A quick make-up device for connecting flange bolts

Abstract

The application discloses a connecting flange bolt quick make-up device, and relates to the technical field of flange installation equipment. The connecting flange bolt quick make-up device comprises a shell, the shell is provided with an inner hole matched with a high-pressure manifold, a driving mechanism is arranged on one side end face of the shell, a plurality of driving friction shafts are arranged in the inner cavity of the shell around the axis of the inner hole, the output end of the driving mechanism extends into the inner cavity of the shell and is connected with one driving friction shaft, driven friction shafts are arranged between the driving friction shafts, the driven friction shafts are parallel to the driving friction shafts, the upper end faces of the driving friction shafts abut against the lower end faces of the driven friction shafts, the driven friction shafts are provided with connecting rods, one end of each connecting rod, which is away from the driving mechanism, penetrates through the shell and is detachably connected with a clamping jaw matched with a connecting bolt. The connecting flange bolt quick make-up device solves the technical problem that the current manual flange connecting bolt screwing method has low efficiency and uneven screwing force of each connecting bolt, thereby affecting the flange connection reliability.

Description

Technical Field

[0001] This invention relates to the field of flange installation equipment technology, and in particular to a quick-release device for connecting flange bolts. Background Technology

[0002] Newly discovered deep, ultra-deep, shale, and tight sandstone low-permeability, unconventional oil and gas resources account for approximately 70% of my country's reserves. Efficiently developing these resources is a crucial strategic measure for national energy security and a significant direction and global challenge in oil and gas development. The number of ultra-high-pressure wells used in large-scale fracturing operations in my country is increasing annually. Wells located in mountainous areas with limited space, and the demand for large-scale projects involving thousands of cubic meters of sand and tens of thousands of cubic meters of fluid have become the new normal. During the assembly of ultra-high-pressure fracturing equipment, high-pressure manifolds are primarily connected using flanges, which are then secured with bolts. Currently, the bolts are mainly tightened manually by twisting. This results in uneven distribution of the preload on the flange bolts and easily leads to insufficient preload. Furthermore, manual twisting is inefficient and has low connection reliability.

[0003] In summary, developing a quick-locking device for connecting flange bolts that is easy to install, ensures uniform tightening of all connecting bolts, and is reliable is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a quick-release device for tightening flange bolts, which solves the technical problems of low efficiency and uneven tightening force of each bolt in existing manual flange bolt tightening methods, thus affecting the reliability of flange connections.

[0005] To achieve the above objectives, the present invention provides a quick-release bolt fastening device for connecting flanges, comprising:

[0006] The housing has an inner hole that mates with a high-pressure manifold. A drive mechanism is provided on one end face of the housing. Several active friction shafts are provided in the inner cavity of the housing around the axis of the inner hole. The output end of the drive mechanism extends into the inner cavity of the housing and is connected to one of the active friction shafts. A driven friction shaft is provided between each active friction shaft. The driven friction shaft is parallel to the active friction shaft, and the upper end face of each active friction shaft abuts against the lower end face of each driven friction shaft. A connecting rod extends along the rotation axis of the driven friction shaft. The end of the connecting rod away from the drive mechanism passes through the housing and is detachably connected to a pawl. The pawl mates with a connecting bolt.

[0007] Preferably, the drive mechanism includes a motor, which is fixed on the mounting base. The output end of the motor is connected to the drive shaft via a coupling, and the drive shaft is connected to the active friction shaft.

[0008] Preferably, a plurality of limiting holes are evenly distributed on the two side walls of the inner cavity of the housing perpendicular to the drive shaft, and a drive shaft bearing is fixed in the limiting hole, and each drive shaft bearing is connected to each drive friction shaft.

[0009] Preferably, each connecting rod has a first fixing plate abutting one end near the drive mechanism, and a second fixing plate passing through the side near the pawl. The first fixing plate and the second fixing plate are fixed to the two end faces of the housing by fasteners, and a driven shaft bearing is provided between the first fixing plate, the second fixing plate and the connecting rod.

[0010] Preferably, the housing includes an upper end cover and a lower end cover that are symmetrical to each other. The plane of symmetry of the upper end cover and the lower end cover is perpendicular to the axis of the inner hole. Each of the upper end cover and the lower end cover includes two symmetrical half-shells. The plane of symmetry of each half-shell is coplanar with the axis of the inner hole.

[0011] Preferably, it also includes a connecting buckle, specifically a U-shaped connecting buckle, with two rods parallel to the axis of the inner hole respectively passing through the side wall of each half shell. The connecting buckle is used to splice the mutually symmetrical half shells and connect the upper end cover and the lower end cover.

[0012] Preferably, several sliding grooves are arranged radially along the diameter on the two end faces of the housing perpendicular to the axis of the inner hole, and the connecting rod can slide in the sliding grooves.

[0013] Preferably, the inner wall of the bore extends along the axis of the bore, and the elastic teeth are used to clamp the high-pressure manifold.

[0014] Preferably, the claw is sleeved inside the connecting rod, and the claw and the connecting rod are coaxially arranged. The double-ended bolt is perpendicularly inserted through the connecting rod and the claw, and the double-ended bolt fixes the claw and the connecting rod. A locking nut is screwed on both sides of the double-ended bolt, and each locking nut is used to lock the position of the double-ended bolt.

[0015] Compared to the aforementioned background technology, the quick-locking device for connecting flange bolts provided by the present invention includes: a housing, with an inner hole extending along the axis of the housing, the inner hole being used to house a high-pressure manifold connected to the connecting flange, so that the quick-locking device for connecting flange bolts is coaxially arranged with the mounting flange; a driving mechanism is provided on the end face of the housing, the output end of the driving mechanism extending into the inner cavity of the housing; a plurality of active friction shafts are provided in the inner cavity of the housing along the axis of the inner hole, each active friction shaft being evenly distributed around the axis of the inner hole; the output end of the driving mechanism is coaxially connected to one of the active friction shafts; a driven friction shaft is provided between each adjacent active friction shaft; furthermore, the lower end face of the driven friction shaft abuts against the upper end face of the active friction shaft; a connecting rod extends from the driven friction shaft along its own axis, wherein a detachable claw is connected to the end of the connecting rod away from the driving mechanism, the claw being able to engage with the head of the connecting bolt; by connecting the quick-locking device for connecting flange bolts with the connecting flange... The flange is then assembled, aligning the jaws with the connecting bolts of the flange. The drive mechanism is activated, and its output drives an active friction shaft to rotate. The upper surface of the active friction shaft applies friction to the lower surfaces of the driven friction shafts on both sides, causing them to rotate. The connecting rods connected to these driven friction shafts rotate, and the jaws tighten the bolts engaged with them. As the driven friction shafts rotate, they apply friction to the active friction shaft on the side opposite to the drive mechanism. The active friction shaft then drives the driven friction shaft on the other side, and so on. Each driven friction shaft drives the jaws to tighten the connecting bolts. Because the coefficient of friction between each driven friction shaft and the active friction shaft is the same, the maximum friction force between them is also the same, and the maximum torque applied by each driven friction shaft to each connecting bolt is the same. This improves the installation efficiency of the connecting bolts while ensuring uniform distribution of preload, thus enhancing the reliability of the flange. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a structural diagram of the quick-release bolt fastening device for connecting flanges provided in an embodiment of the present invention;

[0018] Figure 2 This is a partial cross-sectional view of the quick-release bolt fastening device for connecting flanges provided in an embodiment of the present invention;

[0019] Figure 3 This is a bottom view of the quick-release bolt fastening device for connecting flanges provided in an embodiment of the present invention;

[0020] Figure 4 This is a structural diagram of the drive mechanism and active friction shaft assembly provided in an embodiment of the present invention;

[0021] Figure 5 This is a cross-sectional view of the driven friction shaft provided in an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the connecting buckle provided in an embodiment of the present invention.

[0023] Wherein, 1-housing; 101-upper end cover; 102-lower end cover; 103-half-housing; 201-motor; 202-coupling; 203-drive shaft; 204-mounting base; 3-active friction shaft; 4-driven friction shaft; 41-connecting rod; 5-claw; 6-double-ended bolt; 7-connecting buckle; 801-first fixing plate; 802-second fixing plate; 901-active shaft bearing; 902-driven shaft bearing; 10-claw tooth; 11-sliding groove; 12-limiting hole. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] This invention provides a quick-release device for connecting flange bolts; please refer to the appendix of the instruction manual. Figure 1 To be continued Figure 6 The quick-release flange bolt fastening device includes a housing 1. The housing 1 has an inner hole along its own axis for installing a high-pressure manifold. The quick-release flange bolt fastening device is fitted onto the high-pressure manifold so that the end face of the housing 1 corresponds to the connecting flange. A drive mechanism is provided on the end face of the housing 1 away from the connecting flange. The output end of the drive mechanism extends into the inner cavity of the housing 1. Several active friction shafts 3 are provided in the inner cavity of the housing 1. The rotation axis of each active friction shaft 3 is parallel to the axis of the inner hole. The active friction shafts 3 are evenly arranged around the axis of the inner hole. A driven friction shaft 4 is provided between adjacent active friction shafts 3. It should be noted that the lower end face of the driven friction shaft 4 abuts against the upper end face of the active friction shaft 3. The active friction shaft 3 can drive the driven friction shaft 4 to rotate. A connecting rod 41 extends from the driven friction shaft 4 along its own axis. The end of the connecting rod 41 away from the drive mechanism passes through the end face of the housing 1 corresponding to the connecting flange. A claw 5 is connected to the extended end of the connecting rod 41.

[0027] When using the present invention to install the connecting flange, the high-pressure manifold is inserted through the inner hole, so that the end face of the housing 1 facing away from the drive mechanism corresponds to the connecting flange. Each claw 5 is engaged with each connecting bolt. The drive mechanism is started, and its output end rotates coaxially with one of the active friction shafts 3. The active friction shaft 3 abuts against and generates pressure on the driven friction shafts 4 on both sides. The upper end face of the active friction shaft 3 applies frictional force to the lower end face of the driven friction shaft 4, causing the driven friction shaft 4 to rotate. The connecting rod 41, coaxially connected to the driven friction shaft 4, rotates. The connecting rod 41 tightens the connecting bolts through the claws 5. During the rotation of the two driven friction shafts 4... Two driven friction shafts 4 apply frictional force to the active friction shaft 3 on the side opposite to the output end of the drive mechanism. The rotation of the active friction shaft 3 drives the driven friction shaft 4 on the other side to rotate. This process repeats, and the drive mechanism drives all the active friction shafts 3 and driven friction shafts 4 to rotate. The active friction shafts 3 and driven friction shafts 4 are transmitted through frictional force. Under the condition that the coefficient of friction and pressure between each driven friction shaft 4 and each active friction shaft 3 are the same, the torque applied to the pawl 5 by the rotation of each connecting rod 41 is the same. This ensures that after the installation of each connecting bolt is completed, the preload force is evenly distributed at all points on the mounting flange, thereby improving the connection reliability of the mounting flange.

[0028] The contact surfaces of the active friction shaft 3 and the driven friction shaft 4 can be provided with rough textures to ensure the synchronous movement of the active friction shaft 3 and the driven friction shaft 4. The friction between the active friction shaft 3 and the driven friction shaft 4 is achieved by their axial resistance. That is, the closer the active friction shaft 3 and the driven friction shaft 4 are in axial contact, the less likely they are to slip.

[0029] Considering that the output end of the drive mechanism is coaxially connected to and rotates with the active friction shaft 3, the rigid connection between the output end and the active friction shaft 3 is not prone to failure. Therefore, the drive mechanism can be set on the telescopic part of the adjustment device. The adjustment device is located in the housing 1. The telescopic part can move along the axial direction of the active friction shaft 3 and the driven friction shaft 4. When the telescopic part drives the drive mechanism to move axially toward the driven friction shaft 4, the output end of the drive mechanism and the active friction shaft 3 will move axially toward the driven friction shaft 4 simultaneously, so that the active friction shaft 3 and the driven friction shaft 4 are tightly abutted in the axial direction.

[0030] To monitor in real time whether the movements of the active friction shaft 3 and the driven friction shaft 4 are synchronized, an angle sensor can be installed on the driven friction shaft 4. The angle sensor is used to detect the rotation angle of the driven friction shaft 4. The angle sensor is connected to a controller, which is also connected to an adjustment device. The controller receives the rotation angle of the driven friction shaft 4 detected by the angle sensor when the output end of the drive mechanism moves. When the controller determines that the difference between the rotation angle of the driven friction shaft 4 and the rotation angle of the output end of the drive mechanism exceeds a preset difference, it indicates that the driven friction shaft 4 and the active friction shaft 3 are slipping. At this time, the controller will control the telescopic component of the adjustment device to move towards the driven friction shaft 4. That is, the telescopic component drives the drive mechanism to move axially towards the driven friction shaft 4, so that the active friction shaft 3 and the driven friction shaft 4 are tightly abutted in the axial direction. The adjustment device can be a cylinder, etc., and the telescopic component can be the telescopic rod of the cylinder.

[0031] The drive mechanism includes a mounting base 204 that supports the motor 201. Preferably, the mounting base 204 is U-shaped, that is, the mounting base 204 includes a connecting part that fits against the end face of the housing 1. A connector is provided between the connecting part and the housing 1. Each connecting part extends a support part to the side away from the end face of the housing 1. The support part is perpendicular to the end face of the housing 1. The mounting base 204 is connected between each support part. The motor 201 is fixed on the end face of the mounting base 204 opposite to the housing 1 by the connector. The output end of the motor 201 is connected to the drive shaft 203 through a coupling 202. The drive shaft 203 extends into the inner cavity of the housing 1 and is connected to the active friction shaft 3 in the inner cavity of the housing 1. The motor 201 provides power to the active friction shaft 3.

[0032] Please refer to the instruction manual appendix. Figure 4 With appendix Figure 5A plurality of limiting holes 12 are evenly distributed on the two inner sidewalls of the housing 1 perpendicular to its axis. Each limiting hole 12 contains a drive shaft bearing 901, which is fixed within the limiting hole 12 by an interference fit. Both ends of each drive friction shaft 3 extend into the corresponding limiting hole 12 and are fixedly connected to the drive shaft bearing 901. The drive shaft bearing 901 assists in the rotation of the drive friction shaft 3 while restricting its axial degree of freedom. Furthermore, the connecting rod 41 of the driven friction shaft 4 extends to both sides along its own axis. The end of the connecting rod 41 near the drive mechanism holds the first fixing plate 801. The other end of the rod 41 passes through the side wall of the housing 1. A second fixing plate 802 is provided at the end of the connecting rod 41 near the pawl 5. A driven shaft bearing 902 is fixed inside both the first fixing plate 801 and the second fixing plate 802. Each connecting rod 41 is interference-fitted to the inner ring of each driven shaft bearing 902. The driven shaft bearing 902 assists the driven friction shaft 4 in rotating and restricts the circumferential degree of freedom of the driven friction shaft 4. It should be noted that the first fixing plate 801 is fixed to the end face of the housing 1 near the drive mechanism by fasteners, and the second fixing plate 802 is fixed to the end face of the other side of the housing 1 by fasteners, thereby restricting the position of the connecting rod 41.

[0033] The drive shaft 203 of the drive mechanism passes through one of the limiting holes 12 and the drive shaft bearing 901 inside it, and is connected to the drive friction shaft 3 inside the limiting hole 12.

[0034] Please refer to the instruction manual appendix. Figure 1 The housing 1 includes a symmetrical upper cover 101 and a lower cover 102. The axis of symmetry of the upper cover 101 and the lower cover 102 is perpendicular to the axis of the housing 1. Furthermore, both the upper cover 101 and the lower cover 102 are composed of symmetrical half-shells 103 spliced ​​together, and the plane of symmetry between the two half-shells 103 that can be spliced ​​together is coplanar with the axis of the housing 1. When the quick-release device for connecting flange bolts is connected to the high-pressure manifold, the half-shell 103 on the same side of the upper cover 101 and the lower cover 102 can be removed. After the high-pressure manifold is placed into the housing 1, the other half of the half-shell 103 is then installed, so that the high-pressure manifold is fitted inside the quick-release device for connecting flange bolts, which facilitates the engagement of the claws 5 of each connecting rod 41 with the connecting bolts of the connecting flange. Preferably, the upper cover 101, the lower cover 102, and each half-shell 103 are connected by connecting buckles 7. Please refer to the appendix of the instruction manual. Figure 6 The connecting buckle 7 is specifically U-shaped. The vertical rod of the connecting buckle 7 along the axis of the housing 1 passes through the side walls of the upper end cover 101 and the lower end cover 102 respectively, and a connecting nut is screwed on the end of each vertical rod to make the upper end cover 101 and the lower end cover 102 securely connected. The horizontal rod of the connecting buckle 7 perpendicular to the axis of the housing 1 fixes each half of the housing 103 after splicing, so as to prevent the housing 1 from separating due to vibration and other factors during the operation of the quick fastening device for connecting flange bolts, which would affect the installation efficiency.

[0035] Preferably, the inner hole extends a number of elastic teeth 10 towards the side close to its axis. During the assembly and connection of the high-pressure manifold through each half shell 103, the elastic teeth 10 on both sides of the high-pressure manifold abut against the high-pressure manifold. The elastic force of each elastic tooth 10 is used to grip the high-pressure manifold, preventing the shell 1 from sliding along the high-pressure manifold and the claws 5 from separating from the connecting bolts during the tightening of the bolts.

[0036] Please continue to refer to the instruction manual appendix. Figure 1 A plurality of sliding grooves 11 are evenly distributed along the radial direction of the housing 1 on the end face perpendicular to the axis of the inner hole. Each sliding groove 11 is arranged radially, and each connecting rod 41 passes through each sliding groove 11. By tightening the fasteners of the first fixing plate 801 and the second fixing plate 802, the locking state of each connecting rod 41 is released, allowing it to slide along the preset direction of the sliding groove 11, thus changing the distance between the connecting rod 41 and the axis of the inner hole. The operator can slide each connecting rod 41 according to the radius of the connecting flange to be installed, so that the pawl 5 can cooperate with the connecting bolt in the mounting hole of the connecting flange. This application can be applied to connecting flanges of various specifications. It should be noted that the length of the sliding groove 11 is less than the sum of the radii of the active friction shaft 3 and the driven friction shaft 4. That is, when the connecting rod 41 slides to the side away from the axis of the inner hole and moves to the end of the sliding groove 11, there is still a contact part between the active friction shaft 3 and the driven friction shaft 4, and the two can continue to transmit power through friction.

[0037] Preferably, the claw 5 includes a locking part and a connecting part. The locking part has a groove for engaging with the head of the connecting bolt. The connecting part is sleeved inside the connecting rod 41 along its axis. A double-ended bolt 6 perpendicular to its axis is provided on the side wall of the connecting rod 41. The double-ended bolt 6 passes through both the connecting rod 41 and the connecting part inside. Locking nuts are screwed on both sides of the double-ended bolt 6 to lock the position of the double-ended bolt 6 and the connecting rod 41. At the same time, the double-ended bolt 6 fixes the claw 5 to the connecting rod 41. When the specification of the connecting bolt to be installed changes, the locking nuts can be removed and the claw 5 of the corresponding size can be replaced, further improving the applicability of this application.

[0038] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0039] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A quick-release device for connecting flange bolts, characterized in that, include: The housing (1) has an inner hole that mates with a high-pressure manifold. A drive mechanism is provided on one side end face of the housing (1). The inner cavity of the housing (1) is provided with a plurality of active friction shafts (3) around the axis of the inner hole. The output end of the drive mechanism extends into the inner cavity of the housing (1) and is connected to one of the active friction shafts (3). A driven friction shaft (4) is provided between each of the active friction shafts (3). The driven friction shaft (4) is parallel to the active friction shaft (3), and the upper end face of each of the active friction shafts (3) abuts against the lower end face of each of the driven friction shafts (4). A connecting rod (41) extends along the rotation axis of the driven friction shaft (4). The end of the connecting rod (41) away from the drive mechanism passes through the housing (1) and is detachably connected to a pawl (5). The pawl (5) mates with a connecting bolt.

2. The quick-release bolt fastening device for connecting flanges according to claim 1, characterized in that, The drive mechanism includes a motor (201), which is fixed on a mounting base (204). The output end of the motor (201) is connected to a drive shaft (203) via a coupling (202), and the drive shaft (203) is connected to the active friction shaft (3).

3. The quick-release bolt fastening device for connecting flanges according to claim 2, characterized in that, The inner cavity of the housing (1) is provided with a plurality of limiting holes (12) evenly distributed on the two side walls perpendicular to the drive shaft (203). The limiting holes (12) are fixed with drive shaft bearings (901), and each drive shaft bearing (901) is connected to each drive friction shaft (3).

4. The quick-release bolt fastening device for connecting flanges according to claim 3, characterized in that, Each of the connecting rods (41) has a first fixing plate (801) held at one end near the drive mechanism, and a second fixing plate (802) is provided on the side near the claw (5). The first fixing plate (801) and the second fixing plate (802) are fixed to the two end faces of the housing (1) by fasteners. A driven shaft bearing (902) is provided between the first fixing plate (801), the second fixing plate (802) and the connecting rod (41).

5. The quick-release bolt fastening device for connecting flanges according to claim 4, characterized in that, The housing (1) includes an upper end cover (101) and a lower end cover (102) that are symmetrical to each other. The plane of symmetry of the upper end cover (101) and the lower end cover (102) is perpendicular to the axis of the inner hole. The upper end cover (101) and the lower end cover (102) each include two symmetrical half shells (103). The plane of symmetry of each half shell (103) is coplanar with the axis of the inner hole.

6. The quick-release bolt fastening device for connecting flanges according to claim 5, characterized in that, It also includes a connecting buckle (7), which is specifically U-shaped. The two rods of the connecting buckle (7) and the axis of the inner hole are respectively inserted on the side wall of each half shell (103). The connecting buckle (7) is used to splice the mutually symmetrical half shells (103) and connect the upper end cover (101) and the lower end cover (102).

7. The quick-release bolt fastening device for connecting flanges according to claim 6, characterized in that, The housing (1) has a plurality of sliding grooves (11) arranged radially along the diameter direction on both end faces perpendicular to the axis of the inner hole, and the connecting rod (41) can slide in the sliding grooves (11).

8. The quick-release bolt fastening device for connecting flanges according to claim 1, characterized in that, The inner hole sidewall extends along the axis of the inner hole with a plurality of elastic teeth (10), which are used to clamp the high pressure manifold.

9. The quick-release bolt fastening device for connecting flanges according to claim 8, characterized in that, The claw (5) is sleeved inside the connecting rod (41). The claw (5) and the connecting rod (41) are coaxially arranged. The double-ended bolt (6) is vertically inserted through the connecting rod (41) and the claw (5). The double-ended bolt (6) fixes the claw (5) and the connecting rod (41). Locking nuts are screwed on both sides of the double-ended bolt (6). Each locking nut is used to lock the position of the double-ended bolt (6).

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