Preheating device for liquid chromatograph

Abstract

The utility model discloses a preheating device for a liquid chromatograph, which comprises a liquid chromatograph main body, the top end of the liquid chromatograph main body is fixedly connected with a heating box, the bottom end in the heating box is fixedly connected with a heating block, the top end of the heating block is fixedly connected with a heating barrel, an auxiliary mechanism is arranged in the heating barrel, and the auxiliary mechanism is arranged in the liquid chromatograph main body. The motor drives the rotating disc to rotate, the rotating disc rotates to drive the fixing rod to do circular motion on the outer wall of the rotating disc, the fixing rod moves to drive the moving rod to move in the sliding rail through the connecting arm, the moving rod extrudes or lifts the sliding rail, and when the fixing rod continuously rotates, the sliding rail moves up and down in a reciprocating mode; the sliding rail moves to drive the movable column to move in the fixed sliding sleeve, the movable column drives the fixed plate to move in the heating barrel, then the samples located on the lower portion are conveyed upwards, then the samples located on the upper portion are conveyed downwards, the samples are in a flowing state in the heating barrel, and then the rapid preheating effect is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid chromatograph accessories, specifically a preheating device for a liquid chromatograph. Background Technology

[0002] A liquid chromatograph mainly consists of a high-pressure pump, an injection system, a temperature control system, a chromatographic column, a detector, and a signal recording system. Temperature can affect the analytical results, thereby affecting the separation performance of the column and the viscosity of the mobile phase. Therefore, a preheating device is used to preheat the mobile phase or sample before use to ensure that the mobile phase or sample reaches the set temperature before entering the chromatographic column.

[0003] CN217060092U discloses a preheating device for a liquid chromatograph, including a placement plate. A heating tank is mounted on the upper surface of the placement plate. First connecting pipes are fixedly installed on the outer walls of both sides of the heating tank. A motor is mounted on the upper surface of the heating tank. A motor drive rod is mounted at the bottom of the motor. A first heating device is mounted on the outer wall of the motor drive rod. A driving gear is mounted on the side of the motor drive rod away from the motor. A driven gear is mounted on the outer wall of the driving gear. A gear ring is fitted on the outer wall of the driven gear. This preheating device for a liquid chromatograph, by setting up a first heating device and a motor, can improve heating efficiency, save heating time, and improve the detection efficiency of the liquid chromatograph. Furthermore, by setting up the driving gear, driven gear, and gear ring, it can reduce the problem of incomplete sample heating leading to inaccurate liquid chromatograph measurements, thereby improving the accuracy of liquid chromatograph measurements.

[0004] In the above technical solution, the first heating device and the second heating device are used to heat the sample. Since the first heating device and the second heating device are located at the top and bottom of the heating tank respectively, and their rotation speeds are different, although the heating effect of the sample can be achieved, the sample temperature rises more slowly in the middle, and the sample flow speeds at the top and bottom are different, which can easily lead to a decrease in the sample heating rate and prolong the working time. Utility Model Content

[0005] The purpose of this invention is to provide a preheating device for a liquid chromatograph to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a preheating device for a liquid chromatograph, comprising a liquid chromatograph body, a heating box fixedly connected to the top of the liquid chromatograph body, a heating block fixedly connected to the bottom of the heating box, a heating barrel fixedly connected to the top of the heating block, an auxiliary mechanism provided inside the heating barrel, a motor fixedly connected to the outer wall of the heating box, a turntable fixedly connected to the outer wall of the motor, and a fixing rod fixedly connected to the outer wall of the turntable.

[0007] As a further preferred embodiment of this technical solution, a delivery pipe is fixedly connected through the outer wall of the heating box, and the end of the delivery pipe away from the heating box is fixedly connected to the top of the liquid chromatograph body, and a valve is fixedly connected to the top of the delivery pipe.

[0008] As a further preferred embodiment of this technical solution, a connecting rod is fixedly connected to the top of the heating barrel, a fixed sliding sleeve is fixedly connected to the top of the connecting rod, and a movable column is slidably connected to the inner wall of the fixed sliding sleeve, the movable column passing through and slidably connected to the top of the heating barrel.

[0009] As a further preferred embodiment of this technical solution, a slide rail is fixedly connected to the top of the movable column, a moving rod is slidably connected to the inner wall of the slide rail, and a connecting arm is rotatably connected to the outer wall of the moving rod.

[0010] As a further preferred embodiment of this technical solution, the end of the connecting arm away from the moving rod is rotatably connected to the outer wall of the fixed rod, the bottom end of the movable column is fixedly connected to a fixed plate, and the top end of the fixed plate is provided with a feeding notch.

[0011] As a further preferred embodiment of this technical solution, the outer wall of the movable column is provided with a toggle mechanism, and the left and right outer walls of the movable column are rotatably connected with a rotating shaft, and the outer wall of the rotating shaft is fixedly connected with a rectangular toggle plate.

[0012] As a further preferred embodiment of this technical solution, two racks are fixedly connected to the bottom of the heating barrel, and gears are fixedly connected to the outer walls of the two rotating shafts, with the gears meshing with the racks.

[0013] This invention provides a preheating device for a liquid chromatograph, which has the following advantages:

[0014] (1) This utility model uses a motor to drive the turntable to rotate. The rotation of the turntable causes the fixed rod to make a circular motion on the outer wall of the turntable. The movement of the fixed rod uses the connecting arm to drive the moving rod to move inside the slide rail. The moving rod squeezes or lifts the slide rail. When the fixed rod continues to rotate, the slide rail moves up and down back and forth. The movement of the slide rail causes the movable column to move inside the fixed sliding sleeve. The movable column causes the fixed plate to move inside the heating barrel, thereby conveying the sample located below upward and conveying the sample above downward, so that the sample is in a flowing state inside the heating barrel, thereby achieving the effect of rapid preheating.

[0015] (2) This utility model uses gears and racks to mesh. When the gears move up or down, the gears themselves will rotate. The rotation of the gears drives the rotating shaft to rotate. The rotation of the rotating shaft drives the rectangular agitator plate to continuously agitate the sample at the feeding notch, further improving the contact rate of the sample between different positions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional appearance structure of this utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the auxiliary mechanism structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the actuation mechanism of this utility model.

[0020] In the diagram: 1. Liquid chromatograph main body; 2. Heating chamber; 3. Delivery pipeline; 4. Valve; 5. Heating block; 6. Heating tank; 7. Auxiliary mechanism; 71. Motor; 72. Turntable; 73. Fixed rod; 74. Connecting arm; 75. Moving rod; 76. Connecting rod; 77. Fixed sliding sleeve; 78. Moving column; 79. Slide rail; 710. Fixed plate; 711. Feed notch; 8. Actuating mechanism; 81. Rotating shaft; 82. Rectangular actuating plate; 83. Gear; 84. Rack. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] This utility model provides a technical solution: such as Figures 1 to 4 As shown in this embodiment, a preheating device for a liquid chromatograph includes a liquid chromatograph body 1, a heating box 2 fixedly connected to the top of the liquid chromatograph body 1, a heating block 5 fixedly connected to the bottom of the heating box 2, a heating barrel 6 fixedly connected to the top of the heating block 5, an auxiliary mechanism 7 provided inside the heating barrel 6, a motor 71 fixedly connected to the outer wall of the heating box 2, a turntable 72 fixedly connected to the outer wall of the motor 71, and a fixing rod 73 fixedly connected to the outer wall of the turntable 72.

[0023] The outer wall of the heating chamber 2 is connected to a conveying pipe 3, and the end of the conveying pipe 3 away from the heating chamber 2 is fixedly connected to the top of the liquid chromatograph body 1. A valve 4 is fixedly connected to the top of the conveying pipe 3.

[0024] The heated sample inside the heating tank 6 can be transported to the interior of the liquid chromatograph body 1 via the delivery pipe 3.

[0025] The heating barrel 6 is fixedly connected to the top of a connecting rod 76, and the top of the connecting rod 76 is fixedly connected to a fixed sliding sleeve 77. The inner wall of the fixed sliding sleeve 77 is slidably connected to a movable column 78, which passes through and is slidably connected to the top of the heating barrel 6.

[0026] The movable column 78 moves inside the fixed sliding sleeve 77, and the fixed sliding sleeve 77 can restrict the movement of the movable column 78.

[0027] The top of the movable column 78 is fixedly connected to a slide rail 79, the inner wall of the slide rail 79 is slidably connected to a moving rod 75, and the outer wall of the moving rod 75 is rotatably connected to a connecting arm 74.

[0028] The offset generated by the connecting arm 74 can drive the moving rod 75 to move inside the slide rail 79.

[0029] The connecting arm 74 is rotatably connected to the outer wall of the fixed rod 73 at the end away from the moving rod 75, and the bottom end of the movable column 78 is fixedly connected to the fixed plate 710, and the top end of the fixed plate 710 is provided with a feeding notch 711.

[0030] The fixed plate 710 moves inside the heating tank 6, which can cause the sample to flow.

[0031] The movable column 78 is provided with a toggle mechanism 8 on its outer wall. The left and right outer walls of the movable column 78 are rotatably connected with a rotating shaft 81, and the outer wall of the rotating shaft 81 is fixedly connected with a rectangular toggle plate 82.

[0032] The agitator 8 can further agitate the sample, accelerating the heat transfer between samples.

[0033] The heating barrel 6 has two racks 84 fixedly connected to its inner bottom, and gears 83 fixedly connected to the outer walls of the two rotating shafts 81. The gears 83 mesh with the racks 84.

[0034] As gear 83 moves up and down, it meshes with rack 84, causing gear 83 to rotate.

[0035] This utility model provides a preheating device for a liquid chromatograph, the specific working principle of which is as follows:

[0036] In use, the sample to be preheated is placed inside the heating barrel 6. The heating block 5 and motor 71 are turned on. The motor 71 drives the turntable 72 to rotate. The rotation of the turntable 72 causes the fixed rod 73 to move in a circular motion on the outer wall of the turntable 72. The movement of the fixed rod 73 drives the moving rod 75 to move inside the slide rail 79 via the connecting arm 74. The moving rod 75 also squeezes or lifts the slide rail 79. As the fixed rod 73 continues to rotate, the slide rail 79 moves up and down reciprocally. The movement of the slide rail 79 drives the movable column 78 to move inside the fixed sliding sleeve 77. The movable column 78 drives the fixed plate 7 10 moves inside the heating barrel 6, thereby conveying the sample below upward and the sample above downward, so that the sample is in a flowing state inside the heating barrel 6, thereby achieving a rapid preheating effect. During the movement of the movable column 78, since the gear 83 meshes with the rack 84, the gear 83 will rotate itself when it moves up or down. The rotation of the gear 83 drives the rotating shaft 81 to rotate. The rotation of the rotating shaft 81 drives the rectangular agitator plate 82 to continuously agitate the sample at the feeding notch 711, further improving the contact rate of the sample between different positions.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A preheating device for a liquid chromatograph, comprising a liquid chromatograph body (1), characterized in that: A heating box (2) is fixedly connected to the top of the liquid chromatograph body (1). A heating block (5) is fixedly connected to the bottom of the heating box (2). A heating barrel (6) is fixedly connected to the top of the heating block (5). An auxiliary mechanism (7) is provided inside the heating barrel (6). A motor (71) is fixedly connected to the outer wall of the heating box (2). A turntable (72) is fixedly connected to the outer wall of the motor (71). A fixing rod (73) is fixedly connected to the outer wall of the turntable (72).

2. The preheating device for a liquid chromatograph according to claim 1, characterized in that: The outer wall of the heating box (2) is connected to a conveying pipe (3), and the end of the conveying pipe (3) away from the heating box (2) is fixedly connected to the top of the liquid chromatograph body (1). A valve (4) is fixedly connected to the top of the conveying pipe (3).

3. A preheating device for a liquid chromatograph according to claim 2, characterized in that: A connecting rod (76) is fixedly connected to the top of the heating barrel (6), and a fixed sliding sleeve (77) is fixedly connected to the top of the connecting rod (76). A movable column (78) is slidably connected to the inner wall of the fixed sliding sleeve (77), and the movable column (78) passes through and is slidably connected to the top of the heating barrel (6).

4. A preheating device for a liquid chromatograph according to claim 3, characterized in that: The top of the movable column (78) is fixedly connected to a slide rail (79), the inner wall of the slide rail (79) is slidably connected to a moving rod (75), and the outer wall of the moving rod (75) is rotatably connected to a connecting arm (74).

5. A preheating device for a liquid chromatograph according to claim 4, characterized in that: The end of the connecting arm (74) away from the moving rod (75) is rotatably connected to the outer wall of the fixed rod (73). The bottom end of the movable column (78) is fixedly connected to a fixed plate (710), and the top end of the fixed plate (710) is provided with a feeding notch (711).

6. A preheating device for a liquid chromatograph according to claim 5, characterized in that: The outer wall of the movable column (78) is provided with a toggle mechanism (8), and the left and right outer walls of the movable column (78) are rotatably connected with a rotating shaft (81), and the outer wall of the rotating shaft (81) is fixedly connected with a rectangular toggle plate (82).

7. A preheating device for a liquid chromatograph according to claim 6, characterized in that: Two racks (84) are fixedly connected to the bottom of the heating barrel (6), and gears (83) are fixedly connected to the outer walls of the two rotating shafts (81), and the gears (83) mesh with the racks (84).

Images