KR970006780Y1 - Automatic operating starting and stopping pump - Google Patents

Abstract

none

Description

Automatically start and stop pumping device

1 is a perspective view showing an embodiment of a pump device according to the present invention

2 is a flow-pressure characteristic diagram of a conventional pump device

3 is a block circuit diagram of an embodiment of the present invention.

4 is a flow-pressure characteristic diagram when one pump head is used in the present invention.

5 is a flow-pressure characteristic diagram when two pump heads are used in the present invention.

6 is a flowchart when one pump head is automatically operated according to the present invention.

7 is a flowchart when the suction height of one pump head is manually set in the present invention.

8 is a flowchart when two pump heads are operated according to the present invention.

Explanation of symbols on the main parts of the drawings

2, 3: pump head 10: pressure sensor

12: control box 17: microcomputer (control device)

19: External terminal

The present invention relates to a pump device that automatically starts, stops, starts parallel operation, releases parallel operation, etc. according to the opening and closing of a water supply. More specifically, the pump device effectively controls the characteristics between the flow rate and the pressure of the pump head. It relates to a pump device for supplying water.

Conventional pump apparatuses generally start or stop the pump head by a pressure switch or a combination of a pressure switch and a flow switch of a flow switch. The pressure switch opens and closes the contacts used to start and stop the operation of the pump head by the difference between the internal pressure of the pump system and the spring set pressure of the pressure switch. It is difficult to reduce the pressure, and the pressure adjustment range of the pressure switch is limited because the pressure setting of the pressure switch is caused by the spring force. In addition, the height from the center of the pump head to the highest water supply faucet, the so-called rolling height, is slightly smaller than the closed pressure of the pressure switch. In other words, the actual water pressure or the closed pressure of the pressure switch is not higher than the water level from the center of the pump head to the super high power faucet, and water is not discharged from the high water faucet even when the water supply is opened.

As described above, as shown in FIG. 2, for example, a conventional pump device having a maximum total head liftable height of the pump Htmax, from the pump device to the water surface, When the so-called suction height is installed at the HS, the pressure switch of the pump device is turned on at the closed pressure HON, and when it is turned off at the open pressure HOFF, the pressure between the HON and the HOFF is in a range that can be pressed, and the raising height is HON. Further, even if the pump device as described above is provided at the suction height HS ', the energy of the pressure range between HS and HS' is the same as the range that can be pressed and the pressure height is wasted.

The conventional technique for detecting the flow rate of the pump apparatus in the form of pressure is, for example, Japanese Patent Application Publication No. 59- (1984-720) issued on January 7, 1984 (name of the invention: Control of a pressure tank type water supply device). Device is shown in FIG. 1.

That is, according to the above-mentioned prior art, even if the suction height is changed, the pressure is fixed at the closed pressure corresponding to the water pressure at which the pressure switch is turned off, and thus there is a problem that the pump capacity is used in a state where the capacity of the pump is not sufficiently exhibited.

The object of the present invention is to automatically set the plate height without using the pressure switch used in the conventional pump device, even if the pump device located at the first place has a constant pressure level and the suction height is different from the first place. It is possible to provide a pump device with a general purpose that can be changed to the present invention, and exhibits the capability of the pump sufficiently and eliminates waste of energy.

In order to achieve the above object, the pump device of the present invention automatically determines the operation start pressure and the operation stop pressure according to the pressure sensor for detecting the pressure in the discharge pipe connected to the pump head and the maximum pressure pressure detected by the pressure sensor. Use control devices that can

According to the present invention, even if the pump device having a certain pressure height in the first place is installed in a place where the suction height is different from the first place without using the pressure switch used in the conventional pump device, the suction height is automatically set. Therefore, the pump device of the present invention automatically determines the operation start pressure and the operation stop pressure according to at least one of the maximum pressure rise pressure, the suction height and the maximum total head.

Next, an embodiment of a pump device according to the present invention will be described in detail with reference to the drawings.

In FIG. 1, two pump heads 2 and 3 are mounted on a common bed 1 of a pump device, and each pump head 2 and 3 is provided with a water tank through suction pipes 4 and 5. (6).

The downstream sides of the pump heads 2 and 3 are connected to the water supply 9 through the merging plate 7 and the discharge tube 8, respectively. The pressure sensor 10 and the pressure tank 11 are provided in the upper part of the confluence | pipe 7. On the common bed 1, a control box 12 is provided.

In the control box 12, as shown in FIG. 3, the terminal block 15 for connecting the power supply 13 and the motor 14, the switch 16 for opening and closing the circuit of the motor 14, and various types described later. The microcomputer 17 which is a control apparatus which controls the switch 16 according to an input signal is provided. As the input information to the microcomputer 17, the pressure sensor 10 for detecting the pressure in the discharge tube 8, the current transformer 18 for detecting the current flowing through the motor 14, and the suction height are set manually. External terminals 19 and the like. As the output information from the microcomputer 17, a display lamp 20 indicating an abnormality such as an overcurrent of the motor 14 or idle operation of the pump heads 2 and 3 and a motor connected to the pump head according to the present invention described later. And a switch 16 for controlling 14.

4 and 6, the microcomputer 17 outputs a command and starts in step 21, and then in step 22, water is not discharged from the water supply 9, that is, the water supply 9 is completely closed. The pump apparatus is operated to detect the maximum normal pressure Hd by the pressure sensor 10. The input signal Hd from the pressure sensor 10 to the microcomputer 17 is stored in a memory (not shown) in steps 22 and 23. In step 24, the operation stop pressure Hd2 of the pump head 2 or 3 is calculated by the equation Hd-x, and the operation start pressure Hd1 is calculated by the equation Hd2-y. Here, as shown in Fig. 4, x is a predetermined small value corresponding to Hd-Hd2, and y is a predetermined small value corresponding to Hd2-Hd1. In step 25, the water supply 9 is opened.

When the pressure of the pump head of the pump head is Hdv, it is determined in step 26 whether Hdv ≦ Hd1 is applied. If the determination result is Hdv ≦ Hd1, the flow proceeds to step 27. If Hdv ≦ Hd1 is not determined, it is determined again whether Hdv ≦ Hd1. In step 27, the pump head starts. In step 28, it is determined whether Hdv < Hd2. If the discrimination result in step 28 is YES, the process proceeds to step 29. If the discrimination result in step 28 is NO, discrimination is made again in step 28. After the pump head stops in step 29, this flow is reset in step 30. According to the system shown in Fig. 6, the pump operation start pressure Hd1 is automatically set within the range of Htmax to Hs1, and the operation stop pressure Hd2 is automatically set to a value larger than HD1. When the pump head 2 or 3 is installed at another place of the suction height Hs2, for example, the maximum pressure of the pressure is H'd (Hd + H). The maximum pressure phase pressure Hd 'is detected by the pressure sensor 10, read out, and then stored in the control apparatus as in steps 22 and 23. The operation start pressure Hd1 'and the operation stop pressure Hd2' are calculated according to the maximum summation pressure Hd 'as in step 24. The pump head 2 or 3 is operated and stopped in accordance with the operation start pressure Hd1 'and the operation stop pressure Hd2.

In FIG. 7, after the system starts in step 21, the suction height Hs when the pump device is installed in the water tank 6 shown in FIG. 1 is measured or estimated manually by the suction height Hs in step 31. The suction height Hs read out by observation and observed in the external terminal 19 shown in FIG. 3 in step 32 is set. In step 34, the operation stop pressure Hd ₂ and the operation start pressure Hd ₁ are calculated by the microcomputer 17. Next, the flow of steps 25 to 30 is as shown in FIG. According to the system shown in FIG. 7, when the actual suction height Hs ₁ at the time of installation of the pump device is set via the external terminal 19, as in the case of FIG. 6, the starting pressure Hd ₁ is set to H _tmas to Hs ₁ . It is set automatically within the range, and the operating pressure Hd ₂ is automatically set to a value larger than Hd ₁ .

5 and 8, steps 21 to 23 in the automatic operation of FIG. 8 are the same as those in FIG. The two cases of the pump case of the parallel operation of the head of the pump head operation is stopped for the H _OFF1, one single pump head and the operating pressure of the pump head driver stops the H _POFF1, cause the pump head 1, a pressure of the operation start of the operation pressure H _ON1, For parallel operation of two pump heads, the starting pressure of the pump head shall be H _PON1 , x> x ₁ , y> y ₁ . The microcomputer 17 performs the same calculation as in step 35. H _OFF1 = H _POFF and H _ON1 = H _PON1 . When the water supply 9 is opened in step 25, Hdv? H _PON1 is discriminated in step 36. If the discrimination result in step 36 is YES, then one pump head is operated in step 37. If the discrimination result in step 36 is NO, the discrimination in step 36 is repeated. In step 38, Hdv < = H _PON1 is discriminated. If the discrimination result in step 38 is YES, parallel operation by two pump heads is performed in step 39, and if the discrimination result is NO, discrimination is performed in step 42. If the discrimination result in step 40 is YES, one pump head is stopped. If the discrimination result in step 42 is YES, the two pump heads are stopped.

The suction heights Hs1 of the two pump heads are read out by observation, set to the external terminal 19 by manual operation, and steps 22 and 23 in FIG. 8 are performed as in step 33 in FIG.

Steps 21 to 44 are as described above.

If the pump head is a fifth degree and 8 degree embodiment Hs ₁ than H by wicking height is set to a small Hs ₂ shown in, the center of the pump head to go to Hs ₂ H _on2, H _offn2 and H _pon2 and H _POFF2 It is greater than H by _{ON1, OFF1} H, H H _{POFF1 PON1} and H, respectively.

As described above, H _S1 or H _S2 is input to the microcomputer 17 from the external terminal 19 according to the actual suction height, and the operation start pressure H _ON1 or H _ON2 , the operation stop pressure H _OFF1 , or H _{OFF2 in} parallel The starting pressure H _PON1 or H _PON2 and the parallel operating stop pressure H _POF1 or H _POFF2 are determined respectively.

When the water supply 9 opens, the pressure in the pump head decreases, and when the pump head reaches H _ON1 or H _ON2 , the pump head starts operation. After that, the pump head is closed to raise the pressure, and H _OFF1 or H _OFF2. At this point, the pump head is automatically stopped. Further, when the pressure reaches H _PON1 or H _PON2 smaller than H _ON1 or H _{ON2 due} to the discharge of water from the water supply 9 after the start of operation of one pump head, the parallel operation start command of the pump head is _issued to the microcomputer 17 ) Is output from the pump head (2, 3) to operate.

As described above, according to the present embodiment, the actual suction height is input to the microcomputer 17 by the switching of the external terminal 19, and the pressure level corresponding to the suction height is automatically set, thereby improving the capability of the pump head. The pump can be operated with good efficiency without any energy loss.

Enter values of the wicking height Hs Micro Computer _{(17), Hd 1> H OFF1> H} POFF1> H ON1> H PON1 or _{Hd 2> H OFF2> H POFF2} > H ON2> automatically set in the relationship of H _PON2 Thus, even when the suction height changes, the values of HOFF1 and HON1 can be kept constant in the systems shown in FIGS. 5 and 8 as well as the effects of the system shown in FIGS. 4, 5 and 6. .

According to the present invention, even if a pump head having a pump head having a constant bed height is installed in a location where the suction heights are different, the pump head height can be changed automatically, thereby fully exhibiting the pump head's capacity and reducing the energy of the pump head. It is possible to provide a general-purpose pump device with no waste.

Claims (4)

A pressure sensor (10) for detecting at least one pump head (2, 3) and a pressure (Hdv) in the discharge pipe (8) connecting the pump heads (2, 3) and at least one water supply (9); In the pump device comprising a control device 17 for controlling the operation of the pump head in accordance with the detected pressure, The control device stores the maximum pressure phase pressure Hd detected by the pressure sensor 10 in the state where the water supply 9 is completely closed, and the detected pressure Hdv is the operation stop pressure Hd. _{When the} operation start pressure Hd1 is reached by a smaller value y than a predetermined value ₂ , an operation start command is output, the pump heads 2 and 3 are started, and the detected pressure Hdv is stored. When the operation stop pressure Hd2, which is smaller than the maximum normal pressure Hd by a predetermined value x, is reached, an operation stop command is output, and the pump heads 2 and 3 are stopped. The control device calculates the operation start pressure Hd ₁ and the operation stop pressure Hd ₂ according to the maximum normal pressure Hd, the predetermined small value x and the predetermined small value y. Pump apparatus, characterized in that. 2. The control device according to claim 1, wherein the control device has an operation start pressure Hd ₁ and an operation stop pressure Hd of the pump heads 2, 3 according to the formula Hd ₂ = Hd-x, Hd ₁ = Hd ₂ -y. ₂ ) a pump device characterized in that it calculates. The pump device according to claim 1, comprising a plurality of pump heads (2, 3), The control device starts operating pressures H _ON1 and H _PON1 of the pump head so that the pump head is operated or stopped alternately or in parallel in accordance with the maximum normal pressure Hd detected by the pressure sensor while the water supply is completely closed. ) and the operation stop pressure (H _OFF1, H _POFF1) the formula _{H OFF1 = Hd - x, H} POFF1 = H OFF1 - x1, H ON1 = H OFF1 - y and _{H PON1 = H ON1 - y 1} ( here, x, x ₁ , y and y ₁ are calculated according to a predetermined small value, respectively. The pump device according to claim 1, comprising a plurality of pump heads (2, 3), The control device stores the maximum pressure increase pressure Hd detected by the pressure sensor, and the pressure Hdv is the first pressure H smaller by a predetermined value x than the stored primary pressure pressure Hd. it reaches the _OFF1) outputs the operation stop command to the pump head, and a pressure (Hdv) is reached in the pressure (pressure (H _POFF1) of the small second than a predetermined small value _(x1) H _OFF1) of the first Outputs a parallel operation deactivation command of the pump head and when the pressure Hdv _reaches a third pressure H _{ON1 which} is smaller by a predetermined value y than the second pressure H _POFF1 . An operation start command is outputted in parallel to the pump head when the pressure _Hdv reaches the fourth pressure H _PON1 which is smaller than the third pressure H _ON1 by a predetermined value y ₁ . And a pump device for outputting a start command.