Check valve convenient to install

Abstract

The utility model discloses a check valve convenient to install, which comprises a circular-tube-shaped valve body, and a valve clack and a pressing ring are arranged in the valve body. An elastic piece is further arranged between the valve clack and the pressing ring. A valve rod is arranged in the middle of the valve clack, and the other end of the valve rod penetrates through the elastic piece and the pressing ring and then is exposed out of the pressing ring. When the medium force is larger than the elastic force of the elastic piece, the valve clack and the valve rod slide along the pressing ring, opening of the valve body is completed, and when the medium flows back, the medium force and the elastic force of the elastic piece are overlapped, and the valve is prompted to be closed instantly. Meanwhile, the elastic piece on the back of the valve clack has initial valve closing force, so that the valve can be installed in any direction, and field pipe distribution and installation are greatly facilitated. Particularly, the valve body of the valve is cylindrical, so that the valve can be manufactured in batches by directly purchasing ready-made profiles, and the materials are simple; in addition, the valve assembly is few, the process is few, manufacturing is easy, the production and manufacturing cost is low, and the market competitiveness of the valve can be improved.

Description

Technical Field

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

[0002] A check valve is a valve that has a circular disc as the opening and closing part and blocks the backflow of the medium by its own weight and the pressure of the medium. It is an automatic valve and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. The disc movement modes are divided into lift type and swing type. The lift check valve is similar to the stop valve in structure and lacks a valve stem to drive the disc. In the pipeline system, the check valve is generally not allowed to bear weight. The lift vertical disc check valve should be installed on the vertical pipeline, the lift horizontal disc check valve should be installed on the horizontal pipeline, and the swing check valve should be installed horizontally. It can be seen that the check valve cannot bear weight in the pipeline and cannot be installed in any direction, which often brings inconvenience when laying the pipe. Utility Model Content

[0003] The purpose of the utility model is to provide a check valve which is easy to install, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a check valve that is easy to install, including a tubular valve body, and a valve flap and a pressure ring are arranged inside the valve body, and an elastic member is also arranged between the valve flap and the pressure ring; a valve stem is arranged in the middle of the valve flap, and the other end of the valve stem passes through the elastic member and the pressure ring and is exposed outside the pressure ring.

[0005] As a preferred technical solution of the utility model: the elastic member includes a first spring and a second spring, and the first spring and the second spring are coaxially sleeved outside the valve stem.

[0006] As a preferred technical solution of the utility model: after the first spring and the second spring are sleeved on the outside of the valve stem, the spiral directions of the first spring and the second spring are completely opposite.

[0007] As a preferred technical solution of the utility model: a stopper is also provided on the valve stem, and the stopper abuts against the pressure ring to prevent the valve stem from continuing to slide toward the outside of the pressure ring.

[0008] As a preferred technical solution of the utility model: the pressure ring is matched with the internal thread provided on the inner wall of the valve body through the external thread provided.

[0009] As a preferred technical solution of the utility model: a guide column for guiding the sliding of the valve stem is also provided in the middle of the pressure ring, and the guide column is connected to the pressure ring through a connecting rod.

[0010] As a preferred technical solution of the utility model: the number of the connecting rods is multiple, the multiple connecting rods are arranged in a circular array outside the guide column, and the guide column, the connecting rod and the pressure ring are an integrally formed structure.

[0011] By adopting the above technical solution, the beneficial effect of the utility model is as follows: when the medium force is greater than the elastic force of the elastic member, the valve disc and the valve stem slide along the pressure ring to complete the opening of the valve body. When the medium flows back, the medium force and the elastic force of the elastic member are superimposed, causing the valve to close instantly. At the same time, the elastic member on the back of the valve disc has an initial valve closing force, so it can be installed in any direction, which greatly facilitates on-site piping and installation. In particular, the valve body of the valve is cylindrical, so it can be directly purchased from ready-made profiles for batch production, and the materials are simple; in addition, the valve has fewer components, fewer processes, simple manufacturing, and low production and manufacturing costs, which can also enhance the market competitiveness of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional schematic diagram of the main structure of the utility model;

[0013] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0014] Figure 3 It is a schematic diagram of the main structure of the pressure ring of the utility model.

[0015] In the figure: 1. valve body; 2. first spring; 3. second spring; 4. stop member; 5. pressure ring; 6. valve stem; 7. valve disc; 8. guide column; 9. external thread; 10. internal thread; 11. elastic member; 12. connecting rod. DETAILED DESCRIPTION

[0016] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present utility model, and should not be construed as limitations on the present utility model. In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model.

[0017] See also Figure 1-3The utility model provides an embodiment: a check valve that is easy to install, including a tubular valve body 1, and a valve flap 7 and a pressure ring 5 are arranged inside the valve body 1, and an elastic member 11 is also arranged between the valve flap 7 and the pressure ring 5; a valve stem 6 is arranged in the middle of the valve flap 7, and the other end of the valve stem 6 passes through the elastic member 11 and the pressure ring 5 and is exposed outside the pressure ring 5.

[0018] In summary, when the medium force is greater than the elastic force of the elastic member 11, the valve flap 7 and the valve stem 6 slide along the pressure ring 5 to complete the opening of the valve body 1. When the medium flows back, the medium force and the elastic force of the elastic member 11 are superimposed, causing the valve to close instantly. At the same time, the elastic member 11 on the back of the valve flap 7 has an initial valve closing force, so it can be installed in any direction, which greatly facilitates on-site piping and installation. In particular, the valve body 1 of the valve is cylindrical, so it can be directly purchased from ready-made profiles for batch production, and the materials are simple; in addition, the valve has fewer components, fewer processes, simple manufacturing, and low production costs, which can also enhance the market competitiveness of the valve.

[0019] Furthermore, the elastic member 11 includes a first spring 2 and a second spring 3, and the first spring 2 and the second spring 3 are coaxially sleeved outside the valve stem 6. Due to the friction between the two springs, it can better absorb and reduce shock when subjected to external vibration, thereby protecting the device from damage. At the same time, the double spring can withstand a larger load, and because the force between the two springs is balanced, the stability of the device can be improved. In addition, since the double spring can better withstand loads and vibrations, its service life will be relatively longer.

[0020] Furthermore, after the first spring 2 and the second spring 3 are sleeved on the outside of the valve stem 6 , the spiral directions of the first spring 2 and the second spring 3 are completely opposite.

[0021] In summary, the use of double springs is actually to stack two springs in different directions to form a "V" shape. This design can create a certain friction between the two springs, and the degree of compression under load is also different, thus improving the shockproof ability and stability of the spring.

[0022] On the basis of the above solution, since the valve stem 6 is further provided with a stopper 4, the stopper 4 abuts against the pressure ring 5 to prevent the valve stem 6 from continuing to slide toward the outside of the pressure ring 5. Therefore, the stopper 4 prevents the valve flap 7 from moving toward the inside of the valve body 1, thereby preventing the spring from being over-compressed and affecting its performance.

[0023] Furthermore, since the pressure ring 5 is threadably matched with the internal thread 10 provided on the inner wall of the valve body 1 through the external thread 9, it is possible to facilitate the installation of the pressure ring 5 while ensuring that the position of the pressure ring 5 is stable and reliable after installation. In addition, after the pressure ring 5 is installed, the pressure ring 5 can be spot welded into the valve body 1, thereby ensuring that the pressure ring 5 can be used for a long time and the position remains unchanged.

[0024] In addition, since a guide column 8 for guiding the sliding of the valve stem 6 is also provided in the middle of the pressure ring 5, and the guide column 8 is connected to the pressure ring 5 through a connecting rod 12, when the valve stem 6 passes through the guide column 8, the guide column 8 is used to guide the sliding of the valve stem 6, thereby avoiding the valve stem 6 from shaking during movement, thereby ensuring that the valve stem 6 slides back and forth along its central axis.

[0025] At the same time, there are multiple connecting rods 12, and the multiple connecting rods 12 are arranged in a circular array outside the guide column 8, and the guide column 8, the connecting rod 12 and the pressure ring 5 are an integrally formed structure, so that while the structural strength of the pressure ring 5 is enhanced, the connecting rod 12 can be used to enhance the structural strength of the guide column 8. In particular, the connecting rod 12, the guide column 8 and the pressure ring 5 are integrally formed, so that while the pressure ring 5 guides the valve stem 6, its structural strength is further enhanced, and the gap between the connecting rods 12 and the connecting rods 12 facilitates the flow of water.

[0026] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A check valve that is easy to install, characterized in that: It comprises a circular tubular valve body (1), a valve flap (7) and a pressure ring (5) are arranged inside the valve body (1), and an elastic member (11) is also arranged between the valve flap (7) and the pressure ring (5); A valve stem (6) is provided in the middle of the valve flap (7), and the other end of the valve stem (6) passes through the elastic member (11) and the pressure ring (5) and is exposed outside the pressure ring (5); The elastic member (11) comprises a first spring (2) and a second spring (3), and the first spring (2) and the second spring (3) are coaxially sleeved outside the valve stem (6); After the first spring (2) and the second spring (3) are sleeved on the outside of the valve stem (6), the spiral directions of the first spring (2) and the second spring (3) are completely opposite.

2. A check valve that is easy to install according to claim 1, characterized in that: The valve stem (6) is also provided with a stopper (4), which abuts against the pressure ring (5) to prevent the valve stem (6) from continuing to slide toward the outside of the pressure ring (5).

3. A check valve that is easy to install according to claim 2, characterized in that: The pressure ring (5) is threadably matched with an internal thread (10) provided on the inner wall of the valve body (1) via an external thread (9) provided thereon.

4. A check valve that is easy to install according to claim 3, characterized in that: A guide column (8) for guiding the sliding of the valve stem (6) is also provided in the middle of the pressure ring (5), and the guide column (8) is connected to the pressure ring (5) via a connecting rod (12).

5. A check valve that is easy to install according to claim 4, characterized in that: The number of the connecting rods (12) is multiple, and the multiple connecting rods (12) are arranged in a circular array outside the guide column (8), and the guide column (8), the connecting rod (12) and the pressure ring (5) are an integrally formed structure.

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