Self-dedusting pneumatic conveying station

Abstract

The utility model discloses a self-dedusting type pneumatic conveying station, and relates to a pneumatic conveying station for powder materials. The device comprises a rotary valve, a feeding end flange of the rotary valve is connected with a feeding hopper, an air inlet end flange of the rotary valve is connected with an air inlet pipe, and a discharging end flange of the rotary valve is connected with a conveying pipeline; the feeding hopper is of a double-layer sleeve type structure, a lower port of an inner cylinder of the feeding hopper extends downwards to the position above an impeller in the rotary valve, and an air outlet pipe communicated with an inner cavity of the outer cylinder is arranged on the side wall of the outer cylinder. A notch is formed in the side wall of the air inlet pipe, an ejector located in a pipeline of the notch is installed at the notch, and the ejection end of the ejector communicates with the air outlet pipe through a dust suction pipe. According to the rotary valve, dust raised at the feeding end of the rotary valve can be prevented from scattering and escaping to affect the working environment of an external space, meanwhile, the dust does not leak to the external space, and medium consumption can be reduced.

Description

Technical Field

[0001] The utility model relates to a pneumatic conveying station for powder materials, in particular to a self-dust-removing pneumatic conveying station. Background Art

[0002] In chemical solid material production equipment and conveying systems, pneumatic conveying stations composed of rotary valves and exhaust hoppers are widely used. The air-closing function of the rotary valve can maintain the stability of the conveying air force inside the pneumatic conveying pipeline. Pneumatic conveying stations are very easy to generate dust when conveying powders, which is not conducive to environmental protection. Therefore, the existing pneumatic conveying stations are equipped with independent dust collectors at the feed port, but this is easy to cause the loss of powder materials, and in some occasions, the space of the feed port is limited, which is not convenient for installing dust collectors, such as ton bag feeding stations and manual feeding stations. Utility Model Content

[0003] In view of the problem of powder material loss caused by the above-mentioned dust collector and the problem that the space of the feed port is limited in some occasions, making it inconvenient to install the dust collector, the utility model provides a self-dust-removing pneumatic conveying station, which eliminates the need for the installation of a dust collector, saves installation space, and can re-inject the dust raised by the powder material in the feed end into the conveying pipeline without loss to complete pneumatic conveying.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A self-dusting pneumatic conveying station comprises a rotary valve, a feed hopper is connected to the feed end flange, an air inlet pipe is connected to the air inlet end flange, and a conveying pipeline is connected to the discharge end flange;

[0006] The feed hopper adopts a double-layer sleeve structure, the lower port of the inner tube extends downward to above the impeller inside the rotary valve, and the side wall of the outer tube is provided with an air outlet pipe communicating with its inner cavity;

[0007] A notch is provided on the side wall of the air inlet pipe, and an ejector located inside the pipe is installed at the notch. The ejection end of the ejector is connected to the air outlet pipe through a dust suction pipe.

[0008] Furthermore, the injector comprises:

[0009] The injection pipe is located inside the air intake pipe, and is provided with a dust receiving chamber and a mixing chamber which are connected in sequence. The dust receiving chamber and the mixing chamber are connected by a tapered transition. An ejection pipe which is connected to the dust receiving chamber and constitutes the ejection end of the ejector and an air intake pipe connected to compressed air are provided on the side wall of the injection pipe. The mixing chamber is adjacent to the outlet end of the injection pipe, and the outlet end of the injection pipe is adjacent to the air intake end flange of the rotary valve.

[0010] A fixed sealing plate, the outer periphery of which is matched with the notch on the side wall of the air inlet pipe and welded, and the ejector pipe and the air inlet pipe on the injection pipe penetrate and connect the fixed sealing plate;

[0011] A nozzle is arranged inside the injection pipe, wherein the gas injection outlet thereof is communicated with the dust receiving chamber, and the gas inlet thereof is adjacent to the air inlet duct;

[0012] The gas volume regulating component is arranged inside the injection pipe and is used to regulate the gas volume passing through the inner hole of the nozzle per unit time.

[0013] Furthermore, the gas volume regulating component comprises:

[0014] A guide seat, which is arranged at an end away from the outlet end of the injection pipe;

[0015] An adjusting needle, the body of which is inserted into the inner hole of the guide seat and the tip of which is inserted into the inner hole of the nozzle, the inner hole of the guide seat is embedded with a sealing ring that forms a seal with the outer wall of the adjusting needle, the inner hole of the nozzle is tapered, and the depth of the tip of the adjusting needle inserted into the inner hole of the nozzle determines the amount of gas passing through the inner hole of the nozzle per unit time, the other end of the adjusting needle is located outside the injection pipe and connected to a bent straight arm, the straight arm penetrates the side wall of the intake pipe, and a straight groove for the translation of the straight arm is opened on the side wall of the intake pipe;

[0016] The top screw is threadedly connected to a threaded hole penetrating the fixed sealing plate and the guide seat and abuts against an adjusting needle body inserted into the inner hole of the guide seat.

[0017] Furthermore, both ends of the dust suction pipe are connected to the air outlet pipe and the ejection pipe respectively by throat clamps.

[0018] Furthermore, it also includes a reducer for driving the impeller inside the rotary valve to rotate and a reducer torque arm with one end bolted to the reducer and the other end connected to the adjacent valve cover of the rotary valve.

[0019] The beneficial effects of the utility model are:

[0020] 1. When powder material enters the rotary valve from the feed hopper, material dust will be raised at the feed end of the rotary valve, and the ejector can form negative pressure, and the ejector end is connected to the air outlet pipe through the dust suction pipe. The raised dust can enter the cavity between the inner and outer cylinders of the feed hopper due to the negative pressure, and then enter the ejector from the air outlet pipe and the dust suction pipe. The ejector injects the dust into the air inlet pipe, and then enters the interior of the rotary valve, and is discharged from the conveying pipeline installed by the flange at the discharge end of the rotary valve. This structural design can prevent the dust raised at the feed end of the rotary valve from escaping and affecting the working environment of the external space. At the same time, the dust does not leak to the external space, which can reduce the consumption of the medium. In addition, it also eliminates the existing dust removal method of installing a dust collector, saving installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] Figure 1 It is a stereogram of the utility model.

[0023] Figure 2 It is an axial cross-section of the feed end of the rotary valve.

[0024] Figure 3 It is a front view of the utility model.

[0025] Figure 4 yes Figure 3 Enlarged view of point A in .

[0026] In the figure: 1, rotary valve, 100, impeller, 101, valve cover, 2, feed hopper, 200, inner cylinder, 201, outer cylinder, 202, air outlet pipe, 3, air inlet pipe, 4, conveying pipeline, 5, ejector, 500, injection pipe, 501, dust receiving chamber, 502, mixing chamber, 503, ejector pipe, 504, air inlet pipe, 505, fixed sealing plate, 506, nozzle, 507, guide seat, 508, adjusting needle, 509, straight arm, 510, top screw, 511, sealing ring, 6, dust suction pipe, 7, straight groove, 8, throat clamp, 9, reducer, 10, reducer torque arm. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0028] like Figure 1-4 As shown, in order to solve the above technical problems, the utility model adopts the following technical solutions:

[0029] A self-dusting pneumatic conveying station comprises a rotary valve 1, a feed hopper 2 is connected to the feed end flange, an air inlet pipe 3 is connected to the air inlet end flange, and a conveying pipeline 4 is connected to the discharge end flange;

[0030] The feed hopper 2 adopts a double-layer sleeve structure, the lower end of the inner cylinder 200 extends downward to 1-3 mm above the impeller 100 inside the rotary valve 1, and the side wall of the outer cylinder 201 is provided with an air outlet pipe 202 communicating with its inner cavity;

[0031] A slot is formed on the side wall of the air inlet pipe 3, and an ejector 5 is installed inside the pipe at the slot. The ejection end of the ejector 5 is connected to the air outlet pipe 202 through a dust suction pipe 6, and the dust suction pipe 6 is a flexible pipe.

[0032] When powder material enters the rotary valve 1 at the feed hopper 2, material dust will be raised at the feed end of the rotary valve 1, and the ejector 5 can form a negative pressure, and the ejection end of the ejector 5 is connected to the air outlet pipe 202 through the dust suction pipe 6. The raised dust can enter the cavity between the inner cylinder 200 and the outer cylinder 201 of the feed hopper 2 due to the negative pressure, and then enter the ejector 5 from the air outlet pipe 202 and the dust suction pipe 6. The ejector 5 injects the dust into the air inlet pipe 3, and then enters the interior of the rotary valve 1, and is discharged from the conveying pipe 4 installed with a flange at the discharge end of the rotary valve 1. This structural design can prevent the dust raised at the feed end of the rotary valve 1 from escaping and affecting the working environment of the external space. At the same time, the dust does not leak to the external space, which can reduce the consumption of the medium.

[0033] In this embodiment, the injector 5 includes an injection pipe 500, a fixed sealing plate 505, a nozzle 506, and a gas volume adjustment component.

[0034] The injection pipe 500 is located inside the air intake pipe 3, and is provided with a dust receiving chamber 501 and a mixing chamber 502 which are connected in sequence. The dust receiving chamber 501 and the mixing chamber 502 are connected by a tapered transition. The side wall of the injection pipe 500 is provided with an ejection pipe 503 which is connected to the dust receiving chamber 501 and constitutes the ejection end of the ejector 5, and an air intake pipe 504 which is connected to the compressed air. The mixing chamber 502 is adjacent to the outlet end of the injection pipe 500, and the outlet end of the injection pipe 500 is adjacent to the outlet end of the injection pipe 500. The air inlet end flange of the rotary valve 1; the outer periphery of the fixed sealing plate 505 is matched with the groove on the side wall of the air inlet pipe 3 and welded, and the ejector pipe 503 and the air inlet pipe 504 on the injection pipe 500 penetrate and connect the fixed sealing plate 505; the nozzle 506 is arranged inside the injection pipe 500, and its gas injection outlet is communicated with the dust receiving chamber 501, and its gas inlet is adjacent to the air inlet pipe 504; the gas volume adjustment component is arranged inside the injection pipe 500 to adjust the gas flow rate of the inner hole of the nozzle 506 per unit time.

[0035] After the air inlet pipe 504 of the ejector 5 is connected to the compressed air, the compressed air enters the ejector 5 tube, then passes through the nozzle 506 from the gas inlet port of the nozzle 506, and is sprayed into the dust receiving chamber 501 from the gas injection outlet of the nozzle 506, and then enters the mixing chamber 502. The ejector pipe 503 connected to the dust receiving chamber 501 has a fast air flow through the dust receiving chamber 501, so the gas pressure is small. Therefore, the negative pressure can be used to allow the dust raised at the feeding end of the rotary valve 1 to enter the cavity between the inner cylinder 200 and the outer cylinder 201 of the feed hopper 2, and then enter the dust receiving chamber 501 of the ejector 5 from the air outlet pipe 202, the dust suction pipe 6, and the ejector pipe 503 in turn. Then, the dust enters the mixing chamber 502 with the air flow, and then the dust is injected into the air inlet pipe 3, and then enters the interior of the rotary valve 1, and is discharged from the conveying pipe 4 installed with a flange at the discharge end of the rotary valve 1.

[0036] The gas volume adjustment component mentioned above in the present application includes a guide seat 507 , an adjustment needle 508 , and a top screw 510 .

[0037] The guide seat 507 is arranged at one end away from the outlet end of the injection pipe 500; the regulating needle 508 body is inserted into the inner hole of the guide seat 507 and the tip of the regulating needle 508 is inserted into the inner hole of the nozzle 506; the inner hole of the guide seat 507 is embedded with a sealing ring 511 which forms a seal with the outer wall of the regulating needle 508; the inner hole of the nozzle 506 is conical; the depth of the tip of the regulating needle 508 inserted into the inner hole of the nozzle 506 determines the amount of gas passing through the inner hole of the nozzle 506 per unit time; the other end of the regulating needle 508 is located outside the injection pipe 500 and is connected to the bent straight arm 509; the straight arm 509 penetrates the side wall of the intake pipe 3 and the intake pipe 506 is provided ... intake pipe 506; the inner hole of the nozzle 506 is conical; the depth of the tip of the regulating needle 508 inserted into the inner hole of the nozzle 506 determines the amount of gas passing through the inner hole of the nozzle 506 per unit time; the A straight groove 7 for the translation of the straight arm 509 is provided on the side wall of the tube 3. By translating the straight arm 509 along the straight groove 7, the position of the adjusting needle 508 body can be adjusted, thereby adjusting the depth of the needle tip of the adjusting needle 508 inserted into the inner hole of the nozzle 506; the top screw 510 is threadedly connected to the threaded hole penetrating the fixed sealing plate 505 and the guide seat 507 and abuts against the adjusting needle 508 body inserted into the inner hole of the guide seat 507. The adjusting needle 508 body is tightened by the top screw 510, and the position of the adjusting needle 508 can be locked after the position is adjusted to prevent the adjusting needle 508 body from being displaced due to processing jitter.

[0038] In this embodiment, both ends of the dust suction pipe 6 are connected to the air outlet pipe 202 and the ejection pipe 503 respectively by throat clamps 8, so as to facilitate disassembly, cleaning or replacement thereof.

[0039] The present application also includes a reducer 9 for driving the impeller 100 inside the rotary valve 1 to rotate, and a reducer torque arm 10 with one end bolted to the reducer 9 and the other end connected to the adjacent valve cover 101 of the rotary valve 1. The reducer torque arm 10 is an important reducer component, which has high strength and rigidity, can effectively resist the torsional force generated by the action of the torque, and various rigid connection requirements, so that the reducer 9 can stably drive the impeller 100 inside the rotary valve 1 to rotate.

[0040] The above-described implementation modes of the present invention do not constitute a limitation on the protection scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A self-dusting pneumatic conveying station, comprising a rotary valve (1), a feed hopper (2) being flange-mounted and connected to the feed end thereof, an air inlet pipe (3) being flange-mounted and connected to the air inlet end thereof, and a conveying pipeline (4) being flange-mounted and connected to the discharge end thereof, characterized in that: The feed hopper (2) adopts a double-layer sleeve structure, the lower port of the inner tube (200) extends downward to above the impeller (100) inside the rotary valve (1), and the side wall of the outer tube (201) is provided with an air outlet pipe (202) communicating with the inner cavity thereof; The side wall of the air inlet pipe (3) is provided with a notch, and an ejector (5) located inside the pipe is installed at the notch, and the ejection end of the ejector (5) is connected to the air outlet pipe (202) through a dust suction pipe (6).

2. The self-dusting pneumatic conveying station according to claim 1, characterized in that The injector (5) comprises: An injection pipe (500) is located inside the air intake pipe (3), and is provided with a dust receiving chamber (501) and a mixing chamber (502) which are connected in sequence. An injection pipe (503) which is connected to the dust receiving chamber (501) and constitutes the injection end of the injector (5) and an air intake pipe (504) which is connected to compressed air are provided on the side wall of the injection pipe (500); the mixing chamber (502) is adjacent to the outlet end of the injection pipe (500); A fixed sealing plate (505) whose outer circumference matches and is welded to the notch on the side wall of the air intake pipe (3), and the ejector pipe (503) and the air intake pipe (504) on the injection pipe (500) penetrate and connect the fixed sealing plate (505); A nozzle (506) is disposed inside the spray pipe (500), wherein the gas spray outlet thereof is communicated with the dust receiving chamber (501), and the gas inlet thereof is adjacent to the air inlet pipe (504); A gas volume regulating component is arranged inside the injection pipe (500) and is used to regulate the gas volume passing through the inner hole of the nozzle (506) per unit time.

3. The self-dusting pneumatic conveying station according to claim 2, characterized in that : The gas volume regulating component comprises: A guide seat (507) disposed at an end away from the outlet end of the injection pipe (500); An adjusting needle (508), the body of which is inserted into the inner hole of the guide seat (507) and the tip of which is inserted into the inner hole of the nozzle (506); the other end of the adjusting needle (508) is located outside the injection pipe (500) and connected to a bent straight arm (509); the straight arm (509) penetrates the side wall of the air intake pipe (3); and a straight groove (7) for the straight arm (509) to translate is provided on the side wall of the air intake pipe (3); The top screw (510) is threadedly connected to a threaded hole penetrating the fixed sealing plate (505) and the guide seat (507) and abuts against the main body of the adjustment needle (508) inserted into the inner hole of the guide seat (507).

4. The self-dusting pneumatic conveying station according to claim 3 is characterized in that A sealing ring (511) is embedded in the inner hole of the guide seat (507) and forms a seal with the outer wall of the adjustment needle (508).

5. The self-dusting pneumatic conveying station according to claim 2, characterized in that The inner hole of the nozzle (506) is conical, and the depth to which the tip of the adjusting needle (508) is inserted into the inner hole of the nozzle (506) determines the amount of gas passing through the inner hole of the nozzle (506) per unit time.

6. The self-dusting pneumatic conveying station according to claim 2, characterized in that Both ends of the dust suction pipe (6) are connected to the air outlet pipe (202) and the ejection pipe (503) respectively by means of throat clamps (8).

7. The self-dusting pneumatic conveying station according to claim 2, characterized in that The dust receiving chamber (501) and the mixing chamber (502) are connected by a tapered transition.

8. The self-dusting pneumatic conveying station according to claim 1, characterized in that The rotary valve (1) further comprises a reducer (9) for driving the impeller (100) inside the rotary valve (1) to rotate, and a reducer torque arm (10) having one end bolted to the reducer (9) and the other end connected to an adjacent valve cover (101) of the rotary valve (1).

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