JP2006077734A - Downcast valve for submerged pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a downcast valve for a submerged pump, capable of easily discharging water in delivery port piping connected to a delivery port outward. <P>SOLUTION: A valve body 5 of a cylindrical form as a whole, having a passage F inside, is provided to be connected to the delivery piping 3. A valve chest 7 housing a valve element 8 is provided to communicate with the passage F through a communication hole 6 at a side part B5 of the valve body 5. A hollow valve cap 10 having a hollow part 16 is provided, having a valve seat 9 for the valve element 8. A hook 12 connected to a rope R extended to the ground GL is provided at the side part B5 of the valve body 5. A pin that can be engaged with the valve element 8 through the hollow part 16 is provided under the hook 12 integrally with the hook 12. An elastic member 13 is provided to constantly pull the hook 12 downward. A protective cover 14 is provided to retain the hook 12 at the side part B5 of the valve body 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a precipitation valve for a submersible pump, which is provided at a discharge port of a submersible pump installed in an elongated well and drains water inside a discharge pipe connected to the discharge port to the outside. Is.

In a conventional submersible pump for a well, a submersible pump is inserted into the well, and a discharge pipe is connected to the well and is extended to the ground to pump well water.
In such a water supply system using a submersible pump, a check valve is installed at the discharge port of the submersible pump in order to prevent the backflow of water in the discharge port piping when the pump is stopped.

However, when lifting the submersible pump to the ground for the purpose of maintenance of the submersible pump, there is a check valve, so the discharge pipe remains filled with water, and the weight is excessive, so the lifting work It becomes difficult.
In addition, it may be necessary to drain the water in the discharge pipe for the purpose of preventing freezing.

  For this reason, a precipitation valve is provided downstream of the check valve of the pump discharge port so that the water in the discharge port piping can be drained outside the tube by an operation from the ground. The conventional precipitation valve is of a type in which a valve body is pressed against a valve seat and sealed by a special spring.

This type of precipitation valve is a shape that attaches the valve structure to the pipe, and is inserted into a thin well pipe so that it falls within the range of the concentric cylinder with the outer diameter of the submersible pump. While it is desired to have the same diameter as the discharge port, it becomes a protrusion to the outside of the pipe, which hinders the work of inserting the discharge pipe into the well.
Also, the piping and the valve part were connected by a simple hole, and the valve body was likely to become inoperable due to the inflow, retention and accumulation of foreign matters such as sand.

  In addition, the valve body needs to have a special shape for miniaturization, and the seating surface on the valve seat is difficult to manufacture due to the need to increase the processing accuracy due to the sealing surface.

The present applicant has proposed a check valve for a submersible motor that enables continuous rotation of a rotating part during assembly of a pump and prevents assembly failure (Patent Document 1).
The above proposal is provided with an opening through which a tool for manually rotating the rotating body is provided in the central part of the check valve body, and does not solve the various problems described above.

Other conventional techniques exist (for example, Patent Document 2), but they do not affect the operation of the check valve, and cannot be a solution to the above problem.
Japanese Patent Application No. 2003-214376 Japanese Patent Application No. 2004-116335

  The present invention has been proposed in view of the above-described conventional problems, and is provided in the discharge port of a submersible pump installed in an elongated well, and the inside of the discharge port pipe connected to the discharge port. The purpose is to provide a precipitation valve for submersible pumps that easily drains the water to the outside.

The precipitation valve for submersible pumps of the present invention is provided at the discharge port (2) of the submersible pump (1) installed in the elongated well (W), and is connected to the discharge port (2). In the submersible pump precipitation valve (4) for draining the water inside the pipe (3) to the outside, one end is connected to the discharge port (2) side of the submersible pump (1) and the other end is a discharge pipe. (3) is connected to (3) and has a flow path (F) inside and has a generally cylindrical valve body (5), and the flow path (F) is connected to the side (B5) of the valve body (5). A valve chamber (7) is provided which communicates via the communication hole (6) and accommodates the valve body (8), has a valve seat (9) of the valve body (8) and has a hollow portion (16). A hollow valve lid (10) is provided, and a hook (12) connected to a rope (R) extending to the ground (GL) is connected to the side portion of the valve body (5). B5), a pin (11) that can be engaged with the valve body (8) through the hollow portion (16) of the hollow valve lid (10) at the lower portion of the hook (12) is connected to the hook (12). A protective cover (14) which is provided integrally and includes an elastic member (13) which always pulls the hook (12) downward, and holds the hook (12) on the side (B5) of the valve body (5). (Claim 1).
In specific implementation, the integration of the pin 11 into the hook 12 may be a welding connection or a screw connection. The elastic member 13 is preferably a coil spring.

The valve body (8) is preferably a sphere made of an elastic material (Claim 2).
In specific implementation, the valve body is preferably a rubber ball.

The valve body (5) is provided with an upper flow path (Fa) having the same inner diameter as the discharge pipe (3) in the upper part of the flow path (F), and in the lower part of the flow path (F). A lower flow path (Fb) having the same inner diameter as the opening (2) is provided, and the upper flow path (Fa) and the lower flow path (Fb) are formed concentrically, and the upper flow path (Fa) and the lower flow path (Fb). It is preferable that the valve chamber (7) is provided in a direction opposite to the eccentric direction of the axis of the flow path (F) with respect to the axis of ().
In specific implementation, the protruding direction of the valve chamber 7 into the flow path F and the eccentric direction of the axial center of the flow path F may be set in the same direction.

It is preferable that the communication hole (6) is provided vertically from the uppermost part of the valve chamber (7) to the valve seat surface (9) of the valve lid (10).
In concrete implementation, the communication hole 6 in the above is formed in a slit shape in a vertically long manner to increase the communication area, and it is necessary to have a slit width in which the valve body 8 does not transfer from the valve chamber 7 to the flow path F. .

It is preferable that the connection between the submersible pump precipitation valve (4) and the discharge port (2) of the submersible pump (1) can be screwed and connected at any position in the rotational direction (Claim 5).
In the above, the rotation direction refers to the rotation direction around the axis of the discharge pipe. In concrete implementation, it is necessary to prevent the connection position from being shifted by the operation of the submersible pump after the screw connection.

The effects of the present invention are as follows.
(A) A valve valve chamber having a valve body communicated with the flow path through a communication hole on the side of the valve body and having a hollow portion provided with a valve seat of the valve body is provided. A hook connected to a rope extending to the ground is provided on a side portion of the valve body, and a pin that can be engaged with the valve body through the hollow portion of the hollow valve lid is provided integrally with the hook at a lower portion of the hook. (Claim 1) Therefore, in order to drain the water inside the outlet pipe to the outside during maintenance of the submersible pump or to prevent freezing, the rope is pulled up from the ground and the valve body with the pin of the hook There is an advantage that it is possible to surely and easily drain the water from the valve seat.

  (B) Since an elastic member that always pulls the hook downward is provided (Claim 1), the hook pin floats the valve body due to vibration caused by the operation of the submersible pump, the pulsation of the discharge water, etc., and the discharge pipe. There is an advantage that the water inside is not drained to the outside.

  (C) Since the protective cover for holding the hook integrally provided with the pin on the side of the valve body is provided (Claim 1), the hook is securely held by the valve body and the function of the precipitation valve is maintained. There are advantages.

  (D) If the valve body is a sphere made of an elastic material (Claim 2), the processing including the valve seat is easy, and there is an advantage that a good valve secret function can be obtained even without precise accuracy. Further, there is an advantage that the structure is simple and easy to assemble.

  (E) In the valve body, the valve chamber 7 is provided in a direction opposite to the eccentric direction of the axis of the flow path F with respect to the axis of the upper flow path Fa and the lower flow path Fb. 3) There is an advantage that the submersible pump precipitation valve discharges to the outside and does not interfere with the insertion of the well pump into the well.

  (F) If the axis of the flow path (F) is decentered with respect to the axis of the upper flow path and the lower flow path (Claim 3), the outer diameter of the pump precipitation valve is discharged. In addition, there is an advantage that the flow path loss does not occur by making the outer diameter of the discharge pipe and the flow path area the same.

(G) If the communication hole is provided vertically from the uppermost part of the valve chamber to the valve seat surface of the valve lid (Claim 4), the valve body in the valve chamber does not transfer into the flow path F, and the communication area There is an advantage that can be taken greatly.
Further, there is an advantage that water can always flow in the valve chamber, and the valve does not operate due to accumulation of sand or the like.

  (H) The connection between the submersible pump precipitation valve and the outlet of the submersible pump can be screwed and connected at any position in the rotational direction (Claim 5). The hook position and the position of the rope on the ground connected to the hook can be set in any direction, and there is an advantage that the rope can be easily pulled up.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a conceptual diagram of a well in which a precipitation valve 4 for a submersible pump according to the present invention is installed.

  A discharge pipe 3 is suspended from the ground GL in an elongated well W excavated from the ground GL to the underground, and the discharge side of the submersible valve 4 for the submersible pump of the present invention is connected to the lower end of the discharge pipe 3. It is attached.

The suction side of the submersible pump precipitation valve 4 is attached to a discharge port 2 at the upper end of the submersible pump 1.
A well water suction port 1 s is provided at the lower end of the submersible pump 1, and a motor M that drives the submersible pump 1 is attached to a lower portion of the suction port 2.
Reference numeral WL indicates a water level, and reference numerals S below the water level WL and below the motor M indicate strainers, respectively.

  FIG. 2 is a perspective view of the submersible pump precipitation valve 4. A hook 12 is held by a protective cover 14 so as to be slidable in the vertical direction on a side B5 of the valve body 5 which is formed in a generally cylindrical shape. Has been.

  Referring to FIG. 3 which is a top view of FIG. 2 and its local enlarged view 4, the outer side surface which is concave on the upper channel Fa side is located between the outer side surfaces 5e and 5e which are slightly inclined and symmetrical on the side portion B5. 5f is formed, and the hook 12 is loosely fitted on the outer surface 5f.

A T-shaped protective cover 14 having a wide upper portion is disposed so as to wrap the hook 12 from the outside so as to be movable up and down, perpendicular to the paper surface in the drawing. The upper part of the protective cover 14 is fixed to the upper side surfaces 5 d of the valve body 5 by four machine screws 15, and the lower part is fixed to the lower end 5 h of the valve body 5 by two machine screws 15.
In FIG. 3, reference numeral Fa is a flow path in the upper part of the valve body 5, and reference numeral 5 c is a projecting portion for interiorizing the valve chamber 7 and the valve lid 10.

FIG. 5 is a single view of the hook 12.
The first straight line portion 12a that is horizontal at the top, the short second straight line portions 12b and 12b that are connected to both ends thereof, and the horizontal lines that are connected to the respective end portions of the second straight line portions 12b and 12b. Third straight line portions 12c, 12c, vertical fourth straight line portions 12d, 12d connected to respective end portions of third straight line portions 12c, 12c, and fourth straight line portions 12d, 12d, respectively. A large frame is formed with the fourth straight line portion 12e that horizontally connects the end portions, and each connection portion is connected with a small radius curve portion.

  And the pin 11 which protrudes by providing the top part 11a above the center part of the 4th linear part 12e is integrally provided by welding in this example.

Further, in this example, a U-shaped frame 12g having an open upper portion protruding downward is integrally provided at the center of the fourth linear portion 12e by welding.
A hook portion 13a of the elastic member 13 indicated by a dotted line is formed to engage with the lower portion of the frame 12g.

FIG. 6 shows a cross-sectional view of the submersible pump precipitation valve 4.
The valve body 5 is formed in a cylindrical shape as a whole, and an upper part is screwed to the discharge port pipe 3 and a lower part is screwed to the discharge port 2 of the submersible pump 1.

  The upper flow path Fa in the vicinity of the connection portion between the upper portion of the valve body 5 and the discharge port pipe 3 is formed concentrically with the discharge port piping 3 and has substantially the same area, and the lower portion in the vicinity of the connection portion with the discharge port 2. The flow path Fb is concentric with the discharge port 2 and has substantially the same area.

  Further, the upper flow channel Fa and the lower flow channel Fb are formed concentrically, and the upper flow channel Fa and the lower flow channel Fb are connected by a flow channel F whose heart is eccentric to the left in FIG. Has been.

  There is a side portion B5 in the direction opposite to the eccentric direction of the flow path F, and a protrusion 5c is formed on the flow path F side of the side portion B5.

  The protrusion 5c forms a valve chamber 7 and a space portion 5s for storing the function of the precipitation valve together with the side portion B5. FIG. 8 is a view of the space portion 5s as viewed from the outer side X.

  In FIG. 8, reference numeral 7 denotes a valve chamber, and reference numeral 7 s denotes a hollow region provided with an inner screw in which a later-described valve lid 10 is screwed. Reference numeral 18 denotes a pin for fixing one end of the coil spring 13 which is an elastic member.

The configuration of the precipitation valve will be described with reference to FIG. 7 showing the local part A in FIG.
A cylindrical hollow valve chamber 7 is formed above the side portion B5 of the flow path F, and a rubber ball 8 formed of an elastic material as a valve body is stored in the valve chamber 7.

  A cylindrical valve lid 10 having a hollow portion 16 below the valve chamber 7 is screwed to the side portion B5 with an external screw. A valve seat 9, which is a seating portion for the rubber ball 8, is formed in an open shape above the hollow portion 16.

  The valve chamber 7 and the flow path F are communicated with each other through a longitudinal slit 6 that is a communication hole (see FIG. 3). The slit 6 is formed in the vertical direction from the upper end of the valve chamber 7 to the vicinity of the valve seat 9 and with a width that prevents the rubber ball 8 from entering the flow path F.

  The hollow portion 16 of the valve lid 10 is formed in a quadrangular or hexagonal hole so that the lower portion of the hole can be fitted with a square wrench, and the pin 11 of the hook 12 can pass therethrough.

  The inner end of the small plate 18 is fitted into the inner wall of the protrusion 5c horizontally below the space 5s, and the outer end is provided to be fitted into the horizontal groove 14a inside the protective cover 14.

  The lower end of the coil spring 13 that always pulls downward on the upper portion of the small plate 18 is locked in the stop hole 18a (see FIG. 8), and the hook portion 13a at the upper end of the coil spring 13 is formed on the U-shaped frame 12g of the hook 12. It is suspended and locked.

  Then, the upper end portion of the pin 11 of the hook 12 is accommodated in the hollow portion 16 by the coil spring 13, and the top portion 11 a of the pin 11 is installed so as to provide an appropriate gap between the rubber ball 8. .

  A rope R extending to the ground GL is connected to the first straight portion 12a at the upper portion of the hook 12, and the top portion 11a of the pin 11 pushes up the rubber ball 8 from below by a predetermined lifting stroke of the rope R to open the valve. It is supposed to be.

  A line P crossing the central portion of the valve body 5 is a dividing line necessary for processing and assembly. The processing of the valve chamber 7, the processing of the slit 6, the processing of the region 7s provided with the internal screw, and the valve lid 10 This is for screwing into the region 7s. After the assembly is completed, it is configured to be integrated by, for example, screw connection or welding connection. However, it may be made in one piece.

  By the submersible pump precipitation valve 4 having the above-described configuration, the rubber ball is seated on the valve seat 9 by the discharged water pressure when the submersible pump 1 is discharged, thereby serving as a check valve.

  When it is necessary to drain the water in the discharge pipe 3 into the well W, the hook 12 is pulled up from the ground GL by the rope R and the rubber ball 8 is pushed up by the pin 11 to open the valve. The water in the discharge pipe 3 reaches the valve chamber 7 through the slit 6 and can be drained into the well W through the hollow portion 16 and the space portion 5s.

  Accordingly, drainage can be performed for maintenance of the submersible pump 1 and prevention of freezing of water inside the discharge pipe 3. Further, during operation of the submersible pump 1, water in the valve chamber 7 is constantly pulsated through the slit 6 to prevent accumulation of dust due to stagnation.

The figure which shows the example of installation to the deep well of the precipitation valve for submersible pumps of this invention. The whole perspective view of the precipitation valve for submersible pumps of the present invention. FIG. 4 is a top view of FIG. 3. FIG. 4 is a locally enlarged view of FIG. 3. Single figure of hook. A side sectional view of a valve body. FIG. 7 is a detailed view of part A in FIG. 6. X arrow line view of FIG.

Explanation of symbols

F ... Flow path, central flow path Fa ... Upper flow path Fb ... Lower flow path 1 ... Submersible pump 2 ... Discharge port 3 ... Discharge port piping 4 ... Submersible pump Precipitation valve 5 ... valve body 5c ... projection 5s ... space 6 ... communication hole, slit 7 ... valve chamber 8 ... valve, rubber ball 9 ... valve seat 10 · Valve lid 11 · · Pin 12 · · Hook 13 · · Elastic member, coil spring 14 · · Protective cover 16 · · Hollow portion

Claims (5)

A submersible pump for a submersible pump installed at the outlet of a submersible pump installed in an elongated well and draining the water inside the outlet pipe connected to the outlet to the outside. Connected to the discharge port side of the pump, the other end is connected to the discharge port piping, and has a flow path inside and is provided with a generally cylindrical valve body, and the flow passage and the communication hole on the side of the valve body A valve chamber that houses the valve body, has a valve seat for the valve body, and has a hollow valve lid having a hollow portion, and a hook connected to a rope extending to the ground is a valve body A pin that can be engaged with the valve body through the hollow portion of the hollow valve lid is provided integrally with the hook, and an elastic member that always pulls the hook downward is provided at the lower portion of the hook. The hook on the side of the valve body Precipitation valve water pump, wherein a protective cover is provided for. 2. The precipitation valve for submersible pumps according to claim 1, wherein the valve body is a spherical body made of an elastic material. The valve body is provided with an upper flow path having the same inner diameter as that of the discharge pipe and an lower flow path having the same inner diameter as that of the discharge port. The flow path and the lower flow path are formed concentrically, and the valve chamber is provided in a direction opposite to the eccentric direction of the axial center of the flow path with respect to the axial centers of the upper flow path and the lower flow path. The precipitation valve for submersible pumps according to item 1. The submerged pump precipitation valve according to any one of claims 1 to 3, wherein the communication hole is provided vertically from the uppermost part of the valve chamber to the valve seat surface of the valve lid. The submersible valve for submersible pumps according to any one of claims 1 to 4, wherein the submersible pump precipitation valve and a discharge port of the submersible pump are threadedly connected at a position freely in the rotation direction.

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