A servo proportional valve with compensation and adjustment function

Abstract

The servo proportional valve has a compensation and adjustment function, and the valve body and the compensation cylinder have a side wall on one side of the valve body connected to a liquid inlet pipe, and the side wall on the other side of the valve body is connected to a liquid outlet pipe. The compensation cylinder is embedded in one side of the interior of the valve body, and the liquid inlet pipe extends into the valve body and is connected with the bottom end of the side wall of the compensation cylinder. A sealing disk is provided for sliding inside the compensation cylinder, and the radial side wall of the sealing disk slides and fits with the inner radial side wall of the compensation cylinder. The liquid outlet pipe extends into the valve body and is connected with a plurality of liquid guide tubes, and one end of the plurality of liquid guide tubes away from the liquid outlet pipe is connected with the side wall of the compensation cylinder. An internal thread is provided at the top end of the interior of the compensation cylinder, and a threaded sleeve is rotatably inserted through the internal thread. A T-type push rod is slidably inserted into the interior of the threaded sleeve, and the bottom end of the T-type push rod passes through the bottom end of the threaded sleeve and is fixedly connected to the upper end face of the sealing disk. The beneficial effects achieved by the present invention are: a large flow adjustment range and a compensation and adjustment function are provided, thereby ensuring that the servo proportional valve meets the use requirements.

Description

Technical Field

[0001] The invention relates to the technical field of servo proportional valves, and in particular to a servo proportional valve with a compensation and adjustment function. Background Art

[0002] The servo proportional valve is the product of the combination of proportional technology and servo technology. The servo proportional flow valve generally includes two parts: a flow control valve and a pressure compensator. The application number is CN202110343785.2. A hydraulic servo proportional valve is used. In the process of adjusting the output flow by rotating the first valve core driven by a driving motor, the hydraulic servo proportional valve is not affected by the pressure change of the second working port, so as to obtain higher flow regulation accuracy and stability. However, the existing servo proportional valve has a small flow regulation range and does not have the function of compensation regulation, which results in the servo proportional valve being unable to meet the use requirements. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a servo proportional valve with a compensation adjustment function so as to solve the problem raised in the background technology.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a servo proportional valve with compensation and adjustment function, which includes a valve body and a compensation cylinder, one side wall of the valve body is connected to a liquid inlet pipe, and the other side wall of the valve body is connected to a liquid outlet pipe.

[0005] The compensation cylinder is embedded in one side of the inner part of the valve body, the liquid inlet pipe extends into the valve body and is connected with the bottom end of the side wall of the compensation cylinder, a sealing disk is slidably provided inside the compensation cylinder, and the radial side wall of the sealing disk slides and fits with the inner radial side wall of the compensation cylinder, the liquid outlet pipe extends into the valve body and is connected with a plurality of liquid guide tubes, and one end of the plurality of liquid guide tubes away from the liquid outlet pipe is connected with the side wall of the compensation cylinder, and the flowing medium is introduced into the interior of the compensation cylinder through the liquid inlet pipe, which can lift the sealing disk upward along the interior of the compensation cylinder, and when the sealing disk exceeds the height of the lowest side, the flowing medium can enter the lowest liquid guide tube and then be discharged through the liquid outlet pipe.

[0006] The internal top end of the compensation cylinder is provided with an internal thread, and a threaded sleeve is rotated and inserted through the internal thread, and a T-shaped push rod is slidably inserted inside the threaded sleeve. The bottom end of the T-shaped push rod passes through the bottom end of the threaded sleeve and is fixedly connected to the upper end surface of the sealing disk. The threaded sleeve can adjust its position along the axial direction of the compensation cylinder, and the T-shaped push rod can adjust its height synchronously with the threaded sleeve. The sealing disk adjusts its position synchronously with the T-shaped push rod, and passes over the liquid guide tubes of corresponding heights in turn. In this way, the number of liquid guide tubes required for the flow of the flowing medium can be adjusted according to the flow requirements of the flowing medium.

[0007] As a preferred technical solution of the present invention, the sealing disk is axially provided with a liquid guide groove extending to the inside of the T-shaped push rod, and the outer wall of the T-shaped push rod is provided with a plurality of butt joint tubes distributed along the radial direction of the T-shaped push rod, and the end of the butt joint tube is slidably fitted with the inner wall of the compensation tube, and the flow medium with a certain pressure can enter the liquid guide groove after entering the compensation tube, and since the end of the butt joint tube is slidably fitted with the inner wall of the compensation tube, the flow medium will not be discharged, and when the butt joint tube is directly opposite to the liquid guide tube of the corresponding height, the flow medium can be introduced into the liquid guide tube.

[0008] As a preferred technical solution of the present invention, the inner diameter of the butt joint tube is the same as the inner diameter of the catheter.

[0009] As a preferred technical solution of the present invention, a gate-type bracket is fixedly provided on the side wall of the valve body, and a buffer tube located directly above the compensation tube is fixedly provided on the side wall of the gate-type bracket, the threaded sleeve slides and extends into the interior of the buffer tube, and the top outer wall of the T-type push rod slides and fits with the inner radial side wall of the buffer tube, and a limit plate located above the T-type push rod is fixedly provided on the inner wall of the buffer tube, and a spring is provided between the limit plate and the T-type push rod, and the elastic potential energy of the spring is utilized to make the T-type push rod have a tendency to push downward in real time, thereby preventing the T-type push rod from moving up and down arbitrarily inside the threaded sleeve and affecting the position of the sealing plate.

[0010] As a preferred technical solution of the present invention, a pressure gauge is fixedly provided on the top of the buffer tube, and an air vent is opened on the limit plate. By adjusting the gap between the T-shaped push rod and the limit plate, the spring is compressed to generate rebound potential energy, that is, the pressure required to lift the sealing plate, which can be adjusted according to the flow range adjustment range.

[0011] As a preferred technical solution of the present invention, the outer wall of the threaded sleeve is rotatably sleeved with an elliptical support steel ring through an external thread. By rotating the elliptical support steel ring, the vertical height of the elliptical support steel ring can be adjusted until the upper and lower ends of the elliptical support steel ring respectively abut against the bottom end surface of the buffer tube and the upper end surface of the valve body, thereby preventing the threaded sleeve from rotating at will.

[0012] As a preferred technical solution of the present invention, an operating notch is provided on the side wall of the elliptical supporting steel ring, and an arc-shaped toggle plate is fixedly provided on the outer side of the operating notch.

[0013] The present invention has the following advantages:

[0014] The present invention is a servo proportional valve with a compensation and adjustment function. The compensation cylinder is used as a place for flow compensation. The flow output can be adjusted according to the flow pressure requirement. The flow adjustment range is large and the compensation and adjustment function is provided to ensure that the servo proportional valve meets the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of a preferred embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of an elliptical support steel ring according to a preferred embodiment of the present invention;

[0017] Figure 3 It is a cross-sectional view of the structure of a liquid inlet pipe, a compensation cylinder, a plurality of liquid guide pipes and a liquid outlet pipe in a preferred embodiment of the present invention;

[0018] Figure 4 It is a partial structural cross-sectional view of a preferred embodiment of the present invention.

[0019] Explanation of the reference numerals in the accompanying drawings: 1. valve body; 2. liquid outlet pipe; 3. elliptical supporting steel ring; 4. threaded sleeve; 5. pressure gauge; 6. buffer tube; 7. door-type bracket; 8. liquid inlet pipe; 9. arc-shaped toggle plate; 10. compensation cylinder; 11. liquid guide tube; 12. limit plate; 13. spring; 14. T-type push rod; 15. butt joint tube; 16. sealing plate. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Please refer to Figure 1-4The present invention discloses a servo proportional valve with compensation and adjustment function, which includes a valve body 1 and a compensation cylinder 10. A liquid inlet pipe 8 is connected to a side wall of the valve body 1, and the liquid inlet pipe 8 is connected to an external pipeline. A liquid outlet pipe 2 is connected to the other side wall of the valve body 1, and the liquid outlet pipe 2 is connected to an external conduit. The valve body 1 is used as a component for controlling the output flow of the medium. The output volume can be controlled according to the output volume demand. It has a high flow regulation accuracy function and meets the use requirements.

[0024] The compensation cylinder 10 is embedded in one side of the interior of the valve body 1, the liquid inlet pipe 8 extends into the valve body 1 and is connected to the bottom end of the side wall of the compensation cylinder 10, a sealing disk 16 is slidably provided inside the compensation cylinder 10, the liquid outlet pipe 2 extends into the valve body 1 and is connected to a plurality of liquid guide tubes 11, and the ends of the plurality of liquid guide tubes 11 away from the liquid outlet pipe 2 are connected to the side wall of the compensation cylinder 10, and the flowing medium is introduced into the interior of the compensation cylinder 10 through the liquid inlet pipe 8, which can lift the sealing disk 16 upward along the interior of the compensation cylinder 10, and when the sealing disk 16 exceeds the height of the lowest side, the flowing medium can enter the lowest liquid guide tube 11 and then be discharged through the liquid outlet pipe 2.

[0025] By sliding the radial side wall of the sealing disk 16 against the inner radial side wall of the compensation sleeve 10 , the sealing performance of the sealing disk 16 is ensured and the flowing medium is prevented from crossing the gap between the sealing disk 16 and the compensation sleeve 10 and entering the space of the compensation sleeve 10 above the sealing disk 16 .

[0026] An internal thread is provided at the top end of the inner part of the compensation cylinder 10, and a threaded sleeve 4 is rotated and inserted through the internal thread. A T-type push rod 14 is slidably inserted inside the threaded sleeve 4. The bottom end of the T-type push rod 14 passes through the bottom end of the threaded sleeve 4 and is fixedly connected to the upper end surface of the sealing disk 16. By rotating the threaded sleeve 4, the threaded sleeve 4 can adjust its position along the axial direction of the compensation cylinder 10, and the T-type push rod 14 can adjust its height synchronously with the threaded sleeve 4. The sealing disk 16 adjusts its position synchronously with the T-type push rod 14, and passes over the liquid guide tubes 11 of corresponding heights in turn. In this way, the number of liquid guide tubes 11 required for the flow of the flow medium can be adjusted according to the flow requirements of the flow medium. The flow output can be adjusted according to the flow pressure requirements. The flow adjustment range is large and it has the function of compensation adjustment to ensure that the servo proportional valve meets the use requirements.

[0027] The sealing disk 16 is axially provided with a liquid guide groove extending to the inside of the T-shaped push rod 14. The outer wall of the T-shaped push rod 14 is provided with a plurality of butt joints 15 distributed along the radial direction of the T-shaped push rod 14. The end of the butt joint 15 is slidably fitted with the inner wall of the compensation cylinder 10. After the flow medium with a certain pressure enters the compensation cylinder 10, it can enter the liquid guide groove. Since the end of the butt joint 15 is slidably fitted with the inner wall of the compensation cylinder 10, the flow medium will not be discharged.

[0028] As the flowing medium is continuously input into the compensation cylinder 10, the sealing disk 16 can be lifted up along the inside of the compensation cylinder 10. When the docking tube 15 is directly opposite to the liquid guide tube 11 of the corresponding height, the flowing medium can be introduced into the liquid guide tube 11. As the sealing disk 16 continues to be adjusted upward, more docking tubes 15 can be directly opposite to the corresponding liquid guide tubes 11, thereby realizing the conduction of the flow path and achieving the purpose of large-scale flow regulation to meet the use requirements.

[0029] The inner diameter of the butt joint 15 is made the same as the inner diameter of the liquid guiding tube 11. Once the butt joint 15 and the liquid guiding tube 11 are aligned, the flow path can be ensured to be connected, thereby achieving effective conveyance of the flowing medium.

[0030] A gate-type bracket 7 is fixedly provided on the side wall of the valve body 1, and a buffer tube 6 located directly above the compensation tube 10 is fixedly provided on the side wall of the gate-type bracket 7, the threaded sleeve 4 slides and extends into the buffer tube 6, and the top outer wall of the T-type push rod 14 slides and fits with the inner radial side wall of the buffer tube 6, and a limit plate 12 located above the T-type push rod 14 is fixedly provided on the inner wall of the buffer tube 6, and a spring 13 is provided between the limit plate 12 and the T-type push rod 14, and the elastic potential energy of the spring 13 is utilized to make the T-type push rod 14 have a tendency to push downward in real time, so as to prevent the T-type push rod 14 from moving up and down arbitrarily inside the threaded sleeve 4 and affecting the position of the sealing plate 16.

[0031] By manually rotating the threaded sleeve 4, the position can be adjusted in the axial direction along the compensation tube 10, that is, the height of the T-type push rod 14 can be adjusted. A pressure gauge 5 is fixedly provided at the top end of the buffer tube 6, and a ventilation hole is opened in the limit plate 12. Since the top outer wall of the T-type push rod 14 slides and fits with the inner radial side wall of the buffer tube 6, when the T-type push rod 14 is adjusted up and down in height inside the buffer tube 6, the space between the T-type push rod 14 and the limit plate 12 can be compressed. The compressed air pressure signal can be guided to the air inlet of the pressure gauge 5 through the ventilation hole of the limit plate 12. The pressure gauge 5 can obtain the pressure signal value, and a pressure gauge with a numerical digital display can also be used.

[0032] By adjusting the gap between the T-shaped push rod 14 and the limit plate 12, the spring 13 is compressed to generate rebound potential energy, that is, the pressure required to lift the sealing plate 16, which can be adjusted according to the flow range.

[0033] An elliptical supporting steel ring 3 is rotatably sleeved on the outer wall of the threaded sleeve 4 through an external thread. By rotating the elliptical supporting steel ring 3, the vertical height of the elliptical supporting steel ring 3 can be adjusted until the upper and lower ends of the elliptical supporting steel ring 3 respectively abut against the bottom end surface of the buffer tube 6 and the upper end surface of the valve body 1, thereby preventing the threaded sleeve 4 from rotating at will.

[0034] An operating notch is provided on the side wall of the elliptical supporting steel ring 3, and an arc-shaped toggle plate 9 is fixedly provided outside the operating notch. The arc-shaped toggle plate 9 is provided to assist in rotating the elliptical supporting steel ring 3, saving time and effort.

[0035] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0036] Other parts of the present invention not described in detail belong to the prior art and will not be described in detail here.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A servo proportional valve with compensation and adjustment function, characterized in that: It comprises a valve body (1) and a compensation cylinder (10), wherein one side wall of the valve body (1) is connected to a liquid inlet pipe (8), and the other side wall of the valve body (1) is connected to a liquid outlet pipe (2); The compensation cylinder (10) is embedded in one side of the interior of the valve body (1); the liquid inlet pipe (8) extends into the valve body (1) and is communicated with the bottom end of the side wall of the compensation cylinder (10); a sealing disk (16) is slidably provided inside the compensation cylinder (10); the radial side wall of the sealing disk (16) is slidably fitted with the radial side wall of the interior of the compensation cylinder (10); the liquid outlet pipe (2) extends into the valve body (1) and is connected to a plurality of liquid guide tubes (11); the ends of the plurality of liquid guide tubes (11) away from the liquid outlet pipe (2) are communicated with the side wall of the compensation cylinder (10); The internal top end of the compensation cylinder (10) is provided with an internal thread, and a threaded sleeve (4) is rotatably inserted through the internal thread, and a T-shaped push rod (14) is slidably inserted inside the threaded sleeve (4), and the bottom end of the T-shaped push rod (14) passes through the bottom end of the threaded sleeve (4) and is fixedly connected to the upper end surface of the sealing disk (16); The side wall of the valve body (1) is fixedly provided with a gate-type bracket (7), and the side wall of the gate-type bracket (7) is fixedly provided with a buffer tube (6) located directly above the compensation tube (10); the threaded sleeve (4) slides and extends into the interior of the buffer tube (6), and the top outer wall of the T-type push rod (14) slides and fits with the inner radial side wall of the buffer tube (6); the inner wall of the buffer tube (6) is fixedly provided with a limit plate (12) located above the T-type push rod (14), and a spring (13) is provided between the limit plate (12) and the T-type push rod (14); by rotating the threaded sleeve (4), the position can be adjusted in the axial direction along the compensation tube (10), that is, the height of the T-type push rod (14) can be adjusted.

2. A servo proportional valve with compensation and adjustment function as claimed in claim 1, characterized in that: The sealing disk (16) is axially provided with a liquid guide groove extending to the interior of the T-shaped push rod (14); the outer wall of the T-shaped push rod (14) is provided with a plurality of butt joint pipes (15) distributed along the radial direction of the T-shaped push rod (14); the end of the butt joint pipe (15) is slidably fitted with the inner wall of the compensation cylinder (10).

3. A servo proportional valve with compensation and adjustment function as claimed in claim 2, characterized in that: The inner diameter of the butt joint tube (15) is the same as the inner diameter of the catheter tube (11).

4. A servo proportional valve with compensation and adjustment function as claimed in claim 1, characterized in that: A pressure gauge (5) is fixedly provided at the top end of the buffer tube (6), and a vent hole is provided on the limit plate (12).

5. A servo proportional valve with compensation and adjustment function as claimed in claim 1, characterized in that: The outer wall of the threaded sleeve (4) is rotatably sleeved with an elliptical supporting steel ring (3) via an external thread.

6. A servo proportional valve with compensation and adjustment function as claimed in claim 5, characterized in that: An operating notch is provided on the side wall of the elliptical supporting steel ring (3), and an arc-shaped toggle plate (9) is fixedly provided outside the operating notch.

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