JPH075278Y2 - underwater pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a submersible pump in which a pump casing is integrally provided with a motor casing below a motor casing, and a suction port is opened at a lower portion of the pump casing. Regarding the improvement of its legs.

[Prior Art] As is well known, a submersible pump is configured such that a pump integrated with an electric motor is put into water and the discharge water of the pump is guided from a discharge pipe thereof. In such a submersible pump, if the suction port is installed at a position as low as possible, water in a relatively shallow water tank or the like can be sucked in. Therefore, the suction port of the pump is opened downward and the electric motor is set upward. It is arranged. By the way, the water to be sucked contains dust and the like, so that the water sucked into the pump flows through the strainer to the suction port. Whether the pump is installed in a river or in a water tank, legs are necessary for stable pump installation.

Therefore, as shown in, for example, Japanese Utility Model Publication No. 60-178392, a strainer is made up of a rubber lower disk having radial grooves formed on the lower surface side and a large number of water intakes fixed to the upper surface of the disk. It has been proposed that the plate-shaped member is composed of an upper disc made of metal with a mouth bored, and the strainer is fixed to the lower peripheral wall of the pump casing with bolts.

According to this, it is recognized that water can be sucked into a shallow water tank or the like, and the lower disk made of rubber can absorb the vibration of the pump and the like so that the pump can be stably installed.

[Problems to be solved by the invention] However, the strainer used there is an upper disc made of metal with a large number of water intake holes and a lower disc made of rubber in which radial grooves are formed is integrated by baking. It is a special one and is more expensive than a normal strainer. In addition, the groove formed in the lower disc made of rubber is blocked by mud or the like and is no longer used as a flow path,
It is conceivable that the lower disc made of rubber may peel off from the upper disc made of metal as it is used.

Therefore, the present invention solves the above-mentioned drawbacks of the conventional one, and uses a normal strainer as a strainer just by making a hole in a metal plate, and is capable of sucking water in a shallow water tank or the like. It is equipped with legs that can absorb the vibration of the pump and install the pump in a stable manner.It is also possible to remove the legs and strainer without using a special tool when cleaning the strainer, checking the pump, or repairing it. The purpose of the invention is to provide a submersible pump that can be used.

[Means for Solving the Problems] According to the present invention, 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 the suction port is opened in the lower portion of the pump casing, the suction port of the pump casing is A flange portion projecting downward is provided on the periphery, and a flat strainer is attached to the flange portion with a bolt, and the head of the bolt is detachably covered with an elastic member constituting a pump leg, and the elastic member is a bolt. In the practice of the invention, the elastic member is preferably constructed of anti-vibration rubber and has a first portion between the head and the strainer and a second portion below the head of the bolt.

[Operation] When the electric motor operates and the impeller rotates, water is sucked from the suction port and discharged to the discharge pipe. The sucked water is sucked through the strainer, and dust contained in the water is strained. Are removed by. At that time, since the strainer has a flat plate shape and is provided at the lower end of the pump casing, it also sucks water in a shallow water tank or the like. Further, the vibration of the pump is absorbed by the elastic member serving as the leg that covers the head of the bolt that fixes the strainer. When cleaning the strainer or inspecting or repairing the pump, remove the elastic member covering the head of the bolt, rotate the bolt with an appropriate tool to remove it, and remove the strainer from the pump casing for inspection and repair. .

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, an electric motor M includes a motor casing 1, the motor casing 1 includes a stator 2 and a rotor 3, and a motor rotating shaft 4 extends downward.
And, it is rotatably supported by a bearing 5 provided in the motor casing 1. The electric motor M has a structure known per se and rotates the rotating shaft 4 by the electric current from the cable W. On the other hand, the pump P is provided with a pump casing 8, which houses the impeller 6, and the impeller 6 is fixed to the rotary shaft 4 by bolts 7. A discharge pipe 9 is provided integrally with the pump casing 8. A suction port 10 is opened in the lower center of the pump casing 8. A seal device 11 is provided between the motor casing 1 and the pump casing 8.
A seal chamber 12 having the above is formed.

Below the pump casing 8, a flange portion 13 formed integrally with the pump casing 8 extends downward. The flange portion 13 is, for example, a cylindrical body surrounded by a cylindrical shape and is provided around the suction port 10. At its lower end, a flat plate strainer 14 is provided, and the strainer 14 is provided with a large number of small holes 15. Then, an appropriate number (for example, 3
The strainer 14 is fixed to the flange portion 13 by bolts 16).

FIG. 2 shows an elastic member 17 which constitutes a leg according to the present invention. The elastic member is made of, for example, a vibration-proof rubber and has an inverted truncated cone shape as a whole. It is covered.

Therefore, between the head 16a of the bolt 16 and the strainer 14, that is, on the upper side of the head 16a of the bolt 16, the first portion 1
7a is formed and below the head 16a of the bolt 16 there is formed a second part 17b, for example located on the bottom of the aquarium, and the strainer 14 has a flange 1 through the first part 17a.
It is sandwiched between 3 and the head 16a of the bolt.

Therefore, in operation, when the electric motor M rotates the rotary shaft, the impeller 6 causes the discharge pipe 9 that has sucked in water from the suction port 10.
The water that is discharged but is sucked through the small holes 15 of the strainer 14, and the dust contained in the water is removed by the strainer 14. At that time, since the strainer 14 is provided at the lower end of the pump casing 8 and is located at a low position, shallow water can be sucked in.

Then, for example, when the bolt 7 that fixes the impeller 6 to the rotating shaft 4 is removed in order to disassemble the impeller 6 during inspection, the elastic member 17 is removed from the head 16a of the bolt 16,
The strainer 14 can be easily removed by turning and removing the bolt 16 with an appropriate tool. Assembly is also easy.

Further, the head 16a of the bolt 16 is elastically supported by the first and second portions 17a and 17b at the top and bottom, and the vibration of the pump can be suitably absorbed.

[Effects of the Invention] The present invention has the following excellent effects.

(I) The strainer has a flat plate shape and is attached to the lower end of the pump casing and is located at a low position, so that water in a shallow water tank can be sucked in and the strainer has a large area even at a low water level. is there.

(Ii) The vibration of the pump is absorbed by the elastic member serving as the leg, and the pump can be installed stably.

(Iii) Since the elastic member that serves as the leg is attached by using the head of the bolt for attaching the strainer, another attaching member for attaching the elastic member is not required.

(Iv) The elastic member that serves as a leg is attached to and detached from the bolt head by utilizing its elasticity. Therefore, when inspecting or repairing the pump, remove the elastic member from the bolt head and use a normal tool to bolt. You can turn it to remove it for inspection and repair. Also, in the case of assembly, the bolt can be tightened with a normal tool to easily assemble.

(V) The elastic member that serves as a leg is attached to the head of the bolt by utilizing its elasticity, does not require work such as seizure for attachment, and is inexpensive in combination with point (iii). Can be provided to.

[Brief description of drawings]

FIG. 1 is a side view showing a partial cross section of a submersible pump according to the present invention, and FIG. 2 is a side view showing a partial structure of a leg according to the present invention. P ... Pump, 4 ... Rotating shaft, 6 ... Impeller, 8 ... Pump casing, 10 ... Suction port, 13 ... Flange part, 14
...... Strainer, 16 …… Bolt, 17 …… Elastic member, 17a
...... First part, 17b ...... Second part

Continuation of the front page (56) References Open 54-147801 (JP, U) Open 54-164904 (JP, U) Open 60-178392 (JP, U) Open 57-167290 (JP) , U) Actual development Sho 53-6445 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A submersible pump in which a pump casing is integrally provided with a motor casing below a motor casing, and a suction port is opened in a lower portion of the pump casing, and a flange portion protruding downward around the suction port of the pump casing. And a flat 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 provided between the head of the bolt and the strainer. A submersible pump having a first portion and a second portion below the head of the bolt.