Split type RH furnace vacuum pump structure

Abstract

The utility model discloses a split type RH furnace vacuum pump structure which comprises a pump body bent pipe, a vacuum pump contraction section, a vacuum pump throat, a vacuum pump expansion section, a positioning sleeve and a nozzle, the pump body bent pipe, the vacuum pump contraction section, the vacuum pump throat and the vacuum pump expansion section are sequentially connected, and the positioning sleeve is fixedly arranged on the pump body bent pipe in a penetrating mode. The positioning sleeve faces the vacuum pump and is located on the same center line with the vacuum pump contraction section and the vacuum pump expansion section, a sleeve flange is installed at the end, located outside the pump body bent pipe, of the positioning sleeve, the nozzle is provided with a nozzle flange, and the nozzle flange is in flange connection with the sleeve flange, so that the nozzle penetrates through the positioning sleeve and is centered. According to the scheme, mounting of the nozzle is achieved through flange connection, the requirement for convenient dismounting and mounting is met, the working efficiency of dismounting and mounting of the nozzle is improved, the construction efficiency of maintenance and replacement in regular overhaul is improved, leakage points at the position of the nozzle are reduced, the vacuumizing performance of a vacuum pump is guaranteed, and the operation rate of a vacuum system is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical refining, in particular to a split type RH furnace vacuum pump structure. Background Art

[0002] RH vacuum pumps need to be disassembled and maintained regularly during production and use. The traditional pump body and nozzle are connected by a clamping type. This connection type not only has poor sealing effect and is prone to leakage during production and use, but also has cumbersome disassembly steps. Disassembly also requires the use of tools such as jacks, which seriously affects the normal production rhythm. Utility Model Content

[0003] In order to solve the above problems, the present application provides a split RH furnace vacuum pump structure.

[0004] The present application provides a split RH furnace vacuum pump structure, including a pump body bent pipe, a vacuum pump contraction section, a vacuum pump throat, a vacuum pump expansion section, a positioning sleeve and a nozzle. The pump body bent pipe, the vacuum pump contraction section, the vacuum pump throat and the vacuum pump expansion section are connected in sequence. The positioning sleeve is fixedly inserted into the pump body bent pipe. The positioning sleeve faces the vacuum pump direction and is on a center line with the vacuum pump contraction section and the vacuum pump expansion section. A sleeve flange is installed at one end of the positioning sleeve located outside the pump body bent pipe. The nozzle is installed with a nozzle flange. The nozzle flange is flange-connected to the sleeve flange, so that the nozzle is inserted into the positioning sleeve and is aligned.

[0005] In some embodiments, the pump body elbow and the vacuum pump contraction section are connected by a flange, the vacuum pump contraction section and the vacuum pump throat are welded, and the vacuum pump throat and the vacuum pump expansion section are connected by a flange.

[0006] In some embodiments, the split RH furnace vacuum pump structure further includes a vacuum pump support, and the vacuum pump support is welded to the vacuum pump expansion section.

[0007] In some embodiments, the positioning sleeve is a prefabricated steel pipe, and the positioning sleeve is welded to the elbow of the pump body.

[0008] In some embodiments, a manhole structure is welded to the pump body elbow, and the manhole structure is a prefabricated steel part.

[0009] In some embodiments, the manhole diameter of the manhole structure is not less than 800 mm.

[0010] In some embodiments, the pump body elbow is a prefabricated steel structure, and the center lines of both ends of the pump body elbow are perpendicular to each other.

[0011] In some embodiments, the split RH furnace vacuum pump structure further includes a steam trap, which is fixedly mounted on the pump body elbow and communicates with the positioning sleeve through a steam trap pipe.

[0012] In some embodiments, the nozzle flange and the sleeve flange are sealed with a metal graphite gasket.

[0013] In some embodiments, the flange connection between the pump body elbow and the vacuum pump contraction section, and the flange connection between the vacuum pump throat and the vacuum pump expansion section are both sealed with metal graphite gaskets.

[0014] The beneficial effects of the present application are as follows: a split RH furnace vacuum pump structure is provided, including a pump body bend, a vacuum pump contraction section, a vacuum pump throat and a vacuum pump expansion section connected in sequence, and also including a positioning sleeve and a nozzle, the positioning sleeve is fixedly inserted into the pump body bend, the positioning sleeve faces the vacuum pump direction and is on the same center line as the vacuum pump contraction section and the vacuum pump expansion section, a sleeve flange is installed at one end of the positioning sleeve located outside the pump body bend, and a nozzle flange is installed on the nozzle, and the nozzle flange is flange-connected to the sleeve flange, so that the nozzle is inserted into the positioning sleeve and aligned, and thus the nozzle is on the same center line as the vacuum pump contraction section and the vacuum pump expansion section; the present scheme realizes the installation of the nozzle by a detachable flange connection, meets the requirements of convenient disassembly and installation, improves the work efficiency of nozzle disassembly and installation, improves the construction efficiency of maintenance and replacement during regular inspections, reduces leakage points at the nozzle position, ensures the vacuum pumping performance, and significantly improves the operation rate of the vacuum system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model.

[0016] Figure 1 A schematic structural diagram of a split RH furnace vacuum pump structure provided in this application.

[0017] The attached drawings are marked with: 1-nozzle, 2-positioning sleeve, 3-nozzle flange, 4-drainer, 5-pump body elbow, 6-manhole structure, 7-pump body elbow flange, 8-throat flange, 9-vacuum pump contraction section, 10-vacuum pump throat, 11-vacuum pump expansion section, 12-vacuum pump support. DETAILED DESCRIPTION

[0018] This embodiment discloses a split RH furnace vacuum pump structure, please refer to Figure 1 The structure includes a pump body elbow 5, a vacuum pump contraction section 9, a vacuum pump throat 10, a vacuum pump expansion section 11, a positioning sleeve 2 and a nozzle 1. The pump body elbow 5, the vacuum pump contraction section 9, the vacuum pump throat 10 and the vacuum pump expansion section 11 are connected in sequence.

[0019] like Figure 1As shown, the positioning sleeve 2 is fixedly installed in the pump body elbow 5, and the positioning sleeve 2 is partially installed outside the pump body elbow 5 and partially installed inside the pump body elbow 5, and the installation direction of the positioning sleeve 2 is limited, the positioning sleeve 2 faces the vacuum pump direction, and the positioning sleeve 2 is on the same center line as the vacuum pump contraction section 9 and the vacuum pump expansion section 11. By installing a sleeve flange at one end of the positioning sleeve 2 located outside the pump body elbow 5, the sleeve flange is used for installing the nozzle 1.

[0020] like Figure 1 As shown, a nozzle flange 3 is installed on the nozzle 1, and a flange connection is made between the nozzle flange 3 and the sleeve flange, thereby achieving the purpose of installing the nozzle 1 in the positioning sleeve 2. Specifically, the nozzle 1 is inserted into the positioning sleeve 2, and the nozzle 1 and the positioning sleeve 2 are automatically aligned, so that the nozzle 1 and the vacuum pump contraction section 9 and the vacuum pump expansion section 11 are on the same center line, meeting the installation requirements of the nozzle 1 in the vacuum pump.

[0021] This solution realizes the installation of the nozzle 1 through a detachable flange connection, meets the requirements of convenient disassembly and installation, improves the work efficiency of disassembly and installation of the nozzle 1, improves the construction efficiency of maintenance and replacement during regular inspections, reduces the leakage points at the position of the nozzle 1, ensures the vacuum performance of the vacuum pump, and significantly improves the operation rate of the vacuum system.

[0022] The inventors also found that the RH vacuum pump needs to be disassembled and maintained regularly during production and use. However, during the disassembly of the vacuum pump, since the vacuum pump body is generally an integrally welded type, when it is disassembled and replaced, the overall height and width of the vacuum pump are large, and the on-site operating conditions for overall replacement cannot be provided.

[0023] In order to solve the above problems, in some embodiments, please refer to Figure 1 The pump body elbow 5 and the vacuum pump contraction section 9 are connected by flanges. The flange connection position is specifically referred to Figure 1 The pump body elbow flange 7 is located in the middle; the vacuum pump contraction section 9 and the vacuum pump throat 10 are welded; the vacuum pump throat 10 and the vacuum pump expansion section 11 are connected by flanges. The specific flange connection position is as follows Figure 1 The beneficial effect is that by changing the connection mode of each part of the vacuum pump to a split flange connection, the shortcomings of the integral vacuum pump such as cumbersome steps and long time consumption during disassembly and installation are solved, the work efficiency of pump body disassembly and installation is improved, the construction efficiency of maintenance and replacement during regular inspection is improved, and the operation rate of the vacuum system is significantly improved.

[0024] In some embodiments, see Figure 1 The split RH furnace vacuum pump structure also includes a vacuum pump support 12, which is welded on the vacuum pump expansion section 11 to support the overall vacuum pump structure.

[0025] In some embodiments, the vacuum pump support 12 is a prefabricated steel structure.

[0026] In some embodiments, the positioning sleeve 2 is a prefabricated steel pipe, and the positioning sleeve 2 is welded to the pump body elbow 5 .

[0027] In some embodiments, the nozzle 1 is a prefabricated welded part.

[0028] In some embodiments, a manhole structure 6 is welded to the pump body elbow 5, the manhole structure 6 is a steel prefabricated part, and the manhole diameter of the manhole structure 6 should not be less than 800 mm.

[0029] In some embodiments, the pump body elbow 5 is a prefabricated steel structure. Figure 1 The two ends of the opening of the pump body elbow 5 respectively have their own center lines, which limit the center lines at the two ends to be perpendicular to each other.

[0030] In some embodiments, the vacuum pump contraction section 9 is a steel structure welded part, and its two ends are connected to the pump body elbow 5 and the vacuum pump throat 10.

[0031] In some embodiments, the vacuum pump throat 10 is a steel structure welded part with equal diameter, and its two ends are connected to the vacuum pump contraction section 9 and the vacuum pump expansion section 11 .

[0032] In some embodiments, the vacuum pump expansion section 11 is a steel structure welded part, and a small-diameter end of the vacuum pump expansion section 11 is connected to the flange 8 of the vacuum pump throat 10 .

[0033] In some embodiments, see Figure 1 The split RH furnace vacuum pump structure also includes a steam trap 4, which is fixedly mounted on the pump body elbow 5. The steam trap 4 is connected to the positioning sleeve 2 through a steam trap pipe, and plays a role in draining water from the positioning sleeve 2.

[0034] In some embodiments, the steam trap 4 is a prefabricated steel pipe structure, which is welded to the pump body elbow 5.

[0035] In some embodiments, the nozzle flange 3 and the sleeve flange are sealed with a metal graphite gasket.

[0036] In some embodiments, the flange connection between the pump body elbow 5 and the vacuum pump contraction section 9, and the flange connection between the vacuum pump throat 10 and the vacuum pump expansion section 11 are sealed with metal graphite gaskets to ensure good sealing of the flange connections.

[0037] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0038] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A split RH furnace vacuum pump structure, characterized in that: include: A pump body elbow, a vacuum pump contraction section, a vacuum pump throat and a vacuum pump expansion section, wherein the pump body elbow, the vacuum pump contraction section, the vacuum pump throat and the vacuum pump expansion section are connected in sequence; A positioning sleeve, the positioning sleeve is fixedly inserted into the pump body elbow, the positioning sleeve faces the vacuum pump and is on a central line with the vacuum pump contraction section and the vacuum pump expansion section, and a sleeve flange is installed at one end of the positioning sleeve located outside the pump body elbow; The nozzle is provided with a nozzle flange, and the nozzle flange is flange-connected with the sleeve flange so that the nozzle is passed through the positioning sleeve and is aligned.

2. The split RH furnace vacuum pump structure according to claim 1, characterized in that: The pump body bent pipe and the vacuum pump contraction section are connected via a flange, the vacuum pump contraction section and the vacuum pump throat are welded, and the vacuum pump throat and the vacuum pump expansion section are connected via a flange.

3. The split RH furnace vacuum pump structure according to claim 2, characterized in that: The split RH furnace vacuum pump structure further includes a vacuum pump support, and the vacuum pump support is welded to the vacuum pump expansion section.

4. The split RH furnace vacuum pump structure according to claim 1 or 2, characterized in that: The positioning sleeve is a prefabricated steel pipe part, and the positioning sleeve is welded on the pump body elbow.

5. The split RH furnace vacuum pump structure according to claim 1, characterized in that: A manhole structure is welded on the pump body elbow, and the manhole structure is a steel prefabricated part.

6. The split RH furnace vacuum pump structure according to claim 5, characterized in that: The manhole diameter of the manhole structure is not less than 800 mm.

7. The split RH furnace vacuum pump structure according to claim 2, characterized in that: The pump body bent pipe is a prefabricated steel structure component, and the center lines at both ends of the pump body bent pipe are perpendicular to each other.

8. The split RH furnace vacuum pump structure according to claim 1 or 2, characterized in that: The split RH furnace vacuum pump structure further comprises a steam trap, which is fixedly mounted on the pump body elbow and communicated with the positioning sleeve via a steam trap pipe.

9. The split RH furnace vacuum pump structure according to claim 1, characterized in that: The nozzle flange and the sleeve flange are sealed by using metal graphite gaskets.

10. The split RH furnace vacuum pump structure according to claim 2, characterized in that: The flange connection between the pump body elbow and the vacuum pump contraction section, and the flange connection between the vacuum pump throat and the vacuum pump expansion section are all sealed with metal graphite gaskets.

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