CN203147138U - Capillary connector - Google Patents

Abstract

The utility model provides a capillary connector. The capillary connector includes a first tapered tube, a second tapered tube and a heat-shrinkable tube made of plastic. The first tapered tube and the second tapered tube have the same structure. The first tapered tube and the second tapered tube each have a small end and a large end, the small end of the first tapered tube seamlessly connects with the small end of the second tapered tube, and the large end of the first tapered tube The big end of the second tapered tube is used to connect the capillary respectively. The heat-shrinkable tube is sleeved at the central butt joint and heat-shrunk on the outer wall of the first tapered tube and the second tapered tube. The above-mentioned capillary connector can also be integrally formed . The capillary connector provided by the utility model has simple processing technology and low production cost, and utilizes the soft contact between the plastic material and the capillary to reduce the breakage probability of the capillary, thereby improving the plugging of the connector.

Description

A capillary connector

technical field

The utility model relates to a capillary connector.

Background technique

Capillary usually refers to a thin tube with an inner diameter equal to or less than 1 mm. It is called a capillary because its diameter is as thin as a hair. It is widely used in fields such as medicine and construction. Various, by searching Chinese patent application cases, using "capillary" and "connection" as keywords, the application number is 200910059327.5, and the invention name is the application document of quartz capillary column connection method and device. The application document provides A capillary chromatographic column connection device whose inner wall has undergone chemical treatment, the device adopts a section of quartz capillary column whose inner diameter is larger than the outer diameter of two quartz capillary chromatographic columns or whose outer diameter is smaller than the inner diameter of two quartz capillary chromatographic columns, and whose length is 10mm~100mm , the inner wall of which is treated with chemical inertness, the ends of the two chromatographic columns are respectively inserted or inserted from the two ends of the connecting device, and connected at the midpoint of the connecting device, and the two ends of the connecting device are coated with high-temperature glue to seal and stick to the chromatographic column . Although the dead volume of the connection device in the present invention is zero and has no adsorption on the sample components, the processing technology is complicated and the cost is high due to the use of quartz as the material of the connection device, and the open end of the connector is relatively thin, so it is not easy to The capillary is inserted and its material is relatively hard. When it comes into contact with the capillary, it is easy to break the capillary, which will cause the connector to be blocked and cannot be used normally.

As shown in Figure 1 and Figure 2, the entity is the existing capillary connector 1` provided by Sigma-Aldrich Company. The connector is integrally formed, made of glass, and has a cavity inside. 13` and 13` are respectively used to connect the capillary, and the capillary at both ends is docked at the diameter 12` in the middle of the cavity. Due to the limitation of the outer diameter of the capillary 1`, the diameter of the middle diameter 12` cannot be enlarged, and the existing processing technology is relatively complicated. , the cost is high, and the open end at both ends of the entity is the insertion port of the capillary. As can be seen from Figure 2, the insertion port is relatively thin, and it is not easy to insert the capillary. Moreover, the material of the glass is relatively hard, and the contact with the capillary is rigid. It is easy to cause the breakage of the capillary tube, and at the same time, it can be seen that the middle connecting section is thinner, which will also cause the blockage of the connector, and cause the capillary connector to be scrapped.

Utility model content

The purpose of the utility model is to provide a capillary connector, which aims to solve the problem that the existing connector has complex processing technology, high cost, and the opening of the connection end with the capillary is thinner, it is not easy to insert the capillary, and the material hardness of the connector is relatively high. , When in contact with the capillary, it is easy to break the capillary, which will cause the problem of connector blockage.

In order to solve the above technical problems, the utility model is achieved in this way, a capillary connector, comprising: a first tapered tube and a second tapered tube made of plastic material, the small end of the first tapered tube and the The small ends of the second tapered tubes are connected seamlessly.

Specifically, the small end of the first tapered tube and the small end of the second tapered tube have the same end surface shape and size, and the junction of the two is glued and sealed.

Further, a heat-shrinkable tube is further included, and the heat-shrinkable tube is sheathed and sealed on the outer side walls of the small end of the first tapered tube and the small end of the second tapered tube.

Or, further, the first tapered tube and the second tapered tube are integrally formed.

Preferably, the taper of the first tapered tube and/or the second tapered tube is 5°-10°.

Preferably, the inner diameter of the small end of the first tapered tube is 100-200 microns, and the inner diameter of the large end is 350-2000 microns.

Preferably, the inner diameter of the small end of the second tapered tube is 100-200 microns, and the inner diameter of the large end is 350-2000 microns.

Preferably, the inner diameter of the small end of the first tapered tube is 100-200 microns, and the inner diameter of the large end is 350-2000 microns; the inner diameter of the small end of the second tapered tube is 100-200 microns, and the inner diameter of the large end is 350~2000 microns.

Compared with the prior art, the capillary connector provided by the utility model adopts a tapered structure, which enlarges the open end connected with the capillary, and the capillary is more easily inserted into the connector, and the flexible connection with the capillary is realized by using plastic material. Sexual contact reduces the probability of capillary breakage, and the overall structure is simple and easy to process. On the premise of satisfying the function of use, it can greatly reduce the cost of purchase and use.

Description of drawings

Fig. 1 is a schematic structural view of a capillary connector provided in the prior art;

Fig. 2 is a schematic sectional view along the A-A direction in Fig. 1;

Fig. 3 is a schematic diagram of the three-dimensional structure of the capillary connector provided by the utility model;

Fig. 4 is a schematic structural view of the capillary connector provided by the utility model;

Fig. 5 is a schematic sectional view along the B-B direction in Fig. 4;

Fig. 6 is a schematic structural view of the first tapered tube of the capillary connector provided by the utility model;

Fig. 7 is a schematic structural view of the second tapered tube of the capillary connector provided by the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The utility model provides a capillary connector, which comprises a first tapered tube, a second tapered tube and a heat-shrinkable tube made of plastic, the first tapered tube and the second tapered tube have a small end and a large end respectively , the small end of the first tapered tube is seamlessly connected with the small end of the second tapered tube, the large end of the first tapered tube and the large end of the second tapered tube are respectively used to connect the capillary, heat shrinkable tube Sleeved at the seamless joint, heat-shrunk on the outer walls of the first tapered tube and the second tapered tube, the above-mentioned capillary connector can also be integrally formed.

In the utility model, since the first tapered tube and the second tapered tube are connected seamlessly, a sealant is used for curing and gluing at the seam, and the heat-shrinkable tube is sleeved at the connection position for sealing, so the structure is simple. No complicated processing technology is required, and the soft contact between the plastic material and the capillary tube reduces the probability of capillary tube breakage, thereby improving the situation of connector blockage.

The realization of the utility model is described in detail below in conjunction with specific drawings.

As shown in Figures 3 to 7, it is a preferred embodiment of the utility model.

Please refer to Fig. 3 to Fig. 7, above-mentioned capillary connector 1 comprises the first conical tube 11 and the second conical tube 12 and heat-shrinkable tube 13 that are made of plastics, and the first conical tube 1 has small end 110 and large end 120, the second tapered pipe 12 has a small end 210 and a large end 220, wherein the small end 110 of the first tapered pipe 11 communicates with the small end 210 of the second tapered pipe 12 at the center joint 14, the second The big end 120 of the first tapered tube 11 and the big end 220 of the second tapered tube 12 are respectively used to connect the capillaries at both ends. The heat-shrinkable tube 13 is sleeved on the center joint 14 , and is heat-shrunk on the outer walls of the first tapered tube 11 and the second tapered tube 12 under the action of a heat source.

Please refer to Figure 5. The capillary tubes inserted at both ends are in contact with the central butt joint 14 of the capillary connector 1, and the central butt joint 14 is glued with curing glue. Be careful not to apply the curing glue to the inner diameter of the central butt joint 14 , because the cured glue remains on the inner wall, causing the connector to be blocked and cannot be used normally. Of course, other connection methods can also be used, such as clip connection or screw connection.

Wherein, in this embodiment, the first tapered pipe 11 and the second tapered pipe 12 have the same structure and shape and size, so it can be guaranteed that at the central butt joint 14, the first tapered pipe 11 and the second tapered pipe 12 seamless after connection, and the connection is smooth.

In this embodiment, the heat-shrinkable tube 13 is used to seal the surface of the central joint 14, so that the liquid in the capillary is not easy to leak, so that the experimental analysis is not affected by external substances, and the accuracy of the experimental results is guaranteed.

Of course, if processing conditions permit, the capillary connector 1 can be integrally formed to further ensure the tightness of the connection.

Please refer to Fig. 6 and Fig. 7, the taper of two tapered tubes of described first tapered tube 11, the taper of described second tapered tube 12 can be identical, also can be different, and it is determined by the tube of the capillary that participates in experimental analysis. The diameter and analysis object are determined, and the taper is not easy to be too large. The value range is preferably 5°~10°. Otherwise, the effective length of the capillary embedded in the connector 1 will be too short, resulting in part of the contact with the air, resulting in inaccurate experimental results. , the value of the taper as far as possible to ensure the effective length of the capillary inserted into the connector; in this embodiment, the taper of the first tapered tube 11 and the second tapered tube 12 are selected C=1:10.

可知，

其中L为锥体长度。The value range of the inner diameter of the small end 110 of the first tapered tube 11 is 100-200 microns, and the value range of the inner diameter of the large end 120 is 350-2000 microns. Specifically, in this embodiment, the selected small end 110 inner diameter d is 200 microns, the inner diameter D of the big end 120 is 500, according to the taper formula,

It can be seen that

where L is the length of the cone.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (8)

1. A capillary connector, characterized in that it comprises: a first tapered tube and a second tapered tube made of plastic material, the small end of the first tapered tube and the second tapered tube The little endian connects seamlessly. 2. The capillary connector according to claim 1, wherein the small end of the first tapered tube is the same in shape and size as the small end of the second tapered tube, and the junction of the two is Glued to seal the connection. 3. The capillary connector according to claim 2, further comprising a heat-shrinkable tube sleeved between the small end of the first tapered tube and the second tapered tube On the outer side wall of the small end and seal. 4. The capillary connector according to claim 1, wherein the first tapered tube and the second tapered tube are integrally formed. 5. The capillary connector according to any one of claims 1 to 4, characterized in that, the taper of the first tapered tube and/or the second tapered tube is 5°-10°. 6. The capillary connector according to claim 5, wherein the inner diameter of the small end of the first tapered tube is 100-200 microns, and the inner diameter of the large end is 350-2000 microns. 7. The capillary connector according to claim 5, wherein the inner diameter of the small end of the second tapered tube is 100-200 microns, and the inner diameter of the large end is 350-2000 microns. 8. A capillary connector as claimed in claim 5, wherein the inner diameter of the small end of the first tapered tube is 100-200 microns, and the inner diameter of the large end is 350-2000 microns; The inner diameter of the small end of the shaped tube is 100-200 microns, and the inner diameter of the large end is 350-2000 microns.

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