Novel reverse flange for improving mixed-flow pump

Abstract

The utility model discloses a novel counter flange for improving a mixed-flow pump, which comprises a counter flange body, a blind flange is arranged on one side of the counter flange body, and a barrel is jointly mounted on the inner side of the blind flange and the inner side of the counter flange body. Lifting screw holes are formed in connecting protruding blocks arranged on the outer side of the blind flange and the outer side of the counter flange body respectively. The novel counter flange has the advantages that the counter flange body, the barrel and the blind flange are adopted as the main body structure of the novel counter flange, so that when the novel counter flange is used, deviation between a pump outlet and the front and the back of a pipeline can be eliminated through translation of the blind flange on the pipeline, and it is guaranteed that the pump outlet and the pipeline are in one-time butt joint successfully; therefore, the extension of an arch in the transformation of the mixed-flow pump is avoided, and the transformation cost of the mixed-flow pump is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flange for the transformation of mixed-flow pumps, and particularly relates to a new type of reverse flange for the transformation of mixed-flow pumps. Background Art

[0002] With the continuous improvement of China's manufacturing level, the continuous optimization of materials, and the increase in the operation years of the circulating pump, the transformation projects of mixed-flow pumps are increasing day by day. Usually, users will carry out technical transformations in aspects such as efficiency improvement, capacity expansion, desulfurization, water level or working condition changes, structural improvement, and material upgrade.

[0003] At present, during the connection process between the pump outlet and the pipeline after transformation, there are often deviations (even occurring simultaneously) in the vertical or horizontal directions between the pump discharge flange and the pipeline flange, resulting in the inability to smoothly install the pump unit and an extended construction period. Most transformation projects need to be completed within the specified maintenance period in autumn and winter, usually within two weeks, with a short cycle, increasing the transformation cost of the mixed-flow pump. Content of the Utility Model

[0004] (1) Technical Problem to be Solved

[0005] The technical problem to be solved by the utility model is to provide a new type of reverse flange for the transformation of mixed-flow pumps that can avoid the docking deviation between the pump discharge flange and the pipeline flange according to the current situation of the existing technology.

[0006] (2) Technical Solution

[0007] The utility model is realized through the following technical solutions: The utility model provides a new type of reverse flange for the transformation of mixed-flow pumps, which includes a reverse flange body. A blind flange is arranged on one side of the reverse flange body. A cylinder is jointly installed inside the blind flange and the reverse flange body. Lifting screw holes are respectively opened on the connection bumps on the outer sides of the blind flange and the reverse flange body.

[0008] Furthermore, the reverse flange body is welded to the cylinder.

[0009] By adopting the above technical solutions, the reverse flange body is of a two-end flange type. The end connected to the pump is a fixed end, which is welded in the factory; the end connected to the pipeline is a movable end, which is welded on-site.

[0010] Furthermore, the outer diameter of the blind flange must not interfere with the free expansion and contraction of the bolts at the pump end, and the inner diameter of the blind flange is slightly smaller than the inner diameter of the pipeline.

[0011] By adopting the above technical solutions, the reliable installation and fixation of the pump and the new type of reverse flange can be ensured.

[0012] Furthermore, the blind flange has a free telescopic structure, and the blind flange is connected to the cylinder by on-site welding.

[0013] By adopting the above technical solution, the blind flange can be translated on the pipeline, which can eliminate the deviation between the pump outlet and the front and back of the pipeline, and ensure that the pump outlet and the pipeline are successfully connected in one time.

[0014] Furthermore, the lifting screw holes are respectively formed on the counter flange body and the connecting protrusions provided on the blind flange.

[0015] By adopting the above technical solution, the lifting screw hole is mainly connected to the external lifting ring to facilitate the convenient lifting of the new counter flange after installation, ensuring the reliable connection between the pump outlet and the external pipeline.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] In order to solve the problem that in the process of connecting the pump outlet with the pipeline after the current transformation, there is often an up-down or left-right deviation between the pump discharge flange and the pipeline flange (even occurring at the same time), which makes it impossible to install the pump unit smoothly and prolongs the construction period. Most of the transformation projects need to be replaced within the prescribed maintenance period in the autumn and winter seasons, which usually needs to be completed within two weeks, and the cycle is short, which increases the transformation cost of the mixed flow pump. The utility model adopts a counter-flange body, a cylinder body and a blind flange as the main structure of the new type of discharge flange, so that the new type of counter-flange can eliminate the deviation between the pump outlet and the front and back of the pipeline through the translation of the blind flange on the pipeline when in use, thereby ensuring that the pump outlet and the pipeline are successfully connected at one time, thereby avoiding the extension of the mixed flow pump transformation arch and reducing the transformation cost of the mixing pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a new type of counter flange used for mixed flow pump modification described in the utility model.

[0020] The following are the descriptions of the reference numerals:

[0021] 1. Counter flange body; 2. Cylinder body; 3. Blind flange; 4. Lifting screw hole. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] like Figure 1As shown, a new type of anti-flange for mixed flow pump modification in this embodiment includes an anti-flange body 1, a blind flange 3 is arranged on one side of the anti-flange body 1, the anti-flange body 1 is a two-end flange type, one end connected to the pump is a fixed end, which is welded in the factory; the end connected to the pipeline is a movable end, which is welded on site, and a cylinder 2 is installed together on the inner side of the blind flange 3 and the anti-flange body 1, and the blind flange 3 and the connecting protrusions on the outer side of the anti-flange body 1 are respectively provided with lifting screw holes 4, and the blind flange 3 has a free telescopic structure, and the blind flange 3 is connected to the cylinder 2 by on-site welding, so that the blind flange 3 can be translated on the pipeline, which can eliminate the deviation between the pump outlet and the front and back of the pipeline, and ensure that the pump outlet and the pipeline are successfully docked at one time.

[0024] like Figure 1 As shown, in this embodiment, the counter-flange body 1 is welded to the cylinder 2, the outer diameter of the blind flange 3 must not interfere with the free expansion and contraction of the pump end bolts, and the inner diameter of the blind flange 3 is slightly smaller than the inner diameter of the pipeline, which can ensure the reliable installation and fixation of the pump and the new counter-flange.

[0025] like Figure 1 As shown, in this embodiment, the lifting screw holes 4 are respectively formed on the connecting protrusions on the counter-flange body 1 and the blind flange 3. The lifting screw holes 4 are mainly connected to the external lifting rings to facilitate the convenient lifting of the new counter-flange after installation and ensure the reliable connection between the pump outlet and the external pipeline.

[0026] The specific implementation process of this embodiment is as follows: the new counter-flange is a two-end flange type, one end of the counter-flange body 1 connected to the pump is a fixed end, which is welded in the factory; one end of the blind flange 3 connected to the pipeline is a movable end, which is welded on site, and the outer diameter of the blind flange 3 must not interfere with the free expansion and contraction of the pump end bolts, and the inner diameter is slightly smaller than the inner diameter of the pipeline. After the new counter-flange is installed, it can be put into use. During use, the deviation between the pump outlet and the front and rear of the pipeline is eliminated by the translation of the blind flange 3 on the pipeline, ensuring that the pump outlet and the pipeline are successfully docked at one time, thereby avoiding the extension of the arch of the mixed flow pump transformation and reducing the transformation cost of the mixing pump.

[0027] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be 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. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel reverse flange for the transformation of a mixed-flow pump, characterized in that: It includes a reverse flange body (1), on one side of the reverse flange body (1), a blind flange (3) is arranged, and a cylinder body (2) is jointly installed inside the blind flange (3) and the reverse flange body (1). Hoisting screw holes (4) are respectively formed on the connection bumps on the outer sides of the blind flange (3) and the reverse flange body (1).

2. The novel counter flange for the retrofit of a mixed-flow pump according to claim 1, characterized in that: The reverse flange body (1) is welded to the cylinder body (2).

3. A novel reverse flange for the retrofit of a mixed-flow pump according to claim 2, characterized in that: The outer diameter of the blind flange (3) must not interfere with the free expansion and contraction of the pump end bolts, and the inner diameter of the blind flange (3) is slightly smaller than the inner diameter of the pipeline.

4. A novel reverse flange for the retrofit of a mixed-flow pump according to claim 1, characterized in that: The blind flange (3) has a free expansion and contraction structure, and the blind flange (3) is connected to the cylinder body (2) by on-site welding.

5. A novel reverse flange for the transformation of a mixed-flow pump according to claim 1, characterized in that: The hoisting screw holes (4) are respectively formed on the connection bumps on the reverse flange body (1) and the blind flange (3).

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