JPS58107897A - Westco pump - Google Patents

Abstract

PURPOSE:To aim at a sharp reduction in the number of items in parts, by detachably coupling a seal box and a casing cover together via water sealing members where a headrace part and a steam separation chamber are made up at each end face of a casing with a rustproof metal. CONSTITUTION:A seal box 19 and a casing cover 17 set up oppositely via each slender clearance are constituted with a rustproof metal at both end faces of an impeller 14 being coupled with the rotary shaft of a motor. Both the seal box 19 and the casing cover 17 are detachably coupled with both end faces of a casing 2 via each of water sealing members 18 and 20 where a headrace part 21 and a steam separation chamber 3a are unified in one with an iron casting. Therefore, unlike any other conventional Westco pump in which those of casing, self-priming case and suction pipe are separately constituted, expenses for casting dies and casting and machining costs will not be expensive.

Description

[Detailed description of the invention] This invention relates to improvements to Wesco pumps.

An example of a conventionally known Wesco pump will be explained with reference to FIGS. 1 and 2e. In Figure t, 1 is a bracket for the wake-up mechanism, 2 is a casing made of iron casting that is connected to one end surface of this bracket 1 with a screw 1u, and 2a is formed on one side of this casing 2. A through hole 2b is provided at the exit portion. 2C is this casing 2
The water cut wall 2d is one side of this water cut wall 2C (
2e is the suction port provided on the other side of the drain wall 2C. a
++[i communicates with the discharge port 2e. 3b is a suction channel provided in the self-priming case path 3I, and 3C is an opening provided in this suction channel abt, which communicates with the suction port 2d.

3d is a priming port provided in the air-water separation chamber 3a, which is a female thread, and 8e is a female thread provided in the suction channel 8b.
3f is a stepped through hole provided in the suction channel 3b and is disposed on the same axis as the thin through female thread 3e. 5 is priming port 8d
The faucet is removably screwed onto the faucet, 6 is a threaded internal thread 3e
It is a stopper that is removably screwed onto the body and has a bottomed hole 6a in the center. 7 is an annular valve seat fitted into the large diameter part of the stepped Sada-through hole 3f, 8 is a reverse valve with a protrusion at one end and is loosely fitted into the bottom hole 6at, 9 is fitted into the hm hole with membrane 3f. A water suction pipe 11 is connected to the water supply pipe through an O-ring 10, and 11 is a water supply pipe that connects the μ through hole 3g provided in the self-priming case 3I in a watertight manner via an O-ring 12. It protrudes into the water separation chamber 3a. Reference numeral 18 denotes a molecular shaft of the rotor shaft, one end of which protrudes into the casing 2. Reference numeral 14 designates a flywheel fitted into the protrusion rX11 of the rotor shaft 18 within the casing, and 15 represents the inner end surface of the casing 2. It is a liner made of copper alloy bonded to the - part is /% Na car model 4 one end face and Nl111
They are connected via ij. 16 is a mechanical seal fitted onto the inner peripheral surface e of the bulging portion 2a; 17 is the casing 2;
A casing cover made of a copper alloy that is watertightly and removably connected via an O-ring 18 at one end.
It is opposed to the other end surface of 4 with a gap in between.

Next, as described above (1f1 was completed, the operation t gets stuck and 1 is completed. Prime water is injected from the priming port 3d and the faucet tap 5
When the electric motor operation switch is closed after tightening, the rotor +1Q1118 and the blade 14 will rotate. )) Neguruma 1
4 rotates, the water in the casing 2 flows through the discharge port 2C.
1>, the air enters and exits the air separation chamber 3a, and the inside of the casing 2 and the suction channel 8b sequentially become negative pressure, so the return valve 8 is guided by the bottomed hole 6a and moves upward t to form the stepped 1. 'The outlet hole 3f is opened, and the water in the water suction pipe 9 mixes with priming water and flows into the casing 2. At the same time, the water around the flywheel 14 in the casing 2 is pressurized and accelerated by the flywheel 14t. The water pipe 11 passes through the passage, the discharge port 2e, and the air/water separation chamber 3a.
is discharged. In this case, water containing air flows into the large-volume steam-water separation chamber 8a from the discharge port 2e of the Kotani product, resulting in a vortex and a deceleration of the water flow.
Due to the surface impact of the water against the wall surface, etc., the water and this water e
This is separated from the air contained therein.

Most of the air is sent along with some water through the water pipe, but from the outlet 2e there is moisture! The water flowing into #yaa flows down to the discharge port 26 again together with some air, and is pressurized and accelerated by the squirrel wheel 14, and the air inside the water suction pipe 7 is
After the 8th suction, the self-priming action is completed and the well water is pumped up.

As mentioned above, in this type of Wesco pump of slave A, the casing 2, self-priming case 3, and water suction R9 are formed separately, so the casting mold cost, casting work cost, and machining cost are reduced. It had the disadvantage of being expensive.Also, mechanical seal 1
6 is fitted onto the inner circumferential surface of the protruding portion 2a of the casing 2, which is made of iron casting, so that there is a problem in that the inner circumferential surface is creased and water leaks. In addition, since the liner 15 is connected to the casing 2, it is necessary to machine the liner 15 fitting part of the casing 2 with high precision. After the fitting part of the casing 2 is fitted, it is necessary to perform high-precision processing on the contact surface with the hinge part 14, which in combination with the above increases the cost and reduces the quality. There was something missing.

The present invention has been made in an attempt to eliminate such drawbacks, and one embodiment of the present invention will be described with reference to FIGS. 3 and 4. In the figure, 2 is a casing in which the steam/water separation chamber 3a, the suction channel 3b, and the water suction pipe 9 are integrally formed of cast iron, 19 is a joint (5) which is freely joined, and the other end is screwed into a bracket TT. has been done. Incidentally, it goes without saying that the inner end surface of the seal box 19 is opposed to one end portion of the honeycomb 14 with an aluminum field interposed therebetween. In addition, the water guide portion 21 is formed by the suction channel 8b and the water suction pipe 9.
is formed. The other configurations and operations are the same as those of the conventional Wesco pump, so explanations will be omitted. In addition, in this embodiment, the seal box 19 and the casing cover 17
Although the embodiment has been described with respect to a structure in which the structure and the structure are made of a copper alloy, the structure is not limited to this embodiment, and may be formed of a non-rusting metal such as stainless steel.

Further, in this embodiment, the water sealing member was described as an O-ring, but it is needless to say that the present invention is not limited to this embodiment.

As explained above, this invention has a water guide section and a steam/moisture 1i
A seal box made of rustless metal and a casing cover are removably connected to one end surface of each of the casings in which the 11 chambers are integrally formed of cast iron through a water sealing member. Therefore, the number of parts is greatly reduced, and since the mechanical seal is fitted to the inner circumferential surface of the seal box, there is no water surface leakage due to ρ11, and to provide a low-cost, high-quality Wesco pump. There is an effect that can be done.

[Brief explanation of the drawing]

Figures 1 and 2 show conventional Wesco pumps.
FIG. 1 is a partially sectional front view, FIG. 2 is a partially sectional side view, FIGS. 3 and 4 show an embodiment of the present invention, and FIG.
The figure is a partially sectional front view, and FIG. 4 is a partially sectional 1-side view. In the figure, 2 is the casing, 3a is the air-water separation chamber, and 8b
is the suction channel, 9 is the water suction pipe, 13 is the rotor shaft, 14 is the fly wheel, 17 is the casing cover, 18.20 is the O-ring, 1
9 is a seal box, and 21 is a water guide section. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Shin Kuzuno - (7) Figure 1

Claims (1)

[Claims] A seal box and a casing cover are formed of non-rusting metal and are disposed opposite to each other through a gap on both end faces of the connected fly wheel during the rotation of the electric motor. 1. A Wesco pump characterized in that a steam separation chamber and a steam separation chamber are removably connected to both end surfaces of a casing integrally formed of cast iron through water sealing members.