Compression pipe connection tool

Abstract

The present invention belongs to the technical field of pipeline connection tools, and specifically relates to a crimping type pipeline connection tool. It includes a driving part, a caliper, a first crimping die, and a second crimping die. One of the first crimping die and the second crimping die is installed on the caliper to work. The first crimping die has a pair of symmetrically arranged crimping ring arms, and the pair of crimping ring arms enclose a first crimping hole. The second crimping die contains two movable dies arranged on both sides of a fixed die, and the fixed die and the movable die group enclose a second crimping hole. Spherical grooves are provided on the crimping ring arms and the movable die, and the caliper has a spherical matching part that matches the spherical groove. Since the first crimping die and the second crimping die of the present invention are installed on the caliper to work, the user can select an appropriate crimping die to perform crimping work according to the size of the target object that actually needs to be crimped when using it, and only the crimping die needs to be replaced when replacing, which is very convenient and quick.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline connection tools, and in particular relates to a compression type pipeline connection tool. Background Art

[0002] The compression pipe connection tool can also be called a pipe crimping tool, which is mainly used to press two pipes together. For example, the applicant disclosed an electric crimping tool in the prior patent application CN116810725A, which includes a working mechanism and a driving mechanism. The working mechanism includes a crimping head for acting on the target crimping object, and the crimping head is provided with a crimping die for clamping on the outside of the target crimping object (such as a pipe). Under the action of the driving mechanism, the crimping ends of the crimping head gradually close together, thereby crimping the target crimping object.

[0003] Although the above-mentioned crimping tool can realize the crimping of the pipe, its application scenarios are limited because the crimping head is directly arranged on the driving mechanism. Specifically, when this crimping tool is working, the body of the driving mechanism is arranged vertically with the pipe, so it is only suitable for open occasions. If the pipe is arranged in some narrow or complex areas, such as narrow pipe wells, or the pipe network on the top of the building, as well as in occasions such as pipe maintenance and connection, it is not suitable to use this crimping tool.

[0004] In addition, in actual work, it is easy to encounter scenarios where pipes of different sizes need to be crimped. Existing crimping tools can usually only adapt to one crimping head, resulting in the need to carry multiple tools when encountering situations where pipes of multiple different sizes need to be crimped, which is inconvenient. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a crimping type pipe connection tool in which a caliper can rotate relative to a crimping die, and is equipped with different crimping dies to be suitable for a variety of different pipe crimping scenarios.

[0006] The present invention adopts the following technical solutions:

[0007] A crimping pipe connection tool has the following characteristics: it is used for crimping targets with different sizes, and includes a driving part; a caliper, which is installed on the driving part and opens and closes under the drive of the driving part; a first crimping die, which acts on the first crimping target; and a second crimping die, which acts on the second crimping target; wherein the first crimping die and the second crimping die are selectively installed on the caliper to work, the first crimping die has a pair of symmetrically arranged crimping ring arms, and the pair of crimping ring arms enclose a first crimping hole for the first crimping target to pass through, the second crimping die has: a fixed die, a movable die group, including two movable dies symmetrically arranged on both sides of the fixed die, a second crimping hole for the second crimping target to pass through is enclosed between the fixed die and the movable die group, spherical grooves are opened on the crimping ring arms and the movable die, and the caliper has a spherical matching part that matches the spherical groove; the aperture of the first crimping hole is less than or equal to the aperture of the second crimping hole.

[0008] The clamping pipe connection tool proposed in the present invention also has such a feature, wherein the caliper includes: a pair of caliper arms, symmetrically arranged, having working ends, on which the spherical fitting portion is arranged; a pair of connecting plates, used to connect the middle parts of the pair of caliper arms together, and the caliper arms rotate relative to the connecting plates; and a pair of connecting pins, used to connect the caliper arms to the connecting plates; the edge of the spherical groove is provided with a first avoidance groove and convex portions located on both sides of the first avoidance groove, and a second avoidance groove for avoiding the convex portion is opened on one side of the spherical fitting portion, and the bottom of the first avoidance groove is inclined.

[0009] The compression-type pipe connection tool proposed in the present invention also has the following characteristics: the movable mold comprises: a movable mold pressing seat, one end of which is rotatably connected to the fixed mold, the other end of which is provided with the spherical groove, and the inner side of which is provided with an arc-shaped guide groove; a movable mold pressing petal, which is movably arranged on the inner side of the movable mold pressing seat and is formed with an arc-shaped guide sliding block that matches the arc-shaped guide sliding block, and the arc-shaped guide sliding block is also provided with a limiting notch along the arc direction; a blocking member, which is inserted into the end of the movable mold pressing seat away from the fixed mold and axially penetrates the arc-shaped guide sliding block and is used to block one end of the arc-shaped guide sliding block; a limiting member, which is inserted into the movable mold pressing seat and axially penetrates the limiting notch; a first elastic member, which is installed in the limiting notch; and a first steel ball, one end of which is abutted on the first elastic member and the other end of which is abutted on the limiting member; wherein the arc length of the arc-shaped guide sliding block is smaller than the arc length of the arc-shaped guide sliding block.

[0010] The compression-type pipe connection tool proposed in the present invention also has the following characteristics: the movable mold pressing seat and the movable mold pressing petal are provided with corresponding inspection markings; the bottom of the arc-shaped guide groove protrudes to one side to form a limiting groove, and the outer end of the arc-shaped guide sliding block protrudes to one side to form a limiting convex edge embedded in the limiting groove.

[0011] The compression-type pipe connection tool proposed in the present invention also has the following feature: the fixed mold includes an integrally arranged fixed mold pressure seat and a fixed mold pressure flap, the movable mold pressure flap is provided with a first notch at one end close to the fixed mold pressure flap, and a first sewage storage tank is formed between the first notch and the end of the fixed mold pressure flap.

[0012] The clamping type pipe connection tool proposed in the present invention also has such a feature that the two ends of the fixed mold press seat are respectively rotatably connected to a movable mold press seat, and a mounting hole is provided on the movable mold press seat on one side facing the fixed mold press seat, and an auxiliary mold closing structure is provided in the mounting hole. The auxiliary mold closing structure comprises: a push rod spring, one end of which extends into the mounting hole, and a push rod is nested in the other end of the push rod spring and has a top head protruding from the push rod spring in the radial direction, and the top head is pressed on the fixed mold press seat.

[0013] The compression-type pipe connection tool proposed in the present invention also has such a feature that a pair of plug plates are respectively formed at both ends of the fixed pressure die, and a pair of slots for inserting the plug plates are respectively opened on one side of the movable mold seat facing the fixed mold seat at both ends of the fixed pressure die, and the auxiliary clamping structure is installed in one of the slots, and the auxiliary clamping structures located at both ends of the fixed mold seat are staggered.

[0014] The compression pipe connection tool proposed in the present invention also has the following characteristics: a spherical mounting groove and an inclined mounting groove are respectively provided on opposite sides of the middle part of the pair of clamp arms, a second steel ball is provided between the two oppositely arranged spherical mounting grooves, and a spring is provided between the two oppositely arranged inclined mounting grooves.

[0015] The compression pipe connection tool proposed in the present invention also has such a feature that a driving end is formed at one end of the clamp arm away from the working end, and the two driving ends have a separated state and a closed state, and the driving part includes: a main body, a pair of rollers, which are movably arranged on the main body and act on the driving ends of the pair of clamp arms to cause the two driving ends to separate from each other, and a mounting seat for mounting the clamp, and when the driving end is in the closed state, the outer side of the driving end protrudes from the outer periphery of the mounting seat.

[0016] The crimping type pipe connection tool proposed in the present invention also has such a feature that the first crimping die also has: a hinge pin for rotating and connecting one end of the pair of crimping ring arms together, a torsion spring sleeved on the hinge pin, respectively acting on the pair of crimping ring arms, the crimping ring arm having a hinged end, a rotating plate for plugging the pair of crimping ring arms together is provided on the hinged end, a limiting convex edge for limiting the rotation angle is protruded outwardly on the rotating plate, a second notch is provided in the middle of the pair of crimping ring arms corresponding to one side of the first crimping hole, and a second ash storage trough is formed between the two second notches.

[0017] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0018] According to the crimping pipe connection tool of the present invention, since it is provided with a first crimping die and a second crimping die, one of the first crimping die and the second crimping die can be installed on the caliper to work, so that when using it, the user can select an appropriate crimping die for crimping according to the size of the target object that actually needs to be crimped, and when replacing, only the crimping die needs to be replaced, which is very convenient and quick. In addition, a spherical groove is provided on the pressing ring arm of the first crimping die and the movable die of the second crimping die, and the caliper has a spherical matching part that matches the spherical groove, so that the caliper and the first crimping die or the second crimping die adopt a spherical contact match when connected. When working, the caliper can be rotated with the first crimping die or the second crimping die to form more construction angles to adapt to different working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the schematic diagrams of the state when the second crimping die is used to crimp the second crimping target according to an embodiment of the present invention.

[0020] Figure 2 It is a schematic diagram of the state when the first crimping die is used to crimp the first crimping target according to an embodiment of the present invention.

[0021] Figure 3 This is the second schematic diagram of the state when the second crimping die is used to crimp the second crimping target according to the embodiment of the present invention.

[0022] Figure 4 Schematic diagram of the structure of the caliper in the embodiment of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the caliper after the front connecting plate is hidden in the embodiment of the present invention.

[0024] Figure 6 It is a partial structural exploded view of the caliper in an embodiment of the present invention.

[0025] Figure 7 It is a side view of the caliper installed on the mounting seat of the driving part in the embodiment of the present invention.

[0026] Figure 8 It is a front view of the caliper installed on the mounting seat of the driving part in the embodiment of the present invention.

[0027] Fig. 9 It is a schematic structural diagram of the first crimping die in an embodiment of the present invention.

[0028] Fig.10 4 is a top view of the first crimping die in the embodiment of the present invention.

[0029] Fig.11 It is a structural exploded view of the first crimping die in an embodiment of the present invention.

[0030] Fig.12 It is a schematic diagram of the state when the second crimping die and the caliper are matched in an embodiment of the present invention.

[0031] Fig.13 It is a schematic structural diagram of the second crimping die in an embodiment of the present invention.

[0032] Fig.14 2 is a side view of the second crimping die in the embodiment of the present invention.

[0033] Fig.15 yes Fig.14 Cross-section view along AA direction.

[0034] Fig.16 yes Fig.14 Cross-section along BB direction.

[0035] Fig.17 yes Fig.16 Cross-section view along CC direction.

[0036] Fig.18 It is an exploded view of the connection structure between the fixed die and the movable die of the second crimping die in an embodiment of the present invention.

[0037] Reference numerals:

[0038] A first crimping target 11; a second crimping target 12;

[0039] Driving unit 2; main body 21; roller 22; mounting seat 23; "I"-shaped mounting groove 231; connecting member 24;

[0040] Caliper 3; left caliper arm 31; left force applying portion 311; right caliper arm 32; right force applying portion 321; spherical mounting groove 322; inclined mounting groove 323; front connecting plate 33; front mounting hole 331; rear connecting plate 34; rear mounting hole 341; left connecting pin 35; right connecting pin 36; spherical matching portion 37; convex edge portion 371; second air-avoiding groove 372; second steel ball 38; spring 39;

[0041] The first crimping die 4; the left crimping ring arm 41; the left turning plate 411; the left limiting convex edge 412; the left plug 413; the right crimping ring arm 42; the right turning plate 421; the right limiting convex edge 422; the right plug 423; the first crimping hole 43; the hinge pin 44; the torsion spring 45; the second notch 46; the second ash storage tank 47; the crimping spherical groove 48; the crimping ring avoiding groove 481; the first convex portion 482; the first avoiding groove 483;

[0042] The second crimping die 5; the fixed die 51; the fixed die pressing seat 511; the fixed die pressing flap 512; the insert plate 513; the movable die 52; the movable die pressing seat 521; the arc-shaped guide slide groove 5211; the limiting groove 5212; the mounting hole 5213; the movable die pressing flap 522; the arc-shaped guide slider 5221; the limiting notch 5222; the first notch 5224; the blocking member 523; the limiting member 524; the first elastic member 525; the first steel ball 526; the slot 527; the second crimping hole 53; the ring die spherical groove 54; the ring die avoiding groove 541; the second convex part 542; the second avoiding groove 543; the inspection mark 55; the first dirt storage tank 56; the ejector spring 571; the ejector 572; the positioning pin 591; the limiting protrusion 592. DETAILED DESCRIPTION

[0043] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the compression type pipe connecting tool of the present invention is specifically described below in conjunction with embodiments and drawings.

[0044] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of the embodiments of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented, so they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0045] At the same time, the terms such as "left", "right", "front" and "back" cited in the embodiments of this specification are only for the convenience of description and are not used to limit the scope of the invention. Changes or adjustments to their relative relationships should be regarded as the scope of the invention without substantially changing the technical content.

[0046] It should also be noted that when an element is referred to as being “fixed to,” “disposed on,” or “connected to” another element, it may be directly on the other element or an intermediate element may exist at the same time.

[0047] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0048] <Example>

[0049] like Figure 1-Figure 3 As shown, this embodiment proposes a crimping type pipe connection tool for crimping crimping targets with different sizes. Taking the first crimping target 11 and the second crimping target 12 as an example, the first crimping target 11 and the second crimping target 12 are both circular pipes, wherein the first crimping target is a small diameter pipe, and its outer diameter is usually less than 30 mm, and the second crimping target is a large diameter pipe, and its outer diameter is usually more than 30 mm. The crimping type pipe connection tool includes a driving part 2, a caliper 3, a first crimping die 4 and a second crimping die 5. The caliper 3 is mounted on the driving part 2 and opens and closes under the drive of the driving part 2. The first crimping die 4 and the second crimping die 5 are detachably connected to the caliper 3, respectively, and the first crimping die 4 and the second crimping die 5 are used selectively. Among them, as Figure 2 As shown, the first crimping die 4 is used to act on the first crimping target 11 to perform crimping work on the first crimping target 11, such as Figure 1 As shown, the second crimping die 5 is used to act on the second crimping target 12 to crimp the second crimping target 12, that is, when crimping a certain pipe, the first crimping die 4 and the second crimping die 5 are used selectively. For example, when the crimping target is a small-diameter pipe, the first crimping die 4 is selected, and when the crimping target is a large-diameter pipe, the second crimping die 5 is selected, so that the user can use the tool in scenarios where the crimping targets have different sizes.

[0050] When the first crimping die 4 or the second crimping die 5 is connected to the caliper 3, a spherical connection structure is adopted, that is, a spherical groove (the spherical groove includes a hemispherical groove) is provided on the first crimping die 4 or the second crimping die 5, and the spherical groove includes a pressed spherical groove 48 provided on the first crimping die 4 and a ring die spherical groove 54 provided on the second crimping die 5, and a spherical matching part matching with the spherical groove is provided on the caliper 3, so that the caliper 3 and the first crimping die 4 / the second crimping die 5 can rotate, as shown in FIG. Figure 3 As shown, the relative position between the caliper 3 and the second crimping die 5 can be determined by Figure 1 The parallel position is rotated to Figure 3 The almost vertical position of the driving portion 2 can achieve that the driving portion 2 is nearly parallel to the second crimping target, making it convenient for users to work in a narrow environment.

[0051] In order to make the spherical matching part and the spherical groove better match, the edge of the spherical groove is provided with a first avoidance groove, convex parts located on both sides of the first avoidance groove, and an avoidance groove located opposite to the first avoidance groove, and a second avoidance groove for avoiding the convex part is opened on one side of the spherical matching part. Among them, the first avoidance groove includes a pressure ring avoidance groove 481 opened on the first crimping die 4 and a ring die avoidance groove 541 opened on the second crimping die 5; the convex part includes a first convex part 482 provided on the first crimping die 4 and a second convex part 542 provided on the second crimping die 5; the avoidance groove includes a first avoidance groove 483 provided on the first crimping die 4 and a second avoidance groove 543 provided on the second crimping die 5.

[0052] like Figure 4-Figure 6 As shown, the caliper 3 includes a pair of caliper arms (left caliper arm 31 and right caliper arm 32), a pair of connecting plates (front connecting plate 33 and rear connecting plate 34) and a pair of connecting pins (left connecting pin 35 and right connecting pin 36). The left caliper arm 31 and the right caliper arm 32 are symmetrically arranged, each having a working end and a driving end, and the working end is provided with a spherical matching portion 37 (in this embodiment, the spherical matching portion 37 is a hemispherical protrusion integrally formed on the working end) at a relative position, which is used to cooperate with the first crimping die 4 and the second crimping die 5. The front connecting plate 33 and the rear connecting plate 34 are respectively placed on the front and rear sides of the pair of caliper arms, and are used to connect the middle parts of the pair of caliper arms together. A through hole is opened in the middle of the left clamp arm 31 and the right clamp arm 32, and a pair of through holes are also opened at corresponding positions of the front connecting plate 33 and the rear connecting plate 34. The left connecting pin 35 and the right connecting pin 36 pass through the through holes on the front connecting plate 33, the left clamp arm 31 (the right clamp arm 32) and the rear connecting plate 34 in sequence to connect the front connecting plate 33, the rear connecting plate 34, the left clamp arm 31 and the right clamp arm 32 together. At the same time, the front and rear sides of the left connecting pin 35 and the right connecting pin 36 are provided with retaining springs to prevent their axial movement.

[0053] The left clamp arm 31 and the right clamp arm 32 can also rotate relative to the front connecting plate 33 and the rear connecting plate 34 by means of the left connecting pin 35 and the right connecting pin 36 respectively. The driving unit 2 includes a main body 21, a pair of rollers 22 acting on the left clamp arm 31 and the right clamp arm 32 respectively, and a mounting seat 23. Figure 7 As shown, the mounting seat 23 is installed at the front end of the main body 21, and a "I"-shaped mounting groove 231 is opened in the middle. A pair of rollers 22 are movably arranged in the mounting seat 23 and can be moved under the drive of the driving mechanism in the main body 21. The front connecting plate 33 and the rear connecting plate 34 of the caliper 3 are respectively provided with a front mounting hole 331 and a rear mounting hole 341. The caliper 3 is detachably installed in the "I"-shaped mounting groove 231 through the connecting member 24 passing through the front mounting hole 331 and the rear mounting hole 341. The pair of rollers 22 act on the inner sides of the driving ends of the left caliper arm 31 and the right caliper arm 32 respectively. When the rollers 22 move upward, the two driving ends can be separated from each other.

[0054] like Figure 6 As shown, a spherical mounting groove 322 and an inclined mounting groove 323 are respectively provided on opposite sides of the middle of the left clamp arm 31 and the right clamp arm 32, a second steel ball 38 is provided between the two oppositely arranged spherical mounting grooves, and a spring 39 is provided between the two oppositely arranged inclined mounting grooves. The provision of the second steel ball 38 can ensure that the left clamp arm 31 and the right clamp arm 32 are kept synchronous when opening and closing, and the force is more uniform. The spring 39 can assist the left clamp arm 31 and the right clamp arm 32 to open and close.

[0055] The movement state of the caliper 3 is as follows: when the user squeezes the force-applying ends of the left and right arms 31 and 32 with his hands, the driving ends of the left and right arms 31 and 32 approach each other to form a closed state, and the working ends of the two gradually separate; when the driving part 2 pushes outward from the inner side of the driving ends of the left and right arms 31 and 32 to form a separated state, the working ends of the two gradually approach.

[0056] like Figure 4-Figure 6 As shown in FIG. 1 , the driving ends of the left clamp arm 31 and the right clamp arm 32 protrude outward to form a left force-applying portion 311 and a right force-applying portion 321, respectively. When the driving ends are in a closed state, as shown in FIG. Figure 8 As shown, the left force-applying portion 311 and the right force-applying portion 321 both protrude from the outer periphery of the mounting seat 23. When installing the caliper 3, the user generally directly holds the left force-applying portion 311 and the right force-applying portion 321 with fingers, presses the driving end inward to form a closed state, and sets the left force-applying portion 311 and the right force-applying portion 321 to protrude from the mounting seat 23, so as to prevent the user's fingers from following the driving end into the "I"-shaped mounting groove 231, thereby protecting the user's hands and preventing the hands from being stuck or injured due to mis-starting.

[0057] like Figure 9-11 As shown, the first crimping die 4 is a two-petal crimping ring, having a pair of symmetrically arranged crimping ring arms (a left crimping ring arm 41 and a right crimping ring arm 42), one end of the left crimping ring arm 41 and the right crimping ring arm 42 are connected to each other, and the other end is separated, and a first crimping hole 43 for the first crimping target 11 to pass through is formed between the pair of crimping ring arms. The first crimping die 4 also has a hinge pin 44 and a torsion spring 45, the hinge pin 44 is used to rotatably connect one end of the left crimping ring arm 41 and the right crimping ring arm 42 together, the torsion spring 45 is sleeved on the hinge pin 44, and the two ends are respectively hooked on the connecting ends of the left crimping ring arm 41 and the right crimping ring arm 42.

[0058] Specifically, the upper end connection of the left pressure ring arm 41 and the right pressure ring arm 42 forms a left hinge end and a right hinge end respectively, and the left hinge end and the right hinge end are respectively provided with a left turn plate 411 and a right turn plate 421 for plugging the left pressure ring arm 41 and the right pressure ring arm 42 together, and the left turn plate 411 and the right turn plate 421 have two pieces arranged front and back, and a left socket 413 is formed between the two left turn plates 411 for inserting one of the right turn plates 421, and a right socket 423 is formed between the two right turn plates 421 for inserting one of the left turn plates 411. The hinge pin 44 passes through the four turn plates in sequence, and the end is limited to move radially by a retaining spring, so that the left hinge end and the right hinge end are rotatably connected together. The torsion spring 45 is sleeved on the hinge pin 44 and is located between the left turning plate 411 and the right turning plate 421. The two ends of the torsion spring 45 are respectively hooked on the left hinge end and the right hinge end to assist the separation and closing between the left pressure ring arm 41 and the right pressure ring arm 42.

[0059] In order to limit the rotation angle between the left pressure ring arm 41 and the right pressure ring arm 42, among the two left turning plates 411, the left turning plate 411 inserted into the socket between the two right turning plates 421 has a left limit convex edge 412 protruding outwardly for limiting the rotation angle; among the two right turning plates 421, the right turning plate 421 inserted into the socket between the two left turning plates 411 has a right limit convex edge 422 protruding outwardly for limiting the rotation angle; during the rotation process, the left limit convex edge 412 and the right limit convex edge 422 can be respectively abutted against the inner walls of the two sockets, thereby limiting the rotation angle of the left pressure ring arm 41 and the right pressure ring arm 42.

[0060] like Fig. 9 As shown, the outer sides of the separated ends of the left pressure ring arm 41 and the right pressure ring arm 42 are respectively formed with a pressure ring spherical groove 48, which matches with the spherical matching part 37 of the caliper 3, and the edges of the pressure ring spherical groove 48 are provided with a pressure ring avoidance groove 481 and first convex parts 482 located on both sides of the pressure ring avoidance groove 481. Figure 5-Figure 8 As shown, the side of the spherical fitting portion 37 has a convex edge portion 371 slightly protruding from the spherical fitting portion 37, and corresponding to the first convex portion 482, the inner side of the spherical fitting portion 37 (the side facing the caliper 3 body) is provided with a second escape groove 372 for avoiding the first convex portion 482. Specifically, as Fig. 9As shown, the bottom of the pressure ring avoidance groove 481 is inclined, and gradually lowered from the direction of the pressure ring spherical groove 48 toward the side, which can increase the contact area with the side of the spherical matching part 37. The first convex part 482 is higher than the bottom of the pressure ring avoidance groove 481, which can ensure the stability of the spherical matching part 37 in the pressure ring spherical groove 48, and avoid falling out of the pressure ring spherical groove 48 during the rotation. The pressure ring spherical groove 48 is also concave on one side of the main body of the left pressure ring arm 41 and the right pressure ring arm 42 to form a first avoidance groove 483, which is arranged opposite to the pressure ring avoidance groove 481 and is used to avoid the convex edge part 371 on the outside of the spherical matching part 37. When the spherical matching part 37 is matched with the pressure ring spherical groove 48, the spherical matching part 37 can rotate smoothly.

[0061] In addition, if Fig. 9 and Fig.11 As shown, the middle parts of the left pressing ring arm 41 and the right pressing ring arm 42 are on opposite sides of the two, and are located on one side of the first crimping hole 43 (the position between the first crimping hole 43 and the hinged end), respectively, and a second notch 46 is correspondingly provided, and a second ash storage tank 47 is formed between the two second notches 46 during the closing process. Since the working scene of pipe crimping is usually at the construction site, the pipe is easily contaminated with dust and impurities. During the crimping process, the dust and impurities on the pipe can enter the second ash storage tank 47 along the edge of the first crimping hole 43, and then fall off during the opening process of the left pressing ring arm 41 and the right pressing ring arm 42 after the subsequent crimping is completed, thereby avoiding the accumulation of dust and impurities in the first crimping hole 43 to affect the pipe crimping effect.

[0062] The second crimping die 5 is a multi-mode petal-type ring die, which has a fixed die 51 and at least one movable die set, each movable die set having two movable dies 52 symmetrically arranged on both sides of the fixed die 51. In this embodiment, a set of movable die sets is mainly used as an example for detailed description. Figure 12-Figure 18 As shown, two movable molds 52 are respectively placed on the left and right sides of the fixed mold 51, and a second crimping hole 53 for the second crimping target 12 to pass through is formed between the two movable molds 52 and the fixed mold 51. The ends of the two movable molds 52 away from the fixed mold 51 are provided with a ring mold spherical groove 54 for matching with the spherical matching part 37 on the caliper 3. Since the first crimping mold 4 corresponds to a small-sized crimping target and the second crimping mold 5 corresponds to a large-sized crimping target, the aperture of the first crimping hole 43 is less than or equal to the aperture of the second crimping hole 53. In actual situations, the movable mold group can also be provided with two or more groups, each group of movable mold groups is connected end to end, the first group of movable mold groups is connected to the fixed mold 51, and the last group of movable mold groups is provided with the ring mold spherical groove 54.

[0063] The size and surrounding structure of the ring die spherical groove 54 are the same as those of the first crimping die 4, that is, the ring die spherical groove 54 is matched with the spherical matching portion 37 of the caliper 3, and a ring die avoidance groove 541 and second convex portions 542 located on both sides of the ring die avoidance groove 541 are provided on the edge of the ring die spherical groove 54. Figure 5-Figure 8 As shown, the side of the spherical fitting portion 37 has a convex edge portion 371 slightly protruding from the spherical fitting portion 37, and corresponding to the second protrusion 542, the inner side of the spherical fitting portion 37 (the side facing the caliper 3 body) is provided with a second escape groove 372 for avoiding the second protrusion 542. Specifically, as Fig.13 As shown, the bottom of the ring die avoidance groove 541 is inclined, and gradually decreases from the direction of the ring die spherical groove 54 to the side, which can increase the contact area with the side of the spherical matching part 37. The second convex part 542 is higher than the bottom of the ring die avoidance groove 541, which can ensure the stability of the spherical matching part 37 in the ring die spherical groove 54 and avoid falling out of the ring die spherical groove 54 during rotation. The side of the ring die spherical groove 54 close to the main part of the movable mold 52 is also concave to form a second avoidance groove 543, which is arranged opposite to the ring die avoidance groove 541 and is used to avoid the convex edge part 371 on the outside of the spherical matching part 37. When the spherical matching part 37 is matched with the ring die spherical groove 54, the spherical matching part 37 can rotate smoothly.

[0064] The movable mold 52 comprises a movable mold pressing seat 521, a movable mold pressing flap 522, a blocking member 523, a limiting member 524, a first elastic member 525 and a first steel ball 526. The movable mold pressing flap 522 is movably arranged on the side of the movable mold pressing seat 521 facing the second crimping hole 53. Specifically, the movable mold pressing seat 521 is in an arc shape as a whole, one end of which is rotatably connected to the fixed mold 51, and the other end is provided with a ring mold spherical groove 54, and the inner side (the side facing the second crimping hole 53) is provided with an arc guide groove 5211. The side of the movable mold pressing flap 522 facing the movable mold pressing seat 521 is protrudingly formed with an arc guide slider 5221 that matches the arc guide groove 5211. The arc guide slider 5221 is inserted in the arc guide groove 5211 and can slide along the arc guide groove 5211.

[0065] The arc length of the arc-shaped guide slider 5221 is smaller than the arc length of the arc-shaped guide groove 5211, so that a vacant position is formed between the lower part of the arc-shaped guide groove 5211 and the lower end of the arc-shaped guide slider 5221, and the blocking member 523 is inserted at the end of the movable mold pressing seat 521 away from the fixed mold 51, and the blocking member 523 is arranged axially through the arc-shaped guide groove 5211, that is, the blocking member 523 is located in the vacant position, and is used to block one end of the arc-shaped guide slider 5221 to prevent the arc-shaped guide slider 5221 from falling out during the sliding process.

[0066] The arc-shaped guide slider 5221 is also provided with a limiting notch 5222 along the arc direction, and the first elastic member 525 is a spring, and the spring and the first steel ball 526 are arranged in the limiting notch 5222; the limiting member 523 is inserted into the movable mold pressing seat 521 and penetrates the limiting notch 5222 along the axial direction, and one end of the first steel ball 526 is abutted against the first elastic member 525, and the other end is abutted against the limiting member 524 under the elastic action of the first elastic member 525. Among them, the limiting member 524 and the blocking member 523 are both cylindrical pins, and the setting of the two can limit the upper and lower ends of the movable mold pressing petal 522 to slide, and on the other hand, when disassembling, it is only necessary to remove the limiting member 524 and the blocking member 523 in turn, and the movable mold pressing petal 522 and the movable mold pressing seat 521 can be disassembled, which is very convenient and fast. In addition, the limiting member 524 and the blocking member 523 can also fine-tune the position of the movable die 522 to achieve an optimal crimping state.

[0067] The movable mold pressing seat 521 and the movable mold pressing flap 522 also have correspondingly set inspection marks 55. When the inspection marks 55 on the movable mold pressing seat 521 and the movable mold pressing flap 522 are aligned with each other, it is the initial position. If the inspection marks 55 on the movable mold pressing seat 521 and the movable mold pressing flap 522 deviate during long-term use (such as dust and impurities accumulated between the movable mold pressing flap 522 and the movable mold pressing seat 521, causing the positions of the two to deviate), the user can be prompted that there is a deviation in the position, which will affect the crimping effect. At this time, the limiter 524 and the blocking member 523 can be disassembled, and then the movable mold pressing flap 522 can be disassembled for cleaning and then reassembled until the inspection marks 55 on the movable mold pressing seat 521 and the movable mold pressing flap 522 are adjusted to the aligned position. The inspection marks 55 are convenient for users to judge whether the movable mold can be used normally.

[0068] like Fig.17 As shown, the bottom of the arc-shaped guide slot 5211 protrudes to one side to form a limiting slot 5212, and the outer end of the arc-shaped guide slider 5221 protrudes to one side to form a limiting convex edge 5223 embedded in the limiting slot 5212, so that the connection between the arc-shaped guide slot 5211 and the arc-shaped guide slider 5221 forms a mutually interlocking form, which enhances the connection stability. In addition, this mutually interlocking form can also make the arc-shaped guide slot 5211 a shallow groove, without having to be opened too deep, reducing the difficulty of processing and making the structure lightweight.

[0069] like Fig.15As shown, the fixed mold 51 includes an integral fixed mold seat 511 and a fixed mold flap 512, and the two ends of the fixed mold seat 511 are rotatably connected to a movable mold seat 521, and the movable mold seat 521 is provided with a mounting hole 5213 on one side facing the fixed mold seat 511, and an auxiliary mold clamping structure is provided in the mounting hole, and the auxiliary mold clamping structure has a push rod spring 571 and a push rod 572, one end of the push rod spring 571 extends into the mounting hole 5213, and the other end is sleeved on the push rod 572, and the push rod 572 is nested in the other end of the push rod spring 571, and has a head protruding from the push rod spring 571 in the radial direction, and the head is pressed on the fixed mold seat. The shape of the inner side of the fixed mold flap 512 and the movable mold flap 522 that contacts the crimping target can be set according to the standard of the pipe fittings to be crimped.

[0070] like Figure 13-Figure 18 As shown, a pair of inserting plates 513 are formed at both ends of the fixed mold pressing seat 511, and a pair of slots 527 for inserting the inserting plates 513 are respectively formed on one side of the movable mold pressing seat 521 located at both ends of the fixed mold pressing seat 511 facing the fixed mold pressing seat 511, and the auxiliary mold clamping structure is installed in one of the slots 513, and the auxiliary mold clamping structures located at both ends of the fixed mold pressing seat 511 are staggered. Specifically, as Fig.18 As shown, a pair of plug plates 513 are arranged up and down with a gap in the middle. Correspondingly, three plug plates are formed on the side of the movable mold seat 521 facing the fixed mold seat 511, and two slots 527 are formed between the three plug plates. The middle plug plate on the movable mold seat 521 is inserted into the gap between the pair of plug plates 513 of the fixed mold seat 511. The pair of plug plates 513 are respectively inserted into the two slots 527, and then the fixed mold seat 511 is connected to the movable mold seat 521 through the five plug plates in sequence through the cylindrical hinge pin 58. Both ends of the cylindrical hinge pin 58 are respectively provided with retaining springs for limiting its radial movement.

[0071] The movable mold pressing seat 521 can rotate relative to the fixed mold pressing seat 511 with the cylindrical hinge pin 58 as the axis. A limit component for limiting the rotation angle of the mold pressing seat 521 is also provided between the fixed mold pressing seat 511 and the movable mold pressing seat 521. Fig.16 As shown, the limiting assembly includes a cylindrical positioning pin 591 inserted on the insert plate 513 at both ends of the fixed mold pressing seat 511, and a limiting protrusion 592 formed on the outer end of an insert plate located in the middle of the movable mold pressing seat 521, and the limiting protrusion 592 forms an arc edge on the side facing the cylindrical positioning pin 591 that can be attached to the circumferential surface of the cylindrical positioning pin 591.

[0072] The fixed mold pressure flap 512 and the movable mold pressure flap 522 on both sides thereof are combined to form a mold flap that contacts and performs crimping with the second crimping target 12. In the initial state, as shown in the figure, there is a gap between the fixed mold pressure flap 512 and the movable mold pressure flap 522 on both sides thereof. After the second crimping mold 5 is subjected to the force of the caliper 3, the lower ends of the two movable mold pressure flaps 522 are closed and will gradually move toward the side where the fixed mold pressure flap 512 is located, thereby gradually closing the gap. When the fixed mold pressure flap 512 is against the movable mold pressure flap 522 on both sides thereof and the bottoms of the two movable mold pressure flaps 522 are also against each other, the crimping process can be completed.

[0073] The two movable die flaps 522 are provided with a first notch 5224 at one end close to the fixed die flap 512, and a first dirt storage tank 56 is formed between the first notch 5224 and the end of the fixed die flap 512. Even when the movable die flap 522 and the fixed die flap 512 are at abutment against each other, the first dirt storage tank 56 still exists. Since the working scene of pipe crimping is usually at a construction site, dust and impurities are easily contaminated on the pipe. During the crimping process, dust and impurities on the pipe can enter the first dirt storage tank 56 along the edge of the second crimping hole 53, and then fall off during the opening process of the movable die 52 after the subsequent crimping is completed, thereby avoiding dust and impurities accumulating in the second crimping hole 53 and affecting the pipe crimping effect.

[0074] The working principles of the first crimping die and the second crimping die of this embodiment are as follows:

[0075] When crimping a target with a small diameter, select the first crimping die 4, open the first crimping die 4 and clamp it on the outer periphery of the crimping target, install the caliper 3 on the mounting seat 23 at the front end of the main body 21, and then fit the spherical fitting part 37 on the caliper 3 into the spherical groove 48 on the two crimping ring arms of the first crimping die 4, start the driving part 2, and the roller 22 acts on the two clamp arms of the caliper 3, causing the front ends of the two clamp arms to gradually move closer together. Under the action of the clamp arms, the two crimping ring arms also gradually move closer together until the lower ends of the two crimping ring arms abut against each other, thereby completing the crimping of the crimping target.

[0076] When crimping a target with a large diameter, select a second crimping die 5, open the second crimping die 5 and clamp it on the outer periphery of the crimping target, install the caliper 3 on the mounting seat 23 at the front end of the main body 21, and then fit the spherical mating part 37 on the caliper 3 into the spherical groove 54 of the ring die on the two movable dies of the second crimping die 5, start the driving part 2, and the roller 22 acts on the two clamp arms of the caliper 3, causing the front ends of the two clamp arms to gradually move closer. Under the action of the clamp arms, the two movable dies also gradually move closer, and the movable die pressure petal 522 gradually moves toward the fixed die pressure petal 512 until the lower ends of the two movable die pressure petals 522 abut against each other, and the upper ends abut against the fixed die pressure petal 512 respectively, thereby completing the crimping of the crimping target.

[0077] Among them, when the caliper 3 is matched to the first crimping die 4 or the second crimping die 5, since the two are spherically matched, the installation angle between the two can be adjusted according to the actual working environment to adapt to different application scenarios.

[0078] Embodiment Function and effect:

[0079] According to the compression pipe connection tool of the above embodiment, since it has a first crimping die 4 and a second crimping die 5, the first crimping die 4 and the second crimping die 5 are installed on the caliper 3 for use when working, and the first crimping hole 43 and the second crimping hole 53 in the first crimping die 4 and the second crimping die 5 have different apertures, so that the user can select an appropriate crimping die for crimping according to the size of the target object to be crimped when using it, and only the crimping die needs to be replaced when replacing, which is very convenient and quick. In addition, a spherical groove is provided on the pressing ring arm of the first crimping die 4 and the movable die of the second crimping die 5, and the caliper 3 has a spherical matching portion 37 that matches the spherical groove, so that the caliper 3 and the first crimping die 4 or the second crimping die 5 adopt a spherical contact match when connecting. When working, the caliper 3 can rotate with the first crimping die 4 or the second crimping die 5 to form more angles, so as to achieve "universal crimping" to adapt to different working environments, especially in some relatively narrow construction environments such as pipeline wells and wall holes.

[0080] Furthermore, the same caliper 3 can meet the requirements of pipe crimping connection of various materials and specifications. For crimping targets of small pipe diameters (for example, pipes with a nominal diameter of 30 mm and below), a two-petal crimping ring (first crimping die) is used for crimping, which simplifies the tool structure design; for crimping targets of large pipe diameters (for example, pipes with a nominal diameter of more than 30 mm), a 3-petal ring die structure (second crimping die) is used, and the movable die adopts a guide slide design with a spring reset device in the middle to ensure uniform contraction of the die petals during the crimping process and good centering of the pipe fittings after crimping.

[0081] Furthermore, a first avoidance groove and convex portions on both sides of the first avoidance groove are provided on the edge of the spherical groove, and a second avoidance groove for avoiding the convex portion is provided on one side of the spherical mating portion, so that the calipers will not hinder each other during the connection with the first crimping die or the second crimping die, thereby solving the interference problem during crimping at any angle, making the connection and rotation smoother, while also ensuring the strength of the snap-fit ​​ball socket and achieving the purpose of lightweight structure.

[0082] Furthermore, a pin hinge design is adopted between the fixed mold 51 and the movable mold 52 of the ring mold, and a limit assembly is also provided at the connection between the two, which can limit the rotation angle of the two movable mold pressing petals 522 to be too large, so as to prevent the two movable mold pressing petals 522 from being unilaterally squeezed when the wall thickness of the pipe is uneven, resulting in poor crimping effect.

[0083] Furthermore, the outwardly tilted convex edge portion 371 of the rear end of the caliper 3 is designed to facilitate the operation of opening the caliper by hand-pressing, thereby preventing the user's fingers from getting caught in the mounting seat 23 of the drive unit 2 and causing harm.

[0084] Furthermore, the first crimping die 4 and the second crimping die 5 are both provided with a dirt storage tank, so as to reduce the risk of being unable to close the mold due to mud, sand, and the squeeze of the leak-proof card heat shrink film at the construction site.

[0085] Furthermore, the second crimping die 5 adopts a lightweight multi-petal ring die structure design, and the lightweight design of the shallow arc guide groove on the movable die pressing seat 521 is convenient for processing. In addition, shallow guide rails are used to guide the two ends, which is more compact.

[0086] Furthermore, the structures of the first crimping die 4 and the second crimping die 5 are designed to limit the opening (rotation) angle, that is, the smaller first crimping die 4 cannot be fastened on the larger pipe fitting (the second crimping target), thereby protecting the first crimping die 4 and implementing fool-proof (error-proofing) measures to avoid incorrect use of the first crimping die 4 and the second crimping die 5.

[0087] Furthermore, the second crimping die 5 has inspection markings in the non-crimping state, so that the user can check whether the die halves of the ring die are flexible in the initial state before construction.

[0088] Furthermore, the first crimping die 4 and the second crimping die 5 have a snap-fit ​​anti-slip design to prevent the ring die from falling off the pipe fitting and causing damage. For example, the second crimping die 5 is designed with an auxiliary clamping structure formed by a combination of a push rod spring and a push rod, and combined with the above-mentioned limit assembly, when the second crimping die 5 is snapped on the crimping target or the crimping is completed, the auxiliary clamping structure can prevent the ring die from falling off the pipe fitting to avoid causing harm to the user; the torsion spring 45 on the first crimping die 4 can also play a similar functional role.

[0089] The above embodiments are only used to illustrate specific implementation modes of the present invention, and the present invention is not limited to the description scope of the above embodiments.

Claims

1. A compression type pipe connection tool, characterized in that: include: Drive unit; A caliper is mounted on the driving part and is driven by the driving part to open and close. A first crimping die, used to act on a first crimping target; and a second crimping die for acting on a second crimping target; Wherein, one of the first crimping die and the second crimping die is rotatably mounted on the caliper to work. The first crimping die has a pair of symmetrically arranged crimping ring arms, and a first crimping hole for the first crimping target to pass through is formed between the pair of crimping ring arms. The second crimping die comprises: Fixed mold, The movable mold assembly comprises two movable molds arranged on both sides of the fixed mold. A second crimping hole for the second crimping target to pass through is formed between the fixed die and the movable die set. The pressing ring arm and the movable mold are both provided with a spherical groove, and the caliper has a spherical matching portion that matches the spherical groove; the aperture of the first crimping hole is smaller than or equal to the aperture of the second crimping hole; A first avoidance groove and convex parts on both sides of the first avoidance groove are provided at the edge of the spherical groove, and a second avoidance groove for avoiding the convex part is opened on one side of the spherical matching part.

2. The compression type pipe connection tool according to claim 1, characterized in that: The caliper comprises: a pair of pliers arms, having working ends, on which the spherical mating portions are disposed; A pair of connecting plates, used to connect the middle parts of the pair of clamp arms together, and the clamp arms rotate relative to the connecting plates; And a pair of connecting pins are used to connect the clamp arm with the connecting plate.

3. The compression type pipe connection tool according to claim 2, characterized in that: The movable mold comprises: The movable mold press seat has one end rotatably connected to the fixed mold, and the other end is provided with the spherical groove, and the inner side is provided with an arc-shaped guide groove; The movable die pressing petal is movably arranged inside the movable die pressing seat and is formed with an arc-shaped guide sliding block matched with the arc-shaped guide sliding groove, and a limiting notch is also arranged on the arc-shaped guide sliding block along the arc direction; A blocking member is inserted at one end of the movable mold pressing seat away from the fixed mold and is arranged to penetrate the arc-shaped guide sliding groove along the axial direction, and is used to block one end of the arc-shaped guide sliding block; A limiting member is inserted on the movable mold pressing seat and penetrates the limiting notch along the axial direction; A first elastic member is installed in the limiting notch; and a first steel ball, one end of which is abutted against the first elastic member, and the other end of which is abutted against the limiting member; Wherein, the arc length of the arc-shaped guide sliding block is smaller than the arc length of the arc-shaped guide sliding groove.

4. The compression type pipe connection tool according to claim 3, characterized in that: The movable mold pressing seat and the movable mold pressing petal are provided with corresponding inspection markings; the bottom of the arc-shaped guide sliding groove protrudes to one side to form a limiting groove, and the outer end of the arc-shaped guide sliding block protrudes to one side to form a limiting convex edge embedded in the limiting groove.

5. The compression type pipe connection tool according to claim 3, characterized in that: The fixed mold includes an integral fixed mold pressing seat and a fixed mold pressing flap, the movable mold pressing flap is provided with a first notch at one end close to the fixed mold pressing flap, and a first dirt storage tank is formed between the first notch and the end of the fixed mold pressing flap.

6. The compression type pipe connection tool according to claim 5, characterized in that: The two ends of the fixed mold press seat are rotatably connected to the movable mold press seat, and a mounting hole is opened on one side of the movable mold press seat facing the fixed mold press seat, and an auxiliary mold clamping structure is arranged in the mounting hole, and the auxiliary mold clamping structure has: The ejector spring has one end extending into the mounting hole. A push rod is nested in the other end of the push rod spring and has a head protruding from the push rod spring in the radial direction. The ejector head is pressed on the fixed mold pressing seat.

7. The compression type pipe connection tool according to claim 6, characterized in that: A pair of plug plates are formed at both ends of the fixed mold press seat, and a pair of slots for inserting the plug plates are respectively opened on one side of the movable mold press seat facing the fixed mold press seat at both ends of the fixed mold press seat, and the auxiliary mold clamping structure is installed in one of the slots, and the auxiliary mold clamping structures located at both ends of the fixed mold press seat are staggered.

8. The compression type pipe connection tool according to any one of claims 2 to 7, characterized in that: A spherical mounting groove and an inclined mounting groove are respectively provided on opposite sides of the middle part of the pair of clamp arms, a second steel ball is arranged between the two oppositely arranged spherical mounting grooves, and a spring is arranged between the two oppositely arranged inclined mounting grooves.

9. The compression type pipe connection tool according to claim 8, characterized in that: The end of the clamp arm away from the working end is formed with a driving end, and the two driving ends have a separated state and a closed state, and the driving part includes: main body, A pair of rollers are movably arranged on the main body and act on the driving ends of the pair of clamp arms to cause the two driving ends to separate from each other. A mounting base for mounting the caliper, When the driving end is in a closed state, the outer side of the driving end protrudes beyond the outer periphery of the mounting seat.

10. The compression type pipe connection tool according to any one of claims 1 to 7, characterized in that: The first crimping die also has: A hinge pin is used to rotatably connect one end of the pair of pressure ring arms together. The torsion spring is sleeved on the hinge pin and acts on the pair of pressure ring arms respectively. The pressing ring arm has a hinged end, and a rotating plate for plugging the pair of pressing ring arms together is arranged on the hinged end. A limiting convex edge for limiting the rotation angle is formed on the rotating plate. A second notch is correspondingly arranged at one side of the first crimping hole in the middle of a pair of pressing ring arms, and a second ash storage tank is formed between the two second notches.

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