Explosion-proof hydraulic cylinder structure

Abstract

The utility model discloses an explosion-proof type hydraulic cylinder structure, which relates to the technical field of hydraulic cylinders and comprises a main body, a movable pipe is arranged on the inner side of the main body, and limiting plates are fixedly connected to the outer surfaces of the two ends of the movable pipe. The assembly efficiency and the structure protection performance are effectively improved, continuous and reliable mechanical protection can be provided for a main body in the using process, in the control and driving aspects, the system conducts multi-section stroke control on the piston rod through the axial sliding characteristic of the two movable sleeves, and in the first stage, a medium is injected through a first liquid inlet hole to push the piston rod to move forwards; in the second stage, reverse sliding is achieved through a second liquid inlet hole to enable the piston rod to be pumped back, and in the third stage, media are injected through a third liquid inlet hole to promote the two movable sleeves to move forwards cooperatively, and final positioning or pressurizing and other complex operations are completed.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and in particular to an explosion-proof hydraulic cylinder structure. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy to perform linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, eliminates transmission backlash, and provides smooth movement. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] However, in the existing technology, the existing structure is prone to cross-flow of media in different channels due to unreliable sealing switching, which in turn interferes with the piston rod stroke control and affects the accuracy of equipment operation. Existing protective components may be fixed by welding or single bolts, which is cumbersome to install and has poor vibration resistance (it is easy to loosen under vibration conditions), causing the protective plate to fall off. Utility Model Content

[0004] The purpose of this invention is to solve the problem that existing structures are prone to cross-flow of media in different channels due to unreliable sealing switching, which in turn interferes with piston rod stroke control. Therefore, an explosion-proof hydraulic cylinder structure is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an explosion-proof hydraulic cylinder structure, comprising a main body, a movable tube provided inside the main body, limit plates fixedly connected to the outer surfaces of both ends of the movable tube, and a piston rod fixedly connected to the center of one end of the limit plate, one end of the piston rod penetrating the main body and slidably connected to the main body, a first movable sleeve sleeved on the outer surface of one end of the movable tube, and a second movable sleeve sleeved on the outer surface of the other end of the movable tube, and an explosion-proof mechanism installed on the outside of the main body;

[0006] The explosion-proof mechanism includes a protective plate, with sleeves on both sides of the protective plate and plug-in blocks fixedly connected to both ends of the protective plate. Sleeves are opened on the opposite side of the two protective plates, and plug-in grooves are opened on the inner side of the sleeves.

[0007] Preferably, one of the fixing rings is fixedly connected to the outer surface of the main body, and the other fixing ring is sleeved on the outer surface of the main body.

[0008] Preferably, the insertion slot is inserted into the insertion block, and a fixing ring is fixedly connected to the outer surface of one end of the insertion slot.

[0009] Preferably, a connecting screw passes through the two fixing rings, and nuts are threaded to both ends of the connecting screw.

[0010] Preferably, a second liquid inlet is provided on one side of the middle part of the main body, and a third liquid inlet is provided in the center of one side of the main body.

[0011] Preferably, a first liquid inlet hole is provided at one end of the main body, and a second liquid inlet hole is located between the first movable sleeve and the second movable sleeve.

[0012] Preferably, the first liquid inlet is located on one side of the first movable sleeve.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] 1. In this utility model, the stable connection between the protective plate and the fixed ring and sleeve is achieved through the cooperation of the plug-in block and the plug-in slot, which effectively improves the assembly efficiency and structural protection. During use, it can provide continuous and reliable mechanical protection for the main body. In terms of control and drive, the system uses the axial sliding characteristics of the two sets of movable sleeves to control the piston rod in multiple strokes. In the first stage, the medium is injected through the first liquid inlet to push the piston rod forward. In the second stage, the piston rod is pulled back by the reverse sliding through the second liquid inlet. In the third stage, the medium is injected through the third liquid inlet to make the two movable sleeves move forward together to complete complex operations such as final positioning or pressurization.

[0015] 2. In this utility model, the sliding fit between the limiting plate and the first and second movable sleeves enables effective control of the medium passage. During the extension and retraction of the piston rod, when the medium is injected through different inlet holes, the limiting plate automatically slides under the action of fluid pressure and fits against the end face of the corresponding movable sleeve to form a sealing barrier. This achieves the switching and blocking of the hydraulic path, preventing the medium from flowing between the movable sleeves and ensuring the stability and response accuracy of the piston rod stroke control. In addition, the protective structure adopts a connecting screw and nut fixing method, and the protective plate is reliably connected by passing through the mounting hole and fixing ring. This design improves assembly efficiency and enhances structural stability and vibration resistance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an explosion-proof hydraulic cylinder proposed in this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the explosion-proof mechanism in an explosion-proof hydraulic cylinder structure proposed in this utility model;

[0018] Figure 3 This is a schematic cross-sectional view of the main body of an explosion-proof hydraulic cylinder structure proposed in this utility model;

[0019] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the main body of an explosion-proof hydraulic cylinder structure proposed in this utility model.

[0020] Legend: 1. Main body; 11. First movable sleeve; 12. First liquid inlet; 13. Second liquid inlet; 14. Third liquid inlet; 15. Second movable sleeve; 2. Explosion-proof mechanism; 21. Fixing ring; 22. Sleeve; 23. Insertion groove; 24. Protective plate; 25. Connecting screw; 26. Insertion block; 3. Piston rod; 31. Limiting plate; 32. Movable tube. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] Example 1: As Figures 1-4 As shown, this utility model provides an explosion-proof hydraulic cylinder structure, including a main body 1. A movable tube 32 is provided inside the main body 1. Limiting plates 31 are fixedly connected to the outer surfaces of both ends of the movable tube 32. A piston rod 3 is fixedly connected to the center of one end of the limiting plate 31. One end of the piston rod 3 passes through the main body 1 and is slidably connected to the main body 1. A first movable sleeve 11 is sleeved on the outer surface of one end of the movable tube 32, and a second movable sleeve 15 is sleeved on the outer surface of the other end of the movable tube 32. An explosion-proof mechanism 2 is installed on the outside of the main body 1.

[0024] The explosion-proof mechanism 2 includes a protective plate 24. Both sides of the protective plate 24 are provided with sleeves 22, and both ends of the protective plate 24 are fixedly connected with plug blocks 26. Both protective plates 24 have sleeves 22 on opposite sides, and plug grooves 23 are provided inside the sleeves 22.

[0025] The specific setup and function of this embodiment are described below. During the protective operation, one end of the two protective plates 24 is first inserted into a corresponding insertion slot 23 at one end of a fixing ring 21 via its insertion block 26. This ensures a stable mechanical fit between the plate and the insertion slot 23 during insertion, thus completing the initial fixation. Next, another sleeve 22 is fitted onto the outer surface of the main body 1, and the insertion slot 23 on this sleeve 22 is accurately aligned and inserted with the insertion block 26 at the other end of the protective plate 24, thereby completing the tight splicing and sealing connection between the two sleeves 22 and the protective plate 24. This assembly method not only achieves the structural advantages of rapid assembly and disassembly but also effectively improves the overall protective performance of the external structure of the main body 1, providing stable, continuous, and reliable mechanical protection for the main body 1 during actual use.

[0026] When using the equipment for control and drive operations, the system relies on the axial sliding characteristics of the first movable sleeve 11 and the second movable sleeve 15 to achieve precise multi-stage stroke control of the piston rod 3. Specifically, during operation:

[0027] When the medium is injected through the first inlet hole 12, the internal pressure pushes the first movable sleeve 11 to slide towards the second movable sleeve 15, thereby causing the piston rod 3 to perform the first stroke, which is manifested as a forward thrusting action.

[0028] When the medium is injected into the system through the second inlet hole 13, the first movable sleeve 11 and the second movable sleeve 15 will move away from each other due to opposite forces, thereby realizing the second stroke, that is, the piston rod 3 performs a retraction action or reverse displacement.

[0029] When the medium is injected through the third inlet hole 14, the second movable sleeve 15 will be subjected to the pressure of the medium and slide towards the first movable sleeve 11. At the same time, it will push the first movable sleeve 11 to move forward synchronously, thereby jointly realizing the third stroke. This stroke can be used to complete the final positioning, pressurization or other complex working conditions.

[0030] Example 2: Figures 2-4 As shown, one fixing ring 21 is fixedly connected to the outer surface of the main body 1, and the other fixing ring 21 is sleeved on the outer surface of the main body 1. The insertion slot 23 is inserted into the insertion block 26, and a fixing ring 21 is fixedly connected to the outer surface of one end of the insertion slot 23. A connecting screw 25 passes through the two fixing rings 21, and nuts are threaded onto both ends of the connecting screw 25. A second liquid inlet hole 13 is provided on one side of the middle of the main body 1, and a third liquid inlet hole 14 is provided in the center of one side of the main body 1. A first liquid inlet hole 12 is provided at one end of the main body 1, and the second liquid inlet hole 13 is located between the first movable sleeve 11 and the second movable sleeve 15. The first liquid inlet hole 12 is located on one side of the first movable sleeve 11.

[0031] The overall effect of this embodiment is that, during the extension and retraction of the piston rod 3, the system effectively controls the medium passage through the relative sliding engagement between the limiting plate 31 and the first movable sleeve 11 and the second movable sleeve 15. When the medium is injected through the first inlet hole 12, the limiting plate 31 slides along the direction of the movable tube 32 under the drive of fluid pressure, eventually reaching and fitting against one end face of the inner cavity of the first movable sleeve 11. At this time, the limiting plate 31 forms a sealing barrier, effectively blocking the medium from continuing to flow along the internal channel of the first movable sleeve 11, thereby achieving the sealing effect of the channel and ensuring that the hydraulic path inside the system is distributed in a predetermined direction.

[0032] Similarly, when the medium is injected into the system through the third inlet port 14, the fluid pushes the limiting plate 31 at the other end of the movable tube 32 to move in the opposite direction until it comes into contact with the inner end of the second movable sleeve 15, forming a blockage. This structural design allows the movable tube 32 to have limiting plates 31 at both ends, enabling automatic sealing switching when different inlet ports are in operation. This effectively prevents the medium from flowing between the first movable sleeve 11 and the second movable sleeve 15, avoiding interference with the normal stroke control of the piston rod 3, and improving the operational stability and response accuracy of the entire hydraulic system.

[0033] Regarding the installation of the protective structure, to ensure a secure connection between the protective plate 24 and the fixed structure, connecting screws 25 are first installed at the opposite ends of the two fixing rings 21. After the connecting screws 25 pass through the pre-set mounting holes, they are tightened with nuts to ensure a reliable mechanical connection between the protective plate 24 and the fixing rings 21. This assembly method not only simplifies the installation process and improves work efficiency, but also enhances the overall stability and vibration resistance of the structure, providing an effective mechanical protection barrier for equipment operation.

[0034] The method of use and working principle of this device: When providing protection, insert one end of the two protective plates 24 into the insertion groove 23 of one end of one of the fixing rings 21, and then fit another sleeve 22 onto the outer surface of the main body 1, and insert the insertion groove 23 of the sleeve 22 into the insertion block 26 on the other side of the protective plate 24, thereby completing the splicing of the two sleeves 22 and the protective plate 24, and protecting the main body 1 during use.

[0035] During use, the piston rod 3 can be controlled to achieve three strokes by utilizing the sliding characteristics of the first movable sleeve 11 and the second movable sleeve 15. During this process, when the medium is introduced through the first liquid inlet hole 12, the first movable sleeve 11 will move towards the second movable sleeve 15; when the medium is introduced through the second liquid inlet hole 13, the first movable sleeve 11 and the second movable sleeve 15 will move away from each other; when the medium is introduced through the third liquid inlet hole 14, the second movable sleeve 15 will push the first movable sleeve 11 to move, and the second movable sleeve 15 will move towards the first movable sleeve 11.

[0036] When the piston rod 3 extends or retracts, the limiting plate 31 slides relative to the first movable sleeve 11 and the second movable sleeve 15 respectively. When the medium is introduced through the first inlet hole 12, the limiting plate 31 moves to one end of the inner cavity of the first movable sleeve 11, thereby sealing the first movable sleeve 11. When the medium is introduced through the third inlet hole 14, the limiting plate 31 at the other end of the movable tube 32 seals the second movable sleeve 15. In this way, the limiting plates 31 at both ends of the movable tube 32 can prevent the medium from flowing out from the inside of the first movable sleeve 11 and the second movable sleeve 15, thus affecting the normal stroke.

[0037] When installing the protective plate 24, install connecting screws 25 at both ends of the two fixing rings 21, and then lock them with nuts to complete the assembly of the protective plate 24 and the two fixing rings 21.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An explosion-proof hydraulic cylinder structure comprising a main body (1), characterized in that: The main body (1) is provided with a movable tube (32) inside. Both ends of the movable tube (32) are fixedly connected to a limiting plate (31). A piston rod (3) is fixedly connected to the center of one end of the limiting plate (31). One end of the piston rod (3) passes through the main body (1) and is slidably connected to the main body (1). A first movable sleeve (11) is sleeved on the outer surface of one end of the movable tube (32), and a second movable sleeve (15) is sleeved on the outer surface of the other end of the movable tube (32). An explosion-proof mechanism (2) is installed on the outside of the main body (1). The explosion-proof mechanism (2) includes a protective plate (24), with sleeves (22) provided on both sides of the protective plate (24), and plug-in blocks (26) fixedly connected to both ends of the protective plate (24). Sleeves (22) are provided on the opposite side of the two protective plates (24), and plug-in grooves (23) are provided on the inner side of the sleeves (22).

2. The explosion-proof hydraulic cylinder structure according to claim 1, characterized in that: One of the fixing rings (21) is fixedly connected to the outer surface of the main body (1), and the other fixing ring (21) is sleeved on the outer surface of the main body (1).

3. The explosion-proof hydraulic cylinder structure according to claim 1, characterized in that: The insertion slot (23) is inserted into the insertion block (26), and a fixing ring (21) is fixedly connected to the outer surface of one end of the insertion slot (23).

4. The explosion-proof hydraulic cylinder structure according to claim 3, characterized in that: A connecting screw (25) passes through the two fixing rings (21), and nuts are threaded to both ends of the connecting screw (25).

5. The explosion-proof hydraulic cylinder structure according to claim 1, characterized in that: The main body (1) has a second liquid inlet hole (13) on one side of the middle part, and a third liquid inlet hole (14) is opened in the center of one side of the main body (1).

6. The explosion-proof hydraulic cylinder structure according to claim 5, characterized in that: The main body (1) has a first liquid inlet hole (12) at one end, and the second liquid inlet hole (13) is located between the first movable sleeve (11) and the second movable sleeve (15).

7. The explosion-proof hydraulic cylinder structure according to claim 6, characterized in that: The first liquid inlet (12) is located on one side of the first movable sleeve (11).

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