A protection mechanism for a sedimentation tank mud scraper

Abstract

The application provides a protection mechanism of a sedimentation tank mud scraper, and mainly relates to the technical field of sewage treatment equipment. The protection mechanism of the sedimentation tank mud scraper comprises a main shaft of the mud scraper, the main shaft is divided into an upper main shaft and a lower main shaft, the upper main shaft and the lower main shaft are drivingly connected through an automatic disengaging mechanism, and the disengaging mechanism can automatically disconnect the driving connection between the upper main shaft and the lower main shaft. The application has the beneficial effect that when the main shaft of the mud scraper bears too large torque, the driving connection between the upper main shaft and the lower main shaft can be automatically disconnected, so that the upper main shaft cannot drive the lower main shaft to rotate, the upper main shaft is allowed to idle, and the upper main shaft is prevented from being damaged due to bearing too large torque.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the technical field of sewage treatment equipment, and particularly relates to a protection mechanism of a mud scraper of a sedimentation tank. BACKGROUND

[0002] The main function of the mud scraper is to collect and discharge the sludge deposited at the bottom of the tank, so as to return or concentrate the sludge for dewatering. The mud scraper has a relatively simple structure and is generally composed of a working bridge for walking, a transmission mechanism with a motor as a power output device, a mud scraper main shaft connected with the transmission mechanism, a mud scraping plate connected with the lower end of the mud scraper main shaft, and a scum collecting mechanism.

[0003] During intermittent production shutdown or equipment maintenance, the sludge in the mud collecting tank will naturally accumulate and deposit. After the production is resumed, the mud scraper is started, and the mud scraping plate will be subjected to a relatively large resistance from the accumulated sludge at the initial stage of operation. In the traditional equipment manufacturing, only a thermal relay is arranged in the motor control loop to protect the front-end driving device. The operation control of the mud scraper is to control the start and stop of the equipment by the frequency converter, to set the overcurrent and overload protection values by integrating the rated parameters of the mud scraper motor through parameter setting of the frequency converter, and to enhance the service life of the equipment by avoiding the mechanical damage such as slipping and chain falling off and abrasion through the mechanical tensioning device to make the chain have appropriate tension during transmission, so as to effectively protect the front-end driving device.

[0004] However, when the mud scraper main shaft and the mud scraping plate are working, the resistance encountered by the equipment during rotation will be greatly increased with the increase or dry deposit of the sludge in the mud tank. When the motor driving device drives the mud scraper main shaft to rotate, if the torque of the mud scraper main shaft cannot overcome the resistance of the sludge, the motor and the transmission mechanism will still forcibly drive the mud scraper main shaft to rotate. At this time, the mud scraper main shaft will be subjected to excessive torque, which is easy to cause damage such as bending or breaking of the mud scraper main shaft, resulting in irreparable damage. Therefore, on the basis of the traditional control mode of the original mud scraper equipment, a protection device needs to be further added. SUMMARY

[0005] To solve the problems in the prior art, the present application provides a protection mechanism of a mud scraper of a sedimentation tank. The mud scraper main shaft is divided into two sections and connected by a separable mechanism. When the mud scraper main shaft is subjected to excessive torque, the transmission connection between the upper main shaft and the lower main shaft is automatically disconnected, so that the upper main shaft cannot drive the lower main shaft to rotate, the upper main shaft is allowed to idle, and damage caused by excessive torque of the upper main shaft is avoided.

[0006] To achieve the above object, the present application adopts the following technical scheme:

[0007] The protection mechanism of a sedimentation tank mud scraper comprises a main shaft of the mud scraper, the main shaft is divided into an upper main shaft and a lower main shaft, the upper main shaft and the lower main shaft are drivingly connected through an automatic disengagement mechanism, and the disengagement mechanism can automatically disconnect the driving connection between the upper main shaft and the lower main shaft.

[0008] The disengagement mechanism comprises an upper housing with an open bottom, the bottom surface of the upper housing is rotatably installed on the top surface of a lower housing with an open top through a bearing, the bottom surface of the inner wall of the lower housing is fixedly installed on a vertical rod, the upper end of the vertical rod is integrally fixedly installed on a disc, the outer periphery of the vertical rod is sleeved with a sliding sleeve, the bottom of the outer periphery of the sliding sleeve is provided with an annular boss, the bottom surface of the disc is provided with a plurality of grooves, the top surface of the sliding sleeve is fixedly installed on a plurality of hemispherical protrusions corresponding to the grooves, the protrusions are respectively located in the corresponding grooves, the outer periphery of the sliding sleeve is sleeved with a first circular ring and a second circular ring, the top surface of the boss is in contact with the bottom surface of the first circular ring, the first circular ring and the second circular ring are clamped through a limiting mechanism, the bottom of the outer periphery of the second circular ring is rotatably connected with the inner wall of the upper housing through a bearing, a plurality of first sliding grooves are arranged in an array on the periphery of the inner wall of the upper housing, a first sliding block is slidingly and tightly installed in each first sliding groove, the inner side of each first sliding block is fixedly connected with the outer periphery of the first circular ring, a plurality of second sliding grooves are arranged in an array on the outer periphery of the sliding sleeve, a second sliding block is slidingly and tightly installed in each second sliding groove, the outer side of each second sliding block is fixedly connected with the inner wall of the second circular ring, the bottom surface of the first circular ring is connected with the bottom surface of the inner wall of the upper housing through a tension spring, the bottom surface of the sliding sleeve is connected with the bottom surface of the inner wall of the lower housing through a compression spring, the outer periphery of the second circular ring is provided with a reverse driven mechanism, the upper housing can drive the second circular ring to rotate synchronously through the reverse driven mechanism when the upper housing rotates reversely, one end of the upper main shaft is fixedly connected with the top surface of the upper housing, and one end of the lower main shaft is fixedly connected with the bottom surface of the lower housing.

[0009] The reverse driven mechanism comprises a tooth block, a plurality of strip-shaped grooves are arranged in an array on the outer periphery of the second circular ring, one end of the tooth block is rotatably connected with the strip-shaped grooves through a torsion spring, and the other end of the tooth block is located in the corresponding first sliding groove.

[0010] A limiting rod is fixedly installed in each strip-shaped groove, and the outer side of the limiting rod is in contact with the corresponding tooth block

[0011] The number of the first sliding grooves is the same as that of the second sliding grooves, and the first sliding grooves are oppositely arranged with the corresponding second sliding grooves.

[0012] The limiting mechanism comprises a clamping block, a plurality of clamping grooves are arranged in an annular array on the top surface of the first circular ring, a plurality of clamping blocks corresponding to the clamping grooves are fixedly installed on the bottom surface of the second circular ring, and the clamping blocks are respectively located in the corresponding clamping grooves and in contact with the clamping grooves.

[0013] The top surface of the boss is rotatably installed with a ring-shaped gasket through a bearing.

[0014] Compared with the prior art, the present application has the following advantages:

[0015] When the lower spindle stops rotating due to external force, the disengaging mechanism can automatically disconnect the transmission between the upper spindle and the lower spindle in a mechanical manner, has high reliability, and can better protect the spindle and prevent the spindle from being damaged by excessive torque. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present application;

[0017] Figure 2 is a schematic diagram of the internal structure of the upper shell of the present application;

[0018] Figure 3 is a schematic diagram of the cross-sectional structure of the upper shell of the present application;

[0019] Figure 4 is a schematic diagram of the cross-sectional structure along the line A-A; Figure 3

[0020] Figure 5 is a partial enlarged view of I of Figure 2

[0021] Figure 6 is a partial enlarged view of II of Figure 2

[0022] Figure 7 is a partial enlarged view of III of Figure 3

[0023] Figure 8 is a partial enlarged view of IV of Figure 4

[0024] Reference numerals in the drawings: 1, spindle; 1-1, upper spindle; 1-2, lower spindle; 2, upper shell; 3, lower shell; 4, vertical rod; 5, disc; 6, sliding sleeve; 7, boss; 8, groove; 9, protrusion; 10, first circular ring; 11, second circular ring; 12, first sliding groove; 13, first sliding block; 14, second sliding groove; 15, second sliding block; 16, tension spring; 17, compression spring; 18, tooth block; 19, strip-shaped groove; 20, limiting rod; 21, clamping block; 22, clamping groove. DETAILED DESCRIPTION

[0025] ​​​​​The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0026] Example: A protective mechanism for a sludge scraper in a sedimentation tank.

[0027] like Figures 1-8 As shown, a protective mechanism for a sedimentation tank sludge scraper has the following specific structure:

[0028] The main shaft 1 of the sludge scraper is divided into an upper main shaft 1-1 and a lower main shaft 1-2. The upper main shaft 1-1 and the lower main shaft 1-2 are connected by an automatic disengagement mechanism, which can automatically disconnect the transmission between the upper main shaft 1-1 and the lower main shaft 1-2.

[0029] The separation mechanism comprises a bottom-opened upper shell 2, the bottom surface of the upper shell 2 is rotatably installed on the top surface of a bottom-opened lower shell 3 through a bearing, the bottom surface of the inner wall of the lower shell 3 is fixedly installed on a vertical rod 4, the lower end of the vertical rod 4 is fixedly connected with the bottom surface of the inner wall of the lower shell 3, the upper end of the vertical rod 4 is integrally fixedly installed on a disc 5, the outer periphery of the vertical rod 4 is sleeved with a sliding sleeve 6, the bottom of the outer periphery of the sliding sleeve 6 is provided with an annular boss 7, the bottom surface of the disc 5 is provided with a plurality of grooves 8, the top surface of the sliding sleeve 6 is fixedly installed on a plurality of hemispherical protrusions 9 corresponding to the grooves 8, the protrusions 9 are respectively located in the corresponding grooves 8, the outer periphery of the sliding sleeve 6 is sleeved with a first circular ring 10 and a second circular ring 11, the top surface of the boss 7 is in contact with the bottom surface of the first circular ring 10, and the boss 7 applies an upward pressure on the bottom of the first circular ring 10, the first circular ring 10 and the second circular ring 11 are clamped through a limiting mechanism, the bottom of the outer periphery of the second circular ring 11 is rotatably connected with the inner wall of the upper shell 2 through a bearing, a plurality of first sliding grooves 12 arranged in an array are formed in the periphery of the inner wall of the upper shell 2, a first sliding block 13 is slidingly and fitly installed in each of the first sliding grooves 12, the inner side of the first sliding block 13 is fixedly connected with the outer periphery of the first circular ring 10, a plurality of second sliding grooves 14 arranged in an array are respectively formed in the outer periphery of the sliding sleeve 6, a second sliding block 15 is slidingly and fitly installed in each of the second sliding grooves 14, the outer side of the second sliding block 15 is fixedly connected with the inner wall of the second circular ring 11, the bottom surface of the first circular ring 10 is connected with the bottom surface of the inner wall of the upper shell 2 through a tension spring 16, one end of the tension spring 16 is fixedly connected with the bottom surface of the first circular ring 10, the other end of the tension spring 16 is fixedly connected with the bottom surface of the inner wall of the upper shell 2, the tension spring 16 applies a downward tension force on the first circular ring 10, the bottom surface of the sliding sleeve 6 is connected with the bottom surface of the inner wall of the lower shell 3 through a compression spring 17, one end of the compression spring 17 is fixedly connected with the bottom surface of the sliding sleeve 6, the other end of the compression spring 17 is fixedly connected with the bottom surface of the inner wall of the lower shell 3, the outer periphery of the second circular ring 11 is provided with a reverse driven mechanism, the upper shell 2 can drive the second circular ring 11 to synchronously rotate through the reverse driven mechanism when the upper shell 2 reversely rotates, the top surface of the upper shell 2 is fixedly connected with one end of an upper main shaft 1-1, the bottom surface of the lower shell 3 is fixedly connected with one end of a lower main shaft 1-2.The device in the normal working state, the upper spindle 1-1 drive and the connection with the upper shell 2 synchronous rotation, the upper shell 2 through the first slider 13 drive its inside first ring 10 rotation, the first ring 10 through the limiting mechanism drive second ring 11 rotation, the second ring 11 through the connection with the second slider 15 drive sleeve 6 synchronous rotation, the sleeve 6 through the convex block 9 and the recess 8 between the mutual cooperation drive disc 5 synchronous rotation, disc 5 through the connection with the vertical rod 4 drive lower shell 3 rotation, lower shell 3 drive and the connection with the lower spindle 1-2 synchronous rotation, so that the upper spindle 1-1, the upper shell 2, the lower shell 3, the lower spindle 1-2 can synchronous rotation; When the lower spindle 1-2 due to external force causes to stop rotation, the lower shell 3 connected with the lower spindle 1-2 stop rotation, at this time, the vertical rod 4, disc 5 cannot rotate, because the upper spindle 1-1 at this time is still normal rotation, therefore in the upper spindle 1-1 drive the upper shell 2, the first ring 10, the second ring 11, sleeve 6 continue to rotate, at this time the sleeve 6 top convex block 9 gradually away from the corresponding recess 8, the sleeve 6 is followed by moving down, at this time the compression spring 17 is further compressed, the first ring 10 under the action of the tension spring 16 moves down, make the first ring 10 and the second ring 11 separate, at this time the limiting mechanism connected with the first ring 10 and the second ring 11 is in failure state, the first ring 10 no longer drive the second ring 11 synchronous rotation, namely at this time the first ring 10 in the drive of the upper shell 2 idle, realize the upper spindle 1-1 drive the upper shell 2 rotation and the lower shell 3, the lower spindle 1-2 stop rotation effect; When reset, make the upper spindle 1-2 drive the upper shell 2 reverse rotation, the upper shell 2 through the reverse drive mechanism drive the second ring 11 reverse rotation, at the same time the upper shell 2 drive the first ring 10 synchronous reverse rotation, at this time the second ring 11 drive sleeve 6 reverse rotation, when the convex block 9 and the corresponding recess 8 alignment, the sleeve 6 moves up under the action of the compression spring 17 reset, the first ring 10 moves up under the action of the convex block 7 reset, at this time the convex block 9 into the corresponding recess 8, realize the reset and normal working state of the device; The device in the lower spindle 1-2 due to external force stuck, can disconnect the lower spindle 1-2 and the upper spindle 1-1 between the transmission, so as to avoid the spindle 1 bear torque too large and damage, improve the reliability of the spindle 1.

[0030] The reverse driven mechanism comprises tooth blocks 18, the outer periphery of the second ring 11 is provided with a plurality of strip-shaped grooves 19 arranged in an array, the number of the strip-shaped grooves 19 is the same as that of the first sliding grooves 12 and one-to-one correspondence, one end of the tooth block 18 is connected to the strip-shaped groove 19 through a torsion spring, the other end of the tooth block 18 is located in the corresponding first sliding groove 12, and the arrangement direction of all the tooth blocks 18 is the same as the positive rotation direction of the upper shell 2. The structure design can continuously press the tooth block 18 downward when the upper shell 2 continues to rotate in the positive direction when the second ring 11 is stationary, so that the tooth block 18 cannot hinder the rotation of the upper shell 2, and when the upper shell 2 rotates in the positive direction, the tooth block 18 is clamped into the corresponding first sliding groove 12, so that the upper shell 2 can drive the second ring 11 to rotate through the tooth block 18, and the different working states of the device are ensured.

[0031] The strip-shaped groove 19 is respectively fixedly installed with a limiting rod 20, the limiting rod 20 is in contact with the outer side of the corresponding tooth block 18, and the limiting rod 20 is arranged on the side close to the rotating end of the tooth block 18. The structure design can limit the tooth block 18, avoid the tooth block 18 from being folded outward at too large an angle and being disabled, and improve the reliability of the device.

[0032] The number of the first sliding grooves 12 is the same as that of the second sliding grooves 14, and the first sliding grooves 12 are oppositely arranged with the corresponding second sliding grooves 14. The structure design can ensure that after any first sliding groove 12 and any second sliding groove 14 are aligned, other first sliding grooves 12 can be aligned with the corresponding second sliding grooves 14, so that after the upper shell 2 and the sliding sleeve 6 slide relative to each other, the first sliding grooves 12 and the corresponding second sliding grooves 14 can be automatically aligned when the sliding sleeve 6 is reset, and the reliability of the device is improved.

[0033] The limiting mechanism comprises a clamping block 21, the top surface of the first ring 10 is provided with a plurality of clamping grooves 22 arranged in an annular array, the number of the clamping grooves 22 is the same as that of the first sliding grooves 12 and one-to-one correspondence, the bottom surface of the second ring 11 is fixedly installed with a plurality of clamping blocks 21 corresponding to the clamping grooves 22, and the clamping block 21 is located in and in contact with the corresponding clamping groove 22. The structure can ensure that the first ring 10 can drive the second ring 11 to rotate, and does not affect the normal separation of the first ring 10 and the second ring 11, and is simple in structure and convenient to use.

[0034] The top surface of the boss 7 is rotatably mounted with a ring-shaped gasket through a bearing. This structure design can reduce the friction when the boss 7 and the first ring 10 rotate relative to each other. When the sliding sleeve 6 and the boss 7 stop rotating and the first ring 10 continues to rotate, the gasket can rotate with the first ring 10 due to the clamping of the gasket between the boss 7 and the first ring 10. This avoids the mutual friction between the first ring 10 and the boss 7, avoids the wear of the first ring 10, and improves the reliability of the device.

[0035] The present application is used instead of the existing technology in which the main shaft of the mud scraper is installed in the sewage sedimentation tank (the mud scraper, the mud scraper main shaft and the sewage sedimentation tank all belong to the prior art, and their specific structure and working principle are not described in detail here). In use, the mud scraping plate is installed at the lower end of the lower main shaft 1-2, and the upper end of the upper main shaft 1-1 is connected in transmission with the power transmission structure of the mud scraper. When the device is working normally, the main shaft 1 rotates clockwise from top to bottom, which is forward rotation. When the mud scraping plate stops rotating due to excessive resistance, the automatic disengaging mechanism can automatically disconnect the transmission connection between the upper main shaft 1-1 and the lower main shaft 1-2, so that the upper main shaft 1-1 cannot drive the lower main shaft 1-2 to rotate, and the upper main shaft 1-1 is idling, thereby avoiding damage to the main shaft 1 due to excessive torque, and the upper main shaft 1-1 and the lower main shaft 1-2 can also be reset by the automatic disengaging mechanism to restore the transmission connection between the upper main shaft 1-1 and the lower main shaft 1-2 (the specific working principle is described in the specific embodiment). It is simple to operate and easy to use.

[0036] The device can prevent the power device connected with the main shaft 1 from being overloaded, and can greatly improve the reliability of the device.

[0037] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can modify the technical solutions described in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A protection mechanism of a sludge scraper of a sedimentation basin, comprising a main shaft (1) of the sludge scraper, characterized in that: The main shaft (1) is divided into an upper main shaft (1-1) and a lower main shaft (1-2), the upper main shaft (1-1) and the lower main shaft (1-2) are drivingly connected through an automatic disengaging mechanism, and the disengaging mechanism can automatically disconnect the driving connection between the upper main shaft (1-1) and the lower main shaft (1-2); The disengaging mechanism comprises an upper housing (2) with an open bottom, the bottom surface of the upper housing (2) is rotatably installed on the top surface of a lower housing (3) with an open top surface through a bearing, the bottom surface of the inner wall of the lower housing (3) is fixedly installed with a vertical rod (4), the upper end of the vertical rod (4) is integrally fixedly installed with a disc (5), the outer periphery of the vertical rod (4) is sleeved with a sliding sleeve (6), the bottom of the outer periphery of the sliding sleeve (6) is provided with an annular boss (7), the bottom surface of the disc (5) is provided with a plurality of grooves (8), the top surface of the sliding sleeve (6) is fixedly installed with a plurality of hemispherical protrusions (9) corresponding to the grooves (8), the protrusions (9) are respectively located in the corresponding grooves (8), the outer periphery of the sliding sleeve (6) is sleeved with a first circular ring (10) and a second circular ring (11), the top surface of the boss (7) is in contact with the bottom surface of the first circular ring (10), the first circular ring (10) and the second circular ring (11) are clamped through a limiting mechanism, the bottom of the outer periphery of the second circular ring (11) is rotatably connected with the inner wall of the upper housing (2) through a bearing, a plurality of first sliding grooves (12) arranged in an array are formed in the periphery of the inner wall of the upper housing (2), a first sliding block (13) is slidingly and movably installed in each first sliding groove (12), the inner side of the first sliding block (13) is fixedly connected with the outer periphery of the first circular ring (10), a plurality of second sliding grooves (14) arranged in an array are formed in the outer periphery of the sliding sleeve (6), a second sliding block (15) is slidingly and movably installed in each second sliding groove (14), the outer side of the second sliding block (15) is fixedly connected with the inner wall of the second circular ring (11), the bottom surface of the first circular ring (10) is connected with the bottom surface of the inner wall of the upper housing (2) through a tension spring (16), the bottom surface of the sliding sleeve (6) is connected with the bottom surface of the inner wall of the lower housing (3) through a compression spring (17), the outer periphery of the second circular ring (11) is provided with a reverse driven mechanism, the upper housing (2) can drive the second circular ring (11) to rotate synchronously through the reverse driven mechanism when the upper housing (2) reversely rotates, the top surface of the upper housing (2) is fixedly connected with one end of the upper main shaft (1-1), and the bottom surface of the lower housing (3) is fixedly connected with one end of the lower main shaft (1-2); The reverse driven mechanism comprises a tooth block (18), a plurality of strip-shaped grooves (19) arranged in an array are formed in the outer periphery of the second circular ring (11), one end of the tooth block (18) is rotatably connected with the strip-shaped grooves (19) through a torsion spring, and the other end of the tooth block (18) is located in the corresponding first sliding groove (12). The limiting mechanism comprises clamping blocks (21), the top surface of the first circular ring (10) is provided with a plurality of annularly arranged clamping grooves (22), the bottom surface of the second circular ring (11) is fixedly provided with a plurality of clamping blocks (21) corresponding to the clamping grooves (22), and the clamping blocks (21) are respectively located in the corresponding clamping grooves (22) and are in contact with the clamping grooves (22).

2. A protection mechanism for a sludge scraper of a sedimentation basin according to claim 1, characterized in that: A limiting rod (20) is fixedly arranged in each of the strip-shaped grooves (19), and the limiting rod (20) is in contact with the outer side of the corresponding tooth block (18).

3. A protection mechanism for a sludge scraper of a sedimentation basin according to claim 1, characterized in that: The first sliding grooves (12) and the second sliding grooves (14) are equal in number, and the first sliding grooves (12) are oppositely arranged with the corresponding second sliding grooves (14).

4. The protection mechanism of a sludge scraper of a sedimentation basin according to claim 1, characterized in that: The top surface of the boss (7) is rotatably provided with an annular gasket through a bearing.

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