CN216922680U

CN216922680U - Hydraulic integrated block for valve of steam turbine of nuclear power station

Info

Publication number: CN216922680U
Application number: CN202220154954.8U
Authority: CN
Inventors: 郑辉; 蒋波; 何东
Original assignee: China General Nuclear Power Corp; Daya Bay Nuclear Power Operations and Management Co Ltd; Lingdong Nuclear Power Co Ltd; Guangdong Nuclear Power Joint Venture Co Ltd; Lingao Nuclear Power Co Ltd
Current assignee: China General Nuclear Power Corp; Daya Bay Nuclear Power Operations and Management Co Ltd; Lingdong Nuclear Power Co Ltd; Guangdong Nuclear Power Joint Venture Co Ltd; Lingao Nuclear Power Co Ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-07-08
Anticipated expiration: 2032-01-20

Abstract

The utility model relates to the technical field of steam turbine auxiliary systems, and discloses a hydraulic manifold block of a steam turbine valve of a nuclear power station, which comprises a hydraulic body and a filtering module which is detachably connected with the oil inlet end of an oil pipeline in the hydraulic body and is used for filtering hydraulic oil, wherein the filtering module comprises at least two filtering filter cylinders which are arranged in parallel, an isolating valve used for controlling the on-off of an oil circuit of the manifold block is arranged on the oil pipeline at the inlet end of each filtering filter cylinder, a one-way valve is arranged on the oil pipeline at the outlet end of each filtering filter cylinder, and the filtering module is connected with a pressure monitoring warning module which is used for detecting the pressure difference between the inlet and the outlet of the filtering module in parallel; by arranging at least two filtering filter cylinders connected in parallel, a plurality of filtering filter cylinders can run simultaneously, the dirt holding capacity of the filtering filter cylinders is improved, and the replacement frequency of the filtering filter cylinders can be reduced; the online replacement of the filter cartridge is realized, the shutdown replacement of the turbine unit is avoided, and the maintenance period of the unit is shortened; the filter cartridge is quickly disassembled and assembled when being replaced.

Description

Hydraulic integrated block for valve of steam turbine of nuclear power station

Technical Field

The utility model relates to the technical field of steam turbine auxiliary systems, in particular to a hydraulic integrated block of a steam turbine valve of a nuclear power station.

Background

In order to utilize instrument and equipment to the maximum extent in an oil system, hydraulic oil is often required to be filtered before or during use, and the prior art or the implementation method has the following defects: a filter element of a hydraulic manifold block oil inlet filter of a steam turbine valve is frequently blocked; the hydraulic manifold block of the turbine valve can not bypass the oil inlet filter, and the replacement of the filter element needs to isolate the hydraulic oil of the turbine valve, which causes the closing of the valve, so that the power reduction of the unit or the shutdown of the unit is needed when the replacement of the filter element is executed; originally, need regularly change hydraulic module oil feed filter core at an interval, influence the reliability and the strong rate of damaging of unit.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a hydraulic manifold block of a steam turbine valve of a nuclear power station aiming at the defects of the prior art, wherein a plurality of filter cartridges can run simultaneously, the dirt holding capacity of the filter cartridges is improved, the replacement frequency of the filter cartridges can be reduced, and the filter cartridges can be replaced online.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a nuclear power station steam turbine valve hydraulic manifold block, includes the hydraulic pressure body and can dismantle the connection and strain the filter module that is used for filtering hydraulic oil at hydraulic pressure body internal oil circuit pipeline inlet end, filter module includes that at least two parallelly connected filtration that set up strain a section of thick bamboo, every be provided with the isolating valve that is used for controlling manifold block oil circuit break-make on filtering the oil circuit pipeline of straining a section of thick bamboo entry end, every filter module connects in parallel and is used for detecting the pressure monitoring warning module of pressure differential between filter module entry and the export.

Further, preferably, the filtering module includes two filtering cartridges arranged in parallel, and two corresponding isolation valves and two corresponding check valves are respectively arranged.

Further, preferably, the filter cartridge comprises a housing and a filter element arranged in the housing, and the housing is of a detachable structure.

Further, preferably the filter core is glass fiber material spare, the filter fineness of filter core is greater than 5 um.

Further, preferably, the connection mode of the hydraulic body and the filter cartridge is at least one of screw joint, clamping, interference fit and pin joint.

Further, preferably, the isolation valve is a needle-type isolation valve.

Preferably, an isolation area is formed among the isolation valve, the filter cartridge and the one-way valve, and an exhaust and oil discharge valve for exhausting and discharging oil is arranged in the isolation area between the filter cartridge and the one-way valve.

Further, it is preferable that the exhaust and oil discharge valve is a quick joint structure with a check function.

Preferably, the outlet end of the exhaust oil valve is further provided with a female joint oil drain pipe matched with the exhaust oil valve, and the female joint oil drain pipe is connected with a pressure gauge for detecting the isolation state of the filter module.

Further, preferably, the pressure monitoring and warning module comprises a pressure detection meter, a controller connected with the pressure detection meter, and an alarm connected with the controller.

The utility model has the following beneficial effects: the hydraulic integrated block of the steam turbine valve of the nuclear power station, provided by the utility model, simplifies the filtering structure, and can realize filtering only by integrating at least two filtering cartridges connected in parallel in the hydraulic structure. The two filter cartridges can be operated simultaneously or singly, so that the dirt holding capacity of the filter cartridges is improved, and the replacement frequency of the filter cartridges can be reduced; the oil circuit of the filter cartridge to be replaced is isolated by controlling the isolation valve, so that the online replacement of the filter cartridge is realized, the turbine unit is prevented from being stopped and replaced, and the maintenance period of the turbine unit is shortened; the effective isolation of the hydraulic oil in the isolation area can be realized by arranging the isolation valve and the one-way valve; the hydraulic body is detachably connected with the filtering filter cylinder, so that the filtering filter cylinder can be quickly disassembled and assembled when being replaced.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic perspective view of a hydraulic manifold block according to the present invention;

FIG. 2 is a schematic view of the internal connections of the hydraulic manifold of the present invention;

fig. 3 is a cross-sectional view of a filter cartridge of the hydraulic manifold block of the present invention.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

An element is said to be "secured to" or "disposed on" another element, either directly or indirectly to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

The terms "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to an orientation or position based on the orientation or position shown in the drawings.

The terms "axial" and "radial" refer to the length of the entire device or component as "axial" and the direction perpendicular to the axial direction as "radial".

The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

The above terms are for convenience of description only and are not to be construed as limiting the present technical solution.

As shown in fig. 1-3, a hydraulic manifold block of a steam turbine valve of a nuclear power station comprises a hydraulic body 1 and a filter module 2 detachably connected to an oil inlet end of an oil pipeline in the hydraulic body 1 and used for filtering hydraulic oil, wherein the filter module 2 comprises at least two filter cartridges 21 arranged in parallel, two or more filter cartridges 21 can be arranged, the plurality of filter cartridges 21 operate simultaneously, an isolation valve 3 used for controlling the on-off of an oil circuit of the manifold block is arranged on an oil pipeline at an inlet end of each filter cartridge 21, the isolation valve 3 is a needle-type isolation valve capable of being accurately adjusted, a check valve 4 is arranged on an oil pipeline at an outlet end of each filter cartridge 21, a pressure monitoring and warning module 5 used for detecting the pressure difference between the inlet and the outlet of the filter module 2 is connected in parallel to the filter module 2, and the pressure monitoring and warning module 5 is provided with a pressure difference standard value in advance, when the pressure monitoring and warning module 5 detects that the pressure difference between the inlet and the outlet of the filtering module 2 exceeds a preset pressure difference standard value, the pressure monitoring and warning module 5 sends a warning to remind that the filtering cartridge 21 is blocked and needs to be replaced by a new filtering cartridge 21; by arranging at least two filter cartridges 21 connected in parallel and controlling the isolating valve 3 to isolate the oil path of the filter cartridge 21 to be replaced, the online replacement of the filter cartridge 21 is realized, the steam turbine unit is prevented from being stopped and replaced, and the maintenance period of the unit is shortened.

The implementation process of the hydraulic manifold block of the steam turbine valve comprises the following steps: when the hydraulic oil filtering device works, hydraulic oil enters the hydraulic body 1, the isolation valves 3 are all opened (the number of the filter cartridges 21 which are arranged in parallel is that the isolation valves 3 and the check valves 4 are correspondingly arranged, respectively), the hydraulic oil passes through the isolation valves 3 and is filtered by the filter cartridges 21 behind the isolation valves 3, impurities are isolated at the inlet ends of the filter cartridges 21 and cannot enter, and the filtered hydraulic oil flows to other areas of the hydraulic body 1 through the check valves 4; when one filtering cartridge 21 is blocked, the pressure monitoring and warning module 5 detects that the pressure difference between the inlet and the outlet of the filtering cartridge 21 exceeds a preset pressure difference standard value, the pressure monitoring and warning module 5 gives a warning, at the moment, the isolating valve 3 and the one-way valve 4 corresponding to the filtering cartridge 21 to be replaced are closed, the isolating valve 3 and the one-way valve 4 on the other filtering cartridges 21 are in an open state, even if the other filtering cartridges 21 are still in a running state, the air inlet and oil inlet control of a steam turbine valve is confirmed to be normal, the power of the steam turbine is not fluctuated, the blocked filtering cartridge 21 is disassembled, a new filtering cartridge 21 is replaced, the corresponding isolating valve 3 and the one-way valve 4 are opened after the replacement is finished, and the new filtering cartridge 21 continues to filter hydraulic oil.

In a specific embodiment, the filter module 2 includes two filter cartridges 21 arranged in parallel, the two filter cartridges 21 arranged in parallel are designed, so that two oil distribution paths can be formed at the filter module 2 after hydraulic oil enters the hydraulic body 1, the hydraulic oil is divided into two parts and is filtered by the two filter cartridges 21 respectively, the corresponding isolation valve 3 and one-way valve 4 are arranged respectively, that is, an isolation valve 3 is arranged on an oil path pipeline at the inlet end of each filter cartridge 21, each isolation valve 3 controls the on-off of the oil distribution path on the corresponding filter cartridge 21, the two filter cartridges 21 can be operated simultaneously or individually by the arrangement of the isolation valve 3, so as to realize online replacement of the filter cartridges 21, the filter cartridges can be replaced online only by closing the isolation valve 3 and the one-way valve 4 corresponding to the filter cartridge 21 to be replaced, one-way valve 4 is arranged on the oil path pipeline at the outlet end of each filter cartridge 21, the one-way valve 4 prevents the hydraulic oil on the oil distribution path from flowing reversely; the arrangement of the two filter cartridges 21 improves the dirt holding capacity of the filter cartridges 21, and the filtering workload is distributed to the two filter cartridges 21, so that the replacement frequency of the filter cartridges 21 is reduced, the filter cartridges 21 can be replaced on line, and an air inlet valve of a steam turbine generator does not need to be isolated.

The hydraulic body 1 and the filtering filter cylinder 21 are detachably connected in at least one of a threaded connection mode, a clamping connection mode, an interference fit mode and a pin connection mode, the detachable connection mode is beneficial to replacement of the filtering filter cylinder 21, a screw-in threaded connection mode is preferred, and quick disassembly and assembly during replacement of the filtering filter cylinder 21 during operation of an integrated block are achieved; the filter cartridge 21 comprises a shell 211 with a cylindrical structure and a filter element 212 arranged in the shell 211, the shell 211 is of a detachable structure, so that the shell 211 can be reused, when the filter cartridge 21 is replaced, only the filter element 212 in the shell 211 needs to be replaced, the filter element 212 is a glass fiber material, and the filter precision of the filter element 212 is greater than 5um, so that fine filtration of hydraulic oil is realized, the hydraulic manifold block can run more smoothly, and the service life of the manifold block is prolonged; the filtering cartridge 21 has a simple structure, and solves the problems of more sealing parts and larger occupied installation space of the traditional filter.

An isolation area is formed between the isolation valve 3 and the filtering filter cartridge 21 and the one-way valve 4, effective isolation of hydraulic oil in the isolation area is achieved, an exhaust oil drain valve 6 used for exhausting and draining oil is arranged in the isolation area between the filtering filter cartridge 21 and the one-way valve 4, the exhaust oil drain valve 6 is a quick joint structure with a non-return function, a female joint oil drain pipe 8 matched with the exhaust oil drain valve 6 is further arranged at the outlet end of the exhaust oil drain valve 6, the female joint oil drain pipe 8 is connected to the exhaust oil drain valve 6 to enable the exhaust oil drain valve 6 to be in an open state, oil pressure in the isolation area is released, hydraulic oil in an oil line pipeline can flow to the female joint oil drain pipe 8, and the exhaust oil drain valve 6 is in a closed state when the female joint oil drain pipe 8 is not connected to the exhaust oil drain valve 6; a pressure gauge 8 for detecting the isolation state of the filter module 2 is connected to the female joint oil discharge pipe 8, whether an isolation area formed between the isolation valve 3 and the one-way valve 4 is tight is verified by observing the pressure change on the pressure gauge 8, if the filter cartridge 21 needs to be replaced on line, the corresponding isolation valve 3 and the one-way valve 4 are closed, the female joint oil discharge pipe 8 needs to be connected to an oil discharge exhaust valve, the oil discharge exhaust valve is in an open state after the connection, the oil pressure in the isolation area is released, the pressure change of the pressure gauge 8 is observed, if the isolation is tight, no continuous hydraulic oil can be discharged after the hydraulic oil in the isolation area is exhausted, and the pressure gauge 8 cannot detect the pressure after the connection, at the moment, the filter cartridge 21 can be replaced, the corresponding isolation valve 3 is opened after the filter cartridge 21 is replaced, the female joint oil discharge pipe 8 is connected to the oil discharge exhaust valve again for exhausting, after continuous hydraulic oil is discharged, the connection between the oil discharge exhaust valve and the female joint oil discharge pipe 8 is disconnected; if the isolation is not tight, continuous hydraulic oil is discharged, the pressure gauge 8 detects the pressure, the connection between the exhaust oil discharge valve 6 and the female joint oil discharge pipe 8 is disconnected at the moment, and the replacement of the filter cartridge 21 is stopped, so that the verification of the tightness of the isolation area is realized.

The pressure monitoring and warning module 5 comprises a pressure detection meter, a controller connected with the pressure detection meter, and an alarm connected with the controller, wherein the pressure detection meter detects pressure data between an inlet and an outlet of the filter module 2 and transmits the pressure data to the controller, the controller processes the inlet pressure quantity and the outlet pressure data of the filter module 2 to obtain pressure difference data, the measured pressure difference data is compared with a pressure difference standard value preset by the controller, when the pressure difference data is within the pressure difference standard value range, the alarm does not give an alarm, at the moment, it is indicated that the filter cartridge 21 is not blocked, the filter cartridge can still be used continuously, when the pressure difference standard value range is exceeded, the alarm gives an alarm, at the moment, it is indicated that the filter cartridge 21 is blocked, and the filter cartridge needs to be replaced.

Claims

1. The utility model provides a nuclear power station steam turbine valve hydraulic manifold block, its characterized in that includes hydraulic pressure body (1) and can dismantle and connect filtration module (2) that are used for filtering hydraulic oil at hydraulic pressure body (1) interior oil circuit pipeline inlet end, filtration module (2) are strained section of thick bamboo (21) including the filtration of two at least parallelly connected settings, every be provided with isolation valve (3) that are used for controlling the manifold block oil circuit break-make on the oil circuit pipeline of straining section of thick bamboo (21) entry end, every be provided with check valve (4) on the oil circuit pipeline of straining section of thick bamboo (21) exit end, filtration module (2) parallel connection has and is used for detecting pressure monitoring warning module (5) of pressure differential between filtration module (2) entry and the export.

2. The nuclear power plant steam turbine valve hydraulic manifold block as recited in claim 1, characterized in that the filter module (2) comprises two filter cartridges (21) arranged in parallel, and two corresponding isolation valves (3) and check valves (4) are respectively arranged.

3. The nuclear power plant steam turbine valve hydraulic manifold of claim 1, wherein the filter cartridge (21) comprises a housing (211) and a filter element (212) disposed within the housing (211), and the housing (211) is a removable structure.

4. The nuclear power plant steam turbine valve hydraulic manifold block as claimed in claim 3, wherein the filter element (212) is a piece of fiberglass material, and the filter fineness of the filter element (212) is greater than 5 um.

5. The nuclear power plant steam turbine valve hydraulic manifold block as recited in claim 1, characterized in that the hydraulic body (1) and the filter cartridge (21) are connected in at least one of a threaded connection, a snap connection, an interference fit and a pin connection.

6. The nuclear power plant steam turbine valve hydraulic block according to claim 1, wherein the isolation valve (3) is a needle type isolation valve.

7. The nuclear power plant steam turbine valve hydraulic manifold block as recited in claim 1, characterized in that an isolation area is formed among the isolation valve (3), the filter cartridge (21) and the check valve (4), and an exhaust oil drain valve (6) for exhausting and draining oil is arranged in the isolation area between the filter cartridge (21) and the check valve (4).

8. The nuclear power plant steam turbine valve hydraulic manifold according to claim 7, characterized in that the exhaust oil drain valve (6) is a quick coupling structure with a check function.

9. The nuclear power plant steam turbine valve hydraulic manifold block as claimed in claim 8, wherein a female joint oil drain pipe (7) matched with the exhaust oil drain valve (6) is further arranged at the outlet end of the exhaust oil drain valve (6), and a pressure gauge (8) for detecting the isolation state of the filter module (2) is connected to the female joint oil drain pipe (7).

10. The nuclear power plant steam turbine valve hydraulic manifold block as recited in claim 1, characterized in that the pressure monitoring and warning module (5) comprises a pressure detection meter (51), a controller (52) connected with the pressure detection meter (51), and an alarm (53) connected with the controller.