Pump with adjustable spraying weight and spraying device

Abstract

The utility model discloses a spray weight adjustable pump and a spray device. The spray weight adjustable pump comprises a pump body, a pump cover and a piston unit, wherein a first contact part with adjustable height is arranged in the pump body; the pump cover is fixedly arranged at the top of the pump body, and the pump cover is provided with a second contact part extending towards the inner bottom of the pump body; the piston unit is arranged in the pump body in a sliding mode, the piston unit is partially located between the first contact part and the second contact part, and the compression stroke of the piston unit is jointly limited by the first contact part and the second contact part. According to the pump with the adjustable spray weight and the spraying device, the groove is formed in the pump, and the height of the first contact part is adjusted in a liquid injection mode, so that the compression stroke of the piston unit is changed, the purpose of adjusting the spray weight is achieved, and the use requirements of different environments are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to spray technical field especially relates to a pump and injection device of adjustable spray weight. BACKGROUND

[0002] Nasal spray delivery device as a kind of common medical equipment, its principle fills drug or with suitable auxiliary material in special device, drug is released in mist state by pressure pump, it is used for lung inhalation or directly sprayed to cavity mucosa and skin etc. The treatment of disease bad site.

[0003] In prior art pump structure, the spray weight of pump is mainly determined by the compression stroke of piston, and the compression stroke is usually the distance from the pump cover (top dead center) to the inner step of pump body (bottom dead center). Since the size of pump body and pump cover is fixed, the compression stroke is usually unchangeable, so the spray weight of pump cannot be adjusted.

[0004] By adjusting the spray weight of pump, the flow of liquid can be changed, the pressure of spray system can be maintained stable to prevent spray abnormality or failure caused by too high / low pressure, the mixing effect with target object can be enhanced, and the uniformity of mixing can be improved, etc. However, the spray weight of existing pump cannot be adjusted, so it is difficult to meet the use requirements in different environments.

[0005] Therefore, the present application provides a pump with adjustable spray weight to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a pump with adjustable spray weight and injection device, a ring-shaped groove is formed at the bottom dead center position of pump body, and the height of first contact part is adjusted by injecting liquid into the groove, so as to change the compression stroke of piston unit, thereby achieving the purpose of adjusting the spray weight of pump and meeting the use requirements in different environments.

[0007] The utility model achieves the purpose by adopting the following technical solutions:

[0008] A pump with adjustable spray weight comprises:

[0009] A pump body, wherein a first contact part with adjustable height is arranged in the pump body;

[0010] A pump cover is fixedly arranged at the top of the pump body, and the pump cover has a second contact part extending towards the bottom of the pump body;

[0011] A piston unit is slidably arranged in the pump body, and the piston unit is partially arranged between the first contact part and the second contact part;

[0012] In the pump liquid state, the piston unit abuts against the first contact part and limits the bottom dead center thereof, and in the liquid suction state, the piston unit abuts against the second contact part and limits the top dead center thereof.

[0013] In some embodiments, the inner side of the pump body is provided with a protrusion, which forms a ring-shaped groove with the inner wall of the pump body.

[0014] The groove is filled with a liquid with adjustable volume, and the first contact part is slidingly and sealingly arranged in the groove.

[0015] In some embodiments, the pump body is provided with a liquid injection hole, one end of which is in communication with the groove, and the other end is provided with a detachable plug.

[0016] In some embodiments, the groove wall is provided with a scale line.

[0017] In some embodiments, the adjustable height of the first contact part is 0-20mm.

[0018] In some embodiments, the pump with adjustable spraying weight further comprises:

[0019] A ball is movably arranged at the inner bottom of the pump body, and the ball is used to selectively block the liquid inlet of the pump body.

[0020] A spring is arranged in the pump body, and the spring is used to support the piston unit.

[0021] In some embodiments, the piston unit comprises:

[0022] A piston body having a skirt in sliding and sealing cooperation with the pump body, and the inner side of the skirt is provided with a sealing part.

[0023] A plunger rod slidingly penetrating the piston body, and the outer periphery of the plunger rod is provided with a cooperating part accommodated in the skirt.

[0024] In the liquid suction state, the sealing part is in contact and interference cooperation with the cooperating part, and in the liquid pumping state, the sealing part is separated from the cooperating part and forms a side flow channel.

[0025] In some embodiments, the plunger rod is provided with a plurality of axial flow guide grooves at intervals.

[0026] In some embodiments, the pump body is provided with an air hole above the skirt, which is used to balance the air pressure difference inside and outside the container.

[0027] A spraying device comprising the pump with adjustable spraying weight.

[0028] Compared with the prior art, the beneficial effects of the utility model at least include: through forming a groove in the pump and adjusting the height of the first contact part in a liquid injection mode, the compression stroke of the piston unit is changed, the purpose of spray weight adjustment is realized, and different environmental use requirements are met. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the three-dimensional schematic diagram of the spray weight adjustable pump of the utility model.

[0030] Figure 2 It is the structural schematic diagram of the spray weight adjustable pump in the liquid suction state.

[0031] Figure 3 It is the structural schematic diagram of the spray weight adjustable pump in the liquid pumping state.

[0032] Figure 4 It is the structural schematic diagram of the piston unit.

[0033] Figure 5 It is the structural schematic diagram of the spray device.

[0034] In the drawing: 1, pump body;11, first contact part;12, protruding part;13, groove;14, liquid injection hole;15, liquid inlet;16, air hole;2, pump cover;21, second contact part;3, piston unit;31, piston body;311, skirt;312, sealing part;32, plunger rod;321, matching part;322, axial flow guide groove;4, plug;5, ball;6, spring;7, side flow channel. DETAILED DESCRIPTION

[0035] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations, however, can 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 thus description of the same will be simplified or omitted.

[0036] The words expressing position and direction described in the utility model are all explained by taking the drawings as examples, but changes can also be made according to needs, and the changes made are all included in the protection scope of the utility model.

[0037] Referring to Figures 1 to 3 As shown in the drawing, the utility model discloses a spray weight adjustable pump, including pump body 1, pump cover 2 and piston unit 3.

[0038] The pump body 1 is tubular and has a first contact part 11 inside. The first contact part 11 is located below the piston unit 3 and serves as the lower dead center of the pump to limit the downward stroke of the piston unit 3.

[0039] In this application, the height of the first contact portion 11 is adjustable, thereby changing the bottom dead center of the pump. (See attached...) Figure 2 and 3 As shown, the pump body 1 includes an upper pipe section with a relatively large diameter and a lower pipe section with a relatively small diameter. The two sections form a stepped structure at the connection. A protrusion 12 is provided on the inner side of the pump body 1. The protrusion 12 and the inner wall of the pump body 1 (i.e., the stepped structure) form an annular groove 13. The first contact part 11 is slidably and sealingly disposed in the groove 13. The groove 13 is filled with liquid. By adjusting the amount of liquid in the groove, the first contact part 11 can be moved up and down, thereby changing the lower dead point of the pump.

[0040] The pump cover 2 is fixedly installed on the top of the pump body 1, and has a second contact portion 21 extending toward the inner bottom of the pump body 1. The second contact portion 21 is located above the piston unit 3, and serves as the top dead center of the pump to limit the upward stroke of the piston unit 3.

[0041] In this application, since the height of the pump's bottom dead center is adjustable, the position of the second contact portion 21 can be fixed. Of course, in other embodiments, the height of the second contact portion 21 is also adjustable (not shown).

[0042] The piston unit 3 is slidably disposed inside the pump body 1, and its sealing part 312 is located between the first contact part 11 and the second contact part 21. The two parts together limit its compression stroke. By adjusting the compression stroke of the piston unit 3, the pump's spray weight can be adjusted.

[0043] The pump with adjustable spray weight of this application achieves the purpose of spray weight adjustment by forming a groove 13 inside the pump and adjusting the height of the first contact part 11 by liquid injection, thereby changing the compression stroke of the piston unit 3 and meeting the needs of different environments.

[0044] In addition, since liquids are difficult to compress, the groove 13 is filled with liquid and thereby supports the first contact part 11. The position of the first contact part 11 is more stable and it will not fluctuate significantly when it comes into contact with the piston unit 3, resulting in better uniformity of pump spray.

[0045] Continue as attached Figure 2 and 3As shown, in some embodiments, the pump body 1 is provided with a liquid injection hole 14, one end of which is communicated with the groove 13, and the liquid injection hole 14 can be used to realize the functions of liquid extraction and injection, so as to control the liquid amount in the groove 13. The other end of the liquid injection hole 14 is provided with a detachable plug 4, which can be threadedly connected to plug the liquid injection hole 14, so as to prevent the liquid in the groove 13 from leaking and external gas from entering, and ensure the stability of the position of the first contact part 11.

[0046] Preferably, the groove 13 is provided with a scale line on the groove wall, and the scale line can be printed on at least one side of the groove wall of the groove 13. During the liquid extraction and injection process, the height of the first contact part 11 after adjustment can be quickly understood by observing the corresponding scale line on the upper end surface of the first contact part 11.

[0047] In some embodiments, the adjustable height of the first contact part 11 is 0-20mm, so as to provide sufficient compression stroke variation for the piston unit 3 and meet the needs of different spray weight adjustment. In an exemplary pump, the initial spray weight is about 12.5mg, and by adjusting the height of the first contact part 11, the spray weight can be varied in the range of about 10.5mg-12.5mg, so as to meet the use in different environments.

[0048] Referring to Figure 4 As shown, in some embodiments, the piston unit 3 includes a piston body 31 and a plunger rod 32. The piston body 31 has a skirt 311 which is in sliding and sealing cooperation with the pump body 1, and the inner side of the skirt 311 is provided with a sealing part 312; the plunger rod 32 is slidably penetrated through the piston body 31, and the outer periphery thereof is provided with a cooperation part 321 which is accommodated in the skirt 311.

[0049] In the present application, the sealing part 312 can be made of rubber material with good sealing performance and is annularly distributed at the inner top position of the skirt 311, so as to keep the circumferential sealing. The cooperation part 321 can be made of hard material, and the outer diameter thereof is slightly larger than the minimum inner diameter of the sealing part 312. In the liquid suction state, the sealing part 312 is in contact and interference cooperation with the cooperation part 321, so as to improve the sealing performance between the piston body 31 and the plunger rod 32 and ensure the airtightness of the space in the pump. In the liquid pumping state, the sealing part 312 is separated from the cooperation part 321 and forms a side flow channel 7, so as to pump the liquid outwards.

[0050] Further, the plunger rod 32 is provided with a plurality of axial flow guide grooves 322 which are spaced apart, and are used to guide the liquid pumped outwards from the side flow channel 7. The external axial flow guide grooves 322 are convenient to process, and the multi-groove surrounding layout can meet the needs of large liquid pumping amount.

[0051] Referring to Figure 2 and Figure 3 As shown, the spray weight adjustable pump further includes a ball 5 and a spring 6.

[0052] Wherein, the ball 5 is movably arranged at the inner bottom of the lower tube portion of the pump body 1, for selectively blocking the liquid inlet 15 of the pump body 1. Specifically, in the liquid suction state, the ball 5 is in clearance fit with the lower tube portion, and the liquid can enter the pump body 1 from the liquid inlet 15 of the pump body 1, while in the liquid pumping state, the ball 5 is in interference seal with the lower tube portion, to achieve the blocking function and prevent the liquid in the pump body 1 from flowing back.

[0053] The spring 6 is arranged in the pump body 1, and is between the ball 5 and the piston unit 3, to support the piston unit 3 and provide elastic force for the reset of the piston unit 3. In the present application, the lower end of the spring 6 can abut against the inner wall of the pump body 1, and the upper end can abut against the fitting part 321 of the piston unit 3.

[0054] The working principle of the pump is as follows: pressing the piston unit 3, since the ball 5 blocks the liquid inlet 15 of the pump body 1, as the piston unit 3 moves downward as a whole, the space in the pump body 1 is compressed, so that the liquid pressure in the pump body 1 continuously increases, when the liquid pressure reaches a certain degree, the seal between the sealing part 312 of the skirt 311 and the fitting part 321 of the plunger rod 32 is broken, and the two are separated and form the side flow channel 7, and the liquid flows out through the side flow channel 7, so as to realize the liquid pumping function;

[0055] After the pressing is released, under the action of the elastic force of the spring 6, the fitting part 321 of the plunger rod 32 re-contacts the sealing part 312 of the skirt 311 to form an interference seal, and then the piston unit 3 moves upward as a whole, the space in the pump body 1 increases and forms a negative pressure, the ball 5 is opened by the liquid, and the liquid is sucked from the liquid inlet 15 of the pump body 1, so as to realize the liquid suction function, and the cycle is repeated.

[0056] Referring to Figure 1 As shown in the figure, in some embodiments, the pump body 1 is provided with an air hole 16, which is located above the skirt 311, to avoid affecting the sealing fit between the skirt 311 and the pump body 1. When the pump is installed on the container, the gas inside and outside the container can be communicated through the air hole 16, so as to balance the internal and external air pressure and ensure the smoothness of the liquid pumping.

[0057] Referring to Figure 5 The utility model also discloses a kind of injection devices, for example, nasal spray injection device, which comprises the pump of the above-mentioned spray weight adjustable, with the function of spray weight adjustment, for the use of different environments.

[0058] 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 ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model without departing from the principles and purposes of the utility model, and all these changes should belong to the protection scope of the utility model claim.

Claims

1. A spray weight adjustable pump characterized by, The pump comprises: a pump body (1) with a first contact part (11) inside the pump body (1) with adjustable height; a pump cover (2) fixedly arranged on the top of the pump body (1), the pump cover (2) having a second contact part (21) extending towards the bottom of the pump body (1); a piston unit (3) slidingly arranged in the pump body (1), the piston unit (3) being partially arranged between the first contact part (11) and the second contact part (21); wherein, in the pump liquid state, the piston unit (3) is in contact with the first contact part (11) and limits the lower dead point thereof, and in the liquid suction state, the piston unit (3) is in contact with the second contact part (21) and limits the upper dead point thereof.

2. The variable jet pump according to claim 1, wherein The inner side of the pump body (1) is provided with a protrusion (12), and the protrusion (12) and the inner wall of the pump body (1) form an annular groove (13); wherein, the groove (13) is filled with a liquid with adjustable volume, and the first contact part (11) is slidingly and sealingly arranged in the groove (13).

3. The variable specific capacity pump of claim 2, wherein, The pump body (1) is provided with a liquid injection hole (14), one end of the liquid injection hole (14) being communicated with the groove (13), and the other end being provided with a detachable plug (4).

4. The variable specific capacity pump of claim 2, wherein, The groove wall of the groove (13) is provided with a scale line.

5. The variable specific capacity pump of claim 1, wherein, The adjustable height of the first contact part (11) is 0-20mm.

6. The spray weight adjustable pump of claim 1, wherein, Further comprising: a ball (5) movably arranged at the inner bottom of the pump body (1), the ball (5) being used for selectively plugging the liquid inlet (15) of the pump body (1); a spring (6) arranged in the pump body (1), the spring (6) being used for supporting the piston unit (3).

7. The spray weight adjustable pump of claim 1, wherein, The piston unit (3) comprises: a piston body (31) having a skirt (311) slidingly and sealingly matched with the pump body (1), the inner side of the skirt (311) being provided with a sealing part (312); a plunger rod (32) slidingly penetrating the piston body (31), the outer periphery of the plunger rod (32) being provided with a matching part (321) accommodated in the skirt (311); in the liquid suction state, the sealing part (312) is in contact with and interference-fitted with the matching part (321), and in the pump liquid state, the sealing part (312) is separated from the matching part (321) and forms a side flow channel (7).

8. The spray weight adjustable pump of claim 7, wherein, The plunger rod (32) is provided with a plurality of axial flow guide grooves (322) at intervals.

9. The spray weight adjustable pump of claim 7, wherein, The pump body (1) is provided with an air hole (16) above the skirt (311), which is used for balancing the air pressure difference inside and outside the container.

10. A spraying device, characterized in that The pump comprises the pump with adjustable spray weight according to any one of claims 1-9.

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