CN219110449U

CN219110449U - Double-connection mixed injector nozzle and device

Info

Publication number: CN219110449U
Application number: CN202223542809.6U
Authority: CN
Inventors: 郝卫国
Original assignee: Beijing Aatkang Medical Technology Co ltd
Current assignee: Beijing Aatkang Medical Technology Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-06-02
Anticipated expiration: 2032-12-28

Abstract

The utility model belongs to the technical field of medical appliances, and particularly relates to a dual mixing injector nozzle and a device. The dual-connection mixing injection device comprises a spray head, wherein the spray head comprises a hollow cavity, one end of the hollow cavity is provided with a liquid inlet, the other end of the hollow cavity is provided with a spray outlet, a nozzle core, a gas-liquid mixing chamber and a sheath tube are arranged in the hollow cavity, and two ends of the gas-liquid mixing chamber are respectively connected with the sheath tube and the nozzle core; the top of the nozzle core is provided with a liquid storage tank, the liquid storage tank is positioned below the spray outlet, the outer side wall of the nozzle core is provided with a concave surface, and the concave surface and the inner side wall of the hollow cavity form a gas-liquid channel. The injection device with the spray head is favorable for realizing stable spraying of the gas-liquid mixture along the spray outlet in a spray mode and forming uniform coating on the wound surface, and the wound surface gel forming time is not more than 15s.

Description

Double-connection mixed injector nozzle and device

Technical Field

The utility model belongs to the technical field of medical appliances, and particularly relates to a dual mixing injector nozzle and a device.

Background

Currently, the syringes used clinically are mainly single barrel syringes and duplex hybrid syringes. Single-barrel syringes have difficulty achieving this when immediate mixing of two liquid medicaments is required in order to achieve a suitable therapeutic effect. For example, some hemostatic or tissue sealing gels are formed by a two-component mixing reaction, and because of the rapid increase in viscosity of the solution after mixing the two components, the solution must be applied immediately with mixing, otherwise it is difficult to effectively apply the same to the target site; in this case, a dual mixing syringe must be used.

However, the existing duplex mixing injector cannot realize uniform and effective coating on the wound surface in a relatively short time.

Disclosure of Invention

The technical aim of the utility model is to at least solve the problems that the duplex mixing injector in the prior art can not realize uniform and effective coating of the wound surface in a relatively short time, the wound surface has long gel forming time and the like.

The aim is achieved by the following technical scheme:

in a first aspect, the utility model discloses a duplex mixing injector nozzle, which comprises a hollow cavity, wherein one end of the hollow cavity is provided with a liquid inlet, the other end of the hollow cavity is provided with a spray outlet, a nozzle core, a gas-liquid mixing chamber and a sheath tube are arranged in the hollow cavity, and two ends of the gas-liquid mixing chamber are respectively connected with the sheath tube and the nozzle core;

the top of nozzle core is equipped with the reservoir, the reservoir is located the spraying export below, the lateral wall of nozzle core is equipped with the concave surface, the concave surface with the inside wall of hollow cavity forms the gas-liquid channel. Wherein, the nozzle core plays a role in drainage and shaping.

In some embodiments of the utility model, the liquid storage tank may be an arc-shaped groove, a square groove or a truncated cone-shaped groove.

In some embodiments of the utility model, the concave surface may be an arcuate concave surface or a concave surface of any other shape.

In some embodiments of the present utility model, the nozzle core is a flat solid core, and the flat solid core has two symmetrically distributed concave surfaces, and each concave surface is connected to the liquid storage tank, so that the gas-liquid mixture can flow into the liquid storage tank along the concave surface.

In some embodiments of the utility model, the lateral cross-sectional area of the reservoir tip is greater than the lateral cross-sectional area of the spray outlet.

The spray outlet is a circular hole, and the aperture of the circular hole is 0.01 mm-1 mm, preferably 0.02-0.06 mm. The circular hole with the aperture is beneficial to ensuring that gas-liquid mixed spray with certain pressure is generated at the spray outlet.

In some embodiments of the present utility model, an air inlet is further disposed on the hollow cavity, and the air inlet is disposed near the liquid inlet and forms different channels respectively.

In some embodiments of the present utility model, a spiral channel is provided in the gas-liquid mixing chamber, a gas-liquid outlet of the spiral channel is connected to the gas-liquid channel, and a gas-liquid inlet of the spiral channel is connected to the sheath tube. The gas-liquid mixture rotates in the spiral channel to accelerate movement, which is beneficial to uniform mixing of gas and liquid and acceleration movement.

In some embodiments of the utility model, the sheath comprises an infusion sheath, a gas delivery sheath, and a sizing channel arranged in parallel, wherein the sizing channel is internally provided with a metal wire for sizing. The gas delivery sheath is communicated with the gas inlet, the transfusion sheath is communicated with the liquid inlet, and gas and liquid with certain pressure are fully and uniformly mixed in the gas-liquid mixing chamber and form a vaporific gas-liquid mixture with uniform particle size distribution at the spray outlet.

In some embodiments of the present utility model, the infusion sheath tube and the gas delivery sheath tube are centered on the central axis of the shaping channel, and the transverse section of the infusion sheath tube and the gas delivery sheath tube is any one of a circular surface, a circular ring surface or a fan ring surface.

In a second aspect, the utility model discloses a duplex mixing injection device, which comprises the spray head of the first aspect, a duplex cylinder connected with the spray head, and a support frame for fixedly arranging the duplex cylinder.

In some embodiments of the present utility model, a claw for clamping with the spray head is provided at the top end of the support frame, and an elastic member is provided adjacent to the claw, and the elastic member is located in a groove arranged on the side wall of the support frame.

In some embodiments of the utility model, a base for connecting with the duplex cylinder is arranged at the bottom end of the supporting frame.

In some embodiments of the present utility model, a gas storage cavity is formed in the base, and a gas inlet and a gas outlet valve are arranged on the gas storage cavity. The utility model preferably inputs inert gas or air into the gas storage cavity, controls the air pressure in the gas storage cavity by the air outlet valve, further applies external force to the push-pull rod, and simultaneously, can realize the movement of the push-pull rod by directly applying external force to the push-pull rod.

The beneficial effects of the technical scheme disclosed by the utility model are mainly shown as follows:

the duplex mixing injector device designed by the utility model is beneficial to realizing that the gas-liquid mixture is stably sprayed out along the gas-liquid outlet in a spray form and forms uniform coating on the wound surface, and the wound surface gel forming time is not more than 15s.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 schematically shows a schematic structural diagram of a connection relationship between a duplex cylinder and a support frame according to an embodiment of the present utility model;

FIG. 2 schematically shows a schematic structural diagram of the connection relationship between the duplex cylinder and the support frame according to the embodiment of the utility model;

fig. 3 schematically shows a schematic structural view of a base of the support stand of fig. 1 or 2;

FIG. 4 schematically illustrates a cross-sectional view of a spray head;

FIG. 5 schematically illustrates a cross-sectional view of the nozzle core of FIG. 4;

FIG. 6 schematically illustrates a top view of the nozzle core of FIG. 4;

FIG. 7 schematically illustrates a schematic structural view of the spiral channel of FIG. 4;

FIG. 8 schematically illustrates a top view of the sheath of FIG. 4;

FIG. 9 schematically illustrates a schematic configuration of the connection of the showerhead, base, and external air supply.

Wherein, each reference numeral in the drawings indicates as follows:

100. a duplex cylinder; 100-1, a needle end;

200. a push-pull rod; 200-1, a base; 200-2, a first air inlet; 200-3, an air outlet valve; 200-4, an air storage cavity; 200-5, fixing grooves;

300. a support frame; 300-1, claw; 300-2, an elastic member; 300-3, grooves;

400. a connecting piece;

500. a spray head; 500-1, a second air inlet; 500-2, a first liquid inlet; 500-3, a second liquid inlet; 500-4, hollow cavity; 500-5, a spray outlet;

500-6, a nozzle core; 500-61, a liquid storage tank; 500-62, concave surface; 500-63, a gas-liquid channel;

500-7, a gas-liquid mixing chamber; 500-71, helical channels;

500-8, sheath tube; 500-81, transfusion sheath tube; 500-82, a gas transmission sheath tube; 500-83, shaping channel;

500-9, protruding parts;

600. a gas transmission pipeline.

Detailed Description

The duplex mixing injector in the prior art can not realize uniform and effective coating of the wound surface in a relatively short time, and the wound surface has long gel forming time.

In order to solve the technical problems, the utility model provides a spray head of a duplex mixing injector and a device, wherein the spray head of the duplex mixing injector adopts a gas-liquid combined infusion mode to realize spray of a vaporous mixture with certain pressure at a spray nozzle, wherein the vaporous mixture realizes uniform and stable coating at a wound surface, and the wound surface gel forming time is not more than 15s. And the length of the spray head can be flexibly adjusted according to clinical requirements, so that the requirements of different application scenes are met.

The first aspect of the utility model for realizing the technical effects is to disclose a duplex mixing injector nozzle, the nozzle comprises a hollow cavity, one end of the hollow cavity is provided with a liquid inlet, the other end of the hollow cavity is provided with a spray outlet, a nozzle core, a gas-liquid mixing chamber and a sheath tube are arranged in the hollow cavity, and two ends of the gas-liquid mixing chamber are respectively connected with the sheath tube and the nozzle core; and the top end of the nozzle core is provided with a liquid storage tank, the liquid storage tank is positioned below the spray outlet, the outer side wall of the nozzle core is provided with a concave surface, and the concave surface and the inner side wall of the hollow cavity form a gas-liquid channel. Wherein, the nozzle core plays a role in drainage and shaping.

In some embodiments, the two liquid inlets are respectively used for conveying a first mixed liquid formed by the first component and a second mixed liquid formed by the second component.

In some embodiments, the reservoir may be an arcuate groove or a square groove or a frustoconical groove.

In some embodiments, the concave surface may be an arcuate concave surface or a concave surface of any other shape.

In some embodiments, the nozzle core is a flat solid core, the flat solid core has two symmetrically distributed concave surfaces, and each concave surface is connected with the liquid storage tank, so that the gas-liquid mixture can flow into the liquid storage tank along the concave surface conveniently.

In some embodiments, the lateral cross-sectional area of the reservoir tip is greater than the lateral cross-sectional area of the spray outlet.

In some embodiments, the hollow cavity is further provided with an air inlet, and the air inlet is arranged close to the liquid inlet and forms different channels respectively.

In some embodiments, a spiral channel is arranged in the gas-liquid mixing chamber, a gas-liquid outlet of the spiral channel is connected with the gas-liquid channel, and a gas-liquid inlet of the spiral channel is connected with the sheath tube. The gas-liquid mixture rotates in the spiral channel to accelerate movement, which is beneficial to uniform mixing of gas and liquid and acceleration movement.

In some embodiments, the sheath comprises an infusion sheath, a gas delivery sheath, and a sizing channel arranged side by side, the sizing channel having a wire disposed therein for sizing. The gas delivery sheath is communicated with the gas inlet, the transfusion sheath is communicated with the liquid inlet, and gas and liquid with certain pressure are fully and uniformly mixed in the gas-liquid mixing chamber and form a vaporific gas-liquid mixture with uniform particle size distribution at the spray outlet.

In some embodiments, the infusion sheath tube and the gas delivery sheath tube are centrosymmetric with respect to a central axis of the shaping channel, and the transverse section of the infusion sheath tube and the gas delivery sheath tube is any one of a circular surface, a circular ring surface or a fan ring surface.

The second aspect of the present utility model for achieving the above technical effects is to disclose a duplex mixing injection device, which comprises the spray head of the first aspect, a duplex cylinder connected with the spray head, and a support frame for fixedly placing the duplex cylinder.

In some embodiments, a claw for clamping with the spray head is arranged at the top end of the support frame, an elastic piece is arranged adjacent to the claw, and the elastic piece is located in a groove arranged on the side wall of the support frame. The utility model is preferably clamped, and other interference fit or screw connection modes are all within the protection scope of the utility model.

In some embodiments, the bottom end of the support frame is provided with a base for connecting with the syringe.

In some embodiments, a gas storage cavity is formed in the base, and a gas inlet and a gas outlet valve are arranged on the gas storage cavity. The utility model preferably inputs inert gas or air into the gas storage cavity, controls the air pressure in the gas storage cavity by the air outlet valve, further applies external force to the push-pull rod, and simultaneously, can realize the movement of the push-pull rod by directly applying external force to the push-pull rod.

For a better explanation of the present utility model, exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

Examples

Disclosed is a duplex mixing injection device, as shown in fig. 1 and 2, the device comprises duplex cylinders 100 for respectively accommodating first components to form first mixed liquid and second components to form second mixed liquid, push-pull rods 200 slidably connected with the duplex cylinders 100, a support frame 300 for fixedly arranging the duplex cylinders 100, and a spray head 500 connected with the support frame 300; the spray head 500 may be directly connected to the needle end 100-1 of the duplex cylinder 100, or may be kept connected by a connector 400, where the connector 400 may be any one of a two-way valve, a three-way valve, and a four-way valve. In this embodiment, the nozzle 500 is preferably directly connected to the needle end 100-1 of the duplex cylinder 100, for example, in any one of the detachable connection modes such as screw connection or clip connection.

The duplex cylinder 100 includes two cylinders, and the two cylinders are fixedly connected in a detachable connection manner, or are not connected and are respectively and independently arranged, and the independent arrangement manner is preferred in this embodiment.

Meanwhile, as can be seen from fig. 2, the supporting frame 300 is detachably connected to the spray head 500, such as a clamping connection, a screwing connection, an interference fit, etc., in this embodiment, the clamping connection is preferred, specifically, a claw 300-1 for clamping with the spray head 500 is provided at the top end of the supporting frame 300, an elastic member 300-2 is provided adjacent to the claw 300-1, and the elastic member 300-2 is located in a groove 300-3 disposed on the side wall of the supporting frame 300. In this embodiment, two claws 300-1, preferably bending claws, are preferably disposed symmetrically at two sides of the top end of the supporting frame 300. The specific structure of the spray head 500, which is adapted to be connected to the bending type jaws, is described below.

In addition, as shown in fig. 3, the bottom end of the supporting frame 300 is provided with a base 200-1 for connecting with the push-pull rod 200, and in this embodiment, the base 200-1 is preferably provided with a fixing groove 200-5 that is clamped with the handle of the push-pull rod 200. The reciprocating movement of the push-pull rod 200 can be realized by applying an external force to the base 200-1, the embodiment can also select to open a gas storage cavity 200-4 in the base 200-1, the gas storage cavity 200-4 is provided with a first gas inlet 200-2 and a gas outlet valve 200-3, and the reciprocating movement of the push-pull rod 200 can also be realized by inputting a gas, such as inert gas or air, to the first gas inlet 200-2 and controlling the gas pressure in the gas storage cavity 200-4 to apply an external force to the base 200-1 by means of the gas outlet valve 200-3.

The spray head 500 is described in detail below: specifically, fig. 4, 5, 6, 7 and 8 are combined;

firstly, in order to realize the clamping connection between the spray head 500 and the bending type clamping jaw, in this embodiment, preferably, the two sides of the spray head 500 are provided with the protruding portion 500-9, when the elastic member 300-2 is pressed, the elastic member 300-2 is engaged with the groove 300-3 and applies an external force to the top end of the supporting frame 300, the two bending type clamping jaws move towards the direction deviating from each other, the protruding portion 500-9 of the spray head 500 extends into the space between the two bending type clamping jaws, and the clamping connection between the bending type clamping jaw and the protruding portion 500-9 can be completed by releasing the pressing force to the elastic member 300-2.

Secondly, the spray head 500 comprises a hollow cavity 500-4, wherein the hollow cavity 500-4 refers to a shell of the spray head 500 from top to bottom, and is not limited by a labeled position in the drawing, one end of the hollow cavity 500-4 is provided with a first liquid inlet 500-2 and a second liquid inlet 500-3, and the other end is provided with a spray outlet 500-5; meanwhile, a nozzle core 500-6, a gas-liquid mixing chamber 500-7 and a sheath 500-8 are arranged in the hollow cavity 500-4, and two ends of the gas-liquid mixing chamber 500-7 are respectively connected with the sheath 500-8 and the nozzle core 500-6. The nozzle core 500-6 is detachably arranged in the hollow cavity 500-4, and in the utility model, the nozzle core 500-6 is preferably a flat solid core, a liquid storage tank 500-61 is arranged at the top end of the flat solid core, and the liquid storage tank 500-61 is positioned below the spray outlet 500-5, preferably right below. And the transverse sectional area of the top end of the liquid storage tank 500-61 is larger than that of the spray outlet 500-5, and more preferably, the spray outlet 500-5 is a circular hole, and the aperture of the circular hole is 0.01 mm-1 mm, and preferably, 0.02-0.06 mm. The circular hole with the aperture is beneficial to generating gas-liquid mixed spray with certain pressure at a spray outlet. The liquid storage tank 500-61 is preferably an arc-shaped groove, two concave surfaces 500-62 are arranged on the outer side walls of two sides of the arc-shaped groove, the two concave surfaces 500-62 and the inner side wall of the hollow cavity form a gas-liquid channel 500-63, wherein each concave surface 500-62 is connected with the liquid storage tank 500-61, so that gas-liquid mixture can conveniently flow into the liquid storage tank 500-61 along the concave surface 500-62, and the concave surface 500-62 can be an arc-shaped concave surface or any other concave surface.

The nozzle core 500-6 is made of acid and alkali corrosion resistant, wear resistant and impact resistant materials.

The gas-liquid mixing chamber 500-7 is internally provided with a spiral channel 500-71, a gas-liquid outlet of the spiral channel 500-71 is connected with the gas-liquid channel 500-63, a gas-liquid inlet of the spiral channel 500-71 is connected with a sheath tube 500-8, and the spiral channel 500-71 realizes rotational flow acceleration on one hand and is beneficial to uniformly mixing a first mixed liquid formed by a first component, a second mixed liquid formed by a second component and gas on the other hand.

The sheath 500-8 comprises an infusion sheath 500-81, a gas delivery sheath 500-82 and a shaping channel 500-83 which are arranged in parallel, wherein a metal wire for shaping is arranged in the shaping channel 500-73, and the infusion sheath 500-81 comprises a sheath for conveying a first mixed liquid formed by a first component and a second mixed liquid formed by a second component respectively. And preferably, the infusion sheath 500-81 and the gas delivery sheath 500-82 are centrosymmetric with respect to the central axis of the shaping channel 500-83, and the transverse cross sections of the infusion sheath 500-81 and the gas delivery sheath 500-82 can be circular surfaces, circular ring surfaces or fan ring surfaces.

In order to better realize gas-liquid mixing, the utility model can also arrange a second air inlet 500-1 on the hollow cavity 500-4, wherein the second air inlet 500-1 is arranged near any position of the first liquid inlet 500-2 and the second liquid inlet 500-3, is not influenced by the marks in the drawings, forms different channels inside, and leads the gas introduced from the second air inlet 500-1 to flow to the gas conveying sheath pipe 500-82, and the gas and the liquid with certain pressure are fully and uniformly mixed in the gas-liquid mixing chamber so as to be favorable for forming a mist gas-liquid mixture with uniform particle size distribution at the spray outlet.

As shown in fig. 9, in addition, the first air inlet 200-2 and the second air inlet 500-1 are respectively connected to an external air source through an air pipeline 600, wherein the external air source comprises CO in any one of a balloon, an air pump and a pneumoperitoneum machine ₂ 、N ₂ Or air, etc. The gas pipeline 600 may be provided with a flowmeter, a valve, etc. for controlling the air flow and the air pressure, and the gas pipeline 600 may be made of a pipe material with a memory function or a pipe material with a qualitative function. That is, the material of the gas line 600 satisfies the above requirements, and the present utility model is not described in detail with respect to the length of the gas line.

The connection relation of the above components in this embodiment includes that the first liquid inlet and the second liquid inlet on the hollow cavity are respectively communicated with the first infusion sheath head end and the second infusion sheath head end, the second air inlet is connected with the air delivery sheath head end, the first infusion sheath tail end, the second infusion sheath tail end and the air delivery sheath tail end are simultaneously connected with the gas-liquid inlet of the spiral channel, the gas-liquid outlet of the spiral channel is connected with the gas-liquid channel, and the connection modes are detachable sealing connection.

When the duplex mixing injection device designed in this embodiment is used, the first component and the second component can be dissolved with the solvent in advance to form a first mixed solution and a second mixed solution, and then the needle end 100-1 of the duplex cylinder 100 is used to absorb the first mixed solution and the second mixed solution, or the first component and the second component can be placed in two cylinders of the duplex cylinder 100 respectively, and the needle end 100-1 of the duplex cylinder 100 is used to absorb the solvent to form the first mixed solution and the second mixed solution.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. The dual mixing injector nozzle is characterized by comprising a hollow cavity, wherein one end of the hollow cavity is provided with a liquid inlet, the other end of the hollow cavity is provided with a spray outlet, a nozzle core, a gas-liquid mixing chamber and a sheath tube are arranged in the hollow cavity, and two ends of the gas-liquid mixing chamber are respectively connected with the sheath tube and the nozzle core;

the top of nozzle core is equipped with the reservoir, the reservoir is located the spraying export below, the lateral wall of nozzle core is equipped with the concave surface, the concave surface with the inside wall of hollow cavity forms the gas-liquid channel.

2. The spray head of claim 1, wherein the nozzle core is a flat solid core having two symmetrically distributed concave surfaces, each of the concave surfaces being connected to the reservoir.

3. The spray head of claim 1 wherein the lateral cross-sectional area of the reservoir tip is greater than the lateral cross-sectional area of the spray outlet.

4. A spray head according to any one of claims 1 to 3, wherein the spray outlet is a circular orifice having a bore diameter of 0.01mm to 1mm.

5. The spray head of claim 4, wherein the circular holes have a diameter of 0.02mm to 0.06mm.

6. The spray head according to claim 1, wherein the hollow cavity is further provided with an air inlet, and the air inlet is arranged close to the liquid inlet and forms different channels respectively.

7. The spray head according to claim 1, wherein a spiral channel is arranged in the gas-liquid mixing chamber, a gas-liquid outlet of the spiral channel is connected with the gas-liquid channel, and a gas-liquid inlet of the spiral channel is connected with the sheath tube.

8. The spray head of claim 7, wherein the sheath comprises a transfusion sheath, a gas transmission sheath, and a shaping channel, wherein the shaping channel is internally provided with a metal wire for shaping.

9. The spray head according to claim 8, wherein the infusion sheath tube and the gas delivery sheath tube are centrosymmetric with respect to a central axis of the shaping passage, and a transverse cross section of the infusion sheath tube and the gas delivery sheath tube is any one of a circular surface, a circular ring surface or a fan ring surface.

10. A duplex mixing injection device, comprising a spray head according to any one of claims 1 to 9, a duplex barrel connected to the spray head, and a support for fixedly mounting the duplex barrel.

11. The device of claim 10, wherein the top end of the support frame is provided with a claw for clamping with the spray head, an elastic piece is arranged adjacent to the claw, and the elastic piece is positioned in a groove arranged on the side wall of the support frame.

12. The device of claim 10, wherein the bottom end of the support frame is provided with a base for connection with the duplex cylinder.

13. The device of claim 12, wherein a gas storage chamber is formed in the base, and a gas inlet and a gas outlet valve are arranged on the gas storage chamber.