Thermal insulation jacket heavy load guide vane type petrochemical process pump

Abstract

The invention 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, an inlet flange is connected to the other side of the pump body, an outlet flange is connected to the upper portion of the pump body, a bearing suspension is connected to the side of the pump cover, 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. It is guaranteed that the pump body cannot be damaged due to medium solidification or crystallization when the pump is in the working state or is restarted after shutdown, the service life of the pump body is prolonged, the working continuity of the pump body is guaranteed, the guide vane component is easy to disassemble and clean, and the production and manufacturing cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial thermal insulation jacket pumps, and in particular relates to a thermal insulation jacket heavy-load guide vane type petrochemical process pump. Background Art

[0002] In the process 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. For media of different properties, necessary and targeted design is required. For media that are easy to solidify, easy to crystallize and viscous, the flow parts of the centrifugal pump are usually wrapped with insulation materials or heating cables to reduce the impact of external temperature on the medium. Since the service life of the wrapped insulation material is short, it needs to be replaced regularly, which increases the maintenance cost.

[0003] The traditional guide vane pump structure does not have an insulation jacket structure, and the medium may condense in the pump body, causing blockage, and the pump cannot be delivered or rotated, which affects the normal operation of the pump and reduces the service life and efficiency of the pump. Although some other pumps have an insulation jacket structure, there have been cases where the large end surface of the insulation jacket has deformed (such as bulges or depressions) during long-term use, causing it to break, leak, and fail. In addition, when the existing guide vane petrochemical process pump is used to transport viscous or easily crystallized media, when the medium condenses or clogs in the pump body, the cleaning cost is high and the cycle is long. Summary of the invention

[0004] The present invention aims at the above-mentioned problems, makes up for the deficiencies of the prior art, and provides a thermal insulation jacketed heavy-duty guide vane petrochemical process pump; the present invention can make the guide vane petrochemical process pump have good thermal insulation during the transmission of liquids with special temperature requirements, thereby ensuring the performance of the transmitted liquid while ensuring that the pump body will not be damaged by medium solidification or crystallization when the pump is in working state or restarted after shutdown, thereby increasing the life of the pump body and ensuring the continuity of the pump body's operation. In addition, the guide vane components are easy to disassemble and clean, reducing production and manufacturing costs, and having significant economic and social benefits.

[0005] To achieve the above purpose, the present invention adopts the following technical solution.

[0006] The present invention provides a thermal insulation jacketed heavy-duty guide vane petrochemical process pump, comprising a pump body and a pump cover connected to one side of the pump body, the other side of the pump body is connected to an inlet flange, the top of the pump body is connected to an outlet flange, the bottom of the pump body is connected to a discharge flange, the side of the pump cover is connected to a bearing suspension, 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 through an impeller nut, and is characterized in that the pump body is connected to an annular thermal insulation jacket on the side where the inlet flange is located, a wear-resistant plate is detachably connected to the end surface of the pump body through a limit pin, and the pump cover is detachably connected to the guide vane through the end surface of the pump body in the pump body through a limit pin.

[0007] Furthermore, the annular thermal insulation jacket comprises a cover plate, an annular sleeve, a steam inlet flange and a steam outlet flange, the annular 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 support bolts, a cavity is provided between the annular thermal insulation jacket and the pump body, and the cavity is filled with heat-conducting liquid, the steam inlet flange and the steam outlet flange are respectively connected to the cover plate and communicate with the cavity, and the inlet flange is connected to the pump body after passing through the cover plate.

[0008] Furthermore, the cover plate is of split type, and at least two separate cover plates together form an annular structure.

[0009] Furthermore, a first static seal is provided on the pump body corresponding to the wear-resistant plate, and the first static seal is embedded in a groove provided on the pump body.

[0010] Furthermore, the pump cover is provided with a second static seal corresponding to the guide vane, and the second static seal is embedded in a groove provided on the pump cover.

[0011] Furthermore, a third static seal is provided at the junction of the pump body and the pump cover, and the third static seal is embedded in a groove provided on the pump cover.

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

[0013] Furthermore, an impeller sealing ring is provided between the wear-resistant plate and the rotating impeller, and between the guide vane and the rotating impeller.

[0014] Beneficial effects of the present invention.

[0015] The present invention provides an annular thermal insulation jacket on the guide vane process pump, so that the liquid with special temperature requirements can be well insulated during the transmission process, thereby ensuring the performance of the transmitted liquid and ensuring that the pump body will not be damaged due to solidification or crystallization of the medium when the pump is in a working state or restarted after shutdown. The support bolts with increased supporting strength are used to improve the strength of the annular thermal insulation jacket, prevent and reduce the occurrence and risk of deformation of the inner circulation jacket after cooling or heating, reduce operating costs, improve pump quality and reliability, increase the service life of the pump body, and ensure the continuity of the operation of the pump body.

[0016] In order to meet the use needs of special media that are prone to abrasion and corrosion, replaceable wear-resistant plates and guide vanes are set to reduce the cost of use. 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, which can meet the requirements of some special working conditions. When the wear-resistant plate is worn, it can be replaced separately, which is easy to disassemble and clean, reducing production and manufacturing costs, and has 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 present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the explosion structure of the thermal insulation jacket assembly of the present invention.

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

[0021] Markings in the figure: 1 is pump body, 2 is pump cover, 3 is inlet flange, 4 is outlet flange, 5 is discharge flange, 6 is bearing suspension, 7 is pump shaft, 8 is rolling bearing, 9 is impeller nut, 10 is rotating impeller, 11 is annular insulation jacket, 12 is wear-resistant plate, 13 is guide vane, 14 is cover plate, 15 is ring sleeve, 16 is steam inlet flange, 17 is steam outlet flange, 18 is support bolt, 19 is cavity, 20 is sub-cover plate, 21 is the first static seal, 22 is the second static seal, 23 is the third static seal, 24 is axial mechanical seal, 25 is impeller sealing ring. DETAILED DESCRIPTION

[0022] As shown in the accompanying drawings, this embodiment provides an insulated jacketed heavy-loaded guide vane petrochemical process pump, including 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 to the top of the pump body 1, and a discharge flange 5 is connected to the bottom of the pump body 1.

[0023] A bearing suspension 6 is connected to the side of the pump cover 2, and a pump shaft 7 is inserted into the bearing suspension 6. The pump shaft 7 is made of stainless steel, and the 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 passes through the pump cover 2 into the pump body 1. The pump shaft 7 is fixed with a rotating impeller 10 at the end inside the pump body 1 through an impeller nut 9. The impeller nut 9 is made of high-strength material to ensure stable fixation of the rotating impeller 10 under high load.

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

[0025] A wear-resistant plate 12 is detachably connected to the inner end surface of the pump body 1 through a limit pin. A first static seal 21 is provided at the pump body 1 corresponding to the wear-resistant plate 12. The first static seal 21 is embedded in a groove provided on the pump body 1 to prevent leakage.

[0026] The pump cover 2 is detachably connected to the guide vane 13 via a limit pin on the end surface in the pump body 1. The pump cover 2 is provided with a second static seal 22 corresponding to the guide vane 13, and the second static seal 22 is embedded in a groove provided on the pump cover 2 to achieve no leakage.

[0027] The first static seal 21 and the second static seal 22 are both designed with O-rings to achieve quick replacement and good sealing effect.

[0028] Impeller sealing rings 25 are provided between the wear-resistant plate 12 and the rotating impeller 10, and between the guide vanes 13 and the rotating impeller 10. Since the wear-resistant plate 12 and the guide vanes 13 are arranged as a detachable structure, the impeller sealing rings 25 are used to ensure the sealing between the rotating impeller 10 and the wear-resistant plate 12 and the guide vanes 13 when the rotating impeller 10 rotates.

[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 embedded in a groove provided on the pump cover 2 to achieve no leakage. The third static seal 23 adopts a metal spiral wound gasket to adapt to high temperature and high pressure environments.

[0030] The pump body 1 is connected to an annular thermal insulation jacket 11 on one side where the inlet flange 3 is located. The annular 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 provided in a split type, and the cover plate 14 is formed of an annular structure by at least two sub-cover plates 20 .

[0032] The annular sleeve 15 is sleeved on the outside of 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. The cover plate 14 is connected to the pump body 1 through a plurality of support bolts 18, which can increase the supporting strength of the annular thermal insulation 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 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 cavity 19. The inlet flange 3 passes through the cover plate 14 and is connected to the pump body 1. The steam inlet flange 16 and the steam outlet flange 17 are connected to the external steam heating circulation device, so that when the liquid is transported, the steam heating circulation device continuously circulates and heats the heat-conducting liquid in the cavity 19 to ensure that the temperature of the heat-conducting liquid in the cavity 19 is constant. The heat of the cavity 19 will be transmitted to the liquid in the pump body 1, so that the liquid is insulated during the transmission process and the temperature is kept constant, thereby ensuring the needs of the liquid with special temperature requirements, so that it is well insulated during the transmission process and has a constant temperature, thereby ensuring the performance of the transmitted 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 to the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents to achieve the same technical effects; as long as the use requirements are met, they are within the protection scope of the present invention.

Claims

1. A thermal insulation jacketed heavy-duty guide vane petrochemical process pump, comprising a pump body (1) and a pump cover (2) connected to one side of the pump body (1), the other side of the pump body (1) being connected to an inlet flange (3), the top of the pump body (1) being connected to an outlet flange (4), the bottom of the pump body (1) being connected to a discharge flange (5), the side of the pump cover (2) being connected to a bearing suspension (6), a pump shaft (7) being inserted into the bearing suspension (6), the pump shaft (7) being connected to the bearing suspension (6) via a rolling bearing (8) and passing through the pump cover (2) and extending into the pump body (1), the pump shaft (7) being fixed to a rotating impeller (10) at an inner end of the pump body (1) via an impeller nut (9), characterized in that: The pump body (1) is connected to an annular heat-insulating jacket (11) on the side where the inlet flange (3) is located, the inner end surface of the pump body (1) is detachably connected to a wear-resistant plate (12) via a limit pin, and the pump cover (2) is detachably connected to a guide vane (13) on the inner end surface of the pump body (1) via a limit pin.

2. The thermal insulation jacket heavy-duty guide vane petrochemical process pump according to claim 1, characterized in that: The annular thermal insulation jacket (11) comprises a cover plate (14), an annular sleeve (15), a steam inlet flange (16) and a steam outlet flange (17); the annular 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) via a plurality of support bolts (18); a cavity (19) is provided between the annular thermal insulation 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 is connected to the pump body (1).

3. The thermal insulation jacket heavy-duty guide vane petrochemical process pump according to claim 2, characterized in that: The cover plate (14) is of split type, and at least two separate cover plates (20) together form an annular structure.

4. The thermal insulation jacket heavy-duty guide vane petrochemical process pump according to claim 1, characterized in that: The pump body (1) is provided with a first static seal (21) at a position corresponding to the wear-resistant plate (12), and the first static seal (21) is embedded in a groove provided on the pump body (1).

5. The thermal insulation jacket heavy-duty guide vane petrochemical process pump according to claim 1, characterized in that: The pump cover (2) is provided with a second static seal (22) at a position corresponding to the guide vane (13), and the second static seal (22) is embedded in a groove provided on the pump cover (2).

6. The thermal insulation jacket heavy-duty guide vane petrochemical process pump according to claim 1, characterized in that: A third static seal (23) is provided at the junction of the pump body (1) and the pump cover (2), and the third static seal (23) is embedded in a groove provided on the pump cover (2).

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

8. The thermal insulation jacketed heavy-duty guide vane petrochemical process pump according to claim 1, characterized in that: Impeller sealing rings (25) are provided between the wear-resistant plate (12) and the rotating impeller (10), and between the guide vanes (13) and the rotating impeller (10).

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