Centrifugal pump warming-up structure
By introducing four warm-up pipes and four valves into the centrifugal pump, and using the pressure of the outlet main pipe to drive the flow of the medium, the problem of frequent opening and closing of the check valve and backflow of the medium in the existing warm-up method is solved, realizing rapid warm-up of the standby pump and low-cost retrofit.
Patent Information
- Application Number
- CN202520041610.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-01-08
AI Technical Summary
Existing methods for warming up centrifugal pumps suffer from problems such as frequent opening and closing of check valves or backflow of media impacting the impeller, which shortens the service life of standby pumps. Furthermore, existing methods are costly to modify or have complex structures.
The system employs a structure with four warm pipes and four valves to direct the medium from the outlet main pipe to the inlet of the standby pump. The medium flow is driven by the pressure in the outlet main pipe, avoiding frequent opening and closing of the check valve and backflow of the medium. The structure is simple and the modification cost is low.
It achieves rapid warm-up of the standby pump, avoids damage to the check valve and media impact, and has low modification cost and simple structure.
Smart Images
Figure CN223908485U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to centrifugal pump technical field, concretely is a centrifugal pump warm pump structure. BACKGROUND
[0002] In the chemical industry, centrifugal pump is the commonly used power equipment of medium delivery, in order to ensure medium delivery, usually centrifugal pump has standby pump, prevents the influence production progress when using pump failure. When standby pump does not carry out warm pump, need to close the import hand valve and export hand valve of standby pump, then empty the medium in standby pump, otherwise, when winter temperature is low, the medium in standby pump is easy to solidify, easily leads to standby pump failure. In actual chemical production, for making standby pump can be quickly put into use, standby pump generally all need to carry out warm pump. The existing warm pump method one: standby pump adopts frequency conversion control, low frequency makes standby pump run, and there is a small amount of medium circulation in standby pump, so that standby pump can be quickly put into use when starting to put into production, but the low flow in standby pump makes the check valve at the outlet of standby pump be in the state of frequent opening and closing, greatly reduces the service life of check valve, the existing warm pump method two: the import hand valve and export hand valve of standby pump are slightly opened and cancel the check valve at the outlet of standby pump, because the pump starts to make the export header pressure greater than the import header pressure, in turn makes the medium from the export hand valve of standby pump reverse circulation to the import of standby pump, this operation can make standby pump be in the warm pump state, but the reverse flow medium can cause the impact of impeller of standby pump, reduces the service life of standby pump. SUMMARY
[0003] The utility model discloses in order to solve the problem that the existing warm pump method has above-mentioned defect, provide a new centrifugal pump warm pump structure.
[0004] The utility model discloses the following technical scheme is adopted and realizes:
[0005] The centrifugal pump warm pump structure comprises a first centrifugal pump, a second centrifugal pump, a first inlet warm pipe, a first outlet warm pipe, a second inlet warm pipe and a second outlet warm pipe, the outlet of the first centrifugal pump is provided with a first outlet pipe, the first outlet pipe is provided with a first outlet hand valve and a first check valve, the first outlet pipe is communicated with an outlet header, the inlet of the first centrifugal pump is provided with a first inlet pipe, the first inlet pipe is provided with a first inlet hand valve, the first inlet pipe is communicated with an inlet header, one end of the first inlet warm pipe is communicated with the outlet header, the other end of the first inlet warm pipe is communicated with the inlet of the first centrifugal pump, the first inlet warm pipe is provided with a first inlet warm pipe hand valve, one end of the first outlet warm pipe is communicated with the outlet of the first centrifugal pump, the other end of the first outlet warm pipe is communicated with the inlet header, the first outlet warm pipe is provided with a first outlet warm pipe hand valve, the outlet of the second centrifugal pump is provided with a second outlet pipe, the second outlet pipe is provided with a second outlet hand valve and a second check valve, the second outlet pipe is communicated with the outlet header, the inlet of the second centrifugal pump is provided with a second inlet pipe, the second inlet pipe is provided with a second inlet hand valve, the second inlet pipe is communicated with the inlet header, one end of the second inlet warm pipe is communicated with the outlet header, the other end of the second inlet warm pipe is communicated with the inlet of the second centrifugal pump, the second inlet warm pipe is provided with a second inlet warm pipe hand valve, one end of the second outlet warm pipe is communicated with the outlet of the second centrifugal pump, the other end of the second outlet warm pipe is communicated with the inlet header, the second outlet warm pipe is provided with a second outlet warm pipe hand valve, the inner diameters of the first inlet warm pipe, the first outlet warm pipe, the second inlet warm pipe and the second outlet warm pipe are smaller than the inner diameter of the outlet header.
[0006] Working principle: assuming that the first centrifugal pump is a service pump and the second centrifugal pump is a standby pump, the first inlet hand valve and the first outlet hand valve are opened, the first inlet warm pipe hand valve and the first outlet warm pipe hand valve are closed, the second inlet hand valve and the second outlet hand valve are closed, the second inlet warm pipe hand valve and the second outlet warm pipe hand valve are opened, the first centrifugal pump is started, the pressure of the outlet header is greater than the pressure of the inlet header, a small part of medium in the outlet header flows to the inlet of the second centrifugal pump through the second inlet warm pipe hand valve, then flows to the outlet of the second centrifugal pump through the second centrifugal pump, and finally flows to the inlet header through the second outlet warm pipe hand valve, so it can be seen that the second centrifugal pump still has medium flowing therethrough in the warm pump state when the first centrifugal pump is in use. When the second centrifugal pump is converted from a standby pump to a service pump, the second inlet hand valve and the second outlet hand valve are opened, so that the second centrifugal pump can be started immediately and put into use immediately.
[0007] Further, the inner diameters of the first inlet warm pipe, the first outlet warm pipe, the second inlet warm pipe and the second outlet warm pipe are equal to 1 / 10 of the inner diameter of the outlet header, so that a small flow of medium can flow when the standby pump is in the warm pump state.
[0008] The utility model discloses a beneficial effect as follows: the utility model discloses utilize the feature that the export header pressure is greater than the import header pressure, through increasing four warm pipes and four valves form reasonable medium flow, realize the warm pump effect of standby pump, make standby pump need use can immediately put into use when using, second avoided the standby pump when adopting frequency conversion control make the check valve of standby pump export place frequent opening and closing, the situation of easy damage check valve occurs, simultaneously also avoided the situation of the impact damage of medium backflow to centrifugal pump impeller when canceling check valve occurs, in addition, the simple structure, the conversion cost is low, namely only needs to add four pipelines and four valves. BRIEF DESCRIPTION OF DRAWINGS
[0009] The drawings incorporated into the description and forming part of the description, show the embodiment of the utility model, and together with the description, be used for explaining the principle of the utility model.
[0010] In order to more clearly illustrate the above-mentioned and prior art technical scheme of the embodiment of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiment or prior art description, obviously, for those skilled in the art, without creative labor, can also obtain other drawings according to these drawings.
[0011] Figure 1 It is the whole structure schematic diagram of the utility model.
[0012] In the drawing: 1-first export hand valve, 2-first import hand valve, 3-second export hand valve, 4-second import hand valve, 5-first import warm pipe hand valve, 6-first export warm pipe hand valve, 7-second import warm pipe hand valve, 8-second export warm pipe hand valve, 9-first centrifugal pump, 10-second centrifugal pump, 11-first check valve, 12-second check valve, 13-import header, 14-export header. DETAILED DESCRIPTION
[0013] In order to more clearly illustrate the above-mentioned and prior art technical scheme of the embodiment of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiment or prior art description, obviously, for those skilled in the art, without creative labor, can also obtain other drawings according to these drawings.
[0014] In the description, it needs to be explained that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. It needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0015] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein; Obviously, the examples in the description are only a part of the examples of the present application, not all examples.
[0016] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0017] As Figure 1 shown, a centrifugal pump warm pump structure, including first centrifugal pump 9, second centrifugal pump 10, first inlet warm pipe, first outlet warm pipe, second inlet warm pipe, second outlet warm pipe, the outlet of first centrifugal pump 9 is equipped with first outlet pipe and is provided with first outlet hand valve 1 and first check valve 11 on first outlet pipe, first outlet pipe is communicated with outlet header 14, the inlet of first centrifugal pump 9 is equipped with first inlet pipe and is provided with first inlet hand valve 2 on first inlet pipe, first inlet pipe is communicated with inlet header 13, one end of first inlet warm pipe is communicated with outlet header 14, the other end of first inlet warm pipe is communicated with the inlet of first centrifugal pump 9, first inlet warm pipe is provided with first inlet warm pipe hand valve 5, one end of first outlet warm pipe is communicated with the outlet of first centrifugal pump 9, the other end of first outlet warm pipe is communicated with inlet header 13, first outlet warm pipe is provided with first outlet warm pipe hand valve 6, the outlet of second centrifugal pump 10 is equipped with second outlet pipe and is provided with second outlet hand valve 3 and second check valve 12 on second outlet pipe, second outlet pipe is communicated with outlet header 14, the inlet of second centrifugal pump 10 is equipped with second inlet pipe and is provided with second inlet hand valve 4 on second inlet pipe, second inlet pipe is communicated with inlet header 13, one end of second inlet warm pipe is communicated with outlet header 14, the other end of second inlet warm pipe is communicated with the inlet of second centrifugal pump 10, second inlet warm pipe is provided with second inlet warm pipe hand valve 7, one end of second outlet warm pipe is communicated with the outlet of second centrifugal pump 10, the other end of second outlet warm pipe is communicated with inlet header 13, second outlet warm pipe is provided with second outlet warm pipe hand valve 8, the inner diameter of first inlet warm pipe, first outlet warm pipe, second inlet warm pipe, second outlet warm pipe is less than the inner diameter of outlet header 14.
[0018] Working principle: assuming that the first centrifugal pump 9 is a use pump, the second centrifugal pump 10 is a standby pump, the first inlet hand valve 2, the first outlet hand valve 1 is opened, the first inlet warm pipe hand valve 5, the first outlet warm pipe hand valve 6 is closed, the second inlet hand valve 4, the second outlet hand valve 3 is closed, the second inlet warm pipe hand valve 7, the second outlet warm pipe hand valve 8 is opened, the first centrifugal pump 9 is started, the outlet pipe 14 pressure is greater than the inlet pipe 13 pressure, the outlet pipe 14 small part of medium flows to the second centrifugal pump 10 inlet through the second inlet warm pipe hand valve 7, then flows to the second centrifugal pump 10 outlet through the second centrifugal pump 10, and finally flows to the inlet pipe 13 through the second outlet warm pipe hand valve 8, so it can be seen that the first centrifugal pump 9 is in the use process, the second centrifugal pump 10 still has medium flowing, and is in the warm pump state.When the second centrifugal pump 10 is converted from a standby pump to a use pump, the second inlet hand valve 4 and the second outlet hand valve 3 are opened, so that the second centrifugal pump 10 can be started immediately, and the second centrifugal pump 10 can be used immediately.
[0019] In the specific implementation, the inner diameters of the first inlet warm pipe, the first outlet warm pipe, the second inlet warm pipe and the second outlet warm pipe are equal to 1 / 10 of the inner diameter of the outlet pipe 14, so that the specific structure for small flow medium flowing when the standby pump is warmed up is ensured.
[0020] The above merely describes specific implementation manners of the present application, so that those skilled in the art can understand or implement the present application. Although the foregoing embodiments are described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should be covered in the protection scope of the claims.
Claims
1. A centrifugal pump warm pump structure, comprising a first centrifugal pump (9), a second centrifugal pump (10), the outlet of the first centrifugal pump (9) is provided with a first outlet pipeline, and a first outlet hand valve (1) and a first check valve (11) are arranged on the first outlet pipeline, the first outlet pipeline is communicated with an outlet header (14), the inlet of the first centrifugal pump (9) is provided with a first inlet pipeline, and a first inlet hand valve (2) is arranged on the first inlet pipeline, the first inlet pipeline is communicated with an inlet header (13), the outlet of the second centrifugal pump (10) is provided with a second outlet pipeline, and a second outlet hand valve (3) and a second check valve (12) are arranged on the second outlet pipeline, the second outlet pipeline is communicated with the outlet header (14), the inlet of the second centrifugal pump (10) is provided with a second inlet pipeline, and a second inlet hand valve (4) is arranged on the second inlet pipeline, and the second inlet pipeline is communicated with the inlet header (13), characterized in that, The first inlet warm pipe, the first outlet warm pipe, the second inlet warm pipe and the second outlet warm pipe are communicated with the outlet main pipe (14), the inlet of the first centrifugal pump (9), the outlet of the first centrifugal pump (9), the inlet of the second centrifugal pump (10) and the outlet of the second centrifugal pump (10) respectively, and the inner diameters of the first inlet warm pipe, the first outlet warm pipe, the second inlet warm pipe and the second outlet warm pipe are all smaller than the inner diameter of the outlet main pipe (14).
2. A centrifugal pump warming-up structure according to claim 1, characterized in that The inner diameters of the first inlet warm pipe, the first outlet warm pipe, the second inlet warm pipe and the second outlet warm pipe are all equal to 1 / 10 of the inner diameter of the outlet main pipe (14).