Nozzle structure and liquid conveying device

Abstract

The utility model discloses a nozzle structure and a liquid conveying device, the nozzle structure comprises a flow guide member, a matching base part, a retainer, a chip and a pressing and fixing part, the flow guide member is provided with a far end with a groove; the matching substrate is arranged in the inner bottom of the groove; the retainer is arranged above the matching base part and forms a cavity of a sealing medium with the matching base part; the chip is clamped in the cavity by the holder; the pressing and fixing piece is arranged on the outer side of the retainer and provided with an outer edge extending in the radial direction. The outer edge can be matched with the far end of the flow guide component in a stopping mode, and therefore the maximum downward moving stroke of the pressing and fixing piece is limited. And a first bulge is arranged at the lower end of the outer edge, so that circumferential continuous sealing is formed at the far end of the flow guide component. In the nozzle structure, the outer edge can be in stop fit with the far end of the flow guide component, so that destructive damage to the chip caused by over-travel downward movement of the pressing and fixing piece is prevented, and the safety of the chip is effectively protected; the double-sealing design provides a reliable high-pressure environment for the chip, and the sealing performance of the nozzle structure is greatly improved.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 202421162817.4, filed on May 27, 2024, entitled “A Nozzle Structure and Liquid Delivery Device”. TECHNICAL FIELD

[0002] The utility model relates to atomization technical field, especially a nozzle structure and liquid delivery device. BACKGROUND

[0003] The soft mist device for inhalation administration generates fine droplets by nozzle structure under high pressure, and many droplets are sprayed from the device in the form of mist, so as to enter the inhalation administration. The particle size of the fine particles that can be directly absorbed by the lung is about 1-5 microns, and the liquid pressure required to change the liquid into 1-5 micron fine droplets is about 5Mpa to 40Mpa. In this high pressure environment, the sealing property of the nozzle structure is particularly important to meet this liquid pressure.

[0004] The existing nozzle structure, such as US patent No. US9027967B2, fluid component 5 is arranged in the cavity formed by elastic component 4 and cooperating component 9, and elastic component 4 is tightly fixed by holder 1 outside. The applicant notices that, due to the lack of effective limiting measures of the holder, when it moves closer to the cooperating component, the risk of damage to the fluid component under pressure also increases. In addition, there is only one seal (formed by the elastic component and the cooperating component) around the fluid component, which is difficult to ensure that the sealing property of the nozzle structure meets the long-term use requirements. SUMMARY

[0005] The utility model aims at providing a nozzle structure and liquid delivery device, which improves the pressure fixing part (also known as holder) to protect the chip from damage and improve the sealing property and reliability of the nozzle structure.

[0006] The utility model realizes the purpose by adopting the following technical scheme:

[0007] A nozzle structure comprises:

[0008] A flow guide member has a distal end with a groove;

[0009] A cooperating base is arranged in the inner bottom of the groove;

[0010] A holder is arranged above the cooperating base and forms a cavity of sealing medium with the cooperating base;

[0011] A chip is clamped in the cavity by the holder, and the chip is used to atomize the medium in the cavity;

[0012] A pressing member is arranged outside the holder, the pressing member has a radially extending outer edge;

[0013] The outer edge can be stopped by the distal end of the flow guide member, thereby limiting the maximum downward stroke of the pressing member; and a first protrusion is arranged at the lower end of the outer edge, thereby forming a circumferentially continuous seal at the distal end of the flow guide member.

[0014] In some embodiments, the pressing member is welded to the distal end of the flow guide member; or,

[0015] A fastener is arranged outside the pressing member, and the fastener is threadedly connected to the distal end of the flow guide member.

[0016] In some embodiments, the first protrusion is made of metal, and the first protrusion is integrally formed with the outer edge; or,

[0017] The first protrusion is made of rubber, and the first protrusion is partially embedded in the outer edge.

[0018] In some embodiments, a filter is arranged in the mating base member;

[0019] The filter filters particles with a size less than or equal to 0.1 mm, and the medium enters the cavity after passing through the filter.

[0020] In some embodiments, an O-ring is arranged between the mating base member and the inner bottom of the groove, and the filter is located in the O-ring.

[0021] In some embodiments, the holder includes oppositely arranged inner and outer sides;

[0022] The included angle between the inner side and the vertical plane is 50°-70°, and the included angle between the outer side and the vertical plane is 4°-8°.

[0023] In some embodiments, the holder further includes a second protrusion connecting the inner side and the outer side;

[0024] The upper end of the mating base member is provided with a convex ring facing the second protrusion, the convex ring interferes with the second protrusion and forms a circumferentially continuous seal.

[0025] In some embodiments, the lower end of the chip is suspended above the mating base member.

[0026] In some embodiments, a gasket is arranged between the chip and the pressing member, and a through hole is arranged in the middle of the gasket.

[0027] In some embodiments, the chip includes:

[0028] The first plate is provided with a first filtering structure, and the particle size range filtered by the first filtering structure is less than or equal to 0.003 mm;

[0029] The second plate is provided with a second filtering structure, and the particle size range filtered by the second filtering structure is less than or equal to 0.01 mm;

[0030] The first plate and the second plate are buckled to each other, so that the first filtering structure and the second filtering structure are assembled together.

[0031] In some embodiments, a tapered jet hole is arranged in the middle of the upper end of the pressing piece, and the axial cross-section angle of the jet hole is 70°-120°.

[0032] A liquid delivery device comprising the nozzle structure.

[0033] In some embodiments, the liquid delivery device is an atomizer for delivering a medicinal liquid.

[0034] Compared with the prior art, the beneficial effects of the utility model at least include:

[0035] 1. The outer edge can form a stop cooperation with the distal end of the flow guide member, preventing the pressing piece from moving downward beyond the range and causing destructive damage to the chip, effectively protecting the safety of the chip.

[0036] 2. The first protrusion can form a second sealing at the distal end of the flow guide member, and the double-sealing design provides a reliable high-pressure environment for the chip and greatly improves the sealing performance of the nozzle structure itself. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a schematic view of the nozzle structure of the utility model.

[0038] Figure 2 is another structural schematic view of the nozzle structure of the utility model.

[0039] Figure 3 is a partially exploded structural schematic view of the nozzle structure of the utility model.

[0040] Figure 4 is a structural schematic view of the chip in the utility model.

[0041] Figure 5 is Figure 4 an exploded structural schematic view.

[0042] Figure 6 is a structural schematic view of the liquid delivery device of the embodiment of the utility model.

[0043] In the figure: 1, flow guide member; 101, groove; 2, matching base; 201, convex ring; 3, retainer; 301, inner side; 302, outer side; 303, second protrusion; 4, chip; 401, first plate; 402, second plate; 403, first filter structure; 404, second filter structure; 5, compression member; 501, outer edge; 502, jet hole; 6, first protrusion; 7, fastener; 8, filter member; 9, O-ring; 10, gasket. DETAILED DESCRIPTION

[0044] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and fully convey the inventive aspects of the example implementations to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and descriptions of the same or similar elements can be omitted.

[0045] The words expressing position and direction described in the present application are explained by taking the drawings as an example, but changes can also be made as needed, and the changes made are included in the protection scope of the present application.

[0046] The nozzle structure of the present application is mainly used in the field of medical atomization, and can also be applied to the technical fields of cosmetics, irrigation, humidification, dust removal, etc., without limitation.

[0047] Referring to Figures 1 to 3 The utility model discloses a kind of nozzle structure, including flow guide member 1, matching base 2, retainer 3, chip 4 and compression member 5.

[0048] Flow guide member 1 is the main part of nozzle structure, its shape is roughly tubular. The length direction both ends of flow guide member 1 are proximal end and distal end respectively, proximal end is used to butt joint infusion tube, which is omitted in the present application, and distal end is provided with groove 101, for installing components such as matching base 2, chip 4 (such as Figure 1 And Figure 2 As shown). In addition, the inside of flow guide member 1 is provided with flow channel that is communicated with proximal end and distal end, to realize normal delivery of medium.

[0049] Matching base 2 is arranged in the inner bottom of groove 101, and keeps itself in horizontal stable state. The middle part of matching base 2 is provided with up-down through channel, to realize normal delivery of medium.

[0050] Retainer 3 is arranged above matching base 2 and forms sealed medium cavity with it. Exemplarily, as Figures 1 to 3As shown, the bottom of the retainer 3 is provided with a second protrusion 303, and the upper end of the base member 2 is provided with a protruding ring 201 opposite to the second protrusion 303. The protruding ring 201 can be interferingly fitted with the second protrusion 303, thereby forming a cavity for accommodating the medium and forming a continuous seal in the circumferential direction, i.e. the first seal.

[0051] The chip 4 is clamped in the cavity by the retainer 3, which functions to atomize the medium in the cavity, thereby obtaining the required fine droplets.

[0052] The pressing member 5 is in the shape of a sleeve, which is arranged outside the retainer 3, and functions to fix and press the retainer 3 against the base member 2, thereby forming an effective seal. In the present application, the pressing member 5 has a radially extending outer edge 501, which can be stopped by the distal end of the flow guide member 1 in terms of height, thereby limiting the maximum downward stroke of the pressing member 5 and preventing destructive damage to the chip 4 caused by overstroke downward movement, and effectively protecting the safety of the chip 4. In addition, the lower end of the outer edge 501 is provided with a first protrusion 6, which can form a circumferential continuous seal at the distal end of the flow guide member 1, i.e. the second seal. The double-seal design provides a reliable high-pressure environment for the chip 4, and greatly improves the sealing performance of the nozzle structure itself.

[0053] Referring to Figure 1 As shown, in some other embodiments, the outer side of the pressing member 5 is provided with a fastener 7, which is threadedly connected and fixed with the distal end of the flow guide member 1. Exemplarily, the fastener 7 can be a stop nut with internal threads, and the distal end of the flow guide member 1 is provided with external threads, which can be detachably connected in a threaded manner. This nozzle structure can adjust the tightness of the first seal, and is also beneficial for later maintenance operations.

[0054] Referring to Figure 2 As shown, in some embodiments, the pressing member 5 is welded and fixed with the distal end of the flow guide member 1. This nozzle structure design is simple, and can effectively reduce the assembly cost of components. Preferably, the pressing member 5 and the distal end of the flow guide member 1 can be fixed in a full-welding manner, thereby further enhancing the sealing performance at the second seal.

[0055] In some embodiments, the first protrusion 6 is made of metal, and the first protrusion 6 is integrally formed with the outer edge 501. This seal is a metal hard seal, which is convenient to manufacture and has a relatively low cost.

[0056] Alternatively, the first protrusion 6 is made of rubber, and the first protrusion 6 is partially embedded in the outer edge 501 (not shown). This seal is a rubber seal, which has the advantage that the second seal can be replaced and remedied when it fails.

[0057] Referring to Figures 1 to 3As shown, in some embodiments, the fitting base 2 is provided with a filter 8, which is arranged in the channel in the middle of the fitting base 2, and the particle size range of the filtered particles is less than or equal to 0.1 mm, which is used to filter larger particle impurities. After the medium passes through the filter 8, it enters the cavity, which plays a pre-filtering role and avoids clogging the chip 4 to affect the atomization function.

[0058] Further, the fitting base 2 and the inner bottom of the groove 101 are provided with an O-ring 9, and the filter 8 is located in the O-ring 9. Specifically, the bottom edge of the fitting base 2 is provided with a concave corner, which can form an O-ring 9 ring groove after being matched with the groove 101. The O-ring 9 is used to enhance the circumferential sealing of the filter 8 and improve the pre-filtering effect of the medium.

[0059] Referring to Figure 3 As shown, in some embodiments, the retainer 3 can be made of elastic materials such as rubber materials.

[0060] The retainer 3 includes oppositely arranged inner side surface 301 and outer side surface 302, and the inner side surface 301 and the outer side surface 302 are connected by the second protrusion 303. In this application, the included angle between the inner side surface 301 and the vertical surface is 50°-70°, preferably 55-60°. Within this range, the medium entering the cavity can extrude the inner side surface 301, so that the retainer 3 can better fix the chip 4. The included angle between the outer side surface 302 and the vertical surface is 4°-8°, preferably 5°-6°. Within this range, it is more beneficial to the insertion assembly of the retainer 3 based on the interference formed between the inner side of the pressing member 5.

[0061] As shown in Figure 1 and Figure 2 In some embodiments, the lower end of the chip 4 is suspended above the fitting base 2, so as to avoid damage caused by extrusion and collision during assembly, and ensure that the atomization function is not affected. For example, the distance between the lower end of the chip 4 and the fitting base 2 is controlled to be between 1-3 mm, for example, it can be 1 mm, 1.6 mm, 2 mm, 2.4 mm, etc.

[0062] In some embodiments, a gasket 10 is arranged between the chip 4 and the pressing member 5, which can protect the end of the chip 4 and avoid damage to the outlet of the chip 4 caused by the pressing member 5. The middle part of the gasket 10 is provided with a through hole, so as to ensure smooth release of the particles after being atomized by the chip 4.

[0063] Referring to Figure 4 and Figure 5As shown, in some embodiments, the chip 4 comprises a first plate 401 and a second plate 402. Among them, the first plate 401 is provided with a first filter structure 403, the particle size range filtered by the first filter structure 403 is less than or equal to 0.003mm, and the second plate 402 is provided with a second filter structure 404, the particle size range filtered by the second filter structure 404 is less than or equal to 0.01mm.

[0064] The first filter structure 403 and the second filter structure 404 are designed on two plates in the application, and only the first plate 401 and the second plate 402 need to be buckled with each other, so that the first filter structure 403 and the second filter structure 404 are assembled together, thereby reducing the patterning difficulty and manufacturing precision requirement of the filter structure inside the chip 4.

[0065] Referring to Figures 1 to 3 As shown, in some embodiments, the upper end of the compression solid 5 is provided with a conical spray hole 502, and the axial cross-section angle of the spray hole 502 is 70°-120°. By selecting different angles, different mist types and doses can be obtained. In simple terms, the smaller the axial cross-section angle of the spray hole 502, the narrower the mist type formed, and the fine droplets released will collide and gather with the hole wall, resulting in less inhalable dose. Preferably, the axial cross-section angle of the spray hole 502 is 90°-110°.

[0066] Referring to Figure 6 As shown, the utility model further discloses a liquid delivery device comprising the above-mentioned nozzle structure. In some embodiments, the liquid delivery device is a nebulizer for delivering medicinal liquid.

[0067] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the person skilled in the art can change, modify, replace and modify the above-mentioned embodiments within the scope of the utility model without departing from the principles and purposes of the utility model, all these changes should belong to the protection scope of the utility model claim.

Claims

1. A nozzle structure, characterized by, The utility model relates to a kind of chip sealing structure, including: Flow guide member (1), its distal end is provided with recess (101); Match base piece (2) is arranged in the recess (101), and the upper end of the match base piece (2) is provided with convex ring (201); Holder (3) is arranged above the match base piece (2), and the lower end of the holder (3) is provided with second protrusion (303); Pressing solid (5) is arranged outside the holder (3), and the pressing solid (5) has radially extending outer edge (501), and the lower end of the outer edge (501) is provided with first protrusion (6); Wherein, the convex ring (201) and the second protrusion (303) cooperate to form the first circumferentially continuous sealing, and the first protrusion (6) cooperates with the distal end of the flow guide member (1) to form the second circumferentially continuous sealing.

2. The nozzle structure of claim 1, wherein The pressing solid (5) and the distal end of the flow guide member (1) are full-welded fixed.

3. The nozzle structure of claim 1, wherein The outer side of the pressing solid (5) is provided with fastener (7), and the fastener (7) is threadedly fixed with the distal end of the flow guide member (1).

4. The nozzle structure of claim 1, wherein The first protrusion (6) is integrally formed with the outer edge (501);Wherein, the first protrusion (6) is metal material.

5. The nozzle structure of claim 1, wherein The first protrusion (6) is partially embedded in the outer edge (501);Wherein, the first protrusion (6) is rubber material.

6. The nozzle structure of claim 1, wherein Chip (4) is clamped in the holder (3), and the distance between the chip (4) and the match base piece (2) is 1 mm-3mm.

7. The nozzle structure of claim 6, wherein A gasket (10) is arranged between the chip (4) and the pressing solid (5), and a through hole is arranged in the middle of the gasket (10).

8. The nozzle structure of claim 1, wherein Filtering element (8) is arranged in the match base piece (2), and the particle size range filtered by the filtering element (8) is less than or equal to 0.1mm.

9. The nozzle structure of claim 8, wherein O-ring (9) is arranged between the match base piece (2) and the inner bottom of the recess (101), and the filtering element (8) is located on the inner side of the O-ring (9).

10. The nozzle structure of claim 1, wherein The upper end of the pressing solid (5) is provided with conical jet hole (502) in the middle, and the axial cross section of the jet hole (502) is 90°-110°.

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