Fire grate hydraulic cylinder with lug ring connecting structure

Abstract

The utility model relates to the technical field of fire grate hydraulic cylinders, in particular to a fire grate hydraulic cylinder with a lug ring connecting structure. The fire grate hydraulic cylinder with the lug ring connecting structure comprises a cylinder body, a lug ring and a piston rod, the piston rod is arranged in the cylinder body and provided with a connecting end extending out of the cylinder body, and the fire grate hydraulic cylinder further comprises a connector which is arranged between the piston rod and the lug ring and can be detachably connected. The connector is divided into a first split connector and a second split connector in the moving direction of the piston rod, limiting clamping grooves are formed in the opposite faces of the first split connector and the second split connector in a matched mode respectively, and the connecting end and the connecting head of the lug ring are located and assembled in the limiting clamping grooves. According to the technical scheme, under the arrangement of the split type connector, detachable connection between the piston rod and the lug ring can be conveniently achieved, when the hydraulic cylinder needs to be replaced, forcible entry is not needed, and the maintenance and replacement time can be remarkably shortened.

Description

Technical Field

[0001] This disclosure relates to the field of grate hydraulic cylinder technology, and in particular to a grate hydraulic cylinder with an ear-ring connection structure. Background Technology

[0002] The grate hydraulic cylinder is a core actuator in thermal energy equipment such as waste incinerators and biomass boilers. Driven by hydraulic pressure, it achieves actions such as raising, lowering, and pushing the grate, directly affecting combustion efficiency and pollutant emission control. The structure of a grate hydraulic cylinder generally includes an clevis, a cylinder body, and a piston rod located within the cylinder body. The end of the piston rod extending out of the cylinder body connects to the clevis. In conventional technology, the connection between the piston rod and the clevis is mostly a threaded connection—that is, the piston rod and the clevis are connected through mating internal and external threads.

[0003] The main drawbacks of threaded connections are as follows: Due to the harsh environment in which grate hydraulic cylinders are used, they are mainly used in grate systems of waste incinerators or coal-fired boilers. These devices generate high temperatures, high pressures, vibrations, and dust during operation. When the hydraulic cylinder needs to be replaced during maintenance, the threaded connection often gets stuck due to rust, wear, and dust contamination. This usually requires dismantling, i.e., destructive removal, which significantly increases the labor costs of maintenance and the cost of replacing spare parts. Summary of the Invention

[0004] This disclosure aims to address at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, this disclosure provides a grate hydraulic cylinder with an ear ring connection structure, including a cylinder body, an ear ring, and a piston rod, wherein the piston rod is disposed in the cylinder body and has a connecting end extending out of the cylinder body;

[0006] It also includes a connector that can be detachably connected between the piston rod and the earring. The connector is divided into a first split connector and a second split connector along the moving direction of the piston rod. The first split connector and the second split connector are respectively provided with limiting slots on their opposite surfaces. The limiting slots provided on the first split connector and the second split connector together form a limiting hole. The connecting end and the connecting head of the earring are positioned and fitted in the limiting hole.

[0007] In one feasible implementation, the connecting end includes the outer end of the piston rod and a first limiting head extending radially along the outer end, the connecting head including a reduced diameter end disposed at the end of the earring and a second limiting head extending radially along the reduced diameter end.

[0008] In one possible implementation, the connecting end is configured as a T-shaped end, and the connecting head is configured as a T-shaped head.

[0009] In one feasible implementation, the limiting slot is formed in a symmetrical arrangement on the first split connector and the second split connector.

[0010] In one feasible implementation, the limiting slot includes a first slot and a second slot. The first slots on the first split connector and the second split connector cooperate to form a first limiting hole for positioning the fitting connection end. The second slots on the first split connector and the second split connector cooperate to form a second limiting hole for positioning the fitting connection head.

[0011] In one feasible implementation, the first limiting hole and the second limiting hole are spaced apart and connected by a connecting hole, and the inner diameter of the connecting hole is smaller than the inner diameter of the large-diameter hole on the adjacent limiting hole.

[0012] In one feasible implementation, the first split connector and the second split connector are respectively provided with matching connecting bolt holes, and the first split connector and the second split connector are also respectively provided with matching positioning pin holes.

[0013] In one feasible implementation, a travel limit rod is fastened to the connector. The travel limit rod is parallel to the movement direction of the piston rod. A forward positioning adjustment block is installed at the rear end of the travel limit rod, and a backward positioning adjustment block is installed at the front end of the travel limit rod. A forward positioning switch that can abut against the forward positioning adjustment block and a backward positioning switch that can abut against the backward positioning adjustment block are installed on the cylinder body next to the travel limit rod.

[0014] In one feasible implementation, a support guide post is installed on the cylinder body, and the support guide post is provided with a guide through hole along the piston rod moving direction for the stroke limit rod to move.

[0015] Compared with the prior art, this disclosure has at least the following beneficial effects: The connector of this disclosure is provided with a limiting slot, and the connecting end and the connecting head of the earring can be positioned and fitted in the limiting slot. The connector is set in a split configuration, and the two split parts can be disassembled and connected, thereby facilitating the disassembly of the piston rod and the earring, thereby facilitating the replacement of the hydraulic cylinder, significantly shortening the maintenance and replacement time, and effectively reducing maintenance labor costs and spare parts replacement and usage costs. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 This is a three-dimensional structural diagram of the present disclosure;

[0020] Figure 2 This is a schematic cross-sectional view of the structure disclosed herein;

[0021] Figure 3 This is an enlarged schematic diagram of the first split connector of this disclosure.

[0022] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows: Cylinder 1, Earring 2, Connector 21, Reduced Diameter End 22, Second Limiting Head 23; Piston Rod 3, Connecting End 31, Outer End 32, First Limiting Head 33; Connector 4, First Split Connector 41, Second Split Connector 42; Limiting Slot 5, First Groove 51, Second Groove 52, Connecting Hole 6, Large Diameter Hole 7, Connecting Bolt 8, Positioning Pin 9, Stroke Limiting Rod 10, Forward Position Adjustment Block 11, Reverse Position Adjustment Block 12, Forward Position Switch 13, Reverse Position Switch 14, Support Guide Post 15. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0024] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0025] Currently, piston rods and lugs are mainly connected by threads. Threaded connections rely on the matching internal and external threads between the piston rod and lugs. In harsh environments, when the hydraulic cylinder needs to be replaced during maintenance, the threaded connection may jam, requiring disassembly. This results in long maintenance and replacement times, high labor costs, and high costs for replacing and using spare parts.

[0026] Based on this, the present disclosure provides a grate hydraulic cylinder with an earring connection structure. The connector of the present disclosure is provided with a limiting slot formed by a limiting slot. The connecting end and the connecting head of the earring can be positioned and fitted in the limiting slot. The connector is set in a split configuration, and the two split parts can be detached and connected, thereby facilitating the disassembly of the piston rod and the earring. This facilitates the replacement of the hydraulic cylinder, significantly reduces maintenance and replacement time, and effectively reduces maintenance labor costs and spare parts replacement and usage costs.

[0027] The following is a detailed description of the grate hydraulic cylinder with an earring connection structure through specific embodiments:

[0028] Reference Figures 1 to 3 As shown, this disclosure provides a grate hydraulic cylinder with an earring connection structure, including a cylinder body 1, an earring 2, and a piston rod 3. The piston rod 3 is disposed within the cylinder body 1 and has a connecting end 31 extending out of the cylinder body 1. The grate hydraulic cylinder also includes a connector 4 that can be detachably connected between the piston rod 3 and the earring 2. The connector 4 is divided into a first split connector 41 and a second split connector 42 along the moving direction of the piston rod 3. Limiting grooves 5 are respectively provided on the opposite surfaces of the first split connector 41 and the second split connector 42. The limiting grooves 5 provided on the first split connector 41 and the second split connector 42 together form a limiting hole. The connecting end 31 and the connecting head 21 of the earring 2 are positioned and fitted in the limiting hole.

[0029] Specifically, in this embodiment, the connector 4 is preferably arranged in half along the moving direction of the piston rod 3, whereby one half forms the first split connector 41 and the other half forms the second split connector 42. Furthermore, the limiting slots 5 provided on the first split connector 41 and the second split connector 42 are also symmetrically arranged and have the same size, shape and structure, thereby constructing a half connector. Because it has two halves, the half connector has advantages in manufacturing. It can be formed in one process and can be closed and spliced ​​into a whole. It can also be easily opened, making it particularly suitable for detachable connection in special working conditions.

[0030] In some embodiments, the limiting slot 5 includes a first slot 51 and a second slot 52. The first slot 51, which is mated on the first split connector 41 and the second split connector 42, together form a first limiting hole (unmarked) for positioning the mating connection end 31. The second slot 52, which is mated on the first split connector 41 and the second split connector 42, together form a second limiting hole (unmarked) for positioning the mating connection head 21. (Reference) Figure 3 The first tank 51 is located on the left side, and the second tank 52 is located on the right side.

[0031] In this embodiment, the first limiting hole is jointly formed by the first groove 51 that is fitted on the first split connector 41 and the second split connector 42, and the second limiting hole is jointly formed by the second groove 52 that is fitted on the second split connector 41 and the second split connector 42. When positioning and installing the connecting end 31 and the connector 21, taking the removal of the second split connector 42 from the first split connector 41 as an example, at this time, half of the connecting end 31 along the moving direction of the piston rod 3 can be easily inserted into the first groove 51 of the first split connector 41, and half of the connector 21 along the moving direction of the piston rod 3 can be easily inserted into the second groove 52 of the first split connector 41. The second split connector 42 can then be easily fitted onto the other half of the connecting end 31 and the connector 21 along the moving direction of the piston rod 3 using its first groove 51 and second groove 52. The assembly process is convenient and fast.

[0032] In some embodiments, the connecting end 31 includes the outer end 32 of the piston rod 3 and a first limiting head 33 extending radially along the outer end 32, and the connecting head 21 includes a reduced diameter end 22 disposed at the end of the earring 2 and a second limiting head 23 extending radially along the reduced diameter end 22.

[0033] In this embodiment, the outer diameter of the constructed first limiting head 33 is larger than the outer diameter of the outer end 32. Through the setting of this large-diameter structure, i.e., the first limiting head 33, the axial limiting effect can be achieved, satisfying the axial positioning and fitting of the connecting end 31 in the first limiting hole, and preventing it from coming out of the first limiting hole. The outer diameter of the constructed second limiting head 23 is larger than the outer diameter of the reduced-diameter end 22. Through the setting of this large-diameter structure, i.e., the second limiting head 23, the axial limiting effect can be achieved, satisfying the axial positioning and fitting of the connecting head 21 in the second limiting hole, and preventing it from coming out of the second limiting hole.

[0034] In some embodiments, the outer end 32 of the connecting end 31 and the first limiting head 33 may be constructed into a cylindrical, square, or prismatic structure, and the present disclosure preferably uses a cylindrical structure that is easy to process and form; the reduced diameter end 22 of the connecting head 21 and the second limiting head 23 may be constructed into a cylindrical, square, or prismatic structure, and the present disclosure preferably uses a cylindrical structure that is easy to process and form; furthermore, the connecting end 31 is formed into a T-shaped end, and the connecting head 21 is constructed into a T-shaped head, selecting a structure that is easy to process and form, and the matching limiting hole is also easy to form.

[0035] In some embodiments, the first limiting hole and the second limiting hole are spaced apart and connected by a connecting hole 6, and the inner diameter of the connecting hole 6 is smaller than the inner diameter of the large-diameter hole 7 on the adjacent limiting hole.

[0036] In this embodiment, a small-diameter connecting hole 6 is used for communication. It can be understood that the connecting hole 6 is also formed in half and correspondingly located on the respective split connectors. On the one hand, this facilitates the processing of the first groove 51 and the second groove 52 in a connected state on the respective split connectors. Compared to a groove with a fully enclosed inner end, the through groove of this application is easier to process and form. On the other hand, it ensures that the first groove 51 and the second groove 52 on the respective split connectors are not directly connected by equal diameters. After the small-diameter connecting hole 6 is set, the first groove 51 is used for positioning and mounting the first limiting head 3. The inner end of the groove of the first limiting head 33 forms a limiting baffle, thereby achieving the blocking and limiting of the end of the first limiting head 33. The inner end of the groove of the second groove 52 used for positioning and mounting the second limiting head 23 also forms a limiting baffle, thereby achieving the blocking and limiting of the end of the second limiting head 33. Thus, the two limiting heads can be limited and positioned in their respective grooves without contacting each other. Therefore, there is no need to set an elastic spacer in the small diameter connection hole 6 to buffer and separate the two limiting heads, reducing the number of components. In addition, since the elastic spacer is a consumable, the use of this consumable is eliminated, which can reduce the replacement cost.

[0037] In some embodiments, the first split connector 41 and the second split connector 42 are respectively provided with mating connecting bolt holes (unmarked), and the first split connector 41 and the second split connector 42 are also respectively provided with mating positioning pin holes (unmarked).

[0038] In this embodiment, tightening the connecting bolt 8 into the connecting bolt hole enables the connection of the two split connectors. After inserting the positioning pin 9 into the positioning pin hole, the hydraulic cylinder involved in this disclosure has a thrust of 20-30 tons during use (industry convention defines "ton" to represent the magnitude of thrust). During the back-and-forth pushing process, there is a strong shearing force. The positioning pin 9 can prevent the two split connectors from being displaced relative to each other, thereby avoiding shear damage to the connecting bolt.

[0039] In some embodiments, a travel limit rod 10 is fastened to the connector 4. The travel limit rod 10 is parallel to the moving direction of the piston rod 3. A forward positioning adjustment block 11 is installed at the rear end of the travel limit rod 10, and a backward positioning adjustment block 12 is installed at the front end of the travel limit rod 10. A forward positioning switch 13 that can abut against the forward positioning adjustment block 11 and a backward positioning switch 14 that can abut against the backward positioning adjustment block 12 are installed on the cylinder 1 next to the travel limit rod 10.

[0040] In this embodiment, after the piston rod 3 reaches its forward position, the forward position adjustment block 11 reaches the forward position switch 13 and is stopped by the forward position switch 13. The forward position switch 13, which is electrically connected to the system controller (not shown), sends a forward position signal to the system controller. Upon receiving the signal, the system controller controls the piston rod 3 of the grate hydraulic cylinder to stop advancing. After the piston rod 3 retracts to its backward position, the retract position adjustment block 12 reaches the retract position switch 14 and is stopped by the retract position switch 14. At this time, the retract position switch 14, which is electrically connected to the system controller (not shown), sends a retract position signal to the system controller. Upon receiving the signal, the system controller controls the piston rod 3 of the grate hydraulic cylinder to stop retracting.

[0041] In some embodiments, a support guide post 15 is installed on the cylinder body 1, and the support guide post 15 is provided with a guide through hole (not marked) along the moving direction of the piston rod 3 for the stroke limit rod 10 to move.

[0042] In this embodiment, the support guide post 15 provides support for the stroke limit rod 10 while also providing guidance, so that the stroke limit rod 10 can move smoothly along the moving direction of the piston rod 3.

[0043] This invention avoids disassembly when overhauling and replacing hydraulic cylinders, and can effectively shorten the overhaul and replacement time. According to the comparison of the effects before and after actual use, the overhaul and replacement time can be shortened from the original 10 hours of disassembly to 2 hours after the improvement of this invention.

[0044] In this disclosure, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0045] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The above are merely preferred embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A grate hydraulic cylinder with an earring connection structure, characterized in that, It includes a cylinder body, an ear ring, and a piston rod, wherein the piston rod is disposed in the cylinder body and has a connecting end that extends out of the cylinder body; The grate hydraulic cylinder also includes a connector that can be detachably connected between the piston rod and the lug. The connector is divided into a first split connector and a second split connector along the moving direction of the piston rod. Limiting slots are respectively provided on the opposite surfaces of the first split connector and the second split connector. The limiting slots provided on the first split connector and the second split connector together form a limiting hole. The connecting end and the connecting head of the lug are positioned and fitted in the limiting hole.

2. The grate hydraulic cylinder with an earring connection structure according to claim 1, characterized in that, The connecting end includes the outer end of the piston rod and a first limiting head extending radially along the outer end. The connecting head includes a reduced diameter end disposed at the end of the earring and a second limiting head extending radially along the reduced diameter end.

3. The grate hydraulic cylinder with an earring connection structure according to claim 2, characterized in that, The connecting end is configured as a T-shaped end, and the connecting head is configured as a T-shaped head.

4. The grate hydraulic cylinder with an earring connection structure according to claim 1 or 3, characterized in that, The limiting slot includes a first slot and a second slot. The first slots on the first split connector and the second split connector cooperate to form a first limiting hole for positioning and fitting the connecting end. The second slots on the first split connector and the second split connector cooperate to form a second limiting hole for positioning and fitting the connecting head.

5. The grate hydraulic cylinder with an earring connection structure according to claim 4, characterized in that, The first and second limiting holes are spaced apart and connected by a connecting hole, and the inner diameter of the connecting hole is smaller than the inner diameter of the large-diameter hole on the adjacent limiting hole.

6. The grate hydraulic cylinder with an earring connection structure according to claim 1, characterized in that, The first split connector and the second split connector are respectively provided with matching connecting bolt holes, and the first split connector and the second split connector are also respectively provided with matching positioning pin holes.

7. The grate hydraulic cylinder with an earring connection structure according to claim 1, characterized in that, A travel limit rod is fastened to the connector. The travel limit rod is parallel to the moving direction of the piston rod. A forward positioning adjustment block is installed at the rear end of the travel limit rod, and a backward positioning adjustment block is installed at the front end of the travel limit rod. A forward positioning switch that can abut against the forward positioning adjustment block and a backward positioning switch that can abut against the backward positioning adjustment block are installed on the cylinder body next to the travel limit rod.

8. The grate hydraulic cylinder with an earring connection structure according to claim 7, characterized in that, The cylinder body is equipped with a support guide column, and the support guide column is provided with a guide through hole along the piston rod moving direction for the stroke limit rod to move.

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