Butterfly check valve

Abstract

The utility model discloses a butterfly check valve which comprises a valve body. A mounting groove is formed in a valve body, a waterproof ring is fixedly connected into the mounting groove, limiting grooves are formed in the upper end and the lower end of the mounting groove, a first valve rod is fixedly connected to the limiting grooves, and a second valve rod is fixedly connected to the lower portion of the bottom of the first valve rod; the valve body is wrapped with a valve protection shell, second mounting holes are formed in the two ends of the first valve rod, reset springs are arranged at the upper end and the lower end of the first valve rod, a third limiting block and a fourth limiting block are fixedly connected to the two ends of each reset spring, and a first shaft lug and a second shaft lug are arranged at the two ends of the second valve rod. The valve is fixedly installed through the internal open groove, the shell does not need to be holed, the internal structure is more stable, the problems of water leakage and the like are solved, and meanwhile installation convenience is improved.

Description

Technical Field

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

[0002] A check valve is a valve with a circular disc as the opening and closing part. It blocks the backflow of the medium by its own weight and the pressure of the medium. The check valve belongs to the automatic valve category, also known as a non-return valve, a one-way valve, a reverse flow valve or a back pressure valve. Its main function is to prevent liquid leakage, etc. A butterfly check valve is a valve that automatically opens and closes the valve plate by the flow of the medium itself to prevent the backflow of the medium. Usually, this valve works automatically. Under the pressure of the fluid flowing in one direction, the valve disc will automatically open the valve. When the opposite fluid contacts the valve, the valve disc will close the valve when the reaction force decreases, thereby blocking the flow of the liquid.

[0003] At present, butterfly check valves have the characteristics of compact structure, straight flow channel, small flow resistance, quick opening and closing, light weight and good economy. They are widely used in petrochemical, marine engineering, shipbuilding and other industries. Special material butterfly check valves are mainly made of precious metal materials such as titanium alloy, Hastelloy, and bidirectional stainless steel. They are mainly used in working conditions such as strong corrosion resistance, high temperature, high pressure, and large diameter.

[0004] Most of the existing valves have holes on both sides of the valve body to install valve discs during actual use. These situations can easily lead to holes in the valve, which may cause leakage and other problems. At the same time, most valves do not have components such as filters, which can easily lead to valve damage and blockage. The machine may also be damaged due to blockage. Utility Model Content

[0005] The utility model aims to provide a butterfly check valve, which solves the problems of difficult installation and disassembly of the valve in daily use, side leakage caused by valve airtightness problems, and malfunction of the valve due to clogging by impurities.

[0006] To achieve the above object, a butterfly check valve is provided, comprising a valve body, a mounting groove is provided inside the valve body, a waterproof ring is fixedly connected inside the mounting groove, limiting grooves are provided at the upper and lower ends of the mounting groove, a first valve stem is fixedly connected to the limiting groove, a second valve stem is fixedly connected to the bottom of the first valve stem, and a valve protection housing is wrapped outside the valve body;

[0007] A second mounting hole is provided at both ends of the first valve stem, a return spring is provided at the upper and lower ends of the first valve stem, a third limit block and a fourth limit block are fixedly connected at both ends of the return spring, a first shaft ear and a second shaft ear are provided at both ends of the second valve stem, and a fixed mounting hole is provided on the first shaft ear and the second shaft ear.

[0008] According to the butterfly check valve, a lug is fixedly connected to the upper end of the outer surface of the valve body, and a first mounting hole is formed inside the lug.

[0009] According to the butterfly check valve, a first limit block is fixedly connected to the lower end of the outer surface of the valve body, and second limit blocks are fixedly connected to the left and right ends of the valve body.

[0010] According to the butterfly check valve, a valve disc is fixedly connected below the bottom of the first shaft ear and the second shaft ear, and the valve disc and the first shaft ear and the second shaft ear all have mounting holes.

[0011] According to the butterfly check valve, the fixed installation hole is provided with a screw, and the screw fixes the valve disc to the first shaft ear and the second shaft ear.

[0012] According to the butterfly check valve, a sealing plate is fixedly connected below the bottom of the valve disc, and a third mounting hole is formed on the sealing plate.

[0013] According to the butterfly check valve, a fixing ring is fixedly connected to the interior of the valve protection housing, and a filter screen is fixedly connected to the fixing ring.

[0014] According to the butterfly check valve, the elastic end of the return spring is fixedly connected to the valve disc, and both ends of the valve disc are fixedly connected to the rotating shaft.

[0015] Compared with the prior art, the utility model has the following beneficial effects: by using the internal slot to fix and install the valve, not only does it not need to make holes in the shell, but the internal structure is more stable, the problem of water leakage is reduced, and the convenience of installation is also improved;

[0016] Compared with the prior art, the beneficial effects of the utility model are: by using an outer shell protective shell to protect the interior, its service life and safety are greatly improved when used in a natural environment. At the same time, a filter is arranged inside to reduce the occurrence of blockage of the internal pipeline, etc., which greatly reduces the work intensity of workers during inspection.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0019] Figure 1 This is a schematic diagram of the overall structure of a butterfly check valve of the utility model;

[0020] Figure 2 This is a front view of the overall structure of a butterfly check valve of the utility model;

[0021] Figure 3 This is a schematic diagram of the valve disc structure of a butterfly check valve of the utility model;

[0022] Figure 4 The utility model is a schematic diagram of the sealing gasket structure of a butterfly check valve.

[0023] Figure 5 The utility model is a schematic diagram of a valve protection shell structure of a butterfly check valve.

[0024] In the figure: 1. valve body; 101. lug; 102. first mounting hole; 103. first limit block; 104. second limit block; 2. mounting groove; 3. waterproof ring; 4. valve disc; 5. first valve stem; 501. second mounting hole; 502. third limit block; 503. return spring; 504. fourth limit block; 6. limit groove; 7. second valve stem; 701. first shaft ear; 702. second shaft ear; 703. fixed mounting hole; 704. screw; 8. sealing pad; 801. third mounting hole; 9. valve protection housing; 901. fixing ring; 902. filter screen; 10. rotating shaft. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-5 The embodiment of the utility model provides a technical solution: a butterfly check valve, including a valve body 1, a mounting groove 2 is provided inside the valve body 1, the mounting groove 2 has a bearing function, a waterproof ring 3 is fixedly connected inside the mounting groove 2, the waterproof ring 3 can enhance the waterproofness of the valve interior and reduce the occurrence of water leakage, a limiting groove 6 is provided at the upper and lower ends of the mounting groove 2, a first valve stem 5 is fixedly connected to the limiting groove 6, a second valve stem 7 is fixedly connected to the bottom of the first valve stem 5, and a valve protection shell 9 is wrapped outside the valve body 1, and the protection shell 9 can protect the outer surface from the influence of the natural environment and protect the stability of the internal structure;

[0027] The first valve stem 5 has a second mounting hole 501 at both ends, and a return spring 503 is provided at the upper and lower ends of the first valve stem 5. The third limit block 502 and the fourth limit block 504 are fixedly connected at both ends of the return spring 503. The third limit block 502 and the fourth limit block 504 can fix the position of the return spring 503 so that it cannot be offset. The first shaft ear 701 and the second shaft ear 702 are provided at both ends of the second valve stem 7. The first shaft ear 701 and the second shaft ear 702 have fixed mounting holes 703.

[0028] The upper end of the outer surface of the valve body 1 is fixedly connected with a lug 101, and a first mounting hole 102 is provided inside the lug 101. The lug 101 can be connected to other pipes to increase the stability of the valve, and the first mounting hole 102 can be connected to mounting holes on other pipes;

[0029] A first stopper 103 is fixedly connected to the lower end of the outer surface of the valve body 1, and second stoppers 104 are fixedly connected to the left and right ends of the valve body 1. The first stopper 103 and the second stopper 104 can ensure the stability of the valve when it is connected or used;

[0030] A valve flap 4 is fixedly connected to the bottom of the first shaft ear 701 and the second shaft ear 702, and there are mounting holes in the valve flap 4 and the first shaft ear 701 and the second shaft ear 702. The valve flap 4 is an important component in the valve to control the water flow;

[0031] The fixing hole 703 is provided with a screw 704, and the screw 704 fixes the valve flap 4 to the first shaft ear 701 and the second shaft ear 702, and the valve flap 4 and the first shaft ear 701 and the second shaft ear 702 are fixedly connected;

[0032] A sealing plate 8 is fixedly connected to the bottom of the valve disc 4. A third mounting hole 801 is provided on the sealing plate 8. The sealing plate 8 can protect the valve disc 4 from water leakage.

[0033] A fixing ring 901 is fixedly connected to the inside of the valve protection housing 9, and a filter screen 902 is fixedly connected to the fixing ring 901. The filter screen 902 can prevent impurities from entering the inside of the valve to prevent clogging;

[0034] The elastic end of the return spring 503 is fixedly connected to the valve flap 4 , and both ends of the valve flap 4 are fixedly connected to the rotating shaft 10 .

[0035] Working principle: When the device is used, the valve body 1 is first assembled, the sealing pad 8 is first placed inside the shell, and then the second valve stem 7 is placed therein through the limiting groove 6, the valve disc 4 is connected to the first shaft ear 701 and the second shaft ear 702 by screws 704, and then the first valve stem 5 is placed in the limiting groove 6, and fixed through the second mounting hole 501 on the first valve stem 5, the elastic end of the return spring 503 on the first valve stem 5 is fixedly connected to the valve disc 4, and then the valve body 1 is placed in the valve protection shell 9, and the filter screen 902 can filter the water flow after installation to reduce blockage. When in use, after the water flows through the filter screen 902, the water flow impacts the valve disc 4, and the valve plate 4 opens the valve under the action of the return spring 503. When the water flow stops or flows back, the return spring 503 closes the valve plate 4 to prevent the water from flowing back.

[0036] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A butterfly check valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a mounting groove (2) inside, a waterproof ring (3) is fixedly connected inside the mounting groove (2), limiting grooves (6) are provided at the upper and lower ends of the mounting groove (2), a first valve stem (5) is fixedly connected to the limiting groove (6), a second valve stem (7) is fixedly connected below the bottom of the first valve stem (5), and the outside of the valve body (1) is wrapped with a valve protection shell (9); The first valve stem (5) is provided with a second mounting hole (501) at both ends, and the first valve stem (5) is provided with a return spring (503) at the upper and lower ends, and the return spring (503) is fixedly connected with a third limit block (502) and a fourth limit block (504) at both ends, and the second valve stem (7) is provided with a first shaft ear (701) and a second shaft ear (702) at both ends, and the first shaft ear (701) and the second shaft ear (702) are provided with a fixed mounting hole (703).

2. A butterfly check valve according to claim 1, characterized in that: A lug (101) is fixedly connected to the upper end of the outer surface of the valve body (1), and a first mounting hole (102) is provided inside the lug (101).

3. A butterfly check valve according to claim 1, characterized in that: A first limit block (103) is fixedly connected to the lower end of the outer surface of the valve body (1), and second limit blocks (104) are fixedly connected to the left and right ends of the valve body (1).

4. A butterfly check valve according to claim 1, characterized in that: A valve flap (4) is fixedly connected below the bottom of the first shaft ear (701) and the second shaft ear (702), and mounting holes are provided inside the valve flap (4) and the first shaft ear (701) and the second shaft ear (702).

5. A butterfly check valve according to claim 4, characterized in that: The fixing and mounting hole (703) is provided with a screw (704), and the screw (704) fixes the valve flap (4) to the first shaft ear (701) and the second shaft ear (702).

6. A butterfly check valve according to claim 4, characterized in that: A sealing pad (8) is fixedly connected below the bottom of the valve flap (4), and a third mounting hole (801) is provided on the sealing pad (8).

7. A butterfly check valve according to claim 1, characterized in that: A fixing ring (901) is fixedly connected inside the valve protection housing (9), and a filter screen (902) is fixedly connected to the fixing ring (901).

8. A butterfly check valve according to claim 1, characterized in that: The elastic end of the return spring (503) is fixedly connected to the valve flap (4), and the two ends of the valve flap (4) are fixedly connected to the rotating shaft (10).

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