JP2019060289A - Quick exhaust valve integrated type diaphragm pump - Google Patents

Abstract

To provide a quick exhaust valve integrated type diaphragm pump whose manufacturing costs are reduced and assemblability is increased by simplifying a structure for exhausting air in an input side space.SOLUTION: The pump comprises a pump main body part 103 and a quick exhaust valve structure body 104. The quick exhaust valve structure body 104 comprises an input side space 152, a discharge passage 153, an output side space 161, a check valve 166, an exhaust passage 157, and a quick exhaust valve 171 having a valve body 172 for opening/closing an exhaust port 162. The discharge passage 153 is formed so that a passage cross section area is not less than a passage cross section area of a supply passage 151, and is formed to such passage length that a predefined flow path resistance is generated. The predefined flow path resistance is such a flow path resistance that the air is exhausted to the ambient air through the discharge passage 153 when a flow rate of the air passing through the supply passage 151 is not more than a predetermined flow rate, and the quick exhaust valve 171 blocks the exhaust port 162 and the air in the input side space 152 flows into the output side space 161 through the check valve 166, when the flow rate exceeds the predetermined flow rate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rapid exhaust valve integrated diaphragm pump having a rapid exhaust valve that opens when gas supply is stopped.

  Conventionally, as a pump for supplying air to a cuff (arm band) of a sphygmomanometer, as described in, for example, Patent Document 1, a rapid relief valve provided with a rapid exhaust valve for discharging air after the supply of air is stopped There is an exhaust valve integrated diaphragm pump. This conventional diaphragm pump will be described with reference to FIG. The rapid discharge valve integrated diaphragm pump 1 shown in FIG. 4 is constituted by a pump main body 3 attached to the motor 2 and a rapid discharge valve structure 4 attached to the pump main body 3.

The pump body 3 includes a diaphragm 6 forming the pump chamber 5 and a drive mechanism 7 for expanding and contracting the pump chamber 5. The drive mechanism 7 is driven by the motor 2 to convert the rotation of the motor 2 into a reciprocating motion and transmit it to the diaphragm 6.
The rapid exhaust valve structure 4 is mounted on the lower housing 11 with the rubber partition 12 interposed between the lower housing 11 attached to the pump main body 3 and the lower housing 11. And the upper case 13 which is provided.

A suction space 15 connected to the pump chamber 5 via a suction valve 14 and a supply space 17 connected to the pump chamber 5 via a discharge valve 16 between the lower housing 11 and the pump main body 3 And are formed. The suction space 15 is opened to the atmosphere by an inflow passage 18 which penetrates the lower housing 11.
The partition wall 12 divides an input space 21 formed in the lower housing 11 and an output space 22 formed in the upper housing 13. The input space 21 is connected to the supply space 17 through the supply passage 23 penetrating the lower housing 11 and is connected to the suction space 15 through the communication passage 24 penetrating the lower housing 11. ing. The hole diameter of the communication passage 24 is smaller than the hole diameter of the supply passage 23.

Further, the input space 21 is connected to the output space 22 via a check valve 25. The check valve 25 is formed of a cylinder 26 protruding from the upper surface of the lower housing 11 and a cylindrical valve body 27 through which the cylinder 26 passes. The valve body 27 constitutes a part of the partition wall 12. The check valve 25 causes air to flow from the input space 21 to the output space 22.
The output side space 22 is an object to be pressurized (not shown) via a discharge passage 29 in the discharge pipe 28 provided in the upper housing 13 so as to protrude and a hose (not shown) connected to the discharge pipe 28. , And is opened to the atmosphere by the exhaust passage 30 penetrating the upper housing 13.

  A valve seat 32 of the rapid exhaust valve 31 is formed at an opening portion of the exhaust passage 30 in the upper housing 13. The rapid exhaust valve 31 is constituted by the valve seat 32 and a valve body 33 provided on the partition wall 12. The valve 33 is seated on the valve seat 32 in a state where the pressure in the input space 21 is higher than the pressure in the output space 22 and the pressure in the input space 21 is less than or equal to the pressure in the output space 22. Leave from When the valve body 33 is seated on the valve seat 32, the exhaust passage 30 is closed by the valve body 33. Further, when the valve body 33 separates from the valve seat 32, the rapid exhaust valve 31 is opened, and the output side space 22 is opened to the atmosphere via the exhaust passage 30.

In the conventional rapid discharge valve integrated diaphragm pump 1 configured as above, the driving mechanism 7 is driven by the motor 2 and the pump chamber 5 is expanded, so that the atmosphere flows in the inflow passage 18, the suction space 15, It is sucked into the pump chamber 5 through the suction valve 14 and the like. Then, as the pump chamber 5 contracts, air flows from the supply space 17 into the input space 21 through the supply passage 23.
When the amount of air passing through the supply passage 23 is relatively small, the air in the input space 21 is discharged to the atmosphere through the communication passage 24, the suction space 15 and the inflow passage 18.

When the amount of air passing through the supply passage 23 increases, the pressure in the input space 21 becomes higher than the pressure in the output space 22, and the rapid exhaust valve 31 closes, and the air in the input space 21 passes through the check valve 25. Flow to the output space 22. The air having flowed out to the output side space 22 is supplied to the object to be pressurized through the discharge passage 29 and the hose.
When the supply of air to the pressurized object is finished and the motor 2 is stopped, the air in the input space 21 is discharged to the atmosphere through the communication passage 24, the suction space 15, and the inflow passage 18, and the input side The pressure of the space 21 becomes lower than the pressure of the output side space 22. As a result, the rapid exhaust valve 31 is opened, and the air filled between the output side space 22 and the object to be pressurized is exhausted to the atmosphere through the exhaust passage 30.

JP, 2016-41911, A

  In the rapid exhaust valve-integrated diaphragm pump 1 disclosed in Patent Document 1, air is always discharged through the communication passage 24 that connects the input space 21 and the suction space 15. When the inner diameter of the communication passage 24 is larger than the design value, the amount of air leakage increases, and the pump performance is degraded. Further, if the inside diameter is smaller than the design value, the time required for the pressure reduction of the input space 21 after stopping the pump becomes long, and the timing of opening the rapid exhaust valve 31 is delayed.

Therefore, in the rapid exhaust valve integrated diaphragm pump 1 having the communication passage 24, the communication passage 24 must be formed so that the accuracy of the inner diameter is high, so the manufacturing cost of the lower housing 11 becomes high. There was a problem of
Further, in the diaphragm pump 1, since the performance is reduced when dust enters the communication passage 24, it is necessary to work so that a minute foreign matter does not enter the communication passage 24 in the assembly process. That is, in the rapid exhaust valve integrated diaphragm pump 1 of this type, it is required to improve the assemblability.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a rapid exhaust valve integrated diaphragm pump which has a simple structure for discharging air in the input side space to lower the manufacturing cost and high assemblability.

In order to achieve this object, the rapid exhaust valve integrated diaphragm pump according to the present invention comprises a pump body including a diaphragm forming a pump chamber and a drive mechanism for expanding and contracting the pump chamber, and gas from the pump chamber It has a supply passage to be supplied and a discharge passage connected to an object to be pressurized, and has a rapid discharge valve structure attached to the pump body, the rapid discharge valve structure being connected to the supply passage And a discharge passage having one end connected to the input side space and the other end opened to the outer surface of the rapid exhaust valve structure, and the input space separated by a partition wall and the discharge passage And a check valve for flowing the gas in the input space to the output space, one end of which is connected to the output space, and the other end of which is disposed on the outer surface of the rapid exhaust valve structure. Opening waste A passage, and a valve body for opening and closing an exhaust port formed of the one end of the exhaust path, closing the exhaust port in a state where the pressure in the input space is higher than the pressure in the output space, and the input space And a rapid exhaust valve that opens the exhaust port in a state where the pressure of the discharge space is less than or equal to the pressure of the output side space, and the discharge passage is formed such that the passage cross sectional area is equal to or greater than the passage cross sectional area of the supply passage. In addition, the flow path resistance which is determined in advance is formed in a passage length which causes the flow rate of the gas passing through the supply passage to be equal to or less than a predetermined flow rate. Is discharged into the atmosphere through the discharge passage, and when the flow rate of the gas passing through the supply passage exceeds the predetermined flow rate, the rapid exhaust valve closes the exhaust port and the gas in the input space Is the output side space through the check valve It is those wherein the flow path resistance to flow.
The present invention, in the rapid discharge valve integrated diaphragm pump, further includes: a first case forming the input side space in cooperation with the partition; and the partition separated from the first casing. And a second case that cooperates to form the output side space, and the discharge passage is formed by a recessed groove opened in a mating surface of the first case with the second case. It may be

  In the rapid exhaust valve integrated diaphragm pump according to the present invention, when the flow rate of the gas passing through the supply passage is equal to or less than the predetermined flow rate, the gas is discharged from the input side space through the discharge passage. When the flow rate of the gas passing through the supply passage exceeds a predetermined flow rate, the gas flows out from the input space through the check valve to the output space despite the air being discharged from the discharge passage. Therefore, although the gas is always discharged from the discharge passage, the gas can be reliably supplied to the object to be pressurized.

After stopping the pump, the gas in the input space is immediately exhausted through the exhaust passage. For this reason, the rapid exhaust valve opens quickly, and air can be rapidly exhausted from the object to be pressurized.
The passage cross-sectional area of the discharge passage is equal to or greater than the passage cross-sectional area of the supply passage. Therefore, the discharge passage can be easily formed. In addition, even if fine dust adheres to the discharge passage at the time of assembly, the air flowing through the discharge passage is cleaned by the air flowing through the discharge passage during the operation of the pump. As a result, it is not necessary to work so that a minute foreign object does not enter in the discharge passage in the assembly process.

  Therefore, according to the present invention, it is possible to provide a rapid exhaust valve integrated diaphragm pump which has a simple structure for discharging the air in the input side space to lower the manufacturing cost and high assemblability.

FIG. 1 is a cross-sectional view of a rapid exhaust valve integrated diaphragm pump according to the present invention. It is sectional drawing which expands and shows a rapid exhaust valve structure. It is a top view which expands and shows the principal part of a lower side case. It is sectional drawing of the conventional rapid discharge valve integrated diaphragm pump.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a rapid exhaust valve integrated diaphragm pump according to the present invention will be described in detail with reference to FIGS.
The rapid discharge valve integrated diaphragm pump 101 shown in FIG. 1 is attached to a motor 102 positioned at the lowermost position in FIG. 1 and driven by the motor 102 to operate. The rapid exhaust valve-integrated diaphragm pump 101 according to this embodiment is a pump that sucks and discharges air. In this embodiment, air corresponds to the "gas" in the present invention.
The rapid exhaust valve integrated diaphragm pump 101 includes a pump main body 103 fixed to a motor 102 and a rapid exhaust valve structure 104 attached to the pump main body 103.

<Configuration of Pump Main Body>
The pump main body portion 103 is configured of a housing 105 fixed to the motor 102 and a plurality of functional components held by the housing 105.
The housing 105 is formed in a cylindrical shape by combining a plurality of members in the axial direction (vertical direction in FIG. 1) of the motor 102, and is positioned coaxially with the rotation shaft 106 of the motor 102.

  A plurality of members constituting the housing 105 are a bottomed rectangular cylindrical bottom body 111 fixed to the motor 102 by a fixing bolt 107, a diaphragm holder 112 attached to the opening of the bottom body 111, and the diaphragm It is a disk-shaped valve holder 114 or the like attached to the diaphragm holder 112 in a state where a diaphragm 113 described later is sandwiched between the holder 112 and the like.

The diaphragm 113 is held between the diaphragm holder 112 and the valve holder 114. In addition, the diaphragm 113 has a plurality of cup-like deformed portions 115 that open toward the valve holder 114. The deformation portions 115 are provided at positions dividing the diaphragm 113 into a plurality of parts in the circumferential direction of the housing 105. Also, these deformed portions 115 are inserted into the holes 112 a formed in the diaphragm holder 112.
The opening portion of the deformation portion 115 is closed by the valve holder 114. Further, a plate-like suction valve body 116 projecting integrally with the valve holder 114 toward the inward of the deformation portion 115 is integrally formed at the opening of each deformation portion 115.

A pump chamber 117 is formed between the deformed portion 115 and the valve holder 114. Thus, the diaphragm 113 cooperates with the valve holder 114 to form the pump chamber 117.
A piston 118 is provided at the bottom of the cup-shaped deformation portion 115, and a connecting piece 119 is provided which protrudes in the opposite direction to the pump chamber 117. The connection piece 119 is connected to a drive body 122 of a drive mechanism 121 described later.

A suction passage 123 and an output passage 124 are bored in a portion constituting a wall of the pump chamber 117 in the valve holder 114. The suction passage 123 is provided on the outer edge side of the valve holder 114 so as to overlap with the suction valve body 116 described above. The opening on the pump chamber 117 side of the suction passage 123 is opened and closed by a suction valve body 116.
The output passage 124 is provided on the center side of the valve holder 114.

  A discharge valve body 125 is attached to an end face of the valve holder 114 opposite to the pump chamber 117. The discharge valve body 125 has a base portion 125a attached to a protrusion 114a provided in the center of the valve holder 114 and a valve body portion 125b for each pump chamber 117 projecting from the base portion 125a along the valve holder 114. have. The valve body portion 125 b is opposed to the opening of the output passage 124 opposite to the pump chamber 117. The opening of the output passage 124 is opened and closed by the valve body portion 125 b.

  The discharge valve body 125 and the suction valve body 116 described above open and close as the volume of the pump chamber 117 increases and decreases. The discharge valve body 125 opens in the contraction stroke in which the volume of the pump chamber 117 decreases, and is closed otherwise. The suction valve body 116 opens in the expansion stroke in which the volume of the pump chamber 117 increases, and is closed otherwise. The volume of the pump chamber 117 is changed by the piston 118 of the diaphragm 113 being pushed or pulled by a drive mechanism 121 described later.

The drive mechanism 121 includes a crank body 131 attached to a rotation shaft 106 of the motor 102, a drive body 122 connected to the crank body 131 via a drive shaft 132, and the like. The crank body 131 is formed in a cylindrical shape and is fixed to the rotating shaft 106. For this reason, the crank body 131 rotates integrally with the rotating shaft 106.
One end of the drive shaft 132 on the side of the crank body 131 is fixed to a portion of the crank body 131 eccentric to the rotation shaft 106 and supported by the crank body 131 and is inclined in a predetermined direction with respect to the rotation shaft 106 .

The driving body 122 is constituted by a cylindrical shaft portion 133 rotatably supported by the driving shaft 132 and a plurality of arm portions 134 protruding outward in the radial direction from the shaft portion 133.
The arm portion 134 is provided for each of the deformed portions 115 of the diaphragm 113, and extends radially outward from the shaft portion 133 in the radial direction. A through hole 134 a is bored in the arm portion 134. The connecting piece 119 of the diaphragm 113 is engaged with the through hole 134a. The connecting piece 119 is fixed to the arm 134 in a state of penetrating the arm 134.
According to this drive mechanism 121, when the crank body 131 and the drive shaft 132 rotate together with the rotary shaft 106 of the motor 102, the drive body 122 swings to expand and contract the pump chamber 117.

<Configuration of rapid exhaust valve structure>
The rapid exhaust valve structure 104 includes a lower case 141 attached to the valve holder 114, an upper case 142 attached to the lower case 141 in an overlapping manner, and the lower case 141 and the upper case. It is comprised by the partition 143 pinched | interposed and hold | maintained with the body 142. As shown in FIG. In this embodiment, the lower case 141 corresponds to the "first case" in the present invention, and the upper case 142 corresponds to the "second case" in the present invention.

The lower housing 141 has an outer cylindrical body 144 and an inner cylindrical body 145 protruding toward the valve holder 114, and a cylinder 146 protruding toward the opposite side to the valve holder 114. The lower housing 141 is molded into a predetermined shape by a mold (not shown) using a plastic material.
The outer cylindrical body 144 is provided at the outer edge portion of the lower housing 141. The inner cylindrical body 145 is provided inside the outer cylindrical body 144. The protruding ends of the outer cylindrical body 144 and the inner cylindrical body 145 are fixed to the valve holder 114 in an airtight manner.

  A suction space 147 is formed between the outer cylindrical body 144 and the inner cylindrical body 145. The suction space 147 is formed so as to be surrounded by the outer edge portion of the lower housing 141 including the outer cylindrical body 144 and the inner cylindrical body 145 and the outer edge portion of the valve holder 114. The aforementioned suction passage 123 communicates the suction space 147 with the pump chamber 117. Further, the suction space 147 is in communication with the atmosphere by the inflow passage 148 penetrating the outer cylindrical body 144.

  Inside the inner cylindrical body 145, a supply space 149 is formed. The supply space 149 is formed to be surrounded by the central portion including the inner cylindrical body 145 of the lower housing 141 and the central portion of the valve holder 114. The output passage 124 described above communicates the supply space 149 with the pump chamber 117. Also, the discharge valve body 125 is accommodated in the supply space 149.

  A supply passage 151 is bored in a central portion of the lower housing 141 and in a portion constituting a wall of the supply space 149. One end of the supply passage 151 is open to the supply space 149, and the other end is open to the input side space 152 formed between the lower housing 141 and a partition 143 described later. The supply passage 151 is supplied with gas from the pump chamber 117 through the output passage 124 and the supply space 149.

The cylinder 146 is provided on one side (the left side in FIG. 1) of the lower housing 141.
A discharge passage 153 is formed on the other side of the lower housing 141 and on the end surface opposite to the valve holder 114. As shown in FIG. 3, the discharge passage 153 is formed by a concave groove opened in a mating surface 141 a of the lower housing 141 with the upper housing 142. The passage cross-sectional area of the discharge passage 153 is equal to or greater than the passage cross-sectional area of the supply passage 151. Further, the passage length of the discharge passage 153 is longer than the passage length of the supply passage 151, and is a passage length in which a predetermined flow passage resistance occurs. The description of this flow path resistance will be described later.

As shown in FIGS. 1 and 2, the upper housing 142 has a discharge cylindrical portion 154 and an exhaust cylindrical portion 155 protruding toward the side opposite to the lower housing 141, and the partition 143 described later has The lower housing 141 is airtightly attached to the lower housing 141 in a state of being sandwiched between the lower housing 141 and the lower housing 141.
The discharge cylindrical portion 154 is provided at a position facing the cylinder 146 of the lower housing 141.

  The discharge cylindrical portion 154 according to this embodiment is formed of a large diameter portion 154 a covering the cylinder 146 of the lower housing 141 and a small diameter portion 154 b projecting from the large diameter portion 154 a. In this embodiment, a discharge passage 156 is formed inside the discharge cylindrical portion 154. One end of an air supply hose (not shown) is connected to the small diameter portion 154b. A pressure target (not shown) is connected to the other end of the air supply hose.

  The exhaust cylindrical portion 155 is formed to be a double cylinder having an inner cylinder 155a and an outer cylinder 155b. An exhaust passage 157 is formed at the center of the inner cylinder 155a. One end of the exhaust passage 157 opens as an exhaust port 162 into an output side space 161 formed between the upper housing 142 and a partition 143 described later. The other end of the exhaust passage 157 opens to the upper surface of the upper housing 142 (the outer surface of the rapid exhaust valve structure 104).

  The partition wall 143 is formed in a plate shape by an elastic material such as rubber, and partitions between the lower housing 141 and the upper housing 142. The input side space 152 formed between the partition wall 143 and the lower housing 141 is connected to the supply passage 151 of the lower housing 141. The upstream end (left end in FIG. 1) of the discharge passage 153 described above is the input side by the gap 164 (see FIG. 3) formed between the partition wall 143 and the rapid exhaust valve support seat 163 of the lower housing 141. It is connected to the space 152. The downstream end of the discharge passage 153 opens to the outer surface of the lower housing 141 (the outer surface of the rapid exhaust valve structure 104).

The output side space 161 formed between the partition 143 and the upper housing 142 is separated from the input side space 152 by the partition 143. The output side space 161 is connected to the discharge passage 156 and the exhaust passage 157 provided in the upper housing 142.
A cylindrical valve body 165 protruding toward the upper housing 142 is provided on one side (the left side in FIG. 1) of the partition wall 143. The cylindrical valve body 165 constitutes a check valve 166 in cooperation with the cylinder 146 of the lower housing 141.

  The check valve 166 causes the air in the input space 152 to flow to the output space 161. The cylinder 146 constitutes a valve seat of the check valve 166. The cylindrical valve body 165 is formed in a cylindrical shape covering the outer peripheral surface of the cylinder 146. The projecting end of the cylindrical valve body 165 is in close contact with the outer peripheral surface of the cylinder 146 over the entire circumferential direction. The proximal end portion of the cylindrical valve body 165 is formed to have a diameter larger than that of the cylinder 146. The space between the cylindrical valve body 165 and the cylinder 146 is a part of the input space 152.

Further, as shown in FIG. 2, the partition wall 143 is provided with a valve body 172 of the rapid exhaust valve 171. The rapid exhaust valve 171 is composed of a valve body 172 and a valve seat 173 formed on the inner cylinder 155 a of the above-described exhaust cylindrical portion 155.
The valve body 172 is configured of an annular support portion 172a formed relatively thin, and a plate-like portion 172b located at the center of the support portion 172a. The plate-like portion 172 b of the valve body 172 moves in accordance with the pressure of the input space 152 and the pressure of the output space 161, and contacts and separates from the valve seat 173.

  When the pressure in the input side space 152 is higher than the pressure in the output side space 161, the valve body 172 is seated on the valve seat 173 and closes the exhaust port 162 as shown in FIG. When the pressure in the input space 152 is less than or equal to the pressure in the output space 161, as shown in FIG. 1, the valve body 172 separates from the valve seat 173, the exhaust port 162 opens, and the plate portion 172b lowers. The rapid exhaust valve support seat 163 of the side case 141 is in contact with the side case 141.

<Description of operation of rapid discharge valve integrated diaphragm pump>
When the rotation shaft 106 of the motor 102 rotates, the crank body 131 and the drive shaft 132 rotate around the rotation shaft 106, and the arm portion 134 of the driver 122 pushes or pulls the piston 118 of the diaphragm 113. As the piston 118 is pulled by the arm 134, the pump chamber 117 is expanded and the suction valve body 116 is opened, and the atmosphere is sucked from the inflow passage 148 through the suction space 147 and the suction passage 123 into the pump chamber 117. Ru. On the other hand, when the piston 118 is pushed by the arm portion 134, the pump chamber 117 is contracted and the discharge valve body 125 is opened, and the air in the pump chamber 117 is the output passage 124, the supply space 149, and the supply passage 151, Flows into the input side space 152.

  The input space 152 is open to the atmosphere via the discharge passage 153. Therefore, the air flowing into the input side space 152 is discharged to the atmosphere through the exhaust passage 157 while receiving the flow resistance of the discharge passage 153. The maximum flow rate of air exhausted through the exhaust passage 153 is limited by the flow path resistance of the exhaust passage 153. The flow path resistance is set such that the entire amount of air is discharged through the discharge passage 153 when the flow rate of air flowing into the input space 152 through the supply passage 151 is less than or equal to a predetermined flow rate. ing. The “predetermined flow rate” is appropriately set in accordance with the discharge amounts of all the pump chambers 117.

  If the flow rate of air passing through the supply passage 151 exceeds the above-described predetermined flow rate, the air can not be discharged only by the discharge passage 153, and the pressure in the input space 152 rises. In this case, the rapid exhaust valve 171 closes the exhaust port 162 as the pressure in the input side space 152 rises. Then, as shown in FIG. 2, the cylindrical valve body 165 of the check valve 166 is opened, and the air in the input space 152 flows out to the output space 161 through the check valve 166.

  That is, when the flow rate of the air passing through the supply passage 151 is less than a predetermined flow rate, the flow passage resistance of the discharge passage 153 is such that the entire amount of this air is discharged from the discharge passage 153 and the flow rate of the air passing through the supply passage 151 is predetermined. The rapid exhaust valve 171 closes the exhaust port 162 and the air in the input space 152 flows out to the output space 161 through the check valve 166.

  The air having flowed out to the output side space 161 is supplied from the discharge cylindrical portion 154 of the upper housing 142 through a hose (not shown) to the object to be pressurized. Therefore, according to the rapid exhaust valve integrated diaphragm pump 101, although the air is always discharged from the discharge passage 153, the air can be reliably supplied to the object to be pressurized. .

  When the motor 102 is stopped and the pump is stopped, air is not supplied to the input space 152 from the supply passage 151. Thus, the compressed air in the input space 152 is immediately discharged to the atmosphere through the discharge passage 153. Along with this, the pressure of the input side space 152 quickly becomes equal to or less than the pressure of the output side space 161, and as a result, the rapid exhaust valve 171 opens quickly, and air from the pressurized object passes through the output side space 161 quickly. Will be discharged into the

<Description of the effect by embodiment>
In the rapid exhaust valve integrated diaphragm pump 101 according to this embodiment, the passage cross-sectional area of the discharge passage 153 is equal to or larger than the passage cross-sectional area of the supply passage 151. Therefore, the discharge passage 153 can be easily formed. Further, even if minute dust adheres to the discharge passage 153 at the time of assembly, the air flowing through the discharge passage 153 cleans the discharge passage 153 at the time of pump operation. For this reason, since a problem does not occur even if a minute foreign object may enter the discharge passage 153 in the assembly process, the assembly operation becomes easy.
Therefore, according to this embodiment, it is possible to provide a rapid exhaust valve integrated diaphragm pump having a simple structure to discharge air in the input side space 152 and a low manufacturing cost and high assemblability. .

The rapid exhaust valve integrated diaphragm pump 101 according to this embodiment is overlapped with the lower case 141 (first case) forming the input side space 152 in cooperation with the partition 143 and the lower case 141. And an upper housing 142 (second housing) that forms the output side space 161 in cooperation with the partition wall 143. The discharge passage 153 is formed by a recessed groove opened in the mating surface 141 a of the lower housing 141 with the upper housing 142.
Therefore, since the discharge passage 153 can be formed using a mold for molding the lower housing 141, it is possible to provide a rapid exhaust valve integrated diaphragm pump whose manufacturing cost is further lowered.

In the embodiment described above, an example is shown in which the discharge passage 153 is formed by a recessed groove. However, the discharge passage 153 can also be formed by a hole.
In the embodiment described above, the rapid exhaust valve integrated diaphragm pump 101 having two pump chambers 117 has been described. However, the present invention can also be applied to a rapid exhaust valve integrated diaphragm pump having one or more pump chambers.

  DESCRIPTION OF SYMBOLS 101 ... rapid discharge valve integrated type diaphragm pump, 103 ... pump main-body part, 104 ... rapid discharge valve structure, 113 ... diaphragm, 117 ... pump chamber, 121 ... drive mechanism, 141 ... lower case (1st case , 141a: mating surface, 142: upper case (second case), 143: partition wall, 151: supply passage, 152: input side space, 153: discharge passage, 156: discharge passage, 157: exhaust passage, 161 ... output side space, 162 ... exhaust port, 166 ... check valve, 171 ... quick exhaust valve, 172 ... valve body.

Claims (2)

A pump body including a diaphragm forming a pump chamber and a drive mechanism for expanding and contracting the pump chamber;
And a rapid discharge valve structure attached to the pump body portion, having a supply passage to which gas is supplied from the pump chamber, and a discharge passage connected to an object to be pressurized.
The quick release valve structure is
An input side space connected to the supply passage;
A discharge passage having one end connected to the input space and the other end open to the outer surface of the quick release valve structure;
An output side space separated from the input side space by a partition wall and in communication with the discharge passage;
A check valve for flowing the gas in the input space into the output space;
An exhaust passage having one end connected to the output side space and the other end open to the outer surface of the rapid exhaust valve structure;
The valve has a valve body for opening and closing an exhaust port formed of the one end of the exhaust passage, the exhaust port is closed when the pressure in the input space is higher than the pressure in the output space, and the pressure in the input space is And a rapid exhaust valve that opens the exhaust port at a pressure equal to or less than the pressure of the output side space,
The discharge passage is formed to have a passage cross-sectional area equal to or larger than the passage cross-sectional area of the supply passage, and is formed to have a passage length which causes a predetermined flow passage resistance,
The predetermined flow path resistance is
When the flow rate of the gas passing through the supply passage is equal to or less than a predetermined flow rate, the gas supplied to the input space is exhausted to the atmosphere through the discharge passage;
When the flow rate of the gas passing through the supply passage exceeds the predetermined flow rate, the rapid exhaust valve closes the exhaust port, and the gas in the input space passes through the check valve to the output space. A rapid exhaust valve integrated diaphragm pump characterized in that it is a flow path resistance flowing out. In the rapid discharge valve integrated diaphragm pump according to claim 1,
further,
A first case that cooperates with the partition to form the input space;
And a second case that is superimposed on the first case and cooperates with the partition to form the output side space.
The rapid exhaust valve integrated diaphragm pump characterized in that the discharge passage is formed by a recessed groove opened in a mating surface with the second housing in the first housing.

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