Fluid chamber for diaphragm pump

Abstract

The utility model relates to a fluid chamber for a diaphragm pump, which comprises a fluid chamber body and a top cover mounted on the fluid chamber body. A water outlet; the buffer cavity is respectively communicated with the high-pressure cavity and the water outlet; the partition wall is arranged in the buffer cavity and divides the buffer cavity into a first buffer cavity and a second buffer cavity which are respectively communicated with the water outlet; the first water outlet hole is formed in one side of the partition wall and is used for communicating the first buffer cavity with the high-pressure cavity; the second water outlet hole is formed in the other side of the partition wall and is used for communicating the second buffer cavity with the high-pressure cavity; the first fluid which enters the first buffering cavity through the first water outlet hole and flows to the water outlet and the second fluid which enters the second buffering cavity through the second water outlet hole and flows to the water outlet have different flow directions, and the fluid pulse can be effectively reduced.

Description

Fluid chamber for diaphragm pumps Technical Field

[0001] This utility model relates to the field of diaphragm pump technology, and in particular to a fluid chamber for a diaphragm pump. Background Technology

[0002] Currently, diaphragm pumps are mainly used in reverse osmosis systems or other systems requiring pressurization; they are a type of diaphragm positive displacement pump. The working principle of diaphragm pumps results in a certain periodicity in the discharged fluid, leading to noticeable fluid pulsations during subsequent fluid transport, which adversely affects fluid delivery. Therefore, there is an urgent need for a novel fluid chamber structure for diaphragm pumps and its application in diaphragm pump products to reduce fluid pulsations during fluid transport. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems by providing a fluid chamber for a diaphragm pump.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] A fluid chamber for a diaphragm pump includes a fluid chamber body and a top cover mounted on the fluid chamber body, the fluid chamber body having:

[0006] The inlet is connected to the low-pressure chamber of the diaphragm pump;

[0007] Water outlet;

[0008] The buffer chamber, located between the fluid chamber body and the top cover, is connected to the high-pressure chamber and the outlet of the diaphragm pump, respectively.

[0009] A partition wall is installed inside the buffer chamber, dividing the buffer chamber into a first buffer chamber and a second buffer chamber, which are respectively connected to the water outlet.

[0010] The first water outlet is located on one side of the partition wall, enabling the connection between the first buffer chamber and the high-pressure chamber;

[0011] The second water outlet is located on the other side of the partition wall, enabling the connection between the second buffer chamber and the high-pressure chamber;

[0012] The first fluid that enters the first buffer chamber through the first outlet and flows to the outlet has a different flow direction than the second fluid that enters the second buffer chamber through the second outlet and flows to the outlet.

[0013] Preferably, the first fluid flows to the outlet in a different direction than the second fluid flows to the outlet.

[0014] Preferably, the flow direction of the first fluid when it flows to the outlet is opposite or substantially opposite to the flow direction of the second fluid when it flows to the outlet.

[0015] Preferably, the flow distance of the first fluid from the first outlet hole to the outlet is less than the flow distance of the second fluid from the second outlet hole to the outlet; and the single flow rate of the first outlet hole is less than the single flow rate of the second outlet hole.

[0016] Preferably, the flow path of the first fluid from the first outlet hole to the outlet is arc-shaped or S-shaped or includes an arc segment, and the flow path of the second fluid from the second outlet hole to the outlet is arc-shaped or S-shaped or includes an arc segment.

[0017] Preferably, the fluid chamber body further comprises:

[0018] The sidewall is basically in the shape of a ring, and the inlet end of the water inlet and the outlet end of the water outlet are both located on this sidewall.

[0019] The middle partition is integrally formed on the inner side wall, dividing the fluid chamber body into upper and lower parts; the upper part is used to form the buffer chamber, and the lower part is used to cooperate with the diaphragm chamber of the diaphragm pump to form the low-pressure chamber and the high-pressure chamber;

[0020] The partition wall, the first water outlet, and the second water outlet are all located on the middle partition.

[0021] Preferably, the fluid chamber further includes:

[0022] Vibration damping pads are installed on the fluid chamber body;

[0023] The top cover is connected to the fluid chamber body to press the shock-absorbing pad onto the fluid chamber body and seal it in contact with the partition wall, thereby forming the buffer cavity between the fluid chamber body and the shock-absorbing pad.

[0024] Preferably, the partition wall comprises:

[0025] The first wall is located inside the buffer cavity, between the first water outlet and the second water outlet, and its first end is connected to the side wall of the fluid chamber body.

[0026] The second wall is ring-shaped, with one side connected to the second end of the first wall and the other side having a gap between it and the side wall of the fluid chamber body for fluid to pass through.

[0027] Preferably, the fluid chamber body further comprises:

[0028] The pressure relief chamber is located on the inner side of the second wall;

[0029] The high-pressure chamber vent hole is used to connect the pressure relief chamber to the high-pressure chamber;

[0030] The low-pressure chamber vent is used to connect the pressure relief chamber to the low-pressure chamber;

[0031] The pressure relief chamber is further provided with a pressure relief structure, which has a first state and a second state. In the first state, the pressure relief structure closes the high-pressure chamber vent hole, blocking the communication between the pressure relief chamber and the high-pressure chamber. In the second state, the pressure relief structure is at least partially disconnected from the high-pressure chamber vent hole, so that the pressure relief chamber and the high-pressure chamber are in communication.

[0032] Preferably, the pressure relief structure includes:

[0033] The protrusion is formed at the outlet end of the high-pressure chamber vent hole and is arranged around the high-pressure chamber vent hole;

[0034] A pressure regulating valve plate is disposed in the pressure relief chamber, and the top cover presses the edge part of the pressure regulating valve plate into the pressure relief chamber to achieve a seal of the pressure relief chamber;

[0035] The elastic element has its two ends abutting against the top cover and the pressure regulating valve plate, respectively, and is arranged coaxially or substantially coaxially with the high-pressure chamber vent hole;

[0036] In the first state, the pressure regulating valve plate is pressed against the end face of the protrusion under the action of the elastic element to close the high pressure chamber vent hole; in the second state, the pressure regulating valve plate undergoes partial deformation, forming a gap between the pressure regulating valve plate and the protrusion, so that the fluid in the high pressure chamber can enter the pressure relief chamber through the high pressure chamber vent hole and flow back to the low pressure chamber through the low pressure chamber vent hole.

[0037] The beneficial effects of this utility model are as follows:

[0038] 1. This utility model features a partition wall within the buffer chamber, dividing it into a first buffer chamber and a second buffer chamber. A first water outlet and a second water outlet are respectively located on opposite sides of the partition wall. The first fluid entering the first buffer chamber through the first water outlet and flowing to the outlet has a different flow direction than the second fluid entering the second buffer chamber through the second water outlet and flowing to the outlet. Thus, the first and second fluids converge at the outlet and collide, effectively canceling out energy flow and reducing fluid pulsation. Therefore, when the fluid chamber of this utility model is used in diaphragm pump products, it can effectively reduce fluid pulsation during fluid transport.

[0039] 2. The flow distance of the first fluid from the first outlet to the outlet is less than the flow distance of the second fluid from the second outlet to the outlet, and the single flow rate of the first outlet is less than the single flow rate of the second outlet; the energy of the first fluid flowing to the outlet is matched with that of the second fluid as much as possible to better reduce fluid pulse.

[0040] 3. A partition is provided on the inner side of the annular sidewall of the fluid chamber body to divide the fluid chamber body into upper and lower parts; the upper part is used to form the buffer chamber, and the lower part is used to cooperate with the diaphragm chamber to form the low-pressure chamber and the high-pressure chamber; in this way, the upper half of the fluid chamber body serves as a buffer chamber, which greatly increases the volume of the buffer chamber, improves the buffering capacity, and can further reduce fluid pulses.

[0041] 4. The damping pad is pressed tightly onto the fluid chamber body by the top cover and the damping pad is sealed to the partition wall, thereby forming the buffer cavity between the fluid chamber body and the damping pad; in this way, the fluid entering the buffer cavity will impact the top damping pad, thereby reducing fluid pulse.

[0042] 5. The fluid chamber body also has a pressure relief chamber, a high-pressure chamber drain hole connecting the high-pressure chamber and the pressure relief chamber, and a low-pressure chamber drain hole connecting the low-pressure chamber and the pressure relief chamber. The pressure relief chamber is further equipped with a pressure relief structure, which has a first state and a second state. In the first state, the pressure relief structure closes the high-pressure chamber drain hole, blocking the communication between the pressure relief chamber and the high-pressure chamber. In the second state, the pressure relief structure at least partially disengages from the high-pressure chamber drain hole, allowing the pressure relief chamber to communicate with the high-pressure chamber. Thus, when the pressure in the high-pressure chamber is too high, the pressure relief structure enters the second state under pressure, and the fluid in the high-pressure chamber enters the pressure relief chamber through the high-pressure chamber drain hole, then flows back to the low-pressure chamber through the low-pressure chamber drain hole, thereby further reducing the water flow pulse in the buffer chamber. Attached Figure Description

[0043] Figure 1 is an exploded view of the fluid chamber for the diaphragm pump of this utility model.

[0044] Figure 2 is a perspective view of the fluid chamber body of this utility model.

[0045] Figure 3 is an enlarged view of part A in Figure 2.

[0046] Figure 4 is a perspective view of the fluid chamber body of this utility model.

[0047] Figure 5 is a schematic diagram of the pressure relief structure of this utility model.

[0048] Figure 6 is a schematic diagram of the pressure relief structure of this utility model.

[0049] Figure 7 is a schematic diagram of the structure of the top cover of this utility model.

[0050] Figure 8 is a perspective view of the first shock-absorbing pad of this utility model.

[0051] Figure 9 is an exploded view of a diaphragm pump with the fluid chamber of this invention.

[0052] Figure 10 is a partial structural cross-sectional view of a diaphragm pump having the fluid chamber of this invention.

[0053] Figure 11 is a schematic diagram of the structure of Figure 10 after removing the top cover and shock-absorbing pad.

[0054] Figure 12 is a perspective view of the diaphragm chamber of the diaphragm pump having the fluid chamber of this utility model.

[0055] Figure 13 is a perspective view of the diaphragm chamber of the diaphragm pump having the fluid chamber of this utility model.

[0056] Figure 14 is a cross-sectional view of the diaphragm chamber of the diaphragm pump having the fluid chamber of this invention.

[0057] Figure 15 is a cross-sectional view of Figure 14 after removing the intake valve and discharge valve.

[0058] Figure 16 is a perspective view of the diaphragm of the diaphragm pump having the fluid chamber of this invention.

[0059] Figure 17 is a perspective view of the support of the diaphragm pump with the fluid chamber of this utility model.

[0060] Figure 18 is a schematic diagram of the water flow pulse curves of the diaphragm pump of this utility model and the existing conventional diaphragm pump.

[0061] The markings in the image are as follows:

[0062] Fluid chamber 1;

[0063] Fluid chamber body 10; limiting groove 10a; limiting boss 10b; dovetail groove 10c; step portion 10d; annular pressure ring 10e; side wall 100a; middle partition portion 100b; water inlet 101; water outlet 102; buffer chamber 103; first buffer chamber 1031; second buffer chamber 1032; partition wall 104; first wall 1041; second wall 1042; limiting step 1043; first water outlet 105; second water outlet 106; pressure relief chamber 107; high pressure chamber vent 108; low pressure chamber vent 109;

[0064] Vibration damping pad 11; First vibration damping pad 111; Protruding rib 1111; Groove 1112; Second vibration damping pad 112;

[0065] Top cover 12; dovetail boss 121; first annular wall 122; second annular wall 123

[0066] Protruding part 13; convex part 131; pressure rib 132;

[0067] Pressure regulating valve plate 14;

[0068] Elastic element 15;

[0069] Spring seat 16;

[0070] Diaphragm chamber 2;

[0071] Diaphragm chamber body 21; first chamber 211; sealing ring 212; second chamber 213; water suction hole 214; drain hole 215; discharge valve mounting hole 216; suction valve mounting hole 217; limiting surface 218; rib 219; suction valve 22; discharge valve 23;

[0072] Membrane 3;

[0073] Bracket 4;

[0074] Swinging component 5;

[0075] Low-pressure chamber 6;

[0076] High-pressure chamber 7;

[0077] Pressure chamber 8. Detailed Implementation

[0078] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are exemplary embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0079] A diaphragm pump is a type of positive displacement pump that relies on the reciprocating movement of a diaphragm to change the volume of the working chamber, thereby drawing in and discharging fluid. Specifically, the up-and-down movement of a oscillating component causes the valves in the diaphragm chamber to open and close repeatedly, creating a change in volume difference. As the oscillating component moves, fluid flows from the low-pressure chamber to the booster chamber, then from the booster chamber to the high-pressure chamber, and finally exits from the high-pressure chamber. This cyclical movement causes fluid to intermittently (microscopically speaking) enter the high-pressure chamber, resulting in pulses within the high-pressure chamber. Since the high-pressure chamber is connected to the outlet, these pulses are also transmitted to the outlet, negatively impacting fluid delivery.

[0080] This embodiment provides a fluid chamber for a diaphragm pump, including a fluid chamber body and a top cover mounted on the fluid chamber body. The fluid chamber body has: an inlet communicating with the low-pressure chamber of the diaphragm pump; an outlet; a buffer chamber located between the fluid chamber body and the top cover, communicating with the high-pressure chamber and the outlet of the diaphragm pump respectively; a partition wall disposed within the buffer chamber, dividing the buffer chamber into a first buffer chamber and a second buffer chamber communicating with the outlet respectively; a first outlet hole located on one side of the partition wall, enabling communication between the first buffer chamber and the high-pressure chamber; and a second outlet hole located on the other side of the partition wall, enabling communication between the second buffer chamber and the high-pressure chamber. The first fluid entering the first buffer chamber through the first outlet hole and flowing to the outlet has a different flow direction than the second fluid entering the second buffer chamber through the second outlet hole and flowing to the outlet. Thus, the first and second fluids converge at the outlet, and their different flow directions cause them to collide with each other, achieving an energy cancellation effect, thereby reducing fluid pulsation. Therefore, when the fluid chamber of this embodiment is used in a diaphragm pump product, it can effectively reduce fluid pulsation during fluid delivery.

[0081] The technical solution of this embodiment will be described in detail below with reference to the accompanying drawings.

[0082] As illustrated in Figures 1-8, a fluid chamber for a diaphragm pump includes a fluid chamber body 10, a shock-absorbing pad 11, and a top cover 12. The top cover 12 is connected to the fluid chamber body 10 (it can be connected by screws or ultrasonic welding; this embodiment does not limit this) to press the shock-absorbing pad 11 onto the fluid chamber body 10, thereby forming a buffer cavity 103 between the fluid chamber body 10 and the shock-absorbing pad 11. As shown in Figure 1, in some practical applications, the shock-absorbing pad 11 includes a first shock-absorbing pad 111 and a second shock-absorbing pad 112. The first shock-absorbing pad 111 is in sealed contact with the fluid chamber body 10 to achieve a seal in the buffer cavity 103 (preventing leakage). The second shock-absorbing pad 112 is located between the first shock-absorbing pad 111 and the top cover 12. Fluid entering the buffer cavity 103 impacts the first shock-absorbing pad 111 and the second shock-absorbing pad 112, thereby reducing fluid pulsation. In some other practical applications, a gap is left between the second damping pad 112 and the top cover 12 to allow for the deformation of the second damping pad 112. As shown in Figure 2, in some practical applications, the top of the fluid chamber body 10 is provided with a limiting groove 10a and a limiting boss 10b located next to the limiting groove 10a; as shown in Figure 8, the first damping pad 111 is provided with a rib 1111 that matches the limiting groove 10a and a groove 1112 that matches the limiting boss 10b; the rib 1111 is embedded in the limiting groove 10a, and the limiting boss 10b is embedded in the groove 1112. As shown in Figures 2 and 7, in some other practical applications, for ease of installation, the top of the fluid chamber body 10 is provided with several dovetail grooves 10c, and the top cover 12 is provided with several dovetail bosses 121 that are adapted to the dovetail grooves 10c. After installation, the dovetail bosses 121 are embedded in the dovetail grooves 10c. As mentioned above, by setting the shock-absorbing pad 11, the buffer chamber 103 is sealed on the one hand, and the fluid entering the buffer chamber 103 will impact the top shock-absorbing pad 11, thereby reducing fluid pulsation. Therefore, for those skilled in the art, in some cases (e.g., when the fluid pulsation is not high), the shock-absorbing pad 11 may not be set, and only a sealing ring may be set between the fluid chamber body 10 and the top cover 12, thereby forming a sealed buffer chamber 103 between the fluid chamber body 10 and the top cover 12 to prevent leakage of the buffer chamber. This embodiment does not limit this.

[0083] As shown in Figures 1-4, the fluid chamber body 10 has:

[0084] The sidewall 100a is basically in the form of a ring structure. It serves as the basic frame structure of the fluid chamber body 10 and belongs to the conventional or existing technology in the field of diaphragm pump technology. It will not be described in detail.

[0085] The partition 100b is integrally formed on the inner side of the side wall 100a, dividing the fluid chamber body 10 into upper and lower parts; the upper part is used to form the buffer chamber 103, and the lower part is used to cooperate with the diaphragm chamber 2 of the diaphragm pump to form the low-pressure chamber 6 and the high-pressure chamber 7 of the diaphragm pump (see Figures 9-11); in this way, the upper half of the fluid chamber body 10 serves as a buffer chamber, which greatly increases the volume of the buffer chamber, improves the buffering capacity, and can reduce fluid pulsation;

[0086] The inlet 101 is connected to the low-pressure chamber 6, and its inlet end is located on the side wall 100a. This is a conventional or existing technology in the field of diaphragm pump technology, and will not be described in detail.

[0087] The outlet 102 is used to connect to external water-using equipment. Its outlet end is located on the side wall 100a. It belongs to conventional or existing technology in the field of diaphragm pump technology and will not be described in detail.

[0088] The buffer chamber 103 is connected to the high-pressure chamber 7 and the water outlet 102 respectively. In this embodiment, the buffer chamber 103 is formed by the side wall 100a, the middle partition 100b and the shock-absorbing pad 11. When the shock-absorbing pad 11 is not provided, the buffer chamber 103 is formed by the side wall 100a, the middle partition 100b and the top cover 12.

[0089] A partition wall 104 is disposed within the buffer cavity 103, dividing the buffer cavity 103 into a first buffer cavity 1031 and a second buffer cavity 1032, which are respectively connected to the water outlet 102. In this embodiment, the partition wall 104 is disposed on the intermediate partition 100b and is in sealed contact with the shock-absorbing pad 11 (in sealed contact with the first shock-absorbing pad 111). When the shock-absorbing pad 11 is not disposed, the partition wall 104 is in direct contact with the top cover 12 or in sealed contact with the top cover 12 through a rubber pad. As long as the separation function can be achieved, the specific method is not limited.

[0090] The first water outlet 105 is located on one side of the partition wall 104, enabling communication between the first buffer chamber 1031 and the high-pressure chamber 7; in this embodiment, the first water outlet 105 is disposed on the partition 100b.

[0091] The second water outlet 106 is located on the other side of the partition wall 104, enabling communication between the second buffer chamber 1032 and the high-pressure chamber 7; in this embodiment, the second water outlet 106 is disposed on the partition 100b.

[0092] By setting a partition wall 104 and placing the first water outlet 105 and the second water outlet 106 on opposite sides of the partition wall 104, the first fluid entering the first buffer chamber 1031 through the first water outlet 105 and flowing to the water outlet 102 has a different flow direction than the second fluid entering the second buffer chamber 1032 through the second water outlet 106 and flowing to the water outlet 102. In some practical applications, the first fluid and the second fluid have different flow directions when flowing to the water outlet 102. In other practical applications, the flow direction of the first fluid when flowing to the water outlet 102 is opposite or substantially opposite to that of the second fluid when flowing to the water outlet 102, and the fluid pulse can be better reduced through mutual collision. The aforementioned first fluid is the fluid that enters the first buffer chamber 1031 through the first water outlet 105 and flows to the water outlet 102, and the aforementioned second fluid is the fluid that enters the second buffer chamber 1032 through the second water outlet 106 and flows to the water outlet 102.

[0093] As shown in Figure 2, in some practical applications, the flow distance of the first fluid from the first outlet 105 to the outlet 102 is less than the flow distance of the second fluid from the second outlet 106 to the outlet 102. Because the flow distance of the second fluid from the second outlet 106 to the outlet 102 is longer, the energy loss during the flow is also greater. If the single-pass output of the first outlet 105 and the second outlet 106 is smaller (due to the working principle of the diaphragm pump, the water output from the high-pressure chamber is intermittent from a microscopic perspective, with a single...), the energy loss during the flow is also greater. The outflow volume refers to the amount of water entering the buffer chamber from the high-pressure chamber each time. If the outflow volume is the same, the energy of the second fluid reaching the outlet 102 is less than the energy of the first fluid reaching the outlet 102. The energy canceled out by the collision between the first fluid and the second fluid is limited. Therefore, in this embodiment, the single outflow volume of the first outlet 105 is less than the single outflow volume of the second outlet 106, so as to match the energy of the first fluid flowing to the outlet 102 with the energy of the second fluid flowing to the outlet 102 as much as possible, and better reduce fluid pulses. Within the scope of options available to those skilled in the art, in order to achieve a single water output volume of the first water outlet 105 being less than that of the second water outlet 106, the following methods can be selected: designing the number of first water outlets 105 to be less than the number of second water outlets 106 (provided that the first water outlet and the second water outlet are the same size); or designing the size of the first water outlet 105 to be less than the size of the second water outlet 106 (provided that the number of first water outlets and the second water outlet are the same); of course, this embodiment does not limit this, as long as it can achieve a single water output volume of the first water outlet 105 being less than that of the second water outlet 106.

[0094] As shown in Figure 2, in some practical applications, the flow path of the first fluid from the first outlet 105 to the outlet 102 is arc-shaped or S-shaped or includes an arc segment, and the flow path of the second fluid from the second outlet 106 to the outlet 102 is arc-shaped or S-shaped or includes an arc segment; thus, the fluid will also be subject to certain resistance during the flow process, resulting in energy loss, thereby reducing fluid pulse.

[0095] As shown in Figures 2 and 3, in some practical applications, the partition wall 104 includes:

[0096] The first wall 1041 is basically flat and is located in the buffer cavity 103, between the first water outlet 105 and the second water outlet 106. Its first end is connected to the side wall 100a of the fluid chamber body 10.

[0097] The second wall 1042 is generally annular, with one side connected to the second end of the first wall 1041, and the other side having a gap between it and the side wall 100a of the fluid chamber body 10 for fluid to pass through.

[0098] Since the first water outlet 105 and the second water outlet 106 are located on both sides of the first wall 1041, and the second wall 1042 is annular, the flow channels of the first fluid in the first buffer chamber 1031 and the flow channels of the second fluid in the second buffer chamber 1032 gradually narrow (gradually narrowing along the fluid flow direction). This further increases the energy loss of the fluid during flow, thereby reducing fluid pulsation. Specifically, the annular second wall 1042 is used to narrow the flow channels and also to form a pressure relief chamber with a pressure relief structure. As shown in Figures 1-4, the fluid chamber body 10 also has:

[0099] The pressure relief chamber 107 is located inside the second wall 1042;

[0100] The high-pressure chamber vent hole 108 is used to connect the pressure relief chamber 107 and the high-pressure chamber 7. In this embodiment, the high-pressure chamber vent hole 108 is disposed on the partition 100b and located inside the second wall 1042.

[0101] The low-pressure chamber vent hole 109 is used to connect the pressure relief chamber 107 and the low-pressure chamber 6. In this embodiment, the low-pressure chamber vent hole 109 is disposed on the partition 100b and located inside the second wall 1042.

[0102] The pressure relief chamber 107 is further provided with a pressure relief structure, which has a first state and a second state. In the first state, the pressure relief structure closes the high pressure chamber drain hole 108, blocking the communication between the pressure relief chamber 107 and the high pressure chamber 7. In the second state, the pressure relief structure is at least partially disconnected from the high pressure chamber drain hole 108, so that the pressure relief chamber 107 is connected to the high pressure chamber 7.

[0103] As shown in Figures 1-6, in some practical applications, the pressure relief structure includes:

[0104] A protrusion 13 is formed at the outlet end of the high-pressure chamber vent hole 108 and is arranged around the high-pressure chamber vent hole 108. As shown in FIG3, in some practical applications, the protrusion 13 includes a hollow cylindrical protrusion 131 arranged coaxially with the high-pressure chamber vent hole 108, and a plurality of ribs 132 distributed around the protrusion 131. Both the protrusion 131 and the ribs 132 protrude from the upper surface of the partition 100b. In other practical applications, there are four ribs 132, which are evenly distributed around the protrusion 131.

[0105] A pressure-regulating valve plate 14 is disposed within the pressure relief chamber 107. The top cover 12, mounted on the fluid chamber body 10, presses the edge portion of the pressure-regulating valve plate 14 into the pressure relief chamber 107 to achieve a seal (preventing leakage). As shown in Figures 1, 3, 5, 6, and 7, in some practical applications, an annular limiting step 1043 is formed on the inner side of the second wall 1042. A first annular wall 122 is formed on the top cover 12. This first annular wall 122 is used to press the edge portion of the pressure-regulating valve plate 14 onto the limiting step 1043, thus achieving a seal in the pressure relief chamber 107. The first annular wall 122 and the first shock-absorbing pad 111 form a seal, achieving a two-stage seal for the pressure relief chamber 107 (to prevent leakage from the pressure relief chamber); a second annular wall 123 is also formed on the inner side of the first annular wall 122, pressing the pressure stabilizing valve plate 14 onto several pressure ribs 132 (the second annular wall 123 is arranged coaxially or substantially coaxially with the hollow cylindrical protrusion 131, and the inner diameter of the second annular wall 123 is slightly larger than the outer diameter of the hollow cylindrical protrusion 131, for example, the inner diameter of the second annular wall 123 is 0.5-5mm larger than the outer diameter of the hollow cylindrical protrusion 131).

[0106] The elastic element 15 abuts against the top cover 12 and the pressure regulating valve plate 14 at both ends, and is arranged coaxially or substantially coaxially with the high-pressure chamber vent hole 108. As shown in Figures 5-7, in some practical applications, the elastic element 15 (e.g., a spring) is disposed inside the second annular wall 123, and the position of the elastic element 15 is limited by the second annular wall 123 to ensure the stability of the elastic element 15 during operation. In other practical applications, a spring seat 16 can be disposed between the elastic element 15 and the pressure regulating valve plate 14, and the force of the elastic element 15 is used to press the middle part of the pressure regulating valve plate 14 against the top of the hollow cylindrical protrusion 131. Since the end face of the spring seat 16 is a flat plane, the force on the middle part of the pressure regulating valve plate 14 is uniform.

[0107] As shown in Figure 5, in the first state, the pressure regulating valve plate 14 is pressed against the end face of the protrusion 13 by the elastic member 15 to close the high pressure chamber vent hole 108 and block the communication between the pressure relief chamber 107 and the high pressure chamber 7. As shown in Figure 6, in the second state, the pressure regulating valve plate 14 is partially deformed (corresponding to the part of the high pressure chamber vent hole), forming a gap between the pressure regulating valve plate 14 and the protrusion 13, so that the fluid in the high pressure chamber 7 can enter the pressure relief chamber 107 through the high pressure chamber vent hole 108 and flow back to the low pressure chamber 6 through the low pressure chamber vent hole 109. Thus, when the pressure in the high-pressure chamber 7 is too high, the fluid in the high-pressure chamber 7 overcomes the force of the elastic element 15, causing the spring seat 16 to rise. At the same time, due to the force of the first annular wall 122, the pressure stabilizing valve plate 14 is partially deformed (corresponding to the part of the high-pressure chamber vent hole), forming a gap between the pressure stabilizing valve plate 14 and the protrusion 13. At this time, the pressure relief structure enters the second state under the action of pressure. The fluid in the high-pressure chamber 7 enters the pressure relief chamber 107 through the high-pressure chamber vent hole 108, and then flows back to the low-pressure chamber 6 through the low-pressure chamber vent hole 109, thereby further reducing the water flow pulse in the buffer chamber 103.

[0108] To facilitate understanding of the technical solutions of this utility model embodiment, the following detailed description is provided in conjunction with the structure of the diaphragm pump.

[0109] As illustrated in Figures 1-17, a diaphragm pump includes a fluid chamber 1, a diaphragm chamber 2, a diaphragm 3, a support 4, and a swinging component 5. The diaphragm chamber 2 and the diaphragm 3 are installed within the cavity formed by the fluid chamber 1 and the support 4. A low-pressure chamber 6 and a high-pressure chamber 7 are formed between the fluid chamber 1 and the diaphragm chamber 2, and a pressurization chamber 8 is formed between the diaphragm chamber 2 and the diaphragm 3. The swinging component 5 is connected to the diaphragm 3. The fluid chamber 1 is a diaphragm pump fluid chamber as described above; its specific structure will not be further elaborated.

[0110] As shown in Figures 12-15, in some practical applications, the diaphragm chamber 2 includes a diaphragm chamber body 21, and an intake valve 22 and an exhaust valve 23 respectively installed on the diaphragm chamber body 21, wherein the diaphragm chamber body 21 has:

[0111] The first cavity 211 is formed in the center of the front of the diaphragm chamber body 21 and adopts a recessed design;

[0112] A sealing ring 212 is disposed in the annular groove of the outer ring of the first cavity 211;

[0113] The second cavity 213 has several (which may be three, four, five, etc.) and is independently arranged, formed on the back side of the diaphragm chamber body 21, and evenly distributed around the first cavity 211.

[0114] A water suction hole 214 is provided on the diaphragm chamber body 21, corresponding to the position of the second cavity 213, and communicates with the second cavity 213;

[0115] A drain hole 215 is provided on the diaphragm chamber body 21, corresponding to the position of the first cavity 211, and communicates with the first cavity 211 and the second cavity 213.

[0116] The suction valve 22 is installed on the second chamber 213, controlling the opening and closing of the suction hole 214; the discharge valve 23 is installed on the first chamber 211, controlling the opening and closing of the drain hole 215. In some specific implementations, the diaphragm chamber body 21 has a discharge valve mounting hole 216 at its center. The first chamber 211 and the discharge valve mounting hole 216 have the same axis. The discharge valve 23 is installed in the first chamber 211 through the discharge valve mounting hole 216. The discharge valve 23 is fixed and in sealed contact with the discharge valve mounting hole 216. The bottom surface of the discharge valve 23 is tightly fitted with the concave surface of the first chamber 211, forming a one-way check valve fit. The second chamber 213 has a suction valve mounting hole 217. The suction valve 22 is installed in the second chamber 213 through the suction valve mounting hole 217. The suction valve 22 is fixed and in sealed contact with the suction valve mounting hole 217. The suction valve 22 is tightly fitted with the concave surface of the second chamber 213, forming a one-way check valve fit.

[0117] In the assembly state shown in Figure 10, the fluid chamber 1 presses the diaphragm chamber 2 and the diaphragm 3 onto the bracket 4 and secures them with screws. Specifically, the fluid chamber body 10 presses the edge portion of the diaphragm 3 onto the end face of the bracket 4. Simultaneously, the fluid chamber body 10 presses against the limiting surface 218 of the diaphragm chamber body 21 via its stepped portion 10d, and also presses against the sealing ring 212 via its annular pressure ring 10e. This ensures that the diaphragm chamber 2 presses the diaphragm 3 against the end face of the bracket 4, meaning that the diaphragm 3 is in sealed contact with the fluid chamber body 10, the diaphragm chamber body 21, and the bracket 4. This creates a low-pressure chamber 6 and a high-pressure chamber 7 between the fluid chamber 1 and the diaphragm chamber 2, where the low-pressure chamber 6 corresponds to... At the water inlet 214, the high-pressure chamber 7 (obtained by sealing the first chamber with an annular pressure ring and a sealing ring) corresponds to the drain hole 215. Simultaneously, due to the sealing effect of the diaphragm 3, each of the second chambers 213 is sealed, forming the pressurizing chamber 8. To ensure the sealing effect of the pressurizing chamber 8, in some practical applications, ribs 219 are also provided on the diaphragm chamber body 21 at the openings corresponding to the second chambers 213. The ribs 219 press the diaphragm 3 together, forming multiple independent pressurizing chambers 8 between the diaphragm chamber body 21 and the diaphragm 3. The swing component 5 passes through a perforation on the bracket 4 and connects to the diaphragm 3.

[0118] The following is an exemplary description of one working process of the diaphragm pump in this embodiment.

[0119] The motor (not shown in the figure) operates, thereby driving the swing component 5 to move. When the swing component 5 moves downward, the volume of the booster chamber 8 increases, the pressure decreases, the suction valve 22 deforms, and the suction hole 214 opens, allowing the fluid in the low-pressure chamber 6 to enter the booster chamber 8 through the suction hole 214. When the swing component 5 moves upward, the volume of the booster chamber 8 decreases, the pressure increases, the discharge valve 23 deforms, and the drain hole 215 opens, allowing the fluid in the booster chamber 8 to enter the high-pressure chamber 7 through the drain hole 215, completing the pressurization. The fluid in the high-pressure chamber 7 enters the first buffer chamber 1031 through the first outlet hole 105 and the second buffer chamber 1032 through the second outlet hole 106, impacting the shock-absorbing pad 11 at the top and absorbing some energy, thereby reducing fluid pulses. Subsequently, the first fluid flows from the first buffer chamber 1031 to the outlet 102, and the second fluid flows from the second buffer chamber 1032 to the outlet 102. The first and second fluids converge at the outlet 102, collide with each other, and further release energy, thereby further reducing the fluid pulse. When the pressure is too high, the fluid in the high-pressure chamber 7 overcomes the force of the elastic element 15, causing the spring seat 16 to rise. At the same time, due to the force of the first annular wall 122, the pressure stabilizing valve plate 14 is partially deformed (corresponding to the part of the high-pressure chamber vent hole), forming a gap between the pressure stabilizing valve plate 14 and the protrusion 13. At this time, the pressure relief structure enters the second state under the action of pressure. The fluid in the high-pressure chamber 7 enters the pressure relief chamber 107 through the high-pressure chamber vent hole 108, and then flows back to the low-pressure chamber 6 through the low-pressure chamber vent hole 109, thereby further reducing the water flow pulse in the buffer chamber 103.

[0120] As shown in Figure 18, based on actual test results, the diaphragm pump of this embodiment reduces fluid (water flow) pulses by approximately three times compared to existing diaphragm pumps (such as the diaphragm pump product corresponding to the Chinese utility model with announcement number CN213419313U). Taking the outlet pressure of the diaphragm booster pump set to 7 Bar as an example, the water flow pulse pressure is reduced from the original 7 ± 0.24 Bar to 7 ± 0.08 Bar (specifically, the outlet pressure of 7 Bar has pulses, fluctuations, and upper and lower amplitudes; the upper limit is 7.24 Bar, and the lower limit is 6.76 Bar, so the fluctuation is ± 0.24 Bar, and the relative fluctuation pressure range is 0.48 Bar. After reducing the pulse using the diaphragm pump of this embodiment, the fluctuation is ± 0.08 Bar, and the relative fluctuation pressure range is 0.16 Bar), significantly reducing water flow pulses. In the figure, the red curve represents the outlet pressure curve of the diaphragm pump of this embodiment, and the green curve represents the outlet pressure curve of the diaphragm pump in the prior art.

[0121] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A fluid chamber for a diaphragm pump, comprising a fluid chamber body (10) and a top cover (12) mounted on the fluid chamber body (10), characterized in that, The fluid chamber body (10) has: an inlet (101) communicating with the low-pressure chamber (6) of the diaphragm pump; an outlet (102); a buffer chamber (103) located between the fluid chamber body (10) and the top cover (12), communicating with the high-pressure chamber (7) and the outlet (102) of the diaphragm pump respectively; a partition wall (104) disposed in the buffer chamber (103), dividing the buffer chamber (103) into a first buffer chamber (1031) and a second buffer chamber (1032) communicating with the outlet (102) respectively; and a first outlet hole (105). The first buffer chamber (1031) is located on one side of the partition wall (104) to connect the first buffer chamber (1031) and the high-pressure chamber (7); the second outlet (106) is located on the other side of the partition wall (104) to connect the second buffer chamber (1032) and the high-pressure chamber (7); the first fluid that enters the first buffer chamber (1031) through the first outlet (105) and flows to the outlet (102) has a different flow direction from the second fluid that enters the second buffer chamber (1032) through the second outlet (106) and flows to the outlet (102).

2. The fluid chamber for a diaphragm pump according to claim 1, characterized in that, The first fluid flows to the outlet (102) with a different flow direction than the second fluid flows to the outlet (102).

3. The fluid chamber for a diaphragm pump according to claim 2, characterized in that, The flow direction of the first fluid when it flows to the outlet (102) is opposite or substantially opposite to the flow direction of the second fluid when it flows to the outlet (102).

4. The fluid chamber for a diaphragm pump according to claim 1, characterized in that, The flow distance of the first fluid from the first outlet (105) to the outlet (102) is less than the flow distance of the second fluid from the second outlet (106) to the outlet (102); the single flow rate of the first outlet (105) is less than the single flow rate of the second outlet (106).

5. The fluid chamber for a diaphragm pump according to claim 1, characterized in that, The flow path of the first fluid from the first outlet (105) to the outlet (102) is arc-shaped or S-shaped or includes an arc segment, and the flow path of the second fluid from the second outlet (106) to the outlet (102) is arc-shaped or S-shaped or includes an arc segment.

6. The fluid chamber for a diaphragm pump according to claim 1, characterized in that, The fluid chamber body (10) also has: a side wall (100a), which is basically annular, and the inlet end of the inlet (101) and the outlet end of the outlet (102) are both located on the side wall; a partition (100b), which is integrally formed on the inner side of the side wall (100a) and divides the fluid chamber body (10) into upper and lower parts; wherein the upper part is used to form the buffer chamber (103), and the lower part is used to cooperate with the diaphragm chamber (2) of the diaphragm pump to form the low-pressure chamber (6) and the high-pressure chamber (7); the partition wall (104), the first outlet hole (105), and the second outlet hole (106) are all located on the partition.

7. The fluid chamber for a diaphragm pump according to claim 1, characterized in that, The fluid chamber further includes: a shock-absorbing pad (11) disposed on the fluid chamber body (10); the top cover (12) is connected to the fluid chamber body (10) to press the shock-absorbing pad (11) onto the fluid chamber body (10) and seal it in contact with the partition wall (104), thereby forming the buffer cavity (103) between the fluid chamber body (10) and the shock-absorbing pad (11).

8. The fluid chamber for a diaphragm pump according to claim 1, characterized in that, The partition wall (104) includes: a first wall (1041), which is disposed in the buffer cavity (103) and located between the first water outlet (105) and the second water outlet (106), and its first end is connected to the side wall (100a) of the fluid chamber body (10); and a second wall (1042), which is generally annular, with one side connected to the second end of the first wall (1041) and the other side having a gap between it and the side wall (100a) of the fluid chamber body (10) for fluid to pass through.

9. The fluid chamber for a diaphragm pump according to claim 8, characterized in that, The fluid chamber body (10) further includes: a pressure relief chamber (107) located inside the second wall (1042); a high-pressure chamber drain hole (108) for connecting the pressure relief chamber (107) with the high-pressure chamber (7); and a low-pressure chamber drain hole (109) for connecting the pressure relief chamber (107) with the low-pressure chamber (6). The pressure relief chamber (107) is also provided with a pressure relief structure, which has a first state and a second state. In the first state, the pressure relief structure closes the high-pressure chamber drain hole (108) and blocks the connection between the pressure relief chamber (107) and the high-pressure chamber (7). In the second state, the pressure relief structure is at least partially disconnected from the contact with the high-pressure chamber drain hole (108), so that the pressure relief chamber (107) is connected to the high-pressure chamber (7).

10. The fluid chamber for a diaphragm pump according to claim 9, characterized in that, The pressure relief structure includes: a protrusion (13) formed at the outlet end of the high-pressure chamber vent hole (108) and arranged around the high-pressure chamber vent hole (108); a pressure stabilizing valve plate (14) disposed in the pressure relief chamber (107), wherein the top cover (12) presses the edge portion of the pressure stabilizing valve plate (14) into the pressure relief chamber (107) to achieve sealing of the pressure relief chamber (107); and an elastic element (15) with its two ends abutting against the top cover (12) and the pressure stabilizing valve plate (14) respectively, and being coaxial or substantially coaxial with the high-pressure chamber vent hole (108). Coaxial arrangement; in the first state, the pressure regulating valve plate (14) is pressed against the end face of the protrusion (13) under the action of the elastic member (15) to close the high pressure chamber vent hole (108); in the second state, the pressure regulating valve plate (14) is partially deformed, forming a gap between the pressure regulating valve plate (14) and the protrusion (13), so that the fluid in the high pressure chamber (7) can enter the pressure relief chamber (107) through the high pressure chamber vent hole (108) and flow back to the low pressure chamber (6) through the low pressure chamber vent hole (109).

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