An adjustable tensioning device

Abstract

The utility model provides a kind of adjustable tensioner belongs to shield machine equipment field, including tensioning support assembly and drive assembly;Tensioning support assembly includes oil cylinder barrel, the utility model: piston rod is equipped in the inside of oil cylinder barrel, piston rod is connected in the inside of oil cylinder barrel by the piston head piston of one end installation, the inside of one end of oil cylinder barrel is equipped with guide sleeve, piston rod keeps linear movement along guide sleeve in the inside of oil cylinder barrel, one end of piston rod is installed limit sleeve near piston head and plays the role of limiting, the grease nipple of both ends of oil cylinder barrel is convenient for grease to realize piston rod telescopic movement from both ends, by design oil cylinder barrel structure, high-pressure grease is injected into rod cavity or rodless cavity in oil cylinder barrel, the piston rod retraction or extension of adjustable tensioning support device, to achieve the purpose of large load tensioning or support, while the length range of adjustable tensioning or support device adjustment is large, adjustment is simple, and interchangeability, strong universality.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine equipment, specifically an adjustable tensioning device. Background Technology

[0002] With the rapid development of tunnel construction technology and theory in my country and the increasing level of mechanization, the number of tunnel projects using tunnel boring machines (TBMs) is growing rapidly. Many internal components of TBMs need to be tightened or supported. Commonly used tightening and support mechanisms are divided into two types: fixed and non-adjustable, and adjustable. Fixed non-adjustable mechanisms are all dedicated and have poor interchangeability and versatility. Adjustable mechanisms generally use threaded connection structures, which are adjustable in length and have strong interchangeability and versatility. However, threaded connection structures have some drawbacks. When the load is large, it is difficult to adjust the threaded mechanism, and a force-adding device is required. However, the internal space of the TBM is limited, making it difficult to install a force-adding device. Moreover, the adjustable length range of the threaded mechanism is relatively small, which is quite limiting. Utility Model Content

[0003] The purpose of this invention is to provide an adjustable tensioning device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an adjustable tensioning device, comprising a tensioning support assembly and a drive assembly;

[0005] The tensioning support assembly includes a hydraulic cylinder, a piston rod is inserted inside the hydraulic cylinder, a piston head is fixedly installed at one end of the piston rod, the piston rod is connected to the inside of the hydraulic cylinder through the piston head, a guide sleeve is fixedly installed at one end of the hydraulic cylinder, the piston rod is movably inserted inside the guide sleeve, a limit sleeve is installed at one end of the piston rod near the piston head, and grease fittings are connected to both ends of the top of the hydraulic cylinder.

[0006] The drive assembly includes a grease can, inside which a gear pump is installed. A grease supply pipe is installed at the output end of the gear pump. A multi-way solenoid valve is installed at one end of the grease supply pipe. A first delivery pipe and a second delivery pipe are installed on the surface of the multi-way solenoid valve. One end of the first delivery pipe and the second delivery pipe are respectively connected to grease fittings at both ends of the top of the cylinder. A return pipe is installed on the back of the multi-way solenoid valve and extends into the grease can.

[0007] As a preferred embodiment of this utility model, a connecting lug is fixedly installed at one end of both the piston rod and the cylinder barrel.

[0008] As a preferred embodiment of this utility model: a lid is installed on one side of the top of the butter bucket, and a discharge port is provided at the bottom of the surface of the butter bucket.

[0009] As a preferred embodiment of this utility model, a fixing seat is fixedly installed at the bottom of the cylinder barrel.

[0010] As a preferred embodiment of this utility model, a pressure gauge is installed on the surface of the oil supply pipe.

[0011] As a preferred embodiment of this utility model: a manual reversing valve is installed in the middle of the first conveying pipe and the second conveying pipe, and a rocker arm is installed on the surface of the grease bucket, one end of which is connected to the gear pump drive shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) A piston rod is provided inside the cylinder barrel. The piston rod is connected to the piston inside the cylinder barrel through a piston head installed at one end. A guide sleeve is installed inside one end of the cylinder barrel. The piston rod moves in a straight line along the guide sleeve inside the cylinder barrel. A limit sleeve is installed near the piston head at one end of the piston rod to limit the movement. Grease nipples are installed at both ends of the cylinder barrel to facilitate the entry and exit of grease from both ends to realize the extension and retraction of the piston rod. By designing the cylinder barrel structure, high-pressure grease is added to the rod chamber or rodless chamber inside the cylinder barrel. The piston rod of the adjustable tensioning support device retracts or extends, thereby achieving the purpose of tensioning or supporting under large loads. At the same time, the adjustable tensioning or support device has a large adjustment range and is easy to adjust. It is also highly interchangeable and versatile.

[0014] (2) A manual reversing valve is installed in the middle of the first and second delivery pipes. A rocker arm is installed on the surface of the grease bucket and is connected to the drive shaft of the gear pump, so that the piston rod can be controlled by manually pumping grease in environments where power supply is inconvenient. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the present invention.

[0017] Figure 3 This is a schematic diagram of the disassembled structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the insulation protection component of this utility model.

[0019] In the diagram: 1. Tensioning support assembly; 101. Hydraulic cylinder; 102. Piston rod; 103. Piston head; 104. Guide sleeve; 105. Limiting sleeve; 106. Grease fitting;

[0020] 2. Drive assembly; 21. Grease container; 22. Gear pump; 23. Oil supply pipe; 24. Multi-way solenoid valve; 25. First delivery pipe; 26. Second delivery pipe; 27. Return pipe;

[0021] 3. Connecting ear plate; 4. Bucket lid; 5. Discharge port; 6. Fixing base; 7. Pressure gauge;

[0022] 8. Manual directional valve; 9. Rocker arm. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Please see Figure 1 - Figure 4 An adjustable tensioning device includes: a tensioning support assembly 1 and a drive assembly 2;

[0025] Please see Figure 1 , Figure 3 The tensioning support assembly 1 includes a hydraulic cylinder 101, a piston rod 102 is inserted inside the hydraulic cylinder 101, a piston head 103 is fixedly installed at one end of the piston rod 102, the piston rod 102 is piston-connected to the inside of the hydraulic cylinder 101 through the piston head 103, a guide sleeve 104 is fixedly installed at one end of the hydraulic cylinder 101, the piston rod 102 is movably inserted inside the guide sleeve 104, a limit sleeve 105 is installed at one end of the piston rod 102 near the piston head 103, and grease fittings 106 are connected to both ends of the top of the hydraulic cylinder 101.

[0026] In practical use: A piston rod 102 is provided inside the cylinder 101. The piston rod 102 is connected to the inside of the cylinder 101 via a piston head 103 installed at one end. A guide sleeve 104 is installed inside one end of the cylinder 101. The piston rod 102 moves linearly inside the cylinder 101 along the guide sleeve 104. A limit sleeve 105 is installed near the piston head 103 at one end of the piston rod 102 to limit its movement. Grease nipples 106 are installed at both ends of the cylinder 101 to facilitate the entry and exit of grease, thereby enabling the piston rod 102 to extend and retract. By designing the structure of the cylinder 101, high-pressure grease is injected into the rod-containing or rodless chamber of the cylinder 101, causing the piston rod 102 of the adjustable tensioning support device to retract or extend, thereby achieving the purpose of tensioning or supporting under large loads. At the same time, the adjustable tensioning or support device has a wide range of adjustable lengths, is easy to adjust, and has strong interchangeability and versatility.

[0027] Please see Figure 2 , Figure 4 The drive assembly 2 includes a grease tank 21, inside which a gear pump 22 is installed. A grease supply pipe 23 is installed at the output end of the gear pump 22. A multi-way solenoid valve 24 is installed at one end of the grease supply pipe 23. A first delivery pipe 25 and a second delivery pipe 26 are installed on the surface of the multi-way solenoid valve 24. One end of the first delivery pipe 25 and the second delivery pipe 26 are respectively connected to the grease nipples 106 at both ends of the top of the cylinder barrel 101. A return pipe 27 is installed on the back of the multi-way solenoid valve 24 and extends into the grease tank 21.

[0028] In practical use: A gear pump 22 is installed inside the grease container 21. The gear pump 22 delivers grease to the grease supply pipe 23. A multi-way solenoid valve 24 is installed at one end of the grease supply pipe 23. A first delivery pipe 25 and a second delivery pipe 26 are installed on the surface of the multi-way solenoid valve 24. One end of the first delivery pipe 25 and the second delivery pipe 26 are respectively connected to the grease fittings 106 at both ends of the top of the cylinder 101. The multi-way solenoid valve 24 controls the connection between the grease supply pipe 23 and the first delivery pipe 25. At this time, grease is injected into the rod chamber and subjected to the pressure of the grease. The piston rod 102 retracts with a large retraction force, thus achieving the purpose of tightening under heavy load. The rodless chamber is connected to the return oil pipe 27 through the second delivery pipe 26, so that the grease is recycled to the grease container 21. When the multi-channel solenoid valve 24 controls the oil supply pipe 23 to connect with the second delivery pipe 26, grease is injected into the rodless chamber. Under the pressure of the grease, the piston rod 102 extends outward with a large thrust, thus achieving the purpose of supporting heavy load. The grease inside the rod chamber is connected to the return oil pipe 27 through the first delivery pipe 25, so that the grease is recycled to the grease container 21.

[0029] Please see Figure 2 Both piston rod 102 and cylinder barrel 101 have connecting lugs 3 fixedly installed at opposite ends.

[0030] In practical use: The piston rod 102 and the opposite end of the cylinder 101 are both connected to connecting lugs 3, which are used to install and connect the tensioning support assembly 1 to the tensioning object.

[0031] Please see Figure 1 A lid 4 is installed on one side of the top of the butter bucket 21, and a discharge port 5 is provided at the bottom of the surface of the butter bucket 21.

[0032] In practical use: The top side of the butter container 21 is equipped with a lid 4 for easy addition of butter, and the bottom surface of the butter container 21 has a drain port 5 for easy replacement of butter regularly.

[0033] Please see Figure 1 , Figure 2 A mounting base 6 is fixedly installed at the bottom of the cylinder barrel 101.

[0034] In practical use: The bottom of the cylinder barrel 101 is equipped with a fixing seat 6 for easy fixing on the surface of the support.

[0035] Please see Figure 2 A pressure gauge 7 is installed on the surface of the oil supply pipe 23.

[0036] In practical use: The pressure gauge 7 installed on the surface of the oil supply pipe 23 is convenient for detecting changes in the grease injection pressure during the oiling process.

[0037] Please see Figure 1 A manual reversing valve 8 is installed in the middle of the first delivery pipe 25 and the second delivery pipe 26. A rocker arm 9 is installed on the surface of the grease bucket 21. One end of the rocker arm 9 is connected to the drive shaft of the gear pump 22.

[0038] In practical use: a manual reversing valve 8 is installed in the middle of the first delivery pipe 25 and the second delivery pipe 26. A rocker arm 9 is installed on the surface of the grease tank 21 and is connected to the drive shaft of the gear pump 22, so that the piston rod 102 can be controlled to extend and retract by manually pumping grease in environments where power supply is inconvenient.

[0039] A piston rod 102 is provided inside the cylinder barrel 101. The piston rod 102 is connected to the inside of the cylinder barrel 101 via a piston head 103 installed at one end. A guide sleeve 104 is installed inside one end of the cylinder barrel 101. The piston rod 102 moves linearly along the guide sleeve 104 inside the cylinder barrel 101. A limit sleeve 105 is installed near the piston head 103 at one end of the piston rod 102 to limit its movement. Grease fittings 106 are installed at both ends of the cylinder barrel 101 to facilitate the entry and exit of grease, thereby enabling the piston rod 102 to extend and retract. By designing the cylinder barrel 101... The structure is as follows: high-pressure grease is injected into the rod-shaped or rodless chamber of the cylinder 101, and the piston rod 102 of the adjustable tensioning and support device retracts or extends, thereby achieving the purpose of tensioning or supporting under large loads. At the same time, the adjustable tensioning or support device has a wide range of adjustable lengths and is easy to adjust. It is also highly interchangeable and versatile. A manual reversing valve 8 is installed in the middle of the first delivery pipe 25 and the second delivery pipe 26. A rocker arm 9 is installed on the surface of the grease tank 21 and is connected to the drive shaft of the gear pump 22 for transmission, which facilitates the control of the piston rod 102 extension and retraction by manually pumping grease in environments where power supply is inconvenient.

[0040] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable tensioning device, characterized in that, include: A tensioning support assembly (1) includes a hydraulic cylinder (101), a piston rod (102) is inserted inside the hydraulic cylinder (101), a piston head (103) is fixedly installed at one end of the piston rod (102), the piston rod (102) is piston-connected to the inside of the hydraulic cylinder (101) through the piston head (103), a guide sleeve (104) is fixedly installed at one end of the hydraulic cylinder (101), the piston rod (102) is movably inserted inside the guide sleeve (104), a limit sleeve (105) is installed at one end of the piston rod (102) near the piston head (103), and grease fittings (106) are connected to both ends of the top of the hydraulic cylinder (101). A drive assembly (2) includes a grease container (21), a gear pump (22) is installed inside the grease container (21), an oil supply pipe (23) is installed at the output end of the gear pump (22), a multi-way solenoid valve (24) is installed at one end of the oil supply pipe (23), a first delivery pipe (25) and a second delivery pipe (26) are installed on the surface of the multi-way solenoid valve (24), one end of the first delivery pipe (25) and the second delivery pipe (26) are respectively connected to the grease nipples (106) at both ends of the top of the cylinder barrel (101), and a return pipe (27) is installed on the back of the multi-way solenoid valve (24), the return pipe (27) extends into the grease container (21).

2. The tensioning device according to claim 1, characterized in that: The piston rod (102) and the cylinder barrel (101) are both fixedly installed with connecting lugs (3) at opposite ends.

3. The tensioning device according to claim 1, characterized in that: A lid (4) is installed on one side of the top of the butter barrel (21), and a discharge port (5) is provided at the bottom of the surface of the butter barrel (21).

4. The tensioning device according to claim 1, characterized in that: A fixing seat (6) is fixedly installed at the bottom of the cylinder barrel (101).

5. The tensioning device according to claim 1, characterized in that: A pressure gauge (7) is installed on the surface of the oil supply pipe (23).

6. The tensioning device according to claim 1, characterized in that: A manual reversing valve (8) is installed in the middle of the first delivery pipe (25) and the second delivery pipe (26). A rocker arm (9) is installed on the surface of the grease bucket (21). One end of the rocker arm (9) is connected to the drive shaft of the gear pump (22).

Images