JP2006283739A - Pump installation and its operating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump installation automatically operating alternately two or more submerged pumps by an inexpensive and simple structure with the number of float switches minimized. <P>SOLUTION: The first submerged pump 1 has the first float switch 10 for detecting a first operation starting water level L<SB>S1</SB>and a first operation stopping water level L<SB>E1</SB>, and is formed to start operation when detecting the first operation starting water level L<SB>S1</SB>and to stop operation when detecting the first operation stopping water level L<SB>E1</SB>. The second submerged pump 2 has the second float switch 20 for detecting a second operation starting water level L<SB>S2</SB>and a second operation stopping water level L<SB>E2</SB>, and the third float switch 30 for detecting an abnormal water level L<SB>A</SB>, and is formed to start operation by a rate of one per predetermined frequencies when detecting the second operation starting water level L<SB>S2</SB>, stop operation when detecting the second operation stopping water level L<SB>E2</SB>, and start operation when detecting the abnormal water level L<SB>A</SB>. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pump device, and more particularly to a pump device having a plurality of submersible pumps for transferring and draining sewage in a septic tank device or the like. The present invention also relates to a method for operating such a pump device.

  Conventionally, in septic tank devices and the like, submersible pumps for sewage are used for transferring and draining sewage. As such a submersible pump for sewage, there is a submersible pump equipped with a float switch for detecting the water level in the tank where the pump is installed, and an operation control circuit for operating / stopping the pump according to the water level signal of the float switch. Are known.

FIG. 1 is a schematic diagram showing a conventional pump device including two such submersible pumps. As shown in FIG. 1, the pump 201 includes a float switch 210 that detects the operation start water level L ₁ and a float switch 220 that detects the operation stop water level L ₂ . Pump 202 includes a float switch 230 for detecting the operation start level _{L 3,} the float switch 240 for detecting the operation stop level _{L 4,} a float switch 250 for detecting an abnormal water level _{L 5.}

Pump 201, the water level started operation to surpass operation start level L _1, is configured so as the water level to stop the operation and lower than the operation stop level L _2. The pump 202 starts operation at a rate of once every two times when the water level exceeds the operation start water level L ₃ , stops operation when the water level falls below the operation stop water level L ₄ , and the water level exceeds the abnormal water level L ₅ . And is configured to start operation. With this configuration, normal time the pump 201 and the pump 202 is automatically operated alternately, the pump 201 and the pump 202 is operated simultaneously when exceeded abnormal water level L _5.

  In such a conventional pump device, since a float switch that does not allow a large difference in height between on and off is used, the pump 201 needs two float switches 210 and 220 as shown in FIG. The pump 202 requires three float switches 230, 240, 250. Since such a float switch is relatively expensive, it is desired to reduce the cost of the pump device by reducing the number of float switches.

  The present invention has been made in view of such problems of the prior art, and can automatically and automatically operate a plurality of submersible pumps with an inexpensive and simple configuration in which the number of float switches is minimized. An object of the present invention is to provide a pump device and an operation method thereof.

  According to the first aspect of the present invention, there is provided a pump device capable of alternately and automatically operating a plurality of submersible pumps with an inexpensive and simple configuration in which the number of float switches is minimized. The pump device includes a first submersible pump and a second submersible pump. The first submersible pump has a first float switch that detects a first operation start water level and a first operation stop water level that is lower than the first operation start water level. The first submersible pump is configured to start operation when the first operation start water level is detected, and to stop operation when the first operation stop water level is detected. The second submersible pump has a second operation start water level at a position lower than the first operation start water level, and a position higher than the first operation stop water level and lower than the second operation start water level. A second float switch for detecting the second operation stop water level and a third float switch for detecting the abnormal water level at a position higher than the first start water level. The second submersible pump starts operation at a predetermined rate when the second operation start water level is detected, and operates when the second operation stop water level is detected. The operation is stopped and the operation is started when the abnormal water level is detected.

  In this case, it is preferable that the first submersible pump has a pump body, a cable that connects the first float switch to the pump body, and a cable support that can adjust the support position of the cable. . In this case, it is preferable that the cable support is configured such that the position in the vertical direction can be adjusted on a column attached to the pump body of the first submersible pump. The second submersible pump includes a pump body, a cable connecting at least one of the second float switch and the third float switch to the pump body, and a cable capable of adjusting a support position of the cable. It is preferable to have a support. In this case, it is preferable that the cable support is configured such that the position in the vertical direction can be adjusted on a support attached to the pump body of the second submersible pump.

  According to the second aspect of the present invention, there is provided a driving method of a pump device capable of automatically and alternately operating a plurality of submersible pumps with an inexpensive and simple configuration with a minimum number of float switches. . According to this method, the first operation start water level and the first operation stop water level at a position lower than the first operation start water level are detected by the first float switch of the first submersible pump. . The operation of the first submersible pump is started when the first operation start water level is detected, and the operation of the first submersible pump is stopped when the first operation stop water level is detected. By the second float switch of the second submersible pump, the second operation start water level at a position lower than the first operation start water level, and the second operation start higher than the first operation stop water level. A second shutdown water level that is lower than the water level is detected. When the second operation start water level is detected, operation of the second submersible pump is started once every predetermined number of times, and when the second operation stop water level is detected, the second Stop operation of the submersible pump. Further, the abnormal water level at a position higher than the first start water level is detected by the third float switch of the second submersible pump. When the abnormal water level is detected, the operation of the second submersible pump is started.

  Thus, according to the present invention, the number of float switches can be reduced to the minimum (three) in the pump device that automatically and alternately operates a plurality of submersible pumps, and the configuration of the pump device is simplified. At the same time, the cost can be reduced.

  Hereinafter, an embodiment of a pump device according to the present invention will be described in detail with reference to FIGS. 2 to 5, the same or corresponding components are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 2 is a schematic diagram showing a pump device according to an embodiment of the present invention. As shown in FIG. 2, the pump device includes two submersible pumps 1 and 2 that discharge water in the tank to the outside, and these submersible pumps 1 and 2 are tanks such as a septic tank into which dirty water flows. Is placed inside. The first submersible pump 1 has one float switch (first float switch 10), and the second submersible pump 2 has two float switches (second float switch 20 and third float switch 30). )have. Among these float switches, the first float switch 10 and the second float switch 20 are float switches having a large difference in height between ON and OFF, that is, switching between ON and OFF unless the attitude of the float is steep. What is not used is used. By using such a float switch with a large difference in height between ON and OFF, it becomes possible to detect the two water levels on the upper side and the lower side with one float switch.

In the present embodiment, the first float switch 10 detects an operation start water level (first operation start water level) L _{S1 at} which the operation of the first submersible pump 1 is started at the upper water level that is turned on, and is turned off. An operation stop water level (first operation stop water level) _{LE1 at} which the operation of the first submersible pump 1 is stopped is detected at the lower water level. Further, the second float switch 20 detects an operation start water level (second operation start water level) L _{S2 at} which the operation of the second submersible pump 2 is started at the upper water level that is turned on, and the lower side that is turned off. An operation stop water level (second operation stop water level) _{LE2 at} which the operation of the second submersible pump 2 is stopped at the water level is detected. The second operation start water level L _S2 is set to a position lower than the first operation start water level L _S1 , and the second operation stop water level L _E2 is set to a position higher than the first operation stop water level L _E1. Has been.

Third float switch 30 detects an abnormality water level L _A water level to be turned on. The abnormal water level L _A is set at a position higher than the operation start level L _S1 of the first float switch 10. As described above, since the third float switch 30 only needs to detect one water level, a float switch that does not allow a large difference in height between on and off may be used.

When the water level in the tank in which the submersible pumps 1 and 2 are installed exceeds the first operation start water level L _S1 , the first float switch 10 is turned on, and the first float switch 10 receiving the ON signal is received. The control unit of the first submersible pump 1 starts the operation of the first submersible pump 1. Further, when the water level falls below the first shutdown water level L _E1 , the first float switch 10 is turned off, and the control unit of the first submersible pump 1 that receives the off signal of the first float switch 10 The operation of the first submersible pump 1 is stopped.

Further, when the water level in the tank exceeds the second operation start water level L _S2 , the second float switch 20 is turned on. The control unit of the second submersible pump 2 that has received the ON signal of the second float switch 20 starts the operation of the second submersible pump 2 at a rate of once every predetermined number of times. In the present embodiment, the second submersible pump 2 is set to start operating at a rate of once every two times.

When the water level in the tank falls below the second shutdown water level L _E2 , the second float switch 20 is turned off, and the control unit of the second submersible pump 2 that receives the off signal of the second float switch 20 Then, the operation of the second submersible pump 2 is stopped. Further, when the water level exceeds the abnormal level L _A, third float switch 30 is turned on, the second control unit of the submersible pump 2 which has received the on-signal of the third float switch 30, the second water pump If 2 is stopped, operation is started.

  Next, the operation of the pump device having such a configuration will be described with reference to FIG. FIG. 3 is a timing chart showing the operation of the pump device shown in FIG. 2 and changes in the water level in the tank.

First, it is assumed that the water level in the tank in which the submersible pumps 1 and 2 are installed is between the second operation start water level L _S2 and the second operation stop water level _LE2 . In this state, when water flows into the tank and the water level rises and exceeds the second operation start water level L _S2 , the second float switch 20 is turned on, and the operation of the second submersible pump 2 is started. (P ₁ ). The water in the tank is discharged by the operation of the second submersible pump 2, and the water level in the tank is lowered. When the water level by the discharge of water in the tank falls below a second operation stop level L _E2 decreases, the second float switch 20 is turned off, operation of the second water pump 2 is stopped (P ₂₎ .

In this state, when the water flows into the tank and the water level in the tank rises and exceeds the second operation start water level L _S2 , the second float switch 20 is turned on. Since the operation of the second submersible pump 2 is set to start at a rate of once, the operation of the second submersible pump 2 is not started this time (P ₃ ). When the water level further rises and exceeds the first operation start water level L _S1 , the first float switch 10 is turned on, and the operation of the first submersible pump 1 is started (P ₄ ). The water in the tank is discharged by the operation of the first submersible pump 1, and the water level in the tank is lowered. When the water level by the discharge of water in the tank is below a first operation stop level L _E1 decreases, the first float switch 10 is turned off, the first operation of the water pump 1 is stopped (P ₅₎ .

In this state, when water flows into the tank, the water level in the tank rises and exceeds the second operation start water level L _S2 , the second float switch 20 is turned on, and the second float switch 20 is turned on in the same manner as described above. The operation of the submersible pump 2 is started (P ₆ ). In this way, the first submersible pump 1 and the second submersible pump 2 are automatically operated alternately.

As described above, when the water level in the tank exceeds the first operation start water level L _S1 , the operation of the first submersible pump 1 is started, but the amount of water flowing into the tank is determined by the first submersible pump 1. If the amount of water discharged is exceeded, the water level in the tank will continue to rise. However, when the water level in the tank exceeds the abnormal level L _A, third float switch 30 is turned on, the operation of the second water pump 2 is started (P _7). Accordingly, both the first submersible pump 1 and the second submersible pump 2 are operated, and the water in the tank is discharged.

When the water level in the tank is lowered by the operation of the two submersible pumps 1 and ₂ and falls below the second operation stop water level _LE2 , the second float switch 20 is turned off, and the operation of the second submersible pump 2 is performed. Is stopped (P ₈ ). The first submersible pump 1 is operated as it is, and when the water level falls below the first operation stop water level _LE1 , the first float switch 10 is turned off, and the operation of the first submersible pump 1 is stopped (P ₉ ). Thus, when the water level in the tank exceeds the abnormal level L _A, 2 units of water pumps 1 is made to be able to be operated at the same time, to discharge a large amount of water.

  As described above, the pump device of this embodiment can alternately and automatically operate a plurality of submersible pumps with the minimum (three) float switches. Therefore, the configuration of the pump device can be simplified and the cost can be reduced.

  Here, the first float switch 10 is connected to the pump body 14 of the first submersible pump 1 by a cable 12, and the cable 12 is supported by a cable support 16. The second float switch 20 is connected to the pump body 24 of the second submersible pump 2 by a cable 22, and the cable 22 is supported by a cable support 26. The third float switch 30 is connected to the pump body 24 of the second submersible pump 2 by a cable 32, and this cable 32 is supported by a cable support 36. These cable supporters 16, 26, and 36 are configured so that the support positions of the respective cables 12, 22, and 32 can be adjusted. Moreover, the cable support 16 is comprised so that adjustment of the position of an up-down direction is possible on the support | pillar 18 attached to the pump main body 14 of the 1st submersible pump 1, and the cable support 26 and 36 is 2nd. The position in the vertical direction can be adjusted on the support column 28 attached to the pump body 24 of the submersible pump 2.

  FIG. 4A is a plan view showing the cable support 16 of the first submersible pump 1, and FIG. 4B is a longitudinal sectional view. As shown in FIGS. 4A and 4B, the cable support 16 includes a ring portion 16a that is fixed to a column 18 attached to the pump body 14, and a protruding portion 16b that protrudes from the ring portion 16a. And a locking screw 16c for locking the ring portion 16a at a predetermined vertical position on the support column 18. As shown in FIG. 4B, the protruding portion 16b has a bifurcated structure divided into two upper and lower portions, and an insertion hole 16d through which the cable 12 is inserted is formed at the root of the bifurcated portion.

With such a configuration, the cable 12 is inserted into the insertion hole 16d of the cable support 16, the cable 12 is adjusted to an appropriate length, and the fixing screw 16e is tightened so that the support position of the cable 12 can be adjusted. It has become. Thus, by adjusting the support position of the cable 12, the positions of the first operation start water level L _S1 and the first operation stop water level L _E1 can be adjusted. In addition, since the cable support tools 26 and 36 of the 2nd submersible pump 2 are the same structures as the cable support tool 16 mentioned above, description is abbreviate | omitted here.

  FIG. 5 is a longitudinal sectional view showing an example of a submersible pump that can be used in the pump device of the present invention. The submersible pump shown in FIG. 5 includes a motor unit 100 that houses a motor therein, and a pump unit 104 that houses an impeller 102 therein. A main shaft 106 is inserted into the motor unit 100 and the pump unit 104, and an impeller 102 that rotates integrally with the main shaft 106 is attached to the lower end of the main shaft 106. Thereby, the power of the motor unit 100 is transmitted to the impeller 102 of the pump unit 104.

  The pump unit 104 includes an upper casing 108 having a discharge port 108a and a lower casing 110 having a suction port 110a. The upper casing 108 and the lower casing 110 are fixed by a tapping screw 112. The upper casing 108 is formed of a resin material made of ABS resin, PA resin, and 30% glass fiber. The impeller 102 described above is accommodated in a pump chamber 112 formed by the upper casing 108 and the lower casing 110.

  A mechanical seal 114 for preventing the pressure water of the pump unit 104 from leaking and entering the motor unit 100 is provided on the upper portion of the upper casing 108 of the pump unit 104. As the lower sliding material of the mechanical seal 114, SiC or ceramic is used. The motor core of the motor unit 100 is downsized. For example, a motor core having a diameter of 95 mm and a length of 40 mm is used. A miniature thermal protector 115 is attached to the coil portion of the motor portion 100.

  The upper surface of the motor unit 100 is covered with a motor cover 116, and a float switch 118 is attached to the motor cover 116. A power cable 120 and a cable 122 extending from the float switch 118 are attached to the top of the motor cover 116. As these cables 120 and 122, those having resistance to chlorine are used. A resin-made bundle band 124 is attached between the cables 120 and 122 at the top of the motor unit 100. This bundle band 124 can be used as a handle when carrying the submersible pump. Such a bundle band 124 is preferably configured so that the size of the ring portion can be adjusted when it is attached.

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

It is a schematic diagram which shows the conventional pump apparatus. It is a schematic diagram which shows the pump apparatus in one Embodiment of this invention. It is a timing chart which shows operation | movement of the pump apparatus shown in FIG. 2, and the change of the water level in a tank. 4A is a plan view showing a cable support in the pump apparatus shown in FIG. 2, and FIG. 4B is a front view. It is a longitudinal cross-sectional view which shows an example of the submersible pump which can be used for the pump apparatus of this invention.

Explanation of symbols

L _S1 first operation start water level L _S2 second operation start water level L _E1 first operation stop water level L _E2 second operation stop water level L _A abnormal water level 1, 2 submersible pump 10 first float switch 12, 22 Cable 14, 24 Pump body 16, 26 Cable support 18, 28 Post 20 Second float switch 30 Third float switch

Claims (6)

A first submersible pump having a first float switch for detecting a first operation start water level and a first operation stop water level at a position lower than the first operation start water level;
A second operation start water level that is lower than the first operation start water level, and a second operation stop water level that is higher than the first operation stop water level and lower than the second operation start water level. And a second submersible pump having a third float switch for detecting an abnormal water level at a position higher than the first starting water level;
With
The first submersible pump is configured to start operation when the first operation start water level is detected, and to stop operation when the first operation stop water level is detected;
The second submersible pump starts operation at a predetermined rate when the second operation start water level is detected, and operates when the second operation stop water level is detected. A pump device configured to stop and start operation when the abnormal water level is detected.   The first submersible pump includes a pump main body, a cable connecting the first float switch to the pump main body, and a cable support that can adjust a support position of the cable. The pump device according to 1.   The pump device according to claim 2, wherein the cable support is configured to be capable of adjusting a vertical position on a support attached to a pump body of the first submersible pump.   The second submersible pump includes a pump main body, a cable connecting at least one of the second float switch and the third float switch to the pump main body, and a cable support capable of adjusting a support position of the cable. The pump device according to any one of claims 1 to 3, wherein the pump device is provided.   The pump device according to claim 4, wherein the cable support is configured to be capable of adjusting a vertical position on a support attached to a pump body of the second submersible pump. The first float switch detects a first operation start water level and a first operation stop water level that is lower than the first operation start water level,
Starting the operation of the first submersible pump when the first operation start water level is detected;
Stopping the operation of the first submersible pump when the first shutdown water level is detected;
By the second float switch, the second operation start water level at a position lower than the first operation start water level and the position higher than the first operation stop water level and lower than the second operation start water level. Detect a second shutdown water level,
When the second operation start water level is detected, the operation of the second submersible pump is started at a rate of once every predetermined number of times,
Stopping the operation of the second submersible pump when the second shutdown water level is detected,
An abnormal water level at a position higher than the first starting water level is detected by a third float switch,
An operation method of a pump device, wherein the operation of the second submersible pump is started when the abnormal water level is detected.

Images