Special tool for disassembling cartridge valve of hydraulic servo-motor

By designing a special tool for disassembling cartridge valves using a hydraulic actuator, the problem of difficult maintenance caused by cartridge valve jamming was solved, enabling rapid disassembly of the valve core and valve cage, thus avoiding component damage and oil contamination.

CN223777074UActive Publication Date: 2026-01-09GUANGDONG YUDEAN BOHE COAL POWER CO LTD
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Patent Information

Application Number
CN202520248804.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-17
Publication Date
2026-01-09
Estimated Expiration
2035-02-17

AI Technical Summary

Technical Problem

During the turbine oil actuator activity test, the cartridge valves became stuck due to the quality of the EH oil and the clearance of the cartridge valves, making maintenance difficult. Furthermore, the lack of specialized tools made it easy to damage the valve cage and valve core, and contaminate the EH oil.

Method used

A special tool for disassembling a hydraulic cartridge valve has been designed, including a round sleeve, bearing, vertical threaded rod, cartridge sleeve, and linkage structure. Through the cooperation of the threaded sleeve and linkage, the cartridge sleeve can be expanded and extended, enabling the valve core and valve cage to be removed quickly.

Benefits of technology

It enables quick and efficient disassembly of cartridge valve cores and cages, reducing tool damage to components and maintaining the cleanliness of EH oil.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223777074U_ABST
Patent Text Reader

Abstract

The utility model discloses a special tool for disassembling a cartridge valve of a hydraulic servo-motor, relates to the technical field of the cartridge valve of the hydraulic servo-motor, and aims to solve the problem that the cartridge valve is jammed due to the oil quality of EH oil, the clearance of the cartridge valve and the like in the process of performing a mobility test on the hydraulic servo-motor of a steam turbine at present. In the process of overhauling the cartridge valve of the hydraulic servo-motor, the unilateral gap of the cartridge valve is only one thread, EH oil film adsorption exists, parts such as a cartridge valve element and a valve cage have no supporting points, the inner wall of the cartridge valve element is smooth, and overhauling personnel cannot dismantle the cartridge valve with hands or other tools. An EH oil system has extremely high requirements on oil quality, and has high requirements on cleanliness in a maintenance process. In order to solve the problems that existing cartridge valves are not provided with special dismounting tools, dismounting and overhauling of the cartridge valves are extremely difficult, parts such as a valve cage and a valve element are prone to being damaged, and EH oil is prone to being polluted, the cartridge valve comprises a round sleeve, a bearing is installed in the round sleeve, a vertical threaded rod is installed in an inner ring of the bearing, an inserting sleeve is installed on the round sleeve, and a through hole is formed in the inserting sleeve.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oil motor plug-in valve, and specifically relates to a special tool for disassembling oil motor plug-in valve. BACKGROUND

[0002] At present, the EH oil motor control mode is adopted for the turbine valve control of the coal-fired power plant of the Shanghai 600MW and 1000MW levels, the EH oil motor is a single-acting oil motor, that is, the pressure oil from the EH oil supply system is used for opening, and the spring force is used for closing. The oil motor is directly installed on the valve in a direct mounting mode, the closing spring chamber is arranged between the valve and the oil motor, and the closing spring chamber can also play a heat insulation role. When the oil motor is in the full closing position, the spring has a certain pre-compression amount, and a pre-pressure is provided. The high-pressure oil acts on the piston of the oil cylinder to overcome the spring force, so that the oil motor is opened. The oil motor is divided into the main valve oil motor and the regulating valve oil motor according to different control modes. The main valve oil motor is a full opening and full closing type, and only two positions of full opening and full closing exist. The regulating valve oil motor is a regulating type, and can be kept at different valve positions according to the control requirements.

[0003] However, in the process of the oil motor activity test of the turbine, the plug-in valve is jammed due to the reasons such as the EH oil quality and the gap of the plug-in valve. In the process of overhauling the oil motor plug-in valve, the single-side gap of the plug-in valve is only 1 silk, and the EH oil film adsorption exists. The plug-in valve spool, the valve cage and other components have no supporting point, the inner wall of the plug-in valve spool is smooth, and the maintenance personnel cannot disassemble the plug-in valve by hand or other tools. The EH oil system has a very high requirement on the oil quality, and has a high requirement on the cleanliness during the maintenance process. There is no special disassembling tool, and it is extremely difficult to disassemble and maintain the plug-in valve. The valve cage, the valve spool and other components are easily damaged, and the EH oil quality is easily polluted. SUMMARY

[0004] In view of the defects in the prior art, the utility model aims to provide a special tool for disassembling and assembling the oil motor plug-in valve, so as to solve the problems in the background art that the plug-in valve is jammed due to the reasons such as the EH oil quality and the gap of the plug-in valve in the process of the oil motor activity test of the turbine. In the process of overhauling the oil motor plug-in valve, the single-side gap of the plug-in valve is only 1 silk, and the EH oil film adsorption exists. The plug-in valve spool, the valve cage and other components have no supporting point, the inner wall of the plug-in valve spool is smooth, and the maintenance personnel cannot disassemble the plug-in valve by hand or other tools. The EH oil system has a very high requirement on the oil quality, and has a high requirement on the cleanliness during the maintenance process. There is no special disassembling tool, and it is extremely difficult to disassemble and maintain the plug-in valve. The valve cage, the valve spool and other components are easily damaged, and the EH oil quality is easily polluted.

[0005] The utility model discloses a special tool for disassembling an oil motor plug-in valve, which comprises a sleeve, a vertical threaded rod is installed in the inner ring of a bearing inner bearing installed in the sleeve, a plug sleeve is installed on the sleeve, a through hole is formed in the plug sleeve, the vertical threaded rod passes through the through hole, a linkage structure is installed in the plug sleeve, the linkage structure comprises a threaded sleeve and a linkage piece.

[0006] The threaded sleeve is sleeved on the vertical threaded rod, the linkage piece is installed between the threaded sleeve and the plug sleeve, the number of the linkage pieces is four, the linkage pieces are annularly and equidistantly distributed between the threaded sleeve and the plug sleeve, and the linkage piece comprises a protruding block, a connecting block and a connecting plate.

[0007] The protruding block is installed on the threaded sleeve, the connecting block is installed in the plug sleeve, one end of the connecting plate is rotationally connected with the protruding block through a pin shaft, and the other end of the connecting plate is rotationally connected with the connecting block through a pin shaft.

[0008] A vertical rod is installed on the vertical threaded rod, a horizontal threaded rod is installed in an arc-shaped through groove on the vertical rod, and threaded pipes are sleeved on two ends of the horizontal threaded rod.

[0009] Preferably, auxiliary structures are installed on the sleeve, the number of the auxiliary structures is four, the auxiliary structures are annularly and equidistantly distributed outside the sleeve, and the auxiliary structure comprises a horizontal plate, a vertical hole and an auxiliary rod.

[0010] A base is arranged below the sleeve, the horizontal plate is installed on the sleeve, the vertical hole is formed in the horizontal plate, the auxiliary rod passes through the vertical hole, and the auxiliary rod is installed on the base.

[0011] Preferably, fixing structures are installed on the base, the number of the fixing structures is two, the fixing structures are symmetrically distributed on two sides of the center line of the base, and the fixing structure comprises a threaded hole stand plate and a bolt.

[0012] The threaded hole stand plate is installed on the base, and the bolt is sleeved in the threaded hole on the threaded hole stand plate.

[0013] Preferably, a screw is installed on the vertical rod, a threaded groove is formed in the vertical threaded rod, and the screw is sleeved in the threaded groove.

[0014] Preferably, a round head is installed on the auxiliary rod, and the round head corresponds to the auxiliary rod one by one.

[0015] Preferably, a screw head is installed on the vertical threaded rod.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The plug is inserted into the valve core of the oil motor plug-in valve manually, the round sleeve is supported, the vertical screw rod is rotated on the round sleeve through the bearing, the vertical screw rod is rotated in the through hole in the plug, at this time the threaded sleeve moves downward along the vertical screw rod and moves the protruding block downward, at this time the angle between the connecting plate and the protruding block is increased through the pin shafts movably arranged on the protruding block and the connecting block, the plug is deformed and expanded at this time, and is tightly attached to the inner wall of the valve core of the oil motor plug-in valve, and the vertical rod is inserted into the valve core of the oil motor plug-in valve, the threaded sleeve moves outward along the horizontal screw rod, the threaded sleeve expands and changes the length, the threaded sleeve is hooked in the valve cage, and the plug-in valve cage is pulled out upward, so that the plug-in valve core and the valve cage can be taken out quickly and efficiently, damage of other tools to the plug-in valve is reduced, the maintenance workload is reduced, meanwhile, the structure is entirely made of 316 stainless steel material, and rust of tools is avoided to affect the quality of EH oil. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the utility model.

[0019] Figure 2 is a structural schematic diagram of the protruding block, the connecting block and the connecting plate.

[0020] Figure 3 is a structural schematic diagram of the vertical rod, the horizontal screw rod and the threaded pipe.

[0021] Figure 4 is a structural schematic diagram of the round sleeve, the bearing and the vertical screw rod.

[0022] Among them:

[0023] 1-round sleeve; 2-bearing; 3-vertical screw rod; 4-linkage structure; 401-threaded sleeve; 402-protruding block; 403-connecting block; 404-connecting plate; 5-screw head; 6-plug; 7-through hole; 8-vertical rod; 9-horizontal screw rod; 10-threaded pipe; 11-screw; 12-thread groove; 13-assistant structure; 14-horizontal plate; 15-vertical hole; 16-assistant rod; 17-round head; 18-base; 19-fixing structure; 20-stand plate with threaded hole; 21-bolt DETAILED DESCRIPTION

[0024] The utility model will be further described below in combination with specific embodiments, and it should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the claims attached to the application.

[0025] The components of the utility model are all general standard components or components known by those skilled in the art, and the structure and principle thereof can be known by the technical personnel through technical manuals or through conventional experimental methods.

[0026] Referring to Figures 1-4 It is the structural schematic diagram of the utility model, the embodiment of the utility model provides a kind of oil engine plug-in valve special tool of dismounting, including round sleeve 1, bearing 2 is installed in round sleeve 1 inner, the inner ring of bearing 2 is installed with vertical screw rod 3, plug sleeve 6 is installed on round sleeve 1, through hole 7 is set up on plug sleeve 6, vertical screw rod 3 passes through through hole 7, connecting structure 4 is installed in plug sleeve 6, and connecting structure 4 includes threaded sleeve 401 and connecting piece;

[0027] Threaded sleeve 401 is sleeved on vertical screw rod 3, connecting piece is installed between threaded sleeve 401 and plug sleeve 6, the number of connecting piece is four, connecting piece is annularly equidistantly distributed between threaded sleeve 401 and plug sleeve 6, and connecting piece includes lug 402, connecting block 403 and connecting plate 404;

[0028] Lug 402 is installed on threaded sleeve 401, connecting block 403 is installed in plug sleeve 6, one end of connecting plate 404 is rotatably connected with lug 402 by pin shaft, and the other end of connecting plate 404 is rotatably connected with connecting block 403 by pin shaft;

[0029] Vertical screw rod 3 is installed with vertical rod 8, and horizontal screw rod 9 is installed in the arc-shaped through slot on vertical rod 8, and threaded pipe 10 is sleeved on the two ends of horizontal screw rod 9.

[0030] It needs to be explained that, in the embodiment, all structures are purchased 316 stainless steel material, the thickness of plug sleeve 6 is 1-2mm, four openings are equidistantly set up on plug sleeve 6, and connecting block 403 is connected on the plug sleeve 6 body between adjacent two openings, and vertical screw rod 3 and bearing 2 inner ring contact position is not processed thread.

[0031] Specifically, in use, the plug sleeve 6 is inserted into the valve core of the oil motor plug-in valve, the round sleeve 1 is held, the vertical threaded rod 3 is rotated on the round sleeve 1 through the bearing 2, the vertical threaded rod 3 is rotated in the through hole 7 on the plug sleeve 6, at this time the threaded sleeve 401 moves downward along the vertical threaded rod 3 and drives the protruding block 402 to move downward, at this time the connecting plate 404 moves on the protruding block 402 and the connecting block 403 through the pin shaft respectively, so that the included angle between the connecting plate 404 and the protruding block 402 is increased, at this time the plug sleeve 6 is deformed and expanded, and is tightly attached to the inner wall of the valve core of the oil motor plug-in valve, and the vertical rod 8 is inserted into the oil motor plug-in valve, the threaded sleeve 10 is moved outward along the horizontal threaded rod 9, the threaded sleeve 10 expands and changes length, and the threaded sleeve 10 is hooked in the valve cage, and the plug-in valve cage is pulled out by moving upward, so that the plug-in valve core and the valve cage can be quickly and efficiently taken out, the damage of other tools to the plug-in valve is reduced, the maintenance workload is reduced, and the structure is made of 316 stainless steel material to avoid rust of tools affecting the quality of EH oil.

[0032] The round sleeve 1 is provided with auxiliary structures 13, the number of the auxiliary structures 13 is four, the auxiliary structures 13 are annularly and equidistantly distributed outside the round sleeve 1, and the auxiliary structure 13 comprises a horizontal plate 14, a vertical hole 15 and an auxiliary rod 16;

[0033] The round sleeve 1 is provided with a base 18, the horizontal plate 14 is installed on the round sleeve 1, the vertical hole 15 is formed in the horizontal plate 14, the auxiliary rod 16 penetrates through the vertical hole 15, and the auxiliary rod 16 is installed on the base 18;

[0034] The base 18 is provided with fixing structures 19, the number of the fixing structures 19 is two, the fixing structures 19 are symmetrically distributed on two sides with the center line of the base 18 as the center, and the fixing structure 19 comprises a threaded hole vertical plate 20 and a bolt 21;

[0035] The threaded hole vertical plate 20 is installed on the base 18, and the bolt 21 is sleeved in the threaded hole on the threaded hole vertical plate 20;

[0036] The vertical rod 8 is provided with a screw 11, and the vertical threaded rod 3 is provided with a threaded groove 12, and the screw 11 is sleeved in the threaded groove 12;

[0037] The auxiliary rod 16 is provided with a round head 17, and the round head 17 corresponds to the auxiliary rod 16 in one-to-one correspondence;

[0038] The vertical threaded rod 3 is provided with a screw head 5.

[0039] It should be noted that in the embodiment, the structure is made of 316 stainless steel material, the screw head 5 is matched with an external open-end wrench, the length of the bolt 21 can be selected according to actual use, when screwing, the bolt 21 is screwed synchronously, the bolt 21 moves inward or outward, and the moving distances are equal, and the round head 17 prevents the horizontal plate 14 from being separated from the auxiliary rod 16.

[0040] Specific, use, artificial screw 11 on the vertical rod 8 is screwed into the vertical threaded rod 3 on the screw groove 12, the oil motor plug-in valve is placed on the base 18, placed between the bolt 21, rotate the bolt 21 in the threaded hole in the vertical threaded rod 3 on the threaded hole in the same move, the bolt 21 clamping oil motor plug-in valve, the oil motor plug-in valve is fixed on the center position of the base 18, down the round sleeve 1, the vertical hole 15 on the horizontal plate 14 along the auxiliary rod 16 down, make the plug sleeve 6 plug into the valve core of the oil motor plug-in valve.

[0041] Through the person in the art, the parts in the case are connected in turn, the specific connection and operation sequence should be referred to the following working principle, the detailed connection means is the prior art, the following mainly introduces the working principle and process.

[0042] The working process and working principle of the utility model: when using, artificial screw 11 on the vertical rod 8 is screwed into the vertical threaded rod 3 on the screw groove 12, the oil motor plug-in valve is placed on the base 18, placed between the bolt 21, rotate the bolt 21 in the threaded hole in the vertical threaded rod 3 on the threaded hole in the same move, the bolt 21 clamping oil motor plug-in valve, the oil motor plug-in valve is fixed on the center position of the base 18, down the round sleeve 1, the vertical hole 15 on the horizontal plate 14 along the auxiliary rod 16 down, make the plug sleeve 6 plug into the valve core of the oil motor plug-in valve.

[0043] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A special tool for disassembling an oil motor plug-in valve, comprising a round sleeve (1), characterized in that: The inner ring of the inner bearing (2) is provided with a vertical threaded rod (3), the sleeve (1) is provided with a plug sleeve (6), the plug sleeve (6) is provided with a through hole (7), the vertical threaded rod (3) passes through the through hole (7), the plug sleeve (6) is provided with a linkage structure (4), and the linkage structure (4) comprises a threaded sleeve (401) and a linkage piece. The threaded sleeve (401) is sleeved on the vertical threaded rod (3), the linkage piece is arranged between the threaded sleeve (401) and the plug sleeve (6), the number of the linkage piece is four, the linkage piece is annularly and equidistantly distributed between the threaded sleeve (401) and the plug sleeve (6), and the linkage piece comprises a lug (402), a connecting block (403) and a connecting plate (404). The lug (402) is arranged on the threaded sleeve (401), the connecting block (403) is arranged in the plug sleeve (6), one end of the connecting plate (404) is rotationally connected with the lug (402) through a pin shaft, and the other end of the connecting plate (404) is rotationally connected with the connecting block (403) through a pin shaft. The vertical threaded rod (3) is provided with a vertical rod (8), the vertical rod (8) is provided with an arc-shaped through groove, and a horizontal threaded rod (9) is arranged in the arc-shaped through groove.

2. The oil engine stuffing valve dismounting special tool according to claim 1, characterized in that: The sleeve (1) is provided with auxiliary structures (13), the number of the auxiliary structures (13) is four, the auxiliary structures (13) are annularly and equidistantly distributed outside the sleeve (1), and the auxiliary structures (13) comprise a horizontal plate (14), a vertical hole (15) and an auxiliary rod (16). A base (18) is arranged below the sleeve (1), the horizontal plate (14) is arranged on the sleeve (1), the vertical hole (15) is arranged on the horizontal plate (14), the auxiliary rod (16) passes through the vertical hole (15), and the auxiliary rod (16) is arranged on the base (18).

3. The oil engine stuffing valve dismounting special tool according to claim 2, characterized in that: The base (18) is provided with fixing structures (19), the number of the fixing structures (19) is two, the fixing structures (19) are symmetrically distributed on both sides of the center line of the base (18), and the fixing structures (19) comprise a threaded hole vertical plate (20) and a bolt (21). The threaded hole vertical plate (20) is arranged on the base (18), and the bolt (21) is sleeved in the threaded hole on the threaded hole vertical plate (20).

4. The oil engine stuffing valve dismounting special tool according to claim 1, characterized in that: The vertical rod (8) is provided with a screw (11), the vertical threaded rod (3) is provided with a threaded groove (12), and the screw (11) is sleeved in the threaded groove (12).

5. The oil engine stuffing valve dismounting tool according to claim 2, characterized in that: The auxiliary rod (16) is provided with a round head (17), and the round head (17) corresponds to the auxiliary rod (16) in one-to-one manner.

6. The oil engine stuffing valve dismounting tool according to claim 1, characterized in that: The vertical threaded rod (3) is provided with a screw head (5).