Three-way reversing check valve

Abstract

The present invention discloses a three-way reversible check valve, including a valve body, the outer shape of the valve body is cross-shaped, and the top of the valve body is fixedly connected to a valve cover through a double-headed stud and a nut, the lower end surface of the valve cover has a cylindrical fixed seat, and a main valve stem arranged in a vertical direction is fixedly connected in the fixed seat through an inserted rod, the main valve stem is sleeved with a fixing piece fixedly connected to the valve body, and the fixing piece has a pressure plate clamped by the valve body and the valve cover, the main valve stem is fixed with an auxiliary valve stem coaxial with the inlet and outlet of the valve body, the end of the main valve stem is sleeved with a first valve flap, and the end of the auxiliary valve stem is sleeved with a second valve flap. In the present invention, when the valve is connected for use, the valve seat can be removed to change the check condition, and it can be used as a three-way check valve or a one-way check valve, which has strong applicability and effectively saves time and financial resources for enterprises. At the same time, as a three-way check valve, the valve has a good check effect and accurately controls the flow direction of the medium.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a three-way direction-changing check valve. Background Art

[0002] A check valve is a valve whose opening and closing parts are circular discs and which rely on their own weight and medium pressure to produce movement to block the backflow of the medium. It belongs to the category of automatic valves, also known as non-return valves, one-way valves, reflux valves or isolation valves. The function of this type of valve is to allow the medium to flow in one direction only and prevent it from flowing in the opposite direction. Usually, this valve works automatically. Under the pressure of the fluid flowing in one direction, the disc opens; when the fluid flows in the opposite direction, the fluid pressure and the self-reclosing disc of the disc act on the valve seat, thereby cutting off the flow. The existing three-way check valve can realize the function of two-way check. When one check is required and the other is required to achieve real-time conduction, the valve must be replaced.

[0003] Therefore, the present invention provides a three-way reversible check valve. Summary of the invention

[0004] The purpose of the present invention is to provide a three-way reversible check valve in order to solve the above problems.

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

[0006] The three-way reversible check valve comprises a valve body, the outer shape of the valve body is cross-shaped, and the top end of the valve body is fixedly connected to a valve cover by a double-headed stud and a nut, the lower end surface of the valve cover has a cylindrical fixing seat, and a main valve stem arranged in a vertical direction is fixedly connected in the fixing seat by an insert rod, the main valve stem is sleeved with a fixing piece fixedly connected to the valve body, and the fixing piece has a pressure plate for clamping the valve body and the valve cover, the main valve stem is fixed with an auxiliary valve stem coaxial with the inlet and outlet of the valve body, and the end sleeve of the main valve stem is sleeved with A first valve flap, the first valve flap has a first sleeve on which the end of a main valve stem is mounted, and the interior of the first sleeve has a first spring that abuts against the end of the main valve stem, the end of the auxiliary valve stem is mounted with a second valve flap, the second valve flap has a second sleeve on which the auxiliary valve stem is mounted, and the interior of the second sleeve has a second spring that abuts against the end of the auxiliary valve stem, the first valve flap abuts against a first valve seat that is inserted into the valve body and arranged in a vertical direction, and the second valve flap abuts against a second valve seat that is inserted into the valve body and arranged in a horizontal direction.

[0007] As a further description of the above technical solution:

[0008] The fixing member is a frustum-shaped member, and the bottom end of the fixing member is overfitted with the main valve stem, and the top end of the fixing member has a circular folded edge, and the folded edge is engaged with the valve body.

[0009] As a further description of the above technical solution:

[0010] The valve cavity of the valve body has a circular valve opening in the horizontal and vertical directions, the valve opening at the top is connected to the valve cover, the first valve flap corresponds to the inlet and has a first valve seat inside, and the second valve flap corresponds to the inlet and has a second valve seat inside.

[0011] As a further description of the above technical solution:

[0012] Both ends of the insert rod are fixed with clip springs.

[0013] As a further description of the above technical solution:

[0014] The first valve seat and the second valve seat both have folded edges that are clamped with the valve body.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] 1. In the present invention, when the valve is connected for use, the valve seat can be removed to change the check condition. It can be used as a three-way check valve and can also be used as a one-way check valve. It has strong applicability and effectively saves time and financial resources for enterprises. At the same time, as a three-way check valve, the valve has a good check effect and accurately controls the flow direction of the medium.

[0017] 2. In the present invention, the three-way check valve uses a fixing piece and an insert rod to fix the main valve stem, so that the main valve stem and the auxiliary valve stem are stably fixed inside the valve body, and the pressure plate plays a sealing role. At the same time, the fixing piece is fixed, and a seal is provided between the valve seat and the valve body. The valve has good sealing performance and a stable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main cross-sectional structure of the three-way reversible check valve proposed by the present invention;

[0019] Figure 2 It is a schematic diagram of the enlarged structure of part B of the three-way reversible check valve proposed in the present invention.

[0020] Legend:

[0021] 1. Valve body; 2. Valve cover; 3. Fixing part; 4. Main valve stem; 401. Auxiliary valve stem; 5. Insert rod; 6. Pressure plate; 7. First valve disc; 701. First sleeve; 8. Second valve disc; 801. Second sleeve; 9. First spring; 10. Second spring; 11. First valve seat; 12. Second valve seat; 13. Stud; 14. Nut; 15. Circlip. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] See also Figure 1-2 , including a valve body 1, the outer shape of the valve body 1 is a cross-shaped arrangement, and the top of the valve body 1 is fixedly connected to a valve cover 2 through a double-headed stud 13 and a nut 14, the lower end surface of the valve cover 2 has a cylindrical fixing seat, and a main valve stem 4 arranged in a vertical direction is fixedly connected in the fixing seat through an insertion rod 5, the main valve stem 4 is sleeved with a fixing member 3 fixedly connected to the valve body 1, and the fixing member 3 has a pressing plate 6 sandwiched between the valve body 1 and the valve cover 2, the pressing plate 6 is a circular component, and at the same time, after the pressing plate 6 is selected from a sealing material, the pressing plate 6 is a sealing component used between the valve cover 2 and the valve body 1, the main valve stem 4 is fixed with an auxiliary valve stem 401 coaxial with the inlet and outlet of the valve body 1, the end of the main valve stem 4 is sleeved with a first valve disc 7, the first valve disc 7 has a first sleeve 701 sleeved on the end of the main valve stem 4, and the first sleeve The interior of the cylinder 701 has a first spring 9 abutting against the end of the main valve stem 4, the main valve stem 4 and the first sleeve 701 are slidably matched, the end of the auxiliary valve stem 401 is sleeved with a second valve flap 8, the second valve flap 8 has a second sleeve 801 sleeved with the auxiliary valve stem 401, and the interior of the second sleeve 801 has a second spring 10 abutting against the end of the auxiliary valve stem 401, the auxiliary valve stem 401 and the second sleeve 801 are slidably matched, the first valve flap 7 abuts against a first valve seat 11 inserted into the valve body 1 in a vertical direction, and the second valve flap 8 abuts against a second valve seat 12 inserted into the valve body 1 in a horizontal direction, the first valve seat 11 and the second valve seat 12 are easy to remove, the valve can be changed into a one-way valve, or used completely in a pipeline for alternately conveying medium, effectively performing a three-way check.

[0025] Example 2

[0026] See also Figure 1-2The fixing member 3 is a frustum-shaped member, and the bottom end of the fixing member 3 is overfitted with the main valve stem 4. The top end of the fixing member 3 has a circular folded edge, and the folded edge is engaged with the valve body 1. Through the pressing of the pressure plate 6, the fixing member 3 is firmly installed inside the valve body 1. The valve cavity of the valve body 1 has a circular valve port in the horizontal and vertical directions. The valve port at the top is connected to the valve cover 2. The first valve flap 7 corresponds to the inlet and has a first valve seat 11 inside it. The second valve flap 8 corresponds to the inlet and has a second valve seat 12 inside it, so that the valve is a three-way valve. The first valve seat 11 and the second valve seat 12 both have folded edges engaged with the valve body 1. The positions where the folded edges of the first valve seat 11 and the second valve seat 12 abut against the valve body 1 have an annular sealing component. The first valve seat 11 and the second valve seat 12 are slidably engaged with the valve cavity of the valve body 1. The two ends of the plug rod 5 are fixed with a retaining spring 15, so that the plug rod 5 is stably fixed on the fixing seat at the lower end of the valve cover 2, and the sealing and stability of the valve are relatively high.

[0027] Working principle: When in use, if the valve is fully used, the flow pressure of the medium will push the first valve flap 7 and the second valve flap 8, compress the first spring 9 and the second spring 10, and realize the conduction of the valve. When the medium flows in the opposite direction, the first valve flap 7 acts on the first valve seat 11 and the second valve flap 8 acts on the second valve seat 12 under the action of the fluid pressure and the elastic force of the first spring 9 and the second spring 10, so as to realize the check of the medium; when connecting the three-way reversible check valve, the first valve seat 11 or the second valve seat 12 can be removed as needed, the first valve flap 7 or the second valve flap 8 can be removed, and the first spring 9 or the second spring 10 can be removed at the same time. At this time, the valve realizes one-way check and the other-way realizes real-time conduction.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A three-way reversible check valve, comprising a valve body (1), characterized in that: The valve body (1) is cross-shaped in shape, and the top end of the valve body (1) is fixedly connected to a valve cover (2) via a double-headed stud (13) and a nut (14); the lower end surface of the valve cover (2) has a cylindrical fixing seat, and a main valve stem (4) arranged in a vertical direction is fixedly connected to the fixing seat via an insert rod (5); a fixing member (3) fixedly connected to the valve body (1) is sleeved on the main valve stem (4), and the fixing member (3) has a pressure plate (6) for clamping the valve body (1) and the valve cover (2); an auxiliary valve stem (401) coaxial with the inlet and outlet of the valve body (1) is fixed on the main valve stem (4); the end of the main valve stem (4) is sleeved with a first valve flap (7), and the first valve flap (7) ) is provided with a first sleeve (701) on which the end of the main valve stem (4) is sleeved, and the first sleeve (701) has a first spring (9) inside which is in contact with the end of the main valve stem (4); the end of the auxiliary valve stem (401) is sleeved with a second valve flap (8); the second valve flap (8) is provided with a second sleeve (801) on which the auxiliary valve stem (401) is sleeved, and the second sleeve (801) has a second spring (10) inside which is in contact with the end of the auxiliary valve stem (401); the first valve flap (7) is in contact with a first valve seat (11) inserted in a vertical direction on the valve body (1), and the second valve flap (8) is in contact with a second valve seat (12) inserted in a horizontal direction on the valve body (1); The fixing member (3) is a frustum-shaped member, and the bottom end of the fixing member (3) is overfitted with the main valve stem (4), and the top end of the fixing member (3) has a circular folded edge, and the folded edge is engaged with the valve body (1); The valve cavity of the valve body (1) has a circular valve opening in the horizontal direction and the vertical direction, the valve opening at the top end is connected to the valve cover (2), the first valve flap (7) corresponds to the inlet and has a first valve seat (11) inside, and the second valve flap (8) corresponds to the inlet and has a second valve seat (12) inside.

2. The three-way reversible check valve according to claim 1, characterized in that: Circlips (15) are fixed to both ends of the insertion rod (5).

3. The three-way reversible check valve according to claim 2, characterized in that: The first valve seat (11) and the second valve seat (12) both have folded edges that are clamped with the valve body (1).

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