Automatic loading method and loading device for elevator load test

Abstract

The invention relates to the technical field of elevator load testing, in particular to an automatic loading method and device for an elevator load test.The automatic loading device comprises a folding water bag, weighing equipment, a three-position four-way electromagnetic directional valve, a water pump module and a controller circuit. The automatic loading method and device can achieve automatic loading and unloading of elevator loads, and are simple in structure, low in manufacturing cost, easy and convenient to operate and high in practicability. The device is simple in structure, high in efficiency, high in loading and unloading automation degree, capable of achieving random switching between manual loading and automatic loading, capable of monitoring the loading weight in real time and achieving overall metering, and insuspicion in accuracy of the loading weight. During loading and unloading, an operator only needs to enter and exit from the lift car when the water bag device is placed and removed in the lift car and the water conveying pipe is connected and removed, so that the danger that the operator frequently enters and exits from the lift car in the loading and unloading process and possibly causes shearing is effectively avoided, and the loading and unloading process is high in safety.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator load testing, and specifically to an automatic loading method and a loading device for elevator load tests. Background Art

[0002] During the installation, commissioning, inspection and testing of elevators, load tests need to be carried out to test and verify the performance of the elevators. Therefore, heavy objects are required to load the car. These heavy objects need to be transported near the landing doors and moved in and out of the car. Therefore, the single-piece weight of these heavy objects cannot be too heavy. Therefore, the loaded heavy objects are basically composed of many small pieces. This loading method has the following problems:

[0003] 1. To ensure the accuracy of the load, the weights of these heavy objects (except for standard weights) should be measured one by one. The measurement work is rather cumbersome. Therefore, in actual situations on site, estimation is basically adopted instead of measurement. Therefore, the accuracy of the loaded weight has to be questioned.

[0004] 2. Loading heavy objects into and out of the car has to be done manually piece by piece, which is labor-intensive, inefficient, and prone to damage the car floor and car walls. Moreover, before the elevator undergoes a load test, the reliability of its performance is unknown. If the elevator performance does not meet the expected requirements, it is very easy to have a run-away during the loading process, resulting in a serious accident of shearing for the operators getting in and out of the car. Moreover, there is an additional load during the loading process, which makes the actual load of the elevator exceed the expected loading amount, further increasing the risk of a run-away shearing accident. For example, when conducting a 125% load test on an elevator, when the elevator is loaded to 125% of the rated load, the loading personnel still need to get in and out of the car, which results in an additional load of the weight of a person and an impact load when the elevator load reaches 125% of the rated load. This load cannot be underestimated. Assuming the rated number of passengers of the elevator is 13, the weight of one person is 7.7% of the rated load. Therefore, when loaded to 125% of the rated load, its actual load reaches at least 132.7% of the rated load. Especially when the rated load of the elevator is relatively small, the percentage of the additional load is higher.

[0005] Therefore, the existing elevator load testing means are difficult to automatically and accurately control the load in addition to requiring manual operation. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide an automatic loading method and a loading device for elevator load tests to solve the technical problems in the background art.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] An automatic loading device for elevator load test of the present invention uses the automatic loading device for elevator load test to perform automatic loading of elevator load test. Among them, the automatic loading device for elevator load test includes:

[0009] A water storage tank;

[0010] A folding water bag, placed in the elevator for applying load to the elevator;

[0011] A weighing device, arranged below the folding water bag for collecting the real-time load of the folding water bag;

[0012] A three-position four-way electromagnetic directional valve, connected to the folding water bag and the weighing device through pipelines for switching the pipeline flow direction;

[0013] A water pump module, connected to the three-position four-way electromagnetic directional valve through pipelines for driving the water flow in the pipelines;

[0014] A controller circuit, connected to the weighing device, the three-position four-way electromagnetic directional valve, and the water pump module, for automatically controlling the three-position four-way electromagnetic directional valve and the water pump module according to the real-time load and the set target load range in the automatic mode, so that the real-time load is within the set target load range; or, for controlling the three-position four-way electromagnetic directional valve and the water pump module based on an externally input switch signal in the manual mode.

[0015] In an embodiment of the present application, the three-position four-way electromagnetic directional valve includes a first working end, a second working end, a third working end, and a fourth working end;

[0016] The water storage tank is connected to the first working end of the three-position four-way electromagnetic directional valve through a water pipe. The second working end of the three-position four-way electromagnetic directional valve is connected to the water inlet end of the water pump through a water pipe. The water outlet end of the water pump is connected to the third working end of the three-position four-way electromagnetic directional valve through a water pipe. The fourth working end of the three-position four-way electromagnetic directional valve is connected to the folding water bag through a water pipe;

[0017] When the first working end is communicated with the second working end and the third working end is communicated with the fourth working end, the water pump module drives the water in the water storage tank to flow to the folding water bag; when the second working end is communicated with the fourth working end and the first working end is communicated with the third working end, the water pump module drives the water in the folding water bag to flow to the water storage tank.

[0018] In an embodiment of the present application, the water pump module includes a water pump and an electric motor, and the power shaft of the electric motor is connected to the water pump for driving the water pump to operate.

[0019] In an embodiment of the present application, the controller circuit includes a main circuit, a water pump control circuit, a switching control circuit, and a PLC integrated controller;

[0020] The main circuit includes an inverter. The input side of the inverter is connected in series with a first manual switch and a second manual switch and then externally connected to a DC power supply. The output side of the inverter is connected in series with a first relay contact and then connected to the water pump module;

[0021] The water pump control circuit is connected to the main circuit and is used to control the working state of the water pump module;

[0022] The switching control circuit is connected to the main circuit and the PLC integrated controller and is used to control the working state of the three-position four-way electromagnetic directional control valve.

[0023] In an embodiment of the present application, the water pump control circuit includes a first relay coil for controlling the first relay contact, a motor start button, and a motor stop button;

[0024] One end of the first relay coil is sequentially connected in series with the motor start button and the motor stop button and then connected to the positive pole of an external DC power supply; the other end of the first relay coil is connected to the negative pole of the external DC power supply;

[0025] The motor start button is also connected in parallel with a first relay contact controlled by the first relay coil;

[0026] The motor start button is a normally open button, and the motor stop button is a normally closed button.

[0027] In an embodiment of the present application, the switching control circuit includes a loading electromagnet, an unloading electromagnet, a loading control electromagnet, and an unloading control electromagnet;

[0028] One end of the loading electromagnet is connected in series with a loading control contact and then connected to the positive pole of an external DC power supply, and the other end of the loading electromagnet is connected to the negative pole of the external DC power supply;

[0029] One end of the unloading electromagnet is connected in series with an unloading control contact and then connected to the positive pole of an external DC power supply, and the other end of the unloading electromagnet is connected to the negative pole of the external DC power supply;

[0030] One end of the loading control electromagnet is sequentially connected in series with the PLC integrated controller, a loading and unloading start button, and a loading and unloading stop button and then connected to the positive pole of the external DC power supply, and the other end of the loading control electromagnet is connected to the negative pole of the external DC power supply; the loading control electromagnet is used to control the on-off state of the loading control contact; the PLC integrated controller is used to control the on-off state of the branch where the loading control electromagnet is located;

[0031] One end of the load reduction control electromagnet is sequentially connected in series with the PLC integrated controller, the load increase / decrease start button, and the load increase / decrease stop button, and then connected to the positive pole of an external DC power supply. The other end of the load reduction control electromagnet is connected to the negative pole of the external DC power supply. The load reduction control electromagnet is used to control the on / off state of the load reduction control contact. The PLC integrated controller is used to control the on / off state of the branch where the load reduction control electromagnet is located.

[0032] The load increase / decrease start button is a normally open button, and the load increase / decrease stop button is a normally closed button. A second relay contact is also connected in parallel with the load increase / decrease start button. The second relay contact is controlled by a second relay coil. One end of the second relay coil is sequentially connected in series with the load increase / decrease start button and the load increase / decrease stop button, and then connected to the positive pole of the external DC power supply. The other end of one end of the second relay coil is connected to the negative pole of the external DC power supply.

[0033] In an embodiment of the present application, a load start button and a load reduction start button are further included.

[0034] The load start button includes a first normally open contact and a first normally closed contact that are synchronously locked. The first normally open contact is connected in series in the branch where the load electromagnet is located. The first normally closed contact is connected in series in the branch where the load reduction control electromagnet is located. One end of the load electromagnet is connected to one end of the load reduction control electromagnet.

[0035] The load reduction start button includes a second normally open contact and a second normally closed contact that are synchronously locked. The second normally open contact is connected in series in the branch where the load reduction electromagnet is located. The second normally closed contact is connected in series in the branch where the load reduction control electromagnet is located. One end of the load reduction electromagnet is connected to one end of the load reduction control electromagnet.

[0036] In an embodiment of the present application, the folding water bag includes a tray, a guide post provided at the center position of the tray, and a telescopic water bag sleeved on the guide post.

[0037] A quick-install check valve joint is provided on the telescopic water bag. The telescopic water bag is connected to a water pipe through the quick-install check valve joint.

[0038] In an embodiment of the present application, the following are further included:

[0039] Obtain the real-time load W exerted by the folding water bag on the elevator.

[0040] Compare the real-time load W with a set target load W0. When W < W0×X1 is satisfied, a load control signal is output. When W > W0×X2 is satisfied, a load reduction control signal is output. When W0×X1 ≤ W ≤ W0×X2 is satisfied, an interruption control signal is output, where X1 < X2.

[0041] In an embodiment of the present application, the load control signal controls the water pump module to start, and makes the first working end and the second working end of the three-position four-way electromagnetic reversing valve communicate, and the third working end and the fourth working end communicate;

[0042] The unloading control signal controls the water pump module to start, and makes the second working end and the fourth working end of the three-position four-way electromagnetic reversing valve communicate, and the first working end and the third working end communicate;

[0043] The interruption control signal controls the water pump module to close, and makes the three-position four-way electromagnetic reversing valve in the middle position.

[0044] The present application also provides an automatic loading device for elevator load test, including:

[0045] A water storage tank;

[0046] A folding water bag, placed in the elevator for applying a load to the elevator;

[0047] A weighing device, arranged below the folding water bag for collecting the real-time load of the folding water bag;

[0048] A three-position four-way electromagnetic reversing valve, connected to the folding water bag and the weighing device through pipelines for switching the pipeline flow direction;

[0049] A water pump module, connected to the three-position four-way electromagnetic reversing valve through a pipeline for driving the water flow in the pipeline;

[0050] A controller circuit, connected to the weighing device, the three-position four-way electromagnetic reversing valve, and the water pump module, for automatically controlling the three-position four-way electromagnetic reversing valve and the water pump module according to the real-time load and the set target load range in the automatic mode, so that the real-time load is within the set target load range; or, for controlling the three-position four-way electromagnetic reversing valve and the water pump module based on an externally input switch signal in the manual mode.

[0051] The beneficial effects of the present invention are as follows: An automatic loading method and loading device for elevator load test of the present invention include a folding water bag, a weighing device, a three-position four-way electromagnetic reversing valve, a water pump module, and a controller circuit. The present application can realize automatic loading and unloading of elevator loads, has a simple structure, low cost, simple operation, high efficiency, high degree of automation of loading and unloading, and can realize arbitrary switching between manual and automatic loading, real-time monitoring of the loading weight and overall measurement, and the accuracy of the loading weight is beyond doubt. During loading and unloading, only when the water bag device is placed and removed in the car, and the water supply pipe is connected and disconnected, the operator needs to enter and exit the car, effectively avoiding the possible danger of shearing caused by the operator frequently entering and exiting the car during the loading and unloading process, and the safety of the loading and unloading process is relatively high. Description of the Drawings

[0052] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0053] Figure 1 It is a schematic structural diagram of an automatic loading device for elevator load tests shown in an embodiment of the present application;

[0054] Figure 2 It is a cross-sectional view of a collapsible water bag in an embodiment of the present application;

[0055] Figure 3 It is a schematic structural diagram of the collapsible water bag in the empty water state in an embodiment of the present application;

[0056] Figure 4 It is a schematic structural diagram of the collapsible water bag in the full water state in an embodiment of the present application;

[0057] Figure 5 It is a circuit structure diagram of a controller circuit in an embodiment of the present application;

[0058] The reference signs are:

[0059] 1 - water storage tank;

[0060] 2 - collapsible water bag, 21 - tray, 22 - guide post, 23 - telescopic water bag, 24 - quick - fitting check valve joint;

[0061] 3 - weighing device;

[0062] 4 - three - position four - way electromagnetic directional control valve;

[0063] 5 - water pump;

[0064] 6 - electric motor. Detailed implementation manners

[0065] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0066] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the layers related to the present invention are shown in the drawings, rather than being drawn according to the number, shape, and size of the layers in actual implementation. The type, quantity, and ratio of each layer in actual implementation can be an arbitrary change, and the layer layout type may also be more complex.

[0067] In the following description, numerous details are explored to provide a more thorough explanation of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the embodiments of the present invention can be implemented without these specific details.

[0068] An automatic loading method for elevator load tests in this application relies on an automatic loading device for elevator load tests in this application to execute. Figure 1 It is a schematic structural diagram of an automatic loading device for elevator load tests shown in an embodiment of this application. As Figure 1 shown, an automatic loading device for elevator load tests in this embodiment includes a water storage tank 1, a collapsible water bag 2, a weighing device 3, a three-position four-way electromagnetic reversing valve 4, a water pump module, and a controller circuit. The specific connection relationship and principle are as follows:

[0069] The water storage tank 1 is used to store the load medium: water. In this application, the water storage tank 1 is a vehicle-mounted water storage tank.

[0070] The collapsible water bag 2 is placed in the elevator and is used to apply a load to the elevator;

[0071] Figure 2 It is a cross-sectional view of the collapsible water bag in an embodiment of this application. As Figure 2 shown, the collapsible water bag 2 includes a tray 21, a guide post 22 provided at the center position of the tray, and a telescopic water bag 23 sleeved on the guide post 22;

[0072] The telescopic water bag 2 is provided with a quick-connect check valve joint 24, and the telescopic water bag 2 is connected to a water pipe through the quick-connect check valve joint 24.

[0073] Figure 3 It is a schematic structural diagram of the collapsible water bag in the empty water state in an embodiment of this application. Figure 4 It is a schematic structural diagram of the collapsible water bag in the full water state in an embodiment of this application. As Figure 3 - Figure 4 shown, when loading or unloading, the telescopic water bag 2 moves along the guide post 22, so that the overall collapsible water bag 2 is more stable.

[0074] The weighing device 3 is arranged below the collapsible water bag and is used to collect the real-time load of the collapsible water bag;

[0075] The three-position four-way electromagnetic reversing valve 4 is connected to the collapsible water bag 2 and the weighing device 3 through pipelines and is used to switch the pipeline flow direction;

[0076] In this embodiment, the three-position four-way electromagnetic reversing valve 4 includes a first working end A, a second working end C, a third working end D, and a fourth working end B;

[0077] The water storage tank 1 is connected to the first working end A of the three-position four-way electromagnetic reversing valve 4 through a water pipe. The second working end C of the three-position four-way electromagnetic reversing valve 4 is connected to the water inlet end of the water pump 5 through a water pipe. The water outlet end of the water pump 5 is connected to the third working end D of the three-position four-way electromagnetic reversing valve 4 through a water pipe. The fourth working end B of the three-position four-way electromagnetic reversing valve 4 is connected to the folded water bladder through a water pipe; during use, the hose of the quick-connect check valve joint 24 is used to connect the water bladder to the fourth working end B on the electromagnetic reversing valve.

[0078] When the first working end A is connected to the second working end B and the third working end C and the fourth working end D are connected, the water pump module drives the water in the water storage tank 1 to flow towards the folded water bladder 2;

[0079] When the second working end C and the fourth working end B are connected and the first working end A is connected to the third working end D, the water pump module drives the water in the folded water bladder 2 to flow towards the water storage tank 1.

[0080] The three-position four-way electromagnetic reversing valve 4 includes three working states, namely the loading state, the unloading state, and the stop state. The three working states are determined by the position of the magnetic core inside. When there is no external electromagnet attraction, the magnetic core is in the middle position, and at this time, the three-position four-way electromagnetic reversing valve 4 is in the stop state. When the loading electromagnet TU generates a magnetic field, the magnetic core is attracted to the first position, so that the first working end A is connected to the second working end B and the third working end C and the fourth working end D are connected. At this time, the water can only flow from the water storage tank 1 into the folding water bladder 2, and the system is in the loading state. When the unloading electromagnet TD generates a magnetic field, the magnetic core is attracted to the second position. At this time, the second working end C and the fourth working end B are connected and the first working end A is connected to the third working end D. At this time, the water can only flow from the folding water bladder 2 into the water storage tank 1, and the system is in the unloading state.

[0081] Therefore, the core of this application is how to control the loading state and the unloading state of the system, and the control logic is as follows in the controller circuit.

[0082] The water pump module is connected to the three-position four-way electromagnetic reversing valve through a pipeline and is used to drive the water flow in the pipeline;

[0083] The water pump module includes a water pump 5 and an electric motor 6. The power shaft of the electric motor 6 is connected to the water pump 5 to drive the water pump 5 to operate.

[0084] The working principle of the elevator load test automatic loading system is as follows:

[0085] During use, the hose of the quick-connect check valve joint 24 is used to connect the folded water bladder 2 to the B interface on the three-position four-way electromagnetic reversing valve 4;

[0086] When the load addition and subtraction is not started, the three-position four-way electromagnetic reversing valve 4 is in the stop position. At this time, the water storage tank 1, the water inlet of the water pump 5, and the water outlet of the water pump 5 are interconnected. If the motor 6 is in the running state, the water in the water pump 5 can form a no-load internal circulation. Therefore, the motor can be in the running state during the load addition and subtraction process, and there is no need to frequently start and stop the motor.

[0087] After connecting the water pipe, turn on the weighing device 3, turn on the automatic load control system, and start the motor 6 of the water pump 5. After the data transmission between the weighing device 3 and the automatic load control system is normal, the load addition and subtraction operation can be implemented.

[0088] Before starting the load addition and subtraction, set the target load W0 for loading in the load control system (when the water in the water bag needs to be recovered, the target load W0 is set as: W0 = G0 + △, where △ is the water bag tray, the water bag, and the remaining water that cannot be recovered).

[0089] Then, start the load addition and subtraction control button to achieve automatic load addition and subtraction. When it is detected that the current load (W = G0 + G) is the set target load W0, the load addition and subtraction automatically ends. After the load addition and subtraction ends, the connecting hose between the water bag and the electromagnetic reversing valve can be removed. Since the pipe joint uses a quick-install check valve joint, it can be quickly installed and disassembled, and the water in the two ends of the interface will not flow out after disassembly, so that the load of the water bag can be maintained, and the corresponding load test of the elevator can be carried out or the water bag can be removed from the car.

[0090] The automatic load addition and subtraction control logic is as follows: when the control system determines that W < W0 × 98%, the control system automatically controls the electromagnetic reversing valve to push the valve core to the loading position, and the water in the water tank passes through the interface A → C → water inlet of the water pump → water outlet of the water pump → D → B → water bag of the electromagnetic reversing valve to realize water injection and loading; when the control system determines that W > W0 × 102%, the control system automatically controls the electromagnetic reversing valve to push the valve core to the unloading position, and the water in the water bag passes through the interface B → C → water inlet of the water pump → water outlet of the water pump → D → A → water tank of the electromagnetic reversing valve to realize water collection and unloading; when the control system determines that W0 × 98% ≤ W ≤ W0 × 102%, the control system automatically controls the electromagnetic reversing valve to push the valve core to the stop position to stop the load addition and subtraction.

[0091] The controller circuit is connected to the weighing device, the three-position four-way electromagnetic reversing valve, and the water pump module, and is used to automatically control the three-position four-way electromagnetic reversing valve and the water pump module according to the real-time load and the set target load range in the automatic mode, so that the real-time load is within the set target load range; or, it is used to control the three-position four-way electromagnetic reversing valve and the water pump module based on the externally input switch signal in the manual mode.

[0092] To implement the above functions, the following controller circuit structure is required. Figure 5 This is the circuit structure diagram of the controller circuit in an embodiment of the present application, asFigure 5 As shown, the controller circuit includes a main circuit, a water pump control circuit, a switching control circuit, and a PLC integrated controller;

[0093] The main circuit includes an inverter NBQ. The input side DC (direct current side) of the inverter NBQ is connected in series with a first manual switch K1 and a second manual switch K2 and then externally connected to a DC power supply DC. The output side AC of the inverter NBQ is connected in series with a first relay contact KMD and then connected to a motor MD;

[0094] The water pump control circuit is connected to the main circuit and is used to control the working state of the water pump module;

[0095] The switching control circuit is connected to the main circuit and the PLC integrated controller and is used to control the working state of the three-position four-way electromagnetic directional valve 4.

[0096] The water pump control circuit includes a first relay coil KMD for controlling the first relay contact KMD, a motor start button ADQ, and a motor stop button ADT;

[0097] One end of the first relay coil KMD is sequentially connected in series with the motor start button ADQ and the motor stop button ADT and then connected to the positive pole DC+ of the external DC power supply; the other end of the first relay coil KMD is connected to the negative pole DC- of the external DC power supply;

[0098] The motor start button ADQ is also connected in parallel with a first relay contact KMD controlled by the first relay coil KMD;

[0099] The motor start button ADQ is a normally open button, and the motor stop button ADT is a normally closed button.

[0100] The switching control circuit includes a loading electromagnet TU, a unloading electromagnet TD, a loading control electromagnet KTU, and a unloading control electromagnet KTD;

[0101] One end of the loading electromagnet TU is connected in series with a loading control contact KTU and then connected to the positive pole DC+ of the external DC power supply, and the other end of the loading electromagnet TU is connected to the negative pole DC- of the external DC power supply;

[0102] One end of the unloading electromagnet TD is connected in series with a unloading control contact KTD and then connected to the positive pole DC+ of the external DC power supply, and the other end of the unloading electromagnet TD is connected to the negative pole DC- of the external DC power supply;

[0103] One end of the load control electromagnet KTU is sequentially connected in series with a PLC integrated controller, a load increase / decrease start button ATQ, and a load increase / decrease stop button ATT, and then connected to the positive pole DC+ of an external DC power supply. The other end of the load control electromagnet KTU is connected to the negative pole DC- of the external DC power supply. The load control electromagnet KTU is used to control the on / off state of the load control contact KTU. The PLC integrated controller is used to control the on / off state of the branch where the load control electromagnet KTU is located.

[0104] One end of the unloading control electromagnet KTD is sequentially connected in series with a PLC integrated controller, a load increase / decrease start button ATQ, and a load increase / decrease stop button ATT, and then connected to the positive pole DC+ of an external DC power supply. The other end of the unloading control electromagnet KTD is connected to the negative pole DC- of the external DC power supply. The unloading control electromagnet KTD is used to control the on / off state of the unloading control contact KTD. The PLC integrated controller is used to control the on / off state of the branch where the unloading control electromagnet KTD is located.

[0105] The load increase / decrease start button is a normally open button ATQ, and the load increase / decrease stop button ATT is a normally closed button. The load increase / decrease start button ATQ is also connected in parallel with a second relay contact KT. The second relay contact KT is controlled by a second relay coil KT. One end of the second relay coil KT is sequentially connected in series with the load increase / decrease start button ATQ and the load increase / decrease stop button ATT, and then connected to the positive pole DC+ of the external DC power supply. The other end of one end of the second relay coil KT is connected to the negative pole DC- of the external DC power supply.

[0106] In addition, it also includes a load start button ATU and an unloading start button ATD;

[0107] The load start button ATU includes a first normally open contact and a first normally closed contact that are synchronously locked. The first normally open contact is connected in series in the branch where the load electromagnet TU is located, and the first normally closed contact is connected in series in the branch where the load control electromagnet KTU is located. One end of the load electromagnet TU is connected to one end of the load control electromagnet KTU.

[0108] The unloading start button ATD includes a second normally open contact and a second normally closed contact that are synchronously locked. The second normally open contact is connected in series in the branch where the unloading electromagnet TD is located, and the second normally closed contact is connected in series in the branch where the unloading control electromagnet KTD is located. One end of the unloading electromagnet TD is connected to one end of the unloading control electromagnet KTD.

[0109] Based on the above circuit structure, its operating principle is as follows:

[0110] 1. After the loading device is ready, turn on the weighing instrument on the load carrier, and turn on the main power switch K1 of the electrical control system and the water pump power switch K2;

[0111] 2. The DC power supply DC on the motor vehicle enables the PCL integrated controller in the electrical control system to be powered on and work through K1. The weighing instrument monitors the weight G and can transmit it to the PCL integrated controller in the electrical control system in real time through wired or wireless transmission. The PCL integrated controller can calculate the current load W = G + G0 in real time and display it.

[0112] 3. The PCL integrated controller can set the target load W0 to be loaded.

[0113] 4. The PCL integrated controller can output the switch signals KU and KD in real time according to the following rules by comparing W and W0:

[0114] When W < 98%×W0, KU closes and KD opens.

[0115] When W > 102%×W0, KU opens and KD closes.

[0116] When 98%×W0 ≤ W ≤ 102%×W0, KU opens and KD opens.

[0117] 5. The DC power supply DC on the motor vehicle enables the NBQ in the electrical control system to be powered on and work through K1 and K2, and outputs AC alternating current. The alternating current is applied to the normally open contact of the KMD contactor, making the motor MD in a pending running state.

[0118] 6. When the ADQ button is pressed, the circuit +→K1→1→ADT→2→ADQ→3→KMD→12→K1→ - conducts, then KMD is attracted, and the motor MD is powered on and runs. The conduction of the circuit 2→KMD→3 shields the button ADQ, making the circuit +→K1→1→ADT→2→KMD→3→KMD→12→K1→ - continuously conduct, maintaining the continuous attraction of KMD; when the ADT button is pressed, the circuit +→K1→1→ADT→2→KMD→3→KMD→12→K1→ - is interrupted, then KMD is released, and the motor MD loses power and stops.

[0119] 7. When the ATQ button is pressed, the circuit +→K1→1→ATT→4→ATQ→5→KT→12→K1→ - conducts, then KT is attracted, starting the automatic loading function. The conduction of the circuit 4→KT→5 shields the button ATQ, making the circuit +→K1→1→ATT→4→KT→5→KT→12→K1→ - continuously conduct, maintaining the continuous attraction of KT; when the ATT button is pressed, the circuit +→K1→1→ATT→4→KT→5→KT→12→K1→ - is interrupted, then KT is released, stopping the automatic loading function.

[0120] 8. When in the case of W < W0 × 98% (at this time, KU is closed and KD is open), the automatic loading function is started. The circuit +→K1→1→ATT→4→ATQ→5→KU→ATU→6→KTD→KTU→12→K1→- is conducted, then KTU is attracted, and the circuit 6→KTU→TU→12 is conducted, then TU is attracted to make the electromagnetic directional valve in the loading state to achieve automatic loading. When loaded to W0 × 98% ≤ W ≤ W0 × 102%, both KU and KD are open, then both KTU and TU are released to make the electromagnetic directional valve switch to the stop loading state and the automatic loading is completed;

[0121] 9. When in the case of W > W0 × 102% (at this time, KU is open and KD is closed), the automatic loading function is started. The circuit +→K1→1→ATT→4→ATQ→5→KD→ATD→7→KTU→11→KTD→12→K1→- is conducted, then KTD is attracted, and the circuit 7→KTD→10→TD→12 is conducted, then TD is attracted to make the electromagnetic directional valve in the unloading state to achieve automatic unloading. When unloaded to W0 × 98% ≤ W ≤ W0 × 102%, both KU and KD are open, then both KTD and TD are released to make the electromagnetic directional valve switch to the stop unloading state and the automatic unloading is completed;

[0122] 10. When in the case of W0 × 98% ≤ W ≤ W0 × 102% (at this time, both KU and KD are open), the automatic loading function is started, then KTU, KTD, TU, and TD will not be attracted, and the electromagnetic directional valve continues to be in the stop loading state without loading or unloading

[0123] 11. When the automatic loading function is not started, when the ATU button is continuously pressed, the circuit +→K1→1→ATU→6→KTD→KTU→12→K1→- is conducted, then KTU is attracted, and the circuit 6→KTU→TU→12 is conducted, then TU is attracted to make the electromagnetic directional valve in the loading state to achieve manual loading. When the ATU button is released, then both KTU and TU are released to make the electromagnetic directional valve switch to the stop loading state and the manual loading stops;

[0124] 12. When the automatic loading function is not started, when the ATD button is continuously pressed, the circuit +→K1→1→ATD→7→KTU→KTD→12→K1→- is conducted, then KTD is continuously attracted, and the circuit 7→KTD→TD→12 is conducted, then TD is attracted to make the electromagnetic directional valve in the unloading state to achieve manual unloading. When the ATD button is released, then both KTD and TD are released to make the electromagnetic directional valve switch to the stop loading state and the manual loading stops.

[0125] This application also provides an automatic loading method for elevator load tests, including the steps of:

[0126] Obtaining the real-time load W applied by the folding water bag to the elevator;

[0127] Compare the real-time load W with the set target load W0; when W < W0×X1 is satisfied, output a loading control signal; when W > W0×X2 is satisfied, output a load reduction control signal; when W0×X1 ≤ W ≤ W0×X2 is satisfied, output an interruption control signal, where X1 < X2. X1 = 98%, X2 = 102%.

[0128] In an embodiment of the present application, the loading control signal controls the water pump module to start, and makes the first working end and the second working end of the three-position four-way electromagnetic reversing valve communicate, and the third working end and the fourth working end communicate;

[0129] The load reduction control signal controls the water pump module to start, and makes the second working end and the fourth working end of the three-position four-way electromagnetic reversing valve communicate, and the first working end and the third working end communicate;

[0130] The interruption control signal controls the water pump module to close, and makes the three-position four-way electromagnetic reversing valve in the middle position.

[0131] An automatic loading device for elevator load test of the present invention includes a folding water bag, a weighing device, a three-position four-way electromagnetic reversing valve, a water pump module and a controller circuit,

[0132] This application can realize automatic loading and unloading of elevator loads, with a simple structure, low cost, easy operation, high efficiency, high degree of automation in loading and unloading, and can realize arbitrary switching between manual and automatic loading, real-time monitoring of the loading weight and overall measurement, and the accuracy of the loading weight is beyond doubt.

[0133] During loading and unloading, only when the operator places and removes the water bag device in the car and connects and disconnects the water pipe, the operator needs to enter and exit the car, effectively avoiding the possible danger of shearing caused by the operator frequently entering and exiting the car during the loading and unloading process, and the safety of the loading and unloading process is relatively high.

[0134] There is no frequent moving of heavy objects in and out of the car, avoiding damage to the car floor and car wall.

[0135] Water can be reused, reducing the labor of carrying weights and the test cost is low.

[0136] Using a hose to transport water is not restricted by the transportation road, as long as a motor vehicle can transport the water tank near the elevator.

[0137] The water bag in the load carrier designed by the loading system adopts a central guiding column, which not only solves the problem of the stable placement of the water bag without tilting and pressing the car wall, but also solves the problem of avoiding using a large outer frame to maintain the stability of the water bag. After unloading, the load carrier does not need to be disassembled and is light and small, facilitating placement, evacuation, handling and vehicle transportation. Therefore, this load carrier has strong practicability.

[0138] In the above embodiments, although the present invention has been described in conjunction with specific embodiments of the present invention, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. Embodiments of the present invention are intended to cover all such alternatives, modifications, and variations that fall within the broad scope of the appended claims.

[0139] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those of ordinary skill in the art within the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An automatic loading method for elevator load tests, characterized in that, Including: Performing automatic loading of an elevator load test by using an automatic loading device for elevator load tests, wherein the automatic loading device for elevator load tests includes: A water storage tank (1); A collapsible water bag (2), placed in the elevator for applying a load to the elevator; A weighing device (3), arranged below the collapsible water bag for collecting the real-time load of the collapsible water bag; A three-position four-way electromagnetic directional control valve (4), connected to the collapsible water bag (2) and the weighing device (3) through pipelines for switching the pipeline flow direction; A water pump module, connected to the three-position four-way electromagnetic directional control valve (4) through a pipeline for driving the water flow in the pipeline; A controller circuit, connected to the weighing device (3), the three-position four-way electromagnetic directional control valve (4), and the water pump module, for automatically controlling the three-position four-way electromagnetic directional control valve (4) and the water pump module according to the real-time load and the set target load range in the automatic mode so that the real-time load is within the set target load range; or, for controlling the three-position four-way electromagnetic directional control valve (4) and the water pump module based on an externally input switch signal in the manual mode.

2. The automatic loading method for elevator load test according to claim 1, wherein The three-position four-way electromagnetic directional control valve (4) includes a first working end, a second working end, a third working end, and a fourth working end; The water storage tank (1) is connected to the first working end of the three-position four-way electromagnetic directional control valve (4) through a water pipe, the second working end of the three-position four-way electromagnetic directional control valve (4) is connected to the water inlet end of the water pump module through a water pipe, the water outlet end of the water pump module is connected to the third working end of the three-position four-way electromagnetic directional control valve (4) through a water pipe, and the fourth working end of the three-position four-way electromagnetic directional control valve (4) is connected to the collapsible water bag through a water pipe; When the first working end is communicated with the second working end and the third working end is communicated with the fourth working end, the water pump module drives the water flow in the water storage tank (1) to flow towards the collapsible water bag (2); when the second working end is communicated with the fourth working end and the first working end is communicated with the third working end, the water pump module drives the water flow in the collapsible water bag (2) to flow towards the water storage tank (1); The water pump module includes a water pump (5) and an electric motor (6), and the power shaft of the electric motor (6) is connected to the water pump (5) for driving the water pump (5) to operate.

3. The automatic loading method for elevator load test according to claim 1, characterized in that, The controller circuit includes a main circuit, a water pump control circuit, a switching control circuit, and a PLC integrated controller; The main circuit includes an inverter, the input side of the inverter is connected in series with a first manual switch and a second manual switch and then externally connected to a DC power supply, and the output side of the inverter is connected in series with a first relay contact and then connected to the water pump module; The water pump control circuit is connected to the main circuit for controlling the working state of the water pump module; The switching control circuit is connected to the main circuit and the PLC integrated controller for controlling the working state of the three-position four-way electromagnetic directional control valve (4).

4. The automatic loading method for elevator load test according to claim 3, characterized in that, The water pump control circuit includes a first relay coil for controlling the first relay contact, a motor start button, and a motor stop button; One end of the first relay coil is sequentially connected in series with a motor start button and a motor stop button and then connected to the positive pole of an external DC power supply; the other end of the first relay coil is connected to the negative pole of the external DC power supply; The motor start button is also connected in parallel with a first relay contact controlled by the first relay coil; The motor start button is a normally open button, and the motor stop button is a normally closed button.

5. The automatic loading method for elevator load test according to claim 3, characterized in that, The switching control circuit includes a loading electromagnet, a unloading electromagnet, a loading control electromagnet, and a unloading control electromagnet; One end of the loading electromagnet is connected to the positive pole of the external DC power supply after being connected in series with a loading control contact, and the other end of the loading electromagnet is connected to the negative pole of the external DC power supply; One end of the unloading electromagnet is connected to the positive pole of the external DC power supply after being connected in series with a unloading control contact, and the other end of the unloading electromagnet is connected to the negative pole of the external DC power supply; One end of the loading control electromagnet is sequentially connected in series with the PLC integrated controller, a loading / unloading start button, and a loading / unloading stop button and then connected to the positive pole of the external DC power supply, and the other end of the loading control electromagnet is connected to the negative pole of the external DC power supply; the loading control electromagnet is used to control the switching state of the loading control contact; the PLC integrated controller is used to control the on / off state of the branch where the loading control electromagnet is located; One end of the unloading control electromagnet is sequentially connected in series with the PLC integrated controller, a loading / unloading start button, and a loading / unloading stop button and then connected to the positive pole of the external DC power supply, and the other end of the unloading control electromagnet is connected to the negative pole of the external DC power supply; the unloading control electromagnet is used to control the switching state of the unloading control contact; the PLC integrated controller is used to control the on / off state of the branch where the unloading control electromagnet is located; The loading / unloading start button is a normally open button, the loading / unloading stop button is a normally closed button, the loading / unloading start button is also connected in parallel with a second relay contact, the second relay contact is controlled by a second relay coil, one end of the second relay coil is sequentially connected in series with the loading / unloading start button and the loading / unloading stop button and then connected to the positive pole of the external DC power supply, and the other end of one end of the second relay coil is connected to the negative pole of the external DC power supply.

6. The automatic loading method for elevator load test according to claim 5, characterized in that, It also includes a loading start button and a unloading start button; The loading start button includes a first normally open contact and a first normally closed contact that are synchronously locked. The first normally open contact is connected in series in the branch where the loading electromagnet is located, the first normally closed contact is connected in series in the branch where the loading control electromagnet is located, and one end of the loading electromagnet is connected to one end of the loading control electromagnet; The unloading start button includes a second normally open contact and a second normally closed contact that are synchronously locked. The second normally open contact is connected in series in the branch where the unloading electromagnet is located, the second normally closed contact is connected in series in the branch where the unloading control electromagnet is located, and one end of the unloading electromagnet is connected to one end of the unloading control electromagnet.

7. An automatic loading method for elevator load tests according to claim 1, characterized in that The folding water bag (2) includes a tray (21), a guide post (22) arranged at the center position of the tray, and a telescopic water bag (23) sleeved on the guide post (22); A quick-connect check valve joint (24) is provided on the telescopic water bag (23), and the telescopic water bag (23) is connected to a water pipe through the quick-connect check valve joint.

8. An automatic loading method for elevator load test according to claim 1, characterized in that, It is characterized in that it further includes: Obtaining the real-time load W exerted by the folded water bag on the elevator; Comparing the real-time load W with a set target load W0; when W < W0×X1 is satisfied, an output load control signal is output; when W > W0×X2 is satisfied, a load reduction control signal is output; when W0×X1 ≤ W ≤ W0×X2 is satisfied, an interruption control signal is output, where X1 < X2.

9. The automatic loading method for elevator load test according to claim 1, characterized in that, The load control signal controls the water pump module to start, and makes the first working end and the second working end of the three-position four-way electromagnetic reversing valve communicate, and the third working end and the fourth working end communicate; The load reduction control signal controls the water pump module to start, and makes the second working end and the fourth working end of the three-position four-way electromagnetic reversing valve communicate, and the first working end and the third working end communicate; The interruption control signal controls the water pump module to close, and makes the three-position four-way electromagnetic reversing valve in the middle position.

10. An automatic loading device for elevator load test, characterized in that, It includes: A water storage tank (1); A folded water bag (2), placed in the elevator for applying a load to the elevator; A weighing device (3), arranged below the folded water bag for collecting the real-time load of the folded water bag; A three-position four-way electromagnetic reversing valve (4), connected to the folded water bag (2) and the weighing device (3) through pipelines for switching the pipeline flow direction; A water pump module, connected to the three-position four-way electromagnetic reversing valve (4) through a pipeline for driving the water flow in the pipeline; A controller circuit, connected to the weighing device (3), the three-position four-way electromagnetic reversing valve (4), and the water pump module, for automatically controlling the three-position four-way electromagnetic reversing valve (4) and the water pump module according to the real-time load and the set target load range in the automatic mode, so that the real-time load is within the set target load range; or, for controlling the three-position four-way electromagnetic reversing valve (4) and the water pump module based on an externally input switch signal in the manual mode.

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