Spray gun structure capable of rapidly switching spray heads

Abstract

The utility model relates to a spray gun structure capable of quickly switching spray nozzles, which comprises a spray pipe, a gland, a cylinder, a connecting sleeve, a torque rotating block and a gun body component, the gland is connected with the cylinder, a plurality of pipe holes are arranged on the gland along the circumferential direction, and the spray pipe capable of sliding along the pipe holes is arranged in the pipe holes; the cylinder is in running fit with the torque rotating block, the connecting sleeve is sleeved outside the cylinder and the torque rotating block, and the cylinder and the torque rotating block are fixedly locked or loosened by adjusting the limiting assembly; a cavity is formed inside the torque rotating block, a guide groove is formed outside the torque rotating block, a protruding structure is arranged on the bottom face of the guide groove, an inlet section of the cavity is communicated with an outlet of the gun body assembly, an outlet section of the cavity is located inside the protruding structure, a communicating hole used for being in butt joint with an inlet of the spray pipe is formed in the end face of the protruding structure, and guide faces are arranged on the two sides of the protruding structure respectively. And one end of the spring is connected with the gland, and the other end of the spring is a free end. According to the utility model, the operation convenience of switching the spray pipes with different specifications is improved, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mold cleaning, in particular to a spray gun structure for quickly switching spray heads. Background Art

[0002] During the casting process, the mold surface is often attached with various oil or other stains due to long-term production. In order to ensure product quality, mold cleaning becomes an inevitable task. Common cleaning methods are generally divided into offline cleaning and online cleaning. Offline cleaning is the maintenance of the mold off the machine, and the mold cavity is shot peened with steel shot. Online cleaning is when the mold is installed on the equipment, the mold cavity is treated with solid dry ice particles in a similar way to shot peening. Since dry ice sublimates at room temperature, using dry ice to clean the mold will not generate dust on site, which is relatively environmentally friendly and safe, and there is no need to disassemble the mold, so dry ice cleaning is more widely used. However, the problem with dry ice cleaning is that when cleaning molds with more complex structures, in order to ensure the cleaning effect, it is necessary to constantly replace nozzles of different specifications and adjust the cleaning angle according to the characteristics of the mold structure, which inevitably leads to delays in production rhythm and a decrease in casting quality. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a spray gun structure with a quick-switchable spray head, aiming to improve the efficiency of switching between spray pipes of different specifications and to improve the convenience of use.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A spray gun structure for quickly switching a spray head comprises a spray pipe, a gland, a cylinder, a connecting sleeve, a torque transfer block and a gun body assembly, wherein:

[0006] The gland is connected to the cylinder, and a plurality of tube holes are arranged on the gland along the circumferential direction, and a nozzle is arranged in each tube hole and can slide along the nozzle;

[0007] The cylinder and the torque block are rotatably matched, and the connecting sleeve is simultaneously sleeved on the outside of the cylinder and the torque block, and the two are locked and fixed or loosened by adjusting the limit assembly;

[0008] The torque transfer block is formed with a cavity inside and a guide groove outside, a convex structure is provided on the bottom surface of the guide groove, the inlet section of the cavity is used to communicate with the outlet of the gun body assembly, the outlet section of the cavity is located inside the convex structure, a connecting hole is provided on the end surface of the convex structure, which is used to form a flow channel after docking with the inlet of the nozzle, and guide surfaces are provided on both sides of the convex structure, which are smoothly connected with the end surface and the bottom surface of the guide groove;

[0009] A spring is sleeved on the nozzle, one end of the spring is connected to the gland, and the other end is a free end;

[0010] When the spray gun structure is in operation, one of the several nozzles installed on the pressure cover is a working tube, and the rest are spare tubes; after the inlet of the working tube is connected to the connecting hole, the free end of the spring arranged outside the working tube abuts against the outer periphery of the connecting hole, and at the same time, the inlet of each spare tube and the free end of the spring arranged outside the working tube abut against the bottom surface of the guide groove.

[0011] Further technical solutions are:

[0012] The outer periphery of the communicating hole is formed with an inner concave arc surface, the outer periphery of the inner concave arc surface is formed with a guide arc surface, the inlet end of the nozzle is provided with an outer convex arc surface matching with the inner concave arc surface, and the inlet is located on the outer convex arc surface.

[0013] The depth of the concave arc surface is 1-2 mm.

[0014] The adjustment limit assembly comprises a key block, the key block is provided with a mounting hole; the cylinder is provided with a first limit groove, the torque conversion block is provided with a second limit groove corresponding to the first limit groove, the first limit groove and the second limit groove are connected to form a through groove capable of accommodating the key block, and the connecting sleeve is provided with a notch for making way corresponding to the through groove;

[0015] The first limiting groove or the second limiting groove is provided with a hole position corresponding to the mounting hole and used for mounting the locking member.

[0016] The nozzle apertures of the plurality of nozzles are different.

[0017] A clamping groove is provided on the lower side of the gland to prevent the working pipe from tipping over.

[0018] A hollow portion is provided on the side wall of the cylinder.

[0019] The torque conversion block is provided with a step surface which is rotatably matched with the cylinder.

[0020] The key block is provided with a convex column.

[0021] The structure of the gun body assembly comprises an adapter sleeve, a gun body and a connecting pipe. The inlet end of the gun body is connected to the connecting pipe, and the outlet end of the gun body is connected to the torque transfer block through the adapter sleeve.

[0022] The beneficial effects of the utility model are as follows:

[0023] The utility model integrates nozzles of different specifications on the gland, connects the gland to the cylinder, utilizes the relative movement of the cylinder and the torque block, applies a thrust force to the nozzle during rotation through the guide surfaces on both sides of the convex structure on the torque block, and then utilizes the plastic rebound of the spring to achieve rapid switching of different nozzles. Compared with the prior art nozzle spray gun device with only a single specification, especially when cleaning a mold with a more complex structure, it avoids the work of frequent disassembly and assembly of the nozzle, greatly reduces the cumbersomeness of the operation, saves the time required for replacing the nozzle, improves the convenience of operation and work efficiency, and has strong versatility.

[0024] Other features and advantages of the present invention will be described in the following description or will be understood by implementing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model.

[0026] Figure 2 It is a structural schematic diagram of the gland of the utility model.

[0027] Figure 3 It is a structural schematic diagram of the cylinder of the utility model.

[0028] Figure 4 It is a structural schematic diagram of the torque conversion block of the utility model.

[0029] Figure 5 It is a structural schematic diagram of the nozzle of the utility model.

[0030] Figure 6 for Figure 4 Another perspective of .

[0031] Figure 7 It is a structural schematic diagram of the connecting sleeve of the utility model.

[0032] Figure 8 It is a structural schematic diagram of the key block of the utility model.

[0033] Fig. 9 for Figure 1 main view.

[0034] In the figure: 1. nozzle; 2. gland; 3. cylinder; 4. spring; 5. torque block; 6. connecting sleeve; 7. key block; 8. adapter sleeve; 9. gun body; 10. connecting pipe; 21. pipe hole; 22. slot; 31. first limiting groove; 32. hollow part; 50. step surface; 51. raised structure; 52. guide surface; 53. connecting hole; 54. concave arc surface; 55. guide arc surface; 56. guide groove; 57. second limiting groove; 58. threaded structure; 59. inlet cavity; 61. clearance gap; 71. boss; 72. mounting hole; 101. convex arc surface. DETAILED DESCRIPTION

[0035] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0036] See also Figures 1 to 4 , Fig. 9 The spray gun structure of the quick-switching spray head of this embodiment includes a spray pipe 1, a gland 2, a cylinder 3, a connecting sleeve 6, a torque transfer block 5 and a gun body assembly, wherein:

[0037] The gland 2 is connected to the cylinder 3. The gland 2 is provided with a plurality of tube holes 21 along the circumferential direction. A nozzle 1 is provided in each tube hole 21 and can slide along the tube hole.

[0038] The cylinder 3 and the torque block 5 are rotated together, and the connecting sleeve 6 is simultaneously sleeved on the outside of the cylinder 3 and the torque block 5, and the two are locked and fixed or loosened by adjusting the limit assembly;

[0039] The torque conversion block 5 has a cavity formed inside and a guide groove 56 formed outside. A protruding structure 51 is provided on the bottom surface of the guide groove 56. The inlet section of the cavity is used to communicate with the outlet of the gun body assembly. The outlet section of the cavity is located inside the protruding structure 51. A connecting hole 53 is provided on the end surface of the protruding structure 51, which is used to form a flow channel after docking with the inlet of the nozzle 1. Guide surfaces 52 are provided on both sides of the protruding structure 51, which are smoothly connected with the end surface and the bottom surface of the guide groove 56.

[0040] A spring 4 is sleeved on the nozzle 1, one end of the spring 4 is connected to the gland 2, and the other end is a free end;

[0041] When the spray gun structure is in operation, one of the several nozzles 1 installed on the pressure cap 2 is a working tube, and the rest are spare tubes; after the inlet of the working tube is connected to the connecting hole 53, the free end of the spring 4 arranged outside the working tube abuts against the outer periphery of the connecting hole 53, and at the same time, the inlet of each spare tube and the free end of the spring 4 arranged outside the working tube abut against the bottom surface of the guide groove 56.

[0042] like Figure 4 and Figure 5 As shown, the outer periphery of the connecting hole 53 is formed with an inner concave arc surface 54 , and the outer periphery of the inner concave arc surface 54 is formed with a guide arc surface 55 . The inlet end of the nozzle 1 is provided with an outer convex arc surface 101 matching with the inner concave arc surface 54 , and the inlet is located on the outer convex arc surface 101 .

[0043] Specifically, the depth of the concave arc surface 54 is 1-2 mm.

[0044] Specifically, a clamping groove 22 is provided on the lower side of the pressure cover 2, which is used to prevent the nozzle 1 serving as the working pipe from tipping over during the rotation of the cylinder 3 during switching.

[0045] The pressure cap 2 can ensure that the nozzle 1 is placed vertically to prevent tilting. The pressure cap 2 can be fastened with the cylinder 3 by screws. When switching, the nozzle 1, the pressure cap 2, the cylinder 3, and the spring 4 rotate together.

[0046] like Figures 1 to 3 , Figure 7 , Figure 8 As shown, the adjustment limit assembly includes a key block 7, which is provided with a mounting hole 72; the cylinder 3 is provided with a first limit groove 31, and the torque conversion block 5 is provided with a second limit groove 57 corresponding to the first limit groove 31. After the first limit groove 31 and the second limit groove 57 are connected, a through groove that can accommodate the key block 7 is formed, and the connecting sleeve 6 is provided with a makeshift notch 61 corresponding to the through groove.

[0047] like Figure 6 As shown, the torque conversion block 5 is provided with a step surface 50 which is rotatably matched with the cylinder 3 .

[0048] Specifically, a protruding column 71 is provided on the key block 7 to facilitate the adjustment of the key block 7 to move along the through slot.

[0049] Specifically, a hole corresponding to the mounting hole 72 and used for mounting the locking member is provided on the first limiting groove 31 or the second limiting groove 57 .

[0050] In this embodiment, the rapid switching of the nozzle can be achieved by adjusting the rotation of the cylinder 3 and the torque block 5. The specific process is as follows:

[0051] The initial state is Figure 1 and Fig. 9 As shown, the key block 7 is located in the clearance notch 61 of the connecting sleeve 6, and is clamped in the through groove formed by the first limiting groove 31 and the second limiting groove 57. The key block 7 is locked with the through groove by a locking member (such as a screw) through the mounting hole 72 thereon. At this time, the cylinder 3 and the torque conversion block 5 cannot rotate relative to each other. When the nozzle 1 needs to be switched, the locking member is removed, and the key block 7 is moved downward along the through groove (see Figure 1 ) pushes the key block 7 to withdraw from the first limit groove. At this time, the cylinder 3 and the torque block 5 are relatively rotated through the step surface 50. During the rotation of the cylinder 3, the inlet end of the working pipe slides out of the connecting hole 53 and slides along the guide arc surface 55. Under the action of the spring 4, it moves to the inside of the pressure cover 2. At the same time, a spare pipe located downstream of the working pipe in the rotation direction, the convex arc surface 101 at the inlet end of the spare pipe slides with the bottom surface of the guide groove 56, and then slides along the guide surface 52 until it docks with the connecting hole 53. At the same time, the outlet end extends out of the outside of the pressure cover 2, that is, a nozzle switching is completed. Continuous rotation of the cylinder 3 can achieve continuous switching of the nozzles.

[0052] Among them, the nozzle apertures of the plurality of nozzles 1 are different, so that the switching of nozzles with different diameters can be realized.

[0053] A hollow portion 32 is provided on the side wall of the cylinder 3 to facilitate observation of the switching of the nozzle.

[0054] The guide surface 52 has a certain curvature, thereby providing a certain extension torque for the nozzle 1 during the rotation process, so that it extends outward from the gland 2, realizing the switch from the standby tube to the working tube. After the nozzle 1 rotates again, the spring 4 rebounds plastically, and the nozzle 1 retreats and extends into the inner side of the gland 2, realizing the switch from the working tube to the standby tube, thereby realizing the switch of nozzles of different specifications (tube diameter, nozzle size, etc.).

[0055] During operation, in order to prevent the nozzle 1 from being misaligned due to the vibration caused by the dry ice blasting process during the rotation of the cylinder 3, the relative position of the cylinder 3 and the connecting sleeve 6 is ensured by braking the key block 7.

[0056] like Figure 1 As shown, the structure of the gun body assembly includes an adapter sleeve 8, a gun body 9 and a pipe 10, the inlet end of the gun body 9 is connected to the pipe 10, and the outlet end of the gun body 9 is connected to the torque transfer block 5 through the adapter sleeve 8.

[0057] Specifically, Figure 6 As shown, a threaded structure 58 is used at the end of the torque conversion block 5 to be tightly connected with the adapter sleeve 8, and then the gun body and the pipe are connected to form a whole. The adapter sleeve 8 of different calibers can be replaced to achieve the connection of gun bodies of different specifications.

[0058] During operation, the jet switch button of the gun body 9 is activated, and dry ice enters from the connecting pipe 10, and successively enters the gun body 9, the inlet cavity 59 (the inlet section of the cavity) of the torque converter 5, enters the nozzle 1 from the inside of the protruding structure 51 (the outlet section of the cavity), and is ejected from the nozzle 1.

[0059] Those skilled in the art can understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A spray gun structure for quickly switching nozzles, characterized in that: It comprises a nozzle (1), a gland (2), a cylinder (3), a connecting sleeve (6), a torque converter (5) and a gun body assembly, wherein: The gland (2) is connected to the cylinder (3), and a plurality of tube holes (21) are provided on the gland (2) along a circumferential direction, and a nozzle (1) is provided in each tube hole (21) and is capable of sliding along the tube hole; The cylinder (3) and the torque block (5) are rotatably matched, and the connecting sleeve (6) is simultaneously sleeved on the outside of the cylinder (3) and the torque block (5), and the two are locked and fixed or loosened by adjusting the limit assembly; The torque conversion block (5) has a cavity formed inside and a guide groove (56) formed outside. A protruding structure (51) is provided on the bottom surface of the guide groove (56). The inlet section of the cavity is used to communicate with the outlet of the gun body assembly. The outlet section of the cavity is located inside the protruding structure (51). A connecting hole (53) is provided on the end surface of the protruding structure (51) for forming a flow channel after docking with the inlet of the nozzle (1). Guide surfaces (52) are provided on both sides of the protruding structure (51) and are smoothly connected to the end surface and the bottom surface of the guide groove (56). The nozzle (1) is sleeved with a spring (4), one end of the spring (4) is connected to the gland (2), and the other end is a free end; During the operation of the spray gun structure, one of the plurality of spray pipes (1) installed on the pressure cap (2) is a working pipe, and the rest are standby pipes; after the inlet of the working pipe is connected to the connecting hole (53), the free end of the spring (4) provided outside the working pipe abuts against the outer periphery of the connecting hole (53), and at the same time, the inlet of each standby pipe and the free end of the spring (4) provided outside the working pipe abut against the bottom surface of the guide groove (56).

2. The spray gun structure for rapidly switching nozzles according to claim 1, characterized in that: The outer periphery of the communicating hole (53) is formed with an inner concave arc surface (54), and the outer periphery of the inner concave arc surface (54) is formed with a guide arc surface (55). The inlet end of the nozzle (1) is provided with an outer convex arc surface (101) matching the inner concave arc surface (54), and the inlet is located on the outer convex arc surface (101).

3. The spray gun structure for fast switching nozzles according to claim 2, characterized in that: The depth of the concave arc surface (54) is 1-2 mm.

4. The spray gun structure for rapidly switching spray heads according to claim 1, characterized in that: The adjustment limit assembly comprises a key block (7), and a mounting hole (72) is provided on the key block (7); a first limit groove (31) is provided on the cylinder (3), and a second limit groove (57) corresponding to the first limit groove (31) is provided on the torque conversion block (5); the first limit groove (31) and the second limit groove (57) are connected to form a through groove capable of accommodating the key block (7); and a clearance notch (61) corresponding to the through groove is provided on the connecting sleeve (6); The first limiting groove (31) or the second limiting groove (57) is provided with a hole position corresponding to the mounting hole (72) and used for mounting a locking member.

5. The spray gun structure for fast switching nozzles according to claim 1, characterized in that: The nozzle apertures of the plurality of nozzles (1) are different.

6. The spray gun structure for fast switching nozzles according to claim 1, characterized in that: The lower side of the gland (2) is provided with a clamping groove (22) for preventing the working tube from tipping over.

7. The spray gun structure for rapidly switching spray heads according to claim 1, characterized in that: A hollow portion (32) is provided on the side wall of the cylinder (3).

8. The spray gun structure for rapidly switching spray heads according to claim 1, characterized in that: The torque conversion block (5) is provided with a step surface (50) that is rotationally matched with the cylinder (3).

9. The spray gun structure for rapidly switching spray heads according to claim 4, characterized in that: The key block (7) is provided with a protruding column (71).

10. The spray gun structure for fast switching nozzles according to claim 1, characterized in that: The structure of the gun body assembly comprises an adapter sleeve (8), a gun body (9) and a connecting pipe (10); the inlet end of the gun body (9) is connected to the connecting pipe (10), and the outlet end of the gun body (9) is connected to the torque transfer block (5) via the adapter sleeve (8).

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