Casing for counter flow cooling Roots blower

Abstract

The utility model provides a casing for a countercurrent cooling Roots blower, which solves the technical problems that sand in a process hole of the existing casing is difficult to clean, the process hole is time-consuming to process, the space of an inner cavity of a countercurrent air inlet is high in casting difficulty, the countercurrent air inlet is difficult to realize standardization and the like, and is provided with a base which is upwards and adjacently provided with an air outlet part; the air outlet part is upwards and adjacently provided with a shell middle part, and the shell middle part is upwards and adjacently provided with an air inlet part; the air inlet part comprises an air inlet end, a left countercurrent air inlet end and a right countercurrent air inlet end, the air inlet end is located in the middle of the air inlet part, the left countercurrent air inlet end and the right countercurrent air inlet end are located on the two sides of the air inlet part respectively, the left countercurrent air inlet end comprises a left countercurrent air inlet cavity, and the right countercurrent air inlet end comprises a right countercurrent air inlet cavity; the size of the outermost side of the inner cavity space of the machine shell is the same as the inner size, sand cleaning is convenient, the casting difficulty is low, the casting manufacturability is good, the reverse flow air inlet connector specification is uniform, and standardization can be achieved conveniently. The Roots blower can be widely applied to Roots blowers.

Description

Technical Field

[0001] The utility model relates to a casing for a Roots blower, in particular to a casing for a counter-current cooling Roots blower. Background Art

[0002] Roots blower is a positive displacement rotary blower that uses two or three blade-shaped rotors to make relative motion in the cylinder to compress and transport gas. It has a simple structure and is easy to manufacture. It is suitable for gas transportation and pressurization in low-pressure situations and can also be used as a vacuum pump.

[0003] The casing of the Roots blower is the main component of the Roots blower. When it is working, it takes a part of the blower outlet gas and uses the cooler, which is generally a separate supporting equipment, to cool it down. Then, the cooler returns to the blower inlet through the countercurrent air inlet to balance and buffer the pressure difference between the inlet and exhaust ports, reduce the temperature, and achieve a higher outlet pressure.

[0004] The counterflow air inlet on the existing Roots blower casing is provided with an inner cavity space, and the size of the outermost hole is smaller than that of the inner one. Such a structure is difficult to cast and has poor casting processability. The counterflow air inlet of most Roots blower-specific casings is a small round hole, and two process holes need to be reserved on both sides of the casing. Such a structure leads to technical problems such as inconvenient sand cleaning and incomplete cleaning. The process holes also need to be drilled, and during assembly, the outermost holes need to be sealed with a blocking plate, which increases the processing cost.

[0005] At the same time, the specifications of the counterflow air inlet interfaces on the existing casings are not uniform. The same model may produce multiple casing models due to the differences in specifications of the counterflow air inlets, which cannot be standardized. This increases the need to stock multiple specifications during mass production, which increases manufacturing costs. Utility Model Content

[0006] The utility model aims to solve the technical problems that the process holes of the existing casing are difficult to clean with sand, the processing of the process holes is time-consuming, the inner cavity space of the countercurrent air inlet is difficult to cast, and the specifications of the countercurrent air inlet are difficult to standardize. A casing for a countercurrent cooling Roots blower is provided. The outermost size of the inner cavity space of the casing for the countercurrent cooling Roots blower is the same as the inner size, the sand cleaning is convenient, the casting difficulty is low, the casting processability is good, no process holes need to be reserved during casting, and the sand cleaning is convenient after the casting is completed. At the same time, the specifications of the countercurrent air inlet interfaces are unified, which facilitates the standardization of casing models and reduces manufacturing costs.

[0007] To this end, the technical solution of the utility model is a casing for a countercurrent cooling Roots blower, which is provided with a base, an air outlet is provided upwardly and adjacently to the base, a casing middle part is provided upwardly and adjacently to the air outlet, and an air inlet is provided upwardly and adjacently to the casing middle part;

[0008] The air intake portion includes an air intake end, a left countercurrent air intake end, and a right countercurrent air intake end. The air intake end is located in the middle of the air intake portion. The left countercurrent air intake end and the right countercurrent air intake end are respectively located on both sides of the air intake portion. The left countercurrent air intake end includes a left countercurrent air intake cavity, and the right countercurrent air intake end includes a right countercurrent air intake cavity.

[0009] The outer sides of the left countercurrent air inlet cavity and the right countercurrent air inlet cavity are respectively provided with open countercurrent air inlets, the inner cavity size of the left countercurrent air inlet cavity is consistent with the size of the open countercurrent air inlet, the inner cavity size of the right countercurrent air inlet cavity is consistent with the size of the open countercurrent air inlet, and the open countercurrent air inlet is an open large square hole;

[0010] The left countercurrent air inlet cavity and the right countercurrent air inlet cavity are provided with built-in countercurrent reflux holes, which are located on the bottom inner walls of the left countercurrent air inlet cavity and the right countercurrent air inlet cavity;

[0011] The air inlet end includes an air inlet and a connecting protrusion, the air inlet is located on the upper side of the air inlet end, and the connecting protrusion is located on the outside of the air inlet end; the outside of the left countercurrent air inlet end is provided with a left countercurrent air inlet end connecting flange, and the outside of the right countercurrent air inlet end is provided with a right countercurrent air inlet end connecting flange; the air outlet portion includes an air outlet end and an air outlet, the air outlet end and the air outlet are connected, and the air outlet is located on the outside of the air outlet portion; the middle portion of the casing includes an intermediate shell and a working chamber, and the working chamber is located in the middle position of the middle portion of the casing; the air inlet, the air inlet end, the working chamber, the air outlet end and the air outlet are connected to each other.

[0012] Preferably, reinforcing ribs are provided on the outer circumference of the outer wall of the intermediate shell, and the reinforcing ribs are located at both ends of the middle part of the shell.

[0013] Preferably, the built-in counterflow reflow hole is located at the junction of the bottom inner walls of the left counterflow air inlet cavity and the right counterflow air inlet cavity, and is provided with rounded corners.

[0014] Preferably, the size of the built-in countercurrent reflux hole is 140 mm ± 2 mm in length and 30 mm ± 2 mm in width.

[0015] Preferably, the dimensions of the left countercurrent air inlet end connecting flange and the right countercurrent air inlet end connecting flange are 390 mm±2 mm in length and 250 mm±2 mm in width.

[0016] The beneficial technical effect of the utility model is that, since a built-in countercurrent reflux hole is provided at the junction of the bottom inner walls of the left countercurrent air inlet cavity and the right countercurrent air inlet cavity, the gas discharged from the air outlet can be introduced into the interior of the casing through a dedicated pipeline for countercurrent cooling, and the dedicated pipeline can be connected to an external cooler for cooling; the built-in countercurrent reflux hole is provided with a rounded corner, and the cooling gas can pass through the rounded corner smoothly during cooling, with low resistance and high flow efficiency.

[0017] Furthermore, since open countercurrent air inlets are respectively provided on the outer sides of the left countercurrent air inlet cavity and the right countercurrent air inlet cavity, the open countercurrent air inlets are large open square holes that are connected to the outside world, have low casting difficulty, are convenient for sand cleaning, and have good casting processability; at the same time, the open large square holes do not need to be sealed with blocking plates when the fan is installed, which reduces processing workload and improves efficiency.

[0018] The sizes of the left countercurrent air inlet end connecting flange and the right countercurrent air inlet end connecting flange can be set to standard flange sizes, and can connect pipelines of the same type and multiple specifications, which is convenient for standardization, reduces non-standard sizes, reduces costs, and reduces housing inventory. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the utility model;

[0020] Figure 2 Yes is the main view;

[0021] Figure 3 It is a side view;

[0022] Figure 4 This is another side view;

[0023] Figure 5 yes Figure 4 AA section view;

[0024] Figure 6 yes Figure 5 GG cross-sectional view;

[0025] Figure 7 yes Figure 5 H-direction view.

[0026] Explanation of symbols in the figure:

[0027] 1. Air inlet; 101. Air inlet end; 10101. Air inlet port; 10102. Connecting protrusion; 102. Left countercurrent air inlet end; 10201. Left countercurrent air inlet cavity; 10202. Left countercurrent air inlet end connecting flange; 103. Right countercurrent air inlet end; 10301. Right countercurrent air inlet cavity; 10302. Right countercurrent air inlet end connecting flange; 104. Built-in countercurrent return hole; 10401. Rounded corner; 105. Open countercurrent air inlet port; 2. Air outlet; 201. Air outlet end; 202. Air outlet port; 3. Middle part of the casing; 301. Intermediate casing; 302. Working chamber; 303. Reinforcement ribs; 4. Base. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with embodiments.

[0029] Figure 1-Figure 7It is a schematic diagram of an embodiment of the utility model. In the figure, it can be seen that a casing for a countercurrent cooling Roots blower is provided with a base 4, an air outlet portion 2 is provided adjacent to the base 4 upward, a casing middle portion 3 is provided adjacent to the air outlet portion 2 upward, and an air inlet portion 1 is provided adjacent to the casing middle portion 3 upward.

[0030] Figure 1 It can be seen that the air intake portion 1 includes an air intake end 101, a left countercurrent air intake end 102, and a right countercurrent air intake end 103. The air intake end 101 is located in the middle part of the air intake portion 1, and the left countercurrent air intake end 102 and the right countercurrent air intake end 103 are respectively located on both sides of the air intake portion 1. The left countercurrent air intake end 102 includes a left countercurrent air intake cavity 10201, and the right countercurrent air intake end 103 includes a right countercurrent air intake cavity 10301.

[0031] Figure 1 and Figure 5 It can be seen that the outer sides of the left countercurrent air inlet cavity 10201 and the right countercurrent air inlet cavity 10301 are respectively provided with open countercurrent air inlets 105, the inner cavity size of the left countercurrent air inlet cavity 10201 is consistent with the size of the open countercurrent air inlet 105, and the inner cavity size of the right countercurrent air inlet cavity 10301 is consistent with the size of the open countercurrent air inlet 105, and the open countercurrent air inlet 105 is a large open square hole; since the outer sides of the left countercurrent air inlet cavity 10201 and the right countercurrent air inlet cavity 10301 are respectively provided with open countercurrent air inlets 105, the open countercurrent air inlet 105 is a large open square hole, which is connected to the outside, has low casting difficulty, is convenient for sand cleaning, and has good casting processability; at the same time, the open large square hole does not need to be blocked with a blocking plate when the fan is installed, which reduces the processing workload and improves the efficiency.

[0032] Built-in countercurrent return holes 104 are provided inside the left countercurrent air inlet cavity 10201 and the right countercurrent air inlet cavity 10301 . The built-in countercurrent return holes 104 are located on the bottom inner walls of the left countercurrent air inlet cavity 10201 and the right countercurrent air inlet cavity 10301 .

[0033] The air inlet end 101 includes an air inlet 10101 and a connecting protrusion 10102, the air inlet 10101 is located on the upper side of the air inlet end 101, and the connecting protrusion 10102 is located on the outside of the air inlet end 101; the outside of the left countercurrent air inlet end 102 is provided with a left countercurrent air inlet end connecting flange 10202, and the outside of the right countercurrent air inlet end 103 is provided with a right countercurrent air inlet end connecting flange 10302; the air outlet portion 2 includes an air outlet end 201 and an air outlet 202, the air outlet end 201 and the air outlet 202 are connected, and the air outlet 202 is located on the outside of the air outlet portion 2; the middle portion 3 of the casing includes an intermediate shell 301 and a working chamber 302, and the working chamber 302 is located in the middle position of the middle portion 3 of the casing; the air inlet 10101, the air inlet end 101, the working chamber 302, the air outlet end 201 and the air outlet 202 are connected to each other.

[0034] Figure 1 It can be seen that reinforcing ribs 303 are provided on the outer circumference of the outer wall of the intermediate shell 301, and the reinforcing ribs 303 are located at both ends of the middle part 3 of the casing; the built-in countercurrent return hole 104 is located at the intersection of the bottom inner walls of the left countercurrent air inlet cavity 10201 and the right countercurrent air inlet cavity 10301. Since it is located at the intersection of the bottom inner walls of the left countercurrent air inlet cavity 10201 and the right countercurrent air inlet cavity 10301, a built-in countercurrent return hole 104 is provided, and the gas discharged from the air outlet 2 can be introduced into the casing through a dedicated pipeline for countercurrent cooling. For example, the discharged gas is cooled by a cooler and then enters the casing after cooling to cool the equipment. The dedicated pipeline can be connected to an external cooler for cooling; the built-in countercurrent return hole 104 is provided with a rounded corner 10401, and the cooling gas passes through the rounded corner 10401 smoothly during cooling, with low resistance and high flow efficiency.

[0035] In this embodiment, the built-in countercurrent reflow hole 104 is located at the intersection of the bottom inner walls of the left countercurrent air inlet cavity 10201 and the right countercurrent air inlet cavity 10301, and is provided with rounded corners 10401. When the gas flows back here, it is smoother, avoiding the impact and rebound of the cooling airflow, and reducing the noise of the cooling airflow.

[0036] In the technical solution of this embodiment, the dimensions of the built-in countercurrent return hole 104 are 140 mm long and 30 mm wide, and the tolerances of the length and width are generally selected to be ±2 mm to ensure consistency; the dimensions of the left countercurrent air inlet end connecting flange 10202 and the right countercurrent air inlet end connecting flange 10302 are 390 mm long and 250 mm wide; the tolerances of the length and width are generally selected to be ±2 mm to ensure consistency; the dimensions of the left countercurrent air inlet end connecting flange 10202 and the right countercurrent air inlet end connecting flange 10302 can be set to standard flange dimensions, and can be connected to pipelines of the same type and multiple specifications, which is convenient for standardization, reduces non-standard dimensions, reduces costs, and reduces casing inventory.

[0037] The technical solution of the present embodiment provides a casing for a countercurrent cooling Roots blower, in which the outermost dimension of the inner cavity space of the casing for the countercurrent cooling Roots blower is the same as the inner dimension, sand cleaning is convenient, casting difficulty is low, casting processability is good, no process holes need to be reserved during casting, and sand cleaning is convenient after casting. At the same time, the specifications of the countercurrent air inlet interface are unified, which facilitates the standardization of casing models and reduces manufacturing costs.

[0038] However, what is described above is only a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A housing for a countercurrent cooling Roots blower, characterized in that: A base is provided, an air outlet is provided upwardly and adjacently to the base, a housing middle portion is provided upwardly and adjacently to the air outlet, and an air inlet is provided upwardly and adjacently to the housing middle portion; The air inlet portion includes an air inlet end, a left countercurrent air inlet end, and a right countercurrent air inlet end. The air inlet end is located in the middle of the air inlet portion. The left countercurrent air inlet end and the right countercurrent air inlet end are respectively located on both sides of the air inlet portion. The left countercurrent air inlet end includes a left countercurrent air inlet cavity, and the right countercurrent air inlet end includes a right countercurrent air inlet cavity. The outer sides of the left countercurrent air inlet cavity and the right countercurrent air inlet cavity are respectively provided with open countercurrent air inlets, the inner cavity size of the left countercurrent air inlet cavity is consistent with the size of the open countercurrent air inlet, the inner cavity size of the right countercurrent air inlet cavity is consistent with the size of the open countercurrent air inlet, and the open countercurrent air inlet is an open large square hole; The left countercurrent air inlet cavity and the right countercurrent air inlet cavity are provided with built-in countercurrent reflux holes inside, and the built-in countercurrent reflux holes are located on the bottom inner walls of the left countercurrent air inlet cavity and the right countercurrent air inlet cavity; The air inlet end includes an air inlet and a connecting protrusion, the air inlet is located on the upper side of the air inlet end, and the connecting protrusion is located on the outside of the air inlet end; the outside of the left countercurrent air inlet end is provided with a left countercurrent air inlet end connecting flange, and the outside of the right countercurrent air inlet end is provided with a right countercurrent air inlet end connecting flange; the air outlet portion includes an air outlet end and an air outlet, the air outlet end and the air outlet are connected, and the air outlet is located on the outside of the air outlet portion; the middle portion of the casing includes an intermediate shell and a working chamber, and the working chamber is located in the middle position of the middle portion of the casing; the air inlet, air inlet end, working chamber, air outlet end and air outlet are connected to each other.

2. The housing for a counter-flow cooling Roots blower according to claim 1, characterized in that: Reinforcing ribs are arranged on the outer circumference of the outer wall of the intermediate shell.

3. The housing for a counter-flow cooling Roots blower according to claim 1, characterized in that: The built-in counterflow reflux hole is located at the intersection of the bottom inner walls of the left counterflow air inlet cavity and the right counterflow air inlet cavity, and is provided with rounded corners.

4. The housing for a counter-flow cooling Roots blower according to claim 1, characterized in that: The dimensions of the built-in countercurrent reflux hole are 140 mm ± 2 mm in length and 30 mm ± 2 mm in width.

5. The housing for a counter-flow cooling Roots blower according to claim 1, characterized in that: The dimensions of the left countercurrent air inlet end connecting flange and the right countercurrent air inlet end connecting flange are 390 mm±2 mm in length and 250 mm±2 mm in width.

Images