CN220979985U - Plug-in mounting type unloading valve device - Google Patents
Plug-in mounting type unloading valve device Download PDFInfo
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- CN220979985U CN220979985U CN202323187481.5U CN202323187481U CN220979985U CN 220979985 U CN220979985 U CN 220979985U CN 202323187481 U CN202323187481 U CN 202323187481U CN 220979985 U CN220979985 U CN 220979985U
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- 238000007789 sealing Methods 0.000 claims abstract description 40
- 238000003754 machining Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 17
- 230000007246 mechanism Effects 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 description 8
- 230000006872 improvement Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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Abstract
An inserted unloading valve device belongs to the field of hydraulic valves. The technical problems that an unloading valve used on an oil motor of an existing steam turbine valve actuating mechanism is complex in structure and high in machining and assembling precision requirements, and the unloading valve is accidentally opened due to insufficient pressure at a valve core, so that potential safety hazards exist in a unit are solved. The valve seat lining is arranged on an integrated block of an external oil motor, a first sealing element is arranged between the valve seat and the integrated block, a pressure oil inlet is arranged at the bottom of the valve seat, a pressure oil outlet is arranged on the right side of the valve seat, a valve core is slidably connected with the inner wall of the valve seat, a cover plate is arranged at the top of the valve seat, a second sealing element is arranged between the cover plate and the valve seat, a third sealing element is arranged between the cover plate and the integrated block, the upper end and the lower end of a spring are respectively fixedly connected with the cover plate and the valve core, a pilot control oil channel is horizontally processed in the middle of the cover plate, and the pilot control oil channel is communicated with a pilot control oil pipe of the integrated block. The utility model is used for the unloading valve of the oil motor.
Description
Technical Field
The utility model relates to a plug-in type unloading valve device, and belongs to the field of hydraulic valves.
Background
At present, a plurality of 300MW and 600MW steam turbine generator units are domestic products introduced into the United states technology, and the domestic products basically keep all the introduced structures and sizes due to factors such as time urgency, low understanding of the technological connotation and the like.
In particular to an unloading valve structure used on a turbine valve actuator oil motor, which is called as a DUMP valve for short, and is mainly used for establishing the security oil pressure of a turbine EH system and maintaining the normal operation of the oil motor. However, the valve has a complex structure, high requirements on machining and assembling precision, the safety oil can build oil pressure only through the two throttling devices, and once the system pressure fluctuates, the valve core is extremely easy to cause insufficient pressure to cause the opening of the DUMP valve, the engine is closed, and the abnormal operation of the unit is caused. Through the long-term feedback of a plurality of power plants, the valve has very high failure rate in use, and serious potential safety hazards are brought to the operation of the unit.
The unloading valve used on the conventional turbine valve actuating mechanism oil motor has complex structure and high processing and assembling precision requirements, and is easy to cause insufficient pressure at a valve core to cause the unloading valve to be accidentally opened, so that the technical problem of potential safety hazard exists in a unit.
Disclosure of utility model
The utility model aims to solve the technical problems that an unloading valve used on an oil motor of an existing steam turbine valve actuating mechanism is complex in structure and high in machining and assembling precision, and the unloading valve is opened accidentally due to insufficient pressure at a valve core, so that potential safety hazards exist in a unit, and further provides a plug-in type unloading valve device. The technical scheme of the utility model is that the plug-in type unloading valve device is characterized in that a valve seat liner is arranged on an integrated block of an external oil engine, a first sealing element is arranged between the valve seat and the integrated block, a pressure oil inlet is arranged at the bottom of the valve seat, a pressure oil outlet is arranged on the right side of the valve seat, a valve core is in sliding connection with the inner wall of the valve seat, a cover plate is arranged at the top of the valve seat, a second sealing element is arranged between the cover plate and the valve seat, a third sealing element is arranged between the cover plate and the integrated block, the upper end and the lower end of a spring are respectively and fixedly connected with the cover plate and the valve core, a pilot control oil channel is horizontally processed in the middle of the cover plate, the pilot control oil channel is communicated with a pilot control oil pipe of the integrated block, pilot control oil enters a pilot control oil cavity between the cover plate and the valve core through the pilot control oil channel, the valve core is pushed to the bottom end of the valve seat, and the pressure oil channel between the pressure oil inlet and the pressure oil outlet is further sealed.
As another improvement of the utility model, a fourth sealing element is arranged at the interface of the pilot control oil channel and the communication part of the pilot control oil pipe of the integrated block.
As another improvement of the utility model, the fourth sealing element is an O-ring.
As another improvement of the utility model, the right end of the cover plate is provided with a process hole for processing the pilot control oil channel, and the process hole is provided with a process hole plug.
As another improvement of the utility model, a fifth sealing element is arranged between the process hole and the process hole plug.
As another improvement of the present utility model, the fifth seal is an O-ring seal.
As a further development of the utility model, the cover plate and the integrated block are connected by means of screw threads.
As another improvement of the utility model, a spring washer is arranged between the cover plate and the screw.
As another improvement of the utility model, the first sealing element, the second sealing element and the third sealing element are all O-shaped sealing rings.
The utility model has the beneficial effects that:
1. Compared with the prior unloading valve technology, the unloading valve is not easy to open accidentally due to stable pressure at the valve core, is not easy to be influenced by fluctuation of the control oil pressure, and can effectively and stably control the smooth and closed functions of the oil flow between the pressure oil cavity and the oil return cavity. Thereby eliminating the potential safety hazard of the unit.
2. The utility model can be directly used for replacing the unloading valve of the valve oil motor under the condition that the turbine unit has a shutdown, does not need to disassemble other part sleeves of the oil motor, and is simple, convenient and efficient.
Drawings
Fig. 1 is a schematic structural view of a cartridge type unloading valve device of the present utility model.
Fig. 2 is a view of an oil passage of a cartridge unloading valve device according to the present utility model.
Fig. 3 is a diagram showing the structure of a conventional unloading valve for an oil motor.
Fig. 4 is a diagram of an operating oil path of a conventional unloading valve for an oil motor.
Detailed Description
Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.
The first embodiment is as follows: referring to fig. 1 to 4, this embodiment of a cartridge unloading valve device is described, which includes a valve seat 5, a valve core 7, a spring 8, a first sealing member 9, a second sealing member 4, a third sealing member 6, a pilot control oil channel 13, a pressure oil inlet 14, a pressure oil outlet 15 and a cover plate 1, wherein the valve seat 5 is internally lined on an external integrated block 16 of an engine, the contact portion between the lower portion of the valve seat 5 and the integrated block 16 is provided with the first sealing member 9, the bottom of the valve seat 5 is provided with the pressure oil inlet 14, the right side of the valve seat 5 is provided with the pressure oil outlet 15, the valve core 7 is inserted in the valve seat 5, the valve core 7 is slidingly connected with the inner wall of the valve seat 5, the cover plate 1 is installed at the top of the valve seat 5, the second sealing member 4 is arranged between the cover plate 1 and the valve seat 5, the third sealing member 6 is arranged between the cover plate 1 and the integrated block 16, the spring 8 is installed in the valve core 7, the upper end and the lower end of the spring 8 is fixedly connected with the cover plate 1 and the valve core 7 respectively, the middle portion of the cover plate 1 is horizontally processed with the control oil channel 13, the pilot control oil channel 13 is arranged between the pilot control oil channel 13 and the pilot control oil channel 16 and the pilot oil channel 14 is pushed by the pilot oil channel and the pilot oil channel 7 is pushed to the bottom end of the pilot oil channel 7, which is sealed by the pilot oil channel is pushed by the pilot oil channel between the valve core 7 and the pilot oil channel is sealed by the pilot oil channel 7.
As shown in fig. 3, the original DUMP valve unloading valve is installed on an integrated block of the oil engine, and has the main function of controlling the on-off of a pressure working cavity and an oil return cavity channel of the oil engine, when pilot control oil enters a pilot control oil cavity of the DUMP valve unloading valve through primary throttling, a spool of the DUMP valve moves downwards, a sealing surface is attached in the process of controlling the oil to move downwards after secondary throttling, and the channel between the pressure oil and the oil return cavity is closed, so that the oil engine has a switch start-stop control function. Because the structure throttles twice and the sealing surfaces are more, once the pilot control oil fluctuates or any sealing surface is not tight, the sealing between the pressure oil and the oil return cavity is not tight, and the function of the oil engine is invalid.
The working oil circuit diagrams of fig. 2 and fig. 4 are compared to realize that the plug-in type unloading valve device of the embodiment has simple, safe and reliable processing and manufacturing process, can be directly used for replacing the valve oil motor unloading valve under the condition that the turbine unit is stopped, and can be used for realizing simple and efficient operation without disassembling an integrated block of the oil motor without disassembling the integrated block under the condition that the turbine unit is stopped, as can be seen from comparison of fig. 1 and fig. 3. The plug-in type unloading valve has the advantages that the control principle is simple and reliable, the control principle is not easily influenced by the fluctuation of the control oil pressure, and the smooth and closing functions of the oil flow between the pressure oil cavity and the oil return cavity can be effectively and stably controlled.
The second embodiment is as follows: the present embodiment is described with reference to fig. 1, and differs from the specific embodiment in that a fourth seal 12 is provided at an interface where a pilot oil passage 13 communicates with a pilot oil pipe of an integrated block 16. Other compositions and connection modes are the same as in the first embodiment.
And a third specific embodiment: the present embodiment is described with reference to fig. 1, and one difference between the present embodiment and the specific embodiment is that the fourth seal member 12 is an O-ring seal. Other compositions and connection modes are the same as those of the first or second embodiment.
The specific embodiment IV is as follows: the present embodiment is different from the specific embodiment in that a process hole for machining the pilot oil passage 13 is provided at the right end of the cover plate 1, and a process hole plug 11 is installed in the process hole, as described with reference to fig. 1. The function of arranging the process holes is to facilitate processing. Other compositions and connection modes are the same as any one of the first to third embodiments.
Fifth embodiment: the fourth difference between the present embodiment and the specific embodiment is that a fifth seal 10 is provided between the process hole and the process hole stopper 11, which is described with reference to fig. 1. Other compositions and connection modes are the same as any one of the first to fourth embodiments.
Specific embodiment six: the fifth embodiment is different from the fifth embodiment in that the fifth seal 10 is an O-ring seal, which is described with reference to fig. 1. Other compositions and connection modes are the same as those of any one of the first to fifth embodiments.
Seventh embodiment: the present embodiment is described with reference to fig. 1, and one point of difference from the specific embodiment is that the cover plate 1 and the integrated block 16 are screwed by the screw 2. Other compositions and connection modes are the same as those of any one to six of the embodiments.
Eighth embodiment: the present embodiment is described with reference to fig. 1, and is different from the seventh embodiment in that a spring washer 3 is provided between a cover plate 1 and a screw 2. Other compositions and connection modes are the same as those of any one of the first to seventh embodiments.
Detailed description nine: the present embodiment is described with reference to fig. 1, and one difference between the present embodiment and the specific embodiment is that the first sealing member 9, the second sealing member 4, and the third sealing member 6 are O-ring seals. Other compositions and connection modes are the same as those of any one of the first to eighth embodiments.
The principle of the utility model is explained in connection with fig. 1 to 4: by adopting the plug-in type two-way valve principle, three sealing surfaces of the DUMP valve which are originally required to be ground oppositely are simplified into one sealing surface, so that the processing and manufacturing difficulty is reduced, and the reliability of the structure is improved. The pilot control oil enters a pilot control oil cavity between the cover plate and the valve core through a pilot control oil channel, pushes the valve core to the bottom end of the valve seat, and further seals a pressure oil channel between the pressure oil inlet and the pressure oil outlet.
The present utility model has been described in terms of preferred embodiments, but is not limited to the utility model, and any equivalent embodiments can be made by those skilled in the art without departing from the scope of the utility model, as long as the equivalent embodiments are possible using the above-described structures and technical matters.
Claims (9)
1. The plug-in type unloading valve device is characterized by comprising a valve seat (5), a valve core (7), a spring (8), a first sealing piece (9), a second sealing piece (4), a third sealing piece (6), a pilot control oil channel (13), a pressure oil inlet (14), a pressure oil outlet (15) and a cover plate (1);
The valve seat (5) is internally lined on an integrated block (16) of an external oil motor, a first sealing piece (9) is arranged at the contact part between the lower part of the valve seat (5) and the integrated block (16), a pressure oil inlet (14) is arranged at the bottom of the valve seat (5), a pressure oil outlet (15) is arranged on the right side of the valve seat (5), a valve core (7) is inserted in the valve seat (5), the valve core (7) is in sliding connection with the inner wall of the valve seat (5), a cover plate (1) is arranged at the top of the valve seat (5), a second sealing piece (4) is arranged between the cover plate (1) and the valve seat (5), a third sealing piece (6) is arranged between the cover plate (1) and the integrated block (16), a spring (8) is arranged in the valve core (7), the upper end and the lower end of the spring (8) are fixedly connected with the cover plate (1) and the valve core (7) respectively, a pilot control oil channel (13) is horizontally processed in the middle part of the cover plate (1), the pilot control oil channel (13) is communicated with the control oil cavity (16) of the integrated block (5), pilot oil is pushed to the bottom end of the valve seat (7) through the pilot oil channel (7) and the pilot oil enters the pilot oil channel (7) to the valve seat (7), realizing the sealing of a pressure oil channel between the pressure oil inlet (14) and the pressure oil outlet (15).
2. A cartridge unloading valve arrangement according to claim 1, characterized in that the interface of the pilot oil channel (13) with the pilot oil pipe of the manifold block (16) is provided with a fourth seal (12).
3. A cartridge unloader valve device according to claim 2, wherein the fourth seal (12) is an O-ring seal.
4. A cartridge unloading valve device according to any one of claims 1-3, characterized in that the right end of the cover plate (1) is provided with a process hole for machining the pilot oil channel (13), which process hole is provided with a process hole plug (11).
5. A cartridge unloading valve arrangement according to claim 4, characterized in that a fifth sealing element (10) is arranged between the process orifice and the process orifice plug (11).
6. A cartridge unloading valve arrangement according to claim 5, characterized in that the fifth sealing element (10) is an O-ring seal.
7. A cartridge unloading valve arrangement according to claim 1, characterized in that the cover plate (1) and the integrated block (16) are screwed together by means of screws (2).
8. A cartridge unloading valve arrangement according to claim 7, characterized in that a spring washer (3) is arranged between the cover plate (1) and the screw (2).
9. A cartridge unloading valve arrangement according to any of claims 1-3, 5-8, characterized in that the first sealing element (9), the second sealing element (4) and the third sealing element (6) are O-ring seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323187481.5U CN220979985U (en) | 2023-11-24 | 2023-11-24 | Plug-in mounting type unloading valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323187481.5U CN220979985U (en) | 2023-11-24 | 2023-11-24 | Plug-in mounting type unloading valve device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220979985U true CN220979985U (en) | 2024-05-17 |
Family
ID=91036113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323187481.5U Active CN220979985U (en) | 2023-11-24 | 2023-11-24 | Plug-in mounting type unloading valve device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220979985U (en) |
-
2023
- 2023-11-24 CN CN202323187481.5U patent/CN220979985U/en active Active
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