Combined nozzle of jet mill

Abstract

The utility model provides a jet mill combined type nozzle. The jet mill combined type nozzle comprises a sleeve, a spray head and a pipe joint. The front end of an inner hole of the sleeve is of a conical hole structure, and the rear end of the inner hole is a threaded hole. The nozzle comprises a nozzle part and a main body part which are coaxial, the nozzle part and the main body part are both of a cylindrical structure, the outer diameter of the nozzle part is smaller than that of the main body part, the junction of the nozzle part and the main body part is an outer conical surface, and a channel is formed in the nozzle in the axis direction; the nozzle is slidably arranged in the sleeve, the nozzle portion penetrates through the front end of the sleeve, and the outer conical surface is matched with the conical hole structure of the sleeve. External threads are arranged at the front end of the pipe joint and used for being connected with the threaded hole of the sleeve, when the pipe joint is connected with the sleeve, the front end of the pipe joint is pressed on the end face of the main body part, and a sealing ring is arranged on the inner wall of the rear end of the pipe joint. According to the scheme, the service life of the spray head can be effectively prolonged, and the spray head is lower in manufacturing price and more convenient to replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of air flow mill nozzle structures, in particular to an air flow mill combined nozzle. Background Art

[0002] The air jet mill compresses the air and then injects a high-pressure air flow into the grinding chamber through a nozzle, causing the material to move at high speed and collide with each other, thereby achieving the purpose of grinding. Existing air jet mill nozzles are usually integral structures and are connected to the side wall of the grinding chamber with screws, or are directly connected to the grinding chamber using a threaded connection. Because the nozzle is usually made of metal and its front end is located inside the grinding chamber, after long-term use, the front end of the nozzle will be severely worn, causing the inner hole at the front end of the nozzle to expand, resulting in a decrease in gas flow rate, and thus reducing the grinding effect. Existing nozzles can only be replaced as a whole after wear. Not only is the production cost of the nozzle itself high, but the rear end of the nozzle is usually connected to a hard pipe. When replaced, the hard pipe connected to it needs to be disassembled and assembled, so the convenience of replacing the nozzle is poor. Utility Model Content

[0003] In order to solve the deficiencies of the existing technology, the utility model provides an air flow mill combined nozzle, which can effectively extend the service life of the nozzle, has a lower manufacturing price, and is more convenient to replace.

[0004] In order to achieve the purpose of this utility model, the following scheme is proposed:

[0005] A combined jet mill nozzle comprises a sleeve, a nozzle and a pipe joint.

[0006] The front end of the inner hole of the casing is a tapered hole structure, and the rear end of the inner hole is a threaded hole.

[0007] The nozzle includes a coaxial nozzle and a main body, both of which are cylindrical structures. The outer diameter of the nozzle is smaller than that of the main body, and the junction between the nozzle and the main body is an outer conical surface. A channel is opened inside the nozzle along the axial direction; the nozzle is slidably arranged in the sleeve, the nozzle passes through the front end of the sleeve, and the outer conical surface cooperates with the conical hole structure of the sleeve.

[0008] The front end of the pipe joint is provided with an external thread for connecting to the threaded hole of the sleeve. When the pipe joint is connected to the sleeve, the front end of the pipe joint will be pressed tightly against the end face of the main body, and the inner wall of the rear end of the pipe joint is provided with a sealing ring.

[0009] The beneficial effects of the present invention are as follows: the nozzle is split into three independent parts: a sleeve, a nozzle and a pipe joint. Only the front end of the nozzle is inserted into the crushing chamber. When the nozzle is worn, only the nozzle needs to be replaced, and the cost of parts replacement is lower. Moreover, the nozzle only needs to be tightened with the pipe joint, without the need to disassemble the hard pipe, and the replacement process is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0011] Figure 1 Shown is an exploded view of the structure of this application.

[0012] Figure 2 Shown is a schematic diagram of the external structure of the assembled application.

[0013] Figure 3 A cross-sectional view of the assembled application is shown.

[0014] Figure 4 Shown Figure 3 A partial enlarged view of point A in the middle.

[0015] Markings in the figure: sleeve-1, nozzle-2, nozzle-21, main body-22, outer conical surface-23, channel-24, pipe joint-3, sealing ring-31, sealing gasket-32, locking screw-4, grinding chamber side wall-9, hard tube-91, annular groove-911. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention are described in detail below with reference to the accompanying drawings. However, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] like Figures 1 to 3 As shown, a jet mill combined nozzle includes: a sleeve 1, a nozzle 2 and a pipe joint 3.

[0018] The front end of the inner hole of the sleeve 1 is a tapered hole structure, and the rear end of the inner hole is a threaded hole.

[0019] The nozzle 2 includes a coaxial nozzle 21 and a main body 22. Both the nozzle 21 and the main body 22 are cylindrical structures. The outer diameter of the nozzle 21 is smaller than the outer diameter of the main body 22, and the junction between the nozzle 21 and the main body 22 is an outer conical surface 23. A channel 24 is opened inside the nozzle 2 along the axial direction; the nozzle 2 is slidably arranged in the sleeve 1, the nozzle 21 passes through the front end of the sleeve 1, and the outer conical surface 23 cooperates with the conical hole structure of the sleeve 1.

[0020] The front end of the pipe joint 3 is provided with an external thread for connecting to the threaded hole of the sleeve 1. When the pipe joint 3 is connected to the sleeve 1, the front end of the pipe joint 3 will be pressed tightly against the end face of the main body 22. The inner wall of the rear end of the pipe joint 3 is provided with a sealing ring 31.

[0021] During installation, the front end of the sleeve 1 is passed through the countersunk hole of the side wall 9 of the crushing chamber, and the sleeve 1 is fixed on the side wall 9 of the crushing chamber; the nozzle 2 is passed through the sleeve 1, and the outer conical surface 23 cooperates with the conical hole structure of the sleeve 1. The mouth 21 passes through the front end of the sleeve 1 and the side wall 9 of the crushing chamber, and protrudes from the inside of the crushing chamber; the pipe joint 3 is connected to the sleeve 1, and the front end of the pipe joint 3 will be pressed against the end face of the main body 22; a hard tube 91 is provided at a predetermined distance outside the side wall 9 of the crushing chamber, and the rear end of the pipe joint 3 is slidably sleeved on the hard tube 91. When the pipe joint 3 is separated from the sleeve 1, the pipe joint 3 can be moved backward along the hard tube 91, thereby making space between the pipe joint 3 and the sleeve 1 to facilitate the disassembly and assembly of the nozzle 2; the sealing ring 31 is used to maintain the seal between the inner wall of the pipe joint 3 and the outer wall of the hard tube 91.

[0022] In this solution, the nozzle is split into three parts: a sleeve 1, a nozzle 2 and a pipe joint 3. Only the front end of the nozzle 2 is inserted into the pulverizing chamber. When the nozzle 2 is worn, only the nozzle 2 needs to be replaced, and the cost of parts replacement is lower. Moreover, the nozzle 2 only needs to be tightened with the pipe joint 3, and there is no need to disassemble the hard tube 91, so the replacement process is more convenient. In this solution, the conical hole structure of the sleeve 1 is used to position the nozzle 2. It is only necessary to adjust the position of the sleeve 1 during the first installation and then fix the sleeve 1 on the side wall 9 of the pulverizing chamber. There is no need to adjust the position of the sleeve 1 when replacing the nozzle 2 subsequently, and the consistency of the installation position of the nozzle 2 can be ensured, which reduces the adjustment link and can further improve the replacement efficiency.

[0023] Preferably, Figure 1 As shown, a flange is provided on the outside of the rear end of the sleeve 1, and the flange is connected to the side wall 9 of the crushing chamber by screws.

[0024] Preferably, the nozzle 2 is made of ceramic to reduce wear and extend service life.

[0025] Preferably, Figure 3 As shown, a sealing gasket 32 is provided between the pipe joint 3 and the end surface of the main body 22 to prevent air leakage.

[0026] Preferably, Figure 1 、 Figure 3 As shown, the rear end of the channel 24 is a trumpet structure to ensure that the airflow smoothly enters the interior of the nozzle 2 and helps to compress the airflow.

[0027] Preferably, Figure 1 、 Figure 2 As shown, the rear end outer wall of the pipe joint 3 is a hexagonal prism structure, so that the pipe joint 3 can be easily disassembled and assembled using a wrench.

[0028] Preferably, Figures 1 to 4As shown, a locking screw 4 is passed through the side wall of the rear end of the pipe joint 3, and the locking screw 4 is located between the rear end face of the pipe joint 3 and the sealing ring 31. An annular groove 911 is provided on the outer wall of the front end of the hard tube 91. When the pipe joint 3 is connected to the sleeve 1, the locking screw 4 is aligned with the annular groove 911, and the front end of the locking screw 4 is stuck in the annular groove 911, which is used to limit the position of the hard tube 91 and the pipe joint 3 along the axial direction to prevent the hard tube 91 from deforming and falling off.

[0029] Preferably, Figure 4 As shown, the sealing ring 31 has a V-shaped cross-section, with its opening facing the front end of the pipe joint 3. When the airflow inside the pipe joint 3 generates pressure on the sealing ring 31, the sealing ring 31 will simultaneously open toward the center and outside of the pipe joint 3, so that the inner side wall of the sealing ring 31 is in close contact with the hard tube 91, and the outer side wall of the sealing ring 31 is in close contact with the inner wall of the pipe joint 3. The greater the air pressure on the sealing ring 31, the greater the pressure generated by the sealing ring 31 on the hard tube 91 and the pipe joint 3, thereby ensuring a good sealing effect.

[0030] The above description is only a preferred embodiment of the present invention and does not represent the only embodiment or limit the present invention. It should be understood by those skilled in the art that various changes or equivalent replacements made to the present invention without departing from the scope of the present invention are within the scope of protection of the present invention.

Claims

1. A jet mill combined nozzle, characterized in that: include: The sleeve (1) has a front end of an inner hole having a conical hole structure and a rear end of the inner hole having a threaded hole; The nozzle (2) comprises a coaxial nozzle (21) and a main body (22), wherein the nozzle (21) and the main body (22) are both cylindrical structures, the outer diameter of the nozzle (21) is smaller than the outer diameter of the main body (22), and the junction between the nozzle (21) and the main body (22) is an outer conical surface (23), and a channel (24) is provided inside the nozzle (2) along the axial direction; the nozzle (2) is slidably arranged in the sleeve (1), the nozzle (21) passes through the front end of the sleeve (1), and the outer conical surface (23) cooperates with the conical hole structure of the sleeve (1); The pipe joint (3) has an external thread at its front end for connecting to the threaded hole of the sleeve (1). When the pipe joint (3) is connected to the sleeve (1), the front end of the pipe joint (3) is pressed tightly against the end face of the main body (22). The inner wall of the rear end of the pipe joint (3) is provided with a sealing ring (31).

2. The jet mill combined nozzle according to claim 1, characterized in that: A flange is provided on the outside of the rear end of the sleeve (1), and the flange is connected to the side wall (9) of the crushing chamber by screws.

3. The jet mill combined nozzle according to claim 1, characterized in that: The nozzle (2) is a ceramic part.

4. The jet mill combined nozzle according to claim 1, characterized in that: A sealing gasket (32) is provided between the pipe joint (3) and the end surface of the main body (22).

5. The jet mill combined nozzle according to claim 1, characterized in that: The rear end of the channel (24) is a horn structure.

6. The jet mill combined nozzle according to claim 1, characterized in that: The rear end outer wall of the pipe joint (3) is a hexagonal prism structure.

7. The jet mill combined nozzle according to claim 1, characterized in that: A locking screw (4) is passed through the side wall of the rear end of the pipe joint (3), and the locking screw (4) is located between the rear end surface of the pipe joint (3) and the sealing ring (31). An annular groove (911) is provided on the outer wall of the front end of the hard tube (91). When the pipe joint (3) is connected to the sleeve (1), the locking screw (4) is aligned with the annular groove (911), and the front end of the locking screw (4) is inserted into the annular groove (911), thereby limiting the position of the hard tube (91) and the pipe joint (3) along the axial direction.

8. The jet mill combined nozzle according to claim 1, characterized in that: The sealing ring (31) has a V-shaped cross-section, with its opening facing the front end of the pipe joint (3).

Images