Automatic pressure stabilizing mechanism for furnace changing fan of hot blast stove

Abstract

The utility model belongs to the technical field of hot-blast stoves, and discloses an automatic pressure stabilizing mechanism for a hot-blast stove changing fan, which comprises a hot-blast stove body, the bottom of the hot-blast stove body is fixedly connected with a supporting seat, the top end of the supporting seat is communicated with the interior of the hot-blast stove body through a circulating groove, and one side end of the supporting seat is hollow. An air inlet fan is fixedly mounted on the outer wall of one end of the supporting seat, the output end of the air inlet fan is fixedly communicated with one end of the supporting seat, and an electromagnetic valve is arranged at the output end of the air inlet fan; the filter screen arranged in the supporting seat plays a role in effectively filtering and purifying air from the air inlet fan, and meanwhile, the filter screen can be effectively extracted and operated in the supporting seat as required in cooperation with a sealing plate, a connecting rod, a pin shaft and a handle ring, so that the effect of effectively cleaning the surface of the filter screen is achieved, and the service life of the filter screen is prolonged. Therefore, the air inlet effect in the hot-blast stove body is prevented from being affected by the blocking state.

Description

Technical Field

[0001] The present application relates to the technical field of hot blast stoves, and more specifically, to an automatic voltage stabilizing mechanism for a hot blast stove fan changer. Background Art

[0002] The hot blast stove is an auxiliary device that provides high-temperature hot air for the blast furnace. During the operation of the hot blast stove, the stability and continuity of the air supply to the blast furnace must be ensured to prevent serious production accidents.

[0003] After searching the publication number: CN215571242U, a hot blast furnace furnace changing fan automatic pressure stabilizing system is disclosed, including a hot blast furnace body, a furnace changing air duct, a furnace changing booster fan, an air outlet duct, a negative pressure bin, a PLC control host, a pressure sensor, an air intake fan, etc.; this application overcomes the traditional furnace changing operation of the hot blast furnace, because it needs to be heated to store heat, and then blow air, and the heating and blowing air are performed alternately, which often causes wind pressure fluctuations on the blast flow and temperature of the blast furnace due to the operation of opening and closing each valve, which can easily lead to the problem of blast furnace slippage.

[0004] However, during use, it is difficult to extract and clean the filter screen used in this application, and it is easy for the surface of the filter screen to be blocked due to long-term use, thereby affecting the air intake effect inside the hot air furnace body.

[0005] In order to solve the above problems, the present application provides an automatic voltage stabilizing mechanism for a hot blast furnace changer fan. Utility Model Content

[0006] The present application provides an automatic voltage stabilizing mechanism for a hot blast furnace fan changer, which adopts the following technical solution:

[0007] A hot blast stove furnace fan automatic voltage stabilizing mechanism comprises a hot blast stove body, the bottom of the hot blast stove body is fixedly connected with a support seat, the top of the support seat is connected with the inside of the hot blast stove body through a flow slot, and one side end of the support seat is hollowed out, an air intake fan is fixedly installed on the outer wall of one end of the support seat, the output end of the air intake fan is fixedly connected with one end of the support seat, and a solenoid valve is arranged on the output end of the air intake fan, a filter screen is movably sleeved on the inner wall of one side of the support seat, and the filter screen is located in the hot blast stove A sealing plate is provided on one side below the main body and on the other side below the hot air furnace main body, the sealing plate is located on one side of the horizontal direction of the filter screen, and the sealing plate is movably sleeved on the inner wall of one side of the hollow end of the support seat, and a connecting rod is fixedly installed at the center position of the sealing plate and the end face opposite to the filter screen, a pin shaft is inserted at one side of the top end of the support seat, a socket is provided at the top end of the sealing plate, and the top end of the sealing plate is plugged and adapted with the bottom end of the pin shaft through the socket, and a handle ring is fixedly installed on the end face of the sealing plate facing away from the filter screen, and the handle ring is located outside the support seat.

[0008] Through the above technical solution, the connecting rod realizes a stable connection between the sealing plate and the filter screen.

[0009] Furthermore, the outer side walls of the filter screen and the sealing plate are fixedly sleeved with sealing sleeves, and the outer side walls of the filter screen and the sealing plate are movably sleeved with the inner wall of the support seat through the sealing sleeves.

[0010] Through the above technical solution, the sealing sleeve ensures the sealing contact effect between the two and the inner wall of the support seat.

[0011] Furthermore, an extension strip is fixedly mounted on the outer side wall of the bottom end of the handle ring, the extension strip contacts one end surface of the sealing plate, and the bottom end of the extension strip extends to a side surface of the bottom end of the support seat.

[0012] Furthermore, a scraper is provided on one side of the bottom end of the filter screen facing the air intake fan, the bottom of the scraper contacts the inner wall of the bottom end of the support seat, and two fixing rods are fixedly installed at the connection between the upper side of the scraper and the lower side of the filter screen.

[0013] Through the above technical solution, the scraper can realize the incidental cleaning of impurities accumulated on the inner wall of the bottom end of the support seat.

[0014] Furthermore, an electromagnetically controlled butterfly valve is arranged on the upper side of the hot blast stove body, and a furnace changing air duct is fixedly installed on the top of the hot blast stove body, and a furnace changing booster fan and an electromagnetic one-way air inlet valve are respectively arranged vertically inside the upper side of the furnace changing air duct.

[0015] Through the above technical solution, the electromagnetic one-way air inlet valve realizes the control of the internal state of the furnace exchange air duct.

[0016] Furthermore, a negative pressure bin is fixedly sleeved on one side end of the hot air furnace body, an air outlet pipe is fixedly installed on one side of the top of the negative pressure bin, one end of the air outlet pipe is connected to the inner wall of the hot air furnace body, and an electromagnetic control valve is provided at one end of the air outlet pipe close to the negative pressure bin, and the air outlet pipe is located at a lower position on one side of the electromagnetic control butterfly valve.

[0017] Through the above technical solution, the electromagnetic control valve realizes the control of the flow state inside the air outlet pipe.

[0018] Furthermore, a pressure sensor is embedded and fixedly installed on one side end of the hot air furnace body, and the pressure sensor is located below the negative pressure chamber. A PLC control host is arranged at an oblique side position outside the support seat, and a base bracket is fixedly installed at the rear end of the PLC control host.

[0019] Through the above technical solution, the base bracket can achieve stable support for the PLC control host.

[0020] In summary, this application includes the following beneficial technical effects:

[0021] The support seat is provided to support the main structure thereon, and at the same time, the air intake fan and solenoid valve are utilized to realize the air intake end function inside the hot blast furnace body. The filter screen provided inside the support seat can effectively filter and purify the gas from the air intake fan, and at the same time, in conjunction with the sealing plate, connecting rod, pin shaft and handle ring, the filter screen can be effectively extracted from the support seat when needed, thereby realizing the effective cleaning effect on the surface of the filter screen, thereby preventing it from being blocked and affecting the air intake effect inside the hot blast furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of this application;

[0023] Figure 2 It is a schematic diagram of the local structure of this application;

[0024] Figure 3 This is a partial semi-exploded view of this application.

[0025] Description of the numbers in the figure:

[0026] 1. Hot air furnace body; 2. Support seat; 3. Inlet fan; 4. Solenoid valve; 5. Filter; 6. Sealing plate; 7. Connecting rod; 8. Pin shaft; 9. Handle ring; 10. Extension strip; 11. Scraper; 12. Fixing rod; 13. Solenoid-controlled butterfly valve; 14. Furnace change air duct; 15. Negative pressure chamber; 16. Air outlet duct; 17. Solenoid-controlled valve; 18. Pressure sensor; 19. PLC control host. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0028] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. Example

[0030] The present application embodiment discloses an automatic voltage stabilizing mechanism for a hot blast furnace changer fan. Figure 1 , Figure 2 and Figure 3 , including a hot blast stove body 1, a support seat 2 is fixedly connected to the bottom of the hot blast stove body 1, the top of the support seat 2 is connected to the inside of the hot blast stove body 1 through a flow slot, and one side of the support seat 2 is hollowed out, an air intake fan 3 is fixedly installed on the outer wall of one end of the support seat 2, the output end of the air intake fan 3 is fixedly connected to one end of the support seat 2, and a solenoid valve 4 is provided at the output end of the air intake fan 3, a filter screen 5 is movably sleeved on the inner wall of one side of the support seat 2, and the filter screen 5 is located on one side below the hot blast stove body 1, and the hot A sealing plate 6 is provided on the other side below the furnace body 1. The sealing plate 6 is located on one side of the horizontal direction of the filter screen 5, and the sealing plate 6 is movably sleeved on the inner wall of one side of the hollow end of the support seat 2, and a connecting rod 7 is fixedly installed at the center position of the sealing plate 6 and the filter screen 5 on the opposite end surface. A pin shaft 8 is plugged into one side of the top of the support seat 2, and a plug hole is opened at the top of the sealing plate 6, and the top of the sealing plate 6 is plugged and adapted with the bottom end of the pin shaft 8 through the plug hole. A handle ring 9 is fixedly installed on the end surface of the sealing plate 6 away from the filter screen 5, and the handle ring 9 is located outside the support seat 2;

[0031] The outer walls of the filter screen 5 and the sealing plate 6 are fixedly sleeved with a sealing sleeve, and the outer walls of the filter screen 5 and the sealing plate 6 are movably sleeved with the inner wall of the support seat 2 through the sealing sleeve, and an extension strip 10 is fixedly installed on the outer wall of the bottom end of the ring 9, and the extension strip 10 contacts one end face of the sealing plate 6, and the bottom end of the extension strip 10 extends to a side surface of the bottom end of the support seat 2. By setting the extension strip 10 at the bottom end of the ring 9, it is possible to effectively limit the placement position of the filter screen 5 and the sealing plate 6 when the filter screen 5 is placed inside the support seat 2 again after cleaning, thereby facilitating the plug-in positioning work of the pin shaft 8 on the sealing plate 6. A scraper 11 is provided on one side of the bottom end of the filter screen 5 facing the air intake fan 3, and the bottom of the scraper 11 contacts the inner wall of the bottom end of the support seat 2, and two fixing rods 12 are fixedly installed at the connection between the upper side of the scraper 11 and the lower side of the filter screen 5.

[0032] See also Figure 1An electromagnetically controlled butterfly valve 13 is arranged on the upper side of the hot blast stove body 1, and a furnace changing air duct 14 is fixedly installed on the top of the hot blast stove body 1, and a furnace changing booster fan and an electromagnetic one-way air inlet valve are respectively arranged vertically inside the upper side of the furnace changing air duct 14, and a negative pressure bin 15 is fixedly sleeved on one side end of the hot blast stove body 1, and an air outlet pipe 16 is fixedly installed on one side of the top of the negative pressure bin 15, one end of the air outlet pipe 16 is connected to the inner wall of the hot blast stove body 1, and an electromagnetically controlled valve 17 is arranged on one end of the air outlet pipe 16 close to the negative pressure bin 15, and the air outlet pipe 16 is located at a lower position on one side of the electromagnetically controlled butterfly valve 13, and a pressure sensor 18 is embedded and fixedly installed on one side end of the hot blast stove body 1, and the pressure sensor 18 is located at a lower position of the negative pressure bin 15, and a PLC control host 19 is arranged at an oblique side position outside the support seat 2, and a base bracket is fixedly installed at the rear end of the PLC control host 19.

[0033] The implementation principle of this embodiment is: when in use, the hot blast furnace body 1, the air intake fan 3, the solenoid valve 4, the solenoid control butterfly valve 13, the furnace change air duct 14, the negative pressure chamber 15, the air outlet duct 16, the solenoid control valve 17, the pressure sensor 18, the PLC control host 19, the furnace change booster fan, and the solenoid one-way air intake valve are all the prior art with the same structure and principle as the comparative document publication number: CN215571242U, and can effectively perform the furnace change work while achieving the automatic stabilization effect under the furnace change work. The specific process can refer to the content in the comparative document, and no further elaboration is made here;

[0034] When the hot blast furnace body 1 uses the air intake fan 3 to realize the air intake work inside the support base 2, the gas entering the support base 2 passes through the filter 5 to realize the filtering and purification of impurities in the gas, and the filtered impurities adhere to the surface of one end of the filter 5 facing the air intake fan 3;

[0035] When necessary, the pin shaft 8 can be pulled out first, and the handle ring 9 can be used to drive the sealing plate 6 to indirectly realize the horizontal extraction operation of the filter screen 5 inside the support seat 2, thereby facilitating the cleaning of impurities on the surface of the filter screen 5. During the passive horizontal extraction process of the filter screen 5, the scraper 11 moves synchronously with it, so as to realize the synchronous cleaning of the impurity particles dropped and accumulated on the inner wall of the bottom end of the support seat 2.

[0036] The above are all 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. An automatic voltage stabilizing mechanism for a hot blast furnace fan, comprising a hot blast furnace body (1), characterized in that: The bottom of the hot blast stove body (1) is fixedly connected to a support seat (2), the top of the support seat (2) is connected to the inside of the hot blast stove body (1) through a flow slot, and one side end of the support seat (2) is designed to be hollow, an air intake fan (3) is fixedly installed on the outer wall of one end of the support seat (2), the output end of the air intake fan (3) is fixedly connected to one end of the support seat (2), and a solenoid valve (4) is provided at the output end of the air intake fan (3), a filter screen (5) is movably sleeved on the inner wall of one side of the support seat (2), and the filter screen (5) is located on one side below the hot blast stove body (1), and the hot blast stove body (1) is located below the hot blast stove body (1). A sealing plate (6) is provided on the other side of the side, the sealing plate (6) is located on one side of the filter screen (5) in the horizontal direction, and the sealing plate (6) is movably sleeved on the inner wall of one side of the hollow end of the support seat (2), and a connecting rod (7) is fixedly installed at the center position of the sealing plate (6) and the filter screen (5) on the end face opposite to the sealing plate (6), a pin shaft (8) is inserted on one side of the top end of the support seat (2), a plug hole is opened on the top end of the sealing plate (6), and the top end of the sealing plate (6) is plugged and matched with the bottom end of the pin shaft (8) through the plug hole, and a handle ring (9) is fixedly installed on the end face of the sealing plate (6) away from the filter screen (5), and the handle ring (9) is located outside the support seat (2).

2. The automatic voltage stabilizing mechanism for a hot blast furnace changer fan according to claim 1, characterized in that: The outer side walls of the filter screen (5) and the sealing plate (6) are both fixedly sleeved with sealing sleeves, and the outer side walls of the filter screen (5) and the sealing plate (6) are movably sleeved with the inner wall of the support seat (2) through the sealing sleeves.

3. The automatic voltage stabilizing mechanism for a hot blast stove fan according to claim 1, characterized in that: An extension strip (10) is fixedly mounted on the outer side wall of the bottom end of the handle ring (9), the extension strip (10) contacts one end surface of the sealing plate (6), and the bottom end of the extension strip (10) extends to a side surface of the bottom end of the support seat (2).

4. The automatic voltage stabilizing mechanism for a hot blast stove replacement fan according to claim 1, characterized in that: A scraper (11) is provided on one side of the bottom end of the filter screen (5) facing the air intake fan (3); the bottom of the scraper (11) contacts the inner wall of the bottom end of the support seat (2); and two fixing rods (12) are fixedly mounted at the connection between the upper side of the scraper (11) and the lower side of the filter screen (5).

5. The automatic voltage stabilizing mechanism for a hot blast stove replacement fan according to claim 1, characterized in that: An electromagnetically controlled butterfly valve (13) is arranged on the upper side of the hot blast stove body (1), and a furnace changing air duct (14) is fixedly installed on the top of the hot blast stove body (1), and a furnace changing booster fan and an electromagnetic one-way air inlet valve are respectively arranged vertically inside the upper side of the furnace changing air duct (14).

6. The automatic voltage stabilizing mechanism for a hot blast stove replacement fan according to claim 5, characterized in that: A negative pressure chamber (15) is fixedly sleeved on one side end of the hot blast furnace body (1), an air outlet pipe (16) is fixedly installed on one side of the top end of the negative pressure chamber (15), one end of the air outlet pipe (16) is connected to the inner wall of the hot blast furnace body (1), and an electromagnetic control valve (17) is provided at one end of the air outlet pipe (16) close to the negative pressure chamber (15), and the air outlet pipe (16) is located at a lower position on one side of the electromagnetic control butterfly valve (13).

7. The automatic voltage stabilizing mechanism for a hot blast stove replacement fan according to claim 6, characterized in that: A pressure sensor (18) is embedded and fixedly installed at one side end of the hot air furnace body (1), and the pressure sensor (18) is located below the negative pressure chamber (15). A PLC control host (19) is provided at an oblique side position outside the support seat (2), and a base bracket is fixedly installed at the rear end of the PLC control host (19).

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