Innovative composite sealing one-way valve

Abstract

The utility model discloses an innovative type compound sealing one-way valve which comprises a valve body, a first sealing piece, a valve element, a spring, an outlet connector sealing piece and an outlet connector, the first sealing piece is installed inside the valve body, the spring is installed at the rear end inside the valve element, and the valve element is installed inside the valve body and located on the inner side of the first sealing piece. The outlet connector is sleeved with the outlet connector sealing piece, the outlet connector is installed at the right end of the valve body, and the left end of the outlet connector is located in the valve body. The valve element comprises a rear element body and a front element body, the rear element body and the front element body are of a smooth transition and integrated machining forming structure, the front end of the front element body is of an arc-shaped structure, the side face of the front element body is provided with a set of circulation holes which are symmetrically distributed, and the set of circulation holes and the rear element body are of a through structure. A soft and hard sealing scheme is adopted in the device, sealing is conducted through a sealing piece at low pressure, hard sealing is conducted through the valve element and the valve body at high pressure, the sealing performance is guaranteed, and meanwhile damage to the sealing piece due to long-term high pressure is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to one -way valve technical field, concretely is an innovative composite sealing one -way valve. BACKGROUND

[0002] One -way valve, also known as check valve or non -return valve, is a kind of fluid control device, its core function is to allow fluid to flow only in one direction, and prevent reverse flow, to prevent the medium loss of control from the rupture of rear pipeline. The importance of one -way valve in fluid field is self-evident. Especially in hydrogen gas circuit, one -way valve is widely used.

[0003] The existing one -way valve has the following defects:

[0004] The one -way valve on the existing market cannot meet the use demand of high-pressure gas circuit, the sealing structure is easy to damage, and there is also the situation of low-pressure (≤0.5MPa) sealing failure, at this time, gas can flow from the outlet end of one -way valve to the inlet end of one -way valve, and the function of one -way gas flow cannot be realized well.

[0005] Therefore, a solution is needed. INVENTION CONTENTS

[0006] (I) technical problem solved

[0007] In view of the deficiencies of the prior art, the utility model provides an innovative composite sealing one -way valve to solve the problems in the above background art.

[0008] (II) technical scheme

[0009] To achieve the above purpose, the utility model discloses an innovative composite sealing one -way valve, which comprises a valve body, a first sealing element, a valve core, a spring, an outlet joint sealing element and an outlet joint, the first sealing element is installed inside the valve body, the spring is installed inside the rear end of the valve core, the valve core is installed inside the valve body and is located inside the first sealing element, the outlet joint sealing element is sleeved on the outlet joint, the outlet joint is installed at the right end of the valve body, and the left end of the outlet joint is located inside the valve body;The valve core comprises a rear core body and a front core body, the rear core body and the front core body are smoothly transitioned and integrally formed, the rear core body is located at the rear end of the front core body, the rear core body is in cylindrical structure, and the inside is in through structure, the front end of the front core body is in arc structure, a group of flow-through holes are symmetrically arranged on the side surface of the front core body, and a group of flow-through holes and the rear core body are in through structure.

[0010] Preferably, the valve body comprises a threaded valve cover, a hexagonal block and an air inlet block, the threaded valve cover is in a cylindrical structure and has a through structure inside, the hexagonal block is installed outside the threaded valve cover, the air inlet block is installed at the front end of the threaded valve cover, an air inlet is formed at the front end of the air inlet block, the air inlet and the threaded valve cover are in a through structure, and a sealing installation groove is formed at the front end inside the threaded valve cover.

[0011] Preferably, the outlet joint comprises a joint pipe and a sleeve pipe, the joint pipe is in a cylindrical structure and has a through structure inside, the sleeve pipe is installed at the front end of the joint pipe, a hexagonal block is arranged outside the joint pipe, a sleeve installation groove is formed on the surface of the sleeve pipe, and the sleeve installation groove is in a circular ring structure.

[0012] (Three) beneficial effects

[0013] The utility model provides an innovative composite sealing check valve. Has the following beneficial effects:

[0014] The innovative composite sealing check valve in the scheme adopts a soft and hard sealing scheme, relies on a sealing element to seal at low pressure, and relies on hard sealing of a valve core and a valve body at high pressure, thereby ensuring sealing performance, avoiding damage to the sealing element caused by long-term high pressure, and ensuring effective and reliable sealing of the check valve at the rear end of the check valve, easy opening of the valve core, small opening pressure difference, small flow loss, simple structure, good sealing performance and long service life. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the whole structure schematic view of the utility model;

[0016] Fig. 2 It is the whole structure schematic view of the utility model closing;

[0017] Fig. 3 It is the whole structure schematic view of the utility model opening.

[0018] In the drawing, 1, valve body; 2, first sealing element; 3, valve core; 4, spring; 5, outlet joint sealing element; 6, outlet joint; 7, rear core body; 8, front core body; 9, flow-through hole; 10, threaded valve cover; 11, hexagonal block; 12, air inlet block; 13, air inlet; 14, sealing installation groove; 15, joint pipe; 16, sleeve pipe; 17, sleeve installation groove. DETAILED DESCRIPTION

[0019] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0020] Please refer to Figs. 1-3 The utility model embodiment provides a technical scheme:

[0021] Embodiment 1

[0022] For the above-mentioned problem 1 to be solved: the one-way valve in the existing market cannot meet the use demand of high-pressure gas path, the sealing structure is easy to damage, and there is also a low-pressure (≤0.5MPa) sealing failure situation, at this time, the gas can flow from the outlet end of the one-way valve to the inlet end of the one-way valve, and the function of one-way gas flow cannot be well realized.

[0023] The solution is as follows: an innovative composite sealing one-way valve, comprising a valve body 1, a first sealing member 2, a valve core 3, a spring 4, an outlet joint sealing member 5 and an outlet joint 6, the first sealing member 2 is installed inside the valve body 1, the spring 4 is installed at the rear end inside the valve core 3, the valve core 3 is installed inside the valve body 1 and located inside the first sealing member 2, the outlet joint sealing member 5 is sleeved on the outlet joint 6, the outlet joint 6 is installed at the right end of the valve body 1, and the left end of the outlet joint 6 is located inside the valve body 1;The valve core 3 comprises a rear core body 7 and a front core body 8, the rear core body 7 and the front core body 8 are smoothly transitioned and integrally formed, the rear core body 7 is located at the rear end of the front core body 8, the rear core body 7 is in a cylindrical structure, and the inside is a through structure, the front end of the front core body 8 is in an arc shape structure, a group of flow-through holes 9 are symmetrically arranged on the side surface of the front core body 8, and a group of flow-through holes 9 and the rear core body 7 are in a through structure.

[0024] The valve body 1 comprises a threaded valve cover 10, a hexagonal block 11 and an air inlet block 12, the threaded valve cover 10 is in a cylindrical structure, and the inside is a through structure, the hexagonal block 11 is installed outside the threaded valve cover 10, the air inlet block 12 is installed at the front end of the threaded valve cover 10, the air inlet block 12 is provided with an air inlet 13 at the front end, the air inlet 13 and the threaded valve cover 10 are in a through structure, and the threaded valve cover 10 is provided with a sealing installation groove 14 at the inside front end, the valve body 1 can be matched with the outlet joint 6, so as to achieve the purpose of sealing connection.

[0025] The outlet connector 6 includes a connector tube 15 and a sleeve 16. The connector tube 15 has a cylindrical structure and a through-type internal structure. The sleeve 16 is installed at the front end of the connector tube 15. The connector tube 15 has a hexagonal block 11 on its outer side. The sleeve 16 has a fitting groove 17 on its surface. The fitting groove 17 has a circular structure. The left end of the outlet connector 6 can be threaded onto the right end of the valve 3. The fitting groove 17 on the surface of the sleeve 16 is for installing the outlet connector seal 5.

[0026] Working principle: When the check valve is closed: the pressure at valve body 1 is less than the pressure at outlet connector 6. This pressure difference causes valve core 3 to contact valve body 1. At this time, the position of valve core 3 is as follows: Fig. 2 As shown, the check valve is in the closed state. When the inlet gas pressure of valve body 1 is normal pressure and the gas pressure at the rear end of outlet connector 6 is low pressure (0.5-2MPa), under the combined action of gas force and spring force, valve core 3 contacts and squeezes seal 2, causing seal 2 to fill the flow channel gap and prevent fluid from passing through the rear end. Seal 2 is responsible for the sealing effect. When the inlet gas pressure of valve body 1 is normal pressure and the gas pressure at the rear end of outlet connector 6 is high (>2MPa), the gas force is large. A simple soft sealing structure is not enough to achieve high-pressure gas sealing, and gas will be squeezed out from both sides of seal 2. However, at this time, the gas force makes valve core 3 press tightly against the sealing surface of valve body 1, and the high-pressure sealing of the check valve is achieved through the hard sealing structure. The first sealing element 2 and the valve core 3 work together through a combination of soft and hard seals to ensure the sealing performance of the check valve when it is closed. When the check valve is open: the pressure at the valve body 1 is greater than the pressure at the outlet connector 6, creating a pressure difference. When the pressure difference reaches the pre-compression force of the spring 4, the valve core 3 begins to move backward along the limiting hole of the outlet connector 6 with the gas flow until it contacts the limiting surface. Fig. 3 As shown. At this time, the gas flows from the orifice of the valve body 1 into the air gap between the valve core 3 and the outlet connector 6, then enters the air hole of the valve core 3, continues to flow along the flow channel inside the valve core to the flow channel of the outlet connector 6, and finally enters the pipeline.

[0027] The utility model discloses 1, valve body, 2, first sealing element, 3, valve core, 4, spring, 5, outlet joint sealing element, 6, outlet joint, 7, rear core body, 8, front core body, 9, flow hole, 10, threaded valve cover, 11, hexagonal block, 12, air inlet block, 13, air inlet, 14, sealing installation groove, 15, joint pipe, 16, sleeve, 17, sleeve installation groove, all parts are general standard parts or the part that the person skilled in the art knows, and its structure and principle are all known to the person skilled in the art through technical manual or through conventional experimental method, the problem solved by the utility model is that the one-way valve on the market cannot satisfy the use demand of high pressure gas circuit, and the sealing structure is easy to damage, and there is also the condition of low pressure (less than or equal to 0.5MPa) sealing failure, at this time, gas can flow from the one-way valve outlet end to the one-way valve inlet end, and the function of one-way gas flow cannot be realized well, the utility model discloses through the mutual combination of above -mentioned parts can adopt the scheme of soft and hard sealing, and when low pressure, rely on sealing element to seal, when high pressure, rely on the hard sealing of valve core and valve body, guarantee the sealing property, avoid the damage of long -term high pressure to sealing element.

[0028] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, for the person skilled in the art, obviously, the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point, the embodiment should be regarded as exemplary, and is non-restrictive, the scope of the utility model is defined by the appended claims instead of the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0029] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, the person skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be combined to form other embodiments that the person skilled in the art can understand.

Claims

1. An innovative composite sealed check valve characterized by: It includes valve body (1), first seal (2), valve core (3), spring (4), outlet joint seal (5) and outlet joint (6), the first seal (2) is installed inside the valve body (1), the spring (4) is installed inside the rear end of the valve core (3), the valve core (3) is installed inside the valve body (1) and is located inside the first seal (2), the outlet joint seal (5) is sleeved on the outlet joint (6), the outlet joint (6) is installed at the right end of the valve body (1), and the left end of the outlet joint (6) is located inside the valve body (1); The valve core (3) includes rear core body (7) and front core body (8), the rear core body (7) and the front core body (8) are smoothly transitioned and integrally formed, the rear core body (7) is located at the rear end of the front core body (8), the rear core body (7) is in cylindrical structure and the inside is through structure, the front end of the front core body (8) is in arc shape structure, a group of flow holes (9) are symmetrically arranged on the side surface of the front core body (8), and a group of flow holes (9) are in through structure with the rear core body (7).

2. An innovative composite sealed check valve according to claim 1, characterized in that: The valve body (1) includes threaded valve cover (10), hex block (11) and air inlet block (12), the threaded valve cover (10) is in cylindrical structure and the inside is through structure, the hex block (11) is installed outside the threaded valve cover (10), the air inlet block (12) is installed at the front end of the threaded valve cover (10), the air inlet block (12) is provided with air inlet (13) at the front end, the air inlet (13) is in through structure with the threaded valve cover (10), and the threaded valve cover (10) is provided with sealing installation groove (14) at the inside front end.

3. An innovative composite sealed check valve according to claim 1, characterized in that: The outlet joint (6) includes joint pipe (15) and sleeve pipe (16), the joint pipe (15) is in cylindrical structure and the inside is through structure, the sleeve pipe (16) is installed at the front end of the joint pipe (15), the hex block (11) is arranged on the outside of the joint pipe (15), the sleeve pipe (16) is provided with sleeve installation groove (17) on the surface, and the sleeve installation groove (17) is in circular ring structure.

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