Spring axial flow type check valve

Abstract

The utility model discloses a spring axial flow type check valve, and belongs to the technical field of valves. The device mainly comprises a pipe body; the valve body is mounted in the pipe body, and the valve body comprises a flow guide cover mounted in the pipe body; the base is mounted on one side of the flow guide cover; the adjusting column is mounted on the base; the pin shaft is mounted on the adjusting column; the valve core is mounted at one end of the pin shaft; and the spring is rotationally connected with the adjusting column. According to the spring axial flow type check valve, by arranging the adjusting column, when the spring loses enough elastic force, the check valve can be normally closed by adjusting the pre-tightening force of the spring.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a spring axial flow check valve. Background Art

[0002] A check valve, also known as a reverse flow valve, non-return valve, back pressure valve and one-way valve, is a valve that automatically opens and closes by the force generated by the flow of the medium in the pipeline. It belongs to the category of automatic valves, among which the spring axial flow check valve is a type of non-return valve.

[0003] The spring axial flow check valve is a special check valve. Its design focuses on the axial flow of the fluid to ensure that the fluid can flow smoothly in one direction in the pipeline system and close quickly in the reverse flow to prevent the medium from flowing back.

[0004] For example, the patent with publication number CN203477480U discloses a spring axial flow check valve. This patent uses a spring sleeve to protect the spring and a spring slot to fix the spring, avoiding the inconvenience caused by aging and deformation of the spring due to long-term use. Although aging and deformation of the spring are unavoidable problems, the spring protection sleeve isolates the spring from the medium in the valve body, avoiding corrosion of the medium.

[0005] During the implementation of the above-mentioned patent, the spring will continuously undergo compression and release during use, causing the spring to lose sufficient elastic force, and thus may not be able to effectively push the valve core to close, resulting in the valve being unable to be completely closed, thereby causing the fluid medium to flow back in the pipeline, affecting the normal operation of the system.

[0006] Therefore, it is necessary to provide a spring axial flow check valve to solve the above problems.

[0007] It should be noted that the above information disclosed in this Background section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute prior art. Summary of the Invention

[0008] Based on the above-mentioned problems existing in the prior art, the problem to be solved by this application is: to provide a spring axial flow check valve, which solves the problem that the spring continuously undergoes a process of compression and release, causing the spring to lose sufficient elastic force, resulting in the valve being unable to be completely closed and affecting the normal operation of the system.

[0009] The technical solution adopted by the present application to solve the technical problem is: a spring axial flow check valve, comprising:

[0010] tube body;

[0011] A valve body is installed inside the pipe body, and the valve body includes:

[0012] A flow guide cover is installed inside the tube body;

[0013] A base, which is mounted on one side of the air deflector;

[0014] an adjusting column mounted on the base;

[0015] A pin, the pin being mounted on the adjusting column;

[0016] a valve core mounted on one end of the pin;

[0017] A spring is rotatably connected to the adjusting column.

[0018] Furthermore, an inlet end is fixedly provided at one end of the tube body, and an outlet end is fixedly provided at an end of the tube body away from the inlet end.

[0019] Furthermore, a through hole is provided on the base, and the adjustment column is threadedly connected to the through hole on the base.

[0020] Furthermore, a small hole is provided on the adjustment column, and the pin shaft slides inside the small hole.

[0021] Furthermore, a handle is fixedly provided on one end of the adjustment column away from the spring.

[0022] Furthermore, a protective cover is fixedly provided at a position outside the spring between the valve core and the base;

[0023] The protective cover includes a fixed cover fixedly arranged on the base, and a sliding cover slidably arranged inside the fixed cover, and one end of the sliding cover is fixedly connected to the valve core;

[0024] Sealing rings are fixedly provided at the connections between the sliding sleeve, the fixed sleeve, the valve core and the base.

[0025] The beneficial effect of the present application is that the present application provides a spring axial flow check valve, which, by setting an adjustment column, can achieve the goal of normally closing the check valve by adjusting its pre-tightening force when the spring loses sufficient elastic force.

[0026] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0028] Figure 1 This is an overall schematic diagram of a spring axial flow check valve in this application;

[0029] Figure 2 This is a cross-sectional exploded schematic diagram of a spring axial flow check valve in this application;

[0030] Figure 3 This is an exploded diagram of the valve body;

[0031] Among them, the reference numerals in the figures are:

[0032] 1. Check valve; 2. Inlet end; 3. Pipe body; 5. Outlet end; 4. Valve body; 40. Valve core; 41. Pin shaft; 42. Spring; 43. Sealing ring; 44. Protective cover; 45. Flow guide cover; 46. Base; 47. Adjustment column; 48. Handle. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings 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 in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0035] like Figure 1-Figure 3 As shown, the present application provides a spring axial flow check valve, comprising a check valve 1, which is used to prevent the medium from flowing in the pipeline in the reverse direction;

[0036] The check valve 1 includes a tube body 3, which is used to provide a stable passage for the medium to pass through the check valve 1 smoothly. At the same time, an inlet end 2 is fixedly provided at one end of the tube body 3, and the inlet end 2 is used to introduce the medium into the tube body 3. An outlet end 5 is fixedly provided at the end of the tube body 3 away from the inlet end 2, and the outlet end 5 is used to discharge the medium inside the tube body 3.

[0037] At the same time, a valve body 4 is fixedly arranged inside the tube body 3. The valve body 4 is the main part of the check valve 1. The valve body 4 includes a flow guide 45 fixedly arranged inside the tube body 3. The flow guide 45 is used to provide a flow path for the medium, thereby reducing flow resistance and vortex, and improving the flow capacity and efficiency of the check valve 1. At the same time, a base 46 is fixedly arranged on one side of the flow guide 45. The base 46 provides stable support for the valve body 4;

[0038] A through hole is formed on the base 46, and a pin 41 is slidably provided on the through hole. A valve core 40 is fixedly provided at one end of the pin 41. The valve core 40 is used to control the flow of the medium. At the same time, the pin 41 is used to connect and support the valve core 40 to ensure that the valve core 40 can move smoothly.

[0039] At the same time, a spring 42 is sleeved on the pin 41, and the spring 42 provides the elastic force required for closing the check valve 1;

[0040] When the fluid medium flows into the check valve 1 from the inlet end 2, the fluid pressure gradually increases and pushes the valve core 40 to drive the pin 41 to move along the guide cover 45 on the base 46 toward the outlet end 5. As the fluid pressure continues to act, the valve core 40 is separated from the inlet end 2, and the check valve 1 is fully opened, allowing the fluid to pass smoothly.

[0041] When the fluid medium attempts to flow in reverse from the outlet end 5 of the check valve 1, the fluid pressure decreases. At this time, the elastic force of the spring 42 overcomes the fluid pressure, quickly pushing the valve core 40 to drive the pin 41 to move on the base 46 toward the inlet end 2 until the valve core 40 fits with the inlet end 2. Then, the check valve 1 closes the channel, effectively preventing the medium from flowing back.

[0042] At the same time, in order to prevent the spring 42 from losing its original elastic force after continuously undergoing the process of compression and release, resulting in the spring 42 being unable to push the valve core 40 to close the check valve 1;

[0043] The internal thread of the through hole on the base 46 is connected to an adjusting column 47, and a small hole is opened on the adjusting column 47, and the small hole allows the pin shaft 41 to slide inside, so as not to affect the opening and closing of the check valve 1;

[0044] The adjusting post 47 is rotatably connected to the spring 42. A handle 48 is fixedly provided at one end of the adjusting post 47 away from the spring 42. The adjusting post 47 can be driven to move along the axis on the base 46 by rotating the handle 48, thereby pushing the spring 42 to move, and then the preload force of the spring 42 can be adjusted. When the spring 42 loses its original elastic force, the preload force of the spring 42 can be adjusted to achieve automatic closing of the check valve 1.

[0045] At the same time, when the spring 42 needs to be replaced, it is only necessary to rotate the adjustment column 47 to remove the spring 42 and replace it with a new spring 42;

[0046] In order to extend the service life of the spring 42, a protective cover 44 is provided between the valve core 40 and the base 46 and outside the spring 42. The protective cover 44 is used to prevent the medium passing through the valve body 4 from entering the interior and damaging the spring 42, thereby shortening the service life.

[0047] The protective sleeve 44 includes a fixed sleeve fixedly mounted on the base 46 and a sliding sleeve slidably mounted inside the fixed sleeve. One end of the sliding sleeve is fixedly connected to the valve core 40. When the check valve 1 is opened or closed, the sliding sleeve can be driven to slide inside the fixed sleeve as the valve core 40 moves, thereby protecting the internal spring 42.

[0048] In addition, a sealing ring 43 is fixedly provided at the connection between the sliding sleeve, the fixed sleeve, the valve core 40 and the base 46, and the sealing ring 43 is used to further enhance the sealing performance.

[0049] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A spring axial flow check valve, characterized in that: include: tube body(3); A valve body (4) is installed inside the pipe body (3), and the valve body (4) comprises: A flow guide cover (45), the flow guide cover (45) is installed inside the tube body (3); A base (46), the base (46) being mounted on one side of the deflector cover (45); an adjusting column (47), the adjusting column (47) being mounted on the base (46); A pin (41), the pin (41) being mounted on the adjustment column (47); A valve core (40) is mounted on one end of the pin (41); A spring (42) is rotatably connected to the adjustment post (47).

2. The spring axial flow check valve according to claim 1, characterized in that: An inlet end (2) is fixedly provided at one end of the tube body (3), and an outlet end (5) is fixedly provided at one end of the tube body (3) away from the inlet end (2).

3. The spring axial flow check valve according to claim 1, characterized in that: A through hole is provided on the base (46), and the adjustment column (47) is threadedly connected to the through hole on the base (46).

4. The spring axial flow check valve according to claim 1, characterized in that: A small hole is provided on the adjustment column (47), and the pin (41) slides inside the small hole.

5. The spring axial flow check valve according to claim 1, characterized in that: A handle (48) is fixedly provided on one end of the adjustment column (47) away from the spring (42).

6. The spring axial flow check valve according to claim 1, characterized in that: A protective cover (44) is fixedly provided at a position outside the spring (42) between the valve core (40) and the base (46); The protective sleeve (44) includes a fixed sleeve fixedly arranged on the base (46), and a sliding sleeve slidably arranged inside the fixed sleeve, and one end of the sliding sleeve is fixedly connected to the valve core (40); A sealing ring (43) is fixedly provided at the connection between the sliding sleeve and the fixed sleeve, the valve core (40), and the base (46).

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