Sand blasting gun connector and method for connecting sand blasting gun body and sand blasting hose

Abstract

The invention relates to the technical field of rust removal equipment, in particular to a sand blasting gun connector and a connecting method of a sand blasting gun body and a sand blasting hose, and the sand blasting gun connector comprises a connector body, an inner connector, a clamping sleeve and a locking nut. And the sand-blasting gun main body part is positioned in the joint body. The inner connector is located in the connector body and provided with a first fixing part and a second fixing part, the first fixing part abuts against the sand blasting gun body, the second fixing part is connected with the first fixing part, the second fixing part extends in the direction away from the sand blasting gun body, and a containing space is formed between the second fixing part and the connector body. Part of the sand blasting hose is placed in the containing space, and the clamping sleeve is arranged on the circumferential outer side of the sand blasting hose in a sleeving mode and abuts against the connector body. And the locking nut sleeves the circumferential outer side of the clamping sleeve. According to the technical scheme, the problems that in the prior art, connection between the sand blasting gun body and the sand blasting hose is unstable, and the sealing performance is poor are effectively solved.

Description

Technical Field

[0001] This application relates to the technical field of rust removal equipment, and more specifically, to a sandblasting gun connector and a method for connecting the sandblasting gun body and the sandblasting hose. Background Technology

[0002] In the production process, sandblasting is frequently used to remove rust or contaminated coatings from material surfaces. Sandblasting involves using a sandblasting gun, whose feed channel and blasting hose are connected via screws or clamps. Both of these connection methods are prone to air leakage at the connection points. After a period of use, compressed air cavitation occurs at the screws or the clamps. Furthermore, before clamping, the feed channel and blasting hose are inserted into each other; the gap between them can loosen due to cavitation, preventing effective sandblasting.

[0003] Some existing sandblasting guns connect the delivery channel and the hose using a connector (e.g., patent number CN 221374880 U, titled "A Connector for a Cutting Gun Hose"). This connector includes a connector body and a sleeve. The connector body has a nut for connecting to the gas connector of the cutting gun. The end of the connector body away from the nut extends into the gas hose. The sleeve is fitted onto the end of the gas hose on the side of the connector body that extends into the hose, and the connector body, sleeve, and gas hose are fixed together by hydraulic clamping. A retaining ring is provided circumferentially on the outer surface of the connector body away from the nut. A positioning ring is provided on the end face of the sleeve near the retaining ring for abutting against the retaining ring. A sealing ring is provided on the end face of the nut near the cutting gun. The inner wall of the sealing ring has an arc-shaped groove circumferentially formed, and a rubber ring for sealing the gas connector of the cutting gun is provided in the arc-shaped groove. However, this connector, which connects the gas hose by fitting it onto the end of the connector body, is prone to instability after prolonged use, affecting the sealing performance. Summary of the Invention

[0004] This application provides a sandblasting gun connector and a method for connecting the sandblasting gun body and the sandblasting hose, in order to solve the problems of unstable connection and poor sealing between the sandblasting gun body and the sandblasting hose in the prior art.

[0005] A sandblasting gun connector according to this application includes: a connector body, an inner connector, a ferrule, and a locking nut. The main body of the sandblasting gun is located within the connector body. The inner connector is located within the connector body and has a first fixing part and a second fixing part. The first fixing part abuts against the main body of the sandblasting gun, and the second fixing part is connected to the first fixing part and extends in a direction away from the main body of the sandblasting gun. There is a placement space between the second fixing part and the connector body, and a portion of the sandblasting hose is placed within the placement space. The ferrule is fitted around the circumferential outer side of the sandblasting hose and abuts against the connector body. The locking nut is fitted around the circumferential outer side of the ferrule.

[0006] In some embodiments, the sleeve has a plurality of first grooves spaced apart along the inner side of the circumference, and the sleeve has a plurality of second grooves in a direction parallel to the axis.

[0007] In some embodiments, the second fixing part has a first straight section and a first inclined section, the first inclined section and the first straight section are connected, the first inclined section gradually approaches the sandblasting hose in a direction away from the sandblasting gun body, and the angle between the first inclined section and the horizontal plane is between 25° and 45°.

[0008] In some embodiments, a plurality of third grooves are provided at intervals on the circumferential outer side of a portion of the first straight cylindrical section and on the circumferential outer side of the first inclined cylindrical section.

[0009] In some embodiments, the connector body has a first mounting portion and a second mounting portion, both of which have internal threads. The sandblasting gun body and the first fixing portion are threadedly connected to the first mounting portion, and the sandblasting hose is threadedly connected to both the first mounting portion and the second mounting portion.

[0010] In some embodiments, the outer diameter of the second mounting part is smaller than the outer diameter of the first mounting part, the second mounting part has an external thread, the locking nut has a second straight section, the second straight section has an internal thread, and the second straight section and the second mounting part are threaded together.

[0011] In some embodiments, the locking nut further has a second inclined section connected to a second straight section. The second inclined section gradually approaches the sandblasting hose in a direction away from the second mounting portion, and the angle between the second inclined section and the horizontal plane is between 5° and 30°.

[0012] In some embodiments, the ferrule gradually approaches the sandblasting hose in a direction away from the second mounting portion, and the outer wall of the ferrule fits into the inner wall of the second inclined section.

[0013] In some embodiments, the sandblasting gun body has a conveying channel, the inner diameter of the first fixing part is equal to the inner diameter of the conveying channel, and the inner diameter of the second fixing part is greater than the inner diameter of the first fixing part.

[0014] This application also provides a method for connecting the sandblasting gun body and the sandblasting hose, wherein the sandblasting gun body and the sandblasting hose are connected through a sandblasting gun connector, and the method for connecting the sandblasting gun body and the sandblasting hose includes the following steps: Step S1: Screw the inner connector into the connector body. The first fixing part and one end of the connector body are spaced apart, and the second fixing part extends out of the other end of the connector body. Step S2: Screw the sandblasting gun body into the connector body and abut it against the first fixing part; Step S3: Screw the sandblasting hose into the placement space, with the sandblasting hose abutting against both the first fixing part and the second fixing part; Step S4: Place the ferrule around the circumferential outside of the sandblasting hose; Step S5: Place the locking nut on the outer circumferential side of the ferrule and screw it into the connector body.

[0015] The sandblasting gun connector, using the technical solution of this application, includes: a connector body, an inner connector, a ferrule, and a locking nut. The main body of the sandblasting gun is located within the connector body. The inner connector is located within the connector body and has a first fixing part and a second fixing part. The first fixing part abuts against the main body of the sandblasting gun, achieving connection and sealing between the two, and further improving the sealing performance through the connector body. The second fixing part is connected to the first fixing part and extends in a direction away from the main body of the sandblasting gun. There is a placement space between the second fixing part and the connector body, and part of the sandblasting hose is placed in the placement space. At this time, the installation of the sandblasting hose is not only more secure, but the second fixing part and the connector body can also provide a good sealing effect for the sandblasting hose. The ferrule is sleeved on the circumferential outer side of the sandblasting hose and abuts against the connector body, providing a sealing effect on one side of the sandblasting hose. The locking nut is sleeved on the circumferential outer side of the ferrule, achieving a tight connection between the ferrule and the sandblasting hose, ensuring sealing strength. The technical solution of this application effectively solves the problems of unstable connection and poor sealing performance between the sandblasting gun body and the sandblasting hose in the prior art. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of the sandblasting gun connector according to an embodiment of this application is shown; Figure 2 It shows Figure 1 A magnified schematic diagram of the local structure at point A; Figure 3 A schematic diagram of the mating of the connector body and the inner connector according to an embodiment of this application is shown; Figure 4 A schematic diagram of the card sleeve according to an embodiment of this application is shown.

[0019] The above figures include the following reference numerals: 10. Connector body; 11. First mounting part; 12. Second mounting part; 20. Inner connector; 21. First fixing part; 22. Second fixing part; 221. First straight section; 222. First inclined section; 223. Third groove; 23. Placement space; 30. Sleeve; 31. First groove; 32. Second groove; 40. Locking nut; 41. Second straight section; 42. Second inclined section; 100. Sandblasting gun body; 200. Sandblasting hose. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0022] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0023] like Figures 1 to 3As shown, a sandblasting gun connector according to this embodiment includes: a connector body 10, an inner connector 20, a retaining sleeve 30, and a locking nut 40. A portion of the sandblasting gun body 100 is located within the connector body 10. The inner connector 20 is located within the connector body 10 and has a first fixing part 21 and a second fixing part 22. The first fixing part 21 abuts against the sandblasting gun body 100, and the second fixing part 22 is connected to the first fixing part 21. The second fixing part 22 extends in a direction away from the sandblasting gun body 100, and a placement space 23 is provided between the second fixing part 22 and the connector body 10. A portion of the sandblasting hose 200 is placed within the placement space 23. The retaining sleeve 30 is fitted around the circumferential outer side of the sandblasting hose 200 and abuts against the connector body 10. The locking nut 40 is fitted around the circumferential outer side of the retaining sleeve 30.

[0024] Using the technical solution of this embodiment, the sandblasting gun connector includes: a connector body 10, an inner connector 20, a retaining sleeve 30, and a locking nut 40. The main body of the sandblasting gun is located inside the connector body 10. The inner connector 20 is located inside the connector body 10 and has a first fixing part 21 and a second fixing part 22. The first fixing part 21 abuts against the main body of the sandblasting gun 100 to achieve connection and sealing between the two, and the sealing performance is further improved by the connector body 10. The second fixing part 22 is connected to the first fixing part 21 and extends in a direction away from the main body of the sandblasting gun 100. There is a placement space 23 between the second fixing part 22 and the connector body 10. Part of the sandblasting hose 200 is placed in the placement space. At this time, the installation of the sandblasting hose 200 is not only more secure, but the second fixing part 22 and the connector body 10 can also play a good sealing role for the sandblasting hose 200. The ferrule 30 is fitted around the circumferential outer side of the sandblasting hose 200 and abuts against the connector body 10, providing a seal on one side of the sandblasting hose 200. A locking nut 40 is fitted around the circumferential outer side of the ferrule 30, ensuring a tight connection between the ferrule 30 and the sandblasting hose 200 and guaranteeing sealing strength. The technical solution of this embodiment effectively solves the problems of unstable connection and poor sealing between the sandblasting gun body 100 and the sandblasting hose 200 in the prior art.

[0025] It should be noted that the abrasive is pressurized inside the pressure tank and mixes with compressed air at the tank outlet, forming a high-speed gas-solid two-phase flow, which flows into the sandblasting gun body 100 through the sandblasting hose 200. The sandblasting hose 200 and the sandblasting gun body 100 are connected via a sandblasting gun connector. Furthermore, the sandblasting gun includes the sandblasting gun body, trigger valve, nozzle seat assembly, nozzle, and protective sleeve. The sandblasting gun body has a delivery channel for conveying the mixture of abrasive and compressed air. The trigger valve controls the opening and closing of the delivery channel. Finally, the mixture of abrasive and compressed air is ejected through the nozzle, and the protective sleeve protects the nozzle. The specific structure of the sandblasting gun is existing technology and will not be described in detail here.

[0026] It should also be noted that the sandblasting hose 200 is a specialized sandblasting hose, achieving its goals of wear resistance, pressure resistance, flexibility, and safety through a multi-layered composite structure. The sandblasting hose 200 has an inner lining layer, also known as a wear-resistant layer, with a smooth surface to reduce frictional resistance; this layer is made of polyurethane. The sandblasting hose 200 also has a middle layer, also known as a reinforcing layer, which withstands internal high pressure and prevents expansion and bursting; this layer is made of braided steel wire. The sandblasting hose 200 also has an outer covering layer that protects the middle layer from external physical damage; this layer is made of wear-resistant rubber.

[0027] like Figure 2 and Figure 4 As shown, in some embodiments, the sleeve 30 is provided with a plurality of first grooves 31 spaced apart along the inner side of the circumference. The first grooves can not only improve the roughness of the contact surface between the sleeve 30 and the sandblasting hose 200, but also provide space for deformation under the compression of the locking nut 40, and further improve the sealing of the sleeve and the sandblasting hose 200 to prevent abrasive and compressed gas.

[0028] like Figure 4 As shown, in some embodiments, the ferrule 30 has a plurality of second grooves 32 along a direction parallel to the axis. Under the compression of the locking nut 40, the second grooves provide space for the deformation of the ferrule 30. As the ferrule 30 deforms, the connection between the ferrule 30 and the sandblasting hose 200 becomes tighter, and the contact surface becomes uneven, thus resulting in a better sealing effect.

[0029] like Figure 1 and Figure 3 As shown, in some embodiments, the interiors of the first fixing part 21 and the second fixing part 22 are connected to the delivery channel of the sandblasting gun body 100 and the sandblasting hose 200, forming a complete passage for the flow of abrasive and compressed gas. The second fixing part 22 has a first straight cylindrical section 221 and a first inclined cylindrical section 222, which are connected to the first straight cylindrical section 221. The first inclined cylindrical section 222 gradually approaches the sandblasting hose 200 in a direction away from the sandblasting gun body 100. This design of the first inclined cylindrical section 222 prevents excessive fluctuations in the abrasive due to changes in diameter during inflow, resulting in a smoother flow. The angle between the first inclined cylindrical section 222 and the horizontal plane is between 25° and 45°. This design causes the first inclined cylindrical section 222 to form a funnel shape, which can better receive the abrasive from the sandblasting hose 200. When the angle between the first inclined section 222 and the horizontal plane is less than 25°, the diameter difference between the first inclined section 222 and the first straight section 221 is too small, making it impossible to effectively stabilize the abrasive. When the angle between the first inclined section 222 and the horizontal plane is greater than 45°, the diameter difference between the first inclined section 222 and the first straight section 221 is too large. Due to the large change in diameter during the flow of the abrasive, the flow velocity will increase instantaneously, thereby increasing the impact on the inner joint 20. In this embodiment, the angle between the first inclined section 222 and the horizontal plane is 30°.

[0030] like Figure 3 As shown, in some embodiments, a plurality of third grooves 223 are provided at intervals on the outer circumferential direction of the first straight cylindrical section 221 and the outer circumferential direction of the first inclined cylindrical section 222. The third grooves 223 can enhance the roughness of the contact surface between the second fixing part 22 and the sandblasting hose 200, and improve the connection strength. At the same time, the third grooves 223 are provided at the communication position between the second fixing part 22 and the sandblasting hose 200, which can further improve the sealing performance compared with a smooth surface, and prevent abrasive or compressed gas from entering the gap between the second fixing part 22 and the sandblasting hose 200.

[0031] like Figure 1 and Figure 3 As shown, in some embodiments, the connector body 10 has a first mounting portion 11 and a second mounting portion 12, both of which have internal threads. The sandblasting gun body 100 and the first fixing portion 21 are both threadedly connected to the first mounting portion 11, and the sandblasting hose 200 is threadedly connected to both the first mounting portion 11 and the second mounting portion 12. The connection between the sandblasting gun body 100, the sandblasting gun connector, and the sandblasting hose 200 is achieved through threaded connections.

[0032] like Figure 2 and Figure 3 As shown, in some embodiments, the outer diameter of the second mounting portion 12 is smaller than the outer diameter of the first mounting portion 11. This design is to achieve abutment between the second straight section 41 and the first mounting portion 11, and the abutment position of the second straight section 41 and the first mounting portion 11 is staggered from the abutment position of the ferrule 30 and the second mounting portion 12, which can further improve the sealing performance. The second mounting portion 12 has external threads, and the locking nut 40 has a second straight section 41 with internal threads. The second straight section 41 and the second mounting portion 12 are threadedly connected. At this time, the locking nut 40 can achieve a stable connection with the connector body 10, and at the same time, the locking nut 40 can provide compressive force to the ferrule 30.

[0033] like Figure 2As shown, in some embodiments, the locking nut 40 also has a second inclined cylindrical section 42, which is connected to the second straight cylindrical section 41. The second inclined cylindrical section 42 gradually approaches the sandblasting hose 200 in a direction away from the second mounting portion 12. At this time, the internal curved surface of the second inclined cylindrical section 42 is inclined. As the connection between the locking nut 40 and the connector body 10 gradually tightens, the force exerted by the locking nut 40 on the ferrule 30 also increases. Under the action of the compressive force, the ferrule 30 can only deform to the left. This improves the sealing performance of the connection position between the ferrule 30 and the sandblasting hose 200, as well as the connection position between the ferrule 30 and the connector body 10, preventing external gas from entering. The angle between the second inclined cylindrical section 42 and the horizontal plane is between 5° and 30°. Within this range, the second inclined cylindrical section 42 can apply a uniform and effective clamping force to the ferrule 30. When the angle between the second inclined cylinder section 42 and the horizontal plane is less than 5°, the second inclined cylinder section 42 cannot effectively limit the ferrule 30. As the locking nut 40 is tightened, the ferrule 30 easily moves to the right and disengages from the second inclined cylinder section 42. When the angle between the second inclined cylinder section 42 and the horizontal plane is greater than 30°, in order to ensure that the screw connection between the second straight cylinder section 41 and the second mounting part 12 is not affected, the second straight cylinder section 41 and the second inclined cylinder section 42 need to be thickened. This not only increases the cost, but also creates a height difference between the second straight cylinder section 41 and the first mounting part 11, which can easily affect the installation strength of the locking nut 40 under the influence of external airflow.

[0034] like Figure 2 As shown, in some embodiments, the ferrule 30 gradually approaches the sandblasting hose 200 in a direction away from the second mounting portion 12, and the outer wall of the ferrule 30 fits against the inner wall of the second inclined section 42. This arrangement not only ensures that the ferrule 30 and the second inclined section 42 fit tightly, but also ensures that the ferrule 30 will not come out of the locking nut 40 under the action of extrusion force.

[0035] like Figure 1 and Figure 3 As shown, in some embodiments, the sandblasting gun body 100 has a conveying channel, the inner diameter of the first fixing part 21 is equal to the inner diameter of the conveying channel, and the inner diameter of the second fixing part 22 is larger than the inner diameter of the first fixing part 21. This arrangement is to pre-increase the flow rate of the abrasive and compressed air when they are ejected from the nozzle of the sandblasting gun, thereby ultimately increasing the impact force of the abrasive on the workpiece. In addition, this design also allows the abrasive and compressed air to interact more intensely, mix more evenly, and the compressed air to better envelop the abrasive, thus reducing wear on the nozzle.

[0036] This embodiment also relates to a method for connecting the sandblasting gun body 100 and the sandblasting hose 200. The sandblasting gun body 100 and the sandblasting hose 200 are connected through a sandblasting gun connector. The method for connecting the sandblasting gun body and the sandblasting hose includes the following steps: In step S1, the inner connector 20 is screwed into the connector body 10. The first fixing part 21 and one end of the connector body 10 are spaced apart to allow for the installation of the sandblasting gun body 100. The second fixing part 22 extends from the other end of the connector body 10, allowing it to be better inserted into the sandblasting hose 200, thus placing the sandblasting hose 200 into the placement space 23. At this time, the first fixing part 21 seals the end face of the sandblasting hose 200, while the second fixing part 22, inserted into the sandblasting hose 200, prevents abrasive from overflowing between the sandblasting hose 200 and the inner connector 20, significantly improving the sealing performance.

[0037] In step S2, the sandblasting gun body 100 is screwed into the connector body 10 and abuts against the first fixing part 21. At this time, the sandblasting gun body 100 and the first fixing part 21 form a seal. In addition, the inner diameter of the conveying channel of the sandblasting gun body 100 is equal to the inner diameter of the first fixing part 21, and both are smaller than the inner diameter of the second fixing part 22. At this time, the change in diameter causes a change in abrasive flow rate, and the resulting impact force is borne by the first fixing part 21. Therefore, the connection between the sandblasting gun body 100 and the connector body 10 is not affected. Furthermore, the inner wall of the connector body 10 and the side wall of the first fixing part 21 form a direct connection and are both in close contact with the sandblasting gun body 100, achieving further sealing. In step S3, the sandblasting hose 200 is screwed into the placement space 23. The sandblasting hose 200 abuts against the first fixing part 21 and the second fixing part 22. The contact area between the connector body 10 and the second fixing part 22 and the sandblasting hose 200 is increased. If the abrasive wants to overflow, it needs to pass through the abutment gap between the sandblasting hose 200 and the second fixing part 22, then through the abutment gap between the sandblasting hose 200 and the first fixing part 21, and finally through the abutment gap between the sandblasting hose 200 and the connector body 10. Therefore, it is difficult for the abrasive to overflow, and the sealing effect is good.

[0038] In step S4, the ferrule 30 is fitted onto the circumferential outer side of the sandblasting hose 200. The ferrule 30 can provide a good seal to the end of the second mounting part 12, further improving the sealing accuracy.

[0039] In step S5, the locking nut 40 is fitted onto the outer circumferential side of the sleeve 30 and screwed onto the connector body 10. The locking nut 40 fixes the sleeve 30 and provides a clamping force to the sleeve 30. The sleeve 30 deforms under the force, thereby improving the sealing performance at the connection between the second mounting part 12 and the sandblasting hose 200.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0042] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sandblasting gun connector, characterized in that, include: The connector body (10) and the main body (100) of the sandblasting gun are located inside the connector body (10); An inner connector (20) is located inside the connector body (10). The inner connector (20) has a first fixing part (21) and a second fixing part (22). The first fixing part (21) abuts against the sandblasting gun body (100). The second fixing part (22) is connected to the first fixing part (21). The second fixing part (22) extends in a direction away from the sandblasting gun body (100). There is a placement space (23) between the second fixing part (22) and the connector body (10). A portion of the sandblasting hose (200) is placed in the placement space (23). A ferrule (30) is fitted around the circumferential outside of the sandblasting hose (200) and abuts against the connector body (10); Locking nut (40), which is sleeved on the circumferential outer side of the sleeve (30).

2. The sandblasting gun connector according to claim 1, characterized in that, The sleeve (30) has a plurality of first grooves (31) spaced apart along the inner side of the circumference, and the sleeve (30) has a plurality of second grooves (32) in a direction parallel to the axis.

3. The sandblasting gun connector according to claim 1, characterized in that, The second fixing part (22) has a first straight cylindrical section (221) and a first inclined cylindrical section (222), the first inclined cylindrical section (222) and the first straight cylindrical section (221) are connected, the first inclined cylindrical section (222) gradually approaches the sandblasting hose (200) in a direction away from the sandblasting gun body (100), and the angle between the first inclined cylindrical section (222) and the horizontal plane is between 25° and 45°.

4. The sandblasting gun connector according to claim 3, characterized in that, A plurality of third grooves (223) are provided at intervals on the outer circumferential direction of the first straight section (221) and the outer circumferential direction of the first inclined section (222).

5. The sandblasting gun connector according to claim 1, characterized in that, The connector body (10) has a first mounting part (11) and a second mounting part (12). Both the first mounting part (11) and the second mounting part (12) have internal threads. The sandblasting gun body (100) and the first fixing part (21) are threadedly connected to the first mounting part (11). The sandblasting hose (200) is threadedly connected to the first mounting part (11) and the second mounting part (12).

6. The sandblasting gun connector according to claim 5, characterized in that, The outer diameter of the second mounting part (12) is smaller than that of the first mounting part (11). The second mounting part (12) has an external thread. The locking nut (40) has a second straight section (41). The second straight section (41) has an internal thread. The second straight section (41) and the second mounting part (12) are threaded together.

7. The sandblasting gun connector according to claim 6, characterized in that, The locking nut (40) also has a second inclined section (42) connected to the second straight section (41). The second inclined section (42) gradually approaches the sandblasting hose (200) in a direction away from the second mounting part (12). The angle between the second inclined section (42) and the horizontal plane is between 5° and 30°.

8. The sandblasting gun connector according to claim 7, characterized in that, The sleeve (30) gradually approaches the sandblasting hose (200) in a direction away from the second mounting part (12), and the outer wall of the sleeve (30) and the inner wall of the second inclined cylinder section (42) are in contact.

9. The sandblasting gun connector according to claim 1, characterized in that, The sandblasting gun body (100) has a conveying channel, the inner diameter of the first fixing part (21) is equal to the inner diameter of the conveying channel, and the inner diameter of the second fixing part (22) is greater than the inner diameter of the first fixing part (21).

10. A method for connecting a sandblasting gun body and a sandblasting hose, characterized in that, The sandblasting gun body (100) and the sandblasting hose (200) are connected by a sandblasting gun connector, wherein the sandblasting gun connector is any one of claims 1 to 9, and the connection method between the sandblasting gun body and the sandblasting hose includes the following steps: Step S1: Screw the inner connector (20) into the connector body (10). The first fixing part (21) and one end of the connector body (10) are spaced apart, and the second fixing part (22) extends out of the other end of the connector body (10). Step S2: Screw the sandblasting gun body (100) into the connector body (10) and abut against the first fixing part (21); Step S3: Screw the sandblasting hose (200) into the placement space (23), and the sandblasting hose (200) abuts against the first fixing part (21) and the second fixing part (22); Step S4: Place the sleeve (30) around the circumferential outer side of the sandblasting hose (200); Step S5: The locking nut (40) is fitted onto the outer circumferential side of the sleeve (30) and screwed onto the connector body (10).

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