One-way valve assembly

Abstract

The utility model belongs to the technical field of one-way valves, and particularly relates to a one-way valve assembly which comprises a valve body, a spherical valve core and a spring, the valve body comprises an external connection end and an internal connection end, an annular boss I is arranged on the inner wall of the external connection end, an internal thread ring is arranged on the annular boss I in a threaded mode, and an annular boss II is arranged on the inner wall of the internal thread ring. The inner wall of the inner connecting end is provided with a third annular boss, one end of the third annular boss is connected with a sealing ring in an abutting mode, the end, away from the spring, of the spherical valve element is connected with the sealing ring in an abutting mode, and the end, away from the third annular boss, of the sealing ring is connected with an end face threaded ring in an abutting mode. The end face threaded ring is in threaded connection with the inner wall of the inner connecting end. By the adoption of the modular design, parts prone to abrasion can be independently replaced, the use cost is reduced, meanwhile, abrasion between the spherical valve element and the valve body can be reduced, and the service life of the spherical valve element and the service life of the valve body are further prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of one-way valves, in particular to a one-way valve component. Background Art

[0002] The valve core of the one-way valve includes spherical valve core and conical valve core according to different application occasions. The spherical valve core has a simple structure, mature technology, easy manufacturing and maintenance, and has the advantages of large flow, small fluid resistance, good flexibility, long service life, self-tightening seal, etc. The spherical valve core is suitable for medium and low pressure, small diameter, high flow, high viscosity, and medium that is not easy to crystallize or solidify. It is widely used in chemical, petroleum, natural gas, pharmaceutical and other industries.

[0003] The spherical valve core in the one-way valve assembly is easily worn out on the surface of the valve core and the sealing surface it contacts under high-frequency operation or high-wear environment, resulting in a weakened sealing performance of the one-way valve. Although the spherical valve core in the traditional one-way valve can be replaced separately, the sealing surface in contact with the spherical valve core is usually integrated with the valve body and cannot be replaced separately, resulting in the valve body losing its function after the sealing surface is worn and having to be discarded. In addition, when the medium flows through the spring in the one-way valve assembly, the spring will vibrate under the impact of the fluid, resulting in frequent friction between the spring and the spherical valve core, and its surface is prone to rapid wear, which in turn affects the sealing performance of the one-way valve. In addition, after the spring is fatigued after long-term use, its lateral stiffness is weakened, and the vibration amplitude of the spring and the spherical valve core increases, which may also cause friction or even collision between the spherical valve core and the inside of the valve body, greatly affecting the service life of the one-way valve. Utility Model Content

[0004] The purpose of the utility model is to provide a one-way valve assembly in view of the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A one-way valve assembly comprises a valve body, a spherical valve core and a spring, the valve body comprising an external connection end and an internal connection end, the inner wall of the external connection end is provided with an annular boss 1, the annular boss 1 is threaded with an internal thread ring, the inner wall of the internal thread ring is provided with an annular boss 2, one end of the annular boss 2 is abutted against the spring, and the other end of the spring is abutted against the spherical valve core, the inner wall of the internal connection end is provided with an annular boss 3, one end of the annular boss 3 is abutted against a sealing ring, one end of the spherical valve core away from the spring is abutted against the sealing ring, one end of the sealing ring away from the annular boss 3 is abutted against an end face threaded ring, and the end face threaded ring is threadedly connected to the inner wall of the internal connection end.

[0007] Furthermore, one end of the internal thread ring close to the spherical valve core is fixedly connected to multiple limit rods, and the multiple limit rods are arranged parallel to each other and perpendicular to the end surface of the internal thread ring. The spring is connected to the inner side of the multiple limit rods, and the diameter of the spherical valve core is smaller than the outer diameter of the spring and larger than the inner diameter of the spring.

[0008] Furthermore, a plurality of openings are provided on the annular boss 2.

[0009] Furthermore, a sealing groove is provided on the outer wall of the sealing ring, an O-type sealing ring is provided in the sealing groove, and the O-type sealing ring is interference fit with the inner wall of the valve body.

[0010] Furthermore, an arc-shaped slope surface is provided at one end of the sealing ring close to the spherical valve core, and the arc-shaped slope surface is tightly matched with the spherical valve core.

[0011] Furthermore, a mounting hole is provided at one end of the end surface threaded ring away from the sealing ring.

[0012] Furthermore, two planes are cut on the outer wall of the valve body, and the two planes are arranged in parallel.

[0013] Furthermore, the inner wall of the valve body is provided with a flow expansion area, and the flow expansion area includes a cylindrical area and a truncated cone area connected thereto, and the small mouth end of the truncated cone area is connected with the channel on the inner side of the annular boss.

[0014] Furthermore, the inner ring wall of the external connection end is provided with an internal thread, and the outer ring wall of the internal connection end is provided with an external thread.

[0015] Compared with the existing technology, the advantages of this one-way valve assembly are:

[0016] 1. By threading the end face thread ring in the valve body and fixing the sealing ring in the valve body with the end face thread ring, when the contact surface between the sealing ring and the spherical valve core is worn, the sealing ring can be disassembled and replaced to ensure the sealing of the one-way valve assembly and avoid discarding the entire one-way valve assembly. The modular design allows for individual replacement of easily worn parts to reduce the cost of use.

[0017] 2. By setting multiple limit rods on the end face of the internal thread ring, the spring can be limited to prevent it from swinging due to the impact of the medium, causing the spherical valve core to collide or rub with the inner wall of the valve body, causing wear of the spherical valve core and the valve body, and further improving the service life of the spherical valve core and the valve body.

[0018] 3. By setting the flow expansion area on the inner wall of the valve body, the medium can flow from the truncated cone area into the cylindrical area after flowing out from between the spherical valve core and the sealing ring, so that the flow rate of the medium is slowed down, and the vibration effect of the spring caused by the impact of the fluid is weakened, thereby reducing the friction between the spring and the spherical valve core, reducing the wear of the spherical valve core, and further improving the service life of the spherical valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the internal structure of the one-way valve assembly provided by the utility model;

[0020] Figure 2 This is a schematic diagram of the external structure of the one-way valve assembly provided by the utility model. Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the external structure of the one-way valve assembly provided by the utility model. Figure 2 ;

[0022] Figure 4 It is a structural schematic diagram of the internal thread ring of the one-way valve assembly provided by the utility model;

[0023] Figure 5 yes Figure 4 Sectional view along AA direction.

[0024] In the figure, 1, valve body; 2, spherical valve core; 3, spring; 4, external end; 5, internal end; 6, annular boss 1; 7, internal thread ring; 8, annular boss 2; 9, annular boss 3; 10, sealing ring; 11, end face thread ring; 12, limit rod; 13, opening; 14, mounting hole; 15, plane; 16, flow expansion area; 17, O-ring. DETAILED DESCRIPTION

[0025] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0026] Reference Figures 1 to 5 A one-way valve assembly includes a valve body 1, a spherical valve core 2 and a spring 3. The valve body 1 includes an external end 4 and an internal end 5. The inner ring wall of the external end 4 is provided with an internal thread, and the outer ring wall of the internal end 5 is provided with an external thread. The internal thread and the external thread are not shown in the figure. The valve body 1 is connected to the pipeline through the internal thread and the external thread. Two planes 15 are cut out of the outer wall of the valve body 1. The two planes 15 are arranged in parallel. The two planes 15 are used to cooperate with a wrench. The valve body 1 is connected between two pipelines by turning the wrench.

[0027] An annular boss 1 6 is provided on the inner wall of the external connection end 4, and an internal threaded ring 7 is threaded on the annular boss 1 6, which can be removed from the valve body 1 by rotating the internal threaded ring 7. An annular boss 2 8 is provided on the inner wall of the internal threaded ring 7, and one end of the annular boss 2 8 is abutted against the spring 3, and the other end of the spring 3 is abutted against the spherical valve core 2. An annular boss 3 9 is provided on the inner wall of the internal connection end 5, and one end of the annular boss 3 9 is abutted against a sealing ring 10, and one end of the spherical valve core 2 away from the spring 3 is abutted against the sealing ring 10. When the side of the spherical valve core 2 away from the spring 3 is subjected to medium pressure, the spherical valve core 2 will compress the spring 3, and then the medium flows out from between the sealing ring 10 and the spherical valve core 2.

[0028] The end of the sealing ring 10 away from the annular boss 3 9 is butted against and connected with an end face threaded ring 11, and the end face threaded ring 11 is threadedly connected to the inner wall of the inner connecting end 5. The end of the end face threaded ring 11 away from the sealing ring 10 is provided with a mounting hole 14, and the mounting hole 14 can be used with a specific wrench to facilitate the installation of the end face threaded ring 11 into the inside of the valve body 1. By providing the end face threaded ring 11, the sealing ring 10 can be fixed to the inside of the valve body 1, and after the sealing ring 10 is worn, it is convenient to replace it to ensure the sealing performance of the one-way valve. The outer ring wall of the sealing ring 10 is provided with a sealing groove, and an O-type sealing ring 17 is provided in the sealing groove. The O-type sealing ring 17 has an interference fit with the inner wall of the valve body 1. The O-type sealing is used to improve the sealing performance between the sealing ring 10 and the valve body 1, and an arc slope is provided at one end of the sealing ring 10 close to the spherical valve core 2. The arc slope is tightly matched with the spherical valve core 2. By providing the arc slope, the area of ​​the sealing contact surface can be increased to further improve the sealing performance of the one-way valve.

[0029] Among them, one end of the internal thread ring 7 close to the spherical valve core 2 is fixedly connected to multiple limit rods 12, and the multiple limit rods 12 are parallel to each other and perpendicular to the end face of the internal thread ring 7. The spring 3 is connected to the inner side of the multiple limit rods 12. The diameter of the spherical valve core 2 is smaller than the outer diameter of the spring 3 and larger than the inner diameter of the spring 3. The multiple limit rods 12 limit the spring 3 to its inner side, so that the spring 3 can only be compressed or extended, thereby preventing the spherical valve core 2 from colliding with the inner wall of the valve body 1 due to its swing, thereby causing wear of the valve body 1 and the spherical valve core 2.

[0030] The annular boss 8 is provided with a plurality of openings 13, which facilitate the installation and removal of the internal threaded ring 7 by using tools such as calipers. Meanwhile, the plurality of openings 13 can reduce the obstruction of the annular boss 8 to the flow of the medium.

[0031] Among them, the inner wall of the valve body 1 is provided with a flow-through expansion area 16, which includes a cylindrical area and a truncated cone area connected thereto, and the small mouth end of the truncated cone area is connected with the channel inside the annular boss 3 9. The medium flows out from between the spherical valve core 2 and the sealing ring 10 and flows into the cylindrical area from the truncated cone area. In this process, due to the increase in space, the flow rate of the medium slows down, so that when the medium flows through the spring 3, the vibration effect caused by the fluid impact is weakened, thereby reducing the friction between the spherical valve core 2 and the wear of the spherical valve core 2. At the same time, the larger space of the flow-through expansion area 16 makes the spherical valve core 2 far away from the inner wall of the valve body 1, avoiding collision or friction between the spherical valve core 2 and the inner wall of the valve body 1, and further improving the service life of the spherical valve core 2.

[0032] When in use, first insert the O-ring 17 into the sealing groove on the sealing ring 10, then insert the sealing ring 10 from the inner end 5 of the valve body 1 until it abuts against the annular boss 3 9, and then screw the end face threaded ring 11 into the inner end 5 to fix the sealing ring 10 in the valve body 1; then insert the spherical valve core 2 from the outer end 4 of the valve body 1, and then insert the spring 3, and then screw the internal threaded ring 7 into the outer end 4 to install the spherical valve core 2 and the spring 3 in the valve body 1. At this time, the depth of the internal threaded ring 7 screwed into the outer end 4 can be adjusted as needed to adjust the compression amount of the spring 3 so that the spherical valve core 2 and the sealing ring 10 are in close contact and sealed; then the outer end 4 and the inner end 5 of the valve body 1 are respectively connected to the medium conveying pipeline. Since the inner ring wall of the outer end 4 is provided with an internal thread and the outer ring wall of the inner end 5 is provided with an external thread, it can be directly connected with the inner thread or outer thread of the pipeline. After the installation is completed, the one-way valve assembly can be used.

[0033] 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 principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A one-way valve assembly, comprising a valve body (1), a spherical valve core (2) and a spring (3), characterized in that: The valve body (1) comprises an external connection end (4) and an internal connection end (5); an annular boss 1 (6) is provided on the inner wall of the external connection end (4); the annular boss 1 (6) is threaded with an internal thread ring (7); an annular boss 2 (8) is provided on the inner wall of the internal thread ring (7); one end of the annular boss 2 (8) is abutted against a spring (3); the other end of the spring (3) is abutted against a spherical valve core (2); an annular boss 3 (9) is provided on the inner wall of the internal connection end (5); one end of the annular boss 3 (9) is abutted against a sealing ring (10); one end of the spherical valve core (2) away from the spring (3) is abutted against the sealing ring (10); one end of the sealing ring (10) away from the annular boss 3 (9) is abutted against an end face thread ring (11); the end face thread ring (11) is threadedly connected to the inner wall of the internal connection end (5).

2. A one-way valve assembly according to claim 1, characterized in that: One end of the internal thread ring (7) close to the spherical valve core (2) is fixedly connected to a plurality of limit rods (12), the plurality of limit rods (12) are parallel to each other and are arranged perpendicular to the end surface of the internal thread ring (7), the spring (3) is inscribed on the inner side of the plurality of limit rods (12), and the diameter of the spherical valve core (2) is smaller than the outer diameter of the spring (3) and larger than the inner diameter of the spring (3).

3. A one-way valve assembly according to claim 1, characterized in that: A plurality of openings (13) are provided on the annular boss 2 (8).

4. A one-way valve assembly according to claim 1, characterized in that: The outer wall of the sealing ring (10) is provided with a sealing groove, an O-type sealing ring (17) is arranged in the sealing groove, and the O-type sealing ring (17) is interference fit with the inner wall of the valve body (1).

5. A one-way valve assembly according to claim 1, characterized in that: An arc-shaped slope surface is provided at one end of the sealing ring (10) close to the spherical valve core (2), and the arc-shaped slope surface is tightly matched with the spherical valve core (2).

6. A one-way valve assembly according to claim 1, characterized in that: An installation hole (14) is provided at one end of the end surface threaded ring (11) away from the sealing ring (10).

7. A one-way valve assembly according to claim 1, characterized in that: Two planes (15) are cut out of the outer wall of the valve body (1), and the two planes (15) are arranged in parallel.

8. A one-way valve assembly according to claim 1, characterized in that: The inner wall of the valve body (1) is provided with a flow-through expansion area (16), the flow-through expansion area (16) comprising a cylindrical area and a truncated cone area connected thereto, the small opening end of the truncated cone area being connected to the channel on the inner side of the annular boss three (9).

9. A one-way valve assembly according to claim 1, characterized in that: The inner wall of the external connection end (4) is provided with an internal thread, and the outer wall of the internal connection end (5) is provided with an external thread.

Images