Threaded cartridge hydraulic check valve

Abstract

The utility model relates to hydraulic nonreturn valve technical field discloses a screw plug -in type hydraulic nonreturn valve, including the valve body, the inside fixed mounting of valve body has the docking block, the inside screw thread connection of docking block has telescopic link, the bottom fixed mounting of telescopic link has the pressing plate, the bottom fixed mounting of pressing plate has the insertion column, the outer surface of insertion column is sleeved with the conical valve element, the inside fixed mounting of valve body has the airtight ring, the bottom fixed mounting of insertion column reaches the bottom fixed mounting of conical valve element through the limit stop, the bottom installation of conical valve element has the return spring. In the utility model, through rotating the position of telescopic link is adjusted up and down on the adjusting ring, makes the limit ring together with the inside of conical valve element moves position up and down, adjusts the position of limit stop, and limit ring is at different height, can limit the distance of conical valve element descending, and then controls the size of the water tank leakage, reaches the effect that the liquid flow size is controlled.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic check valve technology, and in particular to a threaded cartridge hydraulic check valve. Background Technology

[0002] In the field of fire protection, hydraulic check valves are key fluid control components that ensure the safe operation of fire protection equipment and the reliable water supply of fire extinguishing systems. Their core function is to solve core problems in fire protection systems such as "pressure loss, equipment damage, and water supply interruption" by blocking the reverse flow of fluid.

[0003] A threaded cartridge hydraulic check valve is a directional control element that is directly installed in the valve assembly channel using a threaded connection. It mainly consists of a threaded valve body, a cone valve core, a return spring, and seals. When liquid enters the valve body from the inlet, it pushes the cone valve core and the return spring to move, opening the outlet and allowing liquid to flow. When the liquid flows in the opposite direction, it pushes the cone valve core to close the outlet more tightly, achieving unidirectional liquid flow.

[0004] However, after the liquid enters the valve body of the check valve, the liquid flow is only controlled by the liquid pushing the cone valve core. It is not possible to control the liquid flow rate, and it is inconvenient for personnel to control the water flow through the check valve. Therefore, there is an urgent need for a threaded cartridge hydraulic check valve. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a threaded cartridge hydraulic check valve, which aims to improve the problem that check valves cannot control the amount of liquid flow.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a threaded cartridge hydraulic check valve, comprising a valve body, an inlet and an outlet respectively provided on the outer surface and bottom of the valve body, a mating block fixedly installed inside the valve body, a telescopic rod threadedly connected inside the mating block, a pressure plate fixedly installed at the bottom of the telescopic rod, a plug-in post fixedly installed at the bottom of the pressure plate, a conical valve core sleeved on the outer surface of the plug-in post, a sealing ring fixedly installed inside the valve body, a limit plate fixedly installed at the bottom of the plug-in post extending to the bottom of the conical valve core, and a return spring installed at the bottom of the conical valve core.

[0007] Through the above technical solution, rotating the adjusting ring can cause the telescopic rod to move up and down inside the docking block. When the telescopic rod moves downward, it can cause the pressure block to press against the top of the conical valve core, pushing the conical valve core downward. When the telescopic rod moves upward, it can drive the plug rod and the limiting plate to move upward, so that the limiting plate presses against the bottom of the conical valve core, fixing the conical valve core at the bottom of the sealing ring.

[0008] Preferably, the top of the conical valve core abuts against the bottom of the sealing ring, and the return spring is sleeved on the outside of the limiting plate.

[0009] Preferably, a fixing ring is fixedly installed at the bottom of the water outlet, and the fixing ring is installed at the bottom of the return spring.

[0010] Preferably, the outlet has an outlet groove inside, and a sliding sleeve is fixedly installed at the bottom of the conical valve core, the sliding sleeve being slidably installed inside the outlet.

[0011] Preferably, there are two water outlet channels, which are arranged in a circular array inside the water outlet.

[0012] Preferably, the top of the telescopic rod passes through the docking block and extends to the outside of the valve body, and an adjusting ring is installed on the top of the telescopic rod.

[0013] Preferably, a threaded ring is fixedly installed at the end of the water inlet away from the valve body, and a plug ring is fixedly installed at the end of the threaded ring away from the water inlet. A threaded cap is threadedly connected to the outer surface of the threaded ring.

[0014] Preferably, the insert ring has an internal threaded connection with a threaded sleeve, and a filter screen is installed at the end of the threaded sleeve near the water inlet.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, by rotating the adjusting ring to adjust the position of the telescopic rod, the limiting ring moves up and down together inside the conical valve core, thereby adjusting the position of the limiting plate. When the limiting ring is at different heights, the distance of the conical valve core descending can be limited, thereby controlling the amount of leakage from the water outlet and achieving the effect of controlling the liquid flow rate.

[0017] 2. In this utility model, when the liquid flow is insufficient and the conical valve core is pushed downward, the adjusting rod is rotated to move the pressure plate downward, so that the pressure plate squeezes the conical valve core downward, thereby opening the sealing ring to allow the liquid to flow out. When the liquid is not allowed to flow, the adjusting ring is rotated to move the telescopic rod upward, so that the telescopic rod drives the plug-in column and the limiting plate to move upward together, so that the top of the limiting plate abuts against the bottom of the conical valve core, making the conical valve core more firmly abut against the bottom of the sealing ring, preventing the liquid from flowing. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a threaded cartridge hydraulic check valve proposed in this utility model.

[0019] Figure 2This is a schematic cross-sectional view of the telescopic rod of a threaded cartridge hydraulic check valve proposed in this utility model.

[0020] Figure 3 for Figure 2 Enlarged structural diagram at point A in the diagram;

[0021] Figure 4 This is a schematic cross-sectional view of the threaded sleeve of a threaded cartridge hydraulic check valve proposed in this utility model.

[0022] Legend:

[0023] 1. Valve body; 11. Inlet; 12. Outlet; 2. Connecting block; 201. Telescopic rod; 202. Pressure plate; 203. Insertion post; 204. Conical valve core; 205. Sealing ring; 206. Limiting plate; 207. Return spring; 3. Fixing ring; 4. Outlet groove; 41. Sliding sleeve; 5. Adjusting ring; 6. Threaded ring; 61. Insertion ring; 62. Threaded cap; 7. Threaded sleeve; 71. Filter screen. Detailed Implementation

[0024] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Reference Figure 1-4 An embodiment of this utility model provides: a threaded cartridge hydraulic check valve, including a valve body 1, with an inlet 11 and an outlet 12 respectively opened on the outer surface and bottom of the valve body 1, a docking block 2 fixedly installed inside the valve body 1, a telescopic rod 201 threadedly connected inside the docking block 2, a pressure plate 202 fixedly installed at the bottom of the telescopic rod 201, a plug-in post 203 fixedly installed at the bottom of the pressure plate 202, a conical valve core 204 sleeved on the outer surface of the plug-in post 203, a sealing ring 205 fixedly installed inside the valve body 1, a limit plate 206 fixedly installed at the bottom of the plug-in post 203 extending to the bottom of the conical valve core 204, and a return spring 207 installed at the bottom of the conical valve core 204.

[0026] The top of the conical valve core 204 rests against the bottom of the sealing ring 205, and the return spring 207 is sleeved on the outside of the limiting plate 206. A fixing ring 3 is fixedly installed at the bottom of the outlet 12, and the fixing ring 3 is installed at the bottom of the return spring 207.

[0027] The outlet 12 has an outlet groove 4 inside, and a sliding sleeve 41 is fixedly installed at the bottom of the conical valve core 204. The sliding sleeve 41 is slidably installed inside the outlet 12. There are two outlet grooves 4, which are arranged in a circular array inside the outlet 12.

[0028] The top of the telescopic rod 201 passes through the docking block 2 and extends to the outside of the valve body 1. An adjusting ring 5 is installed on the top of the telescopic rod 201.

[0029] Specifically, liquid enters the interior of valve body 1 through the inlet 11 on the outer surface of valve body 1. When the conical valve core 204 opens, liquid can flow out from the outlet 12. The connecting block 2 is fixedly installed on the top of the inner wall of valve body 1. The telescopic rod 201 is vertically threaded into the interior of the connecting block 2, and the top of the telescopic rod 201 passes through the connecting block 2 and the top of valve body 1 and is connected to an adjusting ring 5. By rotating the adjusting ring 5, the telescopic rod 201 can move up and down inside the connecting block 2. The sealing ring 205 is fixed. The valve core 204 is installed on the bottom inner wall of the valve body 1, with the sealing ring at the top of the outlet 12. The cone diameter of the cone core 204 is larger than that of the sealing ring, so that the top of the cone core 204 can only fit against the bottom of the sealing ring 205 and cannot extend out from the bottom of the sealing ring. The bottom of the return spring 207 is fixed to the top of the fixing ring 3 at the bottom of the outlet 12, and the top of the return spring 207 is fixedly installed on the bottom of the cone core 204. Thus, the return spring 207 can press the cone core 204 against the bottom of the sealing ring 205, thus... When the water outlet 12 is closed, and the liquid pushes the push valve core downward from the top of the conical valve core 204, the conical valve core 204 no longer closes the sealing ring 205, allowing the liquid to flow down from inside the sealing ring 205. The downward movement of the conical valve core 204 will cause the sliding sleeve 41 to move downward as well, so that the sliding sleeve 41 moves to the middle of the water outlet 4, and then the liquid can flow out from the water outlet 4 and the water outlet 12. When the liquid pushes from the bottom of the conical valve core 204, the conical valve core 204 will fit more tightly against the sealing ring. At the bottom of ring 205, liquid cannot flow, achieving a one-way flow effect. When it is necessary to control the liquid flow rate, the position of telescopic rod 201 is adjusted by rotating the adjusting ring 5, causing the limiting ring to move up and down together inside the conical valve core 204, adjusting the position of the limiting plate 206. When the limiting ring is at different heights, the distance the conical valve core 204 descends can be limited, thereby controlling the amount of leakage from the water outlet 4 and achieving the effect of controlling the liquid flow rate.

[0030] It should be noted that there are two water outlet troughs 4, which are not connected. This allows the sliding sleeve 41 to move vertically up and down inside the water outlet 12. The pressure plate 202 is fixedly installed at the bottom of the telescopic rod 201. When the liquid flow is insufficient and pushes the conical valve core 204 downward, the adjusting rod is rotated to move the pressure plate 202 downward, causing the pressure plate 202 to press the conical valve core 204 downward, thereby opening the sealing ring 205 to allow the liquid to flow out. When no liquid flow is allowed, the adjusting ring 5 is rotated to move the telescopic rod 201 upward, causing the telescopic rod 201 to drive the plug-in post 203 and the limiting plate 206 to move upward together, so that the top of the limiting plate 206 abuts against the bottom of the conical valve core 204, making the conical valve core 204 more firmly abut against the bottom of the sealing ring 205, preventing liquid flow.

[0031] Considering the issue of how to quickly thread the valve body 1, refer to... Figure 1 and Figure 4 A threaded ring 6 is fixedly installed at the end of the inlet 11 away from the valve body 1. A plug ring 61 is fixedly installed at the end of the threaded ring 6 away from the inlet 11. A threaded cap 62 is threadedly connected to the outer surface of the threaded ring 6.

[0032] Specifically, the threaded ring 6 is fixedly installed at the water inlet end of the inlet 11, and the plug ring 61 is fixedly installed at the water inlet end of the threaded ring 6. The plug ring 61 is then inserted into the inside of the pipe. By rotating the threaded cap 62 to cover the pipe interface and the plug ring 61, the valve body 1 can be quickly threaded into the pipe. Similarly, the outlet 12 is provided with a threaded cap 62, a threaded ring 6, and a plug ring 61, which allows for quick installation and connection of the outlet 12.

[0033] Furthermore, considering the potential impact of impurities inside the liquid entering the valve body 1 on its operation, refer to... Figure 4 The internal thread of the plug ring 61 is connected to a threaded sleeve 7, and a filter screen 71 is installed at the end of the threaded sleeve 7 near the water inlet 11.

[0034] Specifically, the filter screen 71 is fixedly installed at one end of the threaded sleeve 7, which is threadedly connected to the inside of the plug ring 61, so that the filter plate can filter the liquid entering the valve body 1, thereby achieving the effect of filtering the liquid flowing inside the valve body 1.

[0035] Working principle: Insert the plug ring 61 into the inside of the pipe. By rotating the threaded cap 62 to cover the pipe interface and the plug ring 61, the valve body 1 can be quickly threaded into the pipe. The liquid enters the inside of the valve body 1 through the filter screen 71 and the inlet 11, where it is filtered. The liquid pushes the push valve core downward, and the conical valve core 204 no longer closes the sealing ring 205, allowing the liquid to flow down from inside the sealing ring 205. The downward movement of the conical valve core 204 will drive the sliding sleeve 41 to move downward as well, so that the sliding sleeve 41 moves to the middle of the outlet trough 4, and the liquid can then flow out from the outlet trough 4 and the outlet 12. When the liquid pushes from the bottom of the conical valve core 204, the conical valve core 204 will fit more tightly against the bottom of the sealing ring 205, preventing the liquid from flowing, thus achieving the effect of one-way liquid flow.

[0036] When it is necessary to control the liquid flow rate, the position of the telescopic rod 201 is adjusted up and down by rotating the adjusting ring 5, so that the limiting ring moves up and down together inside the conical valve core 204, and the position of the limiting plate 206 is adjusted. When the limiting ring is at different heights, the distance of the conical valve core 204 can be limited, thereby controlling the amount of leakage from the water outlet 4, and achieving the effect of controlling the liquid flow rate.

[0037] When the liquid flow is insufficient and pushes the conical valve core 204 downward, the adjusting rod is rotated to move the pressure plate 202 downward, causing the pressure plate 202 to squeeze the conical valve core 204 downward, thereby opening the sealing ring 205 to allow the liquid to flow out. When no liquid flow is allowed, the adjusting ring 5 is rotated to move the telescopic rod 201 upward, causing the telescopic rod 201 to drive the plug-in post 203 and the limiting plate 206 to move upward together, so that the top of the limiting plate 206 abuts against the bottom of the conical valve core 204, making the conical valve core 204 more firmly abut against the bottom of the sealing ring 205, preventing liquid flow.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A threaded cartridge hydraulic check valve, comprising a valve body (1), wherein an inlet (11) and an outlet (12) are respectively provided on the outer surface and bottom of the valve body (1), characterized in that: A docking block (2) is fixedly installed inside the valve body (1). A telescopic rod (201) is threadedly connected inside the docking block (2). A pressure plate (202) is fixedly installed at the bottom of the telescopic rod (201). A plug-in post (203) is fixedly installed at the bottom of the pressure plate (202). A conical valve core (204) is sleeved on the outer surface of the plug-in post (203). A sealing ring (205) is fixedly installed inside the valve body (1). A limit plate (206) is fixedly installed at the bottom of the plug-in post (203) through to the bottom of the conical valve core (204). A return spring (207) is installed at the bottom of the conical valve core (204).

2. A threaded cartridge hydraulic check valve according to claim 1, characterized in that: The top of the conical valve core (204) abuts against the bottom of the sealing ring (205), and the return spring (207) is sleeved on the outside of the limiting plate (206).

3. A threaded cartridge hydraulic check valve according to claim 1, characterized in that: A fixing ring (3) is fixedly installed at the bottom of the outlet (12), and the fixing ring (3) is installed at the bottom of the return spring (207).

4. A threaded cartridge hydraulic check valve according to claim 1, characterized in that: The outlet (12) has an outlet groove (4) inside, and the bottom of the conical valve core (204) is fixedly installed with a sliding sleeve (41), which is slidably installed inside the outlet (12).

5. A threaded cartridge hydraulic check valve according to claim 4, characterized in that: There are two water outlet troughs (4), and the two water outlet troughs (4) are arranged in a circular array inside the water outlet (12).

6. A threaded cartridge hydraulic check valve according to claim 1, characterized in that: The top of the telescopic rod (201) passes through the docking block (2) and extends to the outside of the valve body (1), and an adjusting ring (5) is installed on the top of the telescopic rod (201).

7. A threaded cartridge hydraulic check valve according to claim 1, characterized in that: A threaded ring (6) is fixedly installed at the end of the inlet (11) away from the valve body (1), and a plug ring (61) is fixedly installed at the end of the threaded ring (6) away from the inlet (11). A threaded cap (62) is threadedly connected to the outer surface of the threaded ring (6).

8. A threaded cartridge hydraulic check valve according to claim 7, characterized in that: The insert ring (61) is internally threaded with a threaded sleeve (7), and a filter screen (71) is installed at one end of the threaded sleeve (7) near the water inlet (11).

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