JPH04102776U - Fluid jet device nozzle assembly - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the durability of the orifice element 3 as a whole without forming the entire orifice element 3 from a superhard material, and to readjust the orifice element 3 even if it becomes misaligned. To enable core work and to reduce running costs by reducing the number of replacement parts. [Structure] The orifice element 3 has a two-piece structure consisting of a spherical body 32 having an orifice 32a and a cylindrical stabilizer body 33. The stabilizer body 33 is made of a superhard material, and the stabilizer body 33 is coupled to the spherical body 32. A connecting portion 34 is provided to connect the stabilizer body,
Something that increases the durability of the orifice element.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a nozzle for a fluid jet device that sprays ultra-high pressure fluid to cut objects. related to the assembly.

0002

[Conventional technology]

Conventionally, the nozzle assembly of this type of fluid jet device has been disclosed in, for example, Japanese Unexamined Patent Publication No. 1-2524. It is described in Publication No. 00. This conventional nozzle assembly is as shown in FIG. , a nozzle B having a nozzle hole a is attached to the tip side of the nozzle body A; A metal such as stainless steel is placed at a predetermined distance from the nozzle B inside the proximal end of the nozzle B. An orifice consisting of an integral body of a spherical body C and a cylindrical stabilizer body D. An element E is disposed on the outer peripheral wall of the body A, and the tip thereof is connected to the stabilizer. It consists of three centering screws F that come into contact with the outer peripheral surface of body D with a phase difference of 120 degrees. By screwing each alignment screw F, the orifice passage b of the orifice element E is aligned with the nozzle. A centering means G for aligning the axis of the hole a is provided, and A negative pressure chamber K is provided between the stabilizer body D and the nozzle B, and an opening is provided to this negative pressure chamber K. A supply path H for the abrasive material to be used is formed. Then, the alignment is performed by the alignment means G. An ultra-high pressure fluid is injected from the orifice element E toward the nozzle B, and the ultra-high pressure fluid is The flow rate of the pressure fluid causes the inside of the negative pressure chamber K to become negative pressure, and this negative pressure causes the supply path H to become negative. The abrasive material is sucked into the negative pressure chamber K from the to cut the object by mixing it with the nozzle B and spraying it to the outside from the nozzle B. I have to.

0003 Also, conventionally, as shown in FIG. 4, the orifice passage b in the orifice element E An orifice O is provided at the inlet of the The orifice passage b is formed to have a larger diameter than the orifice O, and the inside of the negative pressure chamber K is The abrasive material sucked into the negative pressure chamber K due to the negative pressure is injected from the orifice O. Orifice elements have also been developed that facilitate mixing with ultrahigh pressure fluids.

0004

[Problem that the idea aims to solve]

However, in the nozzle assembly equipped with the orifice element shown in FIG. When injecting ultra-high pressure fluid from the orifice O of the gas element E toward the nozzle B, The circumference of the jet flow of the fluid in the orifice passage b in the stabilizer body D The surrounding area becomes negative pressure, and due to this negative pressure, a part of the abrasive material sucked into the negative pressure chamber K The abrasive material is sucked into the orifice passage b, and the abrasive material is sucked into the orifice O. The ultra-high pressure fluid that is injected from the source hits the surrounding area and bounces onto the inner peripheral surface of the orifice passage b. The rebound abrasive material causes the orifice element E made of stainless steel to The orifice passage b is worn out, especially the orifice on the stabilizer body D side. The orifice passage b on the stabilizer body D side is easily worn out. If the orifice element E is worn out, the orifice element E will move due to an external force during work, etc., and the orifice element E will move. The orifice passage b is misaligned with respect to the nozzle hole a, and the centering means G is used to readjust it. When performing alignment, in other words, screw each of the alignment screws F, and use the tip of the alignment screw F to align the alignment screw F. When realigning the fiss element E by swinging it around the spherical body C, the front The stabilizer body D may become insufficient in strength due to internal wear and may be damaged. This makes it impossible to center the orifice element E using the centering screw F. In addition, in such a case, the orifice element E is connected to the spherical body C and the cylindrical stabilizer body D. Since it is formed as an integral part with the stabilizer body, only the stabilizer body Even when worn out, it is necessary to replace the entire orifice element E with a new one. However, there was a problem of high running costs.

[0005] This invention was created in view of the above problems, and its purpose is to improve the orifice requirements. Increases the durability of the orifice element as a whole without making the entire element of wear-resistant material. The nozzle hole of the nozzle and the orifice of the orifice element can be If misalignment occurs between the orifice element and the orifice passage, the orifice element can be realigned. Moreover, the fluid jet device reduces running costs by reducing the number of replacement parts. An object of the present invention is to provide a nozzle assembly.

[0006]

[Means to solve the problem]

In order to achieve the above object, the present invention also includes a nozzle body 1 and a nozzle hole 21. A nozzle 2 is attached to the distal end of the body 1, and a nozzle 2 is attached to the proximal end of the body 1. The body includes an orifice element 3 disposed to be separated from the nozzle 2 by a predetermined distance. 1, the orifice passage 31 in the orifice element 3 is connected to the nozzle hole 21. In a nozzle assembly for a fluid jet device, which is provided with an alignment means 4 that aligns the axis of the , the orifice element 3 is connected to a spherical body 32 having an orifice 32a and a cylindrical star. This stabilizer body 33 is made of carbide material as a two-piece configuration with the stabilizer body 33. a coupling portion for coupling the stabilizer body 33 to the body 32; 34 is provided to connect the stabilizer body 33 to the body 32. It is something to do.

[0007] The nozzle body 1 also has a primary side sealing surface 35 of the spherical body 32 and a secondary side sealing surface 35 of the spherical body 32. An atmosphere opening part 13 is provided to open the space between the spherical body and the next side sealing surface 36 to the atmosphere. 32, a communication hole that communicates the inside of the stabilizer body 33 with the atmosphere opening part 13; 37 is preferably provided.

[0008]

[Effect]

In the above nozzle assembly, the orifice element 3 is connected to the spherical body 32. It consists of two pieces including a stabilizer body 33, and this stabilizer body 33 is made of carbide material. The stabilizer body 33 is integrally connected to the body 32 via the connecting portion 34. Since the stabilizer body 33 side is easily worn by abrasive materials, The wear resistance of the orifice element 3 is enhanced, and the durability of the orifice element 3 as a whole is improved. As a result, the life of the orifice element 3 can be extended. Also, the above step Since the stabilizer body 33 is made of a carbide material and has increased strength, the nozzle There is a core between the nozzle hole 21 of the orifice element 3 and the orifice passage 31 of the orifice element 3. Even when the alignment means 4 performs a re-alignment operation due to the occurrence of alignment, the stabilizer body The re-alignment work of the orifice element 3 can be carried out without the strength of the orifice element 3 being insufficient. This can be done accurately, and the stabilizer body 33 will not wear out with long-term use. Even if the orifice element 3 is replaced in its entirety, the It is now possible to replace only the stabilizer body 33 with a new one, making it possible to run Costs are reduced.

[0009] Further, the nozzle body 1 is provided with a primary sealing surface 35 of the spherical body 32 and a secondary sealing surface 35 of the spherical body 32. An atmosphere opening part 13 is provided to open the space between the side sealing surface 36 and the spherical body 3 to the atmosphere. 2, a communication hole 3 that communicates the inside of the stabilizer body 33 with the atmosphere opening part 13; 7, the orifice in the stabilizer body 33 is provided through the communication hole 37. The orifice passage 31 is opened to the atmosphere, and ultra-high pressure fluid is injected from the orifice 32a. Since the accompanying negative pressure in the orifice passage 31 in the stabilizer body 33 is reduced, the stabilizer The wear of the stabilizer body 33 due to the abrasive material is reduced, making it possible to extend its life even further. Becomes Noh.

0010

【Example】

Figure 2 shows the overall structure of a nozzle assembly in a fluid jet device. Inside, 1 is a nozzle body, and a nozzle is provided on the front end side of the nozzle body 1 in the fluid ejection direction. A nozzle 2 having a nozzle hole 21 is attached to the body 1 through a screw body N. An orifice passage 31 is provided inside the base end side at a predetermined distance from the nozzle 2. On the other hand, the orifice element 3 is disposed on the outer peripheral wall of the body 1. Align the orifice passage 31 of the orifice element 3 with respect to the axis of the nozzle hole 21 A centering means 4 is provided.

[0011] The centering means 4 of the orifice element 3 has a tip that is aligned with the orifice element 3, which will be described in detail later. Three alignment screws 4 are brought into contact with the outer peripheral surface of the stabilizer body 33 with a phase difference of 120 degrees. 1, and each of these centering screws 41 is inserted into a screw hole 1a drilled in the body 1. By screwing each centering screw 41, the stabilizer is attached at each tip. The riser body 33 is made to swing around the spherical body 32 of the orifice element 3. Accordingly, the nozzle in which the orifice passage 31 of the orifice element 3 is provided in the nozzle 2 The center of the hole 21 is aligned with the axis of the hole 21.

0012 Further, on the base end side of the nozzle body 1, an orifice of the orifice element 3 is provided. A nozzle tube 5 having a fluid injection path 51 communicating with the passage 31 is inserted into the orifice. It is assembled via a gland nut 6 so as to face the base element 3. on the body 1 side When assembling the nozzle tube 5, make sure to A collar 7 is provided with a threaded portion 52 and has a screw hole 71 that is screwed into the threaded portion 52. Then, by screwing the screw hole 71 into the screw portion 52, the collar 7 can be moved forward. The collar is held on the outer circumference of the distal end of the tube 5, and the collar is held on the proximal end side of the body 1. A screw hole 11 is formed in the opposite direction to the screw hole 71 of -7, and the tip of the nut 6 is A threaded portion 61 to be screwed into the threaded hole 11 is provided on the outer periphery of the nut 6. An insertion hole 62 into which the collar 7 is inserted is formed inside. And said tube The nut 6 is inserted into the outer peripheral side of the tip of the nut 6, and the threaded portion 61 of the nut 6 is inserted into the bolt. By tightening the collar 7 into the screw hole 11 of the D 1, the upper end of the collar 7 fits into the insertion hole. 62, and due to this contact resistance, the collar 7 is integrated with the nut 6. The rotation of the collar 7 causes the tube 5 to move relatively downward, and the tube 5 is rotated. The lower end of the tube 5 is fixed to the orifice element 3 side in a press-contact manner.

[0013] Furthermore, a negative pressure chamber 10 is formed between the orifice element 3 and the nozzle 2, and this A communication hole 8 is provided in the negative pressure chamber 10 to communicate the orifice passage 31 and the nozzle hole 21. A wear insert 8 made of cemented carbide with In addition, the communication hole 81 of the wear insert 8 is connected to the body 1. The abrasive supply channel 12 formed between the orifice element 3 and the nozzle 2 It's set. The wear insert 8 is fixed to the body 1 via a screw body J. has been established.

[0014] The ultra-high pressure water introduced from the fluid injection path 51 of the nozzle tube 5, etc. The ultra-high pressure fluid is passed from the orifice passage 31 of the orifice element 3 to the nozzle hole. 21 to create a negative pressure in the communication hole 81 of the wear insert 8, and this The abrasive material is introduced into the communication hole 81 from the supply path 12 by negative pressure, and the abrasive material is and an ultra-high pressure fluid is injected to the outside from the nozzle hole 21 of the nozzle 2. The object to be cut is cut.

[0015] However, in the above configuration, as clarified in FIG. The element 3 is composed of two pieces: a spherical body 32 and a cylindrical stabilizer body 33. , diamond or sapphire is placed on the side of the body 32 opposite to the nozzle tube 5. The orifice 32a consisting of A coupling part 34 consisting of a coupling hole is provided on the opposite side of the body 32 from the orifice 32a, The stabilizer body 33 is inserted into the joint portion 34, and this insertion portion is sealed with adhesive. The stabilizer body 33 is integrally connected to the body 32 by fixing at the let

[0016] The stabilizer body 33 of the orifice element 3 is made of tungsten carbide composite. Made of wear-resistant cemented carbide materials such as gold and other cemented carbide materials and ceramics. Further, the body 32 is made of stainless steel or the like which is softer than the stabilizer body 33. In other words, the abrasive material is likely to wear out during the cutting work of the object to be cut as described above. The stabilizer body 33 side is formed of a carbide material, and the body 3 is relatively hard to wear. The second side is made of stainless steel which is softer than the stabilizer body 33, has a lower material cost, and is easier to process. In this way, the orifice can be formed relatively inexpensively. The durability of the element 3 as a whole can be improved, and this orifice element 3 The lifespan of the product will be extended. Further, the stabilizer body 34 is formed of a superhard material. Due to the enhanced strength, the orifice element 3 moves due to external force and the nozzle There is a core between the nozzle hole 21 of the orifice element 3 and the orifice passage 31 of the orifice element 3. When performing re-alignment work by the alignment means 4 when a misalignment occurs, that is, each alignment Turn the screws 41 to insert the stabilizer body 33 into the orifice with each tip. While swinging the spherical body 32 of the space element 3, the orifice passage 31 and the nozzle are opened. Also when performing alignment with the shift hole 21, the stabilizer body 33 may lack strength. To accurately and reliably perform the re-alignment work of the orifice element 3 without Furthermore, the body 32 side is made of a relatively soft material such as stainless steel. Therefore, when performing the above alignment work, cracks etc. may occur on the body 32 side. It will no longer occur. Further, normally, the inner diameter of the stabilizer body 33 is 1.5 mm, whereas in the present invention, the inner diameter is expanded to about 2.0 mm. , the negative pressure generated within the stabilizer body 33 is reduced, and wear caused by the abrasive material is reduced. I'm trying to make it happen.

[0017] Moreover, the orifice element 3 is connected to the spherical body 32 and the stabilizer body 33. By adopting a two-piece configuration, this stabilizer body 33 will not wear out with long-term use. Even if the orifice element 3 is replaced in its entirety, the It is now possible to replace only the stabilizer body 33 with a new one, which makes it easier to use. This reduces running costs.

[0018] Further, the spherical body 32 of the orifice element 3 is connected to the spherical body 32 of the gland nut 6. By tightening the nozzle body 1, the body 32 is mated with the nozzle tube 5. a primary side sealing surface 35 facing the nozzle body 1 of the body 32; The next side sealing surface 36 is brought into contact with the tube 5 and the body 1 side, respectively, Each of the sealing surfaces 35 and 36 connects the fluid injection path 51 in the tube 5 with the orifice. A spherical seal is formed between the space element 3 and the orifice passage 31, and the body 32 is While the sealing surfaces 35 and 36 are in sliding contact with the tube 5 and the body 1, The centering operation is performed by the centering means 4 as described above.

[0019] and between each sealing surface 35 and 36 of the body 32 in the nozzle body 1. An atmosphere opening part 13 is formed to be open to the atmosphere, and each of the sealing surfaces 35 and 36 is The stabilizer is configured to discharge leaked fluid from the body 32 to the outside. A communication hole 37 is formed that communicates the inside of the easer body 33 with the atmosphere opening portion 13 . child When the inner diameter of the stabilizer body 33 is 2.0 mm, the communication hole 37 has a diameter of 0.3 mm. By adjusting the hole diameter, generation of negative pressure inside the stabilizer body 33 is eliminated. It is possible.

[0020] When the above configuration is adopted, the above-mentioned The inside of the stabilizer body 33 is opened to the atmosphere, and the inside of the stabilizer body 33 is The negative pressure caused by the injection of ultra-high pressure fluid is reduced, and this negative pressure stabilizes the abrasive material. Since the amount of suction into the stabilizer body 33 is reduced, the abrasive material of the stabilizer body 33 is This reduces the amount of wear that occurs, making it possible to extend the service life even further.

[0021]

[Effect of the idea]

As explained above, in the nozzle assembly of the present invention, the orifice element 3 is Two-piece construction consisting of a spherical body 32 with a fist 32a and a cylindrical stabilizer body 33 In this case, the stabilizer body 33 is formed of a superhard material, and the body 3 is made of a superhard material. 2 is provided with a connecting portion 34 that connects the stabilizer body 33, and this connecting portion 34 Since the stabilizer body 33 is coupled to the body 32, the stabilizer body 33 is connected to the body 32. The abrasion of the stabilizer body 33 due to the abrasive material can be reduced, and the abrasion resistance of the stabilizer body 33 can be reduced. can be improved. Therefore, the entire orifice element 3 is made of carbide material. Despite this, the durability of the orifice element 3 as a whole can be improved and it can be It can be used as such. Also, the orifice element 3 has an orifice opening. If misalignment occurs between the passage 31 and the nozzle hole 21 of the nozzle 2, the orifice The realignment work of the stabilizer element 3 can be performed accurately, and the stabilizer body 33 can be re-aligned accurately. Since only the parts can be replaced, running costs can be reduced.

[0022] Further, the nozzle body 1 is provided with a primary side sealing surface 35 of the spherical body 32 and a secondary side sealing surface 35 of the spherical body 32. An atmosphere opening section 13 is provided to open the space between the fuselage 32 and the front surface 36 to the atmosphere. A communication hole 37 is formed that communicates the inside of the stabilizer body 33 with the atmosphere opening part 13. By doing so, the negative pressure generated within the stabilizer body 33 can be reduced, and the Abrasion of the stabilizer body 33 due to the abrasive material can be reduced, and its lifespan can be extended. Becomes Noh.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing essential parts of a nozzle assembly according to the present invention.

FIG. 2 is a longitudinal sectional view showing the overall structure of the nozzle assembly.

FIG. 3 is a sectional view showing a conventional example.

FIG. 4 is a sectional view of only an orifice element showing a conventional example.

[Explanation of symbols]

1 Nozzle body 13 Atmospheric release section 2 nozzles 21 Nozzle hole 3 Orifice element 31 Orifice passage 32 Spherical body 32a Orifice 33 Stabilizer body 34 Joint part 35 Primary side seal surface 36 Secondary side seal surface 37 Communication hole 4 Alignment means

Claims (2)

[Scope of utility model registration request] 1. A nozzle body 1, a nozzle 2 having a nozzle hole 21 and attached to the distal end side of the body 1, and an orifice element disposed inside the proximal end side of the body 1 so as to be separated from the nozzle 2 by a predetermined distance. 3, in the body 1,
The orifice passage 31 in the orifice element 3,
This is a nozzle assembly for a fluid jet device, which is provided with an alignment means 4 for aligning the axis of the nozzle hole 21, in which the orifice element 3 is composed of a spherical body 32 having an orifice 32a and a cylindrical stabilizer body 33. As a two-piece structure, the stabilizer body 33 is formed of a superhard material, and a connecting portion 34 for connecting the stabilizer body 33 to the body 32 is provided to connect the stabilizer body 33 to the body 32. A nozzle assembly for a fluid jet device characterized by: 2. The nozzle body 1 is provided with an atmosphere opening part 13 that opens to the atmosphere between the primary side sealing surface 35 and the secondary side sealing surface 36 of the spherical body 32, and the spherical body 32 is provided with a stabilizer body 33. 2. The nozzle assembly for a fluid jet device according to claim 1, further comprising a communication hole (37) that communicates the inside of the body with the atmosphere opening portion (13).