Three-eccentric center butterfly valve suitable for high temperature and high pressure

Abstract

The utility model relates to a three-eccentric center butterfly valve suitable for high temperature and high pressure, which belongs to the technical field of butterfly valves and comprises a valve body, a valve rod is rotatably connected inside the valve body, a butterfly valve is fixed on the outer surface of the valve rod, high-pressure supporting mechanisms are arranged on the top side and the bottom side inside the valve body, and cooling mechanisms are arranged on the right side and inside the valve body. A sealing ring is attached to the outer surface of the butterfly valve, the top side of the valve rod is rotationally connected with a rotating shaft, and a rotating disc is fixed to the left end of the rotating shaft. According to the three-eccentric center butterfly valve suitable for the high temperature and the high pressure, high-pressure supporting mechanisms are arranged on the top side and the bottom side in the valve body, a limiting groove can be used for limiting a limiting block, and therefore limiting of a sealing ring is achieved, the sealing ring is prevented from being excessively separated from the butterfly valve under the action of the high pressure, and a spring can buffer the high pressure; the cooling mechanisms are arranged on the right side and in the valve body, so that the butterfly valve and the valve body can be properly cooled, and the butterfly valve and the valve body are prevented from working at high temperature for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a three-eccentric butterfly valve suitable for high temperature and high pressure. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for the on-off control of low-pressure pipeline media. A butterfly valve refers to a valve with a closing member as a disc, which rotates around the valve axis to achieve opening and closing. The butterfly valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays a cutting and throttling role in the pipeline. The butterfly valve opening and closing member is a disc-shaped butterfly plate, which rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating. The butterfly valve is not only widely used in general industries such as petroleum, gas, chemical industry, and water treatment, but also in the cooling water system of thermal power plants.

[0003] For example, a Chinese patent (CN205780924U) discloses a triple-eccentric butterfly valve, which includes a valve body and a valve stem, the valve stem is rotatably inserted into the valve body, and the triple-eccentric butterfly valve also includes an upper sliding bearing, a lower sliding bearing, an upper energy storage sealing ring, and a lower energy storage sealing ring; the upper sliding bearing and the lower sliding bearing are both sleeved on the outer surface of the valve stem, and the upper sliding bearing and the lower sliding bearing are both located between the valve body and the valve stem; the upper energy storage sealing ring is arranged at the bottom of the upper sliding bearing, and the lower energy storage sealing ring is arranged at the top of the lower sliding bearing. In the triple-eccentric butterfly valve of the utility model, the energy storage sealing ring ensures that particulate matter does not enter the bearing, eliminates the jamming between the valve stem and the bearing, and at the same time ensures that the butterfly plate is easy to open, thereby extending the service life.

[0004] The above scheme also has the following technical deficiencies: the above scheme is not convenient for supporting the sealing ring under high pressure; since the sealing ring of the above scheme has no object to support it during use under high pressure, the seal is easily excessively separated from the butterfly valve under the action of high pressure, thereby failing to achieve the sealing effect. Based on this, a three-eccentric butterfly valve suitable for high temperature and high pressure is proposed. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a three-eccentric butterfly valve suitable for high temperature and high pressure, which has the advantages of being able to support the sealing ring and avoid excessive separation of the sealing ring and the butterfly valve, thus solving the problem of excessive separation of the sealing ring and the butterfly valve under high pressure.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-eccentric butterfly valve suitable for high temperature and high pressure, comprising a valve body, the interior of the valve body is rotatably connected to a valve stem, a butterfly valve is fixed to the exterior of the valve stem, a high-pressure support mechanism is provided on the top and bottom sides of the interior of the valve body, a cooling mechanism is provided on the right side and the interior of the valve body, a sealing ring is attached to the outer surface of the butterfly valve, the top side of the valve stem is rotatably connected to a rotating shaft, and a rotating disk is fixed to the left end of the rotating shaft;

[0007] The high-pressure support mechanism includes two pairs of horizontal plates fixed on the top and bottom sides of the valve body, one side of the horizontal plate is abutted with a sleeve, the sleeve is slidably connected with a movable plate inside, a movable rod is fixed on the side of the movable plate away from the horizontal plate, a support block is fixed on the side of the movable rod away from the movable plate, limiting plates are fixed on the left and right sides of the movable plate, and a spring is abutted on the side of the movable plate away from the movable rod.

[0008] Furthermore, the cooling mechanism includes a water tank fixed on the right side of the valve body, a water outlet pipe is fixed in the top side wall of the water tank, a water pump is fixed at one end of the water outlet pipe, and a water inlet pipe is fixed at the output end of the water pump. The cooling mechanism also includes a return pipe fixed in the bottom side wall of the water tank and a cooling cavity opened inside the valve body, and a plurality of cooling fins are fixed in the right side wall of the water tank.

[0009] Furthermore, mounting grooves are provided in the top side wall and the bottom side wall of the valve body, bearing seats are fixed inside the mounting grooves, and the valve stem rotates in the two bearing seats.

[0010] Furthermore, one side of the transverse plate is fixed to one side of the mounting groove, and one end of the support block away from the moving rod is fixed to one side of the sealing ring.

[0011] Furthermore, the left and right sides of the inner wall of the sleeve are provided with limiting grooves, and the limiting plates slide in the corresponding limiting grooves.

[0012] Furthermore, the side of the water inlet pipe away from the water pump is connected to one side of the cooling chamber, and the side of the return pipe away from the water tank is connected to one side of the cooling chamber.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] The three-eccentric butterfly valve suitable for high temperature and high pressure has a high-pressure supporting mechanism provided on the top and bottom sides of the valve body, and can use the limiting groove to limit the limiting block, thereby limiting the sealing ring to avoid excessive separation of the sealing ring and the butterfly valve under the action of high pressure. The spring can buffer the high pressure, and a cooling mechanism is provided on the right side and inside of the valve body, so that the butterfly valve and the valve body can be properly cooled to avoid the butterfly valve and the valve body working at high temperature for a long time, which is beneficial to extending the service life of the butterfly valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the support block connection structure of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the cooling mechanism of the utility model.

[0019] In the figure: 1 valve body, 2 valve stem, 3 butterfly valve, 400 high pressure support mechanism, 401 horizontal plate, 402 sleeve, 403 moving plate, 404 moving rod, 405 support block, 406 limit plate, 407 spring, 500 cooling mechanism, 501 water tank, 502 water outlet pipe, 503 water pump, 504 water inlet pipe, 505 return pipe, 506 cooling cavity, 507 heat dissipation fin, 6 sealing ring, 7 rotating shaft, 8 turntable. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 In this embodiment, a three-eccentric butterfly valve suitable for high temperature and high pressure includes a valve body 1, a valve stem 2 is rotatably connected inside the valve body 1, mounting grooves are opened in the top side wall and the bottom side wall of the valve body 1, a bearing seat is fixed inside the mounting groove, the valve stem 2 rotates in the two bearing seats, a butterfly valve 3 is fixed on the outer surface of the valve stem 2, a high-pressure support mechanism 400 is provided on the top and bottom sides of the valve body 1, a cooling mechanism 500 is provided on the right side and inside of the valve body 1, a sealing ring 6 is attached to the outer surface of the butterfly valve 3, the top side of the valve stem 2 is rotatably connected to a rotating shaft 7, and a turntable 8 is fixed to the left end of the rotating shaft 7.

[0022] The valve stem 2 in this embodiment is used to drive the butterfly valve 3 to rotate, the butterfly valve 3 is used to seal the valve body 1, the high-pressure support mechanism 400 is used to support the sealing ring 6, and the cooling mechanism 500 is used to cool the butterfly valve 3 and the valve body 1.

[0023] It should be noted that the rotating disk 8 is used to drive the rotating shaft 7 to rotate, and the rotating shaft 7 is used to drive the valve stem 2 and the butterfly valve 3 to rotate.

[0024] See also Figure 1-3 In order to facilitate supporting the sealing ring 6, the high-pressure supporting mechanism 400 in this embodiment includes two pairs of horizontal plates 401 fixed on the top and bottom sides of the valve body 1, one side of the horizontal plate 401 is fixed to one side of the mounting groove, one side of the horizontal plate 401 is abutted with a sleeve 402, and a moving plate 403 is slidably connected inside the sleeve 402, a moving rod 404 is fixed to the side of the moving plate 403 away from the horizontal plate 401, a supporting block 405 is fixed to the side of the moving rod 404 away from the moving plate 403, and one end of the supporting block 405 away from the moving rod 404 is fixed to one side of the sealing ring 6, and limiting plates 406 are fixed to the left and right sides of the moving plate 403, and limiting grooves are provided on the left and right sides of the inner wall of the sleeve 402, and the limiting plates 406 slide in the corresponding limiting grooves, and a spring 407 is abutted against the side of the moving plate 403 away from the moving rod 404.

[0025] The high-pressure support mechanism 400 in this embodiment can support the sealing ring 6 through the support block 405. The movement of the support block 405 can drive the moving rod 404 and the moving plate 403 to move. The moving plate 403 can squeeze the spring 407 to deform it. The limit groove can prevent the sealing ring 6 from being excessively separated from the butterfly valve 3 by abutting against the limit plate 406.

[0026] It should be noted that the deformation recovery of the spring 407 can make the sealing ring 6 and the butterfly valve 3 fit together again, and the limiting plate 406 can limit the movable plate 403 .

[0027] See also Figure 1 and Figure 4 In order to facilitate cooling the valve body 1 and the butterfly valve 3, the cooling mechanism 500 in this embodiment includes a water tank 501 fixed on the right side of the valve body 1, a water outlet pipe 502 is fixed in the top side wall of the water tank 501, a water pump 503 is fixed at one end of the water outlet pipe 502, and a water inlet pipe 504 is fixed at the output end of the water pump 503. The cooling mechanism 500 also includes a return pipe 505 fixed in the bottom side wall of the water tank 501 and a cooling cavity 506 opened in the valve body 1. The side of the water inlet pipe 504 away from the water pump 503 is connected to one side of the cooling cavity 506, and the side of the return pipe 505 away from the water tank 501 is connected to one side of the cooling cavity 506. A plurality of heat dissipation fins 507 are fixed in the right side wall of the water tank 501.

[0028] The cooling mechanism 500 in this embodiment can pump the water in the water tank 501 into the water outlet pipe 502 through the water pump 503. The water outlet pipe 502 and the water inlet pipe 504 are used to introduce the water flow into the cooling chamber 506. The cooling chamber 506 is used to load cold water to cool the valve body 1 and the butterfly valve 3. The heat dissipation fins 507 are used to dissipate heat and cool the water in the water tank 501.

[0029] It should be noted that the return pipe 505 is used to converge the used cold water into the water tank 501 , so as to facilitate the water flow to be reused, and the bottom end of the water pump 503 is fixed to the top side of the water tank 501 .

[0030] The electrical components appearing in the text are all electrically connected to the controller and the power supply. The control method of the utility model is controlled by the controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power supply is also common knowledge in this field. The utility model is mainly used to protect mechanical devices, so the utility model will no longer explain the control method and circuit connection in detail.

[0031] The working principle of the above embodiment is:

[0032] When the valve body 1 is subjected to high pressure, the high pressure causes the sealing ring 6 to move, and the sealing ring 6 drives the support block 405 to move, and the support block 405 drives the moving rod 404 and the moving plate 403 to move, and the moving plate 403 squeezes the spring 407, and the spring 407 deforms to provide a certain support to the sealing ring 6. When the pressure on the sealing ring 6 is too large, the sealing ring 6 drives the moving plate 403 and the limiting plate 406 to move, and when the limiting plate 406 abuts against the side of the limiting groove away from the support block 405, the supporting Block 405 and sealing ring 6 cannot move further, so as to support sealing ring 6. When the valve body 1 is in a high temperature state, water pump 503 is started, and water pump 503 draws cold water in water tank 501 into water outlet pipe 502. Water outlet pipe 502 introduces cold water into water inlet pipe 504. Cold water finally enters cooling chamber 506 to cool valve body 1 and butterfly valve 3. Then water flows back to water tank 501 through return pipe 505, and heat sink fins 507 dissipate heat in water tank 501, so as to realize recycling of cold water.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A triple-eccentric butterfly valve suitable for high temperature and high pressure, comprising a valve body (1), characterized in that: The valve body (1) is rotatably connected to a valve stem (2) inside, a butterfly valve (3) is fixed on the outside of the valve stem (2), a high-pressure support mechanism (400) is provided on the top and bottom sides inside the valve body (1), a cooling mechanism (500) is provided on the right side and inside of the valve body (1), a sealing ring (6) is attached to the outer surface of the butterfly valve (3), the top side of the valve stem (2) is rotatably connected to a rotating shaft (7), and a rotating disk (8) is fixed on the left end of the rotating shaft (7); The high-pressure support mechanism (400) comprises two pairs of transverse plates (401) fixed on the top and bottom sides of the valve body (1), one side of the transverse plate (401) is in contact with a sleeve (402), the interior of the sleeve (402) is slidably connected with a movable plate (403), a movable rod (404) is fixed on the side of the movable plate (403) away from the transverse plate (401), a support block (405) is fixed on the side of the movable rod (404) away from the movable plate (403), limiting plates (406) are fixed on both the left and right sides of the movable plate (403), and a spring (407) is in contact with the side of the movable plate (403) away from the movable rod (404).

2. A triple eccentric butterfly valve suitable for high temperature and high pressure according to claim 1, characterized in that: The cooling mechanism (500) comprises a water tank (501) fixed to the right side of the valve body (1); a water outlet pipe (502) is fixed in the top side wall of the water tank (501); a water pump (503) is fixed at one end of the water outlet pipe (502); a water inlet pipe (504) is fixed at the output end of the water pump (503); the cooling mechanism (500) further comprises a return pipe (505) fixed in the bottom side wall of the water tank (501) and a cooling cavity (506) opened in the valve body (1); and a plurality of heat dissipation fins (507) are fixed in the right side wall of the water tank (501).

3. The triple eccentric butterfly valve suitable for high temperature and high pressure according to claim 1, characterized in that: The top side wall and the bottom side wall of the valve body (1) are provided with mounting grooves, bearing seats are fixed inside the mounting grooves, and the valve stem (2) rotates in the two bearing seats.

4. A triple eccentric butterfly valve suitable for high temperature and high pressure according to claim 3, characterized in that: One side of the transverse plate (401) is fixed to one side of the mounting groove, and one end of the support block (405) away from the moving rod (404) is fixed to one side of the sealing ring (6).

5. The triple-eccentric butterfly valve suitable for high temperature and high pressure according to claim 1, characterized in that: Limiting grooves are provided on both left and right sides of the inner wall of the sleeve (402), and the limiting plates (406) slide in the corresponding limiting grooves.

6. The triple eccentric butterfly valve suitable for high temperature and high pressure according to claim 2, characterized in that: The side of the water inlet pipe (504) away from the water pump (503) is connected to one side of the cooling chamber (506), and the side of the return pipe (505) away from the water tank (501) is connected to one side of the cooling chamber (506).

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