Check valve

Abstract

The check valve is composed of a flow guide assembly and a quick connection assembly, a medium flows into the flow guide assembly and passes through a one-way valve, a spring connected with a valve element is stressed and compressed under the action of flowing pressure, and the valve element horizontally moves towards the flowing-out direction of the medium under the action of a guide rod; when the medium flows into the quick connection assembly and then flows out of the one-way valve, due to the fact that the flowing pressure is too large when the medium flows in too quickly, the compression amount of the spring is large, the inner sealing ring on the valve element moves to the flow control plate, the medium does not flow out of the one-way valve any more, and pressure reduction is conducted through the pressure reduction element. And the situation that the reducer union on the quick connector is disconnected with other equipment or devices due to too large flowing pressure is prevented, and the safety of the devices is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of check valves, in particular to a check valve. Background Art

[0002] Check valve, also known as one-way valve, reverse flow valve, non-return valve or back pressure valve, is a valve widely used in fluid control systems. Check valve is a valve that prevents medium backflow. It uses the flow pressure of the medium itself to open and close the valve. The valve opens when the medium flows forward and closes when the medium flows backward. As a convenient and fast connection device, quick connectors further improve the connection efficiency of pipeline systems. Combining check valves with quick connectors forms a special structure of check valves with quick connectors, which can meet the needs of efficient and safe connections in industrial production. However, check valves cannot stop the outflow of liquids that flow normally but have excessive flow pressure to protect the stability of the connection between quick connectors and other devices or equipment. Utility Model Content

[0003] The purpose of the utility model is to provide a check valve to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] A check valve comprises a flow guide component and a quick-connect component. The flow guide component and the quick-connect component are connected.

[0006] The flow guide component includes a No. 1 gasket, a one-way valve, and a shell. The No. 1 gasket and the one-way valve are tightly connected, the No. 1 gasket and the shell are tightly connected, the one-way valve and the shell are tightly connected, and the No. 1 gasket, the one-way valve, and the shell are arranged along the flow direction.

[0007] The flow guide assembly and the quick-connect assembly cooperate with each other to realize the check valve's function of preventing the medium from flowing back and quickly connecting and closely cooperating with different components or equipment. The outer shell is set on the outside of the one-way valve and the No. 1 gasket is tightly connected to the one-way valve to ensure the sealing of the flow guide assembly, so that the inflowing medium will only flow into the one-way valve and will not leak out of the flow guide assembly or the gap between the one-way valve and the outer shell.

[0008] Furthermore, the one-way valve includes a cross-connecting rod, a valve core, a No. 1 spring, a guide rod, an outer sealing ring, an inner sealing ring, and a flow control plate. An inlet chamber is arranged on the one-way valve, an outlet chamber is arranged on the one-way valve, a working chamber is arranged on the one-way valve, the working chamber is located between the inlet chamber and the outlet chamber, the valve core is fixedly connected to the No. 1 spring, the cross-connecting rod is fixedly connected to the No. 1 spring, four guide rods are evenly distributed on the one-way valve, the guide rods are located in the working chamber and the outlet chamber, the guide rods are fixedly connected to the cross-connecting rods, the valve core and the guide rods are slidably connected, an outer sealing ring is arranged outside the one-way valve, an inner sealing ring is arranged on the valve core, the flow control plate is located between the working chamber and the outlet chamber, and the flow control plate is provided with a through hole with the same diameter as the inlet chamber.

[0009] When the medium flows into the one-way valve, the medium first flows to the inlet chamber through the through hole of the No. 1 gasket. Under the action of the flow pressure, the No. 1 spring connected to the valve core is compressed. Under the action of the guide rod, the valve core moves horizontally in the direction of the medium outflow. The medium flows from the inlet chamber through the gap between the four guide rods to the working chamber, and then flows to the outlet chamber through the working chamber and then flows out. When the medium flows in too fast, due to the excessive flow pressure, the No. 1 spring is compressed to a large extent, and the inner sealing ring on the valve core moves to the flow control plate so that the medium no longer flows out of the one-way valve, preventing the flow pressure from disconnecting the reducer on the quick connector from other equipment or devices, thereby ensuring the safety of the device.

[0010] Furthermore, the shell includes a pressure reducing element and a cylinder. The pressure reducing element is provided on the side of the shell close to the medium inflow. A mounting groove is provided inside the shell. A one-way valve is installed in the mounting groove and is tightly connected to the shell. A cylinder is provided outside the shell close to the medium inflow.

[0011] The one-way valve is installed in the installation groove. When the medium flows in too quickly, the flow pressure is too high, so the medium no longer flows out of the one-way valve. In order to prevent the one-way valve from being damaged by excessive pressure, the pressure reducing element is used to reduce the pressure.

[0012] Furthermore, the pressure reducing element includes a No. 2 spring and a baffle. A pressure reducing chamber is provided in the cylinder. The No. 2 spring is arranged in the pressure reducing chamber. The No. 2 spring and the cylinder are fixedly connected. The baffle is arranged in the pressure reducing chamber. The baffle and the pressure reducing chamber are slidingly connected. The baffle and the No. 2 spring are fixedly connected. The cylinder is provided with a water outlet, and the water outlet is communicated with the pressure reducing chamber.

[0013] When the flow pressure is too large, the compression amount of the No. 2 spring is large, the baffle slides to the side away from the pressure relief chamber, and the medium flows out of the pressure relief chamber to the water outlet to maintain the flow pressure within a safe range.

[0014] Furthermore, the quick-connect assembly includes a No. 2 gasket and a quick connector, and the No. 2 gasket and the quick connector are tightly connected.

[0015] Through the tight connection between the No. 2 gasket and the quick connector, the medium flowing out of the guide assembly will only flow into the quick connector and will not leak out of the quick connector assembly. The reducer allows the check valve to be quickly and accurately connected to other devices or equipment, thereby improving the connection efficiency.

[0016] Furthermore, a reducer is provided at one end of the quick connector close to the outflow of the medium, an internal thread is provided on the quick connector, an external thread is provided on the outer shell, and the internal thread and the external thread are meshed.

[0017] The check valve can be quickly connected to other devices or equipment through a reducer joint to improve the connection efficiency, and the stability of the check valve can be achieved through the internal thread and the threaded connection of the guide component.

[0018] Compared with the prior art, the beneficial effects achieved by the utility model are as follows: the one-way valve of the utility model causes the No. 1 spring connected to the valve core to be compressed under the action of the flow pressure, and the valve core is moved horizontally in the medium outflow direction under the action of the guide rod, so that the medium flows into the working chamber and then flows out of the one-way valve through the outlet chamber. When the medium flows in too fast, due to the excessive flow pressure, the compression amount of the No. 1 spring is large, and the inner sealing ring on the valve core moves to the flow control plate, so that the medium no longer flows out of the one-way valve, to prevent the flow pressure from being too large, so that the reducer on the quick connector is disconnected from other equipment or devices, thereby ensuring the safety of the device. In order to prevent the flow pressure from being too large and thus damaging the one-way valve, when the flow pressure is too large, the No. 2 spring of the pressure reducing element is compressed to a large extent, the baffle moves to the side away from the medium, and the medium flows out through the water outlet, thereby achieving the effect of pressure reduction, improving the safety and service life of the pressure reducing valve, improving the connection efficiency with other devices or equipment through the quick connector, and realizing the connection with a variety of different equipment or devices by providing a reducer on the quick connector, thereby enriching the diversity of connections. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the installation sequence of the check valve of the utility model;

[0022] Figure 3 It is a schematic diagram of the one-way valve structure of the utility model;

[0023] Figure 4 It is a cross-sectional view of the shell of the utility model;

[0024] Figure 5 It is a schematic diagram of the structure of the quick-connect assembly of the utility model;

[0025] In the figure: 1- flow guide assembly, 11- No. 1 gasket, 12- one-way valve, 121- cross connecting rod, 1211- inlet chamber, 1212- outlet chamber, 1213- working chamber, 122- valve core, 123- No. 1 spring, 124- guide rod, 125- outer sealing ring, 126- inner sealing ring, 127- flow control plate, 13- housing, 131- pressure reducing element, 1311- No. 2 spring, 1312- baffle, 132- mounting groove, 133- cylinder, 1331- pressure reducing chamber, 1332- outlet, 134- external thread, 132- mounting groove, 2- quick connection assembly, 21- No. 2 gasket, 22- quick connector, 221- reducer, 222- internal thread. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The utility model provides the following technical solutions:

[0028] like Figure 1-2 As shown, a check valve comprises a flow guide component 1 and a quick-connect component 2, wherein the flow guide component 1 and the quick-connect component 2 are connected.

[0029] The flow guide assembly 1 includes a gasket No. 11, a one-way valve 12, and a shell 13. The gasket No. 11 and the one-way valve 12 are fastened together, the gasket No. 11 and the shell 13 are fastened together, the one-way valve 12 and the shell 13 are fastened together, and the gasket No. 11, the one-way valve 12, and the shell 13 are arranged along the flow direction.

[0030] The flow guide assembly 1 and the quick-connect assembly 2 cooperate with each other to realize the function of the check valve preventing the medium from flowing back and quickly connecting and closely cooperating with different components or equipment. The outer shell 13 is sleeved on the outside of the one-way valve 12 and the No. 1 gasket 11 is closely connected with the one-way valve 12, which ensures the sealing of the flow guide assembly 1, so that the inflowing medium will only flow into the one-way valve 12 and will not leak out of the flow guide assembly 1 or the gap between the one-way valve 12 and the outer shell 13.

[0031] like Figure 3As shown, the one-way valve 12 includes a cross connecting rod 121, a valve core 122, a No. 1 spring 123, a guide rod 124, an outer sealing ring 125, an inner sealing ring 126, and a flow control plate 127. An inlet cavity 1211 is provided on the one-way valve 12, an outlet cavity 1212 is provided on the one-way valve 12, and a working cavity 1213 is provided on the one-way valve 12. The working cavity 1213 is located between the inlet cavity 1211 and the outlet cavity 1212. The valve core 122 and the No. 1 spring 123 are fixedly connected. The cross connecting rod 121 and the No. 1 spring 123 are fixedly connected. 23 is fixedly connected, the one-way valve 12 is evenly distributed with four guide rods 124, the guide rods 124 are located in the working chamber 1213 and the outlet chamber 1212, the guide rods 124 and the cross connecting rod 121 are fixedly connected, the valve core 122 and the guide rods 124 are slidably connected, an outer sealing ring 125 is provided on the outside of the one-way valve 12, an inner sealing ring 126 is provided on the valve core 122, a flow control plate 127 is located between the working chamber 1213 and the outlet chamber 1212, and the flow control plate 127 is provided with a through hole with the same diameter as the inlet chamber 1211.

[0032] When the medium flows into the one-way valve 12, the medium first flows to the inlet chamber 1211 through the through hole of the No. 1 gasket 11, and the No. 1 spring 123 connected to the valve core 122 is compressed under the action of the flow pressure, and the valve core 122 moves horizontally in the medium outflow direction under the action of the guide rod 124. The medium flows from the inlet chamber 1211 through the gaps between the four guide rods 124 to the working chamber 1213, and then flows to the outlet chamber 1212 through the working chamber 1213 and flows out. When the medium flows in too fast, due to the excessive flow pressure, the No. 1 spring 123 is compressed to a large extent, and the inner sealing ring 126 on the valve core 122 moves to the flow control plate 127, so that the medium no longer flows out of the one-way valve 12, thereby preventing the flow pressure from disconnecting the reducer 221 on the quick connector 22 from other equipment or devices, thereby ensuring the safety of the device.

[0033] like Figure 4 As shown, the shell 13 includes a pressure reducing element 131 and a cylinder 133. The pressure reducing element 131 is provided on the side of the shell 13 close to the medium inflow, and a mounting groove 132 is provided inside the shell 13. The one-way valve 12 is installed in the mounting groove 132 and is tightly connected to the shell 13. A cylinder 133 is provided outside the shell 13 close to the medium inflow.

[0034] The one-way valve 12 is installed in the installation groove 132. When the medium flows in too fast, the medium will no longer flow out of the one-way valve 12 due to excessive flow pressure. To prevent the one-way valve 12 from being damaged by excessive pressure, the pressure reducing element 131 is used to reduce pressure.

[0035] like Figure 4As shown, the decompression element 131 includes a No. 2 spring 1311 and a baffle 1312. A decompression chamber 1331 is provided in the cylinder 133. The No. 2 spring 1311 is arranged in the decompression chamber 1331. The No. 2 spring 1311 and the cylinder 133 are fixedly connected. The baffle 1312 is arranged in the decompression chamber 1331. The baffle 1312 and the decompression chamber 1331 are slidably connected. The baffle 1312 and the No. 2 spring 1311 are fixedly connected. The cylinder 133 is provided with a water outlet 1332, and the water outlet 1332 is communicated with the decompression chamber 1331.

[0036] When the flow pressure is too large, the compression amount of the second spring 1311 is large, the baffle 1312 slides to the side away from the decompression chamber 1331, and the medium flows out of the decompression chamber 1331 to the water outlet 1332 to maintain the flow pressure within a safe range.

[0037] like Figure 5 As shown, the quick-connect assembly 2 includes a No. 2 gasket 21 and a quick connector 22, and the No. 2 gasket 21 and the quick connector 22 are tightly connected.

[0038] By tightly connecting the No. 2 gasket 21 and the quick connector 22, the medium flowing out of the guide component 1 will only flow into the quick connector 22 and will not leak out of the quick connector component 2. The reducer 221 allows the check valve to be quickly and accurately connected to other devices or equipment, thereby improving the connection efficiency.

[0039] like Figure 5 As shown, a reducer 221 is provided on the quick connector 22 , an internal thread 222 is provided on the quick connector 22 , an external thread 134 is provided on the housing 13 , and the internal thread 222 and the external thread 134 are meshed.

[0040] The check valve can be quickly connected to other devices or equipment through the reducer 221 to improve the connection efficiency, and the stability of the check valve can be achieved through the threaded connection with the guide component 1 through the internal thread 222.

[0041] The working principle of the utility model is as follows: the medium flows into the inlet chamber 1211 of the one-way valve 12 through the through hole of the No. 1 gasket 11. Under the action of the flow pressure, the No. 1 spring 123 connected to the valve core 122 is compressed. Under the action of the guide rod 124, the valve core 122 moves horizontally in the medium outflow direction, so that the medium flows into the working chamber 1213 and then flows out of the one-way valve 12 through the outlet chamber 1212. When the medium flows in too fast, due to the excessive flow pressure, the compression amount of the No. 1 spring 123 is large, and the inner sealing ring 126 on the valve core 122 moves to the flow control plate 127, so that the medium no longer flows out of the one-way valve 12, preventing the flow pressure from being too large, so that the quick connection The reducer 221 on the head 22 is disconnected from other equipment or devices. To maintain the flow pressure within a safe range, when the flow pressure is too large, the No. 2 spring 1311 of the pressure reducing element 131 is compressed to a large extent, and the baffle 1312 slides to the side away from the pressure reducing chamber 1331. The medium flows out of the pressure reducing chamber 1331 to the water outlet 1332, thereby achieving the effect of pressure reduction and ensuring the safety of the device. Under normal circumstances, the medium flowing out of the guide component 1 flows into the quick connector 22 under the action of the No. 2 gasket 21, and flows out at the reducer 221 through the quick connector 22. The reducer 221 allows the check valve to be quickly and accurately connected to other devices or equipment, thereby improving the connection efficiency.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A check valve, characterized in that: The check valve comprises a flow guide component (1) and a quick-connect component (2), wherein the flow guide component (1) and the quick-connect component (2) are connected; The flow guide component (1) comprises a first gasket (11), a one-way valve (12), and a shell (13); the first gasket (11) and the one-way valve (12) are tightly connected; the first gasket (11) and the shell (13) are tightly connected; the first gasket (11) is provided with a through hole for medium circulation; the one-way valve (12) and the shell (13) are tightly connected; and the first gasket (11), the one-way valve (12), and the shell (13) are arranged along the flow direction.

2. A check valve according to claim 1, characterized in that: The one-way valve (12) comprises a cross connecting rod (121), a valve core (122), a first spring (123), a guide rod (124), an outer sealing ring (125), an inner sealing ring (126), and a flow control plate (127); an inlet chamber (1211) is provided on the one-way valve (12); an outlet chamber (1212) is provided on the one-way valve (12); a working chamber (1213) is provided on the one-way valve (12); the working chamber (1213) is located between the inlet chamber (1211) and the outlet chamber (1212); the valve core (122) and the first spring (123) are fixedly connected; the cross connecting rod (121) and the first spring (123) are fixedly connected; 3) fixedly connected, four guide rods (124) are evenly distributed on the one-way valve (12), the guide rods (124) are located in the working chamber (1213) and the outlet chamber (1212), the guide rods (124) and the cross connecting rod (121) are fixedly connected, the valve core (122) and the guide rods (124) are slidably connected, an outer sealing ring (125) is provided on the outside of the one-way valve (12), and an inner sealing ring (126) is provided on the valve core (122), the flow control plate (127) is located between the working chamber (1213) and the outlet chamber (1212), and the flow control plate (127) is provided with a through hole with the same diameter as the inlet chamber (1211).

3. A check valve according to claim 1, characterized in that: The housing (13) comprises a pressure reducing element (131) and a cylinder (133). The pressure reducing element (131) is provided on the side of the housing (13) close to the medium inflow, a mounting groove (132) is provided inside the housing (13), a one-way valve (12) is installed in the mounting groove (132) and is tightly connected to the housing (13), and a cylinder (133) is provided outside the housing (13) close to the medium inflow.

4. A check valve according to claim 3, characterized in that: The decompression element (131) comprises a No. 2 spring (1311) and a baffle (1312); a decompression chamber (1331) is provided in the cylinder (133); the No. 2 spring (1311) is arranged in the decompression chamber (1331); the No. 2 spring (1311) and the cylinder (133) are fixedly connected; the baffle (1312) is arranged in the decompression chamber (1331); the baffle (1312) and the decompression chamber (1331) are slidably connected; the baffle (1312) and the No. 2 spring (1311) are fixedly connected; the cylinder (133) is provided with a water outlet (1332); the water outlet (1332) and the decompression chamber (1331) are in communication.

5. A check valve according to claim 1, characterized in that: The quick-connect assembly (2) comprises a No. 2 gasket (21) and a quick connector (22), and the No. 2 gasket (21) and the quick connector (22) are tightly connected.

6. A check valve according to claim 5, characterized in that: The quick connector (22) is provided with a reducer (221), the quick connector (22) is provided with an internal thread (222), the outer shell (13) is provided with an external thread (134), and the internal thread (222) and the external thread (134) are meshed.

Images