Carbonization chamber pressure regulating valve and pressure regulating system

Abstract

The utility model belongs to the technical field of coal coking equipment, and particularly relates to a carbonization chamber pressure regulating valve and a pressure regulating system.The carbonization chamber pressure regulating valve comprises a valve body and an executing mechanism, and the valve body comprises an inner cylinder, an outer cylinder, an upper port and a lower port; the inner cylinder and the outer cylinder are coaxially arranged and fixedly connected together through the upper port, the lower port is fixedly connected with the bottom end of the outer cylinder, the upper port, the outer cylinder and the lower port form a valve body shell, the upper port, the inner cylinder and the lower port form a valve body channel, and the valve body channel is communicated with the valve body shell. And a driving turning plate and a driven turning plate are arranged between the inner barrel and the outer barrel. The pressure regulating valve is favorable for solving the technical problems that the pressure regulating valve in the pressure regulation of the coking chamber of the existing domestic coke oven is relatively high in boundary dimension, is not convenient to install and apply, is not smooth to open and close, is easy to block and burn a driving part, and is low in control precision.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal coking equipment, and in particular relates to a carbonization chamber pressure regulating valve and a pressure regulating system. Background Art

[0002] The pressure of the coke oven carbonization chamber is an important process control parameter in the coking process. If the pressure of the carbonization chamber is too high, a large amount of harmful raw gas will leak out, which will not only pollute the environment and cause energy waste, but also cause a large amount of raw gas to leak into the combustion chamber and damage the coke oven equipment; if the pressure is too low, air will enter the carbonization chamber, causing coke combustion, ash content to increase, and coke quality to decrease. It may even react chemically with the furnace building materials, causing furnace erosion and shortening the furnace life.

[0003] In the prior art, a coke oven carbonization chamber pressure regulating system is usually used to regulate the pressure of the carbonization chamber. The current carbonization chamber pressure regulating systems mainly include the coke oven carbonization chamber pressure monotonic system of the German Wood Company, the coke oven carbonization chamber pressure monotonic system of the French PW Company, and the domestic coke oven bridge pipe flap pressure monotonic system. The former two regulating systems have the problems of complex control and high cost. Although the domestic regulating systems are simple to control, they all have the technical problems of high equipment dimensions that are not conducive to installation and application, valve opening and closing are not smooth, easy to jam and burn the drive components, and low control accuracy. Utility Model Content

[0004] In view of the deficiencies in the prior art described in the above background technology, the utility model provides a carbonization chamber pressure regulating valve and a pressure regulating system to solve the technical problems existing in the existing domestic coke oven carbonization chamber pressure regulation, such as the high external dimensions of the pressure regulating valve being not conducive to installation and application, the valve opening and closing being not smooth, the driving components being easily stuck and burned, and the low control accuracy.

[0005] To achieve the above-mentioned invention object, the utility model discloses the following technical scheme: a carbonization chamber pressure regulating valve is provided, the carbonization chamber pressure regulating valve comprises a valve body and an actuator; the valve body comprises an inner cylinder, an outer cylinder, an upper port, and a lower port, the inner cylinder is coaxially arranged with the outer cylinder and fixedly connected together through the upper port, the lower port is fixedly connected with the bottom end of the outer cylinder, the upper port, the outer cylinder, and the lower port constitute a valve body shell, and the upper port, the inner cylinder and the lower port constitute a valve body channel; an active flap and a driven flap are arranged between the inner cylinder and the outer cylinder, and symmetrically on the cylinder walls of the inner cylinder and the outer cylinder are arranged Two pairs of rotating shafts, the active flap and the driven flap are fixedly connected to their respective corresponding front and rear rotating shafts through a frame body, the lower part of the inner cylinder is an arc-shaped surface, and the shapes of the active flap and the driven flap match the arc-shaped surface of the lower part of the inner cylinder; the rotating shaft connected to the active flap and the rotating shaft connected to the driven flap are meshed and connected through their respective fixed large gears; a crank arm is connected to the outer surface of the active flap, and the actuator includes an electric push rod, the crank arm passes through the outer cylinder and is fixedly connected to the electric push rod, the electric push rod pushes the active flap through the crank arm, and drives the driven flap to rotate between the inner cylinder and the outer cylinder through the active flap, so as to control the size of the valve body channel opening.

[0006] Furthermore, the rotating shaft includes an axle pin and a hexagonal nut connected to the axle pin, the axle pin passes through the walls of the inner cylinder and the outer cylinder respectively, an inner bearing seat is arranged between the axle pin and the wall of the inner cylinder, an outer bearing seat is arranged between the axle pin and the wall of the outer cylinder, the axle pin is installed on the inner bearing seat through a first radial ball bearing, and is installed on the outer bearing seat through a second radial ball bearing.

[0007] Furthermore, the shaft pin is fixedly connected to the frame body through a first flat key, and the frame body is fixedly connected to the active flap or the driven flap.

[0008] Furthermore, an isolation ring sleeve is provided on the shaft pin between the frame body and the first radial ball bearing and on the shaft pin between the frame body and the second radial ball bearing.

[0009] Furthermore, the pin shaft is fixedly connected to the large gear via a second flat key.

[0010] Furthermore, a thrust ball bearing is arranged between the pin shaft and the inner surface of the inner cylinder.

[0011] Furthermore, an adjusting ring sleeve is provided on the pin shaft between the large gear and the second radial ball bearing.

[0012] Preferably, the inner cylinder is an inner cylindrical body, and the outer cylinder is an outer cylindrical body.

[0013] Furthermore, the upper port is fixedly connected with a flange, and the lower port is fixedly connected with a plug interface.

[0014] Furthermore, the actuator also includes an automatic regulator and a pressure transmitter. The automatic regulator is connected to the pressure transmitter, and the automatic regulator is also electrically connected to the electric push rod. The pressure transmitter measures the pressure signal of the carbonization chamber and transmits the measured pressure signal to the automatic regulator. After receiving the pressure signal, the automatic regulator performs negative feedback adjustment, and controls the extension length of the electric push rod, thereby controlling the rotation angle of the active flap and the driven flap, thereby adjusting the size of the valve body channel opening.

[0015] Furthermore, the automatic regulator performs negative feedback regulation after receiving the pressure signal, including: when the pressure value at the pressure measuring point is higher than the set value, the automatic regulator issues an adjustment instruction to open the carbonization chamber pressure regulating valve through the electric push rod; when the pressure value at the pressure measuring point is lower than the set value, the automatic regulator issues an adjustment instruction to close the pressure regulating valve through the electric push rod.

[0016] The utility model also provides a carbonization chamber pressure regulating system, including a gas collecting pipe, a riser, a bridge pipe, and a cut-off valve. The system also includes any one of the carbonization chamber pressure regulating valves described above, wherein the carbonization chamber pressure regulating valve is installed on the upper part of the cut-off valve, specifically, located below the bridge pipe and above the socket of the cut-off valve.

[0017] Furthermore, a pressure measuring point is arranged on the bridge pipe, and the pressure transmitter measures the carbonization chamber pressure signal at the pressure measuring point, and transmits the measured pressure signal to the carbonization chamber pressure regulating valve. The carbonization chamber pressure regulating valve receives the pressure signal and performs automatic adjustment. When the pressure value at the pressure measuring point is higher than the set value, the carbonization chamber pressure regulating valve opens wider; when the pressure value at the pressure measuring point is lower than the set value, the carbonization chamber pressure regulating valve closes narrower.

[0018] The utility model also provides a carbonization chamber pressure regulating method, which can be applied to the carbonization chamber pressure regulating valve and the carbonization chamber pressure regulating system described above, and the method comprises the following steps:

[0019] When the gas collecting pipe is in negative pressure state, a set of carbonization chamber pressure regulating valve is installed for each carbonization chamber;

[0020] When loading coal, the actuator fully opens the pressure regulating valve of the carbonization chamber, and the carbonization chamber is connected with the negative pressure gas collecting pipe to form a negative pressure environment, and the raw coal gas generated in the carbonization chamber is extracted through the gas collecting pipe;

[0021] After the coal loading is completed, the carbonization chamber pressure regulating valve controls the opening of the carbonization chamber pressure regulating valve according to the carbonization chamber pressure signal transmitted by the automatic regulator to automatically adjust the pressure, thereby realizing the bridge pipe pressure control at different coking periods.

[0022] Furthermore, the carbonization chamber pressure regulation method further comprises: during the coke pushing operation, the actuator completely closes the pressure regulating valve to isolate the gas collecting pipe and the carbonization chamber.

[0023] Beneficial Effects

[0024] 1. The utility model has a simple structure and utilizes a double-opening arc-shaped flap valve with an active flap and a driven flap. The arc-shaped flap opens to both sides. Since the flap has a short stroke, the valve height is reduced. Through the structure and position design of the crank arm and the rotating shaft, the power of the actuator is transmitted to the large gear through the crank arm. A pair of externally meshing large gears on the rotating shaft can provide power for the two flaps to rotate in opposite directions at the same time, while ensuring that they have the same rotation angle to ensure that the two flaps move in opposite directions with the same displacement, eliminating the traditional gear box and counterweight structure. The crank arm is connected to the outside of the active flap, and the power arm is long. A smaller driving force can be used to drive the opening and closing of the active flap and the driven flap, which is not prone to jamming and burning of the driving components, and the valve opens and closes smoothly.

[0025] 2. The electric push rod is used as the driving part of the actuator, which has the advantage of high driving precision, thereby improving the accuracy and regulating effect of the carbonization chamber pressure regulation.

[0026] 3. A water seal of a certain height can be formed between the arc-shaped flap and the inner cylinder, which solves the sealing problem between the flap and the inner cylinder, reduces the matching clearance requirements between the flap and the inner cylinder, and reduces the processing accuracy requirements and processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the carbonization chamber pressure regulating valve of the embodiment of the utility model;

[0028] Figure 2 for Figure 1 The front view of the valve body structure of the pressure regulating valve in the middle carbonization chamber;

[0029] Figure 3 for Figure 2 AA section view of the middle valve body;

[0030] Figure 4 for Figure 2 BB section view of the middle valve body;

[0031] Figure 5 for Figure 2 Enlarged view of point A in the middle;

[0032] Figure 6 It is a schematic diagram of the connection relationship between the active flap, the driven flap and the inner cylinder;

[0033] Figure 7This is a schematic diagram of the structure of the carbonization chamber pressure regulating system of the embodiment of the utility model;

[0034] In the figure: 1, valve body, 11, inner cylinder, 12, outer cylinder, 13, upper port, 14, lower port, 15, active flap, 16, driven flap, 17, rotating shaft, 170, shaft pin, 171, hexagonal nut, 172, inner bearing seat, 173, outer bearing seat, 174, first radial ball bearing, 175, second radial ball shaft, 176, first flat key, 177, isolation ring sleeve, 178, second flat key, 179, thrust ball bearing, 18, frame, 19, large gear, 190, adjustment ring sleeve, 20, crank arm, 2, electric push rod, 3, gas collecting pipe, 4, rising pipe, 5, bridge pipe, 6, cut-off valve. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0036] Please inquire Figures 1 to 7, Embodiment 1 of the present utility model provides a carbonization chamber pressure regulating valve. The carbonization chamber pressure regulating valve comprises a valve body 1 and an actuator; the valve body 1 comprises an inner cylinder 11, an outer cylinder 12, an upper port 13, and a lower port 14, the inner cylinder 11 and the outer cylinder 12 are coaxially arranged and fixedly connected together through the upper port 13, the lower port 14 is fixedly connected to the bottom end of the outer cylinder 12, the upper port 13, the outer cylinder 12, and the lower port 14 constitute a valve body shell, and the upper port 13, the inner cylinder 11 and the lower port 14 constitute a valve body channel; an active flap 15 and a driven flap 16 are arranged between the inner cylinder 11 and the outer cylinder 12, and two pairs of rotating shafts 17 are symmetrically arranged on the cylinder walls of the inner cylinder 11 and the outer cylinder 12, the active flap 15 and the driven flap 16 are symmetrically arranged on the cylinder walls of the inner cylinder 11 and the outer cylinder 12, and the active flap 15 and the driven flap 16 are symmetrically arranged on the cylinder walls of the inner cylinder 11 and the outer cylinder 12. 6 are fixedly connected to the corresponding front and rear rotating shafts 17 through the frame 18, the lower part of the inner cylinder 11 is an arc surface, and the shapes of the active flap 15 and the driven flap 16 match the arc surface of the lower part of the inner cylinder 11; the rotating shaft 17 connected to the active flap 15 and the rotating shaft 17 connected to the driven flap 16 are meshed and connected through the large gears 19 fixed to them; a crank arm 20 is connected to the outer surface of the active flap, and the actuator includes an electric push rod 2, the crank arm 20 passes through the outer cylinder 12 and is fixedly connected to the electric push rod 2, the electric push rod 2 pushes the active flap 15 through the crank arm 20, and drives the driven flap 16 to rotate between the inner cylinder 11 and the outer cylinder 12 through the active flap 15, so as to control the size of the valve body channel opening.

[0037] The rotating shaft 17 includes an axle pin 170 and a hexagonal nut 171 connected to the axle pin 170. The axle pin 170 passes through the walls of the inner cylinder 11 and the outer cylinder 12 respectively. An inner bearing seat 172 is arranged between the axle pin 170 and the wall of the inner cylinder 11, and an outer bearing seat 173 is arranged between the axle pin 170 and the wall of the outer cylinder 12. The axle pin 170 is installed on the inner bearing seat 172 through a first radial ball bearing 174, and is installed on the outer bearing seat 173 through a second radial ball bearing 175.

[0038] The shaft pin 170 is fixedly connected to the frame body 18 via a first flat key 176 , and the frame body 18 is fixedly connected to the active flap 15 or the driven flap 16 .

[0039] An isolation ring sleeve 177 is provided on the shaft pin 170 between the frame 18 and the first radial ball bearing 174 and on the shaft pin 170 between the frame 18 and the second radial ball bearing 175. The shaft pin 170 is fixedly connected to the large gear 19 through a second flat key 178. A thrust ball bearing 179 is provided between the shaft pin 170 and the inner surface of the inner cylinder 11. An adjustment ring sleeve 190 is provided on the shaft pin 170 between the large gear 19 and the second radial ball bearing 175.

[0040] In this embodiment 1, the inner cylinder 11 is an inner cylindrical body, and the outer cylinder 12 is an outer cylindrical body. The upper port 13 is fixedly connected with a flange, and the lower port 14 is fixedly connected with a plug port.

[0041] The actuator also includes an automatic regulator and a pressure transmitter (not shown in the figure). The automatic regulator is connected to the pressure transmitter, and the automatic regulator is also electrically connected to the electric push rod 2. The pressure transmitter measures the pressure signal of the carbonization chamber and transmits the measured pressure signal to the automatic regulator. After receiving the pressure signal, the automatic regulator performs negative feedback regulation, and controls the extension length of the electric push rod 2, thereby controlling the rotation angle of the active flap 15 and the driven flap 16, thereby adjusting the size of the valve body channel opening.

[0042] The automatic regulator performs negative feedback regulation after receiving the pressure signal, including: when the pressure value at the pressure measuring point is higher than the set value, the automatic regulator issues an adjustment instruction to open the carbonization chamber pressure regulating valve through the electric push rod; when the pressure value at the pressure measuring point is lower than the set value, the automatic regulator issues an adjustment instruction to close the pressure regulating valve through the electric push rod 2.

[0043] An embodiment of the utility model also provides a carbonization chamber pressure regulating system, including a gas collecting pipe 3, a riser 4, a bridge pipe 5, and a cut-off valve 6. The system also includes any one of the carbonization chamber pressure regulating valves described above, wherein the carbonization chamber pressure regulating valve is installed on the upper part of the cut-off valve 6, specifically, below the bridge pipe 5 and above the socket of the cut-off valve 6.

[0044] A pressure measuring point is arranged on the bridge pipe 5, and the pressure transmitter measures the carbonization chamber pressure signal at the pressure measuring point, and transmits the measured pressure signal to the automatic regulator of the carbonization chamber pressure regulating valve. The carbonization chamber pressure regulating valve receives the pressure signal and performs automatic regulation. When the pressure value at the pressure measuring point is higher than the set value, the carbonization chamber pressure regulating valve opens wider; when the pressure value at the pressure measuring point is lower than the set value, the carbonization chamber pressure regulating valve closes narrower.

[0045] The utility model also provides a carbonization chamber pressure regulating method, which can be applied to the carbonization chamber pressure regulating valve and the carbonization chamber pressure regulating system described above, and the method comprises the following steps:

[0046] When the gas collecting pipe is in negative pressure state, a set of carbonization chamber pressure regulating valve is installed for each carbonization chamber;

[0047] When loading coal, the actuator fully opens the pressure regulating valve of the carbonization chamber, and the carbonization chamber is connected with the negative pressure gas collecting pipe to form a negative pressure environment, and the raw coal gas generated in the carbonization chamber is extracted through the gas collecting pipe;

[0048] After the coal loading is completed, the carbonization chamber pressure regulating valve controls the opening of the carbonization chamber pressure regulating valve according to the carbonization chamber pressure signal transmitted by the automatic regulator to automatically adjust the pressure, thereby realizing the bridge pipe pressure control at different coking periods.

[0049] The carbonization chamber pressure regulation method further comprises: during the coke pushing operation, the actuator completely closes the pressure regulating valve to isolate the gas collecting pipe and the carbonization chamber.

[0050] For matters not described in detail in the carbonization chamber pressure regulating system and pressure regulating method provided in the embodiments of the present application, reference may be made to the carbonization chamber pressure regulating valve device provided in the above embodiments, and will not be repeated here.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, any modifications, improvements and equivalent substitutions made without departing from the principle of the present invention are all included in the protection scope of the present invention.

Claims

1. A carbonization chamber pressure regulating valve, characterized in that: The carbonization chamber pressure regulating valve comprises a valve body and an actuator; the valve body comprises an inner cylinder, an outer cylinder, an upper port, and a lower port, the inner cylinder is coaxially arranged with the outer cylinder and fixedly connected together through the upper port, the lower port is fixedly connected with the bottom end of the outer cylinder, the upper port, the outer cylinder, and the lower port constitute a valve body shell, and the upper port, the inner cylinder and the lower port constitute a valve body channel; an active flap and a driven flap are arranged between the inner cylinder and the outer cylinder, two pairs of rotating shafts are symmetrically arranged on the cylinder walls of the inner cylinder and the outer cylinder, the active flap and the driven flap are fixedly connected to their respective corresponding front and rear rotating shafts through a frame, the lower part of the inner cylinder is an arc surface, and the shapes of the active flap and the driven flap match the arc surface of the lower part of the inner cylinder; The rotating shaft connected to the active flap and the rotating shaft connected to the driven flap are meshed and connected through the large gears fixed to them respectively; a crank arm is connected to the outer surface of the active flap, and the actuator includes an electric push rod, the crank arm passes through the outer cylinder and is fixedly connected to the electric push rod, the electric push rod pushes the active flap through the crank arm, and drives the driven flap to rotate between the inner cylinder and the outer cylinder through the active flap, thereby controlling the size of the valve body channel opening.

2. A carbonization chamber pressure regulating valve according to claim 1, characterized in that: The rotating shaft includes an axle pin and a hexagonal nut connected to the axle pin, the axle pin passes through the walls of the inner cylinder and the outer cylinder respectively, an inner bearing seat is arranged between the axle pin and the wall of the inner cylinder, an outer bearing seat is arranged between the axle pin and the wall of the outer cylinder, the axle pin is installed on the inner bearing seat through a first radial ball bearing, and is installed on the outer bearing seat through a second radial ball bearing; the axle pin is fixedly connected to the frame body through a first flat key, and the frame body is fixedly connected to the active flap or the driven flap.

3. A carbonization chamber pressure regulating valve according to claim 2, characterized in that: Isolation ring sleeves are arranged on the shaft pin between the frame body and the first radial ball bearing and on the shaft pin between the frame body and the second radial ball bearing.

4. A carbonization chamber pressure regulating valve according to claim 2, characterized in that: The pin shaft is fixedly connected to the large gear through a second flat key.

5. The carbonization chamber pressure regulating valve according to claim 2, characterized in that: A thrust ball bearing is arranged between the pin shaft and the inner surface of the inner cylinder.

6. A carbonization chamber pressure regulating valve according to claim 2, characterized in that: An adjusting ring sleeve is arranged on the pin shaft between the large gear and the second radial ball bearing.

7. The carbonization chamber pressure regulating valve according to claim 1, characterized in that: The upper port is fixedly connected with a flange, and the lower port is fixedly connected with a plug interface.

8. The carbonization chamber pressure regulating valve according to claim 1, characterized in that: The inner cylinder is an inner cylindrical body, and the outer cylinder is an outer cylindrical body.

9. The carbonization chamber pressure regulating valve according to claim 1, characterized in that: The actuator also includes an automatic regulator and a pressure transmitter. The automatic regulator is connected to the pressure transmitter, and the automatic regulator is also electrically connected to the electric push rod.

10. A carbonization chamber pressure regulating system, comprising a gas collecting pipe, a riser, a bridge pipe, and a cut-off valve, the system also comprising a carbonization chamber pressure regulating valve as described in any one of claims 1 to 9, wherein the carbonization chamber pressure regulating valve is installed on the upper part of the cut-off valve, specifically located below the bridge pipe and above the socket of the cut-off valve.

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