JPS58165592A - Impeller protecting device for slurry discharging pump - Google Patents

Abstract

PURPOSE:To make it possible to prevent a water suction impeller from being worn and damaged, by associatingly connecting an electric power supply relay for rotating a motor in one direction, to a counter phase corrector so that the rotation of the impeller is maintained in one direction. CONSTITUTION:Normally open type time switches 37, 38 are turned on after being delayed for a time period necessary for the switching operation of relay switches 26, 27 in a latching relay 28, and power from an electrical power source R or S is applied to a relay coil 31 or 32 surely after the relay switches 26, 27 in the lacth relay 28 is changed-over, for preventing erroneous operation in relay switches 33, 34 or 35, 36 during the change-opever operation of the electrical power sources R, S by the raly switches 26, 27, so that a motor 2 is prevented from being accidentally reversed due to the erroneous operation of the switches. Accordingly, the rotation of the motor is always maintained in one direction.

Description

[Detailed Description of the Invention] The great invention is a submersible pump that connects a feeding tube for discharging muddy water, etc. and submerges the entire body, and a muddy water excretion pump such as a submersible Sai V pump, which is connected to a three-phase AC power source. The present invention relates to a device that incorporates a three-phase AC power supply motor and rotates the water suction impeller of the pump to pump muddy water or the like.

Generally, when the submersible ice pump and the submersible sun r pump are driven by a three-phase AC power source, if a three-phase AC type dQ plug is wired to the pump via a power cord V, the wiring combination of the plug etc. The positive and negative phase connections of a three-phase AC power supply are caused by this. The reverse phase connection of the power source causes the electric motor installed in the pump to rotate in reverse, or even by reversing the motor, water action is obtained by the water suction impeller of the pump, so that the vane impeller rotates in the normal direction. It was difficult to easily determine which state was in the reverse direction, even during a test run.

For this reason, pumping work of muddy water, etc. was performed with the water suction impeller reversed, but when the water suction impeller is reversed, the rotational resistance against muddy water increases rapidly compared to when it rotates normally, so the water suction impeller Due to this severe wear and tear, the impeller became unusable in a relatively short period of time, and the water absorption impeller had to be replaced and repaired repeatedly at an early stage, which was extremely uneconomical and reduced work efficiency.

The great invention is to pump up muddy water by constantly rotating the water suction impeller the same h times in either the positive or negative phase connection of the three-phase AC power supply, and the three-phase An AC electric motor and a negative phase corrector for this three-phase AC power supply are incorporated, and the problem IC when connecting the positive and negative phases of the three-phase AC power supply also drives the water suction impeller of the pump. A power supply switching device for rotating the impellers in the same direction is interlocked and connected to the negative phase corrector to keep the rotational direction of the impeller constant. - It eliminates the trouble of checking the positive and negative phase connection mode of the screw, and allows the pumping operation of the impeller, which is rotated only a preset number of h times, to be performed stably by leaving the IC for a long time, and also corrects the negative phase. equipment and power supply 6'
By incorporating the L converter into the pump, you can wire the three-phase AC power supply in any desired manner, making wiring for the pump simple even in places where there is no electrical wiring equipment, such as civil engineering work sites! (In 17 □ We are trying to provide an impeller protection device for muddy water excretion pumps so that it can be carried out safely.)

Embodiments of the present invention will be described in detail below with reference to the drawings.

Figure 1 is a partially cutaway overall view of a submersible pump and a muddy water excretion pump used as a submersible pump. (The waterproof chamber 13 containing lock oil to prevent water from entering in the 21 part C) is formed, and the waterproof chamber 131 is formed below the housing fl+.
A vane chamber 14) is formed through the waterproof chamber (3), and the output shaft 15) of the heavy motor 12) is protruded into the vane chamber (4) through the waterproof chamber (3). 6) is fixedly supported on the output shaft 15), and a suction port 17 is provided at the lower surface of the vane chamber (4) approximately in the center of the impeller (61). A go1 frame (8) surrounding the outside of the suction port 17) is fixedly installed, and a cutter fan 1 is attached to the tip of the output shaft 15) which protrudes into the curve of the frame 18).
91 is removably installed, the cutter fan 19) is completely removed L4 and: (7", !:, 7 (! I'nf, L-
1. . Attach a 2°-fan (9Ii') and use it with a submersible sun pump.

Furthermore, a feeding vibrator 101 that sends out earth, sand, muddy water, etc. is connected to the discharge port full of the vane chamber 14).
2) A hanging bracket Jt1+a+ is fixed to the upper surface of the pump housing fl+, and an electric control box (14) for the electric motor i21 is integrally formed with the housing +111, and the motor f2
1! Connect the conductive cable (16) to the control box i41K.

LL Figure 2 is a power supply circuit diagram of the electric motor (2) marked E, in which the three-phase AC power supply (2) (S
) (T) is connected to the positive phase and negative phase of the motor (T). 2) and a power supply switch f171 that rotates the two in the same direction, and these are incorporated into each of the electrical control boxes 114117fi.Then, a slow-phase coil 118 is connected to one end of the Sanwa AC current grRlK. ) and the other electric IIj, (S)(
Connect one end to T) and the second capacitor, lfl +201, and the other end of the front 4 coils [81 and each capacitor +9 + 20] to the Y-shaped J connection and connect the neutral point. Normally closed time switch 12+112 forming +01
2 is equipped with a timer +231, a set coil -241 and a reset coil +251. A rectifier type bone is connected between each capacitor 191120) and the neutral point (O) to excite the set coil +241 and r, and the J' reset coil ω, respectively.
and is provided in the negative phase corrector 16i1.

By connecting the power supply rE3 (sl) in positive phase, the phase voltage of the first capacitor (2) is lowered and the phase voltage of the second capacitor field is increased. Conversely, the impedance of the coil (I81 and each capacitor +91 !2d) is set so as to change the phase voltage, and the power supply fRfsl (1)
The set coil 1251'i is excited when the positive phase is connected, and the reset coil 1251'i is excited when the negative phase is connected. Closed type time switch +211'+221 i Formed to turn off.

Next, the power supply switching device (171 is configured, for example, with a four-gear, tubular balance armature mechanism and an electromagnetic contactor type mechanism, and the latching 11 and I'2!'I
Each relay switch ωa> of I through one power supply nfsl
The first and @2 relay coils Ll1113Z connect one end to the other power supply σ) and the relay switch 1 when the power supply (R1+814T+ is connected in positive phase).
The relay switch 1 is turned on by the energized current through the coil (11 coils).
It is equipped with a relay switch 1, which is turned on by an IK211 relay coil 13Z, which is excited through an 11 race switch 1271 when the S+ (branch) is connected in reverse phase, and a power source is connected to the power source through the one switch 1341i. )(
1) to the input terminal (5) of the electric motor 12+ (5)
Connect the positive phase to the other 1L switch 13θ13
61 f: Connect the power supply (8) + 81 (to) to the input terminal (5) Iv) (5) of the motor (2) in reverse phase through ('I5 is applied to the motor (21) and the motor (2) is always rotated in the same direction to connect the water absorption impeller (6) and the cutter fan. (It is formed so that the direction of rotation of the latching relay 91 is kept constant. Also, each of the latching relays 91 and 1 loop switch L261I
A normally open time switch 13711381 is provided in the above-mentioned timer to connect 271 to the front part (B), and each
The timer l is delayed by the time required for 61+271 switching operation.
'Z'll's normally open time switch: (711381
Be sure to turn it on, always turn on the 11th relay switch (mouse's relay switch 261 + 2'n i after changing IJI)
Connect this power plane or 6 to the coil 131) or 13z.
) is applied, and the 1 rou switch (2ρ1271 i/
This is designed to prevent malfunction of the 1R switch 1R31+341 or 1° C. during switching of the power source 181 due to the power source 181, and to prevent the motor (2) from rotating in reverse due to this malfunction.

As stated above, the uninvented invention has been established, and three-phase alternating current, power supply■
fs) The positive phase and negative phase connections in (1) are caused by, for example, the wiring connection of the conductive cable (151) and the wiring connection of the power plug (not shown) attached to the tip of the cable, which is a three-phase AC power source CR). +81 (T) is connected in positive phase, the phase retarding action of the above coil (18) and each capacitor L191 z+ causes the power supply ■: (Tl to be connected in reverse phase Pseudo Llj as a mode
A phase-current circuit is used, and the base layer is a pseudo-single-phase alternating current.

The phase voltage of the capacitor '2fj) becomes high, and only the set coil 124 of the latching II relay 1281 is energized via the rectifier '(I+). When the time switch l371 of
11i excitation, turn on each 1 loop switch.
(:'II Positive phase power supply plane +8 via IM+) (1)
Set the input terminal αηM(3) of the electric motor 1゛2°1 ((positive phase input, the motor 12 rotates in the forward direction and the suction impeller 16) and the power output fan 191 to rotate in the t direction. . If you replace the wiring of three-phase AC power supply (T) and connect this in reverse phase, the above coil ul
7t and each capacitor +9'・20), the power source (
8) Is ts) t'r) a pseudo-three-phase intersection as normal lip-like? t is formed, and the phase voltage of the inverse VC first capacitor 191 becomes high, and only the 11 set coil 1251 of the counter circuit 1281 is excited through the rectifier +291i, and the I+ race switch f261 is turned on.
After turning on the timer tea time switch (381)
271 to excite the 21 lou coil +37,
The negative phase power supply (8) + 81 (1) is inputted in positive phase to the input terminal (5) M (equipment) of the power supply 1 motor (2) through the on-actuating valley 1 Lucy border 13θ Zheng 4, Similarly to the positive phase connection above, the motor (2) is rotated in the forward direction to connect the water suction impeller f6.
1 and cutter fan (9) in the set direction. As mentioned above, the water suction impeller 16) and cover fan 19) are rotated in the same direction in both the positive and negative phase connections of the three-phase AC power @ (8) (s) ) The whole a is submerged in water, the cutter fan 191K stirs the muddy water in the core, and the water absorption impeller 16) sends the muddy water to the feed pipe 1101 via the vane chamber 14).

As is clear from the above embodiments, what is not yet invented is a muddy water excretion pump fA) which is thrown into water.VC three-phase AC current ω1 motor 1
21 and this three-phase AC power supply side fsl (Tl).
When +Tl is connected in the positive phase and reverse phase, the motor (2) that drives the water suction impeller (61) of either (rr- is also the pump) is rotated 10,000 times. One series is connected to the phase corrector 116) and the impeller (
61 to keep the rotation direction constant, and saves the trouble of checking the positive and negative phase connections when connecting the three-phase AC power supply (8) + 81 (1) to the pump. The pumping operation of the impeller 16), which rotates only in a preset direction, can be achieved stably over a long period of time, and the reverse phase corrector (16) and power supply switching @
By incorporating the 1171'i into the pump (A), you can wire the three-purpose AC power i (R) [81[T] in any desired manner, even in places without electrical wiring facilities such as civil engineering work sites. This provides remarkable effects such as the ability to easily and safely perform the specified wiring for the pump fAl.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, and Fig. 2 is an overall partially cutaway view of a muddy water excretion pump, and Fig. 2 is an electrical circuit diagram of the main part. +A3...Muddy water excretion pump■(S)(ri...Three-phase AC power supply...1(2)...
Electric-1 motor! −・ (6)・・・Mouth and water impeller,・・. 11 electric (16)...Moe phase corrector +171...power exchanger

Claims (1)

[Claims] The muddy water excretion pump that is thrown into the water is equipped with a three-phase AC electric motor and a negative phase corrector for the three-phase AC power supply, and the pump can be used both when the three-phase AC power supply is connected to the positive phase and negative phase. A power supply switch that rotates the motors that drive the water suction impellers in the same direction is interlocked and connected to the reverse phase corrector to maintain a constant rotational direction of the impellers.
An impeller protection device for a muddy water excretion pump, characterized by comprising: