JP4859696B2 - Pump assembly inspection apparatus and inspection method thereof - Google Patents

Description

  The present invention relates to a pump assembly inspection apparatus and an inspection method thereof.

  Conventionally, as an inspection of the completion of the assembly of the pump, in the process of driving the pump and sucking water from the suction pipe of the pump communicated with the test water tank and returning it to the test water tank via the pump discharge pipe, Various adjustments are made to the pump head during operation by adjusting the opening of the regulating valve installed in the pipe line, that is, hydraulic resistance, and the full-pumped pumping condition is changed from the shut-off state of the regulating valve (pump discharge amount = 0). The pump characteristics up to (pump discharge amount = maximum) (relationship of lift-flow rate-driving force) can be applied to the flow meter installed in the discharge pipe, the pressure gauge attached to the suction side and the discharge side, and the motor. It has been determined whether or not the pump is normally assembled as prescribed by the pump characteristics obtained by processing each measurement value measured using an inspection device equipped with a measuring instrument such as an attached wattmeter.

However, in the pumped water inspection method using the inspection device, a test water tank for storing test water and a suction and discharge test pipe for circulating and returning the pumped water are required, and the inspection device itself is large, and the opening of the adjusting valve is increased. The pump characteristics must be measured while adjusting as appropriate, so that the measurement takes time, and if the measured values measured by various measuring instruments are not processed as the relationship between the lift-flow rate-driving force, the pump is normal as specified. It is not possible to determine whether the pump is assembled, and after confirming pumping, the test water remaining in the pump must be removed, and the moisture adhering to the inside and outside of the pump must be completely dried to prevent rusting. In addition, a lot of time and labor are required for the inspection, and work such as adjusting the opening of the adjusting valve, processing the measurement data, and determining the quality of the measurement results for measurement It requires skill and requires a large installation space because the inspection device is large, and the energy cost required for measuring the performance of the pump is high because the pump is driven by an actual load pumping with a motor or the like. Have.
JP-A-5-126056 (FIG. 6)

  The problem to be solved is to reduce the weight and size of the inspection device in the assembly inspection of the pump for pumping liquid, without pumping water, not requiring much time and labor for inspection work, and not requiring skill. It is an object to provide a pump assembly inspection apparatus and method that can be easily handled in a small space, have low energy cost for inspection, and can determine the assembly state of the pump extremely easily. .

  In the pump assembly inspection apparatus of the present invention, in order to receive the air generated by the centrifugal action of the impeller built in the pump in the no-load operation state by starting the idling by opening the suction port of the pump after assembly, A transparent outer cylinder whose inside can be visualized is erected at the upper end of the air supply port connected to the discharge port of the pump, and a bearing base attached to the lower part of the outer cylinder and an outer cylinder head attached to the upper part An indicator stationary release hole for adjusting the indicator to freely move up and down by receiving the air flow on the guide shaft to be supported, and floating and stationary the indicator in a normal assembled state at a predetermined position of the outer cylinder, and the above The air volume adjustment release hole and the upper release hole of the blast are drilled, and much of the blast sent into the outer cylinder is exhausted to the atmosphere from the exhaust hole drilled in the upper outer cylinder head. The most major that you have configured And butterflies.

  In the assembly inspection method for a pump of the present invention, the assembly inspection apparatus is used to release the air from the discharge port of the pump in the no-load operation state by opening the suction port of the pump after assembly to the atmosphere and starting idling. Connect to be sent into the assembly inspection apparatus, and pump the water by visually checking whether the indicator in the assembly inspection apparatus floats and stops at a predetermined indicator stationary release hole position by the air blowing. The most important feature is that it can be easily determined whether or not the pump is normally assembled.

  According to the pump assembly inspection apparatus and method of the present invention, the assembly inspection apparatus adjusted and maintained so that the indicator in the assembly inspection apparatus floats and stops at a predetermined position with the air flow rate of the pump normally assembled in advance. Attached to the discharge port of the pump, the suction port of the pump is opened to the atmosphere, and no load operation is performed by idling start, so no measurement operation is required without pumping, and it is generated by the centrifugal action of the impeller built in the pump Because it is possible to determine the assembled state of the pump instantaneously appropriately and easily without requiring skill only by visually checking whether or not the indicator floats and stops at a predetermined position depending on the amount of air to be blown. Without any time and effort, and draining and drying of the pump after the inspection is unnecessary. Umate low, the inspection apparatus can respond to a narrow space to be lightweight compact has the advantage of being very work and economic excellent in efficient pump assembly and inspection can be performed. In addition, when the inspection target is an electric pump, the inspection power is small because of no-load operation. For example, a 50 Hz specification pump can be assembled and inspected with a commercial power supply of 60 Hz. It is particularly suitable for mass-produced pump assembly inspection.

  In the assembly inspection apparatus and inspection method for a pump for pumping liquid, the suction port of the pump after assembly is opened to the atmosphere, and it is generated by the centrifugal action of the impeller built in the pump in the no-load operation state by idling start In order to receive the air that blows, a transparent outer cylinder that can be visualized inside is erected at the upper end of the air supply port that is connected to the discharge port of the pump, and a bearing base that is attached to the lower part of the outer cylinder and an upper part that are attached to the upper part. An indicator for loosely fitting an indicator that freely moves up and down in response to the air flow to a guide shaft supported by an outer cylinder head that is floated and stationary at a predetermined position of the outer cylinder in a normal assembled state The stationary release hole, the air flow adjustment release hole and the upper release hole for the air flow are formed, and a large amount of the air sent into the outer cylinder is exhausted in the upper outer cylinder head. More exhausted into the atmosphere By using the assembly inspection apparatus configured as described above, it is visually confirmed whether or not the indicator in the assembly inspection apparatus floats and stops at a predetermined indicator stationary release hole position by blowing air from the discharge port of the pump. It is possible to easily determine whether or not the pump is normally assembled without pumping water.

  With reference to FIG. 1 thru | or FIG. 3, the Example of the assembly inspection apparatus of the pump of this invention and its inspection method is described.

  FIG. 1 is a view exemplifying a state in which an inspection apparatus 2 is used to inspect the pump 1 assembled by mounting, for example, an electric motor as a prime mover M on a pump 1 for pumping liquid. In order to receive the air generated by the centrifugal action of the impeller (not shown) built in the pump 1 in the no-load operation state due to the idling start by opening the suction port of the pump 1 later, An air supply port 7 of the assembly inspection apparatus 2 is connected to the discharge port 1d, and a transparent outer cylinder 4 whose inside can be visualized is erected at the upper end of the air supply port 7, and the lower part in the outer cylinder 4 is provided at the lower part. An indicator 5 that freely moves up and down by receiving the air is loosely fitted to a guide shaft 8 that is supported by an attached bearing base 6 and an outer cylinder head 3 that is attached to the upper part. Properly assembled and specified pump characteristics (relationship between lift-flow rate-drive force) Each of the approved 60 and 50 Hz pumps is used as a calibration master, each release hole to be described later is drilled, and a weight 9 for fine adjustment of buoyancy is attached to the upper end surface of the indicator 5 so that the assembly inspection apparatus 2 is prepare.

  Then, in order to use both the 60 and 50 Hz pump inspections with one assembly inspection device 2, an indicator stationary release hole H 6 for adjustment of 60 Hz specifications for adjusting and floating the indicator 5 at a predetermined determination position of the outer cylinder 4; An indicator stationary release hole H5 for 50 Hz specification determination is drilled, and an air volume adjusting release hole Ha is drilled below the indicator stationary release hole H6 for adjusting the buoyancy of the indicator 5, and further 60 and 50 Hz pumps If there is a large difference in the air flow rate, an air flow rate adjustment release hole Hb for adjusting the air flow rate difference between the 60 and 50 Hz specification pump is provided between the indicator static release hole H6 and the indicator static release hole H5. And an upper release hole Hu is formed above the indicator stationary release hole H5 to achieve a 50 Hz finish. When the pump is inspected, the indicator 5 is once blown upward from the position of the indicator stationary release hole H5, but it can be quickly suspended at the position of the indicator stationary release hole H5 by exhausting air from the upper release hole Hu. . The indicator 5 is once blown upward from the position of the indicator stationary release hole H6 during inspection of the 60 Hz specification pump, but the indicator stationary release hole H5 formed above the indicator stationary release hole H6 and The exhaust air from the upper release hole Hu can quickly float and stop at the position of the indicator stationary release hole H6. A large amount of air remaining in the assembly inspection apparatus 2 is finally exhausted into the atmosphere through the exhaust hole He formed in the outer cylinder head 3 at the upper end.

  The upper end of the guide shaft 8 penetrates the outer cylinder head 3 and is fastened to the outer cylinder head 3 by the fastener 11 to fix the guide shaft 8 and the outer cylinder head 3 and the outer cylinder 4 are joined. An inverted conical standby seat 10 is provided on the upper surface of the bearing base 6 at the lower end of the pedestal so as to make the indicator 5 stand by so as to be easily floated with respect to the next blown air. And although it is not necessary to specify the form of the indicator 5, it is desirable to make it the disk-like form which is easy to receive buoyancy, and as a buoyancy adjustment other than the above-mentioned, you may adjust the outer periphery diameter (phi) D of this indicator 5.

It is a side view which shows the state which mounts the assembly inspection apparatus of this invention pump to a pump, and carries out assembly inspection. It is a side view of the assembly inspection apparatus of the pump of the present invention. . It is a top view of the assembly inspection apparatus of this invention pump.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pump 1d Discharge port 2 Assembly inspection apparatus 3 Outer cylinder head 4 Outer cylinder 5 Indicator 6 Bearing stand 7 Air supply port 9 Guide shaft H5 Indicator stationary release hole H6 Indicator stationary release hole Ha Air volume adjustment release hole Hb Air volume adjustment Release hole Hu Upper release hole

Claims (2)

  In an assembly inspection apparatus for a pump for pumping liquid, the suction port of the pump after assembly is opened to the atmosphere, and the air generated by the centrifugal action of the impeller built in the pump is received in the no-load operation state due to idling activation. Therefore, a transparent outer cylinder whose inside can be visualized is erected at the upper end of the air supply port connected to the discharge port of the pump, and a bearing stand attached to the lower part of the outer cylinder and an outer cylinder attached to the upper part Many indicator stationary releases for adjustment, in which a guide shaft supported by a head is loosely fitted with an indicator that freely moves up and down by receiving the air flow, and the indicator is floated and stationary at a predetermined position of the outer cylinder in a normal assembled state. The air flow adjustment release hole and the upper release hole of the air blow and the upper release hole are formed, and the air sent into the outer cylinder is exhausted into the atmosphere from the exhaust hole formed in the upper outer cylinder head. Specially configured to Assembly and inspection device of the pump to be.   An assembly inspection method for a pump for pumping liquid using the assembly inspection apparatus according to claim 1, wherein the pump suction port after assembly is opened to the atmosphere and the pump discharge port is in a no-load operation state due to idling. Is connected to be sent into the assembly inspection apparatus, and it is visually confirmed whether or not the indicator in the assembly inspection apparatus is floated and stopped at a predetermined indicator stationary release hole position by the ventilation. A pump assembly inspection method characterized in that it is possible to easily determine whether or not the pump is normally assembled without pumping water.

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