JPS5825878B2 - Submersible pump installation equipment - Google Patents

Description

[Detailed Description of the Invention] Conventionally, a submersible pump installed underwater has been made to be able to be raised and lowered by a guide mechanism for inspection and maintenance, etc., and an appropriate locking means has been used to connect the pump to a discharge fitting fixed in the water when the pump is lowered. The connecting flanges provided on both sides automatically come into contact with each other.

Among these locking means, there is also known a surface contact type, that is, a type in which a contact surface with an inclination angle to the abutting surface of the connecting flange and a slight length produces a complete wedge action to strengthen the pressure contact between the abutting surfaces. However, both the pump side and the discharge fitting side form two angled surfaces, and it is extremely difficult to match them from a manufacturing standpoint, so it has not been put to practical use.

Moreover, even if it were possible, the disadvantage is that a great deal of force would be required to lift the pump in this case.

As a means for releasing the wedge action at the time of retrieval as mentioned above,
As shown in Publication No. 1, there are some devices in which the lowest point of the engaging surface of the locking means is set to be the same as or higher than the highest point of the abutting surface of the connecting flange, but in this case, the discharge pressure during pump operation is If the value exceeds a certain value, the pump will be easily rotated in the direction of releasing the wedge action in the same way as when lifting the pump, and the lower part of the connecting flange surface will open, so the weight of the pump or the lowest part of the locking part will be reduced. The length of the arm from the point to the center of gravity on the pump side must be made longer, which of course leads to an increase in the size of the device, which is unavoidable.

After all, the current locking means generally tend to avoid the complete wedge action of surface contact, which is the most disadvantageous problem as mentioned above, and instead rely on line contact, which has a slightly weaker locking force.

Therefore, when the discharge pressure during pump operation exceeds a certain limit as shown in the above-mentioned Japanese Patent Publication No. 49-37441, the pump easily rotates about the locking point and the lower part of the abutting surface of the connecting flange Although the risk of the pump opening is relatively low, the drawback that a large lifting force is required to release the wedge action when the pump is lifted remains unsolved.

In view of the above-mentioned circumstances, the present invention has been developed so that connecting flanges mutually provided between the pump main body, which is guided up and down by a guide mechanism, and a discharge fitting fixed to the tank bottom are automatically pressed into contact with each other by a locking means. In the device, the abutment surface of the connecting flange is provided parallel to the guideline formed by the guide mechanism, and the locking means is provided in a long groove in the vertical direction that is inclined upwardly with respect to the guideline at the rear of the connecting flange of the discharge fitting. It is composed of a rotatably interposed rod member and a locking member protruding from the pump side beyond the connecting flange portion, and the rod member performs a locking action while positioned at the bottom of the long groove, When the pump is hoisted, the rod member and the locking member rise slightly within the long groove, making it easier to release the wedge action during hoisting.The purpose of this is to reduce the bow lifting force without impairing the leakage prevention effect during pump operation. The purpose of the present invention is to provide an installation device for a submersible pump that can reduce the amount of water used.

To explain in detail the embodiment shown in the figure, 1 is a submersible pump directly connected to a submersible mode, and at the tip of the discharge port there is a connecting flange 2 whose end surface is vertical when installed, and from the back of the flange to the flange part. protrudes in the discharge direction, and has outward semicircular parts at both ends in the upper and lower directions perpendicular to the discharge direction.
The guide portion 3 provided in the step and the locking member 4 hanging in an inclined manner in front of the connecting flange 2 are integrally formed.

Reference numeral 5 denotes a discharge fitting fixed on the bottom part 6 of the water tank, and two guide rods 7 are vertically provided on both sides so as to engage with the guide part 3 and guide the submersible pump 1 when going up and down. Further, at one end thereof, a connecting flange 8 is provided perpendicularly and parallel to the guide rod I, which can abut the connecting flange 2 in the pump lowered position.

Further, when the submersible pump 1 descends to the rear of the connecting flange 8 and the connecting flanges 2 and 8 abut, they are engaged in line contact with the lower inner surface of the locking member 4 approximately on the upper and lower bisectors of the abutting surface. a bracket portion 9 that forms a vertically long groove 9a that is inclined to open upwardly with respect to the guide rod 7 so that the abutting surfaces of the flanges 2 and 8 can be brought into pressure contact with each other by creating a wedge action;
A rod member 10 is interposed in the long groove 9a so as to be freely removable.

The rod member 10 is provided with two circumferential grooves, and the C-ring 1
1 prevents the rod member 10 from falling out of the long groove 9a.

Reference numeral 12 denotes a discharge pipe connected to the opposite end of the flange 8 of the discharge fitting 5, which is appropriately extended and extends outside the tank, 13 is a pump suspension ring, and 14 is a suspension chain that is suspended almost directly above the center of gravity of the pump 1. It is arranged as shown below.

1, in the lowered position of the pump 1, the rod member 10 is at the bottom of the long groove 9a, and the flange 2
, 8 in line contact with the inner surface of the locking fitting 4 on the upper and lower bisectors of the abutting surfaces of the flanges 2 and 8, thereby bringing the flanges 2 and 8 into pressure contact with each other.

Therefore, even if the pump 1 is in operation and a discharge pressure/force is generated, depending on the pressure, there is no rotational force of the pump with the engagement point as the fulcrum 1, so the flange 2. .

There is no risk of leakage from the abutment surface of No.8.

When lifting the pump, the rod member 10 rises together with the lifting of the locking member 4 while rolling slightly in the long groove 9a due to friction, but the long groove 9a is opened upward with respect to the guide rod 7. Since it is tilted, the frictional force with the locking member 4 is rapidly weakened, so that the pump lifting force is small.

In the above explanation, two locking mechanisms were provided on both sides of the rear part of the flange 8, and the locking point was placed on a line that bisects the flange mating surface in the vertical direction, so that the locking force in the locked state is at the best position. However, even if there are two locking mechanism parts and an engagement point above these, or if there is a single locking mechanism with an engagement point further above, the wedge action when lifting the pump will be reduced. The release force is likewise low.

As detailed above, when using the device of the present invention, the connecting portion locking means has a rod member on the discharge fitting side that engages with the pump side locking member, which is movably interposed in the inclined long groove.
Almost no force is generated to move the rod member due to the pump discharge pressure in the pump operating state, that is, there is no adverse effect on the locking force in the pump operating state, and the wedge action is released with the minimum force when the pump is withdrawn. It has the same effect as that of a dog.

[Brief Description of the Drawings] Figure 1 is a front view showing one embodiment of the present invention, Figures 2 and 3 are sectional views from A to A and B to B in Figure 1, respectively, and Figure 4 is only the main part. FIG. In the figure, 2 and 8 are connecting flanges, 3 is a guide part, 4 is a locking member, 5 is a discharge fitting, 7 is a guide rod, 9 is a bracket,
9a is a long groove, and 10 is a rod member.

Claims (1)

[Scope of Claims] 1. When the pump body, which can only be raised and lowered by the guide mechanism, is lowered, the connecting flange of the discharge fitting fixed to the bottom of the tank and the connecting flange on the pump side are automatically engaged by the locking means. In the device, the abutment surface of the connecting flange is provided parallel to the guideline formed by the guide mechanism, and the locking means is provided such that the abutting surface of the connecting flange is parallel to the guideline provided by the connecting flange of the discharge fitting, and It is composed of a rod member that is movably interposed in a vertical long groove that is inclined to open upward, and a locking member that projects from the back of a connecting flange on the pump side beyond the flange, and the rod member is inserted into the long groove. A locking action is performed when the pump is located at the bottom, and when the pump is pulled up, the rod member moves upward in the long groove together with the locking member on the pump side, thereby alleviating the lifting force. , submersible pump installation equipment. 2. The locking means by engagement between the rod member and the locking member is
An installation device for a submersible pump according to claim 1, which is provided at one location on a discharge fitting. 3. The locking means by engaging the rod member and the locking member is
An installation device for a submersible pump according to claim 1, wherein the device is installed on both sides of a discharge fitting. 4. The locking means by engagement between the rod member and the locking member is
2. The submersible pump installation device according to claim 1, wherein the submersible pump installation device is provided on both sides of the discharge fitting approximately on the upper and lower bisectors of the abutting surface of the connecting flange.