A paint cut-off valve spool

Abstract

The utility model discloses a lacquer liquid cut -off valve valve core, including valve core post, the valve core post bottom integrated valve core connecting portion, the valve core connecting portion bottom integrated valve core installation portion, the valve core installation portion outer periphery is provided with annular C type groove, the C type groove is connected with elastic sealing member in the clamping. The utility model discloses valve core adopts valve core post, valve core connecting portion and valve core installation portion integrated design, completely discarded traditional split processing after welding assembly's mode, from the root, eliminated the coaxiality deviation of easy production in the welding process, ensure the cooperation accuracy of valve core assembly and valve body inner chamber, effectively avoid the jam phenomenon in the process of opening and closing, improve the precision of cut -off control. Meanwhile, the valve core connecting portion adopts the smooth circular arc structure of the gradually changing outer diameter, replaces the traditional step type mutation structure, significantly alleviates the stress concentration problem of the connecting part.

Description

Technical Field

[0001] This utility model relates to the field of valve core technology, and in particular to a valve core for a paint liquid shut-off valve. Background Technology

[0002] In industrial fields such as coating, printing and paint production, paint shut-off valves are the core fluid control components for achieving precise control of paint delivery. As the core actuator of the shut-off valve, the rationality of its structural design, connection stability, sealing reliability and wear and corrosion resistance directly determine the working accuracy, service life and operational safety of the shut-off valve.

[0003] Existing paint flow interruption valve cores typically use a single columnar structure as the core support, with simple stepped connections for mounting components. However, abrupt changes in the outer diameter at the connection point lead to significant stress concentration. Under the alternating loads caused by frequent opening and closing of the valve core, fatigue cracks or even fractures easily occur at the connection point, directly causing valve core failure. This not only increases equipment maintenance costs but also disrupts production continuity due to sudden shutdowns. Furthermore, the support and mounting components of existing valve cores are mostly machined separately and then welded together. During assembly, coaxiality deviations are prone to occur, resulting in decreased precision in the fit between the valve core and the valve body cavity after assembly. This can lead to jamming during opening and closing, affecting the accuracy of flow interruption control. To address these issues, this application proposes a paint flow interruption valve core. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a valve core for a paint flow interruption valve. The valve core employs an integrated design, combining the valve core column, valve core connecting part, and valve core mounting part. This completely eliminates the traditional method of separate processing followed by welding, fundamentally eliminating coaxiality deviations that easily occur during welding. This ensures the precise fit between the valve core and the valve body cavity after assembly, effectively preventing jamming during opening and closing, and improving the accuracy of flow interruption control. Simultaneously, the valve core connecting part adopts a smooth, arc-shaped structure with a gradually changing outer diameter, replacing the traditional stepped, abrupt structure, significantly alleviating stress concentration problems at the connection point. Under the alternating load of frequent valve core opening and closing, it effectively reduces the generation of fatigue cracks, lowers the risk of fracture failure, extends the valve core's service life, reduces equipment maintenance costs, and ensures production continuity.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A paint flow interruption valve core includes a valve core column, a valve core connecting part integrally formed at the bottom of the valve core column, a valve core mounting part integrally formed at the bottom of the valve core connecting part, an annular C-shaped groove formed on the outer periphery of the valve core mounting part, an elastic sealing element snapped into the C-shaped groove, two U-shaped mounting grooves symmetrically formed on the outer wall of the valve core column, a positioning block embedded in each U-shaped mounting groove, a U-shaped mounting seat integrally formed on the top of the two positioning blocks and fixedly connected thereto, a first fastening bolt installed between the positioning block and the valve core column, a second fastening bolt installed between the middle part of the U-shaped mounting seat and the valve core column, and a U-shaped connecting lug welded to the top of the U-shaped mounting seat.

[0006] Preferably, the outer diameter of the valve core connection gradually increases from the end near the valve core column to the end near the valve core mounting part, and the outer wall of the valve core connection is arranged in a smooth arc shape.

[0007] Preferably, the seal is arranged within the C-groove and the outer wall of the seal abuts against the inner wall of the C-groove.

[0008] Preferably, the two positioning blocks are inserted into the corresponding U-shaped mounting slots and slidably connected thereto.

[0009] Preferably, the surfaces of the valve core column, valve core connection part and valve core mounting part are sequentially sprayed with a wear-resistant ceramic layer with a thickness of 0.2 mm and a tungsten carbide coating with a thickness of 0.1 mm.

[0010] Preferably, the positioning insert has a first through hole, the valve core has a first threaded groove, the first fastening bolt is arranged through the first through hole, and the end of the first fastening bolt is inserted into the first threaded groove and threadedly connected to it.

[0011] Preferably, the U-shaped mounting base has a second through hole, the valve core column has a second threaded groove, the second fastening bolt is arranged through the second through hole, and the end of the second fastening bolt is inserted into the second threaded groove and threadedly connected to it.

[0012] Compared with the prior art, the advantages of this utility model are as follows: 1. The valve core adopts an integrated design, with the valve core column, valve core connecting part, and valve core mounting part molded as a single piece. This completely eliminates the traditional method of separate processing followed by welding assembly, fundamentally eliminating coaxiality deviations that are prone to occur during welding. This ensures the fitting accuracy between the valve core and the valve body cavity after assembly, effectively avoiding jamming during opening and closing, and improving the precision of flow interruption control. Simultaneously, the valve core connecting part adopts a smooth, arc-shaped structure with a gradually changing outer diameter, replacing the traditional stepped, abrupt structure, significantly alleviating stress concentration problems at the connection point. Under the alternating load of frequent valve core opening and closing, it can effectively reduce the generation of fatigue cracks, lower the risk of fracture failure, extend the valve core's service life, reduce equipment maintenance costs, and ensure production continuity.

[0013] 2. The valve core surface employs a composite spraying process of "wear-resistant ceramic layer + tungsten carbide coating". The 0.2mm thick wear-resistant ceramic layer significantly improves the wear resistance of the valve core surface; the 0.1mm thick tungsten carbide coating further enhances the surface's corrosion resistance and hardness. The synergistic effect of these two coatings results in a significant improvement in wear resistance, corrosion resistance, and impact resistance compared to traditional single-coated or uncoated valve cores, further extending the valve core's service life and reducing replacement frequency.

[0014] 3. An annular C-groove is formed on the outer periphery of the valve core mounting section, providing a stable installation space for the elastic seal and effectively limiting its radial displacement. After the elastic seal is engaged in the C-groove, its outer wall tightly abuts against the inner wall of the C-groove, forming a reliable radial sealing structure. This effectively prevents paint leakage from the gap between the valve core mounting section and the valve body, improving the sealing reliability of the shut-off valve and avoiding paint waste and leakage damage to equipment and the environment.

[0015] In summary, the valve core adopts an integrated design, combining the valve core column, valve core connector, and valve core mounting part. This completely eliminates the traditional method of separate processing followed by welding assembly, fundamentally eliminating coaxiality deviations that are prone to occur during welding. This ensures the precise fit between the valve core and the valve body cavity after assembly, effectively preventing jamming during opening and closing, and improving the accuracy of flow interruption control. Simultaneously, the valve core connector uses a smooth, arc-shaped structure with a gradually changing outer diameter, replacing the traditional stepped, abrupt structure, significantly alleviating stress concentration problems at the connection point. Under the alternating loads of frequent valve core opening and closing, it effectively reduces the generation of fatigue cracks, lowers the risk of fracture failure, extends the valve core's service life, reduces equipment maintenance costs, and ensures production continuity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a paint flow interruption valve core proposed in this utility model; Figure 2 This is a schematic diagram of the first cross-section of the valve core of a paint flow interruption valve proposed in this utility model; Figure 3This is a schematic diagram of the second cross section of the valve core of a paint flow interruption valve proposed in this utility model.

[0017] In the diagram: 1 Valve core column, 2 Valve core connection part, 3 Valve core mounting part, 4 C-shaped groove, 5 Seal, 6 U-shaped mounting groove, 7 U-shaped mounting seat, 8 Positioning plug, 9 First fastening bolt, 10 Second fastening bolt, 11 U-shaped connecting ear. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Reference Figures 1-3 A paint flow interruption valve core includes a valve core column 1, which serves as the core support structure of the valve core and provides an installation reference for other components. The bottom of the valve core column 1 is integrally formed with a valve core connecting part 2, which realizes a stable connection between the valve core column 1 and the valve core mounting part 3 and transmits the assembly force. The bottom of the valve core connecting part 2 is integrally formed with a valve core mounting part 3, which is used to assemble the valve core into the valve body and provides bottom mounting positioning. The outer diameter of the valve core connecting part 2 gradually increases from the end near the valve core column 1 to the end near the valve core mounting part 3. The outer wall of the valve core connecting part 2 is arranged in a smooth arc shape (the radius of curvature of the outer wall of the valve core connecting part 2 is R8mm, and the connection between it and the valve core column 1 and the valve core mounting part 3 adopts an R2mm transition arc to ensure that the surface is stepless).

[0020] The surfaces of the valve core column 1, valve core connection part 2 and valve core mounting part 3 are sequentially coated with a wear-resistant ceramic layer with a thickness of 0.2 mm and a tungsten carbide coating with a thickness of 0.1 mm. The wear-resistant ceramic layer mainly improves the wear resistance of the valve core surface, while the tungsten carbide coating further enhances the surface corrosion resistance and hardness. The two work together to extend the service life of the valve core.

[0021] An annular C-shaped groove 4 is formed on the outer periphery of the valve core mounting part 3. This C-shaped groove 4 provides installation space for the elastic seal 5 and restricts its radial displacement. The elastic seal 5 is engaged within the C-shaped groove 4. The seal 5 is arranged within the C-shaped groove 4, and its outer wall abuts against the inner wall of the C-shaped groove 4. The elastic seal 5 is tightly fitted with the inner wall of the C-shaped groove 4, achieving a seal between the valve core mounting part 3 and the valve body, preventing paint leakage from the installation gap. Two U-shaped mounting grooves 6 are symmetrically formed on the outer wall of the valve core column 1. The two U-shaped mounting grooves 6 are symmetrically distributed to ensure safety. The installation is balanced, providing precise installation guidance and sliding trajectory restriction for the positioning plug 8. Each U-shaped mounting groove 6 is fitted with a positioning plug 8. After the positioning plug 8 is embedded in the U-shaped mounting groove 6, it can slide along the groove to adjust its position, achieving synchronous positioning with the U-shaped mounting base 7. The top of the two positioning plugs 8 is integrally formed with a U-shaped mounting base 7 that is fixedly connected to it. The U-shaped mounting base 7 connects the two positioning plugs 8 into a whole, forming a stable installation carrier structure. The two positioning plugs 8 are respectively inserted into the corresponding U-shaped mounting groove 6 and slidably connected to it.

[0022] A first fastening bolt 9 is installed on the positioning insert 8 and the valve core column 1. A first through hole is opened on the positioning insert 8, and a first threaded groove is opened on the valve core column 1. The first fastening bolt 9 is arranged through the first through hole, and the end of the first fastening bolt 9 is inserted into the first threaded groove and threadedly connected to it. The first fastening bolt 9 fastens the positioning insert 8 to the valve core column 1 through the threaded engagement, realizing the fixed connection between the positioning insert 8 and the valve core column 1. A second fastening bolt 10 is installed on the middle part of the U-shaped mounting base 7 and the valve core column 1. A through hole is opened on the U-shaped mounting base 7. There is a second through hole, and a second threaded groove is provided on the valve core column 1. The second fastening bolt 10 is arranged through the second through hole. The end of the second fastening bolt 10 is inserted into the second threaded groove and threadedly connected to it. The second fastening bolt 10 is reinforced from the middle of the U-shaped mounting seat 7, forming a double fixation with the first fastening bolt 9, which improves the stability of the connection between the U-shaped mounting seat 7 and the valve core column 1. A U-shaped connecting ear 11 is welded to the top of the U-shaped mounting seat 7. The U-shaped connecting ear 11 is used to connect with the external drive mechanism to transmit the driving force to control the opening and closing action of the valve core.

[0023] In this utility model, the valve core of the paint flow interruption valve is supported by the valve core column 1 as the core support reference, and is connected to the valve core mounting part 3 through the valve core connecting part 2; the C-shaped groove 4 of the valve core mounting part 3 positions the elastic sealing element 5 to achieve a leak-proof seal with the valve body; the U-shaped mounting groove 6 of the valve core column 1 guides the positioning block 8, and the U-shaped mounting seat 7 is double-fixed by the first fastening bolt 9 and the second fastening bolt 10 to ensure a stable connection; the U-shaped connecting ear 11 connects to the external drive mechanism to control the opening and closing of the valve core; the wear-resistant ceramic layer and the tungsten carbide coating work together to ensure the wear and corrosion resistance of the valve core and improve the reliability of operation.

Claims

1. A paint flow interruption valve core, comprising a valve core column (1), characterized in that, The valve core column (1) has an integrally formed valve core connecting part (2) at the bottom, and an integrally formed valve core mounting part (3) at the bottom of the valve core connecting part (2). The valve core mounting part (3) has an annular C-shaped groove (4) on its outer periphery. An elastic sealing element (5) is snapped into the C-shaped groove (4). Two U-shaped mounting grooves (6) are symmetrically opened on the outer wall of the valve core column (1). Each U-shaped mounting groove (6) is fitted with a positioning block (8). The top of the two positioning blocks (8) is integrally formed with a U-shaped mounting seat (7) that is fixedly connected to them. The positioning blocks (8) and the valve core column (1) are fitted with a first fastening bolt (9). The middle part of the U-shaped mounting seat (7) and the valve core column (1) are fitted with a second fastening bolt (10). The top of the U-shaped mounting seat (7) is welded with a U-shaped connecting ear (11).

2. The valve core of the paint flow interruption valve according to claim 1, characterized in that, The outer diameter of the valve core connecting part (2) gradually increases from the end near the valve core column (1) to the end near the valve core mounting part (3), and the outer wall of the valve core connecting part (2) is arranged in a smooth arc shape.

3. The valve core of the paint flow interruption valve according to claim 1, characterized in that, The seal (5) is arranged in the C-groove (4) and the outer wall of the seal (5) abuts against the inner wall of the C-groove (4).

4. The valve core of a paint flow interruption valve according to claim 1, characterized in that, The two positioning blocks (8) are respectively inserted into the corresponding U-shaped mounting slots (6).

5. The valve core of a paint flow interruption valve according to claim 1, characterized in that, The surfaces of the valve core column (1), valve core connection part (2) and valve core mounting part (3) are sequentially sprayed with a wear-resistant ceramic layer with a thickness of 0.2 mm and a tungsten carbide coating with a thickness of 0.1 mm.

6. The valve core of a paint flow interruption valve according to claim 1, characterized in that, The positioning plug (8) has a first through hole, the valve core (1) has a first threaded groove, the first fastening bolt (9) is arranged through the first through hole, and the end of the first fastening bolt (9) is inserted into the first threaded groove and threadedly connected to it.

7. The valve core of a paint flow interruption valve according to claim 1, characterized in that, The U-shaped mounting base (7) has a second through hole, the valve core column (1) has a second threaded groove, the second fastening bolt (10) is arranged through the second through hole, and the end of the second fastening bolt (10) is inserted into the second threaded groove and threadedly connected to it.

Images