Tesla valve and working method

Abstract

The invention discloses a Tesla valve and a working method, and belongs to the technical field of intelligent power supply of coal mine equipment. The Tesla valve comprises a valve shell, connectors are symmetrically arranged at the two ends of the valve shell, a valve element is arranged in the valve shell, the valve shell and the valve element are in interference fit, the contact face of the valve shell and the valve element is of a continuous curved surface structure with the closed circumference, and at least one Tesla valve unit string is machined on the outer surface of the valve element in the axis direction. Each Tesla valve unit string is formed by connecting at least two Tesla valve units end to end; the Tesla valve unit comprises a main circulating groove and a branch circulating groove; the branch circulation grooves are symmetrically arranged relative to the main circulation groove, the branch circulation grooves and the main circulation groove have two intersections, and the branch radian of one end is larger than that of the other end; the device is simple in overall structure and small in size, is used for providing a power source for an underground power supply device, provides a working condition of a low-voltage power source, and also reduces the risk of liquid leakage.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent power supply for coal mine equipment, and more specifically, relates to a Tesla valve and a working method thereof. Background Art

[0002] The Tesla valve is a kind of pressure reducing valve, which has not been applied in coal mine underground yet. A pressure reducing valve is a pressure control valve that regulates the liquid pressure at its outlet to be lower than the liquid pressure at its inlet. Currently, the pressure reducing valves used in hydraulic systems are mainly fixed-pressure pressure reducing valves, and there are mainly two structural forms of fixed-pressure pressure reducing valves. One is a direct-acting fixed-pressure pressure reducing valve, such as Figure 1 shown, and the other is a pilot-operated fixed-pressure pressure reducing valve, such as Figure 2 shown.

[0003] The working principle of the main valve of the pilot-operated fixed-pressure pressure reducing valve is the same as that of the direct-acting fixed-pressure pressure reducing valve. That is, high-pressure liquid with a pressure of P1 flows in from the inlet port, is decompressed through the throttle port, and the pressure drops to a lower pressure of P2, which is output from the outlet port.

[0004] Although the above-mentioned pressure reducing valves have been widely used in hydraulic systems, due to their relatively complex structure and large volume, they do not meet the usage requirements in some specific places, such as mines, coal mine underground, etc.

[0005] In the prior art, the Tesla pipes or Tesla grooves of specific Tesla valves are all arranged on a plane, and this arrangement method cannot avoid liquid leakage. Summary of the Invention

[0006] To solve the deficiencies existing in the prior art, the present invention provides a Tesla valve, which utilizes the power source of the emulsion liquid system of a hydraulic support to provide a power source that meets the pressure required by the power generation system to meet the mine working conditions.

[0007] The present invention adopts the following technical solutions:

[0008] The first aspect of the present invention discloses a Tesla valve, comprising: a connector, a valve core, a valve housing, and a series of Tesla valve units; connectors are symmetrically arranged at both ends of the valve housing, the valve core is arranged inside the valve housing, an interference fit is adopted between the valve housing and the valve core, the contact surface between the valve housing and the valve core adopts a continuous curved surface structure form that is circumferentially closed, liquid storage grooves are opened at both ends of the valve core, and not less than one series of Tesla valve units are machined on the outer surface of the valve core along the axial direction; each series of Tesla valve units is composed of not less than two Tesla valve units connected in series; each Tesla valve unit includes: a first Tesla valve unit, a second Tesla valve unit, and a third Tesla valve unit; the first Tesla valve unit, the second Tesla valve unit, and the third Tesla valve unit all include: a main flow channel and a branch flow channel; the branch flow channels are symmetrically arranged with respect to the main flow channel, there are two intersections between the branch flow channels and the main flow channel, and the branch radian at one end is greater than that at the other end.

[0009] According to the described Tesla valve, the first Tesla valve unit further includes: a liquid inlet groove; a liquid inlet groove is opened at the end with a smaller branch radian.

[0010] According to the described Tesla valve, the third Tesla valve unit further includes: a liquid outlet groove; a liquid outlet groove is opened at the end with a larger branch radian.

[0011] According to the described Tesla valve, the end with a larger branch radian of the first Tesla valve unit is directly or connected to the end with a smaller branch radian of the second Tesla valve unit through a communication groove; the end with a larger branch radian of the second Tesla valve unit is directly or connected to the end with a smaller branch radian of the third Tesla valve unit through a communication groove.

[0012] According to the described Tesla valve, the series of Tesla valve units includes: a first series of Tesla valve units and a second series of Tesla valve units; the first series of Tesla valve units and the second series of Tesla valve units are arranged at intervals along the axial direction on the outer wall of the valve core and are arranged in parallel; the number of second Tesla valve units in the first series of Tesla valve units is one more than that in the second series of Tesla valve units, and the Tesla valve units in the first series of Tesla valve units and the second series of Tesla valve units are arranged in a staggered manner.

[0013] According to the described Tesla valve, gaskets are provided at the joints between both ends of the valve housing and the connectors, a liquid inlet is opened at one end connector, a liquid outlet is opened at the other connector, the liquid inlet is connected to the liquid inlet groove through the liquid storage groove and the drainage groove, and the liquid outlet is connected to the liquid outlet groove through the liquid storage groove and the drainage groove.

[0014] According to the described Tesla valve, the Tesla valve unit is completely symmetric with respect to the main flow channel.

[0015] According to the described Tesla valve, the series of Tesla valve units are completely the same and are opened on the outer wall of the valve core at equal intervals.

[0016] According to the described Tesla valve, the Tesla valve unit strings opened on the outer wall of the valve core are arranged in series, and the adjacent two Tesla valve unit strings are in opposite directions and are connected through a connection groove.

[0017] The second aspect of the present invention discloses a working method of a Tesla valve. Based on the described Tesla valve, it includes the following steps:

[0018] Connect the high-pressure emulsion through a pipeline to the liquid inlet.

[0019] The high-pressure emulsion enters the liquid inlet tank through the drainage groove in the joint and the liquid storage tank.

[0020] The high-pressure emulsion in the liquid inlet tank flows along the parallel or series-connected Tesla valve unit strings to the liquid outlet tank, and the pressure of the high-pressure emulsion gradually decreases during the flow process.

[0021] The emulsified liquid after the pressure reduction flows from the liquid outlet tank into the liquid storage tank and the drainage groove of the joint.

[0022] The low-pressure emulsified liquid in the drainage groove flows out from the liquid outlet.

[0023] Compared with the prior art, the beneficial effects of the present invention at least include:

[0024] (1). The overall structure of the Tesla valve provided by the present invention is simple and the volume is small. It is used to provide a power source for the underground power supply device, and at the same time, it can also be extended to other industries to apply high-pressure hydraulic sources and provide low-pressure power source working conditions.

[0025] (2). The joint of the present application is in interference fit with the valve housing, and several Tesla valve unit strings are opened on the outer wall of the cylindrical valve core, greatly reducing the risk of liquid leakage.

[0026] (3). The present application can obtain different required pressures and flow rates by adjusting the connection mode and quantity of the Tesla unit strings. Description of the Drawings

[0027] Figure 1 Schematic diagram of a direct-acting constant-pressure reducing valve;

[0028] Figure 2 Schematic diagram of a pilot-operated constant-pressure reducing valve;

[0029] Figure 3 Schematic diagram of the Tesla valve unit of the present application;

[0030] Figure 4 Schematic diagram of the structural composition of a Tesla valve of the present application;

[0031] Figure 5Schematic diagram of the three-dimensional structure of the first parallel connection mode of the Tesla unit in this application;

[0032] Figure 6 Schematic diagram of the cylindrical surface expansion of the second parallel connection mode of the Tesla unit in this application;

[0033] Figure 7 Schematic diagram of the cylindrical surface expansion of the series connection mode of the Tesla unit in this application Figure 3 。

[0034] In the figure: 1. Liquid inlet; 2. Connector; 3. Gasket; 4. Valve core; 41. Liquid storage tank; 5. Valve housing; 6. Tesla valve unit; 61. First Tesla valve unit; 611. Main flow channel; 612. Branch flow channel; 613. Liquid inlet channel; 614. Connection channel; 62. Second Tesla valve unit; 63. Third Tesla valve unit; 631. Liquid outlet channel; 632. Communication channel; 7. First series of Tesla valve units; 8. Second series of Tesla valve units; 9. Liquid outlet. Specific implementation mode

[0035] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the attached drawings in the embodiments of the present invention. The embodiments described in this application are only a part of the embodiments of the present invention, rather than all embodiments. Based on the spirit of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "front", "rear", "inner", "outer", "right", "left", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] First embodiment:

[0039] As Figure 3-7 shown, the present invention provides a Tesla valve, comprising: a joint 2, a valve core 4, a valve housing 5, and a Tesla valve unit string.

[0040] The joints 2 are symmetrically arranged at both ends of the valve housing 5, the valve core 4 is arranged inside the valve housing 5, and at least one Tesla valve unit string is axially formed on the outer surface of the valve core 4.

[0041] As Figure 5 shown, in this embodiment, the Tesla valve unit string includes: a first Tesla valve unit string 7 and a second Tesla valve unit string 8. The first Tesla valve unit string 7 and the second Tesla valve unit string 8 are axially spaced apart and arranged in parallel on the outer wall of the valve core 4; each Tesla valve unit string is formed by connecting in series at least two Tesla valve units 6.

[0042] The Tesla valve unit 6 includes: a first Tesla valve unit 61, a second Tesla valve unit 62, and a third Tesla valve unit 63.

[0043] The first Tesla valve unit 61, the second Tesla valve unit 62, and the third Tesla valve unit 63 each include: a main flow channel 611 and a branch flow channel 612; the branch flow channels 612 are symmetrically arranged with respect to the main flow channel 611, and there are two intersections between the branch flow channels 612 and the main flow channel 611, and the branch radian at one end is greater than that at the other end.

[0044] The first Tesla valve unit 61 further includes: a liquid inlet groove 613; the liquid inlet groove 613 is formed at the end with a smaller branch radian.

[0045] The third Tesla valve unit 63 further includes: a liquid outlet groove 631; the liquid outlet groove 631 is formed at the end with a larger branch radian.

[0046] As Figure 5 shown, the end with a larger branch radian of the first Tesla valve unit 61 is directly connected to the end with a smaller branch radian of the second Tesla valve unit 62; the end with a larger branch radian of the second Tesla valve unit 62 is directly connected to the end with a smaller branch radian of the third Tesla valve unit 63.

[0047] The first Tesla valve unit string 7 has one more second Tesla valve unit 62 than the second Tesla valve unit string 8, and the Tesla valve units 6 of the first Tesla valve unit string and the second Tesla valve unit string 8 are arranged in a staggered manner. By using this arrangement method, the arrangement density of the Tesla valve units is increased.

[0048] As Figure 6As shown, in another embodiment, when the requirement for the layout density of the Tesla valve units is not high, the Tesla valve unit strings can be selected to be exactly the same and equally spaced on the outer wall of the valve core 4, thereby saving processing costs.

[0049] As Figure 7 shown, in another embodiment, the Tesla valve unit strings provided on the outer wall of the valve core 4 are arranged in series, and the adjacent two Tesla valve unit strings are in opposite directions and connected through the connecting groove 614. When the pressure of the high-pressure emulsified liquid flowing in from the liquid inlet groove 613 is too high, this arrangement can be adopted to increase the flow path of the high-pressure emulsified liquid, so that the pressure of the emulsified liquid flowing out from the liquid outlet groove 631 meets the predetermined value.

[0050] As Figure 6 shown in FIG. 6 or 7, one end of the first Tesla valve unit 61 with a large branch arc is connected to one end of the second Tesla valve unit 62 with a small branch arc through the communication groove 632; one end of the second Tesla valve unit 62 with a large branch arc is connected to one end of the third Tesla valve unit 63 with a small branch arc through the communication groove 632.

[0051] Liquid storage grooves 41 are provided at both ends of the valve core 4. The liquid storage grooves 41 and the drainage grooves of the joint 2 work together to enable the emulsified liquid to pass through the liquid inlet groove 613 and the liquid outlet groove 631 normally.

[0052] Gaskets 3 are provided at the joints of both ends of the valve housing 5 and the joint 2. An inlet port 1 is provided at one end of the joint 2, and an outlet port 9 is provided at the other joint. The inlet port 1 is connected to the liquid inlet groove 613 through the liquid storage groove 41 and the drainage groove, and the outlet port 9 is connected to the liquid outlet groove 631 through the liquid storage groove 41 and the drainage groove.

[0053] As Figure 3 shown, the Tesla valve units are completely symmetrical about the main flow groove 611.

[0054] The high-pressure emulsified liquid in the coal mine is connected to the inlet port 1 of the Tesla valve. An interference fit is adopted between the valve housing 5 and the valve core 4. Therefore, no liquid will flow through the contact part between the valve housing 5 and the valve core 4. The liquid can only flow through the valve core 4 along the Tesla valve unit string and then flow out through the outlet port 9. During the flow process of the liquid, due to the special flow channel structure of the Tesla valve, certain resistance losses are generated, so that the high-pressure emulsified liquid flowing out meets the pressure required by the power generation system. By adjusting the structure of the Tesla unit, as well as the connection method and quantity of the Tesla unit strings, different required pressures and flows can be obtained.

[0055] The contact surface between the valve housing 5 and the valve core 4 of the Tesla valve adopts a circumferentially closed continuous curved surface structure form.

[0056] Second Embodiment:

[0057] This embodiment provides a working method for a Tesla valve, including the following steps:

[0058] S1. Connect the high-pressure emulsion through a pipeline to the liquid inlet 1;

[0059] S2. The high-pressure emulsion enters the liquid inlet tank 613 through the drainage groove in the joint 2 and the liquid storage tank 41;

[0060] S3. The high-pressure emulsion in the liquid inlet tank 613 flows along the parallel or series-connected Tesla valve units to the liquid outlet tank 631, and the pressure of the high-pressure emulsion gradually decreases during the flow;

[0061] S4. The emulsified liquid with reduced pressure flows from the liquid outlet tank 631 into the liquid storage tank 41 and the drainage groove of the joint 2;

[0062] S5. The emulsified liquid in the drainage groove flows out from the liquid outlet 9.

[0063] Compared with the prior art, the beneficial effects of the present invention at least include:

[0064] (1). The overall structure of the Tesla valve provided by the present invention is simple and small in volume, which is used to provide a power source for the underground power supply device, and can also be extended to other industries to apply high-pressure hydraulic sources and provide low-pressure power source working conditions.

[0065] (2). The joint of this application is in interference fit with the valve housing, and several Tesla valve unit strings are provided on the outer wall of the cylindrical valve core, which greatly reduces the risk of liquid leakage;

[0066] (3). This application can obtain different required pressures and flows by adjusting the connection mode and quantity of the Tesla unit strings.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: still can modify the specific implementation manners of the present invention or make equivalent replacements, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A Tesla valve, comprising: Adapter (2), valve core (4), valve housing (5) and a Tesla valve unit string; characterized in that: The joints (2) are symmetrically arranged at both ends of the valve housing (5), the valve core (4) is arranged inside the valve housing (5), an interference fit is adopted between the valve housing (5) and the valve core (4), the contact surface between the valve housing (5) and the valve core (4) adopts a continuous curved surface structure form that is circumferentially closed, liquid storage grooves (41) are opened at both ends of the valve core (4), and not less than one Tesla valve unit string is machined on the outer surface of the valve core (4) along the axial direction; each of the Tesla valve unit strings is composed of not less than two Tesla valve units (6) connected in series; The Tesla valve unit (6) includes: a first Tesla valve unit (61), a second Tesla valve unit (62) and a third Tesla valve unit (63); The first Tesla valve unit (61), the second Tesla valve unit (62) and the third Tesla valve unit (63) each include: a main flow channel (611) and a branch flow channel (612); the branch flow channels (612) are symmetrically arranged with respect to the main flow channel (611), there are two intersections between the branch flow channels (612) and the main flow channel (611), and the branch radian at one end is greater than the branch radian at the other end.

2. A Tesla valve according to claim 1, characterized in that: The first Tesla valve unit (61) further includes: a liquid inlet groove (613); the liquid inlet groove (613) is opened at the end with a smaller branch radian.

3. A Tesla valve according to claim 1, characterized in that: The third Tesla valve unit (63) further includes: a liquid outlet groove (631); the liquid outlet groove (631) is opened at the end with a larger branch radian.

4. A Tesla valve according to claim 1, characterized in that: The end with a larger branch radian of the first Tesla valve unit (61) is directly or connected to the end with a smaller branch radian of the second Tesla valve unit (62) through a communication groove (632); The end with a larger branch radian of the second Tesla valve unit (62) is directly or connected to the end with a smaller branch radian of the third Tesla valve unit (63) through a communication groove (632).

5. A Tesla valve according to claim 1, characterized in that: The Tesla valve unit string includes: a first Tesla valve unit string (7) and a second Tesla valve unit string (8); the first Tesla valve unit string (7) and the second Tesla valve unit string (8) are arranged at intervals along the axial direction on the outer wall of the valve core (4) and are arranged in parallel; The first Tesla valve unit string (7) has one more second Tesla valve unit (62) than the second Tesla valve unit string (8), and the Tesla valve units (6) of the first Tesla valve unit string (7) and the second Tesla valve unit string (8) are arranged in a staggered manner.

6. A Tesla valve according to claim 1, characterized in that: Gaskets (3) are provided at the joints between both ends of the valve housing (5) and the connectors (2). An inlet port (1) is provided on one of the connectors (2), and an outlet port (9) is provided on the other connector (2). The inlet port (1) is connected to the liquid inlet groove (613) through the liquid storage tank (41) and the drainage groove. The outlet port (9) is connected to the liquid outlet groove (631) through the liquid storage tank (41) and the drainage groove.

7. A Tesla valve according to claim 1, characterized in that: The Tesla valve unit is completely symmetric about the main flow groove (611).

8. A Tesla valve according to claim 4, characterized in that: The Tesla valve unit strings are identically and equally spaced on the outer wall of the valve core (4).

9. A Tesla valve according to claim 4, characterized in that: The Tesla valve unit strings provided on the outer wall of the valve core (4) are arranged in series. Two adjacent Tesla valve unit strings are in opposite directions and are connected through the connection groove (614).

10. A working method of a Tesla valve, characterized in that: A Tesla valve according to any one of claims 1-9, comprising the following steps: Connect the high-pressure emulsion to the inlet port (1) through a pipeline; The high-pressure emulsion enters the liquid inlet groove (613) through the drainage groove in the connector (2) and the liquid storage tank (41); The high-pressure emulsion in the liquid inlet groove (613) flows along the parallel or series-connected Tesla valve unit strings to the liquid outlet groove (631), and the pressure of the high-pressure emulsion gradually decreases during the flow; The emulsified liquid with reduced pressure flows from the liquid outlet groove (631) into the liquid storage tank (41) and the drainage groove of the connector (2); The low-pressure emulsified liquid in the drainage groove flows out from the outlet port (9).

Images