Double pressure diaphragm pump structure

Abstract

The utility model relates to diaphragm pump technical field, concretely is a kind of double-pressure diaphragm pump structure, including drive unit, it includes motor;Pump body assembly, it includes shell, valve plate and top cover in the order along the axial direction of motor;The shell is composed of lower shell and middle shell, the inside of the middle shell is provided with cavity plate, first leather cup cavity and second leather cup cavity are provided on the cavity plate side by side;Alternating compression mechanism, it is set in the shell and is driven by the motor, for reciprocating alternately to compress or expand first leather cup cavity and second leather cup cavity;Flow channel assembly, it is integrated on the valve plate and top cover.The utility model realizes the effect of two-stage pressurization by the alternating compression of two leather cup cavities, significantly improves the pressure and flow stability of export medium, overcomes the obvious pulse of single-cavity diaphragm pump, the shortcoming of insufficient pressure.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm pump technology, specifically a dual-pressure diaphragm pump structure. Background Technology

[0002] Diaphragm pumps, as a type of positive displacement pump that uses the reciprocating deformation of a flexible diaphragm to transport media, are widely used in various fields due to their advantages such as good sealing performance and ability to handle a variety of media.

[0003] Currently, most micro diaphragm pumps on the market adopt a single-chamber structure with a diaphragm or valve plate type check valve. The basic working principle is that the motor drives a cup to reciprocate. When the cup expands, the chamber generates negative pressure and draws in the medium; when the cup is compressed, the chamber generates positive pressure and discharges the medium.

[0004] Because there is only one working chamber, the pump's water output process is intermittent, resulting in unstable output flow and noticeable pulsation. Furthermore, the pressure generated in a single compression is limited, making it difficult to meet the demands of applications requiring high injection pressure or head. Utility Model Content

[0005] The technical solution adopted by this utility model is as follows:

[0006] A dual-pressure diaphragm pump structure includes:

[0007] A drive unit, which includes a motor;

[0008] The pump body assembly includes, in sequence along the axial direction of the motor, a housing, a valve plate, and a top cover; the housing is composed of a lower housing and a middle housing, and a cavity plate is provided on the inner side of the middle housing, with a first diaphragm cavity and a second diaphragm cavity arranged side by side on the cavity plate;

[0009] An alternating compression mechanism, which is disposed within the housing and driven by the motor, is used to reciprocate alternately compress or expand the first and second diaphragm chambers;

[0010] A flow channel assembly is integrated on the valve plate and the top cover; the valve plate has a groove 1 and a groove 2 respectively communicating with the first and second diaphragm cavities on the side facing the cavity plate; the valve plate has an inlet groove, a transfer groove and an outlet groove on the side facing the top cover.

[0011] The flow channel assembly also includes a plurality of water passage holes formed in the valve plate for sequentially connecting the inlet tank, the first diaphragm cavity, the transfer tank, the second diaphragm cavity and the outlet tank;

[0012] A one-way valve assembly, comprising multiple one-way valves disposed in the first groove, the transfer groove and the outlet groove, for controlling the one-way flow of the medium in the flow channel.

[0013] Preferably, the alternating compression mechanism includes:

[0014] An eccentric block, which is connected to the output shaft of the motor;

[0015] The connecting plate has sliding sleeves fixedly connected to both ends;

[0016] Two swing rods, one end of which is fixedly connected to the bottom of the first and second leather cup cavities respectively, and the other end is movably connected to both ends of the connecting plate through a sliding sleeve;

[0017] A shaft is fixedly disposed in the middle of the connecting plate and is connected to the eccentric block through an inclined shaft hole;

[0018] The motor drives the eccentric block to rotate, which in turn drives the two swing arms to reciprocate alternately through the shaft and connecting plate.

[0019] Preferably, the one-way valve assembly includes:

[0020] A first umbrella-shaped one-way valve is disposed in the groove and is used to control the flow of medium from the first water passage to the second water passage;

[0021] The second umbrella-shaped check valve is disposed in the transfer tank and is used to control the flow of the medium from the second water passage to the third water passage;

[0022] The third umbrella-shaped one-way valve is located in the water outlet tank and is used to control the flow of the medium from the fourth water passage.

[0023] Preferably, the valve plate is tightly fitted to the cavity plate, so that the first groove and the second groove form sealed chambers with the first and second diaphragm cavities, respectively.

[0024] Preferably, a sealing gasket is provided between the top cover and the valve plate.

[0025] Preferably, the top cover is provided with an inlet pipe communicating with the inlet tank and an outlet pipe communicating with the outlet tank.

[0026] Preferably, the water passage includes: a first water passage connecting the water inlet trough and the first groove, a second water passage connecting the first groove and the transfer trough, a third water passage connecting the transfer trough and the second groove, and a fourth water passage connecting the second groove and the outlet trough.

[0027] The beneficial effects of this utility model are:

[0028] 1. By alternating compression of the two cup chambers, a two-stage pressurization effect is achieved, which significantly improves the pressure and flow stability of the outlet medium and overcomes the shortcomings of single-chamber diaphragm pumps, such as obvious pulses and insufficient pressure.

[0029] 2. The use of an umbrella-shaped one-way valve and the design of a precision flow channel within the valve plate avoids the sticking and jamming problems that easily occur between the valve plate and the plastic parts in simple structures, making opening and closing more reliable.

[0030] 3. All flow channels are integrated inside the valve plate and top cover, making external pipeline connections simple. The overall structure is compact and small in size, making it very suitable for miniaturized applications. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 This is a schematic diagram showing the valve plate separated from the housing in this utility model;

[0033] Figure 3 This is an exploded sectional view of the present invention;

[0034] Figure 4 This is a schematic diagram of the flow channel assembly of this utility model;

[0035] Figure 5 This is a cross-sectional view of the flow channel assembly.

[0036] In the diagram: 1. Lower housing; 2. Middle housing; 3. Valve plate; 4. Top cover; 5. Cavity plate; 6. First cup cavity; 7. Second cup cavity; 8. Rocker arm; 9. Motor; 10. Eccentric block; 11. Sliding sleeve; 12. Connecting plate; 13. Shaft; 14. Inlet groove; 15. Transfer groove; 16. Outlet groove; 17. Groove one; 18. Groove two; 19. First water passage hole; 20. Second water passage hole; 21. Third water passage hole; 22. Fourth water passage hole; 23. First umbrella-shaped check valve; 24. Second umbrella-shaped check valve; 25. Third umbrella-shaped check valve; 26. Inlet pipe; 27. Outlet pipe; 28. Sealing gasket. Detailed Implementation

[0037] See attached document Figure 1-5 A dual-pressure diaphragm pump structure, comprising:

[0038] A drive unit, which includes a motor 9;

[0039] The pump body assembly includes a housing, a valve plate 3, and a top cover 4 in sequence along the axial direction of the motor 9. The housing consists of a lower housing 1 and a middle housing 2. A cavity plate 5 is provided on the inner side of the middle housing 2. A first cup cavity 6 and a second cup cavity 7 are arranged side by side on the cavity plate 5. The components are connected by bolts.

[0040] An alternating compression mechanism, which is located inside the housing and driven by a motor 9, is used to reciprocate alternately compress or expand the first cup cavity 6 and the second cup cavity 7.

[0041] The flow channel assembly is integrated on the valve plate 3 and the top cover 4; the valve plate 3 has groove 17 and groove 218 on the side facing the cavity plate 5, which are respectively connected to the first diaphragm cavity 6 and the second diaphragm cavity 7; the valve plate 3 has water inlet groove 14, transfer groove 15 and water outlet groove 16 on the side facing the top cover 4.

[0042] The flow channel assembly also includes a plurality of water passage holes formed in the valve plate 3 for sequentially connecting the water inlet trough 14, the first diaphragm cavity 6, the transfer trough 15, the second diaphragm cavity 7 and the water outlet trough 16. The water passage holes include: a first water passage hole 19 connecting the water inlet trough 14 and the first groove 17, a second water passage hole 20 connecting the first groove 17 and the transfer trough 15, a third water passage hole 21 connecting the transfer trough 15 and the second groove 18, and a fourth water passage hole 22 connecting the second groove 18 and the water outlet trough 16.

[0043] A one-way valve assembly, comprising multiple one-way valves disposed in a groove 17, a transfer groove 15 and an outlet groove 16, for controlling the one-way flow of the medium in the flow channel;

[0044] The top cover 4 is provided with an inlet pipe 26 that is connected to the inlet tank 14 and an outlet pipe 27 that is connected to the outlet tank 16.

[0045] The alternating compression mechanism includes:

[0046] Eccentric block 10 is connected to the output shaft of motor 9;

[0047] The connecting plate 12 has sliding sleeves 11 fixedly connected to both ends;

[0048] Two swing rods 8, one end of which is fixedly connected to the bottom of the first leather cup cavity 6 and the second leather cup cavity 7 respectively, and the other end is movably connected to both ends of the connecting plate 12 through the sliding sleeve 11;

[0049] The shaft 13 is fixedly disposed in the middle of the connecting plate 12 and is connected to the eccentric block 10 through an inclined shaft hole;

[0050] Motor 9 drives eccentric block 10 to rotate, which in turn drives two swing rods 8 to reciprocate alternately through shaft 13 and connecting plate 12.

[0051] The eccentric block 10 cooperates with the connecting plate 12 with the shaft 13 to cleverly convert the rotational motion of the motor 9 into the linear reciprocating motion of the two swing rods 8. The transmission efficiency is high, ensuring that the motion phases of the two swing rods 8 are exactly opposite, thereby realizing the strict alternating compression and expansion of the two cup cavities, and the operation is coordinated and reliable.

[0052] Furthermore, the inertial forces generated by the reciprocating motion of the two levers 8 can partially cancel each other out, effectively reducing the vibration and wear of the mechanism.

[0053] One-way valve assembly includes:

[0054] The first umbrella-shaped one-way valve 23 is disposed in the groove 17 and is used to control the flow of the medium from the first water passage 19 to the second water passage 20.

[0055] The second umbrella-shaped check valve 24 is located in the transfer tank 15 and is used to control the flow of the medium from the second water passage 20 to the third water passage 21.

[0056] The third umbrella-shaped check valve 25 is located in the outlet tank 16 and is used to control the flow of the medium from the fourth water passage 22.

[0057] The arrangement of three umbrella-shaped check valves at key nodes strictly restricts the flow direction of the medium, ensuring the effective implementation of dual-pressure operation and preventing backflow of the medium. Under pressure, the umbrella-shaped structure can fit well with the valve plate 3, and the sealing performance is better than that of a simple plate valve, which helps to improve the pump's vacuum and output pressure.

[0058] The valve plate 3 fits tightly against the cavity plate 5, so that the first groove 17 and the second groove 18 form sealed chambers with the first leather cup cavity 6 and the second leather cup cavity 7, respectively.

[0059] The tight fit ensures a good seal between the groove and the cup cavity, preventing internal media leakage and external air ingress, thus guaranteeing the pump's working efficiency.

[0060] A sealing gasket 28 is provided between the top cover 4 and the valve plate 3.

[0061] The sealing gasket 28 effectively prevents the medium from flowing between the grooves integrated on the surface of the valve plate 3 and from leaking to the outside of the pump, further improving the pump's performance and reliability.

[0062] Working process and principle:

[0063] Initial drive: Motor 9 starts and drives eccentric block 10 to rotate. Eccentric block 10 converts the rotational motion into planar reciprocating motion of connecting plate 12 through shaft 13 that is inclined to it.

[0064] The connecting plate 12 drives the two swing rods 8 to reciprocate alternately through the sliding sleeves 11 at both ends;

[0065] Phase 1:

[0066] The first cup cavity 6 is opened under the action of the swing rod 8, the cavity volume increases, and negative pressure is generated inside. At this time, the first umbrella-shaped one-way valve 23 is drawn open by the negative pressure, and the medium enters the water inlet tank 14 from the water inlet pipe 26, enters the groove 17 through the first water passage hole 19, and flows into the first cup cavity 6 to complete the water absorption.

[0067] The second cup cavity 7 is compressed under the action of another swing rod 8, the cavity volume decreases and the internal pressure increases. At this time, the second umbrella-shaped check valve 24 closes under pressure, preventing the medium from flowing back. The medium can only flow from the second groove 18 through the fourth water passage 22 to the water outlet 16. The third umbrella-shaped check valve 25 is opened by high pressure, and the medium is discharged from the water outlet pipe 27, completing the drainage.

[0068] Phase Two:

[0069] The first cup cavity 6 is compressed, the cavity volume decreases, the internal pressure increases, the first umbrella-shaped one-way valve 23 closes under pressure, preventing the medium from flowing back directly, and the medium enters the transfer tank 15 from the groove 17 through the second water passage 20;

[0070] The second umbrella-shaped check valve 24 is opened by high pressure, and the medium enters the groove 18 through the third water passage 21.

[0071] The second cup cavity 7 is unfolded, the cavity volume increases, and a negative pressure is generated inside. The medium is drawn into the second cup cavity 7 from the groove 18 to complete the water absorption. At the same time, the medium from the first cup cavity 6 is also replenished into the second cup cavity 7.

[0072] In the outlet tank 16, due to the pressure drop after the previous stage of drainage, the third umbrella-shaped check valve 25 closes to prevent backflow of the medium.

[0073] The two stages described above proceed at high speed, alternately, and continuously as the motor 9 rotates. While one chamber is absorbing water, the other chamber is discharging water or preparing to discharge water, thus forming a continuous, stable, and high-pressure water flow at the outlet.

[0074] The dual-pressure diaphragm pump structure of this utility model has the following advantages:

[0075] 1. By alternating compression of the two cup chambers, a two-stage pressurization effect is achieved, which significantly improves the pressure and flow stability of the outlet medium and overcomes the shortcomings of single-chamber diaphragm pumps, such as obvious pulses and insufficient pressure.

[0076] 2. The use of an umbrella-shaped one-way valve and the design of a precision flow channel within the valve plate 3 avoids the sticking and jamming problems that easily occur between the valve plate and the plastic parts in a simple structure, making opening and closing more reliable.

[0077] 3. All flow channels are integrated inside the valve plate 3 and the top cover 4, making external pipeline connections simple. The overall structure is compact and small in size, making it very suitable for miniaturized applications.

[0078] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made to the above embodiments by those skilled in the art after reading this specification are all within the scope of protection of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0079] If the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

Claims

1. A dual-pressure diaphragm pump structure, characterized in that, include: A drive unit, which includes a motor (9); The pump body assembly includes a housing, a valve plate (3) and a top cover (4) in sequence along the axial direction of the motor (9); the housing is composed of a lower housing (1) and a middle housing (2), and a cavity plate (5) is provided on the inner side of the middle housing (2), and a first cup cavity (6) and a second cup cavity (7) are arranged side by side on the cavity plate (5). An alternating compression mechanism, which is disposed inside the housing and driven by the motor (9), is used to reciprocate alternately compress or expand the first cup cavity (6) and the second cup cavity (7). The flow channel assembly is integrated on the valve plate (3) and the top cover (4); the valve plate (3) has a groove 1 (17) and a groove 2 (18) respectively communicating with the first cup cavity (6) and the second cup cavity (7) on the side facing the cavity plate (5); the valve plate (3) has an inlet groove (14), a transfer groove (15) and an outlet groove (16) on the side facing the top cover (4). The flow channel assembly also includes a plurality of water passage holes formed in the valve plate (3) for sequentially connecting the inlet tank (14), the first cup cavity (6), the transfer tank (15), the second cup cavity (7) and the outlet tank (16); A one-way valve assembly includes multiple one-way valves disposed in the groove (17), the transfer groove (15) and the outlet groove (16) for controlling the one-way flow of the medium in the flow channel.

2. The dual-pressure diaphragm pump structure according to claim 1, characterized in that, The alternating compression mechanism includes: An eccentric block (10) is connected to the output shaft of the motor (9); The connecting plate (12) has a sliding sleeve (11) fixedly connected to both ends; Two swing rods (8) are fixedly connected at one end to the bottom of the first leather cup cavity (6) and the second leather cup cavity (7) respectively, and at the other end are movably connected to both ends of the connecting plate (12) through a sliding sleeve (11); The shaft (13) is fixedly disposed in the middle of the connecting plate (12) and is connected to the eccentric block (10) through an inclined shaft hole; The motor (9) drives the eccentric block (10) to rotate, and then drives the two swing arms (8) to reciprocate alternately through the shaft (13) and the connecting plate (12).

3. The dual-pressure diaphragm pump structure according to claim 1, characterized in that, The one-way valve assembly includes: The first umbrella-shaped one-way valve (23) is disposed in the groove (17) and is used to control the flow of the medium from the first water passage (19) to the second water passage (20). The second umbrella-shaped check valve (24) is disposed in the transfer tank (15) and is used to control the flow of the medium from the second water passage (20) to the third water passage (21). The third umbrella-shaped check valve (25), which is located in the outlet tank (16), is used to control the flow of the medium from the fourth water passage (22).

4. The dual-pressure diaphragm pump structure according to claim 1, characterized in that, The valve plate (3) fits tightly against the cavity plate (5), so that the first groove (17) and the second groove (18) form sealed chambers with the first cup cavity (6) and the second cup cavity (7), respectively.

5. The dual-pressure diaphragm pump structure according to claim 1, characterized in that, A sealing gasket (28) is provided between the top cover (4) and the valve plate (3).

6. The dual-pressure diaphragm pump structure according to claim 1, characterized in that, The top cover (4) is provided with an inlet pipe (26) that communicates with the inlet tank (14) and an outlet pipe (27) that communicates with the outlet tank (16).

7. The dual-pressure diaphragm pump structure according to claim 1, characterized in that, The water passage includes: a first water passage (19) connecting the water inlet trough (14) and the first groove (17), a second water passage (20) connecting the first groove (17) and the transfer trough (15), a third water passage (21) connecting the transfer trough (15) and the second groove (18), and a fourth water passage (22) connecting the second groove (18) and the outlet trough (16).

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