JP4500037B2 - Protection device for diaphragm type pump - Google Patents

Description

  The present invention relates to a protection device for a diaphragm type pump. More specifically, the present invention relates to a protection device for a diaphragm type pump that is mainly used for intake / exhaust of air to / from indoor air mats and air beds, oxygen supply in fish tanks and domestic septic tanks, or sampling of inspection gas in pollution monitoring.

  As shown in FIG. 6, the conventional diaphragm pump 101 supplies power to the vibrator 102 by a magnetic interaction between a permanent magnet 103 fixed to the vibrator 102 and an electromagnet 104 arranged facing the surface. The pump chamber is configured to reciprocate in the longitudinal direction in accordance with the frequency, and the volume of the pump chamber increases and decreases in the left and right directions due to the vibration of the diaphragm 105 to which the vibrator 102 is connected. Ejection is performed (see Patent Document 1). The outer periphery of the diaphragm 105 is sandwiched between a diaphragm base 107 and a pump casing 108 of the pump case 106. The pump 101 includes a protection device 111 for stopping the vibration of the vibrator 102 and preventing damage around the vibrator when the diaphragm 105 is damaged due to repeated bending and use, thereby stopping the vibration of the vibrator 102. .

  This protection device 111 is provided with two claws 102a spaced above the vibrator 102, a fixed piece 113 serving as a terminal of the power supply circuit of the electromagnet 104, a leaf spring-like movable piece 114, and a beam frame 112. An L-type detection arm 115 is provided. The detection arm 115 is rotatable about the beam portion 112 a by a rotating shaft 116, and a shoe 117 extending on one side thereof is disposed between the two claws 102 a of the vibrator 102. The other end of the detection arm 114 is fixed with a nut or the like by connecting the fixed piece 113 and the movable piece 114 with a shear screw 118.

  When the amplitude of the vibrator 102 becomes an abnormal amplitude (amplitude greater than the normal amplitude) due to the breakage of the diaphragm 105, one of the two claws 102a of the vibrator 102 has the detection arm 115. , The rotational force about the rotation shaft 116 acts on the detection arm 115 to break the shear screw 118. As a result, the fixed piece 113 is separated from the movable piece 114 and the power of the pump is turned off to stop the vibration of the vibrator 102.

  Further, as shown in FIG. 7, it is attached to the electromagnet 156 side so that the operating end 155 of the lever 154 that is rotatable about the shaft 153 is disposed between the pair of claws 152 provided on the vibrator 151. There is a protective device 157 that is a power-off switch (Patent Document 2). In such a protective device 157, when the concave portion of the head 158 of the lever 154 and the convex portion of the contact terminal 159 are engaged, and the amplitude of the vibrator 151 becomes an abnormal amplitude due to breakage of the diaphragm, the vibration Of the two claws 152 of the child 151, one of the claws 152 hits the operating end 155, the head 158 of the lever 154 and the contact terminal 159 are disengaged, and the pump is turned off to vibrate the vibrator 151. Stop.

Registered Utility Model No. 300702 Japanese Patent Laid-Open No. 2-132858

  However, in the protection device of Patent Document 1, after pulling out the plug of the pump power source, the broken shear screw and nut remains from the inside of the pump case, and after repairing the diaphragm, a new shear screw and nut are removed. It is necessary to re-activate (reset) and restart the pump. Since such a reset operation must be performed inside a narrow pump case, there is a problem that the reset operation is troublesome.

  In the protective device of Patent Document 2, after the diaphragm is repaired, the handle 160 can be rotated to engage the head 158 of the lever 154 with the contact terminal 159 (reset), and the pump can be driven again. Since the rotation operation of the handle 160 can be performed only after the pump case is removed, there is a problem that the reset operation is troublesome.

  In view of the above circumstances, an object of the present invention is to provide a protection device for a diaphragm type pump that can simplify a reset operation and facilitate maintenance.

The protection device for the diaphragm type pump of the present invention is a diaphragm type that vibrates the diaphragm connected to the vibrator by the electromagnetic vibration of the vibrator having the permanent magnet based on the magnetic interaction between the electromagnet and the permanent magnet. A protection device for a pump, wherein the protection device is attached to a pair of claws formed on the vibrator and in the vicinity of an opening formed in a pump case of the pump so as to face the claws. When the reset of the detection means after repair of the diaphragm, the pump case outside from said detection means of the opening of Ri Do and a reset means for performing through the insertion opening has, the detecting means, between the pair of pawls A detection lever disposed on the pump case, a support portion having a substantially concentric insertion opening with the opening of the pump case, and rotatably mounting the detection lever. A switch portion having a terminal that contacts the contact portion, and the detection lever is capable of rotating on an upper portion of the vibrator along a vibration direction of the vibrator, and the reset means includes the pump The push button is detachably mounted between the inner peripheral surface of the opening of the case and the annular portion of the support portion inserted into the opening, and the push button is inserted into the insertion port at the time of resetting wherein a bottomed cylindrical body, and a flange portion formed on the open side of the body, the Rukoto such is composed of a skirt portion provided upright in the axial direction of the body from the peripheral edge of the flange portion to It is said.

  According to the present invention, it is possible to simplify the reset operation and facilitate maintenance. Thereby, while being able to maintain the safe driving | operation of a pump, the reliability of the quality of a pump can be improved.

  Hereinafter, a protection device for a diaphragm type pump according to the present invention will be described with reference to the accompanying drawings.

  The diaphragm type pump to which the protection device of the present invention is applied is not particularly limited in the present invention. For example, as shown in FIG. 1, based on the magnetic interaction between the electromagnet 1 and the permanent magnet 2, The diaphragm 4 connected to the vibrator 3 is vibrated by the electromagnetic vibration of the vibrator 3 provided with the permanent magnet 2, and when an abnormal amplitude in the longitudinal direction of the vibrator 3 is detected, And a protection device A for stopping the vibration of the vibrator 3.

  The electromagnet 1 is disposed opposite to the pump case 5 and includes, for example, an E-type iron core and a wire coil portion incorporated in two concave portions of the E-type iron core. The diaphragm 4 is made of EPDM (ethylene propylene rubber) or CR (chloroprene). The vibrator 3 is disposed between the pair of electromagnets 1 at a predetermined interval (gap), and a flat ferrite magnet or a rare earth magnet is provided on a flat nonmagnetic body 6. The two permanent magnets 2 are fixed at predetermined intervals. As this vibrator 3, other than a flat plate, for example, a columnar one can also be adopted. A pump casing portion 7 including a pump casing 7a and a lid 7b sandwiching a packing is fixed to both ends of the pump case 5. The pump casing portion 7 further has a pump portion including a suction chamber 8, a discharge chamber 9 and a compression chamber 10, and the suction chamber 8 communicates with the compression chamber 10 in order to communicate with the suction port 11 and the suction valve. 12, the discharge chamber 9 includes a discharge port 13 and a discharge valve 14, respectively.

  The protection device A includes a pair of claws 15 formed at an upper end portion (upper side of the drawing in FIG. 1) of the main body 6 of the vibrator 3, and an opening formed in the pump case 5 facing the claws 15. 16 comprises detection means 17 attached in the vicinity of 16 and a push button 18 as reset means. In the present embodiment, a pair of claws 15 are also formed at the lower end portion of the main body 6 in order to prevent the upper and lower portions of the vibrator 3 from being erroneously assembled and to maintain the balance between the upper and lower sides. In the present embodiment, the protective device A is provided at the upper end portion of the pump case 5. However, the present invention is not limited to this and can be provided at the lower end portion of the pump case 5. .

  The detection means 17 includes a detection lever 20 having a detection portion (shoe) 19 disposed between the pair of claws 15, a support portion 21 for rotatably mounting the detection lever 20, and the detection lever 20. It is comprised from the contact part 22 extended from the side and the switch part 24 which has the terminal 23 which contact | abuts. The state in which the switch unit 24 and the power source of the pump are connected and the contact unit 22 is in contact with the terminal 23 is the state in which the switch unit 24 is ON.

  The detection unit 19 reliably detects lateral (width) vibration of the claw 15 when the vibrator 3 has an abnormal amplitude in the longitudinal direction, and transmits the contact force with the claw 15 to the detection lever 19. 15 is formed slightly wide so as to surround 15 in the width direction (the vertical direction in the drawing in the drawing) (see FIG. 2). The attachment structure of the detection lever 19 to the support portion 21 is such that when the contact force generated when the claw 15 contacts the detection portion 19 exceeds a predetermined magnitude due to the abnormal amplitude of the vibrator 3, the detection lever In the present embodiment, the structure of the detection lever 19 can be rotated by the tightening force of the screw 25 and the nut 26. The power can be adjusted. Reference numeral 27 denotes a washer. The contact portion 22 extending from the side surface of the detection lever 19 is in an ON state in which the pump can be operated by always pushing the terminal 23, and when the detection lever 19 is rotated due to abnormal vibration of the vibrator, The engagement with the terminal 23 can be released. The contact portion 22 can be formed into a shape that can be appropriately engaged according to the shape of the terminal 23 of the switch portion 24. For example, when the shape of the terminal 23 is a round shape, the tip shape of the contact portion 22 is concave. It can be shaped. As the switch unit 24, a micro switch or an ON-OFF switch similar to the micro switch can be used.

  The support portion 21 includes a base portion 28 for attaching the detection lever 19 and the switch portion 24, a flange portion 30 attached to the pump case 5 by a screw 29, and an annular portion 31 inserted into the opening portion 16. It is configured. The annular portion 31 is disposed substantially concentrically in the opening 16.

  The push button 18 is used to return the posture of the detection lever 19 so that the contact portion 22 of the detection lever 19 after rotation is brought into contact with the switch portion 24 through the insertion port 28a of the base portion 28. In the present embodiment, a cap shape is provided that is detachably mounted between the inner peripheral surface 16a of the opening 16 and the annular portion 31. The push button 18 has a bottomed cylindrical main body 18a with one end open, a collar portion 18b formed on the open side of the main body 18a, and an axial direction of the main body 18a from the periphery of the collar portion 18b. It is comprised from the provided skirt part 18c. The skirt portion 18 c is inserted into an annular groove formed between the inner peripheral surface of the opening 16 and the annular portion 31. In order to prevent the push button 18 from falling off due to the vibration of the pump, it is preferable to provide a drop prevention means made of an elastic body such as an O-ring 33 in the annular groove on the outer periphery of the annular portion 31 for the purpose of mounting and holding.

  In the present embodiment, the diaphragm 4 is damaged and an abnormal amplitude in the longitudinal direction of the vibrator 3 is generated. As shown in FIG. 4, the vibrator 3 is greatly shaken in the direction of the arrow F <b> 1. When contacting the detection unit 19 and the detection lever 20, the detection lever 20 rotates in the direction of arrow F2. As a result, the contact portion 22 of the detection lever 20 and the terminal 23 of the switch portion 24 are disengaged, the pump is automatically turned off, and the vibration of the vibrator 3 is stopped.

  Next, when the damaged diaphragm is replaced (repaired) and the pump is driven again, as shown in FIG. 5, first, the push button 18 is removed from the annular portion 31 located in the opening 16 and then reversed. Then, the main body 18a of the push button 18 is inserted into the insertion port 28a from the direction of the arrow F3.

  Next, the main body 18a of the push button 18 is pressed against the detection lever 20, and the detection lever 20 is rotated in the direction of arrow F4 to return to the original posture shown in FIG. 1 (reset).

  Since the reset in the present embodiment is performed from the outside of the opening of the pump case through the insertion opening of the annular portion, the reset operation can be easily performed. Thereby, since the maintenance of the protection device can be facilitated, the safe operation of the pump can be maintained, and the reliability of the quality of the pump can be improved.

  In addition, since the protective device according to the present embodiment is miniaturized, it can be easily reset in a small space.

  In the diaphragm type pump in the present embodiment, the pump case can be made of metal or synthetic resin. However, if the casing is formed by molding resin on the outer surfaces of the pair of electromagnets, the production cost is reduced. Can be reduced. As a molding material of such a mold resin, ABS, PBT, and BMC (bulk mold compound) having heat resistance and a low shrinkage rate are desirable. For example, unsaturated polyester-based BMC can be used.

It is a fragmentary sectional view showing a diaphragm type pump to which a protection device concerning one embodiment of the present invention is applied. FIG. 2 is a perspective view of the protection device and vibrator of FIG. 1. It is sectional drawing of the protection apparatus of FIG. It is a figure explaining operation | movement of the protection apparatus of FIG. It is a figure explaining operation | movement of the protection apparatus of FIG. It is a fragmentary sectional perspective view which shows an example of the protection apparatus of the conventional diaphragm type pump. It is the elements on larger scale which show the other example of the conventional protective device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnet 2 Permanent magnet 3 Vibrator 4 Diaphragm 5 Pump case 6 Main body 7 Pump casing part 7a Pump casing 7b Lid 8 Suction chamber 9 Discharge chamber 10 Compression chamber 11 Suction port 12 Suction valve 13 Ejection port 14 Ejection valve 15 Claw 16 Opening portion 16a Inner peripheral surface 17 Detection means 18 Push button 19 Detection part (shoe)
DESCRIPTION OF SYMBOLS 20 Detection lever 21 Support part 22 Contact part 23 Terminal 24 Switch part 25, 29 Screw 26 Nut 27 Washer 28 Base 28a Insert port 30 Flange part 31 Annular part 31
33 O-ring A Protection device

Claims (3)

A protection device for a diaphragm type pump that vibrates a diaphragm connected to a vibrator by electromagnetic vibration of a vibrator provided with the permanent magnet based on a magnetic interaction between an electromagnet and a permanent magnet, the protection device Are a pair of claws formed on the vibrator, a detecting means attached to the pump case in the vicinity of the opening facing the claws, and a detecting means after repairing the diaphragm reset, Ri Do and a reset means for performing through the insertion opening from the outside of the opening portion of the pump casing having the said detection means,
The detection means includes a detection lever disposed between the pair of claws, a support portion having an insertion port substantially concentric with the opening of the pump case, and a support portion for rotatably mounting the detection lever; It comprises a switch part having a terminal that contacts the contact part of the detection lever, and the detection lever is rotatable along the vibration direction of the vibrator.
The reset means is a push button that is detachably mounted between the inner peripheral surface of the opening of the pump case and the annular portion of the support portion inserted into the opening. A bottomed cylindrical main body to be inserted into the insertion port, a collar formed on the open side of the main body, and a skirt that is erected in the axial direction of the main body from the periphery of the collar diaphragm pump protector you characterized by comprising a. It said annular portion protection device of a diaphragm-type pump in the outer peripheral disengagement prevention means of the push button is disposed to claim 1, wherein the. The protective device for a diaphragm type pump according to claim 2 , wherein the drop-off prevention means is an O-ring.

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