Unloading safety valve for hydraulic turbine governor oil pressure device
By designing a unloading safety valve for the hydraulic pressure device of the turbine speed controller, using the pressure mechanism of the unloading pipe and rubber sheet, the problem of the valve disc cannot be closed tightly in the prior art, and the spring force reduction is achieved The security and practicality of the leakage can still be improved.
Patent Information
- Application Number
- CN202420964324.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-07
AI Technical Summary
After the use time of the existing unloading safety valve increases, the spring force decreases, resulting in the valve disc being unable to close tightly, and leakage may occur, which poses a certain risk.
A unloading safety valve for the hydraulic pressure device of the turbine speed controller is designed. By connecting the unloading pipe to the hydraulic pressure device, the valve stem is twisted to drive the lifting plate downward, so that the valve disc is tightly fitted to the unloading. The upper surface of the pipe, when the pressure is too high, the valve flap is pushed open, and the pressure is discharged through the gap between the valve flap and the unloading tube. When the pressure is restored, the spring rebounds to make the valve close to each other, and the pressure mechanism of the rubber sheet and the connecting rod is used to ensure the valve. The flap can still close tightly when the spring force decreases.
It effectively avoids valve leakage, improves the safety and practicality of use, ensures that the valve disc can still be closed tightly when the spring force is reduced, and enhances the safety of the system.
Smart Images
Figure CN222255171U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of safety valves, in particular to a load relief safety valve for an oil pressure device of a turbine speed governor. Background Art
[0002] The unloading safety valve is a pressure control valve, also known as a pressure relief valve or a safety valve. Its function is to monitor the pressure in the hydraulic system and when the set pressure value is reached, the liquid will flow back to the oil tank or unload the hydraulic system through another circuit to protect the safe operation of the system. The unloading safety valve is widely used in the field of navigation, especially in the hydraulic device of the turbine speed governor. The unloading safety valve plays a role of pressure control and has a very important influence on the safe operation of the hydraulic device of the turbine speed governor. This is the unloading safety valve used for the hydraulic device of the turbine speed governor;
[0003] Some existing safety valves use the elastic force of a spring to press the valve disc against the top of the pressure relief pipe. However, as the service time increases, the elastic force of the spring gradually decreases, and the valve disc may not be able to close tightly against the pressure relief pipe after it falls, resulting in valve leakage, which is dangerous. Therefore, an unloading safety valve for a turbine governor oil pressure device is proposed. Utility Model Content
[0004] The utility model aims to provide a unloading safety valve for a hydraulic device of a turbine speed governor to solve the problems raised in the above-mentioned background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a unloading safety valve for a turbine speed governor oil pressure device, comprising a valve body, a valve cover is fixedly connected to the upper surface of the valve body, a valve stem is threadedly connected to the upper surface of the valve cover, a lifting plate is rotatably connected to the lower surface of the valve stem, a sleeve is fixedly connected to the lower surface of the lifting plate, a sleeve rod is slidably connected to the inner side wall of the sleeve, a valve disc is fixedly connected to the lower surface of the sleeve rod, a spring is fixedly connected between the upper surface of the valve disc and the sleeve, a sealing gasket is fixedly connected to the lower surface of the valve disc, and an unloading safety valve is fixedly connected to the lower surface of the valve body. Tube, the upper surface of the unloading tube is in close contact with the lower surface of the sealing gasket, two air pressure tubes are symmetrically welded to the lower surface of the valve body, the air pressure tubes extend to the interior of the valve body, and two first connecting rods are symmetrically welded to the lower surface of the valve disc, the first connecting rod passes through the upper surface of the air pressure tube and is fixedly connected to a first rubber sheet, the lower surface of the air pressure tube is movably contacted with a second connecting rod, the second connecting rod passes through the lower surface of the air pressure tube and is fixedly connected to a second rubber sheet, and the outer side walls of the first rubber sheet and the second rubber sheet are in close contact with the inner side wall of the air pressure tube.
[0006] As a further preferred embodiment of the technical solution: a first groove is formed on the inner side wall of the lifting plate, a second groove is formed on the outer side wall of the valve stem, and balls are evenly arranged between the first groove and the second groove.
[0007] As a further preferred embodiment of the technical solution: two guide cylinders are symmetrically welded on the lower surface of the valve cover, two guide rods are symmetrically welded on the upper surface of the lifting plate, and the inner wall of the guide cylinder is slidably connected to the outer wall of the guide rod.
[0008] As a further preferred embodiment of the present technical solution: a sealing ring is provided between the lower surface of the valve cover and the upper surface of the valve body, the upper surface of the valve cover is threadedly connected with bolts, and the valve cover and the valve body are fixedly connected by the bolts.
[0009] As a further preferred embodiment of the present technical solution: a turntable is fixedly connected to the upper surface of the valve stem.
[0010] As a further preferred embodiment of the present technical solution: a handle is fixedly connected to the lower surface of the second connecting rod.
[0011] As a further preferred embodiment of the technical solution: a flange is welded to the outer side wall of the unloading pipe, and flange holes are evenly opened on the outer side wall of the flange.
[0012] As a further preferred embodiment of the present technical solution: a right surface of the valve body is connected to a unloading port.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] The utility model connects the unloading pipe with the oil pressure device of the turbine speed governor, and twists the valve stem to drive the lifting plate to move downward, so that the valve disc below is closely fitted on the upper surface of the unloading pipe. When the pressure in the oil pressure device is too high, the pressure will push the valve disc open, and the valve disc drives the first connecting rod and the first rubber sheet to move upward. Since the first rubber sheet and the second rubber sheet are in close contact with the inner wall of the air pressure pipe, the pressure between the first rubber sheet and the second rubber sheet drives the second rubber sheet and the second connecting rod to move upward. At this time, the spring is squeezed by the sleeve and the valve disc, and the sleeve rod slides toward the sleeve. The pressure passes through the valve The clearance between the valve disc and the unloading pipe is discharged. When the pressure in the oil pressure device returns to a safe level, the rebound force of the spring drives the valve disc and the sealing gasket to move downward, pulling the second connecting rod to drive the second rubber sheet to move downward. The pressure between the second rubber sheet and the first rubber sheet drives the first rubber sheet and the second connecting rod to move downward. The second connecting rod drives the valve disc and the sealing gasket to fit tightly against the upper surface of the unloading pipe. When the elastic force of the spring gradually decreases, the valve disc can also be tightly closed between the unloading pipe after it falls, thereby avoiding leakage of the valve, improving the safety of use, and being more practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;
[0016] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;
[0017] Figure 3 It is a cross-sectional structural schematic diagram of the unloading pipe and the air pressure pipe in the utility model;
[0018] Figure 4 It is a cross-sectional structural schematic diagram of the lifting plate in the utility model;
[0019] Figure 5 For the utility model Figure 4 A magnified schematic diagram of area A.
[0020] In the figure: 1. valve body; 2. valve cover; 3. valve stem; 4. lifting plate; 5. sleeve; 6. sleeve rod; 7. valve disc; 8. spring; 9. sealing gasket; 10. unloading pipe; 11. air pressure pipe; 12. first connecting rod; 13. first rubber sheet; 14. second connecting rod; 15. second rubber sheet; 16. first groove; 17. second groove; 18. ball; 19. guide cylinder; 20. guide rod; 21. sealing ring; 22. bolt; 23. turntable; 24. handle; 25. flange; 26. flange hole; 27. unloading port. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limitations on the present application. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0022] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0023] See also Figure 1-5 The utility model provides a technical solution: a unloading safety valve for a turbine speed governor oil pressure device, comprising a valve body 1, a valve cover 2 is fixedly connected to the upper surface of the valve body 1, a valve stem 3 is threadedly connected to the upper surface of the valve cover 2, a lifting plate 4 is rotatably connected to the lower surface of the valve stem 3, a sleeve 5 is fixedly connected to the lower surface of the lifting plate 4, a sleeve rod 6 is slidably connected to the inner side wall of the sleeve 5, a valve flap 7 is fixedly connected to the lower surface of the sleeve rod 6, a spring 8 is fixedly connected between the upper surface of the valve flap 7 and the sleeve 5, a sealing gasket 9 is fixedly connected to the lower surface of the valve body 1 The surface is fixedly connected with a relief pipe 10, and the upper surface of the relief pipe 10 is in close contact with the lower surface of the sealing gasket 9. Two air pressure pipes 11 are symmetrically welded to the lower surface of the valve body 1, and the air pressure pipes 11 extend to the inside of the valve body 1. Two first connecting rods 12 are symmetrically welded to the lower surface of the valve flap 7, and the first connecting rods 12 penetrate the upper surface of the air pressure pipe 11 and are fixedly connected with a first rubber sheet 13. The lower surface of the air pressure pipe 11 is movably contacted with a second connecting rod 14, and the second connecting rod 14 penetrates the lower surface of the air pressure pipe 11 and is fixedly connected with a second rubber sheet 15. The outer walls of the first rubber sheet 13 and the second rubber sheet 15 are in close contact with the inner wall of the air pressure tube 11; the unloading tube 10 is connected to the oil pressure device of the turbine speed governor, and the valve stem 3 is turned to drive the lifting plate 4 to move downward, so that the valve flap 7 below is closely attached to the upper surface of the unloading tube 10. When the pressure in the oil pressure device is too high, the pressure will push the valve flap 7 open, and the valve flap 7 drives the first connecting rod 12 and the first rubber sheet 13 to move upward. Since the first rubber sheet 13 and the second rubber sheet 15 are in close contact with the inner wall of the air pressure tube 11, the pressure belt between the first rubber sheet 13 and the second rubber sheet 15 is The second rubber sheet 15 and the second connecting rod 14 are driven to move upward. At this time, the spring 8 is squeezed by the sleeve 5 and the valve disc 7, and the sleeve rod 6 slides toward the sleeve 5. The pressure is discharged through the gap between the valve disc 7 and the unloading pipe 10. When the pressure in the oil pressure device returns to a safe level, the rebound force of the spring 8 drives the valve disc 7 and the sealing gasket 9 to move downward, and pulls the second connecting rod 14 to drive the second rubber sheet 15 to move downward. The pressure between the second rubber sheet 15 and the first rubber sheet 13 drives the first rubber sheet 13 and the second connecting rod 14 to move downward. The second connecting rod 14 drives the valve disc 7 and the sealing gasket 9 to fit tightly against the upper surface of the unloading pipe 10.
[0024] In this embodiment, specifically: the inner wall of the lifting plate 4 is provided with a first groove 16, the outer wall of the valve stem 3 is provided with a second groove 17, and balls 18 are evenly arranged between the first groove 16 and the second groove 17; so that the valve stem 3 and the lifting plate 4 are rotatably connected.
[0025] In this embodiment, specifically: two guide cylinders 19 are symmetrically welded to the lower surface of the valve cover 2, and two guide rods 20 are symmetrically welded to the upper surface of the lifting plate 4, and the inner wall of the guide cylinder 19 is slidably connected to the outer wall of the guide rod 20; so that the lifting plate 4 does not rotate with the rotation of the valve stem 3, but keeps moving up and down in the direction of the guide cylinder 19 and the guide rod 20.
[0026] In this embodiment, specifically: a sealing ring 21 is provided between the lower surface of the valve cover 2 and the upper surface of the valve body 1 , a bolt 22 is threadedly connected to the upper surface of the valve cover 2 , and the valve cover 2 and the valve body 1 are fixedly connected by the bolt 22 .
[0027] In this embodiment, specifically: a turntable 23 is fixedly connected to the upper surface of the valve stem 3 to facilitate the rotation of the valve stem 3 .
[0028] In this embodiment, specifically: a handle 24 is fixedly connected to the lower surface of the second connecting rod 14 to facilitate pulling the second connecting rod 14 .
[0029] In this embodiment, specifically: a flange 25 is welded to the outer wall of the unloading pipe 10, and flange holes 26 are evenly opened on the outer wall of the flange 25, so as to facilitate connection with the hydraulic device of the turbine governor.
[0030] In this embodiment, specifically: the right surface of the valve body 1 is connected with a relief port 27 to facilitate the discharge of pressure from the valve body 1 .
[0031] The working principle of the utility model is: the unloading pipe 10 is connected to the oil pressure device of the turbine speed governor, and the valve stem 3 is twisted to drive the lifting plate 4 to move downward, so that the valve flap 7 below is closely attached to the upper surface of the unloading pipe 10. When the pressure in the oil pressure device is too high, the pressure will push the valve flap 7 open, and the valve flap 7 drives the first connecting rod 12 and the first rubber sheet 13 to move upward. Since the first rubber sheet 13 and the second rubber sheet 15 are in close contact with the inner wall of the air pressure pipe 11, the pressure between the first rubber sheet 13 and the second rubber sheet 15 drives the second rubber sheet 15 and the second connecting rod 14 to move upward. At this time, the spring 8 is squeezed by the sleeve 5 and the valve flap 7, and the sleeve rod 6 slides toward the sleeve 5. The pressure passes through the valve flap 7 and the unloading pipe 10. The gap is discharged, and when the pressure in the oil pressure device returns to a safe level, the rebound force of the spring 8 drives the valve disc 7 and the sealing gasket 9 to move downward, and pulls the second connecting rod 14 to drive the second rubber sheet 15 to move downward. The pressure between the second rubber sheet 15 and the first rubber sheet 13 drives the first rubber sheet 13 and the second connecting rod 14 to move downward, and the second connecting rod 14 drives the valve disc 7 and the sealing gasket 9 to fit tightly on the upper surface of the unloading pipe 10, thereby constituting an unloading safety valve for the oil pressure device of the turbine governor. When the elastic force of the spring 8 gradually decreases, the valve disc 7 can also be tightly closed between the unloading pipe 10 after falling, thereby avoiding leakage of the valve, improving the safety of use, and being more practical.
[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A unloading safety valve for a turbine speed governor oil pressure device, comprising a valve body (1), characterized in that: The upper surface of the valve body (1) is fixedly connected to a valve cover (2), the upper surface of the valve cover (2) is threadedly connected to a valve stem (3), the lower surface of the valve stem (3) is rotatably connected to a lifting plate (4), the lower surface of the lifting plate (4) is fixedly connected to a sleeve (5), the inner side wall of the sleeve (5) is slidably connected to a sleeve rod (6), the lower surface of the sleeve rod (6) is fixedly connected to a valve flap (7), a spring (8) is fixedly connected between the upper surface of the valve flap (7) and the sleeve (5), a sealing gasket (9) is fixedly connected to the lower surface of the valve flap (7), and a relief pipe (10) is fixedly connected to the lower surface of the valve body (1), and the upper surface of the relief pipe (10) is tightly connected to the lower surface of the sealing gasket (9). The valve body (1) is symmetrically welded with two air pressure tubes (11) on the lower surface, and the air pressure tubes (11) extend into the interior of the valve body (1). The valve flap (7) is symmetrically welded with two first connecting rods (12) on the lower surface, and the first connecting rods (12) penetrate the upper surface of the air pressure tube (11) and are fixedly connected with a first rubber sheet (13). The lower surface of the air pressure tube (11) is movably contacted with a second connecting rod (14), and the second connecting rod (14) penetrates the lower surface of the air pressure tube (11) and is fixedly connected with a second rubber sheet (15). The outer side walls of the first rubber sheet (13) and the second rubber sheet (15) are in close contact with the inner side wall of the air pressure tube (11).
2. The unloading safety valve for the hydraulic device of a turbine speed governor according to claim 1 is characterized in that: The inner wall of the lifting plate (4) is provided with a first groove (16), the outer wall of the valve stem (3) is provided with a second groove (17), and balls (18) are evenly arranged between the first groove (16) and the second groove (17).
3. The unloading safety valve for the hydraulic device of the turbine speed governor according to claim 2 is characterized in that: Two guide cylinders (19) are symmetrically welded on the lower surface of the valve cover (2), and two guide rods (20) are symmetrically welded on the upper surface of the lifting plate (4), and the inner wall of the guide cylinder (19) is slidably connected to the outer wall of the guide rod (20).
4. The unloading safety valve for the hydraulic device of a turbine speed governor according to claim 2 is characterized in that: A sealing ring (21) is provided between the lower surface of the valve cover (2) and the upper surface of the valve body (1), and a bolt (22) is threadedly connected to the upper surface of the valve cover (2), and the valve cover (2) and the valve body (1) are fixedly connected by the bolt (22).
5. The unloading safety valve for the hydraulic device of a turbine speed governor according to claim 2, characterized in that: A rotating disk (23) is fixedly connected to the upper surface of the valve stem (3).
6. The unloading safety valve for the hydraulic device of a turbine speed governor according to claim 2, characterized in that: A handle (24) is fixedly connected to the lower surface of the second connecting rod (14).
7. The unloading safety valve for the hydraulic device of a turbine speed governor according to claim 6, characterized in that: A flange (25) is welded to the outer wall of the unloading pipe (10), and flange holes (26) are evenly arranged on the outer wall of the flange (25).
8. The unloading safety valve for the hydraulic device of a turbine speed governor according to claim 6, characterized in that: The right surface of the valve body (1) is connected to a load relief port (27).