Insulation sealing structure of high-voltage electrode boiler

Abstract

The utility model relates to an insulation sealing structure of high voltage electrode boiler, including electrode, annular ceramic insulator, flange sleeve, flange pressure plate and support plate, flange sleeve is equipped with support plate inside, the electrode passes through annular ceramic insulator, the middle part of annular ceramic insulator is outwards equipped with limit protrusion, the flange pressure plate is equipped with the support plate inside the flange sleeve, the limit protrusion is equipped with the flange pressure plate inside the flange sleeve. The annular ceramic insulating part is limited between the supporting plate and the flange pressing plate through a limiting protrusion, the limiting protrusion comprises an upper arc-shaped section, a vertical section and a lower arc-shaped section which are sequentially arranged, the upper arc-shaped section is sleeved with an upper edge-covered graphite ring, the lower arc-shaped section is sleeved with a lower edge-covered graphite ring, and a graphite strip is wound outside the vertical section. According to the utility model, the contact area between the annular ceramic insulating part and the edge-covered graphite ring is increased through the arrangement of the limiting bulge, so that better attachment is facilitated, the graphite ring with the metal edge-covered can be used for relieving the impact collapse and graphite loss caused by medium scouring to graphite, and a better sealing effect is achieved, so that the use pressure of the electrode boiler is higher than 5MPa.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial boilers, in particular to an insulation and sealing structure of a high-voltage electrode boiler, which is used for sealing the electrode connection of the high-voltage electrode boiler. Background Art

[0002] With the implementation of the dual-carbon policy, higher requirements have been put forward for carbon reduction in the traditional boiler industry. Compared with traditional coal-fired boilers and gas boilers, high-voltage electrode boilers are a kind of clean steam supply and heating industrial boiler equipment. Electrode boilers have great advantages in solving the carbon emissions of traditional fossil energy and can make positive contributions to the realization of the dual-carbon goal.

[0003] At present, electrode boilers are still applied to the traditional heating industry, and the design pressure of electrode boilers is within 5 MPa. With the implementation of the dual-carbon policy in all walks of life, higher requirements have been put forward for the performance of electrode boilers. Especially in application scenarios that require high-pressure steam such as oilfield steam injection and new energy power generation for steam, this requires electrode boilers to have higher operating pressures. And how to improve the pressure resistance of the existing insulating part packing seal is the key to the development of high-pressure electrode boilers.

[0004] The middle part of the insulating part of the existing electrode boiler is installed with a pure graphite ring structure. However, when producing high-pressure parameter steam, the fit between the graphite ring and the insulating part is poor, and the fit gap is too large. Under the scouring of high-pressure media, the pure graphite ring is extremely easy to dissolve and scatter, greatly reducing the sealing performance and the sealing pressure resistance level, and unable to withstand operating pressures above 5 MPa. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the above deficiencies and provide an insulation and sealing structure of a high-voltage electrode boiler. The upper and lower arc segments of the limiting protrusion increase the contact area between the ring-shaped ceramic insulating part and the edge-wrapped graphite ring, facilitating better fitting. The graphite ring with a metal edge can slow down the scouring and graphite loss caused by the medium scouring, achieving a better sealing effect, so that the operating pressure of the electrode boiler can be higher than 5 MPa.

[0006] The purpose of the utility model is realized as follows:

[0007] An insulation and sealing structure of a high-voltage electrode boiler includes an electrode, a ring-shaped ceramic insulating part, a flange sleeve, a flange pressing plate and a support plate. A support plate is arranged inside the flange sleeve. The electrode is arranged inside the ring-shaped ceramic insulating part. A limiting protrusion is arranged outward in the middle of the ring-shaped ceramic insulating part. The ring-shaped ceramic insulating part is limited between the support plate and the flange pressing plate through the limiting protrusion. The limiting protrusion includes an upper arc segment, a vertical segment and a lower arc segment arranged in sequence. An upper edge-wrapped graphite ring is sleeved outside the upper arc segment, a lower edge-wrapped graphite ring is sleeved outside the lower arc segment, and a graphite strip is wound outside the vertical segment.

[0008] Preferably, the upper edge-wrapped graphite ring includes an upper graphite ring body and an upper metal edge wrap. The upper plane and the outer side surface of the upper graphite ring body are provided with the upper metal edge wrap. The lower edge-wrapped graphite ring includes a lower graphite ring body and a lower metal edge wrap. The bottom plane and the outer side surface of the lower graphite ring body are provided with the lower metal edge wrap.

[0009] Preferably, the flange pressing plate is formed by welding an inner sleeve and an upper flange. The flange sleeve is formed by welding an outer sleeve and a lower flange. The inner sleeve and the outer sleeve are matched with each other, and the upper flange and the lower flange are connected by bolts.

[0010] Preferably, a graphite flat gasket is further provided above the support plate. The graphite flat gasket is sleeved outside the annular ceramic insulator and is arranged below the lower edge-wrapped graphite ring.

[0011] Preferably, the upper metal edge wrap is in contact with the end face of the inner sleeve and the inner side wall of the outer sleeve respectively. The lower metal edge wrap is in contact with the graphite flat gasket and the inner side wall of the outer sleeve respectively.

[0012] Preferably, the height of the upper edge-wrapped graphite ring is 20 - 25 mm, and the height of the lower edge-wrapped graphite ring is 12 - 25 mm.

[0013] Preferably, a toothed gasket is provided at the upper and lower sealing joints of the electrode and the annular ceramic insulator.

[0014] The beneficial effects of the present utility model are as follows:

[0015] The upper and lower arc segments of the limiting protrusion increase the contact area between the annular ceramic insulator and the edge-wrapped graphite ring, facilitating better fitting. The graphite ring with a metal edge wrap can slow down the erosion and collapse of graphite caused by medium erosion and graphite loss, improve the assembly accuracy of the annular ceramic insulator and the edge-wrapped graphite ring to achieve better fitting between the graphite ring and the insulator, and achieve a better sealing effect, so that the electrode boiler can use a pressure higher than 5 MPa, enabling the electrode boiler to be used and promoted under higher pressure working conditions and in the industry, providing strong support for the implementation of the dual-carbon policy;

[0016] At the upper and lower sealing joints of the electrode and the annular ceramic insulator, a toothed gasket is used to replace the traditional flat gasket, strengthening the sealing effect of the sealing area and improving the sealing pressure resistance level. Description of the Drawings

[0017] Figure 1 is a schematic diagram of an insulating and sealing structure of a high-voltage electrode boiler of the present utility model.

[0018] Figure 2 is Figure 1 a partial enlarged view of

[0019] Wherein: electrode 1; annular ceramic insulator 2; upper arc segment 2.1; vertical segment 2.2; lower arc segment 2.3; flange sleeve 3; outer sleeve 3.1; lower flange 3.2; flange pressing plate 4; inner sleeve 4.1; upper flange 4.2; support plate 5; upper edge-wrapped graphite ring 6; upper graphite ring body 6.1; upper metal edge 6.2; lower edge-wrapped graphite ring 7; lower graphite ring body 7.1; lower metal edge 7.2; graphite strip 8; graphite flat gasket 9; serrated gasket 10. Detailed implementation mode

[0020] See Figure 1 and Figure 2 As shown in and, the utility model relates to an insulating and sealing structure of a high-voltage electrode boiler, which comprises an electrode 1, an annular ceramic insulator 2, a flange sleeve 3, a flange pressing plate 4 and a support plate 5. The flange pressing plate 4 is nested with the flange sleeve 3 and fixed by bolts. A support plate 5 is arranged in the flange sleeve 3. The electrode 1 is arranged in the annular ceramic insulator 2. A limiting protrusion is arranged outward in the middle of the annular ceramic insulator 2. The annular ceramic insulator 2 is limited between the support plate 5 and the flange pressing plate 4 through the limiting protrusion. The limiting protrusion comprises an upper arc segment 2.1, a vertical segment 2.2 and a lower arc segment 2.3 which are arranged in sequence. An upper edge-wrapped graphite ring 6 is sleeved outside the upper arc segment 2.1, a lower edge-wrapped graphite ring 7 is sleeved outside the lower arc segment 2.3, and a graphite strip 8 is wound outside the vertical segment 2.2. The upper edge-wrapped graphite ring 6 comprises an upper graphite ring body 6.1 and an upper metal edge 6.2. The upper metal edge 6.2 is arranged on the upper plane and the outer side surface of the upper graphite ring body 6.1. The lower edge-wrapped graphite ring 7 comprises a lower graphite ring body 7.1 and a lower metal edge 7.2. The lower metal edge 7.2 is arranged on the bottom plane and the outer side surface of the lower graphite ring body 7.1.

[0021] The flange pressing plate 4 is formed by welding an inner sleeve 4.1 and an upper flange 4.2. The flange sleeve 3 is formed by welding an outer sleeve 3.1 and a lower flange 3.2. The inner sleeve 4.1 is matched with the outer sleeve 3.1, and the upper flange 4.2 and the lower flange 3.2 are connected by bolts.

[0022] The support plate 5 is provided with a through hole corresponding to the lower part of the annular ceramic insulator 2. The inner diameter of the inner sleeve 4.1 is adapted to the upper part of the annular ceramic insulator 2.

[0023] In order to facilitate leveling, a graphite flat gasket 9 is further arranged above the support plate 5. The graphite flat gasket 9 is sleeved outside the annular ceramic insulator 2 and is arranged below the lower edge-wrapped graphite ring 7.

[0024] The upper metal edge 6.2 is in contact with the end face of the inner sleeve and the inner side wall of the outer sleeve respectively. The lower metal edge 7.2 is in contact with the graphite flat gasket and the inner side wall of the outer sleeve respectively.

[0025] A toothed gasket 10 is provided at the upper and lower sealed connection of the electrode 1 and the annular ceramic insulator 2. The toothed gasket 10 replaces the traditional flat gasket, strengthens the sealing effect of the sealing area, and improves the sealing pressure resistance level.

[0026] The height of the upper edge-wrapped graphite ring 6 is 20 - 25 mm, and the height of the lower edge-wrapped graphite ring 7 is 12 - 25 mm.

[0027] The upper and lower arc segments of the limiting protrusion increase the contact area between the annular ceramic insulator and the edge-wrapped graphite ring, facilitating better fitting. The graphite ring with a metal edge can slow down the erosion and graphite loss caused by medium erosion to the graphite, improve the assembly accuracy of the annular ceramic insulator and the edge-wrapped graphite ring to achieve better fitting between the graphite ring and the insulator, and achieve a better sealing effect, so that the operating pressure of the electrode boiler can be higher than 5 MPa, enabling the electrode boiler to be used and promoted under higher pressure conditions and in the industry, providing strong support for the implementation of the dual-carbon policy.

[0028] In addition to the above embodiments, the present utility model also includes other implementation manners. Any technical solutions formed by equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present utility model.

Claims

1. An insulating sealing structure of a high-voltage electrode boiler, comprising an electrode, an annular ceramic insulating member, a flange sleeve, a flange pressure plate and a support plate, wherein the flange sleeve is provided with a support plate, and the electrode is inserted into the annular ceramic insulating member, characterized in that: A limiting protrusion is provided outwardly at the middle part of the annular ceramic insulating member, and the annular ceramic insulating member is limited between the support plate and the flange pressure plate by the limiting protrusion. The limiting protrusion includes an upper arc segment, a vertical segment and a lower arc segment arranged in sequence. The upper arc segment is provided with an upper edge-wrapped graphite ring on the outer sleeve, and the lower arc segment is provided with a lower edge-wrapped graphite ring on the outer sleeve, and a graphite strip is wrapped around the vertical segment.

2. The insulating sealing structure of a high-voltage electrode boiler according to claim 1, characterized in that: The upper-edge-wrapped graphite ring comprises an upper graphite ring body and an upper metal edging, the upper plane and outer side surface of the upper graphite ring body are provided with an upper metal edging, and the lower-edge-wrapped graphite ring comprises a lower graphite ring body and a lower metal edging, the bottom plane and outer side surface of the lower graphite ring body are provided with a lower metal edging.

3. The insulating sealing structure of a high-voltage electrode boiler according to claim 1 or 2, characterized in that: The flange pressure plate is formed by welding an inner sleeve and an upper flange, and the flange sleeve is formed by welding an outer sleeve and a lower flange. The inner sleeve matches the outer sleeve, and the upper flange and the lower flange are connected by bolts.

4. The insulating sealing structure of a high-voltage electrode boiler according to claim 3, characterized in that: A graphite flat gasket is also arranged above the support plate. The graphite flat gasket is sleeved outside the annular ceramic insulating member and is arranged below the lower edge-wrapped graphite ring.

5. The insulating sealing structure of a high-voltage electrode boiler according to claim 1, characterized in that: The height of the upper edge-wrapped graphite ring is 20-25 mm, and the height of the lower edge-wrapped graphite ring is 12-25 mm.

6. The insulating sealing structure of a high-voltage electrode boiler according to claim 1, characterized in that: Tooth-shaped gaskets are arranged at the upper and lower sealing connections between the electrode and the annular ceramic insulating member.

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