CN212718205U

CN212718205U - Backflow prevention device for oilfield water injection

Info

Publication number: CN212718205U
Application number: CN202020895702.1U
Authority: CN
Inventors: 刘博�
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-03-16
Anticipated expiration: 2030-05-25

Abstract

The utility model relates to a pipeline anti-backflow device field especially relates to an oil field water injection is with anti-backflow device, include: the emergency safety valve comprises a valve body, a top cover, an emergency bolt, a non-return plug, a spring and a safety bolt; the inner space of the valve body is provided with a water inlet cavity and a water injection cavity; a check port is arranged between the water inlet cavity and the water injection cavity; by adopting the utility model, the vent hole is arranged, so that the check plug can slide smoothly in the sliding groove; the emergency bolt provides a manual mode, so that water delivery and water delivery under economic conditions are facilitated; the safety plug is arranged, so that the backflow prevention effect is improved, a layer of guarantee is provided, and the longer practical service life of the device is provided; the buffer hole is convenient for smooth water flow under small water pressure, and the overflowing hole is also convenient for push-pull operation of the safety plug.

Description

Backflow prevention device for oilfield water injection

Technical Field

The utility model relates to a pipeline anti-backflow device field especially relates to an oil field water injection is with anti-backflow device.

Background

The backflow prevention device is used on pipelines in the industries of petroleum, chemical engineering and the like and is used for cutting off liquid in the pipelines, the check valve is an economical scheme and cannot solve some emergency situations, for example, the check valve only can play a one-way check role in the use process, and when the function of the check valve is not needed, the existing lifting check valve is better realized, and the function is single; moreover, most check valves or backflow prevention devices, valve cores or valve clacks also have single functions, and are inconvenient for mode switching.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prevent backflow device that refluence is efficient, and the emergency treatment of being convenient for opens valve clack, multiple mode of preventing flowing backwards.

The utility model provides an oil field water injection is with preventing flow reversal device, includes: the emergency safety valve comprises a valve body, a top cover, an emergency bolt, a non-return plug, a spring and a safety bolt;

the inner space of the valve body is provided with a water inlet cavity and a water injection cavity; a check port is arranged between the water inlet cavity and the water injection cavity;

the top cover is covered on the valve body, the bottom of the top cover is provided with a sliding groove, and the top cover is provided with a vent hole leading to the sliding groove; the upper end of the non-return plug extends into the sliding groove to be in sliding contact with the sliding groove, the lower end of the non-return plug is abutted against the non-return opening, a cavity is formed in the upper end of the non-return plug, and a buffer hole is formed in the lower end of the non-return plug; the spring is wound at the upper end of the non-return plug, the upper end of the spring is abutted against the top cover, and the lower end of the spring is abutted against the non-return plug;

the emergency bolt penetrates through the top cover and extends into the cavity of the check plug through the sliding groove, and the opening and closing of the check plug can be manually controlled through the emergency bolt;

the safety plug penetrates into the valve body from the bottom of the valve body, and when the upper end of the safety plug is abutted against the bottom of the check plug, the upper end of the safety plug is also provided with a overflowing hole.

Furthermore, the emergency bolt comprises a pull ring, a pull rod and a limiting head, wherein the pull ring is arranged at the upper end of the pull rod and extends out of the top cover, the limiting head is arranged at the lower end of the pull rod and extends into the cavity of the check plug, and the size of the limiting head is larger than that of a through hole formed by the pull rod penetrating through the cavity; the positions of the overflowing holes and the positions of the buffer holes are staggered without overlapping, and the liquid leakage condition cannot occur.

Furthermore, the safety plug is also provided with an ejector rod, and the ejector rod is connected with the upper end head and the lower end head of the safety plug; the lower rod is connected with the lower end face of the safety plug, and when the upper end face of the safety plug is abutted to the bottom of the check plug, the upper end face of the lower end face of the safety plug is just abutted to the bottom of the valve body.

Furthermore, the water inlet end of the water inlet cavity is provided with a first filter screen.

Furthermore, a second filter screen is arranged at the water outlet end of the water injection cavity.

The utility model has the advantages that:

in the specific working process of the utility model, under the normal working state, after the checking is confirmed, the safety plug is pulled down, the upper end moves down, the non-return port is opened, the water inlet cavity of the valve body is used for flowing water injected into the oil field, the water is continuously injected, the flow rate and the water pressure of the water flow are further increased, after the hydraulic pressure is increased, the non-return plug is jacked, the water flow flows into the water injection cavity, the non-return plug is jacked by the elastic reaction force of the spring, but under the normal condition, the water flow pressure is possibly unstable, the hydraulic pressure which can influence the water flow jacks the non-return plug, the non-return plug is provided with a buffer hole, the pressure of the water flow pressure which can relieve the sudden change to the non-return plug is ensured; the vent hole formed in the top cover is used for balancing atmosphere when the check plug moves in the sliding groove, so that the check plug moves more smoothly; when special conditions are met, the water supply pressure is insufficient or emergency conditions exist, the emergency bolt can be pulled up, and in a manual mode, the check plug is pulled up manually, and the waterway is opened; when the water inlet cavity needs to be closed, the safety plug is pushed, the upper end head pushes against the check port, and the water inlet cavity is closed; the overflow hole is formed in the upper end head, so that the safety plug can be conveniently lifted from the outside, the influence of the water pressure of the water flow received by the upper end head in the water inlet cavity is reduced, the positions of the overflow hole and the buffer hole cannot be overlapped, the overflow hole and the buffer hole are abutted to form sealing, and finally the valve body is closed;

by adopting the utility model, the vent hole is arranged, so that the check plug can slide smoothly in the sliding groove; the emergency bolt provides a manual mode, so that water delivery and water delivery under economic conditions are facilitated; the safety plug is arranged, so that the backflow prevention effect is improved, a layer of guarantee is provided, and the longer practical service life of the device is provided; the buffer hole is convenient for smooth water flow under small water pressure, and the overflowing hole is also convenient for push-pull operation of the safety plug.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic enlarged view of a part a of the present invention;

fig. 3 is an overall top view schematic diagram of the present invention;

reference numerals: 1-valve body, 2-top cover, 21-vent hole, 22-sliding groove, 3-emergency bolt, 31-pull ring, 32-pull rod, 33-limiting head, 4-check plug, 41-cavity, 42-overflowing hole, 5-spring, 6-safety bolt, 61-lower end, 62-ejector rod, 63-upper end, 64-overflowing hole, 7-water inlet cavity, 8-water injection cavity, 9-first filter screen, 10-second filter screen and 11-check hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1 to 3, a backflow prevention device for oilfield flooding, comprising: the emergency safety valve comprises a valve body 1, a top cover 2, an emergency bolt 3, a check plug 4, a spring 5 and a safety bolt 6;

a water inlet cavity 7 and a water injection cavity 8 are arranged in the inner space of the valve body 1; a check port 11 is arranged between the water inlet cavity 7 and the water injection cavity 8;

the top cover 2 is covered on the valve body 1, the bottom of the top cover 2 is provided with a sliding groove 22, and the top cover 2 is provided with a vent hole 21 leading to the sliding groove 22; the upper end of the check plug 4 extends into the sliding groove to be in sliding contact, the lower end of the check plug 4 is abutted against the check port 11, a cavity 41 is arranged inside the upper end of the check plug 4, and a buffer hole 42 is formed in the lower end of the check plug; the spring 5 is wound at the upper end of the check plug 4, the upper end of the spring 5 is abutted against the top cover 2, and the lower end of the spring 5 is abutted against the check plug 4;

the emergency bolt 3 penetrates through the top cover 2 and extends into the cavity 41 of the check plug 4 through the sliding groove 22, and the opening and closing of the check plug 4 can be manually controlled through the emergency bolt 3;

the safety plug 6 penetrates into the valve body 1 from the bottom of the valve body 1, and when the upper end 63 of the safety plug 6 is abutted against the bottom of the check plug 4, the upper end 63 of the safety plug 6 is also provided with a overflowing hole 64; the positions of the overflowing holes 64 and the buffer holes 42 are staggered without overlapping, and liquid leakage is avoided.

The utility model discloses in the concrete working process, under the normal operating condition, after confirming the inspection, open and pull down the safety catch 6, upper end 63 moves down, opens non return port 11, and the income water cavity 7 of valve body 1 is used for flowing in the water of pouring to the oil field, and water is continuously poured into, and the velocity of flow and the water pressure of rivers further increase, and after the hydraulic pressure increase, with non return stopper 4 jacking, rivers flow into water injection chamber 8, non return stopper 4 is pushed up by the elasticity reaction force of spring 5 down, but because under the normal condition, water pressure probably is unstable, can influence the hydraulic pressure jack-up non return stopper 4 of rivers, is provided with buffer hole 42 on non return stopper 4, alleviates the pressure of the water pressure of sudden change to non return stopper 4, guarantees that little water pressure can lead to water, and big water pressure does not influence non return stopper 4 of sudden; the vent hole 21 formed in the top cover 2 is used for balancing atmosphere when the check plug 4 moves in the sliding groove 22, so that the check plug 4 moves more smoothly; when special conditions are met, the water supply pressure is insufficient or the emergency condition occurs, the emergency bolt 3 can be pulled up, and in a manual mode, the check plug 4 is pulled up manually to open the waterway; when the water inlet cavity needs to be closed, the safety plug 6 is pushed, the upper end head 63 props against the check port 11, and the water inlet cavity 7 is closed; the upper end 63 is provided with the overflowing hole 64, so that the safety plug 6 is conveniently lifted from the outside, the influence of water pressure of water flow received by the upper end 63 in the water inlet cavity 7 is reduced, the overflowing hole 64 and the buffer hole 42 cannot be overlapped, and after the overflowing hole 64 and the buffer hole 42 are abutted, sealing is formed, and the valve body 1 is finally closed.

By adopting the utility model, the vent hole 21 is arranged, so that the non-return plug 4 can slide smoothly in the sliding groove 22; the emergency bolt 3 provides a manual mode, so that water delivery and water delivery under economic conditions are facilitated; the safety plug 6 is arranged, so that the backflow prevention effect is improved, a layer of guarantee is provided, and the longer practical service life of the device is provided; the buffer hole 42 facilitates the smooth flow of water under a small water pressure, and the overflowing hole 64 also facilitates the push-pull operation of the safety plug 6.

Referring to fig. 1-3, a backflow prevention device for oilfield flooding, further, the emergency bolt 3 includes a pull ring 31, a pull rod 32 and a limiting head 33, the pull ring 31 is disposed at the upper end of the pull rod 32 and extends out of the top cap 2, the limiting head 33 is disposed at the lower end of the pull rod 32 and extends into the cavity 41 of the check plug 4, and the size of the limiting head 33 is larger than the through hole of the pull rod 32 passing through the cavity 41;

in this embodiment, further, the safety catch 6 is further provided with a top rod 62, and the top rod 62 is connected with an upper end 63 and a lower end 61 of the safety catch 6; the lower rod is connected, and when the upper end 63 of the safety plug 6 is abutted against the bottom of the check plug 4, the upper end surface of the lower end 61 of the safety plug 6 is just abutted against the bottom of the valve body 1.

In this embodiment, further, a first filter screen 9 is disposed at a water inlet end of the water inlet cavity 7; for filtering the silt impurities flowing into the inlet chamber 7.

In this embodiment, further, a second filter screen 10 is disposed at a water outlet end of the water injection cavity 8; and prevents the foreign particles flowing back into the valve body 1.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope and spirit of the invention as defined by the accompanying claims.

Claims

1. The utility model provides an oil field water injection is with preventing flow reversal device which characterized in that includes: the emergency safety valve comprises a valve body (1), a top cover (2), an emergency bolt (3), a check plug (4), a spring (5) and a safety bolt (6);

a water inlet cavity (7) and a water injection cavity (8) are arranged in the inner space of the valve body (1); a check port (11) is arranged between the water inlet cavity (7) and the water injection cavity (8);

the top cover (2) is covered on the valve body (1), a sliding groove (22) is formed in the bottom of the top cover (2), and a vent hole (21) leading to the sliding groove (22) is formed in the top cover (2); the upper end of the check plug (4) extends into the sliding groove to be in sliding contact, the lower end of the check plug is abutted against the check opening (11), a cavity (41) is arranged inside the upper end of the check plug (4), and a buffer hole (42) is formed in the lower end of the check plug; the spring (5) is wound at the upper end of the check plug (4), the upper end of the spring (5) is abutted against the top cover (2), and the lower end of the spring (5) is abutted against the check plug (4);

the emergency bolt (3) penetrates through the top cover (2) and extends into the cavity (41) of the check plug (4) through the sliding groove (22), and the opening and closing of the check plug (4) can be manually controlled through the emergency bolt (3);

the safety plug (6) penetrates into the valve body (1) from the bottom of the valve body (1), and when an upper end head (63) of the safety plug (6) is abutted against the bottom of the check plug (4), an overflowing hole (64) is also formed in the upper end head (63) of the safety plug (6); the positions of the overflowing holes (64) and the buffer holes (42) are staggered without overlapping, and liquid leakage is avoided.

2. The oilfield water injection backflow prevention device according to claim 1, wherein the emergency bolt (3) comprises a pull ring (31), a pull rod (32) and a limiting head (33), the pull ring (31) is arranged at the upper end of the pull rod (32) and extends out of the top cover (2), the limiting head (33) is arranged at the lower end of the pull rod (32) and extends into the cavity (41) of the check plug (4), and the size of the limiting head (33) is larger than the through hole of the pull rod (32) penetrating through the cavity (41).

3. The backflow prevention device for oilfield water injection according to claim 2, wherein the safety plug (6) is further provided with a top rod (62), and the top rod (62) is connected with an upper end head (63) and a lower end head (61) of the safety plug (6); when the upper end head (63) of the safety plug (6) is abutted against the bottom of the check plug (4), the upper end face of the lower end head (61) of the safety plug (6) is just abutted against the bottom of the valve body (1).

4. The anti-backflow device for oilfield water injection according to claim 3, wherein the water inlet end of the water inlet cavity (7) is provided with a first filter screen (9).

5. The anti-backflow device for oilfield water injection according to claim 3, wherein a second filter screen (10) is arranged at the water outlet end of the water injection cavity (8).