Quantitative pressure pump and beverage equipment

Abstract

The quantitative pressure pump comprises a main shell and a quantitative assembly, the main shell is provided with a containing cavity, the quantitative assembly comprises a pressing rod, an elastic piston cylinder and a discharging pipe, the elastic piston cylinder is provided with a material storage cavity, a feeding end and a discharging end, the pressing rod is connected to the main shell in a sliding mode and extends into the containing cavity, and the discharging end is connected with the main shell in a sliding mode. The elastic piston cylinder is arranged in the containing cavity, the upper end of the elastic piston cylinder is connected with the pressing rod, the lower end of the elastic piston cylinder is connected with the main shell, and the discharging pipe is connected with the discharging end. A first blocking ball is arranged in the feeding end, a second blocking ball is arranged on the discharging pipe, when the pressing rod slides downwards, the elastic piston barrel is compressed, the first blocking ball can block the feeding end, and the discharging end is communicated with the discharging pipe. When the pressing rod slides upwards, the elastic piston cylinder is stretched, the second blocking ball can block the discharging pipe, the storage cavity communicates with the feeding end, the capacity of the storage cavity of the elastic piston cylinder in the quantitative pressure pump is fixed, and quantitative feeding can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure pump manufacturing, in particular to a quantitative pressure pump and beverage equipment. Background Art

[0002] In the process of making beverages, the amount of raw materials such as syrup and jam needs to be added in a specific proportion to achieve a better taste. However, in the related art, workers usually add them by measuring using measuring containers. However, this method is greatly affected by manual readings, and errors are more likely to occur during the feeding process, which can easily affect the taste of the beverage. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a quantitative pressure pump, in which the storage cavity capacity of the elastic piston cylinder in the quantitative pressure pump is fixed, so that during the process of feeding the quantitative pressure pump, quantitative feeding can be achieved, and the phenomenon of affecting the taste of the beverage due to the indeterminate feeding can be avoided.

[0004] In a second aspect, the utility model also proposes a beverage device using the above-mentioned quantitative pressure pump.

[0005] According to the first aspect of the present invention, a quantitative pressure pump is provided, comprising:

[0006] Main housing with accommodating cavity

[0007] A quantitative component, comprising a pressure rod, an elastic piston cylinder and a discharge pipe, wherein a storage chamber is provided in the elastic piston cylinder, and a feeding terminal is provided at the lower end thereof, and a discharge terminal is provided at the lower side wall, the pressure rod is slidably connected to the upper part of the main shell and extends into the accommodating chamber, the elastic piston cylinder is arranged in the accommodating chamber, the upper end of the elastic piston cylinder is connected to the pressure rod, and the lower end is connected to the main shell, and the discharge pipe is connected to the discharge terminal;

[0008] Among them, a first stop ball is arranged in the feed end, and a second stop ball is arranged in the discharge pipe. When the pressure rod slides downward, the elastic piston cylinder is compressed, the first stop ball can block the feed end, and the discharge end is connected with the discharge pipe; when the pressure rod slides upward, the elastic piston cylinder is stretched, the second stop ball can block the discharge pipe, and the storage chamber is connected with the feed end.

[0009] The quantitative pressure pump provided in the first embodiment of the utility model has at least the following beneficial effects:

[0010] When in use, the pressure rod of the quantitative pressure pump is pressed down and the feeding end is placed in the container loaded with liquid raw materials such as syrup and jam, and then the pressure rod is pulled upwards. The rod drives the elastic piston cylinder to stretch, and a negative pressure is formed in the storage chamber in the elastic piston cylinder. At this time, the second stop ball blocks the discharge pipe, and the storage chamber is connected with the feeding end, so the liquid raw material is sucked into the storage chamber from the feeding port; when the pressure rod rises to the highest position, the storage chamber can be filled with liquid raw materials. At this time, the pressure rod is pressed down, and the elastic piston cylinder is compressed. At this time, the first stop ball can block the feeding end, and the discharge end is connected with the discharge pipe. Therefore, the liquid raw material can be squeezed in the storage chamber and flow out from the storage pipe. Since the storage chamber capacity of the elastic piston cylinder is fixed, quantitative feeding can be achieved in the process of feeding by the quantitative pressure pump, and the phenomenon of affecting the taste of the beverage due to inconsistent feeding can be avoided.

[0011] According to the metered pressure pump provided in the embodiment of the first aspect of the utility model, the upper end of the elastic piston cylinder is provided with a rim extending radially inward, the lower end of the pressure rod is connected to a mounting structure, the mounting structure defines a mounting groove matching the rim, and the rim is clamped and fixed to the mounting groove.

[0012] According to the metered pressure pump provided in the embodiment of the first aspect of the utility model, the mounting structure includes a first clamping plate and a second clamping plate, the first clamping plate is fixed to the lower end of the pressure rod, the second clamping plate is connected to the first clamping plate by a fastener, and the first clamping plate and the second clamping plate define the mounting groove.

[0013] According to the metered pressure pump provided in the embodiment of the first aspect of the utility model, the discharge pipe includes a first connecting section and a second connecting section, the lower end of the first connecting section is connected to the discharge end head, and the upper end is provided with a connecting seat, the second connecting section is threadedly connected to the connecting seat, an installation cavity is provided in the connecting seat, and the second baffle ball is arranged in the installation cavity.

[0014] According to the metered pressure pump provided by the first embodiment of the utility model, the lower end side wall of the main shell is provided with a threaded joint, the discharge end extends to the outside of the threaded joint, and the lower end of the first connecting section is connected to the threaded joint through a threaded member.

[0015] According to the metered pressure pump provided by the embodiment of the first aspect of the utility model, a feeding cavity is provided in the feeding end head, the first stop ball is arranged in the feeding cavity, a partition is provided between the feeding cavity and the storage cavity, an opening is provided on the partition, and a plurality of bosses are provided on the side of the opening facing the accommodating cavity, when the pressure rod slides upward, the elastic piston cylinder is stretched, the first stop ball abuts against the boss, and a gap is provided between the first stop ball and the opening.

[0016] According to the metered pressure pump provided by the first embodiment of the utility model, the upper end of the pressure rod is sleeved with a sliding cylinder, the upper end of the main shell is provided with a sliding sleeve, and the sliding cylinder is inserted into the sliding sleeve and can slide up and down.

[0017] According to the metered pressure pump provided by the first embodiment of the utility model, a spring is provided on the outer peripheral sleeve of the pressure rod, one end of the spring abuts against the top wall of the slide cylinder, and the other end abuts against the bottom wall of the slide sleeve.

[0018] According to the metered delivery pump provided by the first embodiment of the utility model, a circular delivery plate is provided on the top of the delivery rod, and the diameter of the delivery plate is larger than the diameter of the slide cylinder.

[0019] The beverage device provided according to the embodiment of the second aspect of the utility model comprises a connected end cover and a metering pressure pump as described in the embodiment of the first aspect of the utility model.

[0020] The beverage device provided in the second embodiment of the utility model has at least the following beneficial effects:

[0021] The storage chamber capacity of the elastic piston cylinder in the metering pump of the beverage equipment is fixed, so during the metering pump feeding process, quantitative feeding can be achieved, and the phenomenon of affecting the taste of the beverage due to inconsistent feeding can be avoided.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 An overall schematic diagram of a metered pressure pump provided by an embodiment of the first aspect of the utility model;

[0025] Figure 2 A cross-sectional view of a metered pressure pump provided by an embodiment of the first aspect of the utility model;

[0026] Figure 3 An exploded schematic diagram of a metering pressure pump provided in an embodiment of the first aspect of the utility model;

[0027] Figure 4 This is an overall schematic diagram of a metered pressure pump provided in an embodiment of the first aspect of the utility model installed on an end cover.

[0028] The figures are as follows:

[0029] Main housing 100; threaded joint 101; sliding sleeve 102;

[0030] Pressure rod 110; slide cylinder 111; spring 112; pressure plate 113;

[0031] Elastic piston cylinder 120; material storage chamber 121; material inlet end 122; material outlet end 123; surrounding edge 124; partition 125; boss 126;

[0032] Discharge pipe 130; first connection section 131; second connection section 132; connection seat 133; threaded member 134;

[0033] First block 140;

[0034] Second block 150;

[0035] Mounting structure 160; first clamping piece 161; second clamping piece 162;

[0036] End cap 170. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the utility model, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] In the process of making beverages, the amount of raw materials such as syrup and jam needs to be added in a specific proportion to achieve a better taste. However, in the related art, workers usually add them by measuring using measuring containers. However, this method is greatly affected by manual readings, and errors are more likely to occur during the feeding process, which can easily affect the taste of the beverage.

[0042] To solve this problem, the first embodiment of the utility model provides a metering pressure pump, in which the storage chamber 121 of the elastic piston cylinder 120 has a fixed capacity. Therefore, during the feeding process of the metering pressure pump, quantitative feeding can be achieved, and the phenomenon of affecting the taste of the beverage due to inconsistent feeding can be avoided. The specific structure and function of the metering pressure pump provided in the embodiment of the utility model will be further explained in combination with text and drawings.

[0043] Reference Figures 1 to 3 According to the first aspect of the present invention, the quantitative pressure pump provided by the embodiment includes: a main housing 100 and a quantitative component, the main housing 100 is cylindrical and has an accommodating chamber inside, the quantitative component includes a pressure rod 110, an elastic piston cylinder 120 and a discharge pipe 130, a storage chamber 121 is provided in the elastic piston cylinder 120, and a feeding terminal 122 is provided at the lower end thereof, and a discharge terminal 123 is provided at the lower side wall, the pressure rod 110 is slidably connected to the upper part of the main housing 100 and extends into the accommodating chamber, the elastic piston cylinder 120 is arranged in the accommodating chamber, the upper end of the elastic piston cylinder 120 is connected to the pressure rod 110, and the lower end is connected to the main housing 100, and the discharge pipe 130 is provided with a material storage chamber 121. The material pipe 130 is connected to the discharge end 123; wherein, a first blocking ball 140 is arranged in the feed end 122, and a second blocking ball 150 is arranged in the discharge pipe 130. When the pressure rod 110 slides downward, the pressure rod 110 presses down the elastic piston cylinder 120 to compress the elastic piston cylinder 120. At this time, the first blocking ball 140 can block the feed end 122, and the discharge end 123 is connected to the discharge pipe 130; when the pressure rod 110 slides upward, the pressure rod 110 pulls the elastic piston cylinder 120 upward to stretch the elastic piston cylinder 120. At this time, the second blocking ball 150 can block the discharge pipe 130, and the storage chamber 121 is connected to the feed end 122.

[0044] According to the metering pump provided by the first embodiment of the utility model, when in use, the pressure rod 110 of the metering pump is pressed down and the feed end 122 is placed in a container loaded with liquid raw materials such as syrup and jam, and then the pressure rod 110 is pulled upward, the rod drives the elastic piston cylinder 120 to stretch, and the storage chamber 121 in the elastic piston cylinder 120 forms a negative pressure. At this time, the second stop ball 150 blocks the discharge pipe 130, and the storage chamber 121 is connected with the feed end 122, so that the liquid raw material is sucked into the storage chamber 121 from the feed port; when the pressure rod 110 rises, the discharge pipe 130 is blocked by the second stop ball 150, and the storage chamber 121 is connected with the feed end 122. When it reaches the highest position, the storage chamber 121 can be filled with liquid raw materials. At this time, the pressure rod 110 is pressed down, and the elastic piston cylinder 120 is compressed. At this time, the first blocking ball 140 can block the feeding end 122, and the discharging end 123 is connected to the discharging pipe 130. Therefore, the liquid raw material can be squeezed in the storage chamber 121 and then flow out from the storage pipe. Since the capacity of the storage chamber 121 of the elastic piston cylinder 120 is fixed, quantitative feeding can be achieved during the feeding process of the quantitative pressure pump, and the phenomenon of affecting the taste of the beverage due to inconsistent feeding can be avoided.

[0045] It should be noted that the elastic piston cylinder 120 is made of elastic material (such as silicone, etc.) and can be compressed; in actual application, the capacity of the storage chamber 121 in the elastic piston cylinder 120 can be set according to actual usage requirements, and the capacity of the elastic piston cylinder 120 is not limited here.

[0046] Reference Figure 2 and Figure 3 According to the metered pressure pump provided by the embodiment of the first aspect of the utility model, the upper end of the elastic piston cylinder 120 is provided with a peripheral edge 124 extending radially inward, and the lower end of the pressure rod 110 is connected to a mounting structure 160, and the mounting structure 160 defines a mounting groove matching the shape of the peripheral edge 124, and the peripheral edge 124 is clamped and fixed in the mounting groove, and the connection method between the elastic piston cylinder 120 and the pressure rod 110 is stable and reliable.

[0047] Reference Figure 2 and Figure 3 According to the metered pressure pump provided by the embodiment of the first aspect of the utility model, the mounting structure 160 includes a first clamping piece 161 and a second clamping piece 162. The first clamping piece 161 is fixed to the lower end of the pressure rod 110, and the second clamping piece 162 is connected to the first clamping piece 161 through a fastener. The first clamping piece 161 and the second clamping piece 162 define a mounting groove. The mounting groove defined by the first clamping piece 161 and the second clamping piece 162 is used to fix the surrounding edge 124, and the connection method between the elastic piston cylinder 120 and the pressure rod 110 is stable and reliable.

[0048] It should be noted that the first clamping piece 161 and the second clamping piece 162 can be plastic parts, and the second clamping piece is provided with an integrally molded fastener. During installation, the second clamping piece 162 is first placed into the interior of the elastic piston cylinder 120 and the fastener on the second clamping piece protrudes from the upper end of the elastic piston. At this time, the second clamping piece 162 is in contact with the side of the surrounding edge 124 facing the storage cavity 121, and then the fastener protruding from the upper end of the elastic piston is connected to the first clamping piece 161 to complete the installation. The installation process is simple and convenient.

[0049] Reference Figures 1 to 3 According to the metered pressure pump provided in the embodiment of the first aspect of the utility model, the discharge pipe 130 includes a first connecting section 131 and a second connecting section 132. The lower end of the first connecting section 131 is connected to the discharge end 123, and a connecting seat 133 is provided at the upper end. The second connecting section 132 is threadedly connected to the connecting seat 133. The connection between the first connecting section 131 and the second connecting section 132 is stable and reliable.

[0050] Furthermore, a mounting cavity is provided in the connection seat 133 , and the second blocking ball 150 is disposed in the mounting cavity. The mounting method of the second blocking ball 150 is stable and reliable.

[0051] It should be noted that a limiting platform is provided at the threaded connection between the second connecting section 132 and the connecting seat 133. When the second stop ball 150 abuts against the limiting platform, there is a gap between the second stop ball 150 and the second connecting section 132. When the pressure rod 110 is pressed down, the elastic piston cylinder 120 is compressed, and the first stop ball 140 can block the feed end 122. At this time, the discharge end 123 is connected with the discharge pipe 130, and the liquid raw material in the storage cavity 121 can flow through the discharge pipe 130. When the liquid raw material passes through the installation cavity, it can push the second stop ball 150, which will make the second stop ball 150 abut against the limiting platform on the second connecting section 132. Under the support of the limiting platform, there is a gap between the second stop ball 150 and the second connecting section 132, and the liquid raw material can flow out of the second connecting section 132 smoothly.

[0052] It is understandable that when the installation cavity at the discharge pipe 130 is blocked, the second connecting section 132 can be rotated to separate the second connecting section 132 from the connecting seat 133 to clean the installation cavity, thereby facilitating maintenance during use.

[0053] Reference Figure 2 and Figure 3 According to the metered pressure pump provided by the embodiment of the first aspect of the utility model, a threaded joint 101 is provided on the lower end side wall of the main shell 100, and the discharge terminal 123 extends to the outside of the threaded joint 101. The lower end of the first connecting section 131 is connected to the threaded joint 101 through a threaded member 134, and the connection method between the discharge pipe 130 and the discharge terminal 123 is stable and reliable.

[0054] It is understandable that after the threaded member 134 is connected to the threaded joint 101, the discharge end 123 is connected to the discharge pipe 130; after use, the discharge pipe 130 can be disassembled after rotating the threaded member 134 to separate from the threaded joint 101 for easy cleaning.

[0055] Reference Figures 1 to 3 According to the quantitative pressure pump provided by the first embodiment of the utility model, a feeding cavity is provided in the feeding end head 122, and a first stop ball 140 is provided in the feeding cavity. A partition 125 is provided between the feeding cavity and the storage cavity 121, and an opening connecting the feeding cavity and the storage cavity 121 is provided on the partition 125. A plurality of bosses 126 are provided on the side of the opening facing the accommodating cavity. When the pressure rod 110 slides upward, the elastic piston cylinder 120 is stretched, and the first stop ball 140 abuts against the boss 126. There is a gap between the first stop ball 140 and the opening. When the pressure rod 110 is pulled upward, the elastic piston cylinder 120 is stretched, and the first stop ball 140 abuts against the boss 126. There is a gap between the first stop ball 140 and the opening. The piston cylinder 120 is stretched, and negative pressure is formed in the storage chamber 121 in the elastic piston cylinder 120. At this time, the second blocking ball 150 blocks the discharge pipe 130, and the storage chamber 121 is connected with the feed end 122. Under the action of negative pressure, the liquid raw material can be sucked into the storage chamber 121 from the feed end 122. When passing through the storage chamber 121, the liquid raw material can push the first blocking ball 140, causing the first blocking ball 140 to abut against the boss 126. Since there is a gap between the first blocking ball 140 and the boss 126, the liquid raw material can smoothly enter the storage chamber 121.

[0056] Reference Figures 1 to 3 According to the metered pressure pump provided by the first embodiment of the utility model, a slide cylinder 111 is provided on the upper end of the pressure rod 110, and a sleeve 102 is provided on the upper end of the main shell 100. The slide cylinder 111 is inserted into the sleeve 102 and can slide up and down. The slide cylinder 111 cooperates with the sleeve 102 to limit the sliding trajectory of the pressure rod 110, and can prevent the pressure rod 110 from getting stuck due to position deviation during the up and down sliding process.

[0057] Reference Figures 1 to 3 According to the metered pressure pump provided by the first embodiment of the utility model, a spring 112 is provided on the outer periphery of the pressure rod 110, one end of the spring 112 abuts against the top wall of the slide cylinder 111, and the other end abuts against the bottom wall of the sleeve 102. When the pressure rod 110 is pressed down, the spring 112 can play a buffering role to prevent the pressure rod 110 or the elastic piston cylinder 120 from being damaged due to excessive downward pressure; when the pressure rod 110 rises, the spring 112 can push the sleeve 102 so that the sleeve 102 can rise more smoothly.

[0058] Reference Figure 1According to the metered pressure pump provided by the first embodiment of the utility model, a circular pressure plate 113 is provided on the top of the pressure rod 110, and the diameter of the pressure plate 113 is larger than the diameter of the slide cylinder 111. When the pressure rod 110 is pulled up or pressed down, the operator's hand can grab or press against the pressure plate 113 with a larger diameter, which is convenient for the operator to operate.

[0059] Reference Figure 4 The beverage device provided according to the second embodiment of the utility model includes a connected end cover 170 and a metering pressure pump as in the first embodiment of the utility model.

[0060] According to the beverage equipment provided by the second embodiment of the utility model, the storage chamber 121 of the elastic piston cylinder 120 in the metering pressure pump of the beverage equipment has a fixed capacity. Therefore, during the metering pressure pump feeding process, quantitative feeding can be achieved, and the phenomenon of affecting the taste of the beverage due to inconsistent feeding can be avoided.

[0061] It should be noted that the metered pressure pump is fixed to the end cover 170 via fasteners.

[0062] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. The above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit it. The present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A quantitative pressure pump, characterized in that: include: A main housing having a receiving cavity; A quantitative component, comprising a pressure rod, an elastic piston cylinder and a discharge pipe, wherein a storage chamber is provided in the elastic piston cylinder, and a feeding terminal is provided at the lower end thereof, and a discharge terminal is provided at the lower side wall, the pressure rod is slidably connected to the upper part of the main shell and extends into the accommodating chamber, the elastic piston cylinder is arranged in the accommodating chamber, the upper end of the elastic piston cylinder is connected to the pressure rod, and the lower end is connected to the main shell, and the discharge pipe is connected to the discharge terminal; Among them, a first stop ball is arranged in the feed end, and a second stop ball is arranged in the discharge pipe. When the pressure rod slides downward, the elastic piston cylinder is compressed, the first stop ball can block the feed end, and the discharge end is connected with the discharge pipe; when the pressure rod slides upward, the elastic piston cylinder is stretched, the second stop ball can block the discharge pipe, and the storage chamber is connected with the feed end.

2. The metering pressure pump according to claim 1, characterized in that: The upper end of the elastic piston cylinder is provided with a peripheral edge extending radially inward, and the lower end of the pressure rod is connected to a mounting structure, which defines a mounting groove matching the peripheral edge, and the peripheral edge is clamped and fixed to the mounting groove.

3. The metering pressure pump according to claim 2, characterized in that: The mounting structure includes a first clamping piece and a second clamping piece, the first clamping piece is fixed to the lower end of the pressure rod, the second clamping piece is connected to the first clamping piece through a fastener, and the first clamping piece and the second clamping piece define the mounting groove.

4. The metering pressure pump according to claim 1, characterized in that: The discharge pipe includes a first connecting section and a second connecting section. The lower end of the first connecting section is connected to the discharge end head, and the upper end is provided with a connecting seat. The second connecting section is threadedly connected to the connecting seat. An installation cavity is provided in the connecting seat, and the second baffle ball is arranged in the installation cavity.

5. The metering pressure pump according to claim 4, characterized in that: A threaded joint is provided on the lower side wall of the main shell, the discharge end extends to the outside of the threaded joint, and the lower end of the first connecting section is connected to the threaded joint via a threaded member.

6. The metering pressure pump according to claim 1, characterized in that: A feeding cavity is provided in the feeding end head, the first blocking ball is provided in the feeding cavity, a partition is provided between the feeding cavity and the storage cavity, an opening is provided on the partition, and a plurality of bosses are provided on the side of the opening facing the accommodating cavity, when the pressure rod slides upward, the elastic piston cylinder is stretched, the first blocking ball abuts against the boss, and there is a gap between the first blocking ball and the opening.

7. The metering pressure pump according to claim 1, characterized in that: The upper end of the pressure rod is sleeved with a slide cylinder, the upper end of the main housing is provided with a slide sleeve, and the slide cylinder is inserted into the slide sleeve and can slide up and down.

8. The metering pressure pump according to claim 7, characterized in that: A spring is sleeved on the outer periphery of the pressure rod, one end of the spring abuts against the top wall of the slide cylinder, and the other end abuts against the bottom wall of the slide sleeve.

9. The metering pressure pump according to claim 7, characterized in that: A circular pressing plate is arranged on the top of the pressing rod, and the diameter of the pressing plate is larger than the diameter of the sliding cylinder.

10. A beverage device, characterized in that: The invention comprises a connected end cover and a metering pressure pump as claimed in any one of claims 1 to 9.

Images