CN212459556U - Electric six-way sample injection valve for chromatographic analysis instrument - Google Patents
Electric six-way sample injection valve for chromatographic analysis instrument Download PDFInfo
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- CN212459556U CN212459556U CN202021792512.3U CN202021792512U CN212459556U CN 212459556 U CN212459556 U CN 212459556U CN 202021792512 U CN202021792512 U CN 202021792512U CN 212459556 U CN212459556 U CN 212459556U
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Abstract
The utility model discloses an electronic six-way sampling valve for chromatographic analysis instrument, including motor, motor connecting plate, detection casing, connecting piece, apron, pivot, valve body, valve barrel, rotor, stator, valve head, plane thrust ball bearing and disc spring subassembly, motor connecting plate, detection casing, apron, valve body, valve barrel and valve head are connected in proper order from back to front, the motor shaft of motor passes through holding screw fixed connection with the connecting piece, the connecting piece passes through the radial cylindric lock and the little end fixed connection of pivot, the main aspects and the rotor rigid coupling of pivot, the stator passes through the cylindric lock to be fixed on the valve head, the rotor realizes the switching of flow path with stator relative rotary slip; the plane thrust ball bearing and the disc spring assembly are arranged inside the valve body. The utility model provides a pair of an electronic six-way sampling valve for chromatographic analysis instrument has improved the design accuracy, prevents sample weeping, cluster liquid, and the action is sensitive simultaneously, advances kind accuracy height.
Description
Technical Field
The utility model relates to an analytical instrument field, concretely relates to electronic six-way sampling valve for chromatographic analysis instrument.
Background
The chromatographic analysis technology is widely applied to a plurality of fields of medicine and health, disease monitoring, livestock and poultry quarantine, food health and safety, environmental monitoring, other industrial and agricultural quality detection and the like, and is most commonly used in various environmental pollution analysis. With the rapid increase of analysis and test requirements of food, medicine, environmental detection and the like, particularly the increase of on-line test requirements, the development of chromatographic analysis instruments in the direction of automation and intellectualization is also promoted. The sample injection valve is one of the key components for liquid injection of analytical instruments, and particularly in the field of chromatographic analysis, the sample injection valve is used for feeding a sample into a mobile phase of a high-pressure liquid flow or for flushing different component parts or for switching among a plurality of separation systems. The sample injection valve is used as an important component of a chromatographic analysis device, and the design and manufacturing precision, the automation degree and the reliability of the sample injection valve directly influence the analysis result. The prior sample injection valve generally has the following problems: 1. in the sample introduction process, due to the factors such as unreasonable structural design or poor sealing, the pressure resistance is poor, and the phenomena of liquid leakage and liquid mixing occur; 2. when the conventional sample injection valve is used, the action sensitivity is poor, and sample injection failure is often caused by the fact that the valve is not cut.
Therefore, the invention aims to solve the technical problem of how to design the electric six-way sample injection valve for the chromatographic analysis instrument, which has the advantages of good sealing performance, liquid leakage prevention, long service life and high reliability.
Disclosure of Invention
The utility model aims at solving the problem in the background art and providing an electric six-way sampling valve for a chromatographic analysis instrument. The utility model provides a pair of an electronic six-way sampling valve for chromatographic analysis instrument has improved the design accuracy, prevents sample weeping, cluster liquid, and the action is sensitive simultaneously, advances kind accuracy height, longe-lived and reliability height.
The above technical purpose of the present invention is achieved by the following technical solutions:
an electric six-way sample injection valve for a chromatographic analysis instrument comprises a motor, a motor connecting plate, a detection shell, a connecting piece, a cover plate, a rotating shaft, a valve body, a valve barrel, a rotor, a stator, a valve head, a plane thrust ball bearing and a disc spring assembly, wherein the motor, the motor connecting plate, the detection shell, the cover plate, the valve body, the valve barrel and the valve head are sequentially connected from back to front;
the plane thrust ball bearing and the dish spring subassembly set up inside the valve body, plane thrust ball bearing cover is located in the pivot of being close to apron one end, dish spring subassembly one end butt in plane thrust ball bearing, other end butt in the main aspects step face of pivot.
The electric six-way sample injection valve for the chromatographic analysis instrument is characterized in that a position detection sheet is fixedly arranged on the connecting piece, a photoelectric switch is arranged in the detection shell, and the position detection sheet is matched with the photoelectric switch to detect the rotation angle and direction of the motor.
The electric six-way sample injection valve for the chromatographic analysis instrument is characterized in that the detection shell is fixedly connected with the motor connecting plate through bolts.
The electric six-way sample injection valve for the chromatographic analysis instrument is characterized in that the detection shell is matched and rotatably connected with the connecting piece through the deep groove ball bearing, the outer ring of the deep groove ball bearing is matched with the inner hole of the detection shell, and the inner ring of the deep groove ball bearing is sleeved on the connecting piece.
The electric six-way sample injection valve for the chromatographic analysis instrument is characterized in that the rotor is connected with the stator in a sealing manner, and the stator is connected with the valve head in a sealing manner.
The electric six-way sample injection valve for the chromatographic analysis instrument is provided with a dynamic sealing structure for switching flow paths between the rotor and the stator.
According to the electric six-way sample injection valve for the chromatographic analysis instrument, the rotor is positioned and connected with the large end of the rotating shaft through the cylindrical pin.
The electric six-way sample injection valve for the chromatographic analysis instrument is characterized in that the front end of the valve head is provided with six flow ports connected with a flow path.
The electric six-way sample injection valve for the chromatographic analysis instrument is characterized in that the disc spring assembly is formed in the form of a stack of annular spring elements, and the disc spring assembly interacts with the rotating shaft and the planar thrust ball bearing to provide supporting pressing force for the rotating shaft.
Compared with the prior art, the utility model has the advantages of it is following and beneficial effect:
1. the utility model provides a pair of an electronic six-way sampling valve for chromatographic analysis instrument rotates through the motor shaft of control motor, drives the pivot and rotates, the six-way stator passes through the cylindric lock to be fixed on the valve head, and the pivot drives six-way rotor and six-way stator and rotates relatively, has realized the switching of liquid flow path, the utility model provides a high design precision prevents sample weeping, cluster liquid, and the action is sensitive simultaneously for advance the appearance accuracy height, the utility model discloses a each parts cooperation is difficult to damage, has improved the wearability, realizes long-life.
2. The utility model provides a pair of an electronic six-way sampling valve for chromatographic analysis instrument, inside planar thrust ball bearing and the dish spring subassembly of being provided with of valve body, dish spring subassembly and pivot, planar thrust ball bearing interact provide the pivot and support the packing force, and then compress tightly the rotor, realize the dynamic seal of rotor and stator.
3. The utility model provides a pair of an electronic six-way sampling valve for chromatographic analysis instrument, the fixed position detection piece that is provided with on the connecting piece, the inside that detects the casing is provided with photoelectric switch, the position detection piece detects motor turned angle and direction with the photoelectric switch cooperation, then can accurate control motor turned angle and direction through control module and photoelectric switch to realize flow path switching control's high accuracy and high sensitivity.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art, and it is obvious that the following description is only one embodiment of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a three-dimensional structure of an electric six-way sampling valve for a chromatographic analyzer according to the present invention;
FIG. 2 is a schematic diagram of a cross-sectional structure of an electric six-way sampling valve for a chromatography apparatus according to the present invention;
fig. 3 is the utility model discloses a valve head structure schematic diagram of an electronic six-way sample injection valve for chromatographic analysis instrument.
1-a motor; 2, connecting a motor plate; 3-detecting the shell; 4-position detection sheet; 5-a connector; 6-cover plate; 7-a rotating shaft; 8-a rotor; 9-a stator; 10-a valve head; 11-deep groove ball bearings; 12-a planar thrust ball bearing; 13-disc spring assembly, 14-flow opening, 15-valve body, 16-valve barrel.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained without creative work by the ordinary skilled person in the art all belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
Referring to fig. 1 to 3, an electric six-way sample injection valve for a chromatography apparatus comprises a motor 1, a motor connecting plate 2, a detection shell 3, a connecting piece 5, a cover plate 6, a rotating shaft 7, a valve body 15, a valve cylinder 16, a rotor 8, a stator 9, a valve head 10, a plane thrust ball bearing 12 and a disc spring assembly 13, the motor 1, the motor connecting plate 2, the detection shell 3, the cover plate 6, the valve body 15, the valve cylinder 16 and the valve head 10 are sequentially connected from back to front, the motor shaft of the motor 1 is fixedly connected with the connecting piece 5 through a set screw, the rotating shaft 7 comprises a big end and a small end, the connecting piece 5 is fixedly connected with the small end of the rotating shaft 7 through a radial cylindrical pin, the large end of the rotating shaft 7 is fixedly connected with the rotor 8, the stator 9 is fixed on the valve head 10 through a cylindrical pin, and the rotor 8 and the stator 9 rotate and slide relatively to realize the switching of a flow path; the plane thrust ball bearing 12 and the dish spring subassembly 13 set up inside valve body 15, plane thrust ball bearing 12 cover is located on the pivot 7 that is close to apron 6 one end, dish spring subassembly 13 one end butt in plane thrust ball bearing 12, the other end butt in the big end step face of pivot 7.
When the six-way valve is used, the motor shaft of the motor 1 is controlled to rotate to drive the rotating shaft 7 to rotate, the six-way stator 9 is fixed on the valve head 10 through the cylindrical pin, and the rotating shaft 7 drives the six-way rotor 8 and the six-way stator 9 to rotate relatively, so that the switching of a liquid flow path is realized; the valve body 15 is internally provided with a plane thrust ball bearing 12 and a disc spring assembly 13, and the disc spring assembly 13 interacts with the rotating shaft 7 and the plane thrust ball bearing 12 to provide supporting pressing force for the rotating shaft 7, so that the rotor 8 is pressed, and the dynamic sealing of the rotor 8 and the stator 9 is realized. The design precision has been improved in each part cooperation in this embodiment, prevents sample weeping, cluster liquid, and the action is sensitive simultaneously for it is high to advance the appearance accuracy.
Preferably, a position detection piece 4 is fixedly arranged on the connecting piece 5, a photoelectric switch is arranged in the detection shell 3, and the position detection piece 4 is matched with the photoelectric switch to detect the rotation angle and the direction of the motor 1. Then, the rotation angle and direction of the motor 1 can be accurately controlled through the control module and the photoelectric switch, and high precision and high sensitivity of flow path switching control are further realized.
Preferably, the detection housing 3 is fixedly connected with the motor connecting plate 2 through bolts.
Preferably, the detection housing 3 is rotatably connected with the connecting piece 5 through the deep groove ball bearing 11 in a matched manner, the outer ring of the deep groove ball bearing 11 is matched with the inner hole of the detection housing 3, and the inner ring of the deep groove ball bearing 11 is sleeved on the connecting piece 5.
Preferably, the rotor 8 and the stator 9, and the stator 9 and the valve head 10 are all connected in a sealing manner.
Preferably, a dynamic seal structure for switching flow paths is provided between the rotor 8 and the stator 9.
Preferably, the rotor 8 and the large end of the rotating shaft 7 are positioned and connected through a cylindrical pin.
Preferably, the front end of the valve head 10 is provided with six flow ports 14 connected to the flow path.
Preferably, the disc spring assembly 13 is formed in the form of a stack of annular spring members, and the disc spring assembly 13 interacts with the rotating shaft 7 and the flat thrust ball bearing 12 to provide support pressing force for the rotating shaft 7.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The electric six-way sample injection valve for the chromatographic analyzer is characterized by comprising a motor (1), a motor connecting plate (2), a detection shell (3), a connecting piece (5), a cover plate (6), a rotating shaft (7), a valve body (15), a valve barrel (16), a rotor (8), a stator (9), a valve head (10), a plane thrust ball bearing (12) and a disc spring assembly (13), wherein the motor (1), the motor connecting plate (2), the detection shell (3), the cover plate (6), the valve body (15), the valve barrel (16) and the valve head (10) are sequentially connected from back to front, a motor shaft of the motor (1) is fixedly connected with the connecting piece (5) through a set screw, the rotating shaft (7) comprises a big end and a small end, the connecting piece (5) is fixedly connected with the small end of the rotating shaft (7) through a radial cylindrical pin, the big end of the rotating shaft (7) is fixedly connected with the rotor (8), the stator (9) is fixed on the valve head (10) through a cylindrical pin, and the rotor (8) and the stator (9) rotate and slide relatively to realize the switching of a flow path;
plane thrust ball bearing (12) and dish spring subassembly (13) set up inside valve body (15), plane thrust ball bearing (12) cover is located and is close to pivot (7) of apron (6) one end, dish spring subassembly (13) one end butt in plane thrust ball bearing (12), other end butt in the big end step face of pivot (7).
2. The electric six-way sample injection valve for the chromatographic analysis instrument is characterized in that a position detection sheet (4) is fixedly arranged on the connecting piece (5), a photoelectric switch is arranged inside the detection shell (3), and the position detection sheet (4) is matched with the photoelectric switch to detect the rotation angle and direction of the motor (1).
3. The electric six-way sample injection valve for the chromatographic analysis instrument according to claim 2, wherein the detection shell (3) is fixedly connected with the motor connecting plate (2) through bolts.
4. The electric six-way sample injection valve for the chromatographic analysis instrument is characterized in that the detection housing (3) is in matched and rotary connection with the connecting piece (5) through a deep groove ball bearing (11), the outer ring of the deep groove ball bearing (11) is matched with the inner hole of the detection housing (3), and the inner ring of the deep groove ball bearing (11) is sleeved on the connecting piece (5).
5. The electric six-way sample injection valve for the chromatographic analysis instrument according to claim 2, wherein a sealing connection is formed between the rotor (8) and the stator (9), and between the stator (9) and the valve head (10).
6. The electric six-way sample injection valve for the chromatographic analysis instrument according to claim 5, characterized in that a dynamic sealing structure for switching flow paths is arranged between the rotor (8) and the stator (9).
7. The electric six-way sample injection valve for the chromatographic analysis instrument is characterized in that the rotor (8) and the large end of the rotating shaft (7) are positioned and connected through a cylindrical pin.
8. An electrically operated six-way sample injection valve for a chromatography apparatus according to claim 1, wherein the front end of the valve head (10) is provided with six ports (14) connected to the flow path.
9. An electric six-way sample injection valve for a chromatographic analysis instrument according to claim 1, characterized in that the disc spring assembly (13) is formed as a stack of annular spring elements, and the disc spring assembly (13) interacts with the rotating shaft (7) and the planar thrust ball bearing (12) to provide a supporting pressing force to the rotating shaft (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021792512.3U CN212459556U (en) | 2020-08-25 | 2020-08-25 | Electric six-way sample injection valve for chromatographic analysis instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021792512.3U CN212459556U (en) | 2020-08-25 | 2020-08-25 | Electric six-way sample injection valve for chromatographic analysis instrument |
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| Publication Number | Publication Date |
|---|---|
| CN212459556U true CN212459556U (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021792512.3U Active CN212459556U (en) | 2020-08-25 | 2020-08-25 | Electric six-way sample injection valve for chromatographic analysis instrument |
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| Country | Link |
|---|---|
| CN (1) | CN212459556U (en) |
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2020
- 2020-08-25 CN CN202021792512.3U patent/CN212459556U/en active Active
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