CN113061836A - Nitriding furnace for threaded surface of drill rod head - Google Patents
Nitriding furnace for threaded surface of drill rod head Download PDFInfo
- Publication number
- CN113061836A CN113061836A CN202110275664.9A CN202110275664A CN113061836A CN 113061836 A CN113061836 A CN 113061836A CN 202110275664 A CN202110275664 A CN 202110275664A CN 113061836 A CN113061836 A CN 113061836A
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- Prior art keywords
- furnace
- nitriding
- tank
- drill rod
- head
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- 238000005121 nitriding Methods 0.000 title claims abstract description 39
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000005485 electric heating Methods 0.000 claims abstract description 4
- 239000012266 salt solution Substances 0.000 claims description 23
- 150000003839 salts Chemical class 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 13
- 238000007514 turning Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 238000006902 nitrogenation reaction Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 230000007306 turnover Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
- C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
- C23C8/48—Nitriding
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a nitriding furnace for a threaded surface of a drill rod head, which comprises a furnace body, wherein a hearth with an opening at the upper end is arranged in the furnace body, a furnace tank with an opening at the upper end is arranged in the hearth along the length direction of the hearth, electric heating elements are arranged on two side walls of the hearth, a turnover support is hinged to one side of the furnace body in a turnover manner, a material rack is fixed on the turnover support, a plurality of drill rods are fixed on the material rack in parallel, and a furnace cover is hinged to one side of the furnace tank. The nitriding furnace for the thread surface of the drill rod head optimizes the heat treatment nitriding process, changes the original vertical hoisting heat treatment nitriding mode into a turnover inclined heat treatment nitriding mode, and has the advantages of simple structure and ingenious design; the method is convenient to operate, improves the heat treatment nitriding efficiency of the threads at the head of the drill rod, and simultaneously ensures that the drill rod is not damaged in the heat treatment nitriding process.
Description
Technical Field
The invention belongs to the technology of manufacturing and processing of drill rods, and particularly relates to a nitriding furnace for a threaded surface of a drill rod head.
Background
It is known that during the machining of drill rods, nitriding heat treatment of the thread surface of the head is required. In the traditional heat treatment nitridation processing of the drill rods, a plurality of drill rods are bound together by ropes and then hoisted to process the drill rods, but the method is complex in operation, troublesome and time-wasting, and the drill rods bound together collide with one another in the hoisting process, so that the drill rods are damaged, and the quality of the drill rods is influenced.
Disclosure of Invention
The invention aims to provide a nitriding furnace for the surface of a thread at the head of a drill rod, which aims to solve the problems that in the prior art, the heat treatment nitriding of the thread at the head of the drill rod has complex operation, low efficiency and easy damage to the drill rod.
In order to achieve the purpose, the invention adopts the following technical scheme:
a nitriding furnace for the threaded surface of the head of a drill rod comprises a furnace body, wherein a furnace hearth with an opening at the upper end is arranged in the furnace body, a furnace tank with an opening at the upper end is arranged in the furnace hearth along the length direction of the furnace hearth, electric heating elements are arranged on two side walls of the furnace hearth, a turning support is hinged to one side of the furnace body in a turnable manner, a turning oil cylinder is connected to the bottom of the turning support, a material rest is fixed on the turning support, a plurality of drill rods are fixed on the material rest in parallel, the threads of the heads of the drill rods are positioned on one side close to the furnace body, a furnace cover is hinged to one side of the furnace tank far away from the material rest, the width of the furnace cover is smaller than that of the furnace tank, when the threads of the heads of the plurality of drill rods are subjected to heat treatment and nitrogenation, the inside of the furnace tank is provided with salt solution, the thread at the head of the drill rod is positioned below the liquid level of the salt solution, and the opening part of the furnace tank is sealed by the furnace cover which is covered again.
Particularly, an automatic salt adding opening is formed in one end of the furnace tank, and an automatic salt supplying device is connected to the automatic salt adding opening.
Particularly, the bottom of the furnace tank is provided with a stirring component which can move in a reciprocating way along the length direction of the furnace tank, and the stirring component is connected with a stirring driving device.
Particularly, the stirring driving device comprises a speed reducer, a transmission screw and a screw nut, the transmission screw is installed on one side of the furnace tank through a bearing seat and is arranged along the length direction of the furnace tank, the speed reducer is connected with the transmission screw, the screw nut is installed on the transmission screw, and the screw nut is fixedly connected with the stirring component through a connecting plate.
Particularly, a salt liquid filtering device is arranged in the furnace tank relative to the other end provided with the automatic salt adding port.
Particularly, the salt solution filtering device comprises a filtering core, a circulation loop and a negative pressure generating device, the circulation loop is connected to the furnace tank, the negative pressure generating device is connected to the circulation loop, and when the salt solution filtering device works, the negative pressure generating device generates negative pressure in the circulation loop, so that the salt solution in the furnace tank is filtered by the filtering core and then is sent into the furnace tank.
Particularly, a plurality of liquid sensors for detecting whether salt liquid leaks are mounted at the bottom of the hearth and electrically connected with a controller of the nitriding furnace.
Compared with the prior art, the heat treatment nitriding process of the nitriding furnace for the thread surface of the drill rod head is optimized, the original vertical hoisting heat treatment nitriding mode is changed into the turnover inclined heat treatment nitriding mode, and the drill rod head is automatically conveyed below the salt solution level of the furnace tank through the turnover support. Not only the structure is simple, but also the design is ingenious; the method has the advantages of improving the heat treatment nitriding efficiency of the threads at the head of the drill rod, reducing the heat loss in the heat treatment nitriding process and simultaneously ensuring that the drill rod is not damaged in the heat treatment nitriding process, along with convenient and fast operation.
Drawings
FIG. 1 is a schematic structural diagram of a nitriding furnace for the threaded surface of the head of a drill rod according to an embodiment of the invention;
FIG. 2 is a heat treatment nitriding state diagram of a nitriding furnace for the thread surface of the drill stem head according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a stirring system and a salt solution filtering system of the thread surface nitriding furnace at the head of the drill rod according to the embodiment of the invention.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 3, in the present embodiment, a drill pipe head thread surface nitriding furnace includes a furnace body 1, a furnace chamber 2 having an open upper end is disposed in the furnace body 1, a furnace pot 3 having an open upper end is disposed in the furnace chamber 2 along a length direction thereof, a space is provided between the furnace chamber 2 and a middle lower portion of the furnace pot 3, two side walls of the hearth 2 of the section are provided with electric heating elements 4, one side of the furnace body 1 along the length direction is used as a feeding side, the feeding side can be hinged with a turning support 5 in a turning way, the bottom of the turning support 5 is connected with a turning oil cylinder 6, and a material rack 7 is fixed on the turning support 5, a plurality of drill rods 8 are fixed on the material rack 7 at intervals in parallel, the head threads of the drill rods are positioned on one side close to the furnace body 1, a furnace cover 9 is hinged to the other side, opposite to the feeding side, of the furnace tank 3, the furnace cover 9 is connected with a driving cylinder, and the width of the furnace cover 9 is smaller than that of the furnace tank 3.
One end of the furnace tank 3 is provided with an automatic salt adding opening 10, an automatic salt supplying device is connected to the automatic salt adding opening 10, the automatic salt supplying device supplies salt into the furnace tank 3 through the automatic salt adding opening 10, and salt liquid is formed after heating. The stirring part 11 that extends along its width direction is installed to the bottom of retort 3, and stirring drive arrangement includes speed reducer 12, drive screw 13 and screw nut 14, and drive screw 13 passes through bearing frame 15 to be installed in one side of retort 3 and arranges along the length direction of retort 3, and speed reducer 12 connects drive screw 13, and screw nut 14 installs on drive screw 13, and screw nut 14 passes through connecting plate 16 fixed connection stirring part 11. The speed reducer 12 drives the rotary screw 13 to rotate, and the screw nut 14 drives the stirring component 11 to reciprocate along the length direction of the furnace tank 3 to stir the salt solution in the furnace tank 3 so as to ensure the uniform concentration of the salt solution.
The other end that sets up automatic salt mouth 10 is provided with salt solution filter equipment in the retort 3 for setting up, salt solution filter equipment includes filter element 17, circulation circuit 18 and negative pressure generating device 19, circulation circuit 18 is connected on retort 3, negative pressure generating device 19 inserts on the circulation circuit 18, during operation, negative pressure generating device 19 makes the negative pressure that produces in the circulation circuit 18 send into retort 3 after the salt solution in the retort 3 filters through filter element 17 again in, filter element 17 filters the impurity that salt solution produced in the heat treatment nitrogenize process.
The bottom of furnace 2 is installed a plurality of and is used for detecting the liquid sensor 20 that whether leaks the salt solution, and liquid sensor 20 is connected with the controller electricity of nitriding furnace, and when liquid sensor 20 detected that there is the salt solution bottom furnace 2, it has the leakage to indicate the salt solution in the boiler tank 3, and liquid sensor 20 sends the signal to the controller, and the controller control nitriding furnace shuts down.
When the nitriding treatment is carried out, the furnace cover 9 is in an open state in an initial state, the overturning oil cylinder 6 drives the overturning support 5 to rotate, the overturning support 5 drives the drill rod head threads on the material rack 7 to overturn for a certain angle to enter the furnace tank 3, the drill rod 8 head threads are positioned below the liquid level of the salt solution, and the furnace cover 9 is covered to close the open part of the furnace tank 3. After the heat treatment nitridation is finished, the furnace cover 9 is opened, and the overturning oil cylinder 6 is reset to the initial state.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (7)
1. A nitriding furnace for the threaded surface of the head of a drill rod is characterized by comprising a furnace body, wherein a hearth with an opening at the upper end is arranged in the furnace body, a furnace tank with an opening at the upper end is arranged in the furnace tank along the length direction of the hearth, electric heating elements are arranged on two side walls of the hearth, a turning support is hinged to one side of the furnace body in a turnable manner, a turning oil cylinder is connected to the bottom of the turning support, a material rack is fixed on the turning support, a plurality of drill rods are fixed on the material rack in parallel, the threads of the head of the drill rod are positioned on one side close to the furnace body, a furnace cover is hinged to one side of the furnace tank far away from the material rack, the width of the furnace cover is smaller than that of the furnace tank, when the threads of the head of the plurality of drill rods are subjected to heat treatment and nitrogenation, the furnace cover, the inside of the furnace tank is provided with salt solution, the thread at the head of the drill rod is positioned below the liquid level of the salt solution, and the opening part of the furnace tank is sealed by the furnace cover which is covered again.
2. The furnace for nitriding the threaded surface of the head of the drill rod according to claim 1, wherein an automatic salt adding port is formed in one end of the furnace tank, and an automatic salt supplying device is connected to the automatic salt adding port.
3. The furnace for nitriding the threaded surface of the drill pipe head according to claim 1, wherein a stirring member capable of reciprocating along the length direction of the furnace tank is mounted at the bottom of the furnace tank, and a stirring driving device is connected to the stirring member.
4. The drill rod head threaded surface nitriding furnace as claimed in claim 3, wherein the stirring driving device comprises a speed reducer, a transmission screw and a screw nut, the transmission screw is mounted on one side of the furnace tank through a bearing seat and arranged along the length direction of the furnace tank, the speed reducer is connected with the transmission screw, the screw nut is mounted on the transmission screw, and the screw nut is fixedly connected with the stirring component through a connecting plate.
5. The furnace for nitriding the threaded surface of the drill pipe head according to claim 1, wherein a salt solution filtering device is arranged in the furnace tank opposite to the other end provided with the automatic salt adding port.
6. The nitriding furnace for the threaded surface of the head of the drill rod as claimed in claim 5, wherein the salt solution filtering device comprises a filter element, a circulation loop and a negative pressure generating device, the circulation loop is connected to the furnace tank, the negative pressure generating device is connected to the circulation loop, and when the nitriding furnace is in operation, the negative pressure generating device generates negative pressure in the circulation loop to filter the salt solution in the furnace tank through the filter element and then send the salt solution into the furnace tank.
7. The nitriding furnace for the threaded surface of the drill pipe head according to claim 1, wherein a plurality of liquid sensors for detecting whether salt liquid leaks are mounted at the bottom of the hearth and electrically connected with a controller of the nitriding furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110275664.9A CN113061836A (en) | 2021-03-15 | 2021-03-15 | Nitriding furnace for threaded surface of drill rod head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110275664.9A CN113061836A (en) | 2021-03-15 | 2021-03-15 | Nitriding furnace for threaded surface of drill rod head |
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| Publication Number | Publication Date |
|---|---|
| CN113061836A true CN113061836A (en) | 2021-07-02 |
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|---|---|---|---|
| CN202110275664.9A Pending CN113061836A (en) | 2021-03-15 | 2021-03-15 | Nitriding furnace for threaded surface of drill rod head |
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Citations (25)
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|---|---|---|---|---|
| GB576860A (en) * | 1944-05-15 | 1946-04-24 | Birmingham Electr Furnaces Ltd | Improvements in, or relating to, rotary carburizing furnaces |
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2021
- 2021-03-15 CN CN202110275664.9A patent/CN113061836A/en active Pending
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