JP6752690B2 - Pump device and drainage device - Google Patents

Description

The present invention relates to a pump device and a drainage device that detect a water level with a float switch.

Currently, as a means for draining sewage or the like in a sewage tank, a technique using a pump device called a so-called submersible pump installed in water is known. Such a pump device includes a pump in which an impeller is housed in a pump casing having a pump chamber, and a motor for rotating the impeller. In the pump device, the impeller is driven by a motor, so that the impeller rotates in the pump chamber, and the liquid sucked into the pump chamber is boosted and discharged to the secondary side.

In such a pump device, a float switch provided with a float on the cable is used to detect the water level in the sewage tank. The float switch is fixed at a predetermined height position so that the float floats on the water surface at a predetermined water level and the switch in the float can be switched. Therefore, there is known a cable support structure in which a cable of a float switch is sandwiched between a clamp having a groove in which the cable is arranged and a rod to which the clamp is fixed, and the cable is fixed to the rod (see, for example, Patent Document 1). ..

In such a cable support structure, by setting the depth of the groove of the clamp to be smaller than the outer diameter of the cable, the cable is in close contact with the rod, causing a large friction between the cable and the rod, and the position of the cable is displaced. Is configured to be preventable from occurring.

Jikkenhei 7-25282

Since the cable support structure described above has a structure in which the cable is sandwiched and fixed in the groove of the clamp and the gap between the rods, the cable is fixed to the rod in a state where the covering member of the cable is compressed. For this reason, since the conductor wire in the covering member is also fixed in the cable, there is a problem that bending stress is applied to the conductor wire when the float switch moves up and down. In addition, when assembling the float switch and adjusting the water level, the length from the support position of the cable to the float may be fixed to the rod with a length different from the desired length, or the height position of the cable may be incorrect. It is fixed and there is a risk that the float switches will not be installed at the specified intervals.

In such a case, the float switch cannot be switched at the desired water level, and the pump device may malfunction, or when two pump devices are installed and alternate operation is performed, the alternate operation may not be performed normally. is there. Further, if the length from the fixing portion to the float is longer than the desired length, the float may be entangled with other floats or interfere with the pump device, and the float switch may not function.

For this reason, there is a problem that workability is poor, such as the need to measure the support position of the cable and fix it to the rod when installing the float switch.

Therefore, an object of the present invention is to provide a pump device and a drainage device that can easily support a float switch.

In order to solve the above problems and achieve the object, the pump device and the drainage device of the present invention are configured as follows.

As one aspect of the present invention, the pump device includes a seal chamber for accommodating a mechanical seal, a pump having a supply hole for supplying a lubricant to the seal chamber, a motor fixed to the upper portion of the pump, and the motor. An electrical component provided on the upper part of the cable, a cable having one end connected to the electrical component and having a circular cross section, a columnar supported portion provided on the cable, and an axially supported portion of the supported portion. A support having a pair of flanges provided at both ends and having an outer shape larger in the radial direction of the supported portion than the outer diameter of the supported portion, a support having a cable boot provided on one of the flanges, and the support tool. One direction is a float switch having a float provided at the other end of the cable, a plug for closing the supply hole, and a support plug having a clip for supporting the supported portion integrally provided with the plug. A support member having a long rod, a plurality of clips provided on one side of the rod, and a base portion for fixing the rod to the outer surface of the electrical component along the direction of gravity.

As one aspect of the present invention, the drainage device is provided with a pair of pump devices, and one of the pump devices is a float switch fixed to the support plug and three clips provided to the support member. The pump device having the two float switches fixed to both ends, and the other pump device is one said float switch provided adjacent to the one pump device and fixed to the support plug. And the pump device having one float switch fixed to the center of three clips provided on the support member.

According to the present invention, it is possible to provide a drainage device that can easily support a float switch.

The side view which shows the structure of the drainage device which concerns on one Embodiment of this invention in a partial cross section. A side view showing a partial cross-sectional view of the configuration of the pump device used in the drainage device. The side view which shows the structure of the float switch and the support of the cable support structure used in the pump device. The side view which shows the structure of the support member of the cable support structure. Top view showing the structure of the support member.

Hereinafter, the drainage device 100 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 5.
FIG. 1 is a side view showing the configuration of the drainage device 100 according to the embodiment of the present invention in a partial cross section, and FIG. 2 is a side view showing the configuration of the pump device 1 used in the drainage device 100 in a partial cross section. Is a side view showing the configuration of the float switch 14 and the support 51 of the cable support structure 15 used in the pump device 1, FIG. 4 is a side view showing the configuration of the clip 52 and the support member 53 of the cable support structure 15, FIG. It is a top view which shows the structure of the clip 52 and the support member 53.

As shown in FIG. 1, the drainage device 100 is installed in a sewage tank 200 or the like and sends sewage containing foreign matter (dirt or the like). The drainage device 100 includes a pair of pump devices 1 and a drainage pipe 110 connected to the pump device 1 to drain sewage to the secondary side.

As shown in FIGS. 1 and 2, the pump device 1 includes a motor 11, a pump 12 to which the motor 11 is fixed at an upper portion, a seal member 13 provided between the motor 11 and the pump 12, and a plurality of floats. It includes a switch 14, a cable support structure 15 for supporting the float switch 14, and an electrical component 16. The pair of pump devices 1 have different numbers of float switches 14. One pump device 1A is provided with three float switches 14. The other pump device 1B is provided with two float switches 14.

The motor 11 includes a stator and a rotor rotated by the stator in the motor casing, and the rotating shaft 21 is connected to the rotor. The motor 11 is, for example, a permanent magnet motor.

The pump 12 includes a rotating shaft 21, an impeller 22 fixed to the rotating shaft 21, a pump casing 23 for accommodating the impeller 22, and a casing cover 24 for covering the pump casing 23.

The rotating shaft 21 is directly or indirectly connected to the rotor of the motor 11 and is formed so as to be rotatable following the rotation of the rotor. The rotary shaft 21 is rotatably supported by, for example, a motor casing via a bearing such as a bearing.

The impeller 22 is formed so as to be inserted into the pump casing 23, for example. The impeller 22 is formed so that water can be pumped by rotating in the pump casing 23. The impeller 22 is, for example, a semi-open type impeller in which a plurality of blades are provided on a single disk-shaped shroud.

As shown in FIG. 1, the pump casing 23 has a suction port 31 arranged downward with the pump device 1 installed on the installation surface, a discharge port 32 formed on a part of the outer peripheral surface, and a suction port 31. A pump chamber 33 connected to the discharge port 32, and an opening 34 provided at a position facing the motor casing and continuous with the pump chamber 33 are provided. Further, the pump casing 23 is provided with a plurality of legs 37 for installing the pump device 1 on the lower surface thereof.

The suction port 31 is arranged with a predetermined gap from the installation surface of the pump device 1. The discharge port 32 is fluidly connected to, for example, a part of the pump chamber 33 in the radial direction. The discharge port 32 opens with the axial direction of the opening end facing upward. A pipe is connected to the discharge port 32.

The pump chamber 33 is formed so that the impeller 22 can be stored. Further, the pump chamber 33 has an inner peripheral surface capable of forming a volute-shaped flow path capable of guiding the liquid pressurized by the impeller 22 to the discharge port 32.

The opening 34 has an inner diameter that allows the impeller 22 to be inserted into the pump chamber 33. The mounting surface 35 is formed so as to be in contact with the end surface of the casing cover 24.

A plurality of legs 37 are arranged around the suction port 31 at equal intervals. The legs 37 are configured to have a length that allows the suction port 31 to be arranged at a predetermined height from the installation surface of the pump device 1 with the pump device 1 installed on the installation surface.

The casing cover 24 is connected to the pump casing 23 and covers the opening 34 of the pump casing 23. The casing cover 24 is connected to the motor casing. The casing cover 24, together with the motor casing, constitutes the seal chamber 13a. The casing cover 24 has a supply hole 24a for supplying a lubricant to the seal chamber 13a on a part of the outer peripheral surface thereof. The supply hole 24a is provided with a female screw portion on the inner peripheral surface thereof. The height from the lower surface of the leg portion 37 to the supply hole 24a is configured to be slightly lower than that of H1.

The seal member 13 is provided between the motor casing and the casing cover 24, and is configured so that the rotating shaft 21 and the casing cover 24 can be shaft-sealed. The seal member 13 is, for example, a mechanical seal. The seal member 13 is housed in a seal chamber 13a composed of a motor casing and a casing cover 24. The seal chamber 13a is filled with, for example, a lubricant.

As shown in FIG. 1, three float switches 14 are provided in one pump device 1A and two are provided in the other pump device 1B. The float switches 14 provided at the lower positions of both pump devices 1 are installed at the same height H1. The two float switches 14 provided at high positions of one pump device 1A are provided at different heights H2 and H4. One float switch 14 provided at a high position of the other pump device 1A is provided at a height H3 higher than H2 and lower than H4. Here, the distance between the heights H2 and H3 and the distance between the heights H3 and H4 are configured at equal intervals.

That is, the float switch 14 provided below both pump devices 1 is a float switch 14 for stopping each pump device 1. Further, the float switch 14 provided above both pump devices 1 is a float switch 14 for driving each pump device 1.

The float switch 14 is connected to a cable 41, a float 42 provided at one end of the cable 41, a switch provided inside the float switch 14 that can be switched by the inclination angle of the float switch 14, and the other end of the cable 41. It has a connector and. Further, in the float switch 14, a support 51 described later of the cable support structure 15 is integrally fixed at a predetermined position of the cable 41. Here, the predetermined position is a portion supported by the cable support structure 15 and is a position having a predetermined length from the float switch 14.

The cable 41 includes a conductor wire and a covering member that covers the conductor wire. The cross section of the cable 41 is formed in a circular shape. A float 42 is fixed to one end of the cable 41, and a switch is electrically connected to the cable 41. A connector is connected to the other end of the cable 41. The cable 41 is connected to the electrical component 16 via the connector.

As shown in FIGS. 1 to 4, the cable support structure 15 includes a support 51, a clip 52, a support member 53, and a support plug 54. The cable support structure 15 is configured to be able to support the cables 41 of the plurality of float switches 14.

The support 51 is fixed at a predetermined position on the cable 41. The support 51 is provided at both ends of the columnar supported portion 51a and the supported portion 51a in the axial direction, and has an outer shape larger in the radial direction of the supported portion 51a than the outer diameter of the supported portion 51a. It includes a pair of flanges 51b and cable boots 51c provided on one of the flanges 51b. The support 51 is made of a resin material by integrally molding a supported portion 51a, a pair of flanges 51b, and a cable boot 51c. The support 51 is preformed integrally with the cable 41 or integrally fixed to the cable 41. In this case, the support 51 is fixed to the cable 41 by heat shrinkage or by an adhesive, for example.

The flange 51b is formed in a disk shape having an outer diameter larger than the outer diameter of the supported portion 51a. The cable boot 51c is integrally provided with the flange 51b arranged on the float 42 side of the cable 41. The cable boot 51c is configured in a truncated cone shape, for example, protruding from the flange 51b side with a predetermined length. The cable boot 51c is configured to be able to bend while supporting the cable 41 by providing a recess and a hole on the outer peripheral surface thereof.

The clip 52 is configured to be able to support the supported portion 51a. The clip 52 has a radius of curvature so that the supported portion 51a can be arranged inside, and a part of the clip 52 is formed in an arcuate cylinder shape that opens with a width smaller than the outer diameter of the supported portion 51a. The clip 52 is configured such that the axial width of the opening end portion is larger than the axial width of the supported portion 51a. The clip 52 is configured such that the axial width of the portion located between the ends is the same as the axial width of the supported portion 51a.

More specifically, the clip 52 includes an arc-shaped portion 52a that is partially opened and a pair of lips 52b provided at the opening end of the arc-shaped portion 52a. The axial width of the arcuate portion 52a is larger than the axial width of the supported portion 51a. The width of the arcuate portion 52a to be opened is smaller than the outer diameter of the cable 41. For example, the opening width of the arcuate portion 52a is configured to be slightly smaller than the radius of the cable 41.

The lip 52b extends, for example, along the radial direction of the arcuate portion 52a from the opening end of the arcuate portion 52a. The lip 52b is configured such that the axial width of the arcuate portion 52a is larger than the axial width of the supported portion 51a. The pair of lips 52b spread outward from the opening end of the arcuate portion 52a in a direction away from each other.

The support member 53 includes a base 61 fixed to the motor casing or the electrical component 16, and a unidirectionally long rod 62 fixed to the base 61. The support member 53 includes three clips 52 fixed to the rod 62.

The base portion 61 is provided in a direction intersecting the axial direction of the hole portion 61a with the hole portion 61a through which the rod 62 whose axial direction is arranged in the gravitational direction can be inserted when the base portion 61 is fixed to the motor casing or the like. It is provided with a screw hole 61b and a set screw 61c called a so-called enamel set or a set screw screwed into the screw hole 61b. The set screw 61c is configured to be able to fix the rod 62 inserted into the hole 61a by screwing it into the screw hole 61b.

One end side of the rod 62 is fixed to the base portion 61, and three clips 52 are integrally provided on the other end side at equal intervals. Here, the distance between the clips 52 is the same as the distance between H2 and H3 and the distance between H3 and H4, and is set in advance for each drainage device 100.

The three clips 52 provided on the rod 62 are arranged at equal intervals. The rod 62 is fixed to the hole 61a so that the axial direction of the arcuate portion 52a of the clip 52 is along the radial direction of the motor casing, for example. The height of the rod 62 from the base 61 to the clip 52 is adjusted by changing the position where the rod 62 is fixed by the set screw 61c. The rod 62 is a display unit 62a composed of a plurality of memories and lines that indicate the height position of the rod 62 at a portion fixed to the base 61, in other words, guide the position supported by the base 61 on one end side. Has.

The support plug 54 has a male screw portion that can be screwed into the supply hole 24a, and includes a plug 54a that closes the supply hole 24a and a clip 52 that is integrally formed at the end of the plug 54a. In the support plug 54, for example, the clip 52 is integrally arranged with the plug 54a so that the axial direction of the arcuate portion 52a of the clip 52 is along the radial direction of the motor casing. The clip 52 provided on the support plug 54 is provided on the support plug 54 so that when the plug 54a is fixed to the supply hole 24a, the height from the leg portion 37 is the same as that of the H1.

The electrical component 16 includes a cover 71, a control panel 73 arranged in the cover 71, and a power cable 72 connected to the control panel 73 and the motor 11.

The cover 71 has a pair of fixing portions 71a in which one end is closed and the power cable 72 and the cable 41 of the float switch 14 are inserted and fixed. The pair of fixing portions 71a is an upper surface of the cover 71, and includes, for example, an opening provided at a symmetrical position and a support 71b inserted into the opening and supporting the cables 41 and 72 in a liquid-tight manner. There is. The cover 71 is made of, for example, a resin material.

The control panel 73 is configured to be able to drive the motor 11 at a predetermined rotation speed based on the ON / OFF of the float switch 14. For example, in the control panel 73, the float switch 14 located at the third highest height H1 in the height direction of one pump device 1A, in other words, the lowest height H1, is turned on, and the second highest height H2 When the float switch 14 located at the position is turned on, the motor 11 of one of the pump devices 1A can be driven at a predetermined rotation speed.

Further, the control panel 73 rotates the motor 11 of the other pump device 1B at a predetermined rotation speed when both float switches 14 located at the heights H1 and H3 of the other pump device 1B are turned on. It is configured to be driveable.

The control unit 73 is configured to be able to drive the motor 11 of one of the pump devices 1A at a predetermined rotation speed, drain the water by driving the motor 11, and when the float switch 14 located at the height H1 is turned off, the motor 11 is turned off. Stop and stop drainage.

Next, when water flows in, the water level rises, and the float switches located at the heights H1 and H2 of the pump device 1A are turned on, the control unit 73 does not drive the motor 11. In other words, the control panel 73 of the pump device 1A stores the ON / OFF of the float switch located at the height H2, and is configured to be able to drive the motor 11 every other ON / OFF.

Further, the control panel 73 of the other pump device 1B drains water by driving the motor 11 of the pump device 1B when both float switches 14 located at the height H1 and the height H3 are turned on. When the float switch 14 located at the height H1 is turned off, the motor 11 is stopped and the drainage is stopped. In this way, each control unit 73 is configured to be able to alternately operate the pair of pump devices 1A and 1B.

Further, when the inflow amount is larger than the drainage amount while the motor 11 of the pump device 1A is being driven, and the float switch 14 located at the height H3 of the pump device 1B is turned on, the control unit 73 is turned on. , The pump device 1A is driven, and the pair of pump devices 1A and 1B can be operated in parallel.

Similarly, when the inflow amount is larger than the drainage amount while the motor 11 of the pump device 1B is being driven, and the float switch 14 located at the height H4 of the pump device 1A is turned on, the control unit 73 Drives the pump device 1B and is configured to be capable of parallel operation by a pair of pump devices 1A and 1B. For these reasons, it is required that the float switches 14 located at the heights H2, H3, and H4 are arranged so as to have a predetermined height position.

According to the drainage device 100 configured in this way, the rods 62 of the pair of pump devices 1 are fixed to the base 61 at the same height position. Further, the cable 41 of the float switch 14 is supported by providing the support 51 at a predetermined position and fitting the supported portion 51a of the support 51 to the clip 52. Further, the drive float switch 14 is fixed to three clips 52 provided on the rod 62 at predetermined intervals in advance. Furthermore, the two float switches 14 for driving one pump device 1A are fixed to the two clips 52 on both ends of the three clips 52, and one float switch 14 for driving the other pump device 1B is fixed. Is fixed to the central clip 52 of the three clips 52.

Therefore, in the float switch 14 for driving, the cable 14 can be held at a fixed position only by fitting the support 51 provided on the cable 41 into the clips 52 provided on the rods 62 of the respective pump devices 1A and 1B. It is fixed and placed in a predetermined position in the height direction. As a result, the length from the support 51 of the cable 14 to the float 42 becomes constant, and the switch of the float switch 14 can be switched at a constant inclination angle.

Further, when the length is constant, it is possible to prevent the float switch 14 from being entangled with other float switches 14 and being entangled with the motor 11, the pump 12, the electrical component 16, and the like. As a result, it is possible to prevent the float switch 14 from malfunctioning and the float switch 14 from not operating at a predetermined water level, and the drainage device 100 can reliably detect the water level. Further, when the float switch 14 is attached to the motor 11 or the pump 12 via the cable support structure 15, it is not necessary to measure the length from the float 42 to the fixed position, and the float switch 14 has high workability.

Further, the cable support structure 15 is provided with flanges 51b at both ends of the supported portion 51a of the support 51, and the supported portion 51a is inserted through the opening of the arcuate portion 52a of the clip 52, so that the support is provided by the clip 52. The 51 is supported, and the movement of the support 51 in the axial direction is restricted by the flange 51b. Therefore, since the support 51 can be easily supported by the clip 52, the float switch 14 can be easily attached. Therefore, the pump device 1 has good workability.

Further, since the support 51 has the cable boot 51c on the flange 51b on the float 42 side, the bending performance of the cable 41 is improved. That is, even if the float 42 moves up and down due to the displacement of the water level and the cable 41 bends with the support 51 as a fulcrum, the stress generated by the bending is dispersed and the conductor wire in the cable 41 can be prevented from being broken.

Further, the cable support structure 15 is composed of a support 51 integrally provided with the cable 41 and a clip 52 integrally provided with the rod 62 and the plug 54a. Further, the support 51 is fixed by being fitted to the clip 52. Therefore, the number of parts is small and the assembly is easy as compared with the configuration using the conventional clamp.

Further, the clip 52 is configured such that the width of the pair of lips 52b is increased as the pair of lips 52b is separated from the arcuate portion 52a, and the width thereof is wider than the width of the supported portion 51a. Therefore, when the support 51 is fitted to the clip 52, the supported portion 51a is arranged between the pair of lips 52b and pushed in, so that the width between the lips 52b is widened and the supported portion 51a is formed into an arc-shaped portion. It is possible to guide to 52a and has high workability. Further, the water level for driving the pump device 1 can be easily adjusted by simply changing the height of the rod 62 with respect to the base 61, and thus has high workability.

Further, when the support 51 fitted in the arcuate portion 52a moves to the opening side of the clip 52 by an external force or the like, the pair of flanges 51b abut on the lip 52b and the support 51 moves in the direction of coming out of the clip 52. You can regulate that. As a result, after the support 51 is attached to the clip 52, the support 51 can be prevented from coming off from the clip 52, so that the cable 41 can be reliably fixed to the rod 62 or the plug 54a.

Further, the water level for driving the pump device 1 can be easily adjusted by simply changing the height of the rod 62 with respect to the base 61, and the position of the float switch 14 in the height direction can be set to be constant, which is easy. The float switch 14 can be supported.

Further, even if the drainage device 100 includes a pair of pump devices 1 having different numbers of float switches 14, the support 51 can be shared, so that the same parts can be used for the pair of pump devices 1. Therefore, the manufacturing cost can be reduced.

As described above, according to the drainage device 100 according to the embodiment of the present invention, the float switch 14 can be easily supported at a predetermined position.

The present invention is not limited to the above embodiment. For example, in the above-described example, the configuration in which the cable support structure 15 is provided in the pump device 1 has been described, but the present invention is not limited to this. Can support the cable 41. Similarly, the cable support structure 15 is not limited to the cable 41 of the float switch 14, and can support other cables.

Further, the support 51 has been described as having the cable boots 51c on one flange 51b, but the present invention is not limited to this, and the support 51 may be provided with the cable boots 51c on both flanges 51b, respectively.

Further, in the above-described example, the configuration in which the drainage device 100 is arranged in the sewage tank 200 has been described, but the present invention is not limited to this, and the drainage device 100 may be arranged in a sewer or the like, and the drained water is not limited to sewage. Further, in the above-described example, the drainage device 100 has described a configuration in which one pump device 1 is operated according to the water level and a configuration in which both pump devices 1 are operated in parallel. For example, both pump devices 1 are alternately operated. It may be configured to operate in. That is, the drainage device 100 may be configured to operate a pair of pump devices 1 in parallel or alternately.

Further, although the above-described drainage device 100 has been described as having a pair of pump devices 1, the drainage device 100 is not limited to this, and may be configured by one pump device 1. Even when one pump device 1 is used, the support 51 can be shared, so that the manufacturing cost can be reduced. Further, the water level for driving the pump device 1 can be easily adjusted by simply changing the height of the rod 62 with respect to the base 61, and the position of the float switch 14 in the height direction can be set to be constant, which is easy. The float switch 14 can be supported. In addition, various modifications can be carried out without departing from the gist of the present invention.

1 ... Pump device, 11 ... Motor, 12 ... Pump, 13 ... Seal member, 13a ... Seal chamber, 14 ... Float switch, 15 ... Cable support structure, 16 ... Electrical components, 21 ... Rotating shaft, 22 ... Impeller, 23 ... Pump casing, 24 ... Casing cover, 24a ... Supply hole, 31 ... Suction port, 32 ... Discharge port, 33 ... Pump chamber, 34 ... Opening, 35 ... Mounting surface, 37 ... Legs, 41 ... Cable, 42 ... Float, 51 ... Support, 51a ... Supported part, 51b ... Flange, 51c ... Cable boot, 52 ... Clip, 52a ... Arc-shaped part, 52b ... Lip, 53 ... Support member, 54 ... Support plug, 54a ... Plug, 61 ... Base, 61a ... Hole, 61b ... Screw hole, 61c ... Set screw, 62 ... Rod, 71 ... Cover, 71a ... Fixed part, 71b ... Support, 72 ... Power cable, 73 ... Control panel, 100 ... Drainage Equipment, 110 ... drainage pipe, 200 ... sewage tank.

Claims (7)

A seal chamber for accommodating a mechanical seal, and a pump having a supply hole for supplying a lubricant to the seal chamber.
With the motor fixed to the top of the pump
An electrical component provided on the upper part of the motor and
A cable having one end connected to the electrical component and having a circular cross section, provided on the cable, provided on both ends of a columnar supported portion and the supported portion in the axial direction, and the supported portion. A pair of flanges having an outer shape larger in the radial direction of the supported portion than the outer diameter of the support, a support having a cable boot provided on one of the flanges, and a float provided on the other end of the cable. Float switch to be equipped and
A plug that closes the supply hole, and a support plug that has a clip that is integrally provided with the plug and supports the supported portion.
A support member having a rod long in one direction, a plurality of clips provided on one side of the rod, and a base portion for fixing the rod to the outer surface of the electrical component along the direction of gravity.
A pumping device characterized by comprising. The support member has three of the clips.
The pump device according to claim 1, wherein the rod has a display unit on the other side that guides a position supported by the base portion. The clip is characterized in that it has a radius of curvature on which the supported portion can be arranged, and a part thereof is formed in an arcuate cylinder shape that opens with a width smaller than the outer diameter of the supported portion. 2. The pump device according to 2. The clip has lips provided at both ends of the opening.
The width of the lip is larger than the width of the supported portion.
The pump device according to claim 3, wherein the clip is configured such that the width of an arcuate tubular portion continuous between the lips is the same as the width of the supported portion. The pump device according to claim 1, wherein the base portion is configured so that the position where the rod is fixed can be changed. A pair of pump devices are provided,
Claim 2 to claim that one of the pump devices has one float switch fixed to the support plug and two float switches fixed to both ends of three clips provided on the support member. Item 5. The pump device according to any one of Item 5.
The other pump device is provided adjacent to the one pump device and is fixed to the center of one float switch fixed to the support plug and three clips provided to the support member 1. The pump device according to any one of claims 2 to 5, which has one of the float switches.
A drainage device characterized by being equipped with. The pair of pump devices are provided in a sewage tank.
The drainage device according to claim 6, further comprising a control unit that operates the pair of pump devices in parallel or alternately based on the water level in the sewage tank.