A self-operated throttle valve

Abstract

The present invention relates to a self-operated throttle valve, comprising a valve core, a valve body and a connector. The valve core comprises a hemispherical section, a cylindrical section and a first truncated cone section. A through hole is provided on the top surface of the hemispherical section, a spiral groove is provided on the outer wall of the cylindrical section, a turbine blade is provided on the outer wall of the first truncated cone section, the large end of the first truncated cone section is closed, and a spiral vortex hole is provided on the closed end surface of the first truncated cone section. The valve body is sleeved on the outer side of the valve core, a spiral protrusion is provided on the inner wall of the valve body, and a flow hole is provided inside the valve body. The connector comprises a small cylindrical section, a second truncated cone section and a large cylindrical section. The large cylindrical section is sleeved on the outer side of the valve body cavity, and the closed end of the hemispherical section contacts the inner wall of the second truncated cone section. The self-operated throttle valve provided in the above technical solution has a simple structure and is easy to use. It can effectively solve the problems of the existing throttle valve having a complex structure, requiring external force adjustment, slow flow response and difficulty in distinguishing flow size, and the high cost of the existing precision control throttle valve.

Description

Technical Field

[0001] The invention relates to the technical field of throttle valves, in particular to a self-operated throttle valve. Background Art

[0002] The flow control valve adjusts the flow rate of the valve port by changing the flow area of ​​the valve port, thereby controlling the movement speed of the actuator. There are mainly throttle valves, speed control valves, temperature compensation speed control valves, overflow throttle valves, etc. Among them, throttle valves are only suitable for hydraulic systems with small load and temperature changes and low speed stability requirements. The working principle of the throttle valve is: the liquid flows from the oil inlet into the throttle port and then flows out from the oil outlet of the valve.

[0003] The throttle valve mainly controls the flow rate by changing the cross section, thereby controlling the movement speed of the terminal actuator. It has the following three main problems: first, the structure is relatively complex; second, the flow rate regulation and control mainly rely on external force; third, the flow path is mainly a flow path, so it is difficult to distinguish the flow rate. In industrial applications, in order to enhance the effect of regulation, flange throttle valves are generally used, which generally show basic regulation states such as external force regulation and manual intervention; in order to control more accurately and operate more refined, on the basis of the basic design, electronic control technology and electromagnetic control technology are used to establish electro-hydraulic proportional technology / servo control technology, which is ideal in control and effect, but belongs to the precision control type and is relatively expensive in industrial applications. Therefore, it is urgent to design a new technical solution to comprehensively solve the problems existing in the existing technology. Summary of the invention

[0004] The purpose of the present invention is to provide a self-operated throttle valve which has a simple structure and is easy to use. It can effectively solve the problems of the existing throttle valves, such as complex structure, requirement for external force adjustment, slow flow response, difficulty in distinguishing flow size, and high cost.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A self-operated throttle valve comprises a valve core, a valve body and connectors arranged at both ends of the valve body, the valve core comprises a hemispherical section, a cylindrical section and a first truncated cone section arranged in sequence, a communicating cavity is arranged inside the hemispherical section, the cylindrical section and the first truncated cone section, the open end of the hemispherical section is connected to one end of the cylindrical section, the other end of the cylindrical section is connected to the small end of the first truncated cone section, a through hole is arranged on the top surface of the hemispherical section, a spiral groove is arranged on the outer wall of the cylindrical section, a turbine blade is arranged on the outer wall of the first truncated cone section, the turbine blade is in a divergent thread shape from the small end to the large end of the first truncated cone section, the large end of the first truncated cone section is closed, and a spiral vortex hole distributed along its circumference is opened on the closed end surface of the first truncated cone section, and the spiral direction of the vortex hole is opposite to the spiral direction of the turbine blade;

[0007] The valve body is sleeved on the outer side of the valve core, the inner wall of the valve body is provided with a spiral protrusion matched with the spiral groove along its circumference, and the inside of the valve body is provided with a flow hole used in conjunction with the turbine blade along its axial direction;

[0008] The connecting head includes a small cylindrical section, a second conical section and a large cylindrical section which are hollow and arranged in series. The small cylindrical section is connected to the small head end of the second conical section, and the large cylindrical section is connected to the large head end of the second conical section. The large cylindrical section is sleeved on the outside of the inner cavity of the valve body, and the closed end of the hemispherical section contacts the inner wall of the second conical section.

[0009] A further solution is that the large end of the first truncated cone segment is provided with support feet, and the support feet are arranged at equal intervals along the circumference of the first truncated cone segment.

[0010] A further solution is that the spiral groove and the spiral protrusion have the same tooth shape, which is rectangular, trapezoidal or sawtooth.

[0011] A further solution is that the valve body includes an inner tube and an outer tube arranged outside the inner tube, the spiral protrusion and the flow hole are arranged on the inner wall of the inner tube, and the two ends of the outer tube respectively extend to the junction of the large cylindrical section of the two connecting heads and the second conical section.

[0012] A further solution is that the cross section of the through hole is semicircular.

[0013] A further solution is that at least two vortex holes are provided.

[0014] The self-operated throttle valve provided in the above technical scheme is provided with a valve core, a valve body and a connector, has a simple structure and is easy to install. The valve core external thread and the valve body internal thread form a mutually matching spiral pair, and a large pitch transmission thread is used to achieve a large distance axial movement under the condition of a small angle rotation; in addition, the turbine rotation is used to achieve internal rotation and external rotation, wherein the internal rotation is to use the internal vortex hole to push the valve core to rotate when a small flow fluid passes through the internal vortex hole in a flowing state, and according to the rotational characteristics between the internal and external threads, when the internal vortex hole flows, the valve core is pushed to produce a relatively far axial operation, thereby opening the valve core and increasing the flow area; the external rotation is when a large flow fluid passes through the flow hole, it acts on the turbine blades with divergent threads below, thereby pushing the valve core to rotate, that is, when a large flow fluid passes through, it pushes the turbine to rotate, generating an axial movement trend, thereby adjusting the axial large flow flow area and reducing the flow cross section. The self-operated throttle valve of the present invention has a simple structure and is easy to install and use. It can adjust the flow surface by the flow rate of the flowing liquid itself to obtain a stable flow rate at the outlet. At the same time, it can also achieve a flow diversion path effect through vortex holes and turbine blades. Finally, it can also play a bidirectional role for throttling adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the self-operated throttle valve of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the valve core of the present invention;

[0017] Figure 3 It is a structural schematic diagram of the valve body of the present invention;

[0018] Figure 4 It is a schematic structural diagram of the connector of the present invention.

[0019] In the figure: 1. valve core; 11. hemispherical section; 111. through hole; 12. cylindrical section; 121. spiral groove; 13. first truncated cone section; 131. vortex hole; 132. turbine blade; 14. support foot; 2. valve body; 21. inner tube; 211. spiral protrusion; 212. through hole; 22. outer tube; 3. connector; 31. small cylindrical section; 32. second truncated cone section; 33. large cylindrical section. DETAILED DESCRIPTION

[0020] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention.

[0021] The technical solution adopted by the present invention is as follows Figures 1 to 4As shown, a self-operated throttle valve comprises a valve core 1, a valve body 2 and connectors 3 arranged at both ends of the valve body 2. The valve core 1 comprises a hemispherical section 11, a cylindrical section 12 and a first truncated cone section 13 arranged in sequence. A communicating cavity is arranged inside the hemispherical section 11, the cylindrical section 12 and the first truncated cone section 13. The open end of the hemispherical section 11 is connected to one end of the cylindrical section 12, and the other end of the cylindrical section 12 is connected to the small end of the first truncated cone section 13. A through hole 111 is arranged on the top surface of the hemispherical section 11, a spiral groove 121 is arranged on the outer wall of the cylindrical section 12, and a turbine blade 132 is arranged on the outer wall of the first truncated cone section 13. The blades 132 are in a divergent thread shape from the small end to the large end of the first conical section 13. The large end of the first conical section 13 is closed, and three spiral vortex holes 131 distributed along its circumference are opened on the closed end surface of the first conical section 13. The spiral direction of the vortex hole 131 is opposite to the spiral direction of the turbine blade 132. By utilizing the circumferentially distributed inclined flow direction vortex holes, the valve core can be rotated and pushed when the internal flow is passed; and the spiral directions are opposite. Under the same flow direction, the two have opposite directions of rotational pushing on the valve core, thereby playing a role of tightening or loosening, so as to adjust the axial movement of the valve core. The vortex hole and the turbine blade realize internal rotation of the turbine and external rotation of the turbine respectively. The internal rotation of the turbine is when a small flow rate of fluid passes through, the vortex hole pushes the valve core to produce a relative movement in the direction of departure under the flow state, that is, the valve core is opened to increase the flow area; the external rotation of the turbine is when a large flow rate of fluid passes through the flow hole and the fluid acts on the turbine blade below, thereby pushing the valve core to rotate, and the valve core produces an axial movement trend, that is, the valve core is closed to reduce the flow area.

[0022] Combination Figure 1 and Figure 3 The valve body 2 is sleeved on the outer side of the valve core 1, and the inner wall of the valve body 2 is provided with a spiral protrusion 211 (the tooth shape in this embodiment is rectangular, and can also be adjusted to a trapezoidal or sawtooth shape) along its circumference, which is adapted to the spiral groove 121. In the present invention, the spiral groove and the spiral protrusion form a spiral pair, and the pitch of both is large, which can ensure a large distance of axial movement under a small angle rotation; the inside of the valve body 2 is provided with a flow hole 212 used in conjunction with the turbine blade 132 along its axial direction, and the cross-section of the flow hole 212 is semicircular; the valve body 2 includes an inner tube 21 and an outer tube 22 arranged on the outer side of the inner tube 21, and the spiral protrusion 211 and the flow hole 212 are both arranged on the inner wall of the inner tube 21.

[0023] Combination Figure 1 and Figure 4The connector 3 includes a small cylindrical section 31, a second truncated cone section 32 and a large cylindrical section 33 which are hollow and arranged in sequence. The small cylindrical section 31 is connected to the small end of the second truncated cone section 32, and the large cylindrical section 33 is connected to the large end of the second truncated cone section 32. The two ends of the outer tube 22 extend to the connection between the large cylindrical section 33 and the second truncated cone section 32 of the two connectors 3, respectively. The large cylindrical section 33 is sleeved on the outside of the inner cavity of the valve body 2, and the closed end of the hemispherical section 11 is in contact with the inner wall of the second truncated cone section 32. The role of the connector is to produce a sealing effect with the spherical surface of the hemispherical section of the valve core in the taper direction, and adjust the flow area of ​​the flow port when in contact with each other. The line contact formed by the conical surface and the spherical surface can play a better role in adjusting the flow cross-sectional area.

[0024] In addition, in this embodiment, a support foot 14 is provided at the large end of the first conical section 13, and three support feet 14 are arranged at equal intervals along the circumference of the first conical section 13. The support feet can form an effective space with the outlet under the action of the flow state, which can ensure the stable flow of the flow state and prevent the occurrence of poor flow caused by the contact between the valve core structure and the inner wall of the outlet.

[0025] In summary, the self-operated throttle valve of the present invention has the following characteristics:

[0026] 1. Simplified structure: The overall structure only includes the valve core, valve body and connector, which is simple in structure and easy to install;

[0027] 2. Ability to achieve self-regulation: The valve core rotates to produce lateral movement, which results in changes in the flow cross-section, which mainly depends on the size of the flow rate of the flow port, that is, the flow rate of the flow itself has a decisive effect on the position of the valve core; the flow rate through two different paths generates opposite rotation directions, and the balance of the valve core position is achieved through the pressure balance of the internal flow state, so as to adjust the flow surface to obtain a stable flow rate at the outlet;

[0028] 3. Ability to realize flow diversion control of large and small flows: For flow diversion control, when the flow is small, the fluid at the inlet is directly connected through the vortex hole in the center, and a small flow passes through the cavity of the valve core; when a large flow passes, the valve core opens and flows out through the flow hole, thus realizing the flow diversion path effect of large and small flows;

[0029] 4. It can play a bidirectional role for throttling adjustment: The present invention produces axial movement under the action of the spiral pair formed by the valve core and the valve body, thereby causing the flow cross section between the valve core and the connector to change. Therefore, it can be used in both directions and can be used Figure 1 The state shown is from right to left; the direction from left to right can also be used, the conditions and effects of the two are equivalent, but the main usage is left in and right out.

[0030] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. For ordinary technicians in this technical field, after knowing the contents recorded in the present invention, they can make several equivalent changes and substitutions without departing from the principle of the present invention. These equivalent changes and substitutions should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A self-operated throttle valve, characterized in that: It comprises a valve core, a valve body and connectors arranged at both ends of the valve body, the valve core comprises a hemispherical section, a cylindrical section and a first truncated cone section arranged in sequence, a connected cavity is arranged inside the hemispherical section, the cylindrical section and the first truncated cone section, the open end of the hemispherical section is connected to one end of the cylindrical section, the other end of the cylindrical section is connected to the small end of the first truncated cone section, the top surface of the hemispherical section is provided with a through hole, the outer wall of the cylindrical section is provided with a spiral groove, the outer wall of the first truncated cone section is provided with a turbine blade, the turbine blade is in a divergent thread shape from the small end to the large end of the first truncated cone section, the large end of the first truncated cone section is closed, and the closed end surface of the first truncated cone section is provided with spiral vortex holes distributed along its circumference, and the spiral direction of the vortex holes is opposite to the spiral direction of the turbine blade; The valve body is sleeved on the outer side of the valve core, the inner wall of the valve body is provided with a spiral protrusion matched with the spiral groove along its circumference, and the inside of the valve body is provided with a flow hole used in conjunction with the turbine blade along its axial direction; The connector includes a small cylindrical section, a second truncated cone section and a large cylindrical section which are hollow and arranged in sequence, wherein the small cylindrical section is connected to the small end of the second truncated cone section, and the large cylindrical section is connected to the large end of the second truncated cone section. The large cylindrical section is sleeved on the outside of the inner cavity of the valve body, and the closed end of the hemispherical section contacts the inner wall of the second truncated cone section. The large end of the first truncated cone section is provided with support feet, and the support feet are arranged at equal intervals along the circumference of the first truncated cone section; The valve body comprises an inner tube and an outer tube arranged outside the inner tube, the spiral protrusion and the flow hole are arranged on the inner wall of the inner tube, and the two ends of the outer tube extend to the junction of the large cylindrical section of the two connectors and the second truncated cone section respectively.

2. The self-operated throttle valve according to claim 1, characterized in that: The spiral groove and the spiral protrusion have the same tooth shape, which is rectangular, trapezoidal or sawtooth.

3. The self-operated throttle valve according to claim 1, characterized in that: The cross section of the through hole is semicircular.

4. The self-operated throttle valve according to claim 1, characterized in that: At least two vortex holes are provided.

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