SGF accident distributing valve
By introducing protective components and overspeed protection components into the SGF accident pressure distribution valve, the problems of loose parts connections and untimely response are solved, the safety and flexibility of the device are improved, rapid connection and accident handling are achieved, and safety is enhanced strength.
Patent Information
- Application Number
- CN202420891131.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-26
AI Technical Summary
During use, there is no protective mechanism at the parts connection during the existing SGF accident pressure distribution valve, which leads to gaps and looseness, affects the fixing effect, poses safety hazards, and does not respond in time when the accident occurs, and has great limitations in use.
A SGF accident pressure distribution valve including protective components and overspeed protection components in the valve body is designed. The parts are sealed and quickly responded through structures such as bushings, valve cores, upper covers and stroke fingers, which increases the safety of the device. and flexibility.
It effectively reduces the gaps in parts, improves the stability and safety of the device, realizes rapid connection and accident handling, and enhances the safety strength and convenience of the device.
Smart Images
Figure CN222141649U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of valves, and in particular relates to an SGF emergency pressure regulating valve. Background Art
[0002] When a low oil pressure accident occurs in the hydro-turbine generator set, or the governor fails to close the water diversion mechanism, the speed of the hydro-turbine generator set will be too high. These situations are likely to cause safety accidents. In view of this, it is necessary to design an SGF emergency pressure regulating valve.
[0003] The utility model with publication number CN205559155U includes a valve body, which is mounted on a bracket, an auxiliary control piston and a main piston are sequentially mounted in the valve body, an integrated flange is mounted on one end of the valve body and is arranged adjacent to the auxiliary control piston, a control solenoid valve and a hydraulic control valve are arranged on the upper end surface of the valve body, a speed adjustment knob is integrated and mounted on the integrated flange and is coaxially arranged with the auxiliary control piston and the main piston, a stroke indicator rod is embedded in the speed adjustment knob and one end of the stroke indicator rod is connected to the auxiliary control piston, and a feedback switch is mounted on the integrated flange and is in contact with the other end of the stroke indicator rod. The utility model is used in hydropower stations with medium and low pressure speed regulation systems.
[0004] However, the above patent still has the following problems: during the use of the emergency pressure-regulating valve, no protective mechanism is set at the joints of the parts, gaps are prone to appear at the joints of the parts, affecting the fixing effect of the pressure-regulating valve. When the internal pressure of the valve body is too high, the parts are prone to loosening. The use of the device has limitations and there are safety hazards. Utility Model Content
[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:
[0006] An SGF emergency pressure regulating valve comprises a valve body 10, wherein a protection component and an overspeed protection component are arranged inside the valve body 10; the protection component comprises a bushing 16 arranged inside the valve body 10, and a protection structure is arranged on the outer wall of the bushing 16; the overspeed protection component comprises a valve core 15 arranged inside the valve body 10, and an overspeed protection structure is arranged outside the valve core 15, and the protection component also comprises an upper cover 11 arranged outside the valve body 10.
[0007] Compared with the prior art, the utility model has the following beneficial effects:
[0008] 1. To achieve the purpose of sealing and protecting the device body, reduce the gaps between parts, improve the safety of the device, prevent the parts from loosening or gaps from appearing during use, which may affect the safety of the device, and improve the stability of the device.
[0009] 2. To achieve the purpose of quick connection of the device and quick response to accidents, and to improve the flexibility of the device. When the pressure oil source loses pressure, the valve core 15 of the device moves under the action of the differential pressure and the spring, and the valve is reversed. Accidents are quickly handled through the device, and the safety of the device is improved.
[0010] 3. To achieve automatic or manual speed reduction protection for valves that have accidents, improve the convenience of using the device, facilitate the staff to monitor and control the device in real time, improve the safety of using the device, and improve the safety strength of the device.
[0011] 4. High degree of integration, small size, light weight, small installation space, easy installation and debugging; throttling device is used to adjust the closing time; accurate, stable and reliable action; all components on this valve are connected by plate-type plug-in, with good sealing performance and easy maintenance and debugging.
[0012] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In the attached picture:
[0014] Figure 1 It is a front view of the utility model;
[0015] Figure 2 It is a cross-sectional view of the utility model;
[0016] Figure 3 It is a right side view of the utility model;
[0017] Figure 4 It is a left view of the utility model;
[0018] Figure 5 It is the AA front view of the utility model;
[0019] Figure 6 This is a schematic diagram of the hydraulic system of the utility model.
[0020] In the figure: 10, valve body; 11, upper cover; 12, lower cover; 13, travel finger; 14, travel switch; 15, valve core; 16, bushing; 17, fixing plate; 18, pressure oil source interface; 19, first return oil interface; 20, relay opening end interface; 21, relay closing end interface; 22, solenoid pilot valve; 23, regulating valve; 24, support plate; 25, first return oil port; 26, second return oil port; 27, speed regulator opening end interface; 28, speed regulator closing end interface; 29, oil pipeline; 30, third oil connection port; 31, fourth oil connection port; 32, fifth oil connection port; 33, threaded hole. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.
[0022] Embodiment 1: An SGF emergency pressure regulating valve, specifically Figure 1 and 2 As shown, the package includes a valve body 10, wherein a protection component and an overspeed protection component are arranged inside the valve body 10; the protection component includes a bushing 16 arranged inside the valve body 10, and a protection structure is arranged on the outer wall of the bushing 16; the overspeed protection component includes a valve core 15 arranged inside the valve body 10, and an overspeed protection structure is arranged outside the valve core 15, and the protection component also includes an upper cover 11 arranged outside the valve body 10. The internal parts of the device are protected and reinforced by the protection component, and the device is protected from overspeed by the overspeed protection component.
[0023] Specific as Figure 1 , Figure 2 and Figure 5 As shown, the protective structure includes a lower cover 12 arranged at the bottom of the valve body 10, the bottom of the upper cover 11 is tightly attached to the top of the valve body 10, the top of the lower cover 12 is tightly attached to the bottom of the valve body 10, the upper cover 11, the lower cover 12 are connected to the valve body 10 in a plate-like manner, and four groups of threaded holes 33 are opened on the outer wall of the lower cover 12. The inner wall of the valve body 10 is sealed by the bushing 16, and the upper and lower sides of the valve body 10 are sealed by the upper cover 11 and the lower cover 12.
[0024] According to the above, through the structure of the upper cover 11, the lower cover 12, the travel finger 13, the travel switch 14, the valve core 15, the bushing 16 and the threaded hole 33, the purpose of sealing and protecting the device body is achieved, the gaps between the parts are reduced, the safety of the device is improved, the parts are prevented from loosening or gaps appearing during the use of the device, which affects the safety of the device, and the stability of the device is improved.
[0025] Embodiment 2: Based on Embodiment 1, the specific Figure 1 , Figure 2 and Figure 3 As shown, the overspeed protection structure includes a fixing plate 17 fixedly mounted on the top of the upper cover 11, two sets of travel switches 14 are fixedly mounted on one side outer wall of the fixing plate 17, a hole is opened on the top of the upper cover 11, and a travel finger rod 13 is fixedly mounted in the hole; one end of the travel finger rod 13 is connected to the travel switch 14, and the other end of the travel finger rod 13 extends into the valve core 15 and is fixed. Here, the travel switch 14 is supported by the fixing plate 17.
[0026] Specific as Figure 1 , Figure 2 and Figure 3As shown, the overspeed protection assembly also includes four groups of holes opened on the outer wall of the valve body 10, and the pressure oil source interface 18, the first return oil interface 19, the relay opening end interface 20 and the relay closing end interface 21 are fixedly installed in the holes.
[0027] The valve body 10 is connected to an external device through the pressure oil source interface 18 , the first oil return interface 19 , the servomotor opening end interface 20 and the servomotor closing end interface 21 .
[0028] According to the above conclusions, through the structure of the upper cover 11, the travel finger 13, the travel switch 14, the valve core 15, the fixing plate 17, the pressure oil source interface 18, the first return oil interface 19, the relay opening end interface 20 and the relay closing end interface 21, the purpose of quickly connecting the device and quickly responding to accidents is achieved, and the flexibility of the device is improved. When the pressure oil source loses pressure, the valve core 15 of the device moves under the action of the differential pressure and the spring, and the valve is reversed. The accident is quickly handled by the device, and the safety of the device is improved.
[0029] Embodiment 3: Based on Embodiment 1 and Embodiment 2, the specific Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, two groups of holes are opened on the outer wall of the valve body 10, and a group of speed regulator opening end interfaces 27 and a group of speed regulator closing end interfaces 28 are fixedly installed in the holes respectively. The output end of the speed regulator opening end interface 27 is connected to the speed regulator closing, and the output end of the speed regulator closing end interface 28 is connected to the speed regulator opening.
[0030] Specific as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the output end of the pressure oil source interface 18 is connected to the servomotor off, the output end of the first return oil interface 19 is connected to the servomotor on, the output end of the servomotor opening end interface 20 is connected to the emergency oil source, and the output end of the servomotor closing end interface 21 is connected to the return oil. The valve body is connected to external equipment through the pressure oil source interface 18, the first return oil interface 19, the servomotor opening end interface 20, the servomotor closing end interface 21, the speed governor opening end interface 27 and the speed governor closing end interface 28. The pressure oil passes through the pressure oil source interface 18, the electromagnetic pilot valve 22 and the regulating valve 23 to the lower end of the SGF emergency pressure regulating valve. The valve core 15 is in the upper position under the action of the differential pressure. At this time, the SGF emergency pressure regulating valve is in normal working condition. The servomotor opening end interface 20 is connected to the opening chamber of the servomotor, and the servomotor closing end interface 21 is connected to the closing chamber of the servomotor. The unit is in normal working condition. Speed regulation is achieved by operating the servomotor through the main pressure regulating valve of the speed regulator; when the turbine generator set has an accident with low oil pressure, or the speed regulator fails to close the water diversion mechanism, resulting in excessive speed of the turbine generator set, the pure mechanical hydraulic overspeed protector is activated, and the pressure oil source loses pressure, the valve core 15 of the SGF accident pressure regulating valve moves under the action of the differential pressure and the spring, the valve is reversed, the control circuit of the speed regulator is cut off, the opening chamber of the servomotor is connected to the return oil, the closing chamber of the servomotor is connected to the pressure oil source, and the servomotor of the water diversion mechanism of the turbine closes the valve under the action of the pressure oil, thereby realizing the overspeed shutdown of the turbine and avoiding the unit from running away.
[0031] Specific as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, a support plate 24 is fixedly installed on the outer wall of the valve body 10, and two groups of holes are opened on the top of the support plate 24, and a group of first return oil ports 25 and a group of third return oil ports 30 are fixedly installed in the holes; a solenoid pilot valve 22 is fixedly installed on the front side of the first return oil port 25, and a group of second return oil ports 26 are fixedly installed at both ends of the solenoid pilot valve 22; a regulating valve 23 is fixedly installed at the bottom of the solenoid pilot valve 22, and an oil delivery pipe 29 is fixedly installed at one end of the regulating valve 23, and one end of the oil delivery pipe 29 extends and is fixedly installed inside the valve body 10. The solenoid pilot valve 22 and the regulating valve 23 are fixed by the support plate 24.
[0032] Specific as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, a group of slots are provided inside the valve body 10, and a group of fourth oil receiving ports 31 are fixedly installed inside the slots. A hole is provided on the outer wall of the upper cover 11, and a fifth oil receiving port 32 is fixedly installed inside the hole. The pressure and oil inside the valve body are transmitted through the first return oil port 25, the second return oil port 26, the oil pipeline 29, the third oil receiving port 30, the fourth oil receiving port 31 and the fifth oil receiving port 32. When the staff finds that the unit is working abnormally in the central control room or on site, they can directly send an action remote control instruction to the electromagnetic pilot valve 22 from the central control room or manually operate the electromagnetic pilot valve 22 on site; by adjusting the opening of the regulating valve, the return oil flow rate in the accident state can be adjusted to set the action time of the SGF accident pressure regulating valve, and play a hydraulic buffering role, overcoming the huge roaring sound caused by the valve core 15 hitting the end cover when the SGF accident pressure regulating valve is actuated, and by adjusting the opening of the regulating valve, the closing speed of the relay can be adjusted, thereby controlling the closing time of the water turbine water guide mechanism.
[0033] In summary, through the structure of the electromagnetic pilot valve 22, the regulating valve 23, the support plate 24, the first return oil port 25, the second return oil port 26, the speed regulator opening end interface 27, the speed regulator closing end interface 28, the oil pipeline 29, the third oil receiving port 30, the fourth oil receiving port 31 and the fifth oil receiving port 32, the valve in an accident can be automatically or manually controlled to reduce the speed for protection, the convenience of using the device is improved, the staff can monitor and control the device in real time, the safety of using the device is improved, and the safety strength of the device is improved.
[0034] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.
Claims
1. An SGF emergency pressure regulating valve, characterized in that: The invention comprises a valve body (10), wherein a protection component and an overspeed protection component are arranged inside the valve body (10); the protection component comprises a bushing (16) arranged inside the valve body (10), and a protection structure is arranged on the outer wall of the bushing (16); the overspeed protection component comprises a valve core (15) arranged inside the valve body (10), and an overspeed protection structure is arranged outside the valve core (15); the protection component also comprises an upper cover (11) arranged outside the valve body (10).
2. The SGF emergency pressure regulating valve according to claim 1 is characterized in that: The protective structure comprises a lower cover (12) arranged at the bottom of the valve body (10), the bottom of the upper cover (11) is tightly attached to the top of the valve body (10), the top of the lower cover (12) is tightly attached to the bottom of the valve body (10), the upper cover (11), the lower cover (12) and the valve body (10) are connected in a plate-like manner, and four groups of threaded holes (33) are provided on the outer wall of the lower cover (12).
3. The SGF emergency pressure regulating valve according to claim 1 is characterized in that: The overspeed protection structure comprises a fixing plate (17) fixedly mounted on the top of the upper cover (11); two groups of travel switches (14) are fixedly mounted on an outer wall of one side of the fixing plate (17); a hole is provided on the top of the upper cover (11); a travel finger rod (13) is fixedly mounted in the hole; one end of the travel finger rod (13) is connected to the travel switch (14); the other end of the travel finger rod (13) extends into the valve core (15) and is fixed.
4. The SGF emergency pressure regulating valve according to claim 3 is characterized in that: The overspeed protection component also includes four groups of holes formed on the outer wall of the valve body (10), in which a pressure oil source interface (18), a first oil return interface (19), a servomotor opening end interface (20) and a servomotor closing end interface (21) are respectively fixedly mounted.
5. The SGF emergency pressure regulating valve according to claim 4 is characterized in that: Two groups of holes are formed on the outer wall of the valve body (10), and a group of speed regulator opening end interfaces (27) and a group of speed regulator closing end interfaces (28) are fixedly installed in the holes respectively. The output end of the speed regulator opening end interface (27) is connected to the speed regulator closing end, and the output end of the speed regulator closing end interface (28) is connected to the speed regulator opening end.
6. The SGF emergency pressure regulating valve according to claim 4 is characterized in that: The output end of the pressure oil source interface (18) is connected to the servomotor off, the output end of the first return oil interface (19) is connected to the servomotor on, the output end of the servomotor on-end interface (20) is connected to the emergency oil source, and the output end of the servomotor off-end interface (21) is connected to the return oil.
7. The SGF emergency pressure regulating valve according to claim 1 is characterized in that: A support plate (24) is fixedly mounted on the outer wall of the valve body (10); two groups of holes are formed on the top of the support plate (24); a group of first return oil ports (25) and a group of third return oil ports (30) are fixedly mounted in the holes; an electromagnetic pilot valve (22) is fixedly mounted on the front side of the first return oil port (25); and a group of second return oil ports (26) are fixedly mounted on both ends of the electromagnetic pilot valve (22); a regulating valve (23) is fixedly mounted on the bottom of the electromagnetic pilot valve (22); an oil delivery pipe (29) is fixedly mounted on one end of the regulating valve (23); and one end of the oil delivery pipe (29) extends and is fixedly mounted inside the valve body (10).
8. The SGF emergency pressure regulating valve according to claim 1 is characterized in that: The valve body (10) has a group of slots formed inside, and a group of fourth oil receiving ports (31) are fixedly installed inside the slots. The outer wall of the upper cover (11) has holes formed on it, and a fifth oil receiving port (32) is fixedly installed inside the holes.