Control valve with characteristics of high temperature resistance and high pressure resistance

Abstract

The utility model discloses a control valve with the characteristics of high temperature resistance and high pressure resistance, and belongs to the technical field of control valves. The control valves are respectively arranged on the high-pressure turbine steam inlet pipeline and the medium-pressure turbine steam inlet pipeline; the control valve comprises a power mechanism and an adjusting mechanism, and the power mechanism is connected with the adjusting mechanism; the adjusting mechanism is provided with a steam inlet and a steam outlet. According to the utility model, high-pressure steam and medium-pressure steam can be completely blocked, so that the high-pressure steam wasted by maintenance is reduced while the maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a control valve with high temperature and high pressure resistance characteristics. Background Art

[0002] The high-pressure steam intake control valve of the synthesis gas compressor's high-pressure turbine steam pipeline leaks, causing the turbine temperature to be high after the compressor is shut down. The lubricating oil system needs to continue running to cool it down. If the compressor turbine fails and needs maintenance, the turbine cannot be repaired alone.

[0003] The high-pressure steam intake control valve of the synthesis gas compressor high-pressure turbine steam pipeline leaked internally. When the high-pressure turbine of the compressor failed and the production system was partially shut down for maintenance, the lubricating oil system ran 24 hours a day to cool down the compressor turbine temperature. The compressor turbine temperature was maintained at 270°C and maintenance work could not be carried out. Finally, the entire production system was shut down and the high-pressure steam was completely withdrawn. Maintenance work was carried out only after the temperature dropped to normal temperature, which greatly delayed the progress of maintenance and seriously affected the production capacity of the production system. For this reason, steam control valves were developed and installed on the high-pressure steam and medium-pressure steam pipelines respectively to completely block the high-pressure and medium-pressure steam, facilitate maintenance, and reduce the waste of steam caused by maintenance. Utility Model Content

[0004] In view of the defects of the prior art, the utility model provides a control valve with high temperature and high pressure resistance characteristics. When the compressor turbine fails and needs maintenance, it can completely block the high-pressure and medium-pressure steam, which facilitates maintenance and reduces the high-pressure steam wasted due to maintenance.

[0005] To achieve the above object, the utility model provides a control valve with high temperature and high pressure resistance, the control valve is respectively arranged on the high-pressure turbine steam inlet pipeline and the medium-pressure turbine steam inlet pipeline; the control valve includes a power mechanism and a regulating mechanism, the power structure and the regulating mechanism are connected;

[0006] The regulating mechanism is provided with a steam inlet and a steam outlet.

[0007] Furthermore, the steam outlet end of the valve body is in an inverted trapezoidal shape.

[0008] Furthermore, the regulating mechanism comprises a valve body, a steam inlet and a steam outlet are respectively arranged on the valve body, a valve core is arranged in the valve body, and a sealing surface of the valve core for sealing the steam outlet is arc-shaped.

[0009] Furthermore, the sealing surface and the steam outlet end of the valve core are made of composite materials.

[0010] Furthermore, the composite material consists of graphite and mica materials.

[0011] Furthermore, the power mechanism includes a hydraulic cylinder and a control mechanism, and the control mechanism controls the hydraulic cylinder to drive the valve core to move, thereby connecting or closing the steam pipeline.

[0012] The beneficial technical effects achieved by the utility model are:

[0013] By setting the steam outlet end of the valve body to an inverted trapezoid and the sealing surface of the valve core to an arc shape, the contact area between the valve core and the steam outlet end of the valve body is increased, which can achieve a better sealing effect; the control valve is set on the high-pressure turbine steam inlet pipeline and the medium-pressure turbine steam inlet pipeline. When the compressor turbine fails and needs to be repaired, the high-pressure and medium-pressure steam can be completely blocked, which is convenient for maintenance and reduces the high-pressure steam wasted due to maintenance;

[0014] By making the sealing surface and the steam outlet end of the valve core from a composite material composed of graphite and mica materials, the control valve can be made resistant to high temperature and high pressure, thereby extending the service life of the control valve;

[0015] By changing the control mode of the control valve from manual to hydraulic control, the control valve can be adjusted more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above features and advantages of the present invention will become more easily understood through the following description with reference to the accompanying drawings. The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. The drawings are not necessarily drawn to scale, but some features may be enlarged or reduced to show the details of specific components. In the drawings:

[0017] Figure 1 It is a structural schematic diagram of the position arrangement of the control valve of the utility model;

[0018] Figure 2 It is a schematic diagram of the contact between the valve core and the steam outlet end of the utility model;

[0019] Figure 3 It is a simple schematic diagram of the hydraulic control of the utility model;

[0020] Reference figures: 1. control valve; 2. high-pressure turbine; 3. medium-pressure turbine; 4. steam outlet; 5. sealing surface; 6. valve body; 7. compressor; 8. high-pressure turbine steam inlet pipeline; 9. medium-pressure turbine steam inlet pipeline; 10. control mechanism; 11. hydraulic cylinder. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 directly connected or indirectly connected 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 the present invention can be understood according to specific circumstances.

[0025] In order to better understand the purpose, structure and function of the utility model, the control valve with high temperature and high pressure resistance of the utility model is further described in detail below with reference to the accompanying drawings.

[0026] Embodiment 1:

[0027] like Figure 1 and Figure 2 As shown, the utility model provides a control valve with high temperature and high pressure resistance characteristics, wherein the control valve 1 is respectively arranged on a high-pressure turbine steam inlet pipeline 8 and a medium-pressure turbine steam inlet pipeline 9; the control valve 1 comprises a power mechanism and a regulating mechanism, and the power mechanism and the regulating mechanism are connected;

[0028] The regulating mechanism is provided with a steam inlet and a steam outlet 4 .

[0029] Embodiment 2:

[0030] like Figure 1 and Figure 2 As shown, the utility model provides a control valve with high temperature and high pressure resistance characteristics, wherein the control valve 1 is respectively arranged on a high-pressure turbine steam inlet pipeline 8 and a medium-pressure turbine steam inlet pipeline 9; the control valve 1 comprises a power mechanism and a regulating mechanism, and the power mechanism and the regulating mechanism are connected;

[0031] The regulating mechanism is provided with a steam inlet and a steam outlet 4 .

[0032] The difference between this embodiment and embodiment 1 is that:

[0033] like Figure 2 As shown, the regulating mechanism includes a valve body 6, on which a steam inlet and a steam outlet 4 are respectively arranged, and a valve core is arranged inside the valve body 6, and a sealing surface 5 of the valve core for sealing the steam outlet is arc-shaped, and the steam outlet 4 end of the valve body is in an inverted trapezoidal shape, and the steam outlet 4 contacts the sealing surface 5 of the valve core, thereby increasing the contact area between the valve core and the steam outlet end of the valve body, and achieving a better sealing effect. When the turbine of the compressor 7 needs to be overhauled, the control valve 1 arranged on the high-pressure turbine steam inlet pipeline 8 and the medium-pressure turbine steam inlet pipeline 9 can completely block the high-pressure and medium-pressure steam, which is convenient for overhaul and reduces the high-pressure steam wasted due to overhaul;

[0034] The sealing surface 5 of the valve core and the steam outlet 4 end are made of composite materials, and the composite materials are composed of graphite and mica materials, which can make the control valve resistant to high temperature and high pressure and extend the service life of the control valve;

[0035] like Figure 3 As shown, the power mechanism includes a hydraulic cylinder 11 and a control mechanism 10. The control mechanism is provided with an oil inlet and an oil outlet. The control mechanism controls the piston in the hydraulic cylinder to drive the valve core to move by controlling the change of the oil volume, thereby connecting or closing the steam pipeline. By changing the control mode of the control valve from manual to hydraulic control, the control valve can be adjusted more conveniently.

[0036] The utility model provides a control valve with high temperature and high pressure resistance. When a compressor turbine fails and needs to be repaired, a control valve 1 arranged on the high-pressure turbine steam inlet pipeline and the medium-pressure turbine steam inlet pipeline can completely block the high-pressure and medium-pressure steam, which is convenient for maintenance and reduces the waste of steam caused by maintenance. After the above-mentioned improvement, 5 tons / hour of high-pressure steam can be saved.

[0037] The parts of the present invention that are not described in detail are prior art, and their internal structures will not be described one by one here.

[0038] Although various embodiments of the present invention have been described in detail herein, it should be understood that the present invention is not limited to the specific embodiments described and illustrated herein, and other modifications and variations may be implemented by those skilled in the art without departing from the essence and scope of the present invention. All such modifications and variations fall within the scope of the present invention. Moreover, all components described herein may be replaced by other technically equivalent components.

Claims

1. A control valve with high temperature and high pressure resistance, characterized in that: The control valves are respectively arranged on the high-pressure turbine steam inlet pipeline and the medium-pressure turbine steam inlet pipeline; the control valves include a power mechanism and a regulating mechanism, and the power mechanism and the regulating mechanism are connected; the regulating mechanism is provided with a steam inlet and a steam outlet.

2. The control valve with high temperature and high pressure resistance according to claim 1, characterized in that: The regulating mechanism comprises a valve body, a steam inlet and a steam outlet are respectively arranged on the valve body, a valve core is arranged in the valve body, and a sealing surface of the valve core for sealing the steam outlet is arc-shaped.

3. The control valve with high temperature and high pressure resistance according to claim 2, characterized in that: The steam outlet end of the valve body is in an inverted trapezoidal shape.

4. The control valve with high temperature and high pressure resistance according to claim 2, characterized in that: The power mechanism comprises a hydraulic cylinder and a control mechanism, and the control mechanism controls the hydraulic cylinder to drive the valve core to move, thereby connecting or closing the steam pipeline.

Images