One-way valve device and pump thereof

Abstract

The present invention relates to a one-way valve device and a pump thereof, a micro pump for accurate extraction of fluid, wherein the pump (10) is characterized by comprising a driving part and a pump head part; the driving part comprises: a base housing (5), and a driving mechanism (7) arranged in the base housing (5); a motor (6) connected to the driving mechanism (7) by a motor shaft (61); the pump head part comprises: a fluid inlet (11), a fluid outlet (12); and corresponding inlet cover plates (2) and outlet cover plates (1) for setting the fluid inlet (11) and the fluid outlet (12) respectively; a valve seat (3) for mounting an umbrella-shaped valve plate (31) for fluid inlet and a valve plate (32) for fluid outlet; a diaphragm seat (4), a diaphragm (42) mounted in a mounting hole (41) of the diaphragm seat (4), and a mounting column (421) of the diaphragm (42) connected to the driving mechanism (7) through a fixing hole (741) mounted on a bracket (74). The effect of quickly and accurately opening and closing the fluid outlet is achieved.

Description

Technical Field

[0001] The invention relates to a micro pump device, in particular to a micro pump with a one-way valve device having a precise non-return closing function, in particular to a one-way valve device and a pump thereof. Background Art

[0002] With the daily life of AI automation products, micro pumps and valves are increasingly used in fluid control of various daily necessities, such as medical devices, food appliances, household cleaning appliances, etc. These products have higher and higher requirements for flow accuracy and opening and closing accuracy. In the quantitative process, precise opening and closing are required. Therefore, it is necessary to set a check valve at the outlet of the micro pump that can open and close accurately and quickly.

[0003] In view of the above shortcomings, the present invention adopts the following technical solutions to improve them. Summary of the invention

[0004] The purpose of the present invention is to provide a one-way valve device and a pump thereof, and the disclosed technical solution is as follows:

[0005] A pump with a one-way valve device, a micro pump for accurate extraction of fluid, the pump (10) being characterized by comprising a drive part and a pump head part;

[0006] The driving part comprises: a base shell (5), and a driving mechanism (7) arranged in the base shell (5); a motor (6) drivingly connected to the driving mechanism (7) via a motor shaft (61);

[0007] The pump head part comprises: a fluid inlet (11), a fluid outlet (12); and corresponding inlet cover plates (2) and outlet cover plates (1) for setting the fluid inlet (11) and the fluid outlet (12), respectively; a valve seat (3) for mounting a fluid inlet umbrella-shaped valve plate (31) and a fluid outlet valve plate (32); a diaphragm seat (4), a diaphragm (42) being mounted in a mounting hole (41) of the diaphragm seat (4), and a mounting column (421) of the diaphragm (42) being connected to a driving mechanism (7) via a fixing hole (741) mounted on a bracket (74);

[0008] Wherein, a one-way valve (8) is arranged between the inlet cover plate (2) and the outlet cover plate (1) for one-way sealing of the fluid outlet.

[0009] Furthermore, the fluid outlet (12) is arranged at the center position of the outlet cover plate (1) to form a fluid channel with the center through hole of the inlet cover plate (2), and the one-way valve (8) is arranged on the fluid channel formed by the center through hole formed by the outlet cover plate (1) and the inlet cover plate (2).

[0010] Furthermore, the one-way valve (8) includes a valve plate (81) for opening and closing the one-way valve, a valve plate seat (82), and an axial pressure member (83) mounted on a fixed seat (85) provided in the fluid outlet (12) of the outlet cover plate (1) through an elastic member (84).

[0011] Furthermore, the valve plate seat (82) is arranged on the inlet cover plate (2), the fixed seat (85) is arranged on the outlet cover plate (1), and the central parts of the inlet cover plate (2) and the outlet cover plate (1) form a central outlet fluid channel. The periphery of the central outlet fluid channel (21) of the inlet cover plate (2) forms a fluid inlet channel (22), and a filter device (9) is arranged on the inlet channel (22), and the filter device (9) includes an inner mounting groove (93) of a fixing column (211) adapted to the central outlet fluid channel (21) of the inlet cover plate (2), and an outer mounting groove (92) adapted to the mounting hole (221) of the fluid inlet channel (22). The central outlet fluid channel (21) and the fluid inlet channel (22) of the inlet cover plate (2) are adapted to the fluid outlet channel (31) and the fluid inlet channel (32) on the valve seat (3) to form a complete fluid inlet and outlet channel.

[0012] Furthermore, the valve plate (81) includes an annular valve diaphragm (812) having a central through hole (811), and the periphery of the valve diaphragm (812) is formed with a valve outer ring (817) through an inclined step (816), and a sealing convex ring (813) is provided on the surface of the valve outer ring (817) close to the valve seat, and the valve plate seat (82) includes an inner concave valve seat cavity surrounded by an outer annular boss seat ring (824), and the valve seat cavity includes a central retaining ring (821) and a valve seat through hole (822) provided on the periphery of the central retaining ring (821), and the valve outer ring (817) and the boss seat ring (824) are conformally fitted. The valve seat (82) and the valve plate (81) are sealed and connected at the periphery through the sealing convex ring (813) and the sealing concave ring (823); and the diameter of the central through hole (811) of the valve plate (81) is smaller than the central retaining ring (821) of the valve seat (82); the annular valve diaphragm (812) is concavely fitted to the central through hole (811) of the valve seat (82) through the inclined step (816), wherein the annular valve diaphragm (812) is one-way sealed and fitted to the central retaining ring (821), and the orifice of the valve seat through hole (822) is arranged corresponding to the main surface of the annular valve diaphragm (812).

[0013] Furthermore, the fixing seat (85) disposed at the fluid outlet (12) is provided with a retaining ring (851) at the edge, and a boss ring (814) is provided on the outer side of the annular valve diaphragm (812) of the valve plate (81) facing the fluid outlet (12), and the top surface of the boss ring (814) is in contact with the retaining ring (851), wherein the bottom surface (8511) of the edge of the retaining ring (851) and the chamfered inclined surface (8512) form a protruding corner (8513), and the middle position of the annular top surface of the boss ring (814) is in contact with the corner. When the valve plate is opened due to pressure, a rotational mechanical connection is formed while limiting the valve plate from moving away.

[0014] Furthermore, the axial pressure member (83) is configured as an annular radial bottom surface (831) having a central air flow hole (836) and an annular cylindrical inner retaining ring (832) and an outer retaining ring (833) integrally formed in the axial direction close to the outlet, the radial bottom surface (831) is adapted to the valve diaphragm (812), and the elastic member (84) is arranged in a gap cavity (834) formed between the inner retaining ring (832) and the outer retaining ring (833) to abut against the radial bottom surface (831). ), the other end of the elastic member (84) is fixedly arranged on the convex column (854) of the fixed seat (85) of the fluid outlet (12), the radial bottom surface (831) is provided with a bottom surface through hole (835), the axial height of the annular cylindrical inner retaining ring (832) is less than that of the outer retaining ring (833), and when the outer retaining ring (833) is adapted to contact the bottom end surface (852) of the fixed seat (85), a gap (853) is formed between the inner retaining ring (832) and the convex column (854). Therefore, when the one-way valve is in the open state and the reverse pressure is formed to close, the airflow can pass through the gap (853) and then through the bottom surface through hole (835) provided on the radial bottom surface (831) of the axial pressure member (83), exerting pressure on the valve diaphragm (812) body, thereby realizing the function of quickly closing the one-way valve.

[0015] The present invention also discloses a one-way valve device, comprising a valve plate (81) for opening and closing the one-way valve, a valve plate seat (82), and an axial pressure member (83) installed on a fixed seat (85) arranged in a fluid outlet (12) of an outlet cover plate (1) through an elastic member (84), characterized in that the valve plate (81) comprises an annular valve diaphragm (812) having a central through hole (811), the periphery of the valve diaphragm (812) is formed by an inclined step (816) to form a valve outer ring (817), a sealing convex ring (813) is arranged on the surface of the valve outer ring (817) close to the valve seat, the valve plate seat (82) comprises an inner concave valve seat cavity surrounded by an outer annular boss seat ring (824), the valve seat cavity comprises a central retaining ring (821) and a central retaining ring (821) arranged in the middle. The valve seat through hole (822) is arranged on the periphery of the center retaining ring (821), the valve outer ring (817) is conformably fitted with the boss seat ring (824), the valve seat (82) and the valve plate (81) are sealed and connected at the periphery through the sealing convex ring (813) and the sealing concave ring (823); and the diameter of the center through hole (811) of the valve plate (81) is smaller than the center retaining ring (821) of the valve plate seat (82), the annular valve diaphragm (812) is concavely fitted to the center retaining ring (821) of the valve plate seat (82) through the inclined step (816), wherein the annular valve diaphragm (812) is one-way sealed and fitted on the center retaining ring (821), and the orifice of the valve seat through hole (822) is arranged corresponding to the main surface of the annular valve diaphragm (812).

[0016] Furthermore, the fixing seat (85) disposed at the fluid outlet (12) is provided with a retaining ring (851) at the edge, and a boss ring (814) is provided on the outer side of the annular valve diaphragm (812) of the valve plate (81) facing the fluid outlet (12), and the top surface of the boss ring (814) is in contact with the retaining ring (851), wherein the bottom surface (8511) of the edge of the retaining ring (851) and the chamfered inclined surface (8512) form a protruding corner (8513), and the middle position of the annular top surface of the boss ring (814) is in contact with the corner. When the valve plate is opened due to pressure, while limiting the valve plate from disengaging and moving, a rotating mechanical connection is formed, which not only ensures that the valve plate can be rotated to a certain angle and opened quickly under positive pressure, but also can be closed quickly and accurately because the valve plate is limited to a fixed position.

[0017] Furthermore, the axial pressure member (83) is configured as an annular radial bottom surface (831) having a central air flow hole (836) and an annular cylindrical inner retaining ring (832) and an outer retaining ring (833) integrally formed in the axial direction close to the outlet, the radial bottom surface (831) is adapted to the valve diaphragm (812), the elastic member (84) is arranged in a gap cavity (834) formed between the inner retaining ring (832) and the outer retaining ring (833) and is fixed against the radial bottom surface (831), the other end of the elastic member (84) is fixedly arranged on a convex column (854) of a fixed seat (85) of the fluid outlet (12), and the radial bottom surface (831) is adapted to the valve diaphragm (812), the elastic member (84) is arranged in a gap cavity (834) formed between the inner retaining ring (832) and the outer retaining ring (833) and is fixed to the radial bottom surface (831), and the other end of the elastic member (84) is fixedly arranged on a convex column (854) of a fixed seat (85) of the fluid outlet (12), and the radial bottom surface (831) is adapted to the valve diaphragm (812) and the valve diaphragm (812 ... The inner surface (831) is provided with a bottom through hole (835), the axial height of the annular cylindrical inner retaining ring (832) is smaller than that of the outer retaining ring (833), and when the outer retaining ring (833) contacts the bottom end surface (852) of the fixed seat (85), a gap (853) is formed between the inner retaining ring (832) and the protruding column (854). Therefore, when the one-way valve is in an open state and a reverse pressure is formed to close, the airflow can pass through the gap (853) and then through the bottom through hole (835) provided on the radial bottom surface (831) of the axial pressure member (83), exerting pressure on the valve diaphragm (812) body, thereby realizing the function of quickly closing the one-way valve.

[0018] According to the above technical scheme, the present invention has the following beneficial effects:

[0019] 1. A pump with a one-way valve device in the present invention is provided with a one-way valve device in a fluid channel formed between an inlet cover plate and an outlet cover plate of the pump, so as to achieve the effect of quickly and accurately opening and closing the fluid outlet.

[0020] 2. In the one-way valve device provided in the pump body of the present invention, the valve plate is provided as an annular diaphragm structure with a central through hole. The fluid through hole of the valve plate seat corresponds to the annular diaphragm body. The pressure formed from the side to the center causes the valve plate to form a certain rotation tendency in the process of opening. The valve plate and the step corner point of the fixed seat at the outlet end form a rotational contact connection, which realizes the flexible opening of the valve plate while limiting the fixed position of the valve plate.

[0021] 3. In the one-way valve device provided in the pump body of the present invention, the height of the annular inner retaining ring provided on the radial bottom surface of the pressure shaft member of the valve plate is smaller than that of the annular outer retaining ring. When the one-way valve is in the open state, when the annular outer retaining ring touches the bottom end surface of the outlet fixed seat, there is still a certain gap between the annular inner retaining ring and the convex column at the bottom end of the fixed seat, and a fluid channel is formed with the gap cavity between the inner retaining ring and the outer retaining ring, and the bottom through hole of the pressure shaft member. When the reverse pressure closes the one-way valve, the airflow pressure can quickly and accurately close the one-way valve through the fluid channel formed thereby.

[0022] 4. A pump with a one-way valve device in the present invention has a structure in which an outlet fluid channel is formed in the center of the inlet cover plate and the outlet cover plate and an inlet channel is formed on the periphery, and the corresponding central outlet fluid channel and the peripheral inlet channel on the valve seat cooperate with each other, which is more suitable for the installation design of the filter device, and realizes the effect of effective filtering of the fluid by the fluid inlet cavity channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the overall structure of the pump of the preferred embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the explosion of the pump structure of the preferred embodiment of the present invention;

[0025] Figure 3 A schematic cross-sectional view of the internal structure of the pump of the preferred embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the one-way valve installation structure of the best embodiment of the present invention;

[0027] Figure 5 A schematic diagram of an explosion decomposition of a one-way valve according to a preferred embodiment of the present invention;

[0028] Figure 6 A schematic diagram of a one-way valve fluid passage of the preferred embodiment of the present invention;

[0029] Figure 7 A schematic diagram of the one-way valve seat structure of the best embodiment of the present invention;

[0030] Figure 8 A schematic top view of a one-way valve device according to a preferred embodiment of the present invention;

[0031] Fig. 9 A bottom view schematic diagram of a one-way valve device according to a preferred embodiment of the present invention;

[0032] Fig.10 It is a partially enlarged schematic diagram of a one-way valve device according to a preferred embodiment of the present invention;

[0033] Fig.11 A partially enlarged schematic diagram of another state of the one-way valve device of the best embodiment of the present invention;

[0034] Fig.12 It is a partially enlarged schematic diagram of the one-way valve device in the fully open state according to the best embodiment of the present invention;

[0035] Fig.13 A schematic diagram of a fluid channel structure filtering device according to a preferred embodiment of the present invention;

[0036] Fig.14This is a schematic diagram of the fluid channel structure filter device and the fluid inlet cover plate in the best embodiment of the present invention;

[0037] Fig.15 This is a schematic diagram of the decomposition and valve seat cooperation of the fluid channel structure filtering device of the best embodiment of the present invention.

[0038] In the figure, a pump 10, a fluid inlet 11, and a fluid outlet 12;

[0039] Exit cover 1;

[0040] Inlet cover 2,;

[0041] Valve seat 3, inlet fluid umbrella-shaped valve disc 31, outlet fluid valve disc 32;

[0042] Diaphragm seat 4, mounting hole 41, diaphragm 42, mounting column 421;

[0043] Base housing 5;

[0044] Motor 6, motor shaft 61;

[0045] Driving mechanism 7, eccentric shaft 71, eccentric wheel 72, eccentric hole 73, bracket 74;

[0046] One-way valve 8, valve disc 81, valve disc seat 82, axial pressure piece 83, elastic piece 84, fixed seat 85; center through hole 811, annular valve diaphragm 812, sealing convex ring 813, boss ring 814, center retaining ring 821, valve seat through hole 822, sealing concave ring 823, radial bottom surface 831, inner retaining ring 832, outer retaining ring 833, gap cavity 834, bottom through hole 835, retaining ring 851, edge bottom surface 8511, chamfered inclined surface 8512, corner 8513, bottom end surface 852, gap 853, convex column 854,

[0047] Filter device 9, filter hole 91, outer mounting groove 92, inner mounting groove 93. DETAILED DESCRIPTION

[0048] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0049] like Figures 1 to 5As shown, a pump with a one-way valve device is a micro pump for accurate extraction of fluid, and the pump 10 includes a driving part and a pump head part. The driving part includes: a base shell 5, and a driving mechanism 7 arranged in the base shell 5; a motor 6, which is driven and connected to the driving mechanism 7 through a motor shaft 61; the pump head part includes: a fluid inlet 11, a fluid outlet 12; and a corresponding inlet cover plate 2 and an outlet cover plate 1 for setting the fluid inlet 11 and the fluid outlet 12 respectively; a valve seat 3, which is used to install an umbrella-shaped valve plate 31 for inlet fluid and a valve plate 32 for outlet fluid; a diaphragm seat 4, a diaphragm 42 is installed in the installation hole 41 of the diaphragm seat 4, and the installation column 421 of the diaphragm 42 is connected to the driving mechanism 7 through a fixing hole 741 installed on a bracket 74; wherein, a one-way valve 8 is arranged between the inlet cover plate 2 and the outlet cover plate 1 for one-way sealing of the fluid outlet.

[0050] like Figure 3 , 4 As shown in 5 , the fluid outlet 12 is arranged at the center of the outlet cover plate 1 to form a fluid channel with the center through hole of the inlet cover plate 2 , and the one-way valve 8 is arranged on the fluid channel formed by the center through hole formed by the outlet cover plate 1 and the inlet cover plate 2 .

[0051] like Figure 5 As shown, the one-way valve 8 includes a valve plate 81 for opening and closing the one-way valve, a valve plate seat 82 , and an axial pressure member 83 mounted on a fixed seat 85 provided in the fluid outlet 12 of the outlet cover plate 1 through an elastic member 84 .

[0052] like Figure 5 , 13 As shown in FIGS. 14 and 15 , the valve plate seat 82 is arranged on the inlet cover plate 2, the fixing seat 85 is arranged on the outlet cover plate 1, and the central part of the inlet cover plate 2 and the outlet cover plate 1 forms a central outlet fluid channel. The periphery of the central outlet fluid channel 21 of the inlet cover plate 2 forms a fluid inlet channel 22, and a filter device 9 is arranged on the inlet channel 22. The filter device 9 includes an inner mounting groove 93 adapted to the fixing column 211 of the central outlet fluid channel 21 of the inlet cover plate 2, and an outer mounting groove 92 adapted to the mounting hole 221 of the fluid inlet channel 22. The central outlet fluid channel 21 and the fluid inlet channel 22 of the inlet cover plate 2 are adapted to the fluid outlet channel 31 and the fluid inlet channel 32 on the valve seat 3 to form a complete fluid inlet and outlet channel.

[0053] like Figure 7 and Figure 8As shown in the figure, the valve plate 81 includes an annular valve diaphragm 812 with a central through hole 811, and the periphery of the valve diaphragm 812 is formed by a bevel step 816 to form a valve peripheral ring 817. A sealing convex ring 813 is arranged on the surface of the valve peripheral ring 817 close to the valve seat. The valve plate seat 82 includes a concave valve seat cavity surrounded by an outer annular boss seat ring 824. The valve seat cavity includes a central retaining ring 821 and a valve seat through hole 822 arranged on the periphery of the central retaining ring 821. The valve peripheral ring 817 conforms to the boss seat ring 824. The valve seat 82 and the valve plate 81 are sealed and connected at the periphery through a sealing convex ring 813 and a sealing concave ring 823; and the diameter of the central through hole 811 of the valve plate 81 is smaller than the central retaining ring 821 of the valve seat 82, and the annular valve diaphragm 812 is concavely fitted to the central through hole 811 and the central retaining ring 821 of the valve seat 82 through an inclined step 816, wherein the annular valve diaphragm 812 is unidirectionally sealed and fitted to the central retaining ring 821, and the orifice of the valve seat through hole 822 is set corresponding to the main surface of the annular valve diaphragm 812.

[0054] like Fig.10 , 11 As shown in FIG. 12 , a retaining ring 851 is provided at the edge of the fixed seat 85 disposed at the fluid outlet 12, and a boss ring 814 is provided on the outer side of the annular valve diaphragm 812 of the valve plate 81 facing the fluid outlet 12, and the top surface of the boss ring 814 is in contact with the retaining ring 851, wherein the bottom surface 8511 of the edge of the retaining ring 851 and the chamfered inclined surface 8512 form a protruding corner 8513, and the middle position of the annular top surface of the boss ring 814 is in contact with the corner. When the valve plate is opened due to pressure, a rotating mechanical connection is formed while limiting the movement of the valve plate. Fig.10 In the middle, the one-way valve is completely closed. Fig.11 The middle is the second position open state, and the arrow direction is the fluid flow direction. Fig.12 In the fully open state, the valve plate 81 is limited to rotate at a certain angle.

[0055] In addition, the axial pressure member 83 is configured as an annular radial bottom surface 831 with a central air flow hole 836, and an annular cylindrical inner retaining ring 832 and an outer retaining ring 833 are integrally formed in the axial direction near the outlet. The radial bottom surface 831 is adapted to the valve diaphragm 812, and the elastic member 84 is arranged in the gap cavity 834 formed between the inner retaining ring 832 and the outer retaining ring 833, which is abutted against the radial bottom surface 831 and fixed. The other end of the elastic member 84 is fixedly arranged on the convex column 854 of the fixed seat 85 of the fluid outlet 12, and the radial bottom surface 831 is provided with a bottom surface through hole 835. The axial height of the annular cylindrical inner retaining ring 832 is less than that of the outer retaining ring 833. When the outer retaining ring 833 is adapted to touch the bottom end surface 852 of the fixed seat 85, a gap 853 is formed between the inner retaining ring 832 and the convex column 854. Therefore, when the one-way valve is in the open state and the reverse pressure is formed to close it, the air flow can pass through the gap 853 and then through the bottom through hole 835 set on the radial bottom surface 831 of the axial pressure member 83, exerting pressure on the valve diaphragm 812 body, thereby realizing the function of quickly closing the one-way valve.

[0056] like Figure 7 and 8 As shown, the present invention further discloses a one-way valve device, including a valve plate 81 for opening and closing the one-way valve, a valve plate seat 82, and an axial pressure member 83 installed on a fixed seat 85 arranged in a fluid outlet 12 of an outlet cover plate 1 through an elastic member 84. The valve plate 81 includes an annular valve diaphragm 812 having a central through hole 811, and a valve outer ring 817 is formed on the periphery of the valve diaphragm 812 through an inclined step 816. A sealing convex ring 813 is arranged on the surface of the valve outer ring 817 close to the valve seat. The valve plate seat 82 includes an inner concave valve seat cavity surrounded by an outer annular boss seat ring 824, and the valve seat cavity includes a central retaining ring 821 and A valve seat through hole 822 is arranged on the periphery of the center retaining ring 821, and the valve outer ring 817 is conformably fitted with the boss seat ring 824. The valve seat 82 and the valve plate 81 are sealed and connected at the periphery through the sealing convex ring 813 and the sealing concave ring 823; and, the diameter of the center through hole 811 of the valve plate 81 is smaller than the center retaining ring 821 of the valve plate seat 82, and the annular valve diaphragm 812 is concavely fitted to the center through hole 811 through the inclined step 816, wherein the annular valve diaphragm 812 is unidirectionally sealed and fitted on the center retaining ring 821, and the orifice of the valve seat through hole 822 is arranged corresponding to the main surface of the annular valve diaphragm 812.

[0057] like Fig.10 , 11As shown in Figures 12 and 13, a retaining ring 851 is provided at the edge of the fixed seat 85 disposed at the fluid outlet 12, and a boss ring 814 is provided on the outer side of the annular valve diaphragm 812 of the valve plate 81 facing the fluid outlet 12, and the top surface of the boss ring 814 is in contact with the retaining ring 851, wherein the bottom surface 8511 of the edge of the retaining ring 851 and the chamfered inclined surface 8512 form a protruding corner 8513, and the middle position of the annular top surface of the boss ring 814 is in contact with the corner. When the valve plate is opened due to pressure, while limiting the valve plate from moving away, a rotating mechanical connection is formed, which not only ensures that the valve plate can be rotated to a certain angle and opened quickly under positive pressure, but also can be closed quickly and accurately because the valve plate is limited to a fixed position.

[0058] In addition, the axial pressure member 83 is configured as an annular radial bottom surface 831 with a central air flow hole 836, and an annular cylindrical inner retaining ring 832 and an outer retaining ring 833 are integrally formed in the axial direction near the outlet. The radial bottom surface 831 is adapted to the valve diaphragm 812, and the elastic member 84 is arranged in the gap cavity 834 formed between the inner retaining ring 832 and the outer retaining ring 833, which is abutted against the radial bottom surface 831 and fixed. The other end of the elastic member 84 is fixedly arranged on the convex column 854 of the fixed seat 85 of the fluid outlet 12, and the radial bottom surface 831 is provided with a bottom surface through hole 835. The axial height of the annular cylindrical inner retaining ring 832 is smaller than that of the outer retaining ring 833. When the outer retaining ring 833 contacts the bottom end surface 852 of the fixed seat 85, a gap 853 is formed between the inner retaining ring 832 and the convex column 854. Therefore, when the one-way valve is in the open state and the reverse pressure is formed to close it, the air flow can pass through the gap 853 and then through the bottom through hole 835 set on the radial bottom surface 831 of the axial pressure member 83, exerting pressure on the valve diaphragm 812 body, thereby realizing the function of quickly closing the one-way valve.

[0059] The above is one embodiment of the present invention. In addition, it should be noted that any equivalent or simple changes made based on the structure, features and principles described in this patent concept are included in the protection scope of this patent.

Claims

1. A pump with a one-way valve device, characterized in that It includes a driving part and a pump head part; The driving part comprises: a base shell (5), and a driving mechanism (7) arranged in the base shell (5); a motor (6) drivingly connected to the driving mechanism (7) via a motor shaft (61); The pump head part comprises: a fluid inlet (11), a fluid outlet (12); and corresponding inlet cover plates (2) and outlet cover plates (1) for setting the fluid inlet (11) and the fluid outlet (12) respectively; a valve seat (3) for mounting an umbrella-shaped valve plate (31) for inlet fluid and a valve plate (32) for outlet fluid; a diaphragm seat (4), a diaphragm (42) being mounted in a mounting hole (41) of the diaphragm seat (4), and a mounting column (421) of the diaphragm (42) being connected to a driving mechanism (7); wherein a one-way valve (8) is arranged between the inlet cover plate (2) and the outlet cover plate (1) for one-way sealing of the fluid outlet; The one-way valve (8) comprises a valve plate (81) for opening and closing the one-way valve, a valve plate seat (82), and an axial pressure member (83) mounted on a fixed seat (85) provided in a fluid outlet (12) of the outlet cover plate (1) through an elastic member (84); The valve plate (81) comprises an annular valve diaphragm (812) having a central through hole (811); the axial pressure member (83) comprises an annular radial bottom surface (831); the annular radial bottom surface (831) is provided with a central air flow hole (836); the annular radial bottom surface (831) is integrally formed with an annular cylindrical inner retaining ring (832) and an outer retaining ring (833) in the axial direction close to the outlet; a gap cavity is formed between the inner retaining ring (832) and the outer retaining ring (833); the annular radial bottom surface (831) is suitable for Equipped with an annular valve diaphragm (812), the annular radial bottom surface (831) is provided with a bottom surface through hole (835); when the one-way valve (8) is in an open state and a reverse pressure is formed to close, a gap (835) is formed between the inner retaining ring (832) and the convex column (854) of the outlet cover plate (1), and after the fluid passes through the gap (853), the gap cavity (834) and the bottom surface through hole (835), pressure is applied to the main body of the annular valve diaphragm (812) to quickly close the one-way valve (8).

2. A pump with a one-way valve device according to claim 1, characterized in that The fluid outlet (12) is arranged at the center of the outlet cover plate (1) to form a fluid channel with the center through hole of the inlet cover plate (2); the one-way valve (8) is arranged on the fluid channel formed by the center through hole formed by the outlet cover plate (1) and the inlet cover plate (2).

3. A pump with a one-way valve device according to claim 1, characterized in that The valve plate seat (82) is arranged on the inlet cover plate (2), and the fixing seat (85) is arranged on the outlet cover plate (1). The central parts of the inlet cover plate (2) and the outlet cover plate (1) form a central outlet fluid channel.

4. A pump with a one-way valve device according to claim 1, characterized in that The outer periphery of the annular valve diaphragm (812) is formed into a valve outer ring (817) through an inclined step (816), and a sealing convex ring (813) is provided on the surface of the valve outer ring (817) close to the valve seat. The valve seat (82) includes a concave valve seat cavity surrounded by an outer annular boss seat ring (824), and the valve seat cavity includes a center retaining ring (821) and a valve seat through hole (822) arranged on the outer periphery of the center retaining ring (821). The valve outer ring (817) is conformally fitted with the boss seat ring (824), and a sealing concave ring (823) is provided on the outer periphery of the boss seat ring (824) of the valve seat (82). The valve plate (82) and the valve disc (81) are sealed and connected at the periphery through the sealing convex ring (813) and the sealing concave ring (823); and the diameter of the central through hole (811) of the valve disc (81) is smaller than the diameter of the central retaining ring (821) of the valve disc seat (82); the annular valve diaphragm (812) is concavely fitted to the central through hole (811) of the valve disc seat (82) through the inclined step (816); the annular valve diaphragm (812) is one-way sealed and fitted to the central retaining ring (821); the orifice of the valve seat through hole (822) is arranged corresponding to the main surface of the annular valve diaphragm (812).

5. A pump with a one-way valve device according to claim 1, characterized in that A retaining ring (851) is arranged at the edge of the fixing seat (85) of the fluid outlet (12); a boss ring (814) is arranged on the outer side of the annular valve diaphragm (812) of the valve plate (81) facing the fluid outlet (12); the top surface of the boss ring (814) is in contact with the retaining ring (851); the retaining ring (851) has an edge bottom surface (8511) and a chamfered inclined surface (8512); the edge bottom surface (8511) and the chamfered inclined surface (8512) form a protruding corner (8513); the middle position of the annular top surface of the boss ring (814) is in contact with the corner.

6. A pump with a one-way valve device according to claim 1, characterized in that One end of the elastic member (84) is arranged in a gap cavity (834) formed between the inner retaining ring (832) and the outer retaining ring (833) and is fixed to the radial bottom surface (831). The other end of the elastic member (84) is fixed to a convex column (854) of a fixed seat (85) of the fluid outlet (12). The axial height of the annular cylindrical inner retaining ring (832) is smaller than the axial height of the outer retaining ring (833). When the outer retaining ring (833) is adapted to contact the bottom end surface (852) of the fixed seat (85), a gap (853) is formed between the inner retaining ring (832) and the convex column (854).

7. A one-way valve device for a pump as claimed in any one of claims 1 to 6, comprising a valve plate (81) for opening and closing the one-way valve, a valve plate seat (82), and an axial pressure member (83) mounted on a fixed seat (85) provided in a fluid outlet (12) of an outlet cover plate (1) through an elastic member (84), characterized in that The valve plate (81) includes an annular valve diaphragm (812) having a central through hole (811), and the outer periphery of the annular valve diaphragm (812) is formed by an inclined step (816) to form a valve outer ring (817), and a sealing convex ring (813) is provided on the surface of the valve outer ring (817) close to the valve seat, and the valve plate seat (82) includes an inner concave valve seat cavity surrounded by an outer annular boss seat ring (824), and the valve seat cavity includes a central retaining ring (821) and a valve seat through hole (822) provided on the outer periphery of the central retaining ring (821), and the valve outer ring (817) is conformably fitted with the boss seat ring (824), and the boss seat ring (824) of the valve plate seat (82) is provided with a sealing convex ring (813) on the outer surface. A sealing concave ring (823) is arranged around the valve seat (82) and the valve plate (81) are sealed and connected at the periphery through the sealing convex ring (813) and the sealing concave ring (823); and the diameter of the central through hole (811) of the valve plate (81) is smaller than the diameter of the central retaining ring (821) of the valve seat (82); the annular valve diaphragm (812) is concavely fitted to the central through hole (811) of the valve seat (82) through the inclined step (816), wherein the annular valve diaphragm (812) is one-way sealed and fitted to the central retaining ring (821), and the orifice of the valve seat through hole (822) is arranged corresponding to the main surface of the annular valve diaphragm (812).

8. The one-way valve device according to claim 7, characterized in that A retaining ring (851) is provided at the edge of the fixing seat (85) of the fluid outlet (12), and a boss ring (814) is provided on the outer side of the annular valve diaphragm (812) of the valve plate (81) facing the fluid outlet (12), and the top surface of the boss ring (814) is in contact with the retaining ring (851), wherein the bottom surface (8511) of the edge of the retaining ring (851) and the chamfered inclined surface (8512) form a protruding corner (8513), and the middle position of the annular top surface of the boss ring (814) is in contact with the corner.

9. The one-way valve device according to claim 7, characterized in that The axial pressure member (83) is configured as an annular radial bottom surface (831) having a central air flow hole (836) and an annular cylindrical inner retaining ring (832) and an outer retaining ring (833) integrally formed in the axial direction close to the outlet, the radial bottom surface (831) is adapted to the annular valve diaphragm (812), and one end of the elastic member (84) is arranged in a gap cavity (834) formed between the inner retaining ring (832) and the outer retaining ring (833) to abut against the radial bottom surface (831). The other end of the elastic member (84) is fixedly arranged on a convex column (854) of a fixed seat (85) of the fluid outlet (12); the radial bottom surface (831) is provided with a bottom surface through hole (835); the axial height of the annular cylindrical inner retaining ring (832) is smaller than the axial height of the outer retaining ring (833); when the outer retaining ring (833) contacts the bottom end surface (852) of the fixed seat (85), a gap (853) is formed between the inner retaining ring (832) and the convex column (854).

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