An electrically heated sealing valve seat

Abstract

This utility model relates to the field of blast furnace metallurgical equipment technology, specifically to an electrically heated sealing valve seat, including an annular valve seat fixed below the upper shell of the material tank, with an electric heating mechanism disposed on the side wall of the annular valve seat. The electric heating mechanism, composed of a heating wire, junction box, cable, and temperature control cabinet, can achieve more precise temperature control and higher heat transfer efficiency than traditional steam heating methods. Furthermore, the electric heating mechanism is simple in composition, with all equipment located around the material tank, eliminating the need for water pressure testing and reducing costs. On the other hand, the construction of the junction box and the first and second flanges makes equipment installation and daily maintenance simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace metallurgical equipment technology, specifically to an electric heating sealing valve seat. Background Technology

[0002] The upper sealing valve of the blast furnace feed hopper is installed on the upper part of the weighing hopper. After the receiving hopper stops feeding, it seals the weighing hopper to ensure smooth high-pressure operation of the blast furnace. The upper sealing valve consists of a valve seat, a valve plate, and a drive mechanism. The valve seat is fixed to the upper flange of the weighing hopper, and the valve plate is mounted on the drive mechanism. The drive mechanism can rotate the valve plate, which is equipped with a silicone rubber sealing ring. When the valve plate is closed, it contacts the valve seat. As the drive mechanism continues to operate, the sealing ring is compressed, creating a complete seal between the valve plate and the valve seat. This ensures high-pressure operation inside the feed hopper and prevents blast furnace gas leakage. The valve seat is equipped with a heating device to control the contact surface between the valve seat and the valve plate within a certain temperature range, preventing condensation or moisture buildup at the seal that could affect sealing performance. Currently, similar products on the market use valve seats that are bolted to the flange of the upper shell of the tank. A sealing ring is installed between the flange and the valve seat to prevent airflow from leaking out from this plane. A protective ring is bolted to the valve seat to prevent excessive compression of the silicone rubber sealing ring on the valve plate when the valve plate and valve seat are in sealing contact. The bottom of the valve seat has a weld overlay layer and an internal annular cavity. One end is welded to the steam heating pipe inlet, and the other end is welded to the steam heating pipe outlet. The steam heating pipe consists of a steel pipe, flange, bolts, and gasket. The steel pipe is sealed by welding when it exits the upper shell of the tank. During heating, external steam enters the annular cavity of the sealing valve seat through the steam heating pipe inlet, thereby heating the valve seat and maintaining it within a certain temperature range. Finally, the steam is discharged from the steam heating pipe outlet at the other end.

[0003] The main disadvantages of the aforementioned prior art are:

[0004] 1) Precise temperature control is difficult to achieve. Steam pipelines need to be laid from steam production to the sealing valve seat. The distance is long, and heat is lost during the transmission process. The actual effective heat is lower than the theoretical value, resulting in large temperature fluctuations.

[0005] 2) The system is complex and has high maintenance costs. The laying of high-pressure steam pipelines, the recovery of condensate, the risks of pipeline corrosion, and safety protection measures all contribute to a large workload of daily maintenance and repair.

[0006] 3) The sealing valve seat is difficult and costly to process. The annular cavity of the sealing valve seat is first processed from the bottom or side, and then sealed by welding. The sealing performance requirement is high. This process is difficult and involves a large amount of processing. Welding defects are also prone to occur, which will cause the subsequent water pressure test of the cavity to fail, resulting in rework and repair, and increasing costs.

[0007] Therefore, developing a new type of sealing valve seat to improve the above problems is of great practical significance.

[0008] In view of this, this utility model is hereby proposed. Utility Model Content

[0009] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an electric heating sealing valve seat, which is mainly used to solve the problems of difficult laying and installation of high-pressure steam pipelines, risk of condensate recovery, and low heat transfer efficiency in the prior art.

[0010] This utility model provides an electrically heated sealing valve seat, including an annular valve seat fixed below the upper shell of the material tank, and an electrically heated mechanism is provided on the side wall of the annular valve seat.

[0011] Specifically, the electric heating mechanism includes a heating wire, the annular valve seat is fixedly connected to a cable via the heating wire, and the cable is fixedly connected to the temperature control cabinet.

[0012] Specifically, one end of the heating wire is wrapped around the periphery of the annular valve seat.

[0013] Specifically, the heating wire and the cable are fixedly connected via a junction box.

[0014] Specifically, the electric heating mechanism is provided with a protective mechanism, which includes a protective cover that wraps around the junction box.

[0015] Specifically, the protection mechanism further includes a first steel pipe, which is sleeved around the heating wire between the junction box and the annular valve seat; the protection mechanism also includes a second steel pipe, which is sleeved around the cable between the protective cover and the upper shell of the tank.

[0016] Specifically, the protective cover is fixedly connected to the second steel pipe via a first flange and a second flange, and a sealing gasket is provided between the first flange and the second flange.

[0017] Specifically, a protective sleeve is installed at the end of the second steel pipe near the temperature control cabinet.

[0018] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0019] This utility model provides an electrically heated sealing valve seat, including an annular valve seat fixed below the upper shell of a material tank, with an electric heating mechanism disposed on the side wall of the annular valve seat. The electric heating mechanism, composed of a heating wire, junction box, cable, and temperature control cabinet, can achieve more precise temperature control and higher heat transfer efficiency than traditional steam heating methods. Furthermore, the electric heating mechanism is simple in composition, with all equipment located around the material tank, eliminating the need for a water pressure test and resulting in lower costs. Additionally, the construction of the junction box and the first and second flanges simplifies equipment installation and daily maintenance. Attached Figure Description

[0020] The accompanying drawings are incorporated in and form part of this specification, and together with the description, serve to explain the principles of this invention.

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the electric heating sealing valve seat of this utility model;

[0023] Figure 2 This is a schematic diagram of the electric heating mechanism of the valve seat of the electric heating sealing valve of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the electric heating sealing valve seat of this utility model, in which the heating wire surrounds the annular valve seat.

[0025] in:

[0026] 1. Valve seat; 2. First bolt; 3. Sealing ring; 4. Second bolt; 5. Protective ring; 6. Heating wire; 7. Junction box; 8. Cable; 9. Temperature control cabinet; 10. First steel pipe; 11. Protective cover; 12. First flange; 13. Sealing gasket; 14. Second flange; 15. Third bolt; 16. Second steel pipe; 17. Protective sleeve; 18. Pressure plate; 19. Fourth bolt; 20. Upper shell of the tank; 21. Sealing valve drive device; 22. Sealing valve plate. Detailed Implementation

[0027] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples of apparatuses consistent with some aspects of this invention as detailed in the appended claims.

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] refer to Figure 1 and Figure 2 This utility model provides an electrically heated sealing valve seat, including an annular valve seat 1 fixed below the upper housing 20 of the material tank. The annular valve seat 1 is fixed to the flange of the upper housing 20 of the material tank by a first bolt 2. A sealing ring 3 is also provided between the flange of the upper housing 20 of the material tank and the annular valve seat 1 to prevent the airflow in the upper part of the material tank from leaking out from this plane. A protective ring 5 is also fixedly connected below the annular valve seat 1 by a second bolt 4 to prevent the silicone rubber sealing ring 3 on the sealing valve plate 22 from being excessively squeezed when the sealing valve plate 22 is in sealing contact with the annular valve seat 1. An electric heating mechanism is also provided on the outside of the annular valve seat 1.

[0030] Based on the above structure, the electric heating mechanism includes a heating wire 6. One end of the heating wire 6 is fixedly connected to the annular valve seat 1 via a fourth bolt 19 and a pressure plate 18, and the other end is fixedly connected to a temperature control cabinet 9 via a cable 8. The temperature control cabinet 9 is used to precisely adjust the temperature of the heating wire 6. The heating mechanism also includes a junction box 7, which is located between the heating wire 6 and the cable 8. The heating wire 6 and the cable 8 are fixedly connected inside the junction box 7.

[0031] To prevent harmful gases such as coal gas inside the tank from contacting the electric heating mechanism, a protective mechanism is provided outside the electric heating mechanism. The protective mechanism includes a protective cover 11 wrapped around the junction box 7; the protective mechanism also includes a first steel pipe 10, which is sleeved around the heating wire 6 between the junction box 7 and the annular valve seat 1; the protective mechanism also includes a second steel pipe 16, which is sleeved around the cable 8 between the protective cover 11 and the upper shell 20 of the tank, and is fixedly connected to the upper shell 20 of the tank. To ensure the airtightness of the equipment, welding is preferred; at the same time, a protective sleeve 17 is provided at the end of the second steel pipe 16 near the temperature control cabinet 9, which can prevent the cable 8 from rubbing against the second steel pipe 16 and prevent foreign objects from entering the protective device.

[0032] To address the inconvenience of routine maintenance, the protective cover 11 and the second steel pipe 16 are fixedly connected by a first flange 12 and a second flange 14. The first flange 12 is fixedly connected to the protective cover 11, and the second flange 14 is fixedly connected to the second steel pipe 16. The first flange 12 and the second flange 14 are fixedly connected by a third bolt 15. A sealing gasket 13 is also provided between the first flange 12 and the second flange 14 to ensure airtightness.

[0033] refer to Figure 3 One end of the heating wire 6 is wrapped around the outside of the annular valve seat 1. In order to ensure heating efficiency, the heating wire 6 is folded and wrapped in multiple layers, preferably two layers. At the same time, the annular valve seat 1 is provided with a corresponding groove on the outside.

[0034] The usage process of the electrically heated sealing valve seat in the above embodiments is as follows:

[0035] During heating, the temperature control cabinet 9 is set and adjusted to the required temperature, and the heating wire 6 is activated to heat the valve seat of the sealing valve, keeping it at a certain temperature to prevent condensation or moisture from forming on the sealing surface between the valve plate 22 and the annular valve seat 1, which would affect the sealing performance.

[0036] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model.

[0037] It should be understood that this utility model is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. An electrically heated seat valve seat, characterized in that, Includes an annular valve seat (1) fixed below the upper shell (20) of the material tank, and an electric heating mechanism is provided on the side wall of the annular valve seat (1); The electric heating mechanism includes a heating wire (6), the annular valve seat (1) is fixedly connected to a cable (8) via the heating wire (6), and the cable (8) is fixedly connected to a temperature control cabinet (9); The heating wire (6) is fixedly connected to the annular valve seat (1) by the fourth bolt (19) and the pressure plate (18).

2. The valve seat of the electrically heated sealing valve according to claim 1, characterized in that, One end of the heating wire (6) is wrapped around the periphery of the annular valve seat (1).

3. The valve seat of the electrically heated sealing valve according to claim 1, characterized in that, The heating wire (6) and the cable (8) are fixedly connected by a junction box (7).

4. The valve seat of the electrically heated sealing valve according to claim 3, characterized in that, The electric heating mechanism is provided with a protective mechanism, which includes a protective cover (11) that is wrapped around the junction box (7).

5. The valve seat of the electrically heated sealing valve according to claim 4, characterized in that, The protection mechanism also includes a first steel pipe (10), which is sleeved on the heating wire (6) between the junction box (7) and the annular valve seat (1); the protection mechanism also includes a second steel pipe (16), which is sleeved on the cable (8) between the protective cover (11) and the upper shell (20) of the material tank.

6. The valve seat of the electrically heated sealing valve according to claim 4, characterized in that, The protective cover (11) and the second steel pipe (16) are fixedly connected by the first flange (12) and the second flange (14), and a sealing gasket (13) is provided between the first flange (12) and the second flange (14).

7. The valve seat of the electrically heated sealing valve according to claim 5, characterized in that, The second steel pipe (16) has a protective sleeve (17) at the end near the temperature control cabinet (9).

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