A device for bevel grinding of pipe fittings

Abstract

The present invention discloses a device for grinding the bevel of pipe fittings, comprising: a fixator, a grinding frame, a grinding machine and a connecting shaft; the grinding frame is arranged on one side of the fixator, and the grinding machine is installed on the top of the grinding frame; the fixator can be inserted into the interior of the pipe and fit against the inner wall of the pipe, a flange is provided on the outer periphery of one end of the fixator close to the grinding frame, and a through hole allowing the connecting shaft to be inserted is axially formed in the fixator; one end of the connecting shaft can be inserted into the through hole, the other end of the connecting shaft is installed on the grinding frame, a limiting structure is provided at the end of the connecting shaft far from the grinding frame, and the limiting structure can be stuck at the end of the through hole close to the grinding frame; the connecting shaft can rotate in the through hole and slide along the axial direction of the through hole, and the connecting shaft can adjust its position in the vertical direction on the grinding frame. It overcomes the problem that most of the on-site pipes still adopt the manual grinding method to make bevels at present, which is time-consuming and laborious, and it is very difficult to guarantee the grinding accuracy and surface quality.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe grinding machines, and particularly to a device for grinding pipe fittings bevels. Background Art

[0002] The pipe orifice needs to be pre-made with a bevel before the butt joint process can be carried out. In most cases, the bevels of the pipes transported to the construction site have been prefabricated in the workshop. However, due to the complexity of the on-site construction environment and some uncertain factors, it is often necessary to make new bevels. If the pipes are transported back to the workshop for production, not only will the construction period be delayed, but also considerable transportation costs will be incurred, wasting manpower and financial resources.

[0003] Most of the existing on-site grinding equipment is turning-type grinding, which is large in size and heavy in weight, requiring a sufficiently large operating space. However, many on-site locations do not have a sufficiently large operating space, and it is not easy to move the heavy equipment, which limits the use of the equipment. For the above reasons, at present, most on-site bevels are still made by manual grinding, which is time-consuming and laborious, and it is very difficult to ensure the grinding accuracy and surface quality. Summary of the Invention

[0004] The present invention provides a device for grinding pipe fittings bevels to overcome the problems that most of the on-site pipes are still made by manual grinding at present, which is time-consuming and laborious, and it is very difficult to ensure the grinding accuracy and surface quality.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] A device for grinding pipe fittings bevels includes: a fixator, a grinding frame, a grinding machine and a connecting shaft;

[0007] The grinding frame is arranged on one side of the fixator, and the grinding machine is installed on the top of the grinding frame;

[0008] The fixator can be inserted into the pipe interior and fit against the pipe inner wall. A flange is provided on the outer periphery of the end of the fixator close to the grinding frame, and a through hole allowing the connecting shaft to be inserted is axially formed in the fixator;

[0009] One end of the connecting shaft can be inserted into the through hole, the other end of the connecting shaft is installed on the grinding frame, and a limiting structure is provided at the end of the connecting shaft away from the grinding frame. The limiting structure can be stuck at the end of the through hole close to the grinding frame;

[0010] The connecting shaft can rotate in the through hole and slide along the axial direction of the through hole, and the connecting shaft can adjust its position vertically on the grinding frame.

[0011] Further, the fixator is a tensioner, and the tensioner includes a first positioning disk, a second positioning disk, a wedge block and a screw;

[0012] The first positioning disk and the second positioning disk are fixedly connected, and the first positioning disk and the second positioning disk are on the same axis;

[0013] At least two wedge block mating parts distributed in a circular array around the axis of the first positioning disk are provided on the first positioning disk, and a flange is provided on the outer periphery of the end of the second positioning disk away from the first positioning disk;

[0014] The wedge block mating part includes a wedge block mounting hole and an arc-shaped groove. The concave direction of the arc-shaped groove is away from the center of the first positioning disk. The wedge block mounting hole is arranged at one end of the arc-shaped groove. A first inclined surface is provided on one side of the wedge block mounting hole close to the other end of the arc-shaped groove, and a notch is provided on the side of the wedge block mounting hole away from the center of the first positioning disk;

[0015] The wedge block is placed in the wedge block mounting hole, and a first wedge block inclined surface slidably matched with the first inclined surface is provided on the wedge block;

[0016] One end of the screw rod with a screw rod head penetrates through the second positioning disk, and the other end of the screw rod is threadedly connected with the wedge block.

[0017] Further, the fixer includes a sleeve, and a flange is provided on the outer periphery of one end of the sleeve.

[0018] Further, the grinding frame includes a main beam, a main beam slider mechanism and a radial feed mechanism;

[0019] The main beam is arranged on one side of the fixer, and the grinding machine is fixed on the top of the main beam;

[0020] One end of the connecting shaft is fixedly arranged on the main beam slider mechanism;

[0021] The main beam slider mechanism is connected with the radial feed mechanism, and the main beam slider mechanism can slide along the main beam;

[0022] The radial feed mechanism is arranged at the bottom of the main beam, and the radial feed mechanism can drive the main beam slider mechanism to reciprocate in the vertical direction.

[0023] Further, the main beam slider mechanism includes a first main beam slider, a second main beam slider, a slider screw rod and a positioning shaft;

[0024] The first main beam slider is arranged on the side of the main beam close to the fixer, the second main beam slider is arranged on the side of the main beam away from the fixer. The first main beam slider is provided with a threaded hole for installing the slider screw rod, the second main beam slider is provided with a through hole through which the slider screw rod can pass. The second main beam slider can slide along the slider screw rod. The first main beam slider and the second main beam slider are connected by the slider screw rod, and the opposite surfaces of the first main beam slider and the second main beam slider abut against the main beam;

[0025] The positioning shaft is vertically fixed on the second slider of the main beam, and a positioning hole with a clearance fit with the positioning shaft is provided on the first slider of the main beam.

[0026] Furthermore, it also includes a connecting shaft support seat. The connecting shaft support seat is fixed on the side of the first slider of the main beam close to the fixator, and one end of the connecting shaft close to the first slider of the main beam penetrates through the connecting shaft support seat;

[0027] A clamping groove is provided on the side of the first slider of the main beam close to the fixator. One side of the outer periphery of the end of the connecting shaft close to the first slider of the main beam is flattened to form a plane. The end of the connecting shaft close to the first slider of the main beam is placed in the clamping groove and the plane fits against the inner wall of the clamping groove.

[0028] Furthermore, it also includes a scale structure. The scale structure includes an arrow pointer and a scale. The scale is fixed on the side of the main beam away from the connecting shaft, and the arrow pointer is fixed on the second slider of the main beam, and the arrow pointer points to the scale.

[0029] Furthermore, the radial feed mechanism includes an adjusting screw and an adjusting mechanism seat;

[0030] The adjusting mechanism seat is fixed at the bottom of the main beam. The adjusting mechanism seat includes a base and a cover plate. The base and the cover plate are fixedly connected and enclose an adjusting screw mounting hole that allows the adjusting screw to rotate along the axis of the adjusting screw;

[0031] One end of the adjusting screw is provided with a thread, the other end of the adjusting screw is provided with a head, and a limit stop is provided at one end of the adjusting screw close to the head. The limit stop and the head are respectively located at both ends of the adjusting screw mounting hole;

[0032] The end of the adjusting screw with the thread is threadedly connected to the second slider of the main beam.

[0033] Furthermore, the limiting structure includes a positioning pin shaft, an elastic plunger, and a plurality of limiting parts arranged along the axial direction of the connecting shaft;

[0034] The limiting part includes a pin shaft hole and a plunger hole whose axes intersect. The intersection point of the axes of the pin shaft hole and the plunger hole is located on the axis of the connecting shaft. An elastic plunger is provided in the plunger hole, and the elastic plunger is embedded in the plunger hole;

[0035] A circle of depression is provided in the middle of the positioning pin shaft. After the positioning pin shaft is inserted into the pin shaft hole, the end of the elastic plunger can be stuck in the depression.

[0036] Furthermore, it also includes a dust suction device;

[0037] The dust suction device includes a dust suction hood and a dust suction pipe. The dust suction hood is fixed on the grinding frame by bolts. The opening of the dust suction hood is arranged relative to the grinding wheel of the grinding machine. The dust suction pipe is communicated with the dust suction hood, and the dust suction pipe can be externally connected to a vacuum cleaner.

[0038] Advantages of the present invention:

[0039] A device for grinding the bevel of a pipe fitting provided by the present invention includes: a fixator, a grinding frame, a grinding machine and a connecting shaft. The grinding frame is arranged on one side of the fixator. The grinding machine is installed on the top of the grinding frame. The fixator is inserted into the interior of the pipe to fit the inner wall of the pipe. The connecting shaft is inserted into the through hole of the fixator and rotates and slides axially along the through hole, so that the grinding machine can complete the circumferential and axial grinding of the pipe;

[0040] The connecting shaft in the through hole of the fixator inside the pipe can adjust its position vertically on the grinding frame, so that the grinding machine can adjust its position radially along the pipe, ensuring that the grinding wheel of the grinding machine can contact the outer wall of the pipe for grinding;

[0041] The flange provided on the bottom fixator is stuck at the end of the pipe for limiting after the bottom fixator is inserted into the pipe. The connecting shaft is inserted into the through hole and slides axially along the through hole until the limiting structure provided on the connecting shaft is stuck at the end of the through hole for limiting, so that the positions of the pipe, the bottom fixator and the connecting shaft remain unchanged axially when they cooperate;

[0042] A device for grinding the bevel of a pipe fitting provided by the present invention grinds the bevel of the pipe through the mutual cooperation of the fixator, the grinding frame, the grinding machine and the connecting shaft. The device is light and easy to operate, requires a small operation space, has low requirements for the length and fixing method of the pipe, and can be conveniently used in some complex occasions. Compared with manual grinding, the grinding efficiency is higher and it is easier to ensure the grinding accuracy and surface quality. Description of the Drawings

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0044] Figure 1 Structural schematic of a device for grinding the bevel of a pipe fitting (the fixator is a tensioner) disclosed by the present invention Figure 1 ;

[0045] Figure 2 Structural schematic of a device for grinding the bevel of a pipe fitting (the fixator is a tensioner) disclosed by the present invention Figure 2 ;

[0046] Figure 3 Structural schematic of the connecting shaft, main beam slider mechanism and radial feed mechanism of a device for pipe fitting groove grinding disclosed by the present invention Figure 1 ;

[0047] Figure 4 Structural schematic of the connecting shaft, main beam slider mechanism and radial feed mechanism of a device for pipe fitting groove grinding disclosed by the present invention Figure 2 ;

[0048] Figure 5 Structural schematic diagram of the main beam slider mechanism of a device for pipe fitting groove grinding disclosed by the present invention;

[0049] Figure 6 Structural schematic diagram of the adjustment mechanism base of a device for pipe fitting groove grinding disclosed by the present invention;

[0050] Figure 7 Structural schematic diagram of the connecting shaft of a device for pipe fitting groove grinding disclosed by the present invention;

[0051] Figure 8 is Figure 3 B - B sectional view of;

[0052] Figure 9 Assembly schematic diagram of the connecting shaft and the first main beam slider of a device for pipe fitting groove grinding disclosed by the present invention;

[0053] Figure 10 Structural schematic diagram of the dust suction device of a device for pipe fitting groove grinding disclosed by the present invention;

[0054] Figure 11 Structural schematic diagram of the tensioner of a device for pipe fitting groove grinding disclosed by the present invention;

[0055] Figure 12 Front view of the first positioning disc of the tensioner of a device for pipe fitting groove grinding disclosed by the present invention;

[0056] Figure 13 Structural schematic diagram of the first positioning disc of the tensioner of a device for pipe fitting groove grinding disclosed by the present invention;

[0057] Figure 14 Structural schematic diagram of the second positioning disc of the tensioner of a device for pipe fitting groove grinding disclosed by the present invention;

[0058] Figure 15 Structural schematic diagram of the wedge block of the tensioner of a device for pipe fitting groove grinding disclosed by the present invention;

[0059] Figure 16 Schematic structural diagram of the connecting sleeve of the tensioner of a device for pipe fitting bevel grinding disclosed by the present invention;

[0060] Figure 17 Cross-sectional view of the tensioner of a device for pipe fitting bevel grinding disclosed by the present invention;

[0061] Figure 18 Schematic structural diagram of a device for pipe fitting bevel grinding (the fixator is a sleeve) disclosed by the present invention;

[0062] Figure 19 Cross-sectional view of the sleeve of a device for pipe fitting bevel grinding disclosed by the present invention;

[0063] Figure 20 Assembly schematic diagram of the device for pipe fitting bevel grinding disclosed by the present invention in cooperation with the pipe fitting.

[0064] In the figure:

[0065] 1. First positioning disk; 11. Wedge block mounting hole; 111. First inclined surface; 112. Second inclined surface; 113. Notch; 12. Arc-shaped groove; 13. Stress relief hole; 14. First flange placing groove;

[0066] 2. Second positioning disk; 21. Observation hole; 22. Second flange placing groove;

[0067] 3. Wedge block; 31. First inclined surface of the wedge block; 32. Second inclined surface of the wedge block;

[0068] 4. Connecting sleeve; 41. Flange;

[0069] 5. Screw rod;

[0070] 6. Copper sleeve; 61. Copper sleeve flange;

[0071] 7. Connecting shaft; 71. Pin shaft hole; 72. Plunger hole; 73. Positioning pin shaft; 74. Elastic plunger;

[0072] 81. Main beam; 811. Main beam guiding groove; 812. Base mounting hole;

[0073] 82. Main beam slider mechanism; 821. First slider of the main beam; 8211. Card slot; 8212. Positioning hole; 822. Second slider of the main beam; 823. Slider screw rod; 824. Positioning shaft; 825. Connecting shaft support seat;

[0074] 83. Radial feed mechanism; 831. Adjusting screw rod; 8311. Head; 8312. Limit stop block; 832. Base; 833. Cover plate; 834. Adjusting screw rod mounting hole;

[0075] 84. Handle;

[0076] 91. Motor; 92. Grinding wheel;

[0077] 101. Arrow pointer; 102. Scale;

[0078] 1101. Dust suction hood; 1102. Dust suction pipe; 1103. Hand-tightening bolt; 1104. Socket;

[0079] 1201. Sleeve;

[0080] A. Pipe material. Detailed implementation manners

[0081] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0082] Embodiment 1

[0083] This embodiment provides a device for grinding the bevel of a pipe fitting, as Figure 1 and Figure 2 shown, including: a fixator, a grinding frame, a grinding machine and a connecting shaft 7;

[0084] The grinding frame is arranged on one side of the fixator, and the grinding machine is installed on the top of the grinding frame;

[0085] The fixator can be inserted into the interior of the pipe material and fit against the inner wall of the pipe material. A flange is provided on the outer periphery of one end of the fixator close to the grinding frame, and a through hole allowing the connecting shaft 7 to be inserted is axially formed in the fixator;

[0086] One end of the connecting shaft 7 can be inserted into the through hole, the other end of the connecting shaft 7 is installed on the grinding frame, and a limiting structure is provided at the end of the connecting shaft 7 far from the grinding frame. The limiting structure can be stuck at the end of the through hole close to the grinding frame;

[0087] The connecting shaft 7 can rotate in the through hole and slide axially along the through hole, so that the grinding machine can rotate around the pipe material and slide axially along the through hole. The connecting shaft 7 can adjust its position vertically on the grinding frame, so that the grinding machine can adjust its position radially along the pipe material, ensuring that the grinding wheel of the grinding machine can contact the outer wall of the pipe material for grinding;

[0088] The flange provided on the bottom fixing device is stuck at the end of the pipe after the bottom fixing device is inserted into the pipe for limit. After the connecting shaft 7 is inserted into the through hole, it slides axially along the through hole until the limit structure provided on the connecting shaft 7 is stuck at the end of the through hole for limit, so that the positions of the pipe, the bottom fixing device and the connecting shaft 7 remain unchanged in the axial direction of the pipe during cooperation;

[0089] A device for grinding the pipe fitting bevel provided in this embodiment grinds the pipe fitting bevel through the cooperation of a fixing device, a grinding frame, a grinding machine and a connecting shaft 7. Compared with manual grinding, the grinding efficiency is higher and it is easier to ensure the grinding accuracy and surface quality.

[0090] In a specific embodiment, the fixing device is a tensioner, such as Figure 11 shown, the tensioner includes a first positioning disk 1, a second positioning disk 2, a wedge block 3 and a screw rod 5;

[0091] The first positioning disk 1 and the second positioning disk 2 are fixedly connected, and the first positioning disk 1 and the second positioning disk 2 are on the same axis;

[0092] At least two wedge block mating parts are provided on the first positioning disk 1 and are distributed in a circular array around the axis of the first positioning disk 1. A flange is provided on the outer periphery of the end of the second positioning disk 2 away from the first positioning disk 1;

[0093] The flange causes the second positioning disk 2 to be stuck at the end of the pipe for limit after the first positioning disk 1 is inserted into the inner hole of the pipe;

[0094] Such as Figure 12 shown, the wedge block mating part includes a wedge block mounting hole 11 and an arc-shaped groove 12. The depression direction of the arc-shaped groove 12 is away from the center of the first positioning disk 1. The wedge block mounting hole 11 is arranged at one end of the arc-shaped groove 12. A first inclined surface 111 is provided on one side of the wedge block mounting hole 11 close to the other end of the arc-shaped groove 12, and a notch 113 is provided on the side of the wedge block mounting hole 11 away from the center of the first positioning disk 1;

[0095] The notch 113, the wedge block mounting hole 11 and the arc-shaped groove 12 form a deformable area on the outer periphery of the first positioning disk 1, and the outer periphery of the first positioning disk 1 abuts against the inner wall of the pipe through the deformable area;

[0096] The wedge block 3 is placed in the wedge block mounting hole 11, such as Figure 15 shown, and a first wedge block inclined surface 31 that slidably cooperates with the first inclined surface 111 is provided on the wedge block 3;

[0097] One end of the screw rod 5 with a screw rod head penetrates through the second positioning disk 2, and the other end of the screw rod 5 is threadedly connected to the wedge block 3. In this embodiment, the axis of the screw rod 5 is parallel to the axis of the first positioning disk 1;

[0098] The operator can tighten the screw rod 5 to axially displace the wedge block 3 along the first positioning disk 1, so that the first inclined surface 31 of the wedge block 3 slides relative to the first inclined surface 111, and then the deformable area on the outer periphery of the first positioning disk 1 is elastically deformed after being stressed to abut against the inner wall of the pipe.

[0099] At least two wedge block mating parts are arranged on the first positioning disk 1 and distributed in a circular array around the axis. The operator tightens the screw rod 5 in turn following the principles of cross symmetry and step-by-step tightening. While realizing the tension of the first positioning disk 1 in the pipe, the coaxiality of the two is ensured, and finally the grinding accuracy is ensured.

[0100] In a specific embodiment, as Figure 2 shown, the grinding frame includes a main beam 81, a main beam slider mechanism 82 and a radial feed mechanism 83;

[0101] The main beam 81 is arranged on one side of the fixator, and the grinding machine is fixed on the top of the main beam 81;

[0102] One end of the connecting shaft 7 is fixed on the main beam slider mechanism 82;

[0103] The main beam slider mechanism 82 is connected to the radial feed mechanism 83, and the main beam slider mechanism 82 can slide along the main beam 81;

[0104] The radial feed mechanism 83 is arranged at the bottom of the main beam 81, and the radial feed mechanism 83 can drive the main beam slider mechanism 82 to reciprocate in the vertical direction.

[0105] In a specific embodiment, as Figures 3 to 5 shown, the main beam slider mechanism 82 includes a first main beam slider 821, a second main beam slider 822, a slider screw rod 823 and a positioning shaft 824;

[0106] The first main beam slider 821 is arranged on the side of the main beam 81 close to the fixator, the second main beam slider 822 is arranged on the side of the main beam 81 far from the fixator. The first main beam slider 821 is provided with a threaded hole for installing the slider screw rod 823, the second main beam slider 822 is provided with a through hole through which the slider screw rod 823 can pass. The second main beam slider 822 can slide along the slider screw rod 823. The first main beam slider 821 and the second main beam slider 822 are connected by the slider screw rod 823, and the opposite surfaces of the first main beam slider 821 and the second main beam slider 822 abut against the main beam 81;

[0107] The positioning shaft 824 is vertically fixed on the second main beam slider 822, and a positioning hole 8212 with a clearance fit with the positioning shaft 824 is arranged on the first main beam slider 821;

[0108] The slider screw 823 is threadedly connected to the first slider 821 of the main beam. The second slider 822 of the main beam slides along the slider screw 823. By tightening or loosening the slider screw 823, the distance between the first slider 821 and the second slider 822 of the main beam can be adjusted;

[0109] The positioning shaft 824 is inserted into the positioning hole 8212 with clearance fit. The two positioning shafts 824 can prevent the relative positions of the through holes and threaded holes of the first slider 821 and the second slider 822 of the main beam from shifting, ensuring the relative position accuracy of the first slider 821 and the second slider 822 of the main beam and avoiding the problem of inaccurate groove angle;

[0110] In this embodiment, as Figure 2 shown, a main beam guide groove 811 is provided on the main beam 81. The main beam guide groove 811 enables the slider screw 823 and the positioning shaft 824 to move vertically without interference. The radial feed mechanism 83 drives the second slider 822 of the main beam to slide along the length direction of the main beam guide groove 811, and the first slider 821 of the main beam slides together with the second slider 822 of the main beam;

[0111] By tightening or loosening the slider screw 823 to adjust the distance between the first slider 821 and the second slider 822 of the main beam, the main beam slider mechanism 82 can move vertically on the main beam 81 and be locked and fixed at any position within the movement range (in this embodiment, the movement range is within the length of the main beam guide groove 811).

[0112] In practical applications, the settings of the through holes and threaded holes on the first slider 821 and the second slider 822 of the main beam, on the premise of ensuring one-to-one correspondence between the through holes and the threaded holes, are not limited to the form described above. The positions of the through holes and the threaded holes can be interchanged, that is, a threaded hole capable of installing the slider screw 823 can be provided on the second slider 822 of the main beam, and a through hole capable of passing through the slider screw 823 can be provided on the first slider 821 of the main beam, enabling the first slider 821 of the main beam to slide along the slider screw 823.

[0113] In a specific embodiment, as Figure 4 shown, it further includes a connecting shaft support seat 825. The connecting shaft support seat 825 is fixed on the side of the first slider 821 of the main beam close to the fixator. One end of the connecting shaft 7 close to the first slider 821 of the main beam penetrates through the connecting shaft support seat 825, and the connecting shaft support seat 825 can prevent the end of the connecting shaft 7 close to the first slider 821 of the main beam from bending and deforming;

[0114] As Figure 5 shown, a clamping groove 8211 is provided on the side of the first slider 821 of the main beam close to the fixator. One side of the outer circumference of one end of the connecting shaft 7 close to the first slider 821 of the main beam is flattened to form a plane, as Figure 9As shown, the end of the connecting shaft 7 near one end of the first slider 821 of the main beam is placed in the card slot 8211 and the plane fits against the inner wall of the card slot, achieving accurate positioning of the connecting shaft 7 on the first slider 821 of the main beam.

[0115] In a specific embodiment, a scale structure is further included, such as Figure 2 As shown, the scale structure includes an arrow pointer 101 and a scale 102. The scale 102 is fixed on the side of the main beam 81 away from the connecting shaft 7, and the arrow pointer 101 is fixed on the second slider 822 of the main beam. The arrow pointer 101 points to the scale 102. When an operator operates the radial feed mechanism 83, it is confirmed whether the main beam slider mechanism 82 is adjusted in place by reading the scale 102 (the readings of the scale 102 correspond to pipes of different pipe diameters). The scale structure can help the operator conveniently and accurately adjust the grinding pipe diameter and grinding thickness.

[0116] In a specific embodiment, the radial feed mechanism 83 includes an adjustment screw 831 and an adjustment mechanism base;

[0117] The adjustment mechanism base is fixed to the bottom of the main beam 81, such as Figure 6 As shown, the adjustment mechanism base includes a base 832 and a cover plate 833. The base 832 and the cover plate 833 are fixedly connected and enclose an adjustment screw mounting hole 834 that allows the adjustment screw 831 to rotate along the axis of the adjustment screw 831;

[0118] One end of the adjustment screw 831 is provided with a thread, such as Figure 18 As shown, the other end of the adjustment screw is provided with a head 8311, and a limit stop 8312 is provided at one end of the adjustment screw near the head 8311. The limit stop 8312 and the head 8311 are respectively located at both ends of the adjustment screw mounting hole 834;

[0119] The end of the adjustment screw 831 with the thread is threadedly connected to the second slider 822 of the main beam.

[0120] In a specific embodiment, such as Figure 2 As shown, the main beam 81 is provided with a plurality of base mounting holes 812 for mounting the base 832 along the length direction. The base 832 can be mounted on the base mounting holes 812 at different positions, thereby increasing the adjustment range of the radial feed mechanism 83.

[0121] In a specific embodiment, such as Figure 7 and Figure 8 As shown, the limit structure includes a positioning pin shaft 73, an elastic plunger 74, and a plurality of limit portions arranged along the axial direction of the connecting shaft 7;

[0122] The limiting part includes a pin shaft hole 71 and a plunger hole 72 whose axes intersect. The intersection point of the axes of the pin shaft hole 71 and the plunger hole 72 is located on the axis of the connecting shaft 7. An elastic plunger 74 is arranged in the plunger hole 72, and the elastic plunger 74 is embedded in the plunger hole 72;

[0123] A circle of depressions is arranged in the middle of the positioning pin shaft 73. After the positioning pin shaft 73 is inserted into the pin shaft hole 71, the end of the elastic plunger 74 can be stuck in the depression;

[0124] By installing the positioning pin shaft 73 in the limiting parts at different positions, the depth of insertion of the connecting shaft 7 into the bottom fixing device is changed, thereby changing the position of the grinding wheel on the grinding machine in the axial direction of the pipe, and further changing the grinding depth of the pipe bevel;

[0125] In this embodiment, a spring is arranged inside the elastic plunger 74, and the spring abuts against a steel ball arranged at the end of the elastic plunger 74. When the positioning pin shaft 73 is inserted, the steel ball enters a circle of depressions arranged in the middle of the positioning pin shaft 73 to play a limiting role. When the positioning pin shaft 73 is pulled out forcefully, the steel ball slides out of the depression and no longer plays a limiting role.

[0126] In a specific embodiment, as Figure 18 shown, the grinding machine includes a motor 91 and a grinding wheel 92. The motor 91 drives the grinding wheel 92 to rotate. The grinding wheel 92 is conical, and the operator can change the grinding wheel 92 to grind bevels at different angles.

[0127] In a specific embodiment, a dust suction device is further included. As Figure 10 shown, the dust suction device includes a dust suction hood 1101 and a dust suction pipe 1102. The dust suction hood 1101 is fixed on the grinding frame by bolts. The opening of the dust suction hood 1101 is arranged relative to the grinding wheel of the grinding machine. The dust suction pipe 1102 is communicated with the dust suction hood 1101, and the dust suction pipe 1102 can be externally connected to a vacuum cleaner;

[0128] There is a lot of dust when grinding the pipe bevel, and at the same time, the chips generated during grinding are easy to splash, making the working conditions of the operator very bad. The cooperation of the dust suction device and the vacuum cleaner can effectively reduce the dust diffusion and block the chip splash, effectively improving the working conditions of the operator.

[0129] In a specific embodiment, as Figure 1 shown, the dust suction device further includes a hand-tightening bolt 1103 installed on the main beam 81 of the grinding frame. As Figure 10As shown, the dust suction hood 1101 is provided with a socket 1104. When it is necessary to replace the grinding wheel 92, the operator loosens the hand-tightening bolt 1103, removes the dust suction hood 1101 from the grinding frame through the socket 1104. After the grinding wheel 92 is replaced, the operator installs the dust suction hood 1101 onto the grinding frame through the socket 1104 and tightens the hand-tightening bolt 1103 to complete the fixation.

[0130] In a specific embodiment, as Figure 18 shown, handles 84 are fixed at both ends of the grinding frame, enabling the operator to hold the grinding frame by hand for convenient operation.

[0131] In a specific embodiment, the wedge mounting hole 11 is provided with a second inclined surface 112, which is arranged on the opposite side of the first inclined surface 111. The wedge 3 is provided with a wedge second inclined surface 32 that slidably cooperates with the second inclined surface 112.

[0132] The second inclined surface 112 and the wedge second inclined surface 32 make the sliding of the wedge 3 and the first positioning disk 1 smoother.

[0133] In a specific embodiment, the arc-shaped groove 12 gradually moves away from the center of the first positioning disk 1 from one end close to the wedge mounting hole 11 to the other end, making it easier for the outer periphery of the first positioning disk 1 to be deformed by force.

[0134] In a specific embodiment, as Figure 15 shown, the wedge first inclined surface 31 is a curved surface protruding towards the outside of the wedge 3.

[0135] In the initial state (before the screw 5 is screwed), the wedge first inclined surface 31 is in contact with the first inclined surface 111, and the thrust applied by the wedge 3 is perpendicular to the first inclined surface 111. As the screw 5 is tightened, the wedge 3 gradually displaces along the axial direction of the first positioning disk 1, the wedge 3 squeezes the deformable region, and the first inclined surface 111 gradually deviates from the plane where it is located in the initial state, resulting in the wedge 3 being unable to apply force to the deformable region well, and the thrust applied by the wedge 3 to the deformable region being uncontrollable.

[0136] In this embodiment, the first inclined surface 31 of the wedge block is designed as a curved surface, so that the first inclined surface 31 of the wedge block can always fit the first inclined surface 111. The angle between the thrust force applied by the wedge block 3 and the first inclined surface 111 remains unchanged all the time, so that the force applied by the wedge block 3 on the deformable area is always controllable, and the pressure angle between the deformation direction of the deformable area and the thrust direction applied by the wedge block 3 always remains within a small range. When the useful work done by the wedge block 3 is certain, the smaller the pressure angle, the smaller the force that the wedge block 3 needs to apply on the first positioning disk 1, the smaller the stress received by the deformable area, and the smaller the contact stress between the first inclined surface 31 of the wedge block and the first inclined surface 111. This effectively reduces the stress during the elastic deformation process of the deformable area of the first positioning disk 1, thereby increasing the service life of the first positioning disk 1.

[0137] In a specific embodiment, as Figure 12 shown, the wedge block mating part further includes a stress relief hole 13. The stress relief hole 13 is arranged at one end of the arc groove 12 away from the wedge block mounting hole 11, so that the stress can be released after the outer periphery of the first positioning disk 1 is deformed, and the service life of the first positioning disk 1 is increased.

[0138] In a specific embodiment, as Figure 11 shown, it further includes a connecting sleeve 4 on the same axis as the first positioning disk 1. As Figure 16 shown, flange plates 41 are provided at both ends of the connecting sleeve 4. The connecting sleeve 4 is fixedly connected to the first positioning disk 1 and the second positioning disk 2 respectively through the flange plates 41 at both ends.

[0139] In a specific embodiment, as Figure 13 and Figure 14 shown, first flange plate placement grooves 14 and second flange plate placement grooves 22 for placing the flange plates 41 at both ends of the connecting sleeve 4 are respectively provided on the opposite surfaces of the first positioning disk 1 and the second positioning disk 2. In this embodiment, the first flange plate placement grooves 14 and the second flange plate placement grooves 22 are in clearance fit with the flange plates 41, which is convenient for assembly and can ensure the position accuracy after assembly at the same time.

[0140] In a specific embodiment, as Figure 17 shown, it further includes a copper sleeve 6. The copper sleeve 6 penetrates through the second positioning disk 2 and is inserted into the inner hole of the connecting sleeve 4. The length of the inner hole of the copper sleeve 6 is less than the length of the inner hole of the connecting sleeve 4;

[0141] A copper sleeve flange plate 61 is provided at one end of the copper sleeve 6. The copper sleeve flange plate 61 is fixed on the end surface of the second positioning disk 2 away from the connecting sleeve 4;

[0142] Compared with the direct insertion of the connecting shaft 7 into the connecting sleeve 4 for rotation, after the copper sleeve 6 is provided, the processing personnel only need to finish machining the inner hole of the copper sleeve 6 to ensure the smooth rotation of the connecting shaft 7, reducing the workload of finishing machining the inner hole. At the same time, due to the reduction of the mating length, the contact area between the connecting shaft 7 and the inner hole is also correspondingly reduced, and the rotational friction received by the connecting shaft 7 during rotation is smaller, and the rotation is smoother.

[0143] In a specific embodiment, Figure 14 As shown, an observation hole 21 is provided on the second positioning disk 2, which is convenient for the operator to observe the internal situation.

[0144] During actual operation, as Figure 20 shown, after the operator inserts the first positioning disk 1 into the inner wall of the pipe A, the flange of the second positioning disk 2 is stuck at the end of the pipe A. The operator sequentially tightens the screw rod 5 in accordance with the principle of cross symmetry and step-by-step tightening until the first positioning disk 1 is tensioned inside the pipe A;

[0145] The operator loosens the slider screw rod 823 so that the main beam slider mechanism 82 can move along the main beam 81. Rotate the adjustment screw rod 831 to drive the movement of the main beam slider mechanism 82, so that the position of the grinding machine relative to the pipe in the radial direction of the pipe changes, that is, adjust the radial depth of cut of the grinding machine. After adjustment, tighten the slider screw rod 823 until the main beam slider mechanism 82 no longer moves along the main beam 81. The connecting shaft 7 is fixedly connected to the main beam 81 with the required radial depth of cut. If the grinding length of the groove to be ground in the axial direction of the pipe is large, the positioning pin shaft 73 and the elastic plunger 74 can be installed in the limiting part closer to the grinding frame;

[0146] Then the operator inserts the connecting shaft 7 into Figure 17 the through hole inside the tensioner shown, and the operator holds the grinding frame. The grinding machine on the grinding frame can grind the groove of the pipe axially and circumferentially by the axial sliding and circumferential rotation of the connecting shaft 7 in the hole of the copper sleeve 6;

[0147] Turn on the grinding machine to start grinding the groove of the pipe. The construction personnel first push the grinding frame along the axial direction of the pipe A, so that the conical grinding wheel 92 feeds axially along the pipe A and grinds until the limiting structure of the connecting shaft 7 is stuck at the end of the through hole for limiting, realizing axial depth of cut. Then hold the grinding frame and rotate it to start circumferential grinding. After grinding is completed, remove the grinding frame and take out the fixator to complete the entire disassembly work;

[0148] The operator first inserts the fixator (tensioner) into the pipe A, and then inserts the connecting shaft 7 into the fixator, so that during the adjustment of the fixator, the operator does not need to support the grinding frame, and the operation is more labor-saving.

[0149] Embodiment 2

[0150] This embodiment provides a device for grinding the bevel of pipe fittings. As Figure 18 shown, the working principle and main structure of this embodiment are the same as those of Embodiment 1. The differences between this embodiment and Embodiment 1 are as follows:

[0151] In Embodiment 1, the fixer is a tensioner, and the tensioner includes a first positioning disk 1, a second positioning disk 2, a wedge block 3, and a screw 5.

[0152] In this embodiment, the fixer includes a sleeve 1201. A flange is provided on the outer periphery of one end of the sleeve 1201. The fixer being the sleeve 1201 is applicable to pipes with relatively small inner diameter dimensional tolerances.

[0153] In this embodiment, the fixer further includes a copper sleeve 6. As Figure 19 shown, the copper sleeve 6 is inserted into the inner hole of the sleeve 1201, and the length of the inner hole of the copper sleeve 6 is less than the length of the inner hole of the sleeve 1201;

[0154] One end of the copper sleeve 6 is provided with a copper sleeve flange 61. The copper sleeve flange 61 is fixed on the end face of the end of the sleeve 1201 where the flange is provided. The function of the copper sleeve 6 is similar to that in Embodiment 1.

[0155] During actual operation, the operation process is similar to that in Embodiment 1. The difference is that since the fixer (sleeve 1201) does not need to be adjusted, the connecting shaft 7 can be inserted into the fixer in advance, and the operator can install the grinding frame and the fixer onto the pipe together, making the operation more convenient.

[0156] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for grinding the bevel of pipe fittings, characterized in that, Comprising: A fixator, a grinding frame, a grinding machine and a connecting shaft (7), the grinding machine includes a motor (91) and a grinding wheel (92), the motor (91) drives the grinding wheel (92) to rotate, and the grinding wheel (92) is conical; The grinding frame is arranged on one side of the fixator, and the grinding machine is installed on the top of the grinding frame; The fixator can be inserted into the interior of the pipe and fit against the inner wall of the pipe. A flange is provided on the outer periphery of one end of the fixator close to the grinding frame, and a through hole allowing the connecting shaft (7) to be inserted is axially provided in the fixator; One end of the connecting shaft (7) can be inserted into the through hole, the other end of the connecting shaft (7) is installed on the grinding frame, and a limiting structure is provided at the end of the connecting shaft (7) away from the grinding frame, and the limiting structure can be stuck at the end of the through hole close to the grinding frame; The connecting shaft (7) can rotate in the through hole and slide along the axial direction of the through hole, and the connecting shaft (7) can adjust its position vertically on the grinding frame; The grinding frame includes a main beam (81), a main beam slider mechanism (82) and a radial feed mechanism (83); The main beam (81) is arranged on one side of the fixator, and the grinding machine is fixed on the top of the main beam (81); One end of the connecting shaft (7) is fixed on the main beam slider mechanism (82); The main beam slider mechanism (82) is connected to the radial feed mechanism (83), and the main beam slider mechanism (82) can slide along the main beam (81); The radial feed mechanism (83) is arranged at the bottom of the main beam (81), and the radial feed mechanism (83) can drive the main beam slider mechanism (82) to reciprocate vertically.

2. The device for pipe fitting bevel grinding according to claim 1, wherein The fixator is a tensioner, and the tensioner includes a first positioning disk (1), a second positioning disk (2), a wedge block (3) and a screw (5); The first positioning disk (1) and the second positioning disk (2) are fixedly connected, and the first positioning disk (1) and the second positioning disk (2) are on the same axis; At least two wedge block mating parts arranged in a circular array around the axis of the first positioning disk (1) are provided on the first positioning disk (1), and a flange is provided on the outer periphery of one end of the second positioning disk (2) away from the first positioning disk (1); The wedge block mating part includes a wedge block mounting hole (11) and an arc-shaped groove (12), the concave direction of the arc-shaped groove (12) is away from the center of the first positioning disk (1), the wedge block mounting hole (11) is arranged at one end of the arc-shaped groove (12), a first inclined surface (111) is provided on one side of the wedge block mounting hole (11) close to the other end of the arc-shaped groove (12), and a notch (113) is provided on the side of the wedge block mounting hole (11) away from the center of the first positioning disk (1); The wedge block (3) is placed in the wedge block mounting hole (11), and a first wedge block inclined surface (31) slidably matched with the first inclined surface (111) is provided on the wedge block (3); One end of the screw (5) with a screw head penetrates through the second positioning disk (2), and the other end of the screw (5) is threadedly connected to the wedge block (3).

3. The device for pipe fitting bevel grinding according to claim 1, characterized in that, The fixator includes a sleeve (1201), and a flange is provided on the outer periphery of one end of the sleeve (1201).

4. A device for pipe fitting bevel grinding according to claim 1, characterized in that: The main beam slider mechanism (82) includes a first main beam slider (821), a second main beam slider (822), a slider screw (823) and a positioning shaft (824); The first main beam slider (821) is arranged on one side of the main beam (81) close to the fixture, the second main beam slider (822) is arranged on the side of the main beam (81) away from the fixture. The first main beam slider (821) is provided with a threaded hole for installing the slider screw (823), and the second main beam slider (822) is provided with a through hole through which the slider screw (823) can pass. The second main beam slider (822) can slide along the slider screw (823). The first main beam slider (821) and the second main beam slider (822) are connected by the slider screw (823), and the opposite surfaces of the first main beam slider (821) and the second main beam slider (822) abut against the main beam (81); The positioning shaft (824) is vertically fixed on the second main beam slider (822), and a positioning hole (8212) with a clearance fit with the positioning shaft (824) is provided on the first main beam slider (821).

5. The device for pipe fitting bevel grinding according to claim 4, characterized in that, It further includes a connecting shaft support seat (825). The connecting shaft support seat (825) is fixed on the side of the first main beam slider (821) close to the fixture, and one end of the connecting shaft (7) close to the first main beam slider (821) penetrates through the connecting shaft support seat (825); A clamping groove (8211) is provided on the side of the first main beam slider (821) close to the fixture. One side of the outer periphery of one end of the connecting shaft (7) close to the first main beam slider (821) is flattened to form a plane. The end of the connecting shaft (7) close to the first main beam slider (821) is placed in the clamping groove (8211) and the plane fits the inner wall of the clamping groove.

6. The device for pipe fitting bevel grinding according to claim 4, characterized in that, It further includes a scale structure. The scale structure includes an arrow pointer (101) and a scale (102). The scale (102) is fixed on the side of the main beam (81) away from the connecting shaft (7), and the arrow pointer (101) is fixed on the second main beam slider (822), and the arrow pointer (101) points to the scale (102).

7. The device for pipe fitting bevel grinding according to claim 4, characterized in that The radial feed mechanism (83) includes an adjustment screw (831) and an adjustment mechanism seat; The adjustment mechanism seat is fixed at the bottom of the main beam (81). The adjustment mechanism seat includes a base (832) and a cover plate (833). The base (832) and the cover plate (833) are fixedly connected to form an adjustment screw installation hole (834) allowing the adjustment screw (831) to rotate along the axis of the adjustment screw (831); One end of the adjustment screw (831) is provided with a thread, the other end of the adjustment screw is provided with a head (8311), and a limit stop (8312) is provided at one end of the adjustment screw close to the head (8311). The limit stop (8312) and the head (8311) are respectively located at both ends of the adjustment screw installation hole (834); One end of the adjustment screw (831) with a thread is threadedly connected to the second main beam slider (822).

8. The device for pipe fitting bevel grinding according to claim 1, characterized in that, The limiting structure includes a positioning pin shaft (73), an elastic plunger (74), and a plurality of limiting portions arranged axially along the connecting shaft (7); The limiting portion includes a pin shaft hole (71) and a plunger hole (72) whose axes intersect. The intersection point of the axes of the pin shaft hole (71) and the plunger hole (72) is located on the axis of the connecting shaft (7). An elastic plunger (74) is provided in the plunger hole (72), and the elastic plunger (74) is embedded in the plunger hole (72); A circle of depressions is provided in the middle of the positioning pin shaft (73). After the positioning pin shaft (73) is inserted into the pin shaft hole (71), the end of the elastic plunger (74) can be stuck in the depression.

9. The device for pipe fitting bevel grinding according to claim 1, characterized in that, It further includes a dust suction device; The dust suction device includes a dust suction hood (1101) and a dust suction pipe (1102). The dust suction hood (1101) is fixed to the grinding frame by bolts. The opening of the dust suction hood (1101) is arranged relative to the grinding wheel of the grinding machine. The dust suction pipe (1102) is communicated with the dust suction hood (1101), and the dust suction pipe (1102) can be externally connected to a vacuum cleaner.

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