JP2015116048A - Cable support device and submerged pump device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cable support device capable of preventing cable from interfering with surroundings.SOLUTION: A cable support device 90 comprises: a rod 91 where a housing space, which can house cable 70 in a folding state, is disposed inside the hosing space; and a taking-out hole part 98 disposed in the rod 91, for communicating the inside and the outside of the rod 91, and for inserting the cable 70 through the taking-out hole part 98.

Description

  The present invention provides, for example, a cable support device that supports a cable of a submersible pump device provided with a float switch that controls start and stop according to a change in water level, and controls start and stop according to, for example, a change in water level. The present invention relates to a submersible pump device having a cable support device that supports a cable of a submersible pump device provided with a float switch.

  There has been proposed a submersible pump device having a float switch for controlling starting and stopping according to fluctuations in water level. In such a submersible pump device, a float switch and a controller provided in the pump device are connected by a cable.

  The float switch floats on the water surface and is turned on when the water level reaches a predetermined height. When the float switch is turned on, the signal is transmitted to the controller via the cable. When the controller receives a signal that the float switch has been turned on, the controller starts driving the motor of the submersible pump device.

  In this type of submersible pump device, the position of the cable is fixed by being clamped between a pair of clamping members provided on a rod fixed to the pump unit side. The rod extends in the vertical direction. By adjusting the position of the clamping member with respect to the rod, the water level at which the float switch is turned on can be adjusted (see, for example, Patent Document 1). In order to make it possible to adjust the water level in the on state, a long cable is used in advance.

Japanese Utility Model Publication No. 7-25282

  The above-described submersible pump device in which the cable is fixed to the rod has the following problems. That is, in order to make it possible to adjust the position of the float switch, the portion of the cable that is fixed to the rod tends to be long.

  If the length of the portion of the cable that is fixed to the controller and the rod becomes long, there is a risk that this portion may come into contact with the float switch. Further, if the structure has a plurality of float switches, a plurality of cables are used corresponding to the plurality of float switches. In this case, since the float switches are arranged so as to be aligned with each other in the vertical direction, for example, a cable connected to the float switch arranged relatively upward may come into contact with the float switch arranged below.

  In this way, there is a possibility that a portion that tends to be long, such as a portion used as an adjustment allowance in the cable, interferes with the surroundings. When the cable interferes with the float switch, the float switch becomes difficult to move according to the water level. That is, the float switch may not operate normally.

  Then, an object of this invention is to provide the cable support apparatus which can prevent that a cable interferes with the circumference | surroundings.

  In order to solve the above problems and achieve the object, the cable support device of the present invention is configured as follows.

  A cable support device according to an aspect of the present invention includes: a housing portion in which a housing space that can be housed in a folded state of the cable is provided; and a housing portion that is formed in the housing portion, and communicates inside and outside of the housing portion. And a take-out hole through which the cable passes.

  ADVANTAGE OF THE INVENTION According to this invention, the cable support apparatus which can prevent that a cable interferes with the circumference | surroundings can be provided.

The front view which shows the submersible pump apparatus which has the cable support apparatus which concerns on one Embodiment of this invention, partially cut away. The front view which expands and shows the range F2 shown in FIG.

  A cable support device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing a submersible pump device 10 which is an example of a device having a cable support device 90 of the present embodiment. In FIG. 1, a part of the submersible pump device 10 is shown in a notched state.

  As shown in FIG. 1, the submersible pump device 10 includes a motor (drive unit) 20, a power cable 30, a shaft seal device 40, a pump unit 50, a float switch 60, a cable 70, and a control device (control). Part) 80 and a cable support device 90.

  The motor 20 includes a motor casing 21, a stator 22 accommodated in the motor casing 21, a rotor 23 accommodated in the stator 22, and a rotating shaft 24 fixed to the rotor 23. Yes. The power cable 30 is electrically connected to the external power supply and the motor 20, and is configured to be able to supply power to the motor 20 from the external power supply. The motor casing 21 is formed in a cylindrical shape whose both ends are closed. One end of the motor casing 21 is fixed to a shaft seal device 40 described later.

  The stator 22 is fixed to the inner surface of the motor casing 21. The rotor 23 is accommodated inside the stator. The rotor 23 is formed to be rotatable with respect to the stator 22. The stator 22 is formed so that the rotor 23 can be rotated by electric power supplied via the power cable 30.

  The rotating shaft 24 is fixed to the rotor 23 and is formed so as to be rotatable integrally with the rotor 23. The rotation shaft 24 is disposed on the rotation axis of the rotor 23. The rotary shaft 24 protrudes from one end side of the motor casing 21 and is rotatably supported by the motor casing 21 via a bearing such as a bearing.

  The shaft seal device 40 includes a seal casing 41 and a mechanical seal 42 accommodated in the seal casing 41. The shaft seal device 40 is formed so as to be capable of partitioning the motor 20 and the pump unit 50 to be postoperatively in a liquid-tight manner.

  The seal casing 41 is formed so that a mechanical seal 42 can be accommodated therein, and an oil chamber 43 is provided therein. Further, the seal casing 41 is formed in a cylindrical shape whose both ends are closed, and an insertion hole through which the rotary shaft 24 is inserted is formed on both end surfaces thereof. The oil chamber 43 is formed so as to be filled with lubricating oil for the mechanical seal 42.

  The mechanical seal 42 is formed so as to prevent water from entering the pump unit 50 and lubricating oil from entering the motor 20 by sealing between the seal casing 41 and the rotary shaft 24.

  The pump unit 50 includes a pump casing 51 and an impeller 52 accommodated in the pump casing 51. The pump casing 51 is provided with a pump chamber 57 inside. The pump casing 51 is provided with a support portion 53 that rotatably supports the impeller 52. The support portion 53 is formed with an insertion hole through which the rotation shaft 24 is inserted.

  A plurality of legs 54 for installing the submersible pump device 10 on the installation surface are provided at the lower part of the pump casing 51. A suction opening 55 is formed between the legs 54 in the pump casing 51. A discharge opening 56 is formed on the side surface of the pump casing 51.

  The impeller 52 is integrally fixed to the distal end portion of the rotary shaft 24 and is formed to be rotatable integrally with the rotary shaft 24. The impeller 52 is disposed in the pump chamber 57.

  A pair of float switches 60 is used. One cable 70 is used for each float switch 60. For this reason, in this embodiment, two cables 70 are used. Each float switch 60 is electrically connected to a control device 80 described later by a cable 70. The control device 80 is fixed to the upper end portion of the motor casing 21. For this reason, each cable 70 is taken out from the upper end of the submersible pump device 10 to the outside. The lengths of both cables 70 will be specifically described later.

  Each float switch 60 has the same structure. The float switch 60 is formed so as to float on the liquid surface filled around the place where the submersible pump device 10 is installed. In the present embodiment, the submersible pump device 10 is formed to be able to pump water, and an example of the liquid is water.

  The float switch 60 is configured to change its posture according to the water level and to be in an on state or an off state in accordance with the change in the posture. In other words, the float switch 60 is formed to be in an on state or an off state depending on the water level.

  The cable support device 90 is formed to be able to support both cables 70 on the motor casing 21 side. The cable support device 90 includes a rod (accommodating portion) 91, an attachment hole portion 98, a fixing device 93, a removal prevention portion 94, and an entry prevention portion 95.

  The rod 91 is formed in a cylindrical shape and can be accommodated in a state in which the cable 70 is folded. FIG. 1 shows a state where the cable 70 is accommodated in the rod 91 in a folded state. In the present embodiment, as an example, the rod 91 has a size that can accommodate the overlapping portions even when the three portions of the cable 70 overlap each other by folding the cable 70 twice. ing. Here, in order to make it easy to understand the state where the three portions overlap, reference numerals 71, 72, and 73 are assigned to the three portions, respectively.

  Further, the rod 91 is formed so as to be disassembled into a plurality. In other words, the rod 91 is formed by combining a plurality of members. In the present embodiment, as an example, the rod 91 is formed of two members.

  In the present embodiment, the rod 91 is formed to be disassembled into two parts along a plane passing through the axis of the rod 91. In other words, the rod 91 is formed so that it can be disassembled so that the end surface of the rod 91 is divided into two semicircular portions. One is a first member 96 and the other is a second member 97. The first member 96 and the second member 97 are fixed in a state where the side end surface of the first member 96 and the side end surface of the second member 97 are in contact with each other.

  In FIG. 1, the rod 91 is shown in a state where the second member 97 is cut away from the middle abdomen to the lower end so that the inside of the rod 91 can be seen. In the present embodiment, the portion disposed on the front side of the rod 91 is formed by the second member 97, and the back portion is formed by the first member 96.

  The first member 96 and the second member 97 are detachably fixed by a fixing structure. As an example of this fixing structure, for example, a plurality of protrusions formed on one of the side surfaces of the first member 96 and the second member 97 that are in surface contact with each other, and the protrusions that are formed on the other are fitted together. A plurality of possible recesses. By fitting the protrusions into the recesses, the first member 96 and the second member 97 can be fixed to each other. Furthermore, the first member 96 and the second member 97 can be separated from each other by separating the protrusion from the recess.

  Three or more extraction holes 98 are formed in the rod 91. In this embodiment, six are formed as an example. The plurality of extraction hole portions 98 are arranged along the direction in which the rod 91 extends. The take-out holes 98 are arranged at equal intervals from each other.

  Each extraction hole 98 is formed so that the cable 70 can be inserted therethrough. FIG. 2 shows the range F2 shown in FIG. FIG. 2 shows a state where the second member 97 is removed. As shown in FIG. 2, the take-out hole 98 is formed larger than the cable 70. More specifically, the take-out hole 98 has such a size that the cable 70 can be arranged on the inner side so that the inner peripheral edge 110 does not contact the cable 70.

  In the present embodiment, as an example, the cross-sectional shape of the cable 70 is a circle, and the shape of the extraction hole 98 is also a circle. The inner diameter of the extraction hole 98 is larger than the outer diameter of the cross section of the cable 70.

  In FIG. 2, the cable 70 is in a state of being lowered downward in the extraction hole 98 due to the weight of the float switch 60 and the weight of the cable 70 itself. The state which the part contacts is shown.

  The take-out hole 98 includes a concave first portion 99 formed on the side end surface of the first member 96 and a concave second portion 100 formed on the side end surface of the second member 97. It is formed by combining with each other.

  As shown in FIG. 1, an insertion hole 101 through which the cable 70 can be inserted is formed on the opposite side of the rod 91 with respect to the take-out hole 98 at one end of the rod 91. Two insertion holes 101 are formed. Each insertion hole 101 is arranged along the direction in which the rod 91 extends.

  Each insertion hole 101 is formed larger than the cable 70, and is formed in the same manner as the extraction hole 98, for example. That is, each insertion hole 101 is formed by combining the first portion 99 and the second portion 10 formed in a concave shape on the side end surfaces of the first member 96 and the second member 97, respectively. Has been.

  The fixing device 93 is formed so that the rod 91 can be fixed to the motor casing 21 side. In the present embodiment, as an example, the fixing device 93 fixes the rod 91 to the motor casing (fixed portion) 21 so that the direction extending to the rod 91 is parallel to the vertical direction, and the rod 91 with respect to the motor casing 21. The position of is adjustable in the vertical direction.

  Specifically, the fixing device 93 includes an annular member 102 that is fixed to the motor casing 21 and a bolt 103. In FIG. 1, the annular member 102 is shown as being cut out along a plane passing through its axis. Both ends of the annular member 102 are oriented in the vertical direction, and the rod 91 is formed so that the rod 91 can be inserted therethrough. A screw hole 104 is formed in the annular member 102. The screw hole 104 passes through the annular member 102. The bolt 103 is formed so as to be able to be screwed into the screw hole 104.

  As shown in FIG. 2, the drop prevention part (fixing part) 94 and the entry prevention part (fixing part) 95 are fixed to the cable 70 so as not to move with respect to the cable 70. In the present embodiment, as an example, the disconnection prevention portion 94 and the entry prevention portion 95 are formed integrally with a cover portion 75 that accommodates the metal wire member 76 therein in the cable 70. The cover portion 75 is an insulating member, and is made of resin as an example. The slip prevention part 94 and the entry prevention part 95 are integrally formed when the cover part 75 is formed.

  The disconnection prevention unit 94 is disposed on the control device 80 side with respect to the entry prevention unit 95 along the cable 70. The disconnection prevention portion 94 projects outward in the radial direction with respect to the cable 70, and is formed larger than the extraction hole portion 98. Here, the term “largely formed” means that the cable 70 comes into contact with the edge of the take-out hole 98 when the cable 70 moves in the direction of coming out of the take-out hole 98. In the present embodiment, the omission prevention portion 94 is a circle centered on the axis of the cable 70 as viewed along the cable 70, and the outer diameter thereof is larger than the inner diameter of the extraction hole portion 98.

  The entry preventing unit 95 is disposed on the float switch 60 side with respect to the disconnection preventing unit 94 in the cable 70. The intrusion preventing portion 95 protrudes radially outward with respect to the cable 70 and is formed to be larger than the extraction hole portion 98. Here, the term “largely formed” means that the cable 70 is in contact with the edge of the take-out hole 98 when the cable 70 moves in the direction of entering the rod 91 through the take-out hole 98. In the present embodiment, the entry preventing portion 95 is a circle centered on the axis of the cable 70 as viewed along the cable 70, and the outer diameter thereof is larger than the inner diameter of the extraction hole portion 98.

  The distance between the drop prevention part 94 and the entry prevention part 95 is set to be the same as the thickness of the peripheral wall part 105 of the rod 91 or slightly larger than the thickness of the peripheral wall part 105.

  Each cable 70 has a length that allows the attachment hole 98 to be a fixing destination of the cable 70 to be arbitrarily selected. More specifically, in each cable, the length from the motor casing 21 to the removal preventing portion 94 has a sufficient length so that the attachment hole portion 98 as a fixing destination can be arbitrarily selected.

  In the submersible pump device 10 configured as described above, each float switch 60 is turned on when the float switch 60 floats on the liquid surface and the posture of the float switch 60 changes according to the fluctuation of the water level. The height position of the float switch 60 is adjusted so that the water level is turned on when the water level reaches the water level at which the submersible pump device 10 is activated.

  For this reason, when the water level becomes the water level at which the submersible pump device 10 is activated, the float switch 60 is turned on, and the signal is transmitted to the control device 80 via the cable 70. When the float switch 60 is turned on, the control device 80 drives the motor 20 and draws water by the pump unit 50.

  When the water level drops and the float switch 60 is turned off, in other words, when the on signal is not transmitted from the float switch 60, the control device 80 stops driving the motor 20.

  Next, an example of the operation of supporting the cable 70 on the motor casing 21 by the cable support device 90 will be described. First, the rod 91 is removed from the fixing device 93. Next, the first member 96 and the second member 97 of the rod 91 are separated.

  Next, the portion of the one cable 70 between the disconnection prevention portion 94 and the entry prevention portion 95 is engaged with the first portion 99 of the desired extraction hole portion 98 of the first member 96. At this time, the drop prevention part 94 is arranged inside the rod 91, and the entry prevention part 95 is arranged outside the rod 91. Since the peripheral wall portion 105 of the rod 91 is clamped by the disconnection prevention portion 94 and the entry prevention portion 95, the cable 70 can be easily fixed to the first portion 99. Next, the other cable 70 is also fixed to the first portion 99 in the same manner as the one cable 70.

  Next, the part on the motor casing 21 side in both cables 70 is passed through the part formed in the first part 99 of the insertion hole 101. At this time, as shown in FIG. 1, in the cable 70, the length of the portion between the insertion hole 101 and the motor casing 21 is adjusted so that the portion does not interfere with the surroundings. As shown in FIG. 1, the cable 70 is folded and accommodated in the rod 91 so that the portion between the motor casing 21 and the insertion hole 101 is located between the take-out hole 98 and the insertion hole 101. The length of the part between can be adjusted.

  Next, the second member 97 is fixed to the first member 96. At this time, the postures of the first member 96 and the second member 97 are matched so that the cable 70 is accommodated in the second portion 100 of the second member 97.

  Next, the rod 91 fixed integrally is fixed to the motor casing 21 by the fixing device 93. Specifically, the position of the tip of the bolt 103 is retracted by loosening the bolt 103. As a result, the rod 91 can be inserted into the annular member 102. After the rod 91 is inserted into the annular member 102 and the height of the rod 91 is adjusted, the bolt 103 is rotated to press the tip of the bolt 103 against the rod 91. The rod 91 is fixed by being sandwiched between the tip of the bolt 103 and the annular member 102.

  In the cable support device 90 configured as described above, the accommodation space inside the rod 91 has a size that can be accommodated even when the cable 70 is folded. Thus, even when the length of the cable 70 is set to be long so that the position of the float switch 60 can be adjusted, the cable 70 is folded and accommodated in the rod 91 so that the cable 70 can be inserted. The portion between the hole 101 and the motor casing 21 can be adjusted to a length that does not interfere with the surroundings.

  For this reason, it can prevent that the part between the insertion hole part 101 and the motor casing 21 in the cable 70 interferes with the circumference | surroundings. In particular, since the portion can be prevented from contacting the float switch 60, it is possible to prevent the malfunction of the float switch 60 caused by the contact.

  In addition, since the rod 91 has a structure that can be divided into a plurality of parts, the operation of housing the cable 70 in the rod 91 is facilitated.

  In addition, a plurality of extraction holes 98 are formed in the rod 91. For this reason, it is possible to suppress the occurrence of malfunction of the float switch 60. This point will be specifically described. For example, when the position of the float switch can be arbitrarily determined with respect to the rod, for example, when a cable is fixed using a clamping member that can be fixed at an arbitrary position of the rod, a pair of float switches arranged in the vertical direction The distance between them may be too close, and the float switches may come into contact with each other.

  However, since the position of the take-out hole 98 is determined in advance, the float switch 60 does not become too close, so that the float switches 60 can be prevented from contacting each other.

  In addition, since three or more extraction hole portions 98 are formed and the intervals between the extraction hole portions 98 are equal to each other, the position of the float switch 60 with respect to the rod 91 can be easily adjusted.

  Furthermore, since the position of the rod 91 with respect to the motor casing 21 can be adjusted by the fixing device 93, the position of the float switch 60 can be freely determined.

  Further, since the inner diameter of the take-out hole 98 is larger than the outer diameter of the cable 70, the cable 70 is not sandwiched by the take-out hole 98. For this reason, it can prevent that the metal wire 76 in the cable 70 is disconnected. This point will be specifically described.

  When the inner diameter of the extraction hole 98 is smaller than the outer diameter of the cable 70, the cable 70 is sandwiched and fixed by the extraction hole 98. In this case, when the cable 70 bends when the float switch 60 moves up and down in accordance with the fluctuation of the water level, the cable 70 always bends at the portion that contacts the edge of the take-out hole 98, and the bend The curve gets smaller. For this reason, there exists a possibility that the metal wire 76 may be disconnected by metal fatigue.

  However, in this embodiment, the takeout hole 98 is formed larger than the cable 70, and therefore the cable 70 can move within the takeout hole 98. Specifically, the cable 70 can move up and down in the take-out hole 98. For this reason, when the cable 70 is to be bent in accordance with the vertical movement of the float switch 60, first, the cable 70 moves upward in the take-out hole 98. When the cable 70 comes into contact with the upper end of the peripheral edge 110 of the extraction hole 98, the cable 70 is bent. Thus, the fluctuation of the float switch 60 is first absorbed by the movement of the cable 70 in the take-out hole 98. For this reason, even if the cable 70 is bent, the bending curve becomes relatively large. For this reason, it can prevent that the metal wire 76 in the cable 70 is cut | disconnected by metal fatigue.

  In addition, the cable 70 is prevented from moving to the outside through the take-out hole 98 by the drop prevention part 94 coming into contact with the edge of the take-out hole 98, so that the float switch 60 is removed from the take-out hole 98 in the cable 70. Can be prevented from becoming unnecessarily long. For this reason, it is possible to prevent the cable 70 from being entangled or contacting the cable 70 with the other float switch 60.

  Further, when the entry preventing portion 95 contacts the edge portion of the take-out hole portion 98, the cable 70 can be prevented from entering the rod 91. For this reason, it is possible to prevent the length from the rod 91 to the float switch 60 in the cable 70 from becoming too short. For this reason, it is possible to prevent the float switch 60 from coming into contact with the rod 91 due to the shortening of the cable 70.

  Moreover, the position of the float switch 60 can be adjusted by forming the plurality of extraction holes 98. Moreover, since the position of the rod 91 with respect to the motor casing 21 can be adjusted by the fixing device 93, the position of the float switch 60 can be finely adjusted.

  In the present embodiment, the cross section of the cable 70 perpendicular to the axis is a circle, and the shape of the extraction hole 98 is a circle. The inner diameter of the extraction hole 98 is larger than the outer diameter of the cable 70. This is an example in which the take-out hole portion has a size having a gap continuous around the cable between the inner peripheral edge of the take-out hole and the cable.

  In the present embodiment, a plurality of extraction hole portions 98 are formed, and six are formed as an example when three or more of the plurality are formed. As another example, the number of the extraction hole 98 may be one. Or, as in this embodiment, there may be a plurality, three or more. That is, one or more extraction holes 98 may be provided. By forming a plurality of extraction hole portions 98, the above-described effects can be obtained. Further, the above-described effects can be obtained by forming three or more extraction hole portions 98 and having an equal interval between the extraction hole portions 98.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, you may delete some components from all the components shown by embodiment mentioned above.

  DESCRIPTION OF SYMBOLS 10 ... Submersible pump apparatus, 20 ... Motor (drive part), 60 ... Float switch, 70 ... Cable, 80 ... Control apparatus (control part), 90 ... Cable support apparatus, 91 ... Rod (accommodating part), 93 ... Fixing apparatus , 94... Preventing portion (fixed portion), 95. Intrusion preventing portion (fixed portion), 98.

Claims (9)

A cable support device for supporting a cable,
An accommodating portion in which an accommodating space that can be accommodated in a folded state of the cable is provided;
A cable support device comprising: an extraction hole formed in the housing portion and communicating with the inside and outside of the housing portion to pass the cable. 2. The cable support device according to claim 1, wherein the take-out hole portion has a size having a gap continuous around the cable between an inner peripheral edge of the take-out hole portion and the cable.   2. The cable according to claim 1, further comprising a fixing portion that is provided at a predetermined length position from one end of a portion of the cable that goes out through the extraction hole and that fixes the cable to the extraction hole. 3. The cable support device according to 2. The fixing portion is provided in a position where the cable is inside the housing portion with the take-out hole portion sandwiched between the cable, and an entrance provided in a position outside the housing portion with the take-out hole portion sandwiched in the cable. A prevention part,
4. The cable according to claim 3, wherein the disconnection prevention unit and the entry prevention unit have a size that comes into contact with an edge portion of the extraction hole when the cable moves from the predetermined position. 5. Support device. The cable support device according to any one of claims 1 to 4, wherein one or more extraction holes are formed. The accommodating portion is rod-shaped,
The cable support device according to any one of claims 1 to 4, wherein a plurality of the extraction hole portions are formed along a direction in which the housing portion extends. Three or more extraction holes are formed,
The cable support device according to claim 6, wherein the intervals between the plurality of extraction holes are set at equal intervals. A fixing device for fixing the accommodating portion to the fixed portion, comprising: a fixing device capable of adjusting a position of the accommodating portion relative to the fixed portion along a direction in which the accommodating portion extends. The cable support device according to claim 6 or 7. A pump section;
A drive unit for driving the pump unit;
A control unit for controlling the driving unit;
A float switch;
A cable connected to the float switch and the control unit and capable of transmitting an output signal of the float switch to the control unit;
A cable support device for supporting the cable, wherein an accommodation space that can be accommodated in a folded state of the cable is formed inside, and the accommodation portion is formed in the accommodation portion so as to communicate between the inside and outside of the accommodation portion. A submersible pump device comprising: a cable support device including a take-out hole portion through which the cable passes.

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