Speed regulating system of oil supply device of power plant

Abstract

A speed regulating system of a power plant oil supply device effectively solves the problems that in an energy accumulator protection assembly of an existing oil supply system, cost is high, and universality is not high. Comprising an oil supply pipeline arranged on a supporting platform, a plurality of valve seats which are connected in series are arranged on the oil supply pipeline, two energy accumulators which are symmetrically distributed are fixed to the tops of the valve seats, the energy accumulators are communicated with the valve seats, and pressure gauges are arranged on the valve seats; the energy accumulator clamping device is ingenious in structure and convenient to use, through the arrangement of the installation frame, the sliding block, the arc-shaped clamping jaws and the like, a worker only needs to rotate the handle, the two arc-shaped clamping jaws get close to each other to clamp an energy accumulator, the arc-shaped clamping jaws fix the energy accumulator, meanwhile, the sliding base has a buffering effect on the energy accumulator under the action of the spring, and therefore the energy accumulator can be clamped conveniently. Compared with an existing protection assembly, the mode can aim at the energy storage unit with two energy accumulators as one set, vibration protection of the two energy accumulators can be achieved only through one protection assembly, and the universality of the protection assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil supply speed regulation systems, in particular to a speed regulation system for an oil supply device in a power plant. Background Art

[0002] Oil supply speed regulation in power plants, especially in power plants that use steam turbines as prime movers, refers to the regulation process of the oil supply system that provides working fluid (usually steam) to the steam turbines in order to control the speed of the steam turbines.

[0003] Steam turbine speed control systems are mainly divided into two categories: electronic speed control and oil pressure speed control.

[0004] Oil pressure speed regulation is a more traditional regulation method, which uses the change of oil pressure to control the steam intake of the steam turbine, thereby adjusting the speed. In the system, the oil motor responds to the signal from the speed governor to adjust the opening of the steam valve (such as the main steam valve and the regulating steam valve), thereby controlling the steam flow entering the steam turbine.

[0005] In the oil pressure speed control system, the accumulator plays an important role in stabilizing the oil pressure in the system.

[0006] The Chinese patent with application number CN202222887255.7 discloses an anti-wear accumulator, including a stable base, the upper four corners of the stable base are respectively bolted with support columns with holes, the upper and lower inner parts of the support columns with holes are respectively plugged with push rods with holes, the ends of the push rods with holes are installed with buffer connection seat assemblies, the ends of the buffer connection seat assemblies are fixed with accumulator positioner assemblies, the inner side of the accumulator positioner assemblies are placed with hydraulic accumulators, the accumulator positioner assemblies include accumulator fixing splints, and the inner side of the accumulator fixing splints is provided with positioning grooves. The beneficial effects of the utility model are: through the arrangement of the accumulator fixing splints, positioning grooves, anti-slip rubber pads, limiting protrusions and moving balls, it is beneficial to fix the hydraulic accumulator and limit the hydraulic accumulator at the same time, preventing the hydraulic accumulator from detaching from the fixed position.

[0007] The Chinese patent with application number CN202121003183.4 discloses an anti-wear accumulator, including an accumulator body and a support frame arranged at the bottom of the accumulator body, side protection mechanisms are arranged on both sides of the surface of the support frame, and a bottom support mechanism is arranged at the bottom of the inner wall of the support frame. The side protection mechanism includes a fixing plate, and the internal thread of the fixing plate is connected with a threaded rod, and the end of the threaded rod located on one side of the fixing plate is rotatably connected with a rubber protective cover. The utility model relates to the technical field of accumulators. The anti-wear accumulator can protect the accumulator body by providing buffer support to the bottom of the accumulator body and fixing the two sides. At the same time, it can be adjusted according to the size of the accumulator when clamping the side, which increases the scope of application. While stably fixing, it can effectively avoid wear on the surface of the accumulator body, laying a foundation for the normal use of the subsequent accumulator body.

[0008] The existing accumulators still have the following problems:

[0009] 1. Components to prevent accumulator wear are usually used to protect a single accumulator. However, in oil plants, accumulators are basically grouped in two, and multiple groups are set up to stabilize the pipeline. If each accumulator is installed with a protective component separately, it will not only be inconvenient to install, but also costly, and the universality of the component is not high.

[0010] 2. For accumulators of different diameters, the protective components are generally adaptively controlled by the elastic force of the spring. When the diameter of the accumulator is very small, the elastic force of the spring will weaken the protection of the accumulator, and the protective strength cannot be adjusted according to accumulators of different diameters. Utility Model Content

[0011] In view of the above problems, the present invention provides a speed control system for an oil supply device of a power plant, which has the advantage that a single protection component is used to protect two accumulators.

[0012] The technical solution is that the utility model comprises an oil supply pipeline placed on a supporting platform, a plurality of valve seats connected in series are arranged on the oil supply pipeline, two symmetrically distributed accumulators are fixed on the tops of the plurality of valve seats, the accumulators are connected to the valve seats, and a pressure gauge is arranged on the valve seats;

[0013] A mounting frame located between the two accumulators is fixed on the top of the valve seat, and vertical grooves are provided on both sides of the mounting frame, and a limit rod is fixed in the vertical groove, and a slide seat that slides up and down is provided on the limit rod, and the slide seat is connected to the vertical groove by a spring, and a connecting platform is fixed on the side of the slide seat away from the vertical groove, and a double-headed screw is rotatably connected to the connecting platform, and a handle is provided in the middle of the double-headed screw, and sliders are threadedly connected to the two ends of the double-headed screw, and a clamping arm is fixed on the top of the slider, and an arc-shaped clamping claw is fixed on the end of the clamping arm away from the slider, and clamping grooves staggered up and down are provided on the two matching arc-shaped clamping claws;

[0014] The handle is provided with a plurality of limiting holes evenly distributed around the circumference, and a limiting pin penetrating the connecting platform is inserted into one of the limiting holes.

[0015] Preferably, the limit rod is provided with an adjustment plate located above the slide seat, the adjustment plate is connected to the slide seat by a spring, an adjustment slot is provided on the top of the mounting frame, a connecting block passing through the adjustment slot is fixed between two adjacent adjustment plates, an adjustment rod is coaxially rotated in the adjustment slot, and the connecting block is connected to the adjustment rod by threads.

[0016] Preferably, the interior of the accumulator is an airbag structure.

[0017] Preferably, a shock-absorbing pad is provided on the contact surface between the arc-shaped clamping jaw and the accumulator.

[0018] Preferably, a support frame is provided between adjacent valve seats, and the support frame is fixed on a support platform.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. Through the installation of the mounting frame, the slider and the arc-shaped clamping claw, the worker only needs to turn the handle, and the two arc-shaped clamping claws will approach each other to clamp the accumulator. After the clamping is completed, when the accumulator has shaking potential energy, the arc-shaped clamping claw will fix the accumulator, and the slide seat will also have a buffering effect on the accumulator under the action of the spring. Compared with the existing protection components, this method can be used for energy storage units with two accumulators as a group. Only one protection component is needed to achieve vibration protection of the two accumulators, which improves the universality of the protection components.

[0021] 2. Through the settings of the adjustment plate, adjustment slot and adjustment rod, for accumulators with different diameters, workers can turn the adjustment rod to adjust the distance between the adjustment plate and the slide. The smaller the diameter of the accumulator, the smaller the distance between the adjustment plate and the slide. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a diagram of the oil supply circuit system of the utility model.

[0023] Figure 2 It is a structural schematic diagram of the accumulator and the connecting piece in the utility model.

[0024] Figure 3 It is a schematic diagram of the mounting frame and the connecting piece in the utility model.

[0025] Figure 4 It is a structural schematic diagram of the arc-shaped clamping jaws in the utility model.

[0026] Figure 5 It is a schematic diagram of the adjusting rod and the connecting piece in the utility model.

[0027] Figure 6 It is a schematic diagram of the connecting block and the connecting piece in the utility model.

[0028] Explanation of the symbols in the schematic diagram:

[0029] 1. Support platform; 2. Oil supply pipeline; 3. Valve seat; 4. Accumulator; 5. Pressure gauge; 6. Mounting frame; 7. Vertical slot; 8. Limit rod; 9. Sliding seat; 10. Connecting platform; 11. Double-headed screw; 12. Handle; 13. Sliding block; 14. Clamping arm; 15. Arc-shaped clamping claw; 16. Limit hole; 17. Limit pin; 18. Adjustment plate; 19. Connecting block; 20. Adjustment rod; 21. Support frame. DETAILED DESCRIPTION

[0030] 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. 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 creative work are within the scope of protection of the utility model.

[0031] Depend on Figures 1 to 4 It is given, including an oil supply pipeline 2 placed on a supporting platform 1, and a plurality of valve seats 3 connected in series are arranged on the oil supply pipeline 2, and two symmetrically distributed accumulators 4 are fixed on the top of the plurality of valve seats 3, and the accumulator 4 is communicated with the valve seat 3, and a pressure gauge 5 is arranged on the valve seat 3. The valve seat 3 is a prior art, and the valve seat 3 is used as an interface to physically connect the accumulator 4 and the oil supply pipeline 2 to ensure the sealing and stability of the oil circuit. At the same time, a plurality of valves such as stop valves, one-way valves, etc. are arranged inside the valve seat 3, which can control the flow direction and flow rate of the oil between the accumulator 4 and the pipeline, which is particularly important when the system requires rapid response, pressure compensation or pump switching operations. The valve seat 3 has many functions, which will not be described in detail here;

[0032] Taking into account that the accumulator 4 may shake during use due to the influence of various factors, such as: pulsation of the hydraulic system, external vibration source, unstable gas-liquid interface, installation problems or characteristics of hydraulic oil, etc., various factors may cause the accumulator 4 to vibrate. The existing protection equipment for the accumulator 4 is basically protected separately, which is not only inconvenient to install and costly, but also reduces the universality of the protection component. A mounting frame 6 located between the two accumulators 4 is fixed on the top of the valve seat 3, and vertical grooves 7 are provided on both sides of the mounting frame 6. A limit rod 8 is fixed in the vertical groove 7, and a slide 9 that slides up and down is provided on the limit rod 8. The slide 9 is connected to the vertical groove 7 by a spring, and a connecting platform 10 is fixed on the side of the slide 9 away from the vertical groove 7. A double-headed screw 11 is rotatably connected to the connecting platform 10, and a handle 12 is provided in the middle of the double-headed screw 11. Slide blocks 1 are threadedly connected to both ends of the double-headed screw 11 3. A clamping arm 14 is fixed on the top of the slider 13, and an arc-shaped clamping claw 15 is fixed on the end of the clamping arm 14 away from the slider 13. The two matching arc-shaped clamping claws 15 are provided with clamping grooves staggered up and down. The two matching arc-shaped clamping claws 15 are crossed with each other to adapt to the clamping of accumulators 4 of different diameters. Through the installation of the mounting frame 6, the slider 13 and the arc-shaped clamping claws 15, the worker only needs to turn the handle 12, and the two arc-shaped clamping claws 15 are close to each other to clamp the accumulator 4. After the clamping is completed, when the accumulator 4 has shaking potential energy, the arc-shaped clamping claw 15 fixes the accumulator 4, and the slide seat 9 also has a buffering effect on the accumulator 4 under the action of the spring. Compared with the existing protective components, this method can be used for an energy storage unit with two accumulators 4 as a group. Only one protective component is needed to achieve vibration protection of the two accumulators 4, thereby improving the universality of the protective component.

[0033] Taking into account the situation that the handle 12 is easy to reverse when vibrating, resulting in insufficient clamping force of the arc-shaped clamping claw 15 on the accumulator 4, a plurality of circumferentially evenly distributed limiting holes 16 are opened through the handle 12, and a limiting pin 17 passing through the connecting platform 10 is inserted into one of the limiting holes 16. When the handle 12 stops rotating, the worker can insert the limiting pin 17 into the limiting hole 16 to fix the handle 12.

[0034] refer to Figure 5 and Figure 6As shown, considering that for accumulators 4 of different diameters, the protection component is generally adaptively operated by the elastic force of the spring. When the diameter of the accumulator 4 is very small, the elastic force of the spring will weaken the protection of the accumulator 4, and the protection strength cannot be adjusted according to the accumulators 4 of different diameters. The limit rod 8 is provided with an adjustment plate 18 located above the slide 9, and the adjustment plate 18 is connected to the slide 9 by a spring. An adjustment groove is provided on the top of the mounting frame 6, and a connecting block 19 penetrating the adjustment groove is fixed between two adjacent adjustment plates 18. An adjustment rod 20 is coaxially rotated in the adjustment groove, and the connecting block 19 is connected to the adjustment rod 20 by threads. Through the arrangement of the adjustment plate 18, the adjustment groove and the adjustment rod 20, for accumulators 4 of different diameters, the worker can rotate the adjustment rod 20 to adjust the distance between the adjustment plate 18 and the slide 9. The smaller the diameter of the accumulator 4, the smaller the distance between the adjustment plate 18 and the slide 9.

[0035] Furthermore, the interior of the accumulator 4 is an airbag structure.

[0036] In order to prevent the surface of the accumulator 4 from being rigidly damaged when the arc-shaped clamping jaws 15 clamp the accumulator 4 , a shock-absorbing pad is provided on the contact surface between the arc-shaped clamping jaws 15 and the accumulator 4 .

[0037] refer to Figure 2 and Figure 3 As shown, it should be further supplemented that a support frame 21 is provided between adjacent valve seats 3 , and the support frame 21 is fixed on the support platform 1 .

[0038] When the utility model is used:

[0039] First, install the mounting frame 6 in the middle of the valve seat 3. Before fixing the mounting frame 6, adjust the arc-shaped clamping jaw 15 to the farthest distance and insert the arc-shaped clamping jaw 15 from the top of the accumulator 4. When the two accumulators 4 are respectively located in the arc-shaped clamping jaws 15 on both sides of the mounting frame 6, fix the mounting frame 6 and the valve seat 3.

[0040] Then, the handle 12 is turned, and the two arc-shaped clamping jaws 15 are close to each other to clamp the accumulator 4. After the clamping is completed, when the accumulator 4 has shaking potential energy, the arc-shaped clamping jaws 15 fix the accumulator 4, and the slide seat 9 also has a buffering effect on the accumulator 4 under the action of the spring;

[0041] Secondly, when the handle 12 has finished rotating, the worker can insert the limit pin 17 into the limit hole 16 to fix the handle 12;

[0042] Finally, for accumulators 4 with different diameters, the worker can rotate the adjustment rod 20 to adjust the distance between the adjustment plate 18 and the slide 9. The smaller the diameter of the accumulator 4, the smaller the distance between the adjustment plate 18 and the slide 9.

[0043] 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 speed control system for an oil supply device in a power plant, comprising an oil supply pipeline (2) placed on a supporting platform (1), characterized in that: The oil supply pipeline (2) is provided with a plurality of valve seats (3) connected in series with each other, two symmetrically distributed accumulators (4) are fixed on the top of the plurality of valve seats (3), the accumulators (4) are in communication with the valve seats (3), and a pressure gauge (5) is provided on the valve seats (3); A mounting frame (6) located between the two accumulators (4) is fixed on the top of the valve seat (3), and vertical grooves (7) are provided on both sides of the mounting frame (6). A limit rod (8) is fixed in the vertical groove (7), and a sliding seat (9) that slides up and down is provided on the limit rod (8). The sliding seat (9) is connected to the vertical groove (7) by a spring, and a connecting platform (10) is fixed on the side of the sliding seat (9) away from the vertical groove (7). A double-headed screw (11) is rotatably connected to the connecting platform (10), and a handle (12) is provided in the middle of the double-headed screw (11). Slide blocks (13) are threadedly connected to the two ends of the double-headed screw (11), and a clamping arm (14) is fixed on the top of the slide block (13). An arc-shaped clamping claw (15) is fixed on the end of the clamping arm (14) away from the slide block (13), and two matching arc-shaped clamping claws (15) are provided with clamping grooves that are staggered up and down; The handle (12) is provided with a plurality of limiting holes (16) evenly distributed around the circumference, and a limiting pin (17) penetrating the connecting platform (10) is inserted into one of the limiting holes (16).

2. The speed control system of a power plant oil supply device according to claim 1, characterized in that: The limit rod (8) is provided with an adjustment plate (18) located above the slide seat (9), the adjustment plate (18) is connected to the slide seat (9) via a spring, an adjustment slot is provided on the top of the mounting frame (6), a connecting block (19) penetrating the adjustment slot is fixed between two adjacent adjustment plates (18), an adjustment rod (20) is coaxially rotated in the adjustment slot, and the connecting block (19) is connected to the adjustment rod (20) via a thread.

3. The speed control system of a power plant oil supply device according to claim 1, characterized in that: The interior of the accumulator (4) is an airbag structure.

4. The speed control system of a power plant oil supply device according to claim 1, characterized in that: The contact surface between the arc-shaped clamping jaw (15) and the energy accumulator (4) is provided with a shock-absorbing pad.

5. The speed control system of a power plant oil supply device according to claim 1, characterized in that: A support frame (21) is provided between adjacent valve seats (3), and the support frame (21) is fixed on the support platform (1).

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