CN204284543U - a check valve - Google Patents

Abstract

The utility model provides a pair of check valve, it includes: the liquid inlet valve comprises a body provided with a liquid inlet channel, a valve chamber and a liquid outlet channel, wherein the liquid inlet channel and the liquid outlet channel are communicated through the valve chamber; the valve core assembly is arranged in the valve chamber and comprises an elastic part and a valve clack, one end of the elastic part is connected with the inner wall of the valve chamber, the other end of the elastic part is a free end, and the free end is abutted to the valve clack or connected with the valve clack; the valve clack has the first working position capable of sealing the liquid inlet channel and the second working position capable of opening the liquid inlet channel, and the elastic part applies the elastic force to the valve clack to maintain the first working position. The utility model aims at providing a check valve that can install with arbitrary angle.

Description

a check valve

technical field

The invention relates to the field of oil and gas exploitation, in particular to a check valve.

Background technique

At present, in the electric pump liquid supply system, the high-pressure liquid is output through the electric pump. When the system is running, due to some unpredictable events, such as power failure, the electric pump suddenly stops running, the pressure of the high-pressure liquid output in the electric pump disappears, and the high-pressure liquid connected to the outlet of the electric pump will flow back to the electric pump in reverse. The impeller of the electric pump reverses under the impact of the high-pressure liquid, and the impeller bears the impact load of the high-pressure liquid, which may loosen or damage the impeller or other parts in severe cases. When the pump is running again, the impeller may fly out, which poses a great threat to safe production. In order to solve this problem and prevent the backflow of high-pressure liquid, a check valve is generally connected to the outlet of the electric pump, and the output high-pressure liquid is prevented from flowing back to the electric pump through the check valve.

The existing check valve has a liquid inlet that allows fluid to flow into the check valve and a liquid outlet that allows fluid to flow out of the check valve. When the fluid pressure of the liquid inlet of the check valve is greater than the fluid pressure of the liquid outlet , the disc of the check valve opens under the action of the fluid, and the fluid flows from the liquid inlet to the liquid outlet; Under the action of certain factors, it will automatically close to prevent the fluid from flowing back.

This kind of check valve that relies on the self-weight of the disc to close to prevent the fluid from flowing backward has certain limitations in practical applications: the check valve cannot be installed at any angle. In the check valve in the prior art, when the valve clack is in the vertical installation position, the valve clack can quickly seat on the valve seat to close the check valve. When the valve clack is not in the vertical installation position, due to the gravity direction of the valve clack and The direction of falling is inconsistent, so that the falling force of the valve disc is reduced to the component force of the gravity of the valve disc in the falling direction of the valve disc, so that the valve disc cannot quickly fall on the valve seat to quickly close the check valve, even in some In some cases, the valve disc cannot sit on the valve seat, resulting in the failure to close the check valve and prevent the backflow of liquid.

Utility model content

The purpose of the utility model is to provide a check valve which can be installed at any angle.

The above purpose of the utility model can be achieved by adopting the following technical solutions: a check valve, which includes: a body with a liquid inlet channel, a valve chamber and a liquid outlet channel, and the liquid inlet channel and the liquid outlet channel pass through the The valve chamber is connected; the valve core assembly is arranged in the valve chamber, the valve core assembly includes an elastic member and a valve disc, one end of the elastic member is connected with the inner wall of the valve chamber, and the other end is a free end , the free end abuts against the valve clack or the free end is connected to the valve clack; the valve clack has a first working position capable of closing the liquid inlet passage and can open the liquid inlet passage the second working position, the elastic member exerts elastic force on the valve clack to maintain the first working position.

Preferably, a valve hole is provided on the side wall of the valve chamber; a valve stem that is movably arranged in the valve hole and extends into the valve chamber, and the valve stem extends into the end of the valve chamber The part is fixed with the valve flap, the elastic member is sleeved on the valve stem, and when the valve flap moves between the first working position and the second working position, the valve stem Move along the valve hole.

Preferably, a limit rod is movably arranged in the valve hole, and the limit rod is arranged in series with the valve stem and protrudes from the valve hole away from the valve stem. When the valve hole moves, the limit rod is used to limit the maximum displacement of the valve stem.

Preferably, a scale is provided on the outer surface of the limit rod.

Preferably, the liquid inlet channel is formed with a valve seat close to the valve chamber, the valve seat has a conical annular surface, and the valve disc has an arc-shaped surface facing the valve seat, when the valve disc is in the In the first working position, the valve clack sits on the valve seat and forms a linear seal.

The beneficial effect of the check valve provided by the utility model is that: the check valve provided by the utility model passes through the valve core assembly arranged in the valve chamber, the valve core assembly includes an elastic member and a valve flap, and the elastic member One end of one end is connected with the inner wall of the valve chamber, and the other end is a free end, and the free end abuts against the valve disc or the free end is connected with the valve disc; The first working position of the liquid inlet passage and the second working position capable of opening the liquid inlet passage, and the elastic member applies elastic force to the valve clack to maintain the first working position. Realized that when the fluid pressure on the side of the liquid outlet channel is greater than the fluid pressure on the side of the liquid inlet channel, the valve disc will close the liquid inlet channel under the elastic force of the elastic member, so that when the utility model provides A kind of check valve is closed by the elastic force of the elastic part in actual use, and will not be affected by the installation angle so that the valve disc cannot be seated on the valve seat. Therefore, a check valve provided by the utility model It can be installed at any angle; on the other hand, setting a scale on the limit rod realizes that when the fluid pressure on the side of the liquid inlet channel is greater than the fluid pressure on the side of the liquid outlet channel, the valve disc can be pushed under the action of the pressure difference At the same time, turn the handwheel so that the scale on the limit rod reaches the scale corresponding to the closed position of the valve clack, so that the displacement of the valve stem can be accurately controlled and the opening height of the valve clack can be controlled, so as to achieve the purpose of precisely controlling the flow.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a structural diagram of a check valve provided by the utility model;

Fig. 2 is a structural diagram of a check valve provided by the utility model.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying 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 them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1, a check valve 10 provided by the present invention includes: a body 11 having a liquid inlet passage 14, a valve chamber 18 and a liquid outlet passage 16, the liquid inlet passage 14, the liquid outlet The channel 16 communicates through the valve chamber 18; the valve core assembly 20 arranged in the valve chamber 18, the valve core assembly 20 includes an elastic member 21 and a valve disc 27, and one end 23 of the elastic member 21 is connected to the The inner wall of the valve chamber 18 is connected, and the other end 25 is a free end, and the free end abuts against the valve flap 27 or the free end is connected with the valve flap 27; The first working position of the liquid inlet channel 14 and the second working position capable of opening the liquid inlet channel 14 , the elastic member 21 applies elastic force to the valve disc 27 to maintain the first working position.

A check valve 10 provided by the utility model is provided with an elastic member 21 in the valve chamber 18, one end 23 of the elastic member 21 is fixed on the inner wall of the valve chamber 15, and the other end 25 is connected with a valve disc 27, The valve disc 27 can seal the liquid inlet channel 14, and when the fluid pressure on the side of the liquid outlet channel 16 is greater than the fluid pressure on the side of the liquid inlet channel 14, the elastic force of the valve disc 27 on the elastic member The liquid inlet channel 14 is closed under the action of the utility model, so that when the check valve 10 provided by the utility model is actually used, it is closed by the elastic force of the elastic member 21, and will not be affected by the installation angle. The valve flap 27 cannot be seated on the valve seat 19, so the check valve 10 provided by the utility model can be installed at any angle.

A check valve 10 provided by the utility model can be applied to on-site sampling of oil wells.

As shown in FIG. 1 , in this embodiment, the body 11 has a liquid inlet channel 14 , a valve chamber 18 and a liquid outlet channel 16 , and the liquid inlet channel 14 and the liquid outlet channel 16 are connected through the valve chamber 18 . Both the liquid inlet channel 14 and the liquid outlet channel 16 communicate with the external pipeline, so that the check valve 10 is connected to the external pipeline to control the fluid flowing in the external pipeline and prevent the fluid in the pipeline from flowing backward. The liquid inlet channel 14 is used for fluid to flow into the body 11 , and the liquid outlet channel 16 is used for fluid to flow out of the body 11 .

A valve core assembly 20 is arranged in the valve chamber 18, and the valve core assembly 20 includes an elastic member 21 and a valve disc 27. One end 23 of the elastic member 21 is connected to the inner wall of the valve chamber 18, and the other end 25 is a free end. The free end abuts against the valve flap 27 or is connected to the valve flap 27 . In this embodiment, the elastic member 21 is a spring, but the elastic member 21 is not limited thereto, and may also be other elements with elastic expansion and contraction functions, such as elastic sheets.

As shown in FIG. 1 , in this embodiment, a valve hole 31 is provided on the side wall of the valve chamber 18; . The valve stem 33 is movably arranged in the valve hole 31, and extends into the valve chamber 18 through the opening end 26. Block and cannot move up infinitely. The end of the valve rod 33 extending into the valve chamber 28 is connected with a valve disc 27; the valve disc 27 has a first working position that can close the liquid inlet passage 14 and a second working position that can open the liquid inlet passage 14, and the elastic member 21 The valve disc 27 exerts elastic force to maintain the first working position. The elastic member 21 is sheathed on the valve stem 33, and a free end of the elastic member 21 abuts against the valve disc 27, so that the elastic member 21 can exert elastic force on the valve disc 27, thereby maintaining the valve disc 27 at the first working position . When the fluid flows from the liquid inlet channel 14 to the liquid outlet channel 16, the pressure on one side of the liquid inlet channel 14 is greater than the pressure on the side of the liquid outlet channel 16, and the fluid flows from the liquid inlet channel 14 to the valve chamber 18, to overcome the elastic force of the elastic member 21 Therefore, the elastic member 21 is compressed, and the valve disc 27 can leave the first working position, so that the liquid inlet channel 14 can be opened to allow fluid to flow to the liquid outlet channel 16 . When the fluid pressure on the side of the liquid outlet channel 16 is greater than the fluid pressure on the side of the liquid inlet channel 14, since the elastic member 21 will return to its original shape, the valve disc 27 is quickly pushed to the first working position under the action of the elastic force of the elastic member 21 Therefore, the liquid inlet channel 14 is sealed, so the check valve 10 provided by the present invention is closed by the elastic force of the elastic member 21 in actual use, and will not be affected by the technology installed with any angle of inclination. Therefore, the check valve 10 provided by the utility model can be applied in a process with any angle of inclination.

As shown in FIG. 2 , in this embodiment, the closed end 28 of the valve hole 31 is provided with a through hole 40 . A limiting rod 34 is movably arranged in the valve hole 31 . The limiting rod 34 is arranged in series with the valve stem 33 in the valve hole 31 and extends away from the valve stem 33 from the through hole 40 to the valve hole 31 . The limiting rod 34 has a bottom 36 and a top 38, the bottom 36 protrudes radially from a protruding portion 42 suitable for the closed end 28, so that when the limiting rod 34 moves along the valve hole 31 to the closed end 28, when When the protruding portion 42 moves to the closed end 28 , it is blocked by the closed end 28 and cannot continue to move upward, thereby limiting the movement of the limiting rod 34 . When the stop rod 34 is limited and cannot move, the distance that the valve rod 33 can move to the closed end 28 along the valve hole 31 is limited thereupon, so the position of the stop rod 34 in the valve hole 31 can be set to The maximum displacement of the valve rod 33 along the valve hole 31 is controlled, so that the fluid flow from the liquid inlet channel 14 to the liquid outlet channel 16 can be controlled.

As shown in Figure 2, in this embodiment, the top 38 of the limit rod 34 is provided with a hand wheel 35, when the pressure on the side of the liquid inlet channel 14 is greater than the pressure on the side of the liquid outlet channel 16, the fluid flows from the liquid inlet channel 14 Flow to the valve chamber 18, overcome the elastic force of the elastic member 21 to push the valve disc 27, so that the valve stem 33 moves to the closed end 28 along the valve hole 31, and at the same time turn the hand wheel 35 so that the limit rod 34 also moves to the closed end 28 When the hand wheel 35 stops rotating, the movement of the limit rod 34 stops, so that the maximum height that the valve rod 33 can reach along the valve hole 31 can be controlled, that is, the maximum displacement. A scale 37 is arranged on the outer surface of the limit rod 34, and the scale 37 can accurately obtain the moving length of the limit rod 34, so that the flow from the inlet channel 14 to the outlet can be precisely controlled by the scale 37. Channel 16 traffic purpose.

As shown in FIG. 1 , in this embodiment, the liquid inlet channel 14 is formed with a valve seat 19 close to the valve chamber 18 , the valve seat 19 has a conical annular surface 29 , and the valve disc 27 has a circle facing the valve seat 19 . The arc-shaped surface 41, when the valve disc 27 is in the first working position, the valve disc 27 sits on the valve seat 19 and forms a linear seal.

As shown in FIG. 1 , in this embodiment, a hole 45 is provided on the body 11 , and a copper sleeve 43 is installed in the hole 45 and fixed with an anti-rotation screw 47 . The anti-rotation screw 47 is used to prevent the copper sleeve 43 from rotating when the hand wheel 35 rotates to drive the limit rod 34 to rotate. The sealing gland 49 compresses the sealing packing 51 to prevent the high-pressure fluid in the valve chamber 18 from overflowing from the through hole 40 of the closed end 28 of the valve hole 31 . The sealing gland 49 is fixed to the body 11 by screws.

The above are only a few embodiments of the present utility model, and those skilled in the art can make various changes or modifications to the embodiments of the present utility model according to the contents disclosed in the application documents without departing from the spirit and scope of the present utility model.

Claims (5)

1. A check valve, characterized in that it comprises: A body having a liquid inlet passage, a valve chamber and a liquid outlet passage, the liquid inlet passage and the liquid outlet passage are communicated through the valve chamber; The valve core assembly arranged in the valve chamber, the valve core assembly includes an elastic member and a valve flap, one end of the elastic member is connected to the inner wall of the valve chamber, and the other end is a free end, and the free end is connected to the inner wall of the valve chamber. The valve clack abuts or the free end is connected to the valve clack; the valve clack has a first working position capable of closing the liquid inlet passage and a second working position capable of opening the liquid inlet passage, The elastic member exerts elastic force on the valve clack to maintain the first working position. 2. The check valve according to claim 1, characterized in that: a valve hole is provided on the side wall of the valve chamber; a valve that is movably arranged in the valve hole and extends into the valve chamber rod, the end of the valve rod extending into the valve chamber is fixed to the valve disc, and the elastic member is sleeved on the valve rod, when the valve disc is in the first working position and the valve disc When moving between the second working positions, the valve stem moves along the valve hole. 3. The check valve according to claim 2, characterized in that: a limit rod is movably arranged in the valve hole, the limit rod is arranged in series with the valve stem and deviates from the valve stem Extending out of the valve hole, when the valve rod moves along the valve hole, the limit rod is used to limit the maximum displacement of the valve rod. 4. The check valve according to claim 3, characterized in that: a scale is provided on the outer surface of the limit rod. 5. The check valve according to claim 1, wherein the liquid inlet channel is formed with a valve seat close to the valve chamber, the valve seat has a conical annular surface, and the valve disc has a direction toward The arc-shaped surface of the valve seat, when the valve clack is in the first working position, the valve clack sits on the valve seat and forms a linear seal.