Fluid cushioning device

Abstract

This utility model relates to the field of damper technology and discloses a fluid buffer device, including a main structure and a buffer structure. The main structure has a communicating cavity and an inlet and an outlet communicating with the communicating cavity, with the inlet and outlet positioned opposite each other. The buffer structure is disposed within the communicating cavity and has a buffer cavity and two openings communicating with the buffer cavity. One opening is connected to the inlet, and the other opening is connected to the outlet. The buffer structure is configured to be elastic. Under the action of medium pressure, the buffer structure is adapted to undergo elastic deformation to buffer the medium pressure. This utility model can provide all-round buffering of medium pressure in the radial, circumferential, and axial directions, so that the buffer structure can fully absorb the pulse brought by the medium pressure, thereby effectively improving the buffering effect of the buffer structure on the medium pressure and avoiding splashing when the medium flows out of the outlet.

Description

Technical Field

[0001] This utility model relates to the field of damper technology, specifically to fluid buffer devices. Background Technology

[0002] In the current food and beverage, pharmaceutical and other industries, pulse dampers are key equipment to ensure the accuracy of fluid delivery. In these scenarios, plunger pumps or diaphragm pumps are often used to deliver fluids, which can easily cause periodic pulses in the fluid. The industry's control standards for filling errors have been tightened to within 1%.

[0003] Currently, the mainstream single-diaphragm damper is still used due to its simple structure, but it is no longer suitable for the industry's upgrading needs. It relies on the diaphragm to expand and buffer in one direction, which cannot cover the multi-dimensional pulses in the pipeline direction and circumference. The pressure fluctuation attenuation effect is limited and it is difficult to meet the high-precision delivery requirements. Moreover, the diaphragm and the shell are mostly integrated structures, which are prone to fatigue and damage after frequent deformation. Replacement requires disassembling the entire set of equipment, resulting in high maintenance costs.

[0004] Furthermore, most single-diaphragm dampers lack a dedicated sealing structure, making them prone to dripping from the outlet after the conveying process stops, which does not meet hygiene standards. Moreover, their fixing method is mostly a bolt-through design, which cannot flexibly adjust the installation angle, resulting in poor adaptability in flexible production lines. At the same time, the industry's demand for low-cost, high-performance equipment is growing, and the technical shortcomings of existing equipment urgently need to be addressed. Utility Model Content

[0005] This invention provides a fluid buffer device to solve the problem that current dampers have poor buffering effect on fluids and are prone to dripping at the outlet.

[0006] In a first aspect, this utility model provides a fluid buffer device, comprising: The main structure has a communicating cavity and an inlet and an outlet communicating with the communicating cavity, the inlet and the outlet being arranged opposite to each other; A buffer structure is disposed within the communicating cavity. The buffer structure has a buffer cavity and two openings communicating with the buffer cavity. One opening is connected to the feed inlet, and the other opening is connected to the discharge outlet. The buffer structure is configured to be elastic. Under the action of medium pressure, the buffer structure is adapted to undergo elastic deformation to buffer the medium pressure.

[0007] Beneficial effects: The buffer structure installed on the main structure allows the medium to flow into the buffer chamber through the opening, enabling the buffer structure to undergo 360-degree circumferential expansion and deformation under the medium pressure. This provides all-round buffering of the medium pressure in the radial, circumferential, and axial directions, allowing the buffer structure to fully absorb the pulses brought by the medium pressure. This effectively improves the buffering effect of the buffer structure on the medium pressure and avoids splashing caused by excessive pulses when the medium flows out of the outlet.

[0008] In one optional embodiment, the main structure is provided with a snap-fit ​​protrusion at the inlet and the outlet respectively; The buffer structure is a buffer airbag, and the buffer airbag is provided with a snap-fit ​​groove at each of the two openings. Each of the snap-fit ​​grooves is adapted to snap-fit ​​with a snap-fit ​​protrusion.

[0009] Beneficial effects: By using snap-fit ​​protrusions on the main structure and snap-fit ​​grooves on the buffer structure, where the snap-fit ​​protrusions are respectively located at the inlet and outlet of the main structure, and the snap-fit ​​grooves are respectively located at the two openings of the buffer structure, the snap-fit ​​grooves on the buffer structure can engage with the snap-fit ​​protrusions on the main structure when the buffer structure is installed in the connecting cavity, thereby realizing the connection between the buffer structure and the main structure. At the same time, it also facilitates the installation and disassembly efficiency between the buffer structure and the main structure. In addition, the buffer structure in this embodiment is a buffer airbag.

[0010] In one alternative embodiment, a connecting structure is further included, the connecting structure comprising a first connector and a second connector, the first connector being adapted to connect to the feed inlet and the second connector being adapted to connect to the discharge outlet.

[0011] Beneficial effects: Through the connecting structure connected to the main structure, the connecting structure specifically includes a first connecting member and a second connecting member. In this embodiment, the first connecting member and the second connecting member are respectively a first pagoda connecting pipe and a second pagoda connecting pipe. The first connecting member is connected to the inlet, so that the inlet can be connected to the external pipeline, thereby allowing the medium to flow into the communicating cavity through the inlet. The second connecting member is connected to the outlet, so that the outlet can be connected to the external pipeline, thereby allowing the medium in the communicating cavity to flow into the external pipeline through the outlet, and realizing the circulation of the medium.

[0012] In one alternative embodiment, both the inlet and the outlet are configured as threaded ports; the first connector is adapted to be threadedly connected to the inlet, and the second connector is adapted to be threadedly connected to the outlet.

[0013] Beneficial effects: By configuring the inlet and outlet as threaded ports, the first connector can be threaded to the inlet and the second connector can be threaded to the outlet, thereby improving the efficiency of connection and disassembly between the first and second connectors and the main structure.

[0014] In one optional embodiment, when the first connector is connected to the feed inlet, the end of the first connector extending into the feed inlet is adapted to abut against the end of the buffer airbag to press the end of the buffer airbag against the snap-fit ​​protrusion. And / or, when the second connector is connected to the discharge port, the end of the second connector extending into the discharge port is adapted to abut against the end of the buffer airbag to press the end of the buffer airbag against the snap-fit ​​protrusion.

[0015] Beneficial effects: When the first connector is connected to the feed inlet, the end of the first connector extending into the feed inlet abuts against the end of the buffer airbag, thereby pressing the flange of the buffer airbag at the opening onto the snap-fit ​​protrusion, thus ensuring the seal between the connecting cavity and the buffer cavity; and when the second connector is connected to the discharge outlet, the end of the second connector extending into the discharge outlet abuts against the end of the buffer airbag, thereby pressing the flange of the buffer airbag at the opening onto the snap-fit ​​protrusion, thus ensuring the seal between the connecting cavity and the buffer cavity.

[0016] In one optional embodiment, any of the connectors has a communication channel communicating with the communication cavity, and the second connector further has a receiving cavity communicating with the communication cavity and the communication channel; it also includes a sealing member disposed within the receiving cavity, the sealing member being limited by the snap-fit ​​protrusion, the sealing member being adapted to seal the communication channel of the second connector under the action of gravity or external suction, and the sealing member being adapted to open the communication channel of the second connector under the action of medium pressure.

[0017] Beneficial effects: By setting each connector to have a connecting channel communicating with the connecting cavity, and setting the second connector to have a receiving cavity communicating with the connecting cavity and the connecting channel, the medium can flow into the connecting cavity through the connecting channel of the first connector and flow out of the connecting cavity through the connecting channel and the receiving cavity of the second connector. The sealing element set in the receiving cavity, which is a ball valve core in this embodiment, is limited by the snap-fit ​​protrusion when the sealing element is set in the receiving cavity. The sealing element can seal the connecting channel of the second connector under its own weight or external suction, and can open the connecting channel of the second connector under the action of medium pressure. In this way, the normal flow of the medium can be achieved through the sealing element. At the same time, when there is no medium flow, the sealing element can prevent leakage by sealing the connecting channel.

[0018] In one alternative embodiment, the main structure includes a first housing and a second housing, which are adapted to snap together to form the communicating cavity, the inlet, and the outlet.

[0019] Beneficial effects: By setting the main structure to include a first shell and a second shell, and the first shell and the second shell are connected by a snap-fit ​​connection, the first shell and the second shell can jointly form a connecting cavity, a feed inlet and a discharge outlet, thereby providing space for the installation of the buffer structure; in addition, since the first shell and the second shell are snap-fitted to form the main structure, it is also convenient to install and disassemble the buffer structure.

[0020] In one optional embodiment, any of the housings is provided with a vent hole that communicates with the communicating cavity. The vent hole is configured in an arrow shape, with the arrow pointing towards the discharge port.

[0021] Beneficial effects: By opening vent holes on the shell, when the first shell and the second shell together form a connecting cavity, the vent holes can communicate with the connecting cavity, so that air can flow into or out of the connecting cavity through the vent holes. In addition, when the buffer structure is deformed, the vent holes can ensure the normal flow of air and avoid the gas pressure in the connecting cavity from hindering the deformation of the buffer structure. Furthermore, the vent holes are configured in the shape of arrows, and the arrows of the vent holes point to the discharge port to clearly indicate the flow direction of the medium.

[0022] In one alternative embodiment, a fastening structure is further included, comprising a first fastener and a second fastener, wherein the first fastener is threadedly connected to the first connector and abuts against the main structure, and the second fastener is threadedly connected to the second connector and abuts against the main structure, so as to jointly fix the first housing and the second housing.

[0023] Beneficial effects: By setting a fastening structure between the connecting structure and the main structure, the fastening structure specifically includes a first fastener and a second fastener. In this embodiment, the first fastener and the second fastener are respectively a first nut and a second nut. After the connecting structure is connected to the main structure, the first fastener can be threadedly connected to the first connector and abut against the main structure, and the second fastener can be threadedly connected to the second connector and abut against the main structure. This allows the fastening structure to fix the connecting structure to the main structure and also improves the connection strength between the first shell and the second shell.

[0024] In one optional embodiment, an adapter is further included, the adapter being adapted to snap into the main structure, and the adapter having a connecting portion, the adapter being adapted to connect to the tea-making machine through the connecting portion.

[0025] Beneficial effects: Through the adapter connected to the main structure, the adapter in this embodiment is an adapter block. The adapter and the main structure can be snapped together, thereby installing the main structure on the adapter. At the same time, the adapter also has an adapter part, which in this embodiment is an adapter hole. The adapter can be connected to the tea-making machine through the adapter part, so that the adapter can install the main structure on the tea-making machine. Since the main structure and the adapter are snapped together, the installation and disassembly of the main structure and the adapter are convenient, thereby facilitating the installation and disassembly of the main structure and the tea-making machine. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the fluid buffer structure according to an embodiment of the present invention; Figure 2 This is a cross-sectional schematic diagram of the fluid buffer structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the connection of the adapter of the fluid buffer structure in an embodiment of this utility model.

[0028] Explanation of reference numerals in the attached figures: 1-Main structure; 11-Ventilation hole; 12-Inlet; 13-Outlet; 14-Snap-fit ​​protrusion; 15-Connecting cavity; 2-Buffer structure; 21-Snap-fit ​​groove; 22-Buffer cavity; 3-Connecting structure; 31-First connector; 32-Second connector; 321-Accommodating cavity; 4-Sealing element; 5-Fastening structure; 51-First fastener; 52-Second fastener; 6-Adapter. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] The following is combined with Figures 1 to 3 The following describes embodiments of the present invention.

[0031] According to embodiments of the present invention, in one aspect, a fluid buffer device is provided, such as... Figures 1 to 3 As shown, it includes a main structure and a buffer structure 2. The main structure has a connecting cavity 15 and an inlet 12 and an outlet 13 connected to the connecting cavity 15, with the inlet 12 and outlet 13 arranged opposite to each other. The buffer structure 2 is disposed in the connecting cavity 15 and has a buffer cavity 22 and two openings connected to the buffer cavity 22. One opening is connected to the inlet 12 and the other opening is connected to the outlet 13. The buffer structure 2 is configured to be elastic. Under the action of medium pressure, the buffer structure 2 is adapted to undergo elastic deformation to buffer the medium pressure.

[0032] The fluid buffer device described above utilizes a buffer structure 2 mounted on the main structure. The main structure has a communicating cavity 15 and an inlet 12 and an outlet 13 communicating with the communicating cavity 15. The inlet 12 and outlet 13 are positioned opposite each other to facilitate direct flow of the medium. The buffer structure 2 is located within the communicating cavity 15 and has a buffer cavity 22 and two openings communicating with the buffer cavity 22. One opening is connected to the inlet 12, and the other opening is connected to the outlet 13, allowing the medium to flow into the buffer cavity 22 through one opening and out of the buffer cavity 22 through the other opening. Specifically, the buffer structure 2 is configured to be elastic, so that when the medium flows into the buffer cavity 22 through the opening, the buffer structure 2 can undergo elastic deformation under the pressure of the medium and buffer the pressure of the medium. It should be noted that the elastic deformation of the buffer structure 2 occurs within the connecting cavity 15, so that the main structure limits the buffer structure 2 and prevents the buffer structure 2 from bursting under the pressure of the medium, which is beneficial to improving the service life of the buffer structure 2. In addition, the distance between the outer wall surface of the buffer structure 2 and the inner wall surface of the main structure needs to be greater than or equal to 3mm to ensure that the buffer structure 2 can undergo sufficient deformation within the connecting cavity 15.

[0033] In addition, since the buffer structure 2 is integrally formed into the buffer cavity 22, the buffer structure 2 can undergo 360-degree circumferential expansion and deformation under the action of medium pressure, and provide all-round buffering of the medium pressure in the radial, circumferential and axial directions. This allows the buffer structure 2 to fully absorb the pulse brought by the medium pressure, thereby effectively improving the buffering effect of the buffer structure 2 on the medium pressure and avoiding splashing when the medium flows out of the outlet 13.

[0034] In summary, by installing the buffer structure 2 on the main structure, the medium can flow into the buffer chamber 22 through the opening, thereby enabling the buffer structure 2 to undergo 360-degree circumferential expansion and deformation under the medium pressure, and providing all-round buffering of the medium pressure in the radial, circumferential and axial directions. This allows the buffer structure 2 to fully absorb the pulse brought by the medium pressure, thereby effectively improving the buffering effect of the buffer structure 2 on the medium pressure and avoiding splashing of the medium when it flows out of the outlet 13 due to excessive pulse.

[0035] In one embodiment, such as Figure 2 As shown, the main structure has a snap-fit ​​protrusion 14 at the feed inlet 12 and the discharge outlet 13 respectively; the buffer structure 2 is a buffer airbag, and the buffer airbag has a snap-fit ​​groove 21 at each of the two openings, and any snap-fit ​​groove 21 is suitable for snapping with a snap-fit ​​protrusion 14.

[0036] The fluid buffer device described above utilizes a snap-fit ​​protrusion 14 on the main structure and a snap-fit ​​groove 21 on the buffer structure 2. The snap-fit ​​protrusion 14 is located at the inlet 12 and outlet 13 of the main structure, while the snap-fit ​​groove 21 is located at the two openings of the buffer structure 2. When the buffer structure 2 is installed in the connecting cavity 15, the snap-fit ​​groove 21 on the buffer structure 2 can engage with the snap-fit ​​protrusion 14 on the main structure, thereby achieving the connection between the buffer structure 2 and the main structure. This also facilitates the installation and disassembly of the buffer structure 2 and the main structure. In this embodiment, the buffer structure 2 is a buffer airbag.

[0037] Specifically, the snap-fit ​​protrusion 14 is a snap-fit ​​protrusion formed on the main structure, and the snap-fit ​​groove 21 is formed by the flange of the buffer airbag at the opening. Both the snap-fit ​​protrusion and the flange are annular structures.

[0038] In one embodiment, such as Figures 1 to 3 As shown, it also includes a connecting structure 3, which includes a first connecting member 31 and a second connecting member 32. The first connecting member 31 is adapted to be connected to the feed inlet 12, and the second connecting member 32 is adapted to be connected to the discharge outlet 13.

[0039] The fluid buffer device described above is connected to the main structure via a connecting structure 3. The connecting structure 3 specifically includes a first connecting member 31 and a second connecting member 32. In this embodiment, the first connecting member 31 and the second connecting member 32 are respectively a first pagoda connecting pipe and a second pagoda connecting pipe. The first connecting member 31 is connected to the inlet 12, thereby enabling the inlet 12 to connect to an external pipeline, allowing the medium to flow into the connecting cavity 15 through the inlet 12. The second connecting member 32 is connected to the outlet 13, thereby enabling the outlet 13 to connect to an external pipeline, allowing the medium in the connecting cavity 15 to flow into the external pipeline through the outlet 13, thus realizing the flow of the medium.

[0040] In one embodiment, such as Figure 2 As shown, both the feed inlet 12 and the discharge outlet 13 are configured as threaded ports; the first connector 31 is adapted to be threadedly connected to the feed inlet 12, and the second connector 32 is adapted to be threadedly connected to the discharge outlet 13.

[0041] The fluid buffer device with the above structure, by configuring the inlet 12 and the outlet 13 as threaded ports, enables the first connector 31 to be threadedly connected to the inlet 12 and the second connector 32 to be threadedly connected to the outlet 13, thereby improving the efficiency of connection and disassembly between the first connector 31 and the second connector 32 and the main structure.

[0042] In one embodiment, such as Figure 2 As shown, when the first connector 31 is connected to the feed inlet 12, the end of the first connector 31 extending into the feed inlet 12 is adapted to abut against the end of the buffer airbag to press the end of the buffer airbag against the snap-fit ​​protrusion 14; and / or, when the second connector 32 is connected to the discharge outlet 13, the end of the second connector 32 extending into the discharge outlet 13 is adapted to abut against the end of the buffer airbag to press the end of the buffer airbag against the snap-fit ​​protrusion 14.

[0043] The fluid buffer device with the above structure, when the first connector 31 is connected to the inlet 12, makes the end of the first connector 31 extending into the inlet 12 abut against the end of the buffer airbag, so that the flange of the buffer airbag at the opening can be pressed against the snap-fit ​​protrusion by the first connector 31, thereby ensuring the seal between the connecting cavity 15 and the buffer cavity 22; and when the second connector 32 is connected to the outlet 13, makes the end of the second connector 32 extending into the outlet 13 abut against the end of the buffer airbag, so that the flange of the buffer airbag at the opening can be pressed against the snap-fit ​​protrusion by the second connector 32, thereby ensuring the seal between the connecting cavity 15 and the buffer cavity 22.

[0044] In one embodiment, such as Figure 2 As shown, any connector has a communication channel that communicates with the communication cavity 15. The second connector 32 also has a receiving cavity 321 that communicates with the communication cavity 15 and the communication channel. It also includes a sealing member 4, which is disposed in the receiving cavity 321. The sealing member 4 is limited by the snap-fit ​​protrusion 14. Under the action of gravity or external suction, the sealing member 4 is suitable for sealing the communication channel of the second connector 32. Under the action of medium pressure, the sealing member 4 is suitable for opening the communication channel of the second connector 32.

[0045] The fluid buffer device described above, by providing each connector with a communication channel communicating with the communication cavity 15 and by providing the second connector 32 with a receiving cavity 321 communicating with the communication cavity 15 and the communication channel, allows the medium to flow into the communication cavity 15 through the communication channel of the first connector 31 and out of the communication cavity 15 through the communication channel of the second connector 32 and the receiving cavity 321. The sealing element 4, which in this embodiment is a spherical valve core, is located within the receiving cavity 321. When the sealing element 4 is located within the receiving cavity 321, it is limited by the snap-fit ​​protrusion 14. The sealing element 4 can seal the communication channel of the second connector 32 under its own weight and can open the communication channel of the second connector 32 under the pressure of the medium. Thus, normal flow of the medium can be achieved through the sealing element 4. Simultaneously, when there is no medium flow, the sealing element 4 can prevent leakage by sealing the communication channel.

[0046] In other embodiments, the seal 4 can also seal the communication channel of the second connector 32 under external suction. Since the fluid buffer device needs to be installed on the tea-making machine, the tea-making machine usually uses a pump to extract the medium in the pipeline in order to speed up the flow rate of the medium. Therefore, when there is no medium flow, the seal 4 can also seal the communication channel of the second connector 32 under the external suction provided by the pump, so that the seal 4 can prevent leakage by sealing the communication channel.

[0047] In one embodiment, such as Figure 1 and Figure 2 As shown, the main structure includes a first shell and a second shell, which are adapted to be snapped together to form a connecting cavity 15, a feed inlet 12 and a discharge outlet 13.

[0048] The fluid buffer device with the above structure includes a first shell and a second shell as the main structure, which are connected by a snap-fit ​​connection. This allows the first shell and the second shell to jointly form a communicating cavity 15, an inlet 12, and an outlet 13, thereby providing space for the installation of the buffer structure 2. In addition, since the first shell and the second shell are snap-fitted to form the main structure, it is also convenient to install and disassemble the buffer structure 2.

[0049] In one embodiment, such as Figure 1 As shown, any housing has a vent hole 11 that communicates with the connecting cavity 15. The vent hole 11 is configured in an arrow shape, with the arrow pointing towards the discharge port 13.

[0050] The fluid buffer device with the above structure, through the vent hole 11 opened on the shell, can communicate with the connecting cavity 15 when the first shell and the second shell together form the connecting cavity 15, so that air can flow into or out of the connecting cavity 15 through the vent hole 11. In addition, when the buffer structure 2 is deformed, the vent hole 11 can ensure the normal flow of air and avoid the gas pressure in the connecting cavity 15 from hindering the deformation of the buffer structure 2. In addition, the vent hole 11 is configured in the shape of an arrow, and the arrow of the vent hole 11 points to the discharge port 13 to clearly indicate the flow direction of the medium.

[0051] In one embodiment, such as Figure 1 and Figure 2 As shown, it also includes a fastening structure 5, which includes a first fastener 51 and a second fastener 52. The first fastener 51 is threadedly connected to the first connector 31 and abuts against the main structure. The second fastener 52 is threadedly connected to the second connector 32 and abuts against the main structure, so as to jointly fix the first housing and the second housing.

[0052] The fluid buffer device described above uses a fastening structure 5 disposed between the connecting structure 3 and the main structure. The fastening structure 5 specifically includes a first fastener 51 and a second fastener 52. In this embodiment, the first fastener 51 and the second fastener 52 are respectively a first nut and a second nut. After the connecting structure 3 is connected to the main structure, the first fastener 51 can be threadedly connected to the first connecting member 31 and abut against the main structure, and the second fastener 52 can be threadedly connected to the second connecting member 32 and abut against the main structure. This allows the fastening structure 5 to fix the connecting structure 3 to the main structure and also improves the connection strength between the first housing and the second housing.

[0053] In one embodiment, such as Figures 1 to 3 As shown, it also includes an adapter 6, which is adapted to be snapped into the main structure, and the adapter 6 has an adapter part, which is adapted to be connected to the tea making machine through the adapter part.

[0054] The fluid buffer device described above uses a connector 6 connected to the main structure. In this embodiment, the connector 6 is a connector block. The connector 6 and the main structure can be snapped together, thereby mounting the main structure onto the connector 6. At the same time, the connector 6 also has a connector portion, which is a connector hole in this embodiment. The connector 6 can be connected to the tea-making machine through the connector portion, so that the main structure can be mounted on the tea-making machine. Since the main structure and the connector 6 are snapped together, the installation and disassembly of the main structure and the connector 6 are facilitated, thereby facilitating the installation and disassembly of the main structure and the tea-making machine.

[0055] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A fluid buffer device, characterized in that, include: The main structure has a communicating cavity (15) and an inlet (12) and an outlet (13) communicating with the communicating cavity (15), the inlet (12) and the outlet (13) being arranged opposite to each other; A buffer structure (2) is disposed in the communicating cavity (15). The buffer structure (2) has a buffer cavity (22) and two openings connected to the buffer cavity (22). One of the openings is connected to the feed port (12), and the other opening is connected to the discharge port (13). The buffer structure (2) is configured to be elastic. Under the action of medium pressure, the buffer structure (2) is adapted to undergo elastic deformation to buffer the medium pressure.

2. The fluid buffer device according to claim 1, characterized in that, The main structure is provided with a snap-fit ​​protrusion (14) at the feed inlet (12) and the discharge outlet (13); The buffer structure (2) is a buffer airbag, and the buffer airbag is provided with a snap-fit ​​groove (21) at each of the two openings. Each snap-fit ​​groove (21) is adapted to snap-fit ​​with a snap-fit ​​protrusion (14).

3. The fluid buffer device according to claim 2, characterized in that, It also includes a connecting structure (3), which includes a first connector (31) and a second connector (32), the first connector (31) being adapted to connect to the feed inlet (12), and the second connector (32) being adapted to connect to the discharge outlet (13).

4. The fluid buffer device according to claim 3, characterized in that, Both the feed inlet (12) and the discharge outlet (13) are configured as threaded ports; the first connector (31) is adapted to be threadedly connected to the feed inlet (12), and the second connector (32) is adapted to be threadedly connected to the discharge outlet (13).

5. The fluid buffer device according to claim 4, characterized in that, When the first connector (31) is connected to the feed port (12), the end of the first connector (31) extending into the feed port (12) is adapted to abut against the end of the buffer airbag to press the end of the buffer airbag against the snap-fit ​​protrusion (14). And / or, when the second connector (32) is connected to the outlet (13), the end of the second connector (32) extending into the outlet (13) is adapted to abut against the end of the buffer airbag to press the end of the buffer airbag against the snap-fit ​​protrusion (14).

6. The fluid buffer device according to claim 5, characterized in that, Each of the connectors has a communication channel communicating with the communication cavity (15), and the second connector (32) also has a receiving cavity (321) communicating with the communication cavity (15) and the communication channel; it also includes a sealing member (4), which is disposed in the receiving cavity (321), and the sealing member (4) is limited by the snap-fit ​​protrusion (14). Under the action of gravity or external suction, the sealing member (4) is adapted to seal the communication channel of the second connector (32), and under the action of medium pressure, the sealing member (4) is adapted to open the communication channel of the second connector (32).

7. The fluid buffer device according to any one of claims 3-6, characterized in that, The main structure includes a first shell and a second shell, which are adapted to be snapped together to form the communicating cavity (15), the feed inlet (12) and the discharge outlet (13).

8. The fluid buffer device according to claim 7, characterized in that, Each of the housings is provided with a vent (11) that communicates with the communicating cavity (15). The vent (11) is configured in the shape of an arrow, with the arrow of the vent (11) pointing to the discharge port (13).

9. The fluid buffer device according to claim 8, characterized in that, It also includes a fastening structure (5), which includes a first fastener (51) and a second fastener (52). The first fastener (51) is threadedly connected to the first connector (31) and abuts against the main structure. The second fastener (52) is threadedly connected to the second connector (32) and abuts against the main structure, so as to jointly fix the first housing and the second housing.

10. The fluid buffer device according to claim 1, characterized in that, It also includes an adapter (6), which is adapted to be snapped into the main structure, and the adapter (6) has a connecting part, which is adapted to be connected to the tea-making machine through the connecting part.

Images