JPS59597A - In-line pump apparatus - Google Patents

Abstract

PURPOSE:To reduce the weight and the manufacturing costs of an in-line pump apparatus and to increase the corrosion resistance of the same, by forming a casing by a plurality of passage forming molds, drawing out the molds after injecting resin by use of these metal mold groups, and then attaching a cover member. CONSTITUTION:A casing is constituted by a passage A extending coaxially with a discharge opening 6c, a passage B extending substantially coaxially with the passage A, a passage C communicated perpendicularly with the passage B, extending substantially in parallel with the passage B and opened on the opposite side of a motor 1, a passage D communicated at one end thereof with the passage C and at the other end with a suction opening 6b, and a cover member 7 attached to the opening of the passage C. The casing is formed by drawing molds after injecting a resin by use of metal mold groups consisting of the molds for forming the passages A-D, and then attaching the opening cover 7, whereby it is enabled to reduce the structural parts.

Description

[Detailed Description of the Invention] The invention of B relates to improvements in in-line pump devices used in houses, small buildings, or greenhouse horticulture, and in particular relates to VIJ oiling of the bomb (1) pump casing.

An example of a conventional type of pump device will be explained with reference to FIG. In the figure, 1 is an electric motor serving as a drive source, 2 is a load-side bracket of the electric motor 1 of B, and 3 is a rotary motor whose one end is rotatably supported by this load-side bracket 2 via a ball bearing (not shown). A child shaft, 4 is a mechanical seal fitted to the rotor shaft 3 and the load side bracket 2, 5 is a flywheel fitted to one end of the rotor shaft 3, and 5g is a suction of the flywheel 5. 5b is the discharge side of the flywheel 5, 6 is the casing in which the fitting part 6a is watertightly connected to the fitting part 2a of the load side bracket 2, and 6b and 6c are the casings provided in the casing 6 of B. The suction port and the discharge port are arranged approximately on the same axis and are approximately orthogonal to the axis of the rotor shaft 3.6d
A passage A is formed by a discharge passage provided on the same axis as the discharge port 6C. 6e is a passage B consisting of a wing wheel chamber communicating with the passage A and 6d, and 6f is a passage #C which is bent by a suction passage whose one end communicates with the suction port 6b and the other end communicates with the suction side 5a of the fly wheel 5. is forming. (2) The other end of a suction pipe, for example, one end of which is immersed in muddy water in the water heater, is connected to the suction port 6b in a watertight manner, and the other end of the suction pipe, for example, one end of which is connected to another piping system, is connected to the discharge port 6C. The other end of the discharge pipe is connected in a watertight manner (not shown).

Next, the operation of the device configured as described above will be briefly explained. After the installation of the inline pump device and the connection of the piping system connected to the inline pump device are completed, when the operation switch of the electric motor 1 is turned on, the rotor shaft 3 and the flywheel 5 are connected.
rotates one turn in a predetermined direction, and for example, when there is a shortage of water in a water heater, the suction pipe - suction rod 6b -> suction passage 6f -> suction side 5a of eight wheel ->
It circulates as follows: discharge side 5b of the fly wheel = discharge passage $6d = discharge port 6C - discharge pipe -> piping system -> inside the water heater.

An example of a conventional pump device of this type is constructed as described above, and in particular, the suction passage 6f of the casing 6 has a bent passage C.
This reduces the manufacturing cost of in-line pump equipment, improves corrosion resistance, reduces weight, and reduces the number of passages A, B,
In order to prevent deformation due to the temperature of the liquid passing through the casing 6, the resin (3) of the casing 6 was attempted to be made of resin, but it had the drawback that it could not be made into resin because it could not be removed from the mold.

Next, another example of the conventional type of pump device will be explained with reference to FIG. In the figure, the suction port 6b and the discharge port 6C, which are arranged substantially on the same axis, are arranged at a position further apart from the center of gravity of the electric motor 1 compared to the above-mentioned conventional example.

6e is a passage A, a passage B is composed of a winding wheel chamber connected to 6d, and 6f is connected to a suction port 6b at one end and a flywheel 5 at the other end.
The other constructions and operations are the same as those of the conventional example described above, and therefore the explanation thereof will be omitted.

Another example of a conventional pump device of this type is constructed as described above, and in particular, the axes of the suction port 6b and the discharge port 6c of the casing 6 are further apart from the center of gravity of the electric motor 1 compared to the above example. Since the casing 6 is disposed at a certain position, the moment acting on the casing 6 becomes large, and therefore, if the wall thickness of the casing 6 is made the same as in the above example, the deformation of the casing 6 becomes large.

(4) This invention was made in an attempt to solve these drawbacks all at once, and an embodiment of the invention of B will be described below with reference to FIG. In the figure, 6e is passage A, 6d
Passage B consisting of a flywheel compartment that communicates with the
, 6e, one end is orthogonal to the passage B, 6e, and communicates with the passage B, 6e.
The passage C16f, which is formed parallel to and has an opening on the side of the anti-type motor, has one end communicating with the passage C perpendicularly and the other end communicating with the suction port 6b, and a passage C16f that is outside the opening of the passage C. This is a cover member molded from resin that is joined to the edge and closes the opening.

In addition, when molding the casing 6 with resin, a mold group consisting of a mold for forming the passage A, a mold for forming the passage B, a mold for forming the passage C, and a mold for forming the passage are used.
4!4 After injecting the resin, handle each mold and connect the cover member 7 to the opening.

As explained above, this invention includes a passage A on the same axis as the discharge port in the casing, a passage B on almost the same axis as the passage A, and a passage (5) communicating orthogonally to the passage B. A passage C formed approximately parallel to B and open to the side of the rotor die, a passage D that communicates with passage C of B and whose one end communicates with the suction port, and an opening of passage #5C. Since the structure includes a cover member, it is possible to use resin. As a result, compared to conventional casings made of cast iron, the number of mechanical parts is significantly reduced, reducing manufacturing costs. It is also lightweight, has excellent corrosion resistance, and has almost no deformation due to liquid temperature or moment. This has the effect of allowing parties to provide in-line pump equipment.

[Brief explanation of the drawing]

Figure 1 (a partial cross-section showing an example of a conventional in-line pump device, Figure 2 a partial cross-section showing another example of a conventional in-line pump device, and Figure 3 an embodiment of the invention of B). 1 is a partial cross-sectional view. In the figure, 1 is an electric motor, 2 is a load side bracket, 3 is a rotor shaft, 5 is a flywheel, 6 is a casing,
6a is the fitting part, 6b is the suction port, 6c is the discharge port, 6d is the discharge passage, 6e is the passage B, 6gl, 8C, 6F are the passages, ? (6) is a cover member. Note that the same reference numerals in the figures indicate the same or corresponding parts. Agent Makoto Ayano -b Figure 1 Figure 2 Figure 1 Figure J

Claims (1)

[Claims] In an in-line pump device in which an electric motor and a suction port and a discharge port of a casing of a pump portion connected to the electric motor are disposed substantially on the same axis and are substantially perpendicular to the axis of the motor, the discharge port is connected to the casing. A passage A on the same axis as the outlet, a passage B communicating on the same axis as the passage A, and a passage B communicating with the passage B with one end perpendicular to the passage B, and being formed approximately parallel to the passage B. It also includes a passage C that opens on the side opposite to the electric motor, a passage D1 that communicates with the passage C and has one end communicating with the suction port, and a cover member that is coupled to the opening of the passage C and closes the opening. , an in-line pump device characterized in that the above-mentioned casing is molded from resin.