JP3041068U - Pump slip prevention protector - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a slip prevention protector for a pump. A micro switch and a delay relay are provided inside an upper cover, and one elastic film piece, one interlocking rod, one interlocking rod guide ring, and one interlocking rod guide ring are provided on the upper part inside the main body connected to the upper cover. An elastic membrane piece fixing ring 7 is provided,
One buffer chamber 18 is provided inside the lower half of the main body 2,
One buffer spring 17, which is used to absorb the transport kinetic energy of water that has entered the main body 2 and supports the float in the buffer chamber 18, is provided with one fluid inlet 19 on one side of the buffer chamber 18. A microswitch is provided with a trigger spring, and a rotatable retaining ring is provided at the end of the trigger spring to connect with the interlocking rod. An electrical arrangement connection port was provided on one side of the top cover in contact.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kind of pump slip prevention protector, and more particularly to a kind of monitor device for preventing burnout and failure due to idling of a pump in an anhydrous state.

[0002]

[Prior art]

 Generally, all transportation equipment using a pump driven by a motor includes a pump, an electromagnetic circuit breaker, and a starting switch (generally a fuse-free breaker). The start switch is a push-button switch that manually controls start and stop, or a float switch that controls the automatic start and operation of the pump by the height difference of the liquid level, or other. There is a control member that controls the automatic start and operation of the pump. In a water supply system installed in a building, upper and lower water storage tanks are provided, liquid level switches are installed in the upper and lower water storage tanks, and the control contact of the liquid level switch is alternately connected in series with the start switch of the pump. In addition, it is installed on the same circuit and automatically starts the pump operation.When the liquid level in the upper water storage tank is lower than the lower limit of the set liquid level and there is water in the lower water storage tank, When the switch contact is made conductive, the electromagnetic switch is automatically activated, the motor is started and the pump is driven, and the water in the lower water storage tank is sent to the upper water storage tank until the upper water storage tank reaches the full water level. Stops when the upper float switch contact is interrupted. The above are the general operating conditions and conditions of pump equipment.Under the condition that the upper water storage tank is dry and the lower water storage tank has water, the pump is partially operable, but the pump When the tank water is sucked out, if the water conduit to the pump is clogged or damaged, or if the foot valve (Foot Valve) at the end of the water conduit leaks, the pump sucks water. I can't. However, at this time, the motor start switch is set to the state "the upper tank is dry and the lower tank is watered, and the electric motor is driven to let the pump suck out water." This will cause the electric motor and pump to burn out as a result of continuous operation under dry conditions. This situation could be a disaster if the transport was oil or chemicals.

[0003]

[Problems to be solved by the device]

 The present invention provides a device at the rear of the pump on the pipeline for detecting the transport state of the fluid in the pipeline and monitoring the operating condition of the pump, so that the pump continuously idles in an anhydrous state. The problem is to prevent burnout and breakdown due to

Next, the present invention makes it possible to automatically interrupt the supply of power by using the above device to prevent the pump from idling continuously in an abnormal state of the pipeline while the pump is being operated. The problem is to prevent burnout of the motor and waste of the power source, and to enable repair personnel to directly judge abnormalities in the pump transportation pipeline.

[0005]

[Means for Solving the Problems]

 In the invention of claim 1, the housing part includes one upper cover, one main body and one lower cover, and the lower half part and the upper half part of the main body are separated by an elastic membrane piece, and the lower half part is provided. And a fluid contact with each other, a micro switch is provided in the upper half for interacting with parts in the upper half, a flange is provided on an upper outer periphery of the main body, and a channel is formed inside the middle stage. A water inlet is provided on one side of the bottom, a buffer chamber is located behind the water inlet, one float is installed in the channel of the main body, and one elastic membrane piece is installed on the upper shoulder inside the main body. The elastic membrane piece has a bowl shape and extends downward into the cabin of the main body, and one circular recess is provided at the center of the elastic membrane piece, and the elastic membrane piece is coupled with the interlocking rod above it by a bolt, Above the elastic membrane piece, there is an interlocking rod arranged with the large bottom and the small top. One fixing plate is provided above the elastic film piece, and one connecting rod guide ring is fitted in the center of the fixing plate, and the connecting rod moves vertically in the center hole of the connecting rod guide ring. One spring is attached to the buffer chamber at the bottom of the main body, is fixed from the bottom by the lower cover, and another connecting flange is provided outside the bottom end of the main body to connect with the flange of the upper cover of the main body. Connected and fixed with bolts, one micro switch and delay relay are installed inside the upper cover, a trigger spring is installed on the micro switch, and a rotatable retaining ring is installed at the end of the trigger spring, and It is used as a pump slip prevention protector that comes into contact with and has an electrical connection port on one side of the top cover that is used to connect to an external circuit.

[0006]

[Embodiment of the invention]

 1 and 2 are an external perspective view and a structural sectional view of the present invention. As shown in FIG. 1, the exterior part of the housing of the present invention includes one upper cover 1, one main body 2 and one lower cover 3. As shown in FIG. 2, one delay relay 12 having a foot seat 11 and a delay adjusting knob 13 is provided inside the upper cover 1, and a micro switch trigger spring 15 and a wiring outlet 16 are provided. A micro switch 14 is provided, and a flange is provided at the bottom end of the upper cover 1 for use in combination with the main body 2 described later. One elastic membrane piece 4, one interlocking rod 5, one interlocking rod guide ring 6, and one elastic membrane piece fixing ring 7 are provided in the upper part inside the main body 2, and the main body 2 is integrally provided at the upper end thereof. It is connected to the upper cover 1 through the flange 8, and one buffer chamber 18 is provided inside the lower half of the main body 2 and is used to absorb the transport kinetic energy of water that has entered the main body 2. While one buffer spring 17 is installed in the buffer chamber 18 to support and position the float, it absorbs the operating energy of the float when the liquid level in the pipeline is lowered, and also disturbs the disturbance. It is used as a flow device to destroy the vortex phenomenon that occurs when the fluid begins to enter the buffer chamber. The lower cover 3 is provided only for facilitating the processing of the present invention, and has a recess formed in the central portion thereof, and serves as a device for supporting and fixing the buffer spring 17. One fluid inlet 19 is provided at one side of the buffer chamber 18, and is connected to the pump transportation pipeline by a pipe joint and is used to guide and enter the fluid. The lower half part and the upper half part of the present invention are separated by the elastic film piece 4, the fluid contacts with the lower half part, the fluid does not enter the upper half part, and the space between the upper cover 1 and the main body 2 is bolted. After they are fixed to each other, the fluid does not enter the inside of the upper cover 1 and, therefore, the internal power supply device is not damaged.

The material of each part is selected according to the difference in fluid. For example, if the fluid to be pumped is water, the body, upper cover, and lower cover are all made of 6061 T6 aluminum alloy, and elastic membrane pieces are used. 4 and seals are made of NBR rubber and other metal parts are made of stainless steel AISI 304 or Nickel-Bronze alloy or equivalent material. If the fluid is a chemical with strong corrosiveness, own metal parts are made of Hastelloy C alloy or other corrosion resistant alloy, and elastic membrane pieces and seals are made of Viton / PTFE synthetic rubber or other. Manufactured from synthetic rubber with corrosion resistance, the main body is made from stainless steel AISI316 or other corrosion resistant alloys, and the wear resistant parts are made from Aluminum-Bronze alloy or other if it is oil or solvent. To do. In summary, the material is decided according to the purpose of use, and the strength of each part material is designed differently according to the standards of each country, for example, the pressure range applied to the connecting flange, or the AN SI 150 LBS standard. Or the size of ANSI 250 LBS standard, JIS 10K, JIS 20K or others. Furthermore, the design of the electrical parts of the present invention and the joints for connection with the outside also differ depending on whether or not it is necessary to prevent explosion depending on the location of use, and in principle, in general water pump applications, Generally, a method of penetrating wires is used for the outer connection of electric parts. However, when used for oil or flammable fluid applications, the arrangement and connection method of electric parts may be different according to the individual circumstances of the installation. Explosion prevention class standard EExe T3 or EExde IIB T4 or Eexedq I Ic T6, or Class, Division, Group, and Zone class of USA standard NEC, or eG3, d2G4 or d3nG of Taiwan standard CNS. Or manufactured to other standards to meet individual needs. It is.

Hereinafter, the operation principle of the present invention will be described.

FIGS. 3, 4, 5 and 6 show how the present invention is connected to a motor starting switch and an electromagnetic circuit breaker in an external pump transportation system after installation, and how the present invention operates. And to protect the motor that drives the pump.

FIG. 3 shows the arrangement of the pump transportation system of the present invention and the state of each correlator before the pump transportation system is not activated. Among them, the parts that come into contact with the fluid are the liquid storage tank, the pump 21, the pump suction pipeline LL, the pump idling protector or the connecting pipeline MM of the present invention, and the pump idling protector or the contacting part with the fluid of the present invention. Is included. The electric part includes the motor 20 and the power supply system 3, and the power supply part is connected by the electromagnetic circuit breaker (MCB). One end MS1 of the start control coil of the electromagnetic circuit breaker (this MS1 is a tentative for easy explanation). The name of the contact) and the T-phase power supply are directly conducted, the power supply of the contact MN1 at the other end is given from the power supply R, and the entire power supply circuit is delayed with the normally open contact MSA of the microswitch in the upper cover. The relay is instantly closed to the contact TM4, and the contact TM1 of the TM4 facing the relay is connected in parallel with the common point MSC of the coil of the delay relay and the microswitch, and then the power receiving input point of the external pump start switch SS0. It is circumscribed with SS2, and the operation relative point of S S2, that is, the power transmission output point SS1 is directly connected with the power source R. As can be seen from the above description, the coil that activates the electromagnetic circuit breaker that transmits electric power to the motor 20 is controlled by the R-phase power source, and the R-phase power source operates the circuit channels (SS1 and SS2) of the external activation switch S S0. After that, the circuit returns via the circuit channels of the delay relay TM (TM1 and TM4) or the circuit channels of the microswitch MSC (MSB and MSA). With this design, whether or not the motor 20 is started is determined by whether or not the delay relay TM or the power supply power supply circuit channel of the microswitch MSC is in communication. In other words, if the delay relay TM or the microswitch MSC already provides a channel for power circuit activation, the motor 20 operates to activate the pump 21 to transport fluid. If not, the motor 20 stops its operation because the starting power supply is interrupted. The concept of this kind of operation permission is at the core of the control of the present invention, and is the key point of protection of the pump 21 and the motor 20 according to the present invention. In order to smoothly perform this control, the operating parts which are related to control the power supply circuit channel are provided in the main body. The operation and control principles of the correlated operating parts and the pump slip protection device are explained below. The contact names such as MS0, CBU1 & CBU2, etc. shown in the figure are provided for the purpose of facilitating the explanation and for the purpose of display. In reality, all of them represent only one shared contact on the circuit and have a special meaning. Does not have.

FIGS. 3, 4, 5 and 6 are for explaining the relationship between the fluid tank, the pipeline, the motor 20, the foot valve, the pump 21 and the present invention, but it should be particularly explained. The arrangement of equipment in each figure is only for reference, and the arrangement shown in the figure is shown for convenience of explanation. In practical applications, many variations are possible, some combining different power supply controls, such as motor driven circuit breakers, pneumatically controlled pneumatic circuit breakers, and some extra equipment. Are controlled by various sensors, and each kind of power supply or motor 20 is automatically started at the critical set point to start the electric or mechanical device of the controller. However, there are many kinds and the wiring becomes complicated. However, the application is almost the same and not directly related to the part of the description of the present invention, and therefore the arrangement examples of FIGS. 3, 4, 5 and 6 are described.

Further, the power supply system is generally designed according to the difference in the environment of the use site, and there are, for example, single phase and three phase, and the voltage is 110V, 220V, 380V, 440V, 3000V, etc. There is a design that uses medium-voltage and high-voltage power. Therefore, in the general situation, when the voltage exceeds 220V, the control circuit (generally considered as a weak current part) is designed separately, and the voltage is stepped down by the transformer. There is no direct connection to an external power source (as in FIGS. 3, 4, 5 and 6) to form a control power source. Therefore, the purpose of FIGS. 3, 4, 5 and 6 is to clarify the operating principle of the present invention. In the actual operation, the actual wiring complies with the technology, rules, or laws relating to the safety of electric use. A hypothetical power usage pattern is shown in FIGS. 3, 4, 5, and 6 where three-phase, 220V, 60Hz commonly used power system electricity is used.

Further, FIG. 4 shows that when the pump is started to start the operation, it is connected by the contact of the delay relay to supply the operation start power to the electromagnetic circuit breaker, and the motor is supplied to the start-up pump 21 with the fluid. It shows the situation of transportation. Among them, the SS1 and SS2 contacts of the external pump start switch SS0 to which the R phase of the external power source is connected conducts, triggering the start coil of the delay relay TM installed in the upper cover of the pump idle protector, At the time of, the delay relay starts to operate, the momentary closing contacts TM1 and TM4 become conductive, the R-phase power source flows from SS1, SS2, TM1, TM4 to the MN1 contact of the electromagnetic circuit breaker MCB, and the other of the electromagnetic circuit breaker MCB. One contact MS1 is connected to the external power supply T-phase and maintains a normal state, whereby the electromagnetic circuit breaker MCB is activated, and U1 and U2, V1 and V2, and W1 and W2 that originally maintain a normally open state. Form a conductive state, the motor 20 acquires electric power from the outside, and causes the pump 21 to send fluid. However, the form of supplying power by activating this type of delay relay is just a temporary state. As shown in Fig. 5, if the pump 21 is already operating normally and the water level rises to trigger the microswitch, the delay relay TM1 and TM4 contacts will be turned on before the end of the delay relay timing. Switch contacts MSC and MSA form a parallel state to provide operating power to the electromagnetic circuit breaker. However, if the pump 21 cannot operate normally, the start circuits MSC and MSA controlled by the microswitch cannot be conducted, and the power is not received, that is, after the delay time expires, the power is supplied by the delay relay. It is interrupted by the disconnection of the momentary closing contacts TM1 and TM4 of the delay relay, the starting coil of the electromagnetic circuit breaker loses the starting power source and its magnetic field is interrupted, and the energizing contacts U1 and U2, V1 and V2 on the electromagnetic circuit breaker, and Both W1 and W2 come out of contact with each other, and at this time, the motor 20 loses its power supply and naturally stops its operation. The occurrence of this kind of situation is because there is a leak in the foot valve at the bottom end of the introduction pipeline LL stage of the pump, or the pipe of the introduction pipeline LL stage is ruptured, or the turbine of the pump 21 is damaged. Present, or because the pump 21 is started even though there is no fluid in the tank to be delivered, this type of situation is the subject of protection of the present invention.

FIG. 6 shows that under normal conditions of the pump transportation system, the float inside the main body of the pump slip protector floats up due to the rise of the liquid level of the fluid, and further pushes up the interlocking rod to trigger the micro switch, The figure shows the state where two power supply circuits are formed and the starting power is continuously supplied to the electromagnetic circuit breaker. As explained above, when the pump 21 is started, the delay relay instantaneous closing switches TM1 and TM4 become conductive, thereby providing the starting power to the electromagnetic circuit breaker, and if the pump 21 is in the state of fluid transportation. If all goes well, the fluid will be transported along the transport pipeline to the set point and at the same time will be pumped into the main body of the anti-slip protector body of the pump. Then, the float inside the main body rises as the fluid level rises, and after rising about 5 mm, it pushes up the interlocking rod that comes into contact with the elastic membrane piece and connects to the elastic membrane piece. , The float is not obstructed, and the interlocking rod is continuously pushed upward to push the microswitch start spring upward, and the common point MSC of the microswitch and the normally open contact MSA are electrically connected and stopped. At this time, the R-phase power supply is provided to the MN1 contact of the electromagnetic circuit breaker MCB from the circuit including SS1, SS2 and MSC, MSA, and the other contact MS1 of the electromagnetic circuit breaker MCB is connected to the external power supply T-phase. The normal state is maintained, so the electromagnetic circuit breaker MCB is activated, and U1 and U2, V1 and V2, and W1 and W2, which are originally in the normally open state, form a conductive state, and the motor 20 is externally connected. It continuously receives electric power and causes the pump 21 to continuously send fluid. However, to explain in this part, when the starting power of the pump 21 is started by the delay relay when the starting state of the pump 21 is started, the MSC and MS1 of the microswitch are also conducting, and at this time, the two power supplies are connected. The power of the circuits overlaps for a while, but the origin of these two circuits consists of R-phases, which are so-called parallel in electrical design and do not cause any disturbance to the power supply system. In addition, the main cabin of the main body and the float are not completely in close contact with each other, which prevents the fluid from coming into contact with the main cabin wall plate, which allows the fluid to enter the main cabin and then fill the main cabin. Yes, the pressure in each direction naturally becomes one equilibrium state, and even if air is present in the fluid, it is slightly compressed into the space on the upper left and right sides, so it does not affect the normal operation of the float.

In addition, if the pump 21 has a normal transportation work and the pump start switch is cut off, the pump export pipeline is filled with fluid and the float in the pump slip protector is continuously maintained. Then, press the start spring of the micro switch, and the power supplied to the electromagnetic circuit breaker maintains the normal conduction state in the MSA and MSC parts of the micro switch. This kind of situation is similar to the power supply system of the well-known general transportation pump, in which the pump slip protector becomes the normal contact of only one electromagnetic circuit breaker power supply power supply circuit. Next, when the pumping system is activated, the delay relay operates and its momentary closing contacts TM1 and TM4 become conductive, which causes a phenomenon in which the power supply circuits temporarily overlap. However, as mentioned above, this kind of situation only creates a parallel state on the power supply circuit and does not affect the power supply system itself.

[0016]

[Effect of the invention]

 The present invention provides a device at the rear of the pump on the pipeline for detecting the transport state of the fluid in the pipeline and monitoring the operating condition of the pump, so that the pump continuously idles in an anhydrous state. It is possible to prevent burnout and failure due to the operation of the pump, to automatically stop the power supply using the above device, and to prevent the pump from continuing to idle in an anhydrous state due to abnormal pipeline conditions. Preventing burning of pumps and motors and wasting power, and allowing repair personnel to directly judge abnormalities in the pump transportation pipeline.

[Brief description of the drawings]

FIG. 1 is an external perspective view of the present invention.

FIG. 2 is a structural sectional view of the present invention.

FIG. 3 is a layout view of a pump transportation system to which the present invention is attached, showing a state of each correlator when the pump transportation system is not in operation.

FIG. 4 is an operation display diagram of a pump transportation system to which the present invention is attached. When the pump is started and the operation is started, the contact of the delay relay is connected and the operation starting power is provided to the electromagnetic circuit breaker to start the motor. The pump is shown pumping fluid.

FIG. 5 is a diagram showing the operation of the pump transportation system equipped with the present invention, in which the pump is already operating normally, the water level rises, the micro switch is triggered, and the delay relay is timed before the timing of the delay relay ends. Instantaneous closing switch TM
1 and TM4 form a parallel state with the contacts MSC and MSA of the microswitch, and show a state in which operating power is supplied to the electromagnetic circuit breaker.

FIG. 6 is an operation display diagram of the pump transportation system to which the present invention is attached, in which the float inside the main body of the pump slip protector of the present invention floats up due to the liquid level rise, and further pushes up the interlocking rod to trigger the micro switch. , Shows the state of forming another power supply circuit and continuously supplying the electromagnetic circuit breaker starting power supply.

[Explanation of symbols]

 1 Upper Cover 2 Main Body 3 Lower Cover 4 Elastic Membrane Piece 5 Interlocking Rod 6 Interlocking Rod Guide Ring 7 Elastic Membrane Piece Fixing Ring 8 Flange 11 Foot Seat 12 Delay Relay 13 Delay Adjustment Knob 14 Micro Switch 15 Micro Switch Trigger Spring 16 Wiring Outlet 17 Buffer spring 18 Buffer chamber 19 Fluid inlet

Claims (1)

[Utility model registration claims] 1. A housing part is a top cover,
Comprising one body and one lower cover, the lower half part and the upper half part of the body are separated by an elastic membrane piece, the lower half part is in fluid contact, and the parts in the upper half part are in the upper half part. A micro switch that interacts with each other is provided, a flange is provided on the outer periphery of the upper portion of the main body, a channel is formed inside the middle stage, a water inlet is provided on one side of the bottom, and a buffer chamber is provided behind the water inlet. One float is installed in the channel of the main body, one elastic membrane piece is installed on the upper shoulder inside the main body, and the elastic membrane piece has a bowl shape and extends downward into the cabin of the main body. , A circular recess is provided in the center of the elastic membrane piece, and the elastic membrane piece is connected with the interlocking rod above it with a bolt, and the interlocking movement is arranged above the elastic membrane piece, with the large bottom and the small top. A rod is provided, and one fixing plate is provided above the elastic film piece. One interlocking rod guide ring is fitted in the center, the interlocking rod is vertically moved through the center hole of the interlocking rod guide ring, one spring is attached to the buffer chamber at the bottom of the main body, and one spring is attached from the bottom by the lower cover. The main body is fixed, and a connecting flange is separately provided outside the bottom end of the main body, and is connected to the flange of the upper cover of the main body and fixed with a bolt.
One micro switch and a delay relay are provided inside the upper cover, the micro switch is provided with a trigger spring, and a rotatable retaining ring is provided at the end of the trigger spring to make contact with the interlocking rod. A slip prevention protector for a pump, which is provided with an electrical connection port and is used for connection with an external circuit.