One-way valve and pressing pump comprising same

Abstract

A one-way valve is applied to a pressing pump and comprises a valve piece and a valve seat, a feeding hole is formed in the valve seat, and the sectional area of the feeding hole is S1. The one-way valve further comprises a limiting piece which limits the distance from the valve piece to the valve seat. And when the valve part leaves the valve seat and moves to the position in contact with the limiting part, the sectional area of the minimum channel between the valve part and the valve seat is S2, the sectional area of the minimum gap between the valve part and the inner wall of the product channel is S3, the sectional area of the minimum gap between the valve part and the limiting part is S4, and S2, S3 and S4 are all larger than S1. The structure of the one-way valve can allow the product to flow more smoothly, thereby allowing the pressing pump to rebound smoothly after the product is distributed. The invention further discloses a pressing pump comprising the one-way valve.

Description

Technical Field

[0001] The present application belongs to the field of product dispensing devices, and in particular relates to a press pump for dispensing liquid or semi-liquid products from a container, and in particular to the design of a one-way valve in the press pump. Background Art

[0002] A press pump is usually installed on the packaging container of daily chemical products such as shampoo and shower gel. By pressing the press pump, the liquid or semi-liquid product in the container is pumped out for consumers to use. In the press pump, an elastic reset mechanism is provided to restore the press pump to its original position after pumping the product once for the next pumping. Traditional elastic reset mechanisms usually use metal springs. In order to meet environmental protection requirements, all-plastic pumps with plastic elastic reset mechanisms have also been developed on the market.

[0003] During the application of the push pump, it was found that for some products with particularly high viscosity due to special formulas, the push pump will show some problems during use. For example, when pumping the product, due to the high viscosity of the product and the uneven flow, the number of air compressions of the push pump increases, and the pumping volume of each pumping is small. Moreover, after pressing and discharging the material, due to the high viscosity of the product, the elastic reset mechanism rebounds slowly, jams during the rebound process, and sometimes does not rebound to the top dead center of its stroke, which further affects the pumping volume of the next pumping product. For all-plastic pumps that use plastic elastic reset mechanisms, these problems are even more obvious.

[0004] One solution to the above problem is to increase the elastic force of the elastic reset mechanism, improve the rebound performance to a certain extent, and ensure that the press pump can rebound to its standby position. However, when the elastic force of the elastic reset device is increased, the pressing force required by the user to press the press pump to pump the product will also increase, making the pressing feel heavier.

[0005] The applicant has found through research that one of the reasons for the above problems is that products with high viscosity will affect the action of the one-way valve of the press pump, making it impossible to close in time, which in turn makes it difficult to stop the flow of the product in time.

[0006] Therefore, in the field of compression pumps, there is a need for further improving the structure of compression pumps to overcome at least one of the above-mentioned technical problems. Summary of the invention

[0007] The present application is made to solve the problems existing in the prior art mentioned above. The purpose of the present application is to provide a one-way valve for a press pump with an improved structure, which can reduce the flow resistance of products with high viscosity, so that the product flows smoothly, thereby allowing the press pump to rebound smoothly after dispensing the product.

[0008] The present application provides a one-way valve, which is used in a press pump, wherein the one-way valve includes a valve member and a valve seat, a feed hole is formed in the valve seat, and the cross-sectional area of ​​the feed hole is S1, wherein when the valve member and the valve seat are matched together, the one-way valve is closed, and when the valve member leaves the valve seat, the one-way valve is opened, and wherein the one-way valve also includes a limiter, which limits the distance of the valve member from the valve seat. When the valve member leaves the valve seat and moves to a position in contact with the limiter, the cross-sectional area of ​​the minimum channel between the valve member and the valve seat is S2, the cross-sectional area at the minimum gap between the valve member and the inner wall of the product channel is S3, and the cross-sectional area at the minimum gap between the valve member and the limiter is S4, wherein S2, S3 and S4 are all greater than S1.

[0009] In the structure of the one-way valve, when the valve member moves to the position in contact with the limit member, the cross-sectional area S2 of the minimum channel between the valve member and the valve seat, the cross-sectional area S3 of the portion corresponding to the minimum gap between the valve member and the inner wall of the product channel, and the cross-sectional area S4 of the portion corresponding to the minimum gap between the valve member and the limit member are all made larger than the cross-sectional area S1 of the feed hole, which can minimize the risk of channel bottlenecks, allow the product to flow more smoothly, and thereby allow the press pump to rebound smoothly after dispensing the product.

[0010] In an exemplary structure, the stopper is formed into a cross shape. Of course, in addition to the cross shape, the stopper can also be formed into other required structures.

[0011] In an exemplary structure, the valve member includes a valve member body and a guide rod connected to the valve member body, a guide tube is formed in the stopper, and the guide tube can be fitted in the guide tube. The cooperation between the guide rod and the guide tube helps to control the movement direction of the valve member, so that it can return to the position matched with the valve seat more smoothly.

[0012] Preferably, an anti-slip mechanism is formed on the guide rod, and the anti-slip mechanism is configured to prevent the guide rod from easily slipping out of the guide tube when the guide rod is engaged in the guide tube.

[0013] In another exemplary structure, the limiting mechanism includes at least two claws. The claws can extend upward from the inside of the cylinder of the pressing pump, and the upper ends of the at least two claws are hooks, which cooperate with each other to limit the upward movement of the valve member.

[0014] Preferably, a guide surface is formed on the inner side of the feed hole, and the guide surface is formed into a streamlined shape. The streamlined guide surface helps to reduce the flow resistance of the product when it flows through the feed hole.

[0015] A press pump is also disclosed, which includes a pressure head, a toothed sleeve and a cylinder, wherein the toothed sleeve and the cylinder are fixedly connected together, a piston rod is connected to the lower part of the pressure head, the piston rod extends into the cylinder, a piston is arranged at the lower part of the piston rod, and the piston is interference-fitted with the inner surface of the cylinder. The press pump also includes the one-way valve as described above.

[0016] Preferably, a sealing sleeve is formed on the inner surface of the cylinder, and when the pressure head is pressed downward, the sealing sleeve can be sealed with the piston, and the limiter is located below the sealing sleeve. The sealing sleeve can improve the sealing performance of the pressing pump and reduce the risk of product leakage.

[0017] In a specific embodiment, the limiting member is formed integrally with the cylinder.

[0018] Furthermore, the pressing pump further comprises: an elastic reset mechanism, the lower end of which is fixedly connected to the cylinder; and a suction tube, which is connected to the lower end of the elastic reset mechanism or to the cylinder. The valve seat is formed on one of the cylinder, the lower end of the elastic reset mechanism and the suction tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings show non-limiting preferred implementation structures of the present invention, and the features and advantages of the present invention can be more clearly seen in conjunction with the accompanying drawings.

[0020] Figure 1 A cross-sectional view of the pressing pump according to the first embodiment of the present application is shown, wherein the pressing pump is in a downward pressing state.

[0021] Figure 2a Another cross-sectional view of the compression pump of the first embodiment is shown, wherein the compression pump is in an upper standby state.

[0022] Figure 2b A cross section of a feed hole is schematically shown.

[0023] Figure 2c It is schematically shown that the cross-sectional area of ​​the minimum passage between the valve member and the valve seat is.

[0024] Figure 2d The cross-sectional area at the minimum gap between the valve element and the inner wall of the product channel is schematically shown.

[0025] Figure 2e The cross-sectional area at the minimum gap between the valve member and the limiting member is schematically shown.

[0026] Figure 3 Shows Figure 1 A bottom-up stereoscopic view of the cylinder of the pressing pump, in which the stopper can be clearly seen.

[0027] Figure 4A cross-sectional view of a pressing pump according to a second embodiment of the present application is shown, wherein the pressing pump is in a downward pressing state.

[0028] Figure 5 Another cross-sectional view of the pressing pump of the second embodiment is shown, wherein the pressing pump is in an upper standby state.

[0029] Figure 6 Shows Figure 4 A bottom-up stereoscopic view of the cylinder of the pressing pump, in which the stopper can be clearly seen.

[0030] Figure 7 Shows Figure 4 A three-dimensional view of the valve components of the one-way valve of the press pump.

[0031] Figure 8 A partial cutaway schematic diagram of a pressing pump according to a third embodiment of the present application is shown.

[0032] Fig. 9 Shows Figure 8 A partial cross-sectional view of some components of a compression pump.

[0033] (Explanation of symbols)

[0034] 100 pumps

[0035] 110 pressure head

[0036] 120 braces

[0037] 130 cylinders

[0038] 131 sealing sleeve

[0039] 132 Elastic reset mechanism

[0040] 140 piston rod

[0041] 141 Piston

[0042] 150 Check Valve

[0043] 151 valve parts

[0044] 152 valve seat

[0045] 153 Feed hole

[0046] 160 limiter

[0047] 170 Straws

[0048] 200 pumps

[0049] 210 pressure head

[0050] 220 braces

[0051] 230 cylinder

[0052] 240 piston rod

[0053] 250 Check Valve

[0054] 251 valve parts

[0055] 252 valve seat

[0056] 253 guide rod

[0057] 254 Hemisphere

[0058] 255 anti-slip structure

[0059] 260 limiter

[0060] 261 guide tube

[0061] 300 pumps

[0062] 310 pressure head

[0063] 320 braces

[0064] 330 cylinder

[0065] 350 Check Valve

[0066] 351 valve parts

[0067] 352 valve seat

[0068] 360 limiter

[0069] 370 Straws DETAILED DESCRIPTION

[0070] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the drawings only show preferred embodiments of the present invention, which do not constitute a limitation on the scope of the present invention. Those skilled in the art can make various obvious modifications, variations, and equivalent substitutions to the present invention based on the embodiments shown in the drawings, and the technical features of the different embodiments described below can be arbitrarily combined with each other without contradiction, which all fall within the scope of protection of the present invention.

[0071] <First Embodiment>

[0072] Figures 1 to 3 An exemplary structural diagram of the pressing pump 100 and some components thereof according to the first embodiment of the present application is shown.

[0073] Figure 1The cross-sectional view of the pressing pump 100 is shown, wherein the pressing head 110 of the pressing pump 100 is in a pressed lower position. The pressing pump 100 includes the pressing head 110, a toothed sleeve 120 and a cylinder 130. The toothed sleeve 120 and the cylinder 130 are fixedly connected together.

[0074] A piston rod 140 is connected to the lower part of the pressure head 110, and a piston 141 is installed on the lower end of the piston rod 140. The piston rod 140 extends into the cylinder 130, and the piston 141 is interference-fitted with the inner wall of the cylinder 130.

[0075] A one-way valve 150 is disposed below the piston rod 140. The one-way valve 150 includes a valve member 151 and a valve seat 152. Figure 1 In the structures shown in and 2, the valve member 151 is specifically in the form of a valve ball, and the valve seat 152 is formed at the lower part or below the cylinder 130. Specifically, in the exemplary structure shown in the figure, the lower end of the elastic reset mechanism 132 (such as a plastic spring) is fixedly connected to the lower end of the cylinder 130, and the valve seat 152 is formed inside the lower end of the elastic reset mechanism 132. Alternatively, the one-way valve 150 can also be formed inside the cylinder 130. The valve member 151 can be in the form of a valve ball as shown in the figure. When the pressure head 110 and the piston rod 140 are pressed downward, as shown in Figure 1 As shown, the internal pressure of the cylinder 130 increases, causing the valve member 151 to fit tightly against the valve seat 152 , and the one-way valve 150 is closed, preventing the product in the container (not shown) from flowing into the cylinder 130 of the pressing pump 100 .

[0076] A suction pipe 170 is connected below the valve seat 152, and a feed hole 153 is formed at the portion where the valve seat 152 and the suction pipe 170 are connected. The feed hole 153 is located below the valve member 151, and its diameter D1 ( Figure 2a ) is preferably substantially equal to the diameter of the straw 170. Further preferably, the inner wall of the feed hole 153 is formed with a guide surface, and the shape of the guide surface is set to be streamlined. The streamlined guide surface of the feed hole 153 helps to reduce the flow resistance of the product when it flows from the straw 170 through the feed hole 153.

[0077] like Figure 2a As shown, when the pressure head 110 is reset upward, the pressure in the cylinder 130 is reduced, so that the valve member 151 leaves the valve seat 152 , and the one-way valve 150 is opened, allowing the product in the container to flow into the cylinder 130 .

[0078] A sealing sleeve 131 is preferably provided on the inner wall of the cylinder 130. When the pressure head 110 is pressed downward to pump the product, the piston 141, specifically the outer ring of the piston 141, can cooperate with the sealing sleeve 131. Figure 1 As shown in , the sealing performance of the pressing pump 100 is improved to prevent product leakage.

[0079] Furthermore, the one-way valve 150 of the pressing pump 100 further includes a stopper 160, which can be disposed at the lower end of the cylinder 130, or the stopper 160 can be formed integrally with the cylinder 130. Figure 3 As can be seen more clearly in the figure, the stopper 160 is located above the valve member 151, and is used to prevent the valve member 151 from being uncontrollably separated from the valve seat 152 and unable to smoothly return to the position matched with the valve seat 152. Further, in the present application, by providing the stopper 160, the distance between the valve member 151 and the valve seat 152 is limited, so that after pumping the product, the valve member 151 can return to the valve seat 152 faster.

[0080] In the exemplary structure shown in the figure, the limiting member 160 is a cross-shaped structure. On this basis, those skilled in the art can make other modifications to the structure of the limiting member 160, for example, the limiting member 160 can be formed into a cross-shaped structure.

[0081] Furthermore, in the present application, on the basis of setting the stopper 160 to limit the distance of the valve member 151 from the valve seat 152 when pumping the product, the inner diameter of the product channel from the valve seat 152 to the stopper 160 is set, and then the width of the product channel outside the valve member 151 is set to provide a sufficient flow cross-sectional area for the product flow, thereby improving the fluidity of the product. The details will be described in detail below.

[0082] like Figure 2a to 2e As shown, after pumping the product once, the user removes the pressing force applied to the pressure head 110, and under the action of the elastic reset mechanism, the pressure head 110 moves upward together with the piston rod 140 to its initial upper standby position. During this process, the valve member 151 moves upward away from the valve seat 152 under the pressure of the product in the container until it contacts the stopper 160 and is stopped from moving upward.

[0083] At this time, the width of the minimum passage between the valve member 151 and the valve seat 152 is W2, and the cross-sectional area of ​​the minimum passage is S2 (see Figure 2a and 2c ), the cross-sectional area S2 is larger than the cross-sectional area S1 of the feed hole 153 (see Figure 2b ).

[0084] In addition, the width of the minimum gap between the valve member 151 and the inner wall of the product channel is W3, and the corresponding part of the minimum gap forms a cross-sectional area S3 (see Figure 2a and 2d ), the cross-sectional area S3 is also larger than the cross-sectional area S1 of the feed hole 153.

[0085] Furthermore, the width of the minimum gap between the valve member 151 and the stop member 160 is W4, and the cross-sectional area of ​​the corresponding portion of the minimum gap is S4 (see Figure 2a and 2e ), the cross-sectional area S4 is also larger than the cross-sectional area S1 of the feed hole 153.

[0086] By making the cross-sectional area S2 of the minimum channel between the valve member 151 and the valve seat 152, the cross-sectional area S3 of the portion corresponding to the minimum gap between the valve member 151 and the inner wall of the product channel, and the cross-sectional area S4 of the portion corresponding to the minimum gap between the valve member 151 and the limit member 160 all larger than the cross-sectional area S1 of the feed hole 153, the risk of channel bottlenecks can be minimized, allowing the product to flow more smoothly, thereby allowing the press pump to rebound smoothly after dispensing the product.

[0087] <Second Embodiment>

[0088] Figures 4 to 7 The pressing pump 200 of the second embodiment of the present application is shown. Unless otherwise described or conflicting, the specific structure described above with respect to the first embodiment is also applicable to the second embodiment. In the following description, the same structure will not be described in detail, and the structure of the second embodiment different from the first embodiment will be specifically described.

[0089] like Figure 4 and 5 As shown, the pressing pump 200 includes a pressure head 210 , a toothed sleeve 220 , a cylinder 230 and a piston rod 240 , a limit member 260 is arranged at the lower part of the cylinder 130 , and a one-way valve 250 of the pressing pump 200 is arranged below the limit member 260 .

[0090] In the second embodiment, the valve member 251 of the one-way valve 250 includes a guide rod 253, which is connected to a body of the valve member 251 in the form of a hemispherical body 254. The body of the valve member 251 can also be formed into other shapes according to the needs of actual application occasions, which is also within the scope of the present application.

[0091] Accordingly, a guide tube 261 is formed in the stopper 260, and the guide tube 261 is configured to have a cross-sectional shape that matches the cross-sectional shape of the guide rod 253, so that the guide rod 253 can be received in the guide tube 261 and move in the up-down direction in the guide tube 261. Further, an anti-slip structure 255 is formed on the guide rod 253, and when the guide rod 253 is installed in the guide tube 261, the anti-slip structure 255 helps prevent the guide rod 253 from easily slipping out of the guide tube 261. For example, the anti-slip structure 255 can be a buckle convex ring formed on the guide rod 253.

[0092] <Third Embodiment>

[0093] Figure 8 and 9 The pressing pump 300 of the third embodiment of the present application is shown. Unless otherwise described or conflicting, the specific structures described above with respect to the first and second embodiments also apply to the third embodiment. In the following description, the same structures will not be described in detail, and the structures different from the first and second embodiments of the third embodiment will be described in detail.

[0094] The pressing pump 300 includes a pressure head 310, a tooth sleeve 320 and a cylinder 330, and a suction pipe 370 is connected to the lower part of the cylinder 330. The cylinder 330 and the suction pipe 370 are provided below the cylinder 330, and can be connected together by a clamp ring-slot structure, or can be connected by other structures, such as a threaded structure.

[0095] As shown in the figure, the valve seat 352 of the one-way valve 350 is formed at the upper part of the suction pipe 370, that is, at the part of the suction pipe 370 connected to the cylinder 330. A stopper 360 is formed on the inner wall of the cylinder 330. The stopper 360 is formed in the form of two or more claws, which extend upward from the bottom of the cylinder 330, and hooks are formed on the top of the claws. These hooks work together to limit the stroke of the valve member 351 leaving the valve seat 352 and moving upward.

[0096] The structures of various specific embodiments of the present application are described in detail above. Those skilled in the art can make various modifications, variations and combinations of features in various embodiments based on these embodiments, which are all within the scope of the present application.

Claims

1. A one-way valve, the one-way valve is used for a press pump, wherein the one-way valve comprises a valve member and a valve seat, a feed hole is formed in the valve seat, and the cross-sectional area of ​​the feed hole is S1, wherein when the valve member and the valve seat are matched together, the one-way valve is closed, and when the valve member leaves the valve seat, the one-way valve is opened, and wherein the one-way valve further comprises a limiter, the limiter limits the distance of the valve member from the valve seat, characterized in that, When the valve member moves away from the valve seat to a position in contact with the limit member, the cross-sectional area of ​​the minimum channel between the valve member and the valve seat is S2, the cross-sectional area of ​​the minimum gap between the valve member and the inner wall of the product channel is S3, and the cross-sectional area of ​​the minimum gap between the valve member and the limit member is S4, wherein S2, S3 and S4 are all greater than S1.

2. The one-way valve according to claim 1, characterized in that: The limiting member is formed in a cross shape.

3. The one-way valve according to claim 1, characterized in that: The valve member comprises a valve member body and a guide rod connected to the valve member body. A guide tube is formed in the position-limiting member, and the guide tube can be fitted in the guide tube.

4. The one-way valve according to claim 3, characterized in that: An anti-slip mechanism is formed on the guide rod, and the anti-slip mechanism is configured to prevent the guide rod from easily slipping out of the guide tube when the guide rod is engaged in the guide tube.

5. The one-way valve according to claim 1, characterized in that: The limiting mechanism comprises at least two claws.

6. The one-way valve according to claim 1, characterized in that: A guide surface is formed on the inner side of the feed hole, and the guide surface is formed into a streamline shape.

7. A pressing pump, comprising a pressure head, a toothed sleeve and a cylinder, wherein the toothed sleeve and the cylinder are fixedly connected together, a piston rod is connected to the lower part of the pressure head, the piston rod extends into the interior of the cylinder, a piston is arranged at the lower part of the piston rod, the piston is interference fit with the inner surface of the cylinder, and is characterized in that: The pressing pump further comprises a one-way valve according to any one of claims 1 to 6.

8. The pressing pump according to claim 7, characterized in that: A sealing sleeve is formed on the inner surface of the cylinder. When the pressure head is pressed downward, the sealing sleeve can be sealed and matched with the piston. The limiting member is located below the sealing sleeve.

9. The pressing pump according to claim 7, characterized in that: The limiting member is formed integrally with the cylinder.

10. The pressing pump according to claim 7, wherein: The pressing pump further comprises: an elastic reset mechanism, the lower end of which is fixedly connected to the cylinder; and A straw connected to the lower end of the elastic reset mechanism or to the cylinder; Wherein, the valve seat is formed on one of the cylinder, the lower end of the elastic reset mechanism and the suction tube.

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