Thermal insulation jacket heavy load guide vane type petrochemical process pump

Abstract

The utility model discloses a heat-preservation jacket heavy-load guide vane type petrochemical process pump and belongs to the technical field of industrial heat-preservation jacket pumps. The pump comprises a pump body and a pump cover connected to one side of the pump body, the other side of the pump body is connected with an inlet flange, the upper portion of the pump body is connected with an outlet flange, the side of the pump cover is connected with a bearing suspension, a pump shaft is inserted into the bearing suspension, and the pump shaft is connected with the bearing suspension through a rolling bearing, penetrates through the pump cover and extends into the pump body. A rotary impeller is fixed to the end, in the pump body, of the pump shaft, the side, where the inlet flange is located, of the pump body is connected with an annular heat preservation jacket, the inner end face of the pump body is detachably connected with a wear-resisting plate through a limiting pin, and the end face, in the pump body, of the pump cover is detachably connected with a guide vane through a limiting pin. According to the utility model, the pump body cannot be damaged due to solidification or crystallization of a medium when the pump is in a working state or is restarted after shutdown, the service life of the pump body is prolonged, the working continuity of the pump body is ensured, the guide vane part is easy to disassemble and clean, and the production and manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial heat-insulating jacket pumps, and particularly relates to a heat-insulating jacket heavy-duty diffuser-type petrochemical process pump. Background Art

[0002] In the process flows of petrochemical industry, especially heavy chemical industry, centrifugal pumps have been widely used in the transportation of various media such as easy-to-crystallize, easy-to-solidify, high-temperature viscous, abrasive and corrosive media. For media with different properties, necessary and targeted designs are required. For easy-to-solidify, easy-to-crystallize and viscous media, generally, the flow-through parts of centrifugal pumps are insulated by heat-insulating materials or traced by heating cables to reduce the influence of external temperature on the media. Since the service life of the wrapped heat-insulating materials is relatively short and needs to be replaced regularly, the maintenance cost is increased.

[0003] However, the traditional diffuser pump structure does not have a heat-insulating jacket structure, and there are problems that the medium condenses in the pump body, causing blockage, resulting in the phenomenon that the liquid cannot be pumped out or the pump cannot rotate, which affects the normal operation of the pump and reduces the service life and operating efficiency of the pump. Although some other pumps have heat-insulating jacket structures, in the long-term application process, there have been cases where the large end surface of the heat-insulating jacket is deformed (such as bulging or concaving), resulting in its damage, leakage and failure. In addition, when the existing diffuser-type petrochemical process pump transports viscous or easy-to-crystallize media, when the medium condenses or blocks in the pump body, the cleaning cost is high and the cycle is long. Summary of the Utility Model

[0004] The utility model aims at the above problems, makes up for the deficiencies of the prior art, and provides a heat-insulating jacket heavy-duty diffuser-type petrochemical process pump; the utility model can enable the diffuser-type petrochemical process pump to have good heat insulation during the transmission of liquids with special temperature requirements, ensure the performance of the transported liquid, and at the same time ensure that the pump body will not be damaged due to medium solidification or crystallization when the pump is in the working state or restarted after shutdown, improve the service life of the pump body, ensure the continuity of the pump body operation. In addition, the diffuser component is easy to disassemble and clean, reducing the production and manufacturing costs, and having remarkable economic and social benefits.

[0005] To achieve the above object, the utility model adopts the following technical solutions.

[0006] The utility model provides a heat-insulating jacket heavy-duty guide vane type petrochemical process pump, which comprises a pump body and a pump cover connected to one side of the pump body. An inlet flange is connected to the other side of the pump body, an outlet flange is connected above the pump body, and a drain flange is connected below the pump body. A bearing suspension is connected to the side of the pump cover. A pump shaft is inserted into the bearing suspension. The pump shaft is connected to the bearing suspension through a rolling bearing and extends into the pump body through the pump cover. A rotating impeller is fixed to the inner end of the pump shaft in the pump body by an impeller nut. It is characterized in that a ring-shaped heat-insulating jacket is connected to the side of the pump body where the inlet flange is located. A wear-resistant plate is detachably connected to the inner end face of the pump body through a limit pin, and a guide vane is detachably connected to the end face of the pump cover in the pump body through a limit pin.

[0007] Further, the ring-shaped heat-insulating jacket comprises a cover plate, a ring sleeve, a steam inlet flange and a steam outlet flange. The ring sleeve is sleeved outside the cover plate and connected to the pump body. The cover plate is connected to the pump body through a plurality of pillar bolts. There is a cavity between the ring-shaped heat-insulating jacket and the pump body, and the cavity is filled with a heat-conducting liquid. The steam inlet flange and the steam outlet flange are respectively connected to the cover plate and communicated with the cavity inside. The inlet flange passes through the cover plate and then is connected to the pump body.

[0008] Furthermore, the cover plate is of a split type and is jointly formed into a ring structure by at least two sub-cover plates.

[0009] Further, a first static seal is arranged at the position of the pump body corresponding to the wear-resistant plate, and the first static seal is inlaid in a groove arranged on the pump body.

[0010] Further, a second static seal is arranged at the position of the pump cover corresponding to the guide vane, and the second static seal is inlaid in a groove arranged on the pump cover.

[0011] Further, a third static seal is arranged at the joint of the pump body and the pump cover, and the third static seal is inlaid in a groove arranged on the pump cover.

[0012] Further, a fixing part of an axial mechanical seal is connected to the end of the pump cover in the bearing suspension, and the pump shaft is connected to a rotating part of the axial mechanical seal.

[0013] Further, impeller seal rings are arranged between the wear-resistant plate and the rotating impeller, and between the guide vane and the rotating impeller.

[0014] The beneficial effects of the utility model.

[0015] The utility model provides a ring-shaped heat preservation jacket on a guide vane type flow pump, so that the liquid with special temperature requirements can be well insulated during the transmission process, ensuring the performance of the transmitted liquid and preventing the pump body from being damaged due to medium solidification or crystallization when the pump is in the working state or restarted after shutdown. In addition, the pillar bolts are added to increase the support strength, improve the strength of the ring-shaped heat preservation jacket, prevent and reduce the occurrence and risk of deformation of the inner circulation jacket after cooling and heating, reduce the operation cost, improve the quality and reliability of the pump, extend the service life of the pump body, and ensure the continuity of the pump body operation.

[0016] To meet the use requirements of special media such as easy abrasion and corrosion, replaceable wear-resistant plates and guide vanes are provided, which can reduce the use cost. When the pump flow needs to be increased or decreased, the pump guide vanes can be replaced without replacing the rotating impeller and wear-resistant plates, meeting the requirements under some special working conditions. When the wear-resistant plates are worn, they can be replaced separately, which is easy to disassemble and clean, reducing the production and manufacturing costs, and having significant economic and social benefits. Brief Description of the Drawings

[0017] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clearly understood, the following further details the utility model in conjunction with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0018] Figure 1 It is a schematic diagram of the overall sectional structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the blasting structure of the heat preservation jacket assembly of the utility model.

[0020] Figure 3 It is a schematic diagram of the explosion structure of the liquid flow-through components of the utility model.

[0021] Reference numerals in the drawings: 1 is the pump body, 2 is the pump cover, 3 is the inlet flange, 4 is the outlet flange, 5 is the drain flange, 6 is the bearing suspension, 7 is the pump shaft, 8 is the rolling bearing, 9 is the impeller nut, 10 is the rotating impeller, 11 is the ring-shaped heat preservation jacket, 12 is the wear-resistant plate, 13 is the guide vane, 14 is the cover plate, 15 is the ring sleeve, 16 is the steam inlet flange, 17 is the steam outlet flange, 18 is the pillar bolt, 19 is the cavity, 20 is the sub-cover plate, 21 is the first static seal, 22 is the second static seal, 23 is the third static seal, 24 is the axial mechanical seal, 25 is the impeller seal ring. Detailed Description of the Embodiments

[0022] As shown in the accompanying drawings, this embodiment provides a thermal insulation jacket heavy-duty guide vane type petrochemical process pump, which includes a pump body 1 and a pump cover 2 connected to one side of the pump body 1. An inlet flange 3 is connected to the other side of the pump body 1, an outlet flange 4 is connected above the pump body 1, and a drain flange 5 is connected below the pump body 1.

[0023] A bearing suspension 6 is connected to the side of the pump cover 2. A pump shaft 7 is inserted into the bearing suspension 6. The pump shaft 7 is made of stainless steel material and its surface is specially treated to enhance corrosion resistance and wear resistance. The pump shaft 7 is connected to the bearing suspension 6 through a rolling bearing 8 and extends into the pump body 1 through the pump cover 2. A rotating impeller 10 is fixed to the inner end of the pump shaft 7 in the pump body 1 by an impeller nut 9. The impeller nut 9 is made of high-strength material to ensure the stable fixation of the rotating impeller 10 under high load.

[0024] The end of the pump cover 2 inside the bearing suspension 6 is connected to the fixed part of the axial mechanical seal 24, and the pump shaft 7 is connected to the rotating part of the axial mechanical seal 24.

[0025] A wear-resistant plate 12 is detachably connected to the inner end face of the pump body 1 through a limit pin. A first static seal 21 is provided at the position of the pump body 1 corresponding to the wear-resistant plate 12. The first static seal 21 is installed in a groove provided on the pump body 1 to achieve leak-free.

[0026] A guide vane 13 is detachably connected to the inner end face of the pump cover 2 in the pump body 1 through a limit pin. A second static seal 22 is provided at the position of the pump cover 2 corresponding to the guide vane 13. The second static seal 22 is installed in a groove provided on the pump cover 2 to achieve leak-free.

[0027] Both the first static seal 21 and the second static seal 22 adopt an O-ring design to achieve quick replacement and good sealing effect.

[0028] An impeller seal ring 25 is provided between the wear-resistant plate 12 and the rotating impeller 10, and between the guide vane 13 and the rotating impeller 10. Since the wear-resistant plate 12 and the guide vane 13 are arranged in a detachable structure, the impeller seal ring 25 is used to ensure the sealing between the rotating impeller 10 and the wear-resistant plate 12 and the guide vane 13 during rotation.

[0029] A third static seal 23 is provided at the joint of the pump body 1 and the pump cover 2. The third static seal 23 is installed in a groove provided on the pump cover 2 to achieve leak-free. The third static seal 23 adopts a metal wound gasket to adapt to high-temperature and high-pressure environments.

[0030] A ring-shaped thermal insulation jacket 11 is connected to the side of the pump body 1 where the inlet flange 3 is located. The ring-shaped thermal insulation jacket 11 includes a cover plate 14, a ring sleeve 15, a steam inlet flange 16 and a steam outlet flange 17.

[0031] In order to facilitate passing through the inlet flange 3 during installation, the cover plate 14 is set as a split type, and the cover plate 14 is jointly formed into an annular structure by at least two sub-cover plates 20.

[0032] The collar 15 is sleeved outside the cover plate 14 and connected to the pump body 1. A plurality of screw holes are correspondingly arranged on the cover plate 14 and the pump body 1, and the cover plate 14 is connected to the pump body 1 through a plurality of strut bolts 18, which can increase the support strength of the annular heat-insulating jacket 11.

[0033] There is a cavity 19 between the annular heat-insulating jacket 11 and the pump body 1, and the cavity 19 is filled with a heat-conducting liquid. The steam inlet flange 16 and the steam outlet flange 17 are respectively connected to the cover plate 14 and communicate with the cavity 19. The inlet flange 3 passes through the cover plate 14 and then is connected to the pump body 1. By connecting the steam inlet flange 16 and the steam outlet flange 17 to an external steam heating circulation device, the steam heating circulation device continuously circulates and heats the heat-conducting liquid in the cavity 19 when transporting the liquid, ensuring that the temperature of the heat-conducting liquid in the cavity 19 is constant. The heat of the cavity 19 will be transferred to the liquid in the pump body 1, so that the liquid is insulated during the transmission process, maintaining a constant temperature, and further ensuring the requirements for liquids with special temperature requirements, enabling the liquid to be well insulated during the transmission process and having a constant temperature, and further ensuring the performance of the transported liquid.

[0034] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited by the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as it meets the use requirements, it is within the protection scope of the present invention.

Claims

1. A heat-insulating jacket heavy-duty guide vane type petrochemical process pump, comprising a pump body (1) and a pump cover (2) connected to one side of the pump body (1). An inlet flange (3) is connected to the other side of the pump body (1), an outlet flange (4) is connected above the pump body (1), a drain flange (5) is connected below the pump body (1), a bearing suspension (6) is connected to the side of the pump cover (2), a pump shaft (7) is inserted into the bearing suspension (6), the pump shaft (7) is connected to the bearing suspension (6) through a rolling bearing (8) and extends into the pump body (1) through the pump cover (2), and a rotating impeller (10) is fixed to the inner end of the pump shaft (7) in the pump body (1) by an impeller nut (9). It is characterized in that, The pump body (1) is connected with an annular heat-insulating jacket (11) on the side where the inlet flange (3) is located. A wear-resistant plate (12) is detachably connected to the inner end face of the pump body (1) through a limit pin. A guide vane (13) is detachably connected to the inner end face of the pump cover (2) in the pump body (1) through a limit pin.

2. The heavy-duty guide vane type petrochemical process pump with a heat preservation jacket according to claim 1, characterized in that, The annular heat-insulating jacket (11) includes a cover plate (14), a ring sleeve (15), a steam inlet flange (16) and a steam outlet flange (17). The ring sleeve (15) is sleeved outside the cover plate (14) and connected to the pump body (1). The cover plate (14) is connected to the pump body (1) through a plurality of pillar bolts (18). A cavity (19) is formed between the annular heat-insulating jacket (11) and the pump body (1), and the cavity (19) is filled with a heat-conducting liquid. The steam inlet flange (16) and the steam outlet flange (17) are respectively connected to the cover plate (14) and communicated with the inside of the cavity (19). The inlet flange (3) passes through the cover plate (14) and then is connected to the pump body (1).

3. The heavy-duty guide vane type petrochemical process pump with a heat preservation jacket according to claim 2, wherein, The cover plate (14) is of a split type and jointly forms an annular structure by at least two sub-cover plates (20).

4. A heat-insulating jacket heavy-duty guide vane type petrochemical process pump according to claim 1, characterized in that, A first static seal (21) is arranged at the position of the pump body (1) corresponding to the wear-resistant plate (12), and the first static seal (21) is inlaid in a groove arranged on the pump body (1).

5. The heavy-duty guide vane type petrochemical process pump with a heat-insulating jacket according to claim 1, characterized in that, A second static seal (22) is arranged at the position of the pump cover (2) corresponding to the guide vane (13), and the second static seal (22) is inlaid in a groove arranged on the pump cover (2).

6. A heat-insulating jacket heavy-duty guide vane type petrochemical process pump according to claim 1, characterized in that, A third static seal (23) is arranged at the joint of the pump body (1) and the pump cover (2), and the third static seal (23) is inlaid in a groove arranged on the pump cover (2).

7. The heavy-duty guide vane type petrochemical process pump with a heat-insulating jacket according to claim 1, characterized in that, The end of the pump cover (2) in the bearing suspension (6) is connected with a fixed part of an axial mechanical seal (24), and the pump shaft (7) is connected with a rotating part of the axial mechanical seal (24).

8. A heat-insulating jacket heavy-duty guide vane type petrochemical process pump according to claim 1, characterized in that, An impeller seal ring (25) is arranged between the wear-resistant plate (12) and the rotating impeller (10) and between the guide vane (13) and the rotating impeller (10).

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