Automatic spiral sampling device

Abstract

The utility model relates to the technical field of powder sampling, and discloses an automatic spiral sampling device which comprises a sampling barrel, a first power mechanism, a second power mechanism, a spiral mechanism and a controller, a material opening is formed in the bottom of the sampling barrel; the screw mechanism comprises a first bearing and a screw rod, an inner rotor of the first bearing is fixedly connected with one end of the screw rod, an outer ring of the first bearing is connected with the output end of the second power mechanism, and the first bearing is driven by the second power mechanism to move up and down; the screw rod is connected with the output end of the first power mechanism and is driven by the first power mechanism to rotate, and the other end of the screw rod extends into the sampling barrel and can penetrate through the material opening to take and discharge materials; the first power mechanism, the second power mechanism and the weighing mechanism are all in communication connection with the controller, the controller controls the actions of the first power mechanism and the second power mechanism according to the weight, the powder weighing automation is achieved, errors and measurement deviation caused by human factors are reduced, and accurate control over the powder weight is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder sampling, in particular to an automatic spiral sampling device. Background Art

[0002] When producing or testing, it is necessary to take out a specified weight of powder material from a container. In the laboratory, most of the time, people use a sampling spoon to take out the powder, put it on an electronic balance for weighing, and then fine-tune it to the specified weight through the sampling spoon. Manual sampling requires labor, increases labor costs, and human factors will affect the sampling results, resulting in low efficiency; in production, a certain amount of powder is transported out of the container through a spiral sampler. If too much is transported, it cannot be retrieved, and the sampling weight accuracy is not high, so the sampling weight cannot be accurately controlled. Summary of the Utility Model

[0003] In view of this, the utility model provides an automatic spiral sampling device to solve the problems that manual sampling requires labor, increases labor costs, human factors will affect the sampling results, resulting in low efficiency, and the sampling weight accuracy is not high, so the sampling weight cannot be accurately controlled.

[0004] The utility model provides an automatic spiral sampling device, which includes a sampling cylinder, a first power mechanism, a second power mechanism, a spiral mechanism and a controller; a material port is arranged at the bottom of the sampling cylinder; the spiral mechanism includes a first bearing and a screw rod. The inner rotor of the first bearing is fixedly connected with one end of the screw rod, and the outer ring of the first bearing is connected with the output end of the second power mechanism. The first bearing moves up and down under the drive of the second power mechanism; the screw rod is connected with the output end of the first power mechanism and rotates under the drive of the first power mechanism. The other end of the screw rod extends into the sampling cylinder and can extend out of the material port for taking and discharging materials through the material port; the first power mechanism, the second power mechanism and the weighing mechanism are all in communication connection with the controller, and the controller controls the actions of the first power mechanism and the second power mechanism according to the weighed weight.

[0005] Beneficial effects: The rotation of the screw rod can be realized through the first power mechanism, and the first bearing is driven by the second power mechanism to move up and down, thereby driving the screw rod to move up and down, realizing the up and down movement of the screw rod at the material port; the first power mechanism, the second power mechanism and the weighing mechanism are all in communication connection with the controller, and the controller controls the actions of the two power mechanisms according to the weighed weight, thereby realizing the automation of the whole process of powder weighing; when too much material is discharged from the material port of the sampling cylinder, the controller controls the second power mechanism to drive the screw rod to move down into the powder, and at the same time controls the first power mechanism to drive the screw rod to rotate in the reverse direction, so that the screw rod retrieves the excess powder, realizing the automation of powder weighing, reducing the errors and measurement deviations caused by human factors, and realizing the accurate control of the powder weight.

[0006] In an alternative embodiment, a first transmission mechanism is further included. The first transmission mechanism includes a first transmission gear, a second transmission gear and a synchronous belt. The first transmission gear is installed on the output end of the first power mechanism. The second transmission gear is provided with a first through hole. The screw rod includes a connecting section and a spiral section connected in sequence. The connecting section has a non-circular structure. The shape of the first through hole matches that of the connecting section. One end of the connecting section is fixedly connected to the inner rotor of the first bearing, and the other end slides through the first through hole. The synchronous belt is sleeved on the outer circumferences of the first transmission gear and the second transmission gear.

[0007] Advantageous effects: By providing a first through hole in the second transmission gear and a connecting section on the screw rod that cooperates with the first through hole, since the connecting section has a non-circular structure, after the connecting section and the first through hole cooperate, they cannot rotate relative to each other, but can achieve relative sliding. When the output end of the first power mechanism drives the first transmission gear to rotate, and the first transmission gear drives the second transmission gear to rotate through the synchronous belt, with the cooperation of the first through hole and the connecting section, the second transmission gear can drive the screw rod to rotate synchronously, thereby realizing the output end of the first power mechanism driving the screw rod to rotate. Moreover, the transmission efficiency of the first transmission gear, the second transmission gear and the synchronous belt is high, the work is reliable, and the service life is long.

[0008] In an alternative embodiment, a fixed bracket is further included. The top of the sampling cylinder is fixed below the fixed bracket. The first transmission mechanism further includes a transmission bracket which is fixed on the fixed bracket. The transmission bracket is provided with a strip-shaped hole. The body of the first power mechanism is connected to the strip-shaped hole and has a first position close to the second transmission gear to loosen the synchronous belt and a second position far from the second transmission gear to tension the synchronous belt.

[0009] Advantageous effects: By providing a strip-shaped hole in the transmission bracket, when the body of the first power mechanism is fixed at one end of the strip-shaped hole close to the second transmission gear, the distance between the first transmission gear and the second transmission gear is reduced, which is convenient for the installation or disassembly of the synchronous belt. When the body of the first power mechanism is fixed at the other end of the strip-shaped hole far from the second transmission gear, the distance between the first transmission gear and the second transmission gear is increased, which is convenient for tightening the synchronous belt, so that the synchronous belt can drive the second transmission gear to rotate synchronously under the drive of the first transmission gear.

[0010] In an alternative embodiment, the screw mechanism further includes a second bearing located between the fixed bracket and the second transmission gear. The outer ring of the second bearing is fixedly connected to the fixed bracket and the second transmission gear respectively. The inner rotor of the second bearing is provided with a second through hole, and the shape of the second through hole matches that of the connecting section. The connecting section is slidably disposed within the second through hole.

[0011] Advantageous effects: By providing the second bearing, the screw can be fixed to the fixed bracket, making the screw more stable during rotation or vertical movement; by providing a second through hole on the inner ring of the second bearing and the shape of the second through hole matching that of the connecting section, when the screw rotates driven by the second transmission gear, the inner ring of the second bearing can be driven to rotate synchronously, realizing the rotational connection between the screw and the fixed bracket.

[0012] In an alternative embodiment, it further includes a sleeve. The top of the outer ring of the second bearing is provided with a first boss, and the bottom of the second transmission gear is provided with a second boss. The second boss is located above the first boss, and the sleeve is sleeved on the outer peripheries of the first boss and the second boss.

[0013] Advantageous effects: By sleeving a sleeve on the outer peripheries of the first boss and the second boss, it helps to stably connect the second transmission gear above the second bearing, realizes the stable rotation of the second transmission gear, and enhances the stability of the operation of the automatic screw sampling device.

[0014] In an alternative embodiment, it further includes a second transmission mechanism. The second transmission mechanism includes a lead screw and a moving structure; the bottom end of the lead screw is fixedly connected to the output end of the second power mechanism; the moving structure is disposed above the first transmission mechanism, with one end sleeved on the outer periphery of the lead screw and threadedly connected to the lead screw; the other end is fixedly connected to the outer ring of the first bearing.

[0015] Advantageous effects: By fixedly connecting the lead screw to the output end of the second power mechanism and threadedly connecting the moving structure to the lead screw, when the output end of the second power mechanism drives the lead screw to rotate, the moving structure slides up and down on the lead screw. Since the first bearing is fixedly connected to the moving structure, the screw is driven to move up and down under the drive of the first bearing. The operation is simple, and it has strong stability and high reliability.

[0016] In an alternative embodiment, the moving structure includes a lead screw nut and a moving plate; the lead screw nut is sleeved on the outer periphery of the lead screw and threadedly connected to the lead screw; one end of the moving plate is fixedly connected to the lead screw nut, and the other end is fixedly connected to the outer ring of the first bearing.

[0017] Beneficial effects: The up-and-down relative movement between the moving plate and the lead screw is achieved by setting the lead screw nut. Through the setting of the moving plate, the power at the output end of the second power mechanism can be transmitted to the first bearing, driving the first bearing to move up and down in the vertical direction, thereby driving the screw rod to move up and down in the vertical direction.

[0018] In an alternative embodiment, the screw mechanism further includes a sealing head, which is located at the material outlet of the sampling cylinder, connected to the bottom of the screw rod, and used to block the material outlet.

[0019] Beneficial effects: By setting the sealing head, it is possible to prevent powder from spilling out of the sampling cylinder during the movement of the automatic screw sampling device, and after the sampling cylinder has finished discharging materials, the material outlet can be blocked in time to prevent excess powder from spilling out and avoid affecting the weighing of the powder.

[0020] In an alternative embodiment, it further includes a microswitch, which is located above the moving structure, fixed on the fixed bracket, and communicatively connected to the second power mechanism; when the moving structure abuts against the microswitch, the sealing head blocks the material outlet.

[0021] Beneficial effects: By setting the microswitch, when the moving structure abuts against the microswitch, the sealing head blocks the material outlet. At this time, the microswitch transmits a signal to the second power mechanism, and the second power mechanism stops driving the lead screw to rotate further, preventing the screw rod from driving the sealing head to move upward continuously and avoiding squeezing and damaging the material outlet.

[0022] In an alternative embodiment, an air pipe joint is further provided above the sampling cylinder. The outlet of the air pipe joint is communicated with the inside of the sampling cylinder, and the inlet is used to connect to compressed air.

[0023] Beneficial effects: By setting the air pipe joint above the sampling cylinder, the inside of the screw rod and the sampling cylinder can be blown and cleaned, enabling the automatic screw sampling device to sample different types of powders and avoiding cross-contamination between different types of powders. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is the front view of an automatic screw sampling device according to an embodiment of the present invention;

[0026] Figure 2 The side view of an automatic spiral sampling device according to an embodiment of the present utility model;

[0027] Figure 3 The sectional view of the sampling cylinder and the spiral mechanism according to an embodiment of the present utility model.

[0028] Description of the reference numerals:

[0029] 1. Sampling cylinder; 11. Material inlet; 12. Air pipe joint; 2. First power mechanism; 3. Second power mechanism; 4. Spiral mechanism; 41. First bearing; 42. Screw; 421. Connection section; 422. Spiral section; 43. Second bearing; 44. Head; 5. First transmission mechanism; 51. First transmission gear; 52. Second transmission gear; 53. Synchronous belt; 54. Transmission bracket; 541. Strip-shaped hole; 6. Fixed bracket; 61. Avoidance hole; 62. Mounting post; 7. Sleeve; 8. Second transmission mechanism; 81. Lead screw; 82. Moving structure; 821. Lead screw nut; 822. Moving plate; 9. Microswitch. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] The following combines Figures 1 to 3 , and describes the embodiments of the present utility model.

[0032] According to an embodiment of the present utility model, an automatic spiral sampling device is provided, which includes a sampling cylinder 1, a first power mechanism 2, a second power mechanism 3, a spiral mechanism 4 and a controller; a material port 11 is provided at the bottom of the sampling cylinder 1; the spiral mechanism 4 includes a first bearing 41 and a screw rod 42, the inner rotor of the first bearing 41 is fixedly connected to one end of the screw rod 42, the outer ring of the first bearing 41 is connected to the output end of the second power mechanism 3, and the first bearing 41 moves up and down under the drive of the second power mechanism 3; the screw rod 42 is connected to the output end of the first power mechanism 2 and rotates under the drive of the first power mechanism 2, and the other end of the screw rod 42 extends into the sampling cylinder 1 and can extend out of the material port 11 for taking and discharging materials through the material port 11; the first power mechanism 2, the second power mechanism 3 and the weighing mechanism are all communicatively connected to the controller, and the controller controls the actions of the first power mechanism 2 and the second power mechanism 3 according to the weighed amount.

[0033] The rotation of the screw rod 42 can be realized through the first power mechanism 2, and the first bearing 41 is driven by the second power mechanism 3 to move up and down, thereby driving the screw rod 42 to move up and down, realizing the up and down movement of the screw rod 42 at the material port 11; the first power mechanism 2, the second power mechanism 3 and the weighing mechanism are all communicatively connected to the controller, and the controller controls the actions of the two power mechanisms according to the weighed amount, thereby realizing the automation of the whole process of powder weighing; when too much material is discharged from the material port 11 of the sampling cylinder 1, the controller controls the second power mechanism 3 to drive the screw rod 42 to move down into the powder, and at the same time controls the first power mechanism 2 to drive the screw rod 42 to rotate in the reverse direction, so that the screw rod 42 retrieves the excess powder, realizing the automation of powder weighing, reducing the errors and measurement deviations caused by human factors, and realizing the precise control of the powder weight.

[0034] Specifically, the first power mechanism 2, the second power mechanism 3 and the weighing device are all communicatively connected through the controller, and the weighing device transmits the signal of the weighed powder weight to the controller, and the controller controls the rotation speeds of the first power mechanism 2 and the second power mechanism 3, thereby realizing the control of the rotation and up and down movement of the screw rod 42.

[0035] In one embodiment, it further includes a first transmission mechanism 5, and the first transmission mechanism 5 includes a first transmission gear 51, a second transmission gear 52 and a synchronous belt 53; the first transmission gear 51 is installed on the output end of the first power mechanism 2; the second transmission gear 52 is provided with a first through hole, and the screw rod 42 includes a connecting section 421 and a spiral section 422 which are connected in sequence; the connecting section 421 is a non-circular structure, the shape of the first through hole matches that of the connecting section 421, and one end of the connecting section 421 is fixedly connected to the inner rotor of the first bearing 41, and the other end slides through the first through hole; the synchronous belt 53 is sleeved on the outer circumferences of the first transmission gear 51 and the second transmission gear 52.

[0036] By providing a first through hole on the second transmission gear 52 and a connecting section 421 on the screw rod 42 that cooperates with the first through hole, since the connecting section 421 is a non-circular structure, after the connecting section 421 and the first through hole are matched, they cannot rotate relative to each other, but can achieve relative sliding. When the output end of the first power mechanism 2 drives the first transmission gear 51 to rotate, and the first transmission gear 51 drives the second transmission gear 52 to rotate through the synchronous belt 53, with the cooperation of the first through hole and the connecting section 421, the second transmission gear 52 can drive the screw rod 42 to rotate synchronously, so as to realize the output end of the first power mechanism 2 driving the screw rod 42 to rotate. Moreover, the transmission efficiency of the first transmission gear 51, the second transmission gear 52 and the synchronous belt 53 is high, the work is reliable, and the service life is long.

[0037] In another alternative embodiment, the first power mechanism 2 can be arranged on the first bearing 41 and move synchronously with the first bearing 41, so that the first power mechanism 2 can directly drive the screw rod 42 to rotate without setting the connecting section 421 of the screw rod 42 as a non-circular structure.

[0038] In one embodiment, it further includes a fixed bracket 6, the top of the sampling cylinder 1 is fixed below the fixed bracket 6; the first transmission mechanism 5 further includes a transmission bracket 54, the transmission bracket 54 is fixed on the fixed bracket 6, and the transmission bracket 54 is provided with a strip-shaped hole 541; the body of the first power mechanism 2 is connected to the strip-shaped hole 541, and has a first position close to the second transmission gear 52 to loosen the synchronous belt 53 and a second position away from the second transmission gear 52 to tension the synchronous belt 53.

[0039] By providing a strip-shaped hole 541 on the transmission support 54, when the body of the first power mechanism 2 is fixed at one end of the strip-shaped hole 541 close to the second transmission gear 52, the distance between the first transmission gear 51 and the second transmission gear 52 is reduced, facilitating the installation or disassembly of the synchronous belt 53; when the body of the first power mechanism 2 is fixed at the end of the strip-shaped hole 541 away from the second transmission gear 52, the distance between the first transmission gear 51 and the second transmission gear 52 is increased, facilitating the tensioning of the synchronous belt 53, so that the synchronous belt 53 drives the second transmission gear 52 to rotate synchronously under the drive of the first transmission gear 51.

[0040] Specifically, the fixing bracket 6 is used to be installed on the equipment bracket, and the fixing bracket 6 is provided with mounting holes, and the top of the sampling cylinder 1 communicates with the mounting holes.

[0041] In a specific embodiment, the transmission support 54 is provided with a through hole, the top end of the body of the first power mechanism 2 is fixedly connected to the transmission support 54, and the output end passes through the through hole and is connected to the first transmission gear 51.

[0042] Specifically, the fixing bracket 6 is provided with an avoidance hole 61, a part of the body of the first power mechanism 2 is located in the avoidance hole 61, making the structure of the automatic spiral sampling device more compact, reducing the space occupation, and there is a gap between the avoidance hole 61 and the body of the first power mechanism 2, which can prevent the body of the first power mechanism 2 from interfering with the fixing bracket 6 when moving on the strip-shaped hole 541.

[0043] Specifically, the first power mechanism 2 is a stepping motor.

[0044] Specifically, the fixing bracket 6 is provided with four mounting posts 62, the four mounting posts 62 are arranged around the outer periphery of the second power mechanism 3, and the second power mechanism 3 is fixedly connected to all the four mounting posts 62.

[0045] In an embodiment, the spiral mechanism 4 further includes a second bearing 43, the second bearing 43 is located between the fixing bracket 6 and the second transmission gear 52, the outer ring of the second bearing 43 is fixedly connected to the fixing bracket 6 and the second transmission gear 52 respectively, the inner rotor of the second bearing 43 is provided with a second through hole, and the shape of the second through hole matches that of the connecting section 421, and the connecting section 421 is slidably arranged in the second through hole.

[0046] By providing the second bearing 43, the screw rod 42 can be fixed to the fixed bracket 6, making the screw rod 42 more stable during rotation or vertical movement; by providing a second through hole on the inner ring of the second bearing 43, and the shape of the second through hole matching that of the connecting section 421, when the screw rod 42 rotates driven by the second transmission gear 52, the inner ring of the second bearing 43 can be driven to rotate synchronously, realizing the rotational connection between the screw rod 42 and the fixed bracket 6.

[0047] In a specific embodiment, the first through hole and the second through hole can be polygonal holes, and the connecting section 421 can be correspondingly provided as a prism. For example, the first through hole and the second through hole are hexagonal holes, and the connecting section 421 is a hexagonal prism; or the first through hole and the second through hole are triangular holes, and the connecting section 421 is a triangular prism; or the first through hole and the second through hole are rectangular holes, and the connecting section 421 is a quadrangular prism, etc.

[0048] In an alternative embodiment, it can also be that limiting grooves are provided on both the first through hole and the second through hole, and a first limiting block protrudes on the connecting section 421. After the connecting section 421 passes through the first through hole and the second through hole, the first limiting block is respectively clamped and matched with the two limiting grooves, realizing the synchronous rotation of the second transmission gear 52, the screw rod 42, and the inner ring of the second bearing 43; specifically, the length of the first limiting block is equal to that of the connecting section 421, realizing the vertical sliding of the screw rod 42 on the second transmission gear 52 and the second bearing 43.

[0049] In an alternative embodiment, it can also be that a sliding groove is provided on the connecting section 421, the sliding groove is arranged on the outer side of the connecting section 421 in the vertical direction, and second limiting blocks protrude in both the first through hole and the second through hole. Both of the second limiting blocks are located in the sliding groove and are clamped and matched with the sliding groove, which can not only realize the synchronous rotation of the second transmission gear 52, the screw rod 42, and the inner ring of the second bearing 43, but also realize the vertical sliding of the screw rod 42 on the second transmission gear 52 and the second bearing 43.

[0050] In one embodiment, it further includes a sleeve 7. A first boss is provided at the top of the outer ring of the second bearing 43, and a second boss is provided at the bottom of the second transmission gear 52. The second boss is located above the first boss, and the sleeve 7 is sleeved on the outer periphery of the first boss and the second boss.

[0051] By sleeving the sleeve 7 on the outer periphery of the first boss and the second boss, it helps to stably connect the second transmission gear 52 above the second bearing 43, realizes the stable rotation of the second transmission gear 52, and enhances the stability of the operation of the automatic spiral sampling device.

[0052] In one embodiment, it further includes a second transmission mechanism 8, and the second transmission mechanism 8 includes a lead screw 81 and a moving structure 82; the bottom end of the lead screw 81 is fixedly connected to the output end of the second power mechanism 3; the moving structure 82 is arranged above the first transmission mechanism 5, one end is sleeved on the outer periphery of the lead screw 81 and is threadedly connected to the lead screw 81; the other end is fixedly connected to the outer ring of the first bearing 41.

[0053] By fixedly connecting the lead screw 81 to the output end of the second power mechanism 3 and threadedly connecting the moving structure 82 to the lead screw 81, when the output end of the second power mechanism 3 drives the lead screw 81 to rotate, the moving structure 82 slides up and down on the lead screw 81. Since the first bearing 41 is fixedly connected to the moving structure 82, the up and down movement of the screw rod 42 is realized under the drive of the first bearing 41. The operation is simple, and the stability is strong and the reliability is high.

[0054] In one embodiment, the moving structure 82 includes a lead screw nut 821 and a moving plate 822; the lead screw nut 821 is sleeved on the outer periphery of the lead screw 81 and is threadedly connected to the lead screw 81; one end of the moving plate 822 is fixedly connected to the lead screw nut 821, and the other end is fixedly connected to the outer ring of the first bearing 41.

[0055] By providing the lead screw nut 821, the up and down relative movement between the moving plate 822 and the lead screw 81 is realized. Through the arrangement of the moving plate 822, the power of the output end of the second power mechanism 3 can be transmitted to the first bearing 41, driving the first bearing 41 to move up and down in the vertical direction, thereby realizing driving the screw rod 42 to move up and down in the vertical direction.

[0056] Specifically, the second power mechanism 3 is a stepper motor.

[0057] In an alternative implementation, the second power mechanism 3 can also be a push-pull cylinder. A push-pull plate is fixedly connected to the output end of the push-pull cylinder, and the outer ring of the first bearing 41 is fixedly connected to the push-pull plate. The screw rod 42 moves up and down under the drive of the push-pull plate.

[0058] In one embodiment, the screw mechanism 4 further includes a head 44. The head 44 is located at the material opening 11 of the sampling cylinder 1 and is connected to the bottom of the screw rod 42 for blocking the material opening 11.

[0059] By providing the head 44, it can prevent the powder from spilling out of the sampling cylinder 1 during the movement of the automatic screw sampling device, and can timely block the material opening 11 after the sampling cylinder 1 finishes discharging, preventing the excess powder from spilling out and avoiding affecting the weighing of the powder.

[0060] In one embodiment, it further includes a microswitch 9. The microswitch 9 is located above the moving structure 82, fixed on the fixed bracket 6, and communicatively connected to the second power mechanism 3. When the moving structure 82 abuts against the microswitch 9, the head 44 seals the material port 11.

[0061] By providing the microswitch 9, when the moving structure 82 abuts against the microswitch 9, the head 44 seals the material port 11. At this time, the microswitch 9 transmits a signal to the second power mechanism 3, and the second power mechanism 3 stops driving the lead screw 81 to continue rotating, preventing the screw 42 from continuing to drive the head 44 to move upward and avoiding extrusion damage to the material port 11.

[0062] In one embodiment, an air pipe joint 12 is further provided above the sampling cylinder 1. The outlet of the air pipe joint 12 communicates with the inside of the sampling cylinder 1, and the inlet is used to connect to compressed air.

[0063] By providing the air pipe joint 12 above the sampling cylinder 1, the screw 42 and the inside of the sampling cylinder 1 can be blown and cleaned, enabling the automatic spiral sampling device to sample different types of powders and avoiding cross-contamination between different types of powders.

[0064] In a specific embodiment, there are four air pipe joints 12, and the four air pipe joints 12 are arranged around the circumference of the sampling cylinder 1, which can achieve a full-range cleaning of the screw 42 and the inside of the sampling cylinder 1.

[0065] In a specific embodiment, the automatic spiral sampling device is fixed on a movable truss. When taking materials, the movable truss drives the automatic spiral sampling device to move above the powder. The second power mechanism 3 drives the screw 42 to move downward into the powder, and then the first power mechanism 2 drives the screw 42 to rotate forward, and the second power mechanism 3 drives the screw 42 to move upward, which can bring the powder into the sampling cylinder 1. Then the movable truss drives the automatic spiral sampling device to move above the weighing device. The first power mechanism 2 drives the screw 42 to rotate in reverse, and the second power mechanism 3 drives the screw 42 to move downward, and the powder falls onto the weighing device. If too much powder is taken out, the second power mechanism 3 drives the screw 42 to move downward into the powder, and then the first power mechanism 2 drives the screw 42 to rotate forward, and the second power mechanism 3 drives the screw 42 to move upward, driving part of the powder back into the sampling cylinder 1 until the powder reaches the required weight. Specifically, the excess powder is retrieved by the screw 42 and continues to be stored in the sampling cylinder 1 and can be used again. Compared with manually retrieving the excess powder, it reduces the manual contact with the powder, avoids contaminating the powder, and reduces the waste of powder.

[0066] Although embodiments of the present utility model have been described with reference to the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. An automatic spiral sampling device, characterized in that, Comprising: A sampling cylinder (1) with a material outlet (11) provided at the bottom; A first power mechanism (2) and a second power mechanism (3); A screw mechanism (4), including a first bearing (41) and a screw (42). The inner rotor of the first bearing (41) is fixedly connected to one end of the screw (42), and the outer ring of the first bearing (41) is connected to the output end of the second power mechanism (3). The first bearing (41) moves up and down under the drive of the second power mechanism (3). The screw (42) is connected to the output end of the first power mechanism (2) and rotates under the drive of the first power mechanism (2). The other end of the screw (42) extends into the sampling cylinder (1) and can extend out of the material outlet (11) for taking and discharging materials through the material outlet (11); A controller. The first power mechanism (2), the second power mechanism (3), and the weighing mechanism are all communicatively connected to the controller. The controller controls the actions of the first power mechanism (2) and the second power mechanism (3) according to the weighed amount.

2. The automatic spiral sampling device according to claim 1, wherein It further includes a first transmission mechanism (5), and the first transmission mechanism (5) includes: A first transmission gear (51) installed on the output end of the first power mechanism (2); A second transmission gear (52) provided with a first through hole. The screw (42) includes a connecting section (421) and a spiral section (422) connected in sequence. The connecting section (421) has a non-circular structure, and the first through hole matches the shape of the connecting section (421). One end of the connecting section (421) is fixedly connected to the inner rotor of the first bearing (41), and the other end slides through the first through hole; A synchronous belt (53) sleeved on the outer circumferences of the first transmission gear (51) and the second transmission gear (52).

3. The automatic spiral sampling device according to claim 2, characterized in that, It further includes a fixed bracket (6). The top of the sampling cylinder (1) is fixed below the fixed bracket (6). The first transmission mechanism (5) further includes a transmission bracket (54). The transmission bracket (54) is fixed on the fixed bracket (6), and a strip-shaped hole (541) is provided on the transmission bracket (54). The body of the first power mechanism (2) is connected to the strip-shaped hole (541), having a first position close to the second transmission gear (52) to loosen the synchronous belt (53) and a second position away from the second transmission gear (52) to tension the synchronous belt (53).

4. The automatic spiral sampling device according to claim 3, wherein, The screw mechanism (4) further includes a second bearing (43). The second bearing (43) is located between the fixed bracket (6) and the second transmission gear (52). The outer ring of the second bearing (43) is fixedly connected to the fixed bracket (6) and the second transmission gear (52) respectively. The inner rotor of the second bearing (43) is provided with a second through hole, and the second through hole matches the shape of the connecting section (421). The connecting section (421) is slidably arranged in the second through hole.

5. The automatic spiral sampling device according to claim 4, characterized in that, It further includes a sleeve (7). A first boss is provided at the top of the outer ring of the second bearing (43), and a second boss is provided at the bottom of the second transmission gear (52). The second boss is located above the first boss, and the sleeve (7) is sleeved on the outer perimeters of the first boss and the second boss.

6. The automatic spiral sampling device according to any one of claims 3 to 5, characterized in that It further includes a second transmission mechanism (8), and the second transmission mechanism (8) includes: A lead screw (81) whose bottom end is fixedly connected to the output end of the second power mechanism (3); A moving structure (82) which is arranged above the first transmission mechanism (5), with one end sleeved on the outer perimeter of the lead screw (81) and threadedly connected to the lead screw (81); and the other end is fixedly connected to the outer ring of the first bearing (41).

7. The automatic spiral sampling device according to claim 6, wherein The moving structure (82) includes: A lead screw nut (821) which is sleeved on the outer perimeter of the lead screw (81) and threadedly connected to the lead screw (81); A moving plate (822) with one end fixedly connected to the lead screw nut (821) and the other end fixedly connected to the outer ring of the first bearing (41).

8. The automatic spiral sampling device according to claim 6, characterized in that, The screw mechanism (4) further includes a head (44) which is located at the material inlet (11) of the sampling cylinder (1), connected to the bottom of the screw (42), and used for blocking the material inlet (11).

9. The automatic spiral sampling device according to claim 8, characterized in that, It further includes a microswitch (9). The microswitch (9) is located above the moving structure (82), fixed on the fixed bracket (6), and communicatively connected to the second power mechanism (3); when the moving structure (82) abuts against the microswitch (9), the head (44) blocks the material inlet (11).

10. The automatic spiral sampling device according to any one of claims 1 to 3, 5, or 7 to 9, characterized in that An air pipe joint (12) is further provided above the sampling cylinder (1). The outlet of the air pipe joint (12) is communicated with the inside of the sampling cylinder (1), and the inlet is used for connecting compressed air.

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