阅读说明：本技术 能黑启动解锁关闭的液压启闭机 (Hydraulic hoist capable of being unlocked and closed in black start ) 是由 石守津 胡梦溪 沈燕萍 郝楠楠 滕楷 金晓华 于 2020-12-30 设计创作，主要内容包括：本发明涉及一种能黑启动解锁关闭的液压启闭机。本发明的目的是提供一种结构简单、安全可靠的能在无电情况下,黑启动解锁关闭的液压启闭机。本发明的技术方案是：一种能黑启动解锁关闭的液压启闭机,其特征在于：锁定机构由锁定油缸控制动作,该锁定油缸的左(A)端侧腔室分别经球阀Ⅰ或电磁阀Ⅰ连通所述液压缸下腔的压力油回路,右(B)端侧腔室油液经换向阀回油箱,实现脱锁操作；液压缸的有杆腔经单向节流阀和二通插装阀节流后连通电液压控制系统的压力油回路,通过电磁阀Ⅱ或球阀Ⅱ控制二通插装阀的功能,该液压缸的无杆腔经充液阀连接补油箱和主油箱。本发明适用于水利水电工程及类似领域。(The invention relates to a hydraulic hoist capable of being unlocked and closed in a black start mode. The invention aims to provide a hydraulic hoist which is simple in structure, safe and reliable and can be unlocked and closed in a black-start mode under the condition of no electricity. The technical scheme of the invention is as follows: the utility model provides a hydraulic hoist that ability black start unblock was closed which characterized in that: the locking mechanism is controlled by a locking oil cylinder to act, a left (A) end side cavity of the locking oil cylinder is respectively communicated with a pressure oil loop of the lower cavity of the hydraulic cylinder through a ball valve I or an electromagnetic valve I, and oil in a right (B) end side cavity returns to an oil tank through a reversing valve, so that unlocking operation is realized; a rod cavity of the hydraulic cylinder is communicated with a pressure oil loop of the electro-hydraulic control system after being throttled by the one-way throttle valve and the two-way cartridge valve, the function of the two-way cartridge valve is controlled by the solenoid valve II or the ball valve II, and a rodless cavity of the hydraulic cylinder is connected with the oil replenishing tank and the main oil tank through the liquid charging valve. The invention is suitable for the fields of water conservancy and hydropower engineering and the like.)

1. The utility model provides a hydraulic hoist that can black start unblock was closed has the hydraulic control system who connects the pneumatic cylinder of gate and control pneumatic cylinder action, install the locking mechanical system that can lock the interior piston rod of pneumatic cylinder on the pneumatic cylinder, its characterized in that: the locking mechanism is controlled by a locking oil cylinder to act, a chamber at the side A of the locking oil cylinder is respectively communicated with a pressure oil loop of a lower cavity of the hydraulic cylinder through a ball valve I and an electromagnetic valve I, and oil in the chamber at the side B of the locking oil cylinder returns to the oil tank through a reversing valve;

a rod cavity of the hydraulic cylinder is communicated with a pressure oil loop of the electro-hydraulic control system after being throttled by the one-way throttle valve and the two-way cartridge valve, the function of the two-way cartridge valve is controlled by the solenoid valve II or the ball valve II, and a rodless cavity of the hydraulic cylinder is connected with the oil replenishing tank and the main oil tank through the liquid charging valve.

2. The hydraulic hoist capable of black start unlocking and closing according to claim 1, characterized in that: the locking mechanism is provided with a locking body and a locking rod, wherein the locking rod is positioned in a rodless cavity of the hydraulic cylinder and coaxially connected to the piston rod, and a locking seat is arranged at the end, far away from the piston rod, of the locking rod;

the locking body is arranged at the end part of a rodless cavity of the hydraulic cylinder, the length direction of the locking body is vertical to the axial direction of the locking rod, a small round hole through which the locking rod can penetrate through the limiting locking seat through hole and a large round hole through which the locking seat can penetrate are formed in the locking body along the length direction of the locking body, and the small round hole and the large round hole are combined to form a pear-shaped hole so as to realize locking and unlocking;

the small round hole end in the length direction of the locking body is directly connected with the piston rod at the B end of the locking oil cylinder through the clamping groove, the large round hole end in the length direction of the locking body is connected with the compensation rod, and the compensation rod is inserted into a compensation sleeve connected to the hydraulic cylinder.

3. The hydraulic hoist capable of black start unlocking and closing according to claim 2, characterized in that: the stroke monitoring device is used for acquiring a piston rod of the locking hydraulic cylinder, a stroke switch for monitoring the position of the locking block is arranged on the outer side of the compensation rod, and the stroke monitoring device and the stroke switch are connected with a control unit of a hydraulic control system to control the actions of the locking oil cylinder and the hydraulic hoist.

4. The hydraulic hoist capable of black start unlocking and closing according to claim 1, characterized in that: the locking cylinder is provided with a bidirectional piston rod.

5. The hydraulic hoist capable of black start unlocking and closing according to claim 1, characterized in that: the system pressure oil is obtained from the lower cavity of the hydraulic cylinder, and an additional power source is not needed.

6. The hydraulic hoist capable of black start unlocking closure according to claim 1, 2 or 3, characterized in that:

when the stroke detection device detects that the piston of the hydraulic cylinder and the locking rod slide downwards for a certain distance, the oil pump is started to return to the full-open position according to a door opening program, and an unlocking operation stroke is ensured to be reserved;

when the gate needs to be automatically closed, the electromagnet I is powered on, the electromagnet I is powered off after the locking oil cylinder is unlocked in place, the electromagnetic valve II is powered on, oil in a rod cavity of the hydraulic cylinder enters a rodless cavity of the hydraulic cylinder after the door closing speed of the oil in the rod cavity of the hydraulic cylinder is adjusted by the one-way throttle valve and the two-way cartridge valve, meanwhile, oil in an oil supplementing tank is supplemented to the rodless cavity of the hydraulic cylinder through the hydraulic control liquid charging valve, the gate is closed in place;

when the gate needs to be manually closed in an emergency power-off state, the ball valve I is manually opened, the ball valve I is manually closed after the oil cylinder to be locked is unlocked in place, the ball valve II is manually opened again, oil in a rod cavity of the hydraulic cylinder enters a rodless cavity of the hydraulic cylinder after the speed of door closing is adjusted by the one-way throttle valve and the two-way cartridge valve, meanwhile, oil in an oil supplementing tank is supplemented to the rodless cavity of the hydraulic cylinder through the hydraulic control liquid charging valve, and the gate is closed in place.

Technical Field

The invention relates to a hydraulic hoist capable of being unlocked and closed in a black start mode. Is suitable for water conservancy and hydropower engineering and similar fields.

Background

The existing hydraulic hoist is provided with a locking device for ensuring the possibility of opening the gate, the unlocking operation is required before the gate is closed, then the closing operation is carried out, a power supply and a control power supply are required to provide power through a motor pump set during the operation, a control valve set is used for operating the hydraulic hoist to unlock, and then the gate is closed. However, when extreme special conditions such as an earthquake and a water flooded factory building occur, a power supply fault is easily caused, the gate cannot be operated to close, so that the expansion of accidents is difficult to avoid, and the operation safety of the power station is influenced to a certain extent.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the existing problems, the hydraulic hoist which has simple structure, safety and reliability and can be unlocked and closed in a black-start mode under the condition of no electricity is provided.

The technical scheme adopted by the invention is as follows: the utility model provides a hydraulic hoist that can black start unblock was closed has the hydraulic control system who connects the pneumatic cylinder of gate and control pneumatic cylinder action, install the locking mechanical system that can lock the interior piston rod of pneumatic cylinder on the pneumatic cylinder, its characterized in that: the locking mechanism is controlled by a locking oil cylinder to act, a left (A) end side cavity of the locking oil cylinder is respectively communicated with a pressure oil loop of a lower cavity of the hydraulic cylinder through a ball valve I or an electromagnetic valve I, and oil in a right (B) end side cavity returns to an oil tank through a reversing valve, so that unlocking operation is realized;

a rod cavity of the hydraulic cylinder is communicated with a pressure oil loop of the electro-hydraulic control system after being throttled by the one-way throttle valve and the two-way cartridge valve, the function of the two-way cartridge valve is controlled by the solenoid valve II or the ball valve II, and a rodless cavity of the hydraulic cylinder is connected with the oil replenishing tank and the main oil tank through the liquid charging valve.

The locking mechanism is provided with a locking body and a locking rod, wherein the locking rod is positioned in a rodless cavity of the hydraulic cylinder and is coaxially connected to the piston rod, and a locking seat is arranged at the end, far away from the piston rod, of the locking rod;

the locking body is arranged at the end part of a rodless cavity of the hydraulic cylinder, the length direction of the locking body is vertical to the axial direction of the locking rod, a small round hole for the locking rod to pass through and a large round hole for the locking seat to pass through are formed in the locking body along the length direction of the locking body, and the small round hole and the large round hole are combined to form a pear-shaped hole;

the small round hole end in the length direction of the locking body is connected with a piston rod at the B end of the locking oil cylinder through a connecting rod, the large round hole end in the length direction of the locking body is connected with a compensating rod, and the compensating rod is inserted into a compensating sleeve connected to the hydraulic cylinder.

The locking cylinder is provided with a bidirectional piston rod

And a stroke monitoring device for acquiring the position of the locking rod is installed at the end part of the rodless cavity of the hydraulic cylinder, and the stroke monitoring device is connected with a control unit of the hydraulic control system.

The invention has the beneficial effects that: in the embodiment, when the system is in a normal working state, the hydraulic system can normally operate the opening and closing of the hydraulic cylinder and the unlocking and unlocking of the locking cylinder by controlling the hydraulic valve bank, when the system is in a working condition that power electricity is lost and a direct-current control power supply is reserved, and the gate is controlled to be automatically closed, the electromagnetic valve I is operated, the locking mechanism on the hydraulic cylinder is unlocked, and then the electromagnetic valve II is operated, and the gate is closed by self weight; when the system is in a state of losing all power supplies, namely a black start state, the ball valve I is sequentially operated in sequence, the locking mechanism of the hydraulic cylinder is unlocked, the ball valve II is operated, and the gate is closed by means of dead weight, so that the response to the operation requirement to the fastest degree is realized, and the loss of an earthquake, a water flooded workshop and other extreme special conditions is reduced.

Drawings

Fig. 1 is a schematic diagram of the embodiment.

Fig. 2 is a schematic view of a locking mechanism in an embodiment.

Fig. 3 is a sectional view a-a of fig. 2.

In the figure: 1-1, a locking rod; 1-2, a compensation rod; 1-3, a locking body; 1-4, locking a cylinder piston rod; 1-5, a travel monitoring device; 2-1, locking the oil cylinder; 2-2, a ball valve I; 2-3, an electromagnetic valve I; 3-1, oil supplementing tank; 3-2, a one-way throttle valve; 3-3, an electromagnetic valve II; 3-4, a ball valve II; 3-5, a two-way cartridge valve; 3-6, and a liquid filling valve.

Detailed Description

The embodiment is a hydraulic hoist capable of being unlocked and closed by black start, which is provided with a hydraulic cylinder connected with a gate and a hydraulic control system for controlling the action of the hydraulic cylinder, wherein the hydraulic cylinder is provided with a locking mechanism capable of locking a piston rod in the hydraulic cylinder.

The locking mechanism comprises a locking body and a locking rod, wherein the locking rod is positioned in a rodless cavity of the hydraulic cylinder and coaxially connected to the piston rod, and a locking seat is arranged on the end, far away from the piston rod, of the locking rod; the locking body is arranged at the end position in a rodless cavity of the hydraulic cylinder, the length direction of the locking body is perpendicular to the axial direction of the locking rod, a pear-shaped hole formed by combining a large round hole and a small round hole is formed in the locking body along the length direction of the locking body, the small round hole can be used for the locking rod to pass through, the locking seat is limited to pass through, the large round hole can be used for the locking seat to pass through, and the locking rod can move back and forth in the pear-shaped hole along the length direction of the locking body.

In the embodiment, a locking oil cylinder is arranged outside the hydraulic cylinder, two ends of the locking oil cylinder are named as an end A and an end B respectively, a piston rod at the end B of the locking oil cylinder is directly connected with a locking body, and a piston rod of the locking cylinder is parallel to the length direction of the locking body and is connected with a clamping groove in the length direction of the locking body in parallel. In the embodiment, the large round hole end in the length direction of the locking body is connected with the compensation rod, the compensation rod is inserted into the compensation sleeve connected to the hydraulic cylinder, the compensation rod is arranged, the volume of the upper cavity is kept unchanged during operation of the locking body, additional load is avoided, and meanwhile, the locking cylinder is provided with the bidirectional piston rod, so that the additional load is avoided due to temperature change of the locking cylinder.

In the embodiment, a stroke monitoring device for acquiring a piston rod of the locking hydraulic cylinder is arranged at the end part of a rodless cavity of the hydraulic cylinder, a stroke switch for monitoring the position of the locking block is arranged on the outer side of the compensation rod, and the stroke monitoring device and the stroke switch are connected with a control unit of a hydraulic control system to control the actions of the locking oil cylinder and a hydraulic hoist.

The locking rod of the hydraulic cylinder is provided with a working stroke L in the embodiment, so that the requirement that the piston rod of the hydraulic cylinder slides down when the system is unlocked is met

In the embodiment, the side chamber at the A end of the locking oil cylinder is communicated with a pressure pipeline of a hydraulic control system through a parallel pipeline of the ball valve I and the electromagnetic valve I. A rod cavity of the hydraulic cylinder is communicated with a pressure oil loop of the electro-hydraulic control system after being throttled by the one-way throttle valve and the two-way cartridge valve, the function of the two-way cartridge valve is controlled by the electromagnetic valve II or the ball valve II, and a rodless cavity of the hydraulic cylinder returns to the oil supplementing tank and the main oil tank through the liquid charging valve.

The working principle of the embodiment is as follows: when the stroke monitoring device monitors that the hydraulic cylinder piston and the locking rod slide downwards for a certain distance, the oil pump is started to return to the full-open position according to a door opening program, and the unlocking operation stroke is ensured to be reserved.

When the gate needs to be automatically closed, the electromagnet I is powered on, the electromagnet I is powered off after the locking oil cylinder is unlocked in place, the electromagnetic valve II is powered on, oil in a rod cavity of the hydraulic cylinder enters a rodless cavity of the hydraulic cylinder after the door closing speed of the oil in the rod cavity of the hydraulic cylinder is adjusted through the one-way throttle valve and the two-way cartridge valve, meanwhile, oil in an oil supplementing tank is supplemented to the rodless cavity of the hydraulic cylinder through the hydraulic control liquid charging valve, the gate is closed in place.

When the gate needs to be manually closed in an emergency power-off state, the ball valve I is manually opened, the ball valve I is manually closed after the oil cylinder to be locked is unlocked in place, the ball valve II is manually opened again, oil in a rod cavity of the hydraulic cylinder enters a rodless cavity of the hydraulic cylinder after the speed of door closing is adjusted by the one-way throttle valve and the two-way cartridge valve, meanwhile, oil in an oil supplementing tank is supplemented to the rodless cavity of the hydraulic cylinder through the hydraulic control liquid charging valve, and the gate is closed in place.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should understand that they can make various changes, additions and substitutions within the scope of the present invention.