Lift car overload protection test device

Abstract

The utility model belongs to the technical field of elevator detection, and particularly relates to a lift car overload protection test device, which comprises a transfer bottom plate, a hydraulic pump, a hydraulic cylinder, a pressure sensor and an oil guide pipe, the top end of the transfer bottom plate is fixedly connected with a fixed seat, a lower pressing plate is arranged above the transfer bottom plate, a plurality of positioning plates are arranged below the lower pressing plate in a sliding manner, and the oil guide pipe is connected with the hydraulic pump. The top ends of the multiple positioning plates are fixedly connected with extension bases, the multiple extension bases are slidably connected to the interior of the lower pressing plate, a mounting top plate is arranged above the lower pressing plate, an extension plate is slidably connected to the interior of the mounting top plate, and one side of the extension plate is fixedly connected with a clamping base; through the cooperation of the lower pressing plate, the positioning plate and other parts, when a lift car overload protection test is carried out, the work that a worker carries heavy objects back and forth can be omitted, the pressure applying position can be freely adjusted according to the size of the lift car, the lift car is evenly stressed, and the accuracy of an experiment result is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of elevator detection, and particularly relates to a car overload protection test device. Background Art

[0002] The car overload protection system is one of the important guarantee measures for the safe operation of elevators. The weight sensor installed at the bottom of the car will monitor the total weight in the car in real time. When the weight reaches the threshold value, the control system will immediately take a series of measures, such as preventing the elevator door from closing, giving an audible and visual alarm to remind passengers of overload, prohibiting the elevator from starting or continuing to run, etc., to ensure the safe operation of the elevator. In order to test whether the car overload protection system can operate normally, the staff needs to simulate the overload situation. At present, the simulation is generally carried out by gradually loading weights or heavy objects into the car until the overload threshold is reached or exceeded. This method not only requires the staff to carry the heavy objects back and forth, increasing the labor intensity, but also when the heavy objects are carried into the car, it is easy to occur the situation of uneven placement, resulting in uneven force on the weight sensor or misjudgment of local overload, etc., which affects the test results. Content of the Utility Model

[0003] The utility model provides a car overload protection test device, which has the characteristics that when conducting an overload protection test on an elevator, the operation of the staff carrying heavy objects back and forth can be omitted, and the pressure application position can be adjusted according to the size of the car to ensure the accuracy of the test results.

[0004] The utility model provides the following technical solutions: including a transfer bottom plate, a hydraulic pump, a hydraulic cylinder, a pressure sensor, and an oil guide pipe. A fixed seat is fixedly connected to the top end of the transfer bottom plate. A lower pressure plate is arranged above the transfer bottom plate. A plurality of positioning plates slide below the lower pressure plate. Extension seats are fixedly connected to the top ends of the plurality of positioning plates. The plurality of extension seats are all slidably connected inside the lower pressure plate. An installation top plate is arranged above the lower pressure plate. An elongation plate is slidably connected inside the installation top plate. A clamping seat is fixedly connected to one side of the elongation plate. The hydraulic pump is installed at the top end of the installation top plate. The hydraulic cylinder is installed at the bottom end of the hydraulic pump. The pressure sensor is installed at the bottom end of the hydraulic cylinder. The hydraulic pump and the hydraulic cylinder are connected through the oil guide pipe. A pressure application plate is fixedly connected to the bottom end of the pressure sensor.

[0005] Wherein, a plurality of rotating wheels are rotatably connected to the bottom end of the transfer bottom plate. A push rod is fixedly connected to one side of the transfer bottom plate.

[0006] Wherein, an extension seat is fixedly connected to the bottom end of the lower pressure plate. The extension seat slides inside the fixed seat.

[0007] Among them, a number of guiding grooves are formed inside the lower pressing plate, and a number of the extension seats respectively slide inside the a number of guiding grooves, and scales are provided at the tops of the a number of extension seats.

[0008] Among them, a connecting rod is fixedly connected to the top end of the lower pressing plate, an adjusting rod is slidably connected inside the connecting rod, and the adjusting rod is fixedly connected to the bottom end of the mounting top plate.

[0009] Among them, [the specific content is missing in the original Chinese, so it cannot be accurately translated] is formed inside the mounting top plate, and the extension plate is connected to the inside of the mounting top plate through [the specific connection method is missing in the original Chinese, so it cannot be accurately translated].

[0010] The beneficial effects of the present utility model are as follows: Through the cooperation of components such as the lower pressing plate and the positioning plate, when conducting the overloading protection test of the car, not only can the work of the staff carrying heavy objects back and forth be saved, but also the pressing position can be freely adjusted according to the size of the car, so that the car is evenly stressed to ensure the accuracy of the test results.

[0011] Parts not involved in this device are the same as the prior art or can be implemented by using the prior art. Description of the Drawings

[0012] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0013] Figure 2 is a state schematic diagram when the present utility model is in use;

[0014] Figure 3 is a three-dimensional structural schematic diagram of the mounting top plate in the present utility model;

[0015] Figure 4 is Figure 2 an enlarged schematic diagram of part A in

[0016] In the figure: 1, transfer bottom plate; 11, fixed seat; 12, runner; 13, push rod; 2, lower pressing plate; 21, positioning plate; 22, extension seat; 23, expansion seat; 24, guiding groove; 25, scale; 3, mounting top plate; 31, extension plate; 32, clamping seat; 33, connecting rod; 34, adjusting rod; 35, guiding groove; 4, hydraulic pump; 41, hydraulic cylinder; 42, pressure sensor; 43, oil guiding pipe; 44, pressing plate. Detailed Embodiment

[0017] Please refer to Figures 1-4, the present utility model provides the following technical solutions: It includes a transfer base plate 1, a hydraulic pump 4, a hydraulic cylinder 41, a pressure sensor 42, and a guide oil pipe 43. A fixed seat 11 is fixedly connected to the top end of the transfer base plate 1. A lower pressing plate 2 is provided above the transfer base plate 1. A plurality of positioning plates 21 slide below the lower pressing plate 2. Extension seats 22 are fixedly connected to the top ends of the plurality of positioning plates 21. The plurality of extension seats 22 are all slidably connected to the inside of the lower pressing plate 2. An installation top plate 3 is provided above the lower pressing plate 2. An extension plate 31 is slidably connected to the inside of the installation top plate 3. A clamping seat 32 is fixedly connected to one side of the extension plate 31. The hydraulic pump 4 is installed on the top end of the installation top plate 3. The hydraulic cylinder 41 is installed at the bottom end of the hydraulic pump 4. The pressure sensor 42 is installed at the bottom end of the hydraulic cylinder 41. The hydraulic pump 4 and the hydraulic cylinder 41 are connected by the guide oil pipe 43. A pressure application plate 44 is fixedly connected to the bottom end of the pressure sensor 42.

[0018] In this implementation scheme: The transfer base plate 1 is used to support and connect each component, so as to complete the test work of car unloading protection through the cooperation of other components. The staff can assist the movement of each component through the transfer base plate 1, so as to facilitate the staff to move the device to a suitable position. The fixed seat 11 fixed to the top end of the transfer base plate 1 is used to position the lower pressing plate 2, so that during the movement, components such as the lower pressing plate 2 will not have unnecessary displacement. The positioning plates 21 that slide below the lower pressing plate 2 are used to apply pressure to the car. The extension seats 22 are fixed to the top ends of the positioning plates 21. The extension seats 22 are used to connect the positioning plates 21 with the lower pressing plate 2. During the test, the staff can move the components such as the lower pressing plate 2 from above the transfer base plate 1 and carry them to the top of the car. An installation top plate 3 is provided above the lower pressing plate 2, and an extension plate 31 slides inside the installation top plate 3. The staff can slide the extension plate 31, so that the extension plate 31 drives the clamping seat 32 to move to the position of the car guide rail. Then the staff can fix the clamping seat 32 to the outside of the guide rail through bolts, so that the clamping seat 32 supports and fixes the components such as the installation top plate 3 through the guide rail. Then the staff can slide a plurality of positioning plates 21 at the bottom of the lower pressing plate 2, so that the staff can move the positioning plates 21 to a suitable position according to the actual size of the car. When the positioning plates 21 move, they will drive the extension seats 22 to slide inside the lower pressing plate 2, so that the plurality of positioning plates 21 are evenly located on the top of the car. Then the staff can start the hydraulic pump 4. The hydraulic pump 4 will circulate hydraulic oil into the hydraulic cylinder 41 through the guide oil pipe 43. The hydraulic cylinder 41 will drive the pressure sensor 42 and the pressure application plate 44 to move towards the lower pressing plate 2. When the lower pressing plate 2 receives the acting force, it will drive the extension seats 22 and a plurality of positioning plates 21 to apply a downward acting force, so that the car receives the acting force. The staff can judge the value of the acting force through the pressure sensor 42 until the car receives a suitable acting force, so as to facilitate the staff to complete the test work of car overload protection.

[0019] A plurality of rotating wheels 12 are rotatably connected to the bottom end of the transfer base plate 1, and a push rod 13 is fixedly connected to one side of the transfer base plate 1; the rotating wheels 12 rotatably connected to the bottom end of the transfer base plate 1 are used to assist in the movement of the transfer base plate 1, so that the staff can move other components to a suitable position through the transfer base plate 1, and the push rod 13 fixedly connected to one side of the transfer base plate 1 is used to assist the staff in applying a force to the transfer base plate 1, so that the staff can push the transfer base plate 1 and other components to a suitable position, so as to facilitate the staff to complete the overload protection test work of the car.

[0020] An extension seat 23 is fixedly connected to the bottom end of the lower pressure plate 2, and the extension seat 23 slides inside the fixed seat 11; the extension seat 23 fixedly connected to the bottom end of the lower pressure plate 2 is used to fix the position of the lower pressure plate 2. When the staff moves components such as the lower pressure plate 2, the staff can slide the extension seat 23 into the inside of the fixed seat 11, so that the fixed seat 11 limits the extension seat 23, so that when the staff moves the lower pressure plate 2, the lower pressure plate 2 will not have unnecessary displacement relative to the transfer base plate 1.

[0021] A plurality of guiding grooves 24 are formed inside the lower pressure plate 2, and a plurality of extension seats 22 respectively slide inside the plurality of guiding grooves 24, and scales 25 are provided at the tops of the plurality of extension seats 22; the guiding grooves 24 formed inside the lower pressure plate 2 are used to guide and restrict the sliding of the extension seats 22, so that when the staff slides the positioning plate 21 and the extension seats 22, there will be no deviation or other situations. Furthermore, the staff can slide the positioning plate 21 to a suitable position according to the size of the car, so that when the positioning plate 21 applies a force to the car, the car will receive a uniform force to ensure the accuracy of the overload protection test result of the car. The scales 25 provided at the tops of the extension seats 22 are used to assist the staff in sliding the plurality of positioning plates 21 to a suitable position, so that the plurality of positioning plates 21 can apply forces to the car evenly.

[0022] A connecting rod 33 is fixedly connected to the top end of the lower pressure plate 2, an adjusting rod 34 is slidably connected inside the connecting rod 33, and the adjusting rod 34 is fixedly connected to the bottom end of the mounting top plate 3; the connecting rod 33 fixedly connected to the top end of the lower pressure plate 2 is used to connect the lower pressure plate 2 and the mounting top plate 3, so that when the mounting top plate 3 is fixed through the clamping seat 32, the hydraulic pumps 4 and the hydraulic cylinders 41 installed at both ends of the mounting top plate 3 can apply a force to the lower pressure plate 2 through the pressing plate 44. The adjusting rod 34 slidably connected inside the mounting top plate 3 is used to connect the mounting top plate 3 and the lower pressure plate 2, so that the staff can adjust the mounting top plate 3 to a suitable height, so that the hydraulic pumps 4 and the hydraulic cylinders 41 can press down the lower pressure plate 2 through the pressing plate 44 to complete the overload protection test work of the car.

[0023] A guiding groove 35 is formed inside the mounting top plate 3, and the extension plate 31 is slidably connected to the inside of the mounting top plate 3 through the guiding groove 35. The guiding groove 35 formed inside the mounting top plate 3 is used to guide the sliding of the extension plate 31, so that when the staff slides the clamping seat 32 until the clamping seat 32 reaches the position of the car guide rail, the extension plate 31 will not be offset or the like, ensuring that the clamping seat 32 fixed to the extension plate 31 can stably support components such as the mounting top plate 3 when fixed to the outside of the guide rail by bolts.

[0024] The working principle and usage process of the present utility model: When the staff needs to conduct an overload protection test on the car, the staff can place the lower pressing plate 2 on the top end of the transfer bottom plate 1, and slide the extension seat 23 into the fixed seat 11. Then, the staff can move each component to a suitable position through the transfer bottom plate 1. Then, the staff can move the lower pressing plate 2 away from above the transfer bottom plate 1 and carry it to the top of the car. Then, the staff can slide the extension plate 31 to drive the clamping seat 32 to move to the position of the car guide rail. Then, the staff can fix the clamping seat 32 to the outside of the guide rail by bolts. Then, the staff can slide several positioning plates 21 at the bottom of the lower pressing plate 2 so that the staff can move the positioning plates 21 to suitable positions according to the actual size of the car. Then, the staff can start the hydraulic pump 4, and the hydraulic pump 4 will circulate and introduce hydraulic oil into the hydraulic cylinder 41 through the oil guide pipe 43. The hydraulic cylinder 41 will drive the pressure sensor 42 and the pressing plate 44 to move towards the lower pressing plate 2. When the lower pressing plate 2 is subjected to a force, it will drive the extension seat 22 and several positioning plates 21 to apply a downward force, so that several positioning plates 21 apply a suitable force to the car to complete the overload protection test operation of the car.

Claims

1. A car overload protection test device, comprising a transfer bottom plate (1), a hydraulic pump (4), a hydraulic cylinder (41), a pressure sensor (42), and an oil guide pipe (43), characterized in that: A fixed seat (11) is fixedly connected to the top end of the transfer bottom plate (1). A lower pressing plate (2) is arranged above the transfer bottom plate (1). A plurality of positioning plates (21) slide below the lower pressing plate (2). The top ends of the plurality of positioning plates (21) are fixedly connected with extension seats (22). The plurality of extension seats (22) are all slidably connected inside the lower pressing plate (2). An installation top plate (3) is arranged above the lower pressing plate (2). An extension plate (31) is slidably connected inside the installation top plate (3). A clamping seat (32) is fixedly connected to one side of the extension plate (31). The hydraulic pump (4) is installed at the top end of the installation top plate (3). The hydraulic cylinder (41) is installed at the bottom end of the hydraulic pump (4). The pressure sensor (42) is installed at the bottom end of the hydraulic cylinder (41). The hydraulic pump (4) and the hydraulic cylinder (41) are connected through the oil guide pipe (43). The bottom end of the pressure sensor (42) is fixedly connected with a pressing plate (44).

2. The car overload protection test device according to claim 1, characterized in that: A plurality of rotating wheels (12) are rotatably connected to the bottom end of the transfer bottom plate (1). A push rod (13) is fixedly connected to one side of the transfer bottom plate (1).

3. The car overload protection test device according to claim 1, characterized in that: An extension seat (23) is fixedly connected to the bottom end of the lower pressing plate (2). The extension seat (23) slides inside the fixed seat (11).

4. A car overload protection test device according to claim 1, characterized in that: A plurality of guiding grooves (24) are formed inside the lower pressing plate (2). The plurality of extension seats (22) respectively slide inside the plurality of guiding grooves (24). Scales (25) are arranged at the top ends of the plurality of extension seats (22).

5. The car overload protection test device according to claim 1, characterized in that: A connecting rod (33) is fixedly connected to the top end of the lower pressing plate (2). An adjusting rod (34) slides inside the connecting rod (33). The adjusting rod (34) is fixedly connected to the bottom end of the installation top plate (3).

6. The car overload protection test device according to claim 1, characterized in that: A guiding groove (35) is formed inside the installation top plate (3). The extension plate (31) is slidably connected inside the installation top plate (3) through the guiding groove (35).

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