Explosion-proof device and method for pultrusion line dust removal system in wind power industry

Abstract

The invention discloses an explosion-proof device and method for a pultrusion line dust removal system in the wind power industry, and the device comprises a dust removal main body, and further comprises a dust accumulation closed area, a ton bag placement area, a first air cylinder butterfly valve and a second air cylinder butterfly valve, and a dust collection pipeline of the dust removal main body is connected with the dust accumulation closed area; the ton bag containing area is arranged at the bottom of the dust accumulation closed area and communicates with the dust accumulation closed area. An explosion venting channel is further connected between the bottom of the dust accumulation closed area and the top of the ton bag containing area, and the first air cylinder butterfly valve and the second air cylinder butterfly valve are installed in the explosion venting channel in a spaced mode and opened or closed in a staggered mode. The explosion venting channel is arranged between the dust accumulation closed area and the ton bag containing area, the first air cylinder butterfly valve and the second air cylinder butterfly valve are installed in the explosion venting channel in a spaced mode, explosion venting of the dust removal system is achieved, and the explosion hidden danger caused by molecular collision between raised dust is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power, and in particular to an explosion-proof device and method for a dust removal system of a pultrusion line in the wind power industry. Background Art

[0002] In the process of using automatic pultruded beam stacking equipment to process wind turbine blade pultruded sheets into pultruded beam components, dust will be generated, which is usually collected by a dust removal device. The dust removal device uses a pulse fan to generate negative pressure in a fixed period to perform primary absorption of the dust generated by the grinding and cutting modules of the automatic pultruded beam stacking equipment; then the large particles are secondary filtered through a drum filter bag, and finally, under the action of gravity, they are collected by descending layers in the dust accumulation closed area. Since the particles after secondary filtration are smaller than PM2.5, dust will be generated, and the collision between dust molecules will increase the inner wall pressure in the dust accumulation closed area. If the explosion is not vented in time, there is a risk of dust explosion, which will have immeasurable consequences. Summary of the invention

[0003] In view of the defects in the prior art, the purpose of the present invention is to provide an explosion-proof device for a dust removal system of a pultrusion line in the wind power industry.

[0004] Furthermore, the present application also provides an explosion-proof method for a pultrusion line dust removal system in the wind power industry.

[0005] The technical solution adopted by the present invention is:

[0006] An explosion-proof device for a dust removal system of a pultrusion line in the wind power industry comprises a dust removal body, a dust closed area, a ton bag placement area, a first cylinder butterfly valve and a second cylinder butterfly valve. The dust suction pipeline of the dust removal body is connected to the dust closed area. The ton bag placement area is arranged at the bottom of the dust closed area and is communicated with the dust closed area. An explosion relief channel is also connected between the bottom of the dust closed area and the top of the ton bag placement area. The first cylinder butterfly valve and the second cylinder butterfly valve are installed in the explosion relief channel at intervals, and the two are opened or closed alternately.

[0007] Further, the first cylinder butterfly valve is installed above the second cylinder butterfly valve.

[0008] Furthermore, a PLC controller is included, and an output end of the PLC controller is connected to the first cylinder butterfly valve and the second cylinder butterfly valve to control the opening or closing of the first cylinder butterfly valve and the second cylinder butterfly valve.

[0009] Furthermore, it also includes a pressure difference switch, which is installed on the side wall of the dust accumulation closed area and close to its bottom position, and the pressure difference switch is connected to the input end of the PLC controller.

[0010] Further, the PLC controller communicates with the dust removal body to receive a dust removal signal from the dust removal body.

[0011] Furthermore, it also includes a flameless explosion relief device, which is installed on the side wall of the dust accumulation closed area.

[0012] Furthermore, the present application also provides an explosion-proof method for a dust removal system of a pultrusion line in the wind power industry. The method is based on the above-mentioned device and includes dust removal and explosion relief steps.

[0013] The dust removal step specifically includes: opening the dust removal body to perform dust removal operation, keeping the first cylinder butterfly valve and the second cylinder butterfly valve closed, and allowing dust to enter the dust accumulation closed area through the dust suction pipeline;

[0014] The explosion relief step is specifically as follows: opening the first cylinder butterfly valve, keeping the second cylinder butterfly valve closed, and allowing dust to enter the explosion relief channel from the dust accumulation closed area;

[0015] The first cylinder butterfly valve is closed, and the second cylinder butterfly valve is opened at the same time, so that the dust enters the ton bag placement area through the explosion relief channel;

[0016] Close the second cylinder butterfly valve to complete an explosion relief cycle.

[0017] Furthermore, before the explosion venting step, a pressure monitoring step is also included:

[0018] The pressure monitoring step is specifically as follows: obtaining the pressure in the dust accumulation closed area; when the pressure in the dust accumulation closed area is greater than a threshold value of a pressure difference switch, the pressure difference switch is closed, and the explosion relief step is performed.

[0019] Further, the opening and closing of the first cylinder butterfly valve and the second cylinder butterfly valve are controlled by a PLC controller.

[0020] Furthermore, the opening and closing of the first cylinder butterfly valve and the second cylinder butterfly valve are manually controlled.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0023] Figure 1This is a schematic diagram of the structure of an explosion-proof device for a dust removal system of a pultrusion line in the wind power industry provided in an embodiment of the present application.

[0024] Among them, there are dust suction pipeline 1, dust accumulation closed area 2, flameless explosion relief device 3, first cylinder butterfly valve 4, second cylinder butterfly valve 5, ton bag placement area 6, PLC controller 7, and pressure difference switch 8. DETAILED DESCRIPTION

[0025] The following embodiments of the technical solution of the present invention are described in detail in conjunction with specific embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0026] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0027] Example 1

[0028] See also Figure 1 The present application provides an explosion-proof device for a dust removal system of a pultrusion line in the wind power industry, comprising a dust removal body, a dust closed area 2, a ton bag placement area 6, a first cylinder butterfly valve 4 and a second cylinder butterfly valve 5. The dust suction pipeline 1 of the dust removal body is connected to the dust closed area 2, and the ton bag placement area 6 is arranged at the bottom of the dust closed area 2 and is connected to the dust closed area 2; an explosion relief channel is also connected between the bottom of the dust closed area 2 and the top of the ton bag placement area 6, and the first cylinder butterfly valve 4 and the second cylinder butterfly valve 5 are installed in the explosion relief channel at intervals, and the two are opened or closed alternately.

[0029] The present application sets an explosion relief channel between the dust closed area 2 and the ton bag placement area 6, and installs the first cylinder butterfly valve 4 and the second cylinder butterfly valve 5 at intervals in the explosion relief channel, so that there is a certain space between the first cylinder butterfly valve 4 and the second cylinder butterfly valve 5. During dust removal, the first cylinder butterfly valve 4 and the second cylinder butterfly valve 5 remain in a closed state, and the dust enters the dust closed area 2 from the dust suction pipeline 1 under the action of the dust removal body. The first cylinder butterfly valve 4 is opened, and the dust can enter the explosion relief channel from the dust closed area 2. Then the second cylinder butterfly valve 5 is opened, and the first cylinder butterfly valve 4 is closed at the same time. The dust in the explosion relief channel falls into the ton bag placement area 6 for collection, thereby realizing the explosion relief of the dust removal system and avoiding the explosion hazard caused by the collision of dust molecules.

[0030] The dust removal body is used for primary adsorption and secondary filtration of dust. The dust closed area 2 is the activity area after the dust is primarily adsorbed and collected. A dust gas inlet is provided on the dust closed area 2, which is connected to one end of the dust suction pipeline 1 of the dust removal body. The other end of the dust suction pipeline 1 is connected to the grinding or cutting component on the automatic pultrusion beam stacking equipment. The negative pressure generated by the pulse fan of the dust removal body performs primary adsorption on the dust and then enters the dust closed area 2 for collection.

[0031] The first cylinder butterfly valve 4 and the second cylinder butterfly valve 5 are used to connect or block the dust accumulation closed area 2 and the explosion relief channel, and the explosion relief channel and the ton bag placement area 6; the first cylinder butterfly valve 4 is installed above the second cylinder butterfly valve 5; in this embodiment, the first cylinder butterfly valve 4 is installed at the top of the explosion relief channel, and the second cylinder butterfly valve 5 is installed at the bottom of the explosion relief channel; when the pressure is released, the first cylinder butterfly valve 4 is opened first to allow the dust to fall into the explosion relief channel; then the first cylinder butterfly valve 4 is closed, and the second cylinder butterfly valve 5 is opened at the same time, so that the dust in the explosion relief channel falls into the ton bag placement area 6 for collection, realizing one explosion relief cycle, and this cycle is repeated until the dust removal is completed.

[0032] The opening and closing of the first cylinder butterfly valve 4 and the second cylinder butterfly valve 5 can be controlled manually or by the PLC controller 7 .

[0033] In one embodiment, a PLC controller 7 is further included, and an output end of the PLC controller 7 is connected to the first cylinder butterfly valve 4 and the second cylinder butterfly valve 5 to control the opening or closing of the first cylinder butterfly valve 4 and the second cylinder butterfly valve 5 to achieve automatic explosion relief.

[0034] In order to determine the explosion relief timing, a pressure differential switch 8 is also included. The pressure differential switch 8 is installed on the side wall of the dust closed area 2 and close to its bottom. The pressure differential switch 8 is connected to the input end of the PLC controller 7.

[0035] The pressure differential switch 8 is used to sense the real-time pressure inside the dust closed area 2. When the pressure inside the dust closed area 2 increases to the threshold of the pressure differential switch 8, the pressure differential switch 8 is closed and a signal is sent to the PLC controller 7. The PLC controller 7 controls the first cylinder butterfly valve 4 and the second cylinder butterfly valve 5 to open or close alternately to perform explosion relief operation.

[0036] The PLC controller 7 also communicates with the dust removal body to receive the dust removal signal of the dust removal body, so that the explosion relief operation can be linked with the dust removal operation.

[0037] By setting the PLC controller 7, automatic explosion relief operation can be performed through program setting.

[0038] In order to prevent the risk of explosion caused by the failure of the electrical explosion relief function, the present application also includes a flameless explosion relief device 3, which is installed on the side wall of the dust closed area 2; when the pressure generated by a large number of dust particles colliding with the inner wall in the dust closed area 2 is too large, the pressure can force the flameless explosion relief device 3 to open, allowing the dust to leak out, and the internal pressure is instantly reduced to normal atmospheric pressure.

[0039] By adopting the above technical solution, the device of this embodiment can detect the pressure in the dust closed area 2 through the built-in pressure difference switch 8 within a fixed period, and control the two pneumatic butterfly valves to perform staggered actions through manual or PLC controller 7, so that the dust closed area 2 has the functions of collecting, relieving pressure, and separating dust, thereby ensuring the safety of the dust removal system.

[0040] The PLC controller 7 communicates with the dust removal body. After the communication handshake, the device enters the automatic operation state. Within a fixed period, a pair of pneumatic butterfly valve cylinders are controlled by the pressure difference switch 8 to perform staggered actions, so that the dust circulates in the collection-layer reduction-explosion relief.

[0041] By setting up the mechanical flameless explosion relief device 3, when the actuator fails electrically, the collision between molecules inside the dust closed area 2 generates huge pressure to push open the flameless explosion relief device 3, so that the dust closed area 2 and the air atmospheric pressure form a connecting vessel, thereby achieving air pressure relief.

[0042] Example 2

[0043] This embodiment provides an explosion-proof method for a dust removal system of a pultrusion line in the wind power industry. The method is based on the device of Embodiment 1 and includes dust removal and explosion relief steps.

[0044] The dust removal step is specifically as follows: the dust removal body is opened to perform dust removal operation, the first cylinder butterfly valve 4 and the second cylinder butterfly valve 5 remain closed, and the dust enters the dust accumulation closed area 2 through the dust suction pipeline 1.

[0045] The specific steps for explosion relief are:

[0046] S1. Open the first cylinder butterfly valve 4, keep the second cylinder butterfly valve 5 closed, and the dust enters the explosion relief channel from the dust accumulation closed area 2.

[0047] S2. Close the first cylinder butterfly valve 4 and open the second cylinder butterfly valve 5 at the same time, and the dust enters the ton bag placement area 6 through the explosion relief channel.

[0048] S3, close the second cylinder butterfly valve 5, completing an explosion relief cycle.

[0049] Before the explosion venting step, there is also a pressure monitoring step:

[0050] The pressure monitoring step is specifically as follows: obtaining the pressure in the dust closed area 2; when the pressure in the dust closed area 2 is greater than the threshold of the pressure difference switch 8, the pressure difference switch 8 is closed, and the explosion relief step is performed.

[0051] In one embodiment, the opening and closing of the first cylinder butterfly valve 4 and the second cylinder butterfly valve 5 are controlled by a PLC controller 7 .

[0052] In another embodiment, the opening and closing of the first cylinder butterfly valve 4 and the second cylinder butterfly valve 5 are manually controlled.

[0053] When the fan of the pulse dust collector is turned on, the signal between the dust collector and the PLC controller 7 is connected, and the device can be selected through three gears: "manual" / "0" / "automatic".

[0054] When the "manual" gear is selected, the PLC controller 7 does not control the two cylinder butterfly valves, and the opening and closing of the two are controlled manually.

[0055] When the "0" gear is selected, the first cylinder and the second cylinder are both in the open state, and no explosion relief operation is performed.

[0056] When the "automatic" mode is selected, in the initial state, the two cylinder butterfly valves are in the closed state (the cylinder is in the "lifting" state). When the pressure difference switch 8 sensor is closed, the cylinder of the first cylinder butterfly valve 4 contracts, the first cylinder butterfly valve 4 opens, and the device enters the dust collection state, and the dust enters the explosion relief channel from the dust accumulation closed area 2; after collecting for T minutes (T is the preset number of minutes), the cylinder of the second cylinder butterfly valve 5 contracts and is in the open state, and at the same time, the cylinder of the first cylinder butterfly valve 4 is lifted and is in the closed state, and the device enters the dust explosion relief state, and the dust falls from the explosion relief channel into the ton bag placement area 6; the above operations are repeated in this way to achieve the dust explosion relief function.

[0057] In this application, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and the like 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 an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the specification of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, systems and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, systems, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, systems, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An explosion-proof device for dust removal system of pultrusion line in wind power industry, including a dust removal body, characterized in that: It also includes a dust closed area, a ton bag placement area, a first cylinder butterfly valve and a second cylinder butterfly valve. The dust suction pipeline of the dust removal body is connected to the dust closed area. The ton bag placement area is arranged at the bottom of the dust closed area and is communicated with the dust closed area. An explosion relief channel is also connected between the bottom of the dust closed area and the top of the ton bag placement area. The first cylinder butterfly valve and the second cylinder butterfly valve are installed in the explosion relief channel at intervals, and the two are opened or closed alternately.

2. The explosion-proof device for dust removal system of pultrusion line in wind power industry according to claim 1 is characterized in that: The first cylinder butterfly valve is installed above the second cylinder butterfly valve.

3. The explosion-proof device for dust removal system of pultrusion line in wind power industry according to claim 2 is characterized in that: It also includes a PLC controller, the output end of which is connected to the first cylinder butterfly valve and the second cylinder butterfly valve to control the opening or closing of the first cylinder butterfly valve and the second cylinder butterfly valve.

4. The explosion-proof device for dust removal system of pultrusion line in wind power industry according to claim 3 is characterized in that: It also includes a pressure difference switch, which is installed on the side wall of the dust accumulation closed area and close to its bottom position. The pressure difference switch is connected to the input end of the PLC controller.

5. The explosion-proof device for dust removal system of pultrusion line in wind power industry according to claim 3 is characterized in that: The PLC controller communicates with the dust removal body to receive a dust removal signal from the dust removal body.

6. The explosion-proof device for dust removal system of pultrusion line in wind power industry according to claim 1 is characterized in that: It also includes a flameless explosion relief device, which is installed on the side wall of the dust accumulation closed area.

7. Explosion-proof method for dust removal system of pultrusion line in wind power industry, characterized in that: The method is based on the device according to any one of claims 1 to 6, and comprises dust removal and explosion relief steps. The dust removal step specifically includes: opening the dust removal body to perform dust removal operation, keeping the first cylinder butterfly valve and the second cylinder butterfly valve closed, and allowing dust to enter the dust accumulation closed area through the dust suction pipeline; The explosion relief step is specifically as follows: opening the first cylinder butterfly valve, keeping the second cylinder butterfly valve closed, and allowing dust to enter the explosion relief channel from the dust accumulation closed area; The first cylinder butterfly valve is closed, and the second cylinder butterfly valve is opened at the same time, so that the dust enters the ton bag placement area through the explosion relief channel; Close the second cylinder butterfly valve to complete an explosion relief cycle.

8. The explosion-proof method for dust removal system of pultrusion line in wind power industry according to claim 7 is characterized in that: Before the explosion venting step, a pressure monitoring step is also included: The pressure monitoring step is specifically as follows: obtaining the pressure in the dust accumulation closed area; when the pressure in the dust accumulation closed area is greater than a threshold value of a pressure difference switch, the pressure difference switch is closed, and the explosion relief step is performed.

9. The explosion-proof method for dust removal system of pultrusion line in wind power industry according to claim 7 is characterized in that: The opening and closing of the first cylinder butterfly valve and the second cylinder butterfly valve are controlled by a PLC controller.

10. The explosion-proof method for dust removal system of pultrusion line in wind power industry according to claim 7 is characterized in that: The opening and closing of the first cylinder butterfly valve and the second cylinder butterfly valve are manually controlled.

Images