Novel flue gas desulfurization electric hydraulic gate valve sealing device

Abstract

The utility model discloses a novel flue gas desulfurization electric hydraulic gate valve sealing device, which belongs to the technical field of flue gas desulfurization systems and comprises a flue gas desulfurization pipeline body, a motor support is fixedly mounted at the upper end of the flue gas desulfurization pipeline body, a driving machine body is fixedly mounted on the motor support, and a driving rod is fixedly mounted at the transmission end of the driving machine body. The sealing device comprises a flue gas desulfurization pipeline body, a driving rod is arranged in the flue gas desulfurization pipeline body, a sealing plate is arranged below the driving rod, the sealing plate is in threaded connection with the driving rod, a valve frame is arranged on the outer side of the sealing plate, and a sealing mechanism is arranged in the middle of the flue gas desulfurization pipeline body. The sealing end of the gate valve is wrapped on the inner side by increasing the sealing range and the sealing strength, the sealing performance and reliability of the gate valve are ensured, a layer of sealing protection structure is additionally arranged on the basis of the basic sealing effect of the gate valve, the sealing performance of the gate valve is ensured, and the probability of sulfur dioxide leakage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization systems, in particular to a novel flue gas desulfurization electric hydraulic plug-in valve sealing device. Background Art

[0002] Flue gas desulfurization is an industrial flue gas treatment technology that aims to reduce sulfur dioxide (SO2) emissions generated during the combustion of sulfur-containing fuels such as coal and oil, in order to reduce harm to the environment and human health. Sulfur dioxide is a toxic gas that pollutes the atmosphere, forms acid rain, and damages human health and the ecosystem. The gate valve is a commonly used shut-off valve. Its working principle is to open or close the fluid by inserting or removing a plate perpendicular to the direction of the fluid. In the flue gas desulfurization and denitrification system, the gate valve is installed after the induced draft fan and before the booster fan.

[0003] In the current flue gas desulfurization system, electric hydraulic gate valves are widely used in the pipeline between the induced draft fan and the booster fan to achieve flue gas cut-off and control. This type of valve usually uses a sealing gasket as a sealing element and is installed between the pipeline and the valve body to prevent flue gas leakage. However, in actual operation, this traditional sealing method often cannot meet high-standard sealing requirements, especially when dealing with corrosive media such as sulfur dioxide (SO2). The corrosion resistance and sealing performance of the sealing gasket may be affected, resulting in poor sealing effect; and the seals in the existing electric hydraulic gate valves are difficult to replace and repair. Utility Model Content

[0004] The utility model aims to provide a novel flue gas desulfurization electric hydraulic gate valve sealing device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of flue gas desulfurization electric hydraulic plug valve sealing device, including a flue gas desulfurization pipeline body, a motor bracket is fixedly installed on the upper end of the flue gas desulfurization pipeline body, a driving body is fixedly installed on the motor bracket, a driving rod is fixedly installed on the transmission end of the driving body, a sealing plate is arranged below the driving rod, the sealing plate is threadedly connected to the driving rod, a valve frame is arranged on the outer side of the sealing plate, the valve frame is fixedly installed on the flue gas desulfurization pipeline body, and the middle part of the flue gas desulfurization pipeline body is fixedly installed on the flue gas desulfurization pipeline body. A sealing mechanism is provided, and the sealing mechanism includes a first ring plate, a second ring plate, a first limiting plate, a first sealing rubber pad, a second limiting plate and a second sealing rubber pad. The first ring plate is provided in front of the flue gas desulfurization pipeline body, and the second ring plate is provided behind the flue gas desulfurization pipeline body. The first limiting plate is fixedly installed on the left ends of the first ring plate and the second ring plate, and a first sealing rubber pad is installed between the two groups of the first limiting plates. The second limiting plate is fixedly installed on the right ends of the first ring plate and the second ring plate, and a second sealing rubber pad is installed between the two groups of the second limiting plates.

[0006] Optionally, the sealing mechanism also includes a rotating rod, a rotating seat, a mounting plate, an adjusting seat, a limit rod, a limit seat, a first sealing gasket, a second sealing gasket, a first interface rubber pad and a second interface rubber pad, a rotating rod is installed at one end of the first ring plate close to the second ring plate, a rotating seat is installed at one end of the second ring plate close to the first ring plate, and the rotating seat is rotatably connected to the rotating rod.

[0007] Optionally, a mounting plate is fixedly mounted on the upper end of the second ring plate, and an adjustment seat is fixedly mounted on the upper end of the mounting plate.

[0008] Optionally, a limit clamping rod is installed at the front end of the adjustment seat, and the limit clamping seat is fixedly installed at the upper end of the first ring plate. The limit clamping seat and the limit clamping rod are in a buckle connection relationship.

[0009] Optionally, a first sealing gasket is fixedly installed on the left end of the valve frame, and a second sealing gasket is fixedly installed on the right end of the valve frame.

[0010] Optionally, a first interface rubber pad is fixedly mounted on the upper end of the second ring plate, and a second interface rubber pad is fixedly mounted on the upper end of the first ring plate.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, a sealing mechanism is provided, and the sealing mechanism adopts a double-layer sealing structure, including a first sealing gasket and a second sealing gasket, which improves the sealing performance while also increasing the sealing reliability. The provision of the first limit plate, the first sealing rubber pad, the second limit plate and the second sealing rubber pad further ensures the sealing performance of the electric hydraulic gate valve sealing device; the sealing mechanism fully considers the corrosion resistance problem, and by selecting corrosion-resistant materials and reasonable structural design, the sealing mechanism can still maintain good sealing performance when dealing with corrosive media such as sulfur dioxide. Compared with traditional sealing methods, the sealing mechanism makes the sealing of the electric hydraulic gate valve easier to replace and repair, thereby improving the convenience of maintenance; the sealing mechanism wraps the sealing end of the gate valve on the inside, and improves the sealing effect of the gate valve by increasing the sealing range and sealing strength. Under the basic sealing effect of the gate valve, the sealing mechanism provides an additional layer of sealing protection structure, which effectively reduces the probability of sulfur dioxide leakage and improves the overall performance of the flue gas desulfurization system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model in a three-dimensional front view;

[0014] Figure 2 This is a schematic diagram of the structure of the three-dimensional rear view of the utility model;

[0015] Figure 3 The structure of the utility model is schematically shown in a three-dimensional cutaway view. Figure 1 ;

[0016] Figure 4 This is a schematic diagram of the structure of the utility model when viewed from above;

[0017] Figure 5 It is a schematic structural diagram of the utility model in a plane front view;

[0018] Figure 6 The structure of the utility model is schematically shown in a three-dimensional cutaway view. Figure 2 ;

[0019] Figure 7 The structure of the utility model is schematically shown in a three-dimensional cutaway view. Figure 3 ;

[0020] Figure 8 The structure of the utility model is schematically shown in a three-dimensional cutaway view. Figure 4 ;

[0021] Fig. 9 For this utility model Figure 3 Schematic diagram of the three-dimensional enlarged structure at point A in the middle.

[0022] In the figure: 1. flue gas desulfurization pipeline body; 2. motor bracket; 3. driving body; 4. driving rod; 5. sealing plate; 6. valve frame; 7. sealing mechanism; 701. first ring plate; 702. second ring plate; 703. rotating rod; 704. rotating seat; 705. mounting plate; 706. adjusting seat; 707. limiting clamping rod; 708. limiting clamping seat; 709. first sealing gasket; 710. second sealing gasket; 711. first limiting plate; 712. first sealing rubber pad; 713. second limiting plate; 714. second sealing rubber pad; 715. first interface rubber pad; 716. second interface rubber pad. DETAILED DESCRIPTION

[0023] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0025] 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.

[0026] See also Figures 1 to 9In the embodiment of the utility model, a new type of flue gas desulfurization electric hydraulic plug valve sealing device includes a flue gas desulfurization pipeline body 1, a motor bracket 2 is fixedly installed on the upper end of the flue gas desulfurization pipeline body 1, a driving body 3 is fixedly installed on the motor bracket 2, a driving rod 4 is fixedly installed on the transmission end of the driving body 3, a sealing plate 5 is arranged below the driving rod 4, the sealing plate 5 is threadedly connected to the driving rod 4, a valve frame 6 is arranged on the outer side of the sealing plate 5, the valve frame 6 is fixedly installed on the flue gas desulfurization pipeline body 1, and a sealing mechanism 7 is arranged in the middle of the flue gas desulfurization pipeline body 1, and the sealing mechanism 7 includes a first The ring plate 701, the second ring plate 702, the first limiting plate 711, the first sealing pad 712, the second limiting plate 713 and the second sealing pad 714 are provided in front of the flue gas desulfurization pipeline body 1. The second ring plate 702 is provided at the rear of the flue gas desulfurization pipeline body 1. The first limiting plate 711 is fixedly installed on the left ends of the first ring plate 701 and the second ring plate 702. The first sealing pad 712 is installed between the two sets of first limiting plates 711. The second limiting plate 713 is fixedly installed on the right ends of the first ring plate 701 and the second ring plate 702. The two sets of second limiting plates A second sealing rubber pad 714 is installed between the plates 713, and the sealing mechanism 7 also includes a rotating rod 703, a rotating seat 704, a mounting plate 705, an adjusting seat 706, a limiting clamp rod 707, a limiting clamp seat 708, a first sealing gasket 709, a second sealing gasket 710, a first interface rubber pad 715 and a second interface rubber pad 716. The rotating rod 703 is installed at one end of the first ring plate 701 close to the second ring plate 702, and the rotating seat 704 is installed at one end of the second ring plate 702 close to the first ring plate 701. The rotating seat 704 is rotatably connected to the rotating rod 703, and the upper end of the second ring plate 702 A mounting plate 705 is fixedly installed, an adjusting seat 706 is fixedly installed on the upper end of the mounting plate 705, a limiting clamping rod 707 is installed on the front end of the adjusting seat 706, a limiting clamping seat 708 is fixedly installed on the upper end of the first ring plate 701, and the limiting clamping seat 708 and the limiting clamping rod 707 are in a buckle connection relationship, a first sealing gasket 709 is fixedly installed on the left end of the valve frame 6, a second sealing gasket 710 is fixedly installed on the right end of the valve frame 6, a first interface rubber pad 715 is fixedly installed on the upper end of the second ring plate 702, and a second interface rubber pad 716 is fixedly installed on the upper end of the first ring plate 701;

[0027] The first ring plate 701, as a component of the sealing mechanism 7, plays a fixing role. It tightly connects the sealing mechanism 7 with the flue gas desulfurization pipeline body 1, ensuring the stability of the sealing mechanism 7. At the same time, the second ring plate 702 works in conjunction with the first ring plate 701 to further improve the sealing performance of the sealing mechanism 7 and jointly form a sealed space so that flue gas cannot leak through this space. The limiting clamp rod 707 is used to limit the moving range of the sealing mechanism 7 to ensure that the sealing mechanism 7 works in the correct position, thereby improving the sealing effect. The limiting clamp seat 708 works in conjunction with the limiting clamp rod 707 to jointly limit the moving range of the sealing mechanism 7 and ensure the stability of the sealing mechanism 7. The first limiting plate 711, the first sealing pad 712, the second limiting plate 713 and the second sealing pad 714 together constitute a double-layer sealing structure of the sealing mechanism 7, ensuring the sealing and reliability of the electric hydraulic gate valve sealing device.

[0028] The working principle of the utility model is as follows: the flue gas desulfurization electric hydraulic gate valve sealing device is additionally provided with a sealing mechanism 7. Before using the flue gas desulfurization electric hydraulic gate valve sealing device, the driving body 3 needs to be connected to the power and the control terminal in advance. When using the flue gas desulfurization electric hydraulic gate valve sealing device, the driving body 3 is started to drive the driving rod 4 to rotate, so that the sealing plate 5 can be inserted down to the middle of the flue gas desulfurization pipeline body 1 to achieve the plugging effect. The difference is that during the plugging process, the sealing mechanism 7 is activated to achieve a double-layer sealing effect. First, the first sealing gasket 709 and the second sealing gasket 710 inside the sealing mechanism 7 are installed between the flue gas desulfurization pipeline body 1 and the sealing device. This partial sealing structure can ensure the sealing performance of the sealing device. In addition, the first limit plate 711 and the second limit plate 712 are installed between the flue gas desulfurization pipeline body 1 and the sealing device. A sealing pad 712, a second limiting plate 713 and a second sealing pad 714 are mounted on the outer side of the valve frame 6, wrapping the valve frame 6 on the inner side, especially the first limiting plate 711, the first limiting plate 712, the second limiting plate 713 and the second sealing pad 714 are squeezed and sealed and installed on the flue gas desulfurization pipeline body 1, wrapping the valve frame 6 on the inner side, thereby ensuring the sealing and reliability of the electric hydraulic gate valve sealing device; in summary, the sealing mechanism 7 is mounted on the middle part of the flue gas desulfurization pipeline body 1, and the sealing end of the gate valve is wrapped on the inner side by increasing the sealing range and sealing strength, thereby ensuring the sealing and reliability of the gate valve, and adding a layer of sealing protection structure to the basic sealing effect of the gate valve, thereby ensuring the sealing of the gate valve and reducing the probability of sulfur dioxide leakage.

[0029] 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 novel flue gas desulfurization electric hydraulic gate valve sealing device, comprising a flue gas desulfurization pipeline body (1), a motor bracket (2) is fixedly mounted on the upper end of the flue gas desulfurization pipeline body (1), a driving body (3) is fixedly mounted on the motor bracket (2), a driving rod (4) is fixedly mounted on the transmission end of the driving body (3), a sealing plate (5) is arranged below the driving rod (4), the sealing plate (5) is threadedly connected to the driving rod (4), a valve frame (6) is arranged on the outer side of the sealing plate (5), and the valve frame (6) is fixedly mounted on the flue gas desulfurization pipeline body (1), characterized in that: A sealing mechanism (7) is arranged in the middle of the flue gas desulfurization pipeline body (1), and the sealing mechanism (7) comprises a first ring plate (701), a second ring plate (702), a first limit plate (711), a first sealing rubber pad (712), a second limit plate (713) and a second sealing rubber pad (714); the first ring plate (701) is arranged in front of the flue gas desulfurization pipeline body (1), the second ring plate (702) is arranged at the rear of the flue gas desulfurization pipeline body (1), the first limit plate (711) is fixedly mounted on the left ends of the first ring plate (701) and the second ring plate (702), the first sealing rubber pad (712) is mounted between two groups of the first limit plates (711), the second limit plate (713) is fixedly mounted on the right ends of the first ring plate (701) and the second ring plate (702), and the second sealing rubber pad (714) is mounted between the two groups of the second limit plates (713).

2. According to claim 1, a new type of flue gas desulfurization electric hydraulic gate valve sealing device is characterized in that: The sealing mechanism (7) further comprises a rotating rod (703), a rotating seat (704), a mounting plate (705), an adjusting seat (706), a limiting clamping rod (707), a limiting clamping seat (708), a first sealing gasket (709), a second sealing gasket (710), a first interface rubber pad (715) and a second interface rubber pad (716); the rotating rod (703) is mounted on one end of the first ring plate (701) close to the second ring plate (702); the rotating seat (704) is mounted on one end of the second ring plate (702) close to the first ring plate (701); and the rotating seat (704) is rotatably connected to the rotating rod (703).

3. A new type of flue gas desulfurization electric hydraulic gate valve sealing device according to claim 2, characterized in that: A mounting plate (705) is fixedly mounted on the upper end of the second ring plate (702), and an adjustment seat (706) is fixedly mounted on the upper end of the mounting plate (705).

4. A new type of flue gas desulfurization electric hydraulic gate valve sealing device according to claim 3, characterized in that: A limit clamping rod (707) is installed at the front end of the adjustment seat (706), and a limit clamping seat (708) is fixedly installed at the upper end of the first ring plate (701). The limit clamping seat (708) and the limit clamping rod (707) are in a buckle connection relationship.

5. According to claim 1, a new type of flue gas desulfurization electric hydraulic gate valve sealing device is characterized in that: A first sealing gasket (709) is fixedly mounted on the left end of the valve frame (6), and a second sealing gasket (710) is fixedly mounted on the right end of the valve frame (6).

6. A new type of flue gas desulfurization electric hydraulic gate valve sealing device according to claim 2, characterized in that: A first interface rubber pad (715) is fixedly mounted on the upper end of the second ring plate (702), and a second interface rubber pad (716) is fixedly mounted on the upper end of the first ring plate (701).

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