Electric high-temperature gas butterfly valve

Abstract

The invention relates to the technical field of valves, in particular to an electric high-temperature gas butterfly valve which comprises a valve body, a valve plate and a valve shaft, and an electric actuator is coaxially arranged at the upper end of the valve shaft in a transmission mode. An upper valve seat and a lower valve seat for accommodating the valve shaft are respectively arranged at the upper end and the lower end of the valve body; a heat exchange seat is hermetically arranged at the upper end of the upper valve seat; an upper sealing assembly is arranged in the upper valve seat and the heat exchange seat, a lower sealing assembly is arranged in the lower valve seat, and the upper sealing assembly and the lower sealing assembly are used for sealing materials in the valve body to prevent leakage and limiting the axis of the valve shaft. A liquid inlet hole and a liquid outlet hole are formed in the side wall of the heat exchange base in a penetrating mode and used for supplying cooled heat conduction oil to the heat exchange base in a circulating mode. The electric high-temperature gas butterfly valve has the cooling function, and heat conduction is reduced; the sealing form is improved, and a bearing part is omitted; and the service life of the butterfly valve under the high-temperature working condition is greatly prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to an electric high-temperature gas butterfly valve. Background Art

[0002] Butterfly valve is a stop valve that isolates or regulates the flow of fluid. Its closing mechanism is disc-shaped, so it is called a butterfly valve. Butterfly valves are widely used in the pharmaceutical, chemical and food industries. Compared with other forms of stop valves, such as ball valves, butterfly valves, and plug valves, butterfly valves have a simpler structure and are easier to clean after removal. High-temperature butterfly valves are used when the internal fluid is a high-temperature substance, such as steam, thermal oil, and high-temperature gas.

[0003] At present, due to the limitations of the use scenarios of high-temperature butterfly valves, the actuators of high-temperature butterfly valves are usually pneumatic in order to avoid damage to the electrical components of electric actuators caused by high temperatures; however, pneumatic actuators have the defect of low torque. The sealing fillers at the valve shaft of conventional high-temperature butterfly valves are generally made of modified polymer materials and graphite materials. However, the sealing fillers of conventional high-temperature butterfly valves still have some shortcomings: the thermal expansion coefficients of modified polymer materials and graphite materials are different from the thermal expansion coefficients of the metal materials of the valve body and valve shaft. Long-term high-temperature working conditions will cause irreversible changes in the volume of the sealing fillers, resulting in material leakage in the high-temperature butterfly valve; especially when the production is resumed after shutdown for maintenance. In addition, high-temperature working conditions will also accelerate the carbonization of the bearing grease at the valve shaft of the high-temperature butterfly valve, further reducing the service life of the high-temperature butterfly valve. Summary of the invention

[0004] In order to solve the technical problems existing in the background technology, the electric high-temperature gas butterfly valve provided by the present invention has a cooling function to reduce heat conduction; improves the sealing form and omits the bearing component; and greatly prolongs the service life of the butterfly valve under high temperature conditions.

[0005] The technical solution adopted by the present invention is:

[0006] An electric high-temperature gas butterfly valve comprises: a valve body, wherein a valve plate is sealed in the valve body, a valve shaft is penetrated in the valve plate, and an electric actuator is coaxially transmitted on the upper end of the valve shaft; an upper valve seat and a lower valve seat for accommodating the valve shaft are respectively provided at the upper and lower ends of the valve body, and a heat exchange seat is sealed on the upper end of the upper valve seat; an upper sealing assembly is provided in the upper valve seat and the heat exchange seat, and a lower sealing assembly is provided in the lower valve seat, and the upper sealing assembly and the lower sealing assembly are used to seal the material in the valve body to prevent leakage and limit the axis of the valve shaft; a liquid inlet hole and a liquid discharge hole are penetrated on the side wall of the heat exchange seat, and the liquid inlet hole and the liquid discharge hole are used to circulate and supply cooling heat transfer oil to the heat exchange seat.

[0007] Furthermore, a temperature sensor is provided in communication with the drainage hole to monitor the working condition of the butterfly valve.

[0008] Furthermore, reinforcing ribs are provided between the side wall of the upper valve seat and the outer wall of the valve body.

[0009] Furthermore, the upper sealing assembly comprises:

[0010] The sealing sleeve is arranged on the upper moving ring on the upper part of the valve shaft, and a cone ring is protruding from the upper end of the upper moving ring;

[0011] An upper baffle and a lower baffle are respectively arranged at the upper and lower parts of the heat exchange seat. An annular conical groove is arranged at the lower end of the lower baffle, and the conical groove is sealed with the conical ring. An oil seal ring sealed with the valve shaft is arranged at the center of the upper end of the upper baffle, and an oil seal gland abutting against the oil seal ring is fixedly arranged on the upper baffle.

[0012] Furthermore, annular grooves are provided on the contact surfaces of the upper valve seat and the heat exchange seat to improve the sealing performance.

[0013] Furthermore, the cone rings are provided in two groups, and the taper of the upper ones is smaller than the taper of the lower ones.

[0014] Furthermore, the conical groove is provided with a perforation group penetrating the lower partition.

[0015] Furthermore, a connecting spline is coaxially arranged on the upper end of the valve shaft, and the connecting spline is drivingly connected to the electric actuator.

[0016] Furthermore, the lower sealing assembly comprises:

[0017] The sealing sleeve is arranged on the conical lower moving ring at the lower part of the valve shaft, the lower moving ring is accommodated in the lower valve seat, and the lower end of the valve shaft is threadedly provided with a thrust assembly abutting against the lower moving ring;

[0018] The lower end of the lower valve seat is sealed with a lower sealing cover, and the upper end of the lower sealing cover is protrudingly provided with a cone sleeve, and the cone sleeve is sealed and connected with the cone wall of the lower moving ring.

[0019] Furthermore, an annular groove is provided on the contact surface of the lower valve seat and the lower sealing cover to improve the sealing performance.

[0020] The beneficial effects of the electric high-temperature gas butterfly valve of the present invention are:

[0021] 1. The pump shaft temperature in the heat exchange seat is reduced through the liquid inlet and outlet holes to prevent heat from being transferred from the pump shaft to the electric actuator; and the working status of the high-temperature butterfly valve can also be monitored through temperature data;

[0022] 2. The valve shaft is sealed through the upper sealing component and the lower sealing component, and the traditional bearing form is replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation of the present invention, the drawings required in the specific implementation are briefly introduced below. The drawings in the following description are implementations of the present invention.

[0024] Figure 1 It is a general stereoscopic schematic diagram of the present invention;

[0025] Figure 2 It is a general front view schematic diagram of the present invention;

[0026] Figure 3 is a general side schematic view of the present invention;

[0027] Figure 4 The present invention Figure 2 Schematic diagram of the cross section of the AA section;

[0028] Figure 5 The present invention Figure 3 Schematic diagram of the cross section of the BB part.

[0029] In the figure:

[0030] 10. Valve body, 11. Valve plate, 12. Valve shaft,

[0031] 21. Upper valve seat, 210. Upper moving ring, 211. Cone ring,

[0032] 22, heat exchange seat, 220, lower baffle, 221, cone groove, 222, perforation group, 223, upper baffle, 224, oil seal ring, 225, oil seal gland, 226, liquid inlet hole, 227, liquid drain hole, 228, connecting spline,

[0033] 23. Lower valve seat, 230. Lower moving ring, 231. Thrust assembly, 232. Lower cover, 233. Cone sleeve,

[0034] 3. Electric actuator. DETAILED DESCRIPTION

[0035] In order to more clearly and specifically explain the specific implementation purpose and implementation mode of the present invention, the technical solution of the present invention will be fully described below. The described embodiments are part of the embodiments of the present invention, but not all of them. Without making creative work, all other embodiments based on the embodiments described in the present invention belong to the protection scope of the present invention.

[0036] The electric high-temperature gas butterfly valve of the present invention is as follows Figure 1 , Figure 2 , Figure 3As shown, it comprises: a valve body 10, a valve plate 11 is sealed in the valve body 10, a valve shaft 12 is penetrated in the valve plate 11, and an electric actuator 3 is coaxially driven on the upper end of the valve shaft 12.

[0037] An upper valve seat 21 for accommodating the valve shaft 12 is provided at the upper end of the valve body 10, and reinforcing ribs are provided between the side wall of the upper valve seat 21 and the outer wall of the valve body 10; a heat exchange seat 22 is sealed at the upper end of the upper valve seat 21, and an annular groove is provided on the contact surface of the upper valve seat 21 and the heat exchange seat 22 to improve the sealing performance, and the upper end of the heat exchange seat 22 is used to fix the electric actuator 3.

[0038] The upper valve seat 21 and the heat exchange seat 22 are provided with an upper sealing assembly, which is used to seal the material in the valve body 10 to prevent leakage and limit the upper part of the valve shaft 12. Figure 4 As shown, including:

[0039] The sealing sleeve is arranged on the upper movable ring 210 on the upper part of the valve shaft 12, and the upper movable ring 210 is accommodated in the upper valve seat 21. The upper end of the upper movable ring 210 is protruded with a cone ring 211, and the cone ring 211 is accommodated in the heat exchange seat 22. The cone ring 211 is provided with two groups, and the taper of the upper cone ring 211 is smaller than the taper of the lower cone ring 211, so that after the cone ring 211 is heated and expanded, it provides a change space for the lower cone ring 211 with a larger thermal expansion variable, thereby improving the sealing performance; a lower partition plate 220 is arranged at the lower part of the heat exchange seat 22, and an axial hole for penetrating the valve shaft 12 is arranged in the center of the lower partition plate 220, and a gap is set between the axial hole and the valve shaft 12, and an annular cone groove 221 is arranged at the lower end of the lower partition plate 220, and the cone groove 221 is sealed and connected with the cone ring 211, and a The perforated group 222 of the plate 220, the upper part of the heat exchange seat 22 is provided with an upper partition 223, and an oil seal ring 224 sealed and connected to the valve shaft 12 is provided in the center of the upper end of the upper partition 223. The oil seal ring 224 is coaxially stacked and arranged in multiples, and an oil seal gland 225 abutting against the oil seal ring 224 is fixedly arranged on the upper partition 223; a liquid inlet hole 226 and a liquid discharge hole 227 are penetrated on the side wall of the heat exchange seat 22 between the upper partition 223 and the lower partition 220, and the liquid inlet hole 226 and the liquid discharge hole 227 are used to circulate and supply cooling heat transfer oil to the heat exchange seat 22, and a temperature sensor is connected to the liquid discharge hole 227 to monitor the working condition of the butterfly valve; a connecting spline 228 is coaxially arranged on the upper end of the valve shaft 12, and the connecting spline 228 is transmission-connected to the electric actuator 3.

[0040] A lower valve seat 23 for accommodating the valve shaft 12 is disposed below the valve body 10. A lower sealing component is disposed in the lower valve seat 23. The lower sealing component is used to limit the lower portion of the valve shaft 12. Figure 5 As shown, including:

[0041] A sealing sleeve is arranged on a conical lower movable ring 230 at the lower part of the valve shaft 12, and the lower movable ring 230 is accommodated in the lower valve seat 23. The lower end of the valve shaft 12 is threadedly provided with a thrust assembly 231 abutting against the lower movable ring 230; a lower end sealing member 232 is provided for sealing at the lower end of the lower valve seat 23, and an annular groove is provided on the contact surface between the lower movable ring 232 and the lower valve seat 23 to improve the sealing performance; a conical sleeve 233 is protruding from the upper end of the lower movable ring 232, and the conical sleeve 233 is sealingly connected to the conical wall of the lower movable ring 230.

[0042] According to the specific structure of the electric high-temperature gas butterfly valve in the above embodiment, the thermal expansion under high-temperature working conditions is further described below:

[0043] The lower sealing assembly limits the pump shaft 12 so that the thermal expansion tendency of the pump shaft 12 extends upward along its axial direction. The upwardly extending pump shaft 12 causes the conical groove 221 to approach the conical ring 211, increasing the torque of the rotating pump shaft 12, so that the electric actuator 3 cannot smoothly open and close the high-temperature butterfly valve. The valve body 10 is made of metal, and the thermal expansion caused by the heat offsets the thermal expansion of the conical ring 211 approaching the conical groove 221 caused by the thermal expansion of the pump shaft 12.

[0044] The thermal expansion of the conical groove 221 and the conical ring 211 makes the contact parts of the two fit more closely, increasing the torque of the rotating pump shaft 12, so that the electric actuator 3 cannot smoothly open and close the high-temperature butterfly valve. The cone angle of the lower part of the conical ring 211 is larger, providing space for thermal expansion of the conical ring 211; the gap between the shaft hole in the center of the lower partition 220 and the valve shaft 12 is set to increase the radial thermal expansion space of the conical groove 221 and the conical ring 211.

[0045] The above structure can effectively control the fit tightness of the cone groove 221 and the cone ring 211 , so that the torque required to rotate the valve shaft 12 under high temperature conditions is within the working torque range of the electric actuator 3 .

[0046] Based on the above, the embodiments of the electric high temperature gas butterfly valve of the present invention are used as inspiration. Through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of ​​the present invention. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. Electric high temperature gas butterfly valve, including: A valve body (10), wherein a valve plate (11) is sealed inside the valve body (10), a valve shaft (12) is penetrated through the valve plate (11), and an electric actuator (3) is coaxially driven at the upper end of the valve shaft (12), characterized in that: An upper valve seat (21) and a lower valve seat (23) for accommodating the valve shaft (12) are respectively disposed at the upper and lower ends of the valve body (10); a heat exchange seat (22) is sealed at the upper end of the upper valve seat (21); An upper sealing assembly is disposed in the upper valve seat (21) and the heat exchange seat (22), and a lower sealing assembly is disposed in the lower valve seat (23). The upper sealing assembly and the lower sealing assembly are used to seal the material in the valve body (10) to prevent leakage and to define the axis of the valve shaft (12); A liquid inlet hole (226) and a liquid discharge hole (227) are provided through the side wall of the heat exchange seat (22). The liquid inlet hole (226) and the liquid discharge hole (227) are used to circulate and supply cooling heat transfer oil to the heat exchange seat (22).

2. The electric high-temperature gas butterfly valve according to claim 1 is characterized in that: The drain hole (227) is connected to a temperature sensor for monitoring the working condition of the butterfly valve.

3. The electric high-temperature gas butterfly valve according to claim 1 is characterized in that: Reinforcing ribs are provided between the side wall of the upper valve seat (21) and the outer wall of the valve body (10).

4. The electric high-temperature gas butterfly valve according to claim 1 is characterized in that: The upper sealing assembly comprises: The sealing sleeve is arranged on an upper moving ring (210) on the upper part of the valve shaft (12), and a cone ring (211) is protruding from the upper end of the upper moving ring (210); An upper baffle (223) and a lower baffle (220) are respectively arranged at the upper and lower parts of the heat exchange seat (22); an annular conical groove (221) is arranged at the lower end of the lower baffle (220); the conical groove (221) is sealingly connected to the conical ring (211); an oil seal ring (224) sealingly connected to the valve shaft (12) is arranged at the center of the upper end of the upper baffle (223); an oil seal gland (225) abutting against the oil seal ring (224) is fixedly arranged on the upper baffle (223).

5. The electric high-temperature gas butterfly valve according to claim 4 is characterized in that: Annular grooves are provided on the contact surfaces of the upper valve seat (21) and the heat exchange seat (22) to improve the sealing performance.

6. The electric high-temperature gas butterfly valve according to claim 4, characterized in that: The cone rings (211) are provided in two groups, and the taper of the upper ones is smaller than the taper of the lower ones.

7. The electric high-temperature gas butterfly valve according to claim 4, characterized in that: The conical groove (221) is provided with a perforation group (222) penetrating the lower partition plate (220).

8. The electric high-temperature gas butterfly valve according to claim 4, characterized in that: A connecting spline (228) is coaxially arranged on the upper end of the valve shaft (12), and the connecting spline (228) is drivingly connected to the electric actuator (3).

9. The electric high-temperature gas butterfly valve according to claim 4, characterized in that: The lower sealing assembly comprises: The sealing sleeve is arranged on a conical lower movable ring (230) at the lower part of the valve shaft (12); the lower movable ring (230) is accommodated in the lower valve seat (23); and a thrust assembly (231) abutting against the lower movable ring (230) is threadedly arranged on the lower end of the valve shaft (12); The lower end of the lower valve seat (23) is sealed with a lower sealing cover (232), and the upper end of the lower sealing cover (232) is protrudingly provided with a cone sleeve (233), and the cone sleeve (233) is sealingly connected to the cone wall of the lower moving ring (230).

10. The electric high-temperature gas butterfly valve according to claim 4, characterized in that: An annular groove is provided on the contact surface of the lower valve seat (23) and the lower sealing cover (232) to improve the sealing performance.

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