Novel nitrogen blowing concentrator

Abstract

A novel nitrogen blowing instrument relates to the technical field of nitrogen blowing instruments and comprises an outer shell, a sample groove is formed in the outer shell, a sample holder is mounted at the upper end of the interior of the sample groove and is in sliding fit with the sample groove, a plurality of mounting grooves are formed in the sample holder in a rectangular array manner, and the mounting grooves are in sliding fit with the sample groove. A mounting groove is formed in the rear wall of the outer shell, clamping pieces are arranged on the two sides of the interior of the mounting groove and are of arc-shaped structures, springs are fixedly mounted between the outer sides of the clamping pieces and the mounting groove, a transmission cavity is formed in the rear wall of the outer shell, a threaded rod is rotatably mounted in the transmission cavity, and a sliding block is mounted outside the threaded rod; according to the scheme, the problems that sample tubes are inconvenient to place and the sample tubes cannot be flexibly adjusted according to the sample tubes with different diameters due to the fact that the sample frame is fixed in the device are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to nitrogen blowing instrument technical field, concretely is a new type nitrogen blowing instrument. BACKGROUND

[0002] Nitrogen blowing instrument, also known as nitrogen blowing dryer and nitrogen purging instrument, is a kind of instrument for preparing concentrated sample in liquid phase (HPLC), gas phase (GC) and mass spectrometry test. Nitrogen blowing instrument blows nitrogen into the surface of heated sample continuously and controllably, breaks the gas-liquid balance in the upper space of liquid, thereby accelerates the volatilization speed of liquid, and achieves the purpose of sample concentration. Nitrogen blowing instrument has the advantages of time saving and labor saving, convenient and flexible operation, fast concentration speed, high concentration accuracy and the like, and is widely used in the industries of pesticide residue analysis, commodity inspection, food, environment, pharmaceuticals and biological products, and is an ideal supporting equipment of solid phase extraction technology. With the continuous expansion of its application field, the market demand of nitrogen blowing instrument is increasing, and the industry shows good development prospect.

[0003] For example, the Chinese authorized patent "a nitrogen blowing instrument" with publication number CN212568187U includes a shell, a nitrogen blowing needle module, a sample holder, a driving module and a door body, an assembly cavity is defined in the shell, the upper side of the assembly cavity is open and the front side of the assembly cavity has an opening, the nitrogen blowing needle module is arranged in the assembly cavity, the nitrogen blowing needle module is communicated with the external nitrogen source to blow nitrogen into the assembly cavity, the sample holder is movably arranged in the assembly cavity, the driving module can cooperate with the sample holder to drive the sample holder to extend out of the shell from the opening, a filter absorption piece is matched on the upper side of the assembly cavity, the filter absorption piece can absorb volatile organic solvents, and the door body is arranged corresponding to the opening to close the opening. The nitrogen blowing instrument can avoid the diffusion of organic solvents to the outside of the nitrogen blowing instrument, thereby improving the use safety of the nitrogen blowing instrument.

[0004] Although the above-mentioned prior art can realize the extraction of sample solid phase, the sample holder is fixed in the device, which is inconvenient for placing sample tubes and cannot be flexibly adjusted according to sample tubes of different diameters, thus cannot meet the existing demand. Therefore, we propose a new type of nitrogen blowing instrument. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a new type of nitrogen blowing instrument to solve the problems of inconvenient placement of sample tubes and inability to flexibly adjust according to sample tubes of different diameters of the sample holder fixed in the device in the above background technology.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A novel nitrogen blowing instrument, including the shell body, the inside of shell body is provided with sample groove, the upper end of sample groove inside is installed with sample holder, and sample holder is with sample groove sliding cooperation, the inside of sample holder is rectangular array and is opened with a plurality of installation slot, both sides of installation slot inside are provided with the clamping piece, and the clamping piece is arc structure, the outside of clamping piece and installation slot are fixedly installed with spring, the rear wall of shell body is equipped with transmission cavity, the inside rotation of transmission cavity is installed with threaded rod, the outside of threaded rod is installed with sliding block, and sliding block is connected through thread with threaded rod, the rear end of sample holder is fixedly provided with side plate, and side plate is connected through connecting plate with sliding block, the lower end of threaded rod is provided with first motor, and first motor is fixed in the lower end of shell body rear wall.

[0007] Preferably, the upper end of the sample groove is provided with an upper cover, and the rear end of the upper cover is connected with the shell body through a rotating shaft, both sides of the inside of the upper cover are fixedly provided with a fixed frame, a gas supply branch pipe is installed between the two fixed frames, and the gas supply branch pipe is rotatably connected with the fixed frame through a bearing, a plurality of gas nozzles are arranged at the bottom of the gas supply branch pipe, the outside of one side of the fixed frame is provided with a gas supply main pipe, and the gas supply main pipe is connected with the gas supply branch pipe through a connecting pipe, and a flow regulating valve is installed at one end of the gas supply branch pipe close to the gas supply main pipe.

[0008] Preferably, the upper end of the other side of the fixed frame is provided with an adjusting mechanism, a second motor is fixedly installed in the inside of the adjusting mechanism, a belt pulley is fixedly arranged on the output shaft of the second motor and the other end of the gas supply branch pipe, and the two belt pulleys are connected through a belt.

[0009] Preferably, the two sides of the rear end surface of the side plate are fixedly provided with guide blocks, and the guide blocks are slidingly limited with the shell body.

[0010] Preferably, an electric heating tube is installed at the bottom of the sample groove.

[0011] Preferably, a water level sensor is installed at one side of the inside of the sample groove, and a water level scale window is arranged at the front end of the shell body.

[0012] Preferably, a control panel is arranged at one side of the upper end surface of the shell body.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. The utility model discloses a sample holder lifting adjusting mechanism is equipped with, through the first motor of opening, its output shaft drives screw rod positive rotation, under the friction of its outer thread and the internal screw hole of sliding block, the rotary motion is converted into linear motion, to drive the sample holder to lift through the connecting plate and side plate, until located the upper portion of shell body end face, at this moment, the user can conveniently place the sample tube in the installation groove, after installation, the first motor reverses, drives the sample holder to drop to the sample groove inside through the sliding block, avoids the sample tube to exceed shell body end face, influences the closed effect of upper cover to the whole, and the mechanism can effectively improve the convenience of sample tube placement.

[0015] 2. The utility model discloses can according to the diameter size of sample tube carry out flexible adjustment, when installing sample tube, only need to aim at the lower end of it installation groove to the inside and inserts, to the both sides of the clamping piece is extruded to provide appropriate installation space for sample tube, and at the same time, the spring of the clamping piece outside provides the reaction force to it after compression, under the pressure action, can make sample tube keep fixed at the position, the installation structure is not only convenient and easy to operate, carries out corresponding adjustment according to the sample tube of different diameter size, and can improve the positioning effect of sample tube, avoids falling in the process of blowing.

[0016] 3. The utility model discloses can adjust the position and air volume of air outlet, install flow regulating valve on one end of every gas conveying branch pipe, and flow regulating valve can not only open and close gas conveying branch pipe independently, but also can control the air intake of single gas conveying branch pipe, install adjusting mechanism on the other side of gas conveying branch pipe simultaneously, drive belt pulley to rotate through the second motor of opening inside, under the transmission of belt, can drive the other end of gas conveying branch pipe to carry out angle adjustment, thereby according to the sample tube of different depth, control air outlet angle and air volume, reach the best blowing effect.

[0017] 4. The utility model discloses install electric heating tube at the bottom of sample groove, connect electricity for electric heating tube, convert electric energy into heat energy, heat the water in the sample groove, satisfy the demand of sample tube heating, install water level sensor simultaneously, can real -time monitoring water level height, when water level is too low, signal generates to treater, remind on the display screen of control panel, in addition, the front end of shell body is equipped with water level scale window, and the user can also intuitively understand water level from water level scale window. ACCURACY OF DRAWINGS

[0018] Figure 1 It is the overall perspective drawing of the utility model;

[0019] Figure 2 It is the device solid drawing of the utility model after removing the shell;

[0020] Figure 3 It is the sample holder solid drawing of the utility model;

[0021] Figure 4 The internal structure front view of the utility model;

[0022] Figure 5 The internal structure side view of the utility model;

[0023] Figure 6 The internal structure of the utility model Figure 4 The local enlarged view of A area in the middle.

[0024] In the figure: 1, outer shell; 2, upper cover; 3, control panel; 4, water level scale window; 5, fixed frame; 6, gas branch pipe; 7, gas nozzle; 8, adjusting mechanism; 9, gas main pipe; 10, flow regulating valve; 11, sample holder; 12, mounting groove; 13, clamping piece; 14, spring; 15, side plate; 16, connecting plate; 17, guide block; 18, sample groove; 19, electric heating tube; 20, water level sensor; 21, transmission cavity; 22, threaded rod; 23, sliding block; 24, first motor; 25, second motor; 26, pulley; 27, belt. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0026] Please refer to Figures 1-6 The utility model provides an embodiment: a novel nitrogen blowing instrument, including outer shell 1, the side of upper end surface of outer shell 1 is provided with control panel 3, the inside of outer shell 1 is provided with sample groove 18, the upper end in sample groove 18 is installed with sample holder 11, and sample holder 11 and sample groove 18 are slidingly matched, the inside of sample holder 11 is rectangular array and is provided with multiple mounting grooves 12, the both sides in mounting groove 12 are provided with clamping piece 13, and clamping piece 13 is arc structure, spring 14 is fixedly installed between the outside of clamping piece 13 and mounting groove 12, the rear wall of outer shell 1 is equipped with transmission cavity 21, the inside of transmission cavity 21 is rotatably installed with threaded rod 22, the outside of threaded rod 22 is installed with sliding block 23, and sliding block 23 is connected with threaded rod 22 through screw thread, the rear end of sample holder 11 is fixedly provided with side plate 15, and side plate 15 is connected with sliding block 23 through connecting plate 16, the lower end of threaded rod 22 is provided with first motor 24, and first motor 24 is fixed on the lower end of the rear wall of outer shell 1, the both sides of the rear end face of side plate 15 are fixedly equipped with guide block 17, and guide block 17 is slidingly limited with outer shell 1.

[0027] In use, the first motor 24 is turned on, the output shaft drives the threaded rod 22 to rotate, and the rotation is converted into linear motion under the friction between the outer thread of the threaded rod 22 and the inner thread hole of the sliding block 23, thereby driving the sample rack 11 to lift through the connecting plate 16 and the side plate 15 until it is above the end face of the outer shell 1, and the sample tube is placed with its lower end aligned with the installation slot 12 and inserted towards the inside, and the clamping pieces 13 on both sides are pressed to provide a suitable installation space for the sample tube, and at the same time the springs 14 on the outside of the clamping pieces 13 are compressed to provide a counterforce, which can keep the sample tube fixed in place under pressure. After installation, the first motor 24 is reversed, and the sample rack 11 is lowered to the inside of the sample groove 18 through the sliding block 23, avoiding the sample tube protruding above the end face of the outer shell 1 and affecting the sealing effect of the upper cover 2 on the whole.

[0028] Please refer to Figure 2 , Figure 4 and Figure 5 , the upper cover 2 is arranged above the sample groove 18, and the rear end of the upper cover 2 is connected to the outer shell 1 through a rotating shaft, two fixed frames 5 are fixedly arranged inside the upper cover 2, a gas distribution branch pipe 6 is installed between the two fixed frames 5, the gas distribution branch pipe 6 is rotatably connected to the fixed frame 5 through a bearing, the bottom of the gas distribution branch pipe 6 is provided with a plurality of gas nozzles 7, the outside of one side of the fixed frame 5 is provided with a gas main pipe 9, the gas main pipe 9 is connected to the gas distribution branch pipe 6 through a connecting pipe, and the end of the gas distribution branch pipe 6 close to the gas main pipe 9 is provided with a flow regulating valve 10.

[0029] By installing the flow regulating valve 10 at one end of each gas distribution branch pipe 6, the flow regulating valve 10 can not only independently open and close the gas distribution branch pipe 6, but also control the air intake of the single gas distribution branch pipe 6.

[0030] Please refer to Figure 6 , the upper end of the other fixed frame 5 is provided with an adjusting mechanism 8, the inside of the adjusting mechanism 8 is fixedly installed with a second motor 25, the output shaft of the second motor 25 and the other end of the gas distribution branch pipe 6 are both fixedly provided with a belt pulley 26, and the two belt pulleys 26 are connected by a belt 27.

[0031] The second motor 25 inside is turned on, the output shaft drives the belt pulley 26 to rotate, and under the transmission action of the belt 27, it can drive the other end of the gas distribution branch pipe 6 to adjust the angle, so as to control the air outlet angle and air volume according to the sample tube of different depth, and achieve the best blowing effect.

[0032] Please refer to Figure 4 and Figure 5 , the bottom of the sample groove 18 is provided with an electric heating pipe 19, one side of the inside of the sample groove 18 is provided with a water level sensor 20, and the front end of the outer shell 1 is provided with a water level scale window 4.

[0033] The water in the sample tank 18 is heated by converting the electric energy into heat energy through the electric heating pipe 19, and the water level sensor 20 is installed to monitor the water level in real time, and when the water level is too low, a signal is generated to the processor to remind on the display screen of the control panel 3, and the front end of the shell body 1 is provided with a water level scale window 4, and the user can also intuitively understand the water level from the water level scale window 4.

[0034] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims instead of the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A novel nitrogen blowing device, comprising an outer casing (1), characterized in that: The outer shell (1) has a sample slot (18) inside. A sample holder (11) is installed at the upper end of the sample slot (18), and the sample holder (11) slides with the sample slot (18). The sample holder (11) has multiple mounting slots (12) arranged in a rectangular array inside. Clips (13) are provided on both sides of the mounting slots (12), and the clips (13) have an arc-shaped structure. A spring (14) is fixedly installed between the outer side of the clips (13) and the mounting slot (12). The rear wall of the outer shell (1) The sample holder (11) is provided with a transmission cavity (21), and a threaded rod (22) is rotatably installed inside the transmission cavity (21). A sliding block (23) is installed outside the threaded rod (22), and the sliding block (23) is connected to the threaded rod (22) by a thread. A side plate (15) is fixedly provided at the rear end of the sample holder (11), and the side plate (15) is connected to the sliding block (23) by a connecting plate (16). A first motor (24) is provided at the lower end of the threaded rod (22), and the first motor (24) is fixed at the lower end of the rear wall of the outer shell (1).

2. The novel nitrogen blowing device according to claim 1, characterized in that: A top cover (2) is provided above the sample tank (18), and the rear end of the top cover (2) is connected to the outer shell (1) through a rotating shaft. Fixing frames (5) are fixedly provided on both sides inside the top cover (2). A gas supply branch pipe (6) is installed between the two fixing frames (5), and the gas supply branch pipe (6) is rotatably connected to the fixing frame (5) through a bearing. Multiple gas nozzles (7) are provided at the bottom of the gas supply branch pipe (6). A gas supply main pipe (9) is provided on the outside of one side of the fixing frame (5), and the gas supply main pipe (9) is connected to the gas supply branch pipe (6) through connecting pipes. A flow regulating valve (10) is installed at the end of the gas supply branch pipe (6) near the gas supply main pipe (9).

3. A novel nitrogen blowing device according to claim 2, characterized in that: An adjustment mechanism (8) is provided at the upper end of the fixed frame (5) on the other side. A second motor (25) is fixedly installed inside the adjustment mechanism (8). A pulley (26) is fixedly provided at the other end of the output shaft of the second motor (25) and the gas supply branch pipe (6). The two pulleys (26) are connected by a belt (27).

4. A novel nitrogen blowing device according to claim 1, characterized in that: Guide blocks (17) are fixedly provided on both sides of the rear end face of the side plate (15), and the guide blocks (17) slide and limit the outer shell (1).

5. A novel nitrogen blowing device according to claim 1, characterized in that: An electric heating tube (19) is installed at the bottom of the sample cell (18).

6. A novel nitrogen blowing device according to claim 1, characterized in that: A water level sensor (20) is installed on one side inside the sample tank (18), and a water level scale window (4) is provided at the front end of the outer shell (1).

7. A novel nitrogen blowing device according to claim 1, characterized in that: A control panel (3) is provided on one side of the upper surface of the outer casing (1).

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