Radial subdivision heavy station petrochemical engineering process pump with special cavity structure

Abstract

The utility model discloses a radial subdivision heavy station petrochemical engineering process pump with a special cavity structure, which comprises a pump body and a pump cover, the pump body is fixedly connected with the pump cover, G-shaped annular cavities are arranged in the pump body and the pump cover, a plurality of water-cooling interfaces are arranged on the pump body and the pump cover, the water-cooling interfaces are communicated with the G-shaped annular cavities, and the G-shaped annular cavities are communicated with the water-cooling interfaces. A water cooling cavity cover is arranged on the G-shaped annular cavity, mounting grooves and first annular grooves are formed in the pump body and the pump cover, the water cooling cavity cover is located in the mounting grooves, a pressing plate is arranged on the pump cover, the pressing plate is clamped in the first annular grooves, a second annular groove and a third annular groove are formed in the water cooling cavity cover, and an O-shaped outer sealing ring is arranged in the second annular groove. An O-shaped inner sealing ring is installed in the third annular groove. The utility model solves the problems that the cooling effect of bearing box cooling and pump base supporting leg cooling on the pump head is poor, the design of a heat preservation jacket is complex, the cost is high, and a coverage blind area exists in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a radially split heavy-station petrochemical process pump with a special cavity structure. Background Art

[0002] The existing radially split heavy-duty petrochemical process pump cooling structures in the industry generally include three forms: bearing box cooling, pump base foot cooling and pump head insulation jacket.

[0003] The first type of bearing box cooling mainly cools the lubricating oil in the bearing box and does not cool the pump head itself.

[0004] The second type is pump base foot cooling, the principle of which is to connect the cooling medium to the pump base foot for circulation. Its characteristic is that the cooling structure only contacts the central support bladder of the pump body, the heat exchange area is small, and the cooling effect is poor.

[0005] The third type is the pump head insulation jacket. This structural feature is that the jacket shell is welded to the radial outer circle of the pump body, which allows the cooling medium to be in integral contact with the radial outer surface of the pump body, and has a good cooling / insulating effect on the radial surface of the pump body. However, due to the need to retain the separate structure of the pump cover and the pump body, the insulation jacket cannot cover the end faces on both sides of the pump head, resulting in blind spots. In addition, this structure has high cost and complex design. It is generally not used unless under extreme special working conditions.

[0006] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a radially split heavy-station petrochemical process pump with a special cavity structure to overcome the problems existing in the prior art. Utility Model Content

[0007] The purpose of the utility model is to provide a radially split heavy-station petrochemical process pump with a special cavity structure to solve the problems existing in the above-mentioned prior art, improve the cooling effect of the bearing box cooling and the pump base support foot cooling on the pump head, and reduce the design cost of the insulation jacket.

[0008] To achieve the above purpose, the utility model provides the following solution: The utility model provides a radially split heavy-station petrochemical process pump with a special cavity structure, including:

[0009] A pump body and a pump cover, wherein the pump body and the pump cover are fixedly connected, a G-type annular cavity is provided in the pump body and the pump cover, a plurality of water-cooling interfaces are provided on the pump body and the pump cover, the water-cooling interfaces are communicated with the G-type annular cavity, a water-cooling cavity cover is provided on the G-type annular cavity, a mounting groove and an annular groove 1 are provided in the pump body and the pump cover, the water-cooling cavity cover is located in the mounting groove, a pressure plate is provided on the pump cover, the pressure plate is clamped in the annular groove 1, an annular groove 2 and annular groove 3 are provided on the water-cooling cavity cover, an O-shaped outer sealing ring is installed in the annular groove 2, and an O-shaped inner sealing ring is installed in the annular groove 3.

[0010] Preferably, threaded holes are provided on the pressure plate and the water-cooling chamber cover, screws are threadedly connected in the threaded holes, and spring washers are provided between the screws and the pressure plate.

[0011] Preferably, the pressing plate is fan-shaped.

[0012] The utility model discloses the following technical effects:

[0013] 1. The radially split heavy-duty petrochemical process pump with a special cavity structure provided by the utility model has a better cooling effect on the pump head compared with the bearing box cooling and the pump base foot cooling, and does not affect the arrangement of other cooling structures. The appropriate cooling structure can be selected and configured according to the working conditions, making the centrifugal pump more applicable to complex working conditions;

[0014] 2. The utility model provides a radially split heavy-station petrochemical process pump with a special cavity structure. Compared with the pump head insulation jacket, the structure design is simple and the cost is low. The design of the G-type annular cavity structure can not only cool the end face of the pump head and complement the insulation jacket to fill the blind area of ​​the jacket, but its unique annular structure completely wraps the sealing cavity on both sides of the pump, which can directly cool / insulate the sealing cavity, and has a better effect on protecting the mechanical seal, greatly extending the service life of the mechanical seal. In this way, it can be used alone to cope with some common high-temperature working conditions, and can also be used in conjunction with the insulation jacket to form full coverage cooling / insulation of the pump head to cope with more complex special working conditions, forming a high-low combination.

[0015] In summary, the technical solution of the utility model solves the problems in the prior art that the cooling effect of the bearing box cooling and the pump base support foot cooling on the pump head is poor, the design of the insulation jacket is complex and costly, and there are blind spots in coverage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 for Figure 1 A partial enlarged view of middle I;

[0019] Figure 3 This is a cross-sectional view of the water-cooling chamber cover of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the pressing plate of the utility model;

[0021] Among them, 1. Pump cover; 2. Pump body; 3. Water-cooling chamber cover; 4. O-ring outer seal; 5. Pressure plate; 6. O-ring inner seal; 7. Screws; 8. Spring washers; 9. Water-cooling interface; 10. G-type annular chamber. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Reference Figure 1-4 The utility model provides a radially split heavy-station petrochemical process pump with a special cavity structure, comprising:

[0025] The pump body 2 and the pump cover 1 are fixedly connected, and a G-type annular cavity 10 is provided in the pump body 2 and the pump cover 1. A plurality of water-cooling interfaces 9 are provided on the pump body 2 and the pump cover 1. The water-cooling interface 9 is communicated with the G-type annular cavity 10. A water-cooling cavity cover 3 is provided on the G-type annular cavity 10. A mounting groove and an annular groove 1 are provided in the pump body 2 and the pump cover 1. The water-cooling cavity cover 3 is located in the mounting groove. A pressure plate 5 is provided on the pump cover 1. The pressure plate 5 is clamped in the annular groove 1. An annular groove 2 and an annular groove 3 are provided on the water-cooling cavity cover 3. An O-shaped outer sealing ring 4 is installed in the annular groove 2, and an O-shaped inner sealing ring 6 is installed in the annular groove 3.

[0026] In the present device, the pump body 2 and the pump cover 1 are both provided with a plurality of water-cooling interfaces 9. In the present embodiment, the water-cooling interfaces 9 are preferably arranged symmetrically up and down for easy circulation and exhaust. The pressure plate 5 is inserted into the annular groove 1 to fix the water-cooling cover plate 3. The O-shaped outer sealing ring 4 and the O-shaped inner sealing ring 6 improve the sealing performance of the water-cooling cavity cover 3. The G-shaped annular cavity 10 and the water-cooling cavity cover 3 form a water-cooling cavity, which can effectively cool down and protect the parts of the pump and the mechanical sealing cavity. When the medium needs to be kept warm, it can also serve as a heat-insulating jacket for the medium, filling the blind spot of the end face heat-insulating coverage of the normal jacket design, so that the centrifugal pump is better suitable for high temperature and complex working conditions.

[0027] According to a further optimization scheme, threaded holes are provided on the pressure plate 5 and the water-cooling chamber cover 3 , screws 7 are threadedly connected in the threaded holes, and spring washers 8 are provided between the screws 7 and the pressure plate 5 .

[0028] The pressure plate 5 is fixed to the water-cooling chamber cover 3 by screws 7. The fixing design of the water-cooling chamber cover 3 and the pressure plate 5 combined with the screws 7 and the spring washers 8 has a simple structure and is easy to disassemble and maintain. The water-cooling chamber cover 3 can be disassembled and assembled without disassembling the mechanical seal, and the water-cooling chamber can be flushed and maintained.

[0029] According to a further optimized solution, the pressing plate 5 is fan-shaped.

[0030] The pressure plate 5 has a sector-shaped profile and a fixed thickness. Its profile and thickness are coordinated with the annular grooves of the pump body 2 and the pump cover 1. With good preliminary design planning, a single-specification pressure plate 5 can be inserted into the annular grooves of the pump body 2 / pump cover 1 of different sizes, thereby improving versatility, reducing inventory, and saving costs.

[0031] In this embodiment, the pump cover 1 can also be pressure tested by using the G-shaped annular cavity 10 alone after the rough machining of the casting in the early stage, so as to detect the casting defects in advance and repair them, thereby avoiding welding deformation after fine machining.

[0032] The O-shaped outer sealing ring 4 and the O-shaped inner sealing ring 6 can be made of different materials according to different conditions of the circulating medium on site, and have strong versatility and are easy to purchase and replace.

[0033] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A radially split heavy-station petrochemical process pump with a special cavity structure, characterized in that: include: A pump body (2) and a pump cover (1), wherein the pump body (2) and the pump cover (1) are fixedly connected, wherein the pump body (2) and the pump cover (1) are both provided with a G-type annular cavity (10), wherein the pump body (2) and the pump cover (1) are both provided with a plurality of water cooling interfaces (9), wherein the water cooling interfaces (9) are communicated with the G-type annular cavity (10), wherein a water cooling cavity cover (3) is provided on the G-type annular cavity (10), wherein the pump body (2) and the pump cover (1) are both provided with a mounting groove and an annular groove 1, wherein the water cooling cavity cover (3) is located in the mounting groove, wherein a pressure plate (5) is provided on the pump cover (1), wherein the pressure plate (5) is clamped in the annular groove 1, wherein the water cooling cavity cover (3) is provided with an annular groove 2 and an annular groove 3, wherein an O-shaped outer sealing ring (4) is installed in the annular groove 2, and an O-shaped inner sealing ring (6) is installed in the annular groove 3.

2. A radially split heavy-station petrochemical process pump with a special cavity structure according to claim 1, characterized in that: The pressing plate (5) and the water-cooling chamber cover (3) are both provided with threaded holes, screws (7) are threadedly connected in the threaded holes, and a spring washer (8) is provided between the screws (7) and the pressing plate (5).

3. The radially split heavy-station petrochemical process pump with a special cavity structure according to claim 1, characterized in that: The pressing plate (5) is fan-shaped.

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