.

[0030] In the figure:

[0031] 1, base; 2, placing groove; 3, electric heating plate; 4, mounting frame; 5, placing block; 6, convex groove; 7, bolt; 8, stop block; 9, positioning column; 10, spring; 11, clamping block; 12, let go of the slot; 13, support frame; 14, threaded rod; 15, guide column; 16, baffle; 17, rotating handle; 18, sliding block; 19, mounting plate; 20, connecting piece; 21, air pipe joint; 22, air needle; 23, placing hole; 24, reinforcing rib. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0033] Please refer to Figure 1 and Figure 4 , the nitrogen blowing instrument in the embodiment, including base 1, the inside of base 1 is provided with placing groove 2, the lower end of placing groove 2 is fixedly connected with electric heating plate 3, the inside of placing groove 2 is fixedly connected with mounting frame 4, the inside of mounting frame 4 is fixedly connected with a plurality of placing blocks 5, the inside of a plurality of placing blocks 5 is throughly provided with placing holes 23, four convex grooves 6 are arranged in mirror image array in the inside of placing block 5, the inside of placing block 5 is threadedly connected with bolts 7 on both sides of convex groove 6, two bolts 7 are commonly and slidably sleeved with stop block 8 at one end, the side of stop block 8 is fixedly connected with positioning column 9 in the middle, spring 10 is slidably sleeved with positioning column 9 on the surface, clamping block 11 is slidably connected in the inside of convex groove 6, the side surface of clamping block 11 is abutted with the end of spring 10 away from stop block 8, the one end of clamping block 11 extends into the inside of placing hole 23, the inside of placing hole 23 is provided with let go of the slot 12 corresponding to positioning column 9, the one end of positioning column 9 extends into the inside of let go of the slot 12 and is slidably connected with the inner wall of let go of the slot 12, through the cooperation of positioning column 9 and let go of the slot 12, the inclination in the process of compression of spring 10 can be avoided, the normal use is affected, after the test tube is inserted into the placing hole 23 of placing block 5, the bottom of test tube is in contact with clamping block 11 and pushes clamping block 11 to move to the inside of convex groove 6, the movement of clamping block 11 compresses spring 10, spring 10 exerts reverse force on clamping block 11 at the same time of compression, so that clamping block 11 tightly clamps test tube, the cooperation of positioning column 9 and let go of the slot 12 ensures that spring 10 will not be inclined in the process of compression, so as to ensure the stability and accuracy of clamping.

[0034] Please refer to Figure 2 and Figure 3 The base 1 is fixedly connected with a support frame 13 on one side surface, a threaded rod 14 is rotatably connected to the upper end of the support frame 13, a sliding block 18 is threadedly connected to the upper end of the threaded rod 14, and the threaded rod 14 drives the sliding block 18 to move when the threaded rod 14 is rotated. The upper end of the base 1 is fixedly connected with guide columns 15 on both sides of the threaded rod 14, and the sliding block 18 is slidably connected with the two guide columns 15. The guide columns 15 are located on both sides of the threaded rod 14, and the sliding block 18 is slidably connected with the two guide columns 15 to ensure the stability and balance of the sliding block 18 during movement. The upper end of the two guide columns 15 is fixedly connected with a baffle 16, and the baffle 16 is rotatably connected with a rotating handle 17. The lower end of the rotating handle 17 penetrates the baffle 16 and is fixedly connected with the upper end of the threaded rod 14. The rotating handle 17 drives the threaded rod 14 to move by rotating the rotating handle 17 manually, thereby driving the sliding block 18 to move smoothly along the guide column 15.

[0035] Please refer to Figure 3 and Figure 5 The surface of the sliding block 18 is fixedly connected with a mounting plate 19, and the mounting plate 19 is fixedly connected with two reinforcing ribs 24 between the sliding block 18. The reinforcing ribs 24 enhance the connection strength between the sliding block 18 and the mounting plate 19, improve the stability and carrying capacity of the overall structure, and are fixedly connected with a plurality of connecting pieces 20 corresponding to the placement holes 23 in the mounting plate 19. The upper end of each connecting piece 20 is threadedly connected with a gas pipe joint 21, and the gas pipe joint 21 is tightly connected with the upper end of the connecting piece 20 by thread connection. It is firm, easy to disassemble and replace, and the lower end of each connecting piece 20 penetrates the mounting plate 19 and is fixedly connected with a ventilation needle 22. The ventilation needle 22 can accurately guide nitrogen into the test tube through the gas pipe joint 21 and the connecting piece 20.

[0036] In this embodiment, the clamping block 11 is slidably arranged in the convex groove 6, and the clamping block 11 abuts between the spring 10. When the test tube is inserted into the placement hole 23, it will come into contact with the clamping block 11, and the bottom of the test tube will push the clamping block 11 to move into the convex groove 6, thereby driving the spring 10 to compress. At the same time, the spring 10 will exert a force on the clamping block 11 in the direction of the test tube during compression, so that the clamping block 11 clamps the test tube, maintains the stability of the test tube during use, and is suitable for inserting and placing test tubes of different specifications, thereby increasing the application range. At the same time, the precise control of the position of the ventilation needle 22 can be realized by cooperation of the threaded rod 14 and the sliding block 18, thereby further increasing the working precision.

[0037] The working principle of the above embodiment is as follows:

[0038] First select the appropriate test tube and insert into the hole 23, the test tube is inserted into the hole 23 of the placement block 5 process, the test tube bottom and clamp block 11 contact, and push the clamp block 11 to the convex groove 6 inside the move, the clamp block 11 compression of the spring 10, the spring 10 at the same time compression of the clamp block 11 exert a reverse force, so that the clamp block 11 tightly clamped test tube, connect the nitrogen source, ensure that the gas tube joint 21 and nitrogen source is closely connected, then turn the rotary handle 17, the rotary handle 17 rotation will drive the threaded rod 14 rotation, in turn through the sliding block 18 and mounting plate 19 drive the needle 22 move, the needle 22 inserted into the test tube, then open the gas source switch, nitrogen through the gas tube joint 21 into the connecting piece 20, and through the needle 22 into the test tube, need to heat, can open the power of the electric heating plate 3, and set the appropriate heating temperature.

[0039] If heating, can open the power of the electric heating plate 3, and set the appropriate heating temperature.

[0040] It should be noted that in this document, the terms "first", "second", and the like, are used merely as label to distinguish one entity or action from another, and do not necessarily require or imply any such actual relationship or order between such entities or actions. Moreover, the terms "include", "have", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements is not limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0041] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A nitrogen blowing device, including a base (1), characterized in that: The base (1) has a placement slot (2) inside, and an electric heating plate (3) is fixedly connected to the lower end of the placement slot (2). A mounting bracket (4) is fixedly connected inside the placement slot (2), and multiple placement blocks (5) are fixedly connected inside the mounting bracket (4). Each of the multiple placement blocks (5) has a through placement hole (23). The placement block (5) has four convex grooves (6) arranged in a mirror array inside. Bolts (7) are threadedly connected to both sides of the convex grooves (6) inside the placement block (5). A stop block (8) is slidably fitted on one end of two bolts (7). A positioning post (9) is fixedly connected to the middle of one side of the stop block (8). A spring (10) is slidably fitted on the surface of the positioning post (9). A clamping block (11) is slidably connected inside the convex groove (6). One side surface of the clamping block (11) abuts against the end of the spring (10) away from the stop block (8). One end of the clamping block (11) extends into the placement hole (23).

2. The nitrogen blowing device according to claim 1, characterized in that: The placement hole (23) has a relief groove (12) corresponding to the positioning post (9) inside. One end of the positioning post (9) extends into the relief groove (12) and slides in connection with the inner wall of the relief groove (12).

3. The nitrogen blowing device according to claim 1, characterized in that: A support frame (13) is fixedly connected to one side surface of the base (1), and a threaded rod (14) is rotatably connected to the upper end of the support frame (13). A sliding block (18) is threadedly sleeved on the upper end of the threaded rod (14).

4. The nitrogen blowing device according to claim 3, characterized in that: The upper end of the base (1) is fixedly connected to guide posts (15) on both sides of the threaded rod (14), and the sliding block (18) is slidably connected to the two guide posts (15).

5. The nitrogen blowing device according to claim 4, characterized in that: The upper ends of the two guide posts (15) are fixedly connected to a baffle (16), and a rotating handle (17) is rotatably connected inside the baffle (16). The lower end of the rotating handle (17) passes through the baffle (16) and is fixedly connected to the upper end of the threaded rod (14).

6. The nitrogen blowing device according to claim 3, characterized in that: The sliding block (18) is fixedly connected to a mounting plate (19), and two reinforcing ribs (24) are fixedly connected between the mounting plate (19) and the sliding block (18).

7. The nitrogen blowing device according to claim 6, characterized in that: The mounting plate (19) is internally fixedly connected with a plurality of connectors (20) corresponding to the placement holes (23), and the upper ends of the plurality of connectors (20) are threaded with air pipe connectors (21).

8. The nitrogen blowing device according to claim 7, characterized in that: The lower ends of the multiple connectors (20) all penetrate the mounting plate (19) and are fixedly connected to the vent needles (22).

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