JP5913966B2 - Diaphragm pump - Google Patents

Description

  The present invention relates to a diaphragm pump that mixes different fluids and supplies them to a pressurized object.

  When mixing different fluids and supplying them to pressurized objects, prepare multiple diaphragm pumps that supply different fluids individually, and mix the fluid discharged from the outlets of the individual diaphragm pumps in one pipe. I was trying to let them.

  In the conventional method as described above, since a plurality of diaphragm pumps must be prepared, there is a problem that not only the cost increases, but also an installation space is required.

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to achieve cost reduction and space saving.

To achieve this object, the present invention provides at least one pump chamber that expands and contracts, a suction passage provided in the pump chamber for sucking fluid into the pump chamber, and opening and closing the suction passage to open the pump chamber. A suction valve element that restricts the backflow of fluid from the pump, a discharge passage that is provided in the pump chamber for discharging fluid from the pump chamber, and opens and closes the discharge passage to restrict the backflow of fluid into the pump chamber In a diaphragm pump comprising a discharge valve body, a suction port for allowing fluid to be sucked into the suction passage from the outside, and a single discharge port for discharging the fluid discharged from the discharge passage to the outside, A diaphragm having a diaphragm portion that reciprocates when driven by a motor, a diaphragm holder that holds the diaphragm, and the discharge passage are provided with the diaphragm. And a partition wall body forming the pumping chamber in Part cooperation with a plurality of suction passages provided, the plurality of suction passages to inhale different fluid to at least one pump chamber of said pump chamber A first suction passage provided in the partition wall and a second suction passage provided in the diaphragm holder, wherein the suction valve body opens and closes the first suction passage. A suction valve body and a second suction valve body which is integrally formed with the diaphragm and opens and closes the second suction passage, and the second suction valve is interposed between the diaphragm holder and the partition wall body. A communication passage through which the service passage and the pump chamber communicate is provided .

  According to the present invention, since different types of fluids can be mixed in one pump chamber, the number of diaphragm pumps conventionally required only for the type of fluid can be reduced, thereby reducing the number of pumps. Therefore, cost reduction and space saving can be achieved. Moreover, since it can respond with one pump, parts replacement becomes easy and maintenance property is also improved.

It is a top view of the diaphragm pump concerning the present invention. It is the II-II sectional view taken on the line in FIG. It is the III-III sectional view taken on the line in FIG. It is the IV-IV sectional view taken on the line in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. Note that “upper and lower” used to describe the direction in the specification refers to the direction in the figure for the sake of convenience of explanation, and is the upper and lower when actually using the diaphragm pump according to the present invention. The bottom does not necessarily match.

  The diaphragm pump generally indicated by reference numeral 1 in FIG. 2 includes a motor 2 as a drive source. The motor 2 is attached to the outside of the bottom portion 3a of the case 3 formed in a bottomed rectangular tube shape by a bolt so that the output shaft 2a faces the case 3 from a shaft hole provided in the bottom portion 3a. In addition, an opening 3 b as a second suction port is provided on the lower side of the case 3.

  Reference numeral 4 denotes a crank that is formed in a substantially cylindrical shape, and is provided with a non-through hole 4a that extends in the vertical direction at the center of the bottom surface and into which the output shaft 2a of the motor 2 is press-fitted. The upper surface of the crank 4 has a ring shape in plan view that extends in the circumferential direction around the non-through hole 4a (the rotation axis of the crank 4), and is formed so that the cross-sectional area increases upward. A groove 5 is provided. By rotating the crank 4 at the bottom of the engaging groove 5, a lower end portion of a driving protrusion 9 a to be described later engaged in the engaging groove 5 is engaged, and the driving protrusion 9 b is rotated by the rotation of the crank 4. An engaging portion 5 a that rotates following the rotation is formed integrally with the crank 4. Further, a guide portion 6 formed in a conical shape is provided upright at a portion surrounded by the engaging groove 5 on the upper surface of the crank 4, that is, at the center of the upper surface of the crank 4.

  Reference numeral 7 denotes a driving body, and four driving elements 7a projecting radially from the central portion in the horizontal direction are integrally provided at an equal angle (90 °) to each other in the circumferential direction in plan view. . Diaphragm portion mounting holes 7b are provided at the respective swing end portions of the driver elements 7a.

  Further, a support protrusion 8 for a swinging fulcrum whose upper end portion is formed in a hemispherical shape is projected upward from the center of the upper surface of the drive body 7. Furthermore, in the center part of the lower surface of the drive body 7, the support part 9 formed in the column shape, and the small diameter drive protrusion provided in the lower part side of this support part 9, and the lower end part formed hemispherical. 9a is provided integrally.

  Reference numeral 10 denotes a diaphragm holder which is formed in an inverted bottomed rectangular tube shape and holds a diaphragm 12 which will be described later. A concave portion which supports the support protrusion 8 in a tiltable and rotatable manner at the center of the lower surface of the ceiling portion 11. 11a is formed. In the ceiling portion 11, four circular insertion holes 11 b (only one insertion hole 11 b is shown) corresponding to a recess 13 a of the partition wall 13 described later are equiangular (90 °) in the circumferential direction in plan view. ) Is provided. In addition, four second suction passages 11A to 11D are provided at the peripheral edge of the ceiling portion 11 at an equal angle (90 °) in the circumferential direction in a plan view as shown in FIG. Yes.

  Reference numeral 12 denotes a diaphragm formed in a rectangular shape by a flexible material such as rubber, and the four diaphragm portions 12a formed in a thin shape are equiangular (90 °) with respect to each other in the circumferential direction in plan view. Is provided. A piston portion 12b is integrally provided at a lower portion of the diaphragm portion 12a, and a small diameter portion 12c is integrally provided at a lower end of the piston portion 12b. Further, on the peripheral edge of the diaphragm 12, four second suction valve bodies 12A to 12D formed in a thin shape are equiangular (90 ° to each other in the circumferential direction in a plan view as shown in FIG. ) And is provided integrally with the diaphragm 12.

  Reference numeral 13 denotes a partition body as a valve holder formed in a flat and substantially prismatic shape, and four concave portions formed on the lower surface are formed in a circular shape in a plan view as shown in FIG. They are provided at equal angles (90 °) to each other in the circumferential direction. Further, on the lower surface of the partition wall 13, there are four second recesses 13 b formed in four small diameters at positions between adjacent first recesses 13 a and corresponding to the second suction passages 11 </ b> A to 11 </ b> D. Are provided at equal angles (90 °) to each other in the circumferential direction in plan view. And each 1st recessed part 13a is connected with the adjacent 2nd recessed part 13b by each communicating path 13A-13D provided in the partition body 13 as shown in FIG.

  In the upper part of the partition wall 13, four discharge passages 13d communicating with the first recess 13a are provided at equal angles (90 °) in the circumferential direction in plan view as shown in FIG. Yes. In addition, four sets of first suction passages 13e, each of which is a set of six communicating with the first recess 13a, are formed on the upper portion of the partition wall 13 in plan view corresponding to the radial direction of the discharge passage 13d. Are provided at equal angles (90 °) to each other in the circumferential direction. On the upper surface of the partition wall 13, a ring-shaped partition wall 13f located between the first suction passage 13e and the discharge passage 13d is integrally provided upright. In addition, an enclosing wall 13g is integrally provided on the entire periphery of the peripheral edge of the upper surface of the partition wall 13, and an engaging convex portion 13h is integrally protruded at the center.

  Reference numeral 14 denotes one discharge valve body attached to the engaging convex portion 13h and formed in a hat shape for opening and closing the discharge passage 13d. The discharge valve body 14 discharges fluid from the discharge space 18 described later into the pump chambers 16A to 16D. Regulate backflow. Reference numerals 15A to 15D denote first suction valve bodies that are attached to the partition wall 13 and that are formed in an umbrella shape that opens and closes the four sets of first suction passages 13e. The first suction valve bodies are formed from the pump chambers 16A to 16D. The reverse flow of the fluid to the suction passage 13e is restricted.

  The above-described diaphragm 12 is held between the diaphragm holder 10 and the partition wall 13, and four pump chambers 16 (16 </ b> A to 16 </ b> D) are formed by the four diaphragm portions 12 a and the four first recesses 13 a. Is formed. Further, the narrow-diameter portion 12c of each diaphragm portion 12a is attached to the diaphragm portion mounting hole 7b of the driving body 7, the driving protrusion 9a of the driving body 7 is engaged with the engaging groove 5 of the crank 4, and the supporting protrusion 8 is the diaphragm. The holder 10 is engaged with the recess 11 a.

  In FIGS. 1 and 2, reference numeral 17 denotes a lid body formed in an inverted bottomed rectangular tube shape, and an enclosing wall 17a is integrally projected downward on the entire periphery. On the lower surface of the lid body 17, a ring-shaped partition wall 17 b that is in contact with the partition wall 13 f of the partition wall body 13 is integrally projected downward. In addition, a single discharge cylinder 17d having a discharge port 17c is integrally provided at the center of the ceiling of the lid 17, and a pump chamber is provided at a part of the periphery of the ceiling. One suction cylinder portion 17f in which a first suction port 17e is formed at a position corresponding to 16A is erected integrally.

  By placing the lid 17 on the partition wall 13, the upper surface of the partition wall 13f and the lower surface of the partition wall 17b are in contact with each other, and the upper surface of the enclosure wall 13g and the lower surface of the enclosure wall 17a are in contact with each other. The parts are welded. By welding the contact portion, a discharge chamber 18 that allows the discharge passage 13d and the discharge port 17c to communicate with each other is formed in a space surrounded by the partition wall 13f and the partition wall 17b. A suction chamber 19 is formed in the space surrounded by the partition wall 13f and the partition wall 17b and the surrounding wall 13g and the surrounding wall 17a to allow the first suction passage 13e and the suction port 17e to communicate with each other.

  The diaphragm pump 1 is formed by integrating the case 3, the diaphragm holder 10, the partition wall body 13 and the lid body 17 in a laminated state by a wire spring (not shown).

  Next, the usage method of the diaphragm pump 1 comprised in this way is demonstrated. First, a tube (not shown) is connected to the suction cylinder portion 17e so that water as the first fluid is supplied from the outside of the diaphragm pump 1 to the first suction port 17e. On the other hand, the opening 3b is exposed to the atmosphere so that air as the second fluid is supplied into the case 3 from the outside of the diaphragm pump 1 through the opening 3b which is the second suction port. In order to supply a fluid mixed with water and air discharged from the discharge port 17c to the pressurization target, the discharge cylinder 17d and the pressurization target are connected by a tube (both not shown).

  In this state, when the motor 2 is driven and the crank 4 is rotated via the output shaft 2a, the engaging portion 5a of the engaging groove 5 is engaged with the lower end portion of the driving protrusion 9a. It rotates while changing the inclination direction of the axis following the rotation of the crank 4 in a state of being engaged with the joint portion 5a. Accordingly, the swinging end portions of the four driver elements 7a are sequentially swung in the vertical direction.

  When the swinging end portion of the first driver element 7a moves downward, the first pump chamber 16A expands via the piston portion 12b, so that the inside of the pump chamber 16A is in a negative pressure state. In this state, the blocking of the first suction passage 13e by the first suction valve body 15A is released, the first suction passage 13e is opened, and the second suction valve body 12A is opened by the second suction valve body 12A. The blockage of the suction passage 11A is released, and the second suction passage 11A is opened. Accordingly, the water supplied from the outside of the diaphragm pump 1 to the suction chamber 19 through the first suction port 17e is sucked into the single pump chamber 16A through the first suction passage 13e and is opened from the atmosphere. The air flowing into the case 3 through 3b passes through the second suction passage 11A and is sucked into the first pump chamber 16A through the communication passage 13A. For this reason, water and air are mixed in the first pump chamber 16A.

  Next, when the swinging end portion of the driver 7a of the expanded first pump chamber 16A moves upward, the first pump chamber 16A contracts, so that the water in the first pump chamber 16A The pressure of the fluid mixed with air increases. Accordingly, since the discharge passage 13d is closed by the discharge valve body 14 and the discharge passage 13d is opened, the mixed fluid in the first pump chamber 16A passes through the discharge passage 13d and is discharged into the discharge chamber 18. Through the discharge port 17c and supplied to a pressurized object connected to a tube (not shown) or the like.

  Further, the crank 4 rotates via the output shaft 2a and the swinging end of the second driver element 7a moves downward, so that the second pump chamber 16B expands via the piston portion 12b. Therefore, the inside of the pump chamber 16B is in a negative pressure state. In this state, the blocking of the first suction passage 13e by the first suction valve body 15B is released, the first suction passage 13e is opened, and the second suction valve body 12B is opened by the second suction valve body 12B. The blockage of the suction passage 11B is released, and the second suction passage 11B is opened. Therefore, water supplied from the outside of the diaphragm pump 1 to the suction chamber 19 through the suction port 17e is sucked into the second pump chamber 16B through the first suction passage 13e, and is opened from the atmosphere to the opening 3b. The air flowing into the case 3 through the second suction passage 11B is sucked into the second pump chamber 16B through the communication passage 13B. For this reason, water and air are mixed in the second pump chamber 16B.

  Next, when the swinging end of the driver 7a of the expanded second pump chamber 16B moves upward, the second pump chamber 16B contracts, so that the water in the second pump chamber 16B The pressure of the fluid mixed with air increases. Accordingly, since the discharge passage 13d is closed by the discharge valve body 14 and the discharge passage 13d is opened, the mixed fluid in the second pump chamber 16B passes through the discharge passage 13d and is discharged into the discharge chamber 18. Through the discharge port 17c and supplied to a pressurized object connected to a tube (not shown) or the like.

  Thereafter, the third pump chamber 16C and the fourth pump chamber 16D are sequentially expanded and contracted, so that water and air are mixed in the pump chambers 16C and 16D in the same manner as the pump chambers 16A and 16B described above. The mixed fluid is discharged from the discharge port 17c.

  Thus, according to the present invention, since different types of fluids can be mixed in one pump chamber 16, the number of diaphragm pumps conventionally required only for the type of fluid can be reduced to one. Therefore, cost reduction and space saving can be achieved. Moreover, since it can respond with one pump, parts replacement becomes easy and maintenance property is also improved.

  In this embodiment, a so-called four-cylinder diaphragm pump having four pump chambers has been described. However, one cylinder may be used, and the invention can be applied to any cylinder. In the present embodiment, the fluid is mixed in all four pump chambers, but the fluid is mixed in at least one pump chamber of the four pump chambers, and the fluid is mixed in the remaining pump chambers. One kind of fluid may be sucked without any change, and various design changes are possible. Further, although the fluid to be supplied is water and air and liquid and gas, different types of liquids such as detergent and water may be used, and it is needless to say that the fluid can be applied to various mixed fluids. Further, two suction ports 3b and 17e are provided to supply two types of fluids. For example, two or more types of fluids are provided such that two suction ports 3b are provided to supply different types of gases. May be supplied. In addition, when the fluid to be supplied is other than air, a cylindrical portion such as the suction cylindrical portion 17e may be provided instead of the opening 3b.

  DESCRIPTION OF SYMBOLS 1 ... Diaphragm pump, 2 ... Motor, 3b ... Opening (2nd suction inlet), 13 ... Partition body, 10 ... Diaphragm holder, 11A-11D ... 2nd suction passage, 13d ... Discharge passage, 13e ... First 1 suction passage, 14 ... discharge valve, 15A to 15D ... first suction valve, 16A-16D ... pump chamber, 17 ... lid, 17c ... discharge port, 17e ... first suction port.

Claims (1)

At least one pump chamber that expands and contracts, a suction passage provided in the pump chamber for sucking fluid into the pump chamber, and a suction valve body that opens and closes the suction passage and restricts the backflow of fluid from the pump chamber A discharge passage provided in the pump chamber for discharging fluid from the pump chamber, a discharge valve body that opens and closes the discharge passage and restricts the back flow of the fluid into the pump chamber, and the suction passage from outside In a diaphragm pump comprising a suction port for sucking fluid into the passage and one discharge port for discharging fluid discharged from the discharge passage to the outside,
A diaphragm having a diaphragm portion that reciprocates by driving of a motor, a diaphragm holder that holds the diaphragm, and a partition wall that is provided with the discharge passage and forms the pump chamber in cooperation with the diaphragm portion;
Providing a plurality of suction passages for sucking different fluids into at least one of the pump chambers ;
The plurality of suction passages are configured by a first suction passage provided in the partition body and a second suction passage provided in the diaphragm holder, and the suction valve body is configured as the first suction passage. A first suction valve body that opens and closes a passage and a second suction valve body that is integrally formed with the diaphragm and opens and closes the second suction passage;
A diaphragm pump characterized in that a communication passage is provided between the diaphragm holder and the partition wall so that the second suction passage and the pump chamber communicate with each other.

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