CN211320047U - But injector of quick replacement probe - Google Patents
But injector of quick replacement probe Download PDFInfo
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- CN211320047U CN211320047U CN201922181523.1U CN201922181523U CN211320047U CN 211320047 U CN211320047 U CN 211320047U CN 201922181523 U CN201922181523 U CN 201922181523U CN 211320047 U CN211320047 U CN 211320047U
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Abstract
The utility model relates to a but injector of quick replacement probe, include first tubular structure and set up the second tubular structure in the pore. The first cylinder structure is internally provided with a pore passage which penetrates through the first cylinder structure, and the pore passage is superposed with the central axis of the first cylinder structure. The first cylinder structure and the second cylinder structure are detachably connected to realize the conversion between the fixed connection and the sliding connection of the first cylinder structure and the second cylinder structure. The probe is characterized in that a guide hole is formed in the second cylinder structure, a clamping rod is arranged in the guide hole, a clamping hole is formed in the clamping rod, a probe can be installed in the clamping hole and can move along the clamping hole, and the second cylinder structure, the guide hole, the clamping rod and the clamping hole are coaxially arranged.
Description
Technical Field
The utility model belongs to the technical field of check out test set, concretely relates to but injector of quick replacement probe.
Background
At present, there are various methods for detecting organic compounds, and among them, the following methods are commonly used:
the first method is realized by means of instruments such as a liquid chromatograph or a gas chromatograph, and based on the detection technology of QuEChERs pretreatment, samples needing to be detected need to be subjected to complex pretreatment steps, for example, the samples are firstly crushed, a solvent is added for extraction, an extracting solution is injected into an activated solid phase extraction column to remove impurities, then a specific eluent is used for eluting an object to be detected, the eluent enters the liquid chromatograph or the gas chromatograph through a filter device for pre-separation of various compounds, and finally enters a mass spectrometer for detection, so that the sensitivity and the accuracy of detection are improved. However, the detection method has the problems of long sample pretreatment and detection analysis time, complex procedure, complex process, low working efficiency, high working strength, high detection cost and the like.
The second method is that a probe is adopted to directly scrape the object to be detected on the surface of a sample, then the object to be detected is inserted into a thermal desorption device for desorption, the desorbed object to be detected forms gas-phase ions after passing through an electrospray ion source, and then the gas-phase ions enter a mass spectrometer for detection. The method is simple, fast, high in efficiency and suitable for on-site instant detection. After the detection is finished, the probe is generally simply burned and cleaned, and the front-end probe needs to be replaced when necessary, and then the next detection is carried out.
The inventors believe that the sample injector used in the second method has the following disadvantages:
the top screw needs to be rotated when the probe is replaced by the existing sample injector, the probe is taken out after the claw head grasping the probe is loosened, and the claw head is screwed after a new probe is replaced. On the one hand, the probe needs to be held by hand for positioning when being replaced, so that the stress deformation and the pollution of the probe are easily caused, and on the other hand, the replacement steps are complicated, and the detection timeliness is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a but injector of quick replacement probe can solve the loaded down with trivial details, easy deformation of step, the pollution scheduling problem of suffering when current injector changes the probe.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a sample injector capable of quickly replacing probes comprises a first cylinder structure and a second cylinder structure arranged in a hole.
The first cylinder structure is internally provided with a pore passage which penetrates through the first cylinder structure, and the pore passage is superposed with the central axis of the first cylinder structure. The first cylinder structure and the second cylinder structure are detachably connected to realize the conversion between the fixed connection and the sliding connection of the first cylinder structure and the second cylinder structure.
The probe is characterized in that a guide hole is formed in the second cylinder structure, a clamping rod is arranged in the guide hole, a clamping hole is formed in the clamping rod, a probe can be installed in the clamping hole and can move along the clamping hole, and the second cylinder structure, the guide hole, the clamping rod and the clamping hole are coaxially arranged.
A plurality of elasticity jack catchs are installed to the one end of pressing from both sides tight pole, the guide hole reciprocating motion can be followed to the elasticity jack catch, the structure of elasticity jack catch is set up to: when the elastic claw extends out of the guide hole, the elastic claw is separated from the probe to realize the free sliding of the probe in the clamping hole; when the elastic claw retracts into the guide hole, the elastic claw can clamp the probe to realize the fixation of the probe in the clamping hole.
Further, the first cylinder structure comprises a first cylinder, the first cylinder is provided with the pore channel, and one end of the second cylinder structure, which is far away from the elastic claw, extends out of the pore channel to receive external driving force.
Further, the second cylinder structure comprises a second cylinder, a through hole penetrating through the second cylinder is formed in the second cylinder, the through hole and the second cylinder are coaxially arranged, one end, close to the elastic clamping jaw, of the second cylinder is fixedly connected with a clamping component, one end, close to the second cylinder, of the clamping component is provided with a groove body, the clamping component is internally provided with the guide hole, and the groove body, the through hole and the guide hole are coaxially arranged;
one end of the clamping rod extends out of the guide hole and extends into the through hole of the second cylinder, one end of the clamping rod extending into the through hole is fixedly connected with the push rod, the other end of the push rod extends out of the second cylinder, the push rod and the clamping rod are coaxially arranged, the cross sectional area of the push rod is larger than that of the clamping rod, a spring is arranged between the push rod and the groove body, and the spring ring sleeve is arranged outside the clamping rod;
the spring is configured to: when the elastic claw extends out of the guide hole, the spring is in a compressed state.
Furthermore, an internal thread is arranged on the inner wall of the first cylinder, an external thread is arranged on the outer wall of the second cylinder, and the internal thread and the external thread are matched for use so as to realize the detachable connection of the first cylinder and the second cylinder;
when the first cylinder is connected with the second cylinder through the threads, the positions of the first cylinder structure and the second cylinder structure are fixed, and when the threads between the first cylinder and the second cylinder are separated from contact, the first cylinder structure and the second cylinder structure can slide relatively.
Furthermore, one end of the first cylinder, which is close to the elastic clamping jaw, is provided with a positioning cylinder, the positioning cylinder is fixedly connected with the first cylinder, and the diameter of the inner cavity of the positioning cylinder is the same as that of the pore channel.
Further, the elastic claws are uniformly arranged along the circumferential direction of the clamping rod.
Furthermore, a circular truncated cone bulge is arranged on the outer side surface of one end, close to the clamping member, of the first cylinder.
Further, the clamping member is connected with the second cylinder through threads, and the guide hole in the clamping member comprises a straight hole and an inverted V-shaped hole which are communicated with each other, and the inverted V-shaped hole is used for accommodating the elastic claw.
The utility model has the advantages that:
(1) the first cylinder structure and the second cylinder structure are detachably connected, so that when the first cylinder structure and the second cylinder structure are fixed, the probe is convenient to replace and the sampling is realized by the probe; when first barrel construction and second barrel construction can the relative slip, be convenient for take the probe of scraping the sample and receive inside first barrel construction, avoid the sample injector to touch other article at the in-process that shifts to cause the pollution.
(2) The arrangement mode that one end of the second cylinder structure, far away from the elastic clamping jaw, extends out of the pore channel is adopted, so that an operator can fix the first cylinder structure with one hand and apply external force to the second cylinder structure with the other hand to complete relative rotation between the second cylinder structure and the first cylinder structure or translation along a set direction.
(3) The elastic clamping jaw is reset when extending out by the spring, when the elastic clamping jaw extends out of the guide hole, the spring is in a compression state, so that the elastic clamping jaw has a tendency of retracting into the guide hole under the condition that the push rod is not stressed, and the probe is clamped.
(4) The detachable connection of the first cylinder and the second cylinder is realized by adopting threads, the first cylinder and the second cylinder can be switched between fixed connection and sliding connection, and the probe can conveniently retract into the first cylinder after sampling is completed.
(5) The boss of the circular truncated cone is matched with the positioning barrel, and the positioning barrel can be inserted into a positioning hole of the heating desorption device to realize positioning when in use, namely the position between the first barrel structure and the heating desorption device is fixed; after the probe is conveniently extended out of the first cylinder, the depth value entering the heating desorption device is fixed and unchanged, the desorption of the heating desorption device on the sample is effectively realized, and the detection accuracy is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is an axonometric view of the overall structure diagram in the embodiment of the present invention;
FIG. 2 is a front view of the overall structure of the embodiment of the present invention;
fig. 3 is a cross-sectional view of the overall structure in an embodiment of the present invention;
fig. 4 is an exploded view of the overall structure in an embodiment of the present invention.
In the figure: 1. a positioning cylinder; 2. a first cylinder; 3. an end cap; 4. a clamping member; 5. a second cylinder; 6. an elastic claw; 7. an inner core; 8. a spring; 9. a push rod; 10. and (4) fixing the cap.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In an exemplary embodiment of the present invention, as shown in fig. 1-8, a sample injector with a probe capable of being replaced quickly includes a first cylinder structure and a second cylinder structure disposed in a channel. The first cylinder structure is internally provided with a pore passage which penetrates through the first cylinder structure, and the pore passage is superposed with the central axis of the first cylinder structure. The first cylinder structure and the second cylinder structure are detachably connected to realize the conversion between the fixed connection and the sliding connection of the first cylinder structure and the second cylinder structure. The probe is characterized in that a guide hole is formed in the second cylinder structure, a clamping rod 6 is arranged in the guide hole, a clamping hole is formed in the clamping rod 6, a probe can be installed in the clamping hole and can move along the clamping hole, and the second cylinder structure, the guide hole, the clamping rod 6 and the clamping hole are coaxially arranged.
A plurality of elastic claws 601 are installed at one end of the clamping rod 6, the elastic claws 601 can reciprocate along the guide holes, and the elastic claws 601 are structured as follows: when the elastic claw 601 extends out of the guide hole, the elastic claw 601 is separated from the probe to realize the free sliding of the probe in the clamping hole; when the resilient jaws 601 are retracted into the guide hole, the resilient jaws 601 can grip the probe to effect the securement of the probe in the gripping hole.
Specifically, the first cylinder structure comprises a first cylinder 2, the first cylinder 2 has the duct therein, and an end of the second cylinder structure, which is far away from the elastic claw 601, extends out of the duct to receive an external driving force.
Specifically, the second tubular structure includes second drum 5, be equipped with the through-hole that runs through self in the second drum 5, the through-hole sets up with second drum 5 is coaxial, the one end and the clamping member 4 fixed connection that second drum 5 is close to elastic claw 601, the one end that clamping member 4 is close to second drum 5 is equipped with the cell body, be equipped with in the clamping member 4 the guiding hole, cell body, through-hole and the coaxial setting of guiding hole.
One end of the clamping rod 6 extends out of the guide hole and into the through hole of the second cylinder 5, one end of the clamping rod 6 extending into the through hole is fixedly connected with the push rod 9, the other end of the push rod 9 extends out of the second cylinder 5, the push rod 9 and the clamping rod 6 are coaxially arranged, the cross section area of the push rod 9 is larger than that of the clamping rod 6, a spring 8 is arranged between the push rod 9 and the groove body, and the spring 8 is annularly sleeved outside the clamping rod 6; the spring 8 is arranged: when the resilient latch 601 extends out of the guide hole, the spring 8 is in a compressed state.
Specifically, one end of the push rod 9 extending out of the first cylinder 2 and one end of the push rod 9 extending out of the second cylinder 5 are connected with a fixing cap 10, and the end cover 3 is sleeved outside the fixing cap 10. The fixing cap is in threaded connection with the push rod, and the end cover is in threaded connection with the fixing cap.
In some embodiments, an inner core 10 is disposed in the clamping hole of the clamping rod 6, the inner core 10 is filled in one end of the clamping hole far away from the elastic claw, the inner core 10 is fixedly connected with the push rod 9, and the inner core 10 can shorten the length of the clamping hole, so that axial positioning can be realized through the blocking of the inner core 10 after the probe clamps the hole.
The inner wall of the first cylinder 2 is provided with an internal thread, the outer wall of the second cylinder 5 is provided with an external thread, and the internal thread is matched with the external thread to realize the detachable connection of the first cylinder 2 and the second cylinder 5. When the first cylinder 2 is connected with the second cylinder 5 through threads, the positions of the first cylinder structure and the second cylinder structure are fixed, and when the threads between the first cylinder 2 and the second cylinder 5 are separated from contact, the first cylinder structure and the second cylinder structure can slide relatively.
Specifically, the internal thread of the first cylinder is arranged at one end, far away from the elastic clamping jaw, in the inner cavity of the first cylinder, and the external thread of the second cylinder comprises one end, far away from the elastic clamping jaw, arranged in the outer side surface of the second cylinder.
Specifically, one end of the first cylinder 2, which is close to the elastic claw 601, is provided with a positioning cylinder 1, the positioning cylinder 1 is fixedly connected with the first cylinder, and the diameter of the inner cavity of the positioning cylinder 1 is the same as that of the pore channel.
In particular, the elastic claws 601 are arranged uniformly along the circumferential direction of the clamping bar 6.
In some embodiments, the number of the elastic claws 601 is three, and in other embodiments, two, four, etc. elastic claws 601 may be used, which can be set by one skilled in the art.
The outer side surface of one end of the first cylinder 2, which is close to the clamping component 4, is provided with a circular truncated cone bulge. The clamping member 4 is in threaded connection with the second cylinder 5, and the guide hole in the clamping member 4 comprises a straight hole and an inverted V-shaped hole which are communicated with each other and are used for accommodating the elastic claw 601.
Specifically, the outer diameter of the circular truncated cone protrusion is larger than that of the positioning cylinder 1, in other embodiments, in the case that the outer diameter of the first cylinder 2 is larger than the diameter of the inlet of the heating desorption device, the circular truncated cone protrusion structure can be eliminated, and the end face of the first cylinder 2 can play a positioning role.
The working principle is as follows: if the probe is to be replaced:
the first cylinder 2 and the second cylinder 5 are fixed together through threaded connection, then the push rod 9 is pushed towards the direction of the elastic claw 601, the elastic claw 601 extends out of the inverted V-shaped hole, then the elastic claw 601 is opened towards the outer side under the action of elasticity, the elastic claw 601 is separated from contact with the probe, and the probe falls off from the clamping rod 6 and the elastic claw 601. The cleaned material is coated on the surface of a new probe to be installed, the probe is inserted into the clamping holes of the elastic clamping jaw 601 and the clamping rod 6, the extrusion on the push rod 9 is released, the spring 8 drives the clamping rod 6 and the elastic clamping jaw 601 to reset, and the new probe is clamped.
When sampling is needed, the first cylinder 2 and the second cylinder 5 are relatively rotated, the first cylinder 2 and the second cylinder 5 are separated from threaded contact, the first cylinder 2 and the second cylinder 5 can slide along the axis of the hole, the push rod 9 is pushed towards the direction of the elastic claw 601, so that the probe extends out of the first cylinder 2, and then scraping of the sample is completed by the probe. The push rod 9 is then pulled in the opposite direction so that the stylet retracts with the second cylinder 5 and is fully retracted into the first cylinder 2.
When the sample is required to be fed, the sample feeder is moved to the heating desorption device, the positioning barrel 1 is inserted into the inlet of the heating desorption device, the circular truncated cone protrusion plays a positioning role, the probe is pushed out by the push rod 9, and after the push rod 9 is pushed to the limit position, the probe reaches the set position in the heating desorption device.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (8)
1. A sample injector capable of quickly replacing probes is characterized by comprising,
the first cylinder structure is internally provided with a pore passage penetrating through the first cylinder structure, and the pore passage is superposed with the central axis of the first cylinder structure;
the first cylinder structure and the second cylinder structure are detachably connected to realize the conversion between fixed connection and sliding connection of the first cylinder structure and the second cylinder structure;
the second cylinder structure, the guide hole, the clamping rod and the clamping hole are coaxially arranged;
a plurality of elasticity jack catchs are installed to the one end of pressing from both sides tight pole, the guide hole reciprocating motion can be followed to the elasticity jack catch, the structure of elasticity jack catch is set up to:
when the elastic claw extends out of the guide hole, the elastic claw is separated from the probe to realize the free sliding of the probe in the clamping hole;
when the elastic claw retracts into the guide hole, the elastic claw can clamp the probe to realize the fixation of the probe in the clamping hole.
2. The sample injector capable of changing probes rapidly as claimed in claim 1, wherein the first cylinder structure comprises a first cylinder having the hole therein, and the second cylinder structure has an end far away from the elastic claw extending out of the hole to receive an external driving force.
3. The sample injector capable of rapidly replacing the probe as claimed in claim 2, wherein the second cylinder structure comprises a second cylinder, a through hole penetrating through the second cylinder is formed in the second cylinder, the through hole is coaxially arranged with the second cylinder, one end of the second cylinder, which is close to the elastic claw, is fixedly connected with a clamping member, one end of the clamping member, which is close to the second cylinder, is provided with a groove body, the clamping member is provided with the guide hole, and the groove body, the through hole and the guide hole are coaxially arranged;
one end of the clamping rod extends out of the guide hole and extends into the through hole of the second cylinder, one end of the clamping rod extending into the through hole is fixedly connected with the push rod, the other end of the push rod extends out of the second cylinder, the push rod and the clamping rod are coaxially arranged, the cross sectional area of the push rod is larger than that of the clamping rod, a spring is arranged between the push rod and the groove body, and the spring ring sleeve is arranged outside the clamping rod;
the spring is configured to: when the elastic claw extends out of the guide hole, the spring is in a compressed state.
4. The sample injector capable of rapidly replacing probes as in claim 3, wherein the first cylinder is provided with internal threads at the inner wall thereof, and the second cylinder is provided with external threads at the outer wall thereof, and the internal threads and the external threads are matched for use to realize the detachable connection of the first cylinder and the second cylinder;
when the first cylinder is connected with the second cylinder through the threads, the positions of the first cylinder structure and the second cylinder structure are fixed, and when the threads between the first cylinder and the second cylinder are separated from contact, the first cylinder structure and the second cylinder structure can slide relatively.
5. The sample injector capable of changing the probe rapidly as claimed in claim 1, wherein a positioning cylinder is arranged at one end of the first cylinder close to the elastic claw, the positioning cylinder is fixedly connected with the first cylinder, and the diameter of the inner cavity of the positioning cylinder is the same as that of the hole.
6. The sample injector for rapid probe change of claim 1, wherein the resilient jaws are uniformly arranged along the circumference of the clamping bar.
7. The sample injector capable of rapidly exchanging probes as claimed in claim 4, wherein the outer side surface of the first cylinder near one end of the clamping member is provided with a circular truncated cone protrusion.
8. The sample injector capable of changing probes rapidly as claimed in claim 7, wherein the clamping member is connected with the second cylinder by screw threads, and the guide hole in the clamping member comprises a straight hole and an inverted V-shaped hole which are communicated with each other, and the inverted V-shaped hole is used for accommodating the elastic claw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922181523.1U CN211320047U (en) | 2019-12-06 | 2019-12-06 | But injector of quick replacement probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922181523.1U CN211320047U (en) | 2019-12-06 | 2019-12-06 | But injector of quick replacement probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211320047U true CN211320047U (en) | 2020-08-21 |
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ID=72080776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922181523.1U Active CN211320047U (en) | 2019-12-06 | 2019-12-06 | But injector of quick replacement probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211320047U (en) |
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2019
- 2019-12-06 CN CN201922181523.1U patent/CN211320047U/en active Active
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