A combined interlocking propulsion mechanism for a low-voltage switch drawer cabinet and its usage method

Abstract

The present invention discloses a combined interlocking propulsion mechanism for a low-voltage switch drawer cabinet and a method for using the mechanism. The mechanism comprises a hand-pull interlocking mechanism and a rocking mechanism, wherein the hand-pull interlocking mechanism and the rocking mechanism are mounted side by side on a front lower bracket. The hand-pull interlocking mechanism comprises a working status display panel and a propulsion mechanism interlocking component. A through hole is provided at the end of the propulsion mechanism interlocking component. The rocking mechanism is disposed on one side of the through hole. A crank handle hole is provided on the front of the rocking mechanism. When the working status display panel is moved from a separation position to a test position, the through hole deviates from the crank handle hole. When the working status display panel is moved from a test position to a connection position, the through hole and the crank handle hole coincide with each other. When moving from the separation position to the test position, the through hole deviates from the crank handle hole, allowing a portion of the drawer to be pulled out by the hand-pull interlocking mechanism. When moving from the test position to the connection position, the through hole and the crank handle hole coincide with each other, and the drawer can be opened by inserting the crank handle through the rocking mechanism.

Description

Technical Field

[0001] The present invention relates to the field of electric power equipment, in particular to a combined interlocking propulsion mechanism for a low-voltage switch drawer cabinet and a use method thereof. Background Art

[0002] In drawer-type switchgear, functional units are separated from busbars or cables by grounded metal or plastic panels, creating three zones: busbar, functional unit, and cable. Each functional unit is also isolated from the others. Drawer-type switchgear offers high reliability, safety, and interchangeability, making it a relatively advanced type of switchgear. The majority of switchgear manufactured is of the drawer type. Low-voltage drawer-type switchgear is widely used in power distribution stations, factories, industrial and mining enterprises, nuclear power plants, and buildings.

[0003] However, drawer interlock mechanisms currently available on the market fall into two broad categories: manual pull mechanisms, which require manual insertion and removal, are laborious for high-current drawer insertion and removal; and swing-in mechanisms, which rely on a roller-screw plate for sliding movement. This is labor-efficient but also expensive, increasing costs for low-current drawers. Existing closing interlocks are mechanically interlocked with components such as the interlocking rod, resulting in significant resistance when the circuit breaker trips.

[0004] Therefore, we propose a combined interlocking propulsion mechanism for a low-voltage switch drawer cabinet and a method of using the same to improve the above-mentioned deficiencies. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a combined interlocking propulsion mechanism for a low-voltage switch drawer cabinet and a method of using the same. When moving from the separation position to the test position, the through hole deviates from the crank hole, and part of the drawer can be pulled out by hand-pulling the interlocking mechanism. When moving from the test position to the connection position, the through hole coincides with the crank hole by pressing the unlocking button, and the crank is inserted to open the drawer through the cranking mechanism.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a combined interlocking propulsion mechanism of a low-voltage switch drawer cabinet, comprising a hand-pull interlocking mechanism and a rocking-in mechanism, the hand-pull interlocking mechanism and the rocking-in mechanism being installed side by side on the front lower bracket, the hand-pull interlocking mechanism comprising a working status display panel and a propulsion mechanism interlocking component, a through hole being provided at the end of the propulsion mechanism interlocking component, the rocking-in mechanism being provided on one side of the through hole, a crank hole being provided on the front side of the rocking-in mechanism, and when the working status display panel is moved from the separation position to the test position, the through hole deviates from the crank hole, and when the working status display panel is moved from the test position to the connection position, the through hole coincides with the crank hole.

[0007] As a preferred technical solution of the present invention, a drawer is fixedly installed on the top of the front lower bracket.

[0008] As a preferred technical solution of the present invention, a button rod is connected to the side of the hand-pull interlocking mechanism, a interlocking rod is provided on the top of the hand-pull interlocking mechanism, a closing interlocking component is installed on one side of the interlocking rod, an electric interlocking microswitch is installed on the top of the hand-pull interlocking mechanism, a test position microswitch is installed on the top of the hand-pull interlocking mechanism, a lock tongue is provided at the bottom of the hand-pull interlocking mechanism, and a position display driving rod is installed at the bottom of the hand-pull interlocking mechanism.

[0009] As a preferred technical solution of the present invention, a notch is provided at the connection position between the closing interlocking component and the interlocking rod.

[0010] As a preferred technical solution of the present invention, the working status display panel includes a separation status display screen, a test status display screen and a connection status display screen.

[0011] As a preferred technical solution of the present invention, a limiting hole is opened on the back of the rocking-in mechanism, a positioning sound spring top is installed on the back of the rocking-in mechanism, a limiting lock plate is provided at the rear of the rocking-in mechanism, and a propulsion roller is installed through the lower inner side of the rocking-in mechanism.

[0012] As a preferred technical solution of the present invention, a layer plate is arranged under the front lower bracket, and locking holes are arranged on the front lower bracket and the layer plate at positions corresponding to the lock tongue. A layer plate block is also installed on the front lower bracket, and one end of the layer plate block blocks the lock tongue and the other end blocks the position display driving rod, fixing the relative position relationship between the position display driving rod and the lock tongue.

[0013] As a preferred technical solution of the present invention, the layer block is a Z-shaped block.

[0014] As a preferred technical solution of the present invention, threaded plates are installed through the front lower bracket and the lower layer plate at positions corresponding to the propulsion rollers, and limiting guide rails are installed on the sides.

[0015] A method for using a combined interlocking propulsion mechanism of a low-voltage switch drawer cabinet, the method comprising the following steps:

[0016] S1: Press and hold the button rod to raise the lock tongue, push and pull out the drawer, and the position display drive rod contacts the shelf stop to display the drawer position; after releasing the button rod, the lock tongue pops down through the front lower bracket and inserts into the locking hole of the shelf to achieve position locking;

[0017] S2: Rotate the circuit breaker operating handle clockwise to the connected position, thereby driving the rotation of the closing interlock component. The notch on the interlock component moves away from the position of the interlock rod, locking the interlock component of the push mechanism. The lever prevents the button rod from being pressed to unlock, thus achieving the safety requirement that the drawer cannot be inserted or removed when the main circuit is energized.

[0018] S3: Pressing the button lever will drive the locking component of the push mechanism to move to the left, lifting the locking rod through the notch and inserting it into the notch of the closing locking component. If the lock tongue is not in the locking hole position, the lock tongue cannot pop down, thus achieving the safety requirement that the switch cannot be opened or closed until the drawer reaches the connection position;

[0019] S4: When the button lever is pressed and the drawer is pushed to the test position, the limit lock plate of the rocking mechanism contacts the threaded block of the front lower bracket and lifts up, thereby unlocking the rocking mechanism's push roller. When the button lever is pressed, the interlocking component of the push mechanism moves to the left to expose the crank handle hole. Inserting the crank handle can rock the push roller, which slides with the threaded plate installed on the shelf to push the drawer forward.

[0020] S5: After the crank handle is pulled out to the connection position, the lock tongue of the hand-pull interlocking mechanism bounces down into the locking hole of the shelf, and at the same time drives the interlocking component of the mechanism to return to its original position, thereby covering the crank handle hole of the rocking mechanism.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The rocking mechanism is used in combination with the hand-pull interlocking mechanism. When the button rod is pressed to push the drawer to the test position, the limit lock piece of the rocking mechanism contacts the threaded plate and lifts up, thereby unlocking the propulsion roller of the rocking mechanism. When the drawer is pulled out, the limit lock is reset by the spring and locks the propulsion roller to avoid the wrong starting position of the propulsion roller due to misoperation.

[0023] 2. The closing interlocking component of this mechanism is a separate part, which is interlocked by the notch, and will not cause resistance to the circuit breaker tripping. It is easier to achieve the handle indicating the tripping position when the circuit breaker trips. At the same time, the notch on the surface of the closing interlocking component leaves the position of the interlocking rod, thereby locking the interlocking component of the propulsion mechanism, so that the button rod cannot be pressed to unlock, thereby achieving the safety requirement that the main circuit cannot be plugged in or pulled out when it is energized. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a complete structural diagram of the present invention;

[0025] Figure 2 This is a structural diagram of the hand-pull interlocking mechanism of the present invention;

[0026] Figure 3 This is a bottom perspective structural diagram of the hand-pull chain mechanism of the present invention;

[0027] Figure 4 It is a structural diagram of the rocking mechanism of the present invention;

[0028] Figure 5 This is a diagram of the connection structure of the position-limiting guide rail piece of the present invention;

[0029] Figure 6 This is a structural diagram of the swing-in mechanism of the present invention from the back view;

[0030] Figure 7 This is a diagram showing the connection structure of the hand-pull chain mechanism of the present invention;

[0031] Figure 8 It is the installation structure diagram of the rocking mechanism of the present invention.

[0032] Among them: 1. Hand-pull interlocking mechanism; 2. Swing-in mechanism; 3. Front lower bracket; 4. Drawer; 5. Push button rod; 6. Working status display panel; 7. Interlocking rod; 8. Closing interlocking component; 9. Electric interlocking microswitch; 10. Test position microswitch; 11. Push mechanism interlocking component; 12. Lock tongue; 13. Position display driving rod; 14. Crank handle hole; 15. Push roller; 16. Shelf stopper; 17. Separation partition; 18. Threaded plate; 19. Limiting guide plate; 20. Limiting hole; 21. Positioning sound spring top; 22. Limiting locking plate; 23. Channel steel; 24. Handle; 25 Shelf. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, purpose and efficacy of the present invention easy to understand, the present invention is further described below in conjunction with specific examples, but the following examples are only preferred embodiments of the present invention, not all. Based on the examples in the embodiments, other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention. The test methods in the following examples, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following examples, unless otherwise specified, can be obtained from commercial channels.

[0034] like Figure 1-8As shown, a combined interlocking propulsion mechanism for a low-voltage switch drawer cabinet includes a hand-pull interlocking mechanism 1 and a rocking mechanism 2. The bottom of the hand-pull interlocking mechanism 1 is connected to a front lower bracket 3, and a drawer 4 is fixedly installed on the top of the front lower bracket 3. A button rod 5 is connected to the side of the hand-pull interlocking mechanism 1, and a working status display panel 6 is provided on one side of the hand-pull interlocking mechanism 1. A locking rod 7 is provided on the top of the hand-pull interlocking mechanism 1, and a closing interlocking component 8 is installed on one side of the locking rod 7. A notch is provided at the connection between the closing interlocking component 8 and the locking rod 7. An electric interlocking microswitch 9 is installed on the top of the hand-pull interlocking mechanism 1, a test position microswitch 10 is installed on the top of the hand-pull interlocking mechanism 1, a propulsion mechanism interlocking component 11 is installed on one side of the hand-pull interlocking mechanism 1, a lock tongue 12 is provided at the bottom of the hand-pull interlocking mechanism 1, and a position display driving rod 13 is installed at the bottom of the hand-pull interlocking mechanism 1. A crank handle hole 14 is opened on the front of the rocking mechanism 2, and a propulsion roller 15 is installed through the interior of the rocking mechanism 2. The end of the propulsion mechanism interlocking member 11 is provided with a through hole, and the cranking mechanism 2 is provided on one side of the through hole. A crank handle hole 14 is provided on the front of the cranking mechanism 2. The cranking mechanism 2 is used in combination with the hand-pull interlocking mechanism 1. When the working status display panel 6 is moved from the separation position to the test position, the through hole deviates from the crank handle hole 14, and the drawer 4 can be partially pulled out by the hand-pull interlocking mechanism 1. When the working status display panel 6 is moved from the test position to the connection position, the through hole coincides with the crank handle hole 14, and the drawer can be opened by inserting the crank handle through the cranking mechanism 2.

[0035] By combining the rocking mechanism 2 with the hand-pull interlocking mechanism 1, when the button rod 5 is pressed to push the drawer 4 to the test position, the limit lock piece 22 of the rocking mechanism 2 contacts the threaded plate 18 and lifts up, thereby unlocking the propulsion roller 15 of the rocking mechanism 2. When the drawer 4 is pulled out, the limit lock piece 22 is reset by the spring and locks the propulsion roller 15 to avoid the wrong starting position of the propulsion roller 15 due to misoperation by personnel.

[0036] The closing interlocking components 8 currently on the market are all mechanically interlocked with the interlocking rod 7 and other components, which will cause relatively large resistance when the circuit breaker is tripped, and the operating handle cannot be rotated to the tripping position. However, the closing interlocking component 8 of this mechanism is a separate component, which relies on the notch to achieve interlocking, and will not cause resistance to the circuit breaker tripping, and it is easier to achieve that the handle indicates the tripping position when the circuit breaker is tripped. The closing interlocking component 8 of the mechanism of the present invention is a separate component, which relies on the notch to achieve interlocking, and will not cause resistance to the circuit breaker tripping, and it is easier to achieve that the handle indicates the tripping position when the circuit breaker is tripped. At the same time, the notch on the surface of the closing interlocking component 8 leaves the position of the interlocking rod 7, and locks the propulsion mechanism interlocking component 11, so that the button rod 5 cannot be pressed to unlock, thereby achieving the safety requirement that the main circuit cannot be plugged in or pulled out when it is energized.

[0037] In other embodiments, the working status display panel 6 includes a separation status display screen, a test status display screen, and a connection status display screen. By setting a split-screen working status display panel 6, intuitive observation of each working status of the hand-pull chain mechanism 1 is facilitated.

[0038] In other embodiments, a locking hole is provided on the shelf at a position corresponding to the lock tongue 12, and a shelf stopper 16 is also installed on the shelf. The shelf stopper 16 is a Z-shaped block, with one end blocking the lock tongue 12 and the other end blocking the position display drive rod 13. The fixed position displays the relative position relationship between the drive rod 13 and the lock tongue 12. A separation layer 17 is provided at one end of the front lower bracket 3. Pressing the button rod 5 will raise the lock tongue 12, allowing the drawer 4 to be pushed in and out, and the position display drive rod 13 will contact the shelf stopper 16, thereby displaying the position of the drawer 4.

[0039] In other embodiments, a threaded plate 18 is installed through the interior of the front lower bracket 3 and the position on the shelf corresponding to the propulsion roller 15, and a limiting guide rail 19 is installed on the side. The propulsion roller 15 is pushed by shaking and slides with the threaded plate 18 on the shelf to push the drawer 4.

[0040] In other embodiments, a limiting hole 20 is provided on the back of the rocking mechanism 2, a positioning sound spring top 21 is installed on the back of the rocking mechanism 2, and a limiting lock plate 22 is provided at the bottom of the rocking mechanism 2. By rocking the handle twice, a twenty-four millimeter stroke from the test position to the connection position is reached, and the positioning sound spring top 21 will make a clicking sound when it reaches the two positions, to provide an audible prompt that it is in place.

[0041] When the button rod 5 is pressed to push the drawer 4 to the test position, the limit lock piece 22 of the rocking mechanism 2 contacts the threaded plate 18 and lifts up, thereby unlocking the propulsion roller 15 of the rocking mechanism 2. When the drawer 4 is pulled out, the limit lock piece 22 is reset by the spring and locks the propulsion roller 15 to avoid the wrong starting position of the propulsion roller 15 caused by misoperation.

[0042] In other embodiments, a channel steel 23 is installed on one side of the drawer 4, and the channel steel 23 is respectively arranged at the four end corners of the drawer 4. By respectively setting the channel steel 23 at the four end corners of the drawer 4, it is beneficial to improve the stability of the installation of the drawer 4.

[0043] In other embodiments, a handle 24 is installed on the front of the drawer 4. The handle 24 facilitates pulling out the drawer 4.

[0044] When the button rod 5 is pressed and held, the lock tongue 12 rises, and the drawer 4 can be pushed and pulled out. The position display driving rod 13 contacts the layer stopper 16, thereby realizing the display of the position of the drawer 4. After releasing the button rod 5, the lock tongue 12 pops up downward and is inserted into the locking hole of the layer to realize position locking. When the circuit breaker operating handle is rotated clockwise, the closing interlocking component 8 is driven to rotate, and the position of the interlocking rod 7 is left through the notch on the surface of the closing interlocking component 8, thereby locking the pushing mechanism interlocking component 11, so that the button rod 5 cannot be pressed to unlock, thereby realizing the safety requirement that the main circuit cannot be plugged in and out when it is energized. When the button rod 5 is pressed and held, the interlocking component 11 of the pushing mechanism is driven to move to the left, and the interlocking rod 7 is lifted and inserted into the groove of the closing interlocking component 8. If the lock tongue 12 is not in the locking hole When the drawer 4 is not in the connected position, the lock tongue 12 cannot pop up downward, thereby achieving the safety requirement that the switch cannot be opened and closed before the drawer 4 reaches the connected position. When the button rod 5 is pressed, the locking component 11 of the push mechanism is driven to move to the left to expose the crank hole 14. The inserted crank can be pushed to push the push roller 15 by shaking, and slide with the threaded plate 18 on the layer plate to push the drawer 4. The limit pin limits the push roller 15, and the 24 mm stroke from the test position to the connected position is reached by shaking the crank handle twice, and the positioning sound spring top 21 will have a click sound when it reaches the two positions, which prompts it to be in place with sound. After the crank handle is pulled out at the connected position, the lock tongue 12 of the hand-pull chain mechanism 1 pops down into the locking hole of the layer plate, and at the same time drives the hand-pull chain mechanism 1 to return to its position, while blocking the operating hole of the rocking mechanism 2.

[0045] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0046] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined interlocking propulsion mechanism for a low-voltage switch drawer cabinet, characterized in that: The invention comprises a hand-pull interlocking mechanism (1) and a rocking mechanism (2), wherein the hand-pull interlocking mechanism (1) and the rocking mechanism (2) are mounted side by side on a front lower bracket (3), the hand-pull interlocking mechanism (1) comprises a working state display panel (6) and a propulsion mechanism interlocking component (11), a through hole is provided at the end of the propulsion mechanism interlocking component (11), the rocking mechanism (2) is provided on one side of the through hole, a crank hole (14) is provided on the front of the rocking mechanism (2), when the working state display panel (6) is moved from the separation position to the test position, the through hole deviates from the crank hole (14), and when the working state display panel (6) is moved from the test position to the connection position, the through hole coincides with the crank hole (14); A limiting hole (20) is provided on the back of the rocking mechanism (2), a positioning sound-generating spring (21) is installed on the back of the rocking mechanism (2), a limiting locking piece (22) is provided at the rear of the rocking mechanism (2), and a propulsion roller (15) is installed through the lower side of the interior of the rocking mechanism (2); A threaded plate (18) is installed through the front lower bracket (3) and the lower layer plate at a position corresponding to the propulsion roller (15), and a limiting guide rail (19) is installed on the side.

2. The combined interlocking propulsion mechanism of a low-voltage switch drawer cabinet according to claim 1, characterized in that: A drawer (4) is fixedly mounted on the top of the front lower bracket (3).

3. The combined interlocking propulsion mechanism of a low-voltage switch drawer cabinet according to claim 1, characterized in that: The side of the hand-pull interlocking mechanism (1) is connected to a button rod (5), the top of the hand-pull interlocking mechanism (1) is provided with a interlocking rod (7), one side of the interlocking rod (7) is installed with a closing interlocking component (8), the top of the hand-pull interlocking mechanism (1) is installed with an electric interlocking microswitch (9), the top of the hand-pull interlocking mechanism (1) is installed with a test position microswitch (10), the bottom of the hand-pull interlocking mechanism (1) is provided with a lock tongue (12), and the bottom of the hand-pull interlocking mechanism (1) is installed with a position display driving rod (13).

4. The combined interlocking propulsion mechanism of a low-voltage switch drawer cabinet according to claim 3, characterized in that: A notch is provided at the connection position between the closing interlocking component (8) and the interlocking rod (7).

5. The combined interlocking propulsion mechanism of a low-voltage switch drawer cabinet according to claim 3, characterized in that: The working status display panel (6) comprises a separation status display screen, a test status display screen and a connection status display screen.

6. The combined interlocking propulsion mechanism of a low-voltage switch drawer cabinet according to claim 3, characterized in that: A layer plate is provided below the front lower bracket (3), and locking holes are provided on the front lower bracket (3) and the layer plate at positions corresponding to the lock tongue (12). A layer plate stopper (16) is also installed on the front lower bracket (3), and one end of the layer plate stopper (16) blocks the lock tongue (12) and the other end blocks the position display driving rod (13), thereby fixing the relative position relationship between the position display driving rod (13) and the lock tongue (12).

7. The combined interlocking propulsion mechanism of a low-voltage switch drawer cabinet according to claim 6, characterized in that: The layer plate stopper (16) is a Z-shaped stopper.

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