Foreign matter alarm device for automatic sampler of gas chromatograph

Abstract

The utility model discloses a foreign matter alarm device for an automatic sampler of a gas chromatograph, which belongs to the technical field of samplers and comprises a supporting unit, a limiting unit and a connecting unit, the supporting unit comprises a base, the limiting unit comprises an inserting groove arranged at the edge of the upper surface of a supporting plate and an inserting plate inserted into the inserting groove, and the connecting unit is connected with the inserting groove. The fixed plate is fixedly connected with the top of the inserting plate, the sample injection mechanism is connected with the fixed plate, the connecting unit comprises a movable groove formed in the bottom of the sample injection mechanism, and a guide hole penetrating through the side face of the sample injection mechanism is formed in the movable groove; a reset spring fixedly connected with the inner wall of the movable groove is fixedly installed at the end, away from the guide block, of the button, a vertical plate is fixedly installed at the bottom of the part, located in the movable groove, of the button, and a positioning block is fixedly installed on the side, away from the button, of the vertical plate. The sample injection mechanism has the advantage that the sample injection mechanism is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of sample injectors, in particular to a foreign body alarm device for an automatic sample injector of a gas chromatograph. Background Art

[0002] Gas chromatograph is an instrument that uses chromatographic separation and detection technology to perform qualitative and quantitative analysis on complex multi-component mixtures. It can usually be used to analyze thermally stable organic matter in soil with a boiling point not exceeding 500°C, such as volatile organic compounds, organochlorine, organophosphorus, polycyclic aromatic hydrocarbons, phthalate esters, etc.

[0003] The gas chromatograph is used in combination with the injector. The injector transports the object to be detected into the gas chromatograph, and the instruments in the gas chromatograph detect the substance. Among them, foreign matter detection will be performed. The foreign matter mainly includes sample residues, stationary phase residues, mobile phase residues and instrument cleaning residues. An alarm will be issued after detection.

[0004] The sample injector can continuously and stably change the position of different objects to be detected and perform circular rotation adjustment, but the structure of the sample injector is mostly integrated, which is troublesome and inconvenient to disassemble and assemble when it needs to be repaired, replaced or cleaned.

[0005] Based on this, it is necessary to propose a sample injector that is easy to disassemble and assemble so as to facilitate operations such as replacement. Utility Model Content

[0006] The purpose of the utility model is to provide a foreign body alarm device for an automatic sampler of a gas chromatograph, so as to solve the above technical problems to at least a certain extent and facilitate the disassembly and assembly of the sampler.

[0007] To achieve the above object, the utility model provides the following technical solution: comprising a support unit, a limiting unit and a connecting unit, wherein the support unit comprises a base, a support rod installed at a central position above the base and a support plate fixedly connected to the support rod;

[0008] The limiting unit includes a plug-in slot provided at the edge of the upper surface of the support plate, a plug-in plate inserted into the plug-in slot, a fixed plate fixedly connected to the top of the plug-in plate, and a sample introduction mechanism connected to the fixed plate;

[0009] The connecting unit includes a movable groove provided at the bottom of the injection mechanism, a guide hole passing through the side of the injection mechanism is provided inside the movable groove, and guide grooves are symmetrically provided on the inner wall of the guide hole, a guide block is slidably installed inside the guide groove, and the guide block is fixedly connected to the button inside the guide hole, and a return spring fixedly connected to the inner wall of the movable groove is fixedly installed on the end of the button away from the guide block, a vertical plate is fixedly installed at the bottom of the part of the button in the movable groove, and a positioning block is fixedly installed on the side of the vertical plate away from the button, a connecting groove is vertically arranged at the top edge of the base, and a positioning hole is provided on the inner wall of the connecting groove in the same direction as the positioning block.

[0010] Preferably, the surface area of ​​the plug slot is larger than the surface area of ​​the plug board, and the fixing plate is parallel to the upper surface of the supporting plate.

[0011] Preferably, the plug-in slots are evenly arranged and installed on the top of the support plate, and the plug-in slots correspond to the plug-in plates in a one-to-one position.

[0012] Preferably, two fixing plates are fixedly installed on the sides of the sample injection mechanism, and plug-in plates are vertically installed on the bottoms of the two fixing plates.

[0013] Preferably, the button is installed in parallel with the return spring, a portion of the button is located in the movable groove, and another portion of the button is located outside the movable groove.

[0014] Preferably, two guide blocks are symmetrically installed at both ends of the button, and the two guide blocks are always in the guide groove.

[0015] Preferably, when the bottom of the sample injection mechanism is completely on the base, the vertical plate is located inside the connecting groove, and the plug-in plate is located inside the plug-in groove.

[0016] Preferably, the side area of ​​the positioning hole is larger than the side area of ​​the positioning block, and when the return spring releases its elastic potential energy, the positioning block is located inside the positioning hole.

[0017] Preferably, two connecting units are symmetrically installed on each of the sample injection mechanisms.

[0018] Preferably, the lower surface area of ​​the vertical plate and the positioning block is smaller than the lower surface area of ​​the connecting groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] When the utility model is used, the plug-in plate is inserted into the plug-in slot and the sampling mechanism is kept falling vertically, the button is pressed in the direction of the return spring, the return spring contracts, and elastic potential energy is generated, so that the button enters the guide hole, and the button moves in the direction of the spring, driving the vertical plate and the positioning block to move in the same direction, so that the positioning block and the vertical plate enter the connecting slot, and then the button is released, and the return spring releases the elastic potential energy. When the positioning block is aligned with the positioning hole, the positioning block enters the positioning hole and is limited, so that the sampling mechanism will not fall off when the whole device is rotated. In the above manner, the vertical plate and the positioning block can be taken out from the connecting slot, and the sampling mechanism can be further taken out, which is convenient for disassembly and assembly of the sampling mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0023] Figure 2 This is a schematic external cross-sectional view of the sample injection mechanism and base structure of this embodiment;

[0024] Figure 3 This is a schematic cross-sectional view of the overall structure of this embodiment;

[0025] Figure 4 This is an enlarged schematic diagram of the structure at point A of this embodiment.

[0026] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0027] 100, support unit; 110, base; 120, support rod; 130, support plate;

[0028] 200, limit unit; 210, plug-in slot; 220, plug-in plate; 230, fixed plate; 240, injection mechanism; 241, movable slot; 2411, guide hole; 24111, guide groove;

[0029] 300, connecting unit; 310, button; 320, guide block; 330, return spring; 340, vertical plate; 350, positioning block; 360, connecting groove; 361, positioning hole. DETAILED DESCRIPTION

[0030] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0031] Please refer to Figure 1-4 The present application provides a technical solution: a foreign matter alarm device for an automatic sampler of a gas chromatograph, comprising a supporting unit 100, a limiting unit 200 and a connecting unit 300. The supporting unit 100 comprises a base 110, a supporting rod 120 installed at the center position above the base 110, and a supporting plate 130 fixedly connected with the supporting rod 120. The limiting unit 200 and the connecting unit 300 can be supported by the base 110, so that each unit mechanism can be stably installed and normally used without other special purposes, which will not be described here.

[0032] Please refer to Figure 3 and Figure 4 In a preferred embodiment, the limiting unit 200 comprises a plug-in slot 210 opened at the edge of the upper surface of the supporting plate 130, a plug-in plate 220 inserted into the plug-in slot 210, the surface area of the plug-in slot 210 being greater than that of the plug-in plate 220, and a fixed plate 230 parallel to the upper surface of the supporting plate 130. The plug-in slots 210 are uniformly arranged and installed at the top of the supporting plate 130, and the plug-in slots 210 and the plug-in plates 220 are in one-to-one position correspondence. Two fixed plates 230 are fixedly installed on the side surface of the sampling mechanism 240, and the bottom of each fixed plate 230 is vertically installed with a plug-in plate 220.

[0033] The plug-in slot 210 at the edge of the top of the supporting plate 130 facilitates the prevention of the sampling mechanism 240, and the plug-in plate 220 can be more conveniently inserted into the plug-in slot 210. When the sampling device is completely placed on the base 110, the fixed plate 230 is in contact with the top of the supporting plate 130 and is supported. Through the connection of the plurality of plug-in slots 210 and plug-in plates 220, the sampling device can be more stably installed and is not prone to looseness and falling off.

[0034] Please refer to Figure 1 , Figure 2 Further preferably, the fixed plate 230 fixedly connected with the top of the plug-in plate 220 and the sampling mechanism 240 connected with the fixed plate 230 are symmetrical in installation.

[0035] Through the two connecting units 300 on the sampling mechanism 240, the connection between the sampling mechanism 240 and the base 110 can be more closely and sufficiently, effectively preventing the sampling mechanism 240 from loosening and falling off.

[0036] See Figure 3 、 Figure 4 In a further preferred embodiment, the connecting unit 300 includes a movable groove 241 opened at the bottom of the sample injection mechanism 240, and a guide hole 2411 passing through the side of the sample injection mechanism 240 is opened inside the movable groove 241, and the inner wall of the guide hole 2411 is symmetrically opened with guide grooves 24111, and a guide block 320 is slidably installed inside the guide groove 24111. Two guide blocks 320 are symmetrically installed at both ends of the button 310, and the two guide blocks 320 are always in the guide groove 24111. The guide blocks 320 are fixedly connected to the button 310 inside the guide hole 2411.

[0037] The button 310 can move in two directions through the movable groove 241, and the guide block 320 can slide in two directions through the guide groove 24111. When the button 310 receives a force, the guide block 320 moves at the same time, and the setting of the guide block 320 and the guide groove 24111 can prevent the button 310 from rotating and prevent the return spring 330 from being damaged.

[0038] A return spring 330 fixedly connected to the inner wall of the movable groove 241 is fixedly mounted on one end of the button 310 away from the guide block 320 , and the button 310 and the return spring 330 are mounted in parallel.

[0039] The return spring 330 can absorb and release the force applied to the button 310 , change the force as needed, and prevent the button 310 from shifting in position and angle during use.

[0040] See Figure 2 、 Figure 3 and Figure 4 In a further preferred embodiment, a portion of the button 310 is located in the movable groove 241 , and another portion of the button 310 is located outside the movable groove 241 .

[0041] The button 310 is always in the guide hole 2411, and since the guide groove 24111 does not extend toward the outer wall of the injection mechanism 240, its guide block 320 cannot fall out of the guide groove 24111, and the guide block 320 cannot fall out when moving toward the return spring 330. This further prevents the button 310 from falling out of the guide hole 2411 and can only move within a certain range, thereby improving its fault tolerance and preventing it from falling and affecting its use.

[0042] A vertical plate 340 is fixedly installed at the bottom of the button 310 in the movable groove 241. When the bottom of the injection mechanism 240 is completely on the base 110, the vertical plate 340 is inside the connecting groove 360 ​​and the plug-in plate 220 is inside the plug-in groove 210.

[0043] When the injection mechanism 240 is raised or lowered, the vertical plate 340, the positioning block 350, the plug-in plate 220 and the fixed plate 230 move simultaneously, that is, they are raised or lowered simultaneously. When the injection mechanism 240 is disassembled and assembled normally, the plug-in plate 220 is inserted into the plug-in slot 210 and the vertical plate 340 enters the connecting slot 360 simultaneously, ensuring the accuracy during disassembly and assembly, and preventing the limit unit 200 from being installed but the connecting unit 300 is not in the state to be installed, or the limit unit 200 is installed but the connecting unit 300 is not in the state to be installed.

[0044] See Figure 3 、 Figure 4 In a further preferred embodiment, a positioning block 350 is fixedly installed on the side of the vertical plate 340 away from the button 310, and a connecting groove 360 ​​is vertically arranged at the top edge of the base 110. The inner wall of the connecting groove 360 ​​is provided with a positioning hole 361 in the same direction as the positioning block 350. The side area of ​​the positioning hole 361 is larger than the side area of ​​the positioning block 350. When the return spring 330 releases its elastic potential energy, the positioning block 350 is inside the positioning hole 361, and the lower surface area of ​​the vertical plate 340 and the positioning block 350 is smaller than the lower surface area of ​​the connecting groove 360.

[0045] The positioning block 350 moves up and down with the vertical plate 340. The positioning block 350 and the vertical plate 340 can be operated straight up and down. When the two structures are completely inserted into the connecting groove 360, the return spring 330 releases its elastic potential energy and extends to push the button 310 and the vertical plate 340 outward. At this time, the vertical plate 340 pushes the positioning block 350 into the positioning hole 361 to play a positioning and connecting role.

[0046] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0048] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A foreign body alarm device for a gas chromatograph automatic sampler, comprising a support unit (100), a limit unit (200) and a connection unit (300), characterized in that: The support unit (100) comprises a base (110), a support rod (120) installed at a central position above the base (110), and a support plate (130) fixedly connected to the support rod (120); The limiting unit (200) comprises a plug-in slot (210) provided at an edge of an upper surface of the supporting plate (130), a plug-in board (220) inserted into the plug-in slot (210), a fixing plate (230) fixedly connected to the top of the plug-in board (220), and a sample introduction mechanism (240) connected to the fixing plate (230); The connecting unit (300) includes a movable groove (241) provided at the bottom of the sample injection mechanism (240), a guide hole (2411) passing through the side of the sample injection mechanism (240) is provided inside the movable groove (241), a guide groove (24111) is symmetrically provided on the inner wall of the guide hole (2411), a guide block (320) is slidably installed inside the guide groove (24111), the guide block (320) is fixedly connected to the button (310) inside the guide hole (2411), and the button (310) is away from the guide hole (2411). A return spring (330) fixedly connected to the inner wall of the movable groove (241) is fixedly installed at one end of the block (320); a vertical plate (340) is fixedly installed at the bottom of the button (310) in the middle of the movable groove (241); a positioning block (350) is fixedly installed on the side of the vertical plate (340) away from the button (310); a connecting groove (360) is vertically arranged at the top edge of the base (110); and a positioning hole (361) is provided on the inner wall of the connecting groove (360) in the same direction as the positioning block (350).

2. A foreign body alarm device for a gas chromatograph automatic sampler according to claim 1, characterized in that: The surface area of ​​the plug-in slot (210) is greater than the surface area of ​​the plug-in plate (220), and the fixing plate (230) is parallel to the upper surface of the supporting plate (130).

3. A foreign body alarm device for a gas chromatograph automatic sampler according to claim 2, characterized in that: The plug-in slots (210) are evenly arranged and installed on the top of the support plate (130), and the plug-in slots (210) correspond to the plug-in plates (220) in a one-to-one positional manner.

4. A foreign body alarm device for a gas chromatograph automatic sampler according to claim 1, characterized in that: Two fixing plates (230) are fixedly mounted on the sides of the sample injection mechanism (240), and a plug-in plate (220) is vertically mounted on the bottoms of the two fixing plates (230).

5. The foreign body alarm device for the automatic sampler of a gas chromatograph according to claim 1, characterized in that: The button (310) is installed in parallel with the return spring (330), a portion of the button (310) is located in the movable groove (241), and another portion of the button (310) is located outside the movable groove (241).

6. A foreign body alarm device for a gas chromatograph automatic sampler according to claim 5, characterized in that: Two guide blocks (320) are symmetrically installed at both ends of the button (310), and the two guide blocks (320) are always located in the guide groove (24111).

7. The foreign body alarm device for the automatic sampler of a gas chromatograph according to claim 1, characterized in that: When the bottom of the sample injection mechanism (240) is completely located on the base (110), the vertical plate (340) is located inside the connecting groove (360), and the plug-in plate (220) is located inside the plug-in groove (210).

8. The foreign body alarm device for the automatic sampler of a gas chromatograph according to claim 1, characterized in that: The side area of ​​the positioning hole (361) is larger than the side area of ​​the positioning block (350); when the return spring (330) releases its elastic potential energy, the positioning block (350) is located inside the positioning hole (361).

9. The foreign body alarm device for the automatic sampler of a gas chromatograph according to claim 1, characterized in that: Two connecting units (300) are symmetrically mounted on each of the sample injection mechanisms (240).

10. The foreign body alarm device for the automatic sampler of a gas chromatograph according to claim 7, characterized in that: The lower surface areas of the vertical plate (340) and the positioning block (350) are smaller than the lower surface area of ​​the connecting groove (360).

Images