Air valve for acid mist absorption tower pipeline

Abstract

The utility model relates to the technical field of acid mist absorption towers, and provides an air valve for an acid mist absorption tower pipeline, which comprises a cylindrical valve body, a mounting flange is arranged at a first end of the valve body, the air valve is characterized in that a threaded rod for controlling opening and closing of a valve plate is arranged on the outer side of the valve body, a sleeve is arranged on the threaded rod, and a counter bore is formed in the sleeve; the top end of the threaded rod is clamped with the valve plate, and the bottom end of the threaded rod is connected with the mounting flange; each valve plate is provided with a double-arc-shaped coupling part and a semicircular sealing part, the coupling parts of the two valve plates are mutually coupled or separated, and the sealing parts are used for being connected with a pipeline port in a sealed mode. The air valve is simple in structure and convenient to operate, the control structure of the valve plate can be prevented from being corroded by acid mist or generating crystals to affect control over the valve plate, and the practicability of the air valve is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acid mist absorption tower, in particular to a wind valve for acid mist absorption tower pipeline. BACKGROUND

[0002] The acid mist absorption tower is a device for treating chemical tail gas, which is used to remove acidic components in acid mist according to neutralization reaction to meet the requirements of tail gas emission. A wind valve needs to be provided in the flue gas conveying pipeline to control the on-off of flue gas. The existing wind valve generally provides a support valve plate structure, which controls the opening and closing of the valve plate by a control mechanism to control the on-off of the pipeline flue gas, or a plurality of blades are provided in a louver structure, such as the wind valve in patent CN222616011U. However, when these two structures are used in the pipeline of the acid mist absorption tower, the bucket temperature is high, and the water vapor contains crystalline substances and slag, which can easily deform and jam the louver or valve plate. Therefore, the present application provides a wind valve for acid mist absorption tower pipeline. SUMMARY

[0003] The present application provides a wind valve for acid mist absorption tower pipeline to solve the problem that the valve plate of the wind valve is deformed or jammed and cannot normally control the opening and closing of the valve plate due to the special environment of the acid mist absorption tower.

[0004] A wind valve for acid mist absorption tower pipeline, comprising a cylindrical valve body, a mounting flange is provided at the first end of the valve body, a threaded rod for controlling the opening and closing of the valve plate is provided on the outer side of the valve body, a sleeve is provided on the threaded rod, and the sleeve includes a counterbore; the top end of the threaded rod is connected with the valve plate, and the bottom end of the threaded rod is connected with the mounting flange; the coupling part of the valve plate is double-arc-shaped, and the sealing part is semicircular; the coupling parts of the two valve plates are coupled or separated, and the sealing part is used for sealing connection with the pipeline port.

[0005] Optionally, the valve plate is laid on the end face of the second end of the valve body, or the valve plate is provided in the slot on the valve body, and the second end is opposite to the first end.

[0006] Optionally, the two valve plates are coupled to form a complete circular structure, and the top end of the threaded rod is connected with the intersection of the coupling part and the sealing part of the valve plate.

[0007] Optionally, an energized coil is embedded in the coupling end face of the coupling part of the valve plate, a power supply device is electrically connected with the energized coil, and the power supply device is used to output two opposite direction currents.

[0008] Optionally, a sealing gasket is provided on the surface of the sealing part, and a corrosion-resistant layer is provided on the outer surface of the sealing gasket and the surface of the valve plate in contact with the exhaust gas.

[0009] Optionally, a connecting flange is further included, which is connected with the end face of the second end of the valve body and used for connecting with other pipelines.

[0010] Optionally, the corrosion-resistant layer is an oxide film or a passivation film.

[0011] The utility model discloses beneficial effect is:

[0012] The mechanism for controlling the opening and closing of the valve plate in the acid mist absorption tower pipeline air valve provided by the utility model is arranged on the outside of the valve body, so that the control mechanism is prevented from being corroded by acid mist in the valve body or from being affected in controlling the valve plate due to crystallization. In addition, the coupling parts of the two valve plates are coupled to each other to form a round plate covering the pipeline port, and the closed structure is simple, practical and strong in sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 Fig. 1 shows a first three-dimensional structure of an acid mist absorption tower pipeline air valve provided by the utility model;

[0014] Figure 2 Fig. 2 shows a second three-dimensional structure of an acid mist absorption tower pipeline air valve provided by the utility model;

[0015] Figure 3 Fig. 3 shows a schematic diagram of the opening and closing principle of the valve plate in the embodiment;

[0016] Figure 4 Fig. 4 shows a schematic diagram of the valve plate and its local structure in the embodiment;

[0017] Figure 5 Fig. 5 shows a front structure schematic diagram of the control mechanism for opening and closing the valve plate in the embodiment.

[0018] In the drawings:

[0019] 1: valve body; 11: mounting flange; 12: slot; 13: connecting flange; 2: threaded rod; 3: sleeve; 4: valve plate; 41: coupling part; 42: sealing part. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments. In addition, "in an embodiment" or "in an embodiment" appearing at various places in the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in any suitable manner in one or more embodiments.

[0021] It is also important to note that the terms "first" and "second" and the like can be used herein to distinguish one element from another, but do not imply the existence of any such actual relationship or order between such elements. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process or method that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process or method. Without further limitation, an element defined by the phrase "comprising a" does not exclude the existence of additional identical elements in the process or method comprising the element.

[0022] The acid mist absorption tower is a device for treating chemical tail gas, which is used for removing acidic components in the acid mist according to a neutralization reaction, so as to meet the requirements of tail gas emission. A damper needs to be arranged in the flue gas conveying pipeline to control the on-off of the flue gas. The existing damper is generally provided with a support valve plate structure, and a control mechanism is used to control the opening and closing of the valve plate to realize the control of the on-off of the flue gas in the pipeline. Alternatively, a plurality of blades are arranged in a louver structure, such as the damper in patent CN222616011U. However, when the two structures are used in the pipeline of the acid mist absorption tower, the louver or the valve plate is easily deformed and stuck due to high temperature in the barrel, and the water vapor contains crystalline substances and slag. Therefore, the utility model provides a damper for an acid mist absorption tower pipeline, and the specific structure is described in detail in combination with the accompanying drawings.

[0023] As shown in Figures 1 to 5 The utility model provides a damper for an acid mist absorption tower pipeline, which comprises a cylindrical valve body 1, a mounting flange 11 is arranged at the first end of the valve body 1, a threaded rod 2 for controlling the opening and closing of a valve plate 4 is arranged on the outer side of the valve body 1, a sleeve 3 is arranged on the threaded rod 2, and the sleeve 3 comprises a counterbore; the top end of the threaded rod 2 is connected with the valve plate 4, and the bottom end of the threaded rod 2 is connected with the mounting flange 11; the valve plate 4 comprises a double-arc coupling part 41 and a semicircular sealing part 42, the coupling parts 41 of the two valve plates 4 are coupled or separated with each other, and the sealing part 42 is used for sealing connection with a pipeline port.

[0024] As shown in Figure 5 The utility model discloses a damper for an acid mist absorption tower pipeline, which comprises a cylindrical valve body 1, a mounting flange 11 is arranged at the first end of the valve body 1, a threaded rod 2 for controlling the opening and closing of a valve plate 4 is arranged on the outer side of the valve body 1, a sleeve 3 is arranged on the threaded rod 2, and the sleeve 3 comprises a counterbore; the top end of the threaded rod 2 is connected with the valve plate 4, and the bottom end of the threaded rod 2 is connected with the mounting flange 11; the valve plate 4 comprises a double-arc coupling part 41 and a semicircular sealing part 42, the coupling parts 41 of the two valve plates 4 are coupled or separated with each other, and the sealing part 42 is used for sealing connection with a pipeline port.

[0025] In addition, as shown in Figure 3 Figure 3 ​The dashed area in the figure represents the position of the valve plate after rotation. The coupling portions 41 of the two valve plates 4 are coupled to each other to form a circular plate covering the pipeline port, and the two valve plates 4 form two equal-area special-shaped surfaces in the Bagua diagram after being coupled. When it is necessary to open the valve plate 4, an operator inserts a wrench or a pin into the counterbore on the sleeve 3, rotates the valve body 1, and rotates the valve plate 4 connected by the threaded rod 2 by 1-90° with the connection as the center, so that the coupling portions 41 of the two valve plates 4 facing each other are separated from each other, and the gap between the coupling portions 41 is used to escape the waste gas or acid mist. The valve plate 4 not only has a simple structure and is convenient to couple, but also can control the speed of escaping the waste gas or acid mist by controlling the angle of rotation of the valve plate 4, that is, controlling the opening degree of the air valve, thereby further improving the practicability of the air valve. Figure 4 As shown in the figure, Figure 4 The dashed area in the figure, that is, the edge area of each valve plate 4, is used to display the positions of the coupling portion 41 and the sealing portion 42. The sealing portion 42 of the valve plate 4, that is, the semicircular arc surface, is used to be sealingly connected with the pipeline port, so as to avoid the waste gas or acid mist from escaping from the gap between the valve plate 4 and the pipeline after the two valve plates 4 are coupled.

[0026] It should be noted that another protection point of the utility model is that, as shown in the figure, Figure 1 The valve plate 4 is laid on the end face of the second end of the valve body 1, or, as shown in the figure, Figure 2 The valve plate 4 is arranged in the slot 12 on the valve body 1, and the second end is opposite to the first end. That is, the air valve in the utility model can be directly installed at the outlet of the pipeline, and can also be connected in the middle of a pipeline. When the pipeline is connected, two flanges are used for connection respectively, and the valve plate 4 is arranged to pass out of or into the slot 12 on the valve body 1. The former scheme only needs to connect the mounting flange 11 with the port of the pipeline, and arrange the valve plate 4 at the other end opening end of the valve body 1. The latter scheme needs to arrange a connecting flange 13 on the valve body 1, and the connecting flange 13 and the mounting flange 11 are respectively used for connecting with two pipelines or respectively connecting with different sections of the same pipeline.

[0027] As described above, after the two valve plates 4 are coupled, the two valve plates 4 are coupled to form a complete circular structure, and the top end of the threaded rod 2 is used for clamping connection with the intersection of the coupling portion 41 and the sealing portion 42 of the valve plate 4. The clamping structure can be a regular polygon pin and a pin hole, that is, a regular polygon pin structure is arranged at the top end of the threaded rod 2, and the pin structure is used for clamping connection with a regular polygon pin hole on the valve plate 4.

[0028] In some embodiments, in order to increase the sealing and firmness of the coupling between the two valve plates 4, an energized coil is embedded in the coupling end face of the coupling part 41 of the valve plate 4, and a power supply device is electrically connected with the energized coil, and the power supply device is used to output two opposite direction currents. When the current direction in the energized coil in the coupling part 41 of the upper valve plate 4 and the lower valve plate 4 is both positive current, the coil will generate magnetic field in the same direction, so that the coupling part 41 of the two valve plates 4 repel each other, that is, the coupled valve plates 4 are conveniently opened; if the current direction in the energized coil in the coupling part 41 of the upper valve plate 4 and the lower valve plate 4 is one positive current and the other reverse current, the coil will generate magnetic field in opposite directions, so that the coupling part 41 of the two valve plates 4 attract each other, promoting the tight connection between the coupling part 41 of the two valve plates 4.

[0029] In addition, in order to increase the sealing between the coupling part 41 and the sealing part 42 and the pipeline, a sealing gasket is arranged on the surface of the sealing part 42 and the coupling surface of the coupling part 41. The material of the sealing gasket is not specifically limited in the embodiment, and different materials can be selected according to the composition of the waste gas or acid mist in practice to improve the resistance and sealing performance.

[0030] In some embodiments, the outer surface of the sealing gasket and the surface of the valve plate 4 in contact with the waste gas are provided with a corrosion-resistant layer. The corrosion-resistant layer is an oxidation film or a passivation film. The oxidation layer or passivation layer can effectively prevent the corrosion components in the acid mist from corroding the surface of the valve plate or the surface of the sealing gasket. The composition of the oxidation layer needs to match the composition of the actual sealing gasket and the material of the valve plate 4, and the embodiment does not specifically limit this.

[0031] Finally, the utility model provides a kind of acid mist absorption tower pipeline air valve, including the valve body 1 of cylindrical, the first end of the valve body 1 is equipped with mounting flange 11, it is characterized in that, the outside of the valve body 1 is equipped with screw rod 2 for controlling the opening and closing of valve plate 4, the sleeve 3 is equipped on the screw rod 2, and the sleeve 3 includes counterbore;The top end of the screw rod 2 is connected with the valve plate 4, and the bottom end of the screw rod 2 is connected with the mounting flange 11;The coupling part 41 of double arc shape and the sealing part 42 of semicircular shape of the valve plate 4, the coupling part 41 of two valve plates 4 is coupled or separated, and the sealing part 42 is used to be sealed with pipeline port connection.The utility model structure is simple, convenient to operate, can also avoid the control structure of valve plate 4 being corroded by acid mist or generating crystalline substance to affect the control of valve plate 4, improve the practicability of air valve.

[0032] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own emphasis. If the description in an individual embodiment is not exhaustive, the description in other embodiments can be referred to for reference. Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. For the same and similar parts between embodiments, mutual reference can be made.

[0033] The above embodiments only express the implementation of the utility model, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A damper for an acid mist absorption tower pipeline, comprising a cylindrical valve body (1), wherein a mounting flange (11) is provided at the first end of the valve body (1), characterized in that, The valve body (1) is provided with a threaded rod (2) for controlling the opening and closing of the valve plate (4) on the outside. The threaded rod (2) is provided with a sleeve (3) and the sleeve (3) includes a countersunk hole. The top end of the threaded rod (2) is engaged with the valve plate (4) and the bottom end of the threaded rod (2) is connected to the mounting flange (11). The valve plate (4) has a double arc-shaped coupling part (41) and a semi-circular sealing part (42). The coupling parts (41) of the two valve plates (4) are coupled or separated from each other, and the sealing part (42) is used to seal the connection with the pipe port.

2. The air valve for the pipeline of the acid mist absorption tower according to claim 1, characterized in that, The valve plate (4) is laid flat on the end face of the second end of the valve body (1), or the valve plate (4) is inserted into the slot (12) on the valve body (1), with the second end opposite to the first end.

3. The air valve for the pipeline of the acid mist absorption tower according to claim 2, characterized in that, The two valve plates (4) are coupled together to form a complete circular structure. The top end of the threaded rod (2) is used to engage with the coupling part (41) and the sealing part (42) of the valve plate (4).

4. The air valve for the pipeline of the acid mist absorption tower according to claim 2, characterized in that, The coupling end face of the coupling part (41) of the valve plate (4) is embedded with an energized coil. The power supply device is electrically connected to the energized coil and is used to output two currents in opposite directions.

5. The air valve for the pipeline of the acid mist absorption tower according to claim 4, characterized in that, The surface of the sealing part (42) is provided with a sealing gasket, and the outer surface of the sealing gasket and the surface of the valve plate (4) in contact with the exhaust gas are provided with a corrosion-resistant layer.

6. The air valve for the pipeline of the acid mist absorption tower according to claim 2, characterized in that, It also includes a connecting flange (13), which is connected to the end face of the second end of the valve body (1) and is used to connect with other pipelines.

7. The air valve for the pipeline of the acid mist absorption tower according to claim 5, characterized in that, The corrosion-resistant layer is an oxide film or a passivation film.

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