JP2007315216A - Pump device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact, lightweight, and reduced cost pump device. <P>SOLUTION: A water/steam separating chamber is formed of two chambers comprising a suction chamber and a discharge chamber. A suction flange connectable to the suction pipe is directly coupled to the suction chamber. A water supply pipe connection screw connectable to the discharge pipe is formed in the discharge chamber. A priming port for introducing priming required for self-priming operation is formed in the upper part of the suction chamber. A check valve for preventing reverse flow is installed swingably so as to be held by the suction chamber and the suction flange. An annular valve seat is formed on the outflow end side of the suction flange at a portion where an annular groove is brought into contact with the valve element of the check valve so that the check valve can be installed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a small, lightweight and inexpensive pump device.

  FIG. 5 shows a conventional pump device provided with an air / water separation chamber for separating air and water during the self-priming operation. The steam-water separation chamber is composed of a suction chamber and a discharge chamber, and the upper portion of the suction chamber is opened, and a check valve can be attached from this open portion. A check valve cover is attached to the open part and sealed with an O-ring. The check valve cover is provided with a check valve guide, and the check valve guide guides the check valve so as to move only in the vertical direction.

  The lower end of the check valve mounting portion of the suction chamber extends in a pipe shape to form a water passage, and is connected to a suction joint screwed with a suction flange connectable to the suction pipe.

  In the upper part of the discharge chamber, there is provided a priming port for containing priming water necessary for the self-priming operation, and the priming port is closed with a priming cap.

  A discharge pipe for constituting a water passage is connected to the lower end of the discharge chamber, and the discharge pipe is connected to a discharge joint screwed with a discharge flange connectable to the discharge pipe.

  An example of such a pump device is disclosed in Japanese Patent Application Laid-Open No. 9-317680 (Patent Document 1).

JP 9-317680 A

  The conventional pump device has a complicated water passage from the suction flange to the suction chamber of the steam separation chamber and a water passage from the discharge chamber of the steam separation chamber to the discharge flange. The number of parts has increased because of the configuration. In addition, since the check valve is mounted in the suction chamber of the steam / water separation chamber, the upper portion of the suction chamber needs to be opened, and the opening portion is closed with a check valve cover after the check valve is mounted.

  That is, due to the above-described complicated structure, the parts cost and the manufacturing cost are increased, resulting in an expensive pump device.

  Furthermore, since the number of parts is large, the pump device itself is large and heavy, and handling and installation are poor.

  In order to solve the above problems, the present invention comprises a gas / water separation chamber comprising two chambers, a suction chamber and a discharge chamber, and a suction flange that can be connected to a suction pipe is directly attached to the suction chamber. Discharge pipe connection screw that can be connected to the pipe was provided.

  In addition, a priming port was provided in the upper part of the suction chamber for containing priming water necessary for self-priming operation.

  In addition, a check valve for preventing backflow that can be swung so as to be sandwiched between the suction chamber and the suction flange is provided, and a circumferential groove is provided on the outflow end side of the suction flange so that the check valve can be mounted. An annular valve seat was provided at the part where the valve body of the check valve contacts.

  According to the present invention, compared with the conventional pump device, the water passage from the suction flange to the discharge side through the air / water separation chamber can be simplified, so the number of parts can be greatly reduced, and an inexpensive pump device can be obtained. Can be provided.

  Further, since the suction flange is directly attached to the suction chamber of the steam separation chamber and the discharge chamber is provided with a discharge pipe connection screw that also serves as the discharge flange, the pump device can be reduced in size and weight.

  Embodiments of the present invention will be described below with reference to the drawings of the embodiments of the present invention.

  In order to make the embodiments of the present invention easier to understand, a conventional pump device will be compared and described.

  1 to 4 show the present invention, and FIGS. 5 and 6 show a conventional example.

  First, a conventional pump device will be described with reference to FIGS.

  The pump device includes a pump unit 50 that pumps well water and the like, pressurizes the pumped water, and supplies the water, and a motor 70 for rotating the pump unit 50, and a drive for driving the motor 70 on the upper side of the motor 70. The device 80 is mounted.

  The pump unit 50 includes an impeller 51, a casing 52 in which the impeller 51 is placed, and a casing cover 53 that closes the front surface of the casing 52.

  An air / water separation chamber 54 is provided in the upper part of the pump unit 50. The steam / water separation chamber 54 includes a suction chamber 54 (a) and a discharge chamber 54 (b), and is fixed to the pump unit 50 with screws or the like.

  The suction chamber 54 (a) is provided with a check valve 55. The check valve 55 can be mounted from the upper open portion of the suction chamber 54 (a), and after mounting, the check valve cover 56 is mounted on the upper open portion of the suction chamber 54 (a) with an O-ring interposed. Is sealed with water.

  The check valve cover 56 is provided with a check valve guide 56 (a), and the check valve guide 56 (a) guides the check valve 55 to move only in the vertical direction.

  The lower end of the check valve 55 mounting portion of the suction chamber 54 (a) extends in a pipe shape to form a water passage, and is connected to a suction joint 58 screwed with a suction flange 57 that can be connected to the suction pipe. .

  A priming cap 59 is provided in the upper part of the discharge chamber 54 (b). Remove the priming cap 59 and add priming water.

  A discharge pipe 60 for forming a water passage is connected to the lower end of the discharge chamber 54 (b), and the discharge pipe 60 is connected to a discharge joint 62 screwed with a discharge flange 61 that can be connected to the discharge pipe.

  The problems with the conventional pump device are that the water passage extends from the suction flange 57 to the suction chamber 54 (a) of the steam / water separation chamber 54, and the discharge flange 54 (b) of the steam / water separation chamber 54. Since the water passage leading to 61 is complicated, the number of parts is increased in order to form the water passage.

  In addition, since the check valve 55 is mounted in the suction chamber 54 (a) of the steam / water separation chamber 54, the upper portion of the suction chamber 54 (a) needs to be opened, and the check valve cover 56 is installed after the check valve 55 is mounted. It was a complicated structure that closed the opening.

  That is, due to the above-described complicated structure, the parts cost and the manufacturing cost are increased, resulting in an expensive pump device.

  Furthermore, since the number of parts is large, the pump device itself is large and heavy, and handling and installation are poor.

  The present invention has been made in view of the above-described problems of the conventional pump device, and an object thereof is to thoroughly reduce the number of parts.

  The pump device of the present invention will be described with reference to FIGS.

  The pump device of the present invention comprises a pump unit 1 and a motor 2 for rotating the pump unit 1 in the same manner as a conventional pump device, and a drive device 3 for driving the motor 2 is mounted on the motor 2. ing.

  The pump unit 1 includes an impeller 2, a casing 3 in which the impeller 2 is placed, and a casing cover 4 that closes the front surface of the casing 3.

  An air / water separation chamber 5 is provided at the top of the pump unit 1. The steam / water separation chamber 5 includes a suction chamber 5 (a) and a discharge chamber 5 (b), and is fixed to the pump unit 1 with screws or the like.

  The configuration so far is not so different from the conventional pump device.

  A feature of the present invention is that a suction flange 6 that can be connected to a suction pipe is directly attached to the suction chamber 5 (a).

  The discharge chamber 5 (b) is provided with a discharge pipe connection screw 5 (c) that can be connected to a discharge pipe that also serves as a conventional discharge flange.

  Further, in order to reduce the size of the air / water separation chamber 5, the priming cap 8 provided in the upper portion of the discharge chamber in the conventional pump device is provided in the upper portion of the suction chamber 5 (a).

  In order to further reduce the size of the pump device, a swingable check valve 7 for preventing backflow of pumped water is provided between the suction chamber 5 (a) and the suction flange 6.

  The structure for holding the check valve 7 between the suction chamber 5 (a) and the suction flange 6 will be described with reference to the structural view of the check valve 7 in FIG. 3 and the structural view of the suction flange 6 in FIG.

  The check valve 7 includes a valve body 7 (a) and a valve ring 7 (b). The suction flange 6 is provided with a circumferential groove 6 (a) so that the check valve 7 can be mounted, and the valve ring 7 (b) of the check valve 7 is mounted in the groove 6 (a). Is done.

  The suction flange 6 is provided with an annular valve seat 6 (b) at a portion of the check valve 7 that contacts the valve body 7 (a).

  With this structure, when the pump is stopped, the valve 7 (a) of the check valve 7 is pressed against the valve seat 6 (b) of the suction flange 6 by the pressure on the discharge side, thereby preventing the backflow of pumped water. Become.

  As described above, the features of the present invention have been described. However, according to the present invention, the water passage from the suction flange to the discharge side through the air / water separation chamber can be simplified compared to the conventional pump device, so the number of parts can be greatly increased. It is possible to provide an inexpensive pump device that can be reduced.

  Further, since the suction flange is directly attached to the suction chamber of the steam separation chamber and the discharge chamber is provided with a discharge pipe connection screw that also serves as the discharge flange, the pump device can be reduced in size and weight.

1 is a longitudinal sectional view of a pump device according to an embodiment of the present invention. It is a left view of FIG. It is the front view and right view of a check valve. It is the front view and left view of a suction flange. It is a longitudinal cross-sectional view of the pump apparatus of a conventional example. FIG. 6 is a right side view of FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Pump part, 5 ... Gas-water separation chamber, 5 (a) ... Suction chamber, 5 (b) ... Discharge chamber, 5 (c) ... Discharge pipe connection screw, 6 ... Suction flange, 7 ... Check valve.

Claims (4)

  A pump part that rotates the impeller provided in the casing to rotate the impeller and performs a pumping action, and an air / water separation chamber that is disposed above the pump part and separates air and water during self-priming operation The air / water separation chamber has two chambers, a suction chamber and a discharge chamber, and a suction flange that can be connected to a suction pipe is directly attached to the suction chamber, and a discharge pipe can be connected to the discharge chamber. A pump device comprising a discharge pipe connection screw. The pump device according to claim 1, wherein
A pump device characterized in that a priming port is provided at the upper part of the suction chamber for priming water necessary for self-priming operation. The pump device according to claim 1 and 2,
A pump apparatus comprising a check valve for preventing backflow that can swing so as to be sandwiched between the suction chamber and the suction flange. The pump device according to claim 1,
On the outflow end side of the suction flange, a circumferential groove is provided so that a check valve can be mounted, and an annular valve seat is provided at a portion where the check valve body contacts. A pump device characterized by.

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