Device for testing high-temperature resistance of door closer

Abstract

The invention discloses a door closer high temperature resistance test device which comprises a box body, a displacement sensor and an angle sensor, a simulation door frame and a simulation door are installed in the box body, a door closer sample is installed at the top end of the simulation door frame and the top end of the simulation door, and a flow guide plate is further installed in the box body. An air heating space is formed between the guide plate and part of the inner wall of the box body, an air inlet and an air outlet are formed in the guide plate, an electric heater is installed on the side, located in the air heating space, of the guide plate, an impeller of the centrifugal fan is close to the air inlet, and hot air enters from the air inlet, passes through the space where the simulation door is located and then enters the air heating space from the air outlet to be heated again; the angle sensor is connected with a rotating shaft of the simulation door and installed outside the box body, the displacement sensor is installed outside the box body through a connecting rod, and a probe at the end of the connecting rod abuts against the simulation door during testing. According to the invention, accurate temperature control can be realized, the energy consumption is low, and the test data is reliable.

Description

Technical Field

[0001] The invention relates to the technical field of testing and detecting fire door closers, and in particular to a high temperature resistance performance testing device for door closers. Background Art

[0002] In the production of door closers, high temperature testing is a crucial link to ensure the reliability and stability of door closers under high temperature conditions. During the test, the door closer needs to be placed in a test box. The temperature controller controls the heater to raise the temperature in the test box to 150°C at a rate of 10°C / minute, and then keep the temperature constant for 5 minutes. At this temperature, the opening torque, maximum closing time, minimum closing time, closing torque, and closing reset deviation tests are carried out in turn.

[0003] Traditional high temperature test devices usually use fuel nozzles to increase the temperature. During the test, there are problems such as poor temperature uniformity, low control accuracy, high energy consumption, and environmental pollution. In addition, during the test, the sample needs to be rotated in the box, and the angle of the sample rotation and the displacement of the sample when it is closed are tested. Traditional angle sensors and displacement sensors do not have high temperature resistance. Therefore, it is necessary to provide a high temperature resistance test device for door closers to solve the problems in the prior art. Summary of the invention

[0004] The purpose of the present invention is to provide a high temperature performance test device for door closers with high temperature stability, low energy consumption, convenient testing and reliability in view of the deficiencies in the prior art.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A high temperature resistance performance test device for a door closer comprises a box body, a displacement sensor and an angle sensor, one side of the box body is a box door, a simulated door frame and a simulated door are installed in the box body, the simulated door is rotatably connected to the simulated door frame through a rotating shaft, and a door closer sample is installed on the top of the simulated door frame and the simulated door, a guide plate is also installed in the box body, an air heating space is formed between the guide plate and a part of the inner wall of the box body, an air inlet and an air outlet are arranged on the guide plate, an electric heater is installed on one side of the air heating space, the impeller of the centrifugal fan is close to the air inlet, hot air enters from the air inlet, passes through the space where the simulated door is located, and enters the air heating space from the air outlet to be heated again; the angle sensor is connected to the rotating shaft of the simulated door and is installed outside the box body, the displacement sensor is installed outside the box body through a connecting rod, and the probe at the end of the connecting rod is against the simulated door during the test.

[0007] Furthermore, the angle sensor is a rotary encoder, which is connected to the rotating shaft of the simulated door through a connecting shaft, a coupling and a rotating wheel. The rotating wheel is fixedly mounted on the connecting shaft, and the connecting shaft is connected to the rotating shaft of the simulated door through a coupling. The rotating wheel rotates synchronously with the synchronous wheel of the rotary encoder.

[0008] Furthermore, a support seat for supporting the connecting rod is fixed on the outer wall of the box body.

[0009] Furthermore, the guide plate is composed of a plurality of plates spliced ​​together.

[0010] Furthermore, a transverse slit is provided on the box door. During the test, the simulated door is opened by a pull rope, one end of the pull rope is connected to the simulated door, and the other end passes through the transverse slit and is located outside the box.

[0011] Furthermore, one end of the pull rope outside the box is connected to a force measuring device.

[0012] Compared with the prior art, the present invention has the following effects:

[0013] (1) The present invention uses an electric heater to heat the air, which can achieve more precise temperature control and ensure that the temperature stability during the test reaches a better level.

[0014] (2) The present invention provides a guide plate and a centrifugal fan in the box to circulate the air in the box, which not only reduces energy consumption but also minimizes additional heat loss while the air circulates, thereby ensuring optimal energy utilization.

[0015] (3) The present invention installs the angle sensor and the displacement sensor outside the box, which ensures that the angle sensor and the displacement sensor are tested accurately and the data is reliable.

[0016] (4) The present invention has a compact structure, high integration, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of another angle of the present invention;

[0019] Figure 3 The schematic diagram of the three-dimensional structure of the present invention when the top plate of the box body is removed is shown;

[0020] Figure 4 It is a structural schematic diagram of the guide plate and the heater part;

[0021] Figure 5 It is a schematic diagram of the structure of the guide plate and the heater part from another angle;

[0022] Markings in the figure: 1. Box body; 101. Box door; 102. Horizontal seam; 2. Centrifugal fan; 3. Displacement sensor; 4. Support seat; 5. Angle sensor; 6. Rotor; 7. Connecting shaft; 8. Coupling; 9. Simulated door; 10. Simulated door frame; 11. Guide plate; 1101. Air inlet; 1102. Air outlet; 12. Electric heater; 13. Connecting rod. DETAILED DESCRIPTION

[0023] like Figure 1-Figure 5 As shown, a high temperature resistance performance test device for a door closer provided in this embodiment includes a box body 1, a centrifugal fan 2, a displacement sensor 3, a support seat 4, an angle sensor 5, a wheel 6, a connecting shaft 7, a coupling 8, a simulated door 9, a simulated door frame 10, a guide plate 11, an electric heater 12, a connecting rod 13 and a probe, one side of the box body 1 is a box door 101, and a transverse slit 102 is provided on the box door 101; a simulated door frame 10 and a simulated door 9 are installed in the box body 1, and the simulated door 9 is rotatably connected to the simulated door frame 10 through a rotating shaft, and a door closer sample is installed at the top of the simulated door frame 10 and the simulated door 9. During the test, the simulated door 9 is pulled open by a pull rope, one end of the pull rope is connected to the simulated door 9, and the other end passes through the transverse slit and is located outside the box body 1, and the end of the pull rope located outside the box body 1 is connected to a force gauge.

[0024] The box 1 is provided with a guide plate 11, and an air heating space is formed between the guide plate 11 and part of the inner wall of the box 1. The guide plate 11 is composed of a plurality of plates, one of which is provided with an air inlet 1101, and the other two guide plates 11 are provided with air outlets 1102. The impeller of the centrifugal fan 2 is located behind and close to the air inlet 1101. The electric heater 12 is installed on the guide plate 11 at one side of the air heating space. When working, hot air enters from the air inlet 1101, passes through the space where the simulated door 9 is located, enters the air heating space from the air outlet 1101 for reheating, and then enters the door closer test space from the air inlet 1101. Such a cycle can ensure the uniformity and stability of temperature during the test, and can minimize additional heat loss.

[0025] The angle sensor 5 is installed on the top surface of the box 1 and is located outside the box 1. The angle sensor 5 adopts a rotary encoder. The rotary encoder is connected to the rotating shaft of the simulated door 9 through a connecting shaft 7, a coupling 8 and a rotating wheel 6. The rotating wheel 6 is fixedly installed on the connecting shaft 7. The connecting shaft 7 is connected to the rotating shaft of the simulated door 9 through a coupling. The rotating wheel 6 and the synchronous wheel of the rotary encoder rotate synchronously through friction transmission. The other end of the rotary encoder is fixed on the top surface of the box 1. The angle sensor 5 is used to test the rotation angle of the door closer sample. The displacement sensor 3 is installed outside the box 1 through a connecting rod 13. One end of the connecting rod 13 is connected to the displacement sensor 3, and the other end is connected to a probe. The connecting rod 13 is supported by a support seat 4. During the test, the probe is against the simulated door 9. The displacement sensor 3 is used to test the displacement of the door closer sample when it is closed. Since the displacement sensor 3 and the angle sensor 5 are both installed outside the box 1, the present invention can ensure that the test data is accurate and reliable.

[0026] When the present invention is working, the door closer sample is first installed on the top of the simulated door frame 10 and the simulated door 9 as required, then the box door 101 is closed, the electric heater 12 and the centrifugal fan 2 are started, and after the temperature reaches the requirement, the simulated door 9 is pulled open by the pull rope, and then let go. The simulated door 9 is automatically closed under the action of the door closer sample. During the closing process, the displacement sensor 3 and the angle sensor 5 respectively test the displacement of the door closer sample when it is closed and the rotation angle of the door closer sample, and transmit the data to the data receiving device.

[0027] The above description is only a preferred implementation manner of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature resistance performance test device for a door closer, comprising a box (1), a displacement sensor (3) and an angle sensor (5), wherein one side of the box (1) is a box door (101), a simulated door frame (10) and a simulated door (9) are installed in the box (1), the simulated door (9) is rotatably connected to the simulated door frame (10) via a rotating shaft, and a door closer sample is installed at the top of the simulated door frame (10) and the simulated door (9), characterized in that: A guide plate (11) is also installed in the box (1), and an air heating space is formed between the guide plate (11) and a part of the inner wall of the box (1). The guide plate (11) is provided with an air inlet (1101) and an air outlet (1102). An electric heater (12) is installed on the guide plate (11) located on one side of the air heating space. The impeller of the centrifugal fan (2) is close to the air inlet (1101). Hot air enters from the air inlet (1101), passes through the space where the simulated door (9) is located, and enters the air heating space from the air outlet (1102) to be heated again. The angle sensor (5) is connected to the rotating shaft of the simulated door (9) and is installed outside the box (1). The displacement sensor (3) is installed outside the box (1) through a connecting rod (13). During the test, the probe at the end of the connecting rod (13) is against the simulated door (9).

2. The high temperature resistance performance test device for door closers according to claim 1, characterized in that: The angle sensor (5) is a rotary encoder, which is connected to the rotating shaft of the simulation door (9) through a connecting shaft (7), a coupling (8) and a rotating wheel (6), the rotating wheel (6) is fixedly mounted on the connecting shaft (7), the connecting shaft (7) is connected to the rotating shaft of the simulation door (9) through the coupling (8), and the rotating wheel (6) rotates synchronously with the synchronous wheel of the rotary encoder.

3. The high temperature resistance performance test device for door closers according to claim 1, characterized in that: A support seat (4) supporting a connecting rod (13) is fixed on the outer wall of the box body (1).

4. The high temperature resistance performance test device for door closers according to claim 1, characterized in that: The guide plate (11) is composed of a plurality of plates spliced ​​together.

5. The high temperature resistance performance testing device for door closers according to claim 1, characterized in that: The box door (101) is provided with a transverse slit (102). During a test, the simulated door (9) is opened by a pull rope, one end of which is connected to the simulated door (9) and the other end of which passes through the transverse slit (102) and is located outside the box body (1).

6. The high temperature resistance performance test device for door closers according to claim 4, characterized in that: One end of the pull rope located outside the box (1) is connected to a force measuring device.

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