Large-diameter electric clamping and pressing tool

Abstract

The invention relates to the field of hydraulic tongs, in particular to electric hydraulic tongs. A large-diameter electric clamping and pressing tool comprises an electric hydraulic clamp and a clamping and pressing clamp, a clamp head of the electric hydraulic clamp comprises an upper clamp body and a lower clamp body, the clamping and pressing clamp comprises a first movable section, a second movable section and a fixed section, clamping and pressing plates are detachably connected to the inner side of the first movable section, the inner side of the second movable section and the inner side of the fixed section, and the cross section of each clamping and pressing plate is in a circular arc shape. A plurality of block-shaped protrusions used for clamping and pressing pipe fittings are arranged on the clamping and pressing plate, and the block-shaped protrusions are evenly distributed on the inner side face of the clamping and pressing plate. The clamping and pressing device is simple in structure and convenient to use, clamping and pressing connection of the pipes can be conveniently achieved through cooperative work of the electric hydraulic clamp and the clamping and pressing clamp, the clamping and pressing device can be suitable for clamping and pressing connection of the pipes with different diameters by replacing clamping and pressing plates with different sizes in the clamping and pressing clamp, replacement is convenient and fast, adaptability is wide, the clamping and pressing connection effect between the pipes is guaranteed, and practicability is high. And the clamping and pressing device can also be used for clamping and pressing connection of large-diameter pipes of DN125 to DN400.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic pliers, in particular to electric hydraulic pliers. Background Art

[0002] Electric hydraulic pliers are commonly used in the crimping connection of thin-walled pipes. The upper and lower pliers of the pliers are both provided with crimping grooves for crimping pipe fittings. During the process of crimping and connecting pipes, the operator inserts the pipe to be connected into the pipe fitting, places the pipe fitting between the crimping grooves of the upper and lower pliers in the pliers, and drives the upper and lower pliers to press together through the hydraulic drive structure, exerting pressure on the pipe fitting to deform it, thereby clamping the pipe fitting on the pipe, and forming a seal through the sealing ring to achieve the connection between the pipes. However, the electric hydraulic pliers currently used for crimping and connecting pipes are There are defects such as small application range, high cost of replacing or repairing the clamp head, and poor connection effect. Especially for large-diameter pipes above DN125, the current electric hydraulic pliers have poor adaptability and it is difficult to achieve a better connection effect. Because the structure of the clamp head and the crimping groove is fixed, the size of the connectable pipe is greatly restricted during the pipe crimping connection process. If the electric hydraulic pliers are used to crimp and connect pipes that exceed the applicable size range, the connection effect of the pipe will be affected, which may easily cause problems such as unstable pipe connection and poor sealing.

[0003] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0004] The purpose of the present invention is to provide a large-caliber electric pressing tool to solve at least one of the above-mentioned technical problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A large-caliber electric crimping tool, comprising an electric hydraulic pliers and a crimping fixture, wherein the pliers head of the electric hydraulic pliers comprises an upper pliers body and a lower pliers body, and wherein the crimping fixture comprises a first movable segment, a second movable segment and a fixed segment, wherein the cross sections of the first movable segment, the second movable segment and the fixed segment are all arc-shaped, wherein a first pressing portion is provided at the front side of the first movable segment, wherein the rear side of the first movable segment is rotatably connected to the upper side of the fixed segment, wherein a second pressing portion is provided at the front side of the second movable segment, wherein the rear side of the second movable segment is rotatably connected to the lower side of the fixed segment;

[0007] The upper pliers body is provided with a first insertion groove for inserting the first pressing part, and the lower pliers body is provided with a second insertion groove for inserting the second pressing part;

[0008] The inner sides of the first movable section, the second movable section and the fixed section are all detachably connected with a clamping plate, the cross-section of the clamping plate is arc-shaped, and the clamping plate is provided with a plurality of block-shaped protrusions for clamping pipe fittings, and the plurality of block-shaped protrusions are evenly arranged on the inner side surface of the clamping plate.

[0009] The first pressing part and the second pressing part are both in a rectangular shape, and anti-slip patterns are provided on the upper surface of the first pressing part, the upper side wall of the first insertion groove, the lower surface of the second pressing part and the lower side wall of the first insertion groove.

[0010] The cross section of the block-shaped protrusion is rectangular.

[0011] The width of the block-shaped protrusion is the same as the width of the clamping plate.

[0012] The block-shaped protrusion and the clamping plate adopt an integrated structure.

[0013] Arc-shaped fixing sheets are arranged on the inner sides of the first movable section, the second movable section and the fixing section, and the clamping plate is connected to the fixing sheet by bolts.

[0014] There are two fixing plates, which are arranged in an upper and lower position. The fixing plates are provided with arc-shaped strip-shaped through holes, and the strip-shaped through holes are used as first bolt holes.

[0015] Both upper and lower sides of the clamping plate are provided with flanges, and the flanges are provided with second bolt holes.

[0016] The flange is provided with three second bolt holes, and the three second bolt holes are respectively arranged in the middle and two end portions of the flange.

[0017] The clamping plate is provided with a vertically arranged reinforcing rib, the front portion of the reinforcing rib is connected to the clamping plate, and the rear portion of the reinforcing rib abuts against the front portion of the fixing plate.

[0018] Through this design, the present invention provides a large-caliber electric crimping tool with a simple structure and easy use. Through the cooperation of the electric hydraulic pliers and the crimping fixture, the pipe can be easily crimped and connected. By replacing the crimping plates of different sizes in the crimping fixture, it can be suitable for the crimping connection of pipes of different diameters. The replacement is convenient and the adaptability is wide to ensure the crimping connection effect between the pipes. It can also be used for the crimping connection of large-caliber pipes, such as the crimping connection of large-caliber pipes such as DN125, DN150, DN200, DN250, DN300, DN350, and DN400. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial structural schematic diagram of the present invention;

[0020] Figure 2 It is a partial structural schematic diagram of the clamping fixture of the present invention;

[0021] Figure 3 It is a partial structural schematic diagram of the fixing plate of the present invention;

[0022] Figure 4 It is a partial structural cross-sectional schematic diagram of the clamping fixture of the present invention;

[0023] Figure 5 It is a partial structural cross-sectional schematic diagram of the clamping plate of the present invention.

[0024] In the figure: 1. electric hydraulic pliers; 2. upper pliers body; 3. lower pliers body; 4. first movable section; 5. second movable section; 6. fixed section; 7. clamping plate; 8. block-shaped protrusion; 9. fixing plate; 10. first bolt hole; 11. flange; 12. reinforcing rib. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] like Figures 1 to 5 As shown, a large-caliber electric crimping tool comprises an electric hydraulic pliers 1 and a crimping fixture, the pliers head of the electric hydraulic pliers 1 comprises an upper pliers body 2 and a lower pliers body 3, the crimping fixture comprises a first movable segment 4, a second movable segment 5 and a fixed segment 6, the cross sections of the first movable segment 4, the second movable segment 5 and the fixed segment 6 are all arc-shaped, a first pressing portion is provided on the front side of the first movable segment 4, the rear side of the first movable segment 4 is rotatably connected to the upper side of the fixed segment 6, a second pressing portion is provided on the front side of the second movable segment 5, and the first pressing portion is provided on the front side of the second movable segment 5. The rear side portions of the two movable sections 5 are rotatably connected to the lower side portions of the fixed section 6; the upper pliers body 2 is provided with a first insertion groove for inserting the first pressing portion, and the lower pliers body 3 is provided with a second insertion groove for inserting the second pressing portion; the inner sides of the first movable section 4, the second movable section 5 and the fixed section 6 are all detachably connected with a clamping plate 7, the cross-section of the clamping plate 7 is arc-shaped, and the clamping plate 7 is provided with a plurality of block-shaped protrusions 8 for clamping pipe fittings, and the plurality of block-shaped protrusions 8 are evenly arranged on the inner side surface of the clamping plate 7. Through this design, the present invention provides a large-caliber electric crimping tool with a simple structure and easy use. Through the cooperation of the electric hydraulic pliers and the crimping fixture, the pipe can be easily crimped and connected. By replacing the crimping plates of different sizes in the crimping fixture, it can be suitable for the crimping connection of pipes of different diameters. The replacement is convenient and the adaptability is wide to ensure the crimping connection effect between the pipes. It can also be used for the crimping connection of large-caliber pipes, such as the crimping connection of large-caliber pipes such as DN125, DN150, DN200, DN250, DN300, DN350, and DN400.

[0027] When this design is in use, the first movable section 4, the second movable section 5 and the inner side of the fixed section 6 of the crimping clamp are surrounded by a circular through hole. After the operator inserts the pipe to be connected into the pipe fitting, the pipe fitting is passed through the circular through hole on the inner side of the crimping clamp, and the first pressing part and the second pressing part on the front side of the crimping clamp are respectively located in the first insertion groove on the upper clamp body 2 and the second insertion groove on the lower clamp body 3 of the electric hydraulic pliers 1. The upper and lower clamp bodies 3 are pressed together by the hydraulic drive structure of the electric hydraulic pliers 1, and pressure is applied to the first pressing part and the second pressing part to make them fit tightly, thereby driving the pressing plate 7 on the inner side of the first movable section 4, the second movable section 5 and the fixed section 6 to press the pipe fitting and deform the pipe fitting with the help of the block-shaped protrusion 8 on the pressing plate 7, so that the pipe fitting is clamped on the pipe, and the crimping connection between the pipes is completed.

[0028] The rear side of the first movable section 4 is rotationally connected to the upper side of the fixed section 6 via the first rotating shaft, and the rear side of the second movable section 5 is rotationally connected to the lower side of the fixed section 6 via the second rotating shaft, so as to realize the rotational connection between the first movable section 4 and the fixed section 6, and the second movable section 5 and the fixed section 6, and facilitate the insertion of the pipe and the pipe fitting into the circular through hole surrounded by the first movable section 4, the second movable section 5 and the fixed section 6 during the clamping connection process of the pipe.

[0029] The first pressing part and the second pressing part are both in the shape of a cuboid, and the upper surface of the first pressing part, the upper side wall of the first insertion groove, the lower surface of the second pressing part and the lower side wall of the first insertion groove are all provided with anti-skid patterns, so as to increase the friction between the first pressing part and the first insertion groove or between the second pressing part and the second insertion groove through the anti-skid patterns, and ensure the pressing effect of the upper clamp body 2 and the lower clamp body 3 on the first pressing part and the second pressing part during the clamping connection process of the pipe. In order to ensure the use effect of the anti-skid patterns, the anti-skid patterns can adopt a plurality of strip-shaped protrusions arranged in a staggered manner.

[0030] The cross section of the block-shaped protrusion 8 is rectangular, and the width of the block-shaped protrusion 8 is the same as the width of the clamping plate 7, so as to ensure the deformation effect of the pipe when it is clamped by means of the block-shaped protrusion 8, thereby ensuring the connection strength of the pipe after being clamped. In order to ensure the structural strength of the clamping plate 7, the block-shaped protrusion 8 and the clamping plate 7 adopt an integrated structure.

[0031] The first movable section 4, the second movable section 5 and the fixed section 6 are all provided with arc-shaped fixing pieces 9 on their inner sides, and the clamping plate 7 and the fixing pieces 9 are connected by bolts, so that the clamping plate 7 can be detachably connected by means of the bolts. Figure 4 and 5As shown, there are two fixing plates 9, which are arranged in an upper and lower arrangement. The fixing plates 9 are provided with arc-shaped strip-shaped through holes, which are used as first bolt holes 10; flanges 11 are provided on both upper and lower sides of the clamping plate 7, and second bolt holes are provided on the flanges 11, and the clamping plate 7 is fixed to the fixing plates 9 by passing bolts through the first bolt holes 10 and the second bolt holes. In order to facilitate the installation of the clamping plate 7, the lower surface of the flange 11 located on the upper side of the clamping plate 7 is in close contact with the upper surface of the upper fixing plate 9 of the two fixing plates 9, and the upper surface of the flange 11 located on the lower side of the clamping plate 7 is in close contact with the lower surface of the lower fixing plate 9 of the two fixing plates 9.

[0032] The flange 11 is provided with three second bolt holes, which are respectively arranged at the middle and both ends of the flange 11, so that the bolts respectively inserted into different positions of the flange 11 of the clamping plate 7 form a better support effect on the clamping plate 7, thereby ensuring the clamping plate 7 has a pressure-deformation effect on the pipe. The clamping plate 7 is provided with a vertically arranged reinforcing rib 12, the upper part of the reinforcing rib 12 is connected to the flange 11 on the upper side of the clamping plate 7, the lower part of the reinforcing rib 12 is connected to the flange 11 on the lower side of the clamping plate 7, the front part of the reinforcing rib 12 is connected to the clamping plate 7, and the rear part of the reinforcing rib 12 is against the front part of the fixing plate 9, so as to ensure the structural strength of the clamping plate 7 with the help of the reinforcing rib 12, further ensure the pressure-deformation effect of the clamping plate 7 on the pipe, and facilitate the operator to replace the clamping plate 7, and can use the reinforcing rib 12 to determine the installation position of the clamping plate 7.

[0033] The fixing plate 9 on the first movable segment 4 is integrated with the first movable segment 4, the fixing plate 9 on the second movable segment 5 is integrated with the second movable segment 5, and the fixing plate 9 on the fixed segment 6 is integrated with the fixed segment 6 to ensure the structural strength between the fixing plate 9 and the first movable segment 4, the second movable segment 5 or the fixed segment 6, so that the clamping plate 7 can be firmly installed on the fixing plate 9.

[0034] The clamping plate in the present invention is detachably connected to the first movable section, the second movable section or the fixed section, which can facilitate operators to select clamping plates of different sizes according to the diameter requirements of the pipe to be connected and install them in the clamping clamp, and then use electric hydraulic pliers to press the clamp to achieve the clamping connection of the pipe. In this process, clamping plates of different widths can be selected according to the diameter of the pipe to be connected, and the length of the block protrusions on the clamping plate and the spacing between two adjacent block protrusions are also determined according to the diameter of the pipe to be connected. The deformation effect of the pipe fitting when the clamping plate is pressing the pipe fitting can be guaranteed, thereby firmly connecting the pipe fitting and the pipe, thereby ensuring the connection effect between the pipes.

[0035] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A large-caliber electric crimping tool, comprising an electric hydraulic pliers and a crimping fixture, wherein the pliers head of the electric hydraulic pliers comprises an upper pliers body and a lower pliers body, characterized in that: The clamping fixture comprises a first movable section, a second movable section and a fixed section, the cross sections of the first movable section, the second movable section and the fixed section are all arc-shaped, a first pressing portion is provided on the front side of the first movable section, a rear side of the first movable section is rotatably connected to the upper side of the fixed section, a second pressing portion is provided on the front side of the second movable section, and a rear side of the second movable section is rotatably connected to the lower side of the fixed section; The upper pliers body is provided with a first insertion groove for inserting the first pressing part, and the lower pliers body is provided with a second insertion groove for inserting the second pressing part; The inner sides of the first movable section, the second movable section and the fixed section are all detachably connected with a clamping plate, the cross-section of the clamping plate is arc-shaped, and the clamping plate is provided with a plurality of block-shaped protrusions for clamping pipe fittings, and the plurality of block-shaped protrusions are evenly arranged on the inner side surface of the clamping plate.

2. A large-caliber electric crimping tool as claimed in claim 1, characterized in that: The first pressing part and the second pressing part are both in a rectangular shape, and anti-slip patterns are provided on the upper surface of the first pressing part, the upper side wall of the first insertion groove, the lower surface of the second pressing part and the lower side wall of the first insertion groove.

3. A large-caliber electric pressing tool as claimed in claim 1, characterized in that: The cross section of the block-shaped protrusion is rectangular.

4. A large-caliber electric pressing tool as claimed in claim 1 or 3, characterized in that: The width of the block-shaped protrusion is the same as the width of the clamping plate.

5. A large-caliber electric pressing tool as claimed in claim 1 or 3, characterized in that: The block-shaped protrusion and the clamping plate adopt an integrated structure.

6. A large-caliber electric crimping tool as claimed in claim 1, characterized in that: Arc-shaped fixing sheets are arranged on the inner sides of the first movable section, the second movable section and the fixing section, and the clamping plate is connected to the fixing sheet by bolts.

7. A large-caliber electric pressing tool as claimed in claim 6, characterized in that: There are two fixing plates, which are arranged in an upper and lower position. The fixing plates are provided with arc-shaped strip-shaped through holes, and the strip-shaped through holes are used as first bolt holes. Both upper and lower sides of the clamping plate are provided with flanges, and the flanges are provided with second bolt holes.

8. A large-caliber electric pressing tool as claimed in claim 7, characterized in that: The flange is provided with three second bolt holes, and the three second bolt holes are respectively arranged in the middle and two end portions of the flange.

9. A large-caliber electric pressing tool as claimed in claim 7, characterized in that: The clamping plate is provided with a vertically arranged reinforcing rib, the front portion of the reinforcing rib is connected to the clamping plate, and the rear portion of the reinforcing rib abuts against the front portion of the fixing plate.

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