Control valve, gas transportation system, transportation method and cleaning method thereof

Abstract

The present invention relates to a control valve and its piping system, and more specifically to a control valve, a gas transport system, a gas transport method, and a cleaning method thereof. The invention aims to address the shortcomings of the prior art, which require multiple valves to control multiple outlets. When controlling multiple valves simultaneously, it is difficult to detect valve failures, and the control system is complex. A control valve according to the present invention comprises a valve body, a baffle disposed in the valve body, a first inlet disposed on the valve body on one side of the baffle, at least two outlets disposed on the valve body on the other side of the baffle, and a drive unit for driving the baffle to rotate. A through hole is provided on the baffle, and the drive unit drives the baffle to rotate in a mounting groove. The outlets are all disposed on the path of the through hole as the baffle rotates. The gas transport system according to the present invention comprises at least one such control valve, an inner tube for gas transport, and two outer tubes disposed on either side of the inner tube.

Description

Technical Field

[0001] The invention relates to a control valve and a piping system thereof, and in particular to a control valve for transporting dust-laden gas, a gas transport system and a transport method and a cleaning method thereof. Background Art

[0002] When controlling the flow or transmission of gas or liquid, direct control is often performed using solenoid valves or other control valves. While this type of control is precise, it requires the solenoid valve to be constantly opened and closed. Multiple valves are required for control when there are multiple branches. If a valve has a problem, without careful inspection, the problem may not be discovered in time due to excessive switching frequency, impacting the normal operation of the system. Existing intelligent control systems, such as PLCs, require simultaneous control of multiple valves to achieve regular opening control. Three-way valves, on the other hand, implement simultaneous one-input, multiple-output control. It is difficult to achieve regular opening control of multiple inputs and outputs with a single control, thus making the control system in the transportation system more complex. Summary of the Invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art that multiple outlets need to be controlled by multiple valves, it is difficult to detect valve failure when controlling multiple valves at the same time, and the control system is complicated, and to provide a control valve, a gas transportation system and its transportation method and cleaning method.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A control valve is special in that it includes a valve body, a baffle arranged in the valve body, a first inlet arranged on the valve body on one side of the baffle, at least two control outlets arranged on the valve body on the other side of the baffle, and a driving unit for driving the baffle to rotate; a mounting groove for mounting the baffle is provided in the valve body, an inlet chamber is provided at a position of the valve body close to one side of the baffle, and the inlet chamber is connected with the first inlet; a through hole is provided on the baffle, and the driving unit drives the baffle to rotate in the mounting groove; the control outlets are all provided on the valve body at positions corresponding to the paths of the through holes as the baffle rotates, and during the rotation of the baffle, the inlet chamber is respectively connected with each control outlet through the through holes; a second inlet is also provided on the valve body on the other side of the baffle, and the second inlet is provided with a one-way valve and is connected with each control outlet at the same time.

[0006] Furthermore, the cross section of the baffle is circular, and gear teeth extend radially from the outer periphery. The output end of the driving unit is connected to a driving gear, which meshes with the gear teeth of the baffle. The driving unit drives the baffle to rotate through the driving gear.

[0007] Furthermore, the driving unit is a motor.

[0008] The present invention also provides a gas transportation system, which is special in that it includes at least one of the above-mentioned control valves, an inner tube for gas transportation, and two outer tubes respectively arranged on both sides of the inner tube; each of the outer tubes is connected to at least one control outlet of the control valve; multiple gas channels are arranged between the inner tube and the outer tubes on both sides, the inlet end of the gas channel is connected to the outer tube, and the outlet end is connected to the inner tube, the angle between the central axis of the gas channel and the central axis of the inner tube is less than 90°, and the outlet end of the gas channel is facing the outlet direction of the inner tube.

[0009] Furthermore, the angle between the central axis of the gas channel and the central axis of the inner tube is 25-40°.

[0010] Furthermore, the gas channels are symmetrically arranged along the axis of the inner tube.

[0011] Furthermore, the control valve has an even number of control outlets, and the numbers of control outlets connected to the external pipes on both sides are the same.

[0012] The present invention also provides a transportation method of the above-mentioned gas transportation system, which is special in that it includes the following steps:

[0013] S1. A control gas is introduced into the second inlet, and the control gas enters the outer tube along the multiple control outlets of the control valve, and then enters the inner tube through the gas channel;

[0014] S2. Control the gas to be transported to enter the inner tube from the inner tube inlet, and control the pressure of the control gas entering the outer tube through the second inlet to be greater than the pressure of the transport gas in the inner tube, so that the gas to be transported is output from the outlet of the inner tube to achieve gas transportation.

[0015] At the same time, the present invention also provides a cleaning method for the above-mentioned gas transportation system, characterized in that the cleaning method comprises the following steps:

[0016] S1. Control the drive unit to drive the baffle to rotate, and introduce a cleaning gas into the first inlet; the cleaning gas pressure is greater than the control gas pressure introduced into the second inlet, and the control gas pressure introduced into the second inlet is greater than the pressure of the transport gas in the inner tube;

[0017] Alternatively, the second inlet and the inlet of the inner tube are closed simultaneously, cleaning gas is introduced into the first inlet, and the driving unit is controlled to drive the baffle to rotate;

[0018] S2. The cleaning gas is alternately delivered to the outer tube of the pipe to be cleaned through the control outlet of the control valve by rotating the baffle, and then enters the inner tube through the gas channel;

[0019] S3. The cleaning gas enters the inner tube and directly acts on the inner wall of the inner tube to impact the attachments adhering to the inner tube, causing them to fall off and be discharged through the outlet of the inner tube.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The control valve of the present invention is provided with a baffle, and a first inlet is provided on one side of the baffle, and at least two outlets are provided on the other side. The first inlet is connected to each outlet in sequence by rotating the baffle. The frequency of each outlet connecting to the inlet can be controlled by controlling the rotation speed of the baffle by the driving unit. There is no need to set up multiple solenoid valves or other control units to control the connection frequency of the outlet. The structure is simple and the assembly is compact. The control valve formed is relatively small in size and easy to control. The baffle connects each outlet in sequence by rotation, and the rotation direction is consistent. There is no reciprocating motion. Therefore, the resistance to be overcome during the movement is small, the energy consumption is small, and the work efficiency is higher. During the rotation of the baffle, the through hole can only correspond to one outlet, and the other outlets are closed. Through this structure and movement mode, it can be ensured that the control valve only opens one outlet at a time.

[0022] 2. The present invention applies a control valve to a gas transportation system. A second inlet is also provided on the control valve. Gas is continuously introduced through the second inlet, and the pressure of the outer tube is ensured to be greater than the pressure of the transported gas in the inner tube, so that the transported gas is always in the inner tube and will not overflow; when the transported gas contains dust, the dust concentration is too high and may cause the inner tube transportation to be blocked or the speed to slow down. At this time, the control gas introduced through the second inlet has a higher pressure and can enter the inner tube along the gas channel, so that the dust in the transported gas in the inner tube oscillates, avoiding blockage in the inner tube.

[0023] 3. The control valve provided in the gas transport pipeline of the present invention can not only promote the smooth transport of dust-laden gas, but also use the control valve to clean the pipeline. Cleaning gas is introduced into the first inlet, so that the cleaning gas enters the inner tube, acts on the inner tube wall to impact the dust or aerosol adhering to the tube wall, causing it to fall off. This process can be carried out when the pipeline is not transporting gas, or it can be carried out during the process of gas transport in the inner tube, without affecting the transportation process; the cleaning gas rotates through the outer tubes and gas channels on both sides through the provided baffle to enter the inner tube alternately, avoiding the generation of collision in the inner tube when entering at the same time, weakening the airflow, and making the cleaning force insufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 1. It is a schematic diagram of the three-dimensional structure of an embodiment of a control valve of the present invention;

[0025] Figure 2 This is a schematic structural diagram of an embodiment of a control valve of the present invention with a partial valve body removed;

[0026] Figure 3 is an exploded view of an embodiment of a control valve of the present invention (the valve body is not shown in the figure);

[0027] Figure 4is a schematic diagram of the connection structure of an embodiment of a gas transportation system of the present invention;

[0028] Figure 5 yes Figure 4 A-direction view;

[0029] Figure 6 Schematic diagram of the structure of an embodiment of the gas transportation system of the present invention (partial valve body removed, inner and outer tubes are axially cross-sectionally viewed);

[0030] Figure 7 yes Figure 5 Schematic diagram of the structure of the inner and outer tubes along the axial section with part of the valve body removed.

[0031] Description of reference numerals:

[0032] 100-valve body, 110-mounting groove, 210-first inlet, 220-control outlet, 230-inlet chamber, 240-second inlet, 300-baffle, 310-through hole, 320-gear teeth, 400-driving gear, 500-drive unit, 600-control valve, 700-inner tube, 710-inner tube inlet, 720-gas channel, 800-outer tube. DETAILED DESCRIPTION

[0033] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments:

[0034] A control valve of the present invention is as follows Figures 1 to 3 As shown, it includes a valve body 100, a baffle 300 arranged in the valve body 100, a first inlet 210 arranged on the valve body 100 on one side of the baffle 300, at least two control outlets 220 arranged on the valve body 100 on the other side of the baffle 300, and a driving unit 500 for driving the baffle 300 to rotate; the valve body 100 is provided with a mounting groove 110 for mounting the baffle 300, and the valve body 100 is provided with an inlet cavity 230 at a position close to one side of the baffle 300. The inlet cavity 230 is sealed with one side of the baffle 300 through the valve body 100 and is connected to the first inlet 210; the valve body 100 located on the other side of the baffle 300 is also provided with a second inlet 240, and the second inlet 240 is provided with a one-way valve and is connected to each control outlet 220 at the same time.

[0035] A through hole 310 is provided on the baffle 300, and the driving unit 500 drives the baffle 300 to rotate in the mounting groove 110; the control outlets 220 are all arranged on the valve body 100 at positions corresponding to the paths along which the through holes 310 rotate as the baffle 300 rotates. During the rotation of the baffle 300, the inlet chamber 230 is respectively connected to each control outlet 220 through the through holes 310.

[0036] The baffle 300 has a circular cross-section, and gear teeth 320 extend radially from the outer periphery. The output end of the drive unit 500 is connected to a driving gear 400, which meshes with the gear teeth 320 of the baffle 300. The drive unit 500 drives the baffle 300 to rotate via the driving gear 400. The meshing transmission method is adopted, with a compact connection structure, a constant transmission ratio, and high accuracy. The linear speed during transmission can reach 40 meters per second, the transmission ratio can reach 10, and the transmission efficiency can reach 98%.

[0037] In this embodiment, the driving unit 500 adopts a motor. In other embodiments of the present invention, other driving units 500 and transmission devices, such as chain drive or belt drive, may also be adopted.

[0038] In other embodiments of the present invention, multiple control outlets 220 may also be provided along the movement path of the through hole 310 , and the movement of the through hole 310 can realize control of the communication between the multiple control outlets 220 and the inlet.

[0039] The present invention provides a gas transportation system such as Figures 4 to 7 As shown, it includes the above-mentioned control valve 600, an inner tube 700 for gas transportation, and two outer tubes 800 respectively arranged on both sides of the inner tube 700; each of the outer tubes 800 is connected to at least one control outlet 220 of the control valve 600, and multiple gas channels 720 are arranged between the inner tube 700 and the outer tubes 800 on both sides thereof. The inlet end of the gas channel 720 is connected to the outer tube 800, and the outlet end is connected to the inner tube 700. The angle between the central axis of the gas channel 720 and the central axis of the inner tube 700 is less than 90°, and the outlet end of the gas channel 720 is facing the outlet direction of the inner tube; the gas transportation system of the present invention is more suitable for the transportation of dust-containing gas or aerosol-containing gas.

[0040] In the present invention, the conveying and cleaning effects are better when the angle between the central axis of the gas channel 720 and the central axis of the inner tube 700 is between 25° and 40°. When the conveyed gas contains larger dust particles or a higher concentration, the smaller the angle of the central axis, the smaller the angle between the control gas entering the inner tube 700 from the gas channel 720 and the inner tube 700. While causing the dust to oscillate, it also provides thrust toward the inner tube outlet, which helps to convey the gas and dust. At the same time, the clean gas impacts the attachments adhered to the inner tube 700 at a smaller angle, making it easier to make them fall off. When the gas contains smaller dust particles or a lower concentration, a larger angle of the central axis can also achieve better effects.

[0041] In other embodiments of the present invention, multiple control valves 600 may be provided, and the control outlets 220 of the control valves 600 may be connected to the outer tubes 800 on both sides, respectively. Alternatively, the control outlets 220 of the same control valve 600 may be connected to the outer tube 800 on the same side, ensuring that the same number of control outlets 220 are connected to the outer tubes 800 on both sides. In other embodiments of the present invention, the control valve 600 may have multiple, preferably even, control outlets 220, and the same number of control outlets 220 are connected to the outer tubes 800 on both sides.

[0042] A gas transportation method of the present invention utilizes the above-mentioned gas transportation system, wherein the gas to be transported is dust-laden gas. During use, the inner tube inlet 710 and the outlet of the inner tube 700 are connected to upstream and downstream equipment, respectively. A cleaning gas and a control gas are connected to the first inlet 210 and the second inlet 240, respectively. The gas transportation method comprises the following steps:

[0043] S1. The control gas is introduced into the second inlet 240, and the control gas enters the outer tube 800 of the gas transport system along the multiple control outlets 220 of the control valve 600, and then enters the inner tube 700 through the gas channel 720;

[0044] S2. Control the gas to be transported to enter the inner tube 700 from the inner tube inlet 710, and control the pressure of the control gas entering the outer tube 800 through the second inlet 240 to be greater than the pressure of the transport gas in the inner tube 700, so as to avoid excessive pressure in the inner tube 700 and dust-laden gas overflowing into the outer tube 800, so that the gas to be transported is output from the outlet of the inner tube 700 to realize gas transportation.

[0045] The gas transportation method uses the above-mentioned gas transportation system, and continuously introduces control gas through the second inlet 240 of the control valve 600, so that the dust in the transportation gas of the inner tube 700 oscillates, avoiding accumulation and blockage in the inner tube 700.

[0046] During transportation, the inner tube 700 is cleaned at the same time. The cleaning method includes the following steps:

[0047] S1. Control the drive unit 500 to drive the baffle 300 to rotate, and introduce a cleaning gas into the first inlet 210; the pressure of the cleaning gas is greater than the control gas pressure introduced into the second inlet 240, and the control gas pressure introduced into the second inlet 240 is greater than the pressure of the transport gas in the inner tube 700;

[0048] S2. The cleaning gas is rotated through the baffle 300 so that it is alternately delivered through the control outlet 220 of the control valve 600 to the outer tube 800 of the pipe to be cleaned and then enters the inner tube 700 through the gas passage 720;

[0049] S3. The cleaning gas enters the inner tube 700 and directly acts on the inner wall of the inner tube 700 to impact the attachments adhering to the inner tube 700, causing them to fall off and be discharged along the outlet of the inner tube 700.

[0050] The cleaning gas rotates through the baffle 300 and alternately passes through the outer tubes 800 on both sides and the gas channel 720 to enter the inner tube 700, avoiding the collision in the inner tube 700 when entering at the same time, weakening the airflow and making the cleaning force insufficient; the alternating frequency of the cleaning gas entering the outer tubes 800 on both sides can be adjusted by adjusting the speed of the motor of the drive unit 500.

[0051] When the transport system is shut down, the inner tube 700 may also be cleaned. The difference between the cleaning step and the above cleaning step is only in step S1. Step S1 is specifically as follows:

[0052] At the same time, the second inlet 240 and the inlet of the inner tube 700 are closed, the cleaning gas is introduced into the first inlet 210 , and the driving unit 500 is controlled to drive the baffle 300 to rotate.

Claims

1. A gas transportation system, characterized in that: It comprises at least one control valve (600), an inner tube (700) for gas transportation, and two outer tubes (800) respectively arranged on both sides of the inner tube (700); The control valve (600) comprises a valve body (100), a baffle (300) disposed in the valve body (100), a first inlet (210) disposed on the valve body (100) on one side of the baffle (300), at least two control outlets (220) disposed on the valve body (100) on the other side of the baffle (300), and a driving unit (500) for driving the baffle (300) to rotate. The valve body (100) is provided with a mounting groove (110) for mounting the baffle (300), and an inlet cavity (230) is provided on a side of the valve body (100) close to the baffle (300), and the inlet cavity (230) is communicated with the first inlet (210); The baffle (300) is provided with a through hole (310), and the driving unit (500) drives the baffle (300) to rotate in the mounting groove (110); the control outlets (220) are all arranged on the valve body (100) at positions corresponding to the path of the through hole (310) along which the baffle (300) rotates; during the rotation of the baffle (300), the inlet chamber (230) is respectively communicated with each control outlet (220) through the through hole (310); A second inlet (240) is further provided on the valve body (100) on the other side of the baffle (300). The second inlet (240) is provided with a one-way valve and is connected to each control outlet (220). Each of the outer tubes (800) is in communication with at least one control outlet (220) of the control valve (600); A plurality of gas channels (720) are provided between the inner tube (700) and the outer tubes (800) on both sides. The inlet end of the gas channel (720) is connected to the outer tube (800), and the outlet end is connected to the inner tube (700). The angle between the central axis of the gas channel (720) and the central axis of the inner tube (700) is less than 90°, and the outlet end of the gas channel (720) faces the outlet direction of the inner tube.

2. The gas transportation system according to claim 1, characterized in that: The baffle (300) has a circular cross-section, and gear teeth (320) extend radially from the outer periphery. The output end of the driving unit (500) is connected to a driving gear (400), and the driving gear (400) is meshed with the gear teeth (320) of the baffle (300). The driving unit (500) drives the baffle (300) to rotate via the driving gear (400).

3. The gas transportation system according to claim 1 or 2, characterized in that: The driving unit (500) is a motor.

4. The gas transportation system according to claim 3, characterized in that: The included angle between the central axis of the gas channel (720) and the central axis of the inner tube (700) is 25-40°.

5. The gas transportation system according to claim 4, characterized in that: The gas channels (720) are symmetrically arranged along the axis of the inner tube (700).

6. The gas transportation system according to claim 5, characterized in that: The control outlets (220) of the control valve (600) are an even number, and the control outlets (220) communicating with the outer tubes (800) on both sides are the same in number.

7. A method for transporting a gas transport system according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. A control gas is introduced into the second inlet (240), and the control gas enters the outer tube (800) along the multiple control outlets (220) of the control valve (600), and then enters the inner tube (700) through the gas channel (720); S2. Control the gas to be transported to enter the inner tube (700) from the inner tube inlet (710), and control the pressure of the control gas entering the outer tube (800) through the second inlet (240) to be greater than the pressure of the transport gas in the inner tube (700), so that the gas to be transported is output from the outlet of the inner tube (700), thereby realizing gas transportation.

8. A method for cleaning a gas transportation system according to any one of claims 1 to 6, characterized in that: The cleaning method includes the following steps: S1. Controlling the driving unit (500) to drive the baffle (300) to rotate, and introducing a cleaning gas into the first inlet (210); the pressure of the cleaning gas is greater than the pressure of the control gas introduced into the second inlet (240), and the pressure of the control gas introduced into the second inlet (240) is greater than the pressure of the conveying gas in the inner tube (700); Alternatively, the second inlet (240) and the inlet of the inner tube (700) are closed simultaneously, cleaning gas is introduced into the first inlet (210), and the driving unit (500) is controlled to drive the baffle (300) to rotate; S2. The baffle (300) rotates to allow the cleaning gas to pass through the through hole (310) and alternately be delivered to the outer pipe (800) of the pipeline to be cleaned through the control outlet (220) of the control valve (600), and then enter the inner pipe (700) through the gas channel (720); S3. The cleaning gas enters the inner tube (700) and directly acts on the inner wall of the inner tube (700) to impact the attachments adhering to the inner tube (700), causing them to fall off and be discharged along the outlet of the inner tube (700).

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