Plastic pipe machining end grinding device

Abstract

The utility model relates to the technical field of plastic pipe machining, in particular to a plastic pipe machining end grinding device which comprises a workbench, a clamping mechanism and a grinding mechanism used for grinding the end of a pipe fitting, the clamping mechanism comprises a supporting strip fixed to the surface of the workbench and two sets of clamping assemblies, and a guide groove is formed in the supporting strip. Each clamping assembly comprises a supporting plate and a rotating roller which are arranged on the two sides of the supporting strip, a sliding groove is formed in the middle of each supporting plate, bearings are fixed to the two ends of each rotating roller, bearing seats are fixed to the outer sides of the bearings, the bearing seats are clamped in the sliding grooves, and the clamping device further comprises a pushing part enabling the bearing seats to slide in the sliding grooves. The two sets of rotating rollers, the supporting strips, the telescopic rods and the springs are arranged, so that the rotating rollers always keep the trend of moving downwards, and the problems that in the prior art, clamped pipe fittings cannot be suitable for various pipe diameters, and the clamping mode is unstable are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipe processing, in particular to a plastic pipe processing end grinding device. Background Art

[0002] PPR is the abbreviation of random copolymer polypropylene (Polypropylene-Random). It is commonly known as type III polypropylene. PPR pipe is an updated product of UPVC water supply pipe, aluminum-plastic pipe, PE pipe, PE-X pipe and PE-RT pipe. Because it uses random copolymerization technology, the strength and high temperature resistance of polypropylene are well guaranteed, thus becoming the main force of water pipe materials. PPR pipe adopts hot-melt connection during the connection process. At this time, the end of the PPR pipe needs to be polished and smoothed, foreign matter is cleaned, and then hot-melt is performed to ensure stable connection.

[0003] A Chinese patent (CN202222994440.6) discloses a plastic pipe cutting and grinding device, including a workbench, a fixed clamping plate, a movable clamping plate, a protective shell and a grinding device, wherein the upper end surface of the workbench is fixedly connected with a fixed clamping plate, a protective shell and a grinding device in sequence from left to right, the front and rear sides of the fixed clamping plate are fixedly connected with fixed blocks, the inner side of the fixed block is slidably connected with a guide column, the top end of the guide column is fixedly connected by a buffer sleeve, a fixed block and a movable clamping plate, and the bottom end of the guide column is fixedly connected with a foot pedal.

[0004] The above patent discloses the use of two splints to fix pipe fittings, and the pipe fittings are pressed by stepping on them. The splints are pressed down by clamping blocks, and the distance between the clamping blocks limits the diameter of the grindable pipe fittings. The splints are arc-shaped splints, and the pipe fittings have a small diameter and cannot limit the radial movement of the pipe fittings. The pipe fittings will shake during grinding, and the clamping method is by stepping on them. If the staff accidentally releases their feet, the splints will loosen, and the pipe fittings will jump under the drive of the grinding wheel, resulting in uneven end face grinding. Severe pipe fittings may even be lifted off the splints, causing accidental injuries to the staff. Utility Model Content

[0005] The utility model aims to provide a plastic pipe processing end grinding device to solve the problems that the clamping pipe fittings in the prior art cannot be applied to various pipe diameters and the clamping method is unstable.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a plastic pipe processing end grinding device, comprising a workbench, a clamping mechanism and a grinding mechanism for grinding the ends of pipe fittings, the clamping mechanism comprising a support bar fixed to the surface of the workbench and two groups of clamping assemblies, the support bar being provided with a guide groove, each group of the clamping assemblies comprising a support plate and a roller arranged on both sides of the support bar, a slide groove being provided in the middle of the support plate, bearings being fixed at both ends of the roller, a bearing seat being fixed on the outer side of the bearing, the bearing seat being clamped in the slide groove, and also comprising a pushing portion for causing the bearing seat to slide in the slide groove.

[0007] The working principle of this solution is: place the PPR tube to be polished on the support bar, push it inward, and push up the two rollers. The PPR tube is fixed on the support bar with the support of the two rollers until the end of the PPR tube is pressed against the polishing mechanism for polishing. During the polishing process, the PPR tube is moved horizontally by the rollers so that the PPR tube always fits on the grinding wheel. After polishing, the PPR tube can be directly pulled out and the above process is repeated to polish the next PPR tube.

[0008] Preferably, the pushing part includes a sleeve fixed on the support plate and a sliding rod fixed on the bearing seat, the sliding rod is inserted into the sleeve, and a spring is sleeved on the outer side of the sleeve and the sliding rod, the upper end of the spring is fixed to the support plate, and the lower end of the spring is fixed to the bearing seat.

[0009] Preferably, the grinding mechanism includes a support block fixed on the workbench, a rotating shaft is rotatably connected to the middle of the support block, a mounting plate is provided at one end of the rotating shaft close to the support bar, a grinding wheel is installed on the mounting plate, and the other end of the rotating shaft is connected to a motor.

[0010] Preferably, a dust cover is fixed to the outer side of the grinding wheel, and a notch is formed on the side of the dust cover close to the support bar.

[0011] Preferably, a rotating disk is fixed to the end of the roller close to the grinding wheel, and a rotating handle is fixed to the rotating disk.

[0012] Preferably, the middle part of the roller is recessed, and its axial cross-section is V-shaped as a clamping surface. The geometric center of the roller and the geometric center of the support bar are in the same vertical plane, and the roller is located directly above the support bar. The V-shaped opening angle of the clamping surface is greater than 90°, and the guide groove is V-shaped, and the opening angle is greater than 90°.

[0013] Compared with the known public technology, the technical solution provided by the utility model has the following beneficial effects:

[0014] 1. The utility model sets two groups of rollers, support bars, telescopic rods and springs so that the rollers always keep a downward movement trend, which is used to clamp the PPR pipe to prevent the PPR pipe from shaking during the grinding process, causing the wrong grinding position and uneven ports. Through the action of the spring and the telescopic rod, when placing the PPR pipe, it can be directly inserted from the end, and the contact between the PPR pipe and the roller will generate a vertical component force on the roller, so that the roller can be lifted up without manual operation, which is convenient for placing the pipe.

[0015] 2. The utility model provides a rotating disk and a rotating handle on one of the rollers to facilitate the operation of the rotating roller, and provides an anti-slip pad to increase the friction between the roller and the PPR pipe. When the roller is rotated, the PPR pipe can be driven to move horizontally, so that the end of the PPR pipe can always fit with the grinding wheel, thereby improving the grinding effect and efficiency.

[0016] 3. The utility model clamps the PPR pipe by designing a V-shaped structure, which can adapt to PPR pipes of various diameters. When grinding pipes of different diameters, there is no need to replace the clamp. The utility model can be used to grind PPR pipes of various diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 Schematic cross-sectional view;

[0019] Figure 3 For this utility model Figure 1 Schematic diagram of the middle AA section;

[0020] Figure 4 For this utility model Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0021] Figure 5 For this utility model Figure 3 A partial enlarged schematic diagram of point C in the middle.

[0022] In the figure: 1-workbench, 201-support bar, 202-guide groove, 203-support plate, 204-slide groove, 205-bearing seat, 206-bearing, 207-roller, 208-clamping surface, 209-anti-slip pad, 210-sleeve, 211-slide bar, 212-spring, 213-rotating disk, 214-rotating handle, 301-support block, 302-rotating shaft, 303-mounting disk, 304-grinding wheel, 305-motor, 401-dust cover, 402-notch. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model is further described below in conjunction with embodiments.

[0025] like Figure 1 - Figure 5 As shown, the utility model proposes a plastic pipe processing end grinding device, comprising a workbench 1, a clamping mechanism for clamping the PPR pipe is arranged on the left upper surface of the workbench 1, and a grinding mechanism for grinding the end of the PPR pipe is arranged on the right upper surface of the workbench 1.

[0026] The clamping mechanism includes a support bar 201 fixed on the surface of the workbench 1. A guide groove 202 is provided in the middle of the upper part of the support bar 201. The guide groove 202 is V-shaped with an opening angle greater than 90°. In this embodiment, the opening angle is 120°.

[0027] The left and right ends of the support bar 201 are respectively provided with clamping assemblies, and the two clamping assemblies include support plates 203 arranged on both sides of the support bar 201, and a vertical slide groove 204 is opened in the middle of each support plate 203, and a bearing seat 205 is clamped in each slide groove 204, and a bearing 206 is fixed in each bearing seat 205, and a roller 207 is fixedly installed in the two bearings 206, and the two bearings 206 are respectively fixed at the two ends of the roller 207, and the middle part of the roller 207 is concave, and its axial cross-section is a V-shaped cross-section as a clamping surface 208, and the geometric center of the roller 207 and the geometric center of the support bar 201 are in the same vertical plane, and the roller 207 is located directly above the support bar 201.

[0028] The V-shaped opening angle of the clamping surface 208 is greater than 90°, and is 120° in this embodiment. A rubber anti-slip pad 209 is bonded to the surface of the clamping surface 208 .

[0029] A pushing portion is provided between the bearing seat 205 and the top of the support plate 203 to keep the roller 207 moving downward. The pushing portion includes a sleeve 210 fixed on the support plate 203 and a slide bar 211 fixed on the bearing seat 205. The slide bar 211 is inserted into the sleeve 210 to form a telescopic rod. A spring 212 is sleeved on the outside of the sleeve 210 and the slide bar 211. The upper end of the spring 212 is fixed to the support plate 203, and the lower end is fixed to the bearing seat 205. The elasticity and gravity of the spring 212 are used to keep the bearing seat 205 moving downward all the time.

[0030] A rotating disk 213 is fixed to one end of the rotating roller 207 on the right side, and a rotating handle 214 is fixed to the rotating disk 213 . The rotating handle 214 can be used to operate the rotating roller 207 to rotate.

[0031] The grinding mechanism includes a support block 301 fixed on the workbench 1, a rotating shaft 302 is rotatably installed in the middle of the support block 301 through a bearing, a mounting plate 303 is provided at the left end of the rotating shaft 302, a grinding wheel 304 is installed on the mounting plate 303, and the other end of the rotating shaft 302 is connected to a motor 305 through a coupling, and the rotating shaft 302 is driven to rotate by the motor 305.

[0032] A box-type dust cover 401 is provided on the periphery of the grinding wheel 304 to prevent debris from flying when grinding the PPR pipe. The left side of the dust cover 401 is connected to the support block 301, and the right side is connected to the support plate 203. A notch 402 is provided on the right side of the dust cover 401 corresponding to the support bar 201, and the pipe fitting enters the dust cover 401 through the notch for grinding.

[0033] When the utility model is used, the motor 305 is started, the PPR tube to be polished is placed on the support bar 201, pushed inward, and the two rollers 207 are lifted upward. The PPR tube is fixed on the support bar 201 with the support of the two rollers 207 until the end of the PPR tube is pressed against the grinding wheel 304 for polishing. During the polishing process, the roller 207 is rotated by operating the rotating handle 214. There is an anti-slip pad 209 between the roller 207 and the PPR tube. Rotating the roller 207 can make the PPR tube move horizontally, so that the PPR tube is always attached to the grinding wheel 304. After polishing is completed, the PPR tube can be directly pulled out, and the above process is repeated to polish the next PPR tube.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. These modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plastic pipe end grinding device, characterized in that: The invention comprises a workbench (1), a clamping mechanism and a grinding mechanism for grinding the end of a pipe fitting, wherein the clamping mechanism comprises a support bar (201) fixed on the surface of the workbench (1) and two groups of clamping components, wherein the support bar (201) is provided with a guide groove (202), and each group of the clamping components comprises a support plate (203) and a roller (207) arranged on both sides of the support bar (201), a slide groove (204) is provided in the middle of the support plate (203), bearings (206) are fixed at both ends of the roller (207), a bearing seat (205) is fixed on the outer side of the bearing (206), the bearing seat (205) is clamped in the slide groove (204), and further comprises a pushing portion for making the bearing seat (205) slide in the slide groove (204).

2. The plastic pipe end grinding device according to claim 1, characterized in that: The pushing part comprises a sleeve (210) fixed on the support plate (203) and a slide rod (211) fixed on the bearing seat (205); the slide rod (211) is inserted into the sleeve (210); a spring (212) is sleeved on the outer sides of the sleeve (210) and the slide rod (211); the upper end of the spring (212) is fixed to the support plate (203), and the lower end of the spring (212) is fixed to the bearing seat (205).

3. The plastic pipe processing end grinding device according to claim 1 or 2, characterized in that: The grinding mechanism comprises a support block (301) fixed on a workbench (1); a rotating shaft (302) is rotatably connected to the middle of the support block (301); a mounting plate (303) is provided at one end of the rotating shaft (302) close to the supporting bar (201); a grinding wheel (304) is mounted on the mounting plate (303); and a motor (305) is connected to the other end of the rotating shaft (302).

4. The plastic pipe end grinding device according to claim 3, characterized in that: A dust cover (401) is fixed to the outer side of the grinding wheel (304), and a notch (402) is formed on a side of the dust cover (401) close to the support bar (201).

5. The plastic pipe end grinding device according to claim 4, characterized in that: A rotating disk (213) is fixed to the end of the rotating roller (207) on one side close to the grinding wheel (304), and a rotating handle (214) is fixed to the rotating disk (213).

6. The plastic pipe end grinding device according to claim 1, characterized in that: The middle part of the rotating roller (207) is concave, and its axial cross-section is V-shaped as a clamping surface (208). The geometric center of the rotating roller (207) and the geometric center of the support bar (201) are in the same vertical plane, and the rotating roller (207) is located directly above the support bar (201). An anti-slip pad (209) is fixed on the clamping surface (208). The V-shaped opening angle of the clamping surface (208) is greater than 90°. The guide groove (202) is V-shaped, and the opening angle is greater than 90°.

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