Small hot-rolled seamless steel pipe perforating machine and working method thereof

Abstract

The invention belongs to the technical field of hot-rolled seamless steel pipe production equipment, and particularly belongs to a small hot-rolled seamless steel pipe perforating machine and a working method thereof.The small hot-rolled seamless steel pipe perforating machine comprises a main machine base, a machine cover, a roller assembly and a side press-in assembly; a roller assembly is mounted in the main engine base; the side press-in assemblies are arranged on the two sides of the main engine base; the roller assembly comprises a roller box, a roller is mounted on the inner side of the roller box, and a dovetail groove is formed in the outer side wall of the roller box; the direction of the dovetail groove is consistent with the angle of the roller; the side press-in assembly comprises an adjusting hydraulic motor and a first balance hydraulic cylinder. In the round steel machining process, all gaps are overcome through mechanical structure design, the working intensity of workers is reduced, the steel pipe machining precision is improved, and therefore the steel pipe quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of hot-rolled seamless steel pipe production equipment, and in particular belongs to a small hot-rolled seamless steel pipe punching machine and a working method thereof. Background Art

[0002] In the seamless steel pipe piercing machine, the main machine is the key equipment, and the stability of the equipment is the core factor to ensure the quality and precision of the seamless steel pipe. The upper and lower guide plate supports, the side pressing device of the roller and the guide plate locking device of the existing small seamless steel pipe piercing machine main machine have the "breathing" phenomenon during the production of hot-rolled seamless steel pipes. The general process is as follows:

[0003] Phase 1: Before production, each device is adjusted according to the process to achieve the required parameters. However, at the beginning of production, the heated round steel is suddenly bitten by the roller, causing the upper guide plate to move upward and the roller to move slightly to both sides, resulting in a deviation between the actual parameters and the required process parameters.

[0004] The second stage: During the production process, due to the deviation between the actual process parameters and the theoretical values, the round steel after biting produces irregular swinging, which further causes the guide plate and roller to move;

[0005] The third stage: In the later stage of production, after the round steel is punched into a rough tube and separated from the main punching machine, the upper guide plate and the roller return to the state before production.

[0006] The repetition of this process leads to the occurrence of "gasping" phenomenon, which affects the quality and precision of seamless steel pipes.

[0007] In addition, the various adjustment and locking parts of the existing small seamless steel pipe punching machine main machine are still manually adjusted and tightened by manual knocking and wrench tightening, which has a certain probability of instability, high labor intensity for workers, affects the quality of seamless steel pipes, and reduces precision. Summary of the invention

[0008] The invention provides a small hot-rolled seamless steel pipe punching machine to achieve the purpose of improving the steel pipe precision and reducing labor intensity.

[0009] At the same time, the present invention also provides a working method of the small hot-rolled seamless steel pipe piercing machine.

[0010] A small hot-rolled seamless steel pipe piercing machine comprises a main machine base, a machine cover, a roller assembly and a side pressing assembly;

[0011] On the main engine base, one end of the cover is hingedly connected to the main engine base;

[0012] A roller assembly is installed in the main machine base; side pressing assemblies are arranged on both sides of the main machine base;

[0013] The roll assembly includes a roll box, rolls are installed inside the roll box, and dovetail grooves are provided on the outer wall of the roll box; and the direction of the dovetail grooves is consistent with the angle of the rolls;

[0014] The side pressure feed assembly includes an adjustment hydraulic motor and a balancing hydraulic cylinder. The adjustment hydraulic motor is powered by a turbine reducer. A side pressure feed screw is connected to the turbine reducer. A screw nut is fixed in the main engine seat. The side pressure feed screw fits in the screw nut. A pull block is connected to the end of the side pressure feed screw. The pull block is installed in the dovetail groove. The end of the balancing hydraulic cylinder is pressed tightly against the outside of the roller box.

[0015] Preferably, a roller upper clamping device is further provided on the upper side of the roller; the roller upper clamping device includes a clamping hydraulic cylinder, a push rod, a positioning key, a slider support, a wedge block, a lower pressure block, a return spring, and a slide plate;

[0016] The clamping hydraulic cylinder is installed on the machine cover, and the protruding end is deep into the machine cover and connected with a push rod. The pin at the end of the push rod is connected with a wedge block. The upper side of the wedge block is installed in the slider support, and the lower side of the wedge block contacts the lower pressure block. A protrusion protrudes from the lower side of the lower pressure block. A through hole is opened on the slide plate, and the protrusion fits in the through hole. A return spring is installed between the slide plate and the lower pressure block.

[0017] The slide block support and the machine cover are respectively provided with key slots, and the positioning keys are installed in the key slots; the slide block is fixed to the machine cover by bolts through the positioning keys.

[0018] Preferably, the roller upper clamping device is provided at two locations on each roller box.

[0019] Preferably, the small hot-rolled seamless steel pipe piercing machine further comprises a lower guide plate support assembly; the lower guide plate support assembly is installed on the main frame, and both sides of the lower guide plate support assembly are installed as roller assemblies in the main frame;

[0020] The lower guide plate support assembly includes a lower guide plate, a lower guide plate seat, an inlet guide sleeve, and an inlet guide sleeve locking cylinder;

[0021] The guide plate seat is fixed on the main machine seat; the lower guide plate and the inlet guide sleeve are respectively fixed on the lower guide plate seat, and a guide sleeve locking hook is installed at the end of the lower guide plate seat through a pin shaft, and the other end of the guide sleeve locking hook is connected to the inlet guide sleeve locking cylinder, and a fixed arm is formed on the inlet guide sleeve, and the guide sleeve locking hook is engaged with the fixed arm when fixed.

[0022] Preferably, the small hot-rolled seamless steel pipe piercing machine further comprises an upper guide plate support assembly; the upper guide plate support assembly is arranged on the machine cover;

[0023] The upper guide plate support assembly includes an upper guide plate, a support frame, an upper guide plate locking hydraulic cylinder, a second balancing hydraulic cylinder, a second turbine reducer, an upper adjustment screw, a pull rod, and an upper guide plate locking hook;

[0024] A hydraulic motor is installed on the support frame, and the power of the hydraulic motor is connected to the second turbine reducer, and an upper adjustment screw is connected to the second turbine reducer; a screw nut is installed in the machine cover, and the upper adjustment screw is installed on the screw nut;

[0025] The upper guide plate locking hydraulic cylinder is installed on the support frame, and the extended end is deeply inserted into the support frame to connect the pull rod one, and the end of the pull rod one is connected to the upper guide plate locking hook; the upper guide plate is installed on the support frame and locked by the upper guide plate locking hook;

[0026] A second balancing hydraulic cylinder is also arranged on the support frame, and the extended end of the second balancing hydraulic cylinder is against the upper surface of the machine cover;

[0027] The machine cover is provided with an installation opening, and the middle part of the support frame is installed in the installation opening; an inclined surface is arranged outside the corner of the middle part of the support frame to cooperate with the sliding block in the machine cover.

[0028] Preferably, the lower guide plate support assembly further includes a lower guide plate pad; the lower guide plate pad is mounted on the lower guide plate seat; the lower guide plate is mounted on the lower guide plate pad;

[0029] The upper guide plate support assembly also includes an upper guide plate pad, which is installed between the upper guide plate support frame and the upper guide plate.

[0030] Preferably, the machine cover is further provided with an upper guide plate support clamping device, and the structure of the upper guide plate support clamping device is as follows: corresponding to the position of the installation port, a tightening cylinder is provided on the machine cover, the protruding end of the tightening cylinder extends deep into the installation port, and a tightening bevel block is connected to the end; the tightening cylinder is provided at one or more times.

[0031] Preferably, the connection structure of the hood mounted on the main frame includes a hood locking cylinder, an inclined block, an inclined wedge, a second pull rod, a hood opening hydraulic cylinder, a rotating support seat, and a rotating swing arm;

[0032] The hood locking cylinder is installed on the hood, and a wedge is connected to the end thereof; in the locking position, a fastening pad is also provided on the hood, and a pull rod mounting opening and an inclined wedge mounting opening are provided in the fastening pad; the hood opening hydraulic cylinder is installed on the hood, and the end shaft is connected to the main engine base; a rotating swing arm is also fixed to the other end of the hood;

[0033] The main engine seat is provided with a rotating support seat, and the rotating swing arm is installed in the rotating support seat; the main engine seat is also axially connected with a second pull rod, and an installation through hole is opened on the upper part of the second pull rod;

[0034] When locking, the bevel block and the bevel wedge are installed in the installation through hole.

[0035] Preferably, the power between the adjustment hydraulic motor and the turbine reducer 1 and between the hydraulic motor and the turbine reducer 2 is transmitted by chains and sprockets.

[0036] The working method of the above-mentioned small hot-rolled seamless steel pipe piercing machine comprises the following steps:

[0037] Cover locking: Install the tie rod 2 in the tie rod installation port. After the cover locking cylinder pushes the inclined block into the installation through hole, manually install the inclined wedge in the installation through hole.

[0038] According to the process parameters of the steel pipe, adjust the upper guide plate supporter, and the second turbine reducer drives the upper adjustment screw in its screw nut to install the upper guide plate supporter; then the second balancing hydraulic cylinder is tightened on the machine cover; the tightening cylinder is tightened;

[0039] The turbine reducer 1 in the side pressure assembly drives the side pressure screw to press the roll box tightly, and then the balance hydraulic cylinder 1 presses the outside of the roll box again; the roller upper pressing device presses the upper side of the roll box.

[0040] When replacing the roller, loosen the pressure at various places, remove the inclined wedge manually, and then the cover locking cylinder pulls the inclined block out of the installation through hole. Then turn and pull rod 2, and the cover opening hydraulic cylinder automatically opens the cover to replace the roller.

[0041] Beneficial effects of the present invention:

[0042] 1. In the roller assembly, the side pressing assembly and the roller upper clamping device overcome the gap on the side and upper side of the roller respectively to improve the processing accuracy.

[0043] In the lower guide plate support assembly, the lower guide plate, the lower guide plate seat, the inlet guide sleeve, and the inlet guide sleeve locking cylinder are used to fix the lower guide plate in position; in the upper guide plate support assembly, the balance hydraulic cylinder 2 is used to overcome the gap between the upper adjustment screw and the screw nut; the tightening oil cylinder is used to overcome the left and right direction gaps of the inclined surface and the slider after the support frame is installed;

[0044] In addition, the fixing structures of the lower guide plate and the upper guide plate ensure that the lower guide plate and the upper guide plate are fixed without gaps. Compared with the manual positioning in the prior art, the accuracy is higher and the labor intensity of the workers is reduced.

[0045] 2. In the present invention, the hydraulic motor and the turbine reducer are driven by a chain, which is more adaptable to the high temperature, water vapor and dust environment of the main machine than the existing motor and belt drive, and has higher transmission efficiency and lower use cost than the belt.

[0046] 3. The machine cover is opened by hydraulic cylinder automatically, which is convenient for replacing rollers and reduces the labor intensity of workers.

[0047] In summary, in the present invention, during the round steel processing, each gap is overcome by mechanical structure design, which reduces the work intensity of the staff and improves the accuracy of steel pipe processing, thereby improving the quality of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a structural schematic diagram of the present invention;

[0049] Figure 2 It is another perspective structural schematic diagram of the present invention;

[0050] Figure 3a This is a front view of the main base in the present invention;

[0051] Figure 3b It is a side view of the main frame of the present invention;

[0052] Figure 4a It is a schematic diagram of the structure of the roller assembly in the present invention;

[0053] Figure 4b It is a schematic diagram of the side structure of the roller assembly in the present invention;

[0054] Figure 5a It is a schematic diagram of the side pressing assembly structure in the present invention;

[0055] Figure 5b It is a schematic diagram of the side pressing assembly structure in the present invention;

[0056] Figure 6 It is a schematic diagram of the connection structure between the side pressing assembly and the roller assembly in the present invention;

[0057] Figure 7a It is a schematic structural diagram of the pressing device on the roller in the present invention;

[0058] Figure 7b It is a schematic diagram of the structure of the pressing device on the roller in the present invention;

[0059] Figure 7c It is a schematic diagram of the structure of the pressing device on the roller in the present invention;

[0060] Figure 8a It is a schematic diagram of the structure of the lower guide plate support assembly of the present invention;

[0061] Figure 8b It is a side structural schematic diagram of the lower guide plate support assembly of the present invention;

[0062] Figure 9a It is a schematic diagram of the structure of the upper guide plate support assembly of the present invention;

[0063] Figure 9bIt is a structural schematic diagram of the upper guide plate support assembly from another perspective of the present invention;

[0064] Fig.9c It is a schematic diagram of the planar structure of the upper guide plate support assembly of the present invention;

[0065] Fig.10 This is a schematic diagram of the installation of the jacking cylinder in the present invention;

[0066] Fig.11a This is a front view of the cover of the present invention;

[0067] Fig.11b It is a side schematic diagram of the cover of the present invention;

[0068] Fig.12 It is another perspective structural schematic diagram of the present invention;

[0069] Fig.13 It is a schematic diagram of the opening state of the present invention;

[0070] In the figure: 1. Mainframe; 2. Machine cover; 2.1. Mounting port; 2.2. Slider; 3.1. Lower guide plate; 3.2. Lower guide plate seat; 3.3. Inlet guide sleeve; 3.4. Inlet guide sleeve locking cylinder; 3.5. Lower guide plate pad; 4.1. Roller box; 4.2. Roller; 4.3. Dovetail groove; 5.1. Adjustment hydraulic motor; 5.2. Balance hydraulic cylinder 1; 5.3. Turbine reducer 1; 5.4. Side pressure screw; 5.5. Pull block; 6.1. Upper guide plate; 6.2. Support frame; 6.3. Upper guide plate locking hydraulic cylinder; 6.4. Balance hydraulic cylinder 2; 6.5. Turbine reducer 2; 6.6. Upper adjustment screw; 6.7, pull rod one; 6.8, upper guide plate locking hook; 6.9, hydraulic motor; 6.10, inclined plane; 6.11, upper guide plate pad; 7, tightening cylinder; 8, tightening inclined block; 9.1, clamping hydraulic cylinder; 9.2, push rod; 9.3, pin; 9.4, positioning key; 9.5, slider support; 9.6, wedge block; 9.7, lower pressure block; 9.8, return spring; 9.9, slide plate; 10.1, hood locking cylinder; 10.2, inclined block; 10.3, inclined wedge; 10.4, pull rod two; 10.5, hood opening hydraulic cylinder; 10.6, rotating support seat; 10.7, rotating swing arm; 10.8, fastening pad;. DETAILED DESCRIPTION

[0071] The technical solution of the present invention is further explained below through specific implementation methods.

[0072] Example 1

[0073] Referring to the accompanying drawings, the present invention provides a small hot-rolled seamless steel pipe piercing machine, comprising a main frame 1, a machine cover 2, a roller assembly, and a side pressing assembly;

[0074] On the main base 1, one end of the cover 2 is hingedly connected to the main base 1;

[0075] A roller assembly is installed in the main machine base 1; side pressing assemblies are arranged on both sides of the main machine base;

[0076] The roll assembly includes a roll box 4.1, a roll 4.2 is installed inside the roll box 4.1, and a dovetail groove 4.3 is provided on the outer wall of the roll box 4.1; and the direction of the dovetail groove 4.3 is consistent with the angle of the roll 4.2; so as to avoid the rolling force acting on the roll 4.2 during the production process to generate a force couple;

[0077] The side pressure feed assembly includes an adjustment hydraulic motor 5.1 and a balancing hydraulic cylinder 5.2. The adjustment hydraulic motor 5.1 is powered by a turbine reducer 5.3, a side pressure feed screw 5.4 is connected to the turbine reducer 5.3, the side pressure feed screw 5.4 and the worm gear reducer 1 adopt a spline transmission, which is stable and reliable. A screw nut is fixed in the main frame 1, the side pressure feed screw 5.4 fits in the screw nut, a pull block 5.5 is connected to the end of the side pressure feed screw 5.4, and the pull block 5.5 is installed and fit in the dovetail groove 4.3; the end of the balancing hydraulic cylinder 5.2 is pressed against the outside of the roll box 4.1; the balancing hydraulic cylinder 5.2 overcomes the gap between the side pressure feed screw 5.4 and the copper nut installed in the main frame 1 after it presses against the roll box 4.1.

[0078] Example 2

[0079] On the basis of the structure of embodiment 1, a roller upper clamping device is further provided on the upper side of the roller 4.2; the roller upper clamping device includes a clamping hydraulic cylinder 9.1, a push rod 9.2, a pin 9.3, a positioning key 9.4, a slider support 9.5, a wedge block 9.6, a lower pressure block 9.7, a return spring 9.8, and a slide plate 9.9;

[0080] The clamping hydraulic cylinder 9.1 is installed on the machine cover 2, and the protruding end is deep into the machine cover 2 and connected with a push rod 9.2. The pin shaft 9.3 at the end of the push rod 9.2 is connected with a wedge block 9.6; the pin shaft is blocked by a baffle and connected with bolts to prevent the pin shaft from falling off; the upper side of the wedge block 9.6 is installed in the slider support 9.5, and the lower side of the wedge block 9.6 contacts the lower pressing block 9.7, and a protrusion protrudes from the lower side of the lower pressing block 9.7; the slide plate 9.9 is provided with a through hole, and the protrusion fits in the through hole; a return spring 9.8 is installed between the slide plate 9.9 and the lower pressing block 9.7;

[0081] Key slots are provided on the slider support 9.5 and the machine cover 2, respectively, and the positioning keys 9.4 are installed in the key slots; the slider support block is fixed to the machine cover by bolts through the positioning keys;

[0082] The pressing device on the roll box 4.1 is provided at two locations on each roll box 4.1.

[0083] Example 3

[0084] On the basis of the structure of embodiment 1 or embodiment 2, a lower guide plate support assembly is further provided; the lower guide plate support assembly is installed on the main frame, and both sides of the lower guide plate support assembly are installed as roller assemblies in the main frame 1;

[0085] The lower guide plate support assembly includes a lower guide plate 3.1, a lower guide plate seat 3.2, an inlet guide sleeve 3.3, and an inlet guide sleeve locking cylinder 3.4;

[0086] The lower guide plate seat 3.2 is fixed on the main frame 1; the lower guide plate seat 3.2 is provided with front and rear bosses for front and rear positioning, and is fixed with high-strength bolts in the up and down directions to ensure the stability of the lower guide plate seat 3.2; the tail end is installed on the outlet side opposite to the rolling direction;

[0087] The lower guide plate 3.1 and the inlet guide sleeve 3.3 are respectively fixed on the lower guide plate seat 3.2. A guide sleeve locking hook is installed at the end of the lower guide plate seat 3.2 through a pin shaft 9.3. The other end of the guide sleeve locking hook is connected to an inlet guide sleeve locking cylinder 3.4. A fixed arm is formed on the inlet guide sleeve 3.3. The guide sleeve locking hook bites on the fixed arm when fixed; the inlet guide sleeve locking cylinder 3.4 locks the inlet guide sleeve 3.3 and the lower guide plate 3.1 in place at one time;

[0088] In specific use, a lower guide pad 3.5 can also be arranged between the lower guide plate 3.1 and the lower guide plate seat 3.2; a boss is arranged at the bottom of the lower guide pad 3.5 for left and right positioning, and a slope is designed at the tail end for rear and upper and lower positioning;

[0089] Example 4

[0090] The cover 2 is provided with an upper guide plate support assembly; the upper guide plate support assembly includes an upper guide plate 6.1, a support frame 6.2, an upper guide plate locking hydraulic cylinder 6.3, a second balancing hydraulic cylinder 6.4, a second turbine reducer 6.5, an upper adjustment screw 6.6, a pull rod 6.7, and an upper guide plate locking hook 6.8;

[0091] A hydraulic motor 6.9 is installed on the support frame 6.2, and the power of the hydraulic motor 6.9 is connected to the turbine reducer 6.5, and an upper adjustment screw 6.6 is connected to the turbine reducer 6.5; a screw nut is installed in the machine cover 2, and the upper adjustment screw 6.6 is installed on the screw nut;

[0092] The upper guide plate locking hydraulic cylinder 6.3 is installed on the support frame 6.2, and the extended end is deeply connected to the support frame 6.2 to connect the pull rod 1 6.7, and the end of the pull rod 1 6.7 is connected to the upper guide plate locking hook 6.8; the upper guide plate 6.1 is installed on the support frame 6.2; the upper guide plate locking hydraulic cylinder 6.3 locks the upper guide plate 6.1 through the pull rod 1 6.7 and the upper guide plate locking hook 6.8; the pull rod 1 6.7 can adjust the distance between the upper guide plate locking hook 6.8 and the upper guide plate locking hydraulic cylinder 6.3;

[0093] During specific use, the upper guide plate support assembly may further include an upper guide plate pad 6.11, and the upper guide plate pad 6.11 is installed between the upper guide plate support frame 6.2 and the upper guide plate 6.1.

[0094] A second balancing hydraulic cylinder 6.4 is also provided on the support frame 6.2, and the extended end of the second balancing hydraulic cylinder 6.4 is against the upper surface of the cover 2; the second balancing hydraulic cylinder 6.4 eliminates the gap between the upper adjustment screw 6.6 and the copper nut installed on the cover 2;

[0095] The machine cover 2 is provided with an installation opening 2.1, and the middle part of the support frame 6.2 is installed in the installation opening 2.1; an inclined surface 6.10 is provided outside the corner of the middle part of the support frame 6.2 to cooperate with the slider 2.2 in the machine cover 2.

[0096] The machine cover 2 is also provided with an upper guide plate support clamping device, and the structure of the upper guide plate support clamping device is as follows: corresponding to the position of the mounting port 2.1, a tightening cylinder 7 is provided on the machine cover 2, the protruding end of the tightening cylinder 7 extends deep into the mounting port 2.1, and is connected to a tightening bevel block 8 at the end; the tightening cylinder 7 is provided at one or more places, and when used specifically, can be provided at two opposite places, one at the front side and one at the rear side.

[0097] Example 5

[0098] Based on the structure of Example 1, the connection structure of the cover 2 mounted on the main base 1 includes a cover locking cylinder 10.1, an inclined block 10.2, an inclined wedge 10.3, a pull rod 10.4, a cover opening hydraulic cylinder 10.5, a rotating support seat 10.6, and a rotating swing arm 10.7;

[0099] The cover locking cylinder 10.1 is installed on the cover 2, and the end is connected with an inclined block 10.2; in the locked position, a fastening pad 10.8 is also provided on the cover 2, and a pull rod mounting hole 2.1 and an inclined wedge 10.3 mounting hole 2.1 are provided in the fastening pad 10.8; the cover opening hydraulic cylinder 10.5 is installed on the cover 2, and the end shaft is connected to the main engine base 1; a rotating swing arm 10.7 is also fixed to the other end of the cover 2;

[0100] The main engine base 1 is provided with a rotating support base 10.6, and a rotating swing arm 10.7 is installed in the rotating support base 10.6; a pull rod 10.4 is also axially connected to the main engine base 1, and a mounting through hole is opened on the upper part of the pull rod 10.4;

[0101] When locking, the inclined block 10.2 and the inclined wedge 10.3 are installed in the installation through hole; the cover 2 is locked by the pull rod on the main frame 1, the cover locking cylinder 10.1 and the inclined wedge 10.3. The cover 2 is automatically opened and closed by two cover opening hydraulic cylinders 10.5 in cooperation with the rotating swing arm 10.7 and the rotating support seat, which is convenient for replacing the roller 4.2; the roller box 4.1 pressing device presses the roller box 4.1 after the cover 2 is closed to eliminate the gap between the cover 2 and the roller box 4.1 to prevent the roller 4.2 from tilting backward during production.

[0102] Example 6

[0103] The working method of the above-mentioned small hot-rolled seamless steel pipe piercing machine comprises the following steps:

[0104] Locking of the machine cover 2: Install the tie rod 2 10.4 in the tie rod installation opening, and after the machine cover locking cylinder 10.1 pushes the inclined block 10.2 into the installation through hole, manually install the inclined wedge 10.3 in the installation through hole;

[0105] According to the process parameters of the steel pipe, the upper guide plate 6.1 support is adjusted, and the turbine reducer 6.5 drives the upper adjustment screw 6.6 in its screw nut to install the upper guide plate 6.1 support; then the balance hydraulic cylinder 6.4 is tightened on the machine cover 2 so that there is no movement gap in the upper and lower directions; the tightening cylinder 7 is tightened so that there is no movement gap in the left and right directions;

[0106] The worm reducer 5.3 in the side pressing assembly drives the side pressing screw 5.4 to press the roll box 4.1, and then the balance hydraulic cylinder 5.2 presses the outside of the roll box 4.1 again; in the upper clamping device of the roll box, when the clamping hydraulic cylinder 9.1 extends, the protrusion presses against the roll box 4.1, so that the roll assembly runs without gap. When the clamping hydraulic cylinder 9.1 retracts, the reset spring 9.8 returns the lower pressure block 9.7 to its original position, releasing the clamping of the roll box 4.1. The side pressing assembly and the upper clamping device work together to make the roll assembly free of movement gap;

[0107] When replacing the roller, the various places are tightened and loosened, and the inclined wedge 10.3 is manually removed. After the machine cover locking cylinder 10.1 pulls the inclined block 10.2 out of the installation through hole, the pull rod 10.4 is rotated, and the machine cover opening hydraulic cylinder 10.5 automatically opens the machine cover to replace the roller.

Claims

1. A small hot-rolled seamless steel pipe piercing machine, characterized in that: It includes main machine base, machine cover, roller assembly and side pressing assembly; On the main engine base, one end of the cover is hingedly connected to the main engine base; A roller assembly is installed in the main machine base; side pressing assemblies are arranged on both sides of the main machine base; The roll assembly includes a roll box, rolls are installed inside the roll box, and dovetail grooves are provided on the outer wall of the roll box; and the direction of the dovetail grooves is consistent with the angle of the rolls; The side pressure feed assembly includes an adjustment hydraulic motor and a balancing hydraulic cylinder. The adjustment hydraulic motor is powered by a turbine reducer. A side pressure feed screw is connected to the turbine reducer. A screw nut is fixed in the main engine seat. The side pressure feed screw fits in the screw nut. A pull block is connected to the end of the side pressure feed screw. The pull block is installed in the dovetail groove. The end of the balancing hydraulic cylinder is pressed tightly against the outside of the roller box.

2. The small hot-rolled seamless steel pipe piercing machine according to claim 1, characterized in that: The upper side of the roller is also provided with a roller clamping device; the roller clamping device includes a clamping hydraulic cylinder, a push rod, a positioning key, a slider support, a wedge block, a lower pressure block, a return spring, and a slide plate; The clamping hydraulic cylinder is installed on the machine cover, and the protruding end is deep into the machine cover and connected with a push rod. The pin at the end of the push rod is connected with a wedge block. The upper side of the wedge block is installed in the slider support, and the lower side of the wedge block contacts the lower pressure block. A protrusion protrudes from the lower side of the lower pressure block. A through hole is opened on the slide plate, and the protrusion fits in the through hole. A return spring is installed between the slide plate and the lower pressure block. The slide block support and the machine cover are respectively provided with key slots, and the positioning keys are installed in the key slots; the slide block is fixed to the machine cover by bolts through the positioning keys.

3. The small hot-rolled seamless steel pipe piercing machine according to claim 2, characterized in that: The roller upper pressing device is arranged at two locations on each roller box.

4. The small hot-rolled seamless steel pipe piercing machine according to claim 1, characterized in that: The small hot-rolled seamless steel pipe perforator also includes a lower guide plate support assembly; the lower guide plate support assembly is installed on the main machine base, and both sides of the lower guide plate support assembly are installed in the main machine base as roller assemblies; The lower guide plate support assembly includes a lower guide plate, a lower guide plate seat, an inlet guide sleeve, and an inlet guide sleeve locking cylinder; The guide plate seat is fixed on the main machine seat; the lower guide plate and the inlet guide sleeve are respectively fixed on the lower guide plate seat, and a guide sleeve locking hook is installed at the end of the lower guide plate seat through a pin shaft, and the other end of the guide sleeve locking hook is connected to the inlet guide sleeve locking cylinder, and a fixed arm is formed on the inlet guide sleeve, and the guide sleeve locking hook is engaged with the fixed arm when fixed.

5. The small hot-rolled seamless steel pipe piercing machine according to claim 1, characterized in that: The small hot-rolled seamless steel pipe perforator also includes an upper guide plate support assembly; the upper guide plate support assembly is arranged on the machine cover; The upper guide plate support assembly includes an upper guide plate, a support frame, an upper guide plate locking hydraulic cylinder, a second balancing hydraulic cylinder, a second turbine reducer, an upper adjustment screw, a pull rod, and an upper guide plate locking hook; A hydraulic motor is installed on the support frame, and the power of the hydraulic motor is connected to the second turbine reducer, and an upper adjustment screw is connected to the second turbine reducer; a screw nut is installed in the machine cover, and the upper adjustment screw is installed on the screw nut; The upper guide plate locking hydraulic cylinder is installed on the support frame, and the extended end is deeply inserted into the support frame to connect the pull rod one, and the end of the pull rod one is connected to the upper guide plate locking hook; the upper guide plate is installed on the support frame and locked by the upper guide plate locking hook; A second balancing hydraulic cylinder is also arranged on the support frame, and the extended end of the second balancing hydraulic cylinder is against the upper surface of the machine cover; The machine cover is provided with an installation opening, and the middle part of the support frame is installed in the installation opening; an inclined surface is arranged outside the corner of the middle part of the support frame to cooperate with the sliding block in the machine cover.

6. The small hot-rolled seamless steel pipe piercing machine according to claim 4, characterized in that: The lower guide plate support assembly also includes a lower guide plate pad; the lower guide plate pad is installed on the lower guide plate seat; the lower guide plate is installed on the lower guide plate pad; The upper guide plate support assembly also includes an upper guide plate pad, which is installed between the upper guide plate support frame and the upper guide plate.

7. The small hot-rolled seamless steel pipe piercing machine according to claim 5, characterized in that: The machine cover is also provided with an upper guide plate support clamping device, and the structure of the upper guide plate support clamping device is as follows: a tightening cylinder is provided on the machine cover corresponding to the installation port position, the extended end of the tightening cylinder extends deep into the installation port, and a tightening bevel block is connected to the end; the tightening cylinder is provided at one or more times.

8. The small hot-rolled seamless steel pipe piercing machine according to claim 1, characterized in that: The connection structure for mounting the hood on the mainframe includes a hood locking cylinder, an inclined block, an inclined wedge, a second pull rod, a hood opening hydraulic cylinder, a rotating support seat, and a rotating swing arm; The hood locking cylinder is installed on the hood, and a wedge is connected to the end thereof; in the locking position, a fastening pad is also provided on the hood, and a pull rod mounting opening and an inclined wedge mounting opening are provided in the fastening pad; the hood opening hydraulic cylinder is installed on the hood, and the end shaft is connected to the main engine base; a rotating swing arm is also fixed to the other end of the hood; The main engine seat is provided with a rotating support seat, and the rotating swing arm is installed in the rotating support seat; the main engine seat is also axially connected with a second pull rod, and an installation through hole is opened on the upper part of the second pull rod; When locking, the bevel block and the bevel wedge are installed in the installation through hole.

9. The small hot-rolled seamless steel pipe piercing machine according to claim 1, characterized in that: The power between the hydraulic motor and the turbine reducer 1 and between the hydraulic motor and the turbine reducer 2 is adjusted to be driven by chains and sprockets.

10. The small hot-rolled seamless steel pipe piercing machine according to claim 1, characterized in that: The working method of the above-mentioned small hot-rolled seamless steel pipe piercing machine comprises the following steps: Cover locking: Install the tie rod 2 in the tie rod installation port. After the cover locking cylinder pushes the inclined block into the installation through hole, manually install the inclined wedge in the installation through hole. According to the process parameters of the steel pipe, adjust the upper guide plate supporter, and the second turbine reducer drives the upper adjustment screw in its screw nut to install the upper guide plate supporter; then the second balancing hydraulic cylinder is tightened on the machine cover; the tightening cylinder is tightened; The turbine reducer 1 in the side pressing assembly drives the side pressing screw to press the roll box tightly, and then the balance hydraulic cylinder 1 presses the outside of the roll box again; the roller upper pressing device presses the upper side of the roll box tightly; When replacing the roller, loosen the pressure at various places, remove the inclined wedge manually, and then the cover locking cylinder pulls the inclined block out of the installation through hole. Then turn and pull rod 2, and the cover opening hydraulic cylinder automatically opens the cover to replace the roller.

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