Abrasion detection device for blades of screw shaft of screw conveyer

Abstract

The utility model discloses a screw conveyor screw shaft blade wear detection device, and solves the problems of high difficulty and low precision of screw shaft blade wear detection in the prior art. The utility model relates to a screw conveyor screw shaft blade wear detection device, which comprises a fixed seat arranged on a screw conveyor cylinder in a sealing manner, a telescopic driving piece with a stroke sensor is arranged on the fixed seat, and one end of the telescopic driving piece extending into the screw conveyor cylinder is connected with a detection plate corresponding to a screw blade. The detection plate is provided with an abrasion detection piece for measuring the abrasion loss of the detection plate; according to the device, the oil cylinder, the displacement sensor and the like are adopted, and the function of rapidly measuring the abrasion loss of the spiral shaft can be achieved through the displacement generated when the oil cylinder pushes the lower detection plate in a closed environment. The wear detection device provided by the utility model solves the problems of difficulty in wear detection, high detection cost, untimely detection, low detection precision and the like of the screw shaft of the screw conveyer on site, and realizes the purposes of convenience, rapidness and high accuracy in wear detection of the screw shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of screw conveyors, in particular to a screw shaft blade wear detection device. Background Art

[0002] When the shield machine's screw conveyor is in use, it needs to transport the soil from the soil bin to the belt conveyor system so that the shield machine can smoothly discharge the soil. During normal operation, the soil and the screw shaft are in constant frictional contact, and the soil contains high-hardness impurities such as stones and quartz, which will cause significant wear on the screw shaft blades. When the wear reaches a certain level, the soil will be blocked.

[0003] Currently, there is no effective method for detecting blade wear. In order to detect the wear of the spiral shaft blades, an observation window is generally designed on the cylinder wall of the screw conveyor. However, the interior of the cylinder of the screw conveyor is basically pressurized when the screw conveyor is in use. When opening the observation window to detect the wear of the spiral shaft, it is necessary to stop the screw conveyor, disconnect the screw conveyor from the front soil bin, clean the slag inside the cylinder, and then remove the observation window. The workload on site is huge. Existing wear detection methods, such as the screw conveyor blade wear detection device and shield machine with publication number CN117722925 A, judge the wear of the blades by the length of the detection rod extending into the conveying pipe. However, this measurement method uses fixed-point detection, which is greatly affected by the cleanliness of the blades, has limited measurement sites, and low measurement accuracy. Therefore, it is necessary to develop a high-precision spiral shaft wear detection device to solve the problems of difficulty in wear detection, high detection cost, and untimely detection caused by the spiral shaft blades of existing screw conveyors being in a closed state and being rotating bodies. Utility Model Content

[0004] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a device for detecting wear of spiral shaft blades of a screw conveyor, which solves the problem of great difficulty and low precision in detecting wear of spiral shaft blades in the prior art.

[0005] The technical solution of the present utility model is achieved as follows: a device for detecting wear of the spiral shaft blades of a screw conveyor, comprising a fixed seat sealed against the screw conveyor barrel, a telescopic drive member with a stroke sensor disposed on the fixed seat, and a detection plate corresponding to the spiral blade connected to one end of the telescopic drive member extending into the screw conveyor barrel. The detection plate is provided with a wear detection member for measuring the wear of the detection plate. The device utilizes a cylinder and a displacement sensor, and can rapidly measure the wear of the spiral shaft in a closed environment by the displacement generated by the cylinder pushing the lower detection plate. By measuring the wear of the detection plate, measurement errors are reduced and measurement accuracy is improved.

[0006] Furthermore, the length of the detection plate is preferably greater than one pitch of the spiral blades. This ensures that the detection plate remains in contact with the blades regardless of their rotational position during measurement, ensuring effective measurement. By repeatedly measuring the wear of the spiral blades at different positions, the wear of the blades across the entire area can be estimated, improving data accuracy.

[0007] Further preferably, the telescopic drive member is a telescopic cylinder, the cylinder of the telescopic cylinder being fixed to the fixing base via an ear plate, and the rod of the telescopic cylinder passing through the fixing base and fixed to the detection plate. Further preferably, the rod of the telescopic cylinder is threadedly engaged with the second threaded hole on the detection plate, and a sealing ring is provided between the rod of the telescopic cylinder and the fixing base.

[0008] Further preferably, the wear detection member is a wear detection bolt, and at least two wear detection bolts are provided on the detection plate. Specifically, the wear detection bolt includes a bolt seat fixed to a fixing seat, a stud being threadedly connected to the bolt seat, a resistance sensor being embedded in the stud, and the lower end of the stud extending into a through hole in the detection plate and flush with the bottom surface of the detection plate.

[0009] Further preferably, the detection plate is provided with a detachable guide post, which is slidably engaged with a guide hole provided on the fixing seat. Specifically, the lower portion of the guide post is provided with an external thread and is threadedly engaged with a first threaded hole provided on the detection plate, and a sealing ring is provided between the guide post and the fixing seat.

[0010] Further preferably, a detection port is opened on the screw conveyor cylinder, and the fixing seat is fixed to the detection port by bolts. Preferably, the fixing seat includes an upper flange and a lower fixing plate that are fixedly connected, the lower fixing plate is sealed and docked with the screw conveyor cylinder, and the upper flange is fixed to the screw conveyor cylinder by bolts.

[0011] The beneficial effects of the present invention are as follows: the present invention can realize the function of quickly measuring the wear of the screw shaft in a closed environment by pushing the displacement generated by the detection plate through the telescopic drive member; the length of the detection plate is greater than one pitch of the screw blade, ensuring that no matter which position the screw blade rotates to, it can have an intersection with the detection plate, thereby ensuring that each measurement has valid data, and by repeatedly measuring the wear of the blades when the screw shaft rotates to different positions, a more comprehensive understanding of the wear of the blades in the entire area can be obtained, thereby improving the accuracy of the data. The wear of the detection plate itself is detected by the wear detection member, thereby improving the accuracy of the detection plate in detecting blade wear. The wear detection device of the present invention solves the problems of difficulty in on-site detection of screw conveyor screw shaft wear, high detection cost, untimely detection and low detection accuracy, and achieves the purpose of convenient, fast and high accuracy in screw shaft wear detection, and has the advantages of small workload and small impact on on-site excavation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 This is a schematic diagram of the structure of the retracting drive component of the utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the detection board of the utility model.

[0016] Figure 4 This is a schematic diagram of the structure of the wear detection component of the utility model.

[0017] Figure 5 This is a schematic diagram of the detection state structure of the utility model. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1 As shown in Example 1, a device for detecting wear of the spiral shaft blades of a screw conveyor comprises a fixed seat 9 sealed on the screw conveyor barrel 6; the fixed seat is the main supporting component of the wear detection device, ensuring that the wear detection device can be stably connected to the screw conveyor barrel 6. A telescopic drive member 1 with a stroke sensor is provided on the fixed seat 9, and one end of the telescopic drive member 1 extending into the screw conveyor barrel 6 is connected to a detection plate 5 corresponding to the spiral blade 7; the telescopic drive member 1 provides power for the movement of the detection plate; the telescopic drive member 1 can adopt an oil cylinder or an air cylinder, and of course it can also be driven by screwing in a bolt to move the detection plate. In this embodiment, the purpose of quickly measuring the wear of the spiral shaft blades is achieved by pushing the displacement generated by the lower detection plate by the telescopic drive member 1. A wear detection member 3 for measuring the wear of the detection plate 5 is provided on the detection plate 5. The wear detection member 3 is used to detect the wear of the detection plate 5 itself, thereby improving the accuracy of the detection plate in detecting blade wear.

[0020] It should be pointed out in this embodiment that the length of the detection plate 5 is greater than one pitch of the spiral shaft blade; it is ensured that no matter which position the spiral blade rotates to, it can have an intersection with the detection plate, thereby ensuring that there is data for each measurement. By measuring different positions of the spiral shaft rotation multiple times, the wear amount of the blades in the entire area can be more accurately understood, thereby improving the accuracy of the data.

[0021] like Figure 2 As shown, Example 2 is a device for detecting wear of the spiral shaft blades of a screw conveyor, which is further improved on the basis of Example 1. In this embodiment, the fixed seat 9 can also be fixed at the observation window, and the telescopic drive member 1 is a telescopic cylinder 11. The telescopic cylinder 11 can be an air cylinder or an oil cylinder. In this embodiment, an oil cylinder is preferably used. The barrel of the telescopic cylinder 11 is fixed to the fixed seat 9 through an ear plate 13, and the ear plate is fixed to the fixed seat by bolts to achieve its detachable connection. The rod 12 of the telescopic cylinder 11 passes through the fixed seat 9 and is fixed to the detection plate 5; under the action of the telescopic cylinder, the detection plate moves relative to the spiral blade, and the wear amount of the spiral blade is judged by the distance from the detection plate to the spiral blade at different times; and the distance from the detection plate to the spiral blade is determined by the stroke sensor of the telescopic cylinder body.

[0022] In this embodiment, the rod 12 of the telescopic cylinder 11 is threadedly engaged with the second threaded hole 52 on the detection plate 5, and a sealing ring 4 is provided between the rod 12 of the telescopic cylinder 11 and the fixed seat 9. The oil cylinder with the stroke sensor passes through the screw conveyor barrel or the observation window and is connected to the lower detection plate by thread, facilitating the installation and replacement of the detection plate.

[0023] like Figure 4 As shown in Example 3, a device for detecting wear of the spiral shaft blades of a screw conveyor is further improved upon Example 1 or 2. In this embodiment, the wear detection member 3 is a wear detection bolt, and at least two wear detection bolts are provided on the detection plate 5, ensuring accurate measurement of detection plate wear. Under actual operating conditions, the spiral shaft blades of a screw conveyor are in a closed state, and the detection plate 5 will wear under long-term operation. Therefore, the wear detection member 3 detects the wear of the detection plate 5 itself, thereby improving the accuracy of measuring the wear of the spiral blades.

[0024] The wear detection bolt in this embodiment includes a bolt seat 32 fixed to a fixing base 9. A stud 31 is threadedly connected to the bolt seat 32. A resistance sensor is embedded in the stud 31. The lower end of the stud 31 extends into a through-hole 53 in the detection plate 5 and is flush with the bottom surface of the detection plate 5. The resistance sensor measures the wear of the detection plate during use. Specifically, the resistance core of the resistance sensor is embedded in the stud, which is equivalent to a series of resistors. During operation, its end is flush with the bottom surface of the detection plate 5 and wears simultaneously with the detection plate, achieving the purpose of real-time detection of the detection plate wear.

[0025] like Figure 3As shown, in this embodiment, the detection plate 5 is provided with a removable guide post 2, which slides with a guide hole provided in the fixing seat 9, ensuring the precise movement of the detection plate. The lower portion of the guide post 2 is provided with an external thread that threadably engages with a first threaded hole 51 provided in the detection plate 5. A sealing ring 4 is provided between the guide post 2 and the fixing seat 9. The multiple sealing rings ensure the airtightness of the cylinder.

[0026] like Figure 1 As shown, Example 4 is a device for detecting wear of the spiral shaft blades of a screw conveyor, which is further improved on the basis of Example 1, 2 or 3. A detection port 8 is opened on the screw conveyor barrel 6, and a fixing seat 9 is fixed to the detection port 8 by bolts. The fixing seat 9 includes an upper flange 9-1 and a lower fixing plate 9-2 that are fixedly connected. The lower fixing plate 9-2 is sealed and docked with the screw conveyor barrel 6 to ensure the airtightness of the barrel. The upper flange 9-1 is fixed to the screw conveyor barrel 6 by bolts; the telescopic drive member 1, the wear detection member 3, etc. are connected to the lower fixing plate 9-2.

[0027] like Figure 5 As shown, before testing the wear of the spiral shaft blades, the interior of the cylinder must first be cleared of the soil. If the interior is pressurized, mud or gas is used to build pressure to ensure accurate measurements. Once the soil is emptied, the spiral shaft stops rotating, and the telescopic drive slowly extends, pushing the lower detection plate toward the spiral blades until the plate contacts the blades and stops extending. The displacement of the telescopic drive at this point is recorded. The cylinder displacement at this point is then subtracted from the cylinder displacement recorded during the initial measurement, and the measured value of the wear detection bolt (the wear of the detection plate) is subtracted. The resulting data represents the wear of the spiral shaft blades at that location. This wear detection device solves the problems of difficult, costly, and untimely testing of screw conveyor shaft wear on-site. This solution ensures convenient, fast, and accurate testing of the screw shaft wear, with minimal workload and minimal impact on on-site excavation.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A screw conveyor screw shaft blade wear detection device, characterized by: The invention comprises a fixed seat (9) sealedly arranged on a screw conveyor barrel (6), a telescopic driving member (1) with a stroke sensor being provided on the fixed seat (9), a detection plate (5) corresponding to a spiral blade (7) being connected to one end of the telescopic driving member (1) extending into the screw conveyor barrel (6), and a wear detection member (3) for measuring the wear amount of the detection plate (5) being provided on the detection plate (5).

2. The screw conveyor screw shaft blade wear detection device according to claim 1, characterized in that: The length of the detection plate (5) is greater than one pitch of the spiral shaft blades.

3. The screw conveyor screw shaft blade wear detection device according to claim 2, characterized in that: The telescopic drive member (1) is a telescopic cylinder (11), the barrel of the telescopic cylinder (11) is fixed to the fixing seat (9) via an ear plate (13), and the rod (12) of the telescopic cylinder (11) passes through the fixing seat (9) and is fixed to the detection plate (5).

4. The screw conveyor screw shaft blade wear detection device according to claim 3, characterized in that: The rod (12) of the telescopic cylinder (11) is threadedly engaged with the second threaded hole (52) on the detection plate (5), and a sealing ring (4) is provided between the rod (12) of the telescopic cylinder (11) and the fixing seat (9).

5. The screw conveyor screw shaft blade wear detection device according to any one of claims 1 to 4, characterized in that: The wear detection member (3) is a wear detection bolt, and at least two wear detection bolts are provided on the detection plate (5).

6. The screw conveyor screw shaft blade wear detection device according to claim 5, characterized in that: The wear detection bolt comprises a bolt seat (32) fixed on a fixing seat (9), a stud (31) being threadedly connected to the bolt seat (32), a resistance sensor being embedded in the stud (31), and a lower end of the stud (31) extending into a through hole (53) on the detection plate (5) and flush with the bottom surface of the detection plate (5).

7. The screw conveyor screw shaft blade wear detection device according to claim 1 or 6, characterized in that: The detection plate (5) is provided with a detachable guide column (2), and the guide column (2) is slidably engaged with a guide hole provided on the fixing seat (9).

8. The screw conveyor screw shaft blade wear detection device according to claim 7, characterized in that: The lower portion of the guide column (2) is provided with an external thread that is threadably engaged with a first threaded hole (51) provided on the detection plate (5); a sealing ring (4) is provided between the guide column (2) and the fixing seat (9).

9. The screw conveyor screw shaft blade wear detection device according to claim 1 or 8, characterized in that: The screw conveyor barrel (6) is provided with a detection port (8), and the fixing seat (9) is fixed to the detection port (8) by means of bolts.

10. The screw conveyor screw shaft blade wear detection device according to claim 9, characterized in that: The fixing seat (9) comprises an upper flange (9-1) and a lower fixing plate (9-2) that are fixedly connected, the lower fixing plate (9-2) is sealed and docked with the screw conveyor barrel (6), and the upper flange (9-1) is fixed to the screw conveyor barrel (6) via bolts.

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