JPH0236960Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a pump with reinforced pump casing.

Conventional technology Submersible pumps and the like are used to treat wastewater from pits, rice fields, etc. The pump casings of these submersible pumps were made of cast iron or rubber.

Problems that the invention aims to solve: However, when treating wastewater containing gravel, etc., cast iron pump casings cause severe wear on the submersible pump and are not durable, while rubber pump casings reduce wear. However, the peninsula-shaped partition wall of the pump outlet installed on the side of the pump chamber and the pump outlet were bent and damaged by the impact of the pressure water repeatedly hitting them.
The joint between the pump discharge port divided into the motor side and the pump side and the intermediate casing portion of the pump discharge port on the discharge port side open due to the discharge pressure, resulting in water leakage.

Means for Solving the Problems The present invention was developed in view of the above points, and the pump casing made of rubber or soft synthetic resin is divided into a motor side and a pump side, and the pump chamber is divided into two parts: a motor side and a pump side. In pumps such as drainage pumps that have a partition wall on the side and a pump discharge port, the pump discharge port is installed in the cylindrical pump discharge port on the side of the pump chamber of the pump casing on the divided motor side. An annular reinforcing material is installed along the circumference, and a partition reinforcing material is installed inside the partition wall that protrudes like a peninsula between the pump chamber and pump discharge port of the pump casing on the divided pump side. An opening is recessed in the end face of the partition wall that partitions the pump chamber and the pump discharge port of the pump casing, and the tip of the partition reinforcing material of the partition wall of the pump casing on the pump side protrudes toward the motor side. A pump with reinforced pump casing, characterized in that the protruding tip of the partition reinforcing material of the pump side partition wall is fitted into the opening of the side partition wall to join the pump casings of the pump side and the motor side. is to provide.

Example The present invention will be explained below based on examples.

Figure 1 and the following are one embodiment of the drainage pump of the present invention. The pump 1 has a seal 2 such as an oil meal and a mechanical seal as shown in Figure 1.
The impeller 5 of the pump section 4 is rotatably driven by the motor section 3 sealed with water, and suction is drawn through a cover body 7 which also serves as a strainer and is formed by punching a number of predetermined holes 6 in the outer circumference of the pump section 4. Inhale wastewater etc. into port 8,
The pump is configured to discharge waste water to the outside through a pump discharge port 10 of the pump casing 9 and a discharge portion 11 integrally attached to the side surface of the pump. . The pump casing 9 is made of rubber material such as NBR.
As shown in the figure, it is divided into halves into a motor section side and a pump section side, and these are joined together as shown in the figure.
Pump casing 12 on the motor side formed separately
is the pump casing 1 as shown in Figures 1 and 2.
A pump chamber A in which an impeller 5 is rotatably housed is recessed at a position slightly offset from the center of the pump chamber 2, and a pump discharge port 13 is opened on the side thereof. An opening 27 is recessed in the end face of the partition wall 26 between the pump chamber A and the pump discharge port 13, and is attached to the partition wall 24 of the pump casing 22 on the pump side, which will be described later, as shown in FIG. The tip of the reinforced reinforcing material 25 can be inserted and joined. And pump discharge port 1
Around part 3, a reinforcing plate 15 made of a steel plate of a predetermined thickness, such as stainless steel, with a slightly larger cutout hole 14 in accordance with the shape of the pump outlet as shown in FIG. As shown in the figure, it is internally installed somewhat close to the motor side, and the pump discharge port 13 of the pump casing 12 is reinforced so that it can be sufficiently joined to the end surface of the cast iron intermediate casing 16 of the discharge section 11. . Reference numeral 17 denotes a sealing part integrally protruding in the shape of an O-ring, which does not press against the end face of the intermediate casing 16 as shown in Fig. 1, but fits into the sealing groove 18 as shown in the figure for sealing. . 19 is a hole for fixing the pump casing;
As shown in the figure, the casing cover 20 on the pump side and the cover body 7, which also serves as a strainer, are pressed against and fixed to the intermediate casing 16 with a fastener 21 such as a long bolt.

On the other hand, the pump casing 22 on the pump side is formed into a cylindrical shape with a slightly deeply recessed center part as shown in FIG. The central portion provided with the opening 8 is formed into a U-shaped cross section, and is engaged with the protruding portion 23 of the casing cover 20 as shown in the figure and fixed with an adhesive (not shown) or the like. A side circumferential portion of the pump chamber B, which is recessed and slightly offset from the center of the pump casing 22, is provided on the outer periphery of the impeller 5, facing the partition wall portion 26 of the pump casing 12 on the motor side. As shown in the figure, a peninsula-like partition wall portion 24 is integrally provided projecting from the side circumferential portion. In the pump casing 22 on the pump side, the peninsula-shaped partition wall 24 partitions the pump chamber B side and the pump discharge port 10 side by 70 to 80%, and the impeller 5 is separated between the pump chambers A and B. is rotated to increase the pressure of waste water and the like sucked in from the suction port 8 and discharged to the pump discharge port 10 on the outside of the partition wall portion 24. The partition wall 24 is reinforced with a metal reinforcing material 25 such as a narrow arc-shaped steel plate at its tip. Reinforcement material 25
is an opening that extends through the pump casing 22 from the casing cover 20 side as shown in FIG. 27, so that the distal end thereof is brought into contact with the reinforcing plate 15, and the reinforcing plate 15 is fitted and mounted. The end of the reinforcing material 25 on the casing cover 20 side is bent, and this bent part 28 is fixed to the casing cover 20 with adhesive, welding, or other fixing means to firmly support the partition wall 24. That's what I do. Reference numeral 29 denotes a pump casing curing opening into which a heating rod (not shown) heated during rubber vulcanization is inserted so that the rubber material to be filled can be cured in as short a time as possible.

Function: When the pump 1 is used to drain water from a pit, etc., the wastewater containing gravel, etc., is passed through the cover body 7 which also serves as a strainer to the pump casing 9.
Since the pump casing 9 is made of rubber material, even if it is sucked in from the suction port 8 of the pump and discharged to the pump discharge port 10, it will not wear out unlike cast iron.
In addition, even if pressure is applied to the pump discharge port 10, since the reinforcing plate 15 is installed around the pump discharge port 13 of the pump casing 12, the joint part of the drainage part 11 with the cast iron intermediate casing 16 will be affected by the discharge pressure. This prevents water from leaking without opening. In addition, the partition wall portion 24 of the pump discharge port 10,
Even if pressurized water hits the partition wall 26 repeatedly, since the partition wall portion is reinforced with the metal reinforcing material 25, it can be prevented from being bent and damaged, thereby increasing durability.

In particular, the reinforcing material is inserted into the partition wall of the divided pump casing from the casing cover, passing through the pump casing on the pump side, and fitting into the pump casing on the motor side, and also in contact with the reinforcing plate. The casing can be firmly joined to the intermediate casing and maintained. Furthermore, since the reinforcing material is arc-shaped and fixed to the casing cover with bent ends, the rigidity of the reinforcing material itself is increased, and the durability of the partition wall portion can be further enhanced.

In the above embodiment, the pump casing is made of rubber, but it can also be made of wear-resistant soft synthetic resin such as nylon, polyurethane, or urethane, and the reinforcing material and reinforcing plate are not limited to metal materials. It can also be made of resin material, glass fiber, or the like.

Note that although a submersible pump has been described as a pump, the present invention is not limited to submersible pumps.

Effects of the invention As described above, in this invention, although the pump casing made of rubber or synthetic resin is divided into the motor side and the pump side, which is intended to prevent wear caused by gravel contained in wastewater, etc. Even if pressure builds up at the pump outlet on the side of the pump chamber, the annular reinforcing material built around the pump outlet can prevent the pump outlet from being bent and damaged. Because the reinforcing material is internally reinforced, the pump discharge port can be kept reinforced without being worn out. Furthermore, the partition reinforcing material can prevent the peninsula-like protruding partition wall portion on the pump side, which has low durability, from being bent and damaged by the impact of the pump's pressure water, thereby increasing durability. Then, the protruding tip of the partition reinforcing material of the partition wall of the pump side was inserted into the opening of the partition wall of the pump casing of the motor side to join the pump casings of the pump side and the motor side. This prevents the joints at the pump discharge port from bending and deforming, allowing them to be firmly joined, preventing water from leaking between them and the intermediate casing, and maintaining good pump performance. It is possible.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted side sectional view of an embodiment of the present invention, Fig. 2 is a plan view of the pump casing part on the motor side of the above, Fig. 3 is a plan view of the reinforcing plate of the above;
FIG. 4 is a plan view of the pump casing section on the same pump side as above. DESCRIPTION OF SYMBOLS 1... Pump, 3... Motor part, 4... Pump part, 7... Cover body, 9, 12, 22... Pump casing, 10... Pump discharge port, 15... Reinforcement plate, 16... Intermediate Casing, 25...Reinforcement material.

Claims (1)

[Scope of Claim for Utility Model Registration] A pump casing made of rubber or soft synthetic resin is divided into a motor side and a pump side, and a partition wall is provided on the side of the pump chamber to arrange the pump discharge port. In pumps such as drainage pumps that have been installed, an annular reinforcing material is placed inside the cylindrical pump discharge port on the side of the pump chamber of the pump casing on the divided motor side, and an annular reinforcing material is installed around this pump discharge port. A partition reinforcing material is installed inside the peninsula-shaped partition wall of the partition between the pump chamber of the pump casing on the pump side and the pump discharge port, and the partition wall partitions the pump chamber of the pump casing on the motor side and the pump discharge port. An opening is recessed in the end face of the pump casing, and the tip of the partition reinforcing material of the partition wall of the pump casing on the pump side protrudes toward the motor side. A pump with reinforced pump casing, characterized in that the protruding tip of the wall partition reinforcement is inserted to join the pump casings on the pump side and the motor side.