JP2010077912A - Pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the leak of fluid in a pump chamber from a delivery port when a pump is stopped. <P>SOLUTION: The pump includes the pump chamber 2 driving carried fluid by volume change, a suction port 15a, the delivery port 16a, a drive means 5 driving the pump chamber 2, and at least one check valve 17 (18), and is constructed to shut off the flow of the carried fluid in the pump chamber 2 when the drive means 5 is stopped. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pump device for transporting fluid along a predetermined transport channel, for example.

  Conventionally, as a pump for transporting a fluid to a predetermined transport channel using a diaphragm, for example, a pump chamber formed in the case body and a diaphragm sandwiched in the case body are provided, and the movement (vibration) of the diaphragm There is one that conveys fluid in the pump chamber in a predetermined direction by changing the volume (volume) of the pump chamber according to (see, for example, Patent Document 1).

In the pump chamber of this pump, a suction port and a discharge port (discharge port) for the transport fluid are formed, and a check valve is provided in the suction port and the discharge port. Only to be transported.
Japanese Patent Laid-Open No. 2005-240871

  For example, when a liquid is allowed to flow downward from a pipe connected to the discharge port using a conventional pump, when the pump is stopped, the weight of the fluid remaining in the pipe causes Along with this, the fluid in the pump chamber may flow out from the discharge port through the piping.

  In this case, although the discharge port is sealed by a check valve, this check valve completely prevents the reverse flow of the fluid, but does not function for the forward flow, The self-weight of the fluid in the pipe cannot seal the fluid that flows out of the pump chamber through the discharge port.

  This invention is made | formed in view of such a situation, and makes it a subject to provide the pump which prevents the fluid of a pump chamber from leaking from a discharge port at the time of a pump stop.

  The present invention is to solve the above-described problem, and includes a pump chamber that drives a carrier fluid by a volume change, a suction port, a discharge port, a drive unit that drives the pump chamber, and at least one check. A pump having a valve is configured to block the flow of the carrier fluid in the pump chamber when the driving means is stopped.

  According to this configuration, since the flow of the carrier fluid in the pump chamber is interrupted when the driving unit is stopped, the carrier fluid in the pump chamber can be prevented from leaking from the pump chamber through the discharge port. . The pump is preferably a diaphragm type.

  Further, the pump according to the present invention can employ a configuration having a pressing means for maintaining the state of blocking the flow of the carrier fluid in the pump chamber even when the driving means is stopped.

  According to this configuration, when the driving unit is stopped, the pressing unit can maintain the state where the flow of the carrier fluid is blocked in the pump chamber, and the leakage of the carrier fluid from the pump chamber can be ensured when the pump is stopped. Can be prevented.

  Further, the pump according to the present invention employs a configuration in which the diaphragm has a valve body formed so that a part of the pump chamber blocks a part of the flow path when the driving means of the pump chamber is stopped. it can.

  According to such a configuration, the valve body as a part of the pump chamber blocks a part of the flow path related to the pump chamber, so that the flow of the carrier fluid in the pump chamber is blocked, and when the pump is stopped, the discharge port is interposed. Thus, it is possible to reliably prevent the carrier fluid from leaking from the pump chamber.

  According to the present invention, it is possible to prevent the fluid in the pump chamber from leaking from the discharge port when the pump is stopped.

  The best mode for carrying out the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of a pump 1 according to the present invention. In the first embodiment, the pump 1 includes a case main body 3 for forming a pump chamber 2 therein, a diaphragm (fluid pumping means) 4 that is incorporated in the case main body 3 and that feeds a carrier fluid, and a diaphragm 4. A driving means 5 for driving and a pressing means 6 for pressing the diaphragm 4 in a predetermined direction are provided.

  The pump 1 sucks a predetermined carrier fluid into the pump chamber 2 from the suction port 15a formed at a predetermined position by driving the diaphragm 4 by the driving means 5 to cause a predetermined motion (vibration). The carrier fluid in the pump chamber 2 is discharged through a discharge port 16a formed at a predetermined position.

  The case body 3 includes a first case member 11, a second case member 12, and a third case member 13. The first case member 11 includes a recess 14 for forming the pump chamber 2, a suction portion 15 for sucking the carrier fluid into the pump chamber 2, and a discharge portion 16 for discharging the carrier fluid in the pump chamber 2. Is provided.

  The suction part 15 and the discharge part 16 are configured in a cylindrical shape, and are formed so as to protrude from one surface of the first case member 11 (the surface opposite to the surface on which the recess 14 is formed). The suction part 15 and the discharge part 16 are open at the tip (one end) and communicate with the pump chamber 2 at the base (the other end). The suction port 15 a is formed at the base portion of the suction portion 15, and the discharge port 16 a is formed at the base portion of the discharge portion 16.

  The suction part 15 has a check valve 17 therein. The check valve 17 has a sphere (valve element) 17a and a coil spring 17b as an urging means for urging the sphere 17a. The suction portion 15 allows only the flow of fluid from the suction portion 15 to the pump chamber 2 by the check valve 17 and prevents the fluid from flowing back from the pump chamber 2 to the suction portion 15.

  The discharge part 16 has a check valve 18 therein. The check valve 18 includes a sphere (valve element) 18a and a coil spring 18b as an urging means for urging the sphere 18a, similarly to the check valve 17 of the suction portion 15. The discharge unit 16 allows only a flow of fluid from the pump chamber 2 to the discharge unit 16 by a check valve, and can prevent a reverse flow of fluid from the discharge unit 16 to the pump chamber 2.

  Therefore, the check valves 17 and 18 provided in the suction portion 15 and the discharge portion 16 allow the pump 1 to transport the fluid only in one direction in the order of the suction portion 15, the pump chamber 2, and the discharge portion 16. ing. A predetermined pipe is connected to the suction unit 15 and the discharge unit 16 to form a transport channel for the transport fluid. The pump 1 is provided in the middle part (position) of the transport channel. become. The pump transports the transport fluid in one direction of the transport channel.

  The second case member 12 has a cylindrical shape having a cylindrical portion 19 and a flange portion 20. As shown in FIG. 1, a fixing member 21 for fixing the diaphragm 4 to the first case member 11 is provided in the second case member 12. The fixing member 21 is formed in a cylindrical shape, and one end portion in the cylindrical center direction is fixed with a diaphragm sandwiched between the first case member and the fixing member 21.

  The 3rd case member 13 is comprised by plate shape, and the recessed part 23 which the flange part 20 of the 2nd case member 12 fits is formed in the one surface side. An insertion hole 24 through which the cylindrical portion 19 of the second case member 12 is inserted is formed at a substantially central portion of the third case member 13.

  The case body 3 has the cylindrical portion 19 of the second case member 12 inserted through the insertion hole 24 of the third case member 13, and the third case member 13 and the flange portion 20 of the second case member 12 are overlapped. And the first case member 11 are opposed to each other so as to face each other, and the first case member 11, the second case member 12, and the third case member 13 are integrally connected and fixed. The

  Further, in the case body 3, the diaphragm 4 is fixed to the first case member 11 by sandwiching the radial end portion of the diaphragm 4 between the first case member 11 and the fixing member 21. The pump chamber 2 is mainly constituted by the recess 14 of the case member 11.

  The diaphragm 4 is formed in a circular shape by a stretchable synthetic resin or other elastic body. The diaphragm 4 constitutes a part of the pump chamber 2 as described above, and is driven by the driving means 5 to perform a predetermined motion (vibration), thereby increasing or decreasing the volume of the pump chamber 2. By doing so, the fluid can be sucked into the pump chamber 2 from the suction port 15a side, and the fluid in the pump chamber 2 can be discharged from the discharge port 16a.

  The pump chamber 2 is configured such that the bottom surface of the recess 14 of the first case member 11 and one surface in the thickness direction of the diaphragm 4 face each other. Hereinafter, the wall surface of the pump chamber 2 corresponding to the bottom surface of the recess 14 is referred to as an opposing wall surface 26, and one surface of the diaphragm 4 facing the opposing wall surface 26 is referred to as an inner surface 27.

  In the present embodiment, a solenoid is employed as the driving means 5. The solenoid is a partition for forming a core material 31 that presses the diaphragm 4, an electromagnetic coil 32 that operates the core material 31, a coil spring 33, and a storage space for storing the core material 31 and the electromagnetic coil 32 in the case body 3. The member 34 is included.

  The core material 31 is made of a magnetic material and includes a first component member 35 and a second component member 36. The first component member 35 includes a shaft portion 37 (a cylindrical portion) and a flange portion 38 attached to the diaphragm 4.

  Further, the second component member 36 has a cylindrical portion 41 and a flange portion 42. The shaft portion 37 of the first component member 35 is inserted into the cylindrical portion 41 of the second component member 36, and both are integrated. The inner diameter of the cylindrical portion 41 of the second component member 36 is small on one end side where the flange portion 42 is formed, and is larger on the other end side, and a step is formed in the middle part of the inner surface of the cylindrical portion 41. . The shaft portion 37 of the first component member 35 is in close contact with a portion of the cylindrical portion 41 of the second component member 36 having a small inner diameter. Therefore, a gap 44 is formed between the portion of the cylindrical portion 41 of the second component member 36 having a large inner diameter and the shaft portion 37 of the first component member 35.

  The partition member 34 includes a first partition member 51 and a second partition member 52. The first partition member 51 has a cylindrical portion 53 and a flange portion 54. An electromagnetic coil 32 is wound around the outer periphery of the cylindrical portion 53 of the first partition member 51. The 2nd partition member 52 is comprised by disk shape, and the penetration hole 55 which penetrates the cylinder part 53 of the 1st partition member 51 is formed in the center part. The electromagnetic coil 32 is located between the second partition member 52 and the flange portion 54 of the first partition member 51.

  As shown in FIG. 1, the second component member 36 is inserted into the cylindrical portion 53 of the first partition member 51, and can be reciprocally slid along the axial direction of the cylindrical portion 53. The flange portion 42 of the second component member 36 is provided with an annular cushioning material 61 on the surface facing the flange portion 54 of the first partition member 51. The cushioning member 61 absorbs an impact when the flange portion 42 comes into contact with the flange portion 54 of the first partition member 51 when the second component member 36 is in a reciprocating sliding motion, thereby preventing magnetization. Is for.

  A part of the coil spring 33 is placed in a gap 44 between the first component member 35 and the second component member 36 of the core material 31. One end of the coil spring 33 is in contact with an axially-facing wall surface 63 formed at a stepped portion in the second component member 36. The other end of the coil spring 33 is in contact with the inner wall surface 64 of the second case member 12.

  The coil spring 33 is contracted from the natural length state and is disposed between the core material 31 and the second case member 12 (the inner wall surface 64 of the cylindrical portion 19). Therefore, the coil spring 33 causes the core 31 to move away from the inner wall surface 64 formed in the cylindrical portion 19 of the second case 12, that is, in a direction toward the concave portion 14 of the first case member 11 due to its elastic restoring force. Pressing.

  The driving means 5 is configured to generate the first partition member 51 by the interaction between the electromagnetic force generated when power is supplied to the electromagnetic coil 32 from a driving source (for example, a power source) provided outside the pump 1 and the elastic force of the coil spring 33. In the cylindrical portion 53, the core material 31 is reciprocated with a predetermined stroke. Thereby, the diaphragm 4 connected to the core material 31 can perform a predetermined motion (vibration).

  In the present embodiment, the coil spring 33 used as the drive means 5 functions as a part of the drive means 5 when the pump 1 is in operation, but when the pump 1 is not in operation, the diaphragm 4 is set to a predetermined value. It functions as a pressing means 6 for pressing in the direction.

  Specifically, the coil spring 33 urges the core material 31 toward the pump chamber 2 (concave portion 14) as described above. Therefore, the diaphragm 4 is pressed by the coil spring 33 in a direction (approaching direction) toward the opposing wall surface (the bottom surface of the concave portion 14 of the first case member 11) 26 of the pump chamber 2 facing the diaphragm 4.

  When the pump 1 is not operated, the electromagnetic force of the electromagnetic coil 32 does not act on the core material 31, and the core material 31 is pressed toward the pump chamber 2 side by the elastic restoring force of the coil spring 33, and the pump chamber 2 Move to the side. Accordingly, the diaphragm 4 is pressed by the core material 31 and extends toward the opposing wall surface 26 of the pump chamber 2. The elastic restoring force of the spring is set so as to extend until the inner surface of the diaphragm 4 contacts the opposing wall surface 26. The elastic restoring force of the spring is set to be larger than the elastic restoring force of the diaphragm 4 generated when the inner surface of the diaphragm 4 abuts against the opposing wall surface 26.

  Hereinafter, the operation of the pump 1 configured as described above will be described.

  First, when the pump 1 is operated, the driving means 5 drives the diaphragm 4 to cause a predetermined motion (vibration), and the movement of the diaphragm 4 changes the volume of the pump chamber 2 so that the suction port 15a By sucking the fluid into the pump chamber 2 and discharging the fluid in the pump chamber 2 from the discharge port 16a, the fluid can be conveyed along the flow path connected to the discharge portion 16.

  Further, when the operation of the pump 1 is stopped, the driving means is stopped. That is, since the electromagnetic force of the electromagnetic coil 32 does not act, the core material 31 is pressed by the coil spring 33 and moves in the direction toward the pump chamber 2. At this time, the diaphragm 4 is pressed toward the opposing wall surface 26 of the pump chamber 2 by the core material 31. Thereby, the diaphragm 4 expand | extends and the inner surface of this diaphragm 4 closely_contact | adheres to this opposing wall surface 26 (refer FIG. 3).

  At this time, the inner surface 27 of the diaphragm 4 covers and closes the suction port 15a and the discharge port 16a formed on the opposite wall surface 26 side (hereinafter, this state is referred to as “blocked state”). That is, the inner surface 27 of the diaphragm 4 is a closed surface that closes the suction port 15a and the discharge port 16a when the pump 1 is stopped (when the drive means 5 is stopped) (hereinafter, this closed surface is also denoted by reference numerals). 27). Naturally, the area of the blocking surface 27 is set larger than the opening areas of the suction port 15a and the discharge port 16a. Thus, the diaphragm 4 functions as a pressure feeding unit that pumps the carrier fluid during the pump operation, but when the pump is stopped, a part (blocking surface 27) of the valve body blocks the suction part 15a and the discharge part 16a. Function as.

  When the tire diaphragm 4 is in the closed state, the coil spring 33 as the pressing means 6 has an elastic restoring force larger than the elastic restoring force of the diaphragm 4 in the closed state. (The blocked state of the flow path) is maintained.

  The pump 1 can block the fluid flow in the pump chamber 2 when the pump is stopped by closing the discharge port 16a and the suction port 15a with the closing surface 27 of the diaphragm 4. In other words, the pump 1 has a valve body (diaphragm 4) whose part (blocking surface 27) blocks a part of the flow path of the carrier fluid. Therefore, for example, even when the fluid flows down from the pipe connected to the discharge unit 16, the fluid is prevented from leaking from the pump chamber 2 due to the gravity acting on the fluid remaining in the pipe. it can.

  The check valve 18 provided in the discharge unit 15 has a sphere (valve element) 18a that closes the discharge port 16a from the side opposite to the pump chamber 2 by the biasing means (coil spring) 18b. When the pump 1 is used in a situation where the fluid is dropped from the pipe connected to the discharge unit 16, the negative pressure acting by the dead weight of the fluid (liquid) remaining in the pipe when the pump 1 is stopped The blocking of the discharge port 16a by the check valve 18 is released, and the fluid in the pump chamber 2 leaks to the outside. Therefore, as described above, it is desirable to reliably close the discharge port 16a by the closing surface 27 of the diaphragm 4.

  From another viewpoint, when the pump 1 is stopped, the closing surface (inner surface) 27 of the diaphragm 4 abuts against the opposing wall surface 26 of the pump chamber 2 due to the action of the pressing means 6 (coil spring 33). The volume of the chamber 2 can be made almost zero. That is, at this time, most of the fluid in the pump chamber 2 is discharged from the discharge port 16 a by the movement of the diaphragm 4. Thus, the diaphragm 4 also functions as a discharge means for forcibly discharging almost all of the fluid in the pump chamber 2 from the discharge port 16a after the pump 1 is stopped.

  4 and 5 show a second embodiment of the pump 1 according to the present invention. The pump 1 according to the second embodiment includes a case body 3, a diaphragm 4, a driving unit 5, and a pressing unit 6, as in the first embodiment. The diaphragm 4 is the same as that of the first embodiment, and the drive means 5 is a solenoid in which a core material 31 and an electromagnetic coil 32 are unitized. A connecting member 70 that connects the core material 31 and the diaphragm 4 is provided at one end of the solenoid core material 31.

  The case main body 3 has a first case member 11 and a second case member 12, and does not have the third case member 13 shown in the first embodiment. The first case member 11 is the same as that of the first embodiment. The 2nd case member 12 has the cylinder part 19 and the flange part 20 similarly to 1st Embodiment. The second case member 12 is configured such that the flange portion 20 sandwiches the diaphragm 4 together with the first case member 11. The flange portion 20 is fixed to the first case member 11, so that the diaphragm 4 is the first case member 12. The case member 11 can be fixed.

  A fixing portion 71 for fixing the driving means 5 is formed in the cylindrical portion 19 of the second case member 12. The second case member 12 is configured to fix and support the driving means 5 on the inner surface of the fixing portion 71 through fixing means such as bolts. An insertion hole 72 through which the end portion of the core material 31 of the driving means 5 is inserted is formed at a substantially central portion of the fixing portion 71.

  The pressing means 6 is provided on the cylindrical portion 19 of the second case member 12. In the first embodiment, the coil spring 33 is used as the pressing means 6, but in the second embodiment, a plate-like spring-like elastic body 74 is used. The plate-like spring-like elastic body 74 is provided with an attachment portion 75 for attachment to the cylindrical portion 19 of the second case member 12. The elastic body 74 is in contact with the end portion of the core 31 of the driving means 5 that is inserted through the insertion hole 72 of the fixing portion 71 of the second case member 12 and protrudes. The elastic body 74 is in elastic deformation and is in contact with the end of the core material 31, thereby pressing the core material 31 in the direction toward the pump chamber 2.

  Also in the second embodiment, when the pump 1 is operated, the diaphragm 4 is moved (vibrated) by the driving means 5 so that a predetermined transport fluid can be transported in the order of the suction portion 15, the pump chamber 2, and the discharge portion 16. In addition, when the pump 1 is stopped, the diaphragm 4 is pressed by the pressing means 6, so that the closed surface (inner surface) 27 of the diaphragm 4 is opposed to the pump chamber 2 as in the first embodiment. The suction port 15a and the discharge port 16a are closed by contacting and closely contacting the wall surface 26. Thereby, the fluid in the pump chamber 2 is prevented from leaking from the discharge part 16.

  The other parts of the second embodiment have substantially the same configuration as that of the first embodiment. Elements common to the first embodiment in the second embodiment are denoted by the same reference numerals as those in the first embodiment. , Omit the explanation.

  FIG. 6 shows a pump device 81 using the pump 1 according to the present invention. The pump device 81 includes a pump 1, a fluid tank 82, a drive source (for example, a power source) 83 that drives the pump 1, a timer (not shown), and a case 84 that houses these.

  The case 84 includes a case main body 86 and a cover 87 that can be opened and closed with respect to the case main body 86. The tank 82 is configured in a shrinkable bag shape with synthetic resin or the like. As shown in FIG. 6C, the drive source 83 is disposed at the lower part of the case body 86, and a tank 82 is disposed above the drive source 83 (see FIG. 6B).

  The suction part 15 of the pump 1 and the tank 82 are connected by a connecting pipe 88 so that the liquid stored in the tank 82 can be sucked into the pump chamber 2 through the suction part 15. In addition, an outlet pipe 89 through which the fluid discharged from the pump chamber 2 flows out is connected to the discharge portion 16 of the pump 1. The outflow pipe 89 is inserted through an insertion hole formed through the side wall of the case body 86, and an end portion of the outflow pipe 89 protrudes outside the case body 86. In the pump device 81, the connection pipe 88, the pump 1, and the outflow pipe 89 constitute a conveyance flow path for conveying the fluid in the tank 82 to the end of the outflow pipe 88. The pump device 81 causes the fluid in the tank 82 to flow out from the end portion of the outflow pipe 89 via the pump 1 provided in the middle portion of the transport flow path.

  The timer is attached in the case main body 86 or on the outer surface of the case main body 86, and the pump 1 can be started at regular time intervals or at a set time.

  The pump device 81 is used, for example, as a chemical solution flow down device that causes a chemical solution (liquid) to flow down. That is, for example, a predetermined chemical solution is stored in the tank 82, and this chemical solution flow-down device, for example, removes urine stones attached to a urinal and a urinal water pipe (hereinafter referred to as “urinal etc.”). In order to remove or prevent urine stones or the like from adhering to the urinal or the like, the drug solution can flow along the wall surface of the urinal or the like through the outflow pipe 89 at a predetermined timing. When used in this way, it is desirable for the chemical solution to flow downward from the upper position of the wall surface of the urinal or the like. Therefore, the end portion of the outflow pipe 89 is provided at a position lower than the case, and the end portion thereof. It is desirable to let the chemical solution flow down from the bottom.

  The present invention is not limited to the above embodiment, and various modifications and changes can be made.

  For example, in the above embodiment, the example in which the closing surface (inner surface) of the diaphragm 4 is configured to close the suction port 15a and the discharge port 16a has been shown, but this closing surface closes only the discharge port 16a. In other words, at least the discharge port 16a may be closed.

  In the above embodiment, the coil spring 33 and the leaf spring-like elastic body 74 are exemplified as the pressing means 6, but not limited thereto, for example, a film body formed of a material such as a synthetic resin having elasticity or the like. Various things can be used. The pressing means 6 is not limited to an elastic body, and any means can be used as long as it can press the diaphragm 4 with a required pressure.

  In the above embodiment, the coil springs 17b and 18b are exemplified as the urging means for urging the spheres 17a and 18a of the check valves 17 and 18. However, the present invention is not limited to this, and the force for urging the spheres 17a and 18b is exemplified. The elastic body which has, and other various members can be used.

  In the above embodiment, the diaphragm is exemplified as the means for pumping the carrier fluid in the pump chamber. However, the present invention is not limited to this, and various other means such as a piston may be adopted. In this case, the piston or the like is used as a valve body that closes the suction port and the discharge port by its end face.

  In the above embodiment, a pump provided with two check valves has been illustrated, but the present invention is not limited to this, and one (that is, at least one) check is provided on either the suction port side or the discharge port side. A valve may be provided.

It is sectional drawing of the pump which concerns on 1st Embodiment. It is an assembly drawing of a pump. Similarly, the diaphragm is a cross-sectional view showing a state in which the flow of fluid in the pump chamber 2 is blocked. It is an assembly drawing of the pump which concerns on 2nd Embodiment. It is sectional drawing which similarly shows the state which the diaphragm interrupted | blocked the flow of the fluid in a pump chamber. It is a perspective view which shows the pump apparatus using a pump, (a) is the perspective view, (b) is a perspective view which shows the state which removed the cover from the state of (a), (c) is (b) It is a perspective view which shows the state which removed the liquid tank from the state of this.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Pump, 2 ... Pump chamber, 3 ... Case main body, 4 ... Diaphragm, 11 ... 1st case member, 12 ... 2nd case member, 13 ... 3rd case member, 14 ... Recessed part, 15 ... Inhalation part, 15a ... Suction port, 16 ... discharge portion, 16a ... discharge port, 17 ... check valve, 17a ... spherical body, 17b ... coil spring, 18 ... check valve, 18a ... spherical body, 18b ... coil spring, 19 ... cylindrical portion, 20 ... flange portion , 21 ... fixing member, 23 ... recess, 24 ... insertion hole, 26 ... opposing wall surface, 27 ... inner surface (blocking surface) of diaphragm, 31 ... core material, 32 ... electromagnetic coil, 33 ... coil spring, 34 ... partition member, 35 ... 1st component member 36 ... 2nd component member 37 ... Shaft part 38 ... Flange part 41 ... Tube part 42 ... Flange part 44 ... Crevice 51 ... 1st partition member 52 ... 2nd partition member, 53 ... Cylinder part, 54 ... Flange , 55 ... insertion hole, 61 ... buffer material, 63 ... wall surface, 64 ... inner wall surface of the second case member, 71 ... fixing portion, 72 ... insertion hole, 74 ... leaf spring-like elastic body, 75 ... attachment portion, 81 ... Pump device, 82 ... Tank, 83 ... Drive source, 84 ... Case, 86 ... Case body, 87 ... Cover, 88 ... Connection pipe, 89 ... Outflow pipe

Claims (4)

A pump chamber that drives the carrier fluid by volume change;
A suction port, a discharge port,
Driving means for driving the pump chamber;
A pump having at least one check valve;
A pump characterized in that when the drive means is stopped, the flow of the carrier fluid in the pump chamber is interrupted. A pump chamber that drives the carrier fluid by volume change;
A suction port, a discharge port,
Driving means for driving the pump chamber;
A diaphragm pump having at least one check valve;
A pump characterized in that when the drive means is stopped, the flow of the carrier fluid in the pump chamber is interrupted.   3. The pump according to claim 1, further comprising a pressing unit configured to maintain a state where the flow of the carrier fluid in the pump chamber is interrupted even when the driving unit is stopped.   The pump according to claim 1 or 2, further comprising a valve body formed so that a part of the pump chamber blocks a part of the flow path when the driving means of the pump chamber is stopped.

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