Self-locking device and method for high-pressure ball valves of hydraulic systems

Abstract

A kind of self-locking device and method for high-pressure ball valve of hydraulic system, it includes base, operating rod, adjusting ring and locking mechanism, high-pressure ball valve is clamped by the upper base block and lower base block of base, the core column connected with valve core passes through column hole, operating rod passes through the insertion hole on column hole, adjusting ring and locking mechanism are arranged on operating rod, two adjusting rings are located on the two sides of core column, operating rod is locked by two adjusting rings after adjusting length, the swing of operating rod is limited by two limiting blocks on base, so that valve core is in full open or full close state, locking mechanism is locked with locking hole, avoid the position change of valve core of high-pressure ball valve under the action of high-speed flowing medium, so that valve core is kept in required position, simple and convenient operation, original high-pressure ball valve is not damaged when installing, good safety.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic opening and closing technology for hydropower stations, and relates to a self-locking device and method for high-pressure ball valves in hydraulic systems. Background Technology

[0002] High-head power stations are equipped with emergency quick-closing gates at the intake of their water intake systems. In the event of a runaway generator, these gates can quickly cut off the water flow to handle or prevent downstream accidents, thus ensuring the safe operation of the power plant and equipment. To ensure rapid closure of the emergency quick-closing gates, a large-diameter hydraulic hoist structure is typically used for fast closure control. The hydraulic hoist control system usually includes ball valves to control the flow direction of the medium in the system loop. These ball valves can be opened to the required operating position according to the equipment's operational needs to ensure normal system operation. In high-speed, high-flow-rate large-diameter hydraulic systems, the fluid can cause significant vibrations in the ball valves, leading to changes in the valve core's position. This can cause the system to malfunction, losing its design functionality and resulting in a failure. Therefore, ensuring the valve core remains in the correct position is a crucial problem that needs to be solved.

[0003] Currently, for large-diameter, high-flow-rate high-pressure ball valves, the valve core is typically operated by a control handle. The control handle is then removed once the valve core is in position to minimize its impact on the valve core's position and allow it to maintain itself in the required operating position. However, in actual operation, the valve core may change position under the influence of high-speed flowing media, making it impossible for the valve core to maintain itself in the required position, thus posing a safety hazard to the system. Summary of the Invention

[0004] The technical problem to be solved by this invention is to provide a self-locking device and method for a high-pressure ball valve in a hydraulic system. The high-pressure ball valve is held between an upper and lower base block of a base. The valve core is connected to a core rod that passes through a core hole. An operating rod passes through an insertion hole in the core hole. The operating rod is equipped with an adjusting ring and a locking mechanism. Two adjusting rings are located on both sides of the core rod. After the operating rod is adjusted in length, it is locked by the two adjusting rings. A torsional force is applied to the operating rod, and two limiting blocks on the base limit the swing amplitude of the operating rod, keeping the valve core in a fully open or fully closed state. The locking mechanism cooperates with the locking hole to lock the valve core, preventing positional changes in the high-pressure ball valve core under the action of a high-speed flowing medium, thus keeping the valve core in the required position. The operation is simple and convenient, and the original high-pressure ball valve is not damaged during installation, ensuring good safety.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a self-locking device for a high-pressure ball valve in a hydraulic system, comprising a base, an operating rod, an adjusting ring, and a locking mechanism; the operating rod is located between two limiting blocks arranged diagonally on the base, the adjusting ring is slidably engaged with the operating rod, the locking mechanism is connected to the operating rod, and the locking pin passes radially through the operating rod and engages with the locking hole on the base; the two limiting blocks limit the swing amplitude of the operating rod, and the operating rod controls the valve core of the high-pressure ball valve to be in the fully open or fully closed position.

[0006] The base consists of an upper base block and a lower base block connected together as a whole, with clamping holes passing through the upper base block and the lower base block.

[0007] Two corresponding limiting blocks are provided on one of the diagonals of the upper base block, the locking hole is close to the side of the limiting block, and the column hole is located at the center of the upper base block.

[0008] The operating lever has multiple limit pins spaced apart on its body, and a fixed striking block is provided at the handle near one end of the lever.

[0009] The limiting pin includes a spring and a limiting post disposed inside the pin tube. The limiting post is located at both ends of the pin tube and is restricted from disengaging by the pin tube. The spring is located between the two limiting posts and abuts against them. The pin tube passes radially through the operating rod and is connected to it. The limiting post extends out of the rod body of the operating rod.

[0010] The adjusting ring is a circular ring with two symmetrically connected receiving tubes on its outer wall. The compression spring and the button are located inside the receiving tubes to prevent them from coming out. The circular ring is sleeved on the rod body of the operating lever.

[0011] The locking mechanism includes a tube and a spring sleeved on the locking pin, and a retaining ring fixed on the locking pin. The spring and the retaining ring are located inside the tube to prevent them from coming out. When the spring is in the extended state, both ends of the locking pin extend out of the tube. One end of the locking pin is connected to a ball head handle.

[0012] The valve core of the high-pressure ball valve is provided with an insertion hole on the core column.

[0013] The installation method of the self-locking device for a high-pressure ball valve in a hydraulic system, as described above, includes the following steps: SA1, base installation, the upper and lower base blocks of the base are fastened to the valve body of the high-pressure ball valve, and the core column passes through the column hole on the upper base block; SA2, locking, uses bolts to connect the base into a whole and lock it in place by passing through the upper base block and the lower base block; SA3, Operating lever installation: The end of the operating lever away from the handle passes through the insertion hole on the core post; in this step, two adjusting rings are fitted onto the operating lever and are located on both sides of the core post respectively; SA4, Adjusting ring installation: The adjusting ring is fitted onto the operating lever and locked in place with one of the limit pins on the operating lever.

[0014] The locking method for the self-locking device of the high-pressure ball valve in a hydraulic system, as described above, includes the following steps: SB1, the valve core is fully open or fully closed. The torque applied to the operating lever drives the core of the high-pressure ball valve to rotate, so that the valve core is in the fully open or fully closed state; in this step, the locking mechanism is in the unlocked state. SB2, valve core locking: Pull the ball head handle of the locking pin upward and slightly swing the operating lever. When the locking pin aligns with the locking hole on the base, release the ball head handle to allow the locking pin to insert into the locking hole and lock the operating lever, thus restricting the rotation of the valve core. During this step, the spring is compressed as the ball head handle is lifted. After releasing the ball head handle, the spring extends and pushes the locking pin downward. SB3, Operating lever adjustment and locking: In SB1, when the required torsional force of the operating lever is too large, pushing and pulling the operating lever increases the distance between the handle and the core column. During this process, the adjusting ring is pushed along the axial direction of the operating lever and the button is pressed to push the limit pin, so that the adjusting ring passes the limit pin. After passing the limit pin, the button is released, so that the two adjusting rings are clamped on both sides of the core column and locked in the axial direction of the operating lever.

[0015] The main beneficial effects of this invention are as follows: The upper and lower base blocks of the base clamp the high-pressure ball valve, and the original high-pressure ball valve will not be damaged after installation.

[0016] The valve core is connected to a core rod that passes through a core hole, and the operating rod passes through an insertion hole on the core hole. The operating rod drives the core rod to rotate, thereby fully opening or closing the valve core. The operation is simple and labor-saving.

[0017] The control lever is equipped with two adjusting rings. After the length of the control lever is adjusted, it is locked by the two adjusting rings, which makes the length of the force-bearing end of the control lever adjustable and provides good operational stability after locking.

[0018] The control lever is equipped with a locking mechanism. When the torsional force of the control lever is applied, two limit blocks on the base restrict the swing of the control lever, locking the valve core in the fully open or fully closed position, so that the position will not change even under the action of high-speed flowing medium.

[0019] Two corresponding limit blocks are set on one of the diagonals of the upper base block to limit the swing amplitude of the operating lever and effectively prevent the valve core from being damaged due to excessive swing amplitude. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a diagram showing the fully closed position of the valve core in this invention.

[0021] Figure 2 This is a diagram showing the fully open position of the valve core in this invention.

[0022] Figure 3 This is an exploded view of the present invention.

[0023] Figure 4 This is a schematic diagram of the structure of the base of the present invention.

[0024] Figure 5 This is a schematic diagram of the structure of the operating lever of the present invention.

[0025] Figure 6 This is a schematic diagram of the limiting pin of the present invention.

[0026] Figure 7 This is a schematic diagram of the structure of the adjusting ring of the present invention.

[0027] Figure 8 for Figure 7 Exploded view.

[0028] Figure 9 This is a schematic diagram of the locking mechanism of the present invention.

[0029] In the diagram: Base 1, Upper base block 11, Lower base block 12, Clamping hole 13, Limiting block 14, Locking hole 15, Column hole 16, Operating rod 2, Limiting pin 21, Striking block 22, Adjusting ring 3, Receiving tube 31, Compression spring 32, Button 33, Locking mechanism 4, Locking pin 41, Column 42, Extension spring 43, Retaining ring 44, Ball head handle 45, Valve core 51, Core column 52. Detailed Implementation

[0030] like Figures 1-9 A self-locking device for a high-pressure ball valve in a hydraulic system includes a base 1, an operating rod 2, an adjusting ring 3, and a locking mechanism 4. The operating rod 2 is located between two limiting blocks 14 arranged diagonally on the base 1. The adjusting ring 3 is slidably engaged with the operating rod 2. The locking mechanism 4 is connected to the operating rod 2, and a locking pin 41 passes radially through the operating rod 2 and engages with a locking hole 15 on the base 1. The two limiting blocks 14 restrict the swing amplitude of the operating rod 2, and the operating rod 2 controls the valve core 51 of the high-pressure ball valve to be in a fully open or fully closed position. In use, after adjusting the length, the operating rod 2 is locked by the two adjusting rings 3. Applying a torsional force to the operating rod 2, the two limiting blocks 14 on the base 1 restrict the swing amplitude of the operating rod 2, so that the valve core 51 is in a fully open or fully closed state. The locking mechanism 4 engages with the locking hole 15 to lock, preventing the valve core 51 of the high-pressure ball valve from changing position under the action of high-speed flowing medium, so that the valve core 51 is self-held in the required position. The operation is simple and convenient, and the original high-pressure ball valve is not damaged during installation, ensuring good safety.

[0031] In a preferred embodiment, the base 1 is formed by connecting an upper base block 11 and a lower base block 12 into a single unit, with a clamping hole 13 passing through the upper base block 11 and the lower base block 12. During installation, the upper base block 11 and the lower base block 12 clamp the high-pressure ball valve within the clamping hole 13, ensuring that the original high-pressure ball valve is not damaged after installation.

[0032] In a preferred embodiment, two corresponding limiting blocks 14 are provided on one diagonal of the upper base block 11, a locking hole 15 is located near the limiting block 14, and a column hole 16 is located at the center of the upper base block 11. In use, the two limiting blocks 14 limit the swing amplitude of the operating lever 2, effectively preventing damage to the valve core 51 due to excessive swing amplitude; the locking hole 15 is used to cooperate with the locking mechanism 4 to lock the operating lever 2, and the column hole 16 is used for the core 52 of the high-pressure ball valve to pass through.

[0033] In a preferred embodiment, multiple limiting pins 21 are spaced apart on the rod body of the operating lever 2, and a fixed striking block 22 is provided at the handle near one end of the lever body. In use, the limiting pins 21 are used to limit the distance between the two adjusting rings 3; when the high-pressure ball valve experiences back pressure under high pressure, the striking block 22 is struck laterally to release the pressure by external force, ensuring that the ball valve can be safely opened.

[0034] In a preferred embodiment, the limiting pin 21 includes a spring and a limiting post disposed within the pin tube. The limiting post is located at both ends of the pin tube and is restricted from disengaging by the pin tube. The spring is located between the two limiting posts and abuts against them. The pin tube passes radially through the operating rod 2 and connects to it. The limiting post extends out of the operating rod 2. In use, when the limiting post is pushed, it retracts into the pin tube, facilitating the sliding of the adjusting ring 3. After the adjusting ring 3 passes the limiting pin 21, the limiting post pops out of the pin tube again to block the adjusting ring 3, preventing the adjusting ring 3 from sliding off the operating rod 2 without external force.

[0035] Preferably, the outer end of the limiting pin 21 is spherical or sloping, so that the adjusting ring 3 can be pushed over when sliding.

[0036] In a preferred embodiment, the adjusting ring 3 is a circular ring with two symmetrically connected receiving tubes 31 on its outer wall. A compression spring 32 and a button 33 are located within the receiving tubes 31 to prevent disengagement. The circular ring is fitted onto the rod body of the operating lever 2. In use, pushing the adjusting ring 3 along the axial direction of the operating lever 2 causes the adjusting ring 3 to push back the limiting pin 21. When the limiting pin retracts and enters the adjusting ring 3, pressing the button 33 pushes the limiting pin, and simultaneously pushing the adjusting ring 3 allows it to pass over the limiting pin 21 on the operating lever 2.

[0037] In a preferred embodiment, the locking mechanism 4 includes a tube 42 and a spring 43 sleeved on the locking pin 41, and a retaining ring 44 fixed on the locking pin 41. The spring 43 and the retaining ring 44 are located inside the tube 42 to prevent it from coming out. When the spring 43 is in the extended state, both ends of the locking pin 41 extend out of the tube 42. One end of the locking pin 41 is connected to a ball head handle 45. In use, the ball head handle 45 of the locking pin 41 is pulled upward and the operating lever 2 is slightly swung. When the locking pin 41 corresponds to the locking hole 15 on the base 1, the ball head handle 45 is released to allow the locking pin 41 to insert into the locking hole 15 to lock the operating lever 2, thus restricting the rotation of the valve core 51.

[0038] Preferably, when the ball head handle 45 is pulled upward, the spring 43 is compressed, and after the ball head handle 45 is released, the spring 43 extends and pushes the locking pin 41 downward to reset.

[0039] In a preferred embodiment, the valve core 51 of the high-pressure ball valve is connected to a core post 52 with an insertion hole. In use, the insertion hole on the core post 52 is used to connect the operating rod 2, serving as a force-bearing fulcrum for the operating rod 2 during operation.

[0040] In a preferred embodiment, the installation method of the self-locking device for a high-pressure ball valve in a hydraulic system, as described above, includes the following steps: SA1, base installation, the upper base block 11 and the lower base block 12 of the base 1 are fastened to the valve body of the high pressure ball valve, and the core column 52 passes through the column hole 16 on the upper base block 11. SA2, locking, using bolts to connect the base 1 into a whole and lock it in place by passing through the upper base block 11 and the lower base block 12; SA3, Operating lever installation: The end of the operating lever 2 away from the handle passes through the insertion hole on the core post 52; In this step, two adjusting rings 3 are sleeved on the operating lever 2 and are located on both sides of the core post 52 respectively; SA4, Adjusting ring installation: The adjusting ring 3 is fitted onto the operating lever 2 and locked in place with one of the limit pins 21 on the operating lever 2.

[0041] The above installation method is simple and convenient to operate, and does not damage the original high-pressure ball valve during installation. It can be installed even in a confined space.

[0042] In a preferred embodiment, the locking method for the self-locking device of a high-pressure ball valve in a hydraulic system, as described above, includes the following steps: SB1, the valve core is fully open or fully closed. The torque of the operating lever 2 is applied to drive the core column 52 of the high-pressure ball valve to rotate the valve core 51, so that the valve core 51 is in the fully open or fully closed state; in this step, the locking mechanism 4 is in the unlocked state. SB2, valve core locking, pull the ball head handle 45 of locking pin 41 upward and slightly swing the operating lever 2. When the locking pin 41 corresponds to the locking hole 15 on the base 1, release the ball head handle 45 so that the locking pin 41 inserts into the locking hole 15 to lock the operating lever 2 and restrict the rotation of valve core 51. In this step, during the upward lifting of ball head handle 45, spring 43 is compressed. After releasing ball head handle 45, spring 43 extends and pushes locking pin 41 downward. SB3, Operating lever adjustment and locking: In SB1, when the required torsional force of the operating lever 2 is too large, pushing and pulling the operating lever 2 increases the distance between the handle and the core column 52. During this process, the adjusting ring 3 is pushed along the axial direction of the operating lever 2 and the button 33 is pressed to push the limit pin 21, so that the adjusting ring 3 passes the limit pin 21. After passing the limit pin 21, the button 33 is released, so that the two adjusting rings 3 are clamped on both sides of the core column 52 and locked in the axial direction of the operating lever 2.

[0043] The above-described locking method uses the locking lever 2 to lock the valve core 51 in the fully open or fully closed position, preventing the valve core 51 of the high-pressure ball valve from changing position under the action of high-speed flowing medium, thus keeping the valve core 51 in the required position. At the same time, the distance between the handle of the operating lever 2 and the core column 52 is adjustable, and its axial movement is locked by two adjusting rings 3, making operation easier and improving safety during operation.

[0044] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The embodiments and features described in these embodiments can be arbitrarily combined without conflict. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A self-locking device for a high-pressure ball valve in a hydraulic system, characterized in that: It includes a base (1), an operating rod (2), an adjusting ring (3), and a locking mechanism (4); the operating rod (2) is located between two limiting blocks (14) arranged diagonally on the base (1), the adjusting ring (3) is slidably engaged with the operating rod (2), the locking mechanism (4) is connected to the operating rod (2), and the locking pin (41) passes radially through the operating rod (2) and engages with the locking hole (15) on the base (1); the two limiting blocks (14) limit the swing of the operating rod (2), and the operating rod (2) controls the valve core (51) of the high-pressure ball valve to be in the fully open or fully closed position; Multiple limiting pins (21) are spaced apart on the rod body of the operating lever (2); The limiting pin (21) includes a spring and a limiting post installed inside the pin tube. The limiting post is located at both ends of the pin tube and is restricted from being released by the pin tube. The spring is located between the two limiting posts and abuts against them. The pin tube passes radially through the operating rod (2) and is connected to it. The limiting post extends out of the rod body of the operating rod (2). The base (1) is formed by connecting an upper base block (11) and a lower base block (12) into a whole, and the clamping hole (13) passes through the upper base block (11) and the lower base block (12). Two corresponding limiting blocks (14) are provided on one of the diagonals of the upper base block (11), the locking hole (15) is close to the limiting block (14), and the column hole (16) is located at the center of the upper base block (11). Its locking method includes the following steps: SB1, the valve core is fully open or fully closed. The torque of the operating lever (2) drives the core column (52) of the high-pressure ball valve to rotate the valve core (51), so that the valve core (51) is in the fully open or fully closed state; in this step, the locking mechanism (4) is in the unlocked state. SB2, valve core locked, pull up the ball head handle (45) of the locking pin (41) and slightly swing the operating rod (2). When the locking pin (41) corresponds to the locking hole (15) on the base (1), release the ball head handle (45) so that the locking pin (41) is inserted into the locking hole (15) to lock the operating rod (2) and restrict the rotation of the valve core (51). In this step, during the process of lifting the ball head handle (45), the spring (43) is compressed. After releasing the ball head handle (45), the spring (43) extends and pushes the locking pin (41) downward. SB3, Operating lever adjustment and locking. In SB1, when the required torsional force of the operating lever (2) is too large, push and pull the operating lever (2) to increase the distance between the handle and the core column (52). During this process, push the adjusting ring (3) along the axial direction of the operating lever (2) and press the button (33) to push the limit pin (21), so that the adjusting ring (3) passes the limit pin (21). After passing the limit pin (21), release the button (33) so that the two adjusting rings (3) are clamped on both sides of the core column (52) and locked in the axial direction of the operating lever (2).

2. The self-locking device for a high-pressure ball valve in a hydraulic system according to claim 1, characterized in that: The operating lever (2) has a fixed striking block (22) at the handle near one end of the lever body.

3. The self-locking device for a high-pressure ball valve in a hydraulic system according to claim 1, characterized in that: The adjusting ring (3) is a circular ring with two receiving tubes (31) symmetrically connected to its outer wall. The compression spring (32) and the button (33) are located inside the receiving tubes (31) to prevent them from coming out. The circular ring is sleeved on the rod of the operating lever (2).

4. The self-locking device for a high-pressure ball valve in a hydraulic system according to claim 1, characterized in that: The locking mechanism (4) includes a tube (42) and a spring (43) sleeved on the locking pin (41), and a retaining ring (44) fixed on the locking pin (41). The spring (43) and the retaining ring (44) are located inside the tube (42) to restrict the release. When the spring (43) is in the extended state, both ends of the locking pin (41) extend out of the tube (42). One end of the locking pin (41) is connected to the ball head handle (45).

5. The self-locking device for a high-pressure ball valve in a hydraulic system according to claim 1, characterized in that: The valve core (51) of the high-pressure ball valve is connected to a core post (52) with an insertion hole.

6. The method for installing the self-locking device for a high-pressure ball valve in a hydraulic system according to any one of claims 1 to 5, characterized in that, It includes the following steps: SA1, base installation, the upper base block (11) and lower base block (12) of the base (1) are fastened to the valve body of the high pressure ball valve, and the core column (52) passes through the column hole (16) on the upper base block (11). SA2, locking, using bolts to connect the base (1) into a whole and lock it by passing through the upper base block (11) and the lower base block (12); SA3, Operating lever installation, the end of the operating lever (2) away from the handle passes through the insertion hole on the core column (52); in this step, two adjusting rings (3) are sleeved on the operating lever (2) and located on both sides of the core column (52); SA4, Adjustment ring installation: The adjustment ring (3) is fitted onto the operating lever (2) and locked in cooperation with one of the limit pins (21) on the operating lever (2).

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