Hydraulic rod end sealing structure

Abstract

The utility model belongs to the technical field of wet sludge dewatering, and particularly relates to a hydraulic rod end sealing structure which comprises a hydraulic cylinder body and a filter pressing box, and the top end of the hydraulic cylinder body is connected with the bottom end of the filter pressing box. The hydraulic cylinder body comprises a cylinder body and a piston rod, the piston rod is movably connected in the cylinder body, the top end of the piston rod penetrates through the top end of the cylinder body, and a waterproof assembly is arranged between the cylinder body and the piston rod; the waterproof assembly comprises a sealing piece, a framework oil seal, a first sealing ring and packing. The framework oil seal, the first sealing ring and the packing are all arranged in the sealing piece. The framework oil seal, the first sealing ring and the packing are sequentially arranged on the outer side of the piston rod from top to bottom, and the inner walls of the framework oil seal, the first sealing ring and the packing are all in sliding connection with the outer wall of the piston rod. By arranging the waterproof assembly, water is prevented from entering the cylinder body to damage the transmission structure.

Description

Technical Field

[0001] This utility model belongs to the field of wet sludge dewatering technology, specifically relating to a hydraulic rod end sealing structure. Background Technology

[0002] With the increasing volume of wastewater generated by residential buildings, public buildings, shops, and other public places, the wastewater contains a large amount of organic matter and various microorganisms, which are extremely difficult to treat. Over time, it settles and forms sludge, which greatly affects the overall water quality. There is an urgent need to treat the sludge by pressure filtration. Sludge filter presses use hydraulic pressure filtration mechanisms to squeeze and stack sludge filter cloth to dewater wet sludge, and have become an indispensable piece of equipment in sludge drying treatment.

[0003] The filter press unit is divided into horizontal and vertical types. In the horizontal filter press unit, the hydraulic cylinders are on both sides and the cylinder body is parallel to the equipment. The cylinder body is not easy to get water in during operation. However, the horizontal complete set of equipment occupies a large area, the equipment layout is not compact, and the space utilization rate is low. Another solution is to use vertical pressing to dewater the sludge filter cloth. During the dewatering process, the wastewater will fall with the hydraulic rod and enter the cylinder body, which will wear the bearings and other transmission structures. Utility Model Content

[0004] The purpose of this utility model is to provide a sealing structure at the end of a hydraulic rod to solve the technical problem that wastewater falls into the hydraulic cylinder during the operation of the hydraulic rod, thereby damaging the bearing seat and other supporting transmission structures. The purpose is to seal the hydraulic rod so that wastewater can be discharged from the top of the hydraulic cylinder, thus preventing wastewater from entering the cylinder and damaging it.

[0005] To solve the above-mentioned technical problems, this utility model provides a hydraulic rod end sealing structure, including: a hydraulic cylinder body and a filter press box, wherein the top end of the hydraulic cylinder body is connected to the bottom end of the filter press box;

[0006] The hydraulic cylinder body includes a cylinder body and a piston rod. The piston rod is movably connected inside the cylinder body, and the top end of the piston rod passes through the top end of the cylinder body. A waterproof component is provided between the cylinder body and the piston rod.

[0007] The waterproof component includes a seal, a skeleton oil seal, a first sealing ring, and a packing, wherein the skeleton oil seal, the first sealing ring, and the packing are all disposed inside the seal;

[0008] The skeleton oil seal, the first sealing ring, and the packing are arranged sequentially from top to bottom on the outer side of the piston rod, and the inner walls of the skeleton oil seal, the first sealing ring, and the packing are all slidably connected to the outer wall of the piston rod.

[0009] Furthermore, both the cylinder body and the piston rod are cylindrical, and the top of the cylinder body is provided with an opening;

[0010] A mounting ring is provided at the top of the cylinder body. The outer diameter of the mounting ring is larger than the outer diameter of the cylinder body, and the inner diameter of the mounting ring is equal to the inner diameter of the cylinder body.

[0011] Furthermore, the top end of the mounting ring is provided with a first threaded hole, and the mounting ring is detachably connected to the seal by a screw;

[0012] The sealing element includes a first housing and a second housing, both of which are semi-cylindrical. The outer diameter of the first housing is larger than that of the second housing. The bottom end of the first housing is perpendicularly connected to the top end of the second housing.

[0013] Furthermore, the first housing is placed at the top of the mounting ring, and a second threaded hole is provided at the top of the first housing. The second threaded hole penetrates the first housing and is coaxially arranged with the first threaded hole.

[0014] The screw passes through the second threaded hole and the first threaded hole in sequence, and the screw is threadedly connected to the seal and the cylinder body respectively.

[0015] Furthermore, two seals are provided, one at each end of the piston rod, and the second housing is located between the cylinder and the piston rod, with the two ends of the second housing abutting against the inner wall of the cylinder and the outer wall of the piston rod, respectively.

[0016] The second housing has a chamber at one end near the piston rod, and the skeleton oil seal, the first sealing ring and the packing are all located in the chamber.

[0017] Furthermore, a first spring ring, a second spring ring, and a second sealing ring are also sleeved on the outer side of the piston rod. The first spring ring and the second spring ring are slidably connected to the outer wall of the piston rod, and the first spring ring and the second spring ring are both located in the cavity.

[0018] The first spring coil is located at the top end of the packing, and the second spring coil is located at the bottom end of the packing. The top and bottom ends of the packing abut against the first spring coil and the second spring coil, respectively.

[0019] Furthermore, the second sealing ring is located below the second spring ring, the second sealing ring is slidably connected to the outer wall of the piston rod, and the second sealing ring is located in the cavity.

[0020] Furthermore, a fixing ring is fixedly provided on the outer side of the cylinder body, and the fixing ring is used to install the hydraulic cylinder body.

[0021] Furthermore, the filter press box is provided with a plurality of filter plates, which are connected by a plurality of connecting frames. The filter plates are arranged perpendicularly to the connecting frames, and the filter plates are slidably connected to the connecting frames.

[0022] Furthermore, the top end of the piston rod passes through the bottom end of the filter press box and is connected to the filter plate, and a drive assembly is connected to the bottom end of the piston rod.

[0023] The beneficial effects of this utility model are:

[0024] 1. By setting up waterproof components, the skeleton oil seal, the first sealing ring, the packing, and the second sealing ring are sequentially fitted onto the outside of the piston rod. Wastewater flows into the skeleton oil seal along the piston rod, and the skeleton oil seal blocks large particles in the wastewater, preventing them from entering the cylinder. The first sealing ring, the packing, and the second sealing ring effectively block the remaining water, preventing water from entering the cylinder. The packing is serpentinely wrapped around the piston rod, and the gaps in it form a labyrinth to trap the wastewater, thus achieving a sealing effect. The two ends of the packing are provided with the first spring ring and the second spring ring, which press the packing tightly to prevent it from loosening and ensure its sealing performance. When there is enough wastewater, it overflows from the top of the hydraulic cylinder.

[0025] 2. By setting a sealing element, the sealing element has a cavity to house the waterproof component, and also reduces the gap between the cylinder and the piston rod to prevent a large amount of wastewater from flowing into the cylinder. The sealing element is equipped with screws for fixed connection with the cylinder, which improves the stability of the waterproof component and thus improves the sealing and waterproofing effect.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of a hydraulic rod end sealing structure according to the present invention;

[0029] Figure 2This is a structural schematic diagram of the waterproof component of this utility model;

[0030] Figure 3 This is a top view of the sealing element of this utility model.

[0031] In the picture:

[0032] 1. Hydraulic cylinder body; 2. Cylinder body; 21. Mounting ring; 22. Retaining ring; 3. Piston rod; 4. Waterproof assembly; 41. Seal; 411. First housing; 4111. Screw; 412. Second housing; 4121. Chamber; 42. Skeleton oil seal; 43. First sealing ring; 44. First spring ring; 45. Packing; 46. Second spring ring; 47. Second sealing ring; 5. Filter press box; 51. Filter press plate; 52. Connecting frame. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] Example:

[0035] like Figures 1 to 3 As shown, a hydraulic rod end sealing structure includes: a hydraulic cylinder body 1 and a filter press box 5, the top end of the hydraulic cylinder body 1 being connected to the bottom end of the filter press box 5; the hydraulic cylinder body 1 includes a cylinder body 2 and a piston rod 3, a fixing ring 22 is fixedly provided on the outer side of the cylinder body 2, the fixing ring 22 being used to install the hydraulic cylinder body 1; the piston rod 3 is movably connected inside the cylinder body 2, the top end of the piston rod 3 passing through the top end of the cylinder body 2, the piston rod 3 moving up and down relative to the cylinder body 2, a waterproof component 4 being provided between the cylinder body 2 and the piston rod 3, the waterproof component 4 reducing the gap between the cylinder body 2 and the piston rod 3.

[0036] The waterproof component 4 includes a seal 41, a skeleton oil seal 42, a first sealing ring 43, and a packing 45. The skeleton oil seal 42, the first sealing ring 43, and the packing 45 are all located inside the seal 41. The skeleton oil seal 42, the first sealing ring 43, and the packing 45 are arranged sequentially from top to bottom on the outer side of the piston rod 3. The inner walls of the skeleton oil seal 42, the first sealing ring 43, and the packing 45 are slidably connected to the outer wall of the piston rod 3. The skeleton oil seal 42 isolates the lubricated parts in the transmission components from the external environment, preventing lubricating oil leakage and maintaining the shape and tension of the oil seal. The skeleton oil seal 42 blocks large particles of debris in the wastewater, preventing particles from entering the cylinder 2. The packing 45 is serpentinely wrapped around the piston rod 3, and the gaps in it form a labyrinth to trap wastewater, thereby achieving a sealing effect.

[0037] like Figure 2 As shown, a first spring ring 44, a second spring ring 46, and a second sealing ring 47 are also fitted on the outer side of the piston rod 3. The first spring ring 44 and the second spring ring 46 are slidably connected to the outer wall of the piston rod 3 and are both located in the chamber 4121. The first spring ring 44 is located at the top of the packing 45, and the second spring ring 46 is located at the bottom of the packing 45. The top and bottom of the packing 45 abut against the first spring ring 44 and the second spring ring 46, respectively. The first spring ring 44 and the second spring ring 46 press the packing 45 tightly to prevent it from loosening and to ensure its sealing. The second sealing ring 47 is located below the second spring ring 46 and is slidably connected to the outer wall of the piston rod 3. The second sealing ring 47 is located in the chamber 4121. The first sealing ring 43, the packing 45, and the second sealing ring 47 effectively block the remaining water to prevent water from entering the cylinder body 2. When there is enough wastewater, it overflows from the top of the hydraulic cylinder body 1.

[0038] In this embodiment, both the cylinder body 2 and the piston rod 3 are cylindrical, and the top of the cylinder body 2 has an opening. A mounting ring 21 is provided at the top of the cylinder body 2. The outer diameter of the mounting ring 21 is larger than the outer diameter of the cylinder body 2, and the inner diameter of the mounting ring 21 is equal to the inner diameter of the cylinder body 2. A first threaded hole is provided at the top of the mounting ring 21. The mounting ring 21 is detachably connected to the seal 41 by a screw 4111. The seal 41 includes a first housing 411 and a second housing 412. Both the first housing 411 and the second housing 412 are semi-cylindrical, and the outer diameter of the first housing 411 is larger than the outer diameter of the second housing 412. The bottom end of the first housing 411 is perpendicularly connected to the top end of the second housing 412. The first housing 411 is placed on the top of the mounting ring 21, and a second threaded hole is provided at the top of the first housing 411, penetrating the first housing 411. The second threaded hole and the first threaded hole are coaxially arranged. The screw 411... 1. A screw 4111 is threaded through the second threaded hole and the first threaded hole, and is threaded to the seal 41 and the cylinder 2 respectively. The screw 4111 is screwed into the second threaded hole and the first threaded hole, thereby fixing the seal 41 and the cylinder 2, reducing the gap between the cylinder 2 and the piston rod 3, and improving the stability of the other waterproof components 4. There are two seals 41, which are respectively located at both ends of the piston rod 3. The second housing 412 is located between the cylinder 2 and the piston rod 3. The two ends of the second housing 412 abut against the inner wall of the cylinder 2 and the outer wall of the piston rod 3 respectively. The piston rod 3 passes through the middle of the two seals 41. The two seals 41 can be removed by removing the screw 4111, which is convenient for disassembly and installation. A chamber 4121 is opened at the end of the second housing 412 near the piston rod 3. The skeleton oil seal 42, the first sealing ring 43 and the packing 45 are all located in the chamber 4121.

[0039] In this embodiment, the filter press box 5 is provided with a plurality of filter press plates 51, which are connected by a plurality of connecting frames 52. The filter press plates 51 and the connecting frames 52 are arranged perpendicularly and are slidably connected. The top end of the piston rod 3 passes through the bottom end of the filter press box 5 and is connected to the filter press plate 51. The bottom end of the piston rod 3 is connected to a drive assembly. The top end of the filter press box 5 is also provided with a common hydraulic cylinder. Under the action of the drive assembly, the upper and lower hydraulic cylinders push the filter press plate 51, and the filter press plate 51 slides on the connecting frame 52. The wet sludge on the filter press plate 51 is squeezed and dewatered, and the wastewater flows out through the filter cloth.

[0040] In summary, after fixing the hydraulic cylinder body 1, the filter press box 5 is installed at the top of the piston rod 3. Then, a regular hydraulic cylinder is installed at the top of the filter press box 5. Activating the upper and lower hydraulic cylinders pushes the filter plate 51, which slides on the connecting frame 52. The wet sludge on the filter plate 51 is squeezed, and the dewatered wastewater flows out through the filter cloth. The wastewater flows into the hydraulic cylinder body 1 along with the piston rod 3. Most of the wastewater is first blocked by the seal 41 and flows out of the cylinder body 2. Some wastewater flows into the chamber 4121 through the gap between the seal 41 and the piston rod 3. The wastewater then flows along the piston rod 3 into the skeleton oil seal 42. The skeleton oil seal 42 blocks large particles of debris in the wastewater, preventing them from entering the cylinder body 2. The first sealing ring 43, packing 45, and second sealing ring 47 effectively block the remaining water, preventing it from entering the cylinder body 2. The packing 45 is serpentinely wrapped around the piston rod 3, with gaps forming a labyrinth to trap the wastewater and thus provide a sealing effect. The two ends of the packing 45 are provided with a first spring ring 44 and a second spring ring 46, which press the packing 45 tightly to prevent it from loosening and ensure its sealing performance. When there is enough wastewater, it overflows from the top of the hydraulic cylinder body 1.

[0041] All the devices selected in this application are general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0042] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 do not 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A hydraulic rod end sealing structure, characterized in that, include: The hydraulic cylinder body (1) and the filter press box (5) are connected at the top and bottom of the filter press box (5). The hydraulic cylinder body (1) includes a cylinder body (2) and a piston rod (3). The piston rod (3) is movably connected inside the cylinder body (2). The top end of the piston rod (3) passes through the top end of the cylinder body (2). A waterproof component (4) is provided between the cylinder body (2) and the piston rod (3). The waterproof component (4) includes a seal (41), a skeleton oil seal (42), a first sealing ring (43), and a packing (45), wherein the skeleton oil seal (42), the first sealing ring (43), and the packing (45) are all located inside the seal (41); The skeleton oil seal (42), the first sealing ring (43) and the packing (45) are arranged sequentially from top to bottom on the outside of the piston rod (3), and the inner walls of the skeleton oil seal (42), the first sealing ring (43) and the packing (45) are all slidably connected to the outer wall of the piston rod (3).

2. The hydraulic rod end sealing structure as described in claim 1, characterized in that, Both the cylinder (2) and the piston rod (3) are cylindrical, and the top of the cylinder (2) is provided with an opening; The top of the cylinder (2) is provided with a mounting ring (21), the outer diameter of the mounting ring (21) is larger than the outer diameter of the cylinder (2), and the inner diameter of the mounting ring (21) is equal to the inner diameter of the cylinder (2).

3. The hydraulic rod end sealing structure as described in claim 2, characterized in that, The top end of the mounting ring (21) is provided with a first threaded hole, and the mounting ring (21) is detachably connected to the sealing element (41) by a screw (4111); The sealing element (41) includes a first housing (411) and a second housing (412). Both the first housing (411) and the second housing (412) are semi-cylindrical. The outer diameter of the first housing (411) is larger than the outer diameter of the second housing (412). The bottom end of the first housing (411) is perpendicularly connected to the top end of the second housing (412).

4. The hydraulic rod end sealing structure as described in claim 3, characterized in that, The first housing (411) is placed at the top of the mounting ring (21). The top of the first housing (411) is provided with a second threaded hole, which penetrates the first housing (411). The second threaded hole is coaxial with the first threaded hole. The screw (4111) passes through the second threaded hole and the first threaded hole in sequence, and the screw (4111) is threadedly connected to the seal (41) and the cylinder (2) respectively.

5. The hydraulic rod end sealing structure as described in claim 3, characterized in that, Two seals (41) are provided, and the two seals (41) are respectively provided at both ends of the piston rod (3). The second housing (412) is provided between the cylinder (2) and the piston rod (3). The two ends of the second housing (412) abut against the inner wall of the cylinder (2) and the outer wall of the piston rod (3) respectively. The second housing (412) has a chamber (4121) at one end near the piston rod (3), and the skeleton oil seal (42), the first sealing ring (43) and the packing (45) are all located in the chamber (4121).

6. The hydraulic rod end sealing structure as described in claim 5, characterized in that, The piston rod (3) is also fitted with a first spring ring (44), a second spring ring (46) and a second sealing ring (47) on its outer side. The first spring ring (44) and the second spring ring (46) are slidably connected to the outer wall of the piston rod (3). The first spring ring (44) and the second spring ring (46) are both located in the chamber (4121). The first spring coil (44) is located at the top end of the packing (45), and the second spring coil (46) is located at the bottom end of the packing (45). The top end and the bottom end of the packing (45) abut against the first spring coil (44) and the second spring coil (46) respectively.

7. The hydraulic rod end sealing structure as described in claim 6, characterized in that, The second sealing ring (47) is located below the second spring ring (46), the second sealing ring (47) is slidably connected to the outer wall of the piston rod (3), and the second sealing ring (47) is located inside the chamber (4121).

8. The hydraulic rod end sealing structure as described in claim 1, characterized in that, A fixing ring (22) is fixedly provided on the outer side of the cylinder body (2), and the fixing ring (22) is used to install the hydraulic cylinder body (1).

9. A hydraulic rod end sealing structure as described in claim 1, characterized in that, The filter press box (5) is provided with a plurality of filter press plates (51), which are connected by a plurality of connecting frames (52). The plurality of filter press plates (51) and the plurality of connecting frames (52) are arranged perpendicularly, and the plurality of filter press plates (51) and the plurality of connecting frames (52) are slidably connected.

10. A hydraulic rod end sealing structure as described in claim 9, characterized in that, The top end of the piston rod (3) passes through the bottom end of the filter press box (5) and is connected to the filter plate (51). The bottom end of the piston rod (3) is connected to a drive assembly.

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