JPS5823287A - Mounting method of part to well pump - Google Patents

Abstract

PURPOSE:To surely joint a pipe to a steel plate easily and at low cost, by processing an end part of the pipe to horn shape, forming a flange part to the end part of the pipe, mounting said flange part to a through hole of the steel plate and performing resistance welding. CONSTITUTION:A pipe 3 is formed by cutting a general steel pipe, provided with a flange 12 to the upper end by forming a horn shaped opening angle about 90 deg. and provided with a screw 13 to the lower end screwed with a part of pressure switch 2 and the like. A through hole 14 is provided to a pressure tank 1, and the flange 12 of the pipe 3 is engaged to the through hole 14, then resistance welding is performed in this engagement part. The mounting method by the resistance welding is different from the mounting method interposed with a packing by using bolts and nuts, and the connection can be surely performed by the welding additionally without the necessity for again handling the inside of the tank 1 by hand, then replacement of the pipe 3 is not required to be considered.

Description

[Detailed description of the invention] The present invention relates to a method for attaching parts to a well pump.

The parts forming the water passage of a well pump have been attached by tightening bolts and nuts through a backing, or by welding the parts together.

The former method has the advantage of being easy to assemble and can be disassembled, but for parts that cannot be easily accessed inside and outside of the part, such as parts attached to the pressure tank of a well pump, tightening with bolts and nuts is recommended. It required a tedious process such as keeping it in place.

For this reason, for example, a pipe for mounting a pressure switch, etc., is a pipe-shaped part whose collar is formed on a lathe and fixed to a pressure tank with a through hole previously formed by arc welding or resistance welding.

However, machining the flanges with a lathe resulted in a lot of material loss, and the machining was very time-consuming.

In a well pump, in addition to the pipe for installing the pressure switch, there are two pipes that connect the pressure tank and the pump part, and there are also two pipes that connect the pressure tank and the pump part, and there are also two pipes that connect the pressure switch and the inside of the sedge cap that forms the drain plug. A large number of pipes had to be joined to the tank, and since pressure was normally applied, they had to be watertight, so reliable welding or other methods of joining were required.

In view of these circumstances, an object of the present invention is to provide a method for attaching parts of a well pump by forming a through hole in a steel plate and joining a pipe to the through hole easily and reliably at low cost.

Hereinafter, the present invention will be explained based on one embodiment shown in the drawings. Fig. 1 is a diagram showing the configuration of a general well pump, and Fig. 2 is a diagram showing the main part of the state of the pipe according to the present invention. FIG. 3 is a longitudinal sectional view of the main part showing the welded state.

In Fig. 1, the method for installing parts of a well pump is that a pressure tank 1 is provided with a pipe 3 for mounting a pressure switch 2, a pipe 5.6 communicating with the pump part, and a pipe flange forming a drain plug. It is being

A pipe 10.1 installed in the water intake port 8 and the water supply port 9
1 is provided in the pressure tank 1.

In FIG. 2, a pipe 3 as a component is formed by cutting a general steel pipe, and has a trumpet-shaped opening angle a of approximately 90 degrees at the upper end and a collar 12. Screw 1 to which parts such as pressure switch 2 are screwed onto the lower end
3 is provided.

In FIG. 3, the pressure tank 1 is provided with a through hole 14, the collar 12 of the tube 3 is engaged with the through hole 14, and the engaged portion of the collar 12 is resistance welded.

In such a configuration, the method for attaching the parts of the well pump is to form a through hole 14 in a suitable place in the pressure tank 1 during a forming process such as press drawing, and to insert a pipe material into the through hole 14 into an appropriate length. Then, a collar 12 is formed at one end with a trumpet-shaped opening angle of about 90 degrees.

Then, the other end of the tube 3 is machined with a screw 13 as necessary to form a component.

Furthermore, the tube 3 made into a component is inserted into the through hole 14 of the pressure tank 1, and the collar 13 of the tube 3 is engaged with the edge of the through hole 14.
Resistance welding is performed at this engaging portion.

The pipe 3 should be attached by resistance welding during the process of forming the pressure tank 1, and the bottom plate should be attached beforehand.

Therefore, the pipe 3 is fixed from the inside and outside of the pressure tank 1 using a jig and resistance welded, and once the pressure tank 1 is assembled, it is impossible to reach inside the pressure tank 1, but installation by resistance welding requires the use of a backing. Unlike mounting with bolts and nuts, there is no need to insert hands into the pressure tank 1 again, and there is no need to consider replacing the pipe 3 since a reliable connection can be made.

In particular, by forming an opening angle a of about 90 degrees at one end of the pipe 3, contact between the through hole 14 formed in the pressure tank l and the collar 12 is convenient for resistance welding, and reliable welding can be performed. Since a general pipe material can be used for the tube 3, it can be manufactured easily and at a very low cost.

The pressure tank 1 has a large number of such pipes 3.5.6.
, '/, 10.11 is attached, the effect in manufacturing is great, and since it is securely attached, there is no need for water leakage, and the reliability of assembly can be improved.

In addition, in many well pumps, the water inlets 9 are provided at three locations at 90-degree intervals on the outer periphery of the lower part of the pressure tank 1 so that it can be easily replaced with a different model. The effects of invention will be greater.

In particular, the pipes 10 and 11 installed in the water supply port 9 and the water intake port 8,
Since the piping is done by 7 lunges with the backing interposed, the collar of the pipe 10% 11 can be used as the contact surface of this backing. If this is done, it will be effective as a contact surface for backing (5).

As explained above, according to the present invention, parts can be easily and securely installed by forming a collar at one end using a general pipe material, making a through hole in the steel plate of the pressure tank, and then contacting the buckwheat and resistance welding. The effect on well pumps is particularly great, and its value is of great value in industry.

[Brief explanation of drawings]

It is a vertical cross-sectional view of the main part. Happy 3 figures
Hot. l...Pressure tank, 3...Pipe, 12°...Brim, a...Opening angle. Patent applicant Shibaura Seisakusho Co., Ltd. (6) 14 12 1 521-

Claims (1)

[Claims] The end of the tube material is processed into a trumpet shape to form a flange, and the flange is attached to a through hole in a steel plate and resistance welded.