Mortise and tenon joint type anti-seismic frame structure and machining method

Abstract

A tenon-and-mortise type anti-seismic frame structure comprises a cross beam, a front support, a longitudinal support and a corner bracket, the corner bracket is specifically of a tripod structure, and tripods are distributed in a space rectangular coordinate system; a solid structure at a splicing position is formed at a connecting angle position by inserting a corner bracket, the vibration resistance of the frame structure is enhanced by utilizing the structure, the structure is fixed at a contact position and is connected with a foundation structure by adopting a circumferential welding seam, and the welding seam is filled in an oblong hole at a solid part, so that the solid part and the whole frame form a whole. The connecting structure and the processing method have the advantages that the connecting structure and the processing method can be continuously applied to the frame structures which need to bear high-strength vibration and the frame structures of cabinet products, the connecting structure and the processing method can be applied to the frame structures which need to bear high-strength vibration, and the connecting structure and the processing method can be applied to the frame structures which need to bear high-strength vibration and the frame structures of the cabinet products; and the tolerance and the reliability of the whole system are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical structure design, and relates to a mortise and tenon type earthquake-resistant frame structure and a processing method thereof. Background Art

[0002] Due to the special use environment of marine air-conditioning devices, high-salt and high-humidity marine environments, facing its high-strength vibration resistance requirements, the existing condensing compressor unit frame structure adopts the following structure: ordinary frame structure connection is achieved by welding and splicing of each bracket, overlapping of each bracket to achieve structural reinforcement, or using reinforcing braces at key connection points to strengthen the vibration resistance of the entire structure. The above-mentioned frame structure connection forms cannot meet the high-strength vibration resistance requirements of the marine environment. The weld splicing, overlapping or reinforced brace connection structures have caused varying degrees of cracks and damage at the key parts of the frame under high-intensity experimental conditions, which greatly reduces the service life of the condensing compressor unit on board. At the same time, the unstable frame structure also leaves many safety hazards. Based on the stringent requirements of the above-mentioned use environment on the structure of the condensing compressor unit, while meeting its weight indicators, it is also necessary to meet the vibration resistance strength requirements of the frame structure to meet its use requirements. Summary of the invention

[0003] Purpose of the Invention

[0004] It can meet the marine use environment and test conditions. On the basis of maintaining the original weight index, it strengthens the structural strength of the condensing compressor unit and strengthens the weak connection positions of the frame structure.

[0005] Technical Solution

[0006] A mortise and tenon type earthquake-resistant frame structure, comprising a crossbeam, a front brace, a longitudinal brace, and an angle frame, wherein the angle frame is specifically a tripod structure, and the tripod is distributed in a spatial rectangular coordinate system;

[0007] The crossbeam is a plate-like structure and is formed into a profile by five bendings. The profile is provided with a through hole for inserting one of the legs of the tripod, and the open end of the profile for inserting the tripod has gaps on both sides. The profile is provided with an oblong hole for filling with solder. The front support and longitudinal support have the same structure as the crossbeam. The three legs of the tripod structure are respectively inserted into the crossbeam, the front support and the longitudinal support. The joints are connected by circumferential welds, and the oblong holes are reinforced by secondary welding with filling welds.

[0008] Furthermore, a condensing compressor has four right angles on the upper part, which adopt the mortise and tenon anti-seismic frame structure. The original four corners of the frame are connected to the weak positions, and the weak positions are physically filled by inserting corner brackets, thereby achieving the strengthening effect of the overall structure of the frame.

[0009] Furthermore, there are two oblong holes on the longitudinal support, which are respectively arranged at the same position of the two wall surfaces, so as to insert the angle bracket into the end position of the longitudinal support and connect it by filling solder, so as to prevent the failure and deformation of the frame structure caused by the misalignment of the end of the angle bracket.

[0010] Furthermore, the oblong hole is 8mm×48mm in size. The hole size is determined based on the solder filling welding form, the lap length of the angle bracket and the crossbeam, front support, and longitudinal support, ensuring that more than 70% of the length of the lap structure is the fixed surface to prevent the angle bracket from loosening.

[0011] Furthermore, the cross beam, front support, longitudinal support and corner frame are made of 5A02. The selection of this material not only makes the frame lightweight, but also has good weldability. It also has high corrosion resistance in the high-salt and high-humidity environment under marine conditions, and can meet the use requirements of the frame structure.

[0012] Furthermore, the condensing compressor unit frame is inserted into the through hole after the tripod, and the remaining space in the middle is used for the spatial wiring of the internal electrical equipment. By routing the wiring in the inner cavity, the installation harness of the inner cavity is positioned, so that the circuit of the condensing compressor unit is further optimized, the reliability of the whole machine is improved, and the service life is extended.

[0013] Furthermore, the leg length of the angle bracket is 75mm. The diameter of the internal cavity is 30×30mm. When the leg length is less than 45mm, it is difficult to locate the end of the leg, which is easy to cause movement and cause structural failure. When the leg length is too long, it is not conducive to the weight index restriction. At the same time, it is easy to cause irreparable deformation in installation, which is not conducive to the control of installation accuracy. In summary, the leg length of the tripod is designed to be 60-80mm.

[0014] The corner bracket adopts a tripod structure with a spatial coordinate system distribution formed by machining, and the rigidity and precision requirements of the structure are met through machining.

[0015] The angle bracket is provided with mounting holes for positioning the front cross beam, front support and longitudinal support before welding the frame and for reserving connection holes with the cover plate during the later assembly of the condensing compressor unit.

[0016] The angle bracket adopts a chamfer design to avoid the inner cavity rounded corners of the crossbeam, front support and longitudinal support caused by the bending parts, thereby avoiding installation.

[0017] The corner frames, cross beams, front braces and longitudinal braces are connected by circumferential welds.

[0018] The angle brackets, cross beams, front braces and longitudinal braces are reinforced by secondary welding through long round holes filled with welding, which further ensures the reliability of the connection.

[0019] The processing method of the vibration-resistant frame structure comprises the following steps:

[0020] 1. Environmental adjustment: ambient humidity: 10%, ambient temperature: 20-25°C

[0021] 2. Inspection before welding: Check the tungsten electrode and porcelain nozzle.

[0022] Before welding, the tungsten electrode is ground to 60° and the tip is flattened to ensure that the tip cone is smooth and burr-free. Then a test weld is performed, and the tip reveals the spherical metal color. The porcelain nozzle is 5#, there is no excess material inside the porcelain nozzle, and there is no smoked black sinking on the surface. Before installing the tungsten electrode and porcelain nozzle, wipe them with a dust-free cloth dipped in acetone and let them dry naturally.

[0023] 3. Equipment debugging: preheating furnace heating temperature: 150℃, insulation time: 120min

[0024] Welding: Note: The welding machine should have devices such as advance supply of protective gas, automatic arc starting, arc stabilization, current increase and decrease, automatic arc extinguishing and delayed supply of protective gas, and can easily adjust welding parameters and work stably.

[0025] 4. Repair the groove of parts: Before welding, repair the groove of the welding position of the crossbeam, front support and longitudinal support.

[0026] 5. Remove oxide film: Before argon arc welding, use a wire brush to remove the surface oxide film at the welding position of the crossbeam, front support, longitudinal support, and angle bracket, and clean the area to be welded ≥12㎜.

[0027] 6. Cleaning before welding: Use acetone to clean the dirt on the surface of the specimen.

[0028] 7. Solder pickling: The welding wire is pickled. The welding wire must be used within 4 hours after pickling.

[0029] 8. Welding: The welding gun is perpendicular to the workpiece, and no large swing is allowed. The tungsten electrode is not allowed to stick to the metal splashes to prevent slag and tungsten inclusions. After the circumferential welding is completed, filler welding is performed at the corresponding position for reinforcement.

[0030] Furthermore, there are four tripods, and the welding method is adopted.

[0031] Furthermore, there are four tripods in the frame of the condensing compressor unit, and the welding processing method of the vibration-resistant frame structure is used to perform relevant processing to complete the installation of the corner brackets.

[0032] The beneficial effects of this application are:

[0033] The overall frame body of the condensing compressor unit is composed of sheet metal profiles that have been bent five times. The solid structure at the splicing position is formed by inserting angle brackets at the connection angles. This structure is used to enhance the vibration resistance of the frame structure. The base structure is connected by circumferential welds at the contact position for the fixation of the structure. Long circular hole filling welds are used in the solid part to form a whole with the overall frame. After experimental verification, the frame structure of the condensing compressor unit has passed the high-intensity vibration test of marine equipment. It optimizes the vibration tolerance of the previous frame structure splicing and lap welds, and improves the field service life and reliability of the frame structure of the condensing compressor unit. The connection structure and processing method can be used in frame structures that need to withstand high-intensity vibrations, as well as the frame structure of cabinet products. The tolerance and reliability of the entire system can be improved by local reinforcement of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the framework structure.

[0035] Among them, there are cross beam 1, front support 2, longitudinal support 3, and angle bracket 4.

[0036] Figure 2 Schematic diagram of the corner frame structure.

[0037] Figure 3 Schematic diagram of the internal structure of the crossbeam, front support and longitudinal support

[0038] Figure 4 Overall schematic diagram of the installation location;

[0039] Figure 5 Flowchart of the implementation method. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail in combination with the embodiment of the present invention. In the example, the same or similar reference numerals throughout represent the same or similar originals or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below by reference are exemplary and intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention. The following is a detailed description in combination with the embodiments of the present invention.

[0041] The mortise and tenon type earthquake-resistant frame structure comprises a crossbeam (1), a front brace (2), a longitudinal brace (3), and a corner frame (4), wherein the corner frame (4) is specifically a tripod structure, and the tripod is distributed in a spatial rectangular coordinate system;

[0042] The crossbeam (1) is a plate-like structure and is formed by bending five times. The crossbeam is provided with a through hole for inserting one of the legs of a tripod. The open end of the crossbeam for inserting the tripod has gaps on both sides. The crossbeam is provided with an oblong hole for solder filling. The front support (2) and the longitudinal support (3) have the same structure as the crossbeam (1). The three legs of the tripod structure are respectively inserted into the crossbeam (1), the front support (2) and the longitudinal support (3). The connection is made by circumferential welds, and the oblong holes are reinforced by secondary welding by filling welds.

[0043] In one embodiment of the present invention, a condensing compressor has four right angles on its upper part, which adopt the mortise and tenon anti-seismic frame structure. The original four corners of the frame are connected to the weak positions, and the weak positions are physically filled by inserting corner brackets, thereby achieving the strengthening effect of the overall structure of the frame.

[0044] In a certain embodiment of the present invention, there are two oblong holes on the longitudinal brace (3), which are respectively arranged at the same position on the two wall surfaces, so as to insert the angle bracket into the end position of the longitudinal brace (3) and connect them by filling with solder, so as to prevent the end of the angle bracket from being misaligned and causing failure and deformation of the frame structure.

[0045] In a certain embodiment of the present invention, the oblong hole has a size of 8 mm×48 mm. The size of the hole is determined based on the solder filling welding form, the overlap length of the angle bracket (4) and the crossbeam (1), the front support (2), and the longitudinal support (3), ensuring that more than 70% of the length of the overlap structure is the fixed surface to prevent the angle bracket (4) from loosening.

[0046] In a certain embodiment of the present invention, the cross beam (1), front support (2), longitudinal support (3), and corner bracket (4) are made of 5A02. The selection of this material not only makes the frame lightweight, but also has good weldability, and also has high corrosion resistance in the high-salt and high-humidity environment under marine conditions, and can meet the use requirements of the frame structure.

[0047] In a certain implementation case of the present invention, the condensing compressor unit frame is inserted into the through hole after the tripod, and the remaining space in the middle is used for the spatial wiring of the internal electrical equipment. By routing the wiring in the inner cavity, the installation harness of the inner cavity is positioned, so that the circuit of the condensing compressor unit is further optimized, the reliability of the whole machine is improved, and the service life is extended.

[0048] In a certain embodiment of the present invention, the leg length of the angle bracket (4) is 75 mm. The diameter of the internal cavity is 30×30 mm. When the leg length is less than 45 mm, it is difficult to locate the end of the leg, which is prone to movement and structural failure. When the leg length is too long, it is not conducive to the weight index restriction. At the same time, it is easy to cause irreparable deformation during installation, which is not conducive to the control of installation accuracy. In summary, the leg length of the bracket (4) is designed to be 60 to 80 mm.

[0049] The corner bracket (4) adopts a tripod structure with a spatial coordinate system distribution formed by machine integration, and the rigidity and precision requirements of the structure are met through machine integration.

[0050] The angle bracket (4) is provided with installation holes for positioning the front cross beam (1), the front support (2), and the longitudinal support (3) during the frame welding and for pre-reserving connection holes with the cover plate during the later assembly process of the condensing compressor unit.

[0051] The angle bracket (4) adopts a chamfer design to avoid the inner cavity rounded corners of the crossbeam (1), the front support (2) and the longitudinal support (3) caused by the bending parts, thereby avoiding installation.

[0052] The corner frame (4), the crossbeam (1), the front support (2) and the longitudinal support (3) are connected at the joints by means of circumferential welds.

[0053] The angle bracket (4) and the cross beam (1), the front support (2) and the longitudinal support (3) are reinforced by secondary welding through the long round holes for filling welding, thereby further ensuring the reliability of the connection.

[0054] The welding processing method of the vibration-resistant frame structure comprises the following steps

[0055] 1. Environmental adjustment: ambient humidity: 10%, ambient temperature: 20-25°C

[0056] 2. Inspection before welding: Check the tungsten electrode and porcelain nozzle.

[0057] Before welding, the tungsten electrode is ground to 60° and the tip is flattened to ensure that the tip cone is smooth and burr-free. Then a test weld is performed, and the tip reveals the spherical metal color. The porcelain nozzle is 5#, there is no excess material inside the porcelain nozzle, and there is no smoked black sinking on the surface. Before installing the tungsten electrode and porcelain nozzle, wipe them with a dust-free cloth dipped in acetone and let them dry naturally.

[0058] 3. Equipment debugging: preheating furnace heating temperature: 150℃, insulation time: 120min

[0059] Welding: Note: The welding machine should have devices such as advance supply of protective gas, automatic arc starting, arc stabilization, current increase and decrease, automatic arc extinguishing and delayed supply of protective gas, and can easily adjust welding parameters and work stably.

[0060] 4. Beveling of parts: Before welding, bevel the welding positions of the cross beam (1), front support (2) and longitudinal support (3).

[0061] 5. Remove the oxide film: Before argon arc welding, use a wire brush to remove the oxide film on the surface of the welding position of the crossbeam (1), front support (2), longitudinal support (3), and angle bracket (4), and clean the area to be welded ≥12mm.

[0062] 6. Cleaning before welding: Use acetone to clean the dirt on the surface of the specimen.

[0063] 7. Solder pickling: The welding wire is pickled. The welding wire must be used within 4 hours after pickling.

[0064] 8. Welding: The welding gun is perpendicular to the workpiece, and no large swing is allowed. The tungsten electrode is not allowed to stick to the metal splashes to prevent slag and tungsten inclusions. After the circumferential welding is completed, filler welding is performed at the corresponding position for reinforcement.

[0065] (1-8) is a tripod welding method

[0066] In a certain implementation case of the present invention, there are four tripods in the frame of the condensing compressor unit, and the welding processing method of the vibration-resistant frame structure is used to perform relevant processing to complete the installation of the corner brackets.

[0067] The present invention discloses a mortise and tenon type earthquake-resistant frame structure and a processing method thereof, comprising a cross beam (1), a front support (2), a longitudinal support (3), and an angle bracket (4), wherein the tripod angle bracket (4) connects the cross beam (1), the front support (2), and the longitudinal support (3) to strengthen the structure and is connected by an I-shaped weld. At the same time, oblong holes are opened on the sides of the cross beam (1), the front support (2), and the longitudinal support (3) to perform secondary welding reinforcement on the angle bracket and the frame structure by filling with solder, thereby improving the strength of the frame structure.

[0068] Test verification results

[0069] Test conditions:

[0070] Frequency range 10~90Hz, speed 35mm / s, sweep rate 1oct / min, sweep times 10 times;

[0071] Frequency range 90~200Hz, acceleration 20m / s2, sweep rate 1oct / min, sweep times 10 times;

[0072] The dangerous frequency point that appears in the frequency sweep is vibrated continuously for 2 hours;

[0073] The above tests are carried out on the X, Y and Z directions of the frame.

[0074] Test process:

[0075] In the test, frequency sweep vibration X, Y, Z is first performed.

[0076] Frequency range 10~90Hz, speed 35mm / s, sweep rate 1oct / min, sweep times 10 times;

[0077] Frequency range 90~200Hz, acceleration 20m / s2, sweep rate 1oct / min, sweep times 10 times;

[0078] After the frequency sweep in three directions, the resonance points in three directions are found as follows, and the vibration resistance test is carried out

[0079] X-axis vibration resistance points: 22.4Hz, 34.2Hz, 185.34Hz; there are three resonance points in the X-axis, and each resonance point vibrates for 0.5 hours.

[0080] Y-axis vibration resistance point: 26.207Hz; a resonance point appears in the Y-axis, which vibrates for 2 hours.

[0081] Vibration resistance point in Z direction: 175.82Hz; a resonance point appears in Z direction, which vibrates for 2 hours.

[0082] Test results:

[0083] There was no deformation or fracture in the structural parts or their joints, and the vibration test was passed.

[0084] It is understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and unless defined as here, will not be interpreted with idealized or overly formal meanings. The specific implementation methods described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Within the spirit and principle of the present invention, any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment of equivalent changes for application in other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution content of the present invention, any modification, equivalent replacement, improvement, etc., made according to the technical essence of the present invention, should be included in the protection scope of the present invention.

Claims

1. A mortise and tenon type earthquake-resistant frame structure, characterized in that: It includes a crossbeam, a front support, a longitudinal support, and a corner frame, wherein the corner frame is specifically a tripod structure, and the tripod is distributed in a spatial rectangular coordinate system; The crossbeam is a plate-like structure and is formed into a profile by five bendings. The profile is provided with a through hole for inserting one of the legs of the tripod, and the open end of the profile for inserting the tripod has gaps on both sides. The profile is provided with an oblong hole for filling with solder. The front support and longitudinal support have the same structure as the crossbeam. The three legs of the tripod structure are respectively inserted into the crossbeam, the front support and the longitudinal support. The joints are connected by circumferential welds, and the oblong holes are reinforced by secondary welding with filling welds.

2. A condensing compressor, characterized in that: The four right angles on the upper part adopt the frame structure as claimed in claim 1.

3. The frame structure according to claim 2, characterized in that: There are two oblong holes on the longitudinal support, which are respectively arranged at the same position of the two wall surfaces; they are used to insert the angle bracket into the end position of the longitudinal support and connect it by filling solder, so as to prevent the failure and deformation of the frame structure caused by the misalignment of the end of the angle bracket.

4. The frame structure according to claim 3, characterized in that: The oblong hole has a size of 8mm×48mm; the size of the hole is determined based on the solder filling welding form, the lap length of the angle bracket and the crossbeam, front support, and longitudinal support, ensuring that more than 70% of the length of the lap structure is the fixed surface to prevent the angle bracket from loosening.

5. The frame structure according to claim 4, characterized in that: The material for the crossbeam, front brace, longitudinal brace and corner bracket is 5A02.

6. The frame structure according to claim 5, characterized in that: The condensing compressor unit frame is inserted into the through hole behind the tripod, and the remaining space in the middle is used for spatial wiring of internal electrical equipment; the installation wiring harness of the inner cavity is positioned by routing the wiring in the inner cavity.

7. The frame structure according to claim 6, characterized in that: The leg length of the angle bracket is 75mm; the diameter of the internal cavity is 30×30mm; the angle bracket adopts a tripod structure distributed in a spatial coordinate system formed by one-piece machining, and the rigidity and precision requirements of the structure are met by one-piece machining; the angle bracket is equipped with mounting holes for positioning the front cross beam, front support and longitudinal support before welding the frame and for reserving connection holes with the cover plate during the later assembly of the condensing compressor unit; the angle bracket adopts a chamfer design to avoid the inner cavity fillet caused by the bending parts of the cross beam, front support and longitudinal support to avoid installation; the connection between the angle bracket, cross beam, front support and longitudinal support is connected in the form of circumferential welds; the angle bracket and the cross beam, front support and longitudinal support are reinforced by secondary welding in the form of filling welding through oblong holes.

8. The method for processing the frame structure as claimed in claim 7, comprising the following steps: 1). Environmental adjustment: ambient humidity: 10%, ambient temperature: 20~25℃ 2). Inspection before welding: Check the tungsten electrode and porcelain nozzle; Before welding, the tungsten electrode is ground to 60° and the tip is flattened to ensure that the tip cone is smooth and burr-free; then a test weld is performed, and the tip reveals a spherical metal color; the porcelain nozzle is 5#, there is no excess material inside the porcelain nozzle, and there is no smoked black sinking on the surface. Before installing the tungsten electrode and porcelain nozzle, wipe them with a dust-free cloth dipped in acetone and let them dry naturally; 3). Equipment debugging: Preheating furnace heating temperature: 150℃, insulation time: 120min Welding: Note: The welding machine should have the devices of shielding gas advance supply, automatic arc starting, arc stabilization, current increase and decrease, automatic arc extinguishing and shielding gas delayed supply, and can conveniently adjust the welding parameters and work stably; 4). Parts beveling: Bevel the welding positions of the beam, front support and longitudinal support before welding; 5). Remove the oxide film: Use a wire brush to remove the surface oxide film at the welding position of the beam, front support, longitudinal support, and angle bracket before argon arc welding, and clean the area to be welded ≥12mm; 6). Cleaning before welding: Use acetone to clean the dirt on the surface of the specimen; 7). Solder pickling: The welding wire is pickled; the welding wire must be used within 4 hours after pickling; 8). Welding: The welding gun is perpendicular to the workpiece, large swing is not allowed, the tungsten electrode is not allowed to stick to the metal splash, and slag and tungsten inclusion are prevented; after the circumferential welding is completed, filler welding is performed at the corresponding position for reinforcement.

9. The method according to claim 8, characterized in that There are four tripods, and the welding method is adopted.

10. The method according to claim 9, characterized in that There are four tripods in the frame of the condensing compressor unit, all of which are processed by welding processing methods of anti-vibration frame structures to complete the installation of the corner brackets.

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