A method for detecting rope slack overload of a stacker

Abstract

The present application relates to the technical field of stacker rope loosening and overload detection, and particularly relates to a stacker rope loosening and overload detection method, which comprises a supporting seat, a sleeve and a pull rod, the supporting seat is installed on a cross beam of a stacker, a disc spring is sleeved on the pull rod, a tension sensor is connected to one end of the pull rod away from the sleeve through a ball hinge structure, and a steel wire rope is connected to one end of the tension sensor away from the sleeve; when the positional relationship between the sleeve and a rope loosening and overload assembly changes, the rope loosening and overload assembly can detect whether the stacker is overloaded or the rope is broken according to the change in the positional relationship. The present application uses the combination of a tension sensor, an overload detection switch, a rope loosening detection switch and a pull rope sensor, realizes multiple safeguards of "accurate data + mechanical redundancy + complementary functions", avoids the false alarm or failure of a single protection mechanism, and significantly improves safety, reliability and maintenance efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rope slack and overload detection of a stacker, and particularly relates to a rope slack and overload detection method of a stacker. BACKGROUND

[0002] Rope slack and overload protection is an extremely important index for safety protection. The commonly used rope slack and overload scheme detects through the deformation of the mechanism to trigger the micro switch.

[0003] If the Chinese patent CN220431183U discloses an overload rope slack structure. The comparative patent moves the second sleeve by setting the pull rod to contact the overload switch, so that the external device clamps the rope to avoid the risk of wire rope rupture. When the weight of the goods pulled by the rope is lower than the threshold, the second sleeve is moved back by the elastic element to open the rope slack switch, so that the external device clamps the rope to avoid the goods from falling, and has high safety performance.

[0004] However, the applicant finds that the above-mentioned comparative patent only uses the rope slack detection switch and the overload detection switch to judge whether the stacker is in the rope slack or overload state, and the single protection mechanism does not have multiple redundant protection, which is prone to false positives or failures, thereby reducing the safety and reliability of the detection device. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a rope slack and overload detection method of a stacker to solve the problem of low safety and reliability caused by the single protection mechanism of the existing rope slack detection switch and overload detection switch.

[0006] Based on the above purpose, the present application provides a rope slack and overload detection method of a stacker, which comprises a rope slack and overload detection device installed on a stacker beam. The rope slack and overload detection device comprises a support seat, a sleeve and a pull rod. The support seat is installed on the stacker beam, and the support seat and the sleeve are both provided with through holes for the pull rod to pass through. One end of the pull rod passes through the support seat and the sleeve in sequence. A disc spring is sleeved on the pull rod, one end of the disc spring is in contact with the inner wall of the sleeve, and the other end is in contact with the support seat.

[0007] The pull rod is provided with an external thread at one end close to the sleeve, and a locking nut is threadedly connected to the external thread, and a tension sensor is connected to the other end of the pull rod through a ball hinge structure, and a steel wire rope is connected to the other end of the tension sensor away from the sleeve, and a loose rope overload assembly is mounted on the support base and in contact with the sleeve, and when the position relationship between the sleeve and the loose rope overload assembly changes, the loose rope overload assembly can detect whether the stacker is overloaded or the rope is broken according to the change of the position relationship, and the loose rope overload assembly comprises a bracket mounted on the support base, and a position-adjustable loose rope detection switch and an overload detection switch are mounted on the bracket.

[0008] The method further comprises a pull rope sensor mounted on the support base, and the pull rope end of the pull rope sensor is connected to the sleeve.

[0009] The method comprises the following steps:

[0010] S1, determining the free extension amount L0 of the disc spring of the stacker in the loose rope state, the extension amount L1 of the disc spring of the stacker in the empty load state, and the extension amount L2 of the disc spring of the stacker in the full load state through the pull rope sensor, and determining the tension value F1 of the tension sensor of the stacker in the empty load state and the tension value F2 of the tension sensor of the stacker in the full load state;

[0011] S2, installing the loose rope detection switch in the empty load state of the stacker, so that the contact end of the loose rope detection switch is pressed against one end of the sleeve close to the support base;

[0012] S3, installing the overload detection switch in the full load state of the stacker, so that the contact end of the overload detection switch is pressed against the other end of the sleeve away from the support base;

[0013] S4, determining the extension amount LT of the disc spring in real time through the pull rope sensor, and determining the tension FT of the steel wire rope in real time through the tension sensor;

[0014] S5, detecting whether the stacker is overloaded or the rope is broken according to the extension amount LT of the disc spring, the tension FT of the steel wire rope, and the position relationship between the loose rope detection switch and the overload detection switch and the sleeve.

[0015] Preferably, in S1, the pull rope end of the pull rope sensor is flush with one end of the disc spring in the sleeve.

[0016] Preferably, in S1, the change amount L01 of the disc spring in the empty load state of the stacker is L0-L1, and the change amount L02 of the disc spring in the full load state of the stacker is L0-L2; the change amount of L01 and L02 of the disc spring is detected in real time, and if any one of L01 or L02 exceeds the rated range, it is determined that the elastic performance of the disc spring has changed, and the disc spring needs to be checked.

[0017] Preferably, in S5, if L1 < LT < L0, FT < F1 and the rope slack detection switch is disengaged from the sleeve, it is determined that the stacker is in a rope breakage state at this time, and the stacker issues an alarm; if LT < L2, FT > F2 and the overload detection switch is disengaged from the sleeve, it is determined that the stacker is in an overload state at this time, and the stacker issues an alarm.

[0018] The beneficial effects of the present application: in the stacker rope slack overload detection system, the combination of tension sensors + overload detection switches + rope slack detection switches + rope tension sensors is used, realizing the multiple safeguards of "accurate data + mechanical redundancy + complementary functions", avoiding the false alarm or failure of a single protection mechanism, significantly improving safety, reliability and maintenance efficiency. In addition, by detecting the change of the disc spring in the empty or full load state in real time, whether the performance of the disc spring has changed is detected, further improving the safety of using the stacker. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0020] Figure 1 The structure diagram of the rope slack overload detection device of the present application installed on the cross beam of the stacker;

[0021] Figure 2 The structure diagram of the present application.

[0022] In the figure: 1, support seat; 2, sleeve; 3, pull rod; 4, disc spring; 5, tension sensor; 6, steel wire rope; 7, bracket; 8, rope slack detection switch; 9, overload detection switch; 10, rope tension sensor. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present application more clear and obvious, the present application will be further described in detail below in combination with specific embodiments and with reference to the drawings.

[0024] It should be noted that the technical terms or scientific terms used in the embodiments of the present application should be understood as the general meanings understood by those skilled in the art in the field of the present application, unless otherwise defined. The terms "first", "second", and similar terms used in the present application do not represent any order, number, or importance, but are only used to distinguish different components. The terms "include", "contain", and similar terms mean that the elements or objects before the terms cover the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0025] As shown in Figure 1 , Figure 2 A rope slack overload detection method for a stacker, comprising a rope slack overload detection device installed on a beam of the stacker, the rope slack overload detection device comprising a support seat 1, a sleeve 2, and a pull rod 3, the support seat 1 is installed on the beam of the stacker, and the support seat 1 and the sleeve 2 are both provided with through holes for the pull rod 3 to pass through, and one end of the pull rod 3 passes through the support seat 1 and the sleeve 2 in sequence, a disc spring 4 is sleeved on the pull rod 3, one end of the disc spring 4 is in contact with the inner wall of the sleeve 2, and the other end is in contact with the support seat 1.

[0026] One end of the pull rod 3 close to the sleeve 2 is provided with external threads, and a locking nut is threadedly connected on the external threads, one end of the pull rod 3 away from the sleeve 2 is connected with a tension sensor 5 through a ball hinge structure, one end of the tension sensor 5 away from the sleeve 2 is connected with a steel wire rope 6, and the support seat 1 is provided with a rope slack overload assembly, and the rope slack overload assembly is in contact with the sleeve 2, when the positional relationship between the sleeve 2 and the rope slack overload assembly changes, the rope slack overload assembly can detect whether the stacker is overloaded or the rope is broken according to the change of the positional relationship.

[0027] The rope slack overload assembly comprises a bracket 7 installed on the support seat 1, the bracket 7 is provided with a position-adjustable rope slack detection switch 8 and an overload detection switch 9, and the positional relationship between the rope slack detection switch 8, the overload detection switch 9, and the sleeve 2 can determine whether the stacker is in a rope breaking or overload state.

[0028] The rope tension sensor 10 is installed on the support base 1 and the rope end of the rope tension sensor 10 is connected to the sleeve 2, and the rope end of the rope tension sensor 10 is flush with one end of the disc spring 4 in the sleeve 2, so that when the stacker is running, the change in the displacement of the sleeve 2 detected by the rope tension sensor 10 is the change in the extension and contraction amount of the disc spring 4, because the change amount of the disc spring 4 in the empty load state or the full load state of the stacker is within a certain range, when the change amount of the disc spring 4 exceeds the rated range, it proves that the performance of the disc spring 4 has changed, so that the change amount of the disc spring 4 in the empty load state or the full load state can be detected in real time to detect whether the performance of the disc spring 4 has changed, thereby further improving the safety of the stacker.

[0029] The method comprises the following steps:

[0030] S1, determining the free extension and contraction amount L0 of the disc spring 4 of the stacker in the loose rope state, the extension and contraction amount L1 of the disc spring 4 of the stacker in the empty load state, and the extension and contraction amount L2 of the disc spring 4 of the stacker in the full load state by the rope tension sensor 10; and determining the tension value F1 of the tension sensor 5 of the stacker in the empty load state and the tension value F2 of the tension sensor 5 of the stacker in the full load state;

[0031] In S1, the rope end of the rope tension sensor 10 is flush with one end of the disc spring 4 in the sleeve 2, so that when the stacker is running, the change in the displacement of the sleeve 2 detected by the rope tension sensor 10 is the change in the extension and contraction amount of the disc spring 4.

[0032] In S1, the change amount L01=L0-L1 of the disc spring 4 in the empty load state of the stacker, and the change amount L02=L0-L2 of the disc spring 4 in the full load state of the stacker; the change amount of L01 and L02 of the disc spring 4 is detected in real time, if any one of L01 or L02 exceeds the rated range, it is determined that the elastic performance of the disc spring 4 has changed, and the disc spring 4 needs to be checked.

[0033] S2, installing the loose rope detection switch 8 in the empty load state of the stacker, so that the contact end of the loose rope detection switch 8 at this time is just pressed against one end of the sleeve 2 close to the support base 1;

[0034] S3, installing the overload detection switch 9 in the full load state of the stacker, so that the contact end of the overload detection switch 9 at this time is just pressed against one end of the sleeve 2 away from the support base 1;

[0035] S4, determining the extension and contraction amount LT of the disc spring 4 in real time by the rope tension sensor 10, and determining the tension FT of the steel wire rope 6 in real time by the tension sensor 5;

[0036] S5, according to the telescopic amount LT of the disc spring 4, the tension FT of the steel wire rope 6, and the position relationship between the loose rope detection switch 8 and the sleeve 2 and the overload detection switch 9 and the sleeve 2, whether the stacker is overloaded or the rope is broken is detected.

[0037] In S5, if L1 < LT < L0, FT < F1, and the loose rope detection switch 8 is separated from the sleeve 2, it is judged that the stacker is in the rope breaking state at this time, and the stacker issues an alarm; if LT < L2, FT > F2, and the overload detection switch 9 is separated from the sleeve 2, it is judged that the stacker is in the overload state at this time, and the stacker issues an alarm.

[0038] The application realizes the multiple protections of "data precision + mechanical redundancy + function complementation" through the combination of the tension sensor + overload detection switch and the loose rope detection switch + tension rope sensor, avoids the false alarm or failure of a single protection mechanism, significantly improves the safety, reliability and maintenance efficiency, has a simple structure and is efficient, and is convenient to check and maintain.

[0039] Those skilled in the art should understand that the above discussion of any embodiment is only exemplary and is not intended to imply that the scope of the application is limited to these examples; under the idea of the application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the application as described above. In order to be brief, they are not provided in details.

[0040] Embodiments of the application are intended to cover all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Accordingly, any and all such modifications, variations or equivalents that fall within the spirit and scope of the application are intended to be included within the scope of the application.

Claims

1. A method for slack rope overload detection of a stacker, characterized by, The device comprises a support base (1), a sleeve (2) and a pull rod (3), the support base (1) is installed on a cross beam of a stacker, and the support base (1) and the sleeve (2) are both provided with a through hole for the pull rod (3) to pass through, and one end of the pull rod (3) passes through the support base (1) and the sleeve (2) in sequence, a disc spring (4) is sleeved on the pull rod (3), one end of the disc spring (4) is in contact with the inner wall of the sleeve (2), and the other end is in contact with the support base (1); One end of the pull rod (3) close to the sleeve (2) is provided with an external thread, and a locking nut is threadedly connected on the external thread, one end of the pull rod (3) away from the sleeve (2) is connected with a tension sensor (5) through a ball hinge structure, one end of the tension sensor (5) away from the sleeve (2) is connected with a steel wire rope (6), the support base (1) is provided with a loose rope overload assembly, and the loose rope overload assembly is in contact with the sleeve (2), when the positional relationship between the sleeve (2) and the loose rope overload assembly changes, the loose rope overload assembly can detect whether the stacker is overloaded or the rope is broken according to the change of the positional relationship, the loose rope overload assembly comprises a support (7) installed on the support base (1), and a position-adjustable loose rope detection switch (8) and an overload detection switch (9) are installed on the support (7); Further comprising a pull rope sensor (10) installed on the support base (1), and a pull rope end of the pull rope sensor (10) is connected with the sleeve (2); The method comprises the following steps: S1, determining the free extension amount L0 of the disc spring (4) in the loose rope state of the stacker, the extension amount L1 of the disc spring (4) in the empty load state of the stacker, and the extension amount L2 of the disc spring (4) in the full load state of the stacker through the pull rope sensor (10), and determining the tension value F1 of the tension sensor (5) in the empty load state of the stacker and the tension value F2 of the tension sensor (5) in the full load state of the stacker; S2, installing the loose rope detection switch (8) in the empty load state of the stacker, so that the contact end of the loose rope detection switch (8) is pressed against one end of the sleeve (2) close to the support base (1) at this time; S3, installing the overload detection switch (9) in the full load state of the stacker, so that the contact end of the overload detection switch (9) is pressed against one end of the sleeve (2) away from the support base (1) at this time; S4, determining the extension amount LT of the disc spring (4) in real time through the pull rope sensor (10), and determining the tension FT of the steel wire rope (6) in real time through the tension sensor (5); S5, detecting whether the stacker is overloaded or the rope is broken according to the real-time measured extension amount LT of the disc spring (4), the tension FT of the steel wire rope (6), and the positional relationship between the loose rope detection switch (8) and the overload detection switch (9) and the sleeve (2).

2. A rope slack overload detection method for a stacker according to claim 1, characterized in that, In S1, the pull rope end of the pull rope sensor (10) is flush with one end of the disc spring (4) located in the sleeve (2).

3. A rope slack overload detection method for a stacker according to claim 1, characterized in that, In S1, the change amount L01=L0-L1 of the disc spring (4) in the empty state of the stacker, and the change amount L02=L0-L2 of the disc spring (4) in the full state of the stacker; the change amount of L01 and L02 of the disc spring (4) is detected in real time, if any one of L01 or L02 exceeds the rated range, it is determined that the elastic performance of the disc spring (4) has changed, and the disc spring (4) needs to be checked.

4. A rope slack overload detection method for a stacker according to claim 1, characterized in that, In S5, if L1L0, FTF1, and the rope detection switch (8) is separated from the sleeve (2), it is judged that the stacker is in the broken rope state at this time, and the stacker issues an alarm; if LTL2, FT>F2, and the overload detection switch (9) is separated from the sleeve (2), it is judged that the stacker is in the overload state at this time, and the stacker issues an alarm.

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