Highly reliable cooling and pressure reducing device

Abstract

The present invention relates to the technical field of equipment for thermal power plants, and discloses a highly reliable cooling and pressure reducing device including a valve body, the valve body being provided with a valve stem, the valve stem being connected to an electric adjustment mechanism, the valve body being provided with a first support frame and a second support frame, the first support frame being provided on one side of the valve stem, the second support frame being provided on the other side of the valve stem, an electrically controlled telescopic cylinder being connected to a side wall of the first support frame away from the valve stem, and the telescopic portion of the electrically controlled telescopic cylinder extending in a direction close to the valve stem through the first support frame. The telescopic part of the electrically controlled telescopic cylinder is connected to a push plate, and a symmetrical connecting frame is connected to the surface of the push plate close to the valve rod, one end of the connecting frames on both sides is fixedly connected to the push plate, and the other end is slidably inserted into the second supporting frame, the valve rod passes through the center of the connecting frames on both sides, and a clamping assembly is provided between the connecting frames on both sides for clamping the valve rod, and the present invention has the characteristics of high reliability, high breakage resistance and long service life.

Description

[Technical field]

[0001] The present invention relates to the technical field of equipment for thermal power plants, and more particularly to a highly reliable cooling and pressure reducing device. [Background technology]

[0002] The function of the cooling and pressure reducing device is to reduce the steam with high parameters to steam with low parameters. At present, when the heat supply of a thermal power plant is insufficient, most of them directly supply heat through the cooling and pressure reducing device. At present, most of the conventional cooling and pressure reducing devices are composed of a process controller, an electric adjustment mechanism, a valve rod and a valve body, where the valve rod is used to connect the electric adjustment mechanism and the valve body, and the process controller is connected to the electric adjustment mechanism. Since the cooling and pressure reducing device is in standby mode for a long period of time, the process controller controls the adjustment valve of the electric adjustment mechanism itself to open about 7%. Under this condition, the steam passing through is likely to cause the vibration of the adjustment valve, which results in the vibration of the process controller. At the same time, because the temperature of the passing steam is high, the temperature of the electric actuator is also high, and as a result, the temperature of the process controller is also high. Therefore, the process In the prior art, Chinese patent application No. CN206176343U discloses a cooling and pressure reducing device with a separate structure, which includes a process controller and an electric adjusting mechanism, in which a control circuit board and an analog potentiometer for controlling the electric adjusting mechanism are provided, and the process controller and the electric adjusting mechanism are provided separately, and further includes a lead device, one end of which is connected to the process controller and the other end is electrically connected to the electric adjusting mechanism, and since the process controller and the electric adjusting mechanism are provided separately, the process controller is not affected by high temperature and vibration, which is helpful to protect the control circuit board and analog potentiometer of the process controller, and is easy to install, safe and reliable.

[0003] Although the above technical solutions can to a certain extent eliminate the impact of high temperature and vibration on the process controller, they require improvement of the structure of the cooling and pressure reducing device, and cannot solve the problem of vibration of the regulating valve itself. The main cause of the vibration of the regulating valve is the processing error of the valve stem and the valve body that performs the connecting function, resulting in a gap between the valve stem and the valve body. When steam passes through the regulating valve, the valve stem cannot be properly fixed on the regulating valve, resulting in vibration of the regulating valve. The vibration is transmitted to the electric regulating mechanism and the valve body, so that the electric regulating mechanism and the valve body will be in a vibrating state for a long time and will be prone to damage. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of this, the present invention provides a highly reliable cooling and decompression device.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows: A highly reliable cooling and pressure reducing device includes a valve body, the valve body is provided with a valve rod, the valve rod is connected with an electric adjustment mechanism, the valve body is provided with a first support frame and a second support frame, the first support frame is provided on one side of the valve rod, the second support frame is provided on the other side of the valve rod, an electrically controlled telescopic cylinder is connected to a side wall of the first support frame away from the valve rod, the telescopic part of the electrically controlled telescopic cylinder is provided to extend through the first support frame toward the valve rod, a push plate is connected to the telescopic part of the electrically controlled telescopic cylinder, a symmetrical connecting frame is connected to a surface of the pushing plate close to the valve rod, one end of the connecting frames on both sides are fixedly connected to the pushing plate, and the other end of the connecting frames are slidably inserted into the second support frame, the valve rod passes through the center of the connecting frames on both sides, and a clamp assembly for clamping the valve rod is provided between the connecting frames on both sides.

[0006] Preferably, the clamp assembly includes a first clamp plate and a second clamp plate, the first clamp plate and the second clamp plate are disposed on both sides of the valve rod, the first clamp plate is fixedly connected to a surface of the push plate close to the valve rod, a slide rod is disposed on a plate wall of the second clamp plate remote from the valve rod, one end of the slide rod is fixedly connected to the second clamp plate and the other end is slidably inserted into the second support frame, a first rack is disposed on each of the two side walls of the rod part of the slide rod remote from the second clamp plate, a second rack is disposed on each of the ends of the connecting frames on both sides slidably inserted into the second support frame, and gear holders are symmetrically disposed on the side wall of the second support frame remote from the valve rod, the gear holders are disposed on both sides of the slide rod and disposed between the second racks on both sides, a gear is rotatably connected to each of the gear holders on both sides, and the gears on both sides are meshed with and connected to the first rack and the second rack on the corresponding side.

[0007] Preferably, an insulating plate is fixedly connected to the electric adjustment mechanism, and the insulating plate is provided with a controller.

[0008] Preferably, the heat insulating plate has heat dissipation holes.

[0009] Compared with the prior art, the advantages of the present invention are as follows:

[0010] In the present invention, an insulating plate is directly installed on the electric adjustment mechanism, and structures such as a connecting frame, an electrically controlled telescopic cylinder, and a clamping assembly are attached to the valve stem, so that the insulating plate plays the role of insulation and ensures that the controller is not affected by the heat transferred from the electric adjustment mechanism, and the clamping assembly can fix the valve stem, so as to ensure that the valve stem is not easily vibrated, and as a result, the electric adjustment mechanism is not easily vibrated. Compared with the prior art, the improvement on the premise that the main body structure of the conventional cooling and pressure reducing device is not changed, eliminates the impact of high temperature on the controller and avoids vibration, and has the characteristics of high reliability, not easy to break, and long service life. [Brief description of the drawings]

[0011] In order to more clearly describe the technical solutions of the embodiments of the present invention, the following briefly introduces drawings necessary for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0012] [Figure 1] FIG. 2 is a structural schematic diagram of the present invention. [Diagram 2] This is a cross-sectional view taken along line AA. [Diagram 3] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and obviously, the described embodiments are only some but not all of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present invention. (Example)

[0014] As shown in Figs. 1 to 3, this embodiment provides a highly reliable cooling and pressure reducing device including a valve body 1, the valve body 1 is provided with a valve stem 2, the valve stem 2 is connected to an electric adjustment mechanism 3, an insulating plate 16 is fixedly connected to the electric adjustment mechanism 3, and a controller 17 is provided on the insulating plate 16. The insulating plate 16 is used to block the heat transferred from the electric adjustment mechanism 3, thereby ensuring that the controller 17 is not affected by high temperatures; the insulating plate 16 is further provided with a heat dissipation hole 18, which is used to quickly release the heat absorbed by the insulating plate 16, thereby ensuring that the controller 17 is not affected by high temperatures;

[0015] The valve body 1 is provided with a first support frame 4 and a second support frame 5. The first support frame 4 is provided on the right side of the valve stem 2, and the second support frame 5 is provided on the left side of the valve stem 2. An electrically controlled telescopic cylinder 6 is connected to the side wall of the first support frame 4 away from the valve stem 2. The telescopic part of the electrically controlled telescopic cylinder 6 is provided to extend in a direction closer to the valve stem 2 through the first support frame 4. A push plate 7 is fixedly connected to the telescopic part of the electrically controlled telescopic cylinder 6. The surface of the push plate 7 close to the valve stem 2 is provided with a countersunk plate 8. In this embodiment, there are two connecting frames 8, which are arranged horizontally and symmetrically on the upper and lower sides of the push plate 7, and one end of the connecting frames 8 on both the upper and lower sides is fixedly connected to the push plate 7, and the other ends are both slidably inserted into the second support frame 5. With this arrangement, when the electrically controlled telescopic cylinder 6 starts to operate, the connecting frames 8 can be moved so as to slide horizontally when the push plate 7 is moved.

[0016] The valve rod 2 passes through the center of the connecting frame 8, and a clamp assembly for clamping the valve rod 2 is provided between the connecting frames 8 on both sides. The clamp assembly includes a first clamp plate 9 and a second clamp plate 10. The first clamp plate 9 is provided on the right side of the valve rod 2 and is fixedly connected to the push plate 7. The second clamp plate 10 is provided on the left side of the valve rod 2. A slide rod 11 is provided on the plate wall of the second clamp plate 10 away from the valve rod 2. One end of the slide rod 11 is fixedly connected to the second clamp plate 10, and the other end is slidably inserted into the second support frame 5. A first rack 12 is provided on the upper and lower two side walls of the rod part of the slide rod 11 away from the second clamp plate 10. A second rack 13 is provided on the end of each of the connecting frames 8 on both sides slidably inserted into the second support frame 5. Gear holders 14 are symmetrically provided on the side wall of the second support frame 5 away from the valve rod 2. In this embodiment, the number of gear holders 14 is 1. The two gear holders 14 are provided on both sides of the slide rod 11 and are provided between the second racks 13 on both sides. A gear 15 is rotatably connected to each of the two gear holders 14. The gears 15 on both sides are respectively meshed and connected to the first rack 12 and the second rack 13 on the corresponding side. With the above-mentioned arrangement, when the electrically controlled telescopic cylinder 6 starts to operate and the telescopic part is extended to move the push plate 7, the movement of the push plate 7 is caused by the first clamp plate 9 and the connecting frame 8. In this case, the movement of the connecting frame 8 drives the second rack 13 to move, the movement of the second rack 13 drives the gear 15 to rotate, the rotation of the gear 15 drives the first rack 12 to move, which further drives the slide rod 11 to slide, and the sliding of the slide rod 11 drives the second clamp plate 10 to move, and as a result, the second clamp plate 10 and the first clamp plate 9 move opposite to each other to clamp the valve rod 2.

[0017] The working principle of the present invention is as follows: When the cooling and pressure reducing device is in standby state, the electrically controlled telescopic cylinder 6 is controlled to operate, and the telescopic part is extended to clamp the valve stem 2 with the first clamping plate 9 and the second clamping plate 10, ensuring that the valve stem 2 is stable and not easily vibrated, thereby preventing the electric adjustment mechanism 3 and the valve body 1 from vibrating due to the vibration of the valve stem 2, improving the reliability of the whole and extending the service life.

[0018] In describing the present invention, as necessary for the description, the orientations or positional relationships indicated by terms such as "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "one side," "top," "inner," "front," "center," "both ends," and the like are based on the orientations or positional relationships shown in the accompanying drawings and are used only to explain and simplify the description of the present invention, and do not indicate or imply that the devices or elements referred to have a particular orientation and must be constructed and operated in a particular direction, and therefore, they should not be construed as limitations on the present invention.

[0019] In the present invention, unless otherwise specified, the terms "attached", "disposed", "connected", "fixed", "rotatably connected", etc. should be understood in a broad sense, for example, they may be fixedly connected, detachably connected, or integrally formed, may be mechanically connected, or electrical connected, may be a direct connection, an indirect connection through an intermediary, may be an internal communication between two elements, or an interaction relationship between two elements, and unless otherwise specified, a person skilled in the art can understand the specific meaning of the above terms in the present invention according to a specific situation.

[0020] The above contents are only typical examples of the present invention, in addition to them, the present invention may have various other embodiments, and all technical solutions obtained by equivalent substitution or equivalent transformation are all included in the protection scope of the present invention. [Explanation of symbols]

[0021] Explanation of symbols 1. Valve body, 2. Valve stem, 3. Electric adjustment mechanism, 4. First support frame, 5. Second support frame, 6. Electrically controlled telescopic cylinder, 7. Push plate, 8. Connecting frame, 9. First clamp plate, 10. Second clamp plate, 11. Slide rod, 12. First rack, 13. Second rack, 14. Gear holder, 15. Gear, 16. Insulation plate, 17. Controller, 18. Heat dissipation hole.

Claims

1. A highly reliable cooling and pressure reducing device includes a valve body (1), the valve body (1) is provided with a valve stem (2), and an electric adjustment mechanism (3) is connected to the valve stem (2). The valve body (1) is provided with a first support frame (4) and a second support frame (5), in which the first support frame (4) is provided on one side of the valve stem (2), and the second support frame (5) is provided on the other side of the valve stem (2). An electrically controlled telescopic cylinder (6) is connected to a side wall of the first support frame (4) that is remote from the valve stem (2), and a telescopic portion of the electrically controlled telescopic cylinder (6) penetrates the first support frame (4) and is connected to the valve stem (2). a push plate (7) connected to the telescopic portion of an electrically controlled telescopic cylinder (6) extending in a direction close to the valve rod (2), a symmetrical connecting frame (8) connected to a surface of the push plate (7) close to the valve rod (2), one end of each of the connecting frames (8) on both sides is fixedly connected to the push plate (7) and the other end is slidably inserted into a second support frame (5), the valve rod (2) passes through a center of each of the connecting frames (8) on both sides, and a clamp assembly for clamping the valve rod (2) is provided between the connecting frames (8) on both sides.

2. The clamp assembly includes a first clamp plate (9) and a second clamp plate (10), the first clamp plate (9) and the second clamp plate (10) are provided on both sides of the valve rod (2), the first clamp plate (9) is fixedly connected to a surface of the push plate (7) close to the valve rod (2), the plate wall of the second clamp plate (10) away from the valve rod (2) is provided with a slide rod (11), one end of the slide rod (11) is fixedly connected to the second clamp plate (10), and the other end is slidably inserted into the second support frame (5), and the two side walls of the rod part of the slide rod (11) away from the second clamp plate (10) are both provided with a first 2. A highly reliable cooling and decompression device as claimed in claim 1, characterized in that: a rack (12) is provided, a second rack (13) is provided at each end of the connecting frames (8) on both sides slidably inserted into the second support frame (5), and gear holders (14) are symmetrically provided on the side walls of the second support frame (5) remote from the valve rod (2), the gear holders (14) are provided on both sides of the slide rod (11) and between the second racks (13) on both sides, a gear (15) is rotatably connected to each of the gear holders (14) on both sides, and the gears (15) on both sides are respectively connected to and meshed with the first rack (12) and the second rack (13) on the corresponding side.

3. 2. A highly reliable cooling and pressure reducing device as described in claim 1, characterized in that an insulating plate (16) is fixedly connected to the electric adjustment mechanism (3), and a controller (17) is provided on the insulating plate (16).

4. 4. A highly reliable cooling and decompression apparatus according to claim 3, wherein the heat insulating plate (16) is provided with heat dissipation holes (18).

Images