A water preheater

Abstract

The present application provides a feed water preheater, which belongs to the field of preheater technology. The feed water preheater includes a base, a preheater body and a driving member, wherein the driving member drives the preheater body to rotate on the base, the air ports at both ends of the preheater body are connected with a reversing valve, an air pipe is connected between the two reversing valves, and a self-sealing port is provided on the preheater body, and the self-sealing port is connected with the heating pipe in the preheater body. In this application: when the preheater body needs to be cleaned, the hot exhaust gas of the dry quenching furnace is discharged after bypassing the preheater body by using the reversing valve and the air pipe, which does not affect the normal exhaust of the dry quenching furnace, and the cleaning liquid is added to the preheater body through the cleaning port, and the connection with the preheater body is disconnected by using the telescopic joint, and then the driving member drives the preheater body to rotate, so that the cleaning liquid shakes and impacts in the preheater body to produce a flushing effect, which can effectively reduce the cleaning dead corners, and finally the cleaning liquid can be discharged through the cleaning port.

Description

Technical Field

[0001] The present application relates to the technical field of preheaters, and in particular to a feedwater preheater. Background Art

[0002] The feedwater preheater is usually installed at the gas outlet of the dry quenching furnace, and the water is heated by the heat of the gas in the quenching furnace. Long-term use of the feedwater preheater will form thick stains that affect the heat absorption of the feedwater preheater.

[0003] In this regard, China's patent application number CN202222558119.3 discloses an online device for cleaning dust accumulation in a feed water preheater. The solution mainly arranges multiple high-pressure nozzles inside the preheater, and uses water or gas to flush and air-dry the internal side walls of the machine body and the walls of the heating tubes. In this way, the inside of the feed water preheater can be cleaned without disassembly.

[0004] However, in the process of implementing the technical solution in the embodiments of the present application, the inventor of the present application found that the above technology has at least the following technical problems:

[0005] 1. There are many heating tubes in the preheater, and there are many dead corners. It is difficult to clean all positions with a limited number of nozzles, resulting in poor cleaning effect;

[0006] 2. Since the preheater is connected in series at the air outlet of the dry quenching furnace, the dry quenching furnace cannot be exhausted normally when the preheater is cleaned, affecting the operation of the dry quenching furnace. Utility Model Content

[0007] In order to make up for the above deficiencies, the present application provides a feed water preheater, aiming to improve the problems mentioned in the above background technology.

[0008] An embodiment of the present application provides a feed water preheater, comprising a base, a preheater body and a driving member, wherein the driving member drives the preheater body to rotate on the base, the air ports at both ends of the preheater body are connected to reversing valves, an air pipe is connected between the two reversing valves, a self-sealing port is provided on the preheater body, the self-sealing port is connected to a heating pipe in the preheater body, a telescopic joint is provided on the base and is detachably connected to the self-sealing port, and a cleaning port is also provided on the preheater body.

[0009] In a specific implementation manner, the reversing valve is mounted on the base, and a rotary joint is provided on the reversing valve to communicate with the air port of the preheater body.

[0010] In the above implementation process, the interface on the reversing valve is fixed and is connected to the rotating preheater body through a rotary joint.

[0011] In a specific embodiment, the driving member includes a worm wheel, a worm and a motor, the worm wheel is connected to the preheater body shaft, the worm is rotatably connected to the base, the worm is meshed with the worm wheel, and the output end of the motor is connected to the worm shaft.

[0012] In the above implementation process, the motor drives the preheater body to rotate through the meshing of the worm and the worm wheel, and the torque is greater, which facilitates the shaking and impact of the cleaning liquid in the preheater body, thereby improving the cleaning effect.

[0013] In a specific embodiment, the self-sealing port includes a sleeve, a gate is elastically connected to the sleeve, and the gate is movably sealed to the sleeve.

[0014] In the above implementation process, when the preheater body rotates, the spring behind the gate plate presses the gate plate tightly to seal the sleeve mouth, thereby achieving sealing, and the hot water originally in the preheater body continues to remain inside.

[0015] In a specific embodiment, the telescopic joint includes a telescopic tube, the lower end of the telescopic tube is fixedly connected to the base, and the upper end of the telescopic tube is movably plugged into the sleeve.

[0016] In a specific embodiment, the telescopic joint further includes an electric cylinder, which is mounted on the base, and the telescopic end of the electric cylinder is fixedly connected to the telescopic end of the telescopic tube.

[0017] In the above implementation process, the electric cylinder pushes the telescopic tube out to achieve docking with the self-sealing port. When the electric cylinder contracts the telescopic tube, interference between the self-sealing port and the telescopic joint is avoided when the preheater body rotates.

[0018] In a specific implementation manner, a push rod is fixedly connected inside the telescopic end of the telescopic tube, and the push rod is movably pressed against the gate plate.

[0019] In the above implementation process, when the telescopic tube is ejected, the gate plate is pushed open by the ejector rod to achieve the effect of automatic connection.

[0020] In a specific implementation manner, a heat pipe port is provided at the lower end of the telescopic pipe and is connected to an external water supply pipeline.

[0021] In the above implementation process, the hot pipe port is used to connect the water supply pipe. It should be noted that both hot pipe ports are externally connected to solenoid valves. When the expansion joint is disconnected from the self-sealing port, the solenoid valve is closed to prevent the water supply pressure from overflowing from the expansion pipe.

[0022] Compared with the prior art, the beneficial effects of the present application are as follows: when the preheater body needs to be cleaned, the hot exhaust gas of the dry quenching furnace is discharged after bypassing the preheater body by using the reversing valve and the air pipe, which does not affect the normal exhaust of the dry quenching furnace, and the cleaning liquid is added to the preheater body through the cleaning port, and the connection with the preheater body is disconnected by using the expansion joint, and then the driving part drives the preheater body to rotate, so that the cleaning liquid shakes and impacts in the preheater body to produce a flushing effect, which can effectively reduce the cleaning dead corners, and finally the cleaning liquid can be discharged through the cleaning port. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of a feedwater preheater from a first perspective provided in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of a feed water preheater from a second perspective provided in an embodiment of the present application;

[0026] Figure 3 Provided for the implementation of this application Figure 1 A partial enlarged schematic diagram in the middle;

[0027] Figure 4 Provided for the implementation of this application Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0028] Figure 5 A schematic diagram of the connection relationship between the self-sealing and expansion joint provided in an embodiment of the present application.

[0029] In the figure: 10-base; 20-preheater body; 30-driving member; 31-worm gear; 32-worm; 33-motor; 40-reversing valve; 50-air pipe; 60-self-sealing port; 61-casing; 62-gate; 70-expansion joint; 71-expansion tube; 72-electric cylinder; 73-thrust rod; 74-heat pipe port; 80-cleaning port; 90-rotating joint. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0031] See also Figure 1-Figure 5The present application provides a feed water preheater, comprising a base 10, a preheater body 20 and a driving member 30, the driving member 30 drives the preheater body 20 to rotate on the base 10, the air ports at both ends of the preheater body 20 are connected with reversing valves 40, an air pipe 50 is connected between the two reversing valves 40, a self-sealing port 60 is provided on the preheater body 20, the self-sealing port 60 is connected with the heating pipe in the preheater body 20, a telescopic joint 70 is provided on the base 10 and is detachably connected with the self-sealing port 60, and a cleaning port 80 is also provided on the preheater body 20. Among them, when the preheater body 20 needs to be cleaned, the reversing valve 40 and the air pipe 50 are used to bypass the preheater body 20 and then discharge the hot exhaust gas of the dry quenching furnace, which does not affect the normal exhaust of the dry quenching furnace. The cleaning liquid is added to the preheater body 20 through the cleaning port, and the connection with the preheater body 20 is disconnected by the expansion joint 70. Then, the driving member 30 drives the preheater body 20 to rotate, so that the cleaning liquid shakes and impacts in the preheater body 20 to produce a flushing effect, which can effectively reduce the cleaning dead corners, and finally the cleaning liquid can be discharged through the cleaning port.

[0032] See also Figure 1-Figure 5 The reversing valve 40 is mounted on the base 10, and a rotary joint 90 is provided on the reversing valve 40 to communicate with the air port of the preheater body 20. The interface on the reversing valve 40 is fixed, and is connected with the rotating preheater body 20 through the rotary joint 90.

[0033] See also Figure 1-Figure 5 The driving member 30 includes a worm wheel 31, a worm 32 and a motor 33. The worm wheel 31 is connected to the shaft of the preheater body 20, the worm 32 is rotatably connected to the base 10, the worm 32 is meshed with the worm wheel 31, and the output end of the motor 33 is connected to the shaft of the worm 32. The motor 33 drives the preheater body 20 to rotate through the meshing of the worm 32 and the worm wheel 31, and the torque is greater, which facilitates the shaking and impact of the cleaning liquid in the preheater body 20, thereby improving the cleaning effect.

[0034] See also Figure 1-Figure 5 The self-sealing port 60 includes a sleeve 61, and a gate 62 is elastically connected to the sleeve 61, and the gate 62 is movably sealed to the sleeve 61. When the preheater body 20 rotates, the spring behind the gate 62 presses the gate 62 tightly to seal the mouth of the sleeve 61, thereby achieving sealing, and the hot water originally in the preheater body 20 continues to remain inside.

[0035] See also Figure 1-Figure 5The expansion joint 70 includes an expansion tube 71, the lower end of which is fixedly connected to the base 10, and the upper end of which is movably connected to the sleeve 61. The expansion joint 70 also includes an electric cylinder 72, which is mounted on the base 10, and the expansion end of the electric cylinder 72 is fixedly connected to the expansion end of the expansion tube 71. The electric cylinder 72 pushes the expansion tube 71 out to achieve docking with the self-sealing opening 60. When the electric cylinder 72 shrinks with the expansion tube 71, the self-sealing opening 60 is prevented from interfering with the expansion joint 70 when the preheater body 20 rotates.

[0036] See also Figure 1-Figure 5 A push rod 73 is fixedly connected to the telescopic end of the telescopic tube 71, and the push rod 73 is movably pressed against the gate plate 62. When the telescopic tube 71 is ejected, the push rod 73 is used to push the gate plate 62 open, so as to achieve the effect of automatic connection.

[0037] See also Figure 1-Figure 5 The lower end of the telescopic tube 71 is provided with a heat pipe port 74 connected to an external water supply pipeline. The heat pipe port 74 is used to connect the water supply pipeline. It should be noted that both heat pipe ports 74 are externally connected to a solenoid valve. When the expansion joint 70 is disconnected from the self-sealing port 60, the solenoid valve is closed to prevent the water supply pressure from overflowing from the telescopic tube 71.

[0038] The working principle of the feed water preheater is as follows: the exhaust gas of the dry quenching furnace passes through the reversing valve 40 into the preheater body 20, and then is discharged from the reversing valve 40 at the other end. The feed water enters the preheater body 20 through the self-sealing port 60 and the telescopic joint 70, is heated, and then flows out. When the preheater body 20 needs to be cleaned, first, the two reversing valves 40 are reversed, and the exhaust gas of the dry quenching furnace is discharged from the air pipe 50 after bypassing the preheater body 20. Then the electric cylinder 72 contracts with the telescopic tube 71, and the gate plate 62 loses the push of the push rod 73. The gate plate 62 is blocked at the mouth of the sleeve 61 under the push of the spring to achieve self-sealing. Then, the cleaning liquid is poured into the cleaning port 80 and closed. The motor 33 drives the preheater body 20 to rotate through the meshing of the worm gear 31 and the worm 32. The cleaning liquid shakes and hits the preheater in the preheater body 20. The inner wall of the main body 20 is cleaned. After cleaning, the cleaning port is turned to the bottom to pour out the cleaning liquid, and then clean water is injected to rinse it. Finally, the preheater body 20 is connected to the dry quenching furnace again, and the high-temperature exhaust gas of the dry quenching furnace is used to dry the preheater body 20. In summary, when the preheater body 20 needs to be cleaned, the reversing valve 40 and the air pipe 50 are used to bypass the hot exhaust gas of the dry quenching furnace and discharge it after bypassing the preheater body 20, which does not affect the normal exhaust of the dry quenching furnace. Cleaning liquid is added to the preheater body 20 through the cleaning port, and the expansion joint 70 is used to disconnect the connection with the preheater body 20. Then the driving member 30 drives the preheater body 20 to rotate, so that the cleaning liquid shakes and impacts in the preheater body 20 to produce a flushing effect, which can effectively reduce the cleaning dead corners, and finally the cleaning liquid can be discharged through the cleaning port.

[0039] The above are only embodiments of the present application and are not intended to limit the scope of protection of the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, improvement or equivalent replacement made within the spirit and principle of the present application shall be included in the scope of protection of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

Claims

1. A feed water preheater, characterized in that: The invention comprises a base (10), a preheater body (20) and a driving member (30), wherein the driving member (30) drives the preheater body (20) to rotate on the base (10), the air ports at both ends of the preheater body (20) are connected to reversing valves (40), an air pipe (50) is connected between the two reversing valves (40), a self-sealing port (60) is provided on the preheater body (20), the self-sealing port (60) is connected to a heating pipe in the preheater body (20), a telescopic joint (70) is provided on the base (10) and is detachably connected to the self-sealing port (60), and a cleaning port (80) is also provided on the preheater body (20).

2. A feedwater preheater according to claim 1, characterized in that: The reversing valve (40) is mounted on the base (10), and a rotary joint (90) is provided on the reversing valve (40) and is communicated with the air port of the preheater body (20).

3. A feedwater preheater according to claim 2, characterized in that: The driving member (30) comprises a worm wheel (31), a worm (32) and a motor (33); the worm wheel (31) is connected to the shaft of the preheater body (20); the worm (32) is rotatably connected to the base (10); the worm (32) is meshed with the worm wheel (31); and the output end of the motor (33) is connected to the shaft of the worm (32).

4. A feedwater preheater according to claim 3, characterized in that: The self-sealing opening (60) comprises a sleeve (61), a gate plate (62) is elastically connected inside the sleeve (61), and the gate plate (62) is movably sealed to the sleeve (61).

5. A feedwater preheater according to claim 4, characterized in that: The telescopic joint (70) comprises a telescopic tube (71), the lower end of the telescopic tube (71) is fixedly connected to the base (10), and the upper end of the telescopic tube (71) is movably plugged into the sleeve (61).

6. A feedwater preheater according to claim 5, characterized in that: The telescopic joint (70) further comprises an electric cylinder (72), wherein the electric cylinder (72) is mounted on the base (10), and the telescopic end of the electric cylinder (72) is fixedly connected to the telescopic end of the telescopic tube (71).

7. A feedwater preheater according to claim 6, characterized in that: A push rod (73) is fixedly connected inside the telescopic end of the telescopic tube (71), and the push rod (73) is movably pressed against the gate plate (62).

8. A feedwater preheater according to claim 7, characterized in that: The lower end of the telescopic tube (71) is provided with a heat pipe port (74) which is communicated with an external water supply pipeline.

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