A portable electro-hydraulic servo valve testing device

Abstract

This invention provides a portable electro-hydraulic servo valve testing device, relating to the field of electro-hydraulic servo valve testing. The device includes a housing, an aviation connector, and a current generator. The current generator is housed inside the housing, while the aviation connector, electrically connected to the current generator and located outside the housing, is matched with the wiring socket of the electro-hydraulic servo valve. The aviation connector includes an A-coil valve opening connector for controlling coil A to open the valve, a B-coil valve opening connector for controlling coil B to open the valve, an A-coil valve closing connector for controlling coil A to close the valve, and a B-coil valve closing connector for controlling coil B to close the valve. Any one of these connectors connects to the wiring socket to detect the opening or closing of the corresponding valve coil. This testing device is small in size, easy to carry and use in the field, and the testing process is simple and easy to implement.

Description

Technical Field

[0001] This invention relates to the field of electro-hydraulic servo valve testing, and more specifically, to a convenient electro-hydraulic servo valve testing device. Background Technology

[0002] In industrial production, electro-hydraulic servo valves are widely used in the control of turbine speed regulation systems. The equipment used in turbine control includes valve position control cards, electro-hydraulic servo valves, and displacement sensors. When valve control malfunctions during turbine operation, it is difficult to immediately determine whether a faulty electro-hydraulic servo valve is the cause. It is necessary to disconnect the original control circuit wiring and use a dedicated electro-hydraulic servo valve testing device for testing and diagnosis.

[0003] Existing electro-hydraulic servo valve testing devices require, firstly, the electro-hydraulic servo valve to be removed and installed on the testing device before it can be determined whether the valve is faulty. Secondly, they are large in size, have a sophisticated structure, and are expensive, making them difficult to portable for use at the repair site.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] The present invention includes, for example, providing a convenient electro-hydraulic servo valve testing device, which can connect to the electro-hydraulic servo valve under test using an aviation plug, drive the electro-hydraulic servo valve with continuous or intermittent simulated positive and negative current signals using a current generator, and determine whether the electro-hydraulic servo valve is faulty based on the valve's operation.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, the present invention provides a portable electro-hydraulic servo valve testing device for testing electro-hydraulic servo valves. The electro-hydraulic servo valve is equipped with an A coil, a B coil, and a wiring socket. The wiring socket is connected to the A coil and the B coil to control the opening and closing states of the valves of the A coil and the B coil. The device includes a housing, an aviation plug, and a current generator. The current generator is disposed inside the housing. The aviation plug is electrically connected to the current generator and is located outside the housing. The aviation plug is matched with the wiring socket. The aviation plug includes an A coil valve opening plug for controlling the A coil to open the valve, a B coil valve opening plug for controlling the B coil to open the valve, an A coil valve closing plug for controlling the A coil to close the valve, and a B coil valve closing plug for controlling the B coil to close the valve. Any one of the A coil valve opening plug, the B coil valve opening plug, the A coil valve closing plug, and the B coil valve closing plug is connected to the wiring socket to realize the detection of the opening or closing of the corresponding coil valve.

[0008] In an optional embodiment, the wiring socket includes four female wiring ports, namely a first female wiring port, a second female wiring port, a third female wiring port, and a fourth female wiring port. The first female wiring port is connected to the positive terminal of the A coil, the second female wiring port is connected to the negative terminal of the A coil, the third female wiring port is connected to the positive terminal of the B coil, and the second female wiring port is connected to the negative terminal of the B coil.

[0009] The A coil valve opening plug, the B coil valve opening plug, the A coil valve closing plug, and the B coil valve closing plug are each provided with four terminals corresponding to the four female wiring ports, namely the first terminal, the second terminal, the third terminal, and the fourth terminal.

[0010] Wherein, the first terminal of the A coil valve opening plug is connected to the positive terminal of the current generator, and the second terminal of the A coil valve opening plug is connected to the negative terminal of the current generator;

[0011] The first terminal of the A coil valve plug is connected to the negative terminal of the current generator, and the second terminal of the A coil valve plug is connected to the positive terminal of the current generator.

[0012] The third terminal of the B coil valve opening plug is connected to the positive terminal of the current generator, and the fourth terminal of the B coil valve opening plug is connected to the negative terminal of the current generator.

[0013] The third terminal of the B coil valve plug is connected to the negative terminal of the current generator, and the fourth terminal of the B coil valve plug is connected to the positive terminal of the current generator.

[0014] In an optional implementation, the current generator includes a valve-opening current generator and a valve-closing current generator.

[0015] The valve opening plug of coil A and the valve opening plug of coil B are connected to the valve opening current generator, and the valve closing plug of coil A and the valve closing plug of coil B are connected to the valve closing current generator.

[0016] In an optional embodiment, the housing is further provided with a valve button for opening and closing the valve opening current generator and the valve closing current generator.

[0017] In an optional embodiment, the valve button includes an A-coil valve open button, a B-coil valve open button, an A-coil valve close button, and a B-coil valve close button. The A-coil valve open button is installed on the wiring between the positive terminal of the valve open current generator and the A-coil valve open connector. The B-coil valve open button is installed on the wiring between the positive terminal of the valve open current generator and the B-coil valve open connector. The A-coil valve close button is installed on the wiring between the negative terminal of the valve close current generator and the A-coil valve close connector. The B-coil valve close button is installed on the wiring between the negative terminal of the valve open current generator and the B-coil valve close connector.

[0018] In an optional embodiment, the current generator is provided with an adjustment knob for adjusting the current signal generated by the current generator.

[0019] In an optional implementation, the current generator produces a current signal of 0-20mA.

[0020] In an optional embodiment, the current generator is further provided with a display screen that displays the magnitude of the current signal.

[0021] The beneficial effects of this invention include, for example, that the portable electro-hydraulic servo valve testing device provided in this embodiment can be designed using simple electrical equipment and circuits; due to the simple design of the equipment and electrical circuits, the portable electro-hydraulic servo valve testing device is small in size and does not have the high transportation requirements of precision instruments, thus facilitating on-site use. Furthermore, during testing, there is no need to disconnect the original control circuit wiring; simply unplug the original aviation plug and insert it into the aviation plug of the portable electro-hydraulic servo valve to perform the test. The electro-hydraulic servo valve is driven by continuous or intermittent simulated positive and negative current signals from a current generator, and the valve's operation can be used to determine whether the electro-hydraulic servo valve is faulty. The entire testing process is simple to operate and easy to implement. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the portable electro-hydraulic servo valve testing device provided in this embodiment;

[0024] Figure 2 This is a circuit connection diagram of the electro-hydraulic servo valve provided in this embodiment;

[0025] Figure 3 A schematic diagram of the structure of the aviation plug for the portable electro-hydraulic servo valve testing device provided in this embodiment;

[0026] Figure 4 This is a circuit connection diagram of the valve opening current generator for the portable electro-hydraulic servo valve detection device provided in this embodiment;

[0027] Figure 5 This is a circuit connection diagram of the valve closing current generator for the portable electro-hydraulic servo valve detection device provided in this embodiment.

[0028] Icons: 100 - Portable electro-hydraulic servo valve testing device; 110 - Housing; 120 - Aviation connector; 121 - A coil valve open connector; 122 - B coil valve open connector; 123 - A coil valve close connector; 124 - B coil valve close connector; 125 - First terminal; 126 - Second terminal; 127 - Third terminal; 128 - Fourth terminal; 130 - Current generator; 131 - Valve open current generator; 132 - Valve close current generator Generator; 133-Adjustment knob; 134-Display screen; 140-Valve button; 141-A coil valve open button; 142-B coil valve open button; 143-A coil valve close button; 144-B coil valve close button; 200-Electro-hydraulic servo valve; 210-A coil; 220-B coil; 230-Wiring socket; 231-First female wiring port; 232-Second female wiring port; 233-Third female wiring port; 234-Fourth female wiring port. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0033] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0034] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0035] Example

[0036] Please refer to Figure 1 This embodiment provides a portable electro-hydraulic servo valve testing device 100, which is used to test the electro-hydraulic servo valve 200.

[0037] Please see Figure 2 The electro-hydraulic servo valve 200 is equipped with an A coil 210, a B coil 220, and a wiring socket 230. The wiring socket 230 is connected to the A coil 210 and the B coil 220 to control the opening and closing state of the valves controlled by the A coil 210 and the B coil 220. The wiring socket 230 includes four female wiring ports, namely a first female wiring port 231, a second female wiring port 232, a third female wiring port 233, and a fourth female wiring port 234. The first female wiring port 231 is connected to the positive terminal of the A coil 210, the second female wiring port 232 is connected to the negative terminal of the A coil 210, the third female wiring port 233 is connected to the positive terminal of the B coil 220, and the second female wiring port 232 is connected to the negative terminal of the B coil 220.

[0038] The portable electro-hydraulic servo valve detection device 100 provided in this embodiment can be directly connected to the wiring socket 230, and then drive the electro-hydraulic servo valve 200 by simulating positive and negative current signals, and determine whether the electro-hydraulic servo valve 200 is faulty based on the valve's action.

[0039] Specifically, the portable electro-hydraulic servo valve testing device 100 includes a housing 110, an aviation plug 120, and a current generator 130. The current generator 130 is located inside the housing 110. The aviation plug 120 is electrically connected to the current generator 130 and is located outside the housing 110. The aviation plug 120 is matched with the wiring socket 230. In this embodiment, by adjusting the electrical connection between the aviation plug and the current generator 130, the detection of the opening and closing state of coil A 210 or coil B 220 can be realized when the aviation plug 120 is inserted into the wiring socket 230.

[0040] In this embodiment, the aviation connector 120 includes an A-coil valve open connector 121, a B-coil valve open connector 122, an A-coil valve close connector 123, and a B-coil valve close connector 124. The A-coil valve open connector 121 is used to control the A-coil 210 to open the valve, the B-coil valve open connector 122 is used to control the B-coil 220 to open the valve, the A-coil valve close connector 123 is used to control the A-coil 210 to close the valve, and the B-coil valve close connector 124 is used to control the B-coil 220 to close the valve. Any one of the A-coil valve open connector 121, the B-coil valve open connector 122, the A-coil valve close connector 123, and the B-coil valve close connector 124 is connected to the wiring socket 230 to realize the detection of the opening or closing of the corresponding coil valve.

[0041] Please refer to the following: Figure 2 and Figure 3 Since the wiring socket 230 of the electro-hydraulic servo valve 200 has four female wiring ports, in this embodiment, the A coil valve opening plug 121, B coil valve opening plug 122, A coil valve closing plug 123, and B coil valve closing plug 124 are each provided with four terminals, which correspond one-to-one with the four female wiring ports. The four terminals are respectively the first terminal 125, the second terminal 126, the third terminal 127, and the fourth terminal 128. Specifically, the first terminal 125 is inserted into the first female wiring port 231, the second terminal 126 is inserted into the second female wiring port 232, the third terminal 127 is inserted into the third female wiring port 233, and the fourth terminal 128 is inserted into the fourth female wiring port 234.

[0042] Please see Figure 4 and Figure 5 In this embodiment, the first terminal 125 of the A coil valve opening plug 121 is connected to the positive terminal of the current generator 130, the second terminal 126 of the A coil valve opening plug 121 is connected to the negative terminal of the current generator 130, and the third terminal 127 and the fourth terminal 128 of the A coil valve opening plug 121 are not connected in the circuit.

[0043] The first terminal 125 of the A coil valve plug 123 is connected to the negative terminal of the current generator 130, and the second terminal 126 of the A coil valve plug 123 is connected to the positive terminal of the current generator 130; the third terminal 127 and the fourth terminal 128 of the A coil valve plug 123 are not connected in the circuit.

[0044] The third terminal 127 of the B coil valve opening plug 122 is connected to the positive terminal of the current generator 130, and the fourth terminal 128 of the B coil valve opening plug 122 is connected to the negative terminal of the current generator 130; the first terminal 125 and the second terminal 126 of the B coil valve closing plug 124 are not connected in the circuit.

[0045] The third terminal 127 of the B coil valve plug 124 is connected to the negative terminal of the current generator 130, and the fourth terminal 128 of the B coil valve plug 124 is connected to the positive terminal of the current generator 130; the first terminal 125 and the second terminal 126 of the B coil valve plug 124 are not connected in the circuit.

[0046] In this embodiment, by connecting specific terminals of coil valve open plug 121, coil valve open plug 122, coil valve close plug 123, and coil valve close plug 124 to the positive and negative terminals of the current generator 130, a pneumatic-electric circuit is formed. This allows the detection of the opening or closing of the corresponding coil valve to be achieved when any one of the coil valve open plug 121, coil valve open plug 122, coil valve close plug 123, and coil valve close plug 124 is inserted into the wiring socket 230.

[0047] To more easily and clearly determine the detection status, in this embodiment, the current generator 130 includes a valve-open current generator 131 and a valve-closed current generator 132. When it is necessary to detect the valve's open state, the valve-open current generator 131 is used for control; when it is necessary to detect the valve's closed state, the valve-closed current generator 132 is used for control. Specifically, in this embodiment, the valve-open plug 121 of coil A and the valve-open plug 122 of coil B are connected to the valve-open current generator 131, and the valve-closed plug 123 of coil A and the valve-closed plug 124 of coil B are connected to the valve-closed current generator 132.

[0048] In addition, the housing 110 is also equipped with valve buttons 140 for opening and closing the valve current generator 131 and the valve current generator 132. The valve buttons 140 include an A-coil valve open button 141, a B-coil valve open button 142, an A-coil valve close button 143, and a B-coil valve close button 144. The A-coil valve open button 141 is installed on the wiring between the positive terminal of the valve current generator 131 and the A-coil valve open plug 121. The B-coil valve open button 142 is installed on the wiring between the positive terminal of the valve current generator 131 and the B-coil valve open plug 122. The A-coil valve close button 143 is installed on the wiring between the negative terminal of the valve current generator 132 and the A-coil valve close plug 123. The B-coil valve close button 144 is installed on the wiring between the negative terminal of the valve current generator 131 and the B-coil valve close plug 124. By pressing the above-mentioned A coil valve open button 141, B coil valve open button 142, A coil valve close button 143 and B coil valve close button 144, the circuit between the analog current signal and the electro-hydraulic servo valve 200 can be connected. The higher the frequency of pressing the button, the faster the valve opening and closing speed is adjusted, and vice versa.

[0049] In this embodiment, the current generator 130 is equipped with an adjustment knob 133 for adjusting the current signal generated by the current generator 130. The current signal generated by the current generator 130 is 0-20mA. The adjustment knob 133 can adjust the current signal generated by the current generator 130 within the range of 0-20mA. The larger the current, the faster the valve opening and closing speed, and vice versa. The current generator 130 is also equipped with a display screen 134 for displaying the magnitude of the current signal. The display screen 134 can display the current magnitude at this time, so that the operator can more clearly and directly understand the current magnitude, and thus judge the valve opening and closing speed.

[0050] The working principle of the portable electro-hydraulic servo valve testing device 100 is as follows: In this embodiment, the electro-hydraulic servo valve 200 under test is connected using an aviation plug 120. At this time, the current generator 130 continuously or intermittently simulates positive and negative current signals to drive the electro-hydraulic servo valve 200. Since this embodiment is designed with four plugs, namely A coil valve open plug 121, B coil valve open plug 122, A coil valve close plug 123, and B coil valve close plug 124, these four plugs are connected sequentially to the wiring socket 230 of the electro-hydraulic servo valve 200. This allows for the detection of the open and closed states of the A coil 210 and B coil 220 of the electro-hydraulic servo valve 200. During detection, the current of the current generator 130 and the frequency at which the current generator 130 connects to the wiring socket 230 are adjusted to observe whether the valve opening and closing speed of the electro-hydraulic servo valve 200 corresponds to the operator's operation. If they correspond, it indicates that the electro-hydraulic servo valve 200 is not malfunctioning; if they do not correspond, it indicates that the electro-hydraulic servo valve 200 has malfunctioned.

[0051] In summary, the portable electro-hydraulic servo valve testing device 100 provided in this embodiment can be designed using simple electrical equipment and circuits to create a portable electro-hydraulic servo valve 200 testing device. Due to the simple design of the equipment and electrical circuits, the portable electro-hydraulic servo valve 200 testing device is small in size and does not require the high transport conditions of precision instruments, making it convenient for on-site use. Furthermore, during testing, there is no need to disconnect the original control circuit wiring; simply unplug the original aviation connector 120 and insert it into the aviation connector 120 of the portable electro-hydraulic servo valve 200 to perform the test. The current generator 130 continuously or intermittently simulates positive and negative current signals to drive the electro-hydraulic servo valve 200, and the valve's operation can be used to determine whether the electro-hydraulic servo valve 200 is faulty. The entire testing process is simple to operate and easy to implement.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A portable electro-hydraulic servo valve testing device, used for testing an electro-hydraulic servo valve, wherein the electro-hydraulic servo valve is equipped with an A coil, a B coil, and a wiring socket, the wiring socket being connected to the A coil and the B coil to control the opening and closing state of the valve via the A coil and the B coil, characterized in that, It includes a housing, an aviation plug, and a current generator. The current generator is disposed inside the housing. The aviation plug is electrically connected to the current generator and is located outside the housing. The aviation plug is matched with the wiring socket. The aviation plug includes an A coil valve opening plug for controlling the opening of valve A, a B coil valve opening plug for controlling the opening of valve B, an A coil valve closing plug for controlling the closing of valve A, and a B coil valve closing plug for controlling the closing of valve B. Any one of the A coil valve opening plug, the B coil valve opening plug, the A coil valve closing plug, and the B coil valve closing plug is connected to the wiring socket to realize the detection of the opening or closing of the corresponding coil valve. The wiring socket includes four female terminals: a first female terminal, a second female terminal, a third female terminal, and a fourth female terminal. The first female terminal is connected to the positive terminal of coil A, the second female terminal is connected to the negative terminal of coil A, the third female terminal is connected to the positive terminal of coil B, and the fourth female terminal is connected to the negative terminal of coil B. The A coil valve opening plug, the B coil valve opening plug, the A coil valve closing plug, and the B coil valve closing plug are each equipped with four terminals corresponding to the four female wiring ports, namely the first terminal, the second terminal, the third terminal, and the fourth terminal. Wherein, the first terminal of the A coil valve opening plug is connected to the positive terminal of the current generator, the second terminal of the A coil valve opening plug is connected to the negative terminal of the current generator, and the third and fourth terminals of the A coil valve opening plug are not connected in the circuit. The first terminal of the A coil valve plug is connected to the negative terminal of the current generator, the second terminal of the A coil valve plug is connected to the positive terminal of the current generator, and the third and fourth terminals of the A coil valve plug are not connected in the circuit. The third terminal of the B coil valve opening plug is connected to the positive terminal of the current generator, the fourth terminal of the B coil valve opening plug is connected to the negative terminal of the current generator, and the first and second terminals of the B coil valve opening plug are not connected in the circuit. The third terminal of the B coil valve plug is connected to the negative terminal of the current generator, and the fourth terminal of the B coil valve plug is connected to the positive terminal of the current generator. The first and second terminals of the B coil valve plug are not connected in the circuit.

2. The portable electro-hydraulic servo valve testing device according to claim 1, characterized in that, The current generator includes a valve opening current generator and a valve closing current generator; The valve opening plug of coil A and the valve opening plug of coil B are connected to the valve opening current generator, and the valve closing plug of coil A and the valve closing plug of coil B are connected to the valve closing current generator.

3. The portable electro-hydraulic servo valve testing device according to claim 2, characterized in that, The housing is also equipped with valve buttons for opening and closing the valve current generator and the valve current generator.

4. The portable electro-hydraulic servo valve testing device according to claim 3, characterized in that, The valve buttons include an A-coil valve open button, a B-coil valve open button, an A-coil valve close button, and a B-coil valve close button. The A-coil valve open button is installed on the wiring between the positive terminal of the valve open current generator and the A-coil valve open connector. The B-coil valve open button is installed on the wiring between the positive terminal of the valve open current generator and the B-coil valve open connector. The A-coil valve close button is installed on the wiring between the negative terminal of the valve close current generator and the A-coil valve close connector. The B-coil valve close button is installed on the wiring between the negative terminal of the valve open current generator and the B-coil valve close connector.

5. The portable electro-hydraulic servo valve testing device according to claim 1 or 2, characterized in that, The current generator is equipped with an adjustment knob for adjusting the current signal generated by the current generator.

6. The portable electro-hydraulic servo valve testing device according to claim 5, characterized in that, The current generator produces a current signal of 0-20mA.

7. The portable electro-hydraulic servo valve testing device according to claim 1 or 2, characterized in that, The current generator is also equipped with a display screen that shows the magnitude of the current signal.

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