Connecting pipe fitting for double-sealing type PHC pipe pile

Abstract

The invention provides a double-sealing type PHC pipe pile connecting pipe fitting, and relates to the technical field of pipe fitting connection, the double-sealing type PHC pipe pile connecting pipe fitting comprises an adapting pipe, a sealing mechanism for sealing is arranged on the adapting pipe, a fixing mechanism for pipe fitting fixing is arranged on the adapting pipe, and the sealing mechanism comprises a side edge block, a movable block, a clamping plate, an adjusting disc, a fixing disc and a sealing sleeve. The fixing mechanism comprises two inserting pipes, and the two inserting pipes are fixedly installed at the ends of the two sides of the adapting pipe correspondingly. According to the device, the conical rubber sleeve, the flange plate, the clamping plate and the sealing sleeve are matched, the clamping plate is matched with the sealing sleeve to dynamically adjust the radial pressure on the rubber sleeve, primary sealing is achieved, mechanical design is formed through the conical rubber sleeve and the flange plate, secondary sealing is formed, and therefore the double-sealing effect is achieved when the PHC pipe fitting is fixed in a matched mode; the device can adapt to certain piling impact load and construction vibration.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipe fittings connection, and more specifically, particularly relates to a connecting pipe fitting for double-sealed PHC pipe piles. Background Art

[0002] PHC pipe fittings usually refer to prestressed high-strength concrete pipe piles. In engineering applications, PHC pipe fittings usually need to be connected into an integral structure, and thus it is necessary to connect each pipe pile through a connecting piece so that they can jointly bear the load of the upper structure.

[0003] Chinese Patent Publication No.: CN118816018A, a sealing connection pipe fitting applied to PHC pipe piles. In this invention, a first sealing ring and a second sealing ring will be respectively clamped into a second sealing groove and a first sealing groove, and thus a double-layer seal can be provided at the connection between the active connecting piece and the passive connecting piece, improving the overall sealing performance of the device, avoiding the problem of leakage when the first PHC pipe and the second PHC pipe are in use, and improving the practicability.

[0004] Existing PHC pipe pile connecting pieces have the following disadvantages:

[0005] 1. Existing connecting pieces mostly rely on flanges and clamps for fixation, requiring the ellipticity of the PHC pipe end to be ≤ 0.5 mm, while the actual production tolerance of the pipe fittings reaches ±3 mm. When there are certain production tolerances or size mismatches in the pipe fittings, it will affect the sealing effect of the pipe fittings, with poor adaptability and a low adaptation range;

[0006] 2. Existing pipe fittings are fixed by welding or bolts during connection. Welding or bolt flanges cannot adapt to the dynamic deformation during the construction of PHC pipe piles. They are mostly single-point fixations, with relatively concentrated stress, which may cause brittle cracking of PHC concrete and affect the quality of the pipe fittings.

[0007] In view of this, research and improvement are carried out on the existing structure and deficiencies, and a connecting pipe fitting for double-sealed PHC pipe piles is provided with the expectation of achieving a more practical value. Summary of the Invention

[0008] In order to solve the above technical problems, the present invention provides a connecting pipe fitting for double-sealed PHC pipe piles to solve the above problems.

[0009] A connecting fitting for a double-sealed PHC pipe pile, including a receiving pipe, a sealing mechanism for sealing is provided on the receiving pipe, a fixing mechanism for fixing the fitting is provided on the receiving pipe, the sealing mechanism includes a side block, a movable block, a clamping plate, an adjusting disc, a fixing disc and a sealing sleeve, the fixing mechanism includes an insertion pipe, the number of the insertion pipes is two, and the two insertion pipes are respectively fixedly installed at both end parts of the receiving pipe, the side block is fixedly installed at the circumferential end part of the receiving pipe, the movable block is located at the upper end part of the side block, the number of the clamping plates is at least two, each clamping plate is located on the inner side wall of the receiving pipe, the adjusting disc is rotatably installed on the inner side wall of the receiving pipe, the fixing disc is fixedly installed on the inner side wall of the receiving pipe, each clamping plate is located between the adjusting disc and the fixing disc, a movable groove is penetratingly opened at the side end part of the receiving pipe, sealing grooves are opened at both upper and lower end parts of the movable groove, outer connecting pipes are fixedly installed at the side end parts of the two insertion pipes, flange plates are fixedly installed at the circumferential end parts of the two outer connecting pipes, conical rubber sleeves are fixedly installed on the inner side walls of the two outer connecting pipes, a column is fixedly installed at the upper end part of the side block, a circular groove is penetratingly opened at the upper end part of the side block, a threaded rod is rotatably installed on the inner side wall of the circular groove, a cylindrical groove and a threaded groove are penetratingly opened at the upper end part of the movable block, a movable column is fixedly installed at the side end part of the movable block, the movable block is slidably installed on the circumferential end part of the column through the cylindrical groove, the threaded rod is threadedly rotatably installed on the inner side wall of the threaded groove, a transmission column is penetratingly opened at the side end part of each clamping plate, a plurality of arc grooves are penetratingly arrayed at the side end part of the adjusting disc, a side push rod is fixedly installed at the circumferential end part of the adjusting disc, the side push rod is slidably installed on the inner side wall of the movable groove, an adjusting groove is penetratingly opened at the side end part of the side push rod, and two sealing gaskets are fixedly installed at the circumferential end part of the adjusting disc, and the two sealing gaskets are respectively slidably installed on the inner side walls of the two sealing grooves.

[0010] Preferably, a plurality of inclined grooves are penetratingly arrayed at the side end part of the fixing disc, and the end part of each transmission column is slidably installed on the inner side wall of the inclined groove.

[0011] Preferably, connecting rings are fixedly installed at both end parts of the sealing sleeve, and the two connecting rings are fixedly installed on the inner side wall of the receiving pipe.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the present invention, by providing a conical rubber sleeve to fix the end part of the PHC pipe fitting, when the PHC pipe fitting is inserted into the inner cavity of the conical rubber sleeve, the inner cavity of the conical rubber sleeve is conical, and the rubber generates radial compression deformation due to the taper, forming an interference fit with the pipe wall to achieve pressure-enhanced sealing.

[0014] In the present invention, by providing a tapered rubber sleeve and a flange plate in cooperation, the flange plate provides axial rigid constraint through bolt pre-tightening, resists the hammer impact force of the PHC pipe pile and the long-term lateral soil pressure, and the tapered rubber sleeve absorbs local stress concentration to avoid brittle cracking of PHC concrete. The tapered rubber sleeve and the flange plate form a "rigid outside and flexible inside" structure, which improves the energy absorption rate under dynamic loads and ensures stable fixation.

[0015] In the present invention, by providing an adjusting disk, a clamping plate and a fixing disk in cooperation to tighten and seal the sealing sleeve, the array of clamping plates synchronously radially contracts by rotating the adjusting disk, which can adapt to different diameters of the outer diameter of the PHC pipe fitting, and has good adaptability. Moreover, when there are certain production errors in the pipe pile, uniform sealing can still be achieved, improving the adaptation range of the device when sealing the PHC pipe fitting.

[0016] In the present invention, by providing an array of clamping plates for fixation, the array of clamping plates converts the pre-tightening force into a multi-vane radially evenly distributed pressure, making the distribution of the clamping force more uniform, avoiding local stress concentration caused by traditional single-point clamping, and avoiding the situation of local overload causing PHC concrete to be crushed, ensuring the clamping and sealing effect while avoiding damage to the PHC pipe fitting.

[0017] In the present invention, by providing a tapered rubber sleeve, a flange plate, a clamping plate and a sealing sleeve in cooperation, the radial pressure of the rubber sleeve is dynamically adjusted through the cooperation of the clamping plate and the sealing sleeve to achieve a primary seal, and a mechanical design is formed by the tapered rubber sleeve and the flange plate to form a secondary seal. In this way, when the PHC pipe fitting is fixed, a double-sealing effect is achieved, which can adapt to a certain pile driving impact load, adapt to construction vibration, and ensure the sealing effect between pipe fittings during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the receiving pipe of the present invention;

[0019] Figure 2 is a schematic structural diagram of the inserted pipe of the present invention;

[0020] Figure 3 is a schematic cross-sectional structural diagram of the inserted pipe of the present invention;

[0021] Figure 4 is a schematic structural diagram of the tapered rubber sleeve of the present invention;

[0022] Figure 5 is a schematic structural diagram of the sealing sleeve of the present invention;

[0023] Figure 6 is a schematic structural diagram of the adjusting disk of the present invention;

[0024] Figure 7 is a schematic structural diagram of the side block of the present invention;

[0025] Figure 8 This is a schematic structural diagram of the clamping plate of the present invention.

[0026] In the figure, the corresponding relationship between the component names and the drawing reference numerals is as follows: 1, receiving pipe; 11, movable groove; 12, sealing groove; 2, inserting pipe; 21, conical rubber sleeve; 22, outer connecting pipe; 23, flange; 3, side block; 31, column; 32, circular groove; 33, threaded rod; 4, movable block; 41, cylindrical groove; 42, threaded groove; 43, movable column; 5, clamping plate; 51, transmission column; 6, adjusting disc; 61, arc groove; 62, sealing gasket; 63, adjusting groove; 64, side push rod; 7, fixed disc; 71, inclined groove; 8, sealing sleeve; 81, connecting ring. Specific embodiments

[0027] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0028] Please refer to Figures 1-8 , the present invention provides a double-sealed connecting fitting for PHC pipe piles, including a receiving pipe 1. A sealing mechanism for sealing is provided on the receiving pipe 1, and a fixing mechanism for fixing the pipe fitting is provided on the receiving pipe 1. The sealing mechanism includes a side block 3, a movable block 4, a clamping plate 5, an adjusting disc 6, a fixed disc 7, and a sealing sleeve 8. The fixing mechanism includes an inserting pipe 2. PHC pipe fittings generally refer to prestressed high-strength concrete pipe piles. In engineering applications, PHC pipe fittings usually need to be connected into an integral structure. For example, in building foundation engineering, each pipe pile can be connected through a connecting piece so that they can jointly bear the load of the upper structure. The user can insert the two ends of the PHC pipe fitting into the two ends of the outer connecting pipe 22 of the present device, and by adjusting the angle of the adjusting disc 6, drive each clamping plate 5 to clamp the ends of the pipe fittings on both sides;

[0029] The number of the insertion pipes 2 is two. The two insertion pipes 2 are respectively fixedly installed at both end parts on the sides of the receiving pipe 1. The side blocks 3 are fixedly installed at the circumferential end part of the receiving pipe 1. The movable block 4 is located at the upper end part of the side block 3. The number of the clamping plates 5 is at least two. Each of the clamping plates 5 is located on the inner side wall of the receiving pipe 1. The adjusting disc 6 is rotatably installed on the inner side wall of the receiving pipe 1. The fixed disc 7 is fixedly installed on the inner side wall of the receiving pipe 1. Each clamping plate 5 is located between the adjusting disc 6 and the fixed disc 7. A movable groove 11 is penetratingly opened at the side end part of the receiving pipe 1. Sealing grooves 12 are opened at both upper and lower end parts of the movable groove 11. Outer connecting pipes 22 are fixedly installed at the side end parts of the two insertion pipes 2. Flange plates 23 are fixedly installed at the circumferential end parts of the two outer connecting pipes 22. Conical rubber sleeves 21 are fixedly installed on the inner side walls of the two outer connecting pipes 22. When a user connects PHC pipe fittings, the end of the PHC pipe fitting can be inserted into the inner side wall of the conical rubber sleeve 21 inside the outer connecting pipe 22. The inner cavity of the conical rubber sleeve 21 is conical and can adapt to the sizes of the pipe orifices of different PHC pipe fittings. The user can insert the end of the PHC pipe fitting into the position at the end of the receiving pipe 1, that is, into the inner side wall of the sealing sleeve 8. Through the cooperation of the flange on the PHC pipe fitting and the flange plate 23, the PHC pipe fitting is fixed;

[0030] A column 31 is fixedly installed at the upper end part of the side block 3. A circular groove 32 is penetratingly opened at the upper end part of the side block 3. A threaded rod 33 is rotatably installed on the inner side wall of the circular groove 32. A cylindrical groove 41 and a threaded groove 42 are penetratingly opened at the upper end part of the movable block 4. A movable column 43 is fixedly installed at the side end part of the movable block 4. The movable block 4 is slidably installed on the circumferential end part of the column 31 through the cylindrical groove 41. The threaded rod 33 is threadedly rotatably installed on the inner side wall of the threaded groove 42. After inserting the PHC pipe fittings on both sides into the inner side wall of the sealing sleeve 8 inside the receiving pipe 1, the user can adjust the positions of each clamping plate 5 to clamp the sealing sleeve 8. The user can rotate the threaded rod 33. The rotation of the threaded rod 33 drives the movable block 4 to move upward through the threaded groove 42. The movement of the movable block 4 drives the movement of the movable column 43;

[0031] A transmission column 51 is penetrated through the side end of each clamping plate 5, a plurality of arc grooves 61 are penetrated through the side end array of the adjusting disk 6, a side push rod 64 is fixedly installed on the circumferential end of the adjusting disk 6, and the side push rod 64 is slidably installed on the inner side wall of the movable groove 11, and an adjustment groove 63 is penetrated through the side end of the side push rod 64, and two sealing gaskets 62 are also fixedly installed on the circumferential end of the adjusting disk 6, and the two sealing gaskets 62 are respectively slidably installed on the inner side walls of the two sealing grooves 12, and a plurality of inclined grooves 71 are penetrated through the side end array of the fixed disk 7, and the end of each transmission column 51 is slidably installed on the inner side wall of the inclined groove 71, and the two side ends of the sealing sleeve 8 are fixed A connecting ring 81 is installed, and the two connecting rings 81 are fixedly installed on the inner wall of the receiving tube 1. The movable column 43 moves in the adjusting groove 63 to drive the side push rod 64 to rotate, and the rotation of the side push rod 64 will drive the two sealing pads 62 to slide in the sealing groove 12 respectively. The rotation of the side push rod 64 will drive the adjusting disk 6 to rotate, and the rotation of the adjusting disk 6 will drive each arc groove 61 to rotate. The rotation of each arc groove 61 will drive each transmission column 51 to move. Because the end of the other side of each transmission column 51 is located in the inclined groove 71, each clamping plate 5 will slide close to each other at this time, and then clamp the sealing sleeve 8 to fix it, so that the sealing sleeve 8 fits the circumferential end of the PHC pipe fitting.

[0032] Working principle:

[0033] In the first step, PHC pipe fittings usually refer to prestressed high-strength concrete pipe piles. PHC pipe fittings usually need to be connected into an integral structure in engineering applications. For example, in building foundation engineering, the pipe piles are connected by connecting pieces so that they can bear the load of the upper structure together. The user can plug the two ends of the PHC pipe fittings into the two ends of the external pipe 22 in the device, and drive each clamping plate 5 to clamp the ends of the pipe fittings on both sides by adjusting the angle of the adjusting disk 6;

[0034] In the second step, when the user connects the PHC pipe fitting, the user can insert the end of the PHC pipe fitting into the inner wall of the tapered rubber sleeve 21 in the external pipe 22. The inner cavity of the tapered rubber sleeve 21 is tapered and can adapt to the sizes of different PHC pipe openings. The user can insert the end of the PHC pipe fitting into the terminal position of the receiving pipe 1, that is, into the inner wall of the sealing sleeve 8, and fix the PHC pipe fitting by matching the flange on the PHC pipe fitting with the flange plate 23;

[0035] The device fixes the end of the PHC pipe by setting a conical rubber sleeve 21. When the PHC pipe is inserted into the inner cavity of the conical rubber sleeve 21, the inner cavity of the conical rubber sleeve 21 is conical, and the rubber is radially compressed and deformed due to the taper, forming an interference fit with the pipe wall, thereby realizing pressure-enhanced sealing.

[0036] This device is configured with a tapered rubber sleeve 21 and a flange 23 in cooperation. The flange 23 provides axial rigid constraints through bolt pre-tightening to resist the hammer impact force of the PHC pipe pile and the long-term lateral soil pressure. The tapered rubber sleeve 21 absorbs local stress concentration to avoid brittle cracking of the PHC concrete. The tapered rubber sleeve 21 and the flange 23 form a "rigid outside and flexible inside" structure, which improves the energy absorption rate under dynamic loads and ensures stable fixation.

[0037] In the third step, after inserting the PHC pipe fittings on both sides into the inner sidewall of the sealing sleeve 8 of the receiving pipe 1, the user can adjust the position of each clamping plate 5 to clamp the sealing sleeve 8. The user can rotate the threaded rod 33. When the threaded rod 33 rotates, it drives the movable block 4 to move upward through the threaded groove 42. The movement of the movable block 4 drives the movement of the movable column 43. When the movable column 43 moves in the adjustment groove 63, it drives the side push rod 64 to rotate. The rotation of the side push rod 64 drives the two sealing gaskets 62 to slide in the sealing grooves 12 respectively. The rotation of the side push rod 64 drives the adjustment disc 6 to rotate. The rotation of the adjustment disc 6 drives the rotation of each arc groove 61. The rotation of each arc groove 61 drives the movement of each transmission column 51. Since the end of the other side of each transmission column 51 is located in the inclined groove 71, at this time, each clamping plate 5 will slide closer to each other, thereby clamping and fixing the sealing sleeve 8, making the sealing sleeve 8 fit the circumferential end of the PHC pipe fitting.

[0038] This device is configured with an adjustment disc 6, clamping plates 5 and a fixed disc 7 in cooperation to tighten and seal the sealing sleeve 8. The array of clamping plates 5 radially contracts synchronously by rotating the adjustment disc 6, which can adapt to different diameters of the outer diameter of the PHC pipe fitting, with good adaptability. And when there are certain production errors in the pipe pile, uniform sealing can still be achieved, improving the adaptability range of this device when sealing the PHC pipe fitting.

[0039] This device is fixed by arranging an array of clamping plates 5. The array of clamping plates 5 converts the pre-tightening force into a multi-blade radially evenly distributed pressure, making the distribution of the clamping force more uniform, avoiding local stress concentration caused by traditional single-point clamping, and avoiding the situation of PHC concrete being crushed due to local overload, ensuring the clamping and sealing effect while avoiding damage to the PHC pipe fitting.

[0040] This device is configured with a tapered rubber sleeve 21, a flange 23, clamping plates 5 and a sealing sleeve 8 in cooperation. Through the dynamic adjustment of the clamping plates 5 and the sealing sleeve 8 to the radial pressure of the rubber sleeve, a primary seal is achieved. Through the mechanical design formed by the tapered rubber sleeve 21 and the flange 23, a secondary seal is formed. In this way, when the PHC pipe fitting is fixed, a double-seal effect is achieved. It can adapt to a certain pile driving impact load and construction vibration, ensuring the sealing effect between the pipe fittings during use.

[0041] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A double-sealed PHC pipe pile connecting pipe, comprising a receiving pipe (1), characterized in that: The receiving pipe (1) is provided with a sealing mechanism for sealing, and the receiving pipe (1) is provided with a fixing mechanism for fixing the pipe fitting; The sealing mechanism comprises a side block (3), a movable block (4), a clamping plate (5), an adjusting disk (6), a fixed disk (7) and a sealing sleeve (8); the fixed mechanism comprises a plug-in tube (2); the number of the plug-in tubes (2) is two, and the two plug-in tubes (2) are respectively fixedly mounted on the two side ends of the receiving tube (1); the side block (3) is fixedly mounted on the circumferential end of the receiving tube (1); the movable block (4) is located at the upper end of the side block (3); the number of the clamping plates (5) is at least two, and each of the clamping plates (5) is located on the inner side wall of the receiving tube (1); the adjusting disk (6) is rotatably mounted on the inner side wall of the receiving tube (1); the fixed disk (7) is fixedly mounted on the inner side wall of the receiving tube (1); and each of the clamping plates (5) is located between the adjusting disk (6) and the fixed disk (7).

2. A double-sealed PHC pile connecting pipe fitting as claimed in claim 1, characterized in that: A movable groove (11) is provided through the side end of the receiving tube (1), and sealing grooves (12) are provided at both the upper and lower ends of the movable groove (11).

3. A double-sealed PHC pile connecting pipe fitting as claimed in claim 2, characterized in that: The side ends of the two plug-in tubes (2) are fixedly mounted with external tubes (22), and the circumferential ends of the two external tubes (22) are fixedly mounted with flanges (23); Wherein, the inner side walls of the two external pipes (22) are both fixedly mounted with conical rubber sleeves (21).

4. A double-sealed PHC pile connecting pipe fitting as claimed in claim 3, characterized in that: A column (31) is fixedly mounted on the upper end of the side block (3), a circular groove (32) is penetrated through the upper end of the side block (3), and a threaded rod (33) is rotatably mounted on the inner side wall of the circular groove (32).

5. A double-sealed PHC pile connecting pipe fitting as claimed in claim 4, characterized in that: A columnar groove (41) and a threaded groove (42) are formed through the upper end of the movable block (4), and a movable column (43) is fixedly mounted on the side end of the movable block (4).

6. A double-sealed PHC pile connecting pipe fitting as claimed in claim 5, characterized in that: The movable block (4) is slidably mounted on the circumferential end of the column (31) through a cylindrical groove (41), and the threaded rod (33) is threadably mounted on the inner side wall of the threaded groove (42).

7. A double-sealed PHC pile connecting pipe fitting as claimed in claim 6, characterized in that: A transmission column (51) is provided through the side end of each clamping plate (5), a plurality of arc grooves (61) are provided through the side end of the adjustment disk (6), and a side push rod (64) is fixedly mounted on the circumferential end of the adjustment disk (6).

8. A double-sealed PHC pile connecting pipe fitting as claimed in claim 7, characterized in that: The side push rod (64) is slidably mounted on the inner side wall of the movable groove (11); an adjustment groove (63) is penetrated through the side end of the side push rod (64); two sealing gaskets (62) are fixedly mounted on the circumferential end of the adjustment disk (6); and the two sealing gaskets (62) are respectively slidably mounted on the inner side walls of the two sealing grooves (12).

9. A double-sealed PHC pile connecting pipe fitting as claimed in claim 8, characterized in that: A plurality of inclined slots (71) are arranged in an array through the side end of the fixed plate (7), and the end of each transmission column (51) is slidably mounted on the inner side wall of the inclined slot (71).

10. A double-sealed PHC pile connecting pipe fitting as claimed in claim 9, characterized in that: Connecting rings (81) are fixedly mounted on both side ends of the sealing sleeve (8), and the two connecting rings (81) are fixedly mounted on the inner side wall of the receiving tube (1).

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