Rotary kiln detection explosion-proof device

Abstract

The application discloses a rotary kiln detection explosion-proof device, and belongs to the technical field of rotary kiln, which comprises a buffer ring and a gravity sealing mechanism, a buffer cavity is formed in the buffer ring and is communicated with the inner cavity of a kiln body, the buffer cavity is communicated with the inner cavity of the kiln body through a through hole, the gravity sealing mechanism comprises a flow guide counterweight and a gravity sealing plug, the gravity sealing plug and the flow guide counterweight are connected with each other through a cable, and the gravity sealing plug and the flow guide counterweight are located on the side of the through hole close to the inner cavity of the kiln body and the side of the buffer cavity respectively, in the rotary process of the kiln body, the flow guide counterweight drives the gravity sealing plug to alternately close the through hole under the action of gravity, the buffer cavity is connected with the outside through a pressure relief valve, and the buffer cavity is provided with an air pressure detection sensor for detecting the air pressure in the buffer cavity, and through the gravity sealing mechanism and the through hole, the kiln body inner cavity is protected and monitored against overpressure by cooperating with the pressure relief valve and the air pressure detection sensor, the safety of the rotary kiln is improved, and the risk of overpressure explosion is reduced.

Description

Technical Field

[0001] This invention relates to the field of rotary kiln technology, and in particular to a rotary kiln detection explosion-proof device. Background Technology

[0002] Rotary kilns often pose a risk of explosion during material calcination due to conditions conducive to flash explosions or overpressure. Several similar safety accidents have occurred in recent years. Therefore, it is necessary to install appropriate detection and explosion-proof measures on rotary kilns to prevent such accidents from happening.

[0003] Existing rotary kilns can be divided into internally heated rotary kilns and externally heated rotary kilns according to the heating method of the material inside the kiln. Externally heated rotary kilns can be heated by fuel oil, gas, coal, or electricity. Although electric heating can avoid explosions to a certain extent, there is still a risk of explosion. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the present invention provides a rotary kiln detection explosion-proof device.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a rotary kiln detection explosion-proof device, including a buffer ring sleeved on the front section of the kiln body, a buffer cavity formed inside the buffer ring that communicates with the inner cavity of the kiln body, the buffer cavity communicating with the inner cavity of the kiln body through a through hole, and a gravity sealing mechanism provided on the through hole;

[0006] The gravity sealing mechanism includes a flow guide counterweight and a gravity sealing plug for sealing the through hole. The gravity sealing plug and the flow guide counterweight are connected to each other by a cable. The gravity sealing plug and the flow guide counterweight are located on one side of the kiln body cavity and the other side of the buffer cavity, respectively. Both ends of the through hole have conical support surfaces facing outwards from the through hole. The outer sides of the gravity sealing plug and the flow guide counterweight are provided with outer conical surfaces that cooperate with the support surfaces. During the rotation of the kiln body, the flow guide counterweight drives the gravity sealing plug to alternately seal the through hole under the action of gravity.

[0007] The buffer chamber is connected to the outside via a pressure relief valve, and a pressure detection sensor is installed in the buffer chamber to detect the internal air pressure.

[0008] Preferably, the gravity sealing plug has a hollow structure.

[0009] Preferably, the outer conical surface of the flow guide counterweight is provided with multiple sets of flow guide grooves along the length direction for guiding the kiln body cavity and the buffer cavity.

[0010] Preferably, the guide grooves are circumferentially spaced on the outer conical surface of the guide counterweight, and the width of the guide grooves gradually increases from the lower end to the upper end of the guide counterweight.

[0011] Preferably, the flow-guiding counterweight has a through-hole in the length direction for guiding the kiln body cavity and the buffer cavity. A counterweight is connected in the through-hole by a crossbar. An annular flow channel is formed between the outer surface of the counterweight and the through-hole. The counterweight is connected to a gravity sealing plug by a cable.

[0012] Preferably, the lower end of the counterweight is formed with a flow-diverting cone, and the lower end of the flow-diverting cone is connected to the gravity sealing plug by a cable.

[0013] Preferably, the pressure relief valve is an electrically controlled pressure relief valve, and multiple sets of pressure relief valves are arranged circumferentially around the buffer ring. Each pressure relief valve is equipped with a tilt angle detection sensor that works in conjunction with it. The opening and closing of the pressure relief valve is controlled by working with the air pressure detection sensor and the tilt angle detection sensor.

[0014] Preferably, the buffer ring is provided with a buffer compartment, and the buffer compartment is provided with a pressure relief window that connects to the buffer cavity. The pressure relief window is provided with pressure relief fragments for forming an isolation between the buffer compartment and the buffer cavity. When the air pressure in the buffer cavity is over-pressurized, the pressure relief fragments are crushed and connected to the buffer compartment. When the pressure relief fragments are intact, a pressure difference is formed between the buffer compartment and the buffer cavity.

[0015] Preferably, the buffer compartments are arranged in multiple sets around the buffer ring, and the pressure resistance of the pressure-relieving fragments in the buffer compartments is different.

[0016] Preferably, the buffer compartment is filled with inert gas, and the pressure difference between different buffer compartments and the buffer cavity is different. The higher the pressure resistance of the pressure relief fragment, the higher the gas pressure in the corresponding buffer compartment.

[0017] The beneficial effects of this invention are: when the pressure inside the kiln exceeds the pressure relief valve's set pressure threshold, emergency pressure relief can be achieved through the valve, preventing overpressure and potential explosion within the kiln cavity. Simultaneously, by cooperating with a pressure detection sensor, the pressure inside the kiln cavity can be monitored, controlling the heating temperature. Since the pressure detection sensor is located in a buffer chamber, the material is effectively isolated within the kiln cavity, preventing it from affecting the sensor's detection accuracy and damaging it, thus extending the sensor's lifespan. Compared to existing technologies, the gravity sealing mechanism and through-hole, combined with the pressure relief valve and pressure detection sensor, provide overpressure protection and monitoring within the kiln cavity, improving the rotary kiln's safety and reducing the risk of overpressure explosion. Attached Figure Description

[0018] Figure 1 This is a perspective view of an embodiment of the present invention;

[0019] Figure 2 This is a partial cross-sectional schematic diagram of an embodiment of the present invention;

[0020] Figure 3for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a perspective view of the gravity sealing mechanism in an embodiment of the present invention;

[0022] Figure 5 This is a perspective view of the flow-guiding counterweight in an embodiment of the present invention;

[0023] Figure 6 This is a top view of the flow-guiding counterweight in an embodiment of the present invention;

[0024] Figure 7 This is a bottom view of the flow-guiding counterweight in an embodiment of the present invention;

[0025] Figure 8 This is a cross-sectional schematic diagram of the flow-guiding counterweight in an embodiment of the present invention.

[0026] In the diagram, 10 is the kiln body; 11 is the guide hole; 12 is the support surface; 20 is the buffer ring; 21 is the buffer chamber; 31 is the flow guide counterweight; 32 is the flow guide groove; 33 is the crossbar; 34 is the counterweight; 35 is the flow divider cone; 36 is the annular flow channel; 37 is the gravity sealing plug; 38 is the cable; 39 is the outer cone surface; 50 is the pressure relief valve; 60 is the buffer compartment; and 61 is the pressure relief fragment. Detailed Implementation

[0027] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] As attached Figure 1 As shown in Figure 8, the present invention provides a rotary kiln detection explosion-proof device, including a buffer ring 20 sleeved on the front section of the kiln body 10, a buffer cavity 21 formed inside the buffer ring 20 and communicating with the inner cavity of the kiln body 10, the buffer cavity 21 communicating with the inner cavity of the kiln body 10 through a through hole 11 on the kiln body 10, and a gravity sealing mechanism provided on the through hole 11.

[0029] The gravity sealing mechanism includes a flow-guiding counterweight 31 and a gravity sealing plug 37 for sealing the through hole 11. The gravity sealing plug 37 and the flow-guiding counterweight 31 are connected to each other by a cable 38. The gravity sealing plug 37 and the flow-guiding counterweight 31 are located on one side of the inner cavity of the kiln body 10 and the other side of the buffer cavity 21, respectively. The length of the cable 38 is less than the length of the through hole 11. Both ends of the through hole 11 have conical support surfaces 12 facing outwards. The outer sides of the gravity sealing plug 37 and the flow-guiding counterweight 31 are provided with outer conical surfaces 39 that cooperate with the support surfaces 12. During the rotation of the kiln body 10, when the horizontal height of one end of the through hole 11 near the inner cavity of the kiln body 10 is higher than the horizontal height of the other end, the flow-guiding counterweight 31 pulls the gravity sealing plug 37 to move in the direction of the through hole 11, guided by the support surfaces 12 of the through hole 11. The guide weight 31 is sealed at one end of the guide hole 11 near the inner cavity of the kiln body 10. When the horizontal height of the guide hole 11 near the inner cavity of the kiln body 10 is lower than that at the other end, under the guidance of the conical support surface 12 and the pull of the gravity sealing plug 37, the guide weight 31 abuts against the guide hole 11. The inner cavity of the kiln body 10 and the buffer cavity 21 are connected through the guide hole 11. That is, under the action of gravity, the guide weight 31 drives the gravity sealing plug 37 to alternately seal the guide hole 11. When the gravity sealing plug 37 rotates to the top of the kiln body 10, the gravity sealing plug 37 is used to separate the guide hole 11. When the gravity sealing plug 37 rotates to the bottom of the kiln body 10, the gravity sealing plug 37 seals the corresponding guide hole 11. That is, the guide hole 11 located below the kiln body 10 is always in a closed state. During the rotation of the kiln body 10, the material can pass through this section of the kiln body 10 normally.

[0030] The buffer chamber 21 is connected to the outside via a pressure relief valve 50, and a pressure detection sensor is installed in the buffer chamber 21 to detect the internal air pressure. Since the buffer chamber 21 is connected to the inner cavity of the kiln body 10, when the pressure inside the kiln body 10 exceeds the pressure relief valve 50's set pressure relief threshold, emergency pressure relief can be performed through the pressure relief valve 50 to prevent overpressure and explosion in the inner cavity of the kiln body 10. At the same time, in conjunction with the pressure detection sensor, the pressure inside the kiln body 10 can be monitored to control the heating temperature. Since the pressure detection sensor is located in the buffer chamber 21, the material is effectively isolated in the inner cavity of the kiln body 10, which can prevent the material from affecting the detection accuracy of the pressure detection sensor and prevent the material from damaging the pressure detection sensor, thus improving the lifespan of the pressure detection sensor.

[0031] Compared with existing technologies, the gravity sealing mechanism and the through hole 11, together with the pressure relief valve 50 and the air pressure detection sensor, provide overpressure protection and overpressure monitoring for the inner cavity of the kiln body 10, thereby improving the safety of the rotary kiln and reducing the risk of overpressure explosion.

[0032] Furthermore, the weight of the flow guide counterweight 31 is greater than the weight of the gravity sealing plug 37. In order to reduce the gravity of the gravity sealing plug 37 and enable the flow guide counterweight 31 to quickly pull the gravity sealing plug 37 to close the through hole 11, the gravity sealing plug 37 adopts a hollow structure.

[0033] Furthermore, the outer conical surface 39 of the flow guide counterweight 31 is provided with multiple sets of flow guide grooves 32 along the length direction for connecting the inner cavity of the kiln body 10 and the buffer cavity 21. The flow guide grooves 32 are circumferentially spaced on the outer conical surface 39 of the flow guide counterweight 31, and the width of the flow guide grooves 32 gradually increases from the lower end to the upper end of the flow guide counterweight 31. When the flow guide counterweight 31 abuts against the support surface 12 of the through hole 11, it connects the inner cavity of the kiln body 10 and the buffer cavity 21 through the flow guide grooves 32.

[0034] For further details, please see the appendix. Figure 5 -8. In order to improve the flow rate between the inner cavity of the kiln body 10 and the buffer cavity 21 when the flow guide counterweight 31 abuts against the support surface 12 of the guide hole 11, a guide hole is provided in the flow guide counterweight 31 to pass through in the length direction for connecting the inner cavity of the kiln body 10 and the buffer cavity 21. A counterweight 34 for increasing the weight of the flow guide counterweight 31 is connected in the guide hole by a crossbar 33. An annular flow channel 36 is formed between the outer side of the counterweight 34 and the guide hole. The counterweight 34 is connected to the gravity sealing plug 37 by a cable 38.

[0035] Furthermore, in order to reduce the influence of the counterweight 34 on the gas flow of the through hole 11, a flow divider cone 35 is formed at the lower end of the counterweight 34, and the lower end of the flow divider cone 35 is connected to the gravity sealing plug 37 through a cable 38.

[0036] Furthermore, the pressure relief valve 50 is an electrically controlled pressure relief valve 50, and multiple sets of pressure relief valves 50 are equidistantly arranged around the buffer ring 20. Each pressure relief valve 50 is equipped with a corresponding tilt angle detection sensor. By cooperating with the air pressure detection sensor to detect the pressure in the buffer chamber 21 and the tilt angle detection sensor to detect the state of the electrically controlled pressure relief valve 50, the opening and closing of the pressure relief valve 50 is controlled. Specifically, when the pressure in the buffer chamber 21 exceeds the set threshold, the air pressure detection sensor is triggered, and in conjunction with the tilt angle detection sensor, the pressure relief valve 50 located above the kiln body 10 is opened.

[0037] Furthermore, the buffer ring 20 is provided with a buffer chamber 60, and the buffer chamber 60 is provided with a pressure relief window that connects to the buffer cavity 21. The pressure relief window is provided with pressure relief fragments 61 for forming an isolation between the buffer chamber 60 and the buffer cavity 21. When the pressure in the buffer cavity 21 is over-pressurized, the pressure relief fragments 61 are crushed and connected to the buffer chamber 60. When the pressure relief fragments 61 are intact, a pressure difference is formed between the buffer chamber 60 and the buffer cavity 21. After the pressure relief fragments 61 are crushed, the high pressure in the buffer cavity 21 is dispersed into the buffer chamber 60, which can reduce the pressure in the inner cavity of the kiln body 10 to a certain extent, buffer the instantaneous pressure increase in the inner cavity of the kiln body 10, avoid the instantaneous pressure increase in the inner cavity of the kiln body 10 leading to overpressure explosion, and give the operator sufficient time to take appropriate measures.

[0038] Furthermore, in order to further improve the buffering capacity of the instantaneous pressurization inside the kiln body 10, multiple sets of buffer chambers 60 are arranged around the buffer ring 20, and the pressure-resistant strength of the pressure-relieving fragments 61 in the buffer chambers 60 is different. The buffer chambers 60 are filled with inert gas, and the pressure difference between the different buffer chambers 60 and the buffer cavity 21 is different. The pressure in the multiple sets of buffer chambers 60 can be set in a stepped manner. The higher the pressure resistance of the pressure-relieving fragments 61, the higher the air pressure in the corresponding buffer chamber 60. During the instantaneous pressurization process inside the kiln body 10, the pressure-relieving fragments 61 of the buffer chambers 60 are broken one by one to gradually buffer the instantaneous pressurization.

[0039] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A rotary kiln explosion-proof detection device, characterized in that, Includes a buffer ring (20) fitted on the front section of the kiln body (10), and a buffer cavity (21) connected to the inner cavity of the kiln body (10) is formed inside the buffer ring (20). The buffer cavity (21) is connected to the inner cavity of the kiln body (10) through a through hole (11). A gravity sealing mechanism is provided on the through hole (11). The gravity sealing mechanism includes a flow-guiding counterweight (31) and a gravity sealing plug (37) for sealing the through hole (11). The gravity sealing plug (37) and the flow-guiding counterweight (31) are connected to each other by a cable (38). The gravity sealing plug (37) and the flow-guiding counterweight (31) are located on one side of the inner cavity of the kiln body (10) and the other side of the buffer cavity (21), respectively. Both ends of the through hole (11) have conical support surfaces (12) facing outwards from the through hole (11). The outer sides of the gravity sealing plug (37) and the flow-guiding counterweight (31) are provided with outer conical surfaces that cooperate with the support surfaces (12). (39) During the rotation of the kiln body (10), when the horizontal height of the end of the guide hole (11) near the inner cavity of the kiln body (10) is higher than the horizontal height of the end near the buffer cavity (21), the guide counterweight (31) pulls the gravity sealing plug (37) to move and seal the end of the guide hole (11) near the inner cavity of the kiln body (10); when the horizontal height of the end of the guide hole (11) near the inner cavity of the kiln body (10) is lower than the horizontal height of the end near the buffer cavity (21), the guide counterweight (31) abuts against the guide hole (11) to connect the inner cavity of the kiln body (10) with the buffer cavity (21); The buffer chamber (21) is connected to the outside via a pressure relief valve (50), and a pressure detection sensor for detecting the internal air pressure of the buffer chamber (21) is provided in the buffer chamber (21).

2. The rotary kiln explosion-proof detection device according to claim 1, characterized in that, The gravity sealing plug (37) has a hollow structure.

3. The rotary kiln explosion-proof detection device according to claim 1, characterized in that, The outer conical surface (39) of the flow guide counterweight (31) is provided with multiple sets of flow guide grooves (32) along the length direction for guiding the inner cavity of the kiln body (10) and the buffer cavity (21).

4. The rotary kiln explosion-proof detection device according to claim 3, characterized in that, The guide grooves (32) are circumferentially spaced on the outer conical surface (39) of the guide counterweight (31), and the width of the guide grooves (32) gradually increases from the lower end to the upper end of the guide counterweight (31).

5. The rotary kiln explosion-proof detection device according to claim 3, characterized in that, The flow guide counterweight (31) has a guide hole that runs through the length direction to guide the inner cavity of the kiln body (10) and the buffer cavity (21). A counterweight (34) is connected in the guide hole by a crossbar (33). An annular flow channel (36) is formed between the outer side of the counterweight (34) and the guide hole. The counterweight (34) is connected to the gravity sealing plug (37) by a cable (38).

6. The rotary kiln explosion-proof detection device according to claim 5, characterized in that, The lower end of the counterweight (34) is formed with a diversion cone (35), and the lower end of the diversion cone (35) is connected to the gravity sealing plug (37) by a cable (38).

7. The rotary kiln explosion-proof detection device according to claim 1, characterized in that, The pressure relief valve (50) is an electrically controlled pressure relief valve (50), and multiple sets of pressure relief valves (50) are arranged circumferentially around the buffer ring (20). Each pressure relief valve (50) is equipped with a tilt angle detection sensor that works in conjunction with it. The opening and closing of the pressure relief valve (50) is controlled by working in conjunction with the air pressure detection sensor and the tilt angle detection sensor.

8. The rotary kiln explosion-proof detection device according to claim 1, characterized in that, The buffer ring (20) is provided with a buffer chamber (60), and a pressure relief window is provided on the buffer chamber (60) to connect with the buffer cavity (21). The pressure relief window is provided with a pressure relief fragment (61) for forming an isolation between the buffer chamber (60) and the buffer cavity (21). When the air pressure in the buffer cavity (21) is over-pressured, the pressure relief fragment (61) is crushed and connected to the buffer chamber (60). When the pressure relief fragment (61) is intact, a pressure difference is formed between the buffer chamber (60) and the buffer cavity (21).

9. The rotary kiln explosion-proof detection device according to claim 8, characterized in that, The buffer chamber (60) is provided in multiple sets around the buffer ring (20), and the pressure relief fragments (61) of the buffer chamber (60) have different pressure resistance.

10. The rotary kiln explosion-proof detection device according to claim 9, characterized in that, The buffer chamber (60) is filled with inert gas, and the pressure difference between the different buffer chambers (60) and the buffer cavity (21) is different. The higher the pressure resistance of the pressure relief fragment (61), the lower the gas pressure in the corresponding buffer chamber (60).

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