A gate valve electro-hydraulic actuator

Abstract

The present invention proposes a gate valve electro-hydraulic actuator, comprising a gate valve, which is arranged on a pipeline and controls the conduction or closure of the pipeline; a piston mechanism connected to the gate valve, which drives the gate valve to open or close through a valve stem; and an accumulator connected to the piston mechanism, which is configured to provide hydraulic pressure to the piston mechanism in an emergency state and enable the piston mechanism to push the gate valve to close urgently; wherein, a manual device is also connected to the gate valve, which manually drives the gate valve to close. The present invention can close the gate valve through a manual wheel when the emergency shut-off device fails, and the handwheel can automatically pop open when the valve is shut off urgently, and cannot rotate with the valve stem. When using the handwheel, push the handwheel in, embed the buckle, and use the speed change principle at the same time, so that a single person can easily open or close the valve.

Description

Technical Field

[0001] The invention relates to a gate valve electro-hydraulic actuator, in particular to a gate valve electro-hydraulic actuator with a manual device, and belongs to the field of pipeline gate valve electro-hydraulic actuators. Background Art

[0002] Currently, when the power is off, a manual pump is used to pump hydraulic oil to open or close the valve. However, if the hydraulic system pipeline or hydraulic accessories fail in this situation, the manual pump will no longer work, which will affect the valve operation. Therefore, a new handwheel device has been designed. It uses a mechanical gear rack to contact the valve stem, eliminating the need for a hydraulic system. This allows for manual and automatic operation and long-term reliability.

[0003] At the same time, it ensures that the handwheel will not rotate with the valve stem when the valve is shut off in an emergency, thereby eliminating the hazards of abnormal automatic valve closing. If there is no disengagement device, the accidental emergency shutoff of the valve when the handwheel is operated will cause the handwheel to rotate at high speed and injure the human body. Summary of the Invention

[0004] To address the aforementioned technical issues in the prior art and to ensure that the handwheel does not rotate with the valve stem during an emergency shutoff, thereby eliminating the hazards of abnormal automatic valve closure, the present invention proposes an electro-hydraulic gate valve actuator. This mechanism allows the gate valve to be closed via a manual wheel in the event of a malfunction in the emergency shutoff mechanism. During emergency shutoff, the handwheel automatically springs open and does not rotate with the valve stem. To use the handwheel, push it in, engage the latch, and, utilizing the speed-changing principle, a single person can easily open or close the valve.

[0005] The present invention provides a gate valve electro-hydraulic actuator, comprising:

[0006] A gate valve, which is installed on the pipeline and controls the pipeline to be open or closed;

[0007] A piston mechanism connected to the gate valve, the piston mechanism driving the gate valve to open or close via a valve stem; and

[0008] an accumulator connected to the piston mechanism, the accumulator being configured to provide hydraulic pressure to the piston mechanism in an emergency state, and to enable the piston mechanism to push the gate valve to close in an emergency;

[0009] Wherein, the gate valve is also connected to a manual device, and the manual device manually drives the gate valve to open or close.

[0010] When the emergency shut-off device fails, the operator can open or close the gate valve by manual wheel to ensure the smooth opening or closing of the gate valve.

[0011] A further improvement of the present invention is that the piston mechanism includes a piston cylinder and a piston disposed in the piston cylinder, and the piston is provided with a piston rod connected to the valve stem;

[0012] The piston divides the space in the piston cylinder into an upper space and a lower space, and the upper space and the lower space are respectively connected to oil tanks.

[0013] A further improvement of the present invention is that the accumulator is connected to the upper space of the piston mechanism through an emergency pipeline. In a normal state, the emergency pipeline is closed; when the gate valve needs to be urgently shut off, the emergency pipeline is opened, and the oil in the accumulator enters the upper space, pushing the piston to move downward, thereby closing the gate valve.

[0014] A further improvement of the present invention is that the manual device includes an upper bracket connected to the piston rod and a lower bracket connected to the valve stem of the gate valve, and an intermediate bracket is provided between the upper bracket and the bracket; the side of the intermediate bracket is connected to the manual wheel through a force transmission component.

[0015] A further improvement of the present invention is that the force transmission component includes a gear disposed in the intermediate bracket, and a rack cooperating with the gear;

[0016] The rack is connected to the valve stem; the gear is connected to a gearbox, and the gearbox is connected to the manual wheel through a connecting module and a matching module; the connecting module and the matching module can be separated or connected.

[0017] A further improvement of the present invention is that the connecting module is connected to the gearbox, the supporting module is connected to the manual wheel, a fixing pin is provided on the connecting module, and a pin hole is provided on the supporting module, and the fixing pin can be inserted into the pin hole;

[0018] When manually closing the gate valve by means of the manual wheel, the connecting module is connected to the matching module by first pushing the manual wheel inward, and then the manual wheel is rotated in a first direction, which drives the gear to rotate through the gearbox, and the gear drives the rack to move downward, thereby closing the gate valve, and then the manual wheel is pulled out to separate the connecting module from the matching module;

[0019] When the gate valve is manually opened by the manual wheel, the connecting module is connected to the matching module when the manual wheel is first pushed inward, and the manual wheel is rotated in the second direction to drive the gear to rotate through the gearbox, and the gear drives the rack to move upward, thereby opening the gate valve, and then the manual wheel is pulled out to separate the connecting module from the matching module.

[0020] In the event of a malfunction in the emergency shutoff device, the gate valve can be closed manually. During emergency shutoff, the handwheel automatically springs open and cannot rotate with the valve stem. When using the handwheel, push it in, engage the buckle, and utilize the variable speed principle to easily open or close the valve by one person.

[0021] A further improvement of the present invention is that the force transmission component further includes an oil inlet sleeve, and the oil inlet sleeve is connected to the connection module;

[0022] A handwheel hydraulic pipeline connected to the force transmission component is provided on the emergency pipeline, and the handwheel hydraulic pipeline is connected to the oil lubricating sleeve; in emergency cut-off, the hydraulic oil of the accumulator enters the oil inlet lubricating sleeve through the handwheel hydraulic pipeline, and then enters the connecting module, and the connecting module and the supporting module are driven to separate under the pressure of the hydraulic oil.

[0023] Rotating the manual wheel transmits the rotational force to the intermediate bracket via the force transmission component. The intermediate bracket converts the rotational force into a force that drives the valve stem to move axially. If the hydraulic system fails, the gate valve is opened or closed manually. At this time, the operator rotates the manual wheel to move the lower bracket downward or upward, thereby closing or opening the gate valve.

[0024] A further improvement of the present invention is that a connecting module oil chamber is provided in the middle of the connecting module, a disengagement piston is provided on the connecting module oil chamber, and the disengagement piston cooperates with the support rod in the middle of the matching module;

[0025] After the oil in the oil-inlet sleeve enters the oil cavity of the connecting module, it drives the disengagement piston to extend and pushes the matching module to move, so that the fixing pin and the pin hole are separated.

[0026] In the gate valve electro-hydraulic actuator described in the present invention, the handwheel hydraulic pipeline is located at the branch of the oil pipeline on the upper part of the piston cylinder. At the same time of emergency cutting, the accumulator's high-pressure hydraulic oil enters the oil inlet sleeve through the handwheel hydraulic pipeline, thereby disengaging the grooves of the connecting module and the matching module, and then disengaging the handwheel.

[0027] A further improvement of the present invention is that fixing flanges are provided on the outer sides of the connecting module and the oil inlet sleeve, and the fixing flanges are connected to the gearbox.

[0028] A further improvement of the present invention is that a support bracket is provided inside the intermediate bracket;

[0029] One side of the rack is provided with teeth and meshes with the gear; the other side is supported by the support bracket.

[0030] A further improvement of the present invention is that the lower end of the rack is connected to the valve stem via a threaded sleeve.

[0031] A further improvement of the present invention is that a position indicating nut is provided in the middle of the manual wheel.

[0032] Compared with the prior art, the advantages of the present invention are:

[0033] The gate valve electro-hydraulic actuator of the present invention allows the gate valve to be closed by a manual wheel in the event of a malfunction in the emergency shutoff mechanism. During emergency shutoff, the handwheel automatically springs open and cannot rotate with the valve stem. When in use, the handwheel is pushed in, engaging the buckle, and utilizing the speed-changing principle, a single person can easily open or close the valve.

[0034] In the gate valve electro-hydraulic actuator of the present invention, rotating the manual wheel transmits rotational force to the intermediate bracket via a force transmission component. The intermediate bracket converts the rotational force into a force that drives the valve stem axially. In the event of hydraulic system failure, the gate valve can be opened or closed manually. In this case, the operator rotates the manual wheel to cause the lower bracket to move the valve stem downward or upward, thereby closing or opening the gate valve.

[0035] In the gate valve electro-hydraulic actuator described in the present invention, the handwheel hydraulic pipeline is located at the branch of the oil pipeline on the upper part of the piston cylinder. At the same time of emergency cutting, the accumulator's high-pressure hydraulic oil enters the oil inlet sleeve through the handwheel hydraulic pipeline, thereby disengaging the grooves of the connecting module and the matching module, and then disengaging the handwheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0037] Figure 1 Shown is a structural schematic diagram of a gate valve electro-hydraulic actuator according to an embodiment of the present invention.

[0038] Figure 2 It is a schematic structural diagram of a manual device according to an embodiment of the present invention; it shows the main view structure;

[0039] Figure 3 It is a schematic structural diagram of a manual device according to an embodiment of the present invention; it shows the structure from a side view;

[0040] Figure 4 for Figure 2 AA section view;

[0041] Figure 5 Shown is a schematic structural diagram of a connection module and a matching module according to an embodiment of the present invention.

[0042] The drawings are not drawn to scale.

[0043] The meanings of the reference numerals in the accompanying drawings are as follows:

[0044] 1. Gate valve, 2. Piston mechanism, 3. Accumulator, 4. Upper bracket, 5. Lower bracket, 6. Intermediate bracket, 7. Manual wheel, 8. Force transmission component, 11. Pipeline, 12. Valve stem, 21. Piston cylinder, 22. Piston rod, 23. Piston, 24. Upper space, 25. Lower space, 31. Emergency pipeline, 61. Gear, 62. Rack, 63. Support bracket, 64. Screw sleeve, 71. Matching module, 72. Positioning nut, 81. Connection module, 82. Gearbox, 83. Fixed flange, 84. Oil inlet sleeve, 85. Handwheel hydraulic pipeline, 86. Mounting sheet metal, 87. Connection module oil chamber, 88. Fixing pin, 89. Disengagement piston. DETAILED DESCRIPTION

[0045] To make the technical solutions and advantages of the present invention more clearly understood, exemplary embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are only a portion of the embodiments of the present invention, and are not exhaustive. Furthermore, the embodiments and features of the embodiments of the present invention may be combined with each other unless there is a conflict.

[0046] Currently, in the event of a power outage, the valve is opened or closed by pumping hydraulic oil with a manual pump. However, in this case, once the hydraulic system pipeline or hydraulic accessories fail, the manual pump will not be able to continue working, thereby affecting the valve action.

[0047] Furthermore, the handwheel can output a force of 70,000N to 150,000N, covering the thrust required by common valves. The manual input force is less than 800N, making it easy for a single person to operate, and the time required to manually open and close the valve can also adapt to on-site requirements. At the same time, operator safety must be ensured when operating the handwheel to open and close gate valve 1, especially considering the hazards of emergency shutoffs. For example, if the valve is accidentally shut off while the handwheel is being operated, it will cause the handwheel to rotate at high speed, potentially causing harm to the human body. Therefore, when the valve is shut off in an emergency, the handwheel should automatically pop open and should not rotate with the valve stem 12. When using the handwheel, the handwheel is pushed in, the buckle is inserted, and the speed-changing principle is utilized, allowing a single person to easily open or close the valve.

[0048] To address the above-mentioned problems, the present invention proposes a gate valve electro-hydraulic actuator. When the emergency shut-off device fails, the gate valve 1 can be closed by a manual wheel 7. When the valve is shut off in an emergency, the handwheel automatically springs open and cannot rotate with the valve stem 12. When the handwheel is in use, the handwheel is pushed in, the buckle is engaged, and the speed-changing principle is utilized, allowing a single person to easily open or close the valve.

[0049] In one embodiment, Figure 1 A gate valve electro-hydraulic actuator according to the present invention is schematically shown, comprising:

[0050] The gate valve 1 is arranged on the pipeline 11. When the gate valve 1 is open, the pipeline 11 is connected; when the gate valve 1 is closed, the pipeline 11 is closed.

[0051] The gate valve 1 is connected to the piston mechanism 2 via the valve stem 12, and the piston mechanism 2 drives the gate valve 1 to open or close;

[0052] The piston mechanism 2 is connected to an accumulator 3 , which can provide hydraulic pressure to the piston mechanism 2 in an emergency state, so that the piston mechanism 2 pushes the gate valve 1 to close urgently.

[0053] The gate valve 1 is also connected to a manual device, which manually drives the gate valve 1 to open or close.

[0054] In the gate valve electro-hydraulic actuator according to this embodiment, the accumulator 3 stores high-pressure hydraulic oil for emergency shutoff of the gate valve 1. When the gate valve 1 is shut off in an emergency, the hydraulic oil in the accumulator 3 is injected into the piston mechanism 2. The piston mechanism 2 moves downward under the action of the hydraulic pressure, driving the valve stem 12 downward, thereby pushing the gate valve 1 to close and achieve emergency shutoff.

[0055] When the hydraulic system is damaged, when the gate valve 1 is to be opened or closed, the gate valve 1 is manually driven to be opened or closed by operating the manual device.

[0056] In one embodiment, the piston mechanism 2 includes a piston cylinder 21, within which a piston 23 is disposed. The piston 23 is provided with a piston rod 22, which is connected to the valve stem 12. The piston 23 divides the space within the piston cylinder 21 into an upper space 24 and a lower space 25. The upper space 24 and the lower space 25 are each connected to an oil tank. The pipeline connecting the upper space 24 and the lower space 25 in the oil tank is connected to a pumping device, which pumps oil from the oil tank into the piston chamber or pumps oil from the piston chamber back into the oil tank.

[0057] When closing the gate valve 1, the oil in the oil tank is pumped into the upper space 24 of the piston cylinder 21, and the oil in the lower space 25 of the piston cylinder 21 flows back into the oil tank. The piston moves downward under the drive of the hydraulic pressure, thereby driving the valve stem 12 to move downward, and the valve stem 12 drives the gate valve 1 to close. When opening the gate valve 1, the oil in the oil tank is pumped into the lower space 25 of the piston cylinder 21, and the oil in the upper space 24 of the piston cylinder 21 flows back into the oil tank. The piston moves upward under the drive of the hydraulic pressure, thereby driving the valve stem 12 to move upward, and the valve stem 12 drives the gate valve 1 to open.

[0058] Preferably, the upper space 24 of the piston mechanism 2 is connected to the accumulator 3 via an emergency line 31. The accumulator 3 stores hydraulic oil and accumulates a certain pressure. Under normal conditions, the emergency line 31 is closed, and the accumulator 3 is in a charged state. In an emergency, the emergency line 31 is opened, connecting the accumulator 3 to the upper space 24 of the piston mechanism 2, and the hydraulic pressure within the accumulator 3 is rapidly charged into the upper space 24. The oil in the lower space 25 of the piston mechanism 2 flows into the oil tank, causing the piston to move downward, thereby driving the valve stem 12 downward, and the valve stem 12 drives the gate valve 1 to close.

[0059] In this embodiment, the accumulator 3 preferably comprises a housing and an airbag disposed within the housing. The airbag divides the space within the housing into two sections. The upper section, the airbag interior, is pre-filled with nitrogen at a certain pressure. Gear 61 continuously pumps hydraulic oil into the lower section of the accumulator 3. As the hydraulic oil continues to enter, it squeezes the airbag, compressing the nitrogen within. This gradually increases the pressure within the accumulator 3, generating emergency shutoff energy. When an emergency shutoff is required, the hydraulic oil in the lower section, propelled by the airbag, enters the hydraulic line, thereby initiating the emergency shutoff.

[0060] In one embodiment, Figure 2 and Figure 3 As shown, the manual device includes an upper bracket 4 connected to the piston rod 22 and a lower bracket 4 connected to the gate valve 1, and an intermediate bracket 6 is provided between the upper bracket 4 and the brackets; the side of the intermediate bracket 6 is connected to the manual wheel 7 through a force transmission component 8.

[0061] Rotating the manual wheel 7 transmits the rotational force to the intermediate bracket 6 via the force transmission component 8. The intermediate bracket 6 converts the rotational force into a force that drives the valve stem 12 to move axially. When the hydraulic system is damaged, the gate valve 1 is opened or closed manually. At this time, the operator rotates the manual wheel 7 to move the lower bracket 4 and the valve stem 12 downward or upward, thereby closing or opening the gate valve 1.

[0062] In one embodiment, the manual wheel 7 is connected to the force transmission component 8 in a clutchable manner. In a normal state, there is a certain distance between the manual wheel 7 and the force transmission component 8, and the two are not connected. When the manual wheel 7 needs to be operated to control the gate valve 1, the manual wheel 7 is pushed to connect with the force transmission component 8, and then the manual wheel 7 is rotated. The force transmission component 8 transmits the twisting force of the rotating wheel to the intermediate bracket 6, thereby controlling the valve stem 12 to move up and down.

[0063] When using the gate valve electro-hydraulic actuator according to this embodiment, when the hydraulic system is damaged, the gate valve 1 is controlled by the manual wheel 7. First, the manual wheel 7 is pushed to connect the manual wheel 7 to the force transmission component 8. At this time, rotating the manual wheel 7 can push or pull the valve stem 12, thereby driving the gate valve 1 to close or open.

[0064] In one embodiment, Figure 4 As shown, the force transmission component 8 includes a gear 61 and a rack 62 disposed within the intermediate bracket 6. Both the gear 61 and the rack 62 are provided with teeth that mesh with each other. When the gear 61 rotates, the teeth transmit torsional force to the rack 62, driving the rack 62 to move axially. The rack 62 is connected to the valve stem 12; the gear 61 is connected to a gearbox 82, which is connected to the manual wheel 7 via a connecting module 81 and a matching module 71. The connecting module 81 and the matching module 71 can be separated or connected.

[0065] In the gate valve electro-hydraulic actuator according to this embodiment, the connecting module 81 and the supporting module 71 can be connected in a plug-in manner. When the manual wheel 7 is pushed inward, the connecting module 81 is connected to the supporting module 71. The torque generated by the rotation of the manual wheel 7 can be transmitted to the gearbox 82 through the supporting module 71 and the connecting module 81. The gearbox 82 transmits the torque to the gear 61 after deceleration. The gear 61 engages with the rack 62, thereby driving the rack 62 to move up and down, and then driving the valve stem 12 to move up and down, and finally closing or opening the gate valve 1.

[0066] The gearbox 82 can reduce the force of twisting the manual wheel 7 , so that the operator can twist the manual wheel 7 to operate the gate valve 1 .

[0067] In one embodiment, Figure 5 As shown, the connecting module 81 is connected to the gearbox 82, the matching module 71 is connected to the manual wheel 7, a fixing pin 88 is provided on the connecting module 81, and a pin hole is provided on the matching module 71, and the fixing pin 88 can be inserted into the pin hole.

[0068] When the gate valve 1 is manually closed by the manual wheel 7, the manual wheel 7 is first pushed inward to connect the connecting module 81 with the matching module 71. The manual wheel 7 is rotated in a first direction to drive the gear 61 to rotate through the gearbox 82. The gear 61 drives the rack 62 to move downward, thereby closing the gate valve 1. The manual wheel 7 is then pulled out to separate the connecting module 81 from the matching module 71.

[0069] When the gate valve 1 is manually opened by the manual wheel 7, the connecting module 81 is connected to the supporting module 71 when the manual wheel 7 is first pushed inward, and the manual wheel 7 is rotated in the second direction to drive the gear 61 to rotate through the gearbox 82. The gear 61 drives the rack 62 to move upward, thereby opening the gate valve 1. Then, the manual wheel 7 is pulled out to separate the connecting module 81 from the supporting module 71.

[0070] The first direction and the second direction are opposite. For example, if the first direction is clockwise, the second direction is counterclockwise; if the first direction is counterclockwise, the second direction is clockwise.

[0071] Preferably, the fixing pins 88 are evenly arranged along the circumference of one side of the connecting module 81, and the pin holes of the matching module 71 match the positions of the fixing pins 88. When the manual wheel 7 is pushed closer to the intermediate bracket 6, the fixing pins 88 are inserted into the pin holes, and the matching module 71 is connected to the connecting module 81; when the manual wheel 7 is pulled away from the intermediate bracket 6, the fixing pins 88 are disengaged from the pin holes, and the matching module 71 is separated from the connecting module 81. In this way, the rotation of the manual wheel 7 will not affect the opening and closing of the gate valve 1, and the opening and closing of the gate valve 1 will not drive the manual wheel 7 to rotate, thereby preventing the rotation of the manual wheel 7 from injuring the human body or other nearby devices.

[0072] In one embodiment, the force transmission component 8 further includes an oil inlet sleeve 84 , and the oil inlet sleeve 84 is connected to the connection module 81 ;

[0073] The emergency pipeline 31 is provided with a handwheel hydraulic pipeline 85 connected to the force transmission component 8, and the handwheel hydraulic pipeline 85 is connected to the oil lubricating sleeve; in emergency cut-off, the hydraulic oil of the accumulator 3 enters the oil inlet lubricating sleeve 84 through the handwheel hydraulic pipeline 85, and then enters the connecting module 81, and drives the connecting module 81 and the supporting module 71 to separate under the action of the pressure of the hydraulic oil.

[0074] In the gate valve electro-hydraulic actuator according to this embodiment, the handwheel hydraulic pipeline 85 is located at a branch of the oil pipeline on the upper part of the piston cylinder 21. At the same time of emergency cut-off, the high-pressure hydraulic oil of the accumulator 3 enters the oil inlet sleeve 84 through the handwheel hydraulic pipeline 85, thereby disengaging the connecting module 81 from the groove of the matching module 71, and then disengaging the handwheel.

[0075] In this way, the hand wheel will not rotate with the valve stem 12 when the gate valve 1 is shut off in an emergency, thereby preventing the harm caused by abnormal automatic closing of the valve. If there is no disengagement device, the valve will be shut off unexpectedly in an emergency when a person operates the manual wheel 7, causing the manual wheel 7 to rotate at high speed and injure the human body.

[0076] In one embodiment, a connection module oil chamber 87 is provided in the middle of the connection module 81 , and a disengagement piston 89 is provided on the connection module oil chamber 87 . The disengagement piston 89 can cooperate with the support rod in the middle of the matching module 71 .

[0077] After the oil in the oil-inlet sleeve 84 enters the oil chamber 87 of the connection module, it drives the disengagement piston 89 to extend and pushes the matching module 71 to move, so that the fixing pin 88 is separated from the pin hole.

[0078] At the same time as the emergency cut-off, the high-pressure hydraulic oil of the accumulator 3 enters the oil inlet sleeve 84 through the handwheel hydraulic pipeline 85, and then enters the connecting module oil chamber 87 of the connecting module 81. The high-pressure hydraulic oil in the connecting module oil chamber 87 pushes the matching module 71 outward, and the fixing pin 88 on the connecting module 81 disengages from the groove of the matching module 71, thereby disengaging the handwheel.

[0079] In one embodiment, Figure 4 As shown, a fixing flange 83 is provided on the outer side of the connecting module 81 and the oil inlet sleeve 84 , and the fixing flange 83 is connected to the gearbox 82 .

[0080] Preferably, a support bracket 63 is provided inside the intermediate bracket 6;

[0081] One side of the rack 62 is provided with teeth and meshes with the gear 61 ; the other side is supported by the support bracket 63 .

[0082] In this embodiment, the support bracket 63 is disposed opposite the roller, with the roller disposed on one side of the rack 62 having teeth, and the support bracket 63 disposed on the other side, and the two components clamp the rack 62. In this embodiment, the support bracket 63 may be a roller structure, allowing the support bracket 63 to roll on the rack 62 as the rack 62 moves; or the support bracket 63 may be a smooth arc-shaped structure, with the side of the support bracket 63 not provided with the rack 62 being smooth, allowing the support bracket 63 and the rack 62 to slide relative to each other.

[0083] In a preferred embodiment, the lower end of the rack 62 is connected to the valve stem 12 via a screw sleeve 64. Specifically, the inner side of the rack 62 is embedded with a screw sleeve 64, which is connected to the valve stem 12. When the rack 62 moves up and down, the gate valve 1 is driven to open and close.

[0084] In one embodiment, Figure 3 As shown, a position indicating nut 72 is provided in the middle of the manual wheel 7. The position indicating nut 72 has a pointer, and the operator can judge the position relationship between the manual wheel 7 (including the supporting module 71) and the connecting module 81 by the pointer, so that the operator can judge whether the gate valve 1 is in place while operating the manual wheel 7.

[0085] In the gate valve electro-hydraulic actuator described in this embodiment, accumulator 3 stores high-pressure hydraulic oil for emergency shutoff of the valve. When the valve is in emergency shutoff mode, the hydraulic oil in accumulator 3 flows through emergency line 31 of piston cylinder 21 into the upper space 24 of the piston, pushing the piston downward. The hydraulic oil in the lower space 25 of the piston flows back to the oil tank through the lower oil line of piston cylinder 21. The downward movement of the piston drives the valve stem 12 downward, achieving emergency shutoff of the valve.

[0086] When the hydraulic system is damaged and you want to open or close the valve, do the following:

[0087] Push the manual wheel 7 toward the middle bracket 6, and the manual wheel 7 moves inward, so that the fixing pin 88 on the connecting module 81 is inserted into the groove of the matching module 71, so that the connecting module 81 is connected to the matching module 71, and the manual wheel 7 is manually rotated to drive the transmission to rotate.

[0088] As the transmission rotates, it is decelerated and drives the gear 61 to rotate. The rotation of the gear 61 drives the rack 62 to move up and down through the teeth.

[0089] The bottom of the rack 62 is inlaid with a screw sleeve 64, which is connected to the valve stem 12. The rack 62 drives the gate valve 1 to do an on-off motion while moving up and down.

[0090] When the operation is finished, the manual wheel 7 can be manually pulled outward, thereby causing the fixing pin 88 on the connecting module 81 to disengage from the groove of the matching module 71, and then the manual wheel 7 is disengaged, so as to ensure that the hand wheel will not rotate at high speed during the next emergency cutoff.

[0091] If you forget to disengage the handwheel, the following protective measures will come into effect:

[0092] When the hydraulic system is normal, such as when the gate valve 1 performs emergency shut-off, the hydraulic oil in the accumulator 3 enters the upper space 24 of the piston cylinder 21 through the upper oil pipeline of the piston cylinder 21, pushing the piston to move downward, and the hydraulic oil in the lower space 25 of the piston flows back to the oil tank through the lower oil pipeline of the piston cylinder 21. When the piston moves downward, it drives the valve stem 12 to move downward, realizing the emergency shut-off of the gate valve 1.

[0093] The handwheel hydraulic pipeline 85 is located at the branch of the emergency pipeline 31 on the upper part of the piston cylinder 21. At the same time of emergency cutting, the high-pressure hydraulic oil of the accumulator 3 enters the oil inlet sleeve 84 through the handwheel hydraulic pipeline 85, and then enters the connecting module oil chamber 87. The high-pressure hydraulic oil in the connecting module oil chamber 87 pushes the matching module 71 outward, and the fixing pin 88 on the connecting module 81 disengages from the groove of the matching module 71, thereby disengaging the handwheel.

[0094] In this way, the hand wheel will not rotate with the valve stem 12 when the gate valve 1 is shut off in an emergency, thereby eliminating the hazards of abnormal automatic valve closing. If there is no disengagement device, the gate valve 1 will be shut off in an emergency when a person operates the manual wheel 7, which will cause the hand wheel to rotate at high speed and cause harm to the human body.

[0095] The following describes the specific embodiments:

[0096] Example 1

[0097] According to the gate valve electro-hydraulic actuator described in this embodiment, it includes: a gate valve 1, which is arranged on a pipeline 11. When the gate valve 1 is open, the pipeline 11 is connected; when the gate valve 1 is closed, the pipeline 11 is closed.

[0098] The gate valve 1 is connected to the piston mechanism 2 via a valve stem 12 , and the piston mechanism 2 drives the gate valve 1 to open or close.

[0099] The piston mechanism 2 is connected to an accumulator 3 , which can provide hydraulic pressure to the piston mechanism 2 in an emergency state, so that the piston mechanism 2 pushes the gate valve 1 to close urgently.

[0100] The gate valve 1 is also connected to a manual device, which is used to manually drive the gate valve 1 to close.

[0101] The piston mechanism 2 includes a piston cylinder 21, within which a piston is disposed. A piston rod 22 is mounted on the piston, which is connected to the valve stem 12. The piston divides the space within the piston cylinder 21 into an upper space 24 and a lower space 25, each of which is connected to an oil tank. The pipeline connecting the upper and lower spaces 24 and 25 in the oil tank is connected to a pumping device, which pumps oil from the oil tank into the piston chamber or back into the oil tank.

[0102] When closing the gate valve 1, the oil in the oil tank is pumped into the upper space 24 of the piston cylinder 21, and the oil in the lower space 25 of the piston cylinder 21 flows back into the oil tank. The piston moves downward under the drive of the hydraulic pressure, thereby driving the valve stem 12 to move downward, and the valve stem 12 drives the gate valve 1 to close. When opening the gate valve 1, the oil in the oil tank is pumped into the lower space 25 of the piston cylinder 21, and the oil in the upper space 24 of the piston cylinder 21 flows back into the oil tank. The piston moves upward under the drive of the hydraulic pressure, thereby driving the valve stem 12 to move upward, and the valve stem 12 drives the gate valve 1 to open.

[0103] The manual device includes an upper bracket 4 connected to the piston rod 22 and a lower bracket 4 connected to the gate valve 1. An intermediate bracket 6 is provided between the upper bracket 4 and the brackets; the side of the intermediate bracket 6 is connected to the manual wheel 7 through a force transmission component 8.

[0104] Rotating the manual wheel 7 transmits the rotational force to the intermediate bracket 6 via the force transmission component 8. The intermediate bracket 6 converts the rotational force into a force that drives the valve stem 12 to move axially. When the hydraulic system is damaged, the gate valve 1 is opened or closed manually. At this time, the operator rotates the manual wheel 7 to move the lower bracket 4 and the valve stem 12 downward, thereby closing the gate valve 1.

[0105] The force transmission component 8 includes a gear 61 and a rack 62 disposed within the intermediate bracket 6. Both the gear 61 and the rack 62 are equipped with teeth that mesh with each other. When the gear 61 rotates, the teeth transmit torsional force to the rack 62, driving the rack 62 axially. The rack 62 is connected to the valve stem 12. The gear 61 is connected to a gearbox 82, which is connected to the manual wheel 7 via a connecting module 81 and a matching module 71. The connecting module 81 and the matching module 71 are separable and connectable.

[0106] The connecting module 81 is connected to the gearbox 82 , and the matching module 71 is connected to the manual wheel 7 . A fixing pin 88 is provided on the connecting module 81 , and a pin hole is provided on the matching module 71 . The fixing pin 88 can be inserted into the pin hole.

[0107] Example 2

[0108] According to the gate valve electro-hydraulic actuator described in this embodiment, it includes: a gate valve 1, which is arranged on a pipeline 11. When the gate valve 1 is open, the pipeline 11 is connected; when the gate valve 1 is closed, the pipeline 11 is closed.

[0109] The gate valve 1 is connected to the piston mechanism 2 via a valve stem 12 , and the piston mechanism 2 drives the gate valve 1 to open or close.

[0110] The piston mechanism 2 is connected to an accumulator 3 , which can provide hydraulic pressure to the piston mechanism 2 in an emergency state, so that the piston mechanism 2 pushes the gate valve 1 to close urgently.

[0111] The gate valve 1 is also connected to a manual device, which manually drives the gate valve 1 to open or close.

[0112] The piston mechanism 2 includes a piston cylinder 21, within which a piston is disposed. A piston rod 22 is mounted on the piston, which is connected to the valve stem 12. The piston divides the space within the piston cylinder 21 into an upper space 24 and a lower space 25, each of which is connected to an oil tank. The pipeline connecting the upper and lower spaces 24 and 25 in the oil tank is connected to a pumping device, which pumps oil from the oil tank into the piston chamber or back into the oil tank.

[0113] When closing the gate valve 1, the oil in the oil tank is pumped into the upper space 24 of the piston cylinder 21, and the oil in the lower space 25 of the piston cylinder 21 flows back into the oil tank. The piston moves downward under the drive of the hydraulic pressure, thereby driving the valve stem 12 to move downward, and the valve stem 12 drives the gate valve 1 to close. When opening the gate valve 1, the oil in the oil tank is pumped into the lower space 25 of the piston cylinder 21, and the oil in the upper space 24 of the piston cylinder 21 flows back into the oil tank. The piston moves upward under the drive of the hydraulic pressure, thereby driving the valve stem 12 to move upward, and the valve stem 12 drives the gate valve 1 to open.

[0114] The manual device includes an upper bracket 4 connected to the piston rod 22 and a lower bracket 4 connected to the gate valve 1. An intermediate bracket 6 is provided between the upper bracket 4 and the brackets; the side of the intermediate bracket 6 is connected to the manual wheel 7 through a force transmission component 8.

[0115] Rotating the manual wheel 7 transmits the rotational force to the intermediate bracket 6 via the force transmission component 8. The intermediate bracket 6 converts the rotational force into a force that drives the valve stem 12 to move axially. When the hydraulic system is damaged, the gate valve 1 is opened or closed manually. At this time, the operator rotates the manual wheel 7 to move the lower bracket 4 and the valve stem 12 upward or downward, thereby opening or closing the gate valve 1.

[0116] The force transmission component 8 includes a gear 61 and a rack 62 disposed within the intermediate bracket 6. Both the gear 61 and the rack 62 are equipped with teeth that mesh with each other. When the gear 61 rotates, the teeth transmit torsional force to the rack 62, driving the rack 62 axially. The rack 62 is connected to the valve stem 12. The gear 61 is connected to a gearbox 82, which is connected to the manual wheel 7 via a connecting module 81 and a matching module 71. The connecting module 81 and the matching module 71 are separable and connectable.

[0117] The connecting module 81 is connected to the gearbox 82 , and the matching module 71 is connected to the manual wheel 7 . A fixing pin 88 is provided on the connecting module 81 , and a pin hole is provided on the matching module 71 . The fixing pin 88 can be inserted into the pin hole.

[0118] The force transmission component 8 further includes an oil inlet sleeve 84 , and the oil inlet sleeve 84 is connected to the connection module 81 ;

[0119] The emergency pipeline 31 is provided with a handwheel hydraulic pipeline 85 connected to the force transmission component 8, and the handwheel hydraulic pipeline 85 is connected to the oil lubricating sleeve; in emergency cut-off, the hydraulic oil of the accumulator 3 enters the oil inlet lubricating sleeve 84 through the handwheel hydraulic pipeline 85, and then enters the connecting module 81, and drives the connecting module 81 and the supporting module 71 to separate under the action of the pressure of the hydraulic oil.

[0120] The handwheel hydraulic pipeline 85 is located in the branch of the oil pipeline on the upper part of the piston cylinder 21. When it is urgently cut off, the high-pressure hydraulic oil of the accumulator 3 enters the oil inlet sleeve 84 through the handwheel hydraulic pipeline 85, thereby disengaging the groove of the connecting module 81 and the matching module 71, and then disengaging the handwheel.

[0121] In this way, the hand wheel will not rotate with the valve stem 12 when the gate valve 1 is shut off in an emergency, thereby preventing the harm caused by abnormal automatic closing of the valve. If there is no disengagement device, the valve will be shut off unexpectedly in an emergency when a person operates the manual wheel 7, causing the manual wheel 7 to rotate at high speed and injure the human body.

[0122] A connecting module oil chamber 87 is provided in the middle of the connecting module 81 , and a disengagement piston 89 is provided on the connecting module oil chamber 87 . The disengagement piston 89 can cooperate with the support rod in the middle of the matching module 71 .

[0123] After the oil in the oil-inlet sleeve 84 enters the oil chamber 87 of the connection module, it drives the disengagement piston 89 to extend and pushes the matching module 71 to move, so that the fixing pin 88 is separated from the pin hole.

[0124] Example 3

[0125] According to the gate valve electro-hydraulic actuator described in this embodiment, it includes: a gate valve 1, which is arranged on a pipeline 11. When the gate valve 1 is open, the pipeline 11 is connected; when the gate valve 1 is closed, the pipeline 11 is closed.

[0126] The gate valve 1 is connected to the piston mechanism 2 via a valve stem 12 , and the piston mechanism 2 drives the gate valve 1 to open or close.

[0127] The piston mechanism 2 is connected to an accumulator 3 , which can provide hydraulic pressure to the piston mechanism 2 in an emergency state, so that the piston mechanism 2 pushes the gate valve 1 to close urgently.

[0128] The gate valve 1 is also connected to a manual device, which is used to manually drive the gate valve 1 to close.

[0129] The piston mechanism 2 includes a piston cylinder 21, within which a piston 23 is disposed. A piston rod 22 is mounted on the piston 23, which is connected to the valve stem 12. The piston 23 divides the space within the piston cylinder 21 into an upper space 24 and a lower space 25. The upper and lower spaces 24 and 25 are each connected to an oil tank. The pipeline connecting the upper and lower spaces 24 and 25 in the oil tank is connected to a pumping device that pumps oil from the oil tank into the piston chamber or back into the oil tank.

[0130] When closing the gate valve 1, the oil in the oil tank is pumped into the upper space 24 of the piston cylinder 21, and the oil in the lower space 25 of the piston cylinder 21 flows back into the oil tank. The piston moves downward under the drive of the hydraulic pressure, thereby driving the valve stem 12 to move downward, and the valve stem 12 drives the gate valve 1 to close. When opening the gate valve 1, the oil in the oil tank is pumped into the lower space 25 of the piston cylinder 21, and the oil in the upper space 24 of the piston cylinder 21 flows back into the oil tank. The piston moves upward under the drive of the hydraulic pressure, thereby driving the valve stem 12 to move upward, and the valve stem 12 drives the gate valve 1 to open.

[0131] The manual device includes an upper bracket 4 connected to the piston rod 22 and a lower bracket 4 connected to the gate valve 1. An intermediate bracket 6 is provided between the upper bracket 4 and the brackets; the side of the intermediate bracket 6 is connected to the manual wheel 7 through a force transmission component 8.

[0132] Rotating the manual wheel 7 transmits the rotational force to the intermediate bracket 6 via the force transmission component 8. The intermediate bracket 6 converts the rotational force into a force that drives the valve stem 12 to move axially. When the hydraulic system is damaged, the gate valve 1 is opened or closed manually. At this time, the operator rotates the manual wheel 7 to move the lower bracket 4 and the valve stem 12 upward or downward, thereby opening or closing the gate valve 1.

[0133] The force transmission component 8 includes a gear 61 and a rack 62 disposed within the intermediate bracket 6. Both the gear 61 and the rack 62 are equipped with teeth that mesh with each other. When the gear 61 rotates, the teeth transmit torsional force to the rack 62, driving the rack 62 axially. The rack 62 is connected to the valve stem 12. The gear 61 is connected to a gearbox 82, which is connected to the manual wheel 7 via a connecting module 81 and a matching module 71. The connecting module 81 and the matching module 71 are separable and connectable.

[0134] A support bracket 63 is provided inside the intermediate bracket 6 ; one side of the rack 62 is provided with teeth and meshes with the gear 61 ; the other side is supported by the support bracket 63 .

[0135] The support bracket 63 is arranged opposite to the roller, the roller is arranged on one side of the rack 62 with teeth, and the support bracket 63 is arranged on the other side, and the two tighten the rack 62. The support bracket 63 can be a roller structure, and the support bracket 63 can roll on the rack 62 when the rack 62 moves.

[0136] Example 4

[0137] This embodiment makes the following improvements on the basis of embodiment 3:

[0138] A support bracket 63 is provided inside the intermediate bracket 6 ; one side of the rack 62 is provided with teeth and meshes with the gear 61 ; the other side is supported by the support bracket 63 .

[0139] The support bracket 63 is arranged opposite to the roller, the roller is arranged on one side of the rack 62 with teeth, and the support bracket 63 is arranged on the other side, and the two tighten the rack 62. The support bracket 63 is a smooth arc structure, and the side of the support bracket 63 without the rack 62 is a smooth surface, and the support bracket 63 and the rack 62 slide relative to each other.

[0140] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should extend to equivalent substitutions of these features understood by those skilled in the relevant art. It should also be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting.

[0141] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0142] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0143] Certain terms are used throughout this specification to refer to specific system components. As those skilled in the art will appreciate, different names can often be used to refer to the same component, and thus this specification does not intend to distinguish between components that differ only in name, not function. References in this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment" or "an embodiment" appearing in various places throughout this specification do not necessarily refer to the same embodiment.

[0144] The embodiments of the present invention are presented for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application and to enable those skilled in the art to understand the invention and design various embodiments with various modifications as suited for specific applications.

[0145] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and / or modifications that fall within the scope of the present invention, and changes and / or modifications made in accordance with the embodiments of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A gate valve electro-hydraulic actuator, characterized in that: include: A gate valve (1), the gate valve (1) being arranged on the pipeline (11) and controlling the opening or closing of the pipeline (11); a piston mechanism (2) connected to the gate valve (1), the piston mechanism (2) driving the gate valve (1) to open or close via a valve stem (12); the piston mechanism (2) comprising a piston cylinder (21) and a piston (23) disposed in the piston cylinder (21), the piston (23) being provided with a piston rod (22) connected to the valve stem (12); the piston (23) dividing the space in the piston cylinder (21) into an upper space (24) and a lower space (25), the upper space (24) and the lower space (25) being respectively connected to an oil tank; and an accumulator (3) connected to the piston mechanism (2), wherein the accumulator (3) is configured to provide hydraulic pressure to the piston mechanism (2) in an emergency state, and enable the piston mechanism (2) to push the gate valve (1) to close urgently; The gate valve (1) is further connected to a manual device, and the manual device manually drives the gate valve (1) to open or close; The accumulator (3) is connected to the upper space (24) of the piston mechanism (2) via an emergency pipeline (31). In a normal state, the emergency pipeline (31) is closed. When the gate valve (1) needs to be shut off urgently, the emergency pipeline (31) is opened, and the oil in the accumulator (3) enters the upper space (24), pushing the piston to move downward, thereby closing the gate valve (1). The manual device comprises an upper bracket (4) connected to a piston rod (22) and a lower bracket (4) connected to a valve stem (12) of the gate valve (1), an intermediate bracket (6) being provided between the upper bracket (4) and the brackets; a side surface of the intermediate bracket (6) is connected to a manual wheel (7) via a force transmission component (8); The force transmission component (8) includes a gear (61) disposed in the intermediate bracket (6), and a rack (62) cooperating with the gear (61); The rack (62) is connected to the valve stem (12); the gear (61) is connected to a gearbox (82), and the gearbox (82) is connected to the manual wheel (7) via a connecting module (81) and a matching module (71); the connecting module (81) and the matching module (71) can be separated or connected; The connecting module (81) is connected to the gearbox (82), the matching module (71) is connected to the manual wheel (7), the connecting module (81) is provided with a fixing pin (88), the matching module (71) is provided with a pin hole, and the fixing pin (88) can be inserted into the pin hole; When the gate valve (1) is manually closed by the manual wheel (7), the manual wheel (7) is first pushed inward to connect the connecting module (81) with the matching module (71), and the manual wheel (7) is rotated in a first direction to drive the gear (61) to rotate through the gearbox (82), and the gear (61) drives the rack (62) to move downward, thereby closing the gate valve (1), and then the manual wheel (7) is pulled out to separate the connecting module (81) from the matching module (71); When the gate valve (1) is opened manually by the manual wheel (7), the manual wheel (7) is first pushed inward to connect the connecting module (81) with the matching module (71), and the manual wheel (7) is rotated in the second direction to drive the gear (61) to rotate through the gearbox (82), and the gear (61) drives the rack (62) to move upward, thereby opening the gate valve (1), and then the manual wheel (7) is pulled out to separate the connecting module (81) from the matching module (71); The force transmission component (8) further includes an oil inlet sleeve (84), and the oil inlet sleeve (84) is connected to the connection module (81); The emergency pipeline (31) is provided with a handwheel hydraulic pipeline (85) connected to the force transmission component (8), and the handwheel hydraulic pipeline (85) is connected to the oil lubricating sleeve; when the emergency is cut off, the hydraulic oil of the accumulator (3) enters the oil inlet lubricating sleeve (84) through the handwheel hydraulic pipeline (85), and then enters the connecting module (81), and the connecting module (81) and the matching module (71) are driven to separate under the pressure of the hydraulic oil.

2. The gate valve electro-hydraulic actuator according to claim 1, characterized in that: A connecting module oil chamber (87) is provided in the middle of the connecting module (81), a disengagement piston (89) is provided on the connecting module oil chamber (87), and the disengagement piston (89) cooperates with a support rod in the middle of the matching module (71); After the oil in the oil-inlet sleeve (84) enters the oil chamber (87) of the connection module, it drives the disengagement piston (89) to extend and pushes the matching module (71) to move, so that the fixing pin (88) and the pin hole are separated.

3. The gate valve electro-hydraulic actuator according to claim 2, characterized in that: A fixing flange (83) is provided on the outside of the connection module (81) and the oil inlet sleeve (84), and the fixing flange (83) is connected to the gearbox (82).

4. The gate valve electro-hydraulic actuator according to claim 3, characterized in that: A supporting bracket (63) is provided inside the intermediate bracket (6); One side of the rack (62) is provided with teeth and meshes with the gear (61); the other side is supported by the support bracket (63).

5. The gate valve electro-hydraulic actuator according to claim 4, characterized in that: The lower end of the rack (62) is connected to the valve stem (12) via a threaded sleeve (64).

6. The gate valve electro-hydraulic actuator according to claim 5, characterized in that: A position indicating nut (72) is provided in the middle of the manual wheel (7).

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