Readable wrench tool and fastening method

Abstract

The embodiment of the invention discloses a readable wrench tool and a fastening method, and the tool comprises a fixing clamp which is used for fixing a to-be-processed workpiece; one end of the lengthened wrench is used for being connected with the end part of the workpiece to be treated; the crane scale is connected with the other end of the lengthened wrench through a connecting rope; and the travelling crane is connected with the crane scale and is used for driving the lengthened wrench. And the machining convenience and the torque control accuracy are improved.

Description

Technical Field

[0001] This invention relates to the field of workpiece processing, and in particular to a method for manually installing and fastening a readable wrench. Background Technology

[0002] In the pressure vessel industry, different sealing methods are used for gas cylinders with different pressure ratings. For cylinders with pressure ≤10MPa and small storage capacity, threaded seals are typically used, achieving a seal by tightening the threads to generate preload. For cylinders with pressure between 10-25MPa and a storage capacity of around 50L, conical seals are used, forming a line seal by fitting the 60° conical surfaces of the interface together and applying thread preload. For high-pressure cylinders with pressure ≥25MPa and a storage capacity exceeding 100L, the cylinder thread size is larger, generally M80 or higher. The cylinder seal relies on the combined effect of thread preload and copper gasket deformation. The torque required to achieve the sealing function through copper gasket deformation is 6500~8000 N·m. The sustained tensile strength of an average adult is 300~500N, far from meeting the sealing requirements.

[0003] In addition, the maximum output torque of traditional hydraulic high torque wrenches on the market is usually 3000~4000 N·m, which cannot meet the 6500~8000 N·m required for gas cylinder sealing. Imported high torque wrenches usually need to be customized and are very expensive. They also require a hydraulic pump station, resulting in high maintenance costs or complicated operation, making them inconvenient to use.

[0004] There is currently no effective solution to the above problems in existing technologies. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a manual installation and tightening method using a readable wrench. By using a crane to lift and drive an extended wrench, combined with readings from a crane scale, a large torque output is ensured, and precise torque control is achieved. This solves the problem that manual sealing of gas cylinders is ineffective in the prior art.

[0006] To achieve the above objectives, the present invention provides a readable wrench tool, comprising: a fixing clamp for fixing a workpiece to be processed; an extended wrench, one end of which is used to connect with the end of the workpiece to be processed; a crane scale connected to the other end of the extended wrench via a connecting rope; and a crane connected to the crane scale for driving the extended wrench.

[0007] Optionally, the fixing fixture includes a first clamp and a second clamp; the first clamp and the second clamp are connected by anchor bolts, and the space between the first clamp and the second clamp is used to clamp and fix the workpiece to be processed.

[0008] Optionally, the inner surfaces of the first clamp and the second clamp are provided with anti-wear pads.

[0009] Alternatively, the fixing fixture may include stop blocks; the stop blocks are provided on both sides of the workpiece to be processed.

[0010] Optionally, the extended wrench includes a wrench body and an extended socket, wherein the wrench body and the extended socket are detachably connected; and the extended socket is connected to the handle of the wrench body.

[0011] Alternatively, the end of the extended wrench is provided with a hook, which is connected to a connecting rope.

[0012] Alternatively, the crane scale may be a digital display crane scale, which is used to display the tensile force value in real time.

[0013] Optionally, the length of the extended sleeve is calculated based on the target torque of the workpiece to be processed.

[0014] On the other hand, the present invention also provides a fastening method using the above-mentioned readable wrench, comprising: fixing the workpiece to be processed to the worktable using a fixing fixture; engaging the wrench end of the extended wrench with the end nut of the workpiece to be processed; zeroing the reading of the crane scale and controlling the crane to lift vertically at a predetermined speed until the end nut is sealed.

[0015] Further optionally, the predetermined speed is 0.4-0.6 m / min.

[0016] The above technical solution has the following beneficial effects: the workpiece is stably positioned by the fixed clamp, avoiding shaking and rotation of the workpiece during high torque tightening; the lever arm is effectively extended by the extended wrench, realizing the output of ultra-large torque; the hook ring is set at the end of the wrench and used in conjunction with the crane scale and overhead crane, which can reliably transmit the vertical tension as torque output, and the tension value can be read in real time. Combined with the lever arm length, the torque can be intuitively converted, improving the processing convenience and torque control accuracy. Attached Figure Description

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the manually assembled readable wrench provided in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the end structure of the workpiece to be processed provided by existing technology;

[0020] Figure 3 This is a flowchart of the fastening method provided in an embodiment of the present invention.

[0021] Reference numerals: 1-Fixing clamp; 101-Second clamp; 102-First clamp; 103-Anchor screw; 104-Stop pad; 2-Extended wrench; 201-Wrench body; 202-Extended socket; 203-Hook; 3-Connecting rope; 4-Hanging scale; 5-Crane; 6-Workpiece to be processed; 601-End nut; 602-Copper washer. Detailed Implementation

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] To address the problem that manual sealing of gas cylinders is ineffective in existing technologies, this invention provides a manual assembly method using a readable lever. Figure 1 This is a schematic diagram of the manually assembled readable lever provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the tooling includes: a fixing clamp 1 for fixing the workpiece 6 to be processed; an extension wrench 2, one end of which is connected to the end of the workpiece 6; a crane scale 4, which is connected to the other end of the extension wrench 2 via a connecting rope 3; and a crane 5, which is connected to the crane scale 4 and is used to drive the extension wrench 2.

[0024] The fixing fixture 1 is used to stably fix the workpiece 6 to be processed on the workbench or ground platform. The fixing fixture 1 can prevent the workpiece from moving or rotating during the tightening process, so as to ensure the stability of the force and the accuracy of torque transmission.

[0025] One end of the extended wrench 2 is provided with a wrench jaw, which engages with the nut or fastener at the end of the workpiece 6 to be processed. Compared with a regular wrench, the extended wrench 2 has a longer lever arm, so that the entire tooling has the ability to achieve high torque output.

[0026] The crane scale 4 is connected to the other end of the extended wrench 2 via the connecting rope 3. The crane scale 4 is connected to the trolley 5 and is used to display the magnitude of the pulling force during the loading process, thereby realizing the readable torque.

[0027] The overhead crane 5 is connected to the crane scale 4. During operation, the overhead crane 5 provides a vertical lifting force, which is transmitted to the extended wrench 2 through the crane scale 4 and the connecting rope 3, thereby driving the wrench to rotate and fasten the workpiece. The connecting rope 3 is preferably a steel wire rope.

[0028] In operation, the operator first places the workpiece 6 to be processed into the fixed fixture 1 to secure it in place. Then, the extension wrench 2 is engaged with the end of the workpiece 6 to tighten the nut. The tail end of the extension wrench 2 is connected to the crane scale 4 via the connecting rope 3, and then the crane scale 4 is connected to the hook of the gantry crane 5. After the gantry crane 5 starts, the crane scale 4 applies a pulling force to the extension wrench 2 through the connecting rope 3, driving the extension wrench 2 to rotate, thereby tightening the nut. During the process, the crane scale 4 can simultaneously display the magnitude of the pulling force. Combined with the lever arm length of the extension sleeve 202, the actual torque acting on the nut can be calculated, thus achieving visualization and control of the torque magnitude.

[0029] As an optional implementation, the fixing fixture 1 includes a first clamp 102 and a second clamp 101; the first clamp 102 and the second clamp 101 are connected by anchor bolts 103, and the space between the first clamp 102 and the second clamp 101 is used to clamp and fix the workpiece 6 to be processed.

[0030] The first clamp 102 and the second clamp 101 are both arc-shaped structures, capable of clamping and covering the workpiece 6 to be processed from different directions. The two ends of the first clamp 102 and the second clamp 101 are connected to each other by anchor bolts 103, thus forming a closed clamping space between them under the tightening action of the bolts. This clamping space is used to accommodate and fix the workpiece 6 to be processed, ensuring that the workpiece remains stable during the tightening process of the extended wrench 2, preventing loosening or rotation, thereby guaranteeing the accuracy of torque transmission and the reliability of the tightening operation.

[0031] Furthermore, the first clamp 102 and the second clamp 101 form a clamp assembly. To ensure the stability of the workpiece 6 to be processed, two or more clamp assemblies can be provided on the workpiece 6. In this embodiment, two clamp assemblies are preferably provided, respectively located near both ends of the workpiece 6 to be processed.

[0032] As an optional implementation, the inner surfaces of the first clamp 102 and the second clamp 101 are provided with anti-wear pads.

[0033] The anti-wear pad is made of wear-resistant material and is attached to the inner surface of the clamp to reduce friction and wear caused by direct metal-to-metal contact when clamping the workpiece 6. On the one hand, the anti-wear pad can effectively protect the outer surface of the workpiece 6 from scratches or pressure damage; on the other hand, it can also increase the coefficient of friction between the clamp and the workpiece, enhance clamping stability, and thus further ensure that the workpiece does not slip during high-torque clamping.

[0034] Anti-abrasion pads are preferably made of rubber or polyurethane materials to combine anti-slip and wear-resistant properties.

[0035] As an optional implementation, the fixing fixture 1 includes a stop pad 104; the stop pad 104 is used to be disposed on both sides of the workpiece 6 to be processed.

[0036] The stop pad 104 cooperates with the main structure of the fixing fixture 1. After the workpiece is clamped and fixed, the stop pad 104 can provide support and limit the workpiece 6 to be processed. By setting the stop pad 104, when the extended wrench 2 applies a large torque to the nut at the end of the workpiece, it can effectively prevent the workpiece from rotating or shifting in the fixture, avoiding inaccurate torque transmission or operational failure due to workpiece rotation. At the same time, the stop pad 104 is preferably made of a high-strength material with an anti-slip surface to enhance the friction between it and the workpiece, further improving the stability of the workpiece and the reliability of clamping.

[0037] As an optional implementation, the extended wrench 2 includes a wrench body 201 and an extended socket 202, the wrench body 201 and the extended socket 202 being detachably connected; the extended socket 202 is connected to the handle of the wrench body 201.

[0038] The extended wrench 2 includes a wrench body 201 and an extended socket 202. The wrench body 201 and the extended socket 202 adopt a detachable connection structure, for example, by inserting and fixing with a pin or bolt, so as to achieve a firm connection while facilitating disassembly and replacement.

[0039] In addition, the extended socket 202 is fitted and fixed to the handle end of the wrench body 201 to extend the lever arm length of the wrench, so as to obtain a greater output torque under the same tension conditions.

[0040] As an optional implementation, the end of the extended wrench 2 is provided with a hook 203, which is connected to the connecting rope 3.

[0041] The extended wrench 2 has a hook 203 at its end, which is fixed to the end of the extended wrench 2 by welding or bolting and serves as a force-bearing connection component. One end of the connecting rope 3 is connected to the hook 203, so that the pulling force generated by the crane 5 can be transmitted to the extended wrench 2 through the connecting rope 3, thereby driving the wrench to rotate.

[0042] As an optional implementation, the crane scale 4 is a digital display crane scale, which is used to display the tension value in real time.

[0043] The crane scale 4 is a digital display crane scale, which has a digital display screen on its outer casing to display the tensile force value in real time. With the setting of the digital display crane scale 4, the operator can directly read the tensile force during the tightening process, and calculate the corresponding torque by combining it with the lever arm length of the extended wrench 2, thereby realizing intuitive monitoring and precise control of the tightening torque.

[0044] As an optional implementation, the length of the extended sleeve 202 is calculated based on the target torque of the workpiece 6 to be processed.

[0045] Knowing the target torque range that needs to be applied to the nut of the workpiece to be processed and the maximum tensile force that can be provided by manual labor or crane 5, the required lever arm length can be calculated by the torque formula T=F×L (where T is the target torque, F is the tensile force, and L is the distance from the end of the extended wrench 2 to the center of the end nut), thereby determining the design dimensions of the extended sleeve 202.

[0046] Reference Figure 1 , Figure 2 The specific usage method of the above tooling is as follows:

[0047] First, firmly fix the anchor bolt 103 to the workbench. Then, install the first clamp 102 onto the anchor bolt 103. Next, place the gas cylinder onto the first clamp 102, and then use the first clamp 102 to pass through the anchor bolt 103 and fasten it onto the gas cylinder. Tighten the nut to fix the gas cylinder to the fixing fixture 1. Then, insert the stop pads 104 on both sides of the gas cylinder to prevent the gas cylinder from rotating during the tightening process. Then, use the head of the extension wrench 2 to engage with the end nut 601 of the workpiece 6 to ensure a tight fit. Then, insert the extension socket 202 into the wrench body 201 to extend the lever arm. Weld a hook 203 to the end of the socket. Use a shackle to fix one end of the connecting rope 3 to the hook 203. Hook the other end of the connecting rope 3 to the top hook of the crane scale 4. Then, connect the top hook of the crane scale 4 to the hook of the crane 5. At this point, the preparation work is basically completed.

[0048] Then tighten the nut, start the crane 5, and begin lifting. Before lifting, disconnect the connecting rope 3 from the hook 203, and zero the weight reading of the connecting rope 3 on the crane scale 4 to ensure the initial reading is zero. After zeroing, reconnect the connecting rope 3 to the hook 203, and then slowly lift the crane 5 at a speed of 0.5 m / min. During the lifting process, ensure the connecting rope 3 is vertical, and transmit the tension through the connecting rope 3 to the wrench. Drive the wrench to rotate and tighten the end nut 601. The end nut 601 deforms the copper washer 602 by compressing it, ensuring that the deformation of the copper washer 602 completely fills the watertight groove on the contact surface between the gas cylinder and the end nut, thereby achieving a high-pressure seal for the gas cylinder. When the crane scale 4 reaches the target torque value, immediately stop the lifting operation of the crane 5 and maintain the current state for a period of time to ensure the nut is tightened in place.

[0049] Furthermore, during the lifting process of the crane 5, the torque (denoted as T) can be calculated by reading the pulling force (F) or weight (m) of the crane scale 4 and measuring the distance (L) from the end of the extended socket 202 of the wrench to the center of the end nut. T = F × L or T = mg × L (g is taken as 9.8 m / s²). 2 For example, when sealing a gas cylinder, the copper gasket requires a torque of 6500~8000 N·m to deform. The measured distance from the end of the extended wrench 2 to the center of the nut is L=2m. Therefore, the reading of the crane scale 4 needs to be between 350~410kg to meet the sealing requirements.

[0050] This invention also provides a fastening method, characterized in that it employs a readable wrench as described in any one of claims 1-8 for manual installation, comprising:

[0051] S1. Fix the workpiece to be processed onto the worktable using a fixture;

[0052] S2. Engage the extension wrench end onto the end nut of the workpiece to be processed;

[0053] S3. Return the reading of the crane scale to zero, and control the crane to lift vertically at the predetermined speed until the end nut is sealed.

[0054] The workpiece to be processed is fixed to the worktable using a fixing fixture to keep it stable during the subsequent tightening process and prevent it from moving or rotating.

[0055] Engage the extended wrench end onto the nut at the end of the workpiece to be processed, ensuring a tight fit between the wrench and the nut to ensure even force distribution.

[0056] Set the crane scale reading to zero to eliminate the influence of the connecting rope and the weight of the crane scale itself on the reading; then start the crane and control it to lift vertically at a predetermined speed, so that the crane scale provides vertical tension to the extension wrench through the connecting rope, driving the wrench to rotate and thus gradually tightening the nut. Stop lifting when the nut reaches the required tightness for a seal, thus completing the tightening process.

[0057] As an optional implementation, the predetermined speed is 0.4-0.6 m / min.

[0058] In this embodiment, the predetermined speed is preferably 0.5 m / min.

[0059] The above technical solution has the following beneficial effects: the workpiece is stably positioned by the fixed clamp, avoiding shaking and rotation of the workpiece during high torque tightening; the lever arm is effectively extended by the extended wrench, realizing the output of ultra-large torque; the hook ring is set at the end of the wrench and used in conjunction with the crane scale and overhead crane, which can reliably transmit the vertical tension as torque output, and the tension value can be read in real time. Combined with the lever arm length, the torque can be intuitively converted, improving the processing convenience and torque control accuracy.

[0060] The above-described specific embodiments of the invention further illustrate the purpose, technical solution, and beneficial effects of the invention. It should be understood that the above content is only for specific embodiments of the invention and is not intended to limit the scope of protection of the invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A manually operated tamper-evident control, characterized in that, include: A fixing fixture, which is used to fix the workpiece to be processed; An extended wrench, one end of which is used to engage with the end of the workpiece to be processed; A crane scale, wherein the crane scale is connected to the other end of the extended wrench via a connecting rope; A crane, which is connected to the crane scale, is used to drive the extended wrench.

2. The manual assembly of the readable wrench according to claim 1, characterized in that: The fixing clamp includes a first clamp and a second clamp; The first clamp and the second clamp are connected by anchor bolts, and the space between the first clamp and the second clamp is used to clamp and fix the workpiece to be processed.

3. The manual assembly of the readable lever according to claim 2, characterized in that: The inner surfaces of the first clamp and the second clamp are provided with anti-wear pads.

4. The manual assembly of the readable lever according to claim 1, characterized in that: The fixing clamp includes a stop pad; The stop pads are used to be placed on both sides of the workpiece to be processed.

5. The manual assembly of the readable wrench according to claim 1, characterized in that: The extended wrench includes a wrench body and an extended socket, and the wrench body and the extended socket are detachably connected. The extended socket is connected to the handle of the wrench body.

6. The manual assembly of the readable wrench according to claim 1, characterized in that: The extended wrench has a hook at its end, which is connected to a connecting rope.

7. The manual assembly of the readable lever according to claim 1, characterized in that: The crane scale is a digital display crane scale, which is used to display the tensile force value in real time.

8. The manual assembly of the readable wrench according to claim 1, characterized in that: The length of the extended sleeve is calculated based on the target torque of the workpiece to be processed.

9. A fastening method, characterized in that, The manual installation using the readable wrench as described in any one of claims 1-8 includes: The workpiece to be processed is fixed onto the worktable using a fixture. Engage the end of the extended wrench onto the end nut of the workpiece to be processed; Set the crane scale reading to zero, control the crane to lift vertically at the predetermined speed until the end nut is sealed.

10. The fastening method according to claim 9, characterized in that: The predetermined speed is 0.4-0.6 m / min.

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