Split type explosion-proof injection device

Abstract

The utility model discloses a split type explosion-proof injection device, and relates to the field of injection separation. The blowing device comprises a valve terminal which is fixed at the bottom of the inner cavity of the explosion-proof box, has a circular-inside and square-outside cross section and has two ends connected with the air inlet joint, and electromagnetic valves which are assembled on the upper surface of the valve terminal side by side and have inlet ends communicated with the inner cavity of the valve terminal; the inlet end of the integrated nozzle is correspondingly communicated with the outlet end of each group of electromagnetic valves through a connecting air pipe and an exhaust joint. According to the utility model, the integrated nozzle and the explosion-proof box can be mounted in a partitioned and split manner, the electrical part of the electromagnetic valve can be effectively isolated from the external environment of the explosion-proof box, the explosion of an explosive mixture outside the shell caused by explosion in the shell of the explosion-proof box is avoided, and the explosion-proof purpose is further achieved. Meanwhile, the operation environment and the maintenance environment of the electromagnetic valve are improved, the fault rate of the electromagnetic valve is reduced, and the service life of the electromagnetic valve is prolonged. In addition, the device has the advantages of being convenient to install, disassemble and overhaul.

Description

Technical Field

[0001] This utility model relates to the technical field of jet-blowing sorting, and more specifically to a split-type explosion-proof jet-blowing device, which is particularly suitable for use in coal, non-ferrous metals and other mining industries or in hazardous explosive environments. Background Technology

[0002] Due to its high sorting accuracy, wide applicable particle size range, high degree of automation, low operating cost of dry sorting, environmental protection and energy saving, and high efficiency, jet pulverization separation technology has been widely used in recent years for the sorting of block materials in mines, including the coal washing industry.

[0003] Due to the unique environment of the coal washing and processing industry, with its high levels of dust and the release of flammable and explosive gases such as methane during coal production, the pulse-jet separation equipment used in coal operations urgently needs to incorporate explosion-proof capabilities. This is both a customer requirement and an inevitable trend in industry development. However, current traditional pulse-jet separation systems are mostly integrated designs installed in the limited space below the head of the separation belt. Limited by their structure and confined installation space, traditional pulse-jet systems cannot directly incorporate explosion-proof components to achieve explosion protection. Furthermore, maintenance is difficult, and the operating environment is relatively harsh. This harsh environment also leads to a high failure rate of solenoid valves, resulting in high system operating costs. These are all technical problems that urgently need to be solved for the application of traditional pulse-jet systems in the coal industry. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the existing technology by providing a separate explosion-proof spraying device. This invention allows for the separate installation of the integrated nozzle and the explosion-proof enclosure, effectively isolating the electrical components of the solenoid valve from the external environment of the enclosure. This prevents the explosion of the external explosive mixture in the event of an explosion inside the enclosure, thus achieving explosion protection. Simultaneously, this invention significantly improves the operating and maintenance environment of the solenoid valve, reducing its failure rate and extending its service life. Furthermore, this invention enables the assembly of the solenoid valve and allows for quick assembly or disassembly of the integrated nozzle and the explosion-proof enclosure, offering advantages such as easy installation, easy disassembly, and convenient maintenance.

[0005] The objective of this utility model can be achieved through the following technical measures:

[0006] This utility model discloses a split-type explosion-proof jetting device, comprising explosion-proof boxes installed on both sides of the sorting machine frame (on the one hand, the solenoid valve is assembled on the upper surface of the valve island and then fixed as a whole to the bottom of the inner cavity of the explosion-proof box; in this way, the integrated nozzle is installed separately from the explosion-proof box through the connecting air duct, which can effectively isolate the electrical part of the solenoid valve from the external environment of the explosion-proof box; when the solenoid valve coil generates an electric spark or high temperature, and an explosion occurs inside the explosion-proof box, the explosion products are ejected through the gap of the explosion-proof joint surface, which will not cause the explosive mixture outside the explosion-proof box to explode, thus achieving the explosion-proof requirements; on the other hand, by adding an explosion-proof box, the operating environment and maintenance environment of the solenoid valve can be greatly improved, the failure rate of the solenoid valve can be reduced, the service life of the solenoid valve can be extended, and maintenance can be facilitated), and a valve island fixed at the bottom of the inner cavity of the explosion-proof box, with an inner circle and outer square cross-section, and both ends connected to the air inlet connector (on the one hand, the valve island is one of the components of the jetting air duct in this utility model, that is, the jetting airflow enters the solenoid valve through the sequentially connected air inlet connector and valve island). On the other hand, the valve island provides an installation base for the solenoid valve assembly, greatly facilitating the installation and maintenance of the solenoid valves. Several sets of solenoid valves (used to control the size and velocity of the exhaust airflow in the corresponding jet duct) are arranged side by side on the upper surface of the valve island, with their inlets connected to the inner cavity of the valve island. The inlet ends of the solenoid valves are connected to the outlet ends of each set of solenoid valves through an equal number of connecting air pipes and exhaust connectors. The integrated nozzles (used to spray airflow onto the sorted materials) are also connected to the outlet ends of each set of solenoid valves through the connecting air pipes and exhaust connectors. Cable inlet connectors for cable installation are installed on the side wall of the explosion-proof box. The air inlet connector, valve island, solenoid valve, exhaust connector, connecting air pipe, and integrated nozzle are connected in sequence to form the jet duct. Airtight treatment is performed at each joint (on the one hand, when the solenoid valve coil generates an electric spark or high temperature and causes an explosion inside the explosion-proof box, it can effectively prevent the explosion products from being ejected from the explosion-proof box and causing an explosion of the explosive mixture outside the explosion-proof box; on the other hand, it can effectively reduce the probability of an explosion caused by gas overflowing from the jet duct and contacting the circuit).

[0007] In this invention, the inlet end of the exhaust connector is connected to the outlet end of the solenoid valve. The outlet end of the exhaust connector passes through the side wall of the explosion-proof box and connects to the inlet end of the connecting duct. (When the solenoid valves are assembled onto the upper surface of the valve island, the inlet end of each solenoid valve should be connected to the inner cavity of the valve island, and the outlet end of each solenoid valve should be connected to the inlet end of the exhaust connector. After the valve island and the assembled solenoid valves are fixed to the inner cavity of the explosion-proof box, the two ends of the connecting duct can be connected to the outlet end of the exhaust connector and the inlet end of the integrated nozzle respectively to quickly and conveniently achieve the separate assembly of the integrated nozzle and the explosion-proof box. The installation is simple and efficient.) The outlet end of the connecting duct is connected to the inlet end of the integrated nozzle.

[0008] The explosion-proof box described in this utility model is a square box structure with an open top (which facilitates the overall fixing of the valve island and the assembled solenoid valve into the inner cavity of the explosion-proof box), and a strip flange plate is horizontally fixed along the edge of the open top (easy to process and convenient to assemble), and bolt mounting holes are opened on the strip flange plate (so that bolts can be inserted to achieve quick connection when assembling).

[0009] The design principle of this utility model is as follows:

[0010] This invention primarily improves the solenoid valve by integrating it into the air duct and by modifying the blow-off duct. More specifically, this invention designs a valve island for housing the solenoid valve and connecting it to the air inlet connector, greatly facilitating the installation and maintenance of the solenoid valve. The improved blow-off duct is formed by sequentially connecting the air inlet connector, valve island, solenoid valve, exhaust connector, connecting duct, and integrated nozzle. Not only are all joints airtight, but an explosion-proof enclosure is added to the front half of the blow-off duct—the solenoid valve is integrated onto the upper surface of the valve island and then fixed to the bottom of the explosion-proof enclosure's inner cavity. This allows the integrated nozzle to be installed separately from the explosion-proof enclosure via the connecting duct, effectively isolating the electrical components of the solenoid valve from the external environment of the explosion-proof enclosure. When the solenoid valve coil generates an electric spark or high temperature, causing an explosion inside the explosion-proof enclosure, the explosion products are ejected through the gap in the explosion-proof joint surface, preventing the explosion of the explosive mixture outside the enclosure, thus achieving the explosion-proof requirements. Furthermore, installing an explosion-proof enclosure can greatly improve the operating and maintenance environment of the solenoid valve, reduce its failure rate, extend its service life, and facilitate maintenance. Gas-tightening treatment at every connection point can also effectively reduce the chance of an explosion caused by gas overflowing from the blower duct and coming into contact with the circuit.

[0011] The beneficial technologies of this utility model are as follows:

[0012] This invention enables the separate installation of the integrated nozzle and the explosion-proof enclosure, effectively isolating the electrical components of the solenoid valve from the external environment of the enclosure. This prevents the explosion of the external explosive mixture in the event of an explosion inside the enclosure, thus achieving explosion protection. Simultaneously, this invention significantly improves the operating and maintenance environment of the solenoid valve, reducing its failure rate and extending its service life. Furthermore, this invention allows for the assembly of the solenoid valve, enabling quick assembly or disassembly of the integrated nozzle and the explosion-proof enclosure, offering advantages such as easy installation, disassembly, and maintenance. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 yes Figure 1 The left view.

[0015] Figure 3 yes Figure 1 Top view.

[0016] Figure 4 This is a structural diagram of an explosion-proof enclosure.

[0017] Figure 5 yes Figure 4 The left view.

[0018] Figure 6 yes Figure 4 Top view.

[0019] Part number descriptions in the diagram: 1. Explosion-proof box, 1-1. Shaped flange plate, 1-1-1. Bolt mounting hole, 2. Valve island, 3. Solenoid valve, 4. Air inlet connector, 5. Cable inlet connector, 6. Exhaust connector, 7. Connecting duct, 8. Integrated nozzle. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] like Figures 1-6As shown, this utility model discloses a split-type explosion-proof spraying device, which includes explosion-proof boxes 1 installed on both sides of the sorting machine frame. On one hand, the solenoid valve 3 is assembled onto the upper surface of the valve island 2 and then fixed as a whole to the bottom of the inner cavity of the explosion-proof box 1. In this way, the integrated nozzle 8 is connected to the air duct 7, achieving separate installation from the explosion-proof box 1. This effectively isolates the electrical components of the solenoid valve 3 from the external environment of the explosion-proof box 1. When the coil of the solenoid valve 3 generates an electric spark or high temperature, and an explosion occurs inside the explosion-proof box, the explosion products are ejected through the gap in the explosion-proof joint surface, without... This will cause the explosive mixture outside the explosion-proof enclosure to explode, thereby achieving the explosion-proof requirement. On the other hand, by adding the explosion-proof enclosure 1, the operating and maintenance environment of the solenoid valve 3 can be greatly improved, the failure rate of the solenoid valve 3 can be reduced, the service life of the solenoid valve 3 can be extended, and maintenance can be facilitated. The valve island 2, which is fixed at the bottom of the inner cavity of the explosion-proof enclosure, has an inner circle and an outer square cross-section, and is connected to the air inlet connector 4 at both ends (on the one hand, the valve island 2 is one of the components of the jet air duct in this utility model, that is, the jet airflow enters the solenoid valve through the air inlet connector 4 and the valve island 2 connected in sequence). On the other hand, the valve island 2 provides an installation base for the solenoid valves 3, greatly facilitating the installation and maintenance of the solenoid valves 3. Several sets of solenoid valves 3 (used to control the size and velocity of the exhaust airflow in the corresponding blowing duct) are arranged side by side on the upper surface of the valve island and their inlets are all connected to the inner cavity of the valve island. The inlet ends of the integrated nozzles 8 (used to spray airflow onto the sorted material) are connected to the outlet ends of each set of solenoid valves through an equal number of connecting air pipes 7 and exhaust connectors 6. The nozzles 8 are installed on the side wall of the explosion-proof box. The cable inlet connector 5 is used for cable installation; the air inlet connector 4, valve island 2, solenoid valve 3, exhaust connector 6, connecting air duct 7, and integrated nozzle 8 are connected in sequence to form a spray air duct. At each joint, airtight treatment is performed (on the one hand, when the coil of solenoid valve 3 generates an electric spark or high temperature and causes an explosion inside the explosion-proof box, it can effectively prevent the explosion products from being ejected from the explosion-proof box and causing an explosion of the explosive mixture outside the explosion-proof box; on the other hand, it can effectively reduce the probability of an explosion caused by gas overflowing from the spray air duct and contacting the circuit).

[0022] In this invention, the inlet end of the exhaust connector 6 is connected to the outlet end of the solenoid valve 3. The outlet end of the exhaust connector 6 passes through the side wall of the explosion-proof box 1 and is connected to the inlet end of the connecting duct 7. (When the solenoid valve 3 is assembled onto the upper surface of the valve island 2, the inlet end of each solenoid valve 3 should be connected to the inner cavity of the valve island 3, and the outlet end of each solenoid valve 3 should be connected to the inlet end of the exhaust connector 6. After the valve island 2 and the assembled solenoid valve 3 are fixed to the inner cavity of the explosion-proof box 1, the two ends of the connecting duct 7 can be connected to the outlet end of the exhaust connector 6 and the inlet end of the integrated nozzle 8 respectively to quickly and conveniently achieve the separate assembly of the integrated nozzle 8 and the explosion-proof box 1. The installation is simple and efficient.) The outlet end of the connecting duct 7 is connected to the inlet end of the integrated nozzle 8.

[0023] The explosion-proof box 1 described in this utility model is a square box structure with an open top (which facilitates the overall fixing of the valve island 2 and the assembled solenoid valve 3 into the inner cavity of the explosion-proof box 1), and a strip flange plate 1-1 is horizontally fixed along the edge of the open top (easy to process and convenient to assemble), and bolt mounting holes 1-1-1 are opened on the strip flange plate (which can achieve quick connection after inserting bolts during assembly).

[0024] The specific usage of this utility model is as follows:

[0025] Initial installation: First, assemble the solenoid valves 3 side by side onto the upper surface of the valve island 2, ensuring that the inlet end of each solenoid valve 3 is connected to the inner cavity of the valve island 3 and the outlet end of each solenoid valve 3 is connected to the inlet end of the exhaust connector 6, and perform airtight treatment. Then, fix the valve island 2 and the assembled solenoid valves 3 as a whole to the bottom of the inner cavity of the explosion-proof box 1. Next, insert the two air inlet connectors 4 through the side wall of the explosion-proof box 1 into the two ends of the inner cavity of the valve island 2, and perform airtight treatment. Then, place the entire explosion-proof box 1 upright, with the open end facing the installation position on the side of the sorting machine frame, and quickly connect the bolts after the position is aligned. Finally, simply connect the two ends of the connecting air duct 7 to the outlet end of the exhaust connector 6 and the inlet end of the integrated nozzle 8 to quickly and easily achieve the separate assembly of the integrated nozzle 8 and the explosion-proof box 1. Once the initial installation is complete, it can be used normally. That is, based on the original parameters such as the type, characteristics and particle size of the material to be sorted, the system calculates the corresponding parameters such as the flow rate and velocity of the airflow to be sprayed, and opens the corresponding number of solenoid valves 3 and the corresponding air ducts of the solenoid valves 3 to spray and sort the material.

[0026] When inspection or maintenance is required: simply disconnect the connection between the inlet end of the connecting duct 7 and the outlet end of the exhaust connector 6, and then remove the bolts in the bolt mounting holes 1-1-1 on the strip flange plate 1-1 in the explosion-proof box 1. This allows for quick and easy removal of the explosion-proof box 1 and separation from the integrated nozzle 8 for inspection or maintenance.

[0027] Reinstallation: Reinstallation is very simple after inspection or maintenance. Simply align the holes, screw the bolts into the bolt mounting holes 1-1-1, and then reconnect and seal the inlet end of the air duct 7 with the outlet end of the exhaust connector 6. This allows the device to be used again for spray-and-sort materials.

Claims

1. A split-type explosion-proof jet-blowing device, characterized in that: The blowing device includes an explosion-proof box (1) installed on both sides of the sorting machine frame, a valve island (2) fixed at the bottom of the explosion-proof box cavity with an inner circle and outer square cross-section and both ends connected to the air inlet connector (4), several sets of solenoid valves (3) arranged side by side on the upper surface of the valve island and whose inlet ends are all connected to the inner cavity of the valve island, an integrated nozzle (8) whose inlet end is connected to the outlet end of each set of solenoid valves through an equal number of connecting air pipes (7) and exhaust connectors (6), and a cable inlet connector (5) installed on the side wall of the explosion-proof box for cable installation; the air inlet connector (4), valve island (2), solenoid valve (3), exhaust connector (6), connecting air pipe (7), and integrated nozzle (8) are connected in sequence to form a blowing air duct, and airtight treatment is performed at each joint.

2. The split-type explosion-proof jet-blowing device according to claim 1, characterized in that: The inlet end of the exhaust connector (6) is connected to the outlet end of the solenoid valve (3). The outlet end of the exhaust connector (6) passes through the side wall of the explosion-proof box (1) and is connected to the inlet end of the connecting air duct (7). The outlet end of the connecting air duct (7) is connected to the inlet end of the integrated nozzle (8).

3. The split-type explosion-proof jet-blowing device according to claim 1, characterized in that: The explosion-proof box (1) is a square box structure with an open top, and a strip flange plate (1-1) is horizontally fixed along the edge of the open top. Bolt mounting holes (1-1-1) are provided on the strip flange plate.

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