CN214221607U

CN214221607U - Single-stage centrifugal pump body insulation structure

Info

Publication number: CN214221607U
Application number: CN202023096983.3U
Authority: CN
Inventors: 刘哲; 张可; 董泽
Original assignee: Shenyang Kaiquan Petrochemical Pump Co ltd
Current assignee: Shenyang Kaiquan Petrochemical Pump Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-09-17
Anticipated expiration: 2030-12-21

Abstract

The utility model relates to a single-stage centrifugal pump body insulation construction, including the pump suction mouth, the outside in pump suction mouth is equipped with the straw section, and the right side of straw section is equipped with the awl shell, and the left side of straw section is equipped with flat casing, and flat casing is inside to be equipped with cyclic annular brace table, is equipped with the heat preservation ring chamber between flat casing and the awl shell, and the heat preservation ring chamber is including leading to ring chamber and turbulent flow chamber, and the maximum diameter that leads to the ring chamber is greater than the maximum diameter of awl shell hole, and the turbulent flow intracavity is even to be equipped with the breakwater, is equipped with the page turning plate between the breakwater. The utility model discloses a flat casing that straw section outside increased heat preservation coating has wrapped up whole straw section on a large scale, and the breakwater can guarantee with the commentaries on classics page or leaf board that the heat preservation medium in the cavity is turbulent state always, and the heat preservation medium contacts well with leading the temperature ring, has better heat exchange effect, and heat retaining effect is fabulous, and holistic structural strength is high simultaneously, and stress deformation is little not fragile revealing.

Description

Single-stage centrifugal pump body insulation structure

Technical Field

The utility model belongs to the technical field of the centrifugal pump, a pump body suction inlet keeps warm, in particular to single-stage centrifugal pump body insulation construction.

Background

In industrial pumps or pumps for chemical industry, centrifugal pumps have been widely used because of their good efficiency and performance. When the centrifugal pump conveys a medium with high viscosity, consistency and easy crystallization, the medium in the pump body can be cooled (or insulated) through liquid nitrogen and water (steam) outside the existing centrifugal pump product, and the phenomena of condensation, crystallization, vaporization and the like of the medium in the conveying process are avoided. However, the heat preservation at the pump opening of the existing centrifugal pump is often ignored, because the structure at the pump body suction opening of the conventional centrifugal pump is very simple and has no heat preservation structure, or the heat preservation structure is only welded by a round steel pipe, the heat preservation performance at the pump opening becomes very poor, and the pump opening is welded and manufactured to have the stress deformation, the leakage phenomenon is very easy to occur to influence the heat preservation, when some media with high viscosity and high requirements on conveying working conditions are conveyed, the crystallization phenomenon of the media at the pump opening is easily caused, the service life of the mechanical seal is seriously shortened, and the blockage of the pump body can be caused under the very serious condition.

SUMMERY OF THE UTILITY MODEL

The invention provides a single-stage centrifugal pump body heat-insulating structure, which aims to solve the technical problems that when the centrifugal pump is used for conveying a medium with high viscosity or high working condition requirement, the heat-insulating performance of a pump opening of a pump body is poor, the structural stress is large, and the pump body is easy to deform and leak.

The utility model provides a technical scheme that above-mentioned technical problem took is: the utility model provides a single-stage centrifugal pump body insulation construction, its structural feature lies in, including the pump suction mouth, the outside in pump suction mouth is equipped with the straw section, the right side of straw section is equipped with the awl shell, the left side of straw section is equipped with flat casing, the inside cyclic annular brace table that is equipped with of flat casing, be equipped with the heat preservation ring chamber between flat casing and the awl shell, the heat preservation ring chamber is including leading to ring chamber and turbulent flow chamber, the maximum diameter that leads to the ring chamber is greater than the maximum diameter of awl shell hole, the turbulent flow intracavity is even to be equipped with the breakwater, be equipped with the page turning plate between the breakwater, it is equipped with first interface to lead to the ring chamber top, be equipped with the second interface on the flat casing end face shell of logical ring chamber below, first interface passes through heat preservation ring chamber intercommunication with the second interface.

Furthermore, the suction pipe section, the conical shell, the flat shell, the annular supporting platform and the water baffle are integrally manufactured or are manufactured by connecting two half-shaped split bolts.

Furthermore, a temperature conduction ring is arranged outside the suction pipe section and is connected with the suction pipe section through screws, and heat exchange fins are arranged on the outer surface of the temperature conduction ring.

Furthermore, the outer surfaces of the flat shell outside the heat-insulating ring cavity and the shell at the joint of the flat shell and the conical shell are respectively provided with a heat-insulating coating.

Furthermore, the blade rotating plate is rotatably connected with the annular supporting platform and the conical shell, and hanging lugs are arranged on two sides of the blade rotating plate.

The utility model has the advantages that: the utility model has the advantages that the flat shell is added outside the straw section to wrap the whole straw section in a large range, the coverage area is large and comprehensive, the heat preservation range and the heat preservation area are large, the heat preservation coating outside the flat shell can effectively prevent the rapid release of the temperature in the heat preservation ring cavity, and the heat preservation effect is good; meanwhile, the water baffle is arranged in the turbulent flow cavity of the heat-insulating ring cavity, so that the condition of laminar flow of the heat-insulating medium is prevented, the water baffle can ensure that the heat-insulating medium in the cavity is always in a turbulent flow state, the page turning plate rotates in a reciprocating mode irregularly along with liquid flow, the heat-insulating medium can be better contacted with the heat-conducting ring outside the suction pipe section, a better heat exchange effect is achieved, the heat-insulating effect is enhanced, the medium can be kept in an original state at the mechanical seal position of the pump suction cavity and is not easy to crystallize, and the service life of the mechanical seal is prolonged; the whole structural strength can be enhanced between the flat shell and the conical shell through the annular supporting table and the water baffle, the stress deformation is small, the leakage is not easy to damage, in addition, the structural strength is high, the stability during liquid conveying is stable, the pulsation is avoided, the vibration is small, the noise is low, and the enhancement of the conveying stability of the pump is ensured.

Drawings

Fig. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic sectional view of the A-A direction of the present invention;

FIG. 3 is a schematic front view of the temperature ring of the present invention;

FIG. 4 is a schematic left side view of the thermal ring of the present invention;

fig. 5 is a schematic front view of the hinge plate of the present invention;

fig. 6 is a left side view structure diagram of the page turning plate of the present invention;

in the figure: the heat-insulation device comprises a pump suction cavity 1, a suction pipe section 2, a heat-conduction ring 21, a heat exchange sheet 211, a conical shell 3, a flat shell 4, a heat-insulation coating 41, an annular support table 5, a heat-insulation annular cavity 6, a through annular cavity 61, a turbulent flow cavity 62, a water baffle 7, a hinge plate 8, a hanging lug 81, a first connector 9 and a second connector 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of the embodiments of the present invention, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

As an example, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, a single-stage centrifugal pump body thermal insulation structure is characterized in that the structure comprises a pumping cavity 1, the pumping cavity 1 is a suction port of a single-stage centrifugal pump body, a suction pipe section 2 is arranged outside the pumping cavity 1, the suction pipe section 2 is in a circular pipe shape, a conical shell 3 is arranged on the right side of the suction pipe section 2, the conical shell 3 and the suction pipe section 2 can be integrally cast, a flat shell 4 is arranged on the left side of the suction pipe section 2, an annular support platform 5 is arranged inside the flat shell 4, the annular support platform 5 and the flat shell 4 are integrally cast, the maximum diameter of the outer circle of the flat shell 4 can be larger than the maximum diameter of the inner hole of the conical shell 3, it is ensured that the suction pipe section 2 and the conical shell 3 are all wrapped up, the annular support platform 5 can effectively support the flat shell 4 in a transition way, the structure strength is high, and the structure stability is good, the flat casing 4 is minimum with the integrative casting of cyclic annular brace table 5 structure stress, in the embodiment of the utility model discloses a flat casing 4 can be made with the outside centrifugal pump body an organic whole of awl shell 3, and flat casing 4 also can be the bolted connection of the sealed pad of split type merger nip with awl shell 3 for two halves form. An annular heat-preservation ring cavity 6 is formed between the flat shell 4 and the conical shell 3, the heat-preservation ring cavity 6 can comprise a through ring cavity 61 and a turbulent flow cavity 62, the through ring cavity 61 is arranged outside the turbulent flow cavity 62, and the maximum diameter of the through ring cavity 61 can be larger than the maximum diameter of an inner hole of the conical shell 3, so that the suction pipe section 2 can be protected to the maximum extent to have enough heat exchange storage space. As an example, referring to fig. 1, 2, 3 and 4, a temperature ring 21 may be disposed outside the suction pipe section 2, the temperature ring 21 may be connected to an outer circumferential wall of the suction pipe section 2 by a screw, the temperature ring 21 may be made of a corrosion-resistant material with good thermal conductivity, the outer surface of the temperature ring 21 may be uniformly provided with raised heat exchanging fins 211, and the temperature ring 21 may better exchange the temperature of the heat-preserving ring cavity 6 with the suction pipe section 2 through the uniformly distributed heat exchanging fins 211. The outer surfaces of the flat shell 4 outside the heat-insulating annular cavity 6 and the shell at the joint of the flat shell 4 and the conical shell 3 are both provided with heat-insulating coatings 41, and the heat-insulating coatings 41 are thermal-sprayed or laser-deposited metal ceramic coatings or heat-insulating coating coatings. As an example, referring to fig. 1 and 2, the water baffles 7 are uniformly arranged in the turbulent flow cavity 62, the number of the water baffles 7 is four, the water baffles 7 are uniformly arranged, the water baffles 7 can be integrally formed with the flat shell 4 or the conical shell 3, the structure between the flat shell 4 and the conical shell 3 can be reinforced by the four water baffles 7, and the water baffles 7 can play a role in disturbing water flow and also play a role in reinforcing a tie bar for structural strength. Referring to the attached

drawings

1, 2, 5 and 6, the hinge plates 8 are arranged between the water baffles 7, the number of the hinge plates 8 is four, hanging lugs 81 are arranged on two sides of the hinge plates 8, the hanging lugs 81 are in a circular shaft shape, the hanging lugs 81 and the hinge plates 8 are integrally formed, the hinge plates 8 are rotatably connected with the annular supporting platform 5 and the conical shell 3 through the hanging lugs 81, the hinge plates 8 can be pushed to rotate along with the flow direction of the temperature control medium between the water baffles 7, the hinge plates 8 can enable the temperature control medium between the water baffles 7 to be in a turbulent state all the time, and the temperature of the temperature control heat preservation medium can be better ensured to be in contact with the suction pipe section 2 through the temperature guide ring 21 to change the temperature of the conveying medium in the pump suction cavity 1. A first connector 9 is arranged above the annular cavity 61, a second connector 10 is arranged on the end surface shell of the flat shell 4 below the annular cavity 61, and the first connector 9 and the second connector 10 form a communicated passage through the heat-preservation annular cavity 6.

In the specific embodiment of the utility model, when the pump suction cavity 1 in the suction pipe section 2 needs to be heated, various heating mediums such as hot steam, heat conduction oil and the like are sent into the heat preservation annular cavity 6 from the first interface 9 through the pipeline connection, and heat preservation can be carried out through the heat preservation annular cavity 6; when the pump suction cavity 1 in the suction pipe section 2 needs to be cooled, the constant temperature of the pump body can be kept through various cooling liquids such as liquid nitrogen or other low-temperature liquids, so that the medium can keep the characteristics of the medium as much as possible in the operation process of the pump, the phenomena of condensation, crystallization, vaporization and the like of the medium in the conveying process are avoided, and the phenomenon of conveying blockage of a centrifugal pump is avoided.

The utility model has the advantages that the flat shell 4 is added outside the suction pipe section 2 to wrap the whole suction pipe section 2 in a large range, the coverage is large and comprehensive, the heat preservation range and the heat preservation area are large, the heat preservation coating 41 outside the flat shell 4 can effectively prevent the temperature in the heat preservation annular cavity 6 from being released quickly, and the heat preservation effect is good; meanwhile, the water baffle 7 is arranged in the turbulent flow cavity 62 of the heat-insulating ring cavity 6, so that the condition of laminar flow of the heat-insulating medium is prevented, the water baffle 7 can ensure that the heat-insulating medium in the cavity is always in a turbulent flow state, the page turning plate 8 rotates in a reciprocating mode irregularly along with liquid flow, the heat-insulating medium can be better contacted with the heat-conducting ring 21 outside the suction pipe section 2, the heat exchange effect is better, the heat-insulating effect is enhanced, the medium can be kept in an original state at the mechanical seal position of the suction pump cavity 1 and is not easy to crystallize, and the service life of the mechanical seal is prolonged; the whole structural strength can be enhanced between the flat shell 4 and the conical shell 3 through the annular supporting platform 5 and the water baffle 7, the stress deformation is small, the leakage is not easy to damage, in addition, the structural strength is high, the stability during liquid conveying is stable, no pulsation exists, the vibration is small, the noise is low, and the enhancement of the conveying stability of the pump is ensured.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be dominated by the protection scope of the claims.

Claims

1. The utility model provides a single-stage centrifugal pump body insulation construction which characterized in that: the suction mouth cavity is pumped, the outside in the suction mouth cavity is equipped with the straw section, the right side of straw section is equipped with the awl shell, the left side of straw section is equipped with flat casing, the inside cyclic annular brace table that is equipped with of flat casing, be equipped with the heat preservation ring chamber between flat casing and the awl shell, the heat preservation ring chamber is including leading to ring chamber and turbulent flow chamber, the maximum diameter that leads to the ring chamber is greater than the maximum diameter of awl shell hole, the even breakwater that is equipped with in turbulent flow chamber, be equipped with the blade of turning between the breakwater, it is equipped with first interface to lead to the ring chamber top, be equipped with the second interface on the flat casing end surface shell of logical ring chamber below, first interface passes through heat preservation ring chamber intercommunication with the second interface.

2. The pump body heat insulation structure of the single-stage centrifugal pump according to claim 1, wherein: the suction pipe section, the conical shell, the flat shell, the annular supporting platform and the water baffle are integrally manufactured or are manufactured by connecting two half-shaped split bolts.

3. The pump body heat insulation structure of the single-stage centrifugal pump according to claim 1, wherein: the outside of the suction pipe section is provided with a temperature conduction ring, the temperature conduction ring is connected with the suction pipe section through screws, and the outer surface of the temperature conduction ring is provided with heat exchange fins.

4. The pump body heat insulation structure of the single-stage centrifugal pump according to claim 1, wherein: and heat-insulating coatings are respectively arranged on the outer surfaces of the flat shell outside the heat-insulating ring cavity and the shell at the joint of the flat shell and the conical shell.

5. The pump body heat insulation structure of the single-stage centrifugal pump according to claim 1, wherein: the blade rotating plate is rotatably connected with the annular supporting table and the conical shell, and hanging lugs are arranged on two sides of the blade rotating plate.