Check valve for one-way drainage system

Abstract

The check valve for the one-way drainage system comprises a valve body, a valve cavity is formed in the valve body, and a valve element structure is arranged in the valve cavity. The valve element structure comprises a conical table fixedly connected with the inner wall of the valve cavity, a circulation opening is formed in the conical table, a round rod is slidably connected into the circulation opening, a sinking groove is formed in the round rod, through holes are formed in the two sides of the round rod, a net cover is fixedly connected to the end, away from the through holes, of the round rod, and a dredging opening is formed in the lower end of the valve body. According to the check valve, the valve element structure is arranged, the sliding round rod can be matched with the spring rod to achieve the basic function of the check valve, meanwhile, in the drainage process, waste water is filtered through the net cover, impurities in the waste water are accumulated outside the net cover, the dredging opening can be opened to clean the interior of the check valve after the check valve is used for a period of time, and therefore the check valve is convenient to use. The use requirement of the check valve in a drainage system is met, and the stability of the drainage system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage valve equipment, in particular to a check valve for a one-way drainage system. Background Art

[0002] A one-way drainage check valve is an automatic valve used to block the backflow of media and ensure the one-way flow of water. It mainly relies on the coordinated action of the valve core, valve body, return spring and other components. The fluid pressure overcomes the spring force to push the valve core to move and open the valve; when the flow is reversed, the valve closes, and the spring is the source of force that pushes the valve core back to the closed position. It is widely used in hydraulic systems, pneumatic systems, fluid transmission systems, etc., as well as household and industrial water supply and drainage pipes to prevent water or other fluids from flowing back.

[0003] In the prior art, the circulating medium of the drainage system often contains a large amount of impurities, which are easily accumulated at the valve during use, thereby causing the valve core to become stuck or the sealing of the valve to decrease, resulting in water seepage or leakage, which seriously affects the stability of the drainage system. Therefore, we propose a one-way drainage system with a check valve to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and proposes a check valve for a one-way drainage system.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A check valve for a one-way drainage system comprises a valve body, a valve cavity is provided in the valve body, and a valve core structure is provided in the valve cavity;

[0007] The valve core structure includes a conical platform fixedly connected to the inner wall of the valve cavity, a flow port is provided on the conical platform, and a round rod is slidably connected in the flow port, a sink groove is provided on the round rod, and through holes are provided on both sides of the round rod, and a mesh cover is fixedly connected to the end of the round rod away from the through hole, a dredging port is provided at the lower end of the valve body, and a cover plate is threadedly connected to the dredging port, an adjusting rod is rotatably connected to one side of the valve body, a spring rod is threadedly connected to the inner thread of the adjusting rod, and the spring rod is arranged to resist the round rod.

[0008] Preferably, the spring rod comprises an outer tube, the outer tube is provided with an external thread, a compression spring is placed in the outer tube, a push rod is slidably connected in the outer tube, and the push rod is fixedly connected to the round rod.

[0009] Preferably, a sealing plug is fixedly sleeved on one end of the push rod close to the round rod, and the sealing plug is clearance-fitted with the flow port.

[0010] Preferably, a scraper is provided on the inner wall of the flow port close to the mesh cover, and the scraper is arranged to abut against the mesh cover.

[0011] Preferably, a sealing ring is fixedly connected to the connection between the mesh cover and the round rod, and a sealing platform is provided in the flow port.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model, by setting a valve core structure, can realize the basic function of a check valve by using a sliding round rod in combination with a spring rod. At the same time, during the drainage process, the mesh cover is used to filter the wastewater, so that impurities in the wastewater accumulate outside the mesh cover. After a period of use, the silt removal port can be opened to clean the inside of the check valve, meeting the use requirements of the check valve in the drainage system and ensuring the stability of the drainage system.

[0014] 2. The utility model provides an adjusting rod in conjunction with a spring rod. The user can rotate the adjusting rod outside the valve body to adjust the relative position of the spring rod and the round rod, and then adjust the starting pressure of the check valve to meet the needs of users under different working conditions. By providing a scraper, impurities on the mesh cover can be cleaned so that the impurities can fall to the lower end of the valve body instead of covering the mesh cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic cross-sectional view of a check valve for a one-way drainage system proposed by the present invention;

[0016] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0017] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at B in the middle;

[0018] Figure 4 This is a schematic diagram of the drainage state structure of a check valve for a one-way drainage system proposed by the utility model;

[0019] Figure 5 The utility model is a schematic diagram of the round rod structure of a check valve for a one-way drainage system.

[0020] In the figure: 1. Valve body; 2. Conical platform; 3. Round rod; 4. Sink; 5. Through hole; 6. Mesh cover; 7. Cover plate; 8. Adjustment rod; 9. Outer tube; 10. Compression spring; 11. Push rod; 12. Sealing plug; 13. Scraper; 14. Sealing ring; 15. Sealing platform. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figure 1-5 A check valve for a one-way drainage system includes a valve body 1, a valve cavity is provided in the valve body 1, and a valve core structure is provided in the valve cavity;

[0023] The valve core structure includes a conical platform 2 fixedly connected to the inner wall of the valve cavity, a flow port is formed on the conical platform 2, and the flow port is located in the middle part of the conical platform 2, and a round rod 3 is slidably connected to the flow port, a sink 4 is formed on the round rod 3, and through holes 5 are formed on both sides of the round rod 3, and a mesh cover 6 is fixedly connected to the end of the round rod 3 away from the through hole 5, a dredging port is formed at the lower end of the valve body 1, and a cover plate 7 is threadedly connected to the dredging port, an adjusting rod 8 is rotatably connected to one side of the valve body 1, a spring rod is internally threadedly connected to the adjusting rod 8, and the spring rod is arranged to abut against the round rod 3;

[0024] In this design, when the drainage system is in operation, wastewater enters the valve body 1, passes through the mesh cover 6, enters the trough 4, and then passes through the through hole 5 to continue flowing to the other end of the valve body 1. When the drainage system is not in operation, the elastic force of the spring rod drives the round rod 3 to return to its initial position. If backflow occurs in the drainage system, the through hole 5 will abut against the inner wall of the flow port, preventing the wastewater from passing through the check valve, thereby preventing the wastewater from flowing back.

[0025] In addition, due to the provision of the mesh cover 6, the wastewater is first filtered through the mesh cover 6 before entering the trough 4. The mesh cover 6 can be used to block impurities in the wastewater, thereby preventing impurities from entering the obtainable round rod 3, and preventing impurities from accumulating in the flow port and causing the round rod 3 to be stuck and lose its non-return ability. After the check valve has been used for a period of time, the user can open the cover 7 to clean the impurities in the valve body 1 when the drainage system is not running. It should be noted that a stop valve should be provided at the upstream of the check valve in the drainage system to avoid wastewater leakage when cleaning impurities. On the other hand, the adjusting rod 8 provided on the valve body 1 is used to adjust the starting pressure of the check valve. The user can rotate the adjusting rod 8 outside the valve body 1, so that the elastic potential energy of the spring rod changes, thereby achieving the purpose of adjusting the starting pressure.

[0026] Furthermore, the spring rod includes an outer tube 9, which is provided with an external thread, and a compression spring 10 is placed in the outer tube 9, and a push rod 11 is slidably connected to the outer tube 9, and the push rod 11 is fixedly connected to the round rod 3;

[0027] The outer tube 9 and the push rod 11 can only slide relative to each other but cannot rotate relative to each other, and the round rod 3 can also only slide within the flow port but cannot rotate.

[0028] Furthermore, a sealing plug 12 is fixedly sleeved on one end of the push rod 11 close to the round rod 3, and the sealing plug 12 is clearance-fitted with the flow port;

[0029] In this design, a sealing plug 12 is provided on the push rod 11. When the drainage system is not in operation, the sealing plug 12 can be used to seal the flow port, thereby achieving a better sealing effect and preventing wastewater from seeping into the flow port when backflow occurs in the drainage system. When the push rod 11 pushes the sealing plug 12 into the flow port, the sealing plug 12 undergoes elastic deformation to achieve sealing of the flow port.

[0030] Furthermore, a scraper 13 is provided on the inner wall of the flow port close to the mesh cover 6, and the scraper 13 is disposed against the mesh cover 6;

[0031] The scraper 13 can be provided to scrape off impurities on the mesh cover 6 after the mesh cover 6 moves, so that the impurities fall into the valve body 1 along the scraper 13, avoiding impurities blocking the mesh holes on the mesh cover 6 and causing the wastewater to pass through, thereby improving drainage efficiency.

[0032] Furthermore, a sealing ring 14 is fixedly connected to the connection between the mesh cover 6 and the round rod 3, and a sealing platform 15 is provided in the flow port;

[0033] By providing a sealing ring 14 in conjunction with a sealing platform 15, the sealing between the round rod 3 and the inner wall of the flow port can be effectively improved. When wastewater passes through the mesh cover 6, some impurities will be blocked by the mesh cover 6 and stick to the mesh cover 6. Providing a sealing platform can prevent these impurities from being stuck between the round rod 3 and the inner wall of the flow port, causing the round rod 3 to be unable to move.

[0034] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A check valve for a one-way drainage system, comprising a valve body (1), characterized in that: The valve body (1) is provided with a valve cavity, and the valve core structure is provided in the valve cavity; The valve core structure comprises a conical platform (2) fixedly connected to the inner wall of the valve cavity, a flow port is provided on the conical platform (2), and a round rod (3) is slidably connected in the flow port, a sink groove (4) is provided on the round rod (3), and through holes (5) are provided on both sides of the round rod (3), and a mesh cover (6) is fixedly connected to one end of the round rod (3) away from the through hole (5), a dredging port is provided at the lower end of the valve body (1), and a cover plate (7) is threadedly connected to the dredging port, and an adjusting rod (8) is rotatably connected to one side of the valve body (1), and a spring rod is internally threadedly connected to the adjusting rod (8), and the spring rod is arranged to abut against the round rod (3).

2. A check valve for a one-way drainage system according to claim 1, characterized in that: The spring rod comprises an outer tube (9), the outer tube (9) is provided with an external thread, a compression spring (10) is placed in the outer tube (9), a push rod (11) is slidably connected in the outer tube (9), and the push rod (11) is fixedly connected to the round rod.

3. A check valve for a one-way drainage system according to claim 2, characterized in that: A sealing plug (12) is fixedly sleeved on one end of the push rod (11) close to the round rod, and the sealing plug (12) is clearance-fitted with the flow port.

4. A check valve for a one-way drainage system according to claim 1, characterized in that: A scraper (13) is provided on the inner wall of the flow port close to the mesh cover (6), and the scraper (13) is arranged to abut against the mesh cover (6).

5. The check valve for a one-way drainage system according to claim 1, characterized in that: A sealing ring (14) is fixedly connected to the connection point between the mesh cover (6) and the round rod (3), and a sealing platform (15) is provided in the flow port.

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