A stainless steel double-row cylinder welding structure

Abstract

The present invention discloses a stainless steel double-row cylinder welding structure, which comprises: a primary inner cylinder barrel and a secondary inner cylinder barrel connected together by a middle partition plate, and comprises an air cavity for cooling the primary inner cylinder barrel and the secondary inner cylinder barrel respectively, and a water cavity circulating outside the primary inner cylinder barrel and the secondary inner cylinder barrel. By designing the cylinder body into a simple double-row cylinder body structure, waste of casting cylinder bodies can be avoided, the cylinder body manufacturing time can be shortened, the use of raw materials can be saved, and resources can be saved. Compared with the existing single piece costing more than one million, a single piece can save hundreds of thousands, thereby reducing operating costs.

Description

Technical Field

[0001] The invention relates to the field of compressors, in particular to a stainless steel double-row cylinder welding structure. Background Art

[0002] With the continuous improvement of production technology, the types of compressors used in the coal chemical industry have shown diversified development. Among them, the role of labyrinth compressors in the coal chemical industry has become increasingly prominent. In particular, the production and manufacturing of double-row cylinders of labyrinth compressors for BOG low-temperature media are challenging. The original general cylinder manufacturing process generally uses gray cast iron and ductile iron, and is manufactured by casting. However, there are the following disadvantages: under equal strength, the product weight is large, which wastes materials; molds need to be made, which is not suitable for single-piece production; the double-row cylinder structure is complex, the casting process is difficult to formulate, and the yield is only about 30%; it is not resistant to low temperatures (minus 80°C) and corrosive gases. If cast stainless steel is used for casting. Stainless steel has poor casting performance and poor fluidity, and is prone to shrinkage, shrinkage, pores and cracks. The yield is only about 10%, and stainless steel casting is not suitable. Therefore, being able to better produce double-row cylinders that can withstand low temperatures has become a top priority in the manufacture of labyrinth compressors.

[0003] Since the traditional cylinder design and manufacturing process basically adopts casting, it is necessary to produce molds and sand molds, which has a long production cycle and high costs. In addition, the double-row cylinder structure is relatively complex. Cast stainless steel casting has poor fluidity and a very high scrap rate. In addition, stainless steel casting cylinders are prone to defects, which may lead to instability in future operation and maintenance. If the cylinder has shrinkage holes, looseness, cracks and other defects, there may be gas leakage during operation. Once a leak occurs, the entire intermediate production link will be interrupted, resulting in the scrapping of materials, increasing the operating costs of the enterprise, and may also cause safety accidents such as explosions and poisoning. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to solve the shortcomings of the prior art and provide a stainless steel double-row cylinder welding structure. The cylinder is designed into a simple double-row cylinder structure to avoid casting cylinder waste, shorten the cylinder manufacturing time, save the use of raw materials, and save resources. Compared with the existing single piece costing more than one million, a single piece can save hundreds of thousands, reducing operating costs.

[0005] Technical solution: In order to achieve the above purpose, the present invention discloses a stainless steel double-row cylinder welding structure, which comprises: a primary inner cylinder barrel and a secondary inner cylinder barrel connected together by a middle partition plate, which comprises an air cavity for cooling the primary inner cylinder barrel and the secondary inner cylinder barrel respectively, and a water cavity circulating outside the primary inner cylinder barrel and the secondary inner cylinder barrel;

[0006] The cooling process of the air cavity includes cooling gas entering the first inner cylinder and the second inner cylinder from the first inlet flange and the second inlet flange installed on the first outer ring and the second outer ring, respectively, and then being discharged from the first exhaust flange and the second exhaust flange, respectively;

[0007] The cooling process of the water cavity includes cooling water entering the outer ring of the primary water cavity from the cooling water inlet pipe and then entering the outer ring of the secondary water cavity through the partition. After the cooling water fills the outer ring of the secondary water cavity, it comes out from the partition and finally enters the outer ring of the primary water cavity and is discharged from the cooling water outlet pipe.

[0008] As a further preferred embodiment of the present invention, the air cavity includes a primary air cavity and a secondary air cavity, and the primary air cavity includes: after the cooling gas enters the primary air inlet valve flange fixed on the primary inner cylinder from the primary air inlet flange installed on the primary outer ring, it reaches the primary inner cylinder and is cooled, and then passes through the primary exhaust valve flange fixed on the primary inner cylinder and is discharged from the primary exhaust port flange installed on the primary outer ring; the secondary air cavity includes: after the cooling gas enters the secondary air inlet valve flange fixed on the secondary inner cylinder from the secondary air inlet flange installed on the secondary outer ring, it reaches the secondary inner cylinder and is cooled, and then passes through the secondary exhaust valve flange fixed on the secondary inner cylinder and is discharged from the secondary exhaust port flange installed on the secondary outer ring.

[0009] As a further preferred embodiment of the present invention, the water chamber includes a cooling water inlet pipe, a first-level water chamber left baffle, a first-level water chamber right baffle, a first-level water chamber outer ring, a baffle, a second-level water chamber outer ring, a second-level water chamber left cover plate, a second-level water chamber right cover plate and a cooling water outlet pipe, a left baffle is provided between the cooling water inlet pipe and the cooling water outlet pipe, the first-level water chamber left baffle and the first-level water chamber right baffle weld the first-level water chamber outer ring in the middle of the first-level inner cylinder and the first-level outer ring, the second-level water chamber left cover plate and the second-level water chamber right cover plate weld the second-level water chamber outer ring in the middle of the second-level inner cylinder and the second-level outer ring, and a baffle is provided in the middle of the first-level outer ring and the second-level outer ring.

[0010] As a further preferred embodiment of the present invention, a through hole is provided at the connection between the outer ring of the first-level water chamber and the left partition plate of the first-level water chamber and the right partition plate of the first-level water chamber, a through hole is provided at the connection between the secondary outer ring and the left cover plate of the secondary water chamber and the right cover plate of the secondary water chamber, and a through hole is provided on the partition in the middle of the first-level outer ring and the secondary outer ring.

[0011] As a further preferred embodiment of the present invention, the outer ring of the primary water chamber and the outer ring of the secondary water chamber are respectively welded to the rotating surfaces outside the primary inner cylinder and the secondary inner cylinder.

[0012] As a further preferred embodiment of the present invention, the outer surfaces of the primary water cavity outer ring and the secondary water cavity outer ring are respectively surfaces of revolution.

[0013] As a further preferred embodiment of the present invention, the installation height of the cooling water outlet pipe is higher than that of the cooling water inlet pipe, and a pressure difference is caused between the cooling water inlet pipe located below and the cooling water outlet pipe and outlet located above, thereby improving the heat exchange efficiency.

[0014] As a further preferred embodiment of the present invention, a left partition provided in the middle of the cooling water inlet pipe and the cooling water outlet pipe connects the first-level inner cylinder and the first-level outer ring together. By providing the left partition in the middle of the first-level inner cylinder and the first-level outer ring, the cooling water coming in from the cooling water inlet pipe and the cooling water to be discharged from the cooling water outlet pipe are separated.

[0015] Beneficial effects: Compared with the prior art, the stainless steel double-row cylinder welding structure of the present invention has the following advantages:

[0016] 1. Due to the use of welding structure, the process of manufacturing molds and sand molds is omitted, and rolled steel plates are directly used for welding, which avoids casting cylinder waste and shortens the cylinder manufacturing time;

[0017] 2. The cylinder body adopts a two-layer structure, the water chamber is designed separately, and the advanced welding technology and simple structure are used to meet the production and use requirements, saving the use of raw materials and resources;

[0018] 3. The manufacturing cost of the double-row stainless steel welded cylinder body is about 300,000 yuan. Compared with the existing single-piece cost of more than 1 million yuan, each piece can save hundreds of thousands of yuan, which can greatly reduce the operating costs for manufacturers every year. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of the present invention;

[0020] Figure 2 It is a schematic diagram of the trajectory of the cooling gas in the secondary inner cylinder;

[0021] Figure 3 A partial cross-sectional view of a top view of the present invention;

[0022] Figure 4 It is a schematic diagram of the cooling trajectory of cooling water;

[0023] Figure 5 This is the right side view of the full section of the first-stage inner cylinder. DETAILED DESCRIPTION

[0024] The present invention will be further explained below in conjunction with the accompanying drawings.

[0025] As shown in the accompanying drawings, the stainless steel double-row cylinder body welding structure described in the present invention includes: an air cavity for cooling the primary inner cylinder 6 and the secondary inner cylinder 13 respectively, and a water cavity circulating outside the primary inner cylinder 6 and the secondary inner cylinder 13.

[0026] Example

[0027] When the primary inner cylinder 6 and the secondary inner cylinder 13 need to be cooled, the cooling gas enters the primary intake valve flange 32 fixed on the primary inner cylinder 6 from the primary intake port flange 4 installed on the primary outer ring 7, reaches the primary inner cylinder 6 and cools it, and then passes through the primary exhaust valve flange 31 fixed on the primary inner cylinder 6 and is discharged from the primary exhaust port flange 1 installed on the primary outer ring 7;

[0028] At the same time, the cooling gas enters the secondary intake valve flange 25 fixed on the secondary inner cylinder 13 from the secondary intake port flange 11 installed on the secondary outer ring 33, reaches the secondary inner cylinder 13 and is cooled, and then passes through the secondary exhaust valve flange 26 fixed on the secondary inner cylinder 13 and is discharged from the secondary exhaust port flange 19 installed on the secondary outer ring 33;

[0029] In order to improve the cooling efficiency of the cooling gas, the cooling water enters from the cooling water inlet pipe 2, passes through the left partition plate 23 of the first-level water chamber, enters the first-level inner cylinder 6 and the inner side of the first-level water chamber outer ring 5, and then passes through the left partition plate 23 of the first-level water chamber, the partition plate 20 and the left cover plate 17 of the second-level water chamber in turn, enters the inner side of the second-level inner cylinder 13 and the outer side of the second-level water chamber 12, and then passes through the left cover plate 17 of the second-level water chamber and the right cover plate 34 of the second-level water chamber, and enters the inner side of the second-level inner cylinder 13 and the outer side of the second-level water chamber 12 again to cool the second-level inner cylinder 13. The cooling water passes through the right cover plate 34 of the second-level water chamber, the partition plate 20 and the right partition plate 9 of the first-level water chamber in turn, enters the first-level inner cylinder 6 and the inner side of the first-level water chamber outer ring 5 to cool the first-level inner cylinder 6. The cooling water finally comes out of the right partition plate 9 of the first-level water chamber and is discharged through the cooling water outlet pipe 3.

[0030] The first-stage intake valve cover flange 8, the second-stage intake valve cover flange 14, the second-stage exhaust valve cover flange 18, and the first-stage exhaust valve cover flange 22 are sealed through the valve cover, and the first-stage cylinder head end flange 24 and the first- and second-stage cylinder seat end flanges 28 are respectively installed with the first-stage cylinder head end flange 29 and the cylinder seat.

[0031] The height of the cooling water inlet pipe 2 located below is higher than the cooling water outlet pipe 3 located above, resulting in a pressure difference, thereby improving the heat exchange efficiency.

[0032] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable technicians familiar with the technical field to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A stainless steel double-row cylinder welding structure, comprising: A primary inner cylinder (6) and a secondary inner cylinder (13) connected together by a middle partition (10), characterized in that they include an air cavity for cooling the primary inner cylinder (6) and the secondary inner cylinder (13) respectively, and a water cavity circulating outside the primary inner cylinder (6) and the secondary inner cylinder (13); The cooling process of the air cavity comprises cooling gas entering the first inner cylinder barrel (6) and the second inner cylinder barrel (13) from the first air inlet flange (4) and the second air inlet flange (11) respectively mounted on the first outer ring (7) and the second outer ring (33), and then being discharged from the first exhaust flange (1) and the second exhaust flange (19) respectively; The cooling process of the water cavity comprises cooling water entering the outer ring (5) of the primary water cavity from the cooling water inlet pipe (2) and then passing through the partition (20) to enter the outer ring (12) of the secondary water cavity; the cooling water fills the outer ring (12) of the secondary water cavity and then comes out from the partition (20), finally enters the outer ring (5) of the primary water cavity and is discharged from the cooling water outlet pipe (3); The air cavity comprises a primary air cavity and a secondary air cavity. The primary air cavity comprises: cooling gas enters a primary air inlet flange (4) mounted on a primary outer ring (7) into a primary air inlet valve flange (32) fixed on a primary inner cylinder barrel (6), reaches the primary inner cylinder barrel (6) and is cooled, and then passes through a primary exhaust valve flange (31) fixed on the primary inner cylinder barrel (6) and is discharged from a primary exhaust port flange (1) mounted on the primary outer ring (7); the secondary air cavity comprises: cooling gas enters a secondary air inlet valve flange (25) fixed on a secondary inner cylinder barrel (13) from a secondary air inlet flange (11) mounted on a secondary outer ring (33), reaches the secondary inner cylinder barrel (13) and is cooled, and then passes through a secondary exhaust valve flange (26) fixed on the secondary inner cylinder barrel (13) and is discharged from a secondary exhaust port flange (19) mounted on the secondary outer ring (33); The water chamber comprises a cooling water inlet pipe (2), a first-level water chamber left baffle (23), a first-level water chamber right baffle (9), a first-level water chamber outer ring (5), a baffle (20), a second-level water chamber outer ring (12), a second-level water chamber left cover plate (17), a second-level water chamber right cover plate (34) and a cooling water outlet pipe (3). A left baffle plate (30) is provided between the cooling water inlet pipe (2) and the cooling water outlet pipe (3). The first-level water chamber left baffle plate (23) and the first-level water chamber right baffle plate (9) weld the first-level water chamber outer ring (5) to the middle of the first-level inner cylinder (6) and the first-level outer ring (7). The second-level water chamber left cover plate (17) and the second-level water chamber right cover plate (34) weld the second-level water chamber outer ring (12) to the middle of the second-level inner cylinder (13) and the second-level outer ring (33). A baffle plate (20) is provided to the middle of the first-level outer ring (7) and the second-level outer ring (33).

2. A stainless steel double-row cylinder welding structure according to claim 1, characterized in that: A through hole is provided at the connection between the primary water chamber outer ring (5) and the primary water chamber left baffle plate (23) and the primary water chamber right baffle plate (9); a through hole is provided at the connection between the secondary water chamber outer ring (33) and the secondary water chamber left cover plate (17) and the secondary water chamber right cover plate (34); and a through hole is provided on the baffle plate (20) in the middle of the primary outer ring (7) and the secondary outer ring (33).

3. A stainless steel double-row cylinder welding structure according to claim 2, characterized in that: The primary water chamber outer ring (5) and the secondary water chamber outer ring (12) are respectively welded to the outer rotating surfaces of the primary inner cylinder (6) and the secondary inner cylinder (13).

4. A stainless steel double-row cylinder welding structure according to claim 3, characterized in that: The outer surfaces of the primary water chamber outer ring (5) and the secondary water chamber outer ring (12) are respectively surfaces of revolution.

5. The stainless steel double-row cylinder welding structure according to claim 1 is characterized in that: The installation height of the cooling water outlet pipe (3) is higher than that of the cooling water inlet pipe (2).

6. A stainless steel double-row cylinder welding structure according to claim 1, characterized in that: A left partition plate (30) is provided between the cooling water inlet pipe (2) and the cooling water outlet pipe (3) to connect the first-stage inner cylinder (6) and the first-stage outer ring (7) together.

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