Sealing type one-way valve

Abstract

The utility model discloses a sealing type one-way valve, and belongs to the technical field of one-way valves. Comprising a valve body and a heat preservation piece, the valve body comprises a valve shell, a valve cavity is formed in the valve shell, a conical cavity is formed in the bottom face of the valve shell, the valve cavity is communicated with the conical cavity, a flow guide plate is installed in the valve cavity, a blocking piece is arranged in the valve cavity and blocks the conical cavity, memory metal is installed on the bottom face of the flow guide plate, and the memory metal is elastically connected with the blocking piece; the heat preservation part comprises a pair of arc-shaped plates, the arc-shaped plates are attached to each other and form a cylinder shape, the valve shell is sleeved with the arc-shaped plates, cavities are formed in the inner walls of the arc-shaped plates, and the cavities are filled with heat preservation cotton; the sealing type one-way valve can relieve the sealing problem and the unstable working problem caused by temperature change of an existing one-way valve.

Description

TECHNICAL FIELD

[0001] The utility model relates to one -way valve technical field, concretely is a sealed one -way valve. BACKGROUND

[0002] One -way valve is the control element commonly used in fluid system, its function is to allow fluid to flow freely in one direction, and prevent fluid flow in the opposite direction. However, the existing one -way valve has certain deficiency in sealing performance.

[0003] The spring for pushing the valve core and the valve seat closely in the one -way valve, its elasticity will change with temperature change. When the working environment temperature rises, the elastic modulus of spring reduces, and the pushing force of softening valve core is insufficient, which may lead to the sealing between valve core and valve seat, and fluid leakage occurs. When the temperature decreases, the spring becomes hard, which may cause the excessive pressure of valve core to valve seat, and accelerate the wear of sealing components. SUMMARY

[0004] The utility model discloses a sealed one -way valve to solve the problem in the above -mentioned background art.

[0005] In view of the above problems, the technical scheme provided by the utility model is:

[0006] A sealed one -way valve, including valve body, heat preservation spare, the valve body includes valve shell, the inside of valve shell is equipped with valve cavity, the bottom surface of valve shell is equipped with conical cavity, the valve cavity and conical cavity are communicated, the inside of valve cavity is installed with flow guide plate, the inside of valve cavity is equipped with plugging piece, plugging piece blocks conical cavity, the bottom surface of flow guide plate is installed with memory metal, and the memory metal and plugging piece are elastically connected, memory metal and plugging piece are elastically connected, when temperature changes, memory metal can change shape, compensate the change of elastic member. When the elastic member becomes soft in temperature rise, memory metal can provide additional thrust, ensure that plugging piece and conical cavity closely adhere to each other. When the elastic member becomes hard in temperature reduction, memory metal can appropriately relieve the pressure, avoid excessive wear, so that a good sealing state is maintained all the time, effectively prevent fluid leakage. The heat preservation spare includes a pair of arc plates, a pair of arc plates are closely adhered to each other and form a cylindrical shape, a pair of arc plates are sleeved on the outside of valve shell, the inner wall of a pair of arc plates is provided with cavity, the inside of cavity is filled with heat preservation cotton, and the setting of heat preservation spare can reduce the influence of external temperature on the internal components of valve body. The cavity filled with heat preservation cotton can reduce the effect of ambient temperature fluctuation on spring, memory metal and the like, ensure their stable performance, and further ensure that the one -way valve can work normally under different temperature environments, improve the stability and reliability of work.

[0007] Further, the plug is a ball, the larger end of the conical cavity is connected with the valve cavity, the ball blocks the smaller end of the conical cavity, the ball can be pushed away by fluid in forward flow to pass through the conical cavity, and the ball can block the smaller end of the conical cavity more tightly in reverse flow, so that the one-way function is formed.

[0008] Further, the ball and the memory metal are connected with a spring, the spring provides an initial elastic force, so that the ball can stably block the conical cavity in normal state.

[0009] Further, the guide plate is internally provided with a through hole, the through hole is arranged to enable liquid to flow out of the valve shell.

[0010] Further, the valve shell is provided with threaded holes at two ends, the smaller end of the conical cavity is communicated with one of the threaded holes, and the through hole is communicated with the other threaded hole, the threaded holes facilitate connection and installation of the one-way valve with pipelines and other components, so that the assembly of the whole fluid system is more convenient, and the communication mode clearly defines the fluid inlet and outlet path, and ensures normal work of the one-way valve in the system.

[0011] Further, the inner wall of the arc-shaped plate is provided with a magnet, the arc-shaped plate is adsorbed on the outer side of the valve shell through the magnet, so that installation and dismounting of the heat preservation member are facilitated, and the heat preservation member can be conveniently removed when the valve body needs to be maintained or overhauled; and the magnet adsorption can make the heat preservation member closely adhere to the valve shell, so that heat loss is reduced.

[0012] Further, the spring, the ball and the memory metal are made of non-magnetic metal, so that the components are not interfered by a magnetic field in a magnetic field environment, the normal work of the one-way valve is affected, and stability and reliability of the one-way valve in various complex environments are ensured.

[0013] Compared with the prior art, the sealing type one-way valve has the beneficial effects that: the heat preservation member reduces the influence of external temperature change on the spring and other components in the valve body, the sealing performance and service life are improved by effectively solving the problems of sealing failure and wear of sealing components caused by temperature change in combination with the synergistic effect of the memory metal and the spring; meanwhile, the reasonable structure design makes fluid flow more smooth, installation and maintenance more convenient, the one-way valve can also adapt to a magnetic field environment, and has a wider application scenario. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Fig. 1 is a perspective view of a sealing type one-way valve according to an embodiment of the present utility model;

[0015] Figure 2 Fig. 2 is an exploded view of the sealing type one-way valve according to the embodiment of the present utility model;

[0016] Figure 3 The utility model discloses a cross section structure schematic diagram of sealed check valve.

[0017] In the drawing: 100, valve body;1001, valve shell;1002, valve cavity;1003, conical cavity;1004, threaded hole;1005, guide plate;1006, through hole;1007, memory metal;1008, spring;1009, ball;200, heat preservation part;2001, arc plate;2002, cavity. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative work belong to the scope of the utility model protection.

[0019] Please refer to Figure 1 - Figure 3 The utility model provides a technical scheme: a sealed check valve includes the following steps:

[0020] Install the guide plate 1005 in the valve cavity 1002, ensure its position accurate, the through hole 1006 and the valve cavity 1002 and threaded hole 1004 communicate smoothly, install memory metal 1007 on the bottom surface of guide plate 1005, and fix by welding or other reliable way, connect one end of spring 1008 on memory metal 1007, and connect the other end ball 1009, ensure firm connection, put the assembled components into the valve cavity 1002 as a whole, make ball 1009 align with the smaller end of conical cavity 1003, align the magnet on the inner wall of arc plate 2001 filled with heat insulation cotton with the outside of valve shell 1001, and adhere two arc plates 2001 on valve shell 1001 by magnetic force adsorption, form complete heat preservation layer.

[0021] When fluid flows from the threaded hole 1004 at one end of valve shell 1001 into valve cavity 1002, when fluid pressure is greater than the force of spring 1008 and memory metal 1007 on ball 1009, ball 1009 is pushed away, fluid flows out from the threaded hole 1004 at the other end through through hole 1006, realize forward conduction, when fluid tries to flow reversely, spring 1008 and memory metal 1007 push ball 1009 to closely adhere to the smaller end of conical cavity 1003, prevent fluid from flowing reversely, realize check function.

[0022] In different temperature environment, the memory metal 1007 will change shape. When the temperature rises, the spring 1008 becomes soft, the push force on the ball 1009 decreases, the memory metal 1007 expands to provide additional push force for the ball 1009, to ensure that the ball 1009 is tightly fitted with the tapered cavity 1003; when the temperature decreases, the spring 1008 becomes hard, the pressure on the ball 1009 may be too large, the memory metal 1007 shrinks, appropriately relieves the pressure of the ball 1009 on the tapered cavity 1003, to avoid excessive wear of the sealing parts. At the same time, the heat preservation piece 200 can reduce the influence of external temperature on the inside of the valve body 100, further stabilize the performance of the memory metal 1007 and the spring 1008.

[0023] Specifically, the working principle of the sealing type one-way valve: in use, when the fluid flows into the valve cavity 1002 from the threaded hole 1004 at one end of the valve shell 1001, when the fluid pressure is greater than the force of the spring 1008 and the memory metal 1007 on the ball 1009, the ball 1009 is pushed away, the fluid flows out from the threaded hole 1004 at the other end through the through hole 1006, realizing the positive conduction, when the fluid tries to flow in the opposite direction, the spring 1008 and the memory metal 1007 push the ball 1009 to tightly fit the smaller end of the tapered cavity 1003, to prevent the fluid from flowing in the opposite direction, realizing the one-way function; in different temperature environment, the memory metal 1007 will change shape. When the temperature rises, the spring 1008 becomes soft, the push force on the ball 1009 decreases, the memory metal 1007 expands to provide additional push force for the ball 1009, to ensure that the ball 1009 is tightly fitted with the tapered cavity 1003; when the temperature decreases, the spring 1008 becomes hard, the pressure on the ball 1009 may be too large, the memory metal 1007 shrinks, appropriately relieves the pressure of the ball 1009 on the tapered cavity 1003, to avoid excessive wear of the sealing parts. At the same time, the heat preservation piece 200 can reduce the influence of external temperature on the inside of the valve body 100, further stabilize the performance of the memory metal 1007 and the spring 1008.

Claims

1. A sealed check valve characterized by, Comprising; A valve body (100) comprises a valve shell (1001), an inside of the valve shell (1001) is provided with a valve cavity (1002), a bottom surface of the valve shell (1001) is provided with a conical cavity (1003), the valve cavity (1002) and the conical cavity (1003) are communicated, an inside of the valve cavity (1002) is provided with a flow guide plate (1005), the inside of the valve cavity (1002) is provided with a blocking piece, the blocking piece blocks the conical cavity (1003), a bottom surface of the flow guide plate (1005) is provided with a memory metal (1007), and the memory metal (1007) and the blocking piece are elastically connected; A heat preservation piece (200) comprises a pair of arc-shaped plates (2001), the pair of arc-shaped plates (2001) are mutually adhered and form a cylindrical shape, the pair of arc-shaped plates (2001) are sleeved outside the valve shell (1001), inner walls of the pair of arc-shaped plates (2001) are provided with cavities (2002), and the cavities (2002) are filled with heat preservation cotton.

2. A sealed check valve according to claim 1, wherein The blocking piece is a clamping ball (1009), one end of the conical cavity (1003) with a larger radius is connected with the valve cavity (1002), and the clamping ball (1009) blocks one end of the conical cavity (1003) with a smaller radius.

3. A sealed check valve according to claim 2, wherein The clamping ball (1009) and the memory metal (1007) are connected with a spring (1008).

4. A sealed check valve according to claim 1, wherein The flow guide plate (1005) is provided with a through hole (1006) in the inside.

5. A sealed check valve according to claim 4, wherein Both ends of the valve shell (1001) are provided with threaded holes (1004), one end of the conical cavity (1003) with a smaller radius is communicated with one of the threaded holes (1004), and the through hole (1006) is communicated with the other threaded hole (1004).

6. A sealed check valve according to claim 1, wherein The arc-shaped plates (2001) are provided with magnets on the inner walls, and the arc-shaped plates (2001) are adsorbed outside the valve shell (1001) through the magnets.

7. A sealed check valve according to claim 3, wherein The spring (1008), the clamping ball (1009) and the memory metal (1007) are all made of non-magnetic metal.

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