On-line sampling method and device for bulk materials, and on-line detection system

Abstract

The present invention relates to the technical field of iron and steel metallurgical equipment, and particularly to an on-line sampling method and device for bulk materials and an on-line detection system. The on-line sampling device for bulk materials includes: a base provided with a detection port for connecting a detection device thereon; a fixing frame installed on the base and located beside the detection port; a telescopic rod, the extending end of which is equipped with a sampling hopper capable of switching between a material taking state and a material discharging state; the telescopic rod is installed on the fixing frame and is used to drive the sampling hopper to move between the blanking area and the detection port through telescopic movement. The device of the present invention can take materials on-line in the blanking area, convey the taken materials to the detection device for on-line detection, and has a small single sampling amount, few material turnover times, and a fast and efficient material transmission process, so as to improve the efficiency and safety of material detection.

Description

Technical Field

[0001] The present invention relates to the technical field of iron and steel metallurgical equipment, and in particular to an on-line sampling method and device for bulk materials and an on-line detection system. Background Art

[0002] In the sintering and pelletizing fields of the iron and steel metallurgical industry, multi-component materials are involved in raw material processing. In the raw material processing stage, different materials need to be evenly mixed. The more evenly the materials are mixed, the easier it is to control the subsequent granulation and roasting stages, and thus the better the quality of the final sintered pellet product. In the process of material mixing, accurate data on the mixing uniformity of materials can be effectively used for feedback adjustment of the operating parameters of the mixing equipment, so as to improve the operating effect of the mixing equipment, reduce equipment energy consumption and material consumption, and enhance the mixing uniformity of materials.

[0003] Therefore, it is necessary to provide an on-line material mixing uniformity detection device on the production line. The on-line material mixing uniformity detection process requires real-time sampling of samples on the production line for analysis. The on-line detection needs to meet the requirements of less sampling amount, fast sampling speed, and high sampling frequency. Moreover, the sampling device and the detection device need to be reasonably connected and matched.

[0004] However, most of the existing on-line detections adopt manual material sampling, which is time-consuming and laborious. The existing sampling devices have problems such as too large a single sampling amount, many material conversion times, and easy blockage of the detection device. Moreover, the existing sampling devices cannot be well connected and matched with the detection devices, resulting in problems such as low on-line detection efficiency and poor detection safety. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides an on-line sampling device for bulk materials to solve the problems of too large a single sampling amount, many material conversion times, and easy blockage of the detection device in the existing sampling devices.

[0006] The present invention also provides an on-line detection system.

[0007] The present invention also provides an on-line sampling method for bulk materials.

[0008] An on-line sampling device for bulk materials according to an embodiment of the first aspect of the present invention includes:

[0009] A base, which is provided with a detection port for connecting a detection device;

[0010] A fixing frame, which is installed on the base and is located beside the detection port;

[0011] A telescopic rod, with a material taking hopper capable of switching between a material taking state and a material discharging state installed at its extending end; the telescopic rod is installed on the fixed frame and is used to drive the material taking hopper to move between the blanking area and the detection port through telescopic movement.

[0012] According to an embodiment of the present invention, the material taking hopper includes a fixed hopper and an opening and closing hopper that are interconnected. The fixed hopper is detachably installed at the extending end of the telescopic rod, and a material receiving opening is provided at the top of the fixed hopper; the opening and closing hopper is pivotally connected to the fixed hopper, and an openable and closable material discharging port is formed between the bottom of the opening and closing hopper and the bottom of the fixed hopper. The material discharging port is used to open in the material discharging state and close in the material taking state.

[0013] According to an embodiment of the present invention, the bottom of the opening and closing hopper is connected to the telescopic rod through an elastic member, and the elastic member is used to close the material discharging port by biasing.

[0014] According to an embodiment of the present invention, a touch rod is provided at the bottom of the opening and closing hopper, and a top rod corresponding to the detection port is provided on the fixed frame. The top rod and the touch rod are arranged opposite to each other, and the top rod is used to push the touch rod to drive the material discharging port located above the detection port to open.

[0015] According to an embodiment of the present invention, a driving mechanism and a guiding mechanism are installed on the fixed frame. The driving mechanism is connected to the telescopic rod, and a guiding channel for the telescopic rod to perform telescopic movement is provided on the guiding mechanism.

[0016] According to an embodiment of the present invention, the driving mechanism includes a driving motor and a driving wheel respectively installed on the fixed frame. A plurality of pin rollers are arranged at intervals along the length direction of the telescopic rod. A plurality of teeth are provided on the outer edge of the driving wheel, and the driving wheel drives each tooth to mesh with each pin roller through rotation; the driving wheel is connected to the driving motor.

[0017] According to an embodiment of the present invention, the guiding mechanism includes at least two groups of retaining wheel sets. Each group of retaining wheel sets is installed on the fixed frame along the length direction of the telescopic rod; each group of retaining wheel sets includes a first retaining wheel and a second retaining wheel. The first retaining wheel and the second retaining wheel of each group respectively roll and cooperate with the upper end and the lower end of the telescopic rod, and the guiding channel is constructed between the first retaining wheel and the second retaining wheel of each group.

[0018] According to an embodiment of the present invention, a pressure sensor is provided on the first retaining wheel.

[0019] An online detection system according to an embodiment of the second aspect of the present invention includes a first conveying device, a second conveying device, a detection device, and the bulk material online sampling device as described above. A blanking area is configured between the first conveying device and the second conveying device; the detection port of the bulk material online sampling device is connected to the detection device, and the material receiving hopper of the bulk material online sampling device can move between the blanking area and the detection port.

[0020] A method for online sampling of bulk materials according to an embodiment of the third aspect of the present invention is executed by the bulk material online sampling device as described above, or by the online detection system as described above;

[0021] The method for online sampling of bulk materials includes:

[0022] Drive the telescopic rod to extend relative to the fixed frame until the material receiving hopper is located in the blanking area, and keep the material receiving hopper in the material receiving state;

[0023] Drive the telescopic rod to retract relative to the fixed frame until the material receiving hopper is located above the detection port, and keep the material receiving hopper in the material discharging state.

[0024] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0025] A bulk material online sampling device according to an embodiment of the present invention is used to take materials from the blanking area and send them to the detection device. The bulk material online sampling device includes: a base provided with a detection port for connecting to the detection device, a fixed frame installed on the base and beside the detection port, and a telescopic rod. The extending end of the telescopic rod is equipped with a material receiving hopper that can switch between the material receiving state and the material discharging state. The telescopic rod is installed on the fixed frame and is used to drive the material receiving hopper to move between the blanking area and the detection port through telescopic movement. This device reasonably connects and matches the device with the detection device through the detection port on the base, and by driving the telescopic rod to extend into the blanking area, the material receiving hopper in the material receiving state can take materials online in the blanking area. The device can take a small amount of materials each time and take materials quickly by means of the material receiving hopper; the device also drives the telescopic rod to retract to the detection port, so that the material sample in the material receiving hopper can be quickly and efficiently transported to the detection device for online detection. The device has few material transfer times and a fast and efficient material transmission process, so as to improve the efficiency and safety of material detection.

[0026] An online detection system according to an embodiment of the present invention includes a first conveying device, a second conveying device, a detection device, and the above-mentioned bulk material online sampling device. A blanking area is constructed between the first conveying device and the second conveying device; the detection port of the above-mentioned device is connected to the detection device, and the feeding hopper of the above-mentioned device can move between the blanking area and the detection port. By setting the above-mentioned bulk material online sampling device, the online detection system has all the advantages of the above-mentioned bulk material online sampling device, which will not be elaborated here.

[0027] A method for online sampling of bulk materials according to an embodiment of the present invention is executed by the above-mentioned bulk material online sampling device or by the above-mentioned online detection system; the method for online sampling of bulk materials includes: driving the telescopic rod to extend relative to the fixed frame until the feeding hopper is located in the blanking area and keeping the feeding hopper in the material receiving state; driving the telescopic rod to retract relative to the fixed frame until the feeding hopper is located above the detection port and keeping the feeding hopper in the material discharging state. This online sampling method utilizes the telescopic movement of the telescopic rod to achieve rapid and efficient transfer of materials between the blanking area and the detection device, accelerating the transmission process and reducing the number of transfers; this method can also utilize the state switching of the feeding hopper to achieve material receiving and discharging, and achieve a small amount of material taken and controllable sampling of sample materials.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0030] Figure 1 It is a schematic diagram of the working state of the bulk material online sampling device in the online detection system according to an embodiment of the present invention;

[0031] Figure 2 It is a schematic structural diagram of the bulk material online sampling device according to an embodiment of the present invention;

[0032] Figure 3 It is a top view of the bulk material online sampling device according to an embodiment of the present invention;

[0033] Figure 4 is Figure 3 a cross-sectional view taken along the line A-A shown in

[0034] Figure 5Yes Figure 3 The sectional view taken along the line B-B shown in the figure;

[0035] Figure 6 It is a schematic structural view of the material taking hopper of the bulk material on-line sampling device in the embodiment of the present invention in a closed state;

[0036] Figure 7 It is a schematic structural view of the material taking hopper of the bulk material on-line sampling device in the embodiment of the present invention in an open state.

[0037] Reference numerals:

[0038] 1: Bulk material on-line sampling device (abbreviated as "device" for short);

[0039] 101: Material taking hopper; 102: Telescopic rod; 103: First retaining wheel; 104: Fixed frame; 105: Driving motor; 106: Thrust rod; 107: Contact rod; 108: Second retaining wheel; 109: Driving wheel; 110: Base; 111: Pin roller; 112: Elastic member;

[0040] 1201: Fixed hopper; 1202: Openable and closable hopper;

[0041] 2: Detection device;

[0042] 201: Funnel; 202: Detection container;

[0043] 3: First conveying device; 4: Second conveying device. Detailed implementation manners

[0044] The following further describes in detail the implementation manners of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0045] As Figures 1 to 7 shown, the embodiment of the present invention provides a bulk material on-line sampling device 1 (abbreviated as "device" in the embodiment of the present invention), and the bulk material on-line sampling device 1 is used to take materials from the blanking area and send them to the detection device 2. Based on the device 1, the embodiment of the present invention also provides an on-line detection system (abbreviated as "system" in the embodiment of the present invention) and a bulk material on-line sampling method (abbreviated as "method" in the embodiment of the present invention).

[0046] Specifically, as Figure 2As shown, the device 1 includes a base 110, a fixing frame 104, and a telescopic rod 102. The base 110 can be fixed on the detection device 2. There is a detection port on the base 110 for connecting the detection device 2, and the detection port on the base 110 is used to reasonably connect and match the device 1 with the detection device 2. Preferably, the detection port is arranged above the detection container 202 of the detection device 2 to improve the accuracy and safety of the material falling into the detection device 2 through the detection port. The fixing frame 104 is installed on the base 110 and beside the detection port. The fixing frame 104 can serve as a supporting component for the movement of the telescopic rod 102 and play a guiding role in the movement of the telescopic rod 102. The extending end of the telescopic rod 102 is equipped with a material taking hopper 101 that can be switched between the material taking state and the material discharging state. The telescopic rod 102 is installed on the fixing frame 104 and is used to drive the material taking hopper 101 to move between the material falling area and the detection port through telescopic movement. The device 1 drives the telescopic rod 102 to extend into the material falling area so that the material taking hopper 101 in the material taking state can take materials online in the material falling area. By means of the material taking hopper 101 taking materials, the device 1 can have a small single material taking amount and fast material taking. The device 1 also drives the telescopic rod 102 to retract to the detection port, so as to quickly and efficiently convey the material sample in the material taking hopper 101 into the detection device 2 for online detection. The device 1 has few material flow turnover times and a fast and efficient material transmission process to improve the efficiency and safety of material detection.

[0047] It can be understood that the material falling area described in the embodiment of the present invention refers to the material falling area formed in any production process on the production line. For example, the material falling area constructed between the discharge port of the mixer and the discharge mechanism, or the material falling area constructed between the feeding mechanism and the feeding port of the granulator or the roasting machine.

[0048] It can be understood that the detection device 2 described in the embodiment of the present invention is preferably an online material mixing degree detection device 2, so as to online monitor the mixing degree of multi-component materials and feedback to the mixing equipment for adjustment to ensure that the materials are kept in a good mixing state.

[0049] It can be understood that in order to make the telescopic movement of the telescopic rod 102 the shortest and the material flow efficiency the highest, preferably, the fixing frame 104 and the material falling area are respectively arranged on opposite sides of the detection port, so that the material falling area and the detection port are both located along the length direction of the telescopic rod 102 and its extension direction, so that the telescopic rod 102 can directly point to the material falling area for telescopic movement.

[0050] It can be understood that the inside of the material taking hopper 101 described in the embodiment of the present invention is provided with a receiving cavity with a predetermined volume. The material taking hopper 101 is detachably installed on the telescopic end of the telescopic rod 102 through a locking mechanism such as bolts or screws, so that a material taking hopper 101 with a suitable volume can be installed according to the material taking amount requirement of the material sample.

[0051] It is understandable that the material taking state of the material taking hopper 101 means that the material can enter and remain in the material receiving cavity; correspondingly, the material taking hopper 101 is in the material discharging state means that the material can leave the material receiving cavity.

[0052] In one embodiment, in order to enable the material taking hopper 101 to flexibly and dynamically switch states according to the telescopic movement of the telescopic rod 102, the material taking hopper 101 described in the embodiment of the present invention includes a fixed hopper 1201 and an opening and closing hopper 1202 that are interconnected. The fixed hopper 1201 is detachably mounted on the protruding end of the telescopic rod 102, and a material receiving opening is provided at the top of the fixed hopper 1201, and the material receiving opening can be set to a normally open state, so as to facilitate the material taking hopper 101 to receive materials in the material dropping area. The opening and closing hopper 1202 is pivotally connected to the fixed hopper 1201. An openable and closable discharge port is formed between the bottom of the opening and closing hopper 1202 and the bottom of the fixed hopper 1201, and the discharge port is used to open when the material taking hopper 101 is in a discharging state and to close when the material taking hopper 101 is in a material taking state.

[0053] Preferably, an open material receiving opening is configured at the top of the fixed bucket 1201. One end of the top of the fixed bucket 1201 away from the extended end of the telescopic rod 102 is connected to the top of the opening and closing bucket 1202 via a rotating shaft, so that the opening and closing bucket 1202 can rotate relative to the fixed bucket 1201, thereby configuring an openable and closable material discharge port between the bottom of the opening and closing bucket 1202 and the bottom of the fixed bucket 1201 through the relative rotation between the opening and closing bucket 1202 and the fixed bucket 1201.

[0054] It should be noted that a pair of connecting plates can be extended from the side of the opening and closing bucket 1202 and the side of the fixed bucket 1201 respectively and opposite to each other, and the two pairs of connecting plates are connected by a rotating shaft, so that the opening and closing bucket 1202 and the fixed bucket 1201 can rotate relative to each other. When the opening and closing bucket 1202 rotates to a state where the top of the opening and closing bucket 1202 is closed to the top of the fixed bucket 1201, the bottom of the opening and closing bucket 1202 is separated from the bottom of the fixed bucket 1201, so that an open discharge port can be constructed between the bottom of the opening and closing bucket 1202 and the bottom of the fixed bucket 1201. Correspondingly, when the opening and closing bucket 1202 rotates to a state where the top of the opening and closing bucket 1202 is separated from the top of the fixed bucket 1201, the bottom of the opening and closing bucket 1202 is closed with the bottom of the fixed bucket 1201, so that the discharge port constructed between the bottom of the opening and closing bucket 1202 and the bottom of the fixed bucket 1201 is closed, and an open material receiving opening is formed due to the separation between the top of the opening and closing bucket 1202 and the top of the fixed bucket 1201. This setting enables the material receiving opening of the material taking hopper 101 to open and automatically close the discharge port in the material taking state, and the material taking hopper 101 can close the material receiving opening and automatically open the discharge port in the material discharging state, so that the material taking hopper 101 can better protect the material and prevent spillage in different states.

[0055] In one embodiment, as Figure 3 shown, the bottom of the opening and closing hopper 1202 is connected to the telescopic rod 102 through an elastic member 112. The elastic member 112 is used to close the discharging opening by biasing, so that the elastic action can drive the opening and closing hopper 1202 to reset, that is, the setting of the elastic member 112 can ensure that the discharging opening is normally closed. Specifically: as Figure 7 shown, during the process of the material taking hopper 101 switching from the material taking state to the discharging state, the opening and closing hopper 1202 is forced to rotate and drive the discharging opening to open, and the bottom of the opening and closing hopper 1202 drives the elastic member 112 to be stretched under force; correspondingly, as Figure 6 shown, during the process of the material taking hopper 101 switching from the discharging state to the material taking state, due to the reset action of the elastic member 112, the opening and closing hopper 1202 is driven to automatically close. This setting can ensure that the material taking hopper 101 accurately opens the discharging opening above the detection port, effectively preventing material scattering.

[0056] Preferably, the elastic member 112 is a spring, one end of the spring is connected to one side of the bottom of the opening and closing hopper 1202, and the other end is connected to the same side of the telescopic rod 102.

[0057] In one embodiment, as Figure 3 shown, a touch rod 107 is provided at the bottom of the opening and closing hopper 1202, and a push rod 106 corresponding to the detection port is provided on the fixed frame 104, and the push rod 106 and the touch rod 107 are arranged opposite to each other. The push rod 106 is used to push the touch rod 107 to drive the discharging opening located above the detection port to open. In other words, when the telescopic rod 102 drives the material taking hopper 101 to move above the detection port, the push rod 106 on the fixed frame 104 pushes the touch rod 107, so that the touch rod 107 drives the opening and closing hopper 1202 to rotate and open the discharging opening. This setting can also ensure that the material taking hopper 101 accurately opens the discharging opening above the detection port, effectively preventing material scattering.

[0058] It can be understood that preferably, the above-mentioned structures of the elastic member 112, the touch rod 107 and the push rod 106 are combined to ensure the accurate discharging and rapid reset of the material taking hopper 101, and further improve the material flow accuracy and safety.

[0059] It can be understood that, as Figure 3As shown, preferably, the elastic member 112 and the contact rod 107 are respectively arranged on both sides of the telescopic rod 102, and the ejector rod 106 is arranged at one end of the fixed frame 104 facing the material taking hopper 101, and it is ensured that the ejector rod 106 and the contact rod 107 are arranged opposite to each other, so as to ensure that the elastic force of the elastic member 112 and the pushing action between the ejector rod 106 and the contact rod 107 do not interfere with each other, and the structure is reasonably optimized. Further preferably, both the contact rod 107 and the ejector rod 106 are located beside the detection port, so that the material in the material taking hopper 101 will not touch the ejector rod 106 and the contact rod 107 during the process of falling into the detection port, thereby further preventing material spillage.

[0060] It can be understood that, as Figure 1 , Figure 6 and Figure 7 shown, in order to improve the accuracy of the material taking hopper 101 of the device 1 for feeding materials into the detection device 2, preferably, the detection port is correspondingly arranged above the detection container 202 of the detection device 2. Further, in order to improve the accuracy of the material falling from the material taking hopper 101 into the detection port, preferably, a funnel 201 is installed in the detection port to expand the material falling range from the material taking hopper 101 to the detection port and prevent the material from overflowing and scattering during the material falling process.

[0061] In one embodiment, a driving mechanism and a guiding mechanism are installed on the fixed frame 104. The driving mechanism is connected to the telescopic rod 102 and is used to drive the telescopic rod 102 to perform telescopic movement relative to the fixed frame 104. The guiding mechanism is provided with a guiding channel for the telescopic rod 102 to perform telescopic movement. The guiding channel can not only guide the telescopic direction of the telescopic rod 102, but also monitor the state of the telescopic movement of the telescopic rod 102.

[0062] In one embodiment, as Figure 3 and Figure 4 shown, the driving mechanism includes a driving motor 105 and a driving wheel 109 respectively installed on the fixed frame 104. The driving motor 105 is connected to the driving wheel 109, and the driving motor 105 is used to drive the driving wheel 109 to rotate. A plurality of pin rollers 111 are arranged at intervals along the length direction of the telescopic rod 102. A plurality of teeth are provided on the outer edge of the driving wheel 109, and the driving wheel 109 drives each tooth to mesh with each pin roller 111 through rotation. Since there is a gap between adjacent pin rollers 111, the driving wheel 109 drives the telescopic rod 102 to perform telescopic movement along its own length direction through each tooth inserted into each gap in turn during the rotation process.

[0063] It can be understood that, as Figure 3As shown, the fixing bracket 104 includes two relatively arranged fixing plates, and a space for the telescopic rod 102 to move is left between the two fixing plates. The driving motor 105 is installed on any one of the fixing plates and is located outside the fixing bracket 104, and the driving shaft of the driving motor 105 passes through the fixing bracket 104 and is inserted into the shaft hole of the driving wheel 109, so that the driving wheel 109 is rotatably installed inside the fixing bracket 104 and is respectively connected to the inside and outside of the fixing plate on both sides of the fixing plate.

[0064] It should be noted that the inside of the fixing bracket 104 described in the embodiment of the present invention refers to the space between the two fixing plates.

[0065] In one embodiment, as Figure 3 , Figure 4 and Figure 5 shown, the guiding mechanism includes at least two sets of retaining wheel sets, and each set of retaining wheel sets is installed on the fixing bracket 104 along the length direction of the telescopic rod 102 to jointly construct a guiding channel by the arrangement of multiple sets of retaining wheel sets. Among them, each set of retaining wheel sets includes a first retaining wheel 103 and a second retaining wheel 108. The first retaining wheel 103 and the second retaining wheel 108 of each group are respectively in rolling fit with the upper end and the lower end of the telescopic rod 102, and a guiding channel is constructed between the first retaining wheel 103 and the second retaining wheel 108 of each group.

[0066] Preferably, as Figure 5As shown, preferably along the cross-section of the telescopic rod 102, the upper end of the cross-section of the telescopic rod 102 is configured as a triangle. The function is that since the telescopic rod 102 and the fixed frame 104 together form a long cantilever structure, the materials in the blanking area during the material taking process will generate a large impact force on the telescopic end of the telescopic rod 102. The upper end of the cross-section of the telescopic rod 102 being configured as a triangle is conducive to reducing the force and preventing the telescopic rod 102 from deforming under the impact of the falling materials during long-term operation. Correspondingly, in order to reasonably optimize the structure and facilitate driving the telescopic rod 102 to move, preferably the lower end of the cross-section of the telescopic rod 102 is configured as a hollow structure, that is, the tops of the two side walls of the telescopic rod 102 are closed to form the top of the triangle, and the bottoms of the two side walls are separated to form the above-mentioned hollow mechanism between the two side walls. And, a number of pin rollers 111 are arranged at intervals between the bottoms of the two side walls. Preferably, the pin rollers 111 are arranged at equal intervals. To further reasonably optimize the structure and save space, preferably the driving wheel 109 is arranged below the telescopic rod 102 and is located between the two second retaining wheels 108. Through the meshing of the pin rollers 111 and the driving wheel 109, the rotational motion of the driving wheel 109 is converted into the linear motion of the telescopic rod 102. To ensure the smooth operation of the telescopic rod 102 and prevent the telescopic rod 102 from moving up and down, preferably the wheel surface of the first retaining wheel 103 at the top of the telescopic rod 102 is provided with a pointed groove matching the top of the telescopic rod 102, which can effectively prevent the telescopic rod 102 from moving in the vertical direction of its telescopic motion.

[0067] Thus, it can be seen that the fixed frame 104, the driving mechanism and the guiding mechanism described in the embodiment of the present invention are configured as an open structure. In this way, even if dust adheres to the telescopic rod 102 and the driving wheel 109, the open structure of the driving mechanism can automatically shed the dust through the operation of the components during the driving meshing process, so as to ensure the smooth operation of the device 1 and prevent the situation that the device 1 is stuck due to the adhesion of water-containing dust to the driving mechanism or the guiding mechanism.

[0068] In one embodiment, a pressure sensor is provided on the first retaining wheel 103. The pressure sensor is used to monitor the magnitude of the force exerted on the first retaining wheel 103 by the telescopic rod 102, so as to be able to determine whether the material collecting hopper 101 has successfully collected the material and monitor the operating state of the telescopic rod 102. Preferably, two sets of retaining wheel groups are installed in the fixing frame 104. One set of retaining wheel groups is located at one end of the fixing frame 104 facing the material collecting hopper 101, and the other set of retaining wheel groups is located at one end of the fixing frame 104 away from the material collecting hopper 101. Taking the end of the fixing frame 104 facing the material collecting hopper 101 as the front end, since the telescopic rod 102 and the fixing frame 104 together form a cantilever structure, the length of the cantilever section (i.e., the extended section) of the telescopic rod 102 will gradually change during the operation of the device 1. During the extension process of the telescopic rod 102, the cantilever section of the telescopic rod 102 gradually becomes longer, so the force exerted on the first retaining wheel 103 at the front end of the fixing frame 104 by the telescopic rod 102 gradually becomes smaller, while the force exerted on the first retaining wheel 103 at the rear end of the fixing frame 104 by the telescopic rod 102 gradually becomes larger; correspondingly, during the retraction process of the telescopic rod 102, the cantilever section of the telescopic rod 102 gradually becomes shorter, so the force exerted on the first retaining wheel 103 at the front end of the fixing frame 104 by the telescopic rod 102 gradually becomes larger, while the force exerted on the first retaining wheel 103 at the rear end of the fixing frame 104 by the telescopic rod 102 gradually becomes smaller. The above settings can detect the operating state of the telescopic rod 102 through the respective force changes of the first retaining wheels 103 of the front and rear two sets of retaining wheel groups. Moreover, when the telescopic rod 102 extends into the material dropping area, due to the impact of the falling material on the material collecting hopper 101 and the telescopic rod 102, a large force mutation is generated on the telescopic rod 102, and this mutated force will be transmitted to the two first retaining wheels 103 and detected by the pressure sensor. By judging the motion state of the telescopic rod 102 and collecting the data of the force mutation of the telescopic rod 102, it can be determined whether the material collecting hopper 101 has successfully collected the material.

[0069] An embodiment of the present invention also provides an on-line detection system. As Figure 1 shown, the system includes a first conveying device 3, a second conveying device 4, a detection device 2, and the above-mentioned bulk material on-line sampling device 1. In this system, a material dropping area is constructed between the first conveying device 3 and the second conveying device 4. The detection port of the above-mentioned device 1 is connected to the detection device 2, and the material collecting hopper 101 of the above-mentioned device 1 can move between the material dropping area and the detection port. By setting the above-mentioned bulk material on-line sampling device 1, the on-line detection system has all the advantages of the above-mentioned bulk material on-line sampling device 1, which will not be elaborated here.

[0070] An embodiment of the present invention also provides a method for on-line sampling of bulk materials. This method is executed by the above-mentioned bulk material on-line sampling device 1, or by the above-mentioned on-line detection system.

[0071] Specifically, the online sampling method includes:

[0072] Drive the telescopic rod 102 to extend relative to the fixed frame 104 until the material receiving hopper 101 is located within the material dropping area, and keep the material receiving hopper 101 in the material receiving state;

[0073] Drive the telescopic rod 102 to retract relative to the fixed frame 104 until the material receiving hopper 101 is located above the detection port, and keep the material receiving hopper 101 in the material discharging state.

[0074] It can be understood that the above steps are not in a specific order. It can be that the telescopic rod 102 extends first and then retracts, or it can be that the telescopic rod 102 retracts first and then extends. Just determine the starting action according to the specific position of the telescopic rod 102 during the use process of the device 1 and the system.

[0075] This online sampling method utilizes the telescopic movement of the telescopic rod 102 to achieve the rapid and efficient transfer of materials between the material dropping area and the detection device 2, speeding up the transmission process and reducing the number of transfers; this method can also utilize the state switching of the material receiving hopper 101 to achieve material receiving and discharging, and achieve a small amount of material taken and controllable sampling of the sample material.

[0076] The above embodiments are only used to illustrate the present invention, rather than limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should all be covered within the scope of the claims of the present invention.

[0077] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0078] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified or limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0079] In the embodiments of the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely means that the first feature has a lower horizontal height than the second feature.

[0080] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments 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, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

Claims

1. An on-line sampling device for bulk materials, characterized in that, Comprising: A base, on which a detection port for connecting a detection device is provided; A fixing frame, mounted on the base and beside the detection port; A telescopic rod, with a material taking hopper capable of switching between a material taking state and a material discharging state mounted at its extending end; the telescopic rod is mounted on the fixing frame and is used to drive the material taking hopper to move between a blanking area and the detection port through telescopic movement; A driving mechanism and a guiding mechanism are mounted on the fixing frame, the driving mechanism is connected to the telescopic rod, and a guiding channel for the telescopic rod to perform telescopic movement is provided on the guiding mechanism; The guiding mechanism includes at least two groups of retaining wheel sets, and each group of retaining wheel sets is mounted on the fixing frame along the length direction of the telescopic rod; Each group of retaining wheel sets includes a first retaining wheel and a second retaining wheel. The first retaining wheel and the second retaining wheel of each group are respectively in rolling cooperation with the upper end and the lower end of the telescopic rod, and the guiding channel is formed between the first retaining wheel and the second retaining wheel of each group; The tops of the two side walls of the telescopic rod are closed to form a triangular top, and the bottoms of the two side walls are separated to form a hollow structure between the two side walls; a pointed groove matching the top of the telescopic rod is provided on the wheel surface of the first retaining wheel located at the top of the telescopic rod.

2. The on-line sampling device for bulk materials according to claim 1, characterized in that, The material taking hopper includes a fixed hopper and an opening and closing hopper that are interconnected. The fixed hopper is detachably mounted at the extending end of the telescopic rod, and a material receiving opening is provided at the top of the fixed hopper; the opening and closing hopper is pivotally connected to the fixed hopper, and an openable and closable material discharging port is formed between the bottom of the opening and closing hopper and the bottom of the fixed hopper. The material discharging port is used to open in the material discharging state and close in the material taking state.

3. The online sampling device for bulk materials according to claim 2, wherein The bottom of the opening and closing hopper is connected to the telescopic rod through an elastic member, and the elastic member is used to close the material discharging port by biasing.

4. The on-line sampling device for bulk materials according to claim 3, wherein, A touch rod is provided at the bottom of the opening and closing hopper, and a push rod corresponding to the detection port is provided on the fixing frame. The push rod and the touch rod are arranged opposite to each other, and the push rod is used to push the touch rod to drive the material discharging port located above the detection port to open.

5. The on-line sampling device for bulk materials according to any one of claims 1-4, characterized in that The driving mechanism includes a driving motor and a driving wheel respectively mounted on the fixing frame. A plurality of pin rollers are arranged at intervals along the length direction of the telescopic rod. A plurality of teeth are provided on the outer edge of the driving wheel, and the driving wheel drives each tooth to mesh with each pin roller through rotation; the driving wheel is connected to the driving motor.

6. The bulk material on-line sampling device according to any one of claims 1-4, characterized in that, A pressure sensor is provided on the first retaining wheel.

7. An online detection system, characterized in that, Including a first conveying device, a second conveying device, a detection device, and the bulk material on-line sampling device according to any one of claims 1 to 6. A blanking area is formed between the first conveying device and the second conveying device; the detection port of the bulk material on-line sampling device is connected to the detection device, and the material taking hopper of the bulk material on-line sampling device can move between the blanking area and the detection port.

8. An on-line sampling method for bulk materials, characterized in that, Executed by the bulk material on-line sampling device according to any one of claims 1 to 6, or executed by the on-line detection system according to claim 7; The bulk material on-line sampling method includes: Drive the telescopic rod to extend relative to the fixed frame until the material taking hopper is located within the material dropping area, and keep the material taking hopper in the material receiving state; Drive the telescopic rod to retract relative to the fixed frame until the material taking hopper is located above the inspection port, and keep the material taking hopper in the material discharging state.

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