Electro-hydraulic actuating mechanism of valve

Abstract

The utility model relates to the technical field of valves, in particular to a valve electro-hydraulic actuating mechanism which can filter out impurities in hydraulic oil, prevents the impurities in the hydraulic oil from blocking a pipeline, improves reliability and is high in practicability. Comprising a cylinder body, a push rod and a flashboard, a cavity is formed in the cylinder body, a piston is vertically slidably mounted in the cavity of the cylinder body, the upper end of the push rod is fixedly connected with the piston, the push rod is vertically slidably mounted on the cylinder body, and the flashboard is fixedly mounted at the lower end of the push rod; the hydraulic cylinder further comprises a conveying mechanism and a filtering mechanism, the conveying mechanism communicates with the cavity of the cylinder body, the conveying mechanism is used for conveying hydraulic oil to the cavity of the cylinder body so as to control the piston to ascend and descend, and the filtering mechanism is arranged on the conveying mechanism and has a filtering function.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of valve, in particular to a valve electro-hydraulic actuator. BACKGROUND

[0002] The gate valve is a kind of device for controlling the flow of liquid in pipeline, and it has wide application in the field of chemical industry and pharmacy.For some large-scale gate valves, in order to facilitate the control of opening and closing of the gate valve, hydraulic device is installed on the gate valve, and the lifting of the gate plate in the gate valve is automatically controlled by the hydraulic device, thereby realizing the control of opening and closing of the gate valve.In the prior art, the utility model patent with the patent application number 202021236247.0 discloses a kind of hydraulic gate valve, which is mainly composed of oil cylinder, gate plate and valve body etc., and when using, the opening and closing of valve body is controlled by the lifting of gate plate driven by oil cylinder;However, there are the following problems in the process of using, when controlling the lifting of gate plate, power is provided by the delivery of hydraulic oil in oil cylinder, and some solid impurities such as metal chips or sludge etc.will inevitably mix into hydraulic oil in the process of long-term use, which not only may cause the blockage of pipeline system in oil cylinder, but also will affect the fluidity of hydraulic oil, and affect the normal use of oil cylinder, so a kind of hydraulic device with automatic cleaning of solid impurities in hydraulic oil is needed. UTILITY MODEL CONTENTS

[0003] To solve the above technical problems, the utility model provides a kind of valve electro-hydraulic actuator, which can filter out impurities in hydraulic oil, avoid the blockage of pipeline caused by impurities in hydraulic oil, improve reliability and practicability.

[0004] The valve electro-hydraulic actuator of the utility model comprises a cylinder body, a push rod and a gate plate, a chamber is arranged in the cylinder body, a piston is slidably installed in the chamber of the cylinder body, the upper end of the push rod is fixedly connected with the piston, the push rod is slidably installed on the cylinder body, and the gate plate is fixedly installed on the lower end of the push rod;It also comprises a conveying mechanism and a filtering mechanism, the conveying mechanism is communicated with the chamber of the cylinder body, the conveying mechanism is used for conveying hydraulic oil to the chamber of the cylinder body, thereby controlling the lifting of the piston, the filtering mechanism is arranged on the conveying mechanism, and the filtering mechanism has filtering function;The cylinder body is fixedly installed on the support outside, and the gate plate is installed in the gate valve;When controlling the opening and closing of the gate valve, open the conveying mechanism, control the lifting of the piston by conveying the hydraulic oil in the chamber of the cylinder body, then control the lifting of the gate plate by the push rod, and then control the opening and closing of the gate valve, while the conveying mechanism conveys hydraulic oil, the filtering mechanism filters out solid impurities in hydraulic oil, avoids the blockage caused by solid impurities entering the chamber of the cylinder body through hydraulic oil, ensures the normal use of hydraulic oil, is convenient to use, and has high practicability.

[0005] Preferably, the conveying mechanism comprises an oil tank, an electric oil pump, an oil conveying pipe, a conveying pipe, an oil inlet pipe A, an oil inlet pipe B and an oil discharging mechanism, the oil tank is provided with a cavity, the input end of the electric oil pump is communicated with the cavity of the oil tank through the oil conveying pipe, the output end of the electric oil pump is communicated with the conveying pipe, the oil inlet pipe A and the oil inlet pipe B are both communicated with the conveying pipe, the oil inlet pipe A and the oil inlet pipe B are both provided with valves, the output ends of the oil inlet pipe A and the oil inlet pipe B are respectively communicated with the lower part and the upper part of the cylinder chamber, the oil discharging mechanism is communicated with the cylinder chamber, the output end of the oil discharging mechanism is communicated with the oil tank through a filtering mechanism; when the push rod is lifted, the valve on the oil inlet pipe B is closed, the electric oil pump is opened, the hydraulic oil in the oil tank enters the lower part of the cylinder chamber through the oil conveying pipe, the electric oil pump, the conveying pipe and the oil inlet pipe A in turn, and then pushes the piston to rise, at the same time, the hydraulic oil in the upper part of the cylinder chamber is discharged into the filtering mechanism through the oil discharging mechanism; when the piston is lowered, the valve on the oil inlet pipe A is closed, the valve on the oil inlet pipe B is opened, the hydraulic oil enters the upper part of the cylinder chamber through the oil inlet pipe B, and then pushes the piston to descend, at the same time, the hydraulic oil below the piston is discharged through the oil discharging mechanism; which facilitates the conveying of the hydraulic oil.

[0006] Preferably, the oil discharging mechanism comprises an oil discharging pipe A and an oil discharging pipe B, the oil discharging pipe A and the oil discharging pipe B are respectively communicated with the upper part and the lower part of the cylinder chamber, the output ends of the oil discharging pipe A and the oil discharging pipe B are both communicated with the filtering mechanism, and the oil discharging pipe A and the oil discharging pipe B are both provided with valves; when the piston is lifted, the valve on the oil discharging pipe B is closed, and the valve on the oil discharging pipe A is opened; when the piston is lowered, the valve on the oil discharging pipe A is closed, and the valve on the oil discharging pipe B is opened.

[0007] Preferably, the filtering mechanism comprises a cylinder, a support frame, a discharging pipe, a filter cartridge and a support pipe, the cylinder is provided with an oil cavity, the cylinder is fixedly installed on the upper end of the oil tank through the support frame, the output end of the discharging pipe is communicated with the oil cavity of the cylinder, the oil discharging pipe A and the oil discharging pipe B are both communicated with the discharging pipe, the filter cartridge is fixedly installed on the upper end of the support pipe, the support pipe is rotatably installed on the oil tank and the cylinder, the filter cartridge is provided with a discharging cavity, a plurality of filter holes which are communicated with the discharging cavity are arranged on the side wall of the filter cartridge, the upper end of the support pipe is communicated with the discharging cavity, the support pipe is provided with a valve, and the lower end of the support pipe is communicated with the oil tank; in use, the oil discharged by the oil discharging mechanism enters the cylinder through the discharging pipe, then the oil in the cylinder enters the discharging cavity of the filter cartridge after being filtered through the filter holes on the filter cartridge, and then the oil in the filter cartridge enters the oil tank through the support pipe; the filtering of the hydraulic oil by the filter cartridge reduces the impurities in the hydraulic oil, is convenient to use and has high practicability.

[0008] Preferably, the brush is installed in the cylinder, and the brush is in close contact with the outer wall of the filter cartridge; the rotating mechanism is installed on the cylinder and the filter cartridge, and is used for rotating the filter cartridge; when the filter cartridge needs to be cleaned, the filter cartridge and the hydraulic oil in the cylinder are emptied, the rotating mechanism is opened, the filter cartridge is rotated, the filter cartridge is in uniform contact with the brush in the rotating process, and solid impurities on the outer wall of the filter cartridge are cleaned by the brush.

[0009] Preferably, the rotating mechanism comprises a motor and a rotating shaft; the motor is fixedly installed on the upper end of the cylinder; the rotating shaft is rotatably installed on the cylinder; the lower end of the rotating shaft is connected with the filter cartridge; the upper end of the rotating shaft is connected with the output end of the motor; and the rotating shaft is coaxial with the supporting pipe; when the filter cartridge is rotated, the motor is opened, the filter cartridge is rotated by the rotating shaft, and the rotation of the filter cartridge is facilitated.

[0010] Preferably, the cylinder is provided with a blowdown opening communicated with the oil cavity, and the sealing cover is installed on the outer side of the blowdown opening by bolts; when the brush cleans the filter cartridge, the impurities falling from the brush are above the sealing cover; when the impurities are cleaned, the sealing cover is dismounted from the cylinder, and then the impurities are cleaned, so that convenience is improved.

[0011] Compared with the prior art, the hydraulic oil in the hydraulic oil can be filtered out, the impurities in the hydraulic oil can be prevented from causing blockage of the pipeline, the reliability is improved, and the practicability is high. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic view of a cylinder, a push rod and a gate plate;

[0013] Figure 2 is a structural schematic view of a motor, a rotating shaft and a filter cartridge;

[0014] Figure 3 is a sectional view of a conveying mechanism;

[0015] Figure 4 is a structural schematic view of a filtering mechanism;

[0016] Figure 5 is a structural schematic view of a cylinder, a piston and a push rod.

[0017] In the drawings, 1 is a cylinder; 2 is a push rod; 3 is a gate plate; 4 is a piston; 5 is an oil tank; 6 is an electric oil pump; 7 is an oil conveying pipe; 8 is a conveying pipe; 9 is an oil inlet pipe A; 10 is an oil inlet pipe B; 11 is an oil outlet pipe A; 12 is an oil outlet pipe B; 13 is a cylinder; 14 is a supporting frame; 15 is a discharge pipe; 16 is a filter cartridge; 17 is a supporting pipe; 18 is a brush; 19 is a motor; 20 is a rotating shaft; and 21 is a sealing cover. DETAILED DESCRIPTION

[0018] For the purpose of facilitating the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0019] Embodiment 1

[0020] As Figures 1 to 5 , the valve electro-hydraulic actuator comprises a cylinder body 1, a push rod 2, a gate plate 3, a conveying mechanism and a filtering mechanism, the cylinder body 1 is provided with a cavity, a piston 4 is slidably installed in the cavity of the cylinder body 1, the upper end of the push rod 2 is fixedly connected with the piston 4, the push rod 2 is slidably installed on the cylinder body 1, the gate plate 3 is fixedly installed at the lower end of the push rod 2, the conveying mechanism is communicated with the cavity of the cylinder body 1, the conveying mechanism is used for conveying hydraulic oil to the cavity of the cylinder body 1, thereby controlling the lifting of the piston 4, the filtering mechanism is provided on the conveying mechanism and has a filtering function; the cylinder body 1 is fixedly installed on a support outside, the gate plate 3 is installed in a gate valve; when the opening and closing of the gate valve is controlled, the conveying mechanism is opened, the lifting of the piston 4 is controlled by conveying the hydraulic oil in the cavity of the cylinder body 1, thereby the lifting of the gate plate 3 is controlled by the push rod 2, thereby the opening and closing of the gate valve is controlled, at the same time, when the conveying mechanism conveys the hydraulic oil, the filtering mechanism filters out the solid impurities in the hydraulic oil, avoiding the solid impurities entering into the cavity of the cylinder body 1 through the hydraulic oil to cause blockage, ensuring the normal use of the hydraulic oil, being convenient to use and high in practicability.

[0021] As Figure 3 , the conveying mechanism comprises an oil tank 5, an electric oil pump 6, an oil conveying pipe 7, a conveying pipe 8, an oil inlet pipe A 9, an oil inlet pipe B 10 and an oil discharging mechanism, the oil tank 5 is provided with a cavity, the input end of the electric oil pump 6 is communicated with the cavity of the oil tank 5 through the oil conveying pipe 7, the output end of the electric oil pump 6 is communicated with the conveying pipe 8, the oil inlet pipe A 9 and the oil inlet pipe B 10 are both communicated with the conveying pipe 8, the oil inlet pipe A 9 and the oil inlet pipe B 10 are both provided with valves, the output ends of the oil inlet pipe A 9 and the oil inlet pipe B 10 are respectively communicated with the lower part and the upper part of the cavity of the cylinder body 1, the oil discharging mechanism is communicated with the cavity of the cylinder body 1, the output end of the oil discharging mechanism is communicated with the oil tank 5 through the filtering mechanism; when the push rod 2 is lifted, the valve on the oil inlet pipe B 10 is closed, the electric oil pump 6 is opened, the hydraulic oil in the oil tank 5 enters into the lower part of the cavity of the cylinder body 1 through the oil conveying pipe 7, the electric oil pump 6, the conveying pipe 8 and the oil inlet pipe A 9 in turn, thereby pushing the piston 4 to lift, at the same time, the hydraulic oil in the upper part of the cavity of the cylinder body 1 is discharged into the filtering mechanism through the oil discharging mechanism; when the piston 4 is lowered, the valve on the oil inlet pipe A 9 is closed, the valve on the oil inlet pipe B 10 is opened, the hydraulic oil enters into the upper part of the cavity of the cylinder body 1 through the oil inlet pipe B 10, thereby pushing the piston 4 to lower, at the same time, the hydraulic oil below the piston 4 is discharged through the oil discharging mechanism; the conveying of the hydraulic oil is facilitated.

[0022] As Figure 5 , the oil discharge mechanism includes oil discharge pipe A11 and oil discharge pipe B12, oil discharge pipe A11 and oil discharge pipe B12 are communicated with the upper and lower parts of the cylinder 1 chamber, the output end of the oil discharge pipe A11 and the oil discharge pipe B12 are communicated with the filter mechanism, the valve is arranged on the oil discharge pipe A11 and the oil discharge pipe B12; when the piston 4 rises, the valve on the oil discharge pipe B12 is closed, the valve on the oil discharge pipe A11 is opened; when the piston 4 falls, the valve on the oil discharge pipe A11 is closed, the valve on the oil discharge pipe B12 is opened.

[0023] As Figure 4 , the filter mechanism includes cylinder 13, support frame 14, discharge pipe 15, filter cartridge 16 and support pipe 17, the oil cavity is arranged in the cylinder 13, the cylinder 13 is fixedly installed on the upper end of the oil tank 5 through the support frame 14, the output end of the discharge pipe 15 is communicated with the oil cavity of the cylinder 13, the oil discharge pipe A11 and the oil discharge pipe B12 are communicated with the discharge pipe 15, the filter cartridge 16 is fixedly installed on the upper end of the support pipe 17, the support pipe 17 is rotatably installed on the oil tank 5 and the cylinder 13, the discharge cavity is arranged in the filter cartridge 16, a plurality of filter holes communicated with the discharge cavity are arranged on the side wall of the filter cartridge 16, the upper end of the support pipe 17 is communicated with the discharge cavity, the valve is arranged on the support pipe 17, the lower end of the support pipe 17 is communicated with the oil tank 5; when in use, the oil discharged by the oil discharge mechanism enters the cylinder 13 through the discharge pipe 15, then the oil in the cylinder 13 enters the discharge cavity in the filter cartridge 16 after being filtered through the filter holes on the filter cartridge 16, then the oil in the filter cartridge 16 enters the oil tank 5 through the support pipe 17; through the filtration of the hydraulic oil by the filter cartridge 16, the impurities in the hydraulic oil are reduced, it is convenient to use and has high practicability.

[0024] As Figure 4 , the brush 18 is installed in the cylinder 13, the brush 18 is tightly attached to the outer side wall of the filter cartridge 16, the rotating mechanism is installed on the cylinder 13 and the filter cartridge 16, the rotating mechanism is used for rotating the filter cartridge 16; when the filter cartridge 16 needs to be cleaned, the hydraulic oil in the filter cartridge 16 and the cylinder 13 is emptied, then the rotating mechanism is opened, the filter cartridge 16 is rotated, the filter cartridge 16 is uniformly contacted with the brush 18 in the process of rotation, then the solid impurities on the outer side wall of the filter cartridge 16 are cleaned by the brush 18; it is convenient to clean the impurities on the outer side wall of the filter cartridge 16.

[0025] As Figure 4 , the rotating mechanism includes motor 19 and rotating shaft 20, the motor 19 is fixedly installed on the upper end of the cylinder 13, the rotating shaft 20 is rotatably installed on the cylinder 13, the lower end of the rotating shaft 20 is connected with the filter cartridge 16, the upper end of the rotating shaft 20 is connected with the output end of the motor 19, the rotating shaft 20 is coaxial with the support pipe 17; when the filter cartridge 16 is rotated, the motor 19 is opened, the motor 19 rotates the filter cartridge 16 through the rotating shaft 20; it is convenient to rotate the filter cartridge 16.

[0026] Embodiment 2

[0027] On the basis of embodiment 1, a sealing cover 21 is additionally arranged, the lower part of the cylinder body 13 is provided with a blowdown port communicated with the oil cavity, the sealing cover 21 is bolted on the outside of the blowdown port; the impurities falling from the filter cartridge 16 when the brush 18 sweeps the filter cartridge 16 fall above the sealing cover 21, when the impurities are cleaned, the sealing cover 21 is detached on the cylinder body 13, and then the impurities can be cleaned; the convenience is improved.

[0028] The push rod 2, the electric oil pump 6, the filter cartridge 16, the brush 18 and the motor 19 of the valve electro-hydraulic actuator are all purchased on the market, and the technical personnel in the industry only needs to install and operate according to the attached instruction manual, without the technical personnel in the field paying creative labor.

[0029] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for the ordinary technical personnel in the technical field, several improvements and modifications can be made without departing from the technical principle of the utility model, and these improvements and modifications should also be regarded as the protection range of the utility model.

Claims

1. A valve electro-hydraulic actuator, comprising a cylinder (1), a push rod (2), and a gate (3), wherein a chamber is provided inside the cylinder (1), a piston (4) is slidably mounted in the chamber of the cylinder (1), the upper end of the push rod (2) is fixedly connected to the piston (4), the push rod (2) is slidably mounted on the cylinder (1), and the gate (3) is fixedly mounted on the lower end of the push rod (2); characterized in that, It also includes a conveying mechanism and a filtering mechanism. The conveying mechanism is connected to the chamber of the cylinder (1). The conveying mechanism is used to deliver hydraulic oil to the chamber of the cylinder (1) and thereby control the lifting and lowering of the piston (4). The conveying mechanism is equipped with a filtering mechanism, which has a filtering function.

2. The valve electro-hydraulic actuator as described in claim 1, characterized in that, The conveying mechanism includes an oil tank (5), an electric oil pump (6), an oil delivery pipe (7), a delivery pipe (8), an oil inlet pipe A (9), an oil inlet pipe B (10), and an oil discharge mechanism. The oil tank (5) has a cavity. The input end of the electric oil pump (6) is connected to the cavity of the oil tank (5) through the oil delivery pipe (7). The output end of the electric oil pump (6) is connected to the delivery pipe (8). The oil inlet pipe A (9) and the oil inlet pipe B (10) are both connected to the delivery pipe (8). Valves are provided on the oil inlet pipe A (9) and the oil inlet pipe B (10). The output ends of the oil inlet pipe A (9) and the oil inlet pipe B (10) are respectively connected to the lower and upper parts of the cylinder body (1) chamber. The oil discharge mechanism is connected to the cylinder body (1) chamber. The output end of the oil discharge mechanism is connected to the oil tank (5) through a filter mechanism.

3. The valve electro-hydraulic actuator as described in claim 2, characterized in that, The oil draining mechanism includes an oil drain pipe A (11) and an oil drain pipe B (12). The oil drain pipe A (11) and the oil drain pipe B (12) are respectively connected to the upper and lower parts of the cylinder (1) chamber. The output ends of the oil drain pipe A (11) and the oil drain pipe B (12) are both connected to the filter mechanism. Valves are provided on the oil drain pipe A (11) and the oil drain pipe B (12).

4. The valve electro-hydraulic actuator as described in claim 3, characterized in that, The filtration mechanism includes a cylinder (13), a support frame (14), a discharge pipe (15), a filter cartridge (16), and a support pipe (17). The cylinder (13) has an oil chamber inside. The cylinder (13) is fixedly installed on the upper end of the oil tank (5) through the support frame (14). The output end of the discharge pipe (15) is connected to the oil chamber of the cylinder (13). The oil discharge pipe A (11) and the oil discharge pipe B (12) are both connected to the discharge pipe (15). The filter cartridge (16) is fixedly installed on the upper end of the support pipe (17). The support pipe (17) is rotatably installed on the oil tank (5) and the cylinder (13). The filter cartridge (16) has a discharge chamber inside. The side wall of the filter cartridge (16) has multiple sets of filter holes connected to the discharge chamber. The upper end of the support pipe (17) is connected to the discharge chamber. The support pipe (17) has a valve. The lower end of the support pipe (17) is connected to the oil tank (5).

5. The valve electro-hydraulic actuator as described in claim 4, characterized in that, It also includes a brush (18) and a rotating mechanism. The brush (18) is installed inside the cylinder (13) and is attached to the outer wall of the filter cartridge (16). The rotating mechanism is installed on the cylinder (13) and the filter cartridge (16) and is used to rotate the filter cartridge (16).

6. The valve electro-hydraulic actuator as described in claim 5, characterized in that, The rotating mechanism includes a motor (19) and a rotating shaft (20). The motor (19) is fixedly installed on the upper end of the cylinder (13), and the rotating shaft (20) is rotatably installed on the cylinder (13). The lower end of the rotating shaft (20) is connected to the filter cartridge (16), and the upper end of the rotating shaft (20) is connected to the output end of the motor (19). The rotating shaft (20) is coaxial with the support tube (17).

7. The valve electro-hydraulic actuator as described in claim 4, characterized in that, It also includes a sealing cap (21), and the lower part of the cylinder (13) is provided with a drain port that communicates with the oil chamber. The sealing cap (21) is installed on the outside of the drain port by bolts.

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