Locking device for a solid phase extraction sample valve module

Abstract

The utility model relates to locking device technical field, and disclose a kind of locking device of solid phase extraction sample introduction valve module, comprising: fixed plate, valve rotary connecting block, sample introduction valve locking ring, ball head plunger, sample introduction valve module and valve seat;Valve core drive is installed on the fixed plate, valve rotary connecting block is fixedly connected on the valve core drive, and valve rotary connecting block is concentric with the rotating shaft of valve core drive;Valve rotary connecting block and sample introduction valve locking ring shaft hole are connected, ball head plunger is installed on the outer circle of valve rotary connecting block, the inner wall of sample introduction valve locking ring is equipped with V-shaped ring groove and two circular-arc grooves perpendicular to V-shaped ring groove;Valve rotary connecting block outer circle is over-pressing and is equipped with cylindrical pin, the end face of sample introduction valve locking ring is equipped with notch matched with cylindrical pin.The utility model can ensure that valve core and valve drive are concentric to prevent sample introduction valve failure, realize reliable locking and convenient disassembly of sample introduction valve module, solve its problem of loosening and valve core jamming.

Description

Technical Field

[0001] This utility model relates to the field of locking device technology, specifically a locking device for a solid phase extraction sample loading valve module. Background Technology

[0002] Solid phase extraction technology is widely used in environmental monitoring, food safety, clinical testing and other fields. In the sample pretreatment process of this technology, the sample loading valve module is the key component for sample loading. Its operational stability directly affects the experimental efficiency and operational reliability. Therefore, the installation, positioning and disassembly design of the sample loading valve module is crucial to the overall performance of the solid phase extraction instrument.

[0003] In existing technologies, the sample loading valve module lacks a precise concentric positioning structure and fails to ensure the concentricity of the valve core and the valve core driving device through reasonable design. This leads to easy displacement of the valve core during rotation, which in turn causes the sample loading valve to fail to open or close. At the same time, the locking and disassembly mechanism of the sample loading valve module is imperfect. It cannot reliably lock the module to prevent loosening during use, nor has it optimized the structure for the scenario of valve core jamming. This makes it difficult to remove the sample loading valve module smoothly after the valve core jams, affecting the experimental process. Therefore, a locking device for solid phase extraction sample loading valve module is proposed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a locking device for a solid-phase extraction sample loading valve module, thereby solving the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a locking device for a solid-phase extraction sample loading valve module, comprising: Fixed plate, valve rotating connecting block, sample loading valve locking ring, ball plunger, sample loading valve module and valve seat; A valve core drive is mounted on the fixed plate, and a valve rotation connecting block is fixedly connected to the valve core drive. The valve rotation connecting block is concentric with the rotation axis of the valve core drive. This concentric setting can ensure the coaxiality of the valve rotation connecting block when it rotates with the valve core drive, laying the foundation for the subsequent concentric cooperation between the valve core and the valve core drive. The valve rotating connecting block and the sample valve locking ring shaft hole are connected and can rotate relative to each other. A ball-head plunger is installed on the outer circle of the valve rotating connecting block. The sample valve locking ring is annular. The inner wall of the sample valve locking ring is provided with a V-shaped annular groove and two circular arc grooves perpendicular to the V-shaped annular groove. The shaft hole connection enables the relative rotation of the two. The cooperation between the ball-head plunger and the V-shaped annular groove and the circular arc grooves can achieve positioning and locking when rotating the sample valve locking ring, preventing the sample valve locking ring from moving arbitrarily in the non-operational state. The ball-head plunger enters the V-shaped annular groove through the circular arc groove. The valve rotary connecting block is press-fitted with a cylindrical pin on its outer circumference. The end face of the sample valve locking ring is provided with a groove that matches the cylindrical pin. The matching of the cylindrical pin and the groove can further limit the relative rotation range between the valve rotary connecting block and the sample valve locking ring, and improve the stability of the locking state. The valve rotating connecting block is provided with a rectangular groove open at one end, and the sample loading valve locking ring is provided with an open groove of the same size. The design of the open groove facilitates the insertion of the valve core of the sample loading valve module into the rear end, and also facilitates the subsequent disassembly and assembly of the module. When the sample loading valve locking ring is inserted into the valve rotating connecting block, the two grooves overlap. The sample loading valve module includes a valve core and a valve body. The rear end of the valve core is approximately rectangular, one side of the valve core is an arc-shaped surface, and the dimensions of the other three sides of the valve core correspond to the rectangular groove. The correspondence between the dimensions of the other three sides of the valve core and the rectangular groove can ensure the precise fit between the valve core and the valve rotating connecting block after the valve core is embedded, and prevent the valve core from shaking. The valve seat is fixed to the outside of the fixing plate. When the valve seat is installed on the sample loading valve module, the rear end of the valve core enters the rectangular groove. The arc-shaped surface is concentric with the circular shape of the valve rotating connecting block and has the same diameter. The fixing plate is fixed to the main unit. The arc-shaped surface is concentric with the valve rotating connecting block and has the same diameter. This can further ensure the concentricity of the valve core and the valve core drive, and ultimately ensure the stable and reliable opening and closing action of the sample loading valve. At the same time, the fixing of the valve seat provides a stable installation foundation for the sample loading valve module and solves a series of problems caused by the incomplete fixing of the sample loading valve module.

[0006] Preferably, the outer circumference of the sample valve locking ring is provided with knurling, and the knurling is integrally formed with the sample valve locking ring.

[0007] Preferably, the sample valve locking ring has two symmetrical planes, and the planes are integrally formed with the sample valve locking ring.

[0008] Preferably, the V-shaped annular groove is arranged along the circumferential direction of the inner wall of the locking ring of the sample valve.

[0009] Preferably, the two arcuate grooves are arranged along the axial direction of the sample valve locking ring, and the two arcuate grooves are symmetrical with the central axis of the sample valve locking ring.

[0010] Preferably, the rectangular groove is opened along the axial direction of the valve rotating connecting block, and the open end of the rectangular groove faces away from the valve core drive.

[0011] Compared with the prior art, this utility model provides a locking device for a solid phase extraction sample loading valve module, which has the following advantages: This invention achieves precise concentric positioning of the valve core and valve core drive by fixing the valve core drive and valve rotation connecting block on the fixed plate, ensuring the dimensions of the other three sides of the valve core correspond to the rectangular groove, and making the arc-shaped surface of the valve core concentric with the circular shape of the valve rotation connecting block. This ensures stable opening and closing of the sample loading valve and solves the problem of non-concentricity between the valve core and the drive device caused by incomplete fixing of the existing sample loading valve module, leading to sample loading valve opening / closing failure. The connection between the valve rotation connecting block and the sample loading valve locking ring shaft hole, the cooperation of the ball plunger with the V-shaped ring groove and the arc groove, and the matching of the cylindrical pin with the slot ensure reliable locking of the sample loading valve module, preventing loosening during use and solving the problem of sample loading valve module loosening affecting experimental stability. The relative rotation of the valve rotation connecting block and the sample loading valve locking ring, along with the open design of the rectangular groove, allows for convenient disassembly and assembly of the sample loading valve module. Even if the valve core is stuck, the module can still be easily removed, solving the problem of difficulty in removing the valve core when it is stuck in existing sample loading valve modules. Attached Figure Description

[0012] Figure 1 This is a front view of the overall structure of this utility model; Figure 2 This is a perspective view of the locking ring of the sample loading valve of this utility model; Figure 3 This is a perspective view of the valve rotary connection and ball plunger of this utility model; Figure 4 This is a cross-sectional view of the locking ring of the unlocking sample loading valve of this utility model. Figure 5 This is a cross-sectional view of the locking ring of the locking sample valve of this utility model. Figure 6 This is a top view of the locking ring of the sample loading valve in this utility model. Figure 7 This is a cross-sectional view of the locking ring of the sample loading valve of this utility model in its state. Figure 8 This is a top view of the locking ring of the sample loading valve of this utility model in its locked state; Figure 9 This is a cross-sectional view of the locking ring of the locking sample valve of this utility model.

[0013] In the diagram: 1. Fixing plate; 2. Valve rotating connecting block; 3. Sample loading valve locking ring; 4. Ball plunger; 5. Sample loading valve module; 6. Valve seat; 201. Cylindrical pin; 202. Rectangular groove; 301. V-shaped annular groove; 302. Circular arc groove; 303. Groove opening; 304. Open groove; 305. Knurling; 306. Flat surface; 501. Valve core; 502. Valve body; 503. Arc-shaped surface. Detailed Implementation

[0014] 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.

[0015] This utility model provides a technical solution: a locking device for a solid-phase extraction sample loading valve module. Please refer to [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 ,include: 1. Fixed plate, 2. Valve rotating connecting block, 3. Sample loading valve locking ring, 4. Ball head plunger, 5. Sample loading valve module and 6. Valve seat; A valve core drive is installed on the fixed plate 1, and a valve rotation connecting block 2 is fixedly connected to the valve core drive. The valve rotation connecting block 2 is concentric with the rotation axis of the valve core drive. The valve rotating connecting block 2 and the sample valve locking ring 3 are connected by a shaft hole and can rotate relative to each other. A ball head plunger 4 is installed on the outer circle of the valve rotating connecting block 2. The sample valve locking ring 3 is annular. The inner wall of the sample valve locking ring 3 is provided with a V-shaped annular groove 301 and two circular arc grooves 302 perpendicular to the V-shaped annular groove 301. The ball head plunger 4 enters the V-shaped annular groove 301 through the circular arc grooves 302. The outer circumference of the valve rotary connecting block 2 is press-fitted with a cylindrical pin 201, and the end face of the sample valve locking ring 3 is provided with a groove 303 that matches the cylindrical pin 201. The valve rotating connecting block 2 is provided with a rectangular groove 202 with one end open, and the sample loading valve locking ring 3 is provided with an open groove 304 of the same size. When the sample loading valve locking ring 3 is inserted into the valve rotating connecting block 2, the two grooves overlap. The sample loading valve module 5 includes a valve core 501 and a valve body 502. The rear end of the valve core 501 is approximately cuboid, one side of the valve core 501 is an arc-shaped surface 503, and the dimensions of the other three sides of the valve core 501 correspond to the rectangular groove 202. The valve seat 6 is fixed to the outside of the fixing plate 1. When the valve seat 6 is installed on the sample valve module 5, the rear end of the valve core 501 enters the rectangular groove 202. The arc-shaped surface 503 is concentric with the circular shape of the valve rotating connecting block 2 and has the same diameter. The fixing plate 1 is fixed to the main unit. This structure enables precise matching of all components, ensuring that the valve core 501 and the valve core drive are concentric, preventing the sample loading valve from failing to open / close, and ensuring the stable installation and disassembly of the sample loading valve module 5.

[0016] Please see Figure 2 The outer circumference of the sample valve locking ring 3 is provided with knurling 305, and the knurling 305 is integrally formed with the sample valve locking ring 3. The knurling 305 increases the friction between the hand and the sample loading valve locking ring 3, allowing the locking ring to be easily rotated without tools, thus improving the efficiency of locking and unlocking the sample loading valve module 5. The one-piece molding also enhances the structural strength and prevents parts from falling off.

[0017] Please see Figure 2 , Figure 4 and Figure 5 The sample valve locking ring 3 has two symmetrical planes 306, and the planes 306 are integrally formed with the sample valve locking ring 3. When the sample loading valve module 5 malfunctions and becomes stuck and cannot be removed, the symmetrical plane 306 is used to rotate the sample loading valve locking ring 3 with a tool. The sample loading valve locking ring 3 drives the valve rotating connecting block 2 and the valve core 502 to rotate to a position where the sample loading valve 5 can be removed, thereby removing the sample loading valve 5.

[0018] Please see Figure 2 The V-shaped annular groove 301 is set along the circumferential direction of the inner wall of the locking ring 3 of the sample valve; The circumferential V-shaped groove 301 allows the ball plunger 4 to be stably engaged and slide along the groove, restricting the axial movement of the sample loading valve locking ring 3, ensuring that the sample loading valve module 5 does not loosen in the locked state, and providing a guarantee for the stable rotation of the valve core 501.

[0019] Please see Figure 2 Two arc grooves 302 are arranged along the axial direction of the upper sample valve locking ring 3, and the two arc grooves 302 are symmetrical with the central axis of the upper sample valve locking ring 3. The axially symmetrical arc groove 302 provides precise guidance for the ball plunger 4, allowing it to smoothly enter the V-shaped annular groove 301 and avoid jamming. At the same time, the arc groove 302 enables the sample loading valve locking ring 3 to rotate into place, serving as a reminder.

[0020] Please see Figure 3 The rectangular groove 202 is opened along the axial direction of the valve rotating connecting block 2, and the open end of the rectangular groove 202 faces away from the valve core drive. The axially opened rectangular groove 202 with its open end facing a reasonable direction facilitates the smooth insertion of the rear end of the valve core 501 from top to bottom, accurately matches the valve core size, ensures that the valve core 501 and the valve rotating connecting block 2 are concentric, and reduces installation deviation.

[0021] In this design: A fixing plate 1 is fixed to the main unit, with a valve seat 6 mounted externally and a valve core drive mounted internally. The valve core drive is fixed to the valve rotation connecting block 2, and their rotation axes are concentric, forming the basic frame of the device. When installing the sample loading valve module 5, it is placed on the valve seat 6 from top to bottom, so that the rear end of the valve core 501 is embedded in the rectangular groove 202 of the valve rotation connecting block 2. At this time, the arc-shaped surface 503 of the valve core 501 is concentric with the circular shape of the valve rotation connecting block 2. Then, the sample loading valve locking ring 3 is rotated. Because it is connected to the shaft hole of the valve rotation connecting block 2, it can rotate relative to the valve core. The ball plunger 4 on the valve rotation connecting block 2 will move along the sample loading valve. The arc groove 302 on the inner wall of the valve locking ring 3 slides into the V-shaped ring groove 301. At the same time, the cylindrical pin 201 of the valve rotating connecting block 2 cooperates with the groove 303 of the sample loading valve locking ring 3 to limit the movement, thus locking the sample loading valve module 5. When unlocking, the sample loading valve locking ring 3 is rotated in the opposite direction, and the ball plunger 4 exits from the V-shaped ring groove 301 to the arc groove 302, so the sample loading valve module 5 can be taken out upwards. The knurling 305 assists in achieving convenient rotation. The flat surface 306 can be used to rotate the valve core 502 and remove the sample loading valve module 5 when the valve core 502 is stuck in the sample loading valve module 5 and cannot be rotated.

[0022] 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 process, method, article, or apparatus.

[0023] 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 locking device for a solid-phase extraction sample loading valve module, characterized in that, include: Fixed plate (1), valve rotating connecting block (2), sample loading valve locking ring (3), ball head plunger (4), sample loading valve module (5) and valve seat (6); A valve core drive is installed on the fixed plate (1), and a valve rotation connecting block (2) is fixedly connected to the valve core drive. The valve rotation connecting block (2) is concentric with the rotation axis of the valve core drive. The valve rotating connecting block (2) and the sample valve locking ring (3) are connected by a shaft hole. A ball-head plunger (4) is installed on the outer circle of the valve rotating connecting block (2). The inner wall of the sample valve locking ring (3) is provided with a V-shaped ring groove (301) and two circular arc grooves (302) perpendicular to the V-shaped ring groove (301). The valve rotating connecting block (2) has an interference fit cylindrical pin (201) on its outer circumference, and the end face of the sample valve locking ring (3) is provided with a groove (303) that matches the cylindrical pin (201). The valve rotating connecting block (2) is provided with a rectangular groove (202) with one end open, and the sample valve locking ring (3) is provided with an open groove (304). The sample loading valve module (5) includes a valve core (501) and a valve body (502). One side of the valve core (501) is an arc-shaped surface (503), and the dimensions of the other three sides of the valve core (501) correspond to the rectangular groove (202). The valve seat (6) is fixed to the outside of the fixing plate (1), and the arc-shaped surface (503) is concentric with the circular shape of the valve rotating connecting block (2) and has the same diameter.

2. The locking device for a solid-phase extraction sample loading valve module according to claim 1, characterized in that: The outer circumference of the sample valve locking ring (3) is provided with knurling (305), and the knurling (305) is integrally formed with the sample valve locking ring (3).

3. The locking device for a solid-phase extraction sample loading valve module according to claim 1, characterized in that: The sample loading valve locking ring (3) has two symmetrical planes (306), and the planes (306) are integrally formed with the sample loading valve locking ring (3).

4. The locking device for a solid phase extraction sample loading valve module according to claim 1, characterized in that: The V-shaped annular groove (301) is set along the circumferential direction of the inner wall of the sample valve locking ring (3).

5. The locking device for a solid phase extraction sample loading valve module according to claim 1, characterized in that: The two circular arc grooves (302) are arranged along the axial direction of the sample valve locking ring (3), and the two circular arc grooves (302) are symmetrical with the central axis of the sample valve locking ring (3).

6. The locking device for a solid phase extraction sample loading valve module according to claim 1, characterized in that: The rectangular groove (202) is opened along the axial direction of the valve rotating connecting block (2), and the open end of the rectangular groove (202) faces away from the valve core drive.

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