High-pressure regulating valve for steam turbine

Abstract

The present invention relates to the technical field of regulating valves, and in particular to a high-pressure regulating valve for a steam turbine, comprising: a pressure valve body, comprising an outer assembly and an inner assembly provided in the outer assembly; a pressure measurement component, comprising port measurement assemblies provided at two ends of the outer assembly and a variable measurement assembly provided in the inner assembly; and a regulating component, comprising a flow regulating assembly provided at a port of the outer assembly and a pressure limiting assembly provided on the outer assembly. In the present invention, the pressure measurement component is provided in the high-pressure regulating valve, so that the positions of pressure sensing probes connected to the variable measurement assembly can be adjusted on the basis of the flow rate, flow velocity and pressure of a flowing medium, so as to accurately regulate the pressure of the flowing medium; and the pressure and flow rate of an incoming medium are initially regulated at an inlet, and with the monitoring assistance of front and rear pressure gauges, a valve core enables precise control of the medium flow pressure.

Description

A high-pressure regulating valve for steam turbine TECHNICAL FIELD

[0001] The present application relates to the technical field of regulating valve, in particular to a high-pressure regulating valve for steam turbine. BACKGROUND

[0002] The steam turbine is a kind of steam-driven power equipment, when steam flows in the equipment, the pressure of high-temperature steam flow can be regulated by high-pressure regulating valve, so as to regulate the mechanical energy of steam turbine, the high-pressure regulating valve has strong corrosion resistance, and is suitable for transmitting some special medium, and is installed according to the arrow direction of medium flow during assembly and use;

[0003] However, the existing part of the high-pressure regulating valve is inconvenient to detect the pressure of inlet and outlet during use, the pressure difference of regulating valve inlet and outlet is large, which affects the stability and safety of regulating valve assembly and use, and also affects the service life of regulating valve, and in the case of large medium flow, the high-pressure regulating valve is difficult to accurately regulate the medium flow pressure at one time, and the outlet flowing medium may need to be regulated again, which affects the transmission of steam turbine.

[0004] SUMMARY

[0005] This part is to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part and the abstract and title of the specification to avoid obscuring the purpose of this part, the abstract and the title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0006] In view of the above problem that the medium flow pressure cannot be accurately regulated, the present application is proposed.

[0007] Therefore, the purpose of the present application is to provide a high-pressure regulating valve for steam turbine.

[0008] To solve the above technical problems, the present application provides the following technical scheme: a high-pressure regulating valve for steam turbine, comprising a pressure valve body, an external component, an internal component arranged in the external component; a pressure measuring component, comprising a port measuring component arranged at both ends of the external component, and a variable measuring component arranged in the internal component; an adjusting component, comprising a flow adjusting component arranged at the port of the external component, and a pressure limiting component arranged on the external component.

[0009] As a preferred scheme of the high-pressure regulating valve for steam turbine, wherein: the external component comprises a valve body, a valve rod arranged on the valve body, a stroke pointer arranged on the valve rod, stroke scales arranged at both ends of the stroke pointer, a support frame arranged on the valve body, and a pressure diaphragm chamber arranged at the top end of the support frame.

[0010] As a preferred scheme of the steam turbine high-pressure regulating valve, the inner component comprises a valve seat arranged in the valve body, a valve core arranged in the valve seat, and a flexible seal arranged on the lower surface of the valve core.

[0011] As a preferred scheme of the steam turbine high-pressure regulating valve, the port measuring component comprises a front pressure gauge arranged at the input end of the valve body, a rear pressure gauge arranged at the output end of the valve body, and a movable pressure gauge arranged between the front pressure gauge and the rear pressure gauge.

[0012] As a preferred scheme of the steam turbine high-pressure regulating valve, the variable measuring component comprises a sliding groove arranged in the valve body, a lead screw arranged in the sliding groove, a sliding rod arranged in the sliding groove, and a sliding sleeve sleeved on the lead screw and the sliding rod.

[0013] As a preferred scheme of the steam turbine high-pressure regulating valve, the sliding groove is arranged in the valve body in an up-down manner, the upper sliding groove is rotationally connected with the lead screw, the lower sliding groove is fixedly connected with the sliding rod, the sliding sleeve is arranged in two, one of the sliding sleeves is threadedly connected with the lead screw, and the other sliding sleeve is slidingly connected with the sliding rod.

[0014] As a preferred scheme of the steam turbine high-pressure regulating valve, the variable measuring component further comprises a connecting rod arranged on the sliding sleeve and a plurality of pressure sensing probes arranged on the connecting rod.

[0015] As a preferred scheme of the steam turbine high-pressure regulating valve, the flow regulating component comprises a regulating sheet arranged at the input end of the valve body and a spherical filter screen arranged on the regulating sheet.

[0016] As a preferred scheme of the steam turbine high-pressure regulating valve, the pressure limiting component comprises a pressure control chamber arranged at the lower part of the valve body, a pressure column arranged in the pressure control chamber, and an arc-shaped filter screen arranged on the pressure column.

[0017] As a preferred scheme of the steam turbine high-pressure regulating valve, the pressure limiting component further comprises a movable sheet arranged at the bottom end of the pressure column, a fixed sheet arranged at the bottom of the pressure control chamber, and an electromagnetic block arranged on the movable sheet and the fixed sheet.

[0018] The beneficial effects of the present application are as follows: the present application sets a pressure measuring component in the high-pressure regulating valve, adjusts the position of the pressure sensing probe connected to the variable measuring assembly according to the flow, flow rate and pressure of the flowing medium, controls the rotation of the screw rod through the micro driver, controls the left and right movement of the pressure sensing probe inside the valve body under the action of the threaded transmission structure, adjusts the sensing detection position of the moving pressure gauge, and assists in analyzing the pressure of the flowing medium inside the regulating valve, so as to accurately regulate it; and the adjusting piece can adjust the flow cross-section size of the valve body inlet, so as to preliminarily regulate the pressure and flow rate of the entering medium at the inlet, and accurately control the medium flow pressure through the valve core under the auxiliary detection of the front and rear pressure gauges. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Fig. 1 is a schematic diagram of a steam turbine high-pressure regulating valve.

[0021] Fig. 2 is a schematic diagram of the cross section of a steam turbine high-pressure regulating valve in an open valve core state.

[0022] Fig. 3 is a schematic diagram of the cross section of a steam turbine high-pressure regulating valve in a closed valve core state.

[0023] Fig. 4 is a schematic diagram of the structure of a variable measuring assembly of a steam turbine high-pressure regulating valve.

[0024] Fig. 5 is a schematic diagram of a flow regulating assembly of a steam turbine high-pressure regulating valve.

[0025] Fig. 6 is a schematic diagram of the structure of an arc surface filter screen of a steam turbine high-pressure regulating valve.

[0026] Fig. 7 is a schematic diagram of a pressure limiting assembly of a steam turbine high-pressure regulating valve. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0028] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0029] Second, the "one embodiment" or "an embodiment" referred to herein means a specific feature, structure, or characteristic under discussion. Each of the various embodiments presented in this specification are not necessarily all mutually exclusive alternatives from another. It should be understood that that the text used herein is intended to describe the embodiments presented and is not intended to limit the scope of the application.

[0030] Third, the present application is described in detail with reference to the accompanying drawings. In the detailed description of the embodiments of the present application, the cross-sectional view of the device structure is partially enlarged without the general proportion for the convenience of explanation, and the schematic diagram is only an example which should not limit the scope of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual manufacture.

[0031] Embodiment 1

[0032] Referring to FIGS. 1-4, a first embodiment of the present application provides a steam turbine high-pressure regulating valve, which includes a pressure valve body 100, including an external component 101, an internal component 102 arranged in the external component 101; a pressure measuring component 200, including a port measuring component 201 arranged at both ends of the external component 101, and a variable measuring component 202 arranged in the internal component 102; a regulating component 300, including a flow regulating component 301 arranged at the port of the external component 101, and a pressure limiting component 302 arranged on the external component 101.

[0033] Specifically, the external component 101 mainly includes a valve body 101a, and the internal component 102 mainly includes a valve seat 102a and a valve core 102b. The valve body 101a is provided with a flow passage for the medium to flow. The port measuring component 201 is arranged at both ends of the valve body 101a for detection. The pressure measuring component 200 is arranged in the valve body 101a and can detect the flow pressure of the flowing medium at multiple points. The regulating component 300 is controlled according to the measured pressure data to adjust the cross-sectional area of the inlet of the valve body 101a and the opening degree of the valve core 102b, so as to adjust the flow pressure of the medium output by the valve body 101a. Each electric control component and measuring component of the device is electrically connected with the external control circuit for power supply and electric control.

[0034] Referring to FIG. 2, the port measuring component 201 includes a front pressure gauge 201a arranged at the input end of the valve body 101a, a rear pressure gauge 201b arranged at the output end of the valve body 101a, and a moving pressure gauge 201c arranged between the front pressure gauge 201a and the valve core 102b. The front pressure gauge 201a and the rear pressure gauge 201b detect the flow pressure data of the medium at the input end and the output end of the pressure valve, respectively. The moving pressure gauge 201c detects the flow pressure data of the medium after being regulated by the flow regulating component 301.

[0035] Referring to FIG. 4, the variable measurement assembly 202 includes a sliding groove 202a formed in the valve body 101a, a lead screw 202b arranged in the sliding groove 202a, a sliding rod 202c arranged in the sliding groove 202a, and a sliding sleeve 202d sleeved on the lead screw 202b and the sliding rod 202c.

[0036] Specifically, the sliding groove 202a is provided with two upper and lower sliding grooves 202a, the upper sliding groove 202a is rotationally connected with the lead screw 202b, the lower sliding groove 202a is fixedly connected with the sliding rod 202c, the sliding sleeve 202d is provided with two sliding sleeves 202d, one sliding sleeve 202d is threadedly connected with the lead screw 202b, and the other sliding sleeve 202d is slidingly connected with the sliding rod 202c, one end of the lead screw 202b is drivingly connected with a micro drive, the rotation of the lead screw 202b is controlled by the micro drive, the rotation of the lead screw 202b can drive the sliding sleeve 202d to move along the lead screw 202b, the axis of the lead screw 202b is parallel to the axis of the sliding rod 202c and is in the same plane, and the two sliding sleeves 202d are fixedly connected by a connecting rod 202e, so as to be movable forward and backward.

[0037] Further, the variable measurement assembly 202 further includes a connecting rod 202e arranged on the sliding sleeve 202d, and a plurality of pressure sensing probes 202f arranged on the connecting rod 202e, both ends of the connecting rod 202e are fixedly connected with the two sliding sleeves 202d, so as to be movable forward and backward along the lead screw 202b, the pressure sensing probes 202f are installed on the outside of the connecting rod 202e and are electrically connected with the mobile pressure gauge 201c through a waterproof cable, according to the flow velocity, flow rate and initial pressure of the medium in the valve body 101a, the medium at different positions in the valve body 101a is pressure detected by the three groups of pressure gauges, so as to adjust the flow pressure of the output medium by the valve core 102b and the flow regulating assembly 301.

[0038] Operation process: first, the front pressure gauge 201a and the rear pressure gauge 201b can detect the pressure of the medium flowing in and out of the valve body 101a at the fixed position, so as to analyze the pressure difference of the medium in the regulating valve;

[0039] Secondly, the position of the pressure sensing probe 202f corresponding to the valve body 101a can detect the pressure of the medium flowing in the valve body 101a, the rotation of the lead screw 202b is controlled by the micro drive, the sliding sleeve is controlled to slide on the outside of the sliding rod 202c under the action of the threaded transmission structure of the lead screw 202b and the internal threaded column, the part of the transmission structure can control the pressure sensing probe 202f to move in the valve body 101a, so as to detect the pressure of the medium flowing at different positions in the valve body 101a, so as to accurately control the medium flow in the subsequent process.

[0040] Embodiment 2

[0041] Referring to FIGS. 5-7, for the second embodiment of the application, which is different from the first embodiment, the flow regulating assembly 301 includes a regulating piece 301a arranged at the input end of the valve body 101a. The regulating piece 301a is a circular piece, the size of the regulating piece 301a is adapted to the size of the flow channel of the valve body 101a, the position of the regulating piece 301a is between the front pressure gauge 201a and the moving pressure gauge 201c, and the regulating piece 301a is controlled to open and close by a micro driver, according to the different rotation angles, the cross-sectional area of the entering flow channel is changed, so that the pressure and flow of the medium entering the regulating valve are preliminarily limited, and the valve core 102b is accurately adjusted for the subsequent medium flow.

[0042] Specifically, the pressure limiting assembly 302 includes a pressure control chamber 302a arranged at the lower part of the valve body 101a, a pressure column 302b arranged in the pressure control chamber 302a, an arc filter screen 302c arranged on the pressure column 302b, the top end of the pressure column 302b is fixedly connected with the center of the valve core 102b, and moves synchronously with the valve core 102b when the valve core 102b moves up and down, when the valve core 102b is opened, the arc filter screen 302c can cover the communication part to filter the medium, a spherical filter screen 301b arranged on the regulating piece 301a can filter the medium at the inlet of the regulating valve, and the double filtering structure can effectively filter the impurities in the flowing medium.

[0043] Further, the pressure limiting assembly 302 further includes a movable piece 302d arranged at the bottom end of the pressure column 302b, a fixed piece 302e arranged at the bottom of the pressure control chamber 302a, and electromagnetic blocks 302f arranged on the movable piece 302d and the fixed piece 302e, the size and shape of the movable piece 302d and the fixed piece 302e are adapted to the pressure control chamber 302a, the movable piece 302d moves with the pressure column 302b, each electromagnetic block 302f is electrically connected with an external control circuit, the pressure control chamber 302a is sealed with the valve body 101a, and the pressure column 302b is slidingly connected with the pressure control chamber 302a.

[0044] The remaining structures are the same as those of the first embodiment.

[0045] Operation process: Since the speed of the movement of the valve core 102b affects the initial flow speed of the medium, the medium flows rapidly under the action of pressure, and a large impact force is generated on the inside of the regulating valve, the speed of the movement of the valve core 102b can be adjusted by the pressure limiting assembly 302, the regulating valve is stably used, the number of energized blocks of the electromagnetic blocks 302f on the surfaces of the fixed piece 302e and the movable piece 302d is controlled, the magnetic attraction force between the fixed piece 302e and the movable piece 302d is adjusted, and under the magnetic attraction, the movement speed of the valve core 102b is adjusted, so that the valve core 102b is prevented from moving too fast in the regulating valve and affecting the stable use of the regulating valve.

[0046] Embodiment 3

[0047] Referring to FIG. 1-6, for the third embodiment of the present application, which is different from the above embodiments, the external component 101 includes a valve body 101a, a valve stem 101b disposed on the valve body 101a, a stroke pointer 101c disposed on the valve stem 101b, a stroke scale 101d disposed on both ends of the stroke pointer 101c, a support frame 101e disposed on the valve body 101a, and a pressure diaphragm chamber 101f disposed on the top end of the support frame 101e.

[0048] Specifically, the valve stem 101b penetrates into the valve body 101a to connect the valve core 102b, and the opening and closing of the valve core 102b is controlled by lifting the valve stem 101b, the valve stem 101b drives the stroke pointer 101c to lift synchronously when lifting, the stroke pointer 101c judges the opening and closing condition of the valve core 102b by referring to the stroke scale 101d on both sides, the stroke scale 101d is disposed on the support frame 101e, the support frame 101e is installed with the pressure diaphragm chamber 101f on the top end, and the pressure diaphragm chamber 101f controls the valve stem 101b.

[0049] Further, the internal component 102 includes a valve seat 102a disposed in the valve body 101a, a valve core 102b disposed in the valve seat 102a, and a flexible seal 102c disposed on the lower surface of the valve core 102b, the valve seat 102a is used to accommodate the valve core 102b, the valve core 102b can close the valve body 101a to block the medium flow, and the flexible seal 102c increases the contact surface between the valve core 102b and the valve seat 102a, which can better maintain the sealing effect after long-term use.

[0050] The remaining structures are the same as those of Embodiment 2.

[0051] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Thus, the foregoing description is by way of example only, and is not intended to be limiting. The application is limited only as defined in the following claims and equivalents thereto. The sequence of any process or method steps, or the order in which they are carried out, can be altered or re-ordered without departing from the scope of the application. Any "articles of manufacture" or "manufacturing" as described herein are intended to encompass structures constructed of a multitude of different physical elements or components. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and also cover structures yet to be invented which perform the recited function but operate in a different manner. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the application as expressed in the appended claims.

[0052] Also, to provide a concise description of the exemplary embodiments, not all features of an actual implementation can be described (that is, not all implementations can include all of the features described or optional implementations can include only a subset of the features described).

[0053] It should be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0054] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the present application, and all should be included in the scope of the claims of the present application.

Claims

1. A steam turbine high pressure control valve characterized by: Comprising, a pressure valve body (100) comprising an outer assembly (101), an inner assembly (102) arranged in the outer assembly (101); a pressure measuring component (200) comprising a port measuring assembly (201) arranged at both ends of the outer assembly (101), a variable measuring assembly (202) arranged in the inner assembly (102); an adjusting component (300) comprising a flow adjusting assembly (301) arranged at the port of the outer assembly (101), a pressure limiting assembly (302) arranged on the outer assembly (101).

2. The steam turbine high pressure control valve of claim 1, wherein: The outer assembly (101) comprises a valve body (101a), a valve stem (101b) arranged on the valve body (101a), a stroke pointer (101c) arranged on the valve stem (101b), a stroke scale (101d) arranged at both ends of the stroke pointer (101c), a support frame (101e) arranged on the valve body (101a), and a pressure diaphragm chamber (101f) arranged at the top end of the support frame (101e).

3. The steam turbine high pressure control valve of claim 2, wherein: The inner assembly (102) comprises a valve seat (102a) arranged in the valve body (101a), a valve core (102b) arranged in the valve seat (102a), and a flexible seal (102c) arranged on the lower surface of the valve core (102b).

4. The steam turbine high pressure control valve of claim 3, wherein: The port measuring assembly (201) comprises a front pressure gauge (201a) arranged at the input end of the valve body (101a), a rear pressure gauge (201b) arranged at the output end of the valve body (101a), and a movable pressure gauge (201c) arranged between the front pressure gauge (201a) and the rear pressure gauge (201b).

5. The steam turbine high pressure control valve of claim 4, wherein: The variable measuring assembly (202) comprises a sliding groove (202a) opened in the valve body (101a), a lead screw (202b) arranged in the sliding groove (202a), a sliding rod (202c) arranged in the sliding groove (202a), and a sliding sleeve (202d) sleeved on the lead screw (202b) and the sliding rod (202c).

6. The steam turbine high pressure control valve of claim 5, wherein: The sliding groove (202a) is arranged in the valve body (101a) in an up-down manner, the upper sliding groove (202a) is rotatably connected with the lead screw (202b), the lower sliding groove (202a) is fixedly connected with the sliding rod (202c), and the sliding sleeve (202d) is provided with two, one of which is threadedly connected with the lead screw (202b), and the other is slidably connected with the sliding rod (202c).

7. The steam turbine high pressure control valve of claim 6, wherein: The variable measuring assembly (202) further comprises a connecting rod (202e) arranged on the sliding sleeve (202d) and a plurality of pressure sensing probes (202f) arranged on the connecting rod (202e).

8. The steam turbine high pressure control valve of claim 4 or 7, wherein: The flow adjusting assembly (301) comprises an adjusting piece (301a) arranged at the input end of the valve body (101a) and a spherical filter screen (301b) arranged on the adjusting piece (301a).

9. The steam turbine high pressure control valve of claim 8, wherein: The pressure limiting assembly (302) comprises a pressure control chamber (302a) arranged at the lower part of the valve body (101a), a pressure column (302b) arranged in the pressure control chamber (302a), and an arc surface filter screen (302c) arranged on the pressure column (302b).

10. The steam turbine high pressure control valve of claim 9, wherein: The pressure limiting assembly (302) further comprises a movable piece (302d) arranged at the bottom end of the pressure column (302b), a fixed piece (302e) arranged at the bottom of the pressure control chamber (302a), and an electromagnetic block (302f) arranged on the movable piece (302d) and the fixed piece (302e).

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