JP2019203465A - Pump device - Google Patents

Abstract

To provide a pump device capable of pumping a storage liquid in a container while suppressing generation of bubbles and denaturation of liquidity of the storage liquid and reducing cost required for heating the storage liquid.SOLUTION: A pump device 10 comprises a pump part 20 and a container-side heating device 50 which is disposed around a container 2. Both or one of the container 2 and the pump part 20 is made movable relatively in a fluctuation direction X of a liquid level. The container-side heating device 50 forms multiple heating object regions R in which a storage liquid 1 is heated. The multiple heating object regions R are arrayed in the fluctuation direction X. A heating state of one or two or more heating object regions R corresponding to a position of a suction port 24 of the pump part 20 is different from a heating state of the other heating object regions R.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pump device that pumps a stored liquid such as a sealant or food material stored in a container such as a pail can, and a method for heating the stored liquid.

  Conventionally, as a pump device that pumps the stored liquid stored in a container such as a pail can, a pump device that pumps the liquid by heating the stored liquid to reduce the viscosity of the liquid, a pump unit, piping, etc. A method for reducing the viscosity of a liquid by heating is provided.

  For example, the following Patent Document 1 discloses a viscous material supply apparatus including a pressing unit provided with a heating unit. The supply device disclosed in Patent Document 1 is configured to heat the viscous material to a predetermined temperature by a heating unit, and reliably and easily suck the viscous material whose fluidity is improved when the viscous material is pumped and supplied. Yes.

  Patent Document 2 below describes a high-viscosity material pump including a plate provided with a main heater. In the high viscosity material pump described in Patent Document 2, the high viscosity material is in direct contact with the heater, so that the heating time can be shortened, and the conventional heating chamber is not required, so the equipment cost is low. It is supposed to be done.

Japanese Patent No. 3328809 Japanese Patent Publication No. 07-45871

  However, like the viscous material supply device of Patent Document 1 and the high-viscosity material pump of Patent Document 2, a heating device is provided for the plate that presses the liquid level of the stored liquid, and the liquid level of the stored liquid is increased. In the case of heating (when the liquid surface side is heated), the vicinity of the liquid surface of the stored liquid is heated superficially, so the stored liquid is only heated two-dimensionally. Therefore, when the liquid surface side is heated, the stored liquid that is slightly separated from the pump suction port to the bottom surface side of the container is not sufficiently heated, and the stored liquid with reduced viscosity is not supplied to the suction port. The phenomenon that the pump sucks air and does not suck liquid (air sucking) occurs. When air suction occurs, there is a problem that the stored liquid cannot be pumped out sufficiently and the pumping efficiency of the stored liquid is lowered.

  Further, for example, in order to sufficiently reduce the viscosity of the stored liquid, it is conceivable to warm the entire container. However, there is a concern that when heat is applied to the entire stored liquid in the container at once, a large amount of bubbles are generated and the quality of the liquid is deteriorated.

  Furthermore, if the stored liquid is pumped up while the entire container in which the stored liquid is stored is heated, a difference occurs in the heating time between the stored liquid in the upper part of the container and the stored liquid in the lower part of the container. The stored liquid may continue to be heated more than necessary. Therefore, when the whole container is heated, there is a concern that the liquid stored in the lower part of the container is continuously heated more than necessary, and the liquid property is deteriorated. Furthermore, in order to warm the whole container, appropriate heating time and electric power are required, and there is a concern that the cost increases.

  Therefore, the present invention has an object to provide a pump device that can suppress the generation of bubbles and the deterioration of the liquid property of the stored liquid, reduce the cost required for heating the stored liquid, and pump the stored liquid in the container. .

  The pump device of the present invention provided to solve the above-described problem includes a pump unit that pumps the stored liquid stored in the container, and a container that is disposed around the container and that heats the stored liquid through the container A side heating device and a control device, wherein the pump unit is movable relative to the container in a direction of fluctuation of the liquid level that fluctuates according to pumping of the stored liquid, and the container side heating The temperature device can change the temperature condition for each of a plurality of heating target regions formed in the fluctuation direction, and the control device is located at a position corresponding to the suction port of the pump unit, Alternatively, in the heating target region at a position corresponding to the suction port and one or a plurality of heating target regions adjacent thereto in the decreasing direction of the liquid level, the other of the heating target region at a position away from the suction port. To be higher than the target heating area It is characterized in that operating the container-side heating device.

  According to the pump device of the present invention, the stored liquid can be heated in the vicinity of the suction port of the pump unit disposed in the container, and the viscosity of the stored liquid in the vicinity of the suction port can be reduced. Therefore, the pump device of the present invention can suitably pump up the highly viscous stored liquid. Further, according to the pump device of the present invention, the warming target liquid is heated by gradually switching the warming target area to be warmed according to the relative position of the suction port according to the pumping condition of the stored liquid. Can do.

  Further, according to the pump device of the present invention, while the stored liquid near the suction port of the pump unit is heated, the stored liquid in another heating target area away from the suction port is not heated or temporarily heated. Even if heated, it can be in a relatively low temperature state. In other words, the pump device of the present invention heats the stored liquid in the warming target area that affects the suction by the pump, while the other stored liquids in the warming target area are unnecessarily heated. Can be suppressed. As a result, the pump device of the present invention can prevent the stored liquid from being heated more than necessary and deteriorating the properties of the liquid.

  Furthermore, according to the pump device of the present invention, by heating a part of the stored liquid in the direction of fluctuation of the liquid level as necessary, the cost required for the heating power can be reduced as compared with the case where the entire container is heated. In addition to the reduction, problems such as the generation of bubbles, which are a concern when the entire container is heated at once, can be suppressed.

  Furthermore, according to the pump device of the present invention, the stored liquid can be heated from the outer side in the circumferential direction of the container. In other words, according to the pump device of the present invention, the stored liquid in a predetermined region from the liquid surface toward the bottom can be three-dimensionally heated. Thereby, the pump apparatus of this invention can suppress only the surface side of a liquid level being heated, the suction inlet vicinity of a pump part is not heated, and generating air suction can be suppressed.

  In the pump device according to the present invention, the container-side heating device includes a plurality of heating units that allow the stored liquid to be heated by heat generation, and the heating states of the plurality of heating units are made different. Alternatively, it is desirable that the heating state of two or more of the heating target regions is different from the heating state of the other heating target regions.

  According to the configuration described above, the heating state can be switched for each heating unit, and the heating states of the plurality of heating target regions can be made different.

  Here, when the inventor of the present invention diligently studied the relative movement of the container and the pump part, when the position of the pump part is maintained in the entire pump device, the pipe connecting the pump part and the liquid discharge port It has been found that it is possible to fix the piping and the like, and the structure of the entire apparatus can be simplified.

  The pump device of the present invention provided by the above-described knowledge has a moving device that enables the container to move in the direction of fluctuation of the liquid level.

  According to the pump device of the present invention, the structure of the entire device can be simplified.

  Furthermore, the pump device of the present invention has a plate portion attached to the pump and arranged to cover the liquid level inside the container, and follows the fluctuation of the liquid level accompanying the pumping of the stored liquid. The pump and the plate portion may move in the changing direction.

  According to the above-described configuration, the stored liquid can be pumped out while pressing the liquid surface with the plate portion. As a result, the pump device of the present invention can pump the stored liquid more efficiently.

  In the case where the plate portion as described above is provided, a plate-side heating device that is capable of heating the stored liquid in contact with the liquid surface may be provided.

  According to the above configuration, in addition to heating the stored liquid from the radially outer side of the container by the container side heating device, the stored liquid can be heated from the liquid surface side by the plate side heating device. As a result, the pump device of the present invention can warm the stored liquid more efficiently.

  In the pump device according to the present invention, the container-side heating device includes a plurality of heating units that generate heat when energized, a detection unit that detects a relative position between the container and the pump unit, and the heating An energization adjustment device that adjusts the energization state of the heating unit, and the energization adjustment device adjusts the energization state of the heating unit and a power circuit that connects each of the plurality of heating units and a power source. An energization adjustment unit, and the energization adjustment unit performs energization adjustment based on detection information from the detection unit, and the heating unit in the heating target region at a position corresponding to the suction port is It is characterized in that the temperature is higher than that of the warming portion in the warming target area located away from the mouth.

  In the pump device of the present invention, the adjustment of the energization state with respect to the heating unit by the energization adjustment device is performed according to the relative position between the container and the pump unit detected by the detection unit. Thereby, the heating part in the heating object area | region in the position corresponding to a suction inlet is made into high temperature rather than the heating part in the heating object area | region in the position away from the suction inlet. Therefore, according to the pump apparatus of this invention, according to the relative position of a container and a pump part, the stored liquid of the heating object area | region where a suction inlet is arrange | positioned can be heated efficiently. For example, when the container and the container-side heating device can be moved while maintaining the position of the pump unit with respect to the entire pump device, the heating unit that generates heat can be switched in stages according to the displacement of the liquid level. it can. As a result, in the pump device of the present invention, the stored liquid in the other heating target areas continues to be heated while gradually switching the heating target area that is the heating target corresponding to the displacement of the liquid level. Can be suppressed.

  Here, when each of the plurality of heating units is provided with a switch unit and further provided with a power supply circuit corresponding to each switch unit, the control of heating the heating unit can be performed flexibly. On the other hand, there is a case where it is not assumed that all of the heating units are heated. For example, when three or more heating parts are provided, when one or two heating parts are heated according to the position of the suction port, a situation where all the heating parts are heated does not occur. As a result of intensive studies by the inventor of the present invention in consideration of the above, if the control is appropriately performed using a multi-throw switch having a plurality of contacts in the energization adjusting device, the device configuration and the control method can be simplified. We have come to the knowledge that we can make further contributions through development.

  In the pump device of the present invention provided by the above knowledge, the energization adjustment unit includes a plurality of multi-throw switches having a plurality of contacts, and each of the contacts corresponds to each of the heating units. A power supply circuit is connected, and the energization adjustment unit performs energization adjustment by changing a combination of contacts brought into a conductive state in the multi-throw switch.

  According to the above-described configuration, by appropriately changing the combination of the contacts that are in the conductive state in the multi-throw switch, the heating unit at the place where heating is necessary can be appropriately operated. Therefore, according to the above-described configuration, the device configuration and control method of the pump device can be further simplified.

  The pump device of the present invention includes a detection unit that detects a relative position between the container and the pump unit, and the container-side heating device is capable of heating the stored liquid by heat generation. The heating state of the heating unit may be controlled based on the detection information of the detection unit.

  According to the above-described configuration, the relative position between the container and the pump unit can be detected to determine the position of the suction port with respect to the container, and the corresponding stored liquid in the heating target region can be heated.

  The pump device according to the present invention is configured such that the heating target region corresponding to the position of the suction port and the heating target region adjacent thereto in the decreasing direction of the liquid level are compared to the other heating target regions. Alternatively, the container-side heating device may be operated so that the temperature becomes high.

  According to the above-described configuration, the stored liquid can be preliminarily heated not only in the heating target area corresponding to the position of the suction port but also in the heating target area adjacent to the temperature reduction direction. it can. For example, in consideration of the temperature and viscosity of the stored liquid, room temperature, or the like, the stored liquid slightly separated from the suction port can be preliminarily heated. Thereby, the pump device of the present invention can pump the stored liquid more efficiently.

  In the pump device of the present invention, the pump portion includes a male screw portion having a male screw shape, and a rotor that rotates by transmitting rotational power and a female screw-like through hole into which the male screw portion can be inserted are formed. A uniaxial eccentric screw pump having a stationary stator is desirable.

  According to the above-described configuration, the stored liquid can be pumped up with high quantitativeness and strong suction force.

  According to the present invention, it is possible to provide a pump device that can suppress the generation of bubbles and the deterioration of the liquid property of the stored liquid, reduce the cost required for heating the stored liquid, and pump the stored liquid in the container. it can.

It is a perspective view which shows the pump apparatus which concerns on 1st embodiment of this invention. It is a side view of the pump apparatus of FIG. It is sectional drawing which shows the pump part of the pump apparatus of FIG. In the pump apparatus of this invention, it is sectional drawing which shows the example of a follow plate provided with a plate side heating apparatus. It is a schematic diagram which shows the raising / lowering apparatus and container side heating apparatus of the pump apparatus of FIG. It is a schematic diagram which shows the detection part of the pump apparatus of FIG. It is a schematic diagram which shows the electricity supply adjustment apparatus of the pump apparatus of FIG. 1, a detection part, and a control part. It is a schematic diagram which shows arrangement | positioning of the suction inlet and heating object area | region of the pump apparatus of FIG. It is a figure which shows an example of control of the heater part of the pump apparatus of FIG. It is a schematic diagram which shows the pump apparatus which concerns on 2nd embodiment of this invention. It is a figure which shows the 1st example of the energization state of the heater part of the pump apparatus of FIG. It is a figure which shows the 2nd example of the energization state of the heater part of the pump apparatus of FIG.

  Hereinafter, embodiments of the present invention will be specifically described. FIG. 1 is a perspective view showing a pump device 10 according to a first embodiment of the present invention. The pump device 10 is used to pump out the stored liquid 1 stored in a container 2 such as a pail can or a drum can.

  The storage liquid 1 described in the present embodiment is a high-viscosity liquid such as a paste-like or cream-like food material or a sealant. The stored liquid 1 is accommodated in a container 2 such as a pail can. In addition, the liquid used as the drawing object of the pump apparatus of this invention is not limited to a high viscosity liquid. The pump device of the present invention may draw out a low-viscosity liquid.

  If the container 2 is arrange | positioned at the pump apparatus 10, it will be arrange | positioned so that an axial direction may follow an up-down direction. Therefore, the liquid level F of the stored liquid 1 stored in the container 2 is displaced in the vertical direction of the stored liquid 1. More specifically, the liquid level F of the stored liquid 1 stored in the container 2 is such that the stored liquid 1 is pumped out of the container 2 and the remaining amount of the stored liquid 1 stored in the container 2 decreases. Along with this, the container 2 is displaced downward. In the following description, the displacement direction (vertical direction) of the liquid level F of the stored liquid 1 may be described as “variation direction X”.

  As shown in FIG. 1, the pump device 10 includes a pedestal portion 12, a support column portion 14, a pump portion 20, an elevating device 40 (moving device), a container side heating device 50, a follow plate 70 (plate portion), and a control unit 90. have. In addition, as shown in FIGS. 6 and 7, the pump device 10 includes an energization adjusting device 60 and a detection unit 80.

  The pump device 10 is configured such that the support column portion 14 is erected with respect to the pedestal portion 12 so as to extend in the vertical direction (variation direction X). The pump device 10 is configured such that the pump unit 20 and the lifting device 40 are attached to the support column 14.

  The pump unit 20 is for sucking and transporting the stored liquid 1. The pump unit 20 of the present embodiment employs a uniaxial eccentric screw pump of a positive displacement rotary pump. As shown in FIG. 2, the pump unit 20 is attached to the upper end of the support column 14 via the bracket 16.

  As shown in FIGS. 1 and 3, the pump unit 20 includes a stator casing 22, a stator 26, a rotor 28, a power transmission unit 32, and a drive unit 36. As shown in FIG. 3, the pump unit 20 is configured such that the stator 26, the rotor 28, the power transmission unit 32, and the like are accommodated inside the stator casing 22.

  As shown in FIG. 3, the pump part 20 is provided with a first opening 21a and a second opening 21b. The pump unit 20 can cause the first opening 21 a to function as the suction port 24 and pump the stored liquid 1 from the container 2 at a predetermined flow rate. In addition, the pump unit 20 can cause the second opening 21 b to function as the discharge port 34. In addition, a transfer pipe (not shown) is connected to the second opening 21b, and the stored liquid 1 can be transferred to another container or the like through the transfer pipe.

  The pump unit 20 can cause the first opening 21 a to function as the suction port 24 and the second opening 21 b as the discharge port 34 by rotating the rotor 28 in the forward direction. Further, by rotating the rotor 28 in the reverse direction for maintenance or the like, the pump unit 20 sucks the cleaning liquid from the second opening 21b and discharges the sucked cleaning liquid or the like from the first opening 21a. The interior space of the stator casing 22 can be cleaned.

  The stator 26 is a member made of an elastic body typified by rubber, resin, or the like and having a substantially cylindrical appearance. The material of the stator 26 is appropriately selected according to the type and properties of the stored liquid 1 to be pumped out by the pump device 10. An insertion hole 27 is formed in the stator 26, and the inner peripheral surface 26a is formed in a single-stage or multi-stage female screw shape with n strips. In the present embodiment, as shown in FIG. 3, the stator 26 is formed with insertion holes 27 that are formed in two stages and have a multistage female thread shape.

  As shown in FIG. 3, the rotor 28 is a metal shaft, and has a single-stage or multi-stage male screw shape with n−1 strips. In the present embodiment, the rotor 28 has a male screw shape that is eccentric in one line. The rotor 28 has a substantially true circular cross section at any position in the longitudinal direction. The rotor 28 is inserted into the insertion hole 27 formed in the stator 26 described above, and can freely rotate eccentrically inside the insertion hole 27.

  When the rotor 28 is inserted into the stator 26, the outer peripheral wall 28 a of the rotor 28 and the inner peripheral surface 26 a of the stator 26 are in close contact with each other at the tangent line therebetween, and the inner peripheral surface 26 a of the stator 26 and the outer peripheral wall of the rotor 28 are brought into contact. A fluid conveyance path 30 (cavity) is formed between the fluid 28a and 28a. The fluid conveyance path 30 extends in a spiral shape in the longitudinal direction of the stator 26 and the rotor 28.

  When the rotor 28 is rotated in the insertion hole 27 of the stator 26, the fluid conveyance path 30 advances in the longitudinal direction of the stator 26 while rotating in the stator 26. Therefore, when the rotor 28 is rotated, the fluid (reserved liquid 1) is sucked into the fluid conveyance path 30 from one end side of the stator 26, and the fluid is confined in the fluid conveyance path 30 in both ends of the stator 26. It can be transferred toward one end and discharged at the other end of the stator 26.

  The power transmission unit 32 is for transmitting power from the drive unit 36 to the rotor 28 described above. The power transmission unit 32 connects the rotation shaft of the drive unit 36 and the rotor 28 so as to allow eccentric rotation. The power transmission unit 32 can be variously selected such as a flexible rod and an Oldham joint.

  The lifting device 40 (moving device) is provided to displace the relative position of the container 2 and the container side heating device 50 with respect to the pump unit 20. More specifically, the elevating device 40 raises or lowers the container 2 and the container side warming device 50 along the fluctuation direction X, so that the container 2 and the container side warming device 50 with respect to the pump unit 20 are moved. The relative position can be displaced.

  As shown in FIGS. 1 and 5, the lifting device 40 includes a rail portion 42, a slider portion 44, and a support base 46.

  The rail portion 42 is provided as a guide member for moving the slider portion 44 in the fluctuation direction X. The rail part 42 is attached to the support | pillar part 14 so that a longitudinal direction may become the attitude | position which follows the fluctuation direction X. The slider portion 44 is attached to the rail portion 42. The slider portion 44 is movable by sliding on the rail portion 42.

  The support base 46 is provided to support the container 2. The support base 46 is formed with a flat loading surface 46a so that the container 2 can be loaded thereon. Further, the support base 46 is attached to the slider portion 44 via a connecting portion 48. Further, a container side heating device 50 is attached to the connecting portion 48. Therefore, the container 2 and the container-side heating device 50 move in the fluctuation direction X as the slider portion 44 moves.

  As shown in FIG. 2, the pump unit 20 is attached to the upper end of the support column 14 via the bracket 16 so as to be in a posture along the changing direction X. In other words, the pump unit 20 is disposed in a state where the relative position with respect to the support column unit 14 is maintained. Therefore, when the support base 46 is displaced with respect to the column part 14, the container 2 placed on the support base 46 changes the relative position with respect to the pump part 20. In other words, the pump device 10 according to the present embodiment moves the container 2 relative to each other by moving the container 2 while maintaining the position of the pump unit 20. Thereby, the pump apparatus 10 is arranged such that the liquid level F is arranged in the vicinity of the suction port 24 when the liquid level F of the stored liquid 1 is displaced according to the change in the remaining amount of the stored liquid 1 in the container 2. Displace the container 2 (support base 46).

  In addition, about the mechanism which moves the slider part 44 of the raising / lowering apparatus 40, the rotation mechanism connected with the slider part 44 is provided, for example, and it can be based on motive power, such as manual operation or a motor. Further, a mechanism such as a cylinder may be provided as a mechanism for moving the slider portion 44. The structure of the lifting device 40 that moves the slider portion 44 can be variously selected.

  The container-side heating device 50 is provided for heating the stored liquid 1 accommodated in the container 2. As shown in FIG. 1, the container-side heating device 50 is disposed around the container 2. The container side heating device 50 of the present embodiment is provided with a plurality of heater portions 52 (heating portions) that generate heat due to electrical resistance. The heater unit 52 is in a heat generation state that generates heat when energized, and is in a non-heat generation state that does not generate heat when the energization is interrupted.

  Further, as will be described in detail later, a plurality (three in this embodiment) of heater units 52 are connected to a switch unit 62 that switches between energization connection and cutoff for each. Therefore, each heater unit 52 can switch between a heat generation state and a non-heat generation state. The container-side heating device 50 controls each heater unit 52 in either a heat generation state or a non-heat generation state, and determines whether or not to warm the stored liquid 1 for each heating target region R described later. Can be switched.

  As shown in FIG. 5, the container-side heating device 50 includes a first heater part 52 a, a second heater part 52 b, and a third heater part 52 c as the plurality of heater parts 52. The first heater part 52a, the second heater part 52b, and the third heater part 52c are arranged along the fluctuation direction X. The container-side warming device 50 can heat the stored liquid 1 in the container 2 from the radially outer side of the container 2 by causing the heater unit 52 to generate heat. In addition, the container-side warming device 50 can heat the stored liquid 1 over a predetermined range in the fluctuation direction X of the container 2 by the heater unit 52.

  The container-side heating device 50 forms three heating target regions R that can heat the stored liquid 1 inside the container 2 by causing the heater unit 52 to generate heat. More specifically, as shown in FIG. 5, the container-side heating device 50 includes a first heating target region R1 in which the stored liquid 1 is heated by causing the first heater portion 52a to generate heat, and a second heater. A second warming target region R2 in which the stored liquid 1 is heated by heating the part 52b, and a third warming target region R3 in which the stored liquid 1 is warmed by generating heat in the third heater part 52c. Form.

  The container-side warming device 50 heats one or two heater portions 52 and does not heat the other heater portions 52, thereby heating the one warming target region R and another warming target region R. Can be different. In other words, the container-side heating device 50 has a portion in which the stored liquid 1 is heated in the fluctuation direction X of the container 2, and the stored liquid 1 is heated at a relatively low temperature, or the stored liquid 1 is not heated. A part can be formed and a heating state can be varied among several heating object area | regions R. FIG. The pump device of the present invention may be capable of switching the heat generation state of the heater unit (heating unit) stepwise or steplessly. For example, in the pump device of the present invention, heat generation states having different temperatures between a plurality of heating target regions are set, and the heating states of some heating target regions are different from the heating states of other heating target regions. May be.

  The energization adjustment device 60 is provided for performing energization adjustment to the heater unit 52 under the control of the control unit 90 based on detection information of the detection unit 80 described later. As shown in FIG. 7, the energization adjustment device 60 includes a switch unit 62 (energization adjustment unit) and a power supply circuit 64. The energization adjustment device 60 performs energization adjustment by the switch unit 62 based on the detection information of the detection unit 80 transmitted via the control unit 90, and controls the heat generation state of the heater unit 52.

  The switch unit 62 is a so-called single pole single throw type switch. The switch unit 62 can switch the energization state to the heater unit 52 connected to the power channel 66 via the power circuit 64. The energization adjusting device 60 allows the energization of the heater unit 52 by turning on the switch unit 62 and can interrupt the energization of the heater unit 52 by setting the switch unit 62 to the off state. The switch unit 62 operates based on a control signal output from the control unit 90.

  As shown in FIG. 7, the energization adjustment device 60 of this embodiment is provided with a switch unit 62, a power supply circuit 64, and a power supply channel 66 so as to correspond to each heater unit 52. More specifically, the energization adjusting device 60 of this embodiment includes a switch unit 62a corresponding to the first heater unit 52a, a power supply circuit 64a, a power supply channel 66a, a switch unit 62b corresponding to the second heater unit 52b, a power supply. A switch part 62c, a power supply circuit 64c, and a power supply channel 66c corresponding to the circuit 64a, the power supply channel 66b, and the third heater part 52c are provided. Therefore, the energization adjustment device 60 can individually control energization for each heater 52.

  The detection unit 80 is provided to detect the position of the slider unit 44 in the fluctuation direction X. The detection unit 80 can detect the amount of displacement of the slider unit 44 using, for example, an encoder, but in the present embodiment, the position of the slider unit 44 can be detected by providing three sensors 82. ing. More specifically, the detection unit 80 includes a first sensor 82a, a second sensor 82b, and a third sensor 82c. The detection unit 80 can detect the presence or absence of the slider unit 44 by the first sensor 82a, the second sensor 82b, and the third sensor 82c. The detection signal output from the detection unit 80 is utilized for deriving the position of the slider unit 44 in the control unit 90 as described in detail later.

  The follow plate 70 (plate portion) is provided to press the liquid level F of the stored liquid 1 accommodated in the container 2. As shown in FIG. 1, the follow plate 70 has a substantially disk-like appearance having a predetermined thickness.

  As shown in FIGS. 1 and 3, the follow plate 70 has a diameter that substantially matches the inner diameter of the container 2. Therefore, when the follow plate 70 is fitted into the container 2, the follow plate 70 is disposed so as to close the container 2, and is in close contact with the liquid surface F of the stored liquid 1.

  As shown in FIG. 3, the follow plate 70 is attached to the pump unit 20. More specifically, the follow plate 70 is attached to the pump unit 20 so as to surround the first opening 21a (suction port 24). Therefore, the position of the pressing surface 70 a (the lower surface in FIG. 3) disposed on the stored liquid 1 side of the follow plate 70 and the position of the suction port 24 substantially coincide with each other in the fluctuation direction X of the container 2. The follow plate 70 is attached to the pump unit 20. Therefore, the follow plate 70 can move in the fluctuation direction X together with the pump device 10.

  As shown in FIG. 3, the follow plate 70 is attached to the pump unit 20 so as to surround the end of the stator casing 22.

  The follow plate 70 of the pump device 10 of the present invention may include a plate-side heating device 72. For example, the plate-side heating device 72 provided on the follow plate 70 shown in FIG. 4 is provided as an electric heater that generates heat by electric resistance. The plate side heating device 72 is arranged on the pressing surface 70 a side of the follow plate 70 and can heat the stored liquid 1 while being in contact with the liquid level F. As a result, the pump device 10 can heat the stored liquid 1 from the outer side in the circumferential direction of the container 2 by the container side heating device 50, and also warms the stored liquid 1 by the plate side heating device 72. be able to.

  Next, control of the position of the container 2 and the heating state in the pump device 10 will be described with reference to FIGS. 7, 8, and 9. As described above, the pump device 10 of the present embodiment performs energization control (heat generation control) to each heater unit 52 under the control of the control unit 90 based on the detection information of the detection unit 80.

  For example, in the state shown in FIG. 7, that is, in the state where the slider portion 44 is detected by the third sensor 82c and the slider portion 44 is not detected by the second sensor 82b, the stored liquid 1 in the first warming target region R1 is heated. The stored liquid 1 in the second warming target region R2 is not heated or preheated. More specifically, in a state where the slider part 44 is detected by the third sensor 82c and the slider part 44 is not detected by the second sensor 82b, the control unit 90 sets the first heater part 52a in a heat generation state (ON), Energization control is performed so that the second heater portion 52b is in a heat generation state (ON) or a non-heat generation state (OFF).

  Further, as shown in FIG. 8A, in a state where the slider portion 44 is detected by the second sensor 82b and the third sensor 82c, the slider portion 44 is positioned adjacent to both the second sensor 84 and the third sensor 86. Arranged at Ps1. Moreover, the suction inlet 24 will be in the state arrange | positioned in 1st heating object area | region R1 heated by the 1st heater part 52a.

  As described above, when the slider portion 44 is detected by the second sensor 82b and the third sensor 82c, the controller 90, as shown in FIG. 9A, the first heater portion 52a and the second heater portion 52b. Is set in a heat generation state (ON), and energization control is performed so that the third heater portion 52c is in a heat generation state (ON) or a non-heat generation state (OFF). Thereby, the stored liquid 1 in the first warming target area R1 and the second warming target area R2 is heated, and the stored liquid 1 in the third warming target area R3 is not heated or is preheated. It becomes. In addition, when the 3rd heating object area | region R3 is made into the heat_generation | fever state, the reserved liquid 1 of 2nd heating object area | region R2 can be preheated. In addition, the pump apparatus of this invention is good also as a state by which the heating object area | region in the position corresponding to the suction inlet of a pump part is not heated according to the state of stored liquid. For example, as shown in FIG. 8A, after the stored liquid 1 in the first warming target region R1 located at the position corresponding to the suction port 24 of the pump unit 20 is heated to a predetermined temperature range, At the timing when the pumping of the stored liquid 1 in the first warming target region R1 is about to end soon, the first heater portion 52a in the first warming target region R1 may be in a non-heat generation state (off).

  Further, from the state shown in FIG. 8A, when the remaining amount of the stored liquid 1 changes as the stored liquid 1 is pumped, the pump device 10 raises the slider portion 44 so that the liquid level F of the follow plate 70 is increased. The container 2 is displaced so as to come into contact with the pressing surface 70a. For example, as shown in FIG. 8B, when the liquid level F is displaced by the distance L1 with respect to the fluctuation direction X of the container 2 as the remaining amount of the stored liquid 1 is changed, the slider portion 44 is also changed in accordance with this. Move to distance X by distance L1.

  As shown in FIG. 8B, when the slider portion 44 rises by a distance L1 in the fluctuation direction X, the slider portion 44 is disposed at a position Ps2 adjacent to both the first sensor 82a and the second sensor 82b, and the suction port 24 is It will be in the state arrange | positioned at 2nd heating object area | region R2 heated by the 2nd heater part 52b.

  As described above, when the slider portion 44 is detected by the first sensor 82a and the second sensor 82b, the control unit 90 causes the first heater portion 52a to be in a non-heat generation state (OFF) as shown in FIG. 9B. ), The second heater 52b is set in a heat generation state (on), and the third heater 52c is controlled in a heat generation state (on). Accordingly, the first warming target region R1 is not heated, and the second warming target region R2 and the third warming target region R3 are warmed.

  Thus, the pump apparatus 10 can change the heating state of the heating object area | region R in which the suction inlet 24 is arrange | positioned, and the other heating object area | region R. FIG. Thereby, the pump apparatus 10 heats the stored liquid 1 in the warming target region R where the suction port 24 is arranged, and does not warm the stored liquid 1 in the other warming target region R or a relatively low temperature. Heat with. As a result, the pump device 10 heats the stored liquid 1 in the vicinity of the suction port 24 to reduce the viscosity, smoothly pumps out, and continues to warm the stored liquid 1 that has not yet reached the pumping target area. It is possible to suppress the deterioration of the liquid property of the stored liquid 1.

  As described above, the pump device 10 is based on the detection information detected by the detection unit 80, and the heating target region R in which the suction port 24 is disposed and the heating target region R in the decreasing direction of the liquid level F. Can be controlled to be heated so as to be higher in temperature than other heating target regions R.

  As described above, when the slider portion 44 is detected by the second sensor 82b and the third sensor 82c, the suction port 24 is placed in the first warming target region R1. In this case, the first heater portion 52a and the second heater portion 52b can be in a heat generation state (ON), and the third heater portion 52c can be in a non-heat generation state (OFF). As a result, the stored liquid 1 in the vicinity of the suction port 24 arranged in the first warming target area R1 and the stored liquid 1 in the second warming target area R2 in the decreasing direction of the liquid surface F are heated, and the other heating is performed. It can suppress that the stored liquid 1 of the temperature object area | region R continues heating more than necessary.

  Moreover, the pump apparatus 10 determines the position of the suction port 24 based on the detection information detected by the detection unit 80, and the heating target region R in which the suction port 24 is disposed and the heating target adjacent thereto. Control to warm the region can be performed.

  Thus, when the slider part 44 is detected by the 2nd sensor 82b and the 3rd sensor 82c, it will be in the state by which the inlet 24 was arrange | positioned in 1st heating object area | region R1. In this case, the first heater part 52a and the second heater part 52b are in a heat generation state (ON), and the third heater part 52c is in a non-heat generation state (OFF). Accordingly, the stored liquid 1 in the vicinity of the suction port 24 arranged in the first warming target region R1 is warmed and the adjacent stored liquid 1 is preliminarily warmed, and the stored liquid 1 in the other warming target region R is heated. It can suppress that it continues heating more than necessary. The pump device of the present invention warms the stored liquid in one heating target area at a position corresponding to the suction port, and preheats the stored liquid in the heating target area in the decreasing direction of the liquid level. Control which does not heat may be performed.

  Furthermore, in the pump device of the present invention, a detector that can detect the amount of displacement of the detected member, such as an encoder or a limit switch, may be used instead of the sensor.

  Note that the switching control of the heater unit 52 described above can be similarly applied to the pump device 100 according to the second embodiment described later.

<Second embodiment>
Then, the pump apparatus 100 which concerns on 2nd embodiment of this invention is demonstrated. The pump device 100 includes a pedestal unit 12, a support column unit 14, a pump unit 20, a lifting device 40, a follow plate 70, a detection unit 80, and a control unit 90. In addition, since these structures are the same as each structure of the pump apparatus 10 which concerns on 1st embodiment, detailed description is abbreviate | omitted.

  As shown in FIG. 10, the pump device 100 includes a container-side heating device 150 and an energization adjustment device 160 in addition to the above-described configuration.

  The container-side heating device 150 of this embodiment includes four heater units 152. More specifically, the container-side heating device 50 includes a first heater part 152a, a second heater part 152b, a third heater part 152c, and a fourth heater part 152d. The container-side heating device 150 has a configuration in which these four heaters 152 are arranged in the fluctuation direction X. Similarly to the heater unit 52 in the first embodiment, the heater unit 152 is in a heat generation state that generates heat when energized, and is in a non-heat generation state that does not generate heat when the energization is interrupted.

  The container-side heating device 150 can heat the stored liquid 1 in the four heating target regions R100 by causing each heater unit 152 to generate heat. More specifically, the container-side warming device 150 can heat the stored liquid 1 in the first warming target region R101 by causing the first heater unit 152a to generate heat. Similarly, the container-side heating device 150 heats the stored liquid 1 in the second warming target region R102 by causing the second heater portion 152b to generate heat, and causes the third heater portion 152c to generate heat to generate the third heating. The stored liquid 1 can be heated in the heated fourth heating target region R104 by heating the stored liquid 1 in the warm target region R103 and causing the fourth heater portion 152d to generate heat.

  The energization adjustment device 160 is configured so that energization adjustment to the four power supply circuits 164 can be performed by the two switch units 162 (energization adjustment units) and the two power supply channels 166. Specifically, the energization adjustment device 160 employs a so-called two-pole double-throw switch as the switch unit 162, so that the two power supply circuits 164 can be opened and closed by operating the switch unit 162 once.

  Specifically, of the two switch units 162 provided, the first switch unit 162x is connected to the first power supply channel 166a. A power supply circuit 164a connected to the first heater part 152a is connected to the first pole 162a of the switch part 162x, and a power supply circuit 164c connected to the third heater part 152c is connected to the second pole 162c. Therefore, by switching the switch unit 162x, one of the first heater unit 152a and the third heater unit 152c is set in an energized state (heat generation state) and the other is set in a non-energized state (non-heat generation state). Can do.

  The second switch unit 162y is connected to the second power channel 166b. A power supply circuit 164b connected to the second heater part 152b is connected to the first pole 162b of the switch part 162y, and a power supply circuit 164d connected to the fourth heater part 152d is connected to the second pole 162d. Therefore, by switching the switch unit 162y, one of the second heater unit 152b and the fourth heater unit 152d is set in an energized state (heat generation state) and the other is set in a non-energized state (non-heat generation state). Can do.

  Since the energization adjusting device 160 has the above-described configuration, the first heater unit 152a and the second heater unit 152b are changed by changing the combination of the contacts that are brought into conduction in the two switch units 162x and 162y. In addition, energization control (heat generation control) can be performed on the four heater units 152 including the third heater unit 152c and the fourth heater unit 152d.

  For example, as shown in FIG. 11, when the first pole 162a is turned on in the first switch unit 162x, the second pole 162c is turned off. When the first pole 162b is turned on in the second switch unit 162y, the second pole 162d is turned off. By operating the switch units 162x and 162y in this way, the pump device 100 energizes the first heater unit 152a and the second heater unit 152b to generate heat, and the first heating target region R101 and the second heating target. The stored liquid 1 in the region R102 can be heated.

  For example, as shown in FIG. 12, when the first pole 162a is turned off in the first switch section 162x, the second pole 162c is turned on. When the first pole 162b is turned on in the second switch unit 162y, the second pole 162d is turned off. By operating the switch parts 162x and 162y in this manner, the pump device 100 energizes the second heater part 152b and the third heater part 152c to generate heat, and the second warming target region R102 and the third warming target. The stored liquid 1 in the region R103 can be heated.

  As in the pump device 100 of the present embodiment, a multi-throw switch (two-pole double-throw switch in the present embodiment) having a plurality of (two in the present embodiment) contacts is employed as the switch unit 162. As a result, it is possible to finely control the operation of the heater unit 152 at a location where heating is necessary while minimizing the switch unit 162 and the power supply channel 166. Therefore, according to the above-described configuration, the device configuration and control method of the pump device 100 can be further simplified.

  As mentioned above, although the pump apparatus 10 and the pump apparatus 100 which concern on embodiment of this invention were demonstrated, this invention is not limited to the above-mentioned embodiment.

  In the above-described embodiment, an example in which the heater unit (heating unit) can be switched between the heat generation state (ON) and the non-heat generation state (OFF) by energizing the heater unit (heating unit) has been described. The heating state controlled by is not limited to this. For example, the pump device of the present invention may be capable of switching the heating state of the heating unit stepwise or steplessly. Specifically, the pump device according to the present invention can be switched between two or more heat generation states having different temperatures, and the heating state of some of the heating target regions is different from the heating state of the other heating target regions. It may be allowed.

  Moreover, although the above-mentioned pump apparatus 10 showed the example which provided the container side heating apparatus 50 in the whole region of the circumferential direction of the container 2, the pump apparatus of this invention is not limited to this. For example, the container-side heating device of the pump device of the present invention may be one in which a heating device such as a heater is intermittently provided in the circumferential direction around the container 2.

  In the present embodiment, an example in which the plate side heating device 72 is provided on the follow plate 70 side in addition to the container side heating devices 50 and 150 is shown, but the present invention is not limited to this, and the plate It is good also as not providing the side heating apparatus 72. FIG. Further, instead of the plate-side heating device 72, or in addition to the plate-side heating device 72, another heating device may be provided.

  Furthermore, the stored liquid 1 that is a pumping target of the pump device of the present invention may be stored in a container of any shape. For example, the container may have a substantially rectangular cross-sectional shape such as a canister, as well as a circular cross-sectional shape such as a pail can and a drum can.

  In the above-described embodiment, the container 2 can be moved in the fluctuation direction X and the position of the pump unit 20 is maintained. However, the pump device of the present invention is not limited to this. For example, the pump device of the present invention may maintain the position of the container and move the pump unit. Furthermore, the pump device of the present invention may be configured such that both or one of the pump unit and the container side heating device can be moved by the moving device.

  The pump device of the present invention can be suitably used for a pump that pumps a stored liquid such as a sealant or food material stored in a container such as a pail can.

DESCRIPTION OF SYMBOLS 1 Reservation liquid 2 Container 10,100 Pump apparatus 20 Pump part 24 Suction port 26 Stator 28 Rotor 40 Lifting apparatus 50,150 Container side heating apparatus 52,152 Heater part 60,160 Electricity adjustment apparatus 62,162 Switch part (electricity adjustment) Part)
64,164 Power supply circuit 70 Follow plate 72 Plate side heating device 80 Sensor 82 Sensor F Liquid level R Warming target region R1, R100 First warming target region R100 Warming target region X Fluctuation direction

Claims (9)

A pump section that pumps the stored liquid stored in the container;
A container-side heating device that is disposed around the container and heats the stored liquid via the container;
A control device,
The pump unit can be moved relative to the container in the direction of liquid level fluctuation that varies according to pumping of the stored liquid,
The container-side heating device can change the temperature condition for each of a plurality of heating target regions formed in the fluctuation direction,
The control device is adjacent to the warming target region at a position corresponding to the suction port of the pump unit, or the warming target region at a position corresponding to the suction port, and the decreasing direction of the liquid level relative thereto. The pump apparatus characterized by operating the said container side heating apparatus so that it may become higher temperature than the said other heating object area | region in the one or several heating object area | region to do. The container-side heating device is
A plurality of heating units for heating the stored liquid by heat generation,
The heating state of one or two or more of the heating target regions is made different from the heating state of the other heating target regions by making the heat generation states of the plurality of heating units different. The pump device according to claim 1.   The pump device according to claim 1, further comprising a moving device that allows the container to move in a direction in which the liquid level fluctuates. A plate part attached to the pump and arranged to cover the liquid level inside the container;
The pump device according to any one of claims 1 to 3, wherein the pump and the plate part move in the fluctuation direction following the fluctuation of the liquid level accompanying the pumping of the stored liquid. The container-side heating device includes a plurality of heating units that generate heat when energized,
A detection unit for detecting a relative position between the container and the pump unit;
An energization adjusting device for adjusting the energization state to the heating unit,
The energization adjusting device is
A power supply circuit connecting each of the plurality of heating units and a power supply;
An energization adjustment unit that adjusts the energization state of the heating unit;
The energization adjustment unit performs energization adjustment based on the detection information by the detection unit, and the heating unit in the heating target area at a position corresponding to the suction port is located at a position away from the suction port. The pump device according to any one of claims 1 to 4, wherein the temperature is higher than that of the heating portion in the heating target region. The energization adjustment unit includes a plurality of multi-throw switches with a plurality of contacts,
A power supply circuit corresponding to each of the heating units is connected to each of the contacts,
The pump device according to claim 5, wherein the energization adjustment unit performs energization adjustment by changing a combination of contacts that are brought into conduction in the multi-throw switch. A detection unit that detects a relative position between the container and the pump unit;
The container-side heating device includes a plurality of heating units that can heat the stored liquid by heat generation,
The pump device according to any one of claims 1 to 6, wherein a heat generation state of the heating unit is controlled based on detection information of the detection unit.   The warming target area corresponding to the position of the suction port, and the warming target area adjacent thereto in the decreasing direction of the liquid level to be higher than the other warming target areas. The pump device according to any one of claims 1 to 7, wherein the container side heating device is operated. The pump part is
A rotor that has a male screw portion that is shaped like a male screw, and that is rotated by transmission of rotational power;
The pump device according to any one of claims 1 to 8, wherein the pump device is a uniaxial eccentric screw pump including a stator having a female screw-like through-hole into which the male screw portion can be inserted.

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