Powder return prevention suction nozzle and powder dosing device with air filtering function

Abstract

The utility model discloses an anti-powder-return suction nozzle and a powder dosing device with an air filtering function, on one hand, the anti-powder-return suction nozzle further comprises a suction nozzle body, a medicine inlet cavity used for inputting hemostatic powder, a medicine outlet cavity used for inputting the hemostatic powder into the conveying catheter, a medicine storage cavity used for temporarily storing the hemostatic powder and an air inlet cavity used for introducing air flow are formed in the suction nozzle, the medicine inlet cavity, the medicine outlet cavity and the air inlet cavity are all communicated with the medicine storage cavity, and an air outlet one-way valve is arranged in the air inlet cavity. On the second aspect, the powder dosing device with the air filtering function comprises the powder return prevention suction nozzle, the air inlet cavity is communicated with an air conveying device, a filter is arranged on an air inlet port of the air conveying device, and an air inlet one-way valve is arranged between the filter and the air conveying device. According to the utility model, the backflow waste of hemostatic powder can be avoided, and meanwhile, the safety of inhaled gas can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of drug delivery devices, in particular to an anti-powder return suction nozzle and a powder delivery device with an air filtering function. Background Art

[0002] In the medical field, powder delivery devices are often used to deliver hemostatic powder into a cavity to stop bleeding from a wound.

[0003] At present, similar powder dosing devices are usually composed of a three-way connection, an inflatable ball, a delivery catheter, etc. The outlet of the inflatable ball is not equipped with a gas check valve, so that the hemostatic powder is easily sucked into the inflatable ball when the inflatable ball is inhaled during operation, resulting in waste of hemostatic powder. At the same time, there is no air filter installed before the air inlet of the inflatable ball, so that the air inhaled into the inflatable ball is contaminated with particles, which poses a safety hazard. Utility Model Content

[0004] The utility model aims to provide a powder backflow prevention suction nozzle and a powder dosing device with an air filtering function, which can avoid the backflow waste of hemostatic powder and ensure the safety of the inhaled gas.

[0005] In order to solve the above technical problems, the utility model adopts the following solutions:

[0006] In the first aspect, a powder backflow prevention nozzle includes a nozzle, wherein the nozzle is provided with a medicine inlet cavity for inputting hemostatic powder, a medicine outlet cavity for inputting hemostatic powder into a conveying conduit, a medicine storage cavity for temporarily storing hemostatic powder, and an air inlet cavity for introducing airflow, wherein the medicine inlet cavity, the medicine outlet cavity, and the air inlet cavity are all connected to the medicine storage cavity, and an air outlet one-way valve is provided in the air inlet cavity. The function of the air outlet one-way valve is to ensure that during the process of conveying hemostatic powder, the airflow can only enter the medicine storage cavity in one direction, thereby avoiding waste caused by the backflow of hemostatic powder.

[0007] Furthermore, the medicine inlet cavity is in the shape of a conical hole, and the cross-sectional area of ​​the medicine inlet cavity gradually increases in the direction away from the medicine storage cavity. Specifically, the medicine inlet cavity is in the shape of a conical hole. Its function is that since a medicine bottle (generally a polyethylene bottle) containing hemostatic powder is usually equipped with a medicine outlet tube to discharge the hemostatic powder, and the outer wall of the medicine outlet tube is in the shape of a cone, by setting the medicine inlet cavity to be a conical hole with the same taper as the outer wall of the medicine outlet tube, it is prevented that the hemostatic powder overflows from the medicine inlet cavity during operation.

[0008] Furthermore, an annular boss is provided on the end surface of the medicine inlet cavity away from the medicine storage cavity, and the outer diameter of the annular boss is larger than the outer diameter of the section where the medicine inlet cavity is located. Its function is that, through the setting of the annular boss, during the process of squeezing the medicine bottle filled with hemostatic powder, the operator's index finger and middle finger can hook the annular boss, successfully completing the squeezing action of the medicine bottle, and squeezing the hemostatic powder into the medicine storage cavity.

[0009] Furthermore, a gourd-shaped hole is provided in the end surface of the medicine outlet cavity away from the medicine storage cavity. The gourd-shaped hole is provided to facilitate the connection between the delivery conduit and the medicine outlet cavity to be more tightly connected when the delivery conduit is installed in the medicine outlet cavity.

[0010] Furthermore, the air inlet cavity is in the shape of a countersunk step hole. The inner diameter of the end of the air inlet cavity away from the medicine storage cavity is larger than the inner diameter of the end of the air inlet cavity connected to the medicine storage cavity. Its function is to facilitate the installation of the air outlet one-way valve through the design of the shape of the air inlet cavity, and to cover the entire air outlet one-way valve to protect the air outlet one-way valve.

[0011] Furthermore, the inner diameter of the medicine outlet cavity is smaller than the minimum inner diameter of the air inlet cavity, so as to increase the flow velocity of the airflow in the medicine outlet cavity by designing the inner diameters of the medicine outlet cavity and the air inlet cavity.

[0012] Furthermore, the medicine storage cavity is cylindrical, the medicine storage cavity is coaxially arranged with the medicine inlet cavity, and the inner diameter of the medicine storage cavity is the same as the inner diameter of the medicine inlet cavity and the medicine storage cavity. The medicine outlet cavity and the air inlet cavity are respectively connected to the side walls on opposite sides of the medicine storage cavity.

[0013] In the second aspect, a powder delivery device with air filtering function includes the above-mentioned anti-powder backflow nozzle, the air inlet cavity is connected to the air delivery device, a filter is provided on the air inlet port of the air delivery device, and an air inlet check valve is provided between the filter and the air delivery device. Its function is that, through the setting of the filter, the air inhaled into the air delivery device can be filtered to avoid pollution caused by the inhaled air and form a safety hazard; through the setting of the air inlet check valve, it can ensure that the airflow direction of the air delivery device during operation is sucked in from the outside and pushed into the air inlet cavity.

[0014] Furthermore, the medicine discharging cavity is connected with a delivery conduit, which can accurately deliver the hemostatic powder to the wound through the provision of the delivery conduit.

[0015] Furthermore, the gas delivery device adopts an inflatable ball or an air pump. The air pump can adopt a micro air pump with a dry cell. The gas delivery device, the air inlet check valve, and the air outlet check valve all adopt existing technologies.

[0016] The utility model has the beneficial effects:

[0017] 1. By installing an air outlet one-way valve in the air inlet cavity of the suction nozzle, the air flow can only flow toward the medicine storage cavity, avoiding the hemostatic powder from flowing back into the air delivery device and causing waste;

[0018] 2. By setting a filter on the air inlet port of the air transmission device, the inhaled air can be filtered to ensure safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the nozzle in Example 1;

[0020] Figure 2 This is a schematic diagram of the structure of the powder dosing device with air filtering function in Example 1;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the powder delivery device with air filtering function equipped with a medicine bottle in Example 1.

[0022] Figure numerals: 1. suction nozzle; 2. medicine inlet chamber; 3. medicine outlet chamber; 4. medicine storage chamber; 5. air inlet chamber; 6. air outlet one-way valve; 7. annular boss; 8. gourd-shaped hole; 9. air delivery device; 10. filter; 11. air inlet one-way valve; 12. delivery conduit. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0024] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0025] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Example 1

[0027] In a first aspect, a powder return prevention nozzle 1, such as Figure 1As shown, the nozzle 1 includes a medicine inlet chamber 2 for inputting hemostatic powder, a medicine outlet chamber 3 for inputting hemostatic powder into a conveying conduit 12, a medicine storage chamber 4 for temporarily storing hemostatic powder, and an air inlet chamber 5 for introducing air flow. The medicine inlet chamber 2, the medicine outlet chamber 3, and the air inlet chamber 5 are all connected to the medicine storage chamber 4, and an air outlet check valve 6 is provided in the air inlet chamber 5. Its function is to ensure that, during the process of conveying hemostatic powder, the air flow can only enter the medicine storage chamber 4 in one direction through the setting of the air outlet check valve 6, so as to avoid waste caused by the backflow of hemostatic powder.

[0028] Specifically, Figure 1 As shown, the medicine inlet chamber 2 is in the shape of a conical hole, and the cross-sectional area of ​​the medicine inlet chamber 2 gradually increases in the direction away from the medicine storage chamber 4. Specifically, the medicine inlet chamber 2 is in the shape of a conical hole. Its function is that since a medicine bottle (generally a polyethylene bottle) containing hemostatic powder is usually equipped with a medicine outlet tube to discharge the hemostatic powder, and the outer wall of the medicine outlet tube is in the shape of a cone, by setting the medicine inlet chamber 2 to a conical hole with the same taper as the outer wall of the medicine outlet tube, it is prevented that the hemostatic powder overflows from the medicine inlet chamber 2 during operation.

[0029] Specifically, Figure 1 As shown, an annular boss 7 is provided on the end surface of the medicine inlet cavity 2 away from the medicine storage cavity 4, and the outer diameter of the annular boss 7 is larger than the outer diameter of the section where the medicine inlet cavity 2 is located. Its function is that, through the setting of the annular boss 7, during the process of squeezing the medicine bottle filled with hemostatic powder, the operator's index finger and middle finger can hook the annular boss 7, and the squeezing action of the medicine bottle can be successfully completed, and the hemostatic powder can be squeezed into the medicine storage cavity 4.

[0030] Specifically, Figure 1 As shown, a gourd-shaped hole 8 is provided in the end surface of the medicine outlet cavity 3 away from the medicine storage cavity 4. The gourd-shaped hole 8 is provided to facilitate the installation of the delivery conduit 12 in the medicine outlet cavity 3 so that the connection between the delivery conduit 12 and the medicine outlet cavity 3 is more tightly connected.

[0031] Specifically, Figure 1 As shown, the air inlet cavity 5 is in the shape of a countersunk step hole. The inner diameter of the end of the air inlet cavity 5 away from the medicine storage cavity 4 is larger than the inner diameter of the end of the air inlet cavity 5 connected to the medicine storage cavity 4. Its function is to facilitate the installation of the air outlet check valve 6 through the design of the shape of the air inlet cavity 5, and to cover the entire air outlet check valve 6 to protect the air outlet check valve 6.

[0032] Specifically, Figure 1 As shown, the inner diameter of the medicine outlet cavity 3 is smaller than the minimum inner diameter of the air inlet cavity 5. Its function is to increase the flow rate of the airflow in the medicine outlet cavity 3 by designing the inner diameters of the medicine outlet cavity 3 and the air inlet cavity 5.

[0033] Specifically, Figure 1As shown, the medicine storage chamber 4 is cylindrical, and the medicine storage chamber 4 is coaxially arranged with the medicine inlet chamber 2, and the inner diameter of the medicine storage chamber 4 is the same as the inner diameter of the medicine inlet chamber 2 at the connection point with the medicine storage chamber 4. The medicine outlet chamber 3 and the air inlet chamber 5 are respectively connected to the side walls of the medicine storage chamber 4 on opposite sides.

[0034] In a second aspect, a powder delivery device with air filtering function, such as Figure 2 As shown, it includes the above-mentioned anti-powder return nozzle, the air inlet cavity 5 is connected to the air delivery device 9, a filter 10 is provided on the air inlet port of the air delivery device 9, and an air inlet check valve 11 is provided between the filter 10 and the air delivery device 9. Its function is that, through the setting of the filter 10, the air sucked into the air delivery device 9 can be filtered to avoid pollution caused by the inhaled air and form a safety hazard; through the setting of the air inlet check valve 11, it can ensure that the airflow direction of the air delivery device 9 in operation is sucked from the outside and pushed into the air inlet cavity 5.

[0035] Specifically, Figure 2 As shown, the medicine discharging cavity 3 is connected with a delivery conduit 12. Its function is that, through the setting of the delivery conduit 12, the hemostatic powder can be accurately delivered to the wound.

[0036] Specifically, Figure 2 As shown, the gas delivery device 9 adopts an inflatable ball.

[0037] The working principle of this embodiment is described as follows: Figure 3 As shown, first, insert the medicine outlet tube of the medicine bottle filled with hemostatic powder into the medicine inlet cavity 2, so that the medicine outlet tube and the medicine inlet cavity 2 are closely fitted, and then the medicine bottle is inverted, and then the annular boss 7 is hooked with the index finger and the middle finger, and the palm is against the bottom of the medicine bottle, and the medicine bottle is squeezed to make the hemostatic powder enter the medicine storage cavity 4;

[0038] Then, the inflatable ball is squeezed, and the inlet check valve 11 is closed. The air flows through the outlet check valve 6 and enters the medicine storage cavity 4, and the hemostatic powder in the medicine storage cavity 4 is sequentially delivered to the corresponding wound in the cavity through the medicine outlet cavity 3 and the delivery catheter 12;

[0039] After that, the squeezing of the inflatable ball is stopped, and the inflatable ball expands outwards under the action of its own resilience. At the same time, the air intake one-way valve 11 is opened, and new air is added to enter the inflatable ball for use in the next stroke.

[0040] The above is only a preferred embodiment of the utility model and does not limit the utility model in any form. According to the technical essence of the utility model, within the spirit and principles of the utility model, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the utility model.

Claims

1. A powder return prevention nozzle, characterized in that: The invention comprises a suction nozzle (1), wherein the suction nozzle (1) is provided with a medicine inlet chamber (2) for inputting hemostatic powder, a medicine outlet chamber (3) for inputting hemostatic powder into a conveying conduit (12), a medicine storage chamber (4) for temporarily storing hemostatic powder, and an air inlet chamber (5) for introducing air flow; the medicine inlet chamber (2), the medicine outlet chamber (3), and the air inlet chamber (5) are all connected to the medicine storage chamber (4), and an air outlet non-return valve (6) is provided in the air inlet chamber (5).

2. The anti-powder return nozzle according to claim 1, characterized in that: The medicine feeding cavity (2) is in the shape of a conical hole, and the cross-sectional area of ​​the medicine feeding cavity (2) gradually increases in a direction away from the medicine storage cavity (4).

3. The anti-powder return nozzle according to claim 1, characterized in that: An annular boss (7) is provided on the end surface of the medicine feeding cavity (2) away from the medicine storage cavity (4), and the outer diameter of the annular boss (7) is larger than the outer diameter of the section where the medicine feeding cavity (2) is located.

4. The anti-powder return nozzle according to claim 1, characterized in that: A gourd-shaped hole (8) is provided in the end surface of the medicine outlet cavity (3) away from the medicine storage cavity (4).

5. The anti-powder return nozzle according to claim 1, characterized in that: The air inlet cavity (5) is in the shape of a countersunk step hole.

6. The anti-powder return nozzle according to claim 5, characterized in that: The inner diameter of the medicine outlet cavity (3) is smaller than the minimum inner diameter of the air inlet cavity (5).

7. The anti-powder return nozzle according to claim 6, characterized in that: The medicine storage cavity (4) is cylindrical and is coaxially arranged with the medicine feeding cavity (2). The inner diameter of the medicine storage cavity (4) is the same as the inner diameter of the portion where the medicine feeding cavity (2) communicates with the medicine storage cavity (4).

8. A powder dosing device with air filtering function, characterized in that: It comprises an anti-powder return nozzle as described in any one of claims 1 to 7, wherein the air inlet cavity (5) is connected to an air supply device (9), a filter (10) is provided on the air inlet port of the air supply device (9), and an air inlet check valve (11) is provided between the filter (10) and the air supply device (9).

9. A powder dosing device with air filtering function according to claim 8, characterized in that: The medicine outlet cavity (3) is connected to a delivery conduit (12).

10. A powder dosing device with air filtering function according to claim 8, characterized in that: The gas delivery device (9) is an inflatable ball or an air pump.

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