A double stroke oil cylinder

Abstract

The utility model relates to hydraulic pressure oil cylinder technical field, concretely is a double -stroke oil cylinder, including cylinder body, piston rod, middle part piston, pressure ring and guide bush, one end of cylinder body is provided with first oil port, the other end is provided with third oil port, the second oil port is arranged between first oil port and third oil port, the side of cylinder body is provided with first earring, the piston rod is arranged in cylinder body, the middle part piston passes through piston rod and is movably arranged in cylinder body, the utility model can reduce the equipment oil cylinder quantity, realizes the oil cylinder when working simultaneously, and the pressure stability and the synchronism of movement are realized, and the working efficiency is improved, and the equipment volume is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically a double-stroke cylinder. Background Technology

[0002] Coking generally refers to the process of carbonizing and turning organic matter into coke, and in coal dry distillation, it refers to high-temperature dry distillation. In petroleum processing, coking is short for residue coking, which refers to the process by which heavy oils (such as heavy oil, vacuum residue, cracked residue, and even bituminous asphalt) undergo deep cracking and condensation reactions at high temperatures of around 500℃ to produce gases, gasoline, diesel, wax oil, and petroleum coke. Coking mainly includes five processes: delayed coking, batch coking, open-hearth coking, fluidized bed coking, and flexible coking.

[0003] The equipment in the coking plant requires multiple hydraulic cylinders to achieve the required operation. However, when multiple hydraulic cylinders work simultaneously, it is easy to cause unstable pressure and uncoordinated movement. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides a double-stroke hydraulic cylinder, which can reduce the number of hydraulic cylinders in the equipment, so as to achieve stable pressure and synchronous movement when the hydraulic cylinders work simultaneously, thereby improving work efficiency and reducing the size of the equipment.

[0005] To achieve the above objectives, the present invention provides a double-stroke hydraulic cylinder, comprising a cylinder body, a piston rod, a central piston, a pressure ring, and a guide sleeve. One end of the cylinder body has a first oil port, and the other end has a third oil port. A second oil port is located between the first and third oil ports. A first lug is provided on one side of the cylinder body. The piston rod is disposed within the cylinder body. The central piston passes through the piston rod and is movably disposed within the cylinder body. The pressure ring passes through the piston rod and is disposed on the other side of the cylinder body. The guide sleeve is disposed within the cylinder body on the side near the pressure ring.

[0006] Furthermore, the cylinder body includes an upper tube and a lower tube, the inner diameter of the lower tube is larger than the outer diameter of the upper tube, the upper tube and the lower tube are connected by an insertion, and the end face of the upper tube is close to the edge of the second oil port.

[0007] Furthermore, the central piston is provided with a flange, the outer diameter of which is larger than the inner diameter of the upper tube.

[0008] Furthermore, a top piston is provided on one side of the piston rod, and a second earring is provided on the other side of the piston rod.

[0009] Furthermore, the cylinder body includes a first rod chamber, a second rod chamber, and a rodless chamber. The cavity formed between the top piston and the middle piston is the first rod chamber, and the cavity formed between the middle piston and the guide sleeve is the second rod chamber.

[0010] Furthermore, the central piston is movably disposed within the second rod chamber.

[0011] Furthermore, a sealing arrangement is provided between the piston rod and the pressure ring.

[0012] Furthermore, a sealing arrangement is provided between the piston rod and the guide sleeve.

[0013] Furthermore, a sealing arrangement is provided between the piston rod and the central piston.

[0014] The beneficial effects of this utility model are as follows: This utility model relates to hydraulic cylinders that can reduce the number of cylinders in the equipment, so as to achieve stable pressure and synchronous movement when the cylinders work simultaneously, thereby improving work efficiency, reducing equipment size, reducing costs, and increasing work efficiency. Attached Figure Description

[0015] Figure 1 This is a diagram showing the working state of the second and third oil ports of this utility model.

[0016] Figure 2 This is a diagram showing the working state of the first oil port of this utility model;

[0017] Figure 3 This is a diagram showing the working state of the second oil port of this utility model;

[0018] Figure 4 This is a diagram showing the working state of the third oil port of this utility model;

[0019] In the diagram: 100, cylinder block; 110, upper barrel; 120, lower barrel; 130, first oil port; 140, second oil port; 150, third oil port; 160, first lug; 170, first rod chamber; 180, second rod chamber; 190, rodless chamber.

[0020] 200. Piston rod; 210. Top piston; 220. Second earring.

[0021] 300. Middle piston; 310. Flange.

[0022] 400, guide sleeve,

[0023] 500, pressure ring. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] like Figure 1 As shown, one embodiment of this utility model discloses a double-stroke hydraulic cylinder, including a cylinder body 100, a piston rod 200, a central piston 300, a pressure ring 500, and a guide sleeve 400. One end of the cylinder body 100 is provided with a first oil port 130, and the other end is provided with a third oil port 150. A second oil port 140 is provided between the first oil port 130 and the third oil port 150. A first lug 160 is provided on one side of the cylinder body 100. The piston rod 200 is disposed within the cylinder body 100. The central piston 300 passes through the piston rod 200 and is movably disposed within the cylinder body 100. The pressure ring 500 passes through the piston rod 200 and is disposed on the other side of the cylinder body 100. The guide sleeve 400 is disposed within the cylinder body 100 on the side near the pressure ring 500.

[0026] It should be noted that the total stroke length of piston rod 200 is 150+65mm, and the maximum stroke length of the middle piston 300 is L2, where L2≤65.

[0027] In one embodiment, the cylinder body 100 includes an upper tube body 110 and a lower tube body 120. The inner diameter of the lower tube body 120 is larger than the outer diameter of the upper tube body 110. The upper tube body 110 and the lower tube body 120 are connected by insertion. The end face of the upper tube body 110 is close to the edge of the second oil port 140.

[0028] Furthermore, the middle piston 300 is provided with a flange 310, the outer diameter of which is larger than the inner diameter of the upper tube 110.

[0029] In one embodiment of the above-mentioned double-stroke hydraulic cylinder, when the third oil port 150 is working or when the second oil port 140 and the third oil port 150 are working at the same time, the flange 310 of the middle piston 300 contacts the end face of the upper tube 110 near the edge of the second oil port 140, and the end face of the upper tube 110 plays a limiting role for the middle piston 300.

[0030] In one embodiment, a top piston 210 is provided on one side of the piston rod 200, and a second earring 220 is provided on the other side of the piston rod 200.

[0031] It should be noted that the total length of the maximum stroke of the top piston 210 is L1, where L1 ≤ 150 + 65.

[0032] In one embodiment, the inner cavity of the cylinder 100 includes a first rod chamber 170, a second rod chamber 180, and a rodless chamber 190. The cavity formed between the top piston 210 and the middle piston 300 is the first rod chamber 170, the cavity formed between the middle piston 300 and the guide sleeve 400 is the second rod chamber 180, and the cavity formed between the top piston 210 and the first oil port 130 is the rodless chamber 190.

[0033] Furthermore, the central piston 300 is movably disposed within the second rod chamber 180.

[0034] In one embodiment, a sealing arrangement is provided between the piston rod 200 and the pressure ring 500.

[0035] In one embodiment, a sealing arrangement is provided between the piston rod 200 and the guide sleeve 400.

[0036] In one embodiment, a sealing arrangement is provided between the piston rod 200 and the central piston 300.

[0037] It should be noted that the sealing device in the above embodiment is preferably a sealing ring.

[0038] See Figure 1 In the above-mentioned double-stroke hydraulic cylinder, when the second oil port 140 and the third oil port 150 are working, pressure oil is introduced into both the first rod chamber 170 and the second rod chamber 180. The position of the top piston 210 remains unchanged and is in contact with the top of the upper tube 110. The position of the middle piston 300 remains unchanged and is in contact with the tail end face of the upper tube 110. The hydraulic cylinder is in the initial state (starting position).

[0039] See Figure 2 Furthermore, when the first oil port 130 is working, pressurized oil is introduced into the rodless chamber 190, the top piston 210 moves 150+65 strokes, the top piston 210 contacts one side of the middle piston 300, the middle piston 300 moves 65 strokes in the second rod chamber 180, the other side of the middle piston 300 contacts the guide sleeve 400, the piston rod 200 exits 150+65 strokes, and the oil cylinder extends (end position).

[0040] See Figure 3 Furthermore, when the second oil port 140 is working, pressurized oil is introduced into the first rod chamber 170, the top piston 210 moves back 150 strokes, the distance between the top piston 210 and the middle piston 300 is 150 strokes, the position of the middle piston 300 remains unchanged, the piston rod 200 retracts 150 strokes, and the oil cylinder performs a retraction movement (retraction stroke 150).

[0041] See Figure 4Preferably, when the third oil port 150 is working, pressurized oil is introduced into the second rod chamber 180, and the middle piston 300 and the tail piston both move back 65 strokes. The middle piston 300 contacts the tail end face of the upper tube 110, the piston rod 200 retracts 65 strokes, and the oil cylinder performs a retraction movement (retraction stroke 65).

[0042] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

Claims

1. A double-stroke hydraulic cylinder, characterized in that: include The cylinder body has a first oil port at one end and a third oil port at the other end. A second oil port is provided between the first oil port and the third oil port. A first lug is provided on one side of the cylinder body. The piston rod is disposed within the cylinder body; The central piston is movably disposed within the cylinder body, passing through the piston rod. A pressure ring passes through the piston rod and is disposed on the other side of the cylinder; A guide sleeve is disposed in the cylinder body on the side near the pressure ring.

2. A double-stroke hydraulic cylinder according to claim 1, characterized in that: The cylinder body includes an upper tube and a lower tube. The inner diameter of the lower tube is larger than the outer diameter of the upper tube. The upper tube and the lower tube are connected by an insertion joint. The end face of the upper tube is close to the edge of the second oil port.

3. A double-stroke hydraulic cylinder according to claim 2, characterized in that: The central piston is provided with a flange, and the outer diameter of the flange is larger than the inner diameter of the upper tube.

4. A double-stroke hydraulic cylinder according to claim 1, characterized in that: A top piston is provided on one side of the piston rod, and a second earring is provided on the other side of the piston rod.

5. A double-stroke hydraulic cylinder according to claim 4, characterized in that: The cylinder body includes a first rod chamber, a second rod chamber, and a rodless chamber. The cavity formed between the top piston and the middle piston is the first rod chamber, and the cavity formed between the middle piston and the guide sleeve is the second rod chamber.

6. A double-stroke hydraulic cylinder according to claim 5, characterized in that: The central piston is movably disposed within the second rod chamber.

7. A double-stroke hydraulic cylinder according to claim 1, characterized in that: The piston rod and the pressure ring are sealed together.

8. A double-stroke hydraulic cylinder according to claim 1, characterized in that: The piston rod and the guide sleeve are sealed together.

9. A double-stroke hydraulic cylinder according to claim 1, characterized in that: The piston rod is sealed to the middle piston.

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