A sealing device for hydraulic lifting equipment in building slipform process

Abstract

This utility model discloses a sealing device for a hydraulic lifting equipment in a building slipform process. It includes a slipform hydraulic jack mounted on the outer wall of a climbing rod. An annular groove is formed on the outer wall of the hydraulic piston, and a sliding sealing structure is installed within the groove. This sliding sealing structure includes an annular sealing ring with a lower annular lip at the bottom and an upper annular lip at the top, forming a double-lip seal. An annular oil reservoir is located inside the annular sealing ring, and a replenishing hole at the bottom of the reservoir guides lubricating oil to the upper part of the lower annular lip. This utility model enhances sealing reliability through the double-lip sealing structure, achieves continuous self-lubrication using the oil reservoir and replenishing hole, reduces friction and wear, and provides radial elastic compensation force through a built-in compensating spring to automatically compensate for wear. This effectively solves the problems of hydraulic oil leakage and severe seal wear in existing technologies, extending the service life of the sealing device.

Description

Technical Field

[0001] This utility model relates to the technical field of slipform construction equipment, specifically a sealing device for a hydraulic lifting device for slipform construction. Background Technology

[0002] Slipform construction is a highly efficient and continuous forming technology widely used in the construction of modern high-rise buildings and silo structures. The hydraulic lifting equipment, as the core driving component of the slipform system, directly affects construction quality and project safety due to its performance and reliability. The slipform hydraulic jacks are installed on the outside of the climbing rod, and through the reciprocating motion of the hydraulic pistons, they drive the formwork system to gradually climb along the climbing rod, thereby achieving continuous concrete pouring and synchronous slipforming of the formwork.

[0003] In existing technologies, ordinary O-rings or Y-rings are often used for dynamic sealing between the hydraulic piston and the jack cylinder. However, in actual construction, these sealing rings are prone to wear during frequent reciprocating motion, leading to decreased sealing performance and hydraulic oil leakage. Furthermore, traditional sealing structures lack continuous self-lubrication capabilities, and the coefficient of friction increases over long periods of operation, further accelerating seal wear and shortening their service life.

[0004] Therefore, we propose a sealing device for hydraulic lifting equipment in building slipform process. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a sealing device for hydraulic lifting equipment in building slipform processes. Through the synergistic effect of double-lip sealing, continuous self-lubrication, and elastic compensation, the reliability, wear resistance, and service life of the sealing device are improved, effectively solving the problems of hydraulic oil leakage and severe wear in existing technologies.

[0006] (II) Technical Solution To achieve the above objectives, the technical solution adopted by this utility model is as follows: a sealing device for a hydraulic lifting equipment in a building slipform process, comprising a slipform hydraulic jack installed on the outer wall of a climbing rod, wherein an annular groove is formed on the outer wall of the hydraulic piston in the slipform hydraulic jack, and a sliding sealing structure is provided inside the annular groove, the sliding sealing structure comprising an annular sealing ring installed in the annular groove, a lower annular lip being provided on the lower part of the outer wall of the annular sealing ring, and an upper annular lip being provided on the upper part of the outer wall of the annular sealing ring; an annular oil storage cavity is provided inside the annular sealing ring, and an oil replenishment hole is provided at the bottom of the oil storage cavity to guide lubricating oil to the upper part of the lower annular lip.

[0007] Preferably, the number of oil replenishing holes is multiple sets, and the multiple sets of oil replenishing holes are evenly distributed circumferentially at the bottom of the oil storage cavity, with the oil outlet of the oil replenishing hole located above the lower annular lip.

[0008] Preferably, the upper outer surface of the lower annular lip is provided with an oil-collecting recess for accumulating lubricating oil, and the oil-collecting recess is located below the oil outlet of the oil replenishment hole.

[0009] Preferably, the oil storage cavity is provided with an elastic compensation element for providing radial elastic compensation force to the outer wall of the annular sealing ring.

[0010] Preferably, the elastic compensation element is a compensation spring disposed circumferentially within the oil storage cavity.

[0011] Preferably, the upper end of the annular sealing ring is provided with an oil filling port that communicates with the oil storage cavity, and the oil filling port is equipped with an openable and closable sealing plug.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides a sealing device for a hydraulic lifting equipment in a building slipform process, which has the following beneficial effects: 1. The sealing device of the hydraulic lifting equipment for building slipform process forms a double-lip sealing structure by setting a lower annular lip and an upper annular lip respectively on the lower and upper parts of the outer wall of the annular sealing ring; thereby enhancing the sealing reliability under high pressure and frequent reciprocating motion conditions.

[0013] 2. The sealing device of the hydraulic lifting equipment for building slipform process achieves continuous and micro-automatic lubrication of the sealing lip by setting an annular oil storage cavity inside the annular sealing ring and an oil replenishment hole connected thereto; it reduces the friction coefficient between the annular lip and the climbing rod, reduces abnormal wear, and extends the service life of the sealing device, and is particularly suitable for harsh working conditions with dust and high loads at construction sites.

[0014] 3. The sealing device of the hydraulic lifting equipment for slipform construction has a compensating spring installed in the oil storage chamber as an elastic compensating component. The spring can provide a continuous radial elastic compensating force to the annular sealing ring, automatically compensating for the pressure loss caused by the wear of the sealing ring, so that the sealing lip can always maintain the best contact with the surface of the climbing rod, thereby improving the sealing effect.

[0015] 4. The sealing device of the hydraulic lifting equipment for building slipform process has an oil-collecting pit on the upper surface of the lower annular lip. The pit is located below the oil outlet of the oil replenishment hole, which can effectively accumulate the lubricating oil flowing out of the oil replenishment hole, increase the residence time of the lubricating grease at the lip, further optimize the lubrication effect, and prevent the grease from being lost too quickly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the sealing device of a hydraulic lifting equipment for building slipform process according to this utility model.

[0017] Figure 2 This is a schematic diagram of the hydraulic piston in a hydraulic lifting device for building slipform process according to this utility model.

[0018] Figure 3 This is a schematic diagram of the sliding seal structure in the sealing device of a hydraulic lifting equipment for building slipform process according to this utility model.

[0019] Figure 4 This is a partial side view cross-sectional view of the annular sealing ring in the sealing device of a hydraulic lifting equipment for building slipform process according to this utility model.

[0020] In the diagram: 1. Sliding mold hydraulic jack; 2. Hydraulic piston; 3. Annular groove; 4. Climbing rod; 5. Annular seal ring; 6. Lower annular lip; 7. Upper annular lip; 8. Oil hanging pit; 9. Oil filling hole; 10. Annular oil storage chamber; 11. Compensating spring; 12. Oil filling port; 13. Sealing plug; 14. Sliding sealing structure. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figure 1-4 As shown, this utility model provides a sealing device for a hydraulic lifting equipment in a building slipform process. This device is mainly used for sealing the hydraulic piston 2 inside the slipform hydraulic jack 1.

[0023] The hydraulic piston 2 is mounted on the outside of the climbing rod 4 and can reciprocate up and down along it. An annular groove 3 is formed on the outer peripheral wall of the hydraulic piston 2 for installing the sliding sealing structure 14.

[0024] The core of the sliding sealing structure 14 is the annular sealing ring 5, which is made of oil-resistant and wear-resistant rubber or polyurethane material and is fixed in the annular groove 3. The lower part of the outer wall of the annular sealing ring 5 is provided with a lower annular lip 6, and the upper part of the outer wall is provided with an upper annular lip 7. The above-mentioned double-lip structure together constitutes the main sealing interface, improving the sealing performance.

[0025] An annular oil reservoir 10 is provided inside the annular sealing ring 5. This reservoir is used to store grease or high-viscosity lubricating oil. At the bottom of the oil reservoir 10, multiple sets of oil replenishment holes 9 are evenly distributed circumferentially. The outlets of these oil replenishment holes 9 point towards and are located above the lower annular lip 6. During operation, the lubricating oil in the oil reservoir 10 slowly and continuously seeps out through the oil replenishment holes 9 under the influence of gravity and minor pressure changes caused by piston movement, thereby achieving lubrication. To further optimize the utilization of lubricating grease, an oil-retaining pit 8 is provided on the upper outer surface of the lower annular lip 6. This pit is located below the oil replenishment hole 9 and can effectively collect and accumulate seepage lubricating oil, prolonging the oil film retention time and ensuring that the lip area always maintains good lubrication during reciprocating motion.

[0026] To compensate for the radial force attenuation that may occur due to long-term wear of the sealing ring, an elastic compensating element is also provided in the oil reservoir 10. In this embodiment, the elastic compensating element is a compensating spring 11 arranged circumferentially. This spring continuously provides radial elastic expansion force to the outer wall of the annular sealing ring 5, thereby improving the sealing performance.

[0027] To facilitate periodic oil replenishment or initial oiling of the oil storage chamber 10, an oiling port 12 communicating with the oil storage chamber 10 is provided at the upper end of the annular sealing ring 5. The oiling port 12 is equipped with an openable and closable sealing plug 13 to ensure the sealing of the oil storage chamber when not being filled, preventing dirt from entering or grease from overflowing.

[0028] The working principle of this utility model is as follows: When the slipform hydraulic system is working, the hydraulic piston 2 reciprocates along the climbing rod 4, and the lower annular lip 6 and the upper annular lip 7 form an effective seal. At the same time, the lubricating oil stored in the oil reservoir 10 slowly seeps out through the oil replenishment hole 9, forming a lubricating film and reducing friction and wear. This achieves long-term, reliable, and self-lubricating sealing under harsh construction conditions.

[0029] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only 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 said element.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A sealing device for a hydraulic lifting equipment in a building slipform process, comprising a slipform hydraulic jack (1) installed on the outer wall of a climbing rod (4), wherein an annular groove (3) is provided on the outer wall of the hydraulic piston (2) in the slipform hydraulic jack (1), characterized in that: The annular groove (3) is provided with a sliding sealing structure (14), which includes an annular sealing ring (5) installed in the annular groove (3). The lower part of the outer wall of the annular sealing ring (5) is provided with a lower annular lip (6), and the upper part of the outer wall of the annular sealing ring (5) is provided with an upper annular lip (7). The annular sealing ring (5) is provided with an annular oil storage cavity (10) inside, and the bottom of the oil storage cavity (10) is provided with an oil replenishment hole (9) that guides the lubricating oil to the upper part of the lower annular lip (6).

2. The sealing device for a hydraulic lifting equipment in a building slipform process according to claim 1, characterized in that: The number of oil replenishing holes (9) is multiple sets, and the multiple sets of oil replenishing holes (9) are evenly distributed in the circumferential direction at the bottom of the oil storage cavity (10). The oil outlet of the oil replenishing hole (9) is located above the lower annular lip (6).

3. The sealing device for a hydraulic lifting equipment in a building slipform process according to claim 2, characterized in that: The upper outer surface of the lower annular lip (6) is provided with an oil-collecting pit (8) for accumulating lubricating oil, and the oil-collecting pit (8) is located below the oil outlet of the oil replenishment hole (9).

4. The sealing device for a hydraulic lifting equipment in a building slipform process according to claim 1, characterized in that: The oil storage cavity (10) is provided with an elastic compensation element for providing radial elastic compensation force to the outer wall of the annular sealing ring (5).

5. The sealing device for a hydraulic lifting equipment in a building slipform process according to claim 4, characterized in that: The elastic compensation component is a compensation spring (11) disposed circumferentially within the oil storage cavity (10).

6. The sealing device for a hydraulic lifting equipment in a building slipform process according to claim 1, characterized in that: The upper end of the annular sealing ring (5) is provided with an oil filling port (12) that communicates with the oil storage chamber (10), and the oil filling port (12) is equipped with an openable and closable sealing plug (13).

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