JP6276589B2 - Quick drain valve integrated diaphragm pump - Google Patents

Description

  The present invention relates to a rapid discharge valve-integrated diaphragm pump, and in particular, an integrated quick discharge valve structure that reduces the pressure applied to a pressurized object such as a sphygmomanometer when the supply of air to the pressurized object is stopped. The present invention relates to a rapid exhaust valve integrated diaphragm pump.

  Conventionally, in order to supply pressurized air to an object to be pressurized such as a sphygmomanometer, a diaphragm pump provided with a rapid exhaust valve structure has been used. In this diaphragm pump, a quick exhaust valve structure is provided at the outlet of the diaphragm pump, and when the diaphragm pump is stopped after supplying pressurized air to the pressurized object, the pressure remaining in the pressurized object is changed to atmospheric pressure. (See, for example, Patent Document 1).

  An example of this rapid exhaust valve structure is shown in FIG. The rapid exhaust valve structure 200 includes a container 210, a valve body 220 provided in the container 210, and a spring 230 that biases the valve body 220. Here, the container 210 is provided with a supply port 211 for supplying air, a discharge port 212 for supplying air to the pressurized object, and an exhaust port 213 for exhausting the air in the container 210.

  The valve body 220 is provided in the container 210 and separates the internal space of the container 210 into an input side space 214 connected to the supply port 211 and an output side space 215 connected to the discharge port 212 and the exhaust port 213. The valve body 220 includes a valve body 221 that selectively closes the supply port 211 or the exhaust port 213, a support portion 222 that supports the valve body 221, and a communication that communicates between the input side space 214 and the output side space 215. And a passage 223. The spring 230 urges the valve body 221 toward the supply port 211.

  When air is supplied from the pump chamber of the diaphragm pump to the supply port 211 of such a quick exhaust valve structure 200, the air has closed the supply port 211 as indicated by the solid line arrow 221. , And enters the output side space 215 from the input side space 214 through the communication path 223.

  In this case, pressure loss occurs when air passes through the communication path 223, and the pressure in the input side space 214 becomes higher than the pressure in the output side space 215. When the pressure difference between the pressure in the input side space 214 and the pressure in the output side space 215 becomes larger than the elastic force of the spring 230, the exhaust port 213 is closed by the valve body 221, and the discharge port 212, the exhaust port 213, Therefore, the air supplied to the supply port 211 is discharged from the discharge port 212 to the pressurized object as indicated by the solid arrow.

  On the other hand, when the diaphragm pump is stopped and the supply of air to the supply port 211 is stopped, the air supplied to the pressurized object flows backward from the discharge port 212 to the output side space 215 as indicated by the broken arrow. The difference between the pressure in the input side space 214 and the pressure in the output side space 215 is reduced via the communication path 223.

  As a result, the valve body 221 is pushed down to the supply port 211 side by the elastic force of the spring 230, and the discharge port 212 and the exhaust port 213 communicate with each other, so that the air in the output side space 215 is exhausted from the exhaust port 213 to the outside. Then, the pressure in the output side space 215 connected to the pressurized object through the discharge port 212 becomes atmospheric pressure.

JP 2012-172577 A

  Thus, in the rapid exhaust valve structure 200 described above, when the diaphragm pump is stopped and the supply of air to the supply port 211 is stopped, the valve main body 221 is pushed down toward the supply port 211, and the discharge port 212 and the exhaust port 213. Therefore, air that flows backward from the pressurized object through the discharge port 212 is forcibly discharged to the outside through the output side space 215 and the exhaust port 213, but the discharge time is shortened and added. It is necessary to increase the diameter of the exhaust port 213 in order to bring the pressure remaining on the pressure object to atmospheric pressure within a short time.

  In that case, a large amount of air that flows backward from the pressurized object through the discharge port 212 passes from the output side space 215 to the exhaust port 213 at a high speed, and the influence of the air is caused by the valve body 221 of the valve body 220. Since it receives and vibrates, there is a problem that noise is generated.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a rapid discharge valve integrated diaphragm pump having a small size and a simple configuration with less noise.

In order to achieve this object, the invention according to claim 1 includes a diaphragm (7) having a diaphragm portion (71) forming a pump chamber (70), and a diaphragm holder (6) for holding the diaphragm (7). And a drive mechanism (5) for expanding and contracting the pump chamber (70) by deforming the diaphragm portion (71), and the pump chamber together with the diaphragm portion in a state of being disposed on the diaphragm (7). An inflow passage (82a) for forming and flowing gas into the pump chamber (70) from the outside, an output passage (81) for outputting gas from the pump chamber (70), and a discharge passage for discharging gas to the pressurized object (113a) and a container (9) having an exhaust passage (111) for exhausting an internal gas, and an internal space of the container (9) in a state of being disposed in the container (9), The input side space (9a) communicated with the pump chamber (70) via the output passage (81), and the output side space (9b) communicated with the discharge passage (113a) and the exhaust passage (111). And an exhaust valve (121) having an exhaust valve body (121) that closes the exhaust passage (111) when gas is supplied from the pump chamber (70) to the input side space (9a). 12), and when no gas is supplied from the pump chamber (70) to the input side space (9a), the exhaust valve body (121) is moved to the exhaust passage. (111) is opened, the discharge passage (113a) and the exhaust passage (111) are communicated, and the pressurized object flows back to the output side space (9b) through the discharge passage (113a). Air is introduced into the exhaust passage (11 ) From a temporary storage chamber for exhausting after temporarily storing a (150, 170), the temporary storage chamber (150), wherein the diaphragm of the case which is disposed below the diaphragm holder 6 (4) (7) and the internal space accommodating the drive mechanism (5) .

  According to the present invention, after the gas is discharged from the pump chamber (70) to the pressurized object through the input side space (9a), the output side space (9b), and the discharge passage (113a), the pump chamber (70) When gas is no longer supplied from the gas to the input side space (9a), the exhaust valve body (121) opens the exhaust passage (111) to connect the discharge passage (113a) and the exhaust passage (111), and pressurizes The air flowing backward from the object to the output side space (9b) through the discharge passage (113a) is input from the exhaust passage (111) to the temporary storage chamber (150, 170), and is temporarily stored and then exhausted. Thereby, since the pressure difference between the pressure in the output side space (9b) and the pressure in the temporary storage chamber (150, 170) does not increase, the gas flowing from the output side space (9b) to the exhaust passage (111) Since the influence on the exhaust valve body (121) is reduced and the exhaust valve body (121) is not vibrated, the generation of noise can be suppressed.

  According to the present invention, the temporary storage chamber (150) is an internal space that houses the diaphragm (7) and the drive mechanism (5) of the case (4) disposed below the diaphragm holder (6). There is no need to newly provide a temporary storage chamber (170), and the size and the configuration can be simplified.

It is sectional drawing which shows the structure of a rapid exhaust valve integrated type diaphragm pump. It is an approximate line sectional view used for explanation when air is supplied to a pressurization subject in a rapid exhaust valve integrated diaphragm pump. It is an approximate line sectional view used for explanation when air flows backward from a pressurization subject in a rapid exhaust valve integrated diaphragm pump. FIG. 4 is a simplified schematic diagram showing the air flow when the pump is ON and when the pump is OFF in the rapid exhaust valve integrated diaphragm pump. It is a simple schematic diagram which shows the structure of the rapid exhaust valve integrated diaphragm pump in a reference example . It is sectional drawing which shows the structure of the conventional quick exhaust valve structure.

  Embodiments of the present invention will be described below.

<Configuration of diaphragm pump with integrated quick drain valve>
As shown in FIG. 1, a rapid discharge valve integrated diaphragm pump 1000 according to the present embodiment includes a diaphragm pump main body 1 and a rapid discharge valve structure 2.

<Configuration of diaphragm pump body>
The diaphragm pump body 1 includes a motor 3, a case 4 to which the motor 3 is fixed, a drive mechanism 5 accommodated in the case 4, a diaphragm holder 6 disposed on the case 4, and a diaphragm holder 6 And a diaphragm 7 held on the surface.

  The case 4 is a bottomed cylindrical member made of, for example, resin. The case 4 is open at the top, and the motor 3 is fixed to the outside of the bottom of the substantially square shape in plan view. The output shaft 3 a of the motor 3 is inserted into the case 4 through a hole 4 a formed in the bottom of the case 4.

  The drive mechanism 5 includes a crank base 51 made of a substantially cylindrical member made of, for example, resin, which is fixed to the output shaft 3a of the motor 3, and an axis line of the output shaft 3a at a portion eccentric from the output shaft 3a of the crank base 51. A drive shaft 52 having one end fixed in a state inclined with respect to the direction, and a drive body 53 in which the other end of the drive shaft 52 is inserted into the non-through hole 53c are provided. That is, the driving body 53 is pivotally supported with respect to the driving shaft 52.

  The driving body 53 is a member made of, for example, resin, and a pair of driving elements 53b extending from one end of the columnar base 53a in a direction perpendicular to the axis of the base 53a is formed. In such a drive body 53, the other end portion of the drive shaft 52 is inserted into a hole 53c formed in the bottom surface of the base portion 53a, and a piston 72 of the diaphragm 7 to be described later is inserted into a locking hole 53d formed in the drive element 53b. The integrally formed convex portion 73 is engaged.

  Therefore, when the motor 3 is driven to rotate the output shaft 3a, the drive shaft 52 rotates with the crank base 51 in an inclined state, so that the pair of driver elements 53b of the driving body 53 and the driver elements 53b are engaged. The piston 72 reciprocates in the vertical direction in the figure. Thus, the drive mechanism 5 converts the rotational motion of the motor 3 into the reciprocating motion of the piston 72 in the vertical direction.

  The diaphragm holder 6 is a ceiling-shaped member made of, for example, resin. The top plate of the diaphragm holder 6 is formed with two holding holes 61 that are spaced apart from each other by 180 ° in the circumferential direction with the central portion 6a interposed therebetween in plan view. In this holding hole 61, a diaphragm portion 71 of a diaphragm 7 described later is held.

  The diaphragm 7 is formed of a flexible material such as rubber, and includes two hemispherical diaphragm portions 71 spaced apart from each other by 180 degrees in the circumferential direction in a plan view, and the two diaphragm portions 71. A flange 7a formed in a substantially quadrangular shape in plan view connecting the upper end portions is integrally formed.

  A piston 72 is provided at the top of each diaphragm portion 71, and a locking projection 73 is integrally formed at one end of each piston 72. In addition, a suction valve body 75 is projected from a part of the opening end of each diaphragm portion 71 in the horizontal direction in a state of being integrated with the diaphragm 7.

  Such a diaphragm 7 is inserted into the retaining hole 61 of the diaphragm holder 6 and then pressed into the locking hole 53d of the driving body 53 while elastically deforming the convex part 73 of the diaphragm part 71 after the diaphragm part 71 is inserted into the holding hole 61 of the diaphragm holder 6. It is held by the diaphragm holder 6.

  Thus, the diaphragm holder 6 holding the diaphragm 7 is placed on the upper opening end of the case 4. The case 4 and the diaphragm holder 6 are formed with an internal space for accommodating the drive mechanism 5 and the diaphragm 7, that is, a pump internal space 150 described later as a temporary storage chamber.

<Configuration of the quick exhaust valve structure>
The quick drain valve structure 2 is disposed in the container 9 while being sandwiched between the container 9 constituted by the lower casing 10 and the upper casing 11 and the lower casing 10 and the upper casing 11. And a quick discharge valve 12 provided. The rapid exhaust valve 12 divides the internal space of the container 9 into an input side space 9a on the upper housing 11 side and an output side space 9b on the lower housing 10 side.

  The lower housing 10 is a bottomed cylindrical member made of, for example, resin and having a substantially rectangular shape in plan view, and has an upper surface opened. A cylindrical protrusion 112 is erected on the left end of the lower housing 10 in the figure, and a protrusion formed with a discharge passage 113a connected to the pressurized object is formed on the lower end surface of the protrusion 112. The cylindrical portion 113 is erected in an integrated state with the protruding portion 112.

  A cylindrical partition wall 115 is erected at the outer edge of the upper surface of the lower housing 10, and a cylindrical partition wall 114 is erected at the center of the upper surface of the lower housing 10. The lower housing 10 having such a configuration is placed on the diaphragm 7 so as to sandwich the diaphragm 7 together with the diaphragm holder 6. As a result, a pump chamber 70 is formed by the lower housing 10 and each diaphragm portion 71 of the diaphragm 7.

  Each pump chamber 70 and the input side space 9a of the upper casing 11 are communicated with each other in the partition 114 of the lower casing 10 so as to face each pump chamber 70, and air is supplied from the pump chamber 70 to the input side space 9a. An output passage 81 for outputting is formed.

  On the other hand, in the vicinity of the peripheral edge of the partition wall 114, a suction passage 82 that communicates with each pump chamber 70 and sucks air from the outside is formed. The suction passage 82 is connected to the outside through an inflow passage 82 a (only one is shown) indicated by a broken-line arrow provided in the lower housing 10, and air as gas flows into the pump chamber 70 from the outside. The suction valve element 75 of the diaphragm 7 is located at the opening portion of the suction passage 82, and restricts the backflow of air from the pump chamber 70 to the suction passage 82.

  Further, the rapid exhaust valve structure 2 penetrates all of the lower housing 10, the flange 7 a of the diaphragm 7 and the central portion 6 a of the diaphragm holder 6, and the pump internal space 150 formed inside the diaphragm holder 6 and the case 4. An in-pump exhaust passage 111 that communicates with the output side space 9b of the container 9 is formed. The in-pump exhaust passage 111 has a larger diameter than the exhaust port 213 in the conventional rapid exhaust valve structure 200.

  The upper end surface of the lower housing 10 where the in-pump exhaust passage 111 is formed forms an exhaust valve seat 111a. Air supplied to the pump internal space 150 via the pump exhaust passage 111 is released to the atmosphere through a gap between the motor 3 and the case 4.

  The upper housing 11 is a bottomed cylindrical member made of resin or the like, and the lower surface is opened. On the lower surface of the upper housing 11, a cylindrical check valve seat 107 is erected downward at a position facing the protruding cylindrical portion 113 of the lower housing 10. On the lower surface of the upper housing 11, a convex portion 108 is erected at the center portion thereof, and a cylindrical partition wall 109 is erected at an outer edge portion of the lower surface.

  The rapid drain valve 12 is a valve body that is formed in a plate shape having a substantially square shape in a plan view by an elastic material such as rubber. The rapid exhaust valve 12 includes an exhaust valve body 121 formed at a position facing the exhaust valve seat 111a, discharge valve bodies 125 formed on both sides of the exhaust valve body 121, and a check valve. A structure in which a check valve body 122 formed at a position facing the seat 107, an exhaust valve body 121, a discharge valve body 125, and a support portion 124 provided around the check valve body 122 are integrally formed. have.

  The exhaust valve body 121 includes an exhaust valve body 121a formed in a disc shape that selectively press-contacts the protruding end surface of the convex portion 108 of the upper housing 11 or the exhaust valve seat 111a of the lower housing 10. The exhaust port valve main body 121a is provided around the exhaust port valve main body 121a.

  The exhaust valve body 121a has a rigidity that does not cause distortion when being pressed against the protruding side end surface of the convex portion 108 of the upper housing 11 or the exhaust valve seat 111a of the lower housing 10. It is formed thicker than the exhaust port valve body support part 121b. The exhaust port valve main body support portion 121b is formed in a curved cross section so as to be easily bent. The exhaust valve body 121a of the exhaust valve body 121 is formed in advance so as to be pressed against the projecting side end surface of the convex portion 108 in the upper housing 11 as a default state.

  The discharge valve body 125 outputs the air supplied from each pump chamber 70 to the input side space 9a of the container 9 via the output passage 81, while preventing the inflow of air from the input side space 9a to each pump chamber 70. Functions as a check valve.

  The check valve body 122 is formed in a truncated cone shape protruding downward. The inner diameter of the opening on the lower bottom side, that is, the distal end side of the check valve body 122 is formed to be equal to the outer diameter of the check valve seat 107, and the opening on the proximal end side connected to the upper bottom side, that is, the support portion 124 Is formed larger than the outer diameter of the check valve seat 107. The check valve body 122 constitutes a check valve together with the check valve seat 107, and allows air to flow from the input side space 9a of the container 9 to the output side space 9b, while from the output side space 9b of the container 9 to the input side. This prevents the air from flowing into the space 9a.

  The rapid discharge valve 12 having such a configuration is placed on the upper surface of the lower housing 10 with the check valve body 122 inserted through the check valve seat 107. In this state, the upper housing 11 is placed on the lower housing 10 with the protruding side end surface of the convex portion 108 facing the exhaust valve body 121 a of the exhaust valve body 121.

  In this case, since the support portion 124 of the rapid exhaust valve 12 is supported inside the container 9 while being sandwiched between the upper surface of the lower housing 10 and the lower surface of the upper housing 11, Thus, an input side space 9 a above the sudden exhaust valve 12 and an output side space 9 b below the sudden exhaust valve 12 are formed in the container 9. In the output side space 9b, an air flow path 114a indicated by a broken line is formed in the partition wall 114 of the lower housing 10, and the peripheral space of the check valve seat 107 and the lower space of the exhaust valve main body 121a are formed. Is communicated.

<Operation of the quick exhaust valve integrated diaphragm pump>
In the rapid exhaust valve integrated diaphragm pump 1000 configured as described above, when the motor 3 is driven to rotate the output shaft 3a, the crank base 51 of the drive mechanism 5 also rotates integrally with the output shaft 3a. Since the periphery of the output shaft 3a rotates while the state 52 is inclined, the ends of the two driver elements 53b of the driver 53 reciprocate in the vertical direction in the figure.

  Accordingly, the two diaphragm portions 71 are sequentially reciprocated in the vertical direction as the driver 53b is reciprocated in the vertical direction, and the two pump chambers 70 are alternately expanded and contracted by the deformation of the two diaphragm portions 71 at that time. To do. When the pump chamber 70 expands, the pump chamber 70 enters a negative pressure state, and air is sucked into the pump chamber 70 from the outside through the suction passage 82 (shown by a broken line) of the lower housing 10.

  On the other hand, as shown in FIG. 2, when the pump chamber 70 contracts, the pressure of the air in the pump chamber 70 increases, so that the air in the pump chamber 70 flows from the output passage 81 through the discharge valve body 125. It is supplied to the input side space 9 a of the container 9.

  When air is supplied to the input side space 9 a, the pressure in the input side space 9 a becomes higher than that in the output side space 9 b, so the exhaust port valve body 121 a of the exhaust port valve body 121 becomes the exhaust port valve of the lower housing 10. It is pressed against the seat 111a. As a result, the exhaust valve body 121 closes the in-pump exhaust passage 111. As a result, after the pump exhaust passage 111 and the discharge passage 113a are blocked, the air in the input side space 9a is output from the clearance between the check valve body 122 and the check valve seat 107 to the output side space 9b. It is discharged from a discharge passage 113 to a pressurized object not shown.

  Here, the amount by which the tip of the check valve body 122 is separated from the check valve seat 107 increases in accordance with the flow rate of air supplied from the diaphragm pump main body 1 to the rapid exhaust valve structure 2. Therefore, when the rotation speed of the motor 3 is increased, the speed at which the expansion and contraction of the pump chamber 70 is repeated increases, so that the flow rate of the air supplied to the input side space 9a increases.

  Then, the pressure applied to the distal end portion of the check valve body 122 increases, and the distal end portion of the check valve body 122 is further further separated from the check valve seat 107. As a result, the gap between the check valve body 122 and the check valve seat 107 is increased, so that the flow rate of air passing through the gap increases, and as a result, the air is discharged from the discharge passage 113a to the pressurized object. The air flow rate also increases.

  On the contrary, when the rotational speed of the motor 3 is decreased, the speed at which the expansion and contraction of the pump chamber 70 is repeated decreases, so that the flow rate of the air supplied to the input side space 9a decreases. If it does so, since the pressure concerning the front-end | tip part of the non-return valve body 122 will fall, the front-end | tip part of the non-return valve body 122 will approach the non-return valve seat 107. FIG. As a result, the gap between the check valve body 122 and the check valve seat 107 is reduced, so the flow rate of air passing through the gap is reduced, and as a result, the air is discharged from the discharge passage 113 to the pressurized object. Air flow is also reduced.

  By the way, when the motor 3 is stopped and the supply of air to the input side space 9a of the container 9 is finished, the air supplied to the pressurized object is discharged from the discharge passage 113a to the output side of the container 9 as shown in FIG. The space 9b flows backward at a stretch, and the pressure difference between the pressure in the input side space 9a and the pressure in the output side space 9b becomes small. Thereby, the exhaust port valve body 121a of the exhaust port valve body 121 returns to the default state in which the exhaust port valve body 121a is pressed against the projecting side end surface of the convex portion 108 in the upper housing 11 by its own restoring force.

  The air flowing backward from the pressurized object to the output side space 9b of the container 9 passes through the in-pump exhaust passage 111 from the air flow path 114a (shown by a broken line) of the partition wall 114 and the space below the exhaust port valve body 121a to be pumped. After being temporarily stored in the inner space 150, it is exhausted from the gap between the motor 3 and the case 4 and released to the atmosphere.

  At this time, the air temporarily accumulated in the pump internal space 150 from the output side space 9b of the container 9 is in a state lower than the pressure in the output side space 9b but higher than the atmospheric pressure, and directly from the output side space 9b. Compared to the case where the atmospheric pressure is released, the pressure difference between the pressure in the output side space 9b and the pressure in the pump internal space 150 becomes smaller.

  Thereby, even if the exhaust passage 111 in the pump has a larger diameter than the exhaust port 213 in the conventional quick exhaust valve structure 200, compared to the case where the air in the output side space 9b is opened to the atmosphere, the output side space The pressure difference between the pressure in 9b and the pressure in the pump inner space 150 is small, and a large amount of air that flows backward from the pressurized object passes through the pump exhaust passage 111 from the output side space 9b at a low speed. The influence is reduced, vibration of the exhaust valve body 121 is reduced, and noise is suppressed.

  Furthermore, in this case, since the exhaust valve body 121 is completely accommodated in the container 9 and the pump exhaust passage 111 provided below the exhaust valve body 121 is connected to the pump internal space 150, Even if a slight vibration occurs in the valve body 121, the noise caused by the vibration can be confined in the container 9 of the rapid exhaust valve structure 2 or the diaphragm pump main body 1, thus improving the noise reduction effect as compared with the prior art. Can do. That is, the rapid exhaust valve integrated diaphragm pump 1000 obtains a noise reduction effect that simultaneously brings about a vibration reduction effect on the exhaust valve body 121 and a noise leakage prevention effect that prevents noise leakage due to the vibration of the exhaust valve body 121. Can do.

  It should be noted that the vibration of the diaphragm pump main body 1 and the quick exhaust valve structure 2 when the pump is ON (solid arrow) and the air flow when the pump is OFF (dashed arrow) are simply shown in FIG. The air flow that brings about the reduction effect is summarized.

  When the pump is turned on, air is supplied from the case 4 of the diaphragm pump body 1 to the input side space 9a of the container 9 through the output passage 81 of the lower housing 10 as shown by a solid arrow, After the air is output to the output side space 9b via the air, the air is discharged to the pressurized object 160 via the discharge passage 113a.

  After that, when the pump is OFF, as shown by the broken line arrow, the air of the pressurized object flows back to the output side space 9b of the container 9 through the discharge passage 113a, and the inside of the pump provided below the exhaust valve body 121 After passing through the exhaust passage 111 and exhausted into the pump internal space 150 of the case 4 and temporarily accumulated, it is exhausted from the gap between the motor 3 and the case 4 and released to the atmosphere.

  At this time, the air flowing back from the pressurized object 160 to the output side space 9b is not directly released to the atmosphere from the output side space 9b, but is temporarily released into the pump internal space 150, which is the internal space of the case 4. Exhaust after accumulating, that is, the internal space 150 of the pump is once bypassed and then gradually exhausted from the gap between the motor 3 and the case 4.

Thereby, the pressure difference between the pressure in the output side space 9b and the pressure in the pump inner space 150 is reduced, and the influence of the air passing through the pump exhaust passage 111 from the output side space 9b on the exhaust valve body 121 is reduced. Thus, since the vibration of the exhaust port valve body 121 is reduced, noise is suppressed. Thus, the rapid exhaust valve integrated diaphragm pump 100 with a small and simple configuration with less noise can be realized.

<Other embodiments>
In the above-described embodiment, the exhaust valve body 121a of the exhaust valve body 121 in the rapid exhaust valve 12 is formed in advance so as to be pressed against the protruding end surface of the convex portion 108 in the upper housing 11. However, the present invention is not limited to this, and a compression coil spring (not shown) is provided between the exhaust valve main body 121a and the exhaust valve seat 111a of the lower housing 10. The exhaust valve body 121a may be pressed against the protruding side end surface of the convex portion 108 in the upper housing 11.

Further, in the above-described embodiment, the case where the internal space of the case 4 housing the diaphragm 7 and the drive mechanism 5 is used as the pump internal space 150 as a temporary storage chamber has been described . As the temporary storage chamber, a tank 170 newly provided separately from the case 4 can be used as in the reference example shown in FIG.

  Further, in the above-described embodiment, when the air temporarily accumulated in the pump internal space 150 is exhausted from the gap between the motor 3 and the case 4 through the pump exhaust passage 111 and released to the atmosphere. However, the present invention is not limited to this, and air may be exhausted from the exhaust hole 4b provided at the lower end of the case 4 as shown in FIG.

  Furthermore, in the above-described embodiment, the case where the present invention is applied to the two-cylinder diaphragm pump main body 1 provided with two pump chambers 70 has been described. The present invention may be applied to a cylinder pump body having four or more cylinders.

DESCRIPTION OF SYMBOLS 1 ... Diaphragm pump main body 2,200 ... Rapid exhaust valve structure 3 ... Motor 4 ... Case 4a ... Hole 4b ... Exhaust hole 5 ... Drive mechanism 6 ... Diaphragm holder 7 , 9 ... Container, 9a ... Input side space, 9b ... Output side space, 10 ... Lower housing, 11 ... Upper housing, 12 ... Rapid exhaust valve, 51 ... Crank base, 52 ... Drive shaft, 53 ... Drive body 53, 61 ... holding hole, 70 ... pump chamber, 71 ... diaphragm part, 72 ... piston, 73 ... convex part, 75 ... valve body for suction, 81 ... output passage, 82 ... suction passage, 82a ... inflow passage, 107 ... Check valve seat, 108 ... convex part, 111 ... exhaust passage in pump (exhaust passage), 111a ... exhaust valve seat, 112 ... projecting part, 113 ... projecting cylindrical part, 113a ... discharge passage, 109, 114, 115 ... Partition wall 114a ... Air flow path, 12 ... Exhaust port valve body, 121a ... Exhaust port valve body, 121b ... Exhaust port valve body support part, 125 ... Discharge valve body, 122 ... Check valve body, 124 ... Support part, 150 ... Pump internal space, 160 ... Addition Pressure object, 170 ... tank, 210 ... container, 220 ... valve body, 230 ... spring, 211 ... supply port, 212 ... discharge port, 213 ... exhaust port, 221 ... valve body, 222 ... support part, 214 ... input side Space, 215 ... Output side space, 223 ... Communication passage,
1000 ... Diaphragm pump with integrated quick drain valve.

Claims (1)

A diaphragm having a diaphragm portion forming a pump chamber;
A diaphragm holder for holding the diaphragm;
A drive mechanism for expanding and contracting the pump chamber by deforming the diaphragm portion;
Forming the pump chamber together with the diaphragm portion in a state of being disposed on the diaphragm, an inflow passage through which gas flows into the pump chamber from the outside, an output passage through which gas is output from the pump chamber, and an object to be pressurized A container having a discharge passage for discharging gas and an exhaust passage for exhausting gas inside, and the internal space of the container in communication with the pump chamber via the output passage while being disposed in the container An exhaust port valve that is separated into an input side space and an output side space communicated with the discharge passage and the exhaust passage, and closes the exhaust passage when gas is supplied from the pump chamber to the input side space. An emergency valve structure comprising an emergency valve having a body;
When the gas is no longer supplied from the pump chamber to the input side space, the exhaust valve body opens the exhaust passage to connect the discharge passage and the exhaust passage, and from the pressurized object to the discharge passage. A temporary storage chamber for exhausting the air flowing back to the output side space through the exhaust passage after temporarily storing the air ,
The temporary exhaust chamber integrated diaphragm pump according to claim 1, wherein the temporary storage chamber is an internal space accommodating the diaphragm and the drive mechanism of a case disposed below the diaphragm holder .

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