Threaded cartridge reverse hydraulic check valve

Abstract

The utility model relates to fire fighting check valve technical field discloses a screw plug -mounted reverse hydraulic check valve, including valve pipe, the valve pipe lower extreme fixed mounting has the thread seat, the valve pipe front side is provided with the baffle, the valve pipe inside installs the mounting panel, and the movable rod is inserted to the mounting panel middle position, and the valve plug is installed to movable rod lower extreme, the valve plug upper surface is provided with mounting assembly, the mounting assembly includes the mounting seat, the mounting seat fixed mounting is on the valve plug upper surface, movable rod lower extreme is provided with the threaded rod, and the mounting seat middle position is provided with the threaded hole hole that matches with the threaded rod. In the utility model, through being provided with the baffle and fixed sheet, the baffle can be conveniently opened and closed through the hinged baffle, the sealing gasket can guarantee the sealing property after the baffle is closed, and the cooperation of fixed sheet and fixed peg can guarantee that the baffle is fixed after the baffle is closed, prevent the baffle from appearing loose and lead to the phenomenon that the valve pipe leaks.

Description

Technical Field

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

[0002] A fire-fighting check valve is a device that ensures unidirectional water flow and prevents backflow, playing a crucial role in fire protection systems. It effectively prevents fire-fighting water from flowing back into the water supply network or other equipment, ensuring water supply safety and the stable operation of the fire protection system. Simultaneously, the check valve has a simple structure and rapid response, enabling it to open or close quickly in emergencies, ensuring timely delivery of fire-fighting water to the required location, improving fire-fighting efficiency, and reducing system maintenance costs and the risk of failure.

[0003] In existing technologies, valve plugs are prone to wear, aging, or rust during long-term use, which can lead to a decline in sealing performance and even affect the normal operation of the entire valve. However, due to the complex design of existing valve bodies or the cumbersome disassembly process, valve plug replacement is time-consuming and labor-intensive, resulting in low maintenance efficiency. It may also cause downtime losses and operational safety hazards, making it difficult to meet the requirements of modern fire protection systems for high reliability and rapid maintenance. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a threaded cartridge type reverse hydraulic check valve, which aims to improve the existing technology where valve plugs are prone to wear, aging or rust during long-term use, resulting in a decrease in sealing performance or even affecting the normal operation of the entire valve. However, due to the complex design of the existing valve body structure or the cumbersome disassembly steps, the valve plug replacement process is time-consuming and laborious.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A threaded cartridge type reverse hydraulic check valve includes a valve tube, a threaded seat fixedly installed at the lower end of the valve tube, a baffle provided at the front side of the valve tube, an installation plate installed inside the valve tube, a movable rod inserted in the middle of the installation plate, and a valve plug installed at the lower end of the movable rod, with an installation component provided on the upper surface of the valve plug.

[0006] By adopting the above technical solutions, the valve pipe is installed in a suitable position through the threaded seat. When the water flows into the valve pipe from the threaded seat, it pushes up the valve plug, thereby ensuring the smooth movement of fluid in the valve pipe. When the water flows in the opposite direction, it will drive the valve plug to block the lower end of the valve pipe, thereby preventing the water from flowing in the opposite direction.

[0007] Preferably, the mounting assembly includes a mounting base, which is fixedly mounted on the upper surface of the valve plug. The lower end of the movable rod is provided with a threaded rod, and the mounting base has a threaded hole in the middle that matches the threaded rod.

[0008] Preferably, the mounting assembly includes a mounting base, which is fixedly mounted on the upper surface of the valve plug. The movable rod is inserted into the middle position of the mounting base, and a limiting rod is inserted into the left side of the mounting base. A matching insertion hole is opened at the lower end of the movable rod, and a rubber ring is provided on the outer side of the limiting rod.

[0009] Preferably, a sealing plate is provided on the lower side of the valve pipe.

[0010] Preferably, positioning plates are provided on both the front and rear sides of the sealing plate, and positioning bolts are inserted between the two sets of positioning plates.

[0011] Preferably, the baffle is hinged to the front side of the valve tube, a sealing gasket is provided on the rear side of the baffle, and fixing plates are installed on both the baffle and the left side of the valve tube, with a fixing bolt inserted in the middle of the two sets of fixing plates.

[0012] Preferably, the valve plug is configured with a conical structure, and a sealing ring is provided on the outer side of the valve plug.

[0013] Preferably, a positioning block is provided at the upper end of the movable rod, and a return spring is sleeved on the upper end of the movable rod, with the upper and lower ends of the return spring connected to the mounting plate and the positioning block, respectively.

[0014] This utility model has the following beneficial effects: 1. In this utility model, by providing an installation component, and through the cooperation of the threaded structure and threaded rod in the installation seat, the valve plug can be quickly removed after the valve pipe is opened, so as to realize the quick replacement or repair of the valve plug, thereby ensuring the performance of the one-way valve.

[0015] 2. In this utility model, by providing a baffle and a fixing plate, the baffle, which is hinged, can be opened and closed easily. The sealing gasket ensures the sealing performance of the baffle after it is closed. Furthermore, the cooperation between the fixing plate and the fixing bolt ensures that the baffle is fixed after it is closed, preventing the baffle from loosening and causing leakage in the valve pipe. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the flow structure of a threaded cartridge type reverse hydraulic check valve proposed in this utility model. Figure 2 This is a partial structural diagram of the baffle of a threaded cartridge type reverse hydraulic check valve proposed in this utility model. Figure 3 This is a cross-sectional view of the internal structure of the valve tube of a threaded cartridge type reverse hydraulic check valve proposed in this utility model. Figure 4 This is a partial structural diagram of the threaded rod of a threaded cartridge-type reverse hydraulic check valve proposed in this utility model. Figure 5This is a partial structural diagram of the limit rod of a threaded cartridge-type reverse hydraulic check valve proposed in this utility model.

[0017] Legend: 1. Valve pipe; 2. Threaded seat; 3. Sealing plate; 4. Positioning plate; 5. Baffle; 6. Sealing gasket; 7. Fixing plate; 8. Mounting plate; 9. Movable rod; 10. Valve plug; 11. Mounting assembly; 111. Mounting seat; 112. Threaded rod; 113. Limiting rod; 114. Rubber ring; 12. Sealing ring; 13. Positioning block; 14. Return spring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1: Reference Figure 1 and Figure 2 An embodiment of this utility model is provided: a threaded cartridge type reverse hydraulic check valve, including a valve tube 1, a threaded seat 2 fixedly installed at the lower end of the valve tube 1, a baffle 5 provided at the front side of the valve tube 1, an installation plate 8 installed inside the valve tube 1, and a movable rod 9 inserted in the middle position of the installation plate 8, and a valve plug 10 installed at the lower end of the movable rod 9, and an installation component 11 provided on the upper surface of the valve plug 10. Specifically, the valve pipe 1 is installed in a suitable position through the threaded seat 2. When the water flows into the valve pipe 1 from the threaded seat 2, it pushes up the valve plug 10, thereby ensuring the smooth movement of fluid in the valve pipe 1. When the water flows in the opposite direction, it will drive the valve plug 10 to block the lower end of the valve pipe 1, thereby preventing the water from flowing in the opposite direction.

[0020] Reference Figure 4 The mounting assembly 11 includes a mounting base 111, which is fixedly mounted on the upper surface of the valve plug 10. The lower end of the movable rod 9 is provided with a threaded rod 112, and the mounting base 111 has a threaded hole in the middle that matches the threaded rod 112. Specifically, the threaded rod 112 allows the valve plug 10 to be easily installed on the lower end of the movable rod 9 via the threaded structure inside the mounting base 111, facilitating the disassembly and assembly of the valve plug 10 during use and maintenance.

[0021] Reference Figure 1 A sealing plate 3 is provided on the lower side of the valve pipe 1. Positioning pieces 4 are provided on both the front and rear sides of the sealing plate 3, and a positioning bolt is inserted between the two sets of positioning pieces 4. Specifically, the sealing plate 3 ensures a tight installation and prevents leakage at the installation location. The positioning plate 4 and the positioning bolt work together to easily fix the valve pipe 1 in a suitable position.

[0022] Reference Figure 2 The baffle 5 is hinged to the front of the valve tube 1. A sealing gasket 6 is provided on the rear side of the baffle 5. Fixing plates 7 are installed on both the left side of the baffle 5 and the valve tube 1, and a fixing bolt is inserted in the middle of the two sets of fixing plates 7. Specifically, the baffle 5, which is hinged, can be easily opened to maintain the structure inside the valve tube 1. The sealing gasket 6 ensures the sealing performance of the baffle 5 when it is closed. The fixing plate 7 and the fixing bolt can fix the baffle 5 after it is closed, thus ensuring the sealing performance of the valve tube 1.

[0023] Reference Figure 3 The valve plug 10 is configured with a conical structure, and a sealing ring 12 is provided on the outer side of the valve plug 10. A positioning block 13 is provided at the upper end of the movable rod 9, and a return spring 14 is sleeved on the upper end of the movable rod 9. The upper and lower ends of the return spring 14 are respectively connected to the mounting plate 8 and the positioning block 13. Specifically, the conical valve plug 10 and the sealing ring 12 work together to achieve a tight fit with the inner wall of the valve pipe 1, thereby effectively improving the sealing performance and preventing liquid from flowing back from the upper end of the valve plug 10. The return spring 14 and the positioning block 13 work together to quickly pull the positioning block 13 back, so that the valve plug 10 moves to the lower side of the valve pipe 1, thereby quickly blocking the lower end of the valve pipe 1 when the water flows back.

[0024] Example 2: Reference Figure 5 The mounting assembly 11 includes a mounting base 111, which is fixedly mounted on the upper surface of the valve plug 10. The movable rod 9 is inserted in the middle of the mounting base 111, and a limiting rod 113 is inserted on the left side of the mounting base 111. A matching insertion hole is opened at the lower end of the movable rod 9, and a rubber ring 114 is provided on the outside of the limiting rod 113. Specifically, the movable rod 9 is inserted into the mounting base 111 of the valve plug 10, and then the limiting rod 113 is inserted into the insertion hole opened in the mounting base 111 and the movable rod 9 to fix the movable rod 9. The rubber ring 114 on the outside of the limiting rod 113 ensures the tightness of the installation of the limiting rod 113 and prevents the limiting rod 113 from loosening.

[0025] Working principle: The valve plug 10 is installed at the lower end of the movable rod 9 by the mounting component 11. Then the baffle 5 is closed and fixed by the fixing plate 7 and the fixing bolt. The sealing gasket 6 ensures the sealing of the baffle 5 after it is closed. Then the valve pipe 1 is installed in a suitable position by the threaded seat 2. When the water flows through the threaded seat 2 to the valve pipe 1, the water flow will push up the valve plug 10 to facilitate the flow of water. When the water flows through the valve pipe 1 to the threaded seat 2, the return spring 14 and the water flow will drive the valve plug 10 to return to its original position, thereby sealing the lower end of the valve pipe 1 and ensuring that the water flow in the valve pipe 1 can only flow in one direction.

[0026] 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 reverse hydraulic check valve comprising a valve tube (1), characterized in that: A threaded seat (2) is fixedly installed at the lower end of the valve tube (1), a baffle (5) is provided on the front side of the valve tube (1), an installation plate (8) is installed inside the valve tube (1), a movable rod (9) is inserted in the middle of the installation plate (8), and a valve plug (10) is installed at the lower end of the movable rod (9). An installation component (11) is provided on the upper surface of the valve plug (10).

2. A threaded cartridge reverse hydraulic check valve according to claim 1, wherein: The mounting assembly (11) includes a mounting base (111), which is fixedly mounted on the upper surface of the valve plug (10). The lower end of the movable rod (9) is provided with a threaded rod (112), and a threaded hole matching the threaded rod (112) is opened in the middle position of the mounting base (111).

3. A threaded cartridge reverse hydraulic check valve according to claim 1, wherein: The mounting assembly (11) includes a mounting base (111), which is fixedly mounted on the upper surface of the valve plug (10). The movable rod (9) is inserted in the middle of the mounting base (111), and a limiting rod (113) is inserted on the left side of the mounting base (111). A matching insertion hole is opened at the lower end of the movable rod (9), and a rubber ring (114) is provided on the outside of the limiting rod (113).

4. A threaded cartridge reverse hydraulic check valve according to claim 1, wherein: A sealing plate (3) is provided on the lower side of the valve pipe (1).

5. A threaded cartridge reverse hydraulic check valve according to claim 4, wherein: The sealing plate (3) is provided with positioning pieces (4) on both the front and rear sides, and positioning bolts are inserted in the middle of the two sets of positioning pieces (4).

6. A threaded cartridge reverse hydraulic check valve according to claim 1 wherein: The baffle (5) is hinged to the front of the valve tube (1). A sealing gasket (6) is provided on the rear side of the baffle (5). Fixing plates (7) are installed on the left side of both the baffle (5) and the valve tube (1), and a fixing bolt is inserted in the middle of the two sets of fixing plates (7).

7. A threaded cartridge reverse hydraulic check valve according to claim 1 wherein: The valve plug (10) is configured with a conical structure, and a sealing ring (12) is provided on the outer side of the valve plug (10).

8. A threaded cartridge reverse hydraulic check valve according to claim 1 wherein: The upper end of the movable rod (9) is provided with a positioning block (13), and the upper end of the movable rod (9) is fitted with a reset spring (14), and the upper and lower ends of the reset spring (14) are respectively connected to the mounting plate (8) and the positioning block (13).

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