Adjustable sizing sleeve capable of improving adjusting precision

Abstract

The utility model discloses an adjustable sizing sleeve capable of improving adjusting precision, and belongs to the technical field of plastic pipe forming. The sizing sleeve comprises a sizing sleeve body, the outlet end of the sizing sleeve body is provided with a deformation part, the inner diameter of the sizing sleeve body is adjusted through deformation of the deformation part, a plurality of mounting grooves are formed in the inner wall of the sizing sleeve body, and the mounting grooves are sequentially distributed in the axis direction of the sizing sleeve body; the elastic supporting rings are embedded into the mounting grooves in sequence, and when the deformation part deforms, the whole sizing sleeve body deforms and then compresses or releases the elastic supporting rings to generate deformation so as to adjust the diameter of the pipe. According to the sizing sleeve, the elastic supporting ring is installed in the sizing sleeve body, the inner diameter is round no matter the sizing sleeve body is compressed or released, in addition, even if the deformation degrees of the arc plates of the sizing sleeve bodies are different, the deformation of the elastic supporting ring is uniform after the deformation degrees are transmitted to the whole-circle elastic supporting ring, so that the deformation of a pipe is more uniform, and the deformation of the pipe is more uniform. And the size precision of the pipe after diameter adjustment is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic pipe molding, and in particular relates to an adjustable sizing sleeve which can improve the adjustment accuracy. Background Art

[0002] In the extrusion production process of plastic pipes, the tube blank needs to be cooled and formed after extrusion. The current cooling and forming method is mainly that the extruded tube blank passes through a sizing sleeve under the action of traction, and is cooled, shrunk, and formed by the sizing sleeve under a vacuum environment. However, due to the different shrinkage rates of extruded pipes of the same specification but different pressure levels, it is necessary to equip each pressure level with a corresponding sizing sleeve, resulting in a very large number of sizing sleeves, complex management and high costs. At the same time, the sizing sleeves need to be frequently replaced during production, which is labor-intensive and costly.

[0003] To solve the above problems, an adjustable sizing sleeve is currently available, which can adjust the diameter of the pipe. However, since the sizing sleeve itself is composed of a structure composed of multiple arc plates distributed at intervals, it is not a complete cylindrical structure. Therefore, in the process of adjusting the diameter of the pipe by changing the diameter of the sizing sleeve itself, on the one hand, the inner diameter formed by the deformation of each arc plate is a non-circular structure composed of multiple arc segments. On the other hand, due to reasons such as processing accuracy and assembly accuracy, the deformation degree of each arc plate is not the same, which ultimately leads to a reduction in the accuracy of the outer diameter of the pipe. Summary of the invention

[0004] The utility model aims at solving the above problems in the prior art and proposes an adjustable sizing sleeve which can improve the adjustment accuracy.

[0005] The utility model can be realized through the following technical solutions:

[0006] An adjustable sizing sleeve capable of improving adjustment accuracy comprises:

[0007] The sizing sleeve body has an outlet end provided with a deformation portion, and its inner diameter is adjusted by deformation of the deformation portion. The inner wall of the sizing sleeve body is provided with a plurality of mounting grooves, and each of the mounting grooves is sequentially distributed along the axial direction of the sizing sleeve body;

[0008] There are multiple elastic support rings which are sequentially embedded in the installation grooves. When the deformation portion is deformed, the sizing sleeve body is deformed as a whole to compress or release the elastic support rings to adjust the diameter of the pipe.

[0009] As a further improvement of the present invention, the outer diameter of the elastic support ring abuts against the inner diameter of the mounting groove, and the elastic support ring and the mounting groove form a clearance fit in the axial direction.

[0010] As a further improvement of the utility model, the elastic support ring is provided with an inclined notch.

[0011] As a further improvement of the present invention, the inclined notches of two adjacent elastic support rings are staggered.

[0012] As a further improvement of the present invention, there is a gap between two adjacent mounting grooves, and the wall thickness of the elastic support ring is greater than the depth of the mounting groove. When the elastic support ring is embedded in the mounting groove, a vacuum suction channel is formed between the two adjacent elastic support rings.

[0013] As a further improvement of the utility model, a mounting plate is provided on the outer circumference of the inlet end of the sizing sleeve body, and a pull rod is passed through the mounting plate. One end of the pull rod is mounted on the mounting plate through an adjusting screw ring, and the other end of the pull rod is connected to a pressure ring, which abuts against the conical surface of the deformation portion, and a spring is also sleeved on the pull rod, and both ends of the spring abut against the mounting plate and the pressure ring respectively.

[0014] As a further improvement of the present invention, a transmission assembly is also provided on the mounting plate, which is cooperatively connected with the adjusting screw ring and is used to drive the adjusting screw ring to rotate. As the adjusting screw ring rotates, the pull rod is driven to move along its axial direction, so as to drive the pressure ring to move along the conical surface of the deformation part and squeeze and deform the deformation part.

[0015] As a further improvement of the present invention, the transmission assembly comprises:

[0016] A rotating nut, which is rotatably disposed on the mounting plate and is connected to the adjusting screw ring through a thread;

[0017] A first handle is installed on the rotating nut. The rotating nut is driven to rotate by the first handle, thereby driving the adjusting screw ring to move axially along the thread of the rotating nut and driving the pull rod to move.

[0018] As a further improvement of the present invention, the transmission assembly comprises:

[0019] A driving wheel, which is rotatably disposed on the mounting plate and is threadedly connected to the adjusting screw ring;

[0020] A driven wheel, which is rotatably disposed on the mounting plate and meshes with the driving wheel;

[0021] A second handle is installed on the driven wheel. The driven wheel is driven to rotate by the second handle. The driven wheel drives the adjusting screw ring to move axially along the thread of the driving wheel through the driving wheel and drives the pull rod to move.

[0022] As a further improvement of the utility model, it also includes a water cooling component, which has:

[0023] a water jacket, which is arranged on the mounting plate;

[0024] A water nozzle is connected to the water jacket and is used to transport cooling water. The cooling water is transported into the water jacket through the water nozzle and then flows into the sizing sleeve body for cooling.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] 1. By installing an elastic support ring inside the sizing sleeve body, even if the deformation degree of the arc plates of each sizing sleeve body is different, after being transferred to the elastic support ring of the whole circle, the deformation of the elastic support ring is relatively uniform, so that the deformation of the pipe is more uniform, thereby meeting the demand for adjusting the diameter of the pipe and ensuring the dimensional accuracy of the pipe after the diameter is adjusted;

[0027] 2. The elastic support ring has an inclined notch, and the inclined notches of two adjacent elastic support rings are staggered to ensure that after vacuuming, there will be no convex ribs on the surface of the produced pipe, thus ensuring the surface quality of the pipe;

[0028] 3. A spring is sleeved on the pull rod, and the two ends of the spring are respectively in contact with the mounting plate and the pressure ring. The spring is always in a compressed state, and the spring force provided by the spring can pull the transmission component toward the direction of the mounting plate, thereby eliminating the gap in the transmission component and achieving the purpose of elastic floating adjustment, making the transmission more stable and the adjustment accuracy higher;

[0029] 4. A limit block is set on the adjusting screw ring, and the limit block extends outward to the top surface of the rotating nut. When the elastic force of the spring is not enough to keep the rotating nut on the surface of the mounting plate, the adjusting screw ring will no longer move, but the rotating nut will move upward along the thread of the adjusting screw ring. At this time, the limit block can limit the rotating nut to prevent the rotating nut from detaching from the adjusting screw ring;

[0030] 5. The outer wall surface of the water jacket is engraved with a coarse adjustment scale. When the rotating nut rotates, the adjusting screw ring moves axially along the outer wall of the water jacket. The operator can know the adjustment range according to the coarse adjustment scale at the position of the adjusting screw ring. Specifically, when the rotating nut rotates one circle, the rotating nut moves a preset number of grids along the coarse adjustment scale;

[0031] 6. The surface of the mounting plate is also engraved with annular fine-tuning scales. The rotating nut moves along the fine-tuning scales during rotation, thereby reflecting the rotation angle of the rotating nut and the axial displacement of the pressure ring, and then reflecting the radial displacement of the deformation part. The coordination of the coarse-tuning scale and the fine-tuning scale greatly improves the adjustment accuracy of the entire sizing sleeve;

[0032] 7. On the one hand, the sizing sleeve of the present application eliminates the transmission gap through the setting of the elastic floating transmission mechanism, making the transmission more stable and improving the adjustment accuracy. On the other hand, it further achieves the purpose of fine adjustment through the coordination of the coarse adjustment scale and the fine adjustment scale. Compared with the adjustable sizing sleeve in the prior art, it is more practical and has more production value. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a cross-sectional view of an adjustable sizing sleeve capable of improving adjustment accuracy according to the first embodiment of the utility model;

[0034] Figure 2 The utility model Figure 1 A partial enlarged view of the middle A;

[0035] Figure 3 The utility model Figure 1 A partial enlarged view of point B in the middle;

[0036] Figure 4 It is a schematic diagram of the position of the coarse adjustment scale of the utility model;

[0037] Figure 5 It is a schematic diagram of the position of the fine adjustment scale of the utility model;

[0038] Figure 6 It is a cross-sectional view of an adjustable sizing sleeve capable of improving adjustment accuracy according to the second embodiment of the utility model;

[0039] Figure 7 The utility model Figure 6 A partial enlarged view of point C in the middle.

[0040] In the figure, 100, sizing sleeve body; 110, deformation part; 120, mounting groove; 121, vacuum suction channel; 130, elastic support ring; 131, suction tilting notch; 140, mounting plate; 141, fine adjustment scale; 150, pull rod; 151, adjusting screw ring; 152, pressure ring; 153, spring;

[0041] 200, transmission assembly; 210, rotating nut; 220, first handle; 230, limit block; 240, driving wheel; 250, driven wheel; 260, second handle;

[0042] 300. Water cooling assembly; 310. Water jacket; 311. Coarse adjustment scale; 320. Water nozzle. DETAILED DESCRIPTION

[0043] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical method of the present invention, but the present invention is not limited to these embodiments.

[0044] Embodiment 1

[0045] like Figure 1-5 As shown, the utility model provides an adjustable sizing sleeve capable of improving adjustment accuracy, comprising:

[0046] The sizing sleeve body 100 has a deformable portion 110 at its outlet end. The diameter of the pipe is adjusted by the deformation of the deformable portion 110. The inner wall of the sizing sleeve body 100 is provided with a plurality of mounting grooves 120. The mounting grooves 120 are sequentially distributed along the axial direction of the sizing sleeve body 100.

[0047] There are multiple elastic support rings 130 which are sequentially embedded in the installation grooves 120. When the deformation portion 110 is deformed, the sizing sleeve body 100 is deformed as a whole and then the elastic support rings 130 are compressed or released to deform so as to adjust the diameter of the pipe. Thus, only one sizing sleeve is needed to meet the sizing requirements of pipes of the same specification but different pressure levels.

[0048] It should be noted here that the sizing sleeve body 100 is composed of a plurality of arc plates arranged at intervals to form a circular structure. When the deformation portion 110 of the sizing sleeve body 100 is deformed, even if the deformation degrees of each arc plate are different, after being transferred to the full-circle elastic support ring 130, the deformation of the elastic support ring 130 is relatively uniform, thereby making the deformation of the pipe more uniform, thereby meeting the demand for adjusting the diameter of the pipe and ensuring the dimensional accuracy of the pipe after the diameter is adjusted.

[0049] Preferably, an inclined notch 131 is provided on the circumferential wall of the elastic support ring 130 for changing the circumference of the inner hole of the elastic support ring 130 and thus changing its inner diameter, and the inclined notches 131 of two adjacent elastic support rings 130 are staggered to ensure that after vacuum suction, no convex ribs will appear on the surface of the produced pipe, thereby ensuring the surface quality of the pipe.

[0050] Preferably, there is a gap between two adjacent mounting grooves 120, and the wall thickness of the elastic support ring 130 is greater than the depth of the mounting groove 120. Thus, when the elastic support ring 130 is embedded in the mounting groove 120, a vacuum suction channel 121 can be formed between the two adjacent elastic support rings 130 to perform vacuum suction on the pipe.

[0051] Preferably, a mounting plate 140 is provided on the outer circumference of the inlet end of the sizing sleeve body 100, and a pull rod 150 is passed through the mounting plate 140. One end of the pull rod 150 is mounted on the mounting plate 140 through an adjusting screw ring 151, and the other end of the pull rod 150 is connected to a pressure ring 152, which abuts against the conical surface of the deformation portion 110, and a spring 153 is also sleeved on the pull rod 150, and both ends of the spring 153 abut against the mounting plate 140 and the pressure ring 152 respectively.

[0052] Furthermore, a transmission assembly 200 is also provided on the mounting plate 140, which is connected with the adjusting screw ring 151 and is used to drive the adjusting screw ring 151 to rotate. As the adjusting screw ring 151 rotates, the pull rod 150 is driven to move along its axial direction, thereby driving the pressure ring 152 to move along the conical surface of the deformation part 110 and squeeze and deform the deformation part 110.

[0053] It should be noted here that the spring 153 is always in a compressed state, and the spring 153 force provided by it can pull the transmission assembly 200 toward the direction of the mounting plate 140, thereby eliminating the gap in the transmission assembly 200 and achieving the purpose of elastic floating adjustment, making the transmission more stable and the adjustment accuracy higher.

[0054] Preferably, the transmission assembly 200 comprises:

[0055] A rotating nut 210, which is rotatably disposed on the mounting plate 140 and is threadably connected to the adjusting screw ring 151;

[0056] The first handle 220 is installed on the rotating nut 210. The rotating nut 210 is driven to rotate by the first handle 220, thereby driving the adjusting screw ring 151 to move axially along the thread of the rotating nut 210 and driving the pull rod 150 to move. As a result, the pull rod 150 can drive the pressure ring 152 to move synchronously. The pressure ring 152 moves along the conical surface of the deformation part 110 and causes it to deform toward or away from the axial direction, thereby achieving the purpose of adjusting the diameter of the pipe.

[0057] In addition, it also includes a limit block 230, which is arranged on the end face of the adjusting screw ring 151 away from the mounting plate 140, and one end of the limit block 230 extends outward to the top of the rotating nut 210. When the elastic force of the spring 153 is insufficient to keep the rotating nut 210 on the surface of the mounting plate 140, the adjusting screw ring 151 will no longer move. Instead, the rotating nut 210 will move upward along the thread of the adjusting screw ring 151. At this time, the limit block 230 can limit the rotating nut 210 to prevent the rotating nut 210 from detaching from the adjusting screw ring 151.

[0058] Preferably, it also includes a water cooling assembly 300, which has:

[0059] A water jacket 310 disposed on the mounting plate 140;

[0060] The water nozzle 320 is connected to the water jacket 310 and is used to transport cooling water. The cooling water is transported into the water jacket 310 through the water nozzle 320 and then flows into the sizing sleeve body 100 for cooling.

[0061] A coarse adjustment scale 311 is engraved on the outer wall surface of the water jacket 310. During the rotation of the rotating nut 210, the adjusting screw ring 151 moves axially along the outer wall of the water jacket 310. Thus, the operator can know the adjustment amplitude according to the coarse adjustment scale 311 at the position of the adjusting screw ring 151. For example, when the rotating nut 210 rotates one circle, the rotating nut 210 moves one grid along the coarse adjustment scale 311.

[0062] In addition, the surface of the mounting plate 140 is also engraved with an annularly distributed fine-tuning scale 141. The rotating nut 210 moves along the fine-tuning scale 141 during the rotation process, thereby reflecting the rotation angle of the rotating nut 210, and then reflecting the radial displacement of the deformation part 110. Through the coordination of the coarse-adjusting scale 311 and the fine-tuning scale 141, the adjustment accuracy of the entire sizing sleeve is greatly improved.

[0063] That is to say, the sizing sleeve in this embodiment, on the one hand, eliminates the transmission gap through the setting of the elastic floating transmission mechanism, making the transmission more stable and improving the adjustment accuracy; on the other hand, through the cooperation of the coarse adjustment scale 311 and the fine adjustment scale 141, it further achieves the purpose of fine adjustment. Compared with the adjustable sizing sleeve in the prior art, it is more practical and has more production value.

[0064] Embodiment 2

[0065] like Figure 6-7 As shown, the difference between the second embodiment and the first embodiment is that the transmission assembly 200 of the second embodiment is different from that of the first embodiment. Specifically, the transmission assembly 200 includes:

[0066] A driving wheel 240, which is rotatably disposed on the mounting plate 140 and is threadedly connected to the adjusting screw ring 151;

[0067] A driven wheel 250 rotatably disposed on the mounting plate 140 and meshing with the driving wheel 240 ;

[0068] The second handle 260 is installed on the driven wheel 250. The driven wheel 250 is driven to rotate by the second handle 260. The driven wheel 250 drives the adjusting screw ring 151 to move axially along the thread of the driving wheel 240 through the driving wheel 240 and drives the pull rod 150 to move. Through the setting of the driving wheel 240 and the driven wheel 250, the force arm of the second handle 260 is increased when rotating, making the adjustment more labor-saving.

[0069] The technical means disclosed in the scheme of the utility model are not limited to the technical means disclosed by the above technical means, but also include technical solutions composed of any combination of the above technical features. The above is a specific implementation method of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

[0070] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0071] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used 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. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. An adjustable sizing sleeve capable of improving adjustment accuracy, characterized in that: include: The sizing sleeve body has an outlet end provided with a deformation portion, and its inner diameter is adjusted by deformation of the deformation portion. The inner wall of the sizing sleeve body is provided with a plurality of mounting grooves, and each of the mounting grooves is sequentially distributed along the axial direction of the sizing sleeve body; There are multiple elastic support rings which are sequentially embedded in the installation grooves. When the deformation portion is deformed, the sizing sleeve body is deformed as a whole to compress or release the elastic support rings to adjust the diameter of the pipe.

2. The adjustable sizing sleeve capable of improving adjustment accuracy according to claim 1, characterized in that: The outer diameter of the elastic support ring abuts against the inner diameter of the mounting groove, and the elastic support ring and the mounting groove form a clearance fit in the axial direction.

3. The adjustable sizing sleeve capable of improving adjustment accuracy according to claim 2, characterized in that: The elastic support ring is provided with an inclined notch.

4. The adjustable sizing sleeve capable of improving adjustment accuracy according to claim 3, characterized in that: The inclined notches of two adjacent elastic support rings are staggered.

5. The adjustable sizing sleeve capable of improving adjustment accuracy according to claim 1, characterized in that: There is a gap between two adjacent mounting grooves, and the wall thickness of the elastic support ring is greater than the depth of the mounting groove. When the elastic support ring is embedded in the mounting groove, a vacuum suction channel is formed between the two adjacent elastic support rings.

6. The adjustable sizing sleeve capable of improving adjustment accuracy according to claim 1, characterized in that: A mounting plate is provided on the outer circumference of the inlet end of the sizing sleeve body, and a pull rod is passed through the mounting plate. One end of the pull rod is mounted on the mounting plate through an adjusting screw ring, and the other end of the pull rod is connected to a pressure ring, which abuts against the conical surface of the deformation portion. A spring is also sleeved on the pull rod, and both ends of the spring abut against the mounting plate and the pressure ring respectively.

7. The adjustable sizing sleeve capable of improving adjustment accuracy according to claim 6, characterized in that: The mounting plate is also provided with a transmission assembly, which is connected with the adjusting screw ring and is used to drive the adjusting screw ring to rotate. As the adjusting screw ring rotates, the pull rod is driven to move along its axial direction, so as to drive the pressure ring to move along the conical surface of the deformation part and squeeze and deform the deformation part.

8. The adjustable sizing sleeve capable of improving adjustment accuracy according to claim 7, characterized in that: The transmission assembly comprises: A rotating nut, which is rotatably disposed on the mounting plate and is connected to the adjusting screw ring through a thread; A first handle is installed on the rotating nut. The rotating nut is driven to rotate by the first handle, thereby driving the adjusting screw ring to move axially along the thread of the rotating nut and driving the pull rod to move.

9. The adjustable sizing sleeve capable of improving adjustment accuracy according to claim 7, characterized in that: The transmission assembly comprises: A driving wheel, which is rotatably disposed on the mounting plate and is threadedly connected to the adjusting screw ring; A driven wheel, which is rotatably disposed on the mounting plate and meshes with the driving wheel; A second handle is installed on the driven wheel. The driven wheel is driven to rotate by the second handle. The driven wheel drives the adjusting screw ring to move axially along the thread of the driving wheel through the driving wheel and drives the pull rod to move.

10. The adjustable sizing sleeve capable of improving adjustment accuracy according to claim 6, characterized in that: Also included is a water cooling assembly having: a water jacket, which is arranged on the mounting plate; A water nozzle is connected to the water jacket and is used to transport cooling water. The cooling water is transported into the water jacket through the water nozzle and then flows into the sizing sleeve body for cooling.

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