A screw extruder characteristic testing equipment

Abstract

The present invention discloses a screw extruder characteristic testing device, which belongs to the field of spiral blade detection technology, including a detection platform and two semi-ring detection covers for detecting shaftless spiral blades, wherein the detection platform is fixedly connected with an angle controller through a mounting seat, and two docking electric control guide rails are fixedly connected to the top of the detection platform. The present invention can utilize the obstructed rotation of the inner semi-ring in the semi-ring detection cover to drive the wear-resistant sand surface of the arc detection capsule to continuously rub against the blade surface of the shaftless spiral blade, simulating the continuous grinding state of the shaftless spiral blade during use, and the arc detection capsule and the shaftless spiral blade are more in line with the actual use state of the shaftless spiral blade. By utilizing a hydraulic box and overflow valves with different hydraulic setting values, the hydraulic pressure received from the extrusion end to the input end of the shaftless spiral blade is gradually increased, so that the detection result is more in line with the use of the shaftless spiral blade.

Description

Technical Field

[0001] The invention relates to the technical field of spiral blade detection, in particular to a screw extruder characteristic testing device. Background Art

[0002] The shaftless screw conveyor is a type of machine for conveying items. Compared with the traditional shafted screw conveyor, it adopts a design without a central shaft and uses an integral steel screw with a certain degree of flexibility to push materials. It has the advantage of strong anti-winding properties and is suitable for conveying viscous and easily agglomerated materials.

[0003] When the shaftless screw conveyor is used to transport and extrude sludge, when the transported sludge is mixed with impurities, these impurities are easy to rub against the blades, cylinder and support plates, and the sludge will produce a certain stirring effect during the transportation process, resulting in the sludge accumulated on the blades to form scaling. Long-term accumulation will form hard nodules, causing friction between the blades and the cylinder, which will lead to a large degree of wear of the spiral blades during use. Therefore, there are usually high requirements for its wear resistance. In addition, during the process of conveying and extruding sludge by the shaftless screw conveyor, as the sludge is continuously transported to the extrusion end, it will be continuously compacted, so that the spiral blades in the shaftless screw conveyor are closer to the extrusion end. The greater the resistance in the extrusion direction, if the axial compressive strength of the spiral blades is insufficient, it is easy to be damaged during use, which affects the conveying and extrusion of the sludge. Therefore, a screw extruder characteristic testing device is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the spiral blades in the prior art are greatly worn during use, so there are usually high requirements for their wear resistance, and in the process of sludge being transported and extruded by a shaftless screw conveyor, as the sludge is continuously transported to the extrusion end, it will be continuously compacted, so that the closer the spiral blades in the shaftless screw conveyor are to the extrusion end, the greater the resistance in the extrusion direction they encounter. If the axial compressive strength of the spiral blades is insufficient, they are easily damaged during use, affecting the transport and extrusion work of the sludge. A screw extruder characteristic testing device is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A screw extruder characteristic testing device, comprising a testing platform for testing shaftless spiral blades and two semi-ring testing covers, wherein the testing platform is fixedly connected to an angle controller via a mounting seat, two docking electric control guide rails are fixedly connected to the top of the testing platform, the inner side wall of the docking electric control guide rails is connected to a retaining seat via a guide seat, the retaining seat is connected to the semi-ring testing cover located above via a semi-ring testing cover located below, and an inner measuring semi-ring is connected to the outer side wall of the semi-ring testing cover at one end away from the angle controller via a hydraulic component;

[0007] A plurality of arc-shaped grooves are provided on the inner wall of the semi-ring detection cover, and a fixed arc plate for connecting with the inner semi-ring is provided in the arc-shaped groove. The fixed arc plate is respectively connected to two arc-shaped piston rods through a limit assembly, and the two arc-shaped piston rods are commonly connected to a buffer damping assembly. The inner wall of the inner semi-ring is connected to a plurality of arc-shaped detection capsules through a plurality of overflow valves, and the side walls of the arc-shaped detection capsules are provided with a wear-resistant sand surface.

[0008] Preferably, a plurality of support seats are fixedly connected to the bottom end of the detection platform, the inner side wall of the docking electric control guide rail is slidably connected to the side wall of the guide seat, and the guide seat is fixedly connected to the outer side wall of the semi-ring detection cover located below through a retaining seat.

[0009] Preferably, the semi-ring detection cover located below is rotatably connected to the semi-ring detection cover located above via a hinge structure, and the semi-ring detection cover located below is fixedly connected to an electromagnetic positioning plate at one end close to the angle controller.

[0010] Preferably, the hydraulic assembly consists of a hydraulic box and a connecting hose, the side wall of the hydraulic box is fixedly connected to the outer wall of the half-ring detection cover away from the angle controller, and the hydraulic box is connected to the internal cavity of the inner half ring through the connecting hose.

[0011] Preferably, the limiting assembly consists of an adapter plate and a limiting arc plate, the outer side wall of the inner semi-ring is respectively fixedly connected to the inner arc side walls of multiple fixed arc plates, the outer arc side wall of the fixed arc plate is fixedly connected to the side wall of the limiting arc plate through the adapter plate, and the end of the limiting arc plate is fixedly connected to the arc piston rod.

[0012] Preferably, the buffer damping assembly is composed of two exchange fluid tanks and two throttling flow pipes, and the arc-shaped piston rod is slidably connected to the inner side wall of the exchange fluid tank located below through a piston plate.

[0013] Preferably, the exchange liquid tank located below is communicated with the exchange liquid tank located above through two throttling pipes, and the exchange liquid tank is fixedly connected to the inner side wall of the arc-shaped groove of the semi-ring detection cover.

[0014] Preferably, the inner cavity of the inner semi-ring is connected to the inner cavity of the arc-shaped detection capsule through an overflow valve, and the hydraulic setting values ​​of the plurality of overflow valves gradually increase from the end away from the angle controller to the end close to the angle controller.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Through the setting of buffer damping components and arc-shaped detection capsules, this scheme can utilize the obstructed rotation of the inner semi-ring in the semi-ring detection cover to drive the wear-resistant sand surface of the arc-shaped detection capsule to continuously rub against the blade surface of the shaftless spiral blade, simulating the continuous wear state of the shaftless spiral blade during use. The arc-shaped detection capsule and the shaftless spiral blade are also more in line with the actual use state of the shaftless spiral blade, making the detection result more accurate.

[0017] 2. This scheme, through the setting of hydraulic components and overflow valves, can utilize a hydraulic box and overflow valves with different hydraulic setting values ​​to gradually increase the hydraulic pressure from the extrusion end to the input end of the shaftless spiral blade, simulating the state in which the closer the position to the extrusion end is to the greater the resistance in the extrusion direction when the shaftless spiral blade is extruding sludge, so that the test results are more in line with the use of the shaftless spiral blade.

[0018] 3. This scheme can use the two semi-ring detection covers to cover the detection range of the shaftless spiral blade in an annular manner through the setting of two semi-ring detection covers, so as to facilitate the subsequent simulation detection of the characteristics of various parts of the shaftless spiral blade, making the detection more comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a screw extruder characteristic testing device proposed by the present invention;

[0020] Figure 2 An assembly diagram of a screw extruder characteristic testing device proposed by the present invention;

[0021] Figure 3 This is a structural schematic diagram of the connection between a guide seat and a docking electric control guide rail in a screw extruder characteristic testing device proposed by the present invention;

[0022] Figure 4 This is a structural schematic diagram of the position of the arc-shaped groove on the semi-ring detection cover in a screw extruder characteristic testing device proposed by the present invention;

[0023] Figure 5 for Figure 4 The enlarged view of point A in the middle;

[0024] Figure 6 This is a structural schematic diagram of a buffer damping component in a screw extruder characteristic testing device proposed by the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the connection between the inner half ring and a plurality of arc-shaped detection capsules in a screw extruder characteristic testing device proposed by the present invention;

[0026] Figure 8This is a structural schematic diagram of the position of the wear-resistant sand surface in a screw extruder characteristic testing device proposed by the present invention.

[0027] In the figure: 1. test table; 2. semi-ring test cover; 3. shaftless spiral blade; 4. angle controller; 5. docking electric control rail; 6. guide seat; 7. retaining seat; 8. hinge structure; 9. hydraulic box; 10. connecting hose; 11. inner semi-ring; 12. fixed arc plate; 13. adapter plate; 14. limit arc plate; 15. arc piston rod; 16. exchange liquid tank; 17. throttling flow pipe; 18. overflow valve; 19. arc test capsule; 20. wear-resistant sand surface; 21. electromagnetic positioning plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Example, see Figures 1 to 8, a screw extruder characteristic testing equipment, including a test platform 1 for detecting a shaftless spiral blade 3 and two semi-ring test covers 2, the test platform 1 is fixedly connected to an angle controller 4 through a mounting seat, two docking electric control guide rails 5 are fixedly connected to the top of the test platform 1, the inner side wall of the docking electric control guide rail 5 is connected to a retaining seat 7 through a guide seat 6, the retaining seat 7 is connected to the semi-ring test cover 2 located above through the semi-ring test cover 2 located below, and an inner test semi-ring 11 is connected to the outer side wall of the semi-ring test cover 2 away from the angle controller 4 through a hydraulic component;

[0032] Furthermore, a plurality of support seats are fixedly connected to the bottom end of the detection table 1, and the inner side wall of the docking electric control guide rail 5 is slidably connected to the side wall of the guide seat 6. The guide seat 6 is fixedly connected to the outer side wall of the semi-ring detection cover 2 located below through a retaining seat 7. The semi-ring detection cover 2 located below is rotatably connected to the semi-ring detection cover 2 located above through a hinge structure 8. The semi-ring detection cover 2 located below is fixedly connected to an electromagnetic positioning plate 21 at one end close to the angle controller 4. The hydraulic assembly consists of a hydraulic box 9 and a connecting hose 10. The side wall of the hydraulic box 9 is fixedly connected to the outer side wall of the semi-ring detection cover 2 away from the angle controller 4. The hydraulic box 9 is connected to the internal cavity of the inner semi-ring 11 through the connecting hose 10.

[0033] It should be noted that: the shaftless spiral blade 3 to be detected is placed in the semi-ring detection cover 2 located below, and the arc-shaped detection capsule 19 is adapted to be inserted into the blade gap of the shaftless spiral blade 3. After the shaftless spiral blade 3 is placed, the electromagnetic positioning plate 21 is energized to magnetically limit the output end of the shaftless spiral blade 3, so that the circular plate at the output end of the shaftless spiral blade 3 is sucked against the electromagnetic positioning plate 21 for easy positioning and placement, and then the semi-ring detection cover 2 located above is rotated downward through the hinge structure 8 to achieve the merging of the two semi-ring detection covers 2, and then the docking electric control guide rail 5 is started to drive the guide seat 6 to move, and the two semi-ring detection covers 2 are moved toward one end of the angle controller 4, and then the output end of the angle controller 4 and the shaft end of the shaftless spiral blade 3 are installed. The installation method is the existing technology and will not be described in detail here. Thereafter, the power supply of the electromagnetic positioning plate 21 is disconnected to ensure that the shaftless spiral blade 3 can be deflected within a certain range under the drive of the angle controller 4.

[0034] Based on the above advantages, the two half-ring detection covers 2 can be used to cover the detection range of the shaftless spiral blade 3 in an annular manner, which is convenient for subsequent simulation detection of the characteristics of various parts of the blade in the shaftless spiral blade 3, making the detection more comprehensive;

[0035] A plurality of arc-shaped grooves are provided on the inner wall of the semi-ring detection cover 2, and a fixed arc plate 12 for connecting with the inner semi-ring 11 is provided in the arc-shaped groove, and the fixed arc plate 12 is respectively connected to two arc-shaped piston rods 15 through a limit assembly, and the two arc-shaped piston rods 15 are commonly connected to a buffer damping assembly, and a plurality of arc-shaped detection capsules 19 are connected to the inner wall of the inner semi-ring 11 through a plurality of overflow valves 18, and a wear-resistant sand surface 20 is provided on the side wall of the arc-shaped detection capsule 19;

[0036] Furthermore, the limiting assembly is composed of an adapter plate 13 and a limiting arc plate 14, the outer side walls of the inner semi-ring 11 are respectively fixedly connected to the inner arc side walls of multiple fixed arc plates 12, the outer arc side walls of the fixed arc plates 12 are fixedly connected to the side walls of the limiting arc plates 14 through the adapter plate 13, the end of the limiting arc plate 14 is fixedly connected to the arc piston rod 15, the buffer damping assembly is composed of two exchange liquid tanks 16 and two throttling pipes 17, the arc piston rod 15 is slidably connected to the inner side wall of the exchange liquid tank 16 located below through the piston plate, the exchange liquid tank 16 located below is connected to the exchange liquid tank 16 located above through two throttling pipes 17, the exchange liquid tank 16 is fixedly connected to the inner side wall of the arc groove of the semi-ring detection cover 2, the internal cavity of the inner semi-ring 11 is connected to the internal cavity of the arc detection capsule 19 through the overflow valve 18, and the hydraulic setting value of the multiple overflow valves 18 gradually increases from the end away from the angle controller 4 to the end close to the angle controller 4;

[0037] The hydraulic box 9 is provided with a hydraulic pump body for conveying the liquid in the hydraulic box 9, and the exchange liquid tank 16 is provided with hydraulic oil for buffering and damping;

[0038] It should be noted that: when performing the detection, the angle controller 4 is started to drive the shaftless spiral blade 3 to deflect back and forth within the set angle range. When the shaftless spiral blade 3 rotates, it will squeeze and drive the arc-shaped detection capsule 19 in the blade gap to deflect, and then drive the inner semi-ring 11 to rotate through the arc-shaped detection capsule 19 (the arc-shaped detection capsule 19 is in flexible contact with the shaftless spiral blade 3, and the deflection within the set angle range will convert the forward pushing force of the shaftless spiral blade 3 into a pressure on the elastic deformation of the arc-shaped detection capsule 19, so that the positive pressure on the side of the conveying direction of the shaftless spiral blade 3 and the wear-resistant sand surface 20 on the arc-shaped detection capsule 19 increases, thereby making the friction force of the subsequent simulated detection on this side larger, which is more in line with the actual use scenario of the shaftless spiral blade 3, and the rotation of the shaftless spiral blade 3 is converted into the inner semi-ring 11 The rotation between the measuring semi-ring 11 and the semi-ring detection cover 2) will be driven by the rotation of the inner measuring semi-ring 11 to rotate the multiple fixed arc plates 12, thereby driving the multiple limit arc plates 14 to slide in the arc-shaped groove on the inner wall of the semi-ring detection cover 2. The sliding of the arc surface of the limit arc plate 14 will drive the piston plate to compress the hydraulic oil in the lower exchange liquid tank 16 through the arc piston rod 15. After the hydraulic oil in the lower exchange liquid tank 16 is pressurized, it will be pressed into the upper exchange liquid tank 16 through the throttling pipe 17. At the same time, the arc piston rod 15 on the other side will drive the piston plate to slide down, so that the space in the lower exchange liquid tank 16 on the other side increases and creates negative pressure. Then, the hydraulic oil in the upper exchange liquid tank 16 on the other side will be pressed into the lower exchange liquid tank 16 under the influence of its own gravity and negative pressure. Figure 6As shown in the figure, compared with the upper and lower exchange fluid tanks 16, the throttling flow pipe 17 between the two has a narrower flow path), so that the flow of hydraulic oil in the throttling flow pipe 17 is blocked, that is, a resistance is given to the limiting arc plate 14 sliding in this direction, which is converted into a rotation obstruction of the inner semi-ring 11 in the semi-ring detection cover 2, so that the rotation of the inner semi-ring 11 and the shaftless spiral blade 3 is not synchronized, and the arc detection capsule 19 fixedly connected to the inner wall of the inner semi-ring 11 is also not synchronized with the deflection of the shaftless spiral blade 3, thereby causing the arc detection capsule 19 on the inner wall of the inner semi-ring 11 and the shaftless spiral blade 3 in flexible contact to slide relative to each other within a certain range, so that the wear-resistant sand surface 20 of the arc detection capsule 19 is not in a synchronous manner on the blade surface of the shaftless spiral blade 3. The friction of reciprocating is interrupted. During the above-mentioned whole simulation process, the shaftless spiral blade 3 initially drives the inner half ring 11 to rotate in the half ring detection cover 2 through the arc detection capsule 19, which is equivalent to the static friction state. As the deflection angle of the rotating shaftless spiral blade 3 increases, the arc detection capsule 19 drives the inner half ring 11 to rotate in the half ring detection cover 2 and the resistance also gradually increases. At this time, relative slip occurs between the shaftless spiral blade 3 and the arc detection capsule 19, which is the sliding friction simulation state. When the maximum resistance state of the buffer damping component is finally reached, the friction force between the shaftless spiral blade 3 and the arc detection capsule 19 also reaches the maximum state, thereby simulating the friction force of the shaftless spiral blade 3 in different states encountered during use, making the whole simulation detection more comprehensive.

[0039] In this way, the obstructed rotation of the inner semi-ring 11 in the semi-ring detection cover 2 can be used to drive the wear-resistant sand surface 20 of the arc detection capsule 19 to continuously rub against the blade surface of the shaftless spiral blade 3, simulating the continuous wear state of the shaftless spiral blade 3 during use. The arc detection capsule 19 and the shaftless spiral blade 3 are also more in line with the actual use state of the shaftless spiral blade 3, making the detection result more accurate;

[0040] Then, the angle controller 4 is closed, and the hydraulic pump body in the hydraulic box 9 is started to continuously press the liquid into the inner semi-ring 11 through the connecting hose 10, and the hydraulic pressure in the inner semi-ring 11 will continue to increase. Since the hydraulic pressure setting value of the overflow valve 18 closest to the extrusion end of the shaftless spiral blade 3 is the smallest, it will be opened first, and the hydraulic pressure in the arc detection capsule 19 close to the extrusion end of the shaftless spiral blade 3 will increase first, and gradually begin to increase toward the input end of the shaftless spiral blade 3;

[0041] The above benefits are as follows: in this way, the hydraulic box 9 and the relief valve 18 with different hydraulic setting values ​​can be used to gradually increase the hydraulic pressure from the extrusion end to the input end of the shaftless spiral blade 3, simulating the state in which the closer the position to the extrusion end is to the greater the resistance in the extrusion direction when the shaftless spiral blade 3 is extruding the sludge, so that the detection result is more in line with the use of the shaftless spiral blade 3;

[0042] When the present invention is in use, the shaftless spiral blade 3 to be detected is placed in the semi-ring detection cover 2 located below, and the arc-shaped detection capsule 19 is adapted to be inserted into the blade gap of the shaftless spiral blade 3. After the shaftless spiral blade 3 is placed, the electromagnetic positioning plate 21 is energized to magnetically limit the output end of the shaftless spiral blade 3, so that the circular plate at the output end of the shaftless spiral blade 3 is sucked against the electromagnetic positioning plate 21 for easy positioning and placement. Then, the semi-ring detection cover 2 located above is rotated downward through the hinge structure 8 to achieve the merging of the two semi-ring detection covers 2, and then the detection cover 2 is started. The electric control guide rail 5 is connected to drive the guide seat 6 to move, and the two semi-ring detection covers 2 are moved toward one end of the angle controller 4, and then the output end of the angle controller 4 and the shaft end of the shaftless spiral blade 3 are installed. After that, the power supply of the electromagnetic positioning plate 21 is disconnected to ensure that the shaftless spiral blade 3 can be deflected within a certain range of angle under the drive of the angle controller 4. In this way, the two semi-ring detection covers 2 can be used to cover the detection range of the shaftless spiral blade 3 in an annular manner, which is convenient for the subsequent simulation detection of the characteristics of each part of the blade in the shaftless spiral blade 3, making the detection more comprehensive;

[0043] When performing detection, the angle controller 4 is started to drive the shaftless spiral blade 3 to deflect back and forth within the set angle range. When the shaftless spiral blade 3 rotates, it will squeeze and drive the arc-shaped detection capsule 19 in the blade gap to deflect, and then drive the inner semi-ring 11 to rotate through the arc-shaped detection capsule 19 (the arc-shaped detection capsule 19 is in flexible contact with the shaftless spiral blade 3, and the deflection within the set angle range will convert the forward pushing force of the shaftless spiral blade 3 into a pressure on the elastic deformation of the arc-shaped detection capsule 19, so that the positive pressure on the side of the conveying direction of the shaftless spiral blade 3 and the wear-resistant sand surface 20 on the arc-shaped detection capsule 19 increases, thereby making the friction force of the subsequent simulated detection on this side larger, which is more in line with the actual use scenario of the shaftless spiral blade 3, and the rotation of the shaftless spiral blade 3 is converted into the inner semi-ring 11 and the half-ring detection cover 2), the rotation of the inner half ring 11 will drive the multiple fixed arc plates 12 to rotate, thereby driving the multiple limit arc plates 14 to slide in the arc-shaped groove on the inner wall of the half-ring detection cover 2. The sliding of the arc surface of the limit arc plate 14 will drive the piston plate to compress the hydraulic oil in the lower exchange liquid tank 16 through the arc piston rod 15. After the hydraulic oil in the lower exchange liquid tank 16 is pressurized, it will be pressed into the upper exchange liquid tank 16 through the throttling pipe 17. At the same time, the arc piston rod 15 on the other side will drive the piston plate to slide down, so that the space in the lower exchange liquid tank 16 on the other side increases and creates negative pressure. Then, the hydraulic oil in the upper exchange liquid tank 16 on the other side will be pressed into the lower exchange liquid tank 16 under the influence of its own gravity and negative pressure. Due to the narrowing of the channel of the throttling pipe 17 (such as Figure 6As shown in the figure, the flow path of the throttling pipe 17 between the upper and lower exchange fluid tanks 16 is narrower), so that the flow of hydraulic oil in the throttling pipe 17 is blocked, that is, a resistance is given to the limit arc plate 14 sliding in this direction, which is converted into a rotation obstruction of the inner semi-ring 11 in the semi-ring detection cover 2, so that the rotation of the inner semi-ring 11 and the shaftless spiral blade 3 is not synchronized, and the arc detection capsule 19 fixedly connected to the inner wall of the inner semi-ring 11 is also not synchronized with the deflection of the shaftless spiral blade 3, so that the arc detection capsule 19 on the inner wall of the inner semi-ring 11 and the shaftless spiral blade 3 in flexible contact have a relative slip within a certain range, so that the wear-resistant sand surface 20 of the arc detection capsule 19 is continuously reciprocated on the blade surface of the shaftless spiral blade 3.

[0044] During the above-mentioned entire simulation process, the shaftless spiral blade 3 initially drives the inner half ring 11 to rotate in the half ring detection cover 2 through the arc detection capsule 19, which is equivalent to a static friction state. As the deflection angle of the rotating shaftless spiral blade 3 increases, the arc detection capsule 19 drives the inner half ring 11 to rotate in the half ring detection cover 2 and encounters increasing resistance. At this time, relative slip occurs between the shaftless spiral blade 3 and the arc detection capsule 19, which is a sliding friction simulation state. When the maximum resistance state of the buffer damping component is finally reached, the friction between the shaftless spiral blade 3 and the arc detection capsule 19 also reaches the maximum state, thereby simulating the friction under different states that the shaftless spiral blade 3 will encounter during use, making the entire simulation detection more comprehensive.

[0045] In this way, the obstructed rotation of the inner semi-ring 11 in the semi-ring detection cover 2 can be used to drive the wear-resistant sand surface 20 of the arc detection capsule 19 to continuously rub against the blade surface of the shaftless spiral blade 3, simulating the continuous wear state of the shaftless spiral blade 3 during use. The arc detection capsule 19 and the shaftless spiral blade 3 are also more in line with the actual use state of the shaftless spiral blade 3, making the detection result more accurate;

[0046] Then, the angle controller 4 is closed, and the hydraulic pump body in the hydraulic box 9 is started, and the liquid is continuously pressed into the inner semi-ring 11 through the connecting hose 10, and the hydraulic pressure in the inner semi-ring 11 will continue to increase. Since the hydraulic setting value of the overflow valve 18 closest to the extrusion end of the shaftless spiral blade 3 is the smallest, it will be opened first, and the hydraulic pressure in the arc detection capsule 19 close to the extrusion end of the shaftless spiral blade 3 will increase first, and gradually begin to increase in the direction of the input end of the shaftless spiral blade 3. In this way, the hydraulic box 9 and the overflow valve 18 with different hydraulic setting values ​​can be used to gradually increase the hydraulic pressure from the extrusion end to the input end of the shaftless spiral blade 3, simulating the state that when the shaftless spiral blade 3 is squeezed on the sludge, the closer the position is to the extrusion end, the greater the resistance in the extrusion direction is, so that the detection result is more in line with the use of the shaftless spiral blade 3.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A screw extruder characteristic testing device, comprising a test bench (1) for testing a shaftless spiral blade (3) and two half-ring test covers (2), characterized in that: The detection platform (1) is fixedly connected to an angle controller (4) via a mounting seat; two docking electric control guide rails (5) are fixedly connected to the top of the detection platform (1); the inner side walls of the docking electric control guide rails (5) are connected to a retaining seat (7) via a guide seat (6); the retaining seat (7) is connected to a semi-ring detection cover (2) located above via a semi-ring detection cover (2) located below; and an inner measuring semi-ring (11) is connected to the outer side wall of the semi-ring detection cover (2) at one end away from the angle controller (4) via a hydraulic component; A plurality of arc-shaped grooves are provided on the inner side wall of the semi-ring detection cover (2), a fixed arc plate (12) for connecting to the inner semi-ring (11) is provided in the arc-shaped groove, the fixed arc plate (12) is respectively connected to two arc-shaped piston rods (15) through a limit assembly, the two arc-shaped piston rods (15) are commonly connected to a buffer damping assembly, the inner side wall of the inner semi-ring (11) is connected to a plurality of arc-shaped detection capsules (19) through a plurality of overflow valves (18), and a wear-resistant sand surface (20) is provided on the side wall of the arc-shaped detection capsule (19); The inner cavity of the inner semi-ring (11) is connected to the inner cavity of the arc-shaped detection capsule (19) via an overflow valve (18), and the hydraulic pressure setting values ​​of the plurality of overflow valves (18) gradually increase from an end away from the angle controller (4) to an end close to the angle controller (4).

2. A screw extruder characteristic testing device according to claim 1, characterized in that: The bottom end of the detection platform (1) is fixedly connected to a plurality of support seats, the inner side wall of the docking electric control guide rail (5) is slidably connected to the side wall of the guide seat (6), and the guide seat (6) is fixedly connected to the outer side wall of the semi-ring detection cover (2) located below via a retaining seat (7).

3. A screw extruder characteristic testing device according to claim 1, characterized in that: The semi-ring detection cover (2) located at the bottom is rotatably connected to the semi-ring detection cover (2) located at the top via a hinge structure (8); the semi-ring detection cover (2) located at the bottom is fixedly connected to an electromagnetic positioning plate (21) at one end close to the angle controller (4).

4. A screw extruder characteristic testing device according to claim 1, characterized in that: The hydraulic assembly is composed of a hydraulic box (9) and a connecting hose (10); a side wall of the hydraulic box (9) is fixedly connected to an outer wall of the half-ring detection cover (2) at one end away from the angle controller (4); and the hydraulic box (9) is connected to an internal cavity of the inner half-ring (11) via the connecting hose (10).

5. A screw extruder characteristic testing device according to claim 1, characterized in that: The limiting assembly is composed of an adapter plate (13) and a limiting arc plate (14); the outer side wall of the inner semi-ring (11) is respectively fixedly connected to the inner arc side walls of a plurality of fixed arc plates (12); the outer arc side walls of the fixed arc plates (12) are fixedly connected to the side walls of the limiting arc plates (14) via the adapter plate (13); and the end of the limiting arc plate (14) is fixedly connected to the arc piston rod (15).

6. A screw extruder characteristic testing device according to claim 1, characterized in that: The buffer damping assembly is composed of two exchange fluid tanks (16) and two throttling flow pipes (17), and the arc-shaped piston rod (15) is slidably connected to the inner side wall of the exchange fluid tank (16) located below via a piston plate.

7. A screw extruder characteristic testing device according to claim 1, characterized in that: The exchange liquid tank (16) located below is connected to the exchange liquid tank (16) located above via two throttling pipes (17), and the exchange liquid tank (16) is fixedly connected to the inner side wall of the arc-shaped groove of the semi-ring detection cover (2).

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