Synchronous double-shaft butterfly valve for opening and closing vertical pipeline

Abstract

The utility model provides a synchronous double-shaft butterfly valve for opening and closing a vertical pipeline. A driving rotating shaft and a driven rotating shaft are installed on a valve body of the butterfly valve, a left butterfly plate is welded to the driving rotating shaft, a right butterfly plate is welded to the driven rotating shaft, the driving rotating shaft and the driven rotating shaft penetrate through the valve body through preformed holes in the valve body, bearing pack mechanisms are installed at the two ends of the driving rotating shaft and the two ends of the driven rotating shaft respectively, and transmission gears are installed at the tops of the driving rotating shaft and the driven rotating shaft. The tops of the driving rotating shaft and the driven rotating shaft are sleeved with a protective cover, and the lower end of the driving rotating shaft is connected with an actuator. The discharging sealing plate is installed on one side of the rotating shaft, the sealing strip is welded to the other side of the rotating shaft, and the sealing plate is welded to the closing position of the butterfly plate. According to the butterfly valve, an existing single-dish-plate opening and closing mode is changed into a double-dish-plate opening and closing mode, the double dish plates are synchronously opened and closed in the same direction through a gear transmission mode, the flow of fluid is controlled through the two rotating dish plates, the operation mode is flexible, and the requirements of different working conditions can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery and valves, in particular to a synchronous double-axis butterfly valve used for vertical pipeline switching. Background Art

[0002] The butterfly valve is a commonly used rotary valve that opens or closes the flow of media by rotating the butterfly plate. The butterfly plate is the core component of the butterfly valve, usually made of cast iron, cast steel, stainless steel and other materials, and has the characteristics of corrosion resistance and wear resistance. There are two ways to rotate the butterfly plate: center rotation and lateral rotation. The center rotation butterfly valve has a simple structure and low cost, while the lateral rotation butterfly valve has better flow resistance performance. The main advantages of the butterfly valve are simple structure, light weight, easy maintenance, small flow resistance and large flow capacity. Therefore, butterfly valves are widely used in chemical, petroleum, electric power, metallurgy and other fields to control the flow of media such as gas, liquid and steam.

[0003] The selection of butterfly valves needs to be based on working conditions and usage requirements, mainly considering factors such as caliber, pressure level, connection method, material, etc. When selecting a butterfly valve, you also need to pay attention to its applicable working environment and medium to ensure its normal operation and service life. The maintenance of butterfly valves is also very important, and the valves need to be checked and cleaned regularly to ensure their normal operation. At the same time, you also need to pay attention to the operation methods and precautions to avoid safety accidents caused by improper operation. Summary of the invention

[0004] The purpose of the utility model is to provide a synchronous double-axis butterfly valve for vertical pipeline switching. The technical problems to be solved by the utility model are: changing the traditional single disc plate switching mode to a double disc plate switching mode, using the gear transmission mode to enable the double disc plates to achieve synchronous switching in the same direction, and facilitating the opening of the butterfly valve by the weight of the disc plate itself, so that the medium flow is smoother; solving the technical problems that the time in the vertical pipeline is too long, the solid particles in the flue gas accumulate too much, causing the valve to be unable to open and close normally, and at the same time causing damage to the valve plate and the actuator, which greatly reduces the service life of the butterfly valve.

[0005] To achieve the above purpose, the technical solution of the utility model is:

[0006] A synchronous double-axis butterfly valve for vertical pipeline switching, comprising: a valve body, a right disc plate, a driven shaft, an actuator, a driving shaft, a left disc plate, a protective cover, a transmission gear, a bearing group mechanism, and a sealing mechanism, wherein the bearing group mechanism comprises: a lower bearing group of the driven shaft, a lower bearing group of the driving shaft, an upper bearing group of the driving shaft, and an upper bearing group of the driven shaft; the sealing mechanism comprises: a discharge sealing plate, a sealing plate, and a sealing strip; the butterfly valve is provided with a driving shaft and a driven shaft installed on the valve body, the driving shaft is welded with a left disc plate, the driven shaft is welded with a right disc plate, the driving shaft and the driven shaft pass through the valve body through a reserved hole on the valve body, bearing group mechanisms are installed at both ends of the driving shaft and the driven shaft, transmission gears are installed on the top of the driving shaft and the driven shaft, protective covers are installed on the top of the driving shaft and the driven shaft, and the lower end of the driving shaft is connected to the actuator.

[0007] The driven shaft lower bearing group of the bearing group mechanism in the butterfly valve is installed at the lower end of the driven rotating shaft, the driving shaft lower bearing group is installed at the lower end of the driving rotating shaft, the driving shaft upper bearing group is installed at the upper end of the driving rotating shaft, and the driven shaft upper bearing group is installed at the upper end of the driven rotating shaft.

[0008] The unloading sealing plate of the sealing mechanism in the butterfly valve is installed on one side of the driving shaft and the driven shaft, the sealing strip is welded on the other side of the driving shaft and the driven shaft, and the sealing plate is welded on the closed position of the left disc plate and the right disc plate on the valve body.

[0009] The bearing group involved in the butterfly valve includes a bearing and a bearing seat, and the transmission gear includes two or more meshing gears.

[0010] Compared with the prior art, the positive effects of the utility model are:

[0011] 1. The butterfly valve changes the existing single disc switch mode to a double disc switch mode. The gear transmission mode is used to make the double discs switch synchronously in the same direction. The flow of the fluid is controlled by two rotating discs. The operation mode is flexible to meet the needs of different working conditions.

[0012] 2. The streamlined design of the butterfly valve facilitates the opening of the butterfly valve through the weight of the disc plate, so that the fluid encounters less resistance when passing through the valve, the fluid resistance is small, and the medium flow is smoother;

[0013] 3. The sealing design and sealing materials used in the butterfly valve can ensure good sealing performance and effectively prevent fluid leakage in the butterfly valve;

[0014] 4. The valve plate and sealing ring of the butterfly valve are made of wear-resistant materials, which are wear-resistant, long-lasting and have a long service life;

[0015] 5. This butterfly valve is suitable for various media. Its sealing material and valve body material can be selected according to actual needs, and it has a wide range of applications;

[0016] 6. The butterfly valve can precisely control the flow rate of the fluid by controlling the rotation angle of the disc plate to achieve accurate flow control;

[0017] 7. Compared with other valves, this butterfly valve has lower investment and can reduce the production cost of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technology of the utility model, the drawings required for use in the implementation are briefly introduced. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] The structures, proportions, sizes, etc. of the drawings shown in this specification are only used to match the contents disclosed in the specification so as to facilitate the understanding and reading of those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment in size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the technology of the present invention.

[0020] Figure 1 , schematic diagram of the main structure of the vertical pipeline switch synchronous double-axis butterfly valve;

[0021] Figure 2 ,for Figure 1 Schematic diagram of the structure in the AA direction.

[0022] In the figure: 1, valve body, 2, right disc plate, 3, driven shaft, 4, lower bearing group of driven shaft, 5, actuator, 6, lower bearing group of driving shaft, 7, driving shaft, 8, left disc plate, 9, upper bearing group of driving shaft, 10, protective cover, 11, transmission gear, 12, upper bearing group of driven shaft, 13, unloading sealing plate, 14, sealing plate, 15, sealing strip. DETAILED DESCRIPTION

[0023] The technical solution of the present utility model is further described clearly and completely below in conjunction with the accompanying drawings.

[0024] See attached Figure 1-2, installation and connection of the device, weld the two sealing plates 14 to the closed positions of the left disc plate 8 and the right disc plate 2 on the inner wall of the valve body 1 respectively. The left disc plate 8 is welded to the driving shaft 7, and the right disc plate 2 is welded to the driven shaft 3. The driving shaft 7 and the driven shaft 3 are passed through the upper and lower ends of the valve body 1 through the reserved holes on the valve body 1, and the sealing strip 15 is welded to one side of the driving shaft 7 and the driven shaft 3. The driven shaft lower bearing group 4 is installed at the lower end of the driven shaft 3, the driving shaft lower bearing group 6 is installed at the lower end of the driving shaft 7, the driving shaft upper bearing group 9 is installed at the upper end of the driving shaft 7, and the driven shaft upper bearing group 12 is installed at the upper end of the driven shaft 3. The transmission gear 11 is installed on the upper part of the driving shaft upper bearing group 9 and the driven shaft upper bearing group 12, and the protective cover 10 is sleeved on the outside of the transmission gear 11, the driving shaft upper bearing group 9 and the driven shaft upper bearing group 12. The driven shaft lower bearing group 4 is installed at the lower end of the driven shaft 3, and the driving shaft lower bearing group 6 is installed at the lower end of the driving shaft 7. When the left disc plate 8 and the right disc plate 2 are closed, the unloading sealing plate 13 is installed on the side of the driving shaft 7 and the driven shaft 3 corresponding to the sealing strip 15. The installed synchronous dual-axis switch butterfly valve is placed in the vertical pipeline, and finally the lower end of the driving shaft 7 is connected to the actuator 5.

[0025] When in use, the actuator 5 starts to move, the actuator 5 drives the active shaft 7 to rotate, the transmission gear installed on the active shaft 7 synchronously drives the driven shaft 3 to rotate, and the left disc plate 8 and the right disc plate 2 welded on the active shaft 7 and the driven shaft 3 move synchronously.

[0026] When the active rotating shaft 7 and the driven rotating shaft 3 drive the left disc plate 8 and the right disc plate 2 to the closed state synchronously with the actuator 5, the left disc plate 8 and the right disc plate 2 are tightly attached to the sealing plate 14, the discharge sealing plate 13 and the sealing strip 15, so that the butterfly valve is in a perfect sealing state.

[0027] When the active rotating shaft 7 and the driven rotating shaft 3 drive the left disc plate 8 and the right disc plate 2 to the open state synchronously with the actuator 5, the left disc plate 8 and the right disc plate 2 are opened downward at the same time, and the medium is allowed to flow in the vertical pipeline and the butterfly valve.

[0028] During the opening or closing process of the actuator 5, the transmission gear 11 follows the action synchronously, allowing the left disc plate 8 and the right disc plate 2 to hover at any angle within the travel range of the left disc plate 8 and the right disc plate 2 during the opening or closing process, so as to adjust the flow rate and speed of the medium passing through the vertical pipeline and the valve body 1 to meet various production needs.

[0029] The bearing groups installed at both ends of the driving shaft 7 and the driven shaft 3 are used to make the driving shaft 7, the driven shaft 3, the left disc plate 8, and the right disc plate 2 rotate more easily and flexibly. The protective cover 10 is used to protect the driving shaft 7, the driven shaft 3, the transmission gear 11, the bearing group 9 on the driving shaft, and the bearing group 12 on the driven shaft.

[0030] The above is only a non-limiting implementation method of the utility model, and a large number of embodiments can be derived. For ordinary technicians in this field, without departing from the creative concept of the present invention and without making creative work, several modified and improved embodiments can be made, which all fall within the scope of protection of the present invention.

Claims

1. A synchronous double-axis butterfly valve for vertical pipeline switching, comprising: A valve body (1), a right disc plate (2), a driven shaft (3), an actuator (5), a driving shaft (7), a left disc plate (8), a protective cover (10), a transmission gear (11), a bearing assembly mechanism, and a sealing mechanism, wherein the bearing assembly mechanism comprises: a lower bearing assembly (4) of the driven shaft, a lower bearing assembly (6) of the driving shaft, an upper bearing assembly (9) of the driving shaft, and an upper bearing assembly (12) of the driven shaft; and the sealing mechanism comprises: a discharge sealing plate (13), a sealing plate (14), and a sealing strip (15), wherein the butterfly valve is characterized in that: the driving shaft (7) is installed on the valve body (1) ) and a driven shaft (3), the driving shaft (7) is welded with a left disc plate (8), the driven shaft (3) is welded with a right disc plate (2), the driving shaft (7) and the driven shaft (3) pass through the valve body (1) through a reserved hole on the valve body (1), both ends of the driving shaft (7) and the driven shaft (3) are equipped with bearing assembly mechanisms, the tops of the driving shaft (7) and the driven shaft (3) are equipped with transmission gears (11), the tops of the driving shaft (7) and the driven shaft (3) are covered with protective covers (10), and the lower end of the driving shaft (7) is connected to the actuator (5).

2. The synchronous double-axis butterfly valve for vertical pipeline switching according to claim 1 is characterized in that: The driven shaft lower bearing group (4) of the bearing group mechanism in the butterfly valve is mounted on the lower end of the driven rotating shaft (3), the driving shaft lower bearing group (6) is mounted on the lower end of the driving rotating shaft (7), the driving shaft upper bearing group (9) is mounted on the upper end of the driving rotating shaft (7), and the driven shaft upper bearing group (12) is mounted on the upper end of the driven rotating shaft (3).

3. The synchronous double-axis butterfly valve for vertical pipeline switching according to claim 1 is characterized in that: The discharge sealing plate (13) of the sealing mechanism in the butterfly valve is mounted on one side of the driving rotating shaft (7) and the driven rotating shaft (3), the sealing strip (15) is welded on the other side of the driving rotating shaft (7) and the driven rotating shaft (3), and the sealing plate (14) is welded on the closed position of the left disc plate (8) and the right disc plate (2) on the valve body (1).

Images