Air supply mutual control mechanism for parallel air blowers

Abstract

The air supply mutual control mechanism is characterized in that a vertical section of an air outlet pipe is provided with a pressure-sensitive one-way valve, the pressure-sensitive one-way valve comprises baffle rings, a movable block, a piston and a pressure sensor, the two baffle rings are installed in the air outlet pipe in parallel, the movable block is installed in the air outlet pipe in a sliding mode and located between the two baffle rings, the piston is located in the air outlet pipe, and the pressure sensor is installed in the air outlet pipe. The piston is located above the air outlet hole of the movable block, at least one pressure sensor is installed between the lowest baffle ring and the lower surface of the movable block, and the pressure sensors and the air blower are electrically connected with the PLC. According to the mechanism, the pressure-sensitive one-way valves are installed on the air outlet pipes of the two air blowers, the air supply mutual control function of the two air blowers is achieved, namely after one air blower supplying air breaks down or accidentally stops, the pressure-sensitive one-way valve on the air outlet pipe of the other standby air blower loses pressure brought by airflow, and starting and air supply of the standby air blower are achieved; and meanwhile, the other pressure-sensitive one-way valve is closed, so that the phenomena of surge and mutual interference are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of blowers, in particular to an air supply mutual control mechanism for parallel blowers. Background Art

[0002] Two blowers are connected to the air chute from the homogenizing silo to the bucket elevator section of the kiln inlet, one for use and one for standby. In order to ensure that the air supply of the two blowers does not interfere with each other, check valves are installed on the outlet pipes of the two blowers to prevent the air flow from flowing to the other blower when one blower is working, resulting in resistance and unnecessary losses, and reducing the air volume. For example, in the Chinese utility model patent with the publication number CN220319855U and the name of a double-machine control magnetic levitation blower for anti-surge, check valves are respectively installed on the two exhaust pipes to achieve the above purpose.

[0003] However, the existing technology can only prevent surging and mutual interference when using two blowers, and cannot realize the mutual control function of the two blowers. For example, when one of the blowers in use fails or is accidentally shut down, the other standby blower cannot be immediately and automatically started to intervene in the work, and manual start of the blower is required, resulting in low automation and low work efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an air supply mutual control mechanism for parallel blowers to solve the problem of low work efficiency caused by the lack of mutual control function when two blowers are used in a one-for-one standby mode.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An air supply mutual control mechanism for parallel blowers includes blowers. The outlet pipes of the two blowers are communicated with the main air pipe. A pressure-sensitive check valve is arranged on the vertical section of the outlet pipe. The pressure-sensitive check valve includes a retaining ring, a movable block, a piston and a pressure sensor. The two retaining rings are installed in parallel in the outlet pipe. The movable block is slidably installed in the outlet pipe and is located between the two retaining rings. The piston is located in the outlet pipe and is above the air outlet hole of the movable block. At least one pressure sensor is installed between the lowermost retaining ring and the lower surface of the movable block. The pressure sensor, the blower and the PLC controller are electrically connected.

[0007] A further technical solution is that the piston is spherical.

[0008] A further technical solution is that the maximum diameter of the piston is smaller than the inner diameter of the retaining ring.

[0009] A further technical solution is that the diameter of the air outlet hole is between the minimum diameter and the maximum diameter of the piston.

[0010] A further technical solution is that a retaining rod is arranged in the air outlet pipe above the piston.

[0011] A further technical solution is that a spring is arranged between the lower surface of the movable block and the pressure sensor.

[0012] Compared with the prior art, at least one of the following beneficial effects can be achieved by the present utility model:

[0013] The present utility model provides an air supply mutual control mechanism for a parallel blower. This mechanism can install pressure-sensitive one-way valves on the air outlet pipes of two blowers and, with the help of a PLC controller, achieve the air supply mutual control function of the two blowers. That is, when a blower that is supplying air stops due to a fault or accident, the pressure-sensitive one-way valve on the air outlet pipe of the other standby blower loses the pressure brought by the air flow. Then, the PLC controller can start and supply air to the standby blower, and at the same time, the other pressure-sensitive one-way valve closes to prevent surging and mutual interference. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of an air supply mutual control mechanism for a parallel blower of the present utility model.

[0015] Figure 2 For the present utility model Figure 1 It is a schematic structural diagram of the pressure-sensitive one-way valve in the present utility model.

[0016] Figure 3 For the present utility model Figure 2 It is a schematic structural diagram of another kind.

[0017] Reference numerals: 1, blower; 2, air outlet pipe; 3, main air pipe; 4, pressure-sensitive one-way valve; 5, retaining ring; 6, movable block; 7, piston; 8, pressure sensor; 9, retaining rod; 10, spring. Detailed Embodiments

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0019] Accordingly, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0020] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0021] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0023] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Embodiment 1:

[0025] This embodiment, such as Figure 1 and Figure 2As shown in the figure, an air supply intercontrol mechanism for a parallel blower includes a blower 1. The air outlet pipes 2 of the two blowers 1 are connected to the main air pipe 3. A pressure-sensitive one-way valve 4 is provided on the vertical section of the air outlet pipe 2. The pressure-sensitive one-way valve 4 includes a retaining ring 5, a movable block 6, a piston 7, and a pressure sensor 8. The two retaining rings 5 are installed in parallel in the air outlet pipe 2. The movable block 6 is slidably installed in the air outlet pipe 2 and is located between the two retaining rings 5. The piston 7 is located in the air outlet pipe 2 and is above the air outlet hole of the movable block 6. At least one pressure sensor 8 is installed between the lower surface of the lowermost retaining ring 5 and the lower surface of the movable block 6. The pressure sensor 8, the blower 1, and the PLC controller are electrically connected.

[0026] When starting to work, only one blower 1 needs to be started, which is called the main blower, and the other blower 1 that does not participate in the work is called the standby blower. At this time, the pressure-sensitive one-way valve 4 on the main blower is opened, and the pressure-sensitive one-way valve 4 on the standby blower is closed and bears a certain wind pressure. The PLC controller records the states of both. When the pressure-sensitive one-way valve 4 on the main blower is closed, or when the pressure on the pressure-sensitive one-way valve 4 on the standby blower is insufficient, the PLC controller controls the standby blower to start.

[0027] The specific working mode of the pressure-sensitive one-way valve 4 on the standby blower is as follows: under the weight of the piston 7 and the wind pressure, the lower surface of the movable block 6 will be pressed tightly against the pressure sensor 8. The pressure sensor 8 receives the extrusion, and the pressure caused by this extrusion on the pressure sensor 8 will have a certain range of changes. This range is set in the PLC controller. Once the pressure borne by the pressure sensor 8 is too small or too small within a certain time period, the PLC controller starts to control the standby blower to start. Under the action of the wind force, the other pressure-sensitive one-way valve 4 is closed.

[0028] The specific working mode of the pressure-sensitive one-way valve 4 on the main blower is as follows: when the pressure sensor 8 receives the extrusion, this pressure value is set in the PLC controller. When this pressure value appears or appears within a certain time period, it means that the main blower is not working or the air volume is too small, and the standby blower will also be started.

[0029] The two pressure-sensitive one-way valves 4 work complementarily to jointly achieve the air supply intercontrol effect of the parallel blower 1.

[0030] Preferably, the piston 7 is spherical.

[0031] The spherical piston 7 can roll freely in the air outlet pipe 2 and is well adapted to the air outlet hole.

[0032] Preferably, the maximum diameter of the piston 7 is smaller than the inner diameter of the retaining ring 5.

[0033] Ensure that the piston 7 can seal the air outlet hole through the retaining ring 5.

[0034] Preferably, the diameter of the air outlet hole is between the minimum diameter and the maximum diameter of the piston 7.

[0035] Ensure that the piston 7 seals the air outlet hole.

[0036] Preferably, a retaining rod 9 is provided in the air outlet pipe 2 above the piston 7.

[0037] The retaining rod 9 is used to limit the moving position of the piston 7.

[0038] Preferably, a spring 10 is provided between the lower surface of the movable block 6 and the pressure sensor 8.

[0039] The spring 10 can play a buffering effect, prevent the pressure sensor 8 from being damaged, and can reduce the noise during the operation of the pressure-sensitive one-way valve 4.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An air supply mutual control mechanism for parallel blowers, comprising a blower (1), wherein the air outlet pipes (2) of the two blowers (1) are connected to a main air pipe (3), and characterized in that: The vertical section of the air outlet pipe (2) is provided with a pressure-sensitive one-way valve (4), the pressure-sensitive one-way valve (4) comprising a baffle ring (5), a movable block (6), a piston (7) and a pressure sensor (8), the two baffle rings (5) being installed in parallel in the air outlet pipe (2), the movable block (6) being slidably installed in the air outlet pipe (2) and being located between the two baffle rings (5), the piston (7) being located in the air outlet pipe (2), and the piston (7) being located above the air outlet hole of the movable block (6), at least one pressure sensor (8) being installed between the lowermost baffle ring (5) and the lower surface of the movable block (6), and the pressure sensor (8), the blower (1) and a PLC controller being electrically connected.

2. The air supply mutual control mechanism for parallel blowers according to claim 1, characterized in that: The piston (7) is spherical.

3. The air supply mutual control mechanism for parallel blowers according to claim 1, characterized in that: The maximum diameter of the piston (7) is smaller than the inner diameter of the retaining ring (5).

4. The air supply mutual control mechanism for parallel blowers according to claim 1, characterized in that: The diameter of the air outlet hole is between the minimum diameter and the maximum diameter of the piston (7).

5. The air supply mutual control mechanism for parallel blowers according to claim 1, characterized in that: A shift rod (9) located above the piston (7) is arranged in the air outlet pipe (2).

6. The air supply mutual control mechanism for parallel blowers according to claim 1, characterized in that: A spring (10) is provided between the lower surface of the movable block (6) and the pressure sensor (8).

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