JPS60183392A - Chemical injector with automatic washing mechanism - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a chemical injection device equipped with a cleaning device that automatically cleans pump piping when injecting chemicals into any device.

[Prior art]

As a conventional chemical injection device, there is a flow sheet of a chemical injection device shown in FIG.

In Figure 1, (1) is a tank for storing chemicals, (2 is
) is the inlet valve of the chemical injection pump (3), (4) is the waste liquid valve,
(5) is the outlet valve of the chemical injection pump, (6) is the check valve, (
7) is a control valve that adjusts the amount of chemicals. (8) is a wash water pump, and (9) is a wash water valve. Also, (111 is (1
) to (9), each consisting of system 1 and system 2. However, the washing water valve (9) is not the washing water pump (8).
) Some equipment does not have piping leading to it.

Next, the operation of the conventional chemical device shown in FIG. 1 will be explained. The chemicals stored in the chemical tank (1) are filled up to the inlet of the injection pump (3) due to the liquid level difference with the injection pump (3). The large mouth valve (2) is fully closed during maintenance of the injection pump (3), but is normally fully open.

The waste liquid valve (4) is used to remove chemicals from inside the piping during maintenance. The outlet valve (5) is also fully open except during maintenance. Since this conventional device usually operates only one injection pump (3), in this example, a check valve (6) is installed to prevent backflow to the two injection pumps (3). The control valve (7) is used to manually adjust the injection amount. Infusion pump (3) with the above equipment configuration
By operating the system, it becomes possible to inject a predetermined amount of chemicals from the tank (1) to the injection point. When cleaning equipment and piping, manually fully close the large mouth valve (2) and outlet valve (5), fully open the waste liquid valve (4), and then operate the cleaning water pump (8). It becomes possible to clean the inside of the piping.

Conventional chemical injection devices are configured as described above, so when cleaning the pipes, it is necessary to manually operate the display devices (such as valves), so it is not always possible to properly clean the pipes. However, this invention has disadvantages such as the precipitation of chemicals in equipment and piping, causing blockages. It was removed for removal, and the manual valve was changed to electrical operation.
The purpose of the present invention is to provide a chemical injection device that can keep equipment and piping clean by incorporating a control device.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 2 shows a drug injection device 70- according to an embodiment of the present invention.
It is a sheet. In Figure 2, (2+, (3),
The valves (4) and (51, t9) each have the same functions as those in the flow sheet explained in FIG. 1, but in this example, the operation was changed from a manual operation type to an electrical operation type.

In addition, the injection pump (3) can also be used not only for circulating chemical solutions but also for circulating cleaning water. Control device 0υ
is a control device that controls the large mouth valve (2), injection pump (3), liquid generation valve (4), outlet valve (5), and washing water valve (9) to suit the purpose of chemical injection and washing. It is.

Next, the operation in the embodiment of the present invention will be explained with reference to the time chart shown in FIG.

FIG. 6 is a time chart when switching from the 1-system operation shown in FIG. 2 to the 2-system operation, and then cleaning the 1-system piping. First, when operating system 1, the large mouth valve (2) and outlet valve (5) are fully open, the waste liquid valve (4) and the wash water valve (9) are fully closed, and the injection pump (3) is operated. It is possible to inject chemicals into any device via the control valve (7). At this time, each valve of the two systems and devices such as the injection pump are in a fully closed or stopped state. Next, when switching to the 2nd system, switch the system by fully closing and stopping each valve and injection pump of the 1st system equipment, and bringing the 2nd system equipment into the same operating state as the 1st system equipment described above. . To move on to the pipe cleaning process for system 1, after confirming that system 2 is operating normally, remove the waste liquid valve (4) and the wash water valve (
9) is fully opened and the injection pump (3) is operated. Cleaning shall be completed after a certain period of time, and the equipment shall be fully closed and stopped in preparation for the next operation. All of the above operations are performed by the control device 0υ.

In the above embodiment, the large outlet valve (2), the waste liquid valve (4), the outlet valve (5), and the wash water valve (9) are each operated electrically, but they may also be operated hydraulically or pneumatically. Furthermore, any method can be used regarding the timing of operation and cleaning.

〔Effect of the invention〕

As described above, according to the present invention, by changing a manually operated valve to an electrically operated valve and incorporating a control device to enable control, it is possible to improve maintainability and extend the life of the device N, and furthermore control the injection amount. It also has the effect of obtaining highly accurate products.

[Brief explanation of drawings]

Figure 1 is a flow sheet showing a conventional chemical injection device;
The figure is a flow sheet showing a chemical injection device according to an embodiment of the present invention, and FIG. 6 is a time chart showing the operation of an embodiment of the present invention. (1) Chemical storage tank (2) Injection pump artificial valve (3)
Chemical injection pump (4) Waste liquid valve (5) Injection pump outlet valve (6) Check valve (7) Adjustment valve (8) Washing water cylinder 7' (9) Washing water valve (11 Piping αη Control device) , In the figures, the same reference numerals indicate the same or corresponding parts. Agent: Patent Attorney Sanro Kimura

Claims (1)

[Claims] In chemical injection equipment consisting of pumps, valves, etc.
An automatic cleaning mechanism characterized in that the pump and valves are either electrically operated, pneumatically operated, or hydraulically operated, each operation signal is incorporated into a control device, and the control device enables automatic cleaning of pump piping. Chemical injection device.