A combined check valve convenient to disassemble

Abstract

This utility model discloses a modular check valve that is easy to disassemble, relating to the field of check valve technology. It includes a valve body with a first connecting mechanism installed on one side and a second connecting mechanism installed on the other side. Through the synergistic action of a sliding sleeve, a limiting block, a spring, and a limiting ball, this utility model achieves rapid docking, precise positioning, and reliable locking. During the connection process, it features automatic reset and mechanical limiting functions, ensuring that the second connecting pipe can be stably fixed after being inserted into the first connecting pipe. Flange fitting and bolt tightening further enhance sealing and pressure resistance. Simultaneously, disassembly is convenient; simply pushing the sliding sleeve releases the limiting structure, completing rapid separation. This significantly improves the assembly efficiency of the connecting components and the convenience of subsequent maintenance, making it suitable for working environments with high requirements for sealing and reusability.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, and in particular to a modular check valve that is easy to disassemble. Background Technology

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc, which relies on its own weight and the pressure of the medium to prevent backflow. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, reflux valve, or isolation valve. The valve disc movement is divided into lift type and swing type. A lift type check valve is structurally similar to a gate valve, except that it lacks the valve stem that drives the valve disc.

[0003] For example, CN204083386U discloses a check valve, which includes a valve body, an inlet and an outlet, a detachable inspection port cover on one side of the valve body, an auxiliary inspection port on the inlet side, and a rat cage shell inside the valve body. The upper end of the rat cage shell is connected to a check ball through an elastic component.

[0004] However, in the existing technology, check valves are prone to leakage or failure after long-term use due to problems such as wear on the sealing surface and blockage by impurities. If disassembly is difficult, maintenance personnel need to spend more time disassembling the pipeline or valve accessories, and may even need to cut the pipeline, which increases maintenance costs and downtime. Utility Model Content

[0005] The purpose of this utility model is to solve the problem that the maintenance of existing technologies requires more time to disassemble pipes or valve accessories, and even requires cutting pipes. Therefore, this utility model proposes a modular check valve that is easy to disassemble.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a modular check valve that is easy to disassemble, comprising a valve body, a first connecting mechanism installed on one side of the valve body, and a second connecting mechanism installed on one side of the first connecting mechanism;

[0007] The first connecting mechanism includes a first connecting pipe, a sliding sleeve is sleeved on the outer surface of the first connecting pipe, a limit block is fixedly connected to the inner side of the sliding sleeve, a through hole is opened on the outer surface of the first connecting pipe, a limit ball is slidably connected to the inner side of the through hole, and a first flange is fixedly connected to one end of the sliding sleeve.

[0008] The second connecting mechanism includes a second connecting pipe, one end of which is fixedly connected to a second flange, and a slot is formed on the outer surface of one end of the second connecting pipe. A second groove is formed on the inner side of the second connecting pipe, and a support bearing ring is engaged inside the second groove.

[0009] Preferably, the inner side of the first connecting pipe has an installation groove, and a sealing ring is snapped into the inner side of the installation groove.

[0010] Preferably, a sliding groove is provided on the outer surface of the first connecting pipe, and a spring is sleeved on the outer surface of the sliding groove.

[0011] Preferably, a first groove is formed on the outer surface of one end of the first connecting pipe, and a limit ring is engaged inside the first groove.

[0012] Preferably, the limiting block abuts against the limiting ring, and the surface of the first groove has multiple through holes.

[0013] Preferably, the limiting ball engages with the slot.

[0014] Preferably, one end of the spring abuts against the limiting block.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. In this utility model, through the synergistic effect of the sliding sleeve, the limiting block, the spring and the limiting ball, rapid docking, precise positioning and reliable locking are achieved. During the connection process, it has automatic reset and mechanical limiting functions to ensure that the second connecting pipe can be stably fixed after being inserted into the first connecting pipe. The flange fit and bolt tightening further improve the sealing performance and pressure bearing capacity. At the same time, the disassembly operation is convenient. Only by pushing the sliding sleeve can the limiting structure be released and rapid separation can be completed. It significantly improves the assembly efficiency of the connecting components and the convenience of subsequent maintenance. It is suitable for working environments with high requirements for sealing performance and reusability.

[0017] 2. In this utility model, the sealing ring and the second connecting pipe are tightly fitted together to effectively prevent gas or liquid leakage and enhance the system's airtightness; the limiting ring restricts the movement range of the sliding sleeve to prevent structural loosening due to operation or vibration and ensure connection safety; the support bearing ring provides stable circumferential support and guidance to ensure the coaxial operation of the connecting pipe and resist external impact. The overall structure not only ensures the sealing effect but also has good pressure resistance and buffering capacity, significantly extending service life and improving reliability. Attached Figure Description

[0018] Figure 1 This utility model provides a schematic diagram of the overall three-dimensional structure of a modular check valve that is easy to disassemble.

[0019] Figure 2 This utility model provides a three-dimensional structural diagram of a modular check valve that is easy to disassemble.

[0020] Figure 3 A cross-sectional view of a modular check valve that is easy to disassemble is provided for this utility model.

[0021] Figure 4 This utility model presents a cross-sectional three-dimensional structural diagram of a modular check valve that is easy to disassemble.

[0022] Legend: 1. Valve body; 2. First connecting mechanism; 21. First connecting pipe; 211. Mounting groove; 212. Sliding groove; 22. Sliding sleeve; 221. Limiting block; 23. First flange; 24. First groove; 25. Limiting ring; 26. Through hole; 27. Spring; 28. Limiting ball; 29. ​​Sealing ring; 3. Second connecting mechanism; 31. Second connecting pipe; 32. Second flange; 33. Second groove; 34. Support bearing ring; 35. Slot. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] Example 1: As Figures 1-4 As shown, this utility model provides a modular check valve that is easy to disassemble, including a valve body 1, a first connecting mechanism 2 installed on one side of the valve body 1, and a second connecting mechanism 3 installed on one side of the first connecting mechanism 2.

[0026] The first connecting mechanism 2 includes a first connecting pipe 21, a sliding sleeve 22 sleeved on the outer surface of the first connecting pipe 21, a limiting block 221 fixedly connected to the inner side of the sliding sleeve 22, a through hole 26 opened on the outer surface of the first connecting pipe 21, a limiting ball 28 slidably connected to the inner side of the through hole 26, and a first flange 23 fixedly connected to one end of the sliding sleeve 22.

[0027] The second connecting mechanism 3 includes a second connecting pipe 31, one end of which is fixedly connected to a second flange 32, and a slot 35 is provided on the outer surface of one end of the second connecting pipe 31. A second groove 33 is provided on the inner side of the second connecting pipe 31, and a support bearing ring 34 is engaged on the inner side of the second groove 33.

[0028] The specific settings and functions of this embodiment are described below. During the connection operation, one end of the second connecting tube 31 is first inserted axially into the inside of the first connecting tube 21, so that the two tubes are aligned on the same axis. To ensure the stability and positioning accuracy of the insertion process, the sliding sleeve 22 is first pushed to move axially. At this time, the limiting block 221 set inside the sliding sleeve 22 will apply a compressive force to the spring 27 during the movement, so that the spring 27 is in a compressed state, forming a preload.

[0029] After the second connecting tube 31 is fully inserted into the first connecting tube 21 to the predetermined position, the sliding sleeve 22 is released. At this time, the spring 27, under the action of releasing elastic potential energy, pushes the limiting block 221 to move in the opposite direction, so that it is locked into the originally set limiting position. The reset action of the limiting block 221 will drive the sliding sleeve 22 to return to its initial state, and at the same time achieve the initial mechanical limiting of the second connecting tube 31.

[0030] At this time, the second flange 32 at the end of the second connecting pipe 31 contacts and aligns with the first flange 23 at the end of the first connecting pipe 21. The surfaces of the second flange 32 and the first flange 23 are machined to form a tight fit. Furthermore, the limiting ball 28, located inside the through hole 26, is also pushed into the groove 35 located on the outer wall of the second connecting pipe 31 during this process, achieving axial locking of the second connecting pipe 31. The limiting ball 28 can slide freely within the through hole 26, but it automatically engages when the groove 35 is present, achieving reliable positioning.

[0031] To further enhance connection strength and sealing performance, bolts can be inserted into the multiple through holes 26 on the first flange 23 and the second flange 32 and tightened with nuts for secure locking. This structure not only achieves mechanical fit and rapid assembly but also improves the structural stability and pressure-bearing capacity of the interface.

[0032] During subsequent disassembly or maintenance, simply push the sliding sleeve 22 again to shift the limit block 221, thereby releasing the constraint on the limit ball 28 and allowing the limit ball to move freely and exit the slot 35. At this point, the second connecting pipe 31 can be easily separated from the first connecting pipe 21. The operation is simple and quick, which is conducive to rapid on-site disassembly and maintenance.

[0033] Example 2: Figures 2-4 As shown, the first connecting pipe 21 has an installation groove 211 on its inner side, and a sealing ring 29 is engaged inside the installation groove 211. The outer surface of the first connecting pipe 21 has a sliding groove 212, and a spring 27 is sleeved on the outer surface of the sliding groove 212. One end of the outer surface of the first connecting pipe 21 has a first groove 24, and a limiting ring 25 is engaged inside the first groove 24. A limiting block 221 abuts against the limiting ring 25. Multiple through holes 26 are formed on the surface of the first groove 24. A limiting ball 28 engages with a slot 35. One end of the spring 27 abuts against the limiting block 221.

[0034] The overall effect of this embodiment is that, after connection, the sealing ring 29 inside the mounting groove 211 can precisely abut against one end of the second connecting pipe 31, thereby forming a sealed structure at the connection point, achieving a good sealing effect, preventing gas or liquid leakage at the joint, and improving the sealing performance and reliability of the entire system. At the same time, this sealing structure still possesses a certain degree of buffering and adaptability when facing pressure fluctuations or slight offsets, effectively extending the service life of the seals.

[0035] The retaining ring 25 engages within the first groove 24, effectively limiting the axial movement range of the retaining block 221, thereby further restricting the travel of the sliding sleeve 22. This retaining structure prevents the sliding sleeve 22 from accidentally slipping out during operation or vibration, avoiding separation between the sliding sleeve 22 and the first connecting pipe 21, thus improving the stability and safety of the structure. Furthermore, the presence of the retaining ring 25 also facilitates positioning memory during maintenance or replacement, simplifying assembly steps.

[0036] A support bearing ring 34 is installed inside the second groove 33, which provides circumferential support and axial guidance for the second connecting pipe 31, ensuring its stability and coaxiality during use. This support bearing ring 34 not only improves the overall strength of the connection, preventing loosening or displacement due to load or vibration, but also effectively disperses externally applied forces, thus protecting the connecting pipe from deformation or fatigue damage, further enhancing the durability and reliability of the entire connection structure.

[0037] The method of use and working principle of this device are as follows: During connection, one end of the second connecting tube 31 is inserted into the inside of the first connecting tube 21. During the connection process, the sliding sleeve 22 is first pushed, causing the limiting block 221 inside to compress the spring 27, forming a pre-tightened state. After the second connecting tube 31 is fully inserted into the first connecting tube 21, the sliding sleeve 22 is released, and the elasticity of the spring 27 causes the limiting block 221 to move in the opposite direction, thereby pushing the first flange 23 and the second flange 32 to fit together. At this time, the limiting ball 28 in the through hole 26 will automatically engage with the inside of the slot 35, achieving reliable locking of the position of the second connecting tube 31.

[0038] Subsequently, the first flange 23 can be connected to the through hole 26 of the second flange 32 using bolts and nuts, further enhancing the overall structural stability and achieving a quick and reliable connection. The limiting ball 28 can slide within the through hole 26. When disassembly is required, simply move the sliding sleeve 22 again to remove the limiting block 221 from restricting the movement of the limiting ball 28, allowing the limiting ball 28 to disengage from the slot 35, thereby quickly separating the second connecting pipe 31 from the first connecting pipe 21, facilitating subsequent disassembly and maintenance operations.

[0039] After the connection is completed, the sealing ring 29 inside the mounting groove 211 will make tight contact with one end of the second connecting pipe 31 to form a sealing interface, effectively preventing media leakage and improving the sealing performance of the system. The limiting ring 25 provided in the first groove 24 is used to limit the movement range of the limiting block 221, thereby controlling the movement stroke of the sliding sleeve 22, preventing the sliding sleeve 22 from accidentally disengaging from the first connecting pipe 21, and improving the safety and stability of the connection.

[0040] Meanwhile, a support bearing ring 34 is installed inside the second groove 33 to provide effective support for the second connecting pipe 31, ensuring its structural strength and coaxial stability during use, preventing loosening or deformation due to external forces or vibrations, thereby ensuring the overall connection system is firm and reliable.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present 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 the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A modular check valve that is easy to disassemble, comprising a valve body (1), characterized in that: A first connecting mechanism (2) is installed on one side of the valve body (1), and a second connecting mechanism (3) is installed on one side of the first connecting mechanism (2); The first connecting mechanism (2) includes a first connecting pipe (21), a sliding sleeve (22) is sleeved on the outer surface of the first connecting pipe (21), a limit block (221) is fixedly connected to the inner side of the sliding sleeve (22), a through hole (26) is opened on the outer surface of the first connecting pipe (21), a limit ball (28) is slidably connected to the inner side of the through hole (26), and a first flange (23) is fixedly connected to one end of the sliding sleeve (22). The second connecting mechanism (3) includes a second connecting pipe (31), one end of which is fixedly connected to a second flange (32), and a slot (35) is provided on the outer surface of one end of the second connecting pipe (31), and a second groove (33) is provided on the inner side of the second connecting pipe (31), and a support bearing ring (34) is engaged on the inner side of the second groove (33).

2. The easily disassembled combined check valve according to claim 1, characterized in that: The first connecting pipe (21) has an installation groove (211) on its inner side, and a sealing ring (29) is snapped into the inner side of the installation groove (211).

3. The easily disassembled combined check valve according to claim 1, characterized in that: The outer surface of the first connecting pipe (21) is provided with a sliding groove (212), and a spring (27) is sleeved on the outer surface of the sliding groove (212).

4. The easily disassembled combined check valve according to claim 1, characterized in that: A first groove (24) is provided on the outer surface of one end of the first connecting tube (21), and a limit ring (25) is engaged inside the first groove (24).

5. A modular check valve for easy disassembly according to claim 4, characterized in that: The limiting block (221) abuts against the limiting ring (25), and the surface of the first groove (24) is provided with multiple through holes (26).

6. A modular check valve for easy disassembly according to claim 3, characterized in that: The limiting ball (28) engages with the slot (35).

7. A modular check valve for easy disassembly according to claim 3, characterized in that: One end of the spring (27) abuts against the limiting block (221).

Images