KR810002526Y1 - Automatic control system for a wellpump installation - Google Patents

Abstract

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Description

Operation control device of automatic well pump

1 is a piping state diagram of an automatic well pump showing an embodiment of the present invention,

2 is an electric circuit diagram of an embodiment of the present invention

3, 4, and 5 are partial longitudinal cross-sectional views of the operation removal apparatus showing one embodiment of the present invention.

6, 7 and 8 are operation explanatory diagrams showing the contact opening and closing operation of the operation control apparatus.

The present invention relates to an operation control device for an automatic well pump.

More specifically, the present invention relates to an improvement in an idle driving prevention device that prevents a pump from running idle (or water running) in a case where air is sucked into a pumping pipe.

In general, an automatic well pump is provided with an idle operation prevention device. For example, when air is sucked in due to a failure of a receiving portion of a pumping pipe, the pump runs idle and the motor burns out. Accidents caused by idling are prevented.

Therefore, the commonly known idle operation prevention device is configured to detect and operate only the pressure (negative pressure) of the suction shaft of the pump, so that when the well surface is extremely shallow or when the surface is above the pump, for example, Heavy air operation prevention device malfunctioned and the pump stopped working.

The present invention has been made in view of this point, and its main object is to provide an operation device of an automatic well pump having an idle operation prevention device with no malfunction and reliable operation.

The present inventors have studied variously to achieve the intended purpose of the present invention, and have repeatedly focused on the following points as a result of repeated experiments.

In other words, in the case where the negative pressure of the pump suction shaft is detected to operate the idle operation preventing device, the above-mentioned drawback is focused on the problem that can be solved by detecting the pressure on the pump discharge side.

Therefore, a feature of the present invention is an operating device of an automatic well pump having an anti-driving device for controlling the operation stop of the pump driving motor by detecting the pressure on the suction side and the discharge side of the pump.

Thus, if the pressure at the pump discharge side is detected as the anti-driving device as well as the pressure at the pump suction side as in the present invention, the above-mentioned problem is solved and the operation as the anti-driving device is assured.

Another object of the present invention is to provide an operation control device having a function of a pressure switch and an anti-driving device with a simple structure in relation to the above-mentioned main purpose.

The well-known automatic well pump is provided with a pressure switch (pressure switch) and an anti-driving device separately for detecting the pressure in the pressure tank.

Therefore, since each of these devices is separately installed, the electric circuit is complicated as much and at the same time, two devices are installed, so that the mounting operation is not easy.

However, the above-mentioned problem is solved in another object of the present invention.

That is, the present invention is to provide an auxiliary output unit for opening and closing the switch unit in the output unit for opening and closing the switch unit in accordance with the displacement of the pressure detection unit for detecting the pressure of the suction side and the discharge side of the pump in order to achieve the above-described other object have.

As a result, in the case where one of the pumps is operated at idle as a pressure switch, it is usually an operation control device having an action as an anti-driving device.

And detailed features and other detailed features of the present invention will be clearly understood as a description of one embodiment described below.

The automatic well pump shown in FIG. 1 is composed mainly of, for example, a pump 1 of a Westco type pump and a pressure tank 2 provided on the discharge side of the pump 1. The pump 1 is mounted on the pressure tank 2.

The suction pipe 3 communicates with the suction side of the pump 1 via the suction inner pipe 4 disposed in the pressure tank 2.

In the suction pipe 3, a filter 6 is connected to the lower end of the reverse valve, which is generally known, and the lower end of the suction pipe 3 is locked in the well W · E.

One end of the discharge inner tube 7 is immersed in the bottom of the pressure tank 2 and the other end is in communication with the discharge side of the pump 1.

One end of the discharge tube 8 communicates with the pressure tank 2, and the other end is provided with a water supply 9.

The operation control device 10 of the automatic well pump shown in FIG. 1 shows the pressure in the pressure tank 2 located on the discharge side of the pump 1 and the suction pipe 3 located on the suction side of the pump 1. The pressure (negative pressure) in the cylinder is detected to control the column and the stop of the pump 1.

And this operation control apparatus 10 has a function of a pressure switch and an anti-operation apparatus as mentioned later.

In the case where the operation control device 10 acts as a pressure switch, the electric circuit is connected to the pressure switch 11 between the power source 13 and the pump driving motor 14 as shown in FIG. The start switch 15 which shorts between the electrical contacts of is connected. The start switch 15 described above is used when the pump is used for the first time.

The pressure of the discharge side of the pump 1 and the pressure of the suction side of the pump 1, that is, the operation control apparatus 10 operating in the total head H (see FIG. 1), is shown in FIG. As shown in detail in FIG. 4 and FIG. 5, the main portion is composed of a pressure detector 16 and an output unit 18 that transmits the force transmitted from the pressure detector 16 to the switch unit 17.

In the two diaphragms 19 and 20 forming the pressure detection unit 16, a rubber for detecting the pressure on the discharge side of the pump 1 (in the pressure tank 2 in the first embodiment of the present invention). The outer circumferential portion of the diaphragm 19 (hereinafter referred to as the diaphragm 19 of the discharge side) is sandwiched between the lower case 21 having the pressure hole 28 and the end face of the intermediate case 22.

Therefore, the center part of this discharge side diaphragm 19 with which the outer peripheral part was fixed is comprised so that it may move.

On the other hand, the outer circumferential portion of the diaphragm 20 (hereinafter referred to as the suction side diaphragm) made of rubber or the like for detecting the pressure on the suction chip side of the pump is applied to the movable pressing plate 23 and the exposure side diaphragm 19. It is sandwiched between the end surfaces of the corners 24A of the hydraulic disk 24 which are subjected to the action of the pressure to be applied.

In addition, the center portion of the suction side diaphragm 20 is pressed by the pressing element 26 having a hole 25 formed in the center of the suction side diaphragm 20 pressed against the support 29 in the upper case 27. It is fixed.

When the suction side diaphragm 20 is attached as mentioned above, the negative pressure chamber 30 is formed between the hydraulic disk 24 and the hydraulic pressure surface of the suction side diaphragm mentioned above.

Thus, the negative pressure chamber 30 is the suction side of the pump 1 through the pressure passage 31 formed in the upper case 27 and the pressure induction pipe 32 (see FIG. 1) communicated with the passage 31. In communication with

In other words, the pressure induction pipe 32 described above is connected to the upper case 27 and the other end is connected to the suction pipe 3 located upstream of the reverse side valve 5 so as to be in the negative pressure chamber 30. And the suction side of the pump 1 are communicated.

The pressure chamber 28a is formed between the pressure receiving surface of the discharge side diaphragm 19 and the inner surface of the lower case 21 facing the pressure receiving surface as shown in detail in FIG.

Thus, the above-described pressure chamber 28a is connected to the connection hole 33 of the lower case 21 and the other end is connected to the pressure tank 2 through the connecting pipe 34 (see FIG. 1). It communicates with the pressure tank 2 used as the discharge side of 1).

The output side 35, which is one component constituting the output unit 18, is connected to the central portion of the disc plate 36 housed in the upper case 27 and is integrated with the disc plate 36.

Moreover, the front end of the output side 35 is inserted in the center cylinder 39 of the upper base 38 so as to face the side end of the planar 37 acting on the switch section 17.

The movable pressing plate 23 is provided with a plurality of auxiliary output sides 40a and 40b, and these auxiliary output sides 40a and 40b penetrate through the guide holes 4 formed in the upper case 27 to allow the disk plate 36 to be moved. Fixed to

An elastic body 42 of compression spring is enclosed in the center cylinder 39 of the upper base 38 so as to surround the outer periphery of the output side 35, which elastic body 42 is in the center cylinder 39 of the fisk palm 36. Exposed between the inner end faces. Therefore, this elastic body 42 always presses the whole output part 18 downward.

It goes without saying that the elastic body 42 may be worn around the outer circumference of the central cylinder 39.

In the configuration as described above, the pressure received by the suction side diaphragm 20 and the pressure received by the discharge side diaphragm 19 held at the center portion and held at the outer circumference portion are the auxiliary output side constituting the above-described output portion 18. It is transmitted to the switch part 17 mentioned later through 40a, 40b, the disk board 36, and the output side 35. As shown in FIG.

As a result, the switch unit 17 described in detail later opens and closes to open and close the power supply circuit of the pump driving motor 14 to control the start and stop of the pump 1.

In the upper center of the upper base 38 connected to the upper surface of the upper case 27, there is formed a receiving hole 44 into which the planar 37 is inserted and the main elastic body 43 made of a compression spring is accommodated.

This main elastic body 43 is accommodated in the storage hole 44 so as to surround the outer periphery of the planar 37 in which a part thereof is inserted in the storage hole 44. Thus, one end of the elastic body 43 is supported at the corner 45 formed at the end of the planar 37.

Moreover, the other end of the main elastic body 43 mentioned above in the inner end surface in the adjustment part 47 wound by the spiral so that it can adjust freely to the annular wall 46 which forms the accommodation hole 44 is supported.

By adjusting the adjusting part 47, the pressing force of the main elastic body 43 which presses the planar 37 sideways changes, and this main elastic body 43 makes the planar 37 move downward (lateral direction). Press and hold

The predetermined distance G is maintained at the side end of the planar 37 and the side end of the output side 35.

In this case, the shaft end of the output outlet 35 abuts against the shaft end of the planar 37 so that the gap G does not exist as shown in FIG. 4 or FIG.

This occurs when it is pressed by the output shaft 35 of the planar 37 and the output part 18. FIG.

The outer shaft active part 48 in the form of a ring is positioned in contact with the upper end of the portion 49 at the lower part of the planar 37 and is fixed to the planar 37 as a result.

The upper part of the planar 37 has a screw, 50, and the adjustment part 51 is screwed so that adjustment is possible.

The cylindrical magnet 52 is provided inside the outer active part 48, and the inner active part 53 falls apart at an inner side of the outer active part 48, and supports the vertical arm 54 supporting the inner active part 53. ) Is integrally formed with the horizontal arm 55.

The inner acting portion described above by inserting a guide pin 56 (see FIGS. 6, 7 or 8) provided in the upper portion of the horizontal arm 55 into the hole 58 formed in the attachment base 57 ( 53) is made.

In addition, the upper surface of the horizontal arm 55 is positioned on the lower surface of the attachment base 57.

A cylindrical magnet 59 having magnetic poles magnetized in the same direction as the polarization of the N · S stimulus of the above-described magnet (hereinafter referred to as the outer magnet of the magnet 52) outside the inner active part 53 described above. (Hereinafter, this magnet 59 will be referred to as an inner magnet).

Next, the configuration of the switch 170 will be described. The movable contact piece 60 constituting the switch portion is formed by processing, for example, a phosphor bronze plate for spring into a U shape.

As shown in detail in FIG. 6 and the like, this movable contact piece 60 has one end free and the other end fixed to the attachment base 57.

Therefore, the part which protruded on the upper surface of the attachment base 57 becomes the power supply terminal 61. FIG.

Moreover, the movable contact 62 is being fixed to the flow end of this movable contact piece 60 which becomes a U-shape.

Moreover, the fixed contact piece 63 which comprises the switch part 17 is bent and fixed to the attachment base 57, and the part which protruded on the upper surface of the attachment base 57 is the power supply terminal 64. As shown in FIG.

The fixed contact indicated by reference numeral 65 is fixed to the fixed contact piece 63 opposite to the movable contact 62 described above.

In addition, as shown in FIG. 6 or FIG. 7, the gap G ₃ is maintained between the free end and the lower surface of the attachment base 57 by the movable contact 62 of the movable contact piece 60. ₃ ) contains the horizontal arm 55.

The inner side active part 53 is prevented from vibrating horizontally by inserting the aforementioned guide pin 56 into the free hole 58 of the attachment base 57 so that the inner side active part 53 is movable up and down. It is supported.

The aforementioned attachment base 57 is integrated with the upper base 38 and the support 66 described above, and these attachment base 57, the upper base 38, and the support 66 are preferably formed of synthetic resin. The arm 54, the horizontal arm 55, the guide pin 56, and the like may also be formed of synthetic resin. By doing so, electrical insulation becomes good and workability at the time of forming each component is also improved.

The auxiliary output section 67a of the idle driving prevention device 12 provided in the operation control device 10 is constituted by a lever 67.

Therefore, as shown in FIG. 3, FIG. 6, etc., this lever 67 is connected to the disk board 36 which comprises the output part 18 at the one end (lower end).

Moreover, the other end (upper end) of the lever 67 is ring-shaped as shown, and is in contact with the upper surface of the inner side active part 53. As shown in FIG.

In addition, the lever 67 passes through the guide portion 68 and the guide hole 69 formed in the upper base 38 having a hole provided in the middle of the support 66, and the guide portion 68 and the guide hole 69 Is guided when the lever 67 moves in the vertical direction and prevents the lever 67 from vibrating left and right.

When the operation control apparatus 10 operates as the idle driving prevention device 12, the above-mentioned lever 67 constituting the auxiliary output section 67a of the idle driving prevention device operates as follows.

First, when the combined displacements of the diaphragms 19 and 20 of the input detection unit 16 detecting the pressures of the suction side and the discharge side of the pump 1 are transmitted to the output unit 18, the output unit 18 may be configured. The lever 667 bonded to the disk plate 36 moves in the vertical direction in accordance with the movement of the output unit 18.

For example, when the lever 68 moves downward (the pressure detection unit 16 side), the end portion of the lever 68 in a ring shape abuts on the upper surface of the inner active part 53, and the inner active part 53. Since presses down, the horizontal arm 55 which is integrated with the inner side active part 53 presses the movable contact piece 60 downward.

As a result, the movable contact 62 and the fixed contact 55 of the switch unit 17 are opened.

When the idle driving prevention device operates in this way to open and close the switch unit 17, the driving and stopping of the pump driving motor 14 are controlled.

However, when air enters the suction pipe 3, the pump driving motor 14 is stopped.

In addition, in one embodiment of the present invention, the movement transmitted from the pressure detecting unit 16 is transmitted to the output unit 18, and the movement at the output unit 18 is used as the switch unit 17 of the idle control device 10. The lever 67 constituting the auxiliary output portion 67a of the idle driving prevention device 10 is connected to the disk plate 36 when it is transmitted to each of the working contacts 62 and 65, but for example, the lever 67 ) May be joined to the output shaft 35 as shown by the dotted line in FIG.

In addition, of course, the lever 67 is not limited to the disk plate 36 but may be bonded to the movable pressing plate 23, for example.

Alternatively, the switch unit 17 may be opened by another method without using the lever 67.

For example, a rope or the like may be connected to the inner active part 53 to open the switch 17.

The cover indicated by 70 is attached to the upper end of the upper base 38 to surround the switch 17 and the like to protect the whole.

The cover 70 may be formed to extend to the bottom of the upper base 38 so that the cover 70 can be worn around the outer circumference of the upper base 38.

The cover 70 may be made of synthetic resin.

In Fig. ₁ , the reference numeral h ₁ denotes a wick, the reference numeral h ₂ denotes a pressure peak, the reference numeral h ₃ denotes a water level, and the reference numeral H denotes a full head.

Next, when the operation control device 10 of the automatic well pump is configured as described above, the operation state of the operation control device 10 will be described.

First, water is sucked in prior to the operation of the pump 1, but in this case, the pump 1 is not operated yet, so that the negative pressure chamber 30 and the pressure chamber 28a of the operation control device 10 are not operated. There is no pressure applied.

For this reason, each diaphragm 19, 20, the side force part 18, and the whole pressure detection part 16 are pressed down by the elastic body 42. As shown in FIG.

Although this state is shown in FIG. 3, in this case, since the lever 67 of the idle driving prevention apparatus 12 descends with the output part 18, the inner side active part 53 is pressed down.

Therefore, the movable contact piece 60 is pulled downward by the vertical arm 55 which is integrally operated with the inner active part 53, so that each contact point 62, 65 of the switch part 17 is placed in an open state.

Next, when the start of the pump 1 is started by closing the start switch 15 (see FIG. 2) before starting the operation of the pump 1, the pump 1 starts pumping after a few minutes.

In this case, the suction side diaphragm 20 in contact with the negative pressure chamber 30 of the operation control device 10 receives a negative pressure corresponding to the suction chamber h ₁ (see FIG. ₁ ) in the suction pipe 3. Detect and displace upward.

At the same time, the lever 67 joined to the disc plate 36 of the output unit 18 moves in the same direction in response to the displacement, thereby releasing the pressing of the inner slider 53.

The inner magnet 59 provided on the inner slider 53 is magnetized in the same direction as the outer magnet 52 provided on the outer slider 48.

Therefore, each magnet 52, 59 will be repulsed.

Then, as the outer slider 48 is controlled to descend from the place 49 of the planar 37, the repulsive force generated between the magnets 52 and 59 moves the inner slider 53 upward.

As a result, the horizontal arm 55 which operates integrally with the inner slider 53 releases the movable contact piece 60 from being pulled down, and at the same time, the contact 65 of the movable contact piece 60 and the contact point 65 of the fixed contact piece 63. ) Is closed and the start switch 15 is opened.

At the same time, when the pump 1 is operated, pumping water is delivered via the pressure bank 2, so that an internal pressure corresponding to the pressure is generated in the pressure tank 2, and thus the pressure chamber 28a discharges pressure during operation of the pump 1 Is being applied. In this case, during operation of the pump 1, each diaphragm 19, 20 detects and displaces the pressure of each chamber 30, 28a, and is placed in the state shown in FIG.

Therefore, under the condition shown in FIG. 4, operation of the pump 1 is continued.

In more detail, when the pump 1 is operated, each diaphragm 19, 20 of the pressure detector 16 is displaced so that the combined displacement of each diaphragm 19, 20 is transmitted to the output 18.

At the same time, the entire output portion 18 shifts from the state shown in FIG. 3 to the state shown in FIG. 4 with respect to the elastic body 42, and the entire output portion 18 moves upward.

In this case, the output shaft 35 constituting the output unit 918 abuts against the shaft end of the planar 37 to indicate the presence of the gap G held between the shaft end of the planar 37 and the shaft end of the output shaft 35. And push the planar 37 upwards (axially) (see Figure 4).

However, as long as the pressure on the discharge side of the pump 1 (the pressure in the pressure tank 2 in the first embodiment of the present invention) does not reach the opening pressure of the operation control apparatus 10, the output shaft 35 is the planar 37. It simply contacts the end of the output shaft 35 so that the output shaft 35 does not press the planar 37 again to open the switch section 17.

Therefore, in the case where the operation control device 10 operates as the pressure switch 11, for example, the water discharge valve 9 provided on the distal end side of the discharge pipe 8 is closed, so that the pressure at the discharge side of the pump 1 becomes a pressure switch. The pump 1 continues to operate unless the opening pressure of the operation control apparatus 10 operating as (11) becomes.

In this case, in the state where the pump 1 is operating, the operation control apparatus 10 is in the state shown in FIG.

Next, when the open state of the water supply 9 provided at the distal end of the discharge pipe 8 is reduced and the amount of water used is reduced, the pressure in the pressure tank 2 increases accordingly.

Thus, when the hydrant 9 is then locked, the pressure in the pressure tank 2 rises again, so that the discharge-side diaphragm 19 contained in the pressure chamber 28a in the operation control device 10 detects the elevated pressure and displaces it again. .

Then, the discharge pressure applied to the discharge side diaphragm 19 and the suction pressure applied to the suction side diaphragm 20, that is, a force corresponding to the total head H (see FIG. 1), are combined to produce an output portion ( 18).

At the same time, the entire output unit 18 moves upward.

As a result, in accordance with the movement of the output part 18, it moves to the output shaft 35 which comprises this output part 18. As shown in FIG.

The output shaft 35, which is in contact with the end of the planar 37, thus causes the planar 37 to be folded back in the same direction (axial direction) as the output side moves.

When the planar 37 is pressed (pressurized) by the output shaft 35 to face the main elastic body 43, it is provided on the outer slider 48 and the outer slider 48 fixed to the planar 37. The outer magnet 52 is integrated with the planar 37 to move in the same direction as the planar 37.

Accordingly, the outer slider 52 is displaced (moved) in the upward direction with respect to the inner magnet 59 that is pressed against the side of the attachment base 57. In this case, when the inner magnet 59 and the outer magnet 52 reach the same horizontal plane (the outer magnet 59 is displaced upward and exceeds the dead point where the dead magnet becomes a dead point, the inner magnet ( The upward force acting on 59) changes downward at a time with respect to the dead point.

Then, the inner slider 53 descends in an extremely short time of less than one second, and at the same time, the horizontal arm 55 installed on the inner slider 53 moves the movable contact 60 to operate at the fixed contact 65. The contact 62 is pulled out to turn off the power.

As a result, the operation of the pump driving motor 14 is stopped and thus the operation of the pump 1 is stopped.

In the state where the operation control device 10 is operated in this manner and the pump 1 is stopped, the control device 10 is in the state shown in FIG.

That is, the state shifts from the state shown in FIG. 4 to the state shown in FIG.

Next, when the water supply 9 installed at the end of the discharge tube 8 is improved and water is started to be used, the water in the discharge tube 8 and the pressure tank 2 is discharged through the water supply 9 at the same time. With the release of water, the pressure in the tank 2 drops.

For this reason, the discharge pressure of the pump 1 applied to the discharge side diaphragm 19 in the operation control apparatus 10 falls, and the force acting on the output part 18 through each diaphragm 19 and 20 reduces.

Then, the whole output part 18 moves downward and the output shaft 35 of the output part 18 also moves downward.

As a result, when the upper end of the output shaft 35 falls from the lower end of the planar 37, and the space | interval G arises between the ends, the force which pushes the planar 37 upward is released.

For this reason, the planar 37 is pushed downward by the main elastic body 43.

When the planar 37 is pushed and moved downward, the planar 37 and the outer slider 52 which operates in a closed manner, and the outer magnet 59 provided on the outer slider 52 also move in the same direction. do.

Therefore, as already described in this specification, after passing through the dead point, the inner slider 53 moves upwardly and at the same time the inner slider 53 ends at the lower surface of the attachment base 57.

And the horizontal arm 55 which moves together with the inner slider 53 at the same time as the inner slider 53 moves upward releases | releases pressing the movable piece 60 now.

As a result, as shown in FIG. 7, the movable contact 60 returns to the position of the surface bottom and the movable contact 62 comes into contact with the fixed contact 65. In the state shown in Fig. 1, the operation of the pump driving motor 14 is started and the pump 1 starts pumping (see Fig. 5).

When the operation control device 10 operates as the pressure switch 11, the above-described series of operations are repeated.

In this case, when the operation control device 10 of the automatic well pump is operating as the pressure switch 11 as described above, the operation control device 10 again functions as an idle driving prevention device 10, and thus its operation. Will be Next, when the control device 10 operates as the idle operation preventing device 12 as an operation state of the operation control device 12, the pump 10 is operated under the state where the pump 1 is operating first. The pressure on the discharge side of the is high.

For this reason, the pressure of the discharge side of the pump 19 is always applied to the discharge side diaphragm 1 of the operation control apparatus 19, and this discharge side diaphragm 18 is displaced so that the output part 1 may always be pushed up.

That is, as described earlier in this specification, when the pump 1 is in operation, each diaphragm 19 and 20 of the pressure detecting unit 16 which detects the pressure on the discharge side of the pump 16 is displaced and each diaphragm ( The combined displacements of 19 and 200 are intended to be transmitted to the output 18.

Therefore, the whole output part 18 is moving upwards in the state in which the pump 1 is operating.

Even when the pump 1 is not in operation now, that is, in the stopped state, the pressure on the discharge side of the pump 1 becomes high and is applied to the discharge side diaphragm 19 so that the output unit 18 is of course in the above-described state. .

Therefore, although the above description demonstrated that the output part 18 moved upwards when the pump 1 is operating, it is not limited only to the case where the pump 1 is operating.

When the entire output part 18 is moved upward, the lever 67 of the idle driving prevention device 12 which is in contact with the disk plate 36 constituting the output part 18 is upwardly like the output part. And the end of the annular lever 67 is separated from the upper surface of the inner slider 53.

For this reason, since the internal slider 53 cannot be extended by the lever 67 of the idle operation prevention apparatus 12, each contact 62 and 65 of the switch part 17 cannot be opened, and the pump 1 Continue driving. Next, if the water level of the well decreases or the connection of the suction pipe 3 (not shown) sucks in air or the like, the suction pipe 3 is at atmospheric pressure, while the discharge side of the pump 1 is also at atmospheric pressure. .

In such a state, there is no pressure difference between each chamber in the operation control apparatus 10 operating as the idle operation preventing apparatus 12, that is, the negative pressure chamber 30 and the pressure chamber 28a. The force to push up is also released.

Then, the entire output portion 18 is lowered down by the elastic body 42 and the main elastic body 43, and at the same time, the lever 67 of the idle driving prevention device 12 is also accompanied by the lowering of the output unit 18. Since the lever 67 moves in the same direction as the output unit 18, the lever 67 operates to knock down the inner slider 53.

As the inner slider 53 is lowered, the horizontal arm 955 which is operated integrally with the inner slider 53 lowers the movable contact piece 60.

As a result, as shown in FIG. 8, the movable contact 62 and the fixed contact 65 are opened to stop the operation of the pump driving motor 14, and thus the operation of the pump 1 is also stopped.

When the operation control device 10 of the automatic well pump is operated as described above, the anti-operation device 12 provided in the operation control device 10 detects the pressure on the discharge side and the suction side of the pump 1. Since it is comprised so that operation | movement may be carried out, the operation | movement of the idling prevention apparatus 12 can be ensured.

That is, when the operation control device 10 having the idle operation prevention device 12 that operates by detecting the pressures of the discharge side and the suction side of the pump 1, for example, the well water level is lowered or the water level is the pump 1 ), So that the suction side diaphragm 20 which detects the pressure (negative pressure) on the suction side of the pump 1 by the output unit 18, may lower the lever 67 of the idle control device 12. The pressure on the discharge side of the pump 1 prevents it even if the switch 17 is opened by displacing it.

In more detail, the discharge side diaphragm 19 which detects the pressure of the discharge side of the pump 1 is seized by the suction side diaphragm 20, and acts to push up the output part 18 reversely.

For this reason, since the whole output part 18 is pushed up according to the action of the discharge shaft diaphragm 19, the lever 67 of the idle driving prevention apparatus 12 which operates integrally with the output part 18 is the output part ( It cannot move in the same direction as 18) to open the switch 17.

Therefore, even when the well surface is low during use of the pump 1 or when the water surface is above the pump 1, the idle operation prevention device 12 provided in the operation control apparatus 10 malfunctions and the pump 1 is operated. Since the operation of the idle stop device can be assured.

As described above, in the construction of an operation control device having an idle operation preventing device, as described in the present invention, an idle operation prevention device for controlling the operation and stop of the pump driving motor by detecting the pressure on the suction and discharge sides of the pump An operation control device can provide an operation control device having an idle operation prevention device which is sure to operate without malfunction.

In addition, as in the first embodiment of the present invention, the pressure switch is provided with an anti-operating device for opening and closing the electric switch part at the output part for opening and closing the switch part according to the displacement of the pressure detection part for detecting the pressure between the suction side and the exposure side of the pump. In the case of the operation control device having the function and the function of the anti-driving device, the common use of each part is possible.

That is, as described earlier in this specification, the automatic well pump is generally equipped with a pressure switch and an anti-driving device separately.

For this reason, the work of attaching each device and the electrical wiring which connects each device was needed.

However, when the present invention is configured to have both functions as in the first embodiment, the above-mentioned conventional work is unnecessary and common use of each part is possible.

Therefore, according to one embodiment of the present invention can provide a simplified operation control device having the function of the pressure switch and the function of the anti-driving device.

In the description of one embodiment of the present invention has been shown an embodiment in the case of using the traction force of the magnet as a method of breaking the switch unit, for example, a method of quickly cutting using a spring or the like, as is generally known, of course In addition, of course, many modifications may be made without departing from the spirit of the present invention, and of course, the present invention was not limited to only one embodiment of the present invention.

Claims (1)

Of the first device 20 for detecting the pressure on the suction side of the pump and the second device 19 for detecting the pressure on the discharge side of the pump and the first device 20 and the second device 19 In the case where the controllers 17 and 18 control the operation of the pump according to the sum of the outputs, the controller 18 is a pump driving motor when both the suction side pressure and the discharge side pressure become atmospheric pressure. A driving control device for an automatic well pump having an idle driving prevention device (12) for stopping operation of (14).