JPH0656730U - Flow rate measuring device in liquid circulation supply path - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a flow rate measuring device that can be configured compactly and can measure flow rate quickly without error. [Structure] Outlet sides 14a and 14b are provided on the outflow side and the inflow side of a liquid supply pump 11 in a liquid circulation supply path, and branch pipes 15a and 15 are provided from the respective outlets 14a and 14b.
It is made to communicate with the flow rate measuring meter 16 having the pressure detecting means and the calculating means incorporated therein via the b. The supply flow rate was calculated and displayed. In this case, the power supply of the flow meter 16 and the pump 11
Share each power source, and set the flow meter 16 and pump 11 to 1
It is desirable to install it in the place.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a flow rate measuring device in a liquid circulation supply path when a liquid such as fuel, lubricating oil, cooling water, etc. is supplied to an internal combustion engine by a pump in a cogeneration system, etc., which is based on constant operation. Regarding the improvement of.

[0002]

[Prior art]

 A conventional flow measuring device of this type is constructed as shown in FIG. In FIG. 2, 1 is a pump for supplying liquid, 2 is a return pipe for returning liquid such as fuel, lubricating oil, and cooling water from an internal combustion engine (not shown) such as an engine to the pump 1 for supplying liquid, 3 Is a supply pipe for supplying the liquid from the pump 1 to the internal combustion engine. Reference numerals 4a and 4b are pressure gauges for measuring the pressure of the liquid on the inflow side and the outflow side of the pump 1, respectively. In the conventional configuration, in the above configuration, the operator reads the measured values displayed on the pressure gauges 4a and 4b, calculates the pressure difference between the outflow side and the inflow side of the pump 1, and calculates this pressure difference and the liquid supply The flow rate of the liquid was calculated in consideration of the pump characteristics of the pump 1 of.

[0003]

[Problems to be solved by the device]

 In the conventional system, the pressure of the circulating liquid is measured at two points, the outflow side and the inflow side of the liquid supply pump as described above, and the measured value is used to measure the pressure between the outflow side and the inflow side of the liquid supply pump. The pressure difference was calculated and the liquid flow rate was calculated by considering the pressure difference and the pump characteristics of the liquid supply pump. However, in such a method, the reading error was caused by the operator and the accurate pressure difference could not be measured. Moreover, the calculation of the flow rate of the liquid after the pressure difference measurement must be performed by the operator each time, which is complicated, and there is a problem in that the flow rate value further causes an error if the reading error and the calculation error overlap. It is an object of the present invention to provide a flow rate measuring device in a liquid circulation supply path, which solves the above-mentioned problems (problems) of conventional ones.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides outlets on the outflow side and the inflow side of a liquid supply pump in a liquid circulation supply path, and a pressure detecting means and a computing means are provided from each outlet via a branch pipe. Is connected to a built-in flow rate meter, and the flow rate meter is configured to calculate and display the supply flow rate of the pump based on the difference in pressure of the liquid supplied from each of the outlets. It is desirable to share the power source of the flow meter and the power source of the pump so that the flow meter and the pump are integrated in one place.

[0005]

[Action]

 In the flow rate measuring device of the present invention, outlets are provided on the outflow side and the inflow side of the pump respectively, branch pipes are provided at each of the above outlets, and the pressure difference between the outlets is detected through the branch pipes. Since the calculation is performed using a flow meter with built-in output means and calculation means, it is not necessary for the worker to read each pressure gauge on the outflow side and the inflow side of the pump, and there is a reading error in measuring the pressure difference. Disappear. Furthermore, the flow rate of the liquid is automatically calculated by the calculation means in the flow rate meter, eliminating the need for the operator to make calculations. If the power source of the flow meter and the power source of the pump are shared and the flow meter and the pump are incorporated in one place, the entire device can be constructed in a small space.

[0006]

【Example】

 A flow rate measuring device in a liquid circulation supply path of the present invention will be described with reference to an embodiment shown in FIG. In FIG. 1, 11 is a pump for supplying liquid, 12 is a return pipe for returning liquid such as fuel, lubricating oil, and cooling water from an internal combustion engine (not shown) such as an engine to the pump 11, and 13 is the above liquid. A supply pipe for supplying the internal combustion engine from the pump 11. Reference numerals 15a and 15b are branch pipes connected to the outlets 14a and 14b, respectively, and the other ends of the branch pipes 15a and 15b are connected to a flow rate meter described below. Reference numeral 16 is a flow rate meter incorporating a pressure detecting means and a calculating means such as a ROM. Although not shown, the power source of the flow meter 16 is shared with the power source of the pump 11. In the above configuration, the pressures on the inflow side and the outflow side of the pump 11 are pressure detectors (not shown) built in the flow rate measuring device 16 from the respective outlets 14a, 14b through the respective branch pipes 15a, 15b. Is automatically detected by and the pressure difference between the outflow side and the inflow side of the pump 11 is calculated. Furthermore, the flow rate of the liquid is automatically calculated in consideration of the pressure difference and the pump characteristics of the pump 11 by the calculation formula given in advance in the ROM incorporated in the flow rate meter 16, It is displayed on the counter 16a.

[0007]

[Effect of device]

 The flow rate measuring device in the liquid circulation supply path of the present invention is provided with an outlet on each of the outflow side and the inflow side of the pump, and a flow rate measuring meter having a pressure detecting means and a calculating means built in from each of the above outlets through a branch pipe. It has the following excellent effects. Workers no longer need to read the pressure gauges on the outflow side and the inflow side of the pump, eliminating the reading error in measuring the pressure difference. Furthermore, since the liquid flow rate calculation is automatically performed by the calculation means in the flow rate meter, there is no labor for the operator to calculate, and there is no calculation error, and the desired pump supply flow rate value can be calculated quickly and accurately. Can be displayed. Also, if the power source for the flow rate meter and the power source for the pump are shared and they are installed in one place, the entire device can be constructed in a small space.

[Brief description of drawings]

FIG. 1 is a front view showing the configuration of an embodiment of the present invention.

FIG. 2 is a front view showing a configuration of a conventional example.

[Explanation of symbols]

 11: Pump 14a, 14b: Outlet port 15a, 15b: Branch pipe 16: Flow meter

Claims (2)

[Scope of utility model registration request] 1. A flow measuring meter having outlets on the outflow side and inflow side of a liquid supply pump in a liquid circulation supply path, and pressure detection means and calculation means built in from each of the outlets via branch pipes. The flow rate in the liquid circulation supply path is characterized in that the flow rate measurement meter calculates and displays the supply flow rate of the pump based on the pressure difference of the liquid supplied from each of the outlets. measuring device. 2. The flow rate measuring device in the liquid circulation supply path according to claim 1, wherein the power source of the flow rate measuring device and the power source of the pump are shared, and the flow rate measuring device and the pump are incorporated in one place.