CN202148336U - Novel special processing furnace for grinding balls - Google Patents
Novel special processing furnace for grinding balls Download PDFInfo
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- CN202148336U CN202148336U CN201120072680U CN201120072680U CN202148336U CN 202148336 U CN202148336 U CN 202148336U CN 201120072680 U CN201120072680 U CN 201120072680U CN 201120072680 U CN201120072680 U CN 201120072680U CN 202148336 U CN202148336 U CN 202148336U
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Abstract
The utility model discloses a novel special processing furnace for grinding balls, which comprises a furnace body, a quenching device and a smoke exhausting device, wherein, the smoke exhausting device is arranged at the front end of the furnace body. The novel special processing furnace is characterized in that the quenching device is connected with a discharge opening of the furnace body in a sealed manner; and a discharging switch and a discharging switch driving device for driving the discharging switch to be periodically turned on/off are arranged on the discharge opening of the furnace body. By adopting the novel special processing furnace, energy loss of a traditional grinding ball heating furnace in the feeding process and the discharging process is avoided; a large amount of oil steam produced during the quenching can be recovered to serve as part of fuel, so that the environment pollution caused by direct exhaust is reduced while energy resources are saved; and high temperature smoke gas produced during the combustion can be utilized to preheat the grinding balls, so that energy waste is reduced.
Description
Technical field
the utility model relates to the special-purpose finishing stove of a kind of novel abrading-ball.
Background technology
abrading-ball is widely used in the industrial processes field mainly as grinding medium; The process furnace of traditional mode of production abrading-ball adopts the push-down process furnace more; This process furnace relies on the screw pusher to-and-fro movement of stove tail in when work, abrading-ball is pushed in the stove by the opening for feed of stove afterbody heats; Discharge method adopts the side discharging, during discharging, and the discharging oven door opening, the push rod of extractor reaches in the stove whole siege is released, and the siege that tilts again falls into quenching apparatus with the abrading-ball in the siege and quenches.
are because in the process of pan feeding and discharging; This process furnace all will be opened corresponding fire door, even when discharging, need whole siege be released body of heater, causes a large amount of freezing airs suctions and hot gas excessive; Caused huge calorific loss, so thermo-efficiency is very low.
in traditional abrading-ball production technique, quench to adopt the forms of oil quenchings to abrading-ball in addition, and a large amount of oil vapours that in quenching process, produce directly are discharged in the air, have caused the serious environmental pollution.
Therefore, there are many shortcoming and defect in the technical process of traditional mode of production abrading-ball, are summarized as follows:
1. in the process of pan feeding and discharging, the push-down process furnace has a large amount of thermosteresis;
2. the high-temperature flue gas that burning produces in the stove directly is discharged in the environment, has caused the waste of energy;
are 3. quenched and are produced a large amount of oil vapours and be discharged in the air, have aggravated the pollution of environment, have also caused the waste of the energy.
Summary of the invention
the utility model purpose is: for overcoming the shortcoming that the conventional push rod-type process furnace that relates in the background technology exists, and a kind of special-purpose finishing stove of novel abrading-ball of energy-conserving and environment-protective is provided.
The technical scheme of
the utility model is: the special-purpose finishing stove of a kind of novel abrading-ball, comprise body of heater, quenching device and fume extractor, and said fume extractor is located at the body of heater front end; It is characterized in that: the discharge port of said quenching device and body of heater is tightly connected, and said body of heater discharge port is provided with the discharging switch and drives the discharging driving mechanism for switch that the discharging switch is done the periodicity folding.
are further; Body of heater described in the utility model is made up of the preheating chute section that fuses and the flat section of even heating two portions; The front end of said preheating chute section is provided with the opening for feed of body of heater, and the discharge port of said body of heater is positioned at the end of the flat section of even heating.Same routine techniques; The gradient of said preheating chute section is decided by the force analysis of inner abrading-ball; Abrading-ball is parallel to the partical gravity on chute section inclined-plane should be greater than downslide friction resistance, and this friction resistance is directly proportional perpendicular to the partical gravity on chute section inclined-plane and the frictional coefficient on chute section inclined-plane with abrading-ball.And the top of the flat section of said even heating laterally arrange some flat flame burners or flameless gas burner, the air-flow sense of rotation of adjacent flat flame burner nozzle or adjacent flameless gas burner is opposite; And the spout corresponding to each flat flame burner or flameless gas burner is provided with the burner block that possesses the air-flow guide effect on the furnace wall at the flat section of said even heating top, same routine techniques, and said burner block can have the special shaped brick of guide effect for wedge brick or other.
are preferred; The opening for feed of body of heater described in the utility model is provided with the charging switch and drives the charging driving mechanism for switch of charging switch folding, and also is provided with the intermediate switch drive unit of intermediate switch and the folding of driving intermediate switch between the flat section of preheating chute section and even heating.
are in detailed plan; The switch of discharging described in the utility model is a discharge baffle; Said discharging driving mechanism for switch comprises the cam that drives the discharge baffle up-down, and said cam is provided with rocking handle (promptly passing through manual driven) or said cam shaft links to each other with motor; Perhaps, said discharging driving mechanism for switch is for connecting and drive the stepper-motor of discharge baffle up-down; Perhaps; Said discharging driving mechanism for switch is for driving the pedal rod mechanism (also passing through manual driven) that discharge baffle is gone up and down; This pedal rod mechanism comprises that being zigzag articulates pedal, mobile jib and the drive plate that links to each other; Said drive plate top and discharge baffle offset, and are provided with spring between said pedal and the ground, and also are connected with spring between drive plate and the body of heater; Perhaps said discharging driving mechanism for switch is for connecting and drive the motor of discharge baffle upset.
are same; Charging switch described in the utility model is the charging baffle plate in detailed plan; Said charging driving mechanism for switch comprises the cam that drives the up-down of charging baffle plate, and said cam is provided with rocking handle or said cam shaft links to each other with motor; Perhaps, said charging driving mechanism for switch is for connecting and drive the stepper-motor of charging baffle plate up-down; Perhaps; Said charging driving mechanism for switch is for driving the pedal rod mechanism that the charging baffle plate goes up and down; This pedal rod mechanism comprises that being zigzag articulates pedal, mobile jib and the drive plate that links to each other, and said drive plate top and charging baffle plate offset, and are provided with spring between said pedal and the ground; And also being connected with spring between drive plate and the body of heater, perhaps said charging driving mechanism for switch is for connecting and drive the motor of charging baffle plate upset; And said intermediate switch is a middle baffle plate, and said intermediate switch drive unit comprises the cam that drives the middle baffle plate up-down, and said cam is provided with rocking handle or said cam shaft links to each other with motor; Perhaps, said intermediate switch drive unit is for connecting and drive the stepper-motor of middle baffle plate up-down; Perhaps; Said intermediate switch drive unit is for driving the pedal rod mechanism that middle baffle plate is gone up and down; This pedal rod mechanism comprises that being zigzag articulates pedal, mobile jib and the drive plate that links to each other, and said drive plate top and middle baffle plate offset, and are provided with spring between said pedal and the ground; And also being connected with spring between drive plate and the body of heater, perhaps said intermediate switch drive unit is for connecting and drive the motor of charging baffle plate upset.
are further, and fume extractor described in the utility model comprises the smoke outlet of being located on the preheating chute section front top furnace wall, also is provided with vacuum fan on this smoke outlet.
are preferred, and the outside surface of body of heater described in the utility model is coated with thermal insulation layer.
In the quenching device quenching oil is housed described in
the utility model, fuel head is lower than the discharge port height.
The discharging switch is when cutting out described in
the utility model, and itself and twere still leave the gap.
The principle of work of
the utility model is following: the starting stage; The charging switch open, intermediate switch is closed, and the discharging switch cuts out; Abrading-ball gets into the preheating chute section through feeding mouth, through the preheating chute section time, can accept the preheating by the high-temperature flue gas of burning generation.Abrading-ball is through after the preheating, and intermediate switch is opened, and abrading-ball rolls out the preheating chute section and gets into the flat section of even heating, discharging this moment switch closure, and abrading-ball is blocked by the discharging switch, can't continue to move.After the flat section of even heating was filled up by abrading-ball, intermediate switch and charging switch were all closed.Abrading-ball is after the flat section heating of even heating finishes; The discharging switch open; Abrading-ball is rolled out by discharge port, crashes in the quenching oil of quenching device, and intermediate switch and charging switch are also opened simultaneously; New a collection of abrading-ball gets into the preheating chute section by the charging switch, and the abrading-ball that is trapped on last stage in the preheating chute section then gets into the flat section of even heating through intermediate switch.Simultaneously, get in the furnace chamber through discharge port, near flat flame burner and air mixed, reach combustion conditions, lighted, served as part of fuel by the high temperature oil steam that quench to produce.The high-temp waste gas that burning produces is discharged from smoke outlet through the preheating chute section.The opening and closing of discharging switch periods property; Though it can block moving of abrading-ball, does not overlap sealing with twere, therefore; Even the discharging switch is in closing condition; The a large amount of oil vapours that produce in the quenching process so will be transferred in the body of heater through the gap of discharging switch and twere, and abrading-ball is carried out preheating.
The utility model has the advantages that:
1. the utility model can be avoided the power loss of traditional abrading-ball process furnace in charging, discharging process;
2. the utility model can will reclaim a large amount of oil vapours that produce when quenching, and serves as part of fuel, in save energy, has also reduced the environmental pollution that direct discharging causes;
3. the utility model can utilize the high-temperature flue gas of burning generation that abrading-ball is carried out preheating, reduce the waste of energy.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Fig. 1 is the structural representation of the utility model;
Fig. 2 is a kind of structural representation of discharging switch and drive unit thereof;
Fig. 3 is a feeding mouth structure for amplifying synoptic diagram;
Fig. 4 is the A-A sectional view of preheating chute section;
Fig. 5 is the another kind of embodiment synoptic diagram of discharging switch and drive unit thereof.
wherein: 1, body of heater; 1a, preheating chute section; 1b, the flat section of even heating; 2, quenching device; 3, fume extractor; 4, flat flame burner; 5, burner block; 6, discharge baffle; 7, cam; 8, pedal; 9, mobile jib; 10, drive plate; 11, spring; 12, charging baffle plate; 13, middle baffle plate; 14, smoke outlet; 15, thermal insulation layer; 16, quenching oil; 17, abrading-ball; 18, stiffening web.
Embodiment
Embodiment 1:
combine Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4 be a kind of novel abrading-ball special use finishing stove of the utility model comparatively preferred embodiment; Its body of heater 1 is made up of the preheating chute section 1a that fuses and the flat section of even heating 1b two portions; The front end of said preheating chute section 1a is provided with the opening for feed of body of heater 1; And the discharge port of said body of heater 1 is positioned at the end of the flat section of even heating 1b, and the bottom of body of heater 1 and top are equipped with stiffening web and reinforce.The front end of said body of heater 1 is provided with fume extractor 3, and fume extractor described in the present embodiment 3 is by the smoke outlet of being located on the preheating chute section 1a front top furnace wall 14, and the vacuum fan of being located on this smoke outlet 14 (not drawing among the figure) together constitutes.The discharge port of said body of heater 1 and quenching device 2 are tightly connected, and said body of heater 1 discharge port is provided with the discharging switch and drives the discharging driving mechanism for switch that the discharging switch is done the periodicity folding; The opening for feed of said body of heater 1 is provided with the charging driving mechanism for switch of charging switch and the folding of driving charging switch simultaneously, and also is provided with the intermediate switch drive unit of intermediate switch and the folding of driving intermediate switch between the flat section of preheating chute section 1a and the even heating 1b.
The discharging switch is a discharge baffle 6 described in
present embodiment, and said discharging driving mechanism for switch comprises the cam 7 that drives discharge baffle 6 up-downs, and said cam 7 rotating shafts link to each other with motor (not drawing among the figure); Said charging switch is a charging baffle plate 12, and said charging driving mechanism for switch is for connecting and drive the motor (not drawing among the figure) of charging baffle plate 12 upsets; And said intermediate switch is a middle baffle plate 13, and said intermediate switch drive unit is for connecting and drive the motor (not drawing among the figure) of charging baffle plate 13 upsets.
The top of the flat section of even heating described in
present embodiment 1b two flat flame burners 4 that laterally arrange, the air-flow sense of rotation of adjacent flat flame burner nozzle 4 is opposite; And the spout corresponding to each flat flame burner 4 is provided with the burner block 5 that possesses the air-flow guide effect on the furnace wall at the flat section of said even heating 1b top, and burner block described in the present embodiment is a wedge brick.
Body of heater 1 outside surface is coated with thermal insulation layer 15 described in
present embodiment.
In the quenching device 2 quenching oil 16 is housed described in
present embodiment, fuel head is lower than the discharge port height.
The principle of work of
present embodiment is following: when original state; Charging baffle plate 12 is opened; Discharge baffle 6 is all closed with middle baffle plate 13; Abrading-ball 17 gets into preheating chute section 1a through feeding mouth, through preheating chute section 1a the time, can accept the preheating by the high-temperature flue gas of burning generation.Abrading-ball 17 is through after the preheatings, and middle baffle plate 13 is opened, and the abrading-ball 17 preheating chute section 1a that rolls out gets into the flat section of an even heating 1b, this moment discharge baffle 6 closures, abrading-ball 17 is blocked by discharge baffle 6, can't continue to move.After the flat section of even heating 1b was filled up by abrading-ball 17, middle baffle plate 13 was all closed with charging baffle plate 12.Abrading-ball 17 is after the flat section of even heating 1b heating finishes; Through the rotation of cam 7, drive discharge baffle 6 and descend, abrading-ball 17 is rolled out by discharge port; Crash in the quenching oil 16 of quenching device 2; Middle baffle plate 13 is also opened with charging baffle plate 12 simultaneously, and new a collection of abrading-ball 17 gets into preheating chute section 1a by charging baffle plate 12, and the abrading-ball 17 that is trapped on last stage in the preheating chute section 1a then gets into the flat section of even heating 1b.Simultaneously, got in the furnace chamber through discharge port by the high temperature oil steam that quench to produce, flat flame burner 4 near and air mixed, quilt is lighted, and has served as part of fuel.The high-temp waste gas that burning produces is discharged from smoke outlet 14 through preheating chute section 1a.Discharge baffle 6 periodic opening and closing; Though it can block moving of abrading-ball 17, does not overlap sealing with twere, therefore; Even discharge baffle 6 is in closing condition; The a large amount of oil vapours that produce in the quenching process so will be transferred in the body of heater 1 through the gap of discharge baffle 6 with twere, and abrading-ball 17 is carried out preheating.
Embodiment 2:
In
present embodiment, two flameless gas burners that above the flat section of said even heating 1b, laterally arrange, promptly the body of heater combustion technology has been used flameless combustion technology.In addition; In conjunction with shown in Figure 5; The driving mechanism for switch of discharging described in the present embodiment is for driving the pedal rod mechanism that discharge baffle 6 is gone up and down, and this pedal rod mechanism comprises that being zigzag articulates pedal 8, mobile jib 9 and the drive plate 10 that links to each other, and said drive plate 10 tops and discharge baffle 6 offset; Be provided with spring 11 between said pedal 8 and the ground, and also be connected with spring 11 between drive plate 10 and the body of heater 1.In the time of in working order, tramp with one's feet and step on the pedal 8 in the body of heater outside, drive mobile jib 9 and drive plate 10 interlocks, can be with discharge baffle 6 jack-up, discharge port is closed.After the completion to be heated, unclamp pedal 8, then discharge port is opened.By cam gear, this pedal rod mechanism is more convenient and practical in the embodiment 1.
present embodiment all the other with embodiment 1.
Only be the concrete exemplary applications of the utility model more than
, the protection domain of the utility model is not constituted any limitation.Except that the foregoing description, the utility model can also have other embodiment.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop within the utility model scope required for protection.
Claims (1)
1. the special-purpose finishing stove of
a kind of novel abrading-ball comprises body of heater (1), quenching device (2) and fume extractor (3), and said fume extractor (3) is located at body of heater (1) front end; It is characterized in that: said quenching device (2) is tightly connected with the discharge port of body of heater (1), and said body of heater (1) discharge port is provided with the discharging switch and drives the discharging driving mechanism for switch that the discharging switch is done the periodicity folding.
The special-purpose finishing stove of
a kind of novel abrading-ball 2. according to claim 1; It is characterized in that said body of heater (1) is made up of the preheating chute section (1a) that fuses and the flat section of even heating (1b) two portions; The front end of said preheating chute section (1a) is provided with the opening for feed of body of heater (1), and the discharge port of said body of heater (1) is positioned at the end of the flat section of even heating (1b).
The special-purpose finishing stove of
a kind of novel abrading-ball 3. according to claim 2; It is characterized in that the opening for feed of said body of heater (1) is provided with the charging driving mechanism for switch of charging switch and the folding of driving charging switch, and also be provided with the intermediate switch drive unit of intermediate switch and the folding of driving intermediate switch between the flat section of preheating chute section (1a) and even heating (1b).
The special-purpose finishing stove of
a kind of novel abrading-ball 4. according to claim 3; The top that it is characterized in that the flat section of said even heating (1b) laterally arrange some flat flame burners (4) or flameless gas burner, the air-flow sense of rotation of adjacent flat flame burner nozzle (4) or adjacent flameless gas burner is opposite; And the spout corresponding to each flat flame burner (4) or flameless gas burner is provided with the burner block (5) that possesses the air-flow guide effect on the furnace wall at the flat section of said even heating (1b) top.
The special-purpose finishing stove of
a kind of novel abrading-ball 5. according to claim 1; It is characterized in that said discharging switch is discharge baffle (6); Said discharging driving mechanism for switch comprises the cam (7) that drives discharge baffle (6) up-down, and said cam (7) is provided with rocking handle or said cam (7) rotating shaft links to each other with motor; Perhaps, said discharging driving mechanism for switch is for connecting and drive the stepper-motor of discharge baffle (6) up-down; Perhaps; Said discharging driving mechanism for switch is for driving the pedal rod mechanism that discharge baffle (6) is gone up and down; This pedal rod mechanism comprises that being zigzag articulates pedal (8), mobile jib (9) and the drive plate (10) that links to each other; Said drive plate (10) top and discharge baffle (6) offset, and are provided with spring (11) between said pedal (8) and the ground, and also are connected with spring (11) between drive plate (10) and the body of heater (1); Perhaps said discharging driving mechanism for switch is for connecting and drive the motor of discharge baffle (6) upset.
The special-purpose finishing stove of
a kind of novel abrading-ball 6. according to claim 3; It is characterized in that said charging switch is charging baffle plate (12); Said charging driving mechanism for switch comprises the cam that drives charging baffle plate (12) up-down, and said cam is provided with rocking handle or said cam shaft links to each other with motor; Perhaps, said charging driving mechanism for switch is for connecting and drive the stepper-motor of charging baffle plate (12) up-down; Perhaps; Said charging driving mechanism for switch is for driving the pedal rod mechanism that charging baffle plate (12) goes up and down; This pedal rod mechanism comprises that being zigzag articulates pedal, mobile jib and the drive plate that links to each other, and said drive plate top and charging baffle plate (12) offset, and are provided with spring between said pedal and the ground; And also being connected with spring between drive plate and the body of heater, perhaps said charging driving mechanism for switch is for connecting and drive the motor of charging baffle plate (12) upset; And said intermediate switch is middle baffle plate (13), and said intermediate switch drive unit comprises the cam that drives middle baffle plate (13) up-down, and said cam is provided with rocking handle or said cam shaft links to each other with motor; Perhaps, said intermediate switch drive unit is for connecting and drive the stepper-motor of middle baffle plate (13) up-down; Perhaps; Said intermediate switch drive unit is for driving the pedal rod mechanism that middle baffle plate (13) is gone up and down; This pedal rod mechanism comprises that being zigzag articulates pedal, mobile jib and the drive plate that links to each other, and said drive plate top and middle baffle plate (13) offset, and are provided with spring between said pedal and the ground; And also being connected with spring between drive plate and the body of heater, perhaps said intermediate switch drive unit is for connecting and drive the motor of charging baffle plate (13) upset.
The special-purpose finishing stove of
a kind of novel abrading-ball 7. according to claim 2; It is characterized in that said fume extractor comprises the smoke outlet of being located on preheating chute section (1a) the front top furnace wall (14), this smoke outlet also is provided with vacuum fan on (14).
8. according to claim 1 or the special-purpose finishing stove of 2 described a kind of novel abrading-balls, is characterized in that said body of heater (1) outside surface is coated with thermal insulation layer (15).
The special-purpose finishing stove of
a kind of novel abrading-ball 9. according to claim 1 and 2 is characterized in that quenching oil (16) is housed in the said quenching device (2), and fuel head is lower than the discharge port height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120072680U CN202148336U (en) | 2011-03-18 | 2011-03-18 | Novel special processing furnace for grinding balls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120072680U CN202148336U (en) | 2011-03-18 | 2011-03-18 | Novel special processing furnace for grinding balls |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202148336U true CN202148336U (en) | 2012-02-22 |
Family
ID=45589402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120072680U Expired - Lifetime CN202148336U (en) | 2011-03-18 | 2011-03-18 | Novel special processing furnace for grinding balls |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202148336U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206734A (en) * | 2011-03-18 | 2011-10-05 | 苏州安科节能技术有限公司 | Novel quenching furnace |
| CN103537696A (en) * | 2013-10-16 | 2014-01-29 | 宜兴市炜华合金材料有限公司 | Tubular stove assembly and using method thereof |
| CN104372159A (en) * | 2014-11-19 | 2015-02-25 | 江阴东邦钢球机械有限公司 | Steel ball reheating furnace |
| CN104372145A (en) * | 2014-11-19 | 2015-02-25 | 江阴东邦钢球机械有限公司 | Control structure of heating chamber of steel ball reheating furnace |
| CN105671293A (en) * | 2016-01-29 | 2016-06-15 | 安徽省凤形耐磨材料股份有限公司 | Heating device used for casting grinding balls |
| CN106636595A (en) * | 2016-12-27 | 2017-05-10 | 重庆市永川区望城机械厂 | Planet rack tempering furnace |
| CN108004379A (en) * | 2017-11-30 | 2018-05-08 | 宁波德深机械设备有限公司 | The application method of quenching unit |
| CN108048635A (en) * | 2017-11-30 | 2018-05-18 | 宁波德深机械设备有限公司 | Quenching unit |
-
2011
- 2011-03-18 CN CN201120072680U patent/CN202148336U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206734A (en) * | 2011-03-18 | 2011-10-05 | 苏州安科节能技术有限公司 | Novel quenching furnace |
| CN102206734B (en) * | 2011-03-18 | 2013-01-09 | 苏州安科节能技术有限公司 | Novel grinding quenching furnace |
| CN103537696A (en) * | 2013-10-16 | 2014-01-29 | 宜兴市炜华合金材料有限公司 | Tubular stove assembly and using method thereof |
| CN104372159A (en) * | 2014-11-19 | 2015-02-25 | 江阴东邦钢球机械有限公司 | Steel ball reheating furnace |
| CN104372145A (en) * | 2014-11-19 | 2015-02-25 | 江阴东邦钢球机械有限公司 | Control structure of heating chamber of steel ball reheating furnace |
| CN105671293A (en) * | 2016-01-29 | 2016-06-15 | 安徽省凤形耐磨材料股份有限公司 | Heating device used for casting grinding balls |
| CN106636595A (en) * | 2016-12-27 | 2017-05-10 | 重庆市永川区望城机械厂 | Planet rack tempering furnace |
| CN108004379A (en) * | 2017-11-30 | 2018-05-08 | 宁波德深机械设备有限公司 | The application method of quenching unit |
| CN108048635A (en) * | 2017-11-30 | 2018-05-18 | 宁波德深机械设备有限公司 | Quenching unit |
| CN108004379B (en) * | 2017-11-30 | 2019-01-25 | 宁波德深机械设备有限公司 | The application method of quenching unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120222 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |