Rolling mechanism and pipe reducing device

Abstract

The utility model discloses a kind of roller mechanism, and a kind of pipe shrinking device with a kind of roller mechanism is disclosed, one kind of roller mechanism includes roller pair, first support box and second support box, first support box installs one end of roller pair, second support box installs the other end of roller pair;Roller pair includes two roller shafts arranged obliquely, two roller shafts are arranged in parallel opposite;First support box includes first box, first thrust bearing and first sealing ring, first thrust bearing is located in the side of first box close to roller;Second support box includes second box, second thrust bearing and second sealing ring, second thrust bearing is located in the side of second box close to roller;Wherein, roller shaft is connected with sealing sleeve, sealing sleeve is located in the side of roller close to second thrust bearing, sealing sleeve and the side wall of second box abut.This utility model prevents coolant from entering bearing seat and bearing interior, avoid the moisture of coolant to cause bearing seat and bearing interior to be corroded.

Description

Technical Field

[0001] This utility model relates to the technical field of pipe processing equipment, and in particular to a roller pressing mechanism and a pipe shrinking device. Background Technology

[0002] Tube shrinking devices are used to process large-diameter metal tubes into smaller-diameter tubes. Typically, tube shrinking devices have a roller pressing mechanism. A traditional roller pressing mechanism usually consists of roller pairs, bearing housings, and a drive unit. The rollers apply radial pressure to the tube to reduce its diameter. During the tube shrinking process, a spraying device is used to spray coolant onto the metal tube. However, after long-term use, the coolant can cause the bearings on the bearing housings to rust, affecting the normal operation of the roller pressing mechanism. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a roller pressing mechanism that can prevent coolant from entering the bearing housing and the interior of the bearing, thus avoiding corrosion of the bearing housing and the interior of the bearing due to moisture in the coolant.

[0004] This utility model also proposes a tube shrinking device having the above-mentioned roller pressing mechanism.

[0005] A rolling mechanism according to a first aspect of the present invention includes a roller pair, a first support box, and a second support box. One end of the roller pair is mounted in the first support box, and the other end of the roller pair is mounted in the second support box. The roller pair includes two inclined roller shafts arranged parallel to each other. Each roller shaft is equipped with a roller wheel for rolling a round steel pipe. The first support box includes a first housing, a first thrust bearing mounted on the side wall of the first housing, and a first sealing ring fitted on the radial outer surface of the first thrust bearing. The first thrust bearing is located near the first housing. On one side of the roller, the roller shaft is coaxially connected to the first thrust bearing and disposed near the top end of the roller shaft; the second support box includes a second housing, a second thrust bearing installed on the side wall of the second housing, and a second sealing ring fitted on the radial outer surface of the second thrust bearing. The second thrust bearing is located on the side of the second housing near the roller, and the roller shaft is coaxially connected to the second thrust bearing and disposed near the bottom end of the roller shaft; wherein, the roller shaft is fitted with a sealing sleeve, the sealing sleeve is located on the side of the roller near the second thrust bearing, and the sealing sleeve abuts against the side wall of the second housing.

[0006] According to a first aspect of the present invention, a roller pressing mechanism is provided on the end face of the sealing sleeve, the convex ring being used to slide against the side wall of the second housing.

[0007] According to a first aspect embodiment of the present invention, a roller pressing mechanism is provided with an end face lip on the side of the second sealing ring near the sealing sleeve, and the end face lip abuts against the inner side of the convex ring.

[0008] According to a first aspect of the present invention, in a roller pressing mechanism, the sealing sleeve is made of Teflon.

[0009] According to a first aspect embodiment of the present invention, a roller pressing mechanism is provided with a first bushing and a second bushing coaxially rotatably mounted on the roller shaft. The first bushing is installed inside the first housing, and the second bushing is installed inside the second housing.

[0010] According to a first aspect embodiment of the present invention, a roller pressing mechanism has oil injection holes at both ends of the roller shaft and a plurality of oil outlet holes communicating with the oil injection holes. The oil injection holes extend along the axial direction of the roller shaft, and the oil outlet holes at both ends of the roller shaft are respectively connected to the interior of the first bushing and the interior of the second bushing.

[0011] According to a first aspect of the present invention, a roller pressing mechanism further includes two adjusting bolts for adjusting the distance between the two rollers. The two adjusting bolts are rotatably disposed in the first housing and the second housing, respectively. The first housing and the second housing are provided with guide channels and movable seats that can move along the guide channels. The movable seats are rotatably connected to one of the two rollers and are threadedly connected to the adjusting bolts.

[0012] According to a first aspect embodiment of the present invention, a roller pressing mechanism is provided in which the first housing is provided with a through hole and a rubber plug that matches the through hole, the through hole being disposed near the top end of the roller shaft.

[0013] According to a first aspect embodiment of the present invention, a roller pressing mechanism is provided with a connecting shaft portion coaxially at the bottom end of the roller shaft, the connecting shaft portion being used for transmission connection with an external power source.

[0014] A tube shrinking device according to a second aspect of the present invention includes a roller pressing mechanism as described in any one of the above claims.

[0015] The roller pressing mechanism and tube shrinking device according to an embodiment of the present utility model have at least the following beneficial effects: 1. This utility model, by setting a first housing, a first thrust bearing, and a first sealing ring, and then by setting a second housing, a second thrust bearing, and a second sealing ring, supports the roller shaft. When the roller presses the round tube, it generates axial force. The first and second thrust bearings respectively bear the load at the top and bottom of the roller shaft, avoiding significant wear on the first and second support housings. In addition, by fitting the first sealing ring and the second sealing ring on the radial outer surface of the first thrust bearing, moisture from the coolant is prevented from entering the interior of the thrust bearing radially, which could cause rust in the internal structure of the thrust bearing. It also prevents coolant from entering the support housing axially along the roller shaft, thus preventing water accumulation inside the support housing.

[0016] 2. By setting a sealing sleeve, which is tightly fitted to the roller shaft and can rotate with the roller shaft, the sealing sleeve can prevent coolant from entering the second support box through the gap between the roller shaft and the second thrust bearing. Furthermore, by using the sealing sleeve to abut against the side wall of the second box, coolant is prevented from entering the second support box through the gap between the second support box and the second sealing ring, thereby greatly improving the waterproof performance of the support box.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a roller pressing mechanism according to an embodiment of the present utility model; Figure 2 for Figure 1 A cross-sectional view of a roller pressing mechanism and a tube shrinking device is shown. Figure 3 for Figure 2 The diagram shows the structure of a sealing sleeve and a second sealing ring in a roller pressing mechanism. Figure 4 This is a schematic diagram of the structure of a tube shrinking device according to an embodiment of the present utility model.

[0020] Reference numerals: 100-roller pair, 110-first support box, 120-second support box, 130-roller shaft, 140-roller wheel, 150-first housing, 160-first thrust bearing, 170-first sealing ring, 180-second housing, 190-second thrust bearing, 200-second sealing ring, 210-sealing sleeve, 220-convex ring, 230-end lip, 240-first bushing, 250-second bushing, 260-oil injection hole, 270-oil outlet hole, 280-adjusting bolt, 290-guide channel, 300-moving seat, 310-rubber plug, 320-connecting shaft. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The following description, in conjunction with the accompanying drawings, describes a roller pressing mechanism and a tube shrinking device according to an embodiment of the present invention.

[0026] Reference Figure 1The present invention aims to provide an embodiment of a roller pressing mechanism and a tube shrinking device.

[0027] In this embodiment, a tube shrinking device is described, with reference to... Figure 4 and Figure 1 The invention includes a roller pressing mechanism, which is arranged in multiple ways along the moving path of the round tube. The roller pressing mechanisms are inclined, and the angle formed by adjacent roller pressing mechanisms and the vertical plane can be 45°. With this arrangement, the roller pressing mechanism is subjected to relatively balanced force, and the torque in all directions is the same. This is suitable for processing large-diameter tubes and ensures that the cylindricity of the shrunken round tube is accurate and the deformation is small.

[0028] A roller pressing mechanism according to an embodiment of this utility model, referring to... Figure 1 and Figure 2 It includes a roller pair 100, a first support box 110 and a second support box 120. The first support box 110 is installed at one end of the roller pair 100 and the second support box 120 is installed at the other end of the roller pair 100.

[0029] The roller pair 100 includes two inclined roller shafts 130, which are arranged in parallel and opposite to each other. The two roller shafts 130 are equipped with roller wheels 140, which are used to roll and press round steel pipes.

[0030] Among them, reference Figure 2 The first support box 110 includes a first box body 150, a first thrust bearing 160 installed on the side wall of the first box body 150, and a first sealing ring 170 fitted on the radial outer surface of the first thrust bearing 160. The first thrust bearing 160 is located on the side of the first box body 150 near the roller 140. The roller shaft 130 is coaxially connected to the first thrust bearing 160 and is located near the top end of the roller shaft 130.

[0031] Among them, reference Figure 2 The second support box 120 includes a second box body 180, a second thrust bearing 190 installed on the side wall of the second box body 180, and a second sealing ring 200 fitted on the radial outer surface of the second thrust bearing 190. The second thrust bearing 190 is located on the side of the second box body 180 near the roller 140. The roller shaft 130 is coaxially connected to the second thrust bearing 190 and is located near the bottom end of the roller shaft 130.

[0032] It should be noted that the side wall of the first housing 150 is provided with a first mounting hole, which accommodates the radial outer surface of the first thrust bearing 160, and the side wall of the second housing 180 is provided with a second mounting hole, which accommodates the radial outer surface of the second sealing ring 200.

[0033] Furthermore, referring to Figure 2The roller 130 is fitted with a sealing sleeve 210, which is located on the side of the roller 140 near the second thrust bearing 190. The sealing sleeve 210 abuts against the side wall of the second housing 180.

[0034] It is understood that this embodiment, by setting a first housing 150, a first thrust bearing 160, and a first sealing ring 170, and then by setting a second housing 180, a second thrust bearing 190, and a second sealing ring 200, the first thrust bearing 160 and the second thrust bearing 190 support the roller shaft 130. When the roller 140 rolls the round tube, it will generate axial force. The first thrust bearing 160 and the second thrust bearing 190 respectively bear the load at the top and bottom of the roller shaft 130, avoiding large wear on the first support housing 110 and the second support housing 120. In addition, by fitting the first sealing ring 170 on the radial outer surface of the first thrust bearing 160 and the second sealing ring 200 on the radial outer surface of the second thrust bearing 190, it is prevented that water from the coolant enters the interior of the thrust bearing from the radial direction, causing the internal structure of the thrust bearing to rust. It also prevents the coolant from entering the support housing along the axial direction of the roller shaft 130, thus preventing water accumulation inside the support housing.

[0035] Furthermore, in this embodiment, by setting a sealing sleeve 210, which is tightly fitted with the roller shaft 130, the sealing sleeve 210 can rotate with the roller shaft 130. The sealing sleeve 210 can prevent coolant from entering the interior of the second support box 120 along the gap between the roller shaft 130 and the second thrust bearing 190. In addition, by using the sealing sleeve 210 to abut against the side wall of the second box 180, coolant is prevented from entering the interior of the second support box 120 along the gap between the second support box 120 and the second sealing ring 200, thereby greatly improving the waterproof performance of the support box.

[0036] In some embodiments of this utility model, reference is made to Figure 2 and Figure 3 The end face of the sealing sleeve 210 is provided with a protruding ring 220, which is used to slide against the side wall of the second housing 180.

[0037] Understandably, the dynamic sliding contact between the convex ring 220 and the side wall of the second housing 180 enhances the blocking effect against splashing coolant, greatly reduces the contact between the second sealing ring 200 and the coolant, prevents the coolant from corroding the second sealing ring 200, improves the service life of the second sealing ring 200, and prevents coolant from entering the interior of the second support housing 120 along the gap between the second support housing 120 and the second sealing ring 200.

[0038] In addition, the small contact area between the convex ring 220 and the side wall of the second housing 180 greatly reduces the friction between them.

[0039] In some embodiments of this utility model, reference is made to Figure 2 and Figure 3 The second sealing ring 200 is provided with an end face lip 230 on the side near the sealing sleeve 210, and the end face lip 230 abuts against the inner side of the convex ring 220.

[0040] Understandably, since the second thrust bearing 190 is located at the bottom end of the roller 130, and the coolant flows downward along the roller 130, the second thrust bearing 190 is more likely to come into contact with the coolant. In this embodiment, the inner side of the convex ring 220 abuts against the end face lip 230, so that a sealing cavity is formed between the second sealing ring 200 and the sealing sleeve 210. The second thrust bearing 190 is located in the sealing cavity, which avoids the second thrust bearing 190 from being corroded by the coolant and causing rust, thereby improving the service life of the second thrust bearing 190.

[0041] Since the sealing sleeve 210 and the sidewall of the second housing 180 slide relative to each other, in some embodiments of this utility model, the sealing sleeve 210 is made of Teflon. Teflon has an extremely low coefficient of friction and self-lubricating properties, which reduces frictional loss between the sealing sleeve 210 and the housing and extends its service life. In addition, its corrosion resistance and high temperature resistance make it suitable for the chemical corrosion of coolant and the thermal environment of the rolling process.

[0042] In some embodiments of this utility model, the roller 130 is coaxially rotatably provided with a first bushing 240 and a second bushing 250. The first bushing 240 is installed inside the first housing 150, and the second bushing 250 is installed inside the second housing 180.

[0043] It is understood that in this embodiment, by setting a first bushing 240 and a second bushing 250, the first bushing 240 and the second bushing 250 provide radial support, share the radial load of the roller shaft 130, reduce the pressure on the thrust bearing, and reduce the wear of the thrust bearing.

[0044] In addition, the first bushing 240 is installed inside the first housing 150, and the second bushing 250 is installed inside the second housing 180. The interiors of the first housing 150 and the second housing 180 are sealed, limiting the possibility of coolant intruding into the areas of the first bushing 240 and the second bushing 250.

[0045] In some embodiments of this utility model, the roller shaft 130 has an oil injection hole 260 at both ends and a plurality of oil outlet holes 270 communicating with the oil injection hole 260. The oil injection hole 260 extends along the axial direction of the roller shaft 130, and the oil outlet holes 270 at both ends of the roller shaft 130 are respectively connected to the interior of the first bushing 240 and the interior of the second bushing 250.

[0046] It is understandable that lubricating oil can enter the interior of the first bushing 240 and the second bushing 250 through the oil injection hole 260 and the oil outlet hole 270, so that the lubricating oil can also enter the interior of the first housing 150 and the second housing 180, ensuring continuous lubrication of the bearing and bushing, reducing direct metal-to-metal friction, and reducing the risk of wear.

[0047] In addition, the oil injection hole 260 extends axially along the roller shaft 130, which facilitates rapid oil injection by an external oil gun, simplifies maintenance operations, and improves lubrication efficiency.

[0048] In some embodiments of this utility model, reference is made to Figure 2 It also includes two adjusting bolts 280, which are used to adjust the distance between the two rollers 130. The two adjusting bolts 280 are respectively rotatably mounted on the first housing 150 and the second housing 180. The first housing 150 and the second housing 180 are provided with guide channels 290 and movable seats 300 that can move along the guide channels 290. The movable seats 300 are rotatably connected to one of the two rollers 130, and the movable seats 300 are threadedly connected to the adjusting bolts 280.

[0049] It should be noted that there is a gap between the second mounting hole of the second housing 180 and the radial outer surface of the second sealing ring 200.

[0050] Understandably, adjusting bolt 280 rotates to move moving seat 300 along guide rail, thereby achieving precise control of roller spacing 130, adapting to the processing requirements of different pipe diameters, improving equipment versatility, and the guide rail 290 constrains the movement trajectory of moving seat 300 to ensure that roller 130 moves in parallel, avoiding uneven pipe forming caused by skewness.

[0051] In addition, during the movement of the roller 130, the sealing sleeve 210 can move with the roller 130. The sealing sleeve 210 can seal the gap between the second sealing ring 200 and the second mounting hole of the second housing 180 to prevent coolant from entering the interior of the second housing 180.

[0052] In some embodiments of this utility model, the first housing 150 is provided with a through hole and a rubber plug 310 that matches the through hole. The through hole is located near the top of the roller 130. It can be understood that the through hole facilitates quick oil injection by an external oil gun, and the rubber plug 310 facilitates blocking the through hole to ensure that the inside of the first housing 150 is sealed.

[0053] In some embodiments of this utility model, a connecting shaft portion 320 is coaxially provided at the bottom end of the roller 130. The connecting shaft portion 320 is used for transmission connection with an external power source, which facilitates docking with the power source and simplifies the assembly process of the power input end.

[0054] In the description of this specification, the references to terms such as "an embodiment, some embodiments, illustrative embodiments, example, specific example, or examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A roller pressing mechanism, characterized in that, It includes a roller pair (100), a first support box (110) and a second support box (120), wherein the first support box (110) is installed at one end of the roller pair (100) and the second support box (120) is installed at the other end of the roller pair (100); The roller pair (100) includes two inclined roller shafts (130), which are arranged in parallel opposite directions. Each roller shaft (130) is provided with a roller wheel (140) for rolling round steel pipes. The first support box (110) includes a first box body (150), a first thrust bearing (160) installed on the side wall of the first box body (150), and a first sealing ring (170) fitted on the radial outer surface of the first thrust bearing (160). The first thrust bearing (160) is located on the side of the first box body (150) near the roller (140). The roller shaft (130) is coaxially connected to the first thrust bearing (160) and is disposed near the top end of the roller shaft (130). The second support box (120) includes a second box body (180), a second thrust bearing (190) installed on the side wall of the second box body (180), and a second sealing ring (200) fitted on the radial outer surface of the second thrust bearing (190). The second thrust bearing (190) is located on the side of the second box body (180) near the roller (140). The roller shaft (130) is coaxially connected to the second thrust bearing (190) and is located near the bottom end of the roller shaft (130). The roller (130) is fitted with a sealing sleeve (210), which is located on the side of the roller (140) near the second thrust bearing (190) and abuts against the side wall of the second housing (180).

2. The roller pressing mechanism according to claim 1, characterized in that, The end face of the sealing sleeve (210) is provided with a protruding ring (220), which is used to slide against the side wall of the second housing (180).

3. The roller pressing mechanism according to claim 2, characterized in that, The second sealing ring (200) has an end face lip (230) on the side near the sealing sleeve (210), and the end face lip (230) abuts against the inner side of the convex ring (220).

4. The roller pressing mechanism according to claim 1, characterized in that, The sealing sleeve (210) is made of Teflon.

5. A roller pressing mechanism according to claim 1, characterized in that, The roller (130) is coaxially rotatably provided with a first bushing (240) and a second bushing (250). The first bushing (240) is installed inside the first housing (150), and the second bushing (250) is installed inside the second housing (180).

6. A roller pressing mechanism according to claim 5, characterized in that, The roller (130) has an oil injection hole (260) at both ends and a plurality of oil outlet holes (270) communicating with the oil injection hole (260). The oil injection hole (260) extends along the axial direction of the roller (130). The oil outlet holes (270) at both ends of the roller (130) are respectively connected to the interior of the first bushing (240) and the interior of the second bushing (250).

7. A roller pressing mechanism according to claim 1, characterized in that, It also includes two adjusting bolts (280) for adjusting the distance between the two rollers (130). The two adjusting bolts (280) are rotatably disposed in the first housing (150) and the second housing (180), respectively. The first housing (150) and the second housing (180) are provided with guide channels (290) and movable seats (300) that can move along the guide channels (290). The movable seats (300) are rotatably connected to one of the two rollers (130) and are threadedly connected to the adjusting bolts (280).

8. A roller pressing mechanism according to claim 1, characterized in that, The first housing (150) is provided with a through hole and a rubber plug (310) that matches the through hole, the through hole being located near the top of the roller (130).

9. A roller pressing mechanism according to claim 1, characterized in that, The bottom end of the roller (130) is coaxially provided with a connecting shaft (320), which is used for transmission connection with an external power source.

10. A tube shrinking device, characterized in that, The invention includes a roller pressing mechanism as described in any one of claims 1 to 9.

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