Fully automatic fire extinguisher operating mechanism impact test device

Abstract

The invention relates to an impact test device for a fully automatic fire extinguisher operating mechanism, comprising a base frame and a bracket lifting mechanism; the base frame is arranged horizontally, and the bracket lifting mechanism is arranged upright; X and Y are mutually perpendicular directions in a horizontal plane, and the Z direction is vertically upward; a heavy hammer automatic picking and releasing device capable of being raised and lowered in the Z direction is arranged on the bracket lifting mechanism; a guide rail for an X-direction traveling mechanism to move is arranged on the base frame, and a self-centering clamp mechanism for clamping a fire extinguisher bottle is fixedly arranged on the X-direction traveling mechanism; a weighing and lifting mechanism is arranged inside the base frame just below the heavy hammer automatic picking and releasing device; a clamp flipping mechanism is fixedly arranged on the X-direction traveling mechanism, and the clamp flipping mechanism flips with a rotating shaft in the Y direction; the heavy hammer automatic picking and releasing device comprises a sleeve, and a heavy hammer pulled by a hanging rope is arranged in the sleeve, and the hanging rope is locked or released by a release motor.

Description

Technical Field

[0001] The invention relates to an impact test device for a full-automatic fire extinguisher operating mechanism, belonging to the technical field of fire extinguisher impact tests. Background Art

[0002] Clause 7.6 of GB4351.1 "Portable Fire Extinguishers Part 1: Performance and Structural Requirements" stipulates that the fire extinguisher operating mechanism must be subjected to an impact test. The impact test requires that the minimum operating temperature (deviation is 5) be maintained for more than 24 hours. The experiment should be carried out in the lowest operating environment. After the fire extinguisher's lifting and pressure handle and safety pin are impact tested separately, visual inspection is carried out to check whether there are cracks, and in subsequent tests, water injection is used to check whether there is leakage, so as to determine the strength of the fire extinguisher operating mechanism.

[0003] At present, fire extinguisher manufacturers and testing agencies mainly use manual measurement to test the impact strength of fire extinguishers, that is, a cylindrical flat-bottomed steel hammer with a diameter of 75mm and a weight of 4kg is manually hung above the fire extinguisher, and the impact height from the fire extinguisher is H=M / 20, and the free fall method is used to impact the operating mechanism of the fire extinguisher to achieve the impact test. The main problems are:

[0004] 1. During the manual test, the height of the heavy hammer and the impact position rely on visual inspection, and there is a great deal of uncertainty in the operation method of each person.

[0005] 2. The national standard GB4351.1-2005 requires that the weight release height be calculated based on the specific weight of each fire extinguisher. Currently, the weight release height in manual inspection is based on the same specification of fire extinguishers and the same release height, which has poor accuracy.

[0006] 3. There are great safety hazards in the test process. When the heavy hammer falls freely, the lack of appropriate protective components may injure the operator.

[0007] Therefore, it is necessary to design and manufacture a fire extinguisher impact test device. Summary of the invention

[0008] The purpose of the present invention is to provide a fully automatic fire extinguisher operating mechanism impact test device, which achieves the functions and effects of safety design, automatic impact function design, and mechatronics integrated design.

[0009] The present invention adopts the following technical solutions:

[0010] A fully automatic fire extinguisher operating mechanism impact test device, including a base frame, a bracket lifting mechanism 4; the base frame is horizontally arranged, and the bracket lifting mechanism 4 is upright; X and Y are directions perpendicular to each other in the horizontal plane, and the Z direction is vertically upward; the bracket lifting mechanism 4 is provided with a heavy hammer automatic picking and releasing device 3 that can be raised and lowered along its Z direction; the base frame is provided with a guide rail for the X-direction walking mechanism 1 to move, and a self-centering clamp mechanism 5 for clamping a fire extinguisher bottle is fixedly arranged on the X-direction walking mechanism 1; a weighing lifting mechanism 2 is arranged inside the base frame just below the heavy hammer automatic picking and releasing device 3; the X-direction walking mechanism 1 is fixedly provided with a clamp flipping mechanism 7, and the clamp flipping mechanism 7 flips with a rotating axis in the Y direction; the heavy hammer automatic picking and releasing device 3 includes a sleeve, and a heavy hammer pulled by a hanging rope is arranged in the sleeve, and the hanging rope is controlled by a release motor 8 to lock or release.

[0011] Preferably, it also includes a PLC control component 6, which is electrically connected to the release motor 8, the bracket lifting motor 9, the clamp flipping mechanism 7, the weighing and lifting mechanism 2, and the X-axis walking mechanism 1.

[0012] Preferably, the self-centering clamp mechanism 5 is a three-jaw self-centering clamp mechanism.

[0013] Preferably, a gravity sensor is provided at the bottom of the weighing and lifting mechanism 2 to measure the weight of the fire extinguisher and automatically upload the weight to the PLC.

[0014] Preferably, the weight automatic picking up and releasing device 3 is provided with a height sensor. After the fire extinguisher is placed, the weight automatic picking up and releasing device 3 will automatically descend to measure the height of the fire extinguisher through the height sensor.

[0015] Preferably, the clamp flipping mechanism 7 is provided with an angle sensor to measure the flipping angle to ensure that the fire extinguisher is in a horizontal state.

[0016] Preferably, it also includes an automatic cushioning mechanism for the pad. After the center of the fire extinguisher head moves to the center position below the heavy hammer, the electric slide rail of the X-axis walking mechanism drives the steel block to automatically move to the pressure gauge at the bottom of the fire extinguisher, so that the heavy hammer is automatically released to complete the safety pin impact test of the fire extinguisher in the horizontal state.

[0017] An impact test device for a fully automatic fire extinguisher operating mechanism as described in any one of the above, comprising the following steps:

[0018] S1. Automatic measurement of the weight and height of the fire extinguisher: A gravity sensor is provided at the bottom of the weighing and lifting mechanism 2 to measure the weight of the fire extinguisher, and the weight information is automatically uploaded to the PLC; after the fire extinguisher is placed, the weight release mechanism will automatically drop to measure the height of the fire extinguisher through the height sensor;

[0019] S2. Automatic lifting of the weight release height: After the fire extinguisher is weighed, the weight information is automatically uploaded to the PLC, and the weight release mechanism rises to H=M / 20 according to the weight, where M is the weight of the fire extinguisher, and then releases the weight, or the weight release height is manually adjusted through the touch screen;

[0020] S3, automatic lifting of weighing platform: according to the measured height of the fire extinguisher, the weighing platform automatically rises or falls a set distance to ensure that the clamp is clamped in the middle of the fire extinguisher;

[0021] S4. Automatic clamping and flipping of the fixture flipping mechanism: A force sensor is installed on one of the clamping heads of the three-jaw self-centering fixture. The sensor sets a force value and is tested to effectively clamp portable fire extinguishers of various sizes.

[0022] S5, automatic movement in X direction: the gripping and flipping mechanism 7 moves automatically on the base frame, and the walking distance is measured by the distance sensor on the base; according to the length of the fire extinguisher and the measured height data of the fire extinguisher, when the fixture moves to the corresponding distance, the fixture flipping mechanism 7 performs a 90-degree flip, and the flipping angle control is measured by the angle sensor on the fixture to ensure that the fire extinguisher is in a horizontal state;

[0023] S6. Automatic tightening of the pad: After the center of the fire extinguisher head moves to the center position below the heavy hammer, the electric slide rail of the X-axis walking mechanism drives the steel block to automatically move to the pressure gauge at the bottom of the fire extinguisher, and then releases the motor 8 to control the heavy hammer to automatically release to complete the safety pin impact test of the fire extinguisher in the horizontal state. The upper end of the heavy hammer is pulled by a traction rope to prevent it from catapulting to the surrounding after falling.

[0024] The beneficial effects of the present invention are:

[0025] 1) Safety design: In order to prevent personal injury when the heavy hammer falls, an anti-collision mechanism is designed. The heavy hammer is set inside the casing, and its upper part is pulled by a hanging rope. When the motor releases it, the heavy hammer falls freely, but the traction rope will have a pulling effect on the heavy hammer to prevent it from catapulting to the surroundings after falling and injuring the tester;

[0026] 2) Through the design of the X-axis walking mechanism and the fixture flipping mechanism, the fire extinguisher bottle can be flipped horizontally, and the impact test in both upright and horizontal states can be realized. The design is ingenious and thoughtful;

[0027] 3) Automatic impact mechanism design: a fire extinguisher load-bearing measurement component is designed at the bottom of the device. The weight information is automatically uploaded to the processor to realize automatic setting of the weight height, and can be electrically adjusted from the operation interface.

[0028] 4) Mechatronics integrated design, through the combination of load calculation and selection of power components, design and selection of weight sensors, design and selection of display components, and stability and reliability design of mechanical components, an integrated device is formed to achieve lightweight and commercialization of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a stereoscopic diagram of the impact test device for the operating mechanism of a fully automatic fire extinguisher.

[0030] Figure 2 yes Figure 1 A partial enlarged view of .

[0031] Figure 3 yes Figure 1 Another enlarged view of the part.

[0032] Figure 4 It is the front view of the impact test device for the operating mechanism of a fully automatic fire extinguisher.

[0033] Figure 5 yes Figure 4 Right view of .

[0034] Figure 6 yes Figure 5 Top view of the .

[0035] In the figure, 1. X-axis walking mechanism, 2. weighing and lifting mechanism, 3. automatic picking and releasing device of heavy hammer, 4. bracket lifting mechanism, 5. three-claw self-centering clamp mechanism, 6. PLC control component, 7. clamp flipping mechanism, 8. release motor, 9. lifting motor. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] See also Figure 1-Figure 6 , a fully automatic fire extinguisher operating mechanism impact test device, including a base frame, a bracket lifting mechanism 4; the base frame is horizontally arranged, and the bracket lifting mechanism 4 is upright; X and Y are directions perpendicular to each other in the horizontal plane, and the Z direction is vertically upward; the bracket lifting mechanism 4 is provided with a heavy hammer automatic picking and releasing device 3 that can be raised and lowered along its Z direction; the base frame is provided with a guide rail for the X-direction walking mechanism 1 to move, and a self-centering clamp mechanism 5 for clamping a fire extinguisher bottle is fixedly arranged on the X-direction walking mechanism 1; a weighing lifting mechanism 2 is arranged inside the base frame just below the heavy hammer automatic picking and releasing device 3; the X-direction walking mechanism 1 is fixedly provided with a clamp flipping mechanism 7, and the clamp flipping mechanism 7 flips with a rotating axis in the Y direction; the heavy hammer automatic picking and releasing device 3 includes a sleeve, and a heavy hammer pulled by a hanging rope is arranged in the sleeve, and the hanging rope is controlled by a release motor 8 to lock or release.

[0038] It should be noted that a limit mechanism can be set inside the sleeve of the automatic picking-up and releasing device 3 of the heavy hammer. A component, such as a small ball, is set inside the sleeve. The small ball is fixed to the rope and falls with the heavy hammer, but the small ball stops falling when it falls to the limit mechanism, that is, the small ball cannot escape from the sleeve. In this way, the falling distance of the heavy hammer can be set to ensure that the heavy hammer will not fall to the ground and eject after hitting the fire extinguisher operating mechanism.

[0039] In this embodiment, see Figure 1 , and also includes a PLC control component 6, which is electrically connected to a release motor 8, a bracket lifting motor 9, a fixture flipping mechanism 7, a weighing and lifting mechanism 2, and an X-axis walking mechanism 1.

[0040] In this embodiment, see Figure 1 The self-centering clamp mechanism 5 is a three-jaw self-centering clamp mechanism.

[0041] In this embodiment, a gravity sensor is provided at the bottom of the weighing and lifting mechanism 2 to measure the weight of the fire extinguisher and automatically upload the weight to the PLC.

[0042] In this embodiment, the weight automatic picking up and releasing device 3 is provided with a height sensor. After the fire extinguisher is placed, the weight automatic picking up and releasing device 3 will automatically descend to measure the height of the fire extinguisher through the height sensor.

[0043] In this embodiment, the clamp flipping mechanism 7 is provided with an angle sensor to measure the flipping angle to ensure that the fire extinguisher is in a horizontal state.

[0044] In this embodiment, there is also an automatic pad tightening mechanism, and after the center of the fire extinguisher head moves to the center position below the heavy hammer, the electric slide rail of the X-axis walking mechanism drives the steel block to automatically move to the pressure gauge at the bottom of the fire extinguisher, so that the heavy hammer is automatically released to complete the safety pin impact test of the fire extinguisher in the horizontal state. This is not shown in the attached drawings.

[0045] The specific experiment includes the following steps:

[0046] Automatic measurement of fire extinguisher weight and height: A gravity sensor is designed at the bottom of the weighing platform to measure the weight of the fire extinguisher, and the weight information is automatically uploaded to the PLC. After placing the fire extinguisher, the weight release mechanism will automatically drop to measure the height of the fire extinguisher through the height sensor.

[0047] The weight release height automatically rises and falls: after the fire extinguisher is weighed, the weight information is automatically uploaded to the PLC, and the weight release mechanism rises to H=M / 20 according to the weight, where M is the position of the fire extinguisher weight, and the weight is released. The weight release height can also be manually adjusted through the touch screen.

[0048] Automatic lifting mechanism of weighing platform: To ensure that the clamp is clamped in the middle of the fire extinguisher, it is more secure and can be turned over later. According to the previously measured height of the fire extinguisher, the weighing platform can automatically rise or fall a certain distance to ensure that the clamp is clamped in the middle of the fire extinguisher.

[0049] The fixture flipping mechanism automatically clamps and flips: The three-jaw self-centering fixture is used to clamp the oval fire extinguisher cylinder. A force sensor is installed on one of the clamps of the three-jaw self-centering fixture. The sensor is set to a force value of 11N. In actual tests, it is determined that it can effectively clamp portable fire extinguishers of various sizes.

[0050] Automatic left and right movement: The gripping and flipping mechanism can automatically move on the base, and the walking distance is measured by the distance sensor on the base. According to the length of the fire extinguisher and the measured height data of the fire extinguisher, when the fixture moves to the corresponding distance, the fixture flips 90 degrees, and the flip angle is measured by the angle sensor on the fixture to ensure that the fire extinguisher is in a horizontal state.

[0051] Automatic tightening of pads: Due to the requirements of standard GB4351.1-2005, when conducting the impact test of the safety pin of the fire extinguisher in the horizontal state, the fire extinguisher head should be placed on the steel block after the fire extinguisher is placed horizontally. The device uses an electric slide rail. After the center of the fire extinguisher head moves to the center position of the steel hammer, the electric slide rail drives the steel block to automatically move to the pressure gauge at the bottom of the fire extinguisher, and then the heavy hammer is automatically released to complete the impact test of the safety pin of the fire extinguisher in the horizontal state.

[0052] The device has a very broad prospect for promotion and application. At present, domestic fire extinguisher manufacturers and testing institutions do not have automatic monitoring devices. Therefore, there are 200 fire extinguisher manufacturers in the country. According to the demand of each manufacturer for one set, 50% of the fire extinguisher manufacturers are equipped with one set. Each set of equipment costs 150,000 yuan, and the output value is about 200*50%*15=15 million.

[0053] The specific technical indicators of accuracy in this embodiment include: X-axis travel of the walking mechanism 0-1400mm; weighing sensor range 0-50kg; selected weight accuracy of 4kg±0.1kg. It has the function of being applicable to the impact test of the fire extinguisher operating mechanism at low temperature (minimum -20℃), the accuracy of the weighing component of the device is within ±0.5%, and the accuracy of the height measurement component is within ±0.5%.

[0054] The actual components used are: 1 stepper motor, 5 intermediate relays, 2 frequency converters, 3 speed regulators, 1 touch screen, 10 sensors, PLC, ball screw (for bracket lifting structure), 380V power supply, frame length-width-height 1500mm-790mm-2200mm, weighing range 0-100kg, X-axis walking mechanism stroke 0-1400mm, fixture inner hole 250mm, three-jaw fixture.

[0055] The design and use of this test device can completely fundamentally solve the current situation of inaccurate manual detection data, non-repeatable measurement process and unsafe operation in the impact test of the fire extinguisher operating mechanism. It fills the gap in the existing technology in the impact test device of the fire extinguisher operating mechanism, provides manufacturers and testing institutions with standard and reliable test devices, and further improves the detection level and efficiency.

Claims

1. A fully automatic fire extinguisher operating mechanism impact test device, characterized in that: It comprises a base frame and a support lifting mechanism (4); the base frame is arranged horizontally, and the support lifting mechanism (4) is arranged upright; X and Y are mutually perpendicular directions in the horizontal plane, and Z is vertically upward; The support lifting mechanism (4) is provided with a heavy hammer automatic picking and releasing device (3) which can be raised and lowered along the Z direction; A guide rail for the X-axis travel mechanism (1) to move is provided on the base frame, and a self-centering clamp mechanism (5) for clamping a fire extinguisher bottle is fixedly provided on the X-axis travel mechanism (1); a weighing and lifting mechanism (2) is provided inside the base frame directly below the automatic pick-up and release device (3) of the heavy hammer; The X-direction walking mechanism (1) is fixedly provided with a fixture flipping mechanism (7), and the fixture flipping mechanism (7) flips along a rotation axis in the Y direction; The automatic pick-up and release device (3) of the weight includes a sleeve, in which a weight pulled by a hanging rope is arranged, and the hanging rope is controlled by a release motor (8) to lock or release; It also includes a PLC control component (6), wherein the PLC control component (6) is electrically connected to a release motor (8), a bracket lifting motor (9), a fixture flipping mechanism (7), a weighing lifting mechanism (2), and an X-axis walking mechanism (1); The bottom of the weighing and lifting mechanism (2) is provided with a gravity sensor to measure the weight of the fire extinguisher and automatically upload the weight to the PLC; The weight hammer automatic picking up and releasing device (3) is provided with a height sensor. After the fire extinguisher is placed, the weight hammer automatic picking up and releasing device (3) will automatically descend to measure the height of the fire extinguisher through the height sensor. The fixture flipping mechanism (7) is provided with an angle sensor to measure the flipping angle to ensure that the fire extinguisher is in a horizontal state; It also includes an automatic tightening mechanism for the pad. After the center of the fire extinguisher head moves to the center position under the heavy hammer, the electric slide rail of the X-axis walking mechanism drives the steel block to automatically move to the pressure gauge at the bottom of the fire extinguisher, so that the heavy hammer is automatically released to complete the safety pin impact test of the fire extinguisher in the horizontal state.

2. The impact test device for the fully automatic fire extinguisher operating mechanism according to claim 1, characterized in that: The self-centering clamp mechanism (5) is a three-jaw self-centering clamp mechanism.

3. An impact test device for a fully automatic fire extinguisher operating mechanism according to any one of claims 1 to 2, characterized in that: The following steps are involved: S1. Automatic measurement of the weight and height of the fire extinguisher: A gravity sensor is provided at the bottom of the weighing and lifting mechanism (2) to measure the weight of the fire extinguisher, and the weight information is automatically uploaded to the PLC; after the fire extinguisher is placed, the weight release mechanism automatically descends through the height sensor to measure the height of the fire extinguisher; S2. Automatic lifting of the weight release height: After the fire extinguisher is weighed, the weight information is automatically uploaded to the PLC, and the weight release mechanism rises to H=M / 20 according to the weight, where M is the weight of the fire extinguisher, and then releases the weight, or the weight release height is manually adjusted through the touch screen; S3, automatic lifting of weighing platform: according to the measured height of the fire extinguisher, the weighing platform automatically rises or falls a set distance to ensure that the clamp is clamped in the middle of the fire extinguisher; S4. Automatic clamping and flipping of the fixture flipping mechanism: A force sensor is installed on one of the clamping heads of the three-jaw self-centering fixture. The sensor sets a force value and is tested to effectively clamp portable fire extinguishers of various sizes. S5, automatic movement in X direction: the gripping and flipping mechanism (7) automatically moves on the base frame, and the walking distance is measured by the distance sensor on the base; according to the length of the fire extinguisher and the measured height data of the fire extinguisher, when the fixture moves to the corresponding distance, the fixture flipping mechanism (7) performs a 90-degree flip, and the flipping angle control is measured by the angle sensor on the fixture to ensure that the fire extinguisher is in a horizontal state; S6. Automatic tightening of the pad: After the center of the fire extinguisher head moves to the center position below the heavy hammer, the electric slide rail of the X-axis walking mechanism drives the steel block to automatically move to the pressure gauge at the bottom of the fire extinguisher, and then the release motor (8) controls the heavy hammer to automatically release to complete the safety pin impact test of the fire extinguisher in the horizontal state. The upper end of the heavy hammer is pulled by a traction rope to prevent it from being ejected to the surrounding after falling.

Images