High-pressure pipe connecting assembly used for spraying machine and capable of being manually installed

Abstract

The invention relates to the technical field of spraying machine matching pipe fitting connection, and discloses a manually-installable high-pressure pipe connecting assembly for a spraying machine, which comprises a high-pressure pipe body, two connecting assemblies, a high-pressure gun and a spraying machine body, the two connecting assemblies sleeve the two ends of the high-pressure pipe body, each connecting assembly comprises a tightening knob, and the high-pressure gun sleeves the high-pressure pipe body. And the outer surface of the tightening knob is fixedly connected with adjusting teeth which are uniformly distributed. According to the high-pressure pipe, the holding friction force is improved through the adjusting tooth structure on the outer wall of the tightening knob, screwing can be completed by hands, tools such as a wrench are not needed, rapid disassembly and assembly of the high-pressure pipe, the spraying machine body and the high-pressure gun are achieved, the installation process is simplified, the tool and accessory cost is reduced, and the construction efficiency is improved; stable multiple sealing is formed at the joint, leakage of a high-pressure medium is effectively blocked, liquid leakage and pressure relief are avoided, the sealing performance and the operation safety are improved, and continuous and stable spraying construction is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of pipe connection technology for spray painting machines, specifically a high-pressure pipe connection assembly for spray painting machines that can be manually installed. Background Technology

[0002] As the core equipment for coating construction, the reliable connection between the high-pressure delivery pipeline and the main unit and spray gun of the spraying machine directly determines the sealing performance, operational safety, and on-site construction efficiency of the spraying operation. If the high-pressure pipeline joints are not securely connected or poorly sealed, problems such as leakage and loosening are likely to occur, which not only affects the construction quality but also poses safety hazards and reduces the overall work efficiency.

[0003] Traditionally, the connection between the high-pressure hose and the high-pressure gun and sprayer is made using an old structure with two wrenches at both ends. Because it involves two metal parts with tapered contact, tightening with a wrench can lead to leakage if the torque is insufficient. In addition, the connector on the gun body is a 360-degree rotating connector, which can loosen. Therefore, at least two wrenches are required for operation, which increases the cost of accessories and makes the operation cumbersome. Summary of the Invention

[0004] The purpose of this invention is to provide a high-pressure pipe connection assembly for a spraying machine that can be manually installed, solving the problems of traditional spraying machine high-pressure pipe connections requiring tools such as wrenches, cumbersome disassembly and assembly, high cost of accessories and tools, and low construction efficiency.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a manually installable high-pressure hose connection assembly for a spraying machine, comprising a high-pressure hose body, two connection assemblies, a high-pressure gun, and a spraying machine body. The two connection assemblies are sleeved on both ends of the high-pressure hose body. Each connection assembly includes a tightening knob, the outer surface of which is fixedly connected with evenly distributed adjusting teeth. The outer surface of the high-pressure hose body has two sealing grooves, each containing a sealing element. The inner walls of the two tightening knobs are provided with internal threads. The connection end of the high-pressure gun is provided with a first external thread adapted to the internal thread, and the output end of the spraying machine body is provided with a second external thread adapted to the internal thread.

[0006] Furthermore, the connection end of the high-pressure gun is detachably and sealed to one end of the high-pressure pipe body via a connection assembly.

[0007] Furthermore, the output end of the spraying machine body is detachably and sealed to the other end of the high-pressure pipe body via a connecting assembly.

[0008] Furthermore, the sealing element is an O-ring.

[0009] Furthermore, the seal is made of wear-resistant rubber.

[0010] Furthermore, the connection end of the high-pressure pipe body is provided with a limiting step.

[0011] Furthermore, two extended handles are fixedly connected to the outer surface of the tightening knob, a spring washer is fixedly connected to the bottom surface of the tightening knob, and a shock-absorbing rubber bushing is fixedly connected to the connection between the connecting assembly and the high-pressure pipe body.

[0012] The present invention has the following beneficial effects: (1) The present invention increases the friction force when the hand holds and turns the knob by adjusting the tooth structure on the outer wall of the knob, so that the turning operation can be completed directly by hand without the need for auxiliary tools such as wrenches. This enables the rapid disassembly and assembly of the high pressure pipe and the spraying machine body and high pressure gun, effectively simplifying the on-site installation and disassembly process, reducing the consumption of accessories and tool costs, and significantly improving the construction efficiency and on-site convenience of the spraying operation.

[0013] (2) The present invention uses the sealing groove on the high pressure pipe body and the wear-resistant rubber O-ring to cooperate with each other. After tightening the knob and the corresponding external thread to complete the connection, a stable and reliable multi-seal structure is formed inside the joint. This effectively prevents the high pressure medium from leaking outward along the connection gap, fundamentally eliminating the common leakage and pressure relief problems in spraying operations, significantly improving the sealing performance of the pipeline connection, reducing the safety risks caused by medium leakage, ensuring the stability and reliability of the spraying construction process, and improving the overall operation safety and continuous working capacity.

[0014] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the high-pressure pipe body in this invention; Figure 2 This is a cross-sectional view of the high-pressure pipe body in this invention. Figure 3 This is a schematic diagram of the high-pressure gun in this invention; Figure 4 This is a cross-sectional schematic diagram of the connection mechanism between the high-pressure gun and the high-pressure pipe body in this invention; Figure 5 This is a schematic diagram of the spraying machine in this invention; The attached diagram lists the components represented by each number as follows: In the diagram: 1. High-pressure pipe body; 2. Connecting assembly; 3. Sealing groove; 4. Tightening knob; 5. Internal thread; 6. Seal; 7. High-pressure gun; 8. First external thread; 9. Sprayer body; 10. Second external thread; 11. Spring washer; 12. Extension handle; 13. Shock-absorbing rubber bushing. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-5 As shown, this invention is a manually installable high-pressure pipe connection assembly for a spraying machine. The sealing element 6 is an O-ring made of wear-resistant rubber. The specific specifications of the sealing element 6 are adapted to the sealing groove 3 on the high-pressure pipe body 1. The inner diameter of the sealing element 6 is consistent with the bottom diameter of the sealing groove 3. The wear-resistant rubber material is nitrile rubber, which has good high-pressure resistance, paint corrosion resistance, and wear resistance. It can effectively avoid sealing failure caused by pressure impact and media erosion during high-pressure spraying, thereby preventing paint leakage. The high-pressure pipe body 1 is made of high-pressure steel wire braided tubing to meet the high-pressure coating delivery requirements of the spraying machine. The high-pressure pipe body 1 has uniformly... The body is formed with a limiting step, and the connection between the limiting step and the high-pressure pipe body 1 is rounded. Its function is to limit the connection component 2 axially when it is assembled with the high-pressure pipe body 1, to prevent the connection component 2 from being displaced excessively during manual tightening, and to avoid damage to the seal 6 and the high-pressure pipe body 1. Two sealing grooves 3 are respectively opened on the outer surface of both ends of the high-pressure pipe body 1. The two sealing grooves 3 are evenly distributed along the axial direction of the high-pressure pipe body 1. The groove opening of the sealing groove 3 is chamfered at a chamfer angle of 45 degrees, which facilitates the installation of the seal 6 and avoids sharp edges from scratching the seal 6, thus extending the service life of the seal 6.

[0019] Two connecting components 2 are provided, respectively fitted onto both ends of the high-pressure pipe body 1. Each connecting component 2 includes a tightening knob 4, which is injection molded from engineering plastic. The outer surface of the tightening knob 4 is integrally formed with evenly distributed adjustment teeth. The adjustment teeth increase the friction between the hand and the tightening knob 4, making it easy for the operator to manually hold and tighten without the need for wrenches or other tools, reducing the difficulty of operation and the cost of accessories. On the inner wall of the tightening knob 4, there is an internal thread 5 that is adapted to the connection end of the high-pressure gun 7 and the spraying machine body 9. The internal thread 5 is a fine thread, and the surface of the internal thread 5 is rust-proofed by galvanizing, which can effectively prevent thread corrosion and ensure the smoothness and stability of the connection. At the same time, a guide chamfer is provided at the transition between the internal thread 5 and the inner wall of the tightening knob 4. The angle is 30 degrees, which facilitates docking with the first external thread 8 of the high-pressure gun 7 and the second external thread 10 of the sprayer body 9. Two extension handles 12 are fixedly connected to the outer surface of the tightening knob 4. The extension handles 12 are foldable. When manually tightening, the extension handles 12 extend the lever arm, which is more labor-saving. When not in use, they can be folded up to save space and make them more convenient to use. A spring washer 11 is fixedly connected to the bottom surface of the tightening knob 4. When the sprayer is working, there are continuous high-pressure pulses and vibrations. The elastic rebound force of the spring washer 11 continuously presses the tightening knob 4 to counteract the loosening of the threads caused by vibration. This solves the problem of easy loosening after manual tightening. It can be locked for a long time without tools. The torque of manual tightening is not as uniform as that of a wrench. The spring washer 11 can compensate for the thread fit clearance and the small deformation of the joint end face, so that the threads always keep tightly engaged and avoid the gap causing loosening and pressure loss.

[0020] The connecting end of the high-pressure gun 7 is integrally formed with a first external thread 8. The specifications of the first external thread 8 are perfectly matched with the internal thread 5 on the inner wall of the tightening knob 4. The thread surface is also galvanized for rust prevention. The end face of the connecting end of the high-pressure gun 7 is provided with a sealing surface. When the connecting component 2 is connected to the high-pressure gun 7, the sealing surface fits with the end face of the high-pressure pipe body 1. With the help of the sealing element 6, a double seal is achieved, further improving the sealing performance and preventing paint leakage. The output end of the spraying machine body 9 is integrally formed with a second external thread 10. The specifications of the second external thread 10 are the same as the internal thread 5 and the first external thread 8. The surface is galvanized for rust prevention. The output end of the spraying machine body 9 fits with the end face of the other end of the high-pressure pipe body 1. With the help of the sealing element 6, a reliable seal is achieved, ensuring no leakage during the high-pressure paint delivery process. A shock-absorbing rubber bushing 13 is added at the connection between the connecting component 2 and the high-pressure pipe body 1 to reduce vibration transmission and reduce the probability of loosening.

[0021] During use, the evenly distributed adjustment teeth on the outer wall of the tightening knob 4 increase the gripping friction, allowing the operator to directly tighten it manually without the need for wrenches or other tools. This enables the internal thread 5 to quickly engage with the first external thread 8 and the second external thread 10. The high-pressure pipe body 1 has two sealing grooves 3 at both ends, which cooperate with the wear-resistant rubber O-ring seals 6 to form a multi-seal structure after the threads are tightened, effectively preventing leakage of high-pressure media. The limiting step at the end of the high-pressure pipe body 1 can achieve axial positioning, preventing excessive displacement of the connecting component 2, protecting the seals 6 and ensuring a stable connection. Ultimately, this achieves a fast, sealed, and reliable connection between the high-pressure pipe and the spraying machine body 9 and the high-pressure gun 7.

[0022] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A manually installable high-pressure hose connection assembly for a spray painting machine, comprising a high-pressure hose body (1), two connection assemblies (2), a high-pressure gun (7), and a spray painting machine body (9), characterized in that: Two connecting components (2) are sleeved on both ends of the high-pressure pipe body (1). The connecting components (2) include tightening knobs (4). The outer surface of the tightening knobs (4) is fixedly connected with evenly distributed adjusting teeth. The outer surface of the high-pressure pipe body (1) has two sealing grooves (3). Both sealing grooves (3) are inlaid with sealing elements (6). The inner walls of the two tightening knobs (4) are provided with internal threads (5). The connecting end of the high-pressure gun (7) is provided with a first external thread (8) that matches the internal thread (5). The output end of the spraying machine body (9) is provided with a second external thread (10) that matches the internal thread (5).

2. The high-pressure pipe connection assembly for a spraying machine that can be manually installed according to claim 1, characterized in that: The connection end of the high-pressure gun (7) is detachably and sealed to one end of the high-pressure pipe body (1) through the connection component (2).

3. A high-pressure pipe connection assembly for a spraying machine that can be manually installed according to claim 1, characterized in that: The output end of the spraying machine body (9) is detachably and sealed to the other end of the high-pressure pipe body (1) via the connecting component (2).

4. A high-pressure pipe connection assembly for a spraying machine that can be manually installed according to claim 1, characterized in that: The sealing element (6) is an O-ring.

5. A high-pressure pipe connection assembly for a spraying machine that can be manually installed according to claim 4, characterized in that: The sealing element (6) is made of wear-resistant rubber.

6. A high-pressure pipe connection assembly for a spraying machine that can be manually installed according to claim 1, characterized in that: The connection end of the high-pressure pipe body (1) is provided with a limiting step.

7. A high-pressure pipe connection assembly for a spraying machine that can be manually installed according to claim 1, characterized in that: Two extension handles (12) are fixedly connected to the outer surface of the tightening knob (4), a spring washer (11) is fixedly connected to the bottom surface of the tightening knob (4), and a shock-absorbing rubber bushing (13) is fixedly connected to the connection between the connecting assembly (2) and the high-pressure pipe body (1).

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