Push type quartz capillary tube cleaning device

Abstract

A push type quartz capillary tube cleaning device comprises a needle head tail tube and a needle tube matched with the needle head tail tube, the needle head tail tube is a conical tube body with openings in the two ends in the axis direction, the end, close to a small-diameter opening, in the axis direction of the needle head tail tube is arranged to be the front, and the other end, close to a large-diameter opening, in the axis direction of the needle head tail tube is arranged to be the rear. The circumferential outer wall of the elastic sealing plug is matched with the needle head tail tube, a through hole penetrating through the elastic sealing plug in the axis direction is formed in the middle of the elastic sealing plug, the needle tube is horizontally arranged in the front-back direction and comprises an empty cylinder and a piston assembly matched with the empty cylinder, a plug head is arranged on the front portion of the empty cylinder, and two flanges extending in the radial direction are arranged on the rear portion of the empty cylinder. The piston assembly comprises a piston head, a piston shaft and a piston handle which are sequentially connected, the piston head is matched with the empty cylinder, each flange is provided with a rubber band, and the other end of each rubber band is connected with the piston handle. The cleaning device is good in cleaning effect, simple and reasonable in structure, convenient to use and low in cost.

Description

Technical Field

[0001] This utility model relates to a push-type quartz capillary cleaning device. Background Technology

[0002] Quartz capillaries are core separation components in analytical chemistry instruments such as capillary electrophoresis and gas chromatography, and their structure can be found in Chinese patent CN100449310C. They require cleaning before sample injection and separation operations, and the operating buffer or mobile phase should be changed as needed. If there are solid deposits or blockages in the internal channels, they must be flushed to remove them. Currently, the inner diameter of quartz capillary columns used in laboratories is often less than 100 micrometers, while their length can reach tens of meters—this brings many inconveniences to cleaning their internal channels. The pneumatic capillary cleaners equipped in large instruments are complex in structure and have high maintenance costs, hindering their widespread and convenient use in research laboratories. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a push-type quartz capillary cleaning device, which has good cleaning effect, simple and reasonable structure, convenient use and low cost.

[0004] To solve the above-mentioned technical problems, this utility model provides a push-type quartz capillary cleaning device, including a needle tail tube and a needle tube that matches the needle tail tube. The needle tail tube is a tapered tube with openings at both ends along the axial direction. The end closer to the small diameter opening along the axial direction of the needle tail tube is designated as the front, and the end closer to the large diameter opening is designated as the rear. An elastic plug is provided in the front part of the needle tail tube. The circumferential outer wall of the elastic plug cooperates with the needle tail tube. A through hole is provided in the middle of the elastic plug along the axial direction. The needle tube is arranged horizontally in the front-rear direction. The needle tube includes an empty cylinder and a piston assembly that cooperates with the empty cylinder. A plug is provided in the front part of the empty cylinder, and two radially extending flanges are provided in the rear part of the empty cylinder. The rear part of the needle tail tube is screwed to the plug of the empty cylinder. The piston assembly includes a piston head, a piston shaft, and a piston handle connected in sequence. The piston head cooperates with the empty cylinder. Each flange is provided with a rubber band, and the other end of each rubber band is connected to the piston handle.

[0005] For the sake of simplicity, the push-type quartz capillary cleaning device described in this utility model will be referred to as "this device" in the following description.

[0006] The method of using this device is as follows: Separate the needle tail tube from the needle tube and remove the rubber band on the needle tube. Insert one end of the quartz capillary tube, which is open at both ends, into the elastic plug from front to back through the through hole. At this time, the elastic plug is in the state of replacing the capillary tube. Then, pull the piston handle to draw the cleaning fluid (liquid / gas) into the empty cylinder. Then screw it to the needle tail tube and fix it. Then, install the stretched rubber band between the flange and the piston handle. The elastic force of the rubber band pushes the piston forward. After the fluid in the empty cylinder is pressurized, it enters the needle tail tube from the plug. The pressurized fluid pushes the elastic plug of the capillary tube, causing it to extend radially—closing the gap between it and the outer wall of the capillary tube and the inner wall of the needle tail tube, realizing airtight pressurization, and pushing the fluid into the microchannel inside the capillary tube for cleaning. Alternatively, the piston handle of the needle tube can be manually pushed to pressurize without the rubber band, and the capillary tube can be placed in an ultrasonic cleaner to complete the flushing of the deposits or blockages inside the capillary tube.

[0007] Advantages of this device: This device has a simple and reasonable structure, is safe and convenient to use, has low cost, and has a good cleaning effect. It can perform automatic cleaning or manual pressurized rinsing, and is suitable for complex and diverse operating environments and various cleaning needs in scientific research laboratories. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this device.

[0009] Figure 2 yes Figure 1 A backward view diagram. Detailed Implementation

[0010] See Figure 1 , Figure 2 A push-type quartz capillary cleaning device includes a needle tail tube 1 and a needle tube 2 that matches the needle tail tube 1. The needle tail tube 1 is a tapered tube with openings at both ends along its axial direction. The end closer to the smaller diameter opening along the axial direction of the needle tail tube 1 is designated as the front, and the end closer to the larger diameter opening is designated as the rear. An elastic plug 11 is provided at the front of the needle tail tube 1. The circumferential outer wall of the elastic plug 11 mates with the needle tail tube 1. A through hole 111 is provided in the middle of the elastic plug 11, penetrating it along its axial direction. The needle tube 2 is arranged horizontally along the front-rear direction and includes a hollow... The cylinder 21 and the piston assembly 22 that cooperates with the empty cylinder 21 are provided. The empty cylinder 21 has a stopper 211 at the front (the stopper 211 is the nipple on a conventional syringe) and two radially extending flanges 212 at the rear. The rear of the needle tail tube 1 is screwed to the stopper 211 of the empty cylinder 21. The piston assembly 22 includes a piston head 221, a piston shaft 222 and a piston handle 223 connected in sequence. The piston head 221 cooperates with the empty cylinder 21. Each flange 212 is provided with a rubber band 3. The other end of each rubber band 3 is connected to the piston handle 223.

[0011] The method of using this device is as follows: Separate the needle tail tube 1 from the needle tube 2 and remove the rubber band 3 from the needle tube 2. Insert one end of the quartz capillary tube, which is open at both ends, into the elastic sealing plug 11 from front to back through the through hole 111. At this time, the elastic sealing plug 11 is in the state of replacing the capillary tube. Then, pull the piston handle 223 to draw the cleaning fluid (liquid / gas) into the empty cylinder 21, and then screw it to the needle tail tube 1 to fix it. Then, install the stretched rubber band 3 between the flange 212 and the piston handle 223. The rebound force of the rubber band 3 pushes the piston to... As the fluid in the empty cylinder 21 is pressurized, it enters the needle tail tube 1 from the plug 211. The pressurized fluid pushes the elastic plug 11 of the capillary ring, causing it to extend radially—closing the gap between it and the outer wall of the capillary and the inner wall of the needle tail tube 1, thus achieving airtight pressurization and pushing the fluid into the microchannel inside the capillary for cleaning. Alternatively, the piston handle 223 of the needle tube 2 can be manually pushed without the rubber band 3 to apply pressure, and the capillary can be placed in an ultrasonic cleaner to complete the flushing of the deposits or blockages inside the capillary.

[0012] Advantages of this device: This device has a simple and reasonable structure, is safe and convenient to use, has low cost, and has a good cleaning effect. It can perform automatic cleaning or manual pressurized rinsing, and is suitable for complex and diverse operating environments and various cleaning needs in scientific research laboratories.

[0013] In this application, the preparation of the needle tail tube and needle tube is as follows: Take a 5mL screw-type plastic syringe (with needle), cut off the syringe needle from the root of the embedded needle tube, and retain the rear needle tail tube; take a laboratory rubber stopper, cut to obtain a micro rubber stopper slightly larger than the front end of the needle tail tube, push it from the rear end of the needle microtube to the front end and slightly protrude from the front end to form an elastic seal; forcefully penetrate this elastic seal with a 320-micrometer outer diameter quartz capillary (with a polyester coating on the outer wall) to make it have a through hole through which the capillary can pass. Heat the front tip with a soldering gun, and cut two oppositely arranged semi-circular first grooves 4 on each flange of the syringe; also cut a pair of slightly larger semi-circular second grooves 5 on the piston handle; prepare two annular rubber bands to wrap around the two first grooves on the two flanges and the second grooves on the piston handle respectively, thus completing the preparation.

Claims

1. A push-type quartz capillary cleaning device, characterized in that: The device includes a needle tip and a matching needle tube. The needle tip is a tapered tube with openings at both ends along its axial direction. The end closer to the smaller diameter opening along the axial direction of the needle tip is designated as the front, and the end closer to the larger diameter opening is designated as the rear. An elastic plug is provided at the front of the needle tip, and the circumferential outer wall of the elastic plug mates with the needle tip. A through hole is provided in the middle of the elastic plug, extending along its axial direction. The needle tube is arranged horizontally along the front-rear direction and includes an empty cylinder and a piston assembly that mates with the empty cylinder. A plug is provided at the front of the empty cylinder, and two radially extending flanges are provided at the rear of the empty cylinder. The rear of the needle tip is screwed onto the plug of the empty cylinder. The piston assembly includes a piston head, a piston shaft, and a piston handle connected in sequence. The piston head mates with the empty cylinder, and each flange has a rubber band, the other end of which is connected to the piston handle.

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