Low torque high sealing rotary eccentric butterfly valve

Abstract

This utility model relates to the field of rotary eccentric butterfly valve technology, specifically a low-torque, high-sealing rotary eccentric butterfly valve, including a main valve body with a top connecting seat fixedly connected to the top of the main valve body. This utility model, through the activation of the inlet and outlet pumps, circulates the coolant in the storage tank along the cooling cylinder, outlet pipe, and inlet pipe, improving the efficiency of the coolant in cooling the cooling cylinder. Simultaneously, by cooling the cooling cylinder, the aging effect of high temperatures on the sealing packing on the surface of the cooling cylinder is reduced, extending the service life of the sealing packing and improving the sealing performance of the rotary eccentric butterfly valve. Furthermore, the use of a barrier mesh on one side of the inlet valve pipe filters out hard particles in the medium, reducing wear on the metal sealing surface caused by sand or rust flakes from pipes, thus improving the sealing effect of the butterfly valve. At the same time, a stirring brush scrapes and agitates the surface of the barrier mesh, preventing particles from accumulating and clogging on the upstream side of the barrier mesh.

Description

Technical Field

[0001] This utility model relates to the field of rotary eccentric butterfly valve technology, specifically a low-torque, high-sealing rotary eccentric butterfly valve. Background Technology

[0002] A butterfly valve mainly consists of a valve body, a disc-shaped butterfly plate, a valve stem, and a sealing ring. It controls the flow of fluid or regulates the flow rate by rotating the valve stem to drive the butterfly plate to rotate. When open, the butterfly plate is parallel to the flow direction; when closed, the butterfly plate is perpendicular to the flow direction. The low-torque, high-sealing rotary eccentric butterfly valve achieves the two often contradictory goals of low operating torque and excellent sealing performance through its eccentric structure design.

[0003] In the prior art, patent application document "CN220505828U" discloses a "high-sealing valve"; it includes a butterfly valve flow-blocking element, a valve body, a pressure ring, a blind flange, and a packing cylinder. The butterfly valve flow-blocking element is movably connected to the valve body, and a double-layer sealing structure is formed at the connection between the butterfly valve flow-blocking element and the valve body. A packing cylinder and a blind flange are respectively installed at the top and bottom of the valve body to restrict the butterfly valve flow-blocking element's axial movement within the valve body. A pressure ring is installed at one end of the valve body passage, and the butterfly valve flow-blocking element cooperates with the pressure ring to block the valve body passage. The butterfly valve flow-blocking element of this utility model is a double-rotating eccentric butterfly valve relative to the valve body. The double-eccentric structure design results in low torque and minimal wear on the valve body. When replacing the pressure ring seal, the pressure ring can be disassembled without disassembling the valve stem and butterfly plate, making maintenance convenient. The valve stem seal adopts a double-sealing structure of O-ring and packing or spiral wound gasket, ensuring reliable control of external leakage.

[0004] The aforementioned "high-sealing valve" still has some drawbacks. For example, the valve shaft sealing packing of the rotary eccentric butterfly valve is a key component to ensure dynamic sealing between the valve stem and the valve body. However, the valve shaft sealing packing will age too quickly and become sticky when used at high temperatures for a long time. Furthermore, repeated temperature changes will also cause cracks, reducing the service life of the low-torque rotary eccentric butterfly valve.

[0005] Therefore, this utility model proposes a low-torque, high-sealing rotary eccentric butterfly valve to compensate for and improve the deficiencies of the prior art. Utility Model Content

[0006] In view of the shortcomings of the existing technology, this utility model provides a low-torque, high-sealing rotary eccentric butterfly valve, which can effectively solve the technical problem that valve shaft sealing packing will age too quickly and become sticky when used at high temperatures for a long time, and that repeated temperature changes will also cause cracks, reducing the service life of the low-torque rotary eccentric butterfly valve.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] This utility model discloses a low-torque, high-sealing rotary eccentric butterfly valve, comprising a main valve body, a top connecting seat fixedly connected to the top of the main valve body, a limit seat provided on the top of the top connecting seat, a valve shaft provided on the top of the top connecting seat, a butterfly valve fixedly connected to the bottom of the valve shaft, an inlet valve pipe fixedly connected to one side of the main valve body, a cooling cylinder provided at the bottom of the limit seat, an outlet pipe fixedly connected to one side of the cooling cylinder, an outlet pump provided on one side of the outlet pipe, a storage tank fixedly connected to one end of the outlet pipe, an inlet pipe fixedly connected to one side of the storage tank, an inlet pump provided on one side of the inlet pipe, and a filling pipe fixedly connected to the top of the storage tank.

[0009] Preferably, there are two liquid storage tanks, both of which are fixedly connected along both sides of the main valve body, and both of the liquid storage tanks are fixedly connected to the top of the main valve body with an inlet pipe and an outlet pipe.

[0010] Preferably, a heat exchange cylinder is fixedly connected to both the surface of the inlet pipe and the surface of the outlet pipe, a heat dissipation plate is fixedly connected to one side of the heat exchange cylinder, and a heat dissipation fin is fixedly connected to one side of the heat dissipation plate.

[0011] Preferably, a barrier mesh is fixedly connected to one side of the inlet valve pipe, and the barrier mesh is arranged parallel to one side of the main valve body.

[0012] Preferably, a limiting plate is fixedly connected to the inner side of the liquid inlet valve pipe, a bearing plate is movably connected to one side of the limiting plate, a side connecting rod is movably connected to one side of the bearing plate, and a guide vane is fixedly connected to one side of the side connecting rod.

[0013] Preferably, a transmission rod is fixedly connected to one side of the guide vane, an agitator is fixedly connected to one side of the transmission rod, and an agitator brush is fixedly connected to one side of the agitator.

[0014] Compared with known public technologies, the technical solution provided by this utility model has the following beneficial effects:

[0015] In this invention, a liquid outlet pump is used to draw the coolant inside the storage tank into the cooling cylinder along the liquid outlet pipe. After the coolant enters the cooling cylinder, it will reduce the temperature of the cooling cylinder and the sealing packing. At the same time, the liquid inlet pump is started to drive the coolant in the cooling cylinder to be drawn out into the storage tank along the liquid inlet pipe. By starting the liquid inlet pump and the liquid outlet pump, the coolant in the storage tank is circulated between the cooling cylinder, the liquid outlet pipe and the liquid inlet pipe, which improves the efficiency of the coolant in cooling the cooling cylinder.

[0016] In this invention, when the coolant circulates along the inner side of the inlet and outlet pipes, the coolant is cooled by a continuously cooling heat exchanger, which improves the temperature stability of the cooling cylinder, reduces the aging effect of high temperature on the sealing packing on the surface of the cooling cylinder, extends the service life of the sealing packing, and improves the sealing performance of the rotary eccentric butterfly valve.

[0017] In this invention, before the medium flows into the inner side of the main valve body along the inlet valve pipe, it is filtered by a barrier screen on one side of the inlet valve pipe to block hard particles in the medium, thereby reducing wear on the metal sealing surface caused by sand or rust and peeling off the pipe, and improving the sealing effect of the butterfly valve.

[0018] This invention utilizes rotating guide vanes to drive a transmission rod to rotate. The rotating transmission rod drives an agitator plate to move along one side of the barrier mesh. The agitator plate stirs up the accumulated impurities and particles, while the agitator brush scrapes and disturbs the surface of the barrier mesh to prevent particles from accumulating and clogging on the front side of the barrier mesh, maintaining the permeability of the barrier mesh and improving the flowability of the medium during filtration. Attached Figure Description

[0019] The present invention is further described with reference to embodiments illustrated in the following figures, wherein:

[0020] Figure 1 This is a structural diagram of the overall appearance of this utility model;

[0021] Figure 2 This is a structural diagram of the limiting plate of this utility model;

[0022] Figure 3 This is a structural diagram of the liquid storage tank of this utility model;

[0023] Figure 4 This is a structural diagram of the heat exchange cylinder of this utility model;

[0024] Figure 5 This is a structural diagram of the guide vane of this utility model.

[0025] The labels in the diagram represent:

[0026] 1. Main valve body; 2. Butterfly valve; 3. Valve shaft; 4. Top connecting seat; 5. Limit seat; 6. Inlet valve pipe; 701. Cooling cylinder; 702. Liquid filling pipe; 703. Liquid outlet pipe; 704. Liquid outlet pump; 705. Liquid storage tank; 706. Liquid inlet pipe; 707. Liquid inlet pump; 708. Heat exchange cylinder; 709. Heat dissipation plate; 7010. Heat dissipation fins; 801. Limit plate; 802. Bearing disc; 803. Side connecting rod; 804. Guide vane; 805. Transmission rod; 806. Stirring plate; 807. Stirring brush; 808. Barrier mesh. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The present invention will be further described below with reference to the embodiments.

[0029] The aforementioned low-torque, high-sealing rotary eccentric butterfly valve includes a main valve body 1. A top connecting seat 4 is fixedly connected to the top of the main valve body 1. A limit seat 5 is provided on the top of the top connecting seat 4. A valve shaft 3 is provided on the top of the top connecting seat 4. A butterfly valve 2 is fixedly connected to the bottom of the valve shaft 3. An inlet valve pipe 6 is fixedly connected to one side of the main valve body 1. A cooling cylinder 701 is provided at the bottom of the limit seat 5. An outlet pipe 703 is fixedly connected to one side of the cooling cylinder 701. An outlet pump 704 is provided on one side of the outlet pipe 703. A liquid storage tank 705 is fixedly connected to one end of the outlet pipe 703. An inlet pipe 706 is fixedly connected to one side of the liquid storage tank 705. An inlet pump 707 is provided on one side of the inlet pipe 706. A filling pipe 702 is fixedly connected to the top of the liquid storage tank 705.

[0030] It should be noted that when the coolant circulates along the inner side of the inlet pipe 706 and the outlet pipe 703, the coolant is cooled by the continuously cooling heat exchanger 708, which improves the temperature stability of the cooling cylinder 701, reduces the aging effect of high temperature on the sealing packing on the surface of the cooling cylinder 701, extends the service life of the sealing packing, and improves the sealing performance of the rotary eccentric butterfly valve.

[0031] In an optional embodiment, there are two liquid storage tanks 705, both of which are fixedly connected along both sides of the main valve body 1, and both of the liquid storage tanks 705 are fixedly connected to the top of an inlet pipe 706 and an outlet pipe 703.

[0032] It should be noted that the coolant in the cooling cylinder 701 is drawn out along the inlet pipe 706 by the inlet pump 707 and then into the storage tank 705. By starting the inlet pump 707 and the outlet pump 704, the coolant in the storage tank 705 is circulated along the cooling cylinder 701, the outlet pipe 703 and the inlet pipe 706. The two storage tanks 705 circulate the liquid, which improves the cooling efficiency.

[0033] In an optional embodiment: a heat exchange cylinder 708 is fixedly connected to both the surface of the inlet pipe 706 and the surface of the outlet pipe 703. A heat dissipation plate 709 is fixedly connected to one side of the heat exchange cylinder 708, and a heat dissipation fin 7010 is fixedly connected to one side of the heat dissipation plate 709.

[0034] It should be noted that heat dissipation is achieved through the heat dissipation plate 709 inside the heat exchange cylinder 708. Multiple heat dissipation fins 7010 are fixed on one side of the heat dissipation plate 709. The use of multiple heat dissipation fins 7010 increases the heat dissipation area and improves the heat dissipation efficiency of the heat exchange cylinder 708 and the heat dissipation plate 709.

[0035] In an optional embodiment: a barrier mesh 808 is fixedly connected to one side of the inlet valve pipe 6, and the side of the barrier mesh 808 is arranged parallel to one side of the main valve body 1.

[0036] It should be noted that the barrier screen 808 on one side of the inlet valve pipe 6 is used for filtration to block hard particles in the medium, thereby reducing wear on the metal sealing surface caused by sand or rust and peeling off the pipe.

[0037] In an optional embodiment: a limiting plate 801 is fixedly connected to the inner side of the inlet valve pipe 6, a bearing disk 802 is movably connected to one side of the limiting plate 801, a side connecting rod 803 is movably connected to one side of the bearing disk 802, and a guide vane 804 is fixedly connected to one side of the side connecting rod 803.

[0038] It should be noted that when the medium flows along the inlet valve pipe 6, it will impact the surface of the guide vane 804 and drive the guide vane 804 to rotate. The rotating guide vane 804 will be movably supported on one side of the bearing disk 802 through the side connecting rod 803. By utilizing the movable connection between the bearing disk 802 and one side of the limiting plate 801, the guide vane 804 and the side connecting rod 803 are kept rotating stably along the inlet valve pipe 6.

[0039] In an optional embodiment: a transmission rod 805 is fixedly connected to one side of the guide vane 804, an agitator 806 is fixedly connected to one side of the transmission rod 805, and an agitator brush 807 is fixedly connected to one side of the agitator 806.

[0040] It should be noted that the stirring plate 806 is used to stir the accumulated impurity particles, and at the same time, the stirring brush 807 is used to scrape and disturb the surface of the barrier net 808 to prevent particles from accumulating and clogging on the flow-facing side of the barrier net 808 and to maintain the permeability of the barrier net 808.

[0041] The complete working principle and steps of the above embodiments are as follows:

[0042] First, before using the main valve body 1, add coolant to the inside of the reservoir 705 along the filling pipe 702. The cooling cylinder 701 is a hollow metal sleeve. After fixing the cooling cylinder 701 to the inside of the top connecting seat 4, it is attached to the surface of the valve shaft 3. Then, multiple sealing packings are placed on the surface of the cooling cylinder 701, and the sealing packings and the cooling cylinder 701 are limited by the limiting seat 5.

[0043] By starting the outlet pump 704, the coolant inside the storage tank 705 is drawn into the cooling cylinder 701 along the outlet pipe 703. After the coolant enters the cooling cylinder 701, it will reduce the temperature of the cooling cylinder 701 and the sealing packing. At the same time, by starting the inlet pump 707, the coolant in the cooling cylinder 701 is drawn out along the inlet pipe 706 into the storage tank 705. Through the starting of the inlet pump 707 and the outlet pump 704, the coolant in the storage tank 705 is circulated between the cooling cylinder 701, the outlet pipe 703 and the inlet pipe 706, which improves the efficiency of the coolant in cooling the cooling cylinder 701.

[0044] Meanwhile, heat exchange cylinders 708 are fixedly sleeved on the surfaces of both the outlet pipe 703 and the inlet pipe 706. When the temperature of the coolant continues to rise, the circulating coolant will conduct the temperature to the surface of the heat exchange cylinder 708 and dissipate it through the heat dissipation plate 709 inside the heat exchange cylinder 708. Multiple heat dissipation fins 7010 are fixed on one side of the heat dissipation plate 709. The multiple heat dissipation fins 7010 increase the heat dissipation area and improve the heat dissipation efficiency of the heat exchange cylinder 708 and the heat dissipation plate 709. When the coolant circulates along the inside of the inlet pipe 706 and the outlet pipe 703, the continuously cooling heat exchange cylinder 708 cools the coolant, improves the temperature stability of the cooling cylinder 701, reduces the aging effect of high temperature on the sealing packing on the surface of the cooling cylinder 701, extends the service life of the sealing packing, and improves the sealing performance of the rotary eccentric butterfly valve.

[0045] When the butterfly valve is in use, before the medium flows into the inner side of the main valve body 1 along the inlet valve pipe 6, it is filtered by the barrier screen 808 on one side of the inlet valve pipe 6 to block hard particles in the medium, reduce the wear of metal sealing surface caused by sand or pipeline rust and peeling off, and improve the sealing effect of the butterfly valve 2.

[0046] When the medium flows along the inlet valve pipe 6, it impacts the surface of the guide vane 804 and causes the guide vane 804 to rotate. The rotating guide vane 804 is movably supported on one side of the bearing disk 802 by the side connecting rod 803. The rotation of the bearing disk 802 and the limiting plate 801 is maintained by the movable connection between the bearing disk 802 and the side connecting rod 803, ensuring stable rotation of the guide vane 804 and the side connecting rod 803 along the inlet valve pipe 6. The rotating guide vane 804 drives the transmission rod 805 to rotate, and the rotating transmission rod 805 drives the agitator 806 to move along one side of the barrier screen 808. The agitator 806 agitates the accumulated impurities and particles, and at the same time, the agitator brush 807 scrapes and disturbs the surface of the barrier screen 808 to prevent particles from accumulating and clogging on the front side of the barrier screen 808, maintaining the permeability of the barrier screen 808 and improving the flowability of the medium during filtration.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A low torque high sealing rotary eccentric butterfly valve comprising a main valve body (1) characterized in that: The top of the main valve body (1) is fixedly connected to a top connecting seat (4), the top of the top connecting seat (4) is provided with a limit seat (5), the top of the top connecting seat (4) is provided with a valve shaft (3), the bottom of the valve shaft (3) is fixedly connected to a butterfly valve (2), one side of the main valve body (1) is fixedly connected to an inlet valve pipe (6), the bottom of the limit seat (5) is provided with a cooling cylinder (701), one side of the cooling cylinder (701) is fixedly connected to an outlet pipe (703), one side of the outlet pipe (703) is provided with an outlet pump (704), one end of the outlet pipe (703) is fixedly connected to a liquid storage tank (705), one side of the liquid storage tank (705) is fixedly connected to an inlet pipe (706), one side of the inlet pipe (706) is provided with an inlet pump (707), and the top of the liquid storage tank (705) is fixedly connected to a liquid filling pipe (702).

2. The low torque high sealing rotary eccentric butterfly valve according to claim 1, wherein: There are two liquid storage tanks (705). Both liquid storage tanks (705) are fixedly connected along both sides of the main valve body (1), and the top of each liquid storage tank (705) is fixedly connected with an inlet pipe (706) and an outlet pipe (703).

3. The low torque high sealing rotary eccentric butterfly valve according to claim 2, wherein: A heat exchange cylinder (708) is fixedly connected to both the surface of the inlet pipe (706) and the surface of the outlet pipe (703). A heat dissipation plate (709) is fixedly connected to one side of the heat exchange cylinder (708), and a heat dissipation fin (7010) is fixedly connected to one side of the heat dissipation plate (709).

4. The low torque high sealing rotary eccentric butterfly valve according to claim 3, wherein: A barrier mesh (808) is fixedly connected to one side of the liquid inlet valve pipe (6), and one side of the barrier mesh (808) is arranged parallel to one side of the main valve body (1).

5. The low-torque, high-sealing rotary eccentric butterfly valve according to claim 4, characterized in that: A limiting plate (801) is fixedly connected to the inner side of the liquid inlet valve pipe (6). A bearing disk (802) is movably connected to one side of the limiting plate (801). A side connecting rod (803) is movably connected to one side of the bearing disk (802). A guide vane (804) is fixedly connected to one side of the side connecting rod (803).

6. The low-torque, high-sealing rotary eccentric butterfly valve according to claim 5, characterized in that: A transmission rod (805) is fixedly connected to one side of the guide vane (804), a stirring plate (806) is fixedly connected to one side of the transmission rod (805), and a stirring brush (807) is fixedly connected to one side of the stirring plate (806).

Images