Gate valve suitable for low-temperature environment
Through the glass fiber reinforced plastic shell and intelligent heating system in the antifreeze component, the problem of gate valve icing in low-temperature environment is solved, ensuring that the gate valve works normally in low-temperature environments and avoiding safety accidents.
Patent Information
- Application Number
- CN202510650435.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-20
- Publication Date
- 2025-08-19
AI Technical Summary
The liquid freezes in a low temperature environment, causing volume expansion, squeezing internal parts, affecting normal work, and even causing safety accidents.
Antifreeze components are adopted, including glass fiber reinforced plastic shell, temperature sensor, controller, heating wire group, silicone rubber casing, aluminum foil reflective film, nano-aerogel and graphene modified silicone, and the valve body temperature is maintained within the set range through temperature monitoring and intelligent heating.
Effectively prevent the gate valve from freezing, reduce heat loss, ensure that the gate valve works normally in a low-temperature environment, and avoid safety accidents.
Smart Images
Figure CN120506532A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of gate valves, and in particular to a gate valve suitable for low-temperature environments. Background Art
[0002] A gate valve is a valve that opens and closes by moving the opening and closing member (gate) vertically in the direction of medium flow (i.e., the channel axis). The working principle of the gate valve is based on the lifting and lowering movement of the gate. When the gate descends, it presses tightly against the valve seat, thereby cutting off the fluid. When the gate rises, it leaves the valve seat, allowing the fluid to pass.
[0003] Existing devices have some disadvantages during use. For example, when the ambient temperature drops below freezing, the liquid in the gate valve will begin to freeze. When the liquid in the gate valve freezes, the volume expansion of the ice will squeeze the internal parts of the gate valve, causing the gate valve to malfunction, thereby affecting the normal operation of the pipeline system, which will cause the process to be interrupted and even cause safety accidents. Summary of the Invention
[0004] The purpose of the present invention is to provide a gate valve suitable for low-temperature environments, which solves the problem that when the ambient temperature drops below the freezing point, the liquid in the gate valve will freeze, and the volume expansion of the ice will squeeze the parts inside the gate valve, causing the function of the gate valve to be damaged and unable to work normally.
[0005] The present invention provides the following technical solution: A gate valve suitable for low-temperature environments includes a valve body, a gate, a valve stem, a valve cover and a gland, wherein a first lower flange is fixedly sleeved on the outer side of the upper end surface of the valve body, a plurality of first lower mounting holes are opened in an annular array on the first lower flange, a first upper flange is fixedly sleeved on the outer side of the lower end surface of the valve cover, a plurality of first upper mounting holes are opened in an annular array on the first upper flange, a first bolt is provided on the inner side of the same group of the first upper mounting holes and the first lower mounting holes, a first nut is threadedly sleeved on the outer side of the plurality of first bolts, the first lower flange and the first upper flange are connected by the first bolt and the first nut, a second upper flange is fixedly sleeved on the outer side of the upper end surface of the valve cover, a plurality of second upper mounting holes are opened in an annular array on the second upper flange, a second lower flange is fixedly sleeved on the outer side of the lower end surface of the gland, a plurality of second lower mounting holes are opened in an annular array on the second lower flange, a second bolt is provided on the inner side of the same group of the second upper mounting holes and the second lower mounting holes, a second nut is threadedly sleeved on the outer side of the plurality of second bolts, and antifreeze components are provided on both sides of the valve body.
[0006] As a preferred embodiment of the above technical solution, two guide grooves are vertically opened on the inner wall of the valve body, and the two guide grooves are symmetrically arranged. The outer walls on both sides of the gate plate are fixedly connected with guide blocks adapted to the size of the guide grooves, and the gate plate is slidably connected to the corresponding guide grooves through the two guide blocks.
[0007] As a preferred embodiment of the above technical solution, a T-slot is provided on the upper end face of the gate valve, a T-block adapted to the size of the T-slot is fixedly connected to the lower end face of the valve stem, and the valve stem is slidably connected to the T-slot through the T-block.
[0008] As a preferred embodiment of the above technical solution, a packing is provided on the inner side of the top of the valve cover, a valve stem nut is fixedly sleeved on the inner side of the top of the pressure cover, the top end of the valve stem passes through the packing and the valve stem nut and is slidingly connected to the packing and threadedly connected to the valve stem nut, and a handwheel is fixedly sleeved on the outer side of the valve stem nut.
[0009] As a preferred embodiment of the above technical solution, the antifreeze component includes glass fiber reinforced plastic shells respectively arranged on both sides of the valve body, and the shapes of the two glass fiber reinforced plastic shells are adapted to the valve body. The outer sides of the two glass fiber reinforced plastic shells are fixedly connected to multiple connecting blocks, and multiple connecting blocks are horizontally penetrated with multiple connecting holes. Connecting bolts are provided on the inner sides of the two connecting holes in the same group, and connecting nuts are threadedly sleeved on the outer sides of the multiple connecting bolts.
[0010] As a preferred embodiment of the above technical solution, the antifreeze component includes graphene-modified silicone rubbers fixedly connected to the opposite inner walls of the two valve bodies, and the shapes of the two graphene-modified silicone rubbers are adapted to the valve bodies. Two heating chambers are provided inside the two glass fiber reinforced plastic shells, and heating wire groups are provided on the inner sides of the four heating chambers, and silicone rubber sleeves are provided on the outer sides of the four heating wire groups.
[0011] As a preferred embodiment of the above technical solution, the antifreeze component includes nano aerogels fixedly connected to the inner walls of four heating chambers away from the valve body, a first aluminum foil reflective film is provided on the side of the four nano aerogels close to the valve body, and a second aluminum foil reflective film is provided on the inner walls of the four heating chambers away from the nano aerogels. The first aluminum foil reflective film and the second aluminum foil reflective film in the same group are arranged on both sides of the corresponding heating wire group.
[0012] As a preferred embodiment of the above technical solution, the antifreeze component includes a controller fixedly installed on the outer walls of two opposite sides of the two glass fiber reinforced plastic shells, the side walls at both ends of the two glass fiber reinforced plastic shells are horizontally penetrated by a first through hole, the side walls at both ends of the two graphene modified silicone shells are provided with a second through hole at the position corresponding to the first through hole, a mica block is arranged between the first through hole and the second through hole in the same group, and temperature sensors are fixedly installed at the position corresponding to the mica block on the outer side walls at both ends of the two glass fiber reinforced plastic shells, and the sensing ends of the four temperature sensors respectively correspond to the mica blocks horizontally.
[0013] As a preferred embodiment of the above technical solution, the two temperature sensors are electrically connected to the controller through internal circuits, and the four heating wire groups are electrically connected to the controller through internal circuits.
[0014] As a preferred embodiment of the above technical solution, mounting flanges are fixedly sleeved on the outer sides of both ends of the valve body, and a plurality of third mounting holes are formed in an annular array on the two mounting flanges.
[0015] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the problem of gate valve freezing in low temperature environment is solved through the design of components such as glass fiber reinforced plastic shell, temperature sensor, controller, heating wire group, silicone rubber sleeve, aluminum foil reflective film, nano aerogel and graphene modified silica gel in the antifreeze component. The glass fiber reinforced plastic shell not only provides structural support, but also reduces the heat exchange between the valve body and the external environment due to its good thermal insulation performance, and reduces the temperature drop rate of the medium inside the valve body. The temperature sensor can accurately monitor the temperature at both ends of the valve body and feed back the data to the controller. The controller intelligently adjusts the working state of the heating wire group according to the set temperature threshold, generates heat to maintain the valve body temperature within the set threshold range. In addition, the addition of the first aluminum foil reflective film, the second aluminum foil reflective film and the nano aerogel further improves the utilization efficiency of thermal energy and reduces heat loss, while the graphene modified silica gel enables heat to be transferred to the valve body more quickly. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the overall structure of a gate valve suitable for low-temperature environments; Figure 2 This is a schematic diagram of the overall cross-sectional structure of a gate valve suitable for low-temperature environments; Figure 3 This is a schematic diagram of a first partial structure of a gate valve suitable for low-temperature environments; Figure 4 This is a schematic diagram of a second partial structure of a gate valve suitable for low-temperature environments; Figure 5This is a schematic diagram of a third partial structure of a gate valve suitable for low temperature environments; Figure 6 This is a schematic diagram of the antifreeze component structure of a gate valve suitable for low-temperature environments; Figure 7 This is a schematic diagram of a partial cross-sectional structure of a gate valve suitable for low-temperature environments; Figure 8 This is a schematic diagram of the explosion structure of a gate valve suitable for low-temperature environments; Figure 9 This is a schematic diagram of the module connection structure of a gate valve suitable for low-temperature environments.
[0017] In the figure: 10, valve body; 11, gate; 12, valve cover; 13, gland; 14, first lower flange; 15, first lower mounting hole; 16, first upper flange; 17, first upper mounting hole; 18, first bolt; 19, first nut; 101, second upper flange; 102, second upper mounting hole; 103, second lower flange; 104, second lower mounting hole; 105, second bolt; 106, second nut; 107, valve stem; 20, guide groove; 21, guide block; 30, T-slot; 31, T-block; 40, packing; 41, valve Rod nut; 42. Handwheel; 5. Antifreeze assembly; 501. Glass fiber reinforced plastic housing; 502. Connecting block; 503. Connecting hole; 504. Connecting bolt; 505. Connecting nut; 506. Graphene-modified silica gel; 507. Heating chamber; 508. Heating wire group; 509. Nano aerogel; 510. First aluminum foil reflective film; 511. Second aluminum foil reflective film; 512. Controller; 513. First through hole; 514. Second through hole; 515. Mica block; 516. Temperature sensor; 60. Mounting flange; 61. Third mounting hole. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention. Example
[0019] like Figures 1-9As shown, the present invention provides a technical solution: a gate valve suitable for low temperature environment, including a valve body 10, a gate plate 11, a valve stem 107, a valve cover 12 and a pressure cover 13, the outer side of the upper end surface of the valve body 10 is fixedly sleeved with a first lower flange 14, and a plurality of first lower mounting holes 15 are opened in an annular array on the first lower flange 14, and a first upper flange 16 is fixedly sleeved on the outer side of the lower end surface of the valve cover 12, and a plurality of first upper mounting holes 17 are opened in an annular array on the first upper flange 16. First bolts 18 are provided on the inner sides of the same group of first upper mounting holes 17 and the first lower mounting holes 15, and first nuts 19 are threadedly sleeved on the outer sides of the plurality of first bolts 18. The first lower flange 14 and the first upper flange 16 are connected by the first bolts 18 and the first nuts 19. Then, the outer side of the upper end surface of the valve cover 12 is fixedly sleeved with a second upper flange 101, and a plurality of second upper mounting holes 102 are opened in an annular array on the second upper flange 101. The outer side of the lower end surface of the pressure cover 13 is fixedly sleeved with a second lower flange 103, and a plurality of second lower mounting holes 104 are opened in an annular array on the second lower flange 103. Second bolts 105 are provided on the inner sides of the same group of second upper mounting holes 102 and second lower mounting holes 104, and second nuts 106 are threadedly sleeved on the outer sides of the plurality of second bolts 105. Antifreeze components 5 are provided on both sides of the valve body 10, and two guide grooves 20 are vertically opened on the inner wall of the valve body 10, and the two guide grooves 20 are symmetrically arranged. The outer walls on both sides of the gate 11 are fixedly connected with guide blocks 2 adapted to the size of the guide grooves 20. 1, the gate 11 is slidably connected to the corresponding guide groove 20 through two guide blocks 21, a T-slot 30 is provided on the upper end surface of the gate valve, and a T-block 31 adapted to the size of the T-slot 30 is fixedly connected to the lower end surface of the valve stem 107, and the valve stem 107 is slidably connected to the T-slot through the T-block 31, a packing 40 is provided on the inner side of the top of the valve cover 12, and a valve stem nut 41 is fixedly sleeved on the inner side of the top of the pressure cover 13, and the top of the valve stem 107 passes through the packing 40 and the valve stem nut 41 and is slidably connected to the packing 40 and the valve stem nut 41 is threadedly connected, and a handwheel 42 is fixedly sleeved on the outside of the valve stem nut 41, and the outer sides of the two ends of the valve body 10 are fixedly sleeved with mounting flanges 60, and a plurality of third mounting holes 61 are provided on the two mounting flanges 60 in an annular array. During specific use, The design of the mounting flange 60 and the plurality of third mounting holes 61 allows the gate valve to be easily connected to the pipeline system. The bolt and nut connection between the first lower flange 14 and the first upper flange 16, and between the second upper flange 101 and the second lower flange 103 ensures a tight connection between the valve body 10 and the valve cover 12 and the gland 13. The gate 11 is slidably connected to the guide groove 20 in the valve body 10 through the guide block 21, which improves the stability of the gate 11 movement and reduces the friction between the gate 11 and the inner wall of the valve body 10, thereby extending the service life. At the same time, the sliding connection between the T-block 31 and the T-slot 30 also ensures the stability of the valve stem 107 during the lifting process. The design of the packing 40 allows the valve stem 107 to be slidably connected thereto during the lifting process.Friction and wear are reduced, while replacement and maintenance are facilitated. The fixed connection between the valve stem nut 41 and the handwheel 42 makes operation easier. The gate 11 can be raised and lowered by simply turning the handwheel 42. The antifreeze component 5 provided can effectively prevent the medium in the valve body 10 from freezing in low-temperature environments. When the gate valve needs to be opened or closed, rotating the handwheel 42 drives the valve stem nut 41 to cause the valve stem 107 to rise along the packing 40. The rise of the valve stem 107 causes the gate 11 to rise along the guide groove 20 through the guide block 21. As the gate 11 rises, fluid begins to flow through the gate valve until the flow channel of the gate valve is fully opened. When the gate valve needs to be closed, rotating the handwheel 42 in the opposite direction drives the valve stem nut 41 to cause the valve stem 107 to descend along the packing 40. The descending valve stem 107 causes the gate 11 to descend along the guide groove 20 through the guide block 21 until the flow channel of the gate valve is fully closed.
[0020] As an implementation method in this embodiment, Figure 1 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9As shown, the antifreeze component 5 includes a glass fiber reinforced plastic shell 501 respectively arranged on both sides of the valve body 10, and the two glass fiber reinforced plastic shells 501 are shaped to fit the valve body 10, the outer sides of the two glass fiber reinforced plastic shells 501 are fixedly connected to a plurality of connecting blocks 502, and a plurality of connecting holes 503 are transversely opened on the plurality of connecting blocks 502, and a connecting bolt 504 is provided on the inner side of the two connecting holes 503 of the same group, and a connecting nut 505 is threadedly sleeved on the outer side of the plurality of connecting bolts 504, and the antifreeze component 5 includes a graphene modified silica gel 506 respectively fixedly connected to the opposite inner side walls of the two valve bodies 10, and the two graphene modified silica gels 506 are shaped to fit the valve body 10, and the inside of the two glass fiber reinforced plastic shells 501 Each of the four heating chambers 507 is provided with two heating chambers 507, and a heating wire group 508 is provided inside each of the four heating chambers 507. The outside of each of the four heating wire groups 508 is provided with a silicone rubber sleeve. The antifreeze component 5 includes a nano-aerogel 509 fixedly connected to the inner wall of the four heating chambers 507 away from the valve body 10. A first aluminum foil reflective film 510 is provided on the side of the four nano-aerogels 509 close to the valve body 10. A second aluminum foil reflective film 511 is provided on the inner wall of the four heating chambers 507 away from the nano-aerogels 509. The same group of first aluminum foil reflective films 510 and second aluminum foil reflective films 511 are provided on both sides of the corresponding heating wire group 508. The antifreeze component 5 includes a controller 512 fixedly mounted on the outer walls of the two opposite sides of the two glass fiber reinforced plastic shells 501. , the side walls at both ends of the two glass fiber reinforced plastic shells 501 are horizontally penetrated with a first through hole 513, the side walls at both ends of the two graphene modified silicone rubbers 506 are opened at the positions corresponding to the first through holes 513, a mica block 515 is arranged between the same group of first through holes 513 and second through holes 514, and the outer side walls at both ends of the two glass fiber reinforced plastic shells 501 are fixedly installed at the positions corresponding to the mica blocks 515. The sensing ends of the four temperature sensors 516 are respectively horizontally corresponding to the mica blocks 515. The two temperature sensors 516 are electrically connected to the controller 512 through internal circuits, and the four heating wire groups 508 are electrically connected to the controller 512 through internal circuits. During specific use, Two glass fiber reinforced plastic shells 501 are installed on both sides of the valve body 10 and fixed by connecting blocks 502, connecting bolts 504 and connecting nuts 505. The same group of two temperature sensors 516 are used to monitor the temperature of the outside of the two ends of the valve body 10 respectively. The good thermal insulation and stability of the mica block 515 can effectively reduce the impact of the external environment on the temperature sensor 516, so that the temperature sensor 516 can more accurately monitor the actual temperature of the two ends of the valve body 10. The temperature sensor 516 feeds back data to the controller 512. Through the temperature threshold set by the controller 512, when the temperature is lower than the set threshold, the controller 512 will automatically start the heating wire group 508 for heating. The controller 512 receives the temperature data,The operating state of the heating wire assembly 508 is intelligently adjusted. The heating wire assembly 508 is located within the heating chamber 507 and is electrically insulated and protected by a silicone rubber sleeve. It operates under the control of the controller 512, generating heat to maintain the temperature of the valve body 10 within a set threshold range. The glass fiber reinforced plastic shell 501 not only provides structural support but also, due to its excellent thermal insulation properties, effectively reduces heat exchange between the valve body 10 and the external environment, thereby reducing the temperature drop rate of the medium inside the valve body 10. The first and second aluminum foil reflective films 510 and 511 reflect the heat generated by the heating wire assembly 508 back into the heating chamber 507, thereby improving the utilization efficiency of thermal energy. The nano-aerogel 509, as a highly efficient super-insulating material, further enhances the thermal insulation effect of the heating chamber 507 and reduces heat loss. The high thermal conductivity of the graphene-modified silica gel 506 allows heat to be transferred to the valve body 10 more quickly.
[0021] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.
Claims
1. A gate valve suitable for low temperature environments, comprising a valve body (10), a gate plate (11), a valve stem (107), a valve cover (12) and a gland (13), characterized in that: The outer side of the upper end surface of the valve body (10) is fixedly sleeved with a first lower flange (14), and a plurality of first lower mounting holes (15) are provided in an annular array on the upper side of the first lower flange (14). The outer side of the lower end surface of the valve cover (12) is fixedly sleeved with a first upper flange (16), and a plurality of first upper mounting holes (17) are provided in an annular array on the upper side of the first upper flange (16). First bolts (18) are provided on the inner sides of the first upper mounting holes (17) and the first lower mounting holes (15) of the same group, and first nuts (19) are threadedly sleeved on the outer sides of the plurality of first bolts (18). The first lower flange (14) and the first upper flange (16) are connected by the first bolts (18) and the first nuts (19). (19) is connected, the outer side of the upper end surface of the valve cover (12) is fixedly sleeved with a second upper flange (101), and a plurality of second upper mounting holes (102) are provided in an annular array on the upper side of the second upper flange (101), the outer side of the lower end surface of the pressure cover (13) is fixedly sleeved with a second lower flange (103), and a plurality of second lower mounting holes (104) are provided in an annular array on the upper side of the second lower flange (103), and second bolts (105) are provided on the inner sides of the same group of the second upper mounting holes (102) and the second lower mounting holes (104), and second nuts (106) are threadedly sleeved on the outer sides of the plurality of second bolts (105), and antifreeze components (5) are provided on both sides of the valve body (10).
2. A gate valve suitable for low temperature environment according to claim 1, characterized in that: Two guide grooves (20) are vertically formed on the inner side wall of the valve body (10), and the two guide grooves (20) are symmetrically arranged. The outer walls on both sides of the gate plate (11) are fixedly connected with guide blocks (21) adapted to the size of the guide grooves (20). The gate plate (11) is slidably connected to the corresponding guide grooves (20) through the two guide blocks (21).
3. The gate valve suitable for low temperature environment according to claim 1, characterized in that: The upper end surface of the gate valve is provided with a T-shaped groove (30), the lower end surface of the valve stem (107) is fixedly connected with a T-shaped block (31) adapted to the size of the T-shaped groove (30), and the valve stem (107) is slidably connected to the T-shaped groove through the T-shaped block (31).
4. The gate valve suitable for low temperature environment according to claim 1, characterized in that: A packing (40) is provided on the inner side of the top of the valve cover (12), a valve stem nut (41) is fixedly sleeved on the inner side of the top of the pressure cover (13), a top end of the valve stem (107) passes through the packing (40) and the valve stem nut (41) and is slidably connected to the packing (40) and threadedly connected to the valve stem nut (41), and a hand wheel (42) is fixedly sleeved on the outer side of the valve stem nut (41).
5. The gate valve suitable for low temperature environment according to claim 1, characterized in that: The antifreeze assembly (5) comprises glass fiber reinforced plastic shells (501) respectively arranged on both sides of the valve body (10), and the shapes of the two glass fiber reinforced plastic shells (501) are adapted to the valve body (10), the outer sides of the two glass fiber reinforced plastic shells (501) are fixedly connected to a plurality of connecting blocks (502), the plurality of connecting blocks (502) are each transversely penetrated with a plurality of connecting holes (503), the inner sides of the two connecting holes (503) in the same group are each provided with a connecting bolt (504), and the outer sides of the plurality of connecting bolts (504) are each threadedly sleeved with a connecting nut (505).
6. The gate valve suitable for low temperature environment according to claim 5, characterized in that: The antifreeze assembly (5) includes graphene-modified silica gel (506) respectively fixedly connected to the opposite inner walls of the two valve bodies (10), and the shapes of the two graphene-modified silica gels (506) are adapted to the valve bodies (10). Two heating chambers (507) are provided inside the two glass fiber reinforced plastic shells (501), and heating wire groups (508) are provided inside the four heating chambers (507). Silicone rubber sleeves are provided on the outside of the four heating wire groups (508).
7. The gate valve suitable for low temperature environment according to claim 6, characterized in that: The antifreeze assembly (5) comprises a nano-aerogel (509) fixedly connected to the inner wall of the four heating chambers (507) on a side away from the valve body (10); a first aluminum foil reflective film (510) is provided on the side of the four nano-aerogels (509) close to the valve body (10); a second aluminum foil reflective film (511) is provided on the inner wall of the four heating chambers (507) on a side away from the nano-aerogels (509); and the first aluminum foil reflective film (510) and the second aluminum foil reflective film (511) of the same group are provided on both sides of the corresponding heating wire group (508).
8. The gate valve suitable for low temperature environment according to claim 6, characterized in that: The antifreeze component (5) includes a controller (512) fixedly mounted on the outer walls of two opposite sides of two glass fiber reinforced plastic shells (501), the side walls at both ends of the two glass fiber reinforced plastic shells (501) are both laterally penetrated by a first through hole (513), the side walls at both ends of the two graphene modified silica gels (506) are both provided with a second through hole (514) at a position corresponding to the first through hole (513), a mica block (515) is provided between the first through hole (513) and the second through hole (514) in the same group, and a temperature sensor (516) is fixedly mounted at a position corresponding to the mica block (515) on the outer walls at both ends of the two glass fiber reinforced plastic shells (501), and the sensing ends of the four temperature sensors (516) are each laterally corresponding to the mica block (515).
9. The gate valve suitable for low temperature environment according to claim 8, characterized in that: The two temperature sensors (516) are electrically connected to the controller (512) through internal circuits, and the four heating wire groups (508) are electrically connected to the controller (512) through internal circuits.
10. The gate valve suitable for low temperature environment according to claim 1, characterized in that: Mounting flanges (60) are fixedly sleeved on the outer sides of both ends of the valve body (10), and a plurality of third mounting holes (61) are formed in an annular array on the two mounting flanges (60).