A dual-channel axial flow check valve with regulating function

Abstract

The present invention provides a dual-channel axial flow check valve with an adjustment function, comprising a first valve body, a valve disc and a second valve body, one end of the first valve body is fixedly connected to the outlet pipe, one end of the second valve body is fixedly connected to the inlet pipe, the other end of the first valve body is fixedly connected to the other end of the second valve body, the valve disc comprises a flap body, a first sealing ring, a second sealing ring and a plurality of springs, the flap body and the cross section are a T-shaped structure, the lower end of the flap body is contacted and connected to the inside of the second valve body through a plurality of springs, the outer periphery of the flap body is sleeved to the inner ring of the second valve body, and the upper end of the flap body is sequentially installed with the first sealing ring and the second sealing ring from the inside to the outside. The dual-channel axial flow check valve with an adjustment function described in the present invention, the spring can automatically change the opening of the flap body according to the pressure difference between the front and rear of the valve, and the different operating positions of the flap body can change the medium flow and pressure passing through the valve, playing the role of regulating flow and pressure.

Description

Technical Field

[0001] The invention belongs to the technical field of check valves, and in particular relates to a double-channel axial flow check valve with an adjusting function. Background Art

[0002] The working principle of the axial flow check valve is to determine the opening and closing of the valve disc by the pressure difference between the inlet and outlet of the valve. When the pressure at the inlet is greater than the sum of the spring forces of the pressure cycle at the outlet, the valve disc opens. As long as there is a pressure difference, the valve disc is always in an open state, but the degree of opening is determined by the size of the pressure difference. The traditional check valve disc has only one channel, and the medium generally flows around the periphery of the valve disc, and the medium acts on the entire valve disc plane, so the impact force of the medium on the valve disc is very large, which will cause varying degrees of damage to the sealing surface, which greatly shortens the service life of the valve. Summary of the invention

[0003] In view of this, the present invention aims to propose a dual-channel axial flow check valve with an adjustment function to solve the problem that the impact force of the medium on the valve disc is very large, which in turn causes varying degrees of damage to the sealing surface and shortens the service life of the valve.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A dual-channel axial flow check valve with an adjustment function comprises a first valve body, a valve disc and a second valve body, one end of the first valve body is fixedly connected to a water outlet pipe, one end of the second valve body is fixedly connected to a water inlet pipe, and the other end of the first valve body is fixedly connected to the other end of the second valve body, the valve disc comprises a flap body, a first sealing ring, a second sealing ring and a plurality of springs, the cross-section of the flap body is a T-shaped structure, the lower end of the flap body is contacted and connected to the interior of the second valve body through a plurality of springs, and a plurality of blind holes are circumferentially arranged at the lower end of the flap body, a spring is installed in each of the blind holes, the outer periphery of the flap body is sleeved on the inner ring of the second valve body, the upper end of the flap body is sequentially installed with the first sealing ring and the second sealing ring from the inside to the outside, and the outer periphery of the first sealing ring, the outer periphery of the second sealing ring and the upper end of the flap body are all contacted and connected to the interior of the first valve body.

[0006] Furthermore, the cross-sections of the first sealing ring and the second sealing ring are both circular ring structures, the vertical sections of the first sealing ring and the second sealing ring are both triangular structures, the upper end of the petal body is provided with a first ring groove and a second ring groove from the inside to the outside, the vertical sections of the first ring groove and the second ring groove are both triangular structures, the outer periphery of the first sealing ring is clamped into the first ring groove, the outer periphery of the second sealing ring is clamped into the second ring groove, and the material of the first sealing ring and the second sealing ring are both rubber.

[0007] Furthermore, the first valve body includes a first tube body, a first flange, a second flange, guide ribs and a guide plate. The periphery of the first end of the first tube body is fixedly connected to the water outlet pipe through the second flange, the periphery of the second end of the first tube body is fixedly connected to one end of the second valve body through the first flange, and the guide plate is installed on the inner circle of the first end of the first tube body through a plurality of guide ribs. The guide plate is located in the middle of the first tube body, and one end of the guide plate is respectively contacted and connected to the periphery of the first sealing ring, the periphery of the second sealing ring and the upper end of the valve body.

[0008] Furthermore, the guide plate is an arc-shaped convex structure, and a plurality of guide ribs are distributed in a star-shaped pattern along the inner circle of the first tube body. One end of each guide rib is fixedly connected to the periphery of the guide plate, and the other end of the guide rib is fixedly connected to the inner circle of the first tube body, and a first guide hole is formed between the guide ribs.

[0009] Furthermore, the second valve body includes a second tube body, a third flange, a fourth flange, a guide column and support ribs. The first end of the second tube body is fixedly connected to the water inlet pipe through the third flange. The outer periphery of the second end of the second tube body is fixedly connected to the second end of the first tube body through the fourth flange. The inner circle of the second end of the second tube body is fixedly connected to the outer periphery of the guide column through a plurality of support ribs. The plurality of support ribs are distributed in a star-shaped pattern along the outer periphery of the guide column. Second guide holes are formed between the support ribs. The lower end of the valve body is fixedly connected to the first end of the guide column through a plurality of springs. The first end of the guide column is located in the first tube body, and the second end of the guide column is located in the second tube body.

[0010] Furthermore, the second valve body also includes a first ring body and a second ring body installed in sequence from the inside to the outside at the first end of the guide column, the first ring body, the second ring body and the guide column are coaxially arranged, the lower end of the valve body is clamped to the inner ring of the second ring body, and each spring is located between the inner ring of the second ring body and the outer periphery of the first ring body.

[0011] Furthermore, a third guide hole is provided in the middle of the valve body, a fourth guide hole is provided in the middle of the guide column, and the third guide hole is communicated with the fourth guide hole.

[0012] Furthermore, a plurality of jet holes are evenly distributed on the side wall of the second ring body.

[0013] Furthermore, the petal body includes a third ring body and a fourth ring body, the third guide hole penetrates the third ring body and the fourth ring body, a plurality of blind holes are provided at the lower end of the fourth ring body, and the lower end of the fourth ring body is clamped between the inner ring of the second ring body and the outer periphery of the first ring body, the third ring body is installed at the upper end of the fourth ring body, the outer diameter of the third ring body is larger than the outer diameter of the fourth ring body, the upper outer edge of the third ring body and the annular end face of the guide plate are both provided with chamfers, the two chamfers have the same size and are symmetrically arranged, and the second annular groove is located in the chamfer of the third ring body.

[0014] Furthermore, the annular end surface of the guide plate and the upper end of the third ring body are both provided with a sealing surfacing alloy.

[0015] Compared with the prior art, the dual-channel axial flow check valve with adjustment function described in the present invention has the following advantages:

[0016] (1) The dual-channel axial flow check valve with an adjustment function described in the present invention has a structure in which, when the valve is closed, the triangular first sealing ring and the second sealing ring first contact with the sealing cladding alloy of the valve body, and then the sealing cladding alloy of the flap body contacts with the sealing cladding alloy of the valve body. This structure effectively reduces the damage to the sealing surface caused by the mutual collision of the valve body and the valve flap sealing cladding alloy and the noise generated by the mutual collision, and also alleviates the excessive extrusion of the valve flap soft seal, greatly improves the wear resistance of the sealing surface and the service life of the valve, prevents water leakage in this part, and increases the reliability of the check valve.

[0017] (2) The present invention discloses a dual-channel axial flow check valve with an adjustment function. The spring can automatically change the opening of the valve body according to the pressure difference between the front and rear of the valve. The different operating positions of the valve body can change the flow rate and pressure of the medium passing through the valve, thereby playing a role in regulating flow and pressure.

[0018] (3) The dual-channel axial flow check valve with an adjustment function described in the present invention has a dual-channel valve body design that can quickly and effectively balance the pressure difference between the front and back of the valve. As long as the valve is opened a small part, the medium quickly enters the second guide hole from the outer periphery of the valve body and the third guide hole respectively. Since the two channels of the valve body are opened at the same time, the pressure difference between the front and back of the valve can be quickly balanced.

[0019] (4) The present invention discloses a dual-channel axial flow check valve with an adjustment function. The second ring body has jet holes evenly distributed around it so that the valve disc is evenly stressed when it is opened and closed. At the same time, compression springs of the same size, pressure and length are evenly arranged around the back of the valve disc. This structure effectively mitigates the violent collision between the end of the valve disc and the second ring body, and also reduces the noise generated by the collision between them. Before the valve is closed, the jet holes evenly arranged around the second ring body effectively guide the medium into the space between the valve disc 1 and the second ring body, so that part of the medium directly acts on the second ring body and is quickly discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1This is a schematic structural diagram of a dual-channel axial flow check valve with an adjustment function according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the exploded structure of a dual-channel axial flow check valve with an adjustment function according to an embodiment of the present invention;

[0023] Figure 3 It is a cross-sectional view of a dual-channel axial flow check valve with an adjustment function according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the exploded structure of the valve flap according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic structural diagram of a first valve body according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic structural diagram of a second valve body according to an embodiment of the present invention;

[0027] Description of reference numerals:

[0028] 1-first valve body; 11-first tube body; 12-first flange; 13-second flange; 14-guide rib; 15-guide plate; 2-second valve body; 21-second tube body; 22-third flange; 23-fourth flange; 24-guide column; 25-support rib; 26-first ring body; 27-second ring body; 3-valve flap; 31-flap body; 311-third ring body; 312-fourth ring body; 32-first sealing ring; 33-second sealing ring; 34-spring. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0033] like Figure 1-6 As shown, a dual-channel axial flow check valve with an adjustment function includes a first valve body 1, a valve disc 3 and a second valve body 2. One end of the first valve body 1 is fixedly connected to a water outlet pipe, one end of the second valve body 2 is fixedly connected to a water inlet pipe, and the other end of the first valve body 1 is fixedly connected to the other end of the second valve body 2. The valve disc 3 includes a flap body 31, a first sealing ring 32, a second sealing ring 33 and a plurality of springs 34. The cross section of the flap body 31 is a T-shaped structure. The lower end of the flap body 31 is in contact with and connected to the interior of the second valve body 2 through a plurality of springs 34. The lower end of the flap body 31 is provided with a plurality of blind holes along the circumferential direction. A spring 34 is installed in each of the blind holes. The flap body 31 is provided with a plurality of blind holes along the circumferential direction. The valve disc 3 is provided with two medium flow channels, each of which is provided with a first sealing ring 32 and a second sealing ring 33. The annular end surface of the guide plate 15 of the first valve body 1 and the upper end of the third ring body 311 of the valve disc 3 are both provided with a sealing cladding alloy. The first sealing ring 32, the second sealing ring 33 and the sealing cladding alloy form a sealing surface combining soft and hard seals, thereby ensuring the sealing of this part.

[0034] The cross sections of the first sealing ring 32 and the second sealing ring 33 are both circular ring structures, and the vertical sections of the first sealing ring 32 and the second sealing ring 33 are both triangular structures. The upper end of the petal body 31 is provided with a first ring groove and a second ring groove in sequence from the inside to the outside. The vertical sections of the first ring groove and the second ring groove are both triangular structures. The periphery of the first sealing ring 32 is snapped into the first ring groove, and the periphery of the second sealing ring 33 is snapped into the second ring groove. The first sealing ring 32 and the second sealing ring 33 are both made of rubber. The first ring groove and the second ring groove corresponding to the first sealing ring 32 and the second sealing ring 33 increase the snap-fit ​​effect and sealing elasticity, ensuring The service life of the first sealing ring 32 and the second sealing ring 33 is extended. When the valve is closed, the triangular first sealing ring 32 and the second sealing ring 33 first contact the sealing cladding alloy of the valve body 1, and then the sealing cladding alloy of the flap body 31 contacts the sealing cladding alloy of the valve body 1. This structural form effectively reduces the damage to the sealing surface caused by the mutual collision of the sealing cladding alloys of the valve body 1 and the valve flap 3 and the noise generated by the mutual collision, and also alleviates the excessive extrusion of the soft seal of the valve flap 3, greatly improves the wear resistance of the sealing surface and the service life of the valve, prevents water leakage in this part, and increases the reliability of the check valve.

[0035] The first valve body 1 comprises a first tube body 11, a first flange 12, a second flange 13, a guide rib 14 and a guide plate 15. The periphery of the first end of the first tube body 11 is fixedly connected to the water outlet pipe through the second flange 13. The periphery of the second end of the first tube body 11 is fixedly connected to one end of the second valve body 2 through the first flange 12. The guide plate 15 is installed on the inner circle of the first end of the first tube body 11 through a plurality of guide ribs 14. The guide plate 15 is located in the middle of the first tube body 11. One end of the guide plate 15 is respectively in contact with and connected to the outer surface of the first sealing ring 32. The guide plate 15 is an arc-shaped convex structure, and a plurality of guide ribs 14 are distributed in a star-shaped manner along the inner circle of the first tube body 11. One end of each guide rib 14 is fixedly connected to the outer periphery of the guide plate 15, and the other end of the guide rib 14 is fixedly connected to the inner circle of the first tube body 11. First guide holes are formed between the guide ribs 14. The first tube body 11, the first flange 12, the second flange 13, the guide ribs 14 and the guide plate 15 are a cast-in-one structure, which ensures the concentricity of the guide in the valve body.

[0036] The second valve body 2 includes a second pipe body 21, a third flange 22, a fourth flange 23, a guide column 24 and a support rib 25. The first end of the second pipe body 21 is fixedly connected to the water inlet pipe through the third flange 22. The second end of the second pipe body 21 is fixedly connected to the second end of the first pipe body 11 through the fourth flange 23. The inner circle of the second end of the second pipe body 21 is fixedly connected to the periphery of the guide column 24 through a plurality of support ribs 25. The plurality of support ribs 25 are distributed in a star-shaped manner along the periphery of the guide column 24. Second guide holes are formed between the support ribs 25. The lower end of the valve body 31 is fixedly connected to the first end of the guide column 24 through a plurality of springs 34. The guide column 2 The first end of the guide column 24 is located in the first tube body 11, and the second end of the guide column 24 is located in the second tube body 21. The second valve body 2 also includes a first ring body 26 and a second ring body 27 installed in sequence from the inside to the outside at the first end of the guide column 24. The first ring body 26, the second ring body 27 and the guide column 24 are coaxially arranged. The lower end of the flap body 31 is clamped to the inner ring of the second ring body 27, and each spring 34 is located between the inner ring of the second ring body 27 and the outer periphery of the first ring body 26. The spring 34 can automatically change the opening of the flap body 31 according to the pressure difference between the front and rear of the valve. Different operating positions of the flap body 31 can change the medium flow and pressure passing through the valve, so as to play the role of flow and pressure regulation.

[0037] A third guide hole is provided in the middle of the valve body 31, and a fourth guide hole is provided in the middle of the guide column 24. The third guide hole and the fourth guide hole are connected. The design of the dual-channel valve body 31 can quickly and effectively balance the pressure difference before and after the valve. As long as the valve is opened a small part, the medium quickly enters the second guide hole from the outer periphery of the valve body 31 and the third guide hole respectively. Because the two channels of the valve body 31 are opened at the same time, the pressure difference before and after the valve can be quickly balanced.

[0038] A plurality of jet holes are evenly distributed on the side wall of the second ring body 27. The jet holes are evenly distributed around the second ring body 27 so that the valve disc 1 is subjected to uniform force when opening and closing. At the same time, compression springs 34 of the same size, pressure and length are evenly arranged around the back of the valve disc 1. This structural form effectively reduces the violent collision between the end of the valve disc 1 and the second ring body 27, and also reduces the noise generated by the collision between them. Before the valve is closed, the jet holes evenly arranged around the second ring body 27 effectively introduce the medium into the space between the valve disc 1 and the second ring body 27, so that part of the medium directly acts on the second ring body 27 and is quickly discharged.

[0039] The petal body 31 includes a third ring body 311 and a fourth ring body 312, the third guide hole penetrates the third ring body 311 and the fourth ring body 312, a plurality of blind holes are provided at the lower end of the fourth ring body 312, and the lower end of the fourth ring body 312 is clamped between the inner ring of the second ring body 27 and the outer periphery of the first ring body 26, the third ring body 311 is installed at the upper end of the fourth ring body 312, the outer diameter of the third ring body 311 is larger than the outer diameter of the fourth ring body 312, the upper outer edge of the third ring body 311 and the annular end face of the guide plate 15 are both provided with chamfers, the two chamfers have the same size and are symmetrically arranged, and the second annular groove is located in the chamfer of the third ring body 311.

[0040] A dual-channel axial flow check valve with an adjustment function also includes a fixing component, wherein the first valve body 1 and the second valve body 2 are fixedly connected to an external bracket through a fixing component, and each of the fixing components includes a fixed angle plate and a rubber pad, wherein one end of the fixed angle plate is fixedly connected to the periphery of the first tube body 11 and the periphery of the second tube body 21, and a rubber pad is arranged at the other end of the fixed angle plate, and the impact of the rubber pad on the valve disc 3 is effectively consumed by the shock absorber, and the decompressed medium then acts smoothly and evenly on the back of the valve disc 3, and at the same time, the spring 34 evenly distributed on the back of the valve disc 3 also acts on the valve disc 3, so that the seal between the valve disc 3 and the valve body 1 is more tightly matched, thereby ensuring that the valve can be reliably sealed even under low pressure.

[0041] The use process of a dual-channel axial flow check valve with adjustment function:

[0042] When the pressure of the water inlet pipe gradually increases, the double-channel axial flow check valve with regulating function gradually opens, and the water flow in the water inlet pipe hits one side of the flap body 31. The fourth ring body 312 at the bottom of the flap body 31 is pressed to a plurality of springs 34. The springs 34 are compressed, and the water flows through the periphery of the flap body 31 and the middle of the flap body 31 to the second guide hole. Since the two channels of the flap body 31 are opened at the same time, the pressure difference between the front and rear of the valve can be quickly balanced. When the pressure of the water inlet pipe gradually decreases, the flap body 31 is elastically reset by the spring 34. First, the sealing of the triangular first sealing ring 32, the second sealing ring 33 and the valve body 1 is welded with a surfacing alloy. First contact, and then the sealing cladding alloy of the flap body 31 contacts the sealing cladding alloy of the valve body 1 first. This structural form effectively reduces the damage to the sealing surface caused by the mutual collision of the valve body 1 and the valve flap 3 sealing cladding alloy and the noise generated by the mutual collision, and also alleviates the excessive extrusion of the soft seal of the valve flap 3, greatly improves the wear resistance of the sealing surface and the service life of the valve, prevents water leakage in this part, and increases the reliability of the check valve. The spring 34 can automatically change the opening of the flap body 31 according to the pressure difference before and after the valve. The different operating positions of the flap body 31 can change the medium flow and pressure through the valve, thereby playing a role in regulating flow and pressure.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-channel axial flow check valve with adjustment function, characterized in that: The invention comprises a first valve body (1), a valve flap (3) and a second valve body (2), wherein one end of the first valve body (1) is fixedly connected to a water outlet pipe, one end of the second valve body (2) is fixedly connected to a water inlet pipe, and the other end of the first valve body (1) is fixedly connected to the other end of the second valve body (2). The valve flap (3) comprises a flap body (31), a first sealing ring (32), a second sealing ring (33) and a plurality of springs (34). The cross section of the flap body (31) is a T-shaped structure. The shaft of the flap body (31) is provided with a third guide hole. The lower end of the flap body (31) is provided with a plurality of springs (34). The spring (34) is connected to the interior of the second valve body (2), and a plurality of blind holes are provided at the lower end of the flap body (31) along the circumferential direction, and a spring (34) is installed in each of the blind holes. During the opening and closing process of the valve, the outer periphery of the flap body (31) is always sleeved to the inner ring of the second valve body (2), and the first sealing ring (32) and the second sealing ring (33) are installed in sequence at the upper end of the flap body (31) from the inside to the outside, and the outer periphery of the first sealing ring (32), the outer periphery of the second sealing ring (33) and the upper end of the flap body (31) are all connected to the interior of the first valve body (1); The second valve body (2) comprises a flow guide column (24), a fourth flow guide hole is provided in the middle of the flow guide column (24), the third flow guide hole is connected to the fourth flow guide hole, and a second flow guide hole is formed between the peripheral support ribs (25) of the flow guide column (24); When the pressure of the water inlet pipe gradually increases, the water flow in the water inlet pipe hits one side of the flap body (31), the spring (34) is compressed, and the water flows through the periphery of the flap body (31) to the second guide hole, and flows through the third guide hole on the shaft of the flap body (31) to the fourth guide hole, and the two channels of the flap body (31) are opened at the same time; When the pressure in the water inlet pipe gradually decreases, the flap body (31) is elastically reset by the spring (34).

2. A dual-channel axial flow check valve with adjustment function according to claim 1, characterized in that: The cross sections of the first sealing ring (32) and the second sealing ring (33) are both circular ring structures, the vertical sections of the first sealing ring (32) and the second sealing ring (33) are both triangular structures, the upper end of the petal body (31) is provided with a first ring groove and a second ring groove in sequence from the inside to the outside, the vertical sections of the first ring groove and the second ring groove are both triangular structures, the outer periphery of the first sealing ring (32) is snap-fitted into the first ring groove, the outer periphery of the second sealing ring (33) is snap-fitted into the second ring groove, and the material of the first sealing ring (32) and the second sealing ring (33) are both rubber.

3. A dual-channel axial flow check valve with an adjustment function according to claim 1, characterized in that: The first valve body (1) comprises a first tube body (11), a first flange (12), a second flange (13), a guide rib (14) and a guide plate (15); the periphery of the first end of the first tube body (11) is fixedly connected to the water outlet pipe via the second flange (13); the periphery of the second end of the first tube body (11) is fixedly connected to one end of the second valve body (2) via the first flange (12); the guide plate (15) is installed on the inner circle of the first end of the first tube body (11) via a plurality of guide ribs (14); the guide plate (15) is located in the middle of the first tube body (11); one end of the guide plate (15) is respectively contact-connected to the periphery of the first sealing ring (32), the periphery of the second sealing ring (33) and the upper end of the valve body (31).

4. A dual-channel axial flow check valve with an adjustment function according to claim 3, characterized in that: The guide plate (15) is an arc-shaped convex structure, and a plurality of guide ribs (14) are distributed in a star-shaped manner along the inner circle of the first tube body (11), one end of each guide rib (14) is fixedly connected to the outer periphery of the guide plate (15), and the other end of the guide rib (14) is fixedly connected to the inner circle of the first tube body (11), and first guide holes are formed between the guide ribs (14).

5. The dual-channel axial flow check valve with adjustment function according to claim 3, characterized in that: The second valve body (2) comprises a second pipe body (21), a third flange (22), a fourth flange (23), a flow guide column (24) and a support rib (25); the first end of the second pipe body (21) is fixedly connected to the water inlet pipe through the third flange (22); the outer periphery of the second end of the second pipe body (21) is fixedly connected to the second end of the first pipe body (11) through the fourth flange (23); the inner circle of the second end of the second pipe body (21) is fixedly connected to the outer periphery of the flow guide column (24) through a plurality of support ribs (25); the plurality of support ribs (25) are distributed in a star-shaped manner along the outer periphery of the flow guide column (24); second flow guide holes are formed between the support ribs (25); the lower end of the valve body (31) is fixedly connected to the first end of the flow guide column (24) through a plurality of springs (34); the first end of the flow guide column (24) is located in the first pipe body (11); and the second end of the flow guide column (24) is located in the second pipe body (21).

6. A dual-channel axial flow check valve with adjustment function according to claim 5, characterized in that: The second valve body (2) also includes a first ring body (26) and a second ring body (27) which are installed in sequence from the inside to the outside of the first end of the guide column (24); the first ring body (26), the second ring body (27) and the guide column (24) are coaxially arranged; the lower end of the valve body (31) is clamped to the inner ring of the second ring body (27), and each spring (34) is located between the inner ring of the second ring body (27) and the outer periphery of the first ring body (26).

7. A dual-channel axial flow check valve with adjustment function according to claim 6, characterized in that: A plurality of jet holes are evenly distributed on the side wall of the second ring body (27).

8. A dual-channel axial flow check valve with an adjustment function according to claim 6, characterized in that: The petal body (31) comprises a third ring body (311) and a fourth ring body (312), the third guide hole penetrates the third ring body (311) and the fourth ring body (312), a plurality of blind holes are arranged at the lower end of the fourth ring body (312), and the lower end of the fourth ring body (312) is clamped between the inner ring of the second ring body (27) and the outer periphery of the first ring body (26), the third ring body (311) is installed at the upper end of the fourth ring body (312), the outer diameter of the third ring body (311) is larger than the outer diameter of the fourth ring body (312), the upper end outer edge of the third ring body (311) and the annular end face of the guide plate (15) are both chamfered, the two chamfers have the same size and are symmetrically arranged, the upper end of the petal body (31) is sequentially provided with a first annular groove and a second annular groove from the inside to the outside, and the second annular groove is located in the chamfer of the third ring body (311).

9. A dual-channel axial flow check valve with an adjustment function according to claim 8, characterized in that: The annular end surface of the guide plate (15) and the upper end of the third ring body (311) are both provided with a sealing cladding alloy.

Images