Quick-release valve assembly and quick-release valve integrated pump using the same

Abstract

The present invention discloses a quick-release valve assembly, which is located between the upper cover and the valve seat of the pump and is composed of a shut-off diaphragm and a support plate. The shut-off diaphragm is fixed to the bottom surface of the upper cover by means of the support plate, and a first space is formed between the shut-off diaphragm and the upper cover to communicate with the air outlet and the pressure relief hole of the upper cover. A retaining wall is provided in the middle of the upper plate surface of the support plate, and the retaining wall is fitted with the lower surface of the shut-off diaphragm under normal conditions. The retaining wall divides the space between the upper plate surface of the support plate and the shut-off diaphragm into a second space and a third space. The second space corresponds to the pressure relief hole of the upper cover. The support plate is provided with an air inlet hole in the second space, and the shut-off diaphragm forms a central gasket and an outer ring tympanic membrane in the second space corresponding to the pressure relief hole. The shut-off diaphragm forms a one-way air outlet valve in the third space to communicate with the third space and the first space. A quick-release valve integrated pump structure using the quick-release valve assembly is also disclosed. The present invention can achieve rapid deflation and stable inflation.

Description

Technical Field

[0001] The invention relates to the technical field of diaphragm pumps, and in particular to a quick-release valve assembly structure and a quick-release valve integrated pump structure using the quick-release valve assembly. Background Art

[0002] In medical blood pressure monitors, especially step-up blood pressure monitors, an air pump and a normally closed solenoid valve are normally used. When the inflation reaches a certain pressure value, the solenoid valve is powered on to open and release the pressure. In order to reduce costs, the solenoid valve is omitted, but the function is integrated into the air pump. Some industry insiders have specially developed an integrated pump that can achieve rapid pressure relief.

[0003] For example: CN201510505369.2 and CN201821850946.7, see Figure 1 and Figure 2 When the pump body is inflated, the gas first enters an intermediate air chamber 100, and then is split to both sides by the intermediate air chamber 100. A part of the gas acts on the edge of the air relief valve 200, so that the air relief valve 200 can be lifted up and the pressure relief port 300 can be blocked during inflation, and the other part acts on the one-way valve 400, so that the one-way valve 400 is opened, and the gas is discharged from the air outlet 500 to achieve inflation; when deflated, the one-way valve 400 is closed, and the gas enters the top air chamber 600 from the air outlet 500, pressing the pressure relief valve 200 downward, opening the pressure relief port 300, and the gas is discharged from the pressure relief port 300 to achieve deflation.

[0004] A careful analysis of these rapid pressure relief structures reveals that they all have the following problems: the gas is first diverted after entering the intermediate air chamber 100, and the air pressure acting on the relief valve 200 is small, so that the relief valve 200 cannot quickly block the pressure relief port 300; after the gas enters the intermediate air chamber 100, when it is inflated through the one-way valve 400, because the pressure relief port 300 is not blocked in time, the gas is inflated and deflated at the same time, which makes the inflation unstable and slow. Summary of the invention

[0005] In view of the problems existing in the prior art, the object of the present invention is to provide a quick-release valve assembly and a quick-release valve integrated pump structure using the quick-release valve assembly to achieve rapid deflation and stable inflation.

[0006] In order to achieve the above object, the solution of the present invention is:

[0007] The quick-relief valve assembly is located between the upper cover and the valve seat of the pump, and is composed of a shut-off diaphragm and a support plate. The shut-off diaphragm is pressed and fixed to the bottom surface of the upper cover by means of the support plate. A first space is formed between the shut-off diaphragm and the upper cover to connect the air outlet and the pressure relief hole of the upper cover. A retaining wall is provided in the middle of the upper plate surface of the support plate. The retaining wall fits with the lower surface of the shut-off diaphragm under normal conditions. The retaining wall divides the space between the upper plate surface of the support plate and the shut-off diaphragm into a second space and a third space. The second space corresponds to the pressure relief hole of the upper cover. The support plate is provided with an air inlet hole in the second space. The shut-off diaphragm forms a central gasket and an outer ring tympanic membrane corresponding to the pressure relief hole in the second space. The shut-off diaphragm forms a one-way air outlet valve in the third space to connect the third space with the first space.

[0008] The upper plate surface of the support plate forms a clamping column for cooperating with the clamping hole of the upper cover, the lower plate surface of the support plate forms a limiting step in the middle for supporting on the valve seat, and the middle of the limiting step forms a positioning column for cooperating with the positioning hole of the valve seat.

[0009] The upper plate surface of the support plate forms a lower circular wall corresponding to the outer ring tympanic membrane of the shut-off diaphragm in the second space, and the lower circular wall forms a lower channel opening close to the retaining wall.

[0010] The bottom surface of the upper cover corresponds to the outer ring tympanic membrane of the shut-off diaphragm to form an upper circular wall, and the upper circular wall forms an upper channel opening near the air outlet.

[0011] The bottom surface of the upper cover forms a pressure relief boss at the edge of the pressure relief hole.

[0012] The third space on the upper plate surface of the support plate forms a boss, which is in close contact with the lower surface of the shut-off diaphragm. The boss is close to the retaining wall to form a concave airflow channel, and the one-way air outlet valve of the shut-off diaphragm is arranged on the airflow channel.

[0013] The bottom surface of the upper cover forms an inner wall, the upper surface of the shut-off diaphragm forms an outer wall, the outer wall of the shut-off diaphragm is buckled on the inner wall of the upper cover, and a circle of closed convex walls is formed around the upper plate surface of the support plate, which supports the shut-off diaphragm to achieve sealing.

[0014] A groove is formed on the bottom surface of the upper cover, and the shutoff diaphragm and the support plate are assembled in the groove. The notch of the groove forms a weld line, and the weld line is partially disconnected to form a pressure reduction channel.

[0015] A quick-release valve integrated pump comprises a motor, a base, an eccentric wheel, a drive shaft, a support frame, an airbag, an airbag seat, a valve plate seat, an outlet valve plate and an upper cover; the motor is mounted on the base, and the airbag seat and the valve plate seat are assembled on the base in sequence, the airbag is mounted on the airbag seat, and the bottom of the airbag is connected to the support frame, the motor drives the airbag to move through the eccentric wheel, the drive shaft and the support frame, the outlet valve plate is installed at the position of the valve plate seat corresponding to the airbag, the valve plate seat and the upper cover are sealed and assembled together, the above-mentioned quick-release valve assembly is installed on the bottom surface of the upper cover, and a fourth space is formed between the lower plate surface of the support plate of the quick-release valve assembly and the valve plate seat and the outlet valve plate, and the air inlet hole of the support plate connects the fourth space and the second space.

[0016] A groove is formed on the bottom surface of the upper cover, and the shut-off diaphragm and the support plate are assembled in the groove. The notch of the groove forms a weld line, and the weld line is partially disconnected to form a pressure reduction channel or a pressure reduction channel is formed on the groove wall corresponding to the fourth space. The pressure reduction channel connects the fourth space to the atmosphere.

[0017] After adopting the above scheme, when the present invention is in the inflated state, at the beginning of inflation, the opening resistance is generated due to the adhesion between the retaining wall and the shut-off diaphragm, which instantly causes the pressure in the second space to rise, and the outer ring tympanic membrane and the center gasket of the shut-off diaphragm are inflated and lifted up, so that the center gasket supports the pressure relief boss and closes the pressure relief hole; when the inflation pressure is greater than the opening resistance between the retaining wall and the shut-off diaphragm, the airflow bulges the shut-off diaphragm to form a gap, and the airflow flows into the third space through this gap, and then the one-way air outlet valve is opened, and the airflow finally flows into the first space, and then is discharged from the air outlet of the upper cover to achieve inflation. When inflation stops, the air pressure in the first space is greater than the air pressure in the second space, the center gasket of the shut-off diaphragm is detached from the pressure relief hole, and the air pressure in the first space is discharged from the pressure relief hole, achieving the purpose of rapid pressure relief. Because the present invention changes the gas path, the airflow is inflated through the second space-retaining wall-third space-first space-air outlet of the upper cover. After the gas enters the second space, it directly faces the central gasket. The air pressure is large and the impact force is strong. The pressure relief port can be quickly blocked. No leakage will occur during continued inflation. The inflation is more stable and the inflation speed is increased.

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of CN201510505369.2;

[0020] Figure 2 It is a structural diagram of CN201821850946.7;

[0021] Figure 3 is an exploded top view of the quick-release valve assembly of the present invention;

[0022] Figure 4is an exploded bottom view of the quick-release valve assembly of the present invention;

[0023] Figure 5 is a top view of the shut-off diaphragm;

[0024] Figure 6 is a cross-sectional view of the shut-off diaphragm;

[0025] Figure 7 is a top view of the support plate;

[0026] Figure 8 is a bottom view of the support plate;

[0027] Fig. 9 is a transverse cross-sectional view of the support plate;

[0028] Fig.10 is a longitudinal cross-sectional view of the support plate;

[0029] Fig.11 It is a top view of the upper cover;

[0030] Fig.12 This is a bottom view of the upper cover;

[0031] Fig.13 is a cross-sectional view of the upper cover;

[0032] Fig.14 It is a combined cross-sectional view of the quick-discharge valve integrated pump of the present invention;

[0033] Fig.15 is an exploded top view of the quick-discharge valve integrated pump of the present invention;

[0034] Fig.16 It is an exploded bottom view of the quick-discharge valve integrated pump of the present invention.

[0035] Description of symbols

[0036] Middle air chamber 100, air relief valve 200, pressure relief port 300, one-way valve 400, air outlet 500, top air chamber 600;

[0037] Upper cover 1, air outlet 11, pressure relief hole 12, clamping hole 13, upper circular enclosure 14, upper channel opening 141, pressure relief boss 15, inner enclosure 16, welding line 17, pressure reduction channel 171;

[0038] Shut-off diaphragm 2, center gasket 21, outer ring tympanic membrane 22, one-way air outlet valve 23, outer peripheral wall 24;

[0039] Support plate 3, retaining wall 31, air inlet 32, clamping column 33, limiting step 34, positioning column 35, lower circular wall 36, lower channel opening 361, boss 37, air flow channel 371, closed convex wall 38;

[0040] Valve plate seat 4, positioning hole 41, air outlet valve plate 42;

[0041] Airbag seat 5, airbag 51;

[0042] Eccentric wheel 6, driving shaft 61, supporting frame 62;

[0043] Base 7;

[0044] Motor 8;

[0045] The first space is A, the second space is B, the third space is C, and the fourth space is D. DETAILED DESCRIPTION

[0046] See also Figures 3 to 16 As shown, the quick-release valve assembly disclosed in the present invention is arranged between the upper cover 1 and the valve seat 4 of the pump, and is composed of a shut-off diaphragm 2 and a support plate 3. The upper plate surface of the support plate 3 holds the shut-off diaphragm 2, and the shut-off diaphragm 2 is pressed and fixed to the bottom surface of the upper cover 1 with the help of the support plate 3. The upper cover 1 has an air outlet 11 and a pressure relief hole 12, and a first space A is formed between the shut-off diaphragm 2 and the upper cover 1, and the first space A is connected to the air outlet 11 and the pressure relief hole 12. A retaining wall 31 is provided in the middle of the upper plate surface of the support plate 3, and the retaining wall 31 is in contact with the lower surface of the shut-off diaphragm 2 under normal conditions, and the retaining wall 31 divides the space between the upper plate surface of the support plate 3 and the shut-off diaphragm 2 into a second space B and a third space C. The second space B corresponds to the pressure relief hole 12 of the upper cover 1, and the support plate 3 is provided with an air inlet 32 ​​in the second space B. The shut-off diaphragm 2 forms a central gasket 21 and an outer ring tympanum 22 in the second space B corresponding to the pressure relief hole 12. The best design is shown in the figure: the air inlet 32 ​​is aligned with the central gasket 21 and the pressure relief hole 12. The cross-section of the outer ring tympanum 22 shown in the figure is wavy, and the shut-off diaphragm 2 forms a one-way air outlet valve 23 corresponding to the third space C to connect the third space C and the first space A. As shown in the figure, a half-moon-shaped opening is formed on the shut-off diaphragm 2, and the part surrounded by the half-moon-shaped opening forms a one-way air outlet valve 23.

[0047] In order to facilitate assembly and positioning, the support plate 3 of the present invention can be assembled in the manner shown in the figure, but is not limited to the structure shown in the figure. The upper plate surface of the support plate 3 forms a clamping column 33, the lower plate surface of the support plate 3 forms a limiting step 34 in the middle, and the limiting step 34 forms a positioning column 35 in the middle. During assembly, the clamping column 33 cooperates with the clamping hole 13 of the upper cover 1 for positioning, the limiting step 34 supports and limits the upper surface of the valve seat 4, and the positioning column 35 cooperates with the positioning hole 41 of the valve seat 4 for positioning, so that the shut-off diaphragm 2 and the support plate 3 of the quick-release valve assembly are positioned and installed between the upper cover 1 and the valve seat 4 of the pump. The bottom surface of the upper cover 1 forms an inner wall 16, and the upper surface of the shut-off diaphragm 2 forms an outer wall 24. The outer wall 24 of the shut-off diaphragm 2 is buckled on the inner wall 16 of the upper cover 1 to achieve sealing between the shut-off diaphragm 2 and the upper cover 1. A circle of closed convex walls 38 are formed around the upper plate surface of the support plate 3, and the convex walls 38 support the shut-off diaphragm 2 to further achieve sealing.

[0048] Furthermore, the present invention can also form a groove on the bottom surface of the upper cover 1, and the shut-off diaphragm 2 and the support plate 3 are assembled in the groove, the notch of the groove forms a weld line 17, and the weld line 17 is partially disconnected to form a pressure reduction channel 171.

[0049] The optimized structure of the present invention is: the portion of the upper plate surface of the support plate 3 in the second space B corresponds to the outer ring tympanic membrane 22 of the shut-off diaphragm 2 to form a lower circular enclosure 36, and the lower circular enclosure 36 forms a lower channel opening 361 near the retaining wall 31. The lower channel opening 361 is used for the passage of the inflated airflow, and the size of the lower channel opening 361 and the distance between the lower channel opening 361 and the retaining wall 31 affect the opening speed between the retaining wall 21 and the shut-off diaphragm 2. The closer the distance between the lower channel opening 361 and the retaining wall 31, the more difficult it is to open the retaining wall 31, and the stronger the shut-off ability of the shut-off diaphragm 2. The bottom surface of the upper cover 1 corresponds to the outer ring tympanic membrane 22 of the shut-off diaphragm 2 to form an upper circular enclosure 14, and the upper circular enclosure 14 forms an upper channel opening 141 near the air outlet 11. The upper channel opening 141 is used for the passage of the pressure-relieving airflow, and the upper channel opening 141 affects the pressure-relieving speed. The best design is that the upper circular enclosure 14 and the lower circular enclosure 36 are opposite. In this way, with the help of the cooperation between the upper circular wall 14 and the lower circular wall 36, the upper and lower positions of the outer ring tympanic membrane 22 are positioned, ensuring that the movement of the center gasket 21 and the outer ring tympanic membrane 22 is more accurate.

[0050] A pressure relief boss 15 is formed on the bottom surface of the upper cover 1 at the edge of the pressure relief hole 12. The pressure relief boss 15 and the center gasket 21 of the shut-off diaphragm 2 fit tightly together during the inflation process to achieve a shut-off function. When the power is cut off and the inflation is stopped, the center gasket 21 of the shut-off diaphragm 2 is disengaged from the pressure relief boss 15, and the air pressure is discharged from the pressure relief hole 12, thereby achieving the purpose of rapid pressure relief.

[0051] The upper plate surface of the support plate 3 forms a boss 37 in the third space C, and the boss 37 is in close contact with the lower surface of the shut-off diaphragm 2. The boss 37 forms a recessed air flow channel 371 close to the retaining wall 31. The one-way air outlet valve 23 of the shut-off diaphragm 2 is arranged on the air flow channel 371 to control the connection between the third space C and the first space A.

[0052] The quick-discharge valve integrated pump comprises a motor 8, a base 7, an eccentric wheel 6, a drive shaft 61, a support frame 62, an air bag 51, an air bag seat 5, a valve plate seat 4, an outlet valve plate 42 and an upper cover 1. The motor 8 is installed on the base 7, and the airbag seat 5 and the valve seat 4 are assembled on the base 7 in sequence. The airbag 51 is installed on the airbag seat 5, and the bottom of the airbag 51 is connected to the support frame 62. The motor 8 drives the airbag 51 to move through the eccentric wheel 6, the driving shaft 61 and the support frame 62. The outlet valve plate 42 is installed at the position of the valve seat 4 corresponding to the airbag 51. The valve seat 4 and the upper cover 1 are sealed and assembled together. The shut-off diaphragm 2 and the support plate 3 of the quick-release valve assembly are installed on the bottom surface of the upper cover 1. The lower plate surface of the support plate 3 of the quick-release valve assembly forms a fourth space D with the valve seat 4 and the outlet valve plate 42. The air inlet 32 ​​of the support plate 3 connects the fourth space D and the second space B. The fourth space D and the second space B constitute a pressure chamber with the required pressure for the shut-off diaphragm 2 to close the pressure relief hole 12.

[0053] The present invention can also form a groove on the bottom surface of the upper cover 1, and the shut-off diaphragm 2 and the support plate 3 are assembled in the groove. The notch of the groove forms a weld line 17. The upper cover 1 is assembled with the valve seat 4 by ultrasonic welding through the weld line 17. The weld line 17 is partially disconnected to form a pressure reduction channel 171, or a pressure reduction channel is formed on the groove wall corresponding to the fourth space D. The pressure reduction channel 171 enables the fourth space D to communicate with the atmosphere outside the pump. The function of the pressure reducing channel 171 is that when the air pump is inflating, the micro-leakage generated is not enough to affect the inflation speed; when the air pump is powered off and stops inflating, the air pressure in the fourth space D is reduced through the pressure reducing channel 171. At the same time, the second space B is also reduced in pressure due to the connection of the air inlet hole 32. In this way, the pressure in the first space A is greater than the pressure in the second space B, forming a pressure difference. The pressure difference produces different pressures and different pressures on the upper and lower surfaces of the shut-off diaphragm 2. The pressure difference causes the center gasket 21 of the shut-off diaphragm 2 to separate from the pressure relief boss 15 of the pressure relief hole 12, thereby realizing the function of rapid pressure relief.

[0054] The quick-release valve assembly of the present invention is used in an air pump. When the air pump is powered on and begins to inflate, the retaining wall 31 fits against the shut-off diaphragm 2 to generate opening resistance, which instantly increases the pressure in the second space B, causing the outer ring tympanic membrane 22 and the center gasket 21 of the shut-off diaphragm 2 to swell and push upward, and the center gasket 21 presses against the pressure relief boss 15 to shut off the pressure relief hole 12. When the inflation pressure is greater than the opening resistance between the retaining wall 21 and the shut-off diaphragm 2, the airflow will inflate the shut-off diaphragm 2 to form a gap, and the airflow will flow into the third space C through this gap, and then the one-way air outlet valve 23 will be opened, and the airflow will eventually flow into the first space A, and then be discharged from the air outlet 11 of the upper cover 1 to achieve inflation. When inflation stops, the one-way air outlet valve 23 is closed, the air pressure in the first space A is greater than the air pressure in the second space B, and under the action of the pressure difference, the outer ring tympanic membrane 22 of the shut-off diaphragm 1 collapses downward, the center gasket 21 is disengaged from the pressure relief hole 12, and the air pressure in the first space A is discharged from the pressure relief hole 12, thereby achieving the purpose of rapid pressure relief.

[0055] The above description is only a specific embodiment of the present invention and is not intended to limit the protection scope of the present invention. It should be noted that equivalent changes made by those skilled in the art based on the design ideas of this case after reading this specification all fall within the protection scope of this case.

Claims

1. A quick-release valve assembly, characterized in that: The valve seat is located between the upper cover of the pump and the valve seat, and is composed of a shut-off diaphragm and a support plate. The shut-off diaphragm is pressed and fixed on the bottom surface of the upper cover by means of the support plate. A first space is formed between the shut-off diaphragm and the upper cover, which is connected to the air outlet and the pressure relief hole of the upper cover. A retaining wall is provided in the middle of the upper plate surface of the support plate. The retaining wall fits with the lower surface of the shut-off diaphragm under normal conditions. The retaining wall divides the upper plate surface of the support plate and the shut-off diaphragm into a second space and a third space. The second space corresponds to the pressure relief hole of the upper cover. The support plate is provided with an air inlet hole in the second space. The shut-off diaphragm forms a central gasket and an outer ring tympanic membrane in the second space corresponding to the pressure relief hole. The shut-off diaphragm forms a one-way air outlet valve in the third space, which connects the third space and the first space. The upper plate surface of the support plate and the upper cover form a clamping column and a clamping hole. A circle of closed convex walls is formed around the upper plate surface of the support plate, and the convex walls support the shut-off diaphragm.

2. The quick-release valve assembly according to claim 1, characterized in that: A limiting step is formed in the middle of the lower plate surface of the support plate for supporting on the valve seat, and a positioning column is formed in the middle of the limiting step to cooperate with the positioning hole of the valve seat, so that the support plate is fixed between the upper cover and the valve seat.

3. The quick-release valve assembly according to claim 1, characterized in that: The upper plate surface of the support plate forms a lower circular wall corresponding to the outer ring tympanic membrane of the shut-off diaphragm in the second space, and the lower circular wall forms a lower channel opening close to the retaining wall.

4. The quick-release valve assembly according to claim 1, characterized in that: The bottom surface of the upper cover corresponds to the outer ring tympanic membrane of the shut-off diaphragm to form an upper circular wall, and the upper circular wall forms an upper channel opening near the air outlet.

5. The quick-release valve assembly according to claim 1, characterized in that: The bottom surface of the upper cover forms a pressure relief boss at the edge of the pressure relief hole.

6. The quick-release valve assembly according to claim 1, characterized in that: The third space on the upper plate surface of the support plate forms a boss, which is in close contact with the lower surface of the shut-off diaphragm. The boss is close to the retaining wall to form a concave airflow channel, and the one-way air outlet valve of the shut-off diaphragm is arranged on the airflow channel.

7. The quick-release valve assembly according to claim 1, characterized in that: The bottom surface of the upper cover forms an inner wall, the upper surface of the shut-off diaphragm forms an outer wall, and the outer wall of the shut-off diaphragm is buckled on the inner wall of the upper cover.

8. The quick-release valve assembly according to claim 1, characterized in that: A groove is formed on the bottom surface of the upper cover, and the shutoff diaphragm and the support plate are assembled in the groove. The notch of the groove forms a weld line, and the weld line is partially disconnected to form a pressure reduction channel.

9. A quick-release valve integrated pump, comprising a motor, a base, an eccentric wheel, a drive shaft, a support frame, an airbag, an airbag seat, a valve seat, an outlet valve and an upper cover; the motor is mounted on the base, the airbag seat and the valve seat are assembled on the base in sequence, the airbag is mounted on the airbag seat, the bottom of the airbag is connected to the support frame, the motor drives the airbag to move through the eccentric wheel, the drive shaft and the support frame, the outlet valve is mounted on the valve seat at a position corresponding to the airbag, the valve seat and the upper cover are assembled together in a sealed manner, and the characteristics are: The bottom surface of the upper cover is installed with the quick-release valve assembly as described in any one of claims 1 to 7, and a fourth space is formed between the lower plate surface of the support plate of the quick-release valve assembly and the valve plate seat and the outlet valve plate, and the air inlet hole of the support plate connects the fourth space and the second space.

10. The quick-discharge valve integrated pump according to claim 9, characterized in that: A groove is formed on the bottom surface of the upper cover, and the shut-off diaphragm and the support plate are assembled in the groove. The notch of the groove forms a weld line, and the weld line is partially disconnected to form a pressure reduction channel or a pressure reduction channel is formed on the groove wall corresponding to the fourth space. The pressure reduction channel connects the fourth space to the atmosphere.

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