Device for balancing pressure on two sides of butterfly valve of waste gas system

Abstract

The utility model relates to the technical field of marine diesel engines, and discloses a device for balancing pressure on two sides of a butterfly valve of an exhaust gas system, which comprises a pressure balance valve and a connecting pipeline, and the butterfly valve is additionally arranged on the other side of the pressure balance valve. And the differential pressure sensor is arranged on the outer side of the connecting pipeline. According to the device for balancing the pressure on the two sides of the butterfly valve of the waste gas system, firstly, pressure balance valves are connected to the two sides of the butterfly valve through connecting pipelines, pressure difference sensors are installed on the two sides of a butterfly valve pipeline, and the pressure balance valves monitor the pressure on the two sides of the butterfly valve of the waste gas system by reading numerical values of the pressure difference sensors; when the pressure difference exceeds the set value, the pressure balance valve is opened to balance the pressure on the two sides of the exhaust gas system butterfly valve, and then the exhaust gas system butterfly valve is assisted to be opened, so that the exhaust gas system butterfly valve is prevented from being damaged. As the pressure difference can be monitored in real time, whether the pressure difference exceeds a limit value or not can be judged when the butterfly valve of the waste gas system needs to be opened.

Description

Technical Field

[0001] The utility model relates to the technical field of marine diesel engines, in particular to a device for balancing the pressure on both sides of a butterfly valve of an exhaust system. Background Art

[0002] Marine diesel engines are essential devices that convert thermal energy into mechanical energy and are widely used as propulsion power on various ships. Marine diesel engines can be divided into main engines and auxiliary engines based on their function within the ship. The main engine serves as the ship's propulsion power, while the auxiliary engines drive generators, air compressors, water pumps, and other components. Marine diesel engines do require the use of butterfly valves, which are primarily used to control or cut off the flow of fluids. In the diesel engine's exhaust line, butterfly valves open or close the exhaust passage to meet the engine's operating requirements.

[0003] Common butterfly valves used in exhaust systems are typically composed of a valve body, valve plate, valve stem, sealing device, and transmission device. The valve body is the outer shell of the butterfly valve, used to accommodate and secure other components and provide some protection. The valve plate is the main movable part of the butterfly valve, which can rotate within the valve body. The valve stem is the transmission component connecting the valve plate and the transmission device. The sealing device is an important component of butterfly valves used in marine diesel engines and is used to ensure the valve's sealing performance. The transmission device is the device that controls the rotation of the valve plate.

[0004] Traditional butterfly valves used in exhaust systems are equipped with selective catalytic reduction devices as exhaust treatment systems for many marine diesel engines to reduce the emission of nitrogen oxides in the exhaust gas. When the exhaust treatment system is turned on, the butterfly valve connected to the exhaust system needs to be opened. However, due to the pressure difference on both sides of the butterfly valve, if the pressure on both sides is not balanced, the butterfly valve of the exhaust system may be damaged, affecting the operation of the ship and endangering the safety of the operator. To solve the above problems, some butterfly valves used in exhaust systems use a section of pipe to connect the two ends of the butterfly valve, with a throttling orifice plate in the middle. However, this method has the problem of slow pressure regulation and inaccurate pressure differential regulation. For this reason, a device for balancing the pressure on both sides of the butterfly valve of the exhaust system is proposed. Utility Model Content

[0005] (1) Technical problems solved

[0006] In view of the deficiencies of the prior art, the present invention provides a device for balancing the pressure on both sides of a butterfly valve in an exhaust system, so as to solve the above-mentioned technical problems of slow pressure regulation and inaccurate pressure difference regulation.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a device for balancing the pressure on both sides of a butterfly valve in an exhaust system, comprising:

[0009] A pressure balancing valve and a connecting pipeline arranged on one side of the pressure balancing valve, and a butterfly valve is additionally provided on the other side of the pressure balancing valve;

[0010] The differential pressure sensor is installed on the outside of the connecting pipe. First, the pressure balancing valve is connected to both sides of the butterfly valve through the connecting pipe. The differential pressure sensor is installed on both sides of the butterfly valve pipe. The pressure balancing valve monitors the pressure on both sides of the exhaust system butterfly valve by reading the value of the differential pressure sensor. When the pressure difference exceeds the set value, the pressure balancing valve is opened to balance the pressure on both sides of the exhaust system butterfly valve, and then the exhaust system butterfly valve is assisted to open, thereby preventing damage to the exhaust system butterfly valve.

[0011] Preferably, the connecting pipe is composed of an upper connecting pipe and a lower connecting pipe, and a first flange and a second flange are respectively provided between the upper connecting pipe and the lower connecting pipe. The upper connecting pipe and the lower connecting pipe are connected through the first flange and the second flange.

[0012] Preferably, bolts are vertically provided around the top of the second flange, and nuts are threadedly connected to the lower outer surfaces of the bolts. The second flanges of the upper connecting pipe and the lower connecting pipe are connected by bolts and nuts.

[0013] Preferably, an outer shell is evenly inserted around the top of the first flange, and a rotating plate is added to the top of the outer shell, and the rotating plate is fitted with the top of the first flange. The rotating plate rotates on the top of the first flange.

[0014] Preferably, side extension plates are mounted at the centers of both sides of the rotating plate, and fixed posts are inserted at the centers of the tops of the side extension plates. Position-limiting side grooves are provided on both sides of the top centers of the side extension plates, and position-limiting side blocks are mounted at the centers of the surfaces of the fixed posts. When the rotating plate has completed its rotation on top of the first flange, the bottom ends of the fixed posts are inserted into the interior of the first flange via the side extension plates to connect the first flange, and the fixed posts are rotated on the side extension plates to displace the position-limiting side blocks from the position-limiting side grooves. This not only connects the rotating plate to the first flange, but also ensures the stability of the connection between the rotating plate and the first flange.

[0015] Preferably, a rotating shaft is provided at the center of the inner cavity of the outer shell, and the rotating shaft is connected to the rotating plate, and an arc-shaped rotating block is installed at the lower part of the rotating shaft. Arc-shaped side plates are provided on both sides of the lower part of the inner cavity of the outer shell, and a conical plug rod is connected to the outer center of the arc-shaped side plates. A return spring is provided between the arc-shaped side plates and the conical plug rod, and the outer end of the conical plug rod extends outward through the inner wall of the outer shell. The rotating plate drives the rotating shaft and the arc-shaped rotating block to rotate in the inner cavity of the outer shell on the first flange, so that the arc-shaped rotating block squeezes the arc-shaped side plates, and the arc-shaped side plates drive the conical plug rod to move toward the outside of the outer shell and connect with the corresponding first flange. After the arc-shaped rotating block finishes squeezing the arc-shaped side plates, the arc-shaped side plates and the conical plug rod are reset under the action of the return spring. Compared with the traditional connection method using a threaded structure, this structure is easy to use and replace, and the connection is more stable.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the present invention provides a device for balancing the pressure on both sides of a butterfly valve in an exhaust system, which has the following beneficial effects:

[0018] This device for balancing the pressure on both sides of a butterfly valve in an exhaust system first connects a pressure balancing valve to both sides of the butterfly valve via a connecting pipe, and a pressure differential sensor is installed on both sides of the butterfly valve pipe. The pressure balancing valve monitors the pressure on both sides of the exhaust system butterfly valve by reading the value of the pressure differential sensor. When the pressure differential exceeds a set value, the pressure balancing valve is opened to balance the pressure on both sides of the exhaust system butterfly valve, and then the exhaust system butterfly valve is assisted in opening, thereby preventing damage to the exhaust system butterfly valve. Not only is the device highly reliable and can monitor the pressure differential in real time, but when the exhaust system butterfly valve needs to be opened, it determines whether the pressure differential exceeds the limit value and then opens the pressure balancing valve to balance the pressure on both sides. At other times, the pressure balancing valve is closed, thereby preventing exhaust gas from entering and affecting the performance of the exhaust system. It also provides excellent safety. By balancing the pressure on both sides, it prevents damage to the butterfly valve caused by an excessive pressure differential when the exhaust system butterfly valve is opened. It is also easy to operate, and both the pressure differential monitoring of the pressure differential sensor and the opening of the pressure balancing valve can be controlled by a computer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the upper connecting pipe and lower connecting pipe structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the outer shell of the utility model;

[0022] Figure 4 This is a schematic diagram of the separation structure of the side extension plate and the fixed plug column of the utility model.

[0023] In the figure: 1. Pressure balancing valve; 2. Connecting pipe; 3. Pressure differential sensor; 4. Butterfly valve; 5. Upper connecting pipe; 6. Lower connecting pipe; 7. First flange; 8. Second flange; 9. Bolt; 10. Nut; 11. Rotating plate; 12. Outer shell; 13. Rotating shaft; 14. Arc-shaped rotating block; 15. Arc-shaped side plate; 16. Conical plug rod; 17. Reset spring; 18. Side extension plate; 19. Fixed plug column; 20. Limit side block; 21. Limit side groove. DETAILED DESCRIPTION

[0024] The following will be combined with the 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.

[0025] The utility model provides a technical solution, a device for balancing the pressure on both sides of the butterfly valve of the exhaust system, comprising: Figure 1 , a pressure balancing valve 1, and a connecting pipe 2 arranged on one side of the pressure balancing valve 1, and a butterfly valve 4 is additionally provided on the other side of the pressure balancing valve 1;

[0026] The differential pressure sensor 3 is installed on the outside of the connecting pipe 2. The pressure balancing valve 1 is first connected to both sides of the butterfly valve 4 via the connecting pipe 2, and the differential pressure sensor 3 is installed on both sides of the butterfly valve 4 pipeline. The pressure balancing valve 1 monitors the pressure on both sides of the exhaust system butterfly valve 4 by reading the value of the differential pressure sensor 3. When the pressure difference exceeds the set value, the pressure balancing valve 1 is opened to balance the pressure on both sides of the exhaust system butterfly valve 4, and then the exhaust system butterfly valve 4 is assisted to open, thereby preventing damage to the exhaust system butterfly valve 4.

[0027] See also Figure 2 The connecting pipe 2 consists of an upper connecting pipe 5 and a lower connecting pipe 6, with a first flange 7 and a second flange 8 respectively installed between the upper connecting pipe 5 and the lower connecting pipe 6. The upper connecting pipe 5 and the lower connecting pipe 6 are connected by the first flange 7 and the second flange 8. Bolts 9 are vertically installed around the top of the second flange 8, and nuts 10 are threadedly connected to the lower outer surface of the bolts 9. The second flanges 8 of the upper connecting pipe 5 and the lower connecting pipe 6 are connected by bolts 9 and nuts 10.

[0028] See also Figure 4, the outer shell 12 is evenly inserted around the top of the first flange 7, and a rotating plate 11 is added to the top of the outer shell 12, and the rotating plate 11 fits in place with the top of the first flange 7. The rotating plate 11 rotates on the top of the first flange 7. Side extension plates 18 are installed at the centers of both sides of the rotating plate 11, and a fixed column 19 is inserted at the top center of the side extension plate 18, and a limiting side groove 21 is opened on both sides of the top center of the side extension plate 18, and a limiting side block 20 is installed at the center of the surface of the fixed column 19. When the rotating plate 11 rotates on the top of the first flange 7, the bottom end of the fixed column 19 is inserted into the interior of the first flange 7 through the side extension plate 18 for connection, and the fixed column 19 is rotated on the side extension plate 18, so that the limiting side block 20 and the limiting side groove 21 are misaligned, which not only connects the rotating plate 11 to the first flange 7, but also ensures the stability of the connection between the rotating plate 11 and the first flange 7.

[0029] See also Figure 3 A rotating shaft 13 is added to the center of the inner cavity of the outer shell 12, and the rotating shaft 13 is connected to the rotating plate 11, and an arc-shaped rotating block 14 is installed at the lower part of the rotating shaft 13. Arc-shaped side plates 15 are added on both sides of the lower part of the inner cavity of the outer shell 12, and the outer center of the arc-shaped side plates 15 is connected to a conical plug rod 16, and a return spring 17 is added between the arc-shaped side plates 15 and the conical plug rod 16, and the outer end of the conical plug rod 16 passes through the inner wall of the outer shell 12 and extends outward. The rotating plate 11 drives the rotating shaft 13 and the arc-shaped rotating block 14 to rotate in the inner cavity of the outer shell 12 on the first flange 7, so that the arc-shaped rotating block 14 squeezes the arc-shaped side plate 15, and the arc-shaped side plate 15 drives the tapered insertion rod 16 to move to the outside of the outer shell 12 and connect with the corresponding first flange 7. After the arc-shaped rotating block 14 completes squeezing of the arc-shaped side plate 15, the arc-shaped side plate 15 and the tapered insertion rod 16 are reset under the action of the reset spring 17. Compared with the traditional method of using a threaded structure for connection, this structure is easy to use and replace, and the connection is more stable.

[0030] This solution involves connecting a pressure-balancing valve 1 to both sides of a butterfly valve 4 via a connecting pipe 2. A pressure differential sensor 3 is installed on both sides of the butterfly valve 4 pipe. The pressure-balancing valve 1 monitors the pressure on both sides of the exhaust system butterfly valve 4 by reading the value from the pressure differential sensor 3. When the pressure differential exceeds the set value, the pressure-balancing valve 1 opens to equalize the pressure on both sides of the exhaust system butterfly valve 4, assisting in the opening of the exhaust system butterfly valve 4 and preventing damage to the exhaust system butterfly valve 4. The second flange 8 of the upper connecting pipe 5 and the lower connecting pipe 6 are connected using bolts 9 and nuts 10. When the upper connecting pipe 5 and the lower connecting pipe 6 are connected through the first flange 7, after the rotating plate 11 has completed its rotation at the top of the first flange 7, the bottom end of the fixed plug 19 is inserted into the interior of the first flange 7 through the side extension plate 18 for connection, and the fixed plug 19 is rotated on the side extension plate 18, so that the limiting side block 20 and the limiting side groove 21 are misaligned. The rotating plate 11 drives the rotating shaft 13 and the arc-shaped rotating block 14 to rotate in the inner cavity of the outer shell 12 on the first flange 7, so that the arc-shaped rotating block 14 squeezes the arc-shaped side plate 15, and the arc-shaped side plate 15 drives the conical plug rod 16 to move to the outside of the outer shell 12 and connect with the corresponding first flange 7. After the arc-shaped rotating block 14 completes squeezing the arc-shaped side plate 15, the arc-shaped side plate 15 and the conical plug rod 16 are reset under the action of the reset spring 17.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although the 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 device for balancing the pressure on both sides of a butterfly valve in an exhaust system, characterized in that: include: A pressure balancing valve (1), and a connecting pipe (2) provided on one side of the pressure balancing valve (1), and a butterfly valve (4) is additionally provided on the other side of the pressure balancing valve (1); The differential pressure sensor (3) is arranged outside the connecting pipeline (2).

2. A device for balancing the pressure on both sides of a butterfly valve in an exhaust system according to claim 1, characterized in that: The connecting pipeline (2) is composed of an upper connecting pipe (5) and a lower connecting pipe (6), and a first flange (7) and a second flange (8) are respectively provided between the upper connecting pipe (5) and the lower connecting pipe (6).

3. The device for balancing the pressure on both sides of a butterfly valve in an exhaust system according to claim 2, characterized in that: Bolts (9) are vertically provided around the top of the second flange (8), and nuts (10) are threadedly connected to the lower portion of the outer surface of the bolts (9).

4. The device for balancing the pressure on both sides of a butterfly valve in an exhaust system according to claim 2, characterized in that: An outer shell (12) is evenly inserted around the top of the first flange (7), and a rotating plate (11) is added to the top of the outer shell (12), and the rotating plate (11) is fitted with the top of the first flange (7).

5. The device for balancing the pressure on both sides of a butterfly valve in an exhaust system according to claim 4, characterized in that: Side extension plates (18) are installed at the centers of both sides of the rotating plate (11), and a fixed plug post (19) is inserted at the top center of the side extension plate (18). Limited side grooves (21) are opened on both sides of the top center of the side extension plate (18), and a limited side block (20) is installed at the surface center of the fixed plug post (19).

6. The device for balancing the pressure on both sides of a butterfly valve in an exhaust system according to claim 5, characterized in that: A rotating shaft (13) is provided at the center of the inner cavity of the outer shell (12), and the rotating shaft (13) is connected to the rotating plate (11), and an arc-shaped rotating block (14) is installed at the lower part of the rotating shaft (13). Arc-shaped side plates (15) are provided on both sides of the lower part of the inner cavity of the outer shell (12), and a conical plug rod (16) is connected to the outer center of the arc-shaped side plate (15), and a return spring (17) is provided between the arc-shaped side plate (15) and the conical plug rod (16), and the outer end of the conical plug rod (16) passes through the inner wall of the outer shell (12) and extends outward.

Images