A high temperature gate valve

Abstract

The present invention relates to the field of valve technology, and in particular to a high-temperature gate valve, comprising a valve body, a water inlet pipe is arranged on one side of the valve body, a water outlet pipe is arranged on the other side of the valve body, a valve plate is arranged in the valve body, the valve plate is arranged between the water outlet pipe and the water inlet pipe and is used to control the water inlet and water outlet, a valve cover is also arranged on the valve body, and the valve cover is detachably connected to the valve body; an extension pipe is arranged on the upper part of the valve cover, the extension pipe and the valve cover are arranged integrally, a valve stem is also arranged on the valve cover, the valve stem is fixedly connected to the valve plate after extending into the extension pipe, the valve stem is rotatably connected to the valve cover, and a sealing seat is arranged on the valve cover corresponding to the valve stem, and the sealing seat is used to block the medium. The distance between the regulating end of the valve stem and the valve body is raised, which can reduce the heat conduction to the regulating end of the valve stem by increasing the heat conduction distance, thereby reducing the temperature increase of the valve stem end and affecting the regulation. At the same time, lengthening the main seal can reduce the outflow of high-temperature media, further improve the safety factor, and reduce the situation where the valve opening and closing is affected.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a high-temperature gate valve. Background Art

[0002] High temperature gate valve is a valve used in high temperature working conditions. It is a commonly used control valve in oil refining and chemical plants. It usually needs to have good sealing performance. In order to improve the sealing performance, hard sealing is usually used. Surface treatment of high temperature gate valve is performed to improve the sealing performance of the gate valve.

[0003] The high-temperature gate valve is still adjusted in a rotating manner. Therefore, during the rotation adjustment process, the temperature of the gate valve handle will rise with the high-temperature gate valve. If the high-temperature gate valve is adjusted manually, burns may occur, which may affect the normal opening and closing of the high-temperature gate valve. Summary of the invention

[0004] In order to solve the problem that during the rotation adjustment process under the existing technology, the temperature of the gate valve handle will rise with the high-temperature gate valve, and if the high-temperature gate valve is manually adjusted, burns may easily occur, which may affect the normal opening and closing of the high-temperature gate valve. The present application provides a high-temperature gate valve, and the specific solution is as follows.

[0005] A high-temperature gate valve comprises a valve body, a water inlet pipe is arranged on one side of the valve body, a water outlet pipe is arranged on the other side of the valve body, a valve plate is arranged in the valve body, the valve plate is arranged between the water outlet pipe and the water inlet pipe and is used to control the inflow and outflow of water, a valve cover is also arranged on the valve body, and the valve cover is detachably connected to the valve body;

[0006] An extension tube is arranged on the upper part of the valve cover, and the extension tube is arranged integrally with the valve cover. A valve stem is also arranged on the valve cover, and the valve stem is fixedly connected with the valve plate after extending into the extension tube. The valve stem is rotatably connected with the valve cover, and a sealing seat is arranged on the valve cover corresponding to the valve stem, and the sealing seat is used to seal the medium.

[0007] By adopting the above technical solution, an extension tube is arranged on the valve cover, and the main seal as a whole is raised by the extension tube. The distance between the adjusting end of the valve stem and the valve body is raised, which can reduce the heat conduction to the adjusting end of the valve stem by increasing the heat conduction distance, thereby increasing the temperature of the valve stem end and affecting the regulation. At the same time, lengthening the main seal can reduce the outflow of high-temperature media, further improve the safety factor, and reduce the impact on the opening and closing of the valve.

[0008] Optionally, a heat dissipation ring is provided on the extension tube, the heat dissipation ring is arranged circumferentially around the extension tube, the heat dissipation ring is fixedly connected to the extension tube, and the heat dissipation ring is arranged at equal intervals along the length direction of the extension tube.

[0009] By adopting the above technical solution, a heat dissipation ring is arranged on the heating tube, and the heat dissipation effect is increased by increasing the contact area, so that the temperature of the extension tube can be dissipated, further reducing the situation where the temperature at the valve stem adjustment point is too high, and reducing the situation where the valve is difficult to adjust due to overheating.

[0010] Optionally, a bracket is provided on the end of the extension tube away from the valve cover, the bracket is detachably connected to the extension tube, the valve stem is rotatably connected to the bracket after extending out of the extension tube, and a handwheel is also provided on the extension tube, the handwheel is detachably connected to the valve stem, and the handwheel is rotatably connected to the bracket.

[0011] By adopting the above technical solution, a bracket and a handwheel are provided, and the bracket supports the handwheel, which can further increase the stability of the handwheel when it is turned, and further improve the convenience and stability of adjusting the bracket by the handwheel.

[0012] Optionally, a packing for heat dissipation is provided at one end of the valve stem extending out of the extension tube, the packing sleeve is arranged on the outside of the valve stem, a compression sleeve is provided on the upper side of the packing, the compression sleeve abuts the packing, the valve stem is rotatably connected to the packing and the compression sleeve, a pressure cover is provided on the upper side of the pressure cover, the pressure cover is detachably connected to the bracket, and the pressure cover is used to press the pressure sleeve tightly.

[0013] By adopting the above technical solution, a heat-insulating filler, a compression sleeve and a pressure cover are provided at one end where the valve stem is connected to the handwheel, which can further reduce the situation where heat is conducted to the handwheel and the bracket and affects the rotation of the handwheel.

[0014] Optionally, a gasket is provided at the connection between the valve cover and the valve body, and the gasket is used to seal the valve body.

[0015] By adopting the above technical solution, a gasket is provided at the connection between the valve cover and the valve body, so that the valve body can be sealed, thereby reducing the leakage of the medium from the gap of the valve cover, further improving safety, and reducing the risk of personal injury caused by leakage of high-temperature medium.

[0016] Optionally, a limit rod is further provided on the handwheel, the limit rod is fixedly connected to the handwheel, the limit rod can rotate with the handwheel, and a limit ring is provided on the extension tube, the limit ring is used to abut the limit rod.

[0017] By adopting the above technical solution, a limit rod is provided on the hand wheel, and the hand wheel can interfere with the limit ring during rotation to play a role in positioning and limiting rotation. Therefore, the opening status of the valve can be determined according to the abutment position, which is more convenient for personnel to operate and reduces the situation where it is difficult to distinguish the opening and closing status of the valve and affect the work.

[0018] Optionally, the limiting rods are respectively arranged on both sides of the hand wheel, a limiting protrusion is arranged on the limiting ring towards the limiting rod, the limiting protrusions are also respectively arranged on both sides of the limiting ring, and the limiting rod and the limiting protrusion are cross-arranged.

[0019] By adopting the above technical solution, limit rods are provided on both sides of the handwheel, and corresponding limit protrusions are also provided on the limit ring. The limit protrusions and the limit ring can cooperate with each other to limit the rotation of the handwheel at two extreme positions, just to control the opening and closing of the valve, which can reduce the excessive rotation when opening the valve, and reduce the excessive rotation when closing the valve, thereby further improving the accuracy of opening and closing.

[0020] Optionally, a slope is provided on one side of the limiting rod facing the limiting protrusion, and a corresponding slope is also provided on the limiting protrusion corresponding to the limiting rod, and the slopes are used to abut against each other.

[0021] By adopting the above technical solution, inclined surfaces are set on the limit rod and the limit protrusion. The contact mode of the inclined surfaces makes the contact area between the limit rod and the limit protrusion larger, which can increase the friction force, reduce the interference and damage between the limit rod and the limit protrusion, and improve the service life.

[0022] Optionally, a flow channel is opened in the limit rod, a flow channel is also opened in the limit ring, a connecting port is opened on the top of the limit rod, the connecting port is connected to the flow channel, a flow channel is also opened in the limit protrusion, and the flow channels are connected to each other after the limit rod and the limit protrusion abut against each other.

[0023] By adopting the above technical solution, a flow channel is opened at the limit rod and a flow channel is also opened in the limit ring. When the valve is opened, the flow channels are interconnected. At this time, cooling water can be injected to cool the extension pipe, further reducing the problem of overheating at the valve stem affecting the opening and closing of the valve.

[0024] Optionally, a conical head is also provided on the limiting protrusion, and the conical head is used to extend into the flow channel of the limiting rod. A through groove is opened at the conical head, and the through groove is used to communicate with the flow channels on both sides. A plurality of rubber valves are provided on the inclined surface of the limiting rod corresponding to the flow channels, and the rubber valves abut against each other and can block liquid, and the conical head is used to extend into the rubber valve.

[0025] By adopting the above technical solution, a rubber valve is set. When the limit rod and the limit protrusion cooperate, the rubber valve can block the outflow of cooling water and reduce the leakage of cooling water from the flow channel. When the conical head is inserted into the rubber valve, the flow channels can be connected to each other. After the connection, the flow channel water can enter the limit ring along the flow channel for connection, thereby achieving cooling of the extension tube. At the same time, the rubber valve can also reduce the leakage of cooling water.

[0026] In summary, this application has at least the following beneficial effects:

[0027] 1. The present application solves the problem that in the process of rotation and adjustment under the prior art, the temperature of the gate valve handle will rise with the high-temperature gate valve. If the high-temperature gate valve is adjusted manually, burns and the like may easily occur, which may affect the normal opening and closing of the high-temperature gate valve. The present application sets an extension tube and a heat dissipation ring. The heat dissipation ring can dissipate the temperature at the extension tube, reduce the situation where the temperature is transmitted to the hand wheel and affects the product, reduce the situation where the temperature at the hand wheel is too high and it is difficult to open and close the valve plate, thereby improving the safety factor and reducing the situation where workers are burned.

[0028] 2. The present application also provides a cooling ring capable of dissipating heat on the heating tube, which can further reduce the temperature increase at the valve stem. A flow channel for cooling water is also provided, which can reduce the temperature of the valve stem, further improving the safety factor and reducing the risk of workers being scalded. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a half-section view of the first embodiment.

[0030] Figure 2 It is a half-section view of the first embodiment.

[0031] Figure 3 It is a half-section view of the second embodiment.

[0032] Figure 4 It is a half-section view of the third embodiment.

[0033] Description of reference numerals:

[0034] 1. Valve body; 11. Water outlet pipe; 12. Water inlet pipe; 13. Valve plate; 14. Valve stem;

[0035] 2. Valve cover; 21. Sealing seat; 22. Gasket;

[0036] 3. Extension tube; 31. Heat dissipation ring; 32. Filler; 33. Pressing sleeve; 34. Pressing cover; 35. Limiting ring; 351. Limiting protrusion; 352. Conical head; 353. Through groove;

[0037] 4. Bracket;

[0038] 5. Hand wheel; 51. Limit rod; 511. Inclined surface; 512. Flow channel; 513. Connecting port; 514. Rubber valve. DETAILED DESCRIPTION

[0039] The present application is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0040] Embodiment 1

[0041] A high temperature gate valve, such as Figure 1 and Figure 2 As shown, it includes a valve body 1, a water inlet pipe 12 is arranged on one side of the valve body 1, a water outlet pipe 11 is arranged on the other side of the valve body 1, a valve plate 13 is arranged inside the valve body 1, the valve plate 13 is arranged between the water outlet pipe 11 and the water inlet pipe 12 and is used to control the water inlet and outlet, and a valve cover 2 is also arranged on the valve body 1, and the valve cover 2 is detachably connected to the valve body 1. An extension tube 3 is arranged on the upper part of the valve cover 2, and the extension tube 3 and the valve cover 2 are arranged integrally, and a valve stem 14 is also arranged on the valve cover 2, and the valve stem 14 is fixedly connected to the valve plate 13 after extending into the extension tube 3, and the valve stem 14 is rotatably connected to the valve cover 2, and a sealing seat 21 is arranged on the valve cover 2 corresponding to the valve stem 14, and the sealing seat 21 is used to block the medium, and the sealing seat 21 is fixedly installed between the valve stem 14 and the valve cover 2. During specific implementation, a medium can be introduced into the water inlet pipe 12 , and the valve plate 13 can connect the water inlet pipe 12 with the water outlet pipe 11 during the rotation process, and the valve plate 13 can open and close the valve during the rotation process.

[0042] Figure 1 and Figure 2 As shown, a heat dissipation ring 31 is provided on the extension tube 3, and the heat dissipation ring 31 is arranged circumferentially around the extension tube 3. The heat dissipation ring 31 is fixedly connected to the extension tube 3, and the heat dissipation ring 31 is arranged at equal intervals along the length direction of the extension tube 3. In specific implementation, the heat dissipation ring 31 can be made of ceramic, aluminum alloy or bronze. The heat dissipation ring 31 can increase the contact area of ​​the extension tube 3, thereby improving the heat dissipation effect, and can reduce the situation where the valve stem 14 is heated and the valve stem 14 is overheated, which affects the opening and closing of the valve plate 13.

[0043] like Figure 1 and Figure 2 As shown, a bracket 4 is provided on one end of the extension tube 3 away from the valve cover 2, the bracket 4 is detachably connected to the extension tube 3, the valve stem 14 is rotatably connected to the bracket 4 after extending out of the extension tube 3, and a hand wheel 5 is also provided on the extension tube 3, the hand wheel 5 is detachably connected to the valve stem 14, and the hand wheel 5 is rotatably connected to the bracket 4. In specific implementation, when the hand wheel 5 rotates, the valve stem 14 can be driven to rotate, the valve plate 13 can be adjusted, and thus the valve can be adjusted, and the bracket 4 can support the hand wheel 5.

[0044] like Figure 1 and Figure 2As shown, a packing 32 for heat dissipation is provided at one end of the valve stem 14 extending out of the extension tube 3. The packing 32 is sleeved on the outside of the valve stem 14. A pressing sleeve 33 is provided on the upper side of the packing 32. The pressing sleeve 33 abuts against the packing 32. The valve stem 14 is rotatably connected with the packing 32 and the pressing sleeve 33. A gland 34 is provided on the upper side of the pressing sleeve 33. The gland 34 is detachably connected to the bracket 4 and is used to abut against the gland 33. In specific implementation, the materials of the packing 32 include asbestos cement, cement grid, plastic, glass fiber reinforced plastic, ceramic, etc. The packing 32 can increase the heat dissipation effect. The pressing sleeve 33 and the gland 34 can also use the same material as the packing 32 to increase the heat dissipation effect.

[0045] like Figure 1 and Figure 2 As shown, a gasket 22 is provided at the connection between the valve cover 2 and the valve body 1, and the gasket 22 is used to seal the valve body 1. In specific implementation, the gasket 22 can play a sealing effect, thereby reducing the leakage of the medium from the gap.

[0046] Working principle: An extension tube 3 is arranged on the valve cover 2, and the extension tube 3 can raise the main seal, which can prevent the medium from leaking from the valve cover 2 and the valve body 1, and can also reduce the lifting of the main seal, and can reduce the temperature conduction to the valve stem 14, which causes the temperature of the valve stem 14 to be too high and affect the adjustment, thereby improving the safety factor.

[0047] Embodiment 2

[0048] like Figure 3 As shown, the main difference between the second embodiment and the first embodiment is that a limit rod 51 is further provided on the hand wheel 5, the limit rod 51 is fixedly connected to the hand wheel 5, the limit rod 51 can rotate with the hand wheel 5, and a limit ring 35 is provided on the extension tube 3, and the limit ring 35 is used to abut the limit rod 51. The limit rods 51 are respectively arranged on both sides of the hand wheel 5, and the limit protrusions 351 are arranged on the limit ring 35 toward the limit rod 51. The limit protrusions 351 are also respectively arranged on both sides of the limit ring 35, and the limit rod 51 and the limit protrusions 351 are arranged crosswise.

[0049] like Figure 3 As shown, the limiting rod 51 is provided with an inclined surface 511 on one side facing the limiting protrusion 351, and the limiting protrusion 351 is also provided with a corresponding inclined surface 511 corresponding to the limiting rod 51, and the inclined surfaces 511 are used to abut against each other. In specific implementation, the inclined surface 511 can increase the contact area between the limiting rod 51 and the limiting protrusion 351, and increase the friction after contact.

[0050] like Figure 3As shown, a flow channel 512 is provided in the limiting rod 51, a flow channel 512 is also provided in the limiting ring 35, a connection port 513 is provided at the top of the limiting rod 51, the connection port 513 is communicated with the flow channel 512, and a flow channel 512 is also provided in the limiting protrusion 351. After the limiting rod 51 and the limiting protrusion 351 abut, the flow channels 512 are communicated with each other. In specific implementation, the connection port 513 of the limiting rod 51 on one side is used to introduce cooling water, and the connection port 513 on the other side is used to discharge the cooling liquid to improve the heat dissipation effect. When the hand wheel 5 is turned, only when the hand wheel 5 is turned toward one side, the limiting rods 51 on both sides can communicate the flow channels 512 with the corresponding limiting protrusion 351, and the reverse rotation can only play a limiting role.

[0051] like Figure 3 As shown, a conical head 352 is also provided on the limiting protrusion 351, and the conical head 352 is used to extend into the flow channel 512 of the limiting rod 51. A through groove 353 is opened at the conical head 352, and the through groove 353 is used to communicate with the flow channels 512 on both sides. A plurality of rubber valves 514 are provided on the inclined surface 511 of the limiting rod 51 corresponding to the flow channel 512. The rubber valves 514 abut against each other and can block liquid, and the conical head 352 is used to extend into the rubber valve 514.

[0052] Working principle: The basic working principle is the same as that of embodiment 1, but a limit rod 51 and a limit protrusion 351 that can be connected to each other are provided. The limit rod 51 and the limit protrusion 351 cooperate to form a flow channel 512 for cooling water to flow. When high-temperature media are transmitted, the limit rod 51 and the limit protrusion 351 can allow cooling water to flow into the extension tube 3 to cool it down, and cool it down at the filler 32.

[0053] Embodiment 3

[0054] like Figure 4 As shown, the difference between the third embodiment and the second embodiment is that the conical head 352 in the third embodiment is rotatably connected with the limiting protrusion 351 and a thread is provided on the outer wall of the conical head 352, and a thread is provided on the inner wall of the limiting rod 51 accordingly, and the rubber valve 514 is arranged on the inner side of the thread. In specific implementation, when the limiting rod 51 moves toward the limiting protrusion 351, due to the alignment of the thread, the conical head 352 extends into the limiting rod 51 and rotates along the thread, and is threadedly connected with the limiting rod 51 and extends into the rubber valve 514 after the connection. At this time, it is difficult to remove the conical head 352 by rotating the limiting rod 51 in the reverse direction. The conical head 352 must be rotated to reversely drive the limiting rod 51 to disengage, and the hand wheel 5 can be locked while the flow channel 512 is connected to cool down, which further improves the working stability and reduces the situation where the staff or unrelated personnel accidentally close the valve.

[0055] like Figure 4As shown, a rotation groove is also provided on the limiting protrusion 351, and the rotation groove is spirally arranged around the limiting protrusion 351. A rotation block is provided on the conical head 352 facing the rotation groove, and the rotation block can rotate in the rotation groove. By pushing the rotation block, the conical head 352 can be more conveniently driven to disconnect from the limiting rod 51, thereby improving the convenience during operation.

[0056] Working principle: The basic working principle is the same as that of the second embodiment, but a conical head 352 is provided to lock the position of the limit rod 51. The hand wheel 5 can be turned only by adjusting the conical head 352. When the hand wheel 5 is locked, water is passed for cooling, thereby further improving the stability during operation.

[0057] 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. A high temperature gate valve, comprising a valve body (1), characterized in that: A water inlet pipe (12) is arranged on one side of the valve body (1), and a water outlet pipe (11) is arranged on the other side of the valve body (1). A valve plate (13) is arranged inside the valve body (1), and the valve plate (13) is arranged between the water outlet pipe (11) and the water inlet pipe (12) and is used to control the inflow and outflow of water. A valve cover (2) is also arranged on the valve body (1), and the valve cover (2) is detachably connected to the valve body (1); An extension tube (3) is provided on the upper part of the valve cover (2), and the extension tube (3) and the valve cover (2) are integrally arranged. A valve stem (14) is also provided on the valve cover (2), and the valve stem (14) is fixedly connected to the valve plate (13) after extending into the extension tube (3), and the valve stem (14) is rotatably connected to the valve cover (2). A sealing seat (21) is provided on the valve cover (2) corresponding to the valve stem (14), and the sealing seat (21) is used to seal the medium; The extension tube (3) is provided with a heat dissipation ring (31), the heat dissipation ring (31) is arranged circumferentially around the extension tube (3), the heat dissipation ring (31) is fixedly connected to the extension tube (3), and the heat dissipation ring (31) is arranged at equal intervals along the length direction of the extension tube (3); A bracket (4) is provided on one end of the extension tube (3) away from the valve cover (2), the bracket (4) is detachably connected to the extension tube (3), the valve stem (14) is rotatably connected to the bracket (4) after extending out of the extension tube (3), and a hand wheel (5) is also provided on the extension tube (3), the hand wheel (5) is detachably connected to the valve stem (14), and the hand wheel (5) is rotatably connected to the bracket (4); The hand wheel (5) is also provided with a limit rod (51), the limit rod (51) is fixedly connected to the hand wheel (5), the limit rod (51) can rotate along with the hand wheel (5), and the extension tube (3) is provided with a limit ring (35), the limit ring (35) is used to abut against the limit rod (51); The limiting rods (51) are respectively arranged on both sides of the hand wheel (5); a limiting protrusion (351) is arranged on the limiting ring (35) towards the limiting rod (51); the limiting protrusion (351) is also respectively arranged on both sides of the limiting ring (35); the limiting rod (51) and the limiting protrusion (351) are arranged crosswise; The limiting rod (51) is provided with an inclined surface (511) on one side facing the limiting protrusion (351), and the limiting protrusion (351) is also provided with a corresponding inclined surface (511) corresponding to the limiting rod (51), and the inclined surfaces (511) are used to abut against each other; A flow channel (512) is provided in the limiting rod (51), a flow channel (512) is also provided in the limiting ring (35), a connecting port (513) is provided at the top of the limiting rod (51), the connecting port (513) is communicated with the flow channel (512), a flow channel (512) is also provided in the limiting protrusion (351), and the flow channels (512) are communicated with each other after the limiting rod (51) and the limiting protrusion (351) are in contact with each other; The limiting protrusion (351) is also provided with a conical head (352), and the conical head (352) is used to extend into the flow channel (512) of the limiting rod (51). A through groove (353) is provided at the conical head (352), and the through groove (353) is used to communicate with the flow channels (512) on both sides. A plurality of rubber valves (514) are provided on the inclined surface (511) of the limiting rod (51) corresponding to the flow channels (512), and the rubber valves (514) are in contact with each other and can block liquid, and the conical head (352) is used to extend into the rubber valve (514); The conical head (352) is rotatably connected to the limiting protrusion (351) and a thread is provided on the outer wall of the conical head (352). A thread is correspondingly provided on the inner wall of the limiting rod (51). The rubber valve (514) is arranged on the inner side of the thread. When the limiting rod (51) moves toward the limiting protrusion (351), due to the alignment of the threads, the conical head (352) extends into the limiting rod (51) and rotates along the thread to be threadedly connected with the limiting rod (51) and then extends into the rubber valve (514) after the connection. At this time, it is difficult to remove the conical head (352) by rotating the limiting rod (51) in the reverse direction. The conical head (352) must be rotated in the reverse direction to drive the limiting rod (51) to be disconnected.

2. A high temperature gate valve according to claim 1, characterized in that: A packing (32) for heat dissipation is arranged at one end of the valve stem (14) extending out of the extension tube (3); the packing (32) is sleeved on the outside of the valve stem (14); a pressing sleeve (33) is arranged on the upper side of the packing (32); the pressing sleeve (33) abuts against the packing (32); the valve stem (14) and the packing (32) and the pressing sleeve (33) are all rotatably connected; a pressure cover (34) is arranged on the upper side of the pressing sleeve (33); the pressure cover (34) is detachably connected to the bracket (4); and the pressure cover (34) is used to press against the pressure sleeve (33).

3. A high temperature gate valve according to claim 1, characterized in that: A gasket (22) is provided at the connection between the valve cover (2) and the valve body (1), and the gasket (22) is used to seal the valve body (1).

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