Check valve for desulfurizing agent conveying pipeline

Abstract

The utility model discloses a check valve for a desulfurizing agent conveying pipeline, which belongs to the technical field of desulfurizing tower conveying pipelines and comprises a valve body, a check mechanism and an air pushing mechanism. The non-return mechanism comprises a rotating shaft, a first arm rod fixed to the outer wall of the rotating shaft and a first blocking plate fixed to one end of the first arm rod, and the rotating shaft is rotationally connected into the cavity of the valve body. The air pushing mechanism comprises a top plate, a threaded connector fixed to the outer wall of the top plate, an air inlet pipe arranged at one end of the threaded connector and communicated with the threaded connector, a connecting rod fixed to the bottom of the top plate, a second arm rod rotating on the outer wall of the connecting rod and a second blocking plate fixed to one end of the second arm rod. The limestone solution desulfurization valve is applied to a conveying pipeline of a desulfurization tower, and through mutual cooperation of the non-return mechanism and the pneumatic mechanism of the valve body, the situation that too much limestone solution desulfurization agent is accumulated in the pipeline, blockage is caused, and next operation is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization tower delivery pipelines, in particular to a check valve for a desulfurization agent delivery pipeline. Background Art

[0002] The desulfurization tower is a device used for desulfurization in industry. Its main working principle is to pass the exhaust gas into the middle of the desulfurization tower, and through the delivery pump and delivery pipeline, the pre-stored limestone solution desulfurizer is delivered to the spray system and then sprayed toward the exhaust gas, so that the exhaust gas reacts with the limestone solution to react and eliminate the remaining 40% of sulfur oxides. Finally, the desulfurized exhaust gas is discharged from the chimney.

[0003] When the desulfurization tower stops working, the delivery pump will also stop delivering. Some of the limestone solution desulfurizer will easily flow back into the delivery pipeline toward the spray system, causing the pipeline to be blocked by the limestone solution, affecting the next use.

[0004] Based on this, the utility model designs a check valve for a desulfurizing agent delivery pipeline to solve the above problems. Summary of the Invention

[0005] The purpose of the utility model is to provide a check valve for a desulfurizing agent delivery pipeline to solve the above technical problems.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a check valve for a desulfurization agent delivery pipeline, comprising: a valve body, a check mechanism, and an air push mechanism, wherein a cavity is formed inside the valve body;

[0007] The anti-return mechanism includes a rotating shaft, a first arm fixed to the outer wall of the rotating shaft, and a first blocking plate fixed to one end of the first arm, wherein the rotating shaft is rotatably connected to the cavity of the valve body;

[0008] The air propulsion mechanism includes a top plate, a threaded joint fixed to the outer wall of the top plate, an air inlet pipe provided at one end of the threaded joint and connected to the top plate, a connecting rod fixed to the bottom of the top plate, a second arm rod rotated on the outer wall of the connecting rod, and a second blocking plate fixed to one end of the second arm rod;

[0009] The outer wall of the connecting rod is sleeved with a double-arm torsion spring, and the two arm ends of the double-arm torsion spring are respectively fixed to the top plate and the outer wall of the second arm rod.

[0010] Preferably, one end of the air inlet pipe is rotatably connected to a nut, and the nut is threadedly connected to the threaded end of the threaded joint.

[0011] Preferably, one end of the threaded joint passes through the top plate, and the second blocking plate covers the end of the threaded joint passing through the top plate.

[0012] Preferably, a rubber pad is fixed to the outer wall of the second blocking plate covering one end of the threaded joint.

[0013] Preferably, a first connection port is provided on the top of the valve body, two symmetrical second connection ports are provided on the outer wall of the valve body, and the top plate is fixed to the first connection port of the valve body.

[0014] Preferably, the two second connection ports of the valve body are respectively fixed with a liquid inlet pipe and an introduction pipe, the first blocking plate blocks a second connection port close to the liquid inlet pipe, and a rubber pad is fixed to the outer wall.

[0015] Preferably, an air pressure monitor is fixed on the top of the top plate, and one end of the air pressure monitor passes through the top plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] First, when the delivery pump of the desulfurization tower stops working, the first blocking plate in the anti-return mechanism affected by gravity will fall back and block the first connecting port near the liquid inlet pipe again, so that the limestone solution desulfurizer entering the valve body will not flow back;

[0018] Secondly, the part of the limestone solution desulfurizer retained in the valve body can be connected to an air compressor through the air inlet pipe in the air push mechanism, and the compressed air is input into the valve body through the threaded joint, and the limestone solution desulfurizer retained in the valve body is pushed by the air pressure to continue to be transported;

[0019] The anti-return mechanism and the air push mechanism cooperate with each other to avoid excessive accumulation of limestone solution desulfurizer in the pipeline, causing blockage and affecting the next operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0022] Figure 2 This is a schematic diagram highlighting the external connection structure of the valve body in this embodiment;

[0023] Figure 3 This is a schematic diagram highlighting the structure inside the valve body of this embodiment;

[0024] Figure 4 This is a schematic diagram highlighting the connecting rod connection structure of this embodiment.

[0025] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0026] 1. Valve body; 2. Rotating shaft; 3. First arm; 4. First blocking plate; 5. Top plate; 6. Threaded joint; 7. Nut; 8. Inlet pipe; 9. Air pressure monitor; 10. Connecting rod; 11. Second arm; 12. Second blocking plate; 13. Double-arm torsion spring; 14. Liquid inlet pipe; 15. Inlet pipe; 16. First connection port; 17. Second connection port. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figure 1-4 The utility model provides a technical solution: a check valve for a desulfurization agent delivery pipeline, comprising: a valve body 1, a check mechanism and an air push mechanism, wherein a cavity is opened inside the valve body 1;

[0029] The anti-return mechanism includes a rotating shaft 2, a first arm 3 fixed to the outer wall of the rotating shaft 2, and a first blocking plate 4 fixed to one end of the first arm 3. The rotating shaft 2 is rotatably connected to the cavity of the valve body 1;

[0030] The pneumatic propulsion mechanism includes a top plate 5, a threaded joint 6 fixed to the outer wall of the top plate 5, an air inlet pipe 8 provided at one end of the threaded joint 6 and connected thereto, a connecting rod 10 fixed to the bottom of the top plate 5, a second arm 11 rotating on the outer wall of the connecting rod 10, and a second blocking plate 12 fixed to one end of the second arm 11;

[0031] The outer wall of the connecting rod 10 is provided with a double-arm torsion spring 13, and the two arm ends of the double-arm torsion spring 13 are respectively fixed to the top plate 5 and the outer wall of the second arm rod 11;

[0032] The valve body 1 is a link in the limestone solution desulfurizer delivery pipeline of the desulfurization tower. It is installed between the liquid inlet pipe 14 of the delivery pump and the inlet pipe 15 of the spray system. In the internal non-return mechanism, the rotatable first baffle 4 blocks the port facing the liquid inlet pipe 14, which can be pushed open by the limestone solution desulfurizer input into the valve body 1. After the input stops, it falls back and is re-sealed due to gravity to prevent backflow. In the air push mechanism, the air compressor is connected to the valve body 1 through the threaded joint 6 and the air inlet pipe 8. Compressed air is mainly used to push the limestone solution desulfurizer accumulated in the valve body 1 to continue to be delivered through air pressure after the delivery pump stops. One end of the threaded joint 6 is usually blocked by the second baffle 12, and compressed air can push it to rotate and open. When no air is input, the rebound thrust of the double-arm torsion spring 13 causes the second baffle 12 to cover and block the threaded joint 6 to avoid affecting the air pressure balance of the valve body 1 when the delivery pump is operating.

[0033] Further preferably, one end of the air inlet pipe 8 is rotatably connected to a nut 7, and the nut 7 is threadedly connected to the threaded end of the threaded connector 6;

[0034] The air inlet pipe 8 is connected to the threaded joint 6 through a nut 7, and the nut 7 can be rotated for disassembly and assembly, which is convenient for cleaning and maintenance.

[0035] Further preferably, one end of the threaded joint 6 passes through the top plate 5, and the second blocking plate 12 covers the end of the threaded joint 6 passing through the top plate 5;

[0036] The threaded joint 6 is connected to the air inlet pipe 8 through its threaded end, and the other end thereof penetrates the top plate 5 and is used for supplying air into the valve body 1 .

[0037] Further preferably, a rubber pad is fixed to the outer wall of the second blocking plate 12 covering one end of the threaded joint 6;

[0038] When the second blocking plate 12 covers and blocks the threaded joint 6 , the sealing capability is enhanced by the rubber pad.

[0039] Further preferably, a first connection port 16 is provided on the top of the valve body 1, two symmetrical second connection ports 17 are provided on the outer wall of the valve body 1, and the top plate 5 is fixed to the first connection port 16 of the valve body 1;

[0040] The valve body 1 is mainly mounted on the top plate 5 through the first connection port 16 thereof, so that the air push mechanism can be installed and used.

[0041] Further preferably, the two second connection ports 17 of the valve body 1 are respectively fixed with a liquid inlet pipe 14 and an introduction pipe 15, the first blocking plate 4 blocks one of the second connection ports 17 close to the liquid inlet pipe 14, and a rubber pad is fixed on the outer wall;

[0042] The two second connection ports 17 of the valve body 1 are mainly used in conjunction with the liquid inlet pipe 14 and the introduction pipe 15. When the first blocking plate 4 blocks the second connection port 17 close to the liquid inlet pipe 14, the sealing performance can be increased by cooperating with the rubber pad.

[0043] Further preferably, an air pressure monitor 9 is fixed on the top of the top plate 5, and one end of the air pressure monitor 9 passes through the top plate 5;

[0044] The air pressure monitor 9 cooperates with the monitoring terminal to monitor the pressure inside the valve body 1, and outputs the monitoring data from the external terminal. The auxiliary personnel monitor the air pressure of the valve body 1 to ensure stable operation.

[0045] A specific application of this embodiment is as follows: the valve body 1 is connected to the liquid inlet pipe 14 of the desulfurization tower delivery pump through its second connection port 17. The delivery pump of the desulfurization tower inputs the limestone solution desulfurizer to be transported into the valve body 1, and the first blocking plate 4 in the valve body 1 is close to and blocked by the second connection port 17 near the liquid inlet pipe 14. After entering the valve body 1, the limestone solution desulfurizer pushes up the first blocking plate 4 and the first arm 3 to rotate, allowing the limestone solution desulfurizer to smoothly enter the valve body 1, and then the inlet pipe 15 of another second connection port 17 delivers the limestone solution desulfurizer to the connected desulfurization tower spray system;

[0046] When the delivery pump of the desulfurization tower stops working, the first blocking plate 4 will fall back and block again due to gravity, close to the first connecting port 16 of the liquid inlet pipe 14, so that the limestone solution desulfurizer entering the valve body 1 will not flow back, and the valve body 1 will still retain some limestone solution desulfurizer without power output. At this time, the air compressor can be connected to the air inlet pipe 8, and the compressed air can be input into the valve body 1 through the threaded joint 6, and the limestone solution desulfurizer accumulated in the valve body 1 can be pushed by the air pressure to continue to be delivered.

[0047] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 invention.

[0048] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A check valve for a desulfurizing agent delivery pipeline, characterized in that: include: A valve body (1), a check mechanism, and an air push mechanism, wherein a cavity is formed inside the valve body (1); The anti-return mechanism comprises a rotating shaft (2), a first arm (3) fixed to the outer wall of the rotating shaft (2), and a first blocking plate (4) fixed to one end of the first arm (3); the rotating shaft (2) is rotatably connected to the cavity of the valve body (1); The air propulsion mechanism comprises a top plate (5), a threaded joint (6) fixed to the outer wall of the top plate (5), an air inlet pipe (8) provided at one end of the threaded joint (6) and connected thereto, a connecting rod (10) fixed to the bottom of the top plate (5), a second arm (11) rotated on the outer wall of the connecting rod (10), and a second blocking plate (12) fixed to one end of the second arm (11); The outer wall of the connecting rod (10) is sleeved with a double-arm torsion spring (13), and the two arm ends of the double-arm torsion spring (13) are respectively fixed to the top plate (5) and the outer wall of the second arm rod (11).

2. The check valve for a desulfurizing agent delivery pipeline according to claim 1, characterized in that: One end of the air inlet pipe (8) is rotatably connected to a nut (7), and the nut (7) is threadedly connected to the threaded end of the threaded joint (6).

3. The check valve for a desulfurizing agent delivery pipeline according to claim 1, characterized in that: One end of the threaded joint (6) passes through the top plate (5), and the second blocking plate (12) covers the end of the threaded joint (6) passing through the top plate (5).

4. The check valve for a desulfurizing agent delivery pipeline according to claim 3, characterized in that: A rubber pad is fixed to the outer wall of the second blocking plate (12) covering one end of the threaded joint (6).

5. The check valve for a desulfurizing agent delivery pipeline according to claim 1, characterized in that: The top of the valve body (1) is provided with a first connection port (16), the outer wall of the valve body (1) is provided with two symmetrical second connection ports (17), and the top plate (5) is fixed to the first connection port (16) of the valve body (1).

6. The check valve for a desulfurizing agent delivery pipeline according to claim 5, characterized in that: The two second connection ports (17) of the valve body (1) are respectively fixed with a liquid inlet pipe (14) and an introduction pipe (15); the first blocking plate (4) blocks a second connection port (17) close to the liquid inlet pipe (14), and a rubber pad is fixed to the outer wall.

7. The check valve for a desulfurizing agent delivery pipeline according to claim 1, characterized in that: An air pressure monitor (9) is fixed to the top of the top plate (5), and one end of the air pressure monitor (9) passes through the top plate (5).

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