Integrated front cover flange sealing enhanced jack

Abstract

The utility model discloses an integrated front cover flange sealing enhanced jack which is used for improving safety and reliability of the jack in prestress construction. The jack comprises a jack body, a middle cylinder, an outer cylinder and a sealing structure composed of a flange sealing cover and an oil return opening. The sealing structure is connected with the outer cylinder through a fixing bolt, a groove body is arranged in the flange sealing cover, a sealing piece is arranged in the groove body, and the oil return opening is connected with the first oil filling end through a mounting groove. An inner cylinder is arranged in the middle cylinder in a penetrating mode, a locking nut and a lock washer are arranged outside the inner cylinder, and a sealing check ring is embedded in the pushing end in the outer cylinder. Through the design of the integrated front cover, the sealing performance of the jack is enhanced, the rear cover is effectively prevented from outburst in a high-pressure environment, and the operation risk is reduced. Meanwhile, the structural design of the inner cylinder and the pushing end ensures the stability and durability of the jack, the jack is suitable for prestress construction of infrastructures such as bridges and buildings, and the engineering quality and the construction efficiency are improved.

Description

Technical Field

[0001] This utility model provides a jack, belonging to the technical field of prestressed anchor cable tensioning jacks, and particularly relates to an integrated front cover flange sealing enhanced jack. Background Technology

[0002] A tensioning jack is a device specifically designed to apply prestress. It operates through a hydraulic system and its main components include a hydraulic cylinder, piston, and oil pump. It applies tension force to prestressed tendons, such as steel strands or reinforcing bars, to impart prestress to the structural member. The working principle of the jack is that the oil pump supplies oil to the jack, which then applies force to the applied body. The applied force is directly or indirectly indicated by an indicator connected to the jack. In engineering, tensioning jacks are commonly used in the construction of infrastructure such as bridges, buildings, and roads to maintain structural stability and safety.

[0003] When a traditional tensioning machine is filled with high-pressure liquid, the outer rod drives the inner cylinder and steel strands to move downwards. Then, high-pressure liquid is filled from another direction to return the middle cylinder to its original position. During this process, because the rear cover of the traditional tensioning machine uses a threaded connection, it is easy for it to burst out under high pressure, causing personal injury or death, resulting in a high operational risk. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this application provides an integrated front cover flange sealing enhanced jack, which solves the problems of easy back cover popping out, poor sealing performance and high operation risk of traditional jacks under high pressure.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an integrated front cover flange sealing enhanced jack, including a jack body, a middle cylinder located inside the jack body, and an outer cylinder sleeved outside one end of the middle cylinder. The outer cylinder has a sealing structure connected to the end near the middle section of the middle cylinder by fixing bolts. The sealing structure includes a flange sealing cover and an oil return port.

[0006] The flange sealing cover and the oil return port are integrated. The flange sealing cover has several grooves on the side near the middle cylinder. The oil return port is connected to the first oil filling end through an installation groove on the end opposite to the middle cylinder.

[0007] The sealing structure is located between the middle cylinder and the outer cylinder.

[0008] Preferably, the inner cylinder is provided inside the middle cylinder, which passes through itself, the outer cylinder, and the sealing structure, and part of the inner cylinder is located outside the outer cylinder.

[0009] Preferably, the inner cylinder is fitted with a locking nut corresponding to itself at one end outside the outer cylinder, and a locking nut is connected to the side of the locking nut away from the outer cylinder through a locking washer. Both the locking washer and the locking nut are fitted outside the inner cylinder.

[0010] Preferably, the locking nut has a second oil-filling end that penetrates the outer cylinder on one side, and the outer cylinder has a push end that is penetrated by the inner cylinder and integrally connected with the middle cylinder. A sealing ring is embedded in the push end on the side close to the outer cylinder and the inner cylinder.

[0011] Preferably, the sealing structure and the pushing end are both in close contact with the outer cylinder and the middle cylinder, and an air chamber is left between the middle cylinder and the outer cylinder. The end of the mounting groove away from the first oil filling end is provided with an air filling channel that passes through the oil return port and communicates with the air chamber.

[0012] Preferably, the oil return port is provided with a number of evenly distributed bolt holes corresponding to the mounting bolts, and the inside of the groove is provided with sealing elements, including but not limited to sealing rings, retaining rings and dustproof rings.

[0013] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0014] This invention effectively solves the problems of traditional jacks, such as easy rear cover popping out, poor sealing performance, and high operational risks, through the design of an integrated front cover flange sealing enhanced jack. Specifically, the jack uses an integrated flange sealing cover and oil return port, which are tightly connected to form a sealed structure and installed between the middle cylinder and the outer cylinder. The flange sealing cover has several evenly distributed grooves on the side near the middle cylinder to enhance sealing performance. Meanwhile, the end of the oil return port away from the middle cylinder is connected to the first oil filling end through a mounting groove, ensuring structural stability during high-pressure inflation. This integrated design ensures a tight fit between the flange sealing cover and the outer cylinder, effectively preventing the rear cover from popping out during jack movement, thus significantly improving the sealing performance and safety of the equipment under high-pressure environments and reducing operational risks.

[0015] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0016] Figure 1 This is an overall sectional view of an integrated front cover flange sealing enhanced jack according to the present invention;

[0017] Figure 2 This is a front view of the flange sealing cover of an integrated front cover flange sealing enhanced jack according to the present invention.

[0018] Figure 3 This is a partially enlarged view of the flange sealing cover of an integrated front cover flange sealing enhanced jack according to the present invention.

[0019] Figure 4 This is a partially enlarged view of the pushing end of an integrated front cover flange sealing enhanced jack according to this utility model.

[0020] As shown in the figure:

[0021] 1. Jack body;

[0022] 11. Middle cylinder; 12. Outer cylinder; 13. Fixing bolt; 14. First oil filling end; 15. Inner cylinder; 16. Locking nut; 17. Second oil filling end; 18. Pushing end; 19. Sealing ring;

[0023] 2. Sealed structure;

[0024] 21. Flange sealing cover; 22. Oil return port; 23. Tank body; 24. Mounting groove; 25. Air chamber; 26. Bolt hole; 27. Seal. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] like Figure 1 and Figure 4As shown, this utility model provides an integrated front-cover flange-sealed enhanced jack, including a jack body 1, a middle cylinder 11, an outer cylinder 12, and a sealing structure 2. The middle cylinder 11 is located inside the jack body 1, and the outer cylinder 12 is fitted outside the middle cylinder 11 and connected to the sealing structure 2 by fixing bolts 13. The sealing structure 2 consists of an integrated flange sealing cover 21 and an oil return port 22. The flange sealing cover 21 has several grooves 23 on the side near the middle cylinder 11, and sealing elements 27, such as sealing rings, retaining rings, and dustproof rings, are provided in the grooves 23. The end of the oil return port 22 opposite to the middle cylinder 11 is connected to the first oil filling end 14 through an installation groove 24. The sealing structure 2 is located between the middle cylinder 11 and the outer cylinder 12, with an air chamber 25 between them, and the installation groove 24 communicates with the air chamber 25 through an air filling channel. The oil return port 22 has bolt holes 26 corresponding to the fixing bolts 13.

[0029] In this embodiment, the design of the sealing structure 2 further enhances the sealing performance of the jack. The integrated design of the flange sealing cover 21 and the oil return port 22 ensures that the sealing structure 2 can tightly fit the outer cylinder 12 during high-pressure inflation, preventing liquid leakage. The sealing elements 27, such as sealing rings, retaining rings, and dust rings, installed inside the tank 23 provide additional sealing protection, effectively preventing liquid and liquid penetration.

[0030] like Figure 4 As shown, the design of the push end 18 is equally crucial. It is integrated with the middle cylinder 11 to ensure stability during the application of prestress. A sealing ring 19 is embedded in the side of the push end 18 near the outer cylinder 12 and the inner cylinder 15, which further enhances the sealing effect and prevents liquid leakage under high pressure.

[0031] In addition, such as Figure 2 As shown, the bolt holes 26 on the oil return port 22 are designed to fix the bolts 13, ensuring a tight connection between the sealing structure 2 and the outer cylinder 12. This design not only improves the overall structural strength of the jack, but also distributes the force through the evenly distributed bolt holes 26, reducing the risk of the rear cover popping out under high pressure.

[0032] In summary, this utility model, through the design of an integrated front cover flange sealing enhanced jack, significantly improves the sealing performance and structural stability of the jack under high pressure, effectively solving the problems of easy rear cover popping out, poor sealing performance, and high operational risks of traditional jacks, and providing a safer and more reliable solution for prestressed construction.

[0033] like Figure 2 and Figure 3As shown, further, the middle cylinder 11 has an inner cylinder 15 that penetrates itself, the outer cylinder 12, and the sealing structure 2. Part of the inner cylinder 15 is located outside the outer cylinder 12 and is connected to a locking nut via a locking nut 16 and a locking washer. A second oil-filling end 17 is provided on one side of the locking nut 16. The outer cylinder 12 has a push end 18 integrated with the middle cylinder 11. Sealing rings 19 are embedded on the side of the push end 18 closest to both the outer cylinder 12 and the inner cylinder 15. The sealing structure 2 and the push end 18 are both in close contact with the outer cylinder 12 and the middle cylinder 11.

[0034] In this embodiment, the inner cylinder 15 provides additional structural support and sealing performance for the jack. The inner cylinder 15 extends through the middle cylinder 11, outer cylinder 12, and sealing structure 2, ensuring the stability and sealing of the jack when prestress is applied. Part of the inner cylinder 15 is located outside the outer cylinder 12 and is connected to a locking nut via a locking nut 16 and a locking washer. This design not only enhances the stability of the inner cylinder 15 but also prevents it from loosening or falling off under high pressure.

[0035] A second oil-filling end 17 is provided on one side of the locking nut 16, providing an additional air-filling channel for the jack and ensuring flexibility and adaptability under different working conditions. The outer cylinder 12 has a push end 18 that is integrated with the middle cylinder 11. The push end 18 is fitted with sealing rings 19 on the side near the outer cylinder 12 and the inner cylinder 15, further enhancing the sealing performance of the jack and preventing liquid leakage.

[0036] Both the sealing structure 2 and the pushing end 18 are tightly attached to the outer cylinder 12 and the middle cylinder 11. This design ensures the structural stability and sealing performance of the jack under high pressure, effectively prevents the rear cover from popping out and liquid leakage, and improves the safety and reliability of the jack.

[0037] In summary, this utility model, through the design of an integrated front cover flange sealing enhanced jack, combined with the optimized design of the inner cylinder 15, locking nut 16, stop washer, anti-reverse nut, second oil filling end 17, pushing end 18 and sealing retaining ring 19, significantly improves the sealing performance and structural stability of the jack under high pressure environment, effectively solves the problems of easy back cover popping out, poor sealing performance and high operation risk of traditional jacks, and provides a safer and more reliable solution for prestressed construction.

[0038] In use, firstly, install the integrated front cover flange-sealed reinforced jack into the predetermined working position, ensuring that the jack body 1 is stable and correctly aligned with the prestressing tendon. Next, high-pressure gas is injected into the air chamber 25 inside the jack through the first inflation end 14 and the second inflation end 17, pushing the inner cylinder 15 and the middle cylinder 11 to move synchronously, thereby applying the required tension force to the prestressing tendon. During this process, the flange sealing cover 21 and the convex ring 22 in the sealing structure 2, as well as the sealing element 27 in the groove 23, work together to ensure that the high-pressure gas does not leak, while the bolts on the convex ring 22... Hole 26 is tightly connected to the outer cylinder 12 via fixing bolt 13, enhancing the stability of the overall structure. Subsequently, when the prestressing tendon reaches the predetermined tension, the inner cylinder 15 is fixed in position by locking nut 16 and locking washer in conjunction with anti-reverse nut to maintain the tension of the prestressing tendon. Finally, high-pressure gas is released, causing the middle cylinder 11 and inner cylinder 15 to return to their initial positions under the action of return spring, completing one tensioning operation. The sealing ring 19 on the push end 18 provides additional sealing protection during this process, ensuring the sealing performance of the jack and operational safety throughout the tensioning process. Through the above steps, this device can safely and effectively apply prestress under high pressure, while reducing operational risks and improving project quality and construction efficiency.

[0039] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. An integrated front cover flange sealing enhanced jack, comprising a jack body (1), a middle cylinder (11) located inside the jack body (1), and an outer cylinder (12) sleeved on the outside of one end of the middle cylinder (11), characterized in that: The outer cylinder (12) is connected to a sealing structure (2) by a fixing bolt (13) at one end near the middle section of the middle cylinder (11). The sealing structure (2) includes a flange sealing cover (21) and an oil return port (22). The flange sealing cover (21) and the oil return port (22) are integrated. The flange sealing cover (21) has several grooves (23) on the side near the middle cylinder (11). The oil return port (22) is connected to the first oil filling end (14) through the mounting groove (24) at the end away from the middle cylinder (11). The sealing structure (2) is located between the middle cylinder (11) and the outer cylinder (12).

2. The integrated front cover flange sealing enhanced jack according to claim 1, characterized in that: The middle cylinder (11) has an inner cylinder (15) that runs through itself, the outer cylinder (12) and the sealing structure (2), and part of the inner cylinder (15) is located outside the outer cylinder (12).

3. The integrated front cover flange sealing enhanced jack according to claim 2, characterized in that: The inner cylinder (15) is fitted with a locking nut (16) corresponding to itself at one end outside the outer cylinder (12). The locking nut (16) is connected to a backstop nut by a stop washer on the side away from the outer cylinder (12). Both the stop washer and the backstop nut are fitted outside the inner cylinder (15).

4. The integrated front cover flange sealing enhanced jack according to claim 3, characterized in that: The locking nut (16) has a second oil filling end (17) that passes through the outer cylinder (12) on one side. The outer cylinder (12) has a push end (18) that is penetrated by the inner cylinder (15) and integrated with the middle cylinder (11). The push end (18) is fitted with a sealing ring (19) on the side of the outer cylinder (12) and the inner cylinder (15).

5. The integrated front cover flange sealing enhanced jack according to claim 4, characterized in that: The sealing structure (2) and the pushing end (18) are both in close contact with the outer cylinder (12) and the middle cylinder (11). An oil chamber (25) is left between the middle cylinder (11) and the outer cylinder (12). The mounting groove (24) is provided with an oil filling channel that passes through the return oil port (22) and communicates with the oil chamber (25) at one end away from the first oil filling end (14).

6. The integrated front cover flange sealing enhanced jack according to claim 1, characterized in that: The oil return port (22) is provided with several evenly distributed bolt holes (26) corresponding to the mounting bolts (13). The groove (23) is provided with sealing elements (27), which include sealing rings, retaining rings and dustproof rings.

Images