Dismounting tool for PVC (polyvinyl chloride) sleeve of split screw of aluminum die

Abstract

The utility model belongs to the technical field of dismantling of PVC (polyvinyl chloride) sleeves of split screws, and particularly relates to a dismantling tool for PVC sleeves of split screws of an aluminum die. Comprising a cutter bar, a cutter and an insertion rod, the cutter bar is a pipe body, n cutters are connected to the cutter bar, n is an integer larger than or equal to 2, and the n cutters are evenly distributed around the cutter bar by a circle in the same plane. The cutting knife comprises a knife holder and a knife head; through grooves are formed in the pipe wall of the cutter bar, the cutter holders are nested in the through grooves in a one-to-one correspondence mode, the cutter holders can slide in the through grooves in the width direction of the cutter bar, anti-falling limiting positions are arranged on the cutter holders inside and outside the through grooves, and the cutter heads are fixed to the cutter holders and located outside the through grooves. The inserting rod is inserted into the cutter bar and can move in the length direction of the cutter bar, and an ejector head is arranged at the end, extending into the cutter bar, of the inserting rod and used for pushing the n cutters out; the cutter bar is connected with a handle; when the aluminum die opposite-pull screw PVC sleeve dismantling tool is used for operation, the whole dismantling work can be operated by one person, operation is convenient and fast, time and labor are saved, and labor input is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of dismantling a pair of tension screw PVC casings, and in particular relates to a dismantling tool for a pair of tension screw PVC casings of an aluminum mold. Background Art

[0002] Aluminum formwork is divided into a pull-tab system and a screw system. When the screw system is constructed, the wall column formwork is reinforced with tension screws. After the concrete is poured, the tension screws cannot be removed. In order to reuse the tension screws and reduce construction costs, PVC sleeves are usually installed outside the tension screws. After the construction is completed, the tension screws can be removed. After the wall column formwork is removed, the PVC sleeve remains in the main body. The PVC sleeve left in the main body is difficult to remove. Because the inner wall of the PVC sleeve is smooth, it is difficult for the sealing material to be combined with it as a whole, which easily forms a water seepage path and causes leakage of the exterior wall.

[0003] Traditional construction methods are mostly to use an electric pick to break the end of the plastic casing, and then seal it with mortar. It is necessary to connect the power supply and use an electric pick to break it. The construction speed is slow and the damage to the concrete surface is large. In addition, due to the different heights of the screws left on the main body, it is difficult for workers to carry out the construction. There are also methods of using a blowtorch to burn a small part of the outer side of the casing, which has a certain impact on the concrete surface. Utility Model Content

[0004] The utility model aims to provide a tool for removing the tensioning screw rod casing which has the advantages of simple structure, convenient operation, fast speed and good effect.

[0005] The utility model provides the following technical scheme: an aluminum mold tension screw PVC casing removal tool, comprising a knife bar, a cutting knife and an inserting rod; the knife bar is a tube body, and n cutting knives are connected to the knife bar, n is an integer ≥ 2, and the n cutting knives are evenly distributed around the knife bar in the same plane; the cutting knife comprises a knife seat and a knife head; a through groove is opened on the tube wall of the knife bar, and the knife seats are nested in the through groove one by one, and the knife seats can slide along the width direction of the knife bar in the through groove, and the knife seat is provided with anti-slip limiters inside and outside the through groove, and the knife head is fixed on the knife seat and located outside the through groove; the inserting rod is inserted in the knife bar, and the inserting rod can move along the length direction of the knife bar, and a head is provided at one end of the inserting rod extending into the knife bar, and the head is used to push out the n cutting knives; a handle is connected to the knife bar.

[0006] Furthermore, the insert rod is engraved with an external thread, the knife rod is engraved with an internal thread, the insert rod and the knife rod are screwed together, and a handle is provided at the end of the insert rod exposed relative to the knife rod.

[0007] Furthermore, a limiting sleeve is fixed on the knife rod, and the limiting sleeve includes a sleeve and a retaining ring. The sleeve is coaxial with the knife rod, and the retaining ring is fixed on the top of the sleeve. The sleeve can be inserted into the PVC sleeve, and the width of the retaining ring is greater than the outer diameter of the PVC sleeve.

[0008] Furthermore, a slidable hammer head is sleeved on the knife rod between the limiting sleeve and the handle, and a hammer handle is connected to the hammer head.

[0009] Furthermore, the tool holder includes a rectangular block, the four side surfaces of which are respectively parallel to the edges of the through groove on the tool holder, the inner facade of which is an arc surface that fits with the top of the insertion rod; the top edge of the rectangular block is chamfered, and the bottom edge of the top is chamfered.

[0010] Furthermore, four cutting knives are connected to the knife bar.

[0011] Furthermore, the cutter head of the cutting knife has an arc-shaped blade, and the cross section of the blade is an isosceles triangle.

[0012] Furthermore, the left and right sides of the inner facade of the rectangular block are provided with overhanging edges, which serve as inner anti-slip limiters, and the left and right sides of the outer facade of the rectangular block are provided with overhanging blocks, which serve as outer anti-slip limiters.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] The entire PVC casing cutting and removal process does not use brute force. When the top of the plug rod is separated from the cutting knife, the cutting knife can be retracted into the knife rod. With the help of the threaded matching relationship between the plug rod and the knife rod, the rotation of the plug rod is converted into axial movement. The top head pushes out the cutting knife, and the knife head penetrates into the PVC casing. The knife rod is rotated to complete the cutting of the PVC casing. After the PVC casing is cut off, the hammer head slides back and forth, the hammer head hits the handle, and the knife head supports the cut PVC casing to continuously pull out the cut PVC casing.

[0015] The entire demolition work can be performed by one person, which is convenient to operate, saves time and effort, and reduces labor investment.

[0016] Reduce the damage to the concrete surface layer of the wall around the PVC sleeve, and do not damage the tension screw holes and the wall.

[0017] The device has a simple structure and small size, making it more convenient to carry. Carrying this tool for high-altitude work is highly safe. When operating this tool, the movement amplitude is small and the movement is gentle, and the risk of accidental falling is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the aluminum mold tension screw PVC casing removal tool;

[0019] Figure 2 is a schematic diagram of the insertion rod;

[0020] Figure 3 This is a cross-sectional view of the aluminum mold tension screw PVC casing removal tool;

[0021] Figure 4It is a schematic diagram of the cooperation between the cutting knife and the knife rod;

[0022] Figure 5 This is a schematic diagram of the use of the aluminum mold tension screw PVC casing removal tool.

[0023] In the figure: 1- knife bar; 2- cutting knife; 2.1- knife seat; 2.2- knife head; 2.3- inner anti-drop limit; 2.4- outer anti-drop limit; 3- plug rod; 3.1- top head; 4- handle; 5- grip; 6- limit sleeve; 6.1- sleeve; 6.2- retaining ring; 7- hammer head; 8- hammer handle; 9- PVC sleeve. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown: an aluminum mold tension screw PVC casing removal tool, comprising a knife bar 1, a cutter 2 and an insert rod 3; the knife bar 1 is a round tube, and n cutters 2 are connected to the knife bar 1, n is an integer ≥ 2, in this embodiment, 4 cutters 2 are connected to the knife bar 1; the 4 cutters 2 are evenly distributed around the knife bar 1 in the same plane; the cutter 2 includes a knife seat 2.1 and a knife head 2.2; a through groove is opened on the tube wall of the knife bar 1, and the knife seat 2.1 is inserted one by one The knife seat 2.1 is sleeved in the through groove and can slide along the width direction of the knife rod 1 in the through groove. The knife seat 2.1 is provided with anti-slip limiters inside and outside the through groove. The knife head 2.2 is fixed on the knife seat 2.1 and is located outside the through groove. The insertion rod 3 is inserted in the knife rod 1 and can move along the length direction of the knife rod 1. The end of the insertion rod 3 extending into the knife rod 1 is provided with a head 3.1, and the head 3.1 is used to push out n cutting knives 2. The knife rod 1 is connected with a handle 4.

[0026] The plug rod 3 is engraved with an external thread, and the knife rod 1 is engraved with an internal thread. The plug rod 3 is screwed together with the knife rod 1. A handle 5 is provided at the end of the plug rod 3 exposed relative to the knife rod 1. One hand holds the handle 4, and the other hand holds the handle 5. Then the plug rod 3 is rotated, and the plug rod 3 moves axially along the knife rod 1. The top head 3.1 moves toward the cutting knife 2. The top head 3.1 pushes the cutting knife 2 out, and the knife head 2.2 pierces the PVC casing.

[0027] A limiting sleeve 6 is fixed on the knife bar 1, and the limiting sleeve 6 includes a sleeve 6.1 and a retaining ring 6.2. The sleeve 6.1 is coaxial with the knife bar 1, and the retaining ring 6.2 is fixed on the top of the sleeve 6.1. The sleeve 6.1 can be inserted into the PVC sleeve, and the width of the retaining ring 6.2 is greater than the outer diameter of the PVC sleeve. The sleeve 6.1 is inserted into the PVC sleeve to prevent the aluminum mold pulling screw from swinging when the PVC sleeve removal tool is used, and the retaining ring 6.2 stops at the PVC sleeve to limit the cutting depth of the PVC sleeve.

[0028] A slidable hammer head 7 is sleeved between the limit sleeve 6 and the handle 4 on the knife rod 1, and a hammer handle 8 is connected to the hammer head 7. The hammer handle 8 is held and the hammer head 7 is slid back and forth. When the hammer head 7 hits the handle 4, the potential energy of the sudden stop gives the PVC sleeve an outward force.

[0029] The tool holder 2.1 comprises a rectangular block, the four sides of which are parallel to the edges of the through slot on the tool holder 2.1, and the inner surface of the rectangular block is an arc surface that matches the top head 3.1 of the insertion rod 3; the top edge of the rectangular block is chamfered, and the bottom edge of the top head 3.1 is chamfered.

[0030] The blade head 2.2 of the cutting knife 2 has an arc-shaped blade, the cross section of which is an isosceles triangle, and both ends of the arc-shaped blade are gently sloped, which is conducive to cutting the PVC sleeve when the knife rod 1 rotates.

[0031] The left and right sides of the inner facade of the rectangular block are provided with overhanging edges, which serve as inner anti-slip limiters 2.3, and the left and right sides of the outer facade of the rectangular block are provided with overhanging blocks, which serve as outer anti-slip limiters 2.4.

[0032] like Figure 5 As shown: when the aluminum mold tension screw PVC casing removal tool enters the PVC casing, the top 3.1 of the insertion rod 3 is separated from the cutter 2. At this stage, the cutter 2 is not subjected to thrust and the cutter 2 can be retracted into the knife rod 1; until the sleeve 6.1 of the limit sleeve 6 is inserted into the PVC casing and the retaining ring 6.2 stops at the pipe mouth of the PVC casing; hold the handle 4 with one hand and the handle 5 with the other hand, rotate the insertion rod 3, and the insertion rod 3 is screwed into the knife rod 1 until the top 3.1 pushes the cutter 2 out. , the cutter head 2.2 is inserted into the PVC sleeve, and then the cutter rod 1 is rotated one circle, the cutter head 2.2 cuts the PVC sleeve, the cutter head 2.2 holds the cut PVC sleeve, and the hammer handle 8 is held to slide the hammer head 7 back and forth. When the hammer head 7 hits the handle 4, the potential energy of the emergency stop gives the PVC sleeve an outward force. After the PVC sleeve is pulled out, the insertion rod 3 is rotated in the opposite direction, the top head 3.1 is separated from the cutting knife 2, and the cutting knife 2 can be retracted into the cutter rod 1 again, and the PVC sleeve is removed from the cutter rod 1.

[0033] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A PVC casing removal tool with an aluminum mold tension screw, characterized by: The invention comprises a knife bar (1), a cutting knife (2) and an inserting rod (3); the knife bar (1) is a tube body, and n cutting knives (2) are connected to the knife bar (1), where n is an integer ≥ 2, and the n cutting knives (2) are evenly distributed around the knife bar (1) in the same plane; the cutting knife (2) comprises a knife seat (2.1) and a knife head (2.2); a through groove is opened on the tube wall of the knife bar (1), and the knife seats (2.1) are nested in the through groove one by one, and the knife seats (2.1) can be arranged along the knife bar (1) in the through groove. ), the knife seat (2.1) is provided with anti-dropping limiters both inside and outside the through slot, the knife head (2.2) is fixed on the knife seat (2.1) and is located outside the through slot; the insertion rod (3) is inserted into the knife rod (1), the insertion rod (3) can move along the length direction of the knife rod (1), and one end of the insertion rod (3) extending into the knife rod (1) is provided with a head (3.1), and the head (3.1) is used to push out n cutting knives (2); the knife rod (1) is connected with a handle (4).

2. The aluminum mold tension screw PVC casing removal tool according to claim 1, characterized in that: The insert rod (3) is engraved with an external thread, the knife rod (1) is engraved with an internal thread, the insert rod (3) and the knife rod (1) are threadedly screwed together, and a handle (5) is provided at the end of the insert rod (3) exposed relative to the knife rod (1).

3. The aluminum mold tension screw PVC casing removal tool according to claim 2, characterized in that: A limiting sleeve (6) is fixed on the knife rod (1), and the limiting sleeve (6) comprises a sleeve (6.1) and a retaining ring (6.2). The sleeve (6.1) is coaxial with the knife rod (1), and the retaining ring (6.2) is fixed on the top of the sleeve (6.1). The sleeve (6.1) can be inserted into a PVC sleeve, and the width of the retaining ring (6.2) is greater than the outer diameter of the PVC sleeve.

4. The aluminum mold tension screw PVC casing removal tool according to claim 3 is characterized by: A slidable hammer head (7) is sleeved between the limiting sleeve (6) and the handle (4) on the knife rod (1), and a hammer handle (8) is connected to the hammer head (7).

5. The aluminum mold tension screw PVC casing removal tool according to any one of claims 1 to 4, characterized in that: The knife seat (2.1) comprises a rectangular block, the four side surfaces of which are respectively parallel to the edges of the through slot on the knife seat (2.1), the inner vertical surface of which is an arc surface that matches the top head (3.1) of the insertion rod (3); the top edge of the rectangular block is chamfered, and the bottom edge of the top head (3.1) is chamfered.

6. The aluminum mold tension screw PVC casing removal tool according to claim 1, characterized in that: Four cutting knives (2) are connected to the knife rod (1).

7. The aluminum mold tension screw PVC casing removal tool according to claim 5, characterized in that: The blade head (2.2) of the cutting knife (2) has an arc-shaped blade, and the cross section of the blade is an isosceles triangle.

8. The aluminum mold tension screw PVC casing removal tool according to claim 5, characterized in that: The left and right sides of the inner facade of the rectangular block are provided with overhanging edges, which serve as inner anti-slip limiters (2.3), and the left and right sides of the outer facade of the rectangular block are provided with overhanging blocks, which serve as outer anti-slip limiters (2.4).

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