Sand blasting gun head

Abstract

The sand blasting gun head comprises a first connecting piece used for being connected with an external sand blasting machine and a sand blasting gun barrel with one end detachably connected to the first connecting piece through a locking connecting assembly, a discharging opening is formed in the other end of the sand blasting gun barrel, and the discharging opening forms an inclined first wall face and an inclined second wall face on the circumferential side wall of the sand blasting gun barrel. The distance D1 between the bottoms of the first wall face and the second wall face is smaller than the distance D2 between the tops of the first wall face and the second wall face, the front end of the sand blasting gun barrel is closed through the third wall face so that materials entering the sand blasting gun barrel can be refracted to change the direction after being blocked by the third wall face, and therefore the materials are sprayed out from the discharging port, the sprayed materials are integrally in a fan shape with a small angle, and the spraying efficiency is improved. And the density of the sprayed material is higher. The sand blasting gun tube with the structure is small in spraying area and high in density, can effectively ensure the consistency and uniformity of the sand blasting effect, greatly saves the processing time of workpieces, and is beneficial to saving the production cost of workpiece processing.

Description

Technical Field

[0001] The utility model relates to the technical field of spraying equipment, in particular to a sandblasting gun head. Background Art

[0002] The working principle of the traditional inner hole sandblasting mechanism is to mix compressed air and sand and then spray it out through a spray gun, so that the sand is sprayed onto the inner wall surface of the workpiece. At the same time, the sandblasting gun cannot rotate, and the workpiece needs to rotate. The sandblasting heads in the prior art are generally integrated, and the sandblasting gun barrel is a hollow straight rod tube with openings at both ends, one end for feeding and the other end for discharging (similar to the daily drinking straw, please refer to the sandblasting gun barrel disclosed in the patent authorization text of the authorization announcement number CN214603830U, the patent name is a water-air-sand integrated dust-free and environmentally friendly sandblasting gun head).

[0003] In this type of inner hole sandblasting, the sandblasting effect is limited by the nozzle outlet and the sandblasting pressure. In the prior art, when the material is directly sprayed out from the outlet of the sandblasting gun head, the material is in a funnel shape that spreads outward 360 degrees. The spraying area is too large and the density is too low, making it difficult to ensure the consistency and uniformity of the sandblasting effect, resulting in a long time for spraying the workpiece and failure to spray at the designated position.

[0004] Therefore, how to overcome the above-mentioned defects has become an important issue to be solved urgently by those skilled in the art. Utility Model Content

[0005] The utility model overcomes the shortcomings of the above-mentioned technology and provides a sandblasting gun head.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A sandblasting gun head comprises a first connecting piece for connecting to an external sandblasting machine, a sandblasting gun barrel with one end detachably connected to the first connecting piece through a locking connection assembly, a discharge port is provided at the other end of the sandblasting gun barrel, the discharge port forms an inclined first wall surface and a second wall surface on the circumferential side wall of the sandblasting gun barrel, the distance D1 between the bottom of the first wall surface and the second wall surface is smaller than the distance D2 between the tops, a third wall surface is provided in the sandblasting gun barrel for closing the front end of the sandblasting gun barrel so that the material entering the sandblasting gun barrel can be sprayed out from the discharge port, the lower end of the third wall surface is connected to the inner wall of the sandblasting gun barrel, and the upper end is connected to the second wall surface, the third wall surface is inclined, and its inclination angle is the same as that of the second wall surface.

[0008] Furthermore, the inclination angles of the second wall surface and the third wall surface are 15°-75°.

[0009] Furthermore, it also includes a sealing member 3 detachably arranged in the sandblasting gun barrel 2 to seal the sandblasting gun barrel 2, and the third wall surface is formed on the sealing member.

[0010] Furthermore, the blocking member is made of tungsten steel material.

[0011] Furthermore, the locking connection assembly includes a lock and a second connecting piece detachably connected to the lower end of the lock, the upper end of the lock is detachably connected to the lower end of the first connecting piece, and the lower end of the second connecting piece is detachably connected to the upper end of the sandblasting gun barrel.

[0012] Furthermore, a first internal thread is provided on the inner wall of the upper end of the lock buckle, a first external thread for threaded connection with the first internal thread is provided on the outer wall of the lower end of the first connecting piece, an annular flange is provided on the outer wall of the second connecting piece, an annular groove for the annular flange to be snapped into is provided on the inner wall of the lower end of the lock buckle, a second internal thread is provided on the inner wall of the lower end of the second connecting piece, and a second external thread for threaded connection with the first internal thread is provided on the outer wall of the upper end of the sandblasting gun barrel.

[0013] Furthermore, an inverted tapered channel that is wider at the top and narrower at the bottom is provided at the upper end of the inner wall of the second connecting member.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The discharge port of the present invention forms an inclined first wall and a second wall on the circumferential side wall of the sandblasting gun barrel, the distance between the bottom of the first wall and the second wall is smaller than the distance between the top, and a third wall is provided in the sandblasting gun barrel to seal the front end of the sandblasting gun barrel so that the material entering the sandblasting gun barrel can be ejected from the discharge port, the lower end of the third wall is connected to the inner wall of the sandblasting gun barrel, and the upper end is connected to the second wall, and the third wall is inclined, and its inclination angle is the same as that of the second wall. The present invention sets the discharge port on the circumferential side wall of the sandblasting gun barrel, and forms the first wall and the second wall whose bottom distance is smaller than the top distance, and seals the front end of the sandblasting gun barrel by the third wall so that the material entering the sandblasting gun barrel is refracted and changed in direction after being blocked by the third wall, and then ejected from the discharge port, so that the ejected material is in a fan shape with a smaller angle as a whole, so that the density of the ejected material is greater. When sandblasting a workpiece by inner hole sandblasting, to spray the sand onto the inner wall surface of the workpiece, it is only necessary to insert the sandblasting gun head of the present invention into the inner wall of the workpiece, and by rotating the workpiece, the sandblasting gun can be sprayed at the designated position of the inner wall surface of the workpiece. Compared with the prior art, the sandblasting gun barrel of the present invention has a small spraying area and a high density, which can effectively ensure the consistency and uniformity of the sandblasting effect, greatly save the processing time of the workpiece, and is conducive to saving the production cost of the workpiece processing.

[0016] 2. The sandblasting gun head of this case also includes a plugging piece that is detachably arranged in the sandblasting gun barrel to seal the sandblasting gun barrel, and the third wall is formed on the plugging piece. In the sandblasting operation environment, the plugging piece is prone to wear and corrosion after long-term use. The detachable connection between the plugging piece and the sandblasting gun barrel facilitates the replacement of the plugging piece and reduces costs.

[0017] 3. The first connecting piece and the lock buckle are detachably connected, the lock buckle and the second connecting piece are detachably connected, and the second connecting piece and the sandblasting gun barrel are detachably connected. The detachable connection between the various components makes the sandblasting gun head of this case easy to disassemble and assemble, saving disassembly and assembly time. At the same time, the detachable connection between the various components also makes the replacement and maintenance of the sandblasting gun head of this case more convenient. When one of the components is damaged, it only needs to be removed and replaced in a targeted manner without replacing the entire sandblasting gun head, which effectively saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the overall structure explosion diagram of the sandblasting gun head in this case

[0019] Figure 2 This is the main view of the sandblasting gun head in this case

[0020] Figure 3 This case Figure 2 Section view in the AA direction.

[0021] Figure 4 This case Figure 2 Enlarged view of point B in the middle.

[0022] Figure 5 This case Figure 3 Enlarged view of point C in the middle.

[0023] Figure 6 This case Figure 3 Enlarged view of point D in the middle.

[0024] Figure 7 Schematic diagram of the locking connection component structure in this case. DETAILED DESCRIPTION

[0025] The following examples further illustrate the features of the present invention and other related features to facilitate understanding by those skilled in the art:

[0026] For the description of the position relationship of the components in this case, such as front, back, top, bottom, etc., please refer to Figure 1 and Figure 3 Directions shown in .

[0027] like Figures 1 to 7As shown, the present case discloses a sandblasting gun head, which specifically includes a first connecting member 1 for connecting to an external sandblasting machine, and a sandblasting gun barrel 2, one end of which is detachably connected to the first connecting member 1 through a locking connection assembly. The locking connection assembly enables a detachable connection between the first connecting member 1 and the sandblasting gun barrel 2, and at the same time, the locking connection assembly locks the first connecting member 1 and the sandblasting gun barrel 2 when connecting them, which can effectively ensure the stability of the connection between the two and the locking connection assembly. A discharge port 21 is provided at the other end of the sandblasting gun barrel 2. Specifically, the discharge port 21 forms an inclined first wall surface 211 and a second wall surface 212 on the circumferential side wall of the sandblasting gun barrel 2. As shown Figure 6 As shown, the distance D1 between the bottom of the first wall and the second wall is smaller than the distance D2 between the tops. That is to say, the discharge port 21 is provided on the circumferential side wall of the sandblasting gun barrel 2, rather than being provided in a manner that a straight tube is opened at both ends as in the prior art. In specific implementation, the discharge port 21 is formed from the two side edges of the notch on the circumferential side wall of the sandblasting gun barrel 2 starting from the outer surface of the spray gun head, gradually converging inward to form a convergent shape with the tip facing the inside of the spray gun. The shape of the discharge port 21 forms a "V"-shaped incision on the side wall composed of an inclined first wall 211 and a second wall 212. This V-shaped incision is cut from the outer surface of the sandblasting gun tube 2 to the inner surface, and is directly connected to the inner cavity of the sandblasting gun tube 2, which means that the internal space of the tube can be directly observed or contacted from the outside of the tube. In order to facilitate the sandblasting operation, the discharge port is set as far as possible at a position of the sandblasting gun barrel 2 that is farther away from the first connecting member 1 in the horizontal direction. Due to the special design of the discharge port 21, the material fluid in the sandblasting gun barrel 2 can be ejected in a specific mode from the internal flow channel of the sandblasting gun barrel 2 to the discharge port 21, forming the required injection pattern or flow type. This design not only optimizes the injection efficiency of the fluid, but also improves the uniformity, coverage and impact force of the injection to meet the needs of specific application scenarios. A third wall 31 is provided in the sandblasting gun barrel 2 to seal the front end of the sandblasting gun barrel 2 so that the material entering the sandblasting gun barrel 2 can be ejected from the discharge port 21. That is to say, compared with the sandblasting gun barrel 2 of the prior art, which is a straight tube with openings at both ends, the function of the third wall 31 is to block the end opening similar to that in the prior art, so that due to the blocking of the third wall 31, the material is refracted and changes direction and then ejected from the discharge port 21. The lower end of the third wall 31 is connected to the inner wall of the sandblasting gun barrel 2, and the upper end is connected to the second wall 212. That is to say, the third wall surface 31 actually completely seals the inner wall surface of the sandblasting gun barrel 2 to prevent the material from being sprayed out from other places except the discharge port 21. The third wall surface 31 is inclined, and its inclination angle is the same as that of the second wall surface 212. Figure 3As shown, the third wall 31 is tilted, that is, when the discharge port 21 is facing upward and the sandblasting gun barrel 2 is placed flat, the third wall 31 is tilted, and the first wall 211 and the second wall 212 of the discharge port 21 are matched, so that the material can be sprayed out at the same position, and the sand can be sprayed at the same angle. By rotating the workpiece, the designated position on the inner wall surface of the workpiece can be sprayed. Compared with the prior art, the sandblasting gun head of this case has a smaller spraying area, a larger amount of sand, and a shorter processing time for the workpiece, which improves the sandblasting efficiency.

[0028] Furthermore, if Figure 3 As shown, in the specific implementation, the inclination angle of the second wall 212 and the third wall 31 is 15°-75°. The inclination angle of the second wall 212 and the third wall 31 is 15°-75°. Figure 3 In the orientation shown, the angles of the second wall 212 and the third wall 31 relative to the X-axis. When testing the discharge port 21 of the sandblasting barrel 2 of this case, preferably, the inclination angles of the second wall 212 and the third wall 31 are set to between 20° and 50° to produce the best effect.

[0029] like Figure 1-Figure 4 As shown, the sandblasting gun head of the present case also includes a plugging member 3, and a third wall surface 31 is formed on the plugging member 3. That is to say, the front end of the sandblasting gun barrel 2 can be integrally formed and closed, and in this case, the third wall surface 31 is integrally formed with the sandblasting gun barrel 2. It can also be open at both ends as in the prior art, and then the outlet end is sealed by the plugging member 3 to allow the material to be ejected from the discharge port 21. Because the plugging member 3 is prone to wear and corrosion after long-term use in the sandblasting environment, the detachable connection between the plugging member 3 and the sandblasting gun barrel 2 facilitates the replacement of the plugging member 3 and reduces costs. In specific implementation, the plugging member 3 can be connected and fixed by bolts or snaps, and can also be matched with a concave-convex fitting structure to achieve a detachable connection with the sandblasting gun barrel 2.

[0030] In specific implementation, the plugging member 3 is made of tungsten steel material. Tungsten steel material has high hardness and corrosion resistance as well as wear resistance and thermal stability. The sandblasting environment is generally harsh, and the high hardness of tungsten steel material can withstand the high-speed impact of high-pressure airflow and abrasive particles without being easily worn or deformed. The good corrosion resistance of tungsten steel material makes the sandblasting gun barrel less susceptible to chemical erosion when using various types of abrasives. Compared with other materials, the excellent wear resistance of tungsten steel material has a longer lifespan, reducing the replacement frequency and maintenance cost.

[0031] like Figure 1 , Figure 3 , Figure 5-Figure 7As shown, the locking connection assembly of this case includes a lock buckle 4 and a second connection member 5 detachably connected to the lower end of the lock buckle 4, the upper end of the lock buckle 4 is detachably connected to the lower end of the first connection member 1, and the lower end of the second connection member 5 is detachably connected to the upper end of the sandblasting gun barrel 2. The lock buckle 4 connects the first connection member 1 and the second connection member 5 thereon, and then the second connection member 5 connects the sandblasting gun barrel 2 to its lower end. The connection between the components is stable, easy to disassemble and assemble, and the replacement and maintenance costs are reduced. The first connection member 1 and the second connection member 5 are locked by the lock buckle 4, which further improves the stability of the connection between the three and is not easy to loosen.

[0032] Specifically, Figure 1 , Figure 3 , Figure 5-Figure 7 As shown, a first internal thread 41 is provided on the inner wall of the upper end of the lock buckle 4, and a first external thread 11 for threaded connection with the first internal thread 41 is provided on the outer wall of the lower end of the first connecting member 1. Preferably, the detachable connection between the lock buckle 4 and the first connection 1 is a threaded connection, which is convenient for disassembly and assembly, does not require other parts to be fixed, and has good stability. An annular flange 51 is provided on the outer wall of the second connecting member 5, and an annular groove 42 for the annular flange 51 to be inserted is provided on the inner wall of the lower end of the lock buckle 4. In specific implementation, the annular flange 51 is an annular ring extending outward along the outer peripheral side wall of the second connecting member 5, which is integrally formed with the second connecting member 5. The annular groove 42 is an annular groove opened along the inner peripheral side wall of the lock buckle 4 toward the outer wall, which is integrally formed with the lock buckle 4. The structure of the annular flange 51 and the annular groove 42 of this structure in this case can achieve precise connection and ensure the accurate positional relationship between the second connecting member 5 and the lock buckle 4. At the same time, it can provide additional structural support, increase the strength and rigidity of the connection area, prevent deformation of the connection or damage to the tight seal, and prevent material leakage. The second connecting member 5 is provided with a second internal thread 52 on the inner wall of the lower end, and the sandblasting gun barrel 2 is provided with a second external thread 22 for threaded connection with the first internal thread 41 on the outer wall of the upper end. Preferably, the detachable connection between the second connecting member 5 and the sandblasting gun barrel 2 is a threaded connection, which is convenient for disassembly and assembly, does not require other parts to be fixed, has a simple structure and good stability.

[0033] like Figure 3 , Figure 5 As shown, the upper end of the inner wall of the second connecting member 5 is provided with an inverted conical channel 53 that is wide at the top and narrow at the bottom. In this case, the "Venturi effect" is achieved by setting the channel 53 in the second connecting member 5. This is a well-known technology in the art and a fluid mechanics phenomenon that describes the phenomenon that when a fluid (liquid or gas) passes through a contracting pipe or channel, the flow rate increases and the static pressure decreases. The structure of this channel in this case can effectively reduce consumption and achieve energy-saving effects, while effectively improving the sandblasting efficiency.

[0034] As mentioned above, this case protects a sandblasting gun head, and all technical solutions that are the same or similar to this case should be shown to fall within the scope of protection of this case.

Claims

1. A sandblasting gun head, comprising a first connecting member (1) for connecting to an external sandblasting machine, a sandblasting gun barrel (2) one end of which is detachably connected to the first connecting member (1) through a locking connection assembly, and the other end of the sandblasting gun barrel (2) is provided with a discharge port (21), characterized in that: The discharge port (21) forms an inclined first wall surface (211) and a second wall surface (212) on the circumferential side wall of the sandblasting gun barrel (2); the distance D1 between the bottom of the first wall surface (211) and the second wall surface (212) is smaller than the distance D2 between the tops; a third wall surface (31) is provided in the sandblasting gun barrel (2) to seal the front end of the sandblasting gun barrel (2) so that the material entering the sandblasting gun barrel (2) is ejected from the discharge port (21); the lower end of the third wall surface (31) is connected to the inner wall of the sandblasting gun barrel (2) and the upper end is connected to the second wall surface (212); the third wall surface (31) is inclined and its inclination angle is the same as that of the second wall surface (212).

2. A sandblasting gun head according to claim 1, characterized in that: The inclination angles of the second wall surface (212) and the third wall surface (31) are 15°-75°.

3. A sandblasting gun head according to claim 1, characterized in that: It also comprises a sealing member (3) which is detachably arranged in the sandblasting gun barrel (2) and seals the sandblasting gun barrel (2), and the third wall surface (31) is formed on the sealing member (3).

4. A sandblasting gun head according to claim 3, characterized in that: The blocking piece (3) is made of tungsten steel material.

5. A sandblasting gun head according to any one of claims 1 to 4, characterized in that: The locking connection assembly comprises a lock buckle (4) and a second connection member (5) detachably connected to the lower end of the lock buckle (4); the upper end of the lock buckle (4) is detachably connected to the lower end of the first connection member (1); and the lower end of the second connection member (5) is detachably connected to the upper end of the sandblasting gun barrel (2).

6. A sandblasting gun head according to claim 5, characterized in that: The lock buckle (4) has a first internal thread (41) on its upper inner wall, the first connecting member (1) has a first external thread (11) on its lower outer wall for threaded connection with the first internal thread (41), the second connecting member (5) has an annular flange (51) on its outer wall, the lock buckle (4) has an annular groove (42) on its lower inner wall for the annular flange (51) to be snapped into, the second connecting member (5) has a second internal thread (52) on its lower inner wall, and the sandblasting gun barrel (2) has a second external thread (22) on its upper outer wall for threaded connection with the first internal thread (41).

7. A sandblasting gun head according to claim 5, characterized in that: An inverted conical channel (53) that is wider at the top and narrower at the bottom is provided at the upper end of the inner wall of the second connecting member (5).

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