High-speed control valve of hydraulic operating mechanism
By designing a high-speed control valve for hydraulic operating mechanism, using precise component coordination and hydraulic control technology, the problem of long closing time of existing hydraulic operating mechanisms is solved, and the ability of the high-voltage circuit breaker is quickly cut off short circuit faults and the reliability of the circuit breaker is improved.
Patent Information
- Application Number
- CN202411642254.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-03-07
AI Technical Summary
The existing hydraulic actuator has a long time to open and close in high-voltage circuit breakers, which affects the reliability of the circuit breakers and cannot meet the demand for the high-voltage power grid system to remove short circuit faults at the fastest.
A high-speed control valve with hydraulic operating mechanism is designed to achieve rapid opening and closing operation through the precise coordination of threaded sleeves, springs, seal sleeves, valve cores, valve bodies and other components. The control valve divides the valve body into a plurality of relatively closed spaces, and uses oil holes to connect these spaces to achieve rapid hydraulic control.
The high-speed control of the hydraulic operating mechanism is realized, the opening and closing time of the high-voltage circuit breaker is shortened, the reliability of the circuit breaker is improved, and the short-circuit faults of the power grid can be quickly cut off, avoiding serious personal equipment accidents caused by the long short-circuit fault time.
Smart Images
Figure CN119572562A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of high-voltage power transmission and transformation, and in particular to a high-speed control valve of a hydraulic operating mechanism. Background Art
[0002] The hydraulic operating mechanism is an important equipment in the field of high-voltage power transmission and transformation, and an important component of high-voltage circuit breakers. The closing and opening operations of high-voltage circuit breakers are realized through the operating mechanism. The shorter the circuit breaker opening time, the more reliable the protection performance of the power grid.
[0003] The transmission structure and efficiency problems of the hydraulic operating mechanism currently used in high-voltage circuit breakers result in long opening and closing times of the circuit breakers, which affects the reliability of the high-voltage circuit breakers. With the development of the national power system, the continuous increase in system capacity, the continuous increase in transmission voltage, and the advancement of circuit breaker technology, the State Grid needs a hydraulic operating mechanism with short opening and closing times and stable mechanical characteristics to achieve the purpose of removing short-circuit faults in the power grid as quickly as possible and avoid serious personal and equipment accidents caused by long short-circuit faults.
[0004] Therefore, it is necessary to design a high-speed control valve of a hydraulic operating mechanism to solve the above problems.
[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention
[0006] The object of the present invention is to provide a high-speed control valve of a hydraulic operating mechanism to solve the above-mentioned problems.
[0007] The above technical objectives of the present invention are achieved through the following technical solutions: A high-speed control valve of a hydraulic operating mechanism, comprising: Threaded sleeve, spring A, sealing sleeve A, valve core A, valve body, valve sleeve, valve core B, spring B, sealing sleeve B, steel ball, spring C, valve needle and pressure plate; The sealing sleeve A, valve sleeve and sealing sleeve B are sequentially installed in series in the valve body, the sealing sleeve B is pressed and positioned in the valve body by a pressing plate, and the sealing sleeve A is pressed and positioned in the valve body by a threaded sleeve; The valve core A is installed in the sealing sleeve A, the valve core B is installed in the sealing sleeve B, the valve needle is installed in the inner hole of the valve core B and placed in the sealing sleeve B, the spring A is installed in the valve core A, the spring B is installed in the valve core B, two steel balls are placed in the hole on the right side of the valve needle, and the spring C is placed between the two steel balls.
[0008] The present invention is further configured as follows: the valve sleeve is provided with a valve port A and a valve port B, which cooperate with the valve core A and the valve core B for contact sealing.
[0009] The present invention is further configured as follows: sealing ring A, sealing ring B, sealing ring C, sealing ring D, sealing ring E and sealing ring F are arranged inside the valve body, and the valve port A and valve port B and the sealing ring A, sealing ring B, sealing ring C, sealing ring D, sealing ring E and sealing ring F arranged inside the valve body separate the inside of the valve body into four relatively closed spaces, namely, the oil supply chamber, the working chamber, the oil return chamber and the pilot working chamber.
[0010] The present invention is further configured as follows: the oil supply chamber is located between the sealing ring E and the sealing ring F, and an oil hole E is provided on the oil supply chamber.
[0011] The present invention is further configured as follows: the working chamber is located between the sealing ring D and the sealing ring E, and an oil hole D is provided on the working chamber.
[0012] By adopting the above technical solution, the working chamber is located between the sealing ring D and the sealing ring E outside the valve sleeve, and the space between the valve port A and the valve port B in the valve sleeve is connected by the oil hole D.
[0013] The present invention is further configured as follows: the oil return chamber is located between the sealing ring B, the sealing ring C and the sealing ring D.
[0014] By adopting the above technical solution, the oil return chamber is located on the right side of the sealing ring D on the valve sleeve and the valve port B, and is sealed by the space on the left side of the sealing ring B and the sealing ring C on the sealing sleeve B. The oil return chamber is connected to the oil tank of the hydraulic mechanism.
[0015] The present invention is further configured as follows: the pilot working chamber is located between the sealing ring A and the sealing ring B, and an oil hole A is provided on the pilot working chamber.
[0016] The present invention is further configured as follows: the valve core B is provided with an oil hole B and an oil hole C.
[0017] The beneficial effects of the present invention are: The present invention can solve the technical problem of shortening the opening time of the current ultra-high voltage circuit breaker and realizing one-cycle breaking, so as to achieve the purpose of removing the short-circuit fault of the power grid as quickly as possible and avoid serious personal and equipment accidents caused by the long short-circuit fault time. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments 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 creative work.
[0019] Figure 1It is a structural schematic diagram of a high-speed control valve of a hydraulic operating mechanism proposed by the present invention when it is in a closing position.
[0020] Figure 2 The present invention is a schematic structural diagram of a high-speed control valve of a hydraulic operating mechanism when the valve is in an open position.
[0021] Figure 3 It is a structural schematic diagram of a high-speed control valve of a hydraulic operating mechanism proposed by the present invention in the process of closing the valve.
[0022] In the figure, 1, threaded sleeve; 2, spring A; 3, sealing sleeve A; 4, valve core A; 5, valve body; 6, valve sleeve; 7, valve core B; 8, spring B; 9, sealing sleeve B; 10, steel ball; 11, spring C; 12, valve needle; 13, pressure plate; 14, sealing ring A; 15, sealing ring B; 16, sealing ring C; 17, sealing ring D; 18, sealing ring E; 19, sealing ring F; 20, oil supply chamber; 21, working chamber; 22, oil return chamber; 23, pilot working chamber; 24, oil hole A; 25, oil hole B; 26, oil hole C; 27, oil hole D; 28, oil hole E; 29, valve port A; 30, valve port B. DETAILED DESCRIPTION
[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0025] See also Figure 1 , Figure 2 and Figure 3 The present invention provides a high-speed control valve of a hydraulic operating mechanism, comprising: Threaded sleeve 1, spring A2, sealing sleeve A3, valve core A4, valve body 5, valve sleeve 6, valve core B7, spring B8, sealing sleeve B9, steel ball 10, spring C11, valve needle 12 and pressure plate 13; The sealing sleeve A3, the valve sleeve 6, and the sealing sleeve B9 are sequentially installed in series in the valve body 5. The sealing sleeve B9 is pressed and positioned in the valve body 5 by the pressing plate 13, and the sealing sleeve A3 is pressed and positioned in the valve body 5 by the threaded sleeve 1. The valve core A4 is installed in the sealing sleeve A3, the valve core B7 is installed in the sealing sleeve B9, the valve needle 12 is installed in the inner hole of the valve core B7 and placed in the sealing sleeve B9, the spring A2 is installed in the valve core A4, the spring B8 is installed in the valve core B7, the two steel balls 10 are placed in the hole on the right side of the valve needle 12, and the spring C11 is placed between the two steel balls 10. It should be noted that the two steel balls 10 are always in the inner hole of the valve core B7 or at the chamfer of the right end face with the cooperation of the spring C11, and will not fall out of the inner hole of the valve core B7.
[0026] Specifically, the valve sleeve 6 is provided with a valve port A29 and a valve port B30, which cooperate with the valve core A4 and the valve core B7 for contact sealing.
[0027] Through the above structure, the valve core A4 moves axially left and right in the sealing sleeve A3, and the valve port A29 at the inner hole of the valve sleeve 6 and the inner hole of the sealing sleeve A3 are limited. The spring A2 can provide the valve core A4 with a rightward reset force to seal the valve port A29; The valve core B7 moves axially left and right in the sealing sleeve B9, and is limited by the valve port B30 at the inner hole of the valve sleeve 6 and the step stop in the sealing sleeve B9; The valve needle 12 moves axially left and right in the valve core B7, and is limited by the inner hole of the sealing sleeve B9 and the right end face of the valve core A4. The spring B8 provides a rightward reset force for the valve needle 12, so that the valve needle 12 always fits with the sealing sleeve B9 after operation, and the spring B8 provides a leftward reset force for the valve core B7; The restoring force provided by spring A2 is greater than the restoring force of spring B8. Figure 2 The position is the initial position of this set of hydraulic valves, that is, the hydraulic mechanism opening position.
[0028] Specifically, sealing ring A14, sealing ring B15, sealing ring C16, sealing ring D17, sealing ring E18 and sealing ring F19 are arranged inside the valve body 5. The valve port A29 and valve port B30 and the sealing ring A14, sealing ring B15, sealing ring C16, sealing ring D17, sealing ring E18 and sealing ring F19 arranged inside the valve body 5 separate the inside of the valve body 5 into four relatively closed spaces, namely the oil supply chamber 20, the working chamber 21, the oil return chamber 22 and the pilot working chamber 23.
[0029] Specifically, the oil supply chamber 20 is located between the sealing ring E18 and the sealing ring F19, and an oil hole E28 is provided on the oil supply chamber 20. It should be noted that the oil supply chamber 20 is located between the outer sealing ring F19 of the sealing sleeve A3 and the sealing ring E18, and is a closed space at the left end of the valve port A29 in the sealing sleeve A3. The inner and outer spaces of the sealing sleeve A3 are connected by the oil hole E28 on the sleeve. The oil supply chamber 20 is connected to the oil pump of the hydraulic mechanism to provide high-pressure hydraulic oil.
[0030] Specifically, the working chamber 21 is located between the sealing ring D17 and the sealing ring E18, and an oil hole D27 is provided on the working chamber 21. It should be noted that the working chamber 21 is located between the sealing ring D17 and the sealing ring E18 outside the valve sleeve 6, and the space between the valve port A29 and the valve port B30 inside the valve sleeve 6 is connected by the oil hole D27.
[0031] Specifically, the oil return chamber 22 is located between the sealing ring B15, the sealing ring C16 and the sealing ring D17. It should be noted that the oil return chamber 22 is located on the right side of the sealing ring D17 and the valve port B30 on the valve sleeve 6, and is the space sealed by the sealing ring B15 and the sealing ring C16 on the left side of the sealing sleeve B9. The oil return chamber 22 is connected to the oil tank of the hydraulic mechanism.
[0032] The pilot working chamber 23 is located between the sealing ring A14 and the sealing ring B15. An oil hole A24 is provided on the pilot working chamber 23. Oil holes B25 and oil holes C26 are provided in the valve core B7. It should be noted that the pilot working chamber 23 is located in the space between the sealing ring A14 and the sealing ring B15 outside the sealing sleeve B9, and the space at the right end of the sealing ring C16 inside the sealing sleeve B9. The two spaces are connected by the oil hole A24.
[0033] It should be noted that the working chamber 21 and the pilot working chamber 23 are connected by the oil hole B25 and the oil hole C26 in the valve core B7, and then through the gap between the valve needle 12 and the inner hole of the valve core B7, and the gap between the valve core B7 and the inner hole of the sealing sleeve B9. The pilot working chamber 23 is connected with the pilot valve of the mechanism, and the pilot valve controls the pilot working chamber 23 to be connected with the oil supply chamber 20 or the pilot working chamber 23 to be connected with the oil return chamber 22; The valve core A4 moves axially left and right in the sealing sleeve A3, and the valve port A29 at the inner hole of the valve sleeve 6 and the inner hole of the sealing sleeve A3 are used to limit the position. The spring A2 can provide the valve core A4 with a rightward reset force to seal the valve port A29; The valve core B7 moves axially left and right in the sealing sleeve B9, and is limited by the valve port B30 at the inner hole of the valve sleeve 6 and the stepped hole in the sealing sleeve B9; The valve needle 12 moves axially left and right in the valve core B7, and is limited by the inner hole of the sealing sleeve B9 and the right end face of the valve core A4. The spring B8 provides a rightward reset force for the valve needle 12, so that the valve needle 12 is always in contact with the sealing sleeve B9 after operation, and the spring B8 provides a leftward reset force for the valve core B7.
[0034] Working principle: Closing process: Figure 2 Position, the working chamber 21 is connected with the oil return chamber 22 through the valve port B30, the pilot valve controls the hydraulic valve of the present invention, so that the oil supply chamber 20 is connected with the pilot working chamber 23, the valve needle 12 and the right side of the valve core B7 are impacted by the high-pressure oil, so that the valve core B7 and the valve needle 12 move to the left, pushing the valve core A4 to move to the left, the valve port A29 is released from the seal but not fully opened, as the valve core B7 moves, the valve core B7 and the valve port B30 on the valve sleeve 6 are closed and contacted and sealed, the working chamber 21 is separated from the oil return chamber 22, and the valve core A4 and the valve needle 12 continue to move to the left. Figure 3 Position, valve port A29 is completely opened, the oil supply chamber 20 and the working chamber 21 are connected through valve port A29, and the control valve completes the reversal. As the oil supply chamber 20, the working chamber 21 and the pilot working chamber 23 are connected, the oil pressure on the left and right sides of the valve needle 12 is equal, and the valve needle 12 moves to the right under the action of spring B8. Figure 3 Position, completing the closing and reversing operation of the hydraulic valve; Opening process: Figure 1 Position, the working chamber 21 is connected with the oil supply chamber 20 through the valve port A29, the pilot valve controls the hydraulic valve of the present invention, so that the return oil chamber 22 is connected with the pilot working chamber 23, the valve needle 12 and the right side of the valve core B7 lose oil pressure, so that the valve core B7 moves to the right, the valve core B7 is separated from the valve port B30 on the valve sleeve 6 and the seal is released, as the valve core B7 moves, the working chamber 21 is connected with the return oil chamber 22 through the valve port B30, the valve core A4 moves to the right under the action of pressure and spring A2, the valve port A29 contacts the limit seal, and the valve core B7 moves to the right to Figure 2 Position, the oil supply chamber 20 and the working chamber 21 are separated by the valve port A29, and the working chamber 21 is connected with the oil return chamber 22 through the valve port B30, completing the opening and reversing operation of the hydraulic valve.
[0035] The above is a detailed introduction to a high-speed control valve of a hydraulic operating mechanism provided by the present invention. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims
1. A high-speed control valve of a hydraulic operating mechanism, characterized in that: include: Threaded sleeve (1), spring A (2), sealing sleeve A (3), valve core A (4), valve body (5), valve sleeve (6), valve core B (7), spring B (8), sealing sleeve B (9), steel ball (10), spring C (11), valve needle (12) and pressure plate (13); The sealing sleeve A (3), the valve sleeve (6), and the sealing sleeve B (9) are sequentially connected in series and installed inside the valve body (5); the sealing sleeve B (9) is press-fitted and positioned inside the valve body (5) through a pressing plate (13); and the sealing sleeve A (3) is press-fitted and positioned inside the valve body (5) through a threaded sleeve (1); The valve core A (4) is installed in the sealing sleeve A (3), the valve core B (7) is installed in the sealing sleeve B (9), the valve needle (12) is installed in the inner hole of the valve core B (7) and placed in the sealing sleeve B (9), the spring A (2) is installed in the valve core A (4), the spring B (8) is installed in the valve core B (7), two steel balls (10) are placed in the hole on the right side of the valve needle (12), and the spring C (11) is placed between the two steel balls (10).
2. A high-speed control valve of a hydraulic operating mechanism according to claim 1, characterized in that: The valve sleeve (6) is provided with a valve port A (29) and a valve port B (30) which cooperate with the valve core A (4) and the valve core B (7) to form a contact seal.
3. A high-speed control valve of a hydraulic operating mechanism according to claim 2, characterized in that: The valve body (5) is provided with a sealing ring A (14), a sealing ring B (15), a sealing ring C (16), a sealing ring D (17), a sealing ring E (18) and a sealing ring F (19). The valve port A (29) and the valve port B (30) together with the sealing ring A (14), the sealing ring B (15), the sealing ring C (16), the sealing ring D (17), the sealing ring E (18) and the sealing ring F (19) provided inside the valve body (5) separate the inside of the valve body (5) into four relatively closed spaces, namely, an oil supply chamber (20), a working chamber (21), an oil return chamber (22) and a pilot working chamber (23).
4. A high-speed control valve of a hydraulic operating mechanism according to claim 3, characterized in that: The oil supply chamber (20) is located between the sealing ring E (18) and the sealing ring F (19), and an oil hole E (28) is provided on the oil supply chamber (20).
5. A high-speed control valve of a hydraulic operating mechanism according to claim 3, characterized in that: The working chamber (21) is located between the sealing ring D (17) and the sealing ring E (18), and an oil hole D (27) is provided on the working chamber (21).
6. A high-speed control valve of a hydraulic operating mechanism according to claim 3, characterized in that: The oil return chamber (22) is located between the sealing ring B (15), the sealing ring C (16) and the sealing ring D (17).
7. A high-speed control valve of a hydraulic operating mechanism according to claim 3, characterized in that: The pilot working chamber (23) is located between the sealing ring A (14) and the sealing ring B (15), and an oil hole A (24) is provided on the pilot working chamber (23).
8. A high-speed control valve of a hydraulic operating mechanism according to claim 1, characterized in that: The valve core B (7) is provided with an oil hole B (25) and an oil hole C (26).