CN210982354U - Oil chromatogram gas sample injector - Google Patents

Abstract

The utility model relates to an oil chromatogram gas appearance injector, connect guider including injector operating handle and chromatograph introduction port, injector operating handle mainly comprises casing and the built-in syringe and the electromagnetic force drive arrangement of locating the casing, built-in syringe includes the injection tube, locate the syringe needle of injection tube front end and locate the piston push rod in the injection tube, electromagnetic force drive arrangement is connected with piston push rod, in order to drive its seesaw, the syringe needle is worn out from injector operating handle front end export, chromatograph introduction port connects guider including installing the introduction port connection direction male head at the chromatograph introduction port and installing the introduction port connection direction female head at injector operating handle front end export, with the location direction syringe needle, make its and the quick accurate connection of chromatograph introduction port. The device has not only improved the degree of automation that oil chromatogram gas appearance was injected, can carry out gas appearance fast, accurately and inject into, and it is convenient to use moreover, and the range of application is wide.

Description

Oil chromatogram gas sample injector

Technical Field

The utility model relates to an experimental field of electric power oil chromatogram, concretely relates to oil chromatogram gas appearance injector.

Background

In the power oil chromatography test work, the measured gas sample separated from the insulating oil is injected into the operation link of the gas chromatograph, and the accuracy of the oil chromatography test result is directly related.

The gas sample injection mode of the conventional oil chromatographic test is that a tester uses a 1m L glass syringe with a sample inlet needle to manually and rapidly pull and push out a syringe core for twenty times, uses air to 'clean' the interior of the syringe, then inserts the syringe with air exhausted into a 5m L syringe filled with the gas sample to be tested, accurately extracts 1m L of the gas sample to be tested, pinches the syringe core, then rapidly inserts the syringe needle into a sample inlet of a chromatograph, and rapidly pushes the syringe core to be tested into the chromatograph by using fingers to complete the injection operation.

This mode of operation makes the accuracy of the oil chromatography test completely dependent on the individual perception and reaction speed of the test person. Because the inside of the chromatograph still has the carrier gas pressure of 0.4Mpa, the injection port is sealed by a silica gel pad. During the injection process of the gas sample, a tester needs to accurately insert the syringe needle into the sample inlet and pierce the silica gel pad to inject the gas sample. In the injection process, if the needle is pricked to be deviated, the force is not uniform or the operation is slightly delayed, the needle of the injector is pricked to be deviated and bent, the core of the injector is jacked to fly by the pressure of carrier gas, the injection speed is inconsistent, the gas sample is lost and other sample injection faults occur very easily, and the detection accuracy of the oil chromatography test is seriously influenced.

Therefore, it is necessary to develop a special gas sample injector for electrical insulation oil chromatography test to solve the above problems.

Disclosure of Invention

An object of the utility model is to provide an oil chromatogram gas sample injector, the device have not only improved the degree of automation that oil chromatogram gas sample injected, can carry out gas sample injection fast, accurately, and it is convenient to use moreover, and the range of application is wide.

In order to achieve the above object, the utility model adopts the following technical scheme: an oil chromatogram gas sample injector comprises an injector operating handle and a chromatograph sample inlet connection guiding device, wherein the injector operating handle mainly comprises a shell, a built-in injector and an electromagnetic force driving device, the built-in injector comprises an injection tube, a sample injection needle arranged at the front end of the injection tube and a piston push rod arranged in the injection tube, the electromagnetic force driving device is connected with the piston push rod of the built-in injector to drive the front and back movement of the built-in injector, the sample injection needle penetrates out from the front end outlet of the injector operating handle, the chromatograph sample inlet connection guiding device comprises a sample inlet connection guiding male head and a sample inlet connection guiding female head which can be mutually matched and connected, the sample inlet connection guiding male head is arranged on the chromatograph sample inlet, the sample inlet connection guiding female head is arranged at the front end outlet of the injector operating handle to position the sample injection needle, so that the sample inlet of the chromatograph is quickly and accurately connected with the sample inlet of the chromatograph.

Further, the electromagnetic force driving device comprises a transmission connecting rod, an injector tail connector, an upper driving electromagnet and a lower driving electromagnet, the transmission connecting rod is connected with the rear end of a piston push rod of the built-in injector through the injector tail connector, the upper driving electromagnet and the lower driving electromagnet are oppositely arranged on the upper side and the lower side of the transmission connecting rod, driving pole plates capable of being attracted by the upper driving electromagnet and the lower driving electromagnet are respectively arranged on the upper portion and the lower portion of the transmission connecting rod, the upper driving electromagnet and the lower driving electromagnet are respectively electrically connected with a control device to be electrified to generate magnetic force, and the transmission connecting rod is driven to move up and down through attracting the corresponding driving pole plates, so that the piston push rod is driven to move back and forth through the injector tail.

Furthermore, a driving device sliding groove used for guiding the up-and-down movement of the transmission connecting rod is arranged in the shell of the operating handle of the injector, and an idler wheel is hinged to the edge of the driving polar plate, which is in contact with the driving device sliding groove, so that the friction force is reduced.

Furthermore, the upper and lower driving electromagnets are mounted on the driving device sliding groove, and the mounting positions can be adjusted up and down to adapt to different sample injection amounts.

Furthermore, a photoelectric position sensor is arranged beside the front end of the injection tube and electrically connected with the control device, so that the upper driving electromagnet is not electrified when the infrared light is blocked by the piston push rod, and the upper driving electromagnet is electrified when the infrared light is switched on to attract the driving polar plate to drive the transmission connecting rod to move upwards.

Further, the guiding device is connected to the chromatograph inlet and is equipped with into appearance trigger micro-gap switch on the female head of inlet connection direction, advance appearance trigger micro-gap switch and can be connected the male head of direction and trigger by the inlet connection when the male head of inlet connection direction is connected with the female head cooperation of inlet connection direction, advance appearance trigger micro-gap switch and controlling means electric connection to when advancing kind trigger micro-gap switch and being triggered, make down the drive electro-magnet and get electricity, attract the drive polar plate to drive the drive connecting rod downstream.

Furthermore, the sample inlet connecting and guiding female head mainly comprises a telescopic positioning sheath, a guide ring and an expansion positioning spring, wherein the telescopic positioning sheath is a cone-shaped multi-layer nested structure with a guide through hole in the middle, one end of the telescopic positioning sheath is fixed on an outlet at the front end of an operating handle of the injector, the other end of the telescopic positioning sheath is connected with the guide ring, the expansion positioning spring is arranged in the cone-shaped multi-layer nested structure and is used for expanding the front part of the nested structure to enable the front part of the nested structure to be always kept in a direction parallel to a sample injection needle head, a needle outlet hole is arranged in the middle of the; the public head of introduction port connection direction mainly comprises seal base and guide bar, the seal base lower extreme is installed on the chromatograph introduction port, and the upper end is connected with the guide bar, the guide bar suits with the guiding hole to make the public head of introduction port connection direction and the female head cooperation of introduction port connection direction be connected.

Furthermore, a fixing clamping groove for positioning the built-in injector is formed in the shell, and a transparent observation window is formed in the surface of the shell so as to observe the condition of the built-in injector.

Compared with the prior art, the utility model discloses following beneficial effect has: the function of automatically injecting the measured gas sample into the chromatograph in the oil chromatography test is realized, the manual sample injection misoperation of the oil chromatography can be avoided to the greatest extent by applying the device, the error of the oil chromatography test is effectively reduced, the accuracy of the oil chromatography test is improved, and the misjudgment is avoided. Meanwhile, the device can also standardize the operation flow of the oil chromatography test and reduce the operation difficulty of the oil chromatography test. The device has the advantages that the electromagnetic force attraction driving design ensures that the operation speed of injecting the gas sample is basically consistent with the conventional manual sample injection, ensures that the volume of the injected measured gas sample is also basically consistent, avoids the phenomenon of gas sample loss caused by 'recoil' of carrier gas pressure, and reduces the repeatability deviation caused by sample injection. And the design of the chromatograph sample inlet connection guiding device adopted by the device effectively solves the problem of sample introduction error caused by easy pricking of the sample introduction needle head. Meanwhile, the problems of mutual interference and pollution of different sample residues are solved by automatically controlling the cleaning function. This device installation convenient to use does not change original operation flow, does not carry out any destructive transformation to oil chromatograph, does not change oil chromatograph appearance performance, can realize generally on various oil chromatograph, and very suitable for uses in electric power oil chromatogram is experimental, has very strong practicality and wide application prospect.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is an external view of an embodiment of the present invention.

Fig. 3 is a schematic view of a usage status of the embodiment of the present invention.

In the figure, 1-an injector operating handle, 101-a fixed clamping groove, 102-a driving device sliding groove, 103-an observation window, 104-a shell, 2-a control device, 3-a control signal line, 4-a chromatograph sample inlet connecting and guiding device, 401-a sample inlet connecting and guiding female head, 4011-a telescopic positioning sheath, 4012-a guide ring, 4013-an expansion positioning spring, 402-a sample inlet triggering micro switch, 403-a sample inlet connecting and guiding male head, 4031-a guide rod, 4032-a sealing base, 5-a gas chromatograph, 501-a chromatograph sample inlet, 6-a built-in injector, 601-a piston push rod, 602-a sample inlet needle, 603-a syringe, 7-an optoelectronic position sensor, 8-an electromagnetic force driving device and 801-a driving electromagnet, 802-drive pole plate, 803-roller, 804-drive connecting rod, 805-injector tail connector and 806-lower drive electromagnet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The utility model provides an oil chromatogram gas appearance injector, it adopts the electromagnetic force forward and reverse attraction drive principle, utilizes the piston push rod of the built-in syringe of electromagnetic force drive, accomplishes operations such as "washing", gas appearance shift, the automatic injection of gas appearance before experimental to the realization will be surveyed the automatic injection of gas appearance and carry out the purpose that detects in the oil chromatograph.

The utility model discloses an oil chromatogram gas sample injector, as shown in fig. 1, 2, 3, including injector operating handle 1 and chromatograph introduction port connection guider 4, injector operating handle 1 mainly comprises casing 104 and the built-in syringe 6 and the electromagnetic force drive device 8 that locate in casing 104, the built-in syringe 6 includes injection tube 603, locates syringe needle 602 and the piston push rod 601 that locates in the injection tube of injection tube 603 front end, electromagnetic force drive device 8 is connected with the piston push rod 601 of built-in syringe 6 to drive its fore-and-aft movement, syringe needle 602 wears out from injector operating handle 1 front end outlet, chromatograph introduction port connection guider 4 includes the introduction port connection direction male head 403 and the introduction port connection direction female head 402 that can mutually support the connection, introduction port connection direction male head 403 is installed on chromatograph introduction port 501, the sample inlet connection guide female head 402 is installed at the outlet of the front end of the injector operating handle 1 to position and guide the sample injection needle 602, so that the sample injection needle is quickly and accurately connected with the sample inlet 501 of the chromatograph.

The electromagnetic force driving device 8 comprises a transmission connecting rod 804, an injector tail connector 805, an upper driving electromagnet 801 and a lower driving electromagnet 806, the transmission connecting rod 804 is connected with the rear end of a piston push rod 601 of the built-in injector 6 through the injector tail connector 805, the upper driving electromagnet 801 and the lower driving electromagnet 806 are oppositely arranged on the upper side and the lower side of the transmission connecting rod 804, the upper portion and the lower portion of the transmission connecting rod 804 are respectively provided with a driving pole plate 802 capable of being sucked by the upper driving electromagnet and the lower driving electromagnet, the upper driving electromagnet and the lower driving electromagnet are respectively electrically connected with a control device 2 through a control signal wire 3 so as to electrify the upper driving electromagnet 801 and the lower driving electromagnet 806 to generate magnetic force, and the transmission connecting rod 804 is driven to move up and down by attracting the corresponding driving pole plate 802, so that the piston push rod 601 is driven to move.

The inside of the casing 104 of the injector operating handle 1 is provided with a driving device sliding groove 102 for guiding the up-and-down movement of the transmission connecting rod 804, and the edge of the driving pole plate 802 contacting with the driving device sliding groove 102 is hinged with a roller 803 to reduce the friction force of the relative movement. The upper driving electromagnet 801 and the lower driving electromagnet 806 are both mounted on the driving device chute 102, and the mounting positions can be adjusted up and down to adapt to different sample volumes. The shell 104 is also internally provided with a fixed clamping groove 101 for positioning the built-in injector 6, and the surface of the shell is provided with a transparent observation window 103 for observing the condition of the built-in injector 6.

A photoelectric position sensor 7 is arranged beside the front end of the injection tube 603, the photoelectric position sensor 7 is electrically connected with the control device 2 through a control signal line 3, so that when infrared light is blocked by the piston push rod 601, the control device 2 controls the upper driving electromagnet 801 not to be electrified, and when the infrared light is switched on, the control device 2 controls the upper driving electromagnet 801 to be electrified, and the driving polar plate 802 is attracted to drive the transmission connecting rod 804 to move upwards.

Chromatograph introduction port connection guider 4 is equipped with the introduction and triggers micro-gap switch 402 on introduction port connection direction female head 401, the introduction triggers micro-gap switch 402 and can be triggered by introduction port connection direction male head 403 when introduction port connection direction male head 403 is connected with the introduction port connection direction female head 401 cooperation and is connected, the introduction triggers micro-gap switch 402 through control signal line 3 and 2 electric connection of controlling means to when introduction triggers micro-gap switch 402 and is triggered, drive electro-magnet 806 gets electricity under controlling means 2, attracts drive polar plate 802 to drive connecting rod 804 downstream. Specifically, female head 401 of direction is connected to the introduction port mainly comprises flexible location sheath 4011, guide ring 4012 and expansion positioning spring 4013, flexible location sheath 4011 has the cone shape multilayer intussusception structure of guide through-hole for the middle part, and one end is fixed on the export of injector operating handle 1 front end, and the other end is connected with guide ring 4012, expansion positioning spring 4013 locates in the cone shape multilayer intussusception structure for the front portion of expansion intussusception structure makes it remain throughout with introduction syringe needle 602 parallel direction, the guide ring middle part is equipped with out the pinhole, and the side is equipped with the guiding hole. The male head 403 of injection port connection guide mainly comprises sealed base 4032 and guide bar 4031, sealed base 4032 lower extreme is installed on chromatograph inlet 501, and the upper end is connected with guide bar 4031, guide bar 4031 suits with the guiding hole to make the male head 403 of injection port connection guide and the female head 401 of injection port connection guide cooperate and be connected.

In this embodiment, the casing 104 of the operating handle of the injector is made of PVC material, and is mainly used for holding and mounting the components of the injector during sample injection.

The built-in injector 6 is a conventional 1m L blue core glass injector, a blue opaque glass piston push rod is arranged in the built-in injector, and a #5 sample injection needle with the length of 50mm is arranged at the front end of the built-in injector and is used for storing and injecting an oil chromatography gas sample.

The upper driving electromagnet 801 and the lower driving electromagnet 806 both adopt 24V direct current sucker type electromagnets and 12N attraction force to generate electromagnetic force to attract driving pole plates on the transmission connecting rod and drive the transmission connecting rod to move up and down.

The transmission connecting rod is in an I shape, the upper part and the lower part of the I shape are respectively an iron disc 802 with the diameter of 15mm, the edge of the disc is attached with a plurality of small rollers 803, a T-shaped metal rod 804 is welded in the middle of the two discs, and the T-shaped metal rod is connected with a connector 805 at the tail part of the injector, so that the piston push rod 601 can synchronously move with the driving polar plate 802.

The injector tail connector 805 is a semi-concave cylinder with the diameter of 12mm welded on a T-shaped metal rod 804, a concave part of the cylinder is sleeved on the tail of the piston push rod 601, and the side of the cylinder is punched to fasten the tail of the piston push rod by using a self-tapping bolt.

The photoelectric position sensor 7 is composed of a miniature infrared light emitter and a photosensitive receiver, which are oppositely embedded on the outer walls of two sides of the front end of the built-in injector 6 and mainly provide an action signal for the upper driving electromagnet 801. when the piston push rod 601 is at the 'injection completion' position, infrared light of the sensor 7 is blocked by the piston push rod 601, the upper driving electromagnet 801 is not electrified, when a detected gas sample is transferred into the built-in injector 6, the piston push rod 601 is pushed to move by the pressure of the detected gas sample, infrared light of the sensor 7 is switched on, and the upper driving electromagnet 801 is electrified to attract the driving pole plate 802 to move upwards, so that the gas sample can be smoothly transferred into the built-in injector 6 from the 5m L gas sample injector.

The sample inlet connection guide male head 403 is made of stainless steel materials according to the specification of a sample inlet of a chromatograph, the lower part of the sample inlet connection guide male head is a sealing base 4032, and a sealing silica gel pad is placed inside the sample inlet connection guide male head and is installed on a sample inlet 501 of the chromatograph for sealing the sample inlet. The upper part of the sealing base 4032 is provided with a circular platform with the diameter of 30mm, the circular platform is provided with four stainless steel guide rods 4031 with the length of 20mm and the diameter of 2mm according to diagonal distribution respectively, and the guide rods are used for guiding the injector sample injection needle 602 to move forwards according to a correct motion track and be inserted into the sample injection port 501 of the chromatograph, so that the needle is prevented from being pricked and deflected during sample injection.

In the female head 401 of direction is connected to the introduction port, flexible location sheath 4011 middle part is a diameter 1mm, length 45 mm's guide through-hole for guide syringe needle direction of advancing prevents that the syringe needle from taking place the skew. The guide ring 4012 is a metal disc with a diameter of 30mm and a thickness of 4mm, the center of the disc is provided with a needle outlet hole, and four guide holes with a diameter of 2.5mm are distributed on the disc surface in diagonal directions and correspond to guide rods of the sample inlet connection guide male heads.

The sample injection trigger microswitch 402 is a push travel switch that provides an actuation signal to the lower drive electromagnet 806. The device is arranged on the side surface of a telescopic positioning sheath 4011 and vertically corresponds to a guide rod 4031 connected with a guide male head of a sample inlet, when the telescopic positioning sheath 4011 is pressed to shrink, the front end of the guide rod 4031 touches a pressing travel switch to send an action signal, so that a lower driving electromagnet 806 is electrified, a driving polar plate 802 is attracted to move downwards quickly, the driving polar plate 802 is always adsorbed on the lower driving electromagnet 806 as long as a sample introduction trigger microswitch is always switched on, and the loss of a measured gas sample caused by the fact that a carrier gas pressure in a chromatograph flushes a syringe core is prevented.

Above is the utility model discloses a preferred embodiment, all rely on the utility model discloses the change that technical scheme made, produced functional action does not surpass the utility model discloses during technical scheme's scope, all belong to the utility model discloses a protection scope.

Claims (8)

1. The utility model provides an oil chromatogram gas sample injector which characterized in that, including injector operating handle and chromatograph introduction port connection guider, injector operating handle mainly comprises the casing and locates built-in syringe and electromagnetic force drive arrangement in the casing, built-in syringe includes the injection tube, locates the syringe needle of injection tube front end and locates the piston push rod in the injection tube, electromagnetic force drive arrangement is connected with built-in syringe's piston push rod to drive its seesaw, the syringe needle of introduction wears out from injector operating handle front end outlet, chromatograph introduction port connection guider includes the male head of introduction port connection direction and the female head of introduction port connection direction that can mutually support the connection, the male head of introduction port connection direction is installed on the chromatograph introduction port, the female head of introduction port connection direction is installed in injector operating handle front end outlet, the sample injection needle is guided by positioning to be quickly and accurately connected with a sample injection port of a chromatograph.

2. The oil chromatography gas sample injector of claim 1, wherein the electromagnetic force driving device comprises a transmission connecting rod, a syringe tail connector, an upper driving electromagnet and a lower driving electromagnet, the transmission connecting rod is connected with the rear end of a piston push rod of the built-in syringe through the syringe tail connector, the upper driving electromagnet and the lower driving electromagnet are oppositely arranged on the upper side and the lower side of the transmission connecting rod, the upper part and the lower part of the transmission connecting rod are respectively provided with a driving polar plate which can be sucked by the upper driving electromagnet and the lower driving electromagnet, the upper driving electromagnet and the lower driving electromagnet are respectively electrically connected with the control device so as to be electrified to generate magnetic force, the transmission connecting rod is driven to move up and down by sucking the corresponding driving polar plate, and the piston push rod is driven to move back and forth through the syringe tail connector.

3. The oil chromatography gas sample injector of claim 2, wherein a driving device chute for guiding the up-and-down movement of the transmission connecting rod is arranged in the casing of the operating handle of the injector, and a roller is hinged on the edge of the driving polar plate, which is contacted with the driving device chute, so as to reduce friction force.

4. The oil chromatography gas sample injector of claim 3, wherein the upper and lower driving electromagnets are mounted on the driving device chute, and the mounting position can be adjusted up and down to adapt to different sample injection amounts.

5. The oil chromatography gas sample injector of claim 2, wherein a photoelectric position sensor is disposed beside the front end of the syringe barrel, and the photoelectric position sensor is electrically connected to the control device to disable the upper driving electromagnet when the infrared light is blocked by the piston rod, and to enable the upper driving electromagnet to be powered when the infrared light is turned on, so as to attract the driving pole plate to drive the transmission link rod to move upward.

6. The injector of claim 2, wherein the chromatograph sample inlet connection guide device is provided with a sample inlet trigger micro-switch on the sample inlet connection guide female head, the sample inlet trigger micro-switch is triggered by the sample inlet connection guide male head when the sample inlet connection guide male head is in fit connection with the sample inlet connection guide female head, and the sample inlet trigger micro-switch is electrically connected with the control device, so that when the sample inlet trigger micro-switch is triggered, the lower driving electromagnet is powered on, and the driving pole plate is attracted to drive the transmission link to move downwards.

7. The oil chromatography gas sample injector as claimed in claim 2, wherein the sample inlet connection guide female head is mainly composed of a telescopic positioning sheath, a guide ring and an expansion positioning spring, the telescopic positioning sheath is a conical multi-layer nested structure with a guide through hole in the middle, one end of the telescopic positioning sheath is fixed on the front end outlet of the operating handle of the injector, the other end of the telescopic positioning sheath is connected with the guide ring, the expansion positioning spring is arranged in the conical multi-layer nested structure and is used for expanding the front part of the nested structure to keep the nested structure in a direction parallel to the sample injection needle all the time, the middle part of the guide ring is provided with a needle outlet hole, and the side of the guide ring is provided with a; the public head of introduction port connection direction mainly comprises seal base and guide bar, the seal base lower extreme is installed on the chromatograph introduction port, and the upper end is connected with the guide bar, the guide bar suits with the guiding hole to make the public head of introduction port connection direction and the female head cooperation of introduction port connection direction be connected.

8. The oil chromatography gas sample injector as claimed in claim 2, wherein the housing is provided with a fixing slot for positioning the built-in syringe, and the surface of the housing is provided with a transparent observation window for observing the condition of the built-in syringe.

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