JP2786117B2 - Gear pump discharge meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear pump used for extruding a predetermined amount of a molten polymer in a spinning process or the like. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge amount measuring device, and more particularly to a gear pump discharge amount measuring device capable of easily and accurately measuring a discharge amount of a gear pump.

[0002]

2. Description of the Related Art Conventionally, in order to inspect the measurement accuracy of a gear pump, the discharge amount of the gear pump has been measured. In the prior art, generally, as shown in FIG. The gear pump 1 is mounted on the vertical mounting seat 2 with mounting bolts 4.

[0003] A measuring liquid tank 3 in which the measuring liquid 3 is stored.
The measuring liquid 3 is returned from the pump 1 to the measuring liquid tank 31 through the supply pipe 33 by the pump 32 so as to be circulated, and the measuring liquid 3 such as silicon oil is supplied to the gear pump 1 attached to the mounting seat 2 as described above. In doing so, the suction valve 34 provided in the supply pipe 33 is manually opened and closed to supply the metered liquid 3 to the gear pump 1 or stop the supply.

In driving the gear pump 1 mounted on the mounting seat 2 as described above, a rotation transmitting mechanism 5b such as a bevel gear or a gear for transmitting the rotation of the driving motor 5a, and a drive for driving the gear pump 2 are provided. Shaft 5c
And a clutch 5d provided between the gear pump 1 and the drive shaft 5c to transmit the rotation of the drive motor 5a to the drive shaft 5c.
The drive shaft 5c is inserted into the stopper 5
e, the gear pump 1 is rotated and driven by the drive shaft 5c to which the rotation of the drive motor 5a is transmitted as described above.

Here, when inspecting the discharge amount of the gear pump 1 mounted on the mounting seat 2 as described above,
As described above, the drive motor 5a is driven via the drive shaft 5c.
The gear pump 1 is driven, the suction valve 34 is manually opened, the metered liquid 3 is supplied from the metered liquid tank 31 to the gear pump 1 through the supply pipe 33 by the pump 32, and the metered liquid supplied in this manner is supplied. 3 was discharged by the gear pump 1.

In measuring the amount of the measuring liquid 3 discharged from the gear pump 1 as described above, the measuring liquid 3 discharged from the gear pump 1 is sent out through a feed pipe 42 and the measuring liquid 3 thus sent out is sent. Is checked by an adjusting valve 42a provided in the feed pipe 42, and when the pressure of the measuring liquid 3 sent out by the gear pump 1 reaches a predetermined pressure, the shielding placed on the volumetric flask 43 is stopped. Move the plate 44 to the volumetric flask 4
3, the metering liquid 3 sent out by the gear pump 1 is supplied to the measuring flask 43, and the measuring liquid 3 is supplied to the measuring flask 43 until the gear pump 1 rotates an appropriate number, for example, 100 rotations. Is moved to close the opening 43a of the volumetric flask 43, and the discharge amount of the gear pump 1 is measured from the amount of the measuring liquid 3 supplied to the volumetric flask 43, and the metering accuracy of the gear pump 1 is inspected. Was like that. Then, the above operation is repeated, and the metering accuracy of each gear pump 1 is sequentially inspected.

However, it is very difficult to mount the gear pump 1 on the mounting seat 2 whose mounting surface 2a is vertical by the mounting bolts 4 as described above, or to remove the gear pump 1 from which measurement has been completed. It takes a lot of time to measure the discharge amount of the gear pump 1 and the workability is poor, and the mounting surface 2 of the mounting seat 2 is difficult.
There is a problem that the metered liquid 3 leaks out because the gear pump 1 is not properly attached to a, and the discharge amount of the gear pump 1 cannot be accurately measured.

When the measuring liquid 3 such as silicon oil discharged by the gear pump 1 is supplied to the volumetric flask 43 as described above to measure the discharge amount of the gear pump 1, the measured volume of the volumetric flask 43 is measured. Since the measuring liquid 3 such as silicon oil adheres and remains to some extent, if the measuring flask 43 is used again for measuring the discharge amount of the gear pump 1 as it is, the measuring liquid 3 that has adhered to the measuring flask 43 and the gear pump 1 An error occurred in the measurement of the discharge amount of No. 1 and accurate measurement could not be performed. For this reason, it is necessary to clean the measuring flask 43 after each measurement, so that the measurement of the measuring liquid discharged from the gear pump 1 becomes more troublesome, and it is further necessary to measure the discharge amount of the gear pump 1. There was a problem that it took much time.

Further, it takes a considerable time to stabilize the level of the measuring liquid 3 in the measuring flask 43 after the measurement, and the workability is poor.
There is also a problem that there is a difference between individuals because the liquid level is read by a human, so that accurate measurement cannot be performed.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem in measuring the discharge amount of a gear pump.

That is, in the present invention, when measuring the discharge amount of the gear pump, the gear pump can be easily and reliably mounted on the mounting seat, and the time required for mounting the gear pump can be reduced. The objective is to make it possible to easily and accurately measure the discharge amount of the gear pump in a short time, and to automatically and easily measure the measurement liquid discharged from the gear pump. Is what you do.

[0012]

In order to solve the above-mentioned problems, in the first apparatus for measuring the discharge amount of a gear pump according to the present invention, the mounting seat 2 on which the mounting surface 2a for mounting the gear pump 1 is horizontal is provided. Fixing means 1 for pressing and fixing the gear pump 1 against the mounting surface 2a of the mounting seat 2.
0, a driving means 20 for driving the gear pump 1, a measuring liquid supply means 30 for supplying the measuring liquid 3 to the gear pump 1,
A measuring unit 40 for measuring the amount of the measuring liquid 3 discharged from the gear pump 1 is provided.

In the second apparatus for measuring the discharge amount of the gear pump according to the present invention, the measuring means 40 for measuring the amount of the measuring liquid 3 discharged from the gear pump 1 is used from the start of the measurement to the end of the measurement. Measuring devices 41 and 49 for automatically measuring a weight change due to the measuring liquid 3 discharged from the gear pump 1 are provided.

Further, in the third apparatus for measuring the discharge amount of the gear pump according to the present invention, the measuring devices 41, 49 for automatically measuring the weight change due to the measuring liquid 3 discharged from the gear pump 1 from the start of the measurement to the end of the measurement. In addition, an automatic measurement function is provided to automatically hold the weight at zero until the start of weighing and to instantly hold the weight at the end of weighing.

[0015]

In the apparatus for measuring the discharge of a gear pump according to the present invention, when the gear pump 1 is mounted on the mounting surface 2a of the mounting seat 2, the gear pump 1 is mounted on the mounting surface 2a of the mounting seat 2 which is horizontal. And fixing means 10
The gear pump 1 is pressed against the mounting surface 2a of the mounting seat 2 to be fixed. When the gear pump 1 is mounted on the mounting surface 2a of the mounting seat 2 in this manner, the gear pump 1 is mounted on the vertical mounting surface 2a of the mounting seat 2 with mounting bolts 4 as compared with the conventional mounting. 2, the gear pump 1 can be easily and accurately mounted, and the time required for mounting the gear pump 1 can be reduced.
Can be eliminated, and the discharge amount of the measuring liquid 3 by the gear pump 1 can be easily and accurately measured in a short time.

When the amount of the measuring liquid 3 discharged from the gear pump 1 is measured by the measuring means 40, a change in weight due to the measuring liquid 3 discharged from the gear pump 1 from the start of the measurement to the end of the measurement is measured. When the automatic measurement is performed, only the weight of the measurement liquid 3 discharged by the gear pump 1 is measured even if the measurement liquid 3 remains in the container or the like used for the previous measurement.

For this reason, the measuring liquid 1 such as silicone oil discharged from the gear pump 1 is supplied to the measuring flask 43 and the measuring liquid 3 is supplied to the measuring flask 43 as in the case of measuring the discharging amount of the gear pump 1. There is no occurrence of an error in the measurement of the discharge amount of the gear pump 1 due to the adhesion and remaining, and there is no need to perform a troublesome work of cleaning the measuring flask 43 every time the measurement is performed, and the measurement by the gear pump The discharge amount of the liquid 3 can be more easily and accurately measured.

Further, when the weight change due to the measuring liquid 3 discharged from the gear pump 1 is automatically measured by the measuring devices 41 and 49 from the start of the measurement to the end of the measurement, the weight is automatically reduced to 0 until the start of the measurement. If the weight is held instantaneously when the measurement is completed and the measurement is completed, only the weight of the measurement liquid 3 discharged by the gear pump 1 is automatically measured without using the shielding plate 44 or the like.

To supply the measuring liquid 3 such as silicon oil discharged from the gear pump 1 to the measuring tank 45, the amount of discharge of the gear pump 1 is controlled by using the shielding plate 44. As in the case of measurement, there is no occurrence of an error in the measurement of the discharge amount of the gear pump 1 due to a delay in the operation time of the shield plate 44 or the adhesion of the measuring liquid 3 such as silicon oil to the shield plate 44. 1 makes it possible to more easily and accurately measure the discharge amount of the measuring liquid 3.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a gear pump discharge amount measuring apparatus according to an embodiment of the present invention.

(Embodiment 1) In the discharge amount measuring device for a gear pump in this embodiment, as shown in FIG. 2, the mounting surface 2a for mounting the gear pump 1 on the bottom 6a of the mounting frame 6 is horizontal. A mounting seat 2 is provided, and the gear pump 1 is mounted at an appropriate position on the horizontal mounting surface 2a.

The fixing means 10 for pressing and fixing the gear pump 1 against the mounting surface 2a of the mounting seat 2 includes:
A holding member 12 that is raised and lowered by a hydraulic cylinder 11 is provided above the mounting seat 2. The pressing member 12 is moved up and down by the hydraulic cylinder 11 to press the gear pump 1 against the mounting seat 2 and fix the gear pump 1 to the mounting seat 2. 2 can be removed.

As a driving means 20 for driving the gear pump 1, a driving motor 21 is attached to the pressing member 12, and the driving motor 21 is moved up and down by the hydraulic cylinder 11 together with the pressing member 12. When the holding member 12 is lowered by 11 and the gear pump 1 is fixed to the mounting seat 2, the rotation shaft 21 a of the drive motor 21 is inserted into the drive unit 1 a of the gear pump 1.

In order to measure the number of rotations of the gear pump 1 by the drive motor 21, an encoder 22 for measuring the number of rotations is attached to the drive motor 21.

On the other hand, the measuring liquid supply means 30 for supplying the measuring liquid 3 to the gear pump 1 mounted on the mounting seat 2 measures the measuring liquid 3 such as silicon oil as in the conventional apparatus shown in FIG. The measuring liquid 3 in the measuring liquid tank 31 is sent out of the measuring liquid tank 31 through the supply pipe 33 by the pump 32 to be circulated back to the measuring liquid tank 31. Is automatically opened and the measured liquid 3 is supplied to the gear pump 1
Or the suction valve 34 is closed to stop the supply of the measuring liquid 3 to the gear pump 1.

The measuring means 40 for measuring the amount of the measuring liquid 3 discharged from the gear pump 1 sends the measuring liquid 3 discharged from the gear pump 1 to a feed pipe 42 in the same manner as the conventional one shown in FIG. And the pressure of the metered liquid 3 sent out in this way is adjusted by an adjusting valve 42 a provided in the feed pipe 42. When the pressure of the measuring liquid 3 sent out by the gear pump 1 reaches a predetermined pressure, the shielding plate 44 disposed on the measuring flask 43 is moved to open the opening 43a of the measuring flask 43. , Gear pump 1
Is supplied to the measuring flask 43.

In this embodiment, when measuring the discharge amount of the gear pump 1, the mounting seat 2 is mounted horizontally while the pressing member 12 is moved upward by the hydraulic cylinder 11. After placing the gear pump 1 at a predetermined position on the surface 2a, the hydraulic cylinder 1
1 lowers the drive motor 21 attached to the holding member 12 together with the holding member 12 so that the holding member 12
Thus, the gear pump 1 is fixed to the mounting surface 2a of the mounting seat 2, and the rotating shaft 21a of the driving motor 21 is inserted into the driving section 1a of the gear pump 1.

Next, the suction valve 34 provided in the supply pipe 33 is automatically opened, and the delivery pump 3
2, the measuring liquid 3 sent out from the measuring liquid tank 31 is supplied to the gear pump 1 through the supply pipe 33, and the gear pump 1 is driven by rotating the drive motor 21.

The gear pump 1 driven as described above
Thus, the measuring liquid 3 supplied to the gear pump 1 is discharged through the supply pipe 33, and the measuring liquid 3 discharged from the gear pump 1 is discharged through the feed pipe 42.

The pressure of the metered liquid 3 sent out in this way is adjusted by the adjusting valve 42a provided in the feed pipe 42, and the pressure of the metered liquid 3 sent out by the gear pump 1 becomes a predetermined pressure. When the pressure has been reached, the shielding plate 44 arranged on the measuring flask 43 is moved to open the opening 43a of the measuring flask 43, and the measuring liquid 3 sent out by the gear pump 1 is supplied to the measuring flask 43. I did it.

Then, the metered liquid 3 is supplied to the volumetric flask 43 until the gear pump 1 rotates a predetermined number, for example, 100 times, and then the above-mentioned shielding plate 44 is moved to open the port 43a of the volumetric flask 43. To prevent the measuring liquid 3 from being supplied to the volumetric flask 43, stop the rotation of the drive motor 21 to stop driving the gear pump 1, further close the suction valve 34, and The supply of the measuring liquid 3 was stopped.

Also, as described above, the volumetric flask 43
In measuring the liquid 3 supplied to the gear pump 1, the weight was measured by an electronic balance or the like, and the discharge amount of the gear pump 1 was calculated based on the weight to check the measuring accuracy of the gear pump 1.

After checking the discharge amount of the gear pump 1 in this manner, the holding member 12 is lifted by the hydraulic cylinder 11 to release the gear pump 1 from being fixed, and in this state, the gear pump 1 is attached to the mounting seat 2. Mounting surface 2a
To remove it from.

When the discharge amount of the gear pump 1 is measured as described above, as in the conventional case, the gear pump 1
There is no need to attach or detach the gear pump 1 to or from the attachment surface 2a of the vertical attachment seat 2 with the attachment bolts 4, and the gear pump 1 can be easily attached and detached, and the discharge amount of the gear pump 1 can be easily and quickly measured. As a result, there is no mistake in mounting the gear pump 1 on the mounting surface 2a of the mounting seat 2, and the discharge amount of the gear pump 1 can be accurately inspected without leakage of the measuring liquid 3.

(Embodiment 2) In the apparatus for measuring the discharge amount of a gear pump in this embodiment, only the measuring means 40 for measuring the amount of the measuring liquid 3 discharged from the gear pump 1 is changed from that of the above-mentioned embodiment 1. ing.

In this embodiment, as shown in FIG. 3, the measuring liquid 40 discharged from the gear pump 1 is supplied by a measuring pipe 40 to the measuring pipe 40 to feed the measuring liquid 3 discharged from the gear pump 1 to a feed pipe 42 as shown in FIG. And the pressure of the metered liquid 3 thus sent out is adjusted by an adjusting valve 42a provided in the feed pipe 42, and the pressure of the metered liquid 3 sent out by the gear pump 1 reaches a predetermined pressure. In this case, the shielding plate 44 disposed on the measuring tank 45 is moved to supply the measuring liquid 3 sent through the feed pipe 42 to the measuring tank 45, and the weight change in the measuring tank 45 is determined by the load cell 41. Weighing device 41 comprising a load cell amplifier 49 and
The automatic weighing is performed by 49.

Here, in automatically weighing the weight change in the weighing tank 45 by the weighing devices 41 and 49, a reset switch (not shown) is provided in the weighing devices 41 and 49, and before the weighing is started. Then, the weighing is performed after the reset switch is turned on to reduce the weight to zero.

Further, at the bottom of the measuring tank 45,
A cover 47 is provided to close the discharge port 45a at the bottom of the measuring tank 45 by being urged by the spring 46, and the discharge port 45a is closed by the cover 47 during measurement. On the other hand, after the measurement is completed, the arm 48 provided below the discharge port 45a of the measurement tank 45 is rotated upward by an air cylinder or the like, and the arm 4
8, the cover member 4 in a state where the discharge port 45a is closed.
7 is pushed upward against the urging force of the spring 46 to open the discharge port 45a so that the measuring liquid 3 stored in the measuring tank 45 is discharged from the discharging port 45a.

In this embodiment, when measuring the discharge amount of the gear pump 1, the gear pump 1 is fixed to the mounting surface 2a of the mounting seat 2 and driven in the same manner as in the first embodiment. At the same time, the metering liquid 3 sent out from the inside of the measuring liquid tank 31 is supplied to the gear pump 1 through the supply pipe 33, and the metering liquid 3 thus supplied is sent out by the gear pump 1 through the feeding pipe 42.

As described above, the feed pipe 4
The pressure of the metered liquid 3 sent out through the gear pump 1 is adjusted by the above-described adjusting valve 42a provided in the feed pipe 42. When the pressure of the shielding plate 4 is reached, the shielding plate 4
4 to open the opening 45b of the measuring tank 45,
The measuring liquid 3 sent out by the gear pump 1 is supplied to the measuring tank 45, and the measuring by the measuring devices 41 and 49 is started.

The weight at the time when the gear pump 1 has rotated a predetermined number, for example, at the time when the gear pump 1 has rotated 100 times, is measured by the weighing devices 41 and 49, and the weighing result is calculated by the CPU inside the weighing devices 41 and 49. Thus, the discharge amount of the gear pump 1 is calculated and displayed on the display device 50 to determine whether the discharge amount of the gear pump 1 is appropriate.

Further, the gear pump 1 is rotated by a predetermined number as described above, and the weight at that time is measured by the weighing device 41,
After the measurement by the pump 49, the rotation of the drive motor 21 is stopped and the gear pump 1 is stopped, as in the first embodiment.
Is stopped, the suction valve 34 is closed, and the supply of the measuring liquid 3 to the gear pump 1 is stopped. Further, in this embodiment, the arm 48 is connected to the air cylinder as described above. The arm 48 causes the arm 48 to rotate upward.
The lid material 47 in a state where the discharge port 45a is closed is pushed upward against the urging force of the spring 46, and the discharge port 45a is opened to discharge the liquid 3 stored in the measuring tank 45 into the discharge port 45a. 45a.

Here, weighing by the weighing devices 41, 49 is started from the state of 0 as described above, and the weight at the time when the gear pump 1 rotates by a predetermined number is measured.
9, the measured liquid 3 is stored in the measuring tank 45.
Remains, only the weight of the measuring liquid 3 discharged from the gear pump 1 is measured by the measuring devices 41 and 49 from the start of the current measurement to the end of the measurement.

Therefore, in this embodiment,
Unlike the case where the measuring liquid 3 discharged from the gear pump 1 is supplied to the measuring flask 43 to measure the discharge amount in the gear pump 1, there is no need to replace the measuring flask 43 every time measurement is performed. The troublesome work of washing the tub is eliminated and the volumetric flask 4
3, the discharge amount of the gear pump 1 can be more easily and accurately measured without causing an error in the measurement of the discharge amount of the gear pump 1 due to the previous measurement liquid 3 adhering.

(Embodiment 3) In the apparatus for measuring the discharge amount of a gear pump according to the present embodiment, the metering amount discharged from the gear pump 1 from the start of measurement to the end of measurement is different from that of the gear pump of Example 2 described above. The weighing devices 41 and 49 for automatically weighing the change in weight due to the liquid 3 are provided with an automatic measurement function for automatically holding the weight at 0 until the start of weighing and for instantly holding the weight at the end of weighing. The shielding plate 44 on the tank 45 is removed.

In this embodiment, as shown in FIG. 4, the measuring liquid 40 discharged from the gear pump 1 is fed by a measuring pipe 40 to the measuring pipe 40 to feed the measuring liquid 3 discharged from the gear pump 1 to the feed pipe 42 as shown in FIG. The pressure of the metered liquid 3 thus sent out is adjusted by an adjusting valve 42a provided in the feed pipe 42, and the metered liquid 3 passed through the adjusting valve 42a is supplied to a metering tank 45. The weight change in the measuring tank 45 is automatically measured by the measuring devices 41 and 49 including the load cell 41 and the load cell amplifier 49.

When the weight change in the measuring tank 45 is automatically weighed by the weighing devices 41 and 49, the weighing devices 41 and 49 automatically keep the weight at zero until the start of weighing. An automatic measurement function that instantly holds the weight at the end of weighing is provided to perform weighing.

In this embodiment, when measuring the discharge amount of the gear pump 1, the gear pump 1 is fixed to the mounting surface 2a of the mounting seat 2 and driven in the same manner as in the second embodiment. At the same time, the metering liquid 3 sent out from the inside of the measuring liquid tank 31 is supplied to the gear pump 1 through the supply pipe 33, and the metering liquid 3 thus supplied is sent out by the gear pump 1 through the feeding pipe 42.

As described above, the feed pipe 4
The pressure of the measuring liquid 3 sent out through the feed pipe 2 is adjusted by the adjusting valve 42a provided in the feed pipe 42. In this embodiment, the measuring liquid 3 is supplied to the measuring tank 45. When the pressure of the measuring liquid 3 sent out by the gear pump 1 reaches a predetermined pressure, the reset signal of the measuring devices 41 and 49 is turned off, and the measuring devices 41 and 49 are changed from the state of 0 to zero.
Weighing was started.

The weight at the time when the gear pump 1 has rotated a predetermined number, for example, at the time when the gear pump 1 has rotated 100 times, is instantaneously held, and the weighing result is calculated by a CPU provided inside the weighing devices 41 and 49. The discharge amount of the gear pump 1 is calculated and displayed on the display device 50 to determine the appropriate discharge amount of the gear pump 1.

As described above, when the weight change due to the measuring liquid 3 discharged from the gear pump 1 is automatically measured by the measuring devices 41 and 49 from the start of the measurement to the end of the measurement, the measurement is automatically performed until the start of the measurement. When the weight is kept at zero and the weight is held instantaneously at the end of the measurement, the liquid discharged from the gear pump 1 from the start of the measurement to the end of the measurement without using the shielding plate 44 is used. Only the weight of 3 was automatically weighed by the weighing devices 41 and 49.

For this reason, in this embodiment,
The measuring liquid 3 such as silicone oil discharged from the gear pump 1 is supplied to the measuring tank 45 by control using the shielding plate 44, and the operation of the shielding plate 44 is measured as in the case where the discharge amount of the gear pump 1 is measured. Due to the delay or the adhesion of the measuring liquid 3 such as silicon oil to the shielding plate 44, the gear pump 1
The measurement of the discharge amount of the measuring liquid 3 by the gear pump 1 can be more easily and accurately measured without causing an error in the measurement of the discharge amount.

[0053]

As described in detail above, in the apparatus for measuring the discharge amount of a gear pump according to the present invention, the gear pump is mounted on the mounting surface of the horizontal mounting seat, and the gear pump is pressed by the fixing means. The mounting of the gear pump on the mounting seat can be performed much easier and more accurately than the conventional one, reducing the time required for mounting the gear pump and reducing the leakage of the measuring liquid. This makes it possible to easily and accurately measure the discharge amount of the gear pump in a short time.

When measuring the amount of the measuring liquid discharged from the gear pump by the measuring means, the weight change due to the measuring liquid discharged from the gear pump is automatically measured by the measuring device from the start of the measurement to the end of the measuring. Then, even if the measuring liquid remains in the container or the like used for the previous measurement, the above-mentioned measuring device measures only the weight of the measuring liquid discharged by the current gear pump, and is discharged from the gear pump. As in the case where the measured liquid is supplied to the measuring flask and measured, due to the previous measuring liquid remaining on the measuring flask, there is no error in measuring the discharge amount of the gear pump, There is no need to perform the troublesome work of cleaning the measuring flask every time measurement is performed, and the measurement of the discharge amount by the gear pump is shorter. Simple and now correctly performed between.

Further, when the weight change due to the measuring liquid 3 discharged from the gear pump from the start of the measurement to the end of the measurement is automatically measured by the measuring device, the weight is automatically kept at 0 until the start of the measurement. If the weight is held instantaneously at the end of the measurement, the weight of the measuring liquid discharged from the gear pump is automatically measured by the measuring device from the start of the measurement to the end of the measurement without using a shielding plate. The discharge amount of the gear pump can be reduced more easily in a short time, because there is no error in the measurement of the discharge amount of the gear pump due to the delay of the operation of the shield plate and the adhesion of the measuring liquid such as silicon oil to the shield plate. And it became possible to measure accurately.

[Brief description of the drawings]

FIG. 1 is a schematic view of a conventional device used for measuring a discharge amount in a gear pump.

FIG. 2 is a schematic diagram of a gear pump discharge amount measuring device used in Embodiment 1 of the present invention.

FIG. 3 is a schematic diagram of a gear pump discharge amount measuring device used in Embodiment 2 of the present invention.

FIG. 4 is a schematic diagram of a gear pump discharge amount measuring device used in Embodiment 3 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gear pump 2 Mounting seat 2a Mounting surface 3 Metering liquid 10 Fixing means 20 Driving means 30 Metering liquid supply means 40 Measuring means 41 Load cell 49 Load cell amplifier

Claims (3)

(57) [Claims] 1. A mounting seat 2 on which a mounting surface 2a for mounting a gear pump 1 is horizontal, and a gear pump 1 which is mounted on the mounting seat 2.
Fixing means 10 for pressing against the mounting surface 2a of the
A drive means 20 for driving the gear pump 1, a measuring liquid supply means 30 for supplying the measuring liquid 3 to the gear pump 1, and a measuring means 40 for measuring the amount of the measuring liquid 3 discharged from the gear pump 1 are provided. A discharge amount measuring device for a gear pump. 2. The gear pump discharge amount measuring device according to claim 1, wherein the measuring means 40 automatically measures a weight change due to the measuring liquid 3 discharged from the gear pump 1 from the start of the measurement to the end of the measurement. Measuring devices 41, 49
A discharge amount measuring device for a gear pump, comprising: 3. The discharge amount measuring device for a gear pump according to claim 2, wherein the weighing devices 41 and 49 automatically hold the weight at 0 until the start of weighing and instantaneously weigh the weight at the end of weighing. A discharge amount measuring device for a gear pump, comprising an automatic measuring function for holding the pressure.