A star-delta emergency starting device for fire fighting machinery

Abstract

The invention discloses a star-delta emergency starting device for fire-fighting machinery, comprising a device component and a transmission mechanism, wherein a main rotating shaft is arranged inside the device component, a rotating handle is arranged at the top of the main rotating shaft, a transmission arm is arranged on the main rotating shaft, the transmission arm is connected with a corresponding connecting rod, a spring and a driving rod are arranged below one end of the connecting rod, the connecting rod, the spring and the driving rod form a spring driving mechanism, corresponding sliders are arranged below the spring driving mechanism, clamping parts are arranged on the left and right sides of the slider, and contact terminals are arranged on the outside of the transmission mechanism; the invention has a simple and reasonable structure, adopts a three-layer full mechanical structure design, has a more stable structure, realizes complete star-delta starting, combines reduced pressure and full pressure, has high product safety performance, and truly realizes mechanical emergency starting required by fire protection.

Description

Technical Field

[0001] The invention relates to a star-delta emergency starting device for a fire-fighting machine, belonging to the technical field of emergency devices for fire-fighting cabinets. Background Art

[0002] Traditional star-delta emergency starting devices usually adopt a two-layer design. To achieve delta starting alone is equivalent to full-voltage starting. The current is too large, and the device is prone to ignition and tripping. Alternatively, to achieve star starting alone, although it is a reduced-voltage start, it is not suitable for long-term operation and the water pump head cannot be reached, and it cannot truly meet the requirements of star-delta starting. In addition, traditional star-delta emergency starting devices usually use contactors to cooperate to achieve the closing and opening functions. When the electrical components involved fail, it is easy to cause the entire equipment to fail. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In order to solve the above problems, the present invention proposes a fire-fighting mechanical star-delta emergency starting device with a simple and reasonable structure, a three-layer full mechanical structure design, a more stable structure, and realization of complete star-delta starting, combining reduced pressure and full pressure, high product safety performance, and truly realizing the mechanical emergency starting required by fire protection.

[0005] (II) Technical solution

[0006] A star-delta emergency starting device for fire-fighting machinery of the present invention comprises a device component and a transmission mechanism, wherein a main rotating shaft is arranged inside the device component, a rotating handle is arranged at the top of the main rotating shaft, a first-layer transmission arm, a second-layer transmission arm and a third-layer transmission arm are arranged on the main rotating shaft respectively, and the transmission arms are respectively connected with corresponding first-layer connecting rods, second-layer connecting rods and third-layer connecting rods, a spring and a driving rod are arranged below one end of the connecting rod, and the connecting rod, spring and driving rod respectively form a first-layer spring driving mechanism, a second-layer spring driving mechanism and a third-layer spring driving mechanism, corresponding sliders are arranged below the spring driving mechanism, clamping parts are arranged on both sides of the slider, and the slider is arranged in the spring driving mechanism. When the main shaft is at 0° and not working, the first layer of transmission arm and the first layer of spring driving mechanism are respectively at 95° and 0°, the second layer of transmission arm and the second layer of spring driving mechanism are respectively at 5° and 0°, and the third layer of transmission arm and the third layer of spring driving mechanism are respectively at 140° and 45°; when the main shaft rotates to 45°, the first layer of transmission arm and the first layer of spring driving mechanism are respectively at 140° and 45°, the second layer of transmission arm and the second layer of spring driving mechanism are respectively at 50° and 0°, the third layer of transmission arm and the third layer of spring driving mechanism are respectively at 185° and 90°, and the third layer of transmission arm and the third layer of spring driving mechanism are respectively at 185° and 90°. When the driving mechanism is at 90°, it drives the slider to close the main contact at the same time. Due to the characteristics of the crankshaft, the three-layer transmission arm changes from the original pulling force to the thrust force; when the main shaft rotates to 90°, the first layer of transmission arm and the first layer of spring driving mechanism are at 185° and 90° respectively, and drive the corresponding slider to close the main contact at the same time. Due to the characteristics of the crankshaft, the first layer of transmission arm changes from the original pulling force to the thrust force and the first layer enters the idling state, the second layer of transmission arm and the second layer of spring driving mechanism are at 95° and 0° respectively, the third layer of transmission arm and the third layer of spring driving mechanism are at 230° and 45° respectively; when the main shaft rotates to 135°, the first layer of transmission arm and the first layer of spring driving mechanism are at 230° and 45° respectively. and 90°, the layer enters the idling state, the second layer transmission arm and the second layer spring driving mechanism are respectively at 140° and 45°, the third layer transmission arm and the third layer spring driving mechanism are respectively at 275° and 0°, when the third layer spring driving mechanism is at 0°, it drives the corresponding slider to push away the main contact to realize disconnection; when the main shaft rotates to 180°, the first layer transmission arm and the first layer spring driving mechanism are respectively at 275° and 45°, the first layer transmission arm generates thrust, the second layer transmission arm and the second layer spring driving mechanism are respectively at 185° and 90°, driving the corresponding slider to realize the closing of the main contact, the third layer transmission arm and the third layer spring driving mechanism are respectively at 320° and 0°, the layer idling, following the disconnection state;When the main shaft rotates to 225°, the first layer transmission arm and the first layer spring drive mechanism are at 320° and 0° respectively, driving the corresponding slider to push away the main contact to achieve disconnection, the second layer transmission arm and the second layer spring drive mechanism are at 230° and 45° respectively, the third layer transmission arm and the third layer spring drive mechanism are at 5° and 0° respectively, this layer idles and follows the disconnection state; when the main shaft rotates to 270°, the first layer transmission arm and the first layer spring drive mechanism are at 5° and 0° respectively, this layer idles and follows the disconnection state, the second layer transmission arm and the second layer spring drive mechanism are at 275° and 0° respectively, driving the corresponding slider to push away the main contact to achieve disconnection, the third layer transmission arm and the third layer spring drive mechanism are at 50° and 0° respectively, this layer idles and follows the disconnection state; when the main shaft rotates another 90° to 0°, the three-layer transmission mechanism returns to the initial position. ;

[0007] Furthermore, the main shaft is provided with four gears, namely 0°, 90°, 180° and 270°, the maximum rotation angle is 90°, the rotation cycle is 360°, and the transmission arm is provided with a 5° difference to avoid the thrust and pull being equal when in a horizontal position.

[0008] Furthermore, the spring drive mechanism is activated only when the angle is greater than or equal to 90°.

[0009] Furthermore, when the transmission arm is less than 180°, it drives the connecting rod to generate a pulling force; when it is greater than 180°, it drives the connecting rod to generate a thrust.

[0010] Furthermore, the transmission mechanism can also be replaced by a motor transmission mode and a through-axis double-pulling-arm and double-connecting-rod transmission mode.

[0011] Furthermore, the transmission mechanism realizes star-delta starting switching when it is at 180°.

[0012] Furthermore, the transmission arm is connected to the main shaft by welding or clamping.

[0013] Furthermore, a travel groove is provided on the top of the connecting rod, and the degree of idling is controlled by the length of the travel groove.

[0014] Furthermore, the spring deformation range is 0°-90°.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present invention has the following beneficial effects: the present invention has a simple and reasonable structure, adopts a three-layer full mechanical structure design, has a more stable structure, and realizes complete star-delta starting, combining reduced pressure and full pressure, has high product safety performance, and truly realizes the mechanical emergency starting required by fire protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the transmission mechanism of the present invention.

[0020] Figure 3 It is a schematic diagram of a rotating handle of the present invention.

[0021] Figure 4 It is a schematic diagram of the back structure of the present invention.

[0022] 1-rotating handle; 2-device assembly; 3-contact terminal; 4-main shaft; 5-first-layer transmission arm; 6-second-layer transmission arm; 7-third-layer transmission arm; 8-third-layer connecting rod; 9-second-layer connecting rod; 10-first-layer connecting rod; 11-slider; 12-spring; 13-driving rod. DETAILED DESCRIPTION

[0023] As shown in the attached drawings, a star-delta emergency starting device for fire-fighting machinery comprises a device component 2 and a transmission mechanism, wherein a main rotating shaft 4 is installed inside the device component 2, a rotating handle 1 is installed at the top of the main rotating shaft 4, a first-layer transmission arm 5, a second-layer transmission arm 6 and a third-layer transmission arm 7 are installed on the main rotating shaft 4, respectively, and the transmission arms are connected with corresponding first-layer connecting rods 10, second-layer connecting rods 9 and third-layer connecting rods 8, respectively, a spring 12 and a driving rod 13 are installed below one end of the connecting rod, the connecting rod, spring 12 and driving rod 13 respectively constitute a first-layer spring driving mechanism, a second-layer spring driving mechanism and a third-layer spring driving mechanism, corresponding sliders 11 are installed below the spring driving mechanism, and clamping members are installed on both sides of the slider 11 , the slider 11 slides up and down under the action of the spring drive mechanism. When sliding down, the clamping member is closed with the main contact to realize the closing function. When the main shaft 4 is at 0° and not working, the first layer of transmission arm 5 and the first layer of spring drive mechanism are respectively at 95° and 0°, the second layer of transmission arm 6 and the second layer of spring drive mechanism are respectively at 5° and 0°, and the third layer of transmission arm 7 and the third layer of spring drive mechanism are respectively at 140° and 45°; when the main shaft 4 rotates to 45°, the first layer of transmission arm 5 and the first layer of spring drive mechanism are respectively at 140° and 45°, the second layer of transmission arm 6 and the second layer of spring drive mechanism are respectively at 50° and 0°, and the third layer of transmission arm 7 and the third layer of spring drive mechanism are respectively at 185° and 9 0°, when the spring drive mechanism is at 90°, it drives the slider 11 to close the main contact at the same time. Due to the characteristics of the crankshaft, the three-layer transmission arm 7 changes from the original pulling force to the thrust force; when the main shaft 4 rotates to 90°, the first layer of transmission arm 5 and the first layer of spring drive mechanism are respectively at 185° and 90°, and at the same time drives the corresponding slider 11 to close the main contact. Due to the characteristics of the crankshaft, the first layer of transmission arm 5 changes from the original pulling force to the thrust force and the first layer enters the idling state, the second layer of transmission arm 6 and the second layer of spring drive mechanism are respectively at 95° and 0°, the third layer of transmission arm 7 and the third layer of spring drive mechanism are respectively at 230° and 45°; when the main shaft 4 rotates to 135°, the first layer of transmission arm 5 and the first layer of spring drive mechanism are respectively at 230° and 90°, the layer enters the idling state, the second layer transmission arm 6 and the second layer spring driving mechanism are respectively at 140° and 45°, the third layer transmission arm 7 and the third layer spring driving mechanism are respectively at 275° and 0°, when the third layer spring driving mechanism is at 0°, it drives the corresponding slider 11 to push away the main contact to realize disconnection; when the main shaft 4 rotates to 180°, the first layer transmission arm 5 and the first layer spring driving mechanism are respectively at 275° and 45°, the first layer transmission arm 5 generates thrust, the second layer transmission arm 6 and the second layer spring driving mechanism are respectively at 185° and 90°, driving the corresponding slider 11 to realize the main contact closure, the third layer transmission arm 7 and the third layer spring driving mechanism are respectively at 320° and 0°, the layer idling, following the disconnection state;When the main shaft 4 rotates to 225°, the first layer transmission arm 5 and the first layer spring drive mechanism are respectively at 320° and 0°, driving the corresponding slider 11 to push away the main contact to achieve disconnection, the second layer transmission arm 6 and the second layer spring drive mechanism are respectively at 230° and 45°, the third layer transmission arm 7 and the third layer spring drive mechanism are respectively at 5° and 0°, and this layer is idling and follows the disconnection state; when the main shaft 4 rotates to 270°, the first layer transmission arm 5 and the first layer spring drive mechanism are respectively at 5° and 0°, and this layer is idling and follows the disconnection state, the second layer transmission arm 6 and the second layer spring drive mechanism are respectively at 275° and 0°, driving the corresponding slider 11 to push away the main contact to achieve disconnection, the third layer transmission arm 7 and the third layer spring drive mechanism are respectively at 50° and 0°, and this layer is idling and follows the disconnection state; when the main shaft 4 rotates another 90° to reach 0°, the three-layer transmission mechanism returns to its initial position;

[0024] The main shaft 4 is provided with four gears, namely 0°, 90°, 180° and 270°, the maximum rotation angle is 90°, the rotation cycle is 360°, and the transmission arm is provided with a 5° difference to avoid the thrust and pull being equal when in a horizontal position;

[0025] The spring drive mechanism will only work when the angle is greater than or equal to 90°;

[0026] When the transmission arm is less than 180°, it drives the connecting rod to generate a pulling force; when it is greater than 180°, it drives the connecting rod to generate a thrust;

[0027] The transmission mechanism can also be replaced by a motor transmission method and a through-axis double-pulling arm and double-connecting rod transmission method;

[0028] When the transmission mechanism is at 180°, star-delta starting switching is realized;

[0029] The transmission arm is connected to the main shaft 4 by welding or clamping;

[0030] A travel groove is provided on the connecting rod, and the length of the travel groove is used to control the degree of idling;

[0031] The deformation range of the spring 12 is 0°-90°.

[0032] The invention has a simple and reasonable structure, adopts a three-layer full mechanical structure design, has a more stable structure, and realizes complete star-delta starting, combining reduced pressure and full pressure. The product has high safety performance and truly realizes the mechanical emergency starting required by fire protection.

[0033] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A star-delta emergency starting device for fire fighting machinery, comprising a device component (2) and a transmission mechanism, characterized in that: The device assembly (2) is provided with a main rotating shaft (4) inside, and a rotating handle (1) is provided at the top of the main rotating shaft (4). A first-layer transmission arm (5), a second-layer transmission arm (6) and a third-layer transmission arm (7) are provided on the main rotating shaft (4), respectively. The transmission arms are connected with corresponding first-layer connecting rods (10), second-layer connecting rods (9) and third-layer connecting rods (8), respectively. A spring (12) and a driving rod (13) are provided below one end of the connecting rod. The connecting rod, spring (12) and driving rod (13) respectively form a first-layer spring driving mechanism, a second-layer spring driving mechanism and a third-layer spring driving mechanism, and corresponding sliders (11) are provided below the spring driving mechanisms. , clamping parts are installed on both sides of the slider (11), and the slider (11) can slide up and down under the action of the spring drive mechanism. When sliding down, the clamping parts are closed with the main contact to realize the closing function. When the main shaft (4) is at 0° and not working, the first layer of transmission arm (5) and the first layer of spring drive mechanism are respectively in the state of 95° and 0°, the second layer of transmission arm (6) and the second layer of spring drive mechanism are respectively in the state of 5° and 0°, and the third layer of transmission arm (7) and the third layer of spring drive mechanism are respectively in the state of 140° and 45°; when the main shaft (4) rotates to 45°, the first layer of transmission arm (5) and the first layer of spring drive mechanism are respectively in the state of 140° and 45°, and the second layer of transmission arm (6) and the second layer of spring drive mechanism are respectively in the state of 5° and 0°. The first layer transmission arm (6) and the second layer spring driving mechanism are at 50° and 0° respectively, the third layer transmission arm (7) and the third layer spring driving mechanism are at 185° and 90° respectively, when the spring driving mechanism is at 90°, the slider (11) is driven at the same time to close the main contact, due to the characteristics of the crankshaft, the third layer transmission arm (7) changes from the original pulling force to the thrust; when the main shaft (4) rotates to 90°, the first layer transmission arm (5) and the first layer spring driving mechanism are at 185° and 90° respectively, and the corresponding slider (11) is driven at the same time to close the main contact, due to the characteristics of the crankshaft, the first layer transmission arm (5) changes from the original pulling force to the thrust and the first layer enters the idling state, and the second layer The transmission arm (6) and the second-layer spring drive mechanism are respectively at 95° and 0°, and the third-layer transmission arm (7) and the third-layer spring drive mechanism are respectively at 230° and 45°; when the main shaft (4) rotates to 135°, the first-layer transmission arm (5) and the first-layer spring drive mechanism are respectively at 230° and 90°, and the layer where the first-layer transmission arm (5) and the first-layer spring drive mechanism are located enters an idling state, the second-layer transmission arm (6) and the second-layer spring drive mechanism are respectively at 140° and 45°, and the third-layer transmission arm (7) and the third-layer spring drive mechanism are respectively at 275° and 0°. When the third-layer spring drive mechanism is at 0°, it drives the corresponding slider (11) to push away from the main contact to achieve disconnection;When the main rotating shaft (4) rotates to 180°, the first layer transmission arm (5) and the first layer spring driving mechanism are respectively at 275° and 45°, the first layer transmission arm (5) generates thrust, the second layer transmission arm (6) and the second layer spring driving mechanism are respectively at 185° and 90°, driving the corresponding slider (11) to close the main contact, the third layer transmission arm (7) and the third layer spring driving mechanism are respectively at 320° and 0°, the layer where the third layer transmission arm (7) and the third layer spring driving mechanism are located is idle, and follows the disconnection state; when the main rotating shaft (4) rotates to 180°, the first layer transmission arm (5) and the second layer spring driving mechanism generate thrust, the second layer transmission arm (6) and the second layer spring driving mechanism are respectively at 185° and 90°, driving the corresponding slider (11) to close the main contact, the third layer transmission arm (7) and the third layer spring driving mechanism are respectively at 320° and 0°, and the layer where the third layer transmission arm (7) and the third layer spring driving mechanism are located is idle, and follows the disconnection state; When the shaft (4) rotates to 225°, the first-layer transmission arm (5) and the first-layer spring drive mechanism are respectively at 320° and 0°, driving the corresponding slider (11) to push away the main contact to achieve disconnection, the second-layer transmission arm (6) and the second-layer spring drive mechanism are respectively at 230° and 45°, the third-layer transmission arm (7) and the third-layer spring drive mechanism are respectively at 5° and 0°, and the layer where the third-layer transmission arm (7) and the third-layer spring drive mechanism are located is idle and follows the disconnection state; when the main shaft (4) rotates to 270°, the first-layer transmission arm (6) and the second-layer spring drive mechanism are respectively at 230° and 45°, and the third-layer transmission arm (7) and the third-layer spring drive mechanism are respectively at 5° and 0°. The arm (5) and the first layer of spring drive mechanism are respectively at 5° and 0°, the third layer of transmission arm (7) and the layer where the third layer of spring drive mechanism is located are idle, and follow the disconnection state, the second layer of transmission arm (6) and the second layer of spring drive mechanism are respectively at 275° and 0°, driving the corresponding slider (11) to push away the main contact to achieve disconnection, the third layer of transmission arm (7) and the third layer of spring drive mechanism are respectively at 50° and 0°, the third layer of transmission arm (7) and the layer where the third layer of spring drive mechanism is located are idle, and follow the disconnection state; when the main shaft (4) rotates again After turning 90° and reaching 0°, the three-layer transmission mechanism returns to the initial position; the main shaft (4) is provided with four gears, namely 0°, 90°, 180° and 270°, the maximum rotation angle is 90°, the rotation cycle is 360°, and the transmission arm is provided with a 5° difference to avoid the thrust and pull being equal when in the horizontal position; the spring drive mechanism is activated only when the angle is greater than or equal to 90°; a travel slot is provided above the connecting rod, and the degree of idling is controlled by the length of the travel slot. ; 2. A star-delta emergency starting device for fire fighting machinery according to claim 1, characterized in that: When the transmission arm is less than 180 degrees, it drives the connecting rod to generate a pulling force; when it is greater than 180 degrees, it drives the connecting rod to generate a thrust.

3. A star-delta emergency starting device for fire fighting machinery according to claim 1, characterized in that: The transmission mechanism is replaced by a motor transmission mode and a through-axis double-pulling arm and double-connecting rod transmission mode.

4. A star-delta emergency starting device for fire fighting machinery according to claim 1, characterized in that: When the transmission mechanism is at 180°, star-delta starting switching is realized.

5. A star-delta emergency starting device for fire fighting machinery according to claim 1, characterized in that: The transmission arm is connected to the main shaft (4) by welding or clamping.

6. A star-delta emergency starting device for fire fighting machinery according to claim 1, characterized in that: The deformation range of the spring (12) is 0°-90°.

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