Spherical sealing check valve

Abstract

The utility model relates to the technical field of valves, in particular to a spherical sealing check valve which comprises a valve body and a limiting block arranged in an inner cavity of the valve body, a top cover is detachably arranged at the top of the valve body, a lifting rod extending into the top cover is arranged at the top of the valve body in a penetrating mode, and a pressure spring is arranged between the top end of the lifting rod and the top cover. The device is characterized in that a spherical valve element attached to the limiting block is arranged at the bottom end of the lifting rod, the diameter of the spherical valve element is the same as the width of an inner cavity of the limiting block, the widest position of the spherical valve element is attached to the bottom face of a water outlet of the limiting block, and the spherical valve element is attached to the limiting block in a small area and moves upwards and deforms to enable water flow to pass through after being subjected to tiny water pressure.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely relates to a spherical sealing check valve. BACKGROUND

[0002] Check valve is the round valve clapper and relies on the weight and medium pressure to produce action to cut off the medium backflow valve, belongs to automatic valve, also called check valve, one-way valve, reflux valve or isolation valve, the valve clapper movement mode is divided into lift type and swing type, the lift type check valve is similar in structure with the stop valve, only lacks the valve rod of driving the valve clapper, when fluid enters check valve from the positive direction, if fluid flows into the valve body, reaches certain pressure, can push the valve clapper of check valve through fluid self pressure, and then makes the valve clapper no longer close the valve body, and then makes fluid can pass through smoothly, and after fluid flows through the valve body, can make the valve plate reset, and then close the valve body, thereby avoiding fluid backflow, widely used in various fluid transmission pipelines, can play the role of safe isolation.

[0003] Although the above prior art can solve the corresponding technical problems, but still has certain defects: the existing check valve controls water flow opening and closing through the up-down movement of valve plate, and there is a certain height difference between the valve plate and the valve body, the valve clapper needs to reach a certain pressure to be moved up to a certain height, and then the valve body is opened, which requires high water pressure, and when used in the pipeline with precise water flow control, it is often difficult to quickly open the valve body cavity under pressure, and the applicability is poor. UTILITY MODEL CONTENTS

[0004] The utility model aims at the defects and deficiencies of prior art, and provides a spherical sealing check valve which is sensitive to reaction and has strong applicability.

[0005] To achieve the above object, the utility model adopts the following technical scheme: a spherical sealing check valve, including the valve body and the limiting block arranged in the inner cavity of the valve body, the top of the valve body is detachably provided with a top cover, the top of the valve body is provided with a lifting rod penetrating into the top cover, a pressure spring is arranged between the top end of the lifting rod and the top cover, characterized in that: the bottom end of the lifting rod is provided with a spherical valve core abutting the limiting block, the diameter of the spherical valve core is same with the width of the inner cavity of the limiting block, the widest part of the spherical valve core abuts the bottom surface of the water outlet of the limiting block, and the spherical valve core abuts the limiting block with a small area, and moves up and deforms under slight water pressure to make water flow.

[0006] Further improvement is that: the valve body is provided with a connecting flange on both sides.

[0007] Further improvement is that the spherical valve core comprises a connecting rod fixedly connected with the bottom end of the lifting rod and a hemispherical closed bottom block arranged on the bottom surface of the connecting rod, and a hemispherical closed air bag is arranged on the bottom surface of the closed bottom block, and the closed air bag is filled with high-pressure inert gas.

[0008] Further improvement is that a deformed silica gel sleeve covering the closed bottom block is arranged between the bottom end of the connecting rod and the top surface of the closed bottom block.

[0009] Further improvement is that a sealing ring made of silica gel is sleeved on the edge of the bottom surface of the closed bottom block.

[0010] Further improvement is that a silica gel column is arranged in the inner cavity of the closed air bag and fixedly connected with the upper and lower surfaces of the closed air bag.

[0011] Further improvement is that an elliptical hollow is integrally formed in the silica gel column.

[0012] After the above technical scheme is adopted, the beneficial effects of the present application are as follows: when the water flow pressure is certain, the spherical valve core can be moved upward, the widest part of the spherical valve core is attached to the bottom surface of the water outlet of the limiting block, and the attachment surface area of the spherical valve core is very small, so that when the water flow pressure is certain, the spherical valve core can be slightly moved upward to disappear the sealing effect between the limiting block, and then the water flow can pass through, and the reaction is very sensitive, and when used in the precision pipeline, the spherical valve core can be quickly opened when the low-pressure water flow enters, and the applicability is stronger. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0014] Fig. 1 is a structure schematic view of the front view section of the check valve of the present application;

[0015] Fig. 2 is a structure schematic view of the front view section of the spherical valve core of the present application. DETAILED DESCRIPTION

[0016] The present application will be further described in combination with the drawings and specific embodiments.

[0017] Referring to Figs. 1-2The technical scheme adopted in the embodiment is shown as follows: a spherical sealing check valve, comprising a valve body 1 and a limiting block 2 arranged in the inner cavity of the valve body 1, a top cover 3 arranged at the top of the valve body 1, a lifting rod 5 penetrating through the top of the valve body 1 and extending into the top cover 3, and a pressure spring 4 arranged between the top end of the lifting rod 5 and the top cover 3, characterized in that the bottom end of the lifting rod 5 is provided with a spherical valve core 6 abutting against the limiting block 2, the spherical valve core 6 comprises a connecting rod 61 fixedly connected with the bottom end of the lifting rod 5 and a hemispherical closed bottom block 62 arranged on the bottom surface of the connecting rod 61, the bottom surface of the closed bottom block 62 is provided with a hemispherical closed air bag 64, the closed air bag 64 is filled with high-pressure inert gas, the diameter of the spherical valve core 6 is the same as the width of the inner cavity of the limiting block 2, the widest part of the spherical valve core 6 abuts against the bottom surface of the water outlet of the limiting block 2, and the small area of the spherical valve core 6 abuts against the limiting block 2, so that the spherical valve core 6 is slightly upwardly moved and deformed to allow water flow when a slight water pressure is applied, in use, the valve body 1 is connected to a pipeline, when water flow enters from the left end of the valve body, the water flow generates upward extrusion force after entering, which allows the spherical valve core 6 to be upwardly moved, the widest part of the spherical valve core 6 abuts against the bottom surface of the water outlet of the limiting block 2, and the abutting surface area of the spherical valve core 6 is very small, so that the closed effect between the spherical valve core 6 and the limiting block 2 disappears after the spherical valve core 6 is slightly upwardly moved under the water flow pressure, thereby allowing water flow, and the reaction is very sensitive, meanwhile, the extrusion force of the water flow causes the closed air bag 64 to be deformed, the closed air bag 64 is extruded and deformed in the direction of the water flow when the water flow flows, thereby increasing the space through which the water flow can pass, so that the water flow can quickly pass through, when used in a precision pipeline, the valve body 1 can be quickly opened when low-pressure water flow enters, and the applicability is stronger, and after the water flow stops flowing, the spherical valve core 6 is quickly pushed back by the elastic force of the closed air bag 64 and the elastic force of the pressure spring 4, thereby closing the valve body 1;

[0018] The valve body 1 is provided with a connecting flange 7 on both sides, which is beneficial to the installation of the check valve.

[0019] The connecting rod 61 is provided with a deformed silica gel sleeve 63 covering the closed bottom block 62 between the bottom end of the connecting rod 61 and the top surface of the closed bottom block 62, which is beneficial to the covering of the closed bottom block 62 by the silica gel sleeve 63, so that the closed bottom block 62 can be slightly upwardly moved when pressed, thereby obtaining better sensitivity.

[0020] The closed bottom block 62 is provided with a sealing ring 65 made of silica gel and sleeved on the edge of the bottom surface of the closed bottom block 62, which is beneficial to improving the sealing effect during closing.

[0021] The inner cavity of the closed air bag 64 is provided with a silica gel column 66 fixedly connected with the upper and lower surfaces of the closed air bag 64, which is beneficial to improving the rigidity of the closed air bag 64 and partitioning the closed air bag 64 left and right, so that the closed air bag 64 is more easily deformed from the side to guide the water flow.

[0022] The silicon gel column 66 is integrally formed with an elliptical hollow, which is beneficial to easily deform the silicon gel column 66, and further prevent the silicon gel column 66 from being too rigid to affect the deformation effect of the closed air bag 64.

[0023] The working principle of the utility model is: when the utility model is used, the valve body 1 is connected to the pipeline, when the water flow in the pipeline enters from the left end of the valve body, the water flow will generate upward extrusion force after entering, at this time, the spherical valve core 6 can be moved upward, the widest part of the spherical valve core 6 is attached to the bottom surface of the water outlet of the limiting block 2, and the attachment area of the spherical valve core 6 is very small, after being subjected to the water flow pressure, slightly upward movement can make the sealing effect between the spherical valve core 6 and the limiting block 2 disappear, and then the water flow passes, the reaction is very sensitive, and the extrusion force of the water flow will cause the closed air bag 64 to deform, when the water flow flows, it will be extruded and deformed in the flowing direction, and then the space through which the water flow can pass is enlarged, so that the water flow can pass quickly, when used in the precision pipeline, the valve body 1 can be quickly opened when low-pressure water flow enters, and the applicability is stronger, after the water flow stops flowing, the spherical valve core 6 can be quickly pushed back by the elasticity of the closed air bag 64 and the elasticity of the pressure spring 4, and the valve body 1 is closed.

[0024] The utility model wants to protect the structure of the product, the model of each element is not the content of the utility model protection, and is the known technology, as long as the element on the market can realize the above-mentioned function of the utility model can be used as a kind of selection application. Therefore, the model of element and other parameters are not described in detail in the utility model. The contribution of the utility model is to combine each element scientifically.

[0025] The basic principle and main features of the utility model and its advantages are shown and described above, and those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions are only to illustrate the principle of the utility model, various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed, and the scope of protection of the utility model is defined by the attached claims and their equivalents. The utility model is not described in detail, and is the known technology of those skilled in the art.

Claims

1. A spherical sealing check valve, comprising a valve body (1) and a limiting block (2) arranged in the inner cavity of the valve body (1), a top cover (3) being detachably arranged on the top of the valve body (1), a lifting rod (5) being arranged to penetrate the top of the valve body (1) and extend into the top cover (3), a pressure spring (4) being arranged between the top end of the lifting rod (5) and the top cover (3), characterized in that: The bottom end of the lifting rod (5) is provided with a spherical valve core (6) abutting against the limiting block (2), the diameter of the spherical valve core (6) is the same as the width of the inner cavity of the limiting block (2), the widest part of the spherical valve core (6) abuts against the bottom surface of the water outlet of the limiting block (2), and the small area of the spherical valve core (6) abuts against the limiting block (2) and is moved upward and deformed to make the water flow through after being subjected to slight water pressure. ​ 2. A globe-seal check valve according to claim 1, wherein: The valve body (1) is provided with a connecting flange (7) on both sides.

3. A globe-seal check valve according to claim 1, wherein: The spherical valve core (6) comprises a connecting rod (61) fixedly connected with the bottom end of the lifting rod (5) and a hemispherical closed bottom block (62) arranged on the bottom surface of the connecting rod (61), the bottom surface of the closed bottom block (62) is provided with a hemispherical closed air bag (64), and the closed air bag (64) is filled with high-pressure inert gas.

4. A globe-seal check valve according to claim 3, wherein: The connecting rod (61) is provided with a deformed silica gel sleeve (63) covering the closed bottom block (62) between the bottom end of the connecting rod (61) and the top surface of the closed bottom block (62).

5. A globe-seal check valve according to claim 3, wherein: The edge position of the bottom surface of the closed bottom block (62) is sleeved with a sealing ring (65) made of silica gel.

6. A globe-seal check valve according to claim 3, wherein: The inner cavity of the closed air bag (64) is provided with a silica gel column (66) fixedly connected with the upper and lower surfaces of the closed air bag (64).

7. A globe-seal check valve according to claim 6, wherein: The silica gel column (66) is integrally formed with an oval hollow.

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