Gun needle sealing mechanism and spray gun thereof
By incorporating two sealing structures within the spray gun, including a sealing block and a plug seal, the problem of glaze slurry hardening in the gaps of the spray gun housing is solved, resulting in a longer lifespan for the spray gun and material savings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU GLOBAL INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-26
AI Technical Summary
Existing spray guns are prone to having glaze slurry enter the gaps inside the spray gun housing and harden during the glaze slurry movement process, causing the nozzle to jam and affecting the service life of the spray gun.
The system employs two sealing structures along the axial direction of the spray gun needle, including a sealing block, a plug seal, and a sealing ring, to prevent the glaze slurry from entering the gaps in the spray gun housing and to prevent solidification in the glaze slurry circulation channel.
It effectively prevents glaze slurry from entering the gaps in the spray gun housing and hardening, avoids the gun needle from getting stuck, extends the service life of the spray gun, and saves materials.
Smart Images
Figure CN224271734U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a gun needle sealing mechanism and its spray gun, belonging to the technical field of spraying equipment. Background Technology
[0002] Glaze is a colorless or colored vitreous thin layer applied to the surface of ceramic products. It is made by grinding mineral raw materials (feldspar, quartz, talc, kaolin, etc.) and other raw materials in a certain proportion (some raw materials can be made into frits first), forming a glaze slurry, which is then applied to the surface of the ceramic body and fired at a certain temperature. Glaze can increase the mechanical strength, thermal stability, and dielectric strength of the product, and also has the characteristics of beautifying the object, facilitating cleaning, and preventing corrosion from dust and dirt.
[0003] The spray gun achieves spraying or stops spraying by blocking or releasing the nozzle with the needle. This requires the needle to move back and forth. During the movement of the needle, some glaze will move along with it. If the glaze is carried into the gap inside the spray gun housing, it will harden when it stops flowing, which can easily cause the needle to get stuck. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a gun needle sealing mechanism and its spray gun that can block glaze slurry, prevent glaze slurry from entering the gap inside the spray gun housing, and avoid the gun needle from getting stuck.
[0005] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:
[0006] This utility model discloses a gun needle sealing mechanism, including a first sealing block, which is disposed on the outer surface of the gun needle. Both ends of the first sealing block are provided with first plug seals, and both first plug seals are sleeved on the outer surface of the gun needle. The first plug seals and the first sealing block are used to block the material outside the first plug seals. A first sealing component is disposed on the outside of the first sealing block, and the first sealing component is disposed between the first sealing block and the spray gun housing.
[0007] The needle sealing mechanism further includes a second plug seal, which is disposed on the outside of the piston and between the piston and the nozzle housing.
[0008] The second sealing block has a second sealing component inside, which is disposed between the second sealing block and the gun needle, and is sleeved on the outer surface of the gun needle.
[0009] Furthermore, the first sealing assembly includes a first sealing ring disposed on the outer surface of the first sealing block, and the first sealing ring array comprises multiple rings.
[0010] Furthermore, a second sealing ring is provided between the first sealing block and the second sealing block, and the second sealing ring is sleeved on the outer surface of the gun needle, and at least one second sealing ring is provided.
[0011] Furthermore, the second sealing assembly includes a third sealing ring disposed between the gun needle and the second sealing block, the third sealing ring being sleeved on the outer surface of the gun needle, and at least one third sealing ring being provided.
[0012] Furthermore, the grooves of the first and second plug seals face the material inlet direction.
[0013] In another aspect, this utility model discloses a spray gun, including a needle sealing mechanism. The spray gun further includes a spray gun housing, a needle, and a piston. The spray gun housing is provided with a first sealing groove and a second sealing groove. The first sealing block is disposed in the first sealing groove, and the first sealing assembly is interference-fitted with the sidewalls of the first sealing block and the first sealing groove, respectively. The second sealing block is disposed in the second sealing groove, and the second sealing plug is interference-fitted with the sidewalls of the second sealing block and the second sealing groove, respectively. The needle is located inside the first sealing block and the second sealing block, and the needle moves relative to the first sealing block.
[0014] Furthermore, the spray gun housing is provided with an atomizing cap and a connecting seat at both ends, and the atomizing cap is provided with a discharge port, which is used at least to spray out the slurry in the material chamber; the discharge port corresponds to the position of the gun needle; the connecting seat is provided with a first air inlet, a second air inlet, a material inlet, and a return port, and the spray gun housing is provided with a first air intake channel, a second air intake channel, a material inlet channel, and a return channel; the first air inlet is connected to the first air intake channel, and the gas enters the material chamber through the first air inlet and the first air intake channel to blow the slurry and form a mist-like particle; the second air inlet is connected to the second air intake channel, and the gas enters the material chamber through the second air inlet and the second air intake channel to blow the slurry and form a fan-shaped spray; the material inlet channel and the return channel are respectively connected to the material cylinder through pipes, and the slurry circulates between the material inlet, the material intake channel, the material chamber, the return channel, the return port, and the material cylinder.
[0015] Compared with the prior art, the advantages of this utility model include:
[0016] 1) The present invention provides a gun needle sealing mechanism, which provides two seals along the axial direction of the gun needle. Each seal includes a sealing block, a plug seal and a sealing ring. It can effectively prevent glaze slurry and other liquids from entering the gap between the gun needle and the spray gun housing, thereby effectively preventing the glaze slurry and other liquids from hardening in the gap between the gun needle and the spray gun housing, and thus effectively preventing the gun needle from getting stuck and extending the service life of the spray gun.
[0017] 2) The spray gun provided by this utility model allows glaze and other slurries to circulate between the feed inlet, feed channel, material chamber, return channel, return port and material cylinder, preventing the slurry from solidifying, avoiding the need to clean the equipment due to slurry solidification, saving materials, and extending the service life of the spray gun. Attached Figure Description
[0018] 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, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of a gun needle sealing mechanism provided in a typical embodiment of this utility model;
[0020] Figure 2 This is a schematic diagram of the structure of a spray gun provided in a typical embodiment of this utility model;
[0021] Explanation of reference numerals in the attached drawings: 1. First sealing block; 2. First plug seal; 3. Second sealing block; 4. Second plug seal; 5. First sealing ring; 6. Second sealing ring; 7. Third sealing ring; 100. Gun needle sealing mechanism; 200. Spray gun housing; 300. Gun needle; 400. First sealing groove; 500. Second sealing groove; 600. Atomizing cap; 700. Connecting seat; 800. Discharge port. Detailed Implementation
[0022] In view of the shortcomings of the prior art, the inventor of this case, through long-term research and extensive practice, has come up with the technical solution of this utility model. The following will further explain the technical solution, its implementation process, and its principles.
[0023] This utility model discloses a gun needle sealing mechanism, such as Figure 1As shown, the system includes a first sealing block 1, which is disposed on the outer surface of the gun needle 300. The first sealing block 1 encloses the gun needle 300, and the gun needle 300 moves within the first sealing block 1. Both ends of the first sealing block 1 are provided with first plug seals 2, and both first plug seals 2 are sleeved on the outer surface of the gun needle 300. The first plug seals 2 and the first sealing block 1 at least block the material outside the first plug seal 2. Preferably, the groove of the first plug seal 2 faces the material inlet direction. In this embodiment, the groove of the first plug seal 2 faces the outlet 800. As the gun needle 300 moves away from the material outlet, it will cause the glaze slurry to move. Under the obstruction of the first plug seal 2, the glaze slurry is blocked outside the first plug seal 2, preventing the glaze slurry from entering the groove of the spray gun housing 200 and causing the gun needle 300 to jam. The plug seal has a better sealing effect than a sealing ring.
[0024] To improve the sealing effect, a first sealing component is provided on the outside of the first sealing block 1. The first sealing component is located between the first sealing block 1 and the spray gun housing 200. Specifically, the first sealing component includes a first sealing ring 5 disposed on the outer surface of the first sealing block 1. Multiple first sealing rings 5 are arranged in an array. The first sealing rings 5 can be two, three or four. In this embodiment, there are two first sealing rings 5.
[0025] The gun needle sealing mechanism further includes a second plug seal 4, which is disposed on the outside of the piston 3 and between the piston 3 and the spray gun housing 200. Preferably, the groove of the second plug seal 4 faces the material inlet direction. In this embodiment, the groove of the first plug seal 2 faces the outlet 800 direction. The second plug seal 4 can prevent glaze slurry from entering the groove behind the spray gun housing 200.
[0026] To improve the sealing effect, a second sealing assembly is provided inside the piston 3. The second sealing assembly is disposed between the piston 3 and the gun needle 300, and is sleeved on the outer surface of the gun needle 300. Specifically, the second sealing assembly includes a third sealing ring 7 disposed between the gun needle 300 and the piston 3. The third sealing ring 7 is sleeved on the outer surface of the gun needle 300, and at least one third sealing ring 7 is provided. In this embodiment, there is only one third sealing ring 7.
[0027] In some implementations, a second sealing ring 6 is provided between the first sealing block 1 and the second sealing component. The second sealing ring 6 is sleeved on the outer surface of the gun needle 300. At least one second sealing ring 6 is provided. In this implementation, one second sealing ring 6 is provided.
[0028] This application provides two seals along the axial direction of the needle 300. Each seal includes a sealing block, a plug seal, and a sealing ring, which can effectively prevent glaze slurry and other liquids from entering the gap between the needle 300 and the spray gun housing 200. This effectively prevents the glaze slurry and other liquids from hardening in the gap between the needle 300 and the spray gun housing 200, thereby effectively preventing the needle 300 from getting stuck and extending the service life of the spray gun.
[0029] This utility model also discloses a spray gun, such as Figure 2 As shown, the spray gun includes a needle sealing mechanism. The spray gun also includes a spray gun housing 200, a needle 300, and a piston 3. The spray gun housing 200 has a first sealing groove 400 and a second sealing groove 500. A first sealing block 1 is disposed within the first sealing groove 400. The first sealing assembly is interference-fitted with the side walls of the first sealing block 1 and the first sealing groove 400, respectively. The piston 3 is disposed within the second sealing groove 500. A second sealing seal 4 is interference-fitted with the side walls of the piston 3 and the second sealing groove 500, respectively. The needle 300 is located inside the first sealing block 1 and the piston 3, and the needle 300 moves relative to the first sealing block 1.
[0030] Based on the above, the spray gun housing 200 is provided with an atomizing cap 600 and a connecting seat 700 at both ends, respectively. The atomizing cap 600 is provided with a discharge port 800, which is used at least for spraying out the slurry in the feeding chamber. The discharge port 800 corresponds to the position of the gun needle 300. The connecting seat 700 is provided with a first air inlet, a second air inlet, a feeding port, and a return port. The spray gun housing 200 is provided with a first air inlet channel, a second air inlet channel, a feeding channel, and a return channel. The first air inlet is connected to the first air intake channel, and gas enters the material chamber through the first air inlet and the first air intake channel to blow the slurry and make the slurry form a mist-like particle; the second air inlet is connected to the second air intake channel, and gas enters the material chamber through the second air inlet and the second air intake channel to blow the slurry and make the slurry form a fan-shaped spray; the feed channel and the return channel are respectively connected to the material cylinder through pipes, and the slurry circulates between the feed inlet, the feed channel, the material chamber, the return channel, the return port and the material cylinder.
[0031] This application enables the slurry, such as glaze, to circulate between the feed inlet, feed channel, material chamber, return channel, return port, and material cylinder, preventing the slurry from solidifying, avoiding equipment cleaning due to slurry solidification, saving materials, and extending the service life of the spray gun.
[0032] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.
Claims
1. A gun needle sealing mechanism, characterized in that: include A first sealing block (1) is disposed on the outer surface of the gun needle. Both ends of the first sealing block (1) are provided with first plug seals (2). Both first plug seals (2) are sleeved on the outer surface of the gun needle. The first plug seals (2) and the first sealing block (1) are used to block the material outside the first plug seals (2). A first sealing assembly is disposed on the outside of the first sealing block (1). The first sealing assembly is disposed between the first sealing block (1) and the spray gun housing (200). The second plug seal (4) is disposed on the outside of the piston (3) and between the piston (3) and the spray gun housing. The second plug seal (4) is provided with a second sealing assembly on the inside of the second plug seal (4). The second sealing assembly is disposed between the piston (3) and the gun needle and is sleeved on the outer surface of the gun needle.
2. The gun needle sealing mechanism according to claim 1, characterized in that: The first sealing assembly includes a first sealing ring (5) disposed on the outer surface of the first sealing block (1), and the array of the first sealing rings (5) is provided with a plurality of them.
3. The gun needle sealing mechanism according to claim 1, characterized in that: A second sealing ring (6) is provided between the first sealing block (1) and the second sealing assembly. The second sealing ring (6) is sleeved on the outer surface of the gun needle, and at least one second sealing ring (6) is provided.
4. The gun needle sealing mechanism according to claim 1, characterized in that: The second sealing assembly includes a third sealing ring (7) disposed between the gun needle and the piston (3), the third sealing ring (7) being sleeved on the outer surface of the gun needle, and at least one third sealing ring (7) being provided.
5. The gun needle sealing mechanism according to claim 1, characterized in that: The grooves of the first plug seal (2) and the second plug seal (4) face the material inlet direction.
6. A spray gun, characterized in that: The spray gun includes the needle sealing mechanism according to any one of claims 1-5, and further includes a spray gun housing (200), a needle (300) and a piston (3). The spray gun housing is provided with a first sealing groove (400) and a second sealing groove (500). The first sealing block (1) is disposed in the first sealing groove (400). The first sealing assembly is press-fitted with the sidewalls of the first sealing block (1) and the first sealing groove (400) respectively. The piston (3) is disposed in the second sealing groove (500). The second sealing seal (4) is press-fitted with the sidewalls of the piston (3) and the second sealing groove (500) respectively. The needle (300) is located inside the first sealing block (1) and the piston (3), and the needle (300) moves relative to the first sealing block (1).
7. A spray gun according to claim 6, characterized in that: The spray gun housing (200) is provided with an atomizing cap (600) and a connecting seat (700) at both ends. The atomizing cap (600) is provided with a discharge port (800), which is used at least for spraying out the slurry in the feeding chamber. The position of the discharge port (800) corresponds to that of the gun needle (300). The connecting seat (700) is provided with a first air inlet, a second air inlet, a feed inlet, and a return inlet. The spray gun housing (200) is provided with a first air intake channel, a second air intake channel, a feed channel, and a return channel. The first air inlet is connected to the first air intake channel, and gas enters the material chamber through the first air inlet and the first air intake channel to blow the slurry and make the slurry form a mist-like particle. The second air inlet is connected to the second air intake channel, and gas enters the material chamber through the second air inlet and the second air intake channel to blow the slurry and make the slurry form a fan-shaped spray. The feed channel and the return channel are respectively connected to the material cylinder through pipes, and the slurry circulates between the feed inlet, the feed channel, the material chamber, the return channel, the return inlet, and the material cylinder.