CN219013445U

CN219013445U - Sample injection valve and sample injection system

Info

Publication number: CN219013445U
Application number: CN202223357741.4U
Authority: CN
Inventors: 陈伟雄
Original assignee: Xiamen Egux Fluid Control Equipment Co ltd
Current assignee: Xiamen Egux Fluid Control Equipment Co ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-05-12
Anticipated expiration: 2032-12-14

Abstract

The utility model provides a sample injection valve and a sample injection system, wherein the sample injection valve comprises a valve body, an operating assembly, a stator and a rotor; the control assembly is arranged on the valve body and used for controlling the relative movement between the rotor and the stator; the valve body is provided with a plurality of inlets and outlets, the rotor and the stator are correspondingly arranged at the joint of the inlets and the outlets, and the valve body is suitable for selectively switching and communicating the inlets and the outlets through at least one passage formed by matching the rotor and the stator; the stator is provided with a plurality of runner ports, the rotor is provided with a pore canal which can be mutually butted with at least two runner ports, and the pore canal is communicated to the corresponding runner port after the rotor is switched and moved, so that a passage is formed at an inlet and an outlet communicated with the runner ports, and then inlet and outlet sample injection liquid is selected. Therefore, the internal switching component is simplified, the open pore structure in various forms meets the rapid switching requirement of various flow paths, the switching water between the inlet and the outlet can be realized more compactly, the accuracy of switching operation is obviously improved, and the operation and the maintenance are convenient.

Description

Sample injection valve and sample injection system

Technical Field

The utility model relates to the technical field of sample injection control, in particular to a sample injection valve and a sample injection system.

Background

The sampling valve, as the name implies, is a multi-way valve for accurately and quantitatively introducing a sample into a chromatographic system, and is applied to efficient sampling and liquid discharging. The rotary valve, multi-way valve, multi-position valve and the like are commonly called at home, and are mainly divided into manual operation and electric operation modes in the market at present.

The related accessories of the sample injection valve are designed to be of an automatic structure such as an electric structure or a pneumatic structure, and manual operation is needed to be switched in many occasions, especially in sudden switching work, or cleaning work, an automatic control mode is often unfavorable for more flexible and more efficient work and maintenance. Therefore, the automatic switching mode is more convenient to use in batch detection and analysis, but has low flexibility and low operability, and particularly, the automatic switching mode is difficult to meet the requirement of sample injection switching under some non-batch conditions or accidental use conditions. Moreover, the automatic switching liquid inlet valve cannot be used in many specific occasions, for example, a certain condition switch, a disposable switching channel, cleaning maintenance and the like, and a manual switching mode is needed to be used, so that the automatic switching liquid inlet valve is convenient for a user to operate and use.

Therefore, in order to solve various occasions requiring manual liquid switching, a manually operated liquid inlet valve and a fitting structure thereof still need to be introduced. However, the existing manual liquid inlet valve has large valve structure volume, and the configuration of internal structural parts is complex, so that the later maintenance, disassembly and assembly are very inconvenient and the maintenance is troublesome. In addition, the existing manual switching piece is specifically operated on an inner valve core, sample injection and liquid discharge are carried out through waterway switching in the valve core, the fluctuation of the switching process is easily caused, the final liquid discharge is influenced, and the accuracy of sample injection and liquid discharge is reduced.

Disclosure of Invention

Accordingly, the present utility model is directed to a sample injection valve and a sample injection system for solving the above problems.

The utility model adopts the following scheme:

the application provides a sample injection valve, include: a valve body, a steering assembly, a stator and a rotor; the control assembly is arranged on the valve body and used for controlling relative movement between the rotor and the stator; the valve body is provided with a plurality of inlets and outlets, the rotor and the stator are correspondingly arranged at the joint of the inlets and the outlets, and the valve body is suitable for selectively switching and communicating the inlets and the outlets through at least one passage formed by matching the rotor and the stator; the stator is provided with a plurality of runner ports, the rotor is provided with a pore canal which can be mutually butted with at least two runner ports, and the pore canal is communicated with the corresponding runner port after the rotor is switched and moved, so that the passageway is formed at an inlet and an outlet communicated with the runner ports, and then inlet and outlet sample injection liquid is selected.

As a further improvement, the inlet, the outlet, the runner port and the pore canal are positioned at the same section, the inlet and the outlet are correspondingly arranged on the side surface of the valve body, and the runner port and the inlet are opposite to each other.

As a further improvement, the rotor is configured to be axially rotatably penetrated and accommodated inside the stator such that the duct and the runner are on the same horizontal plane.

As a further improvement, the motor rotor comprises a clamping assembly, wherein the clamping assembly comprises a positioning ball arranged on one side of the rotor and a spring piece which is elastically abutted against the positioning ball; the two positioning balls are oppositely arranged on the side face of the end part of the rotor through the spring piece in an abutting mode, a plurality of clamping grooves matched with the positioning balls are correspondingly formed in the inner wall of the valve body, and the clamping grooves are correspondingly arranged with the inlet and the outlet and used for accurately limiting the rotation threshold value of the control assembly on the rotor.

As a further improvement, the control assembly comprises a knob piece rotatably arranged at the end part of the valve body and a transmission shaft linked with the knob piece; the transmission shaft is combined with the rotor to limit, so that the transmission shaft is driven to further trigger the rotor to axially rotate relative to the stator after the knob piece is manually operated.

As a further improvement, a set screw is arranged between the knob piece and the transmission shaft, the end part of the valve body is correspondingly provided with an adapter piece, the stator is arranged on the adapter piece and is accommodated in the valve body, the transmission shaft penetrates through the adapter piece and can rotate relatively freely, and the adapter piece is provided with a nut and a gasket.

As a further improvement, the number of the inlet and the outlet is two, three or four, the number of the runner ports is two, three or four, and the number of the runner ports is not more than the number of the inlet and the outlet.

As a further improvement, the duct is configured to be L-shaped, X-shaped, T-shaped or I-shaped along the cross section of the rotor, which is selectively in communication with the flow port or not.

As a further improvement, the pore canal is provided with at least one or two independent pore canals, and the two pore canals are independently configured to be non-conductive.

The application further provides a sample injection system, which comprises a sample injection pipeline and a sample injection valve arranged on the sample injection pipeline.

By adopting the technical scheme, the utility model can obtain the following technical effects:

1. the sample injection valve is suitable for the use of distributing sample injection liquid during sample injection of an analyzer, so as to provide a switching mode of various flow paths, and further switch the communication and the partition between the inlet and the outlet in an operable mode. The valve body is provided with an inlet and an outlet, the stator is provided with a channel opening, and the rotor is provided with a channel opening, so that the rotor can be switched to move to the channel opening communicated with the corresponding channel opening after being controlled by the control assembly, the inlet and the outlet communicated with the channel opening are conducted, the sample injection liquid between the inlet and the outlet is selected, the internal switching component is simplified through the matching of the stator and the rotor in the valve body, the sample injection valve can be made small, the channel structure formed by the stator and the rotor can meet the rapid switching requirement of various channels, the switching water between the inlet and the outlet can be realized more compactly, the accuracy of switching operation is remarkably improved, and the valve is convenient to use and maintain.

2. In the utility model, the inlet and outlet, the runner port and the pore canal are arranged at the same section to realize the shortest path liquid inlet and outlet arrangement and facilitate the switching layout of the rotor on the stator. The inlet and the outlet are arranged on the side surface of the valve body, so that the sample injection and liquid discharge of the lateral mode of the valve body are correspondingly realized, the rotor and the stator which are sleeved together are more beneficial to compact design between structures, the occupied volume inside the valve body is smaller, and the manufacturing and maintenance cost is lower.

3. According to the utility model, the sample injection valve is further provided with the clamping assembly, the positioning ball of the clamping assembly is abutted to the end part of the rotor through the spring piece and used for being in positioning jogged with the clamping groove on the inner wall of the valve body, the clamping groove can accurately limit the rotation threshold of the rotor so as to form gear type rotation, and the positioning ball can be fed back to a user to rotate in place after sliding into the clamping groove along with the rotation of the rotor, so that the quick and accurate realization of operation switching of the control assembly is facilitated.

4. The knob piece of the control assembly is connected with the rotor through the transmission shaft to limit, so that power is transmitted to the rotor. And the knob piece is in fastening connection with the transmission shaft, the valve body is correspondingly provided with the adapter, the stator is configured on the adapter, and the transmission shaft penetrates through the adapter and is used for being connected with the rotor, so that the rotor is smoother in rotation configuration in the valve body, and interference and energy consumption during rotation are reduced.

5. The number of the inlets and the outlets and the number of the runner ports are mutually related and configured, and a multi-way valve structure of the sample injection valve is correspondingly formed. The number of the runner ports is smaller than or equal to the number of the inlets and the outlets, the use requirement of the multi-way valve is met, and the pore canal is constructed into a plurality of different shape types, so that a multi-way valve switching structure with one inlet and one outlet, multiple inlets and multiple outlets and multiple inlets and multiple outlets is correspondingly formed, and various flow path modes can be flexibly adapted to various application scenes.

Drawings

FIG. 1 is a schematic diagram of a sample injection valve according to an embodiment of the present utility model at a first viewing angle;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic diagram of a sample injection valve according to an embodiment of the present utility model at a second view angle;

FIG. 4 is a cross-sectional view of FIG. 3;

FIG. 5 is a schematic view of a sample injection valve according to an embodiment of the present utility model in a third view, wherein the screw cap is hidden for convenience of illustration;

FIG. 6 is a schematic diagram of a gasket of a sample injection valve according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram of a sample injection valve according to an embodiment of the present utility model at other viewing angles;

FIG. 8 is a schematic diagram of an L-shaped channel of a sample injection valve according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram of a T-shaped channel of a sample injection valve according to an embodiment of the present utility model;

FIG. 10 is a schematic diagram of a channel of a sample injection valve according to an embodiment of the present utility model;

FIG. 11 is a schematic view of an X-shaped channel of a sample injection valve according to an embodiment of the present utility model.

Icon: 1-a valve body; 2-stator; 3-rotor; 4-import and export; 5-a flow port; 6-pore canal; 7-positioning balls; 8-spring members; 9-clamping grooves; 10-a knob member; 11-a transmission shaft; 12-a set screw; 13-an adapter; 14-a nut; 15-a gasket; 16-bump; 17-nut.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

Examples

Referring to fig. 1 to 11, this embodiment provides a sample injection valve, including: a valve body 1, a handling assembly, a stator 2 and a rotor 3. A control assembly is provided on the valve body 1 for controlling the relative movement between the rotor 3 and the stator 2. The valve body 1 is provided with a plurality of inlets and outlets 4, the rotor 3 and the stator 2 are correspondingly arranged at the joint of the inlets and outlets 4, and the valve body is suitable for selectively switching the inlets and outlets 4 through at least one passage formed by matching the rotor 3 and the stator 2. The stator 2 is provided with a plurality of runner ports 5, the rotor 3 is provided with a pore canal 6 which can be mutually butted with at least two runner ports 5, the pore canal 6 is communicated with the corresponding runner port 5 after the rotor 3 is switched to move, so that a passage is formed at an inlet and an outlet 4 communicated with the runner port 5, and then the inlet and the outlet 4 are selected to feed liquid.

The sample injection valve is suitable for distributing sample injection liquid during sample injection of an analyzer so as to provide a plurality of flow path switching modes and further switch the communication and the separation between the inlet and the outlet 4 in an operable mode. The valve body 1 is provided with the inlet and outlet 4, the stator 2 is provided with the channel opening 5, and the rotor 3 is provided with the channel 6, so that the rotor 3 can be switched to move to the channel 6 to be communicated with the corresponding channel opening 5 after being controlled by the control assembly, the inlet and outlet 4 communicated with the channel opening 5 is conducted, the sample injection and liquid outlet between the inlet and outlet 4 are selected, the inner switching member is simplified through the matching of the stator 2 and the rotor 3 in the valve body 1, the sample injection valve can be made small, the channel structure formed by the stator 2 and the rotor 3 has an open pore structure in various forms, the quick switching requirement of various channels can be met, the switching water between the inlet and the outlet 4 can be realized more compactly, the accuracy of the switching operation is obviously improved, and the valve is convenient to use and maintain.

It should be noted that the operation manner of the above-mentioned operation assembly may be manually operated or may be operated by other external mechanisms, which is not limited herein. And in the following is realized in particular by manual operations. And the inlet and outlet 4 is a general name of a sample inlet and outlet, and sample inlet and liquid outlet can be realized at the inlet and outlet 4.

In the embodiment, the inlet and outlet 4, the runner port 5 and the duct 6 are positioned at the same section, the inlet and outlet 4 is correspondingly arranged on the side surface of the valve body 1, and the runner port 5 and the inlet and outlet 4 are opposite to each other. In particular, the rotor 3 is configured to be axially rotatably housed inside the stator 2 so that the duct 6 is on the same level as the duct opening 5. Therefore, the inlet and outlet 4, the channel opening 5 and the channel 6 are arranged at the same section to realize the shortest path liquid inlet and outlet arrangement and facilitate the switching layout of the rotor 3 on the stator 2. The inlet and outlet 4 is arranged on the side surface of the valve body 1, so that the injection and discharge of the lateral mode of the valve body 1 is correspondingly realized, the rotor 3 and the stator 2 which are sleeved together are more beneficial to compact design between structures, the occupied volume of the interior of the valve body 1 is smaller, and the manufacturing and maintenance cost is lower.

In this embodiment, the rotor 3 is accommodated in the stator 2, so as to ensure that the stator 2 can be tightly sleeved on the outer side of the rotor 3 and does not affect the relative movement between the two, and further, the stator 2 is configured to be made of a soft material, so that the rotor 3 can be flexibly covered to maintain the air tightness between the two.

As shown in fig. 2 and 4, in this embodiment, the liquid inlet valve further includes a detent assembly, which includes a positioning ball 7 disposed on one side of the rotor 3, and a spring member 8 elastically abutting against the positioning ball 7. The two positioning balls 7 are oppositely arranged on the side surface of the end part of the rotor 3 in an abutting manner through a spring piece 8, a plurality of clamping grooves 9 matched with the positioning balls 7 are correspondingly formed in the inner wall of the valve body 1, and the clamping grooves 9 and the inlet and outlet 4 are correspondingly arranged for accurately limiting the rotation threshold value of the operating assembly to the rotor 3.

The clamping assembly provided in the above is characterized in that the positioning ball 7 is abutted to the end part of the rotor 3 through the spring member 8 and is used for being in positioning jogged with the clamping groove 9 on the inner wall of the valve body 1, the clamping groove 9 can accurately limit the rotation threshold of the rotor 3 so as to form gear type rotation, and the positioning ball 7 can be fed back to a user to rotate in place after sliding into the clamping groove 9 along with the rotation of the rotor 3, so that the quick and accurate realization of operation switching of the control assembly is facilitated.

As shown in fig. 2 to 7, in the present embodiment, the operating assembly includes a knob member 10 rotatably disposed at an end of the valve body 1, and a transmission shaft 11 linked with the knob member 10. The transmission shaft 11 is engaged with the rotor 3 to limit, so that the transmission shaft 11 is driven to further trigger the rotor 3 to axially rotate relative to the stator 2 after the knob member 10 is manually operated. Specifically, the end of the transmission shaft 11 is in male-female engagement with the rotor 3 to form a limit during rotation.

Wherein, a set screw 12 is arranged between the knob member 10 and the transmission shaft 11, an adapter 13 is correspondingly arranged at the end part of the valve body 1, the stator 2 is arranged on the adapter 13 and is accommodated in the valve body 1, the transmission shaft 11 penetrates through the adapter 13 and can rotate relatively freely, and a nut 14 and a gasket 15 are arranged on the adapter 13. In this embodiment, the adaptor 13 is configured as an adaptor, and is correspondingly screwed on the end of the valve body 1, and is disposed opposite to the knob member 10 at a distance. And the nut 14 is used for fastening and limiting the adapter on the valve body 1, the gasket 15 plays the purposes of skid resistance and buffering, in particular, the gasket 15 is configured to be provided with a plurality of inner ring petal bulges 16, and the bulges 16 are in elastic inclined abutting connection towards the valve body 1 so as to increase the buffering effect between the bulges.

The other end of the valve body 1 is correspondingly provided with a screw cap 17, the screw cap 17 is detachably connected to the valve body 1 in a screwed mode, and the screw cap 17 and the knob 10 are opposite to each other at different ends of the valve body 1. The nut 17 not only can improve the tightness of the valve body 1, but also can directly expose the inside of the valve body 1 after being detached, thereby being convenient for the installation, the use and the maintenance of the clamping component in the clamping groove 9.

As shown in fig. 2 and fig. 8 to 11, the number of the inlet/outlet 4 is two, three or four, the number of the runner ports 5 is two, three or four, and the number of the runner ports 5 is not more than the number of the inlet/outlet 4. And the duct 6 is configured to be L-shaped, X-shaped, T-shaped or I-shaped along the cross section of the rotor 3, which is selectively communicated with or not communicated with the runner port 5. Preferably, the channels 6 have at least one or two separate channels 6, and the two channels 6 are independently configured to be non-conductive to each other.

In the above description, the number of the inlet and outlet ports 4 and the number of the runner ports 5 are mutually related and configured, and the multi-way valve structure of the sample injection valve is correspondingly formed. The number of the runner ports 5 is smaller than or equal to the number of the inlets and the outlets 4, so that the use requirement of the multi-way valve is met, and the pore canal 6 is constructed into a plurality of different shape types, so that a multi-way valve switching structure with one inlet and one outlet, multiple inlets and multiple outlets is correspondingly formed, and various flow path modes can be flexibly adapted to various application scenes.

For example, when the number of the inlet and outlet 4 is two, in this case, a two-way valve structure is adopted, the number of the runner ports 5 can be only two (in this case, one inlet and one outlet). When the number of the inlets and the outlets 4 is three, the three-way valve structure is adopted, and the number of the runner ports 5 is correspondingly two or three. When the number of the inlets and the outlets 4 is four, the four-way valve structure is adopted, and the number of the runner ports 5 is correspondingly two, three or four. And when the number of the channel holes 5 is four and the number of the channel holes 6 is two, the number of the channels is multiple in and multiple out.

In this embodiment, preferably, the number of the inlets and outlets 4 is four, and the number of the fluid ports 5 and the inlets and outlets 4 are four in a one-to-one correspondence, so that the sample injection valve is defined as a four-way valve structure. And, four inlets and outlets 4 are regularly arranged on four circumferential sides of the valve body 1. As shown in fig. 8, the duct 6 is configured to be L-shaped along the cross section of the rotor 3, and at this time, when two ends of the duct 6 are respectively connected with the adjacent flow ports 5 to form a passage, a sample injection and liquid outlet manner of one inlet and one outlet is realized. As shown in fig. 9, the duct 6 is configured to be T-shaped along the cross section of the rotor 3, and when three ends of the duct 6 are respectively connected with the three runner ports 5 to form a passage, a sample injection and liquid outlet mode of one inlet and multiple outlets or multiple inlets and one outlet is realized. As shown in fig. 10, the duct 6 is configured to be I-shaped along the cross section of the rotor 3, and at this time, when two ends of the duct 6 are respectively connected with the opposite runner ports 5 to form a passage, a sample injection and liquid outlet manner of one inlet and one outlet is realized. As shown in fig. 11, the duct 6 is configured to be X-shaped along the cross section of the rotor 3, and at this time, when four ends of two independent ducts 6 are respectively connected with four flow channel ports 5 to form a passage, a multiple-in multiple-out sample injection and liquid outlet mode is realized.

It should be mentioned that the number of the inlets and outlets 4 is four, and the corresponding clamping grooves 9 are correspondingly arranged in four along the direction of the inlets and outlets 4, so that the precise rotation positioning of the rotor 3 in the valve body 1 is realized through the positioning balls 7.

In addition, the embodiment also provides a sample injection system which comprises a sample injection pipeline and a sample injection valve arranged on the sample injection pipeline. The sample injection pipeline can be suitable for various application scenes to improve the diversity of sample injection systems.

The above is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model.

Claims

1. A sample injection valve, comprising: a valve body, a steering assembly, a stator and a rotor; it is characterized in that the method comprises the steps of,

the control assembly is arranged on the valve body and used for controlling relative movement between the rotor and the stator; the valve body is provided with a plurality of inlets and outlets, the rotor and the stator are correspondingly arranged at the joint of the inlets and the outlets, and the valve body is suitable for selectively switching and communicating the inlets and the outlets through at least one passage formed by matching the rotor and the stator;

wherein,,

the stator is provided with a plurality of runner ports, the rotor is provided with a pore canal which can be mutually butted with at least two runner ports, and the pore canal is communicated to the corresponding runner port after the rotor is switched and moved, so that the passageway is formed at the inlet and outlet where the runner ports are communicated, and then the inlet and outlet sample injection liquid is selected.

2. The sample injection valve of claim 1 wherein said inlet and outlet, said flow port and said channel are located in the same cross section, said inlet and outlet being disposed on opposite sides of said valve body, said flow port and inlet being disposed opposite each other.

3. The injection valve of claim 2 wherein the rotor is configured to be axially rotatably disposed through and received within the stator such that the orifice and the flow port are in the same horizontal plane.

4. The sample injection valve of claim 1, further comprising a detent assembly comprising a detent ball disposed on one side of the rotor and a spring member resiliently abutting the detent ball; the two positioning balls are oppositely arranged on the side face of the end part of the rotor through the spring piece in an abutting mode, a plurality of clamping grooves matched with the positioning balls are correspondingly formed in the inner wall of the valve body, and the clamping grooves are correspondingly arranged with the inlet and the outlet and used for accurately limiting the rotation threshold value of the control assembly on the rotor.

5. The sample injection valve of claim 1, wherein the operating assembly comprises a knob member rotatably disposed at an end of the valve body, and a drive shaft coupled to the knob member; the transmission shaft is combined with the rotor to limit, so that the transmission shaft is driven to further trigger the rotor to axially rotate relative to the stator after the knob piece is manually operated.

6. The injection valve of claim 5 wherein a set screw is disposed between the knob member and the drive shaft, an adapter is disposed at the end of the valve body, the stator is disposed on the adapter and is accommodated in the valve body, the drive shaft is disposed through the adapter and is rotatable relative thereto, and a nut and a washer are disposed on the adapter.

7. The sample injection valve of claim 1 wherein said ports are provided in two, three or four, and said ports are not more than said ports.

8. The injection valve of claim 7 wherein said port is configured to be L-shaped, X-shaped, T-shaped or I-shaped along the cross-section of the rotor, which is selectively in communication with the port or out of communication therewith.

9. The injection valve of claim 8 wherein said ports have at least one or two separate ports and are independently configured to be non-conductive to each other.

10. A sample injection system comprising a sample injection line and a sample injection valve according to any one of claims 1 to 9 disposed on the sample injection line.