Variable-diameter sizing device

Abstract

The utility model discloses a variable-diameter sizing device which comprises a cylindrical sizing sleeve, a base plate coaxially arranged at the front end of the sizing sleeve in a sleeving mode, a sliding flange coaxially arranged at the rear end of the sizing sleeve in a sleeving mode in the front-back direction and an adjusting mechanism connected between the base plate and the sliding flange. Each adjusting gap extends in the front-back direction, an opening is formed in the rear end of the sizing sleeve, and the multiple adjusting gaps are evenly distributed in the circumferential direction of the sizing sleeve. The adjusting mechanism is used for adjusting the distance between the sliding flange and the base plate; when the sliding flange is close to the base plate, the inner diameter of the sizing sleeve is reduced, and when the sliding flange is far away from the base plate, the inner diameter of the sizing sleeve is increased; the device is simple in structure and convenient to operate, the inner diameter of the sizing sleeve is adjusted, the production requirements of products of different specifications are met, the production range is expanded, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic pipe forming equipment, in particular to a variable-diameter sizing device. BACKGROUND

[0002] In current plastic pipe production, when producing pipe products of different pressure grades of the same specification, different sizes of mandrels and sizing sleeves need to be replaced, the sizing sleeve is usually made of wear-resistant copper, which is high in cost and complicated to replace, and is prone to cause raw material waste. SUMMARY

[0003] In order to solve the above technical problems, the purpose of the present application is to provide a variable-diameter sizing device.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a variable-diameter sizing device, comprising:

[0005] The sizing sleeve is cylindrical, a plurality of adjusting gaps are formed in the sizing sleeve, each adjusting gap extends in the front-rear direction, and the sizing sleeve has an opening at the rear end portion, and the plurality of adjusting gaps are uniformly distributed in the circumferential direction of the sizing sleeve;

[0006] A base plate is coaxially sleeved at the front end portion of the sizing sleeve;

[0007] A sliding flange is coaxially sleeved at the rear end portion of the sizing sleeve and can move in the front-rear direction; and

[0008] An adjusting mechanism is connected between the base plate and the sliding flange, and is used to adjust the distance between the sliding flange and the base plate;

[0009] When the sliding flange is close to the base plate, the inner diameter of the sizing sleeve decreases, and when the sliding flange is away from the base plate, the inner diameter of the sizing sleeve increases.

[0010] In the above technical scheme, further preferably, the rear end portion of the sizing sleeve forms an adjusting portion matched with the sliding flange, the adjusting portion is conical, and the outer diameter of the adjusting portion gradually decreases from front to back.

[0011] In the above technical scheme, further preferably, each adjusting gap extends in a wave shape from front to back.

[0012] In the above technical solution, further preferably, the adjusting mechanism comprises a plurality of connecting rods and a plurality of rod sleeves, the number of the connecting rods is consistent with the number of the rod sleeves, the plurality of connecting rods are uniformly distributed along the circumference of the sizing sleeve, each of the connecting rods extends in the front-rear direction, the front end of the connecting rod is provided on the base plate, the rear end of the connecting rod is threadedly connected with one of the rod sleeves, the rod sleeve is installed on the sliding flange, and the rod sleeve is configured to move back and forth along the axis of the connecting rod when the connecting rod rotates around its own axis.

[0013] In the above technical solution, further preferably, the adjusting mechanism further comprises an adjusting gear and a plurality of pinions, the number of the pinions is consistent with the number of the connecting rods, the front end of each of the connecting rods is coaxially connected with one of the pinions, the adjusting gear is engaged with the plurality of pinions, and the adjusting gear is coaxially sleeved on the sizing sleeve.

[0014] In the above technical solution, further preferably, a positioning plate is coaxially sleeved on the sizing sleeve, the positioning plate is located between the base plate and the sliding flange, and each of the connecting rods penetrates the positioning plate.

[0015] In the above technical solution, further preferably, a plurality of connecting bolts are connected between the base plate and the positioning plate, and the plurality of connecting bolts and the plurality of connecting rods are alternately arranged in the circumferential direction of the sizing sleeve.

[0016] In the above technical solution, further preferably, a water ring is coaxially sleeved on the front end of the sizing sleeve, the water ring is located on the front side of the adjusting mechanism and the base plate, and a plurality of water holes are uniformly arranged on the circumference of the water ring.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] The application has the advantages of simple structure and convenient operation, the sliding flange sleeved on the rear end of the sizing sleeve is controlled to move forward and backward by the adjusting mechanism, the adjusting gap arranged on the sizing sleeve is matched, the inner diameter of the sizing sleeve is adjusted, the production requirements of products of different specifications are met, the production range is expanded, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A three-dimensional mechanism schematic diagram of a variable-diameter sizing device is provided for the embodiments of the application.

[0020] Figure 2 For Figure 1a front view of the sizing device in the figure;

[0021] Figure 3 to the diameter of the pipe Figure 2 a sectional view along the line A-A in the figure;

[0022] Figure 4 to the diameter of the pipe Figure 3 a partial enlarged view at B in the figure;

[0023] Figure 5 to the diameter of the pipe Figure 1 a side view of the sizing device in the figure.

[0024] wherein: 1, sizing sleeve; 101, adjusting gap; 102, adjusting part; 2, base plate; 3, sliding flange; 4, connecting pull rod; 5, pull rod sleeve; 6, nut; 7, adjusting gear; 8, pinion; 9, positioning plate; 10, connecting bolt; 11, water ring; 110, water hole. DETAILED DESCRIPTION

[0025] To describe the technical content, structural features, purposes and effects of the application, the technical solutions in the embodiments of the application will be described below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all the embodiments. In the following description, for the purpose of explanation, many specific details are set forth in order to provide a thorough understanding of various exemplary embodiments or implementations of the application. However, various exemplary embodiments can also be implemented without these specific details or in one or more equivalent arrangements. In addition, various exemplary embodiments can be different, but not necessarily exclusive. For example, the specific shape, structure and characteristics of the exemplary embodiments can be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0026] The embodiments of the application provide a variable-diameter sizing device, as shown in Figure 1 , 2 The sizing device includes a cylindrical sizing sleeve 1, a base plate 2 coaxially sleeved at the front end of the sizing sleeve 1, a sliding flange 3 coaxially sleeved at the rear end of the sizing sleeve 1, and an adjusting mechanism connected between the base plate 2 and the sliding flange 3. The sliding flange 3 is movably installed on the sizing sleeve 1 in the forward and backward directions. When the sliding flange 3 moves forward to approach the base plate 2, the inner diameter of the sizing sleeve 1 decreases, and when the sliding flange 3 moves away from the base plate 2, the inner diameter of the sizing sleeve 1 increases. The adjusting mechanism moves the sliding flange 3 forward and backward, thereby adjusting the inner diameter of the sizing sleeve 1.

[0027] The sizing sleeve 1 has multiple adjusting slots 101, each extending in the front-to-back direction and having an opening at the rear end of the sizing sleeve 1. The multiple adjusting slots 101 are evenly distributed circumferentially on the sizing sleeve 1. In this embodiment, each adjusting slot 101 extends in a wave-like pattern from front to back. The rear end of the sizing sleeve 1 forms an adjusting portion 102 that cooperates with the sliding flange 3. The adjusting portion 102 is tapered, and its outer diameter gradually decreases from front to back. When the sliding flange 3 moves forward, the pressure on the adjusting portion 102 from the sliding flange 3 gradually increases, causing it to contract inward, thus reducing the width of each adjusting slot 101 and achieving the purpose of reducing the inner diameter of the sizing sleeve 1. When the sliding flange 3 moves backward, the pressure on the adjusting portion 102 from the sliding flange 3 decreases, thus releasing outward, thus increasing the width of each adjusting slot 101 and achieving the purpose of increasing the inner diameter of the sizing sleeve 1.

[0028] The sizing sleeve 1 is made of wear-resistant copper, which gives it a certain toughness to adapt to diameter changes and extends its service life.

[0029] like Figures 3-5 As shown, the adjusting mechanism is used to adjust the distance between the sliding flange 3 and the base plate 2, thereby adjusting the inner diameter of the sizing sleeve 1. The adjusting mechanism includes multiple connecting rods 4 and multiple connecting rod sleeves 5. The number of connecting rods 4 is the same as the number of connecting rod sleeves 5. The multiple connecting rods 4 are evenly distributed along the circumference of the sizing sleeve 1. Each connecting rod 4 extends in the front-back direction. The front end of the connecting rod 4 passes through the base plate 2, and the rear end of the connecting rod 4 is threadedly connected to a connecting rod sleeve 5. The connecting rod sleeve 5 passes through the sliding flange 3 and is fixed to the sliding flange 3 by a nut 6. When the connecting rod 4 rotates around its own axis, the connecting rod sleeve 5 threadedly connected to the connecting rod 4 moves back and forth along the axis of the connecting rod 4. The back-and-forth movement of the connecting rod sleeve 5 drives the sliding flange 3 to move back and forth to adjust the inner diameter of the sizing sleeve 1.

[0030] The adjusting mechanism also includes an adjusting gear 7 and multiple pinions 8. The number of pinions 8 is the same as the number of connecting rods 4. The front end of each connecting rod 4 is coaxially connected to a pinion 8. The adjusting gear 7 meshes with multiple pinions 8 simultaneously and is rotatably coaxially sleeved on the sizing sleeve 1. When the adjusting gear 7 rotates, each pinion 8 drives the coaxially connected connecting rod 4 to rotate around the axis of the connecting rod 4. The multiple pinions 8 rotate synchronously, causing the sliding flange 3 to move back and forth parallel to the base plate 2 through the drive of the multiple threaded connecting rods 4 and the rod sleeves 5.

[0031] The sizing device further comprises a positioning plate 9 coaxially sleeved on the sizing sleeve 1, the positioning plate 9 is located between the base plate 2 and the sliding flange 3, each connecting pull rod 4 is threaded through the positioning plate 9, the base plate 2 and the positioning plate 9 are spaced apart from front to back, and cooperatively support the plurality of connecting pull rods 4 in parallel around the sizing sleeve 1, so as to avoid the connecting pull rods 4 from deviating from the front-to-back direction during rotation, and ensure stability during adjustment.

[0032] As shown in Figure 1 , 3 , 5, a plurality of connecting bolts 10 are further connected between the base plate 2 and the positioning plate 9, the plurality of connecting bolts 10 are alternately arranged with the plurality of connecting pull rods 4 in the circumferential direction of the sizing sleeve 1, and the plurality of connecting bolts 10 strengthen the stability of the positioning plate 9 mounted on the sizing sleeve 1.

[0033] The sizing device further comprises a water ring 11 coaxially sleeved on the front end of the sizing sleeve 1, the water ring 11 is located on the front side of the base plate 2 and the adjusting mechanism, and a plurality of water holes 110 are uniformly arranged in the circumferential direction of the water ring 11.

[0034] The structure of the present application is simple and convenient to operate, the sliding flange sleeved on the rear end of the sizing sleeve is controlled to move forward and backward by the adjusting mechanism, and the adjusting gap arranged on the sizing sleeve is matched, so as to realize the adjustment of the inner diameter of the sizing sleeve, meet the production requirements of products of different specifications, expand the production range, and improve the production efficiency.

[0035] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, the above examples and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and the scope of protection of the present application is defined by the appended claims, the specification and their equivalents.

Claims

1. A variable diameter sizing device, comprising: include: The sizing sleeve is cylindrical in shape and has multiple adjustment slots. Each adjustment slot extends in the front-to-back direction and has an opening at the rear end of the sizing sleeve. The multiple adjustment slots are evenly distributed around the circumference of the sizing sleeve. The substrate is coaxially sleeved at the front end of the sizing sleeve; A sliding flange is coaxially sleeved on the rear end of the sizing sleeve, which can move in the front-back direction; and An adjustment mechanism is connected between the base plate and the sliding flange, and the adjustment mechanism is used to adjust the distance between the sliding flange and the base plate; Specifically, when the sliding flange is close to the base plate, the inner diameter of the sizing sleeve decreases, and when the sliding flange is far from the base plate, the inner diameter of the sizing sleeve increases.

2. The sizing device of claim 1, wherein, The rear end of the sizing sleeve forms an adjustment section that mates with the sliding flange. The adjustment section is tapered, and its outer diameter gradually decreases from front to back.

3. The sizing device of claim 1, wherein, Each of the aforementioned adjustment gaps extends in a wave shape from front to back.

4. The sizing device of claim 1, wherein, The adjusting mechanism includes multiple connecting rods and multiple connecting rod sleeves. The number of connecting rods is the same as the number of connecting rod sleeves. The multiple connecting rods are evenly distributed along the circumference of the sizing sleeve. Each connecting rod extends in the front-rear direction. The front end of each connecting rod passes through the base plate, and the rear end of each connecting rod is threadedly connected to one of the connecting rod sleeves. The connecting rod sleeve is installed on the sliding flange. The connecting rod sleeve is configured to move back and forth along the axis of the connecting rod when the connecting rod rotates about its own axis.

5. The sizing device of claim 4, wherein, The adjustment mechanism further includes an adjustment gear and multiple pinions. The number of pinions is the same as the number of connecting rods. The front end of each connecting rod is coaxially connected to one of the pinions. The adjustment gear meshes with the multiple pinions simultaneously. The adjustment gear is rotatably coaxially sleeved on the sizing sleeve.

6. The sizing device of claim 5, wherein, It also includes a positioning plate coaxially sleeved on the sizing sleeve, the positioning plate being located between the base plate and the sliding flange, and each of the connecting rods passing through the positioning plate.

7. The sizing device of claim 6, wherein, Multiple connecting bolts are also connected between the base plate and the positioning plate, and the multiple connecting bolts and the multiple connecting rods are arranged alternately in the circumference of the sizing sleeve.

8. The sizing device of claim 1, wherein, It also includes a water ring coaxially sleeved at the front end of the sizing sleeve, the water ring being located in front of the base plate and the adjustment mechanism, and the water ring having a plurality of water passage holes evenly distributed in the circumferential direction.

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