Combined profiled hydraulic cylinder

Abstract

The application relates to a combined special-shaped hydraulic cylinder, which comprises three hydraulic cylinders, namely a first hydraulic cylinder, a second hydraulic cylinder and a third hydraulic cylinder, which are used for driving a first actuating mechanism, a second actuating mechanism and a third actuating mechanism respectively, the second hydraulic cylinder and the third hydraulic cylinder are coaxially arranged, the axis of the first hydraulic cylinder is parallel to the axes of the second hydraulic cylinder and the third hydraulic cylinder, the first hydraulic cylinder is arranged on one side of the second hydraulic cylinder and the third hydraulic cylinder, the first hydraulic cylinder comprises a first piston rod, the second hydraulic cylinder comprises a second piston rod, the third hydraulic cylinder comprises a third piston rod, the second piston rod is a hollow structure, and at least a part of the third piston rod is slidably arranged in the second piston rod.

Description

Technical Field

[0001] This invention relates to a combined irregular-shaped hydraulic cylinder, specifically to a combined irregular-shaped hydraulic cylinder for use in the nuclear power field that drives multiple actuators. Background Technology

[0002] In the nuclear power industry, hydraulic cylinders are required to simultaneously compress and shear materials. Due to the special application scenarios in the nuclear power industry, high requirements are placed on the size and reliability of hydraulic equipment.

[0003] As disclosed in prior art CN106925827A, an underwater hydraulic shearing device for spent fuel-related components includes a shearing head, a hydraulic cylinder, and a fixed long rod. The hydraulic cylinder is bolted to the fixed long rod, and the shearing head is bolted to the hydraulic cylinder. The shearing head includes a fixed blade, a body, a moving blade, a guide rod, and a transition plate. The upper end of the transition plate is bolted to the hydraulic cylinder, and the lower end is connected to the body. The transition plate has a through hole. The body is rectangular with an arc-shaped guide groove. The guide rod is installed in the arc-shaped guide groove of the body. The guide rod is cylindrical, and its upper end is connected to the piston rod of the hydraulic cylinder through a male-female joint structure. The moving blade is bolted to the lower end of the guide rod. The moving blade is rectangular and located above the fixed blade.

[0004] The aforementioned prior art CN106925827A defines the main components of the hydraulic shearing device, but does not disclose the specific structure of the hydraulic cylinder. Based on the structure of this hydraulic shearing device, it can be inferred that the hydraulic cylinder has a relatively simple function and cannot achieve the ideal material handling effect.

[0005] Another existing technology, CN211391812U, discloses a mechanism that uses a hydraulic cylinder to achieve a cutting operation. Specifically, it describes a fully automatic horizontal baling machine equipped with a wire binding mechanism. The baling machine has a wire threading mechanism and a binding mechanism on both sides of its baling cavity, arranged opposite to each other. The binding mechanism includes at least a wire cutting unit, comprising a cutting cylinder, a first cutting blade, and a second cutting blade. The first and second cutting blades are close to each other and arranged parallel to each other. The first cutting blade is connected to the cutting piston rod of the cutting cylinder, and the second cutting blade is fixed to the binding mechanism support frame. The first cutting blade can be driven by the cutting cylinder to achieve relative movement with the second cutting blade, thereby completing the cutting of the wire fed between the two blades by the wire threading mechanism. Through the structural design of the wire binding mechanism in this baling machine, the wire fed into the binding mechanism after the material package is wrapped can be automatically and solidly cut.

[0006] However, the aforementioned existing technologies are not well applicable to the application environment of this invention. Summary of the Invention

[0007] The purpose of this application is to solve the above-mentioned technical problems and propose a combined irregular hydraulic cylinder.

[0008] To achieve the above objectives, this application proposes a combined non-standard hydraulic cylinder, comprising three hydraulic cylinders: a first hydraulic cylinder, a second hydraulic cylinder, and a third hydraulic cylinder, respectively used to drive a first actuator, a second actuator, and a third actuator. The second and third hydraulic cylinders are coaxially arranged, the axis of the first hydraulic cylinder is parallel to the axes of the second and third hydraulic cylinders, the first hydraulic cylinder is located on one side of the second and third hydraulic cylinders, the first hydraulic cylinder includes a first piston rod, the second hydraulic cylinder includes a second piston rod, and the third hydraulic cylinder includes a third piston rod. The second piston rod is a hollow structure, and at least a portion of the third piston rod is slidably located inside the second piston rod.

[0009] Furthermore, both the first piston rod and the third piston rod are hollow structures, and the front ends of the first piston rod and the third piston rod are respectively used to connect the first actuator and the third actuator. The front end of the third piston rod is slidably located inside the second piston rod.

[0010] Furthermore, both the first piston rod and the third piston rod are provided with screws inside, and the two screws are respectively fixed to the rear ends of the first piston rod and the third piston rod, while the first actuator and the third actuator are respectively fixed to the front ends of the two screws.

[0011] Furthermore, a connecting flange is provided at the front end of the second piston rod, and the second actuator is connected to the second piston rod through the connecting flange.

[0012] Furthermore, the first hydraulic cylinder, the second hydraulic cylinder, and the third hydraulic cylinder are all double-piston rod structures.

[0013] Furthermore, the combined special-shaped hydraulic cylinder also includes a front cylinder liner and a rear cylinder liner, the front cylinder liner being connected to the rear cylinder liner, both the front and rear cylinder liners including an upper cavity and a lower cavity, the first hydraulic cylinder being located in the upper cavity of the rear cylinder liner, the second hydraulic cylinder being located in the lower cavity of the front cylinder liner, and the third hydraulic cylinder being located outside the rear cylinder liner.

[0014] Furthermore, it also includes a first anti-rotation mechanism and a second anti-rotation mechanism, which are respectively disposed at the rear end of the first hydraulic cylinder and the rear end of the third hydraulic cylinder, and are used to prevent the first piston rod and the third piston rod from rotating.

[0015] Furthermore, the first anti-rotation mechanism includes a first anti-rotation shaft and a first anti-rotation slider, and the second anti-rotation mechanism includes a second anti-rotation shaft and a second anti-rotation slider. The first anti-rotation shaft is fixed to the rear cylinder liner, and the first anti-rotation slider is fixed to the first piston rod. The first anti-rotation slider can slide along the first anti-rotation shaft.

[0016] The second anti-rotation shaft is fixed to the cylinder body of the third hydraulic cylinder, and the second anti-rotation slider is fixed to the third piston rod. The second anti-rotation slider can slide along the second anti-rotation shaft. Furthermore, a third anti-rotation mechanism is also included, comprising a guide rod and a sensor mounting cylinder. The guide rod is fixed to the connecting flange, and the sensor mounting cylinder is fixed to the front cylinder liner. The guide rod can slide within the sensor mounting cylinder.

[0017] Furthermore, displacement sensor mounting sleeves are respectively provided at the rear ends of the first anti-rotation shaft and the second anti-rotation shaft, and magnetic rings are provided on the first anti-rotation slider and the second anti-rotation slider. The displacement sensor mounting sleeves and the magnetic rings together realize the displacement measurement function.

[0018] Furthermore, a displacement sensor mounting sleeve is provided at the rear end of the sensor mounting cylinder, and a magnetic ring is provided at the rear end of the guide rod. The displacement sensor mounting sleeve and the magnetic ring together realize the displacement measurement function.

[0019] Furthermore, it also includes a first stroke detection mechanism, a second stroke detection mechanism, and a third stroke detection mechanism, which are respectively located near the rear end of the first hydraulic cylinder, the front end of the second hydraulic cylinder, and the rear end of the third hydraulic cylinder.

[0020] Furthermore, the first stroke detection mechanism includes a first limit switch mounting bracket and a first lever, the first limit switch mounting bracket being fixed to the rear cylinder liner, and the first lever being fixed to the first anti-rotation slider.

[0021] The second stroke detection mechanism includes a second stroke switch mounting bracket and a second lever. The second stroke switch mounting bracket is fixed to the front cylinder liner, and the second lever is fixed to the guide rod.

[0022] The third stroke detection mechanism includes a third stroke switch mounting bracket and a third lever. The third stroke switch mounting bracket is fixed to the cylinder body of the third hydraulic cylinder, and the third lever is fixed to the second anti-rotation slider.

[0023] Furthermore, the first limit switch mounting bracket, the second limit switch mounting bracket, and the third limit switch mounting bracket are each equipped with two or more limit switches, which, together with the three levers, realize the special position detection function.

[0024] Furthermore, each of the three hydraulic cylinders includes a piston and an end cap. The piston is located inside the hydraulic cylinder body and around the piston rod. The end cap is fixed to the rear end of the hydraulic cylinder body. Copper sleeves are provided for support between the piston and the cylinder body and between the piston rod and the end cap.

[0025] Furthermore, all three hydraulic cylinders include a buffer device located in the rear cavity of the cylinder body.

[0026] Furthermore, the pistons of the three hydraulic cylinders are sealed using V-type combination seal rings.

[0027] Furthermore, the piston rod seals at both ends of the three hydraulic cylinders are sealed using two sets of sealing assemblies. The sealing assemblies include a first sealing assembly and a second sealing assembly. The first sealing assembly consists of a step seal and a U-ring, while the second sealing assembly consists of a V-shaped combination sealing ring.

[0028] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved:

[0029] 1. This invention provides a hydraulic cylinder that integrates three reciprocating motions into one unit. Integrating the three hydraulic cylinders into one unit makes the three reciprocating motion actuators very compact and suitable for special application environments in the nuclear power field.

[0030] 2. This invention employs a design where the three hydraulic cylinders operate independently, ensuring that their operation does not interfere with each other and resulting in high equipment reliability.

[0031] 3. The present invention also includes displacement measurement and special position detection mechanisms, which can reliably and timely obtain the required parameters during use, facilitating the control of the use process.

[0032] 4. The present invention also includes an anti-rotation mechanism to prevent the piston rod from rotating during operation, thereby ensuring the stability and reliability of the processing.

[0033] 5. By setting up a copper sleeve support, this invention avoids direct contact and mutual damage between the piston and cylinder, and between the piston rod and end cap.

[0034] 6. By incorporating a buffer device, this invention reduces the vibration and impact caused by the piston rod striking the cylinder bottom when it retracts to its end in each cylinder.

[0035] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0036] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0037] Figure 1 A cross-sectional view of an irregularly shaped hydraulic cylinder in one embodiment is shown;

[0038] Figure 2 An external view of an irregularly shaped hydraulic cylinder in one embodiment is shown;

[0039] Figure 3 A structural diagram of the piston rod stroke detection and anti-rotation mechanism of the first hydraulic cylinder and the third hydraulic cylinder in one embodiment is shown (taking the third hydraulic cylinder as an example);

[0040] Figure 4 A structural diagram of the piston rod stroke detection and anti-rotation mechanism of the second hydraulic cylinder in one embodiment is shown;

[0041] Figure 5 A schematic diagram of the sealing and buffering structure of the first hydraulic cylinder in one embodiment is shown.

[0042] Figure label:

[0043] 1. First hydraulic cylinder; 11. First piston rod;

[0044] 2. Second hydraulic cylinder; 21. Second piston rod; 211. Connecting flange.

[0045] 3. Third hydraulic cylinder; 31. Third piston rod;

[0046] 4. Front cylinder liner; 5. Rear cylinder liner.

[0047] 61. First anti-rotation mechanism; 611. First anti-rotation shaft; 612. First anti-rotation slider.

[0048] 62. Second anti-rotation mechanism; 621. Second anti-rotation shaft; 622. Second anti-rotation slider.

[0049] 63. Third anti-rotation mechanism; 631. Guide rod; 632. Sensor mounting cylinder.

[0050] 71. Displacement sensor mounting sleeve; 72. Magnetic ring;

[0051] 81. First travel detection mechanism; 811. First travel switch mounting bracket; 812. First lever;

[0052] 82. Second travel detection mechanism; 821. Second travel switch mounting bracket; 822. Second lever.

[0053] 83. Third travel detection mechanism; 831. Third travel switch mounting bracket; 832. Third lever; 91. Travel switch; 101. Screw; 102. Piston; 103. End cap; 104. Copper sleeve support; 105. Buffer device; 106. V-type combination sealing ring; 107. First sealing combination. Detailed Implementation

[0054] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0055] The present invention will be further described in detail below with reference to specific embodiments, which should not be construed as limiting the scope of protection claimed by the present invention.

[0056] According to one aspect of the invention, such as Figure 1 As shown, a combined non-standard hydraulic cylinder is proposed, comprising three hydraulic cylinders, namely a first hydraulic cylinder 1, a second hydraulic cylinder 2, and a third hydraulic cylinder 3, which are used to drive a first actuator, a second actuator, and a third actuator (not shown in the figure).

[0057] The second hydraulic cylinder 2 and the third hydraulic cylinder 3 of the present invention can drive two actuators together to achieve material compression, and the first hydraulic cylinder 1 can drive one actuator to perform material shearing operation when the material is compressed.

[0058] The second hydraulic cylinder 2 and the third hydraulic cylinder 3 are coaxially arranged. The axis of the first hydraulic cylinder 1 is parallel to the axes of the second hydraulic cylinder 2 and the third hydraulic cylinder 3. The first hydraulic cylinder 1 is located on one side of the second hydraulic cylinder 2 and the third hydraulic cylinder 3. The first hydraulic cylinder 1 includes a first piston rod 11, the second hydraulic cylinder 2 includes a second piston rod 21, and the third hydraulic cylinder 3 includes a third piston rod 31. The second piston rod 21 is a hollow structure, and at least a portion of the third piston rod 31 is slidably located inside the second piston rod 21.

[0059] Furthermore, both the first piston rod 11 and the third piston rod 31 are hollow structures. The front ends of the first piston rod 11 and the third piston rod 31 are respectively used to connect the first actuator and the third actuator. The front end of the third piston rod 31 is slidably located inside the second piston rod 21.

[0060] The "front end" referred to in this invention is an appendix. Figure 1-4 The left side is the side connected to the actuator; the "rear end" referred to in this invention is the attached... Figure 1-4 On the right side, that is, the other end of the combined irregular hydraulic cylinder opposite to the aforementioned "front end".

[0061] The two piston rods are nested in a sleeve-like form, making the hydraulic drive structure of the present invention more compact and suitable for special application scenarios in the nuclear power field. It also achieves the effects of lower cost and improved reliability.

[0062] Furthermore, both the first piston rod 11 and the third piston rod 31 are provided with screws 101 inside. The two screws 101 are respectively fixed to the rear ends of the first piston rod 11 and the third piston rod 31. The first actuator and the third actuator are respectively fixed to the front ends of the two screws 101 and are tightened by the screws.

[0063] Furthermore, a connecting flange 211 is provided at the front end of the second piston rod 21, and the second actuator is connected to the second piston rod 21 through the connecting flange 211.

[0064] Furthermore, the first hydraulic cylinder 1, the second hydraulic cylinder 2, and the third hydraulic cylinder 3 are all dual-piston rod structures. The front piston rod is used to connect to the actuator, while the rear piston rod is used to fix the connecting screw, as well as to control the displacement sensor and limit switch, and prevent the piston rod from rotating.

[0065] Furthermore, such as Figure 1-2 As shown, the integrated hydraulic cylinder liner is divided into two sections, front and rear, with four cavities. The combined special-shaped hydraulic cylinder also includes a front cylinder liner 4 and a rear cylinder liner 5, which are connected to each other. Both the front cylinder liner 4 and the rear cylinder liner 5 include an upper cavity and a lower cavity. The first hydraulic cylinder 1 is located in the upper cavity of the rear cylinder liner 5, the second hydraulic cylinder 2 is located in the lower cavity of the front cylinder liner 4, and the third hydraulic cylinder 3 is located outside the rear cylinder liner 5.

[0066] Furthermore, such as Figure 3 As shown, it also includes a first anti-rotation mechanism 61 and a second anti-rotation mechanism 62. The first anti-rotation mechanism 61 and the second anti-rotation mechanism 62 are respectively disposed at the rear end of the first hydraulic cylinder 1 and the rear end of the third hydraulic cylinder 3, and are used to prevent the first piston rod and the third piston rod from rotating.

[0067] Furthermore, the first anti-rotation mechanism 61 includes a first anti-rotation shaft 611 and a first anti-rotation slider 612, and the second anti-rotation mechanism 62 includes a second anti-rotation shaft 621 and a second anti-rotation slider 622.

[0068] The first anti-rotation shaft 611 is fixed to the rear cylinder liner 5, and the first anti-rotation slider 612 is fixed to the first piston rod 11. The first anti-rotation slider 612 can slide along the first anti-rotation shaft 611. Specifically, the first anti-rotation slider 612 can slide in the square groove of the first anti-rotation shaft 611 to realize the piston rod anti-rotation function.

[0069] The second anti-rotation shaft 621 is fixed to the cylinder body of the third hydraulic cylinder 3, and the second anti-rotation slider 622 is fixed to the third piston rod 31. The second anti-rotation slider 622 can slide along the second anti-rotation shaft 621. Specifically, the second anti-rotation slider 622 can slide in the square groove of the second anti-rotation shaft 621 to realize the anti-rotation function of the piston rod.

[0070] like Figure 4 As shown, it also includes a third anti-rotation mechanism 63, which includes a guide rod 631 and a sensor mounting cylinder 632. The guide rod 631 is fixed to the connecting flange 211, and the sensor mounting cylinder 632 is fixed to the front cylinder liner 4. The guide rod 631 can slide inside the sensor mounting cylinder 632.

[0071] The third anti-rotation mechanism 63 is mainly used to prevent the displacement sensor from rotating. Further, displacement sensor mounting sleeves 71 (containing displacement sensors) are respectively provided at the rear ends of the first anti-rotation shaft 611 and the second anti-rotation shaft 621. Magnetic rings 72 are provided on the first anti-rotation slider 612 and the second anti-rotation slider 622. The displacement sensor mounting sleeves 71 and the magnetic rings 72 together realize the displacement measurement function of the first piston rod 11 or the third piston rod 31.

[0072] Furthermore, a displacement sensor mounting sleeve 71 (containing a displacement sensor) is provided at the rear end of the sensor mounting cylinder 632, and a magnetic ring 72 is provided at the rear end of the guide rod 631. The displacement sensor mounting sleeve 71 and the magnetic ring 72 together realize the displacement measurement function. The displacement sensor here is mainly used for measuring the stroke of the second and third hydraulic cylinders.

[0073] Furthermore, it also includes a first stroke detection mechanism 81, a second stroke detection mechanism 82, and a third stroke detection mechanism 83, which are respectively located near the rear end of the first hydraulic cylinder 1, the front end of the second hydraulic cylinder 2, and the rear end of the third hydraulic cylinder 3.

[0074] Furthermore, the first stroke detection mechanism 81 includes a first limit switch mounting bracket 811 and a first lever 812. The first limit switch mounting bracket 811 is fixed to the rear cylinder liner 5, and the first lever 812 is fixed to the first anti-rotation slider 612.

[0075] The second stroke detection mechanism 82 includes a second limit switch mounting bracket 821 and a second lever 822. The second limit switch mounting bracket 821 is fixed to the front cylinder liner 4, and the second lever 822 is fixed to the guide rod 631.

[0076] The third stroke detection mechanism 83 includes a third stroke switch mounting bracket 831 and a third lever 832. The third stroke switch mounting bracket 831 is fixed to the cylinder body of the third hydraulic cylinder 3, and the third lever 832 is fixed to the second anti-rotation slider 622.

[0077] Furthermore, the first limit switch mounting bracket 811, the second limit switch mounting bracket 821 and the third limit switch mounting bracket 831 are each provided with two or more limit switches 91, and the limit switches 91 and the three levers together realize the special position detection function.

[0078] The limit switch 91 and the three levers work together to achieve special position detection, and the displacement sensor mounting sleeve 71 and the magnetic ring 72 work together to achieve displacement measurement and can serve as redundant backups for each other's position detection functions, thereby improving the reliability of the equipment.

[0079] like Figure 5 As shown, each of the three hydraulic cylinders includes a piston 102 and an end cap 103. The piston 102 is located inside the hydraulic cylinder body and around the piston rod. The end cap 103 is fixed to the rear end of the hydraulic cylinder body. A copper sleeve support 104 is provided between the piston 102 and the cylinder body, and between the piston rod and the end cap 103. This prevents direct contact and mutual damage between the piston and the cylinder body, and between the piston rod and the end cap.

[0080] Furthermore, all three hydraulic cylinders include a buffer device 105, which is located in the rear cavity of the cylinder body, reducing the vibration and impact caused by the piston rod hitting the bottom of the cylinder when it retracts.

[0081] Furthermore, the pistons 102 of the three hydraulic cylinders are sealed using V-shaped combination seals 106.

[0082] Furthermore, the piston rod seals at both ends of the three hydraulic cylinders are sealed using two sets of sealing assemblies. The sealing assemblies include a first sealing assembly 107 and a second sealing assembly. The first sealing assembly 107 consists of a step seal and a U-ring, and the second sealing assembly consists of a V-shaped combination sealing ring 106.

[0083] Different sealing structures were used to improve the sealing effect of the hydraulic cylinder and extend its service life.

[0084] It should be noted that, Figure 5 Taking the first hydraulic cylinder as an example, the position, shape and structure of the copper sleeve support 104, the buffer device 105 and the sealing ring are shown. The situation in the second and third hydraulic cylinders is basically the same, and adaptive adjustments are made according to the situation in each hydraulic cylinder.

[0085] The hydraulic cylinder in this invention is specifically an oil cylinder.

[0086] The above-described specific embodiments are only one of the embodiments of the present invention. In other embodiments, the number of hydraulic cylinders can be designed to be different from the above embodiments, such as using four or more hydraulic cylinders.

[0087] By applying the above-described technical solution of the present invention, at least the following technical effects are achieved:

[0088] 1. This invention provides a hydraulic cylinder that integrates three reciprocating motions into one unit. Integrating the three hydraulic cylinders into one unit makes the three reciprocating motion actuators very compact and suitable for special application environments in the nuclear power field.

[0089] 2. This invention employs a design where the three hydraulic cylinders operate independently, ensuring that their operation does not interfere with each other and resulting in high equipment reliability.

[0090] 3. The present invention also includes displacement measurement and special position detection mechanisms, which can reliably and timely obtain the required parameters during use, facilitating the control of the use process.

[0091] 4. The present invention also includes an anti-rotation mechanism to prevent the piston rod from rotating during operation, thereby ensuring the stability and reliability of the processing.

[0092] 5. By setting up a copper sleeve support, this invention avoids direct contact and mutual damage between the piston and cylinder, and between the piston rod and end cap.

[0093] 6. By incorporating a buffer device, this invention reduces the vibration and impact caused by the piston rod striking the cylinder bottom when it retracts to its end in each cylinder.

[0094] The above are merely several specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0095] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0096] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A combined special-shaped hydraulic cylinder comprising three hydraulic cylinders, the three hydraulic cylinders being a first hydraulic cylinder (1), a second hydraulic cylinder (2) and a third hydraulic cylinder (3) for driving a first actuator, a second actuator and a third actuator respectively, characterized in that, The second hydraulic cylinder (2) and the third hydraulic cylinder (3) are coaxially arranged, the axis of the first hydraulic cylinder (1) is parallel to the axes of the second hydraulic cylinder (2) and the third hydraulic cylinder (3), the first hydraulic cylinder (1) is arranged on one side of the second hydraulic cylinder (2) and the third hydraulic cylinder (3), the first hydraulic cylinder (1) comprises a first piston rod (11), the second hydraulic cylinder (2) comprises a second piston rod (21), the third hydraulic cylinder (3) comprises a third piston rod (31), the second piston rod (21) is a hollow structure, and at least a part of the third piston rod (31) is slidably located inside the second piston rod (21). Further comprising a front section cylinder sleeve (4), a rear section cylinder sleeve (5), a first anti-rotation mechanism (61) and a first stroke detection mechanism (81), the front section cylinder sleeve (4) is connected with the rear section cylinder sleeve (5), the rear section cylinder sleeve (5) comprises an upper cavity and a lower cavity, and the first hydraulic cylinder (1) is located in the upper cavity of the rear section cylinder sleeve (5). The front section cylinder sleeve (4) comprises an upper cavity and a lower cavity, the second hydraulic cylinder (2) is located in the lower cavity of the front section cylinder sleeve (4), and the third hydraulic cylinder (3) is located outside the rear section cylinder sleeve (5). The first anti-rotation mechanism (61) comprises a first anti-rotation shaft (611) and a first anti-rotation sliding block (612), the first anti-rotation shaft (611) is fixed to the rear section cylinder sleeve (5), the first anti-rotation sliding block (612) is fixed to the first piston rod (11), and the first anti-rotation sliding block (612) is slidable along the first anti-rotation shaft (611). A rear end of the first anti-rotation shaft (611) is provided with a displacement sensor mounting sleeve (71), a magnetic ring (72) is arranged on the first anti-rotation sliding block (612), and the displacement sensor mounting sleeve (71) and the magnetic ring (72) jointly realize the displacement measurement function. The first stroke detection mechanism (81) comprises a first stroke switch mounting rack (811) and a first toggle piece (812), the first stroke switch mounting rack (811) is fixed to the rear section cylinder sleeve (5), and the first toggle piece (812) is fixed to the first anti-rotation sliding block (612).

2. The combined profile hydraulic cylinder according to claim 1, characterized in that The first piston rod (11) and the third piston rod (31) are both hollow structures, front ends of the first piston rod (11) and the third piston rod (31) are respectively used for connecting the first actuating mechanism and the third actuating mechanism, and the front end of the third piston rod (31) is slidably located inside the second piston rod (21).

3. The combined profile hydraulic cylinder according to claim 2, characterized in that Screw rods (101) are arranged in the interiors of the first piston rod (11) and the third piston rod (31), the screw rods (101) are respectively fixed to rear ends of the first piston rod (11) and the third piston rod (31), and the first actuating mechanism and the third actuating mechanism are respectively fixed to front ends of the screw rods (101).

4. The combined profile hydraulic cylinder according to claim 3, characterized in that A connecting flange (211) is arranged at a front end of the second piston rod (21), and the second actuating mechanism is connected to the second piston rod (21) through the connecting flange (211).

5. The combined profile hydraulic cylinder according to claim 4, characterized in that The first hydraulic cylinder (1), the second hydraulic cylinder (2) and the third hydraulic cylinder (3) are all double-outlet piston rod structures.

6. The combined profile hydraulic cylinder according to claim 5, characterized in that A second anti-rotation mechanism (62) is further included, and the first anti-rotation mechanism (61) and the second anti-rotation mechanism (62) are respectively arranged at the rear end of the first hydraulic cylinder (1) and the rear end of the third hydraulic cylinder (3) and are respectively used for preventing the first piston rod (11) and the third piston rod (31) from rotating.

7. The combined profile hydraulic cylinder according to claim 6, characterized in that The second anti-rotation mechanism (62) includes a second anti-rotation shaft (621) and a second anti-rotation sliding block (622), The second anti-rotation shaft (621) is fixed to the cylinder body of the third hydraulic cylinder (3), the second anti-rotation sliding block (622) is fixed to the third piston rod (31), and the second anti-rotation sliding block (622) is slidable along the second anti-rotation shaft (621).

8. The combined profile hydraulic cylinder according to claim 7, characterized in that A third anti-rotation mechanism (63) is further included, the third anti-rotation mechanism (63) includes a guide rod (631) and a sensor mounting cylinder (632), the guide rod (631) is fixed to the connecting flange (211), the sensor mounting cylinder (632) is fixed to the front section cylinder sleeve (4), and the guide rod (631) is slidable in the sensor mounting cylinder (632).

9. The combined profile hydraulic cylinder according to claim 8, characterized in that The rear end of the second anti-rotation shaft (621) is provided with a displacement sensor mounting sleeve (71), and a magnetic ring (72) is arranged on the second anti-rotation sliding block (622).

10. The combined profiled hydraulic cylinder according to claim 9, characterized in that, The rear end of the sensor mounting cylinder (632) is provided with a displacement sensor mounting sleeve (71), the rear end of the guide rod (631) is provided with a magnetic ring (72), and the displacement sensor mounting sleeve (71) and the magnetic ring (72) jointly realize a displacement measurement function.

11. The combined profile hydraulic cylinder according to claim 10, characterized in that A second stroke detection mechanism (82) and a third stroke detection mechanism (83) are further included, and the first stroke detection mechanism (81), the second stroke detection mechanism (82) and the third stroke detection mechanism (83) are respectively arranged close to the rear end of the first hydraulic cylinder (1), the front end of the second hydraulic cylinder (2) and the rear end of the third hydraulic cylinder (3).

12. The combined special-shaped hydraulic cylinder according to claim 11, characterized in that, The second stroke detection mechanism (82) includes a second stroke switch mounting rack (821) and a second tab (822), the second stroke switch mounting rack (821) is fixed to the front section cylinder sleeve (4), and the second tab (822) is fixed to the guide rod (631), The third stroke detection mechanism (83) includes a third stroke switch mounting rack (831) and a third tab (832), the third stroke switch mounting rack (831) is fixed to the cylinder body of the third hydraulic cylinder (3), and the third tab (832) is fixed to the second anti-rotation sliding block (622).

13. The combined profile hydraulic cylinder according to claim 12, characterized in that Two or more stroke switches (91) are arranged on the first stroke switch mounting rack (811), the second stroke switch mounting rack (821) and the third stroke switch mounting rack (831), and the stroke switches (91) and the tabs jointly realize a position detection function.

14. The combined profiled hydraulic cylinder according to any of claims 1-13, characterized in that, Three said hydraulic cylinders each include a piston (102) and an end cover (103), the piston (102) is located in the hydraulic cylinder body and is located at the periphery of the piston rod, the end cover (103) is fixed to the rear end of the hydraulic cylinder body, and a copper bushing support (104) is arranged between the piston (102) and the hydraulic cylinder body and between the piston rod and the end cover (103).

15. The combined profiled hydraulic cylinder according to any of claims 1-13, characterized in that, Three said hydraulic cylinders each include a buffer device (105) located in the rear cavity of the hydraulic cylinder body.

16. The combination profile hydraulic cylinder of claim 14 wherein, The sealing of the piston (102) of the three said hydraulic cylinders uses a V-shaped combined sealing ring (106).

17. The combined profile hydraulic cylinder according to claim 16, characterized in that The sealing of the piston rod at both ends of the three said hydraulic cylinders is sealed by two sets of sealing combinations, the sealing combination includes a first sealing combination (107) and a second sealing combination, the first sealing combination (107) is a stef and a U-shaped ring, and the second sealing combination is a V-shaped combined sealing ring (106).

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