Plastic capillary tube

Abstract

The utility model belongs to the technical field of capillary tubes, and particularly relates to a plastic capillary tube which comprises a capillary tube body on the upper portion, a capillary tube body on the lower portion and a connector in the middle, the connector is composed of a shell, two sets of sealing insertion tubes, two sets of pressing tubes and two sets of sliding positioning tubes, and the butt joint positions of the capillary tube bodies and the sealing insertion tubes can be sealed through sealing assemblies. The capillary tube bodies are pressed by the pressing assembly, falling of the capillary tube bodies is avoided, sealing butt joint of the two sets of capillary tube bodies is achieved, special tools and special clamping sleeves do not need to be arranged, the installation steps are simple, the operation difficulty is small, and the installation efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of capillaries, in particular to a plastic capillary. Background Art

[0002] PEEK capillary tubes have excellent properties such as high toughness, high strength, and corrosion resistance. They can be used in solvents for a long time. Since PEEK capillary tubes themselves are resistant to hydrolysis, they can be cleaned and disinfected in high-temperature steam. PEEK capillary tubes are formed by continuous extrusion process, with good dimensional stability. They can be continuously extruded for thousands of meters without breaking. They are widely used in analytical instruments, petrochemicals, medical equipment and other industries.

[0003] The preparation method of PEEK catheter is as follows: the raw materials mixed with PEEK are melt blended through an extruder and extruded through a single-cavity die. After the extrusion die, the raw materials enter a vacuum water tank for vacuum sizing (i.e., after the extrusion die, they pass through a sizing die). After sufficient cooling, they are continuously extruded by a traction machine to obtain a single-cavity PEEK catheter. In short, the single-cavity catheter is directly drawn without controlling the inner diameter of the cavity, and is directly shaped by a vacuum sizing die. For single-cavity catheters, this process is relatively mature.

[0004] In the process of capillary water distribution or collection, the connection of two sets of capillaries is a key link. The traditional connection method is to use a one-to-two or one-to-many joint to connect the capillary. When connecting, a special tool is required to push the joint into the pipe, and a special ferrule is used to hold the outer wall of the capillary to achieve the docking of the two sets. However, this connection method requires special tools and special ferrules, the installation steps are complicated, the operation is difficult, the installation efficiency is low, and the production cost and installation cost are relatively high. In order to facilitate the docking of two sets of capillaries, we propose a plastic capillary. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a plastic capillary, which can seal the joint between the capillary body and the sealing insert through a sealing component, and the pressing component presses the capillary body to prevent the capillary body from falling off, thereby achieving sealed docking of two groups of capillary bodies, avoiding the need for special tools and special ferrules, and having simple installation steps, low operating difficulty, high installation efficiency, and solving the background problem.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A plastic capillary comprises a capillary body at the upper and lower parts and a connector at the middle part, wherein the connector consists of an outer shell, two groups of sealing inserts, two groups of clamping tubes, and two groups of sliding positioning tubes. The two groups of sealing inserts are respectively fixedly connected to the two end parts of the outer shell, the two groups of clamping tubes are respectively fixedly connected to the two end parts of the outer shell, and the clamping tube sleeves are arranged on the outside of the sealing inserts, and the two groups of sliding positioning tubes are slidably sleeved above and below the outer surface of the outer shell, the clamping tubes are installed with a clamping assembly, and the sealing inserts are installed with a sealing assembly.

[0008] Preferably, the sealing assembly comprises a plurality of groups of rubber sealing rings, and the rubber sealing rings are fixedly sleeved on the outer surface of the sealing insert.

[0009] Preferably, the clamping assembly includes a plurality of annularly distributed clamping columns, which are slidably assembled on the outer surface of the clamping tube, and a conical tube portion is integrally connected to the sliding positioning tube. Two sets of springs are mounted on the outer surface of the outer shell, one end of the spring is fixedly connected to the outer shell, and the other end of the spring is fixedly connected to the inner wall of the sliding positioning tube.

[0010] Preferably, the capillary body is made of PEEK special engineering plastic material.

[0011] Preferably, the outer surface of the sliding positioning tube and the outer surface of the shell are both provided with anti-slip textures.

[0012] Preferably, the capillary body is tightly inserted into the outside of the sealing insert, and the inner wall of the capillary body is in close contact with the rubber sealing ring. Beneficial Effects

[0013] The utility model provides a plastic capillary tube. Compared with the prior art, it has the following beneficial effects:

[0014] 1. The plastic capillary can seal the joint between the capillary body and the sealing insert through the sealing component. The pressing component presses the capillary body to prevent the capillary body from falling off, thereby achieving sealed jointing of two groups of capillary bodies, avoiding the need for special tools and special ferrules, and having simple installation steps, low operating difficulty and high installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front view structure of the main body of the utility model;

[0016] Figure 2 This is a schematic diagram of the main body split structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the connector structure of the utility model from another perspective;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the connector of the utility model;

[0019] Figure 5 For the utility model Figure 4 A schematic diagram of the enlarged structure in the middle.

[0020] In the figure: 1, connector; 2, capillary body; 3, sealing insert; 4, rubber sealing ring; 5, tapered tube; 6, sliding positioning tube; 7, clamping column; 8, clamping tube; 9, spring; 10, housing. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5 The utility model provides a technical solution: a plastic capillary, comprising a capillary body 2 at the upper and lower parts and a connector 1 at the middle part, the connector 1 is composed of a shell 10, two groups of sealing inserts 3, two groups of clamping tubes 8, and two groups of sliding positioning tubes 6, the two groups of sealing inserts 3 are respectively fixedly connected to the two end parts of the shell 10, the two groups of clamping tubes 8 are respectively fixedly connected to the two end parts of the shell 10, and the clamping tubes 8 are sleeved on the outside of the sealing inserts 3, the two groups of sliding positioning tubes 6 are slidably sleeved on the upper and lower outer surfaces of the shell 10, the clamping tubes 8 are installed with a clamping assembly, and the sealing inserts 3 are installed with a sealing assembly.

[0023] When in use, the capillary body 2 is inserted into the outside of the sealing cannula 3, and a sealing component is installed on the sealing cannula 3. The sealing component will seal the joint between the capillary body 2 and the sealing cannula 3, and then the pressing component will press the capillary body 2 to prevent the capillary body 2 from falling off. Through the above steps, another group of capillary bodies 2 is installed on the connector 1 to achieve sealed docking of the two groups of capillary bodies 2, avoiding the need for special tools and special ferrules, and the installation steps are simple, the operation difficulty is small, and the installation efficiency is high.

[0024] The sealing assembly includes a plurality of rubber sealing rings 4, which are fixedly sleeved on the outer surface of the sealing insert 3. The rubber sealing rings 4 can be used to conveniently seal the joint between the capillary body 2 and the sealing insert 3.

[0025] The clamping assembly includes a plurality of annularly distributed clamping columns 7, which are slidably assembled on the outer surface of a clamping tube 8. A conical tube portion 5 is integrally connected to the sliding positioning tube 6. Two sets of springs 9 are mounted on the outer surface of the outer shell 10. One end of the spring 9 is fixedly connected to the outer shell 10, and the other end of the spring 9 is fixedly connected to the inner wall of the sliding positioning tube 6. Under the action of the spring 9, the sliding positioning tube 6 will be squeezed to move toward the sealing insert 3. Due to the presence of the conical tube portion 5, the conical tube portion 5 will squeeze the plurality of annularly distributed clamping columns 7 to move downward. Under the squeezing action of the spring 9, the plurality of clamping columns 7 will compress the capillary body 2 to prevent the capillary body 2 from falling off.

[0026] The capillary body 2 is made of PEEK special engineering plastic material. The PEEK capillary has excellent properties such as high toughness, high strength, and corrosion resistance.

[0027] The outer surface of the sliding positioning tube 6 and the outer surface of the housing 10 are both provided with anti-skid patterns to improve the anti-skid capability.

[0028] The capillary body 2 is tightly inserted into the outside of the sealing insert 3 , and the inner wall of the capillary body 2 is in tight contact with the rubber sealing ring sheet 4 .

[0029] Working principle: when in use, push the sliding positioning tube 6 inward to separate the tapered tube portion 5 from the clamping column 7, and then insert the capillary body 2 into the outside of the sealing insert 3. The sealing insert 3 is provided with a rubber sealing ring piece 4, which will seal the joint between the capillary body 2 and the sealing insert 3. Then release the sliding positioning tube 6. Under the action of the spring 9, the sliding positioning tube 6 will be squeezed to move toward the sealing insert 3. Due to the presence of the tapered tube portion 5, the tapered tube portion 5 will squeeze a number of annularly distributed clamping columns 7 to move downward. Under the squeezing action of the spring 9, a number of clamping columns 7 will clamp the capillary body 2, thereby preventing the capillary body 2 from falling off. Through the above steps, another group of capillary bodies 2 is installed on the connector 1 to achieve sealed docking of the two groups of capillary bodies 2, avoiding the need for special tools and special ferrules. The installation steps are simple, the operation difficulty is small, and the installation efficiency is high.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic capillary tube, comprising a capillary tube body (2) at the upper and lower parts and a connector (1) at the middle part, characterized in that: The connector (1) is composed of a housing (10), two groups of sealing inserts (3), two groups of clamping tubes (8), and two groups of sliding positioning tubes (6). The two groups of sealing inserts (3) are respectively fixedly connected to the two end portions of the housing (10), the two groups of clamping tubes (8) are respectively fixedly connected to the two end portions of the housing (10), and the clamping tubes (8) are sleeved on the outside of the sealing inserts (3). The two groups of sliding positioning tubes (6) are slidably sleeved above and below the outer surface of the housing (10), the clamping tubes (8) are installed with a clamping assembly, and the sealing inserts (3) are installed with a sealing assembly.

2. A plastic capillary according to claim 1, characterized in that: The sealing assembly comprises a plurality of groups of rubber sealing ring sheets (4), wherein the rubber sealing ring sheets (4) are fixedly sleeved on the outer surface of the sealing insert (3).

3. A plastic capillary according to claim 2, characterized in that: The clamping assembly comprises a plurality of annularly distributed clamping columns (7), wherein the clamping columns (7) are slidably mounted on the outer surface of a clamping tube (8), the sliding positioning tube (6) is integrally connected with a conical tube portion (5), and the outer surface of the outer shell (10) is sleeved with two groups of springs (9), one end of the spring (9) is fixedly connected to the outer shell (10), and the other end of the spring (9) is fixedly connected to the inner wall of the sliding positioning tube (6).

4. A plastic capillary according to claim 3, characterized in that: The capillary body (2) is made of PEEK special engineering plastic material.

5. A plastic capillary according to claim 4, characterized in that: The outer surface of the sliding positioning tube (6) and the outer surface of the outer shell (10) are both provided with anti-slip textures.

6. A plastic capillary according to claim 5, characterized in that: The capillary body (2) is tightly inserted into the outside of the sealing insert (3), and the inner wall of the capillary body (2) is in tight contact with the rubber sealing ring sheet (4).

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