Intelligent electromagnetic hydraulic valve

Abstract

The invention discloses an intelligent electromagnetic hydraulic valve which is characterized by comprising a valve body, a valve sleeve, a valve rod, a valve cover, a laser displacement sensor and an oil pressure sensor. A first oil port and a second oil port are formed in the side wall of the valve body; the valve sleeve is arranged in the valve body, and a first valve port and a second valve port are formed in the positions, corresponding to the first oil port and the second oil port, of the valve sleeve. The valve rod is arranged in the valve sleeve; a sealing piece is arranged in the middle of the valve rod; the sealing piece moves along with the valve rod and is hermetically connected with the valve sleeve; the valve cover is arranged at the end part of the valve body; the laser displacement sensor is connected with the valve cover, a through hole allowing laser to penetrate through is formed in the surface of the valve cover, and the laser penetrates through the through hole to be emitted to the end of the valve rod to detect the displacement change of the valve rod; an instantaneous oil way and a high-pressure oil way are formed in the side wall of the valve body and connected with oil pressure sensors respectively. The action characteristics and the oil pressure value of the hydraulic valve rod are directly monitored through the laser displacement sensor and the oil pressure sensor, and errors and delay are reduced.

Description

Technical Field

[0001] This invention relates to the field of hydraulic valve technology, and more specifically to an intelligent electromagnetic hydraulic valve. Background Technology

[0002] Hydraulic valves in the hydraulic operating mechanisms of existing high-voltage circuit breakers are typically installed on the circuit breaker body or a dedicated testing device. Their operating characteristics (such as valve core stroke) and hydraulic system oil pressure must be obtained indirectly through auxiliary switches. This indirect testing method introduces a certain delay, leading to large errors in the test results and making it difficult to accurately reflect the actual operation of the valve core.

[0003] Therefore, developing an intelligent electromagnetic hydraulic valve that can directly monitor the valve core's movement characteristics and reduce testing errors and delays is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides an intelligent electromagnetic hydraulic valve that can directly monitor the valve core's action characteristics, reducing test errors and delays.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An intelligent electromagnetic hydraulic valve, comprising: The valve body has a first oil port and a second oil port on its side wall; A valve sleeve is disposed inside the valve body, and a first valve port and a second valve port are provided at positions corresponding to the first oil port and the second oil port. A valve stem is placed inside the valve sleeve; a sealing element is provided in the middle of the valve stem; the sealing element moves with the valve stem and is sealed to the valve sleeve. A valve cover, wherein the valve cover is disposed at the end of the valve body; A laser displacement sensor is connected to the valve cover, and the valve cover has a through hole on its surface for the laser to pass through. The laser passes through the through hole and is emitted to the end of the valve stem to detect the displacement change of the valve stem. The valve body has an instantaneous oil circuit and a high-pressure oil circuit on its side wall. The instantaneous oil circuit and the high-pressure oil circuit are respectively connected to the oil pressure sensor, which measures the oil pressure inside the valve body.

[0006] The beneficial effect of adopting the above technical solution is that by directly detecting the valve stem displacement and oil pressure through laser displacement sensor and oil pressure sensor respectively, real-time, non-contact monitoring of hydraulic valve action characteristics and internal oil pressure is realized, avoiding the delay and error caused by traditional indirect detection methods, and significantly improving test accuracy and response speed.

[0007] Preferably, the valve sleeve includes: a first valve sleeve and a second valve sleeve, wherein the first valve port is formed on the surface of the first valve sleeve and the second valve port is formed on the surface of the second valve sleeve; and the sealing element is disposed between the first valve sleeve and the second valve sleeve.

[0008] Preferably, the valve cover is connected to a bent plate, and the laser displacement sensor is connected to the bent plate.

[0009] Preferably, a first push rod is connected to one end of the valve stem near the valve cover. The first push rod moves with the valve stem, and the laser displacement sensor detects the displacement change of the first push rod.

[0010] Preferably, two oil pressure sensors are provided, one for testing the oil pressure in the constant high-pressure oil circuit and the other for testing the instantaneous oil circuit. Configuring two oil pressure sensors to monitor the constant high-pressure oil circuit and the instantaneous oil circuit separately enables independent monitoring of different pressure states, which helps to accurately determine the dynamic response characteristics of the hydraulic valve under different operating conditions.

[0011] Preferably, a pressure testing connector is provided at the connection between the oil pressure sensor and the oil circuit. The pressure testing connector includes a connector body, a spring, and a steel ball. The connector body has an internal mounting cavity, and the spring is disposed within the mounting cavity. The connector body has an inlet and an outlet at both ends, respectively. The steel ball is disposed within the mounting cavity, and the spring abuts against the steel ball, sealing the outlet. The pressure testing connector adopts a spring-steel ball self-sealing structure, automatically sealing the oil circuit when the oil pressure sensor is not connected, preventing oil leakage, and achieving quick disassembly and sealing protection.

[0012] Preferably, a spring support is provided on the outside of the spring, the spring support is placed in the mounting cavity, and the spring support is connected to the liquid inlet. A throttling orifice is opened at the end of the spring support near the steel ball. The throttling orifice effectively reduces oil pressure shock, protects the oil pressure sensor from damage by instantaneous high pressure, extends the service life of the sensor, and keeps the oil circuit unobstructed, ensuring measurement accuracy.

[0013] Preferably, a second push rod is provided at the end of the oil pressure sensor connected to the connector body. When the oil pressure sensor is connected to the connector body, the second push rod passes through the liquid outlet and pushes the steel ball into the mounting cavity, thus opening the liquid outlet. The oil pressure sensor actively pushes the steel ball open through the second push rod to achieve oil circuit continuity, realizing a quick connection mechanism of plug-in connection and unplug-out sealing, greatly improving on-site testing efficiency.

[0014] Preferably, the surface of the seal is provided with turbulence grooves and weight reduction grooves.

[0015] Preferably, the valve body is connected to a primary valve for switching the oil circuit state.

[0016] As can be seen from the above technical solution, compared with the prior art, the present invention discloses an intelligent electromagnetic hydraulic valve, which has the following advantages: (1) Directly monitor the action characteristics of the hydraulic valve. Monitor the hydraulic valve action oil pressure to reduce errors and delays. After the oil pressure sensor is removed after the test is completed, the connector body can automatically return to the closed state, which is convenient to use. (2) By reducing the weight and designing turbulence channels, the valve stem can improve its movement flexibility and centering. (3) The connector body reduces the oil pressure flow area through the throttling orifice, thereby reducing the impact on the oil pressure sensor; (4) The laser displacement sensor adopts a non-contact structure, which reduces damage to the hydraulic valve. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 A schematic diagram of the internal structure of the hydraulic valve provided by the present invention; Figure 2 This is a schematic diagram of the internal structure of the connection between the pressure measuring connector and the oil pressure sensor provided by the present invention.

[0019] In the figure, 1-Valve body; 11-First oil port; 12-Second oil port; 13-Instantaneous oil circuit; 14-High-pressure oil circuit; 2-Valve sleeve; 21-First valve port; 22-Second valve port; 23-First valve sleeve; 24-Second valve sleeve; 3-Valve stem; 31-Seal; 32-Turbulence channel; 33-Weight reduction channel; 4-Valve cover; 41 - Through hole; 5-Laser displacement sensor; 6-Oil pressure sensor; 61 - Second push rod; 7-Bend plate; 8-First push rod; 9-Pressure test connector; 91-Connector body; 92-Spring; 93-Steel ball; 94-Spring support; 95-Throttle orifice; 10 - Primary valve. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention discloses an intelligent electromagnetic hydraulic valve, comprising: Valve body 1, with a first oil port 11 and a second oil port 12 provided on the side wall of valve body 1; Valve sleeve 2 is disposed inside valve body 1. Valve sleeve 2 has a first valve port 21 and a second valve port 22 at positions corresponding to the first oil port 11 and the second oil port 12. Valve stem 3 is placed inside valve sleeve 2; a sealing element 31 is provided in the middle of valve stem 3; the sealing element 31 moves with valve stem 3 and is sealed to valve sleeve 2. Valve cover 4 is located at the end of valve body 1; Laser displacement sensor 5 is connected to valve cover 4, and valve cover 4 has a through hole 41 for laser to pass through. The laser passes through the through hole 41 and is emitted to the end of valve stem 3 to detect the displacement change of valve stem 3. The valve body 1 has an instantaneous oil passage 13 and a high-pressure oil passage 14 on its side wall. The instantaneous oil passage 13 and the high-pressure oil passage 14 are respectively connected to the oil pressure sensor 6, which measures the oil pressure inside the valve body 1. The laser displacement sensor 5 and the oil pressure sensor 6 can directly monitor the movement of the valve stem 3 and the oil pressure value, directly monitoring the operating characteristics and operating oil pressure of the hydraulic valve, thus reducing errors and delays and improving the accuracy of the test.

[0022] To further optimize the above technical solution, the valve sleeve 2 includes: a first valve sleeve 23 and a second valve sleeve 24, a first valve port 21 is opened on the surface of the first valve sleeve 23, and a second valve port 22 is opened on the surface of the second valve sleeve 24; the sealing element 31 is placed between the first valve sleeve 23 and the first valve sleeve 24.

[0023] To further optimize the above technical solution, the valve cover 4 is connected to the bent plate 7, and the laser displacement sensor 5 is connected to the bent plate 7. Figure 1 In the middle, A refers to the laser beam emitted by the laser displacement sensor 5.

[0024] To further optimize the above technical solution, a first push rod 8 is connected to one end of the valve stem 3 near the valve cover 4. The first push rod 8 moves with the valve stem 3, and the laser displacement sensor 5 detects the displacement change of the first push rod 8.

[0025] To further optimize the above technical solution, two oil pressure sensors 6 are provided, one for testing the oil pressure in the constant high-pressure oil circuit 14 and the other for testing the oil pressure in the instantaneous oil circuit 13. The two oil pressure sensors 6 are connected to the valve body 1 through different oil circuits and monitor different oil pressures.

[0026] To further optimize the above technical solution, a pressure testing connector 9 is provided at the connection between the oil pressure sensor 6 and the oil circuit. The pressure testing connector 9 includes a connector body 91, a spring 92, and a steel ball 93. The connector body 91 has an internal mounting cavity, and the spring 92 is housed within the mounting cavity. The connector body 91 has an inlet and an outlet at its two ends, respectively. The steel ball 93 is housed within the mounting cavity, and the spring 92 abuts against the steel ball 93, sealing the outlet. The connector body 91 facilitates installation with the oil pressure sensor 6, and when oil pressure monitoring is not required, the connector body 91 automatically seals itself after the oil pressure sensor 6 is removed.

[0027] To further optimize the above technical solution, a spring support 94 is provided on the outside of the spring 92. The spring support 94 is placed inside the mounting cavity and is connected to the liquid inlet. A throttling orifice 95 is provided at the end of the spring support 94 near the steel ball 93. The spring support 94 is broken in the middle, divided into two parts, which are respectively located at both ends of the spring 92. The break in the middle of the spring support 94 facilitates the extension and retraction of the spring 92. The throttling orifice 95 can reduce the flow area of ​​the oil pressure and reduce the impact on the oil pressure sensor 6.

[0028] To further optimize the above technical solution, a second push rod 61 is provided at the end of the oil pressure sensor 6 connected to the connector body 9. When the oil pressure sensor 6 is connected to the connector body 9, the second push rod 61 passes through the liquid outlet and pushes the steel ball 93 into the mounting cavity, thus opening the liquid outlet. When the oil pressure sensor 6 is connected to the connector body 9, the second push rod 61 will directly push open the steel ball 93, and oil will enter the oil pressure sensor 6 from the throttling orifice 95.

[0029] To further optimize the above technical solution, the surface of the seal 31 is provided with a turbulence groove 32 and a weight reduction groove 33. The turbulence groove 32 and the weight reduction groove 33 make the valve stem 3 move more flexibly within the valve body 1 and achieve better centering.

[0030] To further optimize the above technical solution, the valve body 1 is connected to a primary valve 10 for switching the oil circuit state. The primary valve 10 has the same structure as the primary valves of other existing products, and the opening of the valve port is controlled by an electromagnet. The specific oil circuit switching process within the electromagnetic hydraulic valve has been disclosed in the applicant's previous patent applications, see the invention patent with patent number 201811558042.1 entitled "A Hydraulic Operating Mechanism and Its Hydraulic Control Valve".

[0031] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent electromagnetic hydraulic valve, characterized by, The utility model relates to a valve, comprising: a valve body having a first oil port and a second oil port formed in a side wall thereof; a valve sleeve disposed in the valve body, the valve sleeve having a first valve port and a second valve port formed in positions corresponding to the first oil port and the second oil port; a valve rod disposed in the valve sleeve, the valve rod having a sealing member formed in a middle portion thereof, the sealing member being in sealing connection with the valve sleeve while moving with the valve rod; a valve cover disposed at an end of the valve body; a laser displacement sensor connected to the valve cover, the valve cover having a through hole formed in a surface thereof for allowing laser to pass through, the laser passing through the through hole and being emitted to an end of the valve rod, and the laser displacement sensor detecting displacement change of the valve rod; an oil pressure sensor, the valve body having a transient oil passage and a high-pressure oil passage formed in the side wall thereof, the transient oil passage and the high-pressure oil passage being respectively connected to the oil pressure sensor, and the oil pressure sensor measuring oil pressure in the valve body.

2. The intelligent electromagnetic hydraulic valve according to claim 1, characterized in that, The valve sleeve comprises a first valve sleeve and a second valve sleeve, the first valve port being formed in a surface of the first valve sleeve, and the second valve port being formed in a surface of the second valve sleeve; the sealing member being disposed between the first valve sleeve and the second valve sleeve.

3. The intelligent electromagnetic hydraulic valve according to claim 1, wherein, The valve cover is connected to a bent plate, and the laser displacement sensor is connected to the bent plate.

4. The intelligent electromagnetic hydraulic valve according to claim 3, characterized in that, An end of the valve rod close to the valve cover is connected to a first ejector rod, the first ejector rod moving with the valve rod, and the laser displacement sensor detecting displacement change of the first ejector rod.

5. The intelligent electromagnetic hydraulic valve according to claim 1, wherein, The oil pressure sensor is provided with two oil pressure sensors respectively for testing oil pressure of the high-pressure oil passage and the transient oil passage.

6. The intelligent electromagnetic hydraulic valve according to claim 1, wherein, The oil pressure sensor is provided with a pressure measuring connector at a connection position of the oil pressure sensor and the oil passage, the pressure measuring connector comprising a connector body, a spring and a steel ball; the connector body being provided with an installation cavity in an interior thereof, the spring being disposed in the installation cavity; the connector body being provided with a liquid inlet and a liquid outlet at two ends thereof respectively, the steel ball being disposed in the installation cavity, and the spring abutting against the steel ball to block the liquid outlet.

7. The intelligent electromagnetic hydraulic valve according to claim 6, wherein, The spring is provided with a spring holder outside thereof, the spring holder being disposed in the installation cavity and being in communication with the liquid inlet, and an orifice being formed in an end of the spring holder close to the steel ball.

8. The intelligent electromagnetic hydraulic valve according to claim 7, characterized in that, An end of the oil pressure sensor connected to the connector body is provided with a second ejector rod, the second ejector rod passing through the liquid outlet to push the steel ball to the interior of the installation cavity when the oil pressure sensor is connected to the connector body, and the liquid outlet being opened.

9. The intelligent electromagnetic hydraulic valve according to claim 1, wherein, A surface of the sealing member is provided with a turbulent groove and a weight-reducing groove.

10. The intelligent electromagnetic hydraulic valve according to claim 1, wherein, The valve body is connected to a primary valve for switching oil passage state.

Images