Ceramic gate valve for large diameter high temperature pipelines

Abstract

The present invention relates to a ceramic gate valve for large-caliber high-temperature pipelines. The valve valve comprises a valve body, a valve plate placed in the valve body, and a driving mechanism arranged on the valve body for driving the valve plate to open and close. The valve plate comprises a ceramic pipe fitting, a metal pipe column, a metal cross bar, a valve plate screw, a metal ferrule, and a metal bayonet; the two ends of the metal cross bar are respectively connected with metal pipe columns, thereby forming the main structure of the valve plate, a plurality of ceramic pipe fittings are arranged between the two metal pipe columns from top to bottom, the metal ferrule is sleeved on the end of the ceramic pipe fitting, a clamping table adapted to the metal ferrule is arranged in the metal pipe column, the end of the ceramic pipe fitting is installed in the metal pipe column through the metal ferrule, the metal bayonet penetrates the metal pipe column, the metal ferrule and the ceramic pipe fitting for positioning, the lower end of the valve plate screw is connected to the metal cross bar, the upper end of the valve plate screw is connected to the driving mechanism, and the valve plate is driven to move up and down in the valve body through the driving device to realize opening and closing. The valve plate of the present invention is light in weight, easy to maintain, high temperature resistant, wear resistant, and has a long service life.

Description

Technical Field

[0001] The invention relates to a gate valve, in particular to a ceramic gate valve specially used for large-diameter high-temperature pipelines. Background Art

[0002] At present, in large-diameter high-temperature pipelines, most valve plates are made of refractory castables cast on metal valve cores. The service life of such valve plates is not ideal. (1) Since the expansion coefficient of metal is much larger than that of castables, the castables are easily cracked or fallen off by the metal valve core at high temperatures. The metal valve core will be exposed to harsh environments and the valve core will quickly oxidize, corrode, and wear away. (2) Due to the inherent performance limitations of castables and the difficulty in ensuring construction quality, the valve plate bends and deforms under high temperatures and external loads, and the valve plate becomes stuck and loses its regulating function. For example, in cement tertiary air ducts, the environment is about 850°C and the dust-laden airflow is about 25m / s. The service life of gate valves is mostly 6-10 months, and the shortest service life is even less than 3 months. Once the valve plate is damaged, it must be directly replaced, resulting in loss of materials, costs, and time. Therefore, the short service life of high-temperature valve plates has become a problem for all related companies. Summary of the invention

[0003] The present invention aims to solve the above problems, thereby providing a ceramic gate valve specially used for large-diameter high-temperature pipelines, which can be used in an ambient temperature of up to 1600°C, is wear-resistant, corrosion-resistant and has a long service life.

[0004] The present invention solves the above-mentioned problem by adopting the following technical solution:

[0005] A ceramic gate valve specially used for large-diameter high-temperature pipelines comprises a valve body, a valve plate placed in the valve body, and a driving mechanism arranged on the valve body for driving the valve plate to open and close. The valve plate comprises a ceramic pipe fitting, a metal pipe column, a metal cross bar, a valve plate screw, a metal ferrule, and a metal bayonet. The two ends of the metal cross bar are respectively connected to metal pipe columns to form the main structure of the valve plate. A number of ceramic pipe fittings are arranged between the two metal pipe columns from top to bottom. The metal ferrule is sleeved on the end of the ceramic pipe fitting. A clamping table adapted to the metal ferrule is arranged in the metal pipe column. The end of the ceramic pipe fitting is installed in the metal pipe column through the metal ferrule. The metal bayonet penetrates the metal pipe column, the metal ferrule and the ceramic pipe fitting for positioning. The lower end of the valve plate screw is connected to the metal cross bar, and the upper end of the valve plate screw is connected to the driving mechanism. The valve plate is driven to move up and down in the valve body to realize opening and closing through the driving device.

[0006] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features:

[0007] ①The main body of the valve plate is made of high temperature resistant ceramic material, which has a wide applicable temperature range and can withstand high temperatures of 1600°C. The valve plate has a firm structure, is resistant to high temperatures, wear and corrosion, is suitable for a variety of materials, and has a long service life.

[0008] ②The main structure of the valve plate adopts a combination of hollow pipe fittings, which can be disassembled and replaced on site to save maintenance costs.

[0009] ③ The weight of the valve plate is reduced. Compared with the refractory castable valve plate, the weight is reduced by 50%, which can reduce the motor power and reduce the counterweight.

[0010] Preferably, a further technical solution of the present invention is:

[0011] The ceramic pipe fittings include a plurality of long ceramic pipe fittings arranged at the upper part of the metal pipe column and a plurality of short ceramic pipe fittings arranged at the lower part of the metal pipe column.

[0012] Fixed pulleys are arranged on both sides of the metal pipe column in the valve body to prevent the friction between the valve plate and the valve body when the valve plate is opened and closed. The resistance can be reduced by the fixed pulley when the valve plate is opened or closed, and the supporting function of the fixed pulley can be utilized to meet the installation requirements of various inclinations.

[0013] A heat-insulating sealing material layer is arranged between the end of the ceramic pipe fitting close to the metal pipe column and the valve body, and a heat-insulating filling material layer is arranged inside the ceramic pipe fitting, so as to reduce the temperature inside the metal pipe column.

[0014] The valve body comprises an upper valve body and a lower valve body, and the upper valve body and the lower valve body are connected as a whole by bolts.

[0015] The housing of the lower valve body is provided with multiple inspection doors to facilitate replacement of damaged parts.

[0016] A dust cleaning hole is provided at the bottom of the shell of the lower valve body to facilitate cleaning of dust accumulated inside the valve body.

[0017] A platform is provided on the shell of the upper valve body to facilitate inspection operations.

[0018] The shell of the upper valve body is provided with a fixed pulley and a counterweight block which cooperate with the wire rope. The upper end of the metal pipe column is connected to the counterweight block through the wire rope. The counterweight block is provided to reduce the gravity when the valve plate is opened and closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram of the AA section structure;

[0021] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle BB section;

[0022] Figure 4 yes Figure 2 Schematic diagram of the CC cross-section structure;

[0023] Figure 5 yes Figure 3 Schematic diagram of the structure of the middle DD section;

[0024] Figure 6 is a schematic structural diagram of a valve plate according to an embodiment of the present invention;

[0025] In the figure: valve plate 1; long ceramic pipe 1-1; short ceramic pipe 1-2; metal pipe column 1-3; metal cross bar 1-4; valve plate screw 1-5; metal sleeve 1-6; metal bayonet 1-7; thermal insulation filling material layer 1-8; clamping platform 1-9; upper valve body 2; lower valve body 3; fixed pulley 4; thermal insulation sealing material layer 5; inspection door 6; cleaning hole 7; drive motor 8; counterweight block 9; platform 10; wire rope 11. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0027] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 A ceramic gate valve for large-diameter high-temperature pipelines includes a valve body, a valve plate 1 placed in the valve body, and a driving motor 8 arranged on the valve body for driving the valve plate to open and close. The valve plate 1 includes ceramic pipe fittings, metal pipe columns 1-3, metal cross bars 1-4, valve plate screws 1-5, metal ferrules 1-6, and metal bayonet pins 1-7; the two ends of the metal cross bars 1-4 are respectively connected to the metal pipe columns 1-3 to form the main structure of the valve plate 1, and a plurality of ceramic pipe fittings are arranged between the two metal pipe columns 1-3 from top to bottom. The metal ferrules 1-4 are connected to the metal pipe columns 1-3 at the ends of the metal cross bars 1-4 to form the main structure of the valve plate 1. The sleeve 1-6 is sleeved on the end of the ceramic pipe fitting, and a clamping table 1-9 adapted to the metal sleeve 1-6 is arranged in the metal pipe column 1-3. The end of the ceramic pipe fitting is installed in the metal pipe column 1-3 through the metal sleeve 1-6. The metal bayonet 1-7 passes through the metal pipe column 1-3, the metal sleeve 1-6 and the ceramic pipe fitting for positioning. The lower end of the valve plate screw 1-5 is connected to the metal cross bar 1-4, and the upper end of the valve plate screw 1-5 is connected to the driving motor 8. The driving motor 8 drives the valve plate 1 to move up and down in the valve body to realize opening and closing.

[0028] The cross-sectional shape of the ceramic pipe fittings can be square, parallelogram, quadrilateral with curvature, polygon, circle, etc. In the present embodiment, the pipe fittings are square. The ceramic pipe fittings include a plurality of long ceramic pipe fittings 1-1 arranged on the upper part of the metal pipe column 1-3 and a plurality of short ceramic pipe fittings 1-2 arranged on the lower part of the metal pipe column 1-3. The long ceramic pipe fittings 1-1 and the short ceramic pipe fittings 1-2 are fixed and limited by metal sleeves 1-6 and metal pins 1-7.

[0029] The valve body is provided with fixed pulleys 4 placed on both sides of the metal pipe columns 1-3 to prevent the valve plate 1 from rubbing against the valve body when opening and closing. The fixed pulley 4 can reduce the resistance when the valve plate 1 is opened or closed, and the supporting function of the fixed pulley 4 can meet the installation requirements of various inclinations.

[0030] A heat-insulating sealing material layer 5 is arranged between the end of the ceramic pipe fitting close to the metal pipe column 1-3 and the valve body, and a heat-insulating filling material layer 1-8 is arranged inside the ceramic pipe fitting, thereby dividing the valve body into a high-temperature zone and a low-temperature zone, so that the metal parts at the end of the ceramic pipe fitting are placed in the low-temperature zone, the temperature in the metal pipe column 1-3 is reduced, and the metal parts avoid the high-temperature and high-wear areas, so that the two materials of metal and ceramic are reasonably utilized, and the purpose of long service life of the valve plate 1 is achieved.

[0031] The valve body comprises an upper valve body 2 and a lower valve body 3, and the upper valve body 2 and the lower valve body 3 are connected as a whole by bolts.

[0032] The housing of the lower valve body 3 is provided with a plurality of inspection doors 6 to facilitate replacement of damaged parts.

[0033] A dust cleaning hole 7 is provided at the bottom of the lower valve body 3 to facilitate cleaning of dust accumulated inside the valve body.

[0034] A platform 10 is provided on the shell of the upper valve body 2 to facilitate inspection operations.

[0035] The shell of the upper valve body 2 is provided with a fixed pulley 4 and a counterweight 9 which cooperate with the wire rope 11. The upper end of the metal pipe column 1-3 is connected to the counterweight 9 through the wire rope 11. The counterweight 9 is provided to reduce the gravity when the valve plate 1 is opened and closed.

[0036] The main body of the valve plate 1 of the present invention is made of high-temperature resistant ceramic material, which has a wide applicable temperature range and can withstand a high temperature of 1600°C. The valve plate 1 has a firm structure, is resistant to high temperature, wear-resistant, and corrosion-resistant, is applicable to a variety of materials, and has a long service life. The main structure of the valve plate 1 adopts a combination of hollow pipe fittings, which can be disassembled and replaced individually on site to save maintenance costs. When the valve plate 1 is opened or closed, the resistance can be reduced by the fixed pulley 4, and the limiting effect of the fixed pulley 4 can be used to reduce the collision and wear between the valve plate 1 and the valve body, avoid the valve plate from swinging, and meet the installation requirements of various inclinations. The weight of the valve plate 1 is reduced, which is 50% lighter than that of the refractory castable valve plate, which can reduce the motor power and reduce the counterweight.

[0037] The above description is only a preferred feasible embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made using the contents of the present invention specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A ceramic gate valve for large-diameter high-temperature pipelines, comprising a valve body, a valve plate disposed in the valve body, and a driving mechanism disposed on the valve body for driving the valve plate to open and close, characterized in that: The valve plate includes a ceramic pipe fitting, a metal pipe column, a metal cross bar, a valve plate screw, a metal ferrule, and a metal bayonet; the two ends of the metal cross bar are respectively connected to the metal pipe columns, thereby forming the main structure of the valve plate, a number of ceramic pipe fittings are arranged between the two metal pipe columns from top to bottom, the metal ferrule is sleeved on the end of the ceramic pipe fitting, a clamping table adapted to the metal ferrule is arranged in the metal pipe column, the end of the ceramic pipe fitting is installed in the metal pipe column through the metal ferrule, the metal bayonet penetrates the metal pipe column, the metal ferrule and the ceramic pipe fitting for positioning, the lower end of the valve plate screw is connected to the metal cross bar, the upper end of the valve plate screw is connected to the driving mechanism, and the valve plate is driven by the driving device to move up and down in the valve body to realize opening and closing; The ceramic pipe fittings include a plurality of long ceramic pipe fittings arranged at the upper part of the metal pipe column and a plurality of short ceramic pipe fittings arranged at the lower part of the metal pipe column; A heat-insulating sealing material layer is arranged between the end of the ceramic pipe fitting close to the metal pipe column and the valve body, and a heat-insulating filling material layer is arranged inside the ceramic pipe fitting.

2. The ceramic gate valve for large-diameter high-temperature pipelines according to claim 1 is characterized by: Fixed pulleys are arranged on both sides of the metal pipe column in the valve body to prevent the valve plate from rubbing against the valve body when opening and closing.

3. The ceramic gate valve for large-diameter high-temperature pipelines according to claim 1 is characterized in that: The valve body comprises an upper valve body and a lower valve body, and the upper valve body and the lower valve body are connected as a whole by bolts.

4. The ceramic gate valve for large-diameter high-temperature pipelines according to claim 3 is characterized by: A plurality of inspection doors are arranged on the shell of the lower valve body.

5. The ceramic gate valve for large-diameter high-temperature pipelines according to claim 3 is characterized by: A dust cleaning hole is arranged at the bottom of the shell of the lower valve body.

6. The ceramic gate valve for large-diameter high-temperature pipelines according to claim 3 is characterized by: A platform is arranged on the shell of the upper valve body.

7. The ceramic gate valve for large-diameter high-temperature pipelines according to claim 3 is characterized by: A fixed pulley and a counterweight block matched with the steel wire rope are arranged on the shell of the upper valve body, and the upper end of the metal pipe column is connected with the counterweight block through the steel wire rope.

Images