Electrode stem sealing device of ammonia synthesis electric furnace

Abstract

The utility model discloses an electrode stem sealing device of an ammonia synthesis electric furnace, which relates to the technical field of sealing and comprises a furnace cover and an electrode stem, a sealing cylindrical bin is fixedly connected onto the furnace cover, the electrode stem penetrates through the furnace cover and is coaxial with the sealing cylindrical bin, and a fire-resistant groove is arranged on the furnace cover at the center of the sealing cylindrical bin. A fireproof groove is formed in the sealing cylindrical bin, a limiting groove and a first mounting groove are sequentially formed above the fireproof groove, a fire insulation pad is arranged in the fireproof groove, a fixing device is arranged in the limiting groove, a first sealing pad is arranged in the first mounting groove, a second sealing pad is arranged on the fixing device, and the sealing cylindrical bin is in threaded connection with a locking cover device. A third sealing gasket is arranged in the center of the locking cover device, an air pump device is arranged on the locking cover device, a sealing bin can be formed at the sealing position while the temperature of the sealing position can be reduced, the air pump device is used for pressurizing the sealing bin to balance the internal pressure and the external pressure of the sealing position, the sealing effect is greatly improved, and the device is simple in structure, convenient to use and high in practicability. And mounting, dismounting and maintenance are convenient.

Description

Technical Field

[0001] This utility model belongs to the field of sealing technology, specifically relating to an electrode rod sealing device for an ammonia synthesis electric furnace. Background Technology

[0002] Although existing electric furnaces have undergone significant improvements and the sealing effect has been greatly enhanced, the problem of air leakage from the electrode rods after the furnace is shut down has not been completely resolved.

[0003] For example, Chinese patent application number CN202221341582.6 discloses an electrode rod installation structure. A furnace tail sealing plate is provided at the end of the process furnace, with an electrode rod insertion port on the furnace tail sealing plate. A stepped seat is welded to the electrode rod insertion port, and a transition plate is fitted on the outside of the stepped seat. A sealing ring is provided in the annular groove of the contact surface between the transition plate and the stepped seat. An electrode sealing seat is fitted on the outside of the transition plate, and a fixing assembly for fixing the electrode rod is provided on the outside of the electrode sealing seat. The electrode rod passes through the electrode sealing seat and extends into the process furnace. The stepped seat is welded to the furnace tail sealing plate, and the transition plate is fitted on the outside of the stepped seat. The sealing ring is located in the annular groove of the contact surface between the transition plate and the stepped seat, keeping the sealing ring away from the high-temperature area of ​​the furnace cavity, improving the service life of the sealing ring, and solving the problem of easy aging and leakage of the sealing ring at high temperatures. The sealing ring in the annular groove of the contact surface between the electrode sealing seat and the transition plate effectively improves the sealing performance of the equipment. The aforementioned sealing methods are quite complex and inconvenient to install and maintain. Furthermore, during the operation of the ammonia synthesis electric furnace, the temperature of the electrode rod is much higher than that of the furnace cover. Due to the different materials of the electrode rod and the furnace cover, the amount of thermal deformation is also different. Under high pressure, the sealing device is still very prone to leakage, which makes the temperature and pressure inside the furnace unstable and affects normal production. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides an electrode rod sealing device for an ammonia synthesis electric furnace. A sealing chamber is set at the sealing point between the electrode rod and the furnace cover, and pressure is applied to the sealing chamber to balance the internal and external pressures at the sealing point, greatly improving the sealing effect. Moreover, the structure is simple and easy to install, disassemble and maintain.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows:

[0006] An electrode rod sealing device for an ammonia synthesis electric furnace includes a furnace cover and an electrode rod. A sealing cylindrical chamber is fixedly connected to the furnace cover. The electrode rod passes through the furnace cover and is coaxial with the sealing cylindrical chamber. A refractory groove is formed on the furnace cover at the center of the sealing cylindrical chamber. A limiting groove and a first mounting groove are sequentially arranged above the refractory groove. A fireproof gasket is arranged in the refractory groove. A fixing device is arranged in the limiting groove. A first sealing gasket is arranged in the first mounting groove. A second sealing gasket is arranged on the fixing device. A locking cover device is threadedly connected to the sealing cylindrical chamber. A third sealing gasket is arranged at the center of the locking cover device. An air pump device is arranged on the locking cover device. The electrode rod is sealed and connected to the fireproof gasket, the first sealing gasket, the second sealing gasket, and the third sealing gasket. The locking cover device is screwed downward to press down the second sealing gasket and the fixing device, and simultaneously press down the first sealing gasket and the fireproof gasket to seal the electrode rod. The air pump device pressurizes the sealing cylindrical chamber to balance the internal and external pressure at the seal.

[0007] As a further feature of the above scheme, the inner wall of the sealed cylindrical chamber is provided with a locking internal thread, the lower end of the fireproof gasket is provided with an upper conical inclined block, and the center of the lower end of the first sealing gasket is provided with a lower conical inclined block.

[0008] As a further provision of the above solution, the fixing device includes a fixing plate, a third mounting groove is provided at the center of the upper surface of the fixing plate, a first fixing collar is provided at the center of the lower surface of the fixing plate, a second fixing collar is provided at the lower end of the first fixing collar, and an inclined pressure groove is provided on the inner wall of the second fixing collar.

[0009] As a further feature of the above solution, the locking cover device includes a locking round cover with a fixing groove on its outer edge. A locking ring is fixedly connected to the lower end face of the locking round cover. The outer wall of the locking ring has a locking external thread. A pressure plate is provided inside the locking ring. A positioning groove is provided on the lower end face of the pressure plate. The pressure plate and the locking round cover form a sealing chamber.

[0010] This utility model has the following beneficial effects:

[0011] By setting a sealing cylindrical chamber on the furnace cover, the locking cover device is screwed down to press the second sealing gasket and the fixing device, which, together with the first sealing gasket and the fireproof gasket, seals the electrode rod, reducing the temperature at the sealing point and forming a sealing chamber at the sealing point. The air pump device pressurizes the sealing chamber to balance the internal and external pressure at the sealing point, greatly improving the sealing effect. Moreover, the structure is simple and easy to install, disassemble and maintain. Attached Figure Description

[0012] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0013] Figure 2 This is an exploded view of the present invention;

[0014] Figure 3 This is a schematic diagram of the furnace cover of this utility model;

[0015] Figure 4 This is a schematic diagram of the sealing gasket of this utility model;

[0016] Figure 5 This is a schematic diagram of the fixing device of this utility model;

[0017] Figure 6 This is a schematic diagram of the locking cover device of this utility model.

[0018] 1. Furnace cover; 2. Electrode rod; 3. Fireproof pad; 4. Fixing device; 5. First sealing gasket; 6. Second sealing gasket; 7. Locking cover device; 8. Third sealing gasket; 101. Sealing cylindrical chamber; 1011. Locking internal thread; 102. Refractory groove; 103. Limiting groove; 1031. First mounting groove; 301. Upper conical inclined block; 401. Fixing plate; 4011. Third mounting groove; 402. First fixing collar; 403. Second fixing collar; 4031. Inclined pressure groove; 501. Lower conical inclined block; 701. Locking round cover; 7011. Fixing groove; 702. Locking ring; 7021. Locking external thread; 703. Air pump device; 704. Pressure plate; 7041. Positioning groove. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-6 This application will be described in detail with reference to the embodiments.

[0021] like Figure 1 , Figure 2 , Figure 3As shown, an electrode rod sealing device for an ammonia synthesis electric furnace includes a furnace cover 1 and an electrode rod 2. A sealing cylindrical chamber 101 is fixedly connected to the furnace cover 1. The electrode rod 2 penetrates the furnace cover 1 and is coaxial with the sealing cylindrical chamber 101. A refractory groove 102 is opened on the furnace cover 1 at the center of the sealing cylindrical chamber 101. A limiting groove 103 and a first mounting groove 1031 are sequentially arranged above the refractory groove 102. A fireproof pad 3 is arranged in the refractory groove 102. A fixing device 4 is arranged in the limiting groove 103. A first sealing pad 5 is arranged in the first mounting groove 1031. A sealing device 4 is provided at the upper end of the fixing device 4. A second sealing gasket 6 is provided, and a locking cover device 7 is threadedly connected to the sealing cylindrical chamber 101. A third sealing gasket 8 is provided at the center of the locking cover device 7. An air pump device 703 is provided on the locking cover device 7. The electrode rod 2 is sealed and connected to the fireproof gasket 3, the first sealing gasket 5, the second sealing gasket 6 and the third sealing gasket 8. The locking cover device 7 is screwed downward to press down the second sealing gasket 6 and the fixing device 4, and at the same time press down the first sealing gasket 5 and the fireproof gasket 3 to seal the electrode rod 1. The air pump device 703 pressurizes the sealing cylindrical chamber 101 to balance the internal and external pressure at the seal.

[0022] like Figure 3 , Figure 4 As shown, the inner wall of the sealed cylindrical chamber 101 is provided with a locking internal thread 1011, the lower end of the fireproof gasket 3 is provided with an upper conical inclined block 301, and the lower center of the first sealing gasket 5 is provided with a lower conical inclined block 501.

[0023] like Figure 5 , Figure 6 As shown, the fixing device 4 includes a fixing plate 401, a third mounting groove 4011 is opened at the center of the upper end face of the fixing plate 401, a first fixing collar 402 is provided at the center of the lower end face of the fixing plate 401, a second fixing collar 403 is provided at the lower end of the first fixing collar 402, and an inclined pressure groove 4031 is provided on the inner wall of the second fixing collar 403. The locking cover device 7 includes a locking round cover 701, a fixing groove 7011 is opened on the outer edge of the locking round cover 701, a locking ring 702 is fixedly connected to the lower end face of the locking round cover 701, a locking external thread 7021 is opened on the outer wall of the locking ring 702, a pressure plate 704 is provided inside the locking ring 702, a positioning groove 7041 is opened on the lower end face of the pressure plate 704, and the pressure plate 704 and the locking round cover 701 form a sealing chamber.

[0024] The working process of this utility model is as follows: When sealing the electrode rod 2, the electrode rod 2 passes through the sealing cylindrical chamber 101. The fireproof pad 3 is placed in the fireproof groove 102. The first sealing pad 5 is sleeved on the first fixed shaft ring 402. The second sealing pad 6 is placed in the third mounting groove 4011. The fixing device 4 passes through the electrode rod 2 and is pressed downward into the sealing cylindrical chamber 101. A tool is used to clamp the fixing groove 7011 and rotate the locking ring. The locking internal thread 1011 is threadedly connected to the locking external thread 7021. The locking cover device 7 moves downward, and the positioning groove 704... 1. When the second sealing gasket 6 comes into contact with the pressure plate 704, the pressure plate 704 presses down to tighten the second sealing gasket 6 and the fixing device 4. The lower conical inclined block 501 contacts the first mounting groove 1031, and the upper conical inclined block 301 contacts the inclined pressure groove 4031, increasing the sealing contact area and squeezing the first sealing gasket 5, the fireproof gasket 3, and the second sealing gasket 6. At the same time, the electrode rod 2, the sealing cylindrical chamber 101, and the locking cover device 7 are sealed. The air pump device 703 pressurizes the sealing chamber between the pressure plate 704 and the locking cover 701 to balance the internal and external pressure at the sealing point and improve the sealing effect.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electrode rod sealing device for an ammonia synthesis electric furnace, comprising a furnace cover and an electrode rod, characterized in that, A sealed cylindrical chamber is fixedly connected to the furnace cover. The electrode rod passes through the furnace cover and is coaxial with the sealed cylindrical chamber. A refractory groove is opened on the furnace cover at the center of the sealed cylindrical chamber. A limiting groove and a first installation groove are arranged sequentially above the refractory groove. A fireproof pad is arranged in the refractory groove. A fixing device is arranged in the limiting groove. A first sealing gasket is arranged in the first installation groove. A second sealing gasket is arranged on the fixing device. A locking cover device is threadedly connected to the sealed cylindrical chamber. A third sealing gasket is arranged at the center of the locking cover device. An air pump device is arranged on the locking cover device. The electrode rod is sealed and connected to the fireproof pad, the first sealing gasket, the second sealing gasket, and the third sealing gasket.

2. The electrode rod sealing device for an ammonia synthesis electric furnace according to claim 1, characterized in that, The inner wall of the sealed cylindrical chamber is provided with locking internal threads, the lower end of the fireproof gasket is provided with an upper conical inclined block, and the center of the lower end of the first sealing gasket is provided with a lower conical inclined block.

3. The electrode rod sealing device for the ammonia synthesis electric furnace according to claim 1, characterized in that, The fixing device includes a fixing plate, a third mounting groove is opened at the center of the upper surface of the fixing plate, a first fixing collar is provided at the center of the lower surface of the fixing plate, a second fixing collar is provided at the lower end of the first fixing collar, and an inclined pressure groove is provided on the inner wall of the second fixing collar.

4. The electrode rod sealing device for an ammonia synthesis electric furnace according to claim 1, characterized in that, The locking cover device includes a locking round cover with a fixing groove on its outer edge. A locking ring is fixedly connected to the lower end face of the locking round cover. The outer wall of the locking ring has a locking external thread. A pressure plate is provided inside the locking ring, and a positioning groove is provided on the lower end face of the pressure plate.

Images