Electric heating sealing valve seat capable of adjusting temperature

Abstract

The invention relates to the technical field of blast furnace metallurgical equipment, in particular to a temperature-adjustable electric heating seal valve seat which comprises a valve seat fixed below an upper shell of a charging bucket, and an electric heating mechanism is arranged on the side wall of the valve seat. An electric heating mechanism composed of a heating wire, a junction box, a cable and a temperature control cabinet can achieve more accurate temperature control and higher heat transfer efficiency compared with a traditional steam heating mode. Meanwhile, the electric heating mechanism is simple in composition, all devices are arranged on the periphery of the charging bucket, a hydrostatic test is not needed, and the cost is lower; and on the other hand, the junction box, the first flange and the second flange are constructed, so that equipment installation and daily maintenance are simple and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace metallurgical equipment, and in particular to a temperature-adjustable electrically heated sealing valve seat. Background Art

[0002] The upper sealing valve of the blast furnace charging tank is installed above the weighing tank. After the receiving tank stops feeding, the weighing tank is sealed to ensure smooth high-pressure operation of the blast furnace. The upper sealing valve consists of a sealing valve seat, a sealing valve disc, and a drive mechanism. The sealing valve seat is fixed to the upper flange of the weighing tank. The sealing valve disc is mounted on the drive mechanism, which can drive the sealing valve disc to rotate. The sealing valve disc is installed with a silicone rubber sealing ring. When the sealing valve disc is closed, the sealing valve disc and the sealing valve seat contact. The drive mechanism continues to operate, and the sealing valve disc sealing ring is compressed, completely sealing the sealing valve disc and the sealing valve seat. This ensures high-pressure operation inside the charging tank 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 sealing valve disc to maintain a certain temperature range, so as to prevent condensation or moisture accumulation in the seal area, which may affect the sealing performance. Similar products currently on the market feature a valve seat bolted to the flange of the upper tank shell. A sealing ring is installed between the flange and the valve seat to prevent airflow from leaking out of this plane. A protective ring is bolted to the valve seat to prevent excessive squeezing of the silicone rubber sealing ring on the sealing valve disc when the valve disc and seat come into sealing contact. The bottom of the valve seat has a weld overlay and an annular cavity machined inside. The steam heating pipe inlet is welded to one end and the steam heating pipe outlet to the other. The steam heating pipe is composed of a steel pipe, flange, bolts, and a sealing gasket. When the steel pipe is discharged from the upper tank shell, it is sealed and welded. During heating, external steam enters the annular cavity of the sealing valve seat from the steam heating pipe inlet, thereby heating the valve seat and keeping it within a certain temperature range. The steam is finally discharged from the steam heating pipe outlet at the other end.

[0003] The shortcomings of the above-mentioned prior art mainly include:

[0004] 1) It is difficult to achieve precise temperature control. From the steam output to the sealing valve seat, a steam pipeline needs to be laid. 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, condensate recovery, the risk of pipeline corrosion, and safety measures all contribute to the heavy workload of daily maintenance and overhaul.

[0006] 3) The processing difficulty and cost of the sealing valve seat are high. The annular cavity of the sealing valve seat is first processed from the bottom or side, and then sealed and welded. High sealing requirements are required. This process is difficult and labor-intensive. Welding is also prone to defects, causing subsequent hydrostatic tests on the cavity to fail, resulting in rework and repair, increasing costs.

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

[0008] In view of this, this invention is proposed. Summary of the Invention

[0009] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a temperature-adjustable electrically heated sealing valve seat, which is mainly used to solve the problems of the prior art such as the difficulty in laying and installing high-pressure steam pipelines, the risk of condensate recovery, and low heat transfer efficiency.

[0010] The present invention provides a temperature-adjustable electrically heated sealing valve seat, comprising a valve seat fixed below an upper shell of a material tank, wherein an electric heating mechanism is provided on a side wall of the valve seat.

[0011] Specifically, the electric heating mechanism includes a heating wire, the 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 surrounds the periphery of the valve seat.

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

[0014] Specifically, a protection mechanism is provided outside the electric heating mechanism, and the protection mechanism includes a protection cover wrapped around the outside of the junction box.

[0015] Specifically, the protection mechanism also includes a first steel pipe, which is sleeved outside the heating wire between the junction box and the valve seat; the protection mechanism also includes a second steel pipe, which is sleeved outside 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 cover is provided on the port of the second steel pipe close to one end of the temperature control cabinet.

[0018] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0019] The present invention provides a temperature-adjustable electrically heated sealing valve seat, comprising a valve seat fixed below the upper shell of a material tank, with an electric heating mechanism disposed on the sidewalls of the valve seat. The electric heating mechanism, consisting of a heating wire, a junction box, cables, and a temperature control cabinet, achieves more precise temperature control and more efficient heat transfer than traditional steam heating methods. Furthermore, the electric heating mechanism is simple to construct, with all equipment located near the material tank and no hydrostatic testing required, resulting in lower costs. Furthermore, the structure of the junction box and the first and second flanges facilitates simple and convenient installation and routine maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of the temperature-adjustable electrically heated sealing valve seat of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the electric heating mechanism of the valve seat of the electric heating sealing valve with adjustable temperature of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the valve seat of the temperature-adjustable electrically heated sealing valve of the present invention with the heating wire surrounding the 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 cover; 18. Pressure plate; 19. Fourth bolt; 20. Upper shell of the tank; 21. Sealing valve drive device; 22. Sealing valve plate. DETAILED DESCRIPTION

[0027] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of arrangements consistent with certain aspects of the present invention as detailed in the appended claims.

[0028] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0029] refer to Figure 1 and Figure 2 The present invention provides a temperature-adjustable electrically heated sealing valve seat, comprising a valve seat 1 fixed to the bottom of the upper shell 20 of the material tank, the valve seat 1 being fixed to the flange of the upper shell 20 of the material tank by a first bolt 2, and a sealing ring 3 being provided between the flange of the upper shell 20 of the material tank and the valve seat 1 to prevent the air flow above the material tank from leaking out of this plane; a protective ring 5 is also fixedly connected to the bottom of the 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 valve seat 1; an electric heating mechanism is also provided on the outside of the valve seat 1.

[0030] Based on the above structure, the electric heating mechanism includes a heating wire 6, one end of which is fixedly connected to the 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 accurately adjust the temperature of the heating wire 6. The heating mechanism also includes a junction box 7, which is provided 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] In order to prevent harmful gases such as coal gas inside the material tank from contacting the electric heating mechanism, a protective mechanism is provided on the outside of the electric heating mechanism, and the protective mechanism includes a protective cover 11 wrapped around the outside of the junction box 7; the protective mechanism also includes a first steel pipe 10, which is sleeved on the outside of the heating wire 6 between the junction box 7 and the valve seat 1; the protective mechanism also includes a second steel pipe 16, which is sleeved on the outside of the cable 8 between the protective cover 11 and the upper shell 20 of the material tank, and is fixedly connected to the upper shell 20 of the material tank. In order to ensure the airtightness of the equipment, welding is preferably performed; at the same time, a protective cover 17 is provided at the port of the second steel pipe 16 near one end of 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] In order to solve the problem of inconvenience in daily 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 air tightness.

[0033] refer to Figure 3 One end of the heating wire 6 is wrapped around the outside of the valve seat 1. In order to ensure heating efficiency, the heating wire 6 is folded and wrapped around multiple layers, preferably 2 layers; at the same time, a corresponding groove is provided on the outside of the valve seat 1.

[0034] The process of using the temperature-adjustable electrically heated sealing valve seat in the above embodiment 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 started to heat the sealing valve seat to keep it at a certain temperature to avoid condensation or moisture and dust accumulation on the sealing surface of the sealing valve plate 22 and the valve seat 1 affecting the sealing performance.

[0036] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. 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 the present invention.

[0037] It should be understood that the present invention is not limited to the above description and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A temperature-adjustable electrically heated sealing valve seat, characterized in that: The invention comprises a valve seat (1) fixed to the outlet of the upper shell (20) of the material tank, and an electric heating mechanism is provided on the side wall of the valve seat (1).

2. The temperature-adjustable electrically heated sealing valve seat according to claim 1, characterized in that: The electric heating mechanism comprises a heating wire (6), the 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).

3. The temperature-adjustable electrically heated sealing valve seat according to claim 2, characterized in that: One end of the heating wire (6) surrounds the periphery of the valve seat (1).

4. The temperature-adjustable electrically heated sealing valve seat according to claim 2, characterized in that: The heating wire (6) and the cable (8) are fixedly connected via a junction box (7).

5. The temperature-adjustable electrically heated sealing valve seat according to claim 4, characterized in that: A protection mechanism is provided outside the electric heating mechanism, and the protection mechanism comprises a protection cover (11) wrapped around the outside of the junction box (7).

6. The temperature-adjustable electrically heated sealing valve seat according to claim 5, characterized in that: The protection mechanism further comprises a first steel pipe (10), which is sleeved on the outside of the heating wire (6) between the junction box (7) and the valve seat (1); the protection mechanism further comprises a second steel pipe (16), which is sleeved on the outside of the cable (8) between the protection cover (11) and the upper shell (20) of the tank.

7. The temperature-adjustable electrically heated sealing valve seat according to claim 5, characterized in that: The protective cover (11) and the second steel pipe (16) are fixedly connected via a first flange (12) and a second flange (14), and a sealing gasket (13) is provided between the first flange (12) and the second flange (14).

8. The temperature-adjustable electrically heated sealing valve seat according to claim 6, characterized in that: A protective sleeve (17) is provided at a port of the second steel pipe (16) close to one end of the temperature control cabinet (9).

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