A check valve resistant to particle erosion

Abstract

The utility model discloses a check valve of preventing particle erosion relates to valve technical field, including valve seat, one end of valve seat is installed with feed pipe, the inner wall of feed pipe is installed with conical guide vane, and the inside of valve seat is provided with conical hole. The utility model discloses, the semicircle streamline type design of semicircular valve core has reduced the resistance to medium, has reduced the gathering of particle on its surface, has further enhanced its anti -erosion ability, simultaneously, the cooperation structure of conical hole and semicircular valve core has reduced the possibility of particle jammed between both while guaranteeing good sealing performance, has guaranteed the normal opening and closing of check valve, has reduced the risk of leakage, secondly, the setting of conical guide vane can effectively guide medium flow, reduces the turbulence and impact of medium, reduces the direct erosion of particle to semicircular valve core, prolongs the service life of semicircular valve core.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a check valve for preventing particulate erosion. Background Technology

[0002] In industrial pipeline systems, the main function of check valves is to prevent backflow of media. However, in media environments containing solid particles (such as dust, sand, slag, etc.), key components of traditional check valves, such as the valve core and valve seat, are easily eroded by particles, leading to decreased sealing performance, shortened service life, and causing many inconveniences and safety hazards to industrial production.

[0003] In existing technologies, traditional check valves face numerous problems when operating in particulate-containing media environments. Firstly, the valve core structure hinders the smooth passage of particles, easily leading to particle accumulation around the valve core and increasing the probability of erosion. Secondly, the valve seat design cannot effectively prevent particle embedding, resulting in decreased sealing performance. Furthermore, conventional materials are unable to withstand the continuous impact and wear of particles, significantly shortening the check valve's service life. Frequent valve replacements not only increase maintenance costs but also affect the continuity and stability of production. Therefore, developing a highly efficient particulate-erosion-resistant check valve is of significant practical importance. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a check valve to prevent particle erosion.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a check valve for preventing particle erosion, comprising a valve seat, a feed pipe installed at one end of the valve seat, a tapered guide pipe installed on the inner wall of the feed pipe, a tapered hole opened inside the valve seat, a semi-circular valve core disposed inside the tapered hole, a cross-shaped circular plate installed inside the valve seat, and a support spring installed at one end of the cross-shaped circular plate.

[0006] Preferably, the tapered end of the tapered guide tube is disposed inside the tapered hole, and the other end of the support spring is fixed to one end of the semi-circular valve core.

[0007] Preferably, a cylinder is installed at one end of the cross-shaped circular plate, and a mating sleeve is slidably installed on the outer wall of the cylinder.

[0008] Preferably, one end of the mating cylinder is fixed to one end of the semi-circular valve core, and the support spring is located inside the cylinder and the mating cylinder.

[0009] Preferably, a first annular gasket is installed at the other end of the mating cylinder, and a second annular gasket is installed at one end of the cylinder.

[0010] Preferably, the inner wall of the first annular pad is in contact with the outer wall of the cylinder, and the outer wall of the second annular pad is in contact with the inner wall of the mating cylinder.

[0011] Preferably, a discharge pipe is installed at the other end of the valve seat.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the semi-circular streamlined design of the semi-circular valve core reduces resistance to the medium, reduces particle aggregation on its surface, and further enhances its erosion resistance. At the same time, the matching structure of the tapered hole and the semi-circular valve core ensures good sealing performance while reducing the possibility of particles getting stuck between them, ensuring the normal opening and closing of the check valve and reducing the risk of leakage. Secondly, the setting of the tapered guide tube can effectively guide the flow of the medium, reduce the turbulence and impact of the medium, reduce the direct erosion of the semi-circular valve core by particles, and extend the service life of the semi-circular valve core.

[0013] 2. In this utility model, the sliding fit between the cylinder and the mating cylinder provides a stable guide for the movement of the semi-circular valve core, ensuring the stability of the check valve's operation. At the same time, the support spring is located inside both and is well protected, reducing the erosion and damage of particles to the spring and extending its service life.

[0014] 3. In this utility model, the setting of No. 1 and No. 2 circular annular gaskets reduces the friction and wear between the mating cylinder and the cylinder, improves the service life of the components, and at the same time plays a certain sealing role, ensuring the normal working environment of the internal structure of the check valve. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of a check valve for preventing particulate erosion is provided for this utility model. Figure 2 This utility model presents a partial half-sectional structural diagram of a check valve designed to prevent particulate erosion. Figure 3 This utility model provides a three-dimensional view of a semi-circular valve core, a cross-shaped circular plate, a cylinder, and a mating cylinder for a check valve designed to prevent particulate erosion. Figure 4 This utility model presents an exploded view of the cross plate and cylinder of a check valve designed to prevent particulate erosion.

[0016] Legend: 1. Valve seat; 2. Discharge pipe; 3. Feed pipe; 4. Conical guide pipe; 5. Semi-circular valve core; 6. Conical hole; 7. Cross plate; 8. Cylinder; 9. Fitting cylinder; 10. Support spring; 11. No. 1 circular ring gasket; 12. No. 2 circular ring gasket. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0019] Example 1: As Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model provides a check valve for preventing particle erosion, including a valve seat 1, a feed pipe 3 installed at one end of the valve seat 1, a tapered guide pipe 4 installed on the inner wall of the feed pipe 3, a tapered hole 6 opened inside the valve seat 1, a semi-circular valve core 5 installed inside the tapered hole 6, a cross plate 7 installed inside the valve seat 1, a support spring 10 installed at one end of the cross plate 7, the tapered end of the tapered guide pipe 4 is located inside the tapered hole 6, the other end of the support spring 10 is fixed to one end of the semi-circular valve core 5, and a discharge pipe 2 is installed at the other end of the valve seat 1; A cylinder 8 is installed at one end of the cross-shaped circular plate 7. A mating cylinder 9 is slidably installed on the outer wall of the cylinder 8. One end of the mating cylinder 9 is fixed to one end of the semi-circular valve core 5. The support spring 10 is located inside the cylinder 8 and the mating cylinder 9.

[0020] The specific settings and functions of this embodiment are described below. Valve seat 1 is the basic component of the entire check valve, which plays the role of supporting and connecting other components. One end of it is equipped with feed pipe 3, which is used for the inflow of medium and is the channel for the medium to enter the check valve. A tapered guide tube 4 is installed on the inner wall of the feed pipe 3. The tapered guide tube 4 adopts a tapered design. When the medium flows in from the feed pipe 3, the tapered guide tube 4 can guide and rectify the medium, so that the medium enters the valve seat 1 more smoothly and reduces turbulence and impact during the medium flow process. At the same time, the tapered end of the tapered guide tube 4 is set inside the tapered hole 6 opened inside the valve seat 1. This structure helps to further optimize the flow path of the medium and avoid the medium directly impacting the semi-circular valve core 5, thereby reducing the erosion of the semi-circular valve core 5 by particles. The valve seat 1 has a tapered hole 6 inside, which provides space for the movement of the semi-circular valve core 5. At the same time, its tapered structure cooperates with the semi-circular valve core 5 to form a good seal when the semi-circular valve core 5 is closed, preventing the medium from flowing back. The semi-circular valve core 5 is set inside the tapered hole 6. The semi-circular valve core 5 adopts a semi-circular design and has a good streamline shape. When the medium flows, it can reduce the resistance to the medium and reduce the accumulation and impact of particles on its surface. The semi-circular valve core 5 can move within a certain range in the tapered hole 6 to realize the opening and closing of the check valve. A cross-shaped circular plate 7 is installed inside the valve seat 1. The cross-shaped circular plate 7 serves to fix and support the valve. A cylinder 8 is installed at one end of the cross-shaped circular plate 7. The cylinder 8 provides space for the installation and guidance of the support spring 10. A mating cylinder 9 is slidably installed on the outer wall of the cylinder 8. The mating cylinder 9 can slide on the outer wall of the cylinder 8. One end of the mating cylinder 9 is fixed to one end of the semi-circular valve core 5, so that the movement of the semi-circular valve core 5 can be transmitted to the support spring 10 through the mating cylinder 9. The support spring 10 is located inside the cylinder 8 and the mating cylinder 9. Its other end is fixed to one end of the semi-circular valve core 5. The support spring 10 provides the return force for the semi-circular valve core 5. When the medium pressure decreases, the support spring 10 can push the semi-circular valve core 5 to close, preventing the medium from flowing back. The other end of the valve seat 1 is equipped with a discharge pipe 2, which is used for the outflow of the medium and to transport the medium that has passed through the check valve to the subsequent pipeline system.

[0021] Example 2: Figure 2 , Figure 3 and Figure 4 As shown, a first annular pad 11 is installed at the other end of the mating cylinder 9, and a second annular pad 12 is installed at one end of the cylinder 8. The inner wall of the first annular pad 11 is in contact with the outer wall of the cylinder 8, and the outer wall of the second annular pad 12 is in contact with the inner wall of the mating cylinder 9.

[0022] The overall effect of this embodiment is that a first annular pad 11 is installed at the other end of the mating cylinder 9, and a second annular pad 12 is installed at one end of the cylinder 8. The inner wall of the first annular pad 11 is in contact with the outer wall of the cylinder 8, and the outer wall of the second annular pad 12 is in contact with the inner wall of the mating cylinder 9. These two annular pads are made of wear-resistant and corrosion-resistant materials, which can reduce the friction and wear between the mating cylinder 9 and the cylinder 8, and at the same time play a certain sealing role to prevent the medium from entering the interior of the cylinder 8 and the mating cylinder 9 and affecting the normal operation of the support spring 10.

[0023] The usage and working principle of this device are as follows: When the medium (containing particles) flows in from the feed pipe 3, it first comes into contact with the conical guide pipe 4 installed on the inner wall of the feed pipe 3. The conical design of the conical guide pipe 4 guides and straightens the medium, making the medium flow, which may have been turbulent, more stable. The medium flows along the inner wall of the conical guide pipe 4 to the conical hole 6 inside the valve seat 1. Since the conical end of the conical guide pipe 4 is located inside the conical hole 6, the flow path of the medium is further optimized, avoiding the medium from directly impacting the semi-circular valve core 5 located inside the conical hole 6, and reducing the direct erosion of the semi-circular valve core 5 by particles. As the medium continues to flow in, the medium pressure gradually increases. When the medium pressure exceeds the elastic force of the support spring 10, the medium will push the semi-circular valve core 5 to move away from the feed pipe 3. The movement of the semi-circular valve core 5 causes the mating cylinder 9 fixed to it to slide on the outer wall of the cylinder 8. At the same time, it compresses the support spring 10 located inside the cylinder 8 and the mating cylinder 9. At this time, a gap is formed between the semi-circular valve core 5 and the conical hole 6. The medium flows through this gap to the other end of the valve seat 1 and finally flows out from the discharge pipe 2, realizing the forward flow of the medium. When the medium stops flowing or shows a tendency to flow in reverse, the medium pressure decreases. At this time, the compressed support spring 10 begins to return to its original state, and its elastic force pushes the semi-circular valve core 5 to move closer to the feed pipe 3. The mating cylinder 9 also slides in the opposite direction on the outer wall of the cylinder 8 as the semi-circular valve core 5 moves. Finally, the semi-circular valve core 5 fits tightly with the conical hole 6. Because the conical structure of the conical hole 6 matches the semi-circular valve core 5, a good seal is formed, preventing the reverse flow of the medium and realizing the check valve function.

[0024] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A check valve for preventing particulate erosion, comprising a valve seat (1), characterized in that: A feed pipe (3) is installed at one end of the valve seat (1), and a tapered guide pipe (4) is installed on the inner wall of the feed pipe (3). A tapered hole (6) is opened inside the valve seat (1), and a semi-circular valve core (5) is installed inside the tapered hole (6). A cross plate (7) is installed inside the valve seat (1), and a support spring (10) is installed at one end of the cross plate (7).

2. The check valve against particulate erosion according to claim 1, characterized in that: The tapered end of the tapered guide tube (4) is located inside the tapered hole (6), and the other end of the support spring (10) is fixed to one end of the semi-circular valve core (5).

3. The check valve against particulate erosion according to claim 1, characterized in that: A cylinder (8) is installed at one end of the cross-shaped circular plate (7), and a matching cylinder (9) is slidably installed on the outer wall of the cylinder (8).

4. The check valve against particulate erosion according to claim 3, characterized in that: One end of the fitting cylinder (9) is fixed to one end of the semi-circular valve core (5), and the support spring (10) is located inside the cylinder (8) and the fitting cylinder (9).

5. A check valve for preventing particulate erosion according to claim 3, characterized in that: The other end of the fitting cylinder (9) is equipped with a first ring gasket (11), and the other end of the cylinder (8) is equipped with a second ring gasket (12).

6. A check valve for preventing particulate erosion according to claim 5, characterized in that: The inner wall of the first annular pad (11) is in contact with the outer wall of the cylinder (8), and the outer wall of the second annular pad (12) is in contact with the inner wall of the mating cylinder (9).

7. The check valve against particulate erosion according to claim 1, characterized in that: A discharge pipe (2) is installed at the other end of the valve seat (1).

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