JP3676584B2 - Well lid for pump installation - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pump installation well lid used for installation of, for example, a deep well submersible pump.
[0002]
[Prior art]
The installation of the deep well submersible pump is carried out using a well lid that closes the ground opening of the well casing.
Such a well lid has a structure in which a joint pipe that communicates between a well casing side sandwiching the closed portion and the ground side is formed in a closed portion that closes the ground opening of the well casing. Then, insert the deep well submersible pump from the ground opening of the well casing in the order of the pumping pipe connected to the submersible pump, and connect the end of the pumping pipe to the inlet of the joint pipe formed in the well lid, By closing the well casing end with the well lid, the deep well submersible pump is suspended through the pumping pipe.
[0003]
The well lid where the pump is installed has a structure in which an exhaust valve is attached to the joint pipe in order to simplify the water supply equipment using the pressure tank.
This exhaust valve employs a structure that opens and closes the joint pipe by pressure change in the joint pipe. When a check valve is installed at a position away from the outlet of the joint pipe and piped between the pressure tank and the pressure tank, no pressure is applied. Air supply necessary for pumping from the tank can be performed.
[0004]
That is, when the pump stops, the exhaust valve loses the closing force and sucks in the atmosphere. Then, the water in the pumping pipe portion from the check valve to the well water surface falls, and the same portion is filled with air. The exhaust valve then discharges the air up to the well surface to the atmosphere when the pump is started. Next, the exhaust valve is closed by pumping water filled inside, and the inside of the pipe is sealed. Thereby, the air filling the piping part from the exhaust valve to the check valve is pumped into the pressure tank together with the pumped water. That is, air is supplied to the pressure tank every time the pump is started / stopped.
[0005]
Of course, when a check valve is attached directly to the outlet of the joint pipe, there is no air pumping and only normal pumping is performed.
Conventionally, for mounting such an exhaust valve, a pedestal is formed on a part of the joint pipe, a connection port communicating with the inside of the joint pipe is formed on the pedestal, and an exhaust valve (a separate part from the well lid) is formed in this connection port. The attachment port portion formed in the valve) is connected via a joint member such as a nipple.
[0006]
[Problems to be solved by the invention]
By the way, the well lid is desired to be small / lightweight in order to manually cover the ground opening of the well casing. Moreover, it is also desired that the price is low.
However, the structure in which the exhaust valve is fixed to the well lid with the joint member uses the joint member, so that the whole well lid tends to be large and the weight of the well lid is likely to increase. Moreover, since a joint member is required, the well lid tends to be expensive. For this reason, the well lid is required to improve these points.
[0007]
The present invention has been made by paying attention to the above circumstances, and an object of the present invention is to provide a well lid for installing a pump which can be reduced in size / weight and can be reduced in cost.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the well lid for installing a pump according to claim 1 adopts a structure in which a valve chamber is formed in a joint pipe of the well lid body and the valve body is accommodated in the valve chamber. This is because the exhaust valve is integrated.
[0009]
As a result, the well lid is small / lightweight because there is no need for a joint for connecting the parts. Moreover, since the cost burden is reduced (by reducing the number of parts), the product is inexpensive.
[0010]
In addition to the above-mentioned purpose, the well lid for installing a pump according to claim 2 is further provided with a closed portion from the well casing in order to lead the cable from the pump to the ground so that there is no risk of intrusion of rainwater or foreign matter. A cable outlet that leads the cable to the ground is formed, and a cable bush that fills a gap with the cable is attached to the cable outlet.
[0011]
The well lid for installing a pump according to claim 3 is further mounted on the mounting surface mounted on the ground end of the well casing so as to be installed on the well casing having a different diameter only by directly mounting on the ground end of the well casing. A plurality of types of casing guides that can be fitted concentrically with the well casing ends of different diameters are formed around the ends of the joint pipes.
[0012]
The well lid for installing a pump according to claim 4 is formed of a stainless steel material for the well lid body and the exhaust valve so that red water and the malfunction of the exhaust valve due to rust are prevented. The reason is that it has a well lid structure that does not easily generate rust even when used.
[0013]
The well for installing a pump according to claim 5 does not require further processing, and a plurality of measurement / test pipes are connected to the joint pipe so that a flow meter and a test pipe can be attached as necessary. This is because an attachment port is formed.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on a first embodiment shown in FIGS.
FIG. 1 shows a pumping system of, for example, a pressure tank type water supply apparatus to which the present invention is applied. In FIG. 1, 1 is a cylindrical well formed deep in the ground, for example, 2 is an inner wall of the well 1 It is the cylindrical well casing which forms.
[0015]
A pump, for example, a deep well submersible pump 3 (hereinafter simply referred to as a submersible pump 3) is inserted into the well casing 2 from the opening on the ground.
That is, the submersible pump 3 is configured by connecting, for example, an underwater motor 6 that drives each impeller to an end portion of a pump casing 5 in which a plurality of impellers (not shown) are accommodated, and the whole is elongated. It has a cylindrical shape. A pumping pipe 8 extending upward is connected to the discharge port portion 7 formed in the upper part of the casing of the submersible pump 3. The end of the pumping pipe 8 is connected to a well lid 9 placed on the ground end of the well casing 2 so as to close the ground opening, and the submersible pump 3 is suspended in the well 1.
[0016]
The structure around the well lid 9 is shown in FIGS. 2 and 3, and the single structure of the well lid 9 is shown in FIGS.
If the structure of the well lid 9 which is the main part of the present invention is described, reference numeral 10 in FIG. 2 denotes a well lid main body. The well lid body 10 has a closed portion 20 that closes the ground opening of the well casing 2, and a joint pipe 30 that communicates the well casing 2 side sandwiching the closed portion 20 and the ground side.
[0017]
As shown in FIG. 4, the closing portion 20 is formed so that the center protrudes upward in a substantially bowl shape, and a rectangular flange portion 22 is formed around the bowl shape portion 21. There is a disk shape. From the center of the bottom surface of the closing portion 20, a short cylindrical mouth portion 23 having a female screw 23a formed on the inner surface protrudes to form an inlet of a joint pipe 30 to be described later. The end of the water pump 8 is screwed into this inlet, and the submersible pump 3 is suspended.
[0018]
Further, a plurality of cylindrical portions having different diameters, for example, two cylindrical portions 24a and 24b, protrude from the bottom surface portion around the mouth portion 23, concentrically with the mouth portion 23. For example, the inner cylinder part 24 a protrudes to the same height as the mouth part 23, and the outer cylinder part 24 b protrudes to an intermediate height between the cylinder part 24 b and the flange part 22. In addition, between the mouth part 23 and the cylinder part 24a, between the cylinder part 24a and the cylinder part 24b, and between the cylinder part 24b and the flange part 22, the height of the cylinder part 24a, the cylinder part 24b, and the flange part 22, respectively. They are connected by radial rib walls 25a, 25b, 25c. And rib wall 25b, 25c comprises mounting surface 26a, 26b which receives the well casing end of a different diameter, and the edge part of cylindrical part 24a, 24b which protrudes from the mounting surface 26a, 26b becomes a well casing end of a different diameter Fitable casing guides 27a and 27b are formed. Thereby, when the well casing 2 has a small diameter as shown by a solid line in FIG. 2, the well lid 9 is simply placed on the end of the well casing so as to be fitted into the inner casing guide 27a, and the submersible pump 3 It is installed at the end of the well casing so as not to move. When the well casing 2 has a large diameter, as shown by a two-dot chain line in FIG. 2, the well casing 9 is fitted into the outer casing guide 27b, and the well lid 9 is directly placed on the end of the well casing. Installed.
[0019]
Further, as shown in FIGS. 2 to 4, a cable outlet 28 is formed in the closing portion 20, for example, by cutting out from the outer peripheral end of the flange to a part of the bowl-shaped portion 21 in a rectangular shape. From this cable outlet 28, cables, for example, a cable motor cable 3 a from the submersible pump 3, for example, a cable 29 a from a submersible electrode 29 (water level detector) for detecting a water level fixed to the pumping pipe 8 are grounded. Derived. As shown in FIGS. 2 and 3, a cable cable 28a made of rubber, for example, having a split structure, is detachably fitted to the cable outlet 28 so as to detach from the outside (ground). And foreign matter are prevented from entering the well 1. As shown in FIG. 5, the cable bush 28a is formed with a semicircular cutout at the edge of a pair of bush pieces 28b, 28b that are in contact with each other, and is used for inserting a cable between the bush pieces 28b, 28b. A structure in which a through hole 28c is formed and the cables 3a and 29 are sandwiched from the surroundings to be watertight is used.
[0020]
A joint pipe 30 that is integral with the closing portion 20 is formed at the center of the upper surface of the closing portion 20. That is, for example, the joint pipe 30 is an L-shaped pipe part in which a short pipe part 31a rising upward from the upper surface of the closing part 20 and a short pipe part 31b extending laterally from the short pipe part 31b are used. And the edge part of the short tube part 31a is connected with the mouth part 23 currently formed in the bottom face of the obstruction | occlusion part 20 mentioned above. Moreover, the flange 32 which makes a connection part is mounted | worn with the edge part of the short pipe part 31b, and the exit is formed in the edge part of the short pipe part 31b. With this pipe structure, the entire joint pipe 30 that communicates between the well casing 2 side sandwiching the blocking portion 20 and the ground side is constituted.
[0021]
As shown in FIG. 4, a plurality of attachment port portions having different diameters, for example, two, are provided on both sides of the pipe tube 30 of the joint tube 30 as shown in FIG. Mounting opening portions 33a and 33b are formed. In addition, as a connection part, the internal thread of the attachment port parts 33a and 33b is formed with the internal thread. And the pressure gauge 34 which detects the pressure in the joint pipe | tube 30 is attached using the attachment port part 33a of these. 1 shows an example in which the pressure gauge 34 is attached in the vertical direction, and FIG. 2 shows an example in which the pressure gauge 34 is attached in the horizontal direction. Of course, each of the attachment port portions 33a and 33b communicates with the inside of the short pipe portion 31b, and the unused attachment port portion 33b is plugged with the blind plug 35.
[0022]
Further, an exhaust valve 40 is integrally assembled with a part of the joint pipe 30, for example, a part where the short pipe part 31a and the short pipe part 31b intersect.
Referring to the structure of the exhaust valve 40, reference numeral 41 in FIGS. 2 and 4 is a body formed of, for example, a short pipe portion that continuously extends upward from the short pipe portion 31a. The short tube portion 31a side of the body 41 is partitioned by a partition wall 42 having a plurality of through holes 42a formed on the outer peripheral side. The end of the body 41 is covered with a valve lid 44 having a valve hole 43 formed in the center, and a valve chamber 45 is formed inside the body 41 sandwiched between the partition wall 42 and the valve lid 44. . Thereby, the valve chamber 45 integral with the joint pipe 30 is formed. A seal member 46 is interposed between the body 41 and the valve lid 44. For example, a sphere 47 is housed in the valve chamber 45 as a valve body, and the exhaust valve 40 is configured to open and close the joint pipe 30 to the atmosphere according to a pressure change in the joint pipe 30. On the outer surface of the valve lid 44, for example, a mouth portion 48 that opens to the outside and that is open to the atmosphere is formed. A hose 49 connected to a return hole (hole opened to the well) formed in the closed portion 20 is connected to the mouth portion 48 via an L-shaped joint pipe 48a. Is open to the space above the well water surface (open to the atmosphere). With this hose structure, even when pumped water may be led out from the valve hole 43 at the time of starting the pump, it is structured so that it can be returned to the well 1 without getting wet around the well 1. However, 50 shows the hose band which has fixed the hose end to the L-shaped joint pipe 48a.
[0023]
The whole well lid 9 and the whole exhaust valve 40 are made of a stainless material resistant to rust.
Further, the outlet (flange 32) of the well lid 9 is connected to a pressure tank 58 constituting a water supply device via a piping member 55, a check valve 56, and a gate valve 57 (open / close valve) for maintaining a predetermined separation distance. It is connected to the inlet 58a and constitutes a pressure tank type water supply facility. And, by the piping structure using the well lid 9 incorporating the exhaust valve 40 and the piping member 55, the pressure tank 58 can be supplied with necessary air without power.
[0024]
That is, when the submersible pump 3 stops, the valve hole 43 opens and sucks air above the well water surface through the hose 49. Then, the water in the pumping pipe 8 from the check valve 56 to the well water surface falls, and the same part is filled with air. Next, when the submersible pump 3 is started, first, air in the pipe from the well surface to the exhaust valve 40 is discharged to the atmosphere. Subsequently, the sphere 47 is pressed against the valve hole 43 by the pressure of pumping water. That is, the exhaust valve 40 is closed by pumping water filled therein. Thereby, the air in the piping from the exhaust valve 40 to the check valve 56 is pumped into the pressure tank 58 together with the pumped water.
[0025]
The well lid 9 that realizes such non-powered air supply employs a structure in which a valve chamber 45 is formed in the joint pipe 30 and a spherical body 47 (valve body) is accommodated in the valve chamber 45, and the exhaust valve 40 is integrated. Therefore, it is not necessary to secure a nipple for connecting parts, and further, a portion to be connected to the nipple as in the prior art, and a reduction in size / weight can be achieved. In addition, since the cost burden is reduced (by reducing the number of parts), the well lid 9 (product) is inexpensive, and the cable outlet 28 of the well lid 9 has a cable 3a passing through the cable outlet 28. , 29 is attached to the cable bush 28a so that rain water, foreign matter, etc. can enter the well 1 from the gap, and the water quality of the well 1 can be protected. In addition, since the cable bush 28a is structured so as to hold the cables 3a and 29 from around so that there is no gap, the bush 28a also functions as a member for fixing the motor cable 3a and the underwater electrode 29.
[0026]
Moreover, since the well lid 9 is formed with a plurality of types of casing guides 27a and 27b that can be fitted to the well casing ends of different diameters on the mounting surface on the bottom surface, the end of the well casing 2 on the ground can be obtained even without a foundation bolt. The well lid 9 can be easily installed on the well casing 2 having a different diameter by simply placing it directly on the part.
[0027]
The well lid 9 is made of stainless steel for the entire body and the entire exhaust valve 40, so that rust is hardly generated even after many years of use, and the occurrence of red water due to rust and the malfunction of the exhaust valve due to rust humps are prevented. be able to.
[0028]
Since the well lid 9 is formed with a plurality of measurement / test pipe attachment ports 33a and 33b, the pressure gauge, the flow meter and the test pipe are separately subjected to additional processing on the well lid 9. In addition, it can be installed directly in the mounting port 33, and it is easy to install various measuring instruments and test pipes.
[0029]
In addition, although the case where it connected with the water supply apparatus using the pressure tank 58 was mentioned as an example in 1st Embodiment, of course, as shown in 2nd Embodiment shown in FIG. 6, in the water supply apparatus which does not use a pressure tank. It goes without saying that can also be applied.
[0030]
That is, in this embodiment, the check valve 56 and the gate valve 57 are directly connected to the joint pipe 30 of the well lid 9 so that the exhaust valve 40 is not exhibited, that is, air is not sent out. is there. However, in FIG. 6, the same parts as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
[0031]
【The invention's effect】
As described above, according to the first aspect of the present invention, it is possible to provide a well cover for installing a pump which can be reduced in size / weight and cost-effectively.
According to the invention described in claim 2, in addition to the above-described effects, it is possible to prevent rainwater or foreign matter from entering the well from the gap between the cable outlet and the cable passing through the outlet. There is an effect that the quality of water can be protected. In addition, since the cable bush results in holding the cable, there is also an advantage that it can function as a member for fixing the cable.
[0032]
According to the third aspect of the present invention, in addition to the above-described effect, even if there is no foundation bolt, it is easily changed by simply placing the well lid directly on the ground end of the well casing so as to be combined with the casing guide. There is an effect that it can be installed in a well casing having a caliber.
[0033]
According to the invention described in claim 4, in addition to the above effects, the well lid structure is such that rust does not easily occur even after many years of use. Therefore, the generation of red water due to rust and the malfunction of the exhaust valve due to rust humps are prevented. There is an effect that it can be prevented.
[0034]
According to the invention described in claim 5, in addition to the above effects, various flow meters and test pipes can be directly connected to the well lid without performing additional processing on the well lid. The effect is that it is easy to install various measuring devices and test pipes.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a well for installing a pump according to a first embodiment of the present invention together with a state when a submersible pump is installed using the well lid.
FIG. 2 is an enlarged sectional view showing the periphery of the well lid.
FIG. 3 is a plan view of the cable outlet along the line AA in FIG. 2;
FIG. 4 is a view for explaining the structure of each part of the well lid.
FIG. 5 is a plan view of a cable outlet along line B-B in FIG. 2;
FIG. 6 is a cross-sectional view for explaining how to use different well lids according to the second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Well 2 ... Well casing 3 ... Submersible pump for deep wells (pump)
3a ... Motor cable (cable)
20 ... Blocking portions 26a, 26b ... Placement surfaces 27a, 27b ... Casing guide 28 ... Cable outlet 28a ... Cable bush 29 ... Underwater electrode cable 30 ... Joint pipes 33a, 33b ... Mounting port (mounting port)
34 ... Pressure gauge 40 ... Exhaust pipe 41 ... Body 43 ... Valve hole 44 ... Valve lid 45 ... Valve chamber 47 ... Sphere (valve).

Claims (5)

A well lid main body configured to have a closed portion that closes the ground opening of the well casing, and a joint pipe that is formed so as to communicate between the well casing side and the ground side that sandwich the closed portion;
A valve chamber formed integrally with the joint pipe and a valve body housed in the valve chamber, and an exhaust valve that opens and closes the joint pipe to the atmosphere according to a pressure change in the joint pipe. A well lid for installing a pump. The closed portion has a cable outlet for leading a cable from the well casing to the ground, and a cable bush attached to the cable outlet and filling a gap between the cable and the cable outlet. The well lid for installing a pump according to claim 1, wherein The closed portion has a mounting surface that is mounted on the ground end of the well casing, and the mounting surface is concentrically arranged around the end of the joint pipe and can be fitted with a plurality of types of well casing ends having different diameters. A well cover for installing a pump according to claim 1 or 2, wherein a casing guide is formed. 4. The well lid for installing a pump according to claim 1, wherein the well lid body and the exhaust valve are made of a stainless material. 5. The pump installation well lid according to claim 1, wherein a plurality of measurement / test pipe attachment holes are formed in the joint pipe.

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