CA2144196A1 - Ultra high pressure water-jet cutter - Google Patents
Ultra high pressure water-jet cutterInfo
- Publication number
- CA2144196A1 CA2144196A1 CA002144196A CA2144196A CA2144196A1 CA 2144196 A1 CA2144196 A1 CA 2144196A1 CA 002144196 A CA002144196 A CA 002144196A CA 2144196 A CA2144196 A CA 2144196A CA 2144196 A1 CA2144196 A1 CA 2144196A1
- Authority
- CA
- Canada
- Prior art keywords
- abradant
- high pressure
- water
- inlet
- pressure water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- 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
- B24C1/04—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
- B24C1/045—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
- B24C7/0007—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
- B24C7/0015—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F3/00—Severing by means other than cutting; Apparatus therefor
- B26F3/004—Severing by means other than cutting; Apparatus therefor by means of a fluid jet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The ultra high pressure water-jet cutter includes an ultra high pressure pump, an accumulator, an abradant jetter, an abradant-control valve, feeding pipes and valves. Its characteristics are that the side wall of the mixing cavity of the abradant jetter has an abradant inlet and an air-flow intake, and the position of the abradant inlet is higher than that of the nozzle of the high pressure water and the position of air-flow intake is higher than that of the abradant inlet. The high pressure water inlet and outlet of the accumulator are located at the side wall of the accumulator and the air-intake pipe of the abradant-control valve has a air-flow regulating valve. The axes of interfaces of emery-inlet and emery-outlet are designed at the same straight line direction.
Description
2~41~6 j~
-ULTRA HIGH PRESSURE WATER~ET CUTTER
FIELD QF TIIE INV.F.~TION: .. .
This invention relates to cutting machinery and more pa.li~ula.ly to cuning machinery using ultra high pressure water jets to cut materials.
BACKGROUND OF THE INVFNTION:
The working principle of ultrabigh pressure waterjet cutter is that water is pressurized into high pressure of several kg/cm~ by high pressure pump, then is jetted through a tiny hole made of wear-resistant material by means of a special pipingconnection. The jetting speed of water can reach several times sonic speed, and a~ . u.lill~ly can cut materials. Even very strong and rigid materials can be cut when an abradant, such as emery, is mixed into a high speed flow of water. The materials being cut (such as metal plates, stone plates) are not thermally affected as they are by ordinary high UIC cutting, because the present invention involves normal L~ u~ u~ cutting.
BRIEF DESCRIPTI~N QF Tl:~F DBAWIN~S:
Embodiments of the prior art, and of the present invention, are described by wayof example in association with the dl l Ulll~dUyillg drawings in which:
Figure I shows the structure of a prior art American I I-X ultra high pressure water-jrl l ~ I IP, ~
Figure 2 shows the ~ ~ "" " ~ structure of the prior art American 11-X ultra high pressure waterjetting cuner;
Figure 3 shows the abradant jetter structure of the prior art American I 1-X ultra high pressure waterjetting cutter;
Figure 4 shows the abradant-control valve structure of the prior art American I I-X
ultra high pressure wateriening cutter;
Figure 5 shows the structure of ultra high pressure waterjetting cutter of the this invention;
Figure 6 shows the ~ ... structure of this invention;
Figure 7 shows the abradant-control valve structure of this invention, and Figure 8 shows the abradant jetter structure of this invention.
S DESCRIPTION OF TH[E PRIQR ART: _ The present technique similar to this invention is American I 1-X Ultra high pressure waterjet cutter, whose structure is shown as Figure 1. The oil pump (6) is driven by a motor (S) and it outputs the oil flow with pressure of 200 kg/cm2. The secondary booster pump (3) is driven through a pipe (4) with motor of 30 - 60 HP according to required 10 butting pressure and flow. The high pressure water from booster pump (3) (Pressure aroumd 3,800 kg/cm2) is fed into an ~3rcl.m~ trr (2). The pressure stability of output high pressure water is maintained by means of water illuu~ ;bility. The high pressure water from the Rr~llmlllAtrr (2) goes into a high pressure waterjetter (10) through piping (8) and valve (9) to cut a workpiece, which is called clean waterjet cutting. When it is required 15 to cut a more rigid workpiece, an abradant may be mixed into the high pressure water.
With the effect of negative pressure siphonage caused by high speed waterjetting from the jetter, the abradant - preferably emery in the abradant box (13) goes into the jetter (10) through the abradantjetting control valve (12) and the emery-feeding pipe (Il) to form abradant waterjetting for cutting. The abradant water with scraps of the cutting materials 20 flows into a collecting basin after passing through a retrieval port (16). The oil basin with pump (6) and pump (3) are formed into oil-supply circulation. (1) in Figure I is water inlet and (14? is air intake port. It is shown from the above description that the main Y of the cutter are an ultra high pressure pump, an ~,""~ " a jetter, and an abradant jetting-regulating valve. The Americam-made I I-X cutter has the following weak 25 points:
1. The Structure of the ~rrllm~ t~r As shown in Figure 2, the ~ l..llA~ is composed of a water inlet (2a), a water outlet (2b), a cylinder body (2d), a conical sealing nut (2c) and a locking nut (2b). The 30 water outlet and inlet have high p~essure liquid-feeding pipes (8b) and (8a) ~ iv~ly . ~, which cross the sealing nut (sc) and locking nut (2b). The liquid-feeding pipes (8b) and (8a) are horizontally positioned along the axis of the a- ..,.,..,1.1~., Therefore, when the .,. is horizontally placed and its position of liquid surface is higher than that of the water inlet and outlet, the air in the upper part of ~rrlmn~ r cannot be drained and 5 the residual air space exists without a draining channel. Pressure fluctuation cannot be avoided and the jetting pressure in the jetter is neither hl~nno~n~ollc nor stable when the system is working. The inside of the conical sealing nut (2c) will receive more pressure owing to its plate structure, thus, the screw thread between sealing nut (2c) and cylinder body (2d) will receive more shear stress. Accordingly, the pressure of waterjetting is 10 reduced and pressure stability is effected due to ineffective sealing. (2e) in Figure 2 is ultra high pressure water in the ~rcllnn~ tf~r.
2. Abradant Jetter The ultra high pressure water (lOa) is jetted by the high pressure water inlet nozzle.
15 The abradant flow (lOe) comes into the mixing cavity (lOc) in lateral direction owing to negative pressure siphonage effect during jetting. The high speed water jetting with abradant is formed and is jetted from an outlet nozzle (lOf) to cut a workpiece as shown in Figure 3. The water-emery mixing method by single-side insertion is adopted for the jetter. Severe wearing of a single-side will happen to the nozzle owing to i,.l,",.,~ y 20 of water-emery mixing and unstable jetting pressure. (lOd) in Figure 3 is the shell of the jetter.
-ULTRA HIGH PRESSURE WATER~ET CUTTER
FIELD QF TIIE INV.F.~TION: .. .
This invention relates to cutting machinery and more pa.li~ula.ly to cuning machinery using ultra high pressure water jets to cut materials.
BACKGROUND OF THE INVFNTION:
The working principle of ultrabigh pressure waterjet cutter is that water is pressurized into high pressure of several kg/cm~ by high pressure pump, then is jetted through a tiny hole made of wear-resistant material by means of a special pipingconnection. The jetting speed of water can reach several times sonic speed, and a~ . u.lill~ly can cut materials. Even very strong and rigid materials can be cut when an abradant, such as emery, is mixed into a high speed flow of water. The materials being cut (such as metal plates, stone plates) are not thermally affected as they are by ordinary high UIC cutting, because the present invention involves normal L~ u~ u~ cutting.
BRIEF DESCRIPTI~N QF Tl:~F DBAWIN~S:
Embodiments of the prior art, and of the present invention, are described by wayof example in association with the dl l Ulll~dUyillg drawings in which:
Figure I shows the structure of a prior art American I I-X ultra high pressure water-jrl l ~ I IP, ~
Figure 2 shows the ~ ~ "" " ~ structure of the prior art American 11-X ultra high pressure waterjetting cuner;
Figure 3 shows the abradant jetter structure of the prior art American I 1-X ultra high pressure waterjetting cutter;
Figure 4 shows the abradant-control valve structure of the prior art American I I-X
ultra high pressure wateriening cutter;
Figure 5 shows the structure of ultra high pressure waterjetting cutter of the this invention;
Figure 6 shows the ~ ... structure of this invention;
Figure 7 shows the abradant-control valve structure of this invention, and Figure 8 shows the abradant jetter structure of this invention.
S DESCRIPTION OF TH[E PRIQR ART: _ The present technique similar to this invention is American I 1-X Ultra high pressure waterjet cutter, whose structure is shown as Figure 1. The oil pump (6) is driven by a motor (S) and it outputs the oil flow with pressure of 200 kg/cm2. The secondary booster pump (3) is driven through a pipe (4) with motor of 30 - 60 HP according to required 10 butting pressure and flow. The high pressure water from booster pump (3) (Pressure aroumd 3,800 kg/cm2) is fed into an ~3rcl.m~ trr (2). The pressure stability of output high pressure water is maintained by means of water illuu~ ;bility. The high pressure water from the Rr~llmlllAtrr (2) goes into a high pressure waterjetter (10) through piping (8) and valve (9) to cut a workpiece, which is called clean waterjet cutting. When it is required 15 to cut a more rigid workpiece, an abradant may be mixed into the high pressure water.
With the effect of negative pressure siphonage caused by high speed waterjetting from the jetter, the abradant - preferably emery in the abradant box (13) goes into the jetter (10) through the abradantjetting control valve (12) and the emery-feeding pipe (Il) to form abradant waterjetting for cutting. The abradant water with scraps of the cutting materials 20 flows into a collecting basin after passing through a retrieval port (16). The oil basin with pump (6) and pump (3) are formed into oil-supply circulation. (1) in Figure I is water inlet and (14? is air intake port. It is shown from the above description that the main Y of the cutter are an ultra high pressure pump, an ~,""~ " a jetter, and an abradant jetting-regulating valve. The Americam-made I I-X cutter has the following weak 25 points:
1. The Structure of the ~rrllm~ t~r As shown in Figure 2, the ~ l..llA~ is composed of a water inlet (2a), a water outlet (2b), a cylinder body (2d), a conical sealing nut (2c) and a locking nut (2b). The 30 water outlet and inlet have high p~essure liquid-feeding pipes (8b) and (8a) ~ iv~ly . ~, which cross the sealing nut (sc) and locking nut (2b). The liquid-feeding pipes (8b) and (8a) are horizontally positioned along the axis of the a- ..,.,..,1.1~., Therefore, when the .,. is horizontally placed and its position of liquid surface is higher than that of the water inlet and outlet, the air in the upper part of ~rrlmn~ r cannot be drained and 5 the residual air space exists without a draining channel. Pressure fluctuation cannot be avoided and the jetting pressure in the jetter is neither hl~nno~n~ollc nor stable when the system is working. The inside of the conical sealing nut (2c) will receive more pressure owing to its plate structure, thus, the screw thread between sealing nut (2c) and cylinder body (2d) will receive more shear stress. Accordingly, the pressure of waterjetting is 10 reduced and pressure stability is effected due to ineffective sealing. (2e) in Figure 2 is ultra high pressure water in the ~rcllnn~ tf~r.
2. Abradant Jetter The ultra high pressure water (lOa) is jetted by the high pressure water inlet nozzle.
15 The abradant flow (lOe) comes into the mixing cavity (lOc) in lateral direction owing to negative pressure siphonage effect during jetting. The high speed water jetting with abradant is formed and is jetted from an outlet nozzle (lOf) to cut a workpiece as shown in Figure 3. The water-emery mixing method by single-side insertion is adopted for the jetter. Severe wearing of a single-side will happen to the nozzle owing to i,.l,",.,~ y 20 of water-emery mixing and unstable jetting pressure. (lOd) in Figure 3 is the shell of the jetter.
3. Abradant-Control Valve As shown in Figure 4, (12d) is the abradant inlet and the conical regulating block 25 (12f) moves up and down through the pushing of a regulating rod (12j). The size of ring space around conical hole will change accu~ ly during movement up and down of the regulating block (12f) to control the flow. With the effect of negative pressure siphonage force caused by powerful high speed jetting water as well as the pushing force of airflow (12h), the abradant reaches the jetter by way of an emery outlet (12k) and an emery-passing 30 tube (see Figure 1), then is accelerated by high pressure water and jetted by an abradant 21~196 inlet nozzle to cut a workpiece. The main weak points of the abradant-control valve lies in vertical angle crossing between the directions of inlet (12d) and outlet (12k) of abradant.
Accordingly, the resistance of emery flow is increased. Secondly, the emery outlet (12k) will be easily blocked without the device to regulate air-flow at the air-flow inlet (12h).
5 The homogeneity and stability of jetting will be effected when the velocity of emery flow is not regulated.
SUMMARY O~ T~. TNyENTloN:
In accordance with the present invention, there is provided a new ultra high pressure 10 waterjetting cutter with h~mogenmlc and stable high pressure jetting.
The present invention consistS of an ultra high pressure waterjet cutter comprising an ultra high pressure pump connected in driven relation to a motor and operatively connected to a source of water through a water-feeding pipe, valve means operatively comnected to the ultra high pressure pump, an ~..""~ .. made up of a cylinder body, a 15 water inlet comnected in sealed relation to the cylinder body, and a water outlet comlected in sealed relation to the cylinder body. The water inlet is operatively connected to the valve means. An abradant box for storing abradant therein is provided, together with an abradant-control valve comprising an upper support having an abradant inlet. The abradant inlet is operatively connected to the abradant box, a lower body having an abradant outlet 20 and a cross-extension head, an air-intake pipe, an air-flow regulating valve, and a manual adjustment means. The upper body is movable with respect to the lower body by means of m~nirl~ tif~n of the manual adjustment means; and the cross extension head is movable with the lower body with respect to the upper body so as to control the flow of abradant through the control valve. Finally, there is an abradant jetter comprising a water interface 25 connected to the ~c-Tmlll:lt~lr a water jetter operatively connected to the water interface, a high pressure water nozzle operatively connected to the water jetter, a mixing cavity, an abradant inlet comnected to the abradant control valve, an air-flow intake opening into the mixing cavity, a mixing cavity outlet, and an abradant water outlet nozzle.
The following is the description of the technical scheme of the invention. Its . ~ 21~4196 structure is shown in Figure 5. It includes an ultra high pressure pump (22), anmll~rt~r (27), an abradant box (30), an abradant-control valve (31), an abradant jetter (29), feeding pipes (for water, emery) and valves (for water, emery). The connection of the above said . ..",l,.",~.,l~ is as fo~lows:
S The ultra high pressure pump (22) is connected with a motor and a source of water such as a water tank (23) through a water-feeding pipe respectively (only water tank (23) shown in Figure 5). The water outlet of pump is connected with the water inlet of ~cllm~ t~lr through valve (21), distributor (20), valve (18) and load valve (17) in the pipe of high pressure water. The water outlet of the ~rcllm-.lAtr~r (26) is ~inked with high pressure water nozzle of abradant jetter (29) by way of high pressure water-feeding pipe.
The abradant box (30), for storing abradant therein, is commected with abradant inlet of abradant jetter through emery-feeding pipe and abradant-control valve (31). (32) is the workpiece for cutting.
It can be seen from the above that the arrangements and connection of the main parts of the invention are similar to the present technology. The technical modification of the invention lies in the i~ UY~ L of jetting effect of abradant jetter, which is the key link of the invention. The realization of the invention depends on the homogeneous and stable high speed jetting flow. The jetting effect of abradant jetter mair~ly lies on three factors:
1. The structure of jetter itself;
2. The condition of object-feeding of jetter, 3. The mixing and operating state of objects in the jetter.
The following is the further ~xrl~n~ltion of technical scheme of this invention.
1. The M Klifir~ti~n of ~(-rllmllls3t~lr Structure The ~."""1,,1-~- is required to be filled without residual air space. Otherwise, the high pressure water in the abradant jetter will be fluctuated and the stability of jetting flow 30 from the abradant jetter be effected. The ~f~rllm~ tor of the invention consists of a 2~4419~
cylinder body, sealing covers at both ends of cy~inder body, and an inlet and outlet of high pressure water. Its property is that the said inlet and outlet of high pressure are located at the cylinder of s~rCIlm~ r. The said inside of sealing ends is of the spherical surface with the sealing rings between the spherical head and inside cavity of ~rCIImlll~t r.
2. The M~1ifi/ ~inn of Abradant-Control Valve The p~,lr~ of abradant-control valve will effect abradant hrmrg(-nPity and stability in the abradant jetter, which further effects the stability of jetting flow from the abradant jetter. The abradant-control valve of this invention includes an emery inlet with 10 conical inside, a valve, an emery outlet, a conical block regulating device and an air intake pipe. The former three parts are cormected successively with the regulating device in the valve and air intake pipe at the side wall of valve. It is ~ a~ d by the said air intake pipe with air-regulating valve. Secondly, the axes of emery inlet and outlet are designed in the same straight line direction.
3. The M \~1ifir~tl~n of Abradant Jetter The abradant jetter is composed of a high pressure water inlet nozzle, a mixing cavity, an abradant inlet, an abradant water outlet nozzle, with the high pressure water inlet nozzle and the abradant water outlet nozzle connecting with the inlet and outlet of the 20 mixing cavity respectively. The abradant inlet is disposed at the side wall of mixing cavity with its vertical position hi?o,her than the opening of high pressure water inlet nozzle. Its property is that the said mixing cavity of the jetter has airflow intake opening with its position at the side wall of mixing cavity and at the upper part of the abradant inlet as well.
The inside of side wall in mixing cavity is designed into the shape of quasi-paraboloid and 25 the air intake pipe for airflow feeding has air-flow regulating valve.
The downward siphonage force caused by negative pressure of high pressure water jetting is exerted into the abradant from the abradant inlet on one hand, the abradant is effected by the downward spiral airflow formed by airflow from its intake opening in the mixing cavity on the other hand and the jetted abradant in the mixing cavity is formed into 30 downward abradant spiral flow because the air-flow intake opening is designed at the upper 21~4196 part of abradant inlet at the side wall of mixing cavity, the inside of side wall of mixing cavity is of quasi-paraboloid shape and the vertical position of opening of high pressure inlet nozzle is longer than the abradant inlet. When having reached the lower part of jetter, the abradant is attracted into jetting water by negative pressure of high pressure water under 5 the Venturi effect. Thus, the jetter can hnm(lg~n~ollely transfer emery of jetting flow into abradant particles which can be homogenously and stably accelerated to a very high speed (several times of sonic speed) for cutting a workpiece.
The resistance of emery flow is decreased and the abradant flow in the abradant jetter can be hom~-~Pn~ollcly regulated into an optimum value due to air-flow regulating 10 valve at air intake pipe of abradant-control valve and its axes of inlet and outlet of emery at the same straight line direction. The water-inlet and outlet of ~llml~ f~r designed at its cylinder body can eliminate residual air space in the f~ "~ , thus making the pressure of high pressure water stable. The fine sealing and hnmt-gi~nf-ous and stable water pressure are realized by the spherical design of sealing covers at both ends with sealing 15 rings.
The above said technical modification is mainly e~ rI ;~ by airflow intake opening into the mixing cavity of the jetter. Under this condition the homogeny and stability of high pressure jetting flow can be improved obviously even if the ~
and abradant-control valve with different structure are adopted. However, the better effect 20 will be achieved if the ~ and abradant-control valve of the invention is used.
DETAILED I~ESCRIPTION OF THEI Pl~F~FERRED FMI~ODIMENTS:
The practical examples of this invention are given as follows:
It may be seen from Figure 6 that the inlet (27b) and outlet (27b) of high pressure ~5 water are located at the cylinder body (27c) of; . ~.,.1l.l1~l.ll which can be designed either at the upper part of side wall or at both upper and lower directions ~ ,Liv~ly. The sealing ring of l'O"-type is used between spherical head and the inside of ~, ~ . " 1, l ll. .~ l. with blastin-resistant washers to ensure inside sealing. The alloy-steel with maximum tensile strength ~b2100 l~glrnml and elongation S215% such as 38 Cf MOA 1, 33 CrNi3mo, 35 30 CrMrMo are chosen with preference to 35 CrMrMo. 40 Cr is used for spiral joint.
2~ 6 The ab}adant jetter is shown in Figure 8 with high pressure water interface (29a), high pressure water jetter (29b) with nozzle (291) at its lower end, clamping nut (29c), airflow intake opening and its regulating valve (29d) abradant-feeding pipe (29c), mixing cavity (29f), abradant jetting-tube base (29g), fixed nut base (29h), abradant nozzle (29i), S corlical spring clamp (29j), inserted part (29k), fixed nut (29m), fixed plate (29n). The high pressure water jetter (29b) has inside nozzle (291) whose vertical opening position is located at the lower part of abradant inlet (29e). The abradant inlet (29e) is located at the side wall of mixing cavity (29f) and the airflow intake opening (29d) is also located at the side wall of mixing cavity (29f) and at the upper part of abradant inlet (29e). The relevant positions of other r."~ are shown in Figure 8.
The steel 40 Cr may be used for mixing cavity of jetter. The strength and surface rigidity of abradant jetting-tube base should be larger than those of mixing cavity with rigidity Hrc=60~62. The rigid alloy Bk3 can be used for abradant nozzle with rigidity Hrc=81~83.
The structure of the abradant-control valve will now be discussed with reference to Figure 7. The abradant-control valve comprises a manual adjustment means in the form of a manual turning wheel (31a), spiral rod (31b) lower emery-feeding tube (31c), regulating nut (31d), pulling rod (31e), upper support (31f), upper emery-feeding tube (31g), plastic upper emery-feeding tube (31h), emery inlet (31i), cross extension head at conical end (3 lj), "O"-type sealing ring (3 lk), airflow regulating spiral block at conical end (31j), limit cylinder pin (31m), lower support (31rl), fixed screw (310), plastic ~ower emery-feeding tube (31p). The upper support (3 If) with emery outlet of conical inside is used as valve body together with regulating nut (31d) in which the regulating nut (31d) has emery outlet with conical inside. The manual turning wheel (31a) is connected successively with spiral rod (31b), regulating nut (31d) and cross extension head at conical end. The spiral rod (31b) and nut (31d) are turning successively when the wheel (31a) is running, thus making cross extension head (31j) moving up and down. The size of ring-type joint between conical end and conical inside of upper support will change d~ dill~ly to control emery quantity. The pressure condition in valve body is changed by turning of airflow regulating valve (311) and varying of its airflow quantity. Then, the emery quantity will 2~ 6 be changed ac-,u~ y~ The alloy-steel 40 Cr may be used for cross extension head with annealed rigidity Hrc=45-48.
In Figure 5, the ultra high pressure pump (22) is a l~c;~lU~a~i~lg one instead of twice-boosting pump with hydraulic driving. Take 3 WCB-4 (9134 A) pump as example, S the wheel is driYen by motor to directly turn booster pump with maximum pressure (water media) of 4,000 kg/cm2 and flow quantity of 2 Itr/min.
The following is the test data of cutting different materials by the invented cutter:
10Materials Thickness Nozzle Pressure Cutting Section Diameter Speed quality (MM) (MM) kg./cm2 MM/min.
Quartz 50 1.2(Emery 2200 120 Excellent Glass Nozzle) 65Mn Alloy 12 1.2(Emery 2200 50 Excellent Steel Plate Nozzle) 15Marble 20 1.2(Emery 2200 1000 Excellent Nûzzle) Rubber 20 0.2(Water 3400 6000 Excellent Nozzle Asbestos 6 0.2(Water 3400 12000 Excellent Plate Nozzle) Other mn~1ifir~tinn~ and alterations may be used in the design and ".~.",r,...~."t; of the apparatus of the present invention without departing from the spirit and scope of the auuu~ uallyillg claims.
Accordingly, the resistance of emery flow is increased. Secondly, the emery outlet (12k) will be easily blocked without the device to regulate air-flow at the air-flow inlet (12h).
5 The homogeneity and stability of jetting will be effected when the velocity of emery flow is not regulated.
SUMMARY O~ T~. TNyENTloN:
In accordance with the present invention, there is provided a new ultra high pressure 10 waterjetting cutter with h~mogenmlc and stable high pressure jetting.
The present invention consistS of an ultra high pressure waterjet cutter comprising an ultra high pressure pump connected in driven relation to a motor and operatively connected to a source of water through a water-feeding pipe, valve means operatively comnected to the ultra high pressure pump, an ~..""~ .. made up of a cylinder body, a 15 water inlet comnected in sealed relation to the cylinder body, and a water outlet comlected in sealed relation to the cylinder body. The water inlet is operatively connected to the valve means. An abradant box for storing abradant therein is provided, together with an abradant-control valve comprising an upper support having an abradant inlet. The abradant inlet is operatively connected to the abradant box, a lower body having an abradant outlet 20 and a cross-extension head, an air-intake pipe, an air-flow regulating valve, and a manual adjustment means. The upper body is movable with respect to the lower body by means of m~nirl~ tif~n of the manual adjustment means; and the cross extension head is movable with the lower body with respect to the upper body so as to control the flow of abradant through the control valve. Finally, there is an abradant jetter comprising a water interface 25 connected to the ~c-Tmlll:lt~lr a water jetter operatively connected to the water interface, a high pressure water nozzle operatively connected to the water jetter, a mixing cavity, an abradant inlet comnected to the abradant control valve, an air-flow intake opening into the mixing cavity, a mixing cavity outlet, and an abradant water outlet nozzle.
The following is the description of the technical scheme of the invention. Its . ~ 21~4196 structure is shown in Figure 5. It includes an ultra high pressure pump (22), anmll~rt~r (27), an abradant box (30), an abradant-control valve (31), an abradant jetter (29), feeding pipes (for water, emery) and valves (for water, emery). The connection of the above said . ..",l,.",~.,l~ is as fo~lows:
S The ultra high pressure pump (22) is connected with a motor and a source of water such as a water tank (23) through a water-feeding pipe respectively (only water tank (23) shown in Figure 5). The water outlet of pump is connected with the water inlet of ~cllm~ t~lr through valve (21), distributor (20), valve (18) and load valve (17) in the pipe of high pressure water. The water outlet of the ~rcllm-.lAtr~r (26) is ~inked with high pressure water nozzle of abradant jetter (29) by way of high pressure water-feeding pipe.
The abradant box (30), for storing abradant therein, is commected with abradant inlet of abradant jetter through emery-feeding pipe and abradant-control valve (31). (32) is the workpiece for cutting.
It can be seen from the above that the arrangements and connection of the main parts of the invention are similar to the present technology. The technical modification of the invention lies in the i~ UY~ L of jetting effect of abradant jetter, which is the key link of the invention. The realization of the invention depends on the homogeneous and stable high speed jetting flow. The jetting effect of abradant jetter mair~ly lies on three factors:
1. The structure of jetter itself;
2. The condition of object-feeding of jetter, 3. The mixing and operating state of objects in the jetter.
The following is the further ~xrl~n~ltion of technical scheme of this invention.
1. The M Klifir~ti~n of ~(-rllmllls3t~lr Structure The ~."""1,,1-~- is required to be filled without residual air space. Otherwise, the high pressure water in the abradant jetter will be fluctuated and the stability of jetting flow 30 from the abradant jetter be effected. The ~f~rllm~ tor of the invention consists of a 2~4419~
cylinder body, sealing covers at both ends of cy~inder body, and an inlet and outlet of high pressure water. Its property is that the said inlet and outlet of high pressure are located at the cylinder of s~rCIlm~ r. The said inside of sealing ends is of the spherical surface with the sealing rings between the spherical head and inside cavity of ~rCIImlll~t r.
2. The M~1ifi/ ~inn of Abradant-Control Valve The p~,lr~ of abradant-control valve will effect abradant hrmrg(-nPity and stability in the abradant jetter, which further effects the stability of jetting flow from the abradant jetter. The abradant-control valve of this invention includes an emery inlet with 10 conical inside, a valve, an emery outlet, a conical block regulating device and an air intake pipe. The former three parts are cormected successively with the regulating device in the valve and air intake pipe at the side wall of valve. It is ~ a~ d by the said air intake pipe with air-regulating valve. Secondly, the axes of emery inlet and outlet are designed in the same straight line direction.
3. The M \~1ifir~tl~n of Abradant Jetter The abradant jetter is composed of a high pressure water inlet nozzle, a mixing cavity, an abradant inlet, an abradant water outlet nozzle, with the high pressure water inlet nozzle and the abradant water outlet nozzle connecting with the inlet and outlet of the 20 mixing cavity respectively. The abradant inlet is disposed at the side wall of mixing cavity with its vertical position hi?o,her than the opening of high pressure water inlet nozzle. Its property is that the said mixing cavity of the jetter has airflow intake opening with its position at the side wall of mixing cavity and at the upper part of the abradant inlet as well.
The inside of side wall in mixing cavity is designed into the shape of quasi-paraboloid and 25 the air intake pipe for airflow feeding has air-flow regulating valve.
The downward siphonage force caused by negative pressure of high pressure water jetting is exerted into the abradant from the abradant inlet on one hand, the abradant is effected by the downward spiral airflow formed by airflow from its intake opening in the mixing cavity on the other hand and the jetted abradant in the mixing cavity is formed into 30 downward abradant spiral flow because the air-flow intake opening is designed at the upper 21~4196 part of abradant inlet at the side wall of mixing cavity, the inside of side wall of mixing cavity is of quasi-paraboloid shape and the vertical position of opening of high pressure inlet nozzle is longer than the abradant inlet. When having reached the lower part of jetter, the abradant is attracted into jetting water by negative pressure of high pressure water under 5 the Venturi effect. Thus, the jetter can hnm(lg~n~ollely transfer emery of jetting flow into abradant particles which can be homogenously and stably accelerated to a very high speed (several times of sonic speed) for cutting a workpiece.
The resistance of emery flow is decreased and the abradant flow in the abradant jetter can be hom~-~Pn~ollcly regulated into an optimum value due to air-flow regulating 10 valve at air intake pipe of abradant-control valve and its axes of inlet and outlet of emery at the same straight line direction. The water-inlet and outlet of ~llml~ f~r designed at its cylinder body can eliminate residual air space in the f~ "~ , thus making the pressure of high pressure water stable. The fine sealing and hnmt-gi~nf-ous and stable water pressure are realized by the spherical design of sealing covers at both ends with sealing 15 rings.
The above said technical modification is mainly e~ rI ;~ by airflow intake opening into the mixing cavity of the jetter. Under this condition the homogeny and stability of high pressure jetting flow can be improved obviously even if the ~
and abradant-control valve with different structure are adopted. However, the better effect 20 will be achieved if the ~ and abradant-control valve of the invention is used.
DETAILED I~ESCRIPTION OF THEI Pl~F~FERRED FMI~ODIMENTS:
The practical examples of this invention are given as follows:
It may be seen from Figure 6 that the inlet (27b) and outlet (27b) of high pressure ~5 water are located at the cylinder body (27c) of; . ~.,.1l.l1~l.ll which can be designed either at the upper part of side wall or at both upper and lower directions ~ ,Liv~ly. The sealing ring of l'O"-type is used between spherical head and the inside of ~, ~ . " 1, l ll. .~ l. with blastin-resistant washers to ensure inside sealing. The alloy-steel with maximum tensile strength ~b2100 l~glrnml and elongation S215% such as 38 Cf MOA 1, 33 CrNi3mo, 35 30 CrMrMo are chosen with preference to 35 CrMrMo. 40 Cr is used for spiral joint.
2~ 6 The ab}adant jetter is shown in Figure 8 with high pressure water interface (29a), high pressure water jetter (29b) with nozzle (291) at its lower end, clamping nut (29c), airflow intake opening and its regulating valve (29d) abradant-feeding pipe (29c), mixing cavity (29f), abradant jetting-tube base (29g), fixed nut base (29h), abradant nozzle (29i), S corlical spring clamp (29j), inserted part (29k), fixed nut (29m), fixed plate (29n). The high pressure water jetter (29b) has inside nozzle (291) whose vertical opening position is located at the lower part of abradant inlet (29e). The abradant inlet (29e) is located at the side wall of mixing cavity (29f) and the airflow intake opening (29d) is also located at the side wall of mixing cavity (29f) and at the upper part of abradant inlet (29e). The relevant positions of other r."~ are shown in Figure 8.
The steel 40 Cr may be used for mixing cavity of jetter. The strength and surface rigidity of abradant jetting-tube base should be larger than those of mixing cavity with rigidity Hrc=60~62. The rigid alloy Bk3 can be used for abradant nozzle with rigidity Hrc=81~83.
The structure of the abradant-control valve will now be discussed with reference to Figure 7. The abradant-control valve comprises a manual adjustment means in the form of a manual turning wheel (31a), spiral rod (31b) lower emery-feeding tube (31c), regulating nut (31d), pulling rod (31e), upper support (31f), upper emery-feeding tube (31g), plastic upper emery-feeding tube (31h), emery inlet (31i), cross extension head at conical end (3 lj), "O"-type sealing ring (3 lk), airflow regulating spiral block at conical end (31j), limit cylinder pin (31m), lower support (31rl), fixed screw (310), plastic ~ower emery-feeding tube (31p). The upper support (3 If) with emery outlet of conical inside is used as valve body together with regulating nut (31d) in which the regulating nut (31d) has emery outlet with conical inside. The manual turning wheel (31a) is connected successively with spiral rod (31b), regulating nut (31d) and cross extension head at conical end. The spiral rod (31b) and nut (31d) are turning successively when the wheel (31a) is running, thus making cross extension head (31j) moving up and down. The size of ring-type joint between conical end and conical inside of upper support will change d~ dill~ly to control emery quantity. The pressure condition in valve body is changed by turning of airflow regulating valve (311) and varying of its airflow quantity. Then, the emery quantity will 2~ 6 be changed ac-,u~ y~ The alloy-steel 40 Cr may be used for cross extension head with annealed rigidity Hrc=45-48.
In Figure 5, the ultra high pressure pump (22) is a l~c;~lU~a~i~lg one instead of twice-boosting pump with hydraulic driving. Take 3 WCB-4 (9134 A) pump as example, S the wheel is driYen by motor to directly turn booster pump with maximum pressure (water media) of 4,000 kg/cm2 and flow quantity of 2 Itr/min.
The following is the test data of cutting different materials by the invented cutter:
10Materials Thickness Nozzle Pressure Cutting Section Diameter Speed quality (MM) (MM) kg./cm2 MM/min.
Quartz 50 1.2(Emery 2200 120 Excellent Glass Nozzle) 65Mn Alloy 12 1.2(Emery 2200 50 Excellent Steel Plate Nozzle) 15Marble 20 1.2(Emery 2200 1000 Excellent Nûzzle) Rubber 20 0.2(Water 3400 6000 Excellent Nozzle Asbestos 6 0.2(Water 3400 12000 Excellent Plate Nozzle) Other mn~1ifir~tinn~ and alterations may be used in the design and ".~.",r,...~."t; of the apparatus of the present invention without departing from the spirit and scope of the auuu~ uallyillg claims.
Claims (12)
1. An ultra high pressure water-jet cutter comprising:
an ultra high pressure pump connected in driven relation to a motor and operatively connected to a source of water through a water-feeding pipe;
valve means operatively connected to said ultra high pressure pump;
an accumulator made up of a cylinder body, a water inlet connected in sealed relation to said cylinder body, and a water outlet connected in sealed relation to said cylinder body, with said water inlet being operatively connected to said valve means;
an abradant box for storing abradant therein;
an abradant-control valve comprising an upper support having an abradant inlet with said abradant inlet being operatively connected to said abradant box, a lower body having an abradant outlet and a cross-extension head, an air-intake pipe, an air-flow regulating valve, and a manual adjustment means, wherein said upper body is movable with respect to said lower body by means of manipulation of said manual adjustment means, and said cross extension head is movable with said lower body with respect to said upper body so as to control the flow of abradant through said control valve; and an abradant jetter comprising a water interface connected to said accumulator, awater jetter operatively connected to said water interface, a high pressure water nozzle operatively connected to said water jetter, a mixing cavity, an abradant inlet connected to said abradant control valve, an air-flow intake opening into said mixing cavity, a mixing cavity outlet, and an abradant water outlet nozzle.
an ultra high pressure pump connected in driven relation to a motor and operatively connected to a source of water through a water-feeding pipe;
valve means operatively connected to said ultra high pressure pump;
an accumulator made up of a cylinder body, a water inlet connected in sealed relation to said cylinder body, and a water outlet connected in sealed relation to said cylinder body, with said water inlet being operatively connected to said valve means;
an abradant box for storing abradant therein;
an abradant-control valve comprising an upper support having an abradant inlet with said abradant inlet being operatively connected to said abradant box, a lower body having an abradant outlet and a cross-extension head, an air-intake pipe, an air-flow regulating valve, and a manual adjustment means, wherein said upper body is movable with respect to said lower body by means of manipulation of said manual adjustment means, and said cross extension head is movable with said lower body with respect to said upper body so as to control the flow of abradant through said control valve; and an abradant jetter comprising a water interface connected to said accumulator, awater jetter operatively connected to said water interface, a high pressure water nozzle operatively connected to said water jetter, a mixing cavity, an abradant inlet connected to said abradant control valve, an air-flow intake opening into said mixing cavity, a mixing cavity outlet, and an abradant water outlet nozzle.
2. The ultra high pressure water-jet cutter of claim 1, wherein said inside of the side wall of said mixing cavity of said jetter is in the shape of a quasi-paraboloid.
3. The ultra high pressure water-jet cutter of claim 1, wherein said air-flow intake is located in the side wall of said mixing cavity.
4. The ultra high pressure water-jet cutter of claim 1, wherein said air-flow intake is located at the upper part of said abradant inlet.
5. The ultra high pressure water-jet cutter of claim 1, wherein said intake pipeof said abradant-control valve has an air-flow regulating valve.
6. The ultra high pressure water-jet cutter of claim 1, wherein in said abradant-control valve, the axes of said abradant inlet and said abradant outlet are designed in the same straight line direction.
7. The ultra high pressure water-jet cutter of claim 1, wherein said water inletand said outlet of said accumulator are located at the cylinder body of said accumulator.
8. The ultra high pressure water-jet cutter of claim 1, wherein the inside of sealing ends of said accumulator is of the spherical surface with the sealing rings between the spherical head in inside cavity of accumulator.
9. The ultra high pressure water-jet cutter of claim 1, wherein the vertical position of said abradant inlet is higher than the high pressure water nozzle.
10. An ultra high pressure water-jet cutter comprising:
an ultra high pressure pump, an accumulator, an abradant box, an abradant-control valve, an abradant jetter, feeding pipes and valves;
wherein said abradant jetter is composed of high pressure water nozzle, a mixingcavity, an abradant inlet, and an abradant water outlet nozzle, wherein the high pressure water nozzle and the abradant water outlet nozzle are connected with the inlet and outlet of the mixing cavity respectively, the abradant inlet is located at the side wall of mixing cavity and its vertical position is higher than the high pressure water nozzle;
wherein said accumulator is made up of the one cylinder and the sealing covers of its two ends, inlet and outlet of high pressure water, and the water outlet of the accumulator
an ultra high pressure pump, an accumulator, an abradant box, an abradant-control valve, an abradant jetter, feeding pipes and valves;
wherein said abradant jetter is composed of high pressure water nozzle, a mixingcavity, an abradant inlet, and an abradant water outlet nozzle, wherein the high pressure water nozzle and the abradant water outlet nozzle are connected with the inlet and outlet of the mixing cavity respectively, the abradant inlet is located at the side wall of mixing cavity and its vertical position is higher than the high pressure water nozzle;
wherein said accumulator is made up of the one cylinder and the sealing covers of its two ends, inlet and outlet of high pressure water, and the water outlet of the accumulator
11 is connected with the high pressure water pipe and valve, the water outlet of accumulator is connected with the high pressure water-feeding nozzle of the abradant jetter by means of high pressure water pipe;
wherein said abradant-control valve consists of emery-inlet with conical cavity, a valve, an emery-outlet, regulating devices and an air-intake pipe;
wherein the former three parts are connected successively and the air-intake pipe is located at the side wall of the valve;
wherein said ultra high pressure pump connected to a motor and connected to a water-feeding pipe;
wherein the water outlet of said high pressure pump is linked with the accumulator by high pressure water pipe and valve, and the water outlet of accumulator is connected with the high pressure water-feeding nozzle of abradant jetter by means of high pressure water pipe;
wherein said abradant box is connected with the abradant inlet of the abradant jetter through emery inlet pipe and abradant-control valve; and wherein this invention is characterized by the air-flow intake in the mixing cavity of jetter.
wherein said abradant-control valve consists of emery-inlet with conical cavity, a valve, an emery-outlet, regulating devices and an air-intake pipe;
wherein the former three parts are connected successively and the air-intake pipe is located at the side wall of the valve;
wherein said ultra high pressure pump connected to a motor and connected to a water-feeding pipe;
wherein the water outlet of said high pressure pump is linked with the accumulator by high pressure water pipe and valve, and the water outlet of accumulator is connected with the high pressure water-feeding nozzle of abradant jetter by means of high pressure water pipe;
wherein said abradant box is connected with the abradant inlet of the abradant jetter through emery inlet pipe and abradant-control valve; and wherein this invention is characterized by the air-flow intake in the mixing cavity of jetter.
12
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002144196A CA2144196A1 (en) | 1995-03-08 | 1995-03-08 | Ultra high pressure water-jet cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002144196A CA2144196A1 (en) | 1995-03-08 | 1995-03-08 | Ultra high pressure water-jet cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2144196A1 true CA2144196A1 (en) | 1996-09-09 |
Family
ID=4155384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002144196A Abandoned CA2144196A1 (en) | 1995-03-08 | 1995-03-08 | Ultra high pressure water-jet cutter |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2144196A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2268922B1 (en) | 2008-03-26 | 2019-02-20 | Quantum Servo Pumping Technologies Pty Ltd | Ultra high pressure pump with an alternating rotation to linear displacement drive mechanism |
| CN114482895A (en) * | 2022-01-14 | 2022-05-13 | 中国石油大学(华东) | Ultrahigh-pressure abrasive jet cutting system and method for abandoned shaft of offshore oil production platform |
| CN117067115A (en) * | 2023-10-12 | 2023-11-17 | 南安市奥力石业有限公司 | High-hardness marble water cutting equipment |
-
1995
- 1995-03-08 CA CA002144196A patent/CA2144196A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2268922B1 (en) | 2008-03-26 | 2019-02-20 | Quantum Servo Pumping Technologies Pty Ltd | Ultra high pressure pump with an alternating rotation to linear displacement drive mechanism |
| CN114482895A (en) * | 2022-01-14 | 2022-05-13 | 中国石油大学(华东) | Ultrahigh-pressure abrasive jet cutting system and method for abandoned shaft of offshore oil production platform |
| CN117067115A (en) * | 2023-10-12 | 2023-11-17 | 南安市奥力石业有限公司 | High-hardness marble water cutting equipment |
| CN117067115B (en) * | 2023-10-12 | 2023-12-15 | 南安市奥力石业有限公司 | High-hardness marble water cutting equipment |
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| EEER | Examination request | ||
| FZDE | Discontinued |