CN216187535U

CN216187535U - Pressing pump capable of discharging liquid rapidly

Info

Publication number: CN216187535U
Application number: CN202122875769.6U
Authority: CN
Inventors: 丁祥
Original assignee: Taixing KK Plastic Co ltd
Current assignee: Taixing KK Plastic Co ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-04-05
Anticipated expiration: 2031-11-23

Abstract

A pressing pump capable of discharging liquid quickly comprises a pressing head, a piston rod, a tooth socket and an air cylinder. At least one through hole opening into the inner space of the piston rod is formed at the lower end of the piston rod, and the piston can move in the up-and-down direction relative to the piston rod to open and close the through hole, thereby forming an upper check valve of the pressure pump. And a forced opening mechanism is arranged at the lower part of the cylinder and can be abutted against the piston, so that the piston moves upwards relative to the piston rod, and the through hole is opened. The pressing pump with the structure allows the upper one-way valve to be quickly opened to pump out products, and reduces the number of times of air pressure.

Description

Pressing pump capable of discharging liquid rapidly

Technical Field

The present invention relates to a mechanism for pumping products such as household chemical products, and in particular to a push pump which is able to dispense liquid quickly, i.e. to pump out the product in a container quickly.

Background

In fields such as daily chemical products (e.g., body wash, hand sanitizer, shampoo, cosmetics, etc.), a container containing the product is fitted with a push pump so that a user can easily dispense the product from the container for use. Here, the pressing pump can be used to pump a flowable product in a fluid or semi-fluid state such as an emulsion, a liquid, or the like.

For certain types of products, such as skin care, spray type products, the pumped volume of the product per use is small. In this case, problems are encountered when pumping the product using a push pump. For example, when the liquid is used for the first time, the liquid needs to be pressed for several times or tens of times to be discharged, which brings trouble to consumers. This problem is particularly prominent in the case of a spray pump with a precompression function, and the problem of a high number of times of air pressure has been difficult to solve.

The main reasons for the large number of times of the air compression of the pressing pump are as follows: firstly, the output of the product pressed by the pressing pump each time is smaller, so that less air is discharged by pressing the pressing pump each time before liquid is discharged, the generated negative pressure is smaller, and the product in the container can only climb upwards a little during each pressing; secondly, the upper check valve of the pressing pump usually has a pre-pressing function, and needs to be opened only by accumulating enough pressure in the pump body, so that the upper check valve needs to be pressed for many times to accumulate enough pressure in the pump body to overcome the pre-pressing force of the upper check valve, otherwise, gas is held back in a cylinder of the pressing pump, so that the number of times of air pressure is increased, and even liquid cannot be discharged.

Therefore, in the field of pressing pumps, there is a need for improving the structure of the pressing pump so as to solve the problems that the number of times of air pressure is large and even liquid can not be discharged.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve the above-mentioned problems occurring in the prior art. The utility model aims to provide a pressing pump with an improved structure, which can realize the effect of quickly discharging liquid.

The utility model provides a pressing pump capable of discharging liquid quickly, which comprises a pressing head, a piston rod, a tooth socket and an air cylinder, wherein the tooth socket is connected with the air cylinder, one end of the piston rod is connected with the lower part of the pressing head, the other end of the piston rod is provided with a piston and extends into the inner space of the air cylinder, and the lower part of the air cylinder is provided with a lower one-way valve. Wherein at least one through hole opened into the inner space of the piston rod is formed at the lower end of the piston rod, and the piston can move in the up-and-down direction with respect to the piston rod to open and close the through hole, thereby forming an upper check valve of the push pump. And, be provided with in the lower part of cylinder and force opening mechanism, when pressing the pressure head and make the pressure head drive piston rod and piston move near stroke bottom dead center, force opening mechanism can with the piston butt for the piston moves for the piston is for the piston rod to open the through-hole.

The upper check valve in the above-described structure can be rapidly opened, thereby enabling the product to be rapidly pumped out, reducing the number of times of air pressure.

In one configuration, the forced opening mechanism is a forced sleeve disposed on the lower check valve.

Specifically, the lower check valve includes: the lower check valve is fixedly arranged at the lower part of the cylinder through the fixing part; the valve plate is connected with the fixing part through a plurality of connecting parts; wherein, the forcing sleeve is formed by extending upwards from the fixing part.

Alternatively, in another structure, the forcible opening mechanism is preferably a forcible opening portion integrally formed at a lower portion of the cylinder and extending upward. Of course, the forced opening portion may be a part separately manufactured and mounted to the cylinder.

Preferably, a notch portion and/or an opening that communicates with the through hole is formed on the forced opening mechanism, thereby forming a passage from the inside of the cylinder to the inside of the piston rod.

Preferably, the pressing pump further includes a piston return spring supported between the piston rod and the piston, the piston return spring moving the piston downward relative to the piston rod to close the through hole when the pressing head carries the piston rod and the piston upward.

Specifically, a shoulder portion is formed on an outer peripheral surface of the piston rod, one end of the piston return spring abuts on the shoulder portion, and the other end of the piston return spring abuts on the piston.

Preferably, the piston comprises a piston outer ring and a piston inner ring, the piston outer ring is in sliding sealing fit with the inner wall of the cylinder, and the piston inner ring can open and close the through hole. Thus, the upper check valve is formed by the cooperation of the piston inner ring and the through hole on the cylinder.

Preferably, an inner boss is formed inside the lower portion of the inner ring of the piston, an outer boss is formed at the lower end of the piston rod, and the inner boss and the outer boss cooperate to prevent the piston from being separated from the piston rod.

Further, when the inner and outer bosses abut each other, a seal may be formed between the inner and outer bosses. This makes it possible to close the upper check valve more reliably.

Drawings

There is shown in the drawings, which are incorporated herein by reference, non-limiting preferred embodiments of the present invention, the features and advantages of which will be apparent. Wherein:

fig. 1a shows a sectional view of a first embodiment of the present invention of a push pump with a ram at stroke top dead center.

Fig. 1b shows another cross-sectional view of the pressing pump of the first embodiment of the present invention, in which the ram of the pressing pump is at the stroke bottom dead center.

Fig. 2a shows a top view of the lower check valve in the pressure pump of fig. 1 a.

Figure 2b shows a cross-sectional view of the lower one-way valve of figure 2 a.

Fig. 2c shows a perspective view of the lower one-way valve of fig. 2 a.

Fig. 3 shows a cross-sectional view of a piston in the push pump of fig. 1 a.

Fig. 4 shows an enlarged view of part a in fig. 1 b.

Fig. 5a shows a cross-sectional view of a second embodiment of the present invention of a push pump with the ram at top dead center of travel.

Fig. 5b shows another cross-sectional view of a push pump according to a second embodiment of the present invention, wherein the ram of the push pump is at stroke bottom dead center.

Fig. 6 shows an enlarged view of part B in fig. 5B.

(symbol description)

100 pressing pump

110 indenter

120 tooth socket

130 cylinder

131 first deformable wall part

140 piston rod

141 through hole

142 outer boss

143 shoulder part

150 lower check valve

151 fixed part

152 valve sheet

153 connecting part

154 forced sleeve

160 piston

161 piston outer ring

162 inner ring of piston

163 inner boss

164 piston crown

171 ram return spring

172 piston return spring

200 push pump

210 ram

220 tooth socket

230 cylinder

231 forced opening part

232 notch part

240 piston rod

241 through hole

250 piston

Detailed Description

In order to facilitate understanding of the present invention, specific embodiments thereof will be described in detail below with reference to the accompanying drawings. It is to be understood that only the preferred embodiment of the present invention has been shown in the drawings and should not be considered as limiting the scope of the utility model. Obvious modifications, variations and equivalents will occur to those skilled in the art on the basis of the embodiments shown in the drawings, and the technical features of the different embodiments described below may be combined with each other arbitrarily without contradiction, all of which fall within the scope of the present invention.

In the following detailed description of the present invention, terms indicating directions and orientations such as "up" and "down" are used with reference to the general orientation of the pressing pump shown in the drawings in a use state, and it is understood that the orientation of the pressing pump may be changed in cases such as transportation, storage, and the like.

< first embodiment >

Fig. 1a and 1b show two sectional views of a pressing pump 100 according to a first embodiment of the present invention, wherein in fig. 1a the pressing head 110 of the pressing pump 100 is at its stroke top dead center position, and in fig. 1b the pressing head 110 of the pressing pump 100 is at its stroke bottom dead center position.

The pressing pump 100 includes a pressing head 110, a mouthpiece 120, and a cylinder 130, a piston rod 140 is connected below the pressing head 110, and the mouthpiece 120 is connected with the cylinder 130. A lower check valve 150 is installed in the cylinder 130, and the lower check valve 150 is specifically installed in a lower portion of the cylinder 130.

Fig. 2 a-2 c illustrate an exemplary configuration of the lower check valve 150 of the compression pump 100. The lower check valve 150 includes a fixing portion 151, and the lower check valve 150 is fixedly installed inside the cylinder 130 by the fixing portion 151. The fixing portion 151 has a substantially annular shape, and a valve sheet 152 is provided substantially at the center inside the fixing portion 151, and the valve sheet 152 is connected to the fixing portion 151 by a plurality of (three in the drawing) connecting portions 153. The connecting portion 153 is elastically deformable so that the valve sheet 152 can move up and down in the fixing portion 151 along the axial direction of the lower check valve 150 to open and close the lower check valve 150.

The lower check valve 150 further includes a forcing sleeve 154 formed to extend upward from the fixing portion 151. The forcing sleeve 154 is configured such that when the ram 110 of the pressing pump 100 is pressed downward to a point where it forms a bottom dead center, the forcing sleeve 154 can push the piston 160 on the piston rod 140 upward to open the upper check valve, as will be described below with reference to the drawings.

A piston 160 is connected at or near a position of a lower end of the piston rod 140, and a portion of the piston rod 140 to which the piston 160 is connected protrudes into an inner space of the cylinder 130. Fig. 3 shows a sectional view of a piston 160, the piston 160 having an outer piston ring 161 and an inner piston ring 162. A sealing engagement is formed between the piston outer race 161 and the inner wall of the cylinder 130.

Turning to fig. 4, which shows an enlarged view of portion a of fig. 1a, it can be seen that a through hole 141 is provided at the lower end of the piston rod 140, and the inner ring 162 of the piston 160 can close the through hole 141, so that they cooperate with each other to form an upper check valve for pressing the pump 100. When the ram 110 is at the top dead center of its stroke, the piston 160 closes and seals the through hole 141. During the process of pressing down the ram 110, the piston 160 moves downward, and under the action of the friction force between the outer ring 161 of the piston and the inner wall of the cylinder 130, the piston 160 moves upward relative to the piston rod 140 to expose the through hole 141, thereby opening the upper check valve of the pressing pump 100.

The open state of the upper check valve can be seen more clearly in the enlarged view shown in fig. 4. When the ram 110 is pressed to the vicinity of the bottom dead center of its stroke, the forcing sleeve 154 formed on the lower check valve 150 abuts against the piston 160, for example, a lower portion of a piston outer ring 161 of the piston 160 as shown in the drawing. As the ram 110 is further depressed, the piston 160 is forced upward by the forcing sleeve 154 to expose the through hole 141 in the piston rod 140. Thus, the force sleeve 154 may ensure that the upper check valve opens when the ram 110 is depressed and may help to quickly open the upper check valve.

With reference to fig. 3 and 4, in a preferred construction, an inner boss 163 is formed on the inner side of the inner ring 162 of the piston 160, and an outer boss 142 is correspondingly formed on the lower end of the piston rod 140. The inner boss 163 and the outer boss 142 cooperate to prevent the piston 160 from falling off the piston rod 140.

Returning to fig. 1a and 1b, the push pump 100 further comprises an elastic return means, such as a ram return spring 171 supported between the piston rod 140 and the cylinder 130. The ram return spring 171 is capable of returning the ram 110, with the piston rod 140 and the piston 160 on the piston rod 140, to its top-dead-center position of travel after the user removes the pressing force applied to the ram 110.

In the pressing pump 100 of the present invention, it is preferable that a piston return spring 172 is further provided, and one end of the piston return spring 172 abuts on the piston crown 164 of the piston 160 and the other end abuts on a shoulder 143 of the piston rod 140, the shoulder 143 being formed on the outer circumferential surface of the piston rod 140. By this piston return spring 172, when the user removes the pressing force applied to the ram 110 to move the ram 110 toward the top dead center of its stroke, the piston 160 is moved downward relative to the piston rod 140, so that the piston inner ring 162 closes the through hole 141, that is, the upper check valve is closed.

The operation principle of the pressing pump 100 will be explained below.

In fig. 1a, the ram 110 of the push pump 100 is at the stroke top dead center, and the inner ring 162 of the piston 160 seals the through hole 141, so that the upper check valve is closed.

When a user presses the ram 110 downward, the piston 160 tends to move upward relative to the piston rod 140 by friction between the outer piston ring 161 of the piston 160 and the inner wall of the cylinder 130. When the piston 160 moves into contact with the forcing sleeve 154 on the lower check valve 150, the forcing sleeve 154 will apply an upward pushing force to the piston 160, thereby accelerating the upward movement of the piston 160 relative to the piston rod 140, exposing the through hole 141 in the piston rod 140, whereby the upper check valve of the pressure pump 100 opens. At this time, the product in the inner space of the cylinder 130 enters the space in the piston rod 140 through the through hole 141 and moves upward, and is finally ejected by the ram 110.

After the pressing force applied to the ram 110 is removed, the ram 110 is returned upward to its stroke top dead center together with the piston rod 140 and the piston 160 by the ram return spring 171. In the process, the piston 160 moves downward with respect to the piston rod 140 by the frictional force between the piston outer ring 161 and the inside of the cylinder 130. And, the piston return spring 172 applies a downward pressure to the piston 160, accelerating the downward movement of the piston 160 with respect to the piston rod 140, thereby enabling rapid closure of the through-hole 141, i.e., closing of the upper check valve.

And, during the upward movement of the ram 110, a negative pressure is generated in the inner space of the cylinder 130, which causes the valve plate 152 of the lower check valve 150 to move upward, so that the lower check valve 150 is opened, and the product in the container can enter the inner space of the cylinder 130 for the next pumping.

< second embodiment >

Fig. 5a to 6 show a pressing pump 200 according to a second embodiment of the present invention. In the following description of the second embodiment, the technical features of the second embodiment different from those of the first embodiment will be mainly described, and unless there is a contrary description in the following or conflicting with other technical features, the features described in the first embodiment are also applicable to the second embodiment, and will not be described in detail herein.

The pressing pump 200 includes a pressing head 210, a mouthpiece 220 and a cylinder 230, the mouthpiece 220 and the cylinder 230 are connected together, one end of a piston rod 240 is connected below the pressing head 210, and the other end is provided with a piston 250 and extends into the inner space of the cylinder 230.

In the pressing pump 200, as can be seen more clearly from the enlarged view of fig. 6, a forcible opening portion 231 is formed at the lower portion of the cylinder 230, the forcible opening portion 231 functions as a forcible opening mechanism of the pressing pump 200, and when the ram 210 moves downward to the vicinity of the stroke bottom dead center thereof, the forcible opening portion 231 comes into contact with the piston 250, accelerates the upward movement of the piston 250 with respect to the piston rod 140, and thus rapidly opens the upper check valve.

As shown in fig. 6, a notch portion 232 is formed at the top of the forcible opening portion 231, and when the ram 110 is pressed to the bottom, the notch portion 232 communicates with the through hole 241, forming a passage from the inside of the cylinder 230 to the inside of the piston rod 240.

Here, it should be noted that the notch portion 232 on the top of the forcible opening portion 231 in the pressing pump 200 may also be applied to the top of the forcible sleeve 154 of the lower check valve 150 of the pressing pump 100 of the first embodiment.

Alternatively, in addition or as an alternative, an opening may be formed at other positions of the forcing sleeve 154 in addition to the top of the forcing sleeve 154, the opening communicating with the through-hole 241 to form a passage from the inside of the cylinder 230 to the inside of the piston rod 240.

Claims

1. A pressing pump capable of discharging liquid quickly comprises a pressing head, a piston rod, a tooth socket and an air cylinder, wherein the tooth socket is connected with the air cylinder, one end of the piston rod is connected with the lower part of the pressing head, the other end of the piston rod is provided with a piston and extends into the inner space of the air cylinder, the lower part of the air cylinder is provided with a lower one-way valve, and the pressing pump is characterized in that,

at least one through hole opened into an inner space of the piston rod is formed at a lower end of the piston rod, and the piston is movable in an up-and-down direction with respect to the piston rod to open and close the through hole, thereby forming an upper check valve of the push pump; and

and a forced opening mechanism is arranged at the lower part of the cylinder, and when the pressure head is pressed to enable the pressure head to drive the piston rod and the piston to move to the position near a stroke bottom dead center, the forced opening mechanism can be abutted against the piston, so that the piston moves upwards relative to the piston rod, and the through hole is opened.

2. The compression pump of claim 1, wherein the forced opening mechanism is a forced sleeve disposed on the lower check valve.

3. The compression pump as recited in claim 2, wherein the lower one-way valve comprises: the lower check valve is fixedly arranged at the lower part of the cylinder through the fixing part; the valve plate is connected with the fixing part through a plurality of connecting parts; wherein the forcible sleeve is formed by extending upward from the fixing portion.

4. The pressing pump as claimed in claim 1, wherein the forced opening mechanism is a forced opening part integrally formed at a lower portion of the cylinder and extended upward.

5. A pressing pump according to any one of claims 1 to 4, wherein a notch and/or an opening is formed in the forced opening mechanism, the notch and/or the opening communicating with the through hole to form a passage from the inside of the cylinder to the inside of the piston rod.

6. The compression pump as claimed in claim 1, further comprising a piston return spring supported between the piston rod and the piston, the piston return spring moving the piston downward relative to the piston rod to close the through hole when the ram carries the piston rod and the piston upward.

7. The pressing pump according to claim 6, wherein a shoulder portion is formed on an outer peripheral surface of the piston rod, one end of the piston return spring abuts on the shoulder portion, and the other end of the piston return spring abuts on the piston.

8. The compression pump as claimed in claim 1, wherein the piston includes an outer piston ring and an inner piston ring, the outer piston ring being in sliding sealing engagement with an inner wall of the cylinder, the inner piston ring being capable of opening and closing the through hole.

9. The pressing pump according to claim 8, wherein an inner boss is formed inside a lower portion of the inner ring of the piston, and an outer boss is formed at a lower end of the piston rod, the inner boss and the outer boss cooperating to prevent the piston from being separated from the piston rod.

10. The compression pump of claim 9, wherein a seal is formed between the inner boss and the outer boss when the inner boss and the outer boss abut one another.