JP5183502B2 - Submersible electric pump - Google Patents

Description

  The present invention relates to, for example, a portable submersible electric pump used at a temporary site or the like, and particularly to a structure for preventing damage to a pump installation leg when installing a temporary pump and a stable installation configuration.

  In a conventional submersible pump, in a submersible pump in which a pump casing is provided integrally with the motor casing on the lower side of the motor casing, and a suction port is opened at a lower portion of the pump casing, a flange projecting downward around the suction port of the pump casing A flat plate strainer is attached to the flange portion with a bolt, and the head of the bolt is detachably covered with an elastic member that constitutes a pump leg, and the elastic member is formed between the head of the bolt and the strainer. A submersible pump (see, for example, Patent Document 1) having a first portion in between and a second portion below a bolt head is known.

  However, in the configuration of Patent Document 1, vibration and the like during pump operation have a vibration isolation effect as compared to rigid body installation without an elastic member, but vibration or the like is only caused by the elastic force of the elastic member in the installation portion. Because it is difficult to absorb the external force and the external force release action is low, it is difficult to install the temporary temporary pump with poor installation conditions, and it is difficult to install the pump manually. Since the pump is often handled in a complicated manner, the pump falls during installation and a large impact load is applied to the pump leg, resulting in damage to the screw holes and threaded parts of the pump legs. In addition to having a problem, there is also a problem that a fastening tool is required for attaching and detaching the bolt because of the above-described screw-fastening configuration with the bolt, and it cannot be handled with a simple operation.

Japanese Utility Model Publication No. 7-5278 (Fig. 1-2)

  The problem to be solved is to eliminate the above-mentioned problems due to the configuration described in Patent Document 1 of the conventional submersible pump described above, and in the installation of a portable temporary pump, the pump falls and a large impact load is applied to the pump legs. Even when it is applied, it absorbs shock load and prevents pump leg damage, stabilizes the pump seat and absorbs pump vibration during operation, but the pump leg protection member can be easily used without tools It is an object of the present invention to provide a submersible electric pump equipped with a protection member for a pump leg that is excellent in assembly and maintenance with a shock-absorbing mechanism that can be detached and mounted firmly.

    In order to achieve the above object, the present invention is configured as follows.

  The invention according to claim 1 is provided with an oil chamber at the lower end of the motor, and an impeller is fitted to a motor shaft extending portion extending through the oil chamber, and the outer periphery thereof is surrounded by a pump casing. A plurality of protrusions are provided on the lower end surface of the pump casing, and the tip opening of the tipper-shaped elastic member extending downward is inserted into the recess in the pump leg in which the inside of the lower end opening is hollow. The outer surface of a plurality of fitting ribs provided on the outer surface of the provided protrusion is fitted to the inner peripheral surface of the recess of the pump leg so that the leg protection installation body is attached to the pump leg, and the leg Stabilize the pump while protecting the pump leg with the leg protection installation body equipped with multiple contact recesses on the contact surface with the lower end surface of the pump leg in the protection installation body and the buffering mechanism by the fitting rib. Configured to absorb pump vibration during operation. It is to feature a.

  According to a second aspect of the present invention, there is provided, according to the first aspect of the invention, a wedge provided inside a pump leg in which a plurality of lower end openings projecting from the lower end surface of the pump casing are recessed in a hollow shape. By the rib, the leading end of the wedge rib is wedged into the V-shaped groove formed on the protrusion projecting from the leg protection installation body, so that the fitting rib is pushed outward. The leg protection installation body is configured to be firmly attached to the pump leg by being fitted to the inner peripheral surface of the recess of the pump leg.

  According to the first and second aspects of the present invention, the recess in the pump leg is provided by the wedge rib provided inside the pump leg in which the inside of the lower end opening projecting from the lower end surface of the pump casing is recessed. The outer surface of the plurality of protruding ribs provided on the outer surface of the protrusion protruding from the leg protection installation body of the tipper-shaped elastic member extending downward is inserted into the protrusion. The leading end portion of the wedge rib is wedged in the V-shaped groove, so that the fitting rib is pushed outward and fitted to the inner peripheral surface of the recess of the pump leg, and the leg protection installation body Is firmly attached to the pump leg, and a plurality of contact recesses formed on the contact surface with the lower end surface of the pump leg in the leg protection installation body and the contact surface of the contact and the contact of the fitting rib A leg protection installation body equipped with a shock-absorbing mechanism that uses the relief of external force by a non-contact recess. When installing a portable temporary pump, even if the pump falls and a large impact load is applied to the pump leg, the pump seat is stabilized and the pump sitting is stabilized while absorbing the impact load and preventing the pump leg from being damaged. However, without using a tool, the leg protection installation body can be easily removed by the wedge action generated by the wedge tip of the wedge rib being wedged in the V-shaped groove. It has the effect that it can be firmly attached by being fitted to the inner peripheral surface of the recess of the pump leg while inserting the fitting rib that is provided on the protrusion of the leg protection installation body.

  Further, as described above, since the leg protection installation body of the elastic member is inserted into the lower end surface of the pump leg, mechanical processing such as screwing of the screw is required for mounting the leg protection installation body. In addition, since it can be easily attached and detached, the assembling work is easy, and there is an effect that the production cost is not increased and the assembling and maintenance properties are excellent.

It is the lower part vertical side view of the submersible electric pump with which the leg protection installation object concerning the present invention was inserted and installed inside the pump leg. It is a principal part expansion vertical side view in the XX line of FIG. It is the principal part vertical side view which showed the pump leg part of the pump casing which concerns on this invention. It is a principal part bottom view of FIG. It is an enlarged plan view of the leg protection installation body according to the present invention. It is an expansion vertical side view of FIG. FIG. 6 is an enlarged right side view of FIG. 5. FIG. 6 is an enlarged front view of FIG. 5.

  An embodiment of a submersible electric pump in which a leg protection installation body of the present invention is mounted on a pump leg will be described in detail with reference to FIGS. 1 to 8 of the accompanying drawings.

  1 to 8, reference numeral 1 denotes a motor for driving a submersible electric pump, and reference numeral 2 denotes an oil chamber provided at a lower end of the motor 1. The motor shaft 3 extends from the motor 1 through the oil chamber 2. The shaft seal device S that is fitted and installed in the oil chamber 2 prevents water from entering the motor 1. 4 is an impeller that is fitted to the leading end of the motor shaft 3. A pump casing that surrounds the impeller 4, and a wedge rib 6r provided inside a pump leg 6 in which a plurality of lower end openings projecting from the lower end surface of the pump casing 5 are recessed in a hollow shape, Engraved on a protrusion 7t protruding from a leg protection installation body 7 formed of an elastic member such as rubber or soft resin, which is formed in a tipper shape that extends downward and is inserted into the recess 6o in the pump leg 6. The leading end of the wedge rib 6r is inserted into the V-shaped groove 7s. As a result, the plurality of fitting ribs 7r, 7r projecting in the longitudinal or circumferential direction on the outer surface of the convex element 7t are pushed outwardly to the inner peripheral surface of the concave part 6o of the pump leg 6. The leg protection installation body 7 is firmly attached to the pump leg 6 by being fitted, and a plurality of contact recesses are formed in the contact surface 7f of the leg protection installation body 7 with the lower end surface of the pump leg 6 7o and 7o and the leg protection installation body 7 provided with a buffer mechanism by the fitting ribs 7r... 7r stabilizes the sitting of the pump while protecting the pump leg 6, and absorbs pump vibration during operation. Desirably, by providing the bottomed hole 7H in the convex 7t of the protective installation body 7, the convex 7t itself is also easily elastically deformed, so that the mounting / removability of the pump leg 6 is improved. It can also be configured as follows.

  INDUSTRIAL APPLICABILITY The present invention can utilize sewage, muddy water, and the like at a temporary site such as a river or a pond swamp for drainage to a predetermined destination by a portable submersible electric pump.

DESCRIPTION OF SYMBOLS 1 Motor 2 Oil chamber 3 Motor shaft 4 Impeller 5 Pump casing 6 Pump leg 6o Recess in pump leg 6r Wedge rib in pump leg 7 Leg protection installation body 7f Contact surface of leg protection installation body 7o Leg protection installation body Contact recess 7r Fitting rib of leg protection installation body 7s V-shaped groove of leg protection installation body

Claims (2)

  An oil chamber is provided at the lower end of the motor, and an impeller is fitted to a motor shaft extending portion extending through the oil chamber, and the outer periphery thereof is surrounded by a pump casing. The inside of the projecting lower end opening is inserted into the recess in the pump leg that is recessed in a hollow shape, and the outside of the convex projecting on the leg protection installation body of the tipper-shaped elastic member that extends downward The outer surface of the plurality of fitting ribs provided on the side surface is fitted to the inner peripheral surface of the recess of the pump leg so that the leg protection installation body is attached to the pump leg, and the pump leg under the leg protection installation body A leg protection installation body provided with a plurality of contact recesses on the contact surface with the end surface and a buffer mechanism with the above-mentioned fitting ribs stabilizes the pump seat while protecting the pump legs and pump vibration during operation Underwater characterized by being configured to absorb Dynamic pump.   A plurality of protrusions are provided on the lower end surface of the pump casing, and the inside of the lower end opening is recessed in a hollow shape. When the leading end of the wedge rib is wedged in the V-shaped groove, the fitting rib is pushed outward and fitted to the inner peripheral surface of the recess of the pump leg to protect the leg. The submersible electric pump according to claim 1, wherein the installation body is configured to be strongly attached to the pump leg.

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