CN212536790U

CN212536790U - Check valve for petroleum

Info

Publication number: CN212536790U
Application number: CN202021069282.8U
Authority: CN
Inventors: 任松林
Original assignee: Dongying Huiyao Petroleum Equipment Co ltd
Current assignee: Dongying Huiyao Petroleum Equipment Co ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-02-12
Anticipated expiration: 2030-06-11

Abstract

The utility model provides a check valve for oil, include the valve body and install in the inside case of valve body, the valve body includes entry valve body, export valve body and case shell, it has the case recess to open on the entry valve body, the coincidence of the central line of entry valve body and export valve body, the central line of case shell has the contained angle with the central line of entry valve body. When oil flowed through the check valve from the pipeline, the pipeline diameter did not change very much, and the inside water course of check valve is the linear type, and the oil passes through the check valve, and the circulation direction does not change, and the resistance that detached to push away the case and received does not introduce extra resistance, compares with current check valve, has reduced the kinetic energy loss in the oil transportation, reduces the frictional heat that produces in the oil transportation to a certain extent, and then reduces the transportation risk.

Description

Check valve for petroleum

Technical Field

The utility model relates to a valve body specifically is a check valve for oil.

Background

The check valve is a valve type commonly used in petrochemical industry, and mainly aims to prevent backflow of fluid media in a pipeline and protect equipment and the safety of the pipeline. The existing check valve, such as the bending of the water channel inside the valve body of the lift check valve or the axial flow check valve or the sudden reduction of the diameter of the water channel, is easy to increase the resistance of flowing liquid and reduce the water flow speed, and for the flammable liquid, the resistance of the liquid is increased, the friction force is increased, the temperature of the liquid is correspondingly increased, and the danger of petroleum transportation is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a check valve for oil to solve the problem that proposes among the above-mentioned background art.

For solving the deficiencies of the prior art, the utility model provides a following technical scheme:

the check valve for petroleum comprises a valve body and a valve core arranged in the valve body, wherein the valve body comprises an inlet valve body, an outlet valve body and a valve core shell, the inlet valve body is provided with a valve core groove, the central lines of the inlet valve body and the outlet valve body are overlapped, and an included angle of 110-160 degrees is formed between the central line of the valve core shell and the central line of the inlet valve body.

As an improved scheme of the utility model: the rear end of the valve core is provided with a guide blind hole, the upper end of the valve core shell is provided with a cover plate, the cover plate is provided with a guide sleeve, and the guide sleeve is inserted into the guide blind hole.

As an improved scheme of the utility model: the center of the cover plate is provided with a through hole for fixedly mounting the guide sleeve, a support rod is mounted inside the guide sleeve, the top end of the support rod is provided with a spring guide pillar, the maximum outer diameter of the spring guide pillar is larger than the outer diameter of the guide sleeve, a spring is mounted in the guide blind hole, and the spring guide pillar is arranged in the spring.

As an improved scheme of the utility model: the inner surface of the lower end of the guide sleeve and the outer surface of the support rod are provided with threads which are matched with each other, and the rear end of the support rod is provided with a rotating groove.

As an improved scheme of the utility model: and scale marks are marked on the surface of the supporting rod, which exceeds the exposed part of the cover plate.

As an improved scheme of the utility model: the valve head of the valve core is provided with a sealing gasket, and the sealing gasket is fixed at the top end of the valve head by a fixing block.

As an improved scheme of the utility model: a sealing groove is formed in the position, coincident with the guide sleeve, of the inner surface of the guide blind hole, and a sealing ring is installed in the sealing groove.

Compared with the prior art, the beneficial effects of the utility model are that:

when oil flowed through the check valve from the pipeline, the pipeline diameter did not change very much, and the inside water course of check valve is the linear type, and the oil passes through the check valve, and the circulation direction does not change, and the resistance that detached to push away the case and received does not introduce extra resistance, compares with current check valve, has reduced the kinetic energy loss in the oil transportation, reduces the frictional heat that produces in the oil transportation to a certain extent, and then reduces the transportation risk.

Drawings

FIG. 1 is a diagram: cross-sectional view of a check valve for oil;

FIG. 2 is a diagram of: the valve core of the check valve for petroleum has a three-dimensional sectional view;

FIG. 3 is a diagram of: partial enlarged view of valve head of check valve for petroleum;

FIG. 4 is a diagram of: the part B in the figure 1 of the check valve for petroleum is enlarged;

FIG. 5 is a diagram: the part A of the check valve for petroleum is enlarged in a figure 1;

in the figure: 1-valve body, 2-valve core, 21-blind guide hole, 3-cover plate, 4-sealing gasket, 5-guide sleeve, 6-support rod, 61-rotation groove, 62-scale mark line, 63-spring guide post, 7-sealing ring, 8-spring, 9-fixing block, 10-valve body groove, 11-inlet valve body, 12-outlet valve body and 13-valve core shell.

Detailed Description

The present invention will be described in detail with reference to the following embodiments, wherein like or similar elements are designated by like reference numerals throughout the drawings or description, and wherein the shape, thickness or height of the various elements may be expanded or reduced in practical applications. The embodiments of the present invention are provided only for illustration, and not for limiting the scope of the present invention. Any obvious and obvious modifications or alterations to the present invention can be made without departing from the spirit and scope of the present invention.

Example 1

Referring to fig. 1 and 2, the present embodiment provides a check valve for petroleum, including a valve body 1 and a valve core 2 installed inside the valve body 1, where the valve body 1 includes an inlet valve body 11, an outlet valve body 12 and a valve core housing 13, the inlet valve body 11 is provided with a valve core groove 10, center lines of the inlet valve body 11 and the outlet valve body 12 are overlapped, and an included angle of 110 ° to 160 ° is formed between a center line of the valve core housing 13 and a center line of the inlet valve body 11. The structure of the valve body 1 can arrange the valve core 2 externally, when the valve core rises to the inside of the valve core shell 13, the inlet valve body 11 and the outlet valve body 12 form a complete linear pipeline, the diameter of a pipeline through which oil flows is not reduced, and resistance can be reduced.

Referring to fig. 1 and 2, a blind guide hole 21 is formed at the rear end of the valve core 2, a cover plate 3 is detachably mounted at the upper end of the valve core housing 13, a guide sleeve 5 is mounted on the cover plate 3, and the guide sleeve 5 is inserted into the blind guide hole 21 to guide the valve core 2 to move along the guide sleeve 5. Make into detachable with apron 3, the later maintenance of being convenient for, guide pin bushing 5 is for guide case 2 can stably move.

Referring to fig. 1 and 2, a through hole for fixedly mounting the guide sleeve 5 is formed in the center of the cover plate 3, the support rod 6 is mounted inside the guide sleeve 5, a spring guide post 63 is arranged at the top end of the support rod 6, the maximum outer diameter of the spring guide post is larger than that of the guide sleeve 5, a spring 8 is mounted in the guide blind hole 21, and the spring guide post 63 is arranged in the spring 8 and used for fixing one end of the spring 8 so as not to allow the spring 8 to shake left and right greatly.

Example 2

Referring to fig. 1, fig. 2 and fig. 4, the main difference from embodiment 1 is: the inner surface of the lower end of the guide sleeve 5 and the outer surface of the support rod 6 are provided with threads which are matched with each other, the rear end of the support rod 6 is provided with a rotating groove 61, the surface of the exposed part of the support rod 6, which exceeds the cover plate 3, is marked with scale marks 62, the support rod 6 can be rotated according to the scale marks 62, the compression amount of the spring 8 is adjusted, the elasticity is increased or reduced, and the valve core 2 is prevented from automatically falling back and closing due to the fact that friction force cannot depend on self gravity.

Referring to fig. 3 and 5, a sealing gasket 4 is installed at the valve head of the valve core 2, and the sealing gasket 4 is fixed at the top end of the valve core 2 by a fixing block 9. The sealing gasket 4 is made into an open and detachable installation mode, so that later maintenance is facilitated.

Referring to fig. 1, a sealing groove is formed in a position where the inner surface of the blind guiding hole 21 coincides with the guide sleeve 5, and a sealing ring 7 is installed in the sealing groove to prevent oil in the valve body from leaking outwards through the inside of the guide sleeve 5.

The utility model discloses a theory of operation is:

before the installation is used, insert with the plain screwdriver and turn to groove 61 internal rotation bracing piece 6, promote spring guide pillar 63 and move in direction blind hole 21, adjust the initial compression volume of spring 8, when case 2 can be under the dual function of dead weight and elasticity, very light fall back, the compression volume of spring 8 was the best compression volume this moment, and the position of bracing piece 6 was the optimum position this moment. The check valve is installed on a petroleum transportation pipeline, after petroleum enters the interior of the check valve from the inlet valve body 11, the valve core 2 moves obliquely upwards along the valve core shell 13 under the action of liquid pressure, the spring 8 is compressed at the moment, the check valve is opened, and the petroleum continues to flow forwards through the interior of the check valve outlet valve body 13; after the oil from the inlet valve body 11 stops being delivered, the valve core 2 is not subjected to the oil pressure from the inlet, and then falls back against the self weight of the valve core 2 and the elastic force of the spring 8 until the valve core abuts against the position of the valve body groove 10, when the oil from the outlet valve body 12 flows back, the returned oil further presses the valve core 2, and the oil cannot flow back to the inside of the inlet valve body 11.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. The check valve for petroleum is characterized by comprising a valve body (1) and a valve core (2) arranged inside the valve body (1), wherein the valve body (1) comprises an inlet valve body (11), an outlet valve body (12) and a valve core shell (13), the inlet valve body (11) is provided with a valve core groove (10), the center lines of the inlet valve body (11) and the outlet valve body (12) are superposed, and the center line of the valve core shell (13) and the center line of the inlet valve body (11) form an included angle of 110-160 degrees.

2. The check valve for petroleum according to claim 1, characterized in that the rear end of the valve core (2) is provided with a blind guiding hole (21), the upper end of the valve core housing (13) is provided with a cover plate (3), the cover plate (3) is provided with a guide sleeve (5), and the guide sleeve (5) is inserted into the blind guiding hole (21).

3. The petroleum check valve according to claim 2, characterized in that the center of the cover plate (3) is provided with a through hole for fixedly installing the guide sleeve (5), the inside of the guide sleeve (5) is provided with the support rod (6), the top end of the support rod (6) is provided with a spring guide post (63), the maximum outer diameter of the spring guide post is larger than the outer diameter of the guide sleeve (5), the guide blind hole (21) is internally provided with a spring (8), and the spring guide post (63) is arranged in the spring (8).

4. The check valve for petroleum according to claim 3, wherein the inner surface of the lower end of the guide sleeve (5) and the outer surface of the support rod (6) are provided with screw threads which are matched with each other, and the rear end of the support rod (6) is provided with a rotating groove (61).

5. The non-return valve for petroleum according to claim 4, characterized in that the surface of the support rod (6) beyond the exposed part of the cover plate (3) is marked with graduation marks (62).

6. The check valve for the oil according to the claim 1, characterized in that, the valve head of the valve core (2) is provided with a sealing gasket (4), and the sealing gasket (4) is fixed on the top end of the valve core (2) by a fixing block (9).

7. The check valve for petroleum according to claim 2, characterized in that the inner surface of the blind guiding hole (21) coincides with the guide sleeve (5) and is provided with a sealing groove, and a sealing ring (7) is arranged in the sealing groove.