CN216344121U

CN216344121U - Valve pipe fitting with backflow prevention structure for petrochemical industry

Info

Publication number: CN216344121U
Application number: CN202123113291.XU
Authority: CN
Inventors: 陈战平; 黄新龙
Original assignee: Luoyang Kangfusen Petrochemical Equipment Co ltd
Current assignee: Luoyang Kangfusen Petrochemical Equipment Co ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-04-19
Anticipated expiration: 2031-12-13

Abstract

The utility model discloses a valve pipe fitting with a backflow prevention structure for petrochemical engineering, which relates to the technical field of valve pipe fittings and comprises a valve body, wherein a backflow prevention assembly is arranged inside the valve body, anti-leakage assemblies are arranged at two ends of the valve body, a sealing assembly is arranged at one side of each anti-leakage assembly, when petroleum flows in from a thread input port, a semicircular block A and a semicircular block B are extruded through the flow rate and the pressure of the petroleum, the semicircular block A and the semicircular block B are in a folded open state, the backflow prevention assemblies are positioned in a backflow prevention port and can freely lift, the petroleum is positioned at the lower end of a valve core under the self pressure of the petroleum, the valve core is driven to lift upwards to open the valve, when the flow rate of the petroleum is reduced or stopped, the semicircular block A and the semicircular block B are reset through the extrusion of a connecting spring, and the valve core falls back to the sealing port under the spring and the dead weight, so as to close the valve, the oil backflow prevention device has the advantages that the oil backflow prevention effect is achieved, and the motor damage caused by motor reverse rotation due to oil backflow is avoided.

Description

Valve pipe fitting with backflow prevention structure for petrochemical industry

Technical Field

The utility model relates to the technical field of valve pipe fittings, in particular to a valve pipe fitting with an anti-backflow structure for petrochemical industry.

Background

The valves are used for opening and closing pipelines, controlling flow direction, adjusting and controlling parameters of conveying media, and can be divided into shut-off valves, check valves, adjusting valves and the like according to functions of the valves, wherein the valves are control parts in a fluid conveying system, have the functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, shunting or overflowing and relieving pressure and the like, are used for valves of a fluid control system, and are quite various in variety and specification from the simplest stop valves to various valves used in an extremely complex automatic control system, and can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like.

The existing valve mostly has no function of backflow prevention, when transmitting petrochemical engineering or some special liquids, can cause the backward flow of liquid after the motor is closed, the motor is easily reversed by the influence of oil pressure, thereby cause the harm to motor and other equipment, and then brought economic loss for the user, secondly establish sealed rubber ring through the cover between valve and the pipe fitting and realize sealing, prevent that the oil from leaking, but in long-time frequent use, the contact site of sealed rubber ring and pipe fitting is worn and torn easily, thereby lead to the leakproofness between valve and the pipe fitting to descend, cause the oil leakage phenomenon, there is certain potential safety hazard.

In order to solve the problems, a valve pipe fitting with a backflow preventing structure for petrochemical engineering is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a valve pipe fitting with a backflow prevention structure for petrochemical industry, which works by adopting the device, so that the problems that most of existing valves in the background do not have the backflow prevention function, when the petrochemical industry or some special liquids are transmitted, liquid backflow can be caused after a motor is turned off, the motor is easily reversed under the influence of oil pressure, the motor and other equipment are damaged, and further economic loss is brought to a user are solved, then a sealing rubber ring is sleeved between the valve and the pipe fitting to realize sealing, and petroleum leakage is prevented.

A valve pipe fitting with a backflow prevention structure for petrochemical engineering comprises a valve body, wherein a backflow prevention assembly is arranged inside the valve body, anti-leakage assemblies are arranged at two ends of the valve body, and a sealing assembly is arranged at one side of each anti-leakage assembly;

the backflow prevention assembly comprises a valve cover arranged at the upper end of the valve body, a threaded hole B is formed in the upper surface of the valve cover, a screw is arranged inside the threaded hole B, a connecting pipe is arranged on the lower surface of the valve cover, and a sealing washer A is sleeved on the outer surface of the connecting pipe.

Preferably, one end of the connecting pipe is provided with a spring, one end of the spring is provided with a valve core, and the lower surface of the valve core is provided with a silica gel gasket B.

Preferably, the valve body includes screw thread input port and screw thread output port, and screw thread input port all offers the recess with the inner wall of screw thread output port, and the inside of valve body is provided with sealed notch, and the last surface of valve body has seted up the check mouth.

Preferably, the upper surface of the check opening is provided with a threaded hole A, the valve cover is in threaded connection with the threaded hole A through a screw, and the valve core is in snap connection with the sealing groove opening through a spring.

Preferably, the anti-leakage assembly comprises a threaded pipe arranged inside the threaded input port and the threaded output port, a hollow ferrule is sleeved on the outer surface of the threaded pipe, and a silica gel cushion layer is arranged inside the hollow ferrule.

Preferably, the outer surface of the threaded pipe is provided with a spring clamping block, one end of the threaded pipe is provided with a connecting pipe, the outer surface of the connecting pipe is provided with a circular groove, the inner wall of the circular groove is provided with a circular hole, and the threaded pipe is connected with the circular hole in a buckling mode through the spring clamping block.

Preferably, seal assembly is including setting up the round bar in the recess inside, and the surface of round bar cup joints and is provided with loop bar A and loop bar B, loop bar A and loop bar B and round bar swing joint, and loop bar A surface is provided with semicircle piece A, and loop bar B surface is provided with semicircle piece B.

Preferably, the outer surface of the round rod is provided with a connecting rod, the outer surface of the connecting rod is provided with a connecting spring, one end of the round rod is provided with a side rod, and the outer surface of the side rod is provided with a limiting block.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model discloses a valve pipe fitting with a backflow-preventing structure for petrochemical industry, when in use, because sealing components are arranged inside a thread input port and a thread output port, when oil flows in from the thread input port, the semicircular block A and the semicircular block B are extruded by the flow rate and the pressure of the oil, the semicircular block A and the semicircular block B are movably connected with a round rod by a sleeve rod A and a sleeve rod B, so that the semicircular block A and the semicircular block B are in a folding open state, the backflow-preventing component is positioned in a non-return port and can be freely lifted, the oil is positioned at the lower end of a valve core under the action of the self pressure of the oil, the valve core is driven to be lifted upwards to open the valve, when the flow rate of the oil is reduced or stopped, the semicircular block A and the semicircular block B are restored to original positions by the extrusion of a connecting spring, the valve core falls back to a sealing notch under the spring and self weight, so as to close the valve, the oil backflow prevention device has the advantages that the oil backflow prevention effect is achieved, and the motor damage caused by motor reverse rotation due to oil backflow is avoided.

2. The utility model discloses a valve pipe fitting with an anti-backflow structure for petrochemical engineering, when in use, an engagement pipe is sleeved in a threaded pipe, the outer surface of the threaded pipe is provided with a spring clamping block which is connected with a round hole buckle, a hollow ferrule is sleeved on the outer surface of the engagement pipe, a silica gel cushion layer is arranged in the hollow ferrule and is attached to the outer surface of the engagement pipe, the threaded pipe is in threaded connection with a threaded input port, the connection precision between a valve body and the pipe fitting is enhanced through the engagement pipe and the threaded pipe, and the silica gel cushion layer is abutted against the outer surface of the engagement pipe to prevent oil from flowing out along a connection gap between the engagement pipe and the threaded pipe.

Drawings

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

FIG. 2 is a schematic view of the valve body structure of the present invention;

FIG. 3 is a schematic view of the seal assembly of the present invention;

FIG. 4 is a schematic view of the anti-backflow assembly of the present invention;

figure 5 is a schematic view of the construction of the leakage prevention assembly of the present invention.

In the figure: 1. a valve body; 11. a threaded input port; 111. a groove; 112. sealing the notch; 12. a threaded output port; 13. a check port; 131. a threaded hole A; 2. a backflow prevention assembly; 21. a valve cover; 211. a threaded hole B; 2111. a screw; 212. a connecting pipe; 2121. sealing washer A; 22. a spring; 23. a valve core; 231. a silica gel gasket B; 3. a leakage prevention assembly; 31. a threaded pipe; 32. a hollow ferrule; 321. a silica gel cushion layer; 33. a spring clamping block; 34. connecting the pipe; 341. a circular groove; 3411. a circular hole; 4. a seal assembly; 41. a round bar; 411. a loop bar A; 4111. a semicircular block A; 412. a loop bar B; 4121. a semicircular block B; 413. a connecting rod; 4131. a connecting spring; 414. a side lever; 4141. and a limiting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to solve the problems that when petroleum is conveyed, liquid backflow can be caused after a motor is turned off, the motor is easily influenced by oil pressure to rotate reversely, and therefore damage is caused to the motor and other equipment, as shown in fig. 2-4, the following preferred technical scheme is provided:

the backflow prevention assembly 2 comprises a valve cover 21 arranged at the upper end of a valve body 1, a threaded hole B211 is formed in the upper surface of the valve cover 21, a screw 2111 is arranged inside the threaded hole B211, a connecting pipe 212 is arranged on the lower surface of the valve cover 21, a sealing washer A2121 is sleeved on the outer surface of the connecting pipe 212, a spring 22 is arranged at one end of the connecting pipe 212, a valve core 23 is arranged at one end of the spring 22, a silica gel washer B231 is arranged on the lower surface of the valve core 23, the valve body 1 comprises a thread input port 11 and a thread output port 12, grooves 111 are formed in the inner walls of the thread input port 11 and the thread output port 12, a sealing notch 112 is formed in the valve body 1, a check opening 13 is formed in the upper surface of the valve body 1, a sealing assembly 4 comprises a round rod 41 arranged inside the grooves 111, a sleeve rod A411 and a sleeve rod B412 are sleeved on the outer surface of the round rod 41, the sleeve rod A411 and the sleeve rod B412 are movably connected with the round rod 41, the outer surface of the sleeve rod A411 is provided with a semicircular block A4111, the outer surface of the sleeve rod B412 is provided with a semicircular block B4121, the outer surface of the round rod 41 is provided with a connecting rod 413, the outer surface of the connecting rod 413 is provided with a connecting spring 4131, one end of the round rod 41 is provided with a side rod 414, and the outer surface of the side rod 414 is provided with a limiting block 4141.

Specifically, when in use, because the sealing assemblies 4 are arranged inside the screw input port 11 and the screw output port 12, when oil flows in from the screw input port 11, the semi-circular block a4111 and the semi-circular block B4121 are squeezed by the flow rate and the pressure of the oil, the semi-circular block a4111 and the semi-circular block B4121 are movably connected with the round rod 41 by the sleeve rod a411 and the sleeve rod B412, so that the semi-circular block a4111 and the semi-circular block B4121 are in a folded open state, the backflow prevention assembly 2 is positioned in the backflow prevention port 13 and can freely lift, the oil is positioned at the lower end of the valve core 23 under the self pressure, the valve core 23 is driven to lift upwards to open the valve, when the flow rate of the oil is reduced or stopped, the semi-circular block a4111 and the semi-circular block B4121 are restored by the squeezing of the connecting spring 4131, the valve core 23 falls back onto the sealing notch 112 under the spring 22 and the self weight, so as to close the valve and prevent the backflow of the oil, the occurrence of motor damage caused by motor reverse rotation due to petroleum reverse flow is avoided.

In order to solve the problem that the contact part of the sealing rubber ring and the pipe fitting is easily worn in the long-time frequent use process, so that the sealing performance between the valve and the pipe fitting is reduced, as shown in fig. 1 and 5, the following preferable technical scheme is provided:

a valve pipe fitting with an anti-backflow structure for petrochemical engineering comprises a valve body 1, an anti-backflow assembly 2 is arranged inside the valve body 1, anti-leakage assemblies 3 are arranged at two ends of the valve body 1, a sealing assembly 4 is arranged at one side of each anti-leakage assembly 3, a threaded hole A131 is formed in the upper surface of a non-return port 13, a valve cover 21 is in threaded connection with the threaded hole A131 through a screw 2111, a valve core 23 is in snap connection with a sealing groove opening 112 through a spring 22, each anti-leakage assembly 3 comprises a threaded pipe 31 arranged inside a threaded input port 11 and a threaded output port 12, a hollow ferrule 32 is sleeved on the outer surface of the threaded pipe 31, a silica gel cushion 321 is arranged inside the hollow ferrule 32, a spring clamping block 33 is arranged on the outer surface of the threaded pipe 31, an adapter pipe 34 is further arranged at one end of the threaded pipe 31, a circular groove 341 is formed in the outer surface of the adapter pipe 34, and a circular hole 3411 is formed in the inner wall of the circular groove 341, the threaded pipe 31 is snap-connected to the circular hole 3411 through a spring latch 33.

Specifically, during use, the connecting pipe 34 is sleeved inside the threaded pipe 31, the outer surface of the threaded pipe 31 is provided with a spring clamping block 33 which is connected with the round hole 3411 in a buckled mode, the hollow ferrule 32 is sleeved on the outer surface of the connecting pipe 34, the inner portion of the hollow ferrule 32 is provided with a silica gel cushion 321 which is attached to the outer surface of the connecting pipe 34, the threaded pipe 31 is in threaded connection with the threaded input port 11, the connecting pipe 34 and the threaded pipe 31 are sleeved to enhance the connection precision between the valve body 1 and the pipe fitting, the silica gel cushion 321 is abutted to the outer surface of the connecting pipe 34 to prevent oil from flowing out along a connecting gap between the connecting pipe 34 and the threaded pipe 31, the connection sealing performance between the valve body 1 and the pipe fitting is enhanced through the mode, the effect of a connected sealing box is guaranteed, and meanwhile the valve pipe fitting is more flexible to detach and install.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a petrochemical is with valve pipe fitting that has anti-return structure, includes valve body (1), its characterized in that: the anti-backflow component (2) is arranged inside the valve body (1), the anti-leakage components (3) are arranged at two ends of the valve body (1), and the sealing component (4) is arranged at one side of each anti-leakage component (3);

the backflow prevention assembly (2) comprises a valve cover (21) arranged at the upper end of the valve body (1), a threaded hole B (211) is formed in the upper surface of the valve cover (21), a screw (2111) is arranged inside the threaded hole B (211), a connecting pipe (212) is arranged on the lower surface of the valve cover (21), and a sealing washer A (2121) is sleeved on the outer surface of the connecting pipe (212).

2. The valve pipe fitting with the backflow preventing structure for the petrochemical industry according to claim 1, wherein: one end of the connecting pipe (212) is provided with a spring (22), one end of the spring (22) is provided with a valve core (23), and the lower surface of the valve core (23) is provided with a silica gel gasket B (231).

3. The valve pipe fitting with the backflow preventing structure for the petrochemical industry according to claim 1, wherein: the valve body (1) comprises a thread input port (11) and a thread output port (12), grooves (111) are formed in the inner walls of the thread input port (11) and the thread output port (12), a sealing notch (112) is formed in the valve body (1), and a check opening (13) is formed in the upper surface of the valve body (1).

4. The valve pipe fitting with the backflow preventing structure for the petrochemical industry according to claim 3, wherein: the upper surface of the check opening (13) is provided with a threaded hole A (131), the valve cover (21) is in threaded connection with the threaded hole A (131) through a screw (2111), and the valve core (23) is in snap connection with the sealing notch (112) through a spring (22).

5. The valve pipe fitting with the backflow preventing structure for the petrochemical industry according to claim 3, wherein: the anti-leakage assembly (3) comprises a threaded pipe (31) arranged inside a thread input port (11) and a thread output port (12), a hollow ferrule (32) is sleeved on the outer surface of the threaded pipe (31), and a silica gel cushion layer (321) is arranged inside the hollow ferrule (32).

6. The valve pipe fitting with the backflow preventing structure for the petrochemical industry according to claim 5, wherein: the outer surface of the threaded pipe (31) is provided with a spring clamping block (33), one end of the threaded pipe (31) is provided with an engagement pipe (34), the outer surface of the engagement pipe (34) is provided with a circular groove (341), the inner wall of the circular groove (341) is provided with a circular hole (3411), and the threaded pipe (31) is connected with the circular hole (3411) in a buckling mode through the spring clamping block (33).

7. The valve pipe fitting with the backflow preventing structure for the petrochemical industry according to claim 3, wherein: the sealing component (4) comprises a round rod (41) arranged inside a groove (111), the outer surface of the round rod (41) is sleeved with a sleeve rod A (411) and a sleeve rod B (412), the sleeve rod A (411) and the sleeve rod B (412) are movably connected with the round rod (41), a semicircular block A (4111) is arranged on the outer surface of the sleeve rod A (411), and a semicircular block B (4121) is arranged on the outer surface of the sleeve rod B (412).

8. The valve pipe fitting with the backflow preventing structure for the petrochemical industry according to claim 7, wherein: the outer surface of the round rod (41) is provided with a connecting rod (413), the outer surface of the connecting rod (413) is provided with a connecting spring (4131), one end of the round rod (41) is provided with a side rod (414), and the outer surface of the side rod (414) is provided with a limiting block (4141).