Bolt stretching equipment

Abstract

The utility model discloses bolt stretching equipment which comprises a supporting seat, a top plate is arranged on the inner side surface of the supporting seat, a sealing ring is arranged on the outer side surface of the top plate, a drawing device is arranged on the inner side surface of the supporting seat, and a rotating plate is rotationally connected to the inner side surface, located below the drawing device, of the supporting seat. A nut rotating mechanism is rotationally connected to the inner side surface of the rotating plate, a connecting pipe is fixedly connected to the outer side surface of the supporting seat, an oil injection pipe is arranged on the outer side surface of the connecting pipe, and a fixing mechanism is fixedly connected to the outer side surface, located on one side of the oil injection pipe, of the connecting pipe. By arranging the nut rotating mechanism, nuts of different sizes and specifications can be rotated within a certain range, disassembly and replacement operation is not needed, time and labor are saved, the bolt stretching efficiency is improved, and by arranging the fixing mechanism, connection, fixation and separation of an oil injection pipe and a connecting pipe can be rapidly completed; and the use convenience of the stretching equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stretching equipment, in particular to a bolt stretching equipment. Background Art

[0002] Hydraulic bolt tensioner is short for hydraulic tensioner. It has the function of bolt tightening and disassembling. It can be widely used in metallurgy, mining, petrochemical, shipbuilding, power system, locomotive and vehicle, heavy machinery and other industries.

[0003] When using some existing hydraulic tensioners, the support seat is firstly put on the stud, and then the puller is screwed into the bolt, the oil cylinder is connected with the oil pipe, and the oil is transported to the oil cylinder through the oil pipe for pressurization, so that the puller moves up to stretch the bolt and nut, and then the nut rotator is rotated to rotate the nut down to tighten the bolt, thereby completing the bolt stretching;

[0004] However, the size of the nut rotater is fixed. When rotating nuts of different sizes, the nut rotater needs to be disassembled and replaced, which is time-consuming and labor-intensive, affecting the tensioning efficiency of the bolt. In addition, the connection between the oil cylinder and the oil pipeline is generally fixed by a nut. The nut needs to be rotated multiple times during loading and unloading, making it difficult to quickly complete the connection between the oil cylinder and the oil pipeline. Summary of the invention

[0005] The purpose of the utility model is to provide a bolt tensioning device, which can solve the problem that the size of the nut rotater is fixed. When rotating nuts of different sizes, the nut rotater needs to be disassembled and replaced, which is time-consuming and labor-intensive, affecting the bolt tensioning efficiency. In addition, the connection between the oil cylinder and the oil pipeline is generally fixed by a nut. The nut needs to be rotated multiple times during loading and unloading, making it difficult to quickly complete the connection between the oil cylinder and the oil pipeline.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bolt stretching device, comprising a support seat, the inner surface of the support seat is provided with a top plate, the outer surface of the top plate is provided with a sealing ring, the inner surface of the support seat is provided with a puller, the inner surface of the support seat located below the puller is rotatably connected with a rotating plate, the inner surface of the rotating plate is rotatably connected with a nut rotating mechanism, the outer surface of the support seat is fixedly connected with a connecting pipe, the outer surface of the connecting pipe is provided with an oil filling pipe, the outer surface of the connecting pipe located on one side of the oil filling pipe is fixedly connected with a fixing mechanism, and the fixing mechanism is slidably plugged with the oil filling pipe.

[0007] Preferably, two handles are symmetrically fixedly connected to the outer surface of the support base.

[0008] Preferably, a plurality of blind holes are symmetrically provided on the outer surface of the rotating plate.

[0009] Preferably, the nut rotation mechanism includes a main gear rotatably connected to the inner surface of a rotating plate, the outer surface of the main gear is symmetrically meshingly connected with a plurality of slave gears, the end faces of the slave gears are fixedly connected with threaded rods, the plurality of threaded rods are rotatably connected to the rotating plate, the outer surface of the threaded rod is threadedly connected with a sleeve, the plurality of sleeves are slidably connected to the rotating plate, the end of the sleeve away from the threaded rod is fixedly connected to the rotating plate, the outer surface of the rotating plate is fixedly connected with a limiting rod 1, and the plurality of limiting rods 1 are slidably connected to the rotating plate.

[0010] Preferably, a rubber pad is fixedly connected to the outer surface of the main gear below the slave gear.

[0011] Preferably, the outer surface of the sleeve is provided with scale lines.

[0012] Preferably, the fixing mechanism includes a connecting plate fixedly connected to the outer surface of the connecting tube, the connecting plate is in contact with the oil filling tube, the inner surface of the connecting plate is symmetrically fixedly connected with two fixing rods, the outer surfaces of the two fixing rods are slidably connected with a fixing plate, the outer surface of the fixing plate is symmetrically fixedly connected with two springs, the fixing plate is in contact with the oil filling tube, the two springs are both fixedly connected to the connecting plate, the spring is sleeved on the outer surface of the fixing rod, the outer surface of the connecting plate located below the fixing plate is symmetrically fixedly connected with two limit rods 2, and the two limit rods 2 are both slidably plugged into the oil filling tube.

[0013] Preferably, an oblique groove is provided on the outer surface of the fixing plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The present application realizes the function of adjusting the position of the rotating plate by setting a nut rotating mechanism and rotating the main gear to move the rotating plate to a suitable position, so that when the device is used, it can rotate nuts of different sizes within a certain range without disassembly and replacement operations, which saves time and effort and improves the tensioning efficiency of the bolts;

[0016] 2. The present application realizes the function of quick disassembly and assembly of the oil filling pipe and the connecting pipe by setting up a fixing mechanism, through the cooperation of the connecting plate, the fixing rod, the fixing plate, the spring and the limit rod, so that when the stretching equipment is in use, the connection, fixation and separation of the oil filling pipe and the connecting pipe can be quickly completed, thereby improving the convenience of using the stretching equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is the overall structural view of the utility model;

[0019] Figure 2 This is a cross-sectional structural view of the support seat of the utility model;

[0020] Figure 3 For this utility model Figure 2 A cross-sectional structural view of a rotating plate;

[0021] Figure 4 This is a structural view of the fixing mechanism of the utility model;

[0022] Figure 5 For this utility model Figure 4 The fixed plate structure view in .

[0023] Description of reference numerals:

[0024] 1. Support seat; 2. Top plate; 3. Sealing ring; 4. Puller; 5. Rotating plate; 6. Nut rotating mechanism; 61. Main gear; 62. Slave gear; 63. Threaded rod; 64. Sleeve; 65. Rotating plate; 66. Limit rod 1; 7. Connecting pipe; 8. Oil filling pipe; 9. Fixing mechanism; 91. Connecting plate; 92. Fixing rod; 93. Fixing plate; 94. Spring; 95. Limit rod 2; 10. Handle; 11. Blind hole; 12. Rubber pad; 13. Bevel groove. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figures 1 to 5 , the utility model provides a technical solution:

[0027] A bolt tensioning device includes a support seat 1, a top plate 2 is provided on the inner surface of the support seat 1, a sealing ring 3 is provided on the outer surface of the top plate 2, a puller 4 is provided on the inner surface of the support seat 1, a rotating plate 5 is rotatably connected to the inner surface of the support seat 1 below the puller 4, a nut rotating mechanism 6 is rotatably connected to the inner surface of the rotating plate 5, a connecting pipe 7 is fixedly connected to the outer surface of the support seat 1, an oil filling pipe 8 is provided on the outer surface of the connecting pipe 7, a fixing mechanism 9 is fixedly connected to the outer surface of the connecting pipe 7 located on one side of the oil filling pipe 8, and the fixing mechanism 9 is slidably plugged into the oil filling pipe 8.

[0028] Specifically, Figure 1 As shown, two handles 10 are symmetrically fixedly connected to the outer surface of the support base 1, and the handles 10 facilitate the movement of the stretching device.

[0029] Specifically, Figure 1 As shown, a plurality of blind holes 11 are symmetrically provided on the outer surface of the rotating plate 5 , and the insertion rods are connected to the rotating plate 5 through the blind holes 11 to complete the rotation of the rotating plate 5 .

[0030] Specifically, Figure 1 , Figure 2 and Figure 3 As shown, the nut rotating mechanism 6 includes a main gear 61 rotatably connected to the inner surface of the rotating plate 5, and the outer surface of the main gear 61 is symmetrically meshed with a plurality of slave gears 62, and the end surface of the slave gear 62 is fixedly connected with a threaded rod 63, and the plurality of threaded rods 63 are all rotatably connected to the rotating plate 5, and the outer surface of the threaded rod 63 is threadedly connected with a sleeve 64, and the plurality of sleeves 64 are all slidably connected to the rotating plate 5, and one end of the sleeve 64 away from the threaded rod 63 is fixedly connected to a rotating plate 65, and the outer surface of the rotating plate 65 is fixedly connected with a limit rod 66, and the plurality of limit rods 66 are all slidably connected to the rotating plate 5.

[0031] When in use, according to the actual size of the nut, the main gear 61 is rotated, and the rotation of the main gear 61 drives the rotation of the slave gear 62, and then the rotation of the slave gear 62 drives the threaded rod 63 to rotate, and then the sleeve 64 is driven to move, and then the sleeve 64 moves to drive the rotating plate 65 to move to a suitable position, and then the rotating plate 65 moved to a suitable position is used to rotate the nut. In this process, the rotating plate 65 is limited by the limiting rod 1 66, so that the movement of the rotating plate 65 is stable;

[0032] The function of adjusting the position of the rotating plate 65 is realized, so that when the equipment is used, it can be rotated for nuts of different sizes within a certain range without the need for disassembly and replacement operations, which saves time and effort and improves the tensioning efficiency of the bolts.

[0033] Specifically, Figure 2 and Figure 3As shown, a rubber pad 12 is fixedly connected to the outer surface of the main gear 61 below the slave gear 62 to increase the friction between the main gear 61 and the rotating plate 5 so that the main gear 61 remains stable when the rotating plate 5 rotates.

[0034] Specifically, Figure 3 As shown, the outer surface of the sleeve 64 is provided with scale lines to understand the moving distance of the rotating plate 65.

[0035] Specifically, Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the fixing mechanism 9 includes a connecting plate 91 fixedly connected to the outer surface of the connecting tube 7, the connecting plate 91 is in contact with the oil filling pipe 8, the inner surface of the connecting plate 91 is symmetrically fixedly connected with two fixing rods 92, the outer surfaces of the two fixing rods 92 are slidably connected with a fixing plate 93, the outer surface of the fixing plate 93 is symmetrically fixedly connected with two springs 94, the fixing plate 93 is in contact with the oil filling pipe 8, the two springs 94 are both fixedly connected to the connecting plate 91, the springs 94 are sleeved on the outer surface of the fixing rod 92, the outer surface of the connecting plate 91 located below the fixing plate 93 is symmetrically fixedly connected with two limiting rods 95, and the two limiting rods 95 are both slidably plugged with the oil filling pipe 8.

[0036] During installation, the oil filling pipe 8 is plugged into the second limiting rod 95. When the oil filling pipe 8 contacts the fixing plate 93, the fixing plate 93 is forced to move upward, and the spring 94 is compressed. After the oil filling pipe 8 contacts the connecting plate 91 and the oil filling pipe 8 contacts the connecting pipe 7, the fixing plate 93 is moved down to restore to its original position by the restoring elastic force of the spring 94, and the oil filling pipe 8 is axially limited. At the same time, the oil filling pipe 8 is plugged into the second limiting rod 95 to limit the oil filling pipe 8 radially, so that the contact between the oil filling pipe 8 and the connecting pipe 7 is stable, thereby completing the connection and fixation of the oil filling pipe 8 and the connecting pipe 7. When the oil filling pipe 8 is disassembled, the fixing plate 93 is pulled up to separate the fixing plate 93 from the oil filling pipe 8, and the separation of the oil filling pipe 8 and the connecting pipe 7 is completed.

[0037] The function of quick disassembly and assembly of the oil filling pipe 8 and the connecting pipe 7 is realized, so that when the stretching device is in use, the connection, fixation and separation of the oil filling pipe 8 and the connecting pipe 7 can be quickly completed, thereby improving the convenience of using the stretching device.

[0038] Specifically, Figure 5 As shown, an oblique groove 13 is provided on the outer surface of the fixing plate 93 . When the oil filling pipe 8 contacts the fixing plate 93 , the fixing plate 93 is forced to move upward, which facilitates the connection between the oil filling pipe 8 and the connecting pipe 7 .

[0039] Working principle: During installation, the oil filling pipe 8 is plugged into the second limiting rod 95. When the oil filling pipe 8 contacts the fixing plate 93, the fixing plate 93 is forced to move upward. After the oil filling pipe 8 contacts the connecting plate 91 and the oil filling pipe 8 contacts the connecting pipe 7, the fixing plate 93 is moved downward to restore to its original position through the spring 94, and the oil filling pipe 8 is axially limited. At the same time, the oil filling pipe 8 is plugged into the second limiting rod 95 to limit the oil filling pipe 8 radially, thereby completing the connection and fixation of the oil filling pipe 8 and the connecting pipe 7.

[0040] According to the actual size of the nut, the main gear 61 is rotated to move the rotating plate 65 to a suitable position, and then the support seat 1 is put on the stud, and the puller 4 is screwed into the bolt. The oil is transported to the space between the support seat 1 and the top plate 2 through the oil filling pipe 8, so that the top plate 2 is forced to move upward, and the puller 4 is driven to move upward to stretch the bolt and nut. After stretching, the external plug rod is inserted into the blind hole 11, and the plug rod is rotated to rotate the rotating plate 5, and then the rotating plate 65 is rotated, driving the nut to rotate and descend to tighten the bolt.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A bolt tensioning device, comprising a support seat (1), characterized in that: The inner surface of the support seat (1) is provided with a top plate (2), the outer surface of the top plate (2) is provided with a sealing ring (3), the inner surface of the support seat (1) is provided with a puller (4), the inner surface of the support seat (1) located below the puller (4) is rotatably connected to a rotating plate (5), the inner surface of the rotating plate (5) is rotatably connected to a nut rotating mechanism (6), the outer surface of the support seat (1) is fixedly connected to a connecting pipe (7), the outer surface of the connecting pipe (7) is provided with an oil injection pipe (8), the outer surface of the connecting pipe (7) located on one side of the oil injection pipe (8) is fixedly connected to a fixing mechanism (9), and the fixing mechanism (9) is slidably plugged with the oil injection pipe (8).

2. A bolt tensioning device according to claim 1, characterized in that: Two handles (10) are symmetrically and fixedly connected to the outer surface of the support base (1).

3. A bolt tensioning device according to claim 2, characterized in that: A plurality of blind holes (11) are symmetrically provided on the outer surface of the rotating plate (5).

4. A bolt tensioning device according to claim 3, characterized in that: The nut rotating mechanism (6) comprises a main gear (61) rotatably connected to the inner surface of the rotating plate (5); the outer surface of the main gear (61) is symmetrically meshed with a plurality of slave gears (62); the end surface of the slave gear (62) is fixedly connected with a threaded rod (63); the plurality of threaded rods (63) are rotatably connected to the rotating plate (5); the outer surface of the threaded rod (63) is threadedly connected with a sleeve (64); the plurality of sleeves (64) are slidably connected to the rotating plate (5); the end of the sleeve (64) away from the threaded rod (63) is fixedly connected to the rotating plate (65); the outer surface of the rotating plate (65) is fixedly connected with a limiting rod (66); the plurality of limiting rods (66) are slidably connected to the rotating plate (5).

5. A bolt tensioning device according to claim 4, characterized in that: A rubber pad (12) is fixedly connected to the outer surface of the main gear (61) located below the slave gear (62).

6. A bolt tensioning device according to claim 5, characterized in that: The outer surface of the sleeve (64) is provided with scale lines.

7. A bolt tensioning device according to claim 6, characterized in that: The fixing mechanism (9) comprises a connecting plate (91) fixedly connected to the outer surface of the connecting tube (7), the connecting plate (91) being in contact with the oil injection tube (8), two fixing rods (92) being symmetrically fixedly connected to the inner surface of the connecting plate (91), the outer surfaces of the two fixing rods (92) being slidably connected to a fixing plate (93), the outer surface of the fixing plate (93) being symmetrically fixedly connected to two springs (94), the fixing plate (93) being in contact with the oil injection tube (8), the two springs (94) being fixedly connected to the connecting plate (91), the springs (94) being sleeved on the outer surface of the fixing rod (92), the outer surface of the connecting plate (91) located below the fixing plate (93) being symmetrically fixedly connected to two limiting rods (95), the two limiting rods (95) being slidably plugged into the oil injection tube (8).

8. A bolt tensioning device according to claim 7, characterized in that: An oblique groove (13) is formed on the outer surface of the fixing plate (93).

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