A coaxial needle mounting connector and a coaxial needle assembly

Abstract

The utility model discloses a kind of coaxial needle mounting connector and coaxial needle assembly, it is related to nitrogen blowing instrument technical field, including connector main body, the first through hole being set on the connector main body axial penetration, the second through hole being set on the circumference of connector main body and the first through hole intercommunication;The one end of connector main body is provided with connecting thread, and connecting thread is located on the hole wall of first through hole or the outer wall of connector main body.The utility model makes coaxial needle when needing installation can be directly installed on flow divider and used, so that coaxial needle and flow divider do not need pipeline connection between, make multiple coaxial needle commonly arranged structure more simple, make the production cost of equipment lower.

Description

Technical Field

[0001] This utility model relates to the field of nitrogen blowing instrument technology, and more specifically, to a coaxial pin mounting connector and a coaxial pin assembly. Background Technology

[0002] Nitrogen blow concentrators are versatile products that utilize heating and auxiliary nitrogen blowing to concentrate samples, and they have a broad market demand. They can be widely used in environmental protection, medicine and health, pharmaceuticals, disease control centers, petroleum, chemical industry, commodity inspection, food safety, aquaculture, agriculture, biology, and university research.

[0003] Nitrogen blowing concentrators are a commonly used sample pretreatment technique, most commonly using water as the liquid bath medium. The working principle involves placing a concentration cup containing the liquid sample in a water bath. Heating the liquid in the water bath transfers heat to the concentration cup, increasing the evaporation rate of the liquid sample by raising its temperature. Simultaneously, an inert gas (nitrogen) is continuously blown onto the liquid surface of the concentration cup through a nitrogen blowing needle. This serves two purposes: firstly, to prevent sample medium loss during concentration; and secondly, the nitrogen gas naturally settles, facilitating the removal of gases generated during evaporation and thus accelerating the concentration process.

[0004] However, the gas path structure of current nitrogen evaporators on the market can only complete the function of nitrogen injection, but cannot complete the sampling of the evaporated gas mixture. In order to complete the sampling of the evaporated gas mixture while purging nitrogen, a coaxial needle is often used. One gas path of the coaxial needle blows nitrogen, and the other gas path of the coaxial needle collects the evaporated gas mixture. At the same time, in order to facilitate the connection of the two gas paths, the existing coaxial needles have one connector located at the top of the coaxial needle and the other connector located on the side of the coaxial needle. Although this design can realize the blowing of nitrogen and the collection of the evaporated gas mixture, since there are generally multiple nitrogen purging needles evenly arranged on the nitrogen purifier, if the two connectors on each nitrogen purging needle are connected to the connecting pipeline, it will not only make the entire pipeline system structure complex, but also increase the production cost of the equipment.

[0005] Therefore, there is an urgent need for a coaxial pin mounting connector and coaxial pin assembly that can be directly used with a flow divider valve. Utility Model Content

[0006] The purpose of this utility model is to provide a coaxial pin mounting connector and coaxial pin assembly, which allows the coaxial pin to be directly installed on the diverter valve, thereby eliminating the need for pipeline connection between the coaxial pin and the diverter valve, simplifying the structure when multiple coaxial pins are arranged together, and reducing the production cost of the equipment.

[0007] To achieve the purpose of this utility model, the technical solution adopted is as follows: a coaxial pin mounting connector, including a connector body, a first through hole axially through the connector body, and a second through hole communicating with the first through hole on the circumferential surface of the connector body; one end of the connector body is provided with a connecting thread, which is located on the hole wall of the first through hole or on the outer wall of the connector body.

[0008] Furthermore, the outer circular surface of the connector body is also fitted with multiple sealing rings, which are located on both sides of the second through hole.

[0009] Furthermore, an annular groove is formed on the outer circular surface of the connector body, and the outer end of the second through hole is located inside the annular groove.

[0010] Furthermore, the outer wall of the connector body is divided into three sections, with the annular groove located in the middle section of the connector body.

[0011] Furthermore, the diameter of the outer wall of the connector body gradually decreases, and the connecting thread is located at the small diameter end of the connector body, while the large diameter end of the connector body is also provided with anti-slip texture.

[0012] Furthermore, the first through hole is a stepped hole, and the small diameter section of the first through hole corresponds to the connecting thread, while the large diameter section of the first through hole corresponds to the second through hole.

[0013] A coaxial pin assembly, including the coaxial pin mounting connector as described above.

[0014] The beneficial effects of this utility model are:

[0015] In use, this utility model only requires installing the coaxial needle in the first through hole, ensuring that the inner tube of the coaxial needle is connected to the outlet end of the first through hole, and the outer tube of the coaxial needle is connected to the second through hole. Finally, the connector body is connected to the diverter valve, so that the outlet ends of the second through hole and the first through hole are respectively connected to the two air passages of the diverter valve. This eliminates the need for pipeline connections between the coaxial needle and the diverter valve, simplifies the structure when multiple coaxial needles are arranged together, and reduces the production cost of the equipment. Attached Figure Description

[0016] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0017] Figure 1 This is a structural diagram of the coaxial pin mounting connector provided by this utility model;

[0018] Figure 2 This is a cross-sectional view of the coaxial pin mounting connector provided by this utility model;

[0019] Figure 3 This is a cross-sectional view of the coaxial pin assembly provided by this utility model.

[0020] The attached diagram shows the markings and corresponding component names:

[0021] 1. Coaxial pin mounting connector; 2. Coaxial pin;

[0022] 1-1. Connector body; 1-2. First through hole; 1-3. Second through hole; 1-4. Annular groove; 1-5. Sealing ring; 1-6. Connecting thread; 1-7. Anti-slip texture.

[0023] 2-1. Outer tube; 2-2. Inner tube; 2-3. Air inlet. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0025] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 , Figure 2 As shown, the present invention provides a coaxial pin mounting connector, including a connector body 1-1. A first through hole 1-2 is provided on the connector body 1-1. The axial direction of the first through hole 1-2 is consistent with the axial direction of the connector body 1-1, and the two ends of the first through hole 1-2 pass through the two ends of the connector body 1-1 respectively. At the same time, a second through hole 1-3 is also provided on the connector body 1-1. The axial direction of the second through hole 1-3 is consistent with the radial direction of the connector body 1-1. The inner end of the second through hole 1-3 communicates with the first through hole 1-2, and the outer end of the second through hole 1-3 passes through the circumferential surface of the connector body 1-1.

[0027] To facilitate the installation of the connector body 1-1 onto the diverter valve, a connecting thread 1-6 is provided at the end of the connector body 1-1 away from the coaxial pin 2. This connecting thread 1-6 is located on the outer wall of the connector body 1-1 and is an external thread. When the connector body 1-1 needs to be installed, it can be directly tightened and fixed onto the diverter valve, making the installation of the connector body 1-1 faster and more convenient. In this invention, when the installation port on the diverter valve for installing the connector body 1-1 has an external thread, the connecting thread 1-6 on the connector body 1-1 can also be an internal thread. That is, the selection of the connecting thread 1-6 on the connector body 1-1 can be determined according to the thread at the installation port on the diverter valve, thereby ensuring that the installation of the connector body 1-1 is more convenient.

[0028] To ensure a better seal between the connector body 1-1 and the diversion valve when the connector body 1-1 is installed on the diversion valve, at least a plurality of sealing rings 1-5 are fitted on the outer circumferential surface of the connector body 1-1. These sealing rings 1-5 are divided into two groups, located on either side of the second through hole 1-3. This prevents gas leakage through the first through hole 1-2 and the second through hole 1-3 from the gap between the outer wall of the connector body 1-1 and the installation port of the diversion valve when the connector body 1-1 is installed on the diversion valve. This ensures both the nitrogen blowing volume and the amount of collected evaporated mixed gas. In this invention, the sealing rings 1-5 can be two, three, four, etc., and the specific selection of the sealing rings 1-5 can be determined according to the actual situation.

[0029] When the connector body 1-1 is installed on the diverter valve, in order to ensure the communication between the diverter valve and the second through hole 1-3, an annular groove 1-4 is also provided on the outer wall of the connector body 1-1. The outer end of the second through hole 1-3 is located in the annular groove 1-4. When the connector body 1-1 is installed on the diverter valve, the annular groove 1-4 and the installation port on the diverter valve cooperate to form an annular chamber, so that the second through hole 1-3 and the flow channel on the diverter valve can be connected through the annular chamber. This makes it possible for the connector body 1-1 to be installed without the need for precise alignment between the second through hole 1-3 and the flow channel on the diverter valve, making the installation of the connector body 1-1 faster and more convenient.

[0030] To facilitate the installation of the connector body 1-1, its outer wall can be designed as a three-section structure. The outer diameter of the connector body 1-1 gradually increases from the end installed on the diverter valve to the end where the coaxial pin 2 is installed. The annular groove 1-4 is located on the middle section of the connector body 1-1, and the connecting thread 1-6 is located on the small diameter section of the connector body 1-1. During installation, the small diameter section and the middle section of the connector body 1-1 are located inside the installation port of the diverter valve, while the large diameter section of the connector body 1-1 is located outside the installation port of the diverter valve, making it convenient for workers to hold the large diameter section of the connector body 1-1 for installation or removal. To prevent workers from slipping their hands while tightening the connector body 1-1, anti-slip grooves 1-7 are also provided on the large diameter section of the connector body 1-1.

[0031] Since the outer wall of the connector body 1-1 has a three-section structure, when installing the sealing rings 1-5 fitted on the connector body 1-1, one set of sealing rings 1-5 can be directly fitted onto the small diameter section of the connector body 1-1. The connection between the small diameter section of the connector body 1-1 and the middle section of the connector body 1-1 restricts the sealing rings 1-5 to prevent axial displacement of the sealing rings 1-5 on the connector body 1-1. At the same time, in order to facilitate the installation of the other set of sealing rings 1-5, a sealing ring groove 1-4 for installing the other set of sealing rings 1-5 is opened on the middle section of the connector body 1-1, and the sealing rings 1-5 are embedded in the sealing ring groove 1-4.

[0032] To facilitate the installation of the coaxial pin 2 on the connector body 1-1, the first through hole 1-2 on the connector body 1-1 is a stepped hole. The small diameter end of the first through hole 1-2 corresponds to the end of the connector body 1-1 that is installed on the diverter valve, and the large diameter end of the first through hole 1-2 corresponds to the second through hole 1-3. When the coaxial pin 2 needs to be installed, the inner tube 2-2 in the coaxial pin 2 is fixed in the small diameter end of the first through hole 1-2, and the outer tube 2-1 in the coaxial pin 2 is fixed in the large diameter end of the first through hole 1-2. After the coaxial pin 2 is installed in the first through hole 1-2, there is a certain gap between the outer tube 2-1 in the coaxial pin 2 and the inner tube 2-2 in the coaxial pin 2, ensuring that the coaxial pin 2 can be used normally while being installed.

[0033] like Figure 3As shown, this embodiment also provides a coaxial pin assembly, including the coaxial pin mounting connector 1 and coaxial pin 2 as described above. The coaxial pin 2 includes an inner tube 2-2 and an outer tube 2-1 arranged coaxially and radially. The inner tube 2-2 is located inside the outer tube 2-1. The inner tube 2-2 is used to blow nitrogen outward, and the outer tube 2-1 is used to pump and evaporate the mixed gas. One end of the inner tube 2-2 is installed in the small diameter end of the first through hole 1-2. After the inner tube 2-2 is installed, the mounting end of the inner tube 2-2 isolates the first through hole 1-2 from the second through hole 1-3. One end of the outer tube 2-1 is installed in the large diameter end of the first through hole 1-2. The mounting end of the outer tube 2-1 is lower than the second through hole 1-3, ensuring that the outer tube 2-1 is connected to the second through hole 1-3.

[0034] To prevent the nitrogen gas blown out from the inner tube 2-2 from being directly drawn into the evaporated gas mixture through the outer tube 2-1, the end of the outer tube 2-1 extending into the test tube is closed. Furthermore, multiple air inlets 2-3, communicating with the interior of the outer tube 2-1, are provided on its circumferential surface. These multiple air inlets 2-3 are arranged at intervals along the circumference of the outer tube 2-1. Alternatively, there can be multiple sets of air inlets 2-3 on the outer tube 2-1, with multiple air inlets 2-3 in the same set arranged at intervals along the circumference of the outer tube 2-1, or multiple sets of air inlets 2-3 arranged at intervals along the axis of the outer tube 2-1, with adjacent sets of air inlets 2-3 staggered. When it is necessary to draw the evaporated gas mixture generated during the concentration process, the evaporated gas mixture enters the outer tube 2-1 through the air inlets 2-3 and is finally discharged through the second through-hole 1-3.

[0035] To facilitate the insertion of the coaxial needle 2 into the test tube, the tip of the outer tube 2-1 is conical, and the tip of the outer tube 2-1 is flush with the tip of the inner tube 2-2. This allows the tip of the outer tube 2-1 to be welded onto the inner tube 2-2, thus achieving a seal and making the forming of the coaxial needle 2 more convenient.

[0036] When using the coaxial needle assembly, tighten the coaxial needle 2 mounting clamp onto the mounting port of the diverter valve. At this time, the inner tube 2-2 is connected to the nitrogen gas path on the diverter valve, and the second through hole 1-3 is connected to the evacuation gas path on the diverter valve. The nitrogen gas entering the nitrogen gas path of the diverter valve is blown into the test tube through the inner tube 2-2 to concentrate the reagent in the test tube. The vaporized mixed gas generated by the reagent in the test tube during concentration enters the outer tube 2-1 through the air inlet 2-3 on the outer tube 2-1, and is sent out through the second through hole 1-3 and then enters the evacuation gas path of the diverter valve.

[0037] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A coaxial pin mounting connector, characterized in that, The device includes a connector body (1-1), a first through hole (1-2) axially extending through the connector body (1-1), and a second through hole (1-3) communicating with the first through hole (1-2) on the circumferential surface of the connector body (1-1); one end of the connector body (1-1) is provided with a connecting thread (1-6), which is located on the hole wall of the first through hole (1-2) or on the outer wall of the connector body (1-1).

2. The coaxial pin mounting connector according to claim 1, characterized in that, The outer circular surface of the connector body (1-1) is also fitted with multiple sealing rings (1-5), which are located on both sides of the second through hole (1-3).

3. The coaxial pin mounting connector according to claim 1, characterized in that, The outer circular surface of the connector body (1-1) is provided with an annular groove (1-4), and the outer end of the second through hole (1-3) is located in the annular groove (1-4).

4. The coaxial pin mounting connector according to claim 1, characterized in that, The outer wall of the connector body (1-1) is divided into three sections, with the annular groove (1-4) located in the middle section of the connector body (1-1).

5. The coaxial pin mounting connector according to claim 1, characterized in that, The diameter of the outer wall of the connector body (1-1) gradually decreases, and the connecting thread (1-6) is located at the small diameter end of the connector body (1-1). The large diameter end of the connector body (1-1) is also provided with anti-slip texture (1-7).

6. The coaxial pin mounting connector according to claim 1, characterized in that, The first through hole (1-2) is a stepped hole, and the small diameter section of the first through hole (1-2) corresponds to the connecting thread (1-6), and the large diameter section of the first through hole (1-2) corresponds to the second through hole (1-3).

7. A coaxial pin assembly, characterized in that, Includes the coaxial pin mounting connector as described in any one of claims 1 to 6.

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