Pore plate type automatic regulating valve device for fan inlet

Abstract

The invention relates to the technical field of fan equipment, in particular to an orifice plate type automatic regulating valve device for a fan inlet. The device comprises a fixing mechanism, a rotating mechanism, a power mechanism, a sealing mechanism and a connecting rod mechanism. The fixing mechanism comprises a rotating hole plate chuck and a non-rotating hole plate chuck which are fixedly connected face to face, radial protrusions are arranged on the inner side of the fixing chuck and used for fixing the rotating mechanism, and an open hole is formed in the top of the rotating hole plate chuck and used for the rotating mechanism to stretch out. The rotating mechanism comprises a rotating pore plate and a fixed pore plate, the air volume is adjusted through the overlapping degree of openings, the power mechanism is used for pushing the rotating mechanism to achieve rotation of the rotating mechanism, the connecting rod mechanism is used for connecting the power mechanism and the rotating mechanism, and the sealing mechanism is used for sealing the whole device. The online adjustment of the air volume of the centrifugal fan can be realized, so that the online adjustment of the oxygen production of the system is realized, the labor intensity of workers is reduced, and the air stopping time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of fan equipment, and particularly relates to a plate-type automatic regulating valve device for a fan inlet hole. Background Art

[0002] In the process of metal smelting, a centrifugal blower is required to supply air to an adsorption tower. Lithium-based molecular sieve in the adsorption tower selectively adsorbs nitrogen in the air, adsorbing nitrogen and a small amount of oxygen, and a large amount of oxygen is enriched through the molecular sieve, so as to obtain 80%-96% oxygen. The produced oxygen is sent to the smelting furnace, blowing furnace, and refining furnace of the pyrometallurgical plant through a smelting centrifugal blower, a blowing centrifugal blower, and a piston-type oxygen compressor respectively. When adjusting the smelting load, the deep cryogenic oxygen production system has a slow adjustment working condition and cannot follow the smelting to adjust the load in time, while pressure swing adsorption cannot adjust the load.

[0003] Therefore, in order to meet the requirements of the smelting process and to avoid oxygen venting, it is necessary to develop a device for automatically and online adjusting the air intake volume of a centrifugal blower. Summary of the Invention

[0004] In order to solve the problems of the prior art, the present invention proposes a plate-type automatic regulating valve device for a fan inlet hole, and the specific scheme is as follows:

[0005] A plate-type automatic regulating valve device for a fan inlet hole includes a fixing mechanism, a rotating mechanism, a power mechanism, and a connecting rod mechanism; the fixing mechanism includes an annular fixing chuck and a base, the fixing chuck includes a rotating orifice plate chuck and a non-rotating orifice plate chuck fixedly connected face to face via bolts, radial protrusions are provided on the inner side of the fixing chuck, and an opening is provided at the top of the rotating orifice plate chuck; the rotating mechanism includes an annular rotating orifice plate and a fixed orifice plate, one side of the rotating orifice plate is a plane, and the other side is provided with an annular boss, one side of the fixed orifice plate is a plane, and the other side is provided with an annular groove matching the annular boss, the boss and the groove of the rotating orifice plate and the fixed orifice plate are inlaid and placed between the radial protrusions on the inner sides of the rotating orifice plate chuck and the non-rotating orifice plate chuck, a tab is provided at the outer edge of the top of the rotating orifice plate, and the tab is inserted into the opening of the rotating orifice plate chuck; the power mechanism is connected to the connecting rod mechanism, the connecting rod mechanism is connected to the tab, and the other end of the power mechanism is movably connected to the base.

[0006] Further, the power mechanism is an electric push rod.

[0007] Further, the fixing chuck is composed of two semi-circular rings and is fixed by bolts to form a complete ring.

[0008] Furthermore, the fixed chuck includes a ring, and a screw hole opening surface is radially provided on the outer periphery of the ring. The screw hole opening surface is perpendicular to the ring, and bolts pass through the screw holes on the screw hole opening surfaces of the rotating hole plate chuck and the non-rotating hole plate chuck to connect and fix them, forming a complete ring.

[0009] Furthermore, the link mechanism includes a tab connecting rod, an electric push rod and a hole plate connecting rod, and an electric push rod and a base connecting rod. The tab, the tab connecting rod, the electric push rod and the hole plate connecting rod, the electric push rod, the electric push rod and the base connecting rod, and the base are connected in sequence.

[0010] Furthermore, the tab connecting rod includes a front tab connecting rod and a rear tab connecting rod. The front tab connecting rod and the rear tab connecting rod sandwich the tab in the middle and are fixed by bolts.

[0011] Furthermore, a sealing mechanism is further included. The sealing mechanism includes a sealing box and a ball cage seal. The sealing box is fixed to the rotating hole plate chuck and the non-rotating hole plate chuck by bolts, and the tab of the rotating hole plate is located inside the sealing box. A hole is provided on the sealing box, and the electric push rod and the hole plate connecting rod pass through the hole on the sealing box. The bottom of the ball cage seal is installed at the opening on the sealing box, and the upper part is installed on the electric push rod and the hole plate connecting rod.

[0012] Furthermore, the sealing box includes a half-closed sealing box and a half-open hole sealing box, and the half-closed sealing box and the half-open hole sealing box are fixed by bolts.

[0013] Furthermore, the power mechanism is electrically connected to the control system.

[0014] The beneficial effects of the present invention are as follows: This device can replace manual replacement of the throttle orifice plate through online automatic adjustment. Firstly, it saves the impact of shutdown caused by offline replacement of the throttle orifice plate. Secondly, it reduces the labor intensity of workers. At the same time, after adding a throttle orifice plate at the inlet of the fan, the present device avoids the venting of excessive oxygen, reduces the operating power cost, and saves the purchase cost of the electric regulating actuator. With a simple electric push rod device, the operating cost is reduced and the comprehensive benefit is better. Moreover, this device will not cause surging or tripping of the fan. After the orifice plate rotates, the staggered round holes will evenly distribute the passing air flow. At the same time, the fixation between the structure fixing mechanism and the rotating mechanism of this device uses physical structure limitation or linkage, reducing the failure rate. Meanwhile, the physical limitation method directly restricts the maximum and minimum rotation angles of the rotating orifice plate, preventing misoperation by staff from causing the rotating orifice plate to rotate too large or too small an angle, which affects the air intake of the fan, resulting in situations such as fan surging or excessive negative pressure, increasing the equipment load and affecting the use. And a sealing device is arranged between the connecting rod mechanism and the rotating mechanism. The sealing device has the following functions: 1. Since there is a linkage relationship between the valve stem of the rotating orifice plate and the fixing mechanism in the rotating mechanism, it is inevitable to have air leakage. The sealing box is used to seal the linkage between the rotating mechanism and the fixing mechanism. 2. The sealing box serves as the seal between the rotating mechanism and the fixing mechanism, and also as a device to protect the connecting rod mechanism. At the same time, it can prevent staff from accidentally touching the connecting rod mechanism, avoiding mechanical injury to the staff. 3. The sealing box is also the fixed fulcrum of the connecting rod mechanism, which can fix the movement direction and angle of the connecting rod mechanism. 4. The ball cage sealing sleeve serves as the seal between the power mechanism and the connecting rod mechanism. This sealing sleeve solves the commonly used fixed sealing structure, and is changed to a sealing device with both ends fixed and the middle section movable. In this way, while not affecting the movement of the connecting rod mechanism, it can also complete the seal at the connection between the power mechanism and the connecting rod mechanism. 5. The above-mentioned sealing device solves the sealing problem of the entire orifice plate type automatic regulating valve, and plays an important role in aspects such as connecting rod protection, operator protection, and connecting rod mechanism fulcrum. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following further describes the embodiments of the present invention with reference to the drawings, where:

[0016] Figure 1 FIG. shows a three-dimensional structural schematic diagram of the orifice plate type automatic regulating valve device at the fan inlet in the embodiment of the present invention;

[0017] Figure 2 FIG. shows a front view of the orifice plate type automatic regulating valve device at the fan inlet in the embodiment of the present invention when the opening is at its maximum;

[0018] Figure 3 FIG. shows a front view of the orifice plate type automatic regulating valve device at the fan inlet in the embodiment of the present invention when the opening is at its minimum;

[0019] Figure 4 Shows the rotating orifice plate chuck (upper figure) and non-rotating orifice plate chuck (lower figure) in the fan inlet orifice plate type automatic regulating valve device in the embodiment of the present invention;

[0020] Figure 5 Shows the rotating orifice plate (upper figure) and fixed orifice plate (lower figure) in the fan inlet orifice plate type automatic regulating valve device in the embodiment of the present invention;

[0021] Figure 6 Shows the schematic diagram of air flow simulation when the plate holes of the fan inlet orifice plate type automatic regulating valve device in the embodiment of the present invention coincide, that is, when the opening is the largest;

[0022] Figure 7 Shows the schematic diagram of air flow simulation when the plate holes of the fan inlet orifice plate type automatic regulating valve device in the embodiment of the present invention are staggered, that is, when the opening is the smallest.

[0023] Wherein, 101 - left chuck of the rotating orifice plate, 102 - right chuck of the rotating orifice plate, 103 - left chuck of the non-rotating orifice plate, 104 - right chuck of the non-rotating orifice plate, 105 - base, 201 - rotating orifice plate, 202 - fixed orifice plate, 301 - electric push rod, 401 - connecting rod of the front lug, 402 - connecting rod of the rear lug, 403 - connecting rod between the electric push rod and the orifice plate, 404 - connecting rod between the electric push rod and the base, 501 - closed sealing box, 502 - open-hole sealing box, 503 - ball cage sealing sleeve. Detailed implementation manners

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] A fan inlet orifice plate type automatic regulating valve device includes a fixing mechanism, a rotating mechanism, a power mechanism, a connecting rod mechanism and a sealing mechanism, and the power mechanism is an electric push rod 301 with a torque of 1.4 kN and a stroke of 500 mm.

[0026] The fixing mechanism includes an annular fixing chuck and a base 105. The fixing chuck includes a rotating orifice plate chuck and a non-rotating orifice plate chuck of the same size that are fixedly connected face to face via bolts. Both the rotating orifice plate chuck and the non-rotating orifice plate chuck are composed of two semi-circular rings, namely the rotating orifice plate left chuck 101, the rotating orifice plate right chuck 102, the non-rotating orifice plate left chuck 103, and the non-rotating orifice plate right chuck 104. The two ends of the semi-circular ring are provided with outwardly protruding opening wing plates. Bolts pass through the openings of the wing plates of the rotating orifice plate left chuck 101 and the rotating orifice plate right chuck 102 to fix the rotating orifice plate chuck into a complete ring. Bolts pass through the openings of the wing plates of the non-rotating orifice plate left chuck 103 and the non-rotating orifice plate right chuck 104 to fix the non-rotating orifice plate chuck into a complete ring. Radial protrusions are provided on the inner sides of the fixing chucks. An opening is also provided at the top of the rotating orifice plate right chuck 102. The opening is a square hole with dimensions of 344 mm × 25 mm. The fixing chuck includes a ring. A threaded hole opening surface is radially provided on the outer periphery of the ring. The threaded hole opening surface is perpendicular to the ring (i.e., perpendicular to the axial direction). Bolts pass through the threaded holes on the threaded hole opening surfaces of the rotating orifice plate chuck and the non-rotating orifice plate chuck to connect and fix them, forming a complete ring-shaped fixing chuck.

[0027] The rotating mechanism includes an annular rotating orifice plate 201 and a fixed orifice plate 202. The fixed orifice plate 202 is fixed to the fixing chuck. Circular holes of the same size are evenly opened along the circumference on the orifice plate. One side of the rotating orifice plate 201 is a plane, and the other side is provided with an annular boss. One side of the fixed orifice plate 202 is a plane, and the other side is provided with an annular groove matching the annular boss. The boss and the groove of the rotating orifice plate 201 and the fixed orifice plate 202 are inlaid and placed between the radial protrusions on the inner sides of the rotating orifice plate chuck and the non-rotating orifice plate chuck. The inlaid groove forms a fixation in the radial direction to prevent radial displacement. The inner protrusion of the fixing chuck forms a limit perpendicular to the ring surface to achieve axial fixation. A tab is provided at the outer edge of the top of the rotating orifice plate 201. The tab is inserted into the opening of the rotating orifice plate chuck. The power mechanism is connected to the link mechanism, and the link mechanism is connected to the tab. The other end of the power mechanism is movably connected to the base 105. The link mechanism includes a tab connecting rod, an electric push rod, a connecting rod between the orifice plate and the base 403, and a connecting rod between the electric push rod and the base 404. The tab, the tab connecting rod, the connecting rod between the electric push rod and the orifice plate 403, the electric push rod, the connecting rod between the electric push rod and the base 404, and the base 105 are connected in sequence. The power mechanism, i.e., the electric push rod 301, drives the tab, thereby driving the rotating orifice plate 201 to move within the opening range of the rotating orifice plate chuck. The tab connecting rod includes a front tab connecting rod 401 and a rear tab connecting rod 402. The front tab connecting rod 401 and the rear tab connecting rod 402 sandwich the tab in the middle and are fixed via bolts.

[0028] The sealing mechanism includes a sealing box and a constant velocity joint sealing sleeve 503. The sealing box is fixed to the rotating orifice plate chuck and the non-rotating orifice plate chuck via bolts, and the tab of the rotating orifice plate 201 is located inside the sealing box. There is a hole on the sealing box, and the electric push rod and the orifice plate connecting rod 403 pass through the hole on the sealing box. The bottom of the constant velocity joint sealing sleeve 503 is installed at the opening on the sealing box, and the upper part is installed on the electric push rod and the orifice plate connecting rod 403 to achieve the sealing effect. The sealing box can be composed of a half-closed sealing box 501 and a half-open sealing box 502. The half-closed sealing box 501 is fixedly connected via bolts passing through the screw holes on the screw hole opening surface of the non-rotating orifice plate right chuck 104, and the half-open sealing box 502 is fixedly connected via bolts passing through the screw holes on the screw hole opening surface of the rotating orifice plate right chuck 102.

[0029] The method for adjusting the air volume using the above-mentioned automatic regulating valve device for the fan inlet orifice plate includes the following steps:

[0030] Step 1: The controller controls the electric push rod 301 to start. The electric push rod 301 pushes the electric push rod and the orifice plate connecting rod 403, causing the electric push rod and the orifice plate connecting rod 403 to rotate. The tab connecting rod, the electric push rod and the orifice plate connecting rod 403 are connected by bolts and thus rotate together, driving the rotating orifice plate 201 to rotate together. When the rotation angle reaches 22.5° (clockwise), the tab touches the opening edge of the rotating orifice plate chuck, triggering the limit switch and stopping the rotation. At this time, the minimum ventilation volume is achieved.

[0031] Step 2: The controller controls the electric push rod 301 to start, causing the electric push rod 301 to pull the electric push rod and the orifice plate connecting rod 403, making the electric push rod and the orifice plate connecting rod 403 rotate, driving the tab and the rotating orifice plate 201 to rotate together. When the rotation angle reaches -22.5° (counterclockwise), the tab touches the other edge of the opening of the rotating orifice plate chuck, triggering the limit switch and stopping the rotation. At this time, the openings completely overlap and the maximum ventilation volume is achieved.

[0032] Some exemplary embodiments of the present invention are described above. It can be understood that the above embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention. The features in these embodiments can be recombined in a suitable manner, and the obtained solutions are still within the protection scope required by the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without creative efforts, that is, all modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application, all fall within the protection scope required by the present invention.

Claims

1. An automatic regulating valve device for the orifice plate at the fan inlet, characterized in that, It includes a fixing mechanism, a rotating mechanism, a power mechanism, and a connecting rod mechanism; the fixing mechanism includes an annular fixing chuck and a base (105), the fixing chuck includes a rotating orifice plate chuck and a non-rotating orifice plate chuck that are fixedly connected face to face via bolts, a radial protrusion is provided on the inner side of the fixing chuck, and an opening is provided at the top of the rotating orifice plate chuck; the rotating mechanism includes an annular rotating orifice plate (201) and a fixed orifice plate (202), one side of the rotating orifice plate (201) is a plane, and the other side is provided with an annular boss, one side of the fixed orifice plate (202) is a plane, and the other side is provided with an annular groove matching the annular boss, the boss and the groove of the rotating orifice plate (201) and the fixed orifice plate (202) are inlaid and placed between the radial protrusions on the inner sides of the rotating orifice plate chuck and the non-rotating orifice plate chuck, a tab is provided at the outer edge of the top of the rotating orifice plate (201), and the tab is inserted into the opening of the rotating orifice plate chuck; the power mechanism is connected to the connecting rod mechanism, the connecting rod mechanism is connected to the tab, and the other end of the power mechanism is movably connected to the base (105).

2. The automatic regulating valve device of the orifice plate type at the fan inlet according to claim 1, characterized in that, The power mechanism is an electric push rod (301).

3. The automatic regulating valve device of the orifice plate type at the blower inlet according to claim 1, wherein, The fixing chuck is composed of two semi-circular rings and is fixed via bolts to form a complete ring.

4. The automatic regulating valve device of the orifice plate type at the fan inlet according to claim 1, wherein The fixing chuck includes a ring, a screw hole opening surface is radially provided on the outer periphery of the ring, the screw hole opening surface is perpendicular to the ring, and bolts pass through the screw holes on the screw hole opening surfaces of the rotating orifice plate chuck and the non-rotating orifice plate chuck to connect and fix them to form a complete ring.

5. The automatic regulating valve device of the orifice plate type at the fan inlet according to claim 2, wherein, The connecting rod mechanism includes a tab connecting rod, an electric push rod and an orifice plate connecting rod (403), and an electric push rod and a base connecting rod (404), and the tab, the tab connecting rod, the electric push rod and the orifice plate connecting rod (403), the electric push rod, the electric push rod and the base connecting rod (404), and the base (105) are connected in sequence.

6. The automatic regulating valve device of the orifice plate type at the fan inlet according to claim 5, characterized in that, The tab connecting rod includes a front tab connecting rod (401) and a rear tab connecting rod (402), and the front tab connecting rod (401) and the rear tab connecting rod (402) clamp the tab in the middle and are fixed via bolts.

7. An automatic regulating valve device of orifice plate type at the fan inlet according to claim 1, characterized in that, It further includes a sealing mechanism, the sealing mechanism includes a sealing box and a constant velocity joint seal sleeve (503), the sealing box is fixed to the rotating orifice plate chuck and the non-rotating orifice plate chuck via bolts, and the tab of the rotating orifice plate (201) is located inside the sealing box, a hole is provided on the sealing box, and the electric push rod and the orifice plate connecting rod (403) pass through the hole on the sealing box, and the bottom of the constant velocity joint seal sleeve (503) is installed at the opening of the sealing box, and the upper part is installed on the electric push rod and the orifice plate connecting rod (403).

8. The automatic regulating valve device of the orifice plate type at the fan inlet according to claim 7, wherein, The sealing box includes a half-closed sealing box (501) and a half-open hole sealing box (502), and the half-closed sealing box (501) and the half-open hole sealing box (502) are fixed via bolts.

9. The automatic regulating valve device of the orifice plate type at the fan inlet according to claim 1, wherein The power mechanism is electrically controlled and connected to the control system.

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