Anti-leak structure of check valve

Abstract

The utility model discloses a kind of anti-leakage structures of check valve, it is related to check valve technical field, and the utility model includes valve body, the both sides of valve body are symmetrically equipped with connecting pipe, and the outer end part of one connecting pipe is equipped with access pipe, the outer end part of connecting pipe is fixedly equipped with connecting inner ring, the inner end part of access pipe is fixedly equipped with access inner ring, and access inner ring and connecting inner ring are movably attached between, the outer surface of connecting pipe and access pipe is jointly sleeved with upper sealing half ring and lower sealing half ring, the inner surface of upper sealing half ring and lower sealing half ring is respectively fixedly equipped with upper sealing filling ring and lower sealing filling ring, a kind of anti-leakage structures of check valve provided by the utility model, by the attachment of access inner ring and connecting inner ring, and the attachment of upper and lower sealing filling ring respectively with access inner ring and connecting inner ring, multiple sealing structure is formed, the sealing property of connecting portion is greatly improved, effectively prevent medium leakage.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, specifically to a leak-proof structure for a check valve. Background Technology

[0002] A check valve is a type of valve used in pipeline systems. Its main function is to prevent the backflow of media (such as liquids and gases) in the pipeline, ensuring that the media can only flow in one direction. The main function of a check valve is to ensure unidirectional flow of the media and prevent backflow. Good sealing is the key to achieving this function. Only by preventing leakage can the entire system be ensured to operate stably according to the designed process flow, so that various equipment and links can work in an orderly and coordinated manner.

[0003] However, existing technologies still have the following problems:

[0004] Existing check valve pipeline connection leak-proof structures are mostly difficult to achieve both easy installation and good sealing performance, requiring complex operations. Some installation methods even require on-site welding or thread processing, which is not only time-consuming and labor-intensive, but may also affect the connection quality due to the on-site operating environment. Furthermore, most check valves only use a simple single sealing surface design at the connection, such as relying solely on a single layer of rubber gasket at the connection between the valve body and the pipeline. This single sealing structure suffers significant reduction in sealing performance under complex operating conditions, such as pressure fluctuations and media corrosion.

[0005] To address the aforementioned problems, the inventors proposed a leak-proof structure for a check valve. Utility Model Content

[0006] To address the challenge of achieving both easy installation and good sealing at the pipe connection point of a check valve, this invention aims to provide a leak-proof structure for check valves.

[0007] To solve the above technical problems, the present invention adopts the following technical solution: a leak-proof structure for a check valve, comprising a valve body, wherein connecting pipes are symmetrically arranged on both sides of the valve body, and an inlet pipe is provided at the outer end of one of the connecting pipes; a connecting inner ring is fixedly provided at the outer end of the connecting pipe, and an inlet inner ring is fixedly provided at the inner end of the inlet pipe, and the inlet inner ring and the connecting inner ring are movably fitted together; an upper sealing half ring and a lower sealing half ring are sleeved together on the outer surfaces of the connecting pipe and the inlet pipe; an upper sealing filling ring and a lower sealing filling ring are respectively fixedly provided on the inner surfaces of the upper sealing half ring and the lower sealing half ring, and the upper sealing filling ring and the lower sealing filling ring are movably fitted together, and the inner surfaces of the upper sealing filling ring and the lower sealing filling ring are movably fitted with the inlet inner ring and the connecting inner ring.

[0008] Preferably, an upper connecting plate and a lower connecting plate are symmetrically fixed on both sides of the upper sealing half ring and the lower sealing half ring, and the corresponding lower connecting plate and the upper connecting plate are movably fitted together. A stud is threaded through the upper connecting plate and the lower connecting plate on one side, and a knob is fixedly provided at the upper end of the stud. A nut is threaded onto the lower end of the stud.

[0009] Preferably, the outer surface of the connecting pipe is symmetrically fixed with connecting blocks, the outer surface of the access pipe is symmetrically fixed with access blocks, both sides of the upper sealing half ring and the lower sealing half ring are symmetrically fixed with fixing blocks, and the fixing blocks are connected to the corresponding connecting blocks or access blocks by bolts. Both sides of the upper sealing half ring and the lower sealing half ring are symmetrically provided with slots, and the connecting blocks and access blocks are locked in the corresponding slots.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. This utility model forms a multi-seal structure by fitting the inner ring and the connecting inner ring together, and by fitting the upper and lower sealing filling rings together with the inner ring and the connecting inner ring respectively. This greatly improves the sealing performance of the connection and effectively prevents media leakage. At the same time, the connecting pipe and the connecting pipe are connected by the slot of the locking block and the sealing half ring, and the fixing block is connected to the locking block by bolts. The installation process is simple and convenient, and disassembly is also convenient when maintenance or replacement of parts is required, which reduces installation and maintenance costs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is an exploded view of the connection between the connecting pipe and the inlet pipe and the sealing semi-ring of this utility model.

[0015] Figure 3 This is an exploded view of the cross-section of one of the upper connecting plates and the related structure of the sealing semi-ring of this utility model.

[0016] In the diagram: 1. Valve body; 2. Connecting pipe; 21. Connecting inner ring; 22. Connecting block; 23. Slot; 24. Fixing block; 3. Inlet pipe; 31. Inlet inner ring; 32. Inlet block; 4. Upper sealing half ring; 41. Upper sealing filler ring; 42. Upper connecting plate; 43. Stud; 44. Knob; 45. Nut; 46. Reinforcing block; 5. Lower sealing half ring; 51. Lower sealing filler ring; 52. Lower connecting plate; 53. Block groove; 54. Block groove. Detailed Implementation

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

[0018] Example: Figure 1-3 As shown, this utility model provides a leak-proof structure for a check valve, including a valve body 1. The valve body 1 is made of high-strength cast steel, which has good pressure resistance and corrosion resistance, and can withstand high pressure and complex media environments in pipelines. The valve body 1 is a common check valve and is a mature existing technology, so it will not be described in detail here. Connecting pipes 2 are symmetrically arranged on both sides of the valve body 1, and one of the connecting pipes 2 has an inlet pipe 3 at its outer end. A connecting inner ring 21 is fixedly provided at the outer end of the connecting pipe 2, and an inlet inner ring 31 is fixedly provided at the inner end of the inlet pipe 3. The inlet inner ring 31 and the connecting inner ring 21 are movably fitted together. An upper sealing half ring 4 and a lower sealing half ring 5 are sleeved on the outer surfaces of the connecting pipe 2 and the inlet pipe 3. The inner surfaces of the upper sealing half-ring 4 and the lower sealing half-ring 5 are respectively fixed with an upper sealing filling ring 41 and a lower sealing filling ring 51. The upper sealing filling ring 41 and the lower sealing filling ring 51 are movably fitted together, and the inner surfaces of the upper sealing filling ring 41 and the lower sealing filling ring 51 are movably fitted with the access inner ring 31 and the connecting inner ring 21. The upper and lower sealing filling rings 41 and 51 are made of soft and wear-resistant nitrile rubber to ensure that an effective seal can be formed on each contact surface. The upper sealing half-ring 4 and the lower sealing half-ring 5 are together sleeved on the outside of the connecting pipe 2 and the access pipe 3, so that the upper sealing filling ring 41 and the lower sealing filling ring 51 are respectively fitted with the access inner ring 31 and the connecting inner ring 21, forming the first line of sealing defense.

[0019] An upper connecting plate 42 and a lower connecting plate 52 are symmetrically fixed on both sides of the upper sealing half ring 4 and the lower sealing half ring 5, respectively. The corresponding lower connecting plate 52 and the upper connecting plate 42 are movably fitted together. A stud 43 is threaded through the upper connecting plate 42 and the lower connecting plate 52 on one side. A knob 44 is fixedly fixed at the upper end of the stud 43, and a nut 45 is threadedly sleeved at the lower end of the stud 43. A reinforcing block 46 is fixedly provided on the upper surface of the upper connecting plate 42 and the lower surface of the lower connecting plate 52. The stud 43 is threadedly sleeved with the corresponding reinforcing block 46. A block groove 53 is symmetrically opened on the upper surface of the lower connecting plate 52, and an insert 54 is symmetrically opened on the lower surface of the upper connecting plate 42. The insert 54 is locked in the corresponding block groove 53. The upper connecting plate 42 and the lower connecting plate 52 on both sides of the sealing half rings 4 and 5 are fitted together. By rotating the knob 44, the stud 43 is rotated, so that the lower end of the stud 43 is threadedly connected to the nut 45. Gradually tightening the stud 43 applies pressure to the upper sealing half ring 4 and the lower sealing half ring 5, causing the upper sealing filling ring 41 and the lower sealing filling ring 51 to fit tightly into the inner ring 31 and the connecting inner ring 21, thereby enhancing the sealing effect. During the tightening process, the insert block 54 of the upper connecting plate 42 is inserted into the block groove 53 of the lower connecting plate 52, which plays a role in positioning and preventing the upper and lower connecting plates 42 and 52 from rotating relative to each other. At the same time, the reinforcing block 46 supports and reinforces the stud 43, ensuring that the tightening force can be stably transmitted, so that the two sealing half rings can better perform their sealing function.

[0020] Connecting blocks 22 are symmetrically fixed on the outer surface of connecting pipe 2, and connecting blocks 32 are symmetrically fixed on the outer surface of connecting pipe 3. Fixing blocks 24 are symmetrically fixed on both sides of the upper sealing half-ring 4 and the lower sealing half-ring 5, and the fixing blocks 24 are connected to the corresponding connecting blocks 22 or connecting blocks 32 by bolts. Grooves 23 are symmetrically opened on both sides of the upper sealing half-ring 4 and the lower sealing half-ring 5, and the connecting blocks 22 and connecting blocks 32 are locked in the corresponding grooves 23. The connecting pipes 2 on both sides of the valve body 1 are connected to the connecting inner ring 3 of the connecting pipe 3 via connecting inner ring 21. 1. Fitting and initial positioning: The upper sealing half-ring 4 and the lower sealing half-ring 5 are fitted together on the outside of the connecting pipe 2 and the access pipe 3, so that the upper sealing filling ring 41 and the lower sealing filling ring 51 fit with the access inner ring 31 and the connecting inner ring 21 respectively, forming the first sealing line. At the same time, the connecting block 22 on the connecting pipe 2 and the access block 32 on the access pipe 3 are respectively inserted into the slots 23 on both sides of the upper sealing half-ring 4 and the lower sealing half-ring 5, and are further fixed in position by bolts to the connecting block 22 or the access block 32 through the fixing block 24.

[0021] Working principle: The connecting pipes 2 on both sides of the valve body 1 are initially positioned by fitting the connecting inner ring 21 with the access inner ring 31 of the access pipe 3. The upper sealing half ring 4 and the lower sealing half ring 5 are fitted together on the outside of the connecting pipe 2 and the access pipe 3, so that the upper sealing filling ring 41 and the lower sealing filling ring 51 are respectively fitted with the access inner ring 31 and the connecting inner ring 21, forming the first line of sealing defense. At the same time, the connecting block 22 on the connecting pipe 2 and the access block 32 on the access pipe 3 are respectively inserted into the slots 23 on both sides of the upper sealing half ring 4 and the lower sealing half ring 5, and are further fixed by bolts to the connecting block 22 or the access block 32 through the fixing block 24, thereby fixing the position of the upper and lower sealing half rings 4 and 5. The fitting of the access inner ring 31 with the connecting inner ring 21, and the fitting of the upper and lower sealing filling rings 41 and 51 with the access inner ring 31 and the connecting inner ring 21 respectively, form a multi-seal structure, which greatly improves the sealing performance of the connection and effectively prevents media leakage.

[0022] The upper connecting plates 42 and lower connecting plates 52 on both sides of the upper and lower sealing semi-rings 4 and 5 are fitted together. By rotating the knob 44, the stud 43 is rotated, so that the lower end of the stud 43 is threadedly connected to the nut 45. Gradually tightening the stud 43 applies pressure to the upper sealing semi-ring 4 and the lower sealing semi-ring 5, causing the upper sealing filling ring 41 and the lower sealing filling ring 51 to fit tightly into the inner ring 31 and the connecting inner ring 21, enhancing the sealing effect. During the tightening process, the insert block 54 of the upper connecting plate 42 is inserted into the block groove 53 of the lower connecting plate 52, thus... The upper and lower connecting plates 42 and 52 are positioned and prevent relative rotation. At the same time, the reinforcing block 46 supports and reinforces the stud 43, ensuring that the tightening force can be stably transmitted, so that the two sealing half rings can better perform their sealing function. The upper and lower connecting plates 41 and 51 are connected by the stud 43 and the nut 45, and are positioned by the insert block 54 and the slot 53, as well as supported by the reinforcing block. During the tightening process, pressure can be stably applied to the sealing half rings to ensure the stability and reliability of the sealing effect and avoid sealing failure due to loosening.

[0023] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A leak-proof structure for a check valve, comprising a valve body (1), characterized in that: The valve body (1) is symmetrically provided with connecting pipes (2) on both sides, and one of the connecting pipes (2) is provided with an access pipe (3) at its outer end. The outer end of the connecting pipe (2) is fixedly provided with a connecting inner ring (21), and the inner end of the access pipe (3) is fixedly provided with an access inner ring (31). The access inner ring (31) and the connecting inner ring (21) are movably fitted together. The outer surfaces of the connecting pipe (2) and the access pipe (3) are jointly fitted with an upper sealing half ring (4) and a lower sealing half ring (5). The inner surfaces of the upper sealing half ring (4) and the lower sealing half ring (5) are respectively fixedly provided with an upper sealing filling ring (41) and a lower sealing filling ring (51).

2. The anti-leakage structure of a check valve as described in claim 1, characterized in that: The outer surface of the connecting pipe (2) is symmetrically fixed with connecting blocks (22), the outer surface of the access pipe (3) is symmetrically fixed with access blocks (32), and both sides of the upper sealing half ring (4) and the lower sealing half ring (5) are symmetrically fixed with fixing blocks (24), and the fixing blocks (24) are connected to the corresponding connecting blocks (22) or access blocks (32) by bolts.

3. The anti-leakage structure of a check valve as described in claim 1, characterized in that: The upper sealing filler ring (41) and the lower sealing filler ring (51) are movably fitted together, and the inner surfaces of the upper sealing filler ring (41) and the lower sealing filler ring (51) are movably fitted together with the access inner ring (31) and the connecting inner ring (21).

4. The anti-leakage structure of a check valve as described in claim 1, characterized in that: The upper sealing half ring (4) and the lower sealing half ring (5) are respectively symmetrically fixed with an upper connecting plate (42) and a lower connecting plate (52), and the corresponding lower connecting plate (52) and upper connecting plate (42) are movably fitted together.

5. The anti-leakage structure of a check valve as described in claim 4, characterized in that: A stud (43) is threaded through the upper connecting plate (42) and the lower connecting plate (52) on one side, and a knob (44) is fixedly provided at the upper end of the stud (43), and a nut (45) is threaded onto the lower end of the stud (43).

6. The anti-leakage structure of a check valve as described in claim 5, characterized in that: The upper surface of the upper connecting plate (42) and the lower surface of the lower connecting plate (52) are both fixedly provided with reinforcing blocks (46), and the studs (43) are threadedly connected to the corresponding reinforcing blocks (46).

7. The anti-leakage structure of a check valve as described in claim 4, characterized in that: The upper surface of the lower connecting plate (52) is symmetrically provided with block grooves (53), and the lower surface of the upper connecting plate (42) is symmetrically provided with inserts (54), and the inserts (54) are engaged in the corresponding block grooves (53).

8. The anti-leakage structure of a check valve as described in claim 2, characterized in that: Both sides of the upper sealing half ring (4) and the lower sealing half ring (5) are symmetrically provided with slots (23), and the connecting block (22) and the access block (32) are both locked in the corresponding slots (23).

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