An extended butterfly valve

Abstract

The present invention relates to the field of valve technology, and in particular to an extended butterfly valve, comprising a valve body and a valve cover, the valve body and the valve cover are detachably connected, a valve stem is arranged in the valve body, one end of the valve stem is fixedly connected to a butterfly plate, the other end of the valve stem is arranged deep in the valve cover, a hand wheel is rotatably connected to the valve cover, the hand wheel is transmission-connected to the valve stem, the hand wheel can drive the valve stem to rotate, the butterfly plate is transmission-connected to the valve stem, the butterfly plate is fixedly connected to the valve stem, and the butterfly plate can rotate with the valve stem. A through hole is opened on the valve body, the butterfly plate is arranged at the through hole and can block the through hole, a clamping ring is arranged at a position corresponding to the through hole on the valve body, the clamping ring is arranged around the through hole, the clamping ring is connected to the butterfly plate by bolts, a sealing ring is arranged between the clamping ring and the butterfly plate, one side of the sealing ring abuts against the butterfly plate, and the other side of the sealing ring abuts against the clamping ring, and the sealing ring can abut against the valve body. It can increase the sealing effect and reduce the situation of sealing failure under low temperature conditions.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to an elongated butterfly valve. 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 on-off control of low-pressure pipeline media. A butterfly valve refers to a valve in which the closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing.

[0003] Valves 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. They mainly play the role of cutting off and throttling in pipelines. The butterfly valve opening and closing part is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating.

[0004] However, as the requirements for precision and reliability in industrial production continue to increase, traditional butterfly valves still have some shortcomings in certain specific application scenarios. Especially in harsh environments such as low temperatures, traditional butterfly valves are prone to problems such as poor sealing and short service life. Summary of the invention

[0005] In order to solve some shortcomings of butterfly valves in the prior art in certain specific application scenarios, especially in harsh environments such as low temperature, traditional butterfly valves are prone to problems such as poor sealing and short service life. This application provides an extended butterfly valve, and the specific solution is as follows.

[0006] An extended butterfly valve, comprising a valve body and a valve cover, wherein the valve body and the valve cover are detachably connected, a valve stem is arranged in the valve body, one end of the valve stem is fixedly connected to a butterfly plate, and the other end of the valve stem is arranged deep in the valve cover, a hand wheel is rotatably connected to the valve cover, the hand wheel is drivingly connected to the valve stem, the hand wheel can drive the valve stem to rotate, the butterfly plate is drivingly connected to the valve stem, the butterfly plate is fixedly connected to the valve stem, and the butterfly plate can rotate with the valve stem;

[0007] The valve body is provided with a through hole, the butterfly plate is arranged at the through hole and can seal the through hole, a clamping ring is arranged at a position corresponding to the through hole on the valve body, the clamping ring is arranged around the through hole, the clamping ring and the butterfly plate are connected by bolts, a sealing ring is arranged between the clamping ring and the butterfly plate, one side of the sealing ring abuts against the butterfly plate, and the other side of the sealing ring abuts against the clamping ring, and the sealing ring can press against the valve body.

[0008] By adopting the above technical scheme, effective sealing can be achieved to prevent medium leakage. At the same time, the structure is simple and easy to install and maintain. The sealing ring design between the clamping ring and the butterfly plate can maintain good sealing performance under high pressure environment and extend the service life of the valve. In addition, the detachable connection between the clamping ring and the butterfly plate makes maintenance and replacement more convenient, and the sealing ring can be removed and replaced more conveniently, thereby improving the reliability and economy of the equipment.

[0009] Optionally, flanges are provided on both sides of the valve body, the flanges are fixedly connected to the valve body, and the flanges are used to connect pipelines.

[0010] By adopting the above technical solution, flanges are provided on both sides of the valve body of the extended butterfly valve, and the flanges are fixedly connected to the valve body, so that the butterfly valve can be easily and quickly connected and disassembled from the pipeline, improving the efficiency of installation and maintenance. At the same time, the design of the flange increases the sealing between the butterfly valve and the pipeline, reduces the risk of leakage, and ensures the safety and reliability of the system.

[0011] Optionally, a sealing gasket is provided on the valve body, the sealing gasket is fixedly connected to the valve body, the sealing gasket is arranged at a position corresponding to a sealing ring, and the sealing ring can press against the sealing gasket on the valve body.

[0012] By adopting the above technical solution, when the butterfly plate closes the through hole, the sealing ring can press against the sealing gasket on the valve body, thereby effectively preventing medium leakage, ensuring that the butterfly valve maintains reliability under various working conditions, and improving the sealing effect.

[0013] Optionally, an extension section is provided on the valve cover, the extension section is provided at one end of the valve cover close to the valve body, a sealing packing is provided in the extension section, and the sealing packing is provided between the valve stem and the valve cover.

[0014] By adopting the above technical solution and setting an extended section, the path for the cold air in the low-temperature medium to spread to the sealing filler is long, which helps to increase the temperature of the sealing filler, so that the sealing filler is not easily lost due to too low temperature.

[0015] Optionally, a heating sleeve is further provided on the extended section, and the heating sleeve is arranged on the extended section. A heating copper wire is arranged inside the heating sleeve, and the heating copper wire is used to generate heat.

[0016] By adopting the above technical solution, the heating copper wire in the heating sleeve can generate heat in a low temperature environment, thereby effectively preventing the sealing packing between the valve stem and the valve cover from failing due to low temperature, ensuring the normal operation and sealing performance of the butterfly valve. At the same time, the design of the heating sleeve makes the heating more uniform, improving the reliability and service life of the entire device.

[0017] Optionally, a threaded sleeve is further provided on the extension section, the threaded sleeve is threadedly connected to the extension section, the threaded sleeve is fixedly connected to the heating sleeve, and the heating sleeve can move up and down with the threaded sleeve.

[0018] By adopting the above technical solution, a threaded sleeve is arranged on the extension section and is threadedly connected thereto, so that the heating sleeve can move up and down as the threaded sleeve rotates. This design not only facilitates the installation and maintenance of the heating sleeve, but also allows the position of the heating sleeve to be adjusted according to actual needs, thereby ensuring the best heating effect. At the same time, the fixed connection between the heating sleeve and the threaded sleeve ensures the stability and reliability of the structure, avoiding reduced heating efficiency or safety hazards caused by looseness.

[0019] Optionally, the heating sleeve is further provided with a thermal expansion and contraction component, and the heating sleeve is also provided with a contact switch. The thermal expansion and contraction component abuts against the contact switch in normal state, and the heating copper wire stops working when the thermal expansion and contraction component contacts the contact switch.

[0020] By adopting the above technical solution, under normal conditions, the thermal expansion and contraction parts abut against the contact switch to close the circuit. When the temperature drops to a certain level, the thermal expansion and contraction parts deform and separate from the contact switch, and the heating copper wire starts working. Heating is then performed when heating is required, thereby effectively preventing overheating. This design not only improves the safety of the equipment, but also extends the service life of the heating device.

[0021] Optionally, a memory metal block is also provided on the heating sleeve, a winding motor is fixedly provided next to the memory metal block, and a contact switch is also provided on the winding motor. The memory metal block abuts against the contact switch on the winding motor when it is normally in a state, and the winding motor stops working when the contact switch is triggered. A pulling rope is provided on the winding motor, one end of the pulling rope is detachably connected to the memory metal block, and the other end of the pulling rope is fixedly connected to the hand wheel. When the memory metal block is at a low temperature, it can trigger the winding motor to pull the hand wheel to close the butterfly plate.

[0022] By adopting the above technical solution, the memory metal block can automatically curl in a low temperature environment. When the valve function chamber needs to be automatically closed, the memory metal block pulls the pull rope connected to it, thereby driving the hand wheel to rotate, so that the butterfly plate is closed, effectively preventing leakage caused by failure of the seal due to too low temperature and undetected leakage, thereby further improving safety.

[0023] Optionally, a memory metal ring is provided on the upper side of the sealing packing, and the memory metal ring is sleeved on the outer side of the sealing packing. A sealing sleeve is also fixedly provided on the memory metal ring, and when the memory metal ring curls due to cold, the sealing sleeve abuts against the valve stem.

[0024] By adopting the above technical solution, when the seal fails, the temperature at the valve cover will decrease. At this time, the memory metal ring will shrink and tighten the sealing sleeve, thereby achieving a double sealing effect on the valve cover and further reducing liquid leakage.

[0025] Optionally, a ceramic section, a phase change energy storage section, and a copper alloy section are sequentially arranged on the extended section from the top side of the valve cover toward the bottom of the valve cover and are all wrapped in a heating sleeve. A heat conduction channel is opened on the valve stem at the position of the extended section, and the heat conduction channel is spirally arranged around the valve stem.

[0026] By adopting the above technical scheme, low thermal conductivity materials, phase change energy storage materials and high thermal conductivity materials are arranged in sequence on the extended section, and active control of the heat conduction path is achieved while extending the valve cover, which can further improve the thermal conductivity efficiency and the temperature maintenance at the extended section. At the same time, a heat conduction channel is arranged on the valve stem at the extended section, and the heat conduction channel can cooperate with the stepped heat conduction material to form a heat conduction gradient field, which can improve the temperature maintenance effect of the valve stem, thereby further reducing the situation of poor sealing.

[0027] In summary, this application has at least the following beneficial effects:

[0028] The present application solves some shortcomings of butterfly valves under the prior art in certain specific application scenarios. In particular, in harsh environments such as low temperatures, traditional butterfly valves are prone to problems such as poor sealing and short service life. The present application reduces the sealing effect caused by low temperature by setting a clamping ring and a sealing ring, thereby improving the sealing effect. After the sealing ring fails, only the clamping ring needs to be removed to more conveniently replace the sealing ring, further improving the convenience of use.

[0029] The present application also further improves the sealing performance of the valve by providing an extended section and increasing the length of the sealing packing to further reduce the situation where the sealing failure is caused by temperature diffusion.

[0030] The present application also provides multiple functions to detect low temperature and leakage and perform heating and sealing, providing multiple protections, thereby further reducing the possibility of sealing failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a cross-sectional view of the first embodiment.

[0032] Figure 2 It is a front view of the first embodiment.

[0033] Figure 3 yes Figure 1 A is an enlarged view of the middle image.

[0034] Figure 4 It is a cross-sectional view of the second embodiment.

[0035] Figure 5 It is a cross-sectional view of the third embodiment, mainly used to show the interior of the extended section.

[0036] Description of reference numerals:

[0037] 1. Valve body; 11. Sealing gasket;

[0038] 2. Valve cover; 21. Extension section; 211. Sealing packing; 212. Memory metal ring; 213. Sealing sleeve; 22. Heating sleeve; 221. Thermal expansion and contraction parts; 222. Contact switch; 223. Memory metal block; 224. Pull rope; 23. Threaded sleeve; 24. Winding motor; 25. Ceramic section; 26. Phase change energy storage section; 27. Copper alloy section;

[0039] 3. Valve stem; 31. Butterfly plate; 32. Clamping ring; 33. Sealing ring; 34. Flange; 35. Heat conduction channel;

[0040] 4. Handwheel. DETAILED DESCRIPTION

[0041] The present application is further described in detail below through specific embodiments in conjunction with the accompanying drawings. Embodiment 1

[0042] An extended butterfly valve, such as Figure 1 and Figure 2 As shown, it includes a valve body 1 and a valve cover 2, the valve body 1 and the valve cover 2 are detachably connected, a valve stem 3 is arranged in the valve body 1, one end of the valve stem 3 is fixedly connected to a butterfly plate 31, and the other end of the valve stem 3 is arranged deep in the valve cover 2, a hand wheel 4 is rotatably connected to the valve cover 2, the hand wheel 4 is transmission-connected to the valve stem 3, the hand wheel 4 can drive the valve stem 3 to rotate, a butterfly plate 31 is transmission-connected to the valve stem 3, the butterfly plate 31 is fixedly connected to the valve stem 3, the butterfly plate 31 can rotate with the valve stem 3, and flanges 34 are arranged on both sides of the valve body 1, the flanges 34 are fixedly connected to the valve body 1, and the flanges 34 are used to connect pipelines. A through hole is opened on the valve body 1, and the butterfly plate 31 is arranged at the through hole and can block the through hole. In specific implementation, the flange 34 can be connected to the pipeline by bolts so that the valve is set between the two pipelines. The butterfly plate 31 is a circular thin plate and is provided with an axial hole. It cooperates with the protrusion on the valve stem 3 through a keyway to ensure that the two can rotate synchronously. The handwheel 4 and the valve stem 3 cooperate with each other through bevel gears to achieve a transmission connection. The rotation of the handwheel 4 can drive the valve stem 3 to rotate, thereby completing the adjustment of the butterfly plate 31. The butterfly plate 31 closes or opens the through hole by rotation, thereby achieving the opening and closing adjustment of the valve.

[0043] like Figure 1 and Figure 3As shown, a clamping ring 32 is provided at a position corresponding to the through hole on the valve body 1, and the clamping ring 32 is arranged around the through hole. The clamping ring 32 is connected to the butterfly plate 31 by bolts, and a sealing ring 33 is provided between the clamping ring 32 and the butterfly plate 31. One side of the sealing ring 33 abuts against the butterfly plate 31, and the other side of the sealing ring 33 abuts against the clamping ring 32. The sealing ring 33 can be pressed against the valve body 1. In specific implementation, the clamping ring 32 can be pressed against the butterfly plate 31 to completely block the through hole, thereby closing the valve, and the sealing ring 33 can form a relatively tight seal with the butterfly plate 31. When the sealing ring 33 fails, the clamping ring 32 can be disassembled, which is more convenient for disassembling and replacing the sealing ring 33, further improving the convenience of use.

[0044] like Figure 1 and Figure 2 As shown, the valve cover 2 is provided with an extension section 21, which is provided at one end of the valve cover 2 close to the valve body 1, and a sealing packing 211 is provided in the extension section 21, and the sealing packing 211 is provided between the valve stem 3 and the valve cover 2. In specific implementation, the sealing packing 211 refers to a dynamic sealing device that generates a compression force between the packing and the rotating part and the fixed part through pre-tightening or self-tightening of the medium pressure, and the valve cover 2 and the sealing packing 211 can be extended by providing the extension section 21, so that the temperature of the low-temperature medium is more difficult to conduct and affect the sealing packing 211, thereby further improving the sealing effect, and the lengthening of the sealing packing 211 can also further reduce the situation where the sealing packing 211 is affected and the sealing fails.

[0045] Working principle: A clamping ring 32 and a sealing ring 33 are arranged on the butterfly plate 31 of the valve body 1. Through the cooperation between the clamping ring 32 and the butterfly plate 31, the sealing ring 33 is installed more tightly, which reduces the possibility of the sealing ring 33 falling off due to the influence of temperature. At the same time, when the sealing ring 33 fails, it can be directly replaced by removing the clamping ring 32, thereby further improving the efficiency of replacing the sealing ring 33 and improving the convenience during use. Embodiment 2

[0046] like Figure 4 As shown, the main difference between the second embodiment and the first embodiment is that the extension section 21 in the second embodiment is further provided with a heating sleeve 22, which is sleeved on the extension section 21, and a heating copper wire is provided inside the heating sleeve 22, and the heating copper wire is used to generate heat. In specific implementation, the heating sleeve 22 needs to be powered or have a built-in battery, and can heat the extension section 21 when in use, so that the extension section 21 will not be in a low temperature state and cause the seal to fail.

[0047] like Figure 4As shown, the extension section 21 is also provided with a threaded sleeve 23, which is threadedly connected to the extension section 21, and the threaded sleeve 23 is fixedly connected to the heating sleeve 22, and the heating sleeve 22 can move up and down with the threaded sleeve 23. In specific implementation, since the actual positions of the seasoning are different, the heating sleeve 22 can be adjusted according to the position of the filler.

[0048] like Figure 4 As shown, the heating sleeve 22 is also provided with a thermal expansion and contraction member 221, and a contact switch 222. The thermal expansion and contraction member 221 abuts against the contact switch 222 in a normal state, and the heating copper wire stops working when the thermal expansion and contraction contacts the contact switch 222. In specific implementation, in a normal state, the thermal expansion and contraction member 221 abuts against the contact switch 222 to close the circuit. When the temperature drops to a certain level, the thermal expansion and contraction member 221 deforms and separates from the contact switch 222, and the heating copper wire starts working. The heating is performed only when heating is required, thereby effectively preventing the occurrence of overheating.

[0049] like Figure 4 As shown, a memory metal block 223 is also provided on the heating sleeve 22, a winding motor 24 is fixedly provided next to the memory metal block 223, a contact switch 222 is also provided on the winding motor 24, the memory metal block 223 abuts against the contact switch 222 on the winding motor 24 when in a normal state, the winding motor 24 stops working when the contact switch 222 is triggered, a pulling rope 224 is provided on the winding motor 24, one end of the pulling rope 224 is detachably connected to the memory metal block 223, and the other end of the pulling rope 224 is fixedly connected to the hand wheel 4, and the memory metal block 223 can trigger the winding motor 24 to pull the hand wheel 4 to close the butterfly plate 31 when the temperature is low. During specific implementation, when the automatic closing function is needed, the pull rope 224 needs to be reeled into the winding motor 24. The memory metal block 223 can automatically curl in a low temperature environment. When the automatic valve closing function room is needed, the memory metal block 223 starts the winding motor 24 to pull the pull rope 224 connected to it, thereby driving the hand wheel 4 to rotate, so that the butterfly plate 31 is closed, effectively preventing the sealing failure caused by low temperature and leakage without being detected. When reopening, the pull rope 224 needs to be manually rewound.

[0050] Working principle: The basic working principle is the same as that of embodiment 1, but a heating sleeve 22 is added to heat the extension section 21 to reduce the situation where the temperature is too low and affects the sealing. At the same time, a thermal expansion and contraction part 221 is provided to control the temperature to reduce overheating or overcooling. Embodiment 3

[0051] like Figure 5As shown, the main difference between the third embodiment and the first embodiment is that the upper side of the sealing packing 211 of the third embodiment is provided with a memory metal ring 212, the memory metal ring 212 is sleeved on the outer side of the sealing packing 211, and a sealing sleeve 213 is fixedly provided on the memory metal ring 212. When the memory metal ring 212 curls due to cold, the sealing sleeve 213 abuts against the valve stem 3. In specific implementation, when the seal fails, the memory metal ring 212 can instantly reduce the temperature and curl, and the sealing sleeve 213 is reinforced on the valve stem 3 to form a further seal and reduce further leakage.

[0052] like Figure 5 As shown, the extended section 21 is provided with a ceramic section 25, a phase change energy storage section 26, and a copper alloy section 27 in sequence from the top side of the valve cover 2 to the bottom of the valve cover 2, and all of them are wrapped in the heating sleeve 22. The valve stem 3 is provided with a heat conduction channel 35 at the position of the extended section 21, and the heat conduction channel 35 is spirally arranged around the valve stem 3 and arranged along the valve stem 3. In specific implementation, the ceramic section 25 is a low thermal conductivity material, and the copper alloy is a high thermal conductivity material. According to the stepped heat conduction, since the low-temperature medium is introduced into one side of the valve body 1, the temperature of the valve body 1 side is relatively low, so the closer to the valve body 1 side, the better the heat conduction effect, and the better the heat preservation effect of the valve stem 3, and the heat conduction channel 35 is provided in the valve stem 3, and the heat conduction channel 35 can cooperate with multiple stepped sections to form a heat conduction gradient field, thereby further improving the heat conduction effect of the valve stem 3, so that the valve stem 3 can maintain the temperature and thus increase the heat, and reduce the situation where the valve stem 3 fails due to too low temperature.

[0053] Working principle: The basic working principle is the same as that of the first embodiment, but multiple seals are added to provide secondary protection in the event of leakage, further reducing leakage, increasing the heat conduction effect, and further reducing valve stem failure.

[0054] The above are preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An extended butterfly valve, characterized in that: The valve body (1) comprises a valve body (1) and a valve cover (2), wherein the valve body (1) and the valve cover (2) are detachably connected, a valve stem (3) is arranged inside the valve body (1), one end of the valve stem (3) is fixedly connected to a butterfly plate (31), and the other end of the valve stem (3) is arranged deep inside the valve cover (2), a hand wheel (4) is rotatably connected to the valve cover (2), the hand wheel (4) is transmission-connected to the valve stem (3), the hand wheel (4) can drive the valve stem (3) to rotate, the butterfly plate (31) is transmission-connected to the valve stem (3), the butterfly plate (31) is fixedly connected to the valve stem (3), and the butterfly plate (31) can rotate along with the valve stem (3); The valve body (1) is provided with a through hole, the butterfly plate (31) is arranged at the through hole and can block the through hole, a clamping ring (32) is arranged at a position corresponding to the through hole on the valve body (1), the clamping ring (32) is arranged around the through hole, the clamping ring (32) and the butterfly plate (31) are connected by bolts, a sealing ring (33) is arranged between the clamping ring (32) and the butterfly plate (31), one side of the sealing ring (33) abuts against the butterfly plate (31), and the other side of the sealing ring (33) abuts against the clamping ring (32), and the sealing ring (33) can be pressed against the valve body (1); The valve cover (2) is provided with an extended section (21), the extended section (21) is arranged at one end of the valve cover (2) close to the valve body (1), a sealing packing (211) is arranged in the extended section (21), and the sealing packing (211) is arranged between the valve stem (3) and the valve cover (2); The extension section (21) is also provided with a heating sleeve (22), the heating sleeve (22) is sleeved on the extension section (21), a heating copper wire is provided inside the heating sleeve (22), and the heating copper wire is used to generate heat; The extension section (21) is also provided with a threaded sleeve (23), the threaded sleeve (23) is threadedly connected to the extension section (21), the threaded sleeve (23) is fixedly connected to the heating sleeve (22), and the heating sleeve (22) can move up and down along with the threaded sleeve (23); The heating sleeve (22) is also provided with a thermal expansion and contraction component (221), and the heating sleeve (22) is also provided with a contact switch (222). The thermal expansion and contraction component (221) abuts against the contact switch (222) in a normal state, and the heating copper wire stops working when the thermal expansion and contraction component (221) contacts the contact switch (222); The heating sleeve (22) is also provided with a memory metal block (223), a winding motor (24) is fixedly provided next to the memory metal block (223), and a contact switch (222) is also provided on the winding motor (24). The memory metal block (223) abuts against the contact switch (222) on the winding motor (24) in a normal state, and the winding motor (24) stops working when the contact switch (222) is triggered. A pulling rope (224) is provided on the winding motor (24), one end of the pulling rope (224) is detachably connected to the memory metal block (223), and the other end of the pulling rope (224) is fixedly connected to the hand wheel (4). When the memory metal block (223) is at a low temperature, it can trigger the winding motor (24) to pull the hand wheel (4) to close the butterfly plate (31); The extended section (21) is provided with a ceramic section (25), a phase change energy storage section (26), and a copper alloy section (27) in sequence from the top side of the valve cover (2) toward the bottom of the valve cover (2), and all are wrapped by a heating sleeve (22). The valve stem (3) is provided with a heat conduction channel (35) at the position of the extended section (21), and the heat conduction channel (35) is spirally arranged around the valve stem (3).

2. The elongated butterfly valve according to claim 1, characterized in that: A memory metal ring (212) is arranged on the upper side of the sealing filler (211), and the memory metal ring (212) is sleeved on the outer side of the sealing filler (211). A sealing sleeve (213) is also fixedly arranged on the memory metal ring (212), and when the memory metal ring (212) curls due to cold, the sealing sleeve (213) abuts against the valve stem (3).

3. The elongated butterfly valve according to claim 1, characterized in that: Flanges (34) are provided on both sides of the valve body (1); the flanges (34) are fixedly connected to the valve body (1); and the flanges (34) are used to connect pipelines.

4. The elongated butterfly valve according to claim 1, characterized in that: A sealing gasket (11) is provided on the valve body (1), the sealing gasket (11) is fixedly connected to the valve body (1), the sealing gasket (11) is arranged at a position corresponding to the sealing ring (33), and the sealing ring (33) can press against the sealing gasket (11) on the valve body (1).

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