Multi-layer sealed thermal-expansion-resistant water-cooling capacitive outgoing line sleeve

Abstract

The utility model discloses a multi-layer sealed thermal-expansion-resistant water-cooling capacitive outgoing line sleeve, which comprises a conducting rod, a capacitor sleeve, an epoxy sleeve, a spring mechanism and a flange pipe, two ends of the conducting rod are an air side and a hydrogen side respectively; the capacitor sleeve is sleeved outside the conducting rod; the epoxy sleeve sleeves one end, close to the hollow side of the conductive rod, of the capacitor sleeve; a pressing ring is arranged at one end, far away from the hollow side of the conducting rod, of the epoxy sleeve; the spring mechanism is arranged on the conducting rod, is positioned between the port of the capacitor sleeve and the epoxy sleeve, and is used for ensuring the sealing performance of the conducting rod after being heated and expanded; the flange pipe is sleeved outside the capacitor sleeve, and one end of the flange pipe is connected with the epoxy sleeve through a pressing ring. According to the multi-layer sealed anti-thermal-expansion water-cooling capacitive outgoing line sleeve, the sealing problem after the conducting rod is heated and expanded is solved, the localization rate of nuclear power equipment is improved, and dependence on foreign technologies is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of outlet bushings, in particular to a multi-layer sealed heat expansion resistant water-cooled capacitor type outlet bushing. Background Art

[0002] The 1100MW nuclear power unit marks a significant milestone in the construction and operation of nuclear power plants, representing the advancement and efficiency of nuclear power technology. The 1100MW unit's lead bushings utilize internal water cooling, ensuring effective temperature control even under high-power operation, thereby guaranteeing stable and safe operation of the entire nuclear power plant.

[0003] However, the line bushings for 1100MW nuclear power units have long relied mainly on imports, which not only increases costs but also may pose certain risks in the supply chain. At the same time, the poor sealing performance and intolerance to thermal expansion of water-cooled capacitor line bushings limit production efficiency. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a multi-layer sealed heat-expansion-resistant water-cooled capacitor outlet bushing, which solves the sealing problem after the conductive rod expands due to heat, improves the localization rate of nuclear power equipment, and reduces dependence on foreign technology.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the utility model provides a multi-layer sealed heat-expansion-resistant water-cooled capacitor outlet bushing, including a conductive rod, a capacitor bushing, an epoxy bushing, a spring mechanism and a flange tube; the two ends of the conductive rod are the air side and the hydrogen side respectively; the capacitor bushing is sleeved on the outside of the conductive rod; the epoxy bushing is sleeved on the end of the capacitor bushing close to the air side of the conductive rod; the end of the epoxy bushing away from the air side of the conductive rod is provided with a pressure ring; the spring mechanism is provided on the conductive rod and is located between the capacitor bushing port and the epoxy bushing, which is used to ensure the sealing of the conductive rod after thermal expansion; the flange tube is sleeved on the outside of the capacitor bushing, and one end is connected to the epoxy bushing through a pressure ring.

[0006] Furthermore, the spring mechanism includes a sealing plate, a set of first sealing rings, a spring plate, a set of washers, a connecting plate, and a set of connecting screws. The sealing plate is located at one end of the capacitor bushing near the free side of the conductive rod, with a first sealing ring disposed therebetween for sealing. The spring plate is located near the free side of the conductive rod, with a washer disposed therebetween. A first sealing ring is disposed therebetween for sealing between the washer and the sealing plate. The connecting plate is located near the free side of the conductive rod, with a washer disposed therebetween. Connecting screws are disposed on the circumference of the connecting plate, and the connecting plate is connected to the conductive rod via the connecting screws. The first sealing ring and washer cooperate with the spring plate to solve the sealing problem caused by thermal expansion of the conductive rod.

[0007] Furthermore, the spring plate is annular and has a plurality of through holes on its end surface; the spring mechanism further comprises a plurality of springs, which are arranged in the through holes. The springs provide a buffer for the thermal expansion of the conductive rod.

[0008] Furthermore, the conductive rod is provided with a plurality of conductive rod sealing grooves at both ends of the capacitor bushing and at the end of the epoxy bushing near the air side. A second sealing ring is provided in each of the conductive rod sealing grooves for assembly sealing. The conductive rod sealing grooves cooperate with the second sealing ring to ensure sealing during the conductive rod assembly process.

[0009] Furthermore, the conductive rod has two milled notches on its hydrogen-side periphery; end shield springs are located within these milled notches; an airtightness test air inlet is located on the hollow side of the conductive rod; and an airtightness test air outlet is located adjacent to the conductive rod sealing groove on the hollow side of the conductive rod. The airtightness test air inlet, along with the airtightness test air outlet, is used for post-assembly airtightness testing to ensure the equipment's airtightness.

[0010] Furthermore, a grounding hole is provided on the peripheral surface of the capacitor bushing near the hydrogen side of the conductive rod, and a capacitor bushing opening is provided at one end of the capacitor bushing near the hydrogen side of the conductive rod. The provision of the capacitor bushing opening prevents axial movement of the capacitor bushing.

[0011] Furthermore, the flange pipe includes an air-side flange, a flange sleeve, and a hydrogen-side flange; the air-side flange is connected to one end of the epoxy sleeve via a pressure ring; the air-side flange is welded to the flange sleeve; the flange sleeve is welded to the hydrogen-side flange; a group of end screen holes are provided on the circumference of the hydrogen-side flange; the end screen holes are located outside the grounding hole and have the same diameter as the grounding hole; a group of flange pipe sealing grooves are provided inside the hydrogen-side flange; a third sealing ring is provided in the flange pipe sealing groove for assembly and sealing. The end screen holes cooperate with the grounding hole to achieve the grounding function; the flange pipe sealing groove cooperates with the third sealing ring to ensure the sealing of the flange pipe after assembly.

[0012] Furthermore, an O-ring and a sealing gasket are provided between the epoxy sleeve and the air side flange for sealing, thereby ensuring the sealing of the connection between the epoxy sleeve and the flange pipe.

[0013] Furthermore, a cork rubber pad is provided between the capacitor sleeve and the flange sleeve to fill the gap between the two and ensure their stability.

[0014] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0015] 1. This utility model is a multi-layer sealed anti-thermal expansion water-cooled capacitor outlet bushing, which solves the sealing problem of thermal expansion of the conductive rod through the setting of the spring mechanism;

[0016] 2. The utility model is a multi-layer sealed heat expansion resistant water-cooled capacitor outlet bushing. Through the design of several sealing grooves and sealing rings, the sealing performance of the entire bushing assembly process is ensured, the localization rate of nuclear power equipment is improved, and the dependence on foreign technology is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to the present invention;

[0018] Figure 2 This is a schematic diagram of a spring mechanism in a multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to the present invention;

[0019] Figure 3 This is a schematic diagram of a spring plate in a multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to the present invention;

[0020] Figure 4 This is a half-section view of a conductive rod in a multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to the present invention;

[0021] Figure 5 This is a side view of a conductive rod in a multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to the present invention;

[0022] Figure 6 This is a schematic diagram of the hydrogen side of the conductive rod in a multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to the present invention;

[0023] Figure 7 This is a schematic diagram of the air side of the conductive rod in a multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to the present invention;

[0024] Figure 8 This is a schematic diagram of a capacitor bushing in a multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to the present invention;

[0025] Figure 9 This is a schematic diagram of the stop of a capacitor bushing in a multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing described in the present invention;

[0026] Figure 10 This is a schematic diagram of a flange pipe in a multi-layer sealed, heat-expansion-resistant water-cooled capacitor outlet bushing according to the present invention;

[0027] Figure 11 This is a side view of a flange tube in a multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to the present invention;

[0028] Figure 12This is a partial exploded view of the flange tube in the multi-layer sealed, heat-expansion-resistant water-cooled capacitor outlet bushing described in the present invention;

[0029] Figure 13 This is a partial exploded view of the connection between the epoxy bushing and the air-side flange in a multi-layer sealed, heat-expansion-resistant water-cooled capacitor outlet bushing described in the present invention;

[0030] Figure 14 This is an exploded view of the flange tube in the multi-layer sealed, heat-expansion-resistant water-cooled capacitor outlet bushing described in the utility model;

[0031] In the picture:

[0032] 1-conductive rod; 11-air side; 12-hydrogen side; 13-conductive rod sealing groove; 14-milling groove;

[0033] 111-airtightness test air inlet; 112-airtightness test air outlet; 131-second sealing ring; 141-end screen shrapnel;

[0034] 2-capacitor bushing; 21-grounding hole; 22-capacitor bushing opening;

[0035] 3-epoxy sleeve; 31-pressure ring; 32-O-ring; 33-sealing gasket;

[0036] 4-spring mechanism; 41-sealing plate; 42-first sealing ring; 43-spring plate; 44-washer; 45-connecting plate; 46-connecting screw; 47-spring; 431-through hole;

[0037] 5-flange pipe; 51-air side flange; 52-flange sleeve; 53-hydrogen side flange; 54-cork rubber pad;

[0038] 531-end screen hole; 532-flange pipe sealing groove; 5321-third sealing ring. DETAILED DESCRIPTION

[0039] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0040] Example 1

[0041] In this embodiment, Figure 1The utility model discloses a multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing, comprising a conductive rod 1, a capacitor bushing 2, an epoxy bushing 3, a spring mechanism 4 and a flange tube 5; the two ends of the conductive rod 1 are respectively an air side 11 and a hydrogen side 12; the capacitor bushing 2 is sleeved on the outside of the conductive rod 1; the epoxy bushing 3 is sleeved on one end of the capacitor bushing 2 close to the air side 11 of the conductive rod 1; the end of the epoxy bushing 3 away from the air side 11 of the conductive rod 1 is provided with a pressure ring 31; the spring mechanism 4 is provided on the conductive rod 1, and is located between the port of the capacitor bushing 2 and the epoxy bushing 3, for ensuring the sealing of the conductive rod 1 after thermal expansion; the flange tube 5 is sleeved on the outside of the capacitor bushing 2, and one end is connected to the epoxy bushing 3 through a pressure ring 31.

[0042] In this embodiment, Figure 1 The spring mechanism 4 includes a sealing plate 41, a group of first sealing rings 42, a spring plate 43, a group of washers 44, a connecting plate 45 and a group of connecting screws 46; the sealing plate 41 is arranged at one end of the capacitor bushing 2 close to the empty side 11 of the conductive rod 1, and a first sealing ring 42 is provided between the two for sealing; the spring plate 43 is arranged on the side of the sealing plate 41 close to the empty side 11 of the conductive rod 1, and a washer 44 is provided between the sealing plate 41; a first sealing ring 42 is provided between the washer 44 and the sealing plate 41 for sealing; the connecting plate 45 is arranged on the side of the spring plate 43 close to the empty side 11 of the conductive rod 1, and a washer 44 is provided between the spring plate 43; connecting screws 46 are provided on the circumferential surface of the connecting plate 45; the connecting plate 45 is connected to the conductive rod 1 through the connecting screws 46.

[0043] In this embodiment, Figure 1 The spring plate 43 is annular and has a plurality of through holes 431 on its end surface; the spring mechanism 4 further includes a plurality of springs 47 , which are disposed in the through holes 431 .

[0044] Specifically, the installed length of the spring 47 is 19 mm and the effective length is 22 mm.

[0045] Example 2

[0046] On the basis of Example 1, in this embodiment, as Figure 1 and Figure 2 The utility model discloses a multi-layer sealed anti-thermal expansion water-cooled capacitor outlet bushing, wherein the conductive rod 1 is provided with a plurality of conductive rod sealing grooves 13 at the two ends near the capacitor bushing 2 and at the end of the epoxy bushing 3 near the air side 11; a second sealing ring 131 is provided in the conductive rod sealing groove 13 for assembly sealing.

[0047] In particular, a stopper is added to the conductive rod 1 to prevent the conductive rod 1 from axial movement; an O-ring, a nut, and an O-ring are placed on both sides of the stopper of the conductive rod 1 and coated with TITE-SEAL sealant to seal and fix them.

[0048] In this embodiment, if Figure 1 and Figure 2 Two milling grooves 14 are provided on the circumference of the hydrogen side 12 of the conductive rod 1; an end screen spring piece 141 is provided in the milling groove 14; an airtight test air inlet hole 111 is provided on the air side 11 of the conductive rod 1; an airtight test air outlet hole 112 is provided next to the conductive rod sealing groove 13 of the air side 11 of the conductive rod 1.

[0049] Specifically, the airtight test air inlet 111 and the airtight test air outlet 112 are used for the airtight test after assembly is completed; after the airtight test is passed, the airtight test air inlet 111 is locked using an M10 bolt coated with high-strength thread locking anaerobic adhesive SF1510.

[0050] In this embodiment, if Figure 1 and Figure 2 A grounding hole 21 is provided on the circumferential surface of the capacitor bushing 2 near the hydrogen side 12 of the conductive rod 1; a capacitor bushing opening 22 is provided at one end of the capacitor bushing 2 near the hydrogen side 12 of the conductive rod 1.

[0051] In particular, the inner wall of the capacitor sleeve 2 is bonded to the conductive rod 1 with a black rubber pad, and aluminum foil is used as a lead of the end screen spring 141.

[0052] In this embodiment, if Figure 1 and Figure 2 The flange pipe 5 includes an air side flange 51, a flange sleeve 52 and a hydrogen side flange 53; the air side flange 51 is connected to one end of the epoxy sleeve 3 through a pressure ring 31; the air side flange 51 is welded to the flange sleeve 52; the flange sleeve 52 is welded to the hydrogen side flange 53; a group of end screen holes 531 are provided on the circumference of the hydrogen side flange 53; the end screen holes 531 are located outside the grounding hole 21 and have the same diameter as the grounding hole 21; a group of flange pipe sealing grooves 532 are provided inside the hydrogen side flange 53; a third sealing ring 5321 is provided in the flange pipe sealing groove 532 for assembly and sealing.

[0053] In particular, the flange pipe 5 is made of stainless steel; the pressing ring 31 is made of stainless steel; and the pressing ring 31 is connected to the air side flange 51 via M8X30 stainless steel bolts.

[0054] Specifically, a set screw hole is opened on the side of the air side flange 51, and a set screw is selected to connect it to the capacitor bushing 2; a 4-M6 flat-end set screw is screwed into the end screen hole 531 of the hydrogen side flange 52 for grounding.

[0055] In this embodiment, if Figure 1 and Figure 2 An O-ring 32 and a sealing gasket 33 are provided between the epoxy sleeve 3 and the air side flange 51 for sealing.

[0056] In this embodiment, if Figure 1 and Figure 2 A cork rubber pad 54 is provided between the capacitor sleeve 2 and the flange sleeve 52 to fill the gap between the two.

[0057] Specifically, the cork rubber pad 54 is wound around the capacitor bushing 2 .

[0058] In particular, the space between the capacitor bushing 2 and the flange bushing 52 is filled with epoxy resin.

[0059] The working principle of the above embodiment is:

[0060] The utility model discloses a multi-layer sealed heat-expansion-resistant water-cooled capacitor outlet bushing. When the conductive rod 1 expands due to heat, the spring 47 in the spring mechanism 4 provides a stretching space for the expansion of the conductive rod 1. At the same time, the sealing plate 41 and the first sealing ring 42 in the spring mechanism 4 cooperate with the gasket 44 to ensure the sealing of the mechanism; a second sealing ring 131 is provided in the conductive rod sealing groove 13 on the conductive rod 1 to ensure the sealed assembly of the conductive rod 1 and the capacitor bushing 2 and the epoxy bushing 3; a third sealing ring 5321 is provided in the flange tube sealing groove 532 of the hydrogen side flange 53 to ensure the sealed assembly of the capacitor bushing 2 and the flange tube 5; an O-ring 32 and a sealing gasket 33 are provided between the epoxy bushing 3 and the air side flange 51 to ensure the sealed assembly of the two.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as within the scope of protection of the present invention.

Claims

1. A multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing, characterized by: include: A conductive rod (1), wherein two ends of the conductive rod (1) are respectively an air side (11) and a hydrogen side (12); A capacitor sleeve (2), wherein the capacitor sleeve (2) is sleeved outside the conductive rod (1); An epoxy sleeve (3) is sleeved on one end of the capacitor sleeve (2) close to the air side (11) of the conductive rod (1); a pressing ring (31) is provided on one end of the epoxy sleeve (3) away from the air side (11) of the conductive rod (1); A spring mechanism (4), the spring mechanism (4) being provided on the conductive rod (1) and located between the end of the capacitor sleeve (2) and the epoxy sleeve (3), and being used to ensure the sealing performance of the conductive rod (1) after thermal expansion; A flange tube (5) is sleeved on the outside of the capacitor sleeve (2), and one end of the flange tube (5) is connected to the epoxy sleeve (3) via a pressing ring (31).

2. The multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to claim 1, characterized in that: The spring mechanism (4) comprises a sealing plate (41), a set of first sealing rings (42), a spring plate (43), a set of washers (44), a connecting plate (45) and a set of connecting screws (46); The sealing plate (41) is provided at one end of the capacitor bushing (2) near the empty side (11) of the conductive rod (1), and a first sealing ring (42) is provided between the two for sealing; the spring plate (43) is provided at one side of the sealing plate (41) near the empty side (11) of the conductive rod (1), and a gasket (44) is provided between the sealing plate (41); a first sealing ring (42) is provided between the gasket (44) and the sealing plate (41) for sealing; the connecting plate (45) is provided at one side of the spring plate (43) near the empty side (11) of the conductive rod (1), and a gasket (44) is provided between the spring plate (43); a connecting screw (46) is provided on the circumference of the connecting plate (45); the connecting plate (45) is connected to the conductive rod (1) via the connecting screw (46).

3. The multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to claim 2, characterized in that: The spring plate (43) is annular and has a plurality of through holes (431) on its end surface; the spring mechanism (4) further comprises a plurality of springs (47), and the springs (47) are arranged in the through holes (431).

4. The multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to claim 1, characterized in that: The conductive rod (1) is provided with a plurality of conductive rod sealing grooves (13) at the two ends of the capacitor sleeve (2) and at the end of the epoxy sleeve (3) near the air side (11); a second sealing ring (131) is provided in the conductive rod sealing groove (13) for assembly and sealing.

5. The multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to claim 4, characterized in that: Two milling slots (14) are provided on the circumference of the hydrogen-proximal side (12) of the conductive rod (1); an end screen shrapnel (141) is provided in the milling slot (14); an airtightness test air inlet (111) is provided on the air side (11) of the conductive rod (1); and an airtightness test air outlet (112) is provided beside the conductive rod sealing groove (13) on the air-proximal side (11) of the conductive rod (1).

6. The multi-layer sealed, thermal expansion resistant, water-cooled capacitor outlet bushing according to claim 1, characterized in that: A grounding hole (21) is provided on the peripheral surface of the capacitor bushing (2) near the hydrogen side (12) of the conductive rod (1); and a capacitor bushing opening (22) is provided at one end of the capacitor bushing (2) near the hydrogen side (12) of the conductive rod (1).

7. The multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to claim 6, characterized in that: The flange pipe (5) includes an air side flange (51), a flange sleeve (52) and a hydrogen side flange (53); The air side flange (51) is connected to one end of the epoxy sleeve (3) through a pressure ring (31); the air side flange (51) is welded to the flange sleeve (52); the flange sleeve (52) is welded to the hydrogen side flange (53); a group of end screen holes (531) are provided on the circumference of the hydrogen side flange (53); the end screen holes (531) are located outside the grounding hole (21) and have the same diameter as the grounding hole (21); a group of flange pipe sealing grooves (532) are provided inside the hydrogen side flange (53); a third sealing ring (5321) is provided in the flange pipe sealing groove (532) for assembly sealing.

8. The multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to claim 7, characterized in that: An O-ring (32) and a sealing gasket (33) are provided between the epoxy sleeve (3) and the air side flange (51) for sealing.

9. The multi-layer sealed, heat-expansion-resistant, water-cooled capacitor outlet bushing according to claim 7, characterized in that: A cork rubber pad (54) is provided between the capacitor sleeve (2) and the flange sleeve (52) to fill the gap therebetween.

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