Explosion suppression system for material conveying pipeline

Abstract

The utility model relates to an explosion suppression system for a material conveying pipeline, and belongs to the technical field of flammable and explosive material conveying pipelines. The flame-retardant conveying device comprises a conveying pipeline, a flame sensor, a flame-retardant execution mechanism and a control system, one end of the conveying pipeline is provided with a feeding port, the other end of the conveying pipeline is provided with a discharging port, and the flame sensor and the flame-retardant execution mechanism are arranged on the conveying pipeline at intervals in the length direction of the conveying pipeline. The flame sensor is located at the position closer to a feeding port of the conveying pipeline than the flame-retardant executing mechanism, the flame sensor and the flame-retardant executing mechanism are both electrically connected with the control system, a mounting base is fixedly arranged on the outer side wall of the conveying pipeline, and the mounting base is provided with a detection hole vertically communicated with the conveying pipeline. The flame sensor is fixedly installed on the outer end face of the installation base, a detection lens of the flame sensor is embedded into the detection hole, and a gas injection hole is formed in the position, in front of the detection lens, of the installation base, so that dust collection of the detection lens is removed.

Description

Technical Field

[0001] The utility model relates to an explosion suppression system for a material conveying pipeline, belonging to the technical field of flammable and explosive material conveying pipelines. Background Art

[0002] Hydroxyethyl cellulose (HEC) is a white or pale yellow, odorless, non-toxic, fibrous or powdered solid produced by the etherification reaction of alkaline cellulose and ethylene oxide (or chloroethanol). It is a non-ionic, soluble cellulose ether. Due to its excellent thickening, suspending, dispersing, emulsifying, bonding, film-forming, moisture-retaining, and protective colloid properties, HEC has been widely used in oil extraction, coatings, construction, pharmaceuticals, food, textiles, papermaking, and polymer polymerization.

[0003] Cotton pulp is an essential raw material in the production of hydroxyethyl cellulose. It is typically packaged and shipped in rolls. Upon purchase, the rolls must be crushed into powdered cellulose of varying mesh sizes. After crushing, the rolls are transported via fans and pipes to downstream equipment silos for storage. Because cotton pulp dust is combustible, safety measures must be taken during transportation.

[0004] According to search queries, when using pipelines to transport flammable and explosive materials, it is usually considered to design a pipeline explosion suppression system. For example, the Chinese utility model patent document with authorization announcement number CN202876161U discloses an automatic explosion suppression device for a combustible gas transportation pipeline, which is used to extinguish fires or suppress explosions in a combustible gas transportation pipeline. It is installed outside the combustible gas transportation pipeline. The automatic explosion suppression device for a combustible gas transportation pipeline consists of a high-pressure container, a controller, a flame sensor, and a fire extinguishing execution device. The high-pressure container is arranged outside the combustible gas transportation pipeline, the controller is arranged outside the combustible gas transportation pipeline, and the flame sensor is arranged inside the combustible gas transportation pipeline. The flame sensor is electrically connected to the controller. After multiple gas transportation simulation explosion tests and tests, the entire control system fully meets the technical conditions and requirements of the coal mine gas transportation pipeline explosion suppression device. There is no flame information outside the explosion suppression sprayer 6m away. It is suitable for suppressing the expansion of combustion and explosion of flammable and explosive gases and combustible dust, ensuring the safe transportation of gas.

[0005] The Chinese invention patent document with application publication number CN104315935A discloses an automatic explosion suppression device suitable for dust explosions in pipelines, including a flame sensor and a pressure sensor, a high-pressure explosive container, and a small detonating device. A carbonate powder explosion suppressant is placed in the small detonating device, and the high-pressure explosive container is filled with high-pressure N2 gas explosion suppressant. A bursting disc is provided between the high-pressure explosive container and the small detonating device to separate the high-pressure N2 gas in the high-pressure explosive container. A bursting disc diaphragm is provided between the small detonating device and the powder conveying pipeline to support the carbonate powder explosion suppressant. The flame sensor and the pressure sensor are connected to a controller, and the controller is connected to the small detonating device to control the firing of the small detonating device, so that the high-pressure N2 gas explosion suppressant and the carbonate powder explosion suppressant in the high-pressure explosive container enter the pipeline at high speed to achieve explosion suppression.

[0006] The overall design idea of the existing technology is basically to use flame sensors and other detection equipment and various flame retardant actuators for linkage control, but the flame sensors are generally installed directly inside the conveying pipe, and the conveyed materials generally contain dust, especially the cotton pulp dust conveyed by the present invention is itself a dusty raw material. During long-term use, the detection lens of the flame sensor will inevitably produce dust accumulation, affecting its detection accuracy, and thus affecting the safety performance of the entire explosion suppression system. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide an explosion suppression system for a material conveying pipeline with better safety performance.

[0008] In order to solve the above technical problems, the technical solution adopted by the utility model is: an explosion suppression system for a material conveying pipeline, including a conveying pipeline, a flame sensor, a flame retardant actuator and a control system, the conveying pipeline having a feed port at one end and a discharge port at the other end, the flame sensor and the flame retardant actuator are arranged on the conveying pipeline at intervals along the length direction of the conveying pipeline, the flame sensor is located closer to the feed port of the conveying pipeline than the flame retardant actuator, the flame sensor and the flame retardant actuator are both electrically connected to the control system, a mounting base is fixedly provided on the outer wall of the conveying pipeline, the mounting base has a detection hole vertically connected to the conveying pipeline, the flame sensor is fixedly installed on the outer end face of the mounting base, and the detection lens of the flame sensor is embedded in the detection hole, a gas blowing hole connected to the inner wall of the detection hole is provided on the mounting base, and the orifice formed by the gas blowing hole on the inner wall of the detection hole is located in front of the detection lens of the flame sensor, and a gas blowing pipe interface is provided at the end of the flame sensor away from the detection hole.

[0009] It is further preferred that the gas blowing holes are arranged symmetrically on both sides of the detection hole, the axis of the gas blowing holes is perpendicular to the axis of the detection hole, and the opening formed by the gas blowing holes on the inner wall of the detection hole is flush with the front end surface of the detection lens of the flame sensor on the side close to the detection lens of the flame sensor.

[0010] It is further preferred that two flame sensors are provided and are arranged symmetrically with respect to the axis of the conveying pipe on the outer side wall of the conveying pipe.

[0011] It is further preferred that the flame retardant actuator comprises a nitrogen injection spray solenoid valve and a blocking valve spaced apart along the length direction of the delivery pipeline, and the nitrogen injection spray solenoid valve is located closer to the flame sensor than the blocking valve.

[0012] It is further preferred that the blocking valve is installed at the midpoint of the entire length of the delivery pipeline, and the nitrogen injection spray solenoid valve is installed at the midpoint between the blocking valve installation position and the feed inlet of the delivery pipeline.

[0013] It is further preferred that: the delivery pipeline is provided with explosion vents on both sides of the nitrogen injection spray solenoid valve, and the explosion vents are equipped with explosion vent plates.

[0014] It is further preferred that: an audible and visual alarm is also included, and the audible and visual alarm is electrically connected to the control system.

[0015] The beneficial effect of the present utility model is that during implementation, nitrogen gas of a certain pressure can be intermittently introduced through the gas blowing hole at regular intervals to blow the detection lens of the flame sensor, thereby cleaning and collecting dust from the detection lens of the flame sensor, ensuring the cleanliness of the detection lens, and then effectively ensuring its detection accuracy, thereby improving the safety performance of the entire explosion suppression system. The flame in the conveying pipeline is monitored in real time by the flame sensor, and the flame information generated in the conveying pipeline is fed back to the control system. The control system quickly and accurately analyzes and judges and then starts the action of the blocking valve, thereby cutting off the material conveying channel, and simultaneously opens the nitrogen injection spray solenoid valve to inject nitrogen into the pipeline for fire extinguishing, effectively achieving the explosion suppression effect. In addition, the conveying pipeline is provided with explosion vents and explosion venting plates on both sides of the nitrogen injection spray solenoid valve, which are used as the release outlet of the explosion shock wave in extreme explosion situations. The control system can also simultaneously start the sound and light alarm for early warning and reminder, thereby ensuring the safety of related equipment and life and property. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0017] Figure 2 It is a schematic diagram of the flame sensor installation structure in the present utility model.

[0018] Parts marked in the figure: conveying pipeline 1, flame sensor 2, mounting base 3, detection hole 4, gas blowing hole 5, nitrogen injection spray solenoid valve 6, blocking valve 7, explosion vent 8. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 and Figure 2 As shown, the utility model includes a conveying pipeline 1, a flame sensor 2, a flame retardant actuator and a control system. The conveying pipeline 1 has a feed port at one end and a discharge port at the other end. The flame sensor 2 and the flame retardant actuator are arranged on the conveying pipeline 1 at intervals along the length direction of the conveying pipeline 1. The flame sensor 2 is located closer to the feed port of the conveying pipeline 1 than the flame retardant actuator. The flame sensor 2 and the flame retardant actuator are both electrically connected to the control system. A mounting base 3 is fixedly provided on the outer wall of the conveying pipeline 1. The mounting base 3 has a detection hole 4 vertically connected to the conveying pipeline 1 (that is, equivalent to the detection hole 4 and the inner hole of the conveying pipeline 1 vertically intersecting). The flame sensor 2 is fixedly mounted on the outer end surface of the mounting base 3, and the detection lens of the flame sensor 2 is embedded in the detection hole 4. A gas blowing hole 5 connected to the inner wall of the detection hole 4 is provided on the mounting base 3, and the orifice formed by the gas blowing hole 5 on the inner wall of the detection hole 4 is located in front of the detection lens of the flame sensor 2. A gas blowing pipeline interface is provided at the end of the gas blowing hole 5 away from the detection hole flame sensor 2. The fixing of the mounting base 3 is a conventional technique, such as welding fixation, etc. The detection lens of the flame sensor 2 is embedded in the detection hole 4, which is equivalent to the outer end shape of the detection hole 4 needing to match the outer shape of the end of the flame sensor 2 provided with the detection lens, and realizing a closed connection between the inner wall of the detection hole 4 and the flame sensor 2, and maintaining the normal conveying function of the conveying pipeline 1. The fixed installation of the flame sensor 2 is a conventional technique, such as generally being fixed to the mounting base 3 by bolts. The gas blowing pipeline interface is used for external gas blowing pipeline. It is understandable that the blowing gas introduced into the gas blowing pipeline cannot be a flammable and explosive gas, and nitrogen with a certain pressure can usually be selected. During specific implementation, the gas blowing hole 5 can be used to intermittently introduce nitrogen with a certain pressure to blow the detection lens of the flame sensor 2, so as to clean and collect dust from the detection lens of the flame sensor 2, ensure the cleanliness of the detection lens, and then effectively ensure its detection accuracy, and improve the safety performance of the entire explosion suppression system.

[0021] In order to provide a blowing cleaning effect, the preferred arrangement of the gas blowing holes 5 is that the gas blowing holes 5 are symmetrically arranged on both sides of the detection hole 4, the axis of the gas blowing holes 5 is perpendicular to the axis of the detection hole 4, and the opening formed by the gas blowing holes 5 on the inner wall of the detection hole 4 is close to the detection lens of the flame sensor 2 and is flush with the front end surface of the detection lens of the flame sensor 2.

[0022] In order to further improve the accuracy of flame signal detection, two flame sensors 2 are preferably provided, and are arranged symmetrically on the outer wall of the conveying pipe 1 relative to the axis of the conveying pipe 1. "Symmetrical arrangement" is equivalent to the specific installation structure of the two flame sensors 2 being the same, and both are provided with corresponding installation bases 3 and gas blowing holes 5.

[0023] Preferably, the flame retardant actuator includes a nitrogen injection spray solenoid valve 6 and a blocking valve 7 that are spaced apart along the length direction of the conveying pipeline 1. The nitrogen injection spray solenoid valve 6 is located closer to the flame sensor 2 than the blocking valve 7. During specific implementation, the flame in the conveying pipeline 1 is monitored in real time by the flame sensor 2, and the flame information generated in the conveying pipeline 1 is fed back to the control system. The control system quickly and accurately analyzes and judges and then starts the action of the blocking valve 7, thereby cutting off the material conveying channel, and synchronously opens the nitrogen injection spray solenoid valve 6 to inject nitrogen into the pipeline for fire extinguishing, effectively achieving the explosion suppression effect. It is understandable that, according to the actual layout of the on-site equipment, the flame sensor 2 can also be linked with other equipment for control, and the operation of the upstream equipment of the conveying pipeline 1 can be stopped at the same time. For example, the utility model is used to convey cotton pulp dust, and can be simultaneously associated with the front-end crusher and the separation system.

[0024] In order to improve the explosion suppression effect, the preferred installation positions of the blocking valve 7 and the nitrogen injection spray solenoid valve 6 are as follows: the installation position of the blocking valve 7 is the midpoint of the entire length of the conveying pipeline 1, and the installation position of the nitrogen injection spray solenoid valve 6 is the midpoint between the installation position of the blocking valve 7 and the feed inlet of the conveying pipeline 1 (that is, equivalent to being installed at 1 / 4 of the entire length of the conveying pipeline 1, starting from the feed inlet of the conveying pipeline 1).

[0025] In order to further improve the explosion suppression effect, the delivery pipeline 1 is provided with explosion vents 8 on both sides of the nitrogen injection spray solenoid valve 6, and the explosion vents 8 are equipped with explosion venting plates.

[0026] To further enhance safety, the present invention also includes an audible and visual alarm, which is electrically connected to the control system. The audible and visual alarm can be installed in appropriate locations based on practical needs. For example, the present invention includes audible and visual alarms at both the equipment site and the main control room. When the flame sensor 2 detects a flame, it not only controls the flame retardant actuator but also simultaneously activates the audible and visual alarms at both the equipment site and the main control room to provide a warning.

Claims

1. An explosion suppression system for a material conveying pipeline, comprising a conveying pipeline (1), a flame sensor (2), a flame retardant actuator and a control system, wherein the conveying pipeline (1) has a feed port at one end and a discharge port at the other end, the flame sensor (2) and the flame retardant actuator are arranged on the conveying pipeline (1) at intervals along the length direction of the conveying pipeline (1), the flame sensor (2) is located closer to the feed port of the conveying pipeline (1) than the flame retardant actuator, and the flame sensor (2) and the flame retardant actuator are both electrically connected to the control system, characterized in that: A mounting base (3) is fixedly provided on the outer wall of the delivery pipe (1), the mounting base (3) having a detection hole (4) vertically connected to the delivery pipe (1), a flame sensor (2) is fixedly installed on the outer end surface of the mounting base (3), and a detection lens of the flame sensor (2) is embedded in the detection hole (4), a gas blowing hole (5) connected to the inner wall of the detection hole (4) is provided on the mounting base (3), and an orifice formed by the gas blowing hole (5) on the inner wall of the detection hole (4) is located in front of the detection lens of the flame sensor (2), and a gas blowing pipe interface is provided at one end of the gas blowing hole (5) away from the detection hole flame sensor (2).

2. The explosion suppression system for a material conveying pipeline according to claim 1, characterized in that: The gas blowing holes (5) are symmetrically arranged on both sides of the detection hole (4), the axes of the gas blowing holes (5) are perpendicular to the axis of the detection hole (4), and the side of the opening formed by the gas blowing holes (5) on the inner wall of the detection hole (4) close to the detection lens of the flame sensor (2) is flush with the front end surface of the detection lens of the flame sensor (2).

3. The explosion suppression system for a material conveying pipeline according to claim 1, characterized in that: Two flame sensors (2) are provided and are arranged symmetrically relative to the axis of the delivery pipeline (1) on the outer side wall of the delivery pipeline (1).

4. The explosion suppression system for a material conveying pipeline according to claim 1, characterized in that: The flame retardant actuator comprises a nitrogen injection spraying solenoid valve (6) and a blocking valve (7) arranged at intervals along the length direction of the delivery pipeline (1); the nitrogen injection spraying solenoid valve (6) is located closer to the flame sensor (2) than the blocking valve (7).

5. The explosion suppression system for a material conveying pipeline according to claim 4, characterized in that: The installation position of the blocking valve (7) is the midpoint of the entire length of the delivery pipeline (1), and the installation position of the nitrogen injection spraying solenoid valve (6) is the midpoint between the installation position of the blocking valve (7) and the feed inlet of the delivery pipeline (1).

6. The explosion suppression system for a material conveying pipeline according to claim 4, characterized in that: The delivery pipeline (1) is provided with explosion relief ports (8) on both sides of the nitrogen injection spraying electromagnetic valve (6), and the explosion relief ports (8) are equipped with explosion relief plates.

7. The explosion suppression system for a material conveying pipeline according to any one of claims 1 to 6, characterized in that: It also includes an audible and visual alarm, which is electrically connected to the control system.

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