Rolling production equipment for medium-voltage fire-resistant cable production and production method

Abstract

The invention relates to the technical field of medium-voltage fire-resistant cable production equipment, and discloses rolling production equipment for medium-voltage fire-resistant cable production and a production method.The rolling production equipment for medium-voltage fire-resistant cable production comprises two axial distance adjusting mechanisms and two rolling type rolling mechanisms, and the rolling type rolling mechanisms are arranged in the rolling type rolling production equipment and can rotate along with a threading hollow pipe; and the rolling wheel has an extrusion type rolling function on the cable. According to the rolling production equipment for medium-voltage fire-resistant cable production and the production method, two symmetrically-arranged rolling wheels are used for rolling a cable, the cable is in a one-way linear motion state, and the two rolling wheels can roll the cable in a circular motion mode, so that the cable can be rolled in a spiral progressive mode, and the production efficiency is improved. And therefore, the working phenomenon of extrusion dead angles formed by symmetrical rolling is reduced, and the rolling effect on the cable is improved.

Description

Technical Field

[0001] The invention relates to the technical field of medium-voltage fire-resistant cable production equipment, and in particular to a rolling production equipment and a production method for medium-voltage fire-resistant cables. Background Art

[0002] During the production of medium-voltage fire-resistant cables, the conductor raw materials are drawn into monofilaments of the required specifications through the die holes of the wire drawing machine, and multiple monofilaments are twisted together to form a wire core that meets the requirements. The prepared wire core is then passed through an extruder to allow the insulation layer to wrap around the wire core to complete the production of the cable. After the wire core passes through the extruder, the cable needs to be rolled to ensure that the wire core of the cable fits tightly with the insulation layer, reduce air gaps and protrusions, enhance the structural stability and reliability of the cable, and improve the electrical performance and service life of the cable. The rolling equipment used in current cable production is usually a single rolling process, that is, a pair of rollers are used to roll the cable surface. Because the rolling contact area with the cable is limited, the rolling effect is not good. By increasing the number of rolling wheels, the rolling area with the cable is increased, and the rolling effect is improved. However, due to the increase in the number of rolling wheels, the cable threading operation is inconvenient.

[0003] To this end, a Chinese patent with publication number "CN118173327A" announced "rolling production equipment for cable production", whose main structure includes a cross-shaped casing, in which a vertical roller pressing wheel group and a horizontal roller pressing wheel group are arranged, the vertical roller pressing wheel group is symmetrically distributed at the front and rear ends of the casing, and the horizontal roller pressing wheel group is evenly distributed between the vertical roller pressing wheel groups; the front and rear ends of the casing are connected with sleeves, and the sleeves are in the same straight line as the horizontal roller pressing wheel group and the vertical roller pressing wheel group; the two ends of the diaphragm pass through the vertical roller pressing wheel group and the horizontal roller pressing wheel group, and are connected with the sleeves respectively; the sleeves protrude outward from the outer wall of the casing, and are coaxially connected with a conical cleaning tube, the diameter of the cleaning tube on the side away from the casing is larger than the diameter of the other side, and a cleaning component is arranged in the cleaning tube. The cable production rolling production equipment uses vertical rolling wheel groups and horizontal rolling wheel groups to perform multiple closed rolling on the cable after the cable is passed into the casing, thereby improving the rolling effect and rolling quality.

[0004] However, in actual operation, the cable is rolled multiple times using the vertical roller group and the horizontal roller group. However, the vertical roller group and the horizontal roller group can only be kept in one position for rolling, which will lead to the existence of rolling dead angles or the occurrence of extrusion dead angles caused by symmetrical rolling. Therefore, the rolling effect is relatively poor. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a rolling production equipment and a production method for medium-voltage fire-resistant cables, which utilizes two symmetrically arranged rolling wheels to roll the cable line. The cable line is in a unidirectional linear motion state, and the two rolling wheels can perform circular motion rolling on the cable line, so that the cable line can be rolled in a spiral progressive manner, thereby reducing the occurrence of the working phenomenon of extrusion dead corners formed by symmetrical rolling, thereby improving the rolling effect on the cable line and solving the above-mentioned technical problems.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rolling production equipment for medium-voltage fire-resistant cable production, comprising a supporting base with a No. 1 shaft body mounting hole provided in the top area, a threading hollow tube installed in the No. 1 shaft body mounting hole through a bearing, a pulley fixedly installed at one end of the threading hollow tube, a No. 1 fixing sleeve installed at the other end of the threading hollow tube, two component docking ends symmetrically arranged on the outer circumferential surface of the No. 1 fixing sleeve, and a lead-in hole arranged at the center of the threading hollow tube and open at both ends, and also comprising two axial spacing adjustment mechanisms, wherein a cylindrical hollow shell with a hollow structure fixedly installed at the component docking end is provided inside, an inner movable block placed inside the cylindrical hollow shell and capable of axially moving along the cylindrical hollow shell, and an outer threaded rod installed in the cylindrical hollow shell and capable of driving the inner movable block to move when rotating; and two rolling rolling mechanisms, wherein a rolling wheel which can rotate with the threading hollow tube and can perform an extrusion rolling function on the cable when it contacts the circumferential surface of the cable is provided inside.

[0007] Preferably, the wire threading hollow tube is provided with rounded corner structures at two opening ends located at the wire lead-in hole.

[0008] Preferably, the axial spacing adjustment mechanism comprises a cylindrical hollow shell, one end of the cylindrical hollow shell is provided with a fixed mounting plate with an integral structure therewith and fixedly mounted on the docking end of the component, the cylindrical hollow shell is provided with a component movable cavity inside the cylindrical hollow shell, and the other end of the cylindrical hollow shell is provided with a second shaft body mounting hole connecting the external space and the component movable cavity, the circumferential surface of the cylindrical hollow shell is provided with a strip slide groove connecting the external space and the component movable cavity, the cylindrical hollow shell is provided with an inner movable block capable of axial movement along the component movable cavity inside the component movable cavity, the center of the inner movable block is provided with an internal threaded hole, the cylindrical hollow shell is provided with a rotatable external threaded rod installed inside the component movable cavity and the second shaft body mounting hole through a bearing, the external threaded rod is connected to the inner movable block through a threaded structure at the rod body located inside the component movable cavity, one end of the external threaded rod is fixedly installed with a rotating cap, and the inner movable block is provided with a rod body fixing groove of an inner concave structure on the side facing the strip slide groove.

[0009] Preferably, the structural shape of the cross section of the component movable cavity is consistent with the structural shape of the cross section of the inner movable block, both are polygonal structures, and the structural dimensions of the cross section of the component movable cavity match the structural dimensions of the cross section of the inner movable block.

[0010] Preferably, the threaded structure includes an internal threaded structure arranged in the internal threaded hole and an external threaded structure arranged on the rod body of the external threaded rod, and the internal threaded structure matches the external threaded structure.

[0011] Preferably, the rolling type rolling mechanism includes a No. 1 connecting rod, one end of the No. 1 connecting rod is fixedly installed with a No. 2 fixing sleeve, the circumferential surface of the No. 2 fixing sleeve is fixedly installed with a No. 2 connecting rod, one end of the No. 2 connecting rod passes through the strip slide groove, and the end portion is fixedly installed inside the rod body fixing groove, the other end of the No. 2 connecting rod is fixedly installed with a concave connecting plate, two opposing plates of the concave connecting plate are provided with a No. 3 shaft body mounting hole, the concave connecting plate is provided with a rotatable rotating shaft installed inside the No. 3 shaft body mounting hole through a bearing, and a rolling wheel is fixedly installed in the shaft body of the rotating shaft.

[0012] Preferably, the central axis of the rolling wheel is balanced with the axial centerline of the threading hollow tube.

[0013] Preferably, S: the support base is fixedly installed on the base surface, and a driving motor with a pulley installed on the end of the rotor is used, and the pulleys in the driving motor are linked by a belt; S: the cable to be rolled is passed through the lead-in hole, and then the rotating cap is rotated. Due to the connection relationship of the threaded structure, the inner movable block moves in the direction pointing to the cable until the two rolling wheels are pressed against the outer circumference of the cable; S: the driving motor is turned on, at this time, the belt drives the threading hollow tube to rotate, and due to the fixed connection relationship of the components, it will drive the two rolling wheels to make a circular motion around the cable body, and at the same time, the two rolling wheels will roll on the surface of the cable, thereby rolling the cable at the contact part; S: the linear motion speed of the cable in the lead-in hole can be controlled to roll the entire cable.

[0014] Compared with the prior art, the present invention provides a rolling production equipment and production method for medium voltage fire-resistant cable production, which has the following beneficial effects: The cable is rolled using two symmetrically arranged rolling wheels. The cable is in a unidirectional linear motion state, and the two rolling wheels can perform circular motion rolling on the cable, so that the cable can be rolled in a spiral progressive manner, thereby reducing the occurrence of extrusion dead corners caused by symmetrical rolling, thereby improving the rolling effect on the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A perspective view of the present invention; Figure 2 It is a three-dimensional cross-sectional view of the present invention in the horizontal direction; Figure 3 It is a three-dimensional cross-sectional view of the present invention in the vertical direction; Figure 4 It is a three-dimensional diagram of the axial spacing adjustment mechanism of the present invention; Figure 5 It is a three-dimensional cross-sectional view of the axial spacing adjustment mechanism of the present invention; Figure 6 It is a three-dimensional diagram of the rolling roller pressing mechanism in the present invention.

[0016] Among them: 1. Support base; 2. No. 1 shaft mounting hole; 3. Threading hollow tube; 4. Pulley; 5. No. 1 fixing sleeve; 6. Component docking end; 7. Lead hole; 8. Chamfered corner structure; 9. Axial spacing adjustment mechanism; 91. Columnar hollow shell; 92. Fixed mounting plate; 93. Component movable cavity; 94. No. 2 shaft mounting hole; 95. Strip slide groove; 96. Inner movable block; 97. Internal threaded hole; 98. Rod fixing groove; 99. External threaded rod; 910. Rotating cap; 10. Rolling roller mechanism; 101. No. 1 connecting rod; 102. No. 2 fixing sleeve; 103. No. 2 connecting rod; 104. Concave connecting plate; 105. No. 3 shaft mounting hole; 106. Rotating shaft; 107. Rolling wheel. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 , Figure 2 and Figure 3A rolling production equipment for medium-voltage fire-resistant cable production, including a support base 1 with a No. 1 shaft mounting hole 2 provided in the top area, a threading hollow tube 3 installed in the No. 1 shaft mounting hole 2 through a bearing, a pulley 4 fixedly installed at one end of the threading hollow tube 3, a No. 1 fixing sleeve 5 installed at the other end of the threading hollow tube 3, two component docking ends 6 symmetrically arranged on the outer circumference of the No. 1 fixing sleeve 5 and a lead-in hole 7 arranged at the center of the threading hollow tube 3 and open at both ends. In order to reduce the damage of the edges and corners to the cable, it is necessary to provide the threading hollow tube 3 with a chamfered structure 8 at the two open ends located at the lead-in hole 7, fix the support base 1 on the base surface, and use a driving motor with a pulley installed at the end of the rotor, and use a belt to link the pulley in the driving motor and the pulley 4 to pass the cable to be rolled through the lead-in hole 7.

[0019] To be able to roll cables of different diameters, see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , it is necessary to set up two axial spacing adjustment mechanisms 9, which are provided with a cylindrical hollow shell 91 fixedly installed on the component docking end 6 and with a hollow structure inside, an inner movable block 96 placed inside the cylindrical hollow shell 91 and capable of axially moving along the cylindrical hollow shell 91, and an outer threaded rod 99 installed in the cylindrical hollow shell 91 and capable of driving the inner movable block 96 to move when rotating. Directional rotation of the rotating cap 910 will drive the outer threaded rod 99 to rotate in a directional manner. Due to the connection relationship of the threaded structure, the inner movable block 96 will move in a directional manner, thereby driving the rolling wheel 107 to move in a directional manner, changing the distance between the rolling wheel 107 and the cable, so that cables with different diameters can be rolled.

[0020] For the specific structure of the axial spacing adjustment mechanism 9, please refer to Figure 4 and Figure 5, including a cylindrical hollow shell 91, one end of the cylindrical hollow shell 91 is provided with a fixed mounting plate 92 which is an integral structure with it and fixedly mounted on the component docking end 6, the interior of the cylindrical hollow shell 91 is provided with a component movable cavity 93, the other end of the cylindrical hollow shell 91 is provided with a second shaft mounting hole 94 which connects the external space and the component movable cavity 93, the circumferential surface of the cylindrical hollow shell 91 is provided with a strip-shaped slide groove 95 which connects the external space and the component movable cavity 93, the cylindrical hollow shell 91 is provided with an inner movable block 96 which can move axially along the component movable cavity 93, in order to prevent relative rotation between the components, it is necessary to make the structural shape of the cross section of the component movable cavity 93 consistent with the structural shape of the cross section of the inner movable block 96, both of which are polygonal structures The structure of the movable cavity 93 of the component matches the structure of the cross-section of the inner movable block 96. An internal threaded hole 97 is arranged at the center of the inner movable block 96. The cylindrical hollow shell 91 is provided with a rotatable external threaded rod 99 through a bearing inside the movable cavity 93 of the component and the second shaft mounting hole 94. The external threaded rod 99 is connected to the inner movable block 96 through a threaded structure at the rod body inside the movable cavity 93 of the component. Specifically, the threaded structure includes an internal threaded structure arranged in the internal threaded hole 97 and an external threaded structure arranged on the rod body of the external threaded rod 99, and the internal threaded structure matches the external threaded structure. A rotating cap 910 is fixedly installed at one end of the external threaded rod 99. The inner movable block 96 is provided with a rod body fixing groove 98 with an inner concave structure on the side facing the strip-shaped slide groove 95.

[0021] To achieve the roller pressing work in the form of rotation and revolution, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 6 , it is necessary to set up two rolling roller pressing mechanisms 10, inside which are provided roller pressing wheels 107 that can rotate with the threading hollow tube 3 and can perform an extrusion rolling function on the cable when it contacts the circumferential surface of the cable. When the roller pressing wheels 107 rotate with the threading hollow tube 3, the roller pressing wheels 107 will revolve, and at the same time, the two roller pressing wheels 107 will roll on the surface of the cable, thereby rolling the cable at the contact position.

[0022] For the specific structure of the rolling roller pressing mechanism 10, please refer to Figure 6, including a No. 1 connecting rod 101, one end of the No. 1 connecting rod 101 is fixedly installed with a No. 2 fixing sleeve 102, the circumferential surface of the No. 2 fixing sleeve 102 is fixedly installed with a No. 2 connecting rod 103, one end of the No. 2 connecting rod 103 passes through the strip slide groove 95, and the end is fixedly installed inside the rod body fixing groove 98, the other end of the No. 2 connecting rod 103 is fixedly installed with a concave connecting plate 104, and a No. 3 shaft body mounting hole 105 is provided in two opposing plates of the concave connecting plate 104, and the concave connecting plate 104 is provided with a rotatable rotating shaft 106 installed inside the No. 3 shaft body mounting hole 105 through a bearing, and a roller wheel 107 is fixedly installed in the shaft body of the rotating shaft 106, and the central axis of the roller wheel 107 is balanced with the axial center line of the threading hollow tube 3.

[0023] When in use, follow the following steps: S1: fix the support base 1 on the base surface, and use a drive motor with a pulley installed on the end of the rotor, and link the pulley in the drive motor and the pulley 4 through a belt; S2: pass the cable to be rolled through the lead hole 7, and then rotate the rotating cap 910. Due to the connection relationship of the threaded structure, the inner movable block 96 moves in the direction pointing to the cable until the two rolling wheels 107 are pressed against the outer circumference of the cable; S3: turn on the drive motor. At this time, the belt drives the threading hollow tube 3 to rotate. Due to the fixed connection relationship of the components, the two rolling wheels 107 will be driven to make a circular motion around the cable body. At the same time, the two rolling wheels 107 will roll on the surface of the cable, thereby rolling the cable at the contact part; S4: control the linear motion speed of the cable in the lead hole 7, so that the entire cable can be rolled.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rolling production equipment for producing medium-voltage fire-resistant cables, comprising a support base (1) having a No. 1 shaft body mounting hole (2) arranged in the top area, a threading hollow tube (3) mounted in the No. 1 shaft body mounting hole (2) through a bearing, a pulley (4) fixedly mounted on one end of the threading hollow tube (3), a No. 1 fixing sleeve (5) mounted on the other end of the threading hollow tube (3), two component butt ends (6) symmetrically arranged on the outer circumference of the No. 1 fixing sleeve (5), and a lead-in hole (7) arranged at the center of the threading hollow tube (3) and with both ends in an open state, characterized in that: Also includes, Two axial spacing adjustment mechanisms (9), each of which is provided with a columnar hollow outer shell (91) fixedly mounted on the component butt end (6) and having a hollow structure inside, an inner movable block (96) placed inside the columnar hollow outer shell (91) and capable of moving axially along the columnar hollow outer shell (91), and an outer threaded rod (99) mounted in the columnar hollow outer shell (91) and capable of driving the inner movable block (96) to move when rotating; and two rolling-type rolling mechanisms (10), inside which rolling wheels (107) are arranged which can rotate with the threading hollow tube (3) and can perform an extrusion-type rolling function on the cable when contacting the circumferential surface of the cable.

2. The rolling production equipment for producing medium voltage fire-resistant cables according to claim 1, characterized in that: The wire threading hollow tube (3) is provided with rounded corner structures (8) at two opening ends located at the wire lead-in hole (7).

3. The rolling production equipment for producing medium voltage fire-resistant cables according to claim 2, characterized in that: The axial spacing adjustment mechanism (9) comprises a cylindrical hollow shell (91), one end of the cylindrical hollow shell (91) is provided with a fixed mounting plate (92) which is an integral structure with the cylindrical hollow shell (91) and fixedly mounted on the component docking end (6), the interior of the cylindrical hollow shell (91) is provided with a component movable cavity (93), the interior of the other end of the cylindrical hollow shell (91) is provided with a second shaft body mounting hole (94) which communicates with the external space and the component movable cavity (93), the circumferential surface of the cylindrical hollow shell (91) is provided with a strip-shaped slide groove (95) which communicates with the external space and the component movable cavity (93), and the cylindrical hollow shell (91) is arranged inside the component movable cavity (93). An inner movable block (96) is provided which can move axially along the component movable cavity (93); an inner threaded hole (97) is provided at the center of the inner movable block (96); a rotatable outer threaded rod (99) is installed in the columnar hollow housing (91) via a bearing inside the component movable cavity (93) and the second shaft body mounting hole (94); the outer threaded rod (99) is connected to the inner movable block (96) via a threaded structure at a rod body located inside the component movable cavity (93); a rotating cap (910) is fixedly installed at one end of the outer threaded rod (99); and a rod body fixing groove (98) with an inner concave structure is provided on the side of the inner movable block (96) facing the strip-shaped slide groove (95).

4. The rolling production equipment for producing medium voltage fire-resistant cables according to claim 3, characterized in that: The structural shape of the cross section of the component movable cavity (93) is consistent with the structural shape of the cross section of the inner movable block (96), both are polygonal structures, and the structural dimensions of the cross section of the component movable cavity (93) match the structural dimensions of the cross section of the inner movable block (96).

5. The rolling production equipment for producing medium voltage fire-resistant cables according to claim 4, characterized in that: The thread structure comprises an internal thread structure arranged in the internal thread hole (97) and an external thread structure arranged on the rod body of the external thread rod (99), and the internal thread structure matches the external thread structure.

6. The rolling production equipment for producing medium voltage fire-resistant cables according to claim 5, characterized in that: The rolling roller pressing mechanism (10) comprises a No. 1 connecting rod (101), a No. 2 fixing sleeve (102) being fixedly mounted on one end of the No. 1 connecting rod (101), a No. 2 connecting rod (103) being fixedly mounted on the circumferential surface of the No. 2 fixing sleeve (102), one end of the No. 2 connecting rod (103) passing through the strip-shaped slide groove (95), and the end portion being fixedly mounted inside the rod body fixing groove (98), and a concave connecting plate (104) being fixedly mounted on the other end of the No. 2 connecting rod (103), a No. 3 shaft body mounting hole (105) being provided in two opposing plates of the concave connecting plate (104), a rotatable rotating shaft (106) being mounted inside the No. 3 shaft body mounting hole (105) via a bearing on the concave connecting plate (104), and a roller pressing wheel (107) being fixedly mounted in the shaft body of the rotating shaft (106).

7. The rolling production equipment for producing medium voltage fire-resistant cables according to claim 6, characterized in that: The central axis of the rolling wheel (107) is balanced with the axial center line of the threading hollow tube (3).

8. A production method of a rolling production equipment for producing a medium voltage fire-resistant cable according to claim 7, characterized in that: The following steps are included: S1: The support base (1) is fixedly mounted on the base surface, and a driving motor with a pulley mounted on the end of the rotor is used, and the pulley in the driving motor and the pulley (4) are linked by a belt; S2: The cable to be rolled is passed through the lead hole (7), and then the rotating cap (910) is rotated. Due to the connection relationship of the threaded structure, the inner movable block (96) moves in the direction pointing to the cable until the two rolling wheels (107) contact and squeeze the outer circumference of the cable; S3: Turn on the drive motor. At this time, the belt drives the threading hollow tube (3) to rotate. Due to the fixed connection relationship between the components, the two rollers (107) are driven to make a circular motion around the cable body. At the same time, the two rollers (107) roll on the surface of the cable, thereby rolling the cable at the contact part; S4: The linear movement speed of the cable in the lead-in hole (7) is controlled so that the entire cable can be rolled.

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