CN212455703U

CN212455703U - Hydraulic safety valve actuator

Info

Publication number: CN212455703U
Application number: CN202020548918.0U
Authority: CN
Inventors: 蒋理彬
Original assignee: Sichuan Daoqin Petroleum Equipment Co ltd
Current assignee: Sichuan Daoqin Petroleum Equipment Co ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2021-02-02
Anticipated expiration: 2030-04-14

Abstract

The utility model discloses a hydraulic safety valve actuator, which comprises a cylinder cover, a cylinder body and a base, wherein the cylinder body comprises an inner cylinder body and an outer cylinder body, a piston matched with the inner cylinder body is arranged in the inner cylinder body, a hydraulic cylinder is formed above the piston, the inner cylinder body and the cylinder cover, and a liquid inlet and a safety valve are arranged on the hydraulic cylinder; the piston is connected with a valve rod penetrating out of the base and a piston rod penetrating out of the cylinder cover, and a reset device is arranged below the piston. The utility model discloses an executor simple structure, sealed reliable, easy and simple to handle, low cost of maintenance, and can shorten the length of executor, further promote the speed of switching gate valve.

Description

Hydraulic safety valve actuator

Technical Field

The utility model relates to a relief valve executor, concretely relates to relief valve executor surges.

Background

The safety valve is a special valve, wherein the opening and closing part is in a normally closed state under the action of external force, and when the pressure of a medium in equipment or a pipeline rises to exceed a specified value, the medium is discharged to the outside of the system to prevent the pressure of the medium in the pipeline or the equipment from exceeding the specified value. The safety valve mainly includes pneumatic safety valve and relief valve that surges, and wherein the relief valve that surges mainly includes valve part and execution part, and liquid comes in from executor upper portion during the use, produces pressure and drives piston downstream drive valve rod, and threaded connection is used to valve rod and valve plate, thereby valve rod drives the valve plate downstream together when the downstream drives the valve plate and opens the valve, when the upper portion executor releases the water pressure the pressure, drives the valve rod upward movement through the spring, thereby drives the valve plate upward movement together and closes the valve.

However, the existing hydraulic safety valve actuator still has certain defects in the use process, for example, most hydraulic cylinders are independently arranged above a cylinder cover, so that the volume length of the actuator is too long, and the inconvenience of operation control and maintenance is caused; the piston is directly arranged in the cylinder body, and the cylinder body is directly divided into an upper part and a lower part, so that the requirement on the sealing property of the cylinder body is high, and meanwhile, insufficient hydraulic supply is easily caused, and the opening and closing of a valve cannot be controlled in time; the huge stretching force generated when the heavy spring is compressed is easy to damage the bottoms of the piston and the actuator, and the working efficiency is influenced; a single actuator cannot be matched with gate valves of various specifications and models for use; the gate valve is in a strong corrosion environment for a long time and is extremely easy to damage, and a sealing element in the gate valve is short in service life and high in cost, so that the gate valve is not beneficial to popularization and application.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in view of the above problems, the present invention provides an actuator for a hydraulic safety valve, which has a simple structure, reliable sealing, easy maintenance, and low cost, and can shorten the length of the actuator, thereby further increasing the speed of opening and closing the gate valve.

The utility model adopts the technical scheme as follows:

the utility model discloses a hydraulic relief valve actuator, including cylinder cap, cylinder body and base, the cylinder body includes inner cylinder body and outer cylinder body, be provided with the piston rather than matching in the inner cylinder body, the piston top forms the pneumatic cylinder with inner cylinder body and cylinder cap, is provided with inlet and relief valve on this pneumatic cylinder; the piston is connected with a valve rod penetrating out of the base and a piston rod penetrating out of the cylinder cover, and a reset device is arranged below the piston.

Due to the adoption of the structure, the cylinder body is divided into the inner cylinder body and the outer cylinder body by adopting the arrangement of the inner layer and the outer layer, the hydraulic cylinder is further arranged in the inner cylinder body, the airtightness of the cylinder body is ensured, the liquid is prevented from flowing into the outer cylinder body to influence the performance of equipment, meanwhile, the radius of the inner cylinder body is smaller relative to that of the outer cylinder body, the liquid is further compressed under the condition of the same length, the generated pressure is higher, the speed of pushing the piston to move can be further increased, and the gate valve is ensured to be opened quickly; when the gate valve needs to be closed, the resetting device resets to push the piston to move upwards, and liquid is quickly discharged due to the pushing of the piston and the pressure action of the liquid, so that the gate valve is quickly closed.

Further, resetting means presses seat and spring including pressing a nut, spring, presses the seat nut to be fixed in the bottom of piston, press a nut and spring to press the seat linkage to be connected, press a nut below to be fixed with the valve rod of wearing out the base, the spring housing is outside the valve rod, and the spring is restricted between spring pressure seat and base.

By adopting the structure, the spring pressing seat is directly contacted with the spring, so that the direct contact between the spring and the piston is avoided, the damage caused by the direct contact between the piston and the spring is avoided, the service life of the piston is further ensured, the spring can be protected, and the maintenance cost is reduced.

Furthermore, the bottom of the inner cylinder body is provided with a pressing sleeve, the outer ring of the pressing seat nut is pressed on the pressing sleeve, the outer ring of the pressing sleeve is fixedly provided with a transition sleeve, the transition sleeve is sleeved on the outer side of the inner cylinder body, and the top end of the transition sleeve is fixedly connected with the spring pressing seat.

Furthermore, a protective cover is arranged at the top of the cylinder cover, and the piston rod extends into the protective cover.

Further, be provided with spring base on the base, spring base and detachable the being connected of base.

Furthermore, the spring base is of a hollow circular truncated cone structure, and the radius of the spring base is larger than that of the spring.

Due to the adoption of the structure, the spring base is arranged, so that the spring is prevented from directly contacting with the base, and the base and the spring are further protected.

Furthermore, the pressing seat nut is sleeved with an adjusting threaded sleeve, and a screw is arranged on the adjusting threaded sleeve.

Further, the piston rod is connected to the piston through a flange, and the edge of the piston is provided with a 0-shaped ring.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the hydraulic safety valve actuator of the utility model adopts the arrangement of the inner layer and the outer layer, which is divided into the inner cylinder body and the outer cylinder body, further arranges the hydraulic cylinder in the inner cylinder body, thereby ensuring the sealing of the cylinder body, avoiding the liquid from flowing into the outer cylinder body to influence the performance of the equipment, simultaneously, the radius of the inner cylinder body is smaller relative to the outer cylinder body, under the condition of the same length, the liquid is further compressed, the pressure generated by the hydraulic safety valve actuator is larger, further improving the speed of pushing the piston to move, and ensuring the quick opening of the gate valve; when the gate valve needs to be closed, the resetting device resets to push the piston to move upwards, and liquid is quickly discharged due to the pushing of the piston and the pressure action of the liquid, so that the gate valve is quickly closed.

2. The spring base can avoid the injury of spring to the base, and can buffer spring's power, avoids the spring bottom to damage, has further protected spring and base.

Drawings

Fig. 1 is a schematic diagram of a hydraulic relief valve actuator according to the present invention;

the labels in the figure are: 1-base, 2-big spring, 3-small spring, 4-adjusting screw sleeve, 5-pressing base nut, 6-inner cylinder body, 7-spring pressing base, 8-flange, 9-full thread hexagon head bolt, 10-liquid inlet, 11-sealing ring, 12-shield, 13-spring base, 14-valve rod, 15-inner hexagon cone fastening bolt, 16-outer cylinder body, 17-pressing sleeve, 18-piston, 19-piston rod, 20-cylinder cover and 21-safety valve.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, the utility model discloses a relief valve executor surges, including cylinder cap 20, cylinder body and base 1, the cylinder body includes inner cylinder body 6 and outer cylinder body 16, be provided with in the inner cylinder body 6 with its matched piston 18, the top of piston 18 forms the pneumatic cylinder with inner cylinder body 6 and cylinder cap 20, is provided with inlet 10 and relief valve 21 on this pneumatic cylinder, and the inlet can be used for supplying liquid to the pneumatic cylinder in, in order to drive the piston removal, and the relief valve is used for guaranteeing that discharge liquid relieves pressure or directly discharges liquid when the pneumatic cylinder hydraulic pressure is too high; the piston 18 is connected with a valve rod 14 penetrating through the base 1 and a piston rod 19 penetrating through the cylinder cover 20, the valve rod 14 is connected with the gate valve, so that the effect of controlling the opening and closing of the gate valve can be achieved by controlling the valve rod, the piston rod can guide the piston to move, the piston is guaranteed to move in the correct direction, and the inner cylinder body and the piston are prevented from being abraded due to deviation; the top of cylinder cap 20 is provided with guard shield 12, piston rod 19 is deep in guard shield 12, and the guard shield can protect the piston rod, avoids the dust to get into and causes the influence to piston rod and cylinder body inside, piston 18 below is provided with resetting means.

Because most of the existing safety valve actuators are provided with hydraulic cylinders above cylinder covers, the volume length of the actuators is too long, and the inconvenience of operation control and maintenance is caused; the piston is directly arranged in the cylinder body, and the cylinder body is directly divided into an upper part and a lower part, so that the requirement on the sealing property of the cylinder body is high, insufficient hydraulic supply is easily caused, and the valve cannot be controlled to be opened and closed in time. Therefore, in order to shorten the length of the actuator, the maintenance is convenient, the sealing performance of the hydraulic cylinder is ensured, the hydraulic cylinder is not arranged above the cylinder cover, but is directly arranged inside the cylinder body, the cylinder body is arranged in an inner layer and an outer layer, and is divided into an inner cylinder body and an outer cylinder body, the hydraulic cylinder is further arranged in the inner cylinder body, the sealing performance of the cylinder body is ensured, the liquid is prevented from flowing into the outer cylinder body to influence the performance of equipment, meanwhile, the radius of the inner cylinder body is smaller relative to the outer cylinder body, the liquid is further compressed under the condition of the same length, the pressure generated by the liquid is larger, the speed of pushing the piston to move can be further increased, and the gate valve is; when the gate valve needs to be closed, the resetting device resets to push the piston to move upwards, and liquid is quickly discharged due to the pushing of the piston and the pressure action of the liquid, so that the gate valve is quickly closed.

In a preferred embodiment, the resetting device comprises a pressing seat nut 5, a spring pressing seat 7 and a spring, the pressing seat nut 5 is fixed at the bottom of the piston 18, the pressing seat nut 5 is in linkage connection with the spring pressing seat 7, so that the spring pressing seat 7 can be driven to move when the pressing seat nut 5 moves, a valve rod 14 penetrating out of the base 1 is fixed below the pressing seat nut 5, the valve rod 14 is in threaded connection with the pressing seat nut 5, the valve rod 14 can move along with the piston, and the piston can be guided to move by matching between the valve rod 14 and the base 1. The spring is sleeved outside the valve rod 14 and is limited between the spring pressing seat 7 and the base 1, so that the piston can always keep the upward movement trend under the action of the spring force. Meanwhile, the spring pressing seat is directly contacted with the spring, so that the spring is prevented from being directly contacted with the piston, the piston is prevented from being directly contacted with the spring to cause damage, the service life of the piston is further ensured, the spring can be protected, and the maintenance cost is reduced.

Further, in order to realize linkage connection between the seat pressing nut 5 and the spring pressing seat 7 and ensure that the spring pressing seat 7 can move synchronously along with the movement of the seat pressing nut 5, the bottom of the inner cylinder body is provided with a pressing sleeve 17, the outer ring of the seat pressing nut 5 is pressed on the pressing sleeve 17, the outer ring of the pressing sleeve 17 is fixed with a transition sleeve, the transition sleeve is sleeved outside the inner cylinder body, the top end of the transition sleeve is fixedly connected with the spring pressing seat, so that when the liquid pushes the piston to move downwards, the piston pushes the seat pressing nut 5 to move downwards, the seat pressing nut 5 links the pressing sleeve 17, the pressing sleeve 17 drives the transition sleeve to move, the transition sleeve drives the spring pressing seat 7 to move downwards to compress the spring, in order to reduce the friction resistance between the transition sleeve and the outer side of the inner cylinder body, the transition sleeve is also provided with a steel ball between the outer sides of the inner cylinder body, and realizes the movement of the spring pressing seat through the, the loss of force caused by linkage is reduced.

In order to further guarantee the quick closing of gate valve, the valve rod overcoat is equipped with two springs, including big spring 2 and little spring 3, big spring 2 is located between spring pressure seat 7 and the base 1, little spring 3 fixed connection is on base 1, when big spring is compressed, the gate valve is opened, because hydraulic effect, resetting means can continue to keep down trend of motion, can compress little spring 3 promptly, when beginning the pressure release, big spring release pressure together, can produce huge thrust in an instant, thereby promote piston 18 and drive valve rod 14 and move up fast to the quick valve that closes. Simultaneously, in order to avoid 3 contact valve rods of little spring, cause wearing and tearing for the valve rod, be provided with the lag between little spring and the valve rod, the lag cover is established on the valve rod.

Because the spring can contact base 1 by the compression in-process, can cause certain damage to the base for a long time, also can cause wearing and tearing to the spring, consequently, in order to protect base and spring, be provided with spring base 13 on the base 1, spring base 13 is connected with base 1 is detachable, is convenient for take off the maintenance, and spring base 13 is hollow round platform structure, and its radius is greater than the radius of big spring to big or small spring homoenergetic can be compressed and fall in spring base's within range.

Preferably, the adjusting threaded sleeve 4 is sleeved outside the pressure seat nut 5, a screw is arranged on the adjusting threaded sleeve 4, and the adjusting threaded sleeve 4 can limit the downward travel of the piston 18, so that the moving distance of the whole valve rod 14 is limited, the distance can be adjusted according to different types of gate valves, and the pressure seat nut is suitable for different types of gate valves; the piston rod 19 is connected to the piston 18 through the flange 8, and the edge of the piston 18 is provided with the 0-shaped ring, so that the sealing performance of the hydraulic cylinder is further ensured, the service life of the piston is prolonged, and the maintenance cost is reduced.

It is right above the utility model provides a hydraulic safety valve executor has carried out detailed introduction.

The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to aid in understanding the methods and their core concepts. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A hydraulic safety valve actuator comprises a cylinder cover (20), a cylinder body and a base (1), and is characterized in that the cylinder body comprises an inner cylinder body (6) and an outer cylinder body (16), a piston (18) matched with the inner cylinder body is arranged in the inner cylinder body (6), a hydraulic cylinder is formed above the piston (18) and the inner cylinder body (6) and the cylinder cover (20), and a liquid inlet (10) and a safety valve (21) are arranged on the hydraulic cylinder; the piston (18) is connected with a valve rod (14) penetrating through the base (1) and a piston rod (19) penetrating through the cylinder cover (20), and a resetting device is arranged below the piston (18).

2. A hydraulic safety valve actuator according to claim 1, wherein the resetting device comprises a seat pressing nut (5), a spring seat (7) and a spring, the seat pressing nut (5) is fixed at the bottom of the piston (18), the seat pressing nut (5) is linked with the spring seat (7), a valve rod (14) penetrating through the base (1) is fixed below the seat pressing nut (5), the spring is sleeved outside the valve rod (14), and the spring is limited between the spring seat (7) and the base (1).

3. The hydraulic safety valve actuator according to claim 2, wherein the bottom of the inner cylinder body is provided with a pressing sleeve (17), the outer ring of the pressing seat nut (5) presses on the pressing sleeve (17), the outer ring of the pressing sleeve (17) is fixed with a transition sleeve, the transition sleeve is arranged on the outer side of the inner cylinder body, and the top end of the transition sleeve is fixedly connected with the spring pressing seat (7).

4. A hydraulic safety valve actuator according to claim 1, characterized in that the top of the cylinder head (20) is provided with a shield (12), the piston rod (19) penetrating into the shield (12).

5. A hydraulic safety valve actuator according to claim 1, characterized in that the base (1) is provided with a spring base (13), and the spring base (13) is detachably connected with the base (1).

6. A hydraulic relief valve actuator according to claim 5, characterized in that the spring seat (13) is a hollow circular truncated cone with a radius larger than the radius of the spring.

7. A hydraulic safety valve actuator according to claim 2, wherein the seat nut (5) is externally sleeved with an adjusting screw sleeve (4), and the adjusting screw sleeve (4) is provided with a screw.

8. A hydraulic relief valve actuator according to claim 6 or 7, characterized in that the piston rod (19) is connected to the piston (18) by means of a flange (8), the piston (18) being provided with a 0-ring at its edge.