Sampling device and conveying system

Abstract

The invention discloses a sampling device and a conveying system, and the sampling device comprises a sampling assembly which comprises a sampling unit and a first driving unit, and the first driving unit is used for driving the sampling unit to rotate in a conveying pipeline; the sampling assembly comprises a sampling bottle, a sampling channel and a driving assembly, the sampling bottle is connected with the sampling channel, and a first valve is arranged in the sampling channel; the driving assembly is used for controlling connection and disconnection of the sampling bottle and the sampling channel; when the first driving unit drives one end of the sampling unit to be communicated with the sampling channel, the other end of the sampling unit can cut into the center of the conveying pipeline for sampling, and the driving assembly controls the sampling bottle to be communicated with the sampling unit through the sampling channel; a sample enters the sampling bottle from the sampling unit through the sampling channel and is stored in the sampling bottle. According to the sampling device and the conveying system, the problem that sampling is not representative can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of powder sampling, and more particularly, to a sampling device and a conveying system. Background Art

[0002] Pneumatic powder conveying is a method of transferring powders based on the principle of gas-solid two-phase flow. Its core mechanism is to use the kinetic potential energy generated by compressed gas to directionally transfer powders within a closed pipeline. Carried by a gas medium (typically air or an inert gas), the powder particles form a uniform suspended flow. Precisely controlling gas flow rate, pressure gradient, and flow parameters enables stable conveying of powders with varying physical properties. Due to its airtightness, continuity, and automated control, it is widely used in powder conveying applications in industries such as coal-fired power generation, pharmaceuticals, chemicals, and food processing.

[0003] When collecting samples, existing sampling devices find it difficult to collect samples from the center of the pipeline. The collected samples are not representative and cannot truly reflect the actual distribution state of the powder in the pipeline, affecting the reliability of the samples.

[0004] Therefore, a sampling device and a conveying system are needed to solve the above problems. Summary of the Invention

[0005] In view of this, the purpose of the present application is to provide a sampling device and a conveying system to solve the problem that the sampling effect provided by the existing sampling device is not ideal.

[0006] Based on the above purpose, the present application provides a sampling device, comprising:

[0007] A sampling assembly, comprising a sampling unit and a first driving unit, wherein the first driving unit is used to drive the sampling unit to rotate in the delivery pipe;

[0008] A sampling assembly, comprising a sampling bottle, a sampling channel, and a drive assembly, wherein the sampling bottle is connected to the sampling channel, and a first valve is provided on the sampling channel; the drive assembly is used to control the on-off of the sampling bottle and the sampling channel;

[0009] When the first driving unit drives one end of the sampling unit to connect with the sampling channel, the other end of the sampling unit can cut into the center of the conveying pipe for sampling. The driving component controls the sampling bottle to connect with the sampling unit through the sampling channel, and the sample enters the sampling bottle through the sampling channel from the sampling unit and is stored in the sampling bottle.

[0010] Optionally, the sampling assembly further includes: a cleaning unit and a dust storage box, the cleaning unit is used to clean the sampling unit; a second valve is provided on the dust storage box; when the first driving unit drives the sampling unit to connect with the dust storage box, powder or impurities enter the dust storage box from the sampling unit.

[0011] Optionally, the sampling unit includes a sampling tube, which includes an inner tube wall and an outer tube wall arranged concentrically, and the inner tube wall can be connected to the sampling channel or the dust storage box; the cleaning unit is arranged in the annular gap between the inner tube wall and the outer tube wall, and can provide vibration to the inner tube wall.

[0012] Optionally, the cleaning unit is at least one group of vibration components, which include at least one vibration shaft, multiple cams and a vibration motor, the cam is mounted on the vibration shaft and contacts the inner tube wall; the vibration motor is used to drive the vibration shaft to drive the cam to vibrate and transmit it to the inner tube wall.

[0013] Optionally, the first driving unit includes a driving motor, a rotating shaft and a sealing member, the driving motor is connected to the rotating shaft, a through hole is provided on the conveying pipe, the free end of the rotating shaft is passed through the through hole and is connected to the sampling unit; the sealing member is used to seal the through hole.

[0014] Optionally, the driving assembly includes a lifting rod, a second driving unit and a reset unit, the lifting rod can move back and forth along the sampling channel; the second driving unit drives the lifting rod to move toward a side away from the sampling unit, at least so that the sampling bottle is connected to the sampling unit through the sampling channel; the reset unit drives the lifting rod to reset.

[0015] Optionally, a scraper is provided at the free end of the lifting rod.

[0016] Optionally, the sampling bottle includes an inner bottle body and an outer bottle body at least partially sleeved on the outside of the inner bottle body, the inner bottle body is communicated with the sampling channel, and the outer bottle body is movably connected to the inner bottle body.

[0017] The present application also provides a delivery system, comprising:

[0018] A delivery pipeline, wherein a sampling port is provided on the delivery pipeline;

[0019] As for the sampling device mentioned above, the sampling unit of the sampling device can be rotatably connected in the conveying pipe; the sampling channel of the sampling device is connected to the sampling port.

[0020] Optionally, when the sampling unit is connected to the sampling channel through a sampling port, the axes of the sampling unit and the sampling channel coincide with or are parallel.

[0021] As can be seen from the foregoing, the sampling device and conveying system provided by this application have the following advantages over the prior art: the sampling device can switch back and forth between the conveying state and the sampling state. In the conveying state, it can avoid increasing the resistance of the conveying pipeline and ensure the normal conveying of the powder. In the sampling state, the sampling unit can intercept the powder flow in the center of the pipeline, ensuring representative sampling, accurately reflecting the actual distribution of the powder in the conveying pipeline, and ensuring the reliability of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above features and technical advantages of the present application will become clearer and easier to understand through the following description of its embodiments in conjunction with the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the first usage state of the sampling device used in the specific embodiment of the present application.

[0024] Figure 2 for Figure 1 Schematic diagram of the second usage state of the sampling device shown.

[0025] Figure 3 for Figure 1 Schematic diagram of the third usage state of the sampling device shown.

[0026] Figure 4 for Figure 1 Schematic diagram of the sampling unit and cleaning unit of the sampling device shown.

[0027] Figure 5 for Figure 1 A side view of the first drive unit of the sampling device is shown.

[0028] Wherein the accompanying drawings are:

[0029] 1. Sampling unit; 101. Inner tube wall; 102. Outer tube wall; 2. Sampling assembly; 21. Base plate; 22. Return spring; 23. Pull rod; 24. End plate; 25. Lifting rod; 26. Push head; 27. Scraper; 3. Dust storage box; 31. Visual window; 32. Sealing door; 4. Sampling bottle; 41. Inner bottle body; 42. Outer bottle body; 5. Rotating shaft; 6. Conveying pipe; 7. Driving motor; 8. Sealing gasket; 9. Inclined end face; 10. Elastic sealing strip; 11. Solenoid valve; 12. Vibration assembly; 121. Vibration motor; 122. Horizontal rotation axis; 123. Vertical rotation axis; 124. Bevel gear 1; 125. Bevel gear 2; 126. Cam. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of this application more clearly understood, the present application is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. Identical parts are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings. The terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0031] Figure 1 This is a schematic diagram of the first usage state of the sampling device used in the specific embodiment of the present application. Figure 2 for Figure 1 Schematic diagram of the second use state of the sampling device shown in FIG. Figures 1 to 2 As shown, the sampling device includes a sampling component and a sampling component 2.

[0032] The sampling assembly includes a sampling unit 1 and a first drive unit, which is configured to drive the sampling unit 1 to rotate within the delivery pipe 6. The sampling unit 1 is installed within the delivery pipe 6, typically relatively below the axis of the delivery pipe 6, and is capable of reciprocating within the delivery pipe 6 within a preset range. A sampling port is provided on the delivery pipe 6, and the sampling unit 1 has inclined end surfaces 9 at opposite ends, each of which is configured to abut against the sampling port. For example, the maximum rotation range is as follows: when rotating clockwise, the right end of the sampling unit 1 can abut against the lower wall of the delivery pipe 6 or a designated location, while the left end of the sampling unit 1 can penetrate the center of the delivery pipe 6; when rotating counterclockwise, the left end of the sampling unit 1 can abut against the wall of the delivery pipe 6 or a designated location, while the right end of the sampling unit 1 can penetrate the center of the delivery pipe 6. The driving end of the first drive unit is disposed through the delivery pipe 6 and connected to the sampling unit 1, thereby driving the sampling unit 1 to rotate reciprocally within a preset range. When the sampling unit 1 is in the non-sampling state, the driving unit drives the sampling unit 1 to rotate until its axis is parallel to the axis of the conveying pipe 6, so that the powder in the conveying pipe 6 can effectively pass through the sampling unit 1, while reducing the impact of the sampling unit 1 on the conveying pipe 6.

[0033] The sampling assembly 2 includes a sampling bottle 4, a sampling channel, and a drive assembly. The sampling bottle 4 is connected to the sampling channel, and a first valve is provided on the sampling channel. When the first valve is open, the sampling channel is connected to the sampling unit 1 at the sampling port. When the first valve is closed, the sampling channel is disconnected from the sampling unit 1. The drive assembly is used to control the on / off of the sampling bottle 4 and the sampling channel. A sampling port is provided on the delivery pipe 6, and the sampling channel and the sampling unit 1 are connected at the sampling port. The first valve is provided near the sampling port. The sampling channel is installed obliquely below the delivery pipe 6, and the sampling bottle 4 is installed vertically below the sampling channel. The sampling channel located outside the delivery pipe 6 is connected to the sampling port, and the sampling unit 1 located inside the delivery pipe 6 can be rotated to connect to the sampling port. That is, when sampling, the first valve is opened, and the sampling unit 1 and the sampling channel are connected at the sampling port. Specifically, when sampling, the first valve is opened, the sampling channel is connected to the sampling unit 1, and the driving component controls the sampling bottle 4 and the sampling channel to switch from disconnection to connection; after sampling is completed, the first valve is closed, the sampling channel is disconnected from the sampling unit 1, and the driving component controls the sampling bottle 4 and the sampling channel to switch from connection to disconnection.

[0034] When the first driving unit drives one end of the sampling unit 1 to connect with the sampling channel, the other end of the sampling unit 1 can cut into the center of the conveying pipe 6 for sampling. The driving component controls the sampling bottle 4 to connect with the sampling unit 1 through the sampling channel. The sample enters from the sampling unit 1 through the sampling channel and is stored in the sampling bottle 4.

[0035] The delivery pipe 6 has two states: one is the delivery state and the other is the state of being sampled during the delivery process. The sampling unit 1 has at least two states: one is the delivery state and the other is the sampling state. The sampling component 2 has two states: one is the closed state and the other is the open state.

[0036] A sampling port is provided on the conveying pipe 6; when the conveying pipe 6 is in the conveying state, the first valve is closed and the conveying pipe 6 is relatively closed; the first driving unit drives the sampling unit 1 to switch to the first usage state (i.e., the conveying state), that is, the sampling unit 1 rotates until its axis is parallel to the axis of the conveying pipe 6, and the powder passes through the sampling unit 1 and continues to move in the conveying pipe 6; the sampling component 2 is in a closed state, that is, the sampling channel is not connected to the conveying pipe 6, and the sampling bottle 4 is not connected to the sampling channel.

[0037] When the conveying pipe 6 is in the sampling state during the conveying process, the first driving unit drives the sampling unit 1 to rotate clockwise until the right end of the sampling unit 1 abuts the sampling port of the conveying pipe 6. The first valve controls the sampling channel to open, so that the sampling unit 1 and the sampling channel are connected through the sampling port, and the left end of the sampling unit 1 can cut into the center of the conveying pipe 6; that is, the sampling unit 1 switches to the second use state (that is, the sampling state); the sampling component 2 is in the open state, that is, the first valve is opened, and the sampling pipe is connected to the sampling unit 1; at the same time, the driving component is started, so that the sampling bottle 4 and the sampling channel are connected; at this time, the powder in the center of the conveying pipe 6 enters the sampling unit 1 from the left end, and the sample obtained by the sampling unit 1 enters the sampling channel from the right end through the sampling port, and then enters the sampling bottle 4 through the sampling channel, completing the sampling and sampling work.

[0038] In one embodiment of the present application, the first valve includes but is not limited to a solenoid valve 11, and an annular sealing groove is provided on the periphery of the solenoid valve 11, and a lifting plate and a sealing spring are provided in the annular sealing groove. The lifting plate can open and close the annular sealing groove by reciprocating movement, and the sealing spring is used to drive the lifting plate to reset; an elastic sealing strip 10 is provided at the inclined end face 9 of the sampling unit 1, and the solenoid valve 11 of the sampling channel is opened, and the elastic sealing strip 10 pushes the lifting plate downward to squeeze the sealing spring to cause deformation, and the lifting plate moves to be embedded in the annular sealing groove to seal, so as to ensure the sealing at the sampling port. The sampling unit 1 and the sampling channel are relatively airtightly connected at the sampling port. When the sampling unit 1 leaves the sampling port, the sealing spring pushes the lifting plate up and resets to restore the deformation.

[0039] The sampling device described above can switch back and forth between a conveying state and a sampling state. In the conveying state, it can avoid increasing the resistance of the conveying pipe 6 and ensure the normal conveyance of the powder. In the sampling state, the sampling unit 1 can intercept the powder flow in the center of the pipe, ensuring that the sampling is representative and can truly reflect the actual distribution of the powder in the conveying pipe 6, thereby ensuring the reliability of the sample.

[0040] Figure 3 for Figure 1 Schematic diagram of the third use state of the sampling device shown in FIG. Figure 3 As shown, the sampling device further includes: a cleaning unit and a dust storage box 3.

[0041] To avoid compromising sampling accuracy and ensure the cleanliness of the sampling unit 1, the sampling unit 1 also has a third operating state, namely a clean state. Optionally, the sampling assembly further includes a cleaning unit and a dust box 3. The cleaning unit is used to clean the sampling unit 1. The dust box 3 is provided with a second valve. When the second valve is opened, the dust box 3 can communicate with the sampling unit 1. When the second valve is closed, the dust box 3 is disconnected from the sampling unit 1. When the first drive unit drives the sampling unit 1 to communicate with the dust box 3, powder or impurities enter the dust box 3 from the sampling unit 1. The conveying pipe 6 is provided with a cleaning port. The cleaning port and the sampling port are arranged opposite and spaced apart at the bottom of the conveying pipe 6. Typically, the sampling port is located at the lower wall of the conveying pipe 6 where the right end of the sampling unit 1 abuts, and the cleaning port is located at the lower wall of the conveying pipe 6 where the left end of the sampling unit 1 abuts. When the second valve is open, the sampling unit 1 communicates with the dust box 3 at the cleaning port.

[0042] After the sampling unit 1 has finished sampling, in order to ensure the accuracy or cleanliness of the next sampling, the sampling unit 1 is cleaned first. Specifically, when the conveying pipe 6 is in a stationary state, the sampling component 2 is in a closed state; the first driving unit drives the sampling unit 1 to rotate counterclockwise until the left end of the sampling unit 1 abuts against the cleaning port of the conveying pipe 6, and the second valve is opened, so that the sampling unit 1 and the dust storage box 3 are connected through the cleaning port, and the right end of the sampling unit 1 can cut into the center of the conveying pipe 6; that is, the sampling unit 1 switches to the third use state (i.e., the cleaning state); at this time, the cleaning unit cleans the inner tube wall 101 of the sampling unit 1, so that impurities or retained powder are peeled off, move from the right end to the left end, and enter the dust storage box 3 through the cleaning port to complete the cleaning work.

[0043] In one embodiment of the present application, the dust box 3 is detachably connected to the conveying pipe 6, for example, by a threaded connection. The dust box 3 has a certain capacity, allowing it to collect multiple cleaning residues and then be cleaned, increasing convenience. A viewing window 31 is provided on the dust box 3, through which the amount of residue inside the dust box 3 can be observed for timely cleaning. The dust box 3 is also provided with a sealed door 32, which can be opened to clean the dust box 3.

[0044] In one embodiment of the present application, the second valve includes but is not limited to a solenoid valve 11. An annular sealing groove is provided on the periphery of the solenoid valve 11. A lifting plate and a sealing spring are provided in the annular sealing groove. The reciprocating movement of the lifting plate can open and close the annular sealing groove, and the sealing spring is used to drive the lifting plate to reset. An elastic sealing strip 10 is provided at the inclined end face 9 of the sampling unit 1. When the solenoid valve 11 of the dust storage box 3 is opened, the elastic sealing strip 10 pushes the lifting plate downward to squeeze the sealing spring to cause deformation. The lifting plate moves to be embedded in the annular sealing groove to seal and ensure the sealing at the cleaning port. The sampling unit 1 and the dust storage box 3 are relatively airtightly connected at the cleaning port. When the sampling unit 1 leaves the cleaning port, the sealing spring pushes the lifting plate upward to reset in order to restore the deformation.

[0045] Optionally, the sampling unit 1 includes a sampling tube comprising a concentrically arranged inner tube wall 101 and outer tube wall 102. The inner tube wall 101 is capable of communicating with a sampling channel or dust storage box 3. When the sampling unit 1 is in the sampling state, the inner tube wall 101 communicates with the sampling channel; when the sampling unit 1 is in the cleaning state, the inner tube wall 101 communicates with the dust storage box 3. A cleaning unit is disposed in the annular gap between the inner tube wall 101 and the outer tube wall 102 and is capable of providing vibration to the inner tube wall 101. The sampling tube is provided with inclined end surfaces 9 at opposite ends, and both are arranged in mirror-symmetrical fashion along the centerline of the sampling tube. These inclined end surfaces 9 allow for seamless connection between the sampling tube and the sampling port or cleaning port, ensuring a tight seal. Furthermore, in the sampling state, the inclined end surface 9 at the upper end is vertical, facilitating sampling. The inner tube wall 101 is used for sampling or powder circulation, while the outer tube wall 102 is connected to the first drive unit. The annular gap between the inner and outer tube walls 101, 102 provides space for the cleaning unit to be installed and operated, reducing both additional space and ensuring a smooth surface for the sampling tube, thereby reducing resistance. When activated, the cleaning unit vibrates the inner tube wall 101, causing retained matter to break away from it, achieving the cleaning objective.

[0046] In one embodiment of the present application, the sampling tube is square in structure, with a square annular gap between the inner tube wall 101 and the outer tube wall 102. A sealing panel can be provided at the end surface between the inner tube wall 101 and the outer tube wall 102 to prevent the sample from entering the annular gap.

[0047] Figure 4 for Figure 1 Schematic diagram of the sampling unit 1 and cleaning unit of the sampling device shown in FIG. Figure 4 As shown, the cleaning unit comprises two sets of vibrating assemblies 12 .

[0048] In order to ensure that the inner tube wall 101 is subjected to uniform force and achieve a good cleaning effect, the cleaning unit is optionally at least one set of vibration components 12. The vibration component 12 includes at least one vibration shaft, multiple cams, and a vibration motor. The cam is mounted on the vibration shaft and in contact with the inner tube wall 101. The vibration motor is used to drive the vibration shaft to drive the cam to vibrate and transmit it to the inner tube wall 101. The vibration motor drives the vibration shaft to rotate, and the cams on the vibration shaft can alternately squeeze the inner tube wall 101, so that the attached powder is peeled off during the vibration of the inner tube wall 101. When the sampling tube is polygonal, a set of vibration components 12 can be set on each side, or a set of vibration components 12 can be set on each adjacent two sides. The vibration motor can provide drive for one or two vibration shafts, and the adjacent vibration shafts are connected by a transmission member. Two or more cams are arranged at intervals on each vibration shaft, and the cams alternately squeeze the inner tube wall 101.

[0049] In one embodiment of the present application, the cleaning unit includes two groups of vibration assemblies 12 , the first group of vibration assemblies 12 is located at the bottom pipe section and the right pipe section, and the second group of vibration assemblies 12 is located at the top pipe section and the left pipe section. Taking the first group of vibration components 12 as an example, the vibration component 12 includes a vibration motor, a horizontal rotating shaft 122, a vertical rotating shaft 123, a cam 126, a bevel gear 124 and a bevel gear 2 125. The bevel gear 124 and the bevel gear 2 125 are meshed and connected with each other. The vibration motor is located in the lower left corner. The vibration motor is connected to the horizontal rotating shaft 122. The horizontal rotating shaft 122 is connected to the vertical rotating shaft 123 through the bevel gear 124 and the bevel gear 2 125. Two cams 126 are respectively provided on the horizontal rotating shaft 122 and the vertical rotating shaft 123. The phase difference between the cams of adjacent linkage modules is 90°. The driving motor 7 drives the horizontal rotating shaft 122 to rotate. The horizontal rotating shaft 122 drives the vertical rotating shaft 123 to rotate through the bevel gear 124 and the bevel gear 2 125. The cams 126 on the horizontal rotating shaft 122 and the vertical rotating shaft 123 alternately squeeze the inner tube wall 101. Among them, the horizontal rotating shafts 122 of the first group of vibration components 12 and the second group of vibration components 12 vibrate synchronously, the vertical rotating shafts 123 of the first group of vibration components 12 and the second group of vibration components 12 vibrate synchronously, and the horizontal rotating shafts 122 and the vertical rotating shafts 123 of the same group of vibration components 12 vibrate alternately, thereby peeling off the powder attached to the inner tube wall 101.

[0050] Figure 5 for Figure 1 A side view of the first drive unit of the sampling device shown in FIG. Figure 5 As shown, the first driving unit includes a driving motor 7, a rotating shaft 5 and a sealing member.

[0051] Optionally, the first driving unit includes a driving motor 7, a rotating shaft 5 and a sealing member. The driving motor 7 is connected to the rotating shaft 5. A through hole is provided on the delivery pipe 6. The free end of the rotating shaft 5 is passed through the through hole and is connected to the sampling unit 1. The sealing member is used to seal the through hole. The driving motor 7 is arranged outside the delivery pipe 6 to avoid occupying space inside the delivery pipe 6. The rotating shaft 5 passes through a side wall of the delivery pipe 6 and is perpendicular to the axis of the delivery pipe 6. One end of the rotating shaft 5 is connected to the driving motor 7, and the other end passes through a through hole and is connected to the sampling unit 1 in the delivery pipe 6. The driving motor 7 drives the sampling unit 1 to rotate by driving the rotating shaft 5. By providing a sealing member at the through hole, the sealing member includes but is not limited to a sealing gasket 8, the sealing of the delivery pipe 6 can be ensured.

[0052] Optionally, the drive assembly includes a lifting rod 25, a second drive unit, and a reset unit. The lifting rod 25 is capable of reciprocating along the sampling channel. The second drive unit drives the lifting rod 25 to move toward a side away from the sampling unit 1, at least so that the sampling bottle 4 is connected to the sampling unit 1 through the sampling channel. The reset unit drives the lifting rod 25 to reset. When the lifting rod 25 is in the initial position, the sampling bottle 4 can be connected to the sampling channel or not, and the sampling channel is not connected to the sampling unit 1. The lifting rod 25 reciprocates within the sampling channel, wherein the second drive unit drives the lifting rod 25 to move outward, exposing the mouth of the sampling bottle 4, so that the sampling bottle 4 is connected to the sampling unit 1 through the sampling channel. The reset unit drives the lifting rod 25 to move inward, so that the lifting rod 25 is reset.

[0053] In one embodiment of the present application, a first valve is provided at one end of the sampling channel near the delivery pipe 6, and an end plate 21 is provided at the other end of the sampling channel away from the delivery pipe 6. A lifting rod 25 is capable of reciprocating in the sampling channel. The second driving unit is a pull rod 23, which is provided through the end plate 21. A handle is provided at the end of the pull rod 23 outside the sampling channel. The end of the pull rod 23 inside the sampling channel is connected to the lifting rod 25, and the pull rod 23 can push and pull the lifting rod 25 to move reciprocally. A base plate 21 and a pusher head 26 are provided at opposite ends of the lifting rod 25, respectively. The pull rod 23 is connected to the base plate 21. The reset unit is a reset spring 22, which is sleeved on the pull rod 23. The opposite ends of the reset spring abut against the end plate 24 and the base plate 21, respectively. The pusher head 26 is arranged in contact with the inner wall of the sampling channel, thereby blocking the sampling channel and preventing the sampling bottle 4 from communicating with the sampling unit 1 through the sampling channel.

[0054] To prevent sample retention in the sampling channel, a scraper 27 is optionally provided at the free end of the lifting rod 25. As the lifting rod 25 moves, it drives the scraper 27, which scrapes the inner wall of the sampling channel. Using this lifting rod 25 significantly reduces the risk of clogging and improves long-term stability.

[0055] Optionally, the sampling bottle 4 includes an inner bottle body 41 and an outer bottle body 42 that is at least partially positioned outside the inner bottle body 41. The inner bottle body 41 is connected to the sampling channel, and the outer bottle body 42 is removably connected to the inner bottle body 41. The inner bottle body 41 is threadedly connected to the sampling channel for easy assembly and disassembly. The removable connection between the outer bottle body 42 and the inner bottle body 41 allows for flexible volume adjustment to meet different sampling requirements.

[0056] In one embodiment of the present application, the inner bottle body 41 and the outer bottle body 42 are connected by threads, which facilitates quick disassembly and assembly, thereby improving sampling efficiency. The volume of the inner bottle body 41 is fixed, an internal thread is provided at the bottle mouth, and a slide is provided at the bottom of the bottle. The outer bottle body 42 is made of a transparent material, and a scale line is provided on the outer bottle body 42 to display the volume of the sampling bottle 4. A limiting ring is provided at the top of the outer bottle body 42, and the limiting ring improves the connection stability between the inner bottle body 41 and the outer bottle body 42. A necking structure is provided at the bottom of the outer bottle body 42, and the necking structure prevents the outer bottle body 42 from falling off. A sliding isolation layer is provided inside the outer bottle body 42 for use in conjunction with the slide. The total volume of the inner bottle is adjusted by cooperating with the slide through the sliding isolation layer, so that the volume can be flexibly adjusted to meet different sampling volume requirements.

[0057] The following further introduces the use of the sampling device.

[0058] The sampling device has three use states: the first use state is standby state, the second use state is sampling state, and the third use state is cleaning state. The delivery pipe 6 is provided with a sampling port and a cleaning port, the sampling port is connected to a drive assembly, and the cleaning port is connected to a dust storage box 3.

[0059] When the sampling device is in standby state, the first valve of the sampling channel and the second valve of the dust storage box 3 are both closed, and the sealing spring pushes the lifting plate to seal the annular sealing groove; the sampling component 2 is in a closed state, and the dust storage box 3 is in a closed state; the first driving unit drives the sampling unit 1 to maintain a horizontal state, that is, the axis of the sampling tube and the axis of the conveying pipe 6 are parallel to each other, and the powder flows normally.

[0060] When the sampling device is in the sampling state, the second valve of the dust storage box 3 is closed, and the dust storage box 3 is in the closed state. The first drive unit drives the sampling unit 1 to rotate clockwise, allowing the left end of the sampling unit 1 to cut into the center of the conveying pipe 6. The right end of the sampling unit 1 is abutted against the annular sealing groove via the elastic sealing strip 10. The elastic sealing strip 10 pushes the lifting plate downward, squeezing the sealing spring to deform, and the lifting plate moves to fit into the annular sealing groove and seal. The first valve of the sampling channel is opened, pulling the pull rod 23, driving the lifting rod 25 outward, until the sampling bottle 4 is connected to the sampling unit 1 through the sampling channel. The powder in the center of the conveying pipe 6 enters the sampling unit 1 from the left end. The sample collected by the sampling unit 1 enters the sampling channel from the right end through the sampling port, and then enters the sampling bottle 4 through the sampling channel, completing the sampling process. After sampling, the pull rod 23 is released, and the return spring 22 pushes the lifting rod 25 back to its original position. The push head 26 of the lifting rod 25 drives the scraper 29 to scrape the inner wall of the sampling channel. At the same time, the first valve closes. The first driving unit drives the sampling unit 1 to restore to a horizontal state.

[0061] When the sampling device is in the cleaning state, the first valve of the sampling channel is closed, and the sampling assembly 2 is in the closed state. The first drive unit drives the sampling unit 1 counterclockwise, allowing the right end of the sampling unit 1 to penetrate the center of the conveying pipe 6. The left end of the sampling unit 1 abuts against the annular sealing groove via the elastic sealing strip 10. The elastic sealing strip 10 pushes the lifting plate downward, compressing the sealing spring, causing the lifting plate to move and seal the annular sealing groove. The second valve of the dust storage box 3 opens, connecting the dust storage box 3 to the sampling unit 1. The drive motor 7 rotates the horizontal shaft 122, which drives the vertical shaft 123 via bevel gears 124 and 125. The cams 126 on the horizontal and vertical shafts 122 and 123 alternately press against the inner pipe wall 101. Powder or impurities in the sampling unit 1 are released from the left end through the cleaning port and into the dust storage box 3, completing the cleaning process. The drive motor 7 is then deactivated. After cleaning is complete, the second valve closes. The first drive unit drives the sampling unit 1 back to its horizontal state. Observe the amount of residue in the dust storage box 3 through the viewing window 3124, and open the sealing door 3225 regularly to clean it.

[0062] The present application also provides a delivery system, comprising:

[0063] The delivery pipe 6 is provided with a sampling port;

[0064] As in the above-mentioned sampling device, the sampling unit 1 of the sampling device can be rotatably connected in the delivery pipe 6; the sampling channel of the sampling device is communicated with the sampling port.

[0065] A sampling port is provided on the conveying pipe 6; when the conveying pipe 6 is in the conveying state, the first valve is closed and the conveying pipe 6 is relatively closed; the first driving unit drives the sampling unit 1 to rotate until its axis is parallel to the axis of the conveying pipe 6, and the powder passes through the sampling unit 1 and continues to move in the conveying pipe 6; the sampling component 2 is in a closed state, that is, the sampling channel is not connected to the conveying pipe 6, and the sampling bottle 4 is not connected to the sampling channel.

[0066] When the conveying pipe 6 is in the sampling state during the conveying process, the first driving unit drives the sampling unit 1 to rotate clockwise until the right end of the sampling unit 1 abuts against the sampling port of the conveying pipe 6. The first valve controls the sampling channel to open, so that the sampling unit 1 and the sampling channel are connected through the sampling port, and the left end of the sampling unit 1 can cut into the center of the conveying pipe 6; at the same time, the driving component is started, so that the sampling bottle 4 and the sampling channel are connected; at this time, the powder in the center of the conveying pipe 6 enters the sampling unit 1 from the left end, and the sample obtained by the sampling unit 1 enters the sampling channel from the right end through the sampling port, and then enters the sampling bottle 4 through the sampling channel, completing the sampling and sampling work.

[0067] In order to reduce the driving difficulty and facilitate the rapid movement of the powder to the sampling bottle 4, optionally, when the sampling unit 1 is connected to the sampling channel through the sampling port, the axes of the sampling unit 1 and the sampling channel coincide or are parallel.

[0068] As can be seen from the above description and practice, the sampling device and conveying system provided by this application have the following advantages over the prior art: the sampling device can switch back and forth between the conveying state and the sampling state. In the conveying state, it can avoid increasing the resistance of the conveying pipeline and ensure the normal conveying of the powder. In the sampling state, the sampling unit can intercept the powder flow in the center of the pipeline, ensuring representative sampling, and can truly reflect the actual distribution state of the powder in the conveying pipeline, thereby ensuring the reliability of the sample.

[0069] Those skilled in the art should understand that the above description is only a specific embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the scope of the present application should be included in the scope of protection of the present application.

Claims

1. A sampling device, characterized in that: include: A sampling assembly, comprising a sampling unit and a first driving unit, wherein the first driving unit is used to drive the sampling unit to rotate in the delivery pipe; A sampling assembly, comprising a sampling bottle, a sampling channel, and a drive assembly, wherein the sampling bottle is connected to the sampling channel, and a first valve is provided on the sampling channel; the drive assembly is used to control the on-off of the sampling bottle and the sampling channel; When the first driving unit drives one end of the sampling unit to connect with the sampling channel, the other end of the sampling unit can cut into the center of the conveying pipe for sampling. The driving component controls the sampling bottle to connect with the sampling unit through the sampling channel, and the sample enters the sampling bottle through the sampling channel from the sampling unit and is stored in the sampling bottle.

2. The sampling device according to claim 1, characterized in that: The sampling assembly also includes: a cleaning unit and a dust storage box, the cleaning unit is used to clean the sampling unit; a second valve is provided on the dust storage box; when the first driving unit drives the sampling unit to connect with the dust storage box, powder or impurities enter the dust storage box from the sampling unit.

3. The sampling device according to claim 2, characterized in that: The sampling unit includes a sampling tube, which includes an inner tube wall and an outer tube wall arranged concentrically, and the inner tube wall can be connected to the sampling channel or the dust storage box; the cleaning unit is arranged in the annular gap between the inner tube wall and the outer tube wall, and can provide vibration to the inner tube wall.

4. The sampling device according to claim 3, characterized in that: The cleaning unit is at least one group of vibration components, which include at least one vibration shaft, multiple cams and a vibration motor. The cam is mounted on the vibration shaft and contacts the inner tube wall. The vibration motor is used to drive the vibration shaft to drive the cam to vibrate and transmit it to the inner tube wall.

5. The sampling device according to any one of claims 1 to 4, characterized in that: The first driving unit includes a driving motor, a rotating shaft and a sealing member. The driving motor is connected to the rotating shaft. A through hole is provided on the conveying pipeline. The free end of the rotating shaft passes through the through hole and is connected to the sampling unit. The sealing member is used to seal the through hole.

6. The sampling device according to any one of claims 1 to 4, characterized in that: The driving assembly includes a lifting rod, a second driving unit and a reset unit. The lifting rod can move back and forth along the sampling channel; the second driving unit drives the lifting rod to move toward the side away from the sampling unit, at least so that the sampling bottle is connected to the sampling unit through the sampling channel; the reset unit drives the lifting rod to reset.

7. The sampling device according to claim 6, characterized in that: The free end of the lifting rod is provided with a scraper.

8. The sampling device according to any one of claims 1 to 4, characterized in that: The sampling bottle includes an inner bottle body and an outer bottle body at least partially sleeved on the outside of the inner bottle body. The inner bottle body is communicated with the sampling channel, and the outer bottle body is movably connected to the inner bottle body.

9. A conveying system, characterized in that: include: A delivery pipeline, wherein a sampling port is provided on the delivery pipeline; The sampling device according to any one of claims 1 to 8, wherein the sampling unit of the sampling device is rotatably connected to the conveying pipe; and the sampling channel of the sampling device is connected to the sampling port.

10. The conveying system according to claim 9, characterized in that include: When the sampling unit is connected to the sampling channel through the sampling port, the axes of the sampling unit and the sampling channel coincide with or are parallel.

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