Pipeline tapping machine

Abstract

The utility model discloses a pipeline tapping machine which comprises a main shaft, a polygonal hollow power transmission shaft is arranged on the outer side of the main shaft in a sliding mode, a protective sleeve is arranged on the outer side of the polygonal hollow power transmission shaft, a main shaft reduction gearbox for controlling the polygonal hollow power transmission shaft to rotate is arranged on the protective sleeve, and the tail end of the main shaft is connected with a lead screw pair in a screwed mode. One end, far away from the main shaft, of the screw rod pair is connected with an output shaft of the tool retracting motor, the screw rod pair is controlled by the tool feeding mechanism, the rotation of the screw rod pair is controlled by the tool feeding mechanism, so that the main shaft advances / retreats, the pipeline trepanning is realized, the structure is simple, and the use is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline processing, in particular to a pipeline hole opening machine. Background Art

[0002] When installing bypass branches, adding valves and other control facilities, or repairing damaged liquid and gas pipelines, it is necessary to drill holes in the pipelines, and the working environment is relatively harsh. There are special drilling machines for pipeline drilling, which use pipe cutters to drill the holes required for the transfer vertically, horizontally, or at a certain angle on the original pipeline. The drilling machine has a hydraulic motor or an electric motor to drive the spindle, and uses a differential feed mechanism to automatically feed the knife or the operator manually feeds the knife on the machine to complete the required drilling. Manual feeding requires the cooperation of two people, one person manually operates the hydraulic station, and the other uses the feed handle to control the feed amount, which is completely based on the worker's personal experience. However, the existing drilling machine has a complex structure and is very inconvenient to use. Utility Model Content

[0003] The purpose of the utility model is to provide a pipeline hole opening machine to solve the problems raised in the above background technology.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A pipe hole opening machine comprises a main shaft, a polygonal hollow power transmission shaft is slidably provided on the outer side of the main shaft, a protective sleeve is provided on the outer side of the polygonal hollow power transmission shaft, a main shaft reduction box for controlling the rotation of the polygonal hollow power transmission shaft is provided on the protective sleeve, a screw pair is screwed on the tail end of the main shaft, the end of the screw pair away from the main shaft is connected to the output shaft of a tool retracting motor, and the screw pair is controlled by a tool feed mechanism.

[0006] Preferably, the polygonal hollow power transmission shaft and the main shaft connecting cross-section are polygonal structures.

[0007] Preferably, a thread groove is formed at the rear end of the main shaft, and the front end of the screw rod pair is screwed into the thread groove.

[0008] Preferably, the feed mechanism includes a ratchet for braking the screw pair, and a control mechanism for controlling the opening and closing of the ratchet.

[0009] Preferably, the polygonal hollow power transmission shaft is rotatably connected to the protective sleeve, and the polygonal hollow power transmission shaft is connected to the main shaft reduction box through a key transmission.

[0010] Preferably, the spindle reduction box is driven by a hydraulic motor or an electric motor, and the hydraulic motor is driven by oil flow provided by a hydraulic station.

[0011] Preferably, it also includes a signal transmitter and a handheld signal receiver, wherein the signal transmitter is arranged on the side of the feed mechanism and is used to transmit the status of the pipe hole opening machine, and the handheld signal receiver is used to receive and display the status of the pipe hole opening machine.

[0012] Preferably, a box connecting support is provided at the bottom of the protective sleeve.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] In the utility model, the rotation of the screw rod pair is controlled by the feed mechanism, so that the main shaft can be advanced / retreat, thereby realizing the opening of the pipeline, and the structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the hydraulic station of the utility model;

[0017] Figure 3 This is a schematic diagram of the knife retraction structure of the utility model;

[0018] Figure 4 This is the front view of the tool retraction structure of the utility model;

[0019] Figure 5 This is a schematic diagram of the main shaft structure of the utility model;

[0020] Figure 6 It is a schematic diagram of the structure of the handheld signal receiver of the utility model;

[0021] In the figure: 1. spindle; 2. spindle reduction box; 3. polygonal hollow power transmission shaft; 4. protective sleeve; 5. feed mechanism; 6. retract motor; 7. screw pair; 8. connecting box support; 9. hydraulic station; 10. signal transmitter; 11. handheld signal receiver. DETAILED DESCRIPTION

[0022] The specific implementation modes of the present utility model are described in detail below.

[0023] The "range" disclosed in the utility model is defined in the form of a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of a particular range. The range defined in this way can be inclusive or exclusive of the end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10 to 50 is listed for a specific parameter, it is understood that the range of 10 to 40 and 20 to 50 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following ranges can all be expected: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4 and 2 to 5. In this application, unless otherwise specified, the range of values ​​"a to b" represents an abbreviation of any real number combination between a and b, where a and b are both real numbers. For example, the range of values ​​"0 to 5" means that all real numbers between "0 to 5" have been fully listed in this article, and "0 to 5" is only an abbreviation of these numerical combinations.

[0024] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0025] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0026] If there is no special explanation, all steps of the present application can be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), which means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0027] If there is no special explanation, the "include" and "comprising" mentioned in this application are open-ended or closed-ended. For example, the "include" and "comprising" may mean that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0028] Unless otherwise specified, the reaction is carried out at room temperature and pressure.

[0029] Unless otherwise specified, all parts or percentages are by weight.

[0030] In the present invention, all substances used are known substances and can be purchased or synthesized by known methods.

[0031] In the present invention, the devices or equipment used are all conventional devices or equipment known in the field and can be purchased.

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] Example:

[0034] A pipe opening machine, such as Figure 1-6 As shown, it includes a main shaft 1, a polygonal hollow power transmission shaft 3 is slidably provided on the outer side of the main shaft 1, a protective sleeve 4 is provided on the outer side of the polygonal hollow power transmission shaft 3, and a main shaft reduction box 2 for controlling the rotation of the polygonal hollow power transmission shaft 3 is provided on the protective sleeve 4. A screw pair 7 is screwed on the tail end of the main shaft 1, and the end of the screw pair 7 away from the main shaft 1 is connected to the output shaft of the tool retracting motor 6, and the screw pair 7 is controlled by the tool feed mechanism 5.

[0035] In a possible implementation, the connecting section between the polygonal hollow power transmission shaft 3 and the main shaft 1 is a polygonal structure.

[0036] In a possible implementation manner, a thread groove is formed at the rear end of the main shaft 1, and the front end of the screw rod pair 7 is screwed into the thread groove.

[0037] In a possible implementation, the feed mechanism 5 includes a ratchet for braking the screw pair 7 and a control mechanism for controlling the opening and closing of the ratchet.

[0038] In a possible implementation manner, the polygonal hollow power transmission shaft 3 is rotatably connected to the protective sleeve 4, and the polygonal hollow power transmission shaft 3 is connected to the main shaft reduction box 2 via a key transmission.

[0039] In a possible implementation, the spindle reduction box 2 is driven by a hydraulic motor or an electric motor, and the hydraulic motor provides oil flow drive through a hydraulic station 9 .

[0040] In a possible implementation, it also includes a signal transmitter 10 and a handheld signal receiver 11. The signal transmitter 10 is arranged on the side of the feed mechanism 5 and is used to transmit the status of the pipe hole opening machine. The handheld signal receiver 11 is used to receive and display the status of the pipe hole opening machine.

[0041] In a possible implementation manner, a box connecting support 8 is provided at the bottom of the protective sleeve 4 .

[0042] In one possible implementation, the original hole punching machine has a complex structure and high manufacturing cost. The splined hollow power transmission shaft needs to be electro-processed, and its production cost accounts for more than 40% of the total machine cost. The contact surface of the inner and outer splines is small, and due to the large power transmission, it wears faster during operation. The cost of use is relatively high. The present application simplifies the hole punching machine structure. The hollow power transmission shaft with a polygonal inner hole is produced by cold drawing and cold rolling. The contact area between the polygonal hollow power transmission shaft and the polygonal outer guide mating surface of the main shaft is much larger than that of the original hole punching machine. The production cost is about 20% of the original machine of the same specification. After wear and tear, the gap can be compensated to maintain the original accuracy. The cost of use is extremely low.

[0043] In a possible implementation, the original drilling machine spindle box has a small speed range and cannot match the appropriate speed according to the size of the hole diameter and the material of the pipe, which often leads to excessive wear or damage of the drilling blade, too long drilling time, and increased working time and labor intensity. The mechanical speed change part of the drilling machine spindle box is equipped with a gear box, and the matching speed is determined by selecting appropriate gears according to the barrel cutter diameter and the main pipe material.

[0044] In one possible implementation, the original punching machine feed box has a differential feed, and the feed amount is fixed. It cannot match the intersecting line structure of the blade contact surface when the punching knife is drilling a hole, which gradually decreases from a large contact surface at the beginning and then gradually increases. It cannot automatically adjust according to the contact surface and spindle torque during operation, and cannot stop the feed in case of over-torque or overload, causing damage to the punching machine and scrapping. The mainframe of this punching machine is equipped with a special CNC feed mechanism, and the automatic feed adopts two types of remote wireless digital control and wired digital control. The feed amount can be programmed on-site and selected by pre-stored programs according to the contact surface of the blade teeth and the spindle torque, and the feed amount can be adjusted in real time according to the data sent back by the torque sensor. It also has over-torque protection, early warning, overload shutdown, and alarm functions.

[0045] In a possible implementation, when the original drilling machine is manually feeding, the worker relies on the follow-up time of the manual control handle, causing the local cutter teeth to cut at the moment of feeding, and the cutting amount is too large, causing the cutter teeth to be damaged, the spindle to stop, and the spindle box to be damaged. The drilling machine can be manually controlled on the handheld operation panel, and the manual feed amount can be set by the worker.

[0046] In one possible implementation, the original drilling machine hydraulic station or motor is manually controlled in coordination with the feed, which is prone to information delays and misunderstandings, causing equipment damage and personnel accidents. The drilling machine is integrated with a handheld operating system with a real-time display function for the spindle torque, real-time monitoring of the feed depth, start and stop of the hydraulic station (motor type), overload protection, and an early warning electro-hydraulic proportional valve to adjust the spindle speed, and the spindle is controlled to maintain the best working state according to the real-time working conditions.

[0047] In a possible implementation, when the original drilling machine is manually fed, the worker is on the top or platform of the drilling machine for a long time, sometimes in a toxic, high temperature, or low temperature environment, which is very likely to cause damage to the worker's body. The drilling machine handheld operating system has remote wireless digital control and wired digital control. The equipment can be operated remotely, which greatly improves the working environment of the workers, protects the personal safety of the construction personnel, and promotes safe production.

[0048] In a possible implementation, the original hole-opening machine cannot adjust the spindle positioning clearance when working horizontally, causing excessive sagging under the weight of the barrel cutter, deviating from the standard center line during operation, causing the hole to be scrapped and the equipment to be damaged. The hole-opening machine is equipped with a taper gap adjustment structure at the connecting box end, which can adjust the sagging to the optimal state according to the weight of the barrel cutter and the extension length of the spindle before construction.

[0049] In a possible implementation, the polygonal hollow power transmission shaft 3 is fixed to the spindle reduction box 2 by a bearing, the spindle 1 is fixed in the polygonal hollow power transmission shaft 3 by a bearing and a screw pair 7, and the connecting box support 8 and the taper gap adjustment structure are fixed to the opposite ends of the spindle box and the polygonal hollow power transmission shaft 3. The protective sleeve 4 is fixed to the spindle reduction box 2, and the feed mechanism 5 and the retracting motor 6 are fixed to the end surface of the protective sleeve 4.

[0050] Working principle, see Figure 1-6 , Main transmission chain: The hydraulic motor (by the hydraulic station 9) or the electric motor drives the spindle reduction box 2, and the worm gear of the spindle reduction box 2 is connected by a key to drive the polygonal hollow power transmission shaft 3, and the main driving force is transmitted through the polygonal sliding block at the right end of the spindle 1, and the barrel cutter is driven by the cone at the left end of the spindle and the flat key to perform cutting.

[0051] Feed and retract drive: In the non-feeding state, the screw pair 7 and the spindle 1 rotate in the same direction driven by the polygonal hollow power transmission shaft 3, and the spindle 1 does not feed. When feeding, the feed mechanism 5 makes the feed ratchet on the screw pair 7 stop short, so that the screw is reversed relative to the spindle 1. Since the nut of the screw pair 7 is fixed on the spindle 1, the spindle 1 is fed.

[0052] When the tool is retracted, the hydraulic motor (driven by the hydraulic station 9 providing oil flow) or the electric motor stops, and the spindle 1 stops. The tool retracting motor 6 drives the screw rod 7 to rotate forward to retract the tool.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipe hole opening machine, characterized in that: The invention comprises a main shaft (1), a polygonal hollow power transmission shaft (3) is slidably arranged on the outer side of the main shaft (1), a protective sleeve (4) is arranged on the outer side of the polygonal hollow power transmission shaft (3), a main shaft reduction box (2) for controlling the rotation of the polygonal hollow power transmission shaft (3) is arranged on the protective sleeve (4), a screw rod pair (7) is screwed on the tail end of the main shaft (1), an end of the screw rod pair (7) away from the main shaft (1) is connected to the output shaft of a tool retracting motor (6), and the screw rod pair (7) is controlled by a tool feed mechanism (5).

2. A pipe opening machine according to claim 1, characterized in that: The connecting cross-section of the polygonal hollow power transmission shaft (3) and the main shaft (1) is a polygonal structure.

3. A pipe opening machine according to claim 1, characterized in that: The rear end of the main shaft (1) is provided with a thread groove, and the front end of the screw rod pair (7) is screwed into the thread groove.

4. A pipe opening machine according to claim 1, characterized in that: The knife feed mechanism (5) comprises a ratchet wheel for braking the screw rod pair (7), and a control mechanism for controlling the opening and closing of the ratchet wheel.

5. A pipe opening machine according to claim 1, characterized in that: The polygonal hollow power transmission shaft (3) is rotationally connected to the protective sleeve (4), and the polygonal hollow power transmission shaft (3) is connected to the main shaft reduction box (2) through a key transmission.

6. A pipe opening machine according to claim 1, characterized in that: The spindle reduction box (2) is driven by a hydraulic motor or an electric motor, and the hydraulic motor is driven by oil flow provided by a hydraulic station (9).

7. A pipe opening machine according to claim 4, characterized in that: It also includes a signal transmitter (10) and a handheld signal receiver (11). The signal transmitter (10) is arranged on the side of the feed mechanism (5) and is used to transmit the status of the pipeline hole opening machine. The handheld signal receiver (11) is used to receive and display the status of the pipeline hole opening machine.

8. A pipe opening machine according to claim 1, characterized in that: A box connecting support (8) is provided at the bottom of the protective sleeve (4).

Images