Guide vane synchronizing ring yoke plate pin anti-falling device

Abstract

The utility model discloses an anti-falling device for a guide vane synchronizing ring yoke plate pin, which is characterized in that a pin anti-falling bolt is connected with the yoke plate pin, and a plurality of components are cooperated to limit the pin anti-falling bolt, so that the yoke plate pin is prevented from climbing up or falling down, and the safety and the reliability of a unit are improved; the pin anti-falling and anti-creeping locking device comprises a pin anti-falling and anti-creeping locking plate, mounting lugs are arranged on the two sides of the pin anti-falling and anti-creeping locking plate and fixedly connected with an upper yoke plate through bolts, and a containing groove used for containing the upper end of a yoke plate pin is formed in the middle of the bottom of the pin anti-falling and anti-creeping locking plate. A groove hole penetrating through the pin anti-falling and anti-climbing locking plate is formed in the center of the containing groove, a support is arranged on the inner side of the groove hole, support shaft grooves are formed in the two sides of the support, a first plane thrust bearing and a second plane thrust bearing are arranged on the two sides of the support respectively, an open hole is formed in the center of the support, and the open hole is communicated with the shaft grooves in the two sides respectively. A pin anti-falling bolt is arranged in the open hole and penetrates through the open hole to be in threaded connection with the yoke plate pin.

Description

Technical Field

[0001] This utility model relates to the field of hydropower station maintenance technology, and in particular to a device for preventing the pins of the guide vane synchronous ring plate from falling off. Background Technology

[0002] The synchronization ring of the guide vane mechanism of Units 4 and 5 at the Fuchunjiang Power Plant consists of 16 sets of external connecting plates, 16 sets of internal connecting plates, and pins connecting the connecting plates. This structure faces severe challenges during the long-term operation of the units. In particular, the pins connecting the internal connecting plates to the guide vane crank arms, due to their tapered pin design, are crucial to the safe operation of the units in terms of stability and reliability.

[0003] However, with the long-term operation of the unit, the bearing bush of the inner connecting plate pin hole wears continuously, causing the gap between the pin and the hole to gradually increase. This increased gap poses a risk that the pin will slowly fall downwards, seriously threatening the safe operation of the unit. To address this problem, the power plant once used a method of machining a groove around the top of the pin and fixing a locking piece next to the pin hole to prevent the pin from moving downwards.

[0004] However, this method did not completely solve the problem. During the operation of the synchronizing ring, the inner connecting plate and the guide vane crank arm rotate relative to each other, and the pin rotates accordingly. Due to the large gap between the pin and the hole, the pin gradually moves upward or downward during rotation, as if being "unscrewed" or "screwed out" like a bolt. When the pin's downward or upward movement becomes severe, it continuously wears down the locking plate until it completely loses its function, and the pin eventually slowly falls out of the pin hole.

[0005] This pin detachment phenomenon can not only lead to unit shutdown but also potentially cause more serious safety accidents. Therefore, developing a device that can effectively prevent the pins of the guide vane synchronization ring plate from detaching is particularly important. This device needs to overcome the limitations of existing locking plates to ensure that the pins remain stable throughout long-term operation, thereby guaranteeing the safe operation of the unit. Utility Model Content

[0006] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by disclosing a guide vane synchronous ring connecting plate pin anti-fall device. Through the connection between the pin anti-fall bolt and the connecting plate pin, multiple components work together to limit the pin anti-fall bolt, thereby preventing the connecting plate pin from climbing up or falling down, and improving the safety and reliability of the unit.

[0007] The technical solution adopted by this utility model to solve its technical problem is: a guide vane synchronous ring connecting plate pin anti-drop device, including a pin anti-fall and anti-climb locking plate. The pin anti-fall and anti-climb locking plate has mounting ears on both sides and is fixedly connected to the upper connecting plate by bolts. The bottom middle position of the pin anti-fall and anti-climb locking plate has a receiving groove for accommodating the upper end of the connecting plate pin. The center position of the receiving groove has a slot hole that penetrates the pin anti-fall and anti-climb locking plate. The inner side of the slot hole has a bracket. The two sides of the bracket have bracket shaft grooves. The bracket shaft grooves are respectively provided with a first planar thrust bearing and a second planar thrust bearing. The center of the bracket has an opening that communicates with the shaft grooves on both sides. The opening has a pin anti-fall bolt, which passes through the opening and is threadedly connected to the connecting plate pin.

[0008] In a preferred embodiment of this utility model, the top of the slot is provided with an anti-climbing pressure plate, which is fixedly connected to the pin anti-fall and anti-climbing locking plate by bolts.

[0009] In a preferred embodiment of this utility model, the bracket is welded to the inside of the slot.

[0010] In a preferred embodiment of this utility model, the two sides of the pin anti-fall bolt are respectively in contact with the plane of the first planar thrust bearing and the second planar thrust bearing.

[0011] In a preferred embodiment of this utility model, the bracket shaft groove includes a bracket shaft and a bearing groove. Bearing grooves are respectively provided on both sides of the bracket, and the bracket shaft is provided in the bearing groove. The bracket shafts on both sides are used to fit and fix the lower rings of the first planar thrust bearing and the second planar thrust bearing. The bearing groove is connected to the opening.

[0012] In a preferred embodiment of this utility model, the bottom of the anti-climbing pressure plate is provided with a rubber pad.

[0013] In a preferred embodiment of this utility model, the length of the receiving groove is greater than the diameter of the connecting plate pin, and the diameter of the opening is greater than the diameter of the pin anti-fall bolt.

[0014] This utility model has the following advantages compared with the prior art:

[0015] This guide vane synchronous ring connecting plate pin anti-fall-off device aims to solve the problem of the pin connecting the inner connecting plate and the guide vane auxiliary crank arm in the water guide mechanism of Units 4 and 5 of Fuchunjiang Power Plant falling off due to long-term wear. Through a unique structural design, the device ensures that the pin remains stable during long-term operation and prevents it from falling off, thereby ensuring the safe operation of the unit.

[0016] The pin-type anti-fall and anti-climb locking plate has mounting ears on both sides, which are fixedly connected to the upper connecting plate by bolts to ensure the stability of the locking plate during unit operation. A receiving groove is opened at the bottom center of the locking plate to accommodate the upper end of the connecting plate pin. The size of the receiving groove matches the upper end of the connecting plate pin, ensuring that the upper part of the pin can be tightly embedded in the groove. A through-hole is provided at the center of the receiving groove, and a bracket is installed within the slot. Support shaft grooves are provided on both sides of the bracket for installing a flat thrust bearing. The shaft groove is equipped with a first planar thrust bearing and a second planar thrust bearing respectively. The upper ring of the planar thrust bearing is engaged with the pin anti-fall bolt. The upper ring of the planar thrust bearing can rotate freely, while the lower ring is locked with the shaft groove of the bracket to ensure that the pin anti-fall bolt can rotate smoothly. An opening is provided at the center of the bracket, which is connected to the shaft grooves on both sides. The pin anti-fall bolt is provided in the opening. The pin anti-fall bolt passes through the opening and is threadedly connected to the connecting plate pin. Through the threaded connection, the pin anti-fall bolt can firmly fix the connecting plate pin and prevent it from falling.

[0017] When the connecting plate pin tends to droop due to long-term wear, the pin anti-fall bolt is used to firmly fix the pin to the locking plate through a threaded connection. Since the pin anti-fall bolt and the connecting plate pin are connected by threads, and the bearing design allows the pin anti-fall bolt to rotate smoothly, when the synchronizing ring moves and the inner connecting plate and the guide vane auxiliary crank arm rotate relative to each other, the pin will also rotate, but it will not move up or down. The entire device is fixedly connected to the upper connecting plate by bolts, ensuring the stability during unit operation. At the same time, the use of bearings reduces wear and friction, and improves the reliability of the device.

[0018] In summary, this guide vane synchronous ring connecting plate pin anti-fall-off device, through its unique structural design, effectively solves the problem of pin sagging due to long-term wear, thereby improving the safety and reliability of the unit. Attached Figure Description

[0019] Figure 1 This is an installation diagram of the present invention;

[0020] Figure 2 This is an exploded view of the present invention;

[0021] Figure 3 This is a top view of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Pin anti-fall and anti-climb locking plate; 2. Anti-climb lifting plate; 3. First plane thrust bearing; 4. Second plane thrust bearing; 5. Bracket; 6. Bracket shaft groove; 7. Pin anti-fall bolt. Detailed Implementation

[0024] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples:

[0025] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0026] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0027] like Figures 1-3 The figure shows a specific embodiment of the present invention;

[0028] In the specific implementation of this invention, the pin anti-fall and anti-climb locking plate is connected to the upper connecting plate by two M10*25 fixing bolts. Two planar thrust bearings are respectively installed in the bracket shaft grooves on both sides. The lower ring of the bearing is locked with the bracket shaft, and the upper ring of the bearing can rotate freely. The M14*50 pin anti-fall bolt passes through the opening and is tightened with the connecting plate pin. Thread locking glue is applied to the bolt to prevent the bolt from loosening. The existing screw holes above the connecting plate pin are used for connection, which is convenient for on-site installation. The anti-climb lifting plate is fixed to the pin anti-fall and anti-climb locking plate by two M5*10 bolts. When the connecting plate in the synchronous ring rotates relative to the guide vane auxiliary crank arm, the connecting plate pin rotates accordingly. When the pin attempts to climb, it will be blocked by the anti-climb lifting plate; when the pin attempts to move downward, it will be blocked by the bracket. Since the upper ring of the planar thrust bearing can rotate together with the M14*50 pin anti-fall bolt, the M14*50 pin anti-fall bolt will not be twisted and broken when rotating in the tightening direction.

[0029] It should be noted that when the M14*50 pin anti-fall bolt is in direct contact with the bracket without a corresponding planar thrust bearing, the M14*50 pin anti-fall bolt will be subjected to a counterclockwise torque when the pin rotates counterclockwise. However, the bracket will not rotate. When the bolt is pressed against the bracket, the bracket will transmit a clockwise torque to the bolt. The M14*50 pin anti-fall bolt is subjected to the torques of both forces over a long period of time and is very prone to breakage.

[0030] like Figures 1-3As shown, this utility model discloses a guide vane synchronous ring connecting plate pin anti-drop device, including a pin anti-fall and anti-climb locking plate 1. The pin anti-fall and anti-climb locking plate 1 has mounting ears on both sides and is fixedly connected to the upper connecting plate by bolts. The bottom center of the pin anti-fall and anti-climb locking plate 1 has a receiving groove for accommodating the upper end of the connecting plate pin. The center of the receiving groove has a slot hole that penetrates the pin anti-fall and anti-climb locking plate 1. The inner side of the slot hole is provided with a bracket 5. The two sides of the bracket 5 have bracket shaft grooves 6. The bracket shaft grooves 6 are respectively provided with a first planar thrust bearing 3 and a second planar thrust bearing 4. The center of the bracket 5 has an opening that communicates with the shaft grooves on both sides. The opening is provided with a pin anti-fall bolt 7, which passes through the opening and is threadedly connected to the connecting plate pin.

[0031] Preferred, such as Figures 1-2 As shown,

[0032] The top of the slot is provided with an anti-climbing pressure plate 2, which is fixedly connected to the pin anti-fall and anti-climbing locking plate 1 by bolts.

[0033] Based on the original guide vane synchronous ring plate pin anti-drop device, an anti-climbing pressure plate 2 is added to the top of the slot and fixedly connected to the pin anti-fall and anti-climbing locking plate 1 with bolts, which further enhances the device's function of preventing the pin from climbing.

[0034] Its position is set at the top of the slot in the anti-climbing pressure plate 2, at a critical location on the possible upward path of the pin. It can directly block the upward movement of the pin's anti-fall bolt. It is fixedly connected to the pin's anti-fall and anti-climb locking plate 1 by bolts. This connection method is simple, reliable, and easy to install and disassemble. When maintenance or replacement of the anti-climbing pressure plate is required, simply loosen the bolts.

[0035] The anti-climbing pressure plate 2 directly covers the top of the slot, forming a physical barrier. When the pin is subjected to an upward force and attempts to climb out of the slot, the anti-climbing pressure plate will first contact the pin's anti-fall bolt, preventing the pin's anti-fall bolt from continuing to move upward, thus effectively preventing the pin from climbing up the connecting plate.

[0036] Working in conjunction with other components such as the anti-fall bolt and the receiving groove, the fixing effect of the anti-fall bolt is further enhanced. The anti-fall bolt mainly prevents the pin from falling or climbing up from the axial and threaded connection aspects. The receiving groove and the bracket limit the pin from the axial and radial directions, respectively, while the anti-climbing pressure plate provides additional resistance to the pin climbing up, making the fixing of the anti-fall bolt more secure.

[0037] In hydropower stations, preventing pins from climbing up is crucial for ensuring the normal operation of equipment. The design of anti-climb pressure plates greatly improves the reliability of the device in preventing pins from climbing up, and reduces the risk of equipment failure and safety accidents caused by pin climbing up.

[0038] In summary, the anti-climbing pressure plate 2 added to the top of the slot plays an important role in preventing the pin from climbing up through its unique structure and connection method, further improving the reliability and safety of the guide vane synchronous ring plate pin anti-drop device.

[0039] Preferred, such as Figures 1-2 As shown,

[0040] The bracket 5 is welded to the inside of the slot.

[0041] The bracket is welded to the inside of the slot to ensure a tight fit between the bracket and the inner wall of the slot. The weld can withstand various forces and vibrations generated during equipment operation, avoiding problems such as weld cracking and detachment.

[0042] The bracket, serving as the support structure for the anti-fall bolt, is welded inside the slot to provide a stable mounting base for the bolt. During equipment operation, the anti-fall bolt is subjected to various external forces. The bracket, fixed inside the slot by welding, ensures that the anti-fall bolt remains in the correct position, stably supporting the pin and preventing it from falling due to loosening.

[0043] When the pin is subjected to a large force, the bracket can distribute the force to the inner wall of the slot, preventing excessive localized stress that could lead to deformation or damage to the slot. Simultaneously, the welded connection between the bracket and the inner wall of the slot enhances the load-bearing capacity of the entire structure, improving the stability and reliability of the device.

[0044] The bracket has bracket shaft grooves on both sides, in which a first planar thrust bearing and a second planar thrust bearing are respectively installed. After the bracket is welded to the inside of the groove, the bearings can rotate flexibly within the groove, allowing the bracket to adapt to forces acting on the pin in different directions. For example, when the equipment is running, the pin anti-fall bolt may be subjected to radial vibration or impact. The upper ring of the planar thrust bearing can rotate with the pin anti-fall bolt, thus preventing the bolt from breaking when rotating in the tightening direction, ensuring that the pin anti-fall bolt is always in the correct position.

[0045] In some complex operating conditions, the operating status of the equipment may change constantly, and the force on the anti-fall bolts will also change accordingly. The fit between the bracket and the bearing, as well as the structural design of welding inside the slot, enable the device to adapt to these dynamic changes and maintain good anti-fall performance at all times.

[0046] Furthermore, the bracket is welded to the inside of the slot, forming a robust integrated structure with the pin anti-fall and anti-climb locking plate. This integrated structure improves the device's vibration and impact resistance, reducing the possibility of the pin loosening or falling off due to equipment vibration or impact.

[0047] By welding the bracket to the pin-operated anti-fall and anti-climb locking plate, the stability of the device is further enhanced. During long-term operation, this maintains the structural integrity and performance stability of the device, extending its service life. The welded connection offers high strength and stability, effectively preventing loosening of the bracket during operation. In contrast, bolted connections may loosen due to vibration, impact, or other factors, affecting the normal use of the device. In the long run, welding reduces maintenance and replacement costs caused by loosening or damage.

[0048] Preferred, such as Figures 1-2 As shown,

[0049] The two sides of the anti-fall bolt 7 are respectively in contact with the first planar thrust bearing 3 and the second planar thrust bearing 4.

[0050] The pin anti-fall bolt 7 has two sides that are in planar contact with the first planar thrust bearing 3 and the second planar thrust bearing 4, respectively. This planar contact method makes the contact area between the pin anti-fall bolt and the bearing relatively large, which can transmit force and distribute pressure more evenly, avoiding wear and damage caused by excessive local stress.

[0051] The function of a thrust bearing is to transform the sliding friction between the anti-fall bolt and the bracket into rolling friction. When the connecting plate pin is subjected to external force and the anti-fall bolt tends to move relative to it, the thrust bearing can roll on both sides of the anti-fall bolt, greatly reducing frictional resistance. For example, during equipment operation, the connecting plate pin may experience slight displacement due to vibration. Without a thrust bearing, the sliding friction between the anti-fall bolt and the bracket would cause significant wear on the bolt and also affect the pin's flexibility. With a thrust bearing, this rolling friction effectively reduces wear and extends the service life of both the bolt and the bracket.

[0052] After reducing frictional resistance, the anti-fall bolt can more flexibly adapt to the movement of the connecting plate pin. When the connecting plate pin is subjected to forces in different directions, the anti-fall bolt can adjust its position through the rolling of the plane bearing to maintain stable support for the connecting plate pin, enabling the device to better adapt to various operating conditions during equipment operation.

[0053] The anti-fall bolt's two sides are in contact with the plane of the flat bearing, allowing the force on the bolt to be evenly distributed across the two bearings. This uniform force distribution prevents bearing damage or anti-fall bolt deformation due to excessive localized stress. For example, when the connecting plate pin is subjected to a large tensile force, the force is evenly transmitted to the bracket through the flat bearing, ensuring the stability of the anti-fall bolt's support for the pin.

[0054] During the operation of hydropower station equipment, the force on the connecting pins is constantly changing, and the anti-fall bolts need to continuously adjust their position to adapt to these changes. The planar contact connection of the flat bearing allows the bolt to rotate and move flexibly within a certain range, ensuring that the bolt always acts perpendicularly on the connecting pin, providing a stable fixing force. For example, when the equipment starts or stops, the pin will be subjected to a large impact force. The anti-fall bolts can adjust their position through the rolling and rotation of the flat bearing, preventing bolt damage or pin detachment due to sudden changes in force.

[0055] The stress on the pin varies under different operating conditions. The combination of a flat bearing and the anti-fall bolt adapts to these different conditions, ensuring the device functions normally under various circumstances. Whether operating under high or low load, the flat bearing provides stable support and flexible movement for the anti-fall bolt, ensuring the pin remains securely fixed.

[0056] Preferred,

[0057] The bracket shaft groove 6 includes a bracket shaft and a bearing groove. Bearing grooves are respectively opened on both sides of the bracket 5. The bracket shaft is provided in the bearing groove. The bracket shafts on both sides are used to fit and fix the lower rings of the first planar thrust bearing 3 and the first planar thrust bearing 4. The bearing groove is connected to the opening.

[0058] Support shaft groove structure: The support shaft groove 6 consists of a support shaft and a bearing groove. Bearing grooves are respectively provided on both sides of the support 5, and the support shaft is housed within the bearing grooves. The support shaft serves to position and support the bearings. The support shafts on both sides are used to mount and fix the lower rings of the first planar thrust bearing 3 and the second planar thrust bearing 4, respectively. The bearings can be accurately installed on the support, and the upper rings of the first planar thrust bearing 3 and the second planar thrust bearing 4 can rotate freely on the support shaft. Simultaneously, the bearing grooves are connected to the openings, allowing the anti-fall bolt 7 to pass through the openings and connect with the connecting plate pin, and to move flexibly under the support of the bearings.

[0059] The bracket shaft's placement within the bearing groove provides precise positioning for the bearing. During assembly, the bearing can be accurately fitted onto the bracket shaft, ensuring the relative positional relationship between the bearing and the bracket.

[0060] The support shaft provides stable support for the bearing, enabling it to withstand the forces from the anti-fall bolts and connecting plate pins. When the equipment is running, the pins are subjected to various external forces, which are transmitted to the bearings through the anti-fall bolts. The support shaft ensures that the bearings remain stable under these forces, preventing displacement or shaking, thus guaranteeing the normal operation of the entire anti-fall device.

[0061] The design of the bearing groove connecting to the opening allows the anti-fall bolt to form a good fit with the bearing when passing through the opening. When the anti-fall bolt is subjected to external force and undergoes relative movement, the bearing can rotate flexibly on the support shaft, reducing friction between the bolt and the support. This rolling friction method, replacing sliding friction, greatly reduces frictional resistance and improves the operating efficiency of the device.

[0062] During equipment operation, the force on the connecting plate pin is constantly changing, and the anti-fall bolt needs to continuously adjust its position to adapt to these changes. The flexible rotation of the bearing allows the anti-fall bolt to move freely within a certain range, ensuring that the bolt always acts perpendicularly on the connecting plate pin, providing a stable fixing force. For example, when the equipment is subjected to vibration or impact, the rotation of the bearing can buffer these forces, preventing the bolt from being damaged due to uneven stress.

[0063] Preferred,

[0064] The bottom of the anti-climbing pressure plate 2 is equipped with a rubber pad.

[0065] The bottom of the anti-climbing pressure plate 2 is equipped with a rubber pad. The rubber pad is usually firmly fixed to the bottom of the anti-climbing pressure plate by means of bonding, embedding or pressing. Its installation position is precisely corresponding to the area that the anti-fall bolt may come into contact with when it climbs up, so as to ensure that it can play a role as soon as possible when the anti-fall bolt has an upward trend.

[0066] Rubber pads possess a certain degree of elasticity. When the pin is subjected to a sudden upward impact, the rubber pad can elastically deform, buffering this impact force. This not only reduces direct impact damage to the pin and the anti-climbing pressure plate but also dissipates the pin's upward climbing energy during the buffering process, further reducing the likelihood of the pin climbing. For example, when equipment starts or stops, the pin may generate a large impact force due to inertia, making the elastic buffering effect of the rubber pad particularly important.

[0067] The rubber pad acts as a buffer layer between the anti-climbing pressure plate and the pin, preventing direct metal-to-metal contact. During long-term equipment operation, direct metal-to-metal contact easily leads to wear, causing a decrease in the surface finish of the pin anti-fall bolts and the anti-climbing pressure plate, and may even cause equipment failure. The rubber pad effectively reduces this wear, extending the service life of the pin and the anti-climbing pressure plate.

[0068] Rubber pads have excellent shock absorption and noise reduction properties. When the pin moves within the slot, it may generate some vibration and noise. Rubber pads can absorb and attenuate these vibrations and noises, making the equipment operate more smoothly and quietly.

[0069] Preferred, such as Figures 1-3 As shown,

[0070] The length of the receiving groove is greater than the diameter of the connecting plate pin, and the diameter of the opening is greater than the diameter of the pin anti-fall bolt 7.

[0071] 1. The length of the receiving groove is greater than the diameter of the connecting pin, primarily to provide ample space for the installation and normal operation of the connecting pin. During installation, the connecting pin needs to be smoothly placed into the receiving groove. During equipment operation, the connecting pin may experience slight displacement due to vibration, thermal expansion, etc. The extra length of the receiving groove can accommodate these displacements, ensuring that the pin is not restricted or damaged due to insufficient space. When the equipment is subjected to impact or vibration, the extra length of the receiving groove can act as a buffer. The connecting pin has a certain amount of room to move within the receiving groove, which can absorb some of the impact force and reduce damage to the pin itself. At the same time, it also avoids equipment failure caused by the pin directly impacting the receiving groove wall.

[0072] In actual manufacturing, both the connecting pin and the receiving groove may have certain dimensional errors. The design of having a receiving groove length greater than the diameter of the connecting pin can tolerate these errors, ensuring that the pin can be installed and used normally, thus improving the versatility and reliability of the device.

[0073] 2. The opening diameter is larger than the diameter of the pin-support bolt to ensure that the pin-support bolt can pass smoothly through the opening and connect with the connecting plate pin. During installation, if the opening size is too small, the bolt may have difficulty passing through due to excessive frictional resistance, and may even be damaged. A larger opening diameter can reduce installation difficulty and improve installation efficiency.

[0074] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

[0075] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. A device for preventing the pins of a guide vane synchronous ring plate from falling off, characterized in that, The device includes a pin anti-fall and anti-climb locking plate (1). The pin anti-fall and anti-climb locking plate (1) has mounting ears on both sides and is fixedly connected to the upper connecting plate by bolts. The bottom middle position of the pin anti-fall and anti-climb locking plate (1) has a receiving groove for accommodating the upper end of the connecting plate pin. The center position of the receiving groove has a slot hole that penetrates the pin anti-fall and anti-climb locking plate (1). The inner side of the slot hole has a bracket (5). The two sides of the bracket (5) have bracket shaft grooves (6). The bracket shaft grooves (6) are respectively provided with a first planar thrust bearing (3) and a second planar thrust bearing (4). The center of the bracket (5) has an opening that communicates with the shaft grooves on both sides. The opening has a pin anti-fall bolt (7) that passes through the opening and is threadedly connected to the connecting plate pin.

2. The guide vane synchronous ring plate pin anti-detachment device as described in claim 1, characterized in that, The top of the slot is provided with an anti-climbing pressure plate (2), which is fixedly connected to the pin anti-fall and anti-climbing locking plate (1) by bolts.

3. The guide vane synchronous ring plate pin anti-detachment device as described in claim 2, characterized in that, The bracket (5) is welded to the inside of the slot.

4. A guide vane synchronous ring plate pin anti-detachment device as described in claim 2 or 3, characterized in that, The two sides of the anti-fall bolt (7) are respectively connected to the first planar thrust bearing (3) and the second planar thrust bearing (4) in planar contact.

5. The guide vane synchronous ring plate pin anti-detachment device as described in claim 4, characterized in that, The bracket shaft groove (6) includes a bracket shaft and a bearing groove. The bracket (5) has bearing grooves on both sides. The bearing groove has a bracket shaft inside. The bracket shafts on both sides are used to fit and fix the lower rings of the first planar thrust bearing (3) and the second planar thrust bearing (4). The bearing groove is connected to the opening.

6. The guide vane synchronous ring plate pin anti-detachment device as described in claim 5, characterized in that, The bottom of the anti-climbing pressure plate (2) is provided with a rubber pad.

7. The guide vane synchronous ring plate pin anti-detachment device as described in claim 6, characterized in that, The length of the receiving groove is greater than the diameter of the connecting plate pin, and the diameter of the opening is greater than the diameter of the pin anti-fall bolt (7).

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