Guide device of bolt tensioner

Abstract

The utility model relates to the technical field of bolt stretching, and provides a guiding device of a bolt stretcher, which comprises a hydraulic cylinder, a supporting seat and a stretching head, the stretching head is movably embedded in the hydraulic cylinder, a hydraulic piston is arranged in the hydraulic cylinder, and a hydraulic connecting pipe is arranged on the outer surface of the hydraulic cylinder close to the lower end; firstly, the nut is sleeved with the supporting seat, then the supporting seat and the bolt are sleeved with the hydraulic cylinder, then the stretching head is installed on the bolt, the two guide rods are sleeved with the positioning plate through the two through holes, and the limiting stoppers are installed at the tops of the guide rods in a threaded mode, so that the positioning plate cannot be separated from the guide rods, and stability is improved; the two limiting plates are embedded into the stretching head, the two-way screw rod is rotated through the adjusting ring, the two-way screw rod can drive the two limiting plates to move oppositely or oppositely, adjustment is carried out according to the size of the stretching head, the two limiting plates are clamped and embedded into the stretching head, and the stretching head cannot deflect or be clamped during stretching operation.

Description

Technical Field

[0001] This utility model relates to the field of bolt tensioning technology, and in particular to a guide device for a bolt tensioner. Background Technology

[0002] A bolt tensioner, also known as a bolt tensioner, hydraulic bolt tensioner, or hydraulic tensioner, is a specialized tool used for precisely tightening or loosening high-strength bolts. It is widely used in petrochemical, power, bridge, heavy machinery installation and maintenance, and other fields.

[0003] However, in the existing technology, the bolt is not positioned and guided during the stretching process, so the stretching head is prone to deflection or jamming, which reduces the accuracy and safety of the stretching, damages the bolt, and reduces its service life. Moreover, the stretching head is fixed in a fixed manner, and disassembly and assembly are required when the hydraulic piston is reset, which is time-consuming and labor-intensive, thus reducing the efficiency of bolt stretching. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art where bolts are not positioned and guided during tensioning, which can easily lead to the tensioning head becoming skewed or stuck, resulting in reduced tensioning accuracy and safety, bolt damage, and reduced service life. Furthermore, fixing the tensioning head in a fixed manner requires disassembly and assembly during hydraulic piston reset, which is time-consuming and labor-intensive, thus reducing the efficiency of bolt tensioning.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a guide device for a bolt tensioner, comprising: a hydraulic cylinder, a support seat, and a tensioning head, wherein the tensioning head is movably embedded inside the hydraulic cylinder, a hydraulic piston is disposed inside the hydraulic cylinder, a hydraulic connecting pipe is disposed on the outer surface of the hydraulic cylinder near its lower end, two hydraulic connecting pipes are symmetrically positioned, a circular ring plate is fixedly installed at the lower end of the outer surface of the hydraulic cylinder, and a T-shaped annular groove is formed on the outer surface of the circular ring plate, further comprising:

[0006] Both T-shaped ring plates are movably embedded inside the T-shaped ring groove, and the two T-shaped ring plates are symmetrical to each other;

[0007] Two fixing plates are fixedly installed on the top of the two T-shaped ring plates, and guide rods are fixedly installed on the top of the two fixing plates.

[0008] Preferably, a positioning plate is movably fitted onto the outer surface of the two guide rods, and through holes are provided on both sides of the positioning plate.

[0009] The technical effect of adopting the above-mentioned further solution is that the guide rod can limit the positioning plate, so that the positioning plate will not be tilted.

[0010] Preferably, the two through holes are symmetrical, and both guide rods pass through the through holes.

[0011] The technical effect of adopting the above-mentioned further solution is that the positioning plate is installed on the outer surface of the guide rod through the through hole.

[0012] Preferably, an arc-shaped connecting plate is fixedly installed on one side of the two fixed plates, and a limiter is threadedly installed on the top of the two guide rods.

[0013] The technical effect of adopting the above-mentioned further solution is that the arc-shaped connecting plate can drive the two fixed plates to rotate simultaneously.

[0014] Preferably, the outer surface of the positioning plate is provided with a through groove, and rectangular plates are fixedly installed on the two outer surfaces of the positioning plate near the through groove.

[0015] The technical advantage of adopting the above-mentioned further solution is that the rectangular plate can be easily installed with a two-way screw.

[0016] Preferably, a bidirectional screw is movably embedded on the opposite surfaces of the two rectangular plates, and an adjusting ring is fixedly sleeved at the center of the bidirectional screw.

[0017] The technical effect of adopting the above-mentioned further solution is that the bidirectional screw can be rotated through the adjusting ring.

[0018] Preferably, the outer surface of the bidirectional screw is movably fitted with two limiting plates, and the two limiting plates are symmetrical to each other.

[0019] The technical effect of adopting the above-mentioned further solution is that the bidirectional screw can drive the two limiting plates to move relative to each other or in opposite directions.

[0020] Preferably, both limiting plates are movably embedded inside the through groove, and a handle is fixedly installed on one side of the positioning plate.

[0021] The technical effect of adopting the above-mentioned further solution is that the positioning plate can be installed and removed through the handle, and the through groove can limit the limiting plate so that it can only move left and right and will not rotate.

[0022] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0023] 1. In this utility model, the support seat is first fitted onto the nut, then the hydraulic cylinder is fitted onto the support seat and the bolt, and then the stretching head is installed on the bolt. The positioning plate is fitted onto the two guide rods through the two through holes, and the limiter is threaded onto the top of the guide rod. In this way, the positioning plate will not detach from the guide rod, thus improving stability. The two limit plates are embedded inside the stretching head. By rotating the bidirectional screw through the adjusting ring, the bidirectional screw can drive the two limit plates to move relative to or away from each other. Adjustment is made according to the size of the stretching head, so that the two limit plates are locked inside the stretching head. In this way, the stretching head will not be skewed or stuck during the stretching operation. The positioning plate can position the stretching head, so that the stretching head is always in a horizontal state under the action of the two guide rods.

[0024] 2. In this utility model, pressure is injected through the hydraulic connecting pipe to move the hydraulic piston, thereby causing the tension head to elongate the bolt. After reaching the predetermined tension amount, the pressure is stopped and maintained for a period of time to allow a good preload to form between the bolt and the connected parts. When slowly releasing the pressure, the tension head needs to be rotated. When the tension head rotates, it will rotate the positioning plate and two guide rods. The arc-shaped connecting plate can drive the two guide rods to rotate simultaneously, so there will be no skewing, which plays a guiding and positioning role. Under the action of elastic restoring force, the bolt is in close contact with the nut or washer to complete the fastening process. Attached Figure Description

[0025] Figure 1 This utility model provides a structural schematic diagram of a guide device for a bolt tensioner;

[0026] Figure 2 An exploded structural diagram of a guide device for a bolt tensioner is provided for this utility model.

[0027] Figure 3 This utility model provides a cross-sectional structural schematic diagram of a guide device for a bolt tensioner;

[0028] Figure 4 This utility model proposes a guiding device for a bolt tensioner. Figure 2 Enlarged structural diagram at point A in the middle.

[0029] Legend:

[0030] 1. Hydraulic cylinder; 101. Support seat; 102. Tensioning head; 103. Circular ring plate; 104. T-shaped ring groove; 105. Fixing plate; 106. Arc-shaped connecting plate; 107. Guide rod; 108. Limiter; 109. Positioning plate; 110. Double-acting screw; 111. Handle; 112. Adjusting ring; 113. Through hole; 114. T-shaped ring plate; 115. Hydraulic connecting pipe; 116. Hydraulic piston; 117. Rectangular plate; 118. Through groove; 119. Limiting plate. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0033] Example 1, as Figure 1-4 As shown, this utility model provides a guiding device for a bolt tensioner, including: a hydraulic cylinder 1, a support base 101, and a tensioning head 102. The tensioning head 102 is movably embedded inside the hydraulic cylinder 1. A hydraulic piston 116 is provided inside the hydraulic cylinder 1. A hydraulic connecting pipe 115 is provided on the outer surface of the hydraulic cylinder 1 near its lower end. Two hydraulic connecting pipes 115 are symmetrically positioned. A circular ring plate 103 is fixedly installed at the lower end of the outer surface of the hydraulic cylinder 1. A T-shaped annular groove 104 is formed on the outer surface of the circular ring plate 103. It includes: two T-shaped ring plates 114, both movably embedded inside the T-shaped ring groove 104, the two T-shaped ring plates 114 being symmetrical; two fixing plates 105, both fixedly installed on the top of the two T-shaped ring plates 114, and guide rods 107 are fixedly installed on the top of the two fixing plates 105; positioning plates 109 are movably sleeved on the outer surface of the two guide rods 107, and through holes 113 are opened on both sides of the positioning plates 109; the two through holes 113 are symmetrical, and the two guide rods 107 pass through the through holes 113.

[0034] In this embodiment, the support seat 101 is first fitted onto the nut, then the hydraulic cylinder 1 is fitted onto the support seat 101 and the bolt, and then the stretching head 102 is installed on the bolt. The positioning plate 109 is fitted onto the two guide rods 107 through the two through holes 113, and the limiter 108 is threaded onto the top of the guide rod 107. In this way, the positioning plate 109 will not detach from the guide rod 107, thus improving stability. The two limit plates 119 are embedded inside the stretching head 102. By rotating the bidirectional screw 110 through the adjusting ring 112, the bidirectional screw 110 can drive the two limit plates 119 to move relative to or away from each other. The adjustment is made according to the size of the stretching head 102 so that the two limit plates 119 are locked inside the stretching head 102. In this way, the stretching head 102 will not be skewed or stuck during the stretching operation. The positioning plate 109 can position the stretching head 102, so that the stretching head 102 is always in a horizontal state under the action of the two guide rods 107.

[0035] Example 2, as Figure 1-4As shown, an arc-shaped connecting plate 106 is fixedly installed on one side of the two fixed plates 105, and a limiter 108 is threadedly installed on the top of the two guide rods 107; a through groove 118 is opened on the outer surface of the positioning plate 109, and rectangular plates 117 are fixedly installed on the outer surfaces of the positioning plate 109 near the through groove 118; a bidirectional screw 110 is movably embedded on the opposite surface of the two rectangular plates 117, and an adjusting ring 112 is fixedly sleeved at the center of the bidirectional screw 110; two limiting plates 119 are movably sleeved on the outer surface of the bidirectional screw 110, and the two limiting plates 119 are symmetrical; both limiting plates 119 are movably embedded inside the through groove 118, and a handle 111 is fixedly installed on one side of the positioning plate 109.

[0036] In this embodiment, pressure is injected through the hydraulic connecting pipe 115 to move the hydraulic piston 116, thereby causing the tension head 102 to elongate the bolt. After reaching the predetermined tension amount, the pressure is stopped and maintained for a period of time to allow a good preload to be formed between the bolt and the connected parts. When slowly releasing the pressure, the tension head 102 needs to be rotated. When the tension head 102 rotates, it will cause the positioning plate 109 and the two guide rods 107 to rotate. The arc-shaped connecting plate 106 can drive the two guide rods 107 to rotate simultaneously, so there will be no skewness, which plays a guiding and positioning role. Under the action of elastic restoring force, the bolt is in close contact with the nut or washer to complete the fastening process.

[0037] Working principle: In use, first, put the support seat 101 on the nut, then put the hydraulic cylinder 1 on the support seat 101 and the bolt, then install the tension head 102 on the bolt, and put the positioning plate 109 on the two guide rods 107 through the two through holes 113. The limiter 108 is threaded onto the top of the guide rod 107, so that the positioning plate 109 will not detach from the guide rod 107, thus improving stability. The two limit plates 119 are embedded inside the tension head 102. By rotating the bidirectional screw 110 through the adjusting ring 112, the bidirectional screw 110 can drive the two limit plates 119 to move relative to or away from each other. Adjustments are made according to the size of the tension head 102 so that the two limit plates 119 are locked inside the tension head 102. This prevents the tension head 102 from tilting or jamming during the tensioning operation. The positioning plate 109 can... The tension head 102 is positioned to ensure it remains horizontal. Under the action of the two guide rods 107, pressure is injected through the hydraulic connecting pipe 115 to move the hydraulic piston 116, causing the tension head 102 to elongate the bolt. Once the predetermined tension is reached, the pressure is stopped and maintained for a period of time to allow a good preload to form between the bolt and the connected parts. When slowly releasing the pressure, the tension head 102 needs to be rotated. As the tension head 102 rotates, it also rotates the positioning plate 109 and the two guide rods 107. The arc-shaped connecting plate 106 can drive the two T-shaped ring plates 114 to rotate simultaneously inside the T-shaped ring groove 104. Therefore, the T-shaped ring plates 114 and the guide rods 107 rotate, preventing any skewing and providing a guiding and positioning function. Under the action of elastic restoring force, the bolt makes tight contact with the nut or washer, completing the tightening process.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A guide for a bolt tensioner, comprising: Hydraulic cylinder (1), support seat (101) and stretch head (102), the stretch head (102) is movably embedded in the inside of hydraulic cylinder (1), the inside of hydraulic cylinder (1) is provided with hydraulic piston (116), the outer surface of the lower end of hydraulic cylinder (1) is provided with hydraulic connection pipe (115), two hydraulic connection pipes (115) are symmetrical, the lower end of the outer surface of hydraulic cylinder (1) is fixedly installed with circular ring plate (103), the outer surface of circular ring plate (103) is provided with T-shaped ring groove (104), characterized by further comprising: Two T-shaped ring plates (114) are movably embedded in the inside of T-shaped ring groove (104), two T-shaped ring plates (114) are symmetrical; Two fixed plates (105) are fixedly installed on the top of two T-shaped ring plates (114), and the top of two fixed plates (105) is fixedly installed with guide rod (107).

2. A guide for a bolt tensioner as defined in claim 1, wherein: The outer surface of two guide rods (107) movably sleeves positioning plate (109), both sides of positioning plate (109) are provided with through hole (113).

3. A guide for a bolt tensioner as defined in claim 2, wherein: Two through holes (113) are symmetrical, and two guide rods (107) pass through through hole (113).

4. A guide for a bolt tensioner as defined in claim 3, wherein: One side of two fixed plates (105) is fixedly installed with arc-shaped connecting plate (106), and the top of two guide rods (107) is threadedly installed with limit stop (108).

5. A guide for a bolt tensioner as defined in claim 4, wherein: The outer surface of positioning plate (109) is provided with through slot (118), and the outer surface of positioning plate (109) is fixedly installed with rectangular plate (117) near through slot (118).

6. A guide for a bolt tensioner as defined in claim 5, wherein: The opposite surfaces of two rectangular plates (117) movably embed bidirectional screw rod (110), and the center of bidirectional screw rod (110) fixedly sleeves adjusting ring (112).

7. A guide for a bolt tensioner as defined in claim 6, wherein: The outer surface of bidirectional screw rod (110) movably sleeves two limit plates (119), and two limit plates (119) are symmetrical.

8. A guide for a bolt tensioner as defined in claim 7, wherein: Two limit plates (119) are movably embedded in the inside of through slot (118), and one side of positioning plate (109) is fixedly installed with handle (111).

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