CN114393519A - Target distance adjustable nozzle and method suitable for grinding material water jet flow steel rail grinding - Google Patents
Target distance adjustable nozzle and method suitable for grinding material water jet flow steel rail grinding Download PDFInfo
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- CN114393519A CN114393519A CN202111588201.4A CN202111588201A CN114393519A CN 114393519 A CN114393519 A CN 114393519A CN 202111588201 A CN202111588201 A CN 202111588201A CN 114393519 A CN114393519 A CN 114393519A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention discloses a target distance adjustable nozzle and a method suitable for grinding a steel rail by abrasive water jet, wherein the nozzle comprises a nozzle main body, an outer cover, a lower baffle, a support frame and an upper baffle which are arranged on the same central axis, the nozzle main body is connected with the upper baffle through threads, and the nozzle target distance can be adjusted by screwing the nozzle main body to displace; the outer cover, the lower baffle and the support frame are sleeved on the nozzle main body to limit the radial displacement of the nozzle main body; a pressure sensor is arranged between the nozzle main body and the support frame, a spring is arranged between the support frame and the upper baffle, the elastic coefficient of the spring is measured through a gradiometer and a read pressure value, the upper computer generates a pressure-displacement curve comparison table according to the elastic coefficient, after the adjusting distance required by the nozzle for adjusting the optimal target distance is measured, the upper computer gives a pressure threshold value, and the nozzle main body is screwed to enable the pressure exerted on the spring to reach the threshold value, so that the adjusting work of the optimal target distance can be completed; the nozzle of the invention can be independently adjusted, the target distance accuracy of other nozzles is not influenced, the operation method is simple, and the target distance adjustment accuracy is high.
Description
Technical Field
The embodiment of the invention belongs to the technical field of abrasive water jet polishing, and particularly relates to a target distance adjustable nozzle and a method suitable for abrasive water jet steel rail polishing.
Background
With the construction and operation of high-speed rail in China, the maintenance of high-speed rail becomes an important subject. At present, the main mode of rail grinding is to repair the damage of the surface of the rail by grinding the metal on the surface of the rail through a grinding wheel. However, the conventional grinding wheel grinding method has many disadvantages, and the most important problems include thermal influence and low machining precision. Therefore, researchers have studied how to grind the rails. The high-pressure abrasive water jet technology has the advantages of high processing efficiency, simple structure, convenience in control and the like, and is widely applied to cutting and drilling, so that the high-pressure abrasive water jet technology has a better prospect when being applied to steel rail polishing.
Patent CN111843857A discloses a grinding device and method are united with pure water efflux to track superhigh pressure abrasive material efflux, can combine abrasive material efflux and pure water efflux, when keeping the rail sclerosis layer, has improved the quality of polishing.
In this patent, carry on single nozzle on the arm to adjust the target distance and the efflux incident angle of nozzle through the arm, nevertheless adopt the nozzle quantity that this kind of technical scheme's device carried to be less, the cost is higher, and efficiency of polishing is lower, consequently can adjust the optimum target distance of a plurality of nozzles through carrying on the different nozzles of a plurality of efflux incident angles on same arm, and then can carry out the work of polishing to the rail simultaneously, improved the efficiency of polishing of whole device. Among this kind of technical scheme, because the rail is polished and is generally gone on the railway, the space is little, and the operable position is limited, and adopt many shower nozzles to polish the rail in coordination, it is comparatively inconvenient to single nozzle regulation, thereby need constantly adjust according to measured data and reach optimum target distance, and work load is great and more loaded down with trivial details, adjusts the target distance through the arm to single nozzle simultaneously and can drive other nozzle position changes, makes other nozzle target distance accuracy reduce, can lead to polishing the mistake. Therefore, a nozzle which can accurately and independently adjust the target distance and has simple target distance adjusting process is designed, and the method has important significance for popularization and significance for steel rail grinding.
Disclosure of Invention
Aiming at the problems that the nozzle in the prior art cannot be independently adjusted and the adjusting operation is complicated, the invention provides the target distance adjustable nozzle which can be independently adjusted and is simple to operate.
In order to achieve the above object, the present invention provides an adjustable target distance nozzle suitable for abrasive water jet rail grinding, comprising: the nozzle comprises a nozzle main body, an outer cover, a lower baffle, a support frame and an upper baffle, wherein the nozzle main body, the outer cover, the lower baffle, the support frame and the upper baffle are arranged on the same central axis, the support frame, the lower baffle and the outer cover are sequentially sleeved on the nozzle main body and limit the radial displacement of the nozzle main body, the outer cover is fixedly connected with the upper baffle, the nozzle main body is connected with the upper baffle through threads, and the nozzle main body is screwed to generate displacement, so that the target distance between the nozzle main body and a steel rail is changed; the pressure sensor is arranged between the nozzle main body and the support frame, the spring is arranged between the support frame and the upper baffle, the pressure value is measured through the displacement value of the nozzle main body and the pressure sensor, and the upper computer calculates the elastic coefficient of the spring and generates a pressure-displacement curve comparison table; the upper computer generates a pressure threshold value according to a pressure-displacement curve comparison table and the optimal target distance by measuring the distance value between the nozzle and the steel rail, and the nozzle body is screwed to enable the pressure value detected by the pressure sensor to reach the pressure threshold value, so that the adjustment work of the target distance is completed.
Further, the dustcoat top is equipped with second annular step portion, the bottom plate top is equipped with fourth annular step portion, the support frame top is equipped with fifth annular step portion, wherein the internal diameter of second annular step portion, fourth annular step portion and fifth annular step portion is the same with the external diameter of nozzle main part.
Furthermore, go up baffle bottom and run through and be equipped with the honeycomb duct, its top outside is equipped with first external screw thread, first external screw thread with the first internal thread phase-match that nozzle body bottom inboard was equipped with.
Further, fifth annular step portion side is equipped with the gradiometer standing groove, overhead gage bottom and side run through respectively and are equipped with the gradiometer via hole and the gradiometer observation hole, wherein the central point that gradiometer standing groove, gradiometer via hole and gradiometer observation hole are in with the cross section with the central axis of overhead gage, and the gradiometer passes the gradiometer via hole and contradicts to the gradiometer standing groove bottom, reads out nozzle body displacement distance through locating the interior scale pointer of gradiometer observation hole.
Furthermore, the outer cover also comprises a first annular step part arranged at the bottom of the outer cover, and a second internal thread is arranged on the inner side of the first annular step part; the upper baffle plate also comprises an outer side baffle plate part arranged at the top, and a second external thread is arranged on the outer side of the top of the outer side baffle plate part; through the matching of the second internal thread and the second external thread, the outer cover is fixedly connected with the upper baffle plate.
Further, the lower baffle plate further comprises a third annular step portion arranged at the bottom, the outer diameter of the third annular step portion is the same as the inner diameter of the first annular step portion, and the inner diameter of the third annular step portion is the same as the outer diameter of the fifth annular step portion.
Furthermore, the bottom of the fourth annular step part is provided with a positioning groove, and the top of the outer side baffle part is provided with a positioning bump corresponding to the positioning groove.
Furthermore, the bottom of the support frame is provided with a sixth annular step part, the inner diameter of the sixth annular step part is the same as the outer diameter of the flow guide pipe, and the bottom of the sixth annular step part is provided with a spring connector.
Further, a sensor wire through hole penetrates through the scale placing groove.
According to another aspect of the invention, there is provided a target distance adjustable method suitable for abrasive water jet rail grinding, comprising the steps of:
s1: inserting a gradiometer into the gradiometer placing groove, screwing the nozzle body to displace for a set distance, calibrating the elastic coefficient of a single nozzle by the upper computer according to the pressure value, and simultaneously generating a pressure-displacement curve comparison table;
s2: the distance meter measures the distance value between a single nozzle and the steel rail;
s3: the upper computer calculates the distance to be adjusted of a single nozzle according to the measured distance value and the optimal target distance, and generates a pressure threshold value according to a pressure-displacement curve comparison table;
s4: the nozzle body is screwed to enable the pressure value detected by the pressure sensor to reach a pressure threshold value, and the upper computer gives a prompt and completes the adjustment of the target distance.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) according to the adjustable target distance nozzle suitable for grinding the abrasive water jet steel rail, the first external thread is screwed into the first internal thread arranged on the inner side of the bottom of the nozzle main body, the relative distance between the flow guide pipe and the nozzle main body can be adjusted, so that the target distance between the nozzle and the steel rail can be adjusted, the target distance is prevented from being controlled by a mechanical arm, when multiple nozzles work cooperatively, the unpredictable effect that other nozzles are driven to move due to the movement of a single nozzle can be avoided, the cooperative accuracy of the multiple nozzles can be improved, and the grinding quality of the steel rail can be ensured; the pressure-displacement curve comparison table is generated under the calculation of the upper computer by arranging the pressure sensor and the spring, the adjustment work of the optimal target distance can be completed only by screwing the nozzle main body to enable the pressure applied to the spring to reach a threshold value, the operation method is simple, and the target distance adjustment precision is high.
(2) According to the adjustable target distance nozzle suitable for grinding the abrasive water jet steel rail, the first annular step part, the third annular step part and the fifth annular step part are arranged, the inner diameters of the first annular step part, the third annular step part and the fifth annular step part are consistent with the outer diameter of the nozzle main body, the radial displacement of the nozzle main body can be limited after assembly is completed, and the problem that under the high-speed impact of the abrasive water jet, the nozzle main body vibrates to cause the looseness of the connection between the nozzle main body and the first external thread, so that the axial displacement is generated, the target distance of the nozzle is changed, and the target distance precision of the nozzle is influenced is avoided.
(3) The nozzle capable of accurately adjusting the target distance, which is suitable for grinding the steel rail by using the abrasive water jet, has the advantages of simple structure, easiness in assembly, small required space and high adjustment accuracy, can play a greater role in a narrow space for grinding the steel rail, and improves the working efficiency.
(4) According to the adjustable target distance nozzle suitable for grinding the steel rail by the abrasive water jet, the pressure sensor is arranged, so that when the target distance is changed due to loose connection of the nozzle main body in the grinding process, an upper computer can remind an operator to correct the target distance in time according to the pressure change, excessive grinding of the steel rail is avoided, and the grinding precision is further guaranteed.
Drawings
FIG. 1 is a schematic cross-sectional view of an adjustable target distance nozzle suitable for abrasive water jet rail grinding in an embodiment of the invention;
FIG. 2 is a schematic structural diagram of an adjustable-target-distance nozzle suitable for grinding a steel rail by abrasive water jet in the embodiment of the invention;
FIG. 3 is an exploded view of an adjustable target distance nozzle suitable for abrasive water jet rail grinding in accordance with an embodiment of the present invention;
FIG. 4 is a schematic structural view of a nozzle in an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an outer cover in an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a lower baffle plate in an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a support frame according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of an upper baffle plate in an embodiment of the present invention
FIG. 9 is a schematic flow chart of a target distance adjusting method suitable for rail grinding by abrasive water jet in the embodiment of the invention;
in all the figures, the same reference numerals denote the same features, in particular: 1-nozzle body, 101-first internal thread, 2-housing, 21-first annular step portion, 22-second annular step portion, 221-second internal thread, 3-lower baffle, 31-third annular step portion, 32-fourth annular step portion, 311-positioning groove, 4-pressure sensor, 5-support frame, 51-fifth annular step portion, 52-sixth annular step portion, 511-scale placing groove, 512-sensor wire passing hole, 6-upper baffle, 61-outer baffle portion, 611-second external thread, 612-positioning projection, 613-scale observation hole, 614-scale pointer, 62-draft tube, 621-first external thread, 622-third external thread, 63-bottom annular baffle portion, 631-scale via, 7-spring, 8-scale.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1-8, the present invention provides a target distance adjustable nozzle suitable for rail grinding by abrasive water jet, which comprises a nozzle main body 1, an outer cover 2, a lower baffle 3, a support frame 5 and an upper baffle 6, which are arranged on the same central axis, wherein the nozzle main body 1 sequentially passes through the outer cover 2 and the lower baffle 3, and is connected with a flow guide pipe 62 arranged on the upper baffle 6 through a first internal thread 101 arranged on the inner side of the lower end of the nozzle main body, and the abrasive water jet can enter the nozzle main body 1 through the flow guide pipe 62 and then is ejected out to grind the rail; the outer cover 2 is sleeved on the lower baffle 3 and is fixedly connected with the upper baffle 6; the lower baffle 3 is sleeved on the support frame 5 and limits the support frame 5 in the upper baffle 6, the bottom of the support frame 5 is connected with the upper baffle 6 through a spring 7, a gradiometer placing groove 511 and a gradiometer through hole 631 are respectively arranged at corresponding positions of one side of the support frame 5 and the bottom of the upper baffle 6, a gradiometer 8 can be placed in the gradiometer placing groove 511 through the gradiometer through hole 631, the nozzle body 1 is screwed, and the displacement distance of the nozzle body 1 can be accurately observed through a gradiometer observation hole 613 arranged at one side of the upper baffle 6; further, the nozzle body 1 bottom is contradicted with support frame 5, is equipped with pressure sensor 4 between the two, and it links to each other with host computer communication, can measure the elasticity coefficient of spring 7 through cooperating with gradiometer 8, generates "pressure-displacement curve look at table" simultaneously, and the host computer measures the required adjusting distance of the required optimum target distance of adjusting of every nozzle according to laser range finder, and generates the pressure threshold value, during the adjustment, only need twist nozzle body 1 and reach and set for the pressure threshold value, and the host computer gives the suggestion can accomplish the regulation work of optimum target distance, need not constantly repeatedly to adjust according to measured data. The nozzle has the advantages of simple target distance adjustment operation, high precision, independent operation and no influence on other nozzles.
As shown in fig. 4, the nozzle body 1 includes a conical portion at an upper end and a cylindrical portion at a lower end, a nozzle hole is formed at a top of the conical portion, an abrasive water jet is emitted from the nozzle hole to polish a rail, a first internal thread 101 is formed inside a bottom of the cylindrical portion, and a target distance of the nozzle body 1 is adjustable by the first internal thread 101.
As shown in fig. 5, the outer cover 2 is a cylindrical structure, and includes a first annular step portion 21 and a second annular step portion 22 disposed on the top of the first annular step portion 21, wherein the inner diameter of the second annular step portion 22 is the same as the outer diameter of the nozzle body 1, and the radial displacement of the nozzle body 1 can be limited; the inner diameter of the first annular step portion 21 is the same as the outer diameter of the upper baffle 6, and the first annular step portion is fixedly connected with the upper baffle 6 by a second internal thread 221 arranged on the inner side of the bottom of the first annular step portion.
As shown in fig. 6, the lower baffle 3 is a cylindrical structure, and includes a third annular step portion 31 and a fourth annular step portion 32 disposed on the top of the third annular step portion 31, the outer diameter of the third annular step portion 31 is the same as the outer diameter of the upper baffle 6, wherein the inner diameter of the fourth annular step portion 32 is the same as the outer diameter of the nozzle body 1, and the radial displacement of the nozzle body 1 is limited; the inner diameter of the third annular step part 31 is the same as the outer diameter of the support frame 5, and the third annular step part can be sleeved on the support frame 5 to limit the support frame 5 in the upper baffle 6; the third annular step 31 has a plurality of positioning slots 311 formed in the bottom thereof in the circumferential direction, and the positioning slots are engaged with the positioning protrusions 614 formed on the top of the upper baffle 6, so as to prevent the radial rotation of the lower baffle 3 and maintain the tight engagement therebetween.
As shown in fig. 7, the supporting frame 5 is a cylindrical structure, and includes a fifth annular step portion 51 and a sixth annular step portion 52, the outer diameter of the fifth annular step portion 51 is the same as the inner diameter of the third annular step portion 31, the inner diameter thereof is the same as the outer diameters of the sixth annular step portion 52 and the nozzle body 1, and the radial displacement of the nozzle body 1 can be limited; a scale placing groove 511 is formed in the outer side of the fifth annular step part 51, a sensor lead through hole 512 penetrating through the side wall of the fifth annular step part 51 is formed in the scale placing groove 511, and a sensor lead can pass through the sensor lead through hole 512 and be wired along the scale placing groove 511 so as to be in communication connection with an upper computer; the inner diameter of the sixth annular step portion 52 is the same as the inner diameter of the draft tube 62, and the support frame 5 can be sleeved on the draft tube 62 through the sixth annular step portion 52; further, the bottom of the sixth annular step portion 52 is further provided with a spring connection interface, and the spring 7 can be accessed to realize connection with the upper baffle 6.
As shown in fig. 8, the upper baffle 6 includes an outer baffle 61 with a cylindrical structure, a bottom annular baffle 63 disposed at the bottom of the outer baffle 61, and a fluid guide pipe 62 penetrating the bottom annular baffle 63, wherein a second external thread 611 is disposed on the outer side of the top of the outer baffle 61, a positioning protrusion 612 is circumferentially disposed on the top, the positioning protrusion 612 is embedded in a positioning groove 311 disposed at the bottom of the lower baffle 3, and the second external thread 611 is screwed into a second internal thread 221 disposed on the inner side of the bottom of the outer cover 2, so that the outer cover 2, the lower baffle 3, and the upper baffle 6 are tightly connected; a scale observation hole 613 is further formed in the side wall of the outer baffle portion 61 in a penetrating manner, a scale pointer 614 is arranged in the observation hole 613, and the scale position 8 displacement distance can be accurately observed and judged through the scale observation hole 613 and the scale pointer 614. A graduator through hole 631 penetrates through the bottom annular baffle part 63 and is close to the inner wall surface of the outer baffle part 61, the central points of the observation hole 613 and the graduator observation hole 613 are in the same section with the central axis of the upper baffle 6, and when a graduator 7 passes through the graduator through hole 631 and abuts against the bottom of the graduator placing groove 511, the displacement distance of the nozzle body 1 can be read through a scale pointer 614 arranged in the graduator observation hole 613; the top of the bottom annular baffle 63 is provided. The outer side of the top of the guide pipe 62 is provided with a first external thread 621, the first external thread 621 is screwed into the first internal thread 101 arranged on the inner side of the bottom of the nozzle body 1, the relative distance between the guide pipe 62 and the nozzle body 1 can be adjusted, and further the target distance between the nozzle and the steel rail is adjusted; the outer side of the bottom of the diversion pipe 62 is provided with a first external thread 621, and the diversion pipe 62 and the abrasive water jet delivery pipeline can be fixedly connected through the first external thread 621.
When the nozzle with the adjustable target distance is assembled, the pressure sensor 4 is firstly placed at the top of the sixth annular step part 52 of the support frame 5, the lead of the pressure sensor passes through the sensor lead through hole 512 and is placed along the scale placing groove 511 in a flat and attached mode, and then the top of the bottom annular baffle part 63 passes through the scale through hole 631 to be connected with an upper computer in a communication mode, the lead can be tightly attached to the scale placing groove 511 through an adhesive tape or glue, and the scale 8 is prevented from being prevented from extending into the lead; after the pressure sensor 4 is assembled, the support frame 5 and the upper baffle 6 are connected through the spring 7, and the support frame 5 is sleeved on the guide pipe 62; the bottom of the nozzle body 1 is pressed on the pressure sensor 4 and is connected with the guide pipe 62 through a first internal thread 101; the lower baffle plate is sleeved on the nozzle body 1, and the positioning groove 611 at the bottom of the lower baffle plate is embedded on the positioning lug 612 at the top of the upper baffle plate 6; the outer cover 2 penetrates through the nozzle body 1 and is sleeved on the lower baffle 3 and is fixedly connected with the upper baffle 6 through the second internal thread 221, and the assembly work of the target distance adjustable nozzle is completed.
In the embodiment of the present invention, the inner diameters of the second annular step portion 22, the fourth annular step portion 32, and the fifth annular step portion 51 are all the same as the outer diameter of the nozzle body 1, and the radial displacement of the nozzle body 1 can be limited after the assembly is completed, so as to avoid that the nozzle body 1 vibrates to cause the connection looseness along the first external thread 621 to generate the axial displacement under the high-speed impact of the abrasive water jet, so that the target distance of the nozzle changes, and the target distance precision of the nozzle is affected. In the embodiment of the invention, the support frame 5, the lower baffle plate 3 and the outer cover 2 are sequentially sleeved on the nozzle main body 1, so that the integral nozzle is tightly connected, the stability of the nozzle is improved, and meanwhile, the nozzle main body 1 can be movably screwed to adjust the target distance by matching the first internal thread 101 with the first external thread 621.
In the embodiment of the invention, the pressure sensor 4 can adopt an annular through hole flexible resistance film pressure sensor, has high precision and short response time, and can accurately detect the pressure change applied by the spring 7 when the nozzle body 1 is screwed. Before adjusting the target distance, a gradiometer 8 can be inserted into the gradiometer placing groove 511, the nozzle body 1 is screwed to displace for a specified distance (can be observed from the gradiometer observing hole 613 and can be judged according to the scale pointer 614), the upper computer records the measured pressure value at the moment and calculates the elastic coefficient of the spring 7 according to the specified displacement distance, and the calibration work before polishing is completed; after the angle adjustment of the plurality of nozzles is completed, the distance between a single nozzle and a steel rail is measured according to the distance meter, the upper computer obtains the required adjustment distance of the optimal target distance of the single nozzle, the pressure threshold value required to be applied by the spring 7 is calculated according to the elastic coefficient of the single nozzle, the nozzle main body 1 with the corresponding number is screwed, and the upper computer gives a prompt to complete the target distance adjustment of the nozzle after the pressure threshold value is reached. After the target distance is adjusted, the nozzle can spray abrasive water jet to polish the steel rail, the upper computer can adjust the mechanical arm feeding speed and the flow and the jet pressure of the abrasive water jet according to the surface condition of the steel rail, the target distance and the angle of the nozzle do not need to be adjusted again, the polishing mode is simpler, the fault rate of the whole polishing device is reduced, and the polishing efficiency is improved. When the nozzle body 1 is connected loosely and leads to the target distance to change in the polishing process, the host computer has in time reminded operating personnel to revise according to pressure change, avoids causing excessive polishing to the rail, has further guaranteed the precision of polishing.
As shown in fig. 9, the present invention further provides a target distance adjustable method suitable for rail grinding by abrasive water jet, comprising the following steps:
s1: inserting a gradiometer 8 into the gradiometer placing groove 511, screwing the nozzle body 1 to displace for a set distance, calibrating the elastic coefficient of a single nozzle by the upper computer according to the pressure value, and simultaneously generating a pressure-displacement curve comparison table;
s2, measuring the distance value between the single nozzle and the steel rail by a distance measuring instrument;
s3: the upper computer calculates the distance to be adjusted of a single nozzle according to the measured distance value and the optimal target distance, and generates a pressure threshold value according to a pressure-displacement curve comparison table;
s4: the nozzle body 1 is screwed to enable the pressure value detected by the pressure sensor to reach a pressure threshold value, and the upper computer gives a prompt and completes the adjustment of the target distance.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An adjustable target distance nozzle suitable for abrasive water jet rail grinding, comprising:
the nozzle comprises a nozzle main body (1), an outer cover (2), a lower baffle plate (3), a support frame (5) and an upper baffle plate (6) which are arranged on the same central axis, wherein the support frame (5), the lower baffle plate (3) and the outer cover (2) are sequentially sleeved on the nozzle main body (1) and limit the radial displacement of the nozzle main body, the outer cover (2) is fixedly connected with the upper baffle plate (6), the nozzle main body (1) is connected with the upper baffle plate (6) through threads, and the nozzle main body (1) is screwed to generate displacement, so that the target distance between the nozzle main body and a steel rail is changed;
the pressure sensor (4) is arranged between the nozzle main body (1) and the support frame (5), the spring (7) is arranged between the support frame (5) and the upper baffle (6), the displacement value of the nozzle main body (1) and the pressure value measured by the pressure sensor (4) are used for calculating the elastic coefficient of the spring (7) by the upper computer and generating a pressure-displacement curve comparison table;
the upper computer generates a pressure threshold value according to a pressure-displacement curve comparison table and the optimal target distance by measuring the distance value between the nozzle and the steel rail, and the nozzle main body (1) is screwed to enable the pressure value detected by the pressure sensor to reach the pressure threshold value, so that the adjustment work of the target distance is completed.
2. The adjustable target distance nozzle suitable for abrasive water jet rail grinding according to claim 1, wherein a second annular step part (22) is arranged on the top of the outer cover (2), a fourth annular step part (32) is arranged on the top of the lower baffle (3), a fifth annular step part (51) is arranged on the top of the support frame (5), and the inner diameters of the second annular step part (22), the fourth annular step part (32) and the fifth annular step part (51) are the same as the outer diameter of the nozzle body (1).
3. The adjustable target distance nozzle suitable for grinding steel rails by abrasive water jet according to claim 2, wherein a guide pipe (62) is arranged at the bottom of the upper baffle (6) in a penetrating manner, a first external thread (621) is arranged on the outer side of the top of the upper baffle, and the first external thread (621) is matched with a first internal thread (101) arranged on the inner side of the bottom of the nozzle body (1).
4. The adjustable target distance nozzle suitable for grinding the abrasive water jet steel rail is characterized in that a scale placing groove (511) is formed in the side edge of the fifth annular step part (51), a scale through hole (631) and a scale observation hole (613) are respectively formed in the bottom and the side edge of the upper baffle plate (6) in a penetrating mode, the center points of the scale placing groove (511), the scale through hole (631) and the scale observation hole (613) are located in the same section plane with the central axis of the upper baffle plate (6), a scale (8) penetrates through the scale through hole (631) to abut against the bottom of the scale placing groove (511), and the displacement distance of the nozzle body (1) is read through a scale pointer (614) arranged in the scale observation hole (613).
5. The adjustable target distance nozzle suitable for abrasive water jet rail grinding according to claim 4, wherein the outer cover (2) further comprises a first annular step part (21) arranged at the bottom of the outer cover, and a second internal thread (221) is arranged on the inner side of the bottom of the first annular step part (21); the upper baffle (6) further comprises an outer baffle part (61) arranged at the top, and second external threads (611) are arranged on the outer side of the top of the outer baffle part (61); the outer cover (2) is fixedly connected with the upper baffle (6) through matching the second internal thread (221) and the second external thread (611).
6. The adjustable target distance nozzle suitable for abrasive water jet rail grinding according to claim 5, wherein the lower baffle (3) further comprises a third annular step portion (31) provided at the bottom, the outer diameter of the third annular step portion is the same as the inner diameter of the first annular step portion (21), and the inner diameter of the third annular step portion is the same as the outer diameter of the fifth annular step portion (51).
7. The adjustable target distance nozzle suitable for abrasive water jet rail grinding according to claim 6, wherein the bottom of the fourth annular step portion (31) is provided with a positioning groove (311), and the top of the outer baffle portion (61) is provided with a positioning bump (612) corresponding to the positioning groove (311).
8. The adjustable target distance nozzle suitable for grinding steel rails by abrasive water jet according to claim 7, wherein the bottom of the support frame (5) is provided with a sixth annular step part (52) with the same inner diameter as the outer diameter of the guide pipe, and the bottom of the support frame is provided with a spring connector.
9. The adjustable target distance nozzle suitable for abrasive water jet rail grinding according to claim 8, wherein a sensor wire through hole (512) is arranged on the scale placing groove (511) in a penetrating mode.
10. A method for adjusting the target distance for grinding a steel rail by abrasive water jet, which is realized by applying the adjustable target distance nozzle suitable for grinding the steel rail by abrasive water jet according to any one of claims 1 to 9, and comprises the following steps:
s1: inserting a gradiometer (8) into a gradiometer placing groove (511), screwing the nozzle body (1) to displace for a set distance, calibrating the elastic coefficient of a single nozzle by an upper computer according to a pressure value, and simultaneously generating a pressure-displacement curve comparison table;
s2, measuring the distance value between the single nozzle and the steel rail by a distance measuring instrument;
s3: the upper computer calculates the distance to be adjusted of a single nozzle according to the measured distance value and the optimal target distance, and generates a pressure threshold value according to a pressure-displacement curve comparison table;
s4: the nozzle body (1) is screwed to enable the pressure value detected by the pressure sensor to reach a pressure threshold value, and the upper computer gives a prompt and completes the adjustment of the target distance.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111588201.4A CN114393519B (en) | 2021-12-23 | 2021-12-23 | Target distance adjustable nozzle and method suitable for grinding material water jet steel rail grinding |
| PCT/CN2022/131525 WO2023116255A1 (en) | 2021-12-23 | 2022-11-11 | Target distance adjustable nozzle and method suitable for abrasive water jet rail polishing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111588201.4A CN114393519B (en) | 2021-12-23 | 2021-12-23 | Target distance adjustable nozzle and method suitable for grinding material water jet steel rail grinding |
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| Publication Number | Publication Date |
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| CN114393519A true CN114393519A (en) | 2022-04-26 |
| CN114393519B CN114393519B (en) | 2023-05-12 |
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| CN202111588201.4A Active CN114393519B (en) | 2021-12-23 | 2021-12-23 | Target distance adjustable nozzle and method suitable for grinding material water jet steel rail grinding |
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| Country | Link |
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| CN (1) | CN114393519B (en) |
| WO (1) | WO2023116255A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023116255A1 (en) * | 2021-12-23 | 2023-06-29 | 武汉大学 | Target distance adjustable nozzle and method suitable for abrasive water jet rail polishing |
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| WO2023116255A1 (en) * | 2021-12-23 | 2023-06-29 | 武汉大学 | Target distance adjustable nozzle and method suitable for abrasive water jet rail polishing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114393519B (en) | 2023-05-12 |
| WO2023116255A1 (en) | 2023-06-29 |
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