Fully-sealed gate valve for discharging ash
By using high-temperature resistant materials, combination of multi-conducting pins and spring adjustment devices in the plug-in valve, and detachable sealing device, and cooling the cooling room, the problem of reducing sealing performance and high maintenance costs in the high temperature environment is solved. , achieving long-term safe and reliable operation.
Patent Information
- Application Number
- CN202420971687.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-07
AI Technical Summary
Existing plug-in valves are prone to wear of valve plates, valve seats and sealing gaskets in high temperature environments, resulting in reduced sealing, dust leakage, high maintenance costs and the inability to operate safely and reliably for a long time.
A fully sealed plug-in valve for ash removal is designed, and the valve plate is made of high-temperature and wear-resistant materials. It is connected to the spring adjustment device through multiple guide pins to ensure that the valve plate and the valve seat are closely fitted; it is set outside the valve seat A detachable sealing device and inject cold air into the cooling chamber to cool the sealing device and the drive device.
It effectively improves the sealing effect of the valve, extends the service life of the sealing device and the drive device, reduces maintenance costs, and ensures the long-term safe and reliable operation of the plug-in valve in high temperature environments.
Smart Images
Figure CN222479631U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gate valves, in particular to a fully sealed gate valve for ash unloading. Background Art
[0002] The gate valve is a valve in which the valve plate and the valve seat are always in close contact and sealed. A channel with the same diameter is opened in the valve body. The valve plate is driven by the connecting rod connected to the valve plate to move the valve plate to change or close the size of the valve body channel, thereby realizing the control of the material flow rate. Gate valves are widely used in the fields of electricity, metallurgy, chemical industry, building materials, chemical industry, silos, etc., and have functions such as ash unloading, ventilation, sewage discharge and flow regulation. In practical applications, gate valves are often used as important equipment for dust collector ash hopper unloading, which is used to control the ash discharge of the dust collector ash hopper and prevent dust leakage. At present, the common gate valve for dust collector ash hopper unloading is provided with a baffle, a sealing gasket, a pressure plate and a clamping bolt on the rear side of the valve port. The sealing gasket is compressed by rotating the clamping bolt so that the valve plate is in close contact with the sealing gasket, thereby realizing the sealing of the gate valve.
[0003] At present, the dust collected by the dust collector during use has a small particle size and its temperature is generally 150-230℃. Such a high temperature environment places high demands on the gate valve installed under the ash hopper. The existing gate valve is prone to the following problems during long-term use: (1) During the movement of the valve plate, due to the large friction between the valve plate, the valve seat and the sealing gasket, the valve plate, the valve seat and the sealing gasket will be worn to varying degrees. On the one hand, the gap between the valve plate and the valve seat is increased, and on the other hand, the sealing between the valve plate and the sealing gasket is reduced, causing dust to leak from the sealing surface of the valve, resulting in internal leakage of the valve; (2) After the sealing gasket is worn, the sealing gasket needs to be replaced frequently, which greatly increases the maintenance cost of the gate valve; (3) During the opening of the valve, the dust attached to the valve plate is easily brought into the valve connecting rod area. The deposited dust will cause the valve plate to become stuck when it moves, which will cause the gate valve to fail to work normally; (4) The dust collected in the ash hopper has a small particle size, and the small gap between the connecting rod and the valve seat will cause the dust in the valve cavity to leak out of the valve body, resulting in external leakage of the valve, affecting the on-site environment; (5) The drive device cannot work safely and reliably for a long time in a high temperature environment, which seriously affects the normal use of the gate valve. Utility Model Content
[0004] In order to solve the problems raised in the above background technology, the utility model provides a fully sealed gate valve for ash unloading, which further ensures the sealing effect of the valve and realizes the long-term safe and reliable operation of the gate valve.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fully sealed plug valve for ash unloading, comprising a valve seat, a valve plate, a connecting rod, a spring adjustment device and a supporting wheel; the valve plate is connected to the connecting rod and is reciprocally installed in the valve seat, the spring adjustment device is provided at the bottom of the valve plate, and the supporting wheels are arranged on both sides of the long side of the valve seat for supporting the spring adjustment device; it also includes a cooling chamber and a driving device, and the cooling chamber is arranged between the valve seat and the driving device.
[0006] Preferably, it further comprises a sealing device arranged at the rear side of the valve seat, the sealing device comprising a flange, a housing and a sealing ring, the flange and the housing are detachably connected and axially seal the connecting rod and the valve seat.
[0007] Preferably, air pipe quick connectors are installed on the top and bottom of the cooling chamber respectively.
[0008] Preferably, the valve seat is composed of a frame and a flat key, and the flat key is arranged on the inner periphery of the frame;
[0009] Preferably, the valve plate is composed of a plug plate and a plurality of guide pins, one end of the plug plate is connected to the connecting rod, and the guide pins are arranged on the bottom surface of the plug plate;
[0010] Preferably, the spring adjustment device includes a bracket, a T-nut, a spring, and an adjustment bolt; the bracket is located on the support wheel, and is provided with a through hole corresponding to the guide pin; the T-nut is welded and fixed to the bracket; and the spring is arranged between the guide pin and the T-nut.
[0011] Preferably, the number of the guide pins is an even number and is evenly distributed on the bottom surface of the plug board.
[0012] Preferably, the driving device may be manual, pneumatic or electric.
[0013] Preferably, an upper sealing gasket and an upper sealing plate are provided on one side of the valve seat located above the connecting rod, and the valve seat is fixed to the upper sealing gasket and the upper sealing plate by bolts.
[0014] Preferably, the valve plate is made of high temperature resistant and wear resistant material.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] 1. The utility model cools the sealing device and the connecting rod by injecting cold air into the cooling chamber, which greatly improves the service life of the sealing ring and the driving device, greatly reduces the impact of high temperature on the sealing device and the driving device, and realizes long-term safe and reliable operation of the gate valve.
[0017] 2. By setting a detachable sealing device on the outside of the valve seat, the overall sealing is good, avoiding the valve from leaking out and affecting the environment. This sealing device is easy to disassemble, which greatly facilitates the replacement of sealing materials.
[0018] 3. The valve plate is connected to the spring adjustment device in the form of multiple guide pins. By adjusting the tightness of the spring, the valve plate and the valve seat are always closely fitted, and the gap between the valve plate and the valve seat after wear can be compensated to avoid internal leakage of the valve. Further, the valve plate jamming caused by thermal expansion can be eliminated. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the structure of a fully sealed plug valve for ash unloading in the utility model.
[0020] Figure 2 This is a schematic diagram of the disassembled structure of a fully sealed plug valve for ash unloading according to the utility model.
[0021] Figure 3 for Figure 1 Schematic diagram of valve seat structure
[0022] Figure 4 This is a top view of the structure of a fully sealed plug valve for ash unloading according to the utility model.
[0023] Figure 5 For this utility model Figure 4 Schematic diagram of the cross-sectional structure at AA in the middle
[0024] Figure 6 For this utility model Figure 5 Schematic diagram of the cross-sectional structure at the middle BB
[0025] Figure 7 For this utility model Figure 5 A partial enlarged schematic diagram of point I in the middle
[0026] Figure 8 This is a schematic diagram of the structure of the valve plate and spring adjustment device of the utility model
[0027] Fig. 9 This is a schematic diagram of the disassembled structure of the valve plate and spring adjustment device of the utility model
[0028] In the figure: 1. valve seat; 2. valve plate; 3. spring adjustment device; 4. sealing device; 5. driving device; 6. cooling chamber; 7. connecting rod; 8. supporting wheel; 9. air pipe quick connector; 10. upper sealing plate; 11. upper sealing gasket; 12. sealing gasket; 101. frame; 102. flat key; 201. plug plate; 202. guide pin; 301. bracket; 302. T-nut; 303. adjusting bolt; 304. spring; 401. flange; 402. housing; 403. sealing ring. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] like Figure 1-9 As shown, the utility model provides a fully sealed gate valve for ash unloading, comprising a valve seat 1, a valve plate 2, a spring adjustment device 3, a sealing device 4, a driving device 5, a cooling chamber 6, a connecting rod 7, a supporting wheel 8, a trachea quick connector 9, an upper sealing gasket 11, an upper sealing plate 10, and a sealing gasket 12; the valve seat 1 can be divided into an ash unloading area and a connecting rod area according to the function; the valve seat 1 is composed of a frame 101 and flat keys 102, and flat keys 102 are arranged around the inside of the frame 101, and these flat keys 102 form the sealing surface of the gate valve; support wheels 8 are arranged on both sides of the long sides inside the valve seat 1.
[0031] The valve plate 2 is located in the cavity of the valve seat 1, and its top surface is in contact with the flat key 102; the valve plate 2 is bolted to the connecting rod 7 and can reciprocate in the cavity of the valve seat 1 to control the ash hopper to unload ash. The valve plate 2 is composed of a plug plate 201 and a guide pin 202. The plug plate 201 is made of high temperature resistant and wear-resistant materials, and its rear end is connected to the connecting rod 7; the bottom surface of the plug plate 201 is provided with a plurality of guide pins 202 connected to the spring adjustment device 3. The number of guide pins 202 is reasonably set according to the shape, size and load of the plug plate 201, and the number of guide pins 202 is at least 4.
[0032] The spring adjusting device 3 is arranged between the valve plate 2 and the supporting wheel 8, and the spring adjusting device 3 includes a bracket 301, a T-nut 302, a spring 304, and an adjusting bolt 303; the bracket 301 is located on the supporting wheel 8, and a through hole is opened at the position corresponding to the guide pin 202; the T-nut 302 is welded and fixed to the bracket 301; the spring 304 is arranged between the guide pin 202 of the plug plate 201 and the T-nut 302. With this technical solution, the spring 304 is always in a compressed state. Under the tension of the spring 304, the valve plate 2 is always tightly fitted with the flat key 102, and can compensate for the gap between the valve plate 2 and the valve seat 1 after wear, greatly improving the sealing of the valve, and further eliminating the stuck phenomenon of the valve plate 2 caused by thermal expansion. At the same time, the adjusting bolt 303 can be fine-tuned so that the sealing surface on the valve plate 2 and the valve seat 1 is always in a better fit state, ensuring the sealing of the valve in the full stroke area and avoiding internal leakage of the valve. Under the tension of the spring 304, the valve plate 2 and the flat key 102 fit tightly together, thereby achieving sealing of the valve in the full stroke area and preventing internal leakage of the valve body.
[0033] A sealing device 4 is provided on the rear side of the valve seat 1, and the sealing device 4 can be disassembled and connected to the valve body. The sealing device 4 includes a flange 401, a housing 402 and a sealing ring 403, wherein the housing 402 is welded to the flange 401; the sealing device 4 transforms the connection between the connecting rod 7 and the valve body into a shaft seal, and such a structural design further enhances the overall sealing effect of the gate valve, and prevents the valve from leaking outward and affecting the environment. The sealing device 4 is easy to disassemble, which greatly facilitates the replacement of the sealing material.
[0034] The driving device 5 can be electrically, manually or pneumatically driven, and drives the connecting rod 7 connected to the valve plate 2 to drive the movement of the valve plate 2 to open and close the gate valve.
[0035] The cooling chamber 6 is arranged between the valve seat 1 and the driving device 5, and the top and bottom thereof are respectively installed with air pipe quick connectors 9. During the driving process, the connecting rod 7 and the sealing device 4 are cooled by introducing cold air into the cooling chamber 6, which greatly reduces the influence of high temperature on the sealing device 4 and the driving device 5, greatly improves the service life of the sealing ring 403 and the driving device 5, and greatly reduces the influence of high temperature on the sealing device 4 and the driving device 5, so as to realize the long-term safe and reliable operation of the gate valve.
[0036] Furthermore, an upper sealing gasket 11 and an upper sealing plate 10 are sequentially installed on the connecting rod 7 area of the valve seat 1 to ensure the overall sealing performance of the gate valve.
[0037] Technical effects of the utility model:
[0038] 1. Since the valve body sealing surface is composed of a flat key 102 made of wear-resistant material, the friction between the valve body and the valve plate 2 is reduced. The valve plate 2 is made of wear-resistant material and has better wear resistance.
[0039] 2. The valve plate 2 adopts the form of multiple guide pins 202. The number of guide pins 202 can be reasonably set according to the shape of the valve plate 2, the size of the valve plate 2 and the load, and the applicability is wide.
[0040] 3. By arranging a spring adjustment device 3 at the bottom of the valve plate 2, the valve plate 2 is always closely fitted with the valve seat 1 under the action of elastic force, and can compensate for the gap between the valve plate 2 and the valve seat 1 after wear, and can be fine-tuned, with good sealing performance.
[0041] 4. By arranging a detachable sealing device 4 outside the valve seat 1, the dust leakage phenomenon is further reduced, the overall sealing is good, and the valve is prevented from leaking outwards and affecting the environment. The sealing device 4 is easy to disassemble, which greatly facilitates the replacement of the sealing material.
[0042] 5. The connecting rod 7 area is connected to the feed port. The valve plate 2 and the spring adjustment device 3 will drive the material deposited in the connecting rod 7 area of the valve seat 1 to move during operation, thereby reducing the jamming phenomenon that occurs during the opening and closing of the gate valve.
[0043] 6. The connecting rod 7 and the sealing device 4 are cooled by passing cold air through the cooling chamber 6, which greatly reduces the influence of high temperature on the sealing device 4 and the driving device 5, realizes the long-term safe and reliable operation of the gate valve, and makes the gate valve more widely used.
[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A fully sealed gate valve for ash unloading, characterized in that: It includes a valve seat, a valve plate, a connecting rod, a spring adjusting device and a supporting wheel; the valve plate is connected to the connecting rod and can be reciprocatedly installed in the valve seat, the spring adjusting device is provided at the bottom of the valve plate, and the supporting wheels are arranged on both sides of the long side of the valve seat to support the spring adjusting device; it also includes a cooling chamber and a driving device, and the cooling chamber is arranged between the valve seat and the driving device.
2. A fully sealed gate valve for ash unloading as claimed in claim 1, characterized in that: It also includes a sealing device arranged at the rear side of the valve seat, the sealing device includes a flange, a shell and a sealing ring, the flange and the shell are detachably connected and axially seal the connecting rod and the valve seat.
3. A fully sealed gate valve for ash discharge as claimed in claim 2, characterized in that: Air pipe quick connectors are installed on the top and bottom of the cooling chamber respectively.
4. A fully sealed gate valve for ash unloading as claimed in claim 3, characterized in that: The valve seat is composed of a frame and a flat key, and the flat key is arranged on the inner periphery of the frame.
5. A fully sealed gate valve for ash unloading as claimed in claim 4, characterized in that: The valve plate is composed of a plug plate and a plurality of guide pins, one end of the plug plate is connected to the connecting rod, and the guide pins are arranged on the bottom surface of the plug plate.
6. A fully sealed gate valve for ash unloading as claimed in claim 5, characterized in that: The spring adjustment device includes a bracket, a T-nut, a spring, and an adjustment bolt; the bracket is located on the support wheel and is provided with a through hole at a position corresponding to the guide pin; the T-nut is welded and fixed to the bracket; and the spring is arranged between the guide pin and the T-nut.
7. A fully sealed gate valve for ash unloading as claimed in claim 6, characterized in that: The number of the guide pins is even and evenly distributed on the bottom surface of the plug board.
8. A fully sealed gate valve for ash discharge as claimed in claim 1, characterized in that: The driving device can be manual, pneumatic or electric.
9. A fully sealed gate valve for ash unloading as claimed in claim 1, characterized in that: An upper sealing gasket and an upper sealing plate are arranged on one side of the valve seat located above the connecting rod, and the valve seat is fixed to the upper sealing gasket and the upper sealing plate by bolts.
10. A fully sealed gate valve for ash unloading according to any one of claims 1 to 9, characterized in that: The valve plate is made of high temperature resistant and wear resistant material.