Pressure-controlled flow stabilizing valve

Abstract

The utility model relates to the technical field of fluid control equipment, in particular to a pressure control flow stabilizing valve which comprises a valve body and a middle transmission part, an adjusting cavity is arranged in the valve body, two elastic pipelines with variable diameter characteristics are arranged in the adjusting cavity, and the middle transmission part is arranged in the adjusting cavity. The valve body is provided with two elastic pipelines, the two elastic pipelines and the arc-shaped inner wall of the adjusting cavity form a fixed contact interface in the axial direction, the two elastic pipelines are a liquid conveying hose and an auxiliary backflow hose respectively, and the valve body is further provided with a two-way fluid port communicated with the connecting position of the liquid conveying hose and the auxiliary backflow hose. According to the automatic flow control valve, through the extrusion effect of the middle transmission piece on the elastic pipelines, the circulation sectional area of the infusion hose and the circulation sectional area of the auxiliary backflow hose are automatically adjusted when the system pressure changes, a closed-loop flow control loop is formed, and self-adjustment of flow and overload protection are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid control equipment technical field especially is related to pressure control steady flow valve. BACKGROUND

[0002] In modern industry, medical treatment, new energy and the like field, the application of closed loop circulation system is increasingly widespread, such as the heat management system of new energy automobile, the constant temperature circulation system of precision instrument, the fluid delivery system of medical equipment and the like, these systems usually need to carry out stable control to the flow of circulating fluid to ensure that the equipment normally operates and the performance is stable.

[0003] At present, common flow control mode mainly includes throttle valve control, regulating valve control and electronic flow controller control. Throttle valve adjusts flow by changing flow area, but when system pressure fluctuates, its flow control precision is poor, cannot realize self-regulation, and lacks overload protection, when abnormal pressure appears in the system, cannot adjust flow in time to protect circulating pump, easy to cause equipment damage. UTILITY MODEL CONTENTS

[0004] The utility model provides pressure control steady flow valve to solve the problem in prior art.

[0005] The technical problem solved by the utility model is realized by the following technical scheme:

[0006] Pressure control steady flow valve, including valve body and intermediate transmission part, the inside of valve body is equipped with adjusting cavity, the inside of adjusting cavity is equipped with two elastic pipelines with variable diameter characteristics, and along its axial direction respectively with the fixed contact interface of adjusting cavity arc inner wall is formed, two elastic pipelines are respectively infusion hose and auxiliary return hose, and the valve body is equipped with still with infusion hose and auxiliary return hose intercommunication's two-way fluid port that intercommunication of connecting place is connected, intermediate transmission part is equipped with valve body and is located between two elastic pipelines, the radial force of elastic pipeline expansion deformation is converted into extrusion driving force through intermediate transmission part, and acts on infusion hose or auxiliary return hose, realizes flow dynamic balance through adjusting the flow area of two.

[0007] Preferably, the intermediate transmission part includes a connecting column on the valve body and a transmission slider slidingly connected to the outside of the connecting column.

[0008] Preferably, the sliding direction of the transmission slider is parallel to the radial direction of the elastic pipeline.

[0009] Preferably, the two elastic pipelines are symmetrically distributed along the central axis of the adjusting cavity, and the fixed contact lengths of the two elastic pipelines with the arc inner wall of the adjusting cavity are the same.

[0010] Preferably, the infusion hose is provided with a one-way check valve at the rear end of the intermediate transmission member, which is used to prevent the heat conducting medium from flowing backward and maintain the one-way conveying characteristics.

[0011] Preferably, the elastic pipeline is made of elastic rubber or silica gel material.

[0012] The utility model has the beneficial effects that: through the extrusion of the intermediate transmission member to the elastic pipeline, the flow area of the infusion hose and the auxiliary return hose is automatically adjusted when the system pressure changes, a closed loop flow control circuit is formed, the self-adjustment of the flow and the overload protection are realized, the flow stable control can be realized without external power supply and complex control system, the equipment cost and the maintenance difficulty are reduced, the problems of low flow control precision, complex structure, lack of overload protection and the like in the prior art are solved, and the stability and service life of system operation are improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0014] Figure 1 The utility model provides the water state diagram of pressure control steady flow valve for the utility model;

[0015] Figure 2 The utility model provides the water state diagram of pressure control steady flow valve for the utility model;

[0016] Figure 3 The utility model provides the pressure protection state diagram of pressure control steady flow valve circulating pump for the utility model.

[0017] In the drawing, 1, valve body;11, adjusting cavity;12, two-way fluid port;2, infusion hose;3, auxiliary return hose;4, intermediate transmission member;41, connecting column;42, transmission sliding block;5, one-way check valve. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described as follows by combining with specific drawings.

[0019] REFERENCE Figures 1-3As shown, the pressure-controlled constant-flow valve comprises a valve body 1 and an intermediate transmission member 4 arranged on the valve body 1, and the valve body 1 is internally provided with an adjusting cavity 11. The adjusting cavity 11 is in a semi-closed state and has an arc-shaped inner wall, and two elastic pipelines with variable diameter characteristics are arranged inside, namely, a transfusion hose 2 and an auxiliary return hose 3. Both pipelines are made of elastic rubber or silicone material, and through the elasticity and flexibility, the pipelines adapt to the expansion or shrinkage deformation caused by pressure change. The arc-shaped inner wall of the adjusting cavity 11 forms a specific contact interface with the elastic pipelines, ensuring the stability of the contact during the deformation process. The valve body 1 is also provided with a two-way fluid port 12, which is connected with the communication parts of the transfusion hose 2 and the auxiliary return hose 3, respectively, for fluid distribution and pressure transmission.

[0020] The transfusion hose 2 serves as the main conveying channel, and its input end is connected with an external conveying pipeline, being responsible for the forward transmission of fluid; the auxiliary return hose 3 serves as an auxiliary channel, being used for dynamically adjusting the flow and realizing pressure relief protection. The intermediate transmission member 4 is located between the two elastic pipelines, and its function is to convert the radial force generated by the transfusion hose 2 or the auxiliary return hose 3 due to pressure change into extrusion driving force, and reversely act on the other pipeline, so as to adjust the flow cross-sectional area of the two pipelines.

[0021] When the fluid pressure in the transfusion hose 2 rises, the pipe wall expands outward due to the pressure, and the radial expansion force is transmitted to the auxiliary return hose 3 through the intermediate transmission member 4, forming extrusion on the auxiliary return hose 3, resulting in the decrease of the flow cross-sectional area and the decrease of the flow of the auxiliary return hose 3; on the contrary, when the pressure in the transfusion hose 2 decreases, the pipe wall shrinks, the extrusion force of the intermediate transmission member 4 on the auxiliary return hose 3 decreases, and the auxiliary return hose 3 increases in cross-sectional area and flow due to the elastic recovery. Through this reverse adjustment mechanism, the flow of the two pipelines dynamically balances with the change of pressure.

[0022] In normal operation state, the flow of the bidirectional fluid port 12 is consistent with the flow of the infusion hose 2. If the external pipeline is in a closed or semi-closed state, the flow of the infusion hose 2 will be converted into the sum of the flow of the bidirectional fluid port 12 and the flow of the auxiliary return hose 3, at this time the auxiliary return hose 3 realizes pressure relief shunting by increasing its own cross-sectional area, avoiding abnormal rise of system pressure. The design realizes self-adaptive flow regulation without external control through the deformation of the elastic pipeline and the mechanical linkage of the intermediate transmission member 4, and at the same time has the characteristics of simple structure and high reliability. The pressure-controlled constant-flow valve comprises a valve body 1 and an intermediate transmission member 4 arranged on the valve body 1, an adjusting cavity 11 is arranged in the valve body 1, two elastic pipelines with variable diameter characteristics are arranged in the adjusting cavity 11, the adjusting cavity 11 is in a semi-closed state and the inner wall is arc-shaped, which is helpful to form a specific contact interface with the elastic pipeline to better adapt to the deformation of the elastic pipeline, the two elastic pipelines are respectively an infusion hose 2 and an auxiliary return hose 3, the elastic pipeline is made of elastic rubber or silicone material and the like which has good elasticity and flexibility to ensure that it can expand or shrink when subjected to pressure change, and the valve body 1 is further provided with a bidirectional fluid port 12 which is in communication with the connection of the infusion hose 2 and the auxiliary return hose 3, the intermediate transmission member 4 is arranged on the valve body 1 and located between the two elastic pipelines, the radial force generated by the expansion deformation of the elastic pipeline is converted into extrusion driving force through the intermediate transmission member 4 and acts on the infusion hose 2 or the auxiliary return hose 3, and the flow dynamic balance is realized by adjusting the flow cross-sectional area of the two;

[0023] The infusion hose 2 is the main fluid conveying channel, the input end can be connected with the external main conveying pipeline, is responsible for conveying fluid from one position to another, the auxiliary return hose 3 plays the role of auxiliary flow regulation, when the flow in the infusion hose 2 changes, the auxiliary return hose 3 can realize the dynamic balance of flow by adjusting the flow area itself, the infusion hose 2 and the auxiliary return hose 3 are connected with the two-way fluid port 12, provide necessary channels for flow regulation, for example, in the normal operating state, the flow of the infusion hose 2 is the flow of the two-way fluid port 12, but if the pipeline outside the two-way fluid port 12 is in a closed or semi-closed state, the flow of the infusion hose 2 is the sum of the flow of the return hose 12 and the flow of the return hose 3, at this time, the return hose 3 plays a pressure relief protection role, through these ports, the fluid is distributed between the two elastic pipes under the action of pressure change, so as to realize the dynamic balance of flow, when the fluid pressure in the infusion hose 2 or the auxiliary return hose 3 changes, the elastic pipe will expand or shrink accordingly, the radial force generated by the deformation will be transmitted to the intermediate transmission part 4, which will be converted into extrusion driving force and act on the infusion hose 2 and the auxiliary return hose 3, so as to adjust the flow area of the two, specifically, when the flow pressure in the infusion hose 2 increases, the infusion hose 2 will expand and deform, the radial force generated by the expansion deformation is transmitted through the intermediate transmission part 4 and converted into extrusion driving force on the auxiliary return hose 3, so that the flow area of the auxiliary return hose 3 decreases, thereby reducing the flow in the auxiliary return hose 3; on the contrary, when the fluid pressure in the infusion hose 2 decreases, the infusion hose 2 shrinks, the extrusion of the intermediate transmission part 4 on the auxiliary return hose 3 is weakened, the flow area of the auxiliary return hose 3 increases, in this way, the flow of the infusion hose 2 and the auxiliary return hose 3 is adjusted in real time, and the dynamic balance between them is realized, the advantage is that the flow can be automatically adjusted according to the change of fluid pressure, without the need of external complex control system to realize flow regulation;

[0024] Referring to Figure 2 Further, the intermediate transmission part 4 includes a connecting column 41 provided on the valve body 1 and a transmission sliding block 42 slidingly connected to the outside of the connecting column 41, the connecting column 41 is installed and fixed on the valve body 1, providing stable support and track for the transmission sliding block 42, so that the elastic pipe can smoothly drive the transmission sliding block 42 to run on the connecting column 41 when it expands and deforms.

[0025] The sliding direction of the transmission sliding block 42 is parallel to the radial direction of the elastic pipeline. When the fluid pressure in the infusion hose 2 changes, causing the radial expansion or contraction deformation of the infusion hose 2, the deformation force of the infusion hose 2 can directly act on the transmission sliding block 42 because the sliding direction of the transmission sliding block 42 is parallel to the radial direction of the elastic pipeline. Taking the example of the expansion of the infusion hose 2 due to the increase in the pressure of the infusion hose 2, the force generated by the radial expansion of the infusion hose 2 will push the transmission sliding block 42 to slide along the connecting column 41 along the same direction as the sliding direction of the transmission sliding block 42. This direct force transmission mode reduces the loss of force in the transmission process, so that the transmission sliding block 42 can quickly respond to the deformation of the elastic pipeline, improves the response speed of the flow regulation, and there is a relatively direct linear relationship between the sliding displacement of the transmission sliding block 42 and the radial deformation of the elastic pipeline. When the radial deformation of the elastic pipeline changes slightly, the transmission sliding block 42 will produce a precise sliding displacement accordingly, so as to accurately regulate the flow area of the other elastic pipeline.

[0026] Referring to Figures 1-3 Further, the two elastic pipelines are symmetrically distributed along the central axis of the adjustment cavity 11, and the fixed contact lengths of the two elastic pipelines with the arc-shaped inner wall of the adjustment cavity 11 are the same. The symmetric distribution can make the two elastic pipelines produce uniform and symmetric expansion or contraction when subjected to the same pressure, so that the force acting on the transmission sliding block 42 is uniformly distributed, which can avoid the inclination or deviation of the transmission sliding block 42 due to uneven force, ensure the smooth movement of the transmission sliding block 42, and accurately regulate the flow area of the infusion hose 2 and the auxiliary return hose 3, so as to realize stable flow control. The same fixed contact lengths of the two elastic pipelines with the arc-shaped inner wall can help to ensure that they produce the same force on the transmission sliding block 42 under the same pressure change, so that the displacement of the transmission sliding block 42 more accurately corresponds to the change of the flow.

[0027] Referring to Figure 1 Further, the infusion hose 2 is provided with a one-way check valve 5 at the rear end of the intermediate transmission member 4. The one-way check valve 5 is used to prevent the reverse flow of the heat conducting medium and maintain the one-way conveying characteristics. When the heat conducting medium flows in the normal conveying direction, the pressure of the heat conducting medium after participating in the flow regulation process through the intermediate transmission member 4 can push the one-way check valve 5 to open, so that the heat conducting medium can smoothly pass through the infusion hose 2 and continue to move forward. When an abnormal situation occurs, such as the sudden increase of the downstream pressure, the heat conducting medium has a tendency to flow in the reverse direction. The one-way check valve 5 will automatically close under the action of the reverse flow pressure to prevent the reverse flow of the heat conducting medium, so that the heat conducting medium can flow between the infusion hose 2 and the return hose 3, or between the infusion hose 2 and the bidirectional fluid port 12, and between the bidirectional fluid port 12 and the bidirectional fluid port 3, and the reverse flow of the heat conducting medium will not occur.

[0028] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A voltage controlled constant current valve, characterized by, The utility model relates to a kind of valve and its control method, including; Valve body (1), the inside of the valve body (1) is equipped with adjusting cavity (11), the inside of the adjusting cavity (11) is equipped with two elastic pipes with variable diameter characteristics, and along its axial direction respectively with the fixed contact interface of the arc inner wall of the adjusting cavity (11), two The elastic pipes are infusion hose (2) and auxiliary return hose (3) respectively, and the valve body (1) is further equipped with the two-way fluid port (12) that is communicated with the connecting place of infusion hose (2) and auxiliary return hose (3) communication; Intermediate transmission member (4), the intermediate transmission member (4) is located between two elastic pipes on valve body (1), and the radial force generated by the expansion deformation of the elastic pipe is converted into extrusion driving force by intermediate transmission member (4), and is acted on infusion hose (2) or auxiliary return hose (3), and the flow dynamic balance is realized by adjusting the flow area of two.

2. The pressure compensated flow valve of claim 1, wherein, The intermediate transmission member (4) includes a connecting column (41) provided on the valve body (1) and a transmission slider (42) slidably connected to the outside of the connecting column (41).

3. The pressure compensated flow valve of claim 2, wherein, The sliding direction of the transmission slider (42) is parallel to the radial direction of the elastic pipe.

4. The pressure compensated flow valve of claim 1, wherein, The two elastic pipes are symmetrically distributed along the central axis of the adjusting cavity (11), and the fixed contact lengths of the two elastic pipes with the arc inner wall of the adjusting cavity (11) are the same.

5. The pressure compensated flow valve of claim 1, wherein, The infusion hose (2) is provided with a one-way check valve (5) at the rear end of the intermediate transmission member (4), and the one-way check valve (5) is used to prevent the backflow of the heat conducting medium and maintain the one-way conveying characteristic.

6. The pressure compensated flow valve of claim 1, wherein, The elastic pipe is made of elastic rubber or silicone material.

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