CN116183948A

CN116183948A - Sampling equipment

Info

Publication number: CN116183948A
Application number: CN202310209227.6A
Authority: CN
Inventors: 侯兴凯; 刘东升
Original assignee: Shenzhen Cornley Bio Medical Co ltd
Current assignee: Shenzhen Cornley Bio Medical Co ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-05-30

Abstract

The invention discloses sampling equipment which comprises a sampling frame and a distribution valve, wherein the sampling frame is arranged above the distribution valve and is in rotary connection with an instrument, the sampling frame is provided with a plurality of rotary angles connected with different sample input ends, a sampling needle is arranged on the sampling frame and is communicated with a processing cavity of the instrument, a liquid outlet and a plurality of liquid inlet channels connected with a plurality of different processing medium input ends are arranged on the distribution valve, the distribution valve is used for switching the communication between the liquid outlet and any one of the liquid inlet channels, and in an initial state, the sampling needle is in a vertical state and is communicated with the liquid outlet. By adopting the invention, the sampling of various samples can be realized by the same sampling frame, the sample is prevented from being remained in the sampling needle to pollute the next sample, the steps are simple, the operation is easy, and the detection accuracy is ensured.

Description

Sampling equipment

Technical Field

The invention belongs to the technical field of device cleaning, and particularly relates to sampling equipment.

Background

The blood gas electrolyte analysis instrument is an instrument for detecting trace element content in a sample, the sample is various in variety, after detection is completed, a sampling device is required to be cleaned to prevent other detection reagents from being polluted, so that a detection result is invalid, a sampling needle in the prior art can only realize the back and forth motion from the original position to the same sampling position, sampling can be performed only after an operator visually confirms that the sample is in place and clicks a screen, and sample feeding of a needle cylinder and an ampoule bottle can be realized, and if capillary sample feeding is required to be realized, other configurations are required to be additionally added, so that the operation is complex; in addition, when cleaning sampling device, need have a plurality of airtight cavitys, reveal easily, and the flow path is complicated, installation maintenance is difficult, and the washing step is many, and is consuming time long, causes great influence to the detection of reagent.

Disclosure of Invention

The invention aims to solve the technical problems of complicated operation, complex flow path, multiple cleaning steps and long time consumption in the prior art.

In order to solve the technical problems, the invention provides sampling equipment which comprises a sampling frame and a distribution valve, wherein the sampling frame is arranged above the distribution valve and is in rotary connection with an instrument, the sampling frame is provided with a plurality of rotary angles connected with different sample input ends, a sampling needle is arranged on the sampling frame and is communicated with a processing cavity of the instrument, the distribution valve is provided with a liquid outlet and a plurality of liquid inlet channels connected with a plurality of different processing medium input ends, the distribution valve is used for switching the communication between the liquid outlet and any one of the liquid inlet channels, and in an initial state, the sampling needle is in a vertical state and is communicated with the liquid outlet.

As the preferable scheme of the invention, the sampling frame comprises a shell, a sampling assembly and a cam, wherein the sampling assembly is arranged in the shell, the sampling assembly comprises a rotating shaft, a connecting frame, a sliding block, a pressure spring, a push rod and a sampling needle, the shell is rotationally connected with the cam through the rotating shaft, a guide groove which is in sliding fit with the sliding block is arranged on the connecting frame, the pressure spring is arranged in the guide groove, one end of the push rod is fixedly provided with the sliding block, the other end of the push rod is provided with a connecting head, the bottom end of the pressure spring is propped against the sliding block, the connecting head is provided with an avoidance hole, the rotating shaft is provided with a hollow channel, one end of the sampling needle is movably inserted into the avoidance hole, the other end of the sampling needle is connected with the hollow channel, a through hole matched with the hollow channel is arranged on the cam, a fixed boss is arranged on one surface of the shell facing the cam, a movable boss is arranged on one surface of the sliding block facing the cam, a sliding groove which can slide the movable boss is arranged on the shell, a first groove, a second straight arc groove and a first straight arc groove are formed on the cam.

As a preferable scheme of the invention, one side of the cam far away from the shell is provided with a PCB board, hall sensors are respectively arranged on the PCB board and corresponding positions of the PCB board, the first initial clamping position, the first middle clamping position, the first terminal clamping position, the first liquid pumping level and the second liquid pumping level, and magnets are respectively arranged on the fixed boss and the movable boss.

As a preferable scheme of the invention, the sampling assembly further comprises a torsion spring and a torsion spring mounting seat, one end of the torsion spring mounting seat is rotationally connected with the rear cover, the other end of the torsion spring mounting seat is connected with the sliding block, the torsion spring is mounted on the torsion spring mounting seat, one end of the torsion spring is connected with the torsion spring mounting seat, and the other end of the torsion spring is connected with the connecting frame.

As a preferred scheme of the invention, the distribution valve comprises a stator assembly, a rotor assembly and a flow path plate internally provided with a plurality of micro-channels, the stator assembly comprises a stator shell, flow path pipes and sealing gaskets, the stator shell is fixedly arranged on the flow path plate, the sealing gaskets are covered on the stator shell, the flow path pipes are provided with a plurality of micro-flow path pipes, the flow path pipes are arranged in the stator shell and are circumferentially arranged, the lower ends of the flow path pipes are respectively communicated with the corresponding micro-channels in the flow path plate, the sealing gaskets comprise annular gaskets and insertion pipes, the bottom surfaces of the annular gaskets are propped against the upper end surface of the flow path pipes, the insertion pipes are provided with a plurality of insertion pipes which are fixedly arranged at the bottom of the annular gaskets and are circumferentially arranged, the insertion pipes are in one-to-one correspondence with the flow path pipes, the annular gaskets are provided with first flow holes which are in one-to-one correspondence communication, each micro-flow path in the flow path plate is respectively connected with a probe which a processing medium can be input, the probe, the micro-flow path pipes, the rotor and the corresponding micro-flow path pipes are sequentially communicated with the first flow path pipes, the liquid inlet assembly, the liquid outlet assembly, and the liquid inlet assembly are sequentially arranged at a certain angle, and the liquid inlet assembly are communicated with the rotor assembly.

As a preferable scheme of the invention, the rotor assembly comprises a rotor and a rotor fixing block, the rotor is rotatably connected above the stator assembly, the flow path plate and the stator assembly are both provided with mounting holes through which a rotor rotating shaft can pass, the rotor is fixedly connected with the rotor fixing block through screws, and the rotor fixing block is used as the rotor rotating shaft and is rotatably connected to the bottom of the flow path plate.

As a preferable scheme of the invention, the rotor comprises a flat sheet and a gear, a first cavity is arranged on the top surface of the gear, a conical boss is arranged at the center of the first cavity, the liquid outlet is arranged on the conical boss, a second cavity is arranged on the bottom surface of the gear, and the liquid inlet channel is formed by solder sealing between the flat sheet and the second cavity.

As a preferable scheme of the invention, a plurality of residual liquid recovery ports are arranged on the periphery of the conical boss, a residual liquid recovery groove is arranged at the position, corresponding to the residual liquid recovery ports, on the flat sheet, a residual liquid recovery channel is arranged on the rotor fixing block, and the residual liquid recovery channel is communicated with the residual liquid recovery groove.

As a preferable scheme of the invention, a wear-resistant gasket is arranged between the bottom surface of the rotor and the sealing gasket, the wear-resistant gasket is provided with a plurality of upper bosses and a plurality of lower bosses, the lower bosses are in one-to-one correspondence and are inserted with the first flow holes, the upper bosses and the lower bosses which are positioned at the same vertical position are mutually communicated to form second flow holes, and the first flow holes and the second flow holes are in one-to-one correspondence and are communicated.

As a preferable scheme of the invention, the flow path plate is provided with the light guide strip, the periphery of the bottom of the gear is provided with the skirt edge, one end of the light guide strip is positioned below the skirt edge of the gear, and the skirt edge is provided with the light through hole corresponding to the light guide strip.

Compared with the prior art, the sampling equipment provided by the invention has the beneficial effects that:

when a detection sample is extracted, the sampling frame is rotated to different angles, different samples can be connected and conveyed into the instrument for detection, in addition, after the first sample is detected, the sampling frame is rotated to an initial gear, the sampling needle is communicated with the liquid outlet, and a treatment medium connected with the liquid outlet flow channel can be conveyed into the instrument through the sampling needle, so that the cleaning of the sampling needle or the calibration of the instrument or the detection of the performance of the instrument can be realized; by adopting the invention, the sampling of various samples can be realized through the same sampling frame, and after the sampling needle extracts one sample, the sampling needle can be cleaned through the processing medium connected to the distribution valve, so that the sample is prevented from being remained in the sampling needle to pollute the next sample, the steps are simple, the operation is easy, and the detection accuracy is ensured.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

FIG. 1 is a schematic diagram of a sampling device according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the housing;

FIG. 3 is a schematic view of the push rod in a pushed state;

FIG. 4 is a schematic diagram of the structure of a sampling assembly;

FIG. 5 is a schematic view of the sampling assembly from another view direction;

FIG. 6 is a schematic view of the structure of the cam;

FIG. 7 is an exploded view of the dispensing valve;

FIG. 8 is a schematic structural view of a dispensing valve;

FIG. 9 is a cross-sectional view of a dispensing valve;

FIG. 10 is a schematic view of the structure of a flow path plate;

FIG. 11 is a schematic view of the flow field plate in another view;

FIG. 12 is a schematic structural view of a rotor assembly;

fig. 13 is an exploded view of the rotor assembly.

The marks in the figure:

a sampling rack 1; a dispensing valve 2; a housing 3; a sampling assembly 4; a cam 5; a rotating shaft 6; a connecting frame 7; a slider 8; a compression spring 9; a push rod 10; a sampling needle 11; a guide groove 12; a connector 13; a fixing boss 14; a movable boss 15; a chute 16; a first arc groove 17; a second arc groove 18; a first straight groove 19; a second straight groove 20; a stator assembly 21; a rotor assembly 22; a micro flow channel 23; a flow path plate 24; a stator housing 25; a flow path tube 26; a gasket 27; an annular gasket 28; a cannula 29; a first flow aperture 30; a probe 31; a liquid inlet channel 32; a rotor 33; a rotor fixing block 34; a screw 35; a flat sheet 36; a gear 37; a first cavity 38; a conical boss 39; a liquid outlet 40; a second cavity 41; a raffinate recovery port 42; a raffinate recovery tank 43; a raffinate withdrawal passage 44; wear-resistant pad 45; a second flow aperture 46; a light guide bar 47; a skirt 48; a light passing hole 49; a waste liquid recovery port 50; a torsion spring 51; a torsion spring mount 52; a front cover 53; a rear cover 54; a connecting rod 55; a handle 56; a flow path flat plate 57; a flow channel plate 58; the first initial clamping position A1; the first middle clamping position B1; the first terminal clamping position C1; the second initial clamping position A2; the second middle clamping position B2; the second terminal clamping position C2; a first pumping level D1; a second pumping level D2.

Detailed Description

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. It should be understood that the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the invention.

As shown in fig. 1 to 13, a preferred embodiment of the present invention provides a sampling apparatus, which includes a sampling frame 1 and a distribution valve 2, the sampling frame 1 is disposed above the distribution valve 2, the sampling frame 1 is rotatably connected with an instrument, the sampling frame 1 has a plurality of rotation angles for connecting different sample input ends, a sampling needle 11 is disposed on the sampling frame 1, the sampling needle 11 is in communication with a processing cavity of the instrument, a liquid outlet 40 and a plurality of liquid inlet channels for connecting a plurality of different processing medium input ends are disposed on the distribution valve 2, the distribution valve 2 is used for switching the communication between the liquid outlet 40 and any one of the liquid inlet channels, in an initial state, the sampling needle 11 is in a vertical state, and the sampling needle 11 is in communication with the liquid outlet 40.

When a detection sample is extracted, the sampling frame 1 is rotated to different angles, different samples can be connected and conveyed into the instrument for detection, in addition, after the first sample is detected, the sampling frame 1 is rotated to an initial gear, the sampling needle 11 is communicated with the liquid outlet 40, and a treatment medium connected with the liquid outlet channel can be conveyed into the instrument through the sampling needle 11, so that the sampling needle 11 is cleaned or the instrument is calibrated or the instrument performance is detected; by adopting the invention, the sampling of various samples can be realized by the same sampling frame 1, and after the sampling needle 11 extracts one sample, the sampling needle 11 can be cleaned by the processing medium connected to the distribution valve 2, so that the sample is prevented from being remained in the sampling needle 11 to pollute the next sample, the steps are simple, the operation is easy, and the detection accuracy is ensured.

The sampling frame 1 comprises a shell 3, a sampling assembly 4 and a cam 5, the sampling assembly 4 is arranged in the shell 3, the sampling assembly 4 comprises a rotating shaft 6, a connecting frame 7, a sliding block 8, a pressure spring 9, a push rod 10 and a sampling needle 11, the shell 3 is rotationally connected with the cam 5 through the rotating shaft 6, a guide groove 12 which is in sliding fit with the sliding block 8 is arranged on the connecting frame 7, the pressure spring 9 is arranged in the guide groove 12, one end of the push rod 10 is fixedly provided with the sliding block 8, the other end of the push rod 10 is provided with a connecting head 13, the bottom end of the pressure spring 9 is propped against the sliding block 8, an avoidance hole is formed in the connecting head 13, a hollow channel is formed in the rotating shaft 6, one end of the sampling needle 11 is movably connected with the hole, the other end of the sampling needle 11 is connected with the hollow channel, a through hole matched with the hollow channel is formed in the cam 5, a fixed boss 14 is arranged on one surface of the shell 3, the sliding block 8 is provided with a first straight arc groove 15, a second arc groove 19 and a first arc groove 20 and a second arc groove 20 are formed in the shell 5, a first arc groove 15 and a second arc groove 19. Specifically, the housing 3 includes a front cover 53 and a rear cover 54, the front cover 53 and the rear cover 54 are connected by a connecting rod 55, and a handle 56 is provided on the rear cover 54.

In this embodiment, when the housing 3 rotates by a first angle relative to the cam 5, the fixed boss 14 moves from the first initial clamping position A1 to the first intermediate clamping position B1, the movable boss 15 moves from the second initial clamping position A2 to the second intermediate clamping position B2, and at this time, the sliding groove 16 is parallel to and opposite to the first straight groove 19, and pushes the push rod 10 to the first pumping level D1, so as to realize pumping; when the housing 3 rotates for a second angle relative to the cam 5, the fixed boss 14 moves from the first middle clamping position B1 to the first terminal clamping position C1, the movable boss 15 moves from the second middle clamping position B2 to the second terminal clamping position C2, and at this time, the sliding groove 16 is parallel and opposite to the second straight groove 20, so as to push the push rod 10 to the second liquid pumping level D2, thereby realizing liquid pumping. From this, the multiple spot location can be realized to sampling frame 1, can draw multiple sample on same sampling frame 1, and the practicality is strong.

Illustratively, a PCB board is disposed on a side of the cam 5 away from the housing 3, hall sensors are disposed on the PCB board corresponding to the first initial clamping position A1, the first intermediate clamping position B1, the first terminal clamping position C1, the first pumping level D1 and the second pumping level D2, and magnets are disposed on the fixed boss 14 and the movable boss 15. Therefore, the magnet can be matched with the Hall sensor to generate an electric signal and provide the electric signal for the instrument, and when the electric signal reaches the corresponding position, the instrument can receive the electric signal, and the corresponding position indicator lights are turned on, so that the accuracy of operation is ensured.

Illustratively, the sampling assembly 4 further includes a torsion spring 51 and a torsion spring mounting seat 52, one end of the torsion spring mounting seat 52 is rotatably connected with the rear cover 54, the other end of the torsion spring mounting seat 52 is connected with the slider 8, the torsion spring 51 is mounted on the torsion spring mounting seat 52, one end of the torsion spring 51 is connected with the torsion spring mounting seat 52, and the other end of the torsion spring 51 is connected with the connecting frame 7. Through the arrangement of the torsion spring 51, the rotation of the shell 3 can be smoother, and the fixed boss 14 and the movable boss 15 can be ensured to smoothly move to corresponding positions, so that the operation is convenient.

The distribution valve 2 includes a stator assembly 21, a rotor assembly 22, and a flow path plate 24 with a plurality of micro-channels 23 inside, the stator assembly 21 includes a stator housing 25, a flow path tube 26, and a sealing gasket 27, the stator housing 25 is fixedly disposed on the flow path plate 24, the sealing gasket 27 is disposed on the stator housing 25 in a covering manner, the flow path tube 26 is provided with a plurality of flow path tubes 26, the flow path tubes 26 are disposed in the stator housing 25 and are circumferentially disposed, the lower ends of the flow path tubes 26 are respectively communicated with the micro-channels 23 corresponding to the flow path plate 24, the sealing gasket 27 includes an annular gasket 28 and a plurality of insertion tubes 29, the bottom surface of the annular gasket 28 abuts against the upper end surface of the flow path tube 26, the insertion tubes 29 are fixedly disposed at the bottom of the annular gasket 28 and are circumferentially disposed, the insertion tubes 29 are in one-to-one correspondence with the flow path tube 26, the annular gasket 28 is provided with a first flow hole 30 in one-to-one correspondence with the insertion tubes 29, each flow path tube 23 in the flow path plate 24 is respectively communicated with the corresponding micro-channel 23, the flow path tube 22 is rotatably connected with the rotor assembly 22, and the probe assembly is rotatably connected with the first flow path assembly 32, and the probe assembly is rotatably connected with the flow path assembly 32.

Specifically, the flow path plate 24 is provided with a waste liquid recovery port 50, the flow path plate 24 is internally provided with a micro flow path 23 connected with the waste liquid recovery port 50, the flow path plate 24 comprises a flow path flat plate 57 and a flow path groove plate 58, the stator housing 25 is arranged on the flow path flat plate 57, and the micro flow path 23 is formed by solder sealing between the flow path flat plate 57 and the flow path groove plate. The waste liquid after the use of the instrument is conveyed to the waste liquid recovery port 50 through the external pipeline under the drive of the pump body in the instrument and then is discharged through the probe 31, so that the waste liquid can be properly treated, and biological pollution is prevented.

In this embodiment, the treatment medium may be a cleaning solution, a calibration solution or a quality inspection solution, when the analysis instrument sends a command to draw the calibration solution or the quality inspection solution, the driving end of the instrument drives the rotor to rotate by a certain angle, so that the liquid inlet channel 32 is communicated with the first flow hole 30, the cannula 29 and the flow path tube 26 corresponding to the reagent, and the instrument calibration can be performed by drawing the reagent into the instrument through the sampling needle 11; when the analysis instrument sends out an instruction and needs to extract cleaning liquid, the driving end of the instrument drives the rotor to continuously rotate by a certain angle, so that the liquid inlet channel 32 is communicated with the first flow hole 30, the insertion tube 29 and the flow path tube 26 corresponding to the reagent, and the reagent is extracted into the instrument through the sampling needle 11 on the instrument to clean the flow path; this ensures that the sampling needle 11 is not contaminated with each other during the process of sampling a plurality of different samples for detection.

Illustratively, the rotor assembly 22 includes a rotor 33 and a rotor fixing block 34, the rotor is rotatably connected above the stator assembly 21, the flow path plate 24 and the stator assembly 21 are both provided with mounting holes through which the rotor shaft 6 can pass, the rotor 33 is fixedly connected with the rotor fixing block 34 by screws 35, and the rotor fixing block 34 is rotatably connected to the bottom of the flow path plate 24 as the rotor shaft 6.

The exemplary rotor 33 includes a flat plate 36 and a gear 37, a first cavity 38 is disposed on a top surface of the gear 37, a conical boss 39 is disposed at a center of the first cavity 38, a liquid outlet 40 is disposed on the conical boss 39, a second cavity 41 is disposed on a bottom surface of the gear 37, and the liquid inlet channel 32 is formed by solder sealing between the flat plate 36 and the second cavity 41. This ensures the connection between the flat piece 36 and the gear 37, and prevents the flat piece from falling off.

Illustratively, a plurality of residual liquid recovery ports 42 are disposed around the conical boss 39, a residual liquid recovery groove 43 is disposed on the flat plate 36 corresponding to the residual liquid recovery ports 42, a residual liquid recovery channel 44 is disposed on the rotor fixing block 34, and the residual liquid recovery channel 44 is communicated with the residual liquid recovery groove 43. By such arrangement, the residual liquid falling from the sampling needle 11 can slide from the conical boss 39 to the residual liquid recovery port 42, and flow along the residual liquid recovery groove 43 to the residual liquid recovery channel 44, thereby avoiding biological pollution.

Illustratively, a wear-resistant gasket 45 is disposed between the bottom surface of the rotor and the sealing gasket 27, the wear-resistant gasket 45 is provided with a plurality of upper bosses and a plurality of lower bosses, the lower bosses are inserted in one-to-one correspondence with the first flow holes 30, the upper bosses and the lower bosses located at the same vertical position are mutually communicated to form second flow holes 46, and the first flow holes 30 are communicated with the second flow holes 46 in one-to-one correspondence. From this, wear pad 45 can prevent that sealing washer 27 from wearing and tearing, guarantees not taking place to rotate between wear pad 45 and the sealing washer 27, and the area of contact between rotor assembly 22 and wear pad 45 has been reduced in the setting of last boss simultaneously, reduces the friction.

In this embodiment, the tightness between the rotor assembly 22 and the wear-resistant pad 45 can be adjusted by the screw 35 to ensure a sealed connection of the rotor and the wear-resistant pad 45 during normal rotation of the rotor, and the pre-tightening force between the sealing pad 27 and the stator housing 25 enables the bottom plane of the wear-resistant pad 45 to be closely connected with the sealing pad 27 without leakage during rotation of the rotor.

Illustratively, the flow path plate 24 is provided with a light guide strip 47, a skirt 48 is disposed on the periphery of the bottom of the gear 37, one end of the light guide strip 47 is located below the skirt 48 of the gear 37, and a light through hole 49 is disposed on the skirt 48 and corresponds to the light guide strip 47. Therefore, the light emitted by the infrared light emitter on the sensor arranged on the instrument is received by the sensor through the light guide strip 47 by total reflection and passes through the light through hole 49, namely, the gear 37 is rotated to an initial zero position, and based on the initial zero position, the rotation angle of the gear 37 to other channels can be calculated through the rotation step number of the gear 37, so that the smooth detection of the reagent is ensured; to ensure stable transmission of the optical signal, the light guide bar 47 is transparent, and the gear 37 is opaque black.

In this embodiment, the connector 13 is a sealing rubber plug, and an inner wall of the sealing rubber plug abuts against an outer wall of the sampling needle 11. When the fixed boss 14 is in the first initial gear and the movable boss 15 is in the second initial gear, the sampling frame 1 is communicated with the liquid inlet channel 32 on the distributing valve 2, the sealing rubber plug is deformed under the action of the torsion spring 51 and the pressure spring 9, the push rod 10 can form a sealing cavity with the distributing valve 2, the processing medium can be ensured to be smoothly conveyed into the instrument, biological pollution is prevented, in addition, the sealing rubber plug can scrape residual liquid on the outer wall of the sampling needle 11 to the distributing valve 2 under the action of the pressure spring 9, and the residual liquid enters the instrument along with the processing medium, so that trace residual liquid residue on the sampling needle 11 is avoided, and the detection accuracy is ensured.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between 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.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.

Claims

1. The utility model provides a sampling equipment, its characterized in that, includes sampling frame and distribution valve, the sampling frame sets up the top of distribution valve, the sampling frame rotates with the instrument to be connected, the sampling frame has a plurality of rotation angles of connecting different sample inputs, be equipped with the sampling needle on the sampling frame, the processing chamber intercommunication of sampling needle and instrument is equipped with a liquid outlet and a plurality of feed liquor runner of connecting a plurality of different processing medium inputs on the distribution valve, the distribution valve is used for switching the liquid outlet with arbitrary feed liquor runner's intercommunication, under initial state, the sampling needle is vertical state, the sampling needle with the liquid outlet intercommunication.

2. The sampling device according to claim 1, wherein the sampling frame comprises a housing, a sampling assembly and a cam, the sampling assembly is arranged in the housing, the sampling assembly comprises a rotating shaft, a connecting frame, a sliding block, a pressure spring, a push rod and a sampling needle, the housing is rotationally connected with the cam through the rotating shaft, a guide groove which is in sliding fit with the sliding block is formed in the connecting frame, the pressure spring is arranged in the guide groove, the sliding block is fixedly arranged at one end of the push rod, a connector is arranged at the other end of the push rod, the bottom end of the pressure spring abuts against the sliding block, an avoidance hole is formed in the connecting head, a hollow channel is formed in the rotating shaft, one end of the sampling needle is movably connected with the avoidance hole, the other end of the sampling needle is connected with the hollow channel, a through hole matched with the hollow channel is formed in the cam, a fixing boss is arranged on one surface of the housing, which faces the cam, a movable boss is arranged on one surface of the sliding block, a sliding groove which can slide the movable boss is arranged on the housing, a first straight arc groove, a second straight arc groove and a first straight arc groove are formed in the first straight arc groove and a second straight arc groove.

3. The sampling device of claim 2, wherein a PCB board is disposed on a side of the cam away from the housing, hall sensors are disposed on the PCB board corresponding to the first initial clamping position, the first intermediate clamping position, the first terminal clamping position, the first pumping level and the second pumping level, and magnets are disposed on the fixed boss and the movable boss.

4. The sampling device of claim 2, wherein the sampling assembly further comprises a torsion spring and a torsion spring mounting base, wherein one end of the torsion spring mounting base is rotatably connected with the rear cover, the other end of the torsion spring mounting base is connected with the slider, the torsion spring is mounted on the torsion spring mounting base, one end of the torsion spring is connected with the torsion spring mounting base, and the other end of the torsion spring is connected with the connecting frame.

5. The sampling device according to any one of claims 1 to 4, wherein the distribution valve comprises a stator assembly, a rotor assembly and a flow path plate with a plurality of micro-channels arranged therein, the stator assembly comprises a stator housing, a flow path pipe and a sealing pad, the stator housing is fixedly arranged on the flow path plate, the sealing pad is arranged on the stator housing, the flow path pipe is provided with a plurality of micro-channels, the flow path pipes are arranged in the stator housing and are circumferentially arranged, the lower ends of the flow path pipes are respectively communicated with corresponding micro-channels in the flow path plate, the sealing pad comprises an annular gasket and a plurality of spigots, the bottom surface of the annular gasket abuts against the upper end surface of the flow path pipe, the spigots are provided with a plurality of spigots, the spigots are fixedly arranged at the bottom of the annular gasket and are circumferentially arranged, the spigots are in one-to-one correspondence with the flow path pipe, each micro-channel in the flow path plate is respectively connected with a probe for inputting a processing medium, the flow path pipe, the rotor assembly, the micro-channels and the liquid inlet and the liquid outlet are sequentially communicated with the stator assembly when the rotor assembly is rotatably arranged.

6. The sampling device of claim 5, wherein the rotor assembly comprises a rotor and a rotor fixing block, the rotor is rotatably connected above the stator assembly, the flow path plate and the stator assembly are provided with mounting holes through which a rotor rotating shaft can pass, the rotor and the rotor fixing block are fixedly connected through screws, and the rotor fixing block is rotatably connected to the bottom of the flow path plate as the rotor rotating shaft.

7. The sampling device of claim 6, wherein the rotor comprises a flat plate and a gear, a first cavity is formed in the top surface of the gear, a conical boss is arranged in the center of the first cavity, the liquid outlet is formed in the conical boss, a second cavity is formed in the bottom surface of the gear, and the liquid inlet channel is formed by solder sealing between the flat plate and the second cavity.

8. The sampling device of claim 6, wherein a plurality of residual liquid recovery ports are formed around the conical boss, residual liquid recovery grooves are formed in the flat piece at positions corresponding to the residual liquid recovery ports, residual liquid recovery channels are formed in the rotor fixing block, and the residual liquid recovery channels are communicated with the residual liquid recovery grooves.

9. The sampling device of claim 7, wherein a wear-resistant gasket is arranged between the bottom surface of the rotor and the sealing gasket, the wear-resistant gasket is provided with a plurality of upper bosses and a plurality of lower bosses, the lower bosses are inserted in one-to-one correspondence with the first flow holes, the upper bosses and the lower bosses which are positioned at the same vertical position are mutually communicated to form second flow holes, and the first flow holes and the second flow holes are in one-to-one correspondence.

10. The sampling device of claim 7, wherein a light guide bar is arranged on the flow path plate, a skirt edge is arranged on the periphery of the bottom of the gear, one end of the light guide bar is positioned below the skirt edge of the gear, and a light through hole is arranged on the skirt edge and corresponds to the light guide bar.