A sampling gripper for a purge trap

Abstract

This utility model relates to a sampling gripper for a purge and trap device, belonging to the technical field of purge and trap equipment. It includes a fixed back plate, a sliding track, a first slider, a second slider, and a cam structure for driving the first and second sliders along the sliding track. A support plate is fixed to the front side of the fixed back plate, and an adjustment mechanism is provided between the first and second sliders. This sampling gripper for a purge and trap device, by starting a motor, causes multiple hinged rods on the middle side to rotate, driving the worm gear on the left side to rotate. The linkage of multiple hinged rods reduces costs and improves practicality. By adjusting the distance between two adjacent bottle-gripping columns, it can be adapted to sampling bottles of different sizes, improving the stability and practicality of the sampling bottles.

Description

Technical Field

[0001] This utility model relates to the field of purging and trapping equipment technology, specifically a sampling claw for a purging and trapping instrument. Background Technology

[0002] The purge-and-trap instrument, when coupled with gas chromatography (GC) or gas chromatography-mass spectrometry (GC-MS), has a wide range of applications and can solve the analysis and determination of complex types of samples in water and soil. In existing purge-and-trap instruments, a gripper mechanism is generally used to grab the sample vial during sample delivery and purging.

[0003] For example, Chinese patent CN217237221 U discloses a sampling gripper for a purge trap and the purge trap itself. The sampling gripper of the purge trap includes: a fixed plate, a slide rail, a first slider, a second slider, and a cam mechanism for driving the first slider and the second slider to move in opposite directions and in opposite directions along the slide rail. The slide rail is horizontally mounted on the fixed plate. The first slider and the second slider are both slidably mounted on the slide rail. The top of the cam mechanism is rotatably mounted on the fixed plate. One end of the first slider and one end of the second slider are connected to the cam mechanism for transmission.

[0004] The aforementioned sampling gripper and purge trap still have certain shortcomings. While the first and second sliders move in opposite directions or away from each other along a slide rail to grip and release the sampling bottle, improving the stability and reliability of the gripper and reducing the failure rate, the gripping stability may decrease when gripping sampling bottles of different sizes. For example, when gripping a sampling bottle with a smaller outer diameter, the distance between the two pairs of grippers is greater than the outer diameter of the sampling bottle, making it inconvenient to grip sampling bottles of different sizes. Therefore, this application proposes a sampling gripper for a purge trap to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a sampling gripper for a purge trap, which has the advantages of being able to easily grip sampling bottles of different sizes, thus solving the problem of difficulty in gripping sampling bottles of different sizes.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sampling claw for a purge trap, comprising a fixed back plate, a sliding track, a slider one, a slider two, and a cam structure for driving slider one and slider two to move along the sliding track. A support plate is fixed to the front side of the fixed back plate, and an adjustment mechanism is provided between slider one and slider two.

[0007] The top of both slider one and slider two are equipped with bearings located in the elliptical groove. The bottom of both slider one and slider two is provided with a pair of bottle-gripping columns for gripping sample bottles. The outer sides of the multiple bottle-gripping columns are covered with soft rubber sleeves. The top and bottom of the sliding track are provided with sliding grooves. The middle parts of slider one and slider two are slidably installed in the sliding grooves.

[0008] Furthermore, the adjustment mechanism includes two boxes respectively installed on the inner bottom of slider one and slider two. Two worm gears are rotatably connected between the left and right side walls of the inner cavities of the two boxes. A worm wheel is engaged on the outer side of each of the two worm gears. A connecting rod is welded inside each of the two worm wheels. Threaded rods are fixed at the upper and lower ends of each of the two connecting rods. Movable sleeves are threadedly connected to the outer sides of the threaded rods on both the left and right sides. A motor is fixed on the right side of the right box. A connecting seat is fixed on the opposite side of each of the two worm gears. Two hinge rods are hinged to the opposite side of each of the two connecting seats via hinge shafts.

[0009] Furthermore, the worm gear on the right side is fixed to the outside of the motor output shaft, and the connection between the opposite sides of the hinge rods on the left and right sides is hinged together by a hinge shaft.

[0010] Furthermore, the threaded rods on the upper and lower sides have opposite thread directions, and two grooves are opened at the bottom of both boxes. The four bottle-gripping columns are respectively welded to the bottom of the four movable sleeves.

[0011] Furthermore, multiple sliding rods are fixed to the front and rear side walls of the two inner cavities of the two boxes, and sliding blocks that are slidably connected to the outside of the sliding rods on the left and right sides are fixed to the left and right ends of the four movable sleeves.

[0012] Furthermore, U-shaped plates are fixed to the left and right side walls of the inner cavities of the two boxes, and two worm gears are rotatably connected to the inside of the left and right U-shaped plates respectively. The sliding rods on the front and rear sides are respectively welded to the front and rear sides of the four U-shaped plates.

[0013] Furthermore, the support plate has a central opening and an electric servo motor is installed inside the opening, and the top of the cam structure is connected to the output shaft of the electric servo motor.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] The sampling gripper used in the purge trap starts rotating multiple hinged rods on the middle side by starting the motor, which in turn drives the worm gear on the left side to rotate. The linkage of multiple hinged rods can reduce costs and improve practicality. By adjusting the distance between two adjacent bottle-gripping columns, it can be adapted to sampling bottles of different sizes, improving the stability and practicality of the sampling bottles. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a perspective view of the adjustment mechanism of this utility model;

[0018] Figure 3 This is a top cross-sectional view of the adjustment mechanism of this utility model.

[0019] In the diagram: 1 Adjustment mechanism, 101 Box body, 102 Worm gear, 103 Worm wheel, 104 Threaded rod, 105 Movable sleeve, 106 Motor, 107 Hinge rod, 2 Bottle gripping column, 3 Slider one, 4 Sliding rail, 5 Slide groove, 6 Support plate, 7 Fixed back plate, 8 Electric servo motor, 9 Cam structure, 10 Soft rubber sleeve, 11 Slider two, 12 Bearing. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 2 A sampling claw for a purge trap in this embodiment includes a fixed back plate 7, a sliding track 4, a slider 1 3, a slider 2 11, and a cam structure 9 for driving slider 1 3 and slider 2 11 to move along the sliding track 4. A support plate 6 is fixed to the front side of the fixed back plate 7, and an adjustment mechanism 1 is provided between slider 1 3 and slider 2 11.

[0022] Both slider 1 (3) and slider 2 (11) are equipped with bearings 12 at their top ends, which are located in elliptical grooves. Both slider 1 (3) and slider 2 (11) are equipped with a pair of bottle-gripping columns 2 at their bottom ends. Soft rubber sleeves 10 are fitted on the outer sides of the multiple bottle-gripping columns 2. Slide grooves 5 are provided at the top and bottom of the sliding track 4. The middle parts of slider 1 (3) and slider 2 (11) are slidably installed in the slide grooves 5.

[0023] The support plate 6 has an opening in the middle and an electric servo motor 8 is installed inside the opening. The top of the cam structure 9 is connected to the output shaft of the electric servo motor 8.

[0024] It is understandable that the electric servo motor 8 drives the cam structure 9 to rotate, and transmits the power to slider 3 and slider 11 through the cam structure 9, causing slider 3 and slider 11 to move in opposite directions or away from each other along the sliding track 4, so that slider 3 and slider 2 can cooperate to clamp or release the sampling bottle.

[0025] Please see Figure 3 In this embodiment, the adjustment mechanism 1 includes two boxes 101 respectively installed on the inner bottom of slider 1 3 and slider 2 11. Two worm gears 102 are rotatably connected between the left and right side walls of the inner cavity of the two boxes 101. Worm wheels 103 are meshed on the outer sides of the two worm gears 102. Connecting rods are welded inside the two worm wheels 103. Threaded rods 104 are fixed at the upper and lower ends of the two connecting rods. Movable sleeves 105 are threadedly connected to the outer sides of the threaded rods 104 on both the left and right sides. A motor 106 is fixed on the right side of the right box 101. Connecting seats are fixed on the opposite sides of the two worm gears 102. Two hinge rods 107 are hinged to the opposite sides of the two connecting seats through hinge shafts. During the relative movement of slider 1 3 and slider 2 11, the parallelogram structure formed by the four hinge rods 107 can extend to the front and rear ends.

[0026] The right worm gear 102 is fixed to the outside of the output shaft of the motor 106. The connection between the opposite sides of the left and right hinge rods 107 is hinged through a hinge shaft. The threads of the upper and lower threaded rods 104 are opposite in direction. Two grooves are opened at the bottom of each of the two boxes 101. The four bottle-gripping columns 2 are respectively welded to the bottom of the four movable sleeves 105. Multiple sliding rods are fixed on the front and rear side walls of the inner cavity of the two boxes 101. Sliding blocks that are slidably connected to the outside of the sliding rods on the left and right sides are fixed at both ends of the four movable sleeves 105. U-shaped plates are fixed on the left and right side walls of the inner cavity of the two boxes 101, and the two worm gears 102 are respectively rotatably connected to the inside of the left and right U-shaped plates. The front and rear sliding rods are respectively welded to the front and rear sides of the four U-shaped plates. When it is necessary to adjust the sliding rods, the sliding rods can be adjusted to the front and rear sides of the four U-shaped plates. When gripping sampling bottles with smaller outer diameters, the distance between the two pairs of gripping columns 2 needs to be adjusted. At this time, the motor 106 is started, causing the right worm gear 102 to start rotating. Simultaneously, the right worm gear 102 drives multiple hinge rods 107 to start rotating, causing the left worm gear 102 to rotate synchronously, which in turn causes the threaded rods 104 on both sides to start rotating. Since the left and right ends of the four movable sleeves 105 are fixed with sliding blocks that are slidably connected to the outside of the sliding rods on both sides, the distance between two adjacent gripping columns 2 can be adjusted. At the same time, during adjustment, the multiple hinge rods 107 should be set horizontally to avoid touching the sampling bottle. By adjusting the distance between two adjacent gripping columns 2, it is possible to adapt to sampling bottles of different specifications, thereby improving the stability and practicality of the sampling bottles.

[0027] It is understood that all electrical components mentioned in this article are electrically connected to the main controller and power supply, and all electrical components mentioned in this article are conventional and known devices. This application will not elaborate further. The main controller can be a conventional and known device such as a computer that performs control. The control circuit of the main controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices. Therefore, this utility model will not explain the control method and circuit connection in detail. At the same time, all parts not described in detail in this utility model are common technologies known to those skilled in the art.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Furthermore, this application is optimized based on Chinese patent CN217237221 U, therefore, the relevant principles of how slider 1 3 and slider 2 11 move relative to each other will not be elaborated in detail.

[0030] The working principle of the above embodiments is as follows:

[0031] The cam structure 9 is driven by an electric servo motor 8 to rotate, and the cam structure 9 transmits power to slider 3 and slider 11, causing slider 3 and slider 11 to move in opposite directions or away from each other along the sliding track 4. This allows slider 3 and slider 11 to cooperate in gripping or releasing the sampling bottle. During the relative movement, the parallelogram structure composed of four hinged rods 107 can extend to the front and rear ends. However, when gripping sampling bottles with smaller outer diameters, the distance between the two pairs of bottle-gripping columns 2 needs to be adjusted. At this time, the motor 106 is started, causing the right worm gear 102 to open. The rotation begins, and simultaneously, the right worm gear 102 drives multiple hinged rods 107 to rotate, causing the left worm gear 102 to rotate synchronously, which in turn causes the threaded rods 104 on both sides to rotate. Since the left and right ends of the four movable sleeves 105 are fixed with sliding blocks that are slidably connected to the outside of the sliding rods on both sides, the distance between two adjacent bottle-gripping columns 2 can be adjusted. At the same time, during adjustment, the multiple hinged rods 107 should be set horizontally to avoid touching the sampling bottle. By adjusting the distance between two adjacent bottle-gripping columns 2, it can be adapted to sampling bottles of different specifications, improving the stability and practicality of the sampling bottle.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] 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 sampling gripper for a purge trap, comprising a fixed back plate (7), a sliding track (4), a slider one (3), a slider two (11), an elliptical groove, and a cam structure (9) for driving slider one (3) and slider two (11) to move along the sliding track (4), characterized in that: A support plate (6) is fixed to the front side of the fixed back plate (7), and an adjustment mechanism (1) is provided between the slider one (3) and the slider two (11). The top of both slider 1 (3) and slider 2 (11) is equipped with a bearing (12), which is located in the elliptical groove. Both slider 1 (3) and slider 2 (11) are provided with a pair of bottle-gripping columns (2) for gripping sample bottles. The outer sides of the multiple bottle-gripping columns (2) are covered with soft rubber sleeves (10). The top and bottom of the sliding track (4) are provided with sliding grooves (5). The middle parts of slider 1 (3) and slider 2 (11) are slidably installed in the sliding grooves (5).

2. The sampling gripper for a purge trap according to claim 1, characterized in that: The adjustment mechanism (1) includes two boxes (101) respectively installed on the bottom inner side of slider one (3) and slider two (11). Two worm gears (102) are rotatably connected between the left and right side walls of the inner cavity of the two boxes (101). A worm wheel (103) is meshed on the outer side of each of the two worm gears (102). A connecting rod is welded inside each of the two worm wheels (103). Threaded rods (104) are fixed at the upper and lower ends of each of the two connecting rods. Movable sleeves (105) are threadedly connected to the outer side of each of the left and right threaded rods (104). A motor (106) is fixed on the right side of the right box (101). A connecting seat is fixed on the opposite side of each of the two worm gears (102). Two hinge rods (107) are hinged to the opposite side of each of the two connecting seats through a hinge shaft.

3. A sampling gripper for a purge trap according to claim 2, characterized in that: The worm gear (102) on the right side is fixed to the outside of the output shaft of the motor (106), and the connection between the opposite sides of the hinge rods (107) on the left and right sides is hinged together by the hinge shaft.

4. A sampling gripper for a purge trap according to claim 2, characterized in that: The threaded rods (104) on the upper and lower sides have opposite thread directions. The bottom of each of the two boxes (101) has two grooves. The four bottle-gripping columns (2) are welded to the bottom of the four movable sleeves (105).

5. A sampling gripper for a purge trap according to claim 2, characterized in that: Multiple sliding rods are fixed to the front and rear side walls of the inner cavities of the two boxes (101), and sliding blocks that are slidably connected to the outside of the sliding rods on the left and right sides are fixed to the left and right ends of the four movable sleeves (105).

6. A sampling gripper for a purge trap according to claim 5, characterized in that: The left and right side walls of the inner cavities of the two boxes (101) are fixed with U-shaped plates and two worm gears (102) are rotatably connected to the inside of the left and right side U-shaped plates respectively. The sliding rods on the front and rear sides are respectively welded to the front and rear sides of the four U-shaped plates.

7. A sampling gripper for a purge trap according to claim 1, characterized in that: The support plate (6) has an opening on the middle side and an electric servo motor (8) is installed in the opening. The top of the cam structure (9) is connected to the output shaft of the electric servo motor (8).

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