A double-shaft quick-opening high-current valve mechanism

Abstract

The present invention discloses a more responsive dual-shaft quick-opening, high-current valve mechanism. The technical solution employed includes a valve mechanism and a locking mechanism, characterized in that the valve mechanism primarily comprises a base, an upper crank arm, a lower crank arm, an upper valve push rod, a lower valve push rod, an upper rotating shaft, a lower rotating shaft, a driving bent plate, and a torsion spring. The upper and lower rotating shafts are fixed to the front end of the base at intervals, and the upper and lower valve push rods are fixed to the rear ends of the upper and lower crank arms, respectively. The upper and lower crank arms are rotatable about the upper and lower rotating shafts, respectively, and the torsion spring is used to reset the upper crank arm.

Description

Technical Field

[0001] The invention relates to a high-current valve mechanism of a high-voltage switch cabinet. Background Art

[0002] The KYN28 series switchgear has been used in my country's power industry for many years, with an increasingly wide range of applications and increasing ease of use. However, some problems have been discovered during use, such as frequent scraping between the plum blossom contacts and the valve plate during the swing-in and swing-out of high-current trolleys. Everyone knows that the problem can be solved by speeding up the opening of the valve. However, despite the various solutions that engineers and technicians have devised over the years, the results have been far from ideal, and the problem has not been fundamentally resolved. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a double-shaft quick-opening high-current valve mechanism with a more sensitive response.

[0004] In order to solve the above problems, the technical solution adopted by the present invention includes: a valve mechanism and a locking mechanism, characterized in that: the valve mechanism includes a base, an upper crank arm, a lower crank arm, an upper valve push rod, a lower valve push rod, an upper rotating shaft, a lower rotating shaft and a torsion spring, the upper rotating shaft and the lower rotating shaft are fixed at intervals to the front end of the base, the upper valve push rod and the lower valve push rod are respectively fixed to the rear ends of the upper crank arm and the lower crank arm, the upper crank arm and the lower crank arm can rotate around the upper rotating shaft and the lower rotating shaft respectively, and the torsion spring is used to reset the upper crank arm; when the trolley moves from the test position to the working position, the torsion spring installed on the trolley The driving bending plate synchronously supports the upper valve push rod and the lower valve push rod, so that the upper turning arm and the lower turning arm rotate counterclockwise and clockwise around the upper rotating shaft and the lower rotating shaft respectively. The front ends of the upper turning arm and the lower turning arm are connected to one end of the short chain and the long chain respectively through the connecting shaft, and the other ends of the short chain and the long chain are connected to the lower valve and the upper valve respectively. The short chain pulls the lower valve downward, and the long chain pushes the upper valve upward; when the trolley withdraws from the working position to the test position, the upper valve is reset under the action of gravity, and the lower valve is reset upward by the action of the torsion spring through the upper turning arm.

[0005] The dual-shaft quick-opening high-current valve mechanism is characterized in that: the locking mechanism includes a locking mechanism bracket, a locking plate, a locking shaft, a lock plate, an unlocking shaft, and a tension spring; the locking mechanism bracket is fixed on the base; the locking shaft is fixed on the locking mechanism bracket; the locking plate rotates around the locking shaft; the long waist hole on the locking plate shifts the unlocking shaft; the unlocking shaft is fixed on the lock plate; in the reset state, the locking plate is under the action of the tension spring, and the unlocking shaft drives the lock plate to clamp the rear ends of the upper and lower crank arms, preventing the upper and lower crank arms from rotating around the upper and lower rotation axes.

[0006] The dual-shaft quick-opening high-current valve mechanism is characterized in that: the locking plate is located below the driving bent plate. When the trolley moves from the test position to the working position, the driving bent plate installed on the trolley drives the locking plate to rotate, so that the lock plate moves away from the rear end of the upper and lower crank arms of the valve mechanism, and is automatically unlocked; when the trolley withdraws from the working position to the test position, the locking plate is acted upon by the tension spring, and the unlocking dial shaft drives the lock plate to clamp the rear end of the upper and lower crank arms, and is automatically locked.

[0007] The dual-shaft quick-opening high-current valve mechanism is characterized in that both the upper valve push rod and the lower valve push rod are provided with a first shaft sleeve.

[0008] The dual-shaft quick-opening high-current valve mechanism is characterized in that corresponding locking steps are provided at the rear ends of the upper and lower turning arms. When the upper and lower turning arms are in the reset state, the locking steps intersect to form a slot, and the lock plate is engaged in the slot.

[0009] The dual-shaft quick-opening high-current valve mechanism is characterized in that a padlock plate is formed at the front end of the base by integral bending, and corresponding padlock holes are provided between the padlock plate and the upper and lower crank arms.

[0010] The dual-rotating shaft quick-opening high-current valve mechanism is characterized in that the rear ends of the upper crank arm and the lower crank arm are both provided with second shaft sleeves that are sleeved with the upper rotating shaft and the lower rotating shaft.

[0011] The dual-shaft quick-opening high-current valve mechanism is characterized in that ribs are provided at both ends of the driving bent plate.

[0012] The advantages of the dual-shaft quick-opening high-current valve mechanism of the present invention are:

[0013] 1. The double-shaft structure design and the optimization of the positions of related parts make the structure novel and uncomplicated, the mechanism flexible and reliable, and the valve opening speed is much faster than the traditional valve mechanism (single-shaft structure). It can essentially solve the problem of collision between the high-current valve plate and the plum blossom contact of the trolley;

[0014] 2. By designing a special valve locking device for the double-axis valve mechanism, the valve's anti-error performance is enhanced.

[0015] The present invention will be further described below in conjunction with the accompanying drawings: BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the installation between the dual-shaft quick-opening high-current valve mechanism and the switch cabinet of the present invention;

[0017] Figure 2 A top view of the dual-shaft quick-opening high-current valve mechanism of the present invention;

[0018] Figure 3 A side view of the dual-shaft quick-opening high-current valve mechanism of the present invention;

[0019] Figure 4 is a side view of the locking mechanism of the present invention;

[0020] Figure 5 A top view of the locking mechanism of the present invention;

[0021] Figure 6 It is a structural schematic diagram of the upper crank arm and the lower crank arm of the present invention;

[0022] Figure 7 A top view of the base of the present invention;

[0023] Figure 8 A side view of the base of the present invention;

[0024] Figure 9 A top view of the driven bending plate;

[0025] Figure 10 A top view of the dual-shaft quick-opening high-current valve mechanism of the present invention in an open state;

[0026] Figure 11 This is a side view of the dual-shaft quick-opening high-current valve mechanism of the present invention in the open state. DETAILED DESCRIPTION

[0027] Reference Figure 1-11As shown, a dual-rotating-shaft, quick-opening, high-current valve mechanism of the present invention includes a valve mechanism 1 and a locking mechanism 16. The valve mechanism 1 primarily comprises a base 2, an upper crank arm 3, a lower crank arm 4, an upper valve push rod 5, a lower valve push rod 6, an upper rotating shaft 7, a lower rotating shaft 8, and a torsion spring 10. The upper rotating shaft 7 and the lower rotating shaft 8 are welded to the front end of the base 2 at intervals. The upper valve push rod 5 and the lower valve push rod 6 are welded to the rear ends of the upper crank arm 3 and the lower crank arm 4, respectively, and the rear ends of the upper crank arm 3 and the lower crank arm 4 can rotate about the upper rotating shaft 7 and the lower rotating shaft 8, respectively. The torsion spring 10 is used to reset the upper crank arm 3. When the trolley moves from the test position to the working position, a drive bent plate 9 mounted on the trolley simultaneously presses against the upper valve push rod 5 and the lower valve push rod 6, causing the upper crank arm 3 and the lower crank arm 4 to rotate counterclockwise and clockwise about the upper rotating shaft 7 and the lower rotating shaft 8, respectively. The front ends of the upper and lower crank arms 3 and 4 are connected to one end of a short chain 12 and a long chain 13, respectively, via a connecting shaft 11. The other ends of these short and long chains 12 and 13 are connected to a lower valve 14 and an upper valve 15, respectively. The short chain 12 pulls the lower valve 14 downward, while the long chain 13 pushes the upper valve 15 upward. When the trolley is withdrawn from the working position to the test position, the upper valve 15 returns to its original position due to gravity, while the lower valve 14, driven upward by the torsion spring 10 and driven by the upper crank arm 3, returns to its original position.

[0028] In the above structure, the distance between the upper valve push rod 5 and the upper rotating shaft 7 is sufficient to form a torque M that pushes the upper crank arm 3 to rotate. The distance between the lower valve push rod 6 and the lower rotating shaft 8 is sufficient to form a torque M that pushes the lower crank arm 4 to rotate. This torque M ranges from 25mm to 35mm, which is about half the torque of a traditional single-axis valve mechanism (traditionally 50mm to 70mm). Therefore, under the same forward speed of the trolley, the opening speed of the upper crank arm 3 and the lower crank arm 4 is nearly twice that of the traditional mechanism, thereby enabling the valve to be opened quickly. Due to the ability to quickly open the valve, even if the trolley is slightly deflected or the valve plate is slightly stuck during the swing-in process, the trolley's plum blossom contacts will not collide with the cabinet valve plate because the trolley valve has been quickly opened, achieving safe operation without damaging the cabinet components. Furthermore, the dual-shaft design significantly reduces the length of the upper and lower rotating shafts 7 and 8, as well as the sleeve 26 (now 21mm-32mm, compared to the traditional 40mm-45mm), thereby reducing friction and making the mechanism more labor-efficient to operate. Finally, the flat-plate design of the upper and lower crank arms 3 and 4 further reduces material and weight compared to the upper and lower crank arms of traditional high-current valve mechanisms, further simplifying operation.

[0029] Preferably, the locking mechanism 16 includes a locking mechanism bracket 29, a locking plate 17, a locking shaft 18, a locking plate 19, an unlocking shaft 20, and a tension spring 21. The locking mechanism bracket 29 is fixed to the base 2, the locking shaft 18 is fixed to the locking mechanism bracket 29, and the locking plate 17 rotates about the locking shaft 18. The elongated hole 28 in the locking plate 17 actuates the unlocking shaft 20, which is fixed to the locking plate 19. In the reset state (i.e., after the trolley is withdrawn from the working position to the test position), the locking plate 17, under the action of the tension spring 21, causes the unlocking shaft 20 to drive the locking plate 19 to engage the rear ends of the upper and lower crank arms 3 and 4, preventing the upper and lower crank arms 3 and 4 from rotating about the upper and lower rotation axes 7 and 8.

[0030] Preferably, the locking plate 17 is located below the driving curved plate 9. When the trolley moves from the test position to the working position, the driving curved plate 9 mounted on the trolley drives the locking plate 17 to rotate, causing the lock plate 19 to move away from the rear ends of the upper and lower crank arms 3 and 4 of the valve mechanism 1, thereby achieving automatic unlocking. When the trolley is withdrawn from the working position to the test position, the locking plate 17, under the action of the tension spring 21, drives the unlocking plate 20 to drive the lock plate 19 to engage the rear ends of the upper and lower crank arms 3 and 4, thereby achieving automatic locking.

[0031] Preferably, the upper valve push rod 5 and the lower valve push rod 6 are both provided with a first shaft sleeve 22 to reduce the friction between the driving bent plate 9 and the upper valve push rod 5 and the lower valve push rod 6, making the mechanism operation more labor-saving.

[0032] Preferably, the rear ends of the upper turning arm 3 and the lower turning arm 4 are provided with corresponding locking steps 23. When the upper turning arm 3 and the lower turning arm 4 are in the reset state, the locking steps 23 cross to form a slot 24, and the locking plate 19 is engaged in the slot 24 to facilitate the engagement of the locking plate 19.

[0033] Preferably, a padlock plate 28 is integrally formed at the front end of the base 2 by bending. Corresponding padlock holes 25 are provided between the padlock plate 28 and the upper and lower crank arms 3 and 4 to facilitate padlocking. Furthermore, the padlock plate 28 is integrally bent with the base 2, eliminating the padlock plate from the original valve mechanism. This reduces the number of valve mechanism parts, lowers production costs, and improves processing efficiency.

[0034] Preferably, the rear ends of the upper crank arm 3 and the lower crank arm 4 are each provided with a second sleeve 26 that is sleeved with the upper rotating shaft 7 and the lower rotating shaft 8. By the second sleeve 26 rotatingly engaging with the upper rotating shaft 7 and the lower rotating shaft 8, the second sleeve 26 serves to position the upper crank arm 3 and the lower crank arm 4, reduce friction, and improve wear resistance.

[0035] Preferably, the driving curved plate 9 is provided with ribs 27 at both ends, and the ribs 27 are integrally stamped and formed with the driving curved plate 9. The ribs 27 cooperate with the upper valve push rod 5 and the lower valve push rod 6 to reduce the width of the rear end of the driving curved plate 9, making the driving curved plate 9 more compact and lightweight.

[0036] The above description is merely an embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications should also be considered as within the scope of protection of the present invention.

Claims

1. A double-shaft quick-opening high-current valve mechanism, comprising a valve mechanism (1) and a locking mechanism (16), characterized in that: The valve mechanism (1) comprises a base (2), an upper crank arm (3), a lower crank arm (4), an upper valve push rod (5), a lower valve push rod (6), an upper rotating shaft (7), a lower rotating shaft (8) and a torsion spring (10), wherein the upper rotating shaft (7) and the lower rotating shaft (8) are fixed to the front end of the base (2) at intervals, and the upper valve push rod (5) and the lower valve push rod (6) are fixed to the rear ends of the upper crank arm (3) and the lower crank arm (4), respectively. The upper crank arm (3) and the lower crank arm (4) can rotate around the upper rotating shaft (7) and the lower rotating shaft (8), respectively. The torsion spring (10) is used to reset the upper crank arm (3); when the trolley moves from the test position to the working position, the driving bent plate (9) installed on the trolley synchronously supports the upper valve push rod (5) and the lower valve push rod ( 6), so that the upper turning arm (3) and the lower turning arm (4) rotate counterclockwise and clockwise around the upper rotating shaft (7) and the lower rotating shaft (8), respectively. The front ends of the upper turning arm (3) and the lower turning arm (4) are connected to one end of the short chain (12) and the long chain (13) respectively through the connecting shaft (11). The other ends of the short chain (12) and the long chain (13) are connected to the lower valve (14) and the upper valve (15) respectively. The short chain (12) pulls the lower valve (14) to move downward, and the long chain (13) pushes the upper valve (15) to move upward. When the trolley withdraws from the working position to the test position, the upper valve (15) is reset under the action of gravity, and the lower valve (14) is reset upward by the action of the torsion spring (10) through the upper turning arm (3).

2. The dual-shaft quick-opening high-current valve mechanism according to claim 1, characterized in that: The locking mechanism (16) includes a locking mechanism bracket (29), a locking plate (17), a locking shaft (18), a locking plate (19), an unlocking shaft (20) and a tension spring (21), wherein the locking mechanism bracket (29) is fixed on the base (2), the locking shaft (18) is fixed on the locking mechanism bracket (29), the locking plate (17) rotates around the locking shaft (18), the long waist hole (28) on the locking plate (17) drives the unlocking shaft (20), and the unlocking shaft (20) is fixed on the locking plate (19); in the reset state, the locking plate (17) is acted upon by the tension spring (21), and the unlocking shaft (20) drives the locking plate (19) to clamp the rear ends of the upper crank arm (3) and the lower crank arm (4), thereby preventing the upper crank arm (3) and the lower crank arm (4) from rotating around the upper rotation axis (7) and the lower rotation axis (8).

3. The dual-shaft quick-opening high-current valve mechanism according to claim 2, characterized in that: The locking plate (17) is located below the driving bent plate (9). When the trolley moves from the test position to the working position, the driving bent plate (9) installed on the trolley drives the locking plate (17) to rotate, so that the locking plate (19) moves away from the rear ends of the upper crank arm (3) and the lower crank arm (4) of the valve mechanism (1) to automatically unlock. When the trolley withdraws from the working position to the test position, the locking plate (17) is driven by the tension spring (21), and the unlocking plate shaft (20) drives the locking plate (19) to clamp the rear ends of the upper crank arm (3) and the lower crank arm (4) to automatically lock.

4. The dual-shaft quick-opening high-current valve mechanism according to claim 1, characterized in that: The upper valve push rod (5) and the lower valve push rod (6) are both provided with a first shaft sleeve (22).

5. The dual-shaft quick-opening high-current valve mechanism according to claim 2, characterized in that: The rear ends of the upper crank arm (3) and the lower crank arm (4) are provided with corresponding locking steps (23). When the upper crank arm (3) and the lower crank arm (4) are in a reset state, the locking steps (23) intersect to form a slot (24), and the locking plate (19) is engaged in the slot (24).

6. The dual-shaft quick-opening high-current valve mechanism according to claim 1, characterized in that: A padlock plate (28) is formed at the front end of the base (2) by integral bending, and corresponding padlock holes (25) are provided between the padlock plate (28) and the upper crank arm (3) and the lower crank arm (4).

7. The dual-shaft quick-opening high-current valve mechanism according to claim 1, characterized in that: The rear ends of the upper turning arm (3) and the lower turning arm (4) are both provided with a second shaft sleeve (26) sleeved with the upper rotating shaft (7) and the lower rotating shaft (8).

8. The dual-shaft quick-opening high-current valve mechanism according to claim 1, characterized in that: Both ends of the driving bent plate (9) are provided with retaining edges (27).

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