CN118225540A - Nitrogen blows device and contains experimental facilities that this nitrogen blown device - Google Patents

Abstract

The invention belongs to the technical field of automatic equipment, and discloses a nitrogen blowing device and experimental equipment comprising the same. The nitrogen blowing device comprises a quick-change connector and a lifting mechanism, wherein the quick-change connector is provided with a first air passage, one end of the quick-change connector is connected with the lifting mechanism, the other end of the quick-change connector is connected with a nitrogen blowing needle tray, and the nitrogen blowing needle tray can be assembled and disassembled on the lifting mechanism through the quick-change connector; the nitrogen blowing needle tray is provided with a second air passage communicated with the nitrogen blowing needle body, and when the nitrogen blowing needle tray is connected with the quick-change connector, the first air passage is communicated with the second air passage; when the nitrogen blowing needle tray is separated from the quick-change connector, the first air channel and the second air channel are disconnected. According to the nitrogen blowing device and the experimental equipment comprising the nitrogen blowing device, the nitrogen blowing needle tray is assembled and disassembled and the nitrogen is turned on and off through the quick-change connector, so that the convenience of replacing the nitrogen blowing needle tray can be improved; and can realize full-automatic nitrogen and blow the operation, do not need artifical the participation, can show improvement nitrogen and blow efficiency and laboratory personnel's security.

Description

Nitrogen blows device and contains experimental facilities that this nitrogen blown device

Technical Field

The invention belongs to the technical field of automatic equipment, and particularly relates to a nitrogen blowing device and experimental equipment comprising the same.

Background

In the work-up of automated synthesis experiments, there are many synthetic compounds that require drying of the solvent by nitrogen blowing. At present, most of nitrogen blowing instruments in the market need operators to manually operate, the workload is very large, and the nitrogen blowing needle is not easy to replace and cross contamination is easy to generate. Moreover, many solvents and compounds are toxic and can easily cause personal injury to operators exposed to the laboratory.

Disclosure of Invention

Based on the above, an object of the present invention is to provide a nitrogen blowing device capable of realizing an automatic nitrogen blowing operation and an experimental apparatus including the nitrogen blowing device.

To achieve the purpose, the invention adopts the following technical scheme:

The nitrogen blowing device comprises a nitrogen blowing needle tray and a test tube tray, wherein a nitrogen blowing needle body is fixed at the bottom of the nitrogen blowing needle tray, the test tube body is inserted into the test tube tray, and the test tube tray is positioned below the nitrogen blowing needle tray; the nitrogen blowing device further comprises:

The quick-change connector is provided with a first air passage;

The nitrogen blowing needle tray can be assembled and disassembled in the lifting mechanism through the quick-change connector, and can be driven to lift by a driving piece arranged on the lifting mechanism so as to enable the nitrogen blowing needle body to be close to or far away from the test tube body;

the nitrogen blowing needle tray is provided with a second air passage communicated with the nitrogen blowing needle body, and when the nitrogen blowing needle tray is connected with the quick-change connector, the first air passage is communicated with the second air passage; when the nitrogen blowing needle tray is separated from the quick-change connector, the first air channel is disconnected from the second air channel.

As an alternative scheme of the nitrogen blowing device, the quick-change connector comprises a quick-change male head and a quick-change female head, the quick-change male head and the quick-change female head are respectively arranged on the lifting mechanism and the nitrogen blowing needle tray, gas modules are arranged on the quick-change male head and the quick-change female head, and gas holes which are communicated with each other are arranged on the two gas modules so as to form the first gas path; the nitrogen blowing needle tray is provided with an air hole, and the air hole on the quick-change female head is communicated with the air hole to form the second air channel.

As an alternative scheme of the nitrogen blowing device, a hollow cavity is formed in the nitrogen blowing needle tray and is divided into a first air cavity and a second air cavity by a flow stabilizing plate, and a plurality of air holes for communicating the first air cavity and the second air cavity are formed in the flow stabilizing plate; the first air cavity is communicated with the air holes on the quick-change female head through the air holes formed in the top of the nitrogen blowing needle tray; the second air cavity is communicated with the nitrogen blowing needle body.

As an alternative scheme of the nitrogen blowing device, the nitrogen blowing needle tray comprises an upper bus plate and a lower bus plate which are attached to each other, a stepped groove is formed in the bottom of the upper bus plate, the lower bus plate covers the opening of the stepped groove, and the lower bus plate and the stepped groove form the hollow cavity;

The steady flow plate is buckled on the step of the step-shaped groove and surrounds the groove bottom and the groove wall of the step-shaped groove into a first air cavity; the lower bus plate, the current stabilizer and the groove wall of the stepped groove enclose a second air cavity;

the top of the nitrogen blowing needle body penetrates through the lower bus plate and stretches into the second air cavity to be communicated with the second air cavity;

And a sealing ring is arranged between the upper bus plate and the lower bus plate, and the sealing ring is arranged on the outer ring of the stepped groove in a surrounding mode.

As an alternative scheme of the nitrogen blowing device, a heating module is arranged at the bottom of the test tube tray, and the test tube tray is detachably connected with the heating module; the heating module comprises a heating film;

A heat conducting plate is arranged at the top of the heating film; the bottom of the heating film is provided with a heat insulation plate; and a heat distribution plate is arranged between the heating film and the heat insulation plate.

As an alternative scheme of the nitrogen blowing device, the nitrogen blowing device further comprises a base, wherein the base is of a three-dimensional structure consisting of a bottom plate, a top plate and two oppositely arranged side plates; the top plate is a heat insulation plate;

The heating module further comprises a temperature controller, the temperature controller is arranged in an accommodating space surrounded by the bottom plate, the top plate and the two side plates, and the temperature controller is electrically connected with the heating film.

As an alternative of the nitrogen blowing device, the top of the heating module and the bottom of the test tube tray are provided with positioning structures; the positioning structure comprises positioning pins and positioning holes which are respectively arranged on the heating module and the test tube tray.

As an alternative scheme of the nitrogen blowing device, a jack is arranged on the test tube tray, and the test tube body is inserted into the jack; and a clamping elastic sheet used for clamping the test tube body is arranged in the jack.

As an alternative scheme of the nitrogen blowing device, the nitrogen blowing device further comprises an air exhaust pipeline, an air exhaust hole is formed in the air exhaust pipeline, and the air exhaust pipeline is communicated with air exhaust equipment through an air exhaust interface; the air exhaust hole is close to the upper space of the test tube body.

As an alternative scheme of the nitrogen blowing device, the air exhaust pipeline is positioned at two sides of the lifting mechanism and is in a U-shaped structure; the two air extraction holes are arranged and are all positioned above the bottle mouth of the test tube body.

As an alternative of the nitrogen blowing device, the nitrogen blowing device further comprises an electric proportional valve, one end of the electric proportional valve is connected with a nitrogen conveying pipe, the nitrogen conveying pipe is communicated with the first air path, and the other end of the electric proportional valve is connected with a nitrogen supply device.

As an alternative scheme of the nitrogen blowing device, the lifting mechanism is a sliding table, and the nitrogen blowing needle tray is fixedly connected with the sliding block of the sliding table through a connecting plate; the quick-change male head is fixedly connected to the connecting plate, and the driving piece drives the sliding block to do lifting motion.

The experimental equipment comprises a mechanical arm and at least one nitrogen blowing device, wherein the mechanical arm is used for loading and unloading a nitrogen blowing needle tray of the nitrogen blowing device on the lifting mechanism through a quick-change connector; and/or the mechanical arm is used for taking and placing the test tube tray of the nitrogen blowing device.

The invention has the beneficial effects that:

1. According to the nitrogen blowing device and experimental equipment comprising the nitrogen blowing device, the nitrogen blowing needle tray is assembled and disassembled and the nitrogen is turned on and off through the quick-change connector, so that the convenience of replacing the nitrogen blowing needle tray is improved, the problem of cross contamination is solved, and the accuracy of experimental results is ensured.

2. According to the nitrogen blowing device and experimental equipment comprising the nitrogen blowing device, when the nitrogen blowing device is used, the driving piece can drive the nitrogen blowing needle tray to lift, the quick replacement of the nitrogen blowing needle tray is realized through the quick-change connector and the mechanical arm, the test tube tray is taken and placed through the mechanical arm, full-automatic nitrogen blowing operation can be realized, manual participation is not needed, and the nitrogen blowing efficiency and the safety of experimental staff can be remarkably improved.

Drawings

FIG. 1 is a schematic view of the overall structure of a nitrogen blowing device according to the present invention at a first view angle;

FIG. 2 is a schematic view of the overall structure of the nitrogen blowing device according to the present invention at a second view angle;

FIG. 3 is a schematic cross-sectional view of a nitrogen blowing needle tray of the nitrogen blowing device provided by the invention;

FIG. 4 is a schematic diagram of the overall structure of a heating module of the nitrogen blowing device provided by the invention;

Fig. 5 is a schematic view of the overall structure of the test tube tray of the nitrogen blowing device provided by the invention under a first view angle;

fig. 6 is a schematic diagram of the overall structure of the test tube tray of the nitrogen blowing device according to the second view angle.

In the figure:

10-a base; 11-a bottom plate; 12-side plates; 121-a protective cover; 13-top plate;

20-temperature controller;

30-a heating module; 31-heating the film; 32-a heat-conducting plate; 321-a temperature sensor; 322-locating pins; 33-a heat distribution plate;

40-risers;

50-an air extraction pipeline; 51-an air extraction interface; 52-an air pumping hole; 53-fitting a plate;

60-quick-change joint; 61-quick-change male; 611-an air inlet; 62-quick-changing the female head; 621-air outlet holes;

70-lifting mechanism; 71-a driving member; 711-motor drive plate; 72-screw rod; 73-a guide rail; 74-a slider; 75-connecting plates;

80-an electrical proportional valve;

100-test tube trays; 101-positioning holes; 102-clamping the spring plate; 110-a test tube body;

200-nitrogen blowing needle tray; 201-upper bus plate; 202-a lower bus plate; 203, a current stabilizer; 204-a first air cavity; 205-a second air cavity; 206-sealing ring; 207-vent holes; 210-nitrogen blowing needle body.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

This embodiment provides a nitrogen blows device, this nitrogen blows device carries out nitrogen and blows needle tray loading and unloading and nitrogen break-make through quick change joint, when improving the convenience that nitrogen blown needle tray changed, the setting of quick change joint still makes this nitrogen blow needle tray change operation can be accomplished by the arm, combine the lift operation that nitrogen blown needle tray by driving piece drive such as motor or cylinder to and the operation is put in getting of the test tube tray that is carried out by the arm, realize the full automatic operation that nitrogen blown, in order to solve current nitrogen and blow operating efficiency low, and the operator is easily received the problem of poison gas damage.

Fig. 1 is a schematic diagram of the overall structure of the nitrogen blowing device according to the present invention at a first view angle, fig. 2 is a schematic diagram of the overall structure of the nitrogen blowing device according to the present invention at a second view angle, and referring to fig. 1 and 2, the nitrogen blowing device according to the present embodiment includes a nitrogen blowing needle tray 200 and a test tube tray 100, wherein a plurality of nitrogen blowing needle bodies 210 are fixed at the bottom of the nitrogen blowing needle tray 200, a plurality of test tube bodies 110 are inserted into the test tube tray 100, the test tube tray 100 is located below the nitrogen blowing needle tray 200, the number of the nitrogen blowing needle bodies 210 is the same as the number of the test tube bodies 110, and the positions of the nitrogen blowing needle bodies 210 are opposite.

The nitrogen blowing device provided in this embodiment further includes a quick-change connector 60 and a lifting mechanism 70, the quick-change connector 60 has a first air path, one end of the quick-change connector 60 is connected with the lifting mechanism 70, the other end of the quick-change connector 60 is connected with a nitrogen blowing needle tray 200, the nitrogen blowing needle tray 200 is detachable from the lifting mechanism 70 through the quick-change connector 60, and the nitrogen blowing needle tray 200 can be lifted by a driving member 71 provided by the lifting mechanism 70, so that the nitrogen blowing needle body 210 is close to or far away from the test tube body 110.

The nitrogen blowing needle tray 200 has a second air path communicating with the nitrogen blowing needle body 210, and when the nitrogen blowing needle tray 200 is connected with the quick-change coupler 60, the first air path communicates with the second air path; when the nitrogen blowing needle tray 200 is separated from the quick change coupler 60, the first air path is disconnected from the second air path.

According to the nitrogen blowing device provided by the embodiment, the quick-change connector 60 is used for loading and unloading the nitrogen blowing needle tray 200 and switching on and off of nitrogen, so that the convenience of replacing the nitrogen blowing needle tray 200 is improved, the problem of cross contamination is solved, and the accuracy of an experiment result is ensured. Meanwhile, in this embodiment, the quick-change connector 60 is arranged to enable the nitrogen blowing device to achieve the operation of replacing the nitrogen blowing needle tray 200 by the mechanical arm, and then replace the test tube tray 100 by the mechanical arm, and the driving piece 71 drives the lifting operation of the nitrogen blowing needle tray 200, so that the nitrogen blowing device can achieve the full-automatic operation of nitrogen blowing, thereby improving the efficiency of nitrogen blowing operation, avoiding the operator from being exposed to volatile gas, and achieving the purpose of protecting the personal safety of the operator.

Specifically, in this embodiment, the quick-change connector 60 includes a quick-change male head 61 and a quick-change female head 62, wherein the quick-change male head 61 is disposed on the lifting mechanism 70, the quick-change female head 62 is disposed on the nitrogen blowing needle tray 200, gas modules are disposed on the quick-change male head 61 and the quick-change female head 62, and the two gas modules are provided with gas holes that are communicated to form a first gas path; the nitrogen blowing needle tray 200 is provided with a vent 207, and the vent on the quick-change female 62 is communicated with the vent 207 to form a second air path.

More specifically, the gas module of the quick-change male head 61 is provided with a gas inlet hole 611 communicated with a gas hole formed therein, the gas module of the quick-change female head 62 is provided with a gas outlet hole 621 communicated with a gas hole formed therein, the gas inlet hole 611 is communicated with a nitrogen delivery pipe (not shown), and the gas outlet hole 621 is communicated with the gas vent 207 through a gas pipe, so that nitrogen in the nitrogen delivery pipe can be input into the nitrogen blowing needle body 210 through the quick-change connector 60.

In this embodiment, the fixing positions of the quick-change male head 61 and the quick-change female head 62 can be set inversely according to the needs, and the air inlet hole 611 and the air outlet hole 621 can be connected inversely according to the needs.

The quick-change connector 60 according to the present embodiment is a prior art, and may also be referred to as a robot quick-change tool, a robot tool quick-change device, a robot quick-change disc, etc., and the internal structure and the working principle thereof will not be described again. Specifically, the present embodiment may be used with an OX-10B-T1 type quick change coupler 60 of the star machine.

The nitrogen blowing device provided in this embodiment uses the quick-change connector 60, that is, the quick-change male head 61 and the quick-change female head 62 which are respectively fixed on the lifting mechanism 70 and the nitrogen blowing needle tray 200, to connect and fix the lifting mechanism 70 and the nitrogen blowing needle tray 200, and to connect nitrogen through the gas modules arranged on the quick-change male head 61 and the quick-change female head 62, so that the nitrogen blowing device can realize the conduction of nitrogen while fixing the nitrogen blowing needle tray 200, and the nitrogen delivery pipe does not need to be detached and connected in addition, so that the replacement of the nitrogen blowing needle tray 200 is more convenient.

With continued reference to fig. 1, the nitrogen blowing apparatus provided in this embodiment further includes a base 10, a heating module 30 is fixed on top of the base 10, and in use, the test tube tray 100 is placed on the heating module 30, and the heating module 30 heats the test tube tray 100.

Specifically, the base 10 is a three-dimensional structure composed of a bottom plate 11, a top plate 13 and two opposite side plates 12, wherein the bottom plate 11 provides a mounting surface for each part; the top plate 13 is a heat insulation plate made of heat insulation materials such as PPS and the like and mainly used for manufacturing a heat insulation layer to prevent heat from being transferred to other parts; the outer wall of the side plate 12 is fixed with a PCB board, and a protective cover 121 for protecting the PCB board is buckled on the outer wall of the side plate 12.

The heating module 30 comprises a heating film 31, a heat conducting plate 32 and a heat distribution plate 33, wherein the heating film 31 is a heating part, and heating elements such as a silica gel heating film can be selected; a heat conductive plate 32 is provided on top of the heating film 31 for transferring heat to the test tube tray 100, and preferably, a temperature sensor 321 may be provided in the heat conductive plate 32 to monitor the heating temperature of the heating module 30; the heat distribution plate 33 is disposed at the bottom of the heating film 31, and is used for dispersing heat of the heating film 31, so that the heat of the heating film 31 is uniformly distributed, and the heat insulation plate is prevented from being blackened by the heating coil in the heating film 31. In practice, the heat distribution plate 33 may be made of a material having good heat conductivity and corrosion resistance, such as stainless steel.

The heating module 30 provided in this embodiment further includes a temperature controller 20, where the temperature controller 20 is disposed in an accommodating space surrounded by the bottom plate 11, the top plate 13 and the two side plates 12, and the temperature controller 20 is electrically connected to the heating film 31 for controlling the heating temperature of the heating film 31.

Preferably, the heating module 30 may further include a protection switch for switching on and off the power supply to the heating film 31. The temperature controller 20 is respectively connected with the temperature sensor 321 and the protection switch, and when the temperature sensor 321 detects that the temperature is too high, the temperature controller 20 can control the protection switch to disconnect the power supply of the heating film 31 so as to play a role in regulating the temperature.

In this embodiment, the riser 40 is fixed to the base 10, and in other embodiments, the riser 40 may be configured as a frame structure according to need, and the lifting mechanism 70 is disposed on the riser 40. Specifically, the lifting structure 70 may be a sliding table structure composed of a screw 72, a slider 74, a guide rail 73 and a motor as the driving member 71, and of course, in other embodiments, other types of linear displacement structures may be used.

More specifically, in this embodiment, the guide rail 73 and the motor are both fixed on the riser 40, the screw 72 is driven to rotate by the motor, the motor can be controlled and driven by the motor driving plate 711, the slider 74 slides along the guide rail 73, the slider 74 is in threaded connection with the screw 72, and the screw 72 drives the slider 74 to perform linear displacement. In this embodiment, a connection plate 75 is fixed to the slider 74, and the nitrogen blowing needle tray 200 is connected and fixed to the slider 74 via the connection plate 75. Meanwhile, the top of the guide rail 73 can be provided with a sensing device such as a U-shaped photoelectric switch and the like for limiting the upward movement of the sliding block 74.

The nitrogen blowing device provided in this embodiment further includes an air extraction pipe 50, where the air extraction pipe 50 has an inverted U-shaped structure and is located at two sides of the lifting mechanism 70, the top of the air extraction pipe 50 is fixed at the top end of the riser 40, and two ends of the bottom of the air extraction pipe are connected and fixed with the riser 40 through the assembly plate 53, so as to ensure stability thereof. In the present embodiment, the motor driving plate 711 is fixed to the mounting plate 53 to save space. The top of the air extraction pipeline 50 is provided with an air extraction interface 51, the air extraction pipeline 50 is communicated with air extraction equipment through the air extraction interface 51, two ends of the air extraction pipeline 50 are provided with air extraction holes 52, the air extraction holes 52 face the side of the test tube body 110 and are close to the upper space of the test tube body 110, so that volatile gas generated by the test tube body 110 is timely extracted.

The nitrogen blowing device provided in this embodiment further includes an electrical proportional valve 80, one end of the electrical proportional valve 80 is connected to a nitrogen delivery pipe, the nitrogen delivery pipe is connected to the first air path, the other end of the electrical proportional valve 80 is connected to a nitrogen supply device, nitrogen passes through the electrical proportional valve 80, enters the nitrogen blowing needle body 210 through the nitrogen delivery pipe and the quick-change connector 60, and the air flow of the nitrogen blowing needle body 210 is controlled in real time by the electrical proportional valve 80.

Fig. 3 is a schematic cross-sectional structure of a nitrogen blowing needle tray 200 of the nitrogen blowing device provided by the invention, referring to fig. 3, in this embodiment, a hollow cavity is formed in the nitrogen blowing needle tray 200, the hollow cavity is divided into a first air cavity 204 and a second air cavity 205 by a flow stabilizing plate 203, the first air cavity 204 is communicated with an air outlet hole 621 on the quick-change connector 60 through an air vent 207 formed at the top of the nitrogen blowing needle tray 200, and the second air cavity 205 is communicated with the nitrogen blowing needle body 210; the flow stabilizing plate 203 is used for redistributing nitrogen, the flow stabilizing plate 203 is provided with a plurality of ventilation holes for communicating the first air cavity 204 and the second air cavity 205, and the nitrogen can more uniformly enter each nitrogen blowing needle body 210 through the flow stabilizing plate 203.

More specifically, in this embodiment, the nitrogen blowing needle tray 200 is composed of an upper bus plate 201 and a lower bus plate 202 that are attached to each other, a stepped slot is formed at the bottom of the upper bus plate 201, and the lower bus plate 202 covers the opening of the stepped slot and forms a hollow cavity with the stepped slot; the stabilizer 203 is fastened on the step of the step-shaped groove and can be fixed by welding, bonding, etc. The flow stabilizing plate 203 and the groove bottom and the groove wall of the step-shaped groove enclose a first air cavity 204, and the lower flow converging plate 202, the flow stabilizing plate 203 and the groove wall of the step-shaped groove enclose a second air cavity 205; the top of the nitrogen blowing needle body 210 penetrates through the lower bus plate 202 and stretches into the second air cavity 205 to be communicated with the second air cavity 205; in order to avoid nitrogen leakage, a sealing ring 206 is arranged between the upper bus plate 201 and the lower bus plate 202, and the sealing ring 206 is enclosed on the outer ring of the stepped groove.

Fig. 4 is a schematic overall structure of a heating module 30 of the nitrogen blowing device provided by the present invention, and fig. 5 is a schematic overall structure of a test tube tray 100 of the nitrogen blowing device provided by the present invention under a first view angle, and referring to fig. 4 and 5, in this embodiment, a positioning structure is provided on a top of the heating module 30 and a bottom of the test tube tray 100 to accurately position the test tube tray 100, so that a test tube body 110 is opposite to a nitrogen blowing needle body 210.

In particular, the positioning structure may include positioning pins 322 and positioning holes 101 provided on the heating module 30 and the test tube tray 100, respectively. More specifically, the number of the positioning pins 322 and the positioning holes 101 is two. Preferably, the positioning pin 322 is a taper pin so that it can be smoothly inserted into the positioning hole 101; one of the positioning holes 101 may be provided as a long hole to avoid the influence of dimensional tolerances of the positioning pin 322 and the positioning hole 101 on the insertion positioning of both.

Of course, in other embodiments, other types of positioning structures, such as a groove formed on the heat-conducting plate 32 and matching the bottom dimension of the test tube tray 100, may be provided as desired.

Fig. 6 is a schematic diagram of the overall structure of the test tube tray 100 of the nitrogen blowing device according to the second view angle, and referring to fig. 6, in this embodiment, a jack is provided on the test tube tray 100, and the test tube body 110 is inserted into the jack. Preferably, in order to ensure the firmness of the plugging of the test tube body 110, a clamping elastic piece 102 for clamping the test tube body 110 can be arranged in the jack, one end of the clamping elastic piece 102 is fixed at the top of the test tube tray 100, the other end extends into the jack from the side edge, the free end of the clamping elastic piece 102 bends towards the inside of the jack, and when the test tube body 110 is plugged, the test tube body 110 is extruded through the elastic deformation of the clamping elastic piece 102, so that the test tube body 110 is clamped between the clamping elastic piece 102 and the inner wall of the jack.

Of course, in other embodiments, other types of structures, such as a rubber layer disposed on the inner wall of the jack, may be provided as required to improve the stability of the test tube body 110.

In addition, in order to facilitate gripping by the gripping jaw of the mechanical arm, in this embodiment, ear plates are disposed on both sides of the test tube tray 100 and the nitrogen blowing needle tray 200. Of course, this structure may be adjusted according to the shape of the robot arm, or may be configured as desired. The mechanical arm may be a multi-degree-of-freedom mechanical arm, such as a four-axis mechanical arm, a six-axis mechanical arm, or an xyz three-axis moving mechanism.

The working process comprises the following steps:

When nitrogen blowing is needed, the manipulator puts the test tube tray 100 on an automatic nitrogen blowing device, and moves the nitrogen blowing needle tray 200 to the position of the quick-change male head 61, and the quick-change female head 62 at the top of the nitrogen blowing needle tray is fixedly connected with the quick-change male head 61;

the heating film 31 heats the test tube tray 100 to a set temperature; simultaneously, the lifting mechanism 70 is driven by the driving piece 71 to move the nitrogen blowing needle tray 200 downwards until the nitrogen blowing needle body 210 is 1 cm to 2cm away from the liquid level of the test tube body 110;

The purge is started after the flow rate of the nitrogen is regulated to a set value through the electric proportional valve 80 until the solvent in each test tube body 110 is completely volatilized;

The lifting mechanism 70 is driven by the driving member 71 to move up the nitrogen blowing needle tray 200 to the initial position, and the manipulator takes out the nitrogen blowing test tube tray 100 and the nitrogen blowing needle tray 200.

The embodiment also provides an experimental facility, which comprises a mechanical arm and at least one nitrogen blowing device, wherein the mechanical arm is used for loading and unloading a nitrogen blowing needle tray 200 of the nitrogen blowing device on the lifting mechanism 70 through the quick-change connector 60; and/or the mechanical arm is used for taking and placing the test tube tray 100 of the nitrogen blowing device.

Note that: the fixing manner which is not explicitly described in the text can be selected from common fixing connection manners such as threaded connection, welding or bonding according to the requirement.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims (13)

1. The nitrogen blowing device comprises a nitrogen blowing needle tray (200) and a test tube tray (100), wherein a nitrogen blowing needle body (210) is fixed at the bottom of the nitrogen blowing needle tray (200), a test tube body (110) is inserted into the test tube tray (100), and the test tube tray (100) is positioned below the nitrogen blowing needle tray (200); the nitrogen blowing device is characterized by further comprising:

a quick-change connector (60), the quick-change connector (60) having a first air path;

The quick-change connector (60) is connected with the lifting mechanism (70), the other end of the quick-change connector (60) is connected with the nitrogen blowing needle tray (200), the nitrogen blowing needle tray (200) can be assembled and disassembled in the lifting mechanism (70) through the quick-change connector (60), and the nitrogen blowing needle tray (200) can be driven to lift by a driving piece (71) arranged on the lifting mechanism (70) so as to enable the nitrogen blowing needle body (210) to be close to or far away from the test tube body (110);

The nitrogen blowing needle tray (200) is provided with a second air passage communicated with the nitrogen blowing needle body (210), and when the nitrogen blowing needle tray (200) is connected with the quick-change connector (60), the first air passage is communicated with the second air passage; when the nitrogen blowing needle tray (200) is separated from the quick-change connector (60), the first air passage is disconnected from the second air passage.

2. The nitrogen blowing device according to claim 1, wherein the quick-change connector (60) comprises a quick-change male head (61) and a quick-change female head (62), the quick-change male head (61) and the quick-change female head (62) are respectively arranged on the lifting mechanism (70) and the nitrogen blowing needle tray (200), gas modules are arranged on the quick-change male head (61) and the quick-change female head (62), and gas holes which are communicated with each other are arranged on the two gas modules so as to form the first gas path; the nitrogen blowing needle tray (200) is provided with a vent hole (207), and the vent hole on the quick-change female head (62) is communicated with the vent hole (207) to form the second air path.

3. The nitrogen blowing device according to claim 2, wherein a hollow cavity is formed in the nitrogen blowing needle tray (200), the hollow cavity is divided into a first air cavity (204) and a second air cavity (205) by a flow stabilizing plate (203), and a plurality of air holes for communicating the first air cavity (204) with the second air cavity (205) are formed in the flow stabilizing plate (203); the first air cavity (204) is communicated with an air hole on the quick-change female head (62) through an air hole (207) arranged at the top of the nitrogen blowing needle tray (200); the second air cavity (205) is communicated with the nitrogen blowing needle body (210).

4. A nitrogen blowing device according to claim 3, wherein the nitrogen blowing needle tray (200) comprises an upper bus plate (201) and a lower bus plate (202) which are attached to each other, a stepped groove is formed in the bottom of the upper bus plate (201), and the lower bus plate (202) covers the opening of the stepped groove to form the hollow cavity with the stepped groove;

the flow stabilizing plate (203) is buckled on the step of the step-shaped groove and surrounds the groove bottom and the groove wall of the step-shaped groove to form a first air cavity (204); the lower bus plate (202) and the steady flow plate (203) and the groove wall of the step-shaped groove enclose a second air cavity (205);

the top of the nitrogen blowing needle body (210) penetrates through the lower bus plate (202) and stretches into the second air cavity (205) to be communicated with the second air cavity (205);

A sealing ring (206) is arranged between the upper bus plate (201) and the lower bus plate (202), and the sealing ring (206) is arranged on the outer ring of the stepped groove in a surrounding mode.

5. Nitrogen-blowing device according to any of claims 1-4, characterized in that the bottom of the test tube tray (100) is provided with a heating module (30), the test tube tray (100) being detachably connected to the heating module (30); the heating module (30) comprises a heating film (31);

A heat conducting plate (32) is arranged at the top of the heating film (31); the bottom of the heating film (31) is provided with a heat insulation plate; a heat distribution plate (33) is arranged between the heating film (31) and the heat insulation plate.

6. Nitrogen blowing device according to claim 5, characterized by further comprising a base (10), said base (10) being a three-dimensional structure consisting of a bottom plate (11), a top plate (13) and two oppositely arranged side plates (12); the top plate (13) is a heat insulation plate;

The heating module (30) further comprises a temperature controller (20), the temperature controller (20) is arranged in an accommodating space surrounded by the bottom plate (11), the top plate (13) and the two side plates (12), and the temperature controller (20) is electrically connected with the heating film (31).

7. Nitrogen blowing device according to claim 5, characterized in that the top of the heating module (30) and the bottom of the test tube tray (100) are provided with positioning structures; the positioning structure comprises a positioning pin (322) and a positioning hole (101) which are respectively arranged on the heating module (30) and the test tube tray (100).

8. Nitrogen blowing device according to any of claims 1-4, characterized in that said test tube tray (100) is provided with a receptacle, said test tube body (110) being inserted in said receptacle; and a clamping elastic sheet (102) for clamping the test tube body (110) is arranged in the jack.

9. The nitrogen blowing device according to any one of claims 1-4, further comprising an air extraction pipeline (50), wherein an air extraction hole (52) is formed in the air extraction pipeline (50), and the air extraction pipeline (50) is communicated with air extraction equipment through an air extraction interface (51); the air suction hole (52) is close to the upper space of the test tube body (110).

10. Nitrogen blowing device according to claim 9, characterized in that said suction pipes (50) are located on both sides of said lifting mechanism (70) and are of U-shaped configuration; the two air extraction holes (52) are arranged and are positioned above the bottle mouth of the test tube body (110).

11. The nitrogen blowing apparatus according to any one of claims 1 to 4, further comprising an electrical proportional valve (80), one end of the electrical proportional valve (80) being connected to a nitrogen gas delivery pipe, the nitrogen gas delivery pipe being in communication with the first gas circuit, the other end of the electrical proportional valve (80) being connected to a nitrogen gas supply device.

12. The nitrogen blowing device according to claim 2, wherein the lifting mechanism (70) is a sliding table, and the nitrogen blowing needle tray (200) is fixedly connected with a sliding block (74) of the sliding table through a connecting plate (75); the quick-change male head (61) is fixedly connected to the connecting plate (75), and the driving piece (71) drives the sliding block (74) to do lifting movement.

13. An experimental facility, characterized by comprising a mechanical arm and at least one nitrogen blowing device according to any of claims 1-12, said mechanical arm being adapted to load and unload a nitrogen blowing needle tray (200) of said nitrogen blowing device onto said lifting mechanism (70) via a quick change joint (60); and/or the mechanical arm is used for taking and placing a test tube tray (100) of the nitrogen blowing device.