A cyclone aerodynamic variable underflow port

Abstract

The application provides a cyclone aerodynamic variable-diameter underflow port, which comprises a flange shell, an inner lining, an air bag, a spring, a connecting plate, a sliding ring, a hinge, a contraction petal, a connecting rod, an air pipe, a proportional valve and a baffle. The air bag, the connecting plate, the sliding ring, the hinge, the contraction petal and the connecting rod are connected from top to bottom. The spring is supported between the flange shell and the sliding ring. The air bag is supported between the connecting plate and the flange shell. The air pipe is connected between the air bag and the proportional valve. The baffle is fixed between the contraction petal joints. The proportional valve is used to adjust the air pressure change of the air bag to make the air bag expand and contract, so that the underflow port diameter is changed, and the flow control of the cyclone underflow port is realized. The device has the advantages of simple structure, linear adjustment range, high reliability, wear resistance and water resistance, and can meet the requirements of application in harsh environments.

Description

Technical Field

[0001] This invention relates to the field of hydrocyclone technology, and in particular to a hydrocyclone with a pneumatically variable diameter underflow outlet. Background Technology

[0002] Hydrocyclones are widely used separation and classification devices that can perform operations such as classifying and sorting solid particulate materials and concentrating slurries. When materials enter the flow field of a hydrocyclone, they undergo high-speed centrifugal spiral motion. Coarse particles are discharged from the underflow outlet, while fine particles are discharged from the overflow outlet, thus completing the separation of coarse and fine particles.

[0003] However, both theory and practice have shown a positive correlation between the underflow orifice diameter and the separation effect of existing hydrocyclones. Specifically, a larger underflow orifice increases the underflow rate and coarse particle content, while decreasing the overflow rate and coarse particle content; conversely, a smaller underflow orifice decreases the underflow rate and coarse particle content, while increasing the overflow rate and coarse particle content. To meet the varying requirements for the hydrocyclone underflow orifice diameter due to process changes, conventional methods require manual replacement of the underflow orifice with a suitable diameter. This method is time-consuming and has significant time constraints.

[0004] According to existing patent searches, the following patents are available: Yanzhou Coal Heze Energy Chemical Co., Ltd. has applied for an online adjustable underflow inlet and cyclone separator (patent number: CN202845198U); China University of Petroleum (East China); Nanjing Nisheng Industrial New Material Co., Ltd. has applied for a manually adjustable diameter cyclone separator bottom cone (patent number: CN2190157Y); Tianjin Meiteng Technology Co., Ltd. has applied for a rotary switching type online adjustable underflow inlet and cyclone separator (patent number: CN222369352U); Shandong University of Science and Technology has applied for an adjusting mechanism for the underflow inlet of a cyclone separator (patent number: CN221619766U). Some of these patents still require manual adjustment, while those with automatic adjustment suffer from drawbacks such as complex structure, high cost, heavy weight, and difficulty in maintenance. Summary of the Invention

[0005] To overcome the shortcomings of existing hydrocyclones where the underflow inlet cannot automatically change diameter and the diameter-changing device cannot work for extended periods in harsh environments such as underwater slurry, this invention proposes a pneumatically variable underflow inlet for hydrocyclones. This invention is not only simple in structure and does not change the main structure of existing hydrocyclones, but it is also easy to manufacture, install, and maintain. It has high reliability, wear resistance, and water resistance, meeting the requirements for applications in harsh environments.

[0006] A pneumatic variable diameter underflow port for a hydrocyclone, characterized in that it comprises: a flange shell (1), an inner liner (2), an air bladder (3), a spring (4), a connecting plate (5), a sliding ring (6), a hinge (7), a contraction valve (8), a connecting rod (9), an air pipe (10), a proportional valve (11), and a baffle (12).

[0007] The airbag (3), connecting plate (5), sliding ring (6), hinge (7), contraction valve (8), and connecting rod (9) are connected from top to bottom; The spring (4) is supported between the flange shell (1) and the sliding ring (6); The airbag (3) is supported between the connecting plate (5) and the flange shell (1); The connecting plate (5) is fixedly connected to the sliding ring (6); The contraction valve (8) is connected to the connecting rod (9) via a hinge (7); The trachea (10) is connected to the airbag (3) and the proportional valve (11); The baffle (12) is fixed between the seams of the contraction valve (8); A hydrocyclone pneumatic variable diameter underflow port, characterized in that: the spring (4) is supported between the flange shell (1) and the sliding ring (6) and is fixed to the flange shell (1) to push the sliding (6).

[0008] A hydrocyclone pneumatic variable diameter underflow port, characterized in that: the air bag (3) is supported between the connecting plate (5) and the flange shell (1), the air bag (3) is fixed to the flange shell (1), and pushes the connecting plate (5) and drives the sliding ring (6).

[0009] A hydrocyclone aerodynamic variable diameter underflow port, characterized in that: the contraction flap (8) is connected to the connecting rod (9) by a hinge (7), the connecting rod (9) is connected to the sliding ring (6) by a hinge, and the contraction flap (8) adjusts the underflow port diameter according to the up and down position of the sliding ring (6).

[0010] A pneumatic variable diameter underflow port for a cyclone separator, characterized in that: the air bladder (3) and the proportional valve (11) are connected and communicate with each other through an air pipe (10), and the proportional valve (11) can adjust the air pressure inside the air bladder (3) through the air pipe (10).

[0011] A cyclone aerodynamic variable diameter underflow port is characterized in that: the baffle (12) is fixed between the gaps of the contraction petals (8), and the baffle (12) moves according to the contraction or expansion action of the contraction petals (8) and is closely attached to the contraction petals (8). When the fluid flows through the underflow port, the baffle (12) prevents fluid leakage from the gaps between the contraction petals (8).

[0012] A pneumatic variable diameter underflow port for a cyclone separator, characterized in that: the diameter of the underflow port is linearly related to the air pressure inside the air bladder, and the proportionality coefficient k is selected based on the linear coefficient of air bladder expansion and the spring stiffness, ranging from 1mm / 0.05MP to 1mm / 0.2MP.

[0013] The beneficial effects of the present invention are as follows: The underflow port of the present invention realizes the automatic adjustment of the underflow port diameter through an air bladder, a proportional valve, a spring and a connecting rod mechanism. The opening and closing function of the multi-lobe structure of the underflow port is realized by the change of air pressure in the air bladder. The structure is simple, easy to manufacture and process, and is conducive to the one-time adjustment of the underflow port of a large batch of hydrocyclones, effectively reducing costs and making maintenance easy. Attached Figure Description

[0014] Figure 1 This is a structural diagram of a pneumatically variable diameter underflow port for a cyclone separator, provided by an example of the present invention. Figure 1 In the middle, there are flange shell (1), inner liner (2), air bag (3), spring (4), connecting plate (5), sliding ring (6), hinge (7), contraction valve (8), connecting rod (9), air pipe (10), proportional valve (11), and baffle (12).

[0015] Figure 2 This is a structural diagram of the pneumatic variable diameter underflow port of a cyclone separator provided in one embodiment of the present invention; Figure 2 In the middle, the baffle (12) Detailed Implementation

[0016] The present invention will be further described in detail with reference to the accompanying drawings.

[0017] like Figure 1 As shown, a hydrocyclone with a pneumatic variable diameter underflow outlet includes a flange shell (1), an inner liner (2), an air bladder (3), a spring (4), a connecting plate (5), a sliding ring (6), a hinge (7), a contraction flap (8), and a connecting rod (9); the connecting plate (5), the sliding ring (6), the hinge (7), the contraction flap (8), and the connecting rod (9) are connected from top to bottom; the spring (4) is supported between the flange shell (1) and the sliding ring (6); the air bladder (3) is supported between the connecting plate (5) and the flange shell (1). The spring (4) is supported between the flange shell (1) and the sliding ring (6) and is fixed to the flange shell (1), pushing the sliding (6). The airbag (3) is supported between the connecting plate (5) and the flange shell (1). The airbag (3) is fixed to the flange shell (1), pushing the connecting plate (5) and driving the sliding ring (6). The airbag (3) is connected to the proportional valve (11) through the air pipe (10). The proportional valve (11) can adjust the air pressure inside the airbag (3) through the air pipe (10), thereby controlling the expansion or contraction of the airbag (3). Since the inner and outer diameters of the airbag (3) are restricted, the airbag (3) can only deform from the top and bottom, thereby controlling the lifting or lowering of the sliding ring (6).

[0018] like Figure 2As shown, the baffle (12) is fixed between the gaps of the contraction valve (8), and the baffle (12) moves in accordance with the contraction or expansion action of the contraction valve (8) and is close to the contraction valve (8). When the fluid flows through the bottom outlet, the baffle (12) prevents fluid leakage from the gaps between the contraction valves (8).

[0019] The following description, in conjunction with the accompanying drawings, illustrates the process of using the invention: When no high-pressure gas is injected into the airbag (3), the spring (4) pushes the sliding ring (6) downward, and at the same time drives the connecting rod (9) and the contraction valve (8) to contract. At this time, the diameter of the bottom outlet becomes smaller. When compressed air of a certain pressure is injected into the airbag (3) through the proportional valve (11), the airbag (3) drives the connecting plate (5) to move upward against the force of the spring (4), and at the same time drives the sliding ring (6), the connecting rod (9) and the contraction valve (8) to open. At this time, the diameter of the bottom outlet becomes larger. The pressure of the proportional valve (11) is positively correlated with the diameter of the bottom outlet, and the proportional coefficient is k. The value of k is taken from 1mm / 0.05MP to 1mm / 0.2MP according to the linear coefficient of airbag expansion and the spring stiffness.

Claims

1. A pneumatically variable diameter underflow inlet for a hydrocyclone, characterized in that... Includes: flange shell (1), inner liner (2), air bladder (3), spring (4), connecting plate (5), sliding ring (6), hinge (7), contraction valve (8), connecting rod (9), air pipe (10), proportional valve (11), baffle (12); The airbag (3), connecting plate (5), sliding ring (6), hinge (7), contraction valve (8), and connecting rod (9) are connected from top to bottom; The spring (4) is supported between the flange shell (1) and the sliding ring (6); The airbag (3) is supported between the connecting plate (5) and the flange shell (1); The connecting plate (5) is fixedly connected to the sliding ring (6); The contraction valve (8) is connected to the connecting rod (9) via a hinge (7); The trachea (10) is connected to the airbag (3) and the proportional valve (11); The baffle (12) is fixed between the joints of the contraction flap (8).

2. The hydrocyclone aerodynamic variable diameter underflow inlet as described in claim 1, characterized in that: The spring (4) is supported between the flange shell (1) and the sliding ring (6) and is fixed to the flange shell (1), pushing the sliding ring (6).

3. The hydrocyclone aerodynamic variable diameter underflow inlet as described in claim 1, characterized in that: The airbag (3) is supported between the connecting plate (5) and the flange shell (1). The airbag (3) is fixed to the flange shell (1), pushing the connecting plate (5) and driving the sliding ring (6).

4. The hydrocyclone aerodynamic variable diameter underflow inlet as described in claim 1, characterized in that: The contraction valve (8) is connected to the connecting rod (9) by a hinge (7), and the connecting rod (9) is connected to the sliding ring (6) by a hinge. The contraction valve (8) adjusts the diameter of the underflow outlet according to the up and down position of the sliding ring (6).

5. The pneumatically variable diameter underflow inlet of a hydrocyclone as described in claim 1, characterized in that: The airbag (3) and the proportional valve (11) are connected through the air tube (10), and the proportional valve (11) can adjust the air pressure inside the airbag (3) through the air tube (10).

6. The hydrocyclone aerodynamic variable diameter underflow inlet as described in claim 1, characterized in that: The baffle (12) is fixed between the gaps of the contraction valve (8), and the baffle (12) moves in accordance with the contraction or expansion action of the contraction valve (8) and is close to the contraction valve (8). When the fluid flows through the bottom outlet, the baffle (12) prevents fluid leakage between the gaps of the contraction valve (8).

7. The hydrocyclone aerodynamic variable diameter underflow inlet as described in claim 1, characterized in that: The diameter of the underflow outlet is linearly related to the air pressure inside the airbag, and the proportionality coefficient k is taken from 1mm / 0.05MP to 1mm / 0.2MP based on the linear coefficient of airbag expansion and the spring stiffness.

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