A one-way valve with backflow detection and backflow prevention functions

Abstract

The present invention relates to the technical field of valves, and discloses a one-way valve with backflow detection and anti-backflow functions. The design includes a one-way valve assembly and a detection assembly arranged on the one-way valve assembly. The detection assembly is used to detect the reverse leakage of the one-way valve assembly. The one-way valve assembly includes a valve body, a valve core and a sealing sleeve assembly. The sealing sleeve assembly includes a first sealing sleeve and a second sealing sleeve. The two ends of the valve core fix the valve core in the connecting pipe through a support assembly. The valve core is provided with a conical surface. The reverse sealing of the one-way valve is completed by the mutual cooperation of the valve core and the sealing sleeve assembly. The sealing sleeve assembly includes a first sealing sleeve and a second sealing sleeve. A better backflow effect is achieved through the double-layer sleeve structure, which not only effectively improves the anti-backflow effect of the one-way valve, but also the double-layer sealing sleeve structure can effectively ensure that the one-way valve maintains a reverse sealing effect under pressure fluctuations on both sides of the one-way valve.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a one-way valve with backflow detection and backflow prevention functions. Background Art

[0002] A check valve is a valve that controls the flow of fluid in a fluid pipeline to only one direction. Through the application of a check valve, the fluid can flow along a specific pipeline channel in a complex pipeline. The working principle of the check valve is based on the difference in fluid pressure. When the fluid tries to flow in from the designated outlet in the opposite direction, the valve will automatically close to prevent the backflow of the fluid. In a set of fluid pipelines, there are often multiple check valves. The airtightness of the check valve is also extremely important. A check valve with poor sealing effect is prone to backflow. This type of check valve often cannot ensure constant liquid pressure or gas pressure in the fluid pipeline after reverse throttling. This type of check valve often cannot work normally or cannot meet the working requirements of the hydraulic system.

[0003] Moreover, after a certain period of use, the one-way valve is prone to damage due to blockage or wear, resulting in serious backflow. The existing one-way valve does not have the function of monitoring its own backflow. At present, when detecting whether the one-way valve is damaged, it is necessary to manually remove the one-way valve from the oil circuit and then test the removed one-way valve to determine whether the one-way valve is damaged. The whole process is time-consuming and laborious. Usually, the one-way valve with problems can be found according to the situation of the oil circuit after the pressure of the oil circuit is found. At this time, a more serious backflow has already occurred. Summary of the invention

[0004] The object of the present invention is to provide a one-way valve with backflow detection and backflow prevention functions, so as to solve the problem that the existing one-way valve is easy to backflow and the backflow situation cannot be discovered in time.

[0005] The present invention is achieved through the following technical solutions:

[0006] A one-way valve with backflow detection and backflow prevention functions comprises a one-way valve assembly and a detection assembly arranged on the one-way valve assembly, wherein the detection assembly is used to detect reverse leakage of the one-way valve assembly, wherein the one-way valve assembly comprises a valve body, a valve core and a sealing sleeve assembly, wherein the valve body comprises a main body and a detection device installation portion, wherein a connecting pipe is provided in the main body, wherein an installation cavity for accommodating the detection assembly is provided in the detection device installation portion, wherein the sealing sleeve assembly is slidingly provided near the installation cavity in the connecting pipe, wherein the sealing sleeve assembly comprises a first sealing sleeve and a second sealing sleeve, wherein the two ends of the valve core fix the valve core in the connecting pipe through a support assembly, wherein a conical surface is provided on the valve core, wherein the first sealing sleeve and the second sealing sleeve are both provided with conical surface features for cooperating with the conical surface to realize sealing, wherein the first sealing sleeve is slidingly matched with the second sealing sleeve in the second sealing sleeve, wherein an end of the first sealing sleeve close to the outlet of the one-way valve is also connected to the second sealing sleeve through a first spring, and a leakage detection cavity is provided between the first sealing sleeve and the second sealing sleeve.

[0007] In one possible design, the detection component includes two liquid inlets, and the valve body is also provided with a first connecting hole and a second connecting hole. When the one-way valve assembly is in a one-way sealing state, the leakage detection chamber is connected to one liquid inlet of the detection component through the second connecting hole, and the other liquid inlet of the detection component is connected to the chamber inside the inlet end of the one-way valve through the first connecting hole. The detection component determines whether a leakage occurs by comparing the pressures of the two liquid inlets.

[0008] In a possible design, the second sealing sleeve is fixedly connected to the first balancing sleeve at the inlet end, and the second sealing sleeve is fixedly connected to the second balancing sleeve at the outlet end. The second balancing sleeve has the same cross-sectional area as the first balancing sleeve, and the cross-sectional area is equal to the cross-sectional area of ​​the sleeve connection section between the second sealing sleeve and the first sealing sleeve. The first balancing sleeve cooperates with the first support to form an inlet chamber, and the second balancing sleeve cooperates with the second support to form an outlet chamber. The inlet chamber is connected to the outside through a vent hole, and the outlet chamber is connected to the outside through another vent hole.

[0009] In one possible design, the detection assembly includes a detector housing, a pressure detection chamber arranged in the detector housing and connected to two liquid inlets, a compression spring, a piston and an abutment column arranged in the pressure detection chamber, the piston is slidably arranged in the pressure detection chamber, the abutment column is fixed to one end of the piston close to the second connecting hole, the compression spring is arranged at one end of the piston close to the first connecting hole, the compression spring pushes the piston to abut the abutment column through elastic force, and a proximity sensor is also fixed in the detector housing, and the proximity sensor can detect the distance from the piston to itself.

[0010] In a possible design, the support assembly includes a first support and a second support, the valve core and the first support are processed as one piece, and an end of the valve core away from the first support is supported and fixed by the second support.

[0011] In a possible design, the elastic force of the second spring needs to be greater than the sum of the elastic force of the first spring, the second sealing sleeve, the first balancing sleeve, and the sliding friction of the second balancing sleeve.

[0012] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0013] The present invention completes the reverse sealing of the one-way valve through the cooperation between the valve core and the sealing sleeve assembly. The sealing sleeve assembly includes a first sealing sleeve and a second sealing sleeve. A better backflow effect is achieved through the double-layer sleeve structure, which not only effectively improves the anti-backflow effect of the one-way valve, but also the double-layer sealing sleeve structure can effectively ensure that the one-way valve maintains a reverse sealing effect under pressure fluctuations on both sides of the one-way valve, thereby improving the anti-pressure fluctuation effect of the one-way valve during reverse sealing. At the same time, a leakage detection chamber is designed between the sleeves on both sides. The reverse leakage of the one-way valve can be effectively detected through the cooperation between the leakage detection chamber and the detection assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0016] Figure 2 A half-section diagram of an embodiment of the present invention;

[0017] Figure 3 For the embodiment of the present invention Figure 2 In the enlarged view at A in the middle;

[0018] Figure 4 It is a schematic diagram of the structure of the second sealing sleeve and the first balancing sleeve in an embodiment of the present invention;

[0019] Figure 5 It is a schematic diagram of the structure of the second balancing sleeve in an embodiment of the present invention;

[0020] Figure 6 Schematic diagram of the structure of the detection component in an embodiment of the present invention.

[0021] The reference numerals represent: 1-valve body, 101-main body, 102-detection device installation part, 2-valve core, 3-sealing sleeve assembly, 301-first sealing sleeve, 302-second sealing sleeve, 4-first support, 5-detector housing, 6-proximity sensor, 7-compression spring, 8-piston, 9-abutment column, 10-first connecting hole, 11-second connecting hole, 12-first spring, 13-second spring, 14-second support, 15-second balancing sleeve, 16-first balancing sleeve, 17-vent, 18-leakage detection chamber. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0023] Examples, such as Figures 1 to 6 As shown, this embodiment includes a one-way valve assembly and a detection assembly arranged on the one-way valve assembly, the detection assembly is used to detect reverse leakage of the one-way valve assembly, the one-way valve assembly includes a valve body 1, a valve core 2 and a sealing sleeve assembly 3, the valve body 1 includes a main body 101 and a detection device installation part 102, a connecting pipe is provided in the main body 101, and a mounting cavity for accommodating the detection assembly is provided in the detection device installation part 102;

[0024] In the connecting pipe, the sealing sleeve assembly 3 is slidably provided near the installation cavity, and the sealing sleeve assembly 3 includes a first sealing sleeve 301 and a second sealing sleeve 302. The two ends of the valve core 2 fix the valve core 2 in the connecting pipe through a support assembly. The valve core 2 is provided with a conical surface, and the first sealing sleeve 301 and the second sealing sleeve 302 are both provided with conical surface features that cooperate with the conical surface to achieve sealing;

[0025] A leakage detection chamber 18 is provided between the first sealing sleeve 301 and the second sealing sleeve 302. The detection assembly includes two liquid inlets. The valve body 1 is also provided with a first connecting hole 10 and a second connecting hole 11. When the one-way valve assembly is in a one-way sealing state, the leakage detection chamber 18 is connected to one liquid inlet of the detection assembly through the second connecting hole 11, and the other liquid inlet of the detection assembly is connected to the chamber inside the inlet end of the one-way valve through the first connecting hole 10. The detection assembly determines whether a leakage occurs by comparing the pressures of the two liquid inlets.

[0026] The first sealing sleeve 301 is slidably matched with the second sealing sleeve 302 in the second sealing sleeve 302. The end of the first sealing sleeve 301 close to the one-way valve outlet is connected to the second sealing sleeve 302 through a first spring 12. During the sudden reverse closing process of the one-way valve assembly, the first spring 12 can ensure that the second sealing sleeve 302 first contacts the valve core 2 to form a reverse seal. The end of the second sealing sleeve 302 close to the one-way valve outlet is also provided with a second spring 13. The second spring 13 pushes the second sealing sleeve 302 so that the second sealing sleeve 302 cooperates with the valve core 2 to complete the closing of the valve. After the first sealing sleeve 301 is closed, the second sealing sleeve 302 cooperates with the valve core 2 to perform the next layer of sealing. The anti-backflow sealing effect of the one-way valve assembly can be effectively improved through double-layer sealing.

[0027] It should be noted that the first sealing sleeve 301 and the second sealing sleeve 302 cooperate with the valve core 2 to complete the closing of the valve in sequence. After the first sealing sleeve 301 cooperates with the valve core 2 to complete the reverse closing of the valve, the leakage detection chamber 18 and the inlet end of the one-way valve assembly are in the same pressure environment until the second sealing sleeve 302 cooperates with the valve core 2 to close again, which can effectively ensure that when there is no leakage at the first sealing sleeve 301, the liquid pressure of the leakage detection chamber 18 and the inlet end of the one-way valve assembly is the same. If a leakage occurs at the first sealing sleeve 301, the leakage detection chamber 18 and the inlet end of the one-way valve assembly are in the same pressure environment. The pressure in 18 will increase, so that the detection component can detect the leakage of the one-way valve through the pressure comparison of the two liquid inlets, thereby giving an alarm for reminder, and in the process of reverse closing, the first sealing sleeve 301 is always the structure that first maintains a tight closure with the valve core 2, and is also the structure that first withstands the impact. The sealing position of the first sealing sleeve 301 is more likely to have problems than the sealing position of the second sealing sleeve 302. Therefore, even if the leakage of the one-way valve is detected, it can still be guaranteed with a high probability that no reverse leakage occurs at the second sealing sleeve 302, thereby ensuring the anti-reverse leakage effect of the entire one-way valve.

[0028] Advantageously, after the first sealing sleeve 301 cooperates with the valve core 2 to form a seal, the movement of the second sealing sleeve 302 will cause the spatial volume of the inlet end and the outlet end to change, thereby causing a volume change. Therefore, in order to solve this problem, the second sealing sleeve 302 is fixedly connected to the first balancing sleeve 16 at the inlet end, and the second sealing sleeve 302 is fixedly connected to the second balancing sleeve 15 at the outlet end. The second balancing sleeve 15 has the same cross-sectional area as the first balancing sleeve 16, which is equal to the cross-sectional area of ​​the sleeve connection section between the second sealing sleeve 302 and the first sealing sleeve 301. The first balancing sleeve 16 cooperates with the first support 4 to form an inlet chamber, and the second balancing sleeve 15 cooperates with the second support 14 to form an outlet chamber. The inlet chamber is connected to the outside through the vent hole 17, and the outlet chamber is connected to the outside through another vent hole 17. After the first sealing sleeve 301 cooperates with the valve core 2 to form a one-way seal, the second sealing sleeve 302 moves toward the inlet end, which will drive the first balancing sleeve 16 and the second balancing sleeve 15 to move synchronously. When the second sealing sleeve 302 moves, the second sealing sleeve 302 increases a certain volume at the inlet end and reduces the same volume at the outlet end, and the first balancing sleeve 16 reduces the same volume at the inlet end driven by the second sealing sleeve 302, and the second balancing sleeve 15 increases the same volume at the outlet end, thereby ensuring that the movement of the second sealing sleeve 302 will not cause volume changes at both ends and will not change the pressure conditions at both ends.

[0029] In this embodiment, the detection assembly includes a detector housing 5, a pressure detection chamber arranged in the detector housing 5 and connected to the two liquid inlets, a compression spring 7, a piston 8 and an abutment column 9 arranged in the pressure detection chamber, the piston 8 is slidably arranged in the pressure detection chamber, the abutment column 9 is fixed to one end of the piston 8 close to the second connecting hole 11, the compression spring 7 is arranged at one end of the piston 8 close to the first connecting hole 10, the compression spring 7 pushes the piston 8 to abut against the abutment column 9 through elastic force, and a proximity sensor 6 is also fixed in the detector housing 5, and the proximity sensor 6 can detect the piston 8 to itself When the first sealing sleeve 301 leaks, the liquid in the leakage detection chamber 18 increases. When the liquid increases, the piston 8 is pushed to approach the proximity sensor 6. When the piston 8 enters the detection range of the proximity sensor 6, the proximity sensor 6 starts to feedback and alarm. Compared with the existing method of arranging pressure sensors at both ends of the one-way valve to perform pressure detection to determine whether the one-way valve is leaking, the detection component used in this embodiment can be more accurate and will not be affected by the pressure fluctuations at both ends of the one-way valve. At the same time, the second sealing sleeve 302 is added, and the sealing of the one-way valve can be guaranteed even if a failure is detected at the first sealing sleeve 301.

[0030] In this embodiment, the support assembly includes a first support 4 and a second support 14. The valve core 2 and the first support 4 are processed as an integral unit to ensure the overall structural strength. To improve the stability of the valve core 2, the end of the valve core 2 away from the first support 4 is supported and fixed by the second support 14 to ensure that the valve core 2 is stably fixed inside the main body 101. The first support 4 and the second support 14 are also fixed inside the main body 101.

[0031] It should be noted that, in this embodiment, the elastic force of the second spring 13 needs to be greater than the sum of the elastic force of the first spring 12, the second sealing sleeve 302, the first balancing sleeve 16 and the sliding friction of the second balancing sleeve 15. The second spring 13 needs to overcome these forces to ensure that the second sealing sleeve 302 can cooperate with the valve core 2 to complete the reverse seal at another location.

[0032] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A one-way valve with backflow detection and backflow prevention functions, comprising a one-way valve assembly and a detection assembly arranged on the one-way valve assembly, characterized in that: The detection assembly is used to detect reverse leakage of a one-way valve assembly, the one-way valve assembly comprising a valve body (1), a valve core (2) and a sealing sleeve assembly (3), the valve body (1) comprising a main body (101) and a detection device installation portion (102), a connecting pipe is provided in the main body (101), and a mounting cavity for accommodating the detection assembly is provided in the detection device installation portion (102); The sealing sleeve assembly (3) is slidably provided in the connecting pipe near the installation cavity, the sealing sleeve assembly (3) comprising a first sealing sleeve (301) and a second sealing sleeve (302), the two ends of the valve core (2) being fixed in the connecting pipe by support assemblies, the valve core (2) being provided with a conical surface, and the first sealing sleeve (301) and the second sealing sleeve (302) are both provided with conical surface features cooperating with the conical surface to achieve sealing; The first sealing sleeve (301) is slidably matched with the second sealing sleeve (302) in the second sealing sleeve (302); an end of the first sealing sleeve (301) close to the outlet of the one-way valve is connected to the second sealing sleeve (302) via a first spring (12); and a leakage detection chamber (18) is provided between the first sealing sleeve (301) and the second sealing sleeve (302); A second spring (13) is also provided at one end of the second sealing sleeve (302) close to the outlet of the one-way valve, and the second spring (13) pushes the second sealing sleeve (302) so that the second sealing sleeve (302) cooperates with the valve core (2) to complete the closing of the valve; The detection assembly comprises two liquid inlets, and the valve body (1) is also provided with a first connecting hole (10) and a second connecting hole (11). When the one-way valve assembly is in a one-way sealing state, the leakage detection chamber (18) is connected to one of the liquid inlets of the detection assembly through the second connecting hole (11), and the other liquid inlet of the detection assembly is connected to the chamber inside the inlet end of the one-way valve through the first connecting hole (10). The detection assembly determines whether leakage occurs by comparing the pressures of the two liquid inlets. The second sealing sleeve (302) is fixedly connected to the first balancing sleeve (16) at the inlet end, and the second sealing sleeve (302) is fixedly connected to the second balancing sleeve (15) at the outlet end. The second balancing sleeve (15) has the same cross-sectional area as the first balancing sleeve (16), which is equal to the cross-sectional area of ​​the sleeve connection section between the second sealing sleeve (302) and the first sealing sleeve (301). The first balancing sleeve (16) cooperates with the first support (4) to form an inlet chamber, and the second balancing sleeve (15) cooperates with the second support (14) to form an outlet chamber. The inlet chamber is connected to the outside through a vent hole (17), and the outlet chamber is connected to the outside through another vent hole (17). The elastic force of the second spring (13) needs to be greater than the sum of the elastic force of the first spring (12), the second sealing sleeve (302), the first balancing sleeve (16) and the sliding friction force of the second balancing sleeve (15).

2. A one-way valve with backflow detection and backflow prevention functions according to claim 1, characterized in that: The detection assembly comprises a detector housing (5), a pressure detection chamber arranged in the detector housing (5) and connected to two liquid inlets, a compression spring (7), a piston (8) and an abutment column (9) arranged in the pressure detection chamber, the piston (8) being slidably arranged in the pressure detection chamber, the abutment column (9) being fixed to one end of the piston (8) close to the second connection hole (11), the compression spring (7) being arranged at one end of the piston (8) close to the first connection hole (10), the compression spring (7) pushing the piston (8) to abut against the abutment column (9) through elastic force, and a proximity sensor (6) being fixedly arranged in the detector housing (5), the proximity sensor (6) being capable of detecting the distance between the piston (8) and itself.

3. A one-way valve with backflow detection and backflow prevention functions according to claim 1, characterized in that: The support assembly comprises a first support (4) and a second support (14); the valve core (2) and the first support (4) are processed as one piece; an end of the valve core (2) away from the first support (4) is supported and fixed by the second support (14).

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