Large-conveying-capacity air return prevention device of screw pump

Abstract

The utility model discloses a screw pump large delivery capacity air return prevention device which comprises an air-material mixing box arranged on one side of a screw pump and a mixing box base installed at the bottom of the air-material mixing box, an air inlet and a discharging port are formed in the two sides of the mixing box base respectively, an air inlet device is installed at the air inlet, and an air outlet device is installed at the discharging port. One end of the air inlet device extends into the mixing box base, the other end of the air inlet device is connected with air supply equipment, and a baffle is arranged between the top of the inner side of the mixing box base and the bottom of the air-material mixing box; according to the utility model, the extended nozzle and the nozzle brim are arranged, so that the flowing speed of airflow is increased when the airflow passes through, a forward and non-divergent airflow is formed, and a small amount of airflow is blocked by the baffle after diverging, so that the airflow cannot completely enter the main shaft spiral, and the return air is reduced; due to the included angle between the baffle and the base of the mixing box, the materials can fall down from the upper part, and the lower airflow is blocked in the base, so that return air entering is reduced, and the conveying capacity is improved.

Description

Technical Field

[0001] This utility model specifically relates to a high-capacity anti-backflow device for a spiral pump. Background Technology

[0002] Currently, in pneumatic conveying systems for powders such as cement and mineral powder, silo pumps operate intermittently and cannot achieve continuous conveying. If screw pumps are used for large-volume conveying, domestic screw pump products are insufficient to meet the demand. The fundamental reason is that the backflow problem cannot be effectively solved, resulting in reduced conveying capacity and low conveying efficiency.

[0003] Therefore, it is necessary to invent a spiral pump with high delivery capacity and anti-backflow device to solve the above problems. Utility Model Content

[0004] (a) Purpose of the utility model

[0005] To address the technical problems existing in the background art, this utility model proposes a spiral pump high-capacity anti-backflow device, which can reduce backflow and increase the conveying capacity.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a spiral pump high-capacity anti-backflow device, comprising an air-material mixing box disposed on one side of the spiral pump and a mixing box base installed at the bottom of the air-material mixing box, wherein an air inlet and a material outlet are respectively provided on both sides of the mixing box base, an air inlet device is installed at the air inlet, one end of the air inlet device extends into the interior of the mixing box base, and the other end is connected to an air supply device, and a baffle is provided between the top of the inner side of the mixing box base and the bottom of the air-material mixing box;

[0008] The air intake device includes a connecting pipe that is connected to the air supply equipment. The outside of the connecting pipe is provided with a fixing ring that is connected to one side of the mixing box base. The other end of the connecting pipe is connected to an extension nozzle. The upper half of one end of the extension nozzle is also provided with a nozzle cap.

[0009] Preferably, the cross-sectional dimension of the output end of the extended nozzle is smaller than that of the input end, and the nozzle cap is installed on the upper half of its output end, and the overall length of the extended nozzle and the nozzle cap does not exceed the centerline of the mixing box base.

[0010] Preferably, the baffle is positioned above the extended nozzle and the nozzle cap, and the baffle is fixed to the mixing box base by an angled weld.

[0011] Preferably, the gas-material mixing box has an inlet on one side that connects to the screw pump.

[0012] Preferably, the inlet is further provided with a positioning connection flange that connects to the spiral pump.

[0013] Preferably, the bottom of the mixing tank base is also provided with a support plate.

[0014] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are:

[0015] 1. This utility model improves the airflow velocity by setting an extended nozzle and nozzle cap, forming a forward-moving airflow that does not diverge. A small amount of airflow diverges and is obstructed by the baffle, preventing it from entering the main shaft spiral, thereby reducing the return airflow.

[0016] 2. This utility model sets an angle between the baffle and the base of the mixing box, allowing the material to fall from above while the airflow below is blocked inside the base, thereby reducing the ingress of backflow and increasing the conveying capacity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic plan view of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the disassembled installation structure of the air intake device of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Gas-material mixing box; 11. Inlet; 12. Positioning connection flange; 2. Mixing box base; 21. Support plate; 3. Air inlet; 4. Discharge outlet; 5. Air inlet device; 51. Connecting pipe; 52. Fixing ring; 53. Extended nozzle; 54. Nozzle cap; 6. Baffle. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] This utility model provides, for example Figure 1-2The spiral pump high-capacity anti-backflow device shown includes an air-material mixing box 1 set on one side of the spiral pump and a mixing box base 2 installed at the bottom of the air-material mixing box 1. The mixing box base 2 is provided with an air inlet 3 and a material outlet 4 on both sides. An air inlet device 5 is installed at the air inlet 3. One end of the air inlet device 5 extends into the interior of the mixing box base 2, and the other end is connected to the air supply equipment. A baffle 6 is provided between the top of the inner side of the mixing box base 2 and the bottom of the air-material mixing box 1.

[0024] Specifically, the air intake device 5 includes a connecting pipe 51 connected to the air supply equipment. The connecting pipe 51 has a fixing ring 52 connected to one side of the mixing box base 2. The other end of the connecting pipe 51 is connected to an extension nozzle 53. The upper half of one end of the extension nozzle 53 is also provided with a nozzle cap 54.

[0025] In this embodiment, the inlet 11 on one side of the gas-material mixing tank 1 is connected to the screw pump, and a stable connection between the gas-material mixing tank 1 and the screw pump is achieved through the positioning connecting flange 12 around the inlet 11. This ensures a tight connection and prevents problems such as material leakage during operation.

[0026] Specifically, connect the connecting pipe 51 of the air intake device 5 to the air supply equipment, and then connect the fixing ring 52 on the outside of the connecting pipe 51 to one side of the mixing chamber base 2 to fix the air intake device 5. One end of the extended nozzle 53 of the air intake device 5 extends into the interior of the mixing chamber base 2, ensuring that the cross-sectional dimension of the output end of the extended nozzle 53 is smaller than the cross-sectional dimension of the input end. Install a nozzle cap 54 on the upper half of one end of the extended nozzle 53, while ensuring that the overall length of the extended nozzle 53 and the nozzle cap 54 does not exceed the centerline of the mixing chamber base 2.

[0027] Specifically, a baffle 6 is installed between the top of the inner side of the mixing box base 2 and the bottom of the gas-material mixing box 1, so that the baffle 6 is positioned above the extended nozzle 53 and the nozzle cap 54, and the baffle 6 is fixed to the mixing box base 2 by angle welding to ensure that the baffle 6 is firmly installed.

[0028] Specifically, a support plate 21 is installed at the bottom of the mixing tank base 2 to provide support for the entire device and ensure the stability of the device during operation.

[0029] Specifically, the output end cross-sectional dimension of the extended nozzle 53 is smaller than the input end cross-sectional dimension, and the nozzle cap 54 is installed on the upper half of its output end. The overall length of the extended nozzle 53 and the nozzle cap 54 does not exceed the centerline of the mixing box base 2.

[0030] Specifically, the baffle 6 is placed above the extended nozzle 53 and the nozzle cap 54, and the baffle 6 is fixed to the mixing box base 2 by angle welding.

[0031] Specifically, the gas-material mixing box 1 has an inlet 11 on one side that is connected to the screw pump.

[0032] Specifically, a positioning connection flange 12 for connecting to the spiral pump is also provided around the inlet 11.

[0033] Specifically, the bottom of the mixing tank base 2 is also provided with a support plate 21.

[0034] In this embodiment, the air supply device is activated, and air enters the mixing chamber base 2 through the air intake device 5. The air enters from the connecting pipe 51 of the air intake device 5, passes through the extended nozzle 53, and then enters the mixing chamber base 2. Because the output cross-sectional size of the extended nozzle 53 is smaller than the input cross-sectional size, the air accelerates as it passes through the extended nozzle 53, forming a high-speed airflow. The presence of the nozzle visor 54 can guide and restrict the direction of the airflow, causing it to flow in a predetermined direction within the mixing chamber base 2.

[0035] Specifically, the screw pump delivers material through inlet 11 to the air-material mixing chamber 1, where the material mixes with air supplied from the air inlet device 5. During this process, the baffle 6 prevents the material from falling directly into the air inlet device 5 or being blown back into the screw pump by the airflow. Because the baffle 6 is located above the extended nozzle 53 and nozzle cap 54, the material is blocked by the baffle 6 during its descent and can only move towards the outlet 4.

[0036] Specifically, the mixed material gradually moves towards the discharge port 4 within the gas-material mixing box 1 and the mixing box base 2, and is finally discharged from the discharge port 4, completing the conveying process of a large amount of material, and effectively preventing backflow throughout the process.

[0037] In this embodiment, the device, through its rational structural design, can achieve large-volume material conveying in conjunction with the air-material mixing chamber 1 and the screw pump. The screw pump can continuously and stably convey materials into the air-material mixing chamber 1, while the structure of the air-material mixing chamber 1 can accommodate a large amount of material and fully mix it with air, ensuring smooth material conveying.

[0038] In this embodiment, the special structural design of the air intake device 5, with its extended nozzle 53 and nozzle cap 54, enables the incoming air to form a specific airflow direction and velocity distribution. The baffle 6 further prevents the material from being blown back by the airflow, thereby preventing backflow. When the air supply device supplies air into the mixing box base 2, the airflow will not flow back into the screw pump, ensuring the unidirectional transport of materials.

[0039] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-capacity anti-backflow device for a spiral pump, characterized in that: It includes an air-material mixing box (1) located on one side of the spiral pump and a mixing box base (2) installed at the bottom of the air-material mixing box (1). The mixing box base (2) is provided with an air inlet (3) and a discharge outlet (4) on both sides. An air inlet device (5) is installed at the air inlet (3). One end of the air inlet device (5) extends into the interior of the mixing box base (2), and the other end is connected to an air supply device. A baffle (6) is provided between the top of the inner side of the mixing box base (2) and the bottom of the air-material mixing box (1). The air intake device (5) includes a connecting pipe (51) connected to the air supply device. The connecting pipe (51) has a fixing ring (52) connected to one side of the mixing box base (2) on its outside. The other end of the connecting pipe (51) is connected to an extension nozzle (53). The upper half of one end of the extension nozzle (53) is also provided with a nozzle cap (54).

2. The anti-backflow device for a large-capacity spiral pump according to claim 1, characterized in that: The output end cross-sectional dimension of the extended nozzle (53) is smaller than the input end cross-sectional dimension, and the nozzle cap (54) is installed on the upper half of its output end. The overall length of the extended nozzle (53) and the nozzle cap (54) does not exceed the centerline of the mixing box base (2).

3. The anti-backflow device for a large-capacity spiral pump according to claim 1, characterized in that: The baffle (6) is placed above the extended nozzle (53) and the nozzle cap (54), and the baffle (6) is fixed to the mixing box base (2) by angle welding.

4. The anti-backflow device for a large-capacity spiral pump according to claim 1, characterized in that: The gas-material mixing box (1) has an inlet (11) on one side that is connected to the screw pump.

5. A high-capacity anti-backflow device for a spiral pump according to claim 4, characterized in that: The inlet (11) is also surrounded by a positioning connection flange (12) that is connected to the spiral pump.

6. The anti-backflow device for a large-capacity spiral pump according to claim 1, characterized in that: The bottom of the mixing box base (2) is also provided with a support plate (21).

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